1/* 2 * Adaptec AIC79xx device driver for Linux. 3 * 4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $ 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#include <linux/slab.h> 57 58/* 59 * Bucket size for counting good commands in between bad ones. 60 */ 61#define AHD_LINUX_ERR_THRESH 1000 62 63/* 64 * Set this to the delay in seconds after SCSI bus reset. 65 * Note, we honor this only for the initial bus reset. 66 * The scsi error recovery code performs its own bus settle 67 * delay handling for error recovery actions. 68 */ 69#ifdef CONFIG_AIC79XX_RESET_DELAY_MS 70#define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS 71#else 72#define AIC79XX_RESET_DELAY 5000 73#endif 74 75/* 76 * To change the default number of tagged transactions allowed per-device, 77 * add a line to the lilo.conf file like: 78 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 79 * which will result in the first four devices on the first two 80 * controllers being set to a tagged queue depth of 32. 81 * 82 * The tag_commands is an array of 16 to allow for wide and twin adapters. 83 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 84 * for channel 1. 85 */ 86typedef struct { 87 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */ 88} adapter_tag_info_t; 89 90/* 91 * Modify this as you see fit for your system. 92 * 93 * 0 tagged queuing disabled 94 * 1 <= n <= 253 n == max tags ever dispatched. 95 * 96 * The driver will throttle the number of commands dispatched to a 97 * device if it returns queue full. For devices with a fixed maximum 98 * queue depth, the driver will eventually determine this depth and 99 * lock it in (a console message is printed to indicate that a lock 100 * has occurred). On some devices, queue full is returned for a temporary 101 * resource shortage. These devices will return queue full at varying 102 * depths. The driver will throttle back when the queue fulls occur and 103 * attempt to slowly increase the depth over time as the device recovers 104 * from the resource shortage. 105 * 106 * In this example, the first line will disable tagged queueing for all 107 * the devices on the first probed aic79xx adapter. 108 * 109 * The second line enables tagged queueing with 4 commands/LUN for IDs 110 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 111 * driver to attempt to use up to 64 tags for ID 1. 112 * 113 * The third line is the same as the first line. 114 * 115 * The fourth line disables tagged queueing for devices 0 and 3. It 116 * enables tagged queueing for the other IDs, with 16 commands/LUN 117 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 118 * IDs 2, 5-7, and 9-15. 119 */ 120 121/* 122 * NOTE: The below structure is for reference only, the actual structure 123 * to modify in order to change things is just below this comment block. 124adapter_tag_info_t aic79xx_tag_info[] = 125{ 126 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 127 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 128 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 129 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 130}; 131*/ 132 133#ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE 134#define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE 135#else 136#define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE 137#endif 138 139#define AIC79XX_CONFIGED_TAG_COMMANDS { \ 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 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \ 148} 149 150/* 151 * By default, use the number of commands specified by 152 * the users kernel configuration. 153 */ 154static adapter_tag_info_t aic79xx_tag_info[] = 155{ 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 {AIC79XX_CONFIGED_TAG_COMMANDS} 172}; 173 174/* 175 * The I/O cell on the chip is very configurable in respect to its analog 176 * characteristics. Set the defaults here; they can be overriden with 177 * the proper insmod parameters. 178 */ 179struct ahd_linux_iocell_opts 180{ 181 uint8_t precomp; 182 uint8_t slewrate; 183 uint8_t amplitude; 184}; 185#define AIC79XX_DEFAULT_PRECOMP 0xFF 186#define AIC79XX_DEFAULT_SLEWRATE 0xFF 187#define AIC79XX_DEFAULT_AMPLITUDE 0xFF 188#define AIC79XX_DEFAULT_IOOPTS \ 189{ \ 190 AIC79XX_DEFAULT_PRECOMP, \ 191 AIC79XX_DEFAULT_SLEWRATE, \ 192 AIC79XX_DEFAULT_AMPLITUDE \ 193} 194#define AIC79XX_PRECOMP_INDEX 0 195#define AIC79XX_SLEWRATE_INDEX 1 196#define AIC79XX_AMPLITUDE_INDEX 2 197static const struct ahd_linux_iocell_opts aic79xx_iocell_info[] = 198{ 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 AIC79XX_DEFAULT_IOOPTS 215}; 216 217/* 218 * There should be a specific return value for this in scsi.h, but 219 * it seems that most drivers ignore it. 220 */ 221#define DID_UNDERFLOW DID_ERROR 222 223void 224ahd_print_path(struct ahd_softc *ahd, struct scb *scb) 225{ 226 printk("(scsi%d:%c:%d:%d): ", 227 ahd->platform_data->host->host_no, 228 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X', 229 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1, 230 scb != NULL ? SCB_GET_LUN(scb) : -1); 231} 232 233 234/* 235 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 236 * has no effect on any later resets that might occur due to things like 237 * SCSI bus timeouts. 238 */ 239static uint32_t aic79xx_no_reset; 240 241/* 242 * Should we force EXTENDED translation on a controller. 243 * 0 == Use whatever is in the SEEPROM or default to off 244 * 1 == Use whatever is in the SEEPROM or default to on 245 */ 246static uint32_t aic79xx_extended; 247 248/* 249 * PCI bus parity checking of the Adaptec controllers. This is somewhat 250 * dubious at best. To my knowledge, this option has never actually 251 * solved a PCI parity problem, but on certain machines with broken PCI 252 * chipset configurations, it can generate tons of false error messages. 253 * It's included in the driver for completeness. 254 * 0 = Shut off PCI parity check 255 * non-0 = Enable PCI parity check 256 * 257 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this 258 * variable to -1 you would actually want to simply pass the variable 259 * name without a number. That will invert the 0 which will result in 260 * -1. 261 */ 262static uint32_t aic79xx_pci_parity = ~0; 263 264/* 265 * There are lots of broken chipsets in the world. Some of them will 266 * violate the PCI spec when we issue byte sized memory writes to our 267 * controller. I/O mapped register access, if allowed by the given 268 * platform, will work in almost all cases. 269 */ 270uint32_t aic79xx_allow_memio = ~0; 271 272/* 273 * So that we can set how long each device is given as a selection timeout. 274 * The table of values goes like this: 275 * 0 - 256ms 276 * 1 - 128ms 277 * 2 - 64ms 278 * 3 - 32ms 279 * We default to 256ms because some older devices need a longer time 280 * to respond to initial selection. 281 */ 282static uint32_t aic79xx_seltime; 283 284/* 285 * Certain devices do not perform any aging on commands. Should the 286 * device be saturated by commands in one portion of the disk, it is 287 * possible for transactions on far away sectors to never be serviced. 288 * To handle these devices, we can periodically send an ordered tag to 289 * force all outstanding transactions to be serviced prior to a new 290 * transaction. 291 */ 292static uint32_t aic79xx_periodic_otag; 293 294/* Some storage boxes are using an LSI chip which has a bug making it 295 * impossible to use aic79xx Rev B chip in 320 speeds. The following 296 * storage boxes have been reported to be buggy: 297 * EonStor 3U 16-Bay: U16U-G3A3 298 * EonStor 2U 12-Bay: U12U-G3A3 299 * SentinelRAID: 2500F R5 / R6 300 * SentinelRAID: 2500F R1 301 * SentinelRAID: 2500F/1500F 302 * SentinelRAID: 150F 303 * 304 * To get around this LSI bug, you can set your board to 160 mode 305 * or you can enable the SLOWCRC bit. 306 */ 307uint32_t aic79xx_slowcrc; 308 309/* 310 * Module information and settable options. 311 */ 312static char *aic79xx = NULL; 313 314MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); 315MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver"); 316MODULE_LICENSE("Dual BSD/GPL"); 317MODULE_VERSION(AIC79XX_DRIVER_VERSION); 318module_param(aic79xx, charp, 0444); 319MODULE_PARM_DESC(aic79xx, 320"period-delimited options string:\n" 321" verbose Enable verbose/diagnostic logging\n" 322" allow_memio Allow device registers to be memory mapped\n" 323" debug Bitmask of debug values to enable\n" 324" no_reset Suppress initial bus resets\n" 325" extended Enable extended geometry on all controllers\n" 326" periodic_otag Send an ordered tagged transaction\n" 327" periodically to prevent tag starvation.\n" 328" This may be required by some older disk\n" 329" or drives/RAID arrays.\n" 330" tag_info:<tag_str> Set per-target tag depth\n" 331" global_tag_depth:<int> Global tag depth for all targets on all buses\n" 332" slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" 333" precomp:<pcomp_list> Set the signal precompensation (0-7).\n" 334" amplitude:<int> Set the signal amplitude (0-7).\n" 335" seltime:<int> Selection Timeout:\n" 336" (0/256ms,1/128ms,2/64ms,3/32ms)\n" 337" slowcrc Turn on the SLOWCRC bit (Rev B only)\n" 338"\n" 339" Sample /etc/modprobe.conf line:\n" 340" Enable verbose logging\n" 341" Set tag depth on Controller 2/Target 2 to 10 tags\n" 342" Shorten the selection timeout to 128ms\n" 343"\n" 344" options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" 345); 346 347static void ahd_linux_handle_scsi_status(struct ahd_softc *, 348 struct scsi_device *, 349 struct scb *); 350static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, 351 struct scsi_cmnd *cmd); 352static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd); 353static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); 354static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, 355 struct ahd_devinfo *devinfo); 356static void ahd_linux_device_queue_depth(struct scsi_device *); 357static int ahd_linux_run_command(struct ahd_softc*, 358 struct ahd_linux_device *, 359 struct scsi_cmnd *); 360static void ahd_linux_setup_tag_info_global(char *p); 361static int aic79xx_setup(char *c); 362static void ahd_freeze_simq(struct ahd_softc *ahd); 363static void ahd_release_simq(struct ahd_softc *ahd); 364 365static int ahd_linux_unit; 366 367 368/************************** OS Utility Wrappers *******************************/ 369void ahd_delay(long); 370void 371ahd_delay(long usec) 372{ 373 /* 374 * udelay on Linux can have problems for 375 * multi-millisecond waits. Wait at most 376 * 1024us per call. 377 */ 378 while (usec > 0) { 379 udelay(usec % 1024); 380 usec -= 1024; 381 } 382} 383 384 385/***************************** Low Level I/O **********************************/ 386uint8_t ahd_inb(struct ahd_softc * ahd, long port); 387void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val); 388void ahd_outw_atomic(struct ahd_softc * ahd, 389 long port, uint16_t val); 390void ahd_outsb(struct ahd_softc * ahd, long port, 391 uint8_t *, int count); 392void ahd_insb(struct ahd_softc * ahd, long port, 393 uint8_t *, int count); 394 395uint8_t 396ahd_inb(struct ahd_softc * ahd, long port) 397{ 398 uint8_t x; 399 400 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 401 x = readb(ahd->bshs[0].maddr + port); 402 } else { 403 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); 404 } 405 mb(); 406 return (x); 407} 408 409 410void 411ahd_outb(struct ahd_softc * ahd, long port, uint8_t val) 412{ 413 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 414 writeb(val, ahd->bshs[0].maddr + port); 415 } else { 416 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); 417 } 418 mb(); 419} 420 421void 422ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val) 423{ 424 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 425 writew(val, ahd->bshs[0].maddr + port); 426 } else { 427 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); 428 } 429 mb(); 430} 431 432void 433ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count) 434{ 435 int i; 436 437 /* 438 * There is probably a more efficient way to do this on Linux 439 * but we don't use this for anything speed critical and this 440 * should work. 441 */ 442 for (i = 0; i < count; i++) 443 ahd_outb(ahd, port, *array++); 444} 445 446void 447ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count) 448{ 449 int i; 450 451 /* 452 * There is probably a more efficient way to do this on Linux 453 * but we don't use this for anything speed critical and this 454 * should work. 455 */ 456 for (i = 0; i < count; i++) 457 *array++ = ahd_inb(ahd, port); 458} 459 460/******************************* PCI Routines *********************************/ 461uint32_t 462ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width) 463{ 464 switch (width) { 465 case 1: 466 { 467 uint8_t retval; 468 469 pci_read_config_byte(pci, reg, &retval); 470 return (retval); 471 } 472 case 2: 473 { 474 uint16_t retval; 475 pci_read_config_word(pci, reg, &retval); 476 return (retval); 477 } 478 case 4: 479 { 480 uint32_t retval; 481 pci_read_config_dword(pci, reg, &retval); 482 return (retval); 483 } 484 default: 485 panic("ahd_pci_read_config: Read size too big"); 486 /* NOTREACHED */ 487 return (0); 488 } 489} 490 491void 492ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width) 493{ 494 switch (width) { 495 case 1: 496 pci_write_config_byte(pci, reg, value); 497 break; 498 case 2: 499 pci_write_config_word(pci, reg, value); 500 break; 501 case 4: 502 pci_write_config_dword(pci, reg, value); 503 break; 504 default: 505 panic("ahd_pci_write_config: Write size too big"); 506 /* NOTREACHED */ 507 } 508} 509 510/****************************** Inlines ***************************************/ 511static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); 512 513static void 514ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) 515{ 516 struct scsi_cmnd *cmd; 517 518 cmd = scb->io_ctx; 519 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); 520 scsi_dma_unmap(cmd); 521} 522 523/******************************** Macros **************************************/ 524#define BUILD_SCSIID(ahd, cmd) \ 525 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id) 526 527/* 528 * Return a string describing the driver. 529 */ 530static const char * 531ahd_linux_info(struct Scsi_Host *host) 532{ 533 static char buffer[512]; 534 char ahd_info[256]; 535 char *bp; 536 struct ahd_softc *ahd; 537 538 bp = &buffer[0]; 539 ahd = *(struct ahd_softc **)host->hostdata; 540 memset(bp, 0, sizeof(buffer)); 541 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n" 542 " <"); 543 strcat(bp, ahd->description); 544 strcat(bp, ">\n" 545 " "); 546 ahd_controller_info(ahd, ahd_info); 547 strcat(bp, ahd_info); 548 549 return (bp); 550} 551 552/* 553 * Queue an SCB to the controller. 554 */ 555static int 556ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 557{ 558 struct ahd_softc *ahd; 559 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device); 560 int rtn = SCSI_MLQUEUE_HOST_BUSY; 561 562 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 563 564 cmd->scsi_done = scsi_done; 565 cmd->result = CAM_REQ_INPROG << 16; 566 rtn = ahd_linux_run_command(ahd, dev, cmd); 567 568 return rtn; 569} 570 571static struct scsi_target ** 572ahd_linux_target_in_softc(struct scsi_target *starget) 573{ 574 struct ahd_softc *ahd = 575 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 576 unsigned int target_offset; 577 578 target_offset = starget->id; 579 if (starget->channel != 0) 580 target_offset += 8; 581 582 return &ahd->platform_data->starget[target_offset]; 583} 584 585static int 586ahd_linux_target_alloc(struct scsi_target *starget) 587{ 588 struct ahd_softc *ahd = 589 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 590 struct seeprom_config *sc = ahd->seep_config; 591 unsigned long flags; 592 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 593 struct ahd_devinfo devinfo; 594 struct ahd_initiator_tinfo *tinfo; 595 struct ahd_tmode_tstate *tstate; 596 char channel = starget->channel + 'A'; 597 598 ahd_lock(ahd, &flags); 599 600 BUG_ON(*ahd_targp != NULL); 601 602 *ahd_targp = starget; 603 604 if (sc) { 605 int flags = sc->device_flags[starget->id]; 606 607 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 608 starget->id, &tstate); 609 610 if ((flags & CFPACKETIZED) == 0) { 611 /* don't negotiate packetized (IU) transfers */ 612 spi_max_iu(starget) = 0; 613 } else { 614 if ((ahd->features & AHD_RTI) == 0) 615 spi_rti(starget) = 0; 616 } 617 618 if ((flags & CFQAS) == 0) 619 spi_max_qas(starget) = 0; 620 621 /* Transinfo values have been set to BIOS settings */ 622 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 623 spi_min_period(starget) = tinfo->user.period; 624 spi_max_offset(starget) = tinfo->user.offset; 625 } 626 627 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 628 starget->id, &tstate); 629 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id, 630 CAM_LUN_WILDCARD, channel, 631 ROLE_INITIATOR); 632 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, 633 AHD_TRANS_GOAL, /*paused*/FALSE); 634 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 635 AHD_TRANS_GOAL, /*paused*/FALSE); 636 ahd_unlock(ahd, &flags); 637 638 return 0; 639} 640 641static void 642ahd_linux_target_destroy(struct scsi_target *starget) 643{ 644 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 645 646 *ahd_targp = NULL; 647} 648 649static int 650ahd_linux_slave_alloc(struct scsi_device *sdev) 651{ 652 struct ahd_softc *ahd = 653 *((struct ahd_softc **)sdev->host->hostdata); 654 struct ahd_linux_device *dev; 655 656 if (bootverbose) 657 printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id); 658 659 dev = scsi_transport_device_data(sdev); 660 memset(dev, 0, sizeof(*dev)); 661 662 /* 663 * We start out life using untagged 664 * transactions of which we allow one. 665 */ 666 dev->openings = 1; 667 668 /* 669 * Set maxtags to 0. This will be changed if we 670 * later determine that we are dealing with 671 * a tagged queuing capable device. 672 */ 673 dev->maxtags = 0; 674 675 return (0); 676} 677 678static int 679ahd_linux_slave_configure(struct scsi_device *sdev) 680{ 681 struct ahd_softc *ahd; 682 683 ahd = *((struct ahd_softc **)sdev->host->hostdata); 684 if (bootverbose) 685 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 686 687 ahd_linux_device_queue_depth(sdev); 688 689 /* Initial Domain Validation */ 690 if (!spi_initial_dv(sdev->sdev_target)) 691 spi_dv_device(sdev); 692 693 return 0; 694} 695 696#if defined(__i386__) 697/* 698 * Return the disk geometry for the given SCSI device. 699 */ 700static int 701ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 702 sector_t capacity, int geom[]) 703{ 704 uint8_t *bh; 705 int heads; 706 int sectors; 707 int cylinders; 708 int ret; 709 int extended; 710 struct ahd_softc *ahd; 711 712 ahd = *((struct ahd_softc **)sdev->host->hostdata); 713 714 bh = scsi_bios_ptable(bdev); 715 if (bh) { 716 ret = scsi_partsize(bh, capacity, 717 &geom[2], &geom[0], &geom[1]); 718 kfree(bh); 719 if (ret != -1) 720 return (ret); 721 } 722 heads = 64; 723 sectors = 32; 724 cylinders = aic_sector_div(capacity, heads, sectors); 725 726 if (aic79xx_extended != 0) 727 extended = 1; 728 else 729 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 730 if (extended && cylinders >= 1024) { 731 heads = 255; 732 sectors = 63; 733 cylinders = aic_sector_div(capacity, heads, sectors); 734 } 735 geom[0] = heads; 736 geom[1] = sectors; 737 geom[2] = cylinders; 738 return (0); 739} 740#endif 741 742/* 743 * Abort the current SCSI command(s). 744 */ 745static int 746ahd_linux_abort(struct scsi_cmnd *cmd) 747{ 748 int error; 749 750 error = ahd_linux_queue_abort_cmd(cmd); 751 752 return error; 753} 754 755/* 756 * Attempt to send a target reset message to the device that timed out. 757 */ 758static int 759ahd_linux_dev_reset(struct scsi_cmnd *cmd) 760{ 761 struct ahd_softc *ahd; 762 struct ahd_linux_device *dev; 763 struct scb *reset_scb; 764 u_int cdb_byte; 765 int retval = SUCCESS; 766 int paused; 767 int wait; 768 struct ahd_initiator_tinfo *tinfo; 769 struct ahd_tmode_tstate *tstate; 770 unsigned long flags; 771 DECLARE_COMPLETION_ONSTACK(done); 772 773 reset_scb = NULL; 774 paused = FALSE; 775 wait = FALSE; 776 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 777 778 scmd_printk(KERN_INFO, cmd, 779 "Attempting to queue a TARGET RESET message:"); 780 781 printk("CDB:"); 782 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 783 printk(" 0x%x", cmd->cmnd[cdb_byte]); 784 printk("\n"); 785 786 /* 787 * Determine if we currently own this command. 788 */ 789 dev = scsi_transport_device_data(cmd->device); 790 791 if (dev == NULL) { 792 /* 793 * No target device for this command exists, 794 * so we must not still own the command. 795 */ 796 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 797 return SUCCESS; 798 } 799 800 /* 801 * Generate us a new SCB 802 */ 803 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); 804 if (!reset_scb) { 805 scmd_printk(KERN_INFO, cmd, "No SCB available\n"); 806 return FAILED; 807 } 808 809 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 810 cmd->device->id, &tstate); 811 reset_scb->io_ctx = cmd; 812 reset_scb->platform_data->dev = dev; 813 reset_scb->sg_count = 0; 814 ahd_set_residual(reset_scb, 0); 815 ahd_set_sense_residual(reset_scb, 0); 816 reset_scb->platform_data->xfer_len = 0; 817 reset_scb->hscb->control = 0; 818 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd); 819 reset_scb->hscb->lun = cmd->device->lun; 820 reset_scb->hscb->cdb_len = 0; 821 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; 822 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; 823 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 824 reset_scb->flags |= SCB_PACKETIZED; 825 } else { 826 reset_scb->hscb->control |= MK_MESSAGE; 827 } 828 dev->openings--; 829 dev->active++; 830 dev->commands_issued++; 831 832 ahd_lock(ahd, &flags); 833 834 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); 835 ahd_queue_scb(ahd, reset_scb); 836 837 ahd->platform_data->eh_done = &done; 838 ahd_unlock(ahd, &flags); 839 840 printk("%s: Device reset code sleeping\n", ahd_name(ahd)); 841 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 842 ahd_lock(ahd, &flags); 843 ahd->platform_data->eh_done = NULL; 844 ahd_unlock(ahd, &flags); 845 printk("%s: Device reset timer expired (active %d)\n", 846 ahd_name(ahd), dev->active); 847 retval = FAILED; 848 } 849 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); 850 851 return (retval); 852} 853 854/* 855 * Reset the SCSI bus. 856 */ 857static int 858ahd_linux_bus_reset(struct scsi_cmnd *cmd) 859{ 860 struct ahd_softc *ahd; 861 int found; 862 unsigned long flags; 863 864 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 865#ifdef AHD_DEBUG 866 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 867 printk("%s: Bus reset called for cmd %p\n", 868 ahd_name(ahd), cmd); 869#endif 870 ahd_lock(ahd, &flags); 871 872 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 873 /*initiate reset*/TRUE); 874 ahd_unlock(ahd, &flags); 875 876 if (bootverbose) 877 printk("%s: SCSI bus reset delivered. " 878 "%d SCBs aborted.\n", ahd_name(ahd), found); 879 880 return (SUCCESS); 881} 882 883struct scsi_host_template aic79xx_driver_template = { 884 .module = THIS_MODULE, 885 .name = "aic79xx", 886 .proc_name = "aic79xx", 887 .proc_info = ahd_linux_proc_info, 888 .info = ahd_linux_info, 889 .queuecommand = ahd_linux_queue, 890 .eh_abort_handler = ahd_linux_abort, 891 .eh_device_reset_handler = ahd_linux_dev_reset, 892 .eh_bus_reset_handler = ahd_linux_bus_reset, 893#if defined(__i386__) 894 .bios_param = ahd_linux_biosparam, 895#endif 896 .can_queue = AHD_MAX_QUEUE, 897 .this_id = -1, 898 .max_sectors = 8192, 899 .cmd_per_lun = 2, 900 .use_clustering = ENABLE_CLUSTERING, 901 .slave_alloc = ahd_linux_slave_alloc, 902 .slave_configure = ahd_linux_slave_configure, 903 .target_alloc = ahd_linux_target_alloc, 904 .target_destroy = ahd_linux_target_destroy, 905}; 906 907/******************************** Bus DMA *************************************/ 908int 909ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 910 bus_size_t alignment, bus_size_t boundary, 911 dma_addr_t lowaddr, dma_addr_t highaddr, 912 bus_dma_filter_t *filter, void *filterarg, 913 bus_size_t maxsize, int nsegments, 914 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 915{ 916 bus_dma_tag_t dmat; 917 918 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 919 if (dmat == NULL) 920 return (ENOMEM); 921 922 /* 923 * Linux is very simplistic about DMA memory. For now don't 924 * maintain all specification information. Once Linux supplies 925 * better facilities for doing these operations, or the 926 * needs of this particular driver change, we might need to do 927 * more here. 928 */ 929 dmat->alignment = alignment; 930 dmat->boundary = boundary; 931 dmat->maxsize = maxsize; 932 *ret_tag = dmat; 933 return (0); 934} 935 936void 937ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 938{ 939 kfree(dmat); 940} 941 942int 943ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 944 int flags, bus_dmamap_t *mapp) 945{ 946 *vaddr = pci_alloc_consistent(ahd->dev_softc, 947 dmat->maxsize, mapp); 948 if (*vaddr == NULL) 949 return (ENOMEM); 950 return(0); 951} 952 953void 954ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 955 void* vaddr, bus_dmamap_t map) 956{ 957 pci_free_consistent(ahd->dev_softc, dmat->maxsize, 958 vaddr, map); 959} 960 961int 962ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 963 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 964 void *cb_arg, int flags) 965{ 966 /* 967 * Assume for now that this will only be used during 968 * initialization and not for per-transaction buffer mapping. 969 */ 970 bus_dma_segment_t stack_sg; 971 972 stack_sg.ds_addr = map; 973 stack_sg.ds_len = dmat->maxsize; 974 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 975 return (0); 976} 977 978void 979ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 980{ 981} 982 983int 984ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 985{ 986 /* Nothing to do */ 987 return (0); 988} 989 990/********************* Platform Dependent Functions ***************************/ 991static void 992ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 993{ 994 995 if ((instance >= 0) 996 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { 997 uint8_t *iocell_info; 998 999 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 1000 iocell_info[index] = value & 0xFFFF; 1001 if (bootverbose) 1002 printk("iocell[%d:%ld] = %d\n", instance, index, value); 1003 } 1004} 1005 1006static void 1007ahd_linux_setup_tag_info_global(char *p) 1008{ 1009 int tags, i, j; 1010 1011 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 1012 printk("Setting Global Tags= %d\n", tags); 1013 1014 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { 1015 for (j = 0; j < AHD_NUM_TARGETS; j++) { 1016 aic79xx_tag_info[i].tag_commands[j] = tags; 1017 } 1018 } 1019} 1020 1021static void 1022ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 1023{ 1024 1025 if ((instance >= 0) && (targ >= 0) 1026 && (instance < ARRAY_SIZE(aic79xx_tag_info)) 1027 && (targ < AHD_NUM_TARGETS)) { 1028 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 1029 if (bootverbose) 1030 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 1031 } 1032} 1033 1034static char * 1035ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 1036 void (*callback)(u_long, int, int, int32_t), 1037 u_long callback_arg) 1038{ 1039 char *tok_end; 1040 char *tok_end2; 1041 int i; 1042 int instance; 1043 int targ; 1044 int done; 1045 char tok_list[] = {'.', ',', '{', '}', '\0'}; 1046 1047 /* All options use a ':' name/arg separator */ 1048 if (*opt_arg != ':') 1049 return (opt_arg); 1050 opt_arg++; 1051 instance = -1; 1052 targ = -1; 1053 done = FALSE; 1054 /* 1055 * Restore separator that may be in 1056 * the middle of our option argument. 1057 */ 1058 tok_end = strchr(opt_arg, '\0'); 1059 if (tok_end < end) 1060 *tok_end = ','; 1061 while (!done) { 1062 switch (*opt_arg) { 1063 case '{': 1064 if (instance == -1) { 1065 instance = 0; 1066 } else { 1067 if (depth > 1) { 1068 if (targ == -1) 1069 targ = 0; 1070 } else { 1071 printk("Malformed Option %s\n", 1072 opt_name); 1073 done = TRUE; 1074 } 1075 } 1076 opt_arg++; 1077 break; 1078 case '}': 1079 if (targ != -1) 1080 targ = -1; 1081 else if (instance != -1) 1082 instance = -1; 1083 opt_arg++; 1084 break; 1085 case ',': 1086 case '.': 1087 if (instance == -1) 1088 done = TRUE; 1089 else if (targ >= 0) 1090 targ++; 1091 else if (instance >= 0) 1092 instance++; 1093 opt_arg++; 1094 break; 1095 case '\0': 1096 done = TRUE; 1097 break; 1098 default: 1099 tok_end = end; 1100 for (i = 0; tok_list[i]; i++) { 1101 tok_end2 = strchr(opt_arg, tok_list[i]); 1102 if ((tok_end2) && (tok_end2 < tok_end)) 1103 tok_end = tok_end2; 1104 } 1105 callback(callback_arg, instance, targ, 1106 simple_strtol(opt_arg, NULL, 0)); 1107 opt_arg = tok_end; 1108 break; 1109 } 1110 } 1111 return (opt_arg); 1112} 1113 1114/* 1115 * Handle Linux boot parameters. This routine allows for assigning a value 1116 * to a parameter with a ':' between the parameter and the value. 1117 * ie. aic79xx=stpwlev:1,extended 1118 */ 1119static int 1120aic79xx_setup(char *s) 1121{ 1122 int i, n; 1123 char *p; 1124 char *end; 1125 1126 static const struct { 1127 const char *name; 1128 uint32_t *flag; 1129 } options[] = { 1130 { "extended", &aic79xx_extended }, 1131 { "no_reset", &aic79xx_no_reset }, 1132 { "verbose", &aic79xx_verbose }, 1133 { "allow_memio", &aic79xx_allow_memio}, 1134#ifdef AHD_DEBUG 1135 { "debug", &ahd_debug }, 1136#endif 1137 { "periodic_otag", &aic79xx_periodic_otag }, 1138 { "pci_parity", &aic79xx_pci_parity }, 1139 { "seltime", &aic79xx_seltime }, 1140 { "tag_info", NULL }, 1141 { "global_tag_depth", NULL}, 1142 { "slewrate", NULL }, 1143 { "precomp", NULL }, 1144 { "amplitude", NULL }, 1145 { "slowcrc", &aic79xx_slowcrc }, 1146 }; 1147 1148 end = strchr(s, '\0'); 1149 1150 n = 0; 1151 1152 while ((p = strsep(&s, ",.")) != NULL) { 1153 if (*p == '\0') 1154 continue; 1155 for (i = 0; i < ARRAY_SIZE(options); i++) { 1156 1157 n = strlen(options[i].name); 1158 if (strncmp(options[i].name, p, n) == 0) 1159 break; 1160 } 1161 if (i == ARRAY_SIZE(options)) 1162 continue; 1163 1164 if (strncmp(p, "global_tag_depth", n) == 0) { 1165 ahd_linux_setup_tag_info_global(p + n); 1166 } else if (strncmp(p, "tag_info", n) == 0) { 1167 s = ahd_parse_brace_option("tag_info", p + n, end, 1168 2, ahd_linux_setup_tag_info, 0); 1169 } else if (strncmp(p, "slewrate", n) == 0) { 1170 s = ahd_parse_brace_option("slewrate", 1171 p + n, end, 1, ahd_linux_setup_iocell_info, 1172 AIC79XX_SLEWRATE_INDEX); 1173 } else if (strncmp(p, "precomp", n) == 0) { 1174 s = ahd_parse_brace_option("precomp", 1175 p + n, end, 1, ahd_linux_setup_iocell_info, 1176 AIC79XX_PRECOMP_INDEX); 1177 } else if (strncmp(p, "amplitude", n) == 0) { 1178 s = ahd_parse_brace_option("amplitude", 1179 p + n, end, 1, ahd_linux_setup_iocell_info, 1180 AIC79XX_AMPLITUDE_INDEX); 1181 } else if (p[n] == ':') { 1182 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1183 } else if (!strncmp(p, "verbose", n)) { 1184 *(options[i].flag) = 1; 1185 } else { 1186 *(options[i].flag) ^= 0xFFFFFFFF; 1187 } 1188 } 1189 return 1; 1190} 1191 1192__setup("aic79xx=", aic79xx_setup); 1193 1194uint32_t aic79xx_verbose; 1195 1196int 1197ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1198{ 1199 char buf[80]; 1200 struct Scsi_Host *host; 1201 char *new_name; 1202 u_long s; 1203 int retval; 1204 1205 template->name = ahd->description; 1206 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1207 if (host == NULL) 1208 return (ENOMEM); 1209 1210 *((struct ahd_softc **)host->hostdata) = ahd; 1211 ahd->platform_data->host = host; 1212 host->can_queue = AHD_MAX_QUEUE; 1213 host->cmd_per_lun = 2; 1214 host->sg_tablesize = AHD_NSEG; 1215 host->this_id = ahd->our_id; 1216 host->irq = ahd->platform_data->irq; 1217 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1218 host->max_lun = AHD_NUM_LUNS; 1219 host->max_channel = 0; 1220 host->sg_tablesize = AHD_NSEG; 1221 ahd_lock(ahd, &s); 1222 ahd_set_unit(ahd, ahd_linux_unit++); 1223 ahd_unlock(ahd, &s); 1224 sprintf(buf, "scsi%d", host->host_no); 1225 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1226 if (new_name != NULL) { 1227 strcpy(new_name, buf); 1228 ahd_set_name(ahd, new_name); 1229 } 1230 host->unique_id = ahd->unit; 1231 ahd_linux_initialize_scsi_bus(ahd); 1232 ahd_intr_enable(ahd, TRUE); 1233 1234 host->transportt = ahd_linux_transport_template; 1235 1236 retval = scsi_add_host(host, &ahd->dev_softc->dev); 1237 if (retval) { 1238 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); 1239 scsi_host_put(host); 1240 return retval; 1241 } 1242 1243 scsi_scan_host(host); 1244 return 0; 1245} 1246 1247/* 1248 * Place the SCSI bus into a known state by either resetting it, 1249 * or forcing transfer negotiations on the next command to any 1250 * target. 1251 */ 1252static void 1253ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1254{ 1255 u_int target_id; 1256 u_int numtarg; 1257 unsigned long s; 1258 1259 target_id = 0; 1260 numtarg = 0; 1261 1262 if (aic79xx_no_reset != 0) 1263 ahd->flags &= ~AHD_RESET_BUS_A; 1264 1265 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1266 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1267 else 1268 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1269 1270 ahd_lock(ahd, &s); 1271 1272 /* 1273 * Force negotiation to async for all targets that 1274 * will not see an initial bus reset. 1275 */ 1276 for (; target_id < numtarg; target_id++) { 1277 struct ahd_devinfo devinfo; 1278 struct ahd_initiator_tinfo *tinfo; 1279 struct ahd_tmode_tstate *tstate; 1280 1281 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1282 target_id, &tstate); 1283 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1284 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1285 ahd_update_neg_request(ahd, &devinfo, tstate, 1286 tinfo, AHD_NEG_ALWAYS); 1287 } 1288 ahd_unlock(ahd, &s); 1289 /* Give the bus some time to recover */ 1290 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1291 ahd_freeze_simq(ahd); 1292 msleep(AIC79XX_RESET_DELAY); 1293 ahd_release_simq(ahd); 1294 } 1295} 1296 1297int 1298ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1299{ 1300 ahd->platform_data = 1301 kmalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC); 1302 if (ahd->platform_data == NULL) 1303 return (ENOMEM); 1304 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data)); 1305 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1306 ahd_lockinit(ahd); 1307 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1308 return (0); 1309} 1310 1311void 1312ahd_platform_free(struct ahd_softc *ahd) 1313{ 1314 struct scsi_target *starget; 1315 int i; 1316 1317 if (ahd->platform_data != NULL) { 1318 /* destroy all of the device and target objects */ 1319 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1320 starget = ahd->platform_data->starget[i]; 1321 if (starget != NULL) { 1322 ahd->platform_data->starget[i] = NULL; 1323 } 1324 } 1325 1326 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1327 free_irq(ahd->platform_data->irq, ahd); 1328 if (ahd->tags[0] == BUS_SPACE_PIO 1329 && ahd->bshs[0].ioport != 0) 1330 release_region(ahd->bshs[0].ioport, 256); 1331 if (ahd->tags[1] == BUS_SPACE_PIO 1332 && ahd->bshs[1].ioport != 0) 1333 release_region(ahd->bshs[1].ioport, 256); 1334 if (ahd->tags[0] == BUS_SPACE_MEMIO 1335 && ahd->bshs[0].maddr != NULL) { 1336 iounmap(ahd->bshs[0].maddr); 1337 release_mem_region(ahd->platform_data->mem_busaddr, 1338 0x1000); 1339 } 1340 if (ahd->platform_data->host) 1341 scsi_host_put(ahd->platform_data->host); 1342 1343 kfree(ahd->platform_data); 1344 } 1345} 1346 1347void 1348ahd_platform_init(struct ahd_softc *ahd) 1349{ 1350 /* 1351 * Lookup and commit any modified IO Cell options. 1352 */ 1353 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 1354 const struct ahd_linux_iocell_opts *iocell_opts; 1355 1356 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1357 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1358 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1359 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1360 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1361 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1362 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1363 } 1364 1365} 1366 1367void 1368ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1369{ 1370 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1371 SCB_GET_CHANNEL(ahd, scb), 1372 SCB_GET_LUN(scb), SCB_LIST_NULL, 1373 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1374} 1375 1376void 1377ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev, 1378 struct ahd_devinfo *devinfo, ahd_queue_alg alg) 1379{ 1380 struct ahd_linux_device *dev; 1381 int was_queuing; 1382 int now_queuing; 1383 1384 if (sdev == NULL) 1385 return; 1386 1387 dev = scsi_transport_device_data(sdev); 1388 1389 if (dev == NULL) 1390 return; 1391 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1392 switch (alg) { 1393 default: 1394 case AHD_QUEUE_NONE: 1395 now_queuing = 0; 1396 break; 1397 case AHD_QUEUE_BASIC: 1398 now_queuing = AHD_DEV_Q_BASIC; 1399 break; 1400 case AHD_QUEUE_TAGGED: 1401 now_queuing = AHD_DEV_Q_TAGGED; 1402 break; 1403 } 1404 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1405 && (was_queuing != now_queuing) 1406 && (dev->active != 0)) { 1407 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1408 dev->qfrozen++; 1409 } 1410 1411 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1412 if (now_queuing) { 1413 u_int usertags; 1414 1415 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1416 if (!was_queuing) { 1417 /* 1418 * Start out agressively and allow our 1419 * dynamic queue depth algorithm to take 1420 * care of the rest. 1421 */ 1422 dev->maxtags = usertags; 1423 dev->openings = dev->maxtags - dev->active; 1424 } 1425 if (dev->maxtags == 0) { 1426 /* 1427 * Queueing is disabled by the user. 1428 */ 1429 dev->openings = 1; 1430 } else if (alg == AHD_QUEUE_TAGGED) { 1431 dev->flags |= AHD_DEV_Q_TAGGED; 1432 if (aic79xx_periodic_otag != 0) 1433 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1434 } else 1435 dev->flags |= AHD_DEV_Q_BASIC; 1436 } else { 1437 /* We can only have one opening. */ 1438 dev->maxtags = 0; 1439 dev->openings = 1 - dev->active; 1440 } 1441 1442 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1443 case AHD_DEV_Q_BASIC: 1444 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK); 1445 scsi_activate_tcq(sdev, dev->openings + dev->active); 1446 break; 1447 case AHD_DEV_Q_TAGGED: 1448 scsi_set_tag_type(sdev, MSG_ORDERED_TASK); 1449 scsi_activate_tcq(sdev, dev->openings + dev->active); 1450 break; 1451 default: 1452 /* 1453 * We allow the OS to queue 2 untagged transactions to 1454 * us at any time even though we can only execute them 1455 * serially on the controller/device. This should 1456 * remove some latency. 1457 */ 1458 scsi_deactivate_tcq(sdev, 1); 1459 break; 1460 } 1461} 1462 1463int 1464ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1465 int lun, u_int tag, role_t role, uint32_t status) 1466{ 1467 return 0; 1468} 1469 1470static u_int 1471ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1472{ 1473 static int warned_user; 1474 u_int tags; 1475 1476 tags = 0; 1477 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1478 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { 1479 1480 if (warned_user == 0) { 1481 printk(KERN_WARNING 1482"aic79xx: WARNING: Insufficient tag_info instances\n" 1483"aic79xx: for installed controllers. Using defaults\n" 1484"aic79xx: Please update the aic79xx_tag_info array in\n" 1485"aic79xx: the aic79xx_osm.c source file.\n"); 1486 warned_user++; 1487 } 1488 tags = AHD_MAX_QUEUE; 1489 } else { 1490 adapter_tag_info_t *tag_info; 1491 1492 tag_info = &aic79xx_tag_info[ahd->unit]; 1493 tags = tag_info->tag_commands[devinfo->target_offset]; 1494 if (tags > AHD_MAX_QUEUE) 1495 tags = AHD_MAX_QUEUE; 1496 } 1497 } 1498 return (tags); 1499} 1500 1501/* 1502 * Determines the queue depth for a given device. 1503 */ 1504static void 1505ahd_linux_device_queue_depth(struct scsi_device *sdev) 1506{ 1507 struct ahd_devinfo devinfo; 1508 u_int tags; 1509 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1510 1511 ahd_compile_devinfo(&devinfo, 1512 ahd->our_id, 1513 sdev->sdev_target->id, sdev->lun, 1514 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1515 ROLE_INITIATOR); 1516 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1517 if (tags != 0 && sdev->tagged_supported != 0) { 1518 1519 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); 1520 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1521 devinfo.lun, AC_TRANSFER_NEG); 1522 ahd_print_devinfo(ahd, &devinfo); 1523 printk("Tagged Queuing enabled. Depth %d\n", tags); 1524 } else { 1525 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); 1526 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1527 devinfo.lun, AC_TRANSFER_NEG); 1528 } 1529} 1530 1531static int 1532ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1533 struct scsi_cmnd *cmd) 1534{ 1535 struct scb *scb; 1536 struct hardware_scb *hscb; 1537 struct ahd_initiator_tinfo *tinfo; 1538 struct ahd_tmode_tstate *tstate; 1539 u_int col_idx; 1540 uint16_t mask; 1541 unsigned long flags; 1542 int nseg; 1543 1544 nseg = scsi_dma_map(cmd); 1545 if (nseg < 0) 1546 return SCSI_MLQUEUE_HOST_BUSY; 1547 1548 ahd_lock(ahd, &flags); 1549 1550 /* 1551 * Get an scb to use. 1552 */ 1553 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1554 cmd->device->id, &tstate); 1555 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1556 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1557 col_idx = AHD_NEVER_COL_IDX; 1558 } else { 1559 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1560 cmd->device->lun); 1561 } 1562 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1563 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1564 ahd_unlock(ahd, &flags); 1565 scsi_dma_unmap(cmd); 1566 return SCSI_MLQUEUE_HOST_BUSY; 1567 } 1568 1569 scb->io_ctx = cmd; 1570 scb->platform_data->dev = dev; 1571 hscb = scb->hscb; 1572 cmd->host_scribble = (char *)scb; 1573 1574 /* 1575 * Fill out basics of the HSCB. 1576 */ 1577 hscb->control = 0; 1578 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1579 hscb->lun = cmd->device->lun; 1580 scb->hscb->task_management = 0; 1581 mask = SCB_GET_TARGET_MASK(ahd, scb); 1582 1583 if ((ahd->user_discenable & mask) != 0) 1584 hscb->control |= DISCENB; 1585 1586 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1587 scb->flags |= SCB_PACKETIZED; 1588 1589 if ((tstate->auto_negotiate & mask) != 0) { 1590 scb->flags |= SCB_AUTO_NEGOTIATE; 1591 scb->hscb->control |= MK_MESSAGE; 1592 } 1593 1594 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1595 int msg_bytes; 1596 uint8_t tag_msgs[2]; 1597 1598 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1599 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1600 hscb->control |= tag_msgs[0]; 1601 if (tag_msgs[0] == MSG_ORDERED_TASK) 1602 dev->commands_since_idle_or_otag = 0; 1603 } else 1604 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1605 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1606 hscb->control |= MSG_ORDERED_TASK; 1607 dev->commands_since_idle_or_otag = 0; 1608 } else { 1609 hscb->control |= MSG_SIMPLE_TASK; 1610 } 1611 } 1612 1613 hscb->cdb_len = cmd->cmd_len; 1614 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1615 1616 scb->platform_data->xfer_len = 0; 1617 ahd_set_residual(scb, 0); 1618 ahd_set_sense_residual(scb, 0); 1619 scb->sg_count = 0; 1620 1621 if (nseg > 0) { 1622 void *sg = scb->sg_list; 1623 struct scatterlist *cur_seg; 1624 int i; 1625 1626 scb->platform_data->xfer_len = 0; 1627 1628 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1629 dma_addr_t addr; 1630 bus_size_t len; 1631 1632 addr = sg_dma_address(cur_seg); 1633 len = sg_dma_len(cur_seg); 1634 scb->platform_data->xfer_len += len; 1635 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1636 i == (nseg - 1)); 1637 } 1638 } 1639 1640 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1641 dev->openings--; 1642 dev->active++; 1643 dev->commands_issued++; 1644 1645 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1646 dev->commands_since_idle_or_otag++; 1647 scb->flags |= SCB_ACTIVE; 1648 ahd_queue_scb(ahd, scb); 1649 1650 ahd_unlock(ahd, &flags); 1651 1652 return 0; 1653} 1654 1655/* 1656 * SCSI controller interrupt handler. 1657 */ 1658irqreturn_t 1659ahd_linux_isr(int irq, void *dev_id) 1660{ 1661 struct ahd_softc *ahd; 1662 u_long flags; 1663 int ours; 1664 1665 ahd = (struct ahd_softc *) dev_id; 1666 ahd_lock(ahd, &flags); 1667 ours = ahd_intr(ahd); 1668 ahd_unlock(ahd, &flags); 1669 return IRQ_RETVAL(ours); 1670} 1671 1672void 1673ahd_send_async(struct ahd_softc *ahd, char channel, 1674 u_int target, u_int lun, ac_code code) 1675{ 1676 switch (code) { 1677 case AC_TRANSFER_NEG: 1678 { 1679 char buf[80]; 1680 struct scsi_target *starget; 1681 struct info_str info; 1682 struct ahd_initiator_tinfo *tinfo; 1683 struct ahd_tmode_tstate *tstate; 1684 unsigned int target_ppr_options; 1685 1686 BUG_ON(target == CAM_TARGET_WILDCARD); 1687 1688 info.buffer = buf; 1689 info.length = sizeof(buf); 1690 info.offset = 0; 1691 info.pos = 0; 1692 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1693 target, &tstate); 1694 1695 /* 1696 * Don't bother reporting results while 1697 * negotiations are still pending. 1698 */ 1699 if (tinfo->curr.period != tinfo->goal.period 1700 || tinfo->curr.width != tinfo->goal.width 1701 || tinfo->curr.offset != tinfo->goal.offset 1702 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1703 if (bootverbose == 0) 1704 break; 1705 1706 /* 1707 * Don't bother reporting results that 1708 * are identical to those last reported. 1709 */ 1710 starget = ahd->platform_data->starget[target]; 1711 if (starget == NULL) 1712 break; 1713 1714 target_ppr_options = 1715 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1716 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1717 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1718 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1719 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1720 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1721 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1722 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1723 1724 if (tinfo->curr.period == spi_period(starget) 1725 && tinfo->curr.width == spi_width(starget) 1726 && tinfo->curr.offset == spi_offset(starget) 1727 && tinfo->curr.ppr_options == target_ppr_options) 1728 if (bootverbose == 0) 1729 break; 1730 1731 spi_period(starget) = tinfo->curr.period; 1732 spi_width(starget) = tinfo->curr.width; 1733 spi_offset(starget) = tinfo->curr.offset; 1734 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1735 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1736 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1737 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1738 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1739 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1740 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1741 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1742 spi_display_xfer_agreement(starget); 1743 break; 1744 } 1745 case AC_SENT_BDR: 1746 { 1747 WARN_ON(lun != CAM_LUN_WILDCARD); 1748 scsi_report_device_reset(ahd->platform_data->host, 1749 channel - 'A', target); 1750 break; 1751 } 1752 case AC_BUS_RESET: 1753 if (ahd->platform_data->host != NULL) { 1754 scsi_report_bus_reset(ahd->platform_data->host, 1755 channel - 'A'); 1756 } 1757 break; 1758 default: 1759 panic("ahd_send_async: Unexpected async event"); 1760 } 1761} 1762 1763/* 1764 * Calls the higher level scsi done function and frees the scb. 1765 */ 1766void 1767ahd_done(struct ahd_softc *ahd, struct scb *scb) 1768{ 1769 struct scsi_cmnd *cmd; 1770 struct ahd_linux_device *dev; 1771 1772 if ((scb->flags & SCB_ACTIVE) == 0) { 1773 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1774 ahd_dump_card_state(ahd); 1775 panic("Stopping for safety"); 1776 } 1777 LIST_REMOVE(scb, pending_links); 1778 cmd = scb->io_ctx; 1779 dev = scb->platform_data->dev; 1780 dev->active--; 1781 dev->openings++; 1782 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1783 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1784 dev->qfrozen--; 1785 } 1786 ahd_linux_unmap_scb(ahd, scb); 1787 1788 /* 1789 * Guard against stale sense data. 1790 * The Linux mid-layer assumes that sense 1791 * was retrieved anytime the first byte of 1792 * the sense buffer looks "sane". 1793 */ 1794 cmd->sense_buffer[0] = 0; 1795 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1796 uint32_t amount_xferred; 1797 1798 amount_xferred = 1799 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1800 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1801#ifdef AHD_DEBUG 1802 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1803 ahd_print_path(ahd, scb); 1804 printk("Set CAM_UNCOR_PARITY\n"); 1805 } 1806#endif 1807 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1808#ifdef AHD_REPORT_UNDERFLOWS 1809 /* 1810 * This code is disabled by default as some 1811 * clients of the SCSI system do not properly 1812 * initialize the underflow parameter. This 1813 * results in spurious termination of commands 1814 * that complete as expected (e.g. underflow is 1815 * allowed as command can return variable amounts 1816 * of data. 1817 */ 1818 } else if (amount_xferred < scb->io_ctx->underflow) { 1819 u_int i; 1820 1821 ahd_print_path(ahd, scb); 1822 printk("CDB:"); 1823 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1824 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1825 printk("\n"); 1826 ahd_print_path(ahd, scb); 1827 printk("Saw underflow (%ld of %ld bytes). " 1828 "Treated as error\n", 1829 ahd_get_residual(scb), 1830 ahd_get_transfer_length(scb)); 1831 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1832#endif 1833 } else { 1834 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1835 } 1836 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1837 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1838 } 1839 1840 if (dev->openings == 1 1841 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1842 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1843 dev->tag_success_count++; 1844 /* 1845 * Some devices deal with temporary internal resource 1846 * shortages by returning queue full. When the queue 1847 * full occurrs, we throttle back. Slowly try to get 1848 * back to our previous queue depth. 1849 */ 1850 if ((dev->openings + dev->active) < dev->maxtags 1851 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1852 dev->tag_success_count = 0; 1853 dev->openings++; 1854 } 1855 1856 if (dev->active == 0) 1857 dev->commands_since_idle_or_otag = 0; 1858 1859 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1860 printk("Recovery SCB completes\n"); 1861 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1862 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1863 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1864 1865 if (ahd->platform_data->eh_done) 1866 complete(ahd->platform_data->eh_done); 1867 } 1868 1869 ahd_free_scb(ahd, scb); 1870 ahd_linux_queue_cmd_complete(ahd, cmd); 1871} 1872 1873static void 1874ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1875 struct scsi_device *sdev, struct scb *scb) 1876{ 1877 struct ahd_devinfo devinfo; 1878 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1879 1880 ahd_compile_devinfo(&devinfo, 1881 ahd->our_id, 1882 sdev->sdev_target->id, sdev->lun, 1883 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1884 ROLE_INITIATOR); 1885 1886 /* 1887 * We don't currently trust the mid-layer to 1888 * properly deal with queue full or busy. So, 1889 * when one occurs, we tell the mid-layer to 1890 * unconditionally requeue the command to us 1891 * so that we can retry it ourselves. We also 1892 * implement our own throttling mechanism so 1893 * we don't clobber the device with too many 1894 * commands. 1895 */ 1896 switch (ahd_get_scsi_status(scb)) { 1897 default: 1898 break; 1899 case SCSI_STATUS_CHECK_COND: 1900 case SCSI_STATUS_CMD_TERMINATED: 1901 { 1902 struct scsi_cmnd *cmd; 1903 1904 /* 1905 * Copy sense information to the OS's cmd 1906 * structure if it is available. 1907 */ 1908 cmd = scb->io_ctx; 1909 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1910 struct scsi_status_iu_header *siu; 1911 u_int sense_size; 1912 u_int sense_offset; 1913 1914 if (scb->flags & SCB_SENSE) { 1915 sense_size = min(sizeof(struct scsi_sense_data) 1916 - ahd_get_sense_residual(scb), 1917 (u_long)SCSI_SENSE_BUFFERSIZE); 1918 sense_offset = 0; 1919 } else { 1920 /* 1921 * Copy only the sense data into the provided 1922 * buffer. 1923 */ 1924 siu = (struct scsi_status_iu_header *) 1925 scb->sense_data; 1926 sense_size = min_t(size_t, 1927 scsi_4btoul(siu->sense_length), 1928 SCSI_SENSE_BUFFERSIZE); 1929 sense_offset = SIU_SENSE_OFFSET(siu); 1930 } 1931 1932 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1933 memcpy(cmd->sense_buffer, 1934 ahd_get_sense_buf(ahd, scb) 1935 + sense_offset, sense_size); 1936 cmd->result |= (DRIVER_SENSE << 24); 1937 1938#ifdef AHD_DEBUG 1939 if (ahd_debug & AHD_SHOW_SENSE) { 1940 int i; 1941 1942 printk("Copied %d bytes of sense data at %d:", 1943 sense_size, sense_offset); 1944 for (i = 0; i < sense_size; i++) { 1945 if ((i & 0xF) == 0) 1946 printk("\n"); 1947 printk("0x%x ", cmd->sense_buffer[i]); 1948 } 1949 printk("\n"); 1950 } 1951#endif 1952 } 1953 break; 1954 } 1955 case SCSI_STATUS_QUEUE_FULL: 1956 /* 1957 * By the time the core driver has returned this 1958 * command, all other commands that were queued 1959 * to us but not the device have been returned. 1960 * This ensures that dev->active is equal to 1961 * the number of commands actually queued to 1962 * the device. 1963 */ 1964 dev->tag_success_count = 0; 1965 if (dev->active != 0) { 1966 /* 1967 * Drop our opening count to the number 1968 * of commands currently outstanding. 1969 */ 1970 dev->openings = 0; 1971#ifdef AHD_DEBUG 1972 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1973 ahd_print_path(ahd, scb); 1974 printk("Dropping tag count to %d\n", 1975 dev->active); 1976 } 1977#endif 1978 if (dev->active == dev->tags_on_last_queuefull) { 1979 1980 dev->last_queuefull_same_count++; 1981 /* 1982 * If we repeatedly see a queue full 1983 * at the same queue depth, this 1984 * device has a fixed number of tag 1985 * slots. Lock in this tag depth 1986 * so we stop seeing queue fulls from 1987 * this device. 1988 */ 1989 if (dev->last_queuefull_same_count 1990 == AHD_LOCK_TAGS_COUNT) { 1991 dev->maxtags = dev->active; 1992 ahd_print_path(ahd, scb); 1993 printk("Locking max tag count at %d\n", 1994 dev->active); 1995 } 1996 } else { 1997 dev->tags_on_last_queuefull = dev->active; 1998 dev->last_queuefull_same_count = 0; 1999 } 2000 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 2001 ahd_set_scsi_status(scb, SCSI_STATUS_OK); 2002 ahd_platform_set_tags(ahd, sdev, &devinfo, 2003 (dev->flags & AHD_DEV_Q_BASIC) 2004 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2005 break; 2006 } 2007 /* 2008 * Drop down to a single opening, and treat this 2009 * as if the target returned BUSY SCSI status. 2010 */ 2011 dev->openings = 1; 2012 ahd_platform_set_tags(ahd, sdev, &devinfo, 2013 (dev->flags & AHD_DEV_Q_BASIC) 2014 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2015 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); 2016 } 2017} 2018 2019static void 2020ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 2021{ 2022 int status; 2023 int new_status = DID_OK; 2024 int do_fallback = 0; 2025 int scsi_status; 2026 2027 /* 2028 * Map CAM error codes into Linux Error codes. We 2029 * avoid the conversion so that the DV code has the 2030 * full error information available when making 2031 * state change decisions. 2032 */ 2033 2034 status = ahd_cmd_get_transaction_status(cmd); 2035 switch (status) { 2036 case CAM_REQ_INPROG: 2037 case CAM_REQ_CMP: 2038 new_status = DID_OK; 2039 break; 2040 case CAM_AUTOSENSE_FAIL: 2041 new_status = DID_ERROR; 2042 /* Fallthrough */ 2043 case CAM_SCSI_STATUS_ERROR: 2044 scsi_status = ahd_cmd_get_scsi_status(cmd); 2045 2046 switch(scsi_status) { 2047 case SCSI_STATUS_CMD_TERMINATED: 2048 case SCSI_STATUS_CHECK_COND: 2049 if ((cmd->result >> 24) != DRIVER_SENSE) { 2050 do_fallback = 1; 2051 } else { 2052 struct scsi_sense_data *sense; 2053 2054 sense = (struct scsi_sense_data *) 2055 cmd->sense_buffer; 2056 if (sense->extra_len >= 5 && 2057 (sense->add_sense_code == 0x47 2058 || sense->add_sense_code == 0x48)) 2059 do_fallback = 1; 2060 } 2061 break; 2062 default: 2063 break; 2064 } 2065 break; 2066 case CAM_REQ_ABORTED: 2067 new_status = DID_ABORT; 2068 break; 2069 case CAM_BUSY: 2070 new_status = DID_BUS_BUSY; 2071 break; 2072 case CAM_REQ_INVALID: 2073 case CAM_PATH_INVALID: 2074 new_status = DID_BAD_TARGET; 2075 break; 2076 case CAM_SEL_TIMEOUT: 2077 new_status = DID_NO_CONNECT; 2078 break; 2079 case CAM_SCSI_BUS_RESET: 2080 case CAM_BDR_SENT: 2081 new_status = DID_RESET; 2082 break; 2083 case CAM_UNCOR_PARITY: 2084 new_status = DID_PARITY; 2085 do_fallback = 1; 2086 break; 2087 case CAM_CMD_TIMEOUT: 2088 new_status = DID_TIME_OUT; 2089 do_fallback = 1; 2090 break; 2091 case CAM_REQ_CMP_ERR: 2092 case CAM_UNEXP_BUSFREE: 2093 case CAM_DATA_RUN_ERR: 2094 new_status = DID_ERROR; 2095 do_fallback = 1; 2096 break; 2097 case CAM_UA_ABORT: 2098 case CAM_NO_HBA: 2099 case CAM_SEQUENCE_FAIL: 2100 case CAM_CCB_LEN_ERR: 2101 case CAM_PROVIDE_FAIL: 2102 case CAM_REQ_TERMIO: 2103 case CAM_UNREC_HBA_ERROR: 2104 case CAM_REQ_TOO_BIG: 2105 new_status = DID_ERROR; 2106 break; 2107 case CAM_REQUEUE_REQ: 2108 new_status = DID_REQUEUE; 2109 break; 2110 default: 2111 /* We should never get here */ 2112 new_status = DID_ERROR; 2113 break; 2114 } 2115 2116 if (do_fallback) { 2117 printk("%s: device overrun (status %x) on %d:%d:%d\n", 2118 ahd_name(ahd), status, cmd->device->channel, 2119 cmd->device->id, cmd->device->lun); 2120 } 2121 2122 ahd_cmd_set_transaction_status(cmd, new_status); 2123 2124 cmd->scsi_done(cmd); 2125} 2126 2127static void 2128ahd_freeze_simq(struct ahd_softc *ahd) 2129{ 2130 scsi_block_requests(ahd->platform_data->host); 2131} 2132 2133static void 2134ahd_release_simq(struct ahd_softc *ahd) 2135{ 2136 scsi_unblock_requests(ahd->platform_data->host); 2137} 2138 2139static int 2140ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2141{ 2142 struct ahd_softc *ahd; 2143 struct ahd_linux_device *dev; 2144 struct scb *pending_scb; 2145 u_int saved_scbptr; 2146 u_int active_scbptr; 2147 u_int last_phase; 2148 u_int saved_scsiid; 2149 u_int cdb_byte; 2150 int retval; 2151 int was_paused; 2152 int paused; 2153 int wait; 2154 int disconnected; 2155 ahd_mode_state saved_modes; 2156 unsigned long flags; 2157 2158 pending_scb = NULL; 2159 paused = FALSE; 2160 wait = FALSE; 2161 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2162 2163 scmd_printk(KERN_INFO, cmd, 2164 "Attempting to queue an ABORT message:"); 2165 2166 printk("CDB:"); 2167 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2168 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2169 printk("\n"); 2170 2171 ahd_lock(ahd, &flags); 2172 2173 /* 2174 * First determine if we currently own this command. 2175 * Start by searching the device queue. If not found 2176 * there, check the pending_scb list. If not found 2177 * at all, and the system wanted us to just abort the 2178 * command, return success. 2179 */ 2180 dev = scsi_transport_device_data(cmd->device); 2181 2182 if (dev == NULL) { 2183 /* 2184 * No target device for this command exists, 2185 * so we must not still own the command. 2186 */ 2187 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2188 retval = SUCCESS; 2189 goto no_cmd; 2190 } 2191 2192 /* 2193 * See if we can find a matching cmd in the pending list. 2194 */ 2195 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2196 if (pending_scb->io_ctx == cmd) 2197 break; 2198 } 2199 2200 if (pending_scb == NULL) { 2201 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2202 goto no_cmd; 2203 } 2204 2205 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2206 /* 2207 * We can't queue two recovery actions using the same SCB 2208 */ 2209 retval = FAILED; 2210 goto done; 2211 } 2212 2213 /* 2214 * Ensure that the card doesn't do anything 2215 * behind our back. Also make sure that we 2216 * didn't "just" miss an interrupt that would 2217 * affect this cmd. 2218 */ 2219 was_paused = ahd_is_paused(ahd); 2220 ahd_pause_and_flushwork(ahd); 2221 paused = TRUE; 2222 2223 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2224 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2225 goto no_cmd; 2226 } 2227 2228 printk("%s: At time of recovery, card was %spaused\n", 2229 ahd_name(ahd), was_paused ? "" : "not "); 2230 ahd_dump_card_state(ahd); 2231 2232 disconnected = TRUE; 2233 if (ahd_search_qinfifo(ahd, cmd->device->id, 2234 cmd->device->channel + 'A', 2235 cmd->device->lun, 2236 pending_scb->hscb->tag, 2237 ROLE_INITIATOR, CAM_REQ_ABORTED, 2238 SEARCH_COMPLETE) > 0) { 2239 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2240 ahd_name(ahd), cmd->device->channel, 2241 cmd->device->id, cmd->device->lun); 2242 retval = SUCCESS; 2243 goto done; 2244 } 2245 2246 saved_modes = ahd_save_modes(ahd); 2247 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2248 last_phase = ahd_inb(ahd, LASTPHASE); 2249 saved_scbptr = ahd_get_scbptr(ahd); 2250 active_scbptr = saved_scbptr; 2251 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2252 struct scb *bus_scb; 2253 2254 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2255 if (bus_scb == pending_scb) 2256 disconnected = FALSE; 2257 } 2258 2259 /* 2260 * At this point, pending_scb is the scb associated with the 2261 * passed in command. That command is currently active on the 2262 * bus or is in the disconnected state. 2263 */ 2264 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); 2265 if (last_phase != P_BUSFREE 2266 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2267 2268 /* 2269 * We're active on the bus, so assert ATN 2270 * and hope that the target responds. 2271 */ 2272 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2273 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2274 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2275 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2276 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2277 wait = TRUE; 2278 } else if (disconnected) { 2279 2280 /* 2281 * Actually re-queue this SCB in an attempt 2282 * to select the device before it reconnects. 2283 */ 2284 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2285 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2286 pending_scb->hscb->cdb_len = 0; 2287 pending_scb->hscb->task_attribute = 0; 2288 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2289 2290 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2291 /* 2292 * Mark the SCB has having an outstanding 2293 * task management function. Should the command 2294 * complete normally before the task management 2295 * function can be sent, the host will be notified 2296 * to abort our requeued SCB. 2297 */ 2298 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2299 pending_scb->hscb->task_management); 2300 } else { 2301 /* 2302 * If non-packetized, set the MK_MESSAGE control 2303 * bit indicating that we desire to send a message. 2304 * We also set the disconnected flag since there is 2305 * no guarantee that our SCB control byte matches 2306 * the version on the card. We don't want the 2307 * sequencer to abort the command thinking an 2308 * unsolicited reselection occurred. 2309 */ 2310 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2311 2312 /* 2313 * The sequencer will never re-reference the 2314 * in-core SCB. To make sure we are notified 2315 * during reselection, set the MK_MESSAGE flag in 2316 * the card's copy of the SCB. 2317 */ 2318 ahd_outb(ahd, SCB_CONTROL, 2319 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2320 } 2321 2322 /* 2323 * Clear out any entries in the QINFIFO first 2324 * so we are the next SCB for this target 2325 * to run. 2326 */ 2327 ahd_search_qinfifo(ahd, cmd->device->id, 2328 cmd->device->channel + 'A', cmd->device->lun, 2329 SCB_LIST_NULL, ROLE_INITIATOR, 2330 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2331 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2332 ahd_set_scbptr(ahd, saved_scbptr); 2333 ahd_print_path(ahd, pending_scb); 2334 printk("Device is disconnected, re-queuing SCB\n"); 2335 wait = TRUE; 2336 } else { 2337 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2338 retval = FAILED; 2339 goto done; 2340 } 2341 2342no_cmd: 2343 /* 2344 * Our assumption is that if we don't have the command, no 2345 * recovery action was required, so we return success. Again, 2346 * the semantics of the mid-layer recovery engine are not 2347 * well defined, so this may change in time. 2348 */ 2349 retval = SUCCESS; 2350done: 2351 if (paused) 2352 ahd_unpause(ahd); 2353 if (wait) { 2354 DECLARE_COMPLETION_ONSTACK(done); 2355 2356 ahd->platform_data->eh_done = &done; 2357 ahd_unlock(ahd, &flags); 2358 2359 printk("%s: Recovery code sleeping\n", ahd_name(ahd)); 2360 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2361 ahd_lock(ahd, &flags); 2362 ahd->platform_data->eh_done = NULL; 2363 ahd_unlock(ahd, &flags); 2364 printk("%s: Timer Expired (active %d)\n", 2365 ahd_name(ahd), dev->active); 2366 retval = FAILED; 2367 } 2368 printk("Recovery code awake\n"); 2369 } else 2370 ahd_unlock(ahd, &flags); 2371 2372 if (retval != SUCCESS) 2373 printk("%s: Command abort returning 0x%x\n", 2374 ahd_name(ahd), retval); 2375 2376 return retval; 2377} 2378 2379static void ahd_linux_set_width(struct scsi_target *starget, int width) 2380{ 2381 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2382 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2383 struct ahd_devinfo devinfo; 2384 unsigned long flags; 2385 2386 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2387 starget->channel + 'A', ROLE_INITIATOR); 2388 ahd_lock(ahd, &flags); 2389 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2390 ahd_unlock(ahd, &flags); 2391} 2392 2393static void ahd_linux_set_period(struct scsi_target *starget, int period) 2394{ 2395 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2396 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2397 struct ahd_tmode_tstate *tstate; 2398 struct ahd_initiator_tinfo *tinfo 2399 = ahd_fetch_transinfo(ahd, 2400 starget->channel + 'A', 2401 shost->this_id, starget->id, &tstate); 2402 struct ahd_devinfo devinfo; 2403 unsigned int ppr_options = tinfo->goal.ppr_options; 2404 unsigned int dt; 2405 unsigned long flags; 2406 unsigned long offset = tinfo->goal.offset; 2407 2408#ifdef AHD_DEBUG 2409 if ((ahd_debug & AHD_SHOW_DV) != 0) 2410 printk("%s: set period to %d\n", ahd_name(ahd), period); 2411#endif 2412 if (offset == 0) 2413 offset = MAX_OFFSET; 2414 2415 if (period < 8) 2416 period = 8; 2417 if (period < 10) { 2418 if (spi_max_width(starget)) { 2419 ppr_options |= MSG_EXT_PPR_DT_REQ; 2420 if (period == 8) 2421 ppr_options |= MSG_EXT_PPR_IU_REQ; 2422 } else 2423 period = 10; 2424 } 2425 2426 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2427 2428 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2429 starget->channel + 'A', ROLE_INITIATOR); 2430 2431 /* all PPR requests apart from QAS require wide transfers */ 2432 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2433 if (spi_width(starget) == 0) 2434 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2435 } 2436 2437 ahd_find_syncrate(ahd, &period, &ppr_options, 2438 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2439 2440 ahd_lock(ahd, &flags); 2441 ahd_set_syncrate(ahd, &devinfo, period, offset, 2442 ppr_options, AHD_TRANS_GOAL, FALSE); 2443 ahd_unlock(ahd, &flags); 2444} 2445 2446static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2447{ 2448 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2449 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2450 struct ahd_tmode_tstate *tstate; 2451 struct ahd_initiator_tinfo *tinfo 2452 = ahd_fetch_transinfo(ahd, 2453 starget->channel + 'A', 2454 shost->this_id, starget->id, &tstate); 2455 struct ahd_devinfo devinfo; 2456 unsigned int ppr_options = 0; 2457 unsigned int period = 0; 2458 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2459 unsigned long flags; 2460 2461#ifdef AHD_DEBUG 2462 if ((ahd_debug & AHD_SHOW_DV) != 0) 2463 printk("%s: set offset to %d\n", ahd_name(ahd), offset); 2464#endif 2465 2466 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2467 starget->channel + 'A', ROLE_INITIATOR); 2468 if (offset != 0) { 2469 period = tinfo->goal.period; 2470 ppr_options = tinfo->goal.ppr_options; 2471 ahd_find_syncrate(ahd, &period, &ppr_options, 2472 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2473 } 2474 2475 ahd_lock(ahd, &flags); 2476 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2477 AHD_TRANS_GOAL, FALSE); 2478 ahd_unlock(ahd, &flags); 2479} 2480 2481static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2482{ 2483 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2484 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2485 struct ahd_tmode_tstate *tstate; 2486 struct ahd_initiator_tinfo *tinfo 2487 = ahd_fetch_transinfo(ahd, 2488 starget->channel + 'A', 2489 shost->this_id, starget->id, &tstate); 2490 struct ahd_devinfo devinfo; 2491 unsigned int ppr_options = tinfo->goal.ppr_options 2492 & ~MSG_EXT_PPR_DT_REQ; 2493 unsigned int period = tinfo->goal.period; 2494 unsigned int width = tinfo->goal.width; 2495 unsigned long flags; 2496 2497#ifdef AHD_DEBUG 2498 if ((ahd_debug & AHD_SHOW_DV) != 0) 2499 printk("%s: %s DT\n", ahd_name(ahd), 2500 dt ? "enabling" : "disabling"); 2501#endif 2502 if (dt && spi_max_width(starget)) { 2503 ppr_options |= MSG_EXT_PPR_DT_REQ; 2504 if (!width) 2505 ahd_linux_set_width(starget, 1); 2506 } else { 2507 if (period <= 9) 2508 period = 10; /* If resetting DT, period must be >= 25ns */ 2509 /* IU is invalid without DT set */ 2510 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2511 } 2512 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2513 starget->channel + 'A', ROLE_INITIATOR); 2514 ahd_find_syncrate(ahd, &period, &ppr_options, 2515 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2516 2517 ahd_lock(ahd, &flags); 2518 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2519 ppr_options, AHD_TRANS_GOAL, FALSE); 2520 ahd_unlock(ahd, &flags); 2521} 2522 2523static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2524{ 2525 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2526 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2527 struct ahd_tmode_tstate *tstate; 2528 struct ahd_initiator_tinfo *tinfo 2529 = ahd_fetch_transinfo(ahd, 2530 starget->channel + 'A', 2531 shost->this_id, starget->id, &tstate); 2532 struct ahd_devinfo devinfo; 2533 unsigned int ppr_options = tinfo->goal.ppr_options 2534 & ~MSG_EXT_PPR_QAS_REQ; 2535 unsigned int period = tinfo->goal.period; 2536 unsigned int dt; 2537 unsigned long flags; 2538 2539#ifdef AHD_DEBUG 2540 if ((ahd_debug & AHD_SHOW_DV) != 0) 2541 printk("%s: %s QAS\n", ahd_name(ahd), 2542 qas ? "enabling" : "disabling"); 2543#endif 2544 2545 if (qas) { 2546 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2547 } 2548 2549 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2550 2551 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2552 starget->channel + 'A', ROLE_INITIATOR); 2553 ahd_find_syncrate(ahd, &period, &ppr_options, 2554 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2555 2556 ahd_lock(ahd, &flags); 2557 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2558 ppr_options, AHD_TRANS_GOAL, FALSE); 2559 ahd_unlock(ahd, &flags); 2560} 2561 2562static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 2563{ 2564 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2565 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2566 struct ahd_tmode_tstate *tstate; 2567 struct ahd_initiator_tinfo *tinfo 2568 = ahd_fetch_transinfo(ahd, 2569 starget->channel + 'A', 2570 shost->this_id, starget->id, &tstate); 2571 struct ahd_devinfo devinfo; 2572 unsigned int ppr_options = tinfo->goal.ppr_options 2573 & ~MSG_EXT_PPR_IU_REQ; 2574 unsigned int period = tinfo->goal.period; 2575 unsigned int dt; 2576 unsigned long flags; 2577 2578#ifdef AHD_DEBUG 2579 if ((ahd_debug & AHD_SHOW_DV) != 0) 2580 printk("%s: %s IU\n", ahd_name(ahd), 2581 iu ? "enabling" : "disabling"); 2582#endif 2583 2584 if (iu && spi_max_width(starget)) { 2585 ppr_options |= MSG_EXT_PPR_IU_REQ; 2586 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2587 } 2588 2589 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2590 2591 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2592 starget->channel + 'A', ROLE_INITIATOR); 2593 ahd_find_syncrate(ahd, &period, &ppr_options, 2594 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2595 2596 ahd_lock(ahd, &flags); 2597 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2598 ppr_options, AHD_TRANS_GOAL, FALSE); 2599 ahd_unlock(ahd, &flags); 2600} 2601 2602static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2603{ 2604 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2605 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2606 struct ahd_tmode_tstate *tstate; 2607 struct ahd_initiator_tinfo *tinfo 2608 = ahd_fetch_transinfo(ahd, 2609 starget->channel + 'A', 2610 shost->this_id, starget->id, &tstate); 2611 struct ahd_devinfo devinfo; 2612 unsigned int ppr_options = tinfo->goal.ppr_options 2613 & ~MSG_EXT_PPR_RD_STRM; 2614 unsigned int period = tinfo->goal.period; 2615 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2616 unsigned long flags; 2617 2618#ifdef AHD_DEBUG 2619 if ((ahd_debug & AHD_SHOW_DV) != 0) 2620 printk("%s: %s Read Streaming\n", ahd_name(ahd), 2621 rdstrm ? "enabling" : "disabling"); 2622#endif 2623 2624 if (rdstrm && spi_max_width(starget)) 2625 ppr_options |= MSG_EXT_PPR_RD_STRM; 2626 2627 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2628 starget->channel + 'A', ROLE_INITIATOR); 2629 ahd_find_syncrate(ahd, &period, &ppr_options, 2630 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2631 2632 ahd_lock(ahd, &flags); 2633 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2634 ppr_options, AHD_TRANS_GOAL, FALSE); 2635 ahd_unlock(ahd, &flags); 2636} 2637 2638static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2639{ 2640 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2641 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2642 struct ahd_tmode_tstate *tstate; 2643 struct ahd_initiator_tinfo *tinfo 2644 = ahd_fetch_transinfo(ahd, 2645 starget->channel + 'A', 2646 shost->this_id, starget->id, &tstate); 2647 struct ahd_devinfo devinfo; 2648 unsigned int ppr_options = tinfo->goal.ppr_options 2649 & ~MSG_EXT_PPR_WR_FLOW; 2650 unsigned int period = tinfo->goal.period; 2651 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2652 unsigned long flags; 2653 2654#ifdef AHD_DEBUG 2655 if ((ahd_debug & AHD_SHOW_DV) != 0) 2656 printk("%s: %s Write Flow Control\n", ahd_name(ahd), 2657 wrflow ? "enabling" : "disabling"); 2658#endif 2659 2660 if (wrflow && spi_max_width(starget)) 2661 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2662 2663 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2664 starget->channel + 'A', ROLE_INITIATOR); 2665 ahd_find_syncrate(ahd, &period, &ppr_options, 2666 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2667 2668 ahd_lock(ahd, &flags); 2669 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2670 ppr_options, AHD_TRANS_GOAL, FALSE); 2671 ahd_unlock(ahd, &flags); 2672} 2673 2674static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2675{ 2676 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2677 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2678 struct ahd_tmode_tstate *tstate; 2679 struct ahd_initiator_tinfo *tinfo 2680 = ahd_fetch_transinfo(ahd, 2681 starget->channel + 'A', 2682 shost->this_id, starget->id, &tstate); 2683 struct ahd_devinfo devinfo; 2684 unsigned int ppr_options = tinfo->goal.ppr_options 2685 & ~MSG_EXT_PPR_RTI; 2686 unsigned int period = tinfo->goal.period; 2687 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2688 unsigned long flags; 2689 2690 if ((ahd->features & AHD_RTI) == 0) { 2691#ifdef AHD_DEBUG 2692 if ((ahd_debug & AHD_SHOW_DV) != 0) 2693 printk("%s: RTI not available\n", ahd_name(ahd)); 2694#endif 2695 return; 2696 } 2697 2698#ifdef AHD_DEBUG 2699 if ((ahd_debug & AHD_SHOW_DV) != 0) 2700 printk("%s: %s RTI\n", ahd_name(ahd), 2701 rti ? "enabling" : "disabling"); 2702#endif 2703 2704 if (rti && spi_max_width(starget)) 2705 ppr_options |= MSG_EXT_PPR_RTI; 2706 2707 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2708 starget->channel + 'A', ROLE_INITIATOR); 2709 ahd_find_syncrate(ahd, &period, &ppr_options, 2710 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2711 2712 ahd_lock(ahd, &flags); 2713 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2714 ppr_options, AHD_TRANS_GOAL, FALSE); 2715 ahd_unlock(ahd, &flags); 2716} 2717 2718static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2719{ 2720 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2721 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2722 struct ahd_tmode_tstate *tstate; 2723 struct ahd_initiator_tinfo *tinfo 2724 = ahd_fetch_transinfo(ahd, 2725 starget->channel + 'A', 2726 shost->this_id, starget->id, &tstate); 2727 struct ahd_devinfo devinfo; 2728 unsigned int ppr_options = tinfo->goal.ppr_options 2729 & ~MSG_EXT_PPR_PCOMP_EN; 2730 unsigned int period = tinfo->goal.period; 2731 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2732 unsigned long flags; 2733 2734#ifdef AHD_DEBUG 2735 if ((ahd_debug & AHD_SHOW_DV) != 0) 2736 printk("%s: %s Precompensation\n", ahd_name(ahd), 2737 pcomp ? "Enable" : "Disable"); 2738#endif 2739 2740 if (pcomp && spi_max_width(starget)) { 2741 uint8_t precomp; 2742 2743 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 2744 const struct ahd_linux_iocell_opts *iocell_opts; 2745 2746 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2747 precomp = iocell_opts->precomp; 2748 } else { 2749 precomp = AIC79XX_DEFAULT_PRECOMP; 2750 } 2751 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2752 AHD_SET_PRECOMP(ahd, precomp); 2753 } else { 2754 AHD_SET_PRECOMP(ahd, 0); 2755 } 2756 2757 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2758 starget->channel + 'A', ROLE_INITIATOR); 2759 ahd_find_syncrate(ahd, &period, &ppr_options, 2760 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2761 2762 ahd_lock(ahd, &flags); 2763 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2764 ppr_options, AHD_TRANS_GOAL, FALSE); 2765 ahd_unlock(ahd, &flags); 2766} 2767 2768static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2769{ 2770 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2771 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2772 struct ahd_tmode_tstate *tstate; 2773 struct ahd_initiator_tinfo *tinfo 2774 = ahd_fetch_transinfo(ahd, 2775 starget->channel + 'A', 2776 shost->this_id, starget->id, &tstate); 2777 struct ahd_devinfo devinfo; 2778 unsigned int ppr_options = tinfo->goal.ppr_options 2779 & ~MSG_EXT_PPR_HOLD_MCS; 2780 unsigned int period = tinfo->goal.period; 2781 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2782 unsigned long flags; 2783 2784 if (hold && spi_max_width(starget)) 2785 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2786 2787 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2788 starget->channel + 'A', ROLE_INITIATOR); 2789 ahd_find_syncrate(ahd, &period, &ppr_options, 2790 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2791 2792 ahd_lock(ahd, &flags); 2793 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2794 ppr_options, AHD_TRANS_GOAL, FALSE); 2795 ahd_unlock(ahd, &flags); 2796} 2797 2798static void ahd_linux_get_signalling(struct Scsi_Host *shost) 2799{ 2800 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; 2801 unsigned long flags; 2802 u8 mode; 2803 2804 ahd_lock(ahd, &flags); 2805 ahd_pause(ahd); 2806 mode = ahd_inb(ahd, SBLKCTL); 2807 ahd_unpause(ahd); 2808 ahd_unlock(ahd, &flags); 2809 2810 if (mode & ENAB40) 2811 spi_signalling(shost) = SPI_SIGNAL_LVD; 2812 else if (mode & ENAB20) 2813 spi_signalling(shost) = SPI_SIGNAL_SE; 2814 else 2815 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2816} 2817 2818static struct spi_function_template ahd_linux_transport_functions = { 2819 .set_offset = ahd_linux_set_offset, 2820 .show_offset = 1, 2821 .set_period = ahd_linux_set_period, 2822 .show_period = 1, 2823 .set_width = ahd_linux_set_width, 2824 .show_width = 1, 2825 .set_dt = ahd_linux_set_dt, 2826 .show_dt = 1, 2827 .set_iu = ahd_linux_set_iu, 2828 .show_iu = 1, 2829 .set_qas = ahd_linux_set_qas, 2830 .show_qas = 1, 2831 .set_rd_strm = ahd_linux_set_rd_strm, 2832 .show_rd_strm = 1, 2833 .set_wr_flow = ahd_linux_set_wr_flow, 2834 .show_wr_flow = 1, 2835 .set_rti = ahd_linux_set_rti, 2836 .show_rti = 1, 2837 .set_pcomp_en = ahd_linux_set_pcomp_en, 2838 .show_pcomp_en = 1, 2839 .set_hold_mcs = ahd_linux_set_hold_mcs, 2840 .show_hold_mcs = 1, 2841 .get_signalling = ahd_linux_get_signalling, 2842}; 2843 2844static int __init 2845ahd_linux_init(void) 2846{ 2847 int error = 0; 2848 2849 /* 2850 * If we've been passed any parameters, process them now. 2851 */ 2852 if (aic79xx) 2853 aic79xx_setup(aic79xx); 2854 2855 ahd_linux_transport_template = 2856 spi_attach_transport(&ahd_linux_transport_functions); 2857 if (!ahd_linux_transport_template) 2858 return -ENODEV; 2859 2860 scsi_transport_reserve_device(ahd_linux_transport_template, 2861 sizeof(struct ahd_linux_device)); 2862 2863 error = ahd_linux_pci_init(); 2864 if (error) 2865 spi_release_transport(ahd_linux_transport_template); 2866 return error; 2867} 2868 2869static void __exit 2870ahd_linux_exit(void) 2871{ 2872 ahd_linux_pci_exit(); 2873 spi_release_transport(ahd_linux_transport_template); 2874} 2875 2876module_init(ahd_linux_init); 2877module_exit(ahd_linux_exit); 2878