1/* 2 * Adaptec AIC79xx device driver for Linux. 3 * 4 * $Id: aic79xx_osm.c,v 1.1.1.1 2007/08/03 18:52:57 Exp $ 5 * 6 * -------------------------------------------------------------------------- 7 * Copyright (c) 1994-2000 Justin T. Gibbs. 8 * Copyright (c) 1997-1999 Doug Ledford 9 * Copyright (c) 2000-2003 Adaptec Inc. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions, and the following disclaimer, 17 * without modification. 18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 19 * substantially similar to the "NO WARRANTY" disclaimer below 20 * ("Disclaimer") and any redistribution must be conditioned upon 21 * including a substantially similar Disclaimer requirement for further 22 * binary redistribution. 23 * 3. Neither the names of the above-listed copyright holders nor the names 24 * of any contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * Alternatively, this software may be distributed under the terms of the 28 * GNU General Public License ("GPL") version 2 as published by the Free 29 * Software Foundation. 30 * 31 * NO WARRANTY 32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 42 * POSSIBILITY OF SUCH DAMAGES. 43 */ 44 45#include "aic79xx_osm.h" 46#include "aic79xx_inline.h" 47#include <scsi/scsicam.h> 48 49static struct scsi_transport_template *ahd_linux_transport_template = NULL; 50 51#include <linux/init.h> /* __setup */ 52#include <linux/mm.h> /* For fetching system memory size */ 53#include <linux/blkdev.h> /* For block_size() */ 54#include <linux/delay.h> /* For ssleep/msleep */ 55#include <linux/device.h> 56 57/* 58 * Bucket size for counting good commands in between bad ones. 59 */ 60#define AHD_LINUX_ERR_THRESH 1000 61 62/* 63 * Set this to the delay in seconds after SCSI bus reset. 64 * Note, we honor this only for the initial bus reset. 65 * The scsi error recovery code performs its own bus settle 66 * delay handling for error recovery actions. 67 */ 68#ifdef CONFIG_AIC79XX_RESET_DELAY_MS 69#define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS 70#else 71#define AIC79XX_RESET_DELAY 5000 72#endif 73 74/* 75 * To change the default number of tagged transactions allowed per-device, 76 * add a line to the lilo.conf file like: 77 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 78 * which will result in the first four devices on the first two 79 * controllers being set to a tagged queue depth of 32. 80 * 81 * The tag_commands is an array of 16 to allow for wide and twin adapters. 82 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 83 * for channel 1. 84 */ 85typedef struct { 86 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */ 87} adapter_tag_info_t; 88 89/* 90 * Modify this as you see fit for your system. 91 * 92 * 0 tagged queuing disabled 93 * 1 <= n <= 253 n == max tags ever dispatched. 94 * 95 * The driver will throttle the number of commands dispatched to a 96 * device if it returns queue full. For devices with a fixed maximum 97 * queue depth, the driver will eventually determine this depth and 98 * lock it in (a console message is printed to indicate that a lock 99 * has occurred). On some devices, queue full is returned for a temporary 100 * resource shortage. These devices will return queue full at varying 101 * depths. The driver will throttle back when the queue fulls occur and 102 * attempt to slowly increase the depth over time as the device recovers 103 * from the resource shortage. 104 * 105 * In this example, the first line will disable tagged queueing for all 106 * the devices on the first probed aic79xx adapter. 107 * 108 * The second line enables tagged queueing with 4 commands/LUN for IDs 109 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 110 * driver to attempt to use up to 64 tags for ID 1. 111 * 112 * The third line is the same as the first line. 113 * 114 * The fourth line disables tagged queueing for devices 0 and 3. It 115 * enables tagged queueing for the other IDs, with 16 commands/LUN 116 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 117 * IDs 2, 5-7, and 9-15. 118 */ 119 120/* 121 * NOTE: The below structure is for reference only, the actual structure 122 * to modify in order to change things is just below this comment block. 123adapter_tag_info_t aic79xx_tag_info[] = 124{ 125 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 126 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 127 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 128 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 129}; 130*/ 131 132#ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE 133#define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE 134#else 135#define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE 136#endif 137 138#define AIC79XX_CONFIGED_TAG_COMMANDS { \ 139 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 140 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 141 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 142 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 143 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 144 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 145 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \ 147} 148 149/* 150 * By default, use the number of commands specified by 151 * the users kernel configuration. 152 */ 153static adapter_tag_info_t aic79xx_tag_info[] = 154{ 155 {AIC79XX_CONFIGED_TAG_COMMANDS}, 156 {AIC79XX_CONFIGED_TAG_COMMANDS}, 157 {AIC79XX_CONFIGED_TAG_COMMANDS}, 158 {AIC79XX_CONFIGED_TAG_COMMANDS}, 159 {AIC79XX_CONFIGED_TAG_COMMANDS}, 160 {AIC79XX_CONFIGED_TAG_COMMANDS}, 161 {AIC79XX_CONFIGED_TAG_COMMANDS}, 162 {AIC79XX_CONFIGED_TAG_COMMANDS}, 163 {AIC79XX_CONFIGED_TAG_COMMANDS}, 164 {AIC79XX_CONFIGED_TAG_COMMANDS}, 165 {AIC79XX_CONFIGED_TAG_COMMANDS}, 166 {AIC79XX_CONFIGED_TAG_COMMANDS}, 167 {AIC79XX_CONFIGED_TAG_COMMANDS}, 168 {AIC79XX_CONFIGED_TAG_COMMANDS}, 169 {AIC79XX_CONFIGED_TAG_COMMANDS}, 170 {AIC79XX_CONFIGED_TAG_COMMANDS} 171}; 172 173/* 174 * The I/O cell on the chip is very configurable in respect to its analog 175 * characteristics. Set the defaults here; they can be overriden with 176 * the proper insmod parameters. 177 */ 178struct ahd_linux_iocell_opts 179{ 180 uint8_t precomp; 181 uint8_t slewrate; 182 uint8_t amplitude; 183}; 184#define AIC79XX_DEFAULT_PRECOMP 0xFF 185#define AIC79XX_DEFAULT_SLEWRATE 0xFF 186#define AIC79XX_DEFAULT_AMPLITUDE 0xFF 187#define AIC79XX_DEFAULT_IOOPTS \ 188{ \ 189 AIC79XX_DEFAULT_PRECOMP, \ 190 AIC79XX_DEFAULT_SLEWRATE, \ 191 AIC79XX_DEFAULT_AMPLITUDE \ 192} 193#define AIC79XX_PRECOMP_INDEX 0 194#define AIC79XX_SLEWRATE_INDEX 1 195#define AIC79XX_AMPLITUDE_INDEX 2 196static struct ahd_linux_iocell_opts aic79xx_iocell_info[] = 197{ 198 AIC79XX_DEFAULT_IOOPTS, 199 AIC79XX_DEFAULT_IOOPTS, 200 AIC79XX_DEFAULT_IOOPTS, 201 AIC79XX_DEFAULT_IOOPTS, 202 AIC79XX_DEFAULT_IOOPTS, 203 AIC79XX_DEFAULT_IOOPTS, 204 AIC79XX_DEFAULT_IOOPTS, 205 AIC79XX_DEFAULT_IOOPTS, 206 AIC79XX_DEFAULT_IOOPTS, 207 AIC79XX_DEFAULT_IOOPTS, 208 AIC79XX_DEFAULT_IOOPTS, 209 AIC79XX_DEFAULT_IOOPTS, 210 AIC79XX_DEFAULT_IOOPTS, 211 AIC79XX_DEFAULT_IOOPTS, 212 AIC79XX_DEFAULT_IOOPTS, 213 AIC79XX_DEFAULT_IOOPTS 214}; 215 216/* 217 * There should be a specific return value for this in scsi.h, but 218 * it seems that most drivers ignore it. 219 */ 220#define DID_UNDERFLOW DID_ERROR 221 222void 223ahd_print_path(struct ahd_softc *ahd, struct scb *scb) 224{ 225 printk("(scsi%d:%c:%d:%d): ", 226 ahd->platform_data->host->host_no, 227 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X', 228 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1, 229 scb != NULL ? SCB_GET_LUN(scb) : -1); 230} 231 232 233/* 234 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 235 * has no effect on any later resets that might occur due to things like 236 * SCSI bus timeouts. 237 */ 238static uint32_t aic79xx_no_reset; 239 240/* 241 * Should we force EXTENDED translation on a controller. 242 * 0 == Use whatever is in the SEEPROM or default to off 243 * 1 == Use whatever is in the SEEPROM or default to on 244 */ 245static uint32_t aic79xx_extended; 246 247/* 248 * PCI bus parity checking of the Adaptec controllers. This is somewhat 249 * dubious at best. To my knowledge, this option has never actually 250 * solved a PCI parity problem, but on certain machines with broken PCI 251 * chipset configurations, it can generate tons of false error messages. 252 * It's included in the driver for completeness. 253 * 0 = Shut off PCI parity check 254 * non-0 = Enable PCI parity check 255 * 256 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this 257 * variable to -1 you would actually want to simply pass the variable 258 * name without a number. That will invert the 0 which will result in 259 * -1. 260 */ 261static uint32_t aic79xx_pci_parity = ~0; 262 263/* 264 * There are lots of broken chipsets in the world. Some of them will 265 * violate the PCI spec when we issue byte sized memory writes to our 266 * controller. I/O mapped register access, if allowed by the given 267 * platform, will work in almost all cases. 268 */ 269uint32_t aic79xx_allow_memio = ~0; 270 271/* 272 * So that we can set how long each device is given as a selection timeout. 273 * The table of values goes like this: 274 * 0 - 256ms 275 * 1 - 128ms 276 * 2 - 64ms 277 * 3 - 32ms 278 * We default to 256ms because some older devices need a longer time 279 * to respond to initial selection. 280 */ 281static uint32_t aic79xx_seltime; 282 283/* 284 * Certain devices do not perform any aging on commands. Should the 285 * device be saturated by commands in one portion of the disk, it is 286 * possible for transactions on far away sectors to never be serviced. 287 * To handle these devices, we can periodically send an ordered tag to 288 * force all outstanding transactions to be serviced prior to a new 289 * transaction. 290 */ 291static uint32_t aic79xx_periodic_otag; 292 293/* Some storage boxes are using an LSI chip which has a bug making it 294 * impossible to use aic79xx Rev B chip in 320 speeds. The following 295 * storage boxes have been reported to be buggy: 296 * EonStor 3U 16-Bay: U16U-G3A3 297 * EonStor 2U 12-Bay: U12U-G3A3 298 * SentinelRAID: 2500F R5 / R6 299 * SentinelRAID: 2500F R1 300 * SentinelRAID: 2500F/1500F 301 * SentinelRAID: 150F 302 * 303 * To get around this LSI bug, you can set your board to 160 mode 304 * or you can enable the SLOWCRC bit. 305 */ 306uint32_t aic79xx_slowcrc; 307 308/* 309 * Module information and settable options. 310 */ 311static char *aic79xx = NULL; 312 313MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>"); 314MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver"); 315MODULE_LICENSE("Dual BSD/GPL"); 316MODULE_VERSION(AIC79XX_DRIVER_VERSION); 317module_param(aic79xx, charp, 0444); 318MODULE_PARM_DESC(aic79xx, 319"period-delimited options string:\n" 320" verbose Enable verbose/diagnostic logging\n" 321" allow_memio Allow device registers to be memory mapped\n" 322" debug Bitmask of debug values to enable\n" 323" no_reset Supress initial bus resets\n" 324" extended Enable extended geometry on all controllers\n" 325" periodic_otag Send an ordered tagged transaction\n" 326" periodically to prevent tag starvation.\n" 327" This may be required by some older disk\n" 328" or drives/RAID arrays.\n" 329" tag_info:<tag_str> Set per-target tag depth\n" 330" global_tag_depth:<int> Global tag depth for all targets on all buses\n" 331" slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" 332" precomp:<pcomp_list> Set the signal precompensation (0-7).\n" 333" amplitude:<int> Set the signal amplitude (0-7).\n" 334" seltime:<int> Selection Timeout:\n" 335" (0/256ms,1/128ms,2/64ms,3/32ms)\n" 336" slowcrc Turn on the SLOWCRC bit (Rev B only)\n" 337"\n" 338" Sample /etc/modprobe.conf line:\n" 339" Enable verbose logging\n" 340" Set tag depth on Controller 2/Target 2 to 10 tags\n" 341" Shorten the selection timeout to 128ms\n" 342"\n" 343" options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" 344); 345 346static void ahd_linux_handle_scsi_status(struct ahd_softc *, 347 struct scsi_device *, 348 struct scb *); 349static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, 350 struct scsi_cmnd *cmd); 351static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd); 352static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); 353static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, 354 struct ahd_devinfo *devinfo); 355static void ahd_linux_device_queue_depth(struct scsi_device *); 356static int ahd_linux_run_command(struct ahd_softc*, 357 struct ahd_linux_device *, 358 struct scsi_cmnd *); 359static void ahd_linux_setup_tag_info_global(char *p); 360static int aic79xx_setup(char *c); 361static void ahd_freeze_simq(struct ahd_softc *ahd); 362static void ahd_release_simq(struct ahd_softc *ahd); 363 364static int ahd_linux_unit; 365 366 367/****************************** Inlines ***************************************/ 368static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); 369 370static __inline void 371ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) 372{ 373 struct scsi_cmnd *cmd; 374 int direction; 375 376 cmd = scb->io_ctx; 377 direction = cmd->sc_data_direction; 378 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); 379 if (cmd->use_sg != 0) { 380 struct scatterlist *sg; 381 382 sg = (struct scatterlist *)cmd->request_buffer; 383 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction); 384 } else if (cmd->request_bufflen != 0) { 385 pci_unmap_single(ahd->dev_softc, 386 scb->platform_data->buf_busaddr, 387 cmd->request_bufflen, direction); 388 } 389} 390 391/******************************** Macros **************************************/ 392#define BUILD_SCSIID(ahd, cmd) \ 393 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id) 394 395/* 396 * Return a string describing the driver. 397 */ 398static const char * 399ahd_linux_info(struct Scsi_Host *host) 400{ 401 static char buffer[512]; 402 char ahd_info[256]; 403 char *bp; 404 struct ahd_softc *ahd; 405 406 bp = &buffer[0]; 407 ahd = *(struct ahd_softc **)host->hostdata; 408 memset(bp, 0, sizeof(buffer)); 409 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev "); 410 strcat(bp, AIC79XX_DRIVER_VERSION); 411 strcat(bp, "\n"); 412 strcat(bp, " <"); 413 strcat(bp, ahd->description); 414 strcat(bp, ">\n"); 415 strcat(bp, " "); 416 ahd_controller_info(ahd, ahd_info); 417 strcat(bp, ahd_info); 418 419 return (bp); 420} 421 422/* 423 * Queue an SCB to the controller. 424 */ 425static int 426ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 427{ 428 struct ahd_softc *ahd; 429 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device); 430 int rtn = SCSI_MLQUEUE_HOST_BUSY; 431 432 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 433 434 cmd->scsi_done = scsi_done; 435 cmd->result = CAM_REQ_INPROG << 16; 436 rtn = ahd_linux_run_command(ahd, dev, cmd); 437 438 return rtn; 439} 440 441static inline struct scsi_target ** 442ahd_linux_target_in_softc(struct scsi_target *starget) 443{ 444 struct ahd_softc *ahd = 445 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 446 unsigned int target_offset; 447 448 target_offset = starget->id; 449 if (starget->channel != 0) 450 target_offset += 8; 451 452 return &ahd->platform_data->starget[target_offset]; 453} 454 455static int 456ahd_linux_target_alloc(struct scsi_target *starget) 457{ 458 struct ahd_softc *ahd = 459 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 460 struct seeprom_config *sc = ahd->seep_config; 461 unsigned long flags; 462 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 463 struct ahd_devinfo devinfo; 464 struct ahd_initiator_tinfo *tinfo; 465 struct ahd_tmode_tstate *tstate; 466 char channel = starget->channel + 'A'; 467 468 ahd_lock(ahd, &flags); 469 470 BUG_ON(*ahd_targp != NULL); 471 472 *ahd_targp = starget; 473 474 if (sc) { 475 int flags = sc->device_flags[starget->id]; 476 477 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 478 starget->id, &tstate); 479 480 if ((flags & CFPACKETIZED) == 0) { 481 /* Do not negotiate packetized transfers */ 482 spi_rd_strm(starget) = 0; 483 spi_pcomp_en(starget) = 0; 484 spi_rti(starget) = 0; 485 spi_wr_flow(starget) = 0; 486 spi_hold_mcs(starget) = 0; 487 } else { 488 if ((ahd->features & AHD_RTI) == 0) 489 spi_rti(starget) = 0; 490 } 491 492 if ((flags & CFQAS) == 0) 493 spi_qas(starget) = 0; 494 495 /* Transinfo values have been set to BIOS settings */ 496 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 497 spi_min_period(starget) = tinfo->user.period; 498 spi_max_offset(starget) = tinfo->user.offset; 499 } 500 501 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 502 starget->id, &tstate); 503 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id, 504 CAM_LUN_WILDCARD, channel, 505 ROLE_INITIATOR); 506 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, 507 AHD_TRANS_GOAL, /*paused*/FALSE); 508 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 509 AHD_TRANS_GOAL, /*paused*/FALSE); 510 ahd_unlock(ahd, &flags); 511 512 return 0; 513} 514 515static void 516ahd_linux_target_destroy(struct scsi_target *starget) 517{ 518 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 519 520 *ahd_targp = NULL; 521} 522 523static int 524ahd_linux_slave_alloc(struct scsi_device *sdev) 525{ 526 struct ahd_softc *ahd = 527 *((struct ahd_softc **)sdev->host->hostdata); 528 struct ahd_linux_device *dev; 529 530 if (bootverbose) 531 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id); 532 533 dev = scsi_transport_device_data(sdev); 534 memset(dev, 0, sizeof(*dev)); 535 536 /* 537 * We start out life using untagged 538 * transactions of which we allow one. 539 */ 540 dev->openings = 1; 541 542 /* 543 * Set maxtags to 0. This will be changed if we 544 * later determine that we are dealing with 545 * a tagged queuing capable device. 546 */ 547 dev->maxtags = 0; 548 549 return (0); 550} 551 552static int 553ahd_linux_slave_configure(struct scsi_device *sdev) 554{ 555 struct ahd_softc *ahd; 556 557 ahd = *((struct ahd_softc **)sdev->host->hostdata); 558 if (bootverbose) 559 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 560 561 ahd_linux_device_queue_depth(sdev); 562 563 /* Initial Domain Validation */ 564 if (!spi_initial_dv(sdev->sdev_target)) 565 spi_dv_device(sdev); 566 567 return 0; 568} 569 570#if defined(__i386__) 571/* 572 * Return the disk geometry for the given SCSI device. 573 */ 574static int 575ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 576 sector_t capacity, int geom[]) 577{ 578 uint8_t *bh; 579 int heads; 580 int sectors; 581 int cylinders; 582 int ret; 583 int extended; 584 struct ahd_softc *ahd; 585 586 ahd = *((struct ahd_softc **)sdev->host->hostdata); 587 588 bh = scsi_bios_ptable(bdev); 589 if (bh) { 590 ret = scsi_partsize(bh, capacity, 591 &geom[2], &geom[0], &geom[1]); 592 kfree(bh); 593 if (ret != -1) 594 return (ret); 595 } 596 heads = 64; 597 sectors = 32; 598 cylinders = aic_sector_div(capacity, heads, sectors); 599 600 if (aic79xx_extended != 0) 601 extended = 1; 602 else 603 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 604 if (extended && cylinders >= 1024) { 605 heads = 255; 606 sectors = 63; 607 cylinders = aic_sector_div(capacity, heads, sectors); 608 } 609 geom[0] = heads; 610 geom[1] = sectors; 611 geom[2] = cylinders; 612 return (0); 613} 614#endif 615 616/* 617 * Abort the current SCSI command(s). 618 */ 619static int 620ahd_linux_abort(struct scsi_cmnd *cmd) 621{ 622 int error; 623 624 error = ahd_linux_queue_abort_cmd(cmd); 625 626 return error; 627} 628 629/* 630 * Attempt to send a target reset message to the device that timed out. 631 */ 632static int 633ahd_linux_dev_reset(struct scsi_cmnd *cmd) 634{ 635 struct ahd_softc *ahd; 636 struct ahd_linux_device *dev; 637 struct scb *reset_scb; 638 u_int cdb_byte; 639 int retval = SUCCESS; 640 int paused; 641 int wait; 642 struct ahd_initiator_tinfo *tinfo; 643 struct ahd_tmode_tstate *tstate; 644 unsigned long flags; 645 DECLARE_COMPLETION_ONSTACK(done); 646 647 reset_scb = NULL; 648 paused = FALSE; 649 wait = FALSE; 650 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 651 652 scmd_printk(KERN_INFO, cmd, 653 "Attempting to queue a TARGET RESET message:"); 654 655 printf("CDB:"); 656 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 657 printf(" 0x%x", cmd->cmnd[cdb_byte]); 658 printf("\n"); 659 660 /* 661 * Determine if we currently own this command. 662 */ 663 dev = scsi_transport_device_data(cmd->device); 664 665 if (dev == NULL) { 666 /* 667 * No target device for this command exists, 668 * so we must not still own the command. 669 */ 670 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 671 return SUCCESS; 672 } 673 674 /* 675 * Generate us a new SCB 676 */ 677 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); 678 if (!reset_scb) { 679 scmd_printk(KERN_INFO, cmd, "No SCB available\n"); 680 return FAILED; 681 } 682 683 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 684 cmd->device->id, &tstate); 685 reset_scb->io_ctx = cmd; 686 reset_scb->platform_data->dev = dev; 687 reset_scb->sg_count = 0; 688 ahd_set_residual(reset_scb, 0); 689 ahd_set_sense_residual(reset_scb, 0); 690 reset_scb->platform_data->xfer_len = 0; 691 reset_scb->hscb->control = 0; 692 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd); 693 reset_scb->hscb->lun = cmd->device->lun; 694 reset_scb->hscb->cdb_len = 0; 695 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; 696 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; 697 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 698 reset_scb->flags |= SCB_PACKETIZED; 699 } else { 700 reset_scb->hscb->control |= MK_MESSAGE; 701 } 702 dev->openings--; 703 dev->active++; 704 dev->commands_issued++; 705 706 ahd_lock(ahd, &flags); 707 708 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); 709 ahd_queue_scb(ahd, reset_scb); 710 711 ahd->platform_data->eh_done = &done; 712 ahd_unlock(ahd, &flags); 713 714 printf("%s: Device reset code sleeping\n", ahd_name(ahd)); 715 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 716 ahd_lock(ahd, &flags); 717 ahd->platform_data->eh_done = NULL; 718 ahd_unlock(ahd, &flags); 719 printf("%s: Device reset timer expired (active %d)\n", 720 ahd_name(ahd), dev->active); 721 retval = FAILED; 722 } 723 printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); 724 725 return (retval); 726} 727 728/* 729 * Reset the SCSI bus. 730 */ 731static int 732ahd_linux_bus_reset(struct scsi_cmnd *cmd) 733{ 734 struct ahd_softc *ahd; 735 int found; 736 unsigned long flags; 737 738 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 739#ifdef AHD_DEBUG 740 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 741 printf("%s: Bus reset called for cmd %p\n", 742 ahd_name(ahd), cmd); 743#endif 744 ahd_lock(ahd, &flags); 745 746 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 747 /*initiate reset*/TRUE); 748 ahd_unlock(ahd, &flags); 749 750 if (bootverbose) 751 printf("%s: SCSI bus reset delivered. " 752 "%d SCBs aborted.\n", ahd_name(ahd), found); 753 754 return (SUCCESS); 755} 756 757struct scsi_host_template aic79xx_driver_template = { 758 .module = THIS_MODULE, 759 .name = "aic79xx", 760 .proc_name = "aic79xx", 761 .proc_info = ahd_linux_proc_info, 762 .info = ahd_linux_info, 763 .queuecommand = ahd_linux_queue, 764 .eh_abort_handler = ahd_linux_abort, 765 .eh_device_reset_handler = ahd_linux_dev_reset, 766 .eh_bus_reset_handler = ahd_linux_bus_reset, 767#if defined(__i386__) 768 .bios_param = ahd_linux_biosparam, 769#endif 770 .can_queue = AHD_MAX_QUEUE, 771 .this_id = -1, 772 .max_sectors = 8192, 773 .cmd_per_lun = 2, 774 .use_clustering = ENABLE_CLUSTERING, 775 .slave_alloc = ahd_linux_slave_alloc, 776 .slave_configure = ahd_linux_slave_configure, 777 .target_alloc = ahd_linux_target_alloc, 778 .target_destroy = ahd_linux_target_destroy, 779}; 780 781/******************************** Bus DMA *************************************/ 782int 783ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 784 bus_size_t alignment, bus_size_t boundary, 785 dma_addr_t lowaddr, dma_addr_t highaddr, 786 bus_dma_filter_t *filter, void *filterarg, 787 bus_size_t maxsize, int nsegments, 788 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 789{ 790 bus_dma_tag_t dmat; 791 792 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); 793 if (dmat == NULL) 794 return (ENOMEM); 795 796 /* 797 * Linux is very simplistic about DMA memory. For now don't 798 * maintain all specification information. Once Linux supplies 799 * better facilities for doing these operations, or the 800 * needs of this particular driver change, we might need to do 801 * more here. 802 */ 803 dmat->alignment = alignment; 804 dmat->boundary = boundary; 805 dmat->maxsize = maxsize; 806 *ret_tag = dmat; 807 return (0); 808} 809 810void 811ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 812{ 813 free(dmat, M_DEVBUF); 814} 815 816int 817ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 818 int flags, bus_dmamap_t *mapp) 819{ 820 *vaddr = pci_alloc_consistent(ahd->dev_softc, 821 dmat->maxsize, mapp); 822 if (*vaddr == NULL) 823 return (ENOMEM); 824 return(0); 825} 826 827void 828ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 829 void* vaddr, bus_dmamap_t map) 830{ 831 pci_free_consistent(ahd->dev_softc, dmat->maxsize, 832 vaddr, map); 833} 834 835int 836ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 837 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 838 void *cb_arg, int flags) 839{ 840 /* 841 * Assume for now that this will only be used during 842 * initialization and not for per-transaction buffer mapping. 843 */ 844 bus_dma_segment_t stack_sg; 845 846 stack_sg.ds_addr = map; 847 stack_sg.ds_len = dmat->maxsize; 848 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 849 return (0); 850} 851 852void 853ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 854{ 855} 856 857int 858ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 859{ 860 /* Nothing to do */ 861 return (0); 862} 863 864/********************* Platform Dependent Functions ***************************/ 865static void 866ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 867{ 868 869 if ((instance >= 0) 870 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { 871 uint8_t *iocell_info; 872 873 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 874 iocell_info[index] = value & 0xFFFF; 875 if (bootverbose) 876 printf("iocell[%d:%ld] = %d\n", instance, index, value); 877 } 878} 879 880static void 881ahd_linux_setup_tag_info_global(char *p) 882{ 883 int tags, i, j; 884 885 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 886 printf("Setting Global Tags= %d\n", tags); 887 888 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { 889 for (j = 0; j < AHD_NUM_TARGETS; j++) { 890 aic79xx_tag_info[i].tag_commands[j] = tags; 891 } 892 } 893} 894 895static void 896ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 897{ 898 899 if ((instance >= 0) && (targ >= 0) 900 && (instance < ARRAY_SIZE(aic79xx_tag_info)) 901 && (targ < AHD_NUM_TARGETS)) { 902 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 903 if (bootverbose) 904 printf("tag_info[%d:%d] = %d\n", instance, targ, value); 905 } 906} 907 908static char * 909ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 910 void (*callback)(u_long, int, int, int32_t), 911 u_long callback_arg) 912{ 913 char *tok_end; 914 char *tok_end2; 915 int i; 916 int instance; 917 int targ; 918 int done; 919 char tok_list[] = {'.', ',', '{', '}', '\0'}; 920 921 /* All options use a ':' name/arg separator */ 922 if (*opt_arg != ':') 923 return (opt_arg); 924 opt_arg++; 925 instance = -1; 926 targ = -1; 927 done = FALSE; 928 /* 929 * Restore separator that may be in 930 * the middle of our option argument. 931 */ 932 tok_end = strchr(opt_arg, '\0'); 933 if (tok_end < end) 934 *tok_end = ','; 935 while (!done) { 936 switch (*opt_arg) { 937 case '{': 938 if (instance == -1) { 939 instance = 0; 940 } else { 941 if (depth > 1) { 942 if (targ == -1) 943 targ = 0; 944 } else { 945 printf("Malformed Option %s\n", 946 opt_name); 947 done = TRUE; 948 } 949 } 950 opt_arg++; 951 break; 952 case '}': 953 if (targ != -1) 954 targ = -1; 955 else if (instance != -1) 956 instance = -1; 957 opt_arg++; 958 break; 959 case ',': 960 case '.': 961 if (instance == -1) 962 done = TRUE; 963 else if (targ >= 0) 964 targ++; 965 else if (instance >= 0) 966 instance++; 967 opt_arg++; 968 break; 969 case '\0': 970 done = TRUE; 971 break; 972 default: 973 tok_end = end; 974 for (i = 0; tok_list[i]; i++) { 975 tok_end2 = strchr(opt_arg, tok_list[i]); 976 if ((tok_end2) && (tok_end2 < tok_end)) 977 tok_end = tok_end2; 978 } 979 callback(callback_arg, instance, targ, 980 simple_strtol(opt_arg, NULL, 0)); 981 opt_arg = tok_end; 982 break; 983 } 984 } 985 return (opt_arg); 986} 987 988/* 989 * Handle Linux boot parameters. This routine allows for assigning a value 990 * to a parameter with a ':' between the parameter and the value. 991 * ie. aic79xx=stpwlev:1,extended 992 */ 993static int 994aic79xx_setup(char *s) 995{ 996 int i, n; 997 char *p; 998 char *end; 999 1000 static struct { 1001 const char *name; 1002 uint32_t *flag; 1003 } options[] = { 1004 { "extended", &aic79xx_extended }, 1005 { "no_reset", &aic79xx_no_reset }, 1006 { "verbose", &aic79xx_verbose }, 1007 { "allow_memio", &aic79xx_allow_memio}, 1008#ifdef AHD_DEBUG 1009 { "debug", &ahd_debug }, 1010#endif 1011 { "periodic_otag", &aic79xx_periodic_otag }, 1012 { "pci_parity", &aic79xx_pci_parity }, 1013 { "seltime", &aic79xx_seltime }, 1014 { "tag_info", NULL }, 1015 { "global_tag_depth", NULL}, 1016 { "slewrate", NULL }, 1017 { "precomp", NULL }, 1018 { "amplitude", NULL }, 1019 { "slowcrc", &aic79xx_slowcrc }, 1020 }; 1021 1022 end = strchr(s, '\0'); 1023 1024 n = 0; 1025 1026 while ((p = strsep(&s, ",.")) != NULL) { 1027 if (*p == '\0') 1028 continue; 1029 for (i = 0; i < ARRAY_SIZE(options); i++) { 1030 1031 n = strlen(options[i].name); 1032 if (strncmp(options[i].name, p, n) == 0) 1033 break; 1034 } 1035 if (i == ARRAY_SIZE(options)) 1036 continue; 1037 1038 if (strncmp(p, "global_tag_depth", n) == 0) { 1039 ahd_linux_setup_tag_info_global(p + n); 1040 } else if (strncmp(p, "tag_info", n) == 0) { 1041 s = ahd_parse_brace_option("tag_info", p + n, end, 1042 2, ahd_linux_setup_tag_info, 0); 1043 } else if (strncmp(p, "slewrate", n) == 0) { 1044 s = ahd_parse_brace_option("slewrate", 1045 p + n, end, 1, ahd_linux_setup_iocell_info, 1046 AIC79XX_SLEWRATE_INDEX); 1047 } else if (strncmp(p, "precomp", n) == 0) { 1048 s = ahd_parse_brace_option("precomp", 1049 p + n, end, 1, ahd_linux_setup_iocell_info, 1050 AIC79XX_PRECOMP_INDEX); 1051 } else if (strncmp(p, "amplitude", n) == 0) { 1052 s = ahd_parse_brace_option("amplitude", 1053 p + n, end, 1, ahd_linux_setup_iocell_info, 1054 AIC79XX_AMPLITUDE_INDEX); 1055 } else if (p[n] == ':') { 1056 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1057 } else if (!strncmp(p, "verbose", n)) { 1058 *(options[i].flag) = 1; 1059 } else { 1060 *(options[i].flag) ^= 0xFFFFFFFF; 1061 } 1062 } 1063 return 1; 1064} 1065 1066__setup("aic79xx=", aic79xx_setup); 1067 1068uint32_t aic79xx_verbose; 1069 1070int 1071ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1072{ 1073 char buf[80]; 1074 struct Scsi_Host *host; 1075 char *new_name; 1076 u_long s; 1077 int retval; 1078 1079 template->name = ahd->description; 1080 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1081 if (host == NULL) 1082 return (ENOMEM); 1083 1084 *((struct ahd_softc **)host->hostdata) = ahd; 1085 ahd->platform_data->host = host; 1086 host->can_queue = AHD_MAX_QUEUE; 1087 host->cmd_per_lun = 2; 1088 host->sg_tablesize = AHD_NSEG; 1089 host->this_id = ahd->our_id; 1090 host->irq = ahd->platform_data->irq; 1091 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1092 host->max_lun = AHD_NUM_LUNS; 1093 host->max_channel = 0; 1094 host->sg_tablesize = AHD_NSEG; 1095 ahd_lock(ahd, &s); 1096 ahd_set_unit(ahd, ahd_linux_unit++); 1097 ahd_unlock(ahd, &s); 1098 sprintf(buf, "scsi%d", host->host_no); 1099 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 1100 if (new_name != NULL) { 1101 strcpy(new_name, buf); 1102 ahd_set_name(ahd, new_name); 1103 } 1104 host->unique_id = ahd->unit; 1105 ahd_linux_initialize_scsi_bus(ahd); 1106 ahd_intr_enable(ahd, TRUE); 1107 1108 host->transportt = ahd_linux_transport_template; 1109 1110 retval = scsi_add_host(host, &ahd->dev_softc->dev); 1111 if (retval) { 1112 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); 1113 scsi_host_put(host); 1114 return retval; 1115 } 1116 1117 scsi_scan_host(host); 1118 return 0; 1119} 1120 1121/* 1122 * Place the SCSI bus into a known state by either resetting it, 1123 * or forcing transfer negotiations on the next command to any 1124 * target. 1125 */ 1126static void 1127ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1128{ 1129 u_int target_id; 1130 u_int numtarg; 1131 unsigned long s; 1132 1133 target_id = 0; 1134 numtarg = 0; 1135 1136 if (aic79xx_no_reset != 0) 1137 ahd->flags &= ~AHD_RESET_BUS_A; 1138 1139 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1140 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1141 else 1142 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1143 1144 ahd_lock(ahd, &s); 1145 1146 /* 1147 * Force negotiation to async for all targets that 1148 * will not see an initial bus reset. 1149 */ 1150 for (; target_id < numtarg; target_id++) { 1151 struct ahd_devinfo devinfo; 1152 struct ahd_initiator_tinfo *tinfo; 1153 struct ahd_tmode_tstate *tstate; 1154 1155 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1156 target_id, &tstate); 1157 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1158 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1159 ahd_update_neg_request(ahd, &devinfo, tstate, 1160 tinfo, AHD_NEG_ALWAYS); 1161 } 1162 ahd_unlock(ahd, &s); 1163 /* Give the bus some time to recover */ 1164 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1165 ahd_freeze_simq(ahd); 1166 msleep(AIC79XX_RESET_DELAY); 1167 ahd_release_simq(ahd); 1168 } 1169} 1170 1171int 1172ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1173{ 1174 ahd->platform_data = 1175 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT); 1176 if (ahd->platform_data == NULL) 1177 return (ENOMEM); 1178 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data)); 1179 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1180 ahd_lockinit(ahd); 1181 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1182 return (0); 1183} 1184 1185void 1186ahd_platform_free(struct ahd_softc *ahd) 1187{ 1188 struct scsi_target *starget; 1189 int i; 1190 1191 if (ahd->platform_data != NULL) { 1192 /* destroy all of the device and target objects */ 1193 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1194 starget = ahd->platform_data->starget[i]; 1195 if (starget != NULL) { 1196 ahd->platform_data->starget[i] = NULL; 1197 } 1198 } 1199 1200 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1201 free_irq(ahd->platform_data->irq, ahd); 1202 if (ahd->tags[0] == BUS_SPACE_PIO 1203 && ahd->bshs[0].ioport != 0) 1204 release_region(ahd->bshs[0].ioport, 256); 1205 if (ahd->tags[1] == BUS_SPACE_PIO 1206 && ahd->bshs[1].ioport != 0) 1207 release_region(ahd->bshs[1].ioport, 256); 1208 if (ahd->tags[0] == BUS_SPACE_MEMIO 1209 && ahd->bshs[0].maddr != NULL) { 1210 iounmap(ahd->bshs[0].maddr); 1211 release_mem_region(ahd->platform_data->mem_busaddr, 1212 0x1000); 1213 } 1214 if (ahd->platform_data->host) 1215 scsi_host_put(ahd->platform_data->host); 1216 1217 free(ahd->platform_data, M_DEVBUF); 1218 } 1219} 1220 1221void 1222ahd_platform_init(struct ahd_softc *ahd) 1223{ 1224 /* 1225 * Lookup and commit any modified IO Cell options. 1226 */ 1227 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 1228 struct ahd_linux_iocell_opts *iocell_opts; 1229 1230 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1231 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1232 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1233 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1234 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1235 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1236 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1237 } 1238 1239} 1240 1241void 1242ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1243{ 1244 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1245 SCB_GET_CHANNEL(ahd, scb), 1246 SCB_GET_LUN(scb), SCB_LIST_NULL, 1247 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1248} 1249 1250void 1251ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev, 1252 struct ahd_devinfo *devinfo, ahd_queue_alg alg) 1253{ 1254 struct ahd_linux_device *dev; 1255 int was_queuing; 1256 int now_queuing; 1257 1258 if (sdev == NULL) 1259 return; 1260 1261 dev = scsi_transport_device_data(sdev); 1262 1263 if (dev == NULL) 1264 return; 1265 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1266 switch (alg) { 1267 default: 1268 case AHD_QUEUE_NONE: 1269 now_queuing = 0; 1270 break; 1271 case AHD_QUEUE_BASIC: 1272 now_queuing = AHD_DEV_Q_BASIC; 1273 break; 1274 case AHD_QUEUE_TAGGED: 1275 now_queuing = AHD_DEV_Q_TAGGED; 1276 break; 1277 } 1278 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1279 && (was_queuing != now_queuing) 1280 && (dev->active != 0)) { 1281 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1282 dev->qfrozen++; 1283 } 1284 1285 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1286 if (now_queuing) { 1287 u_int usertags; 1288 1289 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1290 if (!was_queuing) { 1291 /* 1292 * Start out agressively and allow our 1293 * dynamic queue depth algorithm to take 1294 * care of the rest. 1295 */ 1296 dev->maxtags = usertags; 1297 dev->openings = dev->maxtags - dev->active; 1298 } 1299 if (dev->maxtags == 0) { 1300 /* 1301 * Queueing is disabled by the user. 1302 */ 1303 dev->openings = 1; 1304 } else if (alg == AHD_QUEUE_TAGGED) { 1305 dev->flags |= AHD_DEV_Q_TAGGED; 1306 if (aic79xx_periodic_otag != 0) 1307 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1308 } else 1309 dev->flags |= AHD_DEV_Q_BASIC; 1310 } else { 1311 /* We can only have one opening. */ 1312 dev->maxtags = 0; 1313 dev->openings = 1 - dev->active; 1314 } 1315 1316 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1317 case AHD_DEV_Q_BASIC: 1318 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK); 1319 scsi_activate_tcq(sdev, dev->openings + dev->active); 1320 break; 1321 case AHD_DEV_Q_TAGGED: 1322 scsi_set_tag_type(sdev, MSG_ORDERED_TASK); 1323 scsi_activate_tcq(sdev, dev->openings + dev->active); 1324 break; 1325 default: 1326 /* 1327 * We allow the OS to queue 2 untagged transactions to 1328 * us at any time even though we can only execute them 1329 * serially on the controller/device. This should 1330 * remove some latency. 1331 */ 1332 scsi_deactivate_tcq(sdev, 1); 1333 break; 1334 } 1335} 1336 1337int 1338ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1339 int lun, u_int tag, role_t role, uint32_t status) 1340{ 1341 return 0; 1342} 1343 1344static u_int 1345ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1346{ 1347 static int warned_user; 1348 u_int tags; 1349 1350 tags = 0; 1351 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1352 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { 1353 1354 if (warned_user == 0) { 1355 printf(KERN_WARNING 1356"aic79xx: WARNING: Insufficient tag_info instances\n" 1357"aic79xx: for installed controllers. Using defaults\n" 1358"aic79xx: Please update the aic79xx_tag_info array in\n" 1359"aic79xx: the aic79xx_osm.c source file.\n"); 1360 warned_user++; 1361 } 1362 tags = AHD_MAX_QUEUE; 1363 } else { 1364 adapter_tag_info_t *tag_info; 1365 1366 tag_info = &aic79xx_tag_info[ahd->unit]; 1367 tags = tag_info->tag_commands[devinfo->target_offset]; 1368 if (tags > AHD_MAX_QUEUE) 1369 tags = AHD_MAX_QUEUE; 1370 } 1371 } 1372 return (tags); 1373} 1374 1375/* 1376 * Determines the queue depth for a given device. 1377 */ 1378static void 1379ahd_linux_device_queue_depth(struct scsi_device *sdev) 1380{ 1381 struct ahd_devinfo devinfo; 1382 u_int tags; 1383 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1384 1385 ahd_compile_devinfo(&devinfo, 1386 ahd->our_id, 1387 sdev->sdev_target->id, sdev->lun, 1388 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1389 ROLE_INITIATOR); 1390 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1391 if (tags != 0 && sdev->tagged_supported != 0) { 1392 1393 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); 1394 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1395 devinfo.lun, AC_TRANSFER_NEG); 1396 ahd_print_devinfo(ahd, &devinfo); 1397 printf("Tagged Queuing enabled. Depth %d\n", tags); 1398 } else { 1399 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); 1400 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1401 devinfo.lun, AC_TRANSFER_NEG); 1402 } 1403} 1404 1405static int 1406ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1407 struct scsi_cmnd *cmd) 1408{ 1409 struct scb *scb; 1410 struct hardware_scb *hscb; 1411 struct ahd_initiator_tinfo *tinfo; 1412 struct ahd_tmode_tstate *tstate; 1413 u_int col_idx; 1414 uint16_t mask; 1415 unsigned long flags; 1416 1417 ahd_lock(ahd, &flags); 1418 1419 /* 1420 * Get an scb to use. 1421 */ 1422 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1423 cmd->device->id, &tstate); 1424 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1425 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1426 col_idx = AHD_NEVER_COL_IDX; 1427 } else { 1428 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1429 cmd->device->lun); 1430 } 1431 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1432 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1433 ahd_unlock(ahd, &flags); 1434 return SCSI_MLQUEUE_HOST_BUSY; 1435 } 1436 1437 scb->io_ctx = cmd; 1438 scb->platform_data->dev = dev; 1439 hscb = scb->hscb; 1440 cmd->host_scribble = (char *)scb; 1441 1442 /* 1443 * Fill out basics of the HSCB. 1444 */ 1445 hscb->control = 0; 1446 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1447 hscb->lun = cmd->device->lun; 1448 scb->hscb->task_management = 0; 1449 mask = SCB_GET_TARGET_MASK(ahd, scb); 1450 1451 if ((ahd->user_discenable & mask) != 0) 1452 hscb->control |= DISCENB; 1453 1454 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1455 scb->flags |= SCB_PACKETIZED; 1456 1457 if ((tstate->auto_negotiate & mask) != 0) { 1458 scb->flags |= SCB_AUTO_NEGOTIATE; 1459 scb->hscb->control |= MK_MESSAGE; 1460 } 1461 1462 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1463 int msg_bytes; 1464 uint8_t tag_msgs[2]; 1465 1466 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1467 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1468 hscb->control |= tag_msgs[0]; 1469 if (tag_msgs[0] == MSG_ORDERED_TASK) 1470 dev->commands_since_idle_or_otag = 0; 1471 } else 1472 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1473 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1474 hscb->control |= MSG_ORDERED_TASK; 1475 dev->commands_since_idle_or_otag = 0; 1476 } else { 1477 hscb->control |= MSG_SIMPLE_TASK; 1478 } 1479 } 1480 1481 hscb->cdb_len = cmd->cmd_len; 1482 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1483 1484 scb->platform_data->xfer_len = 0; 1485 ahd_set_residual(scb, 0); 1486 ahd_set_sense_residual(scb, 0); 1487 scb->sg_count = 0; 1488 if (cmd->use_sg != 0) { 1489 void *sg; 1490 struct scatterlist *cur_seg; 1491 u_int nseg; 1492 int dir; 1493 1494 cur_seg = (struct scatterlist *)cmd->request_buffer; 1495 dir = cmd->sc_data_direction; 1496 nseg = pci_map_sg(ahd->dev_softc, cur_seg, 1497 cmd->use_sg, dir); 1498 scb->platform_data->xfer_len = 0; 1499 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) { 1500 dma_addr_t addr; 1501 bus_size_t len; 1502 1503 addr = sg_dma_address(cur_seg); 1504 len = sg_dma_len(cur_seg); 1505 scb->platform_data->xfer_len += len; 1506 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1507 /*last*/nseg == 1); 1508 } 1509 } else if (cmd->request_bufflen != 0) { 1510 void *sg; 1511 dma_addr_t addr; 1512 int dir; 1513 1514 sg = scb->sg_list; 1515 dir = cmd->sc_data_direction; 1516 addr = pci_map_single(ahd->dev_softc, 1517 cmd->request_buffer, 1518 cmd->request_bufflen, dir); 1519 scb->platform_data->xfer_len = cmd->request_bufflen; 1520 scb->platform_data->buf_busaddr = addr; 1521 sg = ahd_sg_setup(ahd, scb, sg, addr, 1522 cmd->request_bufflen, /*last*/TRUE); 1523 } 1524 1525 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1526 dev->openings--; 1527 dev->active++; 1528 dev->commands_issued++; 1529 1530 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1531 dev->commands_since_idle_or_otag++; 1532 scb->flags |= SCB_ACTIVE; 1533 ahd_queue_scb(ahd, scb); 1534 1535 ahd_unlock(ahd, &flags); 1536 1537 return 0; 1538} 1539 1540/* 1541 * SCSI controller interrupt handler. 1542 */ 1543irqreturn_t 1544ahd_linux_isr(int irq, void *dev_id) 1545{ 1546 struct ahd_softc *ahd; 1547 u_long flags; 1548 int ours; 1549 1550 ahd = (struct ahd_softc *) dev_id; 1551 ahd_lock(ahd, &flags); 1552 ours = ahd_intr(ahd); 1553 ahd_unlock(ahd, &flags); 1554 return IRQ_RETVAL(ours); 1555} 1556 1557void 1558ahd_send_async(struct ahd_softc *ahd, char channel, 1559 u_int target, u_int lun, ac_code code) 1560{ 1561 switch (code) { 1562 case AC_TRANSFER_NEG: 1563 { 1564 char buf[80]; 1565 struct scsi_target *starget; 1566 struct info_str info; 1567 struct ahd_initiator_tinfo *tinfo; 1568 struct ahd_tmode_tstate *tstate; 1569 unsigned int target_ppr_options; 1570 1571 BUG_ON(target == CAM_TARGET_WILDCARD); 1572 1573 info.buffer = buf; 1574 info.length = sizeof(buf); 1575 info.offset = 0; 1576 info.pos = 0; 1577 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1578 target, &tstate); 1579 1580 /* 1581 * Don't bother reporting results while 1582 * negotiations are still pending. 1583 */ 1584 if (tinfo->curr.period != tinfo->goal.period 1585 || tinfo->curr.width != tinfo->goal.width 1586 || tinfo->curr.offset != tinfo->goal.offset 1587 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1588 if (bootverbose == 0) 1589 break; 1590 1591 /* 1592 * Don't bother reporting results that 1593 * are identical to those last reported. 1594 */ 1595 starget = ahd->platform_data->starget[target]; 1596 if (starget == NULL) 1597 break; 1598 1599 target_ppr_options = 1600 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1601 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1602 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1603 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1604 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1605 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1606 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1607 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1608 1609 if (tinfo->curr.period == spi_period(starget) 1610 && tinfo->curr.width == spi_width(starget) 1611 && tinfo->curr.offset == spi_offset(starget) 1612 && tinfo->curr.ppr_options == target_ppr_options) 1613 if (bootverbose == 0) 1614 break; 1615 1616 spi_period(starget) = tinfo->curr.period; 1617 spi_width(starget) = tinfo->curr.width; 1618 spi_offset(starget) = tinfo->curr.offset; 1619 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1620 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1621 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1622 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1623 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1624 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1625 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1626 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1627 spi_display_xfer_agreement(starget); 1628 break; 1629 } 1630 case AC_SENT_BDR: 1631 { 1632 WARN_ON(lun != CAM_LUN_WILDCARD); 1633 scsi_report_device_reset(ahd->platform_data->host, 1634 channel - 'A', target); 1635 break; 1636 } 1637 case AC_BUS_RESET: 1638 if (ahd->platform_data->host != NULL) { 1639 scsi_report_bus_reset(ahd->platform_data->host, 1640 channel - 'A'); 1641 } 1642 break; 1643 default: 1644 panic("ahd_send_async: Unexpected async event"); 1645 } 1646} 1647 1648/* 1649 * Calls the higher level scsi done function and frees the scb. 1650 */ 1651void 1652ahd_done(struct ahd_softc *ahd, struct scb *scb) 1653{ 1654 struct scsi_cmnd *cmd; 1655 struct ahd_linux_device *dev; 1656 1657 if ((scb->flags & SCB_ACTIVE) == 0) { 1658 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1659 ahd_dump_card_state(ahd); 1660 panic("Stopping for safety"); 1661 } 1662 LIST_REMOVE(scb, pending_links); 1663 cmd = scb->io_ctx; 1664 dev = scb->platform_data->dev; 1665 dev->active--; 1666 dev->openings++; 1667 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1668 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1669 dev->qfrozen--; 1670 } 1671 ahd_linux_unmap_scb(ahd, scb); 1672 1673 /* 1674 * Guard against stale sense data. 1675 * The Linux mid-layer assumes that sense 1676 * was retrieved anytime the first byte of 1677 * the sense buffer looks "sane". 1678 */ 1679 cmd->sense_buffer[0] = 0; 1680 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1681 uint32_t amount_xferred; 1682 1683 amount_xferred = 1684 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1685 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1686#ifdef AHD_DEBUG 1687 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1688 ahd_print_path(ahd, scb); 1689 printf("Set CAM_UNCOR_PARITY\n"); 1690 } 1691#endif 1692 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1693#ifdef AHD_REPORT_UNDERFLOWS 1694 /* 1695 * This code is disabled by default as some 1696 * clients of the SCSI system do not properly 1697 * initialize the underflow parameter. This 1698 * results in spurious termination of commands 1699 * that complete as expected (e.g. underflow is 1700 * allowed as command can return variable amounts 1701 * of data. 1702 */ 1703 } else if (amount_xferred < scb->io_ctx->underflow) { 1704 u_int i; 1705 1706 ahd_print_path(ahd, scb); 1707 printf("CDB:"); 1708 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1709 printf(" 0x%x", scb->io_ctx->cmnd[i]); 1710 printf("\n"); 1711 ahd_print_path(ahd, scb); 1712 printf("Saw underflow (%ld of %ld bytes). " 1713 "Treated as error\n", 1714 ahd_get_residual(scb), 1715 ahd_get_transfer_length(scb)); 1716 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1717#endif 1718 } else { 1719 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1720 } 1721 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1722 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1723 } 1724 1725 if (dev->openings == 1 1726 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1727 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1728 dev->tag_success_count++; 1729 /* 1730 * Some devices deal with temporary internal resource 1731 * shortages by returning queue full. When the queue 1732 * full occurrs, we throttle back. Slowly try to get 1733 * back to our previous queue depth. 1734 */ 1735 if ((dev->openings + dev->active) < dev->maxtags 1736 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1737 dev->tag_success_count = 0; 1738 dev->openings++; 1739 } 1740 1741 if (dev->active == 0) 1742 dev->commands_since_idle_or_otag = 0; 1743 1744 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1745 printf("Recovery SCB completes\n"); 1746 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1747 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1748 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1749 1750 if (ahd->platform_data->eh_done) 1751 complete(ahd->platform_data->eh_done); 1752 } 1753 1754 ahd_free_scb(ahd, scb); 1755 ahd_linux_queue_cmd_complete(ahd, cmd); 1756} 1757 1758static void 1759ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1760 struct scsi_device *sdev, struct scb *scb) 1761{ 1762 struct ahd_devinfo devinfo; 1763 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1764 1765 ahd_compile_devinfo(&devinfo, 1766 ahd->our_id, 1767 sdev->sdev_target->id, sdev->lun, 1768 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1769 ROLE_INITIATOR); 1770 1771 /* 1772 * We don't currently trust the mid-layer to 1773 * properly deal with queue full or busy. So, 1774 * when one occurs, we tell the mid-layer to 1775 * unconditionally requeue the command to us 1776 * so that we can retry it ourselves. We also 1777 * implement our own throttling mechanism so 1778 * we don't clobber the device with too many 1779 * commands. 1780 */ 1781 switch (ahd_get_scsi_status(scb)) { 1782 default: 1783 break; 1784 case SCSI_STATUS_CHECK_COND: 1785 case SCSI_STATUS_CMD_TERMINATED: 1786 { 1787 struct scsi_cmnd *cmd; 1788 1789 /* 1790 * Copy sense information to the OS's cmd 1791 * structure if it is available. 1792 */ 1793 cmd = scb->io_ctx; 1794 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1795 struct scsi_status_iu_header *siu; 1796 u_int sense_size; 1797 u_int sense_offset; 1798 1799 if (scb->flags & SCB_SENSE) { 1800 sense_size = min(sizeof(struct scsi_sense_data) 1801 - ahd_get_sense_residual(scb), 1802 (u_long)sizeof(cmd->sense_buffer)); 1803 sense_offset = 0; 1804 } else { 1805 /* 1806 * Copy only the sense data into the provided 1807 * buffer. 1808 */ 1809 siu = (struct scsi_status_iu_header *) 1810 scb->sense_data; 1811 sense_size = min_t(size_t, 1812 scsi_4btoul(siu->sense_length), 1813 sizeof(cmd->sense_buffer)); 1814 sense_offset = SIU_SENSE_OFFSET(siu); 1815 } 1816 1817 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); 1818 memcpy(cmd->sense_buffer, 1819 ahd_get_sense_buf(ahd, scb) 1820 + sense_offset, sense_size); 1821 cmd->result |= (DRIVER_SENSE << 24); 1822 1823#ifdef AHD_DEBUG 1824 if (ahd_debug & AHD_SHOW_SENSE) { 1825 int i; 1826 1827 printf("Copied %d bytes of sense data at %d:", 1828 sense_size, sense_offset); 1829 for (i = 0; i < sense_size; i++) { 1830 if ((i & 0xF) == 0) 1831 printf("\n"); 1832 printf("0x%x ", cmd->sense_buffer[i]); 1833 } 1834 printf("\n"); 1835 } 1836#endif 1837 } 1838 break; 1839 } 1840 case SCSI_STATUS_QUEUE_FULL: 1841 /* 1842 * By the time the core driver has returned this 1843 * command, all other commands that were queued 1844 * to us but not the device have been returned. 1845 * This ensures that dev->active is equal to 1846 * the number of commands actually queued to 1847 * the device. 1848 */ 1849 dev->tag_success_count = 0; 1850 if (dev->active != 0) { 1851 /* 1852 * Drop our opening count to the number 1853 * of commands currently outstanding. 1854 */ 1855 dev->openings = 0; 1856#ifdef AHD_DEBUG 1857 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1858 ahd_print_path(ahd, scb); 1859 printf("Dropping tag count to %d\n", 1860 dev->active); 1861 } 1862#endif 1863 if (dev->active == dev->tags_on_last_queuefull) { 1864 1865 dev->last_queuefull_same_count++; 1866 /* 1867 * If we repeatedly see a queue full 1868 * at the same queue depth, this 1869 * device has a fixed number of tag 1870 * slots. Lock in this tag depth 1871 * so we stop seeing queue fulls from 1872 * this device. 1873 */ 1874 if (dev->last_queuefull_same_count 1875 == AHD_LOCK_TAGS_COUNT) { 1876 dev->maxtags = dev->active; 1877 ahd_print_path(ahd, scb); 1878 printf("Locking max tag count at %d\n", 1879 dev->active); 1880 } 1881 } else { 1882 dev->tags_on_last_queuefull = dev->active; 1883 dev->last_queuefull_same_count = 0; 1884 } 1885 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 1886 ahd_set_scsi_status(scb, SCSI_STATUS_OK); 1887 ahd_platform_set_tags(ahd, sdev, &devinfo, 1888 (dev->flags & AHD_DEV_Q_BASIC) 1889 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 1890 break; 1891 } 1892 /* 1893 * Drop down to a single opening, and treat this 1894 * as if the target returned BUSY SCSI status. 1895 */ 1896 dev->openings = 1; 1897 ahd_platform_set_tags(ahd, sdev, &devinfo, 1898 (dev->flags & AHD_DEV_Q_BASIC) 1899 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 1900 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); 1901 } 1902} 1903 1904static void 1905ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 1906{ 1907 int status; 1908 int new_status = DID_OK; 1909 int do_fallback = 0; 1910 int scsi_status; 1911 1912 /* 1913 * Map CAM error codes into Linux Error codes. We 1914 * avoid the conversion so that the DV code has the 1915 * full error information available when making 1916 * state change decisions. 1917 */ 1918 1919 status = ahd_cmd_get_transaction_status(cmd); 1920 switch (status) { 1921 case CAM_REQ_INPROG: 1922 case CAM_REQ_CMP: 1923 new_status = DID_OK; 1924 break; 1925 case CAM_AUTOSENSE_FAIL: 1926 new_status = DID_ERROR; 1927 /* Fallthrough */ 1928 case CAM_SCSI_STATUS_ERROR: 1929 scsi_status = ahd_cmd_get_scsi_status(cmd); 1930 1931 switch(scsi_status) { 1932 case SCSI_STATUS_CMD_TERMINATED: 1933 case SCSI_STATUS_CHECK_COND: 1934 if ((cmd->result >> 24) != DRIVER_SENSE) { 1935 do_fallback = 1; 1936 } else { 1937 struct scsi_sense_data *sense; 1938 1939 sense = (struct scsi_sense_data *) 1940 &cmd->sense_buffer; 1941 if (sense->extra_len >= 5 && 1942 (sense->add_sense_code == 0x47 1943 || sense->add_sense_code == 0x48)) 1944 do_fallback = 1; 1945 } 1946 break; 1947 default: 1948 break; 1949 } 1950 break; 1951 case CAM_REQ_ABORTED: 1952 new_status = DID_ABORT; 1953 break; 1954 case CAM_BUSY: 1955 new_status = DID_BUS_BUSY; 1956 break; 1957 case CAM_REQ_INVALID: 1958 case CAM_PATH_INVALID: 1959 new_status = DID_BAD_TARGET; 1960 break; 1961 case CAM_SEL_TIMEOUT: 1962 new_status = DID_NO_CONNECT; 1963 break; 1964 case CAM_SCSI_BUS_RESET: 1965 case CAM_BDR_SENT: 1966 new_status = DID_RESET; 1967 break; 1968 case CAM_UNCOR_PARITY: 1969 new_status = DID_PARITY; 1970 do_fallback = 1; 1971 break; 1972 case CAM_CMD_TIMEOUT: 1973 new_status = DID_TIME_OUT; 1974 do_fallback = 1; 1975 break; 1976 case CAM_REQ_CMP_ERR: 1977 case CAM_UNEXP_BUSFREE: 1978 case CAM_DATA_RUN_ERR: 1979 new_status = DID_ERROR; 1980 do_fallback = 1; 1981 break; 1982 case CAM_UA_ABORT: 1983 case CAM_NO_HBA: 1984 case CAM_SEQUENCE_FAIL: 1985 case CAM_CCB_LEN_ERR: 1986 case CAM_PROVIDE_FAIL: 1987 case CAM_REQ_TERMIO: 1988 case CAM_UNREC_HBA_ERROR: 1989 case CAM_REQ_TOO_BIG: 1990 new_status = DID_ERROR; 1991 break; 1992 case CAM_REQUEUE_REQ: 1993 new_status = DID_REQUEUE; 1994 break; 1995 default: 1996 /* We should never get here */ 1997 new_status = DID_ERROR; 1998 break; 1999 } 2000 2001 if (do_fallback) { 2002 printf("%s: device overrun (status %x) on %d:%d:%d\n", 2003 ahd_name(ahd), status, cmd->device->channel, 2004 cmd->device->id, cmd->device->lun); 2005 } 2006 2007 ahd_cmd_set_transaction_status(cmd, new_status); 2008 2009 cmd->scsi_done(cmd); 2010} 2011 2012static void 2013ahd_freeze_simq(struct ahd_softc *ahd) 2014{ 2015 scsi_block_requests(ahd->platform_data->host); 2016} 2017 2018static void 2019ahd_release_simq(struct ahd_softc *ahd) 2020{ 2021 scsi_unblock_requests(ahd->platform_data->host); 2022} 2023 2024static int 2025ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2026{ 2027 struct ahd_softc *ahd; 2028 struct ahd_linux_device *dev; 2029 struct scb *pending_scb; 2030 u_int saved_scbptr; 2031 u_int active_scbptr; 2032 u_int last_phase; 2033 u_int saved_scsiid; 2034 u_int cdb_byte; 2035 int retval; 2036 int was_paused; 2037 int paused; 2038 int wait; 2039 int disconnected; 2040 ahd_mode_state saved_modes; 2041 unsigned long flags; 2042 2043 pending_scb = NULL; 2044 paused = FALSE; 2045 wait = FALSE; 2046 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2047 2048 scmd_printk(KERN_INFO, cmd, 2049 "Attempting to queue an ABORT message:"); 2050 2051 printf("CDB:"); 2052 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2053 printf(" 0x%x", cmd->cmnd[cdb_byte]); 2054 printf("\n"); 2055 2056 ahd_lock(ahd, &flags); 2057 2058 /* 2059 * First determine if we currently own this command. 2060 * Start by searching the device queue. If not found 2061 * there, check the pending_scb list. If not found 2062 * at all, and the system wanted us to just abort the 2063 * command, return success. 2064 */ 2065 dev = scsi_transport_device_data(cmd->device); 2066 2067 if (dev == NULL) { 2068 /* 2069 * No target device for this command exists, 2070 * so we must not still own the command. 2071 */ 2072 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2073 retval = SUCCESS; 2074 goto no_cmd; 2075 } 2076 2077 /* 2078 * See if we can find a matching cmd in the pending list. 2079 */ 2080 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2081 if (pending_scb->io_ctx == cmd) 2082 break; 2083 } 2084 2085 if (pending_scb == NULL) { 2086 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2087 goto no_cmd; 2088 } 2089 2090 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2091 /* 2092 * We can't queue two recovery actions using the same SCB 2093 */ 2094 retval = FAILED; 2095 goto done; 2096 } 2097 2098 /* 2099 * Ensure that the card doesn't do anything 2100 * behind our back. Also make sure that we 2101 * didn't "just" miss an interrupt that would 2102 * affect this cmd. 2103 */ 2104 was_paused = ahd_is_paused(ahd); 2105 ahd_pause_and_flushwork(ahd); 2106 paused = TRUE; 2107 2108 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2109 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2110 goto no_cmd; 2111 } 2112 2113 printf("%s: At time of recovery, card was %spaused\n", 2114 ahd_name(ahd), was_paused ? "" : "not "); 2115 ahd_dump_card_state(ahd); 2116 2117 disconnected = TRUE; 2118 if (ahd_search_qinfifo(ahd, cmd->device->id, 2119 cmd->device->channel + 'A', 2120 cmd->device->lun, 2121 pending_scb->hscb->tag, 2122 ROLE_INITIATOR, CAM_REQ_ABORTED, 2123 SEARCH_COMPLETE) > 0) { 2124 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2125 ahd_name(ahd), cmd->device->channel, 2126 cmd->device->id, cmd->device->lun); 2127 retval = SUCCESS; 2128 goto done; 2129 } 2130 2131 saved_modes = ahd_save_modes(ahd); 2132 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2133 last_phase = ahd_inb(ahd, LASTPHASE); 2134 saved_scbptr = ahd_get_scbptr(ahd); 2135 active_scbptr = saved_scbptr; 2136 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2137 struct scb *bus_scb; 2138 2139 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2140 if (bus_scb == pending_scb) 2141 disconnected = FALSE; 2142 } 2143 2144 /* 2145 * At this point, pending_scb is the scb associated with the 2146 * passed in command. That command is currently active on the 2147 * bus or is in the disconnected state. 2148 */ 2149 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); 2150 if (last_phase != P_BUSFREE 2151 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2152 2153 /* 2154 * We're active on the bus, so assert ATN 2155 * and hope that the target responds. 2156 */ 2157 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2158 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2159 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2160 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2161 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2162 wait = TRUE; 2163 } else if (disconnected) { 2164 2165 /* 2166 * Actually re-queue this SCB in an attempt 2167 * to select the device before it reconnects. 2168 */ 2169 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2170 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2171 pending_scb->hscb->cdb_len = 0; 2172 pending_scb->hscb->task_attribute = 0; 2173 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2174 2175 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2176 /* 2177 * Mark the SCB has having an outstanding 2178 * task management function. Should the command 2179 * complete normally before the task management 2180 * function can be sent, the host will be notified 2181 * to abort our requeued SCB. 2182 */ 2183 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2184 pending_scb->hscb->task_management); 2185 } else { 2186 /* 2187 * If non-packetized, set the MK_MESSAGE control 2188 * bit indicating that we desire to send a message. 2189 * We also set the disconnected flag since there is 2190 * no guarantee that our SCB control byte matches 2191 * the version on the card. We don't want the 2192 * sequencer to abort the command thinking an 2193 * unsolicited reselection occurred. 2194 */ 2195 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2196 2197 /* 2198 * The sequencer will never re-reference the 2199 * in-core SCB. To make sure we are notified 2200 * during reslection, set the MK_MESSAGE flag in 2201 * the card's copy of the SCB. 2202 */ 2203 ahd_outb(ahd, SCB_CONTROL, 2204 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2205 } 2206 2207 /* 2208 * Clear out any entries in the QINFIFO first 2209 * so we are the next SCB for this target 2210 * to run. 2211 */ 2212 ahd_search_qinfifo(ahd, cmd->device->id, 2213 cmd->device->channel + 'A', cmd->device->lun, 2214 SCB_LIST_NULL, ROLE_INITIATOR, 2215 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2216 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2217 ahd_set_scbptr(ahd, saved_scbptr); 2218 ahd_print_path(ahd, pending_scb); 2219 printf("Device is disconnected, re-queuing SCB\n"); 2220 wait = TRUE; 2221 } else { 2222 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2223 retval = FAILED; 2224 goto done; 2225 } 2226 2227no_cmd: 2228 /* 2229 * Our assumption is that if we don't have the command, no 2230 * recovery action was required, so we return success. Again, 2231 * the semantics of the mid-layer recovery engine are not 2232 * well defined, so this may change in time. 2233 */ 2234 retval = SUCCESS; 2235done: 2236 if (paused) 2237 ahd_unpause(ahd); 2238 if (wait) { 2239 DECLARE_COMPLETION_ONSTACK(done); 2240 2241 ahd->platform_data->eh_done = &done; 2242 ahd_unlock(ahd, &flags); 2243 2244 printf("%s: Recovery code sleeping\n", ahd_name(ahd)); 2245 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2246 ahd_lock(ahd, &flags); 2247 ahd->platform_data->eh_done = NULL; 2248 ahd_unlock(ahd, &flags); 2249 printf("%s: Timer Expired (active %d)\n", 2250 ahd_name(ahd), dev->active); 2251 retval = FAILED; 2252 } 2253 printf("Recovery code awake\n"); 2254 } else 2255 ahd_unlock(ahd, &flags); 2256 2257 if (retval != SUCCESS) 2258 printf("%s: Command abort returning 0x%x\n", 2259 ahd_name(ahd), retval); 2260 2261 return retval; 2262} 2263 2264static void ahd_linux_set_width(struct scsi_target *starget, int width) 2265{ 2266 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2267 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2268 struct ahd_devinfo devinfo; 2269 unsigned long flags; 2270 2271 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2272 starget->channel + 'A', ROLE_INITIATOR); 2273 ahd_lock(ahd, &flags); 2274 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2275 ahd_unlock(ahd, &flags); 2276} 2277 2278static void ahd_linux_set_period(struct scsi_target *starget, int period) 2279{ 2280 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2281 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2282 struct ahd_tmode_tstate *tstate; 2283 struct ahd_initiator_tinfo *tinfo 2284 = ahd_fetch_transinfo(ahd, 2285 starget->channel + 'A', 2286 shost->this_id, starget->id, &tstate); 2287 struct ahd_devinfo devinfo; 2288 unsigned int ppr_options = tinfo->goal.ppr_options; 2289 unsigned int dt; 2290 unsigned long flags; 2291 unsigned long offset = tinfo->goal.offset; 2292 2293#ifdef AHD_DEBUG 2294 if ((ahd_debug & AHD_SHOW_DV) != 0) 2295 printf("%s: set period to %d\n", ahd_name(ahd), period); 2296#endif 2297 if (offset == 0) 2298 offset = MAX_OFFSET; 2299 2300 if (period < 8) 2301 period = 8; 2302 if (period < 10) { 2303 ppr_options |= MSG_EXT_PPR_DT_REQ; 2304 if (period == 8) 2305 ppr_options |= MSG_EXT_PPR_IU_REQ; 2306 } 2307 2308 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2309 2310 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2311 starget->channel + 'A', ROLE_INITIATOR); 2312 2313 /* all PPR requests apart from QAS require wide transfers */ 2314 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2315 if (spi_width(starget) == 0) 2316 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2317 } 2318 2319 ahd_find_syncrate(ahd, &period, &ppr_options, 2320 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2321 2322 ahd_lock(ahd, &flags); 2323 ahd_set_syncrate(ahd, &devinfo, period, offset, 2324 ppr_options, AHD_TRANS_GOAL, FALSE); 2325 ahd_unlock(ahd, &flags); 2326} 2327 2328static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2329{ 2330 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2331 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2332 struct ahd_tmode_tstate *tstate; 2333 struct ahd_initiator_tinfo *tinfo 2334 = ahd_fetch_transinfo(ahd, 2335 starget->channel + 'A', 2336 shost->this_id, starget->id, &tstate); 2337 struct ahd_devinfo devinfo; 2338 unsigned int ppr_options = 0; 2339 unsigned int period = 0; 2340 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2341 unsigned long flags; 2342 2343#ifdef AHD_DEBUG 2344 if ((ahd_debug & AHD_SHOW_DV) != 0) 2345 printf("%s: set offset to %d\n", ahd_name(ahd), offset); 2346#endif 2347 2348 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2349 starget->channel + 'A', ROLE_INITIATOR); 2350 if (offset != 0) { 2351 period = tinfo->goal.period; 2352 ppr_options = tinfo->goal.ppr_options; 2353 ahd_find_syncrate(ahd, &period, &ppr_options, 2354 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2355 } 2356 2357 ahd_lock(ahd, &flags); 2358 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2359 AHD_TRANS_GOAL, FALSE); 2360 ahd_unlock(ahd, &flags); 2361} 2362 2363static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2364{ 2365 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2366 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2367 struct ahd_tmode_tstate *tstate; 2368 struct ahd_initiator_tinfo *tinfo 2369 = ahd_fetch_transinfo(ahd, 2370 starget->channel + 'A', 2371 shost->this_id, starget->id, &tstate); 2372 struct ahd_devinfo devinfo; 2373 unsigned int ppr_options = tinfo->goal.ppr_options 2374 & ~MSG_EXT_PPR_DT_REQ; 2375 unsigned int period = tinfo->goal.period; 2376 unsigned int width = tinfo->goal.width; 2377 unsigned long flags; 2378 2379#ifdef AHD_DEBUG 2380 if ((ahd_debug & AHD_SHOW_DV) != 0) 2381 printf("%s: %s DT\n", ahd_name(ahd), 2382 dt ? "enabling" : "disabling"); 2383#endif 2384 if (dt) { 2385 ppr_options |= MSG_EXT_PPR_DT_REQ; 2386 if (!width) 2387 ahd_linux_set_width(starget, 1); 2388 } else { 2389 if (period <= 9) 2390 period = 10; /* If resetting DT, period must be >= 25ns */ 2391 /* IU is invalid without DT set */ 2392 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2393 } 2394 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2395 starget->channel + 'A', ROLE_INITIATOR); 2396 ahd_find_syncrate(ahd, &period, &ppr_options, 2397 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2398 2399 ahd_lock(ahd, &flags); 2400 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2401 ppr_options, AHD_TRANS_GOAL, FALSE); 2402 ahd_unlock(ahd, &flags); 2403} 2404 2405static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2406{ 2407 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2408 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2409 struct ahd_tmode_tstate *tstate; 2410 struct ahd_initiator_tinfo *tinfo 2411 = ahd_fetch_transinfo(ahd, 2412 starget->channel + 'A', 2413 shost->this_id, starget->id, &tstate); 2414 struct ahd_devinfo devinfo; 2415 unsigned int ppr_options = tinfo->goal.ppr_options 2416 & ~MSG_EXT_PPR_QAS_REQ; 2417 unsigned int period = tinfo->goal.period; 2418 unsigned int dt; 2419 unsigned long flags; 2420 2421#ifdef AHD_DEBUG 2422 if ((ahd_debug & AHD_SHOW_DV) != 0) 2423 printf("%s: %s QAS\n", ahd_name(ahd), 2424 qas ? "enabling" : "disabling"); 2425#endif 2426 2427 if (qas) { 2428 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2429 } 2430 2431 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2432 2433 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2434 starget->channel + 'A', ROLE_INITIATOR); 2435 ahd_find_syncrate(ahd, &period, &ppr_options, 2436 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2437 2438 ahd_lock(ahd, &flags); 2439 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2440 ppr_options, AHD_TRANS_GOAL, FALSE); 2441 ahd_unlock(ahd, &flags); 2442} 2443 2444static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 2445{ 2446 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2447 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2448 struct ahd_tmode_tstate *tstate; 2449 struct ahd_initiator_tinfo *tinfo 2450 = ahd_fetch_transinfo(ahd, 2451 starget->channel + 'A', 2452 shost->this_id, starget->id, &tstate); 2453 struct ahd_devinfo devinfo; 2454 unsigned int ppr_options = tinfo->goal.ppr_options 2455 & ~MSG_EXT_PPR_IU_REQ; 2456 unsigned int period = tinfo->goal.period; 2457 unsigned int dt; 2458 unsigned long flags; 2459 2460#ifdef AHD_DEBUG 2461 if ((ahd_debug & AHD_SHOW_DV) != 0) 2462 printf("%s: %s IU\n", ahd_name(ahd), 2463 iu ? "enabling" : "disabling"); 2464#endif 2465 2466 if (iu) { 2467 ppr_options |= MSG_EXT_PPR_IU_REQ; 2468 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2469 } 2470 2471 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2472 2473 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2474 starget->channel + 'A', ROLE_INITIATOR); 2475 ahd_find_syncrate(ahd, &period, &ppr_options, 2476 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2477 2478 ahd_lock(ahd, &flags); 2479 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2480 ppr_options, AHD_TRANS_GOAL, FALSE); 2481 ahd_unlock(ahd, &flags); 2482} 2483 2484static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2485{ 2486 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2487 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2488 struct ahd_tmode_tstate *tstate; 2489 struct ahd_initiator_tinfo *tinfo 2490 = ahd_fetch_transinfo(ahd, 2491 starget->channel + 'A', 2492 shost->this_id, starget->id, &tstate); 2493 struct ahd_devinfo devinfo; 2494 unsigned int ppr_options = tinfo->goal.ppr_options 2495 & ~MSG_EXT_PPR_RD_STRM; 2496 unsigned int period = tinfo->goal.period; 2497 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2498 unsigned long flags; 2499 2500#ifdef AHD_DEBUG 2501 if ((ahd_debug & AHD_SHOW_DV) != 0) 2502 printf("%s: %s Read Streaming\n", ahd_name(ahd), 2503 rdstrm ? "enabling" : "disabling"); 2504#endif 2505 2506 if (rdstrm) 2507 ppr_options |= MSG_EXT_PPR_RD_STRM; 2508 2509 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2510 starget->channel + 'A', ROLE_INITIATOR); 2511 ahd_find_syncrate(ahd, &period, &ppr_options, 2512 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2513 2514 ahd_lock(ahd, &flags); 2515 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2516 ppr_options, AHD_TRANS_GOAL, FALSE); 2517 ahd_unlock(ahd, &flags); 2518} 2519 2520static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2521{ 2522 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2523 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2524 struct ahd_tmode_tstate *tstate; 2525 struct ahd_initiator_tinfo *tinfo 2526 = ahd_fetch_transinfo(ahd, 2527 starget->channel + 'A', 2528 shost->this_id, starget->id, &tstate); 2529 struct ahd_devinfo devinfo; 2530 unsigned int ppr_options = tinfo->goal.ppr_options 2531 & ~MSG_EXT_PPR_WR_FLOW; 2532 unsigned int period = tinfo->goal.period; 2533 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2534 unsigned long flags; 2535 2536#ifdef AHD_DEBUG 2537 if ((ahd_debug & AHD_SHOW_DV) != 0) 2538 printf("%s: %s Write Flow Control\n", ahd_name(ahd), 2539 wrflow ? "enabling" : "disabling"); 2540#endif 2541 2542 if (wrflow) 2543 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2544 2545 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2546 starget->channel + 'A', ROLE_INITIATOR); 2547 ahd_find_syncrate(ahd, &period, &ppr_options, 2548 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2549 2550 ahd_lock(ahd, &flags); 2551 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2552 ppr_options, AHD_TRANS_GOAL, FALSE); 2553 ahd_unlock(ahd, &flags); 2554} 2555 2556static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2557{ 2558 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2559 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2560 struct ahd_tmode_tstate *tstate; 2561 struct ahd_initiator_tinfo *tinfo 2562 = ahd_fetch_transinfo(ahd, 2563 starget->channel + 'A', 2564 shost->this_id, starget->id, &tstate); 2565 struct ahd_devinfo devinfo; 2566 unsigned int ppr_options = tinfo->goal.ppr_options 2567 & ~MSG_EXT_PPR_RTI; 2568 unsigned int period = tinfo->goal.period; 2569 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2570 unsigned long flags; 2571 2572 if ((ahd->features & AHD_RTI) == 0) { 2573#ifdef AHD_DEBUG 2574 if ((ahd_debug & AHD_SHOW_DV) != 0) 2575 printf("%s: RTI not available\n", ahd_name(ahd)); 2576#endif 2577 return; 2578 } 2579 2580#ifdef AHD_DEBUG 2581 if ((ahd_debug & AHD_SHOW_DV) != 0) 2582 printf("%s: %s RTI\n", ahd_name(ahd), 2583 rti ? "enabling" : "disabling"); 2584#endif 2585 2586 if (rti) 2587 ppr_options |= MSG_EXT_PPR_RTI; 2588 2589 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2590 starget->channel + 'A', ROLE_INITIATOR); 2591 ahd_find_syncrate(ahd, &period, &ppr_options, 2592 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2593 2594 ahd_lock(ahd, &flags); 2595 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2596 ppr_options, AHD_TRANS_GOAL, FALSE); 2597 ahd_unlock(ahd, &flags); 2598} 2599 2600static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2601{ 2602 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2603 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2604 struct ahd_tmode_tstate *tstate; 2605 struct ahd_initiator_tinfo *tinfo 2606 = ahd_fetch_transinfo(ahd, 2607 starget->channel + 'A', 2608 shost->this_id, starget->id, &tstate); 2609 struct ahd_devinfo devinfo; 2610 unsigned int ppr_options = tinfo->goal.ppr_options 2611 & ~MSG_EXT_PPR_PCOMP_EN; 2612 unsigned int period = tinfo->goal.period; 2613 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2614 unsigned long flags; 2615 2616#ifdef AHD_DEBUG 2617 if ((ahd_debug & AHD_SHOW_DV) != 0) 2618 printf("%s: %s Precompensation\n", ahd_name(ahd), 2619 pcomp ? "Enable" : "Disable"); 2620#endif 2621 2622 if (pcomp) { 2623 uint8_t precomp; 2624 2625 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 2626 struct ahd_linux_iocell_opts *iocell_opts; 2627 2628 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2629 precomp = iocell_opts->precomp; 2630 } else { 2631 precomp = AIC79XX_DEFAULT_PRECOMP; 2632 } 2633 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2634 AHD_SET_PRECOMP(ahd, precomp); 2635 } else { 2636 AHD_SET_PRECOMP(ahd, 0); 2637 } 2638 2639 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2640 starget->channel + 'A', ROLE_INITIATOR); 2641 ahd_find_syncrate(ahd, &period, &ppr_options, 2642 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2643 2644 ahd_lock(ahd, &flags); 2645 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2646 ppr_options, AHD_TRANS_GOAL, FALSE); 2647 ahd_unlock(ahd, &flags); 2648} 2649 2650static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2651{ 2652 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2653 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2654 struct ahd_tmode_tstate *tstate; 2655 struct ahd_initiator_tinfo *tinfo 2656 = ahd_fetch_transinfo(ahd, 2657 starget->channel + 'A', 2658 shost->this_id, starget->id, &tstate); 2659 struct ahd_devinfo devinfo; 2660 unsigned int ppr_options = tinfo->goal.ppr_options 2661 & ~MSG_EXT_PPR_HOLD_MCS; 2662 unsigned int period = tinfo->goal.period; 2663 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2664 unsigned long flags; 2665 2666 if (hold) 2667 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2668 2669 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2670 starget->channel + 'A', ROLE_INITIATOR); 2671 ahd_find_syncrate(ahd, &period, &ppr_options, 2672 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2673 2674 ahd_lock(ahd, &flags); 2675 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2676 ppr_options, AHD_TRANS_GOAL, FALSE); 2677 ahd_unlock(ahd, &flags); 2678} 2679 2680static void ahd_linux_get_signalling(struct Scsi_Host *shost) 2681{ 2682 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; 2683 unsigned long flags; 2684 u8 mode; 2685 2686 ahd_lock(ahd, &flags); 2687 ahd_pause(ahd); 2688 mode = ahd_inb(ahd, SBLKCTL); 2689 ahd_unpause(ahd); 2690 ahd_unlock(ahd, &flags); 2691 2692 if (mode & ENAB40) 2693 spi_signalling(shost) = SPI_SIGNAL_LVD; 2694 else if (mode & ENAB20) 2695 spi_signalling(shost) = SPI_SIGNAL_SE; 2696 else 2697 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2698} 2699 2700static struct spi_function_template ahd_linux_transport_functions = { 2701 .set_offset = ahd_linux_set_offset, 2702 .show_offset = 1, 2703 .set_period = ahd_linux_set_period, 2704 .show_period = 1, 2705 .set_width = ahd_linux_set_width, 2706 .show_width = 1, 2707 .set_dt = ahd_linux_set_dt, 2708 .show_dt = 1, 2709 .set_iu = ahd_linux_set_iu, 2710 .show_iu = 1, 2711 .set_qas = ahd_linux_set_qas, 2712 .show_qas = 1, 2713 .set_rd_strm = ahd_linux_set_rd_strm, 2714 .show_rd_strm = 1, 2715 .set_wr_flow = ahd_linux_set_wr_flow, 2716 .show_wr_flow = 1, 2717 .set_rti = ahd_linux_set_rti, 2718 .show_rti = 1, 2719 .set_pcomp_en = ahd_linux_set_pcomp_en, 2720 .show_pcomp_en = 1, 2721 .set_hold_mcs = ahd_linux_set_hold_mcs, 2722 .show_hold_mcs = 1, 2723 .get_signalling = ahd_linux_get_signalling, 2724}; 2725 2726static int __init 2727ahd_linux_init(void) 2728{ 2729 int error = 0; 2730 2731 /* 2732 * If we've been passed any parameters, process them now. 2733 */ 2734 if (aic79xx) 2735 aic79xx_setup(aic79xx); 2736 2737 ahd_linux_transport_template = 2738 spi_attach_transport(&ahd_linux_transport_functions); 2739 if (!ahd_linux_transport_template) 2740 return -ENODEV; 2741 2742 scsi_transport_reserve_device(ahd_linux_transport_template, 2743 sizeof(struct ahd_linux_device)); 2744 2745 error = ahd_linux_pci_init(); 2746 if (error) 2747 spi_release_transport(ahd_linux_transport_template); 2748 return error; 2749} 2750 2751static void __exit 2752ahd_linux_exit(void) 2753{ 2754 ahd_linux_pci_exit(); 2755 spi_release_transport(ahd_linux_transport_template); 2756} 2757 2758module_init(ahd_linux_init); 2759module_exit(ahd_linux_exit); 2760