1/* 2 * Adaptec AIC7xxx device driver for Linux. 3 * 4 * $Id: aic7xxx_osm.c,v 1.1.1.1 2007/08/03 18:52:58 Exp $ 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> 125 126static struct scsi_transport_template *ahc_linux_transport_template = NULL; 127 128#include <linux/init.h> /* __setup */ 129#include <linux/mm.h> /* For fetching system memory size */ 130#include <linux/blkdev.h> /* For block_size() */ 131#include <linux/delay.h> /* For ssleep/msleep */ 132 133 134/* 135 * Set this to the delay in seconds after SCSI bus reset. 136 * Note, we honor this only for the initial bus reset. 137 * The scsi error recovery code performs its own bus settle 138 * delay handling for error recovery actions. 139 */ 140#ifdef CONFIG_AIC7XXX_RESET_DELAY_MS 141#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS 142#else 143#define AIC7XXX_RESET_DELAY 5000 144#endif 145 146/* 147 * Control collection of SCSI transfer statistics for the /proc filesystem. 148 * 149 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below. 150 * NOTE: This does affect performance since it has to maintain statistics. 151 */ 152#ifdef CONFIG_AIC7XXX_PROC_STATS 153#define AIC7XXX_PROC_STATS 154#endif 155 156/* 157 * To change the default number of tagged transactions allowed per-device, 158 * add a line to the lilo.conf file like: 159 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 160 * which will result in the first four devices on the first two 161 * controllers being set to a tagged queue depth of 32. 162 * 163 * The tag_commands is an array of 16 to allow for wide and twin adapters. 164 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 165 * for channel 1. 166 */ 167typedef struct { 168 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ 169} adapter_tag_info_t; 170 171/* 172 * Modify this as you see fit for your system. 173 * 174 * 0 tagged queuing disabled 175 * 1 <= n <= 253 n == max tags ever dispatched. 176 * 177 * The driver will throttle the number of commands dispatched to a 178 * device if it returns queue full. For devices with a fixed maximum 179 * queue depth, the driver will eventually determine this depth and 180 * lock it in (a console message is printed to indicate that a lock 181 * has occurred). On some devices, queue full is returned for a temporary 182 * resource shortage. These devices will return queue full at varying 183 * depths. The driver will throttle back when the queue fulls occur and 184 * attempt to slowly increase the depth over time as the device recovers 185 * from the resource shortage. 186 * 187 * In this example, the first line will disable tagged queueing for all 188 * the devices on the first probed aic7xxx adapter. 189 * 190 * The second line enables tagged queueing with 4 commands/LUN for IDs 191 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 192 * driver to attempt to use up to 64 tags for ID 1. 193 * 194 * The third line is the same as the first line. 195 * 196 * The fourth line disables tagged queueing for devices 0 and 3. It 197 * enables tagged queueing for the other IDs, with 16 commands/LUN 198 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 199 * IDs 2, 5-7, and 9-15. 200 */ 201 202/* 203 * NOTE: The below structure is for reference only, the actual structure 204 * to modify in order to change things is just below this comment block. 205adapter_tag_info_t aic7xxx_tag_info[] = 206{ 207 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 208 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 209 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 210 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 211}; 212*/ 213 214#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE 215#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE 216#else 217#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE 218#endif 219 220#define AIC7XXX_CONFIGED_TAG_COMMANDS { \ 221 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 222 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 223 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 224 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 225 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 226 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 227 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE, \ 228 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \ 229} 230 231/* 232 * By default, use the number of commands specified by 233 * the users kernel configuration. 234 */ 235static adapter_tag_info_t aic7xxx_tag_info[] = 236{ 237 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 238 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 239 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 240 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 241 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 242 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 243 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 244 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 245 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 246 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 247 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 248 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 249 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 250 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 251 {AIC7XXX_CONFIGED_TAG_COMMANDS}, 252 {AIC7XXX_CONFIGED_TAG_COMMANDS} 253}; 254 255/* 256 * There should be a specific return value for this in scsi.h, but 257 * it seems that most drivers ignore it. 258 */ 259#define DID_UNDERFLOW DID_ERROR 260 261void 262ahc_print_path(struct ahc_softc *ahc, struct scb *scb) 263{ 264 printk("(scsi%d:%c:%d:%d): ", 265 ahc->platform_data->host->host_no, 266 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', 267 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, 268 scb != NULL ? SCB_GET_LUN(scb) : -1); 269} 270 271 272/* 273 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 274 * has no effect on any later resets that might occur due to things like 275 * SCSI bus timeouts. 276 */ 277static uint32_t aic7xxx_no_reset; 278 279/* 280 * Should we force EXTENDED translation on a controller. 281 * 0 == Use whatever is in the SEEPROM or default to off 282 * 1 == Use whatever is in the SEEPROM or default to on 283 */ 284static uint32_t aic7xxx_extended; 285 286/* 287 * PCI bus parity checking of the Adaptec controllers. This is somewhat 288 * dubious at best. To my knowledge, this option has never actually 289 * solved a PCI parity problem, but on certain machines with broken PCI 290 * chipset configurations where stray PCI transactions with bad parity are 291 * the norm rather than the exception, the error messages can be overwelming. 292 * It's included in the driver for completeness. 293 * 0 = Shut off PCI parity check 294 * non-0 = reverse polarity pci parity checking 295 */ 296static uint32_t aic7xxx_pci_parity = ~0; 297 298/* 299 * There are lots of broken chipsets in the world. Some of them will 300 * violate the PCI spec when we issue byte sized memory writes to our 301 * controller. I/O mapped register access, if allowed by the given 302 * platform, will work in almost all cases. 303 */ 304uint32_t aic7xxx_allow_memio = ~0; 305 306/* 307 * So that we can set how long each device is given as a selection timeout. 308 * The table of values goes like this: 309 * 0 - 256ms 310 * 1 - 128ms 311 * 2 - 64ms 312 * 3 - 32ms 313 * We default to 256ms because some older devices need a longer time 314 * to respond to initial selection. 315 */ 316static uint32_t aic7xxx_seltime; 317 318/* 319 * Certain devices do not perform any aging on commands. Should the 320 * device be saturated by commands in one portion of the disk, it is 321 * possible for transactions on far away sectors to never be serviced. 322 * To handle these devices, we can periodically send an ordered tag to 323 * force all outstanding transactions to be serviced prior to a new 324 * transaction. 325 */ 326static uint32_t aic7xxx_periodic_otag; 327 328/* 329 * Module information and settable options. 330 */ 331static char *aic7xxx = NULL; 332 333MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>"); 334MODULE_DESCRIPTION("Adaptec Aic77XX/78XX SCSI Host Bus Adapter driver"); 335MODULE_LICENSE("Dual BSD/GPL"); 336MODULE_VERSION(AIC7XXX_DRIVER_VERSION); 337module_param(aic7xxx, charp, 0444); 338MODULE_PARM_DESC(aic7xxx, 339"period-delimited options string:\n" 340" verbose Enable verbose/diagnostic logging\n" 341" allow_memio Allow device registers to be memory mapped\n" 342" debug Bitmask of debug values to enable\n" 343" no_probe Toggle EISA/VLB controller probing\n" 344" probe_eisa_vl Toggle EISA/VLB controller probing\n" 345" no_reset Supress initial bus resets\n" 346" extended Enable extended geometry on all controllers\n" 347" periodic_otag Send an ordered tagged transaction\n" 348" periodically to prevent tag starvation.\n" 349" This may be required by some older disk\n" 350" drives or RAID arrays.\n" 351" tag_info:<tag_str> Set per-target tag depth\n" 352" global_tag_depth:<int> Global tag depth for every target\n" 353" on every bus\n" 354" seltime:<int> Selection Timeout\n" 355" (0/256ms,1/128ms,2/64ms,3/32ms)\n" 356"\n" 357" Sample /etc/modprobe.conf line:\n" 358" Toggle EISA/VLB probing\n" 359" Set tag depth on Controller 1/Target 1 to 10 tags\n" 360" Shorten the selection timeout to 128ms\n" 361"\n" 362" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" 363); 364 365static void ahc_linux_handle_scsi_status(struct ahc_softc *, 366 struct scsi_device *, 367 struct scb *); 368static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, 369 struct scsi_cmnd *cmd); 370static void ahc_linux_freeze_simq(struct ahc_softc *ahc); 371static void ahc_linux_release_simq(struct ahc_softc *ahc); 372static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag); 373static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); 374static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, 375 struct ahc_devinfo *devinfo); 376static void ahc_linux_device_queue_depth(struct scsi_device *); 377static int ahc_linux_run_command(struct ahc_softc*, 378 struct ahc_linux_device *, 379 struct scsi_cmnd *); 380static void ahc_linux_setup_tag_info_global(char *p); 381static int aic7xxx_setup(char *s); 382 383static int ahc_linux_unit; 384 385 386/********************************* Inlines ************************************/ 387static __inline void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); 388 389static __inline int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 390 struct ahc_dma_seg *sg, 391 dma_addr_t addr, bus_size_t len); 392 393static __inline void 394ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) 395{ 396 struct scsi_cmnd *cmd; 397 398 cmd = scb->io_ctx; 399 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); 400 if (cmd->use_sg != 0) { 401 struct scatterlist *sg; 402 403 sg = (struct scatterlist *)cmd->request_buffer; 404 pci_unmap_sg(ahc->dev_softc, sg, cmd->use_sg, 405 cmd->sc_data_direction); 406 } else if (cmd->request_bufflen != 0) { 407 pci_unmap_single(ahc->dev_softc, 408 scb->platform_data->buf_busaddr, 409 cmd->request_bufflen, 410 cmd->sc_data_direction); 411 } 412} 413 414static __inline int 415ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 416 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) 417{ 418 int consumed; 419 420 if ((scb->sg_count + 1) > AHC_NSEG) 421 panic("Too few segs for dma mapping. " 422 "Increase AHC_NSEG\n"); 423 424 consumed = 1; 425 sg->addr = ahc_htole32(addr & 0xFFFFFFFF); 426 scb->platform_data->xfer_len += len; 427 428 if (sizeof(dma_addr_t) > 4 429 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) 430 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; 431 432 sg->len = ahc_htole32(len); 433 return (consumed); 434} 435 436/* 437 * Return a string describing the driver. 438 */ 439static const char * 440ahc_linux_info(struct Scsi_Host *host) 441{ 442 static char buffer[512]; 443 char ahc_info[256]; 444 char *bp; 445 struct ahc_softc *ahc; 446 447 bp = &buffer[0]; 448 ahc = *(struct ahc_softc **)host->hostdata; 449 memset(bp, 0, sizeof(buffer)); 450 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev "); 451 strcat(bp, AIC7XXX_DRIVER_VERSION); 452 strcat(bp, "\n"); 453 strcat(bp, " <"); 454 strcat(bp, ahc->description); 455 strcat(bp, ">\n"); 456 strcat(bp, " "); 457 ahc_controller_info(ahc, ahc_info); 458 strcat(bp, ahc_info); 459 strcat(bp, "\n"); 460 461 return (bp); 462} 463 464/* 465 * Queue an SCB to the controller. 466 */ 467static int 468ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 469{ 470 struct ahc_softc *ahc; 471 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device); 472 int rtn = SCSI_MLQUEUE_HOST_BUSY; 473 unsigned long flags; 474 475 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 476 477 ahc_lock(ahc, &flags); 478 if (ahc->platform_data->qfrozen == 0) { 479 cmd->scsi_done = scsi_done; 480 cmd->result = CAM_REQ_INPROG << 16; 481 rtn = ahc_linux_run_command(ahc, dev, cmd); 482 } 483 ahc_unlock(ahc, &flags); 484 485 return rtn; 486} 487 488static inline struct scsi_target ** 489ahc_linux_target_in_softc(struct scsi_target *starget) 490{ 491 struct ahc_softc *ahc = 492 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 493 unsigned int target_offset; 494 495 target_offset = starget->id; 496 if (starget->channel != 0) 497 target_offset += 8; 498 499 return &ahc->platform_data->starget[target_offset]; 500} 501 502static int 503ahc_linux_target_alloc(struct scsi_target *starget) 504{ 505 struct ahc_softc *ahc = 506 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 507 struct seeprom_config *sc = ahc->seep_config; 508 unsigned long flags; 509 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 510 unsigned short scsirate; 511 struct ahc_devinfo devinfo; 512 struct ahc_initiator_tinfo *tinfo; 513 struct ahc_tmode_tstate *tstate; 514 char channel = starget->channel + 'A'; 515 unsigned int our_id = ahc->our_id; 516 unsigned int target_offset; 517 518 target_offset = starget->id; 519 if (starget->channel != 0) 520 target_offset += 8; 521 522 if (starget->channel) 523 our_id = ahc->our_id_b; 524 525 ahc_lock(ahc, &flags); 526 527 BUG_ON(*ahc_targp != NULL); 528 529 *ahc_targp = starget; 530 531 if (sc) { 532 int maxsync = AHC_SYNCRATE_DT; 533 int ultra = 0; 534 int flags = sc->device_flags[target_offset]; 535 536 if (ahc->flags & AHC_NEWEEPROM_FMT) { 537 if (flags & CFSYNCHISULTRA) 538 ultra = 1; 539 } else if (flags & CFULTRAEN) 540 ultra = 1; 541 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 542 * change it to ultra=0, CFXFER = 0 */ 543 if(ultra && (flags & CFXFER) == 0x04) { 544 ultra = 0; 545 flags &= ~CFXFER; 546 } 547 548 if ((ahc->features & AHC_ULTRA2) != 0) { 549 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); 550 } else { 551 scsirate = (flags & CFXFER) << 4; 552 maxsync = ultra ? AHC_SYNCRATE_ULTRA : 553 AHC_SYNCRATE_FAST; 554 } 555 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 556 if (!(flags & CFSYNCH)) 557 spi_max_offset(starget) = 0; 558 spi_min_period(starget) = 559 ahc_find_period(ahc, scsirate, maxsync); 560 561 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id, 562 starget->id, &tstate); 563 } 564 ahc_compile_devinfo(&devinfo, our_id, starget->id, 565 CAM_LUN_WILDCARD, channel, 566 ROLE_INITIATOR); 567 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, 568 AHC_TRANS_GOAL, /*paused*/FALSE); 569 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 570 AHC_TRANS_GOAL, /*paused*/FALSE); 571 ahc_unlock(ahc, &flags); 572 573 return 0; 574} 575 576static void 577ahc_linux_target_destroy(struct scsi_target *starget) 578{ 579 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 580 581 *ahc_targp = NULL; 582} 583 584static int 585ahc_linux_slave_alloc(struct scsi_device *sdev) 586{ 587 struct ahc_softc *ahc = 588 *((struct ahc_softc **)sdev->host->hostdata); 589 struct scsi_target *starget = sdev->sdev_target; 590 struct ahc_linux_device *dev; 591 592 if (bootverbose) 593 printf("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); 594 595 dev = scsi_transport_device_data(sdev); 596 memset(dev, 0, sizeof(*dev)); 597 598 /* 599 * We start out life using untagged 600 * transactions of which we allow one. 601 */ 602 dev->openings = 1; 603 604 /* 605 * Set maxtags to 0. This will be changed if we 606 * later determine that we are dealing with 607 * a tagged queuing capable device. 608 */ 609 dev->maxtags = 0; 610 611 spi_period(starget) = 0; 612 613 return 0; 614} 615 616static int 617ahc_linux_slave_configure(struct scsi_device *sdev) 618{ 619 struct ahc_softc *ahc; 620 621 ahc = *((struct ahc_softc **)sdev->host->hostdata); 622 623 if (bootverbose) 624 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 625 626 ahc_linux_device_queue_depth(sdev); 627 628 /* Initial Domain Validation */ 629 if (!spi_initial_dv(sdev->sdev_target)) 630 spi_dv_device(sdev); 631 632 return 0; 633} 634 635#if defined(__i386__) 636/* 637 * Return the disk geometry for the given SCSI device. 638 */ 639static int 640ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 641 sector_t capacity, int geom[]) 642{ 643 uint8_t *bh; 644 int heads; 645 int sectors; 646 int cylinders; 647 int ret; 648 int extended; 649 struct ahc_softc *ahc; 650 u_int channel; 651 652 ahc = *((struct ahc_softc **)sdev->host->hostdata); 653 channel = sdev_channel(sdev); 654 655 bh = scsi_bios_ptable(bdev); 656 if (bh) { 657 ret = scsi_partsize(bh, capacity, 658 &geom[2], &geom[0], &geom[1]); 659 kfree(bh); 660 if (ret != -1) 661 return (ret); 662 } 663 heads = 64; 664 sectors = 32; 665 cylinders = aic_sector_div(capacity, heads, sectors); 666 667 if (aic7xxx_extended != 0) 668 extended = 1; 669 else if (channel == 0) 670 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; 671 else 672 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; 673 if (extended && cylinders >= 1024) { 674 heads = 255; 675 sectors = 63; 676 cylinders = aic_sector_div(capacity, heads, sectors); 677 } 678 geom[0] = heads; 679 geom[1] = sectors; 680 geom[2] = cylinders; 681 return (0); 682} 683#endif 684 685/* 686 * Abort the current SCSI command(s). 687 */ 688static int 689ahc_linux_abort(struct scsi_cmnd *cmd) 690{ 691 int error; 692 693 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); 694 if (error != 0) 695 printf("aic7xxx_abort returns 0x%x\n", error); 696 return (error); 697} 698 699/* 700 * Attempt to send a target reset message to the device that timed out. 701 */ 702static int 703ahc_linux_dev_reset(struct scsi_cmnd *cmd) 704{ 705 int error; 706 707 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); 708 if (error != 0) 709 printf("aic7xxx_dev_reset returns 0x%x\n", error); 710 return (error); 711} 712 713/* 714 * Reset the SCSI bus. 715 */ 716static int 717ahc_linux_bus_reset(struct scsi_cmnd *cmd) 718{ 719 struct ahc_softc *ahc; 720 int found; 721 unsigned long flags; 722 723 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 724 725 ahc_lock(ahc, &flags); 726 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A', 727 /*initiate reset*/TRUE); 728 ahc_unlock(ahc, &flags); 729 730 if (bootverbose) 731 printf("%s: SCSI bus reset delivered. " 732 "%d SCBs aborted.\n", ahc_name(ahc), found); 733 734 return SUCCESS; 735} 736 737struct scsi_host_template aic7xxx_driver_template = { 738 .module = THIS_MODULE, 739 .name = "aic7xxx", 740 .proc_name = "aic7xxx", 741 .proc_info = ahc_linux_proc_info, 742 .info = ahc_linux_info, 743 .queuecommand = ahc_linux_queue, 744 .eh_abort_handler = ahc_linux_abort, 745 .eh_device_reset_handler = ahc_linux_dev_reset, 746 .eh_bus_reset_handler = ahc_linux_bus_reset, 747#if defined(__i386__) 748 .bios_param = ahc_linux_biosparam, 749#endif 750 .can_queue = AHC_MAX_QUEUE, 751 .this_id = -1, 752 .max_sectors = 8192, 753 .cmd_per_lun = 2, 754 .use_clustering = ENABLE_CLUSTERING, 755 .slave_alloc = ahc_linux_slave_alloc, 756 .slave_configure = ahc_linux_slave_configure, 757 .target_alloc = ahc_linux_target_alloc, 758 .target_destroy = ahc_linux_target_destroy, 759}; 760 761/**************************** Tasklet Handler *********************************/ 762 763/******************************** Macros **************************************/ 764#define BUILD_SCSIID(ahc, cmd) \ 765 ((((cmd)->device->id << TID_SHIFT) & TID) \ 766 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ 767 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) 768 769/******************************** Bus DMA *************************************/ 770int 771ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, 772 bus_size_t alignment, bus_size_t boundary, 773 dma_addr_t lowaddr, dma_addr_t highaddr, 774 bus_dma_filter_t *filter, void *filterarg, 775 bus_size_t maxsize, int nsegments, 776 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 777{ 778 bus_dma_tag_t dmat; 779 780 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); 781 if (dmat == NULL) 782 return (ENOMEM); 783 784 /* 785 * Linux is very simplistic about DMA memory. For now don't 786 * maintain all specification information. Once Linux supplies 787 * better facilities for doing these operations, or the 788 * needs of this particular driver change, we might need to do 789 * more here. 790 */ 791 dmat->alignment = alignment; 792 dmat->boundary = boundary; 793 dmat->maxsize = maxsize; 794 *ret_tag = dmat; 795 return (0); 796} 797 798void 799ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) 800{ 801 free(dmat, M_DEVBUF); 802} 803 804int 805ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, 806 int flags, bus_dmamap_t *mapp) 807{ 808 *vaddr = pci_alloc_consistent(ahc->dev_softc, 809 dmat->maxsize, mapp); 810 if (*vaddr == NULL) 811 return ENOMEM; 812 return 0; 813} 814 815void 816ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, 817 void* vaddr, bus_dmamap_t map) 818{ 819 pci_free_consistent(ahc->dev_softc, dmat->maxsize, 820 vaddr, map); 821} 822 823int 824ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, 825 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 826 void *cb_arg, int flags) 827{ 828 /* 829 * Assume for now that this will only be used during 830 * initialization and not for per-transaction buffer mapping. 831 */ 832 bus_dma_segment_t stack_sg; 833 834 stack_sg.ds_addr = map; 835 stack_sg.ds_len = dmat->maxsize; 836 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 837 return (0); 838} 839 840void 841ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 842{ 843} 844 845int 846ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 847{ 848 /* Nothing to do */ 849 return (0); 850} 851 852static void 853ahc_linux_setup_tag_info_global(char *p) 854{ 855 int tags, i, j; 856 857 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 858 printf("Setting Global Tags= %d\n", tags); 859 860 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) { 861 for (j = 0; j < AHC_NUM_TARGETS; j++) { 862 aic7xxx_tag_info[i].tag_commands[j] = tags; 863 } 864 } 865} 866 867static void 868ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 869{ 870 871 if ((instance >= 0) && (targ >= 0) 872 && (instance < ARRAY_SIZE(aic7xxx_tag_info)) 873 && (targ < AHC_NUM_TARGETS)) { 874 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; 875 if (bootverbose) 876 printf("tag_info[%d:%d] = %d\n", instance, targ, value); 877 } 878} 879 880static char * 881ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 882 void (*callback)(u_long, int, int, int32_t), 883 u_long callback_arg) 884{ 885 char *tok_end; 886 char *tok_end2; 887 int i; 888 int instance; 889 int targ; 890 int done; 891 char tok_list[] = {'.', ',', '{', '}', '\0'}; 892 893 /* All options use a ':' name/arg separator */ 894 if (*opt_arg != ':') 895 return (opt_arg); 896 opt_arg++; 897 instance = -1; 898 targ = -1; 899 done = FALSE; 900 /* 901 * Restore separator that may be in 902 * the middle of our option argument. 903 */ 904 tok_end = strchr(opt_arg, '\0'); 905 if (tok_end < end) 906 *tok_end = ','; 907 while (!done) { 908 switch (*opt_arg) { 909 case '{': 910 if (instance == -1) { 911 instance = 0; 912 } else { 913 if (depth > 1) { 914 if (targ == -1) 915 targ = 0; 916 } else { 917 printf("Malformed Option %s\n", 918 opt_name); 919 done = TRUE; 920 } 921 } 922 opt_arg++; 923 break; 924 case '}': 925 if (targ != -1) 926 targ = -1; 927 else if (instance != -1) 928 instance = -1; 929 opt_arg++; 930 break; 931 case ',': 932 case '.': 933 if (instance == -1) 934 done = TRUE; 935 else if (targ >= 0) 936 targ++; 937 else if (instance >= 0) 938 instance++; 939 opt_arg++; 940 break; 941 case '\0': 942 done = TRUE; 943 break; 944 default: 945 tok_end = end; 946 for (i = 0; tok_list[i]; i++) { 947 tok_end2 = strchr(opt_arg, tok_list[i]); 948 if ((tok_end2) && (tok_end2 < tok_end)) 949 tok_end = tok_end2; 950 } 951 callback(callback_arg, instance, targ, 952 simple_strtol(opt_arg, NULL, 0)); 953 opt_arg = tok_end; 954 break; 955 } 956 } 957 return (opt_arg); 958} 959 960/* 961 * Handle Linux boot parameters. This routine allows for assigning a value 962 * to a parameter with a ':' between the parameter and the value. 963 * ie. aic7xxx=stpwlev:1,extended 964 */ 965static int 966aic7xxx_setup(char *s) 967{ 968 int i, n; 969 char *p; 970 char *end; 971 972 static struct { 973 const char *name; 974 uint32_t *flag; 975 } options[] = { 976 { "extended", &aic7xxx_extended }, 977 { "no_reset", &aic7xxx_no_reset }, 978 { "verbose", &aic7xxx_verbose }, 979 { "allow_memio", &aic7xxx_allow_memio}, 980#ifdef AHC_DEBUG 981 { "debug", &ahc_debug }, 982#endif 983 { "periodic_otag", &aic7xxx_periodic_otag }, 984 { "pci_parity", &aic7xxx_pci_parity }, 985 { "seltime", &aic7xxx_seltime }, 986 { "tag_info", NULL }, 987 { "global_tag_depth", NULL }, 988 { "dv", NULL } 989 }; 990 991 end = strchr(s, '\0'); 992 993 n = 0; 994 995 while ((p = strsep(&s, ",.")) != NULL) { 996 if (*p == '\0') 997 continue; 998 for (i = 0; i < ARRAY_SIZE(options); i++) { 999 1000 n = strlen(options[i].name); 1001 if (strncmp(options[i].name, p, n) == 0) 1002 break; 1003 } 1004 if (i == ARRAY_SIZE(options)) 1005 continue; 1006 1007 if (strncmp(p, "global_tag_depth", n) == 0) { 1008 ahc_linux_setup_tag_info_global(p + n); 1009 } else if (strncmp(p, "tag_info", n) == 0) { 1010 s = ahc_parse_brace_option("tag_info", p + n, end, 1011 2, ahc_linux_setup_tag_info, 0); 1012 } else if (p[n] == ':') { 1013 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1014 } else if (strncmp(p, "verbose", n) == 0) { 1015 *(options[i].flag) = 1; 1016 } else { 1017 *(options[i].flag) ^= 0xFFFFFFFF; 1018 } 1019 } 1020 return 1; 1021} 1022 1023__setup("aic7xxx=", aic7xxx_setup); 1024 1025uint32_t aic7xxx_verbose; 1026 1027int 1028ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) 1029{ 1030 char buf[80]; 1031 struct Scsi_Host *host; 1032 char *new_name; 1033 u_long s; 1034 int retval; 1035 1036 template->name = ahc->description; 1037 host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); 1038 if (host == NULL) 1039 return (ENOMEM); 1040 1041 *((struct ahc_softc **)host->hostdata) = ahc; 1042 ahc->platform_data->host = host; 1043 host->can_queue = AHC_MAX_QUEUE; 1044 host->cmd_per_lun = 2; 1045 host->this_id = ahc->our_id; 1046 host->irq = ahc->platform_data->irq; 1047 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; 1048 host->max_lun = AHC_NUM_LUNS; 1049 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; 1050 host->sg_tablesize = AHC_NSEG; 1051 ahc_lock(ahc, &s); 1052 ahc_set_unit(ahc, ahc_linux_unit++); 1053 ahc_unlock(ahc, &s); 1054 sprintf(buf, "scsi%d", host->host_no); 1055 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 1056 if (new_name != NULL) { 1057 strcpy(new_name, buf); 1058 ahc_set_name(ahc, new_name); 1059 } 1060 host->unique_id = ahc->unit; 1061 ahc_linux_initialize_scsi_bus(ahc); 1062 ahc_intr_enable(ahc, TRUE); 1063 1064 host->transportt = ahc_linux_transport_template; 1065 1066 retval = scsi_add_host(host, 1067 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); 1068 if (retval) { 1069 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n"); 1070 scsi_host_put(host); 1071 return retval; 1072 } 1073 1074 scsi_scan_host(host); 1075 return 0; 1076} 1077 1078/* 1079 * Place the SCSI bus into a known state by either resetting it, 1080 * or forcing transfer negotiations on the next command to any 1081 * target. 1082 */ 1083void 1084ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) 1085{ 1086 int i; 1087 int numtarg; 1088 unsigned long s; 1089 1090 i = 0; 1091 numtarg = 0; 1092 1093 ahc_lock(ahc, &s); 1094 1095 if (aic7xxx_no_reset != 0) 1096 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); 1097 1098 if ((ahc->flags & AHC_RESET_BUS_A) != 0) 1099 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); 1100 else 1101 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; 1102 1103 if ((ahc->features & AHC_TWIN) != 0) { 1104 1105 if ((ahc->flags & AHC_RESET_BUS_B) != 0) { 1106 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); 1107 } else { 1108 if (numtarg == 0) 1109 i = 8; 1110 numtarg += 8; 1111 } 1112 } 1113 1114 /* 1115 * Force negotiation to async for all targets that 1116 * will not see an initial bus reset. 1117 */ 1118 for (; i < numtarg; i++) { 1119 struct ahc_devinfo devinfo; 1120 struct ahc_initiator_tinfo *tinfo; 1121 struct ahc_tmode_tstate *tstate; 1122 u_int our_id; 1123 u_int target_id; 1124 char channel; 1125 1126 channel = 'A'; 1127 our_id = ahc->our_id; 1128 target_id = i; 1129 if (i > 7 && (ahc->features & AHC_TWIN) != 0) { 1130 channel = 'B'; 1131 our_id = ahc->our_id_b; 1132 target_id = i % 8; 1133 } 1134 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, 1135 target_id, &tstate); 1136 ahc_compile_devinfo(&devinfo, our_id, target_id, 1137 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); 1138 ahc_update_neg_request(ahc, &devinfo, tstate, 1139 tinfo, AHC_NEG_ALWAYS); 1140 } 1141 ahc_unlock(ahc, &s); 1142 /* Give the bus some time to recover */ 1143 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { 1144 ahc_linux_freeze_simq(ahc); 1145 msleep(AIC7XXX_RESET_DELAY); 1146 ahc_linux_release_simq(ahc); 1147 } 1148} 1149 1150int 1151ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) 1152{ 1153 1154 ahc->platform_data = 1155 malloc(sizeof(struct ahc_platform_data), M_DEVBUF, M_NOWAIT); 1156 if (ahc->platform_data == NULL) 1157 return (ENOMEM); 1158 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); 1159 ahc->platform_data->irq = AHC_LINUX_NOIRQ; 1160 ahc_lockinit(ahc); 1161 ahc->seltime = (aic7xxx_seltime & 0x3) << 4; 1162 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; 1163 if (aic7xxx_pci_parity == 0) 1164 ahc->flags |= AHC_DISABLE_PCI_PERR; 1165 1166 return (0); 1167} 1168 1169void 1170ahc_platform_free(struct ahc_softc *ahc) 1171{ 1172 struct scsi_target *starget; 1173 int i; 1174 1175 if (ahc->platform_data != NULL) { 1176 /* destroy all of the device and target objects */ 1177 for (i = 0; i < AHC_NUM_TARGETS; i++) { 1178 starget = ahc->platform_data->starget[i]; 1179 if (starget != NULL) { 1180 ahc->platform_data->starget[i] = NULL; 1181 } 1182 } 1183 1184 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) 1185 free_irq(ahc->platform_data->irq, ahc); 1186 if (ahc->tag == BUS_SPACE_PIO 1187 && ahc->bsh.ioport != 0) 1188 release_region(ahc->bsh.ioport, 256); 1189 if (ahc->tag == BUS_SPACE_MEMIO 1190 && ahc->bsh.maddr != NULL) { 1191 iounmap(ahc->bsh.maddr); 1192 release_mem_region(ahc->platform_data->mem_busaddr, 1193 0x1000); 1194 } 1195 1196 if (ahc->platform_data->host) 1197 scsi_host_put(ahc->platform_data->host); 1198 1199 free(ahc->platform_data, M_DEVBUF); 1200 } 1201} 1202 1203void 1204ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) 1205{ 1206 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), 1207 SCB_GET_CHANNEL(ahc, scb), 1208 SCB_GET_LUN(scb), SCB_LIST_NULL, 1209 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1210} 1211 1212void 1213ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, 1214 struct ahc_devinfo *devinfo, ahc_queue_alg alg) 1215{ 1216 struct ahc_linux_device *dev; 1217 int was_queuing; 1218 int now_queuing; 1219 1220 if (sdev == NULL) 1221 return; 1222 dev = scsi_transport_device_data(sdev); 1223 1224 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); 1225 switch (alg) { 1226 default: 1227 case AHC_QUEUE_NONE: 1228 now_queuing = 0; 1229 break; 1230 case AHC_QUEUE_BASIC: 1231 now_queuing = AHC_DEV_Q_BASIC; 1232 break; 1233 case AHC_QUEUE_TAGGED: 1234 now_queuing = AHC_DEV_Q_TAGGED; 1235 break; 1236 } 1237 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 1238 && (was_queuing != now_queuing) 1239 && (dev->active != 0)) { 1240 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; 1241 dev->qfrozen++; 1242 } 1243 1244 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); 1245 if (now_queuing) { 1246 u_int usertags; 1247 1248 usertags = ahc_linux_user_tagdepth(ahc, devinfo); 1249 if (!was_queuing) { 1250 /* 1251 * Start out agressively and allow our 1252 * dynamic queue depth algorithm to take 1253 * care of the rest. 1254 */ 1255 dev->maxtags = usertags; 1256 dev->openings = dev->maxtags - dev->active; 1257 } 1258 if (dev->maxtags == 0) { 1259 /* 1260 * Queueing is disabled by the user. 1261 */ 1262 dev->openings = 1; 1263 } else if (alg == AHC_QUEUE_TAGGED) { 1264 dev->flags |= AHC_DEV_Q_TAGGED; 1265 if (aic7xxx_periodic_otag != 0) 1266 dev->flags |= AHC_DEV_PERIODIC_OTAG; 1267 } else 1268 dev->flags |= AHC_DEV_Q_BASIC; 1269 } else { 1270 /* We can only have one opening. */ 1271 dev->maxtags = 0; 1272 dev->openings = 1 - dev->active; 1273 } 1274 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { 1275 case AHC_DEV_Q_BASIC: 1276 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 1277 scsi_activate_tcq(sdev, dev->openings + dev->active); 1278 break; 1279 case AHC_DEV_Q_TAGGED: 1280 scsi_set_tag_type(sdev, MSG_ORDERED_TAG); 1281 scsi_activate_tcq(sdev, dev->openings + dev->active); 1282 break; 1283 default: 1284 /* 1285 * We allow the OS to queue 2 untagged transactions to 1286 * us at any time even though we can only execute them 1287 * serially on the controller/device. This should 1288 * remove some latency. 1289 */ 1290 scsi_deactivate_tcq(sdev, 2); 1291 break; 1292 } 1293} 1294 1295int 1296ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, 1297 int lun, u_int tag, role_t role, uint32_t status) 1298{ 1299 return 0; 1300} 1301 1302static u_int 1303ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 1304{ 1305 static int warned_user; 1306 u_int tags; 1307 1308 tags = 0; 1309 if ((ahc->user_discenable & devinfo->target_mask) != 0) { 1310 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) { 1311 if (warned_user == 0) { 1312 1313 printf(KERN_WARNING 1314"aic7xxx: WARNING: Insufficient tag_info instances\n" 1315"aic7xxx: for installed controllers. Using defaults\n" 1316"aic7xxx: Please update the aic7xxx_tag_info array in\n" 1317"aic7xxx: the aic7xxx_osm..c source file.\n"); 1318 warned_user++; 1319 } 1320 tags = AHC_MAX_QUEUE; 1321 } else { 1322 adapter_tag_info_t *tag_info; 1323 1324 tag_info = &aic7xxx_tag_info[ahc->unit]; 1325 tags = tag_info->tag_commands[devinfo->target_offset]; 1326 if (tags > AHC_MAX_QUEUE) 1327 tags = AHC_MAX_QUEUE; 1328 } 1329 } 1330 return (tags); 1331} 1332 1333/* 1334 * Determines the queue depth for a given device. 1335 */ 1336static void 1337ahc_linux_device_queue_depth(struct scsi_device *sdev) 1338{ 1339 struct ahc_devinfo devinfo; 1340 u_int tags; 1341 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); 1342 1343 ahc_compile_devinfo(&devinfo, 1344 sdev->sdev_target->channel == 0 1345 ? ahc->our_id : ahc->our_id_b, 1346 sdev->sdev_target->id, sdev->lun, 1347 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1348 ROLE_INITIATOR); 1349 tags = ahc_linux_user_tagdepth(ahc, &devinfo); 1350 if (tags != 0 && sdev->tagged_supported != 0) { 1351 1352 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED); 1353 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1354 devinfo.lun, AC_TRANSFER_NEG); 1355 ahc_print_devinfo(ahc, &devinfo); 1356 printf("Tagged Queuing enabled. Depth %d\n", tags); 1357 } else { 1358 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE); 1359 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1360 devinfo.lun, AC_TRANSFER_NEG); 1361 } 1362} 1363 1364static int 1365ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, 1366 struct scsi_cmnd *cmd) 1367{ 1368 struct scb *scb; 1369 struct hardware_scb *hscb; 1370 struct ahc_initiator_tinfo *tinfo; 1371 struct ahc_tmode_tstate *tstate; 1372 uint16_t mask; 1373 struct scb_tailq *untagged_q = NULL; 1374 1375 /* 1376 * Schedule us to run later. The only reason we are not 1377 * running is because the whole controller Q is frozen. 1378 */ 1379 if (ahc->platform_data->qfrozen != 0) 1380 return SCSI_MLQUEUE_HOST_BUSY; 1381 1382 /* 1383 * We only allow one untagged transaction 1384 * per target in the initiator role unless 1385 * we are storing a full busy target *lun* 1386 * table in SCB space. 1387 */ 1388 if (!blk_rq_tagged(cmd->request) 1389 && (ahc->features & AHC_SCB_BTT) == 0) { 1390 int target_offset; 1391 1392 target_offset = cmd->device->id + cmd->device->channel * 8; 1393 untagged_q = &(ahc->untagged_queues[target_offset]); 1394 if (!TAILQ_EMPTY(untagged_q)) 1395 /* if we're already executing an untagged command 1396 * we're busy to another */ 1397 return SCSI_MLQUEUE_DEVICE_BUSY; 1398 } 1399 1400 /* 1401 * Get an scb to use. 1402 */ 1403 scb = ahc_get_scb(ahc); 1404 if (!scb) 1405 return SCSI_MLQUEUE_HOST_BUSY; 1406 1407 scb->io_ctx = cmd; 1408 scb->platform_data->dev = dev; 1409 hscb = scb->hscb; 1410 cmd->host_scribble = (char *)scb; 1411 1412 /* 1413 * Fill out basics of the HSCB. 1414 */ 1415 hscb->control = 0; 1416 hscb->scsiid = BUILD_SCSIID(ahc, cmd); 1417 hscb->lun = cmd->device->lun; 1418 mask = SCB_GET_TARGET_MASK(ahc, scb); 1419 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), 1420 SCB_GET_OUR_ID(scb), 1421 SCB_GET_TARGET(ahc, scb), &tstate); 1422 hscb->scsirate = tinfo->scsirate; 1423 hscb->scsioffset = tinfo->curr.offset; 1424 if ((tstate->ultraenb & mask) != 0) 1425 hscb->control |= ULTRAENB; 1426 1427 if ((ahc->user_discenable & mask) != 0) 1428 hscb->control |= DISCENB; 1429 1430 if ((tstate->auto_negotiate & mask) != 0) { 1431 scb->flags |= SCB_AUTO_NEGOTIATE; 1432 scb->hscb->control |= MK_MESSAGE; 1433 } 1434 1435 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { 1436 int msg_bytes; 1437 uint8_t tag_msgs[2]; 1438 1439 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1440 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1441 hscb->control |= tag_msgs[0]; 1442 if (tag_msgs[0] == MSG_ORDERED_TASK) 1443 dev->commands_since_idle_or_otag = 0; 1444 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH 1445 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { 1446 hscb->control |= MSG_ORDERED_TASK; 1447 dev->commands_since_idle_or_otag = 0; 1448 } else { 1449 hscb->control |= MSG_SIMPLE_TASK; 1450 } 1451 } 1452 1453 hscb->cdb_len = cmd->cmd_len; 1454 if (hscb->cdb_len <= 12) { 1455 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); 1456 } else { 1457 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); 1458 scb->flags |= SCB_CDB32_PTR; 1459 } 1460 1461 scb->platform_data->xfer_len = 0; 1462 ahc_set_residual(scb, 0); 1463 ahc_set_sense_residual(scb, 0); 1464 scb->sg_count = 0; 1465 if (cmd->use_sg != 0) { 1466 struct ahc_dma_seg *sg; 1467 struct scatterlist *cur_seg; 1468 struct scatterlist *end_seg; 1469 int nseg; 1470 1471 cur_seg = (struct scatterlist *)cmd->request_buffer; 1472 nseg = pci_map_sg(ahc->dev_softc, cur_seg, cmd->use_sg, 1473 cmd->sc_data_direction); 1474 end_seg = cur_seg + nseg; 1475 /* Copy the segments into the SG list. */ 1476 sg = scb->sg_list; 1477 /* 1478 * The sg_count may be larger than nseg if 1479 * a transfer crosses a 32bit page. 1480 */ 1481 while (cur_seg < end_seg) { 1482 dma_addr_t addr; 1483 bus_size_t len; 1484 int consumed; 1485 1486 addr = sg_dma_address(cur_seg); 1487 len = sg_dma_len(cur_seg); 1488 consumed = ahc_linux_map_seg(ahc, scb, 1489 sg, addr, len); 1490 sg += consumed; 1491 scb->sg_count += consumed; 1492 cur_seg++; 1493 } 1494 sg--; 1495 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 1496 1497 /* 1498 * Reset the sg list pointer. 1499 */ 1500 scb->hscb->sgptr = 1501 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 1502 1503 /* 1504 * Copy the first SG into the "current" 1505 * data pointer area. 1506 */ 1507 scb->hscb->dataptr = scb->sg_list->addr; 1508 scb->hscb->datacnt = scb->sg_list->len; 1509 } else if (cmd->request_bufflen != 0) { 1510 struct ahc_dma_seg *sg; 1511 dma_addr_t addr; 1512 1513 sg = scb->sg_list; 1514 addr = pci_map_single(ahc->dev_softc, 1515 cmd->request_buffer, 1516 cmd->request_bufflen, 1517 cmd->sc_data_direction); 1518 scb->platform_data->buf_busaddr = addr; 1519 scb->sg_count = ahc_linux_map_seg(ahc, scb, 1520 sg, addr, 1521 cmd->request_bufflen); 1522 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 1523 1524 /* 1525 * Reset the sg list pointer. 1526 */ 1527 scb->hscb->sgptr = 1528 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 1529 1530 /* 1531 * Copy the first SG into the "current" 1532 * data pointer area. 1533 */ 1534 scb->hscb->dataptr = sg->addr; 1535 scb->hscb->datacnt = sg->len; 1536 } else { 1537 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); 1538 scb->hscb->dataptr = 0; 1539 scb->hscb->datacnt = 0; 1540 scb->sg_count = 0; 1541 } 1542 1543 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); 1544 dev->openings--; 1545 dev->active++; 1546 dev->commands_issued++; 1547 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) 1548 dev->commands_since_idle_or_otag++; 1549 1550 scb->flags |= SCB_ACTIVE; 1551 if (untagged_q) { 1552 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); 1553 scb->flags |= SCB_UNTAGGEDQ; 1554 } 1555 ahc_queue_scb(ahc, scb); 1556 return 0; 1557} 1558 1559/* 1560 * SCSI controller interrupt handler. 1561 */ 1562irqreturn_t 1563ahc_linux_isr(int irq, void *dev_id) 1564{ 1565 struct ahc_softc *ahc; 1566 u_long flags; 1567 int ours; 1568 1569 ahc = (struct ahc_softc *) dev_id; 1570 ahc_lock(ahc, &flags); 1571 ours = ahc_intr(ahc); 1572 ahc_unlock(ahc, &flags); 1573 return IRQ_RETVAL(ours); 1574} 1575 1576void 1577ahc_platform_flushwork(struct ahc_softc *ahc) 1578{ 1579 1580} 1581 1582void 1583ahc_send_async(struct ahc_softc *ahc, char channel, 1584 u_int target, u_int lun, ac_code code) 1585{ 1586 switch (code) { 1587 case AC_TRANSFER_NEG: 1588 { 1589 char buf[80]; 1590 struct scsi_target *starget; 1591 struct ahc_linux_target *targ; 1592 struct info_str info; 1593 struct ahc_initiator_tinfo *tinfo; 1594 struct ahc_tmode_tstate *tstate; 1595 int target_offset; 1596 unsigned int target_ppr_options; 1597 1598 BUG_ON(target == CAM_TARGET_WILDCARD); 1599 1600 info.buffer = buf; 1601 info.length = sizeof(buf); 1602 info.offset = 0; 1603 info.pos = 0; 1604 tinfo = ahc_fetch_transinfo(ahc, channel, 1605 channel == 'A' ? ahc->our_id 1606 : ahc->our_id_b, 1607 target, &tstate); 1608 1609 /* 1610 * Don't bother reporting results while 1611 * negotiations are still pending. 1612 */ 1613 if (tinfo->curr.period != tinfo->goal.period 1614 || tinfo->curr.width != tinfo->goal.width 1615 || tinfo->curr.offset != tinfo->goal.offset 1616 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1617 if (bootverbose == 0) 1618 break; 1619 1620 /* 1621 * Don't bother reporting results that 1622 * are identical to those last reported. 1623 */ 1624 target_offset = target; 1625 if (channel == 'B') 1626 target_offset += 8; 1627 starget = ahc->platform_data->starget[target_offset]; 1628 if (starget == NULL) 1629 break; 1630 targ = scsi_transport_target_data(starget); 1631 1632 target_ppr_options = 1633 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1634 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1635 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); 1636 1637 if (tinfo->curr.period == spi_period(starget) 1638 && tinfo->curr.width == spi_width(starget) 1639 && tinfo->curr.offset == spi_offset(starget) 1640 && tinfo->curr.ppr_options == target_ppr_options) 1641 if (bootverbose == 0) 1642 break; 1643 1644 spi_period(starget) = tinfo->curr.period; 1645 spi_width(starget) = tinfo->curr.width; 1646 spi_offset(starget) = tinfo->curr.offset; 1647 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1648 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1649 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1650 spi_display_xfer_agreement(starget); 1651 break; 1652 } 1653 case AC_SENT_BDR: 1654 { 1655 WARN_ON(lun != CAM_LUN_WILDCARD); 1656 scsi_report_device_reset(ahc->platform_data->host, 1657 channel - 'A', target); 1658 break; 1659 } 1660 case AC_BUS_RESET: 1661 if (ahc->platform_data->host != NULL) { 1662 scsi_report_bus_reset(ahc->platform_data->host, 1663 channel - 'A'); 1664 } 1665 break; 1666 default: 1667 panic("ahc_send_async: Unexpected async event"); 1668 } 1669} 1670 1671/* 1672 * Calls the higher level scsi done function and frees the scb. 1673 */ 1674void 1675ahc_done(struct ahc_softc *ahc, struct scb *scb) 1676{ 1677 struct scsi_cmnd *cmd; 1678 struct ahc_linux_device *dev; 1679 1680 LIST_REMOVE(scb, pending_links); 1681 if ((scb->flags & SCB_UNTAGGEDQ) != 0) { 1682 struct scb_tailq *untagged_q; 1683 int target_offset; 1684 1685 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); 1686 untagged_q = &(ahc->untagged_queues[target_offset]); 1687 TAILQ_REMOVE(untagged_q, scb, links.tqe); 1688 BUG_ON(!TAILQ_EMPTY(untagged_q)); 1689 } 1690 1691 if ((scb->flags & SCB_ACTIVE) == 0) { 1692 printf("SCB %d done'd twice\n", scb->hscb->tag); 1693 ahc_dump_card_state(ahc); 1694 panic("Stopping for safety"); 1695 } 1696 cmd = scb->io_ctx; 1697 dev = scb->platform_data->dev; 1698 dev->active--; 1699 dev->openings++; 1700 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1701 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1702 dev->qfrozen--; 1703 } 1704 ahc_linux_unmap_scb(ahc, scb); 1705 1706 /* 1707 * Guard against stale sense data. 1708 * The Linux mid-layer assumes that sense 1709 * was retrieved anytime the first byte of 1710 * the sense buffer looks "sane". 1711 */ 1712 cmd->sense_buffer[0] = 0; 1713 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { 1714 uint32_t amount_xferred; 1715 1716 amount_xferred = 1717 ahc_get_transfer_length(scb) - ahc_get_residual(scb); 1718 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1719#ifdef AHC_DEBUG 1720 if ((ahc_debug & AHC_SHOW_MISC) != 0) { 1721 ahc_print_path(ahc, scb); 1722 printf("Set CAM_UNCOR_PARITY\n"); 1723 } 1724#endif 1725 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); 1726#ifdef AHC_REPORT_UNDERFLOWS 1727 /* 1728 * This code is disabled by default as some 1729 * clients of the SCSI system do not properly 1730 * initialize the underflow parameter. This 1731 * results in spurious termination of commands 1732 * that complete as expected (e.g. underflow is 1733 * allowed as command can return variable amounts 1734 * of data. 1735 */ 1736 } else if (amount_xferred < scb->io_ctx->underflow) { 1737 u_int i; 1738 1739 ahc_print_path(ahc, scb); 1740 printf("CDB:"); 1741 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1742 printf(" 0x%x", scb->io_ctx->cmnd[i]); 1743 printf("\n"); 1744 ahc_print_path(ahc, scb); 1745 printf("Saw underflow (%ld of %ld bytes). " 1746 "Treated as error\n", 1747 ahc_get_residual(scb), 1748 ahc_get_transfer_length(scb)); 1749 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1750#endif 1751 } else { 1752 ahc_set_transaction_status(scb, CAM_REQ_CMP); 1753 } 1754 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1755 ahc_linux_handle_scsi_status(ahc, cmd->device, scb); 1756 } 1757 1758 if (dev->openings == 1 1759 && ahc_get_transaction_status(scb) == CAM_REQ_CMP 1760 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1761 dev->tag_success_count++; 1762 /* 1763 * Some devices deal with temporary internal resource 1764 * shortages by returning queue full. When the queue 1765 * full occurrs, we throttle back. Slowly try to get 1766 * back to our previous queue depth. 1767 */ 1768 if ((dev->openings + dev->active) < dev->maxtags 1769 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { 1770 dev->tag_success_count = 0; 1771 dev->openings++; 1772 } 1773 1774 if (dev->active == 0) 1775 dev->commands_since_idle_or_otag = 0; 1776 1777 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1778 printf("Recovery SCB completes\n"); 1779 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT 1780 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) 1781 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1782 1783 if (ahc->platform_data->eh_done) 1784 complete(ahc->platform_data->eh_done); 1785 } 1786 1787 ahc_free_scb(ahc, scb); 1788 ahc_linux_queue_cmd_complete(ahc, cmd); 1789} 1790 1791static void 1792ahc_linux_handle_scsi_status(struct ahc_softc *ahc, 1793 struct scsi_device *sdev, struct scb *scb) 1794{ 1795 struct ahc_devinfo devinfo; 1796 struct ahc_linux_device *dev = scsi_transport_device_data(sdev); 1797 1798 ahc_compile_devinfo(&devinfo, 1799 ahc->our_id, 1800 sdev->sdev_target->id, sdev->lun, 1801 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1802 ROLE_INITIATOR); 1803 1804 /* 1805 * We don't currently trust the mid-layer to 1806 * properly deal with queue full or busy. So, 1807 * when one occurs, we tell the mid-layer to 1808 * unconditionally requeue the command to us 1809 * so that we can retry it ourselves. We also 1810 * implement our own throttling mechanism so 1811 * we don't clobber the device with too many 1812 * commands. 1813 */ 1814 switch (ahc_get_scsi_status(scb)) { 1815 default: 1816 break; 1817 case SCSI_STATUS_CHECK_COND: 1818 case SCSI_STATUS_CMD_TERMINATED: 1819 { 1820 struct scsi_cmnd *cmd; 1821 1822 /* 1823 * Copy sense information to the OS's cmd 1824 * structure if it is available. 1825 */ 1826 cmd = scb->io_ctx; 1827 if (scb->flags & SCB_SENSE) { 1828 u_int sense_size; 1829 1830 sense_size = min(sizeof(struct scsi_sense_data) 1831 - ahc_get_sense_residual(scb), 1832 (u_long)sizeof(cmd->sense_buffer)); 1833 memcpy(cmd->sense_buffer, 1834 ahc_get_sense_buf(ahc, scb), sense_size); 1835 if (sense_size < sizeof(cmd->sense_buffer)) 1836 memset(&cmd->sense_buffer[sense_size], 0, 1837 sizeof(cmd->sense_buffer) - sense_size); 1838 cmd->result |= (DRIVER_SENSE << 24); 1839#ifdef AHC_DEBUG 1840 if (ahc_debug & AHC_SHOW_SENSE) { 1841 int i; 1842 1843 printf("Copied %d bytes of sense data:", 1844 sense_size); 1845 for (i = 0; i < sense_size; i++) { 1846 if ((i & 0xF) == 0) 1847 printf("\n"); 1848 printf("0x%x ", cmd->sense_buffer[i]); 1849 } 1850 printf("\n"); 1851 } 1852#endif 1853 } 1854 break; 1855 } 1856 case SCSI_STATUS_QUEUE_FULL: 1857 { 1858 /* 1859 * By the time the core driver has returned this 1860 * command, all other commands that were queued 1861 * to us but not the device have been returned. 1862 * This ensures that dev->active is equal to 1863 * the number of commands actually queued to 1864 * the device. 1865 */ 1866 dev->tag_success_count = 0; 1867 if (dev->active != 0) { 1868 /* 1869 * Drop our opening count to the number 1870 * of commands currently outstanding. 1871 */ 1872 dev->openings = 0; 1873/* 1874 ahc_print_path(ahc, scb); 1875 printf("Dropping tag count to %d\n", dev->active); 1876 */ 1877 if (dev->active == dev->tags_on_last_queuefull) { 1878 1879 dev->last_queuefull_same_count++; 1880 /* 1881 * If we repeatedly see a queue full 1882 * at the same queue depth, this 1883 * device has a fixed number of tag 1884 * slots. Lock in this tag depth 1885 * so we stop seeing queue fulls from 1886 * this device. 1887 */ 1888 if (dev->last_queuefull_same_count 1889 == AHC_LOCK_TAGS_COUNT) { 1890 dev->maxtags = dev->active; 1891 ahc_print_path(ahc, scb); 1892 printf("Locking max tag count at %d\n", 1893 dev->active); 1894 } 1895 } else { 1896 dev->tags_on_last_queuefull = dev->active; 1897 dev->last_queuefull_same_count = 0; 1898 } 1899 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); 1900 ahc_set_scsi_status(scb, SCSI_STATUS_OK); 1901 ahc_platform_set_tags(ahc, sdev, &devinfo, 1902 (dev->flags & AHC_DEV_Q_BASIC) 1903 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1904 break; 1905 } 1906 /* 1907 * Drop down to a single opening, and treat this 1908 * as if the target returned BUSY SCSI status. 1909 */ 1910 dev->openings = 1; 1911 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); 1912 ahc_platform_set_tags(ahc, sdev, &devinfo, 1913 (dev->flags & AHC_DEV_Q_BASIC) 1914 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1915 break; 1916 } 1917 } 1918} 1919 1920static void 1921ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) 1922{ 1923 /* 1924 * Map CAM error codes into Linux Error codes. We 1925 * avoid the conversion so that the DV code has the 1926 * full error information available when making 1927 * state change decisions. 1928 */ 1929 { 1930 u_int new_status; 1931 1932 switch (ahc_cmd_get_transaction_status(cmd)) { 1933 case CAM_REQ_INPROG: 1934 case CAM_REQ_CMP: 1935 case CAM_SCSI_STATUS_ERROR: 1936 new_status = DID_OK; 1937 break; 1938 case CAM_REQ_ABORTED: 1939 new_status = DID_ABORT; 1940 break; 1941 case CAM_BUSY: 1942 new_status = DID_BUS_BUSY; 1943 break; 1944 case CAM_REQ_INVALID: 1945 case CAM_PATH_INVALID: 1946 new_status = DID_BAD_TARGET; 1947 break; 1948 case CAM_SEL_TIMEOUT: 1949 new_status = DID_NO_CONNECT; 1950 break; 1951 case CAM_SCSI_BUS_RESET: 1952 case CAM_BDR_SENT: 1953 new_status = DID_RESET; 1954 break; 1955 case CAM_UNCOR_PARITY: 1956 new_status = DID_PARITY; 1957 break; 1958 case CAM_CMD_TIMEOUT: 1959 new_status = DID_TIME_OUT; 1960 break; 1961 case CAM_UA_ABORT: 1962 case CAM_REQ_CMP_ERR: 1963 case CAM_AUTOSENSE_FAIL: 1964 case CAM_NO_HBA: 1965 case CAM_DATA_RUN_ERR: 1966 case CAM_UNEXP_BUSFREE: 1967 case CAM_SEQUENCE_FAIL: 1968 case CAM_CCB_LEN_ERR: 1969 case CAM_PROVIDE_FAIL: 1970 case CAM_REQ_TERMIO: 1971 case CAM_UNREC_HBA_ERROR: 1972 case CAM_REQ_TOO_BIG: 1973 new_status = DID_ERROR; 1974 break; 1975 case CAM_REQUEUE_REQ: 1976 new_status = DID_REQUEUE; 1977 break; 1978 default: 1979 /* We should never get here */ 1980 new_status = DID_ERROR; 1981 break; 1982 } 1983 1984 ahc_cmd_set_transaction_status(cmd, new_status); 1985 } 1986 1987 cmd->scsi_done(cmd); 1988} 1989 1990static void 1991ahc_linux_freeze_simq(struct ahc_softc *ahc) 1992{ 1993 unsigned long s; 1994 1995 ahc_lock(ahc, &s); 1996 ahc->platform_data->qfrozen++; 1997 if (ahc->platform_data->qfrozen == 1) { 1998 scsi_block_requests(ahc->platform_data->host); 1999 2000 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, 2001 CAM_LUN_WILDCARD, SCB_LIST_NULL, 2002 ROLE_INITIATOR, CAM_REQUEUE_REQ); 2003 } 2004 ahc_unlock(ahc, &s); 2005} 2006 2007static void 2008ahc_linux_release_simq(struct ahc_softc *ahc) 2009{ 2010 u_long s; 2011 int unblock_reqs; 2012 2013 unblock_reqs = 0; 2014 ahc_lock(ahc, &s); 2015 if (ahc->platform_data->qfrozen > 0) 2016 ahc->platform_data->qfrozen--; 2017 if (ahc->platform_data->qfrozen == 0) 2018 unblock_reqs = 1; 2019 ahc_unlock(ahc, &s); 2020 /* 2021 * There is still a race here. The mid-layer 2022 * should keep its own freeze count and use 2023 * a bottom half handler to run the queues 2024 * so we can unblock with our own lock held. 2025 */ 2026 if (unblock_reqs) 2027 scsi_unblock_requests(ahc->platform_data->host); 2028} 2029 2030static int 2031ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) 2032{ 2033 struct ahc_softc *ahc; 2034 struct ahc_linux_device *dev; 2035 struct scb *pending_scb; 2036 u_int saved_scbptr; 2037 u_int active_scb_index; 2038 u_int last_phase; 2039 u_int saved_scsiid; 2040 u_int cdb_byte; 2041 int retval; 2042 int was_paused; 2043 int paused; 2044 int wait; 2045 int disconnected; 2046 unsigned long flags; 2047 2048 pending_scb = NULL; 2049 paused = FALSE; 2050 wait = FALSE; 2051 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 2052 2053 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n", 2054 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); 2055 2056 printf("CDB:"); 2057 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2058 printf(" 0x%x", cmd->cmnd[cdb_byte]); 2059 printf("\n"); 2060 2061 ahc_lock(ahc, &flags); 2062 2063 /* 2064 * First determine if we currently own this command. 2065 * Start by searching the device queue. If not found 2066 * there, check the pending_scb list. If not found 2067 * at all, and the system wanted us to just abort the 2068 * command, return success. 2069 */ 2070 dev = scsi_transport_device_data(cmd->device); 2071 2072 if (dev == NULL) { 2073 /* 2074 * No target device for this command exists, 2075 * so we must not still own the command. 2076 */ 2077 printf("%s:%d:%d:%d: Is not an active device\n", 2078 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2079 cmd->device->lun); 2080 retval = SUCCESS; 2081 goto no_cmd; 2082 } 2083 2084 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 2085 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, 2086 cmd->device->channel + 'A', 2087 cmd->device->lun, 2088 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { 2089 printf("%s:%d:%d:%d: Command found on untagged queue\n", 2090 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2091 cmd->device->lun); 2092 retval = SUCCESS; 2093 goto done; 2094 } 2095 2096 /* 2097 * See if we can find a matching cmd in the pending list. 2098 */ 2099 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2100 if (pending_scb->io_ctx == cmd) 2101 break; 2102 } 2103 2104 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { 2105 2106 /* Any SCB for this device will do for a target reset */ 2107 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2108 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd), 2109 scmd_channel(cmd) + 'A', 2110 CAM_LUN_WILDCARD, 2111 SCB_LIST_NULL, ROLE_INITIATOR)) 2112 break; 2113 } 2114 } 2115 2116 if (pending_scb == NULL) { 2117 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2118 goto no_cmd; 2119 } 2120 2121 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2122 /* 2123 * We can't queue two recovery actions using the same SCB 2124 */ 2125 retval = FAILED; 2126 goto done; 2127 } 2128 2129 /* 2130 * Ensure that the card doesn't do anything 2131 * behind our back and that we didn't "just" miss 2132 * an interrupt that would affect this cmd. 2133 */ 2134 was_paused = ahc_is_paused(ahc); 2135 ahc_pause_and_flushwork(ahc); 2136 paused = TRUE; 2137 2138 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2139 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2140 goto no_cmd; 2141 } 2142 2143 printf("%s: At time of recovery, card was %spaused\n", 2144 ahc_name(ahc), was_paused ? "" : "not "); 2145 ahc_dump_card_state(ahc); 2146 2147 disconnected = TRUE; 2148 if (flag == SCB_ABORT) { 2149 if (ahc_search_qinfifo(ahc, cmd->device->id, 2150 cmd->device->channel + 'A', 2151 cmd->device->lun, 2152 pending_scb->hscb->tag, 2153 ROLE_INITIATOR, CAM_REQ_ABORTED, 2154 SEARCH_COMPLETE) > 0) { 2155 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2156 ahc_name(ahc), cmd->device->channel, 2157 cmd->device->id, cmd->device->lun); 2158 retval = SUCCESS; 2159 goto done; 2160 } 2161 } else if (ahc_search_qinfifo(ahc, cmd->device->id, 2162 cmd->device->channel + 'A', 2163 cmd->device->lun, pending_scb->hscb->tag, 2164 ROLE_INITIATOR, /*status*/0, 2165 SEARCH_COUNT) > 0) { 2166 disconnected = FALSE; 2167 } 2168 2169 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2170 struct scb *bus_scb; 2171 2172 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); 2173 if (bus_scb == pending_scb) 2174 disconnected = FALSE; 2175 else if (flag != SCB_ABORT 2176 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid 2177 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) 2178 disconnected = FALSE; 2179 } 2180 2181 /* 2182 * At this point, pending_scb is the scb associated with the 2183 * passed in command. That command is currently active on the 2184 * bus, is in the disconnected state, or we're hoping to find 2185 * a command for the same target active on the bus to abuse to 2186 * send a BDR. Queue the appropriate message based on which of 2187 * these states we are in. 2188 */ 2189 last_phase = ahc_inb(ahc, LASTPHASE); 2190 saved_scbptr = ahc_inb(ahc, SCBPTR); 2191 active_scb_index = ahc_inb(ahc, SCB_TAG); 2192 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 2193 if (last_phase != P_BUSFREE 2194 && (pending_scb->hscb->tag == active_scb_index 2195 || (flag == SCB_DEVICE_RESET 2196 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) { 2197 2198 /* 2199 * We're active on the bus, so assert ATN 2200 * and hope that the target responds. 2201 */ 2202 pending_scb = ahc_lookup_scb(ahc, active_scb_index); 2203 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2204 ahc_outb(ahc, MSG_OUT, HOST_MSG); 2205 ahc_outb(ahc, SCSISIGO, last_phase|ATNO); 2206 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2207 wait = TRUE; 2208 } else if (disconnected) { 2209 2210 /* 2211 * Actually re-queue this SCB in an attempt 2212 * to select the device before it reconnects. 2213 * In either case (selection or reselection), 2214 * we will now issue the approprate message 2215 * to the timed-out device. 2216 * 2217 * Set the MK_MESSAGE control bit indicating 2218 * that we desire to send a message. We 2219 * also set the disconnected flag since 2220 * in the paging case there is no guarantee 2221 * that our SCB control byte matches the 2222 * version on the card. We don't want the 2223 * sequencer to abort the command thinking 2224 * an unsolicited reselection occurred. 2225 */ 2226 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2227 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2228 2229 /* 2230 * Remove any cached copy of this SCB in the 2231 * disconnected list in preparation for the 2232 * queuing of our abort SCB. We use the 2233 * same element in the SCB, SCB_NEXT, for 2234 * both the qinfifo and the disconnected list. 2235 */ 2236 ahc_search_disc_list(ahc, cmd->device->id, 2237 cmd->device->channel + 'A', 2238 cmd->device->lun, pending_scb->hscb->tag, 2239 /*stop_on_first*/TRUE, 2240 /*remove*/TRUE, 2241 /*save_state*/FALSE); 2242 2243 /* 2244 * In the non-paging case, the sequencer will 2245 * never re-reference the in-core SCB. 2246 * To make sure we are notified during 2247 * reslection, set the MK_MESSAGE flag in 2248 * the card's copy of the SCB. 2249 */ 2250 if ((ahc->flags & AHC_PAGESCBS) == 0) { 2251 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); 2252 ahc_outb(ahc, SCB_CONTROL, 2253 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); 2254 } 2255 2256 /* 2257 * Clear out any entries in the QINFIFO first 2258 * so we are the next SCB for this target 2259 * to run. 2260 */ 2261 ahc_search_qinfifo(ahc, cmd->device->id, 2262 cmd->device->channel + 'A', 2263 cmd->device->lun, SCB_LIST_NULL, 2264 ROLE_INITIATOR, CAM_REQUEUE_REQ, 2265 SEARCH_COMPLETE); 2266 ahc_qinfifo_requeue_tail(ahc, pending_scb); 2267 ahc_outb(ahc, SCBPTR, saved_scbptr); 2268 ahc_print_path(ahc, pending_scb); 2269 printf("Device is disconnected, re-queuing SCB\n"); 2270 wait = TRUE; 2271 } else { 2272 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2273 retval = FAILED; 2274 goto done; 2275 } 2276 2277no_cmd: 2278 /* 2279 * Our assumption is that if we don't have the command, no 2280 * recovery action was required, so we return success. Again, 2281 * the semantics of the mid-layer recovery engine are not 2282 * well defined, so this may change in time. 2283 */ 2284 retval = SUCCESS; 2285done: 2286 if (paused) 2287 ahc_unpause(ahc); 2288 if (wait) { 2289 DECLARE_COMPLETION_ONSTACK(done); 2290 2291 ahc->platform_data->eh_done = &done; 2292 ahc_unlock(ahc, &flags); 2293 2294 printf("Recovery code sleeping\n"); 2295 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2296 ahc_lock(ahc, &flags); 2297 ahc->platform_data->eh_done = NULL; 2298 ahc_unlock(ahc, &flags); 2299 2300 printf("Timer Expired\n"); 2301 retval = FAILED; 2302 } 2303 printf("Recovery code awake\n"); 2304 } else 2305 ahc_unlock(ahc, &flags); 2306 return (retval); 2307} 2308 2309void 2310ahc_platform_dump_card_state(struct ahc_softc *ahc) 2311{ 2312} 2313 2314static void ahc_linux_set_width(struct scsi_target *starget, int width) 2315{ 2316 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2317 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2318 struct ahc_devinfo devinfo; 2319 unsigned long flags; 2320 2321 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2322 starget->channel + 'A', ROLE_INITIATOR); 2323 ahc_lock(ahc, &flags); 2324 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); 2325 ahc_unlock(ahc, &flags); 2326} 2327 2328static void ahc_linux_set_period(struct scsi_target *starget, int period) 2329{ 2330 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2331 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2332 struct ahc_tmode_tstate *tstate; 2333 struct ahc_initiator_tinfo *tinfo 2334 = ahc_fetch_transinfo(ahc, 2335 starget->channel + 'A', 2336 shost->this_id, starget->id, &tstate); 2337 struct ahc_devinfo devinfo; 2338 unsigned int ppr_options = tinfo->goal.ppr_options; 2339 unsigned long flags; 2340 unsigned long offset = tinfo->goal.offset; 2341 struct ahc_syncrate *syncrate; 2342 2343 if (offset == 0) 2344 offset = MAX_OFFSET; 2345 2346 if (period < 9) 2347 period = 9; /* 12.5ns is our minimum */ 2348 if (period == 9) 2349 ppr_options |= MSG_EXT_PPR_DT_REQ; 2350 2351 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2352 starget->channel + 'A', ROLE_INITIATOR); 2353 2354 /* all PPR requests apart from QAS require wide transfers */ 2355 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2356 if (spi_width(starget) == 0) 2357 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2358 } 2359 2360 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2361 ahc_lock(ahc, &flags); 2362 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2363 ppr_options, AHC_TRANS_GOAL, FALSE); 2364 ahc_unlock(ahc, &flags); 2365} 2366 2367static void ahc_linux_set_offset(struct scsi_target *starget, int offset) 2368{ 2369 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2370 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2371 struct ahc_tmode_tstate *tstate; 2372 struct ahc_initiator_tinfo *tinfo 2373 = ahc_fetch_transinfo(ahc, 2374 starget->channel + 'A', 2375 shost->this_id, starget->id, &tstate); 2376 struct ahc_devinfo devinfo; 2377 unsigned int ppr_options = 0; 2378 unsigned int period = 0; 2379 unsigned long flags; 2380 struct ahc_syncrate *syncrate = NULL; 2381 2382 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2383 starget->channel + 'A', ROLE_INITIATOR); 2384 if (offset != 0) { 2385 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2386 period = tinfo->goal.period; 2387 ppr_options = tinfo->goal.ppr_options; 2388 } 2389 ahc_lock(ahc, &flags); 2390 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2391 ppr_options, AHC_TRANS_GOAL, FALSE); 2392 ahc_unlock(ahc, &flags); 2393} 2394 2395static void ahc_linux_set_dt(struct scsi_target *starget, int dt) 2396{ 2397 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2398 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2399 struct ahc_tmode_tstate *tstate; 2400 struct ahc_initiator_tinfo *tinfo 2401 = ahc_fetch_transinfo(ahc, 2402 starget->channel + 'A', 2403 shost->this_id, starget->id, &tstate); 2404 struct ahc_devinfo devinfo; 2405 unsigned int ppr_options = tinfo->goal.ppr_options 2406 & ~MSG_EXT_PPR_DT_REQ; 2407 unsigned int period = tinfo->goal.period; 2408 unsigned int width = tinfo->goal.width; 2409 unsigned long flags; 2410 struct ahc_syncrate *syncrate; 2411 2412 if (dt) { 2413 ppr_options |= MSG_EXT_PPR_DT_REQ; 2414 if (!width) 2415 ahc_linux_set_width(starget, 1); 2416 } else if (period == 9) 2417 period = 10; /* if resetting DT, period must be >= 25ns */ 2418 2419 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2420 starget->channel + 'A', ROLE_INITIATOR); 2421 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); 2422 ahc_lock(ahc, &flags); 2423 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2424 ppr_options, AHC_TRANS_GOAL, FALSE); 2425 ahc_unlock(ahc, &flags); 2426} 2427 2428 2429static void ahc_linux_get_signalling(struct Scsi_Host *shost) 2430{ 2431 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata; 2432 unsigned long flags; 2433 u8 mode; 2434 2435 if (!(ahc->features & AHC_ULTRA2)) { 2436 /* non-LVD chipset, may not have SBLKCTL reg */ 2437 spi_signalling(shost) = 2438 ahc->features & AHC_HVD ? 2439 SPI_SIGNAL_HVD : 2440 SPI_SIGNAL_SE; 2441 return; 2442 } 2443 2444 ahc_lock(ahc, &flags); 2445 ahc_pause(ahc); 2446 mode = ahc_inb(ahc, SBLKCTL); 2447 ahc_unpause(ahc); 2448 ahc_unlock(ahc, &flags); 2449 2450 if (mode & ENAB40) 2451 spi_signalling(shost) = SPI_SIGNAL_LVD; 2452 else if (mode & ENAB20) 2453 spi_signalling(shost) = SPI_SIGNAL_SE; 2454 else 2455 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2456} 2457 2458static struct spi_function_template ahc_linux_transport_functions = { 2459 .set_offset = ahc_linux_set_offset, 2460 .show_offset = 1, 2461 .set_period = ahc_linux_set_period, 2462 .show_period = 1, 2463 .set_width = ahc_linux_set_width, 2464 .show_width = 1, 2465 .set_dt = ahc_linux_set_dt, 2466 .show_dt = 1, 2467 .get_signalling = ahc_linux_get_signalling, 2468}; 2469 2470 2471 2472static int __init 2473ahc_linux_init(void) 2474{ 2475 /* 2476 * If we've been passed any parameters, process them now. 2477 */ 2478 if (aic7xxx) 2479 aic7xxx_setup(aic7xxx); 2480 2481 ahc_linux_transport_template = 2482 spi_attach_transport(&ahc_linux_transport_functions); 2483 if (!ahc_linux_transport_template) 2484 return -ENODEV; 2485 2486 scsi_transport_reserve_device(ahc_linux_transport_template, 2487 sizeof(struct ahc_linux_device)); 2488 2489 ahc_linux_pci_init(); 2490 ahc_linux_eisa_init(); 2491 return 0; 2492} 2493 2494static void 2495ahc_linux_exit(void) 2496{ 2497 ahc_linux_pci_exit(); 2498 ahc_linux_eisa_exit(); 2499 spi_release_transport(ahc_linux_transport_template); 2500} 2501 2502module_init(ahc_linux_init); 2503module_exit(ahc_linux_exit); 2504