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> 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#include <linux/slab.h> 133 134 135/* 136 * Set this to the delay in seconds after SCSI bus reset. 137 * Note, we honor this only for the initial bus reset. 138 * The scsi error recovery code performs its own bus settle 139 * delay handling for error recovery actions. 140 */ 141#ifdef CONFIG_AIC7XXX_RESET_DELAY_MS 142#define AIC7XXX_RESET_DELAY CONFIG_AIC7XXX_RESET_DELAY_MS 143#else 144#define AIC7XXX_RESET_DELAY 5000 145#endif 146 147/* 148 * Control collection of SCSI transfer statistics for the /proc filesystem. 149 * 150 * NOTE: Do NOT enable this when running on kernels version 1.2.x and below. 151 * NOTE: This does affect performance since it has to maintain statistics. 152 */ 153#ifdef CONFIG_AIC7XXX_PROC_STATS 154#define AIC7XXX_PROC_STATS 155#endif 156 157/* 158 * To change the default number of tagged transactions allowed per-device, 159 * add a line to the lilo.conf file like: 160 * append="aic7xxx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 161 * which will result in the first four devices on the first two 162 * controllers being set to a tagged queue depth of 32. 163 * 164 * The tag_commands is an array of 16 to allow for wide and twin adapters. 165 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 166 * for channel 1. 167 */ 168typedef struct { 169 uint8_t tag_commands[16]; /* Allow for wide/twin adapters. */ 170} adapter_tag_info_t; 171 172/* 173 * Modify this as you see fit for your system. 174 * 175 * 0 tagged queuing disabled 176 * 1 <= n <= 253 n == max tags ever dispatched. 177 * 178 * The driver will throttle the number of commands dispatched to a 179 * device if it returns queue full. For devices with a fixed maximum 180 * queue depth, the driver will eventually determine this depth and 181 * lock it in (a console message is printed to indicate that a lock 182 * has occurred). On some devices, queue full is returned for a temporary 183 * resource shortage. These devices will return queue full at varying 184 * depths. The driver will throttle back when the queue fulls occur and 185 * attempt to slowly increase the depth over time as the device recovers 186 * from the resource shortage. 187 * 188 * In this example, the first line will disable tagged queueing for all 189 * the devices on the first probed aic7xxx adapter. 190 * 191 * The second line enables tagged queueing with 4 commands/LUN for IDs 192 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 193 * driver to attempt to use up to 64 tags for ID 1. 194 * 195 * The third line is the same as the first line. 196 * 197 * The fourth line disables tagged queueing for devices 0 and 3. It 198 * enables tagged queueing for the other IDs, with 16 commands/LUN 199 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 200 * IDs 2, 5-7, and 9-15. 201 */ 202 203/* 204 * NOTE: The below structure is for reference only, the actual structure 205 * to modify in order to change things is just below this comment block. 206adapter_tag_info_t aic7xxx_tag_info[] = 207{ 208 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 209 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 210 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 211 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 212}; 213*/ 214 215#ifdef CONFIG_AIC7XXX_CMDS_PER_DEVICE 216#define AIC7XXX_CMDS_PER_DEVICE CONFIG_AIC7XXX_CMDS_PER_DEVICE 217#else 218#define AIC7XXX_CMDS_PER_DEVICE AHC_MAX_QUEUE 219#endif 220 221#define AIC7XXX_CONFIGED_TAG_COMMANDS { \ 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 AIC7XXX_CMDS_PER_DEVICE, AIC7XXX_CMDS_PER_DEVICE \ 230} 231 232/* 233 * By default, use the number of commands specified by 234 * the users kernel configuration. 235 */ 236static adapter_tag_info_t aic7xxx_tag_info[] = 237{ 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 {AIC7XXX_CONFIGED_TAG_COMMANDS} 254}; 255 256/* 257 * There should be a specific return value for this in scsi.h, but 258 * it seems that most drivers ignore it. 259 */ 260#define DID_UNDERFLOW DID_ERROR 261 262void 263ahc_print_path(struct ahc_softc *ahc, struct scb *scb) 264{ 265 printk("(scsi%d:%c:%d:%d): ", 266 ahc->platform_data->host->host_no, 267 scb != NULL ? SCB_GET_CHANNEL(ahc, scb) : 'X', 268 scb != NULL ? SCB_GET_TARGET(ahc, scb) : -1, 269 scb != NULL ? SCB_GET_LUN(scb) : -1); 270} 271 272 273/* 274 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 275 * has no effect on any later resets that might occur due to things like 276 * SCSI bus timeouts. 277 */ 278static uint32_t aic7xxx_no_reset; 279 280/* 281 * Should we force EXTENDED translation on a controller. 282 * 0 == Use whatever is in the SEEPROM or default to off 283 * 1 == Use whatever is in the SEEPROM or default to on 284 */ 285static uint32_t aic7xxx_extended; 286 287/* 288 * PCI bus parity checking of the Adaptec controllers. This is somewhat 289 * dubious at best. To my knowledge, this option has never actually 290 * solved a PCI parity problem, but on certain machines with broken PCI 291 * chipset configurations where stray PCI transactions with bad parity are 292 * the norm rather than the exception, the error messages can be overwelming. 293 * It's included in the driver for completeness. 294 * 0 = Shut off PCI parity check 295 * non-0 = reverse polarity pci parity checking 296 */ 297static uint32_t aic7xxx_pci_parity = ~0; 298 299/* 300 * There are lots of broken chipsets in the world. Some of them will 301 * violate the PCI spec when we issue byte sized memory writes to our 302 * controller. I/O mapped register access, if allowed by the given 303 * platform, will work in almost all cases. 304 */ 305uint32_t aic7xxx_allow_memio = ~0; 306 307/* 308 * So that we can set how long each device is given as a selection timeout. 309 * The table of values goes like this: 310 * 0 - 256ms 311 * 1 - 128ms 312 * 2 - 64ms 313 * 3 - 32ms 314 * We default to 256ms because some older devices need a longer time 315 * to respond to initial selection. 316 */ 317static uint32_t aic7xxx_seltime; 318 319/* 320 * Certain devices do not perform any aging on commands. Should the 321 * device be saturated by commands in one portion of the disk, it is 322 * possible for transactions on far away sectors to never be serviced. 323 * To handle these devices, we can periodically send an ordered tag to 324 * force all outstanding transactions to be serviced prior to a new 325 * transaction. 326 */ 327static uint32_t aic7xxx_periodic_otag; 328 329/* 330 * Module information and settable options. 331 */ 332static char *aic7xxx = NULL; 333 334MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); 335MODULE_DESCRIPTION("Adaptec AIC77XX/78XX SCSI Host Bus Adapter driver"); 336MODULE_LICENSE("Dual BSD/GPL"); 337MODULE_VERSION(AIC7XXX_DRIVER_VERSION); 338module_param(aic7xxx, charp, 0444); 339MODULE_PARM_DESC(aic7xxx, 340"period-delimited options string:\n" 341" verbose Enable verbose/diagnostic logging\n" 342" allow_memio Allow device registers to be memory mapped\n" 343" debug Bitmask of debug values to enable\n" 344" no_probe Toggle EISA/VLB controller probing\n" 345" probe_eisa_vl Toggle EISA/VLB controller probing\n" 346" no_reset Suppress initial bus resets\n" 347" extended Enable extended geometry on all controllers\n" 348" periodic_otag Send an ordered tagged transaction\n" 349" periodically to prevent tag starvation.\n" 350" This may be required by some older disk\n" 351" drives or RAID arrays.\n" 352" tag_info:<tag_str> Set per-target tag depth\n" 353" global_tag_depth:<int> Global tag depth for every target\n" 354" on every bus\n" 355" seltime:<int> Selection Timeout\n" 356" (0/256ms,1/128ms,2/64ms,3/32ms)\n" 357"\n" 358" Sample /etc/modprobe.conf line:\n" 359" Toggle EISA/VLB probing\n" 360" Set tag depth on Controller 1/Target 1 to 10 tags\n" 361" Shorten the selection timeout to 128ms\n" 362"\n" 363" options aic7xxx 'aic7xxx=probe_eisa_vl.tag_info:{{}.{.10}}.seltime:1'\n" 364); 365 366static void ahc_linux_handle_scsi_status(struct ahc_softc *, 367 struct scsi_device *, 368 struct scb *); 369static void ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, 370 struct scsi_cmnd *cmd); 371static void ahc_linux_freeze_simq(struct ahc_softc *ahc); 372static void ahc_linux_release_simq(struct ahc_softc *ahc); 373static int ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag); 374static void ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc); 375static u_int ahc_linux_user_tagdepth(struct ahc_softc *ahc, 376 struct ahc_devinfo *devinfo); 377static void ahc_linux_device_queue_depth(struct scsi_device *); 378static int ahc_linux_run_command(struct ahc_softc*, 379 struct ahc_linux_device *, 380 struct scsi_cmnd *); 381static void ahc_linux_setup_tag_info_global(char *p); 382static int aic7xxx_setup(char *s); 383 384static int ahc_linux_unit; 385 386 387/************************** OS Utility Wrappers *******************************/ 388void 389ahc_delay(long usec) 390{ 391 /* 392 * udelay on Linux can have problems for 393 * multi-millisecond waits. Wait at most 394 * 1024us per call. 395 */ 396 while (usec > 0) { 397 udelay(usec % 1024); 398 usec -= 1024; 399 } 400} 401 402/***************************** Low Level I/O **********************************/ 403uint8_t 404ahc_inb(struct ahc_softc * ahc, long port) 405{ 406 uint8_t x; 407 408 if (ahc->tag == BUS_SPACE_MEMIO) { 409 x = readb(ahc->bsh.maddr + port); 410 } else { 411 x = inb(ahc->bsh.ioport + port); 412 } 413 mb(); 414 return (x); 415} 416 417void 418ahc_outb(struct ahc_softc * ahc, long port, uint8_t val) 419{ 420 if (ahc->tag == BUS_SPACE_MEMIO) { 421 writeb(val, ahc->bsh.maddr + port); 422 } else { 423 outb(val, ahc->bsh.ioport + port); 424 } 425 mb(); 426} 427 428void 429ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count) 430{ 431 int i; 432 433 /* 434 * There is probably a more efficient way to do this on Linux 435 * but we don't use this for anything speed critical and this 436 * should work. 437 */ 438 for (i = 0; i < count; i++) 439 ahc_outb(ahc, port, *array++); 440} 441 442void 443ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count) 444{ 445 int i; 446 447 /* 448 * There is probably a more efficient way to do this on Linux 449 * but we don't use this for anything speed critical and this 450 * should work. 451 */ 452 for (i = 0; i < count; i++) 453 *array++ = ahc_inb(ahc, port); 454} 455 456/********************************* Inlines ************************************/ 457static void ahc_linux_unmap_scb(struct ahc_softc*, struct scb*); 458 459static int ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 460 struct ahc_dma_seg *sg, 461 dma_addr_t addr, bus_size_t len); 462 463static void 464ahc_linux_unmap_scb(struct ahc_softc *ahc, struct scb *scb) 465{ 466 struct scsi_cmnd *cmd; 467 468 cmd = scb->io_ctx; 469 ahc_sync_sglist(ahc, scb, BUS_DMASYNC_POSTWRITE); 470 471 scsi_dma_unmap(cmd); 472} 473 474static int 475ahc_linux_map_seg(struct ahc_softc *ahc, struct scb *scb, 476 struct ahc_dma_seg *sg, dma_addr_t addr, bus_size_t len) 477{ 478 int consumed; 479 480 if ((scb->sg_count + 1) > AHC_NSEG) 481 panic("Too few segs for dma mapping. " 482 "Increase AHC_NSEG\n"); 483 484 consumed = 1; 485 sg->addr = ahc_htole32(addr & 0xFFFFFFFF); 486 scb->platform_data->xfer_len += len; 487 488 if (sizeof(dma_addr_t) > 4 489 && (ahc->flags & AHC_39BIT_ADDRESSING) != 0) 490 len |= (addr >> 8) & AHC_SG_HIGH_ADDR_MASK; 491 492 sg->len = ahc_htole32(len); 493 return (consumed); 494} 495 496/* 497 * Return a string describing the driver. 498 */ 499static const char * 500ahc_linux_info(struct Scsi_Host *host) 501{ 502 static char buffer[512]; 503 char ahc_info[256]; 504 char *bp; 505 struct ahc_softc *ahc; 506 507 bp = &buffer[0]; 508 ahc = *(struct ahc_softc **)host->hostdata; 509 memset(bp, 0, sizeof(buffer)); 510 strcpy(bp, "Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev " AIC7XXX_DRIVER_VERSION "\n" 511 " <"); 512 strcat(bp, ahc->description); 513 strcat(bp, ">\n" 514 " "); 515 ahc_controller_info(ahc, ahc_info); 516 strcat(bp, ahc_info); 517 strcat(bp, "\n"); 518 519 return (bp); 520} 521 522/* 523 * Queue an SCB to the controller. 524 */ 525static int 526ahc_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 527{ 528 struct ahc_softc *ahc; 529 struct ahc_linux_device *dev = scsi_transport_device_data(cmd->device); 530 int rtn = SCSI_MLQUEUE_HOST_BUSY; 531 unsigned long flags; 532 533 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 534 535 ahc_lock(ahc, &flags); 536 if (ahc->platform_data->qfrozen == 0) { 537 cmd->scsi_done = scsi_done; 538 cmd->result = CAM_REQ_INPROG << 16; 539 rtn = ahc_linux_run_command(ahc, dev, cmd); 540 } 541 ahc_unlock(ahc, &flags); 542 543 return rtn; 544} 545 546static inline struct scsi_target ** 547ahc_linux_target_in_softc(struct scsi_target *starget) 548{ 549 struct ahc_softc *ahc = 550 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 551 unsigned int target_offset; 552 553 target_offset = starget->id; 554 if (starget->channel != 0) 555 target_offset += 8; 556 557 return &ahc->platform_data->starget[target_offset]; 558} 559 560static int 561ahc_linux_target_alloc(struct scsi_target *starget) 562{ 563 struct ahc_softc *ahc = 564 *((struct ahc_softc **)dev_to_shost(&starget->dev)->hostdata); 565 struct seeprom_config *sc = ahc->seep_config; 566 unsigned long flags; 567 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 568 unsigned short scsirate; 569 struct ahc_devinfo devinfo; 570 struct ahc_initiator_tinfo *tinfo; 571 struct ahc_tmode_tstate *tstate; 572 char channel = starget->channel + 'A'; 573 unsigned int our_id = ahc->our_id; 574 unsigned int target_offset; 575 576 target_offset = starget->id; 577 if (starget->channel != 0) 578 target_offset += 8; 579 580 if (starget->channel) 581 our_id = ahc->our_id_b; 582 583 ahc_lock(ahc, &flags); 584 585 BUG_ON(*ahc_targp != NULL); 586 587 *ahc_targp = starget; 588 589 if (sc) { 590 int maxsync = AHC_SYNCRATE_DT; 591 int ultra = 0; 592 int flags = sc->device_flags[target_offset]; 593 594 if (ahc->flags & AHC_NEWEEPROM_FMT) { 595 if (flags & CFSYNCHISULTRA) 596 ultra = 1; 597 } else if (flags & CFULTRAEN) 598 ultra = 1; 599 /* AIC nutcase; 10MHz appears as ultra = 1, CFXFER = 0x04 600 * change it to ultra=0, CFXFER = 0 */ 601 if(ultra && (flags & CFXFER) == 0x04) { 602 ultra = 0; 603 flags &= ~CFXFER; 604 } 605 606 if ((ahc->features & AHC_ULTRA2) != 0) { 607 scsirate = (flags & CFXFER) | (ultra ? 0x8 : 0); 608 } else { 609 scsirate = (flags & CFXFER) << 4; 610 maxsync = ultra ? AHC_SYNCRATE_ULTRA : 611 AHC_SYNCRATE_FAST; 612 } 613 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 614 if (!(flags & CFSYNCH)) 615 spi_max_offset(starget) = 0; 616 spi_min_period(starget) = 617 ahc_find_period(ahc, scsirate, maxsync); 618 619 tinfo = ahc_fetch_transinfo(ahc, channel, ahc->our_id, 620 starget->id, &tstate); 621 } 622 ahc_compile_devinfo(&devinfo, our_id, starget->id, 623 CAM_LUN_WILDCARD, channel, 624 ROLE_INITIATOR); 625 ahc_set_syncrate(ahc, &devinfo, NULL, 0, 0, 0, 626 AHC_TRANS_GOAL, /*paused*/FALSE); 627 ahc_set_width(ahc, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 628 AHC_TRANS_GOAL, /*paused*/FALSE); 629 ahc_unlock(ahc, &flags); 630 631 return 0; 632} 633 634static void 635ahc_linux_target_destroy(struct scsi_target *starget) 636{ 637 struct scsi_target **ahc_targp = ahc_linux_target_in_softc(starget); 638 639 *ahc_targp = NULL; 640} 641 642static int 643ahc_linux_slave_alloc(struct scsi_device *sdev) 644{ 645 struct ahc_softc *ahc = 646 *((struct ahc_softc **)sdev->host->hostdata); 647 struct scsi_target *starget = sdev->sdev_target; 648 struct ahc_linux_device *dev; 649 650 if (bootverbose) 651 printk("%s: Slave Alloc %d\n", ahc_name(ahc), sdev->id); 652 653 dev = scsi_transport_device_data(sdev); 654 memset(dev, 0, sizeof(*dev)); 655 656 /* 657 * We start out life using untagged 658 * transactions of which we allow one. 659 */ 660 dev->openings = 1; 661 662 /* 663 * Set maxtags to 0. This will be changed if we 664 * later determine that we are dealing with 665 * a tagged queuing capable device. 666 */ 667 dev->maxtags = 0; 668 669 spi_period(starget) = 0; 670 671 return 0; 672} 673 674static int 675ahc_linux_slave_configure(struct scsi_device *sdev) 676{ 677 struct ahc_softc *ahc; 678 679 ahc = *((struct ahc_softc **)sdev->host->hostdata); 680 681 if (bootverbose) 682 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 683 684 ahc_linux_device_queue_depth(sdev); 685 686 /* Initial Domain Validation */ 687 if (!spi_initial_dv(sdev->sdev_target)) 688 spi_dv_device(sdev); 689 690 return 0; 691} 692 693#if defined(__i386__) 694/* 695 * Return the disk geometry for the given SCSI device. 696 */ 697static int 698ahc_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 699 sector_t capacity, int geom[]) 700{ 701 uint8_t *bh; 702 int heads; 703 int sectors; 704 int cylinders; 705 int ret; 706 int extended; 707 struct ahc_softc *ahc; 708 u_int channel; 709 710 ahc = *((struct ahc_softc **)sdev->host->hostdata); 711 channel = sdev_channel(sdev); 712 713 bh = scsi_bios_ptable(bdev); 714 if (bh) { 715 ret = scsi_partsize(bh, capacity, 716 &geom[2], &geom[0], &geom[1]); 717 kfree(bh); 718 if (ret != -1) 719 return (ret); 720 } 721 heads = 64; 722 sectors = 32; 723 cylinders = aic_sector_div(capacity, heads, sectors); 724 725 if (aic7xxx_extended != 0) 726 extended = 1; 727 else if (channel == 0) 728 extended = (ahc->flags & AHC_EXTENDED_TRANS_A) != 0; 729 else 730 extended = (ahc->flags & AHC_EXTENDED_TRANS_B) != 0; 731 if (extended && cylinders >= 1024) { 732 heads = 255; 733 sectors = 63; 734 cylinders = aic_sector_div(capacity, heads, sectors); 735 } 736 geom[0] = heads; 737 geom[1] = sectors; 738 geom[2] = cylinders; 739 return (0); 740} 741#endif 742 743/* 744 * Abort the current SCSI command(s). 745 */ 746static int 747ahc_linux_abort(struct scsi_cmnd *cmd) 748{ 749 int error; 750 751 error = ahc_linux_queue_recovery_cmd(cmd, SCB_ABORT); 752 if (error != 0) 753 printk("aic7xxx_abort returns 0x%x\n", error); 754 return (error); 755} 756 757/* 758 * Attempt to send a target reset message to the device that timed out. 759 */ 760static int 761ahc_linux_dev_reset(struct scsi_cmnd *cmd) 762{ 763 int error; 764 765 error = ahc_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); 766 if (error != 0) 767 printk("aic7xxx_dev_reset returns 0x%x\n", error); 768 return (error); 769} 770 771/* 772 * Reset the SCSI bus. 773 */ 774static int 775ahc_linux_bus_reset(struct scsi_cmnd *cmd) 776{ 777 struct ahc_softc *ahc; 778 int found; 779 unsigned long flags; 780 781 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 782 783 ahc_lock(ahc, &flags); 784 found = ahc_reset_channel(ahc, scmd_channel(cmd) + 'A', 785 /*initiate reset*/TRUE); 786 ahc_unlock(ahc, &flags); 787 788 if (bootverbose) 789 printk("%s: SCSI bus reset delivered. " 790 "%d SCBs aborted.\n", ahc_name(ahc), found); 791 792 return SUCCESS; 793} 794 795struct scsi_host_template aic7xxx_driver_template = { 796 .module = THIS_MODULE, 797 .name = "aic7xxx", 798 .proc_name = "aic7xxx", 799 .proc_info = ahc_linux_proc_info, 800 .info = ahc_linux_info, 801 .queuecommand = ahc_linux_queue, 802 .eh_abort_handler = ahc_linux_abort, 803 .eh_device_reset_handler = ahc_linux_dev_reset, 804 .eh_bus_reset_handler = ahc_linux_bus_reset, 805#if defined(__i386__) 806 .bios_param = ahc_linux_biosparam, 807#endif 808 .can_queue = AHC_MAX_QUEUE, 809 .this_id = -1, 810 .max_sectors = 8192, 811 .cmd_per_lun = 2, 812 .use_clustering = ENABLE_CLUSTERING, 813 .slave_alloc = ahc_linux_slave_alloc, 814 .slave_configure = ahc_linux_slave_configure, 815 .target_alloc = ahc_linux_target_alloc, 816 .target_destroy = ahc_linux_target_destroy, 817}; 818 819/**************************** Tasklet Handler *********************************/ 820 821/******************************** Macros **************************************/ 822#define BUILD_SCSIID(ahc, cmd) \ 823 ((((cmd)->device->id << TID_SHIFT) & TID) \ 824 | (((cmd)->device->channel == 0) ? (ahc)->our_id : (ahc)->our_id_b) \ 825 | (((cmd)->device->channel == 0) ? 0 : TWIN_CHNLB)) 826 827/******************************** Bus DMA *************************************/ 828int 829ahc_dma_tag_create(struct ahc_softc *ahc, bus_dma_tag_t parent, 830 bus_size_t alignment, bus_size_t boundary, 831 dma_addr_t lowaddr, dma_addr_t highaddr, 832 bus_dma_filter_t *filter, void *filterarg, 833 bus_size_t maxsize, int nsegments, 834 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 835{ 836 bus_dma_tag_t dmat; 837 838 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 839 if (dmat == NULL) 840 return (ENOMEM); 841 842 /* 843 * Linux is very simplistic about DMA memory. For now don't 844 * maintain all specification information. Once Linux supplies 845 * better facilities for doing these operations, or the 846 * needs of this particular driver change, we might need to do 847 * more here. 848 */ 849 dmat->alignment = alignment; 850 dmat->boundary = boundary; 851 dmat->maxsize = maxsize; 852 *ret_tag = dmat; 853 return (0); 854} 855 856void 857ahc_dma_tag_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat) 858{ 859 kfree(dmat); 860} 861 862int 863ahc_dmamem_alloc(struct ahc_softc *ahc, bus_dma_tag_t dmat, void** vaddr, 864 int flags, bus_dmamap_t *mapp) 865{ 866 *vaddr = pci_alloc_consistent(ahc->dev_softc, 867 dmat->maxsize, mapp); 868 if (*vaddr == NULL) 869 return ENOMEM; 870 return 0; 871} 872 873void 874ahc_dmamem_free(struct ahc_softc *ahc, bus_dma_tag_t dmat, 875 void* vaddr, bus_dmamap_t map) 876{ 877 pci_free_consistent(ahc->dev_softc, dmat->maxsize, 878 vaddr, map); 879} 880 881int 882ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map, 883 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 884 void *cb_arg, int flags) 885{ 886 /* 887 * Assume for now that this will only be used during 888 * initialization and not for per-transaction buffer mapping. 889 */ 890 bus_dma_segment_t stack_sg; 891 892 stack_sg.ds_addr = map; 893 stack_sg.ds_len = dmat->maxsize; 894 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 895 return (0); 896} 897 898void 899ahc_dmamap_destroy(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 900{ 901} 902 903int 904ahc_dmamap_unload(struct ahc_softc *ahc, bus_dma_tag_t dmat, bus_dmamap_t map) 905{ 906 /* Nothing to do */ 907 return (0); 908} 909 910static void 911ahc_linux_setup_tag_info_global(char *p) 912{ 913 int tags, i, j; 914 915 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 916 printk("Setting Global Tags= %d\n", tags); 917 918 for (i = 0; i < ARRAY_SIZE(aic7xxx_tag_info); i++) { 919 for (j = 0; j < AHC_NUM_TARGETS; j++) { 920 aic7xxx_tag_info[i].tag_commands[j] = tags; 921 } 922 } 923} 924 925static void 926ahc_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 927{ 928 929 if ((instance >= 0) && (targ >= 0) 930 && (instance < ARRAY_SIZE(aic7xxx_tag_info)) 931 && (targ < AHC_NUM_TARGETS)) { 932 aic7xxx_tag_info[instance].tag_commands[targ] = value & 0xff; 933 if (bootverbose) 934 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 935 } 936} 937 938static char * 939ahc_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 940 void (*callback)(u_long, int, int, int32_t), 941 u_long callback_arg) 942{ 943 char *tok_end; 944 char *tok_end2; 945 int i; 946 int instance; 947 int targ; 948 int done; 949 char tok_list[] = {'.', ',', '{', '}', '\0'}; 950 951 /* All options use a ':' name/arg separator */ 952 if (*opt_arg != ':') 953 return (opt_arg); 954 opt_arg++; 955 instance = -1; 956 targ = -1; 957 done = FALSE; 958 /* 959 * Restore separator that may be in 960 * the middle of our option argument. 961 */ 962 tok_end = strchr(opt_arg, '\0'); 963 if (tok_end < end) 964 *tok_end = ','; 965 while (!done) { 966 switch (*opt_arg) { 967 case '{': 968 if (instance == -1) { 969 instance = 0; 970 } else { 971 if (depth > 1) { 972 if (targ == -1) 973 targ = 0; 974 } else { 975 printk("Malformed Option %s\n", 976 opt_name); 977 done = TRUE; 978 } 979 } 980 opt_arg++; 981 break; 982 case '}': 983 if (targ != -1) 984 targ = -1; 985 else if (instance != -1) 986 instance = -1; 987 opt_arg++; 988 break; 989 case ',': 990 case '.': 991 if (instance == -1) 992 done = TRUE; 993 else if (targ >= 0) 994 targ++; 995 else if (instance >= 0) 996 instance++; 997 opt_arg++; 998 break; 999 case '\0': 1000 done = TRUE; 1001 break; 1002 default: 1003 tok_end = end; 1004 for (i = 0; tok_list[i]; i++) { 1005 tok_end2 = strchr(opt_arg, tok_list[i]); 1006 if ((tok_end2) && (tok_end2 < tok_end)) 1007 tok_end = tok_end2; 1008 } 1009 callback(callback_arg, instance, targ, 1010 simple_strtol(opt_arg, NULL, 0)); 1011 opt_arg = tok_end; 1012 break; 1013 } 1014 } 1015 return (opt_arg); 1016} 1017 1018/* 1019 * Handle Linux boot parameters. This routine allows for assigning a value 1020 * to a parameter with a ':' between the parameter and the value. 1021 * ie. aic7xxx=stpwlev:1,extended 1022 */ 1023static int 1024aic7xxx_setup(char *s) 1025{ 1026 int i, n; 1027 char *p; 1028 char *end; 1029 1030 static const struct { 1031 const char *name; 1032 uint32_t *flag; 1033 } options[] = { 1034 { "extended", &aic7xxx_extended }, 1035 { "no_reset", &aic7xxx_no_reset }, 1036 { "verbose", &aic7xxx_verbose }, 1037 { "allow_memio", &aic7xxx_allow_memio}, 1038#ifdef AHC_DEBUG 1039 { "debug", &ahc_debug }, 1040#endif 1041 { "periodic_otag", &aic7xxx_periodic_otag }, 1042 { "pci_parity", &aic7xxx_pci_parity }, 1043 { "seltime", &aic7xxx_seltime }, 1044 { "tag_info", NULL }, 1045 { "global_tag_depth", NULL }, 1046 { "dv", NULL } 1047 }; 1048 1049 end = strchr(s, '\0'); 1050 1051 n = 0; 1052 1053 while ((p = strsep(&s, ",.")) != NULL) { 1054 if (*p == '\0') 1055 continue; 1056 for (i = 0; i < ARRAY_SIZE(options); i++) { 1057 1058 n = strlen(options[i].name); 1059 if (strncmp(options[i].name, p, n) == 0) 1060 break; 1061 } 1062 if (i == ARRAY_SIZE(options)) 1063 continue; 1064 1065 if (strncmp(p, "global_tag_depth", n) == 0) { 1066 ahc_linux_setup_tag_info_global(p + n); 1067 } else if (strncmp(p, "tag_info", n) == 0) { 1068 s = ahc_parse_brace_option("tag_info", p + n, end, 1069 2, ahc_linux_setup_tag_info, 0); 1070 } else if (p[n] == ':') { 1071 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1072 } else if (strncmp(p, "verbose", n) == 0) { 1073 *(options[i].flag) = 1; 1074 } else { 1075 *(options[i].flag) ^= 0xFFFFFFFF; 1076 } 1077 } 1078 return 1; 1079} 1080 1081__setup("aic7xxx=", aic7xxx_setup); 1082 1083uint32_t aic7xxx_verbose; 1084 1085int 1086ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template) 1087{ 1088 char buf[80]; 1089 struct Scsi_Host *host; 1090 char *new_name; 1091 u_long s; 1092 int retval; 1093 1094 template->name = ahc->description; 1095 host = scsi_host_alloc(template, sizeof(struct ahc_softc *)); 1096 if (host == NULL) 1097 return (ENOMEM); 1098 1099 *((struct ahc_softc **)host->hostdata) = ahc; 1100 ahc->platform_data->host = host; 1101 host->can_queue = AHC_MAX_QUEUE; 1102 host->cmd_per_lun = 2; 1103 host->this_id = ahc->our_id; 1104 host->irq = ahc->platform_data->irq; 1105 host->max_id = (ahc->features & AHC_WIDE) ? 16 : 8; 1106 host->max_lun = AHC_NUM_LUNS; 1107 host->max_channel = (ahc->features & AHC_TWIN) ? 1 : 0; 1108 host->sg_tablesize = AHC_NSEG; 1109 ahc_lock(ahc, &s); 1110 ahc_set_unit(ahc, ahc_linux_unit++); 1111 ahc_unlock(ahc, &s); 1112 sprintf(buf, "scsi%d", host->host_no); 1113 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1114 if (new_name != NULL) { 1115 strcpy(new_name, buf); 1116 ahc_set_name(ahc, new_name); 1117 } 1118 host->unique_id = ahc->unit; 1119 ahc_linux_initialize_scsi_bus(ahc); 1120 ahc_intr_enable(ahc, TRUE); 1121 1122 host->transportt = ahc_linux_transport_template; 1123 1124 retval = scsi_add_host(host, 1125 (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); 1126 if (retval) { 1127 printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n"); 1128 scsi_host_put(host); 1129 return retval; 1130 } 1131 1132 scsi_scan_host(host); 1133 return 0; 1134} 1135 1136/* 1137 * Place the SCSI bus into a known state by either resetting it, 1138 * or forcing transfer negotiations on the next command to any 1139 * target. 1140 */ 1141void 1142ahc_linux_initialize_scsi_bus(struct ahc_softc *ahc) 1143{ 1144 int i; 1145 int numtarg; 1146 unsigned long s; 1147 1148 i = 0; 1149 numtarg = 0; 1150 1151 ahc_lock(ahc, &s); 1152 1153 if (aic7xxx_no_reset != 0) 1154 ahc->flags &= ~(AHC_RESET_BUS_A|AHC_RESET_BUS_B); 1155 1156 if ((ahc->flags & AHC_RESET_BUS_A) != 0) 1157 ahc_reset_channel(ahc, 'A', /*initiate_reset*/TRUE); 1158 else 1159 numtarg = (ahc->features & AHC_WIDE) ? 16 : 8; 1160 1161 if ((ahc->features & AHC_TWIN) != 0) { 1162 1163 if ((ahc->flags & AHC_RESET_BUS_B) != 0) { 1164 ahc_reset_channel(ahc, 'B', /*initiate_reset*/TRUE); 1165 } else { 1166 if (numtarg == 0) 1167 i = 8; 1168 numtarg += 8; 1169 } 1170 } 1171 1172 /* 1173 * Force negotiation to async for all targets that 1174 * will not see an initial bus reset. 1175 */ 1176 for (; i < numtarg; i++) { 1177 struct ahc_devinfo devinfo; 1178 struct ahc_initiator_tinfo *tinfo; 1179 struct ahc_tmode_tstate *tstate; 1180 u_int our_id; 1181 u_int target_id; 1182 char channel; 1183 1184 channel = 'A'; 1185 our_id = ahc->our_id; 1186 target_id = i; 1187 if (i > 7 && (ahc->features & AHC_TWIN) != 0) { 1188 channel = 'B'; 1189 our_id = ahc->our_id_b; 1190 target_id = i % 8; 1191 } 1192 tinfo = ahc_fetch_transinfo(ahc, channel, our_id, 1193 target_id, &tstate); 1194 ahc_compile_devinfo(&devinfo, our_id, target_id, 1195 CAM_LUN_WILDCARD, channel, ROLE_INITIATOR); 1196 ahc_update_neg_request(ahc, &devinfo, tstate, 1197 tinfo, AHC_NEG_ALWAYS); 1198 } 1199 ahc_unlock(ahc, &s); 1200 /* Give the bus some time to recover */ 1201 if ((ahc->flags & (AHC_RESET_BUS_A|AHC_RESET_BUS_B)) != 0) { 1202 ahc_linux_freeze_simq(ahc); 1203 msleep(AIC7XXX_RESET_DELAY); 1204 ahc_linux_release_simq(ahc); 1205 } 1206} 1207 1208int 1209ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg) 1210{ 1211 1212 ahc->platform_data = 1213 kmalloc(sizeof(struct ahc_platform_data), GFP_ATOMIC); 1214 if (ahc->platform_data == NULL) 1215 return (ENOMEM); 1216 memset(ahc->platform_data, 0, sizeof(struct ahc_platform_data)); 1217 ahc->platform_data->irq = AHC_LINUX_NOIRQ; 1218 ahc_lockinit(ahc); 1219 ahc->seltime = (aic7xxx_seltime & 0x3) << 4; 1220 ahc->seltime_b = (aic7xxx_seltime & 0x3) << 4; 1221 if (aic7xxx_pci_parity == 0) 1222 ahc->flags |= AHC_DISABLE_PCI_PERR; 1223 1224 return (0); 1225} 1226 1227void 1228ahc_platform_free(struct ahc_softc *ahc) 1229{ 1230 struct scsi_target *starget; 1231 int i; 1232 1233 if (ahc->platform_data != NULL) { 1234 /* destroy all of the device and target objects */ 1235 for (i = 0; i < AHC_NUM_TARGETS; i++) { 1236 starget = ahc->platform_data->starget[i]; 1237 if (starget != NULL) { 1238 ahc->platform_data->starget[i] = NULL; 1239 } 1240 } 1241 1242 if (ahc->platform_data->irq != AHC_LINUX_NOIRQ) 1243 free_irq(ahc->platform_data->irq, ahc); 1244 if (ahc->tag == BUS_SPACE_PIO 1245 && ahc->bsh.ioport != 0) 1246 release_region(ahc->bsh.ioport, 256); 1247 if (ahc->tag == BUS_SPACE_MEMIO 1248 && ahc->bsh.maddr != NULL) { 1249 iounmap(ahc->bsh.maddr); 1250 release_mem_region(ahc->platform_data->mem_busaddr, 1251 0x1000); 1252 } 1253 1254 if (ahc->platform_data->host) 1255 scsi_host_put(ahc->platform_data->host); 1256 1257 kfree(ahc->platform_data); 1258 } 1259} 1260 1261void 1262ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb) 1263{ 1264 ahc_platform_abort_scbs(ahc, SCB_GET_TARGET(ahc, scb), 1265 SCB_GET_CHANNEL(ahc, scb), 1266 SCB_GET_LUN(scb), SCB_LIST_NULL, 1267 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1268} 1269 1270void 1271ahc_platform_set_tags(struct ahc_softc *ahc, struct scsi_device *sdev, 1272 struct ahc_devinfo *devinfo, ahc_queue_alg alg) 1273{ 1274 struct ahc_linux_device *dev; 1275 int was_queuing; 1276 int now_queuing; 1277 1278 if (sdev == NULL) 1279 return; 1280 dev = scsi_transport_device_data(sdev); 1281 1282 was_queuing = dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED); 1283 switch (alg) { 1284 default: 1285 case AHC_QUEUE_NONE: 1286 now_queuing = 0; 1287 break; 1288 case AHC_QUEUE_BASIC: 1289 now_queuing = AHC_DEV_Q_BASIC; 1290 break; 1291 case AHC_QUEUE_TAGGED: 1292 now_queuing = AHC_DEV_Q_TAGGED; 1293 break; 1294 } 1295 if ((dev->flags & AHC_DEV_FREEZE_TIL_EMPTY) == 0 1296 && (was_queuing != now_queuing) 1297 && (dev->active != 0)) { 1298 dev->flags |= AHC_DEV_FREEZE_TIL_EMPTY; 1299 dev->qfrozen++; 1300 } 1301 1302 dev->flags &= ~(AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED|AHC_DEV_PERIODIC_OTAG); 1303 if (now_queuing) { 1304 u_int usertags; 1305 1306 usertags = ahc_linux_user_tagdepth(ahc, devinfo); 1307 if (!was_queuing) { 1308 /* 1309 * Start out agressively and allow our 1310 * dynamic queue depth algorithm to take 1311 * care of the rest. 1312 */ 1313 dev->maxtags = usertags; 1314 dev->openings = dev->maxtags - dev->active; 1315 } 1316 if (dev->maxtags == 0) { 1317 /* 1318 * Queueing is disabled by the user. 1319 */ 1320 dev->openings = 1; 1321 } else if (alg == AHC_QUEUE_TAGGED) { 1322 dev->flags |= AHC_DEV_Q_TAGGED; 1323 if (aic7xxx_periodic_otag != 0) 1324 dev->flags |= AHC_DEV_PERIODIC_OTAG; 1325 } else 1326 dev->flags |= AHC_DEV_Q_BASIC; 1327 } else { 1328 /* We can only have one opening. */ 1329 dev->maxtags = 0; 1330 dev->openings = 1 - dev->active; 1331 } 1332 switch ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED))) { 1333 case AHC_DEV_Q_BASIC: 1334 scsi_set_tag_type(sdev, MSG_SIMPLE_TAG); 1335 scsi_activate_tcq(sdev, dev->openings + dev->active); 1336 break; 1337 case AHC_DEV_Q_TAGGED: 1338 scsi_set_tag_type(sdev, MSG_ORDERED_TAG); 1339 scsi_activate_tcq(sdev, dev->openings + dev->active); 1340 break; 1341 default: 1342 /* 1343 * We allow the OS to queue 2 untagged transactions to 1344 * us at any time even though we can only execute them 1345 * serially on the controller/device. This should 1346 * remove some latency. 1347 */ 1348 scsi_deactivate_tcq(sdev, 2); 1349 break; 1350 } 1351} 1352 1353int 1354ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, char channel, 1355 int lun, u_int tag, role_t role, uint32_t status) 1356{ 1357 return 0; 1358} 1359 1360static u_int 1361ahc_linux_user_tagdepth(struct ahc_softc *ahc, struct ahc_devinfo *devinfo) 1362{ 1363 static int warned_user; 1364 u_int tags; 1365 1366 tags = 0; 1367 if ((ahc->user_discenable & devinfo->target_mask) != 0) { 1368 if (ahc->unit >= ARRAY_SIZE(aic7xxx_tag_info)) { 1369 if (warned_user == 0) { 1370 1371 printk(KERN_WARNING 1372"aic7xxx: WARNING: Insufficient tag_info instances\n" 1373"aic7xxx: for installed controllers. Using defaults\n" 1374"aic7xxx: Please update the aic7xxx_tag_info array in\n" 1375"aic7xxx: the aic7xxx_osm..c source file.\n"); 1376 warned_user++; 1377 } 1378 tags = AHC_MAX_QUEUE; 1379 } else { 1380 adapter_tag_info_t *tag_info; 1381 1382 tag_info = &aic7xxx_tag_info[ahc->unit]; 1383 tags = tag_info->tag_commands[devinfo->target_offset]; 1384 if (tags > AHC_MAX_QUEUE) 1385 tags = AHC_MAX_QUEUE; 1386 } 1387 } 1388 return (tags); 1389} 1390 1391/* 1392 * Determines the queue depth for a given device. 1393 */ 1394static void 1395ahc_linux_device_queue_depth(struct scsi_device *sdev) 1396{ 1397 struct ahc_devinfo devinfo; 1398 u_int tags; 1399 struct ahc_softc *ahc = *((struct ahc_softc **)sdev->host->hostdata); 1400 1401 ahc_compile_devinfo(&devinfo, 1402 sdev->sdev_target->channel == 0 1403 ? ahc->our_id : ahc->our_id_b, 1404 sdev->sdev_target->id, sdev->lun, 1405 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1406 ROLE_INITIATOR); 1407 tags = ahc_linux_user_tagdepth(ahc, &devinfo); 1408 if (tags != 0 && sdev->tagged_supported != 0) { 1409 1410 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_TAGGED); 1411 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1412 devinfo.lun, AC_TRANSFER_NEG); 1413 ahc_print_devinfo(ahc, &devinfo); 1414 printk("Tagged Queuing enabled. Depth %d\n", tags); 1415 } else { 1416 ahc_platform_set_tags(ahc, sdev, &devinfo, AHC_QUEUE_NONE); 1417 ahc_send_async(ahc, devinfo.channel, devinfo.target, 1418 devinfo.lun, AC_TRANSFER_NEG); 1419 } 1420} 1421 1422static int 1423ahc_linux_run_command(struct ahc_softc *ahc, struct ahc_linux_device *dev, 1424 struct scsi_cmnd *cmd) 1425{ 1426 struct scb *scb; 1427 struct hardware_scb *hscb; 1428 struct ahc_initiator_tinfo *tinfo; 1429 struct ahc_tmode_tstate *tstate; 1430 uint16_t mask; 1431 struct scb_tailq *untagged_q = NULL; 1432 int nseg; 1433 1434 /* 1435 * Schedule us to run later. The only reason we are not 1436 * running is because the whole controller Q is frozen. 1437 */ 1438 if (ahc->platform_data->qfrozen != 0) 1439 return SCSI_MLQUEUE_HOST_BUSY; 1440 1441 /* 1442 * We only allow one untagged transaction 1443 * per target in the initiator role unless 1444 * we are storing a full busy target *lun* 1445 * table in SCB space. 1446 */ 1447 if (!blk_rq_tagged(cmd->request) 1448 && (ahc->features & AHC_SCB_BTT) == 0) { 1449 int target_offset; 1450 1451 target_offset = cmd->device->id + cmd->device->channel * 8; 1452 untagged_q = &(ahc->untagged_queues[target_offset]); 1453 if (!TAILQ_EMPTY(untagged_q)) 1454 /* if we're already executing an untagged command 1455 * we're busy to another */ 1456 return SCSI_MLQUEUE_DEVICE_BUSY; 1457 } 1458 1459 nseg = scsi_dma_map(cmd); 1460 if (nseg < 0) 1461 return SCSI_MLQUEUE_HOST_BUSY; 1462 1463 /* 1464 * Get an scb to use. 1465 */ 1466 scb = ahc_get_scb(ahc); 1467 if (!scb) { 1468 scsi_dma_unmap(cmd); 1469 return SCSI_MLQUEUE_HOST_BUSY; 1470 } 1471 1472 scb->io_ctx = cmd; 1473 scb->platform_data->dev = dev; 1474 hscb = scb->hscb; 1475 cmd->host_scribble = (char *)scb; 1476 1477 /* 1478 * Fill out basics of the HSCB. 1479 */ 1480 hscb->control = 0; 1481 hscb->scsiid = BUILD_SCSIID(ahc, cmd); 1482 hscb->lun = cmd->device->lun; 1483 mask = SCB_GET_TARGET_MASK(ahc, scb); 1484 tinfo = ahc_fetch_transinfo(ahc, SCB_GET_CHANNEL(ahc, scb), 1485 SCB_GET_OUR_ID(scb), 1486 SCB_GET_TARGET(ahc, scb), &tstate); 1487 hscb->scsirate = tinfo->scsirate; 1488 hscb->scsioffset = tinfo->curr.offset; 1489 if ((tstate->ultraenb & mask) != 0) 1490 hscb->control |= ULTRAENB; 1491 1492 if ((ahc->user_discenable & mask) != 0) 1493 hscb->control |= DISCENB; 1494 1495 if ((tstate->auto_negotiate & mask) != 0) { 1496 scb->flags |= SCB_AUTO_NEGOTIATE; 1497 scb->hscb->control |= MK_MESSAGE; 1498 } 1499 1500 if ((dev->flags & (AHC_DEV_Q_TAGGED|AHC_DEV_Q_BASIC)) != 0) { 1501 int msg_bytes; 1502 uint8_t tag_msgs[2]; 1503 1504 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1505 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1506 hscb->control |= tag_msgs[0]; 1507 if (tag_msgs[0] == MSG_ORDERED_TASK) 1508 dev->commands_since_idle_or_otag = 0; 1509 } else if (dev->commands_since_idle_or_otag == AHC_OTAG_THRESH 1510 && (dev->flags & AHC_DEV_Q_TAGGED) != 0) { 1511 hscb->control |= MSG_ORDERED_TASK; 1512 dev->commands_since_idle_or_otag = 0; 1513 } else { 1514 hscb->control |= MSG_SIMPLE_TASK; 1515 } 1516 } 1517 1518 hscb->cdb_len = cmd->cmd_len; 1519 if (hscb->cdb_len <= 12) { 1520 memcpy(hscb->shared_data.cdb, cmd->cmnd, hscb->cdb_len); 1521 } else { 1522 memcpy(hscb->cdb32, cmd->cmnd, hscb->cdb_len); 1523 scb->flags |= SCB_CDB32_PTR; 1524 } 1525 1526 scb->platform_data->xfer_len = 0; 1527 ahc_set_residual(scb, 0); 1528 ahc_set_sense_residual(scb, 0); 1529 scb->sg_count = 0; 1530 1531 if (nseg > 0) { 1532 struct ahc_dma_seg *sg; 1533 struct scatterlist *cur_seg; 1534 int i; 1535 1536 /* Copy the segments into the SG list. */ 1537 sg = scb->sg_list; 1538 /* 1539 * The sg_count may be larger than nseg if 1540 * a transfer crosses a 32bit page. 1541 */ 1542 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1543 dma_addr_t addr; 1544 bus_size_t len; 1545 int consumed; 1546 1547 addr = sg_dma_address(cur_seg); 1548 len = sg_dma_len(cur_seg); 1549 consumed = ahc_linux_map_seg(ahc, scb, 1550 sg, addr, len); 1551 sg += consumed; 1552 scb->sg_count += consumed; 1553 } 1554 sg--; 1555 sg->len |= ahc_htole32(AHC_DMA_LAST_SEG); 1556 1557 /* 1558 * Reset the sg list pointer. 1559 */ 1560 scb->hscb->sgptr = 1561 ahc_htole32(scb->sg_list_phys | SG_FULL_RESID); 1562 1563 /* 1564 * Copy the first SG into the "current" 1565 * data pointer area. 1566 */ 1567 scb->hscb->dataptr = scb->sg_list->addr; 1568 scb->hscb->datacnt = scb->sg_list->len; 1569 } else { 1570 scb->hscb->sgptr = ahc_htole32(SG_LIST_NULL); 1571 scb->hscb->dataptr = 0; 1572 scb->hscb->datacnt = 0; 1573 scb->sg_count = 0; 1574 } 1575 1576 LIST_INSERT_HEAD(&ahc->pending_scbs, scb, pending_links); 1577 dev->openings--; 1578 dev->active++; 1579 dev->commands_issued++; 1580 if ((dev->flags & AHC_DEV_PERIODIC_OTAG) != 0) 1581 dev->commands_since_idle_or_otag++; 1582 1583 scb->flags |= SCB_ACTIVE; 1584 if (untagged_q) { 1585 TAILQ_INSERT_TAIL(untagged_q, scb, links.tqe); 1586 scb->flags |= SCB_UNTAGGEDQ; 1587 } 1588 ahc_queue_scb(ahc, scb); 1589 return 0; 1590} 1591 1592/* 1593 * SCSI controller interrupt handler. 1594 */ 1595irqreturn_t 1596ahc_linux_isr(int irq, void *dev_id) 1597{ 1598 struct ahc_softc *ahc; 1599 u_long flags; 1600 int ours; 1601 1602 ahc = (struct ahc_softc *) dev_id; 1603 ahc_lock(ahc, &flags); 1604 ours = ahc_intr(ahc); 1605 ahc_unlock(ahc, &flags); 1606 return IRQ_RETVAL(ours); 1607} 1608 1609void 1610ahc_platform_flushwork(struct ahc_softc *ahc) 1611{ 1612 1613} 1614 1615void 1616ahc_send_async(struct ahc_softc *ahc, char channel, 1617 u_int target, u_int lun, ac_code code) 1618{ 1619 switch (code) { 1620 case AC_TRANSFER_NEG: 1621 { 1622 char buf[80]; 1623 struct scsi_target *starget; 1624 struct ahc_linux_target *targ; 1625 struct info_str info; 1626 struct ahc_initiator_tinfo *tinfo; 1627 struct ahc_tmode_tstate *tstate; 1628 int target_offset; 1629 unsigned int target_ppr_options; 1630 1631 BUG_ON(target == CAM_TARGET_WILDCARD); 1632 1633 info.buffer = buf; 1634 info.length = sizeof(buf); 1635 info.offset = 0; 1636 info.pos = 0; 1637 tinfo = ahc_fetch_transinfo(ahc, channel, 1638 channel == 'A' ? ahc->our_id 1639 : ahc->our_id_b, 1640 target, &tstate); 1641 1642 /* 1643 * Don't bother reporting results while 1644 * negotiations are still pending. 1645 */ 1646 if (tinfo->curr.period != tinfo->goal.period 1647 || tinfo->curr.width != tinfo->goal.width 1648 || tinfo->curr.offset != tinfo->goal.offset 1649 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1650 if (bootverbose == 0) 1651 break; 1652 1653 /* 1654 * Don't bother reporting results that 1655 * are identical to those last reported. 1656 */ 1657 target_offset = target; 1658 if (channel == 'B') 1659 target_offset += 8; 1660 starget = ahc->platform_data->starget[target_offset]; 1661 if (starget == NULL) 1662 break; 1663 targ = scsi_transport_target_data(starget); 1664 1665 target_ppr_options = 1666 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1667 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1668 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0); 1669 1670 if (tinfo->curr.period == spi_period(starget) 1671 && tinfo->curr.width == spi_width(starget) 1672 && tinfo->curr.offset == spi_offset(starget) 1673 && tinfo->curr.ppr_options == target_ppr_options) 1674 if (bootverbose == 0) 1675 break; 1676 1677 spi_period(starget) = tinfo->curr.period; 1678 spi_width(starget) = tinfo->curr.width; 1679 spi_offset(starget) = tinfo->curr.offset; 1680 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1681 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1682 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1683 spi_display_xfer_agreement(starget); 1684 break; 1685 } 1686 case AC_SENT_BDR: 1687 { 1688 WARN_ON(lun != CAM_LUN_WILDCARD); 1689 scsi_report_device_reset(ahc->platform_data->host, 1690 channel - 'A', target); 1691 break; 1692 } 1693 case AC_BUS_RESET: 1694 if (ahc->platform_data->host != NULL) { 1695 scsi_report_bus_reset(ahc->platform_data->host, 1696 channel - 'A'); 1697 } 1698 break; 1699 default: 1700 panic("ahc_send_async: Unexpected async event"); 1701 } 1702} 1703 1704/* 1705 * Calls the higher level scsi done function and frees the scb. 1706 */ 1707void 1708ahc_done(struct ahc_softc *ahc, struct scb *scb) 1709{ 1710 struct scsi_cmnd *cmd; 1711 struct ahc_linux_device *dev; 1712 1713 LIST_REMOVE(scb, pending_links); 1714 if ((scb->flags & SCB_UNTAGGEDQ) != 0) { 1715 struct scb_tailq *untagged_q; 1716 int target_offset; 1717 1718 target_offset = SCB_GET_TARGET_OFFSET(ahc, scb); 1719 untagged_q = &(ahc->untagged_queues[target_offset]); 1720 TAILQ_REMOVE(untagged_q, scb, links.tqe); 1721 BUG_ON(!TAILQ_EMPTY(untagged_q)); 1722 } else if ((scb->flags & SCB_ACTIVE) == 0) { 1723 /* 1724 * Transactions aborted from the untagged queue may 1725 * not have been dispatched to the controller, so 1726 * only check the SCB_ACTIVE flag for tagged transactions. 1727 */ 1728 printk("SCB %d done'd twice\n", scb->hscb->tag); 1729 ahc_dump_card_state(ahc); 1730 panic("Stopping for safety"); 1731 } 1732 cmd = scb->io_ctx; 1733 dev = scb->platform_data->dev; 1734 dev->active--; 1735 dev->openings++; 1736 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1737 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1738 dev->qfrozen--; 1739 } 1740 ahc_linux_unmap_scb(ahc, scb); 1741 1742 /* 1743 * Guard against stale sense data. 1744 * The Linux mid-layer assumes that sense 1745 * was retrieved anytime the first byte of 1746 * the sense buffer looks "sane". 1747 */ 1748 cmd->sense_buffer[0] = 0; 1749 if (ahc_get_transaction_status(scb) == CAM_REQ_INPROG) { 1750 uint32_t amount_xferred; 1751 1752 amount_xferred = 1753 ahc_get_transfer_length(scb) - ahc_get_residual(scb); 1754 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1755#ifdef AHC_DEBUG 1756 if ((ahc_debug & AHC_SHOW_MISC) != 0) { 1757 ahc_print_path(ahc, scb); 1758 printk("Set CAM_UNCOR_PARITY\n"); 1759 } 1760#endif 1761 ahc_set_transaction_status(scb, CAM_UNCOR_PARITY); 1762#ifdef AHC_REPORT_UNDERFLOWS 1763 /* 1764 * This code is disabled by default as some 1765 * clients of the SCSI system do not properly 1766 * initialize the underflow parameter. This 1767 * results in spurious termination of commands 1768 * that complete as expected (e.g. underflow is 1769 * allowed as command can return variable amounts 1770 * of data. 1771 */ 1772 } else if (amount_xferred < scb->io_ctx->underflow) { 1773 u_int i; 1774 1775 ahc_print_path(ahc, scb); 1776 printk("CDB:"); 1777 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1778 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1779 printk("\n"); 1780 ahc_print_path(ahc, scb); 1781 printk("Saw underflow (%ld of %ld bytes). " 1782 "Treated as error\n", 1783 ahc_get_residual(scb), 1784 ahc_get_transfer_length(scb)); 1785 ahc_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1786#endif 1787 } else { 1788 ahc_set_transaction_status(scb, CAM_REQ_CMP); 1789 } 1790 } else if (ahc_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1791 ahc_linux_handle_scsi_status(ahc, cmd->device, scb); 1792 } 1793 1794 if (dev->openings == 1 1795 && ahc_get_transaction_status(scb) == CAM_REQ_CMP 1796 && ahc_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1797 dev->tag_success_count++; 1798 /* 1799 * Some devices deal with temporary internal resource 1800 * shortages by returning queue full. When the queue 1801 * full occurrs, we throttle back. Slowly try to get 1802 * back to our previous queue depth. 1803 */ 1804 if ((dev->openings + dev->active) < dev->maxtags 1805 && dev->tag_success_count > AHC_TAG_SUCCESS_INTERVAL) { 1806 dev->tag_success_count = 0; 1807 dev->openings++; 1808 } 1809 1810 if (dev->active == 0) 1811 dev->commands_since_idle_or_otag = 0; 1812 1813 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1814 printk("Recovery SCB completes\n"); 1815 if (ahc_get_transaction_status(scb) == CAM_BDR_SENT 1816 || ahc_get_transaction_status(scb) == CAM_REQ_ABORTED) 1817 ahc_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1818 1819 if (ahc->platform_data->eh_done) 1820 complete(ahc->platform_data->eh_done); 1821 } 1822 1823 ahc_free_scb(ahc, scb); 1824 ahc_linux_queue_cmd_complete(ahc, cmd); 1825} 1826 1827static void 1828ahc_linux_handle_scsi_status(struct ahc_softc *ahc, 1829 struct scsi_device *sdev, struct scb *scb) 1830{ 1831 struct ahc_devinfo devinfo; 1832 struct ahc_linux_device *dev = scsi_transport_device_data(sdev); 1833 1834 ahc_compile_devinfo(&devinfo, 1835 ahc->our_id, 1836 sdev->sdev_target->id, sdev->lun, 1837 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1838 ROLE_INITIATOR); 1839 1840 /* 1841 * We don't currently trust the mid-layer to 1842 * properly deal with queue full or busy. So, 1843 * when one occurs, we tell the mid-layer to 1844 * unconditionally requeue the command to us 1845 * so that we can retry it ourselves. We also 1846 * implement our own throttling mechanism so 1847 * we don't clobber the device with too many 1848 * commands. 1849 */ 1850 switch (ahc_get_scsi_status(scb)) { 1851 default: 1852 break; 1853 case SCSI_STATUS_CHECK_COND: 1854 case SCSI_STATUS_CMD_TERMINATED: 1855 { 1856 struct scsi_cmnd *cmd; 1857 1858 /* 1859 * Copy sense information to the OS's cmd 1860 * structure if it is available. 1861 */ 1862 cmd = scb->io_ctx; 1863 if (scb->flags & SCB_SENSE) { 1864 u_int sense_size; 1865 1866 sense_size = min(sizeof(struct scsi_sense_data) 1867 - ahc_get_sense_residual(scb), 1868 (u_long)SCSI_SENSE_BUFFERSIZE); 1869 memcpy(cmd->sense_buffer, 1870 ahc_get_sense_buf(ahc, scb), sense_size); 1871 if (sense_size < SCSI_SENSE_BUFFERSIZE) 1872 memset(&cmd->sense_buffer[sense_size], 0, 1873 SCSI_SENSE_BUFFERSIZE - sense_size); 1874 cmd->result |= (DRIVER_SENSE << 24); 1875#ifdef AHC_DEBUG 1876 if (ahc_debug & AHC_SHOW_SENSE) { 1877 int i; 1878 1879 printk("Copied %d bytes of sense data:", 1880 sense_size); 1881 for (i = 0; i < sense_size; i++) { 1882 if ((i & 0xF) == 0) 1883 printk("\n"); 1884 printk("0x%x ", cmd->sense_buffer[i]); 1885 } 1886 printk("\n"); 1887 } 1888#endif 1889 } 1890 break; 1891 } 1892 case SCSI_STATUS_QUEUE_FULL: 1893 { 1894 /* 1895 * By the time the core driver has returned this 1896 * command, all other commands that were queued 1897 * to us but not the device have been returned. 1898 * This ensures that dev->active is equal to 1899 * the number of commands actually queued to 1900 * the device. 1901 */ 1902 dev->tag_success_count = 0; 1903 if (dev->active != 0) { 1904 /* 1905 * Drop our opening count to the number 1906 * of commands currently outstanding. 1907 */ 1908 dev->openings = 0; 1909/* 1910 ahc_print_path(ahc, scb); 1911 printk("Dropping tag count to %d\n", dev->active); 1912 */ 1913 if (dev->active == dev->tags_on_last_queuefull) { 1914 1915 dev->last_queuefull_same_count++; 1916 /* 1917 * If we repeatedly see a queue full 1918 * at the same queue depth, this 1919 * device has a fixed number of tag 1920 * slots. Lock in this tag depth 1921 * so we stop seeing queue fulls from 1922 * this device. 1923 */ 1924 if (dev->last_queuefull_same_count 1925 == AHC_LOCK_TAGS_COUNT) { 1926 dev->maxtags = dev->active; 1927 ahc_print_path(ahc, scb); 1928 printk("Locking max tag count at %d\n", 1929 dev->active); 1930 } 1931 } else { 1932 dev->tags_on_last_queuefull = dev->active; 1933 dev->last_queuefull_same_count = 0; 1934 } 1935 ahc_set_transaction_status(scb, CAM_REQUEUE_REQ); 1936 ahc_set_scsi_status(scb, SCSI_STATUS_OK); 1937 ahc_platform_set_tags(ahc, sdev, &devinfo, 1938 (dev->flags & AHC_DEV_Q_BASIC) 1939 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1940 break; 1941 } 1942 /* 1943 * Drop down to a single opening, and treat this 1944 * as if the target returned BUSY SCSI status. 1945 */ 1946 dev->openings = 1; 1947 ahc_set_scsi_status(scb, SCSI_STATUS_BUSY); 1948 ahc_platform_set_tags(ahc, sdev, &devinfo, 1949 (dev->flags & AHC_DEV_Q_BASIC) 1950 ? AHC_QUEUE_BASIC : AHC_QUEUE_TAGGED); 1951 break; 1952 } 1953 } 1954} 1955 1956static void 1957ahc_linux_queue_cmd_complete(struct ahc_softc *ahc, struct scsi_cmnd *cmd) 1958{ 1959 /* 1960 * Map CAM error codes into Linux Error codes. We 1961 * avoid the conversion so that the DV code has the 1962 * full error information available when making 1963 * state change decisions. 1964 */ 1965 { 1966 u_int new_status; 1967 1968 switch (ahc_cmd_get_transaction_status(cmd)) { 1969 case CAM_REQ_INPROG: 1970 case CAM_REQ_CMP: 1971 case CAM_SCSI_STATUS_ERROR: 1972 new_status = DID_OK; 1973 break; 1974 case CAM_REQ_ABORTED: 1975 new_status = DID_ABORT; 1976 break; 1977 case CAM_BUSY: 1978 new_status = DID_BUS_BUSY; 1979 break; 1980 case CAM_REQ_INVALID: 1981 case CAM_PATH_INVALID: 1982 new_status = DID_BAD_TARGET; 1983 break; 1984 case CAM_SEL_TIMEOUT: 1985 new_status = DID_NO_CONNECT; 1986 break; 1987 case CAM_SCSI_BUS_RESET: 1988 case CAM_BDR_SENT: 1989 new_status = DID_RESET; 1990 break; 1991 case CAM_UNCOR_PARITY: 1992 new_status = DID_PARITY; 1993 break; 1994 case CAM_CMD_TIMEOUT: 1995 new_status = DID_TIME_OUT; 1996 break; 1997 case CAM_UA_ABORT: 1998 case CAM_REQ_CMP_ERR: 1999 case CAM_AUTOSENSE_FAIL: 2000 case CAM_NO_HBA: 2001 case CAM_DATA_RUN_ERR: 2002 case CAM_UNEXP_BUSFREE: 2003 case CAM_SEQUENCE_FAIL: 2004 case CAM_CCB_LEN_ERR: 2005 case CAM_PROVIDE_FAIL: 2006 case CAM_REQ_TERMIO: 2007 case CAM_UNREC_HBA_ERROR: 2008 case CAM_REQ_TOO_BIG: 2009 new_status = DID_ERROR; 2010 break; 2011 case CAM_REQUEUE_REQ: 2012 new_status = DID_REQUEUE; 2013 break; 2014 default: 2015 /* We should never get here */ 2016 new_status = DID_ERROR; 2017 break; 2018 } 2019 2020 ahc_cmd_set_transaction_status(cmd, new_status); 2021 } 2022 2023 cmd->scsi_done(cmd); 2024} 2025 2026static void 2027ahc_linux_freeze_simq(struct ahc_softc *ahc) 2028{ 2029 unsigned long s; 2030 2031 ahc_lock(ahc, &s); 2032 ahc->platform_data->qfrozen++; 2033 if (ahc->platform_data->qfrozen == 1) { 2034 scsi_block_requests(ahc->platform_data->host); 2035 2036 ahc_platform_abort_scbs(ahc, CAM_TARGET_WILDCARD, ALL_CHANNELS, 2037 CAM_LUN_WILDCARD, SCB_LIST_NULL, 2038 ROLE_INITIATOR, CAM_REQUEUE_REQ); 2039 } 2040 ahc_unlock(ahc, &s); 2041} 2042 2043static void 2044ahc_linux_release_simq(struct ahc_softc *ahc) 2045{ 2046 u_long s; 2047 int unblock_reqs; 2048 2049 unblock_reqs = 0; 2050 ahc_lock(ahc, &s); 2051 if (ahc->platform_data->qfrozen > 0) 2052 ahc->platform_data->qfrozen--; 2053 if (ahc->platform_data->qfrozen == 0) 2054 unblock_reqs = 1; 2055 ahc_unlock(ahc, &s); 2056 /* 2057 * There is still a race here. The mid-layer 2058 * should keep its own freeze count and use 2059 * a bottom half handler to run the queues 2060 * so we can unblock with our own lock held. 2061 */ 2062 if (unblock_reqs) 2063 scsi_unblock_requests(ahc->platform_data->host); 2064} 2065 2066static int 2067ahc_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) 2068{ 2069 struct ahc_softc *ahc; 2070 struct ahc_linux_device *dev; 2071 struct scb *pending_scb; 2072 u_int saved_scbptr; 2073 u_int active_scb_index; 2074 u_int last_phase; 2075 u_int saved_scsiid; 2076 u_int cdb_byte; 2077 int retval; 2078 int was_paused; 2079 int paused; 2080 int wait; 2081 int disconnected; 2082 unsigned long flags; 2083 2084 pending_scb = NULL; 2085 paused = FALSE; 2086 wait = FALSE; 2087 ahc = *(struct ahc_softc **)cmd->device->host->hostdata; 2088 2089 scmd_printk(KERN_INFO, cmd, "Attempting to queue a%s message\n", 2090 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); 2091 2092 printk("CDB:"); 2093 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2094 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2095 printk("\n"); 2096 2097 ahc_lock(ahc, &flags); 2098 2099 /* 2100 * First determine if we currently own this command. 2101 * Start by searching the device queue. If not found 2102 * there, check the pending_scb list. If not found 2103 * at all, and the system wanted us to just abort the 2104 * command, return success. 2105 */ 2106 dev = scsi_transport_device_data(cmd->device); 2107 2108 if (dev == NULL) { 2109 /* 2110 * No target device for this command exists, 2111 * so we must not still own the command. 2112 */ 2113 printk("%s:%d:%d:%d: Is not an active device\n", 2114 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2115 cmd->device->lun); 2116 retval = SUCCESS; 2117 goto no_cmd; 2118 } 2119 2120 if ((dev->flags & (AHC_DEV_Q_BASIC|AHC_DEV_Q_TAGGED)) == 0 2121 && ahc_search_untagged_queues(ahc, cmd, cmd->device->id, 2122 cmd->device->channel + 'A', 2123 cmd->device->lun, 2124 CAM_REQ_ABORTED, SEARCH_COMPLETE) != 0) { 2125 printk("%s:%d:%d:%d: Command found on untagged queue\n", 2126 ahc_name(ahc), cmd->device->channel, cmd->device->id, 2127 cmd->device->lun); 2128 retval = SUCCESS; 2129 goto done; 2130 } 2131 2132 /* 2133 * See if we can find a matching cmd in the pending list. 2134 */ 2135 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2136 if (pending_scb->io_ctx == cmd) 2137 break; 2138 } 2139 2140 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { 2141 2142 /* Any SCB for this device will do for a target reset */ 2143 LIST_FOREACH(pending_scb, &ahc->pending_scbs, pending_links) { 2144 if (ahc_match_scb(ahc, pending_scb, scmd_id(cmd), 2145 scmd_channel(cmd) + 'A', 2146 CAM_LUN_WILDCARD, 2147 SCB_LIST_NULL, ROLE_INITIATOR)) 2148 break; 2149 } 2150 } 2151 2152 if (pending_scb == NULL) { 2153 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2154 goto no_cmd; 2155 } 2156 2157 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2158 /* 2159 * We can't queue two recovery actions using the same SCB 2160 */ 2161 retval = FAILED; 2162 goto done; 2163 } 2164 2165 /* 2166 * Ensure that the card doesn't do anything 2167 * behind our back and that we didn't "just" miss 2168 * an interrupt that would affect this cmd. 2169 */ 2170 was_paused = ahc_is_paused(ahc); 2171 ahc_pause_and_flushwork(ahc); 2172 paused = TRUE; 2173 2174 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2175 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2176 goto no_cmd; 2177 } 2178 2179 printk("%s: At time of recovery, card was %spaused\n", 2180 ahc_name(ahc), was_paused ? "" : "not "); 2181 ahc_dump_card_state(ahc); 2182 2183 disconnected = TRUE; 2184 if (flag == SCB_ABORT) { 2185 if (ahc_search_qinfifo(ahc, cmd->device->id, 2186 cmd->device->channel + 'A', 2187 cmd->device->lun, 2188 pending_scb->hscb->tag, 2189 ROLE_INITIATOR, CAM_REQ_ABORTED, 2190 SEARCH_COMPLETE) > 0) { 2191 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2192 ahc_name(ahc), cmd->device->channel, 2193 cmd->device->id, cmd->device->lun); 2194 retval = SUCCESS; 2195 goto done; 2196 } 2197 } else if (ahc_search_qinfifo(ahc, cmd->device->id, 2198 cmd->device->channel + 'A', 2199 cmd->device->lun, pending_scb->hscb->tag, 2200 ROLE_INITIATOR, /*status*/0, 2201 SEARCH_COUNT) > 0) { 2202 disconnected = FALSE; 2203 } 2204 2205 if (disconnected && (ahc_inb(ahc, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2206 struct scb *bus_scb; 2207 2208 bus_scb = ahc_lookup_scb(ahc, ahc_inb(ahc, SCB_TAG)); 2209 if (bus_scb == pending_scb) 2210 disconnected = FALSE; 2211 else if (flag != SCB_ABORT 2212 && ahc_inb(ahc, SAVED_SCSIID) == pending_scb->hscb->scsiid 2213 && ahc_inb(ahc, SAVED_LUN) == SCB_GET_LUN(pending_scb)) 2214 disconnected = FALSE; 2215 } 2216 2217 /* 2218 * At this point, pending_scb is the scb associated with the 2219 * passed in command. That command is currently active on the 2220 * bus, is in the disconnected state, or we're hoping to find 2221 * a command for the same target active on the bus to abuse to 2222 * send a BDR. Queue the appropriate message based on which of 2223 * these states we are in. 2224 */ 2225 last_phase = ahc_inb(ahc, LASTPHASE); 2226 saved_scbptr = ahc_inb(ahc, SCBPTR); 2227 active_scb_index = ahc_inb(ahc, SCB_TAG); 2228 saved_scsiid = ahc_inb(ahc, SAVED_SCSIID); 2229 if (last_phase != P_BUSFREE 2230 && (pending_scb->hscb->tag == active_scb_index 2231 || (flag == SCB_DEVICE_RESET 2232 && SCSIID_TARGET(ahc, saved_scsiid) == scmd_id(cmd)))) { 2233 2234 /* 2235 * We're active on the bus, so assert ATN 2236 * and hope that the target responds. 2237 */ 2238 pending_scb = ahc_lookup_scb(ahc, active_scb_index); 2239 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2240 ahc_outb(ahc, MSG_OUT, HOST_MSG); 2241 ahc_outb(ahc, SCSISIGO, last_phase|ATNO); 2242 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2243 wait = TRUE; 2244 } else if (disconnected) { 2245 2246 /* 2247 * Actually re-queue this SCB in an attempt 2248 * to select the device before it reconnects. 2249 * In either case (selection or reselection), 2250 * we will now issue the approprate message 2251 * to the timed-out device. 2252 * 2253 * Set the MK_MESSAGE control bit indicating 2254 * that we desire to send a message. We 2255 * also set the disconnected flag since 2256 * in the paging case there is no guarantee 2257 * that our SCB control byte matches the 2258 * version on the card. We don't want the 2259 * sequencer to abort the command thinking 2260 * an unsolicited reselection occurred. 2261 */ 2262 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2263 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2264 2265 /* 2266 * Remove any cached copy of this SCB in the 2267 * disconnected list in preparation for the 2268 * queuing of our abort SCB. We use the 2269 * same element in the SCB, SCB_NEXT, for 2270 * both the qinfifo and the disconnected list. 2271 */ 2272 ahc_search_disc_list(ahc, cmd->device->id, 2273 cmd->device->channel + 'A', 2274 cmd->device->lun, pending_scb->hscb->tag, 2275 /*stop_on_first*/TRUE, 2276 /*remove*/TRUE, 2277 /*save_state*/FALSE); 2278 2279 /* 2280 * In the non-paging case, the sequencer will 2281 * never re-reference the in-core SCB. 2282 * To make sure we are notified during 2283 * reselection, set the MK_MESSAGE flag in 2284 * the card's copy of the SCB. 2285 */ 2286 if ((ahc->flags & AHC_PAGESCBS) == 0) { 2287 ahc_outb(ahc, SCBPTR, pending_scb->hscb->tag); 2288 ahc_outb(ahc, SCB_CONTROL, 2289 ahc_inb(ahc, SCB_CONTROL)|MK_MESSAGE); 2290 } 2291 2292 /* 2293 * Clear out any entries in the QINFIFO first 2294 * so we are the next SCB for this target 2295 * to run. 2296 */ 2297 ahc_search_qinfifo(ahc, cmd->device->id, 2298 cmd->device->channel + 'A', 2299 cmd->device->lun, SCB_LIST_NULL, 2300 ROLE_INITIATOR, CAM_REQUEUE_REQ, 2301 SEARCH_COMPLETE); 2302 ahc_qinfifo_requeue_tail(ahc, pending_scb); 2303 ahc_outb(ahc, SCBPTR, saved_scbptr); 2304 ahc_print_path(ahc, pending_scb); 2305 printk("Device is disconnected, re-queuing SCB\n"); 2306 wait = TRUE; 2307 } else { 2308 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2309 retval = FAILED; 2310 goto done; 2311 } 2312 2313no_cmd: 2314 /* 2315 * Our assumption is that if we don't have the command, no 2316 * recovery action was required, so we return success. Again, 2317 * the semantics of the mid-layer recovery engine are not 2318 * well defined, so this may change in time. 2319 */ 2320 retval = SUCCESS; 2321done: 2322 if (paused) 2323 ahc_unpause(ahc); 2324 if (wait) { 2325 DECLARE_COMPLETION_ONSTACK(done); 2326 2327 ahc->platform_data->eh_done = &done; 2328 ahc_unlock(ahc, &flags); 2329 2330 printk("Recovery code sleeping\n"); 2331 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2332 ahc_lock(ahc, &flags); 2333 ahc->platform_data->eh_done = NULL; 2334 ahc_unlock(ahc, &flags); 2335 2336 printk("Timer Expired\n"); 2337 retval = FAILED; 2338 } 2339 printk("Recovery code awake\n"); 2340 } else 2341 ahc_unlock(ahc, &flags); 2342 return (retval); 2343} 2344 2345void 2346ahc_platform_dump_card_state(struct ahc_softc *ahc) 2347{ 2348} 2349 2350static void ahc_linux_set_width(struct scsi_target *starget, int width) 2351{ 2352 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2353 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2354 struct ahc_devinfo devinfo; 2355 unsigned long flags; 2356 2357 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2358 starget->channel + 'A', ROLE_INITIATOR); 2359 ahc_lock(ahc, &flags); 2360 ahc_set_width(ahc, &devinfo, width, AHC_TRANS_GOAL, FALSE); 2361 ahc_unlock(ahc, &flags); 2362} 2363 2364static void ahc_linux_set_period(struct scsi_target *starget, int period) 2365{ 2366 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2367 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2368 struct ahc_tmode_tstate *tstate; 2369 struct ahc_initiator_tinfo *tinfo 2370 = ahc_fetch_transinfo(ahc, 2371 starget->channel + 'A', 2372 shost->this_id, starget->id, &tstate); 2373 struct ahc_devinfo devinfo; 2374 unsigned int ppr_options = tinfo->goal.ppr_options; 2375 unsigned long flags; 2376 unsigned long offset = tinfo->goal.offset; 2377 const struct ahc_syncrate *syncrate; 2378 2379 if (offset == 0) 2380 offset = MAX_OFFSET; 2381 2382 if (period < 9) 2383 period = 9; /* 12.5ns is our minimum */ 2384 if (period == 9) { 2385 if (spi_max_width(starget)) 2386 ppr_options |= MSG_EXT_PPR_DT_REQ; 2387 else 2388 /* need wide for DT and need DT for 12.5 ns */ 2389 period = 10; 2390 } 2391 2392 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2393 starget->channel + 'A', ROLE_INITIATOR); 2394 2395 /* all PPR requests apart from QAS require wide transfers */ 2396 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2397 if (spi_width(starget) == 0) 2398 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2399 } 2400 2401 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2402 ahc_lock(ahc, &flags); 2403 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2404 ppr_options, AHC_TRANS_GOAL, FALSE); 2405 ahc_unlock(ahc, &flags); 2406} 2407 2408static void ahc_linux_set_offset(struct scsi_target *starget, int offset) 2409{ 2410 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2411 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2412 struct ahc_tmode_tstate *tstate; 2413 struct ahc_initiator_tinfo *tinfo 2414 = ahc_fetch_transinfo(ahc, 2415 starget->channel + 'A', 2416 shost->this_id, starget->id, &tstate); 2417 struct ahc_devinfo devinfo; 2418 unsigned int ppr_options = 0; 2419 unsigned int period = 0; 2420 unsigned long flags; 2421 const struct ahc_syncrate *syncrate = NULL; 2422 2423 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2424 starget->channel + 'A', ROLE_INITIATOR); 2425 if (offset != 0) { 2426 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options, AHC_SYNCRATE_DT); 2427 period = tinfo->goal.period; 2428 ppr_options = tinfo->goal.ppr_options; 2429 } 2430 ahc_lock(ahc, &flags); 2431 ahc_set_syncrate(ahc, &devinfo, syncrate, period, offset, 2432 ppr_options, AHC_TRANS_GOAL, FALSE); 2433 ahc_unlock(ahc, &flags); 2434} 2435 2436static void ahc_linux_set_dt(struct scsi_target *starget, int dt) 2437{ 2438 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2439 struct ahc_softc *ahc = *((struct ahc_softc **)shost->hostdata); 2440 struct ahc_tmode_tstate *tstate; 2441 struct ahc_initiator_tinfo *tinfo 2442 = ahc_fetch_transinfo(ahc, 2443 starget->channel + 'A', 2444 shost->this_id, starget->id, &tstate); 2445 struct ahc_devinfo devinfo; 2446 unsigned int ppr_options = tinfo->goal.ppr_options 2447 & ~MSG_EXT_PPR_DT_REQ; 2448 unsigned int period = tinfo->goal.period; 2449 unsigned int width = tinfo->goal.width; 2450 unsigned long flags; 2451 const struct ahc_syncrate *syncrate; 2452 2453 if (dt && spi_max_width(starget)) { 2454 ppr_options |= MSG_EXT_PPR_DT_REQ; 2455 if (!width) 2456 ahc_linux_set_width(starget, 1); 2457 } else if (period == 9) 2458 period = 10; /* if resetting DT, period must be >= 25ns */ 2459 2460 ahc_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2461 starget->channel + 'A', ROLE_INITIATOR); 2462 syncrate = ahc_find_syncrate(ahc, &period, &ppr_options,AHC_SYNCRATE_DT); 2463 ahc_lock(ahc, &flags); 2464 ahc_set_syncrate(ahc, &devinfo, syncrate, period, tinfo->goal.offset, 2465 ppr_options, AHC_TRANS_GOAL, FALSE); 2466 ahc_unlock(ahc, &flags); 2467} 2468 2469 2470static void ahc_linux_get_signalling(struct Scsi_Host *shost) 2471{ 2472 struct ahc_softc *ahc = *(struct ahc_softc **)shost->hostdata; 2473 unsigned long flags; 2474 u8 mode; 2475 2476 if (!(ahc->features & AHC_ULTRA2)) { 2477 /* non-LVD chipset, may not have SBLKCTL reg */ 2478 spi_signalling(shost) = 2479 ahc->features & AHC_HVD ? 2480 SPI_SIGNAL_HVD : 2481 SPI_SIGNAL_SE; 2482 return; 2483 } 2484 2485 ahc_lock(ahc, &flags); 2486 ahc_pause(ahc); 2487 mode = ahc_inb(ahc, SBLKCTL); 2488 ahc_unpause(ahc); 2489 ahc_unlock(ahc, &flags); 2490 2491 if (mode & ENAB40) 2492 spi_signalling(shost) = SPI_SIGNAL_LVD; 2493 else if (mode & ENAB20) 2494 spi_signalling(shost) = SPI_SIGNAL_SE; 2495 else 2496 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2497} 2498 2499static struct spi_function_template ahc_linux_transport_functions = { 2500 .set_offset = ahc_linux_set_offset, 2501 .show_offset = 1, 2502 .set_period = ahc_linux_set_period, 2503 .show_period = 1, 2504 .set_width = ahc_linux_set_width, 2505 .show_width = 1, 2506 .set_dt = ahc_linux_set_dt, 2507 .show_dt = 1, 2508 .get_signalling = ahc_linux_get_signalling, 2509}; 2510 2511 2512 2513static int __init 2514ahc_linux_init(void) 2515{ 2516 /* 2517 * If we've been passed any parameters, process them now. 2518 */ 2519 if (aic7xxx) 2520 aic7xxx_setup(aic7xxx); 2521 2522 ahc_linux_transport_template = 2523 spi_attach_transport(&ahc_linux_transport_functions); 2524 if (!ahc_linux_transport_template) 2525 return -ENODEV; 2526 2527 scsi_transport_reserve_device(ahc_linux_transport_template, 2528 sizeof(struct ahc_linux_device)); 2529 2530 ahc_linux_pci_init(); 2531 ahc_linux_eisa_init(); 2532 return 0; 2533} 2534 2535static void 2536ahc_linux_exit(void) 2537{ 2538 ahc_linux_pci_exit(); 2539 ahc_linux_eisa_exit(); 2540 spi_release_transport(ahc_linux_transport_template); 2541} 2542 2543module_init(ahc_linux_init); 2544module_exit(ahc_linux_exit); 2545