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 49 static struct scsi_transport_template *ahd_linux_transport_template = NULL; 50 51 #include <linux/init.h> /* __setup */ 52 #include <linux/mm.h> /* For fetching system memory size */ 53 #include <linux/blkdev.h> /* For block_size() */ 54 #include <linux/delay.h> /* For ssleep/msleep */ 55 #include <linux/device.h> 56 57 /* 58 * Bucket size for counting good commands in between bad ones. 59 */ 60 #define AHD_LINUX_ERR_THRESH 1000 61 62 /* 63 * Set this to the delay in seconds after SCSI bus reset. 64 * Note, we honor this only for the initial bus reset. 65 * The scsi error recovery code performs its own bus settle 66 * delay handling for error recovery actions. 67 */ 68 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS 69 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS 70 #else 71 #define AIC79XX_RESET_DELAY 5000 72 #endif 73 74 /* 75 * To change the default number of tagged transactions allowed per-device, 76 * add a line to the lilo.conf file like: 77 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 78 * which will result in the first four devices on the first two 79 * controllers being set to a tagged queue depth of 32. 80 * 81 * The tag_commands is an array of 16 to allow for wide and twin adapters. 82 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 83 * for channel 1. 84 */ 85 typedef struct { 86 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */ 87 } adapter_tag_info_t; 88 89 /* 90 * Modify this as you see fit for your system. 91 * 92 * 0 tagged queuing disabled 93 * 1 <= n <= 253 n == max tags ever dispatched. 94 * 95 * The driver will throttle the number of commands dispatched to a 96 * device if it returns queue full. For devices with a fixed maximum 97 * queue depth, the driver will eventually determine this depth and 98 * lock it in (a console message is printed to indicate that a lock 99 * has occurred). On some devices, queue full is returned for a temporary 100 * resource shortage. These devices will return queue full at varying 101 * depths. The driver will throttle back when the queue fulls occur and 102 * attempt to slowly increase the depth over time as the device recovers 103 * from the resource shortage. 104 * 105 * In this example, the first line will disable tagged queueing for all 106 * the devices on the first probed aic79xx adapter. 107 * 108 * The second line enables tagged queueing with 4 commands/LUN for IDs 109 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 110 * driver to attempt to use up to 64 tags for ID 1. 111 * 112 * The third line is the same as the first line. 113 * 114 * The fourth line disables tagged queueing for devices 0 and 3. It 115 * enables tagged queueing for the other IDs, with 16 commands/LUN 116 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 117 * IDs 2, 5-7, and 9-15. 118 */ 119 120 /* 121 * NOTE: The below structure is for reference only, the actual structure 122 * to modify in order to change things is just below this comment block. 123 adapter_tag_info_t aic79xx_tag_info[] = 124 { 125 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 126 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 127 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 128 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 129 }; 130 */ 131 132 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE 133 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE 134 #else 135 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE 136 #endif 137 138 #define AIC79XX_CONFIGED_TAG_COMMANDS { \ 139 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 140 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 141 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 142 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 143 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 144 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 145 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \ 147 } 148 149 /* 150 * By default, use the number of commands specified by 151 * the users kernel configuration. 152 */ 153 static adapter_tag_info_t aic79xx_tag_info[] = 154 { 155 {AIC79XX_CONFIGED_TAG_COMMANDS}, 156 {AIC79XX_CONFIGED_TAG_COMMANDS}, 157 {AIC79XX_CONFIGED_TAG_COMMANDS}, 158 {AIC79XX_CONFIGED_TAG_COMMANDS}, 159 {AIC79XX_CONFIGED_TAG_COMMANDS}, 160 {AIC79XX_CONFIGED_TAG_COMMANDS}, 161 {AIC79XX_CONFIGED_TAG_COMMANDS}, 162 {AIC79XX_CONFIGED_TAG_COMMANDS}, 163 {AIC79XX_CONFIGED_TAG_COMMANDS}, 164 {AIC79XX_CONFIGED_TAG_COMMANDS}, 165 {AIC79XX_CONFIGED_TAG_COMMANDS}, 166 {AIC79XX_CONFIGED_TAG_COMMANDS}, 167 {AIC79XX_CONFIGED_TAG_COMMANDS}, 168 {AIC79XX_CONFIGED_TAG_COMMANDS}, 169 {AIC79XX_CONFIGED_TAG_COMMANDS}, 170 {AIC79XX_CONFIGED_TAG_COMMANDS} 171 }; 172 173 /* 174 * The I/O cell on the chip is very configurable in respect to its analog 175 * characteristics. Set the defaults here; they can be overriden with 176 * the proper insmod parameters. 177 */ 178 struct ahd_linux_iocell_opts 179 { 180 uint8_t precomp; 181 uint8_t slewrate; 182 uint8_t amplitude; 183 }; 184 #define AIC79XX_DEFAULT_PRECOMP 0xFF 185 #define AIC79XX_DEFAULT_SLEWRATE 0xFF 186 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF 187 #define AIC79XX_DEFAULT_IOOPTS \ 188 { \ 189 AIC79XX_DEFAULT_PRECOMP, \ 190 AIC79XX_DEFAULT_SLEWRATE, \ 191 AIC79XX_DEFAULT_AMPLITUDE \ 192 } 193 #define AIC79XX_PRECOMP_INDEX 0 194 #define AIC79XX_SLEWRATE_INDEX 1 195 #define AIC79XX_AMPLITUDE_INDEX 2 196 static struct ahd_linux_iocell_opts aic79xx_iocell_info[] = 197 { 198 AIC79XX_DEFAULT_IOOPTS, 199 AIC79XX_DEFAULT_IOOPTS, 200 AIC79XX_DEFAULT_IOOPTS, 201 AIC79XX_DEFAULT_IOOPTS, 202 AIC79XX_DEFAULT_IOOPTS, 203 AIC79XX_DEFAULT_IOOPTS, 204 AIC79XX_DEFAULT_IOOPTS, 205 AIC79XX_DEFAULT_IOOPTS, 206 AIC79XX_DEFAULT_IOOPTS, 207 AIC79XX_DEFAULT_IOOPTS, 208 AIC79XX_DEFAULT_IOOPTS, 209 AIC79XX_DEFAULT_IOOPTS, 210 AIC79XX_DEFAULT_IOOPTS, 211 AIC79XX_DEFAULT_IOOPTS, 212 AIC79XX_DEFAULT_IOOPTS, 213 AIC79XX_DEFAULT_IOOPTS 214 }; 215 216 /* 217 * There should be a specific return value for this in scsi.h, but 218 * it seems that most drivers ignore it. 219 */ 220 #define DID_UNDERFLOW DID_ERROR 221 222 void 223 ahd_print_path(struct ahd_softc *ahd, struct scb *scb) 224 { 225 printk("(scsi%d:%c:%d:%d): ", 226 ahd->platform_data->host->host_no, 227 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X', 228 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1, 229 scb != NULL ? SCB_GET_LUN(scb) : -1); 230 } 231 232 /* 233 * XXX - these options apply unilaterally to _all_ adapters 234 * cards in the system. This should be fixed. Exceptions to this 235 * rule are noted in the comments. 236 */ 237 238 /* 239 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 240 * has no effect on any later resets that might occur due to things like 241 * SCSI bus timeouts. 242 */ 243 static uint32_t aic79xx_no_reset; 244 245 /* 246 * Should we force EXTENDED translation on a controller. 247 * 0 == Use whatever is in the SEEPROM or default to off 248 * 1 == Use whatever is in the SEEPROM or default to on 249 */ 250 static uint32_t aic79xx_extended; 251 252 /* 253 * PCI bus parity checking of the Adaptec controllers. This is somewhat 254 * dubious at best. To my knowledge, this option has never actually 255 * solved a PCI parity problem, but on certain machines with broken PCI 256 * chipset configurations, it can generate tons of false error messages. 257 * It's included in the driver for completeness. 258 * 0 = Shut off PCI parity check 259 * non-0 = Enable PCI parity check 260 * 261 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this 262 * variable to -1 you would actually want to simply pass the variable 263 * name without a number. That will invert the 0 which will result in 264 * -1. 265 */ 266 static uint32_t aic79xx_pci_parity = ~0; 267 268 /* 269 * There are lots of broken chipsets in the world. Some of them will 270 * violate the PCI spec when we issue byte sized memory writes to our 271 * controller. I/O mapped register access, if allowed by the given 272 * platform, will work in almost all cases. 273 */ 274 uint32_t aic79xx_allow_memio = ~0; 275 276 /* 277 * So that we can set how long each device is given as a selection timeout. 278 * The table of values goes like this: 279 * 0 - 256ms 280 * 1 - 128ms 281 * 2 - 64ms 282 * 3 - 32ms 283 * We default to 256ms because some older devices need a longer time 284 * to respond to initial selection. 285 */ 286 static uint32_t aic79xx_seltime; 287 288 /* 289 * Certain devices do not perform any aging on commands. Should the 290 * device be saturated by commands in one portion of the disk, it is 291 * possible for transactions on far away sectors to never be serviced. 292 * To handle these devices, we can periodically send an ordered tag to 293 * force all outstanding transactions to be serviced prior to a new 294 * transaction. 295 */ 296 static uint32_t aic79xx_periodic_otag; 297 298 /* Some storage boxes are using an LSI chip which has a bug making it 299 * impossible to use aic79xx Rev B chip in 320 speeds. The following 300 * storage boxes have been reported to be buggy: 301 * EonStor 3U 16-Bay: U16U-G3A3 302 * EonStor 2U 12-Bay: U12U-G3A3 303 * SentinelRAID: 2500F R5 / R6 304 * SentinelRAID: 2500F R1 305 * SentinelRAID: 2500F/1500F 306 * SentinelRAID: 150F 307 * 308 * To get around this LSI bug, you can set your board to 160 mode 309 * or you can enable the SLOWCRC bit. 310 */ 311 uint32_t aic79xx_slowcrc; 312 313 /* 314 * Module information and settable options. 315 */ 316 static char *aic79xx = NULL; 317 318 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); 319 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver"); 320 MODULE_LICENSE("Dual BSD/GPL"); 321 MODULE_VERSION(AIC79XX_DRIVER_VERSION); 322 module_param(aic79xx, charp, 0444); 323 MODULE_PARM_DESC(aic79xx, 324 "period-delimited options string:\n" 325 " verbose Enable verbose/diagnostic logging\n" 326 " allow_memio Allow device registers to be memory mapped\n" 327 " debug Bitmask of debug values to enable\n" 328 " no_reset Suppress initial bus resets\n" 329 " extended Enable extended geometry on all controllers\n" 330 " periodic_otag Send an ordered tagged transaction\n" 331 " periodically to prevent tag starvation.\n" 332 " This may be required by some older disk\n" 333 " or drives/RAID arrays.\n" 334 " tag_info:<tag_str> Set per-target tag depth\n" 335 " global_tag_depth:<int> Global tag depth for all targets on all buses\n" 336 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" 337 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n" 338 " amplitude:<int> Set the signal amplitude (0-7).\n" 339 " seltime:<int> Selection Timeout:\n" 340 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 341 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n" 342 "\n" 343 " Sample /etc/modprobe.conf line:\n" 344 " Enable verbose logging\n" 345 " Set tag depth on Controller 2/Target 2 to 10 tags\n" 346 " Shorten the selection timeout to 128ms\n" 347 "\n" 348 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" 349 ); 350 351 static void ahd_linux_handle_scsi_status(struct ahd_softc *, 352 struct scsi_device *, 353 struct scb *); 354 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, 355 struct scsi_cmnd *cmd); 356 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd); 357 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); 358 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, 359 struct ahd_devinfo *devinfo); 360 static void ahd_linux_device_queue_depth(struct scsi_device *); 361 static int ahd_linux_run_command(struct ahd_softc*, 362 struct ahd_linux_device *, 363 struct scsi_cmnd *); 364 static void ahd_linux_setup_tag_info_global(char *p); 365 static int aic79xx_setup(char *c); 366 static void ahd_freeze_simq(struct ahd_softc *ahd); 367 static void ahd_release_simq(struct ahd_softc *ahd); 368 369 static int ahd_linux_unit; 370 371 372 /****************************** Inlines ***************************************/ 373 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); 374 375 static __inline void 376 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) 377 { 378 struct scsi_cmnd *cmd; 379 380 cmd = scb->io_ctx; 381 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); 382 scsi_dma_unmap(cmd); 383 } 384 385 /******************************** Macros **************************************/ 386 #define BUILD_SCSIID(ahd, cmd) \ 387 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id) 388 389 /* 390 * Return a string describing the driver. 391 */ 392 static const char * 393 ahd_linux_info(struct Scsi_Host *host) 394 { 395 static char buffer[512]; 396 char ahd_info[256]; 397 char *bp; 398 struct ahd_softc *ahd; 399 400 bp = &buffer[0]; 401 ahd = *(struct ahd_softc **)host->hostdata; 402 memset(bp, 0, sizeof(buffer)); 403 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev "); 404 strcat(bp, AIC79XX_DRIVER_VERSION); 405 strcat(bp, "\n"); 406 strcat(bp, " <"); 407 strcat(bp, ahd->description); 408 strcat(bp, ">\n"); 409 strcat(bp, " "); 410 ahd_controller_info(ahd, ahd_info); 411 strcat(bp, ahd_info); 412 413 return (bp); 414 } 415 416 /* 417 * Queue an SCB to the controller. 418 */ 419 static int 420 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 421 { 422 struct ahd_softc *ahd; 423 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device); 424 int rtn = SCSI_MLQUEUE_HOST_BUSY; 425 426 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 427 428 cmd->scsi_done = scsi_done; 429 cmd->result = CAM_REQ_INPROG << 16; 430 rtn = ahd_linux_run_command(ahd, dev, cmd); 431 432 return rtn; 433 } 434 435 static inline struct scsi_target ** 436 ahd_linux_target_in_softc(struct scsi_target *starget) 437 { 438 struct ahd_softc *ahd = 439 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 440 unsigned int target_offset; 441 442 target_offset = starget->id; 443 if (starget->channel != 0) 444 target_offset += 8; 445 446 return &ahd->platform_data->starget[target_offset]; 447 } 448 449 static int 450 ahd_linux_target_alloc(struct scsi_target *starget) 451 { 452 struct ahd_softc *ahd = 453 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 454 struct seeprom_config *sc = ahd->seep_config; 455 unsigned long flags; 456 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 457 struct ahd_devinfo devinfo; 458 struct ahd_initiator_tinfo *tinfo; 459 struct ahd_tmode_tstate *tstate; 460 char channel = starget->channel + 'A'; 461 462 ahd_lock(ahd, &flags); 463 464 BUG_ON(*ahd_targp != NULL); 465 466 *ahd_targp = starget; 467 468 if (sc) { 469 int flags = sc->device_flags[starget->id]; 470 471 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 472 starget->id, &tstate); 473 474 if ((flags & CFPACKETIZED) == 0) { 475 /* Do not negotiate packetized transfers */ 476 spi_rd_strm(starget) = 0; 477 spi_pcomp_en(starget) = 0; 478 spi_rti(starget) = 0; 479 spi_wr_flow(starget) = 0; 480 spi_hold_mcs(starget) = 0; 481 } else { 482 if ((ahd->features & AHD_RTI) == 0) 483 spi_rti(starget) = 0; 484 } 485 486 if ((flags & CFQAS) == 0) 487 spi_qas(starget) = 0; 488 489 /* Transinfo values have been set to BIOS settings */ 490 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 491 spi_min_period(starget) = tinfo->user.period; 492 spi_max_offset(starget) = tinfo->user.offset; 493 } 494 495 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 496 starget->id, &tstate); 497 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id, 498 CAM_LUN_WILDCARD, channel, 499 ROLE_INITIATOR); 500 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, 501 AHD_TRANS_GOAL, /*paused*/FALSE); 502 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 503 AHD_TRANS_GOAL, /*paused*/FALSE); 504 ahd_unlock(ahd, &flags); 505 506 return 0; 507 } 508 509 static void 510 ahd_linux_target_destroy(struct scsi_target *starget) 511 { 512 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 513 514 *ahd_targp = NULL; 515 } 516 517 static int 518 ahd_linux_slave_alloc(struct scsi_device *sdev) 519 { 520 struct ahd_softc *ahd = 521 *((struct ahd_softc **)sdev->host->hostdata); 522 struct ahd_linux_device *dev; 523 524 if (bootverbose) 525 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id); 526 527 dev = scsi_transport_device_data(sdev); 528 memset(dev, 0, sizeof(*dev)); 529 530 /* 531 * We start out life using untagged 532 * transactions of which we allow one. 533 */ 534 dev->openings = 1; 535 536 /* 537 * Set maxtags to 0. This will be changed if we 538 * later determine that we are dealing with 539 * a tagged queuing capable device. 540 */ 541 dev->maxtags = 0; 542 543 return (0); 544 } 545 546 static int 547 ahd_linux_slave_configure(struct scsi_device *sdev) 548 { 549 struct ahd_softc *ahd; 550 551 ahd = *((struct ahd_softc **)sdev->host->hostdata); 552 if (bootverbose) 553 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 554 555 ahd_linux_device_queue_depth(sdev); 556 557 /* Initial Domain Validation */ 558 if (!spi_initial_dv(sdev->sdev_target)) 559 spi_dv_device(sdev); 560 561 return 0; 562 } 563 564 #if defined(__i386__) 565 /* 566 * Return the disk geometry for the given SCSI device. 567 */ 568 static int 569 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 570 sector_t capacity, int geom[]) 571 { 572 uint8_t *bh; 573 int heads; 574 int sectors; 575 int cylinders; 576 int ret; 577 int extended; 578 struct ahd_softc *ahd; 579 580 ahd = *((struct ahd_softc **)sdev->host->hostdata); 581 582 bh = scsi_bios_ptable(bdev); 583 if (bh) { 584 ret = scsi_partsize(bh, capacity, 585 &geom[2], &geom[0], &geom[1]); 586 kfree(bh); 587 if (ret != -1) 588 return (ret); 589 } 590 heads = 64; 591 sectors = 32; 592 cylinders = aic_sector_div(capacity, heads, sectors); 593 594 if (aic79xx_extended != 0) 595 extended = 1; 596 else 597 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 598 if (extended && cylinders >= 1024) { 599 heads = 255; 600 sectors = 63; 601 cylinders = aic_sector_div(capacity, heads, sectors); 602 } 603 geom[0] = heads; 604 geom[1] = sectors; 605 geom[2] = cylinders; 606 return (0); 607 } 608 #endif 609 610 /* 611 * Abort the current SCSI command(s). 612 */ 613 static int 614 ahd_linux_abort(struct scsi_cmnd *cmd) 615 { 616 int error; 617 618 error = ahd_linux_queue_abort_cmd(cmd); 619 620 return error; 621 } 622 623 /* 624 * Attempt to send a target reset message to the device that timed out. 625 */ 626 static int 627 ahd_linux_dev_reset(struct scsi_cmnd *cmd) 628 { 629 struct ahd_softc *ahd; 630 struct ahd_linux_device *dev; 631 struct scb *reset_scb; 632 u_int cdb_byte; 633 int retval = SUCCESS; 634 int paused; 635 int wait; 636 struct ahd_initiator_tinfo *tinfo; 637 struct ahd_tmode_tstate *tstate; 638 unsigned long flags; 639 DECLARE_COMPLETION_ONSTACK(done); 640 641 reset_scb = NULL; 642 paused = FALSE; 643 wait = FALSE; 644 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 645 646 scmd_printk(KERN_INFO, cmd, 647 "Attempting to queue a TARGET RESET message:"); 648 649 printf("CDB:"); 650 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 651 printf(" 0x%x", cmd->cmnd[cdb_byte]); 652 printf("\n"); 653 654 /* 655 * Determine if we currently own this command. 656 */ 657 dev = scsi_transport_device_data(cmd->device); 658 659 if (dev == NULL) { 660 /* 661 * No target device for this command exists, 662 * so we must not still own the command. 663 */ 664 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 665 return SUCCESS; 666 } 667 668 /* 669 * Generate us a new SCB 670 */ 671 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); 672 if (!reset_scb) { 673 scmd_printk(KERN_INFO, cmd, "No SCB available\n"); 674 return FAILED; 675 } 676 677 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 678 cmd->device->id, &tstate); 679 reset_scb->io_ctx = cmd; 680 reset_scb->platform_data->dev = dev; 681 reset_scb->sg_count = 0; 682 ahd_set_residual(reset_scb, 0); 683 ahd_set_sense_residual(reset_scb, 0); 684 reset_scb->platform_data->xfer_len = 0; 685 reset_scb->hscb->control = 0; 686 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd); 687 reset_scb->hscb->lun = cmd->device->lun; 688 reset_scb->hscb->cdb_len = 0; 689 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; 690 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; 691 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 692 reset_scb->flags |= SCB_PACKETIZED; 693 } else { 694 reset_scb->hscb->control |= MK_MESSAGE; 695 } 696 dev->openings--; 697 dev->active++; 698 dev->commands_issued++; 699 700 ahd_lock(ahd, &flags); 701 702 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); 703 ahd_queue_scb(ahd, reset_scb); 704 705 ahd->platform_data->eh_done = &done; 706 ahd_unlock(ahd, &flags); 707 708 printf("%s: Device reset code sleeping\n", ahd_name(ahd)); 709 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 710 ahd_lock(ahd, &flags); 711 ahd->platform_data->eh_done = NULL; 712 ahd_unlock(ahd, &flags); 713 printf("%s: Device reset timer expired (active %d)\n", 714 ahd_name(ahd), dev->active); 715 retval = FAILED; 716 } 717 printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); 718 719 return (retval); 720 } 721 722 /* 723 * Reset the SCSI bus. 724 */ 725 static int 726 ahd_linux_bus_reset(struct scsi_cmnd *cmd) 727 { 728 struct ahd_softc *ahd; 729 int found; 730 unsigned long flags; 731 732 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 733 #ifdef AHD_DEBUG 734 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 735 printf("%s: Bus reset called for cmd %p\n", 736 ahd_name(ahd), cmd); 737 #endif 738 ahd_lock(ahd, &flags); 739 740 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 741 /*initiate reset*/TRUE); 742 ahd_unlock(ahd, &flags); 743 744 if (bootverbose) 745 printf("%s: SCSI bus reset delivered. " 746 "%d SCBs aborted.\n", ahd_name(ahd), found); 747 748 return (SUCCESS); 749 } 750 751 struct scsi_host_template aic79xx_driver_template = { 752 .module = THIS_MODULE, 753 .name = "aic79xx", 754 .proc_name = "aic79xx", 755 .proc_info = ahd_linux_proc_info, 756 .info = ahd_linux_info, 757 .queuecommand = ahd_linux_queue, 758 .eh_abort_handler = ahd_linux_abort, 759 .eh_device_reset_handler = ahd_linux_dev_reset, 760 .eh_bus_reset_handler = ahd_linux_bus_reset, 761 #if defined(__i386__) 762 .bios_param = ahd_linux_biosparam, 763 #endif 764 .can_queue = AHD_MAX_QUEUE, 765 .this_id = -1, 766 .max_sectors = 8192, 767 .cmd_per_lun = 2, 768 .use_clustering = ENABLE_CLUSTERING, 769 .slave_alloc = ahd_linux_slave_alloc, 770 .slave_configure = ahd_linux_slave_configure, 771 .target_alloc = ahd_linux_target_alloc, 772 .target_destroy = ahd_linux_target_destroy, 773 }; 774 775 /******************************** Bus DMA *************************************/ 776 int 777 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 778 bus_size_t alignment, bus_size_t boundary, 779 dma_addr_t lowaddr, dma_addr_t highaddr, 780 bus_dma_filter_t *filter, void *filterarg, 781 bus_size_t maxsize, int nsegments, 782 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 783 { 784 bus_dma_tag_t dmat; 785 786 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); 787 if (dmat == NULL) 788 return (ENOMEM); 789 790 /* 791 * Linux is very simplistic about DMA memory. For now don't 792 * maintain all specification information. Once Linux supplies 793 * better facilities for doing these operations, or the 794 * needs of this particular driver change, we might need to do 795 * more here. 796 */ 797 dmat->alignment = alignment; 798 dmat->boundary = boundary; 799 dmat->maxsize = maxsize; 800 *ret_tag = dmat; 801 return (0); 802 } 803 804 void 805 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 806 { 807 free(dmat, M_DEVBUF); 808 } 809 810 int 811 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 812 int flags, bus_dmamap_t *mapp) 813 { 814 *vaddr = pci_alloc_consistent(ahd->dev_softc, 815 dmat->maxsize, mapp); 816 if (*vaddr == NULL) 817 return (ENOMEM); 818 return(0); 819 } 820 821 void 822 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 823 void* vaddr, bus_dmamap_t map) 824 { 825 pci_free_consistent(ahd->dev_softc, dmat->maxsize, 826 vaddr, map); 827 } 828 829 int 830 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 831 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 832 void *cb_arg, int flags) 833 { 834 /* 835 * Assume for now that this will only be used during 836 * initialization and not for per-transaction buffer mapping. 837 */ 838 bus_dma_segment_t stack_sg; 839 840 stack_sg.ds_addr = map; 841 stack_sg.ds_len = dmat->maxsize; 842 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 843 return (0); 844 } 845 846 void 847 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 848 { 849 } 850 851 int 852 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 853 { 854 /* Nothing to do */ 855 return (0); 856 } 857 858 /********************* Platform Dependent Functions ***************************/ 859 static void 860 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 861 { 862 863 if ((instance >= 0) 864 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { 865 uint8_t *iocell_info; 866 867 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 868 iocell_info[index] = value & 0xFFFF; 869 if (bootverbose) 870 printf("iocell[%d:%ld] = %d\n", instance, index, value); 871 } 872 } 873 874 static void 875 ahd_linux_setup_tag_info_global(char *p) 876 { 877 int tags, i, j; 878 879 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 880 printf("Setting Global Tags= %d\n", tags); 881 882 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { 883 for (j = 0; j < AHD_NUM_TARGETS; j++) { 884 aic79xx_tag_info[i].tag_commands[j] = tags; 885 } 886 } 887 } 888 889 static void 890 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 891 { 892 893 if ((instance >= 0) && (targ >= 0) 894 && (instance < ARRAY_SIZE(aic79xx_tag_info)) 895 && (targ < AHD_NUM_TARGETS)) { 896 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 897 if (bootverbose) 898 printf("tag_info[%d:%d] = %d\n", instance, targ, value); 899 } 900 } 901 902 static char * 903 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 904 void (*callback)(u_long, int, int, int32_t), 905 u_long callback_arg) 906 { 907 char *tok_end; 908 char *tok_end2; 909 int i; 910 int instance; 911 int targ; 912 int done; 913 char tok_list[] = {'.', ',', '{', '}', '\0'}; 914 915 /* All options use a ':' name/arg separator */ 916 if (*opt_arg != ':') 917 return (opt_arg); 918 opt_arg++; 919 instance = -1; 920 targ = -1; 921 done = FALSE; 922 /* 923 * Restore separator that may be in 924 * the middle of our option argument. 925 */ 926 tok_end = strchr(opt_arg, '\0'); 927 if (tok_end < end) 928 *tok_end = ','; 929 while (!done) { 930 switch (*opt_arg) { 931 case '{': 932 if (instance == -1) { 933 instance = 0; 934 } else { 935 if (depth > 1) { 936 if (targ == -1) 937 targ = 0; 938 } else { 939 printf("Malformed Option %s\n", 940 opt_name); 941 done = TRUE; 942 } 943 } 944 opt_arg++; 945 break; 946 case '}': 947 if (targ != -1) 948 targ = -1; 949 else if (instance != -1) 950 instance = -1; 951 opt_arg++; 952 break; 953 case ',': 954 case '.': 955 if (instance == -1) 956 done = TRUE; 957 else if (targ >= 0) 958 targ++; 959 else if (instance >= 0) 960 instance++; 961 opt_arg++; 962 break; 963 case '\0': 964 done = TRUE; 965 break; 966 default: 967 tok_end = end; 968 for (i = 0; tok_list[i]; i++) { 969 tok_end2 = strchr(opt_arg, tok_list[i]); 970 if ((tok_end2) && (tok_end2 < tok_end)) 971 tok_end = tok_end2; 972 } 973 callback(callback_arg, instance, targ, 974 simple_strtol(opt_arg, NULL, 0)); 975 opt_arg = tok_end; 976 break; 977 } 978 } 979 return (opt_arg); 980 } 981 982 /* 983 * Handle Linux boot parameters. This routine allows for assigning a value 984 * to a parameter with a ':' between the parameter and the value. 985 * ie. aic79xx=stpwlev:1,extended 986 */ 987 static int 988 aic79xx_setup(char *s) 989 { 990 int i, n; 991 char *p; 992 char *end; 993 994 static struct { 995 const char *name; 996 uint32_t *flag; 997 } options[] = { 998 { "extended", &aic79xx_extended }, 999 { "no_reset", &aic79xx_no_reset }, 1000 { "verbose", &aic79xx_verbose }, 1001 { "allow_memio", &aic79xx_allow_memio}, 1002 #ifdef AHD_DEBUG 1003 { "debug", &ahd_debug }, 1004 #endif 1005 { "periodic_otag", &aic79xx_periodic_otag }, 1006 { "pci_parity", &aic79xx_pci_parity }, 1007 { "seltime", &aic79xx_seltime }, 1008 { "tag_info", NULL }, 1009 { "global_tag_depth", NULL}, 1010 { "slewrate", NULL }, 1011 { "precomp", NULL }, 1012 { "amplitude", NULL }, 1013 { "slowcrc", &aic79xx_slowcrc }, 1014 }; 1015 1016 end = strchr(s, '\0'); 1017 1018 /* 1019 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1020 * will never be 0 in this case. 1021 */ 1022 n = 0; 1023 1024 while ((p = strsep(&s, ",.")) != NULL) { 1025 if (*p == '\0') 1026 continue; 1027 for (i = 0; i < ARRAY_SIZE(options); i++) { 1028 1029 n = strlen(options[i].name); 1030 if (strncmp(options[i].name, p, n) == 0) 1031 break; 1032 } 1033 if (i == ARRAY_SIZE(options)) 1034 continue; 1035 1036 if (strncmp(p, "global_tag_depth", n) == 0) { 1037 ahd_linux_setup_tag_info_global(p + n); 1038 } else if (strncmp(p, "tag_info", n) == 0) { 1039 s = ahd_parse_brace_option("tag_info", p + n, end, 1040 2, ahd_linux_setup_tag_info, 0); 1041 } else if (strncmp(p, "slewrate", n) == 0) { 1042 s = ahd_parse_brace_option("slewrate", 1043 p + n, end, 1, ahd_linux_setup_iocell_info, 1044 AIC79XX_SLEWRATE_INDEX); 1045 } else if (strncmp(p, "precomp", n) == 0) { 1046 s = ahd_parse_brace_option("precomp", 1047 p + n, end, 1, ahd_linux_setup_iocell_info, 1048 AIC79XX_PRECOMP_INDEX); 1049 } else if (strncmp(p, "amplitude", n) == 0) { 1050 s = ahd_parse_brace_option("amplitude", 1051 p + n, end, 1, ahd_linux_setup_iocell_info, 1052 AIC79XX_AMPLITUDE_INDEX); 1053 } else if (p[n] == ':') { 1054 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1055 } else if (!strncmp(p, "verbose", n)) { 1056 *(options[i].flag) = 1; 1057 } else { 1058 *(options[i].flag) ^= 0xFFFFFFFF; 1059 } 1060 } 1061 return 1; 1062 } 1063 1064 __setup("aic79xx=", aic79xx_setup); 1065 1066 uint32_t aic79xx_verbose; 1067 1068 int 1069 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1070 { 1071 char buf[80]; 1072 struct Scsi_Host *host; 1073 char *new_name; 1074 u_long s; 1075 int retval; 1076 1077 template->name = ahd->description; 1078 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1079 if (host == NULL) 1080 return (ENOMEM); 1081 1082 *((struct ahd_softc **)host->hostdata) = ahd; 1083 ahd->platform_data->host = host; 1084 host->can_queue = AHD_MAX_QUEUE; 1085 host->cmd_per_lun = 2; 1086 host->sg_tablesize = AHD_NSEG; 1087 host->this_id = ahd->our_id; 1088 host->irq = ahd->platform_data->irq; 1089 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1090 host->max_lun = AHD_NUM_LUNS; 1091 host->max_channel = 0; 1092 host->sg_tablesize = AHD_NSEG; 1093 ahd_lock(ahd, &s); 1094 ahd_set_unit(ahd, ahd_linux_unit++); 1095 ahd_unlock(ahd, &s); 1096 sprintf(buf, "scsi%d", host->host_no); 1097 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 1098 if (new_name != NULL) { 1099 strcpy(new_name, buf); 1100 ahd_set_name(ahd, new_name); 1101 } 1102 host->unique_id = ahd->unit; 1103 ahd_linux_initialize_scsi_bus(ahd); 1104 ahd_intr_enable(ahd, TRUE); 1105 1106 host->transportt = ahd_linux_transport_template; 1107 1108 retval = scsi_add_host(host, &ahd->dev_softc->dev); 1109 if (retval) { 1110 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); 1111 scsi_host_put(host); 1112 return retval; 1113 } 1114 1115 scsi_scan_host(host); 1116 return 0; 1117 } 1118 1119 /* 1120 * Place the SCSI bus into a known state by either resetting it, 1121 * or forcing transfer negotiations on the next command to any 1122 * target. 1123 */ 1124 static void 1125 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1126 { 1127 u_int target_id; 1128 u_int numtarg; 1129 unsigned long s; 1130 1131 target_id = 0; 1132 numtarg = 0; 1133 1134 if (aic79xx_no_reset != 0) 1135 ahd->flags &= ~AHD_RESET_BUS_A; 1136 1137 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1138 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1139 else 1140 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1141 1142 ahd_lock(ahd, &s); 1143 1144 /* 1145 * Force negotiation to async for all targets that 1146 * will not see an initial bus reset. 1147 */ 1148 for (; target_id < numtarg; target_id++) { 1149 struct ahd_devinfo devinfo; 1150 struct ahd_initiator_tinfo *tinfo; 1151 struct ahd_tmode_tstate *tstate; 1152 1153 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1154 target_id, &tstate); 1155 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1156 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1157 ahd_update_neg_request(ahd, &devinfo, tstate, 1158 tinfo, AHD_NEG_ALWAYS); 1159 } 1160 ahd_unlock(ahd, &s); 1161 /* Give the bus some time to recover */ 1162 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1163 ahd_freeze_simq(ahd); 1164 msleep(AIC79XX_RESET_DELAY); 1165 ahd_release_simq(ahd); 1166 } 1167 } 1168 1169 int 1170 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1171 { 1172 ahd->platform_data = 1173 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT); 1174 if (ahd->platform_data == NULL) 1175 return (ENOMEM); 1176 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data)); 1177 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1178 ahd_lockinit(ahd); 1179 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1180 return (0); 1181 } 1182 1183 void 1184 ahd_platform_free(struct ahd_softc *ahd) 1185 { 1186 struct scsi_target *starget; 1187 int i; 1188 1189 if (ahd->platform_data != NULL) { 1190 /* destroy all of the device and target objects */ 1191 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1192 starget = ahd->platform_data->starget[i]; 1193 if (starget != NULL) { 1194 ahd->platform_data->starget[i] = NULL; 1195 } 1196 } 1197 1198 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1199 free_irq(ahd->platform_data->irq, ahd); 1200 if (ahd->tags[0] == BUS_SPACE_PIO 1201 && ahd->bshs[0].ioport != 0) 1202 release_region(ahd->bshs[0].ioport, 256); 1203 if (ahd->tags[1] == BUS_SPACE_PIO 1204 && ahd->bshs[1].ioport != 0) 1205 release_region(ahd->bshs[1].ioport, 256); 1206 if (ahd->tags[0] == BUS_SPACE_MEMIO 1207 && ahd->bshs[0].maddr != NULL) { 1208 iounmap(ahd->bshs[0].maddr); 1209 release_mem_region(ahd->platform_data->mem_busaddr, 1210 0x1000); 1211 } 1212 if (ahd->platform_data->host) 1213 scsi_host_put(ahd->platform_data->host); 1214 1215 free(ahd->platform_data, M_DEVBUF); 1216 } 1217 } 1218 1219 void 1220 ahd_platform_init(struct ahd_softc *ahd) 1221 { 1222 /* 1223 * Lookup and commit any modified IO Cell options. 1224 */ 1225 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 1226 struct ahd_linux_iocell_opts *iocell_opts; 1227 1228 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1229 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1230 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1231 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1232 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1233 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1234 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1235 } 1236 1237 } 1238 1239 void 1240 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1241 { 1242 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1243 SCB_GET_CHANNEL(ahd, scb), 1244 SCB_GET_LUN(scb), SCB_LIST_NULL, 1245 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1246 } 1247 1248 void 1249 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev, 1250 struct ahd_devinfo *devinfo, ahd_queue_alg alg) 1251 { 1252 struct ahd_linux_device *dev; 1253 int was_queuing; 1254 int now_queuing; 1255 1256 if (sdev == NULL) 1257 return; 1258 1259 dev = scsi_transport_device_data(sdev); 1260 1261 if (dev == NULL) 1262 return; 1263 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1264 switch (alg) { 1265 default: 1266 case AHD_QUEUE_NONE: 1267 now_queuing = 0; 1268 break; 1269 case AHD_QUEUE_BASIC: 1270 now_queuing = AHD_DEV_Q_BASIC; 1271 break; 1272 case AHD_QUEUE_TAGGED: 1273 now_queuing = AHD_DEV_Q_TAGGED; 1274 break; 1275 } 1276 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1277 && (was_queuing != now_queuing) 1278 && (dev->active != 0)) { 1279 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1280 dev->qfrozen++; 1281 } 1282 1283 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1284 if (now_queuing) { 1285 u_int usertags; 1286 1287 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1288 if (!was_queuing) { 1289 /* 1290 * Start out agressively and allow our 1291 * dynamic queue depth algorithm to take 1292 * care of the rest. 1293 */ 1294 dev->maxtags = usertags; 1295 dev->openings = dev->maxtags - dev->active; 1296 } 1297 if (dev->maxtags == 0) { 1298 /* 1299 * Queueing is disabled by the user. 1300 */ 1301 dev->openings = 1; 1302 } else if (alg == AHD_QUEUE_TAGGED) { 1303 dev->flags |= AHD_DEV_Q_TAGGED; 1304 if (aic79xx_periodic_otag != 0) 1305 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1306 } else 1307 dev->flags |= AHD_DEV_Q_BASIC; 1308 } else { 1309 /* We can only have one opening. */ 1310 dev->maxtags = 0; 1311 dev->openings = 1 - dev->active; 1312 } 1313 1314 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1315 case AHD_DEV_Q_BASIC: 1316 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK); 1317 scsi_activate_tcq(sdev, dev->openings + dev->active); 1318 break; 1319 case AHD_DEV_Q_TAGGED: 1320 scsi_set_tag_type(sdev, MSG_ORDERED_TASK); 1321 scsi_activate_tcq(sdev, dev->openings + dev->active); 1322 break; 1323 default: 1324 /* 1325 * We allow the OS to queue 2 untagged transactions to 1326 * us at any time even though we can only execute them 1327 * serially on the controller/device. This should 1328 * remove some latency. 1329 */ 1330 scsi_deactivate_tcq(sdev, 1); 1331 break; 1332 } 1333 } 1334 1335 int 1336 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1337 int lun, u_int tag, role_t role, uint32_t status) 1338 { 1339 return 0; 1340 } 1341 1342 static u_int 1343 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1344 { 1345 static int warned_user; 1346 u_int tags; 1347 1348 tags = 0; 1349 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1350 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { 1351 1352 if (warned_user == 0) { 1353 printf(KERN_WARNING 1354 "aic79xx: WARNING: Insufficient tag_info instances\n" 1355 "aic79xx: for installed controllers. Using defaults\n" 1356 "aic79xx: Please update the aic79xx_tag_info array in\n" 1357 "aic79xx: the aic79xx_osm.c source file.\n"); 1358 warned_user++; 1359 } 1360 tags = AHD_MAX_QUEUE; 1361 } else { 1362 adapter_tag_info_t *tag_info; 1363 1364 tag_info = &aic79xx_tag_info[ahd->unit]; 1365 tags = tag_info->tag_commands[devinfo->target_offset]; 1366 if (tags > AHD_MAX_QUEUE) 1367 tags = AHD_MAX_QUEUE; 1368 } 1369 } 1370 return (tags); 1371 } 1372 1373 /* 1374 * Determines the queue depth for a given device. 1375 */ 1376 static void 1377 ahd_linux_device_queue_depth(struct scsi_device *sdev) 1378 { 1379 struct ahd_devinfo devinfo; 1380 u_int tags; 1381 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1382 1383 ahd_compile_devinfo(&devinfo, 1384 ahd->our_id, 1385 sdev->sdev_target->id, sdev->lun, 1386 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1387 ROLE_INITIATOR); 1388 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1389 if (tags != 0 && sdev->tagged_supported != 0) { 1390 1391 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); 1392 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1393 devinfo.lun, AC_TRANSFER_NEG); 1394 ahd_print_devinfo(ahd, &devinfo); 1395 printf("Tagged Queuing enabled. Depth %d\n", tags); 1396 } else { 1397 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); 1398 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1399 devinfo.lun, AC_TRANSFER_NEG); 1400 } 1401 } 1402 1403 static int 1404 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1405 struct scsi_cmnd *cmd) 1406 { 1407 struct scb *scb; 1408 struct hardware_scb *hscb; 1409 struct ahd_initiator_tinfo *tinfo; 1410 struct ahd_tmode_tstate *tstate; 1411 u_int col_idx; 1412 uint16_t mask; 1413 unsigned long flags; 1414 int nseg; 1415 1416 nseg = scsi_dma_map(cmd); 1417 if (nseg < 0) 1418 return SCSI_MLQUEUE_HOST_BUSY; 1419 1420 ahd_lock(ahd, &flags); 1421 1422 /* 1423 * Get an scb to use. 1424 */ 1425 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1426 cmd->device->id, &tstate); 1427 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1428 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1429 col_idx = AHD_NEVER_COL_IDX; 1430 } else { 1431 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1432 cmd->device->lun); 1433 } 1434 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1435 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1436 ahd_unlock(ahd, &flags); 1437 scsi_dma_unmap(cmd); 1438 return SCSI_MLQUEUE_HOST_BUSY; 1439 } 1440 1441 scb->io_ctx = cmd; 1442 scb->platform_data->dev = dev; 1443 hscb = scb->hscb; 1444 cmd->host_scribble = (char *)scb; 1445 1446 /* 1447 * Fill out basics of the HSCB. 1448 */ 1449 hscb->control = 0; 1450 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1451 hscb->lun = cmd->device->lun; 1452 scb->hscb->task_management = 0; 1453 mask = SCB_GET_TARGET_MASK(ahd, scb); 1454 1455 if ((ahd->user_discenable & mask) != 0) 1456 hscb->control |= DISCENB; 1457 1458 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1459 scb->flags |= SCB_PACKETIZED; 1460 1461 if ((tstate->auto_negotiate & mask) != 0) { 1462 scb->flags |= SCB_AUTO_NEGOTIATE; 1463 scb->hscb->control |= MK_MESSAGE; 1464 } 1465 1466 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1467 int msg_bytes; 1468 uint8_t tag_msgs[2]; 1469 1470 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1471 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1472 hscb->control |= tag_msgs[0]; 1473 if (tag_msgs[0] == MSG_ORDERED_TASK) 1474 dev->commands_since_idle_or_otag = 0; 1475 } else 1476 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1477 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1478 hscb->control |= MSG_ORDERED_TASK; 1479 dev->commands_since_idle_or_otag = 0; 1480 } else { 1481 hscb->control |= MSG_SIMPLE_TASK; 1482 } 1483 } 1484 1485 hscb->cdb_len = cmd->cmd_len; 1486 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1487 1488 scb->platform_data->xfer_len = 0; 1489 ahd_set_residual(scb, 0); 1490 ahd_set_sense_residual(scb, 0); 1491 scb->sg_count = 0; 1492 1493 if (nseg > 0) { 1494 void *sg = scb->sg_list; 1495 struct scatterlist *cur_seg; 1496 int i; 1497 1498 scb->platform_data->xfer_len = 0; 1499 1500 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1501 dma_addr_t addr; 1502 bus_size_t len; 1503 1504 addr = sg_dma_address(cur_seg); 1505 len = sg_dma_len(cur_seg); 1506 scb->platform_data->xfer_len += len; 1507 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1508 i == (nseg - 1)); 1509 } 1510 } 1511 1512 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1513 dev->openings--; 1514 dev->active++; 1515 dev->commands_issued++; 1516 1517 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1518 dev->commands_since_idle_or_otag++; 1519 scb->flags |= SCB_ACTIVE; 1520 ahd_queue_scb(ahd, scb); 1521 1522 ahd_unlock(ahd, &flags); 1523 1524 return 0; 1525 } 1526 1527 /* 1528 * SCSI controller interrupt handler. 1529 */ 1530 irqreturn_t 1531 ahd_linux_isr(int irq, void *dev_id) 1532 { 1533 struct ahd_softc *ahd; 1534 u_long flags; 1535 int ours; 1536 1537 ahd = (struct ahd_softc *) dev_id; 1538 ahd_lock(ahd, &flags); 1539 ours = ahd_intr(ahd); 1540 ahd_unlock(ahd, &flags); 1541 return IRQ_RETVAL(ours); 1542 } 1543 1544 void 1545 ahd_send_async(struct ahd_softc *ahd, char channel, 1546 u_int target, u_int lun, ac_code code) 1547 { 1548 switch (code) { 1549 case AC_TRANSFER_NEG: 1550 { 1551 char buf[80]; 1552 struct scsi_target *starget; 1553 struct info_str info; 1554 struct ahd_initiator_tinfo *tinfo; 1555 struct ahd_tmode_tstate *tstate; 1556 unsigned int target_ppr_options; 1557 1558 BUG_ON(target == CAM_TARGET_WILDCARD); 1559 1560 info.buffer = buf; 1561 info.length = sizeof(buf); 1562 info.offset = 0; 1563 info.pos = 0; 1564 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1565 target, &tstate); 1566 1567 /* 1568 * Don't bother reporting results while 1569 * negotiations are still pending. 1570 */ 1571 if (tinfo->curr.period != tinfo->goal.period 1572 || tinfo->curr.width != tinfo->goal.width 1573 || tinfo->curr.offset != tinfo->goal.offset 1574 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1575 if (bootverbose == 0) 1576 break; 1577 1578 /* 1579 * Don't bother reporting results that 1580 * are identical to those last reported. 1581 */ 1582 starget = ahd->platform_data->starget[target]; 1583 if (starget == NULL) 1584 break; 1585 1586 target_ppr_options = 1587 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1588 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1589 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1590 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1591 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1592 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1593 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1594 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1595 1596 if (tinfo->curr.period == spi_period(starget) 1597 && tinfo->curr.width == spi_width(starget) 1598 && tinfo->curr.offset == spi_offset(starget) 1599 && tinfo->curr.ppr_options == target_ppr_options) 1600 if (bootverbose == 0) 1601 break; 1602 1603 spi_period(starget) = tinfo->curr.period; 1604 spi_width(starget) = tinfo->curr.width; 1605 spi_offset(starget) = tinfo->curr.offset; 1606 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1607 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1608 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1609 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1610 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1611 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1612 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1613 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1614 spi_display_xfer_agreement(starget); 1615 break; 1616 } 1617 case AC_SENT_BDR: 1618 { 1619 WARN_ON(lun != CAM_LUN_WILDCARD); 1620 scsi_report_device_reset(ahd->platform_data->host, 1621 channel - 'A', target); 1622 break; 1623 } 1624 case AC_BUS_RESET: 1625 if (ahd->platform_data->host != NULL) { 1626 scsi_report_bus_reset(ahd->platform_data->host, 1627 channel - 'A'); 1628 } 1629 break; 1630 default: 1631 panic("ahd_send_async: Unexpected async event"); 1632 } 1633 } 1634 1635 /* 1636 * Calls the higher level scsi done function and frees the scb. 1637 */ 1638 void 1639 ahd_done(struct ahd_softc *ahd, struct scb *scb) 1640 { 1641 struct scsi_cmnd *cmd; 1642 struct ahd_linux_device *dev; 1643 1644 if ((scb->flags & SCB_ACTIVE) == 0) { 1645 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1646 ahd_dump_card_state(ahd); 1647 panic("Stopping for safety"); 1648 } 1649 LIST_REMOVE(scb, pending_links); 1650 cmd = scb->io_ctx; 1651 dev = scb->platform_data->dev; 1652 dev->active--; 1653 dev->openings++; 1654 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1655 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1656 dev->qfrozen--; 1657 } 1658 ahd_linux_unmap_scb(ahd, scb); 1659 1660 /* 1661 * Guard against stale sense data. 1662 * The Linux mid-layer assumes that sense 1663 * was retrieved anytime the first byte of 1664 * the sense buffer looks "sane". 1665 */ 1666 cmd->sense_buffer[0] = 0; 1667 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1668 uint32_t amount_xferred; 1669 1670 amount_xferred = 1671 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1672 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1673 #ifdef AHD_DEBUG 1674 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1675 ahd_print_path(ahd, scb); 1676 printf("Set CAM_UNCOR_PARITY\n"); 1677 } 1678 #endif 1679 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1680 #ifdef AHD_REPORT_UNDERFLOWS 1681 /* 1682 * This code is disabled by default as some 1683 * clients of the SCSI system do not properly 1684 * initialize the underflow parameter. This 1685 * results in spurious termination of commands 1686 * that complete as expected (e.g. underflow is 1687 * allowed as command can return variable amounts 1688 * of data. 1689 */ 1690 } else if (amount_xferred < scb->io_ctx->underflow) { 1691 u_int i; 1692 1693 ahd_print_path(ahd, scb); 1694 printf("CDB:"); 1695 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1696 printf(" 0x%x", scb->io_ctx->cmnd[i]); 1697 printf("\n"); 1698 ahd_print_path(ahd, scb); 1699 printf("Saw underflow (%ld of %ld bytes). " 1700 "Treated as error\n", 1701 ahd_get_residual(scb), 1702 ahd_get_transfer_length(scb)); 1703 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1704 #endif 1705 } else { 1706 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1707 } 1708 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1709 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1710 } 1711 1712 if (dev->openings == 1 1713 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1714 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1715 dev->tag_success_count++; 1716 /* 1717 * Some devices deal with temporary internal resource 1718 * shortages by returning queue full. When the queue 1719 * full occurrs, we throttle back. Slowly try to get 1720 * back to our previous queue depth. 1721 */ 1722 if ((dev->openings + dev->active) < dev->maxtags 1723 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1724 dev->tag_success_count = 0; 1725 dev->openings++; 1726 } 1727 1728 if (dev->active == 0) 1729 dev->commands_since_idle_or_otag = 0; 1730 1731 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1732 printf("Recovery SCB completes\n"); 1733 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1734 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1735 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1736 1737 if (ahd->platform_data->eh_done) 1738 complete(ahd->platform_data->eh_done); 1739 } 1740 1741 ahd_free_scb(ahd, scb); 1742 ahd_linux_queue_cmd_complete(ahd, cmd); 1743 } 1744 1745 static void 1746 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1747 struct scsi_device *sdev, struct scb *scb) 1748 { 1749 struct ahd_devinfo devinfo; 1750 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1751 1752 ahd_compile_devinfo(&devinfo, 1753 ahd->our_id, 1754 sdev->sdev_target->id, sdev->lun, 1755 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1756 ROLE_INITIATOR); 1757 1758 /* 1759 * We don't currently trust the mid-layer to 1760 * properly deal with queue full or busy. So, 1761 * when one occurs, we tell the mid-layer to 1762 * unconditionally requeue the command to us 1763 * so that we can retry it ourselves. We also 1764 * implement our own throttling mechanism so 1765 * we don't clobber the device with too many 1766 * commands. 1767 */ 1768 switch (ahd_get_scsi_status(scb)) { 1769 default: 1770 break; 1771 case SCSI_STATUS_CHECK_COND: 1772 case SCSI_STATUS_CMD_TERMINATED: 1773 { 1774 struct scsi_cmnd *cmd; 1775 1776 /* 1777 * Copy sense information to the OS's cmd 1778 * structure if it is available. 1779 */ 1780 cmd = scb->io_ctx; 1781 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1782 struct scsi_status_iu_header *siu; 1783 u_int sense_size; 1784 u_int sense_offset; 1785 1786 if (scb->flags & SCB_SENSE) { 1787 sense_size = min(sizeof(struct scsi_sense_data) 1788 - ahd_get_sense_residual(scb), 1789 (u_long)SCSI_SENSE_BUFFERSIZE); 1790 sense_offset = 0; 1791 } else { 1792 /* 1793 * Copy only the sense data into the provided 1794 * buffer. 1795 */ 1796 siu = (struct scsi_status_iu_header *) 1797 scb->sense_data; 1798 sense_size = min_t(size_t, 1799 scsi_4btoul(siu->sense_length), 1800 SCSI_SENSE_BUFFERSIZE); 1801 sense_offset = SIU_SENSE_OFFSET(siu); 1802 } 1803 1804 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1805 memcpy(cmd->sense_buffer, 1806 ahd_get_sense_buf(ahd, scb) 1807 + sense_offset, sense_size); 1808 cmd->result |= (DRIVER_SENSE << 24); 1809 1810 #ifdef AHD_DEBUG 1811 if (ahd_debug & AHD_SHOW_SENSE) { 1812 int i; 1813 1814 printf("Copied %d bytes of sense data at %d:", 1815 sense_size, sense_offset); 1816 for (i = 0; i < sense_size; i++) { 1817 if ((i & 0xF) == 0) 1818 printf("\n"); 1819 printf("0x%x ", cmd->sense_buffer[i]); 1820 } 1821 printf("\n"); 1822 } 1823 #endif 1824 } 1825 break; 1826 } 1827 case SCSI_STATUS_QUEUE_FULL: 1828 /* 1829 * By the time the core driver has returned this 1830 * command, all other commands that were queued 1831 * to us but not the device have been returned. 1832 * This ensures that dev->active is equal to 1833 * the number of commands actually queued to 1834 * the device. 1835 */ 1836 dev->tag_success_count = 0; 1837 if (dev->active != 0) { 1838 /* 1839 * Drop our opening count to the number 1840 * of commands currently outstanding. 1841 */ 1842 dev->openings = 0; 1843 #ifdef AHD_DEBUG 1844 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1845 ahd_print_path(ahd, scb); 1846 printf("Dropping tag count to %d\n", 1847 dev->active); 1848 } 1849 #endif 1850 if (dev->active == dev->tags_on_last_queuefull) { 1851 1852 dev->last_queuefull_same_count++; 1853 /* 1854 * If we repeatedly see a queue full 1855 * at the same queue depth, this 1856 * device has a fixed number of tag 1857 * slots. Lock in this tag depth 1858 * so we stop seeing queue fulls from 1859 * this device. 1860 */ 1861 if (dev->last_queuefull_same_count 1862 == AHD_LOCK_TAGS_COUNT) { 1863 dev->maxtags = dev->active; 1864 ahd_print_path(ahd, scb); 1865 printf("Locking max tag count at %d\n", 1866 dev->active); 1867 } 1868 } else { 1869 dev->tags_on_last_queuefull = dev->active; 1870 dev->last_queuefull_same_count = 0; 1871 } 1872 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 1873 ahd_set_scsi_status(scb, SCSI_STATUS_OK); 1874 ahd_platform_set_tags(ahd, sdev, &devinfo, 1875 (dev->flags & AHD_DEV_Q_BASIC) 1876 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 1877 break; 1878 } 1879 /* 1880 * Drop down to a single opening, and treat this 1881 * as if the target returned BUSY SCSI status. 1882 */ 1883 dev->openings = 1; 1884 ahd_platform_set_tags(ahd, sdev, &devinfo, 1885 (dev->flags & AHD_DEV_Q_BASIC) 1886 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 1887 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); 1888 } 1889 } 1890 1891 static void 1892 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 1893 { 1894 int status; 1895 int new_status = DID_OK; 1896 int do_fallback = 0; 1897 int scsi_status; 1898 1899 /* 1900 * Map CAM error codes into Linux Error codes. We 1901 * avoid the conversion so that the DV code has the 1902 * full error information available when making 1903 * state change decisions. 1904 */ 1905 1906 status = ahd_cmd_get_transaction_status(cmd); 1907 switch (status) { 1908 case CAM_REQ_INPROG: 1909 case CAM_REQ_CMP: 1910 new_status = DID_OK; 1911 break; 1912 case CAM_AUTOSENSE_FAIL: 1913 new_status = DID_ERROR; 1914 /* Fallthrough */ 1915 case CAM_SCSI_STATUS_ERROR: 1916 scsi_status = ahd_cmd_get_scsi_status(cmd); 1917 1918 switch(scsi_status) { 1919 case SCSI_STATUS_CMD_TERMINATED: 1920 case SCSI_STATUS_CHECK_COND: 1921 if ((cmd->result >> 24) != DRIVER_SENSE) { 1922 do_fallback = 1; 1923 } else { 1924 struct scsi_sense_data *sense; 1925 1926 sense = (struct scsi_sense_data *) 1927 cmd->sense_buffer; 1928 if (sense->extra_len >= 5 && 1929 (sense->add_sense_code == 0x47 1930 || sense->add_sense_code == 0x48)) 1931 do_fallback = 1; 1932 } 1933 break; 1934 default: 1935 break; 1936 } 1937 break; 1938 case CAM_REQ_ABORTED: 1939 new_status = DID_ABORT; 1940 break; 1941 case CAM_BUSY: 1942 new_status = DID_BUS_BUSY; 1943 break; 1944 case CAM_REQ_INVALID: 1945 case CAM_PATH_INVALID: 1946 new_status = DID_BAD_TARGET; 1947 break; 1948 case CAM_SEL_TIMEOUT: 1949 new_status = DID_NO_CONNECT; 1950 break; 1951 case CAM_SCSI_BUS_RESET: 1952 case CAM_BDR_SENT: 1953 new_status = DID_RESET; 1954 break; 1955 case CAM_UNCOR_PARITY: 1956 new_status = DID_PARITY; 1957 do_fallback = 1; 1958 break; 1959 case CAM_CMD_TIMEOUT: 1960 new_status = DID_TIME_OUT; 1961 do_fallback = 1; 1962 break; 1963 case CAM_REQ_CMP_ERR: 1964 case CAM_UNEXP_BUSFREE: 1965 case CAM_DATA_RUN_ERR: 1966 new_status = DID_ERROR; 1967 do_fallback = 1; 1968 break; 1969 case CAM_UA_ABORT: 1970 case CAM_NO_HBA: 1971 case CAM_SEQUENCE_FAIL: 1972 case CAM_CCB_LEN_ERR: 1973 case CAM_PROVIDE_FAIL: 1974 case CAM_REQ_TERMIO: 1975 case CAM_UNREC_HBA_ERROR: 1976 case CAM_REQ_TOO_BIG: 1977 new_status = DID_ERROR; 1978 break; 1979 case CAM_REQUEUE_REQ: 1980 new_status = DID_REQUEUE; 1981 break; 1982 default: 1983 /* We should never get here */ 1984 new_status = DID_ERROR; 1985 break; 1986 } 1987 1988 if (do_fallback) { 1989 printf("%s: device overrun (status %x) on %d:%d:%d\n", 1990 ahd_name(ahd), status, cmd->device->channel, 1991 cmd->device->id, cmd->device->lun); 1992 } 1993 1994 ahd_cmd_set_transaction_status(cmd, new_status); 1995 1996 cmd->scsi_done(cmd); 1997 } 1998 1999 static void 2000 ahd_freeze_simq(struct ahd_softc *ahd) 2001 { 2002 scsi_block_requests(ahd->platform_data->host); 2003 } 2004 2005 static void 2006 ahd_release_simq(struct ahd_softc *ahd) 2007 { 2008 scsi_unblock_requests(ahd->platform_data->host); 2009 } 2010 2011 static int 2012 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2013 { 2014 struct ahd_softc *ahd; 2015 struct ahd_linux_device *dev; 2016 struct scb *pending_scb; 2017 u_int saved_scbptr; 2018 u_int active_scbptr; 2019 u_int last_phase; 2020 u_int saved_scsiid; 2021 u_int cdb_byte; 2022 int retval; 2023 int was_paused; 2024 int paused; 2025 int wait; 2026 int disconnected; 2027 ahd_mode_state saved_modes; 2028 unsigned long flags; 2029 2030 pending_scb = NULL; 2031 paused = FALSE; 2032 wait = FALSE; 2033 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2034 2035 scmd_printk(KERN_INFO, cmd, 2036 "Attempting to queue an ABORT message:"); 2037 2038 printf("CDB:"); 2039 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2040 printf(" 0x%x", cmd->cmnd[cdb_byte]); 2041 printf("\n"); 2042 2043 ahd_lock(ahd, &flags); 2044 2045 /* 2046 * First determine if we currently own this command. 2047 * Start by searching the device queue. If not found 2048 * there, check the pending_scb list. If not found 2049 * at all, and the system wanted us to just abort the 2050 * command, return success. 2051 */ 2052 dev = scsi_transport_device_data(cmd->device); 2053 2054 if (dev == NULL) { 2055 /* 2056 * No target device for this command exists, 2057 * so we must not still own the command. 2058 */ 2059 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2060 retval = SUCCESS; 2061 goto no_cmd; 2062 } 2063 2064 /* 2065 * See if we can find a matching cmd in the pending list. 2066 */ 2067 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2068 if (pending_scb->io_ctx == cmd) 2069 break; 2070 } 2071 2072 if (pending_scb == NULL) { 2073 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2074 goto no_cmd; 2075 } 2076 2077 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2078 /* 2079 * We can't queue two recovery actions using the same SCB 2080 */ 2081 retval = FAILED; 2082 goto done; 2083 } 2084 2085 /* 2086 * Ensure that the card doesn't do anything 2087 * behind our back. Also make sure that we 2088 * didn't "just" miss an interrupt that would 2089 * affect this cmd. 2090 */ 2091 was_paused = ahd_is_paused(ahd); 2092 ahd_pause_and_flushwork(ahd); 2093 paused = TRUE; 2094 2095 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2096 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2097 goto no_cmd; 2098 } 2099 2100 printf("%s: At time of recovery, card was %spaused\n", 2101 ahd_name(ahd), was_paused ? "" : "not "); 2102 ahd_dump_card_state(ahd); 2103 2104 disconnected = TRUE; 2105 if (ahd_search_qinfifo(ahd, cmd->device->id, 2106 cmd->device->channel + 'A', 2107 cmd->device->lun, 2108 pending_scb->hscb->tag, 2109 ROLE_INITIATOR, CAM_REQ_ABORTED, 2110 SEARCH_COMPLETE) > 0) { 2111 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2112 ahd_name(ahd), cmd->device->channel, 2113 cmd->device->id, cmd->device->lun); 2114 retval = SUCCESS; 2115 goto done; 2116 } 2117 2118 saved_modes = ahd_save_modes(ahd); 2119 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2120 last_phase = ahd_inb(ahd, LASTPHASE); 2121 saved_scbptr = ahd_get_scbptr(ahd); 2122 active_scbptr = saved_scbptr; 2123 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2124 struct scb *bus_scb; 2125 2126 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2127 if (bus_scb == pending_scb) 2128 disconnected = FALSE; 2129 } 2130 2131 /* 2132 * At this point, pending_scb is the scb associated with the 2133 * passed in command. That command is currently active on the 2134 * bus or is in the disconnected state. 2135 */ 2136 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); 2137 if (last_phase != P_BUSFREE 2138 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2139 2140 /* 2141 * We're active on the bus, so assert ATN 2142 * and hope that the target responds. 2143 */ 2144 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2145 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2146 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2147 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2148 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2149 wait = TRUE; 2150 } else if (disconnected) { 2151 2152 /* 2153 * Actually re-queue this SCB in an attempt 2154 * to select the device before it reconnects. 2155 */ 2156 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2157 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2158 pending_scb->hscb->cdb_len = 0; 2159 pending_scb->hscb->task_attribute = 0; 2160 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2161 2162 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2163 /* 2164 * Mark the SCB has having an outstanding 2165 * task management function. Should the command 2166 * complete normally before the task management 2167 * function can be sent, the host will be notified 2168 * to abort our requeued SCB. 2169 */ 2170 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2171 pending_scb->hscb->task_management); 2172 } else { 2173 /* 2174 * If non-packetized, set the MK_MESSAGE control 2175 * bit indicating that we desire to send a message. 2176 * We also set the disconnected flag since there is 2177 * no guarantee that our SCB control byte matches 2178 * the version on the card. We don't want the 2179 * sequencer to abort the command thinking an 2180 * unsolicited reselection occurred. 2181 */ 2182 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2183 2184 /* 2185 * The sequencer will never re-reference the 2186 * in-core SCB. To make sure we are notified 2187 * during reslection, set the MK_MESSAGE flag in 2188 * the card's copy of the SCB. 2189 */ 2190 ahd_outb(ahd, SCB_CONTROL, 2191 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2192 } 2193 2194 /* 2195 * Clear out any entries in the QINFIFO first 2196 * so we are the next SCB for this target 2197 * to run. 2198 */ 2199 ahd_search_qinfifo(ahd, cmd->device->id, 2200 cmd->device->channel + 'A', cmd->device->lun, 2201 SCB_LIST_NULL, ROLE_INITIATOR, 2202 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2203 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2204 ahd_set_scbptr(ahd, saved_scbptr); 2205 ahd_print_path(ahd, pending_scb); 2206 printf("Device is disconnected, re-queuing SCB\n"); 2207 wait = TRUE; 2208 } else { 2209 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2210 retval = FAILED; 2211 goto done; 2212 } 2213 2214 no_cmd: 2215 /* 2216 * Our assumption is that if we don't have the command, no 2217 * recovery action was required, so we return success. Again, 2218 * the semantics of the mid-layer recovery engine are not 2219 * well defined, so this may change in time. 2220 */ 2221 retval = SUCCESS; 2222 done: 2223 if (paused) 2224 ahd_unpause(ahd); 2225 if (wait) { 2226 DECLARE_COMPLETION_ONSTACK(done); 2227 2228 ahd->platform_data->eh_done = &done; 2229 ahd_unlock(ahd, &flags); 2230 2231 printf("%s: Recovery code sleeping\n", ahd_name(ahd)); 2232 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2233 ahd_lock(ahd, &flags); 2234 ahd->platform_data->eh_done = NULL; 2235 ahd_unlock(ahd, &flags); 2236 printf("%s: Timer Expired (active %d)\n", 2237 ahd_name(ahd), dev->active); 2238 retval = FAILED; 2239 } 2240 printf("Recovery code awake\n"); 2241 } else 2242 ahd_unlock(ahd, &flags); 2243 2244 if (retval != SUCCESS) 2245 printf("%s: Command abort returning 0x%x\n", 2246 ahd_name(ahd), retval); 2247 2248 return retval; 2249 } 2250 2251 static void ahd_linux_set_width(struct scsi_target *starget, int width) 2252 { 2253 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2254 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2255 struct ahd_devinfo devinfo; 2256 unsigned long flags; 2257 2258 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2259 starget->channel + 'A', ROLE_INITIATOR); 2260 ahd_lock(ahd, &flags); 2261 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2262 ahd_unlock(ahd, &flags); 2263 } 2264 2265 static void ahd_linux_set_period(struct scsi_target *starget, int period) 2266 { 2267 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2268 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2269 struct ahd_tmode_tstate *tstate; 2270 struct ahd_initiator_tinfo *tinfo 2271 = ahd_fetch_transinfo(ahd, 2272 starget->channel + 'A', 2273 shost->this_id, starget->id, &tstate); 2274 struct ahd_devinfo devinfo; 2275 unsigned int ppr_options = tinfo->goal.ppr_options; 2276 unsigned int dt; 2277 unsigned long flags; 2278 unsigned long offset = tinfo->goal.offset; 2279 2280 #ifdef AHD_DEBUG 2281 if ((ahd_debug & AHD_SHOW_DV) != 0) 2282 printf("%s: set period to %d\n", ahd_name(ahd), period); 2283 #endif 2284 if (offset == 0) 2285 offset = MAX_OFFSET; 2286 2287 if (period < 8) 2288 period = 8; 2289 if (period < 10) { 2290 if (spi_max_width(starget)) { 2291 ppr_options |= MSG_EXT_PPR_DT_REQ; 2292 if (period == 8) 2293 ppr_options |= MSG_EXT_PPR_IU_REQ; 2294 } else 2295 period = 10; 2296 } 2297 2298 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2299 2300 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2301 starget->channel + 'A', ROLE_INITIATOR); 2302 2303 /* all PPR requests apart from QAS require wide transfers */ 2304 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2305 if (spi_width(starget) == 0) 2306 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2307 } 2308 2309 ahd_find_syncrate(ahd, &period, &ppr_options, 2310 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2311 2312 ahd_lock(ahd, &flags); 2313 ahd_set_syncrate(ahd, &devinfo, period, offset, 2314 ppr_options, AHD_TRANS_GOAL, FALSE); 2315 ahd_unlock(ahd, &flags); 2316 } 2317 2318 static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2319 { 2320 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2321 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2322 struct ahd_tmode_tstate *tstate; 2323 struct ahd_initiator_tinfo *tinfo 2324 = ahd_fetch_transinfo(ahd, 2325 starget->channel + 'A', 2326 shost->this_id, starget->id, &tstate); 2327 struct ahd_devinfo devinfo; 2328 unsigned int ppr_options = 0; 2329 unsigned int period = 0; 2330 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2331 unsigned long flags; 2332 2333 #ifdef AHD_DEBUG 2334 if ((ahd_debug & AHD_SHOW_DV) != 0) 2335 printf("%s: set offset to %d\n", ahd_name(ahd), offset); 2336 #endif 2337 2338 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2339 starget->channel + 'A', ROLE_INITIATOR); 2340 if (offset != 0) { 2341 period = tinfo->goal.period; 2342 ppr_options = tinfo->goal.ppr_options; 2343 ahd_find_syncrate(ahd, &period, &ppr_options, 2344 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2345 } 2346 2347 ahd_lock(ahd, &flags); 2348 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2349 AHD_TRANS_GOAL, FALSE); 2350 ahd_unlock(ahd, &flags); 2351 } 2352 2353 static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2354 { 2355 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2356 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2357 struct ahd_tmode_tstate *tstate; 2358 struct ahd_initiator_tinfo *tinfo 2359 = ahd_fetch_transinfo(ahd, 2360 starget->channel + 'A', 2361 shost->this_id, starget->id, &tstate); 2362 struct ahd_devinfo devinfo; 2363 unsigned int ppr_options = tinfo->goal.ppr_options 2364 & ~MSG_EXT_PPR_DT_REQ; 2365 unsigned int period = tinfo->goal.period; 2366 unsigned int width = tinfo->goal.width; 2367 unsigned long flags; 2368 2369 #ifdef AHD_DEBUG 2370 if ((ahd_debug & AHD_SHOW_DV) != 0) 2371 printf("%s: %s DT\n", ahd_name(ahd), 2372 dt ? "enabling" : "disabling"); 2373 #endif 2374 if (dt && spi_max_width(starget)) { 2375 ppr_options |= MSG_EXT_PPR_DT_REQ; 2376 if (!width) 2377 ahd_linux_set_width(starget, 1); 2378 } else { 2379 if (period <= 9) 2380 period = 10; /* If resetting DT, period must be >= 25ns */ 2381 /* IU is invalid without DT set */ 2382 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2383 } 2384 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2385 starget->channel + 'A', ROLE_INITIATOR); 2386 ahd_find_syncrate(ahd, &period, &ppr_options, 2387 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2388 2389 ahd_lock(ahd, &flags); 2390 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2391 ppr_options, AHD_TRANS_GOAL, FALSE); 2392 ahd_unlock(ahd, &flags); 2393 } 2394 2395 static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2396 { 2397 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2398 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2399 struct ahd_tmode_tstate *tstate; 2400 struct ahd_initiator_tinfo *tinfo 2401 = ahd_fetch_transinfo(ahd, 2402 starget->channel + 'A', 2403 shost->this_id, starget->id, &tstate); 2404 struct ahd_devinfo devinfo; 2405 unsigned int ppr_options = tinfo->goal.ppr_options 2406 & ~MSG_EXT_PPR_QAS_REQ; 2407 unsigned int period = tinfo->goal.period; 2408 unsigned int dt; 2409 unsigned long flags; 2410 2411 #ifdef AHD_DEBUG 2412 if ((ahd_debug & AHD_SHOW_DV) != 0) 2413 printf("%s: %s QAS\n", ahd_name(ahd), 2414 qas ? "enabling" : "disabling"); 2415 #endif 2416 2417 if (qas) { 2418 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2419 } 2420 2421 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2422 2423 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2424 starget->channel + 'A', ROLE_INITIATOR); 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, tinfo->goal.offset, 2430 ppr_options, AHD_TRANS_GOAL, FALSE); 2431 ahd_unlock(ahd, &flags); 2432 } 2433 2434 static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 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 = tinfo->goal.ppr_options 2445 & ~MSG_EXT_PPR_IU_REQ; 2446 unsigned int period = tinfo->goal.period; 2447 unsigned int dt; 2448 unsigned long flags; 2449 2450 #ifdef AHD_DEBUG 2451 if ((ahd_debug & AHD_SHOW_DV) != 0) 2452 printf("%s: %s IU\n", ahd_name(ahd), 2453 iu ? "enabling" : "disabling"); 2454 #endif 2455 2456 if (iu && spi_max_width(starget)) { 2457 ppr_options |= MSG_EXT_PPR_IU_REQ; 2458 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2459 } 2460 2461 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2462 2463 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2464 starget->channel + 'A', ROLE_INITIATOR); 2465 ahd_find_syncrate(ahd, &period, &ppr_options, 2466 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2467 2468 ahd_lock(ahd, &flags); 2469 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2470 ppr_options, AHD_TRANS_GOAL, FALSE); 2471 ahd_unlock(ahd, &flags); 2472 } 2473 2474 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2475 { 2476 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2477 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2478 struct ahd_tmode_tstate *tstate; 2479 struct ahd_initiator_tinfo *tinfo 2480 = ahd_fetch_transinfo(ahd, 2481 starget->channel + 'A', 2482 shost->this_id, starget->id, &tstate); 2483 struct ahd_devinfo devinfo; 2484 unsigned int ppr_options = tinfo->goal.ppr_options 2485 & ~MSG_EXT_PPR_RD_STRM; 2486 unsigned int period = tinfo->goal.period; 2487 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2488 unsigned long flags; 2489 2490 #ifdef AHD_DEBUG 2491 if ((ahd_debug & AHD_SHOW_DV) != 0) 2492 printf("%s: %s Read Streaming\n", ahd_name(ahd), 2493 rdstrm ? "enabling" : "disabling"); 2494 #endif 2495 2496 if (rdstrm && spi_max_width(starget)) 2497 ppr_options |= MSG_EXT_PPR_RD_STRM; 2498 2499 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2500 starget->channel + 'A', ROLE_INITIATOR); 2501 ahd_find_syncrate(ahd, &period, &ppr_options, 2502 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2503 2504 ahd_lock(ahd, &flags); 2505 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2506 ppr_options, AHD_TRANS_GOAL, FALSE); 2507 ahd_unlock(ahd, &flags); 2508 } 2509 2510 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2511 { 2512 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2513 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2514 struct ahd_tmode_tstate *tstate; 2515 struct ahd_initiator_tinfo *tinfo 2516 = ahd_fetch_transinfo(ahd, 2517 starget->channel + 'A', 2518 shost->this_id, starget->id, &tstate); 2519 struct ahd_devinfo devinfo; 2520 unsigned int ppr_options = tinfo->goal.ppr_options 2521 & ~MSG_EXT_PPR_WR_FLOW; 2522 unsigned int period = tinfo->goal.period; 2523 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2524 unsigned long flags; 2525 2526 #ifdef AHD_DEBUG 2527 if ((ahd_debug & AHD_SHOW_DV) != 0) 2528 printf("%s: %s Write Flow Control\n", ahd_name(ahd), 2529 wrflow ? "enabling" : "disabling"); 2530 #endif 2531 2532 if (wrflow && spi_max_width(starget)) 2533 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2534 2535 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2536 starget->channel + 'A', ROLE_INITIATOR); 2537 ahd_find_syncrate(ahd, &period, &ppr_options, 2538 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2539 2540 ahd_lock(ahd, &flags); 2541 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2542 ppr_options, AHD_TRANS_GOAL, FALSE); 2543 ahd_unlock(ahd, &flags); 2544 } 2545 2546 static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2547 { 2548 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2549 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2550 struct ahd_tmode_tstate *tstate; 2551 struct ahd_initiator_tinfo *tinfo 2552 = ahd_fetch_transinfo(ahd, 2553 starget->channel + 'A', 2554 shost->this_id, starget->id, &tstate); 2555 struct ahd_devinfo devinfo; 2556 unsigned int ppr_options = tinfo->goal.ppr_options 2557 & ~MSG_EXT_PPR_RTI; 2558 unsigned int period = tinfo->goal.period; 2559 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2560 unsigned long flags; 2561 2562 if ((ahd->features & AHD_RTI) == 0) { 2563 #ifdef AHD_DEBUG 2564 if ((ahd_debug & AHD_SHOW_DV) != 0) 2565 printf("%s: RTI not available\n", ahd_name(ahd)); 2566 #endif 2567 return; 2568 } 2569 2570 #ifdef AHD_DEBUG 2571 if ((ahd_debug & AHD_SHOW_DV) != 0) 2572 printf("%s: %s RTI\n", ahd_name(ahd), 2573 rti ? "enabling" : "disabling"); 2574 #endif 2575 2576 if (rti && spi_max_width(starget)) 2577 ppr_options |= MSG_EXT_PPR_RTI; 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 2590 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 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_PCOMP_EN; 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 printf("%s: %s Precompensation\n", ahd_name(ahd), 2609 pcomp ? "Enable" : "Disable"); 2610 #endif 2611 2612 if (pcomp && spi_max_width(starget)) { 2613 uint8_t precomp; 2614 2615 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 2616 struct ahd_linux_iocell_opts *iocell_opts; 2617 2618 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2619 precomp = iocell_opts->precomp; 2620 } else { 2621 precomp = AIC79XX_DEFAULT_PRECOMP; 2622 } 2623 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2624 AHD_SET_PRECOMP(ahd, precomp); 2625 } else { 2626 AHD_SET_PRECOMP(ahd, 0); 2627 } 2628 2629 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2630 starget->channel + 'A', ROLE_INITIATOR); 2631 ahd_find_syncrate(ahd, &period, &ppr_options, 2632 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2633 2634 ahd_lock(ahd, &flags); 2635 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2636 ppr_options, AHD_TRANS_GOAL, FALSE); 2637 ahd_unlock(ahd, &flags); 2638 } 2639 2640 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2641 { 2642 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2643 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2644 struct ahd_tmode_tstate *tstate; 2645 struct ahd_initiator_tinfo *tinfo 2646 = ahd_fetch_transinfo(ahd, 2647 starget->channel + 'A', 2648 shost->this_id, starget->id, &tstate); 2649 struct ahd_devinfo devinfo; 2650 unsigned int ppr_options = tinfo->goal.ppr_options 2651 & ~MSG_EXT_PPR_HOLD_MCS; 2652 unsigned int period = tinfo->goal.period; 2653 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2654 unsigned long flags; 2655 2656 if (hold && spi_max_width(starget)) 2657 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2658 2659 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2660 starget->channel + 'A', ROLE_INITIATOR); 2661 ahd_find_syncrate(ahd, &period, &ppr_options, 2662 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2663 2664 ahd_lock(ahd, &flags); 2665 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2666 ppr_options, AHD_TRANS_GOAL, FALSE); 2667 ahd_unlock(ahd, &flags); 2668 } 2669 2670 static void ahd_linux_get_signalling(struct Scsi_Host *shost) 2671 { 2672 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; 2673 unsigned long flags; 2674 u8 mode; 2675 2676 ahd_lock(ahd, &flags); 2677 ahd_pause(ahd); 2678 mode = ahd_inb(ahd, SBLKCTL); 2679 ahd_unpause(ahd); 2680 ahd_unlock(ahd, &flags); 2681 2682 if (mode & ENAB40) 2683 spi_signalling(shost) = SPI_SIGNAL_LVD; 2684 else if (mode & ENAB20) 2685 spi_signalling(shost) = SPI_SIGNAL_SE; 2686 else 2687 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2688 } 2689 2690 static struct spi_function_template ahd_linux_transport_functions = { 2691 .set_offset = ahd_linux_set_offset, 2692 .show_offset = 1, 2693 .set_period = ahd_linux_set_period, 2694 .show_period = 1, 2695 .set_width = ahd_linux_set_width, 2696 .show_width = 1, 2697 .set_dt = ahd_linux_set_dt, 2698 .show_dt = 1, 2699 .set_iu = ahd_linux_set_iu, 2700 .show_iu = 1, 2701 .set_qas = ahd_linux_set_qas, 2702 .show_qas = 1, 2703 .set_rd_strm = ahd_linux_set_rd_strm, 2704 .show_rd_strm = 1, 2705 .set_wr_flow = ahd_linux_set_wr_flow, 2706 .show_wr_flow = 1, 2707 .set_rti = ahd_linux_set_rti, 2708 .show_rti = 1, 2709 .set_pcomp_en = ahd_linux_set_pcomp_en, 2710 .show_pcomp_en = 1, 2711 .set_hold_mcs = ahd_linux_set_hold_mcs, 2712 .show_hold_mcs = 1, 2713 .get_signalling = ahd_linux_get_signalling, 2714 }; 2715 2716 static int __init 2717 ahd_linux_init(void) 2718 { 2719 int error = 0; 2720 2721 /* 2722 * If we've been passed any parameters, process them now. 2723 */ 2724 if (aic79xx) 2725 aic79xx_setup(aic79xx); 2726 2727 ahd_linux_transport_template = 2728 spi_attach_transport(&ahd_linux_transport_functions); 2729 if (!ahd_linux_transport_template) 2730 return -ENODEV; 2731 2732 scsi_transport_reserve_device(ahd_linux_transport_template, 2733 sizeof(struct ahd_linux_device)); 2734 2735 error = ahd_linux_pci_init(); 2736 if (error) 2737 spi_release_transport(ahd_linux_transport_template); 2738 return error; 2739 } 2740 2741 static void __exit 2742 ahd_linux_exit(void) 2743 { 2744 ahd_linux_pci_exit(); 2745 spi_release_transport(ahd_linux_transport_template); 2746 } 2747 2748 module_init(ahd_linux_init); 2749 module_exit(ahd_linux_exit); 2750