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aic79xx_osm.c
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linux-6.19.14/drivers/scsi/aic7xxx/aic79xx_osm.c
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 struct ahd_linux_iocell_opts aic79xx_iocell_info[] __ro_after_init = 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 * XXX - these options apply unilaterally to _all_ adapters 235 * cards in the system. This should be fixed. Exceptions to this 236 * rule are noted in the comments. 237 */ 238 239/* 240 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 241 * has no effect on any later resets that might occur due to things like 242 * SCSI bus timeouts. 243 */ 244static uint32_t aic79xx_no_reset; 245 246/* 247 * Should we force EXTENDED translation on a controller. 248 * 0 == Use whatever is in the SEEPROM or default to off 249 * 1 == Use whatever is in the SEEPROM or default to on 250 */ 251static uint32_t aic79xx_extended; 252 253/* 254 * PCI bus parity checking of the Adaptec controllers. This is somewhat 255 * dubious at best. To my knowledge, this option has never actually 256 * solved a PCI parity problem, but on certain machines with broken PCI 257 * chipset configurations, it can generate tons of false error messages. 258 * It's included in the driver for completeness. 259 * 0 = Shut off PCI parity check 260 * non-0 = Enable PCI parity check 261 * 262 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this 263 * variable to -1 you would actually want to simply pass the variable 264 * name without a number. That will invert the 0 which will result in 265 * -1. 266 */ 267static uint32_t aic79xx_pci_parity = ~0; 268 269/* 270 * There are lots of broken chipsets in the world. Some of them will 271 * violate the PCI spec when we issue byte sized memory writes to our 272 * controller. I/O mapped register access, if allowed by the given 273 * platform, will work in almost all cases. 274 */ 275uint32_t aic79xx_allow_memio = ~0; 276 277/* 278 * So that we can set how long each device is given as a selection timeout. 279 * The table of values goes like this: 280 * 0 - 256ms 281 * 1 - 128ms 282 * 2 - 64ms 283 * 3 - 32ms 284 * We default to 256ms because some older devices need a longer time 285 * to respond to initial selection. 286 */ 287static uint32_t aic79xx_seltime; 288 289/* 290 * Certain devices do not perform any aging on commands. Should the 291 * device be saturated by commands in one portion of the disk, it is 292 * possible for transactions on far away sectors to never be serviced. 293 * To handle these devices, we can periodically send an ordered tag to 294 * force all outstanding transactions to be serviced prior to a new 295 * transaction. 296 */ 297static uint32_t aic79xx_periodic_otag; 298 299/* Some storage boxes are using an LSI chip which has a bug making it 300 * impossible to use aic79xx Rev B chip in 320 speeds. The following 301 * storage boxes have been reported to be buggy: 302 * EonStor 3U 16-Bay: U16U-G3A3 303 * EonStor 2U 12-Bay: U12U-G3A3 304 * SentinelRAID: 2500F R5 / R6 305 * SentinelRAID: 2500F R1 306 * SentinelRAID: 2500F/1500F 307 * SentinelRAID: 150F 308 * 309 * To get around this LSI bug, you can set your board to 160 mode 310 * or you can enable the SLOWCRC bit. 311 */ 312uint32_t aic79xx_slowcrc; 313 314/* 315 * Module information and settable options. 316 */ 317static char *aic79xx = NULL; 318 319MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); 320MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver"); 321MODULE_LICENSE("Dual BSD/GPL"); 322MODULE_VERSION(AIC79XX_DRIVER_VERSION); 323module_param(aic79xx, charp, 0444); 324MODULE_PARM_DESC(aic79xx, 325"period-delimited options string:\n" 326" verbose Enable verbose/diagnostic logging\n" 327" allow_memio Allow device registers to be memory mapped\n" 328" debug Bitmask of debug values to enable\n" 329" no_reset Suppress initial bus resets\n" 330" extended Enable extended geometry on all controllers\n" 331" periodic_otag Send an ordered tagged transaction\n" 332" periodically to prevent tag starvation.\n" 333" This may be required by some older disk\n" 334" or drives/RAID arrays.\n" 335" tag_info:<tag_str> Set per-target tag depth\n" 336" global_tag_depth:<int> Global tag depth for all targets on all buses\n" 337" slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" 338" precomp:<pcomp_list> Set the signal precompensation (0-7).\n" 339" amplitude:<int> Set the signal amplitude (0-7).\n" 340" seltime:<int> Selection Timeout:\n" 341" (0/256ms,1/128ms,2/64ms,3/32ms)\n" 342" slowcrc Turn on the SLOWCRC bit (Rev B only)\n" 343"\n" 344" Sample modprobe configuration file:\n" 345" # Enable verbose logging\n" 346" # Set tag depth on Controller 2/Target 2 to 10 tags\n" 347" # Shorten the selection timeout to 128ms\n" 348"\n" 349" options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" 350); 351 352static void ahd_linux_handle_scsi_status(struct ahd_softc *, 353 struct scsi_device *, 354 struct scb *); 355static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, 356 struct scsi_cmnd *cmd); 357static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd); 358static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); 359static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, 360 struct ahd_devinfo *devinfo); 361static void ahd_linux_device_queue_depth(struct scsi_device *); 362static int ahd_linux_run_command(struct ahd_softc*, 363 struct ahd_linux_device *, 364 struct scsi_cmnd *); 365static void ahd_linux_setup_tag_info_global(char *p); 366static int aic79xx_setup(char *c); 367static void ahd_freeze_simq(struct ahd_softc *ahd); 368static void ahd_release_simq(struct ahd_softc *ahd); 369 370static int ahd_linux_unit; 371 372 373/************************** OS Utility Wrappers *******************************/ 374void ahd_delay(long); 375void 376ahd_delay(long usec) 377{ 378 /* 379 * udelay on Linux can have problems for 380 * multi-millisecond waits. Wait at most 381 * 1024us per call. 382 */ 383 while (usec > 0) { 384 udelay(usec % 1024); 385 usec -= 1024; 386 } 387} 388 389 390/***************************** Low Level I/O **********************************/ 391uint8_t ahd_inb(struct ahd_softc * ahd, long port); 392void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val); 393void ahd_outw_atomic(struct ahd_softc * ahd, 394 long port, uint16_t val); 395void ahd_outsb(struct ahd_softc * ahd, long port, 396 uint8_t *, int count); 397void ahd_insb(struct ahd_softc * ahd, long port, 398 uint8_t *, int count); 399 400uint8_t 401ahd_inb(struct ahd_softc * ahd, long port) 402{ 403 uint8_t x; 404 405 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 406 x = readb(ahd->bshs[0].maddr + port); 407 } else { 408 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); 409 } 410 mb(); 411 return (x); 412} 413 414#if 0 /* unused */ 415static uint16_t 416ahd_inw_atomic(struct ahd_softc * ahd, long port) 417{ 418 uint8_t x; 419 420 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 421 x = readw(ahd->bshs[0].maddr + port); 422 } else { 423 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); 424 } 425 mb(); 426 return (x); 427} 428#endif 429 430void 431ahd_outb(struct ahd_softc * ahd, long port, uint8_t val) 432{ 433 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 434 writeb(val, ahd->bshs[0].maddr + port); 435 } else { 436 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); 437 } 438 mb(); 439} 440 441void 442ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val) 443{ 444 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 445 writew(val, ahd->bshs[0].maddr + port); 446 } else { 447 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); 448 } 449 mb(); 450} 451 452void 453ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count) 454{ 455 int i; 456 457 /* 458 * There is probably a more efficient way to do this on Linux 459 * but we don't use this for anything speed critical and this 460 * should work. 461 */ 462 for (i = 0; i < count; i++) 463 ahd_outb(ahd, port, *array++); 464} 465 466void 467ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count) 468{ 469 int i; 470 471 /* 472 * There is probably a more efficient way to do this on Linux 473 * but we don't use this for anything speed critical and this 474 * should work. 475 */ 476 for (i = 0; i < count; i++) 477 *array++ = ahd_inb(ahd, port); 478} 479 480/******************************* PCI Routines *********************************/ 481uint32_t 482ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width) 483{ 484 switch (width) { 485 case 1: 486 { 487 uint8_t retval; 488 489 pci_read_config_byte(pci, reg, &retval); 490 return (retval); 491 } 492 case 2: 493 { 494 uint16_t retval; 495 pci_read_config_word(pci, reg, &retval); 496 return (retval); 497 } 498 case 4: 499 { 500 uint32_t retval; 501 pci_read_config_dword(pci, reg, &retval); 502 return (retval); 503 } 504 default: 505 panic("ahd_pci_read_config: Read size too big"); 506 /* NOTREACHED */ 507 return (0); 508 } 509} 510 511void 512ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width) 513{ 514 switch (width) { 515 case 1: 516 pci_write_config_byte(pci, reg, value); 517 break; 518 case 2: 519 pci_write_config_word(pci, reg, value); 520 break; 521 case 4: 522 pci_write_config_dword(pci, reg, value); 523 break; 524 default: 525 panic("ahd_pci_write_config: Write size too big"); 526 /* NOTREACHED */ 527 } 528} 529 530/****************************** Inlines ***************************************/ 531static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); 532 533static void 534ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) 535{ 536 struct scsi_cmnd *cmd; 537 538 cmd = scb->io_ctx; 539 if (cmd) { 540 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); 541 scsi_dma_unmap(cmd); 542 } 543} 544 545/******************************** Macros **************************************/ 546static inline unsigned int ahd_build_scsiid(struct ahd_softc *ahd, 547 struct scsi_device *sdev) 548{ 549 return ((sdev_id(sdev) << TID_SHIFT) & TID) | (ahd)->our_id; 550} 551 552/* 553 * Return a string describing the driver. 554 */ 555static const char * 556ahd_linux_info(struct Scsi_Host *host) 557{ 558 static char buffer[512]; 559 char ahd_info[256]; 560 char *bp; 561 struct ahd_softc *ahd; 562 563 bp = &buffer[0]; 564 ahd = *(struct ahd_softc **)host->hostdata; 565 memset(bp, 0, sizeof(buffer)); 566 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n" 567 " <"); 568 strcat(bp, ahd->description); 569 strcat(bp, ">\n" 570 " "); 571 ahd_controller_info(ahd, ahd_info); 572 strcat(bp, ahd_info); 573 574 return (bp); 575} 576 577/* 578 * Queue an SCB to the controller. 579 */ 580static int ahd_linux_queue_lck(struct scsi_cmnd *cmd) 581{ 582 struct ahd_softc *ahd; 583 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device); 584 int rtn = SCSI_MLQUEUE_HOST_BUSY; 585 586 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 587 588 cmd->result = CAM_REQ_INPROG << 16; 589 rtn = ahd_linux_run_command(ahd, dev, cmd); 590 591 return rtn; 592} 593 594static DEF_SCSI_QCMD(ahd_linux_queue) 595 596static struct scsi_target ** 597ahd_linux_target_in_softc(struct scsi_target *starget) 598{ 599 struct ahd_softc *ahd = 600 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 601 unsigned int target_offset; 602 603 target_offset = starget->id; 604 if (starget->channel != 0) 605 target_offset += 8; 606 607 return &ahd->platform_data->starget[target_offset]; 608} 609 610static int 611ahd_linux_target_alloc(struct scsi_target *starget) 612{ 613 struct ahd_softc *ahd = 614 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 615 struct seeprom_config *sc = ahd->seep_config; 616 unsigned long flags; 617 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 618 struct ahd_devinfo devinfo; 619 struct ahd_initiator_tinfo *tinfo; 620 struct ahd_tmode_tstate *tstate; 621 char channel = starget->channel + 'A'; 622 623 ahd_lock(ahd, &flags); 624 625 BUG_ON(*ahd_targp != NULL); 626 627 *ahd_targp = starget; 628 629 if (sc) { 630 int flags = sc->device_flags[starget->id]; 631 632 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 633 starget->id, &tstate); 634 635 if ((flags & CFPACKETIZED) == 0) { 636 /* don't negotiate packetized (IU) transfers */ 637 spi_max_iu(starget) = 0; 638 } else { 639 if ((ahd->features & AHD_RTI) == 0) 640 spi_rti(starget) = 0; 641 } 642 643 if ((flags & CFQAS) == 0) 644 spi_max_qas(starget) = 0; 645 646 /* Transinfo values have been set to BIOS settings */ 647 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 648 spi_min_period(starget) = tinfo->user.period; 649 spi_max_offset(starget) = tinfo->user.offset; 650 } 651 652 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 653 starget->id, &tstate); 654 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id, 655 CAM_LUN_WILDCARD, channel, 656 ROLE_INITIATOR); 657 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, 658 AHD_TRANS_GOAL, /*paused*/FALSE); 659 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 660 AHD_TRANS_GOAL, /*paused*/FALSE); 661 ahd_unlock(ahd, &flags); 662 663 return 0; 664} 665 666static void 667ahd_linux_target_destroy(struct scsi_target *starget) 668{ 669 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 670 671 *ahd_targp = NULL; 672} 673 674static int 675ahd_linux_sdev_init(struct scsi_device *sdev) 676{ 677 struct ahd_softc *ahd = 678 *((struct ahd_softc **)sdev->host->hostdata); 679 struct ahd_linux_device *dev; 680 681 if (bootverbose) 682 printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id); 683 684 dev = scsi_transport_device_data(sdev); 685 memset(dev, 0, sizeof(*dev)); 686 687 /* 688 * We start out life using untagged 689 * transactions of which we allow one. 690 */ 691 dev->openings = 1; 692 693 /* 694 * Set maxtags to 0. This will be changed if we 695 * later determine that we are dealing with 696 * a tagged queuing capable device. 697 */ 698 dev->maxtags = 0; 699 700 return (0); 701} 702 703static int 704ahd_linux_sdev_configure(struct scsi_device *sdev, struct queue_limits *lim) 705{ 706 if (bootverbose) 707 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 708 709 ahd_linux_device_queue_depth(sdev); 710 711 /* Initial Domain Validation */ 712 if (!spi_initial_dv(sdev->sdev_target)) 713 spi_dv_device(sdev); 714 715 return 0; 716} 717 718#if defined(__i386__) 719/* 720 * Return the disk geometry for the given SCSI device. 721 */ 722static int 723ahd_linux_biosparam(struct scsi_device *sdev, struct gendisk *disk, 724 sector_t capacity, int geom[]) 725{ 726 int heads; 727 int sectors; 728 int cylinders; 729 int extended; 730 struct ahd_softc *ahd; 731 732 ahd = *((struct ahd_softc **)sdev->host->hostdata); 733 734 if (scsi_partsize(disk, capacity, geom)) 735 return 0; 736 737 heads = 64; 738 sectors = 32; 739 cylinders = aic_sector_div(capacity, heads, sectors); 740 741 if (aic79xx_extended != 0) 742 extended = 1; 743 else 744 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 745 if (extended && cylinders >= 1024) { 746 heads = 255; 747 sectors = 63; 748 cylinders = aic_sector_div(capacity, heads, sectors); 749 } 750 geom[0] = heads; 751 geom[1] = sectors; 752 geom[2] = cylinders; 753 return (0); 754} 755#endif 756 757/* 758 * Abort the current SCSI command(s). 759 */ 760static int 761ahd_linux_abort(struct scsi_cmnd *cmd) 762{ 763 return ahd_linux_queue_abort_cmd(cmd); 764} 765 766/* 767 * Attempt to send a target reset message to the device that timed out. 768 */ 769static int 770ahd_linux_dev_reset(struct scsi_cmnd *cmd) 771{ 772 struct ahd_softc *ahd; 773 struct ahd_linux_device *dev; 774 struct scb *reset_scb; 775 u_int cdb_byte; 776 int retval = SUCCESS; 777 struct ahd_initiator_tinfo *tinfo; 778 struct ahd_tmode_tstate *tstate; 779 unsigned long flags; 780 DECLARE_COMPLETION_ONSTACK(done); 781 782 reset_scb = NULL; 783 784 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 785 786 scmd_printk(KERN_INFO, cmd, 787 "Attempting to queue a TARGET RESET message:"); 788 789 printk("CDB:"); 790 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 791 printk(" 0x%x", cmd->cmnd[cdb_byte]); 792 printk("\n"); 793 794 /* 795 * Determine if we currently own this command. 796 */ 797 dev = scsi_transport_device_data(cmd->device); 798 799 if (dev == NULL) { 800 /* 801 * No target device for this command exists, 802 * so we must not still own the command. 803 */ 804 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 805 return SUCCESS; 806 } 807 808 /* 809 * Generate us a new SCB 810 */ 811 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); 812 if (!reset_scb) { 813 scmd_printk(KERN_INFO, cmd, "No SCB available\n"); 814 return FAILED; 815 } 816 817 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 818 cmd->device->id, &tstate); 819 reset_scb->io_ctx = NULL; 820 reset_scb->platform_data->dev = dev; 821 reset_scb->sg_count = 0; 822 ahd_set_residual(reset_scb, 0); 823 ahd_set_sense_residual(reset_scb, 0); 824 reset_scb->platform_data->xfer_len = 0; 825 reset_scb->hscb->control = 0; 826 reset_scb->hscb->scsiid = ahd_build_scsiid(ahd, cmd->device); 827 reset_scb->hscb->lun = cmd->device->lun; 828 reset_scb->hscb->cdb_len = 0; 829 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; 830 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; 831 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 832 reset_scb->flags |= SCB_PACKETIZED; 833 } else { 834 reset_scb->hscb->control |= MK_MESSAGE; 835 } 836 dev->openings--; 837 dev->active++; 838 dev->commands_issued++; 839 840 ahd_lock(ahd, &flags); 841 842 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); 843 ahd_queue_scb(ahd, reset_scb); 844 845 ahd->platform_data->eh_done = &done; 846 ahd_unlock(ahd, &flags); 847 848 printk("%s: Device reset code sleeping\n", ahd_name(ahd)); 849 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 850 ahd_lock(ahd, &flags); 851 ahd->platform_data->eh_done = NULL; 852 ahd_unlock(ahd, &flags); 853 printk("%s: Device reset timer expired (active %d)\n", 854 ahd_name(ahd), dev->active); 855 retval = FAILED; 856 } 857 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); 858 859 return (retval); 860} 861 862/* 863 * Reset the SCSI bus. 864 */ 865static int 866ahd_linux_bus_reset(struct scsi_cmnd *cmd) 867{ 868 struct ahd_softc *ahd; 869 int found; 870 unsigned long flags; 871 872 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 873#ifdef AHD_DEBUG 874 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 875 printk("%s: Bus reset called for cmd %p\n", 876 ahd_name(ahd), cmd); 877#endif 878 ahd_lock(ahd, &flags); 879 880 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 881 /*initiate reset*/TRUE); 882 ahd_unlock(ahd, &flags); 883 884 if (bootverbose) 885 printk("%s: SCSI bus reset delivered. " 886 "%d SCBs aborted.\n", ahd_name(ahd), found); 887 888 return (SUCCESS); 889} 890 891struct scsi_host_template aic79xx_driver_template = { 892 .module = THIS_MODULE, 893 .name = "aic79xx", 894 .proc_name = "aic79xx", 895 .show_info = ahd_linux_show_info, 896 .write_info = ahd_proc_write_seeprom, 897 .info = ahd_linux_info, 898 .queuecommand = ahd_linux_queue, 899 .eh_abort_handler = ahd_linux_abort, 900 .eh_device_reset_handler = ahd_linux_dev_reset, 901 .eh_bus_reset_handler = ahd_linux_bus_reset, 902#if defined(__i386__) 903 .bios_param = ahd_linux_biosparam, 904#endif 905 .can_queue = AHD_MAX_QUEUE, 906 .this_id = -1, 907 .max_sectors = 8192, 908 .cmd_per_lun = 2, 909 .sdev_init = ahd_linux_sdev_init, 910 .sdev_configure = ahd_linux_sdev_configure, 911 .target_alloc = ahd_linux_target_alloc, 912 .target_destroy = ahd_linux_target_destroy, 913}; 914 915/******************************** Bus DMA *************************************/ 916int 917ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 918 bus_size_t alignment, bus_size_t boundary, 919 dma_addr_t lowaddr, dma_addr_t highaddr, 920 bus_dma_filter_t *filter, void *filterarg, 921 bus_size_t maxsize, int nsegments, 922 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 923{ 924 bus_dma_tag_t dmat; 925 926 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 927 if (dmat == NULL) 928 return (ENOMEM); 929 930 /* 931 * Linux is very simplistic about DMA memory. For now don't 932 * maintain all specification information. Once Linux supplies 933 * better facilities for doing these operations, or the 934 * needs of this particular driver change, we might need to do 935 * more here. 936 */ 937 dmat->alignment = alignment; 938 dmat->boundary = boundary; 939 dmat->maxsize = maxsize; 940 *ret_tag = dmat; 941 return (0); 942} 943 944void 945ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 946{ 947 kfree(dmat); 948} 949 950int 951ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 952 int flags, bus_dmamap_t *mapp) 953{ 954 *vaddr = dma_alloc_coherent(&ahd->dev_softc->dev, dmat->maxsize, mapp, 955 GFP_ATOMIC); 956 if (*vaddr == NULL) 957 return (ENOMEM); 958 return(0); 959} 960 961void 962ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 963 void* vaddr, bus_dmamap_t map) 964{ 965 dma_free_coherent(&ahd->dev_softc->dev, dmat->maxsize, vaddr, map); 966} 967 968int 969ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 970 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 971 void *cb_arg, int flags) 972{ 973 /* 974 * Assume for now that this will only be used during 975 * initialization and not for per-transaction buffer mapping. 976 */ 977 bus_dma_segment_t stack_sg; 978 979 stack_sg.ds_addr = map; 980 stack_sg.ds_len = dmat->maxsize; 981 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 982 return (0); 983} 984 985void 986ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 987{ 988} 989 990int 991ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 992{ 993 /* Nothing to do */ 994 return (0); 995} 996 997/********************* Platform Dependent Functions ***************************/ 998static void 999ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 1000{ 1001 1002 if ((instance >= 0) 1003 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { 1004 uint8_t *iocell_info; 1005 1006 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 1007 iocell_info[index] = value & 0xFFFF; 1008 if (bootverbose) 1009 printk("iocell[%d:%ld] = %d\n", instance, index, value); 1010 } 1011} 1012 1013static void 1014ahd_linux_setup_tag_info_global(char *p) 1015{ 1016 int tags, i, j; 1017 1018 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 1019 printk("Setting Global Tags= %d\n", tags); 1020 1021 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { 1022 for (j = 0; j < AHD_NUM_TARGETS; j++) { 1023 aic79xx_tag_info[i].tag_commands[j] = tags; 1024 } 1025 } 1026} 1027 1028static void 1029ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 1030{ 1031 1032 if ((instance >= 0) && (targ >= 0) 1033 && (instance < ARRAY_SIZE(aic79xx_tag_info)) 1034 && (targ < AHD_NUM_TARGETS)) { 1035 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 1036 if (bootverbose) 1037 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 1038 } 1039} 1040 1041static char * 1042ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 1043 void (*callback)(u_long, int, int, int32_t), 1044 u_long callback_arg) 1045{ 1046 char *tok_end; 1047 char *tok_end2; 1048 int i; 1049 int instance; 1050 int targ; 1051 int done; 1052 char tok_list[] = {'.', ',', '{', '}', '\0'}; 1053 1054 /* All options use a ':' name/arg separator */ 1055 if (*opt_arg != ':') 1056 return (opt_arg); 1057 opt_arg++; 1058 instance = -1; 1059 targ = -1; 1060 done = FALSE; 1061 /* 1062 * Restore separator that may be in 1063 * the middle of our option argument. 1064 */ 1065 tok_end = strchr(opt_arg, '\0'); 1066 if (tok_end < end) 1067 *tok_end = ','; 1068 while (!done) { 1069 switch (*opt_arg) { 1070 case '{': 1071 if (instance == -1) { 1072 instance = 0; 1073 } else { 1074 if (depth > 1) { 1075 if (targ == -1) 1076 targ = 0; 1077 } else { 1078 printk("Malformed Option %s\n", 1079 opt_name); 1080 done = TRUE; 1081 } 1082 } 1083 opt_arg++; 1084 break; 1085 case '}': 1086 if (targ != -1) 1087 targ = -1; 1088 else if (instance != -1) 1089 instance = -1; 1090 opt_arg++; 1091 break; 1092 case ',': 1093 case '.': 1094 if (instance == -1) 1095 done = TRUE; 1096 else if (targ >= 0) 1097 targ++; 1098 else if (instance >= 0) 1099 instance++; 1100 opt_arg++; 1101 break; 1102 case '\0': 1103 done = TRUE; 1104 break; 1105 default: 1106 tok_end = end; 1107 for (i = 0; tok_list[i]; i++) { 1108 tok_end2 = strchr(opt_arg, tok_list[i]); 1109 if ((tok_end2) && (tok_end2 < tok_end)) 1110 tok_end = tok_end2; 1111 } 1112 callback(callback_arg, instance, targ, 1113 simple_strtol(opt_arg, NULL, 0)); 1114 opt_arg = tok_end; 1115 break; 1116 } 1117 } 1118 return (opt_arg); 1119} 1120 1121/* 1122 * Handle Linux boot parameters. This routine allows for assigning a value 1123 * to a parameter with a ':' between the parameter and the value. 1124 * ie. aic79xx=stpwlev:1,extended 1125 */ 1126static int 1127aic79xx_setup(char *s) 1128{ 1129 int i, n; 1130 char *p; 1131 char *end; 1132 1133 static const struct { 1134 const char *name; 1135 uint32_t *flag; 1136 } options[] = { 1137 { "extended", &aic79xx_extended }, 1138 { "no_reset", &aic79xx_no_reset }, 1139 { "verbose", &aic79xx_verbose }, 1140 { "allow_memio", &aic79xx_allow_memio}, 1141#ifdef AHD_DEBUG 1142 { "debug", &ahd_debug }, 1143#endif 1144 { "periodic_otag", &aic79xx_periodic_otag }, 1145 { "pci_parity", &aic79xx_pci_parity }, 1146 { "seltime", &aic79xx_seltime }, 1147 { "tag_info", NULL }, 1148 { "global_tag_depth", NULL}, 1149 { "slewrate", NULL }, 1150 { "precomp", NULL }, 1151 { "amplitude", NULL }, 1152 { "slowcrc", &aic79xx_slowcrc }, 1153 }; 1154 1155 end = strchr(s, '\0'); 1156 1157 /* 1158 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1159 * will never be 0 in this case. 1160 */ 1161 n = 0; 1162 1163 while ((p = strsep(&s, ",.")) != NULL) { 1164 if (*p == '\0') 1165 continue; 1166 for (i = 0; i < ARRAY_SIZE(options); i++) { 1167 1168 n = strlen(options[i].name); 1169 if (strncmp(options[i].name, p, n) == 0) 1170 break; 1171 } 1172 if (i == ARRAY_SIZE(options)) 1173 continue; 1174 1175 if (strncmp(p, "global_tag_depth", n) == 0) { 1176 ahd_linux_setup_tag_info_global(p + n); 1177 } else if (strncmp(p, "tag_info", n) == 0) { 1178 s = ahd_parse_brace_option("tag_info", p + n, end, 1179 2, ahd_linux_setup_tag_info, 0); 1180 } else if (strncmp(p, "slewrate", n) == 0) { 1181 s = ahd_parse_brace_option("slewrate", 1182 p + n, end, 1, ahd_linux_setup_iocell_info, 1183 AIC79XX_SLEWRATE_INDEX); 1184 } else if (strncmp(p, "precomp", n) == 0) { 1185 s = ahd_parse_brace_option("precomp", 1186 p + n, end, 1, ahd_linux_setup_iocell_info, 1187 AIC79XX_PRECOMP_INDEX); 1188 } else if (strncmp(p, "amplitude", n) == 0) { 1189 s = ahd_parse_brace_option("amplitude", 1190 p + n, end, 1, ahd_linux_setup_iocell_info, 1191 AIC79XX_AMPLITUDE_INDEX); 1192 } else if (p[n] == ':') { 1193 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1194 } else if (!strncmp(p, "verbose", n)) { 1195 *(options[i].flag) = 1; 1196 } else { 1197 *(options[i].flag) ^= 0xFFFFFFFF; 1198 } 1199 } 1200 return 1; 1201} 1202 1203__setup("aic79xx=", aic79xx_setup); 1204 1205uint32_t aic79xx_verbose; 1206 1207int 1208ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1209{ 1210 char buf[80]; 1211 struct Scsi_Host *host; 1212 char *new_name; 1213 u_long s; 1214 int retval; 1215 1216 template->name = ahd->description; 1217 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1218 if (host == NULL) 1219 return (ENOMEM); 1220 1221 *((struct ahd_softc **)host->hostdata) = ahd; 1222 ahd->platform_data->host = host; 1223 host->can_queue = AHD_MAX_QUEUE; 1224 host->cmd_per_lun = 2; 1225 host->sg_tablesize = AHD_NSEG; 1226 host->this_id = ahd->our_id; 1227 host->irq = ahd->platform_data->irq; 1228 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1229 host->max_lun = AHD_NUM_LUNS; 1230 host->max_channel = 0; 1231 host->sg_tablesize = AHD_NSEG; 1232 ahd_lock(ahd, &s); 1233 ahd_set_unit(ahd, ahd_linux_unit++); 1234 ahd_unlock(ahd, &s); 1235 sprintf(buf, "scsi%d", host->host_no); 1236 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1237 if (new_name != NULL) { 1238 strcpy(new_name, buf); 1239 ahd_set_name(ahd, new_name); 1240 } 1241 host->unique_id = ahd->unit; 1242 ahd_linux_initialize_scsi_bus(ahd); 1243 ahd_intr_enable(ahd, TRUE); 1244 1245 host->transportt = ahd_linux_transport_template; 1246 1247 retval = scsi_add_host(host, &ahd->dev_softc->dev); 1248 if (retval) { 1249 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); 1250 scsi_host_put(host); 1251 return retval; 1252 } 1253 1254 scsi_scan_host(host); 1255 return 0; 1256} 1257 1258/* 1259 * Place the SCSI bus into a known state by either resetting it, 1260 * or forcing transfer negotiations on the next command to any 1261 * target. 1262 */ 1263static void 1264ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1265{ 1266 u_int target_id; 1267 u_int numtarg; 1268 unsigned long s; 1269 1270 target_id = 0; 1271 numtarg = 0; 1272 1273 if (aic79xx_no_reset != 0) 1274 ahd->flags &= ~AHD_RESET_BUS_A; 1275 1276 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1277 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1278 else 1279 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1280 1281 ahd_lock(ahd, &s); 1282 1283 /* 1284 * Force negotiation to async for all targets that 1285 * will not see an initial bus reset. 1286 */ 1287 for (; target_id < numtarg; target_id++) { 1288 struct ahd_devinfo devinfo; 1289 struct ahd_initiator_tinfo *tinfo; 1290 struct ahd_tmode_tstate *tstate; 1291 1292 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1293 target_id, &tstate); 1294 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1295 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1296 ahd_update_neg_request(ahd, &devinfo, tstate, 1297 tinfo, AHD_NEG_ALWAYS); 1298 } 1299 ahd_unlock(ahd, &s); 1300 /* Give the bus some time to recover */ 1301 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1302 ahd_freeze_simq(ahd); 1303 msleep(AIC79XX_RESET_DELAY); 1304 ahd_release_simq(ahd); 1305 } 1306} 1307 1308int 1309ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1310{ 1311 ahd->platform_data = 1312 kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC); 1313 if (ahd->platform_data == NULL) 1314 return (ENOMEM); 1315 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1316 ahd_lockinit(ahd); 1317 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1318 return (0); 1319} 1320 1321void 1322ahd_platform_free(struct ahd_softc *ahd) 1323{ 1324 struct scsi_target *starget; 1325 int i; 1326 1327 if (ahd->platform_data != NULL) { 1328 /* destroy all of the device and target objects */ 1329 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1330 starget = ahd->platform_data->starget[i]; 1331 if (starget != NULL) { 1332 ahd->platform_data->starget[i] = NULL; 1333 } 1334 } 1335 1336 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1337 free_irq(ahd->platform_data->irq, ahd); 1338 if (ahd->tags[0] == BUS_SPACE_PIO 1339 && ahd->bshs[0].ioport != 0) 1340 release_region(ahd->bshs[0].ioport, 256); 1341 if (ahd->tags[1] == BUS_SPACE_PIO 1342 && ahd->bshs[1].ioport != 0) 1343 release_region(ahd->bshs[1].ioport, 256); 1344 if (ahd->tags[0] == BUS_SPACE_MEMIO 1345 && ahd->bshs[0].maddr != NULL) { 1346 iounmap(ahd->bshs[0].maddr); 1347 release_mem_region(ahd->platform_data->mem_busaddr, 1348 0x1000); 1349 } 1350 if (ahd->platform_data->host) 1351 scsi_host_put(ahd->platform_data->host); 1352 1353 kfree(ahd->platform_data); 1354 } 1355} 1356 1357void 1358ahd_platform_init(struct ahd_softc *ahd) 1359{ 1360 /* 1361 * Lookup and commit any modified IO Cell options. 1362 */ 1363 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 1364 const struct ahd_linux_iocell_opts *iocell_opts; 1365 1366 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1367 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1368 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1369 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1370 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1371 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1372 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1373 } 1374 1375} 1376 1377void 1378ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1379{ 1380 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1381 SCB_GET_CHANNEL(ahd, scb), 1382 SCB_GET_LUN(scb), SCB_LIST_NULL, 1383 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1384} 1385 1386void 1387ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev, 1388 struct ahd_devinfo *devinfo, ahd_queue_alg alg) 1389{ 1390 struct ahd_linux_device *dev; 1391 int was_queuing; 1392 int now_queuing; 1393 1394 if (sdev == NULL) 1395 return; 1396 1397 dev = scsi_transport_device_data(sdev); 1398 1399 if (dev == NULL) 1400 return; 1401 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1402 switch (alg) { 1403 default: 1404 case AHD_QUEUE_NONE: 1405 now_queuing = 0; 1406 break; 1407 case AHD_QUEUE_BASIC: 1408 now_queuing = AHD_DEV_Q_BASIC; 1409 break; 1410 case AHD_QUEUE_TAGGED: 1411 now_queuing = AHD_DEV_Q_TAGGED; 1412 break; 1413 } 1414 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1415 && (was_queuing != now_queuing) 1416 && (dev->active != 0)) { 1417 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1418 dev->qfrozen++; 1419 } 1420 1421 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1422 if (now_queuing) { 1423 u_int usertags; 1424 1425 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1426 if (!was_queuing) { 1427 /* 1428 * Start out aggressively and allow our 1429 * dynamic queue depth algorithm to take 1430 * care of the rest. 1431 */ 1432 dev->maxtags = usertags; 1433 dev->openings = dev->maxtags - dev->active; 1434 } 1435 if (dev->maxtags == 0) { 1436 /* 1437 * Queueing is disabled by the user. 1438 */ 1439 dev->openings = 1; 1440 } else if (alg == AHD_QUEUE_TAGGED) { 1441 dev->flags |= AHD_DEV_Q_TAGGED; 1442 if (aic79xx_periodic_otag != 0) 1443 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1444 } else 1445 dev->flags |= AHD_DEV_Q_BASIC; 1446 } else { 1447 /* We can only have one opening. */ 1448 dev->maxtags = 0; 1449 dev->openings = 1 - dev->active; 1450 } 1451 1452 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1453 case AHD_DEV_Q_BASIC: 1454 case AHD_DEV_Q_TAGGED: 1455 scsi_change_queue_depth(sdev, 1456 dev->openings + dev->active); 1457 break; 1458 default: 1459 /* 1460 * We allow the OS to queue 2 untagged transactions to 1461 * us at any time even though we can only execute them 1462 * serially on the controller/device. This should 1463 * remove some latency. 1464 */ 1465 scsi_change_queue_depth(sdev, 1); 1466 break; 1467 } 1468} 1469 1470int 1471ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1472 int lun, u_int tag, role_t role, uint32_t status) 1473{ 1474 return 0; 1475} 1476 1477static u_int 1478ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1479{ 1480 static int warned_user; 1481 u_int tags; 1482 1483 tags = 0; 1484 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1485 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { 1486 1487 if (warned_user == 0) { 1488 printk(KERN_WARNING 1489"aic79xx: WARNING: Insufficient tag_info instances\n" 1490"aic79xx: for installed controllers. Using defaults\n" 1491"aic79xx: Please update the aic79xx_tag_info array in\n" 1492"aic79xx: the aic79xx_osm.c source file.\n"); 1493 warned_user++; 1494 } 1495 tags = AHD_MAX_QUEUE; 1496 } else { 1497 adapter_tag_info_t *tag_info; 1498 1499 tag_info = &aic79xx_tag_info[ahd->unit]; 1500 tags = tag_info->tag_commands[devinfo->target_offset]; 1501 if (tags > AHD_MAX_QUEUE) 1502 tags = AHD_MAX_QUEUE; 1503 } 1504 } 1505 return (tags); 1506} 1507 1508/* 1509 * Determines the queue depth for a given device. 1510 */ 1511static void 1512ahd_linux_device_queue_depth(struct scsi_device *sdev) 1513{ 1514 struct ahd_devinfo devinfo; 1515 u_int tags; 1516 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1517 1518 ahd_compile_devinfo(&devinfo, 1519 ahd->our_id, 1520 sdev->sdev_target->id, sdev->lun, 1521 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1522 ROLE_INITIATOR); 1523 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1524 if (tags != 0 && sdev->tagged_supported != 0) { 1525 1526 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); 1527 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1528 devinfo.lun, AC_TRANSFER_NEG); 1529 ahd_print_devinfo(ahd, &devinfo); 1530 printk("Tagged Queuing enabled. Depth %d\n", tags); 1531 } else { 1532 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); 1533 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1534 devinfo.lun, AC_TRANSFER_NEG); 1535 } 1536} 1537 1538static int 1539ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1540 struct scsi_cmnd *cmd) 1541{ 1542 struct scb *scb; 1543 struct hardware_scb *hscb; 1544 struct ahd_initiator_tinfo *tinfo; 1545 struct ahd_tmode_tstate *tstate; 1546 u_int col_idx; 1547 uint16_t mask; 1548 unsigned long flags; 1549 int nseg; 1550 1551 nseg = scsi_dma_map(cmd); 1552 if (nseg < 0) 1553 return SCSI_MLQUEUE_HOST_BUSY; 1554 1555 ahd_lock(ahd, &flags); 1556 1557 /* 1558 * Get an scb to use. 1559 */ 1560 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1561 cmd->device->id, &tstate); 1562 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1563 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1564 col_idx = AHD_NEVER_COL_IDX; 1565 } else { 1566 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1567 cmd->device->lun); 1568 } 1569 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1570 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1571 ahd_unlock(ahd, &flags); 1572 scsi_dma_unmap(cmd); 1573 return SCSI_MLQUEUE_HOST_BUSY; 1574 } 1575 1576 scb->io_ctx = cmd; 1577 scb->platform_data->dev = dev; 1578 hscb = scb->hscb; 1579 cmd->host_scribble = (char *)scb; 1580 1581 /* 1582 * Fill out basics of the HSCB. 1583 */ 1584 hscb->control = 0; 1585 hscb->scsiid = ahd_build_scsiid(ahd, cmd->device); 1586 hscb->lun = cmd->device->lun; 1587 scb->hscb->task_management = 0; 1588 mask = SCB_GET_TARGET_MASK(ahd, scb); 1589 1590 if ((ahd->user_discenable & mask) != 0) 1591 hscb->control |= DISCENB; 1592 1593 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1594 scb->flags |= SCB_PACKETIZED; 1595 1596 if ((tstate->auto_negotiate & mask) != 0) { 1597 scb->flags |= SCB_AUTO_NEGOTIATE; 1598 scb->hscb->control |= MK_MESSAGE; 1599 } 1600 1601 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1602 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1603 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1604 hscb->control |= ORDERED_QUEUE_TAG; 1605 dev->commands_since_idle_or_otag = 0; 1606 } else { 1607 hscb->control |= SIMPLE_QUEUE_TAG; 1608 } 1609 } 1610 1611 hscb->cdb_len = cmd->cmd_len; 1612 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1613 1614 scb->platform_data->xfer_len = 0; 1615 ahd_set_residual(scb, 0); 1616 ahd_set_sense_residual(scb, 0); 1617 scb->sg_count = 0; 1618 1619 if (nseg > 0) { 1620 void *sg = scb->sg_list; 1621 struct scatterlist *cur_seg; 1622 int i; 1623 1624 scb->platform_data->xfer_len = 0; 1625 1626 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1627 dma_addr_t addr; 1628 bus_size_t len; 1629 1630 addr = sg_dma_address(cur_seg); 1631 len = sg_dma_len(cur_seg); 1632 scb->platform_data->xfer_len += len; 1633 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1634 i == (nseg - 1)); 1635 } 1636 } 1637 1638 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1639 dev->openings--; 1640 dev->active++; 1641 dev->commands_issued++; 1642 1643 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1644 dev->commands_since_idle_or_otag++; 1645 scb->flags |= SCB_ACTIVE; 1646 ahd_queue_scb(ahd, scb); 1647 1648 ahd_unlock(ahd, &flags); 1649 1650 return 0; 1651} 1652 1653/* 1654 * SCSI controller interrupt handler. 1655 */ 1656irqreturn_t 1657ahd_linux_isr(int irq, void *dev_id) 1658{ 1659 struct ahd_softc *ahd; 1660 u_long flags; 1661 int ours; 1662 1663 ahd = (struct ahd_softc *) dev_id; 1664 ahd_lock(ahd, &flags); 1665 ours = ahd_intr(ahd); 1666 ahd_unlock(ahd, &flags); 1667 return IRQ_RETVAL(ours); 1668} 1669 1670void 1671ahd_send_async(struct ahd_softc *ahd, char channel, 1672 u_int target, u_int lun, ac_code code) 1673{ 1674 switch (code) { 1675 case AC_TRANSFER_NEG: 1676 { 1677 struct scsi_target *starget; 1678 struct ahd_initiator_tinfo *tinfo; 1679 struct ahd_tmode_tstate *tstate; 1680 unsigned int target_ppr_options; 1681 1682 BUG_ON(target == CAM_TARGET_WILDCARD); 1683 1684 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1685 target, &tstate); 1686 1687 /* 1688 * Don't bother reporting results while 1689 * negotiations are still pending. 1690 */ 1691 if (tinfo->curr.period != tinfo->goal.period 1692 || tinfo->curr.width != tinfo->goal.width 1693 || tinfo->curr.offset != tinfo->goal.offset 1694 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1695 if (bootverbose == 0) 1696 break; 1697 1698 /* 1699 * Don't bother reporting results that 1700 * are identical to those last reported. 1701 */ 1702 starget = ahd->platform_data->starget[target]; 1703 if (starget == NULL) 1704 break; 1705 1706 target_ppr_options = 1707 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1708 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1709 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1710 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1711 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1712 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1713 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1714 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1715 1716 if (tinfo->curr.period == spi_period(starget) 1717 && tinfo->curr.width == spi_width(starget) 1718 && tinfo->curr.offset == spi_offset(starget) 1719 && tinfo->curr.ppr_options == target_ppr_options) 1720 if (bootverbose == 0) 1721 break; 1722 1723 spi_period(starget) = tinfo->curr.period; 1724 spi_width(starget) = tinfo->curr.width; 1725 spi_offset(starget) = tinfo->curr.offset; 1726 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1727 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1728 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1729 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1730 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1731 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1732 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1733 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1734 spi_display_xfer_agreement(starget); 1735 break; 1736 } 1737 case AC_SENT_BDR: 1738 { 1739 WARN_ON(lun != CAM_LUN_WILDCARD); 1740 scsi_report_device_reset(ahd->platform_data->host, 1741 channel - 'A', target); 1742 break; 1743 } 1744 case AC_BUS_RESET: 1745 if (ahd->platform_data->host != NULL) { 1746 scsi_report_bus_reset(ahd->platform_data->host, 1747 channel - 'A'); 1748 } 1749 break; 1750 default: 1751 panic("ahd_send_async: Unexpected async event"); 1752 } 1753} 1754 1755/* 1756 * Calls the higher level scsi done function and frees the scb. 1757 */ 1758void 1759ahd_done(struct ahd_softc *ahd, struct scb *scb) 1760{ 1761 struct scsi_cmnd *cmd; 1762 struct ahd_linux_device *dev; 1763 1764 if ((scb->flags & SCB_ACTIVE) == 0) { 1765 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1766 ahd_dump_card_state(ahd); 1767 panic("Stopping for safety"); 1768 } 1769 LIST_REMOVE(scb, pending_links); 1770 cmd = scb->io_ctx; 1771 dev = scb->platform_data->dev; 1772 dev->active--; 1773 dev->openings++; 1774 if (cmd) { 1775 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1776 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1777 dev->qfrozen--; 1778 } 1779 } else if (scb->flags & SCB_DEVICE_RESET) { 1780 if (ahd->platform_data->eh_done) 1781 complete(ahd->platform_data->eh_done); 1782 ahd_free_scb(ahd, scb); 1783 return; 1784 } 1785 ahd_linux_unmap_scb(ahd, scb); 1786 1787 /* 1788 * Guard against stale sense data. 1789 * The Linux mid-layer assumes that sense 1790 * was retrieved anytime the first byte of 1791 * the sense buffer looks "sane". 1792 */ 1793 cmd->sense_buffer[0] = 0; 1794 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1795#ifdef AHD_REPORT_UNDERFLOWS 1796 uint32_t amount_xferred; 1797 1798 amount_xferred = 1799 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1800#endif 1801 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1802#ifdef AHD_DEBUG 1803 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1804 ahd_print_path(ahd, scb); 1805 printk("Set CAM_UNCOR_PARITY\n"); 1806 } 1807#endif 1808 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1809#ifdef AHD_REPORT_UNDERFLOWS 1810 /* 1811 * This code is disabled by default as some 1812 * clients of the SCSI system do not properly 1813 * initialize the underflow parameter. This 1814 * results in spurious termination of commands 1815 * that complete as expected (e.g. underflow is 1816 * allowed as command can return variable amounts 1817 * of data. 1818 */ 1819 } else if (amount_xferred < scb->io_ctx->underflow) { 1820 u_int i; 1821 1822 ahd_print_path(ahd, scb); 1823 printk("CDB:"); 1824 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1825 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1826 printk("\n"); 1827 ahd_print_path(ahd, scb); 1828 printk("Saw underflow (%ld of %ld bytes). " 1829 "Treated as error\n", 1830 ahd_get_residual(scb), 1831 ahd_get_transfer_length(scb)); 1832 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1833#endif 1834 } else { 1835 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1836 } 1837 } else if (cmd && 1838 ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1839 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1840 } 1841 1842 if (dev->openings == 1 1843 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1844 && ahd_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL) 1845 dev->tag_success_count++; 1846 /* 1847 * Some devices deal with temporary internal resource 1848 * shortages by returning queue full. When the queue 1849 * full occurrs, we throttle back. Slowly try to get 1850 * back to our previous queue depth. 1851 */ 1852 if ((dev->openings + dev->active) < dev->maxtags 1853 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1854 dev->tag_success_count = 0; 1855 dev->openings++; 1856 } 1857 1858 if (dev->active == 0) 1859 dev->commands_since_idle_or_otag = 0; 1860 1861 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1862 printk("Recovery SCB completes\n"); 1863 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1864 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1865 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1866 1867 if (ahd->platform_data->eh_done) 1868 complete(ahd->platform_data->eh_done); 1869 } 1870 1871 ahd_free_scb(ahd, scb); 1872 if (cmd) 1873 ahd_linux_queue_cmd_complete(ahd, cmd); 1874} 1875 1876static void 1877ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1878 struct scsi_device *sdev, struct scb *scb) 1879{ 1880 struct ahd_devinfo devinfo; 1881 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1882 1883 ahd_compile_devinfo(&devinfo, 1884 ahd->our_id, 1885 sdev->sdev_target->id, sdev->lun, 1886 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1887 ROLE_INITIATOR); 1888 1889 /* 1890 * We don't currently trust the mid-layer to 1891 * properly deal with queue full or busy. So, 1892 * when one occurs, we tell the mid-layer to 1893 * unconditionally requeue the command to us 1894 * so that we can retry it ourselves. We also 1895 * implement our own throttling mechanism so 1896 * we don't clobber the device with too many 1897 * commands. 1898 */ 1899 switch (ahd_get_scsi_status(scb)) { 1900 default: 1901 break; 1902 case SAM_STAT_CHECK_CONDITION: 1903 case SAM_STAT_COMMAND_TERMINATED: 1904 { 1905 struct scsi_cmnd *cmd; 1906 1907 /* 1908 * Copy sense information to the OS's cmd 1909 * structure if it is available. 1910 */ 1911 cmd = scb->io_ctx; 1912 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1913 struct scsi_status_iu_header *siu; 1914 u_int sense_size; 1915 u_int sense_offset; 1916 1917 if (scb->flags & SCB_SENSE) { 1918 sense_size = min(sizeof(struct scsi_sense_data) 1919 - ahd_get_sense_residual(scb), 1920 (u_long)SCSI_SENSE_BUFFERSIZE); 1921 sense_offset = 0; 1922 } else { 1923 /* 1924 * Copy only the sense data into the provided 1925 * buffer. 1926 */ 1927 siu = (struct scsi_status_iu_header *) 1928 scb->sense_data; 1929 sense_size = min_t(size_t, 1930 scsi_4btoul(siu->sense_length), 1931 SCSI_SENSE_BUFFERSIZE); 1932 sense_offset = SIU_SENSE_OFFSET(siu); 1933 } 1934 1935 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1936 memcpy(cmd->sense_buffer, 1937 ahd_get_sense_buf(ahd, scb) 1938 + sense_offset, sense_size); 1939 set_status_byte(cmd, SAM_STAT_CHECK_CONDITION); 1940 1941#ifdef AHD_DEBUG 1942 if (ahd_debug & AHD_SHOW_SENSE) { 1943 int i; 1944 1945 printk("Copied %d bytes of sense data at %d:", 1946 sense_size, sense_offset); 1947 for (i = 0; i < sense_size; i++) { 1948 if ((i & 0xF) == 0) 1949 printk("\n"); 1950 printk("0x%x ", cmd->sense_buffer[i]); 1951 } 1952 printk("\n"); 1953 } 1954#endif 1955 } 1956 break; 1957 } 1958 case SAM_STAT_TASK_SET_FULL: 1959 /* 1960 * By the time the core driver has returned this 1961 * command, all other commands that were queued 1962 * to us but not the device have been returned. 1963 * This ensures that dev->active is equal to 1964 * the number of commands actually queued to 1965 * the device. 1966 */ 1967 dev->tag_success_count = 0; 1968 if (dev->active != 0) { 1969 /* 1970 * Drop our opening count to the number 1971 * of commands currently outstanding. 1972 */ 1973 dev->openings = 0; 1974#ifdef AHD_DEBUG 1975 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1976 ahd_print_path(ahd, scb); 1977 printk("Dropping tag count to %d\n", 1978 dev->active); 1979 } 1980#endif 1981 if (dev->active == dev->tags_on_last_queuefull) { 1982 1983 dev->last_queuefull_same_count++; 1984 /* 1985 * If we repeatedly see a queue full 1986 * at the same queue depth, this 1987 * device has a fixed number of tag 1988 * slots. Lock in this tag depth 1989 * so we stop seeing queue fulls from 1990 * this device. 1991 */ 1992 if (dev->last_queuefull_same_count 1993 == AHD_LOCK_TAGS_COUNT) { 1994 dev->maxtags = dev->active; 1995 ahd_print_path(ahd, scb); 1996 printk("Locking max tag count at %d\n", 1997 dev->active); 1998 } 1999 } else { 2000 dev->tags_on_last_queuefull = dev->active; 2001 dev->last_queuefull_same_count = 0; 2002 } 2003 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 2004 ahd_set_scsi_status(scb, SAM_STAT_GOOD); 2005 ahd_platform_set_tags(ahd, sdev, &devinfo, 2006 (dev->flags & AHD_DEV_Q_BASIC) 2007 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2008 break; 2009 } 2010 /* 2011 * Drop down to a single opening, and treat this 2012 * as if the target returned BUSY SCSI status. 2013 */ 2014 dev->openings = 1; 2015 ahd_platform_set_tags(ahd, sdev, &devinfo, 2016 (dev->flags & AHD_DEV_Q_BASIC) 2017 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2018 ahd_set_scsi_status(scb, SAM_STAT_BUSY); 2019 } 2020} 2021 2022static void 2023ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 2024{ 2025 int status; 2026 int new_status = DID_OK; 2027 int do_fallback = 0; 2028 int scsi_status; 2029 struct scsi_sense_data *sense; 2030 2031 /* 2032 * Map CAM error codes into Linux Error codes. We 2033 * avoid the conversion so that the DV code has the 2034 * full error information available when making 2035 * state change decisions. 2036 */ 2037 2038 status = ahd_cmd_get_transaction_status(cmd); 2039 switch (status) { 2040 case CAM_REQ_INPROG: 2041 case CAM_REQ_CMP: 2042 new_status = DID_OK; 2043 break; 2044 case CAM_AUTOSENSE_FAIL: 2045 new_status = DID_ERROR; 2046 fallthrough; 2047 case CAM_SCSI_STATUS_ERROR: 2048 scsi_status = ahd_cmd_get_scsi_status(cmd); 2049 2050 switch(scsi_status) { 2051 case SAM_STAT_COMMAND_TERMINATED: 2052 case SAM_STAT_CHECK_CONDITION: 2053 sense = (struct scsi_sense_data *) 2054 cmd->sense_buffer; 2055 if (sense->extra_len >= 5 && 2056 (sense->add_sense_code == 0x47 2057 || sense->add_sense_code == 0x48)) 2058 do_fallback = 1; 2059 break; 2060 default: 2061 break; 2062 } 2063 break; 2064 case CAM_REQ_ABORTED: 2065 new_status = DID_ABORT; 2066 break; 2067 case CAM_BUSY: 2068 new_status = DID_BUS_BUSY; 2069 break; 2070 case CAM_REQ_INVALID: 2071 case CAM_PATH_INVALID: 2072 new_status = DID_BAD_TARGET; 2073 break; 2074 case CAM_SEL_TIMEOUT: 2075 new_status = DID_NO_CONNECT; 2076 break; 2077 case CAM_SCSI_BUS_RESET: 2078 case CAM_BDR_SENT: 2079 new_status = DID_RESET; 2080 break; 2081 case CAM_UNCOR_PARITY: 2082 new_status = DID_PARITY; 2083 do_fallback = 1; 2084 break; 2085 case CAM_CMD_TIMEOUT: 2086 new_status = DID_TIME_OUT; 2087 do_fallback = 1; 2088 break; 2089 case CAM_REQ_CMP_ERR: 2090 case CAM_UNEXP_BUSFREE: 2091 case CAM_DATA_RUN_ERR: 2092 new_status = DID_ERROR; 2093 do_fallback = 1; 2094 break; 2095 case CAM_UA_ABORT: 2096 case CAM_NO_HBA: 2097 case CAM_SEQUENCE_FAIL: 2098 case CAM_CCB_LEN_ERR: 2099 case CAM_PROVIDE_FAIL: 2100 case CAM_REQ_TERMIO: 2101 case CAM_UNREC_HBA_ERROR: 2102 case CAM_REQ_TOO_BIG: 2103 new_status = DID_ERROR; 2104 break; 2105 case CAM_REQUEUE_REQ: 2106 new_status = DID_REQUEUE; 2107 break; 2108 default: 2109 /* We should never get here */ 2110 new_status = DID_ERROR; 2111 break; 2112 } 2113 2114 if (do_fallback) { 2115 printk("%s: device overrun (status %x) on %d:%d:%d\n", 2116 ahd_name(ahd), status, cmd->device->channel, 2117 cmd->device->id, (u8)cmd->device->lun); 2118 } 2119 2120 ahd_cmd_set_transaction_status(cmd, new_status); 2121 2122 scsi_done(cmd); 2123} 2124 2125static void 2126ahd_freeze_simq(struct ahd_softc *ahd) 2127{ 2128 scsi_block_requests(ahd->platform_data->host); 2129} 2130 2131static void 2132ahd_release_simq(struct ahd_softc *ahd) 2133{ 2134 scsi_unblock_requests(ahd->platform_data->host); 2135} 2136 2137static int 2138ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2139{ 2140 struct ahd_softc *ahd; 2141 struct ahd_linux_device *dev; 2142 struct scb *pending_scb; 2143 u_int saved_scbptr; 2144 u_int active_scbptr; 2145 u_int last_phase; 2146 u_int cdb_byte; 2147 int retval = SUCCESS; 2148 int was_paused; 2149 int paused; 2150 int wait; 2151 int disconnected; 2152 ahd_mode_state saved_modes; 2153 unsigned long flags; 2154 2155 pending_scb = NULL; 2156 paused = FALSE; 2157 wait = FALSE; 2158 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2159 2160 scmd_printk(KERN_INFO, cmd, 2161 "Attempting to queue an ABORT message:"); 2162 2163 printk("CDB:"); 2164 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2165 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2166 printk("\n"); 2167 2168 ahd_lock(ahd, &flags); 2169 2170 /* 2171 * First determine if we currently own this command. 2172 * Start by searching the device queue. If not found 2173 * there, check the pending_scb list. If not found 2174 * at all, and the system wanted us to just abort the 2175 * command, return success. 2176 */ 2177 dev = scsi_transport_device_data(cmd->device); 2178 2179 if (dev == NULL) { 2180 /* 2181 * No target device for this command exists, 2182 * so we must not still own the command. 2183 */ 2184 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2185 goto done; 2186 } 2187 2188 /* 2189 * See if we can find a matching cmd in the pending list. 2190 */ 2191 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2192 if (pending_scb->io_ctx == cmd) 2193 break; 2194 } 2195 2196 if (pending_scb == NULL) { 2197 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2198 goto done; 2199 } 2200 2201 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2202 /* 2203 * We can't queue two recovery actions using the same SCB 2204 */ 2205 retval = FAILED; 2206 goto done; 2207 } 2208 2209 /* 2210 * Ensure that the card doesn't do anything 2211 * behind our back. Also make sure that we 2212 * didn't "just" miss an interrupt that would 2213 * affect this cmd. 2214 */ 2215 was_paused = ahd_is_paused(ahd); 2216 ahd_pause_and_flushwork(ahd); 2217 paused = TRUE; 2218 2219 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2220 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2221 goto done; 2222 } 2223 2224 printk("%s: At time of recovery, card was %spaused\n", 2225 ahd_name(ahd), was_paused ? "" : "not "); 2226 ahd_dump_card_state(ahd); 2227 2228 disconnected = TRUE; 2229 if (ahd_search_qinfifo(ahd, cmd->device->id, 2230 cmd->device->channel + 'A', 2231 cmd->device->lun, 2232 pending_scb->hscb->tag, 2233 ROLE_INITIATOR, CAM_REQ_ABORTED, 2234 SEARCH_COMPLETE) > 0) { 2235 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2236 ahd_name(ahd), cmd->device->channel, 2237 cmd->device->id, (u8)cmd->device->lun); 2238 goto done; 2239 } 2240 2241 saved_modes = ahd_save_modes(ahd); 2242 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2243 last_phase = ahd_inb(ahd, LASTPHASE); 2244 saved_scbptr = ahd_get_scbptr(ahd); 2245 active_scbptr = saved_scbptr; 2246 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2247 struct scb *bus_scb; 2248 2249 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2250 if (bus_scb == pending_scb) 2251 disconnected = FALSE; 2252 } 2253 2254 /* 2255 * At this point, pending_scb is the scb associated with the 2256 * passed in command. That command is currently active on the 2257 * bus or is in the disconnected state. 2258 */ 2259 ahd_inb(ahd, SAVED_SCSIID); 2260 if (last_phase != P_BUSFREE 2261 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2262 2263 /* 2264 * We're active on the bus, so assert ATN 2265 * and hope that the target responds. 2266 */ 2267 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2268 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2269 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2270 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2271 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2272 wait = TRUE; 2273 } else if (disconnected) { 2274 2275 /* 2276 * Actually re-queue this SCB in an attempt 2277 * to select the device before it reconnects. 2278 */ 2279 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2280 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2281 pending_scb->hscb->cdb_len = 0; 2282 pending_scb->hscb->task_attribute = 0; 2283 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2284 2285 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2286 /* 2287 * Mark the SCB has having an outstanding 2288 * task management function. Should the command 2289 * complete normally before the task management 2290 * function can be sent, the host will be notified 2291 * to abort our requeued SCB. 2292 */ 2293 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2294 pending_scb->hscb->task_management); 2295 } else { 2296 /* 2297 * If non-packetized, set the MK_MESSAGE control 2298 * bit indicating that we desire to send a message. 2299 * We also set the disconnected flag since there is 2300 * no guarantee that our SCB control byte matches 2301 * the version on the card. We don't want the 2302 * sequencer to abort the command thinking an 2303 * unsolicited reselection occurred. 2304 */ 2305 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2306 2307 /* 2308 * The sequencer will never re-reference the 2309 * in-core SCB. To make sure we are notified 2310 * during reselection, set the MK_MESSAGE flag in 2311 * the card's copy of the SCB. 2312 */ 2313 ahd_outb(ahd, SCB_CONTROL, 2314 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2315 } 2316 2317 /* 2318 * Clear out any entries in the QINFIFO first 2319 * so we are the next SCB for this target 2320 * to run. 2321 */ 2322 ahd_search_qinfifo(ahd, cmd->device->id, 2323 cmd->device->channel + 'A', cmd->device->lun, 2324 SCB_LIST_NULL, ROLE_INITIATOR, 2325 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2326 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2327 ahd_set_scbptr(ahd, saved_scbptr); 2328 ahd_print_path(ahd, pending_scb); 2329 printk("Device is disconnected, re-queuing SCB\n"); 2330 wait = TRUE; 2331 } else { 2332 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2333 retval = FAILED; 2334 } 2335 2336 2337 ahd_restore_modes(ahd, saved_modes); 2338done: 2339 if (paused) 2340 ahd_unpause(ahd); 2341 if (wait) { 2342 DECLARE_COMPLETION_ONSTACK(done); 2343 2344 ahd->platform_data->eh_done = &done; 2345 ahd_unlock(ahd, &flags); 2346 2347 printk("%s: Recovery code sleeping\n", ahd_name(ahd)); 2348 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2349 ahd_lock(ahd, &flags); 2350 ahd->platform_data->eh_done = NULL; 2351 ahd_unlock(ahd, &flags); 2352 printk("%s: Timer Expired (active %d)\n", 2353 ahd_name(ahd), dev->active); 2354 retval = FAILED; 2355 } 2356 printk("Recovery code awake\n"); 2357 } else 2358 ahd_unlock(ahd, &flags); 2359 2360 if (retval != SUCCESS) 2361 printk("%s: Command abort returning 0x%x\n", 2362 ahd_name(ahd), retval); 2363 2364 return retval; 2365} 2366 2367static void ahd_linux_set_width(struct scsi_target *starget, int width) 2368{ 2369 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2370 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2371 struct ahd_devinfo devinfo; 2372 unsigned long flags; 2373 2374 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2375 starget->channel + 'A', ROLE_INITIATOR); 2376 ahd_lock(ahd, &flags); 2377 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2378 ahd_unlock(ahd, &flags); 2379} 2380 2381static void ahd_linux_set_period(struct scsi_target *starget, int period) 2382{ 2383 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2384 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2385 struct ahd_tmode_tstate *tstate; 2386 struct ahd_initiator_tinfo *tinfo 2387 = ahd_fetch_transinfo(ahd, 2388 starget->channel + 'A', 2389 shost->this_id, starget->id, &tstate); 2390 struct ahd_devinfo devinfo; 2391 unsigned int ppr_options = tinfo->goal.ppr_options; 2392 unsigned int dt; 2393 unsigned long flags; 2394 unsigned long offset = tinfo->goal.offset; 2395 2396#ifdef AHD_DEBUG 2397 if ((ahd_debug & AHD_SHOW_DV) != 0) 2398 printk("%s: set period to %d\n", ahd_name(ahd), period); 2399#endif 2400 if (offset == 0) 2401 offset = MAX_OFFSET; 2402 2403 if (period < 8) 2404 period = 8; 2405 if (period < 10) { 2406 if (spi_max_width(starget)) { 2407 ppr_options |= MSG_EXT_PPR_DT_REQ; 2408 if (period == 8) 2409 ppr_options |= MSG_EXT_PPR_IU_REQ; 2410 } else 2411 period = 10; 2412 } 2413 2414 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2415 2416 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2417 starget->channel + 'A', ROLE_INITIATOR); 2418 2419 /* all PPR requests apart from QAS require wide transfers */ 2420 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2421 if (spi_width(starget) == 0) 2422 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2423 } 2424 2425 ahd_find_syncrate(ahd, &period, &ppr_options, 2426 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2427 2428 ahd_lock(ahd, &flags); 2429 ahd_set_syncrate(ahd, &devinfo, period, offset, 2430 ppr_options, AHD_TRANS_GOAL, FALSE); 2431 ahd_unlock(ahd, &flags); 2432} 2433 2434static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2435{ 2436 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2437 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2438 struct ahd_tmode_tstate *tstate; 2439 struct ahd_initiator_tinfo *tinfo 2440 = ahd_fetch_transinfo(ahd, 2441 starget->channel + 'A', 2442 shost->this_id, starget->id, &tstate); 2443 struct ahd_devinfo devinfo; 2444 unsigned int ppr_options = 0; 2445 unsigned int period = 0; 2446 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2447 unsigned long flags; 2448 2449#ifdef AHD_DEBUG 2450 if ((ahd_debug & AHD_SHOW_DV) != 0) 2451 printk("%s: set offset to %d\n", ahd_name(ahd), offset); 2452#endif 2453 2454 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2455 starget->channel + 'A', ROLE_INITIATOR); 2456 if (offset != 0) { 2457 period = tinfo->goal.period; 2458 ppr_options = tinfo->goal.ppr_options; 2459 ahd_find_syncrate(ahd, &period, &ppr_options, 2460 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2461 } 2462 2463 ahd_lock(ahd, &flags); 2464 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2465 AHD_TRANS_GOAL, FALSE); 2466 ahd_unlock(ahd, &flags); 2467} 2468 2469static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2470{ 2471 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2472 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2473 struct ahd_tmode_tstate *tstate; 2474 struct ahd_initiator_tinfo *tinfo 2475 = ahd_fetch_transinfo(ahd, 2476 starget->channel + 'A', 2477 shost->this_id, starget->id, &tstate); 2478 struct ahd_devinfo devinfo; 2479 unsigned int ppr_options = tinfo->goal.ppr_options 2480 & ~MSG_EXT_PPR_DT_REQ; 2481 unsigned int period = tinfo->goal.period; 2482 unsigned int width = tinfo->goal.width; 2483 unsigned long flags; 2484 2485#ifdef AHD_DEBUG 2486 if ((ahd_debug & AHD_SHOW_DV) != 0) 2487 printk("%s: %s DT\n", ahd_name(ahd), 2488 dt ? "enabling" : "disabling"); 2489#endif 2490 if (dt && spi_max_width(starget)) { 2491 ppr_options |= MSG_EXT_PPR_DT_REQ; 2492 if (!width) 2493 ahd_linux_set_width(starget, 1); 2494 } else { 2495 if (period <= 9) 2496 period = 10; /* If resetting DT, period must be >= 25ns */ 2497 /* IU is invalid without DT set */ 2498 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2499 } 2500 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2501 starget->channel + 'A', ROLE_INITIATOR); 2502 ahd_find_syncrate(ahd, &period, &ppr_options, 2503 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2504 2505 ahd_lock(ahd, &flags); 2506 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2507 ppr_options, AHD_TRANS_GOAL, FALSE); 2508 ahd_unlock(ahd, &flags); 2509} 2510 2511static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2512{ 2513 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2514 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2515 struct ahd_tmode_tstate *tstate; 2516 struct ahd_initiator_tinfo *tinfo 2517 = ahd_fetch_transinfo(ahd, 2518 starget->channel + 'A', 2519 shost->this_id, starget->id, &tstate); 2520 struct ahd_devinfo devinfo; 2521 unsigned int ppr_options = tinfo->goal.ppr_options 2522 & ~MSG_EXT_PPR_QAS_REQ; 2523 unsigned int period = tinfo->goal.period; 2524 unsigned int dt; 2525 unsigned long flags; 2526 2527#ifdef AHD_DEBUG 2528 if ((ahd_debug & AHD_SHOW_DV) != 0) 2529 printk("%s: %s QAS\n", ahd_name(ahd), 2530 qas ? "enabling" : "disabling"); 2531#endif 2532 2533 if (qas) { 2534 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2535 } 2536 2537 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2538 2539 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2540 starget->channel + 'A', ROLE_INITIATOR); 2541 ahd_find_syncrate(ahd, &period, &ppr_options, 2542 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2543 2544 ahd_lock(ahd, &flags); 2545 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2546 ppr_options, AHD_TRANS_GOAL, FALSE); 2547 ahd_unlock(ahd, &flags); 2548} 2549 2550static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 2551{ 2552 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2553 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2554 struct ahd_tmode_tstate *tstate; 2555 struct ahd_initiator_tinfo *tinfo 2556 = ahd_fetch_transinfo(ahd, 2557 starget->channel + 'A', 2558 shost->this_id, starget->id, &tstate); 2559 struct ahd_devinfo devinfo; 2560 unsigned int ppr_options = tinfo->goal.ppr_options 2561 & ~MSG_EXT_PPR_IU_REQ; 2562 unsigned int period = tinfo->goal.period; 2563 unsigned int dt; 2564 unsigned long flags; 2565 2566#ifdef AHD_DEBUG 2567 if ((ahd_debug & AHD_SHOW_DV) != 0) 2568 printk("%s: %s IU\n", ahd_name(ahd), 2569 iu ? "enabling" : "disabling"); 2570#endif 2571 2572 if (iu && spi_max_width(starget)) { 2573 ppr_options |= MSG_EXT_PPR_IU_REQ; 2574 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2575 } 2576 2577 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2578 2579 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2580 starget->channel + 'A', ROLE_INITIATOR); 2581 ahd_find_syncrate(ahd, &period, &ppr_options, 2582 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2583 2584 ahd_lock(ahd, &flags); 2585 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2586 ppr_options, AHD_TRANS_GOAL, FALSE); 2587 ahd_unlock(ahd, &flags); 2588} 2589 2590static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2591{ 2592 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2593 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2594 struct ahd_tmode_tstate *tstate; 2595 struct ahd_initiator_tinfo *tinfo 2596 = ahd_fetch_transinfo(ahd, 2597 starget->channel + 'A', 2598 shost->this_id, starget->id, &tstate); 2599 struct ahd_devinfo devinfo; 2600 unsigned int ppr_options = tinfo->goal.ppr_options 2601 & ~MSG_EXT_PPR_RD_STRM; 2602 unsigned int period = tinfo->goal.period; 2603 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2604 unsigned long flags; 2605 2606#ifdef AHD_DEBUG 2607 if ((ahd_debug & AHD_SHOW_DV) != 0) 2608 printk("%s: %s Read Streaming\n", ahd_name(ahd), 2609 rdstrm ? "enabling" : "disabling"); 2610#endif 2611 2612 if (rdstrm && spi_max_width(starget)) 2613 ppr_options |= MSG_EXT_PPR_RD_STRM; 2614 2615 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2616 starget->channel + 'A', ROLE_INITIATOR); 2617 ahd_find_syncrate(ahd, &period, &ppr_options, 2618 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2619 2620 ahd_lock(ahd, &flags); 2621 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2622 ppr_options, AHD_TRANS_GOAL, FALSE); 2623 ahd_unlock(ahd, &flags); 2624} 2625 2626static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2627{ 2628 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2629 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2630 struct ahd_tmode_tstate *tstate; 2631 struct ahd_initiator_tinfo *tinfo 2632 = ahd_fetch_transinfo(ahd, 2633 starget->channel + 'A', 2634 shost->this_id, starget->id, &tstate); 2635 struct ahd_devinfo devinfo; 2636 unsigned int ppr_options = tinfo->goal.ppr_options 2637 & ~MSG_EXT_PPR_WR_FLOW; 2638 unsigned int period = tinfo->goal.period; 2639 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2640 unsigned long flags; 2641 2642#ifdef AHD_DEBUG 2643 if ((ahd_debug & AHD_SHOW_DV) != 0) 2644 printk("%s: %s Write Flow Control\n", ahd_name(ahd), 2645 wrflow ? "enabling" : "disabling"); 2646#endif 2647 2648 if (wrflow && spi_max_width(starget)) 2649 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2650 2651 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2652 starget->channel + 'A', ROLE_INITIATOR); 2653 ahd_find_syncrate(ahd, &period, &ppr_options, 2654 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2655 2656 ahd_lock(ahd, &flags); 2657 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2658 ppr_options, AHD_TRANS_GOAL, FALSE); 2659 ahd_unlock(ahd, &flags); 2660} 2661 2662static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2663{ 2664 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2665 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2666 struct ahd_tmode_tstate *tstate; 2667 struct ahd_initiator_tinfo *tinfo 2668 = ahd_fetch_transinfo(ahd, 2669 starget->channel + 'A', 2670 shost->this_id, starget->id, &tstate); 2671 struct ahd_devinfo devinfo; 2672 unsigned int ppr_options = tinfo->goal.ppr_options 2673 & ~MSG_EXT_PPR_RTI; 2674 unsigned int period = tinfo->goal.period; 2675 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2676 unsigned long flags; 2677 2678 if ((ahd->features & AHD_RTI) == 0) { 2679#ifdef AHD_DEBUG 2680 if ((ahd_debug & AHD_SHOW_DV) != 0) 2681 printk("%s: RTI not available\n", ahd_name(ahd)); 2682#endif 2683 return; 2684 } 2685 2686#ifdef AHD_DEBUG 2687 if ((ahd_debug & AHD_SHOW_DV) != 0) 2688 printk("%s: %s RTI\n", ahd_name(ahd), 2689 rti ? "enabling" : "disabling"); 2690#endif 2691 2692 if (rti && spi_max_width(starget)) 2693 ppr_options |= MSG_EXT_PPR_RTI; 2694 2695 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2696 starget->channel + 'A', ROLE_INITIATOR); 2697 ahd_find_syncrate(ahd, &period, &ppr_options, 2698 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2699 2700 ahd_lock(ahd, &flags); 2701 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2702 ppr_options, AHD_TRANS_GOAL, FALSE); 2703 ahd_unlock(ahd, &flags); 2704} 2705 2706static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2707{ 2708 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2709 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2710 struct ahd_tmode_tstate *tstate; 2711 struct ahd_initiator_tinfo *tinfo 2712 = ahd_fetch_transinfo(ahd, 2713 starget->channel + 'A', 2714 shost->this_id, starget->id, &tstate); 2715 struct ahd_devinfo devinfo; 2716 unsigned int ppr_options = tinfo->goal.ppr_options 2717 & ~MSG_EXT_PPR_PCOMP_EN; 2718 unsigned int period = tinfo->goal.period; 2719 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2720 unsigned long flags; 2721 2722#ifdef AHD_DEBUG 2723 if ((ahd_debug & AHD_SHOW_DV) != 0) 2724 printk("%s: %s Precompensation\n", ahd_name(ahd), 2725 pcomp ? "Enable" : "Disable"); 2726#endif 2727 2728 if (pcomp && spi_max_width(starget)) { 2729 uint8_t precomp; 2730 2731 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 2732 const struct ahd_linux_iocell_opts *iocell_opts; 2733 2734 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2735 precomp = iocell_opts->precomp; 2736 } else { 2737 precomp = AIC79XX_DEFAULT_PRECOMP; 2738 } 2739 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2740 AHD_SET_PRECOMP(ahd, precomp); 2741 } else { 2742 AHD_SET_PRECOMP(ahd, 0); 2743 } 2744 2745 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2746 starget->channel + 'A', ROLE_INITIATOR); 2747 ahd_find_syncrate(ahd, &period, &ppr_options, 2748 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2749 2750 ahd_lock(ahd, &flags); 2751 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2752 ppr_options, AHD_TRANS_GOAL, FALSE); 2753 ahd_unlock(ahd, &flags); 2754} 2755 2756static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2757{ 2758 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2759 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2760 struct ahd_tmode_tstate *tstate; 2761 struct ahd_initiator_tinfo *tinfo 2762 = ahd_fetch_transinfo(ahd, 2763 starget->channel + 'A', 2764 shost->this_id, starget->id, &tstate); 2765 struct ahd_devinfo devinfo; 2766 unsigned int ppr_options = tinfo->goal.ppr_options 2767 & ~MSG_EXT_PPR_HOLD_MCS; 2768 unsigned int period = tinfo->goal.period; 2769 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2770 unsigned long flags; 2771 2772 if (hold && spi_max_width(starget)) 2773 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2774 2775 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2776 starget->channel + 'A', ROLE_INITIATOR); 2777 ahd_find_syncrate(ahd, &period, &ppr_options, 2778 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2779 2780 ahd_lock(ahd, &flags); 2781 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2782 ppr_options, AHD_TRANS_GOAL, FALSE); 2783 ahd_unlock(ahd, &flags); 2784} 2785 2786static void ahd_linux_get_signalling(struct Scsi_Host *shost) 2787{ 2788 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; 2789 unsigned long flags; 2790 u8 mode; 2791 2792 ahd_lock(ahd, &flags); 2793 ahd_pause(ahd); 2794 mode = ahd_inb(ahd, SBLKCTL); 2795 ahd_unpause(ahd); 2796 ahd_unlock(ahd, &flags); 2797 2798 if (mode & ENAB40) 2799 spi_signalling(shost) = SPI_SIGNAL_LVD; 2800 else if (mode & ENAB20) 2801 spi_signalling(shost) = SPI_SIGNAL_SE; 2802 else 2803 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2804} 2805 2806static struct spi_function_template ahd_linux_transport_functions = { 2807 .set_offset = ahd_linux_set_offset, 2808 .show_offset = 1, 2809 .set_period = ahd_linux_set_period, 2810 .show_period = 1, 2811 .set_width = ahd_linux_set_width, 2812 .show_width = 1, 2813 .set_dt = ahd_linux_set_dt, 2814 .show_dt = 1, 2815 .set_iu = ahd_linux_set_iu, 2816 .show_iu = 1, 2817 .set_qas = ahd_linux_set_qas, 2818 .show_qas = 1, 2819 .set_rd_strm = ahd_linux_set_rd_strm, 2820 .show_rd_strm = 1, 2821 .set_wr_flow = ahd_linux_set_wr_flow, 2822 .show_wr_flow = 1, 2823 .set_rti = ahd_linux_set_rti, 2824 .show_rti = 1, 2825 .set_pcomp_en = ahd_linux_set_pcomp_en, 2826 .show_pcomp_en = 1, 2827 .set_hold_mcs = ahd_linux_set_hold_mcs, 2828 .show_hold_mcs = 1, 2829 .get_signalling = ahd_linux_get_signalling, 2830}; 2831 2832static int __init 2833ahd_linux_init(void) 2834{ 2835 int error = 0; 2836 2837 /* 2838 * If we've been passed any parameters, process them now. 2839 */ 2840 if (aic79xx) 2841 aic79xx_setup(aic79xx); 2842 2843 ahd_linux_transport_template = 2844 spi_attach_transport(&ahd_linux_transport_functions); 2845 if (!ahd_linux_transport_template) 2846 return -ENODEV; 2847 2848 scsi_transport_reserve_device(ahd_linux_transport_template, 2849 sizeof(struct ahd_linux_device)); 2850 2851 error = ahd_linux_pci_init(); 2852 if (error) 2853 spi_release_transport(ahd_linux_transport_template); 2854 return error; 2855} 2856 2857static void __exit 2858ahd_linux_exit(void) 2859{ 2860 ahd_linux_pci_exit(); 2861 spi_release_transport(ahd_linux_transport_template); 2862} 2863 2864module_init(ahd_linux_init); 2865module_exit(ahd_linux_exit);
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