Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Adaptec AIC7xxx device driver for Linux. |
| 3 | * |
| 4 | * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.c#235 $ |
| 5 | * |
| 6 | * Copyright (c) 1994 John Aycock |
| 7 | * The University of Calgary Department of Computer Science. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2, or (at your option) |
| 12 | * any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; see the file COPYING. If not, write to |
| 21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 22 | * |
| 23 | * Sources include the Adaptec 1740 driver (aha1740.c), the Ultrastor 24F |
| 24 | * driver (ultrastor.c), various Linux kernel source, the Adaptec EISA |
| 25 | * config file (!adp7771.cfg), the Adaptec AHA-2740A Series User's Guide, |
| 26 | * the Linux Kernel Hacker's Guide, Writing a SCSI Device Driver for Linux, |
| 27 | * the Adaptec 1542 driver (aha1542.c), the Adaptec EISA overlay file |
| 28 | * (adp7770.ovl), the Adaptec AHA-2740 Series Technical Reference Manual, |
| 29 | * the Adaptec AIC-7770 Data Book, the ANSI SCSI specification, the |
| 30 | * ANSI SCSI-2 specification (draft 10c), ... |
| 31 | * |
| 32 | * -------------------------------------------------------------------------- |
| 33 | * |
| 34 | * Modifications by Daniel M. Eischen (deischen@iworks.InterWorks.org): |
| 35 | * |
| 36 | * Substantially modified to include support for wide and twin bus |
| 37 | * adapters, DMAing of SCBs, tagged queueing, IRQ sharing, bug fixes, |
| 38 | * SCB paging, and other rework of the code. |
| 39 | * |
| 40 | * -------------------------------------------------------------------------- |
| 41 | * Copyright (c) 1994-2000 Justin T. Gibbs. |
| 42 | * Copyright (c) 2000-2001 Adaptec Inc. |
| 43 | * All rights reserved. |
| 44 | * |
| 45 | * Redistribution and use in source and binary forms, with or without |
| 46 | * modification, are permitted provided that the following conditions |
| 47 | * are met: |
| 48 | * 1. Redistributions of source code must retain the above copyright |
| 49 | * notice, this list of conditions, and the following disclaimer, |
| 50 | * without modification. |
| 51 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 52 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 53 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 54 | * including a substantially similar Disclaimer requirement for further |
| 55 | * binary redistribution. |
| 56 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 57 | * of any contributors may be used to endorse or promote products derived |
| 58 | * from this software without specific prior written permission. |
| 59 | * |
| 60 | * Alternatively, this software may be distributed under the terms of the |
| 61 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 62 | * Software Foundation. |
| 63 | * |
| 64 | * NO WARRANTY |
| 65 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 66 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 67 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 68 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 69 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 70 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 71 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 72 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 73 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 74 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 75 | * POSSIBILITY OF SUCH DAMAGES. |
| 76 | * |
| 77 | *--------------------------------------------------------------------------- |
| 78 | * |
| 79 | * Thanks also go to (in alphabetical order) the following: |
| 80 | * |
| 81 | * Rory Bolt - Sequencer bug fixes |
| 82 | * Jay Estabrook - Initial DEC Alpha support |
| 83 | * Doug Ledford - Much needed abort/reset bug fixes |
| 84 | * Kai Makisara - DMAing of SCBs |
| 85 | * |
| 86 | * A Boot time option was also added for not resetting the scsi bus. |
| 87 | * |
| 88 | * Form: aic7xxx=extended |
| 89 | * aic7xxx=no_reset |
| 90 | * aic7xxx=verbose |
| 91 | * |
| 92 | * Daniel M. Eischen, deischen@iworks.InterWorks.org, 1/23/97 |
| 93 | * |
| 94 | * Id: aic7xxx.c,v 4.1 1997/06/12 08:23:42 deang Exp |
| 95 | */ |
| 96 | |
| 97 | /* |
| 98 | * Further driver modifications made by Doug Ledford <dledford@redhat.com> |
| 99 | * |
| 100 | * Copyright (c) 1997-1999 Doug Ledford |
| 101 | * |
| 102 | * These changes are released under the same licensing terms as the FreeBSD |
| 103 | * driver written by Justin Gibbs. Please see his Copyright notice above |
| 104 | * for the exact terms and conditions covering my changes as well as the |
| 105 | * warranty statement. |
| 106 | * |
| 107 | * Modifications made to the aic7xxx.c,v 4.1 driver from Dan Eischen include |
| 108 | * but are not limited to: |
| 109 | * |
| 110 | * 1: Import of the latest FreeBSD sequencer code for this driver |
| 111 | * 2: Modification of kernel code to accommodate different sequencer semantics |
| 112 | * 3: Extensive changes throughout kernel portion of driver to improve |
| 113 | * abort/reset processing and error hanndling |
| 114 | * 4: Other work contributed by various people on the Internet |
| 115 | * 5: Changes to printk information and verbosity selection code |
| 116 | * 6: General reliability related changes, especially in IRQ management |
| 117 | * 7: Modifications to the default probe/attach order for supported cards |
| 118 | * 8: SMP friendliness has been improved |
| 119 | * |
| 120 | */ |
| 121 | |
| 122 | #include "aic7xxx_osm.h" |
| 123 | #include "aic7xxx_inline.h" |
| 124 | #include <scsi/scsicam.h> |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 125 | |
| 126 | static struct scsi_transport_template *ahc_linux_transport_template = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | #include <linux/init.h> /* __setup */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | #include <linux/mm.h> /* For fetching system memory size */ |
| 130 | #include <linux/blkdev.h> /* For block_size() */ |
| 131 | #include <linux/delay.h> /* For ssleep/msleep */ |
| 132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | /* |
| 135 | * Set this to the delay in seconds after SCSI bus reset. |
| 136 | * Note, we honor this only for the initial bus reset. |
| 137 | * The scsi error recovery code performs its own bus settle |
| 138 | * delay handling for error recovery actions. |
| 139 | */ |
| 140 | #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS |
| 141 | #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS |
| 142 | #else |
| 143 | #define AIC7XXX_RESET_DELAY 5000 |
| 144 | #endif |
| 145 | |
| 146 | /* |
| 147 | * Control collection of SCSI transfer statistics for the /proc filesystem. |
| 148 | * |
| 149 | * NOTE: Do NOT enable this when running on kernels version 1.2.x and below. |
| 150 | * NOTE: This does affect performance since it has to maintain statistics. |
| 151 | */ |
| 152 | #ifdef CONFIG_AIC7XXX_PROC_STATS |
| 153 | #define AIC7XXX_PROC_STATS |
| 154 | #endif |
| 155 | |
| 156 | /* |
| 157 | * To change the default number of tagged transactions allowed per-device, |
| 158 | * add a line to the lilo.conf file like: |
| 159 | * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" |
| 160 | * which will result in the first four devices on the first two |
| 161 | * controllers being set to a tagged queue depth of 32. |
| 162 | * |
| 163 | * The tag_commands is an array of 16 to allow for wide and twin adapters. |
| 164 | * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 |
| 165 | * for channel 1. |
| 166 | */ |
| 167 | typedef struct { |
| 168 | uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ |
| 169 | } adapter_tag_info_t; |
| 170 | |
| 171 | /* |
| 172 | * Modify this as you see fit for your system. |
| 173 | * |
| 174 | * 0 tagged queuing disabled |
| 175 | * 1 <= n <= 253 n == max tags ever dispatched. |
| 176 | * |
| 177 | * The driver will throttle the number of commands dispatched to a |
| 178 | * device if it returns queue full. For devices with a fixed maximum |
| 179 | * queue depth, the driver will eventually determine this depth and |
| 180 | * lock it in (a console message is printed to indicate that a lock |
| 181 | * has occurred). On some devices, queue full is returned for a temporary |
| 182 | * resource shortage. These devices will return queue full at varying |
| 183 | * depths. The driver will throttle back when the queue fulls occur and |
| 184 | * attempt to slowly increase the depth over time as the device recovers |
| 185 | * from the resource shortage. |
| 186 | * |
| 187 | * In this example, the first line will disable tagged queueing for all |
| 188 | * the devices on the first probed aic7xxx adapter. |
| 189 | * |
| 190 | * The second line enables tagged queueing with 4 commands/LUN for IDs |
| 191 | * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the |
| 192 | * driver to attempt to use up to 64 tags for ID 1. |
| 193 | * |
| 194 | * The third line is the same as the first line. |
| 195 | * |
| 196 | * The fourth line disables tagged queueing for devices 0 and 3. It |
| 197 | * enables tagged queueing for the other IDs, with 16 commands/LUN |
| 198 | * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for |
| 199 | * IDs 2, 5-7, and 9-15. |
| 200 | */ |
| 201 | |
| 202 | /* |
| 203 | * NOTE: The below structure is for reference only, the actual structure |
| 204 | * to modify in order to change things is just below this comment block. |
| 205 | adapter_tag_info_t aic7xxx_tag_info[] = |
| 206 | { |
| 207 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, |
| 208 | {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, |
| 209 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, |
| 210 | {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} |
| 211 | }; |
| 212 | */ |
| 213 | |
| 214 | #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE |
| 215 | #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE |
| 216 | #else |
| 217 | #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE |
| 218 | #endif |
| 219 | |
| 220 | #define AIC7XXX_CONFIGED_TAG_COMMANDS { \ |
| 221 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ |
| 222 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ |
| 223 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ |
| 224 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ |
| 225 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ |
| 226 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ |
| 227 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ |
| 228 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \ |
| 229 | } |
| 230 | |
| 231 | /* |
| 232 | * By default, use the number of commands specified by |
| 233 | * the users kernel configuration. |
| 234 | */ |
| 235 | static adapter_tag_info_t aic7xxx_tag_info[] = |
| 236 | { |
| 237 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 238 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 239 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 240 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 241 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 242 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 243 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 244 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 245 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 246 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 247 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 248 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 249 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 250 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 251 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 252 | {AIC7XXX_CONFIGED_TAG_COMMANDS} |
| 253 | }; |
| 254 | |
| 255 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | * There should be a specific return value for this in scsi.h, but |
| 257 | * it seems that most drivers ignore it. |
| 258 | */ |
| 259 | #define DID_UNDERFLOW DID_ERROR |
| 260 | |
| 261 | void |
| 262 | ahc_print_path(struct ahc_softc *ahc, struct scb *scb) |
| 263 | { |
| 264 | printk("(scsi%d:%c:%d:%d): ", |
| 265 | ahc->platform_data->host->host_no, |
| 266 | scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', |
| 267 | scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, |
| 268 | scb != NULL ? SCB_GET_LUN(scb) : -1); |
| 269 | } |
| 270 | |
| 271 | /* |
| 272 | * XXX - these options apply unilaterally to _all_ 274x/284x/294x |
| 273 | * cards in the system. This should be fixed. Exceptions to this |
| 274 | * rule are noted in the comments. |
| 275 | */ |
| 276 | |
| 277 | /* |
| 278 | * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This |
| 279 | * has no effect on any later resets that might occur due to things like |
| 280 | * SCSI bus timeouts. |
| 281 | */ |
| 282 | static uint32_t aic7xxx_no_reset; |
| 283 | |
| 284 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | * Should we force EXTENDED translation on a controller. |
| 286 | * 0 == Use whatever is in the SEEPROM or default to off |
| 287 | * 1 == Use whatever is in the SEEPROM or default to on |
| 288 | */ |
| 289 | static uint32_t aic7xxx_extended; |
| 290 | |
| 291 | /* |
| 292 | * PCI bus parity checking of the Adaptec controllers. This is somewhat |
| 293 | * dubious at best. To my knowledge, this option has never actually |
| 294 | * solved a PCI parity problem, but on certain machines with broken PCI |
| 295 | * chipset configurations where stray PCI transactions with bad parity are |
| 296 | * the norm rather than the exception, the error messages can be overwelming. |
| 297 | * It's included in the driver for completeness. |
| 298 | * 0 = Shut off PCI parity check |
| 299 | * non-0 = reverse polarity pci parity checking |
| 300 | */ |
| 301 | static uint32_t aic7xxx_pci_parity = ~0; |
| 302 | |
| 303 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | * There are lots of broken chipsets in the world. Some of them will |
| 305 | * violate the PCI spec when we issue byte sized memory writes to our |
| 306 | * controller. I/O mapped register access, if allowed by the given |
| 307 | * platform, will work in almost all cases. |
| 308 | */ |
| 309 | uint32_t aic7xxx_allow_memio = ~0; |
| 310 | |
| 311 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | * So that we can set how long each device is given as a selection timeout. |
| 313 | * The table of values goes like this: |
| 314 | * 0 - 256ms |
| 315 | * 1 - 128ms |
| 316 | * 2 - 64ms |
| 317 | * 3 - 32ms |
| 318 | * We default to 256ms because some older devices need a longer time |
| 319 | * to respond to initial selection. |
| 320 | */ |
| 321 | static uint32_t aic7xxx_seltime; |
| 322 | |
| 323 | /* |
| 324 | * Certain devices do not perform any aging on commands. Should the |
| 325 | * device be saturated by commands in one portion of the disk, it is |
| 326 | * possible for transactions on far away sectors to never be serviced. |
| 327 | * To handle these devices, we can periodically send an ordered tag to |
| 328 | * force all outstanding transactions to be serviced prior to a new |
| 329 | * transaction. |
| 330 | */ |
| 331 | uint32_t aic7xxx_periodic_otag; |
| 332 | |
| 333 | /* |
| 334 | * Module information and settable options. |
| 335 | */ |
| 336 | static char *aic7xxx = NULL; |
| 337 | |
| 338 | MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>"); |
| 339 | MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver"); |
| 340 | MODULE_LICENSE("Dual BSD/GPL"); |
| 341 | MODULE_VERSION(AIC7XXX_DRIVER_VERSION); |
| 342 | module_param(aic7xxx, charp, 0444); |
| 343 | MODULE_PARM_DESC(aic7xxx, |
| 344 | "period delimited, options string.\n" |
| 345 | " verbose Enable verbose/diagnostic logging\n" |
| 346 | " allow_memio Allow device registers to be memory mapped\n" |
| 347 | " debug Bitmask of debug values to enable\n" |
| 348 | " no_probe Toggle EISA/VLB controller probing\n" |
| 349 | " probe_eisa_vl Toggle EISA/VLB controller probing\n" |
| 350 | " no_reset Supress initial bus resets\n" |
| 351 | " extended Enable extended geometry on all controllers\n" |
| 352 | " periodic_otag Send an ordered tagged transaction\n" |
| 353 | " periodically to prevent tag starvation.\n" |
| 354 | " This may be required by some older disk\n" |
| 355 | " drives or RAID arrays.\n" |
| 356 | " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n" |
| 357 | " tag_info:<tag_str> Set per-target tag depth\n" |
| 358 | " global_tag_depth:<int> Global tag depth for every target\n" |
| 359 | " on every bus\n" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | " seltime:<int> Selection Timeout\n" |
| 361 | " (0/256ms,1/128ms,2/64ms,3/32ms)\n" |
| 362 | "\n" |
| 363 | " Sample /etc/modprobe.conf line:\n" |
| 364 | " Toggle EISA/VLB probing\n" |
| 365 | " Set tag depth on Controller 1/Target 1 to 10 tags\n" |
| 366 | " Shorten the selection timeout to 128ms\n" |
| 367 | "\n" |
| 368 | " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" |
| 369 | ); |
| 370 | |
| 371 | static void ahc_linux_handle_scsi_status(struct ahc_softc *, |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 372 | struct scsi_device *, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | struct scb *); |
| 374 | static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, |
Christoph Hellwig | 013791e | 2005-05-16 18:52:39 +0200 | [diff] [blame] | 375 | struct scsi_cmnd *cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | static void ahc_linux_sem_timeout(u_long arg); |
| 377 | static void ahc_linux_freeze_simq(struct ahc_softc *ahc); |
| 378 | static void ahc_linux_release_simq(u_long arg); |
Christoph Hellwig | 013791e | 2005-05-16 18:52:39 +0200 | [diff] [blame] | 379 | static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, |
| 382 | struct ahc_devinfo *devinfo); |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 383 | static void ahc_linux_device_queue_depth(struct scsi_device *); |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame] | 384 | static int ahc_linux_run_command(struct ahc_softc*, |
| 385 | struct ahc_linux_device *, |
| 386 | struct scsi_cmnd *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | static void ahc_linux_setup_tag_info_global(char *p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | static int aic7xxx_setup(char *s); |
Christoph Hellwig | 2a40342 | 2005-06-28 16:50:40 +0200 | [diff] [blame] | 389 | |
| 390 | static int ahc_linux_unit; |
| 391 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | |
| 393 | /********************************* Inlines ************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); |
| 395 | |
| 396 | static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, |
| 397 | struct ahc_dma_seg *sg, |
| 398 | dma_addr_t addr, bus_size_t len); |
| 399 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | static __inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) |
| 402 | { |
Christoph Hellwig | 013791e | 2005-05-16 18:52:39 +0200 | [diff] [blame] | 403 | struct scsi_cmnd *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | |
| 405 | cmd = scb->io_ctx; |
| 406 | ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); |
| 407 | if (cmd->use_sg != 0) { |
| 408 | struct scatterlist *sg; |
| 409 | |
| 410 | sg = (struct scatterlist *)cmd->request_buffer; |
| 411 | pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg, |
| be7db05 | 2005-04-17 15:26:13 -0500 | [diff] [blame] | 412 | cmd->sc_data_direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | } else if (cmd->request_bufflen != 0) { |
| 414 | pci_unmap_single(ahc->dev_softc, |
| 415 | scb->platform_data->buf_busaddr, |
| 416 | cmd->request_bufflen, |
| be7db05 | 2005-04-17 15:26:13 -0500 | [diff] [blame] | 417 | cmd->sc_data_direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | } |
| 419 | } |
| 420 | |
| 421 | static __inline int |
| 422 | ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, |
| 423 | struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) |
| 424 | { |
| 425 | int consumed; |
| 426 | |
| 427 | if ((scb->sg_count + 1) > AHC_NSEG) |
| 428 | panic("Too few segs for dma mapping. " |
| 429 | "Increase AHC_NSEG\n"); |
| 430 | |
| 431 | consumed = 1; |
| 432 | sg->addr = ahc_htole32(addr & 0xFFFFFFFF); |
| 433 | scb->platform_data->xfer_len += len; |
| 434 | |
| 435 | if (sizeof(dma_addr_t) > 4 |
| 436 | && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) |
| 437 | len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; |
| 438 | |
| 439 | sg->len = ahc_htole32(len); |
| 440 | return (consumed); |
| 441 | } |
| 442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | * Return a string describing the driver. |
| 445 | */ |
| 446 | static const char * |
| 447 | ahc_linux_info(struct Scsi_Host *host) |
| 448 | { |
| 449 | static char buffer[512]; |
| 450 | char ahc_info[256]; |
| 451 | char *bp; |
| 452 | struct ahc_softc *ahc; |
| 453 | |
| 454 | bp = &buffer[0]; |
| 455 | ahc = *(struct ahc_softc **)host->hostdata; |
| 456 | memset(bp, 0, sizeof(buffer)); |
| 457 | strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev "); |
| 458 | strcat(bp, AIC7XXX_DRIVER_VERSION); |
| 459 | strcat(bp, "\n"); |
| 460 | strcat(bp, " <"); |
| 461 | strcat(bp, ahc->description); |
| 462 | strcat(bp, ">\n"); |
| 463 | strcat(bp, " "); |
| 464 | ahc_controller_info(ahc, ahc_info); |
| 465 | strcat(bp, ahc_info); |
| 466 | strcat(bp, "\n"); |
| 467 | |
| 468 | return (bp); |
| 469 | } |
| 470 | |
| 471 | /* |
| 472 | * Queue an SCB to the controller. |
| 473 | */ |
| 474 | static int |
Christoph Hellwig | 013791e | 2005-05-16 18:52:39 +0200 | [diff] [blame] | 475 | ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | { |
| 477 | struct ahc_softc *ahc; |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 478 | struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | |
| 480 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; |
| 481 | |
| 482 | /* |
| 483 | * Save the callback on completion function. |
| 484 | */ |
| 485 | cmd->scsi_done = scsi_done; |
| 486 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | /* |
| 488 | * Close the race of a command that was in the process of |
| 489 | * being queued to us just as our simq was frozen. Let |
| 490 | * DV commands through so long as we are only frozen to |
| 491 | * perform DV. |
| 492 | */ |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame] | 493 | if (ahc->platform_data->qfrozen != 0) |
| 494 | return SCSI_MLQUEUE_HOST_BUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | cmd->result = CAM_REQ_INPROG << 16; |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame] | 497 | |
| 498 | return ahc_linux_run_command(ahc, dev, cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | } |
| 500 | |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 501 | static inline struct scsi_target ** |
| 502 | ahc_linux_target_in_softc(struct scsi_target *starget) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | { |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 504 | struct ahc_softc *ahc = |
| 505 | *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); |
James Bottomley | fb3089d | 2005-05-17 21:09:52 -0500 | [diff] [blame] | 506 | unsigned int target_offset; |
James Bottomley | c752523 | 2005-05-17 18:07:34 -0500 | [diff] [blame] | 507 | |
| 508 | target_offset = starget->id; |
| 509 | if (starget->channel != 0) |
| 510 | target_offset += 8; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 512 | return &ahc->platform_data->starget[target_offset]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | } |
| 514 | |
| 515 | static int |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 516 | ahc_linux_target_alloc(struct scsi_target *starget) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | { |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 518 | struct ahc_softc *ahc = |
| 519 | *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); |
| 520 | struct seeprom_config *sc = ahc->seep_config; |
| 521 | unsigned long flags; |
| 522 | struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); |
| 523 | struct ahc_linux_target *targ = scsi_transport_target_data(starget); |
| 524 | unsigned short scsirate; |
| 525 | struct ahc_devinfo devinfo; |
| 526 | struct ahc_initiator_tinfo *tinfo; |
| 527 | struct ahc_tmode_tstate *tstate; |
| 528 | char channel = starget->channel + 'A'; |
| 529 | unsigned int our_id = ahc->our_id; |
| 530 | unsigned int target_offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 532 | target_offset = starget->id; |
| 533 | if (starget->channel != 0) |
| 534 | target_offset += 8; |
| 535 | |
| 536 | if (starget->channel) |
| 537 | our_id = ahc->our_id_b; |
James Bottomley | c752523 | 2005-05-17 18:07:34 -0500 | [diff] [blame] | 538 | |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 539 | ahc_lock(ahc, &flags); |
James Bottomley | c752523 | 2005-05-17 18:07:34 -0500 | [diff] [blame] | 540 | |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 541 | BUG_ON(*ahc_targp != NULL); |
| cb62402 | 2005-04-17 18:03:20 -0500 | [diff] [blame] | 542 | |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 543 | *ahc_targp = starget; |
| 544 | memset(targ, 0, sizeof(*targ)); |
| 545 | |
| 546 | if (sc) { |
James Bottomley | 12021ff | 2005-06-13 20:58:56 -0500 | [diff] [blame] | 547 | int maxsync = AHC_SYNCRATE_DT; |
| 548 | int ultra = 0; |
| 549 | int flags = sc->device_flags[target_offset]; |
| 550 | |
| 551 | if (ahc->flags & AHC_NEWEEPROM_FMT) { |
| 552 | if (flags & CFSYNCHISULTRA) |
| 553 | ultra = 1; |
| 554 | } else if (flags & CFULTRAEN) |
| 555 | ultra = 1; |
| 556 | /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 |
| 557 | * change it to ultra=0, CFXFER = 0 */ |
| 558 | if(ultra && (flags & CFXFER) == 0x04) { |
| 559 | ultra = 0; |
| 560 | flags &= ~CFXFER; |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 561 | } |
James Bottomley | 12021ff | 2005-06-13 20:58:56 -0500 | [diff] [blame] | 562 | |
| 563 | if ((ahc->features & AHC_ULTRA2) != 0) { |
| 564 | scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); |
| 565 | } else { |
| 566 | scsirate = (flags & CFXFER) << 4; |
| 567 | maxsync = ultra ? AHC_SYNCRATE_ULTRA : |
| 568 | AHC_SYNCRATE_FAST; |
| 569 | } |
| 570 | spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; |
| 571 | if (!(flags & CFSYNCH)) |
| 572 | spi_max_offset(starget) = 0; |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 573 | spi_min_period(starget) = |
James Bottomley | 12021ff | 2005-06-13 20:58:56 -0500 | [diff] [blame] | 574 | ahc_find_period(ahc, scsirate, maxsync); |
| 575 | |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 576 | tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id, |
| 577 | starget->id, &tstate); |
| 578 | } |
| 579 | ahc_compile_devinfo(&devinfo, our_id, starget->id, |
| 580 | CAM_LUN_WILDCARD, channel, |
| 581 | ROLE_INITIATOR); |
| 582 | ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, |
| 583 | AHC_TRANS_GOAL, /*paused*/FALSE); |
| 584 | ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, |
| 585 | AHC_TRANS_GOAL, /*paused*/FALSE); |
| 586 | ahc_unlock(ahc, &flags); |
| cb62402 | 2005-04-17 18:03:20 -0500 | [diff] [blame] | 587 | |
James Bottomley | c752523 | 2005-05-17 18:07:34 -0500 | [diff] [blame] | 588 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | } |
| 590 | |
| 591 | static void |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 592 | ahc_linux_target_destroy(struct scsi_target *starget) |
| 593 | { |
| 594 | struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); |
| 595 | |
| 596 | *ahc_targp = NULL; |
| 597 | } |
| 598 | |
| 599 | static int |
| 600 | ahc_linux_slave_alloc(struct scsi_device *sdev) |
| 601 | { |
| 602 | struct ahc_softc *ahc = |
| 603 | *((struct ahc_softc **)sdev->host->hostdata); |
| 604 | struct scsi_target *starget = sdev->sdev_target; |
| 605 | struct ahc_linux_target *targ = scsi_transport_target_data(starget); |
| 606 | struct ahc_linux_device *dev; |
| 607 | |
| 608 | if (bootverbose) |
| 609 | printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); |
| 610 | |
| 611 | BUG_ON(targ->sdev[sdev->lun] != NULL); |
| 612 | |
| 613 | dev = scsi_transport_device_data(sdev); |
| 614 | memset(dev, 0, sizeof(*dev)); |
| 615 | |
| 616 | /* |
| 617 | * We start out life using untagged |
| 618 | * transactions of which we allow one. |
| 619 | */ |
| 620 | dev->openings = 1; |
| 621 | |
| 622 | /* |
| 623 | * Set maxtags to 0. This will be changed if we |
| 624 | * later determine that we are dealing with |
| 625 | * a tagged queuing capable device. |
| 626 | */ |
| 627 | dev->maxtags = 0; |
| 628 | |
| 629 | targ->sdev[sdev->lun] = sdev; |
| 630 | |
James Bottomley | 79778a2 | 2005-08-04 17:33:22 -0500 | [diff] [blame] | 631 | spi_period(starget) = 0; |
| 632 | |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 633 | return 0; |
| 634 | } |
| 635 | |
| 636 | static int |
| 637 | ahc_linux_slave_configure(struct scsi_device *sdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | { |
| 639 | struct ahc_softc *ahc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 641 | ahc = *((struct ahc_softc **)sdev->host->hostdata); |
| 642 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | if (bootverbose) |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 644 | printf("%s: Slave Configure %d\n", ahc_name(ahc), sdev->id); |
| 645 | |
| 646 | ahc_linux_device_queue_depth(sdev); |
| 647 | |
| 648 | /* Initial Domain Validation */ |
| 649 | if (!spi_initial_dv(sdev->sdev_target)) |
| 650 | spi_dv_device(sdev); |
| 651 | |
| 652 | return 0; |
| 653 | } |
| 654 | |
| 655 | static void |
| 656 | ahc_linux_slave_destroy(struct scsi_device *sdev) |
| 657 | { |
| 658 | struct ahc_softc *ahc; |
| 659 | struct ahc_linux_device *dev = scsi_transport_device_data(sdev); |
| 660 | struct ahc_linux_target *targ = scsi_transport_target_data(sdev->sdev_target); |
| 661 | |
| 662 | ahc = *((struct ahc_softc **)sdev->host->hostdata); |
| 663 | if (bootverbose) |
| 664 | printf("%s: Slave Destroy %d\n", ahc_name(ahc), sdev->id); |
James Bottomley | c752523 | 2005-05-17 18:07:34 -0500 | [diff] [blame] | 665 | |
| 666 | BUG_ON(dev->active); |
| 667 | |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 668 | targ->sdev[sdev->lun] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | |
| 671 | #if defined(__i386__) |
| 672 | /* |
| 673 | * Return the disk geometry for the given SCSI device. |
| 674 | */ |
| 675 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, |
| 677 | sector_t capacity, int geom[]) |
| 678 | { |
| 679 | uint8_t *bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | int heads; |
| 681 | int sectors; |
| 682 | int cylinders; |
| 683 | int ret; |
| 684 | int extended; |
| 685 | struct ahc_softc *ahc; |
| 686 | u_int channel; |
| 687 | |
| 688 | ahc = *((struct ahc_softc **)sdev->host->hostdata); |
| 689 | channel = sdev->channel; |
| 690 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 691 | bh = scsi_bios_ptable(bdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | if (bh) { |
| 693 | ret = scsi_partsize(bh, capacity, |
| 694 | &geom[2], &geom[0], &geom[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | kfree(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | if (ret != -1) |
| 697 | return (ret); |
| 698 | } |
| 699 | heads = 64; |
| 700 | sectors = 32; |
| 701 | cylinders = aic_sector_div(capacity, heads, sectors); |
| 702 | |
| 703 | if (aic7xxx_extended != 0) |
| 704 | extended = 1; |
| 705 | else if (channel == 0) |
| 706 | extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; |
| 707 | else |
| 708 | extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; |
| 709 | if (extended && cylinders >= 1024) { |
| 710 | heads = 255; |
| 711 | sectors = 63; |
| 712 | cylinders = aic_sector_div(capacity, heads, sectors); |
| 713 | } |
| 714 | geom[0] = heads; |
| 715 | geom[1] = sectors; |
| 716 | geom[2] = cylinders; |
| 717 | return (0); |
| 718 | } |
| 719 | #endif |
| 720 | |
| 721 | /* |
| 722 | * Abort the current SCSI command(s). |
| 723 | */ |
| 724 | static int |
Christoph Hellwig | 013791e | 2005-05-16 18:52:39 +0200 | [diff] [blame] | 725 | ahc_linux_abort(struct scsi_cmnd *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | { |
| 727 | int error; |
| 728 | |
| 729 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); |
| 730 | if (error != 0) |
| 731 | printf("aic7xxx_abort returns 0x%x\n", error); |
| 732 | return (error); |
| 733 | } |
| 734 | |
| 735 | /* |
| 736 | * Attempt to send a target reset message to the device that timed out. |
| 737 | */ |
| 738 | static int |
Christoph Hellwig | 013791e | 2005-05-16 18:52:39 +0200 | [diff] [blame] | 739 | ahc_linux_dev_reset(struct scsi_cmnd *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | { |
| 741 | int error; |
| 742 | |
| 743 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); |
| 744 | if (error != 0) |
| 745 | printf("aic7xxx_dev_reset returns 0x%x\n", error); |
| 746 | return (error); |
| 747 | } |
| 748 | |
| 749 | /* |
| 750 | * Reset the SCSI bus. |
| 751 | */ |
| 752 | static int |
Christoph Hellwig | 013791e | 2005-05-16 18:52:39 +0200 | [diff] [blame] | 753 | ahc_linux_bus_reset(struct scsi_cmnd *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | { |
| 755 | struct ahc_softc *ahc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | int found; |
Jeff Garzik | 68b3aa7 | 2005-05-28 07:56:31 -0400 | [diff] [blame] | 757 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | |
| 759 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; |
Jeff Garzik | 68b3aa7 | 2005-05-28 07:56:31 -0400 | [diff] [blame] | 760 | |
| 761 | ahc_lock(ahc, &flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | found = ahc_reset_channel(ahc, cmd->device->channel + 'A', |
| 763 | /*initiate reset*/TRUE); |
Jeff Garzik | 68b3aa7 | 2005-05-28 07:56:31 -0400 | [diff] [blame] | 764 | ahc_unlock(ahc, &flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | |
| 766 | if (bootverbose) |
| 767 | printf("%s: SCSI bus reset delivered. " |
| 768 | "%d SCBs aborted.\n", ahc_name(ahc), found); |
| 769 | |
| 770 | return SUCCESS; |
| 771 | } |
| 772 | |
Christoph Hellwig | 013791e | 2005-05-16 18:52:39 +0200 | [diff] [blame] | 773 | struct scsi_host_template aic7xxx_driver_template = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | .module = THIS_MODULE, |
| 775 | .name = "aic7xxx", |
Christoph Hellwig | dfd287f | 2005-06-28 16:49:44 +0200 | [diff] [blame] | 776 | .proc_name = "aic7xxx", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | .proc_info = ahc_linux_proc_info, |
| 778 | .info = ahc_linux_info, |
| 779 | .queuecommand = ahc_linux_queue, |
| 780 | .eh_abort_handler = ahc_linux_abort, |
| 781 | .eh_device_reset_handler = ahc_linux_dev_reset, |
| 782 | .eh_bus_reset_handler = ahc_linux_bus_reset, |
| 783 | #if defined(__i386__) |
| 784 | .bios_param = ahc_linux_biosparam, |
| 785 | #endif |
| 786 | .can_queue = AHC_MAX_QUEUE, |
| 787 | .this_id = -1, |
| 788 | .cmd_per_lun = 2, |
| 789 | .use_clustering = ENABLE_CLUSTERING, |
| 790 | .slave_alloc = ahc_linux_slave_alloc, |
| 791 | .slave_configure = ahc_linux_slave_configure, |
| 792 | .slave_destroy = ahc_linux_slave_destroy, |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 793 | .target_alloc = ahc_linux_target_alloc, |
| 794 | .target_destroy = ahc_linux_target_destroy, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | }; |
| 796 | |
| 797 | /**************************** Tasklet Handler *********************************/ |
| 798 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | /******************************** Macros **************************************/ |
| 800 | #define BUILD_SCSIID(ahc, cmd) \ |
| 801 | ((((cmd)->device->id << TID_SHIFT) & TID) \ |
| 802 | | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ |
| 803 | | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) |
| 804 | |
| 805 | /******************************** Bus DMA *************************************/ |
| 806 | int |
| 807 | ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, |
| 808 | bus_size_t alignment, bus_size_t boundary, |
| 809 | dma_addr_t lowaddr, dma_addr_t highaddr, |
| 810 | bus_dma_filter_t *filter, void *filterarg, |
| 811 | bus_size_t maxsize, int nsegments, |
| 812 | bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) |
| 813 | { |
| 814 | bus_dma_tag_t dmat; |
| 815 | |
| 816 | dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); |
| 817 | if (dmat == NULL) |
| 818 | return (ENOMEM); |
| 819 | |
| 820 | /* |
| 821 | * Linux is very simplistic about DMA memory. For now don't |
| 822 | * maintain all specification information. Once Linux supplies |
| 823 | * better facilities for doing these operations, or the |
| 824 | * needs of this particular driver change, we might need to do |
| 825 | * more here. |
| 826 | */ |
| 827 | dmat->alignment = alignment; |
| 828 | dmat->boundary = boundary; |
| 829 | dmat->maxsize = maxsize; |
| 830 | *ret_tag = dmat; |
| 831 | return (0); |
| 832 | } |
| 833 | |
| 834 | void |
| 835 | ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) |
| 836 | { |
| 837 | free(dmat, M_DEVBUF); |
| 838 | } |
| 839 | |
| 840 | int |
| 841 | ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, |
| 842 | int flags, bus_dmamap_t *mapp) |
| 843 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | *vaddr = pci_alloc_consistent(ahc->dev_softc, |
Christoph Hellwig | 7dfa0f2 | 2005-05-16 18:54:12 +0200 | [diff] [blame] | 845 | dmat->maxsize, mapp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | if (*vaddr == NULL) |
Christoph Hellwig | 7dfa0f2 | 2005-05-16 18:54:12 +0200 | [diff] [blame] | 847 | return ENOMEM; |
| 848 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | } |
| 850 | |
| 851 | void |
| 852 | ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, |
| 853 | void* vaddr, bus_dmamap_t map) |
| 854 | { |
| 855 | pci_free_consistent(ahc->dev_softc, dmat->maxsize, |
Christoph Hellwig | 7dfa0f2 | 2005-05-16 18:54:12 +0200 | [diff] [blame] | 856 | vaddr, map); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | } |
| 858 | |
| 859 | int |
| 860 | ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, |
| 861 | void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, |
| 862 | void *cb_arg, int flags) |
| 863 | { |
| 864 | /* |
| 865 | * Assume for now that this will only be used during |
| 866 | * initialization and not for per-transaction buffer mapping. |
| 867 | */ |
| 868 | bus_dma_segment_t stack_sg; |
| 869 | |
Christoph Hellwig | 7dfa0f2 | 2005-05-16 18:54:12 +0200 | [diff] [blame] | 870 | stack_sg.ds_addr = map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | stack_sg.ds_len = dmat->maxsize; |
| 872 | cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); |
| 873 | return (0); |
| 874 | } |
| 875 | |
| 876 | void |
| 877 | ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) |
| 878 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | } |
| 880 | |
| 881 | int |
| 882 | ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) |
| 883 | { |
| 884 | /* Nothing to do */ |
| 885 | return (0); |
| 886 | } |
| 887 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | static void |
| 889 | ahc_linux_setup_tag_info_global(char *p) |
| 890 | { |
| 891 | int tags, i, j; |
| 892 | |
| 893 | tags = simple_strtoul(p + 1, NULL, 0) & 0xff; |
| 894 | printf("Setting Global Tags= %d\n", tags); |
| 895 | |
| 896 | for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) { |
| 897 | for (j = 0; j < AHC_NUM_TARGETS; j++) { |
| 898 | aic7xxx_tag_info[i].tag_commands[j] = tags; |
| 899 | } |
| 900 | } |
| 901 | } |
| 902 | |
| 903 | static void |
| 904 | ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) |
| 905 | { |
| 906 | |
| 907 | if ((instance >= 0) && (targ >= 0) |
| 908 | && (instance < NUM_ELEMENTS(aic7xxx_tag_info)) |
| 909 | && (targ < AHC_NUM_TARGETS)) { |
| 910 | aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; |
| 911 | if (bootverbose) |
| 912 | printf("tag_info[%d:%d] = %d\n", instance, targ, value); |
| 913 | } |
| 914 | } |
| 915 | |
Christoph Hellwig | 1ff9273 | 2005-08-19 18:57:13 +0200 | [diff] [blame^] | 916 | static char * |
| 917 | ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, |
| 918 | void (*callback)(u_long, int, int, int32_t), |
| 919 | u_long callback_arg) |
| 920 | { |
| 921 | char *tok_end; |
| 922 | char *tok_end2; |
| 923 | int i; |
| 924 | int instance; |
| 925 | int targ; |
| 926 | int done; |
| 927 | char tok_list[] = {'.', ',', '{', '}', '\0'}; |
| 928 | |
| 929 | /* All options use a ':' name/arg separator */ |
| 930 | if (*opt_arg != ':') |
| 931 | return (opt_arg); |
| 932 | opt_arg++; |
| 933 | instance = -1; |
| 934 | targ = -1; |
| 935 | done = FALSE; |
| 936 | /* |
| 937 | * Restore separator that may be in |
| 938 | * the middle of our option argument. |
| 939 | */ |
| 940 | tok_end = strchr(opt_arg, '\0'); |
| 941 | if (tok_end < end) |
| 942 | *tok_end = ','; |
| 943 | while (!done) { |
| 944 | switch (*opt_arg) { |
| 945 | case '{': |
| 946 | if (instance == -1) { |
| 947 | instance = 0; |
| 948 | } else { |
| 949 | if (depth > 1) { |
| 950 | if (targ == -1) |
| 951 | targ = 0; |
| 952 | } else { |
| 953 | printf("Malformed Option %s\n", |
| 954 | opt_name); |
| 955 | done = TRUE; |
| 956 | } |
| 957 | } |
| 958 | opt_arg++; |
| 959 | break; |
| 960 | case '}': |
| 961 | if (targ != -1) |
| 962 | targ = -1; |
| 963 | else if (instance != -1) |
| 964 | instance = -1; |
| 965 | opt_arg++; |
| 966 | break; |
| 967 | case ',': |
| 968 | case '.': |
| 969 | if (instance == -1) |
| 970 | done = TRUE; |
| 971 | else if (targ >= 0) |
| 972 | targ++; |
| 973 | else if (instance >= 0) |
| 974 | instance++; |
| 975 | opt_arg++; |
| 976 | break; |
| 977 | case '\0': |
| 978 | done = TRUE; |
| 979 | break; |
| 980 | default: |
| 981 | tok_end = end; |
| 982 | for (i = 0; tok_list[i]; i++) { |
| 983 | tok_end2 = strchr(opt_arg, tok_list[i]); |
| 984 | if ((tok_end2) && (tok_end2 < tok_end)) |
| 985 | tok_end = tok_end2; |
| 986 | } |
| 987 | callback(callback_arg, instance, targ, |
| 988 | simple_strtol(opt_arg, NULL, 0)); |
| 989 | opt_arg = tok_end; |
| 990 | break; |
| 991 | } |
| 992 | } |
| 993 | return (opt_arg); |
| 994 | } |
| 995 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | /* |
| 997 | * Handle Linux boot parameters. This routine allows for assigning a value |
| 998 | * to a parameter with a ':' between the parameter and the value. |
| 999 | * ie. aic7xxx=stpwlev:1,extended |
| 1000 | */ |
| 1001 | static int |
| 1002 | aic7xxx_setup(char *s) |
| 1003 | { |
| 1004 | int i, n; |
| 1005 | char *p; |
| 1006 | char *end; |
| 1007 | |
| 1008 | static struct { |
| 1009 | const char *name; |
| 1010 | uint32_t *flag; |
| 1011 | } options[] = { |
| 1012 | { "extended", &aic7xxx_extended }, |
| 1013 | { "no_reset", &aic7xxx_no_reset }, |
| 1014 | { "verbose", &aic7xxx_verbose }, |
| 1015 | { "allow_memio", &aic7xxx_allow_memio}, |
| 1016 | #ifdef AHC_DEBUG |
| 1017 | { "debug", &ahc_debug }, |
| 1018 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | { "periodic_otag", &aic7xxx_periodic_otag }, |
| 1020 | { "pci_parity", &aic7xxx_pci_parity }, |
| 1021 | { "seltime", &aic7xxx_seltime }, |
| 1022 | { "tag_info", NULL }, |
| 1023 | { "global_tag_depth", NULL }, |
| 1024 | { "dv", NULL } |
| 1025 | }; |
| 1026 | |
| 1027 | end = strchr(s, '\0'); |
| 1028 | |
| 1029 | /* |
| 1030 | * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS |
| 1031 | * will never be 0 in this case. |
| 1032 | */ |
| 1033 | n = 0; |
| 1034 | |
| 1035 | while ((p = strsep(&s, ",.")) != NULL) { |
| 1036 | if (*p == '\0') |
| 1037 | continue; |
| 1038 | for (i = 0; i < NUM_ELEMENTS(options); i++) { |
| 1039 | |
| 1040 | n = strlen(options[i].name); |
| 1041 | if (strncmp(options[i].name, p, n) == 0) |
| 1042 | break; |
| 1043 | } |
| 1044 | if (i == NUM_ELEMENTS(options)) |
| 1045 | continue; |
| 1046 | |
| 1047 | if (strncmp(p, "global_tag_depth", n) == 0) { |
| 1048 | ahc_linux_setup_tag_info_global(p + n); |
| 1049 | } else if (strncmp(p, "tag_info", n) == 0) { |
Christoph Hellwig | 1ff9273 | 2005-08-19 18:57:13 +0200 | [diff] [blame^] | 1050 | s = ahc_parse_brace_option("tag_info", p + n, end, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | 2, ahc_linux_setup_tag_info, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | } else if (p[n] == ':') { |
| 1053 | *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); |
| 1054 | } else if (strncmp(p, "verbose", n) == 0) { |
| 1055 | *(options[i].flag) = 1; |
| 1056 | } else { |
| 1057 | *(options[i].flag) ^= 0xFFFFFFFF; |
| 1058 | } |
| 1059 | } |
| 1060 | return 1; |
| 1061 | } |
| 1062 | |
| 1063 | __setup("aic7xxx=", aic7xxx_setup); |
| 1064 | |
| 1065 | uint32_t aic7xxx_verbose; |
| 1066 | |
| 1067 | int |
Christoph Hellwig | 013791e | 2005-05-16 18:52:39 +0200 | [diff] [blame] | 1068 | ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1069 | { |
| 1070 | char buf[80]; |
| 1071 | struct Scsi_Host *host; |
| 1072 | char *new_name; |
| 1073 | u_long s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | |
| 1075 | template->name = ahc->description; |
| 1076 | host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); |
| 1077 | if (host == NULL) |
| 1078 | return (ENOMEM); |
| 1079 | |
| 1080 | *((struct ahc_softc **)host->hostdata) = ahc; |
| 1081 | ahc_lock(ahc, &s); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | scsi_assign_lock(host, &ahc->platform_data->spin_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | ahc->platform_data->host = host; |
| 1084 | host->can_queue = AHC_MAX_QUEUE; |
| 1085 | host->cmd_per_lun = 2; |
| 1086 | /* XXX No way to communicate the ID for multiple channels */ |
| 1087 | host->this_id = ahc->our_id; |
| 1088 | host->irq = ahc->platform_data->irq; |
| 1089 | host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; |
| 1090 | host->max_lun = AHC_NUM_LUNS; |
| 1091 | host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; |
| 1092 | host->sg_tablesize = AHC_NSEG; |
Christoph Hellwig | 2a40342 | 2005-06-28 16:50:40 +0200 | [diff] [blame] | 1093 | ahc_set_unit(ahc, ahc_linux_unit++); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | sprintf(buf, "scsi%d", host->host_no); |
| 1095 | new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); |
| 1096 | if (new_name != NULL) { |
| 1097 | strcpy(new_name, buf); |
| 1098 | ahc_set_name(ahc, new_name); |
| 1099 | } |
| 1100 | host->unique_id = ahc->unit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | ahc_linux_initialize_scsi_bus(ahc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | ahc_intr_enable(ahc, TRUE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | ahc_unlock(ahc, &s); |
| 1104 | |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 1105 | host->transportt = ahc_linux_transport_template; |
| 1106 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */ |
| 1108 | scsi_scan_host(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | return (0); |
| 1110 | } |
| 1111 | |
| 1112 | uint64_t |
| 1113 | ahc_linux_get_memsize(void) |
| 1114 | { |
| 1115 | struct sysinfo si; |
| 1116 | |
| 1117 | si_meminfo(&si); |
| 1118 | return ((uint64_t)si.totalram << PAGE_SHIFT); |
| 1119 | } |
| 1120 | |
| 1121 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | * Place the SCSI bus into a known state by either resetting it, |
| 1123 | * or forcing transfer negotiations on the next command to any |
| 1124 | * target. |
| 1125 | */ |
| 1126 | void |
| 1127 | ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) |
| 1128 | { |
| 1129 | int i; |
| 1130 | int numtarg; |
| 1131 | |
| 1132 | i = 0; |
| 1133 | numtarg = 0; |
| 1134 | |
| 1135 | if (aic7xxx_no_reset != 0) |
| 1136 | ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); |
| 1137 | |
| 1138 | if ((ahc->flags & AHC_RESET_BUS_A) != 0) |
| 1139 | ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); |
| 1140 | else |
| 1141 | numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; |
| 1142 | |
| 1143 | if ((ahc->features & AHC_TWIN) != 0) { |
| 1144 | |
| 1145 | if ((ahc->flags & AHC_RESET_BUS_B) != 0) { |
| 1146 | ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); |
| 1147 | } else { |
| 1148 | if (numtarg == 0) |
| 1149 | i = 8; |
| 1150 | numtarg += 8; |
| 1151 | } |
| 1152 | } |
| 1153 | |
| 1154 | /* |
| 1155 | * Force negotiation to async for all targets that |
| 1156 | * will not see an initial bus reset. |
| 1157 | */ |
| 1158 | for (; i < numtarg; i++) { |
| 1159 | struct ahc_devinfo devinfo; |
| 1160 | struct ahc_initiator_tinfo *tinfo; |
| 1161 | struct ahc_tmode_tstate *tstate; |
| 1162 | u_int our_id; |
| 1163 | u_int target_id; |
| 1164 | char channel; |
| 1165 | |
| 1166 | channel = 'A'; |
| 1167 | our_id = ahc->our_id; |
| 1168 | target_id = i; |
| 1169 | if (i > 7 && (ahc->features & AHC_TWIN) != 0) { |
| 1170 | channel = 'B'; |
| 1171 | our_id = ahc->our_id_b; |
| 1172 | target_id = i % 8; |
| 1173 | } |
| 1174 | tinfo = ahc_fetch_transinfo(ahc, channel, our_id, |
| 1175 | target_id, &tstate); |
| 1176 | ahc_compile_devinfo(&devinfo, our_id, target_id, |
| 1177 | CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); |
| 1178 | ahc_update_neg_request(ahc, &devinfo, tstate, |
| 1179 | tinfo, AHC_NEG_ALWAYS); |
| 1180 | } |
| 1181 | /* Give the bus some time to recover */ |
| 1182 | if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { |
| 1183 | ahc_linux_freeze_simq(ahc); |
| 1184 | init_timer(&ahc->platform_data->reset_timer); |
| 1185 | ahc->platform_data->reset_timer.data = (u_long)ahc; |
| 1186 | ahc->platform_data->reset_timer.expires = |
| 1187 | jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000; |
| 1188 | ahc->platform_data->reset_timer.function = |
| 1189 | ahc_linux_release_simq; |
| 1190 | add_timer(&ahc->platform_data->reset_timer); |
| 1191 | } |
| 1192 | } |
| 1193 | |
| 1194 | int |
| 1195 | ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) |
| 1196 | { |
| 1197 | |
| 1198 | ahc->platform_data = |
| 1199 | malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT); |
| 1200 | if (ahc->platform_data == NULL) |
| 1201 | return (ENOMEM); |
| 1202 | memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | ahc->platform_data->irq = AHC_LINUX_NOIRQ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | ahc_lockinit(ahc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | init_MUTEX_LOCKED(&ahc->platform_data->eh_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | ahc->seltime = (aic7xxx_seltime & 0x3) << 4; |
| 1207 | ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; |
| 1208 | if (aic7xxx_pci_parity == 0) |
| 1209 | ahc->flags |= AHC_DISABLE_PCI_PERR; |
| 1210 | |
| 1211 | return (0); |
| 1212 | } |
| 1213 | |
| 1214 | void |
| 1215 | ahc_platform_free(struct ahc_softc *ahc) |
| 1216 | { |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1217 | struct scsi_target *starget; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | int i, j; |
| 1219 | |
| 1220 | if (ahc->platform_data != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | if (ahc->platform_data->host != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | scsi_remove_host(ahc->platform_data->host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | scsi_host_put(ahc->platform_data->host); |
| 1224 | } |
| 1225 | |
| 1226 | /* destroy all of the device and target objects */ |
| 1227 | for (i = 0; i < AHC_NUM_TARGETS; i++) { |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1228 | starget = ahc->platform_data->starget[i]; |
| 1229 | if (starget != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | for (j = 0; j < AHC_NUM_LUNS; j++) { |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1231 | struct ahc_linux_target *targ = |
| 1232 | scsi_transport_target_data(starget); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1234 | if (targ->sdev[j] == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | continue; |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1236 | targ->sdev[j] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | } |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1238 | ahc->platform_data->starget[i] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | } |
| 1240 | } |
| 1241 | |
| 1242 | if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) |
| 1243 | free_irq(ahc->platform_data->irq, ahc); |
| 1244 | if (ahc->tag == BUS_SPACE_PIO |
| 1245 | && ahc->bsh.ioport != 0) |
| 1246 | release_region(ahc->bsh.ioport, 256); |
| 1247 | if (ahc->tag == BUS_SPACE_MEMIO |
| 1248 | && ahc->bsh.maddr != NULL) { |
| 1249 | iounmap(ahc->bsh.maddr); |
| 1250 | release_mem_region(ahc->platform_data->mem_busaddr, |
| 1251 | 0x1000); |
| 1252 | } |
Christoph Hellwig | dedd831 | 2005-05-16 18:52:06 +0200 | [diff] [blame] | 1253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | free(ahc->platform_data, M_DEVBUF); |
| 1255 | } |
| 1256 | } |
| 1257 | |
| 1258 | void |
| 1259 | ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) |
| 1260 | { |
| 1261 | ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), |
| 1262 | SCB_GET_CHANNEL(ahc, scb), |
| 1263 | SCB_GET_LUN(scb), SCB_LIST_NULL, |
| 1264 | ROLE_UNKNOWN, CAM_REQUEUE_REQ); |
| 1265 | } |
| 1266 | |
| 1267 | void |
| 1268 | ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, |
| 1269 | ahc_queue_alg alg) |
| 1270 | { |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1271 | struct scsi_target *starget; |
| 1272 | struct ahc_linux_target *targ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | struct ahc_linux_device *dev; |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1274 | struct scsi_device *sdev; |
| 1275 | u_int target_offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | int was_queuing; |
| 1277 | int now_queuing; |
| 1278 | |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1279 | target_offset = devinfo->target; |
| 1280 | if (devinfo->channel != 'A') |
| 1281 | target_offset += 8; |
| 1282 | starget = ahc->platform_data->starget[target_offset]; |
| 1283 | targ = scsi_transport_target_data(starget); |
| 1284 | BUG_ON(targ == NULL); |
| 1285 | sdev = targ->sdev[devinfo->lun]; |
| 1286 | if (sdev == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | return; |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1288 | dev = scsi_transport_device_data(sdev); |
| 1289 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); |
| 1291 | switch (alg) { |
| 1292 | default: |
| 1293 | case AHC_QUEUE_NONE: |
| 1294 | now_queuing = 0; |
| 1295 | break; |
| 1296 | case AHC_QUEUE_BASIC: |
| 1297 | now_queuing = AHC_DEV_Q_BASIC; |
| 1298 | break; |
| 1299 | case AHC_QUEUE_TAGGED: |
| 1300 | now_queuing = AHC_DEV_Q_TAGGED; |
| 1301 | break; |
| 1302 | } |
| 1303 | if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 |
| 1304 | && (was_queuing != now_queuing) |
| 1305 | && (dev->active != 0)) { |
| 1306 | dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; |
| 1307 | dev->qfrozen++; |
| 1308 | } |
| 1309 | |
| 1310 | dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); |
| 1311 | if (now_queuing) { |
| 1312 | u_int usertags; |
| 1313 | |
| 1314 | usertags = ahc_linux_user_tagdepth(ahc, devinfo); |
| 1315 | if (!was_queuing) { |
| 1316 | /* |
| 1317 | * Start out agressively and allow our |
| 1318 | * dynamic queue depth algorithm to take |
| 1319 | * care of the rest. |
| 1320 | */ |
| 1321 | dev->maxtags = usertags; |
| 1322 | dev->openings = dev->maxtags - dev->active; |
| 1323 | } |
| 1324 | if (dev->maxtags == 0) { |
| 1325 | /* |
| 1326 | * Queueing is disabled by the user. |
| 1327 | */ |
| 1328 | dev->openings = 1; |
| 1329 | } else if (alg == AHC_QUEUE_TAGGED) { |
| 1330 | dev->flags |= AHC_DEV_Q_TAGGED; |
| 1331 | if (aic7xxx_periodic_otag != 0) |
| 1332 | dev->flags |= AHC_DEV_PERIODIC_OTAG; |
| 1333 | } else |
| 1334 | dev->flags |= AHC_DEV_Q_BASIC; |
| 1335 | } else { |
| 1336 | /* We can only have one opening. */ |
| 1337 | dev->maxtags = 0; |
| 1338 | dev->openings = 1 - dev->active; |
| 1339 | } |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1340 | switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { |
| 1341 | case AHC_DEV_Q_BASIC: |
| 1342 | scsi_adjust_queue_depth(sdev, |
| 1343 | MSG_SIMPLE_TASK, |
| 1344 | dev->openings + dev->active); |
| 1345 | break; |
| 1346 | case AHC_DEV_Q_TAGGED: |
| 1347 | scsi_adjust_queue_depth(sdev, |
| 1348 | MSG_ORDERED_TASK, |
| 1349 | dev->openings + dev->active); |
| 1350 | break; |
| 1351 | default: |
| 1352 | /* |
| 1353 | * We allow the OS to queue 2 untagged transactions to |
| 1354 | * us at any time even though we can only execute them |
| 1355 | * serially on the controller/device. This should |
| 1356 | * remove some latency. |
| 1357 | */ |
| 1358 | scsi_adjust_queue_depth(sdev, |
| 1359 | /*NON-TAGGED*/0, |
| 1360 | /*queue depth*/2); |
| 1361 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | } |
| 1364 | |
| 1365 | int |
| 1366 | ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, |
| 1367 | int lun, u_int tag, role_t role, uint32_t status) |
| 1368 | { |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame] | 1369 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | } |
| 1371 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | static u_int |
| 1373 | ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) |
| 1374 | { |
| 1375 | static int warned_user; |
| 1376 | u_int tags; |
| 1377 | |
| 1378 | tags = 0; |
| 1379 | if ((ahc->user_discenable & devinfo->target_mask) != 0) { |
| 1380 | if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) { |
| 1381 | if (warned_user == 0) { |
| 1382 | |
| 1383 | printf(KERN_WARNING |
| 1384 | "aic7xxx: WARNING: Insufficient tag_info instances\n" |
| 1385 | "aic7xxx: for installed controllers. Using defaults\n" |
| 1386 | "aic7xxx: Please update the aic7xxx_tag_info array in\n" |
| 1387 | "aic7xxx: the aic7xxx_osm..c source file.\n"); |
| 1388 | warned_user++; |
| 1389 | } |
| 1390 | tags = AHC_MAX_QUEUE; |
| 1391 | } else { |
| 1392 | adapter_tag_info_t *tag_info; |
| 1393 | |
| 1394 | tag_info = &aic7xxx_tag_info[ahc->unit]; |
| 1395 | tags = tag_info->tag_commands[devinfo->target_offset]; |
| 1396 | if (tags > AHC_MAX_QUEUE) |
| 1397 | tags = AHC_MAX_QUEUE; |
| 1398 | } |
| 1399 | } |
| 1400 | return (tags); |
| 1401 | } |
| 1402 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | /* |
| 1404 | * Determines the queue depth for a given device. |
| 1405 | */ |
| 1406 | static void |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1407 | ahc_linux_device_queue_depth(struct scsi_device *sdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | { |
| 1409 | struct ahc_devinfo devinfo; |
| 1410 | u_int tags; |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1411 | struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | |
| 1413 | ahc_compile_devinfo(&devinfo, |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1414 | sdev->sdev_target->channel == 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | ? ahc->our_id : ahc->our_id_b, |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1416 | sdev->sdev_target->id, sdev->lun, |
| 1417 | sdev->sdev_target->channel == 0 ? 'A' : 'B', |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | ROLE_INITIATOR); |
| 1419 | tags = ahc_linux_user_tagdepth(ahc, &devinfo); |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1420 | if (tags != 0 && sdev->tagged_supported != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | |
| 1422 | ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED); |
| 1423 | ahc_print_devinfo(ahc, &devinfo); |
| 1424 | printf("Tagged Queuing enabled. Depth %d\n", tags); |
| 1425 | } else { |
| 1426 | ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE); |
| 1427 | } |
| 1428 | } |
| 1429 | |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame] | 1430 | static int |
| 1431 | ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, |
| 1432 | struct scsi_cmnd *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | struct scb *scb; |
| 1435 | struct hardware_scb *hscb; |
| 1436 | struct ahc_initiator_tinfo *tinfo; |
| 1437 | struct ahc_tmode_tstate *tstate; |
| 1438 | uint16_t mask; |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame] | 1439 | struct scb_tailq *untagged_q = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame] | 1441 | /* |
| 1442 | * Schedule us to run later. The only reason we are not |
| 1443 | * running is because the whole controller Q is frozen. |
| 1444 | */ |
| 1445 | if (ahc->platform_data->qfrozen != 0) |
| 1446 | return SCSI_MLQUEUE_HOST_BUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame] | 1448 | /* |
| 1449 | * We only allow one untagged transaction |
| 1450 | * per target in the initiator role unless |
| 1451 | * we are storing a full busy target *lun* |
| 1452 | * table in SCB space. |
| 1453 | */ |
| 1454 | if (!blk_rq_tagged(cmd->request) |
| 1455 | && (ahc->features & AHC_SCB_BTT) == 0) { |
| 1456 | int target_offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame] | 1458 | target_offset = cmd->device->id + cmd->device->channel * 8; |
| 1459 | untagged_q = &(ahc->untagged_queues[target_offset]); |
| 1460 | if (!TAILQ_EMPTY(untagged_q)) |
| 1461 | /* if we're already executing an untagged command |
| 1462 | * we're busy to another */ |
| 1463 | return SCSI_MLQUEUE_DEVICE_BUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | } |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame] | 1465 | |
| 1466 | /* |
| 1467 | * Get an scb to use. |
| 1468 | */ |
Christoph Hellwig | 8eb3794 | 2005-06-11 00:13:30 +0200 | [diff] [blame] | 1469 | scb = ahc_get_scb(ahc); |
| 1470 | if (!scb) |
| 1471 | return SCSI_MLQUEUE_HOST_BUSY; |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame] | 1472 | |
| 1473 | scb->io_ctx = cmd; |
| 1474 | scb->platform_data->dev = dev; |
| 1475 | hscb = scb->hscb; |
| 1476 | cmd->host_scribble = (char *)scb; |
| 1477 | |
| 1478 | /* |
| 1479 | * Fill out basics of the HSCB. |
| 1480 | */ |
| 1481 | hscb->control = 0; |
| 1482 | hscb->scsiid = BUILD_SCSIID(ahc, cmd); |
| 1483 | hscb->lun = cmd->device->lun; |
| 1484 | mask = SCB_GET_TARGET_MASK(ahc, scb); |
| 1485 | tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), |
| 1486 | SCB_GET_OUR_ID(scb), |
| 1487 | SCB_GET_TARGET(ahc, scb), &tstate); |
| 1488 | hscb->scsirate = tinfo->scsirate; |
| 1489 | hscb->scsioffset = tinfo->curr.offset; |
| 1490 | if ((tstate->ultraenb & mask) != 0) |
| 1491 | hscb->control |= ULTRAENB; |
| 1492 | |
| 1493 | if ((ahc->user_discenable & mask) != 0) |
| 1494 | hscb->control |= DISCENB; |
| 1495 | |
| 1496 | if ((tstate->auto_negotiate & mask) != 0) { |
| 1497 | scb->flags |= SCB_AUTO_NEGOTIATE; |
| 1498 | scb->hscb->control |= MK_MESSAGE; |
| 1499 | } |
| 1500 | |
| 1501 | if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame] | 1502 | int msg_bytes; |
| 1503 | uint8_t tag_msgs[2]; |
| 1504 | |
| 1505 | msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); |
| 1506 | if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { |
| 1507 | hscb->control |= tag_msgs[0]; |
| 1508 | if (tag_msgs[0] == MSG_ORDERED_TASK) |
| 1509 | dev->commands_since_idle_or_otag = 0; |
Christoph Hellwig | dedd831 | 2005-05-16 18:52:06 +0200 | [diff] [blame] | 1510 | } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH |
| 1511 | && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame] | 1512 | hscb->control |= MSG_ORDERED_TASK; |
| 1513 | dev->commands_since_idle_or_otag = 0; |
| 1514 | } else { |
| 1515 | hscb->control |= MSG_SIMPLE_TASK; |
| 1516 | } |
| 1517 | } |
| 1518 | |
| 1519 | hscb->cdb_len = cmd->cmd_len; |
| 1520 | if (hscb->cdb_len <= 12) { |
| 1521 | memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); |
| 1522 | } else { |
| 1523 | memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); |
| 1524 | scb->flags |= SCB_CDB32_PTR; |
| 1525 | } |
| 1526 | |
| 1527 | scb->platform_data->xfer_len = 0; |
| 1528 | ahc_set_residual(scb, 0); |
| 1529 | ahc_set_sense_residual(scb, 0); |
| 1530 | scb->sg_count = 0; |
| 1531 | if (cmd->use_sg != 0) { |
| 1532 | struct ahc_dma_seg *sg; |
| 1533 | struct scatterlist *cur_seg; |
| 1534 | struct scatterlist *end_seg; |
| 1535 | int nseg; |
| 1536 | |
| 1537 | cur_seg = (struct scatterlist *)cmd->request_buffer; |
| 1538 | nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg, |
| 1539 | cmd->sc_data_direction); |
| 1540 | end_seg = cur_seg + nseg; |
| 1541 | /* Copy the segments into the SG list. */ |
| 1542 | sg = scb->sg_list; |
| 1543 | /* |
| 1544 | * The sg_count may be larger than nseg if |
| 1545 | * a transfer crosses a 32bit page. |
| 1546 | */ |
| 1547 | while (cur_seg < end_seg) { |
| 1548 | dma_addr_t addr; |
| 1549 | bus_size_t len; |
| 1550 | int consumed; |
| 1551 | |
| 1552 | addr = sg_dma_address(cur_seg); |
| 1553 | len = sg_dma_len(cur_seg); |
| 1554 | consumed = ahc_linux_map_seg(ahc, scb, |
| 1555 | sg, addr, len); |
| 1556 | sg += consumed; |
| 1557 | scb->sg_count += consumed; |
| 1558 | cur_seg++; |
| 1559 | } |
| 1560 | sg--; |
| 1561 | sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); |
| 1562 | |
| 1563 | /* |
| 1564 | * Reset the sg list pointer. |
| 1565 | */ |
| 1566 | scb->hscb->sgptr = |
| 1567 | ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); |
| 1568 | |
| 1569 | /* |
| 1570 | * Copy the first SG into the "current" |
| 1571 | * data pointer area. |
| 1572 | */ |
| 1573 | scb->hscb->dataptr = scb->sg_list->addr; |
| 1574 | scb->hscb->datacnt = scb->sg_list->len; |
| 1575 | } else if (cmd->request_bufflen != 0) { |
| 1576 | struct ahc_dma_seg *sg; |
| 1577 | dma_addr_t addr; |
| 1578 | |
| 1579 | sg = scb->sg_list; |
| 1580 | addr = pci_map_single(ahc->dev_softc, |
| 1581 | cmd->request_buffer, |
| 1582 | cmd->request_bufflen, |
| 1583 | cmd->sc_data_direction); |
| 1584 | scb->platform_data->buf_busaddr = addr; |
| 1585 | scb->sg_count = ahc_linux_map_seg(ahc, scb, |
| 1586 | sg, addr, |
| 1587 | cmd->request_bufflen); |
| 1588 | sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); |
| 1589 | |
| 1590 | /* |
| 1591 | * Reset the sg list pointer. |
| 1592 | */ |
| 1593 | scb->hscb->sgptr = |
| 1594 | ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); |
| 1595 | |
| 1596 | /* |
| 1597 | * Copy the first SG into the "current" |
| 1598 | * data pointer area. |
| 1599 | */ |
| 1600 | scb->hscb->dataptr = sg->addr; |
| 1601 | scb->hscb->datacnt = sg->len; |
| 1602 | } else { |
| 1603 | scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); |
| 1604 | scb->hscb->dataptr = 0; |
| 1605 | scb->hscb->datacnt = 0; |
| 1606 | scb->sg_count = 0; |
| 1607 | } |
| 1608 | |
| 1609 | LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); |
| 1610 | dev->openings--; |
| 1611 | dev->active++; |
| 1612 | dev->commands_issued++; |
| 1613 | if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) |
| 1614 | dev->commands_since_idle_or_otag++; |
| 1615 | |
| 1616 | scb->flags |= SCB_ACTIVE; |
| 1617 | if (untagged_q) { |
| 1618 | TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); |
| 1619 | scb->flags |= SCB_UNTAGGEDQ; |
| 1620 | } |
| 1621 | ahc_queue_scb(ahc, scb); |
| 1622 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | } |
| 1624 | |
| 1625 | /* |
| 1626 | * SCSI controller interrupt handler. |
| 1627 | */ |
| 1628 | irqreturn_t |
| 1629 | ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs) |
| 1630 | { |
| 1631 | struct ahc_softc *ahc; |
| 1632 | u_long flags; |
| 1633 | int ours; |
| 1634 | |
| 1635 | ahc = (struct ahc_softc *) dev_id; |
| 1636 | ahc_lock(ahc, &flags); |
| 1637 | ours = ahc_intr(ahc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | ahc_unlock(ahc, &flags); |
| 1639 | return IRQ_RETVAL(ours); |
| 1640 | } |
| 1641 | |
| 1642 | void |
| 1643 | ahc_platform_flushwork(struct ahc_softc *ahc) |
| 1644 | { |
| 1645 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | } |
| 1647 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | void |
| 1649 | ahc_send_async(struct ahc_softc *ahc, char channel, |
| 1650 | u_int target, u_int lun, ac_code code, void *arg) |
| 1651 | { |
| 1652 | switch (code) { |
| 1653 | case AC_TRANSFER_NEG: |
| 1654 | { |
| 1655 | char buf[80]; |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1656 | struct scsi_target *starget; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | struct ahc_linux_target *targ; |
| 1658 | struct info_str info; |
| 1659 | struct ahc_initiator_tinfo *tinfo; |
| 1660 | struct ahc_tmode_tstate *tstate; |
| 1661 | int target_offset; |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1662 | unsigned int target_ppr_options; |
| 1663 | |
| 1664 | BUG_ON(target == CAM_TARGET_WILDCARD); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | |
| 1666 | info.buffer = buf; |
| 1667 | info.length = sizeof(buf); |
| 1668 | info.offset = 0; |
| 1669 | info.pos = 0; |
| 1670 | tinfo = ahc_fetch_transinfo(ahc, channel, |
| 1671 | channel == 'A' ? ahc->our_id |
| 1672 | : ahc->our_id_b, |
| 1673 | target, &tstate); |
| 1674 | |
| 1675 | /* |
| 1676 | * Don't bother reporting results while |
| 1677 | * negotiations are still pending. |
| 1678 | */ |
| 1679 | if (tinfo->curr.period != tinfo->goal.period |
| 1680 | || tinfo->curr.width != tinfo->goal.width |
| 1681 | || tinfo->curr.offset != tinfo->goal.offset |
| 1682 | || tinfo->curr.ppr_options != tinfo->goal.ppr_options) |
| 1683 | if (bootverbose == 0) |
| 1684 | break; |
| 1685 | |
| 1686 | /* |
| 1687 | * Don't bother reporting results that |
| 1688 | * are identical to those last reported. |
| 1689 | */ |
| 1690 | target_offset = target; |
| 1691 | if (channel == 'B') |
| 1692 | target_offset += 8; |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1693 | starget = ahc->platform_data->starget[target_offset]; |
James Bottomley | fc789a9 | 2005-08-05 16:24:54 -0500 | [diff] [blame] | 1694 | if (starget == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | break; |
James Bottomley | fc789a9 | 2005-08-05 16:24:54 -0500 | [diff] [blame] | 1696 | targ = scsi_transport_target_data(starget); |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1697 | |
| 1698 | target_ppr_options = |
| 1699 | (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) |
| 1700 | + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) |
| 1701 | + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); |
| 1702 | |
| 1703 | if (tinfo->curr.period == spi_period(starget) |
| 1704 | && tinfo->curr.width == spi_width(starget) |
| 1705 | && tinfo->curr.offset == spi_offset(starget) |
| 1706 | && tinfo->curr.ppr_options == target_ppr_options) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1707 | if (bootverbose == 0) |
| 1708 | break; |
| 1709 | |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1710 | spi_period(starget) = tinfo->curr.period; |
| 1711 | spi_width(starget) = tinfo->curr.width; |
| 1712 | spi_offset(starget) = tinfo->curr.offset; |
| 1713 | spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ; |
| 1714 | spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ; |
| 1715 | spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ; |
| 1716 | spi_display_xfer_agreement(starget); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1717 | break; |
| 1718 | } |
| 1719 | case AC_SENT_BDR: |
| 1720 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | WARN_ON(lun != CAM_LUN_WILDCARD); |
| 1722 | scsi_report_device_reset(ahc->platform_data->host, |
| 1723 | channel - 'A', target); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | break; |
| 1725 | } |
| 1726 | case AC_BUS_RESET: |
| 1727 | if (ahc->platform_data->host != NULL) { |
| 1728 | scsi_report_bus_reset(ahc->platform_data->host, |
| 1729 | channel - 'A'); |
| 1730 | } |
| 1731 | break; |
| 1732 | default: |
| 1733 | panic("ahc_send_async: Unexpected async event"); |
| 1734 | } |
| 1735 | } |
| 1736 | |
| 1737 | /* |
| 1738 | * Calls the higher level scsi done function and frees the scb. |
| 1739 | */ |
| 1740 | void |
| 1741 | ahc_done(struct ahc_softc *ahc, struct scb *scb) |
| 1742 | { |
Christoph Hellwig | 013791e | 2005-05-16 18:52:39 +0200 | [diff] [blame] | 1743 | struct scsi_cmnd *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1744 | struct ahc_linux_device *dev; |
| 1745 | |
| 1746 | LIST_REMOVE(scb, pending_links); |
| 1747 | if ((scb->flags & SCB_UNTAGGEDQ) != 0) { |
| 1748 | struct scb_tailq *untagged_q; |
| 1749 | int target_offset; |
| 1750 | |
| 1751 | target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); |
| 1752 | untagged_q = &(ahc->untagged_queues[target_offset]); |
| 1753 | TAILQ_REMOVE(untagged_q, scb, links.tqe); |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame] | 1754 | BUG_ON(!TAILQ_EMPTY(untagged_q)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | } |
| 1756 | |
| 1757 | if ((scb->flags & SCB_ACTIVE) == 0) { |
| 1758 | printf("SCB %d done'd twice\n", scb->hscb->tag); |
| 1759 | ahc_dump_card_state(ahc); |
| 1760 | panic("Stopping for safety"); |
| 1761 | } |
| 1762 | cmd = scb->io_ctx; |
| 1763 | dev = scb->platform_data->dev; |
| 1764 | dev->active--; |
| 1765 | dev->openings++; |
| 1766 | if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { |
| 1767 | cmd->result &= ~(CAM_DEV_QFRZN << 16); |
| 1768 | dev->qfrozen--; |
| 1769 | } |
| 1770 | ahc_linux_unmap_scb(ahc, scb); |
| 1771 | |
| 1772 | /* |
| 1773 | * Guard against stale sense data. |
| 1774 | * The Linux mid-layer assumes that sense |
| 1775 | * was retrieved anytime the first byte of |
| 1776 | * the sense buffer looks "sane". |
| 1777 | */ |
| 1778 | cmd->sense_buffer[0] = 0; |
| 1779 | if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { |
| 1780 | uint32_t amount_xferred; |
| 1781 | |
| 1782 | amount_xferred = |
| 1783 | ahc_get_transfer_length(scb) - ahc_get_residual(scb); |
| 1784 | if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { |
| 1785 | #ifdef AHC_DEBUG |
| 1786 | if ((ahc_debug & AHC_SHOW_MISC) != 0) { |
| 1787 | ahc_print_path(ahc, scb); |
| 1788 | printf("Set CAM_UNCOR_PARITY\n"); |
| 1789 | } |
| 1790 | #endif |
| 1791 | ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); |
| 1792 | #ifdef AHC_REPORT_UNDERFLOWS |
| 1793 | /* |
| 1794 | * This code is disabled by default as some |
| 1795 | * clients of the SCSI system do not properly |
| 1796 | * initialize the underflow parameter. This |
| 1797 | * results in spurious termination of commands |
| 1798 | * that complete as expected (e.g. underflow is |
| 1799 | * allowed as command can return variable amounts |
| 1800 | * of data. |
| 1801 | */ |
| 1802 | } else if (amount_xferred < scb->io_ctx->underflow) { |
| 1803 | u_int i; |
| 1804 | |
| 1805 | ahc_print_path(ahc, scb); |
| 1806 | printf("CDB:"); |
| 1807 | for (i = 0; i < scb->io_ctx->cmd_len; i++) |
| 1808 | printf(" 0x%x", scb->io_ctx->cmnd[i]); |
| 1809 | printf("\n"); |
| 1810 | ahc_print_path(ahc, scb); |
| 1811 | printf("Saw underflow (%ld of %ld bytes). " |
| 1812 | "Treated as error\n", |
| 1813 | ahc_get_residual(scb), |
| 1814 | ahc_get_transfer_length(scb)); |
| 1815 | ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); |
| 1816 | #endif |
| 1817 | } else { |
| 1818 | ahc_set_transaction_status(scb, CAM_REQ_CMP); |
| 1819 | } |
| 1820 | } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1821 | ahc_linux_handle_scsi_status(ahc, cmd->device, scb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1822 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | |
| 1824 | if (dev->openings == 1 |
| 1825 | && ahc_get_transaction_status(scb) == CAM_REQ_CMP |
| 1826 | && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) |
| 1827 | dev->tag_success_count++; |
| 1828 | /* |
| 1829 | * Some devices deal with temporary internal resource |
| 1830 | * shortages by returning queue full. When the queue |
| 1831 | * full occurrs, we throttle back. Slowly try to get |
| 1832 | * back to our previous queue depth. |
| 1833 | */ |
| 1834 | if ((dev->openings + dev->active) < dev->maxtags |
| 1835 | && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { |
| 1836 | dev->tag_success_count = 0; |
| 1837 | dev->openings++; |
| 1838 | } |
| 1839 | |
| 1840 | if (dev->active == 0) |
| 1841 | dev->commands_since_idle_or_otag = 0; |
| 1842 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1843 | if ((scb->flags & SCB_RECOVERY_SCB) != 0) { |
| 1844 | printf("Recovery SCB completes\n"); |
| 1845 | if (ahc_get_transaction_status(scb) == CAM_BDR_SENT |
| 1846 | || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) |
| 1847 | ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); |
| 1848 | if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) { |
| 1849 | ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE; |
| 1850 | up(&ahc->platform_data->eh_sem); |
| 1851 | } |
| 1852 | } |
| 1853 | |
| 1854 | ahc_free_scb(ahc, scb); |
| 1855 | ahc_linux_queue_cmd_complete(ahc, cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | } |
| 1857 | |
| 1858 | static void |
| 1859 | ahc_linux_handle_scsi_status(struct ahc_softc *ahc, |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1860 | struct scsi_device *sdev, struct scb *scb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1861 | { |
| 1862 | struct ahc_devinfo devinfo; |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1863 | struct ahc_linux_device *dev = scsi_transport_device_data(sdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | |
| 1865 | ahc_compile_devinfo(&devinfo, |
| 1866 | ahc->our_id, |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 1867 | sdev->sdev_target->id, sdev->lun, |
| 1868 | sdev->sdev_target->channel == 0 ? 'A' : 'B', |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | ROLE_INITIATOR); |
| 1870 | |
| 1871 | /* |
| 1872 | * We don't currently trust the mid-layer to |
| 1873 | * properly deal with queue full or busy. So, |
| 1874 | * when one occurs, we tell the mid-layer to |
| 1875 | * unconditionally requeue the command to us |
| 1876 | * so that we can retry it ourselves. We also |
| 1877 | * implement our own throttling mechanism so |
| 1878 | * we don't clobber the device with too many |
| 1879 | * commands. |
| 1880 | */ |
| 1881 | switch (ahc_get_scsi_status(scb)) { |
| 1882 | default: |
| 1883 | break; |
| 1884 | case SCSI_STATUS_CHECK_COND: |
| 1885 | case SCSI_STATUS_CMD_TERMINATED: |
| 1886 | { |
Christoph Hellwig | 013791e | 2005-05-16 18:52:39 +0200 | [diff] [blame] | 1887 | struct scsi_cmnd *cmd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | |
| 1889 | /* |
| 1890 | * Copy sense information to the OS's cmd |
| 1891 | * structure if it is available. |
| 1892 | */ |
| 1893 | cmd = scb->io_ctx; |
| 1894 | if (scb->flags & SCB_SENSE) { |
| 1895 | u_int sense_size; |
| 1896 | |
| 1897 | sense_size = MIN(sizeof(struct scsi_sense_data) |
| 1898 | - ahc_get_sense_residual(scb), |
| 1899 | sizeof(cmd->sense_buffer)); |
| 1900 | memcpy(cmd->sense_buffer, |
| 1901 | ahc_get_sense_buf(ahc, scb), sense_size); |
| 1902 | if (sense_size < sizeof(cmd->sense_buffer)) |
| 1903 | memset(&cmd->sense_buffer[sense_size], 0, |
| 1904 | sizeof(cmd->sense_buffer) - sense_size); |
| 1905 | cmd->result |= (DRIVER_SENSE << 24); |
| 1906 | #ifdef AHC_DEBUG |
| 1907 | if (ahc_debug & AHC_SHOW_SENSE) { |
| 1908 | int i; |
| 1909 | |
| 1910 | printf("Copied %d bytes of sense data:", |
| 1911 | sense_size); |
| 1912 | for (i = 0; i < sense_size; i++) { |
| 1913 | if ((i & 0xF) == 0) |
| 1914 | printf("\n"); |
| 1915 | printf("0x%x ", cmd->sense_buffer[i]); |
| 1916 | } |
| 1917 | printf("\n"); |
| 1918 | } |
| 1919 | #endif |
| 1920 | } |
| 1921 | break; |
| 1922 | } |
| 1923 | case SCSI_STATUS_QUEUE_FULL: |
| 1924 | { |
| 1925 | /* |
| 1926 | * By the time the core driver has returned this |
| 1927 | * command, all other commands that were queued |
| 1928 | * to us but not the device have been returned. |
| 1929 | * This ensures that dev->active is equal to |
| 1930 | * the number of commands actually queued to |
| 1931 | * the device. |
| 1932 | */ |
| 1933 | dev->tag_success_count = 0; |
| 1934 | if (dev->active != 0) { |
| 1935 | /* |
| 1936 | * Drop our opening count to the number |
| 1937 | * of commands currently outstanding. |
| 1938 | */ |
| 1939 | dev->openings = 0; |
| 1940 | /* |
| 1941 | ahc_print_path(ahc, scb); |
| 1942 | printf("Dropping tag count to %d\n", dev->active); |
| 1943 | */ |
| 1944 | if (dev->active == dev->tags_on_last_queuefull) { |
| 1945 | |
| 1946 | dev->last_queuefull_same_count++; |
| 1947 | /* |
| 1948 | * If we repeatedly see a queue full |
| 1949 | * at the same queue depth, this |
| 1950 | * device has a fixed number of tag |
| 1951 | * slots. Lock in this tag depth |
| 1952 | * so we stop seeing queue fulls from |
| 1953 | * this device. |
| 1954 | */ |
| 1955 | if (dev->last_queuefull_same_count |
| 1956 | == AHC_LOCK_TAGS_COUNT) { |
| 1957 | dev->maxtags = dev->active; |
| 1958 | ahc_print_path(ahc, scb); |
| 1959 | printf("Locking max tag count at %d\n", |
| 1960 | dev->active); |
| 1961 | } |
| 1962 | } else { |
| 1963 | dev->tags_on_last_queuefull = dev->active; |
| 1964 | dev->last_queuefull_same_count = 0; |
| 1965 | } |
| 1966 | ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); |
| 1967 | ahc_set_scsi_status(scb, SCSI_STATUS_OK); |
| 1968 | ahc_platform_set_tags(ahc, &devinfo, |
| 1969 | (dev->flags & AHC_DEV_Q_BASIC) |
| 1970 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); |
| 1971 | break; |
| 1972 | } |
| 1973 | /* |
| 1974 | * Drop down to a single opening, and treat this |
| 1975 | * as if the target returned BUSY SCSI status. |
| 1976 | */ |
| 1977 | dev->openings = 1; |
| 1978 | ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); |
| 1979 | ahc_platform_set_tags(ahc, &devinfo, |
| 1980 | (dev->flags & AHC_DEV_Q_BASIC) |
| 1981 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1982 | break; |
| 1983 | } |
| 1984 | } |
| 1985 | } |
| 1986 | |
| 1987 | static void |
Christoph Hellwig | 013791e | 2005-05-16 18:52:39 +0200 | [diff] [blame] | 1988 | ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | { |
| 1990 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | * Map CAM error codes into Linux Error codes. We |
| 1992 | * avoid the conversion so that the DV code has the |
| 1993 | * full error information available when making |
| 1994 | * state change decisions. |
| 1995 | */ |
| cb62402 | 2005-04-17 18:03:20 -0500 | [diff] [blame] | 1996 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | u_int new_status; |
| 1998 | |
| 1999 | switch (ahc_cmd_get_transaction_status(cmd)) { |
| 2000 | case CAM_REQ_INPROG: |
| 2001 | case CAM_REQ_CMP: |
| 2002 | case CAM_SCSI_STATUS_ERROR: |
| 2003 | new_status = DID_OK; |
| 2004 | break; |
| 2005 | case CAM_REQ_ABORTED: |
| 2006 | new_status = DID_ABORT; |
| 2007 | break; |
| 2008 | case CAM_BUSY: |
| 2009 | new_status = DID_BUS_BUSY; |
| 2010 | break; |
| 2011 | case CAM_REQ_INVALID: |
| 2012 | case CAM_PATH_INVALID: |
| 2013 | new_status = DID_BAD_TARGET; |
| 2014 | break; |
| 2015 | case CAM_SEL_TIMEOUT: |
| 2016 | new_status = DID_NO_CONNECT; |
| 2017 | break; |
| 2018 | case CAM_SCSI_BUS_RESET: |
| 2019 | case CAM_BDR_SENT: |
| 2020 | new_status = DID_RESET; |
| 2021 | break; |
| 2022 | case CAM_UNCOR_PARITY: |
| 2023 | new_status = DID_PARITY; |
| 2024 | break; |
| 2025 | case CAM_CMD_TIMEOUT: |
| 2026 | new_status = DID_TIME_OUT; |
| 2027 | break; |
| 2028 | case CAM_UA_ABORT: |
| 2029 | case CAM_REQ_CMP_ERR: |
| 2030 | case CAM_AUTOSENSE_FAIL: |
| 2031 | case CAM_NO_HBA: |
| 2032 | case CAM_DATA_RUN_ERR: |
| 2033 | case CAM_UNEXP_BUSFREE: |
| 2034 | case CAM_SEQUENCE_FAIL: |
| 2035 | case CAM_CCB_LEN_ERR: |
| 2036 | case CAM_PROVIDE_FAIL: |
| 2037 | case CAM_REQ_TERMIO: |
| 2038 | case CAM_UNREC_HBA_ERROR: |
| 2039 | case CAM_REQ_TOO_BIG: |
| 2040 | new_status = DID_ERROR; |
| 2041 | break; |
| 2042 | case CAM_REQUEUE_REQ: |
James Bottomley | 8e45ebc | 2005-05-17 00:06:08 -0500 | [diff] [blame] | 2043 | new_status = DID_REQUEUE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2044 | break; |
| 2045 | default: |
| 2046 | /* We should never get here */ |
| 2047 | new_status = DID_ERROR; |
| 2048 | break; |
| 2049 | } |
| 2050 | |
| 2051 | ahc_cmd_set_transaction_status(cmd, new_status); |
| 2052 | } |
| 2053 | |
James Bottomley | 8e45ebc | 2005-05-17 00:06:08 -0500 | [diff] [blame] | 2054 | cmd->scsi_done(cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2055 | } |
| 2056 | |
| 2057 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | ahc_linux_sem_timeout(u_long arg) |
| 2059 | { |
| 2060 | struct ahc_softc *ahc; |
| 2061 | u_long s; |
| 2062 | |
| 2063 | ahc = (struct ahc_softc *)arg; |
| 2064 | |
| 2065 | ahc_lock(ahc, &s); |
| 2066 | if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) { |
| 2067 | ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE; |
| 2068 | up(&ahc->platform_data->eh_sem); |
| 2069 | } |
| 2070 | ahc_unlock(ahc, &s); |
| 2071 | } |
| 2072 | |
| 2073 | static void |
| 2074 | ahc_linux_freeze_simq(struct ahc_softc *ahc) |
| 2075 | { |
| 2076 | ahc->platform_data->qfrozen++; |
| 2077 | if (ahc->platform_data->qfrozen == 1) { |
| 2078 | scsi_block_requests(ahc->platform_data->host); |
| 2079 | |
| 2080 | /* XXX What about Twin channels? */ |
| 2081 | ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, |
| 2082 | CAM_LUN_WILDCARD, SCB_LIST_NULL, |
| 2083 | ROLE_INITIATOR, CAM_REQUEUE_REQ); |
| 2084 | } |
| 2085 | } |
| 2086 | |
| 2087 | static void |
| 2088 | ahc_linux_release_simq(u_long arg) |
| 2089 | { |
| 2090 | struct ahc_softc *ahc; |
| 2091 | u_long s; |
| 2092 | int unblock_reqs; |
| 2093 | |
| 2094 | ahc = (struct ahc_softc *)arg; |
| 2095 | |
| 2096 | unblock_reqs = 0; |
| 2097 | ahc_lock(ahc, &s); |
| 2098 | if (ahc->platform_data->qfrozen > 0) |
| 2099 | ahc->platform_data->qfrozen--; |
| 2100 | if (ahc->platform_data->qfrozen == 0) |
| 2101 | unblock_reqs = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | ahc_unlock(ahc, &s); |
| 2103 | /* |
| 2104 | * There is still a race here. The mid-layer |
| 2105 | * should keep its own freeze count and use |
| 2106 | * a bottom half handler to run the queues |
| 2107 | * so we can unblock with our own lock held. |
| 2108 | */ |
| 2109 | if (unblock_reqs) |
| 2110 | scsi_unblock_requests(ahc->platform_data->host); |
| 2111 | } |
| 2112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2113 | static int |
Christoph Hellwig | 013791e | 2005-05-16 18:52:39 +0200 | [diff] [blame] | 2114 | ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | { |
| 2116 | struct ahc_softc *ahc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2117 | struct ahc_linux_device *dev; |
| 2118 | struct scb *pending_scb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2119 | u_int saved_scbptr; |
| 2120 | u_int active_scb_index; |
| 2121 | u_int last_phase; |
| 2122 | u_int saved_scsiid; |
| 2123 | u_int cdb_byte; |
| 2124 | int retval; |
| 2125 | int was_paused; |
| 2126 | int paused; |
| 2127 | int wait; |
| 2128 | int disconnected; |
| 2129 | |
| 2130 | pending_scb = NULL; |
| 2131 | paused = FALSE; |
| 2132 | wait = FALSE; |
| 2133 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2134 | |
| 2135 | printf("%s:%d:%d:%d: Attempting to queue a%s message\n", |
| 2136 | ahc_name(ahc), cmd->device->channel, |
| 2137 | cmd->device->id, cmd->device->lun, |
| 2138 | flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); |
| 2139 | |
| 2140 | printf("CDB:"); |
| 2141 | for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) |
| 2142 | printf(" 0x%x", cmd->cmnd[cdb_byte]); |
| 2143 | printf("\n"); |
| 2144 | |
Jeff Garzik | 8fa728a | 2005-05-28 07:54:40 -0400 | [diff] [blame] | 2145 | spin_lock_irq(&ahc->platform_data->spin_lock); |
| 2146 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2148 | * First determine if we currently own this command. |
| 2149 | * Start by searching the device queue. If not found |
| 2150 | * there, check the pending_scb list. If not found |
| 2151 | * at all, and the system wanted us to just abort the |
| 2152 | * command, return success. |
| 2153 | */ |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 2154 | dev = scsi_transport_device_data(cmd->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | |
| 2156 | if (dev == NULL) { |
| 2157 | /* |
| 2158 | * No target device for this command exists, |
| 2159 | * so we must not still own the command. |
| 2160 | */ |
| 2161 | printf("%s:%d:%d:%d: Is not an active device\n", |
| 2162 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
| 2163 | cmd->device->lun); |
| 2164 | retval = SUCCESS; |
| 2165 | goto no_cmd; |
| 2166 | } |
| 2167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2168 | if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 |
| 2169 | && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, |
| 2170 | cmd->device->channel + 'A', |
| 2171 | cmd->device->lun, |
| 2172 | CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { |
| 2173 | printf("%s:%d:%d:%d: Command found on untagged queue\n", |
| 2174 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
| 2175 | cmd->device->lun); |
| 2176 | retval = SUCCESS; |
| 2177 | goto done; |
| 2178 | } |
| 2179 | |
| 2180 | /* |
| 2181 | * See if we can find a matching cmd in the pending list. |
| 2182 | */ |
| 2183 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { |
| 2184 | if (pending_scb->io_ctx == cmd) |
| 2185 | break; |
| 2186 | } |
| 2187 | |
| 2188 | if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { |
| 2189 | |
| 2190 | /* Any SCB for this device will do for a target reset */ |
| 2191 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { |
| 2192 | if (ahc_match_scb(ahc, pending_scb, cmd->device->id, |
| 2193 | cmd->device->channel + 'A', |
| 2194 | CAM_LUN_WILDCARD, |
| 2195 | SCB_LIST_NULL, ROLE_INITIATOR) == 0) |
| 2196 | break; |
| 2197 | } |
| 2198 | } |
| 2199 | |
| 2200 | if (pending_scb == NULL) { |
| 2201 | printf("%s:%d:%d:%d: Command not found\n", |
| 2202 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
| 2203 | cmd->device->lun); |
| 2204 | goto no_cmd; |
| 2205 | } |
| 2206 | |
| 2207 | if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { |
| 2208 | /* |
| 2209 | * We can't queue two recovery actions using the same SCB |
| 2210 | */ |
| 2211 | retval = FAILED; |
| 2212 | goto done; |
| 2213 | } |
| 2214 | |
| 2215 | /* |
| 2216 | * Ensure that the card doesn't do anything |
| 2217 | * behind our back and that we didn't "just" miss |
| 2218 | * an interrupt that would affect this cmd. |
| 2219 | */ |
| 2220 | was_paused = ahc_is_paused(ahc); |
| 2221 | ahc_pause_and_flushwork(ahc); |
| 2222 | paused = TRUE; |
| 2223 | |
| 2224 | if ((pending_scb->flags & SCB_ACTIVE) == 0) { |
| 2225 | printf("%s:%d:%d:%d: Command already completed\n", |
| 2226 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
| 2227 | cmd->device->lun); |
| 2228 | goto no_cmd; |
| 2229 | } |
| 2230 | |
| 2231 | printf("%s: At time of recovery, card was %spaused\n", |
| 2232 | ahc_name(ahc), was_paused ? "" : "not "); |
| 2233 | ahc_dump_card_state(ahc); |
| 2234 | |
| 2235 | disconnected = TRUE; |
| 2236 | if (flag == SCB_ABORT) { |
| 2237 | if (ahc_search_qinfifo(ahc, cmd->device->id, |
| 2238 | cmd->device->channel + 'A', |
| 2239 | cmd->device->lun, |
| 2240 | pending_scb->hscb->tag, |
| 2241 | ROLE_INITIATOR, CAM_REQ_ABORTED, |
| 2242 | SEARCH_COMPLETE) > 0) { |
| 2243 | printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", |
| 2244 | ahc_name(ahc), cmd->device->channel, |
| 2245 | cmd->device->id, cmd->device->lun); |
| 2246 | retval = SUCCESS; |
| 2247 | goto done; |
| 2248 | } |
| 2249 | } else if (ahc_search_qinfifo(ahc, cmd->device->id, |
| 2250 | cmd->device->channel + 'A', |
| 2251 | cmd->device->lun, pending_scb->hscb->tag, |
| 2252 | ROLE_INITIATOR, /*status*/0, |
| 2253 | SEARCH_COUNT) > 0) { |
| 2254 | disconnected = FALSE; |
| 2255 | } |
| 2256 | |
| 2257 | if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { |
| 2258 | struct scb *bus_scb; |
| 2259 | |
| 2260 | bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); |
| 2261 | if (bus_scb == pending_scb) |
| 2262 | disconnected = FALSE; |
| 2263 | else if (flag != SCB_ABORT |
| 2264 | && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid |
| 2265 | && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) |
| 2266 | disconnected = FALSE; |
| 2267 | } |
| 2268 | |
| 2269 | /* |
| 2270 | * At this point, pending_scb is the scb associated with the |
| 2271 | * passed in command. That command is currently active on the |
| 2272 | * bus, is in the disconnected state, or we're hoping to find |
| 2273 | * a command for the same target active on the bus to abuse to |
| 2274 | * send a BDR. Queue the appropriate message based on which of |
| 2275 | * these states we are in. |
| 2276 | */ |
| 2277 | last_phase = ahc_inb(ahc, LASTPHASE); |
| 2278 | saved_scbptr = ahc_inb(ahc, SCBPTR); |
| 2279 | active_scb_index = ahc_inb(ahc, SCB_TAG); |
| 2280 | saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); |
| 2281 | if (last_phase != P_BUSFREE |
| 2282 | && (pending_scb->hscb->tag == active_scb_index |
| 2283 | || (flag == SCB_DEVICE_RESET |
| 2284 | && SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) { |
| 2285 | |
| 2286 | /* |
| 2287 | * We're active on the bus, so assert ATN |
| 2288 | * and hope that the target responds. |
| 2289 | */ |
| 2290 | pending_scb = ahc_lookup_scb(ahc, active_scb_index); |
| 2291 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; |
| 2292 | ahc_outb(ahc, MSG_OUT, HOST_MSG); |
| 2293 | ahc_outb(ahc, SCSISIGO, last_phase|ATNO); |
| 2294 | printf("%s:%d:%d:%d: Device is active, asserting ATN\n", |
| 2295 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
| 2296 | cmd->device->lun); |
| 2297 | wait = TRUE; |
| 2298 | } else if (disconnected) { |
| 2299 | |
| 2300 | /* |
| 2301 | * Actually re-queue this SCB in an attempt |
| 2302 | * to select the device before it reconnects. |
| 2303 | * In either case (selection or reselection), |
| 2304 | * we will now issue the approprate message |
| 2305 | * to the timed-out device. |
| 2306 | * |
| 2307 | * Set the MK_MESSAGE control bit indicating |
| 2308 | * that we desire to send a message. We |
| 2309 | * also set the disconnected flag since |
| 2310 | * in the paging case there is no guarantee |
| 2311 | * that our SCB control byte matches the |
| 2312 | * version on the card. We don't want the |
| 2313 | * sequencer to abort the command thinking |
| 2314 | * an unsolicited reselection occurred. |
| 2315 | */ |
| 2316 | pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; |
| 2317 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; |
| 2318 | |
| 2319 | /* |
| 2320 | * Remove any cached copy of this SCB in the |
| 2321 | * disconnected list in preparation for the |
| 2322 | * queuing of our abort SCB. We use the |
| 2323 | * same element in the SCB, SCB_NEXT, for |
| 2324 | * both the qinfifo and the disconnected list. |
| 2325 | */ |
| 2326 | ahc_search_disc_list(ahc, cmd->device->id, |
| 2327 | cmd->device->channel + 'A', |
| 2328 | cmd->device->lun, pending_scb->hscb->tag, |
| 2329 | /*stop_on_first*/TRUE, |
| 2330 | /*remove*/TRUE, |
| 2331 | /*save_state*/FALSE); |
| 2332 | |
| 2333 | /* |
| 2334 | * In the non-paging case, the sequencer will |
| 2335 | * never re-reference the in-core SCB. |
| 2336 | * To make sure we are notified during |
| 2337 | * reslection, set the MK_MESSAGE flag in |
| 2338 | * the card's copy of the SCB. |
| 2339 | */ |
| 2340 | if ((ahc->flags & AHC_PAGESCBS) == 0) { |
| 2341 | ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); |
| 2342 | ahc_outb(ahc, SCB_CONTROL, |
| 2343 | ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); |
| 2344 | } |
| 2345 | |
| 2346 | /* |
| 2347 | * Clear out any entries in the QINFIFO first |
| 2348 | * so we are the next SCB for this target |
| 2349 | * to run. |
| 2350 | */ |
| 2351 | ahc_search_qinfifo(ahc, cmd->device->id, |
| 2352 | cmd->device->channel + 'A', |
| 2353 | cmd->device->lun, SCB_LIST_NULL, |
| 2354 | ROLE_INITIATOR, CAM_REQUEUE_REQ, |
| 2355 | SEARCH_COMPLETE); |
| 2356 | ahc_qinfifo_requeue_tail(ahc, pending_scb); |
| 2357 | ahc_outb(ahc, SCBPTR, saved_scbptr); |
| 2358 | ahc_print_path(ahc, pending_scb); |
| 2359 | printf("Device is disconnected, re-queuing SCB\n"); |
| 2360 | wait = TRUE; |
| 2361 | } else { |
| 2362 | printf("%s:%d:%d:%d: Unable to deliver message\n", |
| 2363 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
| 2364 | cmd->device->lun); |
| 2365 | retval = FAILED; |
| 2366 | goto done; |
| 2367 | } |
| 2368 | |
| 2369 | no_cmd: |
| 2370 | /* |
| 2371 | * Our assumption is that if we don't have the command, no |
| 2372 | * recovery action was required, so we return success. Again, |
| 2373 | * the semantics of the mid-layer recovery engine are not |
| 2374 | * well defined, so this may change in time. |
| 2375 | */ |
| 2376 | retval = SUCCESS; |
| 2377 | done: |
| 2378 | if (paused) |
| 2379 | ahc_unpause(ahc); |
| 2380 | if (wait) { |
| 2381 | struct timer_list timer; |
| 2382 | int ret; |
| 2383 | |
| 2384 | ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE; |
| 2385 | spin_unlock_irq(&ahc->platform_data->spin_lock); |
| 2386 | init_timer(&timer); |
| 2387 | timer.data = (u_long)ahc; |
| 2388 | timer.expires = jiffies + (5 * HZ); |
| 2389 | timer.function = ahc_linux_sem_timeout; |
| 2390 | add_timer(&timer); |
| 2391 | printf("Recovery code sleeping\n"); |
| 2392 | down(&ahc->platform_data->eh_sem); |
| 2393 | printf("Recovery code awake\n"); |
| 2394 | ret = del_timer_sync(&timer); |
| 2395 | if (ret == 0) { |
| 2396 | printf("Timer Expired\n"); |
| 2397 | retval = FAILED; |
| 2398 | } |
| 2399 | spin_lock_irq(&ahc->platform_data->spin_lock); |
| 2400 | } |
Jeff Garzik | 8fa728a | 2005-05-28 07:54:40 -0400 | [diff] [blame] | 2401 | |
| 2402 | spin_unlock_irq(&ahc->platform_data->spin_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2403 | return (retval); |
| 2404 | } |
| 2405 | |
| 2406 | void |
| 2407 | ahc_platform_dump_card_state(struct ahc_softc *ahc) |
| 2408 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2409 | } |
| 2410 | |
James Bottomley | fad01ef | 2005-05-08 16:00:15 -0500 | [diff] [blame] | 2411 | static void ahc_linux_set_width(struct scsi_target *starget, int width) |
| 2412 | { |
| 2413 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2414 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 2415 | struct ahc_devinfo devinfo; |
| 2416 | unsigned long flags; |
| 2417 | |
| 2418 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2419 | starget->channel + 'A', ROLE_INITIATOR); |
| 2420 | ahc_lock(ahc, &flags); |
| 2421 | ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); |
| 2422 | ahc_unlock(ahc, &flags); |
| 2423 | } |
| 2424 | |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2425 | static void ahc_linux_set_period(struct scsi_target *starget, int period) |
| 2426 | { |
| 2427 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2428 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 2429 | struct ahc_tmode_tstate *tstate; |
| 2430 | struct ahc_initiator_tinfo *tinfo |
| 2431 | = ahc_fetch_transinfo(ahc, |
| 2432 | starget->channel + 'A', |
| 2433 | shost->this_id, starget->id, &tstate); |
| 2434 | struct ahc_devinfo devinfo; |
James Bottomley | 597487b | 2005-06-03 09:49:01 -0500 | [diff] [blame] | 2435 | unsigned int ppr_options = tinfo->goal.ppr_options; |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2436 | unsigned long flags; |
James Bottomley | 597487b | 2005-06-03 09:49:01 -0500 | [diff] [blame] | 2437 | unsigned long offset = tinfo->goal.offset; |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2438 | struct ahc_syncrate *syncrate; |
| 2439 | |
| 2440 | if (offset == 0) |
| 2441 | offset = MAX_OFFSET; |
| 2442 | |
James Bottomley | 2bf2c56 | 2005-05-19 21:30:13 -0500 | [diff] [blame] | 2443 | if (period < 9) |
| 2444 | period = 9; /* 12.5ns is our minimum */ |
| 2445 | if (period == 9) |
| 2446 | ppr_options |= MSG_EXT_PPR_DT_REQ; |
| 2447 | |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2448 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2449 | starget->channel + 'A', ROLE_INITIATOR); |
James Bottomley | fad01ef | 2005-05-08 16:00:15 -0500 | [diff] [blame] | 2450 | |
| 2451 | /* all PPR requests apart from QAS require wide transfers */ |
| 2452 | if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { |
James Bottomley | fad01ef | 2005-05-08 16:00:15 -0500 | [diff] [blame] | 2453 | if (spi_width(starget) == 0) |
| 2454 | ppr_options &= MSG_EXT_PPR_QAS_REQ; |
| 2455 | } |
| 2456 | |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2457 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
| 2458 | ahc_lock(ahc, &flags); |
| 2459 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, |
| 2460 | ppr_options, AHC_TRANS_GOAL, FALSE); |
| 2461 | ahc_unlock(ahc, &flags); |
| 2462 | } |
| 2463 | |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2464 | static void ahc_linux_set_offset(struct scsi_target *starget, int offset) |
| 2465 | { |
| 2466 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2467 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 2468 | struct ahc_tmode_tstate *tstate; |
| 2469 | struct ahc_initiator_tinfo *tinfo |
| 2470 | = ahc_fetch_transinfo(ahc, |
| 2471 | starget->channel + 'A', |
| 2472 | shost->this_id, starget->id, &tstate); |
| 2473 | struct ahc_devinfo devinfo; |
| 2474 | unsigned int ppr_options = 0; |
| 2475 | unsigned int period = 0; |
| 2476 | unsigned long flags; |
| 2477 | struct ahc_syncrate *syncrate = NULL; |
| 2478 | |
| 2479 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2480 | starget->channel + 'A', ROLE_INITIATOR); |
| 2481 | if (offset != 0) { |
| 2482 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
James Bottomley | 597487b | 2005-06-03 09:49:01 -0500 | [diff] [blame] | 2483 | period = tinfo->goal.period; |
| 2484 | ppr_options = tinfo->goal.ppr_options; |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2485 | } |
| 2486 | ahc_lock(ahc, &flags); |
| 2487 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, |
| 2488 | ppr_options, AHC_TRANS_GOAL, FALSE); |
| 2489 | ahc_unlock(ahc, &flags); |
| 2490 | } |
| 2491 | |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2492 | static void ahc_linux_set_dt(struct scsi_target *starget, int dt) |
| 2493 | { |
| 2494 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2495 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 2496 | struct ahc_tmode_tstate *tstate; |
| 2497 | struct ahc_initiator_tinfo *tinfo |
| 2498 | = ahc_fetch_transinfo(ahc, |
| 2499 | starget->channel + 'A', |
| 2500 | shost->this_id, starget->id, &tstate); |
| 2501 | struct ahc_devinfo devinfo; |
James Bottomley | 597487b | 2005-06-03 09:49:01 -0500 | [diff] [blame] | 2502 | unsigned int ppr_options = tinfo->goal.ppr_options |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2503 | & ~MSG_EXT_PPR_DT_REQ; |
James Bottomley | 597487b | 2005-06-03 09:49:01 -0500 | [diff] [blame] | 2504 | unsigned int period = tinfo->goal.period; |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2505 | unsigned long flags; |
| 2506 | struct ahc_syncrate *syncrate; |
| 2507 | |
James Bottomley | 2bf2c56 | 2005-05-19 21:30:13 -0500 | [diff] [blame] | 2508 | if (dt) { |
| 2509 | period = 9; /* 12.5ns is the only period valid for DT */ |
| 2510 | ppr_options |= MSG_EXT_PPR_DT_REQ; |
| 2511 | } else if (period == 9) |
| 2512 | period = 10; /* if resetting DT, period must be >= 25ns */ |
| 2513 | |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2514 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2515 | starget->channel + 'A', ROLE_INITIATOR); |
James Bottomley | fad01ef | 2005-05-08 16:00:15 -0500 | [diff] [blame] | 2516 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2517 | ahc_lock(ahc, &flags); |
James Bottomley | 597487b | 2005-06-03 09:49:01 -0500 | [diff] [blame] | 2518 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2519 | ppr_options, AHC_TRANS_GOAL, FALSE); |
| 2520 | ahc_unlock(ahc, &flags); |
| 2521 | } |
| 2522 | |
James Bottomley | ace4e71 | 2005-07-02 14:46:14 -0500 | [diff] [blame] | 2523 | #if 0 |
| 2524 | /* FIXME: This code claims to support IU and QAS. However, the actual |
| 2525 | * sequencer code and aic7xxx_core have no support for these parameters and |
| 2526 | * will get into a bad state if they're negotiated. Do not enable this |
| 2527 | * unless you know what you're doing */ |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2528 | static void ahc_linux_set_qas(struct scsi_target *starget, int qas) |
| 2529 | { |
| 2530 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2531 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 2532 | struct ahc_tmode_tstate *tstate; |
| 2533 | struct ahc_initiator_tinfo *tinfo |
| 2534 | = ahc_fetch_transinfo(ahc, |
| 2535 | starget->channel + 'A', |
| 2536 | shost->this_id, starget->id, &tstate); |
| 2537 | struct ahc_devinfo devinfo; |
James Bottomley | 597487b | 2005-06-03 09:49:01 -0500 | [diff] [blame] | 2538 | unsigned int ppr_options = tinfo->goal.ppr_options |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2539 | & ~MSG_EXT_PPR_QAS_REQ; |
James Bottomley | 597487b | 2005-06-03 09:49:01 -0500 | [diff] [blame] | 2540 | unsigned int period = tinfo->goal.period; |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2541 | unsigned long flags; |
| 2542 | struct ahc_syncrate *syncrate; |
| 2543 | |
| 2544 | if (qas) |
| 2545 | ppr_options |= MSG_EXT_PPR_QAS_REQ; |
| 2546 | |
| 2547 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2548 | starget->channel + 'A', ROLE_INITIATOR); |
James Bottomley | fad01ef | 2005-05-08 16:00:15 -0500 | [diff] [blame] | 2549 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2550 | ahc_lock(ahc, &flags); |
James Bottomley | 597487b | 2005-06-03 09:49:01 -0500 | [diff] [blame] | 2551 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2552 | ppr_options, AHC_TRANS_GOAL, FALSE); |
| 2553 | ahc_unlock(ahc, &flags); |
| 2554 | } |
| 2555 | |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2556 | static void ahc_linux_set_iu(struct scsi_target *starget, int iu) |
| 2557 | { |
| 2558 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 2559 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 2560 | struct ahc_tmode_tstate *tstate; |
| 2561 | struct ahc_initiator_tinfo *tinfo |
| 2562 | = ahc_fetch_transinfo(ahc, |
| 2563 | starget->channel + 'A', |
| 2564 | shost->this_id, starget->id, &tstate); |
| 2565 | struct ahc_devinfo devinfo; |
James Bottomley | 597487b | 2005-06-03 09:49:01 -0500 | [diff] [blame] | 2566 | unsigned int ppr_options = tinfo->goal.ppr_options |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2567 | & ~MSG_EXT_PPR_IU_REQ; |
James Bottomley | 597487b | 2005-06-03 09:49:01 -0500 | [diff] [blame] | 2568 | unsigned int period = tinfo->goal.period; |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2569 | unsigned long flags; |
| 2570 | struct ahc_syncrate *syncrate; |
| 2571 | |
| 2572 | if (iu) |
| 2573 | ppr_options |= MSG_EXT_PPR_IU_REQ; |
| 2574 | |
| 2575 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 2576 | starget->channel + 'A', ROLE_INITIATOR); |
James Bottomley | fad01ef | 2005-05-08 16:00:15 -0500 | [diff] [blame] | 2577 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2578 | ahc_lock(ahc, &flags); |
James Bottomley | 597487b | 2005-06-03 09:49:01 -0500 | [diff] [blame] | 2579 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2580 | ppr_options, AHC_TRANS_GOAL, FALSE); |
| 2581 | ahc_unlock(ahc, &flags); |
| 2582 | } |
James Bottomley | ace4e71 | 2005-07-02 14:46:14 -0500 | [diff] [blame] | 2583 | #endif |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2584 | |
| 2585 | static struct spi_function_template ahc_linux_transport_functions = { |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2586 | .set_offset = ahc_linux_set_offset, |
| 2587 | .show_offset = 1, |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2588 | .set_period = ahc_linux_set_period, |
| 2589 | .show_period = 1, |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2590 | .set_width = ahc_linux_set_width, |
| 2591 | .show_width = 1, |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2592 | .set_dt = ahc_linux_set_dt, |
| 2593 | .show_dt = 1, |
James Bottomley | ace4e71 | 2005-07-02 14:46:14 -0500 | [diff] [blame] | 2594 | #if 0 |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2595 | .set_iu = ahc_linux_set_iu, |
| 2596 | .show_iu = 1, |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2597 | .set_qas = ahc_linux_set_qas, |
| 2598 | .show_qas = 1, |
James Bottomley | ace4e71 | 2005-07-02 14:46:14 -0500 | [diff] [blame] | 2599 | #endif |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2600 | }; |
| 2601 | |
| 2602 | |
| 2603 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2604 | static int __init |
| 2605 | ahc_linux_init(void) |
| 2606 | { |
Christoph Hellwig | dfd287f | 2005-06-28 16:49:44 +0200 | [diff] [blame] | 2607 | /* |
| 2608 | * If we've been passed any parameters, process them now. |
| 2609 | */ |
| 2610 | if (aic7xxx) |
| 2611 | aic7xxx_setup(aic7xxx); |
| 2612 | |
| 2613 | ahc_linux_transport_template = |
| 2614 | spi_attach_transport(&ahc_linux_transport_functions); |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2615 | if (!ahc_linux_transport_template) |
| 2616 | return -ENODEV; |
Christoph Hellwig | dfd287f | 2005-06-28 16:49:44 +0200 | [diff] [blame] | 2617 | |
James Bottomley | b1abb4d | 2005-05-24 17:15:43 -0500 | [diff] [blame] | 2618 | scsi_transport_reserve_target(ahc_linux_transport_template, |
| 2619 | sizeof(struct ahc_linux_target)); |
| 2620 | scsi_transport_reserve_device(ahc_linux_transport_template, |
| 2621 | sizeof(struct ahc_linux_device)); |
Christoph Hellwig | dfd287f | 2005-06-28 16:49:44 +0200 | [diff] [blame] | 2622 | |
Christoph Hellwig | dfd287f | 2005-06-28 16:49:44 +0200 | [diff] [blame] | 2623 | ahc_linux_pci_init(); |
| 2624 | ahc_linux_eisa_init(); |
| 2625 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2626 | } |
| 2627 | |
| 2628 | static void |
| 2629 | ahc_linux_exit(void) |
| 2630 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2631 | ahc_linux_pci_exit(); |
| 2632 | ahc_linux_eisa_exit(); |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 2633 | spi_release_transport(ahc_linux_transport_template); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2634 | } |
| 2635 | |
| 2636 | module_init(ahc_linux_init); |
| 2637 | module_exit(ahc_linux_exit); |