Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * dc395x.c |
| 3 | * |
| 4 | * Device Driver for Tekram DC395(U/UW/F), DC315(U) |
| 5 | * PCI SCSI Bus Master Host Adapter |
| 6 | * (SCSI chip set used Tekram ASIC TRM-S1040) |
| 7 | * |
| 8 | * Authors: |
| 9 | * C.L. Huang <ching@tekram.com.tw> |
| 10 | * Erich Chen <erich@tekram.com.tw> |
| 11 | * (C) Copyright 1995-1999 Tekram Technology Co., Ltd. |
| 12 | * |
| 13 | * Kurt Garloff <garloff@suse.de> |
| 14 | * (C) 1999-2000 Kurt Garloff |
| 15 | * |
| 16 | * Oliver Neukum <oliver@neukum.name> |
| 17 | * Ali Akcaagac <aliakc@web.de> |
| 18 | * Jamie Lenehan <lenehan@twibble.org> |
| 19 | * (C) 2003 |
| 20 | * |
| 21 | * License: GNU GPL |
| 22 | * |
| 23 | ************************************************************************* |
| 24 | * |
| 25 | * Redistribution and use in source and binary forms, with or without |
| 26 | * modification, are permitted provided that the following conditions |
| 27 | * are met: |
| 28 | * 1. Redistributions of source code must retain the above copyright |
| 29 | * notice, this list of conditions and the following disclaimer. |
| 30 | * 2. Redistributions in binary form must reproduce the above copyright |
| 31 | * notice, this list of conditions and the following disclaimer in the |
| 32 | * documentation and/or other materials provided with the distribution. |
| 33 | * 3. The name of the author may not be used to endorse or promote products |
| 34 | * derived from this software without specific prior written permission. |
| 35 | * |
| 36 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 37 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 38 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 39 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 40 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 41 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 42 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 43 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 44 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 45 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 46 | * |
| 47 | ************************************************************************ |
| 48 | */ |
| 49 | #include <linux/module.h> |
| 50 | #include <linux/moduleparam.h> |
| 51 | #include <linux/delay.h> |
| 52 | #include <linux/ctype.h> |
| 53 | #include <linux/blkdev.h> |
| 54 | #include <linux/interrupt.h> |
| 55 | #include <linux/init.h> |
| 56 | #include <linux/spinlock.h> |
| 57 | #include <linux/pci.h> |
| 58 | #include <linux/list.h> |
| 59 | #include <linux/vmalloc.h> |
| 60 | #include <asm/io.h> |
| 61 | |
| 62 | #include <scsi/scsi.h> |
| 63 | #include <scsi/scsicam.h> /* needed for scsicam_bios_param */ |
| 64 | #include <scsi/scsi_cmnd.h> |
| 65 | #include <scsi/scsi_device.h> |
| 66 | #include <scsi/scsi_host.h> |
| 67 | |
| 68 | #include "dc395x.h" |
| 69 | |
| 70 | #define DC395X_NAME "dc395x" |
| 71 | #define DC395X_BANNER "Tekram DC395(U/UW/F), DC315(U) - ASIC TRM-S1040" |
| 72 | #define DC395X_VERSION "v2.05, 2004/03/08" |
| 73 | |
| 74 | /*--------------------------------------------------------------------------- |
| 75 | Features |
| 76 | ---------------------------------------------------------------------------*/ |
| 77 | /* |
| 78 | * Set to disable parts of the driver |
| 79 | */ |
| 80 | /*#define DC395x_NO_DISCONNECT*/ |
| 81 | /*#define DC395x_NO_TAGQ*/ |
| 82 | /*#define DC395x_NO_SYNC*/ |
| 83 | /*#define DC395x_NO_WIDE*/ |
| 84 | |
| 85 | /*--------------------------------------------------------------------------- |
| 86 | Debugging |
| 87 | ---------------------------------------------------------------------------*/ |
| 88 | /* |
| 89 | * Types of debugging that can be enabled and disabled |
| 90 | */ |
| 91 | #define DBG_KG 0x0001 |
| 92 | #define DBG_0 0x0002 |
| 93 | #define DBG_1 0x0004 |
| 94 | #define DBG_SG 0x0020 |
| 95 | #define DBG_FIFO 0x0040 |
| 96 | #define DBG_PIO 0x0080 |
| 97 | |
| 98 | |
| 99 | /* |
| 100 | * Set set of things to output debugging for. |
| 101 | * Undefine to remove all debugging |
| 102 | */ |
| 103 | /*#define DEBUG_MASK (DBG_0|DBG_1|DBG_SG|DBG_FIFO|DBG_PIO)*/ |
| 104 | /*#define DEBUG_MASK DBG_0*/ |
| 105 | |
| 106 | |
| 107 | /* |
| 108 | * Output a kernel mesage at the specified level and append the |
| 109 | * driver name and a ": " to the start of the message |
| 110 | */ |
| 111 | #define dprintkl(level, format, arg...) \ |
| 112 | printk(level DC395X_NAME ": " format , ## arg) |
| 113 | |
| 114 | |
| 115 | #ifdef DEBUG_MASK |
| 116 | /* |
| 117 | * print a debug message - this is formated with KERN_DEBUG, then the |
| 118 | * driver name followed by a ": " and then the message is output. |
| 119 | * This also checks that the specified debug level is enabled before |
| 120 | * outputing the message |
| 121 | */ |
| 122 | #define dprintkdbg(type, format, arg...) \ |
| 123 | do { \ |
| 124 | if ((type) & (DEBUG_MASK)) \ |
| 125 | dprintkl(KERN_DEBUG , format , ## arg); \ |
| 126 | } while (0) |
| 127 | |
| 128 | /* |
| 129 | * Check if the specified type of debugging is enabled |
| 130 | */ |
| 131 | #define debug_enabled(type) ((DEBUG_MASK) & (type)) |
| 132 | |
| 133 | #else |
| 134 | /* |
| 135 | * No debugging. Do nothing |
| 136 | */ |
| 137 | #define dprintkdbg(type, format, arg...) \ |
| 138 | do {} while (0) |
| 139 | #define debug_enabled(type) (0) |
| 140 | |
| 141 | #endif |
| 142 | |
| 143 | |
| 144 | #ifndef PCI_VENDOR_ID_TEKRAM |
| 145 | #define PCI_VENDOR_ID_TEKRAM 0x1DE1 /* Vendor ID */ |
| 146 | #endif |
| 147 | #ifndef PCI_DEVICE_ID_TEKRAM_TRMS1040 |
| 148 | #define PCI_DEVICE_ID_TEKRAM_TRMS1040 0x0391 /* Device ID */ |
| 149 | #endif |
| 150 | |
| 151 | |
| 152 | #define DC395x_LOCK_IO(dev,flags) spin_lock_irqsave(((struct Scsi_Host *)dev)->host_lock, flags) |
| 153 | #define DC395x_UNLOCK_IO(dev,flags) spin_unlock_irqrestore(((struct Scsi_Host *)dev)->host_lock, flags) |
| 154 | |
| 155 | #define DC395x_read8(acb,address) (u8)(inb(acb->io_port_base + (address))) |
| 156 | #define DC395x_read16(acb,address) (u16)(inw(acb->io_port_base + (address))) |
| 157 | #define DC395x_read32(acb,address) (u32)(inl(acb->io_port_base + (address))) |
| 158 | #define DC395x_write8(acb,address,value) outb((value), acb->io_port_base + (address)) |
| 159 | #define DC395x_write16(acb,address,value) outw((value), acb->io_port_base + (address)) |
| 160 | #define DC395x_write32(acb,address,value) outl((value), acb->io_port_base + (address)) |
| 161 | |
| 162 | /* cmd->result */ |
| 163 | #define RES_TARGET 0x000000FF /* Target State */ |
| 164 | #define RES_TARGET_LNX STATUS_MASK /* Only official ... */ |
| 165 | #define RES_ENDMSG 0x0000FF00 /* End Message */ |
| 166 | #define RES_DID 0x00FF0000 /* DID_ codes */ |
| 167 | #define RES_DRV 0xFF000000 /* DRIVER_ codes */ |
| 168 | |
| 169 | #define MK_RES(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)) |
| 170 | #define MK_RES_LNX(drv,did,msg,tgt) ((int)(drv)<<24 | (int)(did)<<16 | (int)(msg)<<8 | (int)(tgt)<<1) |
| 171 | |
| 172 | #define SET_RES_TARGET(who,tgt) { who &= ~RES_TARGET; who |= (int)(tgt); } |
| 173 | #define SET_RES_TARGET_LNX(who,tgt) { who &= ~RES_TARGET_LNX; who |= (int)(tgt) << 1; } |
| 174 | #define SET_RES_MSG(who,msg) { who &= ~RES_ENDMSG; who |= (int)(msg) << 8; } |
| 175 | #define SET_RES_DID(who,did) { who &= ~RES_DID; who |= (int)(did) << 16; } |
| 176 | #define SET_RES_DRV(who,drv) { who &= ~RES_DRV; who |= (int)(drv) << 24; } |
| 177 | |
| 178 | #define TAG_NONE 255 |
| 179 | |
| 180 | /* |
| 181 | * srb->segement_x is the hw sg list. It is always allocated as a |
| 182 | * DC395x_MAX_SG_LISTENTRY entries in a linear block which does not |
| 183 | * cross a page boundy. |
| 184 | */ |
| 185 | #define SEGMENTX_LEN (sizeof(struct SGentry)*DC395x_MAX_SG_LISTENTRY) |
| 186 | #define VIRTX_LEN (sizeof(void *) * DC395x_MAX_SG_LISTENTRY) |
| 187 | |
| 188 | struct SGentry { |
| 189 | u32 address; /* bus! address */ |
| 190 | u32 length; |
| 191 | }; |
| 192 | |
| 193 | /* The SEEPROM structure for TRM_S1040 */ |
| 194 | struct NVRamTarget { |
| 195 | u8 cfg0; /* Target configuration byte 0 */ |
| 196 | u8 period; /* Target period */ |
| 197 | u8 cfg2; /* Target configuration byte 2 */ |
| 198 | u8 cfg3; /* Target configuration byte 3 */ |
| 199 | }; |
| 200 | |
| 201 | struct NvRamType { |
| 202 | u8 sub_vendor_id[2]; /* 0,1 Sub Vendor ID */ |
| 203 | u8 sub_sys_id[2]; /* 2,3 Sub System ID */ |
| 204 | u8 sub_class; /* 4 Sub Class */ |
| 205 | u8 vendor_id[2]; /* 5,6 Vendor ID */ |
| 206 | u8 device_id[2]; /* 7,8 Device ID */ |
| 207 | u8 reserved; /* 9 Reserved */ |
| 208 | struct NVRamTarget target[DC395x_MAX_SCSI_ID]; |
| 209 | /** 10,11,12,13 |
| 210 | ** 14,15,16,17 |
| 211 | ** .... |
| 212 | ** .... |
| 213 | ** 70,71,72,73 |
| 214 | */ |
| 215 | u8 scsi_id; /* 74 Host Adapter SCSI ID */ |
| 216 | u8 channel_cfg; /* 75 Channel configuration */ |
| 217 | u8 delay_time; /* 76 Power on delay time */ |
| 218 | u8 max_tag; /* 77 Maximum tags */ |
| 219 | u8 reserved0; /* 78 */ |
| 220 | u8 boot_target; /* 79 */ |
| 221 | u8 boot_lun; /* 80 */ |
| 222 | u8 reserved1; /* 81 */ |
| 223 | u16 reserved2[22]; /* 82,..125 */ |
| 224 | u16 cksum; /* 126,127 */ |
| 225 | }; |
| 226 | |
| 227 | struct ScsiReqBlk { |
| 228 | struct list_head list; /* next/prev ptrs for srb lists */ |
| 229 | struct DeviceCtlBlk *dcb; |
| 230 | struct scsi_cmnd *cmd; |
| 231 | |
| 232 | struct SGentry *segment_x; /* Linear array of hw sg entries (up to 64 entries) */ |
| 233 | u32 sg_bus_addr; /* Bus address of sg list (ie, of segment_x) */ |
| 234 | |
| 235 | u8 sg_count; /* No of HW sg entries for this request */ |
| 236 | u8 sg_index; /* Index of HW sg entry for this request */ |
| 237 | u32 total_xfer_length; /* Total number of bytes remaining to be transfered */ |
| 238 | void **virt_map; |
| 239 | unsigned char *virt_addr; /* Virtual address of current transfer position */ |
| 240 | |
| 241 | /* |
| 242 | * The sense buffer handling function, request_sense, uses |
| 243 | * the first hw sg entry (segment_x[0]) and the transfer |
| 244 | * length (total_xfer_length). While doing this it stores the |
| 245 | * original values into the last sg hw list |
| 246 | * (srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1] and the |
| 247 | * total_xfer_length in xferred. These values are restored in |
| 248 | * pci_unmap_srb_sense. This is the only place xferred is used. |
| 249 | */ |
| 250 | u32 xferred; /* Saved copy of total_xfer_length */ |
| 251 | |
| 252 | u16 state; |
| 253 | |
| 254 | u8 msgin_buf[6]; |
| 255 | u8 msgout_buf[6]; |
| 256 | |
| 257 | u8 adapter_status; |
| 258 | u8 target_status; |
| 259 | u8 msg_count; |
| 260 | u8 end_message; |
| 261 | |
| 262 | u8 tag_number; |
| 263 | u8 status; |
| 264 | u8 retry_count; |
| 265 | u8 flag; |
| 266 | |
| 267 | u8 scsi_phase; |
| 268 | }; |
| 269 | |
| 270 | struct DeviceCtlBlk { |
| 271 | struct list_head list; /* next/prev ptrs for the dcb list */ |
| 272 | struct AdapterCtlBlk *acb; |
| 273 | struct list_head srb_going_list; /* head of going srb list */ |
| 274 | struct list_head srb_waiting_list; /* head of waiting srb list */ |
| 275 | |
| 276 | struct ScsiReqBlk *active_srb; |
| 277 | u32 tag_mask; |
| 278 | |
| 279 | u16 max_command; |
| 280 | |
| 281 | u8 target_id; /* SCSI Target ID (SCSI Only) */ |
| 282 | u8 target_lun; /* SCSI Log. Unit (SCSI Only) */ |
| 283 | u8 identify_msg; |
| 284 | u8 dev_mode; |
| 285 | |
| 286 | u8 inquiry7; /* To store Inquiry flags */ |
| 287 | u8 sync_mode; /* 0:async mode */ |
| 288 | u8 min_nego_period; /* for nego. */ |
| 289 | u8 sync_period; /* for reg. */ |
| 290 | |
| 291 | u8 sync_offset; /* for reg. and nego.(low nibble) */ |
| 292 | u8 flag; |
| 293 | u8 dev_type; |
| 294 | u8 init_tcq_flag; |
| 295 | }; |
| 296 | |
| 297 | struct AdapterCtlBlk { |
| 298 | struct Scsi_Host *scsi_host; |
| 299 | |
| 300 | unsigned long io_port_base; |
| 301 | unsigned long io_port_len; |
| 302 | |
| 303 | struct list_head dcb_list; /* head of going dcb list */ |
| 304 | struct DeviceCtlBlk *dcb_run_robin; |
| 305 | struct DeviceCtlBlk *active_dcb; |
| 306 | |
| 307 | struct list_head srb_free_list; /* head of free srb list */ |
| 308 | struct ScsiReqBlk *tmp_srb; |
| 309 | struct timer_list waiting_timer; |
| 310 | struct timer_list selto_timer; |
| 311 | |
| 312 | u16 srb_count; |
| 313 | |
| 314 | u8 sel_timeout; |
| 315 | |
| 316 | unsigned int irq_level; |
| 317 | u8 tag_max_num; |
| 318 | u8 acb_flag; |
| 319 | u8 gmode2; |
| 320 | |
| 321 | u8 config; |
| 322 | u8 lun_chk; |
| 323 | u8 scan_devices; |
| 324 | u8 hostid_bit; |
| 325 | |
| 326 | u8 dcb_map[DC395x_MAX_SCSI_ID]; |
| 327 | struct DeviceCtlBlk *children[DC395x_MAX_SCSI_ID][32]; |
| 328 | |
| 329 | struct pci_dev *dev; |
| 330 | |
| 331 | u8 msg_len; |
| 332 | |
| 333 | struct ScsiReqBlk srb_array[DC395x_MAX_SRB_CNT]; |
| 334 | struct ScsiReqBlk srb; |
| 335 | |
| 336 | struct NvRamType eeprom; /* eeprom settings for this adapter */ |
| 337 | }; |
| 338 | |
| 339 | |
| 340 | /*--------------------------------------------------------------------------- |
| 341 | Forward declarations |
| 342 | ---------------------------------------------------------------------------*/ |
| 343 | static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 344 | u16 *pscsi_status); |
| 345 | static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 346 | u16 *pscsi_status); |
| 347 | static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 348 | u16 *pscsi_status); |
| 349 | static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 350 | u16 *pscsi_status); |
| 351 | static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 352 | u16 *pscsi_status); |
| 353 | static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 354 | u16 *pscsi_status); |
| 355 | static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 356 | u16 *pscsi_status); |
| 357 | static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 358 | u16 *pscsi_status); |
| 359 | static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 360 | u16 *pscsi_status); |
| 361 | static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 362 | u16 *pscsi_status); |
| 363 | static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 364 | u16 *pscsi_status); |
| 365 | static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 366 | u16 *pscsi_status); |
| 367 | static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 368 | u16 *pscsi_status); |
| 369 | static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 370 | u16 *pscsi_status); |
| 371 | static void set_basic_config(struct AdapterCtlBlk *acb); |
| 372 | static void cleanup_after_transfer(struct AdapterCtlBlk *acb, |
| 373 | struct ScsiReqBlk *srb); |
| 374 | static void reset_scsi_bus(struct AdapterCtlBlk *acb); |
| 375 | static void data_io_transfer(struct AdapterCtlBlk *acb, |
| 376 | struct ScsiReqBlk *srb, u16 io_dir); |
| 377 | static void disconnect(struct AdapterCtlBlk *acb); |
| 378 | static void reselect(struct AdapterCtlBlk *acb); |
| 379 | static u8 start_scsi(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, |
| 380 | struct ScsiReqBlk *srb); |
| 381 | static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, |
| 382 | struct ScsiReqBlk *srb); |
| 383 | static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, |
| 384 | struct ScsiReqBlk *srb); |
| 385 | static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_code, |
| 386 | struct scsi_cmnd *cmd, u8 force); |
| 387 | static void scsi_reset_detect(struct AdapterCtlBlk *acb); |
| 388 | static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb); |
| 389 | static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, |
| 390 | struct ScsiReqBlk *srb); |
| 391 | static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, |
| 392 | struct ScsiReqBlk *srb); |
| 393 | static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, |
| 394 | struct ScsiReqBlk *srb); |
| 395 | static void set_xfer_rate(struct AdapterCtlBlk *acb, |
| 396 | struct DeviceCtlBlk *dcb); |
| 397 | static void waiting_timeout(unsigned long ptr); |
| 398 | |
| 399 | |
| 400 | /*--------------------------------------------------------------------------- |
| 401 | Static Data |
| 402 | ---------------------------------------------------------------------------*/ |
| 403 | static u16 current_sync_offset = 0; |
| 404 | |
| 405 | static void *dc395x_scsi_phase0[] = { |
| 406 | data_out_phase0,/* phase:0 */ |
| 407 | data_in_phase0, /* phase:1 */ |
| 408 | command_phase0, /* phase:2 */ |
| 409 | status_phase0, /* phase:3 */ |
| 410 | nop0, /* phase:4 PH_BUS_FREE .. initial phase */ |
| 411 | nop0, /* phase:5 PH_BUS_FREE .. initial phase */ |
| 412 | msgout_phase0, /* phase:6 */ |
| 413 | msgin_phase0, /* phase:7 */ |
| 414 | }; |
| 415 | |
| 416 | static void *dc395x_scsi_phase1[] = { |
| 417 | data_out_phase1,/* phase:0 */ |
| 418 | data_in_phase1, /* phase:1 */ |
| 419 | command_phase1, /* phase:2 */ |
| 420 | status_phase1, /* phase:3 */ |
| 421 | nop1, /* phase:4 PH_BUS_FREE .. initial phase */ |
| 422 | nop1, /* phase:5 PH_BUS_FREE .. initial phase */ |
| 423 | msgout_phase1, /* phase:6 */ |
| 424 | msgin_phase1, /* phase:7 */ |
| 425 | }; |
| 426 | |
| 427 | /* |
| 428 | *Fast20: 000 50ns, 20.0 MHz |
| 429 | * 001 75ns, 13.3 MHz |
| 430 | * 010 100ns, 10.0 MHz |
| 431 | * 011 125ns, 8.0 MHz |
| 432 | * 100 150ns, 6.6 MHz |
| 433 | * 101 175ns, 5.7 MHz |
| 434 | * 110 200ns, 5.0 MHz |
| 435 | * 111 250ns, 4.0 MHz |
| 436 | * |
| 437 | *Fast40(LVDS): 000 25ns, 40.0 MHz |
| 438 | * 001 50ns, 20.0 MHz |
| 439 | * 010 75ns, 13.3 MHz |
| 440 | * 011 100ns, 10.0 MHz |
| 441 | * 100 125ns, 8.0 MHz |
| 442 | * 101 150ns, 6.6 MHz |
| 443 | * 110 175ns, 5.7 MHz |
| 444 | * 111 200ns, 5.0 MHz |
| 445 | */ |
| 446 | /*static u8 clock_period[] = {12,19,25,31,37,44,50,62};*/ |
| 447 | |
| 448 | /* real period:48ns,76ns,100ns,124ns,148ns,176ns,200ns,248ns */ |
| 449 | static u8 clock_period[] = { 12, 18, 25, 31, 37, 43, 50, 62 }; |
| 450 | static u16 clock_speed[] = { 200, 133, 100, 80, 67, 58, 50, 40 }; |
| 451 | |
| 452 | |
| 453 | /*--------------------------------------------------------------------------- |
| 454 | Configuration |
| 455 | ---------------------------------------------------------------------------*/ |
| 456 | /* |
| 457 | * Module/boot parameters currently effect *all* instances of the |
| 458 | * card in the system. |
| 459 | */ |
| 460 | |
| 461 | /* |
| 462 | * Command line parameters are stored in a structure below. |
| 463 | * These are the index's into the structure for the various |
| 464 | * command line options. |
| 465 | */ |
| 466 | #define CFG_ADAPTER_ID 0 |
| 467 | #define CFG_MAX_SPEED 1 |
| 468 | #define CFG_DEV_MODE 2 |
| 469 | #define CFG_ADAPTER_MODE 3 |
| 470 | #define CFG_TAGS 4 |
| 471 | #define CFG_RESET_DELAY 5 |
| 472 | |
| 473 | #define CFG_NUM 6 /* number of configuration items */ |
| 474 | |
| 475 | |
| 476 | /* |
| 477 | * Value used to indicate that a command line override |
| 478 | * hasn't been used to modify the value. |
| 479 | */ |
| 480 | #define CFG_PARAM_UNSET -1 |
| 481 | |
| 482 | |
| 483 | /* |
| 484 | * Hold command line parameters. |
| 485 | */ |
| 486 | struct ParameterData { |
| 487 | int value; /* value of this setting */ |
| 488 | int min; /* minimum value */ |
| 489 | int max; /* maximum value */ |
| 490 | int def; /* default value */ |
| 491 | int safe; /* safe value */ |
| 492 | }; |
| 493 | static struct ParameterData __devinitdata cfg_data[] = { |
| 494 | { /* adapter id */ |
| 495 | CFG_PARAM_UNSET, |
| 496 | 0, |
| 497 | 15, |
| 498 | 7, |
| 499 | 7 |
| 500 | }, |
| 501 | { /* max speed */ |
| 502 | CFG_PARAM_UNSET, |
| 503 | 0, |
| 504 | 7, |
| 505 | 1, /* 13.3Mhz */ |
| 506 | 4, /* 6.7Hmz */ |
| 507 | }, |
| 508 | { /* dev mode */ |
| 509 | CFG_PARAM_UNSET, |
| 510 | 0, |
| 511 | 0x3f, |
| 512 | NTC_DO_PARITY_CHK | NTC_DO_DISCONNECT | NTC_DO_SYNC_NEGO | |
| 513 | NTC_DO_WIDE_NEGO | NTC_DO_TAG_QUEUEING | |
| 514 | NTC_DO_SEND_START, |
| 515 | NTC_DO_PARITY_CHK | NTC_DO_SEND_START |
| 516 | }, |
| 517 | { /* adapter mode */ |
| 518 | CFG_PARAM_UNSET, |
| 519 | 0, |
| 520 | 0x2f, |
| 521 | #ifdef CONFIG_SCSI_MULTI_LUN |
| 522 | NAC_SCANLUN | |
| 523 | #endif |
| 524 | NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET |
| 525 | /*| NAC_ACTIVE_NEG*/, |
| 526 | NAC_GT2DRIVES | NAC_GREATER_1G | NAC_POWERON_SCSI_RESET | 0x08 |
| 527 | }, |
| 528 | { /* tags */ |
| 529 | CFG_PARAM_UNSET, |
| 530 | 0, |
| 531 | 5, |
| 532 | 3, /* 16 tags (??) */ |
| 533 | 2, |
| 534 | }, |
| 535 | { /* reset delay */ |
| 536 | CFG_PARAM_UNSET, |
| 537 | 0, |
| 538 | 180, |
| 539 | 1, /* 1 second */ |
| 540 | 10, /* 10 seconds */ |
| 541 | } |
| 542 | }; |
| 543 | |
| 544 | |
| 545 | /* |
| 546 | * Safe settings. If set to zero the the BIOS/default values with |
| 547 | * command line overrides will be used. If set to 1 then safe and |
| 548 | * slow settings will be used. |
| 549 | */ |
| 550 | static int use_safe_settings = 0; |
| 551 | module_param_named(safe, use_safe_settings, bool, 0); |
| 552 | MODULE_PARM_DESC(safe, "Use safe and slow settings only. Default: false"); |
| 553 | |
| 554 | |
| 555 | module_param_named(adapter_id, cfg_data[CFG_ADAPTER_ID].value, int, 0); |
| 556 | MODULE_PARM_DESC(adapter_id, "Adapter SCSI ID. Default 7 (0-15)"); |
| 557 | |
| 558 | module_param_named(max_speed, cfg_data[CFG_MAX_SPEED].value, int, 0); |
| 559 | MODULE_PARM_DESC(max_speed, "Maximum bus speed. Default 1 (0-7) Speeds: 0=20, 1=13.3, 2=10, 3=8, 4=6.7, 5=5.8, 6=5, 7=4 Mhz"); |
| 560 | |
| 561 | module_param_named(dev_mode, cfg_data[CFG_DEV_MODE].value, int, 0); |
| 562 | MODULE_PARM_DESC(dev_mode, "Device mode."); |
| 563 | |
| 564 | module_param_named(adapter_mode, cfg_data[CFG_ADAPTER_MODE].value, int, 0); |
| 565 | MODULE_PARM_DESC(adapter_mode, "Adapter mode."); |
| 566 | |
| 567 | module_param_named(tags, cfg_data[CFG_TAGS].value, int, 0); |
| 568 | MODULE_PARM_DESC(tags, "Number of tags (1<<x). Default 3 (0-5)"); |
| 569 | |
| 570 | module_param_named(reset_delay, cfg_data[CFG_RESET_DELAY].value, int, 0); |
| 571 | MODULE_PARM_DESC(reset_delay, "Reset delay in seconds. Default 1 (0-180)"); |
| 572 | |
| 573 | |
| 574 | /** |
| 575 | * set_safe_settings - if the use_safe_settings option is set then |
| 576 | * set all values to the safe and slow values. |
| 577 | **/ |
| 578 | static void __devinit set_safe_settings(void) |
| 579 | { |
| 580 | if (use_safe_settings) |
| 581 | { |
| 582 | int i; |
| 583 | |
| 584 | dprintkl(KERN_INFO, "Using safe settings.\n"); |
| 585 | for (i = 0; i < CFG_NUM; i++) |
| 586 | { |
| 587 | cfg_data[i].value = cfg_data[i].safe; |
| 588 | } |
| 589 | } |
| 590 | } |
| 591 | |
| 592 | |
| 593 | /** |
| 594 | * fix_settings - reset any boot parameters which are out of range |
| 595 | * back to the default values. |
| 596 | **/ |
| 597 | static void __devinit fix_settings(void) |
| 598 | { |
| 599 | int i; |
| 600 | |
| 601 | dprintkdbg(DBG_1, |
| 602 | "setup: AdapterId=%08x MaxSpeed=%08x DevMode=%08x " |
| 603 | "AdapterMode=%08x Tags=%08x ResetDelay=%08x\n", |
| 604 | cfg_data[CFG_ADAPTER_ID].value, |
| 605 | cfg_data[CFG_MAX_SPEED].value, |
| 606 | cfg_data[CFG_DEV_MODE].value, |
| 607 | cfg_data[CFG_ADAPTER_MODE].value, |
| 608 | cfg_data[CFG_TAGS].value, |
| 609 | cfg_data[CFG_RESET_DELAY].value); |
| 610 | for (i = 0; i < CFG_NUM; i++) |
| 611 | { |
| 612 | if (cfg_data[i].value < cfg_data[i].min |
| 613 | || cfg_data[i].value > cfg_data[i].max) |
| 614 | cfg_data[i].value = cfg_data[i].def; |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | |
| 619 | |
| 620 | /* |
| 621 | * Mapping from the eeprom delay index value (index into this array) |
| 622 | * to the the number of actual seconds that the delay should be for. |
| 623 | */ |
| 624 | static char __devinitdata eeprom_index_to_delay_map[] = |
| 625 | { 1, 3, 5, 10, 16, 30, 60, 120 }; |
| 626 | |
| 627 | |
| 628 | /** |
| 629 | * eeprom_index_to_delay - Take the eeprom delay setting and convert it |
| 630 | * into a number of seconds. |
| 631 | * |
| 632 | * @eeprom: The eeprom structure in which we find the delay index to map. |
| 633 | **/ |
| 634 | static void __devinit eeprom_index_to_delay(struct NvRamType *eeprom) |
| 635 | { |
| 636 | eeprom->delay_time = eeprom_index_to_delay_map[eeprom->delay_time]; |
| 637 | } |
| 638 | |
| 639 | |
| 640 | /** |
| 641 | * delay_to_eeprom_index - Take a delay in seconds and return the |
| 642 | * closest eeprom index which will delay for at least that amount of |
| 643 | * seconds. |
| 644 | * |
| 645 | * @delay: The delay, in seconds, to find the eeprom index for. |
| 646 | **/ |
| 647 | static int __devinit delay_to_eeprom_index(int delay) |
| 648 | { |
| 649 | u8 idx = 0; |
| 650 | while (idx < 7 && eeprom_index_to_delay_map[idx] < delay) |
| 651 | idx++; |
| 652 | return idx; |
| 653 | } |
| 654 | |
| 655 | |
| 656 | /** |
| 657 | * eeprom_override - Override the eeprom settings, in the provided |
| 658 | * eeprom structure, with values that have been set on the command |
| 659 | * line. |
| 660 | * |
| 661 | * @eeprom: The eeprom data to override with command line options. |
| 662 | **/ |
| 663 | static void __devinit eeprom_override(struct NvRamType *eeprom) |
| 664 | { |
| 665 | u8 id; |
| 666 | |
| 667 | /* Adapter Settings */ |
| 668 | if (cfg_data[CFG_ADAPTER_ID].value != CFG_PARAM_UNSET) |
| 669 | eeprom->scsi_id = (u8)cfg_data[CFG_ADAPTER_ID].value; |
| 670 | |
| 671 | if (cfg_data[CFG_ADAPTER_MODE].value != CFG_PARAM_UNSET) |
| 672 | eeprom->channel_cfg = (u8)cfg_data[CFG_ADAPTER_MODE].value; |
| 673 | |
| 674 | if (cfg_data[CFG_RESET_DELAY].value != CFG_PARAM_UNSET) |
| 675 | eeprom->delay_time = delay_to_eeprom_index( |
| 676 | cfg_data[CFG_RESET_DELAY].value); |
| 677 | |
| 678 | if (cfg_data[CFG_TAGS].value != CFG_PARAM_UNSET) |
| 679 | eeprom->max_tag = (u8)cfg_data[CFG_TAGS].value; |
| 680 | |
| 681 | /* Device Settings */ |
| 682 | for (id = 0; id < DC395x_MAX_SCSI_ID; id++) { |
| 683 | if (cfg_data[CFG_DEV_MODE].value != CFG_PARAM_UNSET) |
| 684 | eeprom->target[id].cfg0 = |
| 685 | (u8)cfg_data[CFG_DEV_MODE].value; |
| 686 | |
| 687 | if (cfg_data[CFG_MAX_SPEED].value != CFG_PARAM_UNSET) |
| 688 | eeprom->target[id].period = |
| 689 | (u8)cfg_data[CFG_MAX_SPEED].value; |
| 690 | |
| 691 | } |
| 692 | } |
| 693 | |
| 694 | |
| 695 | /*--------------------------------------------------------------------------- |
| 696 | ---------------------------------------------------------------------------*/ |
| 697 | |
| 698 | static unsigned int list_size(struct list_head *head) |
| 699 | { |
| 700 | unsigned int count = 0; |
| 701 | struct list_head *pos; |
| 702 | list_for_each(pos, head) |
| 703 | count++; |
| 704 | return count; |
| 705 | } |
| 706 | |
| 707 | |
| 708 | static struct DeviceCtlBlk *dcb_get_next(struct list_head *head, |
| 709 | struct DeviceCtlBlk *pos) |
| 710 | { |
| 711 | int use_next = 0; |
| 712 | struct DeviceCtlBlk* next = NULL; |
| 713 | struct DeviceCtlBlk* i; |
| 714 | |
| 715 | if (list_empty(head)) |
| 716 | return NULL; |
| 717 | |
| 718 | /* find supplied dcb and then select the next one */ |
| 719 | list_for_each_entry(i, head, list) |
| 720 | if (use_next) { |
| 721 | next = i; |
| 722 | break; |
| 723 | } else if (i == pos) { |
| 724 | use_next = 1; |
| 725 | } |
| 726 | /* if no next one take the head one (ie, wraparound) */ |
| 727 | if (!next) |
| 728 | list_for_each_entry(i, head, list) { |
| 729 | next = i; |
| 730 | break; |
| 731 | } |
| 732 | |
| 733 | return next; |
| 734 | } |
| 735 | |
| 736 | |
| 737 | static void free_tag(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) |
| 738 | { |
| 739 | if (srb->tag_number < 255) { |
| 740 | dcb->tag_mask &= ~(1 << srb->tag_number); /* free tag mask */ |
| 741 | srb->tag_number = 255; |
| 742 | } |
| 743 | } |
| 744 | |
| 745 | |
| 746 | /* Find cmd in SRB list */ |
| 747 | inline static struct ScsiReqBlk *find_cmd(struct scsi_cmnd *cmd, |
| 748 | struct list_head *head) |
| 749 | { |
| 750 | struct ScsiReqBlk *i; |
| 751 | list_for_each_entry(i, head, list) |
| 752 | if (i->cmd == cmd) |
| 753 | return i; |
| 754 | return NULL; |
| 755 | } |
| 756 | |
| 757 | |
| 758 | static struct ScsiReqBlk *srb_get_free(struct AdapterCtlBlk *acb) |
| 759 | { |
| 760 | struct list_head *head = &acb->srb_free_list; |
| 761 | struct ScsiReqBlk *srb = NULL; |
| 762 | |
| 763 | if (!list_empty(head)) { |
| 764 | srb = list_entry(head->next, struct ScsiReqBlk, list); |
| 765 | list_del(head->next); |
| 766 | dprintkdbg(DBG_0, "srb_get_free: srb=%p\n", srb); |
| 767 | } |
| 768 | return srb; |
| 769 | } |
| 770 | |
| 771 | |
| 772 | static void srb_free_insert(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) |
| 773 | { |
| 774 | dprintkdbg(DBG_0, "srb_free_insert: srb=%p\n", srb); |
| 775 | list_add_tail(&srb->list, &acb->srb_free_list); |
| 776 | } |
| 777 | |
| 778 | |
| 779 | static void srb_waiting_insert(struct DeviceCtlBlk *dcb, |
| 780 | struct ScsiReqBlk *srb) |
| 781 | { |
| 782 | dprintkdbg(DBG_0, "srb_waiting_insert: (pid#%li) <%02i-%i> srb=%p\n", |
| 783 | srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); |
| 784 | list_add(&srb->list, &dcb->srb_waiting_list); |
| 785 | } |
| 786 | |
| 787 | |
| 788 | static void srb_waiting_append(struct DeviceCtlBlk *dcb, |
| 789 | struct ScsiReqBlk *srb) |
| 790 | { |
| 791 | dprintkdbg(DBG_0, "srb_waiting_append: (pid#%li) <%02i-%i> srb=%p\n", |
| 792 | srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); |
| 793 | list_add_tail(&srb->list, &dcb->srb_waiting_list); |
| 794 | } |
| 795 | |
| 796 | |
| 797 | static void srb_going_append(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) |
| 798 | { |
| 799 | dprintkdbg(DBG_0, "srb_going_append: (pid#%li) <%02i-%i> srb=%p\n", |
| 800 | srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); |
| 801 | list_add_tail(&srb->list, &dcb->srb_going_list); |
| 802 | } |
| 803 | |
| 804 | |
| 805 | static void srb_going_remove(struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) |
| 806 | { |
| 807 | struct ScsiReqBlk *i; |
| 808 | struct ScsiReqBlk *tmp; |
| 809 | dprintkdbg(DBG_0, "srb_going_remove: (pid#%li) <%02i-%i> srb=%p\n", |
| 810 | srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); |
| 811 | |
| 812 | list_for_each_entry_safe(i, tmp, &dcb->srb_going_list, list) |
| 813 | if (i == srb) { |
| 814 | list_del(&srb->list); |
| 815 | break; |
| 816 | } |
| 817 | } |
| 818 | |
| 819 | |
| 820 | static void srb_waiting_remove(struct DeviceCtlBlk *dcb, |
| 821 | struct ScsiReqBlk *srb) |
| 822 | { |
| 823 | struct ScsiReqBlk *i; |
| 824 | struct ScsiReqBlk *tmp; |
| 825 | dprintkdbg(DBG_0, "srb_waiting_remove: (pid#%li) <%02i-%i> srb=%p\n", |
| 826 | srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); |
| 827 | |
| 828 | list_for_each_entry_safe(i, tmp, &dcb->srb_waiting_list, list) |
| 829 | if (i == srb) { |
| 830 | list_del(&srb->list); |
| 831 | break; |
| 832 | } |
| 833 | } |
| 834 | |
| 835 | |
| 836 | static void srb_going_to_waiting_move(struct DeviceCtlBlk *dcb, |
| 837 | struct ScsiReqBlk *srb) |
| 838 | { |
| 839 | dprintkdbg(DBG_0, |
| 840 | "srb_going_to_waiting_move: (pid#%li) <%02i-%i> srb=%p\n", |
| 841 | srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); |
| 842 | list_move(&srb->list, &dcb->srb_waiting_list); |
| 843 | } |
| 844 | |
| 845 | |
| 846 | static void srb_waiting_to_going_move(struct DeviceCtlBlk *dcb, |
| 847 | struct ScsiReqBlk *srb) |
| 848 | { |
| 849 | dprintkdbg(DBG_0, |
| 850 | "srb_waiting_to_going_move: (pid#%li) <%02i-%i> srb=%p\n", |
| 851 | srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); |
| 852 | list_move(&srb->list, &dcb->srb_going_list); |
| 853 | } |
| 854 | |
| 855 | |
| 856 | /* Sets the timer to wake us up */ |
| 857 | static void waiting_set_timer(struct AdapterCtlBlk *acb, unsigned long to) |
| 858 | { |
| 859 | if (timer_pending(&acb->waiting_timer)) |
| 860 | return; |
| 861 | init_timer(&acb->waiting_timer); |
| 862 | acb->waiting_timer.function = waiting_timeout; |
| 863 | acb->waiting_timer.data = (unsigned long) acb; |
| 864 | if (time_before(jiffies + to, acb->scsi_host->last_reset - HZ / 2)) |
| 865 | acb->waiting_timer.expires = |
| 866 | acb->scsi_host->last_reset - HZ / 2 + 1; |
| 867 | else |
| 868 | acb->waiting_timer.expires = jiffies + to + 1; |
| 869 | add_timer(&acb->waiting_timer); |
| 870 | } |
| 871 | |
| 872 | |
| 873 | /* Send the next command from the waiting list to the bus */ |
| 874 | static void waiting_process_next(struct AdapterCtlBlk *acb) |
| 875 | { |
| 876 | struct DeviceCtlBlk *start = NULL; |
| 877 | struct DeviceCtlBlk *pos; |
| 878 | struct DeviceCtlBlk *dcb; |
| 879 | struct ScsiReqBlk *srb; |
| 880 | struct list_head *dcb_list_head = &acb->dcb_list; |
| 881 | |
| 882 | if (acb->active_dcb |
| 883 | || (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) |
| 884 | return; |
| 885 | |
| 886 | if (timer_pending(&acb->waiting_timer)) |
| 887 | del_timer(&acb->waiting_timer); |
| 888 | |
| 889 | if (list_empty(dcb_list_head)) |
| 890 | return; |
| 891 | |
| 892 | /* |
| 893 | * Find the starting dcb. Need to find it again in the list |
| 894 | * since the list may have changed since we set the ptr to it |
| 895 | */ |
| 896 | list_for_each_entry(dcb, dcb_list_head, list) |
| 897 | if (dcb == acb->dcb_run_robin) { |
| 898 | start = dcb; |
| 899 | break; |
| 900 | } |
| 901 | if (!start) { |
| 902 | /* This can happen! */ |
| 903 | start = list_entry(dcb_list_head->next, typeof(*start), list); |
| 904 | acb->dcb_run_robin = start; |
| 905 | } |
| 906 | |
| 907 | |
| 908 | /* |
| 909 | * Loop over the dcb, but we start somewhere (potentially) in |
| 910 | * the middle of the loop so we need to manully do this. |
| 911 | */ |
| 912 | pos = start; |
| 913 | do { |
| 914 | struct list_head *waiting_list_head = &pos->srb_waiting_list; |
| 915 | |
| 916 | /* Make sure, the next another device gets scheduled ... */ |
| 917 | acb->dcb_run_robin = dcb_get_next(dcb_list_head, |
| 918 | acb->dcb_run_robin); |
| 919 | |
| 920 | if (list_empty(waiting_list_head) || |
| 921 | pos->max_command <= list_size(&pos->srb_going_list)) { |
| 922 | /* move to next dcb */ |
| 923 | pos = dcb_get_next(dcb_list_head, pos); |
| 924 | } else { |
| 925 | srb = list_entry(waiting_list_head->next, |
| 926 | struct ScsiReqBlk, list); |
| 927 | |
| 928 | /* Try to send to the bus */ |
| 929 | if (!start_scsi(acb, pos, srb)) |
| 930 | srb_waiting_to_going_move(pos, srb); |
| 931 | else |
| 932 | waiting_set_timer(acb, HZ/50); |
| 933 | break; |
| 934 | } |
| 935 | } while (pos != start); |
| 936 | } |
| 937 | |
| 938 | |
| 939 | /* Wake up waiting queue */ |
| 940 | static void waiting_timeout(unsigned long ptr) |
| 941 | { |
| 942 | unsigned long flags; |
| 943 | struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; |
| 944 | dprintkdbg(DBG_1, |
| 945 | "waiting_timeout: Queue woken up by timer. acb=%p\n", acb); |
| 946 | DC395x_LOCK_IO(acb->scsi_host, flags); |
| 947 | waiting_process_next(acb); |
| 948 | DC395x_UNLOCK_IO(acb->scsi_host, flags); |
| 949 | } |
| 950 | |
| 951 | |
| 952 | /* Get the DCB for a given ID/LUN combination */ |
| 953 | static struct DeviceCtlBlk *find_dcb(struct AdapterCtlBlk *acb, u8 id, u8 lun) |
| 954 | { |
| 955 | return acb->children[id][lun]; |
| 956 | } |
| 957 | |
| 958 | |
| 959 | /* Send SCSI Request Block (srb) to adapter (acb) */ |
| 960 | static void send_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) |
| 961 | { |
| 962 | struct DeviceCtlBlk *dcb = srb->dcb; |
| 963 | |
| 964 | if (dcb->max_command <= list_size(&dcb->srb_going_list) || |
| 965 | acb->active_dcb || |
| 966 | (acb->acb_flag & (RESET_DETECT + RESET_DONE + RESET_DEV))) { |
| 967 | srb_waiting_append(dcb, srb); |
| 968 | waiting_process_next(acb); |
| 969 | return; |
| 970 | } |
| 971 | |
| 972 | if (!start_scsi(acb, dcb, srb)) |
| 973 | srb_going_append(dcb, srb); |
| 974 | else { |
| 975 | srb_waiting_insert(dcb, srb); |
| 976 | waiting_set_timer(acb, HZ / 50); |
| 977 | } |
| 978 | } |
| 979 | |
| 980 | |
| 981 | /* Prepare SRB for being sent to Device DCB w/ command *cmd */ |
| 982 | static void build_srb(struct scsi_cmnd *cmd, struct DeviceCtlBlk *dcb, |
| 983 | struct ScsiReqBlk *srb) |
| 984 | { |
| 985 | enum dma_data_direction dir = cmd->sc_data_direction; |
| 986 | dprintkdbg(DBG_0, "build_srb: (pid#%li) <%02i-%i>\n", |
| 987 | cmd->pid, dcb->target_id, dcb->target_lun); |
| 988 | |
| 989 | srb->dcb = dcb; |
| 990 | srb->cmd = cmd; |
| 991 | srb->sg_count = 0; |
| 992 | srb->total_xfer_length = 0; |
| 993 | srb->sg_bus_addr = 0; |
| 994 | srb->virt_addr = NULL; |
| 995 | srb->sg_index = 0; |
| 996 | srb->adapter_status = 0; |
| 997 | srb->target_status = 0; |
| 998 | srb->msg_count = 0; |
| 999 | srb->status = 0; |
| 1000 | srb->flag = 0; |
| 1001 | srb->state = 0; |
| 1002 | srb->retry_count = 0; |
| 1003 | srb->tag_number = TAG_NONE; |
| 1004 | srb->scsi_phase = PH_BUS_FREE; /* initial phase */ |
| 1005 | srb->end_message = 0; |
| 1006 | |
| 1007 | if (dir == PCI_DMA_NONE || !cmd->request_buffer) { |
| 1008 | dprintkdbg(DBG_0, |
| 1009 | "build_srb: [0] len=%d buf=%p use_sg=%d !MAP=%08x\n", |
| 1010 | cmd->bufflen, cmd->request_buffer, |
| 1011 | cmd->use_sg, srb->segment_x[0].address); |
| 1012 | } else if (cmd->use_sg) { |
| 1013 | int i; |
| 1014 | u32 reqlen = cmd->request_bufflen; |
| 1015 | struct scatterlist *sl = (struct scatterlist *) |
| 1016 | cmd->request_buffer; |
| 1017 | struct SGentry *sgp = srb->segment_x; |
| 1018 | srb->sg_count = pci_map_sg(dcb->acb->dev, sl, cmd->use_sg, |
| 1019 | dir); |
| 1020 | dprintkdbg(DBG_0, |
| 1021 | "build_srb: [n] len=%d buf=%p use_sg=%d segs=%d\n", |
| 1022 | reqlen, cmd->request_buffer, cmd->use_sg, |
| 1023 | srb->sg_count); |
| 1024 | |
| 1025 | for (i = 0; i < srb->sg_count; i++) { |
| 1026 | u32 seglen = (u32)sg_dma_len(sl + i); |
| 1027 | sgp[i].address = (u32)sg_dma_address(sl + i); |
| 1028 | sgp[i].length = seglen; |
| 1029 | srb->total_xfer_length += seglen; |
| 1030 | srb->virt_map[i] = kmap(sl[i].page); |
| 1031 | } |
| 1032 | srb->virt_addr = srb->virt_map[0]; |
| 1033 | sgp += srb->sg_count - 1; |
| 1034 | |
| 1035 | /* |
| 1036 | * adjust last page if too big as it is allocated |
| 1037 | * on even page boundaries |
| 1038 | */ |
| 1039 | if (srb->total_xfer_length > reqlen) { |
| 1040 | sgp->length -= (srb->total_xfer_length - reqlen); |
| 1041 | srb->total_xfer_length = reqlen; |
| 1042 | } |
| 1043 | |
| 1044 | /* Fixup for WIDE padding - make sure length is even */ |
| 1045 | if (dcb->sync_period & WIDE_SYNC && |
| 1046 | srb->total_xfer_length % 2) { |
| 1047 | srb->total_xfer_length++; |
| 1048 | sgp->length++; |
| 1049 | } |
| 1050 | |
| 1051 | srb->sg_bus_addr = pci_map_single(dcb->acb->dev, |
| 1052 | srb->segment_x, |
| 1053 | SEGMENTX_LEN, |
| 1054 | PCI_DMA_TODEVICE); |
| 1055 | |
| 1056 | dprintkdbg(DBG_SG, "build_srb: [n] map sg %p->%08x(%05x)\n", |
| 1057 | srb->segment_x, srb->sg_bus_addr, SEGMENTX_LEN); |
| 1058 | } else { |
| 1059 | srb->total_xfer_length = cmd->request_bufflen; |
| 1060 | srb->sg_count = 1; |
| 1061 | srb->segment_x[0].address = |
| 1062 | pci_map_single(dcb->acb->dev, cmd->request_buffer, |
| 1063 | srb->total_xfer_length, dir); |
| 1064 | |
| 1065 | /* Fixup for WIDE padding - make sure length is even */ |
| 1066 | if (dcb->sync_period & WIDE_SYNC && srb->total_xfer_length % 2) |
| 1067 | srb->total_xfer_length++; |
| 1068 | |
| 1069 | srb->segment_x[0].length = srb->total_xfer_length; |
| 1070 | srb->virt_addr = cmd->request_buffer; |
| 1071 | dprintkdbg(DBG_0, |
| 1072 | "build_srb: [1] len=%d buf=%p use_sg=%d map=%08x\n", |
| 1073 | srb->total_xfer_length, cmd->request_buffer, |
| 1074 | cmd->use_sg, srb->segment_x[0].address); |
| 1075 | } |
| 1076 | } |
| 1077 | |
| 1078 | |
| 1079 | /** |
| 1080 | * dc395x_queue_command - queue scsi command passed from the mid |
| 1081 | * layer, invoke 'done' on completion |
| 1082 | * |
| 1083 | * @cmd: pointer to scsi command object |
| 1084 | * @done: function pointer to be invoked on completion |
| 1085 | * |
| 1086 | * Returns 1 if the adapter (host) is busy, else returns 0. One |
| 1087 | * reason for an adapter to be busy is that the number |
| 1088 | * of outstanding queued commands is already equal to |
| 1089 | * struct Scsi_Host::can_queue . |
| 1090 | * |
| 1091 | * Required: if struct Scsi_Host::can_queue is ever non-zero |
| 1092 | * then this function is required. |
| 1093 | * |
| 1094 | * Locks: struct Scsi_Host::host_lock held on entry (with "irqsave") |
| 1095 | * and is expected to be held on return. |
| 1096 | * |
| 1097 | **/ |
| 1098 | static int dc395x_queue_command(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)) |
| 1099 | { |
| 1100 | struct DeviceCtlBlk *dcb; |
| 1101 | struct ScsiReqBlk *srb; |
| 1102 | struct AdapterCtlBlk *acb = |
| 1103 | (struct AdapterCtlBlk *)cmd->device->host->hostdata; |
| 1104 | dprintkdbg(DBG_0, "queue_command: (pid#%li) <%02i-%i> cmnd=0x%02x\n", |
| 1105 | cmd->pid, cmd->device->id, cmd->device->lun, cmd->cmnd[0]); |
| 1106 | |
| 1107 | /* Assume BAD_TARGET; will be cleared later */ |
| 1108 | cmd->result = DID_BAD_TARGET << 16; |
| 1109 | |
| 1110 | /* ignore invalid targets */ |
| 1111 | if (cmd->device->id >= acb->scsi_host->max_id || |
| 1112 | cmd->device->lun >= acb->scsi_host->max_lun || |
| 1113 | cmd->device->lun >31) { |
| 1114 | goto complete; |
| 1115 | } |
| 1116 | |
| 1117 | /* does the specified lun on the specified device exist */ |
| 1118 | if (!(acb->dcb_map[cmd->device->id] & (1 << cmd->device->lun))) { |
| 1119 | dprintkl(KERN_INFO, "queue_command: Ignore target <%02i-%i>\n", |
| 1120 | cmd->device->id, cmd->device->lun); |
| 1121 | goto complete; |
| 1122 | } |
| 1123 | |
| 1124 | /* do we have a DCB for the device */ |
| 1125 | dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); |
| 1126 | if (!dcb) { |
| 1127 | /* should never happen */ |
| 1128 | dprintkl(KERN_ERR, "queue_command: No such device <%02i-%i>", |
| 1129 | cmd->device->id, cmd->device->lun); |
| 1130 | goto complete; |
| 1131 | } |
| 1132 | |
| 1133 | /* set callback and clear result in the command */ |
| 1134 | cmd->scsi_done = done; |
| 1135 | cmd->result = 0; |
| 1136 | |
| 1137 | srb = srb_get_free(acb); |
| 1138 | if (!srb) |
| 1139 | { |
| 1140 | /* |
| 1141 | * Return 1 since we are unable to queue this command at this |
| 1142 | * point in time. |
| 1143 | */ |
| 1144 | dprintkdbg(DBG_0, "queue_command: No free srb's\n"); |
| 1145 | return 1; |
| 1146 | } |
| 1147 | |
| 1148 | build_srb(cmd, dcb, srb); |
| 1149 | |
| 1150 | if (!list_empty(&dcb->srb_waiting_list)) { |
| 1151 | /* append to waiting queue */ |
| 1152 | srb_waiting_append(dcb, srb); |
| 1153 | waiting_process_next(acb); |
| 1154 | } else { |
| 1155 | /* process immediately */ |
| 1156 | send_srb(acb, srb); |
| 1157 | } |
| 1158 | dprintkdbg(DBG_1, "queue_command: (pid#%li) done\n", cmd->pid); |
| 1159 | return 0; |
| 1160 | |
| 1161 | complete: |
| 1162 | /* |
| 1163 | * Complete the command immediatey, and then return 0 to |
| 1164 | * indicate that we have handled the command. This is usually |
| 1165 | * done when the commad is for things like non existent |
| 1166 | * devices. |
| 1167 | */ |
| 1168 | done(cmd); |
| 1169 | return 0; |
| 1170 | } |
| 1171 | |
| 1172 | |
| 1173 | /* |
| 1174 | * Return the disk geometry for the given SCSI device. |
| 1175 | */ |
| 1176 | static int dc395x_bios_param(struct scsi_device *sdev, |
| 1177 | struct block_device *bdev, sector_t capacity, int *info) |
| 1178 | { |
| 1179 | #ifdef CONFIG_SCSI_DC395x_TRMS1040_TRADMAP |
| 1180 | int heads, sectors, cylinders; |
| 1181 | struct AdapterCtlBlk *acb; |
| 1182 | int size = capacity; |
| 1183 | |
| 1184 | dprintkdbg(DBG_0, "dc395x_bios_param..............\n"); |
| 1185 | acb = (struct AdapterCtlBlk *)sdev->host->hostdata; |
| 1186 | heads = 64; |
| 1187 | sectors = 32; |
| 1188 | cylinders = size / (heads * sectors); |
| 1189 | |
| 1190 | if ((acb->gmode2 & NAC_GREATER_1G) && (cylinders > 1024)) { |
| 1191 | heads = 255; |
| 1192 | sectors = 63; |
| 1193 | cylinders = size / (heads * sectors); |
| 1194 | } |
| 1195 | geom[0] = heads; |
| 1196 | geom[1] = sectors; |
| 1197 | geom[2] = cylinders; |
| 1198 | return 0; |
| 1199 | #else |
| 1200 | return scsicam_bios_param(bdev, capacity, info); |
| 1201 | #endif |
| 1202 | } |
| 1203 | |
| 1204 | |
| 1205 | static void dump_register_info(struct AdapterCtlBlk *acb, |
| 1206 | struct DeviceCtlBlk *dcb, struct ScsiReqBlk *srb) |
| 1207 | { |
| 1208 | u16 pstat; |
| 1209 | struct pci_dev *dev = acb->dev; |
| 1210 | pci_read_config_word(dev, PCI_STATUS, &pstat); |
| 1211 | if (!dcb) |
| 1212 | dcb = acb->active_dcb; |
| 1213 | if (!srb && dcb) |
| 1214 | srb = dcb->active_srb; |
| 1215 | if (srb) { |
| 1216 | if (!srb->cmd) |
| 1217 | dprintkl(KERN_INFO, "dump: srb=%p cmd=%p OOOPS!\n", |
| 1218 | srb, srb->cmd); |
| 1219 | else |
| 1220 | dprintkl(KERN_INFO, "dump: srb=%p cmd=%p (pid#%li) " |
| 1221 | "cmnd=0x%02x <%02i-%i>\n", |
| 1222 | srb, srb->cmd, srb->cmd->pid, |
| 1223 | srb->cmd->cmnd[0], srb->cmd->device->id, |
| 1224 | srb->cmd->device->lun); |
| 1225 | printk(" sglist=%p cnt=%i idx=%i len=%i\n", |
| 1226 | srb->segment_x, srb->sg_count, srb->sg_index, |
| 1227 | srb->total_xfer_length); |
| 1228 | printk(" state=0x%04x status=0x%02x phase=0x%02x (%sconn.)\n", |
| 1229 | srb->state, srb->status, srb->scsi_phase, |
| 1230 | (acb->active_dcb) ? "" : "not"); |
| 1231 | } |
| 1232 | dprintkl(KERN_INFO, "dump: SCSI{status=0x%04x fifocnt=0x%02x " |
| 1233 | "signals=0x%02x irqstat=0x%02x sync=0x%02x target=0x%02x " |
| 1234 | "rselid=0x%02x ctr=0x%08x irqen=0x%02x config=0x%04x " |
| 1235 | "config2=0x%02x cmd=0x%02x selto=0x%02x}\n", |
| 1236 | DC395x_read16(acb, TRM_S1040_SCSI_STATUS), |
| 1237 | DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), |
| 1238 | DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL), |
| 1239 | DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS), |
| 1240 | DC395x_read8(acb, TRM_S1040_SCSI_SYNC), |
| 1241 | DC395x_read8(acb, TRM_S1040_SCSI_TARGETID), |
| 1242 | DC395x_read8(acb, TRM_S1040_SCSI_IDMSG), |
| 1243 | DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), |
| 1244 | DC395x_read8(acb, TRM_S1040_SCSI_INTEN), |
| 1245 | DC395x_read16(acb, TRM_S1040_SCSI_CONFIG0), |
| 1246 | DC395x_read8(acb, TRM_S1040_SCSI_CONFIG2), |
| 1247 | DC395x_read8(acb, TRM_S1040_SCSI_COMMAND), |
| 1248 | DC395x_read8(acb, TRM_S1040_SCSI_TIMEOUT)); |
| 1249 | dprintkl(KERN_INFO, "dump: DMA{cmd=0x%04x fifocnt=0x%02x fstat=0x%02x " |
| 1250 | "irqstat=0x%02x irqen=0x%02x cfg=0x%04x tctr=0x%08x " |
| 1251 | "ctctr=0x%08x addr=0x%08x:0x%08x}\n", |
| 1252 | DC395x_read16(acb, TRM_S1040_DMA_COMMAND), |
| 1253 | DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), |
| 1254 | DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), |
| 1255 | DC395x_read8(acb, TRM_S1040_DMA_STATUS), |
| 1256 | DC395x_read8(acb, TRM_S1040_DMA_INTEN), |
| 1257 | DC395x_read16(acb, TRM_S1040_DMA_CONFIG), |
| 1258 | DC395x_read32(acb, TRM_S1040_DMA_XCNT), |
| 1259 | DC395x_read32(acb, TRM_S1040_DMA_CXCNT), |
| 1260 | DC395x_read32(acb, TRM_S1040_DMA_XHIGHADDR), |
| 1261 | DC395x_read32(acb, TRM_S1040_DMA_XLOWADDR)); |
| 1262 | dprintkl(KERN_INFO, "dump: gen{gctrl=0x%02x gstat=0x%02x gtmr=0x%02x} " |
| 1263 | "pci{status=0x%04x}\n", |
| 1264 | DC395x_read8(acb, TRM_S1040_GEN_CONTROL), |
| 1265 | DC395x_read8(acb, TRM_S1040_GEN_STATUS), |
| 1266 | DC395x_read8(acb, TRM_S1040_GEN_TIMER), |
| 1267 | pstat); |
| 1268 | } |
| 1269 | |
| 1270 | |
| 1271 | static inline void clear_fifo(struct AdapterCtlBlk *acb, char *txt) |
| 1272 | { |
| 1273 | #if debug_enabled(DBG_FIFO) |
| 1274 | u8 lines = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); |
| 1275 | u8 fifocnt = DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT); |
| 1276 | if (!(fifocnt & 0x40)) |
| 1277 | dprintkdbg(DBG_FIFO, |
| 1278 | "clear_fifo: (%i bytes) on phase %02x in %s\n", |
| 1279 | fifocnt & 0x3f, lines, txt); |
| 1280 | #endif |
| 1281 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRFIFO); |
| 1282 | } |
| 1283 | |
| 1284 | |
| 1285 | static void reset_dev_param(struct AdapterCtlBlk *acb) |
| 1286 | { |
| 1287 | struct DeviceCtlBlk *dcb; |
| 1288 | struct NvRamType *eeprom = &acb->eeprom; |
| 1289 | dprintkdbg(DBG_0, "reset_dev_param: acb=%p\n", acb); |
| 1290 | |
| 1291 | list_for_each_entry(dcb, &acb->dcb_list, list) { |
| 1292 | u8 period_index; |
| 1293 | |
| 1294 | dcb->sync_mode &= ~(SYNC_NEGO_DONE + WIDE_NEGO_DONE); |
| 1295 | dcb->sync_period = 0; |
| 1296 | dcb->sync_offset = 0; |
| 1297 | |
| 1298 | dcb->dev_mode = eeprom->target[dcb->target_id].cfg0; |
| 1299 | period_index = eeprom->target[dcb->target_id].period & 0x07; |
| 1300 | dcb->min_nego_period = clock_period[period_index]; |
| 1301 | if (!(dcb->dev_mode & NTC_DO_WIDE_NEGO) |
| 1302 | || !(acb->config & HCC_WIDE_CARD)) |
| 1303 | dcb->sync_mode &= ~WIDE_NEGO_ENABLE; |
| 1304 | } |
| 1305 | } |
| 1306 | |
| 1307 | |
| 1308 | /* |
| 1309 | * perform a hard reset on the SCSI bus |
| 1310 | * @cmd - some command for this host (for fetching hooks) |
| 1311 | * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). |
| 1312 | */ |
| 1313 | static int dc395x_eh_bus_reset(struct scsi_cmnd *cmd) |
| 1314 | { |
| 1315 | struct AdapterCtlBlk *acb = |
| 1316 | (struct AdapterCtlBlk *)cmd->device->host->hostdata; |
| 1317 | dprintkl(KERN_INFO, |
| 1318 | "eh_bus_reset: (pid#%li) target=<%02i-%i> cmd=%p\n", |
| 1319 | cmd->pid, cmd->device->id, cmd->device->lun, cmd); |
| 1320 | |
| 1321 | if (timer_pending(&acb->waiting_timer)) |
| 1322 | del_timer(&acb->waiting_timer); |
| 1323 | |
| 1324 | /* |
| 1325 | * disable interrupt |
| 1326 | */ |
| 1327 | DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); |
| 1328 | DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); |
| 1329 | DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); |
| 1330 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); |
| 1331 | |
| 1332 | reset_scsi_bus(acb); |
| 1333 | udelay(500); |
| 1334 | |
| 1335 | /* We may be in serious trouble. Wait some seconds */ |
| 1336 | acb->scsi_host->last_reset = |
| 1337 | jiffies + 3 * HZ / 2 + |
| 1338 | HZ * acb->eeprom.delay_time; |
| 1339 | |
| 1340 | /* |
| 1341 | * re-enable interrupt |
| 1342 | */ |
| 1343 | /* Clear SCSI FIFO */ |
| 1344 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); |
| 1345 | clear_fifo(acb, "eh_bus_reset"); |
| 1346 | /* Delete pending IRQ */ |
| 1347 | DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); |
| 1348 | set_basic_config(acb); |
| 1349 | |
| 1350 | reset_dev_param(acb); |
| 1351 | doing_srb_done(acb, DID_RESET, cmd, 0); |
| 1352 | acb->active_dcb = NULL; |
| 1353 | acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE ,RESET_DEV */ |
| 1354 | waiting_process_next(acb); |
| 1355 | |
| 1356 | return SUCCESS; |
| 1357 | } |
| 1358 | |
| 1359 | |
| 1360 | /* |
| 1361 | * abort an errant SCSI command |
| 1362 | * @cmd - command to be aborted |
| 1363 | * Returns: SUCCESS (0x2002) on success, else FAILED (0x2003). |
| 1364 | */ |
| 1365 | static int dc395x_eh_abort(struct scsi_cmnd *cmd) |
| 1366 | { |
| 1367 | /* |
| 1368 | * Look into our command queues: If it has not been sent already, |
| 1369 | * we remove it and return success. Otherwise fail. |
| 1370 | */ |
| 1371 | struct AdapterCtlBlk *acb = |
| 1372 | (struct AdapterCtlBlk *)cmd->device->host->hostdata; |
| 1373 | struct DeviceCtlBlk *dcb; |
| 1374 | struct ScsiReqBlk *srb; |
| 1375 | dprintkl(KERN_INFO, "eh_abort: (pid#%li) target=<%02i-%i> cmd=%p\n", |
| 1376 | cmd->pid, cmd->device->id, cmd->device->lun, cmd); |
| 1377 | |
| 1378 | dcb = find_dcb(acb, cmd->device->id, cmd->device->lun); |
| 1379 | if (!dcb) { |
| 1380 | dprintkl(KERN_DEBUG, "eh_abort: No such device\n"); |
| 1381 | return FAILED; |
| 1382 | } |
| 1383 | |
| 1384 | srb = find_cmd(cmd, &dcb->srb_waiting_list); |
| 1385 | if (srb) { |
| 1386 | srb_waiting_remove(dcb, srb); |
| 1387 | pci_unmap_srb_sense(acb, srb); |
| 1388 | pci_unmap_srb(acb, srb); |
| 1389 | free_tag(dcb, srb); |
| 1390 | srb_free_insert(acb, srb); |
| 1391 | dprintkl(KERN_DEBUG, "eh_abort: Command was waiting\n"); |
| 1392 | cmd->result = DID_ABORT << 16; |
| 1393 | return SUCCESS; |
| 1394 | } |
| 1395 | srb = find_cmd(cmd, &dcb->srb_going_list); |
| 1396 | if (srb) { |
| 1397 | dprintkl(KERN_DEBUG, "eh_abort: Command in progress"); |
| 1398 | /* XXX: Should abort the command here */ |
| 1399 | } else { |
| 1400 | dprintkl(KERN_DEBUG, "eh_abort: Command not found"); |
| 1401 | } |
| 1402 | return FAILED; |
| 1403 | } |
| 1404 | |
| 1405 | |
| 1406 | /* SDTR */ |
| 1407 | static void build_sdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, |
| 1408 | struct ScsiReqBlk *srb) |
| 1409 | { |
| 1410 | u8 *ptr = srb->msgout_buf + srb->msg_count; |
| 1411 | if (srb->msg_count > 1) { |
| 1412 | dprintkl(KERN_INFO, |
| 1413 | "build_sdtr: msgout_buf BUSY (%i: %02x %02x)\n", |
| 1414 | srb->msg_count, srb->msgout_buf[0], |
| 1415 | srb->msgout_buf[1]); |
| 1416 | return; |
| 1417 | } |
| 1418 | if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) { |
| 1419 | dcb->sync_offset = 0; |
| 1420 | dcb->min_nego_period = 200 >> 2; |
| 1421 | } else if (dcb->sync_offset == 0) |
| 1422 | dcb->sync_offset = SYNC_NEGO_OFFSET; |
| 1423 | |
| 1424 | *ptr++ = MSG_EXTENDED; /* (01h) */ |
| 1425 | *ptr++ = 3; /* length */ |
| 1426 | *ptr++ = EXTENDED_SDTR; /* (01h) */ |
| 1427 | *ptr++ = dcb->min_nego_period; /* Transfer period (in 4ns) */ |
| 1428 | *ptr++ = dcb->sync_offset; /* Transfer period (max. REQ/ACK dist) */ |
| 1429 | srb->msg_count += 5; |
| 1430 | srb->state |= SRB_DO_SYNC_NEGO; |
| 1431 | } |
| 1432 | |
| 1433 | |
| 1434 | /* WDTR */ |
| 1435 | static void build_wdtr(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, |
| 1436 | struct ScsiReqBlk *srb) |
| 1437 | { |
| 1438 | u8 wide = ((dcb->dev_mode & NTC_DO_WIDE_NEGO) & |
| 1439 | (acb->config & HCC_WIDE_CARD)) ? 1 : 0; |
| 1440 | u8 *ptr = srb->msgout_buf + srb->msg_count; |
| 1441 | if (srb->msg_count > 1) { |
| 1442 | dprintkl(KERN_INFO, |
| 1443 | "build_wdtr: msgout_buf BUSY (%i: %02x %02x)\n", |
| 1444 | srb->msg_count, srb->msgout_buf[0], |
| 1445 | srb->msgout_buf[1]); |
| 1446 | return; |
| 1447 | } |
| 1448 | *ptr++ = MSG_EXTENDED; /* (01h) */ |
| 1449 | *ptr++ = 2; /* length */ |
| 1450 | *ptr++ = EXTENDED_WDTR; /* (03h) */ |
| 1451 | *ptr++ = wide; |
| 1452 | srb->msg_count += 4; |
| 1453 | srb->state |= SRB_DO_WIDE_NEGO; |
| 1454 | } |
| 1455 | |
| 1456 | |
| 1457 | #if 0 |
| 1458 | /* Timer to work around chip flaw: When selecting and the bus is |
| 1459 | * busy, we sometimes miss a Selection timeout IRQ */ |
| 1460 | void selection_timeout_missed(unsigned long ptr); |
| 1461 | /* Sets the timer to wake us up */ |
| 1462 | static void selto_timer(struct AdapterCtlBlk *acb) |
| 1463 | { |
| 1464 | if (timer_pending(&acb->selto_timer)) |
| 1465 | return; |
| 1466 | acb->selto_timer.function = selection_timeout_missed; |
| 1467 | acb->selto_timer.data = (unsigned long) acb; |
| 1468 | if (time_before |
| 1469 | (jiffies + HZ, acb->scsi_host->last_reset + HZ / 2)) |
| 1470 | acb->selto_timer.expires = |
| 1471 | acb->scsi_host->last_reset + HZ / 2 + 1; |
| 1472 | else |
| 1473 | acb->selto_timer.expires = jiffies + HZ + 1; |
| 1474 | add_timer(&acb->selto_timer); |
| 1475 | } |
| 1476 | |
| 1477 | |
| 1478 | void selection_timeout_missed(unsigned long ptr) |
| 1479 | { |
| 1480 | unsigned long flags; |
| 1481 | struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)ptr; |
| 1482 | struct ScsiReqBlk *srb; |
| 1483 | dprintkl(KERN_DEBUG, "Chip forgot to produce SelTO IRQ!\n"); |
| 1484 | if (!acb->active_dcb || !acb->active_dcb->active_srb) { |
| 1485 | dprintkl(KERN_DEBUG, "... but no cmd pending? Oops!\n"); |
| 1486 | return; |
| 1487 | } |
| 1488 | DC395x_LOCK_IO(acb->scsi_host, flags); |
| 1489 | srb = acb->active_dcb->active_srb; |
| 1490 | disconnect(acb); |
| 1491 | DC395x_UNLOCK_IO(acb->scsi_host, flags); |
| 1492 | } |
| 1493 | #endif |
| 1494 | |
| 1495 | |
| 1496 | static u8 start_scsi(struct AdapterCtlBlk* acb, struct DeviceCtlBlk* dcb, |
| 1497 | struct ScsiReqBlk* srb) |
| 1498 | { |
| 1499 | u16 s_stat2, return_code; |
| 1500 | u8 s_stat, scsicommand, i, identify_message; |
| 1501 | u8 *ptr; |
| 1502 | dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> srb=%p\n", |
| 1503 | srb->cmd->pid, dcb->target_id, dcb->target_lun, srb); |
| 1504 | |
| 1505 | srb->tag_number = TAG_NONE; /* acb->tag_max_num: had error read in eeprom */ |
| 1506 | |
| 1507 | s_stat = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); |
| 1508 | s_stat2 = 0; |
| 1509 | s_stat2 = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); |
| 1510 | #if 1 |
| 1511 | if (s_stat & 0x20 /* s_stat2 & 0x02000 */ ) { |
| 1512 | dprintkdbg(DBG_KG, "start_scsi: (pid#%li) BUSY %02x %04x\n", |
| 1513 | srb->cmd->pid, s_stat, s_stat2); |
| 1514 | /* |
| 1515 | * Try anyway? |
| 1516 | * |
| 1517 | * We could, BUT: Sometimes the TRM_S1040 misses to produce a Selection |
| 1518 | * Timeout, a Disconnect or a Reselction IRQ, so we would be screwed! |
| 1519 | * (This is likely to be a bug in the hardware. Obviously, most people |
| 1520 | * only have one initiator per SCSI bus.) |
| 1521 | * Instead let this fail and have the timer make sure the command is |
| 1522 | * tried again after a short time |
| 1523 | */ |
| 1524 | /*selto_timer (acb); */ |
| 1525 | return 1; |
| 1526 | } |
| 1527 | #endif |
| 1528 | if (acb->active_dcb) { |
| 1529 | dprintkl(KERN_DEBUG, "start_scsi: (pid#%li) Attempt to start a" |
| 1530 | "command while another command (pid#%li) is active.", |
| 1531 | srb->cmd->pid, |
| 1532 | acb->active_dcb->active_srb ? |
| 1533 | acb->active_dcb->active_srb->cmd->pid : 0); |
| 1534 | return 1; |
| 1535 | } |
| 1536 | if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { |
| 1537 | dprintkdbg(DBG_KG, "start_scsi: (pid#%li) Failed (busy)\n", |
| 1538 | srb->cmd->pid); |
| 1539 | return 1; |
| 1540 | } |
| 1541 | /* Allow starting of SCSI commands half a second before we allow the mid-level |
| 1542 | * to queue them again after a reset */ |
| 1543 | if (time_before(jiffies, acb->scsi_host->last_reset - HZ / 2)) { |
| 1544 | dprintkdbg(DBG_KG, "start_scsi: Refuse cmds (reset wait)\n"); |
| 1545 | return 1; |
| 1546 | } |
| 1547 | |
| 1548 | /* Flush FIFO */ |
| 1549 | clear_fifo(acb, "start_scsi"); |
| 1550 | DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); |
| 1551 | DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); |
| 1552 | DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); |
| 1553 | DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); |
| 1554 | srb->scsi_phase = PH_BUS_FREE; /* initial phase */ |
| 1555 | |
| 1556 | identify_message = dcb->identify_msg; |
| 1557 | /*DC395x_TRM_write8(TRM_S1040_SCSI_IDMSG, identify_message); */ |
| 1558 | /* Don't allow disconnection for AUTO_REQSENSE: Cont.All.Cond.! */ |
| 1559 | if (srb->flag & AUTO_REQSENSE) |
| 1560 | identify_message &= 0xBF; |
| 1561 | |
| 1562 | if (((srb->cmd->cmnd[0] == INQUIRY) |
| 1563 | || (srb->cmd->cmnd[0] == REQUEST_SENSE) |
| 1564 | || (srb->flag & AUTO_REQSENSE)) |
| 1565 | && (((dcb->sync_mode & WIDE_NEGO_ENABLE) |
| 1566 | && !(dcb->sync_mode & WIDE_NEGO_DONE)) |
| 1567 | || ((dcb->sync_mode & SYNC_NEGO_ENABLE) |
| 1568 | && !(dcb->sync_mode & SYNC_NEGO_DONE))) |
| 1569 | && (dcb->target_lun == 0)) { |
| 1570 | srb->msgout_buf[0] = identify_message; |
| 1571 | srb->msg_count = 1; |
| 1572 | scsicommand = SCMD_SEL_ATNSTOP; |
| 1573 | srb->state = SRB_MSGOUT; |
| 1574 | #ifndef SYNC_FIRST |
| 1575 | if (dcb->sync_mode & WIDE_NEGO_ENABLE |
| 1576 | && dcb->inquiry7 & SCSI_INQ_WBUS16) { |
| 1577 | build_wdtr(acb, dcb, srb); |
| 1578 | goto no_cmd; |
| 1579 | } |
| 1580 | #endif |
| 1581 | if (dcb->sync_mode & SYNC_NEGO_ENABLE |
| 1582 | && dcb->inquiry7 & SCSI_INQ_SYNC) { |
| 1583 | build_sdtr(acb, dcb, srb); |
| 1584 | goto no_cmd; |
| 1585 | } |
| 1586 | if (dcb->sync_mode & WIDE_NEGO_ENABLE |
| 1587 | && dcb->inquiry7 & SCSI_INQ_WBUS16) { |
| 1588 | build_wdtr(acb, dcb, srb); |
| 1589 | goto no_cmd; |
| 1590 | } |
| 1591 | srb->msg_count = 0; |
| 1592 | } |
| 1593 | /* Send identify message */ |
| 1594 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, identify_message); |
| 1595 | |
| 1596 | scsicommand = SCMD_SEL_ATN; |
| 1597 | srb->state = SRB_START_; |
| 1598 | #ifndef DC395x_NO_TAGQ |
| 1599 | if ((dcb->sync_mode & EN_TAG_QUEUEING) |
| 1600 | && (identify_message & 0xC0)) { |
| 1601 | /* Send Tag message */ |
| 1602 | u32 tag_mask = 1; |
| 1603 | u8 tag_number = 0; |
| 1604 | while (tag_mask & dcb->tag_mask |
| 1605 | && tag_number <= dcb->max_command) { |
| 1606 | tag_mask = tag_mask << 1; |
| 1607 | tag_number++; |
| 1608 | } |
| 1609 | if (tag_number >= dcb->max_command) { |
| 1610 | dprintkl(KERN_WARNING, "start_scsi: (pid#%li) " |
| 1611 | "Out of tags target=<%02i-%i>)\n", |
| 1612 | srb->cmd->pid, srb->cmd->device->id, |
| 1613 | srb->cmd->device->lun); |
| 1614 | srb->state = SRB_READY; |
| 1615 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, |
| 1616 | DO_HWRESELECT); |
| 1617 | return 1; |
| 1618 | } |
| 1619 | /* Send Tag id */ |
| 1620 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_SIMPLE_QTAG); |
| 1621 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, tag_number); |
| 1622 | dcb->tag_mask |= tag_mask; |
| 1623 | srb->tag_number = tag_number; |
| 1624 | scsicommand = SCMD_SEL_ATN3; |
| 1625 | srb->state = SRB_START_; |
| 1626 | } |
| 1627 | #endif |
| 1628 | /*polling:*/ |
| 1629 | /* Send CDB ..command block ......... */ |
| 1630 | dprintkdbg(DBG_KG, "start_scsi: (pid#%li) <%02i-%i> cmnd=0x%02x tag=%i\n", |
| 1631 | srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun, |
| 1632 | srb->cmd->cmnd[0], srb->tag_number); |
| 1633 | if (srb->flag & AUTO_REQSENSE) { |
| 1634 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); |
| 1635 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); |
| 1636 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
| 1637 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
| 1638 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, |
| 1639 | sizeof(srb->cmd->sense_buffer)); |
| 1640 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
| 1641 | } else { |
| 1642 | ptr = (u8 *)srb->cmd->cmnd; |
| 1643 | for (i = 0; i < srb->cmd->cmd_len; i++) |
| 1644 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); |
| 1645 | } |
| 1646 | no_cmd: |
| 1647 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, |
| 1648 | DO_HWRESELECT | DO_DATALATCH); |
| 1649 | if (DC395x_read16(acb, TRM_S1040_SCSI_STATUS) & SCSIINTERRUPT) { |
| 1650 | /* |
| 1651 | * If start_scsi return 1: |
| 1652 | * we caught an interrupt (must be reset or reselection ... ) |
| 1653 | * : Let's process it first! |
| 1654 | */ |
| 1655 | dprintkdbg(DBG_0, "start_scsi: (pid#%li) <%02i-%i> Failed - busy\n", |
| 1656 | srb->cmd->pid, dcb->target_id, dcb->target_lun); |
| 1657 | srb->state = SRB_READY; |
| 1658 | free_tag(dcb, srb); |
| 1659 | srb->msg_count = 0; |
| 1660 | return_code = 1; |
| 1661 | /* This IRQ should NOT get lost, as we did not acknowledge it */ |
| 1662 | } else { |
| 1663 | /* |
| 1664 | * If start_scsi returns 0: |
| 1665 | * we know that the SCSI processor is free |
| 1666 | */ |
| 1667 | srb->scsi_phase = PH_BUS_FREE; /* initial phase */ |
| 1668 | dcb->active_srb = srb; |
| 1669 | acb->active_dcb = dcb; |
| 1670 | return_code = 0; |
| 1671 | /* it's important for atn stop */ |
| 1672 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, |
| 1673 | DO_DATALATCH | DO_HWRESELECT); |
| 1674 | /* SCSI command */ |
| 1675 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, scsicommand); |
| 1676 | } |
| 1677 | return return_code; |
| 1678 | } |
| 1679 | |
| 1680 | |
| 1681 | #define DC395x_ENABLE_MSGOUT \ |
| 1682 | DC395x_write16 (acb, TRM_S1040_SCSI_CONTROL, DO_SETATN); \ |
| 1683 | srb->state |= SRB_MSGOUT |
| 1684 | |
| 1685 | |
| 1686 | /* abort command */ |
| 1687 | static inline void enable_msgout_abort(struct AdapterCtlBlk *acb, |
| 1688 | struct ScsiReqBlk *srb) |
| 1689 | { |
| 1690 | srb->msgout_buf[0] = ABORT; |
| 1691 | srb->msg_count = 1; |
| 1692 | DC395x_ENABLE_MSGOUT; |
| 1693 | srb->state &= ~SRB_MSGIN; |
| 1694 | srb->state |= SRB_MSGOUT; |
| 1695 | } |
| 1696 | |
| 1697 | |
| 1698 | /** |
| 1699 | * dc395x_handle_interrupt - Handle an interrupt that has been confirmed to |
| 1700 | * have been triggered for this card. |
| 1701 | * |
| 1702 | * @acb: a pointer to the adpter control block |
| 1703 | * @scsi_status: the status return when we checked the card |
| 1704 | **/ |
| 1705 | static void dc395x_handle_interrupt(struct AdapterCtlBlk *acb, |
| 1706 | u16 scsi_status) |
| 1707 | { |
| 1708 | struct DeviceCtlBlk *dcb; |
| 1709 | struct ScsiReqBlk *srb; |
| 1710 | u16 phase; |
| 1711 | u8 scsi_intstatus; |
| 1712 | unsigned long flags; |
| 1713 | void (*dc395x_statev)(struct AdapterCtlBlk *, struct ScsiReqBlk *, |
| 1714 | u16 *); |
| 1715 | |
| 1716 | DC395x_LOCK_IO(acb->scsi_host, flags); |
| 1717 | |
| 1718 | /* This acknowledges the IRQ */ |
| 1719 | scsi_intstatus = DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); |
| 1720 | if ((scsi_status & 0x2007) == 0x2002) |
| 1721 | dprintkl(KERN_DEBUG, |
| 1722 | "COP after COP completed? %04x\n", scsi_status); |
| 1723 | if (debug_enabled(DBG_KG)) { |
| 1724 | if (scsi_intstatus & INT_SELTIMEOUT) |
| 1725 | dprintkdbg(DBG_KG, "handle_interrupt: Selection timeout\n"); |
| 1726 | } |
| 1727 | /*dprintkl(KERN_DEBUG, "handle_interrupt: intstatus = 0x%02x ", scsi_intstatus); */ |
| 1728 | |
| 1729 | if (timer_pending(&acb->selto_timer)) |
| 1730 | del_timer(&acb->selto_timer); |
| 1731 | |
| 1732 | if (scsi_intstatus & (INT_SELTIMEOUT | INT_DISCONNECT)) { |
| 1733 | disconnect(acb); /* bus free interrupt */ |
| 1734 | goto out_unlock; |
| 1735 | } |
| 1736 | if (scsi_intstatus & INT_RESELECTED) { |
| 1737 | reselect(acb); |
| 1738 | goto out_unlock; |
| 1739 | } |
| 1740 | if (scsi_intstatus & INT_SELECT) { |
| 1741 | dprintkl(KERN_INFO, "Host does not support target mode!\n"); |
| 1742 | goto out_unlock; |
| 1743 | } |
| 1744 | if (scsi_intstatus & INT_SCSIRESET) { |
| 1745 | scsi_reset_detect(acb); |
| 1746 | goto out_unlock; |
| 1747 | } |
| 1748 | if (scsi_intstatus & (INT_BUSSERVICE | INT_CMDDONE)) { |
| 1749 | dcb = acb->active_dcb; |
| 1750 | if (!dcb) { |
| 1751 | dprintkl(KERN_DEBUG, |
| 1752 | "Oops: BusService (%04x %02x) w/o ActiveDCB!\n", |
| 1753 | scsi_status, scsi_intstatus); |
| 1754 | goto out_unlock; |
| 1755 | } |
| 1756 | srb = dcb->active_srb; |
| 1757 | if (dcb->flag & ABORT_DEV_) { |
| 1758 | dprintkdbg(DBG_0, "MsgOut Abort Device.....\n"); |
| 1759 | enable_msgout_abort(acb, srb); |
| 1760 | } |
| 1761 | |
| 1762 | /* software sequential machine */ |
| 1763 | phase = (u16)srb->scsi_phase; |
| 1764 | |
| 1765 | /* |
| 1766 | * 62037 or 62137 |
| 1767 | * call dc395x_scsi_phase0[]... "phase entry" |
| 1768 | * handle every phase before start transfer |
| 1769 | */ |
| 1770 | /* data_out_phase0, phase:0 */ |
| 1771 | /* data_in_phase0, phase:1 */ |
| 1772 | /* command_phase0, phase:2 */ |
| 1773 | /* status_phase0, phase:3 */ |
| 1774 | /* nop0, phase:4 PH_BUS_FREE .. initial phase */ |
| 1775 | /* nop0, phase:5 PH_BUS_FREE .. initial phase */ |
| 1776 | /* msgout_phase0, phase:6 */ |
| 1777 | /* msgin_phase0, phase:7 */ |
| 1778 | dc395x_statev = dc395x_scsi_phase0[phase]; |
| 1779 | dc395x_statev(acb, srb, &scsi_status); |
| 1780 | |
| 1781 | /* |
| 1782 | * if there were any exception occured scsi_status |
| 1783 | * will be modify to bus free phase new scsi_status |
| 1784 | * transfer out from ... previous dc395x_statev |
| 1785 | */ |
| 1786 | srb->scsi_phase = scsi_status & PHASEMASK; |
| 1787 | phase = (u16)scsi_status & PHASEMASK; |
| 1788 | |
| 1789 | /* |
| 1790 | * call dc395x_scsi_phase1[]... "phase entry" handle |
| 1791 | * every phase to do transfer |
| 1792 | */ |
| 1793 | /* data_out_phase1, phase:0 */ |
| 1794 | /* data_in_phase1, phase:1 */ |
| 1795 | /* command_phase1, phase:2 */ |
| 1796 | /* status_phase1, phase:3 */ |
| 1797 | /* nop1, phase:4 PH_BUS_FREE .. initial phase */ |
| 1798 | /* nop1, phase:5 PH_BUS_FREE .. initial phase */ |
| 1799 | /* msgout_phase1, phase:6 */ |
| 1800 | /* msgin_phase1, phase:7 */ |
| 1801 | dc395x_statev = dc395x_scsi_phase1[phase]; |
| 1802 | dc395x_statev(acb, srb, &scsi_status); |
| 1803 | } |
| 1804 | out_unlock: |
| 1805 | DC395x_UNLOCK_IO(acb->scsi_host, flags); |
| 1806 | } |
| 1807 | |
| 1808 | |
| 1809 | static irqreturn_t dc395x_interrupt(int irq, void *dev_id, |
| 1810 | struct pt_regs *regs) |
| 1811 | { |
| 1812 | struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)dev_id; |
| 1813 | u16 scsi_status; |
| 1814 | u8 dma_status; |
| 1815 | irqreturn_t handled = IRQ_NONE; |
| 1816 | |
| 1817 | /* |
| 1818 | * Check for pending interupt |
| 1819 | */ |
| 1820 | scsi_status = DC395x_read16(acb, TRM_S1040_SCSI_STATUS); |
| 1821 | dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); |
| 1822 | if (scsi_status & SCSIINTERRUPT) { |
| 1823 | /* interupt pending - let's process it! */ |
| 1824 | dc395x_handle_interrupt(acb, scsi_status); |
| 1825 | handled = IRQ_HANDLED; |
| 1826 | } |
| 1827 | else if (dma_status & 0x20) { |
| 1828 | /* Error from the DMA engine */ |
| 1829 | dprintkl(KERN_INFO, "Interrupt from DMA engine: 0x%02x!\n", dma_status); |
| 1830 | #if 0 |
| 1831 | dprintkl(KERN_INFO, "This means DMA error! Try to handle ...\n"); |
| 1832 | if (acb->active_dcb) { |
| 1833 | acb->active_dcb-> flag |= ABORT_DEV_; |
| 1834 | if (acb->active_dcb->active_srb) |
| 1835 | enable_msgout_abort(acb, acb->active_dcb->active_srb); |
| 1836 | } |
| 1837 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, ABORTXFER | CLRXFIFO); |
| 1838 | #else |
| 1839 | dprintkl(KERN_INFO, "Ignoring DMA error (probably a bad thing) ...\n"); |
| 1840 | acb = NULL; |
| 1841 | #endif |
| 1842 | handled = IRQ_HANDLED; |
| 1843 | } |
| 1844 | |
| 1845 | return handled; |
| 1846 | } |
| 1847 | |
| 1848 | |
| 1849 | static void msgout_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 1850 | u16 *pscsi_status) |
| 1851 | { |
| 1852 | dprintkdbg(DBG_0, "msgout_phase0: (pid#%li)\n", srb->cmd->pid); |
| 1853 | if (srb->state & (SRB_UNEXPECT_RESEL + SRB_ABORT_SENT)) |
| 1854 | *pscsi_status = PH_BUS_FREE; /*.. initial phase */ |
| 1855 | |
| 1856 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| 1857 | srb->state &= ~SRB_MSGOUT; |
| 1858 | } |
| 1859 | |
| 1860 | |
| 1861 | static void msgout_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 1862 | u16 *pscsi_status) |
| 1863 | { |
| 1864 | u16 i; |
| 1865 | u8 *ptr; |
| 1866 | dprintkdbg(DBG_0, "msgout_phase1: (pid#%li)\n", srb->cmd->pid); |
| 1867 | |
| 1868 | clear_fifo(acb, "msgout_phase1"); |
| 1869 | if (!(srb->state & SRB_MSGOUT)) { |
| 1870 | srb->state |= SRB_MSGOUT; |
| 1871 | dprintkl(KERN_DEBUG, |
| 1872 | "msgout_phase1: (pid#%li) Phase unexpected\n", |
| 1873 | srb->cmd->pid); /* So what ? */ |
| 1874 | } |
| 1875 | if (!srb->msg_count) { |
| 1876 | dprintkdbg(DBG_0, "msgout_phase1: (pid#%li) NOP msg\n", |
| 1877 | srb->cmd->pid); |
| 1878 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, MSG_NOP); |
| 1879 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| 1880 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); |
| 1881 | return; |
| 1882 | } |
| 1883 | ptr = (u8 *)srb->msgout_buf; |
| 1884 | for (i = 0; i < srb->msg_count; i++) |
| 1885 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr++); |
| 1886 | srb->msg_count = 0; |
| 1887 | if (srb->msgout_buf[0] == MSG_ABORT) |
| 1888 | srb->state = SRB_ABORT_SENT; |
| 1889 | |
| 1890 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); |
| 1891 | } |
| 1892 | |
| 1893 | |
| 1894 | static void command_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 1895 | u16 *pscsi_status) |
| 1896 | { |
| 1897 | dprintkdbg(DBG_0, "command_phase0: (pid#%li)\n", srb->cmd->pid); |
| 1898 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); |
| 1899 | } |
| 1900 | |
| 1901 | |
| 1902 | static void command_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 1903 | u16 *pscsi_status) |
| 1904 | { |
| 1905 | struct DeviceCtlBlk *dcb; |
| 1906 | u8 *ptr; |
| 1907 | u16 i; |
| 1908 | dprintkdbg(DBG_0, "command_phase1: (pid#%li)\n", srb->cmd->pid); |
| 1909 | |
| 1910 | clear_fifo(acb, "command_phase1"); |
| 1911 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_CLRATN); |
| 1912 | if (!(srb->flag & AUTO_REQSENSE)) { |
| 1913 | ptr = (u8 *)srb->cmd->cmnd; |
| 1914 | for (i = 0; i < srb->cmd->cmd_len; i++) { |
| 1915 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, *ptr); |
| 1916 | ptr++; |
| 1917 | } |
| 1918 | } else { |
| 1919 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, REQUEST_SENSE); |
| 1920 | dcb = acb->active_dcb; |
| 1921 | /* target id */ |
| 1922 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, (dcb->target_lun << 5)); |
| 1923 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
| 1924 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
| 1925 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, |
| 1926 | sizeof(srb->cmd->sense_buffer)); |
| 1927 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
| 1928 | } |
| 1929 | srb->state |= SRB_COMMAND; |
| 1930 | /* it's important for atn stop */ |
| 1931 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); |
| 1932 | /* SCSI command */ |
| 1933 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_OUT); |
| 1934 | } |
| 1935 | |
| 1936 | |
| 1937 | /* |
| 1938 | * Verify that the remaining space in the hw sg lists is the same as |
| 1939 | * the count of remaining bytes in srb->total_xfer_length |
| 1940 | */ |
| 1941 | static void sg_verify_length(struct ScsiReqBlk *srb) |
| 1942 | { |
| 1943 | if (debug_enabled(DBG_SG)) { |
| 1944 | unsigned len = 0; |
| 1945 | unsigned idx = srb->sg_index; |
| 1946 | struct SGentry *psge = srb->segment_x + idx; |
| 1947 | for (; idx < srb->sg_count; psge++, idx++) |
| 1948 | len += psge->length; |
| 1949 | if (len != srb->total_xfer_length) |
| 1950 | dprintkdbg(DBG_SG, |
| 1951 | "Inconsistent SRB S/G lengths (Tot=%i, Count=%i) !!\n", |
| 1952 | srb->total_xfer_length, len); |
| 1953 | } |
| 1954 | } |
| 1955 | |
| 1956 | |
| 1957 | /* |
| 1958 | * Compute the next Scatter Gather list index and adjust its length |
| 1959 | * and address if necessary; also compute virt_addr |
| 1960 | */ |
| 1961 | static void sg_update_list(struct ScsiReqBlk *srb, u32 left) |
| 1962 | { |
| 1963 | u8 idx; |
| 1964 | struct scatterlist *sg; |
| 1965 | struct scsi_cmnd *cmd = srb->cmd; |
| 1966 | int segment = cmd->use_sg; |
| 1967 | u32 xferred = srb->total_xfer_length - left; /* bytes transfered */ |
| 1968 | struct SGentry *psge = srb->segment_x + srb->sg_index; |
| 1969 | void **virt = srb->virt_map; |
| 1970 | |
| 1971 | dprintkdbg(DBG_0, |
| 1972 | "sg_update_list: Transfered %i of %i bytes, %i remain\n", |
| 1973 | xferred, srb->total_xfer_length, left); |
| 1974 | if (xferred == 0) { |
| 1975 | /* nothing to update since we did not transfer any data */ |
| 1976 | return; |
| 1977 | } |
| 1978 | |
| 1979 | sg_verify_length(srb); |
| 1980 | srb->total_xfer_length = left; /* update remaining count */ |
| 1981 | for (idx = srb->sg_index; idx < srb->sg_count; idx++) { |
| 1982 | if (xferred >= psge->length) { |
| 1983 | /* Complete SG entries done */ |
| 1984 | xferred -= psge->length; |
| 1985 | } else { |
| 1986 | /* Partial SG entry done */ |
| 1987 | psge->length -= xferred; |
| 1988 | psge->address += xferred; |
| 1989 | srb->sg_index = idx; |
| 1990 | pci_dma_sync_single_for_device(srb->dcb-> |
| 1991 | acb->dev, |
| 1992 | srb->sg_bus_addr, |
| 1993 | SEGMENTX_LEN, |
| 1994 | PCI_DMA_TODEVICE); |
| 1995 | break; |
| 1996 | } |
| 1997 | psge++; |
| 1998 | } |
| 1999 | sg_verify_length(srb); |
| 2000 | |
| 2001 | /* we need the corresponding virtual address */ |
| 2002 | if (!segment) { |
| 2003 | srb->virt_addr += xferred; |
| 2004 | return; |
| 2005 | } |
| 2006 | |
| 2007 | /* We have to walk the scatterlist to find it */ |
| 2008 | sg = (struct scatterlist *)cmd->request_buffer; |
| 2009 | idx = 0; |
| 2010 | while (segment--) { |
| 2011 | unsigned long mask = |
| 2012 | ~((unsigned long)sg->length - 1) & PAGE_MASK; |
| 2013 | if ((sg_dma_address(sg) & mask) == (psge->address & mask)) { |
| 2014 | srb->virt_addr = virt[idx] + (psge->address & ~PAGE_MASK); |
| 2015 | return; |
| 2016 | } |
| 2017 | ++sg; |
| 2018 | ++idx; |
| 2019 | } |
| 2020 | |
| 2021 | dprintkl(KERN_ERR, "sg_update_list: sg_to_virt failed\n"); |
| 2022 | srb->virt_addr = NULL; |
| 2023 | } |
| 2024 | |
| 2025 | |
| 2026 | /* |
| 2027 | * We have transfered a single byte (PIO mode?) and need to update |
| 2028 | * the count of bytes remaining (total_xfer_length) and update the sg |
| 2029 | * entry to either point to next byte in the current sg entry, or of |
| 2030 | * already at the end to point to the start of the next sg entry |
| 2031 | */ |
| 2032 | static void sg_subtract_one(struct ScsiReqBlk *srb) |
| 2033 | { |
| 2034 | srb->total_xfer_length--; |
| 2035 | srb->segment_x[srb->sg_index].length--; |
| 2036 | if (srb->total_xfer_length && |
| 2037 | !srb->segment_x[srb->sg_index].length) { |
| 2038 | if (debug_enabled(DBG_PIO)) |
| 2039 | printk(" (next segment)"); |
| 2040 | srb->sg_index++; |
| 2041 | sg_update_list(srb, srb->total_xfer_length); |
| 2042 | } |
| 2043 | } |
| 2044 | |
| 2045 | |
| 2046 | /* |
| 2047 | * cleanup_after_transfer |
| 2048 | * |
| 2049 | * Makes sure, DMA and SCSI engine are empty, after the transfer has finished |
| 2050 | * KG: Currently called from StatusPhase1 () |
| 2051 | * Should probably also be called from other places |
| 2052 | * Best might be to call it in DataXXPhase0, if new phase will differ |
| 2053 | */ |
| 2054 | static void cleanup_after_transfer(struct AdapterCtlBlk *acb, |
| 2055 | struct ScsiReqBlk *srb) |
| 2056 | { |
| 2057 | /*DC395x_write8 (TRM_S1040_DMA_STATUS, FORCEDMACOMP); */ |
| 2058 | if (DC395x_read16(acb, TRM_S1040_DMA_COMMAND) & 0x0001) { /* read */ |
| 2059 | if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) |
| 2060 | clear_fifo(acb, "cleanup/in"); |
| 2061 | if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) |
| 2062 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); |
| 2063 | } else { /* write */ |
| 2064 | if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) |
| 2065 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); |
| 2066 | if (!(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x40)) |
| 2067 | clear_fifo(acb, "cleanup/out"); |
| 2068 | } |
| 2069 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); |
| 2070 | } |
| 2071 | |
| 2072 | |
| 2073 | /* |
| 2074 | * Those no of bytes will be transfered w/ PIO through the SCSI FIFO |
| 2075 | * Seems to be needed for unknown reasons; could be a hardware bug :-( |
| 2076 | */ |
| 2077 | #define DC395x_LASTPIO 4 |
| 2078 | |
| 2079 | |
| 2080 | static void data_out_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 2081 | u16 *pscsi_status) |
| 2082 | { |
| 2083 | struct DeviceCtlBlk *dcb = srb->dcb; |
| 2084 | u16 scsi_status = *pscsi_status; |
| 2085 | u32 d_left_counter = 0; |
| 2086 | dprintkdbg(DBG_0, "data_out_phase0: (pid#%li) <%02i-%i>\n", |
| 2087 | srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); |
| 2088 | |
| 2089 | /* |
| 2090 | * KG: We need to drain the buffers before we draw any conclusions! |
| 2091 | * This means telling the DMA to push the rest into SCSI, telling |
| 2092 | * SCSI to push the rest to the bus. |
| 2093 | * However, the device might have been the one to stop us (phase |
| 2094 | * change), and the data in transit just needs to be accounted so |
| 2095 | * it can be retransmitted.) |
| 2096 | */ |
| 2097 | /* |
| 2098 | * KG: Stop DMA engine pushing more data into the SCSI FIFO |
| 2099 | * If we need more data, the DMA SG list will be freshly set up, anyway |
| 2100 | */ |
| 2101 | dprintkdbg(DBG_PIO, "data_out_phase0: " |
| 2102 | "DMA{fifcnt=0x%02x fifostat=0x%02x} " |
| 2103 | "SCSI{fifocnt=0x%02x cnt=0x%06x status=0x%04x} total=0x%06x\n", |
| 2104 | DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), |
| 2105 | DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), |
| 2106 | DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), |
| 2107 | DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), scsi_status, |
| 2108 | srb->total_xfer_length); |
| 2109 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, STOPDMAXFER | CLRXFIFO); |
| 2110 | |
| 2111 | if (!(srb->state & SRB_XFERPAD)) { |
| 2112 | if (scsi_status & PARITYERROR) |
| 2113 | srb->status |= PARITY_ERROR; |
| 2114 | |
| 2115 | /* |
| 2116 | * KG: Right, we can't just rely on the SCSI_COUNTER, because this |
| 2117 | * is the no of bytes it got from the DMA engine not the no it |
| 2118 | * transferred successfully to the device. (And the difference could |
| 2119 | * be as much as the FIFO size, I guess ...) |
| 2120 | */ |
| 2121 | if (!(scsi_status & SCSIXFERDONE)) { |
| 2122 | /* |
| 2123 | * when data transfer from DMA FIFO to SCSI FIFO |
| 2124 | * if there was some data left in SCSI FIFO |
| 2125 | */ |
| 2126 | d_left_counter = |
| 2127 | (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & |
| 2128 | 0x1F); |
| 2129 | if (dcb->sync_period & WIDE_SYNC) |
| 2130 | d_left_counter <<= 1; |
| 2131 | |
| 2132 | dprintkdbg(DBG_KG, "data_out_phase0: FIFO contains %i %s\n" |
| 2133 | "SCSI{fifocnt=0x%02x cnt=0x%08x} " |
| 2134 | "DMA{fifocnt=0x%04x cnt=0x%02x ctr=0x%08x}\n", |
| 2135 | DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), |
| 2136 | (dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", |
| 2137 | DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), |
| 2138 | DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), |
| 2139 | DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), |
| 2140 | DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), |
| 2141 | DC395x_read32(acb, TRM_S1040_DMA_CXCNT)); |
| 2142 | } |
| 2143 | /* |
| 2144 | * calculate all the residue data that not yet transfered |
| 2145 | * SCSI transfer counter + left in SCSI FIFO data |
| 2146 | * |
| 2147 | * .....TRM_S1040_SCSI_COUNTER (24bits) |
| 2148 | * The counter always decrement by one for every SCSI byte transfer. |
| 2149 | * .....TRM_S1040_SCSI_FIFOCNT ( 5bits) |
| 2150 | * The counter is SCSI FIFO offset counter (in units of bytes or! words) |
| 2151 | */ |
| 2152 | if (srb->total_xfer_length > DC395x_LASTPIO) |
| 2153 | d_left_counter += |
| 2154 | DC395x_read32(acb, TRM_S1040_SCSI_COUNTER); |
| 2155 | |
| 2156 | /* Is this a good idea? */ |
| 2157 | /*clear_fifo(acb, "DOP1"); */ |
| 2158 | /* KG: What is this supposed to be useful for? WIDE padding stuff? */ |
| 2159 | if (d_left_counter == 1 && dcb->sync_period & WIDE_SYNC |
| 2160 | && srb->cmd->request_bufflen % 2) { |
| 2161 | d_left_counter = 0; |
| 2162 | dprintkl(KERN_INFO, |
| 2163 | "data_out_phase0: Discard 1 byte (0x%02x)\n", |
| 2164 | scsi_status); |
| 2165 | } |
| 2166 | /* |
| 2167 | * KG: Oops again. Same thinko as above: The SCSI might have been |
| 2168 | * faster than the DMA engine, so that it ran out of data. |
| 2169 | * In that case, we have to do just nothing! |
| 2170 | * But: Why the interrupt: No phase change. No XFERCNT_2_ZERO. Or? |
| 2171 | */ |
| 2172 | /* |
| 2173 | * KG: This is nonsense: We have been WRITING data to the bus |
| 2174 | * If the SCSI engine has no bytes left, how should the DMA engine? |
| 2175 | */ |
| 2176 | if (d_left_counter == 0) { |
| 2177 | srb->total_xfer_length = 0; |
| 2178 | } else { |
| 2179 | /* |
| 2180 | * if transfer not yet complete |
| 2181 | * there were some data residue in SCSI FIFO or |
| 2182 | * SCSI transfer counter not empty |
| 2183 | */ |
| 2184 | long oldxferred = |
| 2185 | srb->total_xfer_length - d_left_counter; |
| 2186 | const int diff = |
| 2187 | (dcb->sync_period & WIDE_SYNC) ? 2 : 1; |
| 2188 | sg_update_list(srb, d_left_counter); |
| 2189 | /* KG: Most ugly hack! Apparently, this works around a chip bug */ |
| 2190 | if ((srb->segment_x[srb->sg_index].length == |
| 2191 | diff && srb->cmd->use_sg) |
| 2192 | || ((oldxferred & ~PAGE_MASK) == |
| 2193 | (PAGE_SIZE - diff)) |
| 2194 | ) { |
| 2195 | dprintkl(KERN_INFO, "data_out_phase0: " |
| 2196 | "Work around chip bug (%i)?\n", diff); |
| 2197 | d_left_counter = |
| 2198 | srb->total_xfer_length - diff; |
| 2199 | sg_update_list(srb, d_left_counter); |
| 2200 | /*srb->total_xfer_length -= diff; */ |
| 2201 | /*srb->virt_addr += diff; */ |
| 2202 | /*if (srb->cmd->use_sg) */ |
| 2203 | /* srb->sg_index++; */ |
| 2204 | } |
| 2205 | } |
| 2206 | } |
| 2207 | if ((*pscsi_status & PHASEMASK) != PH_DATA_OUT) { |
| 2208 | cleanup_after_transfer(acb, srb); |
| 2209 | } |
| 2210 | } |
| 2211 | |
| 2212 | |
| 2213 | static void data_out_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 2214 | u16 *pscsi_status) |
| 2215 | { |
| 2216 | dprintkdbg(DBG_0, "data_out_phase1: (pid#%li) <%02i-%i>\n", |
| 2217 | srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); |
| 2218 | clear_fifo(acb, "data_out_phase1"); |
| 2219 | /* do prepare before transfer when data out phase */ |
| 2220 | data_io_transfer(acb, srb, XFERDATAOUT); |
| 2221 | } |
| 2222 | |
| 2223 | |
| 2224 | static void data_in_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 2225 | u16 *pscsi_status) |
| 2226 | { |
| 2227 | u16 scsi_status = *pscsi_status; |
| 2228 | u32 d_left_counter = 0; |
| 2229 | dprintkdbg(DBG_0, "data_in_phase0: (pid#%li) <%02i-%i>\n", |
| 2230 | srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); |
| 2231 | |
| 2232 | /* |
| 2233 | * KG: DataIn is much more tricky than DataOut. When the device is finished |
| 2234 | * and switches to another phase, the SCSI engine should be finished too. |
| 2235 | * But: There might still be bytes left in its FIFO to be fetched by the DMA |
| 2236 | * engine and transferred to memory. |
| 2237 | * We should wait for the FIFOs to be emptied by that (is there any way to |
| 2238 | * enforce this?) and then stop the DMA engine, because it might think, that |
| 2239 | * there are more bytes to follow. Yes, the device might disconnect prior to |
| 2240 | * having all bytes transferred! |
| 2241 | * Also we should make sure that all data from the DMA engine buffer's really |
| 2242 | * made its way to the system memory! Some documentation on this would not |
| 2243 | * seem to be a bad idea, actually. |
| 2244 | */ |
| 2245 | if (!(srb->state & SRB_XFERPAD)) { |
| 2246 | if (scsi_status & PARITYERROR) { |
| 2247 | dprintkl(KERN_INFO, "data_in_phase0: (pid#%li) " |
| 2248 | "Parity Error\n", srb->cmd->pid); |
| 2249 | srb->status |= PARITY_ERROR; |
| 2250 | } |
| 2251 | /* |
| 2252 | * KG: We should wait for the DMA FIFO to be empty ... |
| 2253 | * but: it would be better to wait first for the SCSI FIFO and then the |
| 2254 | * the DMA FIFO to become empty? How do we know, that the device not already |
| 2255 | * sent data to the FIFO in a MsgIn phase, eg.? |
| 2256 | */ |
| 2257 | if (!(DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT) & 0x80)) { |
| 2258 | #if 0 |
| 2259 | int ctr = 6000000; |
| 2260 | dprintkl(KERN_DEBUG, |
| 2261 | "DIP0: Wait for DMA FIFO to flush ...\n"); |
| 2262 | /*DC395x_write8 (TRM_S1040_DMA_CONTROL, STOPDMAXFER); */ |
| 2263 | /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 7); */ |
| 2264 | /*DC395x_write8 (TRM_S1040_SCSI_COMMAND, SCMD_DMA_IN); */ |
| 2265 | while (! |
| 2266 | (DC395x_read16(acb, TRM_S1040_DMA_FIFOSTAT) & |
| 2267 | 0x80) && --ctr); |
| 2268 | if (ctr < 6000000 - 1) |
| 2269 | dprintkl(KERN_DEBUG |
| 2270 | "DIP0: Had to wait for DMA ...\n"); |
| 2271 | if (!ctr) |
| 2272 | dprintkl(KERN_ERR, |
| 2273 | "Deadlock in DIP0 waiting for DMA FIFO empty!!\n"); |
| 2274 | /*DC395x_write32 (TRM_S1040_SCSI_COUNTER, 0); */ |
| 2275 | #endif |
| 2276 | dprintkdbg(DBG_KG, "data_in_phase0: " |
| 2277 | "DMA{fifocnt=0x%02x fifostat=0x%02x}\n", |
| 2278 | DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), |
| 2279 | DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT)); |
| 2280 | } |
| 2281 | /* Now: Check remainig data: The SCSI counters should tell us ... */ |
| 2282 | d_left_counter = DC395x_read32(acb, TRM_S1040_SCSI_COUNTER) |
| 2283 | + ((DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x1f) |
| 2284 | << ((srb->dcb->sync_period & WIDE_SYNC) ? 1 : |
| 2285 | 0)); |
| 2286 | dprintkdbg(DBG_KG, "data_in_phase0: " |
| 2287 | "SCSI{fifocnt=0x%02x%s ctr=0x%08x} " |
| 2288 | "DMA{fifocnt=0x%02x fifostat=0x%02x ctr=0x%08x} " |
| 2289 | "Remain{totxfer=%i scsi_fifo+ctr=%i}\n", |
| 2290 | DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT), |
| 2291 | (srb->dcb->sync_period & WIDE_SYNC) ? "words" : "bytes", |
| 2292 | DC395x_read32(acb, TRM_S1040_SCSI_COUNTER), |
| 2293 | DC395x_read8(acb, TRM_S1040_DMA_FIFOCNT), |
| 2294 | DC395x_read8(acb, TRM_S1040_DMA_FIFOSTAT), |
| 2295 | DC395x_read32(acb, TRM_S1040_DMA_CXCNT), |
| 2296 | srb->total_xfer_length, d_left_counter); |
| 2297 | #if DC395x_LASTPIO |
| 2298 | /* KG: Less than or equal to 4 bytes can not be transfered via DMA, it seems. */ |
| 2299 | if (d_left_counter |
| 2300 | && srb->total_xfer_length <= DC395x_LASTPIO) { |
| 2301 | /*u32 addr = (srb->segment_x[srb->sg_index].address); */ |
| 2302 | /*sg_update_list (srb, d_left_counter); */ |
| 2303 | dprintkdbg(DBG_PIO, "data_in_phase0: PIO (%i %s) to " |
| 2304 | "%p for remaining %i bytes:", |
| 2305 | DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & 0x1f, |
| 2306 | (srb->dcb->sync_period & WIDE_SYNC) ? |
| 2307 | "words" : "bytes", |
| 2308 | srb->virt_addr, |
| 2309 | srb->total_xfer_length); |
| 2310 | if (srb->dcb->sync_period & WIDE_SYNC) |
| 2311 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, |
| 2312 | CFG2_WIDEFIFO); |
| 2313 | while (DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) != 0x40) { |
| 2314 | u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
| 2315 | *(srb->virt_addr)++ = byte; |
| 2316 | if (debug_enabled(DBG_PIO)) |
| 2317 | printk(" %02x", byte); |
| 2318 | d_left_counter--; |
| 2319 | sg_subtract_one(srb); |
| 2320 | } |
| 2321 | if (srb->dcb->sync_period & WIDE_SYNC) { |
| 2322 | #if 1 |
| 2323 | /* Read the last byte ... */ |
| 2324 | if (srb->total_xfer_length > 0) { |
| 2325 | u8 byte = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
| 2326 | *(srb->virt_addr)++ = byte; |
| 2327 | srb->total_xfer_length--; |
| 2328 | if (debug_enabled(DBG_PIO)) |
| 2329 | printk(" %02x", byte); |
| 2330 | } |
| 2331 | #endif |
| 2332 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); |
| 2333 | } |
| 2334 | /*printk(" %08x", *(u32*)(bus_to_virt (addr))); */ |
| 2335 | /*srb->total_xfer_length = 0; */ |
| 2336 | if (debug_enabled(DBG_PIO)) |
| 2337 | printk("\n"); |
| 2338 | } |
| 2339 | #endif /* DC395x_LASTPIO */ |
| 2340 | |
| 2341 | #if 0 |
| 2342 | /* |
| 2343 | * KG: This was in DATAOUT. Does it also belong here? |
| 2344 | * Nobody seems to know what counter and fifo_cnt count exactly ... |
| 2345 | */ |
| 2346 | if (!(scsi_status & SCSIXFERDONE)) { |
| 2347 | /* |
| 2348 | * when data transfer from DMA FIFO to SCSI FIFO |
| 2349 | * if there was some data left in SCSI FIFO |
| 2350 | */ |
| 2351 | d_left_counter = |
| 2352 | (u32)(DC395x_read8(acb, TRM_S1040_SCSI_FIFOCNT) & |
| 2353 | 0x1F); |
| 2354 | if (srb->dcb->sync_period & WIDE_SYNC) |
| 2355 | d_left_counter <<= 1; |
| 2356 | /* |
| 2357 | * if WIDE scsi SCSI FIFOCNT unit is word !!! |
| 2358 | * so need to *= 2 |
| 2359 | * KG: Seems to be correct ... |
| 2360 | */ |
| 2361 | } |
| 2362 | #endif |
| 2363 | /* KG: This should not be needed any more! */ |
| 2364 | if (d_left_counter == 0 |
| 2365 | || (scsi_status & SCSIXFERCNT_2_ZERO)) { |
| 2366 | #if 0 |
| 2367 | int ctr = 6000000; |
| 2368 | u8 TempDMAstatus; |
| 2369 | do { |
| 2370 | TempDMAstatus = |
| 2371 | DC395x_read8(acb, TRM_S1040_DMA_STATUS); |
| 2372 | } while (!(TempDMAstatus & DMAXFERCOMP) && --ctr); |
| 2373 | if (!ctr) |
| 2374 | dprintkl(KERN_ERR, |
| 2375 | "Deadlock in DataInPhase0 waiting for DMA!!\n"); |
| 2376 | srb->total_xfer_length = 0; |
| 2377 | #endif |
| 2378 | srb->total_xfer_length = d_left_counter; |
| 2379 | } else { /* phase changed */ |
| 2380 | /* |
| 2381 | * parsing the case: |
| 2382 | * when a transfer not yet complete |
| 2383 | * but be disconnected by target |
| 2384 | * if transfer not yet complete |
| 2385 | * there were some data residue in SCSI FIFO or |
| 2386 | * SCSI transfer counter not empty |
| 2387 | */ |
| 2388 | sg_update_list(srb, d_left_counter); |
| 2389 | } |
| 2390 | } |
| 2391 | /* KG: The target may decide to disconnect: Empty FIFO before! */ |
| 2392 | if ((*pscsi_status & PHASEMASK) != PH_DATA_IN) { |
| 2393 | cleanup_after_transfer(acb, srb); |
| 2394 | } |
| 2395 | } |
| 2396 | |
| 2397 | |
| 2398 | static void data_in_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 2399 | u16 *pscsi_status) |
| 2400 | { |
| 2401 | dprintkdbg(DBG_0, "data_in_phase1: (pid#%li) <%02i-%i>\n", |
| 2402 | srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); |
| 2403 | data_io_transfer(acb, srb, XFERDATAIN); |
| 2404 | } |
| 2405 | |
| 2406 | |
| 2407 | static void data_io_transfer(struct AdapterCtlBlk *acb, |
| 2408 | struct ScsiReqBlk *srb, u16 io_dir) |
| 2409 | { |
| 2410 | struct DeviceCtlBlk *dcb = srb->dcb; |
| 2411 | u8 bval; |
| 2412 | dprintkdbg(DBG_0, |
| 2413 | "data_io_transfer: (pid#%li) <%02i-%i> %c len=%i, sg=(%i/%i)\n", |
| 2414 | srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun, |
| 2415 | ((io_dir & DMACMD_DIR) ? 'r' : 'w'), |
| 2416 | srb->total_xfer_length, srb->sg_index, srb->sg_count); |
| 2417 | if (srb == acb->tmp_srb) |
| 2418 | dprintkl(KERN_ERR, "data_io_transfer: Using tmp_srb!\n"); |
| 2419 | if (srb->sg_index >= srb->sg_count) { |
| 2420 | /* can't happen? out of bounds error */ |
| 2421 | return; |
| 2422 | } |
| 2423 | |
| 2424 | if (srb->total_xfer_length > DC395x_LASTPIO) { |
| 2425 | u8 dma_status = DC395x_read8(acb, TRM_S1040_DMA_STATUS); |
| 2426 | /* |
| 2427 | * KG: What should we do: Use SCSI Cmd 0x90/0x92? |
| 2428 | * Maybe, even ABORTXFER would be appropriate |
| 2429 | */ |
| 2430 | if (dma_status & XFERPENDING) { |
| 2431 | dprintkl(KERN_DEBUG, "data_io_transfer: Xfer pending! " |
| 2432 | "Expect trouble!\n"); |
| 2433 | dump_register_info(acb, dcb, srb); |
| 2434 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, CLRXFIFO); |
| 2435 | } |
| 2436 | /* clear_fifo(acb, "IO"); */ |
| 2437 | /* |
| 2438 | * load what physical address of Scatter/Gather list table |
| 2439 | * want to be transfer |
| 2440 | */ |
| 2441 | srb->state |= SRB_DATA_XFER; |
| 2442 | DC395x_write32(acb, TRM_S1040_DMA_XHIGHADDR, 0); |
| 2443 | if (srb->cmd->use_sg) { /* with S/G */ |
| 2444 | io_dir |= DMACMD_SG; |
| 2445 | DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, |
| 2446 | srb->sg_bus_addr + |
| 2447 | sizeof(struct SGentry) * |
| 2448 | srb->sg_index); |
| 2449 | /* load how many bytes in the sg list table */ |
| 2450 | DC395x_write32(acb, TRM_S1040_DMA_XCNT, |
| 2451 | ((u32)(srb->sg_count - |
| 2452 | srb->sg_index) << 3)); |
| 2453 | } else { /* without S/G */ |
| 2454 | io_dir &= ~DMACMD_SG; |
| 2455 | DC395x_write32(acb, TRM_S1040_DMA_XLOWADDR, |
| 2456 | srb->segment_x[0].address); |
| 2457 | DC395x_write32(acb, TRM_S1040_DMA_XCNT, |
| 2458 | srb->segment_x[0].length); |
| 2459 | } |
| 2460 | /* load total transfer length (24bits) max value 16Mbyte */ |
| 2461 | DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, |
| 2462 | srb->total_xfer_length); |
| 2463 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| 2464 | if (io_dir & DMACMD_DIR) { /* read */ |
| 2465 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, |
| 2466 | SCMD_DMA_IN); |
| 2467 | DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); |
| 2468 | } else { |
| 2469 | DC395x_write16(acb, TRM_S1040_DMA_COMMAND, io_dir); |
| 2470 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, |
| 2471 | SCMD_DMA_OUT); |
| 2472 | } |
| 2473 | |
| 2474 | } |
| 2475 | #if DC395x_LASTPIO |
| 2476 | else if (srb->total_xfer_length > 0) { /* The last four bytes: Do PIO */ |
| 2477 | /* |
| 2478 | * load what physical address of Scatter/Gather list table |
| 2479 | * want to be transfer |
| 2480 | */ |
| 2481 | srb->state |= SRB_DATA_XFER; |
| 2482 | /* load total transfer length (24bits) max value 16Mbyte */ |
| 2483 | DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, |
| 2484 | srb->total_xfer_length); |
| 2485 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| 2486 | if (io_dir & DMACMD_DIR) { /* read */ |
| 2487 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, |
| 2488 | SCMD_FIFO_IN); |
| 2489 | } else { /* write */ |
| 2490 | int ln = srb->total_xfer_length; |
| 2491 | if (srb->dcb->sync_period & WIDE_SYNC) |
| 2492 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, |
| 2493 | CFG2_WIDEFIFO); |
| 2494 | dprintkdbg(DBG_PIO, |
| 2495 | "data_io_transfer: PIO %i bytes from %p:", |
| 2496 | srb->total_xfer_length, srb->virt_addr); |
| 2497 | |
| 2498 | while (srb->total_xfer_length) { |
| 2499 | if (debug_enabled(DBG_PIO)) |
| 2500 | printk(" %02x", (unsigned char) *(srb->virt_addr)); |
| 2501 | |
| 2502 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, |
| 2503 | *(srb->virt_addr)++); |
| 2504 | |
| 2505 | sg_subtract_one(srb); |
| 2506 | } |
| 2507 | if (srb->dcb->sync_period & WIDE_SYNC) { |
| 2508 | if (ln % 2) { |
| 2509 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 0); |
| 2510 | if (debug_enabled(DBG_PIO)) |
| 2511 | printk(" |00"); |
| 2512 | } |
| 2513 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); |
| 2514 | } |
| 2515 | /*DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, ln); */ |
| 2516 | if (debug_enabled(DBG_PIO)) |
| 2517 | printk("\n"); |
| 2518 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, |
| 2519 | SCMD_FIFO_OUT); |
| 2520 | } |
| 2521 | } |
| 2522 | #endif /* DC395x_LASTPIO */ |
| 2523 | else { /* xfer pad */ |
| 2524 | u8 data = 0, data2 = 0; |
| 2525 | if (srb->sg_count) { |
| 2526 | srb->adapter_status = H_OVER_UNDER_RUN; |
| 2527 | srb->status |= OVER_RUN; |
| 2528 | } |
| 2529 | /* |
| 2530 | * KG: despite the fact that we are using 16 bits I/O ops |
| 2531 | * the SCSI FIFO is only 8 bits according to the docs |
| 2532 | * (we can set bit 1 in 0x8f to serialize FIFO access ...) |
| 2533 | */ |
| 2534 | if (dcb->sync_period & WIDE_SYNC) { |
| 2535 | DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 2); |
| 2536 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, |
| 2537 | CFG2_WIDEFIFO); |
| 2538 | if (io_dir & DMACMD_DIR) { |
| 2539 | data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
| 2540 | data2 = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
| 2541 | } else { |
| 2542 | /* Danger, Robinson: If you find KGs |
| 2543 | * scattered over the wide disk, the driver |
| 2544 | * or chip is to blame :-( */ |
| 2545 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); |
| 2546 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'G'); |
| 2547 | } |
| 2548 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG2, 0); |
| 2549 | } else { |
| 2550 | DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); |
| 2551 | /* Danger, Robinson: If you find a collection of Ks on your disk |
| 2552 | * something broke :-( */ |
| 2553 | if (io_dir & DMACMD_DIR) |
| 2554 | data = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
| 2555 | else |
| 2556 | DC395x_write8(acb, TRM_S1040_SCSI_FIFO, 'K'); |
| 2557 | } |
| 2558 | srb->state |= SRB_XFERPAD; |
| 2559 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| 2560 | /* SCSI command */ |
| 2561 | bval = (io_dir & DMACMD_DIR) ? SCMD_FIFO_IN : SCMD_FIFO_OUT; |
| 2562 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, bval); |
| 2563 | } |
| 2564 | } |
| 2565 | |
| 2566 | |
| 2567 | static void status_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 2568 | u16 *pscsi_status) |
| 2569 | { |
| 2570 | dprintkdbg(DBG_0, "status_phase0: (pid#%li) <%02i-%i>\n", |
| 2571 | srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); |
| 2572 | srb->target_status = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
| 2573 | srb->end_message = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); /* get message */ |
| 2574 | srb->state = SRB_COMPLETED; |
| 2575 | *pscsi_status = PH_BUS_FREE; /*.. initial phase */ |
| 2576 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| 2577 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); |
| 2578 | } |
| 2579 | |
| 2580 | |
| 2581 | static void status_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 2582 | u16 *pscsi_status) |
| 2583 | { |
| 2584 | dprintkdbg(DBG_0, "status_phase1: (pid#%li) <%02i-%i>\n", |
| 2585 | srb->cmd->pid, srb->cmd->device->id, srb->cmd->device->lun); |
| 2586 | srb->state = SRB_STATUS; |
| 2587 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| 2588 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_COMP); |
| 2589 | } |
| 2590 | |
| 2591 | |
| 2592 | /* Check if the message is complete */ |
| 2593 | static inline u8 msgin_completed(u8 * msgbuf, u32 len) |
| 2594 | { |
| 2595 | if (*msgbuf == EXTENDED_MESSAGE) { |
| 2596 | if (len < 2) |
| 2597 | return 0; |
| 2598 | if (len < msgbuf[1] + 2) |
| 2599 | return 0; |
| 2600 | } else if (*msgbuf >= 0x20 && *msgbuf <= 0x2f) /* two byte messages */ |
| 2601 | if (len < 2) |
| 2602 | return 0; |
| 2603 | return 1; |
| 2604 | } |
| 2605 | |
| 2606 | /* reject_msg */ |
| 2607 | static inline void msgin_reject(struct AdapterCtlBlk *acb, |
| 2608 | struct ScsiReqBlk *srb) |
| 2609 | { |
| 2610 | srb->msgout_buf[0] = MESSAGE_REJECT; |
| 2611 | srb->msg_count = 1; |
| 2612 | DC395x_ENABLE_MSGOUT; |
| 2613 | srb->state &= ~SRB_MSGIN; |
| 2614 | srb->state |= SRB_MSGOUT; |
| 2615 | dprintkl(KERN_INFO, "msgin_reject: 0x%02x <%02i-%i>\n", |
| 2616 | srb->msgin_buf[0], |
| 2617 | srb->dcb->target_id, srb->dcb->target_lun); |
| 2618 | } |
| 2619 | |
| 2620 | |
| 2621 | static struct ScsiReqBlk *msgin_qtag(struct AdapterCtlBlk *acb, |
| 2622 | struct DeviceCtlBlk *dcb, u8 tag) |
| 2623 | { |
| 2624 | struct ScsiReqBlk *srb = NULL; |
| 2625 | struct ScsiReqBlk *i; |
| 2626 | dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) tag=%i srb=%p\n", |
| 2627 | srb->cmd->pid, tag, srb); |
| 2628 | |
| 2629 | if (!(dcb->tag_mask & (1 << tag))) |
| 2630 | dprintkl(KERN_DEBUG, |
| 2631 | "msgin_qtag: tag_mask=0x%08x does not reserve tag %i!\n", |
| 2632 | dcb->tag_mask, tag); |
| 2633 | |
| 2634 | if (list_empty(&dcb->srb_going_list)) |
| 2635 | goto mingx0; |
| 2636 | list_for_each_entry(i, &dcb->srb_going_list, list) { |
| 2637 | if (i->tag_number == tag) { |
| 2638 | srb = i; |
| 2639 | break; |
| 2640 | } |
| 2641 | } |
| 2642 | if (!srb) |
| 2643 | goto mingx0; |
| 2644 | |
| 2645 | dprintkdbg(DBG_0, "msgin_qtag: (pid#%li) <%02i-%i>\n", |
| 2646 | srb->cmd->pid, srb->dcb->target_id, srb->dcb->target_lun); |
| 2647 | if (dcb->flag & ABORT_DEV_) { |
| 2648 | /*srb->state = SRB_ABORT_SENT; */ |
| 2649 | enable_msgout_abort(acb, srb); |
| 2650 | } |
| 2651 | |
| 2652 | if (!(srb->state & SRB_DISCONNECT)) |
| 2653 | goto mingx0; |
| 2654 | |
| 2655 | memcpy(srb->msgin_buf, dcb->active_srb->msgin_buf, acb->msg_len); |
| 2656 | srb->state |= dcb->active_srb->state; |
| 2657 | srb->state |= SRB_DATA_XFER; |
| 2658 | dcb->active_srb = srb; |
| 2659 | /* How can we make the DORS happy? */ |
| 2660 | return srb; |
| 2661 | |
| 2662 | mingx0: |
| 2663 | srb = acb->tmp_srb; |
| 2664 | srb->state = SRB_UNEXPECT_RESEL; |
| 2665 | dcb->active_srb = srb; |
| 2666 | srb->msgout_buf[0] = MSG_ABORT_TAG; |
| 2667 | srb->msg_count = 1; |
| 2668 | DC395x_ENABLE_MSGOUT; |
| 2669 | dprintkl(KERN_DEBUG, "msgin_qtag: Unknown tag %i - abort\n", tag); |
| 2670 | return srb; |
| 2671 | } |
| 2672 | |
| 2673 | |
| 2674 | static inline void reprogram_regs(struct AdapterCtlBlk *acb, |
| 2675 | struct DeviceCtlBlk *dcb) |
| 2676 | { |
| 2677 | DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); |
| 2678 | DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); |
| 2679 | DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); |
| 2680 | set_xfer_rate(acb, dcb); |
| 2681 | } |
| 2682 | |
| 2683 | |
| 2684 | /* set async transfer mode */ |
| 2685 | static void msgin_set_async(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) |
| 2686 | { |
| 2687 | struct DeviceCtlBlk *dcb = srb->dcb; |
| 2688 | dprintkl(KERN_DEBUG, "msgin_set_async: No sync transfers <%02i-%i>\n", |
| 2689 | dcb->target_id, dcb->target_lun); |
| 2690 | |
| 2691 | dcb->sync_mode &= ~(SYNC_NEGO_ENABLE); |
| 2692 | dcb->sync_mode |= SYNC_NEGO_DONE; |
| 2693 | /*dcb->sync_period &= 0; */ |
| 2694 | dcb->sync_offset = 0; |
| 2695 | dcb->min_nego_period = 200 >> 2; /* 200ns <=> 5 MHz */ |
| 2696 | srb->state &= ~SRB_DO_SYNC_NEGO; |
| 2697 | reprogram_regs(acb, dcb); |
| 2698 | if ((dcb->sync_mode & WIDE_NEGO_ENABLE) |
| 2699 | && !(dcb->sync_mode & WIDE_NEGO_DONE)) { |
| 2700 | build_wdtr(acb, dcb, srb); |
| 2701 | DC395x_ENABLE_MSGOUT; |
| 2702 | dprintkdbg(DBG_0, "msgin_set_async(rej): Try WDTR anyway\n"); |
| 2703 | } |
| 2704 | } |
| 2705 | |
| 2706 | |
| 2707 | /* set sync transfer mode */ |
| 2708 | static void msgin_set_sync(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) |
| 2709 | { |
| 2710 | struct DeviceCtlBlk *dcb = srb->dcb; |
| 2711 | u8 bval; |
| 2712 | int fact; |
| 2713 | dprintkdbg(DBG_1, "msgin_set_sync: <%02i> Sync: %ins " |
| 2714 | "(%02i.%01i MHz) Offset %i\n", |
| 2715 | dcb->target_id, srb->msgin_buf[3] << 2, |
| 2716 | (250 / srb->msgin_buf[3]), |
| 2717 | ((250 % srb->msgin_buf[3]) * 10) / srb->msgin_buf[3], |
| 2718 | srb->msgin_buf[4]); |
| 2719 | |
| 2720 | if (srb->msgin_buf[4] > 15) |
| 2721 | srb->msgin_buf[4] = 15; |
| 2722 | if (!(dcb->dev_mode & NTC_DO_SYNC_NEGO)) |
| 2723 | dcb->sync_offset = 0; |
| 2724 | else if (dcb->sync_offset == 0) |
| 2725 | dcb->sync_offset = srb->msgin_buf[4]; |
| 2726 | if (srb->msgin_buf[4] > dcb->sync_offset) |
| 2727 | srb->msgin_buf[4] = dcb->sync_offset; |
| 2728 | else |
| 2729 | dcb->sync_offset = srb->msgin_buf[4]; |
| 2730 | bval = 0; |
| 2731 | while (bval < 7 && (srb->msgin_buf[3] > clock_period[bval] |
| 2732 | || dcb->min_nego_period > |
| 2733 | clock_period[bval])) |
| 2734 | bval++; |
| 2735 | if (srb->msgin_buf[3] < clock_period[bval]) |
| 2736 | dprintkl(KERN_INFO, |
| 2737 | "msgin_set_sync: Increase sync nego period to %ins\n", |
| 2738 | clock_period[bval] << 2); |
| 2739 | srb->msgin_buf[3] = clock_period[bval]; |
| 2740 | dcb->sync_period &= 0xf0; |
| 2741 | dcb->sync_period |= ALT_SYNC | bval; |
| 2742 | dcb->min_nego_period = srb->msgin_buf[3]; |
| 2743 | |
| 2744 | if (dcb->sync_period & WIDE_SYNC) |
| 2745 | fact = 500; |
| 2746 | else |
| 2747 | fact = 250; |
| 2748 | |
| 2749 | dprintkl(KERN_INFO, |
| 2750 | "Target %02i: %s Sync: %ins Offset %i (%02i.%01i MB/s)\n", |
| 2751 | dcb->target_id, (fact == 500) ? "Wide16" : "", |
| 2752 | dcb->min_nego_period << 2, dcb->sync_offset, |
| 2753 | (fact / dcb->min_nego_period), |
| 2754 | ((fact % dcb->min_nego_period) * 10 + |
| 2755 | dcb->min_nego_period / 2) / dcb->min_nego_period); |
| 2756 | |
| 2757 | if (!(srb->state & SRB_DO_SYNC_NEGO)) { |
| 2758 | /* Reply with corrected SDTR Message */ |
| 2759 | dprintkl(KERN_DEBUG, "msgin_set_sync: answer w/%ins %i\n", |
| 2760 | srb->msgin_buf[3] << 2, srb->msgin_buf[4]); |
| 2761 | |
| 2762 | memcpy(srb->msgout_buf, srb->msgin_buf, 5); |
| 2763 | srb->msg_count = 5; |
| 2764 | DC395x_ENABLE_MSGOUT; |
| 2765 | dcb->sync_mode |= SYNC_NEGO_DONE; |
| 2766 | } else { |
| 2767 | if ((dcb->sync_mode & WIDE_NEGO_ENABLE) |
| 2768 | && !(dcb->sync_mode & WIDE_NEGO_DONE)) { |
| 2769 | build_wdtr(acb, dcb, srb); |
| 2770 | DC395x_ENABLE_MSGOUT; |
| 2771 | dprintkdbg(DBG_0, "msgin_set_sync: Also try WDTR\n"); |
| 2772 | } |
| 2773 | } |
| 2774 | srb->state &= ~SRB_DO_SYNC_NEGO; |
| 2775 | dcb->sync_mode |= SYNC_NEGO_DONE | SYNC_NEGO_ENABLE; |
| 2776 | |
| 2777 | reprogram_regs(acb, dcb); |
| 2778 | } |
| 2779 | |
| 2780 | |
| 2781 | static inline void msgin_set_nowide(struct AdapterCtlBlk *acb, |
| 2782 | struct ScsiReqBlk *srb) |
| 2783 | { |
| 2784 | struct DeviceCtlBlk *dcb = srb->dcb; |
| 2785 | dprintkdbg(DBG_1, "msgin_set_nowide: <%02i>\n", dcb->target_id); |
| 2786 | |
| 2787 | dcb->sync_period &= ~WIDE_SYNC; |
| 2788 | dcb->sync_mode &= ~(WIDE_NEGO_ENABLE); |
| 2789 | dcb->sync_mode |= WIDE_NEGO_DONE; |
| 2790 | srb->state &= ~SRB_DO_WIDE_NEGO; |
| 2791 | reprogram_regs(acb, dcb); |
| 2792 | if ((dcb->sync_mode & SYNC_NEGO_ENABLE) |
| 2793 | && !(dcb->sync_mode & SYNC_NEGO_DONE)) { |
| 2794 | build_sdtr(acb, dcb, srb); |
| 2795 | DC395x_ENABLE_MSGOUT; |
| 2796 | dprintkdbg(DBG_0, "msgin_set_nowide: Rejected. Try SDTR anyway\n"); |
| 2797 | } |
| 2798 | } |
| 2799 | |
| 2800 | static void msgin_set_wide(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) |
| 2801 | { |
| 2802 | struct DeviceCtlBlk *dcb = srb->dcb; |
| 2803 | u8 wide = (dcb->dev_mode & NTC_DO_WIDE_NEGO |
| 2804 | && acb->config & HCC_WIDE_CARD) ? 1 : 0; |
| 2805 | dprintkdbg(DBG_1, "msgin_set_wide: <%02i>\n", dcb->target_id); |
| 2806 | |
| 2807 | if (srb->msgin_buf[3] > wide) |
| 2808 | srb->msgin_buf[3] = wide; |
| 2809 | /* Completed */ |
| 2810 | if (!(srb->state & SRB_DO_WIDE_NEGO)) { |
| 2811 | dprintkl(KERN_DEBUG, |
| 2812 | "msgin_set_wide: Wide nego initiated <%02i>\n", |
| 2813 | dcb->target_id); |
| 2814 | memcpy(srb->msgout_buf, srb->msgin_buf, 4); |
| 2815 | srb->msg_count = 4; |
| 2816 | srb->state |= SRB_DO_WIDE_NEGO; |
| 2817 | DC395x_ENABLE_MSGOUT; |
| 2818 | } |
| 2819 | |
| 2820 | dcb->sync_mode |= (WIDE_NEGO_ENABLE | WIDE_NEGO_DONE); |
| 2821 | if (srb->msgin_buf[3] > 0) |
| 2822 | dcb->sync_period |= WIDE_SYNC; |
| 2823 | else |
| 2824 | dcb->sync_period &= ~WIDE_SYNC; |
| 2825 | srb->state &= ~SRB_DO_WIDE_NEGO; |
| 2826 | /*dcb->sync_mode &= ~(WIDE_NEGO_ENABLE+WIDE_NEGO_DONE); */ |
| 2827 | dprintkdbg(DBG_1, |
| 2828 | "msgin_set_wide: Wide (%i bit) negotiated <%02i>\n", |
| 2829 | (8 << srb->msgin_buf[3]), dcb->target_id); |
| 2830 | reprogram_regs(acb, dcb); |
| 2831 | if ((dcb->sync_mode & SYNC_NEGO_ENABLE) |
| 2832 | && !(dcb->sync_mode & SYNC_NEGO_DONE)) { |
| 2833 | build_sdtr(acb, dcb, srb); |
| 2834 | DC395x_ENABLE_MSGOUT; |
| 2835 | dprintkdbg(DBG_0, "msgin_set_wide: Also try SDTR.\n"); |
| 2836 | } |
| 2837 | } |
| 2838 | |
| 2839 | |
| 2840 | /* |
| 2841 | * extended message codes: |
| 2842 | * |
| 2843 | * code description |
| 2844 | * |
| 2845 | * 02h Reserved |
| 2846 | * 00h MODIFY DATA POINTER |
| 2847 | * 01h SYNCHRONOUS DATA TRANSFER REQUEST |
| 2848 | * 03h WIDE DATA TRANSFER REQUEST |
| 2849 | * 04h - 7Fh Reserved |
| 2850 | * 80h - FFh Vendor specific |
| 2851 | */ |
| 2852 | static void msgin_phase0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 2853 | u16 *pscsi_status) |
| 2854 | { |
| 2855 | struct DeviceCtlBlk *dcb = acb->active_dcb; |
| 2856 | dprintkdbg(DBG_0, "msgin_phase0: (pid#%li)\n", srb->cmd->pid); |
| 2857 | |
| 2858 | srb->msgin_buf[acb->msg_len++] = DC395x_read8(acb, TRM_S1040_SCSI_FIFO); |
| 2859 | if (msgin_completed(srb->msgin_buf, acb->msg_len)) { |
| 2860 | /* Now eval the msg */ |
| 2861 | switch (srb->msgin_buf[0]) { |
| 2862 | case DISCONNECT: |
| 2863 | srb->state = SRB_DISCONNECT; |
| 2864 | break; |
| 2865 | |
| 2866 | case SIMPLE_QUEUE_TAG: |
| 2867 | case HEAD_OF_QUEUE_TAG: |
| 2868 | case ORDERED_QUEUE_TAG: |
| 2869 | srb = |
| 2870 | msgin_qtag(acb, dcb, |
| 2871 | srb->msgin_buf[1]); |
| 2872 | break; |
| 2873 | |
| 2874 | case MESSAGE_REJECT: |
| 2875 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, |
| 2876 | DO_CLRATN | DO_DATALATCH); |
| 2877 | /* A sync nego message was rejected ! */ |
| 2878 | if (srb->state & SRB_DO_SYNC_NEGO) { |
| 2879 | msgin_set_async(acb, srb); |
| 2880 | break; |
| 2881 | } |
| 2882 | /* A wide nego message was rejected ! */ |
| 2883 | if (srb->state & SRB_DO_WIDE_NEGO) { |
| 2884 | msgin_set_nowide(acb, srb); |
| 2885 | break; |
| 2886 | } |
| 2887 | enable_msgout_abort(acb, srb); |
| 2888 | /*srb->state |= SRB_ABORT_SENT */ |
| 2889 | break; |
| 2890 | |
| 2891 | case EXTENDED_MESSAGE: |
| 2892 | /* SDTR */ |
| 2893 | if (srb->msgin_buf[1] == 3 |
| 2894 | && srb->msgin_buf[2] == EXTENDED_SDTR) { |
| 2895 | msgin_set_sync(acb, srb); |
| 2896 | break; |
| 2897 | } |
| 2898 | /* WDTR */ |
| 2899 | if (srb->msgin_buf[1] == 2 |
| 2900 | && srb->msgin_buf[2] == EXTENDED_WDTR |
| 2901 | && srb->msgin_buf[3] <= 2) { /* sanity check ... */ |
| 2902 | msgin_set_wide(acb, srb); |
| 2903 | break; |
| 2904 | } |
| 2905 | msgin_reject(acb, srb); |
| 2906 | break; |
| 2907 | |
| 2908 | case MSG_IGNOREWIDE: |
| 2909 | /* Discard wide residual */ |
| 2910 | dprintkdbg(DBG_0, "msgin_phase0: Ignore Wide Residual!\n"); |
| 2911 | break; |
| 2912 | |
| 2913 | case COMMAND_COMPLETE: |
| 2914 | /* nothing has to be done */ |
| 2915 | break; |
| 2916 | |
| 2917 | case SAVE_POINTERS: |
| 2918 | /* |
| 2919 | * SAVE POINTER may be ignored as we have the struct |
| 2920 | * ScsiReqBlk* associated with the scsi command. |
| 2921 | */ |
| 2922 | dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) " |
| 2923 | "SAVE POINTER rem=%i Ignore\n", |
| 2924 | srb->cmd->pid, srb->total_xfer_length); |
| 2925 | break; |
| 2926 | |
| 2927 | case RESTORE_POINTERS: |
| 2928 | dprintkdbg(DBG_0, "msgin_phase0: RESTORE POINTER. Ignore\n"); |
| 2929 | break; |
| 2930 | |
| 2931 | case ABORT: |
| 2932 | dprintkdbg(DBG_0, "msgin_phase0: (pid#%li) " |
| 2933 | "<%02i-%i> ABORT msg\n", |
| 2934 | srb->cmd->pid, dcb->target_id, |
| 2935 | dcb->target_lun); |
| 2936 | dcb->flag |= ABORT_DEV_; |
| 2937 | enable_msgout_abort(acb, srb); |
| 2938 | break; |
| 2939 | |
| 2940 | default: |
| 2941 | /* reject unknown messages */ |
| 2942 | if (srb->msgin_buf[0] & IDENTIFY_BASE) { |
| 2943 | dprintkdbg(DBG_0, "msgin_phase0: Identify msg\n"); |
| 2944 | srb->msg_count = 1; |
| 2945 | srb->msgout_buf[0] = dcb->identify_msg; |
| 2946 | DC395x_ENABLE_MSGOUT; |
| 2947 | srb->state |= SRB_MSGOUT; |
| 2948 | /*break; */ |
| 2949 | } |
| 2950 | msgin_reject(acb, srb); |
| 2951 | } |
| 2952 | |
| 2953 | /* Clear counter and MsgIn state */ |
| 2954 | srb->state &= ~SRB_MSGIN; |
| 2955 | acb->msg_len = 0; |
| 2956 | } |
| 2957 | *pscsi_status = PH_BUS_FREE; |
| 2958 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important ... you know! */ |
| 2959 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); |
| 2960 | } |
| 2961 | |
| 2962 | |
| 2963 | static void msgin_phase1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 2964 | u16 *pscsi_status) |
| 2965 | { |
| 2966 | dprintkdbg(DBG_0, "msgin_phase1: (pid#%li)\n", srb->cmd->pid); |
| 2967 | clear_fifo(acb, "msgin_phase1"); |
| 2968 | DC395x_write32(acb, TRM_S1040_SCSI_COUNTER, 1); |
| 2969 | if (!(srb->state & SRB_MSGIN)) { |
| 2970 | srb->state &= ~SRB_DISCONNECT; |
| 2971 | srb->state |= SRB_MSGIN; |
| 2972 | } |
| 2973 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| 2974 | /* SCSI command */ |
| 2975 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_FIFO_IN); |
| 2976 | } |
| 2977 | |
| 2978 | |
| 2979 | static void nop0(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 2980 | u16 *pscsi_status) |
| 2981 | { |
| 2982 | } |
| 2983 | |
| 2984 | |
| 2985 | static void nop1(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb, |
| 2986 | u16 *pscsi_status) |
| 2987 | { |
| 2988 | } |
| 2989 | |
| 2990 | |
| 2991 | static void set_xfer_rate(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb) |
| 2992 | { |
| 2993 | struct DeviceCtlBlk *i; |
| 2994 | |
| 2995 | /* set all lun device's period, offset */ |
| 2996 | if (dcb->identify_msg & 0x07) |
| 2997 | return; |
| 2998 | |
| 2999 | if (acb->scan_devices) { |
| 3000 | current_sync_offset = dcb->sync_offset; |
| 3001 | return; |
| 3002 | } |
| 3003 | |
| 3004 | list_for_each_entry(i, &acb->dcb_list, list) |
| 3005 | if (i->target_id == dcb->target_id) { |
| 3006 | i->sync_period = dcb->sync_period; |
| 3007 | i->sync_offset = dcb->sync_offset; |
| 3008 | i->sync_mode = dcb->sync_mode; |
| 3009 | i->min_nego_period = dcb->min_nego_period; |
| 3010 | } |
| 3011 | } |
| 3012 | |
| 3013 | |
| 3014 | static void disconnect(struct AdapterCtlBlk *acb) |
| 3015 | { |
| 3016 | struct DeviceCtlBlk *dcb = acb->active_dcb; |
| 3017 | struct ScsiReqBlk *srb; |
| 3018 | |
| 3019 | if (!dcb) { |
| 3020 | dprintkl(KERN_ERR, "disconnect: No such device\n"); |
| 3021 | udelay(500); |
| 3022 | /* Suspend queue for a while */ |
| 3023 | acb->scsi_host->last_reset = |
| 3024 | jiffies + HZ / 2 + |
| 3025 | HZ * acb->eeprom.delay_time; |
| 3026 | clear_fifo(acb, "disconnectEx"); |
| 3027 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); |
| 3028 | return; |
| 3029 | } |
| 3030 | srb = dcb->active_srb; |
| 3031 | acb->active_dcb = NULL; |
| 3032 | dprintkdbg(DBG_0, "disconnect: (pid#%li)\n", srb->cmd->pid); |
| 3033 | |
| 3034 | srb->scsi_phase = PH_BUS_FREE; /* initial phase */ |
| 3035 | clear_fifo(acb, "disconnect"); |
| 3036 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); |
| 3037 | if (srb->state & SRB_UNEXPECT_RESEL) { |
| 3038 | dprintkl(KERN_ERR, |
| 3039 | "disconnect: Unexpected reselection <%02i-%i>\n", |
| 3040 | dcb->target_id, dcb->target_lun); |
| 3041 | srb->state = 0; |
| 3042 | waiting_process_next(acb); |
| 3043 | } else if (srb->state & SRB_ABORT_SENT) { |
| 3044 | dcb->flag &= ~ABORT_DEV_; |
| 3045 | acb->scsi_host->last_reset = jiffies + HZ / 2 + 1; |
| 3046 | dprintkl(KERN_ERR, "disconnect: SRB_ABORT_SENT\n"); |
| 3047 | doing_srb_done(acb, DID_ABORT, srb->cmd, 1); |
| 3048 | waiting_process_next(acb); |
| 3049 | } else { |
| 3050 | if ((srb->state & (SRB_START_ + SRB_MSGOUT)) |
| 3051 | || !(srb-> |
| 3052 | state & (SRB_DISCONNECT + SRB_COMPLETED))) { |
| 3053 | /* |
| 3054 | * Selection time out |
| 3055 | * SRB_START_ || SRB_MSGOUT || (!SRB_DISCONNECT && !SRB_COMPLETED) |
| 3056 | */ |
| 3057 | /* Unexp. Disc / Sel Timeout */ |
| 3058 | if (srb->state != SRB_START_ |
| 3059 | && srb->state != SRB_MSGOUT) { |
| 3060 | srb->state = SRB_READY; |
| 3061 | dprintkl(KERN_DEBUG, |
| 3062 | "disconnect: (pid#%li) Unexpected\n", |
| 3063 | srb->cmd->pid); |
| 3064 | srb->target_status = SCSI_STAT_SEL_TIMEOUT; |
| 3065 | goto disc1; |
| 3066 | } else { |
| 3067 | /* Normal selection timeout */ |
| 3068 | dprintkdbg(DBG_KG, "disconnect: (pid#%li) " |
| 3069 | "<%02i-%i> SelTO\n", srb->cmd->pid, |
| 3070 | dcb->target_id, dcb->target_lun); |
| 3071 | if (srb->retry_count++ > DC395x_MAX_RETRIES |
| 3072 | || acb->scan_devices) { |
| 3073 | srb->target_status = |
| 3074 | SCSI_STAT_SEL_TIMEOUT; |
| 3075 | goto disc1; |
| 3076 | } |
| 3077 | free_tag(dcb, srb); |
| 3078 | srb_going_to_waiting_move(dcb, srb); |
| 3079 | dprintkdbg(DBG_KG, |
| 3080 | "disconnect: (pid#%li) Retry\n", |
| 3081 | srb->cmd->pid); |
| 3082 | waiting_set_timer(acb, HZ / 20); |
| 3083 | } |
| 3084 | } else if (srb->state & SRB_DISCONNECT) { |
| 3085 | u8 bval = DC395x_read8(acb, TRM_S1040_SCSI_SIGNAL); |
| 3086 | /* |
| 3087 | * SRB_DISCONNECT (This is what we expect!) |
| 3088 | */ |
| 3089 | if (bval & 0x40) { |
| 3090 | dprintkdbg(DBG_0, "disconnect: SCSI bus stat " |
| 3091 | " 0x%02x: ACK set! Other controllers?\n", |
| 3092 | bval); |
| 3093 | /* It could come from another initiator, therefore don't do much ! */ |
| 3094 | } else |
| 3095 | waiting_process_next(acb); |
| 3096 | } else if (srb->state & SRB_COMPLETED) { |
| 3097 | disc1: |
| 3098 | /* |
| 3099 | ** SRB_COMPLETED |
| 3100 | */ |
| 3101 | free_tag(dcb, srb); |
| 3102 | dcb->active_srb = NULL; |
| 3103 | srb->state = SRB_FREE; |
| 3104 | srb_done(acb, dcb, srb); |
| 3105 | } |
| 3106 | } |
| 3107 | } |
| 3108 | |
| 3109 | |
| 3110 | static void reselect(struct AdapterCtlBlk *acb) |
| 3111 | { |
| 3112 | struct DeviceCtlBlk *dcb = acb->active_dcb; |
| 3113 | struct ScsiReqBlk *srb = NULL; |
| 3114 | u16 rsel_tar_lun_id; |
| 3115 | u8 id, lun; |
| 3116 | u8 arblostflag = 0; |
| 3117 | dprintkdbg(DBG_0, "reselect: acb=%p\n", acb); |
| 3118 | |
| 3119 | clear_fifo(acb, "reselect"); |
| 3120 | /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT | DO_DATALATCH); */ |
| 3121 | /* Read Reselected Target ID and LUN */ |
| 3122 | rsel_tar_lun_id = DC395x_read16(acb, TRM_S1040_SCSI_TARGETID); |
| 3123 | if (dcb) { /* Arbitration lost but Reselection win */ |
| 3124 | srb = dcb->active_srb; |
| 3125 | if (!srb) { |
| 3126 | dprintkl(KERN_DEBUG, "reselect: Arb lost Resel won, " |
| 3127 | "but active_srb == NULL\n"); |
| 3128 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| 3129 | return; |
| 3130 | } |
| 3131 | /* Why the if ? */ |
| 3132 | if (!acb->scan_devices) { |
| 3133 | dprintkdbg(DBG_KG, "reselect: (pid#%li) <%02i-%i> " |
| 3134 | "Arb lost but Resel win rsel=%i stat=0x%04x\n", |
| 3135 | srb->cmd->pid, dcb->target_id, |
| 3136 | dcb->target_lun, rsel_tar_lun_id, |
| 3137 | DC395x_read16(acb, TRM_S1040_SCSI_STATUS)); |
| 3138 | arblostflag = 1; |
| 3139 | /*srb->state |= SRB_DISCONNECT; */ |
| 3140 | |
| 3141 | srb->state = SRB_READY; |
| 3142 | free_tag(dcb, srb); |
| 3143 | srb_going_to_waiting_move(dcb, srb); |
| 3144 | waiting_set_timer(acb, HZ / 20); |
| 3145 | |
| 3146 | /* return; */ |
| 3147 | } |
| 3148 | } |
| 3149 | /* Read Reselected Target Id and LUN */ |
| 3150 | if (!(rsel_tar_lun_id & (IDENTIFY_BASE << 8))) |
| 3151 | dprintkl(KERN_DEBUG, "reselect: Expects identify msg. " |
| 3152 | "Got %i!\n", rsel_tar_lun_id); |
| 3153 | id = rsel_tar_lun_id & 0xff; |
| 3154 | lun = (rsel_tar_lun_id >> 8) & 7; |
| 3155 | dcb = find_dcb(acb, id, lun); |
| 3156 | if (!dcb) { |
| 3157 | dprintkl(KERN_ERR, "reselect: From non existent device " |
| 3158 | "<%02i-%i>\n", id, lun); |
| 3159 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| 3160 | return; |
| 3161 | } |
| 3162 | acb->active_dcb = dcb; |
| 3163 | |
| 3164 | if (!(dcb->dev_mode & NTC_DO_DISCONNECT)) |
| 3165 | dprintkl(KERN_DEBUG, "reselect: in spite of forbidden " |
| 3166 | "disconnection? <%02i-%i>\n", |
| 3167 | dcb->target_id, dcb->target_lun); |
| 3168 | |
| 3169 | if (dcb->sync_mode & EN_TAG_QUEUEING /*&& !arblostflag */) { |
| 3170 | srb = acb->tmp_srb; |
| 3171 | dcb->active_srb = srb; |
| 3172 | } else { |
| 3173 | /* There can be only one! */ |
| 3174 | srb = dcb->active_srb; |
| 3175 | if (!srb || !(srb->state & SRB_DISCONNECT)) { |
| 3176 | /* |
| 3177 | * abort command |
| 3178 | */ |
| 3179 | dprintkl(KERN_DEBUG, |
| 3180 | "reselect: w/o disconnected cmds <%02i-%i>\n", |
| 3181 | dcb->target_id, dcb->target_lun); |
| 3182 | srb = acb->tmp_srb; |
| 3183 | srb->state = SRB_UNEXPECT_RESEL; |
| 3184 | dcb->active_srb = srb; |
| 3185 | enable_msgout_abort(acb, srb); |
| 3186 | } else { |
| 3187 | if (dcb->flag & ABORT_DEV_) { |
| 3188 | /*srb->state = SRB_ABORT_SENT; */ |
| 3189 | enable_msgout_abort(acb, srb); |
| 3190 | } else |
| 3191 | srb->state = SRB_DATA_XFER; |
| 3192 | |
| 3193 | } |
| 3194 | } |
| 3195 | srb->scsi_phase = PH_BUS_FREE; /* initial phase */ |
| 3196 | |
| 3197 | /* Program HA ID, target ID, period and offset */ |
| 3198 | dprintkdbg(DBG_0, "reselect: select <%i>\n", dcb->target_id); |
| 3199 | DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); /* host ID */ |
| 3200 | DC395x_write8(acb, TRM_S1040_SCSI_TARGETID, dcb->target_id); /* target ID */ |
| 3201 | DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, dcb->sync_offset); /* offset */ |
| 3202 | DC395x_write8(acb, TRM_S1040_SCSI_SYNC, dcb->sync_period); /* sync period, wide */ |
| 3203 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_DATALATCH); /* it's important for atn stop */ |
| 3204 | /* SCSI command */ |
| 3205 | DC395x_write8(acb, TRM_S1040_SCSI_COMMAND, SCMD_MSGACCEPT); |
| 3206 | } |
| 3207 | |
| 3208 | |
| 3209 | static inline u8 tagq_blacklist(char *name) |
| 3210 | { |
| 3211 | #ifndef DC395x_NO_TAGQ |
| 3212 | #if 0 |
| 3213 | u8 i; |
| 3214 | for (i = 0; i < BADDEVCNT; i++) |
| 3215 | if (memcmp(name, DC395x_baddevname1[i], 28) == 0) |
| 3216 | return 1; |
| 3217 | #endif |
| 3218 | return 0; |
| 3219 | #else |
| 3220 | return 1; |
| 3221 | #endif |
| 3222 | } |
| 3223 | |
| 3224 | |
| 3225 | static void disc_tagq_set(struct DeviceCtlBlk *dcb, struct ScsiInqData *ptr) |
| 3226 | { |
| 3227 | /* Check for SCSI format (ANSI and Response data format) */ |
| 3228 | if ((ptr->Vers & 0x07) >= 2 || (ptr->RDF & 0x0F) == 2) { |
| 3229 | if ((ptr->Flags & SCSI_INQ_CMDQUEUE) |
| 3230 | && (dcb->dev_mode & NTC_DO_TAG_QUEUEING) && |
| 3231 | /*(dcb->dev_mode & NTC_DO_DISCONNECT) */ |
| 3232 | /* ((dcb->dev_type == TYPE_DISK) |
| 3233 | || (dcb->dev_type == TYPE_MOD)) && */ |
| 3234 | !tagq_blacklist(((char *)ptr) + 8)) { |
| 3235 | if (dcb->max_command == 1) |
| 3236 | dcb->max_command = |
| 3237 | dcb->acb->tag_max_num; |
| 3238 | dcb->sync_mode |= EN_TAG_QUEUEING; |
| 3239 | /*dcb->tag_mask = 0; */ |
| 3240 | } else |
| 3241 | dcb->max_command = 1; |
| 3242 | } |
| 3243 | } |
| 3244 | |
| 3245 | |
| 3246 | static void add_dev(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, |
| 3247 | struct ScsiInqData *ptr) |
| 3248 | { |
| 3249 | u8 bval1 = ptr->DevType & SCSI_DEVTYPE; |
| 3250 | dcb->dev_type = bval1; |
| 3251 | /* if (bval1 == TYPE_DISK || bval1 == TYPE_MOD) */ |
| 3252 | disc_tagq_set(dcb, ptr); |
| 3253 | } |
| 3254 | |
| 3255 | |
| 3256 | /* unmap mapped pci regions from SRB */ |
| 3257 | static void pci_unmap_srb(struct AdapterCtlBlk *acb, struct ScsiReqBlk *srb) |
| 3258 | { |
| 3259 | struct scsi_cmnd *cmd = srb->cmd; |
| 3260 | enum dma_data_direction dir = cmd->sc_data_direction; |
| 3261 | if (cmd->use_sg && dir != PCI_DMA_NONE) { |
| 3262 | int i; |
| 3263 | /* unmap DC395x SG list */ |
| 3264 | dprintkdbg(DBG_SG, "pci_unmap_srb: list=%08x(%05x)\n", |
| 3265 | srb->sg_bus_addr, SEGMENTX_LEN); |
| 3266 | pci_unmap_single(acb->dev, srb->sg_bus_addr, |
| 3267 | SEGMENTX_LEN, |
| 3268 | PCI_DMA_TODEVICE); |
| 3269 | dprintkdbg(DBG_SG, "pci_unmap_srb: segs=%i buffer=%p\n", |
| 3270 | cmd->use_sg, cmd->request_buffer); |
| 3271 | /* unmap the sg segments */ |
| 3272 | for (i = 0; i < srb->sg_count; i++) |
| 3273 | kunmap(virt_to_page(srb->virt_map[i])); |
| 3274 | pci_unmap_sg(acb->dev, |
| 3275 | (struct scatterlist *)cmd->request_buffer, |
| 3276 | cmd->use_sg, dir); |
| 3277 | } else if (cmd->request_buffer && dir != PCI_DMA_NONE) { |
| 3278 | dprintkdbg(DBG_SG, "pci_unmap_srb: buffer=%08x(%05x)\n", |
| 3279 | srb->segment_x[0].address, cmd->request_bufflen); |
| 3280 | pci_unmap_single(acb->dev, srb->segment_x[0].address, |
| 3281 | cmd->request_bufflen, dir); |
| 3282 | } |
| 3283 | } |
| 3284 | |
| 3285 | |
| 3286 | /* unmap mapped pci sense buffer from SRB */ |
| 3287 | static void pci_unmap_srb_sense(struct AdapterCtlBlk *acb, |
| 3288 | struct ScsiReqBlk *srb) |
| 3289 | { |
| 3290 | if (!(srb->flag & AUTO_REQSENSE)) |
| 3291 | return; |
| 3292 | /* Unmap sense buffer */ |
| 3293 | dprintkdbg(DBG_SG, "pci_unmap_srb_sense: buffer=%08x\n", |
| 3294 | srb->segment_x[0].address); |
| 3295 | pci_unmap_single(acb->dev, srb->segment_x[0].address, |
| 3296 | srb->segment_x[0].length, PCI_DMA_FROMDEVICE); |
| 3297 | /* Restore SG stuff */ |
| 3298 | srb->total_xfer_length = srb->xferred; |
| 3299 | srb->segment_x[0].address = |
| 3300 | srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address; |
| 3301 | srb->segment_x[0].length = |
| 3302 | srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length; |
| 3303 | } |
| 3304 | |
| 3305 | |
| 3306 | /* |
| 3307 | * Complete execution of a SCSI command |
| 3308 | * Signal completion to the generic SCSI driver |
| 3309 | */ |
| 3310 | static void srb_done(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, |
| 3311 | struct ScsiReqBlk *srb) |
| 3312 | { |
| 3313 | u8 tempcnt, status; |
| 3314 | struct scsi_cmnd *cmd = srb->cmd; |
| 3315 | struct ScsiInqData *ptr; |
| 3316 | enum dma_data_direction dir = cmd->sc_data_direction; |
| 3317 | |
| 3318 | if (cmd->use_sg) { |
| 3319 | struct scatterlist* sg = (struct scatterlist *)cmd->request_buffer; |
| 3320 | ptr = (struct ScsiInqData *)(srb->virt_map[0] + sg->offset); |
| 3321 | } else { |
| 3322 | ptr = (struct ScsiInqData *)(cmd->request_buffer); |
| 3323 | } |
| 3324 | |
| 3325 | dprintkdbg(DBG_1, "srb_done: (pid#%li) <%02i-%i>\n", srb->cmd->pid, |
| 3326 | srb->cmd->device->id, srb->cmd->device->lun); |
| 3327 | dprintkdbg(DBG_SG, "srb_done: srb=%p sg=%i(%i/%i) buf=%p addr=%p\n", |
| 3328 | srb, cmd->use_sg, srb->sg_index, srb->sg_count, |
| 3329 | cmd->request_buffer, ptr); |
| 3330 | status = srb->target_status; |
| 3331 | if (srb->flag & AUTO_REQSENSE) { |
| 3332 | dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE1\n"); |
| 3333 | pci_unmap_srb_sense(acb, srb); |
| 3334 | /* |
| 3335 | ** target status.......................... |
| 3336 | */ |
| 3337 | srb->flag &= ~AUTO_REQSENSE; |
| 3338 | srb->adapter_status = 0; |
| 3339 | srb->target_status = CHECK_CONDITION << 1; |
| 3340 | if (debug_enabled(DBG_1)) { |
| 3341 | switch (cmd->sense_buffer[2] & 0x0f) { |
| 3342 | case NOT_READY: |
| 3343 | dprintkl(KERN_DEBUG, |
| 3344 | "ReqSense: NOT_READY cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", |
| 3345 | cmd->cmnd[0], dcb->target_id, |
| 3346 | dcb->target_lun, status, acb->scan_devices); |
| 3347 | break; |
| 3348 | case UNIT_ATTENTION: |
| 3349 | dprintkl(KERN_DEBUG, |
| 3350 | "ReqSense: UNIT_ATTENTION cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", |
| 3351 | cmd->cmnd[0], dcb->target_id, |
| 3352 | dcb->target_lun, status, acb->scan_devices); |
| 3353 | break; |
| 3354 | case ILLEGAL_REQUEST: |
| 3355 | dprintkl(KERN_DEBUG, |
| 3356 | "ReqSense: ILLEGAL_REQUEST cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", |
| 3357 | cmd->cmnd[0], dcb->target_id, |
| 3358 | dcb->target_lun, status, acb->scan_devices); |
| 3359 | break; |
| 3360 | case MEDIUM_ERROR: |
| 3361 | dprintkl(KERN_DEBUG, |
| 3362 | "ReqSense: MEDIUM_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", |
| 3363 | cmd->cmnd[0], dcb->target_id, |
| 3364 | dcb->target_lun, status, acb->scan_devices); |
| 3365 | break; |
| 3366 | case HARDWARE_ERROR: |
| 3367 | dprintkl(KERN_DEBUG, |
| 3368 | "ReqSense: HARDWARE_ERROR cmnd=0x%02x <%02i-%i> stat=%i scan=%i ", |
| 3369 | cmd->cmnd[0], dcb->target_id, |
| 3370 | dcb->target_lun, status, acb->scan_devices); |
| 3371 | break; |
| 3372 | } |
| 3373 | if (cmd->sense_buffer[7] >= 6) |
| 3374 | printk("sense=0x%02x ASC=0x%02x ASCQ=0x%02x " |
| 3375 | "(0x%08x 0x%08x)\n", |
| 3376 | cmd->sense_buffer[2], cmd->sense_buffer[12], |
| 3377 | cmd->sense_buffer[13], |
| 3378 | *((unsigned int *)(cmd->sense_buffer + 3)), |
| 3379 | *((unsigned int *)(cmd->sense_buffer + 8))); |
| 3380 | else |
| 3381 | printk("sense=0x%02x No ASC/ASCQ (0x%08x)\n", |
| 3382 | cmd->sense_buffer[2], |
| 3383 | *((unsigned int *)(cmd->sense_buffer + 3))); |
| 3384 | } |
| 3385 | |
| 3386 | if (status == (CHECK_CONDITION << 1)) { |
| 3387 | cmd->result = DID_BAD_TARGET << 16; |
| 3388 | goto ckc_e; |
| 3389 | } |
| 3390 | dprintkdbg(DBG_0, "srb_done: AUTO_REQSENSE2\n"); |
| 3391 | |
| 3392 | if (srb->total_xfer_length |
| 3393 | && srb->total_xfer_length >= cmd->underflow) |
| 3394 | cmd->result = |
| 3395 | MK_RES_LNX(DRIVER_SENSE, DID_OK, |
| 3396 | srb->end_message, CHECK_CONDITION); |
| 3397 | /*SET_RES_DID(cmd->result,DID_OK) */ |
| 3398 | else |
| 3399 | cmd->result = |
| 3400 | MK_RES_LNX(DRIVER_SENSE, DID_OK, |
| 3401 | srb->end_message, CHECK_CONDITION); |
| 3402 | |
| 3403 | goto ckc_e; |
| 3404 | } |
| 3405 | |
| 3406 | /*************************************************************/ |
| 3407 | if (status) { |
| 3408 | /* |
| 3409 | * target status.......................... |
| 3410 | */ |
| 3411 | if (status_byte(status) == CHECK_CONDITION) { |
| 3412 | request_sense(acb, dcb, srb); |
| 3413 | return; |
| 3414 | } else if (status_byte(status) == QUEUE_FULL) { |
| 3415 | tempcnt = (u8)list_size(&dcb->srb_going_list); |
| 3416 | dprintkl(KERN_INFO, "QUEUE_FULL for dev <%02i-%i> with %i cmnds\n", |
| 3417 | dcb->target_id, dcb->target_lun, tempcnt); |
| 3418 | if (tempcnt > 1) |
| 3419 | tempcnt--; |
| 3420 | dcb->max_command = tempcnt; |
| 3421 | free_tag(dcb, srb); |
| 3422 | srb_going_to_waiting_move(dcb, srb); |
| 3423 | waiting_set_timer(acb, HZ / 20); |
| 3424 | srb->adapter_status = 0; |
| 3425 | srb->target_status = 0; |
| 3426 | return; |
| 3427 | } else if (status == SCSI_STAT_SEL_TIMEOUT) { |
| 3428 | srb->adapter_status = H_SEL_TIMEOUT; |
| 3429 | srb->target_status = 0; |
| 3430 | cmd->result = DID_NO_CONNECT << 16; |
| 3431 | } else { |
| 3432 | srb->adapter_status = 0; |
| 3433 | SET_RES_DID(cmd->result, DID_ERROR); |
| 3434 | SET_RES_MSG(cmd->result, srb->end_message); |
| 3435 | SET_RES_TARGET(cmd->result, status); |
| 3436 | |
| 3437 | } |
| 3438 | } else { |
| 3439 | /* |
| 3440 | ** process initiator status.......................... |
| 3441 | */ |
| 3442 | status = srb->adapter_status; |
| 3443 | if (status & H_OVER_UNDER_RUN) { |
| 3444 | srb->target_status = 0; |
| 3445 | SET_RES_DID(cmd->result, DID_OK); |
| 3446 | SET_RES_MSG(cmd->result, srb->end_message); |
| 3447 | } else if (srb->status & PARITY_ERROR) { |
| 3448 | SET_RES_DID(cmd->result, DID_PARITY); |
| 3449 | SET_RES_MSG(cmd->result, srb->end_message); |
| 3450 | } else { /* No error */ |
| 3451 | |
| 3452 | srb->adapter_status = 0; |
| 3453 | srb->target_status = 0; |
| 3454 | SET_RES_DID(cmd->result, DID_OK); |
| 3455 | } |
| 3456 | } |
| 3457 | |
| 3458 | if (dir != PCI_DMA_NONE) { |
| 3459 | if (cmd->use_sg) |
| 3460 | pci_dma_sync_sg_for_cpu(acb->dev, |
| 3461 | (struct scatterlist *)cmd-> |
| 3462 | request_buffer, cmd->use_sg, dir); |
| 3463 | else if (cmd->request_buffer) |
| 3464 | pci_dma_sync_single_for_cpu(acb->dev, |
| 3465 | srb->segment_x[0].address, |
| 3466 | cmd->request_bufflen, dir); |
| 3467 | } |
| 3468 | |
| 3469 | if ((cmd->result & RES_DID) == 0 && cmd->cmnd[0] == INQUIRY |
| 3470 | && cmd->cmnd[2] == 0 && cmd->request_bufflen >= 8 |
| 3471 | && dir != PCI_DMA_NONE && ptr && (ptr->Vers & 0x07) >= 2) |
| 3472 | dcb->inquiry7 = ptr->Flags; |
| 3473 | /* Check Error Conditions */ |
| 3474 | ckc_e: |
| 3475 | |
| 3476 | /*if( srb->cmd->cmnd[0] == INQUIRY && */ |
| 3477 | /* (host_byte(cmd->result) == DID_OK || status_byte(cmd->result) & CHECK_CONDITION) ) */ |
| 3478 | if (cmd->cmnd[0] == INQUIRY && (cmd->result == (DID_OK << 16) |
| 3479 | || status_byte(cmd-> |
| 3480 | result) & |
| 3481 | CHECK_CONDITION)) { |
| 3482 | |
| 3483 | if (!dcb->init_tcq_flag) { |
| 3484 | add_dev(acb, dcb, ptr); |
| 3485 | dcb->init_tcq_flag = 1; |
| 3486 | } |
| 3487 | |
| 3488 | } |
| 3489 | |
| 3490 | |
| 3491 | /* Here is the info for Doug Gilbert's sg3 ... */ |
| 3492 | cmd->resid = srb->total_xfer_length; |
| 3493 | /* This may be interpreted by sb. or not ... */ |
| 3494 | cmd->SCp.this_residual = srb->total_xfer_length; |
| 3495 | cmd->SCp.buffers_residual = 0; |
| 3496 | if (debug_enabled(DBG_KG)) { |
| 3497 | if (srb->total_xfer_length) |
| 3498 | dprintkdbg(DBG_KG, "srb_done: (pid#%li) <%02i-%i> " |
| 3499 | "cmnd=0x%02x Missed %i bytes\n", |
| 3500 | cmd->pid, cmd->device->id, cmd->device->lun, |
| 3501 | cmd->cmnd[0], srb->total_xfer_length); |
| 3502 | } |
| 3503 | |
| 3504 | srb_going_remove(dcb, srb); |
| 3505 | /* Add to free list */ |
| 3506 | if (srb == acb->tmp_srb) |
| 3507 | dprintkl(KERN_ERR, "srb_done: ERROR! Completed cmd with tmp_srb\n"); |
| 3508 | else { |
| 3509 | dprintkdbg(DBG_0, "srb_done: (pid#%li) done result=0x%08x\n", |
| 3510 | cmd->pid, cmd->result); |
| 3511 | srb_free_insert(acb, srb); |
| 3512 | } |
| 3513 | pci_unmap_srb(acb, srb); |
| 3514 | |
| 3515 | cmd->scsi_done(cmd); |
| 3516 | waiting_process_next(acb); |
| 3517 | } |
| 3518 | |
| 3519 | |
| 3520 | /* abort all cmds in our queues */ |
| 3521 | static void doing_srb_done(struct AdapterCtlBlk *acb, u8 did_flag, |
| 3522 | struct scsi_cmnd *cmd, u8 force) |
| 3523 | { |
| 3524 | struct DeviceCtlBlk *dcb; |
| 3525 | dprintkl(KERN_INFO, "doing_srb_done: pids "); |
| 3526 | |
| 3527 | list_for_each_entry(dcb, &acb->dcb_list, list) { |
| 3528 | struct ScsiReqBlk *srb; |
| 3529 | struct ScsiReqBlk *tmp; |
| 3530 | struct scsi_cmnd *p; |
| 3531 | |
| 3532 | list_for_each_entry_safe(srb, tmp, &dcb->srb_going_list, list) { |
| 3533 | enum dma_data_direction dir; |
| 3534 | int result; |
| 3535 | |
| 3536 | p = srb->cmd; |
| 3537 | dir = p->sc_data_direction; |
| 3538 | result = MK_RES(0, did_flag, 0, 0); |
| 3539 | printk("G:%li(%02i-%i) ", p->pid, |
| 3540 | p->device->id, p->device->lun); |
| 3541 | srb_going_remove(dcb, srb); |
| 3542 | free_tag(dcb, srb); |
| 3543 | srb_free_insert(acb, srb); |
| 3544 | p->result = result; |
| 3545 | pci_unmap_srb_sense(acb, srb); |
| 3546 | pci_unmap_srb(acb, srb); |
| 3547 | if (force) { |
| 3548 | /* For new EH, we normally don't need to give commands back, |
| 3549 | * as they all complete or all time out */ |
| 3550 | p->scsi_done(p); |
| 3551 | } |
| 3552 | } |
| 3553 | if (!list_empty(&dcb->srb_going_list)) |
| 3554 | dprintkl(KERN_DEBUG, |
| 3555 | "How could the ML send cmnds to the Going queue? <%02i-%i>\n", |
| 3556 | dcb->target_id, dcb->target_lun); |
| 3557 | if (dcb->tag_mask) |
| 3558 | dprintkl(KERN_DEBUG, |
| 3559 | "tag_mask for <%02i-%i> should be empty, is %08x!\n", |
| 3560 | dcb->target_id, dcb->target_lun, |
| 3561 | dcb->tag_mask); |
| 3562 | |
| 3563 | /* Waiting queue */ |
| 3564 | list_for_each_entry_safe(srb, tmp, &dcb->srb_waiting_list, list) { |
| 3565 | int result; |
| 3566 | p = srb->cmd; |
| 3567 | |
| 3568 | result = MK_RES(0, did_flag, 0, 0); |
| 3569 | printk("W:%li<%02i-%i>", p->pid, p->device->id, |
| 3570 | p->device->lun); |
| 3571 | srb_waiting_remove(dcb, srb); |
| 3572 | srb_free_insert(acb, srb); |
| 3573 | p->result = result; |
| 3574 | pci_unmap_srb_sense(acb, srb); |
| 3575 | pci_unmap_srb(acb, srb); |
| 3576 | if (force) { |
| 3577 | /* For new EH, we normally don't need to give commands back, |
| 3578 | * as they all complete or all time out */ |
| 3579 | cmd->scsi_done(cmd); |
| 3580 | } |
| 3581 | } |
| 3582 | if (!list_empty(&dcb->srb_waiting_list)) |
| 3583 | dprintkl(KERN_DEBUG, "ML queued %i cmnds again to <%02i-%i>\n", |
| 3584 | list_size(&dcb->srb_waiting_list), dcb->target_id, |
| 3585 | dcb->target_lun); |
| 3586 | dcb->flag &= ~ABORT_DEV_; |
| 3587 | } |
| 3588 | printk("\n"); |
| 3589 | } |
| 3590 | |
| 3591 | |
| 3592 | static void reset_scsi_bus(struct AdapterCtlBlk *acb) |
| 3593 | { |
| 3594 | dprintkdbg(DBG_0, "reset_scsi_bus: acb=%p\n", acb); |
| 3595 | acb->acb_flag |= RESET_DEV; /* RESET_DETECT, RESET_DONE, RESET_DEV */ |
| 3596 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); |
| 3597 | |
| 3598 | while (!(DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET)) |
| 3599 | /* nothing */; |
| 3600 | } |
| 3601 | |
| 3602 | |
| 3603 | static void set_basic_config(struct AdapterCtlBlk *acb) |
| 3604 | { |
| 3605 | u8 bval; |
| 3606 | u16 wval; |
| 3607 | DC395x_write8(acb, TRM_S1040_SCSI_TIMEOUT, acb->sel_timeout); |
| 3608 | if (acb->config & HCC_PARITY) |
| 3609 | bval = PHASELATCH | INITIATOR | BLOCKRST | PARITYCHECK; |
| 3610 | else |
| 3611 | bval = PHASELATCH | INITIATOR | BLOCKRST; |
| 3612 | |
| 3613 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG0, bval); |
| 3614 | |
| 3615 | /* program configuration 1: Act_Neg (+ Act_Neg_Enh? + Fast_Filter? + DataDis?) */ |
| 3616 | DC395x_write8(acb, TRM_S1040_SCSI_CONFIG1, 0x03); /* was 0x13: default */ |
| 3617 | /* program Host ID */ |
| 3618 | DC395x_write8(acb, TRM_S1040_SCSI_HOSTID, acb->scsi_host->this_id); |
| 3619 | /* set ansynchronous transfer */ |
| 3620 | DC395x_write8(acb, TRM_S1040_SCSI_OFFSET, 0x00); |
| 3621 | /* Turn LED control off */ |
| 3622 | wval = DC395x_read16(acb, TRM_S1040_GEN_CONTROL) & 0x7F; |
| 3623 | DC395x_write16(acb, TRM_S1040_GEN_CONTROL, wval); |
| 3624 | /* DMA config */ |
| 3625 | wval = DC395x_read16(acb, TRM_S1040_DMA_CONFIG) & ~DMA_FIFO_CTRL; |
| 3626 | wval |= |
| 3627 | DMA_FIFO_HALF_HALF | DMA_ENHANCE /*| DMA_MEM_MULTI_READ */ ; |
| 3628 | DC395x_write16(acb, TRM_S1040_DMA_CONFIG, wval); |
| 3629 | /* Clear pending interrupt status */ |
| 3630 | DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); |
| 3631 | /* Enable SCSI interrupt */ |
| 3632 | DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x7F); |
| 3633 | DC395x_write8(acb, TRM_S1040_DMA_INTEN, EN_SCSIINTR | EN_DMAXFERERROR |
| 3634 | /*| EN_DMAXFERABORT | EN_DMAXFERCOMP | EN_FORCEDMACOMP */ |
| 3635 | ); |
| 3636 | } |
| 3637 | |
| 3638 | |
| 3639 | static void scsi_reset_detect(struct AdapterCtlBlk *acb) |
| 3640 | { |
| 3641 | dprintkl(KERN_INFO, "scsi_reset_detect: acb=%p\n", acb); |
| 3642 | /* delay half a second */ |
| 3643 | if (timer_pending(&acb->waiting_timer)) |
| 3644 | del_timer(&acb->waiting_timer); |
| 3645 | |
| 3646 | DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); |
| 3647 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); |
| 3648 | /*DC395x_write8(acb, TRM_S1040_DMA_CONTROL,STOPDMAXFER); */ |
| 3649 | udelay(500); |
| 3650 | /* Maybe we locked up the bus? Then lets wait even longer ... */ |
| 3651 | acb->scsi_host->last_reset = |
| 3652 | jiffies + 5 * HZ / 2 + |
| 3653 | HZ * acb->eeprom.delay_time; |
| 3654 | |
| 3655 | clear_fifo(acb, "scsi_reset_detect"); |
| 3656 | set_basic_config(acb); |
| 3657 | /*1.25 */ |
| 3658 | /*DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_HWRESELECT); */ |
| 3659 | |
| 3660 | if (acb->acb_flag & RESET_DEV) { /* RESET_DETECT, RESET_DONE, RESET_DEV */ |
| 3661 | acb->acb_flag |= RESET_DONE; |
| 3662 | } else { |
| 3663 | acb->acb_flag |= RESET_DETECT; |
| 3664 | reset_dev_param(acb); |
| 3665 | doing_srb_done(acb, DID_RESET, NULL, 1); |
| 3666 | /*DC395x_RecoverSRB( acb ); */ |
| 3667 | acb->active_dcb = NULL; |
| 3668 | acb->acb_flag = 0; |
| 3669 | waiting_process_next(acb); |
| 3670 | } |
| 3671 | } |
| 3672 | |
| 3673 | |
| 3674 | static void request_sense(struct AdapterCtlBlk *acb, struct DeviceCtlBlk *dcb, |
| 3675 | struct ScsiReqBlk *srb) |
| 3676 | { |
| 3677 | struct scsi_cmnd *cmd = srb->cmd; |
| 3678 | dprintkdbg(DBG_1, "request_sense: (pid#%li) <%02i-%i>\n", |
| 3679 | cmd->pid, cmd->device->id, cmd->device->lun); |
| 3680 | |
| 3681 | srb->flag |= AUTO_REQSENSE; |
| 3682 | srb->adapter_status = 0; |
| 3683 | srb->target_status = 0; |
| 3684 | |
| 3685 | /* KG: Can this prevent crap sense data ? */ |
| 3686 | memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); |
| 3687 | |
| 3688 | /* Save some data */ |
| 3689 | srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].address = |
| 3690 | srb->segment_x[0].address; |
| 3691 | srb->segment_x[DC395x_MAX_SG_LISTENTRY - 1].length = |
| 3692 | srb->segment_x[0].length; |
| 3693 | srb->xferred = srb->total_xfer_length; |
| 3694 | /* srb->segment_x : a one entry of S/G list table */ |
| 3695 | srb->total_xfer_length = sizeof(cmd->sense_buffer); |
| 3696 | srb->segment_x[0].length = sizeof(cmd->sense_buffer); |
| 3697 | /* Map sense buffer */ |
| 3698 | srb->segment_x[0].address = |
| 3699 | pci_map_single(acb->dev, cmd->sense_buffer, |
| 3700 | sizeof(cmd->sense_buffer), PCI_DMA_FROMDEVICE); |
| 3701 | dprintkdbg(DBG_SG, "request_sense: map buffer %p->%08x(%05x)\n", |
| 3702 | cmd->sense_buffer, srb->segment_x[0].address, |
| 3703 | sizeof(cmd->sense_buffer)); |
| 3704 | srb->sg_count = 1; |
| 3705 | srb->sg_index = 0; |
| 3706 | |
| 3707 | if (start_scsi(acb, dcb, srb)) { /* Should only happen, if sb. else grabs the bus */ |
| 3708 | dprintkl(KERN_DEBUG, |
| 3709 | "request_sense: (pid#%li) failed <%02i-%i>\n", |
| 3710 | srb->cmd->pid, dcb->target_id, dcb->target_lun); |
| 3711 | srb_going_to_waiting_move(dcb, srb); |
| 3712 | waiting_set_timer(acb, HZ / 100); |
| 3713 | } |
| 3714 | } |
| 3715 | |
| 3716 | |
| 3717 | /** |
| 3718 | * device_alloc - Allocate a new device instance. This create the |
| 3719 | * devices instance and sets up all the data items. The adapter |
| 3720 | * instance is required to obtain confiuration information for this |
| 3721 | * device. This does *not* add this device to the adapters device |
| 3722 | * list. |
| 3723 | * |
| 3724 | * @acb: The adapter to obtain configuration information from. |
| 3725 | * @target: The target for the new device. |
| 3726 | * @lun: The lun for the new device. |
| 3727 | * |
| 3728 | * Return the new device if succesfull or NULL on failure. |
| 3729 | **/ |
| 3730 | static struct DeviceCtlBlk *device_alloc(struct AdapterCtlBlk *acb, |
| 3731 | u8 target, u8 lun) |
| 3732 | { |
| 3733 | struct NvRamType *eeprom = &acb->eeprom; |
| 3734 | u8 period_index = eeprom->target[target].period & 0x07; |
| 3735 | struct DeviceCtlBlk *dcb; |
| 3736 | |
| 3737 | dcb = kmalloc(sizeof(struct DeviceCtlBlk), GFP_ATOMIC); |
| 3738 | dprintkdbg(DBG_0, "device_alloc: <%02i-%i>\n", target, lun); |
| 3739 | if (!dcb) |
| 3740 | return NULL; |
| 3741 | dcb->acb = NULL; |
| 3742 | INIT_LIST_HEAD(&dcb->srb_going_list); |
| 3743 | INIT_LIST_HEAD(&dcb->srb_waiting_list); |
| 3744 | dcb->active_srb = NULL; |
| 3745 | dcb->tag_mask = 0; |
| 3746 | dcb->max_command = 1; |
| 3747 | dcb->target_id = target; |
| 3748 | dcb->target_lun = lun; |
| 3749 | #ifndef DC395x_NO_DISCONNECT |
| 3750 | dcb->identify_msg = |
| 3751 | IDENTIFY(dcb->dev_mode & NTC_DO_DISCONNECT, lun); |
| 3752 | #else |
| 3753 | dcb->identify_msg = IDENTIFY(0, lun); |
| 3754 | #endif |
| 3755 | dcb->dev_mode = eeprom->target[target].cfg0; |
| 3756 | dcb->inquiry7 = 0; |
| 3757 | dcb->sync_mode = 0; |
| 3758 | dcb->min_nego_period = clock_period[period_index]; |
| 3759 | dcb->sync_period = 0; |
| 3760 | dcb->sync_offset = 0; |
| 3761 | dcb->flag = 0; |
| 3762 | |
| 3763 | #ifndef DC395x_NO_WIDE |
| 3764 | if ((dcb->dev_mode & NTC_DO_WIDE_NEGO) |
| 3765 | && (acb->config & HCC_WIDE_CARD)) |
| 3766 | dcb->sync_mode |= WIDE_NEGO_ENABLE; |
| 3767 | #endif |
| 3768 | #ifndef DC395x_NO_SYNC |
| 3769 | if (dcb->dev_mode & NTC_DO_SYNC_NEGO) |
| 3770 | if (!(lun) || current_sync_offset) |
| 3771 | dcb->sync_mode |= SYNC_NEGO_ENABLE; |
| 3772 | #endif |
| 3773 | if (dcb->target_lun != 0) { |
| 3774 | /* Copy settings */ |
| 3775 | struct DeviceCtlBlk *p; |
| 3776 | list_for_each_entry(p, &acb->dcb_list, list) |
| 3777 | if (p->target_id == dcb->target_id) |
| 3778 | break; |
| 3779 | dprintkdbg(DBG_1, |
| 3780 | "device_alloc: <%02i-%i> copy from <%02i-%i>\n", |
| 3781 | dcb->target_id, dcb->target_lun, |
| 3782 | p->target_id, p->target_lun); |
| 3783 | dcb->sync_mode = p->sync_mode; |
| 3784 | dcb->sync_period = p->sync_period; |
| 3785 | dcb->min_nego_period = p->min_nego_period; |
| 3786 | dcb->sync_offset = p->sync_offset; |
| 3787 | dcb->inquiry7 = p->inquiry7; |
| 3788 | } |
| 3789 | return dcb; |
| 3790 | } |
| 3791 | |
| 3792 | |
| 3793 | /** |
| 3794 | * adapter_add_device - Adds the device instance to the adaptor instance. |
| 3795 | * |
| 3796 | * @acb: The adapter device to be updated |
| 3797 | * @dcb: A newly created and intialised device instance to add. |
| 3798 | **/ |
| 3799 | static void adapter_add_device(struct AdapterCtlBlk *acb, |
| 3800 | struct DeviceCtlBlk *dcb) |
| 3801 | { |
| 3802 | /* backpointer to adapter */ |
| 3803 | dcb->acb = acb; |
| 3804 | |
| 3805 | /* set run_robin to this device if it is currently empty */ |
| 3806 | if (list_empty(&acb->dcb_list)) |
| 3807 | acb->dcb_run_robin = dcb; |
| 3808 | |
| 3809 | /* add device to list */ |
| 3810 | list_add_tail(&dcb->list, &acb->dcb_list); |
| 3811 | |
| 3812 | /* update device maps */ |
| 3813 | acb->dcb_map[dcb->target_id] |= (1 << dcb->target_lun); |
| 3814 | acb->children[dcb->target_id][dcb->target_lun] = dcb; |
| 3815 | } |
| 3816 | |
| 3817 | |
| 3818 | /** |
| 3819 | * adapter_remove_device - Removes the device instance from the adaptor |
| 3820 | * instance. The device instance is not check in any way or freed by this. |
| 3821 | * The caller is expected to take care of that. This will simply remove the |
| 3822 | * device from the adapters data strcutures. |
| 3823 | * |
| 3824 | * @acb: The adapter device to be updated |
| 3825 | * @dcb: A device that has previously been added to the adapter. |
| 3826 | **/ |
| 3827 | static void adapter_remove_device(struct AdapterCtlBlk *acb, |
| 3828 | struct DeviceCtlBlk *dcb) |
| 3829 | { |
| 3830 | struct DeviceCtlBlk *i; |
| 3831 | struct DeviceCtlBlk *tmp; |
| 3832 | dprintkdbg(DBG_0, "adapter_remove_device: <%02i-%i>\n", |
| 3833 | dcb->target_id, dcb->target_lun); |
| 3834 | |
| 3835 | /* fix up any pointers to this device that we have in the adapter */ |
| 3836 | if (acb->active_dcb == dcb) |
| 3837 | acb->active_dcb = NULL; |
| 3838 | if (acb->dcb_run_robin == dcb) |
| 3839 | acb->dcb_run_robin = dcb_get_next(&acb->dcb_list, dcb); |
| 3840 | |
| 3841 | /* unlink from list */ |
| 3842 | list_for_each_entry_safe(i, tmp, &acb->dcb_list, list) |
| 3843 | if (dcb == i) { |
| 3844 | list_del(&i->list); |
| 3845 | break; |
| 3846 | } |
| 3847 | |
| 3848 | /* clear map and children */ |
| 3849 | acb->dcb_map[dcb->target_id] &= ~(1 << dcb->target_lun); |
| 3850 | acb->children[dcb->target_id][dcb->target_lun] = NULL; |
| 3851 | dcb->acb = NULL; |
| 3852 | } |
| 3853 | |
| 3854 | |
| 3855 | /** |
| 3856 | * adapter_remove_and_free_device - Removes a single device from the adapter |
| 3857 | * and then frees the device information. |
| 3858 | * |
| 3859 | * @acb: The adapter device to be updated |
| 3860 | * @dcb: A device that has previously been added to the adapter. |
| 3861 | */ |
| 3862 | static void adapter_remove_and_free_device(struct AdapterCtlBlk *acb, |
| 3863 | struct DeviceCtlBlk *dcb) |
| 3864 | { |
| 3865 | if (list_size(&dcb->srb_going_list) > 1) { |
| 3866 | dprintkdbg(DBG_1, "adapter_remove_and_free_device: <%02i-%i> " |
| 3867 | "Won't remove because of %i active requests.\n", |
| 3868 | dcb->target_id, dcb->target_lun, |
| 3869 | list_size(&dcb->srb_going_list)); |
| 3870 | return; |
| 3871 | } |
| 3872 | adapter_remove_device(acb, dcb); |
| 3873 | kfree(dcb); |
| 3874 | } |
| 3875 | |
| 3876 | |
| 3877 | /** |
| 3878 | * adapter_remove_and_free_all_devices - Removes and frees all of the |
| 3879 | * devices associated with the specified adapter. |
| 3880 | * |
| 3881 | * @acb: The adapter from which all devices should be removed. |
| 3882 | **/ |
| 3883 | static void adapter_remove_and_free_all_devices(struct AdapterCtlBlk* acb) |
| 3884 | { |
| 3885 | struct DeviceCtlBlk *dcb; |
| 3886 | struct DeviceCtlBlk *tmp; |
| 3887 | dprintkdbg(DBG_1, "adapter_remove_and_free_all_devices: num=%i\n", |
| 3888 | list_size(&acb->dcb_list)); |
| 3889 | |
| 3890 | list_for_each_entry_safe(dcb, tmp, &acb->dcb_list, list) |
| 3891 | adapter_remove_and_free_device(acb, dcb); |
| 3892 | } |
| 3893 | |
| 3894 | |
| 3895 | /** |
| 3896 | * dc395x_slave_alloc - Called by the scsi mid layer to tell us about a new |
| 3897 | * scsi device that we need to deal with. We allocate a new device and then |
| 3898 | * insert that device into the adapters device list. |
| 3899 | * |
| 3900 | * @scsi_device: The new scsi device that we need to handle. |
| 3901 | **/ |
| 3902 | static int dc395x_slave_alloc(struct scsi_device *scsi_device) |
| 3903 | { |
| 3904 | struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; |
| 3905 | struct DeviceCtlBlk *dcb; |
| 3906 | |
| 3907 | dcb = device_alloc(acb, scsi_device->id, scsi_device->lun); |
| 3908 | if (!dcb) |
| 3909 | return -ENOMEM; |
| 3910 | adapter_add_device(acb, dcb); |
| 3911 | |
| 3912 | return 0; |
| 3913 | } |
| 3914 | |
| 3915 | |
| 3916 | /** |
| 3917 | * dc395x_slave_destroy - Called by the scsi mid layer to tell us about a |
| 3918 | * device that is going away. |
| 3919 | * |
| 3920 | * @scsi_device: The new scsi device that we need to handle. |
| 3921 | **/ |
| 3922 | static void dc395x_slave_destroy(struct scsi_device *scsi_device) |
| 3923 | { |
| 3924 | struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)scsi_device->host->hostdata; |
| 3925 | struct DeviceCtlBlk *dcb = find_dcb(acb, scsi_device->id, scsi_device->lun); |
| 3926 | if (dcb) |
| 3927 | adapter_remove_and_free_device(acb, dcb); |
| 3928 | } |
| 3929 | |
| 3930 | |
| 3931 | |
| 3932 | |
| 3933 | /** |
| 3934 | * trms1040_wait_30us: wait for 30 us |
| 3935 | * |
| 3936 | * Waits for 30us (using the chip by the looks of it..) |
| 3937 | * |
| 3938 | * @io_port: base I/O address |
| 3939 | **/ |
| 3940 | static void __devinit trms1040_wait_30us(unsigned long io_port) |
| 3941 | { |
| 3942 | /* ScsiPortStallExecution(30); wait 30 us */ |
| 3943 | outb(5, io_port + TRM_S1040_GEN_TIMER); |
| 3944 | while (!(inb(io_port + TRM_S1040_GEN_STATUS) & GTIMEOUT)) |
| 3945 | /* nothing */ ; |
| 3946 | } |
| 3947 | |
| 3948 | |
| 3949 | /** |
| 3950 | * trms1040_write_cmd - write the secified command and address to |
| 3951 | * chip |
| 3952 | * |
| 3953 | * @io_port: base I/O address |
| 3954 | * @cmd: SB + op code (command) to send |
| 3955 | * @addr: address to send |
| 3956 | **/ |
| 3957 | static void __devinit trms1040_write_cmd(unsigned long io_port, u8 cmd, u8 addr) |
| 3958 | { |
| 3959 | int i; |
| 3960 | u8 send_data; |
| 3961 | |
| 3962 | /* program SB + OP code */ |
| 3963 | for (i = 0; i < 3; i++, cmd <<= 1) { |
| 3964 | send_data = NVR_SELECT; |
| 3965 | if (cmd & 0x04) /* Start from bit 2 */ |
| 3966 | send_data |= NVR_BITOUT; |
| 3967 | |
| 3968 | outb(send_data, io_port + TRM_S1040_GEN_NVRAM); |
| 3969 | trms1040_wait_30us(io_port); |
| 3970 | outb((send_data | NVR_CLOCK), |
| 3971 | io_port + TRM_S1040_GEN_NVRAM); |
| 3972 | trms1040_wait_30us(io_port); |
| 3973 | } |
| 3974 | |
| 3975 | /* send address */ |
| 3976 | for (i = 0; i < 7; i++, addr <<= 1) { |
| 3977 | send_data = NVR_SELECT; |
| 3978 | if (addr & 0x40) /* Start from bit 6 */ |
| 3979 | send_data |= NVR_BITOUT; |
| 3980 | |
| 3981 | outb(send_data, io_port + TRM_S1040_GEN_NVRAM); |
| 3982 | trms1040_wait_30us(io_port); |
| 3983 | outb((send_data | NVR_CLOCK), |
| 3984 | io_port + TRM_S1040_GEN_NVRAM); |
| 3985 | trms1040_wait_30us(io_port); |
| 3986 | } |
| 3987 | outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); |
| 3988 | trms1040_wait_30us(io_port); |
| 3989 | } |
| 3990 | |
| 3991 | |
| 3992 | /** |
| 3993 | * trms1040_set_data - store a single byte in the eeprom |
| 3994 | * |
| 3995 | * Called from write all to write a single byte into the SSEEPROM |
| 3996 | * Which is done one bit at a time. |
| 3997 | * |
| 3998 | * @io_port: base I/O address |
| 3999 | * @addr: offset into EEPROM |
| 4000 | * @byte: bytes to write |
| 4001 | **/ |
| 4002 | static void __devinit trms1040_set_data(unsigned long io_port, u8 addr, u8 byte) |
| 4003 | { |
| 4004 | int i; |
| 4005 | u8 send_data; |
| 4006 | |
| 4007 | /* Send write command & address */ |
| 4008 | trms1040_write_cmd(io_port, 0x05, addr); |
| 4009 | |
| 4010 | /* Write data */ |
| 4011 | for (i = 0; i < 8; i++, byte <<= 1) { |
| 4012 | send_data = NVR_SELECT; |
| 4013 | if (byte & 0x80) /* Start from bit 7 */ |
| 4014 | send_data |= NVR_BITOUT; |
| 4015 | |
| 4016 | outb(send_data, io_port + TRM_S1040_GEN_NVRAM); |
| 4017 | trms1040_wait_30us(io_port); |
| 4018 | outb((send_data | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); |
| 4019 | trms1040_wait_30us(io_port); |
| 4020 | } |
| 4021 | outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); |
| 4022 | trms1040_wait_30us(io_port); |
| 4023 | |
| 4024 | /* Disable chip select */ |
| 4025 | outb(0, io_port + TRM_S1040_GEN_NVRAM); |
| 4026 | trms1040_wait_30us(io_port); |
| 4027 | |
| 4028 | outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); |
| 4029 | trms1040_wait_30us(io_port); |
| 4030 | |
| 4031 | /* Wait for write ready */ |
| 4032 | while (1) { |
| 4033 | outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); |
| 4034 | trms1040_wait_30us(io_port); |
| 4035 | |
| 4036 | outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); |
| 4037 | trms1040_wait_30us(io_port); |
| 4038 | |
| 4039 | if (inb(io_port + TRM_S1040_GEN_NVRAM) & NVR_BITIN) |
| 4040 | break; |
| 4041 | } |
| 4042 | |
| 4043 | /* Disable chip select */ |
| 4044 | outb(0, io_port + TRM_S1040_GEN_NVRAM); |
| 4045 | } |
| 4046 | |
| 4047 | |
| 4048 | /** |
| 4049 | * trms1040_write_all - write 128 bytes to the eeprom |
| 4050 | * |
| 4051 | * Write the supplied 128 bytes to the chips SEEPROM |
| 4052 | * |
| 4053 | * @eeprom: the data to write |
| 4054 | * @io_port: the base io port |
| 4055 | **/ |
| 4056 | static void __devinit trms1040_write_all(struct NvRamType *eeprom, unsigned long io_port) |
| 4057 | { |
| 4058 | u8 *b_eeprom = (u8 *)eeprom; |
| 4059 | u8 addr; |
| 4060 | |
| 4061 | /* Enable SEEPROM */ |
| 4062 | outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), |
| 4063 | io_port + TRM_S1040_GEN_CONTROL); |
| 4064 | |
| 4065 | /* write enable */ |
| 4066 | trms1040_write_cmd(io_port, 0x04, 0xFF); |
| 4067 | outb(0, io_port + TRM_S1040_GEN_NVRAM); |
| 4068 | trms1040_wait_30us(io_port); |
| 4069 | |
| 4070 | /* write */ |
| 4071 | for (addr = 0; addr < 128; addr++, b_eeprom++) |
| 4072 | trms1040_set_data(io_port, addr, *b_eeprom); |
| 4073 | |
| 4074 | /* write disable */ |
| 4075 | trms1040_write_cmd(io_port, 0x04, 0x00); |
| 4076 | outb(0, io_port + TRM_S1040_GEN_NVRAM); |
| 4077 | trms1040_wait_30us(io_port); |
| 4078 | |
| 4079 | /* Disable SEEPROM */ |
| 4080 | outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), |
| 4081 | io_port + TRM_S1040_GEN_CONTROL); |
| 4082 | } |
| 4083 | |
| 4084 | |
| 4085 | /** |
| 4086 | * trms1040_get_data - get a single byte from the eeprom |
| 4087 | * |
| 4088 | * Called from read all to read a single byte into the SSEEPROM |
| 4089 | * Which is done one bit at a time. |
| 4090 | * |
| 4091 | * @io_port: base I/O address |
| 4092 | * @addr: offset into SEEPROM |
| 4093 | * |
| 4094 | * Returns the the byte read. |
| 4095 | **/ |
| 4096 | static u8 __devinit trms1040_get_data(unsigned long io_port, u8 addr) |
| 4097 | { |
| 4098 | int i; |
| 4099 | u8 read_byte; |
| 4100 | u8 result = 0; |
| 4101 | |
| 4102 | /* Send read command & address */ |
| 4103 | trms1040_write_cmd(io_port, 0x06, addr); |
| 4104 | |
| 4105 | /* read data */ |
| 4106 | for (i = 0; i < 8; i++) { |
| 4107 | outb((NVR_SELECT | NVR_CLOCK), io_port + TRM_S1040_GEN_NVRAM); |
| 4108 | trms1040_wait_30us(io_port); |
| 4109 | outb(NVR_SELECT, io_port + TRM_S1040_GEN_NVRAM); |
| 4110 | |
| 4111 | /* Get data bit while falling edge */ |
| 4112 | read_byte = inb(io_port + TRM_S1040_GEN_NVRAM); |
| 4113 | result <<= 1; |
| 4114 | if (read_byte & NVR_BITIN) |
| 4115 | result |= 1; |
| 4116 | |
| 4117 | trms1040_wait_30us(io_port); |
| 4118 | } |
| 4119 | |
| 4120 | /* Disable chip select */ |
| 4121 | outb(0, io_port + TRM_S1040_GEN_NVRAM); |
| 4122 | return result; |
| 4123 | } |
| 4124 | |
| 4125 | |
| 4126 | /** |
| 4127 | * trms1040_read_all - read all bytes from the eeprom |
| 4128 | * |
| 4129 | * Read the 128 bytes from the SEEPROM. |
| 4130 | * |
| 4131 | * @eeprom: where to store the data |
| 4132 | * @io_port: the base io port |
| 4133 | **/ |
| 4134 | static void __devinit trms1040_read_all(struct NvRamType *eeprom, unsigned long io_port) |
| 4135 | { |
| 4136 | u8 *b_eeprom = (u8 *)eeprom; |
| 4137 | u8 addr; |
| 4138 | |
| 4139 | /* Enable SEEPROM */ |
| 4140 | outb((inb(io_port + TRM_S1040_GEN_CONTROL) | EN_EEPROM), |
| 4141 | io_port + TRM_S1040_GEN_CONTROL); |
| 4142 | |
| 4143 | /* read details */ |
| 4144 | for (addr = 0; addr < 128; addr++, b_eeprom++) |
| 4145 | *b_eeprom = trms1040_get_data(io_port, addr); |
| 4146 | |
| 4147 | /* Disable SEEPROM */ |
| 4148 | outb((inb(io_port + TRM_S1040_GEN_CONTROL) & ~EN_EEPROM), |
| 4149 | io_port + TRM_S1040_GEN_CONTROL); |
| 4150 | } |
| 4151 | |
| 4152 | |
| 4153 | |
| 4154 | /** |
| 4155 | * check_eeprom - get and check contents of the eeprom |
| 4156 | * |
| 4157 | * Read seeprom 128 bytes into the memory provider in eeprom. |
| 4158 | * Checks the checksum and if it's not correct it uses a set of default |
| 4159 | * values. |
| 4160 | * |
| 4161 | * @eeprom: caller allocated strcuture to read the eeprom data into |
| 4162 | * @io_port: io port to read from |
| 4163 | **/ |
| 4164 | static void __devinit check_eeprom(struct NvRamType *eeprom, unsigned long io_port) |
| 4165 | { |
| 4166 | u16 *w_eeprom = (u16 *)eeprom; |
| 4167 | u16 w_addr; |
| 4168 | u16 cksum; |
| 4169 | u32 d_addr; |
| 4170 | u32 *d_eeprom; |
| 4171 | |
| 4172 | trms1040_read_all(eeprom, io_port); /* read eeprom */ |
| 4173 | |
| 4174 | cksum = 0; |
| 4175 | for (w_addr = 0, w_eeprom = (u16 *)eeprom; w_addr < 64; |
| 4176 | w_addr++, w_eeprom++) |
| 4177 | cksum += *w_eeprom; |
| 4178 | if (cksum != 0x1234) { |
| 4179 | /* |
| 4180 | * Checksum is wrong. |
| 4181 | * Load a set of defaults into the eeprom buffer |
| 4182 | */ |
| 4183 | dprintkl(KERN_WARNING, |
| 4184 | "EEProm checksum error: using default values and options.\n"); |
| 4185 | eeprom->sub_vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; |
| 4186 | eeprom->sub_vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); |
| 4187 | eeprom->sub_sys_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; |
| 4188 | eeprom->sub_sys_id[1] = |
| 4189 | (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); |
| 4190 | eeprom->sub_class = 0x00; |
| 4191 | eeprom->vendor_id[0] = (u8)PCI_VENDOR_ID_TEKRAM; |
| 4192 | eeprom->vendor_id[1] = (u8)(PCI_VENDOR_ID_TEKRAM >> 8); |
| 4193 | eeprom->device_id[0] = (u8)PCI_DEVICE_ID_TEKRAM_TRMS1040; |
| 4194 | eeprom->device_id[1] = |
| 4195 | (u8)(PCI_DEVICE_ID_TEKRAM_TRMS1040 >> 8); |
| 4196 | eeprom->reserved = 0x00; |
| 4197 | |
| 4198 | for (d_addr = 0, d_eeprom = (u32 *)eeprom->target; |
| 4199 | d_addr < 16; d_addr++, d_eeprom++) |
| 4200 | *d_eeprom = 0x00000077; /* cfg3,cfg2,period,cfg0 */ |
| 4201 | |
| 4202 | *d_eeprom++ = 0x04000F07; /* max_tag,delay_time,channel_cfg,scsi_id */ |
| 4203 | *d_eeprom++ = 0x00000015; /* reserved1,boot_lun,boot_target,reserved0 */ |
| 4204 | for (d_addr = 0; d_addr < 12; d_addr++, d_eeprom++) |
| 4205 | *d_eeprom = 0x00; |
| 4206 | |
| 4207 | /* Now load defaults (maybe set by boot/module params) */ |
| 4208 | set_safe_settings(); |
| 4209 | fix_settings(); |
| 4210 | eeprom_override(eeprom); |
| 4211 | |
| 4212 | eeprom->cksum = 0x00; |
| 4213 | for (w_addr = 0, cksum = 0, w_eeprom = (u16 *)eeprom; |
| 4214 | w_addr < 63; w_addr++, w_eeprom++) |
| 4215 | cksum += *w_eeprom; |
| 4216 | |
| 4217 | *w_eeprom = 0x1234 - cksum; |
| 4218 | trms1040_write_all(eeprom, io_port); |
| 4219 | eeprom->delay_time = cfg_data[CFG_RESET_DELAY].value; |
| 4220 | } else { |
| 4221 | set_safe_settings(); |
| 4222 | eeprom_index_to_delay(eeprom); |
| 4223 | eeprom_override(eeprom); |
| 4224 | } |
| 4225 | } |
| 4226 | |
| 4227 | |
| 4228 | /** |
| 4229 | * print_eeprom_settings - output the eeprom settings |
| 4230 | * to the kernel log so people can see what they were. |
| 4231 | * |
| 4232 | * @eeprom: The eeprom data strucutre to show details for. |
| 4233 | **/ |
| 4234 | static void __devinit print_eeprom_settings(struct NvRamType *eeprom) |
| 4235 | { |
| 4236 | dprintkl(KERN_INFO, "Used settings: AdapterID=%02i, Speed=%i(%02i.%01iMHz), dev_mode=0x%02x\n", |
| 4237 | eeprom->scsi_id, |
| 4238 | eeprom->target[0].period, |
| 4239 | clock_speed[eeprom->target[0].period] / 10, |
| 4240 | clock_speed[eeprom->target[0].period] % 10, |
| 4241 | eeprom->target[0].cfg0); |
| 4242 | dprintkl(KERN_INFO, " AdaptMode=0x%02x, Tags=%i(%02i), DelayReset=%is\n", |
| 4243 | eeprom->channel_cfg, eeprom->max_tag, |
| 4244 | 1 << eeprom->max_tag, eeprom->delay_time); |
| 4245 | } |
| 4246 | |
| 4247 | |
| 4248 | /* Free SG tables */ |
| 4249 | static void adapter_sg_tables_free(struct AdapterCtlBlk *acb) |
| 4250 | { |
| 4251 | int i; |
| 4252 | const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; |
| 4253 | |
| 4254 | for (i = 0; i < DC395x_MAX_SRB_CNT; i += srbs_per_page) |
| 4255 | kfree(acb->srb_array[i].segment_x); |
| 4256 | |
| 4257 | vfree(acb->srb_array[0].virt_map); |
| 4258 | } |
| 4259 | |
| 4260 | |
| 4261 | /* |
| 4262 | * Allocate SG tables; as we have to pci_map them, an SG list (struct SGentry*) |
| 4263 | * should never cross a page boundary */ |
| 4264 | static int __devinit adapter_sg_tables_alloc(struct AdapterCtlBlk *acb) |
| 4265 | { |
| 4266 | const unsigned mem_needed = (DC395x_MAX_SRB_CNT+1) |
| 4267 | *SEGMENTX_LEN; |
| 4268 | int pages = (mem_needed+(PAGE_SIZE-1))/PAGE_SIZE; |
| 4269 | const unsigned srbs_per_page = PAGE_SIZE/SEGMENTX_LEN; |
| 4270 | int srb_idx = 0; |
| 4271 | unsigned i = 0; |
| 4272 | struct SGentry *ptr; |
| 4273 | void **virt_array; |
| 4274 | |
| 4275 | for (i = 0; i < DC395x_MAX_SRB_CNT; i++) { |
| 4276 | acb->srb_array[i].segment_x = NULL; |
| 4277 | acb->srb_array[i].virt_map = NULL; |
| 4278 | } |
| 4279 | |
| 4280 | dprintkdbg(DBG_1, "Allocate %i pages for SG tables\n", pages); |
| 4281 | while (pages--) { |
| 4282 | ptr = (struct SGentry *)kmalloc(PAGE_SIZE, GFP_KERNEL); |
| 4283 | if (!ptr) { |
| 4284 | adapter_sg_tables_free(acb); |
| 4285 | return 1; |
| 4286 | } |
| 4287 | dprintkdbg(DBG_1, "Allocate %li bytes at %p for SG segments %i\n", |
| 4288 | PAGE_SIZE, ptr, srb_idx); |
| 4289 | i = 0; |
| 4290 | while (i < srbs_per_page && srb_idx < DC395x_MAX_SRB_CNT) |
| 4291 | acb->srb_array[srb_idx++].segment_x = |
| 4292 | ptr + (i++ * DC395x_MAX_SG_LISTENTRY); |
| 4293 | } |
| 4294 | if (i < srbs_per_page) |
| 4295 | acb->srb.segment_x = |
| 4296 | ptr + (i * DC395x_MAX_SG_LISTENTRY); |
| 4297 | else |
| 4298 | dprintkl(KERN_DEBUG, "No space for tmsrb SG table reserved?!\n"); |
| 4299 | |
| 4300 | virt_array = vmalloc((DC395x_MAX_SRB_CNT + 1) * DC395x_MAX_SG_LISTENTRY * sizeof(void*)); |
| 4301 | |
| 4302 | if (!virt_array) { |
| 4303 | adapter_sg_tables_free(acb); |
| 4304 | return 1; |
| 4305 | } |
| 4306 | |
| 4307 | for (i = 0; i < DC395x_MAX_SRB_CNT + 1; i++) { |
| 4308 | acb->srb_array[i].virt_map = virt_array; |
| 4309 | virt_array += DC395x_MAX_SG_LISTENTRY; |
| 4310 | } |
| 4311 | |
| 4312 | return 0; |
| 4313 | } |
| 4314 | |
| 4315 | |
| 4316 | |
| 4317 | /** |
| 4318 | * adapter_print_config - print adapter connection and termination |
| 4319 | * config |
| 4320 | * |
| 4321 | * The io port in the adapter needs to have been set before calling |
| 4322 | * this function. |
| 4323 | * |
| 4324 | * @acb: The adapter to print the information for. |
| 4325 | **/ |
| 4326 | static void __devinit adapter_print_config(struct AdapterCtlBlk *acb) |
| 4327 | { |
| 4328 | u8 bval; |
| 4329 | |
| 4330 | bval = DC395x_read8(acb, TRM_S1040_GEN_STATUS); |
| 4331 | dprintkl(KERN_INFO, "%sConnectors: ", |
| 4332 | ((bval & WIDESCSI) ? "(Wide) " : "")); |
| 4333 | if (!(bval & CON5068)) |
| 4334 | printk("ext%s ", !(bval & EXT68HIGH) ? "68" : "50"); |
| 4335 | if (!(bval & CON68)) |
| 4336 | printk("int68%s ", !(bval & INT68HIGH) ? "" : "(50)"); |
| 4337 | if (!(bval & CON50)) |
| 4338 | printk("int50 "); |
| 4339 | if ((bval & (CON5068 | CON50 | CON68)) == |
| 4340 | 0 /*(CON5068 | CON50 | CON68) */ ) |
| 4341 | printk(" Oops! (All 3?) "); |
| 4342 | bval = DC395x_read8(acb, TRM_S1040_GEN_CONTROL); |
| 4343 | printk(" Termination: "); |
| 4344 | if (bval & DIS_TERM) |
| 4345 | printk("Disabled\n"); |
| 4346 | else { |
| 4347 | if (bval & AUTOTERM) |
| 4348 | printk("Auto "); |
| 4349 | if (bval & LOW8TERM) |
| 4350 | printk("Low "); |
| 4351 | if (bval & UP8TERM) |
| 4352 | printk("High "); |
| 4353 | printk("\n"); |
| 4354 | } |
| 4355 | } |
| 4356 | |
| 4357 | |
| 4358 | /** |
| 4359 | * adapter_init_params - Initialize the various parameters in the |
| 4360 | * adapter structure. Note that the pointer to the scsi_host is set |
| 4361 | * early (when this instance is created) and the io_port and irq |
| 4362 | * values are set later after they have been reserved. This just gets |
| 4363 | * everything set to a good starting position. |
| 4364 | * |
| 4365 | * The eeprom structure in the adapter needs to have been set before |
| 4366 | * calling this function. |
| 4367 | * |
| 4368 | * @acb: The adapter to initialize. |
| 4369 | **/ |
| 4370 | static void __devinit adapter_init_params(struct AdapterCtlBlk *acb) |
| 4371 | { |
| 4372 | struct NvRamType *eeprom = &acb->eeprom; |
| 4373 | int i; |
| 4374 | |
| 4375 | /* NOTE: acb->scsi_host is set at scsi_host/acb creation time */ |
| 4376 | /* NOTE: acb->io_port_base is set at port registration time */ |
| 4377 | /* NOTE: acb->io_port_len is set at port registration time */ |
| 4378 | |
| 4379 | INIT_LIST_HEAD(&acb->dcb_list); |
| 4380 | acb->dcb_run_robin = NULL; |
| 4381 | acb->active_dcb = NULL; |
| 4382 | |
| 4383 | INIT_LIST_HEAD(&acb->srb_free_list); |
| 4384 | /* temp SRB for Q tag used or abort command used */ |
| 4385 | acb->tmp_srb = &acb->srb; |
| 4386 | init_timer(&acb->waiting_timer); |
| 4387 | init_timer(&acb->selto_timer); |
| 4388 | |
| 4389 | acb->srb_count = DC395x_MAX_SRB_CNT; |
| 4390 | |
| 4391 | acb->sel_timeout = DC395x_SEL_TIMEOUT; /* timeout=250ms */ |
| 4392 | /* NOTE: acb->irq_level is set at IRQ registration time */ |
| 4393 | |
| 4394 | acb->tag_max_num = 1 << eeprom->max_tag; |
| 4395 | if (acb->tag_max_num > 30) |
| 4396 | acb->tag_max_num = 30; |
| 4397 | |
| 4398 | acb->acb_flag = 0; /* RESET_DETECT, RESET_DONE, RESET_DEV */ |
| 4399 | acb->gmode2 = eeprom->channel_cfg; |
| 4400 | acb->config = 0; /* NOTE: actually set in adapter_init_chip */ |
| 4401 | |
| 4402 | if (eeprom->channel_cfg & NAC_SCANLUN) |
| 4403 | acb->lun_chk = 1; |
| 4404 | acb->scan_devices = 1; |
| 4405 | |
| 4406 | acb->scsi_host->this_id = eeprom->scsi_id; |
| 4407 | acb->hostid_bit = (1 << acb->scsi_host->this_id); |
| 4408 | |
| 4409 | for (i = 0; i < DC395x_MAX_SCSI_ID; i++) |
| 4410 | acb->dcb_map[i] = 0; |
| 4411 | |
| 4412 | acb->msg_len = 0; |
| 4413 | |
| 4414 | /* link static array of srbs into the srb free list */ |
| 4415 | for (i = 0; i < acb->srb_count - 1; i++) |
| 4416 | srb_free_insert(acb, &acb->srb_array[i]); |
| 4417 | } |
| 4418 | |
| 4419 | |
| 4420 | /** |
| 4421 | * adapter_init_host - Initialize the scsi host instance based on |
| 4422 | * values that we have already stored in the adapter instance. There's |
| 4423 | * some mention that a lot of these are deprecated, so we won't use |
| 4424 | * them (we'll use the ones in the adapter instance) but we'll fill |
| 4425 | * them in in case something else needs them. |
| 4426 | * |
| 4427 | * The eeprom structure, irq and io ports in the adapter need to have |
| 4428 | * been set before calling this function. |
| 4429 | * |
| 4430 | * @host: The scsi host instance to fill in the values for. |
| 4431 | **/ |
| 4432 | static void __devinit adapter_init_scsi_host(struct Scsi_Host *host) |
| 4433 | { |
| 4434 | struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; |
| 4435 | struct NvRamType *eeprom = &acb->eeprom; |
| 4436 | |
| 4437 | host->max_cmd_len = 24; |
| 4438 | host->can_queue = DC395x_MAX_CMD_QUEUE; |
| 4439 | host->cmd_per_lun = DC395x_MAX_CMD_PER_LUN; |
| 4440 | host->this_id = (int)eeprom->scsi_id; |
| 4441 | host->io_port = acb->io_port_base; |
| 4442 | host->n_io_port = acb->io_port_len; |
| 4443 | host->dma_channel = -1; |
| 4444 | host->unique_id = acb->io_port_base; |
| 4445 | host->irq = acb->irq_level; |
| 4446 | host->last_reset = jiffies; |
| 4447 | |
| 4448 | host->max_id = 16; |
| 4449 | if (host->max_id - 1 == eeprom->scsi_id) |
| 4450 | host->max_id--; |
| 4451 | |
| 4452 | #ifdef CONFIG_SCSI_MULTI_LUN |
| 4453 | if (eeprom->channel_cfg & NAC_SCANLUN) |
| 4454 | host->max_lun = 8; |
| 4455 | else |
| 4456 | host->max_lun = 1; |
| 4457 | #else |
| 4458 | host->max_lun = 1; |
| 4459 | #endif |
| 4460 | |
| 4461 | } |
| 4462 | |
| 4463 | |
| 4464 | /** |
| 4465 | * adapter_init_chip - Get the chip into a know state and figure out |
| 4466 | * some of the settings that apply to this adapter. |
| 4467 | * |
| 4468 | * The io port in the adapter needs to have been set before calling |
| 4469 | * this function. The config will be configured correctly on return. |
| 4470 | * |
| 4471 | * @acb: The adapter which we are to init. |
| 4472 | **/ |
| 4473 | static void __devinit adapter_init_chip(struct AdapterCtlBlk *acb) |
| 4474 | { |
| 4475 | struct NvRamType *eeprom = &acb->eeprom; |
| 4476 | |
| 4477 | /* Mask all the interrupt */ |
| 4478 | DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0x00); |
| 4479 | DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0x00); |
| 4480 | |
| 4481 | /* Reset SCSI module */ |
| 4482 | DC395x_write16(acb, TRM_S1040_SCSI_CONTROL, DO_RSTMODULE); |
| 4483 | |
| 4484 | /* Reset PCI/DMA module */ |
| 4485 | DC395x_write8(acb, TRM_S1040_DMA_CONTROL, DMARESETMODULE); |
| 4486 | udelay(20); |
| 4487 | |
| 4488 | /* program configuration 0 */ |
| 4489 | acb->config = HCC_AUTOTERM | HCC_PARITY; |
| 4490 | if (DC395x_read8(acb, TRM_S1040_GEN_STATUS) & WIDESCSI) |
| 4491 | acb->config |= HCC_WIDE_CARD; |
| 4492 | |
| 4493 | if (eeprom->channel_cfg & NAC_POWERON_SCSI_RESET) |
| 4494 | acb->config |= HCC_SCSI_RESET; |
| 4495 | |
| 4496 | if (acb->config & HCC_SCSI_RESET) { |
| 4497 | dprintkl(KERN_INFO, "Performing initial SCSI bus reset\n"); |
| 4498 | DC395x_write8(acb, TRM_S1040_SCSI_CONTROL, DO_RSTSCSI); |
| 4499 | |
| 4500 | /*while (!( DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS) & INT_SCSIRESET )); */ |
| 4501 | /*spin_unlock_irq (&io_request_lock); */ |
| 4502 | udelay(500); |
| 4503 | |
| 4504 | acb->scsi_host->last_reset = |
| 4505 | jiffies + HZ / 2 + |
| 4506 | HZ * acb->eeprom.delay_time; |
| 4507 | |
| 4508 | /*spin_lock_irq (&io_request_lock); */ |
| 4509 | } |
| 4510 | } |
| 4511 | |
| 4512 | |
| 4513 | /** |
| 4514 | * init_adapter - Grab the resource for the card, setup the adapter |
| 4515 | * information, set the card into a known state, create the various |
| 4516 | * tables etc etc. This basically gets all adapter information all up |
| 4517 | * to date, intialised and gets the chip in sync with it. |
| 4518 | * |
| 4519 | * @host: This hosts adapter structure |
| 4520 | * @io_port: The base I/O port |
| 4521 | * @irq: IRQ |
| 4522 | * |
| 4523 | * Returns 0 if the initialization succeeds, any other value on |
| 4524 | * failure. |
| 4525 | **/ |
| 4526 | static int __devinit adapter_init(struct AdapterCtlBlk *acb, |
| 4527 | unsigned long io_port, u32 io_port_len, unsigned int irq) |
| 4528 | { |
| 4529 | if (!request_region(io_port, io_port_len, DC395X_NAME)) { |
| 4530 | dprintkl(KERN_ERR, "Failed to reserve IO region 0x%lx\n", io_port); |
| 4531 | goto failed; |
| 4532 | } |
| 4533 | /* store port base to indicate we have registered it */ |
| 4534 | acb->io_port_base = io_port; |
| 4535 | acb->io_port_len = io_port_len; |
| 4536 | |
| 4537 | if (request_irq(irq, dc395x_interrupt, SA_SHIRQ, DC395X_NAME, acb)) { |
| 4538 | /* release the region we just claimed */ |
| 4539 | dprintkl(KERN_INFO, "Failed to register IRQ\n"); |
| 4540 | goto failed; |
| 4541 | } |
| 4542 | /* store irq to indicate we have registered it */ |
| 4543 | acb->irq_level = irq; |
| 4544 | |
| 4545 | /* get eeprom configuration information and command line settings etc */ |
| 4546 | check_eeprom(&acb->eeprom, io_port); |
| 4547 | print_eeprom_settings(&acb->eeprom); |
| 4548 | |
| 4549 | /* setup adapter control block */ |
| 4550 | adapter_init_params(acb); |
| 4551 | |
| 4552 | /* display card connectors/termination settings */ |
| 4553 | adapter_print_config(acb); |
| 4554 | |
| 4555 | if (adapter_sg_tables_alloc(acb)) { |
| 4556 | dprintkl(KERN_DEBUG, "Memory allocation for SG tables failed\n"); |
| 4557 | goto failed; |
| 4558 | } |
| 4559 | adapter_init_scsi_host(acb->scsi_host); |
| 4560 | adapter_init_chip(acb); |
| 4561 | set_basic_config(acb); |
| 4562 | |
| 4563 | dprintkdbg(DBG_0, |
| 4564 | "adapter_init: acb=%p, pdcb_map=%p psrb_array=%p " |
| 4565 | "size{acb=0x%04x dcb=0x%04x srb=0x%04x}\n", |
| 4566 | acb, acb->dcb_map, acb->srb_array, sizeof(struct AdapterCtlBlk), |
| 4567 | sizeof(struct DeviceCtlBlk), sizeof(struct ScsiReqBlk)); |
| 4568 | return 0; |
| 4569 | |
| 4570 | failed: |
| 4571 | if (acb->irq_level) |
| 4572 | free_irq(acb->irq_level, acb); |
| 4573 | if (acb->io_port_base) |
| 4574 | release_region(acb->io_port_base, acb->io_port_len); |
| 4575 | adapter_sg_tables_free(acb); |
| 4576 | |
| 4577 | return 1; |
| 4578 | } |
| 4579 | |
| 4580 | |
| 4581 | /** |
| 4582 | * adapter_uninit_chip - cleanly shut down the scsi controller chip, |
| 4583 | * stopping all operations and disabling interrupt generation on the |
| 4584 | * card. |
| 4585 | * |
| 4586 | * @acb: The adapter which we are to shutdown. |
| 4587 | **/ |
| 4588 | static void adapter_uninit_chip(struct AdapterCtlBlk *acb) |
| 4589 | { |
| 4590 | /* disable interrupts */ |
| 4591 | DC395x_write8(acb, TRM_S1040_DMA_INTEN, 0); |
| 4592 | DC395x_write8(acb, TRM_S1040_SCSI_INTEN, 0); |
| 4593 | |
| 4594 | /* reset the scsi bus */ |
| 4595 | if (acb->config & HCC_SCSI_RESET) |
| 4596 | reset_scsi_bus(acb); |
| 4597 | |
| 4598 | /* clear any pending interupt state */ |
| 4599 | DC395x_read8(acb, TRM_S1040_SCSI_INTSTATUS); |
| 4600 | } |
| 4601 | |
| 4602 | |
| 4603 | |
| 4604 | /** |
| 4605 | * adapter_uninit - Shut down the chip and release any resources that |
| 4606 | * we had allocated. Once this returns the adapter should not be used |
| 4607 | * anymore. |
| 4608 | * |
| 4609 | * @acb: The adapter which we are to un-initialize. |
| 4610 | **/ |
| 4611 | static void adapter_uninit(struct AdapterCtlBlk *acb) |
| 4612 | { |
| 4613 | unsigned long flags; |
| 4614 | DC395x_LOCK_IO(acb->scsi_host, flags); |
| 4615 | |
| 4616 | /* remove timers */ |
| 4617 | if (timer_pending(&acb->waiting_timer)) |
| 4618 | del_timer(&acb->waiting_timer); |
| 4619 | if (timer_pending(&acb->selto_timer)) |
| 4620 | del_timer(&acb->selto_timer); |
| 4621 | |
| 4622 | adapter_uninit_chip(acb); |
| 4623 | adapter_remove_and_free_all_devices(acb); |
| 4624 | DC395x_UNLOCK_IO(acb->scsi_host, flags); |
| 4625 | |
| 4626 | if (acb->irq_level) |
| 4627 | free_irq(acb->irq_level, acb); |
| 4628 | if (acb->io_port_base) |
| 4629 | release_region(acb->io_port_base, acb->io_port_len); |
| 4630 | |
| 4631 | adapter_sg_tables_free(acb); |
| 4632 | } |
| 4633 | |
| 4634 | |
| 4635 | #undef SPRINTF |
| 4636 | #define SPRINTF(args...) pos += sprintf(pos, args) |
| 4637 | |
| 4638 | #undef YESNO |
| 4639 | #define YESNO(YN) \ |
| 4640 | if (YN) SPRINTF(" Yes ");\ |
| 4641 | else SPRINTF(" No ") |
| 4642 | |
| 4643 | static int dc395x_proc_info(struct Scsi_Host *host, char *buffer, |
| 4644 | char **start, off_t offset, int length, int inout) |
| 4645 | { |
| 4646 | struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)host->hostdata; |
| 4647 | int spd, spd1; |
| 4648 | char *pos = buffer; |
| 4649 | struct DeviceCtlBlk *dcb; |
| 4650 | unsigned long flags; |
| 4651 | int dev; |
| 4652 | |
| 4653 | if (inout) /* Has data been written to the file ? */ |
| 4654 | return -EPERM; |
| 4655 | |
| 4656 | SPRINTF(DC395X_BANNER " PCI SCSI Host Adapter\n"); |
| 4657 | SPRINTF(" Driver Version " DC395X_VERSION "\n"); |
| 4658 | |
| 4659 | DC395x_LOCK_IO(acb->scsi_host, flags); |
| 4660 | |
| 4661 | SPRINTF("SCSI Host Nr %i, ", host->host_no); |
| 4662 | SPRINTF("DC395U/UW/F DC315/U %s\n", |
| 4663 | (acb->config & HCC_WIDE_CARD) ? "Wide" : ""); |
| 4664 | SPRINTF("io_port_base 0x%04lx, ", acb->io_port_base); |
| 4665 | SPRINTF("irq_level 0x%04x, ", acb->irq_level); |
| 4666 | SPRINTF(" SelTimeout %ims\n", (1638 * acb->sel_timeout) / 1000); |
| 4667 | |
| 4668 | SPRINTF("MaxID %i, MaxLUN %i, ", host->max_id, host->max_lun); |
| 4669 | SPRINTF("AdapterID %i\n", host->this_id); |
| 4670 | |
| 4671 | SPRINTF("tag_max_num %i", acb->tag_max_num); |
| 4672 | /*SPRINTF(", DMA_Status %i\n", DC395x_read8(acb, TRM_S1040_DMA_STATUS)); */ |
| 4673 | SPRINTF(", FilterCfg 0x%02x", |
| 4674 | DC395x_read8(acb, TRM_S1040_SCSI_CONFIG1)); |
| 4675 | SPRINTF(", DelayReset %is\n", acb->eeprom.delay_time); |
| 4676 | /*SPRINTF("\n"); */ |
| 4677 | |
| 4678 | SPRINTF("Nr of DCBs: %i\n", list_size(&acb->dcb_list)); |
| 4679 | SPRINTF |
| 4680 | ("Map of attached LUNs: %02x %02x %02x %02x %02x %02x %02x %02x\n", |
| 4681 | acb->dcb_map[0], acb->dcb_map[1], acb->dcb_map[2], |
| 4682 | acb->dcb_map[3], acb->dcb_map[4], acb->dcb_map[5], |
| 4683 | acb->dcb_map[6], acb->dcb_map[7]); |
| 4684 | SPRINTF |
| 4685 | (" %02x %02x %02x %02x %02x %02x %02x %02x\n", |
| 4686 | acb->dcb_map[8], acb->dcb_map[9], acb->dcb_map[10], |
| 4687 | acb->dcb_map[11], acb->dcb_map[12], acb->dcb_map[13], |
| 4688 | acb->dcb_map[14], acb->dcb_map[15]); |
| 4689 | |
| 4690 | SPRINTF |
| 4691 | ("Un ID LUN Prty Sync Wide DsCn SndS TagQ nego_period SyncFreq SyncOffs MaxCmd\n"); |
| 4692 | |
| 4693 | dev = 0; |
| 4694 | list_for_each_entry(dcb, &acb->dcb_list, list) { |
| 4695 | int nego_period; |
| 4696 | SPRINTF("%02i %02i %02i ", dev, dcb->target_id, |
| 4697 | dcb->target_lun); |
| 4698 | YESNO(dcb->dev_mode & NTC_DO_PARITY_CHK); |
| 4699 | YESNO(dcb->sync_offset); |
| 4700 | YESNO(dcb->sync_period & WIDE_SYNC); |
| 4701 | YESNO(dcb->dev_mode & NTC_DO_DISCONNECT); |
| 4702 | YESNO(dcb->dev_mode & NTC_DO_SEND_START); |
| 4703 | YESNO(dcb->sync_mode & EN_TAG_QUEUEING); |
| 4704 | nego_period = clock_period[dcb->sync_period & 0x07] << 2; |
| 4705 | if (dcb->sync_offset) |
| 4706 | SPRINTF(" %03i ns ", nego_period); |
| 4707 | else |
| 4708 | SPRINTF(" (%03i ns)", (dcb->min_nego_period << 2)); |
| 4709 | |
| 4710 | if (dcb->sync_offset & 0x0f) { |
| 4711 | spd = 1000 / (nego_period); |
| 4712 | spd1 = 1000 % (nego_period); |
| 4713 | spd1 = (spd1 * 10 + nego_period / 2) / (nego_period); |
| 4714 | SPRINTF(" %2i.%1i M %02i ", spd, spd1, |
| 4715 | (dcb->sync_offset & 0x0f)); |
| 4716 | } else |
| 4717 | SPRINTF(" "); |
| 4718 | |
| 4719 | /* Add more info ... */ |
| 4720 | SPRINTF(" %02i\n", dcb->max_command); |
| 4721 | dev++; |
| 4722 | } |
| 4723 | |
| 4724 | if (timer_pending(&acb->waiting_timer)) |
| 4725 | SPRINTF("Waiting queue timer running\n"); |
| 4726 | else |
| 4727 | SPRINTF("\n"); |
| 4728 | |
| 4729 | list_for_each_entry(dcb, &acb->dcb_list, list) { |
| 4730 | struct ScsiReqBlk *srb; |
| 4731 | if (!list_empty(&dcb->srb_waiting_list)) |
| 4732 | SPRINTF("DCB (%02i-%i): Waiting: %i:", |
| 4733 | dcb->target_id, dcb->target_lun, |
| 4734 | list_size(&dcb->srb_waiting_list)); |
| 4735 | list_for_each_entry(srb, &dcb->srb_waiting_list, list) |
| 4736 | SPRINTF(" %li", srb->cmd->pid); |
| 4737 | if (!list_empty(&dcb->srb_going_list)) |
| 4738 | SPRINTF("\nDCB (%02i-%i): Going : %i:", |
| 4739 | dcb->target_id, dcb->target_lun, |
| 4740 | list_size(&dcb->srb_going_list)); |
| 4741 | list_for_each_entry(srb, &dcb->srb_going_list, list) |
| 4742 | SPRINTF(" %li", srb->cmd->pid); |
| 4743 | if (!list_empty(&dcb->srb_waiting_list) || !list_empty(&dcb->srb_going_list)) |
| 4744 | SPRINTF("\n"); |
| 4745 | } |
| 4746 | |
| 4747 | if (debug_enabled(DBG_1)) { |
| 4748 | SPRINTF("DCB list for ACB %p:\n", acb); |
| 4749 | list_for_each_entry(dcb, &acb->dcb_list, list) { |
| 4750 | SPRINTF("%p -> ", dcb); |
| 4751 | } |
| 4752 | SPRINTF("END\n"); |
| 4753 | } |
| 4754 | |
| 4755 | *start = buffer + offset; |
| 4756 | DC395x_UNLOCK_IO(acb->scsi_host, flags); |
| 4757 | |
| 4758 | if (pos - buffer < offset) |
| 4759 | return 0; |
| 4760 | else if (pos - buffer - offset < length) |
| 4761 | return pos - buffer - offset; |
| 4762 | else |
| 4763 | return length; |
| 4764 | } |
| 4765 | |
| 4766 | |
| 4767 | static struct scsi_host_template dc395x_driver_template = { |
| 4768 | .module = THIS_MODULE, |
| 4769 | .proc_name = DC395X_NAME, |
| 4770 | .proc_info = dc395x_proc_info, |
| 4771 | .name = DC395X_BANNER " " DC395X_VERSION, |
| 4772 | .queuecommand = dc395x_queue_command, |
| 4773 | .bios_param = dc395x_bios_param, |
| 4774 | .slave_alloc = dc395x_slave_alloc, |
| 4775 | .slave_destroy = dc395x_slave_destroy, |
| 4776 | .can_queue = DC395x_MAX_CAN_QUEUE, |
| 4777 | .this_id = 7, |
| 4778 | .sg_tablesize = DC395x_MAX_SG_TABLESIZE, |
| 4779 | .cmd_per_lun = DC395x_MAX_CMD_PER_LUN, |
| 4780 | .eh_abort_handler = dc395x_eh_abort, |
| 4781 | .eh_bus_reset_handler = dc395x_eh_bus_reset, |
| 4782 | .unchecked_isa_dma = 0, |
| 4783 | .use_clustering = DISABLE_CLUSTERING, |
| 4784 | }; |
| 4785 | |
| 4786 | |
| 4787 | /** |
| 4788 | * banner_display - Display banner on first instance of driver |
| 4789 | * initialized. |
| 4790 | **/ |
| 4791 | static void banner_display(void) |
| 4792 | { |
| 4793 | static int banner_done = 0; |
| 4794 | if (!banner_done) |
| 4795 | { |
| 4796 | dprintkl(KERN_INFO, "%s %s\n", DC395X_BANNER, DC395X_VERSION); |
| 4797 | banner_done = 1; |
| 4798 | } |
| 4799 | } |
| 4800 | |
| 4801 | |
| 4802 | /** |
| 4803 | * dc395x_init_one - Initialise a single instance of the adapter. |
| 4804 | * |
| 4805 | * The PCI layer will call this once for each instance of the adapter |
| 4806 | * that it finds in the system. The pci_dev strcuture indicates which |
| 4807 | * instance we are being called from. |
| 4808 | * |
| 4809 | * @dev: The PCI device to intialize. |
| 4810 | * @id: Looks like a pointer to the entry in our pci device table |
| 4811 | * that was actually matched by the PCI subsystem. |
| 4812 | * |
| 4813 | * Returns 0 on success, or an error code (-ve) on failure. |
| 4814 | **/ |
| 4815 | static int __devinit dc395x_init_one(struct pci_dev *dev, |
| 4816 | const struct pci_device_id *id) |
| 4817 | { |
| 4818 | struct Scsi_Host *scsi_host = NULL; |
| 4819 | struct AdapterCtlBlk *acb = NULL; |
| 4820 | unsigned long io_port_base; |
| 4821 | unsigned int io_port_len; |
| 4822 | unsigned int irq; |
| 4823 | |
| 4824 | dprintkdbg(DBG_0, "Init one instance (%s)\n", pci_name(dev)); |
| 4825 | banner_display(); |
| 4826 | |
| 4827 | if (pci_enable_device(dev)) |
| 4828 | { |
| 4829 | dprintkl(KERN_INFO, "PCI Enable device failed.\n"); |
| 4830 | return -ENODEV; |
| 4831 | } |
| 4832 | io_port_base = pci_resource_start(dev, 0) & PCI_BASE_ADDRESS_IO_MASK; |
| 4833 | io_port_len = pci_resource_len(dev, 0); |
| 4834 | irq = dev->irq; |
| 4835 | dprintkdbg(DBG_0, "IO_PORT=0x%04lx, IRQ=0x%x\n", io_port_base, dev->irq); |
| 4836 | |
| 4837 | /* allocate scsi host information (includes out adapter) */ |
| 4838 | scsi_host = scsi_host_alloc(&dc395x_driver_template, |
| 4839 | sizeof(struct AdapterCtlBlk)); |
| 4840 | if (!scsi_host) { |
| 4841 | dprintkl(KERN_INFO, "scsi_host_alloc failed\n"); |
| 4842 | goto fail; |
| 4843 | } |
| 4844 | acb = (struct AdapterCtlBlk*)scsi_host->hostdata; |
| 4845 | acb->scsi_host = scsi_host; |
| 4846 | acb->dev = dev; |
| 4847 | |
| 4848 | /* initialise the adapter and everything we need */ |
| 4849 | if (adapter_init(acb, io_port_base, io_port_len, irq)) { |
| 4850 | dprintkl(KERN_INFO, "adapter init failed\n"); |
| 4851 | goto fail; |
| 4852 | } |
| 4853 | |
| 4854 | pci_set_master(dev); |
| 4855 | |
| 4856 | /* get the scsi mid level to scan for new devices on the bus */ |
| 4857 | if (scsi_add_host(scsi_host, &dev->dev)) { |
| 4858 | dprintkl(KERN_ERR, "scsi_add_host failed\n"); |
| 4859 | goto fail; |
| 4860 | } |
| 4861 | pci_set_drvdata(dev, scsi_host); |
| 4862 | scsi_scan_host(scsi_host); |
| 4863 | |
| 4864 | return 0; |
| 4865 | |
| 4866 | fail: |
| 4867 | if (acb != NULL) |
| 4868 | adapter_uninit(acb); |
| 4869 | if (scsi_host != NULL) |
| 4870 | scsi_host_put(scsi_host); |
| 4871 | pci_disable_device(dev); |
| 4872 | return -ENODEV; |
| 4873 | } |
| 4874 | |
| 4875 | |
| 4876 | /** |
| 4877 | * dc395x_remove_one - Called to remove a single instance of the |
| 4878 | * adapter. |
| 4879 | * |
| 4880 | * @dev: The PCI device to intialize. |
| 4881 | **/ |
| 4882 | static void __devexit dc395x_remove_one(struct pci_dev *dev) |
| 4883 | { |
| 4884 | struct Scsi_Host *scsi_host = pci_get_drvdata(dev); |
| 4885 | struct AdapterCtlBlk *acb = (struct AdapterCtlBlk *)(scsi_host->hostdata); |
| 4886 | |
| 4887 | dprintkdbg(DBG_0, "dc395x_remove_one: acb=%p\n", acb); |
| 4888 | |
| 4889 | scsi_remove_host(scsi_host); |
| 4890 | adapter_uninit(acb); |
| 4891 | pci_disable_device(dev); |
| 4892 | scsi_host_put(scsi_host); |
| 4893 | pci_set_drvdata(dev, NULL); |
| 4894 | } |
| 4895 | |
| 4896 | |
| 4897 | static struct pci_device_id dc395x_pci_table[] = { |
| 4898 | { |
| 4899 | .vendor = PCI_VENDOR_ID_TEKRAM, |
| 4900 | .device = PCI_DEVICE_ID_TEKRAM_TRMS1040, |
| 4901 | .subvendor = PCI_ANY_ID, |
| 4902 | .subdevice = PCI_ANY_ID, |
| 4903 | }, |
| 4904 | {} /* Terminating entry */ |
| 4905 | }; |
| 4906 | MODULE_DEVICE_TABLE(pci, dc395x_pci_table); |
| 4907 | |
| 4908 | |
| 4909 | static struct pci_driver dc395x_driver = { |
| 4910 | .name = DC395X_NAME, |
| 4911 | .id_table = dc395x_pci_table, |
| 4912 | .probe = dc395x_init_one, |
| 4913 | .remove = __devexit_p(dc395x_remove_one), |
| 4914 | }; |
| 4915 | |
| 4916 | |
| 4917 | /** |
| 4918 | * dc395x_module_init - Module initialization function |
| 4919 | * |
| 4920 | * Used by both module and built-in driver to initialise this driver. |
| 4921 | **/ |
| 4922 | static int __init dc395x_module_init(void) |
| 4923 | { |
| 4924 | return pci_module_init(&dc395x_driver); |
| 4925 | } |
| 4926 | |
| 4927 | |
| 4928 | /** |
| 4929 | * dc395x_module_exit - Module cleanup function. |
| 4930 | **/ |
| 4931 | static void __exit dc395x_module_exit(void) |
| 4932 | { |
| 4933 | pci_unregister_driver(&dc395x_driver); |
| 4934 | } |
| 4935 | |
| 4936 | |
| 4937 | module_init(dc395x_module_init); |
| 4938 | module_exit(dc395x_module_exit); |
| 4939 | |
| 4940 | MODULE_AUTHOR("C.L. Huang / Erich Chen / Kurt Garloff"); |
| 4941 | MODULE_DESCRIPTION("SCSI host adapter driver for Tekram TRM-S1040 based adapters: Tekram DC395 and DC315 series"); |
| 4942 | MODULE_LICENSE("GPL"); |