Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Core routines and tables shareable across OS platforms. |
| 3 | * |
| 4 | * Copyright (c) 1994-2002 Justin T. Gibbs. |
| 5 | * Copyright (c) 2000-2002 Adaptec Inc. |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions, and the following disclaimer, |
| 13 | * without modification. |
| 14 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 15 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 16 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 17 | * including a substantially similar Disclaimer requirement for further |
| 18 | * binary redistribution. |
| 19 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 20 | * of any contributors may be used to endorse or promote products derived |
| 21 | * from this software without specific prior written permission. |
| 22 | * |
| 23 | * Alternatively, this software may be distributed under the terms of the |
| 24 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 25 | * Software Foundation. |
| 26 | * |
| 27 | * NO WARRANTY |
| 28 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 29 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 30 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 31 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 32 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 33 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 34 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 35 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 36 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 37 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 38 | * POSSIBILITY OF SUCH DAMAGES. |
| 39 | * |
James Bottomley | 79778a2 | 2005-08-04 17:33:22 -0500 | [diff] [blame] | 40 | * $Id: //depot/aic7xxx/aic7xxx/aic7xxx.c#155 $ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | */ |
| 42 | |
| 43 | #ifdef __linux__ |
| 44 | #include "aic7xxx_osm.h" |
| 45 | #include "aic7xxx_inline.h" |
| 46 | #include "aicasm/aicasm_insformat.h" |
| 47 | #else |
| 48 | #include <dev/aic7xxx/aic7xxx_osm.h> |
| 49 | #include <dev/aic7xxx/aic7xxx_inline.h> |
| 50 | #include <dev/aic7xxx/aicasm/aicasm_insformat.h> |
| 51 | #endif |
| 52 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | /***************************** Lookup Tables **********************************/ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 54 | static const char *const ahc_chip_names[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | "NONE", |
| 56 | "aic7770", |
| 57 | "aic7850", |
| 58 | "aic7855", |
| 59 | "aic7859", |
| 60 | "aic7860", |
| 61 | "aic7870", |
| 62 | "aic7880", |
| 63 | "aic7895", |
| 64 | "aic7895C", |
| 65 | "aic7890/91", |
| 66 | "aic7896/97", |
| 67 | "aic7892", |
| 68 | "aic7899" |
| 69 | }; |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 70 | static const u_int num_chip_names = ARRAY_SIZE(ahc_chip_names); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
| 72 | /* |
| 73 | * Hardware error codes. |
| 74 | */ |
| 75 | struct ahc_hard_error_entry { |
| 76 | uint8_t errno; |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 77 | const char *errmesg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | }; |
| 79 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 80 | static const struct ahc_hard_error_entry ahc_hard_errors[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | { ILLHADDR, "Illegal Host Access" }, |
| 82 | { ILLSADDR, "Illegal Sequencer Address referrenced" }, |
| 83 | { ILLOPCODE, "Illegal Opcode in sequencer program" }, |
| 84 | { SQPARERR, "Sequencer Parity Error" }, |
| 85 | { DPARERR, "Data-path Parity Error" }, |
| 86 | { MPARERR, "Scratch or SCB Memory Parity Error" }, |
| 87 | { PCIERRSTAT, "PCI Error detected" }, |
| 88 | { CIOPARERR, "CIOBUS Parity Error" }, |
| 89 | }; |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 90 | static const u_int num_errors = ARRAY_SIZE(ahc_hard_errors); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 92 | static const struct ahc_phase_table_entry ahc_phase_table[] = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | { |
| 94 | { P_DATAOUT, MSG_NOOP, "in Data-out phase" }, |
| 95 | { P_DATAIN, MSG_INITIATOR_DET_ERR, "in Data-in phase" }, |
| 96 | { P_DATAOUT_DT, MSG_NOOP, "in DT Data-out phase" }, |
| 97 | { P_DATAIN_DT, MSG_INITIATOR_DET_ERR, "in DT Data-in phase" }, |
| 98 | { P_COMMAND, MSG_NOOP, "in Command phase" }, |
| 99 | { P_MESGOUT, MSG_NOOP, "in Message-out phase" }, |
| 100 | { P_STATUS, MSG_INITIATOR_DET_ERR, "in Status phase" }, |
| 101 | { P_MESGIN, MSG_PARITY_ERROR, "in Message-in phase" }, |
| 102 | { P_BUSFREE, MSG_NOOP, "while idle" }, |
| 103 | { 0, MSG_NOOP, "in unknown phase" } |
| 104 | }; |
| 105 | |
| 106 | /* |
| 107 | * In most cases we only wish to itterate over real phases, so |
| 108 | * exclude the last element from the count. |
| 109 | */ |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 110 | static const u_int num_phases = ARRAY_SIZE(ahc_phase_table) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | |
| 112 | /* |
| 113 | * Valid SCSIRATE values. (p. 3-17) |
| 114 | * Provides a mapping of tranfer periods in ns to the proper value to |
| 115 | * stick in the scsixfer reg. |
| 116 | */ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 117 | static const struct ahc_syncrate ahc_syncrates[] = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | { |
| 119 | /* ultra2 fast/ultra period rate */ |
| 120 | { 0x42, 0x000, 9, "80.0" }, |
| 121 | { 0x03, 0x000, 10, "40.0" }, |
| 122 | { 0x04, 0x000, 11, "33.0" }, |
| 123 | { 0x05, 0x100, 12, "20.0" }, |
| 124 | { 0x06, 0x110, 15, "16.0" }, |
| 125 | { 0x07, 0x120, 18, "13.4" }, |
| 126 | { 0x08, 0x000, 25, "10.0" }, |
| 127 | { 0x19, 0x010, 31, "8.0" }, |
| 128 | { 0x1a, 0x020, 37, "6.67" }, |
| 129 | { 0x1b, 0x030, 43, "5.7" }, |
| 130 | { 0x1c, 0x040, 50, "5.0" }, |
| 131 | { 0x00, 0x050, 56, "4.4" }, |
| 132 | { 0x00, 0x060, 62, "4.0" }, |
| 133 | { 0x00, 0x070, 68, "3.6" }, |
| 134 | { 0x00, 0x000, 0, NULL } |
| 135 | }; |
| 136 | |
| 137 | /* Our Sequencer Program */ |
| 138 | #include "aic7xxx_seq.h" |
| 139 | |
| 140 | /**************************** Function Declarations ***************************/ |
| 141 | static void ahc_force_renegotiation(struct ahc_softc *ahc, |
| 142 | struct ahc_devinfo *devinfo); |
| 143 | static struct ahc_tmode_tstate* |
| 144 | ahc_alloc_tstate(struct ahc_softc *ahc, |
| 145 | u_int scsi_id, char channel); |
| 146 | #ifdef AHC_TARGET_MODE |
| 147 | static void ahc_free_tstate(struct ahc_softc *ahc, |
| 148 | u_int scsi_id, char channel, int force); |
| 149 | #endif |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 150 | static const struct ahc_syncrate* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | ahc_devlimited_syncrate(struct ahc_softc *ahc, |
| 152 | struct ahc_initiator_tinfo *, |
| 153 | u_int *period, |
| 154 | u_int *ppr_options, |
| 155 | role_t role); |
| 156 | static void ahc_update_pending_scbs(struct ahc_softc *ahc); |
| 157 | static void ahc_fetch_devinfo(struct ahc_softc *ahc, |
| 158 | struct ahc_devinfo *devinfo); |
| 159 | static void ahc_scb_devinfo(struct ahc_softc *ahc, |
| 160 | struct ahc_devinfo *devinfo, |
| 161 | struct scb *scb); |
| 162 | static void ahc_assert_atn(struct ahc_softc *ahc); |
| 163 | static void ahc_setup_initiator_msgout(struct ahc_softc *ahc, |
| 164 | struct ahc_devinfo *devinfo, |
| 165 | struct scb *scb); |
| 166 | static void ahc_build_transfer_msg(struct ahc_softc *ahc, |
| 167 | struct ahc_devinfo *devinfo); |
| 168 | static void ahc_construct_sdtr(struct ahc_softc *ahc, |
| 169 | struct ahc_devinfo *devinfo, |
| 170 | u_int period, u_int offset); |
| 171 | static void ahc_construct_wdtr(struct ahc_softc *ahc, |
| 172 | struct ahc_devinfo *devinfo, |
| 173 | u_int bus_width); |
| 174 | static void ahc_construct_ppr(struct ahc_softc *ahc, |
| 175 | struct ahc_devinfo *devinfo, |
| 176 | u_int period, u_int offset, |
| 177 | u_int bus_width, u_int ppr_options); |
| 178 | static void ahc_clear_msg_state(struct ahc_softc *ahc); |
| 179 | static void ahc_handle_proto_violation(struct ahc_softc *ahc); |
| 180 | static void ahc_handle_message_phase(struct ahc_softc *ahc); |
| 181 | typedef enum { |
| 182 | AHCMSG_1B, |
| 183 | AHCMSG_2B, |
| 184 | AHCMSG_EXT |
| 185 | } ahc_msgtype; |
| 186 | static int ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type, |
| 187 | u_int msgval, int full); |
| 188 | static int ahc_parse_msg(struct ahc_softc *ahc, |
| 189 | struct ahc_devinfo *devinfo); |
| 190 | static int ahc_handle_msg_reject(struct ahc_softc *ahc, |
| 191 | struct ahc_devinfo *devinfo); |
| 192 | static void ahc_handle_ign_wide_residue(struct ahc_softc *ahc, |
| 193 | struct ahc_devinfo *devinfo); |
| 194 | static void ahc_reinitialize_dataptrs(struct ahc_softc *ahc); |
| 195 | static void ahc_handle_devreset(struct ahc_softc *ahc, |
| 196 | struct ahc_devinfo *devinfo, |
| 197 | cam_status status, char *message, |
| 198 | int verbose_level); |
| 199 | #ifdef AHC_TARGET_MODE |
| 200 | static void ahc_setup_target_msgin(struct ahc_softc *ahc, |
| 201 | struct ahc_devinfo *devinfo, |
| 202 | struct scb *scb); |
| 203 | #endif |
| 204 | |
| 205 | static bus_dmamap_callback_t ahc_dmamap_cb; |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 206 | static void ahc_build_free_scb_list(struct ahc_softc *ahc); |
| 207 | static int ahc_init_scbdata(struct ahc_softc *ahc); |
| 208 | static void ahc_fini_scbdata(struct ahc_softc *ahc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | static void ahc_qinfifo_requeue(struct ahc_softc *ahc, |
| 210 | struct scb *prev_scb, |
| 211 | struct scb *scb); |
| 212 | static int ahc_qinfifo_count(struct ahc_softc *ahc); |
| 213 | static u_int ahc_rem_scb_from_disc_list(struct ahc_softc *ahc, |
| 214 | u_int prev, u_int scbptr); |
| 215 | static void ahc_add_curscb_to_free_list(struct ahc_softc *ahc); |
| 216 | static u_int ahc_rem_wscb(struct ahc_softc *ahc, |
| 217 | u_int scbpos, u_int prev); |
| 218 | static void ahc_reset_current_bus(struct ahc_softc *ahc); |
| 219 | #ifdef AHC_DUMP_SEQ |
| 220 | static void ahc_dumpseq(struct ahc_softc *ahc); |
| 221 | #endif |
| 222 | static int ahc_loadseq(struct ahc_softc *ahc); |
| 223 | static int ahc_check_patch(struct ahc_softc *ahc, |
Denys Vlasenko | 980b306 | 2008-04-25 04:36:01 +0200 | [diff] [blame] | 224 | const struct patch **start_patch, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | u_int start_instr, u_int *skip_addr); |
| 226 | static void ahc_download_instr(struct ahc_softc *ahc, |
| 227 | u_int instrptr, uint8_t *dconsts); |
| 228 | #ifdef AHC_TARGET_MODE |
| 229 | static void ahc_queue_lstate_event(struct ahc_softc *ahc, |
| 230 | struct ahc_tmode_lstate *lstate, |
| 231 | u_int initiator_id, |
| 232 | u_int event_type, |
| 233 | u_int event_arg); |
| 234 | static void ahc_update_scsiid(struct ahc_softc *ahc, |
| 235 | u_int targid_mask); |
| 236 | static int ahc_handle_target_cmd(struct ahc_softc *ahc, |
| 237 | struct target_cmd *cmd); |
| 238 | #endif |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 239 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 240 | static u_int ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl); |
| 241 | static void ahc_unbusy_tcl(struct ahc_softc *ahc, u_int tcl); |
| 242 | static void ahc_busy_tcl(struct ahc_softc *ahc, |
| 243 | u_int tcl, u_int busyid); |
| 244 | |
| 245 | /************************** SCB and SCB queue management **********************/ |
| 246 | static void ahc_run_untagged_queues(struct ahc_softc *ahc); |
| 247 | static void ahc_run_untagged_queue(struct ahc_softc *ahc, |
| 248 | struct scb_tailq *queue); |
| 249 | |
| 250 | /****************************** Initialization ********************************/ |
| 251 | static void ahc_alloc_scbs(struct ahc_softc *ahc); |
| 252 | static void ahc_shutdown(void *arg); |
| 253 | |
| 254 | /*************************** Interrupt Services *******************************/ |
| 255 | static void ahc_clear_intstat(struct ahc_softc *ahc); |
| 256 | static void ahc_run_qoutfifo(struct ahc_softc *ahc); |
| 257 | #ifdef AHC_TARGET_MODE |
| 258 | static void ahc_run_tqinfifo(struct ahc_softc *ahc, int paused); |
| 259 | #endif |
| 260 | static void ahc_handle_brkadrint(struct ahc_softc *ahc); |
| 261 | static void ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat); |
| 262 | static void ahc_handle_scsiint(struct ahc_softc *ahc, |
| 263 | u_int intstat); |
| 264 | static void ahc_clear_critical_section(struct ahc_softc *ahc); |
| 265 | |
| 266 | /***************************** Error Recovery *********************************/ |
| 267 | static void ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb); |
| 268 | static int ahc_abort_scbs(struct ahc_softc *ahc, int target, |
| 269 | char channel, int lun, u_int tag, |
| 270 | role_t role, uint32_t status); |
| 271 | static void ahc_calc_residual(struct ahc_softc *ahc, |
| 272 | struct scb *scb); |
| 273 | |
| 274 | /*********************** Untagged Transaction Routines ************************/ |
| 275 | static inline void ahc_freeze_untagged_queues(struct ahc_softc *ahc); |
| 276 | static inline void ahc_release_untagged_queues(struct ahc_softc *ahc); |
| 277 | |
| 278 | /* |
| 279 | * Block our completion routine from starting the next untagged |
| 280 | * transaction for this target or target lun. |
| 281 | */ |
| 282 | static inline void |
| 283 | ahc_freeze_untagged_queues(struct ahc_softc *ahc) |
| 284 | { |
| 285 | if ((ahc->flags & AHC_SCB_BTT) == 0) |
| 286 | ahc->untagged_queue_lock++; |
| 287 | } |
| 288 | |
| 289 | /* |
| 290 | * Allow the next untagged transaction for this target or target lun |
| 291 | * to be executed. We use a counting semaphore to allow the lock |
| 292 | * to be acquired recursively. Once the count drops to zero, the |
| 293 | * transaction queues will be run. |
| 294 | */ |
| 295 | static inline void |
| 296 | ahc_release_untagged_queues(struct ahc_softc *ahc) |
| 297 | { |
| 298 | if ((ahc->flags & AHC_SCB_BTT) == 0) { |
| 299 | ahc->untagged_queue_lock--; |
| 300 | if (ahc->untagged_queue_lock == 0) |
| 301 | ahc_run_untagged_queues(ahc); |
| 302 | } |
| 303 | } |
| 304 | |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 305 | /************************* Sequencer Execution Control ************************/ |
| 306 | /* |
| 307 | * Work around any chip bugs related to halting sequencer execution. |
| 308 | * On Ultra2 controllers, we must clear the CIOBUS stretch signal by |
| 309 | * reading a register that will set this signal and deassert it. |
| 310 | * Without this workaround, if the chip is paused, by an interrupt or |
| 311 | * manual pause while accessing scb ram, accesses to certain registers |
| 312 | * will hang the system (infinite pci retries). |
| 313 | */ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 314 | static void |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 315 | ahc_pause_bug_fix(struct ahc_softc *ahc) |
| 316 | { |
| 317 | if ((ahc->features & AHC_ULTRA2) != 0) |
| 318 | (void)ahc_inb(ahc, CCSCBCTL); |
| 319 | } |
| 320 | |
| 321 | /* |
| 322 | * Determine whether the sequencer has halted code execution. |
| 323 | * Returns non-zero status if the sequencer is stopped. |
| 324 | */ |
| 325 | int |
| 326 | ahc_is_paused(struct ahc_softc *ahc) |
| 327 | { |
| 328 | return ((ahc_inb(ahc, HCNTRL) & PAUSE) != 0); |
| 329 | } |
| 330 | |
| 331 | /* |
| 332 | * Request that the sequencer stop and wait, indefinitely, for it |
| 333 | * to stop. The sequencer will only acknowledge that it is paused |
| 334 | * once it has reached an instruction boundary and PAUSEDIS is |
| 335 | * cleared in the SEQCTL register. The sequencer may use PAUSEDIS |
| 336 | * for critical sections. |
| 337 | */ |
| 338 | void |
| 339 | ahc_pause(struct ahc_softc *ahc) |
| 340 | { |
| 341 | ahc_outb(ahc, HCNTRL, ahc->pause); |
| 342 | |
| 343 | /* |
| 344 | * Since the sequencer can disable pausing in a critical section, we |
| 345 | * must loop until it actually stops. |
| 346 | */ |
| 347 | while (ahc_is_paused(ahc) == 0) |
| 348 | ; |
| 349 | |
| 350 | ahc_pause_bug_fix(ahc); |
| 351 | } |
| 352 | |
| 353 | /* |
| 354 | * Allow the sequencer to continue program execution. |
| 355 | * We check here to ensure that no additional interrupt |
| 356 | * sources that would cause the sequencer to halt have been |
| 357 | * asserted. If, for example, a SCSI bus reset is detected |
| 358 | * while we are fielding a different, pausing, interrupt type, |
| 359 | * we don't want to release the sequencer before going back |
| 360 | * into our interrupt handler and dealing with this new |
| 361 | * condition. |
| 362 | */ |
| 363 | void |
| 364 | ahc_unpause(struct ahc_softc *ahc) |
| 365 | { |
| 366 | if ((ahc_inb(ahc, INTSTAT) & (SCSIINT | SEQINT | BRKADRINT)) == 0) |
| 367 | ahc_outb(ahc, HCNTRL, ahc->unpause); |
| 368 | } |
| 369 | |
| 370 | /************************** Memory mapping routines ***************************/ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 371 | static struct ahc_dma_seg * |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 372 | ahc_sg_bus_to_virt(struct scb *scb, uint32_t sg_busaddr) |
| 373 | { |
| 374 | int sg_index; |
| 375 | |
| 376 | sg_index = (sg_busaddr - scb->sg_list_phys)/sizeof(struct ahc_dma_seg); |
| 377 | /* sg_list_phys points to entry 1, not 0 */ |
| 378 | sg_index++; |
| 379 | |
| 380 | return (&scb->sg_list[sg_index]); |
| 381 | } |
| 382 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 383 | static uint32_t |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 384 | ahc_sg_virt_to_bus(struct scb *scb, struct ahc_dma_seg *sg) |
| 385 | { |
| 386 | int sg_index; |
| 387 | |
| 388 | /* sg_list_phys points to entry 1, not 0 */ |
| 389 | sg_index = sg - &scb->sg_list[1]; |
| 390 | |
| 391 | return (scb->sg_list_phys + (sg_index * sizeof(*scb->sg_list))); |
| 392 | } |
| 393 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 394 | static uint32_t |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 395 | ahc_hscb_busaddr(struct ahc_softc *ahc, u_int index) |
| 396 | { |
| 397 | return (ahc->scb_data->hscb_busaddr |
| 398 | + (sizeof(struct hardware_scb) * index)); |
| 399 | } |
| 400 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 401 | static void |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 402 | ahc_sync_scb(struct ahc_softc *ahc, struct scb *scb, int op) |
| 403 | { |
| 404 | ahc_dmamap_sync(ahc, ahc->scb_data->hscb_dmat, |
| 405 | ahc->scb_data->hscb_dmamap, |
| 406 | /*offset*/(scb->hscb - ahc->hscbs) * sizeof(*scb->hscb), |
| 407 | /*len*/sizeof(*scb->hscb), op); |
| 408 | } |
| 409 | |
| 410 | void |
| 411 | ahc_sync_sglist(struct ahc_softc *ahc, struct scb *scb, int op) |
| 412 | { |
| 413 | if (scb->sg_count == 0) |
| 414 | return; |
| 415 | |
| 416 | ahc_dmamap_sync(ahc, ahc->scb_data->sg_dmat, scb->sg_map->sg_dmamap, |
| 417 | /*offset*/(scb->sg_list - scb->sg_map->sg_vaddr) |
| 418 | * sizeof(struct ahc_dma_seg), |
| 419 | /*len*/sizeof(struct ahc_dma_seg) * scb->sg_count, op); |
| 420 | } |
| 421 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 422 | #ifdef AHC_TARGET_MODE |
| 423 | static uint32_t |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 424 | ahc_targetcmd_offset(struct ahc_softc *ahc, u_int index) |
| 425 | { |
| 426 | return (((uint8_t *)&ahc->targetcmds[index]) - ahc->qoutfifo); |
| 427 | } |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 428 | #endif |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 429 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 430 | /*********************** Miscellaneous Support Functions ***********************/ |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 431 | /* |
| 432 | * Determine whether the sequencer reported a residual |
| 433 | * for this SCB/transaction. |
| 434 | */ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 435 | static void |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 436 | ahc_update_residual(struct ahc_softc *ahc, struct scb *scb) |
| 437 | { |
| 438 | uint32_t sgptr; |
| 439 | |
| 440 | sgptr = ahc_le32toh(scb->hscb->sgptr); |
| 441 | if ((sgptr & SG_RESID_VALID) != 0) |
| 442 | ahc_calc_residual(ahc, scb); |
| 443 | } |
| 444 | |
| 445 | /* |
| 446 | * Return pointers to the transfer negotiation information |
| 447 | * for the specified our_id/remote_id pair. |
| 448 | */ |
| 449 | struct ahc_initiator_tinfo * |
| 450 | ahc_fetch_transinfo(struct ahc_softc *ahc, char channel, u_int our_id, |
| 451 | u_int remote_id, struct ahc_tmode_tstate **tstate) |
| 452 | { |
| 453 | /* |
| 454 | * Transfer data structures are stored from the perspective |
| 455 | * of the target role. Since the parameters for a connection |
| 456 | * in the initiator role to a given target are the same as |
| 457 | * when the roles are reversed, we pretend we are the target. |
| 458 | */ |
| 459 | if (channel == 'B') |
| 460 | our_id += 8; |
| 461 | *tstate = ahc->enabled_targets[our_id]; |
| 462 | return (&(*tstate)->transinfo[remote_id]); |
| 463 | } |
| 464 | |
| 465 | uint16_t |
| 466 | ahc_inw(struct ahc_softc *ahc, u_int port) |
| 467 | { |
| 468 | uint16_t r = ahc_inb(ahc, port+1) << 8; |
| 469 | return r | ahc_inb(ahc, port); |
| 470 | } |
| 471 | |
| 472 | void |
| 473 | ahc_outw(struct ahc_softc *ahc, u_int port, u_int value) |
| 474 | { |
| 475 | ahc_outb(ahc, port, value & 0xFF); |
| 476 | ahc_outb(ahc, port+1, (value >> 8) & 0xFF); |
| 477 | } |
| 478 | |
| 479 | uint32_t |
| 480 | ahc_inl(struct ahc_softc *ahc, u_int port) |
| 481 | { |
| 482 | return ((ahc_inb(ahc, port)) |
| 483 | | (ahc_inb(ahc, port+1) << 8) |
| 484 | | (ahc_inb(ahc, port+2) << 16) |
| 485 | | (ahc_inb(ahc, port+3) << 24)); |
| 486 | } |
| 487 | |
| 488 | void |
| 489 | ahc_outl(struct ahc_softc *ahc, u_int port, uint32_t value) |
| 490 | { |
| 491 | ahc_outb(ahc, port, (value) & 0xFF); |
| 492 | ahc_outb(ahc, port+1, ((value) >> 8) & 0xFF); |
| 493 | ahc_outb(ahc, port+2, ((value) >> 16) & 0xFF); |
| 494 | ahc_outb(ahc, port+3, ((value) >> 24) & 0xFF); |
| 495 | } |
| 496 | |
| 497 | uint64_t |
| 498 | ahc_inq(struct ahc_softc *ahc, u_int port) |
| 499 | { |
| 500 | return ((ahc_inb(ahc, port)) |
| 501 | | (ahc_inb(ahc, port+1) << 8) |
| 502 | | (ahc_inb(ahc, port+2) << 16) |
| 503 | | (ahc_inb(ahc, port+3) << 24) |
| 504 | | (((uint64_t)ahc_inb(ahc, port+4)) << 32) |
| 505 | | (((uint64_t)ahc_inb(ahc, port+5)) << 40) |
| 506 | | (((uint64_t)ahc_inb(ahc, port+6)) << 48) |
| 507 | | (((uint64_t)ahc_inb(ahc, port+7)) << 56)); |
| 508 | } |
| 509 | |
| 510 | void |
| 511 | ahc_outq(struct ahc_softc *ahc, u_int port, uint64_t value) |
| 512 | { |
| 513 | ahc_outb(ahc, port, value & 0xFF); |
| 514 | ahc_outb(ahc, port+1, (value >> 8) & 0xFF); |
| 515 | ahc_outb(ahc, port+2, (value >> 16) & 0xFF); |
| 516 | ahc_outb(ahc, port+3, (value >> 24) & 0xFF); |
| 517 | ahc_outb(ahc, port+4, (value >> 32) & 0xFF); |
| 518 | ahc_outb(ahc, port+5, (value >> 40) & 0xFF); |
| 519 | ahc_outb(ahc, port+6, (value >> 48) & 0xFF); |
| 520 | ahc_outb(ahc, port+7, (value >> 56) & 0xFF); |
| 521 | } |
| 522 | |
| 523 | /* |
| 524 | * Get a free scb. If there are none, see if we can allocate a new SCB. |
| 525 | */ |
| 526 | struct scb * |
| 527 | ahc_get_scb(struct ahc_softc *ahc) |
| 528 | { |
| 529 | struct scb *scb; |
| 530 | |
| 531 | if ((scb = SLIST_FIRST(&ahc->scb_data->free_scbs)) == NULL) { |
| 532 | ahc_alloc_scbs(ahc); |
| 533 | scb = SLIST_FIRST(&ahc->scb_data->free_scbs); |
| 534 | if (scb == NULL) |
| 535 | return (NULL); |
| 536 | } |
| 537 | SLIST_REMOVE_HEAD(&ahc->scb_data->free_scbs, links.sle); |
| 538 | return (scb); |
| 539 | } |
| 540 | |
| 541 | /* |
| 542 | * Return an SCB resource to the free list. |
| 543 | */ |
| 544 | void |
| 545 | ahc_free_scb(struct ahc_softc *ahc, struct scb *scb) |
| 546 | { |
| 547 | struct hardware_scb *hscb; |
| 548 | |
| 549 | hscb = scb->hscb; |
| 550 | /* Clean up for the next user */ |
| 551 | ahc->scb_data->scbindex[hscb->tag] = NULL; |
| 552 | scb->flags = SCB_FREE; |
| 553 | hscb->control = 0; |
| 554 | |
| 555 | SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs, scb, links.sle); |
| 556 | |
| 557 | /* Notify the OSM that a resource is now available. */ |
| 558 | ahc_platform_scb_free(ahc, scb); |
| 559 | } |
| 560 | |
| 561 | struct scb * |
| 562 | ahc_lookup_scb(struct ahc_softc *ahc, u_int tag) |
| 563 | { |
| 564 | struct scb* scb; |
| 565 | |
| 566 | scb = ahc->scb_data->scbindex[tag]; |
| 567 | if (scb != NULL) |
| 568 | ahc_sync_scb(ahc, scb, |
| 569 | BUS_DMASYNC_POSTREAD|BUS_DMASYNC_POSTWRITE); |
| 570 | return (scb); |
| 571 | } |
| 572 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 573 | static void |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 574 | ahc_swap_with_next_hscb(struct ahc_softc *ahc, struct scb *scb) |
| 575 | { |
| 576 | struct hardware_scb *q_hscb; |
| 577 | u_int saved_tag; |
| 578 | |
| 579 | /* |
| 580 | * Our queuing method is a bit tricky. The card |
| 581 | * knows in advance which HSCB to download, and we |
| 582 | * can't disappoint it. To achieve this, the next |
| 583 | * SCB to download is saved off in ahc->next_queued_scb. |
| 584 | * When we are called to queue "an arbitrary scb", |
| 585 | * we copy the contents of the incoming HSCB to the one |
| 586 | * the sequencer knows about, swap HSCB pointers and |
| 587 | * finally assign the SCB to the tag indexed location |
| 588 | * in the scb_array. This makes sure that we can still |
| 589 | * locate the correct SCB by SCB_TAG. |
| 590 | */ |
| 591 | q_hscb = ahc->next_queued_scb->hscb; |
| 592 | saved_tag = q_hscb->tag; |
| 593 | memcpy(q_hscb, scb->hscb, sizeof(*scb->hscb)); |
| 594 | if ((scb->flags & SCB_CDB32_PTR) != 0) { |
| 595 | q_hscb->shared_data.cdb_ptr = |
| 596 | ahc_htole32(ahc_hscb_busaddr(ahc, q_hscb->tag) |
| 597 | + offsetof(struct hardware_scb, cdb32)); |
| 598 | } |
| 599 | q_hscb->tag = saved_tag; |
| 600 | q_hscb->next = scb->hscb->tag; |
| 601 | |
| 602 | /* Now swap HSCB pointers. */ |
| 603 | ahc->next_queued_scb->hscb = scb->hscb; |
| 604 | scb->hscb = q_hscb; |
| 605 | |
| 606 | /* Now define the mapping from tag to SCB in the scbindex */ |
| 607 | ahc->scb_data->scbindex[scb->hscb->tag] = scb; |
| 608 | } |
| 609 | |
| 610 | /* |
| 611 | * Tell the sequencer about a new transaction to execute. |
| 612 | */ |
| 613 | void |
| 614 | ahc_queue_scb(struct ahc_softc *ahc, struct scb *scb) |
| 615 | { |
| 616 | ahc_swap_with_next_hscb(ahc, scb); |
| 617 | |
| 618 | if (scb->hscb->tag == SCB_LIST_NULL |
| 619 | || scb->hscb->next == SCB_LIST_NULL) |
| 620 | panic("Attempt to queue invalid SCB tag %x:%x\n", |
| 621 | scb->hscb->tag, scb->hscb->next); |
| 622 | |
| 623 | /* |
| 624 | * Setup data "oddness". |
| 625 | */ |
| 626 | scb->hscb->lun &= LID; |
| 627 | if (ahc_get_transfer_length(scb) & 0x1) |
| 628 | scb->hscb->lun |= SCB_XFERLEN_ODD; |
| 629 | |
| 630 | /* |
| 631 | * Keep a history of SCBs we've downloaded in the qinfifo. |
| 632 | */ |
| 633 | ahc->qinfifo[ahc->qinfifonext++] = scb->hscb->tag; |
| 634 | |
| 635 | /* |
| 636 | * Make sure our data is consistent from the |
| 637 | * perspective of the adapter. |
| 638 | */ |
| 639 | ahc_sync_scb(ahc, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); |
| 640 | |
| 641 | /* Tell the adapter about the newly queued SCB */ |
| 642 | if ((ahc->features & AHC_QUEUE_REGS) != 0) { |
| 643 | ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); |
| 644 | } else { |
| 645 | if ((ahc->features & AHC_AUTOPAUSE) == 0) |
| 646 | ahc_pause(ahc); |
| 647 | ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); |
| 648 | if ((ahc->features & AHC_AUTOPAUSE) == 0) |
| 649 | ahc_unpause(ahc); |
| 650 | } |
| 651 | } |
| 652 | |
| 653 | struct scsi_sense_data * |
| 654 | ahc_get_sense_buf(struct ahc_softc *ahc, struct scb *scb) |
| 655 | { |
| 656 | int offset; |
| 657 | |
| 658 | offset = scb - ahc->scb_data->scbarray; |
| 659 | return (&ahc->scb_data->sense[offset]); |
| 660 | } |
| 661 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 662 | static uint32_t |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 663 | ahc_get_sense_bufaddr(struct ahc_softc *ahc, struct scb *scb) |
| 664 | { |
| 665 | int offset; |
| 666 | |
| 667 | offset = scb - ahc->scb_data->scbarray; |
| 668 | return (ahc->scb_data->sense_busaddr |
| 669 | + (offset * sizeof(struct scsi_sense_data))); |
| 670 | } |
| 671 | |
| 672 | /************************** Interrupt Processing ******************************/ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 673 | static void |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 674 | ahc_sync_qoutfifo(struct ahc_softc *ahc, int op) |
| 675 | { |
| 676 | ahc_dmamap_sync(ahc, ahc->shared_data_dmat, ahc->shared_data_dmamap, |
| 677 | /*offset*/0, /*len*/256, op); |
| 678 | } |
| 679 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 680 | static void |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 681 | ahc_sync_tqinfifo(struct ahc_softc *ahc, int op) |
| 682 | { |
| 683 | #ifdef AHC_TARGET_MODE |
| 684 | if ((ahc->flags & AHC_TARGETROLE) != 0) { |
| 685 | ahc_dmamap_sync(ahc, ahc->shared_data_dmat, |
| 686 | ahc->shared_data_dmamap, |
| 687 | ahc_targetcmd_offset(ahc, 0), |
| 688 | sizeof(struct target_cmd) * AHC_TMODE_CMDS, |
| 689 | op); |
| 690 | } |
| 691 | #endif |
| 692 | } |
| 693 | |
| 694 | /* |
| 695 | * See if the firmware has posted any completed commands |
| 696 | * into our in-core command complete fifos. |
| 697 | */ |
| 698 | #define AHC_RUN_QOUTFIFO 0x1 |
| 699 | #define AHC_RUN_TQINFIFO 0x2 |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 700 | static u_int |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 701 | ahc_check_cmdcmpltqueues(struct ahc_softc *ahc) |
| 702 | { |
| 703 | u_int retval; |
| 704 | |
| 705 | retval = 0; |
| 706 | ahc_dmamap_sync(ahc, ahc->shared_data_dmat, ahc->shared_data_dmamap, |
| 707 | /*offset*/ahc->qoutfifonext, /*len*/1, |
| 708 | BUS_DMASYNC_POSTREAD); |
| 709 | if (ahc->qoutfifo[ahc->qoutfifonext] != SCB_LIST_NULL) |
| 710 | retval |= AHC_RUN_QOUTFIFO; |
| 711 | #ifdef AHC_TARGET_MODE |
| 712 | if ((ahc->flags & AHC_TARGETROLE) != 0 |
| 713 | && (ahc->flags & AHC_TQINFIFO_BLOCKED) == 0) { |
| 714 | ahc_dmamap_sync(ahc, ahc->shared_data_dmat, |
| 715 | ahc->shared_data_dmamap, |
| 716 | ahc_targetcmd_offset(ahc, ahc->tqinfifofnext), |
| 717 | /*len*/sizeof(struct target_cmd), |
| 718 | BUS_DMASYNC_POSTREAD); |
| 719 | if (ahc->targetcmds[ahc->tqinfifonext].cmd_valid != 0) |
| 720 | retval |= AHC_RUN_TQINFIFO; |
| 721 | } |
| 722 | #endif |
| 723 | return (retval); |
| 724 | } |
| 725 | |
| 726 | /* |
| 727 | * Catch an interrupt from the adapter |
| 728 | */ |
| 729 | int |
| 730 | ahc_intr(struct ahc_softc *ahc) |
| 731 | { |
| 732 | u_int intstat; |
| 733 | |
| 734 | if ((ahc->pause & INTEN) == 0) { |
| 735 | /* |
| 736 | * Our interrupt is not enabled on the chip |
| 737 | * and may be disabled for re-entrancy reasons, |
| 738 | * so just return. This is likely just a shared |
| 739 | * interrupt. |
| 740 | */ |
| 741 | return (0); |
| 742 | } |
| 743 | /* |
| 744 | * Instead of directly reading the interrupt status register, |
| 745 | * infer the cause of the interrupt by checking our in-core |
| 746 | * completion queues. This avoids a costly PCI bus read in |
| 747 | * most cases. |
| 748 | */ |
| 749 | if ((ahc->flags & (AHC_ALL_INTERRUPTS|AHC_EDGE_INTERRUPT)) == 0 |
| 750 | && (ahc_check_cmdcmpltqueues(ahc) != 0)) |
| 751 | intstat = CMDCMPLT; |
| 752 | else { |
| 753 | intstat = ahc_inb(ahc, INTSTAT); |
| 754 | } |
| 755 | |
| 756 | if ((intstat & INT_PEND) == 0) { |
| 757 | #if AHC_PCI_CONFIG > 0 |
| 758 | if (ahc->unsolicited_ints > 500) { |
| 759 | ahc->unsolicited_ints = 0; |
| 760 | if ((ahc->chip & AHC_PCI) != 0 |
| 761 | && (ahc_inb(ahc, ERROR) & PCIERRSTAT) != 0) |
| 762 | ahc->bus_intr(ahc); |
| 763 | } |
| 764 | #endif |
| 765 | ahc->unsolicited_ints++; |
| 766 | return (0); |
| 767 | } |
| 768 | ahc->unsolicited_ints = 0; |
| 769 | |
| 770 | if (intstat & CMDCMPLT) { |
| 771 | ahc_outb(ahc, CLRINT, CLRCMDINT); |
| 772 | |
| 773 | /* |
| 774 | * Ensure that the chip sees that we've cleared |
| 775 | * this interrupt before we walk the output fifo. |
| 776 | * Otherwise, we may, due to posted bus writes, |
| 777 | * clear the interrupt after we finish the scan, |
| 778 | * and after the sequencer has added new entries |
| 779 | * and asserted the interrupt again. |
| 780 | */ |
| 781 | ahc_flush_device_writes(ahc); |
| 782 | ahc_run_qoutfifo(ahc); |
| 783 | #ifdef AHC_TARGET_MODE |
| 784 | if ((ahc->flags & AHC_TARGETROLE) != 0) |
| 785 | ahc_run_tqinfifo(ahc, /*paused*/FALSE); |
| 786 | #endif |
| 787 | } |
| 788 | |
| 789 | /* |
| 790 | * Handle statuses that may invalidate our cached |
| 791 | * copy of INTSTAT separately. |
| 792 | */ |
| 793 | if (intstat == 0xFF && (ahc->features & AHC_REMOVABLE) != 0) { |
| 794 | /* Hot eject. Do nothing */ |
| 795 | } else if (intstat & BRKADRINT) { |
| 796 | ahc_handle_brkadrint(ahc); |
| 797 | } else if ((intstat & (SEQINT|SCSIINT)) != 0) { |
| 798 | |
| 799 | ahc_pause_bug_fix(ahc); |
| 800 | |
| 801 | if ((intstat & SEQINT) != 0) |
| 802 | ahc_handle_seqint(ahc, intstat); |
| 803 | |
| 804 | if ((intstat & SCSIINT) != 0) |
| 805 | ahc_handle_scsiint(ahc, intstat); |
| 806 | } |
| 807 | return (1); |
| 808 | } |
| 809 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | /************************* Sequencer Execution Control ************************/ |
| 811 | /* |
| 812 | * Restart the sequencer program from address zero |
| 813 | */ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 814 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | ahc_restart(struct ahc_softc *ahc) |
| 816 | { |
thomas schorpp | 7583221 | 2008-10-03 23:45:29 +0200 | [diff] [blame] | 817 | uint8_t sblkctl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | |
| 819 | ahc_pause(ahc); |
| 820 | |
| 821 | /* No more pending messages. */ |
| 822 | ahc_clear_msg_state(ahc); |
| 823 | |
| 824 | ahc_outb(ahc, SCSISIGO, 0); /* De-assert BSY */ |
| 825 | ahc_outb(ahc, MSG_OUT, MSG_NOOP); /* No message to send */ |
| 826 | ahc_outb(ahc, SXFRCTL1, ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET); |
| 827 | ahc_outb(ahc, LASTPHASE, P_BUSFREE); |
| 828 | ahc_outb(ahc, SAVED_SCSIID, 0xFF); |
| 829 | ahc_outb(ahc, SAVED_LUN, 0xFF); |
| 830 | |
| 831 | /* |
| 832 | * Ensure that the sequencer's idea of TQINPOS |
| 833 | * matches our own. The sequencer increments TQINPOS |
| 834 | * only after it sees a DMA complete and a reset could |
| 835 | * occur before the increment leaving the kernel to believe |
| 836 | * the command arrived but the sequencer to not. |
| 837 | */ |
| 838 | ahc_outb(ahc, TQINPOS, ahc->tqinfifonext); |
| 839 | |
| 840 | /* Always allow reselection */ |
| 841 | ahc_outb(ahc, SCSISEQ, |
| 842 | ahc_inb(ahc, SCSISEQ_TEMPLATE) & (ENSELI|ENRSELI|ENAUTOATNP)); |
| 843 | if ((ahc->features & AHC_CMD_CHAN) != 0) { |
| 844 | /* Ensure that no DMA operations are in progress */ |
| 845 | ahc_outb(ahc, CCSCBCNT, 0); |
| 846 | ahc_outb(ahc, CCSGCTL, 0); |
| 847 | ahc_outb(ahc, CCSCBCTL, 0); |
| 848 | } |
| 849 | /* |
| 850 | * If we were in the process of DMA'ing SCB data into |
| 851 | * an SCB, replace that SCB on the free list. This prevents |
| 852 | * an SCB leak. |
| 853 | */ |
| 854 | if ((ahc_inb(ahc, SEQ_FLAGS2) & SCB_DMA) != 0) { |
| 855 | ahc_add_curscb_to_free_list(ahc); |
| 856 | ahc_outb(ahc, SEQ_FLAGS2, |
| 857 | ahc_inb(ahc, SEQ_FLAGS2) & ~SCB_DMA); |
| 858 | } |
James Bottomley | 79778a2 | 2005-08-04 17:33:22 -0500 | [diff] [blame] | 859 | |
| 860 | /* |
| 861 | * Clear any pending sequencer interrupt. It is no |
| 862 | * longer relevant since we're resetting the Program |
| 863 | * Counter. |
| 864 | */ |
| 865 | ahc_outb(ahc, CLRINT, CLRSEQINT); |
| 866 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | ahc_outb(ahc, MWI_RESIDUAL, 0); |
| 868 | ahc_outb(ahc, SEQCTL, ahc->seqctl); |
| 869 | ahc_outb(ahc, SEQADDR0, 0); |
| 870 | ahc_outb(ahc, SEQADDR1, 0); |
James Bottomley | 79778a2 | 2005-08-04 17:33:22 -0500 | [diff] [blame] | 871 | |
thomas schorpp | 7583221 | 2008-10-03 23:45:29 +0200 | [diff] [blame] | 872 | /* |
| 873 | * Take the LED out of diagnostic mode on PM resume, too |
| 874 | */ |
| 875 | sblkctl = ahc_inb(ahc, SBLKCTL); |
| 876 | ahc_outb(ahc, SBLKCTL, (sblkctl & ~(DIAGLEDEN|DIAGLEDON))); |
| 877 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | ahc_unpause(ahc); |
| 879 | } |
| 880 | |
| 881 | /************************* Input/Output Queues ********************************/ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 882 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | ahc_run_qoutfifo(struct ahc_softc *ahc) |
| 884 | { |
| 885 | struct scb *scb; |
| 886 | u_int scb_index; |
| 887 | |
| 888 | ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD); |
| 889 | while (ahc->qoutfifo[ahc->qoutfifonext] != SCB_LIST_NULL) { |
| 890 | |
| 891 | scb_index = ahc->qoutfifo[ahc->qoutfifonext]; |
| 892 | if ((ahc->qoutfifonext & 0x03) == 0x03) { |
| 893 | u_int modnext; |
| 894 | |
| 895 | /* |
| 896 | * Clear 32bits of QOUTFIFO at a time |
| 897 | * so that we don't clobber an incoming |
| 898 | * byte DMA to the array on architectures |
| 899 | * that only support 32bit load and store |
| 900 | * operations. |
| 901 | */ |
| 902 | modnext = ahc->qoutfifonext & ~0x3; |
| 903 | *((uint32_t *)(&ahc->qoutfifo[modnext])) = 0xFFFFFFFFUL; |
| 904 | ahc_dmamap_sync(ahc, ahc->shared_data_dmat, |
| 905 | ahc->shared_data_dmamap, |
| 906 | /*offset*/modnext, /*len*/4, |
| 907 | BUS_DMASYNC_PREREAD); |
| 908 | } |
| 909 | ahc->qoutfifonext++; |
| 910 | |
| 911 | scb = ahc_lookup_scb(ahc, scb_index); |
| 912 | if (scb == NULL) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 913 | printk("%s: WARNING no command for scb %d " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | "(cmdcmplt)\nQOUTPOS = %d\n", |
| 915 | ahc_name(ahc), scb_index, |
| 916 | (ahc->qoutfifonext - 1) & 0xFF); |
| 917 | continue; |
| 918 | } |
| 919 | |
| 920 | /* |
| 921 | * Save off the residual |
| 922 | * if there is one. |
| 923 | */ |
| 924 | ahc_update_residual(ahc, scb); |
| 925 | ahc_done(ahc, scb); |
| 926 | } |
| 927 | } |
| 928 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 929 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | ahc_run_untagged_queues(struct ahc_softc *ahc) |
| 931 | { |
| 932 | int i; |
| 933 | |
| 934 | for (i = 0; i < 16; i++) |
| 935 | ahc_run_untagged_queue(ahc, &ahc->untagged_queues[i]); |
| 936 | } |
| 937 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 938 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 939 | ahc_run_untagged_queue(struct ahc_softc *ahc, struct scb_tailq *queue) |
| 940 | { |
| 941 | struct scb *scb; |
| 942 | |
| 943 | if (ahc->untagged_queue_lock != 0) |
| 944 | return; |
| 945 | |
| 946 | if ((scb = TAILQ_FIRST(queue)) != NULL |
| 947 | && (scb->flags & SCB_ACTIVE) == 0) { |
| 948 | scb->flags |= SCB_ACTIVE; |
| 949 | ahc_queue_scb(ahc, scb); |
| 950 | } |
| 951 | } |
| 952 | |
| 953 | /************************* Interrupt Handling *********************************/ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 954 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | ahc_handle_brkadrint(struct ahc_softc *ahc) |
| 956 | { |
| 957 | /* |
| 958 | * We upset the sequencer :-( |
| 959 | * Lookup the error message |
| 960 | */ |
| 961 | int i; |
| 962 | int error; |
| 963 | |
| 964 | error = ahc_inb(ahc, ERROR); |
| 965 | for (i = 0; error != 1 && i < num_errors; i++) |
| 966 | error >>= 1; |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 967 | printk("%s: brkadrint, %s at seqaddr = 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | ahc_name(ahc), ahc_hard_errors[i].errmesg, |
| 969 | ahc_inb(ahc, SEQADDR0) | |
| 970 | (ahc_inb(ahc, SEQADDR1) << 8)); |
| 971 | |
| 972 | ahc_dump_card_state(ahc); |
| 973 | |
| 974 | /* Tell everyone that this HBA is no longer available */ |
| 975 | ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, |
| 976 | CAM_LUN_WILDCARD, SCB_LIST_NULL, ROLE_UNKNOWN, |
| 977 | CAM_NO_HBA); |
| 978 | |
| 979 | /* Disable all interrupt sources by resetting the controller */ |
| 980 | ahc_shutdown(ahc); |
| 981 | } |
| 982 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 983 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | ahc_handle_seqint(struct ahc_softc *ahc, u_int intstat) |
| 985 | { |
| 986 | struct scb *scb; |
| 987 | struct ahc_devinfo devinfo; |
| 988 | |
| 989 | ahc_fetch_devinfo(ahc, &devinfo); |
| 990 | |
| 991 | /* |
| 992 | * Clear the upper byte that holds SEQINT status |
| 993 | * codes and clear the SEQINT bit. We will unpause |
| 994 | * the sequencer, if appropriate, after servicing |
| 995 | * the request. |
| 996 | */ |
| 997 | ahc_outb(ahc, CLRINT, CLRSEQINT); |
| 998 | switch (intstat & SEQINT_MASK) { |
| 999 | case BAD_STATUS: |
| 1000 | { |
| 1001 | u_int scb_index; |
| 1002 | struct hardware_scb *hscb; |
| 1003 | |
| 1004 | /* |
| 1005 | * Set the default return value to 0 (don't |
| 1006 | * send sense). The sense code will change |
| 1007 | * this if needed. |
| 1008 | */ |
| 1009 | ahc_outb(ahc, RETURN_1, 0); |
| 1010 | |
| 1011 | /* |
| 1012 | * The sequencer will notify us when a command |
| 1013 | * has an error that would be of interest to |
| 1014 | * the kernel. This allows us to leave the sequencer |
| 1015 | * running in the common case of command completes |
| 1016 | * without error. The sequencer will already have |
| 1017 | * dma'd the SCB back up to us, so we can reference |
| 1018 | * the in kernel copy directly. |
| 1019 | */ |
| 1020 | scb_index = ahc_inb(ahc, SCB_TAG); |
| 1021 | scb = ahc_lookup_scb(ahc, scb_index); |
| 1022 | if (scb == NULL) { |
| 1023 | ahc_print_devinfo(ahc, &devinfo); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1024 | printk("ahc_intr - referenced scb " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | "not valid during seqint 0x%x scb(%d)\n", |
| 1026 | intstat, scb_index); |
| 1027 | ahc_dump_card_state(ahc); |
| 1028 | panic("for safety"); |
| 1029 | goto unpause; |
| 1030 | } |
| 1031 | |
| 1032 | hscb = scb->hscb; |
| 1033 | |
| 1034 | /* Don't want to clobber the original sense code */ |
| 1035 | if ((scb->flags & SCB_SENSE) != 0) { |
| 1036 | /* |
| 1037 | * Clear the SCB_SENSE Flag and have |
| 1038 | * the sequencer do a normal command |
| 1039 | * complete. |
| 1040 | */ |
| 1041 | scb->flags &= ~SCB_SENSE; |
| 1042 | ahc_set_transaction_status(scb, CAM_AUTOSENSE_FAIL); |
| 1043 | break; |
| 1044 | } |
| 1045 | ahc_set_transaction_status(scb, CAM_SCSI_STATUS_ERROR); |
| 1046 | /* Freeze the queue until the client sees the error. */ |
| 1047 | ahc_freeze_devq(ahc, scb); |
| 1048 | ahc_freeze_scb(scb); |
| 1049 | ahc_set_scsi_status(scb, hscb->shared_data.status.scsi_status); |
| 1050 | switch (hscb->shared_data.status.scsi_status) { |
| 1051 | case SCSI_STATUS_OK: |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1052 | printk("%s: Interrupted for staus of 0???\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | ahc_name(ahc)); |
| 1054 | break; |
| 1055 | case SCSI_STATUS_CMD_TERMINATED: |
| 1056 | case SCSI_STATUS_CHECK_COND: |
| 1057 | { |
| 1058 | struct ahc_dma_seg *sg; |
| 1059 | struct scsi_sense *sc; |
| 1060 | struct ahc_initiator_tinfo *targ_info; |
| 1061 | struct ahc_tmode_tstate *tstate; |
| 1062 | struct ahc_transinfo *tinfo; |
| 1063 | #ifdef AHC_DEBUG |
| 1064 | if (ahc_debug & AHC_SHOW_SENSE) { |
| 1065 | ahc_print_path(ahc, scb); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1066 | printk("SCB %d: requests Check Status\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | scb->hscb->tag); |
| 1068 | } |
| 1069 | #endif |
| 1070 | |
| 1071 | if (ahc_perform_autosense(scb) == 0) |
| 1072 | break; |
| 1073 | |
| 1074 | targ_info = ahc_fetch_transinfo(ahc, |
| 1075 | devinfo.channel, |
| 1076 | devinfo.our_scsiid, |
| 1077 | devinfo.target, |
| 1078 | &tstate); |
| 1079 | tinfo = &targ_info->curr; |
| 1080 | sg = scb->sg_list; |
| 1081 | sc = (struct scsi_sense *)(&hscb->shared_data.cdb); |
| 1082 | /* |
| 1083 | * Save off the residual if there is one. |
| 1084 | */ |
| 1085 | ahc_update_residual(ahc, scb); |
| 1086 | #ifdef AHC_DEBUG |
| 1087 | if (ahc_debug & AHC_SHOW_SENSE) { |
| 1088 | ahc_print_path(ahc, scb); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1089 | printk("Sending Sense\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1090 | } |
| 1091 | #endif |
| 1092 | sg->addr = ahc_get_sense_bufaddr(ahc, scb); |
| 1093 | sg->len = ahc_get_sense_bufsize(ahc, scb); |
| 1094 | sg->len |= AHC_DMA_LAST_SEG; |
| 1095 | |
| 1096 | /* Fixup byte order */ |
| 1097 | sg->addr = ahc_htole32(sg->addr); |
| 1098 | sg->len = ahc_htole32(sg->len); |
| 1099 | |
| 1100 | sc->opcode = REQUEST_SENSE; |
| 1101 | sc->byte2 = 0; |
| 1102 | if (tinfo->protocol_version <= SCSI_REV_2 |
| 1103 | && SCB_GET_LUN(scb) < 8) |
| 1104 | sc->byte2 = SCB_GET_LUN(scb) << 5; |
| 1105 | sc->unused[0] = 0; |
| 1106 | sc->unused[1] = 0; |
| 1107 | sc->length = sg->len; |
| 1108 | sc->control = 0; |
| 1109 | |
| 1110 | /* |
| 1111 | * We can't allow the target to disconnect. |
| 1112 | * This will be an untagged transaction and |
| 1113 | * having the target disconnect will make this |
| 1114 | * transaction indestinguishable from outstanding |
| 1115 | * tagged transactions. |
| 1116 | */ |
| 1117 | hscb->control = 0; |
| 1118 | |
| 1119 | /* |
| 1120 | * This request sense could be because the |
| 1121 | * the device lost power or in some other |
| 1122 | * way has lost our transfer negotiations. |
| 1123 | * Renegotiate if appropriate. Unit attention |
| 1124 | * errors will be reported before any data |
| 1125 | * phases occur. |
| 1126 | */ |
| 1127 | if (ahc_get_residual(scb) |
| 1128 | == ahc_get_transfer_length(scb)) { |
| 1129 | ahc_update_neg_request(ahc, &devinfo, |
| 1130 | tstate, targ_info, |
| 1131 | AHC_NEG_IF_NON_ASYNC); |
| 1132 | } |
| 1133 | if (tstate->auto_negotiate & devinfo.target_mask) { |
| 1134 | hscb->control |= MK_MESSAGE; |
| 1135 | scb->flags &= ~SCB_NEGOTIATE; |
| 1136 | scb->flags |= SCB_AUTO_NEGOTIATE; |
| 1137 | } |
| 1138 | hscb->cdb_len = sizeof(*sc); |
| 1139 | hscb->dataptr = sg->addr; |
| 1140 | hscb->datacnt = sg->len; |
| 1141 | hscb->sgptr = scb->sg_list_phys | SG_FULL_RESID; |
| 1142 | hscb->sgptr = ahc_htole32(hscb->sgptr); |
| 1143 | scb->sg_count = 1; |
| 1144 | scb->flags |= SCB_SENSE; |
| 1145 | ahc_qinfifo_requeue_tail(ahc, scb); |
| 1146 | ahc_outb(ahc, RETURN_1, SEND_SENSE); |
| 1147 | /* |
| 1148 | * Ensure we have enough time to actually |
| 1149 | * retrieve the sense. |
| 1150 | */ |
| 1151 | ahc_scb_timer_reset(scb, 5 * 1000000); |
| 1152 | break; |
| 1153 | } |
| 1154 | default: |
| 1155 | break; |
| 1156 | } |
| 1157 | break; |
| 1158 | } |
| 1159 | case NO_MATCH: |
| 1160 | { |
| 1161 | /* Ensure we don't leave the selection hardware on */ |
| 1162 | ahc_outb(ahc, SCSISEQ, |
| 1163 | ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP)); |
| 1164 | |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1165 | printk("%s:%c:%d: no active SCB for reconnecting " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | "target - issuing BUS DEVICE RESET\n", |
| 1167 | ahc_name(ahc), devinfo.channel, devinfo.target); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1168 | printk("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | "ARG_1 == 0x%x ACCUM = 0x%x\n", |
| 1170 | ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN), |
| 1171 | ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM)); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1172 | printk("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | "SINDEX == 0x%x\n", |
| 1174 | ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR), |
| 1175 | ahc_index_busy_tcl(ahc, |
| 1176 | BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID), |
| 1177 | ahc_inb(ahc, SAVED_LUN))), |
| 1178 | ahc_inb(ahc, SINDEX)); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1179 | printk("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n", |
| 1181 | ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID), |
| 1182 | ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG), |
| 1183 | ahc_inb(ahc, SCB_CONTROL)); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1184 | printk("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI)); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1186 | printk("SXFRCTL0 == 0x%x\n", ahc_inb(ahc, SXFRCTL0)); |
| 1187 | printk("SEQCTL == 0x%x\n", ahc_inb(ahc, SEQCTL)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | ahc_dump_card_state(ahc); |
| 1189 | ahc->msgout_buf[0] = MSG_BUS_DEV_RESET; |
| 1190 | ahc->msgout_len = 1; |
| 1191 | ahc->msgout_index = 0; |
| 1192 | ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; |
| 1193 | ahc_outb(ahc, MSG_OUT, HOST_MSG); |
| 1194 | ahc_assert_atn(ahc); |
| 1195 | break; |
| 1196 | } |
| 1197 | case SEND_REJECT: |
| 1198 | { |
| 1199 | u_int rejbyte = ahc_inb(ahc, ACCUM); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1200 | printk("%s:%c:%d: Warning - unknown message received from " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | "target (0x%x). Rejecting\n", |
| 1202 | ahc_name(ahc), devinfo.channel, devinfo.target, rejbyte); |
| 1203 | break; |
| 1204 | } |
| 1205 | case PROTO_VIOLATION: |
| 1206 | { |
| 1207 | ahc_handle_proto_violation(ahc); |
| 1208 | break; |
| 1209 | } |
| 1210 | case IGN_WIDE_RES: |
| 1211 | ahc_handle_ign_wide_residue(ahc, &devinfo); |
| 1212 | break; |
| 1213 | case PDATA_REINIT: |
| 1214 | ahc_reinitialize_dataptrs(ahc); |
| 1215 | break; |
| 1216 | case BAD_PHASE: |
| 1217 | { |
| 1218 | u_int lastphase; |
| 1219 | |
| 1220 | lastphase = ahc_inb(ahc, LASTPHASE); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1221 | printk("%s:%c:%d: unknown scsi bus phase %x, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | "lastphase = 0x%x. Attempting to continue\n", |
| 1223 | ahc_name(ahc), devinfo.channel, devinfo.target, |
| 1224 | lastphase, ahc_inb(ahc, SCSISIGI)); |
| 1225 | break; |
| 1226 | } |
| 1227 | case MISSED_BUSFREE: |
| 1228 | { |
| 1229 | u_int lastphase; |
| 1230 | |
| 1231 | lastphase = ahc_inb(ahc, LASTPHASE); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1232 | printk("%s:%c:%d: Missed busfree. " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | "Lastphase = 0x%x, Curphase = 0x%x\n", |
| 1234 | ahc_name(ahc), devinfo.channel, devinfo.target, |
| 1235 | lastphase, ahc_inb(ahc, SCSISIGI)); |
| 1236 | ahc_restart(ahc); |
| 1237 | return; |
| 1238 | } |
| 1239 | case HOST_MSG_LOOP: |
| 1240 | { |
| 1241 | /* |
| 1242 | * The sequencer has encountered a message phase |
| 1243 | * that requires host assistance for completion. |
| 1244 | * While handling the message phase(s), we will be |
| 1245 | * notified by the sequencer after each byte is |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1246 | * transferred so we can track bus phase changes. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | * |
| 1248 | * If this is the first time we've seen a HOST_MSG_LOOP |
| 1249 | * interrupt, initialize the state of the host message |
| 1250 | * loop. |
| 1251 | */ |
| 1252 | if (ahc->msg_type == MSG_TYPE_NONE) { |
| 1253 | struct scb *scb; |
| 1254 | u_int scb_index; |
| 1255 | u_int bus_phase; |
| 1256 | |
| 1257 | bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; |
| 1258 | if (bus_phase != P_MESGIN |
| 1259 | && bus_phase != P_MESGOUT) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1260 | printk("ahc_intr: HOST_MSG_LOOP bad " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | "phase 0x%x\n", |
| 1262 | bus_phase); |
| 1263 | /* |
| 1264 | * Probably transitioned to bus free before |
| 1265 | * we got here. Just punt the message. |
| 1266 | */ |
| 1267 | ahc_clear_intstat(ahc); |
| 1268 | ahc_restart(ahc); |
| 1269 | return; |
| 1270 | } |
| 1271 | |
| 1272 | scb_index = ahc_inb(ahc, SCB_TAG); |
| 1273 | scb = ahc_lookup_scb(ahc, scb_index); |
| 1274 | if (devinfo.role == ROLE_INITIATOR) { |
James Bottomley | 5e2f22d | 2008-02-12 15:55:48 -0600 | [diff] [blame] | 1275 | if (bus_phase == P_MESGOUT) { |
| 1276 | if (scb == NULL) |
| 1277 | panic("HOST_MSG_LOOP with " |
| 1278 | "invalid SCB %x\n", |
| 1279 | scb_index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | ahc_setup_initiator_msgout(ahc, |
| 1282 | &devinfo, |
| 1283 | scb); |
James Bottomley | 5e2f22d | 2008-02-12 15:55:48 -0600 | [diff] [blame] | 1284 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | ahc->msg_type = |
| 1286 | MSG_TYPE_INITIATOR_MSGIN; |
| 1287 | ahc->msgin_index = 0; |
| 1288 | } |
| 1289 | } |
| 1290 | #ifdef AHC_TARGET_MODE |
| 1291 | else { |
| 1292 | if (bus_phase == P_MESGOUT) { |
| 1293 | ahc->msg_type = |
| 1294 | MSG_TYPE_TARGET_MSGOUT; |
| 1295 | ahc->msgin_index = 0; |
| 1296 | } |
| 1297 | else |
| 1298 | ahc_setup_target_msgin(ahc, |
| 1299 | &devinfo, |
| 1300 | scb); |
| 1301 | } |
| 1302 | #endif |
| 1303 | } |
| 1304 | |
| 1305 | ahc_handle_message_phase(ahc); |
| 1306 | break; |
| 1307 | } |
| 1308 | case PERR_DETECTED: |
| 1309 | { |
| 1310 | /* |
| 1311 | * If we've cleared the parity error interrupt |
| 1312 | * but the sequencer still believes that SCSIPERR |
| 1313 | * is true, it must be that the parity error is |
| 1314 | * for the currently presented byte on the bus, |
| 1315 | * and we are not in a phase (data-in) where we will |
| 1316 | * eventually ack this byte. Ack the byte and |
| 1317 | * throw it away in the hope that the target will |
| 1318 | * take us to message out to deliver the appropriate |
| 1319 | * error message. |
| 1320 | */ |
| 1321 | if ((intstat & SCSIINT) == 0 |
| 1322 | && (ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0) { |
| 1323 | |
| 1324 | if ((ahc->features & AHC_DT) == 0) { |
| 1325 | u_int curphase; |
| 1326 | |
| 1327 | /* |
| 1328 | * The hardware will only let you ack bytes |
| 1329 | * if the expected phase in SCSISIGO matches |
| 1330 | * the current phase. Make sure this is |
| 1331 | * currently the case. |
| 1332 | */ |
| 1333 | curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; |
| 1334 | ahc_outb(ahc, LASTPHASE, curphase); |
| 1335 | ahc_outb(ahc, SCSISIGO, curphase); |
| 1336 | } |
| 1337 | if ((ahc_inb(ahc, SCSISIGI) & (CDI|MSGI)) == 0) { |
| 1338 | int wait; |
| 1339 | |
| 1340 | /* |
| 1341 | * In a data phase. Faster to bitbucket |
| 1342 | * the data than to individually ack each |
| 1343 | * byte. This is also the only strategy |
| 1344 | * that will work with AUTOACK enabled. |
| 1345 | */ |
| 1346 | ahc_outb(ahc, SXFRCTL1, |
| 1347 | ahc_inb(ahc, SXFRCTL1) | BITBUCKET); |
| 1348 | wait = 5000; |
| 1349 | while (--wait != 0) { |
| 1350 | if ((ahc_inb(ahc, SCSISIGI) |
| 1351 | & (CDI|MSGI)) != 0) |
| 1352 | break; |
| 1353 | ahc_delay(100); |
| 1354 | } |
| 1355 | ahc_outb(ahc, SXFRCTL1, |
| 1356 | ahc_inb(ahc, SXFRCTL1) & ~BITBUCKET); |
| 1357 | if (wait == 0) { |
| 1358 | struct scb *scb; |
| 1359 | u_int scb_index; |
| 1360 | |
| 1361 | ahc_print_devinfo(ahc, &devinfo); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1362 | printk("Unable to clear parity error. " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | "Resetting bus.\n"); |
| 1364 | scb_index = ahc_inb(ahc, SCB_TAG); |
| 1365 | scb = ahc_lookup_scb(ahc, scb_index); |
| 1366 | if (scb != NULL) |
| 1367 | ahc_set_transaction_status(scb, |
| 1368 | CAM_UNCOR_PARITY); |
| 1369 | ahc_reset_channel(ahc, devinfo.channel, |
| 1370 | /*init reset*/TRUE); |
| 1371 | } |
| 1372 | } else { |
| 1373 | ahc_inb(ahc, SCSIDATL); |
| 1374 | } |
| 1375 | } |
| 1376 | break; |
| 1377 | } |
| 1378 | case DATA_OVERRUN: |
| 1379 | { |
| 1380 | /* |
| 1381 | * When the sequencer detects an overrun, it |
| 1382 | * places the controller in "BITBUCKET" mode |
| 1383 | * and allows the target to complete its transfer. |
| 1384 | * Unfortunately, none of the counters get updated |
| 1385 | * when the controller is in this mode, so we have |
| 1386 | * no way of knowing how large the overrun was. |
| 1387 | */ |
| 1388 | u_int scbindex = ahc_inb(ahc, SCB_TAG); |
| 1389 | u_int lastphase = ahc_inb(ahc, LASTPHASE); |
| 1390 | u_int i; |
| 1391 | |
| 1392 | scb = ahc_lookup_scb(ahc, scbindex); |
| 1393 | for (i = 0; i < num_phases; i++) { |
| 1394 | if (lastphase == ahc_phase_table[i].phase) |
| 1395 | break; |
| 1396 | } |
| 1397 | ahc_print_path(ahc, scb); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1398 | printk("data overrun detected %s." |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | " Tag == 0x%x.\n", |
| 1400 | ahc_phase_table[i].phasemsg, |
| 1401 | scb->hscb->tag); |
| 1402 | ahc_print_path(ahc, scb); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1403 | printk("%s seen Data Phase. Length = %ld. NumSGs = %d.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | ahc_inb(ahc, SEQ_FLAGS) & DPHASE ? "Have" : "Haven't", |
| 1405 | ahc_get_transfer_length(scb), scb->sg_count); |
| 1406 | if (scb->sg_count > 0) { |
| 1407 | for (i = 0; i < scb->sg_count; i++) { |
| 1408 | |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1409 | printk("sg[%d] - Addr 0x%x%x : Length %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | i, |
| 1411 | (ahc_le32toh(scb->sg_list[i].len) >> 24 |
| 1412 | & SG_HIGH_ADDR_BITS), |
| 1413 | ahc_le32toh(scb->sg_list[i].addr), |
| 1414 | ahc_le32toh(scb->sg_list[i].len) |
| 1415 | & AHC_SG_LEN_MASK); |
| 1416 | } |
| 1417 | } |
| 1418 | /* |
| 1419 | * Set this and it will take effect when the |
| 1420 | * target does a command complete. |
| 1421 | */ |
| 1422 | ahc_freeze_devq(ahc, scb); |
| 1423 | if ((scb->flags & SCB_SENSE) == 0) { |
| 1424 | ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); |
| 1425 | } else { |
| 1426 | scb->flags &= ~SCB_SENSE; |
| 1427 | ahc_set_transaction_status(scb, CAM_AUTOSENSE_FAIL); |
| 1428 | } |
| 1429 | ahc_freeze_scb(scb); |
| 1430 | |
| 1431 | if ((ahc->features & AHC_ULTRA2) != 0) { |
| 1432 | /* |
| 1433 | * Clear the channel in case we return |
| 1434 | * to data phase later. |
| 1435 | */ |
| 1436 | ahc_outb(ahc, SXFRCTL0, |
| 1437 | ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN); |
| 1438 | ahc_outb(ahc, SXFRCTL0, |
| 1439 | ahc_inb(ahc, SXFRCTL0) | CLRSTCNT|CLRCHN); |
| 1440 | } |
| 1441 | if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) { |
| 1442 | u_int dscommand1; |
| 1443 | |
| 1444 | /* Ensure HHADDR is 0 for future DMA operations. */ |
| 1445 | dscommand1 = ahc_inb(ahc, DSCOMMAND1); |
| 1446 | ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0); |
| 1447 | ahc_outb(ahc, HADDR, 0); |
| 1448 | ahc_outb(ahc, DSCOMMAND1, dscommand1); |
| 1449 | } |
| 1450 | break; |
| 1451 | } |
| 1452 | case MKMSG_FAILED: |
| 1453 | { |
| 1454 | u_int scbindex; |
| 1455 | |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1456 | printk("%s:%c:%d:%d: Attempt to issue message failed\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | ahc_name(ahc), devinfo.channel, devinfo.target, |
| 1458 | devinfo.lun); |
| 1459 | scbindex = ahc_inb(ahc, SCB_TAG); |
| 1460 | scb = ahc_lookup_scb(ahc, scbindex); |
| 1461 | if (scb != NULL |
| 1462 | && (scb->flags & SCB_RECOVERY_SCB) != 0) |
| 1463 | /* |
| 1464 | * Ensure that we didn't put a second instance of this |
| 1465 | * SCB into the QINFIFO. |
| 1466 | */ |
| 1467 | ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb), |
| 1468 | SCB_GET_CHANNEL(ahc, scb), |
| 1469 | SCB_GET_LUN(scb), scb->hscb->tag, |
| 1470 | ROLE_INITIATOR, /*status*/0, |
| 1471 | SEARCH_REMOVE); |
| 1472 | break; |
| 1473 | } |
| 1474 | case NO_FREE_SCB: |
| 1475 | { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1476 | printk("%s: No free or disconnected SCBs\n", ahc_name(ahc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | ahc_dump_card_state(ahc); |
| 1478 | panic("for safety"); |
| 1479 | break; |
| 1480 | } |
| 1481 | case SCB_MISMATCH: |
| 1482 | { |
| 1483 | u_int scbptr; |
| 1484 | |
| 1485 | scbptr = ahc_inb(ahc, SCBPTR); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1486 | printk("Bogus TAG after DMA. SCBPTR %d, tag %d, our tag %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | scbptr, ahc_inb(ahc, ARG_1), |
| 1488 | ahc->scb_data->hscbs[scbptr].tag); |
| 1489 | ahc_dump_card_state(ahc); |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1490 | panic("for safety"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | break; |
| 1492 | } |
| 1493 | case OUT_OF_RANGE: |
| 1494 | { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1495 | printk("%s: BTT calculation out of range\n", ahc_name(ahc)); |
| 1496 | printk("SAVED_SCSIID == 0x%x, SAVED_LUN == 0x%x, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | "ARG_1 == 0x%x ACCUM = 0x%x\n", |
| 1498 | ahc_inb(ahc, SAVED_SCSIID), ahc_inb(ahc, SAVED_LUN), |
| 1499 | ahc_inb(ahc, ARG_1), ahc_inb(ahc, ACCUM)); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1500 | printk("SEQ_FLAGS == 0x%x, SCBPTR == 0x%x, BTT == 0x%x, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | "SINDEX == 0x%x\n, A == 0x%x\n", |
| 1502 | ahc_inb(ahc, SEQ_FLAGS), ahc_inb(ahc, SCBPTR), |
| 1503 | ahc_index_busy_tcl(ahc, |
| 1504 | BUILD_TCL(ahc_inb(ahc, SAVED_SCSIID), |
| 1505 | ahc_inb(ahc, SAVED_LUN))), |
| 1506 | ahc_inb(ahc, SINDEX), |
| 1507 | ahc_inb(ahc, ACCUM)); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1508 | printk("SCSIID == 0x%x, SCB_SCSIID == 0x%x, SCB_LUN == 0x%x, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | "SCB_TAG == 0x%x, SCB_CONTROL == 0x%x\n", |
| 1510 | ahc_inb(ahc, SCSIID), ahc_inb(ahc, SCB_SCSIID), |
| 1511 | ahc_inb(ahc, SCB_LUN), ahc_inb(ahc, SCB_TAG), |
| 1512 | ahc_inb(ahc, SCB_CONTROL)); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1513 | printk("SCSIBUSL == 0x%x, SCSISIGI == 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | ahc_inb(ahc, SCSIBUSL), ahc_inb(ahc, SCSISIGI)); |
| 1515 | ahc_dump_card_state(ahc); |
| 1516 | panic("for safety"); |
| 1517 | break; |
| 1518 | } |
| 1519 | default: |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1520 | printk("ahc_intr: seqint, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | "intstat == 0x%x, scsisigi = 0x%x\n", |
| 1522 | intstat, ahc_inb(ahc, SCSISIGI)); |
| 1523 | break; |
| 1524 | } |
| 1525 | unpause: |
| 1526 | /* |
| 1527 | * The sequencer is paused immediately on |
| 1528 | * a SEQINT, so we should restart it when |
| 1529 | * we're done. |
| 1530 | */ |
| 1531 | ahc_unpause(ahc); |
| 1532 | } |
| 1533 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 1534 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | ahc_handle_scsiint(struct ahc_softc *ahc, u_int intstat) |
| 1536 | { |
| 1537 | u_int scb_index; |
| 1538 | u_int status0; |
| 1539 | u_int status; |
| 1540 | struct scb *scb; |
| 1541 | char cur_channel; |
| 1542 | char intr_channel; |
| 1543 | |
| 1544 | if ((ahc->features & AHC_TWIN) != 0 |
| 1545 | && ((ahc_inb(ahc, SBLKCTL) & SELBUSB) != 0)) |
| 1546 | cur_channel = 'B'; |
| 1547 | else |
| 1548 | cur_channel = 'A'; |
| 1549 | intr_channel = cur_channel; |
| 1550 | |
| 1551 | if ((ahc->features & AHC_ULTRA2) != 0) |
| 1552 | status0 = ahc_inb(ahc, SSTAT0) & IOERR; |
| 1553 | else |
| 1554 | status0 = 0; |
| 1555 | status = ahc_inb(ahc, SSTAT1) & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR); |
| 1556 | if (status == 0 && status0 == 0) { |
| 1557 | if ((ahc->features & AHC_TWIN) != 0) { |
| 1558 | /* Try the other channel */ |
| 1559 | ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB); |
| 1560 | status = ahc_inb(ahc, SSTAT1) |
| 1561 | & (SELTO|SCSIRSTI|BUSFREE|SCSIPERR); |
| 1562 | intr_channel = (cur_channel == 'A') ? 'B' : 'A'; |
| 1563 | } |
| 1564 | if (status == 0) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1565 | printk("%s: Spurious SCSI interrupt\n", ahc_name(ahc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1566 | ahc_outb(ahc, CLRINT, CLRSCSIINT); |
| 1567 | ahc_unpause(ahc); |
| 1568 | return; |
| 1569 | } |
| 1570 | } |
| 1571 | |
| 1572 | /* Make sure the sequencer is in a safe location. */ |
| 1573 | ahc_clear_critical_section(ahc); |
| 1574 | |
| 1575 | scb_index = ahc_inb(ahc, SCB_TAG); |
| 1576 | scb = ahc_lookup_scb(ahc, scb_index); |
| 1577 | if (scb != NULL |
| 1578 | && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) != 0) |
| 1579 | scb = NULL; |
| 1580 | |
| 1581 | if ((ahc->features & AHC_ULTRA2) != 0 |
| 1582 | && (status0 & IOERR) != 0) { |
| 1583 | int now_lvd; |
| 1584 | |
| 1585 | now_lvd = ahc_inb(ahc, SBLKCTL) & ENAB40; |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1586 | printk("%s: Transceiver State Has Changed to %s mode\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | ahc_name(ahc), now_lvd ? "LVD" : "SE"); |
| 1588 | ahc_outb(ahc, CLRSINT0, CLRIOERR); |
| 1589 | /* |
| 1590 | * When transitioning to SE mode, the reset line |
| 1591 | * glitches, triggering an arbitration bug in some |
| 1592 | * Ultra2 controllers. This bug is cleared when we |
| 1593 | * assert the reset line. Since a reset glitch has |
| 1594 | * already occurred with this transition and a |
| 1595 | * transceiver state change is handled just like |
| 1596 | * a bus reset anyway, asserting the reset line |
| 1597 | * ourselves is safe. |
| 1598 | */ |
| 1599 | ahc_reset_channel(ahc, intr_channel, |
| 1600 | /*Initiate Reset*/now_lvd == 0); |
| 1601 | } else if ((status & SCSIRSTI) != 0) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1602 | printk("%s: Someone reset channel %c\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1603 | ahc_name(ahc), intr_channel); |
| 1604 | if (intr_channel != cur_channel) |
| 1605 | ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) ^ SELBUSB); |
| 1606 | ahc_reset_channel(ahc, intr_channel, /*Initiate Reset*/FALSE); |
| 1607 | } else if ((status & SCSIPERR) != 0) { |
| 1608 | /* |
| 1609 | * Determine the bus phase and queue an appropriate message. |
| 1610 | * SCSIPERR is latched true as soon as a parity error |
| 1611 | * occurs. If the sequencer acked the transfer that |
| 1612 | * caused the parity error and the currently presented |
| 1613 | * transfer on the bus has correct parity, SCSIPERR will |
| 1614 | * be cleared by CLRSCSIPERR. Use this to determine if |
| 1615 | * we should look at the last phase the sequencer recorded, |
| 1616 | * or the current phase presented on the bus. |
| 1617 | */ |
| 1618 | struct ahc_devinfo devinfo; |
| 1619 | u_int mesg_out; |
| 1620 | u_int curphase; |
| 1621 | u_int errorphase; |
| 1622 | u_int lastphase; |
| 1623 | u_int scsirate; |
| 1624 | u_int i; |
| 1625 | u_int sstat2; |
| 1626 | int silent; |
| 1627 | |
| 1628 | lastphase = ahc_inb(ahc, LASTPHASE); |
| 1629 | curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; |
| 1630 | sstat2 = ahc_inb(ahc, SSTAT2); |
| 1631 | ahc_outb(ahc, CLRSINT1, CLRSCSIPERR); |
| 1632 | /* |
| 1633 | * For all phases save DATA, the sequencer won't |
| 1634 | * automatically ack a byte that has a parity error |
| 1635 | * in it. So the only way that the current phase |
| 1636 | * could be 'data-in' is if the parity error is for |
| 1637 | * an already acked byte in the data phase. During |
| 1638 | * synchronous data-in transfers, we may actually |
| 1639 | * ack bytes before latching the current phase in |
| 1640 | * LASTPHASE, leading to the discrepancy between |
| 1641 | * curphase and lastphase. |
| 1642 | */ |
| 1643 | if ((ahc_inb(ahc, SSTAT1) & SCSIPERR) != 0 |
| 1644 | || curphase == P_DATAIN || curphase == P_DATAIN_DT) |
| 1645 | errorphase = curphase; |
| 1646 | else |
| 1647 | errorphase = lastphase; |
| 1648 | |
| 1649 | for (i = 0; i < num_phases; i++) { |
| 1650 | if (errorphase == ahc_phase_table[i].phase) |
| 1651 | break; |
| 1652 | } |
| 1653 | mesg_out = ahc_phase_table[i].mesg_out; |
| 1654 | silent = FALSE; |
| 1655 | if (scb != NULL) { |
| 1656 | if (SCB_IS_SILENT(scb)) |
| 1657 | silent = TRUE; |
| 1658 | else |
| 1659 | ahc_print_path(ahc, scb); |
| 1660 | scb->flags |= SCB_TRANSMISSION_ERROR; |
| 1661 | } else |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1662 | printk("%s:%c:%d: ", ahc_name(ahc), intr_channel, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1663 | SCSIID_TARGET(ahc, ahc_inb(ahc, SAVED_SCSIID))); |
| 1664 | scsirate = ahc_inb(ahc, SCSIRATE); |
| 1665 | if (silent == FALSE) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1666 | printk("parity error detected %s. " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1667 | "SEQADDR(0x%x) SCSIRATE(0x%x)\n", |
| 1668 | ahc_phase_table[i].phasemsg, |
| 1669 | ahc_inw(ahc, SEQADDR0), |
| 1670 | scsirate); |
| 1671 | if ((ahc->features & AHC_DT) != 0) { |
| 1672 | if ((sstat2 & CRCVALERR) != 0) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1673 | printk("\tCRC Value Mismatch\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | if ((sstat2 & CRCENDERR) != 0) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1675 | printk("\tNo terminal CRC packet " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | "recevied\n"); |
| 1677 | if ((sstat2 & CRCREQERR) != 0) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1678 | printk("\tIllegal CRC packet " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | "request\n"); |
| 1680 | if ((sstat2 & DUAL_EDGE_ERR) != 0) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1681 | printk("\tUnexpected %sDT Data Phase\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | (scsirate & SINGLE_EDGE) |
| 1683 | ? "" : "non-"); |
| 1684 | } |
| 1685 | } |
| 1686 | |
| 1687 | if ((ahc->features & AHC_DT) != 0 |
| 1688 | && (sstat2 & DUAL_EDGE_ERR) != 0) { |
| 1689 | /* |
| 1690 | * This error applies regardless of |
| 1691 | * data direction, so ignore the value |
| 1692 | * in the phase table. |
| 1693 | */ |
| 1694 | mesg_out = MSG_INITIATOR_DET_ERR; |
| 1695 | } |
| 1696 | |
| 1697 | /* |
| 1698 | * We've set the hardware to assert ATN if we |
| 1699 | * get a parity error on "in" phases, so all we |
| 1700 | * need to do is stuff the message buffer with |
| 1701 | * the appropriate message. "In" phases have set |
| 1702 | * mesg_out to something other than MSG_NOP. |
| 1703 | */ |
| 1704 | if (mesg_out != MSG_NOOP) { |
| 1705 | if (ahc->msg_type != MSG_TYPE_NONE) |
| 1706 | ahc->send_msg_perror = TRUE; |
| 1707 | else |
| 1708 | ahc_outb(ahc, MSG_OUT, mesg_out); |
| 1709 | } |
| 1710 | /* |
| 1711 | * Force a renegotiation with this target just in |
| 1712 | * case we are out of sync for some external reason |
| 1713 | * unknown (or unreported) by the target. |
| 1714 | */ |
| 1715 | ahc_fetch_devinfo(ahc, &devinfo); |
| 1716 | ahc_force_renegotiation(ahc, &devinfo); |
| 1717 | |
| 1718 | ahc_outb(ahc, CLRINT, CLRSCSIINT); |
| 1719 | ahc_unpause(ahc); |
| 1720 | } else if ((status & SELTO) != 0) { |
| 1721 | u_int scbptr; |
| 1722 | |
| 1723 | /* Stop the selection */ |
| 1724 | ahc_outb(ahc, SCSISEQ, 0); |
| 1725 | |
| 1726 | /* No more pending messages */ |
| 1727 | ahc_clear_msg_state(ahc); |
| 1728 | |
| 1729 | /* Clear interrupt state */ |
| 1730 | ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE); |
| 1731 | ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRBUSFREE|CLRSCSIPERR); |
| 1732 | |
| 1733 | /* |
| 1734 | * Although the driver does not care about the |
| 1735 | * 'Selection in Progress' status bit, the busy |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1736 | * LED does. SELINGO is only cleared by a successful |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | * selection, so we must manually clear it to insure |
| 1738 | * the LED turns off just incase no future successful |
| 1739 | * selections occur (e.g. no devices on the bus). |
| 1740 | */ |
| 1741 | ahc_outb(ahc, CLRSINT0, CLRSELINGO); |
| 1742 | |
| 1743 | scbptr = ahc_inb(ahc, WAITING_SCBH); |
| 1744 | ahc_outb(ahc, SCBPTR, scbptr); |
| 1745 | scb_index = ahc_inb(ahc, SCB_TAG); |
| 1746 | |
| 1747 | scb = ahc_lookup_scb(ahc, scb_index); |
| 1748 | if (scb == NULL) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1749 | printk("%s: ahc_intr - referenced scb not " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | "valid during SELTO scb(%d, %d)\n", |
| 1751 | ahc_name(ahc), scbptr, scb_index); |
| 1752 | ahc_dump_card_state(ahc); |
| 1753 | } else { |
| 1754 | struct ahc_devinfo devinfo; |
| 1755 | #ifdef AHC_DEBUG |
| 1756 | if ((ahc_debug & AHC_SHOW_SELTO) != 0) { |
| 1757 | ahc_print_path(ahc, scb); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1758 | printk("Saw Selection Timeout for SCB 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1759 | scb_index); |
| 1760 | } |
| 1761 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | ahc_scb_devinfo(ahc, &devinfo, scb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | ahc_set_transaction_status(scb, CAM_SEL_TIMEOUT); |
| 1764 | ahc_freeze_devq(ahc, scb); |
James Bottomley | 79778a2 | 2005-08-04 17:33:22 -0500 | [diff] [blame] | 1765 | |
| 1766 | /* |
| 1767 | * Cancel any pending transactions on the device |
| 1768 | * now that it seems to be missing. This will |
| 1769 | * also revert us to async/narrow transfers until |
| 1770 | * we can renegotiate with the device. |
| 1771 | */ |
| 1772 | ahc_handle_devreset(ahc, &devinfo, |
| 1773 | CAM_SEL_TIMEOUT, |
| 1774 | "Selection Timeout", |
| 1775 | /*verbose_level*/1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | } |
| 1777 | ahc_outb(ahc, CLRINT, CLRSCSIINT); |
| 1778 | ahc_restart(ahc); |
| 1779 | } else if ((status & BUSFREE) != 0 |
| 1780 | && (ahc_inb(ahc, SIMODE1) & ENBUSFREE) != 0) { |
| 1781 | struct ahc_devinfo devinfo; |
| 1782 | u_int lastphase; |
| 1783 | u_int saved_scsiid; |
| 1784 | u_int saved_lun; |
| 1785 | u_int target; |
| 1786 | u_int initiator_role_id; |
| 1787 | char channel; |
| 1788 | int printerror; |
| 1789 | |
| 1790 | /* |
| 1791 | * Clear our selection hardware as soon as possible. |
| 1792 | * We may have an entry in the waiting Q for this target, |
| 1793 | * that is affected by this busfree and we don't want to |
| 1794 | * go about selecting the target while we handle the event. |
| 1795 | */ |
| 1796 | ahc_outb(ahc, SCSISEQ, |
| 1797 | ahc_inb(ahc, SCSISEQ) & (ENSELI|ENRSELI|ENAUTOATNP)); |
| 1798 | |
| 1799 | /* |
| 1800 | * Disable busfree interrupts and clear the busfree |
| 1801 | * interrupt status. We do this here so that several |
| 1802 | * bus transactions occur prior to clearing the SCSIINT |
| 1803 | * latch. It can take a bit for the clearing to take effect. |
| 1804 | */ |
| 1805 | ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENBUSFREE); |
| 1806 | ahc_outb(ahc, CLRSINT1, CLRBUSFREE|CLRSCSIPERR); |
| 1807 | |
| 1808 | /* |
| 1809 | * Look at what phase we were last in. |
| 1810 | * If its message out, chances are pretty good |
| 1811 | * that the busfree was in response to one of |
| 1812 | * our abort requests. |
| 1813 | */ |
| 1814 | lastphase = ahc_inb(ahc, LASTPHASE); |
| 1815 | saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); |
| 1816 | saved_lun = ahc_inb(ahc, SAVED_LUN); |
| 1817 | target = SCSIID_TARGET(ahc, saved_scsiid); |
| 1818 | initiator_role_id = SCSIID_OUR_ID(saved_scsiid); |
| 1819 | channel = SCSIID_CHANNEL(ahc, saved_scsiid); |
| 1820 | ahc_compile_devinfo(&devinfo, initiator_role_id, |
| 1821 | target, saved_lun, channel, ROLE_INITIATOR); |
| 1822 | printerror = 1; |
| 1823 | |
| 1824 | if (lastphase == P_MESGOUT) { |
| 1825 | u_int tag; |
| 1826 | |
| 1827 | tag = SCB_LIST_NULL; |
| 1828 | if (ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT_TAG, TRUE) |
| 1829 | || ahc_sent_msg(ahc, AHCMSG_1B, MSG_ABORT, TRUE)) { |
| 1830 | if (ahc->msgout_buf[ahc->msgout_index - 1] |
| 1831 | == MSG_ABORT_TAG) |
| 1832 | tag = scb->hscb->tag; |
| 1833 | ahc_print_path(ahc, scb); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1834 | printk("SCB %d - Abort%s Completed.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | scb->hscb->tag, tag == SCB_LIST_NULL ? |
| 1836 | "" : " Tag"); |
| 1837 | ahc_abort_scbs(ahc, target, channel, |
| 1838 | saved_lun, tag, |
| 1839 | ROLE_INITIATOR, |
| 1840 | CAM_REQ_ABORTED); |
| 1841 | printerror = 0; |
| 1842 | } else if (ahc_sent_msg(ahc, AHCMSG_1B, |
| 1843 | MSG_BUS_DEV_RESET, TRUE)) { |
| 1844 | #ifdef __FreeBSD__ |
| 1845 | /* |
| 1846 | * Don't mark the user's request for this BDR |
| 1847 | * as completing with CAM_BDR_SENT. CAM3 |
| 1848 | * specifies CAM_REQ_CMP. |
| 1849 | */ |
| 1850 | if (scb != NULL |
| 1851 | && scb->io_ctx->ccb_h.func_code== XPT_RESET_DEV |
| 1852 | && ahc_match_scb(ahc, scb, target, channel, |
| 1853 | CAM_LUN_WILDCARD, |
| 1854 | SCB_LIST_NULL, |
| 1855 | ROLE_INITIATOR)) { |
| 1856 | ahc_set_transaction_status(scb, CAM_REQ_CMP); |
| 1857 | } |
| 1858 | #endif |
| 1859 | ahc_compile_devinfo(&devinfo, |
| 1860 | initiator_role_id, |
| 1861 | target, |
| 1862 | CAM_LUN_WILDCARD, |
| 1863 | channel, |
| 1864 | ROLE_INITIATOR); |
| 1865 | ahc_handle_devreset(ahc, &devinfo, |
| 1866 | CAM_BDR_SENT, |
| 1867 | "Bus Device Reset", |
| 1868 | /*verbose_level*/0); |
| 1869 | printerror = 0; |
| 1870 | } else if (ahc_sent_msg(ahc, AHCMSG_EXT, |
| 1871 | MSG_EXT_PPR, FALSE)) { |
| 1872 | struct ahc_initiator_tinfo *tinfo; |
| 1873 | struct ahc_tmode_tstate *tstate; |
| 1874 | |
| 1875 | /* |
| 1876 | * PPR Rejected. Try non-ppr negotiation |
| 1877 | * and retry command. |
| 1878 | */ |
| 1879 | tinfo = ahc_fetch_transinfo(ahc, |
| 1880 | devinfo.channel, |
| 1881 | devinfo.our_scsiid, |
| 1882 | devinfo.target, |
| 1883 | &tstate); |
| 1884 | tinfo->curr.transport_version = 2; |
| 1885 | tinfo->goal.transport_version = 2; |
| 1886 | tinfo->goal.ppr_options = 0; |
| 1887 | ahc_qinfifo_requeue_tail(ahc, scb); |
| 1888 | printerror = 0; |
| 1889 | } else if (ahc_sent_msg(ahc, AHCMSG_EXT, |
| 1890 | MSG_EXT_WDTR, FALSE)) { |
| 1891 | /* |
| 1892 | * Negotiation Rejected. Go-narrow and |
| 1893 | * retry command. |
| 1894 | */ |
| 1895 | ahc_set_width(ahc, &devinfo, |
| 1896 | MSG_EXT_WDTR_BUS_8_BIT, |
| 1897 | AHC_TRANS_CUR|AHC_TRANS_GOAL, |
| 1898 | /*paused*/TRUE); |
| 1899 | ahc_qinfifo_requeue_tail(ahc, scb); |
| 1900 | printerror = 0; |
| 1901 | } else if (ahc_sent_msg(ahc, AHCMSG_EXT, |
| 1902 | MSG_EXT_SDTR, FALSE)) { |
| 1903 | /* |
| 1904 | * Negotiation Rejected. Go-async and |
| 1905 | * retry command. |
| 1906 | */ |
| 1907 | ahc_set_syncrate(ahc, &devinfo, |
| 1908 | /*syncrate*/NULL, |
| 1909 | /*period*/0, /*offset*/0, |
| 1910 | /*ppr_options*/0, |
| 1911 | AHC_TRANS_CUR|AHC_TRANS_GOAL, |
| 1912 | /*paused*/TRUE); |
| 1913 | ahc_qinfifo_requeue_tail(ahc, scb); |
| 1914 | printerror = 0; |
| 1915 | } |
| 1916 | } |
| 1917 | if (printerror != 0) { |
| 1918 | u_int i; |
| 1919 | |
| 1920 | if (scb != NULL) { |
| 1921 | u_int tag; |
| 1922 | |
| 1923 | if ((scb->hscb->control & TAG_ENB) != 0) |
| 1924 | tag = scb->hscb->tag; |
| 1925 | else |
| 1926 | tag = SCB_LIST_NULL; |
| 1927 | ahc_print_path(ahc, scb); |
| 1928 | ahc_abort_scbs(ahc, target, channel, |
| 1929 | SCB_GET_LUN(scb), tag, |
| 1930 | ROLE_INITIATOR, |
| 1931 | CAM_UNEXP_BUSFREE); |
| 1932 | } else { |
| 1933 | /* |
| 1934 | * We had not fully identified this connection, |
| 1935 | * so we cannot abort anything. |
| 1936 | */ |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1937 | printk("%s: ", ahc_name(ahc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1938 | } |
| 1939 | for (i = 0; i < num_phases; i++) { |
| 1940 | if (lastphase == ahc_phase_table[i].phase) |
| 1941 | break; |
| 1942 | } |
| 1943 | if (lastphase != P_BUSFREE) { |
| 1944 | /* |
| 1945 | * Renegotiate with this device at the |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1946 | * next opportunity just in case this busfree |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | * is due to a negotiation mismatch with the |
| 1948 | * device. |
| 1949 | */ |
| 1950 | ahc_force_renegotiation(ahc, &devinfo); |
| 1951 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1952 | printk("Unexpected busfree %s\n" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | "SEQADDR == 0x%x\n", |
| 1954 | ahc_phase_table[i].phasemsg, |
| 1955 | ahc_inb(ahc, SEQADDR0) |
| 1956 | | (ahc_inb(ahc, SEQADDR1) << 8)); |
| 1957 | } |
| 1958 | ahc_outb(ahc, CLRINT, CLRSCSIINT); |
| 1959 | ahc_restart(ahc); |
| 1960 | } else { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 1961 | printk("%s: Missing case in ahc_handle_scsiint. status = %x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1962 | ahc_name(ahc), status); |
| 1963 | ahc_outb(ahc, CLRINT, CLRSCSIINT); |
| 1964 | } |
| 1965 | } |
| 1966 | |
| 1967 | /* |
| 1968 | * Force renegotiation to occur the next time we initiate |
| 1969 | * a command to the current device. |
| 1970 | */ |
| 1971 | static void |
| 1972 | ahc_force_renegotiation(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) |
| 1973 | { |
| 1974 | struct ahc_initiator_tinfo *targ_info; |
| 1975 | struct ahc_tmode_tstate *tstate; |
| 1976 | |
| 1977 | targ_info = ahc_fetch_transinfo(ahc, |
| 1978 | devinfo->channel, |
| 1979 | devinfo->our_scsiid, |
| 1980 | devinfo->target, |
| 1981 | &tstate); |
| 1982 | ahc_update_neg_request(ahc, devinfo, tstate, |
| 1983 | targ_info, AHC_NEG_IF_NON_ASYNC); |
| 1984 | } |
| 1985 | |
| 1986 | #define AHC_MAX_STEPS 2000 |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 1987 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1988 | ahc_clear_critical_section(struct ahc_softc *ahc) |
| 1989 | { |
| 1990 | int stepping; |
| 1991 | int steps; |
| 1992 | u_int simode0; |
| 1993 | u_int simode1; |
| 1994 | |
| 1995 | if (ahc->num_critical_sections == 0) |
| 1996 | return; |
| 1997 | |
| 1998 | stepping = FALSE; |
| 1999 | steps = 0; |
| 2000 | simode0 = 0; |
| 2001 | simode1 = 0; |
| 2002 | for (;;) { |
| 2003 | struct cs *cs; |
| 2004 | u_int seqaddr; |
| 2005 | u_int i; |
| 2006 | |
| 2007 | seqaddr = ahc_inb(ahc, SEQADDR0) |
| 2008 | | (ahc_inb(ahc, SEQADDR1) << 8); |
| 2009 | |
| 2010 | /* |
| 2011 | * Seqaddr represents the next instruction to execute, |
| 2012 | * so we are really executing the instruction just |
| 2013 | * before it. |
| 2014 | */ |
| 2015 | if (seqaddr != 0) |
| 2016 | seqaddr -= 1; |
| 2017 | cs = ahc->critical_sections; |
| 2018 | for (i = 0; i < ahc->num_critical_sections; i++, cs++) { |
| 2019 | |
| 2020 | if (cs->begin < seqaddr && cs->end >= seqaddr) |
| 2021 | break; |
| 2022 | } |
| 2023 | |
| 2024 | if (i == ahc->num_critical_sections) |
| 2025 | break; |
| 2026 | |
| 2027 | if (steps > AHC_MAX_STEPS) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 2028 | printk("%s: Infinite loop in critical section\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | ahc_name(ahc)); |
| 2030 | ahc_dump_card_state(ahc); |
| 2031 | panic("critical section loop"); |
| 2032 | } |
| 2033 | |
| 2034 | steps++; |
| 2035 | if (stepping == FALSE) { |
| 2036 | |
| 2037 | /* |
| 2038 | * Disable all interrupt sources so that the |
| 2039 | * sequencer will not be stuck by a pausing |
| 2040 | * interrupt condition while we attempt to |
| 2041 | * leave a critical section. |
| 2042 | */ |
| 2043 | simode0 = ahc_inb(ahc, SIMODE0); |
| 2044 | ahc_outb(ahc, SIMODE0, 0); |
| 2045 | simode1 = ahc_inb(ahc, SIMODE1); |
| 2046 | if ((ahc->features & AHC_DT) != 0) |
| 2047 | /* |
| 2048 | * On DT class controllers, we |
| 2049 | * use the enhanced busfree logic. |
| 2050 | * Unfortunately we cannot re-enable |
| 2051 | * busfree detection within the |
| 2052 | * current connection, so we must |
| 2053 | * leave it on while single stepping. |
| 2054 | */ |
| 2055 | ahc_outb(ahc, SIMODE1, simode1 & ENBUSFREE); |
| 2056 | else |
| 2057 | ahc_outb(ahc, SIMODE1, 0); |
| 2058 | ahc_outb(ahc, CLRINT, CLRSCSIINT); |
| 2059 | ahc_outb(ahc, SEQCTL, ahc->seqctl | STEP); |
| 2060 | stepping = TRUE; |
| 2061 | } |
| 2062 | if ((ahc->features & AHC_DT) != 0) { |
| 2063 | ahc_outb(ahc, CLRSINT1, CLRBUSFREE); |
| 2064 | ahc_outb(ahc, CLRINT, CLRSCSIINT); |
| 2065 | } |
| 2066 | ahc_outb(ahc, HCNTRL, ahc->unpause); |
| 2067 | while (!ahc_is_paused(ahc)) |
| 2068 | ahc_delay(200); |
| 2069 | } |
| 2070 | if (stepping) { |
| 2071 | ahc_outb(ahc, SIMODE0, simode0); |
| 2072 | ahc_outb(ahc, SIMODE1, simode1); |
| 2073 | ahc_outb(ahc, SEQCTL, ahc->seqctl); |
| 2074 | } |
| 2075 | } |
| 2076 | |
| 2077 | /* |
| 2078 | * Clear any pending interrupt status. |
| 2079 | */ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 2080 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2081 | ahc_clear_intstat(struct ahc_softc *ahc) |
| 2082 | { |
| 2083 | /* Clear any interrupt conditions this may have caused */ |
| 2084 | ahc_outb(ahc, CLRSINT1, CLRSELTIMEO|CLRATNO|CLRSCSIRSTI |
| 2085 | |CLRBUSFREE|CLRSCSIPERR|CLRPHASECHG| |
| 2086 | CLRREQINIT); |
| 2087 | ahc_flush_device_writes(ahc); |
| 2088 | ahc_outb(ahc, CLRSINT0, CLRSELDO|CLRSELDI|CLRSELINGO); |
| 2089 | ahc_flush_device_writes(ahc); |
| 2090 | ahc_outb(ahc, CLRINT, CLRSCSIINT); |
| 2091 | ahc_flush_device_writes(ahc); |
| 2092 | } |
| 2093 | |
| 2094 | /**************************** Debugging Routines ******************************/ |
| 2095 | #ifdef AHC_DEBUG |
| 2096 | uint32_t ahc_debug = AHC_DEBUG_OPTS; |
| 2097 | #endif |
| 2098 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 2099 | #if 0 /* unused */ |
| 2100 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2101 | ahc_print_scb(struct scb *scb) |
| 2102 | { |
| 2103 | int i; |
| 2104 | |
| 2105 | struct hardware_scb *hscb = scb->hscb; |
| 2106 | |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 2107 | printk("scb:%p control:0x%x scsiid:0x%x lun:%d cdb_len:%d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | (void *)scb, |
| 2109 | hscb->control, |
| 2110 | hscb->scsiid, |
| 2111 | hscb->lun, |
| 2112 | hscb->cdb_len); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 2113 | printk("Shared Data: "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2114 | for (i = 0; i < sizeof(hscb->shared_data.cdb); i++) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 2115 | printk("%#02x", hscb->shared_data.cdb[i]); |
| 2116 | printk(" dataptr:%#x datacnt:%#x sgptr:%#x tag:%#x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2117 | ahc_le32toh(hscb->dataptr), |
| 2118 | ahc_le32toh(hscb->datacnt), |
| 2119 | ahc_le32toh(hscb->sgptr), |
| 2120 | hscb->tag); |
| 2121 | if (scb->sg_count > 0) { |
| 2122 | for (i = 0; i < scb->sg_count; i++) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 2123 | printk("sg[%d] - Addr 0x%x%x : Length %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2124 | i, |
| 2125 | (ahc_le32toh(scb->sg_list[i].len) >> 24 |
| 2126 | & SG_HIGH_ADDR_BITS), |
| 2127 | ahc_le32toh(scb->sg_list[i].addr), |
| 2128 | ahc_le32toh(scb->sg_list[i].len)); |
| 2129 | } |
| 2130 | } |
| 2131 | } |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 2132 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2133 | |
| 2134 | /************************* Transfer Negotiation *******************************/ |
| 2135 | /* |
| 2136 | * Allocate per target mode instance (ID we respond to as a target) |
| 2137 | * transfer negotiation data structures. |
| 2138 | */ |
| 2139 | static struct ahc_tmode_tstate * |
| 2140 | ahc_alloc_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel) |
| 2141 | { |
| 2142 | struct ahc_tmode_tstate *master_tstate; |
| 2143 | struct ahc_tmode_tstate *tstate; |
| 2144 | int i; |
| 2145 | |
| 2146 | master_tstate = ahc->enabled_targets[ahc->our_id]; |
| 2147 | if (channel == 'B') { |
| 2148 | scsi_id += 8; |
| 2149 | master_tstate = ahc->enabled_targets[ahc->our_id_b + 8]; |
| 2150 | } |
| 2151 | if (ahc->enabled_targets[scsi_id] != NULL |
| 2152 | && ahc->enabled_targets[scsi_id] != master_tstate) |
| 2153 | panic("%s: ahc_alloc_tstate - Target already allocated", |
| 2154 | ahc_name(ahc)); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 2155 | tstate = kmalloc(sizeof(*tstate), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2156 | if (tstate == NULL) |
| 2157 | return (NULL); |
| 2158 | |
| 2159 | /* |
| 2160 | * If we have allocated a master tstate, copy user settings from |
| 2161 | * the master tstate (taken from SRAM or the EEPROM) for this |
| 2162 | * channel, but reset our current and goal settings to async/narrow |
| 2163 | * until an initiator talks to us. |
| 2164 | */ |
| 2165 | if (master_tstate != NULL) { |
| 2166 | memcpy(tstate, master_tstate, sizeof(*tstate)); |
| 2167 | memset(tstate->enabled_luns, 0, sizeof(tstate->enabled_luns)); |
| 2168 | tstate->ultraenb = 0; |
| 2169 | for (i = 0; i < AHC_NUM_TARGETS; i++) { |
| 2170 | memset(&tstate->transinfo[i].curr, 0, |
| 2171 | sizeof(tstate->transinfo[i].curr)); |
| 2172 | memset(&tstate->transinfo[i].goal, 0, |
| 2173 | sizeof(tstate->transinfo[i].goal)); |
| 2174 | } |
| 2175 | } else |
| 2176 | memset(tstate, 0, sizeof(*tstate)); |
| 2177 | ahc->enabled_targets[scsi_id] = tstate; |
| 2178 | return (tstate); |
| 2179 | } |
| 2180 | |
| 2181 | #ifdef AHC_TARGET_MODE |
| 2182 | /* |
| 2183 | * Free per target mode instance (ID we respond to as a target) |
| 2184 | * transfer negotiation data structures. |
| 2185 | */ |
| 2186 | static void |
| 2187 | ahc_free_tstate(struct ahc_softc *ahc, u_int scsi_id, char channel, int force) |
| 2188 | { |
| 2189 | struct ahc_tmode_tstate *tstate; |
| 2190 | |
| 2191 | /* |
| 2192 | * Don't clean up our "master" tstate. |
| 2193 | * It has our default user settings. |
| 2194 | */ |
| 2195 | if (((channel == 'B' && scsi_id == ahc->our_id_b) |
| 2196 | || (channel == 'A' && scsi_id == ahc->our_id)) |
| 2197 | && force == FALSE) |
| 2198 | return; |
| 2199 | |
| 2200 | if (channel == 'B') |
| 2201 | scsi_id += 8; |
| 2202 | tstate = ahc->enabled_targets[scsi_id]; |
| 2203 | if (tstate != NULL) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 2204 | kfree(tstate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2205 | ahc->enabled_targets[scsi_id] = NULL; |
| 2206 | } |
| 2207 | #endif |
| 2208 | |
| 2209 | /* |
| 2210 | * Called when we have an active connection to a target on the bus, |
| 2211 | * this function finds the nearest syncrate to the input period limited |
| 2212 | * by the capabilities of the bus connectivity of and sync settings for |
| 2213 | * the target. |
| 2214 | */ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 2215 | const struct ahc_syncrate * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2216 | ahc_devlimited_syncrate(struct ahc_softc *ahc, |
| 2217 | struct ahc_initiator_tinfo *tinfo, |
| 2218 | u_int *period, u_int *ppr_options, role_t role) |
| 2219 | { |
| 2220 | struct ahc_transinfo *transinfo; |
| 2221 | u_int maxsync; |
| 2222 | |
| 2223 | if ((ahc->features & AHC_ULTRA2) != 0) { |
| 2224 | if ((ahc_inb(ahc, SBLKCTL) & ENAB40) != 0 |
| 2225 | && (ahc_inb(ahc, SSTAT2) & EXP_ACTIVE) == 0) { |
| 2226 | maxsync = AHC_SYNCRATE_DT; |
| 2227 | } else { |
| 2228 | maxsync = AHC_SYNCRATE_ULTRA; |
| 2229 | /* Can't do DT on an SE bus */ |
| 2230 | *ppr_options &= ~MSG_EXT_PPR_DT_REQ; |
| 2231 | } |
| 2232 | } else if ((ahc->features & AHC_ULTRA) != 0) { |
| 2233 | maxsync = AHC_SYNCRATE_ULTRA; |
| 2234 | } else { |
| 2235 | maxsync = AHC_SYNCRATE_FAST; |
| 2236 | } |
| 2237 | /* |
| 2238 | * Never allow a value higher than our current goal |
| 2239 | * period otherwise we may allow a target initiated |
| 2240 | * negotiation to go above the limit as set by the |
| 2241 | * user. In the case of an initiator initiated |
| 2242 | * sync negotiation, we limit based on the user |
| 2243 | * setting. This allows the system to still accept |
| 2244 | * incoming negotiations even if target initiated |
| 2245 | * negotiation is not performed. |
| 2246 | */ |
| 2247 | if (role == ROLE_TARGET) |
| 2248 | transinfo = &tinfo->user; |
| 2249 | else |
| 2250 | transinfo = &tinfo->goal; |
| 2251 | *ppr_options &= transinfo->ppr_options; |
| 2252 | if (transinfo->width == MSG_EXT_WDTR_BUS_8_BIT) { |
Amol Lad | 6d07cb7 | 2006-10-20 14:48:40 -0700 | [diff] [blame] | 2253 | maxsync = max(maxsync, (u_int)AHC_SYNCRATE_ULTRA2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | *ppr_options &= ~MSG_EXT_PPR_DT_REQ; |
| 2255 | } |
| 2256 | if (transinfo->period == 0) { |
| 2257 | *period = 0; |
| 2258 | *ppr_options = 0; |
| 2259 | return (NULL); |
| 2260 | } |
Amol Lad | 6d07cb7 | 2006-10-20 14:48:40 -0700 | [diff] [blame] | 2261 | *period = max(*period, (u_int)transinfo->period); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | return (ahc_find_syncrate(ahc, period, ppr_options, maxsync)); |
| 2263 | } |
| 2264 | |
| 2265 | /* |
| 2266 | * Look up the valid period to SCSIRATE conversion in our table. |
| 2267 | * Return the period and offset that should be sent to the target |
| 2268 | * if this was the beginning of an SDTR. |
| 2269 | */ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 2270 | const struct ahc_syncrate * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2271 | ahc_find_syncrate(struct ahc_softc *ahc, u_int *period, |
| 2272 | u_int *ppr_options, u_int maxsync) |
| 2273 | { |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 2274 | const struct ahc_syncrate *syncrate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2275 | |
| 2276 | if ((ahc->features & AHC_DT) == 0) |
| 2277 | *ppr_options &= ~MSG_EXT_PPR_DT_REQ; |
| 2278 | |
| 2279 | /* Skip all DT only entries if DT is not available */ |
| 2280 | if ((*ppr_options & MSG_EXT_PPR_DT_REQ) == 0 |
| 2281 | && maxsync < AHC_SYNCRATE_ULTRA2) |
| 2282 | maxsync = AHC_SYNCRATE_ULTRA2; |
James Bottomley | 142009a | 2007-07-30 09:52:25 -0500 | [diff] [blame] | 2283 | |
| 2284 | /* Now set the maxsync based on the card capabilities |
| 2285 | * DT is already done above */ |
| 2286 | if ((ahc->features & (AHC_DT | AHC_ULTRA2)) == 0 |
| 2287 | && maxsync < AHC_SYNCRATE_ULTRA) |
| 2288 | maxsync = AHC_SYNCRATE_ULTRA; |
| 2289 | if ((ahc->features & (AHC_DT | AHC_ULTRA2 | AHC_ULTRA)) == 0 |
| 2290 | && maxsync < AHC_SYNCRATE_FAST) |
| 2291 | maxsync = AHC_SYNCRATE_FAST; |
| 2292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2293 | for (syncrate = &ahc_syncrates[maxsync]; |
| 2294 | syncrate->rate != NULL; |
| 2295 | syncrate++) { |
| 2296 | |
| 2297 | /* |
| 2298 | * The Ultra2 table doesn't go as low |
| 2299 | * as for the Fast/Ultra cards. |
| 2300 | */ |
| 2301 | if ((ahc->features & AHC_ULTRA2) != 0 |
| 2302 | && (syncrate->sxfr_u2 == 0)) |
| 2303 | break; |
| 2304 | |
| 2305 | if (*period <= syncrate->period) { |
| 2306 | /* |
| 2307 | * When responding to a target that requests |
| 2308 | * sync, the requested rate may fall between |
| 2309 | * two rates that we can output, but still be |
| 2310 | * a rate that we can receive. Because of this, |
| 2311 | * we want to respond to the target with |
| 2312 | * the same rate that it sent to us even |
| 2313 | * if the period we use to send data to it |
| 2314 | * is lower. Only lower the response period |
| 2315 | * if we must. |
| 2316 | */ |
| 2317 | if (syncrate == &ahc_syncrates[maxsync]) |
| 2318 | *period = syncrate->period; |
| 2319 | |
| 2320 | /* |
| 2321 | * At some speeds, we only support |
| 2322 | * ST transfers. |
| 2323 | */ |
| 2324 | if ((syncrate->sxfr_u2 & ST_SXFR) != 0) |
| 2325 | *ppr_options &= ~MSG_EXT_PPR_DT_REQ; |
| 2326 | break; |
| 2327 | } |
| 2328 | } |
| 2329 | |
| 2330 | if ((*period == 0) |
| 2331 | || (syncrate->rate == NULL) |
| 2332 | || ((ahc->features & AHC_ULTRA2) != 0 |
| 2333 | && (syncrate->sxfr_u2 == 0))) { |
| 2334 | /* Use asynchronous transfers. */ |
| 2335 | *period = 0; |
| 2336 | syncrate = NULL; |
| 2337 | *ppr_options &= ~MSG_EXT_PPR_DT_REQ; |
| 2338 | } |
| 2339 | return (syncrate); |
| 2340 | } |
| 2341 | |
| 2342 | /* |
| 2343 | * Convert from an entry in our syncrate table to the SCSI equivalent |
| 2344 | * sync "period" factor. |
| 2345 | */ |
| 2346 | u_int |
| 2347 | ahc_find_period(struct ahc_softc *ahc, u_int scsirate, u_int maxsync) |
| 2348 | { |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 2349 | const struct ahc_syncrate *syncrate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2350 | |
| 2351 | if ((ahc->features & AHC_ULTRA2) != 0) |
| 2352 | scsirate &= SXFR_ULTRA2; |
| 2353 | else |
| 2354 | scsirate &= SXFR; |
| 2355 | |
James Bottomley | 142009a | 2007-07-30 09:52:25 -0500 | [diff] [blame] | 2356 | /* now set maxsync based on card capabilities */ |
| 2357 | if ((ahc->features & AHC_DT) == 0 && maxsync < AHC_SYNCRATE_ULTRA2) |
| 2358 | maxsync = AHC_SYNCRATE_ULTRA2; |
| 2359 | if ((ahc->features & (AHC_DT | AHC_ULTRA2)) == 0 |
| 2360 | && maxsync < AHC_SYNCRATE_ULTRA) |
| 2361 | maxsync = AHC_SYNCRATE_ULTRA; |
| 2362 | if ((ahc->features & (AHC_DT | AHC_ULTRA2 | AHC_ULTRA)) == 0 |
| 2363 | && maxsync < AHC_SYNCRATE_FAST) |
| 2364 | maxsync = AHC_SYNCRATE_FAST; |
| 2365 | |
| 2366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2367 | syncrate = &ahc_syncrates[maxsync]; |
| 2368 | while (syncrate->rate != NULL) { |
| 2369 | |
| 2370 | if ((ahc->features & AHC_ULTRA2) != 0) { |
| 2371 | if (syncrate->sxfr_u2 == 0) |
| 2372 | break; |
| 2373 | else if (scsirate == (syncrate->sxfr_u2 & SXFR_ULTRA2)) |
| 2374 | return (syncrate->period); |
| 2375 | } else if (scsirate == (syncrate->sxfr & SXFR)) { |
| 2376 | return (syncrate->period); |
| 2377 | } |
| 2378 | syncrate++; |
| 2379 | } |
| 2380 | return (0); /* async */ |
| 2381 | } |
| 2382 | |
| 2383 | /* |
| 2384 | * Truncate the given synchronous offset to a value the |
| 2385 | * current adapter type and syncrate are capable of. |
| 2386 | */ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 2387 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2388 | ahc_validate_offset(struct ahc_softc *ahc, |
| 2389 | struct ahc_initiator_tinfo *tinfo, |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 2390 | const struct ahc_syncrate *syncrate, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2391 | u_int *offset, int wide, role_t role) |
| 2392 | { |
| 2393 | u_int maxoffset; |
| 2394 | |
| 2395 | /* Limit offset to what we can do */ |
| 2396 | if (syncrate == NULL) { |
| 2397 | maxoffset = 0; |
| 2398 | } else if ((ahc->features & AHC_ULTRA2) != 0) { |
| 2399 | maxoffset = MAX_OFFSET_ULTRA2; |
| 2400 | } else { |
| 2401 | if (wide) |
| 2402 | maxoffset = MAX_OFFSET_16BIT; |
| 2403 | else |
| 2404 | maxoffset = MAX_OFFSET_8BIT; |
| 2405 | } |
Amol Lad | 6d07cb7 | 2006-10-20 14:48:40 -0700 | [diff] [blame] | 2406 | *offset = min(*offset, maxoffset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2407 | if (tinfo != NULL) { |
| 2408 | if (role == ROLE_TARGET) |
Amol Lad | 6d07cb7 | 2006-10-20 14:48:40 -0700 | [diff] [blame] | 2409 | *offset = min(*offset, (u_int)tinfo->user.offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2410 | else |
Amol Lad | 6d07cb7 | 2006-10-20 14:48:40 -0700 | [diff] [blame] | 2411 | *offset = min(*offset, (u_int)tinfo->goal.offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2412 | } |
| 2413 | } |
| 2414 | |
| 2415 | /* |
| 2416 | * Truncate the given transfer width parameter to a value the |
| 2417 | * current adapter type is capable of. |
| 2418 | */ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 2419 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2420 | ahc_validate_width(struct ahc_softc *ahc, struct ahc_initiator_tinfo *tinfo, |
| 2421 | u_int *bus_width, role_t role) |
| 2422 | { |
| 2423 | switch (*bus_width) { |
| 2424 | default: |
| 2425 | if (ahc->features & AHC_WIDE) { |
| 2426 | /* Respond Wide */ |
| 2427 | *bus_width = MSG_EXT_WDTR_BUS_16_BIT; |
| 2428 | break; |
| 2429 | } |
| 2430 | /* FALLTHROUGH */ |
| 2431 | case MSG_EXT_WDTR_BUS_8_BIT: |
| 2432 | *bus_width = MSG_EXT_WDTR_BUS_8_BIT; |
| 2433 | break; |
| 2434 | } |
| 2435 | if (tinfo != NULL) { |
| 2436 | if (role == ROLE_TARGET) |
Amol Lad | 6d07cb7 | 2006-10-20 14:48:40 -0700 | [diff] [blame] | 2437 | *bus_width = min((u_int)tinfo->user.width, *bus_width); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2438 | else |
Amol Lad | 6d07cb7 | 2006-10-20 14:48:40 -0700 | [diff] [blame] | 2439 | *bus_width = min((u_int)tinfo->goal.width, *bus_width); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2440 | } |
| 2441 | } |
| 2442 | |
| 2443 | /* |
| 2444 | * Update the bitmask of targets for which the controller should |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 2445 | * negotiate with at the next convenient opportunity. This currently |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2446 | * means the next time we send the initial identify messages for |
| 2447 | * a new transaction. |
| 2448 | */ |
| 2449 | int |
| 2450 | ahc_update_neg_request(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, |
| 2451 | struct ahc_tmode_tstate *tstate, |
| 2452 | struct ahc_initiator_tinfo *tinfo, ahc_neg_type neg_type) |
| 2453 | { |
| 2454 | u_int auto_negotiate_orig; |
| 2455 | |
| 2456 | auto_negotiate_orig = tstate->auto_negotiate; |
| 2457 | if (neg_type == AHC_NEG_ALWAYS) { |
| 2458 | /* |
| 2459 | * Force our "current" settings to be |
| 2460 | * unknown so that unless a bus reset |
| 2461 | * occurs the need to renegotiate is |
| 2462 | * recorded persistently. |
| 2463 | */ |
| 2464 | if ((ahc->features & AHC_WIDE) != 0) |
| 2465 | tinfo->curr.width = AHC_WIDTH_UNKNOWN; |
| 2466 | tinfo->curr.period = AHC_PERIOD_UNKNOWN; |
| 2467 | tinfo->curr.offset = AHC_OFFSET_UNKNOWN; |
| 2468 | } |
| 2469 | if (tinfo->curr.period != tinfo->goal.period |
| 2470 | || tinfo->curr.width != tinfo->goal.width |
| 2471 | || tinfo->curr.offset != tinfo->goal.offset |
| 2472 | || tinfo->curr.ppr_options != tinfo->goal.ppr_options |
| 2473 | || (neg_type == AHC_NEG_IF_NON_ASYNC |
| 2474 | && (tinfo->goal.offset != 0 |
| 2475 | || tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT |
| 2476 | || tinfo->goal.ppr_options != 0))) |
| 2477 | tstate->auto_negotiate |= devinfo->target_mask; |
| 2478 | else |
| 2479 | tstate->auto_negotiate &= ~devinfo->target_mask; |
| 2480 | |
| 2481 | return (auto_negotiate_orig != tstate->auto_negotiate); |
| 2482 | } |
| 2483 | |
| 2484 | /* |
| 2485 | * Update the user/goal/curr tables of synchronous negotiation |
| 2486 | * parameters as well as, in the case of a current or active update, |
| 2487 | * any data structures on the host controller. In the case of an |
| 2488 | * active update, the specified target is currently talking to us on |
| 2489 | * the bus, so the transfer parameter update must take effect |
| 2490 | * immediately. |
| 2491 | */ |
| 2492 | void |
| 2493 | ahc_set_syncrate(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 2494 | const struct ahc_syncrate *syncrate, u_int period, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2495 | u_int offset, u_int ppr_options, u_int type, int paused) |
| 2496 | { |
| 2497 | struct ahc_initiator_tinfo *tinfo; |
| 2498 | struct ahc_tmode_tstate *tstate; |
| 2499 | u_int old_period; |
| 2500 | u_int old_offset; |
| 2501 | u_int old_ppr; |
| 2502 | int active; |
| 2503 | int update_needed; |
| 2504 | |
| 2505 | active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE; |
| 2506 | update_needed = 0; |
| 2507 | |
| 2508 | if (syncrate == NULL) { |
| 2509 | period = 0; |
| 2510 | offset = 0; |
| 2511 | } |
| 2512 | |
| 2513 | tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, |
| 2514 | devinfo->target, &tstate); |
| 2515 | |
| 2516 | if ((type & AHC_TRANS_USER) != 0) { |
| 2517 | tinfo->user.period = period; |
| 2518 | tinfo->user.offset = offset; |
| 2519 | tinfo->user.ppr_options = ppr_options; |
| 2520 | } |
| 2521 | |
| 2522 | if ((type & AHC_TRANS_GOAL) != 0) { |
| 2523 | tinfo->goal.period = period; |
| 2524 | tinfo->goal.offset = offset; |
| 2525 | tinfo->goal.ppr_options = ppr_options; |
| 2526 | } |
| 2527 | |
| 2528 | old_period = tinfo->curr.period; |
| 2529 | old_offset = tinfo->curr.offset; |
| 2530 | old_ppr = tinfo->curr.ppr_options; |
| 2531 | |
| 2532 | if ((type & AHC_TRANS_CUR) != 0 |
| 2533 | && (old_period != period |
| 2534 | || old_offset != offset |
| 2535 | || old_ppr != ppr_options)) { |
| 2536 | u_int scsirate; |
| 2537 | |
| 2538 | update_needed++; |
| 2539 | scsirate = tinfo->scsirate; |
| 2540 | if ((ahc->features & AHC_ULTRA2) != 0) { |
| 2541 | |
| 2542 | scsirate &= ~(SXFR_ULTRA2|SINGLE_EDGE|ENABLE_CRC); |
| 2543 | if (syncrate != NULL) { |
| 2544 | scsirate |= syncrate->sxfr_u2; |
| 2545 | if ((ppr_options & MSG_EXT_PPR_DT_REQ) != 0) |
| 2546 | scsirate |= ENABLE_CRC; |
| 2547 | else |
| 2548 | scsirate |= SINGLE_EDGE; |
| 2549 | } |
| 2550 | } else { |
| 2551 | |
| 2552 | scsirate &= ~(SXFR|SOFS); |
| 2553 | /* |
| 2554 | * Ensure Ultra mode is set properly for |
| 2555 | * this target. |
| 2556 | */ |
| 2557 | tstate->ultraenb &= ~devinfo->target_mask; |
| 2558 | if (syncrate != NULL) { |
| 2559 | if (syncrate->sxfr & ULTRA_SXFR) { |
| 2560 | tstate->ultraenb |= |
| 2561 | devinfo->target_mask; |
| 2562 | } |
| 2563 | scsirate |= syncrate->sxfr & SXFR; |
| 2564 | scsirate |= offset & SOFS; |
| 2565 | } |
| 2566 | if (active) { |
| 2567 | u_int sxfrctl0; |
| 2568 | |
| 2569 | sxfrctl0 = ahc_inb(ahc, SXFRCTL0); |
| 2570 | sxfrctl0 &= ~FAST20; |
| 2571 | if (tstate->ultraenb & devinfo->target_mask) |
| 2572 | sxfrctl0 |= FAST20; |
| 2573 | ahc_outb(ahc, SXFRCTL0, sxfrctl0); |
| 2574 | } |
| 2575 | } |
| 2576 | if (active) { |
| 2577 | ahc_outb(ahc, SCSIRATE, scsirate); |
| 2578 | if ((ahc->features & AHC_ULTRA2) != 0) |
| 2579 | ahc_outb(ahc, SCSIOFFSET, offset); |
| 2580 | } |
| 2581 | |
| 2582 | tinfo->scsirate = scsirate; |
| 2583 | tinfo->curr.period = period; |
| 2584 | tinfo->curr.offset = offset; |
| 2585 | tinfo->curr.ppr_options = ppr_options; |
| 2586 | |
| 2587 | ahc_send_async(ahc, devinfo->channel, devinfo->target, |
Hannes Reinecke | 9080063 | 2006-10-23 15:25:36 +0200 | [diff] [blame] | 2588 | CAM_LUN_WILDCARD, AC_TRANSFER_NEG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2589 | if (bootverbose) { |
| 2590 | if (offset != 0) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 2591 | printk("%s: target %d synchronous at %sMHz%s, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2592 | "offset = 0x%x\n", ahc_name(ahc), |
| 2593 | devinfo->target, syncrate->rate, |
| 2594 | (ppr_options & MSG_EXT_PPR_DT_REQ) |
| 2595 | ? " DT" : "", offset); |
| 2596 | } else { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 2597 | printk("%s: target %d using " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | "asynchronous transfers\n", |
| 2599 | ahc_name(ahc), devinfo->target); |
| 2600 | } |
| 2601 | } |
| 2602 | } |
| 2603 | |
| 2604 | update_needed += ahc_update_neg_request(ahc, devinfo, tstate, |
| 2605 | tinfo, AHC_NEG_TO_GOAL); |
| 2606 | |
| 2607 | if (update_needed) |
| 2608 | ahc_update_pending_scbs(ahc); |
| 2609 | } |
| 2610 | |
| 2611 | /* |
| 2612 | * Update the user/goal/curr tables of wide negotiation |
| 2613 | * parameters as well as, in the case of a current or active update, |
| 2614 | * any data structures on the host controller. In the case of an |
| 2615 | * active update, the specified target is currently talking to us on |
| 2616 | * the bus, so the transfer parameter update must take effect |
| 2617 | * immediately. |
| 2618 | */ |
| 2619 | void |
| 2620 | ahc_set_width(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, |
| 2621 | u_int width, u_int type, int paused) |
| 2622 | { |
| 2623 | struct ahc_initiator_tinfo *tinfo; |
| 2624 | struct ahc_tmode_tstate *tstate; |
| 2625 | u_int oldwidth; |
| 2626 | int active; |
| 2627 | int update_needed; |
| 2628 | |
| 2629 | active = (type & AHC_TRANS_ACTIVE) == AHC_TRANS_ACTIVE; |
| 2630 | update_needed = 0; |
| 2631 | tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, |
| 2632 | devinfo->target, &tstate); |
| 2633 | |
| 2634 | if ((type & AHC_TRANS_USER) != 0) |
| 2635 | tinfo->user.width = width; |
| 2636 | |
| 2637 | if ((type & AHC_TRANS_GOAL) != 0) |
| 2638 | tinfo->goal.width = width; |
| 2639 | |
| 2640 | oldwidth = tinfo->curr.width; |
| 2641 | if ((type & AHC_TRANS_CUR) != 0 && oldwidth != width) { |
| 2642 | u_int scsirate; |
| 2643 | |
| 2644 | update_needed++; |
| 2645 | scsirate = tinfo->scsirate; |
| 2646 | scsirate &= ~WIDEXFER; |
| 2647 | if (width == MSG_EXT_WDTR_BUS_16_BIT) |
| 2648 | scsirate |= WIDEXFER; |
| 2649 | |
| 2650 | tinfo->scsirate = scsirate; |
| 2651 | |
| 2652 | if (active) |
| 2653 | ahc_outb(ahc, SCSIRATE, scsirate); |
| 2654 | |
| 2655 | tinfo->curr.width = width; |
| 2656 | |
| 2657 | ahc_send_async(ahc, devinfo->channel, devinfo->target, |
Hannes Reinecke | 9080063 | 2006-10-23 15:25:36 +0200 | [diff] [blame] | 2658 | CAM_LUN_WILDCARD, AC_TRANSFER_NEG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2659 | if (bootverbose) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 2660 | printk("%s: target %d using %dbit transfers\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2661 | ahc_name(ahc), devinfo->target, |
| 2662 | 8 * (0x01 << width)); |
| 2663 | } |
| 2664 | } |
| 2665 | |
| 2666 | update_needed += ahc_update_neg_request(ahc, devinfo, tstate, |
| 2667 | tinfo, AHC_NEG_TO_GOAL); |
| 2668 | if (update_needed) |
| 2669 | ahc_update_pending_scbs(ahc); |
| 2670 | } |
| 2671 | |
| 2672 | /* |
| 2673 | * Update the current state of tagged queuing for a given target. |
| 2674 | */ |
Adrian Bunk | e3e0ca5 | 2007-03-26 21:59:29 -0800 | [diff] [blame] | 2675 | static void |
Hannes Reinecke | 9080063 | 2006-10-23 15:25:36 +0200 | [diff] [blame] | 2676 | ahc_set_tags(struct ahc_softc *ahc, struct scsi_cmnd *cmd, |
| 2677 | struct ahc_devinfo *devinfo, ahc_queue_alg alg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2678 | { |
Hannes Reinecke | 9080063 | 2006-10-23 15:25:36 +0200 | [diff] [blame] | 2679 | struct scsi_device *sdev = cmd->device; |
| 2680 | |
| 2681 | ahc_platform_set_tags(ahc, sdev, devinfo, alg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2682 | ahc_send_async(ahc, devinfo->channel, devinfo->target, |
Hannes Reinecke | 9080063 | 2006-10-23 15:25:36 +0200 | [diff] [blame] | 2683 | devinfo->lun, AC_TRANSFER_NEG); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2684 | } |
| 2685 | |
| 2686 | /* |
| 2687 | * When the transfer settings for a connection change, update any |
| 2688 | * in-transit SCBs to contain the new data so the hardware will |
| 2689 | * be set correctly during future (re)selections. |
| 2690 | */ |
| 2691 | static void |
| 2692 | ahc_update_pending_scbs(struct ahc_softc *ahc) |
| 2693 | { |
| 2694 | struct scb *pending_scb; |
| 2695 | int pending_scb_count; |
| 2696 | int i; |
| 2697 | int paused; |
| 2698 | u_int saved_scbptr; |
| 2699 | |
| 2700 | /* |
| 2701 | * Traverse the pending SCB list and ensure that all of the |
| 2702 | * SCBs there have the proper settings. |
| 2703 | */ |
| 2704 | pending_scb_count = 0; |
| 2705 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { |
| 2706 | struct ahc_devinfo devinfo; |
| 2707 | struct hardware_scb *pending_hscb; |
| 2708 | struct ahc_initiator_tinfo *tinfo; |
| 2709 | struct ahc_tmode_tstate *tstate; |
| 2710 | |
| 2711 | ahc_scb_devinfo(ahc, &devinfo, pending_scb); |
| 2712 | tinfo = ahc_fetch_transinfo(ahc, devinfo.channel, |
| 2713 | devinfo.our_scsiid, |
| 2714 | devinfo.target, &tstate); |
| 2715 | pending_hscb = pending_scb->hscb; |
| 2716 | pending_hscb->control &= ~ULTRAENB; |
| 2717 | if ((tstate->ultraenb & devinfo.target_mask) != 0) |
| 2718 | pending_hscb->control |= ULTRAENB; |
| 2719 | pending_hscb->scsirate = tinfo->scsirate; |
| 2720 | pending_hscb->scsioffset = tinfo->curr.offset; |
| 2721 | if ((tstate->auto_negotiate & devinfo.target_mask) == 0 |
| 2722 | && (pending_scb->flags & SCB_AUTO_NEGOTIATE) != 0) { |
| 2723 | pending_scb->flags &= ~SCB_AUTO_NEGOTIATE; |
| 2724 | pending_hscb->control &= ~MK_MESSAGE; |
| 2725 | } |
| 2726 | ahc_sync_scb(ahc, pending_scb, |
| 2727 | BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); |
| 2728 | pending_scb_count++; |
| 2729 | } |
| 2730 | |
| 2731 | if (pending_scb_count == 0) |
| 2732 | return; |
| 2733 | |
| 2734 | if (ahc_is_paused(ahc)) { |
| 2735 | paused = 1; |
| 2736 | } else { |
| 2737 | paused = 0; |
| 2738 | ahc_pause(ahc); |
| 2739 | } |
| 2740 | |
| 2741 | saved_scbptr = ahc_inb(ahc, SCBPTR); |
| 2742 | /* Ensure that the hscbs down on the card match the new information */ |
| 2743 | for (i = 0; i < ahc->scb_data->maxhscbs; i++) { |
| 2744 | struct hardware_scb *pending_hscb; |
| 2745 | u_int control; |
| 2746 | u_int scb_tag; |
| 2747 | |
| 2748 | ahc_outb(ahc, SCBPTR, i); |
| 2749 | scb_tag = ahc_inb(ahc, SCB_TAG); |
| 2750 | pending_scb = ahc_lookup_scb(ahc, scb_tag); |
| 2751 | if (pending_scb == NULL) |
| 2752 | continue; |
| 2753 | |
| 2754 | pending_hscb = pending_scb->hscb; |
| 2755 | control = ahc_inb(ahc, SCB_CONTROL); |
| 2756 | control &= ~(ULTRAENB|MK_MESSAGE); |
| 2757 | control |= pending_hscb->control & (ULTRAENB|MK_MESSAGE); |
| 2758 | ahc_outb(ahc, SCB_CONTROL, control); |
| 2759 | ahc_outb(ahc, SCB_SCSIRATE, pending_hscb->scsirate); |
| 2760 | ahc_outb(ahc, SCB_SCSIOFFSET, pending_hscb->scsioffset); |
| 2761 | } |
| 2762 | ahc_outb(ahc, SCBPTR, saved_scbptr); |
| 2763 | |
| 2764 | if (paused == 0) |
| 2765 | ahc_unpause(ahc); |
| 2766 | } |
| 2767 | |
| 2768 | /**************************** Pathing Information *****************************/ |
| 2769 | static void |
| 2770 | ahc_fetch_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) |
| 2771 | { |
| 2772 | u_int saved_scsiid; |
| 2773 | role_t role; |
| 2774 | int our_id; |
| 2775 | |
| 2776 | if (ahc_inb(ahc, SSTAT0) & TARGET) |
| 2777 | role = ROLE_TARGET; |
| 2778 | else |
| 2779 | role = ROLE_INITIATOR; |
| 2780 | |
| 2781 | if (role == ROLE_TARGET |
| 2782 | && (ahc->features & AHC_MULTI_TID) != 0 |
| 2783 | && (ahc_inb(ahc, SEQ_FLAGS) |
| 2784 | & (CMDPHASE_PENDING|TARG_CMD_PENDING|NO_DISCONNECT)) != 0) { |
| 2785 | /* We were selected, so pull our id from TARGIDIN */ |
| 2786 | our_id = ahc_inb(ahc, TARGIDIN) & OID; |
| 2787 | } else if ((ahc->features & AHC_ULTRA2) != 0) |
| 2788 | our_id = ahc_inb(ahc, SCSIID_ULTRA2) & OID; |
| 2789 | else |
| 2790 | our_id = ahc_inb(ahc, SCSIID) & OID; |
| 2791 | |
| 2792 | saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); |
| 2793 | ahc_compile_devinfo(devinfo, |
| 2794 | our_id, |
| 2795 | SCSIID_TARGET(ahc, saved_scsiid), |
| 2796 | ahc_inb(ahc, SAVED_LUN), |
| 2797 | SCSIID_CHANNEL(ahc, saved_scsiid), |
| 2798 | role); |
| 2799 | } |
| 2800 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 2801 | static const struct ahc_phase_table_entry* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2802 | ahc_lookup_phase_entry(int phase) |
| 2803 | { |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 2804 | const struct ahc_phase_table_entry *entry; |
| 2805 | const struct ahc_phase_table_entry *last_entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2806 | |
| 2807 | /* |
| 2808 | * num_phases doesn't include the default entry which |
| 2809 | * will be returned if the phase doesn't match. |
| 2810 | */ |
| 2811 | last_entry = &ahc_phase_table[num_phases]; |
| 2812 | for (entry = ahc_phase_table; entry < last_entry; entry++) { |
| 2813 | if (phase == entry->phase) |
| 2814 | break; |
| 2815 | } |
| 2816 | return (entry); |
| 2817 | } |
| 2818 | |
| 2819 | void |
| 2820 | ahc_compile_devinfo(struct ahc_devinfo *devinfo, u_int our_id, u_int target, |
| 2821 | u_int lun, char channel, role_t role) |
| 2822 | { |
| 2823 | devinfo->our_scsiid = our_id; |
| 2824 | devinfo->target = target; |
| 2825 | devinfo->lun = lun; |
| 2826 | devinfo->target_offset = target; |
| 2827 | devinfo->channel = channel; |
| 2828 | devinfo->role = role; |
| 2829 | if (channel == 'B') |
| 2830 | devinfo->target_offset += 8; |
| 2831 | devinfo->target_mask = (0x01 << devinfo->target_offset); |
| 2832 | } |
| 2833 | |
| 2834 | void |
| 2835 | ahc_print_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) |
| 2836 | { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 2837 | printk("%s:%c:%d:%d: ", ahc_name(ahc), devinfo->channel, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2838 | devinfo->target, devinfo->lun); |
| 2839 | } |
| 2840 | |
| 2841 | static void |
| 2842 | ahc_scb_devinfo(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, |
| 2843 | struct scb *scb) |
| 2844 | { |
| 2845 | role_t role; |
| 2846 | int our_id; |
| 2847 | |
| 2848 | our_id = SCSIID_OUR_ID(scb->hscb->scsiid); |
| 2849 | role = ROLE_INITIATOR; |
| 2850 | if ((scb->flags & SCB_TARGET_SCB) != 0) |
| 2851 | role = ROLE_TARGET; |
| 2852 | ahc_compile_devinfo(devinfo, our_id, SCB_GET_TARGET(ahc, scb), |
| 2853 | SCB_GET_LUN(scb), SCB_GET_CHANNEL(ahc, scb), role); |
| 2854 | } |
| 2855 | |
| 2856 | |
| 2857 | /************************ Message Phase Processing ****************************/ |
| 2858 | static void |
| 2859 | ahc_assert_atn(struct ahc_softc *ahc) |
| 2860 | { |
| 2861 | u_int scsisigo; |
| 2862 | |
| 2863 | scsisigo = ATNO; |
| 2864 | if ((ahc->features & AHC_DT) == 0) |
| 2865 | scsisigo |= ahc_inb(ahc, SCSISIGI); |
| 2866 | ahc_outb(ahc, SCSISIGO, scsisigo); |
| 2867 | } |
| 2868 | |
| 2869 | /* |
| 2870 | * When an initiator transaction with the MK_MESSAGE flag either reconnects |
| 2871 | * or enters the initial message out phase, we are interrupted. Fill our |
| 2872 | * outgoing message buffer with the appropriate message and beging handing |
| 2873 | * the message phase(s) manually. |
| 2874 | */ |
| 2875 | static void |
| 2876 | ahc_setup_initiator_msgout(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, |
| 2877 | struct scb *scb) |
| 2878 | { |
| 2879 | /* |
| 2880 | * To facilitate adding multiple messages together, |
| 2881 | * each routine should increment the index and len |
| 2882 | * variables instead of setting them explicitly. |
| 2883 | */ |
| 2884 | ahc->msgout_index = 0; |
| 2885 | ahc->msgout_len = 0; |
| 2886 | |
| 2887 | if ((scb->flags & SCB_DEVICE_RESET) == 0 |
| 2888 | && ahc_inb(ahc, MSG_OUT) == MSG_IDENTIFYFLAG) { |
| 2889 | u_int identify_msg; |
| 2890 | |
| 2891 | identify_msg = MSG_IDENTIFYFLAG | SCB_GET_LUN(scb); |
| 2892 | if ((scb->hscb->control & DISCENB) != 0) |
| 2893 | identify_msg |= MSG_IDENTIFY_DISCFLAG; |
| 2894 | ahc->msgout_buf[ahc->msgout_index++] = identify_msg; |
| 2895 | ahc->msgout_len++; |
| 2896 | |
| 2897 | if ((scb->hscb->control & TAG_ENB) != 0) { |
| 2898 | ahc->msgout_buf[ahc->msgout_index++] = |
| 2899 | scb->hscb->control & (TAG_ENB|SCB_TAG_TYPE); |
| 2900 | ahc->msgout_buf[ahc->msgout_index++] = scb->hscb->tag; |
| 2901 | ahc->msgout_len += 2; |
| 2902 | } |
| 2903 | } |
| 2904 | |
| 2905 | if (scb->flags & SCB_DEVICE_RESET) { |
| 2906 | ahc->msgout_buf[ahc->msgout_index++] = MSG_BUS_DEV_RESET; |
| 2907 | ahc->msgout_len++; |
| 2908 | ahc_print_path(ahc, scb); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 2909 | printk("Bus Device Reset Message Sent\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2910 | /* |
| 2911 | * Clear our selection hardware in advance of |
| 2912 | * the busfree. We may have an entry in the waiting |
| 2913 | * Q for this target, and we don't want to go about |
| 2914 | * selecting while we handle the busfree and blow it |
| 2915 | * away. |
| 2916 | */ |
| 2917 | ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO)); |
| 2918 | } else if ((scb->flags & SCB_ABORT) != 0) { |
| 2919 | if ((scb->hscb->control & TAG_ENB) != 0) |
| 2920 | ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT_TAG; |
| 2921 | else |
| 2922 | ahc->msgout_buf[ahc->msgout_index++] = MSG_ABORT; |
| 2923 | ahc->msgout_len++; |
| 2924 | ahc_print_path(ahc, scb); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 2925 | printk("Abort%s Message Sent\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2926 | (scb->hscb->control & TAG_ENB) != 0 ? " Tag" : ""); |
| 2927 | /* |
| 2928 | * Clear our selection hardware in advance of |
| 2929 | * the busfree. We may have an entry in the waiting |
| 2930 | * Q for this target, and we don't want to go about |
| 2931 | * selecting while we handle the busfree and blow it |
| 2932 | * away. |
| 2933 | */ |
| 2934 | ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO)); |
| 2935 | } else if ((scb->flags & (SCB_AUTO_NEGOTIATE|SCB_NEGOTIATE)) != 0) { |
| 2936 | ahc_build_transfer_msg(ahc, devinfo); |
| 2937 | } else { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 2938 | printk("ahc_intr: AWAITING_MSG for an SCB that " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2939 | "does not have a waiting message\n"); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 2940 | printk("SCSIID = %x, target_mask = %x\n", scb->hscb->scsiid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2941 | devinfo->target_mask); |
| 2942 | panic("SCB = %d, SCB Control = %x, MSG_OUT = %x " |
| 2943 | "SCB flags = %x", scb->hscb->tag, scb->hscb->control, |
| 2944 | ahc_inb(ahc, MSG_OUT), scb->flags); |
| 2945 | } |
| 2946 | |
| 2947 | /* |
| 2948 | * Clear the MK_MESSAGE flag from the SCB so we aren't |
| 2949 | * asked to send this message again. |
| 2950 | */ |
| 2951 | ahc_outb(ahc, SCB_CONTROL, ahc_inb(ahc, SCB_CONTROL) & ~MK_MESSAGE); |
| 2952 | scb->hscb->control &= ~MK_MESSAGE; |
| 2953 | ahc->msgout_index = 0; |
| 2954 | ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; |
| 2955 | } |
| 2956 | |
| 2957 | /* |
| 2958 | * Build an appropriate transfer negotiation message for the |
| 2959 | * currently active target. |
| 2960 | */ |
| 2961 | static void |
| 2962 | ahc_build_transfer_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) |
| 2963 | { |
| 2964 | /* |
| 2965 | * We need to initiate transfer negotiations. |
| 2966 | * If our current and goal settings are identical, |
| 2967 | * we want to renegotiate due to a check condition. |
| 2968 | */ |
| 2969 | struct ahc_initiator_tinfo *tinfo; |
| 2970 | struct ahc_tmode_tstate *tstate; |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 2971 | const struct ahc_syncrate *rate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2972 | int dowide; |
| 2973 | int dosync; |
| 2974 | int doppr; |
| 2975 | u_int period; |
| 2976 | u_int ppr_options; |
| 2977 | u_int offset; |
| 2978 | |
| 2979 | tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, |
| 2980 | devinfo->target, &tstate); |
| 2981 | /* |
| 2982 | * Filter our period based on the current connection. |
| 2983 | * If we can't perform DT transfers on this segment (not in LVD |
| 2984 | * mode for instance), then our decision to issue a PPR message |
| 2985 | * may change. |
| 2986 | */ |
| 2987 | period = tinfo->goal.period; |
| 2988 | offset = tinfo->goal.offset; |
| 2989 | ppr_options = tinfo->goal.ppr_options; |
| 2990 | /* Target initiated PPR is not allowed in the SCSI spec */ |
| 2991 | if (devinfo->role == ROLE_TARGET) |
| 2992 | ppr_options = 0; |
| 2993 | rate = ahc_devlimited_syncrate(ahc, tinfo, &period, |
| 2994 | &ppr_options, devinfo->role); |
| 2995 | dowide = tinfo->curr.width != tinfo->goal.width; |
| 2996 | dosync = tinfo->curr.offset != offset || tinfo->curr.period != period; |
| 2997 | /* |
| 2998 | * Only use PPR if we have options that need it, even if the device |
| 2999 | * claims to support it. There might be an expander in the way |
| 3000 | * that doesn't. |
| 3001 | */ |
| 3002 | doppr = ppr_options != 0; |
| 3003 | |
| 3004 | if (!dowide && !dosync && !doppr) { |
| 3005 | dowide = tinfo->goal.width != MSG_EXT_WDTR_BUS_8_BIT; |
| 3006 | dosync = tinfo->goal.offset != 0; |
| 3007 | } |
| 3008 | |
| 3009 | if (!dowide && !dosync && !doppr) { |
| 3010 | /* |
| 3011 | * Force async with a WDTR message if we have a wide bus, |
| 3012 | * or just issue an SDTR with a 0 offset. |
| 3013 | */ |
| 3014 | if ((ahc->features & AHC_WIDE) != 0) |
| 3015 | dowide = 1; |
| 3016 | else |
| 3017 | dosync = 1; |
| 3018 | |
| 3019 | if (bootverbose) { |
| 3020 | ahc_print_devinfo(ahc, devinfo); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3021 | printk("Ensuring async\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3022 | } |
| 3023 | } |
| 3024 | |
| 3025 | /* Target initiated PPR is not allowed in the SCSI spec */ |
| 3026 | if (devinfo->role == ROLE_TARGET) |
| 3027 | doppr = 0; |
| 3028 | |
| 3029 | /* |
| 3030 | * Both the PPR message and SDTR message require the |
| 3031 | * goal syncrate to be limited to what the target device |
| 3032 | * is capable of handling (based on whether an LVD->SE |
| 3033 | * expander is on the bus), so combine these two cases. |
| 3034 | * Regardless, guarantee that if we are using WDTR and SDTR |
| 3035 | * messages that WDTR comes first. |
| 3036 | */ |
| 3037 | if (doppr || (dosync && !dowide)) { |
| 3038 | |
| 3039 | offset = tinfo->goal.offset; |
| 3040 | ahc_validate_offset(ahc, tinfo, rate, &offset, |
| 3041 | doppr ? tinfo->goal.width |
| 3042 | : tinfo->curr.width, |
| 3043 | devinfo->role); |
| 3044 | if (doppr) { |
| 3045 | ahc_construct_ppr(ahc, devinfo, period, offset, |
| 3046 | tinfo->goal.width, ppr_options); |
| 3047 | } else { |
| 3048 | ahc_construct_sdtr(ahc, devinfo, period, offset); |
| 3049 | } |
| 3050 | } else { |
| 3051 | ahc_construct_wdtr(ahc, devinfo, tinfo->goal.width); |
| 3052 | } |
| 3053 | } |
| 3054 | |
| 3055 | /* |
| 3056 | * Build a synchronous negotiation message in our message |
| 3057 | * buffer based on the input parameters. |
| 3058 | */ |
| 3059 | static void |
| 3060 | ahc_construct_sdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, |
| 3061 | u_int period, u_int offset) |
| 3062 | { |
| 3063 | if (offset == 0) |
| 3064 | period = AHC_ASYNC_XFER_PERIOD; |
Matthew Wilcox | 6ea3c0b | 2006-02-07 07:54:46 -0700 | [diff] [blame] | 3065 | ahc->msgout_index += spi_populate_sync_msg( |
| 3066 | ahc->msgout_buf + ahc->msgout_index, period, offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3067 | ahc->msgout_len += 5; |
| 3068 | if (bootverbose) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3069 | printk("(%s:%c:%d:%d): Sending SDTR period %x, offset %x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3070 | ahc_name(ahc), devinfo->channel, devinfo->target, |
| 3071 | devinfo->lun, period, offset); |
| 3072 | } |
| 3073 | } |
| 3074 | |
| 3075 | /* |
| 3076 | * Build a wide negotiation message in our message |
| 3077 | * buffer based on the input parameters. |
| 3078 | */ |
| 3079 | static void |
| 3080 | ahc_construct_wdtr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, |
| 3081 | u_int bus_width) |
| 3082 | { |
Matthew Wilcox | 6ea3c0b | 2006-02-07 07:54:46 -0700 | [diff] [blame] | 3083 | ahc->msgout_index += spi_populate_width_msg( |
| 3084 | ahc->msgout_buf + ahc->msgout_index, bus_width); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3085 | ahc->msgout_len += 4; |
| 3086 | if (bootverbose) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3087 | printk("(%s:%c:%d:%d): Sending WDTR %x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3088 | ahc_name(ahc), devinfo->channel, devinfo->target, |
| 3089 | devinfo->lun, bus_width); |
| 3090 | } |
| 3091 | } |
| 3092 | |
| 3093 | /* |
| 3094 | * Build a parallel protocol request message in our message |
| 3095 | * buffer based on the input parameters. |
| 3096 | */ |
| 3097 | static void |
| 3098 | ahc_construct_ppr(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, |
| 3099 | u_int period, u_int offset, u_int bus_width, |
| 3100 | u_int ppr_options) |
| 3101 | { |
| 3102 | if (offset == 0) |
| 3103 | period = AHC_ASYNC_XFER_PERIOD; |
Matthew Wilcox | 6ea3c0b | 2006-02-07 07:54:46 -0700 | [diff] [blame] | 3104 | ahc->msgout_index += spi_populate_ppr_msg( |
| 3105 | ahc->msgout_buf + ahc->msgout_index, period, offset, |
| 3106 | bus_width, ppr_options); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3107 | ahc->msgout_len += 8; |
| 3108 | if (bootverbose) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3109 | printk("(%s:%c:%d:%d): Sending PPR bus_width %x, period %x, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3110 | "offset %x, ppr_options %x\n", ahc_name(ahc), |
| 3111 | devinfo->channel, devinfo->target, devinfo->lun, |
| 3112 | bus_width, period, offset, ppr_options); |
| 3113 | } |
| 3114 | } |
| 3115 | |
| 3116 | /* |
| 3117 | * Clear any active message state. |
| 3118 | */ |
| 3119 | static void |
| 3120 | ahc_clear_msg_state(struct ahc_softc *ahc) |
| 3121 | { |
| 3122 | ahc->msgout_len = 0; |
| 3123 | ahc->msgin_index = 0; |
| 3124 | ahc->msg_type = MSG_TYPE_NONE; |
| 3125 | if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0) { |
| 3126 | /* |
| 3127 | * The target didn't care to respond to our |
| 3128 | * message request, so clear ATN. |
| 3129 | */ |
| 3130 | ahc_outb(ahc, CLRSINT1, CLRATNO); |
| 3131 | } |
| 3132 | ahc_outb(ahc, MSG_OUT, MSG_NOOP); |
| 3133 | ahc_outb(ahc, SEQ_FLAGS2, |
| 3134 | ahc_inb(ahc, SEQ_FLAGS2) & ~TARGET_MSG_PENDING); |
| 3135 | } |
| 3136 | |
| 3137 | static void |
| 3138 | ahc_handle_proto_violation(struct ahc_softc *ahc) |
| 3139 | { |
| 3140 | struct ahc_devinfo devinfo; |
| 3141 | struct scb *scb; |
| 3142 | u_int scbid; |
| 3143 | u_int seq_flags; |
| 3144 | u_int curphase; |
| 3145 | u_int lastphase; |
| 3146 | int found; |
| 3147 | |
| 3148 | ahc_fetch_devinfo(ahc, &devinfo); |
| 3149 | scbid = ahc_inb(ahc, SCB_TAG); |
| 3150 | scb = ahc_lookup_scb(ahc, scbid); |
| 3151 | seq_flags = ahc_inb(ahc, SEQ_FLAGS); |
| 3152 | curphase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; |
| 3153 | lastphase = ahc_inb(ahc, LASTPHASE); |
| 3154 | if ((seq_flags & NOT_IDENTIFIED) != 0) { |
| 3155 | |
| 3156 | /* |
| 3157 | * The reconnecting target either did not send an |
| 3158 | * identify message, or did, but we didn't find an SCB |
| 3159 | * to match. |
| 3160 | */ |
| 3161 | ahc_print_devinfo(ahc, &devinfo); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3162 | printk("Target did not send an IDENTIFY message. " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3163 | "LASTPHASE = 0x%x.\n", lastphase); |
| 3164 | scb = NULL; |
| 3165 | } else if (scb == NULL) { |
| 3166 | /* |
| 3167 | * We don't seem to have an SCB active for this |
| 3168 | * transaction. Print an error and reset the bus. |
| 3169 | */ |
| 3170 | ahc_print_devinfo(ahc, &devinfo); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3171 | printk("No SCB found during protocol violation\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3172 | goto proto_violation_reset; |
| 3173 | } else { |
| 3174 | ahc_set_transaction_status(scb, CAM_SEQUENCE_FAIL); |
| 3175 | if ((seq_flags & NO_CDB_SENT) != 0) { |
| 3176 | ahc_print_path(ahc, scb); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3177 | printk("No or incomplete CDB sent to device.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3178 | } else if ((ahc_inb(ahc, SCB_CONTROL) & STATUS_RCVD) == 0) { |
| 3179 | /* |
| 3180 | * The target never bothered to provide status to |
| 3181 | * us prior to completing the command. Since we don't |
| 3182 | * know the disposition of this command, we must attempt |
| 3183 | * to abort it. Assert ATN and prepare to send an abort |
| 3184 | * message. |
| 3185 | */ |
| 3186 | ahc_print_path(ahc, scb); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3187 | printk("Completed command without status.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3188 | } else { |
| 3189 | ahc_print_path(ahc, scb); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3190 | printk("Unknown protocol violation.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3191 | ahc_dump_card_state(ahc); |
| 3192 | } |
| 3193 | } |
| 3194 | if ((lastphase & ~P_DATAIN_DT) == 0 |
| 3195 | || lastphase == P_COMMAND) { |
| 3196 | proto_violation_reset: |
| 3197 | /* |
| 3198 | * Target either went directly to data/command |
| 3199 | * phase or didn't respond to our ATN. |
| 3200 | * The only safe thing to do is to blow |
| 3201 | * it away with a bus reset. |
| 3202 | */ |
| 3203 | found = ahc_reset_channel(ahc, 'A', TRUE); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3204 | printk("%s: Issued Channel %c Bus Reset. " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3205 | "%d SCBs aborted\n", ahc_name(ahc), 'A', found); |
| 3206 | } else { |
| 3207 | /* |
| 3208 | * Leave the selection hardware off in case |
| 3209 | * this abort attempt will affect yet to |
| 3210 | * be sent commands. |
| 3211 | */ |
| 3212 | ahc_outb(ahc, SCSISEQ, |
| 3213 | ahc_inb(ahc, SCSISEQ) & ~ENSELO); |
| 3214 | ahc_assert_atn(ahc); |
| 3215 | ahc_outb(ahc, MSG_OUT, HOST_MSG); |
| 3216 | if (scb == NULL) { |
| 3217 | ahc_print_devinfo(ahc, &devinfo); |
| 3218 | ahc->msgout_buf[0] = MSG_ABORT_TASK; |
| 3219 | ahc->msgout_len = 1; |
| 3220 | ahc->msgout_index = 0; |
| 3221 | ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; |
| 3222 | } else { |
| 3223 | ahc_print_path(ahc, scb); |
| 3224 | scb->flags |= SCB_ABORT; |
| 3225 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3226 | printk("Protocol violation %s. Attempting to abort.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3227 | ahc_lookup_phase_entry(curphase)->phasemsg); |
| 3228 | } |
| 3229 | } |
| 3230 | |
| 3231 | /* |
| 3232 | * Manual message loop handler. |
| 3233 | */ |
| 3234 | static void |
| 3235 | ahc_handle_message_phase(struct ahc_softc *ahc) |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 3236 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3237 | struct ahc_devinfo devinfo; |
| 3238 | u_int bus_phase; |
| 3239 | int end_session; |
| 3240 | |
| 3241 | ahc_fetch_devinfo(ahc, &devinfo); |
| 3242 | end_session = FALSE; |
| 3243 | bus_phase = ahc_inb(ahc, SCSISIGI) & PHASE_MASK; |
| 3244 | |
| 3245 | reswitch: |
| 3246 | switch (ahc->msg_type) { |
| 3247 | case MSG_TYPE_INITIATOR_MSGOUT: |
| 3248 | { |
| 3249 | int lastbyte; |
| 3250 | int phasemis; |
| 3251 | int msgdone; |
| 3252 | |
| 3253 | if (ahc->msgout_len == 0) |
| 3254 | panic("HOST_MSG_LOOP interrupt with no active message"); |
| 3255 | |
| 3256 | #ifdef AHC_DEBUG |
| 3257 | if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { |
| 3258 | ahc_print_devinfo(ahc, &devinfo); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3259 | printk("INITIATOR_MSG_OUT"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3260 | } |
| 3261 | #endif |
| 3262 | phasemis = bus_phase != P_MESGOUT; |
| 3263 | if (phasemis) { |
| 3264 | #ifdef AHC_DEBUG |
| 3265 | if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3266 | printk(" PHASEMIS %s\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3267 | ahc_lookup_phase_entry(bus_phase) |
| 3268 | ->phasemsg); |
| 3269 | } |
| 3270 | #endif |
| 3271 | if (bus_phase == P_MESGIN) { |
| 3272 | /* |
| 3273 | * Change gears and see if |
| 3274 | * this messages is of interest to |
| 3275 | * us or should be passed back to |
| 3276 | * the sequencer. |
| 3277 | */ |
| 3278 | ahc_outb(ahc, CLRSINT1, CLRATNO); |
| 3279 | ahc->send_msg_perror = FALSE; |
| 3280 | ahc->msg_type = MSG_TYPE_INITIATOR_MSGIN; |
| 3281 | ahc->msgin_index = 0; |
| 3282 | goto reswitch; |
| 3283 | } |
| 3284 | end_session = TRUE; |
| 3285 | break; |
| 3286 | } |
| 3287 | |
| 3288 | if (ahc->send_msg_perror) { |
| 3289 | ahc_outb(ahc, CLRSINT1, CLRATNO); |
| 3290 | ahc_outb(ahc, CLRSINT1, CLRREQINIT); |
| 3291 | #ifdef AHC_DEBUG |
| 3292 | if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3293 | printk(" byte 0x%x\n", ahc->send_msg_perror); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3294 | #endif |
| 3295 | ahc_outb(ahc, SCSIDATL, MSG_PARITY_ERROR); |
| 3296 | break; |
| 3297 | } |
| 3298 | |
| 3299 | msgdone = ahc->msgout_index == ahc->msgout_len; |
| 3300 | if (msgdone) { |
| 3301 | /* |
| 3302 | * The target has requested a retry. |
| 3303 | * Re-assert ATN, reset our message index to |
| 3304 | * 0, and try again. |
| 3305 | */ |
| 3306 | ahc->msgout_index = 0; |
| 3307 | ahc_assert_atn(ahc); |
| 3308 | } |
| 3309 | |
| 3310 | lastbyte = ahc->msgout_index == (ahc->msgout_len - 1); |
| 3311 | if (lastbyte) { |
| 3312 | /* Last byte is signified by dropping ATN */ |
| 3313 | ahc_outb(ahc, CLRSINT1, CLRATNO); |
| 3314 | } |
| 3315 | |
| 3316 | /* |
| 3317 | * Clear our interrupt status and present |
| 3318 | * the next byte on the bus. |
| 3319 | */ |
| 3320 | ahc_outb(ahc, CLRSINT1, CLRREQINIT); |
| 3321 | #ifdef AHC_DEBUG |
| 3322 | if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3323 | printk(" byte 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3324 | ahc->msgout_buf[ahc->msgout_index]); |
| 3325 | #endif |
| 3326 | ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]); |
| 3327 | break; |
| 3328 | } |
| 3329 | case MSG_TYPE_INITIATOR_MSGIN: |
| 3330 | { |
| 3331 | int phasemis; |
| 3332 | int message_done; |
| 3333 | |
| 3334 | #ifdef AHC_DEBUG |
| 3335 | if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { |
| 3336 | ahc_print_devinfo(ahc, &devinfo); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3337 | printk("INITIATOR_MSG_IN"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3338 | } |
| 3339 | #endif |
| 3340 | phasemis = bus_phase != P_MESGIN; |
| 3341 | if (phasemis) { |
| 3342 | #ifdef AHC_DEBUG |
| 3343 | if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3344 | printk(" PHASEMIS %s\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3345 | ahc_lookup_phase_entry(bus_phase) |
| 3346 | ->phasemsg); |
| 3347 | } |
| 3348 | #endif |
| 3349 | ahc->msgin_index = 0; |
| 3350 | if (bus_phase == P_MESGOUT |
| 3351 | && (ahc->send_msg_perror == TRUE |
| 3352 | || (ahc->msgout_len != 0 |
| 3353 | && ahc->msgout_index == 0))) { |
| 3354 | ahc->msg_type = MSG_TYPE_INITIATOR_MSGOUT; |
| 3355 | goto reswitch; |
| 3356 | } |
| 3357 | end_session = TRUE; |
| 3358 | break; |
| 3359 | } |
| 3360 | |
| 3361 | /* Pull the byte in without acking it */ |
| 3362 | ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIBUSL); |
| 3363 | #ifdef AHC_DEBUG |
| 3364 | if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3365 | printk(" byte 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3366 | ahc->msgin_buf[ahc->msgin_index]); |
| 3367 | #endif |
| 3368 | |
| 3369 | message_done = ahc_parse_msg(ahc, &devinfo); |
| 3370 | |
| 3371 | if (message_done) { |
| 3372 | /* |
| 3373 | * Clear our incoming message buffer in case there |
| 3374 | * is another message following this one. |
| 3375 | */ |
| 3376 | ahc->msgin_index = 0; |
| 3377 | |
| 3378 | /* |
| 3379 | * If this message illicited a response, |
| 3380 | * assert ATN so the target takes us to the |
| 3381 | * message out phase. |
| 3382 | */ |
| 3383 | if (ahc->msgout_len != 0) { |
| 3384 | #ifdef AHC_DEBUG |
| 3385 | if ((ahc_debug & AHC_SHOW_MESSAGES) != 0) { |
| 3386 | ahc_print_devinfo(ahc, &devinfo); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3387 | printk("Asserting ATN for response\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3388 | } |
| 3389 | #endif |
| 3390 | ahc_assert_atn(ahc); |
| 3391 | } |
| 3392 | } else |
| 3393 | ahc->msgin_index++; |
| 3394 | |
| 3395 | if (message_done == MSGLOOP_TERMINATED) { |
| 3396 | end_session = TRUE; |
| 3397 | } else { |
| 3398 | /* Ack the byte */ |
| 3399 | ahc_outb(ahc, CLRSINT1, CLRREQINIT); |
| 3400 | ahc_inb(ahc, SCSIDATL); |
| 3401 | } |
| 3402 | break; |
| 3403 | } |
| 3404 | case MSG_TYPE_TARGET_MSGIN: |
| 3405 | { |
| 3406 | int msgdone; |
| 3407 | int msgout_request; |
| 3408 | |
| 3409 | if (ahc->msgout_len == 0) |
| 3410 | panic("Target MSGIN with no active message"); |
| 3411 | |
| 3412 | /* |
| 3413 | * If we interrupted a mesgout session, the initiator |
| 3414 | * will not know this until our first REQ. So, we |
| 3415 | * only honor mesgout requests after we've sent our |
| 3416 | * first byte. |
| 3417 | */ |
| 3418 | if ((ahc_inb(ahc, SCSISIGI) & ATNI) != 0 |
| 3419 | && ahc->msgout_index > 0) |
| 3420 | msgout_request = TRUE; |
| 3421 | else |
| 3422 | msgout_request = FALSE; |
| 3423 | |
| 3424 | if (msgout_request) { |
| 3425 | |
| 3426 | /* |
| 3427 | * Change gears and see if |
| 3428 | * this messages is of interest to |
| 3429 | * us or should be passed back to |
| 3430 | * the sequencer. |
| 3431 | */ |
| 3432 | ahc->msg_type = MSG_TYPE_TARGET_MSGOUT; |
| 3433 | ahc_outb(ahc, SCSISIGO, P_MESGOUT | BSYO); |
| 3434 | ahc->msgin_index = 0; |
| 3435 | /* Dummy read to REQ for first byte */ |
| 3436 | ahc_inb(ahc, SCSIDATL); |
| 3437 | ahc_outb(ahc, SXFRCTL0, |
| 3438 | ahc_inb(ahc, SXFRCTL0) | SPIOEN); |
| 3439 | break; |
| 3440 | } |
| 3441 | |
| 3442 | msgdone = ahc->msgout_index == ahc->msgout_len; |
| 3443 | if (msgdone) { |
| 3444 | ahc_outb(ahc, SXFRCTL0, |
| 3445 | ahc_inb(ahc, SXFRCTL0) & ~SPIOEN); |
| 3446 | end_session = TRUE; |
| 3447 | break; |
| 3448 | } |
| 3449 | |
| 3450 | /* |
| 3451 | * Present the next byte on the bus. |
| 3452 | */ |
| 3453 | ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) | SPIOEN); |
| 3454 | ahc_outb(ahc, SCSIDATL, ahc->msgout_buf[ahc->msgout_index++]); |
| 3455 | break; |
| 3456 | } |
| 3457 | case MSG_TYPE_TARGET_MSGOUT: |
| 3458 | { |
| 3459 | int lastbyte; |
| 3460 | int msgdone; |
| 3461 | |
| 3462 | /* |
| 3463 | * The initiator signals that this is |
| 3464 | * the last byte by dropping ATN. |
| 3465 | */ |
| 3466 | lastbyte = (ahc_inb(ahc, SCSISIGI) & ATNI) == 0; |
| 3467 | |
| 3468 | /* |
| 3469 | * Read the latched byte, but turn off SPIOEN first |
| 3470 | * so that we don't inadvertently cause a REQ for the |
| 3471 | * next byte. |
| 3472 | */ |
| 3473 | ahc_outb(ahc, SXFRCTL0, ahc_inb(ahc, SXFRCTL0) & ~SPIOEN); |
| 3474 | ahc->msgin_buf[ahc->msgin_index] = ahc_inb(ahc, SCSIDATL); |
| 3475 | msgdone = ahc_parse_msg(ahc, &devinfo); |
| 3476 | if (msgdone == MSGLOOP_TERMINATED) { |
| 3477 | /* |
| 3478 | * The message is *really* done in that it caused |
| 3479 | * us to go to bus free. The sequencer has already |
| 3480 | * been reset at this point, so pull the ejection |
| 3481 | * handle. |
| 3482 | */ |
| 3483 | return; |
| 3484 | } |
| 3485 | |
| 3486 | ahc->msgin_index++; |
| 3487 | |
| 3488 | /* |
| 3489 | * XXX Read spec about initiator dropping ATN too soon |
| 3490 | * and use msgdone to detect it. |
| 3491 | */ |
| 3492 | if (msgdone == MSGLOOP_MSGCOMPLETE) { |
| 3493 | ahc->msgin_index = 0; |
| 3494 | |
| 3495 | /* |
| 3496 | * If this message illicited a response, transition |
| 3497 | * to the Message in phase and send it. |
| 3498 | */ |
| 3499 | if (ahc->msgout_len != 0) { |
| 3500 | ahc_outb(ahc, SCSISIGO, P_MESGIN | BSYO); |
| 3501 | ahc_outb(ahc, SXFRCTL0, |
| 3502 | ahc_inb(ahc, SXFRCTL0) | SPIOEN); |
| 3503 | ahc->msg_type = MSG_TYPE_TARGET_MSGIN; |
| 3504 | ahc->msgin_index = 0; |
| 3505 | break; |
| 3506 | } |
| 3507 | } |
| 3508 | |
| 3509 | if (lastbyte) |
| 3510 | end_session = TRUE; |
| 3511 | else { |
| 3512 | /* Ask for the next byte. */ |
| 3513 | ahc_outb(ahc, SXFRCTL0, |
| 3514 | ahc_inb(ahc, SXFRCTL0) | SPIOEN); |
| 3515 | } |
| 3516 | |
| 3517 | break; |
| 3518 | } |
| 3519 | default: |
| 3520 | panic("Unknown REQINIT message type"); |
| 3521 | } |
| 3522 | |
| 3523 | if (end_session) { |
| 3524 | ahc_clear_msg_state(ahc); |
| 3525 | ahc_outb(ahc, RETURN_1, EXIT_MSG_LOOP); |
| 3526 | } else |
| 3527 | ahc_outb(ahc, RETURN_1, CONT_MSG_LOOP); |
| 3528 | } |
| 3529 | |
| 3530 | /* |
| 3531 | * See if we sent a particular extended message to the target. |
| 3532 | * If "full" is true, return true only if the target saw the full |
| 3533 | * message. If "full" is false, return true if the target saw at |
| 3534 | * least the first byte of the message. |
| 3535 | */ |
| 3536 | static int |
| 3537 | ahc_sent_msg(struct ahc_softc *ahc, ahc_msgtype type, u_int msgval, int full) |
| 3538 | { |
| 3539 | int found; |
| 3540 | u_int index; |
| 3541 | |
| 3542 | found = FALSE; |
| 3543 | index = 0; |
| 3544 | |
| 3545 | while (index < ahc->msgout_len) { |
| 3546 | if (ahc->msgout_buf[index] == MSG_EXTENDED) { |
| 3547 | u_int end_index; |
| 3548 | |
| 3549 | end_index = index + 1 + ahc->msgout_buf[index + 1]; |
| 3550 | if (ahc->msgout_buf[index+2] == msgval |
| 3551 | && type == AHCMSG_EXT) { |
| 3552 | |
| 3553 | if (full) { |
| 3554 | if (ahc->msgout_index > end_index) |
| 3555 | found = TRUE; |
| 3556 | } else if (ahc->msgout_index > index) |
| 3557 | found = TRUE; |
| 3558 | } |
| 3559 | index = end_index; |
| 3560 | } else if (ahc->msgout_buf[index] >= MSG_SIMPLE_TASK |
| 3561 | && ahc->msgout_buf[index] <= MSG_IGN_WIDE_RESIDUE) { |
| 3562 | |
| 3563 | /* Skip tag type and tag id or residue param*/ |
| 3564 | index += 2; |
| 3565 | } else { |
| 3566 | /* Single byte message */ |
| 3567 | if (type == AHCMSG_1B |
| 3568 | && ahc->msgout_buf[index] == msgval |
| 3569 | && ahc->msgout_index > index) |
| 3570 | found = TRUE; |
| 3571 | index++; |
| 3572 | } |
| 3573 | |
| 3574 | if (found) |
| 3575 | break; |
| 3576 | } |
| 3577 | return (found); |
| 3578 | } |
| 3579 | |
| 3580 | /* |
| 3581 | * Wait for a complete incoming message, parse it, and respond accordingly. |
| 3582 | */ |
| 3583 | static int |
| 3584 | ahc_parse_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) |
| 3585 | { |
| 3586 | struct ahc_initiator_tinfo *tinfo; |
| 3587 | struct ahc_tmode_tstate *tstate; |
| 3588 | int reject; |
| 3589 | int done; |
| 3590 | int response; |
| 3591 | u_int targ_scsirate; |
| 3592 | |
| 3593 | done = MSGLOOP_IN_PROG; |
| 3594 | response = FALSE; |
| 3595 | reject = FALSE; |
| 3596 | tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, devinfo->our_scsiid, |
| 3597 | devinfo->target, &tstate); |
| 3598 | targ_scsirate = tinfo->scsirate; |
| 3599 | |
| 3600 | /* |
| 3601 | * Parse as much of the message as is available, |
| 3602 | * rejecting it if we don't support it. When |
| 3603 | * the entire message is available and has been |
| 3604 | * handled, return MSGLOOP_MSGCOMPLETE, indicating |
| 3605 | * that we have parsed an entire message. |
| 3606 | * |
| 3607 | * In the case of extended messages, we accept the length |
| 3608 | * byte outright and perform more checking once we know the |
| 3609 | * extended message type. |
| 3610 | */ |
| 3611 | switch (ahc->msgin_buf[0]) { |
| 3612 | case MSG_DISCONNECT: |
| 3613 | case MSG_SAVEDATAPOINTER: |
| 3614 | case MSG_CMDCOMPLETE: |
| 3615 | case MSG_RESTOREPOINTERS: |
| 3616 | case MSG_IGN_WIDE_RESIDUE: |
| 3617 | /* |
| 3618 | * End our message loop as these are messages |
| 3619 | * the sequencer handles on its own. |
| 3620 | */ |
| 3621 | done = MSGLOOP_TERMINATED; |
| 3622 | break; |
| 3623 | case MSG_MESSAGE_REJECT: |
| 3624 | response = ahc_handle_msg_reject(ahc, devinfo); |
| 3625 | /* FALLTHROUGH */ |
| 3626 | case MSG_NOOP: |
| 3627 | done = MSGLOOP_MSGCOMPLETE; |
| 3628 | break; |
| 3629 | case MSG_EXTENDED: |
| 3630 | { |
| 3631 | /* Wait for enough of the message to begin validation */ |
| 3632 | if (ahc->msgin_index < 2) |
| 3633 | break; |
| 3634 | switch (ahc->msgin_buf[2]) { |
| 3635 | case MSG_EXT_SDTR: |
| 3636 | { |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 3637 | const struct ahc_syncrate *syncrate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3638 | u_int period; |
| 3639 | u_int ppr_options; |
| 3640 | u_int offset; |
| 3641 | u_int saved_offset; |
| 3642 | |
| 3643 | if (ahc->msgin_buf[1] != MSG_EXT_SDTR_LEN) { |
| 3644 | reject = TRUE; |
| 3645 | break; |
| 3646 | } |
| 3647 | |
| 3648 | /* |
| 3649 | * Wait until we have both args before validating |
| 3650 | * and acting on this message. |
| 3651 | * |
| 3652 | * Add one to MSG_EXT_SDTR_LEN to account for |
| 3653 | * the extended message preamble. |
| 3654 | */ |
| 3655 | if (ahc->msgin_index < (MSG_EXT_SDTR_LEN + 1)) |
| 3656 | break; |
| 3657 | |
| 3658 | period = ahc->msgin_buf[3]; |
| 3659 | ppr_options = 0; |
| 3660 | saved_offset = offset = ahc->msgin_buf[4]; |
| 3661 | syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period, |
| 3662 | &ppr_options, |
| 3663 | devinfo->role); |
| 3664 | ahc_validate_offset(ahc, tinfo, syncrate, &offset, |
| 3665 | targ_scsirate & WIDEXFER, |
| 3666 | devinfo->role); |
| 3667 | if (bootverbose) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3668 | printk("(%s:%c:%d:%d): Received " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3669 | "SDTR period %x, offset %x\n\t" |
| 3670 | "Filtered to period %x, offset %x\n", |
| 3671 | ahc_name(ahc), devinfo->channel, |
| 3672 | devinfo->target, devinfo->lun, |
| 3673 | ahc->msgin_buf[3], saved_offset, |
| 3674 | period, offset); |
| 3675 | } |
| 3676 | ahc_set_syncrate(ahc, devinfo, |
| 3677 | syncrate, period, |
| 3678 | offset, ppr_options, |
| 3679 | AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, |
| 3680 | /*paused*/TRUE); |
| 3681 | |
| 3682 | /* |
| 3683 | * See if we initiated Sync Negotiation |
| 3684 | * and didn't have to fall down to async |
| 3685 | * transfers. |
| 3686 | */ |
| 3687 | if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, TRUE)) { |
| 3688 | /* We started it */ |
| 3689 | if (saved_offset != offset) { |
| 3690 | /* Went too low - force async */ |
| 3691 | reject = TRUE; |
| 3692 | } |
| 3693 | } else { |
| 3694 | /* |
| 3695 | * Send our own SDTR in reply |
| 3696 | */ |
| 3697 | if (bootverbose |
| 3698 | && devinfo->role == ROLE_INITIATOR) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3699 | printk("(%s:%c:%d:%d): Target " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3700 | "Initiated SDTR\n", |
| 3701 | ahc_name(ahc), devinfo->channel, |
| 3702 | devinfo->target, devinfo->lun); |
| 3703 | } |
| 3704 | ahc->msgout_index = 0; |
| 3705 | ahc->msgout_len = 0; |
| 3706 | ahc_construct_sdtr(ahc, devinfo, |
| 3707 | period, offset); |
| 3708 | ahc->msgout_index = 0; |
| 3709 | response = TRUE; |
| 3710 | } |
| 3711 | done = MSGLOOP_MSGCOMPLETE; |
| 3712 | break; |
| 3713 | } |
| 3714 | case MSG_EXT_WDTR: |
| 3715 | { |
| 3716 | u_int bus_width; |
| 3717 | u_int saved_width; |
| 3718 | u_int sending_reply; |
| 3719 | |
| 3720 | sending_reply = FALSE; |
| 3721 | if (ahc->msgin_buf[1] != MSG_EXT_WDTR_LEN) { |
| 3722 | reject = TRUE; |
| 3723 | break; |
| 3724 | } |
| 3725 | |
| 3726 | /* |
| 3727 | * Wait until we have our arg before validating |
| 3728 | * and acting on this message. |
| 3729 | * |
| 3730 | * Add one to MSG_EXT_WDTR_LEN to account for |
| 3731 | * the extended message preamble. |
| 3732 | */ |
| 3733 | if (ahc->msgin_index < (MSG_EXT_WDTR_LEN + 1)) |
| 3734 | break; |
| 3735 | |
| 3736 | bus_width = ahc->msgin_buf[3]; |
| 3737 | saved_width = bus_width; |
| 3738 | ahc_validate_width(ahc, tinfo, &bus_width, |
| 3739 | devinfo->role); |
| 3740 | if (bootverbose) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3741 | printk("(%s:%c:%d:%d): Received WDTR " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3742 | "%x filtered to %x\n", |
| 3743 | ahc_name(ahc), devinfo->channel, |
| 3744 | devinfo->target, devinfo->lun, |
| 3745 | saved_width, bus_width); |
| 3746 | } |
| 3747 | |
| 3748 | if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, TRUE)) { |
| 3749 | /* |
| 3750 | * Don't send a WDTR back to the |
| 3751 | * target, since we asked first. |
| 3752 | * If the width went higher than our |
| 3753 | * request, reject it. |
| 3754 | */ |
| 3755 | if (saved_width > bus_width) { |
| 3756 | reject = TRUE; |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3757 | printk("(%s:%c:%d:%d): requested %dBit " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3758 | "transfers. Rejecting...\n", |
| 3759 | ahc_name(ahc), devinfo->channel, |
| 3760 | devinfo->target, devinfo->lun, |
| 3761 | 8 * (0x01 << bus_width)); |
| 3762 | bus_width = 0; |
| 3763 | } |
| 3764 | } else { |
| 3765 | /* |
| 3766 | * Send our own WDTR in reply |
| 3767 | */ |
| 3768 | if (bootverbose |
| 3769 | && devinfo->role == ROLE_INITIATOR) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3770 | printk("(%s:%c:%d:%d): Target " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3771 | "Initiated WDTR\n", |
| 3772 | ahc_name(ahc), devinfo->channel, |
| 3773 | devinfo->target, devinfo->lun); |
| 3774 | } |
| 3775 | ahc->msgout_index = 0; |
| 3776 | ahc->msgout_len = 0; |
| 3777 | ahc_construct_wdtr(ahc, devinfo, bus_width); |
| 3778 | ahc->msgout_index = 0; |
| 3779 | response = TRUE; |
| 3780 | sending_reply = TRUE; |
| 3781 | } |
| 3782 | /* |
| 3783 | * After a wide message, we are async, but |
| 3784 | * some devices don't seem to honor this portion |
| 3785 | * of the spec. Force a renegotiation of the |
| 3786 | * sync component of our transfer agreement even |
| 3787 | * if our goal is async. By updating our width |
| 3788 | * after forcing the negotiation, we avoid |
| 3789 | * renegotiating for width. |
| 3790 | */ |
| 3791 | ahc_update_neg_request(ahc, devinfo, tstate, |
| 3792 | tinfo, AHC_NEG_ALWAYS); |
| 3793 | ahc_set_width(ahc, devinfo, bus_width, |
| 3794 | AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, |
| 3795 | /*paused*/TRUE); |
| 3796 | if (sending_reply == FALSE && reject == FALSE) { |
| 3797 | |
| 3798 | /* |
| 3799 | * We will always have an SDTR to send. |
| 3800 | */ |
| 3801 | ahc->msgout_index = 0; |
| 3802 | ahc->msgout_len = 0; |
| 3803 | ahc_build_transfer_msg(ahc, devinfo); |
| 3804 | ahc->msgout_index = 0; |
| 3805 | response = TRUE; |
| 3806 | } |
| 3807 | done = MSGLOOP_MSGCOMPLETE; |
| 3808 | break; |
| 3809 | } |
| 3810 | case MSG_EXT_PPR: |
| 3811 | { |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 3812 | const struct ahc_syncrate *syncrate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3813 | u_int period; |
| 3814 | u_int offset; |
| 3815 | u_int bus_width; |
| 3816 | u_int ppr_options; |
| 3817 | u_int saved_width; |
| 3818 | u_int saved_offset; |
| 3819 | u_int saved_ppr_options; |
| 3820 | |
| 3821 | if (ahc->msgin_buf[1] != MSG_EXT_PPR_LEN) { |
| 3822 | reject = TRUE; |
| 3823 | break; |
| 3824 | } |
| 3825 | |
| 3826 | /* |
| 3827 | * Wait until we have all args before validating |
| 3828 | * and acting on this message. |
| 3829 | * |
| 3830 | * Add one to MSG_EXT_PPR_LEN to account for |
| 3831 | * the extended message preamble. |
| 3832 | */ |
| 3833 | if (ahc->msgin_index < (MSG_EXT_PPR_LEN + 1)) |
| 3834 | break; |
| 3835 | |
| 3836 | period = ahc->msgin_buf[3]; |
| 3837 | offset = ahc->msgin_buf[5]; |
| 3838 | bus_width = ahc->msgin_buf[6]; |
| 3839 | saved_width = bus_width; |
| 3840 | ppr_options = ahc->msgin_buf[7]; |
| 3841 | /* |
| 3842 | * According to the spec, a DT only |
| 3843 | * period factor with no DT option |
| 3844 | * set implies async. |
| 3845 | */ |
| 3846 | if ((ppr_options & MSG_EXT_PPR_DT_REQ) == 0 |
| 3847 | && period == 9) |
| 3848 | offset = 0; |
| 3849 | saved_ppr_options = ppr_options; |
| 3850 | saved_offset = offset; |
| 3851 | |
| 3852 | /* |
| 3853 | * Mask out any options we don't support |
| 3854 | * on any controller. Transfer options are |
| 3855 | * only available if we are negotiating wide. |
| 3856 | */ |
| 3857 | ppr_options &= MSG_EXT_PPR_DT_REQ; |
| 3858 | if (bus_width == 0) |
| 3859 | ppr_options = 0; |
| 3860 | |
| 3861 | ahc_validate_width(ahc, tinfo, &bus_width, |
| 3862 | devinfo->role); |
| 3863 | syncrate = ahc_devlimited_syncrate(ahc, tinfo, &period, |
| 3864 | &ppr_options, |
| 3865 | devinfo->role); |
| 3866 | ahc_validate_offset(ahc, tinfo, syncrate, |
| 3867 | &offset, bus_width, |
| 3868 | devinfo->role); |
| 3869 | |
| 3870 | if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, TRUE)) { |
| 3871 | /* |
| 3872 | * If we are unable to do any of the |
| 3873 | * requested options (we went too low), |
| 3874 | * then we'll have to reject the message. |
| 3875 | */ |
| 3876 | if (saved_width > bus_width |
| 3877 | || saved_offset != offset |
| 3878 | || saved_ppr_options != ppr_options) { |
| 3879 | reject = TRUE; |
| 3880 | period = 0; |
| 3881 | offset = 0; |
| 3882 | bus_width = 0; |
| 3883 | ppr_options = 0; |
| 3884 | syncrate = NULL; |
| 3885 | } |
| 3886 | } else { |
| 3887 | if (devinfo->role != ROLE_TARGET) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3888 | printk("(%s:%c:%d:%d): Target " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3889 | "Initiated PPR\n", |
| 3890 | ahc_name(ahc), devinfo->channel, |
| 3891 | devinfo->target, devinfo->lun); |
| 3892 | else |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3893 | printk("(%s:%c:%d:%d): Initiator " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3894 | "Initiated PPR\n", |
| 3895 | ahc_name(ahc), devinfo->channel, |
| 3896 | devinfo->target, devinfo->lun); |
| 3897 | ahc->msgout_index = 0; |
| 3898 | ahc->msgout_len = 0; |
| 3899 | ahc_construct_ppr(ahc, devinfo, period, offset, |
| 3900 | bus_width, ppr_options); |
| 3901 | ahc->msgout_index = 0; |
| 3902 | response = TRUE; |
| 3903 | } |
| 3904 | if (bootverbose) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 3905 | printk("(%s:%c:%d:%d): Received PPR width %x, " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3906 | "period %x, offset %x,options %x\n" |
| 3907 | "\tFiltered to width %x, period %x, " |
| 3908 | "offset %x, options %x\n", |
| 3909 | ahc_name(ahc), devinfo->channel, |
| 3910 | devinfo->target, devinfo->lun, |
| 3911 | saved_width, ahc->msgin_buf[3], |
| 3912 | saved_offset, saved_ppr_options, |
| 3913 | bus_width, period, offset, ppr_options); |
| 3914 | } |
| 3915 | ahc_set_width(ahc, devinfo, bus_width, |
| 3916 | AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, |
| 3917 | /*paused*/TRUE); |
| 3918 | ahc_set_syncrate(ahc, devinfo, |
| 3919 | syncrate, period, |
| 3920 | offset, ppr_options, |
| 3921 | AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, |
| 3922 | /*paused*/TRUE); |
| 3923 | done = MSGLOOP_MSGCOMPLETE; |
| 3924 | break; |
| 3925 | } |
| 3926 | default: |
| 3927 | /* Unknown extended message. Reject it. */ |
| 3928 | reject = TRUE; |
| 3929 | break; |
| 3930 | } |
| 3931 | break; |
| 3932 | } |
| 3933 | #ifdef AHC_TARGET_MODE |
| 3934 | case MSG_BUS_DEV_RESET: |
| 3935 | ahc_handle_devreset(ahc, devinfo, |
| 3936 | CAM_BDR_SENT, |
| 3937 | "Bus Device Reset Received", |
| 3938 | /*verbose_level*/0); |
| 3939 | ahc_restart(ahc); |
| 3940 | done = MSGLOOP_TERMINATED; |
| 3941 | break; |
| 3942 | case MSG_ABORT_TAG: |
| 3943 | case MSG_ABORT: |
| 3944 | case MSG_CLEAR_QUEUE: |
| 3945 | { |
| 3946 | int tag; |
| 3947 | |
| 3948 | /* Target mode messages */ |
| 3949 | if (devinfo->role != ROLE_TARGET) { |
| 3950 | reject = TRUE; |
| 3951 | break; |
| 3952 | } |
| 3953 | tag = SCB_LIST_NULL; |
| 3954 | if (ahc->msgin_buf[0] == MSG_ABORT_TAG) |
| 3955 | tag = ahc_inb(ahc, INITIATOR_TAG); |
| 3956 | ahc_abort_scbs(ahc, devinfo->target, devinfo->channel, |
| 3957 | devinfo->lun, tag, ROLE_TARGET, |
| 3958 | CAM_REQ_ABORTED); |
| 3959 | |
| 3960 | tstate = ahc->enabled_targets[devinfo->our_scsiid]; |
| 3961 | if (tstate != NULL) { |
| 3962 | struct ahc_tmode_lstate* lstate; |
| 3963 | |
| 3964 | lstate = tstate->enabled_luns[devinfo->lun]; |
| 3965 | if (lstate != NULL) { |
| 3966 | ahc_queue_lstate_event(ahc, lstate, |
| 3967 | devinfo->our_scsiid, |
| 3968 | ahc->msgin_buf[0], |
| 3969 | /*arg*/tag); |
| 3970 | ahc_send_lstate_events(ahc, lstate); |
| 3971 | } |
| 3972 | } |
| 3973 | ahc_restart(ahc); |
| 3974 | done = MSGLOOP_TERMINATED; |
| 3975 | break; |
| 3976 | } |
| 3977 | #endif |
| 3978 | case MSG_TERM_IO_PROC: |
| 3979 | default: |
| 3980 | reject = TRUE; |
| 3981 | break; |
| 3982 | } |
| 3983 | |
| 3984 | if (reject) { |
| 3985 | /* |
| 3986 | * Setup to reject the message. |
| 3987 | */ |
| 3988 | ahc->msgout_index = 0; |
| 3989 | ahc->msgout_len = 1; |
| 3990 | ahc->msgout_buf[0] = MSG_MESSAGE_REJECT; |
| 3991 | done = MSGLOOP_MSGCOMPLETE; |
| 3992 | response = TRUE; |
| 3993 | } |
| 3994 | |
| 3995 | if (done != MSGLOOP_IN_PROG && !response) |
| 3996 | /* Clear the outgoing message buffer */ |
| 3997 | ahc->msgout_len = 0; |
| 3998 | |
| 3999 | return (done); |
| 4000 | } |
| 4001 | |
| 4002 | /* |
| 4003 | * Process a message reject message. |
| 4004 | */ |
| 4005 | static int |
| 4006 | ahc_handle_msg_reject(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) |
| 4007 | { |
| 4008 | /* |
| 4009 | * What we care about here is if we had an |
| 4010 | * outstanding SDTR or WDTR message for this |
| 4011 | * target. If we did, this is a signal that |
| 4012 | * the target is refusing negotiation. |
| 4013 | */ |
| 4014 | struct scb *scb; |
| 4015 | struct ahc_initiator_tinfo *tinfo; |
| 4016 | struct ahc_tmode_tstate *tstate; |
| 4017 | u_int scb_index; |
| 4018 | u_int last_msg; |
| 4019 | int response = 0; |
| 4020 | |
| 4021 | scb_index = ahc_inb(ahc, SCB_TAG); |
| 4022 | scb = ahc_lookup_scb(ahc, scb_index); |
| 4023 | tinfo = ahc_fetch_transinfo(ahc, devinfo->channel, |
| 4024 | devinfo->our_scsiid, |
| 4025 | devinfo->target, &tstate); |
| 4026 | /* Might be necessary */ |
| 4027 | last_msg = ahc_inb(ahc, LAST_MSG); |
| 4028 | |
| 4029 | if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_PPR, /*full*/FALSE)) { |
| 4030 | /* |
| 4031 | * Target does not support the PPR message. |
| 4032 | * Attempt to negotiate SPI-2 style. |
| 4033 | */ |
| 4034 | if (bootverbose) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4035 | printk("(%s:%c:%d:%d): PPR Rejected. " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4036 | "Trying WDTR/SDTR\n", |
| 4037 | ahc_name(ahc), devinfo->channel, |
| 4038 | devinfo->target, devinfo->lun); |
| 4039 | } |
| 4040 | tinfo->goal.ppr_options = 0; |
| 4041 | tinfo->curr.transport_version = 2; |
| 4042 | tinfo->goal.transport_version = 2; |
| 4043 | ahc->msgout_index = 0; |
| 4044 | ahc->msgout_len = 0; |
| 4045 | ahc_build_transfer_msg(ahc, devinfo); |
| 4046 | ahc->msgout_index = 0; |
| 4047 | response = 1; |
| 4048 | } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_WDTR, /*full*/FALSE)) { |
| 4049 | |
| 4050 | /* note 8bit xfers */ |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4051 | printk("(%s:%c:%d:%d): refuses WIDE negotiation. Using " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4052 | "8bit transfers\n", ahc_name(ahc), |
| 4053 | devinfo->channel, devinfo->target, devinfo->lun); |
| 4054 | ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT, |
| 4055 | AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, |
| 4056 | /*paused*/TRUE); |
| 4057 | /* |
| 4058 | * No need to clear the sync rate. If the target |
| 4059 | * did not accept the command, our syncrate is |
| 4060 | * unaffected. If the target started the negotiation, |
| 4061 | * but rejected our response, we already cleared the |
| 4062 | * sync rate before sending our WDTR. |
| 4063 | */ |
| 4064 | if (tinfo->goal.offset != tinfo->curr.offset) { |
| 4065 | |
| 4066 | /* Start the sync negotiation */ |
| 4067 | ahc->msgout_index = 0; |
| 4068 | ahc->msgout_len = 0; |
| 4069 | ahc_build_transfer_msg(ahc, devinfo); |
| 4070 | ahc->msgout_index = 0; |
| 4071 | response = 1; |
| 4072 | } |
| 4073 | } else if (ahc_sent_msg(ahc, AHCMSG_EXT, MSG_EXT_SDTR, /*full*/FALSE)) { |
| 4074 | /* note asynch xfers and clear flag */ |
| 4075 | ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, /*period*/0, |
| 4076 | /*offset*/0, /*ppr_options*/0, |
| 4077 | AHC_TRANS_ACTIVE|AHC_TRANS_GOAL, |
| 4078 | /*paused*/TRUE); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4079 | printk("(%s:%c:%d:%d): refuses synchronous negotiation. " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4080 | "Using asynchronous transfers\n", |
| 4081 | ahc_name(ahc), devinfo->channel, |
| 4082 | devinfo->target, devinfo->lun); |
| 4083 | } else if ((scb->hscb->control & MSG_SIMPLE_TASK) != 0) { |
| 4084 | int tag_type; |
| 4085 | int mask; |
| 4086 | |
| 4087 | tag_type = (scb->hscb->control & MSG_SIMPLE_TASK); |
| 4088 | |
| 4089 | if (tag_type == MSG_SIMPLE_TASK) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4090 | printk("(%s:%c:%d:%d): refuses tagged commands. " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4091 | "Performing non-tagged I/O\n", ahc_name(ahc), |
| 4092 | devinfo->channel, devinfo->target, devinfo->lun); |
Hannes Reinecke | 9080063 | 2006-10-23 15:25:36 +0200 | [diff] [blame] | 4093 | ahc_set_tags(ahc, scb->io_ctx, devinfo, AHC_QUEUE_NONE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4094 | mask = ~0x23; |
| 4095 | } else { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4096 | printk("(%s:%c:%d:%d): refuses %s tagged commands. " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4097 | "Performing simple queue tagged I/O only\n", |
| 4098 | ahc_name(ahc), devinfo->channel, devinfo->target, |
| 4099 | devinfo->lun, tag_type == MSG_ORDERED_TASK |
| 4100 | ? "ordered" : "head of queue"); |
Hannes Reinecke | 9080063 | 2006-10-23 15:25:36 +0200 | [diff] [blame] | 4101 | ahc_set_tags(ahc, scb->io_ctx, devinfo, AHC_QUEUE_BASIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4102 | mask = ~0x03; |
| 4103 | } |
| 4104 | |
| 4105 | /* |
| 4106 | * Resend the identify for this CCB as the target |
| 4107 | * may believe that the selection is invalid otherwise. |
| 4108 | */ |
| 4109 | ahc_outb(ahc, SCB_CONTROL, |
| 4110 | ahc_inb(ahc, SCB_CONTROL) & mask); |
| 4111 | scb->hscb->control &= mask; |
| 4112 | ahc_set_transaction_tag(scb, /*enabled*/FALSE, |
| 4113 | /*type*/MSG_SIMPLE_TASK); |
| 4114 | ahc_outb(ahc, MSG_OUT, MSG_IDENTIFYFLAG); |
| 4115 | ahc_assert_atn(ahc); |
| 4116 | |
| 4117 | /* |
| 4118 | * This transaction is now at the head of |
| 4119 | * the untagged queue for this target. |
| 4120 | */ |
| 4121 | if ((ahc->flags & AHC_SCB_BTT) == 0) { |
| 4122 | struct scb_tailq *untagged_q; |
| 4123 | |
| 4124 | untagged_q = |
| 4125 | &(ahc->untagged_queues[devinfo->target_offset]); |
| 4126 | TAILQ_INSERT_HEAD(untagged_q, scb, links.tqe); |
| 4127 | scb->flags |= SCB_UNTAGGEDQ; |
| 4128 | } |
| 4129 | ahc_busy_tcl(ahc, BUILD_TCL(scb->hscb->scsiid, devinfo->lun), |
| 4130 | scb->hscb->tag); |
| 4131 | |
| 4132 | /* |
| 4133 | * Requeue all tagged commands for this target |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 4134 | * currently in our possession so they can be |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4135 | * converted to untagged commands. |
| 4136 | */ |
| 4137 | ahc_search_qinfifo(ahc, SCB_GET_TARGET(ahc, scb), |
| 4138 | SCB_GET_CHANNEL(ahc, scb), |
| 4139 | SCB_GET_LUN(scb), /*tag*/SCB_LIST_NULL, |
| 4140 | ROLE_INITIATOR, CAM_REQUEUE_REQ, |
| 4141 | SEARCH_COMPLETE); |
| 4142 | } else { |
| 4143 | /* |
| 4144 | * Otherwise, we ignore it. |
| 4145 | */ |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4146 | printk("%s:%c:%d: Message reject for %x -- ignored\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4147 | ahc_name(ahc), devinfo->channel, devinfo->target, |
| 4148 | last_msg); |
| 4149 | } |
| 4150 | return (response); |
| 4151 | } |
| 4152 | |
| 4153 | /* |
| 4154 | * Process an ingnore wide residue message. |
| 4155 | */ |
| 4156 | static void |
| 4157 | ahc_handle_ign_wide_residue(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) |
| 4158 | { |
| 4159 | u_int scb_index; |
| 4160 | struct scb *scb; |
| 4161 | |
| 4162 | scb_index = ahc_inb(ahc, SCB_TAG); |
| 4163 | scb = ahc_lookup_scb(ahc, scb_index); |
| 4164 | /* |
| 4165 | * XXX Actually check data direction in the sequencer? |
| 4166 | * Perhaps add datadir to some spare bits in the hscb? |
| 4167 | */ |
| 4168 | if ((ahc_inb(ahc, SEQ_FLAGS) & DPHASE) == 0 |
| 4169 | || ahc_get_transfer_dir(scb) != CAM_DIR_IN) { |
| 4170 | /* |
| 4171 | * Ignore the message if we haven't |
| 4172 | * seen an appropriate data phase yet. |
| 4173 | */ |
| 4174 | } else { |
| 4175 | /* |
| 4176 | * If the residual occurred on the last |
| 4177 | * transfer and the transfer request was |
| 4178 | * expected to end on an odd count, do |
| 4179 | * nothing. Otherwise, subtract a byte |
| 4180 | * and update the residual count accordingly. |
| 4181 | */ |
| 4182 | uint32_t sgptr; |
| 4183 | |
| 4184 | sgptr = ahc_inb(ahc, SCB_RESIDUAL_SGPTR); |
| 4185 | if ((sgptr & SG_LIST_NULL) != 0 |
| 4186 | && (ahc_inb(ahc, SCB_LUN) & SCB_XFERLEN_ODD) != 0) { |
| 4187 | /* |
| 4188 | * If the residual occurred on the last |
| 4189 | * transfer and the transfer request was |
| 4190 | * expected to end on an odd count, do |
| 4191 | * nothing. |
| 4192 | */ |
| 4193 | } else { |
| 4194 | struct ahc_dma_seg *sg; |
| 4195 | uint32_t data_cnt; |
| 4196 | uint32_t data_addr; |
| 4197 | uint32_t sglen; |
| 4198 | |
| 4199 | /* Pull in all of the sgptr */ |
| 4200 | sgptr = ahc_inl(ahc, SCB_RESIDUAL_SGPTR); |
| 4201 | data_cnt = ahc_inl(ahc, SCB_RESIDUAL_DATACNT); |
| 4202 | |
| 4203 | if ((sgptr & SG_LIST_NULL) != 0) { |
| 4204 | /* |
| 4205 | * The residual data count is not updated |
| 4206 | * for the command run to completion case. |
| 4207 | * Explicitly zero the count. |
| 4208 | */ |
| 4209 | data_cnt &= ~AHC_SG_LEN_MASK; |
| 4210 | } |
| 4211 | |
| 4212 | data_addr = ahc_inl(ahc, SHADDR); |
| 4213 | |
| 4214 | data_cnt += 1; |
| 4215 | data_addr -= 1; |
| 4216 | sgptr &= SG_PTR_MASK; |
| 4217 | |
| 4218 | sg = ahc_sg_bus_to_virt(scb, sgptr); |
| 4219 | |
| 4220 | /* |
| 4221 | * The residual sg ptr points to the next S/G |
| 4222 | * to load so we must go back one. |
| 4223 | */ |
| 4224 | sg--; |
| 4225 | sglen = ahc_le32toh(sg->len) & AHC_SG_LEN_MASK; |
| 4226 | if (sg != scb->sg_list |
| 4227 | && sglen < (data_cnt & AHC_SG_LEN_MASK)) { |
| 4228 | |
| 4229 | sg--; |
| 4230 | sglen = ahc_le32toh(sg->len); |
| 4231 | /* |
| 4232 | * Preserve High Address and SG_LIST bits |
| 4233 | * while setting the count to 1. |
| 4234 | */ |
| 4235 | data_cnt = 1 | (sglen & (~AHC_SG_LEN_MASK)); |
| 4236 | data_addr = ahc_le32toh(sg->addr) |
| 4237 | + (sglen & AHC_SG_LEN_MASK) - 1; |
| 4238 | |
| 4239 | /* |
| 4240 | * Increment sg so it points to the |
| 4241 | * "next" sg. |
| 4242 | */ |
| 4243 | sg++; |
| 4244 | sgptr = ahc_sg_virt_to_bus(scb, sg); |
| 4245 | } |
| 4246 | ahc_outl(ahc, SCB_RESIDUAL_SGPTR, sgptr); |
| 4247 | ahc_outl(ahc, SCB_RESIDUAL_DATACNT, data_cnt); |
| 4248 | /* |
| 4249 | * Toggle the "oddness" of the transfer length |
| 4250 | * to handle this mid-transfer ignore wide |
| 4251 | * residue. This ensures that the oddness is |
| 4252 | * correct for subsequent data transfers. |
| 4253 | */ |
| 4254 | ahc_outb(ahc, SCB_LUN, |
| 4255 | ahc_inb(ahc, SCB_LUN) ^ SCB_XFERLEN_ODD); |
| 4256 | } |
| 4257 | } |
| 4258 | } |
| 4259 | |
| 4260 | |
| 4261 | /* |
| 4262 | * Reinitialize the data pointers for the active transfer |
| 4263 | * based on its current residual. |
| 4264 | */ |
| 4265 | static void |
| 4266 | ahc_reinitialize_dataptrs(struct ahc_softc *ahc) |
| 4267 | { |
| 4268 | struct scb *scb; |
| 4269 | struct ahc_dma_seg *sg; |
| 4270 | u_int scb_index; |
| 4271 | uint32_t sgptr; |
| 4272 | uint32_t resid; |
| 4273 | uint32_t dataptr; |
| 4274 | |
| 4275 | scb_index = ahc_inb(ahc, SCB_TAG); |
| 4276 | scb = ahc_lookup_scb(ahc, scb_index); |
| 4277 | sgptr = (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 3) << 24) |
| 4278 | | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 2) << 16) |
| 4279 | | (ahc_inb(ahc, SCB_RESIDUAL_SGPTR + 1) << 8) |
| 4280 | | ahc_inb(ahc, SCB_RESIDUAL_SGPTR); |
| 4281 | |
| 4282 | sgptr &= SG_PTR_MASK; |
| 4283 | sg = ahc_sg_bus_to_virt(scb, sgptr); |
| 4284 | |
| 4285 | /* The residual sg_ptr always points to the next sg */ |
| 4286 | sg--; |
| 4287 | |
| 4288 | resid = (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 2) << 16) |
| 4289 | | (ahc_inb(ahc, SCB_RESIDUAL_DATACNT + 1) << 8) |
| 4290 | | ahc_inb(ahc, SCB_RESIDUAL_DATACNT); |
| 4291 | |
| 4292 | dataptr = ahc_le32toh(sg->addr) |
| 4293 | + (ahc_le32toh(sg->len) & AHC_SG_LEN_MASK) |
| 4294 | - resid; |
| 4295 | if ((ahc->flags & AHC_39BIT_ADDRESSING) != 0) { |
| 4296 | u_int dscommand1; |
| 4297 | |
| 4298 | dscommand1 = ahc_inb(ahc, DSCOMMAND1); |
| 4299 | ahc_outb(ahc, DSCOMMAND1, dscommand1 | HADDLDSEL0); |
| 4300 | ahc_outb(ahc, HADDR, |
| 4301 | (ahc_le32toh(sg->len) >> 24) & SG_HIGH_ADDR_BITS); |
| 4302 | ahc_outb(ahc, DSCOMMAND1, dscommand1); |
| 4303 | } |
| 4304 | ahc_outb(ahc, HADDR + 3, dataptr >> 24); |
| 4305 | ahc_outb(ahc, HADDR + 2, dataptr >> 16); |
| 4306 | ahc_outb(ahc, HADDR + 1, dataptr >> 8); |
| 4307 | ahc_outb(ahc, HADDR, dataptr); |
| 4308 | ahc_outb(ahc, HCNT + 2, resid >> 16); |
| 4309 | ahc_outb(ahc, HCNT + 1, resid >> 8); |
| 4310 | ahc_outb(ahc, HCNT, resid); |
| 4311 | if ((ahc->features & AHC_ULTRA2) == 0) { |
| 4312 | ahc_outb(ahc, STCNT + 2, resid >> 16); |
| 4313 | ahc_outb(ahc, STCNT + 1, resid >> 8); |
| 4314 | ahc_outb(ahc, STCNT, resid); |
| 4315 | } |
| 4316 | } |
| 4317 | |
| 4318 | /* |
| 4319 | * Handle the effects of issuing a bus device reset message. |
| 4320 | */ |
| 4321 | static void |
| 4322 | ahc_handle_devreset(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, |
| 4323 | cam_status status, char *message, int verbose_level) |
| 4324 | { |
| 4325 | #ifdef AHC_TARGET_MODE |
| 4326 | struct ahc_tmode_tstate* tstate; |
| 4327 | u_int lun; |
| 4328 | #endif |
| 4329 | int found; |
| 4330 | |
| 4331 | found = ahc_abort_scbs(ahc, devinfo->target, devinfo->channel, |
| 4332 | CAM_LUN_WILDCARD, SCB_LIST_NULL, devinfo->role, |
| 4333 | status); |
| 4334 | |
| 4335 | #ifdef AHC_TARGET_MODE |
| 4336 | /* |
| 4337 | * Send an immediate notify ccb to all target mord peripheral |
| 4338 | * drivers affected by this action. |
| 4339 | */ |
| 4340 | tstate = ahc->enabled_targets[devinfo->our_scsiid]; |
| 4341 | if (tstate != NULL) { |
| 4342 | for (lun = 0; lun < AHC_NUM_LUNS; lun++) { |
| 4343 | struct ahc_tmode_lstate* lstate; |
| 4344 | |
| 4345 | lstate = tstate->enabled_luns[lun]; |
| 4346 | if (lstate == NULL) |
| 4347 | continue; |
| 4348 | |
| 4349 | ahc_queue_lstate_event(ahc, lstate, devinfo->our_scsiid, |
| 4350 | MSG_BUS_DEV_RESET, /*arg*/0); |
| 4351 | ahc_send_lstate_events(ahc, lstate); |
| 4352 | } |
| 4353 | } |
| 4354 | #endif |
| 4355 | |
| 4356 | /* |
| 4357 | * Go back to async/narrow transfers and renegotiate. |
| 4358 | */ |
| 4359 | ahc_set_width(ahc, devinfo, MSG_EXT_WDTR_BUS_8_BIT, |
| 4360 | AHC_TRANS_CUR, /*paused*/TRUE); |
| 4361 | ahc_set_syncrate(ahc, devinfo, /*syncrate*/NULL, |
| 4362 | /*period*/0, /*offset*/0, /*ppr_options*/0, |
| 4363 | AHC_TRANS_CUR, /*paused*/TRUE); |
| 4364 | |
James Bottomley | 79778a2 | 2005-08-04 17:33:22 -0500 | [diff] [blame] | 4365 | if (status != CAM_SEL_TIMEOUT) |
| 4366 | ahc_send_async(ahc, devinfo->channel, devinfo->target, |
Hannes Reinecke | 9080063 | 2006-10-23 15:25:36 +0200 | [diff] [blame] | 4367 | CAM_LUN_WILDCARD, AC_SENT_BDR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4368 | |
| 4369 | if (message != NULL |
| 4370 | && (verbose_level <= bootverbose)) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4371 | printk("%s: %s on %c:%d. %d SCBs aborted\n", ahc_name(ahc), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4372 | message, devinfo->channel, devinfo->target, found); |
| 4373 | } |
| 4374 | |
| 4375 | #ifdef AHC_TARGET_MODE |
| 4376 | static void |
| 4377 | ahc_setup_target_msgin(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, |
| 4378 | struct scb *scb) |
| 4379 | { |
| 4380 | |
| 4381 | /* |
| 4382 | * To facilitate adding multiple messages together, |
| 4383 | * each routine should increment the index and len |
| 4384 | * variables instead of setting them explicitly. |
| 4385 | */ |
| 4386 | ahc->msgout_index = 0; |
| 4387 | ahc->msgout_len = 0; |
| 4388 | |
| 4389 | if (scb != NULL && (scb->flags & SCB_AUTO_NEGOTIATE) != 0) |
| 4390 | ahc_build_transfer_msg(ahc, devinfo); |
| 4391 | else |
| 4392 | panic("ahc_intr: AWAITING target message with no message"); |
| 4393 | |
| 4394 | ahc->msgout_index = 0; |
| 4395 | ahc->msg_type = MSG_TYPE_TARGET_MSGIN; |
| 4396 | } |
| 4397 | #endif |
| 4398 | /**************************** Initialization **********************************/ |
| 4399 | /* |
| 4400 | * Allocate a controller structure for a new device |
| 4401 | * and perform initial initializion. |
| 4402 | */ |
| 4403 | struct ahc_softc * |
| 4404 | ahc_alloc(void *platform_arg, char *name) |
| 4405 | { |
| 4406 | struct ahc_softc *ahc; |
| 4407 | int i; |
| 4408 | |
| 4409 | #ifndef __FreeBSD__ |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4410 | ahc = kmalloc(sizeof(*ahc), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4411 | if (!ahc) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4412 | printk("aic7xxx: cannot malloc softc!\n"); |
| 4413 | kfree(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4414 | return NULL; |
| 4415 | } |
| 4416 | #else |
| 4417 | ahc = device_get_softc((device_t)platform_arg); |
| 4418 | #endif |
| 4419 | memset(ahc, 0, sizeof(*ahc)); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4420 | ahc->seep_config = kmalloc(sizeof(*ahc->seep_config), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4421 | if (ahc->seep_config == NULL) { |
| 4422 | #ifndef __FreeBSD__ |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4423 | kfree(ahc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4424 | #endif |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4425 | kfree(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4426 | return (NULL); |
| 4427 | } |
| 4428 | LIST_INIT(&ahc->pending_scbs); |
| 4429 | /* We don't know our unit number until the OSM sets it */ |
| 4430 | ahc->name = name; |
| 4431 | ahc->unit = -1; |
| 4432 | ahc->description = NULL; |
| 4433 | ahc->channel = 'A'; |
| 4434 | ahc->channel_b = 'B'; |
| 4435 | ahc->chip = AHC_NONE; |
| 4436 | ahc->features = AHC_FENONE; |
| 4437 | ahc->bugs = AHC_BUGNONE; |
| 4438 | ahc->flags = AHC_FNONE; |
| 4439 | /* |
| 4440 | * Default to all error reporting enabled with the |
| 4441 | * sequencer operating at its fastest speed. |
| 4442 | * The bus attach code may modify this. |
| 4443 | */ |
| 4444 | ahc->seqctl = FASTMODE; |
| 4445 | |
| 4446 | for (i = 0; i < AHC_NUM_TARGETS; i++) |
| 4447 | TAILQ_INIT(&ahc->untagged_queues[i]); |
| 4448 | if (ahc_platform_alloc(ahc, platform_arg) != 0) { |
| 4449 | ahc_free(ahc); |
| 4450 | ahc = NULL; |
| 4451 | } |
| 4452 | return (ahc); |
| 4453 | } |
| 4454 | |
| 4455 | int |
| 4456 | ahc_softc_init(struct ahc_softc *ahc) |
| 4457 | { |
| 4458 | |
| 4459 | /* The IRQMS bit is only valid on VL and EISA chips */ |
| 4460 | if ((ahc->chip & AHC_PCI) == 0) |
| 4461 | ahc->unpause = ahc_inb(ahc, HCNTRL) & IRQMS; |
| 4462 | else |
| 4463 | ahc->unpause = 0; |
| 4464 | ahc->pause = ahc->unpause | PAUSE; |
| 4465 | /* XXX The shared scb data stuff should be deprecated */ |
| 4466 | if (ahc->scb_data == NULL) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4467 | ahc->scb_data = kmalloc(sizeof(*ahc->scb_data), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4468 | if (ahc->scb_data == NULL) |
| 4469 | return (ENOMEM); |
| 4470 | memset(ahc->scb_data, 0, sizeof(*ahc->scb_data)); |
| 4471 | } |
| 4472 | |
| 4473 | return (0); |
| 4474 | } |
| 4475 | |
| 4476 | void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4477 | ahc_set_unit(struct ahc_softc *ahc, int unit) |
| 4478 | { |
| 4479 | ahc->unit = unit; |
| 4480 | } |
| 4481 | |
| 4482 | void |
| 4483 | ahc_set_name(struct ahc_softc *ahc, char *name) |
| 4484 | { |
| 4485 | if (ahc->name != NULL) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4486 | kfree(ahc->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4487 | ahc->name = name; |
| 4488 | } |
| 4489 | |
| 4490 | void |
| 4491 | ahc_free(struct ahc_softc *ahc) |
| 4492 | { |
| 4493 | int i; |
| 4494 | |
| 4495 | switch (ahc->init_level) { |
| 4496 | default: |
| 4497 | case 5: |
| 4498 | ahc_shutdown(ahc); |
| 4499 | /* FALLTHROUGH */ |
| 4500 | case 4: |
| 4501 | ahc_dmamap_unload(ahc, ahc->shared_data_dmat, |
| 4502 | ahc->shared_data_dmamap); |
| 4503 | /* FALLTHROUGH */ |
| 4504 | case 3: |
| 4505 | ahc_dmamem_free(ahc, ahc->shared_data_dmat, ahc->qoutfifo, |
| 4506 | ahc->shared_data_dmamap); |
| 4507 | ahc_dmamap_destroy(ahc, ahc->shared_data_dmat, |
| 4508 | ahc->shared_data_dmamap); |
| 4509 | /* FALLTHROUGH */ |
| 4510 | case 2: |
| 4511 | ahc_dma_tag_destroy(ahc, ahc->shared_data_dmat); |
| 4512 | case 1: |
| 4513 | #ifndef __linux__ |
| 4514 | ahc_dma_tag_destroy(ahc, ahc->buffer_dmat); |
| 4515 | #endif |
| 4516 | break; |
| 4517 | case 0: |
| 4518 | break; |
| 4519 | } |
| 4520 | |
| 4521 | #ifndef __linux__ |
| 4522 | ahc_dma_tag_destroy(ahc, ahc->parent_dmat); |
| 4523 | #endif |
| 4524 | ahc_platform_free(ahc); |
| 4525 | ahc_fini_scbdata(ahc); |
| 4526 | for (i = 0; i < AHC_NUM_TARGETS; i++) { |
| 4527 | struct ahc_tmode_tstate *tstate; |
| 4528 | |
| 4529 | tstate = ahc->enabled_targets[i]; |
| 4530 | if (tstate != NULL) { |
| 4531 | #ifdef AHC_TARGET_MODE |
| 4532 | int j; |
| 4533 | |
| 4534 | for (j = 0; j < AHC_NUM_LUNS; j++) { |
| 4535 | struct ahc_tmode_lstate *lstate; |
| 4536 | |
| 4537 | lstate = tstate->enabled_luns[j]; |
| 4538 | if (lstate != NULL) { |
| 4539 | xpt_free_path(lstate->path); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4540 | kfree(lstate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4541 | } |
| 4542 | } |
| 4543 | #endif |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4544 | kfree(tstate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4545 | } |
| 4546 | } |
| 4547 | #ifdef AHC_TARGET_MODE |
| 4548 | if (ahc->black_hole != NULL) { |
| 4549 | xpt_free_path(ahc->black_hole->path); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4550 | kfree(ahc->black_hole); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4551 | } |
| 4552 | #endif |
| 4553 | if (ahc->name != NULL) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4554 | kfree(ahc->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4555 | if (ahc->seep_config != NULL) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4556 | kfree(ahc->seep_config); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4557 | #ifndef __FreeBSD__ |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4558 | kfree(ahc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4559 | #endif |
| 4560 | return; |
| 4561 | } |
| 4562 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 4563 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4564 | ahc_shutdown(void *arg) |
| 4565 | { |
| 4566 | struct ahc_softc *ahc; |
| 4567 | int i; |
| 4568 | |
| 4569 | ahc = (struct ahc_softc *)arg; |
| 4570 | |
| 4571 | /* This will reset most registers to 0, but not all */ |
| 4572 | ahc_reset(ahc, /*reinit*/FALSE); |
| 4573 | ahc_outb(ahc, SCSISEQ, 0); |
| 4574 | ahc_outb(ahc, SXFRCTL0, 0); |
| 4575 | ahc_outb(ahc, DSPCISTATUS, 0); |
| 4576 | |
| 4577 | for (i = TARG_SCSIRATE; i < SCSICONF; i++) |
| 4578 | ahc_outb(ahc, i, 0); |
| 4579 | } |
| 4580 | |
| 4581 | /* |
| 4582 | * Reset the controller and record some information about it |
| 4583 | * that is only available just after a reset. If "reinit" is |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 4584 | * non-zero, this reset occurred after initial configuration |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4585 | * and the caller requests that the chip be fully reinitialized |
| 4586 | * to a runable state. Chip interrupts are *not* enabled after |
| 4587 | * a reinitialization. The caller must enable interrupts via |
| 4588 | * ahc_intr_enable(). |
| 4589 | */ |
| 4590 | int |
| 4591 | ahc_reset(struct ahc_softc *ahc, int reinit) |
| 4592 | { |
| 4593 | u_int sblkctl; |
| 4594 | u_int sxfrctl1_a, sxfrctl1_b; |
| 4595 | int error; |
| 4596 | int wait; |
| 4597 | |
| 4598 | /* |
| 4599 | * Preserve the value of the SXFRCTL1 register for all channels. |
| 4600 | * It contains settings that affect termination and we don't want |
| 4601 | * to disturb the integrity of the bus. |
| 4602 | */ |
| 4603 | ahc_pause(ahc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4604 | sxfrctl1_b = 0; |
| 4605 | if ((ahc->chip & AHC_CHIPID_MASK) == AHC_AIC7770) { |
| 4606 | u_int sblkctl; |
| 4607 | |
| 4608 | /* |
| 4609 | * Save channel B's settings in case this chip |
| 4610 | * is setup for TWIN channel operation. |
| 4611 | */ |
| 4612 | sblkctl = ahc_inb(ahc, SBLKCTL); |
| 4613 | ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB); |
| 4614 | sxfrctl1_b = ahc_inb(ahc, SXFRCTL1); |
| 4615 | ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB); |
| 4616 | } |
| 4617 | sxfrctl1_a = ahc_inb(ahc, SXFRCTL1); |
| 4618 | |
| 4619 | ahc_outb(ahc, HCNTRL, CHIPRST | ahc->pause); |
| 4620 | |
| 4621 | /* |
| 4622 | * Ensure that the reset has finished. We delay 1000us |
| 4623 | * prior to reading the register to make sure the chip |
| 4624 | * has sufficiently completed its reset to handle register |
| 4625 | * accesses. |
| 4626 | */ |
| 4627 | wait = 1000; |
| 4628 | do { |
| 4629 | ahc_delay(1000); |
| 4630 | } while (--wait && !(ahc_inb(ahc, HCNTRL) & CHIPRSTACK)); |
| 4631 | |
| 4632 | if (wait == 0) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4633 | printk("%s: WARNING - Failed chip reset! " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4634 | "Trying to initialize anyway.\n", ahc_name(ahc)); |
| 4635 | } |
| 4636 | ahc_outb(ahc, HCNTRL, ahc->pause); |
| 4637 | |
| 4638 | /* Determine channel configuration */ |
| 4639 | sblkctl = ahc_inb(ahc, SBLKCTL) & (SELBUSB|SELWIDE); |
| 4640 | /* No Twin Channel PCI cards */ |
| 4641 | if ((ahc->chip & AHC_PCI) != 0) |
| 4642 | sblkctl &= ~SELBUSB; |
| 4643 | switch (sblkctl) { |
| 4644 | case 0: |
| 4645 | /* Single Narrow Channel */ |
| 4646 | break; |
| 4647 | case 2: |
| 4648 | /* Wide Channel */ |
| 4649 | ahc->features |= AHC_WIDE; |
| 4650 | break; |
| 4651 | case 8: |
| 4652 | /* Twin Channel */ |
| 4653 | ahc->features |= AHC_TWIN; |
| 4654 | break; |
| 4655 | default: |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4656 | printk(" Unsupported adapter type. Ignoring\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4657 | return(-1); |
| 4658 | } |
| 4659 | |
| 4660 | /* |
| 4661 | * Reload sxfrctl1. |
| 4662 | * |
| 4663 | * We must always initialize STPWEN to 1 before we |
| 4664 | * restore the saved values. STPWEN is initialized |
| 4665 | * to a tri-state condition which can only be cleared |
| 4666 | * by turning it on. |
| 4667 | */ |
| 4668 | if ((ahc->features & AHC_TWIN) != 0) { |
| 4669 | u_int sblkctl; |
| 4670 | |
| 4671 | sblkctl = ahc_inb(ahc, SBLKCTL); |
| 4672 | ahc_outb(ahc, SBLKCTL, sblkctl | SELBUSB); |
| 4673 | ahc_outb(ahc, SXFRCTL1, sxfrctl1_b); |
| 4674 | ahc_outb(ahc, SBLKCTL, sblkctl & ~SELBUSB); |
| 4675 | } |
| 4676 | ahc_outb(ahc, SXFRCTL1, sxfrctl1_a); |
| 4677 | |
| 4678 | error = 0; |
| 4679 | if (reinit != 0) |
| 4680 | /* |
| 4681 | * If a recovery action has forced a chip reset, |
| 4682 | * re-initialize the chip to our liking. |
| 4683 | */ |
| 4684 | error = ahc->bus_chip_init(ahc); |
| 4685 | #ifdef AHC_DUMP_SEQ |
| 4686 | else |
| 4687 | ahc_dumpseq(ahc); |
| 4688 | #endif |
| 4689 | |
| 4690 | return (error); |
| 4691 | } |
| 4692 | |
| 4693 | /* |
| 4694 | * Determine the number of SCBs available on the controller |
| 4695 | */ |
| 4696 | int |
| 4697 | ahc_probe_scbs(struct ahc_softc *ahc) { |
| 4698 | int i; |
| 4699 | |
| 4700 | for (i = 0; i < AHC_SCB_MAX; i++) { |
| 4701 | |
| 4702 | ahc_outb(ahc, SCBPTR, i); |
| 4703 | ahc_outb(ahc, SCB_BASE, i); |
| 4704 | if (ahc_inb(ahc, SCB_BASE) != i) |
| 4705 | break; |
| 4706 | ahc_outb(ahc, SCBPTR, 0); |
| 4707 | if (ahc_inb(ahc, SCB_BASE) != 0) |
| 4708 | break; |
| 4709 | } |
| 4710 | return (i); |
| 4711 | } |
| 4712 | |
| 4713 | static void |
| 4714 | ahc_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) |
| 4715 | { |
| 4716 | dma_addr_t *baddr; |
| 4717 | |
| 4718 | baddr = (dma_addr_t *)arg; |
| 4719 | *baddr = segs->ds_addr; |
| 4720 | } |
| 4721 | |
| 4722 | static void |
| 4723 | ahc_build_free_scb_list(struct ahc_softc *ahc) |
| 4724 | { |
| 4725 | int scbsize; |
| 4726 | int i; |
| 4727 | |
| 4728 | scbsize = 32; |
| 4729 | if ((ahc->flags & AHC_LSCBS_ENABLED) != 0) |
| 4730 | scbsize = 64; |
| 4731 | |
| 4732 | for (i = 0; i < ahc->scb_data->maxhscbs; i++) { |
| 4733 | int j; |
| 4734 | |
| 4735 | ahc_outb(ahc, SCBPTR, i); |
| 4736 | |
| 4737 | /* |
| 4738 | * Touch all SCB bytes to avoid parity errors |
| 4739 | * should one of our debugging routines read |
| 4740 | * an otherwise uninitiatlized byte. |
| 4741 | */ |
| 4742 | for (j = 0; j < scbsize; j++) |
| 4743 | ahc_outb(ahc, SCB_BASE+j, 0xFF); |
| 4744 | |
| 4745 | /* Clear the control byte. */ |
| 4746 | ahc_outb(ahc, SCB_CONTROL, 0); |
| 4747 | |
| 4748 | /* Set the next pointer */ |
| 4749 | if ((ahc->flags & AHC_PAGESCBS) != 0) |
| 4750 | ahc_outb(ahc, SCB_NEXT, i+1); |
| 4751 | else |
| 4752 | ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL); |
| 4753 | |
| 4754 | /* Make the tag number, SCSIID, and lun invalid */ |
| 4755 | ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL); |
| 4756 | ahc_outb(ahc, SCB_SCSIID, 0xFF); |
| 4757 | ahc_outb(ahc, SCB_LUN, 0xFF); |
| 4758 | } |
| 4759 | |
| 4760 | if ((ahc->flags & AHC_PAGESCBS) != 0) { |
| 4761 | /* SCB 0 heads the free list. */ |
| 4762 | ahc_outb(ahc, FREE_SCBH, 0); |
| 4763 | } else { |
| 4764 | /* No free list. */ |
| 4765 | ahc_outb(ahc, FREE_SCBH, SCB_LIST_NULL); |
| 4766 | } |
| 4767 | |
| 4768 | /* Make sure that the last SCB terminates the free list */ |
| 4769 | ahc_outb(ahc, SCBPTR, i-1); |
| 4770 | ahc_outb(ahc, SCB_NEXT, SCB_LIST_NULL); |
| 4771 | } |
| 4772 | |
| 4773 | static int |
| 4774 | ahc_init_scbdata(struct ahc_softc *ahc) |
| 4775 | { |
| 4776 | struct scb_data *scb_data; |
| 4777 | |
| 4778 | scb_data = ahc->scb_data; |
| 4779 | SLIST_INIT(&scb_data->free_scbs); |
| 4780 | SLIST_INIT(&scb_data->sg_maps); |
| 4781 | |
| 4782 | /* Allocate SCB resources */ |
Jesper Juhl | 2099973 | 2010-11-09 00:09:25 +0100 | [diff] [blame] | 4783 | scb_data->scbarray = kmalloc(sizeof(struct scb) * AHC_SCB_MAX_ALLOC, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4784 | if (scb_data->scbarray == NULL) |
| 4785 | return (ENOMEM); |
| 4786 | memset(scb_data->scbarray, 0, sizeof(struct scb) * AHC_SCB_MAX_ALLOC); |
| 4787 | |
| 4788 | /* Determine the number of hardware SCBs and initialize them */ |
| 4789 | |
| 4790 | scb_data->maxhscbs = ahc_probe_scbs(ahc); |
| 4791 | if (ahc->scb_data->maxhscbs == 0) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4792 | printk("%s: No SCB space found\n", ahc_name(ahc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4793 | return (ENXIO); |
| 4794 | } |
| 4795 | |
| 4796 | /* |
| 4797 | * Create our DMA tags. These tags define the kinds of device |
| 4798 | * accessible memory allocations and memory mappings we will |
| 4799 | * need to perform during normal operation. |
| 4800 | * |
| 4801 | * Unless we need to further restrict the allocation, we rely |
| 4802 | * on the restrictions of the parent dmat, hence the common |
| 4803 | * use of MAXADDR and MAXSIZE. |
| 4804 | */ |
| 4805 | |
| 4806 | /* DMA tag for our hardware scb structures */ |
| 4807 | if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1, |
| 4808 | /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, |
| 4809 | /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, |
| 4810 | /*highaddr*/BUS_SPACE_MAXADDR, |
| 4811 | /*filter*/NULL, /*filterarg*/NULL, |
| 4812 | AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb), |
| 4813 | /*nsegments*/1, |
| 4814 | /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, |
| 4815 | /*flags*/0, &scb_data->hscb_dmat) != 0) { |
| 4816 | goto error_exit; |
| 4817 | } |
| 4818 | |
| 4819 | scb_data->init_level++; |
| 4820 | |
| 4821 | /* Allocation for our hscbs */ |
| 4822 | if (ahc_dmamem_alloc(ahc, scb_data->hscb_dmat, |
| 4823 | (void **)&scb_data->hscbs, |
| 4824 | BUS_DMA_NOWAIT, &scb_data->hscb_dmamap) != 0) { |
| 4825 | goto error_exit; |
| 4826 | } |
| 4827 | |
| 4828 | scb_data->init_level++; |
| 4829 | |
| 4830 | /* And permanently map them */ |
| 4831 | ahc_dmamap_load(ahc, scb_data->hscb_dmat, scb_data->hscb_dmamap, |
| 4832 | scb_data->hscbs, |
| 4833 | AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb), |
| 4834 | ahc_dmamap_cb, &scb_data->hscb_busaddr, /*flags*/0); |
| 4835 | |
| 4836 | scb_data->init_level++; |
| 4837 | |
| 4838 | /* DMA tag for our sense buffers */ |
| 4839 | if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1, |
| 4840 | /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, |
| 4841 | /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, |
| 4842 | /*highaddr*/BUS_SPACE_MAXADDR, |
| 4843 | /*filter*/NULL, /*filterarg*/NULL, |
| 4844 | AHC_SCB_MAX_ALLOC * sizeof(struct scsi_sense_data), |
| 4845 | /*nsegments*/1, |
| 4846 | /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, |
| 4847 | /*flags*/0, &scb_data->sense_dmat) != 0) { |
| 4848 | goto error_exit; |
| 4849 | } |
| 4850 | |
| 4851 | scb_data->init_level++; |
| 4852 | |
| 4853 | /* Allocate them */ |
| 4854 | if (ahc_dmamem_alloc(ahc, scb_data->sense_dmat, |
| 4855 | (void **)&scb_data->sense, |
| 4856 | BUS_DMA_NOWAIT, &scb_data->sense_dmamap) != 0) { |
| 4857 | goto error_exit; |
| 4858 | } |
| 4859 | |
| 4860 | scb_data->init_level++; |
| 4861 | |
| 4862 | /* And permanently map them */ |
| 4863 | ahc_dmamap_load(ahc, scb_data->sense_dmat, scb_data->sense_dmamap, |
| 4864 | scb_data->sense, |
| 4865 | AHC_SCB_MAX_ALLOC * sizeof(struct scsi_sense_data), |
| 4866 | ahc_dmamap_cb, &scb_data->sense_busaddr, /*flags*/0); |
| 4867 | |
| 4868 | scb_data->init_level++; |
| 4869 | |
| 4870 | /* DMA tag for our S/G structures. We allocate in page sized chunks */ |
| 4871 | if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/8, |
| 4872 | /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, |
| 4873 | /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, |
| 4874 | /*highaddr*/BUS_SPACE_MAXADDR, |
| 4875 | /*filter*/NULL, /*filterarg*/NULL, |
| 4876 | PAGE_SIZE, /*nsegments*/1, |
| 4877 | /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, |
| 4878 | /*flags*/0, &scb_data->sg_dmat) != 0) { |
| 4879 | goto error_exit; |
| 4880 | } |
| 4881 | |
| 4882 | scb_data->init_level++; |
| 4883 | |
| 4884 | /* Perform initial CCB allocation */ |
| 4885 | memset(scb_data->hscbs, 0, |
| 4886 | AHC_SCB_MAX_ALLOC * sizeof(struct hardware_scb)); |
| 4887 | ahc_alloc_scbs(ahc); |
| 4888 | |
| 4889 | if (scb_data->numscbs == 0) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4890 | printk("%s: ahc_init_scbdata - " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4891 | "Unable to allocate initial scbs\n", |
| 4892 | ahc_name(ahc)); |
| 4893 | goto error_exit; |
| 4894 | } |
| 4895 | |
| 4896 | /* |
| 4897 | * Reserve the next queued SCB. |
| 4898 | */ |
| 4899 | ahc->next_queued_scb = ahc_get_scb(ahc); |
| 4900 | |
| 4901 | /* |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 4902 | * Note that we were successful |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4903 | */ |
| 4904 | return (0); |
| 4905 | |
| 4906 | error_exit: |
| 4907 | |
| 4908 | return (ENOMEM); |
| 4909 | } |
| 4910 | |
| 4911 | static void |
| 4912 | ahc_fini_scbdata(struct ahc_softc *ahc) |
| 4913 | { |
| 4914 | struct scb_data *scb_data; |
| 4915 | |
| 4916 | scb_data = ahc->scb_data; |
| 4917 | if (scb_data == NULL) |
| 4918 | return; |
| 4919 | |
| 4920 | switch (scb_data->init_level) { |
| 4921 | default: |
| 4922 | case 7: |
| 4923 | { |
| 4924 | struct sg_map_node *sg_map; |
| 4925 | |
| 4926 | while ((sg_map = SLIST_FIRST(&scb_data->sg_maps))!= NULL) { |
| 4927 | SLIST_REMOVE_HEAD(&scb_data->sg_maps, links); |
| 4928 | ahc_dmamap_unload(ahc, scb_data->sg_dmat, |
| 4929 | sg_map->sg_dmamap); |
| 4930 | ahc_dmamem_free(ahc, scb_data->sg_dmat, |
| 4931 | sg_map->sg_vaddr, |
| 4932 | sg_map->sg_dmamap); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4933 | kfree(sg_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4934 | } |
| 4935 | ahc_dma_tag_destroy(ahc, scb_data->sg_dmat); |
| 4936 | } |
| 4937 | case 6: |
| 4938 | ahc_dmamap_unload(ahc, scb_data->sense_dmat, |
| 4939 | scb_data->sense_dmamap); |
| 4940 | case 5: |
| 4941 | ahc_dmamem_free(ahc, scb_data->sense_dmat, scb_data->sense, |
| 4942 | scb_data->sense_dmamap); |
| 4943 | ahc_dmamap_destroy(ahc, scb_data->sense_dmat, |
| 4944 | scb_data->sense_dmamap); |
| 4945 | case 4: |
| 4946 | ahc_dma_tag_destroy(ahc, scb_data->sense_dmat); |
| 4947 | case 3: |
| 4948 | ahc_dmamap_unload(ahc, scb_data->hscb_dmat, |
| 4949 | scb_data->hscb_dmamap); |
| 4950 | case 2: |
| 4951 | ahc_dmamem_free(ahc, scb_data->hscb_dmat, scb_data->hscbs, |
| 4952 | scb_data->hscb_dmamap); |
| 4953 | ahc_dmamap_destroy(ahc, scb_data->hscb_dmat, |
| 4954 | scb_data->hscb_dmamap); |
| 4955 | case 1: |
| 4956 | ahc_dma_tag_destroy(ahc, scb_data->hscb_dmat); |
| 4957 | break; |
| 4958 | case 0: |
| 4959 | break; |
| 4960 | } |
| 4961 | if (scb_data->scbarray != NULL) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4962 | kfree(scb_data->scbarray); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4963 | } |
| 4964 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 4965 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4966 | ahc_alloc_scbs(struct ahc_softc *ahc) |
| 4967 | { |
| 4968 | struct scb_data *scb_data; |
| 4969 | struct scb *next_scb; |
| 4970 | struct sg_map_node *sg_map; |
| 4971 | dma_addr_t physaddr; |
| 4972 | struct ahc_dma_seg *segs; |
| 4973 | int newcount; |
| 4974 | int i; |
| 4975 | |
| 4976 | scb_data = ahc->scb_data; |
| 4977 | if (scb_data->numscbs >= AHC_SCB_MAX_ALLOC) |
| 4978 | /* Can't allocate any more */ |
| 4979 | return; |
| 4980 | |
| 4981 | next_scb = &scb_data->scbarray[scb_data->numscbs]; |
| 4982 | |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4983 | sg_map = kmalloc(sizeof(*sg_map), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4984 | |
| 4985 | if (sg_map == NULL) |
| 4986 | return; |
| 4987 | |
| 4988 | /* Allocate S/G space for the next batch of SCBS */ |
| 4989 | if (ahc_dmamem_alloc(ahc, scb_data->sg_dmat, |
| 4990 | (void **)&sg_map->sg_vaddr, |
| 4991 | BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 4992 | kfree(sg_map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4993 | return; |
| 4994 | } |
| 4995 | |
| 4996 | SLIST_INSERT_HEAD(&scb_data->sg_maps, sg_map, links); |
| 4997 | |
| 4998 | ahc_dmamap_load(ahc, scb_data->sg_dmat, sg_map->sg_dmamap, |
| 4999 | sg_map->sg_vaddr, PAGE_SIZE, ahc_dmamap_cb, |
| 5000 | &sg_map->sg_physaddr, /*flags*/0); |
| 5001 | |
| 5002 | segs = sg_map->sg_vaddr; |
| 5003 | physaddr = sg_map->sg_physaddr; |
| 5004 | |
| 5005 | newcount = (PAGE_SIZE / (AHC_NSEG * sizeof(struct ahc_dma_seg))); |
Amol Lad | 6d07cb7 | 2006-10-20 14:48:40 -0700 | [diff] [blame] | 5006 | newcount = min(newcount, (AHC_SCB_MAX_ALLOC - scb_data->numscbs)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5007 | for (i = 0; i < newcount; i++) { |
| 5008 | struct scb_platform_data *pdata; |
| 5009 | #ifndef __linux__ |
| 5010 | int error; |
| 5011 | #endif |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5012 | pdata = kmalloc(sizeof(*pdata), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5013 | if (pdata == NULL) |
| 5014 | break; |
| 5015 | next_scb->platform_data = pdata; |
| 5016 | next_scb->sg_map = sg_map; |
| 5017 | next_scb->sg_list = segs; |
| 5018 | /* |
| 5019 | * The sequencer always starts with the second entry. |
| 5020 | * The first entry is embedded in the scb. |
| 5021 | */ |
| 5022 | next_scb->sg_list_phys = physaddr + sizeof(struct ahc_dma_seg); |
| 5023 | next_scb->ahc_softc = ahc; |
| 5024 | next_scb->flags = SCB_FREE; |
| 5025 | #ifndef __linux__ |
| 5026 | error = ahc_dmamap_create(ahc, ahc->buffer_dmat, /*flags*/0, |
| 5027 | &next_scb->dmamap); |
| 5028 | if (error != 0) |
| 5029 | break; |
| 5030 | #endif |
| 5031 | next_scb->hscb = &scb_data->hscbs[scb_data->numscbs]; |
| 5032 | next_scb->hscb->tag = ahc->scb_data->numscbs; |
| 5033 | SLIST_INSERT_HEAD(&ahc->scb_data->free_scbs, |
| 5034 | next_scb, links.sle); |
| 5035 | segs += AHC_NSEG; |
| 5036 | physaddr += (AHC_NSEG * sizeof(struct ahc_dma_seg)); |
| 5037 | next_scb++; |
| 5038 | ahc->scb_data->numscbs++; |
| 5039 | } |
| 5040 | } |
| 5041 | |
| 5042 | void |
| 5043 | ahc_controller_info(struct ahc_softc *ahc, char *buf) |
| 5044 | { |
| 5045 | int len; |
| 5046 | |
| 5047 | len = sprintf(buf, "%s: ", ahc_chip_names[ahc->chip & AHC_CHIPID_MASK]); |
| 5048 | buf += len; |
| 5049 | if ((ahc->features & AHC_TWIN) != 0) |
| 5050 | len = sprintf(buf, "Twin Channel, A SCSI Id=%d, " |
| 5051 | "B SCSI Id=%d, primary %c, ", |
| 5052 | ahc->our_id, ahc->our_id_b, |
| 5053 | (ahc->flags & AHC_PRIMARY_CHANNEL) + 'A'); |
| 5054 | else { |
| 5055 | const char *speed; |
| 5056 | const char *type; |
| 5057 | |
| 5058 | speed = ""; |
| 5059 | if ((ahc->features & AHC_ULTRA) != 0) { |
| 5060 | speed = "Ultra "; |
| 5061 | } else if ((ahc->features & AHC_DT) != 0) { |
| 5062 | speed = "Ultra160 "; |
| 5063 | } else if ((ahc->features & AHC_ULTRA2) != 0) { |
| 5064 | speed = "Ultra2 "; |
| 5065 | } |
| 5066 | if ((ahc->features & AHC_WIDE) != 0) { |
| 5067 | type = "Wide"; |
| 5068 | } else { |
| 5069 | type = "Single"; |
| 5070 | } |
| 5071 | len = sprintf(buf, "%s%s Channel %c, SCSI Id=%d, ", |
| 5072 | speed, type, ahc->channel, ahc->our_id); |
| 5073 | } |
| 5074 | buf += len; |
| 5075 | |
| 5076 | if ((ahc->flags & AHC_PAGESCBS) != 0) |
| 5077 | sprintf(buf, "%d/%d SCBs", |
| 5078 | ahc->scb_data->maxhscbs, AHC_MAX_QUEUE); |
| 5079 | else |
| 5080 | sprintf(buf, "%d SCBs", ahc->scb_data->maxhscbs); |
| 5081 | } |
| 5082 | |
| 5083 | int |
| 5084 | ahc_chip_init(struct ahc_softc *ahc) |
| 5085 | { |
| 5086 | int term; |
| 5087 | int error; |
| 5088 | u_int i; |
| 5089 | u_int scsi_conf; |
| 5090 | u_int scsiseq_template; |
| 5091 | uint32_t physaddr; |
| 5092 | |
| 5093 | ahc_outb(ahc, SEQ_FLAGS, 0); |
| 5094 | ahc_outb(ahc, SEQ_FLAGS2, 0); |
| 5095 | |
| 5096 | /* Set the SCSI Id, SXFRCTL0, SXFRCTL1, and SIMODE1, for both channels*/ |
| 5097 | if (ahc->features & AHC_TWIN) { |
| 5098 | |
| 5099 | /* |
| 5100 | * Setup Channel B first. |
| 5101 | */ |
| 5102 | ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) | SELBUSB); |
| 5103 | term = (ahc->flags & AHC_TERM_ENB_B) != 0 ? STPWEN : 0; |
| 5104 | ahc_outb(ahc, SCSIID, ahc->our_id_b); |
| 5105 | scsi_conf = ahc_inb(ahc, SCSICONF + 1); |
| 5106 | ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL)) |
| 5107 | |term|ahc->seltime_b|ENSTIMER|ACTNEGEN); |
| 5108 | if ((ahc->features & AHC_ULTRA2) != 0) |
| 5109 | ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR); |
| 5110 | ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR); |
| 5111 | ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN); |
| 5112 | |
| 5113 | /* Select Channel A */ |
| 5114 | ahc_outb(ahc, SBLKCTL, ahc_inb(ahc, SBLKCTL) & ~SELBUSB); |
| 5115 | } |
| 5116 | term = (ahc->flags & AHC_TERM_ENB_A) != 0 ? STPWEN : 0; |
| 5117 | if ((ahc->features & AHC_ULTRA2) != 0) |
| 5118 | ahc_outb(ahc, SCSIID_ULTRA2, ahc->our_id); |
| 5119 | else |
| 5120 | ahc_outb(ahc, SCSIID, ahc->our_id); |
| 5121 | scsi_conf = ahc_inb(ahc, SCSICONF); |
| 5122 | ahc_outb(ahc, SXFRCTL1, (scsi_conf & (ENSPCHK|STIMESEL)) |
| 5123 | |term|ahc->seltime |
| 5124 | |ENSTIMER|ACTNEGEN); |
| 5125 | if ((ahc->features & AHC_ULTRA2) != 0) |
| 5126 | ahc_outb(ahc, SIMODE0, ahc_inb(ahc, SIMODE0)|ENIOERR); |
| 5127 | ahc_outb(ahc, SIMODE1, ENSELTIMO|ENSCSIRST|ENSCSIPERR); |
| 5128 | ahc_outb(ahc, SXFRCTL0, DFON|SPIOEN); |
| 5129 | |
| 5130 | /* There are no untagged SCBs active yet. */ |
| 5131 | for (i = 0; i < 16; i++) { |
| 5132 | ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, 0)); |
| 5133 | if ((ahc->flags & AHC_SCB_BTT) != 0) { |
| 5134 | int lun; |
| 5135 | |
| 5136 | /* |
| 5137 | * The SCB based BTT allows an entry per |
| 5138 | * target and lun pair. |
| 5139 | */ |
| 5140 | for (lun = 1; lun < AHC_NUM_LUNS; lun++) |
| 5141 | ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, lun)); |
| 5142 | } |
| 5143 | } |
| 5144 | |
| 5145 | /* All of our queues are empty */ |
| 5146 | for (i = 0; i < 256; i++) |
| 5147 | ahc->qoutfifo[i] = SCB_LIST_NULL; |
| 5148 | ahc_sync_qoutfifo(ahc, BUS_DMASYNC_PREREAD); |
| 5149 | |
| 5150 | for (i = 0; i < 256; i++) |
| 5151 | ahc->qinfifo[i] = SCB_LIST_NULL; |
| 5152 | |
| 5153 | if ((ahc->features & AHC_MULTI_TID) != 0) { |
| 5154 | ahc_outb(ahc, TARGID, 0); |
| 5155 | ahc_outb(ahc, TARGID + 1, 0); |
| 5156 | } |
| 5157 | |
| 5158 | /* |
| 5159 | * Tell the sequencer where it can find our arrays in memory. |
| 5160 | */ |
| 5161 | physaddr = ahc->scb_data->hscb_busaddr; |
| 5162 | ahc_outb(ahc, HSCB_ADDR, physaddr & 0xFF); |
| 5163 | ahc_outb(ahc, HSCB_ADDR + 1, (physaddr >> 8) & 0xFF); |
| 5164 | ahc_outb(ahc, HSCB_ADDR + 2, (physaddr >> 16) & 0xFF); |
| 5165 | ahc_outb(ahc, HSCB_ADDR + 3, (physaddr >> 24) & 0xFF); |
| 5166 | |
| 5167 | physaddr = ahc->shared_data_busaddr; |
| 5168 | ahc_outb(ahc, SHARED_DATA_ADDR, physaddr & 0xFF); |
| 5169 | ahc_outb(ahc, SHARED_DATA_ADDR + 1, (physaddr >> 8) & 0xFF); |
| 5170 | ahc_outb(ahc, SHARED_DATA_ADDR + 2, (physaddr >> 16) & 0xFF); |
| 5171 | ahc_outb(ahc, SHARED_DATA_ADDR + 3, (physaddr >> 24) & 0xFF); |
| 5172 | |
| 5173 | /* |
| 5174 | * Initialize the group code to command length table. |
| 5175 | * This overrides the values in TARG_SCSIRATE, so only |
| 5176 | * setup the table after we have processed that information. |
| 5177 | */ |
| 5178 | ahc_outb(ahc, CMDSIZE_TABLE, 5); |
| 5179 | ahc_outb(ahc, CMDSIZE_TABLE + 1, 9); |
| 5180 | ahc_outb(ahc, CMDSIZE_TABLE + 2, 9); |
| 5181 | ahc_outb(ahc, CMDSIZE_TABLE + 3, 0); |
| 5182 | ahc_outb(ahc, CMDSIZE_TABLE + 4, 15); |
| 5183 | ahc_outb(ahc, CMDSIZE_TABLE + 5, 11); |
| 5184 | ahc_outb(ahc, CMDSIZE_TABLE + 6, 0); |
| 5185 | ahc_outb(ahc, CMDSIZE_TABLE + 7, 0); |
| 5186 | |
| 5187 | if ((ahc->features & AHC_HS_MAILBOX) != 0) |
| 5188 | ahc_outb(ahc, HS_MAILBOX, 0); |
| 5189 | |
| 5190 | /* Tell the sequencer of our initial queue positions */ |
| 5191 | if ((ahc->features & AHC_TARGETMODE) != 0) { |
| 5192 | ahc->tqinfifonext = 1; |
| 5193 | ahc_outb(ahc, KERNEL_TQINPOS, ahc->tqinfifonext - 1); |
| 5194 | ahc_outb(ahc, TQINPOS, ahc->tqinfifonext); |
| 5195 | } |
| 5196 | ahc->qinfifonext = 0; |
| 5197 | ahc->qoutfifonext = 0; |
| 5198 | if ((ahc->features & AHC_QUEUE_REGS) != 0) { |
| 5199 | ahc_outb(ahc, QOFF_CTLSTA, SCB_QSIZE_256); |
| 5200 | ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); |
| 5201 | ahc_outb(ahc, SNSCB_QOFF, ahc->qinfifonext); |
| 5202 | ahc_outb(ahc, SDSCB_QOFF, 0); |
| 5203 | } else { |
| 5204 | ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); |
| 5205 | ahc_outb(ahc, QINPOS, ahc->qinfifonext); |
| 5206 | ahc_outb(ahc, QOUTPOS, ahc->qoutfifonext); |
| 5207 | } |
| 5208 | |
| 5209 | /* We don't have any waiting selections */ |
| 5210 | ahc_outb(ahc, WAITING_SCBH, SCB_LIST_NULL); |
| 5211 | |
| 5212 | /* Our disconnection list is empty too */ |
| 5213 | ahc_outb(ahc, DISCONNECTED_SCBH, SCB_LIST_NULL); |
| 5214 | |
| 5215 | /* Message out buffer starts empty */ |
| 5216 | ahc_outb(ahc, MSG_OUT, MSG_NOOP); |
| 5217 | |
| 5218 | /* |
| 5219 | * Setup the allowed SCSI Sequences based on operational mode. |
Uwe Kleine-Koenig | 24ed7a9 | 2009-09-21 10:39:22 +0200 | [diff] [blame] | 5220 | * If we are a target, we'll enable select in operations once |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5221 | * we've had a lun enabled. |
| 5222 | */ |
| 5223 | scsiseq_template = ENSELO|ENAUTOATNO|ENAUTOATNP; |
| 5224 | if ((ahc->flags & AHC_INITIATORROLE) != 0) |
| 5225 | scsiseq_template |= ENRSELI; |
| 5226 | ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq_template); |
| 5227 | |
| 5228 | /* Initialize our list of free SCBs. */ |
| 5229 | ahc_build_free_scb_list(ahc); |
| 5230 | |
| 5231 | /* |
| 5232 | * Tell the sequencer which SCB will be the next one it receives. |
| 5233 | */ |
| 5234 | ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag); |
| 5235 | |
| 5236 | /* |
| 5237 | * Load the Sequencer program and Enable the adapter |
| 5238 | * in "fast" mode. |
| 5239 | */ |
| 5240 | if (bootverbose) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5241 | printk("%s: Downloading Sequencer Program...", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5242 | ahc_name(ahc)); |
| 5243 | |
| 5244 | error = ahc_loadseq(ahc); |
| 5245 | if (error != 0) |
| 5246 | return (error); |
| 5247 | |
| 5248 | if ((ahc->features & AHC_ULTRA2) != 0) { |
| 5249 | int wait; |
| 5250 | |
| 5251 | /* |
| 5252 | * Wait for up to 500ms for our transceivers |
| 5253 | * to settle. If the adapter does not have |
| 5254 | * a cable attached, the transceivers may |
| 5255 | * never settle, so don't complain if we |
| 5256 | * fail here. |
| 5257 | */ |
| 5258 | for (wait = 5000; |
| 5259 | (ahc_inb(ahc, SBLKCTL) & (ENAB40|ENAB20)) == 0 && wait; |
| 5260 | wait--) |
| 5261 | ahc_delay(100); |
| 5262 | } |
| 5263 | ahc_restart(ahc); |
| 5264 | return (0); |
| 5265 | } |
| 5266 | |
| 5267 | /* |
| 5268 | * Start the board, ready for normal operation |
| 5269 | */ |
| 5270 | int |
| 5271 | ahc_init(struct ahc_softc *ahc) |
| 5272 | { |
| 5273 | int max_targ; |
| 5274 | u_int i; |
| 5275 | u_int scsi_conf; |
| 5276 | u_int ultraenb; |
| 5277 | u_int discenable; |
| 5278 | u_int tagenable; |
| 5279 | size_t driver_data_size; |
| 5280 | |
| 5281 | #ifdef AHC_DEBUG |
| 5282 | if ((ahc_debug & AHC_DEBUG_SEQUENCER) != 0) |
| 5283 | ahc->flags |= AHC_SEQUENCER_DEBUG; |
| 5284 | #endif |
| 5285 | |
| 5286 | #ifdef AHC_PRINT_SRAM |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5287 | printk("Scratch Ram:"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5288 | for (i = 0x20; i < 0x5f; i++) { |
| 5289 | if (((i % 8) == 0) && (i != 0)) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5290 | printk ("\n "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5291 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5292 | printk (" 0x%x", ahc_inb(ahc, i)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5293 | } |
| 5294 | if ((ahc->features & AHC_MORE_SRAM) != 0) { |
| 5295 | for (i = 0x70; i < 0x7f; i++) { |
| 5296 | if (((i % 8) == 0) && (i != 0)) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5297 | printk ("\n "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5298 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5299 | printk (" 0x%x", ahc_inb(ahc, i)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5300 | } |
| 5301 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5302 | printk ("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5303 | /* |
| 5304 | * Reading uninitialized scratch ram may |
| 5305 | * generate parity errors. |
| 5306 | */ |
| 5307 | ahc_outb(ahc, CLRINT, CLRPARERR); |
| 5308 | ahc_outb(ahc, CLRINT, CLRBRKADRINT); |
| 5309 | #endif |
| 5310 | max_targ = 15; |
| 5311 | |
| 5312 | /* |
| 5313 | * Assume we have a board at this stage and it has been reset. |
| 5314 | */ |
| 5315 | if ((ahc->flags & AHC_USEDEFAULTS) != 0) |
| 5316 | ahc->our_id = ahc->our_id_b = 7; |
| 5317 | |
| 5318 | /* |
| 5319 | * Default to allowing initiator operations. |
| 5320 | */ |
| 5321 | ahc->flags |= AHC_INITIATORROLE; |
| 5322 | |
| 5323 | /* |
| 5324 | * Only allow target mode features if this unit has them enabled. |
| 5325 | */ |
| 5326 | if ((AHC_TMODE_ENABLE & (0x1 << ahc->unit)) == 0) |
| 5327 | ahc->features &= ~AHC_TARGETMODE; |
| 5328 | |
| 5329 | #ifndef __linux__ |
| 5330 | /* DMA tag for mapping buffers into device visible space. */ |
| 5331 | if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1, |
| 5332 | /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, |
| 5333 | /*lowaddr*/ahc->flags & AHC_39BIT_ADDRESSING |
| 5334 | ? (dma_addr_t)0x7FFFFFFFFFULL |
| 5335 | : BUS_SPACE_MAXADDR_32BIT, |
| 5336 | /*highaddr*/BUS_SPACE_MAXADDR, |
| 5337 | /*filter*/NULL, /*filterarg*/NULL, |
| 5338 | /*maxsize*/(AHC_NSEG - 1) * PAGE_SIZE, |
| 5339 | /*nsegments*/AHC_NSEG, |
| 5340 | /*maxsegsz*/AHC_MAXTRANSFER_SIZE, |
| 5341 | /*flags*/BUS_DMA_ALLOCNOW, |
| 5342 | &ahc->buffer_dmat) != 0) { |
| 5343 | return (ENOMEM); |
| 5344 | } |
| 5345 | #endif |
| 5346 | |
| 5347 | ahc->init_level++; |
| 5348 | |
| 5349 | /* |
| 5350 | * DMA tag for our command fifos and other data in system memory |
| 5351 | * the card's sequencer must be able to access. For initiator |
| 5352 | * roles, we need to allocate space for the qinfifo and qoutfifo. |
| 5353 | * The qinfifo and qoutfifo are composed of 256 1 byte elements. |
| 5354 | * When providing for the target mode role, we must additionally |
| 5355 | * provide space for the incoming target command fifo and an extra |
| 5356 | * byte to deal with a dma bug in some chip versions. |
| 5357 | */ |
| 5358 | driver_data_size = 2 * 256 * sizeof(uint8_t); |
| 5359 | if ((ahc->features & AHC_TARGETMODE) != 0) |
| 5360 | driver_data_size += AHC_TMODE_CMDS * sizeof(struct target_cmd) |
| 5361 | + /*DMA WideOdd Bug Buffer*/1; |
| 5362 | if (ahc_dma_tag_create(ahc, ahc->parent_dmat, /*alignment*/1, |
| 5363 | /*boundary*/BUS_SPACE_MAXADDR_32BIT + 1, |
| 5364 | /*lowaddr*/BUS_SPACE_MAXADDR_32BIT, |
| 5365 | /*highaddr*/BUS_SPACE_MAXADDR, |
| 5366 | /*filter*/NULL, /*filterarg*/NULL, |
| 5367 | driver_data_size, |
| 5368 | /*nsegments*/1, |
| 5369 | /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, |
| 5370 | /*flags*/0, &ahc->shared_data_dmat) != 0) { |
| 5371 | return (ENOMEM); |
| 5372 | } |
| 5373 | |
| 5374 | ahc->init_level++; |
| 5375 | |
| 5376 | /* Allocation of driver data */ |
| 5377 | if (ahc_dmamem_alloc(ahc, ahc->shared_data_dmat, |
| 5378 | (void **)&ahc->qoutfifo, |
| 5379 | BUS_DMA_NOWAIT, &ahc->shared_data_dmamap) != 0) { |
| 5380 | return (ENOMEM); |
| 5381 | } |
| 5382 | |
| 5383 | ahc->init_level++; |
| 5384 | |
| 5385 | /* And permanently map it in */ |
| 5386 | ahc_dmamap_load(ahc, ahc->shared_data_dmat, ahc->shared_data_dmamap, |
| 5387 | ahc->qoutfifo, driver_data_size, ahc_dmamap_cb, |
| 5388 | &ahc->shared_data_busaddr, /*flags*/0); |
| 5389 | |
| 5390 | if ((ahc->features & AHC_TARGETMODE) != 0) { |
| 5391 | ahc->targetcmds = (struct target_cmd *)ahc->qoutfifo; |
| 5392 | ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[AHC_TMODE_CMDS]; |
| 5393 | ahc->dma_bug_buf = ahc->shared_data_busaddr |
| 5394 | + driver_data_size - 1; |
| 5395 | /* All target command blocks start out invalid. */ |
| 5396 | for (i = 0; i < AHC_TMODE_CMDS; i++) |
| 5397 | ahc->targetcmds[i].cmd_valid = 0; |
| 5398 | ahc_sync_tqinfifo(ahc, BUS_DMASYNC_PREREAD); |
| 5399 | ahc->qoutfifo = (uint8_t *)&ahc->targetcmds[256]; |
| 5400 | } |
| 5401 | ahc->qinfifo = &ahc->qoutfifo[256]; |
| 5402 | |
| 5403 | ahc->init_level++; |
| 5404 | |
| 5405 | /* Allocate SCB data now that buffer_dmat is initialized */ |
| 5406 | if (ahc->scb_data->maxhscbs == 0) |
| 5407 | if (ahc_init_scbdata(ahc) != 0) |
| 5408 | return (ENOMEM); |
| 5409 | |
| 5410 | /* |
| 5411 | * Allocate a tstate to house information for our |
| 5412 | * initiator presence on the bus as well as the user |
| 5413 | * data for any target mode initiator. |
| 5414 | */ |
| 5415 | if (ahc_alloc_tstate(ahc, ahc->our_id, 'A') == NULL) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5416 | printk("%s: unable to allocate ahc_tmode_tstate. " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5417 | "Failing attach\n", ahc_name(ahc)); |
| 5418 | return (ENOMEM); |
| 5419 | } |
| 5420 | |
| 5421 | if ((ahc->features & AHC_TWIN) != 0) { |
| 5422 | if (ahc_alloc_tstate(ahc, ahc->our_id_b, 'B') == NULL) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5423 | printk("%s: unable to allocate ahc_tmode_tstate. " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5424 | "Failing attach\n", ahc_name(ahc)); |
| 5425 | return (ENOMEM); |
| 5426 | } |
| 5427 | } |
| 5428 | |
| 5429 | if (ahc->scb_data->maxhscbs < AHC_SCB_MAX_ALLOC) { |
| 5430 | ahc->flags |= AHC_PAGESCBS; |
| 5431 | } else { |
| 5432 | ahc->flags &= ~AHC_PAGESCBS; |
| 5433 | } |
| 5434 | |
| 5435 | #ifdef AHC_DEBUG |
| 5436 | if (ahc_debug & AHC_SHOW_MISC) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5437 | printk("%s: hardware scb %u bytes; kernel scb %u bytes; " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5438 | "ahc_dma %u bytes\n", |
| 5439 | ahc_name(ahc), |
| 5440 | (u_int)sizeof(struct hardware_scb), |
| 5441 | (u_int)sizeof(struct scb), |
| 5442 | (u_int)sizeof(struct ahc_dma_seg)); |
| 5443 | } |
| 5444 | #endif /* AHC_DEBUG */ |
| 5445 | |
| 5446 | /* |
| 5447 | * Look at the information that board initialization or |
| 5448 | * the board bios has left us. |
| 5449 | */ |
| 5450 | if (ahc->features & AHC_TWIN) { |
| 5451 | scsi_conf = ahc_inb(ahc, SCSICONF + 1); |
| 5452 | if ((scsi_conf & RESET_SCSI) != 0 |
| 5453 | && (ahc->flags & AHC_INITIATORROLE) != 0) |
| 5454 | ahc->flags |= AHC_RESET_BUS_B; |
| 5455 | } |
| 5456 | |
| 5457 | scsi_conf = ahc_inb(ahc, SCSICONF); |
| 5458 | if ((scsi_conf & RESET_SCSI) != 0 |
| 5459 | && (ahc->flags & AHC_INITIATORROLE) != 0) |
| 5460 | ahc->flags |= AHC_RESET_BUS_A; |
| 5461 | |
| 5462 | ultraenb = 0; |
| 5463 | tagenable = ALL_TARGETS_MASK; |
| 5464 | |
| 5465 | /* Grab the disconnection disable table and invert it for our needs */ |
| 5466 | if ((ahc->flags & AHC_USEDEFAULTS) != 0) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5467 | printk("%s: Host Adapter Bios disabled. Using default SCSI " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5468 | "device parameters\n", ahc_name(ahc)); |
| 5469 | ahc->flags |= AHC_EXTENDED_TRANS_A|AHC_EXTENDED_TRANS_B| |
| 5470 | AHC_TERM_ENB_A|AHC_TERM_ENB_B; |
| 5471 | discenable = ALL_TARGETS_MASK; |
| 5472 | if ((ahc->features & AHC_ULTRA) != 0) |
| 5473 | ultraenb = ALL_TARGETS_MASK; |
| 5474 | } else { |
| 5475 | discenable = ~((ahc_inb(ahc, DISC_DSB + 1) << 8) |
| 5476 | | ahc_inb(ahc, DISC_DSB)); |
| 5477 | if ((ahc->features & (AHC_ULTRA|AHC_ULTRA2)) != 0) |
| 5478 | ultraenb = (ahc_inb(ahc, ULTRA_ENB + 1) << 8) |
| 5479 | | ahc_inb(ahc, ULTRA_ENB); |
| 5480 | } |
| 5481 | |
| 5482 | if ((ahc->features & (AHC_WIDE|AHC_TWIN)) == 0) |
| 5483 | max_targ = 7; |
| 5484 | |
| 5485 | for (i = 0; i <= max_targ; i++) { |
| 5486 | struct ahc_initiator_tinfo *tinfo; |
| 5487 | struct ahc_tmode_tstate *tstate; |
| 5488 | u_int our_id; |
| 5489 | u_int target_id; |
| 5490 | char channel; |
| 5491 | |
| 5492 | channel = 'A'; |
| 5493 | our_id = ahc->our_id; |
| 5494 | target_id = i; |
| 5495 | if (i > 7 && (ahc->features & AHC_TWIN) != 0) { |
| 5496 | channel = 'B'; |
| 5497 | our_id = ahc->our_id_b; |
| 5498 | target_id = i % 8; |
| 5499 | } |
| 5500 | tinfo = ahc_fetch_transinfo(ahc, channel, our_id, |
| 5501 | target_id, &tstate); |
| 5502 | /* Default to async narrow across the board */ |
| 5503 | memset(tinfo, 0, sizeof(*tinfo)); |
| 5504 | if (ahc->flags & AHC_USEDEFAULTS) { |
| 5505 | if ((ahc->features & AHC_WIDE) != 0) |
| 5506 | tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT; |
| 5507 | |
| 5508 | /* |
| 5509 | * These will be truncated when we determine the |
| 5510 | * connection type we have with the target. |
| 5511 | */ |
| 5512 | tinfo->user.period = ahc_syncrates->period; |
| 5513 | tinfo->user.offset = MAX_OFFSET; |
| 5514 | } else { |
| 5515 | u_int scsirate; |
| 5516 | uint16_t mask; |
| 5517 | |
| 5518 | /* Take the settings leftover in scratch RAM. */ |
| 5519 | scsirate = ahc_inb(ahc, TARG_SCSIRATE + i); |
| 5520 | mask = (0x01 << i); |
| 5521 | if ((ahc->features & AHC_ULTRA2) != 0) { |
| 5522 | u_int offset; |
| 5523 | u_int maxsync; |
| 5524 | |
| 5525 | if ((scsirate & SOFS) == 0x0F) { |
| 5526 | /* |
| 5527 | * Haven't negotiated yet, |
| 5528 | * so the format is different. |
| 5529 | */ |
| 5530 | scsirate = (scsirate & SXFR) >> 4 |
| 5531 | | (ultraenb & mask) |
| 5532 | ? 0x08 : 0x0 |
| 5533 | | (scsirate & WIDEXFER); |
| 5534 | offset = MAX_OFFSET_ULTRA2; |
| 5535 | } else |
| 5536 | offset = ahc_inb(ahc, TARG_OFFSET + i); |
| 5537 | if ((scsirate & ~WIDEXFER) == 0 && offset != 0) |
| 5538 | /* Set to the lowest sync rate, 5MHz */ |
| 5539 | scsirate |= 0x1c; |
| 5540 | maxsync = AHC_SYNCRATE_ULTRA2; |
| 5541 | if ((ahc->features & AHC_DT) != 0) |
| 5542 | maxsync = AHC_SYNCRATE_DT; |
| 5543 | tinfo->user.period = |
| 5544 | ahc_find_period(ahc, scsirate, maxsync); |
| 5545 | if (offset == 0) |
| 5546 | tinfo->user.period = 0; |
| 5547 | else |
| 5548 | tinfo->user.offset = MAX_OFFSET; |
| 5549 | if ((scsirate & SXFR_ULTRA2) <= 8/*10MHz*/ |
| 5550 | && (ahc->features & AHC_DT) != 0) |
| 5551 | tinfo->user.ppr_options = |
| 5552 | MSG_EXT_PPR_DT_REQ; |
| 5553 | } else if ((scsirate & SOFS) != 0) { |
| 5554 | if ((scsirate & SXFR) == 0x40 |
| 5555 | && (ultraenb & mask) != 0) { |
| 5556 | /* Treat 10MHz as a non-ultra speed */ |
| 5557 | scsirate &= ~SXFR; |
| 5558 | ultraenb &= ~mask; |
| 5559 | } |
| 5560 | tinfo->user.period = |
| 5561 | ahc_find_period(ahc, scsirate, |
| 5562 | (ultraenb & mask) |
| 5563 | ? AHC_SYNCRATE_ULTRA |
| 5564 | : AHC_SYNCRATE_FAST); |
| 5565 | if (tinfo->user.period != 0) |
| 5566 | tinfo->user.offset = MAX_OFFSET; |
| 5567 | } |
| 5568 | if (tinfo->user.period == 0) |
| 5569 | tinfo->user.offset = 0; |
| 5570 | if ((scsirate & WIDEXFER) != 0 |
| 5571 | && (ahc->features & AHC_WIDE) != 0) |
| 5572 | tinfo->user.width = MSG_EXT_WDTR_BUS_16_BIT; |
| 5573 | tinfo->user.protocol_version = 4; |
| 5574 | if ((ahc->features & AHC_DT) != 0) |
| 5575 | tinfo->user.transport_version = 3; |
| 5576 | else |
| 5577 | tinfo->user.transport_version = 2; |
| 5578 | tinfo->goal.protocol_version = 2; |
| 5579 | tinfo->goal.transport_version = 2; |
| 5580 | tinfo->curr.protocol_version = 2; |
| 5581 | tinfo->curr.transport_version = 2; |
| 5582 | } |
| 5583 | tstate->ultraenb = 0; |
| 5584 | } |
| 5585 | ahc->user_discenable = discenable; |
| 5586 | ahc->user_tagenable = tagenable; |
| 5587 | |
| 5588 | return (ahc->bus_chip_init(ahc)); |
| 5589 | } |
| 5590 | |
| 5591 | void |
| 5592 | ahc_intr_enable(struct ahc_softc *ahc, int enable) |
| 5593 | { |
| 5594 | u_int hcntrl; |
| 5595 | |
| 5596 | hcntrl = ahc_inb(ahc, HCNTRL); |
| 5597 | hcntrl &= ~INTEN; |
| 5598 | ahc->pause &= ~INTEN; |
| 5599 | ahc->unpause &= ~INTEN; |
| 5600 | if (enable) { |
| 5601 | hcntrl |= INTEN; |
| 5602 | ahc->pause |= INTEN; |
| 5603 | ahc->unpause |= INTEN; |
| 5604 | } |
| 5605 | ahc_outb(ahc, HCNTRL, hcntrl); |
| 5606 | } |
| 5607 | |
| 5608 | /* |
| 5609 | * Ensure that the card is paused in a location |
| 5610 | * outside of all critical sections and that all |
| 5611 | * pending work is completed prior to returning. |
| 5612 | * This routine should only be called from outside |
| 5613 | * an interrupt context. |
| 5614 | */ |
| 5615 | void |
| 5616 | ahc_pause_and_flushwork(struct ahc_softc *ahc) |
| 5617 | { |
| 5618 | int intstat; |
| 5619 | int maxloops; |
| 5620 | int paused; |
| 5621 | |
| 5622 | maxloops = 1000; |
| 5623 | ahc->flags |= AHC_ALL_INTERRUPTS; |
| 5624 | paused = FALSE; |
| 5625 | do { |
James Bottomley | 79778a2 | 2005-08-04 17:33:22 -0500 | [diff] [blame] | 5626 | if (paused) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5627 | ahc_unpause(ahc); |
James Bottomley | 79778a2 | 2005-08-04 17:33:22 -0500 | [diff] [blame] | 5628 | /* |
| 5629 | * Give the sequencer some time to service |
| 5630 | * any active selections. |
| 5631 | */ |
| 5632 | ahc_delay(500); |
| 5633 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5634 | ahc_intr(ahc); |
| 5635 | ahc_pause(ahc); |
| 5636 | paused = TRUE; |
| 5637 | ahc_outb(ahc, SCSISEQ, ahc_inb(ahc, SCSISEQ) & ~ENSELO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5638 | intstat = ahc_inb(ahc, INTSTAT); |
James Bottomley | 79778a2 | 2005-08-04 17:33:22 -0500 | [diff] [blame] | 5639 | if ((intstat & INT_PEND) == 0) { |
| 5640 | ahc_clear_critical_section(ahc); |
| 5641 | intstat = ahc_inb(ahc, INTSTAT); |
| 5642 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5643 | } while (--maxloops |
| 5644 | && (intstat != 0xFF || (ahc->features & AHC_REMOVABLE) == 0) |
| 5645 | && ((intstat & INT_PEND) != 0 |
| 5646 | || (ahc_inb(ahc, SSTAT0) & (SELDO|SELINGO)) != 0)); |
| 5647 | if (maxloops == 0) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5648 | printk("Infinite interrupt loop, INTSTAT = %x", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5649 | ahc_inb(ahc, INTSTAT)); |
| 5650 | } |
| 5651 | ahc_platform_flushwork(ahc); |
| 5652 | ahc->flags &= ~AHC_ALL_INTERRUPTS; |
| 5653 | } |
| 5654 | |
FUJITA Tomonori | 03e7925 | 2008-01-27 00:08:19 +0900 | [diff] [blame] | 5655 | #ifdef CONFIG_PM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5656 | int |
| 5657 | ahc_suspend(struct ahc_softc *ahc) |
| 5658 | { |
| 5659 | |
| 5660 | ahc_pause_and_flushwork(ahc); |
| 5661 | |
| 5662 | if (LIST_FIRST(&ahc->pending_scbs) != NULL) { |
| 5663 | ahc_unpause(ahc); |
| 5664 | return (EBUSY); |
| 5665 | } |
| 5666 | |
| 5667 | #ifdef AHC_TARGET_MODE |
| 5668 | /* |
| 5669 | * XXX What about ATIOs that have not yet been serviced? |
| 5670 | * Perhaps we should just refuse to be suspended if we |
| 5671 | * are acting in a target role. |
| 5672 | */ |
| 5673 | if (ahc->pending_device != NULL) { |
| 5674 | ahc_unpause(ahc); |
| 5675 | return (EBUSY); |
| 5676 | } |
| 5677 | #endif |
| 5678 | ahc_shutdown(ahc); |
| 5679 | return (0); |
| 5680 | } |
| 5681 | |
| 5682 | int |
| 5683 | ahc_resume(struct ahc_softc *ahc) |
| 5684 | { |
| 5685 | |
| 5686 | ahc_reset(ahc, /*reinit*/TRUE); |
| 5687 | ahc_intr_enable(ahc, TRUE); |
| 5688 | ahc_restart(ahc); |
| 5689 | return (0); |
| 5690 | } |
FUJITA Tomonori | 03e7925 | 2008-01-27 00:08:19 +0900 | [diff] [blame] | 5691 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5692 | /************************** Busy Target Table *********************************/ |
| 5693 | /* |
| 5694 | * Return the untagged transaction id for a given target/channel lun. |
| 5695 | * Optionally, clear the entry. |
| 5696 | */ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 5697 | static u_int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5698 | ahc_index_busy_tcl(struct ahc_softc *ahc, u_int tcl) |
| 5699 | { |
| 5700 | u_int scbid; |
| 5701 | u_int target_offset; |
| 5702 | |
| 5703 | if ((ahc->flags & AHC_SCB_BTT) != 0) { |
| 5704 | u_int saved_scbptr; |
| 5705 | |
| 5706 | saved_scbptr = ahc_inb(ahc, SCBPTR); |
| 5707 | ahc_outb(ahc, SCBPTR, TCL_LUN(tcl)); |
| 5708 | scbid = ahc_inb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl)); |
| 5709 | ahc_outb(ahc, SCBPTR, saved_scbptr); |
| 5710 | } else { |
| 5711 | target_offset = TCL_TARGET_OFFSET(tcl); |
| 5712 | scbid = ahc_inb(ahc, BUSY_TARGETS + target_offset); |
| 5713 | } |
| 5714 | |
| 5715 | return (scbid); |
| 5716 | } |
| 5717 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 5718 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5719 | ahc_unbusy_tcl(struct ahc_softc *ahc, u_int tcl) |
| 5720 | { |
| 5721 | u_int target_offset; |
| 5722 | |
| 5723 | if ((ahc->flags & AHC_SCB_BTT) != 0) { |
| 5724 | u_int saved_scbptr; |
| 5725 | |
| 5726 | saved_scbptr = ahc_inb(ahc, SCBPTR); |
| 5727 | ahc_outb(ahc, SCBPTR, TCL_LUN(tcl)); |
| 5728 | ahc_outb(ahc, SCB_64_BTT+TCL_TARGET_OFFSET(tcl), SCB_LIST_NULL); |
| 5729 | ahc_outb(ahc, SCBPTR, saved_scbptr); |
| 5730 | } else { |
| 5731 | target_offset = TCL_TARGET_OFFSET(tcl); |
| 5732 | ahc_outb(ahc, BUSY_TARGETS + target_offset, SCB_LIST_NULL); |
| 5733 | } |
| 5734 | } |
| 5735 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 5736 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5737 | ahc_busy_tcl(struct ahc_softc *ahc, u_int tcl, u_int scbid) |
| 5738 | { |
| 5739 | u_int target_offset; |
| 5740 | |
| 5741 | if ((ahc->flags & AHC_SCB_BTT) != 0) { |
| 5742 | u_int saved_scbptr; |
| 5743 | |
| 5744 | saved_scbptr = ahc_inb(ahc, SCBPTR); |
| 5745 | ahc_outb(ahc, SCBPTR, TCL_LUN(tcl)); |
| 5746 | ahc_outb(ahc, SCB_64_BTT + TCL_TARGET_OFFSET(tcl), scbid); |
| 5747 | ahc_outb(ahc, SCBPTR, saved_scbptr); |
| 5748 | } else { |
| 5749 | target_offset = TCL_TARGET_OFFSET(tcl); |
| 5750 | ahc_outb(ahc, BUSY_TARGETS + target_offset, scbid); |
| 5751 | } |
| 5752 | } |
| 5753 | |
| 5754 | /************************** SCB and SCB queue management **********************/ |
| 5755 | int |
| 5756 | ahc_match_scb(struct ahc_softc *ahc, struct scb *scb, int target, |
| 5757 | char channel, int lun, u_int tag, role_t role) |
| 5758 | { |
| 5759 | int targ = SCB_GET_TARGET(ahc, scb); |
| 5760 | char chan = SCB_GET_CHANNEL(ahc, scb); |
| 5761 | int slun = SCB_GET_LUN(scb); |
| 5762 | int match; |
| 5763 | |
| 5764 | match = ((chan == channel) || (channel == ALL_CHANNELS)); |
| 5765 | if (match != 0) |
| 5766 | match = ((targ == target) || (target == CAM_TARGET_WILDCARD)); |
| 5767 | if (match != 0) |
| 5768 | match = ((lun == slun) || (lun == CAM_LUN_WILDCARD)); |
| 5769 | if (match != 0) { |
| 5770 | #ifdef AHC_TARGET_MODE |
| 5771 | int group; |
| 5772 | |
| 5773 | group = XPT_FC_GROUP(scb->io_ctx->ccb_h.func_code); |
| 5774 | if (role == ROLE_INITIATOR) { |
| 5775 | match = (group != XPT_FC_GROUP_TMODE) |
| 5776 | && ((tag == scb->hscb->tag) |
| 5777 | || (tag == SCB_LIST_NULL)); |
| 5778 | } else if (role == ROLE_TARGET) { |
| 5779 | match = (group == XPT_FC_GROUP_TMODE) |
| 5780 | && ((tag == scb->io_ctx->csio.tag_id) |
| 5781 | || (tag == SCB_LIST_NULL)); |
| 5782 | } |
| 5783 | #else /* !AHC_TARGET_MODE */ |
| 5784 | match = ((tag == scb->hscb->tag) || (tag == SCB_LIST_NULL)); |
| 5785 | #endif /* AHC_TARGET_MODE */ |
| 5786 | } |
| 5787 | |
| 5788 | return match; |
| 5789 | } |
| 5790 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 5791 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5792 | ahc_freeze_devq(struct ahc_softc *ahc, struct scb *scb) |
| 5793 | { |
| 5794 | int target; |
| 5795 | char channel; |
| 5796 | int lun; |
| 5797 | |
| 5798 | target = SCB_GET_TARGET(ahc, scb); |
| 5799 | lun = SCB_GET_LUN(scb); |
| 5800 | channel = SCB_GET_CHANNEL(ahc, scb); |
| 5801 | |
| 5802 | ahc_search_qinfifo(ahc, target, channel, lun, |
| 5803 | /*tag*/SCB_LIST_NULL, ROLE_UNKNOWN, |
| 5804 | CAM_REQUEUE_REQ, SEARCH_COMPLETE); |
| 5805 | |
| 5806 | ahc_platform_freeze_devq(ahc, scb); |
| 5807 | } |
| 5808 | |
| 5809 | void |
| 5810 | ahc_qinfifo_requeue_tail(struct ahc_softc *ahc, struct scb *scb) |
| 5811 | { |
| 5812 | struct scb *prev_scb; |
| 5813 | |
| 5814 | prev_scb = NULL; |
| 5815 | if (ahc_qinfifo_count(ahc) != 0) { |
| 5816 | u_int prev_tag; |
| 5817 | uint8_t prev_pos; |
| 5818 | |
| 5819 | prev_pos = ahc->qinfifonext - 1; |
| 5820 | prev_tag = ahc->qinfifo[prev_pos]; |
| 5821 | prev_scb = ahc_lookup_scb(ahc, prev_tag); |
| 5822 | } |
| 5823 | ahc_qinfifo_requeue(ahc, prev_scb, scb); |
| 5824 | if ((ahc->features & AHC_QUEUE_REGS) != 0) { |
| 5825 | ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); |
| 5826 | } else { |
| 5827 | ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); |
| 5828 | } |
| 5829 | } |
| 5830 | |
| 5831 | static void |
| 5832 | ahc_qinfifo_requeue(struct ahc_softc *ahc, struct scb *prev_scb, |
| 5833 | struct scb *scb) |
| 5834 | { |
| 5835 | if (prev_scb == NULL) { |
| 5836 | ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag); |
| 5837 | } else { |
| 5838 | prev_scb->hscb->next = scb->hscb->tag; |
| 5839 | ahc_sync_scb(ahc, prev_scb, |
| 5840 | BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); |
| 5841 | } |
| 5842 | ahc->qinfifo[ahc->qinfifonext++] = scb->hscb->tag; |
| 5843 | scb->hscb->next = ahc->next_queued_scb->hscb->tag; |
| 5844 | ahc_sync_scb(ahc, scb, BUS_DMASYNC_PREREAD|BUS_DMASYNC_PREWRITE); |
| 5845 | } |
| 5846 | |
| 5847 | static int |
| 5848 | ahc_qinfifo_count(struct ahc_softc *ahc) |
| 5849 | { |
| 5850 | uint8_t qinpos; |
| 5851 | uint8_t diff; |
| 5852 | |
| 5853 | if ((ahc->features & AHC_QUEUE_REGS) != 0) { |
| 5854 | qinpos = ahc_inb(ahc, SNSCB_QOFF); |
| 5855 | ahc_outb(ahc, SNSCB_QOFF, qinpos); |
| 5856 | } else |
| 5857 | qinpos = ahc_inb(ahc, QINPOS); |
| 5858 | diff = ahc->qinfifonext - qinpos; |
| 5859 | return (diff); |
| 5860 | } |
| 5861 | |
| 5862 | int |
| 5863 | ahc_search_qinfifo(struct ahc_softc *ahc, int target, char channel, |
| 5864 | int lun, u_int tag, role_t role, uint32_t status, |
| 5865 | ahc_search_action action) |
| 5866 | { |
| 5867 | struct scb *scb; |
| 5868 | struct scb *prev_scb; |
| 5869 | uint8_t qinstart; |
| 5870 | uint8_t qinpos; |
| 5871 | uint8_t qintail; |
| 5872 | uint8_t next; |
| 5873 | uint8_t prev; |
| 5874 | uint8_t curscbptr; |
| 5875 | int found; |
| 5876 | int have_qregs; |
| 5877 | |
| 5878 | qintail = ahc->qinfifonext; |
| 5879 | have_qregs = (ahc->features & AHC_QUEUE_REGS) != 0; |
| 5880 | if (have_qregs) { |
| 5881 | qinstart = ahc_inb(ahc, SNSCB_QOFF); |
| 5882 | ahc_outb(ahc, SNSCB_QOFF, qinstart); |
| 5883 | } else |
| 5884 | qinstart = ahc_inb(ahc, QINPOS); |
| 5885 | qinpos = qinstart; |
| 5886 | found = 0; |
| 5887 | prev_scb = NULL; |
| 5888 | |
| 5889 | if (action == SEARCH_COMPLETE) { |
| 5890 | /* |
| 5891 | * Don't attempt to run any queued untagged transactions |
| 5892 | * until we are done with the abort process. |
| 5893 | */ |
| 5894 | ahc_freeze_untagged_queues(ahc); |
| 5895 | } |
| 5896 | |
| 5897 | /* |
| 5898 | * Start with an empty queue. Entries that are not chosen |
| 5899 | * for removal will be re-added to the queue as we go. |
| 5900 | */ |
| 5901 | ahc->qinfifonext = qinpos; |
| 5902 | ahc_outb(ahc, NEXT_QUEUED_SCB, ahc->next_queued_scb->hscb->tag); |
| 5903 | |
| 5904 | while (qinpos != qintail) { |
| 5905 | scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinpos]); |
| 5906 | if (scb == NULL) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5907 | printk("qinpos = %d, SCB index = %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5908 | qinpos, ahc->qinfifo[qinpos]); |
| 5909 | panic("Loop 1\n"); |
| 5910 | } |
| 5911 | |
| 5912 | if (ahc_match_scb(ahc, scb, target, channel, lun, tag, role)) { |
| 5913 | /* |
| 5914 | * We found an scb that needs to be acted on. |
| 5915 | */ |
| 5916 | found++; |
| 5917 | switch (action) { |
| 5918 | case SEARCH_COMPLETE: |
| 5919 | { |
| 5920 | cam_status ostat; |
| 5921 | cam_status cstat; |
| 5922 | |
| 5923 | ostat = ahc_get_transaction_status(scb); |
| 5924 | if (ostat == CAM_REQ_INPROG) |
| 5925 | ahc_set_transaction_status(scb, status); |
| 5926 | cstat = ahc_get_transaction_status(scb); |
| 5927 | if (cstat != CAM_REQ_CMP) |
| 5928 | ahc_freeze_scb(scb); |
| 5929 | if ((scb->flags & SCB_ACTIVE) == 0) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5930 | printk("Inactive SCB in qinfifo\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5931 | ahc_done(ahc, scb); |
| 5932 | |
| 5933 | /* FALLTHROUGH */ |
| 5934 | } |
| 5935 | case SEARCH_REMOVE: |
| 5936 | break; |
| 5937 | case SEARCH_COUNT: |
| 5938 | ahc_qinfifo_requeue(ahc, prev_scb, scb); |
| 5939 | prev_scb = scb; |
| 5940 | break; |
| 5941 | } |
| 5942 | } else { |
| 5943 | ahc_qinfifo_requeue(ahc, prev_scb, scb); |
| 5944 | prev_scb = scb; |
| 5945 | } |
| 5946 | qinpos++; |
| 5947 | } |
| 5948 | |
| 5949 | if ((ahc->features & AHC_QUEUE_REGS) != 0) { |
| 5950 | ahc_outb(ahc, HNSCB_QOFF, ahc->qinfifonext); |
| 5951 | } else { |
| 5952 | ahc_outb(ahc, KERNEL_QINPOS, ahc->qinfifonext); |
| 5953 | } |
| 5954 | |
| 5955 | if (action != SEARCH_COUNT |
| 5956 | && (found != 0) |
| 5957 | && (qinstart != ahc->qinfifonext)) { |
| 5958 | /* |
| 5959 | * The sequencer may be in the process of dmaing |
| 5960 | * down the SCB at the beginning of the queue. |
| 5961 | * This could be problematic if either the first, |
| 5962 | * or the second SCB is removed from the queue |
| 5963 | * (the first SCB includes a pointer to the "next" |
| 5964 | * SCB to dma). If we have removed any entries, swap |
| 5965 | * the first element in the queue with the next HSCB |
| 5966 | * so the sequencer will notice that NEXT_QUEUED_SCB |
| 5967 | * has changed during its dma attempt and will retry |
| 5968 | * the DMA. |
| 5969 | */ |
| 5970 | scb = ahc_lookup_scb(ahc, ahc->qinfifo[qinstart]); |
| 5971 | |
| 5972 | if (scb == NULL) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 5973 | printk("found = %d, qinstart = %d, qinfifionext = %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5974 | found, qinstart, ahc->qinfifonext); |
| 5975 | panic("First/Second Qinfifo fixup\n"); |
| 5976 | } |
| 5977 | /* |
| 5978 | * ahc_swap_with_next_hscb forces our next pointer to |
| 5979 | * point to the reserved SCB for future commands. Save |
| 5980 | * and restore our original next pointer to maintain |
| 5981 | * queue integrity. |
| 5982 | */ |
| 5983 | next = scb->hscb->next; |
| 5984 | ahc->scb_data->scbindex[scb->hscb->tag] = NULL; |
| 5985 | ahc_swap_with_next_hscb(ahc, scb); |
| 5986 | scb->hscb->next = next; |
| 5987 | ahc->qinfifo[qinstart] = scb->hscb->tag; |
| 5988 | |
| 5989 | /* Tell the card about the new head of the qinfifo. */ |
| 5990 | ahc_outb(ahc, NEXT_QUEUED_SCB, scb->hscb->tag); |
| 5991 | |
| 5992 | /* Fixup the tail "next" pointer. */ |
| 5993 | qintail = ahc->qinfifonext - 1; |
| 5994 | scb = ahc_lookup_scb(ahc, ahc->qinfifo[qintail]); |
| 5995 | scb->hscb->next = ahc->next_queued_scb->hscb->tag; |
| 5996 | } |
| 5997 | |
| 5998 | /* |
| 5999 | * Search waiting for selection list. |
| 6000 | */ |
| 6001 | curscbptr = ahc_inb(ahc, SCBPTR); |
| 6002 | next = ahc_inb(ahc, WAITING_SCBH); /* Start at head of list. */ |
| 6003 | prev = SCB_LIST_NULL; |
| 6004 | |
| 6005 | while (next != SCB_LIST_NULL) { |
| 6006 | uint8_t scb_index; |
| 6007 | |
| 6008 | ahc_outb(ahc, SCBPTR, next); |
| 6009 | scb_index = ahc_inb(ahc, SCB_TAG); |
| 6010 | if (scb_index >= ahc->scb_data->numscbs) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 6011 | printk("Waiting List inconsistency. " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6012 | "SCB index == %d, yet numscbs == %d.", |
| 6013 | scb_index, ahc->scb_data->numscbs); |
| 6014 | ahc_dump_card_state(ahc); |
| 6015 | panic("for safety"); |
| 6016 | } |
| 6017 | scb = ahc_lookup_scb(ahc, scb_index); |
| 6018 | if (scb == NULL) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 6019 | printk("scb_index = %d, next = %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6020 | scb_index, next); |
| 6021 | panic("Waiting List traversal\n"); |
| 6022 | } |
| 6023 | if (ahc_match_scb(ahc, scb, target, channel, |
| 6024 | lun, SCB_LIST_NULL, role)) { |
| 6025 | /* |
| 6026 | * We found an scb that needs to be acted on. |
| 6027 | */ |
| 6028 | found++; |
| 6029 | switch (action) { |
| 6030 | case SEARCH_COMPLETE: |
| 6031 | { |
| 6032 | cam_status ostat; |
| 6033 | cam_status cstat; |
| 6034 | |
| 6035 | ostat = ahc_get_transaction_status(scb); |
| 6036 | if (ostat == CAM_REQ_INPROG) |
| 6037 | ahc_set_transaction_status(scb, |
| 6038 | status); |
| 6039 | cstat = ahc_get_transaction_status(scb); |
| 6040 | if (cstat != CAM_REQ_CMP) |
| 6041 | ahc_freeze_scb(scb); |
| 6042 | if ((scb->flags & SCB_ACTIVE) == 0) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 6043 | printk("Inactive SCB in Waiting List\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6044 | ahc_done(ahc, scb); |
| 6045 | /* FALLTHROUGH */ |
| 6046 | } |
| 6047 | case SEARCH_REMOVE: |
| 6048 | next = ahc_rem_wscb(ahc, next, prev); |
| 6049 | break; |
| 6050 | case SEARCH_COUNT: |
| 6051 | prev = next; |
| 6052 | next = ahc_inb(ahc, SCB_NEXT); |
| 6053 | break; |
| 6054 | } |
| 6055 | } else { |
| 6056 | |
| 6057 | prev = next; |
| 6058 | next = ahc_inb(ahc, SCB_NEXT); |
| 6059 | } |
| 6060 | } |
| 6061 | ahc_outb(ahc, SCBPTR, curscbptr); |
| 6062 | |
| 6063 | found += ahc_search_untagged_queues(ahc, /*ahc_io_ctx_t*/NULL, target, |
| 6064 | channel, lun, status, action); |
| 6065 | |
| 6066 | if (action == SEARCH_COMPLETE) |
| 6067 | ahc_release_untagged_queues(ahc); |
| 6068 | return (found); |
| 6069 | } |
| 6070 | |
| 6071 | int |
| 6072 | ahc_search_untagged_queues(struct ahc_softc *ahc, ahc_io_ctx_t ctx, |
| 6073 | int target, char channel, int lun, uint32_t status, |
| 6074 | ahc_search_action action) |
| 6075 | { |
| 6076 | struct scb *scb; |
| 6077 | int maxtarget; |
| 6078 | int found; |
| 6079 | int i; |
| 6080 | |
| 6081 | if (action == SEARCH_COMPLETE) { |
| 6082 | /* |
| 6083 | * Don't attempt to run any queued untagged transactions |
| 6084 | * until we are done with the abort process. |
| 6085 | */ |
| 6086 | ahc_freeze_untagged_queues(ahc); |
| 6087 | } |
| 6088 | |
| 6089 | found = 0; |
| 6090 | i = 0; |
| 6091 | if ((ahc->flags & AHC_SCB_BTT) == 0) { |
| 6092 | |
| 6093 | maxtarget = 16; |
| 6094 | if (target != CAM_TARGET_WILDCARD) { |
| 6095 | |
| 6096 | i = target; |
| 6097 | if (channel == 'B') |
| 6098 | i += 8; |
| 6099 | maxtarget = i + 1; |
| 6100 | } |
| 6101 | } else { |
| 6102 | maxtarget = 0; |
| 6103 | } |
| 6104 | |
| 6105 | for (; i < maxtarget; i++) { |
| 6106 | struct scb_tailq *untagged_q; |
| 6107 | struct scb *next_scb; |
| 6108 | |
| 6109 | untagged_q = &(ahc->untagged_queues[i]); |
| 6110 | next_scb = TAILQ_FIRST(untagged_q); |
| 6111 | while (next_scb != NULL) { |
| 6112 | |
| 6113 | scb = next_scb; |
| 6114 | next_scb = TAILQ_NEXT(scb, links.tqe); |
| 6115 | |
| 6116 | /* |
| 6117 | * The head of the list may be the currently |
| 6118 | * active untagged command for a device. |
| 6119 | * We're only searching for commands that |
| 6120 | * have not been started. A transaction |
| 6121 | * marked active but still in the qinfifo |
| 6122 | * is removed by the qinfifo scanning code |
| 6123 | * above. |
| 6124 | */ |
| 6125 | if ((scb->flags & SCB_ACTIVE) != 0) |
| 6126 | continue; |
| 6127 | |
| 6128 | if (ahc_match_scb(ahc, scb, target, channel, lun, |
| 6129 | SCB_LIST_NULL, ROLE_INITIATOR) == 0 |
| 6130 | || (ctx != NULL && ctx != scb->io_ctx)) |
| 6131 | continue; |
| 6132 | |
| 6133 | /* |
| 6134 | * We found an scb that needs to be acted on. |
| 6135 | */ |
| 6136 | found++; |
| 6137 | switch (action) { |
| 6138 | case SEARCH_COMPLETE: |
| 6139 | { |
| 6140 | cam_status ostat; |
| 6141 | cam_status cstat; |
| 6142 | |
| 6143 | ostat = ahc_get_transaction_status(scb); |
| 6144 | if (ostat == CAM_REQ_INPROG) |
| 6145 | ahc_set_transaction_status(scb, status); |
| 6146 | cstat = ahc_get_transaction_status(scb); |
| 6147 | if (cstat != CAM_REQ_CMP) |
| 6148 | ahc_freeze_scb(scb); |
| 6149 | if ((scb->flags & SCB_ACTIVE) == 0) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 6150 | printk("Inactive SCB in untaggedQ\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6151 | ahc_done(ahc, scb); |
| 6152 | break; |
| 6153 | } |
| 6154 | case SEARCH_REMOVE: |
| 6155 | scb->flags &= ~SCB_UNTAGGEDQ; |
| 6156 | TAILQ_REMOVE(untagged_q, scb, links.tqe); |
| 6157 | break; |
| 6158 | case SEARCH_COUNT: |
| 6159 | break; |
| 6160 | } |
| 6161 | } |
| 6162 | } |
| 6163 | |
| 6164 | if (action == SEARCH_COMPLETE) |
| 6165 | ahc_release_untagged_queues(ahc); |
| 6166 | return (found); |
| 6167 | } |
| 6168 | |
| 6169 | int |
| 6170 | ahc_search_disc_list(struct ahc_softc *ahc, int target, char channel, |
| 6171 | int lun, u_int tag, int stop_on_first, int remove, |
| 6172 | int save_state) |
| 6173 | { |
| 6174 | struct scb *scbp; |
| 6175 | u_int next; |
| 6176 | u_int prev; |
| 6177 | u_int count; |
| 6178 | u_int active_scb; |
| 6179 | |
| 6180 | count = 0; |
| 6181 | next = ahc_inb(ahc, DISCONNECTED_SCBH); |
| 6182 | prev = SCB_LIST_NULL; |
| 6183 | |
| 6184 | if (save_state) { |
| 6185 | /* restore this when we're done */ |
| 6186 | active_scb = ahc_inb(ahc, SCBPTR); |
| 6187 | } else |
| 6188 | /* Silence compiler */ |
| 6189 | active_scb = SCB_LIST_NULL; |
| 6190 | |
| 6191 | while (next != SCB_LIST_NULL) { |
| 6192 | u_int scb_index; |
| 6193 | |
| 6194 | ahc_outb(ahc, SCBPTR, next); |
| 6195 | scb_index = ahc_inb(ahc, SCB_TAG); |
| 6196 | if (scb_index >= ahc->scb_data->numscbs) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 6197 | printk("Disconnected List inconsistency. " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6198 | "SCB index == %d, yet numscbs == %d.", |
| 6199 | scb_index, ahc->scb_data->numscbs); |
| 6200 | ahc_dump_card_state(ahc); |
| 6201 | panic("for safety"); |
| 6202 | } |
| 6203 | |
| 6204 | if (next == prev) { |
| 6205 | panic("Disconnected List Loop. " |
| 6206 | "cur SCBPTR == %x, prev SCBPTR == %x.", |
| 6207 | next, prev); |
| 6208 | } |
| 6209 | scbp = ahc_lookup_scb(ahc, scb_index); |
| 6210 | if (ahc_match_scb(ahc, scbp, target, channel, lun, |
| 6211 | tag, ROLE_INITIATOR)) { |
| 6212 | count++; |
| 6213 | if (remove) { |
| 6214 | next = |
| 6215 | ahc_rem_scb_from_disc_list(ahc, prev, next); |
| 6216 | } else { |
| 6217 | prev = next; |
| 6218 | next = ahc_inb(ahc, SCB_NEXT); |
| 6219 | } |
| 6220 | if (stop_on_first) |
| 6221 | break; |
| 6222 | } else { |
| 6223 | prev = next; |
| 6224 | next = ahc_inb(ahc, SCB_NEXT); |
| 6225 | } |
| 6226 | } |
| 6227 | if (save_state) |
| 6228 | ahc_outb(ahc, SCBPTR, active_scb); |
| 6229 | return (count); |
| 6230 | } |
| 6231 | |
| 6232 | /* |
| 6233 | * Remove an SCB from the on chip list of disconnected transactions. |
| 6234 | * This is empty/unused if we are not performing SCB paging. |
| 6235 | */ |
| 6236 | static u_int |
| 6237 | ahc_rem_scb_from_disc_list(struct ahc_softc *ahc, u_int prev, u_int scbptr) |
| 6238 | { |
| 6239 | u_int next; |
| 6240 | |
| 6241 | ahc_outb(ahc, SCBPTR, scbptr); |
| 6242 | next = ahc_inb(ahc, SCB_NEXT); |
| 6243 | |
| 6244 | ahc_outb(ahc, SCB_CONTROL, 0); |
| 6245 | |
| 6246 | ahc_add_curscb_to_free_list(ahc); |
| 6247 | |
| 6248 | if (prev != SCB_LIST_NULL) { |
| 6249 | ahc_outb(ahc, SCBPTR, prev); |
| 6250 | ahc_outb(ahc, SCB_NEXT, next); |
| 6251 | } else |
| 6252 | ahc_outb(ahc, DISCONNECTED_SCBH, next); |
| 6253 | |
| 6254 | return (next); |
| 6255 | } |
| 6256 | |
| 6257 | /* |
| 6258 | * Add the SCB as selected by SCBPTR onto the on chip list of |
| 6259 | * free hardware SCBs. This list is empty/unused if we are not |
| 6260 | * performing SCB paging. |
| 6261 | */ |
| 6262 | static void |
| 6263 | ahc_add_curscb_to_free_list(struct ahc_softc *ahc) |
| 6264 | { |
| 6265 | /* |
| 6266 | * Invalidate the tag so that our abort |
| 6267 | * routines don't think it's active. |
| 6268 | */ |
| 6269 | ahc_outb(ahc, SCB_TAG, SCB_LIST_NULL); |
| 6270 | |
| 6271 | if ((ahc->flags & AHC_PAGESCBS) != 0) { |
| 6272 | ahc_outb(ahc, SCB_NEXT, ahc_inb(ahc, FREE_SCBH)); |
| 6273 | ahc_outb(ahc, FREE_SCBH, ahc_inb(ahc, SCBPTR)); |
| 6274 | } |
| 6275 | } |
| 6276 | |
| 6277 | /* |
| 6278 | * Manipulate the waiting for selection list and return the |
| 6279 | * scb that follows the one that we remove. |
| 6280 | */ |
| 6281 | static u_int |
| 6282 | ahc_rem_wscb(struct ahc_softc *ahc, u_int scbpos, u_int prev) |
Denys Vlasenko | be0d676 | 2008-03-23 04:41:22 +0100 | [diff] [blame] | 6283 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6284 | u_int curscb, next; |
| 6285 | |
| 6286 | /* |
| 6287 | * Select the SCB we want to abort and |
| 6288 | * pull the next pointer out of it. |
| 6289 | */ |
| 6290 | curscb = ahc_inb(ahc, SCBPTR); |
| 6291 | ahc_outb(ahc, SCBPTR, scbpos); |
| 6292 | next = ahc_inb(ahc, SCB_NEXT); |
| 6293 | |
| 6294 | /* Clear the necessary fields */ |
| 6295 | ahc_outb(ahc, SCB_CONTROL, 0); |
| 6296 | |
| 6297 | ahc_add_curscb_to_free_list(ahc); |
| 6298 | |
| 6299 | /* update the waiting list */ |
| 6300 | if (prev == SCB_LIST_NULL) { |
| 6301 | /* First in the list */ |
| 6302 | ahc_outb(ahc, WAITING_SCBH, next); |
| 6303 | |
| 6304 | /* |
| 6305 | * Ensure we aren't attempting to perform |
| 6306 | * selection for this entry. |
| 6307 | */ |
| 6308 | ahc_outb(ahc, SCSISEQ, (ahc_inb(ahc, SCSISEQ) & ~ENSELO)); |
| 6309 | } else { |
| 6310 | /* |
| 6311 | * Select the scb that pointed to us |
| 6312 | * and update its next pointer. |
| 6313 | */ |
| 6314 | ahc_outb(ahc, SCBPTR, prev); |
| 6315 | ahc_outb(ahc, SCB_NEXT, next); |
| 6316 | } |
| 6317 | |
| 6318 | /* |
| 6319 | * Point us back at the original scb position. |
| 6320 | */ |
| 6321 | ahc_outb(ahc, SCBPTR, curscb); |
| 6322 | return next; |
| 6323 | } |
| 6324 | |
| 6325 | /******************************** Error Handling ******************************/ |
| 6326 | /* |
| 6327 | * Abort all SCBs that match the given description (target/channel/lun/tag), |
| 6328 | * setting their status to the passed in status if the status has not already |
| 6329 | * been modified from CAM_REQ_INPROG. This routine assumes that the sequencer |
| 6330 | * is paused before it is called. |
| 6331 | */ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 6332 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6333 | ahc_abort_scbs(struct ahc_softc *ahc, int target, char channel, |
| 6334 | int lun, u_int tag, role_t role, uint32_t status) |
| 6335 | { |
| 6336 | struct scb *scbp; |
| 6337 | struct scb *scbp_next; |
| 6338 | u_int active_scb; |
| 6339 | int i, j; |
| 6340 | int maxtarget; |
| 6341 | int minlun; |
| 6342 | int maxlun; |
| 6343 | |
| 6344 | int found; |
| 6345 | |
| 6346 | /* |
| 6347 | * Don't attempt to run any queued untagged transactions |
| 6348 | * until we are done with the abort process. |
| 6349 | */ |
| 6350 | ahc_freeze_untagged_queues(ahc); |
| 6351 | |
| 6352 | /* restore this when we're done */ |
| 6353 | active_scb = ahc_inb(ahc, SCBPTR); |
| 6354 | |
| 6355 | found = ahc_search_qinfifo(ahc, target, channel, lun, SCB_LIST_NULL, |
| 6356 | role, CAM_REQUEUE_REQ, SEARCH_COMPLETE); |
| 6357 | |
| 6358 | /* |
| 6359 | * Clean out the busy target table for any untagged commands. |
| 6360 | */ |
| 6361 | i = 0; |
| 6362 | maxtarget = 16; |
| 6363 | if (target != CAM_TARGET_WILDCARD) { |
| 6364 | i = target; |
| 6365 | if (channel == 'B') |
| 6366 | i += 8; |
| 6367 | maxtarget = i + 1; |
| 6368 | } |
| 6369 | |
| 6370 | if (lun == CAM_LUN_WILDCARD) { |
| 6371 | |
| 6372 | /* |
| 6373 | * Unless we are using an SCB based |
| 6374 | * busy targets table, there is only |
| 6375 | * one table entry for all luns of |
| 6376 | * a target. |
| 6377 | */ |
| 6378 | minlun = 0; |
| 6379 | maxlun = 1; |
| 6380 | if ((ahc->flags & AHC_SCB_BTT) != 0) |
| 6381 | maxlun = AHC_NUM_LUNS; |
| 6382 | } else { |
| 6383 | minlun = lun; |
| 6384 | maxlun = lun + 1; |
| 6385 | } |
| 6386 | |
| 6387 | if (role != ROLE_TARGET) { |
| 6388 | for (;i < maxtarget; i++) { |
| 6389 | for (j = minlun;j < maxlun; j++) { |
| 6390 | u_int scbid; |
| 6391 | u_int tcl; |
| 6392 | |
| 6393 | tcl = BUILD_TCL(i << 4, j); |
| 6394 | scbid = ahc_index_busy_tcl(ahc, tcl); |
| 6395 | scbp = ahc_lookup_scb(ahc, scbid); |
| 6396 | if (scbp == NULL |
| 6397 | || ahc_match_scb(ahc, scbp, target, channel, |
| 6398 | lun, tag, role) == 0) |
| 6399 | continue; |
| 6400 | ahc_unbusy_tcl(ahc, BUILD_TCL(i << 4, j)); |
| 6401 | } |
| 6402 | } |
| 6403 | |
| 6404 | /* |
| 6405 | * Go through the disconnected list and remove any entries we |
| 6406 | * have queued for completion, 0'ing their control byte too. |
| 6407 | * We save the active SCB and restore it ourselves, so there |
| 6408 | * is no reason for this search to restore it too. |
| 6409 | */ |
| 6410 | ahc_search_disc_list(ahc, target, channel, lun, tag, |
| 6411 | /*stop_on_first*/FALSE, /*remove*/TRUE, |
| 6412 | /*save_state*/FALSE); |
| 6413 | } |
| 6414 | |
| 6415 | /* |
| 6416 | * Go through the hardware SCB array looking for commands that |
| 6417 | * were active but not on any list. In some cases, these remnants |
| 6418 | * might not still have mappings in the scbindex array (e.g. unexpected |
| 6419 | * bus free with the same scb queued for an abort). Don't hold this |
| 6420 | * against them. |
| 6421 | */ |
| 6422 | for (i = 0; i < ahc->scb_data->maxhscbs; i++) { |
| 6423 | u_int scbid; |
| 6424 | |
| 6425 | ahc_outb(ahc, SCBPTR, i); |
| 6426 | scbid = ahc_inb(ahc, SCB_TAG); |
| 6427 | scbp = ahc_lookup_scb(ahc, scbid); |
| 6428 | if ((scbp == NULL && scbid != SCB_LIST_NULL) |
| 6429 | || (scbp != NULL |
| 6430 | && ahc_match_scb(ahc, scbp, target, channel, lun, tag, role))) |
| 6431 | ahc_add_curscb_to_free_list(ahc); |
| 6432 | } |
| 6433 | |
| 6434 | /* |
| 6435 | * Go through the pending CCB list and look for |
| 6436 | * commands for this target that are still active. |
| 6437 | * These are other tagged commands that were |
| 6438 | * disconnected when the reset occurred. |
| 6439 | */ |
| 6440 | scbp_next = LIST_FIRST(&ahc->pending_scbs); |
| 6441 | while (scbp_next != NULL) { |
| 6442 | scbp = scbp_next; |
| 6443 | scbp_next = LIST_NEXT(scbp, pending_links); |
| 6444 | if (ahc_match_scb(ahc, scbp, target, channel, lun, tag, role)) { |
| 6445 | cam_status ostat; |
| 6446 | |
| 6447 | ostat = ahc_get_transaction_status(scbp); |
| 6448 | if (ostat == CAM_REQ_INPROG) |
| 6449 | ahc_set_transaction_status(scbp, status); |
| 6450 | if (ahc_get_transaction_status(scbp) != CAM_REQ_CMP) |
| 6451 | ahc_freeze_scb(scbp); |
| 6452 | if ((scbp->flags & SCB_ACTIVE) == 0) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 6453 | printk("Inactive SCB on pending list\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6454 | ahc_done(ahc, scbp); |
| 6455 | found++; |
| 6456 | } |
| 6457 | } |
| 6458 | ahc_outb(ahc, SCBPTR, active_scb); |
| 6459 | ahc_platform_abort_scbs(ahc, target, channel, lun, tag, role, status); |
| 6460 | ahc_release_untagged_queues(ahc); |
| 6461 | return found; |
| 6462 | } |
| 6463 | |
| 6464 | static void |
| 6465 | ahc_reset_current_bus(struct ahc_softc *ahc) |
| 6466 | { |
| 6467 | uint8_t scsiseq; |
| 6468 | |
| 6469 | ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) & ~ENSCSIRST); |
| 6470 | scsiseq = ahc_inb(ahc, SCSISEQ); |
| 6471 | ahc_outb(ahc, SCSISEQ, scsiseq | SCSIRSTO); |
| 6472 | ahc_flush_device_writes(ahc); |
| 6473 | ahc_delay(AHC_BUSRESET_DELAY); |
| 6474 | /* Turn off the bus reset */ |
| 6475 | ahc_outb(ahc, SCSISEQ, scsiseq & ~SCSIRSTO); |
| 6476 | |
| 6477 | ahc_clear_intstat(ahc); |
| 6478 | |
| 6479 | /* Re-enable reset interrupts */ |
| 6480 | ahc_outb(ahc, SIMODE1, ahc_inb(ahc, SIMODE1) | ENSCSIRST); |
| 6481 | } |
| 6482 | |
| 6483 | int |
| 6484 | ahc_reset_channel(struct ahc_softc *ahc, char channel, int initiate_reset) |
| 6485 | { |
| 6486 | struct ahc_devinfo devinfo; |
| 6487 | u_int initiator, target, max_scsiid; |
| 6488 | u_int sblkctl; |
| 6489 | u_int scsiseq; |
| 6490 | u_int simode1; |
| 6491 | int found; |
| 6492 | int restart_needed; |
| 6493 | char cur_channel; |
| 6494 | |
| 6495 | ahc->pending_device = NULL; |
| 6496 | |
| 6497 | ahc_compile_devinfo(&devinfo, |
| 6498 | CAM_TARGET_WILDCARD, |
| 6499 | CAM_TARGET_WILDCARD, |
| 6500 | CAM_LUN_WILDCARD, |
| 6501 | channel, ROLE_UNKNOWN); |
| 6502 | ahc_pause(ahc); |
| 6503 | |
| 6504 | /* Make sure the sequencer is in a safe location. */ |
| 6505 | ahc_clear_critical_section(ahc); |
| 6506 | |
| 6507 | /* |
| 6508 | * Run our command complete fifos to ensure that we perform |
| 6509 | * completion processing on any commands that 'completed' |
| 6510 | * before the reset occurred. |
| 6511 | */ |
| 6512 | ahc_run_qoutfifo(ahc); |
| 6513 | #ifdef AHC_TARGET_MODE |
| 6514 | /* |
| 6515 | * XXX - In Twin mode, the tqinfifo may have commands |
| 6516 | * for an unaffected channel in it. However, if |
| 6517 | * we have run out of ATIO resources to drain that |
| 6518 | * queue, we may not get them all out here. Further, |
| 6519 | * the blocked transactions for the reset channel |
| 6520 | * should just be killed off, irrespecitve of whether |
| 6521 | * we are blocked on ATIO resources. Write a routine |
| 6522 | * to compact the tqinfifo appropriately. |
| 6523 | */ |
| 6524 | if ((ahc->flags & AHC_TARGETROLE) != 0) { |
| 6525 | ahc_run_tqinfifo(ahc, /*paused*/TRUE); |
| 6526 | } |
| 6527 | #endif |
| 6528 | |
| 6529 | /* |
| 6530 | * Reset the bus if we are initiating this reset |
| 6531 | */ |
| 6532 | sblkctl = ahc_inb(ahc, SBLKCTL); |
| 6533 | cur_channel = 'A'; |
| 6534 | if ((ahc->features & AHC_TWIN) != 0 |
| 6535 | && ((sblkctl & SELBUSB) != 0)) |
| 6536 | cur_channel = 'B'; |
| 6537 | scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE); |
| 6538 | if (cur_channel != channel) { |
| 6539 | /* Case 1: Command for another bus is active |
| 6540 | * Stealthily reset the other bus without |
| 6541 | * upsetting the current bus. |
| 6542 | */ |
| 6543 | ahc_outb(ahc, SBLKCTL, sblkctl ^ SELBUSB); |
| 6544 | simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST); |
| 6545 | #ifdef AHC_TARGET_MODE |
| 6546 | /* |
| 6547 | * Bus resets clear ENSELI, so we cannot |
| 6548 | * defer re-enabling bus reset interrupts |
| 6549 | * if we are in target mode. |
| 6550 | */ |
| 6551 | if ((ahc->flags & AHC_TARGETROLE) != 0) |
| 6552 | simode1 |= ENSCSIRST; |
| 6553 | #endif |
| 6554 | ahc_outb(ahc, SIMODE1, simode1); |
| 6555 | if (initiate_reset) |
| 6556 | ahc_reset_current_bus(ahc); |
| 6557 | ahc_clear_intstat(ahc); |
| 6558 | ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP)); |
| 6559 | ahc_outb(ahc, SBLKCTL, sblkctl); |
| 6560 | restart_needed = FALSE; |
| 6561 | } else { |
| 6562 | /* Case 2: A command from this bus is active or we're idle */ |
| 6563 | simode1 = ahc_inb(ahc, SIMODE1) & ~(ENBUSFREE|ENSCSIRST); |
| 6564 | #ifdef AHC_TARGET_MODE |
| 6565 | /* |
| 6566 | * Bus resets clear ENSELI, so we cannot |
| 6567 | * defer re-enabling bus reset interrupts |
| 6568 | * if we are in target mode. |
| 6569 | */ |
| 6570 | if ((ahc->flags & AHC_TARGETROLE) != 0) |
| 6571 | simode1 |= ENSCSIRST; |
| 6572 | #endif |
| 6573 | ahc_outb(ahc, SIMODE1, simode1); |
| 6574 | if (initiate_reset) |
| 6575 | ahc_reset_current_bus(ahc); |
| 6576 | ahc_clear_intstat(ahc); |
| 6577 | ahc_outb(ahc, SCSISEQ, scsiseq & (ENSELI|ENRSELI|ENAUTOATNP)); |
| 6578 | restart_needed = TRUE; |
| 6579 | } |
| 6580 | |
| 6581 | /* |
| 6582 | * Clean up all the state information for the |
| 6583 | * pending transactions on this bus. |
| 6584 | */ |
| 6585 | found = ahc_abort_scbs(ahc, CAM_TARGET_WILDCARD, channel, |
| 6586 | CAM_LUN_WILDCARD, SCB_LIST_NULL, |
| 6587 | ROLE_UNKNOWN, CAM_SCSI_BUS_RESET); |
| 6588 | |
| 6589 | max_scsiid = (ahc->features & AHC_WIDE) ? 15 : 7; |
| 6590 | |
| 6591 | #ifdef AHC_TARGET_MODE |
| 6592 | /* |
| 6593 | * Send an immediate notify ccb to all target more peripheral |
| 6594 | * drivers affected by this action. |
| 6595 | */ |
| 6596 | for (target = 0; target <= max_scsiid; target++) { |
| 6597 | struct ahc_tmode_tstate* tstate; |
| 6598 | u_int lun; |
| 6599 | |
| 6600 | tstate = ahc->enabled_targets[target]; |
| 6601 | if (tstate == NULL) |
| 6602 | continue; |
| 6603 | for (lun = 0; lun < AHC_NUM_LUNS; lun++) { |
| 6604 | struct ahc_tmode_lstate* lstate; |
| 6605 | |
| 6606 | lstate = tstate->enabled_luns[lun]; |
| 6607 | if (lstate == NULL) |
| 6608 | continue; |
| 6609 | |
| 6610 | ahc_queue_lstate_event(ahc, lstate, CAM_TARGET_WILDCARD, |
| 6611 | EVENT_TYPE_BUS_RESET, /*arg*/0); |
| 6612 | ahc_send_lstate_events(ahc, lstate); |
| 6613 | } |
| 6614 | } |
| 6615 | #endif |
| 6616 | /* Notify the XPT that a bus reset occurred */ |
| 6617 | ahc_send_async(ahc, devinfo.channel, CAM_TARGET_WILDCARD, |
Hannes Reinecke | 9080063 | 2006-10-23 15:25:36 +0200 | [diff] [blame] | 6618 | CAM_LUN_WILDCARD, AC_BUS_RESET); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6619 | |
| 6620 | /* |
| 6621 | * Revert to async/narrow transfers until we renegotiate. |
| 6622 | */ |
| 6623 | for (target = 0; target <= max_scsiid; target++) { |
| 6624 | |
| 6625 | if (ahc->enabled_targets[target] == NULL) |
| 6626 | continue; |
| 6627 | for (initiator = 0; initiator <= max_scsiid; initiator++) { |
| 6628 | struct ahc_devinfo devinfo; |
| 6629 | |
| 6630 | ahc_compile_devinfo(&devinfo, target, initiator, |
| 6631 | CAM_LUN_WILDCARD, |
| 6632 | channel, ROLE_UNKNOWN); |
| 6633 | ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, |
| 6634 | AHC_TRANS_CUR, /*paused*/TRUE); |
| 6635 | ahc_set_syncrate(ahc, &devinfo, /*syncrate*/NULL, |
| 6636 | /*period*/0, /*offset*/0, |
| 6637 | /*ppr_options*/0, AHC_TRANS_CUR, |
| 6638 | /*paused*/TRUE); |
| 6639 | } |
| 6640 | } |
| 6641 | |
| 6642 | if (restart_needed) |
| 6643 | ahc_restart(ahc); |
| 6644 | else |
| 6645 | ahc_unpause(ahc); |
| 6646 | return found; |
| 6647 | } |
| 6648 | |
| 6649 | |
| 6650 | /***************************** Residual Processing ****************************/ |
| 6651 | /* |
| 6652 | * Calculate the residual for a just completed SCB. |
| 6653 | */ |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 6654 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6655 | ahc_calc_residual(struct ahc_softc *ahc, struct scb *scb) |
| 6656 | { |
| 6657 | struct hardware_scb *hscb; |
| 6658 | struct status_pkt *spkt; |
| 6659 | uint32_t sgptr; |
| 6660 | uint32_t resid_sgptr; |
| 6661 | uint32_t resid; |
| 6662 | |
| 6663 | /* |
| 6664 | * 5 cases. |
| 6665 | * 1) No residual. |
| 6666 | * SG_RESID_VALID clear in sgptr. |
| 6667 | * 2) Transferless command |
| 6668 | * 3) Never performed any transfers. |
| 6669 | * sgptr has SG_FULL_RESID set. |
| 6670 | * 4) No residual but target did not |
| 6671 | * save data pointers after the |
| 6672 | * last transfer, so sgptr was |
| 6673 | * never updated. |
| 6674 | * 5) We have a partial residual. |
| 6675 | * Use residual_sgptr to determine |
| 6676 | * where we are. |
| 6677 | */ |
| 6678 | |
| 6679 | hscb = scb->hscb; |
| 6680 | sgptr = ahc_le32toh(hscb->sgptr); |
| 6681 | if ((sgptr & SG_RESID_VALID) == 0) |
| 6682 | /* Case 1 */ |
| 6683 | return; |
| 6684 | sgptr &= ~SG_RESID_VALID; |
| 6685 | |
| 6686 | if ((sgptr & SG_LIST_NULL) != 0) |
| 6687 | /* Case 2 */ |
| 6688 | return; |
| 6689 | |
| 6690 | spkt = &hscb->shared_data.status; |
| 6691 | resid_sgptr = ahc_le32toh(spkt->residual_sg_ptr); |
| 6692 | if ((sgptr & SG_FULL_RESID) != 0) { |
| 6693 | /* Case 3 */ |
| 6694 | resid = ahc_get_transfer_length(scb); |
| 6695 | } else if ((resid_sgptr & SG_LIST_NULL) != 0) { |
| 6696 | /* Case 4 */ |
| 6697 | return; |
| 6698 | } else if ((resid_sgptr & ~SG_PTR_MASK) != 0) { |
| 6699 | panic("Bogus resid sgptr value 0x%x\n", resid_sgptr); |
| 6700 | } else { |
| 6701 | struct ahc_dma_seg *sg; |
| 6702 | |
| 6703 | /* |
| 6704 | * Remainder of the SG where the transfer |
| 6705 | * stopped. |
| 6706 | */ |
| 6707 | resid = ahc_le32toh(spkt->residual_datacnt) & AHC_SG_LEN_MASK; |
| 6708 | sg = ahc_sg_bus_to_virt(scb, resid_sgptr & SG_PTR_MASK); |
| 6709 | |
| 6710 | /* The residual sg_ptr always points to the next sg */ |
| 6711 | sg--; |
| 6712 | |
| 6713 | /* |
| 6714 | * Add up the contents of all residual |
| 6715 | * SG segments that are after the SG where |
| 6716 | * the transfer stopped. |
| 6717 | */ |
| 6718 | while ((ahc_le32toh(sg->len) & AHC_DMA_LAST_SEG) == 0) { |
| 6719 | sg++; |
| 6720 | resid += ahc_le32toh(sg->len) & AHC_SG_LEN_MASK; |
| 6721 | } |
| 6722 | } |
| 6723 | if ((scb->flags & SCB_SENSE) == 0) |
| 6724 | ahc_set_residual(scb, resid); |
| 6725 | else |
| 6726 | ahc_set_sense_residual(scb, resid); |
| 6727 | |
| 6728 | #ifdef AHC_DEBUG |
| 6729 | if ((ahc_debug & AHC_SHOW_MISC) != 0) { |
| 6730 | ahc_print_path(ahc, scb); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 6731 | printk("Handled %sResidual of %d bytes\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6732 | (scb->flags & SCB_SENSE) ? "Sense " : "", resid); |
| 6733 | } |
| 6734 | #endif |
| 6735 | } |
| 6736 | |
| 6737 | /******************************* Target Mode **********************************/ |
| 6738 | #ifdef AHC_TARGET_MODE |
| 6739 | /* |
| 6740 | * Add a target mode event to this lun's queue |
| 6741 | */ |
| 6742 | static void |
| 6743 | ahc_queue_lstate_event(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate, |
| 6744 | u_int initiator_id, u_int event_type, u_int event_arg) |
| 6745 | { |
| 6746 | struct ahc_tmode_event *event; |
| 6747 | int pending; |
| 6748 | |
| 6749 | xpt_freeze_devq(lstate->path, /*count*/1); |
| 6750 | if (lstate->event_w_idx >= lstate->event_r_idx) |
| 6751 | pending = lstate->event_w_idx - lstate->event_r_idx; |
| 6752 | else |
| 6753 | pending = AHC_TMODE_EVENT_BUFFER_SIZE + 1 |
| 6754 | - (lstate->event_r_idx - lstate->event_w_idx); |
| 6755 | |
| 6756 | if (event_type == EVENT_TYPE_BUS_RESET |
| 6757 | || event_type == MSG_BUS_DEV_RESET) { |
| 6758 | /* |
| 6759 | * Any earlier events are irrelevant, so reset our buffer. |
| 6760 | * This has the effect of allowing us to deal with reset |
| 6761 | * floods (an external device holding down the reset line) |
| 6762 | * without losing the event that is really interesting. |
| 6763 | */ |
| 6764 | lstate->event_r_idx = 0; |
| 6765 | lstate->event_w_idx = 0; |
| 6766 | xpt_release_devq(lstate->path, pending, /*runqueue*/FALSE); |
| 6767 | } |
| 6768 | |
| 6769 | if (pending == AHC_TMODE_EVENT_BUFFER_SIZE) { |
| 6770 | xpt_print_path(lstate->path); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 6771 | printk("immediate event %x:%x lost\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6772 | lstate->event_buffer[lstate->event_r_idx].event_type, |
| 6773 | lstate->event_buffer[lstate->event_r_idx].event_arg); |
| 6774 | lstate->event_r_idx++; |
| 6775 | if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE) |
| 6776 | lstate->event_r_idx = 0; |
| 6777 | xpt_release_devq(lstate->path, /*count*/1, /*runqueue*/FALSE); |
| 6778 | } |
| 6779 | |
| 6780 | event = &lstate->event_buffer[lstate->event_w_idx]; |
| 6781 | event->initiator_id = initiator_id; |
| 6782 | event->event_type = event_type; |
| 6783 | event->event_arg = event_arg; |
| 6784 | lstate->event_w_idx++; |
| 6785 | if (lstate->event_w_idx == AHC_TMODE_EVENT_BUFFER_SIZE) |
| 6786 | lstate->event_w_idx = 0; |
| 6787 | } |
| 6788 | |
| 6789 | /* |
| 6790 | * Send any target mode events queued up waiting |
| 6791 | * for immediate notify resources. |
| 6792 | */ |
| 6793 | void |
| 6794 | ahc_send_lstate_events(struct ahc_softc *ahc, struct ahc_tmode_lstate *lstate) |
| 6795 | { |
| 6796 | struct ccb_hdr *ccbh; |
| 6797 | struct ccb_immed_notify *inot; |
| 6798 | |
| 6799 | while (lstate->event_r_idx != lstate->event_w_idx |
| 6800 | && (ccbh = SLIST_FIRST(&lstate->immed_notifies)) != NULL) { |
| 6801 | struct ahc_tmode_event *event; |
| 6802 | |
| 6803 | event = &lstate->event_buffer[lstate->event_r_idx]; |
| 6804 | SLIST_REMOVE_HEAD(&lstate->immed_notifies, sim_links.sle); |
| 6805 | inot = (struct ccb_immed_notify *)ccbh; |
| 6806 | switch (event->event_type) { |
| 6807 | case EVENT_TYPE_BUS_RESET: |
| 6808 | ccbh->status = CAM_SCSI_BUS_RESET|CAM_DEV_QFRZN; |
| 6809 | break; |
| 6810 | default: |
| 6811 | ccbh->status = CAM_MESSAGE_RECV|CAM_DEV_QFRZN; |
| 6812 | inot->message_args[0] = event->event_type; |
| 6813 | inot->message_args[1] = event->event_arg; |
| 6814 | break; |
| 6815 | } |
| 6816 | inot->initiator_id = event->initiator_id; |
| 6817 | inot->sense_len = 0; |
| 6818 | xpt_done((union ccb *)inot); |
| 6819 | lstate->event_r_idx++; |
| 6820 | if (lstate->event_r_idx == AHC_TMODE_EVENT_BUFFER_SIZE) |
| 6821 | lstate->event_r_idx = 0; |
| 6822 | } |
| 6823 | } |
| 6824 | #endif |
| 6825 | |
| 6826 | /******************** Sequencer Program Patching/Download *********************/ |
| 6827 | |
| 6828 | #ifdef AHC_DUMP_SEQ |
| 6829 | void |
| 6830 | ahc_dumpseq(struct ahc_softc* ahc) |
| 6831 | { |
| 6832 | int i; |
| 6833 | |
| 6834 | ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM); |
| 6835 | ahc_outb(ahc, SEQADDR0, 0); |
| 6836 | ahc_outb(ahc, SEQADDR1, 0); |
| 6837 | for (i = 0; i < ahc->instruction_ram_size; i++) { |
| 6838 | uint8_t ins_bytes[4]; |
| 6839 | |
| 6840 | ahc_insb(ahc, SEQRAM, ins_bytes, 4); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 6841 | printk("0x%08x\n", ins_bytes[0] << 24 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6842 | | ins_bytes[1] << 16 |
| 6843 | | ins_bytes[2] << 8 |
| 6844 | | ins_bytes[3]); |
| 6845 | } |
| 6846 | } |
| 6847 | #endif |
| 6848 | |
| 6849 | static int |
| 6850 | ahc_loadseq(struct ahc_softc *ahc) |
| 6851 | { |
| 6852 | struct cs cs_table[num_critical_sections]; |
| 6853 | u_int begin_set[num_critical_sections]; |
| 6854 | u_int end_set[num_critical_sections]; |
Denys Vlasenko | 980b306 | 2008-04-25 04:36:01 +0200 | [diff] [blame] | 6855 | const struct patch *cur_patch; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6856 | u_int cs_count; |
| 6857 | u_int cur_cs; |
| 6858 | u_int i; |
| 6859 | u_int skip_addr; |
| 6860 | u_int sg_prefetch_cnt; |
| 6861 | int downloaded; |
| 6862 | uint8_t download_consts[7]; |
| 6863 | |
| 6864 | /* |
| 6865 | * Start out with 0 critical sections |
| 6866 | * that apply to this firmware load. |
| 6867 | */ |
| 6868 | cs_count = 0; |
| 6869 | cur_cs = 0; |
| 6870 | memset(begin_set, 0, sizeof(begin_set)); |
| 6871 | memset(end_set, 0, sizeof(end_set)); |
| 6872 | |
| 6873 | /* Setup downloadable constant table */ |
| 6874 | download_consts[QOUTFIFO_OFFSET] = 0; |
| 6875 | if (ahc->targetcmds != NULL) |
| 6876 | download_consts[QOUTFIFO_OFFSET] += 32; |
| 6877 | download_consts[QINFIFO_OFFSET] = download_consts[QOUTFIFO_OFFSET] + 1; |
| 6878 | download_consts[CACHESIZE_MASK] = ahc->pci_cachesize - 1; |
| 6879 | download_consts[INVERTED_CACHESIZE_MASK] = ~(ahc->pci_cachesize - 1); |
| 6880 | sg_prefetch_cnt = ahc->pci_cachesize; |
| 6881 | if (sg_prefetch_cnt < (2 * sizeof(struct ahc_dma_seg))) |
| 6882 | sg_prefetch_cnt = 2 * sizeof(struct ahc_dma_seg); |
| 6883 | download_consts[SG_PREFETCH_CNT] = sg_prefetch_cnt; |
| 6884 | download_consts[SG_PREFETCH_ALIGN_MASK] = ~(sg_prefetch_cnt - 1); |
| 6885 | download_consts[SG_PREFETCH_ADDR_MASK] = (sg_prefetch_cnt - 1); |
| 6886 | |
| 6887 | cur_patch = patches; |
| 6888 | downloaded = 0; |
| 6889 | skip_addr = 0; |
| 6890 | ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE|LOADRAM); |
| 6891 | ahc_outb(ahc, SEQADDR0, 0); |
| 6892 | ahc_outb(ahc, SEQADDR1, 0); |
| 6893 | |
| 6894 | for (i = 0; i < sizeof(seqprog)/4; i++) { |
| 6895 | if (ahc_check_patch(ahc, &cur_patch, i, &skip_addr) == 0) { |
| 6896 | /* |
| 6897 | * Don't download this instruction as it |
| 6898 | * is in a patch that was removed. |
| 6899 | */ |
| 6900 | continue; |
| 6901 | } |
| 6902 | |
| 6903 | if (downloaded == ahc->instruction_ram_size) { |
| 6904 | /* |
| 6905 | * We're about to exceed the instruction |
| 6906 | * storage capacity for this chip. Fail |
| 6907 | * the load. |
| 6908 | */ |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 6909 | printk("\n%s: Program too large for instruction memory " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6910 | "size of %d!\n", ahc_name(ahc), |
| 6911 | ahc->instruction_ram_size); |
| 6912 | return (ENOMEM); |
| 6913 | } |
| 6914 | |
| 6915 | /* |
| 6916 | * Move through the CS table until we find a CS |
| 6917 | * that might apply to this instruction. |
| 6918 | */ |
| 6919 | for (; cur_cs < num_critical_sections; cur_cs++) { |
| 6920 | if (critical_sections[cur_cs].end <= i) { |
| 6921 | if (begin_set[cs_count] == TRUE |
| 6922 | && end_set[cs_count] == FALSE) { |
| 6923 | cs_table[cs_count].end = downloaded; |
| 6924 | end_set[cs_count] = TRUE; |
| 6925 | cs_count++; |
| 6926 | } |
| 6927 | continue; |
| 6928 | } |
| 6929 | if (critical_sections[cur_cs].begin <= i |
| 6930 | && begin_set[cs_count] == FALSE) { |
| 6931 | cs_table[cs_count].begin = downloaded; |
| 6932 | begin_set[cs_count] = TRUE; |
| 6933 | } |
| 6934 | break; |
| 6935 | } |
| 6936 | ahc_download_instr(ahc, i, download_consts); |
| 6937 | downloaded++; |
| 6938 | } |
| 6939 | |
| 6940 | ahc->num_critical_sections = cs_count; |
| 6941 | if (cs_count != 0) { |
| 6942 | |
| 6943 | cs_count *= sizeof(struct cs); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 6944 | ahc->critical_sections = kmalloc(cs_count, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6945 | if (ahc->critical_sections == NULL) |
| 6946 | panic("ahc_loadseq: Could not malloc"); |
| 6947 | memcpy(ahc->critical_sections, cs_table, cs_count); |
| 6948 | } |
| 6949 | ahc_outb(ahc, SEQCTL, PERRORDIS|FAILDIS|FASTMODE); |
| 6950 | |
| 6951 | if (bootverbose) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 6952 | printk(" %d instructions downloaded\n", downloaded); |
| 6953 | printk("%s: Features 0x%x, Bugs 0x%x, Flags 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6954 | ahc_name(ahc), ahc->features, ahc->bugs, ahc->flags); |
| 6955 | } |
| 6956 | return (0); |
| 6957 | } |
| 6958 | |
| 6959 | static int |
Denys Vlasenko | 980b306 | 2008-04-25 04:36:01 +0200 | [diff] [blame] | 6960 | ahc_check_patch(struct ahc_softc *ahc, const struct patch **start_patch, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6961 | u_int start_instr, u_int *skip_addr) |
| 6962 | { |
Denys Vlasenko | 980b306 | 2008-04-25 04:36:01 +0200 | [diff] [blame] | 6963 | const struct patch *cur_patch; |
| 6964 | const struct patch *last_patch; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6965 | u_int num_patches; |
| 6966 | |
Tobias Klauser | 6391a11 | 2006-06-08 22:23:48 -0700 | [diff] [blame] | 6967 | num_patches = ARRAY_SIZE(patches); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6968 | last_patch = &patches[num_patches]; |
| 6969 | cur_patch = *start_patch; |
| 6970 | |
| 6971 | while (cur_patch < last_patch && start_instr == cur_patch->begin) { |
| 6972 | |
| 6973 | if (cur_patch->patch_func(ahc) == 0) { |
| 6974 | |
| 6975 | /* Start rejecting code */ |
| 6976 | *skip_addr = start_instr + cur_patch->skip_instr; |
| 6977 | cur_patch += cur_patch->skip_patch; |
| 6978 | } else { |
| 6979 | /* Accepted this patch. Advance to the next |
| 6980 | * one and wait for our intruction pointer to |
| 6981 | * hit this point. |
| 6982 | */ |
| 6983 | cur_patch++; |
| 6984 | } |
| 6985 | } |
| 6986 | |
| 6987 | *start_patch = cur_patch; |
| 6988 | if (start_instr < *skip_addr) |
| 6989 | /* Still skipping */ |
| 6990 | return (0); |
| 6991 | |
| 6992 | return (1); |
| 6993 | } |
| 6994 | |
| 6995 | static void |
| 6996 | ahc_download_instr(struct ahc_softc *ahc, u_int instrptr, uint8_t *dconsts) |
| 6997 | { |
| 6998 | union ins_formats instr; |
| 6999 | struct ins_format1 *fmt1_ins; |
| 7000 | struct ins_format3 *fmt3_ins; |
| 7001 | u_int opcode; |
| 7002 | |
| 7003 | /* |
| 7004 | * The firmware is always compiled into a little endian format. |
| 7005 | */ |
| 7006 | instr.integer = ahc_le32toh(*(uint32_t*)&seqprog[instrptr * 4]); |
| 7007 | |
| 7008 | fmt1_ins = &instr.format1; |
| 7009 | fmt3_ins = NULL; |
| 7010 | |
| 7011 | /* Pull the opcode */ |
| 7012 | opcode = instr.format1.opcode; |
| 7013 | switch (opcode) { |
| 7014 | case AIC_OP_JMP: |
| 7015 | case AIC_OP_JC: |
| 7016 | case AIC_OP_JNC: |
| 7017 | case AIC_OP_CALL: |
| 7018 | case AIC_OP_JNE: |
| 7019 | case AIC_OP_JNZ: |
| 7020 | case AIC_OP_JE: |
| 7021 | case AIC_OP_JZ: |
| 7022 | { |
Denys Vlasenko | 980b306 | 2008-04-25 04:36:01 +0200 | [diff] [blame] | 7023 | const struct patch *cur_patch; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7024 | int address_offset; |
| 7025 | u_int address; |
| 7026 | u_int skip_addr; |
| 7027 | u_int i; |
| 7028 | |
| 7029 | fmt3_ins = &instr.format3; |
| 7030 | address_offset = 0; |
| 7031 | address = fmt3_ins->address; |
| 7032 | cur_patch = patches; |
| 7033 | skip_addr = 0; |
| 7034 | |
| 7035 | for (i = 0; i < address;) { |
| 7036 | |
| 7037 | ahc_check_patch(ahc, &cur_patch, i, &skip_addr); |
| 7038 | |
| 7039 | if (skip_addr > i) { |
| 7040 | int end_addr; |
| 7041 | |
Amol Lad | 6d07cb7 | 2006-10-20 14:48:40 -0700 | [diff] [blame] | 7042 | end_addr = min(address, skip_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7043 | address_offset += end_addr - i; |
| 7044 | i = skip_addr; |
| 7045 | } else { |
| 7046 | i++; |
| 7047 | } |
| 7048 | } |
| 7049 | address -= address_offset; |
| 7050 | fmt3_ins->address = address; |
| 7051 | /* FALLTHROUGH */ |
| 7052 | } |
| 7053 | case AIC_OP_OR: |
| 7054 | case AIC_OP_AND: |
| 7055 | case AIC_OP_XOR: |
| 7056 | case AIC_OP_ADD: |
| 7057 | case AIC_OP_ADC: |
| 7058 | case AIC_OP_BMOV: |
| 7059 | if (fmt1_ins->parity != 0) { |
| 7060 | fmt1_ins->immediate = dconsts[fmt1_ins->immediate]; |
| 7061 | } |
| 7062 | fmt1_ins->parity = 0; |
| 7063 | if ((ahc->features & AHC_CMD_CHAN) == 0 |
| 7064 | && opcode == AIC_OP_BMOV) { |
| 7065 | /* |
| 7066 | * Block move was added at the same time |
| 7067 | * as the command channel. Verify that |
| 7068 | * this is only a move of a single element |
| 7069 | * and convert the BMOV to a MOV |
| 7070 | * (AND with an immediate of FF). |
| 7071 | */ |
| 7072 | if (fmt1_ins->immediate != 1) |
| 7073 | panic("%s: BMOV not supported\n", |
| 7074 | ahc_name(ahc)); |
| 7075 | fmt1_ins->opcode = AIC_OP_AND; |
| 7076 | fmt1_ins->immediate = 0xff; |
| 7077 | } |
| 7078 | /* FALLTHROUGH */ |
| 7079 | case AIC_OP_ROL: |
| 7080 | if ((ahc->features & AHC_ULTRA2) != 0) { |
| 7081 | int i, count; |
| 7082 | |
| 7083 | /* Calculate odd parity for the instruction */ |
| 7084 | for (i = 0, count = 0; i < 31; i++) { |
| 7085 | uint32_t mask; |
| 7086 | |
| 7087 | mask = 0x01 << i; |
| 7088 | if ((instr.integer & mask) != 0) |
| 7089 | count++; |
| 7090 | } |
| 7091 | if ((count & 0x01) == 0) |
| 7092 | instr.format1.parity = 1; |
| 7093 | } else { |
| 7094 | /* Compress the instruction for older sequencers */ |
| 7095 | if (fmt3_ins != NULL) { |
| 7096 | instr.integer = |
| 7097 | fmt3_ins->immediate |
| 7098 | | (fmt3_ins->source << 8) |
| 7099 | | (fmt3_ins->address << 16) |
| 7100 | | (fmt3_ins->opcode << 25); |
| 7101 | } else { |
| 7102 | instr.integer = |
| 7103 | fmt1_ins->immediate |
| 7104 | | (fmt1_ins->source << 8) |
| 7105 | | (fmt1_ins->destination << 16) |
| 7106 | | (fmt1_ins->ret << 24) |
| 7107 | | (fmt1_ins->opcode << 25); |
| 7108 | } |
| 7109 | } |
| 7110 | /* The sequencer is a little endian cpu */ |
| 7111 | instr.integer = ahc_htole32(instr.integer); |
| 7112 | ahc_outsb(ahc, SEQRAM, instr.bytes, 4); |
| 7113 | break; |
| 7114 | default: |
| 7115 | panic("Unknown opcode encountered in seq program"); |
| 7116 | break; |
| 7117 | } |
| 7118 | } |
| 7119 | |
| 7120 | int |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 7121 | ahc_print_register(const ahc_reg_parse_entry_t *table, u_int num_entries, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7122 | const char *name, u_int address, u_int value, |
| 7123 | u_int *cur_column, u_int wrap_point) |
| 7124 | { |
| 7125 | int printed; |
| 7126 | u_int printed_mask; |
| 7127 | |
| 7128 | if (cur_column != NULL && *cur_column >= wrap_point) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7129 | printk("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7130 | *cur_column = 0; |
| 7131 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7132 | printed = printk("%s[0x%x]", name, value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7133 | if (table == NULL) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7134 | printed += printk(" "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7135 | *cur_column += printed; |
| 7136 | return (printed); |
| 7137 | } |
| 7138 | printed_mask = 0; |
| 7139 | while (printed_mask != 0xFF) { |
| 7140 | int entry; |
| 7141 | |
| 7142 | for (entry = 0; entry < num_entries; entry++) { |
| 7143 | if (((value & table[entry].mask) |
| 7144 | != table[entry].value) |
| 7145 | || ((printed_mask & table[entry].mask) |
| 7146 | == table[entry].mask)) |
| 7147 | continue; |
| 7148 | |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7149 | printed += printk("%s%s", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7150 | printed_mask == 0 ? ":(" : "|", |
| 7151 | table[entry].name); |
| 7152 | printed_mask |= table[entry].mask; |
| 7153 | |
| 7154 | break; |
| 7155 | } |
| 7156 | if (entry >= num_entries) |
| 7157 | break; |
| 7158 | } |
| 7159 | if (printed_mask != 0) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7160 | printed += printk(") "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7161 | else |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7162 | printed += printk(" "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7163 | if (cur_column != NULL) |
| 7164 | *cur_column += printed; |
| 7165 | return (printed); |
| 7166 | } |
| 7167 | |
| 7168 | void |
| 7169 | ahc_dump_card_state(struct ahc_softc *ahc) |
| 7170 | { |
| 7171 | struct scb *scb; |
| 7172 | struct scb_tailq *untagged_q; |
| 7173 | u_int cur_col; |
| 7174 | int paused; |
| 7175 | int target; |
| 7176 | int maxtarget; |
| 7177 | int i; |
| 7178 | uint8_t last_phase; |
| 7179 | uint8_t qinpos; |
| 7180 | uint8_t qintail; |
| 7181 | uint8_t qoutpos; |
| 7182 | uint8_t scb_index; |
| 7183 | uint8_t saved_scbptr; |
| 7184 | |
| 7185 | if (ahc_is_paused(ahc)) { |
| 7186 | paused = 1; |
| 7187 | } else { |
| 7188 | paused = 0; |
| 7189 | ahc_pause(ahc); |
| 7190 | } |
| 7191 | |
| 7192 | saved_scbptr = ahc_inb(ahc, SCBPTR); |
| 7193 | last_phase = ahc_inb(ahc, LASTPHASE); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7194 | printk(">>>>>>>>>>>>>>>>>> Dump Card State Begins <<<<<<<<<<<<<<<<<\n" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7195 | "%s: Dumping Card State %s, at SEQADDR 0x%x\n", |
| 7196 | ahc_name(ahc), ahc_lookup_phase_entry(last_phase)->phasemsg, |
| 7197 | ahc_inb(ahc, SEQADDR0) | (ahc_inb(ahc, SEQADDR1) << 8)); |
| 7198 | if (paused) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7199 | printk("Card was paused\n"); |
| 7200 | printk("ACCUM = 0x%x, SINDEX = 0x%x, DINDEX = 0x%x, ARG_2 = 0x%x\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7201 | ahc_inb(ahc, ACCUM), ahc_inb(ahc, SINDEX), ahc_inb(ahc, DINDEX), |
| 7202 | ahc_inb(ahc, ARG_2)); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7203 | printk("HCNT = 0x%x SCBPTR = 0x%x\n", ahc_inb(ahc, HCNT), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7204 | ahc_inb(ahc, SCBPTR)); |
| 7205 | cur_col = 0; |
| 7206 | if ((ahc->features & AHC_DT) != 0) |
| 7207 | ahc_scsiphase_print(ahc_inb(ahc, SCSIPHASE), &cur_col, 50); |
| 7208 | ahc_scsisigi_print(ahc_inb(ahc, SCSISIGI), &cur_col, 50); |
| 7209 | ahc_error_print(ahc_inb(ahc, ERROR), &cur_col, 50); |
| 7210 | ahc_scsibusl_print(ahc_inb(ahc, SCSIBUSL), &cur_col, 50); |
| 7211 | ahc_lastphase_print(ahc_inb(ahc, LASTPHASE), &cur_col, 50); |
| 7212 | ahc_scsiseq_print(ahc_inb(ahc, SCSISEQ), &cur_col, 50); |
| 7213 | ahc_sblkctl_print(ahc_inb(ahc, SBLKCTL), &cur_col, 50); |
| 7214 | ahc_scsirate_print(ahc_inb(ahc, SCSIRATE), &cur_col, 50); |
| 7215 | ahc_seqctl_print(ahc_inb(ahc, SEQCTL), &cur_col, 50); |
| 7216 | ahc_seq_flags_print(ahc_inb(ahc, SEQ_FLAGS), &cur_col, 50); |
| 7217 | ahc_sstat0_print(ahc_inb(ahc, SSTAT0), &cur_col, 50); |
| 7218 | ahc_sstat1_print(ahc_inb(ahc, SSTAT1), &cur_col, 50); |
| 7219 | ahc_sstat2_print(ahc_inb(ahc, SSTAT2), &cur_col, 50); |
| 7220 | ahc_sstat3_print(ahc_inb(ahc, SSTAT3), &cur_col, 50); |
| 7221 | ahc_simode0_print(ahc_inb(ahc, SIMODE0), &cur_col, 50); |
| 7222 | ahc_simode1_print(ahc_inb(ahc, SIMODE1), &cur_col, 50); |
| 7223 | ahc_sxfrctl0_print(ahc_inb(ahc, SXFRCTL0), &cur_col, 50); |
| 7224 | ahc_dfcntrl_print(ahc_inb(ahc, DFCNTRL), &cur_col, 50); |
| 7225 | ahc_dfstatus_print(ahc_inb(ahc, DFSTATUS), &cur_col, 50); |
| 7226 | if (cur_col != 0) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7227 | printk("\n"); |
| 7228 | printk("STACK:"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7229 | for (i = 0; i < STACK_SIZE; i++) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7230 | printk(" 0x%x", ahc_inb(ahc, STACK)|(ahc_inb(ahc, STACK) << 8)); |
| 7231 | printk("\nSCB count = %d\n", ahc->scb_data->numscbs); |
| 7232 | printk("Kernel NEXTQSCB = %d\n", ahc->next_queued_scb->hscb->tag); |
| 7233 | printk("Card NEXTQSCB = %d\n", ahc_inb(ahc, NEXT_QUEUED_SCB)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7234 | /* QINFIFO */ |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7235 | printk("QINFIFO entries: "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7236 | if ((ahc->features & AHC_QUEUE_REGS) != 0) { |
| 7237 | qinpos = ahc_inb(ahc, SNSCB_QOFF); |
| 7238 | ahc_outb(ahc, SNSCB_QOFF, qinpos); |
| 7239 | } else |
| 7240 | qinpos = ahc_inb(ahc, QINPOS); |
| 7241 | qintail = ahc->qinfifonext; |
| 7242 | while (qinpos != qintail) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7243 | printk("%d ", ahc->qinfifo[qinpos]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7244 | qinpos++; |
| 7245 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7246 | printk("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7247 | |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7248 | printk("Waiting Queue entries: "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7249 | scb_index = ahc_inb(ahc, WAITING_SCBH); |
| 7250 | i = 0; |
| 7251 | while (scb_index != SCB_LIST_NULL && i++ < 256) { |
| 7252 | ahc_outb(ahc, SCBPTR, scb_index); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7253 | printk("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7254 | scb_index = ahc_inb(ahc, SCB_NEXT); |
| 7255 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7256 | printk("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7257 | |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7258 | printk("Disconnected Queue entries: "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7259 | scb_index = ahc_inb(ahc, DISCONNECTED_SCBH); |
| 7260 | i = 0; |
| 7261 | while (scb_index != SCB_LIST_NULL && i++ < 256) { |
| 7262 | ahc_outb(ahc, SCBPTR, scb_index); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7263 | printk("%d:%d ", scb_index, ahc_inb(ahc, SCB_TAG)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7264 | scb_index = ahc_inb(ahc, SCB_NEXT); |
| 7265 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7266 | printk("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7267 | |
| 7268 | ahc_sync_qoutfifo(ahc, BUS_DMASYNC_POSTREAD); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7269 | printk("QOUTFIFO entries: "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7270 | qoutpos = ahc->qoutfifonext; |
| 7271 | i = 0; |
| 7272 | while (ahc->qoutfifo[qoutpos] != SCB_LIST_NULL && i++ < 256) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7273 | printk("%d ", ahc->qoutfifo[qoutpos]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7274 | qoutpos++; |
| 7275 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7276 | printk("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7277 | |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7278 | printk("Sequencer Free SCB List: "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7279 | scb_index = ahc_inb(ahc, FREE_SCBH); |
| 7280 | i = 0; |
| 7281 | while (scb_index != SCB_LIST_NULL && i++ < 256) { |
| 7282 | ahc_outb(ahc, SCBPTR, scb_index); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7283 | printk("%d ", scb_index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7284 | scb_index = ahc_inb(ahc, SCB_NEXT); |
| 7285 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7286 | printk("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7287 | |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7288 | printk("Sequencer SCB Info: "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7289 | for (i = 0; i < ahc->scb_data->maxhscbs; i++) { |
| 7290 | ahc_outb(ahc, SCBPTR, i); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7291 | cur_col = printk("\n%3d ", i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7292 | |
| 7293 | ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL), &cur_col, 60); |
| 7294 | ahc_scb_scsiid_print(ahc_inb(ahc, SCB_SCSIID), &cur_col, 60); |
| 7295 | ahc_scb_lun_print(ahc_inb(ahc, SCB_LUN), &cur_col, 60); |
| 7296 | ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60); |
| 7297 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7298 | printk("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7299 | |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7300 | printk("Pending list: "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7301 | i = 0; |
| 7302 | LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) { |
| 7303 | if (i++ > 256) |
| 7304 | break; |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7305 | cur_col = printk("\n%3d ", scb->hscb->tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7306 | ahc_scb_control_print(scb->hscb->control, &cur_col, 60); |
| 7307 | ahc_scb_scsiid_print(scb->hscb->scsiid, &cur_col, 60); |
| 7308 | ahc_scb_lun_print(scb->hscb->lun, &cur_col, 60); |
| 7309 | if ((ahc->flags & AHC_PAGESCBS) == 0) { |
| 7310 | ahc_outb(ahc, SCBPTR, scb->hscb->tag); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7311 | printk("("); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7312 | ahc_scb_control_print(ahc_inb(ahc, SCB_CONTROL), |
| 7313 | &cur_col, 60); |
| 7314 | ahc_scb_tag_print(ahc_inb(ahc, SCB_TAG), &cur_col, 60); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7315 | printk(")"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7316 | } |
| 7317 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7318 | printk("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7319 | |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7320 | printk("Kernel Free SCB list: "); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7321 | i = 0; |
| 7322 | SLIST_FOREACH(scb, &ahc->scb_data->free_scbs, links.sle) { |
| 7323 | if (i++ > 256) |
| 7324 | break; |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7325 | printk("%d ", scb->hscb->tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7326 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7327 | printk("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7328 | |
| 7329 | maxtarget = (ahc->features & (AHC_WIDE|AHC_TWIN)) ? 15 : 7; |
| 7330 | for (target = 0; target <= maxtarget; target++) { |
| 7331 | untagged_q = &ahc->untagged_queues[target]; |
| 7332 | if (TAILQ_FIRST(untagged_q) == NULL) |
| 7333 | continue; |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7334 | printk("Untagged Q(%d): ", target); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7335 | i = 0; |
| 7336 | TAILQ_FOREACH(scb, untagged_q, links.tqe) { |
| 7337 | if (i++ > 256) |
| 7338 | break; |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7339 | printk("%d ", scb->hscb->tag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7340 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7341 | printk("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7342 | } |
| 7343 | |
| 7344 | ahc_platform_dump_card_state(ahc); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7345 | printk("\n<<<<<<<<<<<<<<<<< Dump Card State Ends >>>>>>>>>>>>>>>>>>\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7346 | ahc_outb(ahc, SCBPTR, saved_scbptr); |
| 7347 | if (paused == 0) |
| 7348 | ahc_unpause(ahc); |
| 7349 | } |
| 7350 | |
| 7351 | /************************* Target Mode ****************************************/ |
| 7352 | #ifdef AHC_TARGET_MODE |
| 7353 | cam_status |
| 7354 | ahc_find_tmode_devs(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb, |
| 7355 | struct ahc_tmode_tstate **tstate, |
| 7356 | struct ahc_tmode_lstate **lstate, |
| 7357 | int notfound_failure) |
| 7358 | { |
| 7359 | |
| 7360 | if ((ahc->features & AHC_TARGETMODE) == 0) |
| 7361 | return (CAM_REQ_INVALID); |
| 7362 | |
| 7363 | /* |
| 7364 | * Handle the 'black hole' device that sucks up |
| 7365 | * requests to unattached luns on enabled targets. |
| 7366 | */ |
| 7367 | if (ccb->ccb_h.target_id == CAM_TARGET_WILDCARD |
| 7368 | && ccb->ccb_h.target_lun == CAM_LUN_WILDCARD) { |
| 7369 | *tstate = NULL; |
| 7370 | *lstate = ahc->black_hole; |
| 7371 | } else { |
| 7372 | u_int max_id; |
| 7373 | |
Hannes Reinecke | 2b89dad | 2006-05-23 10:29:28 +0200 | [diff] [blame] | 7374 | max_id = (ahc->features & AHC_WIDE) ? 16 : 8; |
| 7375 | if (ccb->ccb_h.target_id >= max_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7376 | return (CAM_TID_INVALID); |
| 7377 | |
| 7378 | if (ccb->ccb_h.target_lun >= AHC_NUM_LUNS) |
| 7379 | return (CAM_LUN_INVALID); |
| 7380 | |
| 7381 | *tstate = ahc->enabled_targets[ccb->ccb_h.target_id]; |
| 7382 | *lstate = NULL; |
| 7383 | if (*tstate != NULL) |
| 7384 | *lstate = |
| 7385 | (*tstate)->enabled_luns[ccb->ccb_h.target_lun]; |
| 7386 | } |
| 7387 | |
| 7388 | if (notfound_failure != 0 && *lstate == NULL) |
| 7389 | return (CAM_PATH_INVALID); |
| 7390 | |
| 7391 | return (CAM_REQ_CMP); |
| 7392 | } |
| 7393 | |
| 7394 | void |
| 7395 | ahc_handle_en_lun(struct ahc_softc *ahc, struct cam_sim *sim, union ccb *ccb) |
| 7396 | { |
| 7397 | struct ahc_tmode_tstate *tstate; |
| 7398 | struct ahc_tmode_lstate *lstate; |
| 7399 | struct ccb_en_lun *cel; |
| 7400 | cam_status status; |
| 7401 | u_long s; |
| 7402 | u_int target; |
| 7403 | u_int lun; |
| 7404 | u_int target_mask; |
| 7405 | u_int our_id; |
| 7406 | int error; |
| 7407 | char channel; |
| 7408 | |
| 7409 | status = ahc_find_tmode_devs(ahc, sim, ccb, &tstate, &lstate, |
| 7410 | /*notfound_failure*/FALSE); |
| 7411 | |
| 7412 | if (status != CAM_REQ_CMP) { |
| 7413 | ccb->ccb_h.status = status; |
| 7414 | return; |
| 7415 | } |
| 7416 | |
| 7417 | if (cam_sim_bus(sim) == 0) |
| 7418 | our_id = ahc->our_id; |
| 7419 | else |
| 7420 | our_id = ahc->our_id_b; |
| 7421 | |
| 7422 | if (ccb->ccb_h.target_id != our_id) { |
| 7423 | /* |
| 7424 | * our_id represents our initiator ID, or |
| 7425 | * the ID of the first target to have an |
| 7426 | * enabled lun in target mode. There are |
| 7427 | * two cases that may preclude enabling a |
| 7428 | * target id other than our_id. |
| 7429 | * |
| 7430 | * o our_id is for an active initiator role. |
| 7431 | * Since the hardware does not support |
| 7432 | * reselections to the initiator role at |
| 7433 | * anything other than our_id, and our_id |
| 7434 | * is used by the hardware to indicate the |
| 7435 | * ID to use for both select-out and |
| 7436 | * reselect-out operations, the only target |
| 7437 | * ID we can support in this mode is our_id. |
| 7438 | * |
| 7439 | * o The MULTARGID feature is not available and |
| 7440 | * a previous target mode ID has been enabled. |
| 7441 | */ |
| 7442 | if ((ahc->features & AHC_MULTIROLE) != 0) { |
| 7443 | |
| 7444 | if ((ahc->features & AHC_MULTI_TID) != 0 |
| 7445 | && (ahc->flags & AHC_INITIATORROLE) != 0) { |
| 7446 | /* |
| 7447 | * Only allow additional targets if |
| 7448 | * the initiator role is disabled. |
| 7449 | * The hardware cannot handle a re-select-in |
| 7450 | * on the initiator id during a re-select-out |
| 7451 | * on a different target id. |
| 7452 | */ |
| 7453 | status = CAM_TID_INVALID; |
| 7454 | } else if ((ahc->flags & AHC_INITIATORROLE) != 0 |
| 7455 | || ahc->enabled_luns > 0) { |
| 7456 | /* |
| 7457 | * Only allow our target id to change |
| 7458 | * if the initiator role is not configured |
| 7459 | * and there are no enabled luns which |
| 7460 | * are attached to the currently registered |
| 7461 | * scsi id. |
| 7462 | */ |
| 7463 | status = CAM_TID_INVALID; |
| 7464 | } |
| 7465 | } else if ((ahc->features & AHC_MULTI_TID) == 0 |
| 7466 | && ahc->enabled_luns > 0) { |
| 7467 | |
| 7468 | status = CAM_TID_INVALID; |
| 7469 | } |
| 7470 | } |
| 7471 | |
| 7472 | if (status != CAM_REQ_CMP) { |
| 7473 | ccb->ccb_h.status = status; |
| 7474 | return; |
| 7475 | } |
| 7476 | |
| 7477 | /* |
| 7478 | * We now have an id that is valid. |
| 7479 | * If we aren't in target mode, switch modes. |
| 7480 | */ |
| 7481 | if ((ahc->flags & AHC_TARGETROLE) == 0 |
| 7482 | && ccb->ccb_h.target_id != CAM_TARGET_WILDCARD) { |
| 7483 | u_long s; |
| 7484 | ahc_flag saved_flags; |
| 7485 | |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7486 | printk("Configuring Target Mode\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7487 | ahc_lock(ahc, &s); |
| 7488 | if (LIST_FIRST(&ahc->pending_scbs) != NULL) { |
| 7489 | ccb->ccb_h.status = CAM_BUSY; |
| 7490 | ahc_unlock(ahc, &s); |
| 7491 | return; |
| 7492 | } |
| 7493 | saved_flags = ahc->flags; |
| 7494 | ahc->flags |= AHC_TARGETROLE; |
| 7495 | if ((ahc->features & AHC_MULTIROLE) == 0) |
| 7496 | ahc->flags &= ~AHC_INITIATORROLE; |
| 7497 | ahc_pause(ahc); |
| 7498 | error = ahc_loadseq(ahc); |
| 7499 | if (error != 0) { |
| 7500 | /* |
| 7501 | * Restore original configuration and notify |
| 7502 | * the caller that we cannot support target mode. |
| 7503 | * Since the adapter started out in this |
| 7504 | * configuration, the firmware load will succeed, |
| 7505 | * so there is no point in checking ahc_loadseq's |
| 7506 | * return value. |
| 7507 | */ |
| 7508 | ahc->flags = saved_flags; |
| 7509 | (void)ahc_loadseq(ahc); |
| 7510 | ahc_restart(ahc); |
| 7511 | ahc_unlock(ahc, &s); |
| 7512 | ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; |
| 7513 | return; |
| 7514 | } |
| 7515 | ahc_restart(ahc); |
| 7516 | ahc_unlock(ahc, &s); |
| 7517 | } |
| 7518 | cel = &ccb->cel; |
| 7519 | target = ccb->ccb_h.target_id; |
| 7520 | lun = ccb->ccb_h.target_lun; |
| 7521 | channel = SIM_CHANNEL(ahc, sim); |
| 7522 | target_mask = 0x01 << target; |
| 7523 | if (channel == 'B') |
| 7524 | target_mask <<= 8; |
| 7525 | |
| 7526 | if (cel->enable != 0) { |
| 7527 | u_int scsiseq; |
| 7528 | |
| 7529 | /* Are we already enabled?? */ |
| 7530 | if (lstate != NULL) { |
| 7531 | xpt_print_path(ccb->ccb_h.path); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7532 | printk("Lun already enabled\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7533 | ccb->ccb_h.status = CAM_LUN_ALRDY_ENA; |
| 7534 | return; |
| 7535 | } |
| 7536 | |
| 7537 | if (cel->grp6_len != 0 |
| 7538 | || cel->grp7_len != 0) { |
| 7539 | /* |
| 7540 | * Don't (yet?) support vendor |
| 7541 | * specific commands. |
| 7542 | */ |
| 7543 | ccb->ccb_h.status = CAM_REQ_INVALID; |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7544 | printk("Non-zero Group Codes\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7545 | return; |
| 7546 | } |
| 7547 | |
| 7548 | /* |
| 7549 | * Seems to be okay. |
| 7550 | * Setup our data structures. |
| 7551 | */ |
| 7552 | if (target != CAM_TARGET_WILDCARD && tstate == NULL) { |
| 7553 | tstate = ahc_alloc_tstate(ahc, target, channel); |
| 7554 | if (tstate == NULL) { |
| 7555 | xpt_print_path(ccb->ccb_h.path); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7556 | printk("Couldn't allocate tstate\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7557 | ccb->ccb_h.status = CAM_RESRC_UNAVAIL; |
| 7558 | return; |
| 7559 | } |
| 7560 | } |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7561 | lstate = kmalloc(sizeof(*lstate), GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7562 | if (lstate == NULL) { |
| 7563 | xpt_print_path(ccb->ccb_h.path); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7564 | printk("Couldn't allocate lstate\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7565 | ccb->ccb_h.status = CAM_RESRC_UNAVAIL; |
| 7566 | return; |
| 7567 | } |
| 7568 | memset(lstate, 0, sizeof(*lstate)); |
| 7569 | status = xpt_create_path(&lstate->path, /*periph*/NULL, |
| 7570 | xpt_path_path_id(ccb->ccb_h.path), |
| 7571 | xpt_path_target_id(ccb->ccb_h.path), |
| 7572 | xpt_path_lun_id(ccb->ccb_h.path)); |
| 7573 | if (status != CAM_REQ_CMP) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7574 | kfree(lstate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7575 | xpt_print_path(ccb->ccb_h.path); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7576 | printk("Couldn't allocate path\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7577 | ccb->ccb_h.status = CAM_RESRC_UNAVAIL; |
| 7578 | return; |
| 7579 | } |
| 7580 | SLIST_INIT(&lstate->accept_tios); |
| 7581 | SLIST_INIT(&lstate->immed_notifies); |
| 7582 | ahc_lock(ahc, &s); |
| 7583 | ahc_pause(ahc); |
| 7584 | if (target != CAM_TARGET_WILDCARD) { |
| 7585 | tstate->enabled_luns[lun] = lstate; |
| 7586 | ahc->enabled_luns++; |
| 7587 | |
| 7588 | if ((ahc->features & AHC_MULTI_TID) != 0) { |
| 7589 | u_int targid_mask; |
| 7590 | |
| 7591 | targid_mask = ahc_inb(ahc, TARGID) |
| 7592 | | (ahc_inb(ahc, TARGID + 1) << 8); |
| 7593 | |
| 7594 | targid_mask |= target_mask; |
| 7595 | ahc_outb(ahc, TARGID, targid_mask); |
| 7596 | ahc_outb(ahc, TARGID+1, (targid_mask >> 8)); |
| 7597 | |
| 7598 | ahc_update_scsiid(ahc, targid_mask); |
| 7599 | } else { |
| 7600 | u_int our_id; |
| 7601 | char channel; |
| 7602 | |
| 7603 | channel = SIM_CHANNEL(ahc, sim); |
| 7604 | our_id = SIM_SCSI_ID(ahc, sim); |
| 7605 | |
| 7606 | /* |
| 7607 | * This can only happen if selections |
| 7608 | * are not enabled |
| 7609 | */ |
| 7610 | if (target != our_id) { |
| 7611 | u_int sblkctl; |
| 7612 | char cur_channel; |
| 7613 | int swap; |
| 7614 | |
| 7615 | sblkctl = ahc_inb(ahc, SBLKCTL); |
| 7616 | cur_channel = (sblkctl & SELBUSB) |
| 7617 | ? 'B' : 'A'; |
| 7618 | if ((ahc->features & AHC_TWIN) == 0) |
| 7619 | cur_channel = 'A'; |
| 7620 | swap = cur_channel != channel; |
| 7621 | if (channel == 'A') |
| 7622 | ahc->our_id = target; |
| 7623 | else |
| 7624 | ahc->our_id_b = target; |
| 7625 | |
| 7626 | if (swap) |
| 7627 | ahc_outb(ahc, SBLKCTL, |
| 7628 | sblkctl ^ SELBUSB); |
| 7629 | |
| 7630 | ahc_outb(ahc, SCSIID, target); |
| 7631 | |
| 7632 | if (swap) |
| 7633 | ahc_outb(ahc, SBLKCTL, sblkctl); |
| 7634 | } |
| 7635 | } |
| 7636 | } else |
| 7637 | ahc->black_hole = lstate; |
| 7638 | /* Allow select-in operations */ |
| 7639 | if (ahc->black_hole != NULL && ahc->enabled_luns > 0) { |
| 7640 | scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE); |
| 7641 | scsiseq |= ENSELI; |
| 7642 | ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq); |
| 7643 | scsiseq = ahc_inb(ahc, SCSISEQ); |
| 7644 | scsiseq |= ENSELI; |
| 7645 | ahc_outb(ahc, SCSISEQ, scsiseq); |
| 7646 | } |
| 7647 | ahc_unpause(ahc); |
| 7648 | ahc_unlock(ahc, &s); |
| 7649 | ccb->ccb_h.status = CAM_REQ_CMP; |
| 7650 | xpt_print_path(ccb->ccb_h.path); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7651 | printk("Lun now enabled for target mode\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7652 | } else { |
| 7653 | struct scb *scb; |
| 7654 | int i, empty; |
| 7655 | |
| 7656 | if (lstate == NULL) { |
| 7657 | ccb->ccb_h.status = CAM_LUN_INVALID; |
| 7658 | return; |
| 7659 | } |
| 7660 | |
| 7661 | ahc_lock(ahc, &s); |
| 7662 | |
| 7663 | ccb->ccb_h.status = CAM_REQ_CMP; |
| 7664 | LIST_FOREACH(scb, &ahc->pending_scbs, pending_links) { |
| 7665 | struct ccb_hdr *ccbh; |
| 7666 | |
| 7667 | ccbh = &scb->io_ctx->ccb_h; |
| 7668 | if (ccbh->func_code == XPT_CONT_TARGET_IO |
| 7669 | && !xpt_path_comp(ccbh->path, ccb->ccb_h.path)){ |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7670 | printk("CTIO pending\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7671 | ccb->ccb_h.status = CAM_REQ_INVALID; |
| 7672 | ahc_unlock(ahc, &s); |
| 7673 | return; |
| 7674 | } |
| 7675 | } |
| 7676 | |
| 7677 | if (SLIST_FIRST(&lstate->accept_tios) != NULL) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7678 | printk("ATIOs pending\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7679 | ccb->ccb_h.status = CAM_REQ_INVALID; |
| 7680 | } |
| 7681 | |
| 7682 | if (SLIST_FIRST(&lstate->immed_notifies) != NULL) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7683 | printk("INOTs pending\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7684 | ccb->ccb_h.status = CAM_REQ_INVALID; |
| 7685 | } |
| 7686 | |
| 7687 | if (ccb->ccb_h.status != CAM_REQ_CMP) { |
| 7688 | ahc_unlock(ahc, &s); |
| 7689 | return; |
| 7690 | } |
| 7691 | |
| 7692 | xpt_print_path(ccb->ccb_h.path); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7693 | printk("Target mode disabled\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7694 | xpt_free_path(lstate->path); |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7695 | kfree(lstate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7696 | |
| 7697 | ahc_pause(ahc); |
| 7698 | /* Can we clean up the target too? */ |
| 7699 | if (target != CAM_TARGET_WILDCARD) { |
| 7700 | tstate->enabled_luns[lun] = NULL; |
| 7701 | ahc->enabled_luns--; |
| 7702 | for (empty = 1, i = 0; i < 8; i++) |
| 7703 | if (tstate->enabled_luns[i] != NULL) { |
| 7704 | empty = 0; |
| 7705 | break; |
| 7706 | } |
| 7707 | |
| 7708 | if (empty) { |
| 7709 | ahc_free_tstate(ahc, target, channel, |
| 7710 | /*force*/FALSE); |
| 7711 | if (ahc->features & AHC_MULTI_TID) { |
| 7712 | u_int targid_mask; |
| 7713 | |
| 7714 | targid_mask = ahc_inb(ahc, TARGID) |
| 7715 | | (ahc_inb(ahc, TARGID + 1) |
| 7716 | << 8); |
| 7717 | |
| 7718 | targid_mask &= ~target_mask; |
| 7719 | ahc_outb(ahc, TARGID, targid_mask); |
| 7720 | ahc_outb(ahc, TARGID+1, |
| 7721 | (targid_mask >> 8)); |
| 7722 | ahc_update_scsiid(ahc, targid_mask); |
| 7723 | } |
| 7724 | } |
| 7725 | } else { |
| 7726 | |
| 7727 | ahc->black_hole = NULL; |
| 7728 | |
| 7729 | /* |
| 7730 | * We can't allow selections without |
| 7731 | * our black hole device. |
| 7732 | */ |
| 7733 | empty = TRUE; |
| 7734 | } |
| 7735 | if (ahc->enabled_luns == 0) { |
| 7736 | /* Disallow select-in */ |
| 7737 | u_int scsiseq; |
| 7738 | |
| 7739 | scsiseq = ahc_inb(ahc, SCSISEQ_TEMPLATE); |
| 7740 | scsiseq &= ~ENSELI; |
| 7741 | ahc_outb(ahc, SCSISEQ_TEMPLATE, scsiseq); |
| 7742 | scsiseq = ahc_inb(ahc, SCSISEQ); |
| 7743 | scsiseq &= ~ENSELI; |
| 7744 | ahc_outb(ahc, SCSISEQ, scsiseq); |
| 7745 | |
| 7746 | if ((ahc->features & AHC_MULTIROLE) == 0) { |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7747 | printk("Configuring Initiator Mode\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7748 | ahc->flags &= ~AHC_TARGETROLE; |
| 7749 | ahc->flags |= AHC_INITIATORROLE; |
| 7750 | /* |
| 7751 | * Returning to a configuration that |
| 7752 | * fit previously will always succeed. |
| 7753 | */ |
| 7754 | (void)ahc_loadseq(ahc); |
| 7755 | ahc_restart(ahc); |
| 7756 | /* |
| 7757 | * Unpaused. The extra unpause |
| 7758 | * that follows is harmless. |
| 7759 | */ |
| 7760 | } |
| 7761 | } |
| 7762 | ahc_unpause(ahc); |
| 7763 | ahc_unlock(ahc, &s); |
| 7764 | } |
| 7765 | } |
| 7766 | |
| 7767 | static void |
| 7768 | ahc_update_scsiid(struct ahc_softc *ahc, u_int targid_mask) |
| 7769 | { |
| 7770 | u_int scsiid_mask; |
| 7771 | u_int scsiid; |
| 7772 | |
| 7773 | if ((ahc->features & AHC_MULTI_TID) == 0) |
| 7774 | panic("ahc_update_scsiid called on non-multitid unit\n"); |
| 7775 | |
| 7776 | /* |
| 7777 | * Since we will rely on the TARGID mask |
| 7778 | * for selection enables, ensure that OID |
| 7779 | * in SCSIID is not set to some other ID |
| 7780 | * that we don't want to allow selections on. |
| 7781 | */ |
| 7782 | if ((ahc->features & AHC_ULTRA2) != 0) |
| 7783 | scsiid = ahc_inb(ahc, SCSIID_ULTRA2); |
| 7784 | else |
| 7785 | scsiid = ahc_inb(ahc, SCSIID); |
| 7786 | scsiid_mask = 0x1 << (scsiid & OID); |
| 7787 | if ((targid_mask & scsiid_mask) == 0) { |
| 7788 | u_int our_id; |
| 7789 | |
| 7790 | /* ffs counts from 1 */ |
| 7791 | our_id = ffs(targid_mask); |
| 7792 | if (our_id == 0) |
| 7793 | our_id = ahc->our_id; |
| 7794 | else |
| 7795 | our_id--; |
| 7796 | scsiid &= TID; |
| 7797 | scsiid |= our_id; |
| 7798 | } |
| 7799 | if ((ahc->features & AHC_ULTRA2) != 0) |
| 7800 | ahc_outb(ahc, SCSIID_ULTRA2, scsiid); |
| 7801 | else |
| 7802 | ahc_outb(ahc, SCSIID, scsiid); |
| 7803 | } |
| 7804 | |
Denys Vlasenko | d1d7b19 | 2008-04-25 04:34:49 +0200 | [diff] [blame] | 7805 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7806 | ahc_run_tqinfifo(struct ahc_softc *ahc, int paused) |
| 7807 | { |
| 7808 | struct target_cmd *cmd; |
| 7809 | |
| 7810 | /* |
| 7811 | * If the card supports auto-access pause, |
| 7812 | * we can access the card directly regardless |
| 7813 | * of whether it is paused or not. |
| 7814 | */ |
| 7815 | if ((ahc->features & AHC_AUTOPAUSE) != 0) |
| 7816 | paused = TRUE; |
| 7817 | |
| 7818 | ahc_sync_tqinfifo(ahc, BUS_DMASYNC_POSTREAD); |
| 7819 | while ((cmd = &ahc->targetcmds[ahc->tqinfifonext])->cmd_valid != 0) { |
| 7820 | |
| 7821 | /* |
| 7822 | * Only advance through the queue if we |
| 7823 | * have the resources to process the command. |
| 7824 | */ |
| 7825 | if (ahc_handle_target_cmd(ahc, cmd) != 0) |
| 7826 | break; |
| 7827 | |
| 7828 | cmd->cmd_valid = 0; |
| 7829 | ahc_dmamap_sync(ahc, ahc->shared_data_dmat, |
| 7830 | ahc->shared_data_dmamap, |
| 7831 | ahc_targetcmd_offset(ahc, ahc->tqinfifonext), |
| 7832 | sizeof(struct target_cmd), |
| 7833 | BUS_DMASYNC_PREREAD); |
| 7834 | ahc->tqinfifonext++; |
| 7835 | |
| 7836 | /* |
| 7837 | * Lazily update our position in the target mode incoming |
| 7838 | * command queue as seen by the sequencer. |
| 7839 | */ |
| 7840 | if ((ahc->tqinfifonext & (HOST_TQINPOS - 1)) == 1) { |
| 7841 | if ((ahc->features & AHC_HS_MAILBOX) != 0) { |
| 7842 | u_int hs_mailbox; |
| 7843 | |
| 7844 | hs_mailbox = ahc_inb(ahc, HS_MAILBOX); |
| 7845 | hs_mailbox &= ~HOST_TQINPOS; |
| 7846 | hs_mailbox |= ahc->tqinfifonext & HOST_TQINPOS; |
| 7847 | ahc_outb(ahc, HS_MAILBOX, hs_mailbox); |
| 7848 | } else { |
| 7849 | if (!paused) |
| 7850 | ahc_pause(ahc); |
| 7851 | ahc_outb(ahc, KERNEL_TQINPOS, |
| 7852 | ahc->tqinfifonext & HOST_TQINPOS); |
| 7853 | if (!paused) |
| 7854 | ahc_unpause(ahc); |
| 7855 | } |
| 7856 | } |
| 7857 | } |
| 7858 | } |
| 7859 | |
| 7860 | static int |
| 7861 | ahc_handle_target_cmd(struct ahc_softc *ahc, struct target_cmd *cmd) |
| 7862 | { |
| 7863 | struct ahc_tmode_tstate *tstate; |
| 7864 | struct ahc_tmode_lstate *lstate; |
| 7865 | struct ccb_accept_tio *atio; |
| 7866 | uint8_t *byte; |
| 7867 | int initiator; |
| 7868 | int target; |
| 7869 | int lun; |
| 7870 | |
| 7871 | initiator = SCSIID_TARGET(ahc, cmd->scsiid); |
| 7872 | target = SCSIID_OUR_ID(cmd->scsiid); |
| 7873 | lun = (cmd->identify & MSG_IDENTIFY_LUNMASK); |
| 7874 | |
| 7875 | byte = cmd->bytes; |
| 7876 | tstate = ahc->enabled_targets[target]; |
| 7877 | lstate = NULL; |
| 7878 | if (tstate != NULL) |
| 7879 | lstate = tstate->enabled_luns[lun]; |
| 7880 | |
| 7881 | /* |
| 7882 | * Commands for disabled luns go to the black hole driver. |
| 7883 | */ |
| 7884 | if (lstate == NULL) |
| 7885 | lstate = ahc->black_hole; |
| 7886 | |
| 7887 | atio = (struct ccb_accept_tio*)SLIST_FIRST(&lstate->accept_tios); |
| 7888 | if (atio == NULL) { |
| 7889 | ahc->flags |= AHC_TQINFIFO_BLOCKED; |
| 7890 | /* |
| 7891 | * Wait for more ATIOs from the peripheral driver for this lun. |
| 7892 | */ |
| 7893 | if (bootverbose) |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7894 | printk("%s: ATIOs exhausted\n", ahc_name(ahc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7895 | return (1); |
| 7896 | } else |
| 7897 | ahc->flags &= ~AHC_TQINFIFO_BLOCKED; |
| 7898 | #if 0 |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7899 | printk("Incoming command from %d for %d:%d%s\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7900 | initiator, target, lun, |
| 7901 | lstate == ahc->black_hole ? "(Black Holed)" : ""); |
| 7902 | #endif |
| 7903 | SLIST_REMOVE_HEAD(&lstate->accept_tios, sim_links.sle); |
| 7904 | |
| 7905 | if (lstate == ahc->black_hole) { |
| 7906 | /* Fill in the wildcards */ |
| 7907 | atio->ccb_h.target_id = target; |
| 7908 | atio->ccb_h.target_lun = lun; |
| 7909 | } |
| 7910 | |
| 7911 | /* |
| 7912 | * Package it up and send it off to |
| 7913 | * whomever has this lun enabled. |
| 7914 | */ |
| 7915 | atio->sense_len = 0; |
| 7916 | atio->init_id = initiator; |
| 7917 | if (byte[0] != 0xFF) { |
| 7918 | /* Tag was included */ |
| 7919 | atio->tag_action = *byte++; |
| 7920 | atio->tag_id = *byte++; |
| 7921 | atio->ccb_h.flags = CAM_TAG_ACTION_VALID; |
| 7922 | } else { |
| 7923 | atio->ccb_h.flags = 0; |
| 7924 | } |
| 7925 | byte++; |
| 7926 | |
| 7927 | /* Okay. Now determine the cdb size based on the command code */ |
| 7928 | switch (*byte >> CMD_GROUP_CODE_SHIFT) { |
| 7929 | case 0: |
| 7930 | atio->cdb_len = 6; |
| 7931 | break; |
| 7932 | case 1: |
| 7933 | case 2: |
| 7934 | atio->cdb_len = 10; |
| 7935 | break; |
| 7936 | case 4: |
| 7937 | atio->cdb_len = 16; |
| 7938 | break; |
| 7939 | case 5: |
| 7940 | atio->cdb_len = 12; |
| 7941 | break; |
| 7942 | case 3: |
| 7943 | default: |
| 7944 | /* Only copy the opcode. */ |
| 7945 | atio->cdb_len = 1; |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7946 | printk("Reserved or VU command code type encountered\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7947 | break; |
| 7948 | } |
| 7949 | |
| 7950 | memcpy(atio->cdb_io.cdb_bytes, byte, atio->cdb_len); |
| 7951 | |
| 7952 | atio->ccb_h.status |= CAM_CDB_RECVD; |
| 7953 | |
| 7954 | if ((cmd->identify & MSG_IDENTIFY_DISCFLAG) == 0) { |
| 7955 | /* |
| 7956 | * We weren't allowed to disconnect. |
| 7957 | * We're hanging on the bus until a |
| 7958 | * continue target I/O comes in response |
| 7959 | * to this accept tio. |
| 7960 | */ |
| 7961 | #if 0 |
Pekka Enberg | 48813cf | 2010-07-14 13:12:57 +0300 | [diff] [blame] | 7962 | printk("Received Immediate Command %d:%d:%d - %p\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7963 | initiator, target, lun, ahc->pending_device); |
| 7964 | #endif |
| 7965 | ahc->pending_device = lstate; |
| 7966 | ahc_freeze_ccb((union ccb *)atio); |
| 7967 | atio->ccb_h.flags |= CAM_DIS_DISCONNECT; |
| 7968 | } |
| 7969 | xpt_done((union ccb*)atio); |
| 7970 | return (0); |
| 7971 | } |
| 7972 | |
| 7973 | #endif |