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 | #include <scsi/scsi_transport.h> |
| 126 | #include <scsi/scsi_transport_spi.h> |
| 127 | |
| 128 | static struct scsi_transport_template *ahc_linux_transport_template = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
| 130 | /* |
| 131 | * Include aiclib.c as part of our |
| 132 | * "module dependencies are hard" work around. |
| 133 | */ |
| 134 | #include "aiclib.c" |
| 135 | |
| 136 | #include <linux/init.h> /* __setup */ |
| 137 | |
| 138 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) |
| 139 | #include "sd.h" /* For geometry detection */ |
| 140 | #endif |
| 141 | |
| 142 | #include <linux/mm.h> /* For fetching system memory size */ |
| 143 | #include <linux/blkdev.h> /* For block_size() */ |
| 144 | #include <linux/delay.h> /* For ssleep/msleep */ |
| 145 | |
| 146 | /* |
| 147 | * Lock protecting manipulation of the ahc softc list. |
| 148 | */ |
| 149 | spinlock_t ahc_list_spinlock; |
| 150 | |
| 151 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) |
| 152 | /* For dynamic sglist size calculation. */ |
| 153 | u_int ahc_linux_nseg; |
| 154 | #endif |
| 155 | |
| 156 | /* |
| 157 | * Set this to the delay in seconds after SCSI bus reset. |
| 158 | * Note, we honor this only for the initial bus reset. |
| 159 | * The scsi error recovery code performs its own bus settle |
| 160 | * delay handling for error recovery actions. |
| 161 | */ |
| 162 | #ifdef CONFIG_AIC7XXX_RESET_DELAY_MS |
| 163 | #define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS |
| 164 | #else |
| 165 | #define AIC7XXX_RESET_DELAY 5000 |
| 166 | #endif |
| 167 | |
| 168 | /* |
| 169 | * Control collection of SCSI transfer statistics for the /proc filesystem. |
| 170 | * |
| 171 | * NOTE: Do NOT enable this when running on kernels version 1.2.x and below. |
| 172 | * NOTE: This does affect performance since it has to maintain statistics. |
| 173 | */ |
| 174 | #ifdef CONFIG_AIC7XXX_PROC_STATS |
| 175 | #define AIC7XXX_PROC_STATS |
| 176 | #endif |
| 177 | |
| 178 | /* |
| 179 | * To change the default number of tagged transactions allowed per-device, |
| 180 | * add a line to the lilo.conf file like: |
| 181 | * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" |
| 182 | * which will result in the first four devices on the first two |
| 183 | * controllers being set to a tagged queue depth of 32. |
| 184 | * |
| 185 | * The tag_commands is an array of 16 to allow for wide and twin adapters. |
| 186 | * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 |
| 187 | * for channel 1. |
| 188 | */ |
| 189 | typedef struct { |
| 190 | uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ |
| 191 | } adapter_tag_info_t; |
| 192 | |
| 193 | /* |
| 194 | * Modify this as you see fit for your system. |
| 195 | * |
| 196 | * 0 tagged queuing disabled |
| 197 | * 1 <= n <= 253 n == max tags ever dispatched. |
| 198 | * |
| 199 | * The driver will throttle the number of commands dispatched to a |
| 200 | * device if it returns queue full. For devices with a fixed maximum |
| 201 | * queue depth, the driver will eventually determine this depth and |
| 202 | * lock it in (a console message is printed to indicate that a lock |
| 203 | * has occurred). On some devices, queue full is returned for a temporary |
| 204 | * resource shortage. These devices will return queue full at varying |
| 205 | * depths. The driver will throttle back when the queue fulls occur and |
| 206 | * attempt to slowly increase the depth over time as the device recovers |
| 207 | * from the resource shortage. |
| 208 | * |
| 209 | * In this example, the first line will disable tagged queueing for all |
| 210 | * the devices on the first probed aic7xxx adapter. |
| 211 | * |
| 212 | * The second line enables tagged queueing with 4 commands/LUN for IDs |
| 213 | * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the |
| 214 | * driver to attempt to use up to 64 tags for ID 1. |
| 215 | * |
| 216 | * The third line is the same as the first line. |
| 217 | * |
| 218 | * The fourth line disables tagged queueing for devices 0 and 3. It |
| 219 | * enables tagged queueing for the other IDs, with 16 commands/LUN |
| 220 | * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for |
| 221 | * IDs 2, 5-7, and 9-15. |
| 222 | */ |
| 223 | |
| 224 | /* |
| 225 | * NOTE: The below structure is for reference only, the actual structure |
| 226 | * to modify in order to change things is just below this comment block. |
| 227 | adapter_tag_info_t aic7xxx_tag_info[] = |
| 228 | { |
| 229 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, |
| 230 | {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, |
| 231 | {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, |
| 232 | {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} |
| 233 | }; |
| 234 | */ |
| 235 | |
| 236 | #ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE |
| 237 | #define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE |
| 238 | #else |
| 239 | #define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE |
| 240 | #endif |
| 241 | |
| 242 | #define AIC7XXX_CONFIGED_TAG_COMMANDS { \ |
| 243 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ |
| 244 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ |
| 245 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ |
| 246 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ |
| 247 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ |
| 248 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ |
| 249 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ |
| 250 | AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \ |
| 251 | } |
| 252 | |
| 253 | /* |
| 254 | * By default, use the number of commands specified by |
| 255 | * the users kernel configuration. |
| 256 | */ |
| 257 | static adapter_tag_info_t aic7xxx_tag_info[] = |
| 258 | { |
| 259 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 260 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 261 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 262 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 263 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 264 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 265 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 266 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 267 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 268 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 269 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 270 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 271 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 272 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 273 | {AIC7XXX_CONFIGED_TAG_COMMANDS}, |
| 274 | {AIC7XXX_CONFIGED_TAG_COMMANDS} |
| 275 | }; |
| 276 | |
| 277 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | * There should be a specific return value for this in scsi.h, but |
| 279 | * it seems that most drivers ignore it. |
| 280 | */ |
| 281 | #define DID_UNDERFLOW DID_ERROR |
| 282 | |
| 283 | void |
| 284 | ahc_print_path(struct ahc_softc *ahc, struct scb *scb) |
| 285 | { |
| 286 | printk("(scsi%d:%c:%d:%d): ", |
| 287 | ahc->platform_data->host->host_no, |
| 288 | scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', |
| 289 | scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, |
| 290 | scb != NULL ? SCB_GET_LUN(scb) : -1); |
| 291 | } |
| 292 | |
| 293 | /* |
| 294 | * XXX - these options apply unilaterally to _all_ 274x/284x/294x |
| 295 | * cards in the system. This should be fixed. Exceptions to this |
| 296 | * rule are noted in the comments. |
| 297 | */ |
| 298 | |
| 299 | /* |
| 300 | * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This |
| 301 | * has no effect on any later resets that might occur due to things like |
| 302 | * SCSI bus timeouts. |
| 303 | */ |
| 304 | static uint32_t aic7xxx_no_reset; |
| 305 | |
| 306 | /* |
| 307 | * Certain PCI motherboards will scan PCI devices from highest to lowest, |
| 308 | * others scan from lowest to highest, and they tend to do all kinds of |
| 309 | * strange things when they come into contact with PCI bridge chips. The |
| 310 | * net result of all this is that the PCI card that is actually used to boot |
| 311 | * the machine is very hard to detect. Most motherboards go from lowest |
| 312 | * PCI slot number to highest, and the first SCSI controller found is the |
| 313 | * one you boot from. The only exceptions to this are when a controller |
| 314 | * has its BIOS disabled. So, we by default sort all of our SCSI controllers |
| 315 | * from lowest PCI slot number to highest PCI slot number. We also force |
| 316 | * all controllers with their BIOS disabled to the end of the list. This |
| 317 | * works on *almost* all computers. Where it doesn't work, we have this |
| 318 | * option. Setting this option to non-0 will reverse the order of the sort |
| 319 | * to highest first, then lowest, but will still leave cards with their BIOS |
| 320 | * disabled at the very end. That should fix everyone up unless there are |
| 321 | * really strange cirumstances. |
| 322 | */ |
| 323 | static uint32_t aic7xxx_reverse_scan; |
| 324 | |
| 325 | /* |
| 326 | * Should we force EXTENDED translation on a controller. |
| 327 | * 0 == Use whatever is in the SEEPROM or default to off |
| 328 | * 1 == Use whatever is in the SEEPROM or default to on |
| 329 | */ |
| 330 | static uint32_t aic7xxx_extended; |
| 331 | |
| 332 | /* |
| 333 | * PCI bus parity checking of the Adaptec controllers. This is somewhat |
| 334 | * dubious at best. To my knowledge, this option has never actually |
| 335 | * solved a PCI parity problem, but on certain machines with broken PCI |
| 336 | * chipset configurations where stray PCI transactions with bad parity are |
| 337 | * the norm rather than the exception, the error messages can be overwelming. |
| 338 | * It's included in the driver for completeness. |
| 339 | * 0 = Shut off PCI parity check |
| 340 | * non-0 = reverse polarity pci parity checking |
| 341 | */ |
| 342 | static uint32_t aic7xxx_pci_parity = ~0; |
| 343 | |
| 344 | /* |
| 345 | * Certain newer motherboards have put new PCI based devices into the |
| 346 | * IO spaces that used to typically be occupied by VLB or EISA cards. |
| 347 | * This overlap can cause these newer motherboards to lock up when scanned |
| 348 | * for older EISA and VLB devices. Setting this option to non-0 will |
| 349 | * cause the driver to skip scanning for any VLB or EISA controllers and |
| 350 | * only support the PCI controllers. NOTE: this means that if the kernel |
| 351 | * os compiled with PCI support disabled, then setting this to non-0 |
| 352 | * would result in never finding any devices :) |
| 353 | */ |
| 354 | #ifndef CONFIG_AIC7XXX_PROBE_EISA_VL |
| 355 | uint32_t aic7xxx_probe_eisa_vl; |
| 356 | #else |
| 357 | uint32_t aic7xxx_probe_eisa_vl = ~0; |
| 358 | #endif |
| 359 | |
| 360 | /* |
| 361 | * There are lots of broken chipsets in the world. Some of them will |
| 362 | * violate the PCI spec when we issue byte sized memory writes to our |
| 363 | * controller. I/O mapped register access, if allowed by the given |
| 364 | * platform, will work in almost all cases. |
| 365 | */ |
| 366 | uint32_t aic7xxx_allow_memio = ~0; |
| 367 | |
| 368 | /* |
| 369 | * aic7xxx_detect() has been run, so register all device arrivals |
| 370 | * immediately with the system rather than deferring to the sorted |
| 371 | * attachment performed by aic7xxx_detect(). |
| 372 | */ |
| 373 | int aic7xxx_detect_complete; |
| 374 | |
| 375 | /* |
| 376 | * So that we can set how long each device is given as a selection timeout. |
| 377 | * The table of values goes like this: |
| 378 | * 0 - 256ms |
| 379 | * 1 - 128ms |
| 380 | * 2 - 64ms |
| 381 | * 3 - 32ms |
| 382 | * We default to 256ms because some older devices need a longer time |
| 383 | * to respond to initial selection. |
| 384 | */ |
| 385 | static uint32_t aic7xxx_seltime; |
| 386 | |
| 387 | /* |
| 388 | * Certain devices do not perform any aging on commands. Should the |
| 389 | * device be saturated by commands in one portion of the disk, it is |
| 390 | * possible for transactions on far away sectors to never be serviced. |
| 391 | * To handle these devices, we can periodically send an ordered tag to |
| 392 | * force all outstanding transactions to be serviced prior to a new |
| 393 | * transaction. |
| 394 | */ |
| 395 | uint32_t aic7xxx_periodic_otag; |
| 396 | |
| 397 | /* |
| 398 | * Module information and settable options. |
| 399 | */ |
| 400 | static char *aic7xxx = NULL; |
| 401 | |
| 402 | MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>"); |
| 403 | MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver"); |
| 404 | MODULE_LICENSE("Dual BSD/GPL"); |
| 405 | MODULE_VERSION(AIC7XXX_DRIVER_VERSION); |
| 406 | module_param(aic7xxx, charp, 0444); |
| 407 | MODULE_PARM_DESC(aic7xxx, |
| 408 | "period delimited, options string.\n" |
| 409 | " verbose Enable verbose/diagnostic logging\n" |
| 410 | " allow_memio Allow device registers to be memory mapped\n" |
| 411 | " debug Bitmask of debug values to enable\n" |
| 412 | " no_probe Toggle EISA/VLB controller probing\n" |
| 413 | " probe_eisa_vl Toggle EISA/VLB controller probing\n" |
| 414 | " no_reset Supress initial bus resets\n" |
| 415 | " extended Enable extended geometry on all controllers\n" |
| 416 | " periodic_otag Send an ordered tagged transaction\n" |
| 417 | " periodically to prevent tag starvation.\n" |
| 418 | " This may be required by some older disk\n" |
| 419 | " drives or RAID arrays.\n" |
| 420 | " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n" |
| 421 | " tag_info:<tag_str> Set per-target tag depth\n" |
| 422 | " global_tag_depth:<int> Global tag depth for every target\n" |
| 423 | " on every bus\n" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | " seltime:<int> Selection Timeout\n" |
| 425 | " (0/256ms,1/128ms,2/64ms,3/32ms)\n" |
| 426 | "\n" |
| 427 | " Sample /etc/modprobe.conf line:\n" |
| 428 | " Toggle EISA/VLB probing\n" |
| 429 | " Set tag depth on Controller 1/Target 1 to 10 tags\n" |
| 430 | " Shorten the selection timeout to 128ms\n" |
| 431 | "\n" |
| 432 | " options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" |
| 433 | ); |
| 434 | |
| 435 | static void ahc_linux_handle_scsi_status(struct ahc_softc *, |
| 436 | struct ahc_linux_device *, |
| 437 | struct scb *); |
| 438 | static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, |
| 439 | Scsi_Cmnd *cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | static void ahc_linux_sem_timeout(u_long arg); |
| 441 | static void ahc_linux_freeze_simq(struct ahc_softc *ahc); |
| 442 | static void ahc_linux_release_simq(u_long arg); |
| 443 | static void ahc_linux_dev_timed_unfreeze(u_long arg); |
| 444 | static int ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag); |
| 445 | static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); |
| 446 | static void ahc_linux_size_nseg(void); |
| 447 | static void ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, |
| 449 | struct ahc_devinfo *devinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | static void ahc_linux_device_queue_depth(struct ahc_softc *ahc, |
| 451 | struct ahc_linux_device *dev); |
| 452 | static struct ahc_linux_target* ahc_linux_alloc_target(struct ahc_softc*, |
| 453 | u_int, u_int); |
| 454 | static void ahc_linux_free_target(struct ahc_softc*, |
| 455 | struct ahc_linux_target*); |
| 456 | static struct ahc_linux_device* ahc_linux_alloc_device(struct ahc_softc*, |
| 457 | struct ahc_linux_target*, |
| 458 | u_int); |
| 459 | static void ahc_linux_free_device(struct ahc_softc*, |
| 460 | struct ahc_linux_device*); |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame^] | 461 | static int ahc_linux_run_command(struct ahc_softc*, |
| 462 | struct ahc_linux_device *, |
| 463 | struct scsi_cmnd *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | static void ahc_linux_setup_tag_info_global(char *p); |
| 465 | static aic_option_callback_t ahc_linux_setup_tag_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | static int aic7xxx_setup(char *s); |
| 467 | static int ahc_linux_next_unit(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | static struct ahc_cmd *ahc_linux_run_complete_queue(struct ahc_softc *ahc); |
| 469 | |
| 470 | /********************************* Inlines ************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | static __inline struct ahc_linux_device* |
| 472 | ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, |
| 473 | u_int target, u_int lun, int alloc); |
| 474 | static __inline void ahc_schedule_completeq(struct ahc_softc *ahc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); |
| 476 | |
| 477 | static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, |
| 478 | struct ahc_dma_seg *sg, |
| 479 | dma_addr_t addr, bus_size_t len); |
| 480 | |
| 481 | static __inline void |
| 482 | ahc_schedule_completeq(struct ahc_softc *ahc) |
| 483 | { |
| 484 | if ((ahc->platform_data->flags & AHC_RUN_CMPLT_Q_TIMER) == 0) { |
| 485 | ahc->platform_data->flags |= AHC_RUN_CMPLT_Q_TIMER; |
| 486 | ahc->platform_data->completeq_timer.expires = jiffies; |
| 487 | add_timer(&ahc->platform_data->completeq_timer); |
| 488 | } |
| 489 | } |
| 490 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | static __inline struct ahc_linux_device* |
| 492 | ahc_linux_get_device(struct ahc_softc *ahc, u_int channel, u_int target, |
| 493 | u_int lun, int alloc) |
| 494 | { |
| 495 | struct ahc_linux_target *targ; |
| 496 | struct ahc_linux_device *dev; |
| 497 | u_int target_offset; |
| 498 | |
| 499 | target_offset = target; |
| 500 | if (channel != 0) |
| 501 | target_offset += 8; |
| 502 | targ = ahc->platform_data->targets[target_offset]; |
| 503 | if (targ == NULL) { |
| 504 | if (alloc != 0) { |
| 505 | targ = ahc_linux_alloc_target(ahc, channel, target); |
| 506 | if (targ == NULL) |
| 507 | return (NULL); |
| 508 | } else |
| 509 | return (NULL); |
| 510 | } |
| 511 | dev = targ->devices[lun]; |
| 512 | if (dev == NULL && alloc != 0) |
| 513 | dev = ahc_linux_alloc_device(ahc, targ, lun); |
| 514 | return (dev); |
| 515 | } |
| 516 | |
| 517 | #define AHC_LINUX_MAX_RETURNED_ERRORS 4 |
| 518 | static struct ahc_cmd * |
| 519 | ahc_linux_run_complete_queue(struct ahc_softc *ahc) |
| 520 | { |
| 521 | struct ahc_cmd *acmd; |
| 522 | u_long done_flags; |
| 523 | int with_errors; |
| 524 | |
| 525 | with_errors = 0; |
| 526 | ahc_done_lock(ahc, &done_flags); |
| 527 | while ((acmd = TAILQ_FIRST(&ahc->platform_data->completeq)) != NULL) { |
| 528 | Scsi_Cmnd *cmd; |
| 529 | |
| 530 | if (with_errors > AHC_LINUX_MAX_RETURNED_ERRORS) { |
| 531 | /* |
| 532 | * Linux uses stack recursion to requeue |
| 533 | * commands that need to be retried. Avoid |
| 534 | * blowing out the stack by "spoon feeding" |
| 535 | * commands that completed with error back |
| 536 | * the operating system in case they are going |
| 537 | * to be retried. "ick" |
| 538 | */ |
| 539 | ahc_schedule_completeq(ahc); |
| 540 | break; |
| 541 | } |
| 542 | TAILQ_REMOVE(&ahc->platform_data->completeq, |
| 543 | acmd, acmd_links.tqe); |
| 544 | cmd = &acmd_scsi_cmd(acmd); |
| 545 | cmd->host_scribble = NULL; |
| 546 | if (ahc_cmd_get_transaction_status(cmd) != DID_OK |
| 547 | || (cmd->result & 0xFF) != SCSI_STATUS_OK) |
| 548 | with_errors++; |
| 549 | |
| 550 | cmd->scsi_done(cmd); |
| 551 | } |
| 552 | ahc_done_unlock(ahc, &done_flags); |
| 553 | return (acmd); |
| 554 | } |
| 555 | |
| 556 | static __inline void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) |
| 558 | { |
| 559 | Scsi_Cmnd *cmd; |
| 560 | |
| 561 | cmd = scb->io_ctx; |
| 562 | ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); |
| 563 | if (cmd->use_sg != 0) { |
| 564 | struct scatterlist *sg; |
| 565 | |
| 566 | sg = (struct scatterlist *)cmd->request_buffer; |
| 567 | pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg, |
| be7db05 | 2005-04-17 15:26:13 -0500 | [diff] [blame] | 568 | cmd->sc_data_direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | } else if (cmd->request_bufflen != 0) { |
| 570 | pci_unmap_single(ahc->dev_softc, |
| 571 | scb->platform_data->buf_busaddr, |
| 572 | cmd->request_bufflen, |
| be7db05 | 2005-04-17 15:26:13 -0500 | [diff] [blame] | 573 | cmd->sc_data_direction); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | } |
| 575 | } |
| 576 | |
| 577 | static __inline int |
| 578 | ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, |
| 579 | struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) |
| 580 | { |
| 581 | int consumed; |
| 582 | |
| 583 | if ((scb->sg_count + 1) > AHC_NSEG) |
| 584 | panic("Too few segs for dma mapping. " |
| 585 | "Increase AHC_NSEG\n"); |
| 586 | |
| 587 | consumed = 1; |
| 588 | sg->addr = ahc_htole32(addr & 0xFFFFFFFF); |
| 589 | scb->platform_data->xfer_len += len; |
| 590 | |
| 591 | if (sizeof(dma_addr_t) > 4 |
| 592 | && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) |
| 593 | len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; |
| 594 | |
| 595 | sg->len = ahc_htole32(len); |
| 596 | return (consumed); |
| 597 | } |
| 598 | |
| 599 | /************************ Host template entry points *************************/ |
| 600 | static int ahc_linux_detect(Scsi_Host_Template *); |
| 601 | static int ahc_linux_queue(Scsi_Cmnd *, void (*)(Scsi_Cmnd *)); |
| 602 | static const char *ahc_linux_info(struct Scsi_Host *); |
| 603 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
| 604 | static int ahc_linux_slave_alloc(Scsi_Device *); |
| 605 | static int ahc_linux_slave_configure(Scsi_Device *); |
| 606 | static void ahc_linux_slave_destroy(Scsi_Device *); |
| 607 | #if defined(__i386__) |
| 608 | static int ahc_linux_biosparam(struct scsi_device*, |
| 609 | struct block_device*, |
| 610 | sector_t, int[]); |
| 611 | #endif |
| 612 | #else |
| 613 | static int ahc_linux_release(struct Scsi_Host *); |
| 614 | static void ahc_linux_select_queue_depth(struct Scsi_Host *host, |
| 615 | Scsi_Device *scsi_devs); |
| 616 | #if defined(__i386__) |
| 617 | static int ahc_linux_biosparam(Disk *, kdev_t, int[]); |
| 618 | #endif |
| 619 | #endif |
| 620 | static int ahc_linux_bus_reset(Scsi_Cmnd *); |
| 621 | static int ahc_linux_dev_reset(Scsi_Cmnd *); |
| 622 | static int ahc_linux_abort(Scsi_Cmnd *); |
| 623 | |
| 624 | /* |
| 625 | * Calculate a safe value for AHC_NSEG (as expressed through ahc_linux_nseg). |
| 626 | * |
| 627 | * In pre-2.5.X... |
| 628 | * The midlayer allocates an S/G array dynamically when a command is issued |
| 629 | * using SCSI malloc. This array, which is in an OS dependent format that |
| 630 | * must later be copied to our private S/G list, is sized to house just the |
| 631 | * number of segments needed for the current transfer. Since the code that |
| 632 | * sizes the SCSI malloc pool does not take into consideration fragmentation |
| 633 | * of the pool, executing transactions numbering just a fraction of our |
| 634 | * concurrent transaction limit with list lengths aproaching AHC_NSEG will |
| 635 | * quickly depleat the SCSI malloc pool of usable space. Unfortunately, the |
| 636 | * mid-layer does not properly handle this scsi malloc failures for the S/G |
| 637 | * array and the result can be a lockup of the I/O subsystem. We try to size |
| 638 | * our S/G list so that it satisfies our drivers allocation requirements in |
| 639 | * addition to avoiding fragmentation of the SCSI malloc pool. |
| 640 | */ |
| 641 | static void |
| 642 | ahc_linux_size_nseg(void) |
| 643 | { |
| 644 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) |
| 645 | u_int cur_size; |
| 646 | u_int best_size; |
| 647 | |
| 648 | /* |
| 649 | * The SCSI allocator rounds to the nearest 512 bytes |
| 650 | * an cannot allocate across a page boundary. Our algorithm |
| 651 | * is to start at 1K of scsi malloc space per-command and |
| 652 | * loop through all factors of the PAGE_SIZE and pick the best. |
| 653 | */ |
| 654 | best_size = 0; |
| 655 | for (cur_size = 1024; cur_size <= PAGE_SIZE; cur_size *= 2) { |
| 656 | u_int nseg; |
| 657 | |
| 658 | nseg = cur_size / sizeof(struct scatterlist); |
| 659 | if (nseg < AHC_LINUX_MIN_NSEG) |
| 660 | continue; |
| 661 | |
| 662 | if (best_size == 0) { |
| 663 | best_size = cur_size; |
| 664 | ahc_linux_nseg = nseg; |
| 665 | } else { |
| 666 | u_int best_rem; |
| 667 | u_int cur_rem; |
| 668 | |
| 669 | /* |
| 670 | * Compare the traits of the current "best_size" |
| 671 | * with the current size to determine if the |
| 672 | * current size is a better size. |
| 673 | */ |
| 674 | best_rem = best_size % sizeof(struct scatterlist); |
| 675 | cur_rem = cur_size % sizeof(struct scatterlist); |
| 676 | if (cur_rem < best_rem) { |
| 677 | best_size = cur_size; |
| 678 | ahc_linux_nseg = nseg; |
| 679 | } |
| 680 | } |
| 681 | } |
| 682 | #endif |
| 683 | } |
| 684 | |
| 685 | /* |
| 686 | * Try to detect an Adaptec 7XXX controller. |
| 687 | */ |
| 688 | static int |
| 689 | ahc_linux_detect(Scsi_Host_Template *template) |
| 690 | { |
| 691 | struct ahc_softc *ahc; |
| 692 | int found = 0; |
| 693 | |
| 694 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) |
| 695 | /* |
| 696 | * It is a bug that the upper layer takes |
| 697 | * this lock just prior to calling us. |
| 698 | */ |
| 699 | spin_unlock_irq(&io_request_lock); |
| 700 | #endif |
| 701 | |
| 702 | /* |
| 703 | * Sanity checking of Linux SCSI data structures so |
| 704 | * that some of our hacks^H^H^H^H^Hassumptions aren't |
| 705 | * violated. |
| 706 | */ |
| 707 | if (offsetof(struct ahc_cmd_internal, end) |
| 708 | > offsetof(struct scsi_cmnd, host_scribble)) { |
| 709 | printf("ahc_linux_detect: SCSI data structures changed.\n"); |
| 710 | printf("ahc_linux_detect: Unable to attach\n"); |
| 711 | return (0); |
| 712 | } |
| 713 | ahc_linux_size_nseg(); |
| 714 | /* |
| 715 | * If we've been passed any parameters, process them now. |
| 716 | */ |
| 717 | if (aic7xxx) |
| 718 | aic7xxx_setup(aic7xxx); |
| 719 | |
| 720 | template->proc_name = "aic7xxx"; |
| 721 | |
| 722 | /* |
| 723 | * Initialize our softc list lock prior to |
| 724 | * probing for any adapters. |
| 725 | */ |
| 726 | ahc_list_lockinit(); |
| 727 | |
| 728 | found = ahc_linux_pci_init(); |
| 729 | if (!ahc_linux_eisa_init()) |
| 730 | found++; |
| 731 | |
| 732 | /* |
| 733 | * Register with the SCSI layer all |
| 734 | * controllers we've found. |
| 735 | */ |
| 736 | TAILQ_FOREACH(ahc, &ahc_tailq, links) { |
| 737 | |
| 738 | if (ahc_linux_register_host(ahc, template) == 0) |
| 739 | found++; |
| 740 | } |
| 741 | |
| 742 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) |
| 743 | spin_lock_irq(&io_request_lock); |
| 744 | #endif |
| 745 | aic7xxx_detect_complete++; |
| 746 | |
| 747 | return (found); |
| 748 | } |
| 749 | |
| 750 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) |
| 751 | /* |
| 752 | * Free the passed in Scsi_Host memory structures prior to unloading the |
| 753 | * module. |
| 754 | */ |
| 755 | int |
| 756 | ahc_linux_release(struct Scsi_Host * host) |
| 757 | { |
| 758 | struct ahc_softc *ahc; |
| 759 | u_long l; |
| 760 | |
| 761 | ahc_list_lock(&l); |
| 762 | if (host != NULL) { |
| 763 | |
| 764 | /* |
| 765 | * We should be able to just perform |
| 766 | * the free directly, but check our |
| 767 | * list for extra sanity. |
| 768 | */ |
| 769 | ahc = ahc_find_softc(*(struct ahc_softc **)host->hostdata); |
| 770 | if (ahc != NULL) { |
| 771 | u_long s; |
| 772 | |
| 773 | ahc_lock(ahc, &s); |
| 774 | ahc_intr_enable(ahc, FALSE); |
| 775 | ahc_unlock(ahc, &s); |
| 776 | ahc_free(ahc); |
| 777 | } |
| 778 | } |
| 779 | ahc_list_unlock(&l); |
| 780 | return (0); |
| 781 | } |
| 782 | #endif |
| 783 | |
| 784 | /* |
| 785 | * Return a string describing the driver. |
| 786 | */ |
| 787 | static const char * |
| 788 | ahc_linux_info(struct Scsi_Host *host) |
| 789 | { |
| 790 | static char buffer[512]; |
| 791 | char ahc_info[256]; |
| 792 | char *bp; |
| 793 | struct ahc_softc *ahc; |
| 794 | |
| 795 | bp = &buffer[0]; |
| 796 | ahc = *(struct ahc_softc **)host->hostdata; |
| 797 | memset(bp, 0, sizeof(buffer)); |
| 798 | strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev "); |
| 799 | strcat(bp, AIC7XXX_DRIVER_VERSION); |
| 800 | strcat(bp, "\n"); |
| 801 | strcat(bp, " <"); |
| 802 | strcat(bp, ahc->description); |
| 803 | strcat(bp, ">\n"); |
| 804 | strcat(bp, " "); |
| 805 | ahc_controller_info(ahc, ahc_info); |
| 806 | strcat(bp, ahc_info); |
| 807 | strcat(bp, "\n"); |
| 808 | |
| 809 | return (bp); |
| 810 | } |
| 811 | |
| 812 | /* |
| 813 | * Queue an SCB to the controller. |
| 814 | */ |
| 815 | static int |
| 816 | ahc_linux_queue(Scsi_Cmnd * cmd, void (*scsi_done) (Scsi_Cmnd *)) |
| 817 | { |
| 818 | struct ahc_softc *ahc; |
| 819 | struct ahc_linux_device *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | |
| 821 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; |
| 822 | |
| 823 | /* |
| 824 | * Save the callback on completion function. |
| 825 | */ |
| 826 | cmd->scsi_done = scsi_done; |
| 827 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | /* |
| 829 | * Close the race of a command that was in the process of |
| 830 | * being queued to us just as our simq was frozen. Let |
| 831 | * DV commands through so long as we are only frozen to |
| 832 | * perform DV. |
| 833 | */ |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame^] | 834 | if (ahc->platform_data->qfrozen != 0) |
| 835 | return SCSI_MLQUEUE_HOST_BUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id, |
| 838 | cmd->device->lun, /*alloc*/TRUE); |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame^] | 839 | BUG_ON(dev == NULL); |
| 840 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | cmd->result = CAM_REQ_INPROG << 16; |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame^] | 842 | |
| 843 | return ahc_linux_run_command(ahc, dev, cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | } |
| 845 | |
| 846 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
| 847 | static int |
| 848 | ahc_linux_slave_alloc(Scsi_Device *device) |
| 849 | { |
| 850 | struct ahc_softc *ahc; |
| 851 | |
| 852 | ahc = *((struct ahc_softc **)device->host->hostdata); |
| 853 | if (bootverbose) |
| 854 | printf("%s: Slave Alloc %d\n", ahc_name(ahc), device->id); |
| 855 | return (0); |
| 856 | } |
| 857 | |
| 858 | static int |
| 859 | ahc_linux_slave_configure(Scsi_Device *device) |
| 860 | { |
| 861 | struct ahc_softc *ahc; |
| 862 | struct ahc_linux_device *dev; |
| 863 | u_long flags; |
| 864 | |
| 865 | ahc = *((struct ahc_softc **)device->host->hostdata); |
| 866 | if (bootverbose) |
| 867 | printf("%s: Slave Configure %d\n", ahc_name(ahc), device->id); |
| 868 | ahc_midlayer_entrypoint_lock(ahc, &flags); |
| 869 | /* |
| 870 | * Since Linux has attached to the device, configure |
| 871 | * it so we don't free and allocate the device |
| 872 | * structure on every command. |
| 873 | */ |
| 874 | dev = ahc_linux_get_device(ahc, device->channel, |
| 875 | device->id, device->lun, |
| 876 | /*alloc*/TRUE); |
| 877 | if (dev != NULL) { |
| 878 | dev->flags &= ~AHC_DEV_UNCONFIGURED; |
| 879 | dev->scsi_device = device; |
| 880 | ahc_linux_device_queue_depth(ahc, dev); |
| 881 | } |
| 882 | ahc_midlayer_entrypoint_unlock(ahc, &flags); |
| cb62402 | 2005-04-17 18:03:20 -0500 | [diff] [blame] | 883 | |
| 884 | /* Initial Domain Validation */ |
| 885 | if (!spi_initial_dv(device->sdev_target)) |
| 886 | spi_dv_device(device); |
| 887 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | return (0); |
| 889 | } |
| 890 | |
| 891 | static void |
| 892 | ahc_linux_slave_destroy(Scsi_Device *device) |
| 893 | { |
| 894 | struct ahc_softc *ahc; |
| 895 | struct ahc_linux_device *dev; |
| 896 | u_long flags; |
| 897 | |
| 898 | ahc = *((struct ahc_softc **)device->host->hostdata); |
| 899 | if (bootverbose) |
| 900 | printf("%s: Slave Destroy %d\n", ahc_name(ahc), device->id); |
| 901 | ahc_midlayer_entrypoint_lock(ahc, &flags); |
| 902 | dev = ahc_linux_get_device(ahc, device->channel, |
| 903 | device->id, device->lun, |
| 904 | /*alloc*/FALSE); |
| 905 | /* |
| 906 | * Filter out "silly" deletions of real devices by only |
| 907 | * deleting devices that have had slave_configure() |
| 908 | * called on them. All other devices that have not |
| 909 | * been configured will automatically be deleted by |
| 910 | * the refcounting process. |
| 911 | */ |
| 912 | if (dev != NULL |
| 913 | && (dev->flags & AHC_DEV_SLAVE_CONFIGURED) != 0) { |
| 914 | dev->flags |= AHC_DEV_UNCONFIGURED; |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame^] | 915 | if (dev->active == 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0) |
| 917 | ahc_linux_free_device(ahc, dev); |
| 918 | } |
| 919 | ahc_midlayer_entrypoint_unlock(ahc, &flags); |
| 920 | } |
| 921 | #else |
| 922 | /* |
| 923 | * Sets the queue depth for each SCSI device hanging |
| 924 | * off the input host adapter. |
| 925 | */ |
| 926 | static void |
| 927 | ahc_linux_select_queue_depth(struct Scsi_Host *host, Scsi_Device *scsi_devs) |
| 928 | { |
| 929 | Scsi_Device *device; |
| 930 | Scsi_Device *ldev; |
| 931 | struct ahc_softc *ahc; |
| 932 | u_long flags; |
| 933 | |
| 934 | ahc = *((struct ahc_softc **)host->hostdata); |
| 935 | ahc_lock(ahc, &flags); |
| 936 | for (device = scsi_devs; device != NULL; device = device->next) { |
| 937 | |
| 938 | /* |
| 939 | * Watch out for duplicate devices. This works around |
| 940 | * some quirks in how the SCSI scanning code does its |
| 941 | * device management. |
| 942 | */ |
| 943 | for (ldev = scsi_devs; ldev != device; ldev = ldev->next) { |
| 944 | if (ldev->host == device->host |
| 945 | && ldev->channel == device->channel |
| 946 | && ldev->id == device->id |
| 947 | && ldev->lun == device->lun) |
| 948 | break; |
| 949 | } |
| 950 | /* Skip duplicate. */ |
| 951 | if (ldev != device) |
| 952 | continue; |
| 953 | |
| 954 | if (device->host == host) { |
| 955 | struct ahc_linux_device *dev; |
| 956 | |
| 957 | /* |
| 958 | * Since Linux has attached to the device, configure |
| 959 | * it so we don't free and allocate the device |
| 960 | * structure on every command. |
| 961 | */ |
| 962 | dev = ahc_linux_get_device(ahc, device->channel, |
| 963 | device->id, device->lun, |
| 964 | /*alloc*/TRUE); |
| 965 | if (dev != NULL) { |
| 966 | dev->flags &= ~AHC_DEV_UNCONFIGURED; |
| 967 | dev->scsi_device = device; |
| 968 | ahc_linux_device_queue_depth(ahc, dev); |
| 969 | device->queue_depth = dev->openings |
| 970 | + dev->active; |
| 971 | if ((dev->flags & (AHC_DEV_Q_BASIC |
| 972 | | AHC_DEV_Q_TAGGED)) == 0) { |
| 973 | /* |
| 974 | * We allow the OS to queue 2 untagged |
| 975 | * transactions to us at any time even |
| 976 | * though we can only execute them |
| 977 | * serially on the controller/device. |
| 978 | * This should remove some latency. |
| 979 | */ |
| 980 | device->queue_depth = 2; |
| 981 | } |
| 982 | } |
| 983 | } |
| 984 | } |
| 985 | ahc_unlock(ahc, &flags); |
| 986 | } |
| 987 | #endif |
| 988 | |
| 989 | #if defined(__i386__) |
| 990 | /* |
| 991 | * Return the disk geometry for the given SCSI device. |
| 992 | */ |
| 993 | static int |
| 994 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
| 995 | ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, |
| 996 | sector_t capacity, int geom[]) |
| 997 | { |
| 998 | uint8_t *bh; |
| 999 | #else |
| 1000 | ahc_linux_biosparam(Disk *disk, kdev_t dev, int geom[]) |
| 1001 | { |
| 1002 | struct scsi_device *sdev = disk->device; |
| 1003 | u_long capacity = disk->capacity; |
| 1004 | struct buffer_head *bh; |
| 1005 | #endif |
| 1006 | int heads; |
| 1007 | int sectors; |
| 1008 | int cylinders; |
| 1009 | int ret; |
| 1010 | int extended; |
| 1011 | struct ahc_softc *ahc; |
| 1012 | u_int channel; |
| 1013 | |
| 1014 | ahc = *((struct ahc_softc **)sdev->host->hostdata); |
| 1015 | channel = sdev->channel; |
| 1016 | |
| 1017 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
| 1018 | bh = scsi_bios_ptable(bdev); |
| 1019 | #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,17) |
| 1020 | bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, block_size(dev)); |
| 1021 | #else |
| 1022 | bh = bread(MKDEV(MAJOR(dev), MINOR(dev) & ~0xf), 0, 1024); |
| 1023 | #endif |
| 1024 | |
| 1025 | if (bh) { |
| 1026 | ret = scsi_partsize(bh, capacity, |
| 1027 | &geom[2], &geom[0], &geom[1]); |
| 1028 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
| 1029 | kfree(bh); |
| 1030 | #else |
| 1031 | brelse(bh); |
| 1032 | #endif |
| 1033 | if (ret != -1) |
| 1034 | return (ret); |
| 1035 | } |
| 1036 | heads = 64; |
| 1037 | sectors = 32; |
| 1038 | cylinders = aic_sector_div(capacity, heads, sectors); |
| 1039 | |
| 1040 | if (aic7xxx_extended != 0) |
| 1041 | extended = 1; |
| 1042 | else if (channel == 0) |
| 1043 | extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; |
| 1044 | else |
| 1045 | extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; |
| 1046 | if (extended && cylinders >= 1024) { |
| 1047 | heads = 255; |
| 1048 | sectors = 63; |
| 1049 | cylinders = aic_sector_div(capacity, heads, sectors); |
| 1050 | } |
| 1051 | geom[0] = heads; |
| 1052 | geom[1] = sectors; |
| 1053 | geom[2] = cylinders; |
| 1054 | return (0); |
| 1055 | } |
| 1056 | #endif |
| 1057 | |
| 1058 | /* |
| 1059 | * Abort the current SCSI command(s). |
| 1060 | */ |
| 1061 | static int |
| 1062 | ahc_linux_abort(Scsi_Cmnd *cmd) |
| 1063 | { |
| 1064 | int error; |
| 1065 | |
| 1066 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); |
| 1067 | if (error != 0) |
| 1068 | printf("aic7xxx_abort returns 0x%x\n", error); |
| 1069 | return (error); |
| 1070 | } |
| 1071 | |
| 1072 | /* |
| 1073 | * Attempt to send a target reset message to the device that timed out. |
| 1074 | */ |
| 1075 | static int |
| 1076 | ahc_linux_dev_reset(Scsi_Cmnd *cmd) |
| 1077 | { |
| 1078 | int error; |
| 1079 | |
| 1080 | error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); |
| 1081 | if (error != 0) |
| 1082 | printf("aic7xxx_dev_reset returns 0x%x\n", error); |
| 1083 | return (error); |
| 1084 | } |
| 1085 | |
| 1086 | /* |
| 1087 | * Reset the SCSI bus. |
| 1088 | */ |
| 1089 | static int |
| 1090 | ahc_linux_bus_reset(Scsi_Cmnd *cmd) |
| 1091 | { |
| 1092 | struct ahc_softc *ahc; |
| 1093 | u_long s; |
| 1094 | int found; |
| 1095 | |
| 1096 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; |
| 1097 | ahc_midlayer_entrypoint_lock(ahc, &s); |
| 1098 | found = ahc_reset_channel(ahc, cmd->device->channel + 'A', |
| 1099 | /*initiate reset*/TRUE); |
| 1100 | ahc_linux_run_complete_queue(ahc); |
| 1101 | ahc_midlayer_entrypoint_unlock(ahc, &s); |
| 1102 | |
| 1103 | if (bootverbose) |
| 1104 | printf("%s: SCSI bus reset delivered. " |
| 1105 | "%d SCBs aborted.\n", ahc_name(ahc), found); |
| 1106 | |
| 1107 | return SUCCESS; |
| 1108 | } |
| 1109 | |
| 1110 | Scsi_Host_Template aic7xxx_driver_template = { |
| 1111 | .module = THIS_MODULE, |
| 1112 | .name = "aic7xxx", |
| 1113 | .proc_info = ahc_linux_proc_info, |
| 1114 | .info = ahc_linux_info, |
| 1115 | .queuecommand = ahc_linux_queue, |
| 1116 | .eh_abort_handler = ahc_linux_abort, |
| 1117 | .eh_device_reset_handler = ahc_linux_dev_reset, |
| 1118 | .eh_bus_reset_handler = ahc_linux_bus_reset, |
| 1119 | #if defined(__i386__) |
| 1120 | .bios_param = ahc_linux_biosparam, |
| 1121 | #endif |
| 1122 | .can_queue = AHC_MAX_QUEUE, |
| 1123 | .this_id = -1, |
| 1124 | .cmd_per_lun = 2, |
| 1125 | .use_clustering = ENABLE_CLUSTERING, |
| 1126 | .slave_alloc = ahc_linux_slave_alloc, |
| 1127 | .slave_configure = ahc_linux_slave_configure, |
| 1128 | .slave_destroy = ahc_linux_slave_destroy, |
| 1129 | }; |
| 1130 | |
| 1131 | /**************************** Tasklet Handler *********************************/ |
| 1132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | /******************************** Macros **************************************/ |
| 1134 | #define BUILD_SCSIID(ahc, cmd) \ |
| 1135 | ((((cmd)->device->id << TID_SHIFT) & TID) \ |
| 1136 | | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ |
| 1137 | | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) |
| 1138 | |
| 1139 | /******************************** Bus DMA *************************************/ |
| 1140 | int |
| 1141 | ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, |
| 1142 | bus_size_t alignment, bus_size_t boundary, |
| 1143 | dma_addr_t lowaddr, dma_addr_t highaddr, |
| 1144 | bus_dma_filter_t *filter, void *filterarg, |
| 1145 | bus_size_t maxsize, int nsegments, |
| 1146 | bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) |
| 1147 | { |
| 1148 | bus_dma_tag_t dmat; |
| 1149 | |
| 1150 | dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); |
| 1151 | if (dmat == NULL) |
| 1152 | return (ENOMEM); |
| 1153 | |
| 1154 | /* |
| 1155 | * Linux is very simplistic about DMA memory. For now don't |
| 1156 | * maintain all specification information. Once Linux supplies |
| 1157 | * better facilities for doing these operations, or the |
| 1158 | * needs of this particular driver change, we might need to do |
| 1159 | * more here. |
| 1160 | */ |
| 1161 | dmat->alignment = alignment; |
| 1162 | dmat->boundary = boundary; |
| 1163 | dmat->maxsize = maxsize; |
| 1164 | *ret_tag = dmat; |
| 1165 | return (0); |
| 1166 | } |
| 1167 | |
| 1168 | void |
| 1169 | ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) |
| 1170 | { |
| 1171 | free(dmat, M_DEVBUF); |
| 1172 | } |
| 1173 | |
| 1174 | int |
| 1175 | ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, |
| 1176 | int flags, bus_dmamap_t *mapp) |
| 1177 | { |
| 1178 | bus_dmamap_t map; |
| 1179 | |
| 1180 | map = malloc(sizeof(*map), M_DEVBUF, M_NOWAIT); |
| 1181 | if (map == NULL) |
| 1182 | return (ENOMEM); |
| 1183 | /* |
| 1184 | * Although we can dma data above 4GB, our |
| 1185 | * "consistent" memory is below 4GB for |
| 1186 | * space efficiency reasons (only need a 4byte |
| 1187 | * address). For this reason, we have to reset |
| 1188 | * our dma mask when doing allocations. |
| 1189 | */ |
| 1190 | if (ahc->dev_softc != NULL) |
| 1191 | if (pci_set_dma_mask(ahc->dev_softc, 0xFFFFFFFF)) { |
| 1192 | printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n"); |
| 1193 | kfree(map); |
| 1194 | return (ENODEV); |
| 1195 | } |
| 1196 | *vaddr = pci_alloc_consistent(ahc->dev_softc, |
| 1197 | dmat->maxsize, &map->bus_addr); |
| 1198 | if (ahc->dev_softc != NULL) |
| 1199 | if (pci_set_dma_mask(ahc->dev_softc, |
| 1200 | ahc->platform_data->hw_dma_mask)) { |
| 1201 | printk(KERN_WARNING "aic7xxx: No suitable DMA available.\n"); |
| 1202 | kfree(map); |
| 1203 | return (ENODEV); |
| 1204 | } |
| 1205 | if (*vaddr == NULL) |
| 1206 | return (ENOMEM); |
| 1207 | *mapp = map; |
| 1208 | return(0); |
| 1209 | } |
| 1210 | |
| 1211 | void |
| 1212 | ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, |
| 1213 | void* vaddr, bus_dmamap_t map) |
| 1214 | { |
| 1215 | pci_free_consistent(ahc->dev_softc, dmat->maxsize, |
| 1216 | vaddr, map->bus_addr); |
| 1217 | } |
| 1218 | |
| 1219 | int |
| 1220 | ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, |
| 1221 | void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, |
| 1222 | void *cb_arg, int flags) |
| 1223 | { |
| 1224 | /* |
| 1225 | * Assume for now that this will only be used during |
| 1226 | * initialization and not for per-transaction buffer mapping. |
| 1227 | */ |
| 1228 | bus_dma_segment_t stack_sg; |
| 1229 | |
| 1230 | stack_sg.ds_addr = map->bus_addr; |
| 1231 | stack_sg.ds_len = dmat->maxsize; |
| 1232 | cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); |
| 1233 | return (0); |
| 1234 | } |
| 1235 | |
| 1236 | void |
| 1237 | ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) |
| 1238 | { |
| 1239 | /* |
| 1240 | * The map may is NULL in our < 2.3.X implementation. |
| 1241 | * Now it's 2.6.5, but just in case... |
| 1242 | */ |
| 1243 | BUG_ON(map == NULL); |
| 1244 | free(map, M_DEVBUF); |
| 1245 | } |
| 1246 | |
| 1247 | int |
| 1248 | ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) |
| 1249 | { |
| 1250 | /* Nothing to do */ |
| 1251 | return (0); |
| 1252 | } |
| 1253 | |
| 1254 | /********************* Platform Dependent Functions ***************************/ |
| 1255 | /* |
| 1256 | * Compare "left hand" softc with "right hand" softc, returning: |
| 1257 | * < 0 - lahc has a lower priority than rahc |
| 1258 | * 0 - Softcs are equal |
| 1259 | * > 0 - lahc has a higher priority than rahc |
| 1260 | */ |
| 1261 | int |
| 1262 | ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc) |
| 1263 | { |
| 1264 | int value; |
| 1265 | int rvalue; |
| 1266 | int lvalue; |
| 1267 | |
| 1268 | /* |
| 1269 | * Under Linux, cards are ordered as follows: |
| 1270 | * 1) VLB/EISA BIOS enabled devices sorted by BIOS address. |
| 1271 | * 2) PCI devices with BIOS enabled sorted by bus/slot/func. |
| 1272 | * 3) All remaining VLB/EISA devices sorted by ioport. |
| 1273 | * 4) All remaining PCI devices sorted by bus/slot/func. |
| 1274 | */ |
| 1275 | value = (lahc->flags & AHC_BIOS_ENABLED) |
| 1276 | - (rahc->flags & AHC_BIOS_ENABLED); |
| 1277 | if (value != 0) |
| 1278 | /* Controllers with BIOS enabled have a *higher* priority */ |
| 1279 | return (value); |
| 1280 | |
| 1281 | /* |
| 1282 | * Same BIOS setting, now sort based on bus type. |
| 1283 | * EISA and VL controllers sort together. EISA/VL |
| 1284 | * have higher priority than PCI. |
| 1285 | */ |
| 1286 | rvalue = (rahc->chip & AHC_BUS_MASK); |
| 1287 | if (rvalue == AHC_VL) |
| 1288 | rvalue = AHC_EISA; |
| 1289 | lvalue = (lahc->chip & AHC_BUS_MASK); |
| 1290 | if (lvalue == AHC_VL) |
| 1291 | lvalue = AHC_EISA; |
| 1292 | value = rvalue - lvalue; |
| 1293 | if (value != 0) |
| 1294 | return (value); |
| 1295 | |
| 1296 | /* Still equal. Sort by BIOS address, ioport, or bus/slot/func. */ |
| 1297 | switch (rvalue) { |
| 1298 | #ifdef CONFIG_PCI |
| 1299 | case AHC_PCI: |
| 1300 | { |
| 1301 | char primary_channel; |
| 1302 | |
| 1303 | if (aic7xxx_reverse_scan != 0) |
| 1304 | value = ahc_get_pci_bus(lahc->dev_softc) |
| 1305 | - ahc_get_pci_bus(rahc->dev_softc); |
| 1306 | else |
| 1307 | value = ahc_get_pci_bus(rahc->dev_softc) |
| 1308 | - ahc_get_pci_bus(lahc->dev_softc); |
| 1309 | if (value != 0) |
| 1310 | break; |
| 1311 | if (aic7xxx_reverse_scan != 0) |
| 1312 | value = ahc_get_pci_slot(lahc->dev_softc) |
| 1313 | - ahc_get_pci_slot(rahc->dev_softc); |
| 1314 | else |
| 1315 | value = ahc_get_pci_slot(rahc->dev_softc) |
| 1316 | - ahc_get_pci_slot(lahc->dev_softc); |
| 1317 | if (value != 0) |
| 1318 | break; |
| 1319 | /* |
| 1320 | * On multi-function devices, the user can choose |
| 1321 | * to have function 1 probed before function 0. |
| 1322 | * Give whichever channel is the primary channel |
| 1323 | * the highest priority. |
| 1324 | */ |
| 1325 | primary_channel = (lahc->flags & AHC_PRIMARY_CHANNEL) + 'A'; |
| 1326 | value = -1; |
| 1327 | if (lahc->channel == primary_channel) |
| 1328 | value = 1; |
| 1329 | break; |
| 1330 | } |
| 1331 | #endif |
| 1332 | case AHC_EISA: |
| 1333 | if ((rahc->flags & AHC_BIOS_ENABLED) != 0) { |
| 1334 | value = rahc->platform_data->bios_address |
| 1335 | - lahc->platform_data->bios_address; |
| 1336 | } else { |
| 1337 | value = rahc->bsh.ioport |
| 1338 | - lahc->bsh.ioport; |
| 1339 | } |
| 1340 | break; |
| 1341 | default: |
| 1342 | panic("ahc_softc_sort: invalid bus type"); |
| 1343 | } |
| 1344 | return (value); |
| 1345 | } |
| 1346 | |
| 1347 | static void |
| 1348 | ahc_linux_setup_tag_info_global(char *p) |
| 1349 | { |
| 1350 | int tags, i, j; |
| 1351 | |
| 1352 | tags = simple_strtoul(p + 1, NULL, 0) & 0xff; |
| 1353 | printf("Setting Global Tags= %d\n", tags); |
| 1354 | |
| 1355 | for (i = 0; i < NUM_ELEMENTS(aic7xxx_tag_info); i++) { |
| 1356 | for (j = 0; j < AHC_NUM_TARGETS; j++) { |
| 1357 | aic7xxx_tag_info[i].tag_commands[j] = tags; |
| 1358 | } |
| 1359 | } |
| 1360 | } |
| 1361 | |
| 1362 | static void |
| 1363 | ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) |
| 1364 | { |
| 1365 | |
| 1366 | if ((instance >= 0) && (targ >= 0) |
| 1367 | && (instance < NUM_ELEMENTS(aic7xxx_tag_info)) |
| 1368 | && (targ < AHC_NUM_TARGETS)) { |
| 1369 | aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; |
| 1370 | if (bootverbose) |
| 1371 | printf("tag_info[%d:%d] = %d\n", instance, targ, value); |
| 1372 | } |
| 1373 | } |
| 1374 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | /* |
| 1376 | * Handle Linux boot parameters. This routine allows for assigning a value |
| 1377 | * to a parameter with a ':' between the parameter and the value. |
| 1378 | * ie. aic7xxx=stpwlev:1,extended |
| 1379 | */ |
| 1380 | static int |
| 1381 | aic7xxx_setup(char *s) |
| 1382 | { |
| 1383 | int i, n; |
| 1384 | char *p; |
| 1385 | char *end; |
| 1386 | |
| 1387 | static struct { |
| 1388 | const char *name; |
| 1389 | uint32_t *flag; |
| 1390 | } options[] = { |
| 1391 | { "extended", &aic7xxx_extended }, |
| 1392 | { "no_reset", &aic7xxx_no_reset }, |
| 1393 | { "verbose", &aic7xxx_verbose }, |
| 1394 | { "allow_memio", &aic7xxx_allow_memio}, |
| 1395 | #ifdef AHC_DEBUG |
| 1396 | { "debug", &ahc_debug }, |
| 1397 | #endif |
| 1398 | { "reverse_scan", &aic7xxx_reverse_scan }, |
| 1399 | { "no_probe", &aic7xxx_probe_eisa_vl }, |
| 1400 | { "probe_eisa_vl", &aic7xxx_probe_eisa_vl }, |
| 1401 | { "periodic_otag", &aic7xxx_periodic_otag }, |
| 1402 | { "pci_parity", &aic7xxx_pci_parity }, |
| 1403 | { "seltime", &aic7xxx_seltime }, |
| 1404 | { "tag_info", NULL }, |
| 1405 | { "global_tag_depth", NULL }, |
| 1406 | { "dv", NULL } |
| 1407 | }; |
| 1408 | |
| 1409 | end = strchr(s, '\0'); |
| 1410 | |
| 1411 | /* |
| 1412 | * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS |
| 1413 | * will never be 0 in this case. |
| 1414 | */ |
| 1415 | n = 0; |
| 1416 | |
| 1417 | while ((p = strsep(&s, ",.")) != NULL) { |
| 1418 | if (*p == '\0') |
| 1419 | continue; |
| 1420 | for (i = 0; i < NUM_ELEMENTS(options); i++) { |
| 1421 | |
| 1422 | n = strlen(options[i].name); |
| 1423 | if (strncmp(options[i].name, p, n) == 0) |
| 1424 | break; |
| 1425 | } |
| 1426 | if (i == NUM_ELEMENTS(options)) |
| 1427 | continue; |
| 1428 | |
| 1429 | if (strncmp(p, "global_tag_depth", n) == 0) { |
| 1430 | ahc_linux_setup_tag_info_global(p + n); |
| 1431 | } else if (strncmp(p, "tag_info", n) == 0) { |
| 1432 | s = aic_parse_brace_option("tag_info", p + n, end, |
| 1433 | 2, ahc_linux_setup_tag_info, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | } else if (p[n] == ':') { |
| 1435 | *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); |
| 1436 | } else if (strncmp(p, "verbose", n) == 0) { |
| 1437 | *(options[i].flag) = 1; |
| 1438 | } else { |
| 1439 | *(options[i].flag) ^= 0xFFFFFFFF; |
| 1440 | } |
| 1441 | } |
| 1442 | return 1; |
| 1443 | } |
| 1444 | |
| 1445 | __setup("aic7xxx=", aic7xxx_setup); |
| 1446 | |
| 1447 | uint32_t aic7xxx_verbose; |
| 1448 | |
| 1449 | int |
| 1450 | ahc_linux_register_host(struct ahc_softc *ahc, Scsi_Host_Template *template) |
| 1451 | { |
| 1452 | char buf[80]; |
| 1453 | struct Scsi_Host *host; |
| 1454 | char *new_name; |
| 1455 | u_long s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | |
| 1457 | template->name = ahc->description; |
| 1458 | host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); |
| 1459 | if (host == NULL) |
| 1460 | return (ENOMEM); |
| 1461 | |
| 1462 | *((struct ahc_softc **)host->hostdata) = ahc; |
| 1463 | ahc_lock(ahc, &s); |
| 1464 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
| 1465 | scsi_assign_lock(host, &ahc->platform_data->spin_lock); |
| 1466 | #elif AHC_SCSI_HAS_HOST_LOCK != 0 |
| 1467 | host->lock = &ahc->platform_data->spin_lock; |
| 1468 | #endif |
| 1469 | ahc->platform_data->host = host; |
| 1470 | host->can_queue = AHC_MAX_QUEUE; |
| 1471 | host->cmd_per_lun = 2; |
| 1472 | /* XXX No way to communicate the ID for multiple channels */ |
| 1473 | host->this_id = ahc->our_id; |
| 1474 | host->irq = ahc->platform_data->irq; |
| 1475 | host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; |
| 1476 | host->max_lun = AHC_NUM_LUNS; |
| 1477 | host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; |
| 1478 | host->sg_tablesize = AHC_NSEG; |
| 1479 | ahc_set_unit(ahc, ahc_linux_next_unit()); |
| 1480 | sprintf(buf, "scsi%d", host->host_no); |
| 1481 | new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); |
| 1482 | if (new_name != NULL) { |
| 1483 | strcpy(new_name, buf); |
| 1484 | ahc_set_name(ahc, new_name); |
| 1485 | } |
| 1486 | host->unique_id = ahc->unit; |
| 1487 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) |
| 1488 | scsi_set_pci_device(host, ahc->dev_softc); |
| 1489 | #endif |
| 1490 | ahc_linux_initialize_scsi_bus(ahc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | ahc_intr_enable(ahc, TRUE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | ahc_unlock(ahc, &s); |
| 1493 | |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 1494 | host->transportt = ahc_linux_transport_template; |
| 1495 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1496 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
| 1497 | scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */ |
| 1498 | scsi_scan_host(host); |
| 1499 | #endif |
| 1500 | return (0); |
| 1501 | } |
| 1502 | |
| 1503 | uint64_t |
| 1504 | ahc_linux_get_memsize(void) |
| 1505 | { |
| 1506 | struct sysinfo si; |
| 1507 | |
| 1508 | si_meminfo(&si); |
| 1509 | return ((uint64_t)si.totalram << PAGE_SHIFT); |
| 1510 | } |
| 1511 | |
| 1512 | /* |
| 1513 | * Find the smallest available unit number to use |
| 1514 | * for a new device. We don't just use a static |
| 1515 | * count to handle the "repeated hot-(un)plug" |
| 1516 | * scenario. |
| 1517 | */ |
| 1518 | static int |
| 1519 | ahc_linux_next_unit(void) |
| 1520 | { |
| 1521 | struct ahc_softc *ahc; |
| 1522 | int unit; |
| 1523 | |
| 1524 | unit = 0; |
| 1525 | retry: |
| 1526 | TAILQ_FOREACH(ahc, &ahc_tailq, links) { |
| 1527 | if (ahc->unit == unit) { |
| 1528 | unit++; |
| 1529 | goto retry; |
| 1530 | } |
| 1531 | } |
| 1532 | return (unit); |
| 1533 | } |
| 1534 | |
| 1535 | /* |
| 1536 | * Place the SCSI bus into a known state by either resetting it, |
| 1537 | * or forcing transfer negotiations on the next command to any |
| 1538 | * target. |
| 1539 | */ |
| 1540 | void |
| 1541 | ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) |
| 1542 | { |
| 1543 | int i; |
| 1544 | int numtarg; |
| 1545 | |
| 1546 | i = 0; |
| 1547 | numtarg = 0; |
| 1548 | |
| 1549 | if (aic7xxx_no_reset != 0) |
| 1550 | ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); |
| 1551 | |
| 1552 | if ((ahc->flags & AHC_RESET_BUS_A) != 0) |
| 1553 | ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); |
| 1554 | else |
| 1555 | numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; |
| 1556 | |
| 1557 | if ((ahc->features & AHC_TWIN) != 0) { |
| 1558 | |
| 1559 | if ((ahc->flags & AHC_RESET_BUS_B) != 0) { |
| 1560 | ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); |
| 1561 | } else { |
| 1562 | if (numtarg == 0) |
| 1563 | i = 8; |
| 1564 | numtarg += 8; |
| 1565 | } |
| 1566 | } |
| 1567 | |
| 1568 | /* |
| 1569 | * Force negotiation to async for all targets that |
| 1570 | * will not see an initial bus reset. |
| 1571 | */ |
| 1572 | for (; i < numtarg; i++) { |
| 1573 | struct ahc_devinfo devinfo; |
| 1574 | struct ahc_initiator_tinfo *tinfo; |
| 1575 | struct ahc_tmode_tstate *tstate; |
| 1576 | u_int our_id; |
| 1577 | u_int target_id; |
| 1578 | char channel; |
| 1579 | |
| 1580 | channel = 'A'; |
| 1581 | our_id = ahc->our_id; |
| 1582 | target_id = i; |
| 1583 | if (i > 7 && (ahc->features & AHC_TWIN) != 0) { |
| 1584 | channel = 'B'; |
| 1585 | our_id = ahc->our_id_b; |
| 1586 | target_id = i % 8; |
| 1587 | } |
| 1588 | tinfo = ahc_fetch_transinfo(ahc, channel, our_id, |
| 1589 | target_id, &tstate); |
| 1590 | ahc_compile_devinfo(&devinfo, our_id, target_id, |
| 1591 | CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); |
| 1592 | ahc_update_neg_request(ahc, &devinfo, tstate, |
| 1593 | tinfo, AHC_NEG_ALWAYS); |
| 1594 | } |
| 1595 | /* Give the bus some time to recover */ |
| 1596 | if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { |
| 1597 | ahc_linux_freeze_simq(ahc); |
| 1598 | init_timer(&ahc->platform_data->reset_timer); |
| 1599 | ahc->platform_data->reset_timer.data = (u_long)ahc; |
| 1600 | ahc->platform_data->reset_timer.expires = |
| 1601 | jiffies + (AIC7XXX_RESET_DELAY * HZ)/1000; |
| 1602 | ahc->platform_data->reset_timer.function = |
| 1603 | ahc_linux_release_simq; |
| 1604 | add_timer(&ahc->platform_data->reset_timer); |
| 1605 | } |
| 1606 | } |
| 1607 | |
| 1608 | int |
| 1609 | ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) |
| 1610 | { |
| 1611 | |
| 1612 | ahc->platform_data = |
| 1613 | malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT); |
| 1614 | if (ahc->platform_data == NULL) |
| 1615 | return (ENOMEM); |
| 1616 | memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); |
| 1617 | TAILQ_INIT(&ahc->platform_data->completeq); |
| 1618 | TAILQ_INIT(&ahc->platform_data->device_runq); |
| 1619 | ahc->platform_data->irq = AHC_LINUX_NOIRQ; |
| 1620 | ahc->platform_data->hw_dma_mask = 0xFFFFFFFF; |
| 1621 | ahc_lockinit(ahc); |
| 1622 | ahc_done_lockinit(ahc); |
| 1623 | init_timer(&ahc->platform_data->completeq_timer); |
| 1624 | ahc->platform_data->completeq_timer.data = (u_long)ahc; |
| 1625 | ahc->platform_data->completeq_timer.function = |
| 1626 | (ahc_linux_callback_t *)ahc_linux_thread_run_complete_queue; |
| 1627 | init_MUTEX_LOCKED(&ahc->platform_data->eh_sem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | ahc->seltime = (aic7xxx_seltime & 0x3) << 4; |
| 1629 | ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; |
| 1630 | if (aic7xxx_pci_parity == 0) |
| 1631 | ahc->flags |= AHC_DISABLE_PCI_PERR; |
| 1632 | |
| 1633 | return (0); |
| 1634 | } |
| 1635 | |
| 1636 | void |
| 1637 | ahc_platform_free(struct ahc_softc *ahc) |
| 1638 | { |
| 1639 | struct ahc_linux_target *targ; |
| 1640 | struct ahc_linux_device *dev; |
| 1641 | int i, j; |
| 1642 | |
| 1643 | if (ahc->platform_data != NULL) { |
| 1644 | del_timer_sync(&ahc->platform_data->completeq_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | if (ahc->platform_data->host != NULL) { |
| 1646 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
| 1647 | scsi_remove_host(ahc->platform_data->host); |
| 1648 | #endif |
| 1649 | scsi_host_put(ahc->platform_data->host); |
| 1650 | } |
| 1651 | |
| 1652 | /* destroy all of the device and target objects */ |
| 1653 | for (i = 0; i < AHC_NUM_TARGETS; i++) { |
| 1654 | targ = ahc->platform_data->targets[i]; |
| 1655 | if (targ != NULL) { |
| 1656 | /* Keep target around through the loop. */ |
| 1657 | targ->refcount++; |
| 1658 | for (j = 0; j < AHC_NUM_LUNS; j++) { |
| 1659 | |
| 1660 | if (targ->devices[j] == NULL) |
| 1661 | continue; |
| 1662 | dev = targ->devices[j]; |
| 1663 | ahc_linux_free_device(ahc, dev); |
| 1664 | } |
| 1665 | /* |
| 1666 | * Forcibly free the target now that |
| 1667 | * all devices are gone. |
| 1668 | */ |
| 1669 | ahc_linux_free_target(ahc, targ); |
| 1670 | } |
| 1671 | } |
| 1672 | |
| 1673 | if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) |
| 1674 | free_irq(ahc->platform_data->irq, ahc); |
| 1675 | if (ahc->tag == BUS_SPACE_PIO |
| 1676 | && ahc->bsh.ioport != 0) |
| 1677 | release_region(ahc->bsh.ioport, 256); |
| 1678 | if (ahc->tag == BUS_SPACE_MEMIO |
| 1679 | && ahc->bsh.maddr != NULL) { |
| 1680 | iounmap(ahc->bsh.maddr); |
| 1681 | release_mem_region(ahc->platform_data->mem_busaddr, |
| 1682 | 0x1000); |
| 1683 | } |
| 1684 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) |
| 1685 | /* |
| 1686 | * In 2.4 we detach from the scsi midlayer before the PCI |
| 1687 | * layer invokes our remove callback. No per-instance |
| 1688 | * detach is provided, so we must reach inside the PCI |
| 1689 | * subsystem's internals and detach our driver manually. |
| 1690 | */ |
| 1691 | if (ahc->dev_softc != NULL) |
| 1692 | ahc->dev_softc->driver = NULL; |
| 1693 | #endif |
| 1694 | free(ahc->platform_data, M_DEVBUF); |
| 1695 | } |
| 1696 | } |
| 1697 | |
| 1698 | void |
| 1699 | ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) |
| 1700 | { |
| 1701 | ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), |
| 1702 | SCB_GET_CHANNEL(ahc, scb), |
| 1703 | SCB_GET_LUN(scb), SCB_LIST_NULL, |
| 1704 | ROLE_UNKNOWN, CAM_REQUEUE_REQ); |
| 1705 | } |
| 1706 | |
| 1707 | void |
| 1708 | ahc_platform_set_tags(struct ahc_softc *ahc, struct ahc_devinfo *devinfo, |
| 1709 | ahc_queue_alg alg) |
| 1710 | { |
| 1711 | struct ahc_linux_device *dev; |
| 1712 | int was_queuing; |
| 1713 | int now_queuing; |
| 1714 | |
| 1715 | dev = ahc_linux_get_device(ahc, devinfo->channel - 'A', |
| 1716 | devinfo->target, |
| 1717 | devinfo->lun, /*alloc*/FALSE); |
| 1718 | if (dev == NULL) |
| 1719 | return; |
| 1720 | was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); |
| 1721 | switch (alg) { |
| 1722 | default: |
| 1723 | case AHC_QUEUE_NONE: |
| 1724 | now_queuing = 0; |
| 1725 | break; |
| 1726 | case AHC_QUEUE_BASIC: |
| 1727 | now_queuing = AHC_DEV_Q_BASIC; |
| 1728 | break; |
| 1729 | case AHC_QUEUE_TAGGED: |
| 1730 | now_queuing = AHC_DEV_Q_TAGGED; |
| 1731 | break; |
| 1732 | } |
| 1733 | if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 |
| 1734 | && (was_queuing != now_queuing) |
| 1735 | && (dev->active != 0)) { |
| 1736 | dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; |
| 1737 | dev->qfrozen++; |
| 1738 | } |
| 1739 | |
| 1740 | dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); |
| 1741 | if (now_queuing) { |
| 1742 | u_int usertags; |
| 1743 | |
| 1744 | usertags = ahc_linux_user_tagdepth(ahc, devinfo); |
| 1745 | if (!was_queuing) { |
| 1746 | /* |
| 1747 | * Start out agressively and allow our |
| 1748 | * dynamic queue depth algorithm to take |
| 1749 | * care of the rest. |
| 1750 | */ |
| 1751 | dev->maxtags = usertags; |
| 1752 | dev->openings = dev->maxtags - dev->active; |
| 1753 | } |
| 1754 | if (dev->maxtags == 0) { |
| 1755 | /* |
| 1756 | * Queueing is disabled by the user. |
| 1757 | */ |
| 1758 | dev->openings = 1; |
| 1759 | } else if (alg == AHC_QUEUE_TAGGED) { |
| 1760 | dev->flags |= AHC_DEV_Q_TAGGED; |
| 1761 | if (aic7xxx_periodic_otag != 0) |
| 1762 | dev->flags |= AHC_DEV_PERIODIC_OTAG; |
| 1763 | } else |
| 1764 | dev->flags |= AHC_DEV_Q_BASIC; |
| 1765 | } else { |
| 1766 | /* We can only have one opening. */ |
| 1767 | dev->maxtags = 0; |
| 1768 | dev->openings = 1 - dev->active; |
| 1769 | } |
| 1770 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
| 1771 | if (dev->scsi_device != NULL) { |
| 1772 | switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { |
| 1773 | case AHC_DEV_Q_BASIC: |
| 1774 | scsi_adjust_queue_depth(dev->scsi_device, |
| 1775 | MSG_SIMPLE_TASK, |
| 1776 | dev->openings + dev->active); |
| 1777 | break; |
| 1778 | case AHC_DEV_Q_TAGGED: |
| 1779 | scsi_adjust_queue_depth(dev->scsi_device, |
| 1780 | MSG_ORDERED_TASK, |
| 1781 | dev->openings + dev->active); |
| 1782 | break; |
| 1783 | default: |
| 1784 | /* |
| 1785 | * We allow the OS to queue 2 untagged transactions to |
| 1786 | * us at any time even though we can only execute them |
| 1787 | * serially on the controller/device. This should |
| 1788 | * remove some latency. |
| 1789 | */ |
| 1790 | scsi_adjust_queue_depth(dev->scsi_device, |
| 1791 | /*NON-TAGGED*/0, |
| 1792 | /*queue depth*/2); |
| 1793 | break; |
| 1794 | } |
| 1795 | } |
| 1796 | #endif |
| 1797 | } |
| 1798 | |
| 1799 | int |
| 1800 | ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, |
| 1801 | int lun, u_int tag, role_t role, uint32_t status) |
| 1802 | { |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame^] | 1803 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1804 | } |
| 1805 | |
| 1806 | static void |
| 1807 | ahc_linux_thread_run_complete_queue(struct ahc_softc *ahc) |
| 1808 | { |
| 1809 | u_long flags; |
| 1810 | |
| 1811 | ahc_lock(ahc, &flags); |
| 1812 | del_timer(&ahc->platform_data->completeq_timer); |
| 1813 | ahc->platform_data->flags &= ~AHC_RUN_CMPLT_Q_TIMER; |
| 1814 | ahc_linux_run_complete_queue(ahc); |
| 1815 | ahc_unlock(ahc, &flags); |
| 1816 | } |
| 1817 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | static u_int |
| 1819 | ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) |
| 1820 | { |
| 1821 | static int warned_user; |
| 1822 | u_int tags; |
| 1823 | |
| 1824 | tags = 0; |
| 1825 | if ((ahc->user_discenable & devinfo->target_mask) != 0) { |
| 1826 | if (ahc->unit >= NUM_ELEMENTS(aic7xxx_tag_info)) { |
| 1827 | if (warned_user == 0) { |
| 1828 | |
| 1829 | printf(KERN_WARNING |
| 1830 | "aic7xxx: WARNING: Insufficient tag_info instances\n" |
| 1831 | "aic7xxx: for installed controllers. Using defaults\n" |
| 1832 | "aic7xxx: Please update the aic7xxx_tag_info array in\n" |
| 1833 | "aic7xxx: the aic7xxx_osm..c source file.\n"); |
| 1834 | warned_user++; |
| 1835 | } |
| 1836 | tags = AHC_MAX_QUEUE; |
| 1837 | } else { |
| 1838 | adapter_tag_info_t *tag_info; |
| 1839 | |
| 1840 | tag_info = &aic7xxx_tag_info[ahc->unit]; |
| 1841 | tags = tag_info->tag_commands[devinfo->target_offset]; |
| 1842 | if (tags > AHC_MAX_QUEUE) |
| 1843 | tags = AHC_MAX_QUEUE; |
| 1844 | } |
| 1845 | } |
| 1846 | return (tags); |
| 1847 | } |
| 1848 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1849 | /* |
| 1850 | * Determines the queue depth for a given device. |
| 1851 | */ |
| 1852 | static void |
| 1853 | ahc_linux_device_queue_depth(struct ahc_softc *ahc, |
| 1854 | struct ahc_linux_device *dev) |
| 1855 | { |
| 1856 | struct ahc_devinfo devinfo; |
| 1857 | u_int tags; |
| 1858 | |
| 1859 | ahc_compile_devinfo(&devinfo, |
| 1860 | dev->target->channel == 0 |
| 1861 | ? ahc->our_id : ahc->our_id_b, |
| 1862 | dev->target->target, dev->lun, |
| 1863 | dev->target->channel == 0 ? 'A' : 'B', |
| 1864 | ROLE_INITIATOR); |
| 1865 | tags = ahc_linux_user_tagdepth(ahc, &devinfo); |
| 1866 | if (tags != 0 |
| 1867 | && dev->scsi_device != NULL |
| 1868 | && dev->scsi_device->tagged_supported != 0) { |
| 1869 | |
| 1870 | ahc_set_tags(ahc, &devinfo, AHC_QUEUE_TAGGED); |
| 1871 | ahc_print_devinfo(ahc, &devinfo); |
| 1872 | printf("Tagged Queuing enabled. Depth %d\n", tags); |
| 1873 | } else { |
| 1874 | ahc_set_tags(ahc, &devinfo, AHC_QUEUE_NONE); |
| 1875 | } |
| 1876 | } |
| 1877 | |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame^] | 1878 | static int |
| 1879 | ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, |
| 1880 | struct scsi_cmnd *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | struct scb *scb; |
| 1883 | struct hardware_scb *hscb; |
| 1884 | struct ahc_initiator_tinfo *tinfo; |
| 1885 | struct ahc_tmode_tstate *tstate; |
| 1886 | uint16_t mask; |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame^] | 1887 | struct scb_tailq *untagged_q = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame^] | 1889 | /* |
| 1890 | * Schedule us to run later. The only reason we are not |
| 1891 | * running is because the whole controller Q is frozen. |
| 1892 | */ |
| 1893 | if (ahc->platform_data->qfrozen != 0) |
| 1894 | return SCSI_MLQUEUE_HOST_BUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame^] | 1896 | /* |
| 1897 | * We only allow one untagged transaction |
| 1898 | * per target in the initiator role unless |
| 1899 | * we are storing a full busy target *lun* |
| 1900 | * table in SCB space. |
| 1901 | */ |
| 1902 | if (!blk_rq_tagged(cmd->request) |
| 1903 | && (ahc->features & AHC_SCB_BTT) == 0) { |
| 1904 | int target_offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1905 | |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame^] | 1906 | target_offset = cmd->device->id + cmd->device->channel * 8; |
| 1907 | untagged_q = &(ahc->untagged_queues[target_offset]); |
| 1908 | if (!TAILQ_EMPTY(untagged_q)) |
| 1909 | /* if we're already executing an untagged command |
| 1910 | * we're busy to another */ |
| 1911 | return SCSI_MLQUEUE_DEVICE_BUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1912 | } |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame^] | 1913 | |
| 1914 | /* |
| 1915 | * Get an scb to use. |
| 1916 | */ |
| 1917 | if ((scb = ahc_get_scb(ahc)) == NULL) { |
| 1918 | ahc->flags |= AHC_RESOURCE_SHORTAGE; |
| 1919 | return SCSI_MLQUEUE_HOST_BUSY; |
| 1920 | } |
| 1921 | |
| 1922 | scb->io_ctx = cmd; |
| 1923 | scb->platform_data->dev = dev; |
| 1924 | hscb = scb->hscb; |
| 1925 | cmd->host_scribble = (char *)scb; |
| 1926 | |
| 1927 | /* |
| 1928 | * Fill out basics of the HSCB. |
| 1929 | */ |
| 1930 | hscb->control = 0; |
| 1931 | hscb->scsiid = BUILD_SCSIID(ahc, cmd); |
| 1932 | hscb->lun = cmd->device->lun; |
| 1933 | mask = SCB_GET_TARGET_MASK(ahc, scb); |
| 1934 | tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), |
| 1935 | SCB_GET_OUR_ID(scb), |
| 1936 | SCB_GET_TARGET(ahc, scb), &tstate); |
| 1937 | hscb->scsirate = tinfo->scsirate; |
| 1938 | hscb->scsioffset = tinfo->curr.offset; |
| 1939 | if ((tstate->ultraenb & mask) != 0) |
| 1940 | hscb->control |= ULTRAENB; |
| 1941 | |
| 1942 | if ((ahc->user_discenable & mask) != 0) |
| 1943 | hscb->control |= DISCENB; |
| 1944 | |
| 1945 | if ((tstate->auto_negotiate & mask) != 0) { |
| 1946 | scb->flags |= SCB_AUTO_NEGOTIATE; |
| 1947 | scb->hscb->control |= MK_MESSAGE; |
| 1948 | } |
| 1949 | |
| 1950 | if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { |
| 1951 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
| 1952 | int msg_bytes; |
| 1953 | uint8_t tag_msgs[2]; |
| 1954 | |
| 1955 | msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); |
| 1956 | if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { |
| 1957 | hscb->control |= tag_msgs[0]; |
| 1958 | if (tag_msgs[0] == MSG_ORDERED_TASK) |
| 1959 | dev->commands_since_idle_or_otag = 0; |
| 1960 | } else |
| 1961 | #endif |
| 1962 | if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH |
| 1963 | && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { |
| 1964 | hscb->control |= MSG_ORDERED_TASK; |
| 1965 | dev->commands_since_idle_or_otag = 0; |
| 1966 | } else { |
| 1967 | hscb->control |= MSG_SIMPLE_TASK; |
| 1968 | } |
| 1969 | } |
| 1970 | |
| 1971 | hscb->cdb_len = cmd->cmd_len; |
| 1972 | if (hscb->cdb_len <= 12) { |
| 1973 | memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); |
| 1974 | } else { |
| 1975 | memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); |
| 1976 | scb->flags |= SCB_CDB32_PTR; |
| 1977 | } |
| 1978 | |
| 1979 | scb->platform_data->xfer_len = 0; |
| 1980 | ahc_set_residual(scb, 0); |
| 1981 | ahc_set_sense_residual(scb, 0); |
| 1982 | scb->sg_count = 0; |
| 1983 | if (cmd->use_sg != 0) { |
| 1984 | struct ahc_dma_seg *sg; |
| 1985 | struct scatterlist *cur_seg; |
| 1986 | struct scatterlist *end_seg; |
| 1987 | int nseg; |
| 1988 | |
| 1989 | cur_seg = (struct scatterlist *)cmd->request_buffer; |
| 1990 | nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg, |
| 1991 | cmd->sc_data_direction); |
| 1992 | end_seg = cur_seg + nseg; |
| 1993 | /* Copy the segments into the SG list. */ |
| 1994 | sg = scb->sg_list; |
| 1995 | /* |
| 1996 | * The sg_count may be larger than nseg if |
| 1997 | * a transfer crosses a 32bit page. |
| 1998 | */ |
| 1999 | while (cur_seg < end_seg) { |
| 2000 | dma_addr_t addr; |
| 2001 | bus_size_t len; |
| 2002 | int consumed; |
| 2003 | |
| 2004 | addr = sg_dma_address(cur_seg); |
| 2005 | len = sg_dma_len(cur_seg); |
| 2006 | consumed = ahc_linux_map_seg(ahc, scb, |
| 2007 | sg, addr, len); |
| 2008 | sg += consumed; |
| 2009 | scb->sg_count += consumed; |
| 2010 | cur_seg++; |
| 2011 | } |
| 2012 | sg--; |
| 2013 | sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); |
| 2014 | |
| 2015 | /* |
| 2016 | * Reset the sg list pointer. |
| 2017 | */ |
| 2018 | scb->hscb->sgptr = |
| 2019 | ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); |
| 2020 | |
| 2021 | /* |
| 2022 | * Copy the first SG into the "current" |
| 2023 | * data pointer area. |
| 2024 | */ |
| 2025 | scb->hscb->dataptr = scb->sg_list->addr; |
| 2026 | scb->hscb->datacnt = scb->sg_list->len; |
| 2027 | } else if (cmd->request_bufflen != 0) { |
| 2028 | struct ahc_dma_seg *sg; |
| 2029 | dma_addr_t addr; |
| 2030 | |
| 2031 | sg = scb->sg_list; |
| 2032 | addr = pci_map_single(ahc->dev_softc, |
| 2033 | cmd->request_buffer, |
| 2034 | cmd->request_bufflen, |
| 2035 | cmd->sc_data_direction); |
| 2036 | scb->platform_data->buf_busaddr = addr; |
| 2037 | scb->sg_count = ahc_linux_map_seg(ahc, scb, |
| 2038 | sg, addr, |
| 2039 | cmd->request_bufflen); |
| 2040 | sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); |
| 2041 | |
| 2042 | /* |
| 2043 | * Reset the sg list pointer. |
| 2044 | */ |
| 2045 | scb->hscb->sgptr = |
| 2046 | ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); |
| 2047 | |
| 2048 | /* |
| 2049 | * Copy the first SG into the "current" |
| 2050 | * data pointer area. |
| 2051 | */ |
| 2052 | scb->hscb->dataptr = sg->addr; |
| 2053 | scb->hscb->datacnt = sg->len; |
| 2054 | } else { |
| 2055 | scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); |
| 2056 | scb->hscb->dataptr = 0; |
| 2057 | scb->hscb->datacnt = 0; |
| 2058 | scb->sg_count = 0; |
| 2059 | } |
| 2060 | |
| 2061 | LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); |
| 2062 | dev->openings--; |
| 2063 | dev->active++; |
| 2064 | dev->commands_issued++; |
| 2065 | if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) |
| 2066 | dev->commands_since_idle_or_otag++; |
| 2067 | |
| 2068 | scb->flags |= SCB_ACTIVE; |
| 2069 | if (untagged_q) { |
| 2070 | TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); |
| 2071 | scb->flags |= SCB_UNTAGGEDQ; |
| 2072 | } |
| 2073 | ahc_queue_scb(ahc, scb); |
| 2074 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2075 | } |
| 2076 | |
| 2077 | /* |
| 2078 | * SCSI controller interrupt handler. |
| 2079 | */ |
| 2080 | irqreturn_t |
| 2081 | ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs) |
| 2082 | { |
| 2083 | struct ahc_softc *ahc; |
| 2084 | u_long flags; |
| 2085 | int ours; |
| 2086 | |
| 2087 | ahc = (struct ahc_softc *) dev_id; |
| 2088 | ahc_lock(ahc, &flags); |
| 2089 | ours = ahc_intr(ahc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2090 | ahc_linux_run_complete_queue(ahc); |
| 2091 | ahc_unlock(ahc, &flags); |
| 2092 | return IRQ_RETVAL(ours); |
| 2093 | } |
| 2094 | |
| 2095 | void |
| 2096 | ahc_platform_flushwork(struct ahc_softc *ahc) |
| 2097 | { |
| 2098 | |
| 2099 | while (ahc_linux_run_complete_queue(ahc) != NULL) |
| 2100 | ; |
| 2101 | } |
| 2102 | |
| 2103 | static struct ahc_linux_target* |
| 2104 | ahc_linux_alloc_target(struct ahc_softc *ahc, u_int channel, u_int target) |
| 2105 | { |
| 2106 | struct ahc_linux_target *targ; |
| 2107 | u_int target_offset; |
| 2108 | |
| 2109 | target_offset = target; |
| 2110 | if (channel != 0) |
| 2111 | target_offset += 8; |
| 2112 | |
| 2113 | targ = malloc(sizeof(*targ), M_DEVBUG, M_NOWAIT); |
| 2114 | if (targ == NULL) |
| 2115 | return (NULL); |
| 2116 | memset(targ, 0, sizeof(*targ)); |
| 2117 | targ->channel = channel; |
| 2118 | targ->target = target; |
| 2119 | targ->ahc = ahc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2120 | ahc->platform_data->targets[target_offset] = targ; |
| 2121 | return (targ); |
| 2122 | } |
| 2123 | |
| 2124 | static void |
| 2125 | ahc_linux_free_target(struct ahc_softc *ahc, struct ahc_linux_target *targ) |
| 2126 | { |
| 2127 | struct ahc_devinfo devinfo; |
| 2128 | struct ahc_initiator_tinfo *tinfo; |
| 2129 | struct ahc_tmode_tstate *tstate; |
| 2130 | u_int our_id; |
| 2131 | u_int target_offset; |
| 2132 | char channel; |
| 2133 | |
| 2134 | /* |
| 2135 | * Force a negotiation to async/narrow on any |
| 2136 | * future command to this device unless a bus |
| 2137 | * reset occurs between now and that command. |
| 2138 | */ |
| 2139 | channel = 'A' + targ->channel; |
| 2140 | our_id = ahc->our_id; |
| 2141 | target_offset = targ->target; |
| 2142 | if (targ->channel != 0) { |
| 2143 | target_offset += 8; |
| 2144 | our_id = ahc->our_id_b; |
| 2145 | } |
| 2146 | tinfo = ahc_fetch_transinfo(ahc, channel, our_id, |
| 2147 | targ->target, &tstate); |
| 2148 | ahc_compile_devinfo(&devinfo, our_id, targ->target, CAM_LUN_WILDCARD, |
| 2149 | channel, ROLE_INITIATOR); |
| 2150 | ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, |
| 2151 | AHC_TRANS_GOAL, /*paused*/FALSE); |
| 2152 | ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, |
| 2153 | AHC_TRANS_GOAL, /*paused*/FALSE); |
| 2154 | ahc_update_neg_request(ahc, &devinfo, tstate, tinfo, AHC_NEG_ALWAYS); |
| 2155 | ahc->platform_data->targets[target_offset] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2156 | free(targ, M_DEVBUF); |
| 2157 | } |
| 2158 | |
| 2159 | static struct ahc_linux_device* |
| 2160 | ahc_linux_alloc_device(struct ahc_softc *ahc, |
| 2161 | struct ahc_linux_target *targ, u_int lun) |
| 2162 | { |
| 2163 | struct ahc_linux_device *dev; |
| 2164 | |
| 2165 | dev = malloc(sizeof(*dev), M_DEVBUG, M_NOWAIT); |
| 2166 | if (dev == NULL) |
| 2167 | return (NULL); |
| 2168 | memset(dev, 0, sizeof(*dev)); |
| 2169 | init_timer(&dev->timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2170 | dev->flags = AHC_DEV_UNCONFIGURED; |
| 2171 | dev->lun = lun; |
| 2172 | dev->target = targ; |
| 2173 | |
| 2174 | /* |
| 2175 | * We start out life using untagged |
| 2176 | * transactions of which we allow one. |
| 2177 | */ |
| 2178 | dev->openings = 1; |
| 2179 | |
| 2180 | /* |
| 2181 | * Set maxtags to 0. This will be changed if we |
| 2182 | * later determine that we are dealing with |
| 2183 | * a tagged queuing capable device. |
| 2184 | */ |
| 2185 | dev->maxtags = 0; |
| 2186 | |
| 2187 | targ->refcount++; |
| 2188 | targ->devices[lun] = dev; |
| 2189 | return (dev); |
| 2190 | } |
| 2191 | |
| 2192 | static void |
| 2193 | __ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev) |
| 2194 | { |
| 2195 | struct ahc_linux_target *targ; |
| 2196 | |
| 2197 | targ = dev->target; |
| 2198 | targ->devices[dev->lun] = NULL; |
| 2199 | free(dev, M_DEVBUF); |
| 2200 | targ->refcount--; |
| cb62402 | 2005-04-17 18:03:20 -0500 | [diff] [blame] | 2201 | if (targ->refcount == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2202 | ahc_linux_free_target(ahc, targ); |
| 2203 | } |
| 2204 | |
| 2205 | static void |
| 2206 | ahc_linux_free_device(struct ahc_softc *ahc, struct ahc_linux_device *dev) |
| 2207 | { |
| 2208 | del_timer_sync(&dev->timer); |
| 2209 | __ahc_linux_free_device(ahc, dev); |
| 2210 | } |
| 2211 | |
| 2212 | void |
| 2213 | ahc_send_async(struct ahc_softc *ahc, char channel, |
| 2214 | u_int target, u_int lun, ac_code code, void *arg) |
| 2215 | { |
| 2216 | switch (code) { |
| 2217 | case AC_TRANSFER_NEG: |
| 2218 | { |
| 2219 | char buf[80]; |
| 2220 | struct ahc_linux_target *targ; |
| 2221 | struct info_str info; |
| 2222 | struct ahc_initiator_tinfo *tinfo; |
| 2223 | struct ahc_tmode_tstate *tstate; |
| 2224 | int target_offset; |
| 2225 | |
| 2226 | info.buffer = buf; |
| 2227 | info.length = sizeof(buf); |
| 2228 | info.offset = 0; |
| 2229 | info.pos = 0; |
| 2230 | tinfo = ahc_fetch_transinfo(ahc, channel, |
| 2231 | channel == 'A' ? ahc->our_id |
| 2232 | : ahc->our_id_b, |
| 2233 | target, &tstate); |
| 2234 | |
| 2235 | /* |
| 2236 | * Don't bother reporting results while |
| 2237 | * negotiations are still pending. |
| 2238 | */ |
| 2239 | if (tinfo->curr.period != tinfo->goal.period |
| 2240 | || tinfo->curr.width != tinfo->goal.width |
| 2241 | || tinfo->curr.offset != tinfo->goal.offset |
| 2242 | || tinfo->curr.ppr_options != tinfo->goal.ppr_options) |
| 2243 | if (bootverbose == 0) |
| 2244 | break; |
| 2245 | |
| 2246 | /* |
| 2247 | * Don't bother reporting results that |
| 2248 | * are identical to those last reported. |
| 2249 | */ |
| 2250 | target_offset = target; |
| 2251 | if (channel == 'B') |
| 2252 | target_offset += 8; |
| 2253 | targ = ahc->platform_data->targets[target_offset]; |
| 2254 | if (targ == NULL) |
| 2255 | break; |
| 2256 | if (tinfo->curr.period == targ->last_tinfo.period |
| 2257 | && tinfo->curr.width == targ->last_tinfo.width |
| 2258 | && tinfo->curr.offset == targ->last_tinfo.offset |
| 2259 | && tinfo->curr.ppr_options == targ->last_tinfo.ppr_options) |
| 2260 | if (bootverbose == 0) |
| 2261 | break; |
| 2262 | |
| 2263 | targ->last_tinfo.period = tinfo->curr.period; |
| 2264 | targ->last_tinfo.width = tinfo->curr.width; |
| 2265 | targ->last_tinfo.offset = tinfo->curr.offset; |
| 2266 | targ->last_tinfo.ppr_options = tinfo->curr.ppr_options; |
| 2267 | |
| 2268 | printf("(%s:%c:", ahc_name(ahc), channel); |
| 2269 | if (target == CAM_TARGET_WILDCARD) |
| 2270 | printf("*): "); |
| 2271 | else |
| 2272 | printf("%d): ", target); |
| 2273 | ahc_format_transinfo(&info, &tinfo->curr); |
| 2274 | if (info.pos < info.length) |
| 2275 | *info.buffer = '\0'; |
| 2276 | else |
| 2277 | buf[info.length - 1] = '\0'; |
| 2278 | printf("%s", buf); |
| 2279 | break; |
| 2280 | } |
| 2281 | case AC_SENT_BDR: |
| 2282 | { |
| 2283 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
| 2284 | WARN_ON(lun != CAM_LUN_WILDCARD); |
| 2285 | scsi_report_device_reset(ahc->platform_data->host, |
| 2286 | channel - 'A', target); |
| 2287 | #else |
| 2288 | Scsi_Device *scsi_dev; |
| 2289 | |
| 2290 | /* |
| 2291 | * Find the SCSI device associated with this |
| 2292 | * request and indicate that a UA is expected. |
| 2293 | */ |
| 2294 | for (scsi_dev = ahc->platform_data->host->host_queue; |
| 2295 | scsi_dev != NULL; scsi_dev = scsi_dev->next) { |
| 2296 | if (channel - 'A' == scsi_dev->channel |
| 2297 | && target == scsi_dev->id |
| 2298 | && (lun == CAM_LUN_WILDCARD |
| 2299 | || lun == scsi_dev->lun)) { |
| 2300 | scsi_dev->was_reset = 1; |
| 2301 | scsi_dev->expecting_cc_ua = 1; |
| 2302 | } |
| 2303 | } |
| 2304 | #endif |
| 2305 | break; |
| 2306 | } |
| 2307 | case AC_BUS_RESET: |
| 2308 | if (ahc->platform_data->host != NULL) { |
| 2309 | scsi_report_bus_reset(ahc->platform_data->host, |
| 2310 | channel - 'A'); |
| 2311 | } |
| 2312 | break; |
| 2313 | default: |
| 2314 | panic("ahc_send_async: Unexpected async event"); |
| 2315 | } |
| 2316 | } |
| 2317 | |
| 2318 | /* |
| 2319 | * Calls the higher level scsi done function and frees the scb. |
| 2320 | */ |
| 2321 | void |
| 2322 | ahc_done(struct ahc_softc *ahc, struct scb *scb) |
| 2323 | { |
| 2324 | Scsi_Cmnd *cmd; |
| 2325 | struct ahc_linux_device *dev; |
| 2326 | |
| 2327 | LIST_REMOVE(scb, pending_links); |
| 2328 | if ((scb->flags & SCB_UNTAGGEDQ) != 0) { |
| 2329 | struct scb_tailq *untagged_q; |
| 2330 | int target_offset; |
| 2331 | |
| 2332 | target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); |
| 2333 | untagged_q = &(ahc->untagged_queues[target_offset]); |
| 2334 | TAILQ_REMOVE(untagged_q, scb, links.tqe); |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame^] | 2335 | BUG_ON(!TAILQ_EMPTY(untagged_q)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2336 | } |
| 2337 | |
| 2338 | if ((scb->flags & SCB_ACTIVE) == 0) { |
| 2339 | printf("SCB %d done'd twice\n", scb->hscb->tag); |
| 2340 | ahc_dump_card_state(ahc); |
| 2341 | panic("Stopping for safety"); |
| 2342 | } |
| 2343 | cmd = scb->io_ctx; |
| 2344 | dev = scb->platform_data->dev; |
| 2345 | dev->active--; |
| 2346 | dev->openings++; |
| 2347 | if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { |
| 2348 | cmd->result &= ~(CAM_DEV_QFRZN << 16); |
| 2349 | dev->qfrozen--; |
| 2350 | } |
| 2351 | ahc_linux_unmap_scb(ahc, scb); |
| 2352 | |
| 2353 | /* |
| 2354 | * Guard against stale sense data. |
| 2355 | * The Linux mid-layer assumes that sense |
| 2356 | * was retrieved anytime the first byte of |
| 2357 | * the sense buffer looks "sane". |
| 2358 | */ |
| 2359 | cmd->sense_buffer[0] = 0; |
| 2360 | if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { |
| 2361 | uint32_t amount_xferred; |
| 2362 | |
| 2363 | amount_xferred = |
| 2364 | ahc_get_transfer_length(scb) - ahc_get_residual(scb); |
| 2365 | if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { |
| 2366 | #ifdef AHC_DEBUG |
| 2367 | if ((ahc_debug & AHC_SHOW_MISC) != 0) { |
| 2368 | ahc_print_path(ahc, scb); |
| 2369 | printf("Set CAM_UNCOR_PARITY\n"); |
| 2370 | } |
| 2371 | #endif |
| 2372 | ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); |
| 2373 | #ifdef AHC_REPORT_UNDERFLOWS |
| 2374 | /* |
| 2375 | * This code is disabled by default as some |
| 2376 | * clients of the SCSI system do not properly |
| 2377 | * initialize the underflow parameter. This |
| 2378 | * results in spurious termination of commands |
| 2379 | * that complete as expected (e.g. underflow is |
| 2380 | * allowed as command can return variable amounts |
| 2381 | * of data. |
| 2382 | */ |
| 2383 | } else if (amount_xferred < scb->io_ctx->underflow) { |
| 2384 | u_int i; |
| 2385 | |
| 2386 | ahc_print_path(ahc, scb); |
| 2387 | printf("CDB:"); |
| 2388 | for (i = 0; i < scb->io_ctx->cmd_len; i++) |
| 2389 | printf(" 0x%x", scb->io_ctx->cmnd[i]); |
| 2390 | printf("\n"); |
| 2391 | ahc_print_path(ahc, scb); |
| 2392 | printf("Saw underflow (%ld of %ld bytes). " |
| 2393 | "Treated as error\n", |
| 2394 | ahc_get_residual(scb), |
| 2395 | ahc_get_transfer_length(scb)); |
| 2396 | ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); |
| 2397 | #endif |
| 2398 | } else { |
| 2399 | ahc_set_transaction_status(scb, CAM_REQ_CMP); |
| 2400 | } |
| 2401 | } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { |
| 2402 | ahc_linux_handle_scsi_status(ahc, dev, scb); |
| 2403 | } else if (ahc_get_transaction_status(scb) == CAM_SEL_TIMEOUT) { |
| 2404 | dev->flags |= AHC_DEV_UNCONFIGURED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2405 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2406 | |
| 2407 | if (dev->openings == 1 |
| 2408 | && ahc_get_transaction_status(scb) == CAM_REQ_CMP |
| 2409 | && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) |
| 2410 | dev->tag_success_count++; |
| 2411 | /* |
| 2412 | * Some devices deal with temporary internal resource |
| 2413 | * shortages by returning queue full. When the queue |
| 2414 | * full occurrs, we throttle back. Slowly try to get |
| 2415 | * back to our previous queue depth. |
| 2416 | */ |
| 2417 | if ((dev->openings + dev->active) < dev->maxtags |
| 2418 | && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { |
| 2419 | dev->tag_success_count = 0; |
| 2420 | dev->openings++; |
| 2421 | } |
| 2422 | |
| 2423 | if (dev->active == 0) |
| 2424 | dev->commands_since_idle_or_otag = 0; |
| 2425 | |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame^] | 2426 | if ((dev->flags & AHC_DEV_UNCONFIGURED) != 0 |
| 2427 | && dev->active == 0 |
| 2428 | && (dev->flags & AHC_DEV_TIMER_ACTIVE) == 0) |
| 2429 | ahc_linux_free_device(ahc, dev); |
| 2430 | else if ((dev->flags & AHC_DEV_ON_RUN_LIST) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2431 | TAILQ_INSERT_TAIL(&ahc->platform_data->device_runq, dev, links); |
| 2432 | dev->flags |= AHC_DEV_ON_RUN_LIST; |
| 2433 | } |
| 2434 | |
| 2435 | if ((scb->flags & SCB_RECOVERY_SCB) != 0) { |
| 2436 | printf("Recovery SCB completes\n"); |
| 2437 | if (ahc_get_transaction_status(scb) == CAM_BDR_SENT |
| 2438 | || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) |
| 2439 | ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); |
| 2440 | if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) { |
| 2441 | ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE; |
| 2442 | up(&ahc->platform_data->eh_sem); |
| 2443 | } |
| 2444 | } |
| 2445 | |
| 2446 | ahc_free_scb(ahc, scb); |
| 2447 | ahc_linux_queue_cmd_complete(ahc, cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2448 | } |
| 2449 | |
| 2450 | static void |
| 2451 | ahc_linux_handle_scsi_status(struct ahc_softc *ahc, |
| 2452 | struct ahc_linux_device *dev, struct scb *scb) |
| 2453 | { |
| 2454 | struct ahc_devinfo devinfo; |
| 2455 | |
| 2456 | ahc_compile_devinfo(&devinfo, |
| 2457 | ahc->our_id, |
| 2458 | dev->target->target, dev->lun, |
| 2459 | dev->target->channel == 0 ? 'A' : 'B', |
| 2460 | ROLE_INITIATOR); |
| 2461 | |
| 2462 | /* |
| 2463 | * We don't currently trust the mid-layer to |
| 2464 | * properly deal with queue full or busy. So, |
| 2465 | * when one occurs, we tell the mid-layer to |
| 2466 | * unconditionally requeue the command to us |
| 2467 | * so that we can retry it ourselves. We also |
| 2468 | * implement our own throttling mechanism so |
| 2469 | * we don't clobber the device with too many |
| 2470 | * commands. |
| 2471 | */ |
| 2472 | switch (ahc_get_scsi_status(scb)) { |
| 2473 | default: |
| 2474 | break; |
| 2475 | case SCSI_STATUS_CHECK_COND: |
| 2476 | case SCSI_STATUS_CMD_TERMINATED: |
| 2477 | { |
| 2478 | Scsi_Cmnd *cmd; |
| 2479 | |
| 2480 | /* |
| 2481 | * Copy sense information to the OS's cmd |
| 2482 | * structure if it is available. |
| 2483 | */ |
| 2484 | cmd = scb->io_ctx; |
| 2485 | if (scb->flags & SCB_SENSE) { |
| 2486 | u_int sense_size; |
| 2487 | |
| 2488 | sense_size = MIN(sizeof(struct scsi_sense_data) |
| 2489 | - ahc_get_sense_residual(scb), |
| 2490 | sizeof(cmd->sense_buffer)); |
| 2491 | memcpy(cmd->sense_buffer, |
| 2492 | ahc_get_sense_buf(ahc, scb), sense_size); |
| 2493 | if (sense_size < sizeof(cmd->sense_buffer)) |
| 2494 | memset(&cmd->sense_buffer[sense_size], 0, |
| 2495 | sizeof(cmd->sense_buffer) - sense_size); |
| 2496 | cmd->result |= (DRIVER_SENSE << 24); |
| 2497 | #ifdef AHC_DEBUG |
| 2498 | if (ahc_debug & AHC_SHOW_SENSE) { |
| 2499 | int i; |
| 2500 | |
| 2501 | printf("Copied %d bytes of sense data:", |
| 2502 | sense_size); |
| 2503 | for (i = 0; i < sense_size; i++) { |
| 2504 | if ((i & 0xF) == 0) |
| 2505 | printf("\n"); |
| 2506 | printf("0x%x ", cmd->sense_buffer[i]); |
| 2507 | } |
| 2508 | printf("\n"); |
| 2509 | } |
| 2510 | #endif |
| 2511 | } |
| 2512 | break; |
| 2513 | } |
| 2514 | case SCSI_STATUS_QUEUE_FULL: |
| 2515 | { |
| 2516 | /* |
| 2517 | * By the time the core driver has returned this |
| 2518 | * command, all other commands that were queued |
| 2519 | * to us but not the device have been returned. |
| 2520 | * This ensures that dev->active is equal to |
| 2521 | * the number of commands actually queued to |
| 2522 | * the device. |
| 2523 | */ |
| 2524 | dev->tag_success_count = 0; |
| 2525 | if (dev->active != 0) { |
| 2526 | /* |
| 2527 | * Drop our opening count to the number |
| 2528 | * of commands currently outstanding. |
| 2529 | */ |
| 2530 | dev->openings = 0; |
| 2531 | /* |
| 2532 | ahc_print_path(ahc, scb); |
| 2533 | printf("Dropping tag count to %d\n", dev->active); |
| 2534 | */ |
| 2535 | if (dev->active == dev->tags_on_last_queuefull) { |
| 2536 | |
| 2537 | dev->last_queuefull_same_count++; |
| 2538 | /* |
| 2539 | * If we repeatedly see a queue full |
| 2540 | * at the same queue depth, this |
| 2541 | * device has a fixed number of tag |
| 2542 | * slots. Lock in this tag depth |
| 2543 | * so we stop seeing queue fulls from |
| 2544 | * this device. |
| 2545 | */ |
| 2546 | if (dev->last_queuefull_same_count |
| 2547 | == AHC_LOCK_TAGS_COUNT) { |
| 2548 | dev->maxtags = dev->active; |
| 2549 | ahc_print_path(ahc, scb); |
| 2550 | printf("Locking max tag count at %d\n", |
| 2551 | dev->active); |
| 2552 | } |
| 2553 | } else { |
| 2554 | dev->tags_on_last_queuefull = dev->active; |
| 2555 | dev->last_queuefull_same_count = 0; |
| 2556 | } |
| 2557 | ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); |
| 2558 | ahc_set_scsi_status(scb, SCSI_STATUS_OK); |
| 2559 | ahc_platform_set_tags(ahc, &devinfo, |
| 2560 | (dev->flags & AHC_DEV_Q_BASIC) |
| 2561 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); |
| 2562 | break; |
| 2563 | } |
| 2564 | /* |
| 2565 | * Drop down to a single opening, and treat this |
| 2566 | * as if the target returned BUSY SCSI status. |
| 2567 | */ |
| 2568 | dev->openings = 1; |
| 2569 | ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); |
| 2570 | ahc_platform_set_tags(ahc, &devinfo, |
| 2571 | (dev->flags & AHC_DEV_Q_BASIC) |
| 2572 | ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); |
| 2573 | /* FALLTHROUGH */ |
| 2574 | } |
| 2575 | case SCSI_STATUS_BUSY: |
| 2576 | { |
| 2577 | /* |
| 2578 | * Set a short timer to defer sending commands for |
| 2579 | * a bit since Linux will not delay in this case. |
| 2580 | */ |
| 2581 | if ((dev->flags & AHC_DEV_TIMER_ACTIVE) != 0) { |
| 2582 | printf("%s:%c:%d: Device Timer still active during " |
| 2583 | "busy processing\n", ahc_name(ahc), |
| 2584 | dev->target->channel, dev->target->target); |
| 2585 | break; |
| 2586 | } |
| 2587 | dev->flags |= AHC_DEV_TIMER_ACTIVE; |
| 2588 | dev->qfrozen++; |
| 2589 | init_timer(&dev->timer); |
| 2590 | dev->timer.data = (u_long)dev; |
| 2591 | dev->timer.expires = jiffies + (HZ/2); |
| 2592 | dev->timer.function = ahc_linux_dev_timed_unfreeze; |
| 2593 | add_timer(&dev->timer); |
| 2594 | break; |
| 2595 | } |
| 2596 | } |
| 2597 | } |
| 2598 | |
| 2599 | static void |
| 2600 | ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, Scsi_Cmnd *cmd) |
| 2601 | { |
| 2602 | /* |
| 2603 | * Typically, the complete queue has very few entries |
| 2604 | * queued to it before the queue is emptied by |
| 2605 | * ahc_linux_run_complete_queue, so sorting the entries |
| 2606 | * by generation number should be inexpensive. |
| 2607 | * We perform the sort so that commands that complete |
| 2608 | * with an error are retuned in the order origionally |
| 2609 | * queued to the controller so that any subsequent retries |
| 2610 | * are performed in order. The underlying ahc routines do |
| 2611 | * not guarantee the order that aborted commands will be |
| 2612 | * returned to us. |
| 2613 | */ |
| 2614 | struct ahc_completeq *completeq; |
| 2615 | struct ahc_cmd *list_cmd; |
| 2616 | struct ahc_cmd *acmd; |
| 2617 | |
| 2618 | /* |
| 2619 | * Map CAM error codes into Linux Error codes. We |
| 2620 | * avoid the conversion so that the DV code has the |
| 2621 | * full error information available when making |
| 2622 | * state change decisions. |
| 2623 | */ |
| cb62402 | 2005-04-17 18:03:20 -0500 | [diff] [blame] | 2624 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2625 | u_int new_status; |
| 2626 | |
| 2627 | switch (ahc_cmd_get_transaction_status(cmd)) { |
| 2628 | case CAM_REQ_INPROG: |
| 2629 | case CAM_REQ_CMP: |
| 2630 | case CAM_SCSI_STATUS_ERROR: |
| 2631 | new_status = DID_OK; |
| 2632 | break; |
| 2633 | case CAM_REQ_ABORTED: |
| 2634 | new_status = DID_ABORT; |
| 2635 | break; |
| 2636 | case CAM_BUSY: |
| 2637 | new_status = DID_BUS_BUSY; |
| 2638 | break; |
| 2639 | case CAM_REQ_INVALID: |
| 2640 | case CAM_PATH_INVALID: |
| 2641 | new_status = DID_BAD_TARGET; |
| 2642 | break; |
| 2643 | case CAM_SEL_TIMEOUT: |
| 2644 | new_status = DID_NO_CONNECT; |
| 2645 | break; |
| 2646 | case CAM_SCSI_BUS_RESET: |
| 2647 | case CAM_BDR_SENT: |
| 2648 | new_status = DID_RESET; |
| 2649 | break; |
| 2650 | case CAM_UNCOR_PARITY: |
| 2651 | new_status = DID_PARITY; |
| 2652 | break; |
| 2653 | case CAM_CMD_TIMEOUT: |
| 2654 | new_status = DID_TIME_OUT; |
| 2655 | break; |
| 2656 | case CAM_UA_ABORT: |
| 2657 | case CAM_REQ_CMP_ERR: |
| 2658 | case CAM_AUTOSENSE_FAIL: |
| 2659 | case CAM_NO_HBA: |
| 2660 | case CAM_DATA_RUN_ERR: |
| 2661 | case CAM_UNEXP_BUSFREE: |
| 2662 | case CAM_SEQUENCE_FAIL: |
| 2663 | case CAM_CCB_LEN_ERR: |
| 2664 | case CAM_PROVIDE_FAIL: |
| 2665 | case CAM_REQ_TERMIO: |
| 2666 | case CAM_UNREC_HBA_ERROR: |
| 2667 | case CAM_REQ_TOO_BIG: |
| 2668 | new_status = DID_ERROR; |
| 2669 | break; |
| 2670 | case CAM_REQUEUE_REQ: |
| 2671 | /* |
| 2672 | * If we want the request requeued, make sure there |
| 2673 | * are sufficent retries. In the old scsi error code, |
| 2674 | * we used to be able to specify a result code that |
| 2675 | * bypassed the retry count. Now we must use this |
| 2676 | * hack. We also "fake" a check condition with |
| 2677 | * a sense code of ABORTED COMMAND. This seems to |
| 2678 | * evoke a retry even if this command is being sent |
| 2679 | * via the eh thread. Ick! Ick! Ick! |
| 2680 | */ |
| 2681 | if (cmd->retries > 0) |
| 2682 | cmd->retries--; |
| 2683 | new_status = DID_OK; |
| 2684 | ahc_cmd_set_scsi_status(cmd, SCSI_STATUS_CHECK_COND); |
| 2685 | cmd->result |= (DRIVER_SENSE << 24); |
| 2686 | memset(cmd->sense_buffer, 0, |
| 2687 | sizeof(cmd->sense_buffer)); |
| 2688 | cmd->sense_buffer[0] = SSD_ERRCODE_VALID |
| 2689 | | SSD_CURRENT_ERROR; |
| 2690 | cmd->sense_buffer[2] = SSD_KEY_ABORTED_COMMAND; |
| 2691 | break; |
| 2692 | default: |
| 2693 | /* We should never get here */ |
| 2694 | new_status = DID_ERROR; |
| 2695 | break; |
| 2696 | } |
| 2697 | |
| 2698 | ahc_cmd_set_transaction_status(cmd, new_status); |
| 2699 | } |
| 2700 | |
| 2701 | completeq = &ahc->platform_data->completeq; |
| 2702 | list_cmd = TAILQ_FIRST(completeq); |
| 2703 | acmd = (struct ahc_cmd *)cmd; |
| 2704 | while (list_cmd != NULL |
| 2705 | && acmd_scsi_cmd(list_cmd).serial_number |
| 2706 | < acmd_scsi_cmd(acmd).serial_number) |
| 2707 | list_cmd = TAILQ_NEXT(list_cmd, acmd_links.tqe); |
| 2708 | if (list_cmd != NULL) |
| 2709 | TAILQ_INSERT_BEFORE(list_cmd, acmd, acmd_links.tqe); |
| 2710 | else |
| 2711 | TAILQ_INSERT_TAIL(completeq, acmd, acmd_links.tqe); |
| 2712 | } |
| 2713 | |
| 2714 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2715 | ahc_linux_sem_timeout(u_long arg) |
| 2716 | { |
| 2717 | struct ahc_softc *ahc; |
| 2718 | u_long s; |
| 2719 | |
| 2720 | ahc = (struct ahc_softc *)arg; |
| 2721 | |
| 2722 | ahc_lock(ahc, &s); |
| 2723 | if ((ahc->platform_data->flags & AHC_UP_EH_SEMAPHORE) != 0) { |
| 2724 | ahc->platform_data->flags &= ~AHC_UP_EH_SEMAPHORE; |
| 2725 | up(&ahc->platform_data->eh_sem); |
| 2726 | } |
| 2727 | ahc_unlock(ahc, &s); |
| 2728 | } |
| 2729 | |
| 2730 | static void |
| 2731 | ahc_linux_freeze_simq(struct ahc_softc *ahc) |
| 2732 | { |
| 2733 | ahc->platform_data->qfrozen++; |
| 2734 | if (ahc->platform_data->qfrozen == 1) { |
| 2735 | scsi_block_requests(ahc->platform_data->host); |
| 2736 | |
| 2737 | /* XXX What about Twin channels? */ |
| 2738 | ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, |
| 2739 | CAM_LUN_WILDCARD, SCB_LIST_NULL, |
| 2740 | ROLE_INITIATOR, CAM_REQUEUE_REQ); |
| 2741 | } |
| 2742 | } |
| 2743 | |
| 2744 | static void |
| 2745 | ahc_linux_release_simq(u_long arg) |
| 2746 | { |
| 2747 | struct ahc_softc *ahc; |
| 2748 | u_long s; |
| 2749 | int unblock_reqs; |
| 2750 | |
| 2751 | ahc = (struct ahc_softc *)arg; |
| 2752 | |
| 2753 | unblock_reqs = 0; |
| 2754 | ahc_lock(ahc, &s); |
| 2755 | if (ahc->platform_data->qfrozen > 0) |
| 2756 | ahc->platform_data->qfrozen--; |
| 2757 | if (ahc->platform_data->qfrozen == 0) |
| 2758 | unblock_reqs = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2759 | ahc_unlock(ahc, &s); |
| 2760 | /* |
| 2761 | * There is still a race here. The mid-layer |
| 2762 | * should keep its own freeze count and use |
| 2763 | * a bottom half handler to run the queues |
| 2764 | * so we can unblock with our own lock held. |
| 2765 | */ |
| 2766 | if (unblock_reqs) |
| 2767 | scsi_unblock_requests(ahc->platform_data->host); |
| 2768 | } |
| 2769 | |
| 2770 | static void |
| 2771 | ahc_linux_dev_timed_unfreeze(u_long arg) |
| 2772 | { |
| 2773 | struct ahc_linux_device *dev; |
| 2774 | struct ahc_softc *ahc; |
| 2775 | u_long s; |
| 2776 | |
| 2777 | dev = (struct ahc_linux_device *)arg; |
| 2778 | ahc = dev->target->ahc; |
| 2779 | ahc_lock(ahc, &s); |
| 2780 | dev->flags &= ~AHC_DEV_TIMER_ACTIVE; |
| 2781 | if (dev->qfrozen > 0) |
| 2782 | dev->qfrozen--; |
James Bottomley | e4e360c | 2005-05-16 16:39:38 -0500 | [diff] [blame^] | 2783 | if (dev->active == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2784 | __ahc_linux_free_device(ahc, dev); |
| 2785 | ahc_unlock(ahc, &s); |
| 2786 | } |
| 2787 | |
| 2788 | static int |
| 2789 | ahc_linux_queue_recovery_cmd(Scsi_Cmnd *cmd, scb_flag flag) |
| 2790 | { |
| 2791 | struct ahc_softc *ahc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2792 | struct ahc_linux_device *dev; |
| 2793 | struct scb *pending_scb; |
| 2794 | u_long s; |
| 2795 | u_int saved_scbptr; |
| 2796 | u_int active_scb_index; |
| 2797 | u_int last_phase; |
| 2798 | u_int saved_scsiid; |
| 2799 | u_int cdb_byte; |
| 2800 | int retval; |
| 2801 | int was_paused; |
| 2802 | int paused; |
| 2803 | int wait; |
| 2804 | int disconnected; |
| 2805 | |
| 2806 | pending_scb = NULL; |
| 2807 | paused = FALSE; |
| 2808 | wait = FALSE; |
| 2809 | ahc = *(struct ahc_softc **)cmd->device->host->hostdata; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2810 | |
| 2811 | printf("%s:%d:%d:%d: Attempting to queue a%s message\n", |
| 2812 | ahc_name(ahc), cmd->device->channel, |
| 2813 | cmd->device->id, cmd->device->lun, |
| 2814 | flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); |
| 2815 | |
| 2816 | printf("CDB:"); |
| 2817 | for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) |
| 2818 | printf(" 0x%x", cmd->cmnd[cdb_byte]); |
| 2819 | printf("\n"); |
| 2820 | |
| 2821 | /* |
| 2822 | * In all versions of Linux, we have to work around |
| 2823 | * a major flaw in how the mid-layer is locked down |
| 2824 | * if we are to sleep successfully in our error handler |
| 2825 | * while allowing our interrupt handler to run. Since |
| 2826 | * the midlayer acquires either the io_request_lock or |
| 2827 | * our lock prior to calling us, we must use the |
| 2828 | * spin_unlock_irq() method for unlocking our lock. |
| 2829 | * This will force interrupts to be enabled on the |
| 2830 | * current CPU. Since the EH thread should not have |
| 2831 | * been running with CPU interrupts disabled other than |
| 2832 | * by acquiring either the io_request_lock or our own |
| 2833 | * lock, this *should* be safe. |
| 2834 | */ |
| 2835 | ahc_midlayer_entrypoint_lock(ahc, &s); |
| 2836 | |
| 2837 | /* |
| 2838 | * First determine if we currently own this command. |
| 2839 | * Start by searching the device queue. If not found |
| 2840 | * there, check the pending_scb list. If not found |
| 2841 | * at all, and the system wanted us to just abort the |
| 2842 | * command, return success. |
| 2843 | */ |
| 2844 | dev = ahc_linux_get_device(ahc, cmd->device->channel, cmd->device->id, |
| 2845 | cmd->device->lun, /*alloc*/FALSE); |
| 2846 | |
| 2847 | if (dev == NULL) { |
| 2848 | /* |
| 2849 | * No target device for this command exists, |
| 2850 | * so we must not still own the command. |
| 2851 | */ |
| 2852 | printf("%s:%d:%d:%d: Is not an active device\n", |
| 2853 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
| 2854 | cmd->device->lun); |
| 2855 | retval = SUCCESS; |
| 2856 | goto no_cmd; |
| 2857 | } |
| 2858 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2859 | if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 |
| 2860 | && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, |
| 2861 | cmd->device->channel + 'A', |
| 2862 | cmd->device->lun, |
| 2863 | CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { |
| 2864 | printf("%s:%d:%d:%d: Command found on untagged queue\n", |
| 2865 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
| 2866 | cmd->device->lun); |
| 2867 | retval = SUCCESS; |
| 2868 | goto done; |
| 2869 | } |
| 2870 | |
| 2871 | /* |
| 2872 | * See if we can find a matching cmd in the pending list. |
| 2873 | */ |
| 2874 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { |
| 2875 | if (pending_scb->io_ctx == cmd) |
| 2876 | break; |
| 2877 | } |
| 2878 | |
| 2879 | if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { |
| 2880 | |
| 2881 | /* Any SCB for this device will do for a target reset */ |
| 2882 | LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { |
| 2883 | if (ahc_match_scb(ahc, pending_scb, cmd->device->id, |
| 2884 | cmd->device->channel + 'A', |
| 2885 | CAM_LUN_WILDCARD, |
| 2886 | SCB_LIST_NULL, ROLE_INITIATOR) == 0) |
| 2887 | break; |
| 2888 | } |
| 2889 | } |
| 2890 | |
| 2891 | if (pending_scb == NULL) { |
| 2892 | printf("%s:%d:%d:%d: Command not found\n", |
| 2893 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
| 2894 | cmd->device->lun); |
| 2895 | goto no_cmd; |
| 2896 | } |
| 2897 | |
| 2898 | if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { |
| 2899 | /* |
| 2900 | * We can't queue two recovery actions using the same SCB |
| 2901 | */ |
| 2902 | retval = FAILED; |
| 2903 | goto done; |
| 2904 | } |
| 2905 | |
| 2906 | /* |
| 2907 | * Ensure that the card doesn't do anything |
| 2908 | * behind our back and that we didn't "just" miss |
| 2909 | * an interrupt that would affect this cmd. |
| 2910 | */ |
| 2911 | was_paused = ahc_is_paused(ahc); |
| 2912 | ahc_pause_and_flushwork(ahc); |
| 2913 | paused = TRUE; |
| 2914 | |
| 2915 | if ((pending_scb->flags & SCB_ACTIVE) == 0) { |
| 2916 | printf("%s:%d:%d:%d: Command already completed\n", |
| 2917 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
| 2918 | cmd->device->lun); |
| 2919 | goto no_cmd; |
| 2920 | } |
| 2921 | |
| 2922 | printf("%s: At time of recovery, card was %spaused\n", |
| 2923 | ahc_name(ahc), was_paused ? "" : "not "); |
| 2924 | ahc_dump_card_state(ahc); |
| 2925 | |
| 2926 | disconnected = TRUE; |
| 2927 | if (flag == SCB_ABORT) { |
| 2928 | if (ahc_search_qinfifo(ahc, cmd->device->id, |
| 2929 | cmd->device->channel + 'A', |
| 2930 | cmd->device->lun, |
| 2931 | pending_scb->hscb->tag, |
| 2932 | ROLE_INITIATOR, CAM_REQ_ABORTED, |
| 2933 | SEARCH_COMPLETE) > 0) { |
| 2934 | printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", |
| 2935 | ahc_name(ahc), cmd->device->channel, |
| 2936 | cmd->device->id, cmd->device->lun); |
| 2937 | retval = SUCCESS; |
| 2938 | goto done; |
| 2939 | } |
| 2940 | } else if (ahc_search_qinfifo(ahc, cmd->device->id, |
| 2941 | cmd->device->channel + 'A', |
| 2942 | cmd->device->lun, pending_scb->hscb->tag, |
| 2943 | ROLE_INITIATOR, /*status*/0, |
| 2944 | SEARCH_COUNT) > 0) { |
| 2945 | disconnected = FALSE; |
| 2946 | } |
| 2947 | |
| 2948 | if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { |
| 2949 | struct scb *bus_scb; |
| 2950 | |
| 2951 | bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); |
| 2952 | if (bus_scb == pending_scb) |
| 2953 | disconnected = FALSE; |
| 2954 | else if (flag != SCB_ABORT |
| 2955 | && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid |
| 2956 | && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) |
| 2957 | disconnected = FALSE; |
| 2958 | } |
| 2959 | |
| 2960 | /* |
| 2961 | * At this point, pending_scb is the scb associated with the |
| 2962 | * passed in command. That command is currently active on the |
| 2963 | * bus, is in the disconnected state, or we're hoping to find |
| 2964 | * a command for the same target active on the bus to abuse to |
| 2965 | * send a BDR. Queue the appropriate message based on which of |
| 2966 | * these states we are in. |
| 2967 | */ |
| 2968 | last_phase = ahc_inb(ahc, LASTPHASE); |
| 2969 | saved_scbptr = ahc_inb(ahc, SCBPTR); |
| 2970 | active_scb_index = ahc_inb(ahc, SCB_TAG); |
| 2971 | saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); |
| 2972 | if (last_phase != P_BUSFREE |
| 2973 | && (pending_scb->hscb->tag == active_scb_index |
| 2974 | || (flag == SCB_DEVICE_RESET |
| 2975 | && SCSIID_TARGET(ahc, saved_scsiid) == cmd->device->id))) { |
| 2976 | |
| 2977 | /* |
| 2978 | * We're active on the bus, so assert ATN |
| 2979 | * and hope that the target responds. |
| 2980 | */ |
| 2981 | pending_scb = ahc_lookup_scb(ahc, active_scb_index); |
| 2982 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; |
| 2983 | ahc_outb(ahc, MSG_OUT, HOST_MSG); |
| 2984 | ahc_outb(ahc, SCSISIGO, last_phase|ATNO); |
| 2985 | printf("%s:%d:%d:%d: Device is active, asserting ATN\n", |
| 2986 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
| 2987 | cmd->device->lun); |
| 2988 | wait = TRUE; |
| 2989 | } else if (disconnected) { |
| 2990 | |
| 2991 | /* |
| 2992 | * Actually re-queue this SCB in an attempt |
| 2993 | * to select the device before it reconnects. |
| 2994 | * In either case (selection or reselection), |
| 2995 | * we will now issue the approprate message |
| 2996 | * to the timed-out device. |
| 2997 | * |
| 2998 | * Set the MK_MESSAGE control bit indicating |
| 2999 | * that we desire to send a message. We |
| 3000 | * also set the disconnected flag since |
| 3001 | * in the paging case there is no guarantee |
| 3002 | * that our SCB control byte matches the |
| 3003 | * version on the card. We don't want the |
| 3004 | * sequencer to abort the command thinking |
| 3005 | * an unsolicited reselection occurred. |
| 3006 | */ |
| 3007 | pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; |
| 3008 | pending_scb->flags |= SCB_RECOVERY_SCB|flag; |
| 3009 | |
| 3010 | /* |
| 3011 | * Remove any cached copy of this SCB in the |
| 3012 | * disconnected list in preparation for the |
| 3013 | * queuing of our abort SCB. We use the |
| 3014 | * same element in the SCB, SCB_NEXT, for |
| 3015 | * both the qinfifo and the disconnected list. |
| 3016 | */ |
| 3017 | ahc_search_disc_list(ahc, cmd->device->id, |
| 3018 | cmd->device->channel + 'A', |
| 3019 | cmd->device->lun, pending_scb->hscb->tag, |
| 3020 | /*stop_on_first*/TRUE, |
| 3021 | /*remove*/TRUE, |
| 3022 | /*save_state*/FALSE); |
| 3023 | |
| 3024 | /* |
| 3025 | * In the non-paging case, the sequencer will |
| 3026 | * never re-reference the in-core SCB. |
| 3027 | * To make sure we are notified during |
| 3028 | * reslection, set the MK_MESSAGE flag in |
| 3029 | * the card's copy of the SCB. |
| 3030 | */ |
| 3031 | if ((ahc->flags & AHC_PAGESCBS) == 0) { |
| 3032 | ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); |
| 3033 | ahc_outb(ahc, SCB_CONTROL, |
| 3034 | ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); |
| 3035 | } |
| 3036 | |
| 3037 | /* |
| 3038 | * Clear out any entries in the QINFIFO first |
| 3039 | * so we are the next SCB for this target |
| 3040 | * to run. |
| 3041 | */ |
| 3042 | ahc_search_qinfifo(ahc, cmd->device->id, |
| 3043 | cmd->device->channel + 'A', |
| 3044 | cmd->device->lun, SCB_LIST_NULL, |
| 3045 | ROLE_INITIATOR, CAM_REQUEUE_REQ, |
| 3046 | SEARCH_COMPLETE); |
| 3047 | ahc_qinfifo_requeue_tail(ahc, pending_scb); |
| 3048 | ahc_outb(ahc, SCBPTR, saved_scbptr); |
| 3049 | ahc_print_path(ahc, pending_scb); |
| 3050 | printf("Device is disconnected, re-queuing SCB\n"); |
| 3051 | wait = TRUE; |
| 3052 | } else { |
| 3053 | printf("%s:%d:%d:%d: Unable to deliver message\n", |
| 3054 | ahc_name(ahc), cmd->device->channel, cmd->device->id, |
| 3055 | cmd->device->lun); |
| 3056 | retval = FAILED; |
| 3057 | goto done; |
| 3058 | } |
| 3059 | |
| 3060 | no_cmd: |
| 3061 | /* |
| 3062 | * Our assumption is that if we don't have the command, no |
| 3063 | * recovery action was required, so we return success. Again, |
| 3064 | * the semantics of the mid-layer recovery engine are not |
| 3065 | * well defined, so this may change in time. |
| 3066 | */ |
| 3067 | retval = SUCCESS; |
| 3068 | done: |
| 3069 | if (paused) |
| 3070 | ahc_unpause(ahc); |
| 3071 | if (wait) { |
| 3072 | struct timer_list timer; |
| 3073 | int ret; |
| 3074 | |
| 3075 | ahc->platform_data->flags |= AHC_UP_EH_SEMAPHORE; |
| 3076 | spin_unlock_irq(&ahc->platform_data->spin_lock); |
| 3077 | init_timer(&timer); |
| 3078 | timer.data = (u_long)ahc; |
| 3079 | timer.expires = jiffies + (5 * HZ); |
| 3080 | timer.function = ahc_linux_sem_timeout; |
| 3081 | add_timer(&timer); |
| 3082 | printf("Recovery code sleeping\n"); |
| 3083 | down(&ahc->platform_data->eh_sem); |
| 3084 | printf("Recovery code awake\n"); |
| 3085 | ret = del_timer_sync(&timer); |
| 3086 | if (ret == 0) { |
| 3087 | printf("Timer Expired\n"); |
| 3088 | retval = FAILED; |
| 3089 | } |
| 3090 | spin_lock_irq(&ahc->platform_data->spin_lock); |
| 3091 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3092 | ahc_linux_run_complete_queue(ahc); |
| 3093 | ahc_midlayer_entrypoint_unlock(ahc, &s); |
| 3094 | return (retval); |
| 3095 | } |
| 3096 | |
| 3097 | void |
| 3098 | ahc_platform_dump_card_state(struct ahc_softc *ahc) |
| 3099 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3100 | } |
| 3101 | |
| 3102 | static void ahc_linux_exit(void); |
| 3103 | |
James Bottomley | fad01ef | 2005-05-08 16:00:15 -0500 | [diff] [blame] | 3104 | static void ahc_linux_get_width(struct scsi_target *starget) |
| 3105 | { |
| 3106 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 3107 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 3108 | struct ahc_tmode_tstate *tstate; |
| 3109 | struct ahc_initiator_tinfo *tinfo |
| 3110 | = ahc_fetch_transinfo(ahc, |
| 3111 | starget->channel + 'A', |
| 3112 | shost->this_id, starget->id, &tstate); |
| 3113 | spi_width(starget) = tinfo->curr.width; |
| 3114 | } |
| 3115 | |
| 3116 | static void ahc_linux_set_width(struct scsi_target *starget, int width) |
| 3117 | { |
| 3118 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 3119 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 3120 | struct ahc_devinfo devinfo; |
| 3121 | unsigned long flags; |
| 3122 | |
| 3123 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 3124 | starget->channel + 'A', ROLE_INITIATOR); |
| 3125 | ahc_lock(ahc, &flags); |
| 3126 | ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); |
| 3127 | ahc_unlock(ahc, &flags); |
| 3128 | } |
| 3129 | |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 3130 | static void ahc_linux_get_period(struct scsi_target *starget) |
| 3131 | { |
| 3132 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 3133 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 3134 | struct ahc_tmode_tstate *tstate; |
| 3135 | struct ahc_initiator_tinfo *tinfo |
| 3136 | = ahc_fetch_transinfo(ahc, |
| 3137 | starget->channel + 'A', |
| 3138 | shost->this_id, starget->id, &tstate); |
| 3139 | spi_period(starget) = tinfo->curr.period; |
| 3140 | } |
| 3141 | |
| 3142 | static void ahc_linux_set_period(struct scsi_target *starget, int period) |
| 3143 | { |
| 3144 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 3145 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 3146 | struct ahc_tmode_tstate *tstate; |
| 3147 | struct ahc_initiator_tinfo *tinfo |
| 3148 | = ahc_fetch_transinfo(ahc, |
| 3149 | starget->channel + 'A', |
| 3150 | shost->this_id, starget->id, &tstate); |
| 3151 | struct ahc_devinfo devinfo; |
| 3152 | unsigned int ppr_options = tinfo->curr.ppr_options; |
| 3153 | unsigned long flags; |
| 3154 | unsigned long offset = tinfo->curr.offset; |
| 3155 | struct ahc_syncrate *syncrate; |
| 3156 | |
| 3157 | if (offset == 0) |
| 3158 | offset = MAX_OFFSET; |
| 3159 | |
| 3160 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 3161 | starget->channel + 'A', ROLE_INITIATOR); |
James Bottomley | fad01ef | 2005-05-08 16:00:15 -0500 | [diff] [blame] | 3162 | |
| 3163 | /* all PPR requests apart from QAS require wide transfers */ |
| 3164 | if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { |
| 3165 | ahc_linux_get_width(starget); |
| 3166 | if (spi_width(starget) == 0) |
| 3167 | ppr_options &= MSG_EXT_PPR_QAS_REQ; |
| 3168 | } |
| 3169 | |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 3170 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
| 3171 | ahc_lock(ahc, &flags); |
| 3172 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, |
| 3173 | ppr_options, AHC_TRANS_GOAL, FALSE); |
| 3174 | ahc_unlock(ahc, &flags); |
| 3175 | } |
| 3176 | |
| 3177 | static void ahc_linux_get_offset(struct scsi_target *starget) |
| 3178 | { |
| 3179 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 3180 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 3181 | struct ahc_tmode_tstate *tstate; |
| 3182 | struct ahc_initiator_tinfo *tinfo |
| 3183 | = ahc_fetch_transinfo(ahc, |
| 3184 | starget->channel + 'A', |
| 3185 | shost->this_id, starget->id, &tstate); |
| 3186 | spi_offset(starget) = tinfo->curr.offset; |
| 3187 | } |
| 3188 | |
| 3189 | static void ahc_linux_set_offset(struct scsi_target *starget, int offset) |
| 3190 | { |
| 3191 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 3192 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 3193 | struct ahc_tmode_tstate *tstate; |
| 3194 | struct ahc_initiator_tinfo *tinfo |
| 3195 | = ahc_fetch_transinfo(ahc, |
| 3196 | starget->channel + 'A', |
| 3197 | shost->this_id, starget->id, &tstate); |
| 3198 | struct ahc_devinfo devinfo; |
| 3199 | unsigned int ppr_options = 0; |
| 3200 | unsigned int period = 0; |
| 3201 | unsigned long flags; |
| 3202 | struct ahc_syncrate *syncrate = NULL; |
| 3203 | |
| 3204 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 3205 | starget->channel + 'A', ROLE_INITIATOR); |
| 3206 | if (offset != 0) { |
| 3207 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
| 3208 | period = tinfo->curr.period; |
| 3209 | ppr_options = tinfo->curr.ppr_options; |
| 3210 | } |
| 3211 | ahc_lock(ahc, &flags); |
| 3212 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, |
| 3213 | ppr_options, AHC_TRANS_GOAL, FALSE); |
| 3214 | ahc_unlock(ahc, &flags); |
| 3215 | } |
| 3216 | |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 3217 | static void ahc_linux_get_dt(struct scsi_target *starget) |
| 3218 | { |
| 3219 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 3220 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 3221 | struct ahc_tmode_tstate *tstate; |
| 3222 | struct ahc_initiator_tinfo *tinfo |
| 3223 | = ahc_fetch_transinfo(ahc, |
| 3224 | starget->channel + 'A', |
| 3225 | shost->this_id, starget->id, &tstate); |
| 3226 | spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ; |
| 3227 | } |
| 3228 | |
| 3229 | static void ahc_linux_set_dt(struct scsi_target *starget, int dt) |
| 3230 | { |
| 3231 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 3232 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 3233 | struct ahc_tmode_tstate *tstate; |
| 3234 | struct ahc_initiator_tinfo *tinfo |
| 3235 | = ahc_fetch_transinfo(ahc, |
| 3236 | starget->channel + 'A', |
| 3237 | shost->this_id, starget->id, &tstate); |
| 3238 | struct ahc_devinfo devinfo; |
| 3239 | unsigned int ppr_options = tinfo->curr.ppr_options |
| 3240 | & ~MSG_EXT_PPR_DT_REQ; |
| 3241 | unsigned int period = tinfo->curr.period; |
| 3242 | unsigned long flags; |
| 3243 | struct ahc_syncrate *syncrate; |
| 3244 | |
| 3245 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 3246 | starget->channel + 'A', ROLE_INITIATOR); |
James Bottomley | fad01ef | 2005-05-08 16:00:15 -0500 | [diff] [blame] | 3247 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 3248 | ahc_lock(ahc, &flags); |
| 3249 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset, |
| 3250 | ppr_options, AHC_TRANS_GOAL, FALSE); |
| 3251 | ahc_unlock(ahc, &flags); |
| 3252 | } |
| 3253 | |
| 3254 | static void ahc_linux_get_qas(struct scsi_target *starget) |
| 3255 | { |
| 3256 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 3257 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 3258 | struct ahc_tmode_tstate *tstate; |
| 3259 | struct ahc_initiator_tinfo *tinfo |
| 3260 | = ahc_fetch_transinfo(ahc, |
| 3261 | starget->channel + 'A', |
| 3262 | shost->this_id, starget->id, &tstate); |
| 3263 | spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ; |
| 3264 | } |
| 3265 | |
| 3266 | static void ahc_linux_set_qas(struct scsi_target *starget, int qas) |
| 3267 | { |
| 3268 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 3269 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 3270 | struct ahc_tmode_tstate *tstate; |
| 3271 | struct ahc_initiator_tinfo *tinfo |
| 3272 | = ahc_fetch_transinfo(ahc, |
| 3273 | starget->channel + 'A', |
| 3274 | shost->this_id, starget->id, &tstate); |
| 3275 | struct ahc_devinfo devinfo; |
| 3276 | unsigned int ppr_options = tinfo->curr.ppr_options |
| 3277 | & ~MSG_EXT_PPR_QAS_REQ; |
| 3278 | unsigned int period = tinfo->curr.period; |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 3279 | unsigned long flags; |
| 3280 | struct ahc_syncrate *syncrate; |
| 3281 | |
| 3282 | if (qas) |
| 3283 | ppr_options |= MSG_EXT_PPR_QAS_REQ; |
| 3284 | |
| 3285 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 3286 | starget->channel + 'A', ROLE_INITIATOR); |
James Bottomley | fad01ef | 2005-05-08 16:00:15 -0500 | [diff] [blame] | 3287 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 3288 | ahc_lock(ahc, &flags); |
| 3289 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset, |
| 3290 | ppr_options, AHC_TRANS_GOAL, FALSE); |
| 3291 | ahc_unlock(ahc, &flags); |
| 3292 | } |
| 3293 | |
| 3294 | static void ahc_linux_get_iu(struct scsi_target *starget) |
| 3295 | { |
| 3296 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 3297 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 3298 | struct ahc_tmode_tstate *tstate; |
| 3299 | struct ahc_initiator_tinfo *tinfo |
| 3300 | = ahc_fetch_transinfo(ahc, |
| 3301 | starget->channel + 'A', |
| 3302 | shost->this_id, starget->id, &tstate); |
| 3303 | spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ; |
| 3304 | } |
| 3305 | |
| 3306 | static void ahc_linux_set_iu(struct scsi_target *starget, int iu) |
| 3307 | { |
| 3308 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); |
| 3309 | struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); |
| 3310 | struct ahc_tmode_tstate *tstate; |
| 3311 | struct ahc_initiator_tinfo *tinfo |
| 3312 | = ahc_fetch_transinfo(ahc, |
| 3313 | starget->channel + 'A', |
| 3314 | shost->this_id, starget->id, &tstate); |
| 3315 | struct ahc_devinfo devinfo; |
| 3316 | unsigned int ppr_options = tinfo->curr.ppr_options |
| 3317 | & ~MSG_EXT_PPR_IU_REQ; |
| 3318 | unsigned int period = tinfo->curr.period; |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 3319 | unsigned long flags; |
| 3320 | struct ahc_syncrate *syncrate; |
| 3321 | |
| 3322 | if (iu) |
| 3323 | ppr_options |= MSG_EXT_PPR_IU_REQ; |
| 3324 | |
| 3325 | ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, |
| 3326 | starget->channel + 'A', ROLE_INITIATOR); |
James Bottomley | fad01ef | 2005-05-08 16:00:15 -0500 | [diff] [blame] | 3327 | syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 3328 | ahc_lock(ahc, &flags); |
| 3329 | ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->curr.offset, |
| 3330 | ppr_options, AHC_TRANS_GOAL, FALSE); |
| 3331 | ahc_unlock(ahc, &flags); |
| 3332 | } |
| 3333 | |
| 3334 | static struct spi_function_template ahc_linux_transport_functions = { |
| 3335 | .get_offset = ahc_linux_get_offset, |
| 3336 | .set_offset = ahc_linux_set_offset, |
| 3337 | .show_offset = 1, |
| 3338 | .get_period = ahc_linux_get_period, |
| 3339 | .set_period = ahc_linux_set_period, |
| 3340 | .show_period = 1, |
| 3341 | .get_width = ahc_linux_get_width, |
| 3342 | .set_width = ahc_linux_set_width, |
| 3343 | .show_width = 1, |
| 3344 | .get_dt = ahc_linux_get_dt, |
| 3345 | .set_dt = ahc_linux_set_dt, |
| 3346 | .show_dt = 1, |
| 3347 | .get_iu = ahc_linux_get_iu, |
| 3348 | .set_iu = ahc_linux_set_iu, |
| 3349 | .show_iu = 1, |
| 3350 | .get_qas = ahc_linux_get_qas, |
| 3351 | .set_qas = ahc_linux_set_qas, |
| 3352 | .show_qas = 1, |
| 3353 | }; |
| 3354 | |
| 3355 | |
| 3356 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3357 | static int __init |
| 3358 | ahc_linux_init(void) |
| 3359 | { |
| 3360 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 3361 | ahc_linux_transport_template = spi_attach_transport(&ahc_linux_transport_functions); |
| 3362 | if (!ahc_linux_transport_template) |
| 3363 | return -ENODEV; |
James Bottomley | 858eaca16 | 2005-04-21 07:35:45 -0700 | [diff] [blame] | 3364 | if (ahc_linux_detect(&aic7xxx_driver_template)) |
| 3365 | return 0; |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 3366 | spi_release_transport(ahc_linux_transport_template); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3367 | ahc_linux_exit(); |
| 3368 | return -ENODEV; |
| 3369 | #else |
| 3370 | scsi_register_module(MODULE_SCSI_HA, &aic7xxx_driver_template); |
| 3371 | if (aic7xxx_driver_template.present == 0) { |
| 3372 | scsi_unregister_module(MODULE_SCSI_HA, |
| 3373 | &aic7xxx_driver_template); |
| 3374 | return (-ENODEV); |
| 3375 | } |
| 3376 | |
| 3377 | return (0); |
| 3378 | #endif |
| 3379 | } |
| 3380 | |
| 3381 | static void |
| 3382 | ahc_linux_exit(void) |
| 3383 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3384 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) |
| 3385 | /* |
| 3386 | * In 2.4 we have to unregister from the PCI core _after_ |
| 3387 | * unregistering from the scsi midlayer to avoid dangling |
| 3388 | * references. |
| 3389 | */ |
| 3390 | scsi_unregister_module(MODULE_SCSI_HA, &aic7xxx_driver_template); |
| 3391 | #endif |
| 3392 | ahc_linux_pci_exit(); |
| 3393 | ahc_linux_eisa_exit(); |
| 92d161c | 2005-04-17 16:59:33 -0500 | [diff] [blame] | 3394 | spi_release_transport(ahc_linux_transport_template); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3395 | } |
| 3396 | |
| 3397 | module_init(ahc_linux_init); |
| 3398 | module_exit(ahc_linux_exit); |