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 ahd_lock(ahd, &flags); 1417 1418 /* 1419 * Get an scb to use. 1420 */ 1421 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1422 cmd->device->id, &tstate); 1423 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1424 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1425 col_idx = AHD_NEVER_COL_IDX; 1426 } else { 1427 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1428 cmd->device->lun); 1429 } 1430 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1431 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1432 ahd_unlock(ahd, &flags); 1433 return SCSI_MLQUEUE_HOST_BUSY; 1434 } 1435 1436 scb->io_ctx = cmd; 1437 scb->platform_data->dev = dev; 1438 hscb = scb->hscb; 1439 cmd->host_scribble = (char *)scb; 1440 1441 /* 1442 * Fill out basics of the HSCB. 1443 */ 1444 hscb->control = 0; 1445 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1446 hscb->lun = cmd->device->lun; 1447 scb->hscb->task_management = 0; 1448 mask = SCB_GET_TARGET_MASK(ahd, scb); 1449 1450 if ((ahd->user_discenable & mask) != 0) 1451 hscb->control |= DISCENB; 1452 1453 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1454 scb->flags |= SCB_PACKETIZED; 1455 1456 if ((tstate->auto_negotiate & mask) != 0) { 1457 scb->flags |= SCB_AUTO_NEGOTIATE; 1458 scb->hscb->control |= MK_MESSAGE; 1459 } 1460 1461 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1462 int msg_bytes; 1463 uint8_t tag_msgs[2]; 1464 1465 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1466 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1467 hscb->control |= tag_msgs[0]; 1468 if (tag_msgs[0] == MSG_ORDERED_TASK) 1469 dev->commands_since_idle_or_otag = 0; 1470 } else 1471 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1472 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1473 hscb->control |= MSG_ORDERED_TASK; 1474 dev->commands_since_idle_or_otag = 0; 1475 } else { 1476 hscb->control |= MSG_SIMPLE_TASK; 1477 } 1478 } 1479 1480 hscb->cdb_len = cmd->cmd_len; 1481 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1482 1483 scb->platform_data->xfer_len = 0; 1484 ahd_set_residual(scb, 0); 1485 ahd_set_sense_residual(scb, 0); 1486 scb->sg_count = 0; 1487 1488 nseg = scsi_dma_map(cmd); 1489 BUG_ON(nseg < 0); 1490 if (nseg > 0) { 1491 void *sg = scb->sg_list; 1492 struct scatterlist *cur_seg; 1493 int i; 1494 1495 scb->platform_data->xfer_len = 0; 1496 1497 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1498 dma_addr_t addr; 1499 bus_size_t len; 1500 1501 addr = sg_dma_address(cur_seg); 1502 len = sg_dma_len(cur_seg); 1503 scb->platform_data->xfer_len += len; 1504 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1505 i == (nseg - 1)); 1506 } 1507 } 1508 1509 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1510 dev->openings--; 1511 dev->active++; 1512 dev->commands_issued++; 1513 1514 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1515 dev->commands_since_idle_or_otag++; 1516 scb->flags |= SCB_ACTIVE; 1517 ahd_queue_scb(ahd, scb); 1518 1519 ahd_unlock(ahd, &flags); 1520 1521 return 0; 1522 } 1523 1524 /* 1525 * SCSI controller interrupt handler. 1526 */ 1527 irqreturn_t 1528 ahd_linux_isr(int irq, void *dev_id) 1529 { 1530 struct ahd_softc *ahd; 1531 u_long flags; 1532 int ours; 1533 1534 ahd = (struct ahd_softc *) dev_id; 1535 ahd_lock(ahd, &flags); 1536 ours = ahd_intr(ahd); 1537 ahd_unlock(ahd, &flags); 1538 return IRQ_RETVAL(ours); 1539 } 1540 1541 void 1542 ahd_send_async(struct ahd_softc *ahd, char channel, 1543 u_int target, u_int lun, ac_code code) 1544 { 1545 switch (code) { 1546 case AC_TRANSFER_NEG: 1547 { 1548 char buf[80]; 1549 struct scsi_target *starget; 1550 struct info_str info; 1551 struct ahd_initiator_tinfo *tinfo; 1552 struct ahd_tmode_tstate *tstate; 1553 unsigned int target_ppr_options; 1554 1555 BUG_ON(target == CAM_TARGET_WILDCARD); 1556 1557 info.buffer = buf; 1558 info.length = sizeof(buf); 1559 info.offset = 0; 1560 info.pos = 0; 1561 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1562 target, &tstate); 1563 1564 /* 1565 * Don't bother reporting results while 1566 * negotiations are still pending. 1567 */ 1568 if (tinfo->curr.period != tinfo->goal.period 1569 || tinfo->curr.width != tinfo->goal.width 1570 || tinfo->curr.offset != tinfo->goal.offset 1571 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1572 if (bootverbose == 0) 1573 break; 1574 1575 /* 1576 * Don't bother reporting results that 1577 * are identical to those last reported. 1578 */ 1579 starget = ahd->platform_data->starget[target]; 1580 if (starget == NULL) 1581 break; 1582 1583 target_ppr_options = 1584 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1585 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1586 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1587 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1588 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1589 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1590 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1591 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1592 1593 if (tinfo->curr.period == spi_period(starget) 1594 && tinfo->curr.width == spi_width(starget) 1595 && tinfo->curr.offset == spi_offset(starget) 1596 && tinfo->curr.ppr_options == target_ppr_options) 1597 if (bootverbose == 0) 1598 break; 1599 1600 spi_period(starget) = tinfo->curr.period; 1601 spi_width(starget) = tinfo->curr.width; 1602 spi_offset(starget) = tinfo->curr.offset; 1603 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1604 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1605 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1606 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1607 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1608 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1609 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1610 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1611 spi_display_xfer_agreement(starget); 1612 break; 1613 } 1614 case AC_SENT_BDR: 1615 { 1616 WARN_ON(lun != CAM_LUN_WILDCARD); 1617 scsi_report_device_reset(ahd->platform_data->host, 1618 channel - 'A', target); 1619 break; 1620 } 1621 case AC_BUS_RESET: 1622 if (ahd->platform_data->host != NULL) { 1623 scsi_report_bus_reset(ahd->platform_data->host, 1624 channel - 'A'); 1625 } 1626 break; 1627 default: 1628 panic("ahd_send_async: Unexpected async event"); 1629 } 1630 } 1631 1632 /* 1633 * Calls the higher level scsi done function and frees the scb. 1634 */ 1635 void 1636 ahd_done(struct ahd_softc *ahd, struct scb *scb) 1637 { 1638 struct scsi_cmnd *cmd; 1639 struct ahd_linux_device *dev; 1640 1641 if ((scb->flags & SCB_ACTIVE) == 0) { 1642 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1643 ahd_dump_card_state(ahd); 1644 panic("Stopping for safety"); 1645 } 1646 LIST_REMOVE(scb, pending_links); 1647 cmd = scb->io_ctx; 1648 dev = scb->platform_data->dev; 1649 dev->active--; 1650 dev->openings++; 1651 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1652 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1653 dev->qfrozen--; 1654 } 1655 ahd_linux_unmap_scb(ahd, scb); 1656 1657 /* 1658 * Guard against stale sense data. 1659 * The Linux mid-layer assumes that sense 1660 * was retrieved anytime the first byte of 1661 * the sense buffer looks "sane". 1662 */ 1663 cmd->sense_buffer[0] = 0; 1664 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1665 uint32_t amount_xferred; 1666 1667 amount_xferred = 1668 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1669 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1670 #ifdef AHD_DEBUG 1671 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1672 ahd_print_path(ahd, scb); 1673 printf("Set CAM_UNCOR_PARITY\n"); 1674 } 1675 #endif 1676 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1677 #ifdef AHD_REPORT_UNDERFLOWS 1678 /* 1679 * This code is disabled by default as some 1680 * clients of the SCSI system do not properly 1681 * initialize the underflow parameter. This 1682 * results in spurious termination of commands 1683 * that complete as expected (e.g. underflow is 1684 * allowed as command can return variable amounts 1685 * of data. 1686 */ 1687 } else if (amount_xferred < scb->io_ctx->underflow) { 1688 u_int i; 1689 1690 ahd_print_path(ahd, scb); 1691 printf("CDB:"); 1692 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1693 printf(" 0x%x", scb->io_ctx->cmnd[i]); 1694 printf("\n"); 1695 ahd_print_path(ahd, scb); 1696 printf("Saw underflow (%ld of %ld bytes). " 1697 "Treated as error\n", 1698 ahd_get_residual(scb), 1699 ahd_get_transfer_length(scb)); 1700 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1701 #endif 1702 } else { 1703 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1704 } 1705 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1706 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1707 } 1708 1709 if (dev->openings == 1 1710 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1711 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1712 dev->tag_success_count++; 1713 /* 1714 * Some devices deal with temporary internal resource 1715 * shortages by returning queue full. When the queue 1716 * full occurrs, we throttle back. Slowly try to get 1717 * back to our previous queue depth. 1718 */ 1719 if ((dev->openings + dev->active) < dev->maxtags 1720 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1721 dev->tag_success_count = 0; 1722 dev->openings++; 1723 } 1724 1725 if (dev->active == 0) 1726 dev->commands_since_idle_or_otag = 0; 1727 1728 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1729 printf("Recovery SCB completes\n"); 1730 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1731 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1732 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1733 1734 if (ahd->platform_data->eh_done) 1735 complete(ahd->platform_data->eh_done); 1736 } 1737 1738 ahd_free_scb(ahd, scb); 1739 ahd_linux_queue_cmd_complete(ahd, cmd); 1740 } 1741 1742 static void 1743 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1744 struct scsi_device *sdev, struct scb *scb) 1745 { 1746 struct ahd_devinfo devinfo; 1747 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1748 1749 ahd_compile_devinfo(&devinfo, 1750 ahd->our_id, 1751 sdev->sdev_target->id, sdev->lun, 1752 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1753 ROLE_INITIATOR); 1754 1755 /* 1756 * We don't currently trust the mid-layer to 1757 * properly deal with queue full or busy. So, 1758 * when one occurs, we tell the mid-layer to 1759 * unconditionally requeue the command to us 1760 * so that we can retry it ourselves. We also 1761 * implement our own throttling mechanism so 1762 * we don't clobber the device with too many 1763 * commands. 1764 */ 1765 switch (ahd_get_scsi_status(scb)) { 1766 default: 1767 break; 1768 case SCSI_STATUS_CHECK_COND: 1769 case SCSI_STATUS_CMD_TERMINATED: 1770 { 1771 struct scsi_cmnd *cmd; 1772 1773 /* 1774 * Copy sense information to the OS's cmd 1775 * structure if it is available. 1776 */ 1777 cmd = scb->io_ctx; 1778 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1779 struct scsi_status_iu_header *siu; 1780 u_int sense_size; 1781 u_int sense_offset; 1782 1783 if (scb->flags & SCB_SENSE) { 1784 sense_size = min(sizeof(struct scsi_sense_data) 1785 - ahd_get_sense_residual(scb), 1786 (u_long)SCSI_SENSE_BUFFERSIZE); 1787 sense_offset = 0; 1788 } else { 1789 /* 1790 * Copy only the sense data into the provided 1791 * buffer. 1792 */ 1793 siu = (struct scsi_status_iu_header *) 1794 scb->sense_data; 1795 sense_size = min_t(size_t, 1796 scsi_4btoul(siu->sense_length), 1797 SCSI_SENSE_BUFFERSIZE); 1798 sense_offset = SIU_SENSE_OFFSET(siu); 1799 } 1800 1801 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1802 memcpy(cmd->sense_buffer, 1803 ahd_get_sense_buf(ahd, scb) 1804 + sense_offset, sense_size); 1805 cmd->result |= (DRIVER_SENSE << 24); 1806 1807 #ifdef AHD_DEBUG 1808 if (ahd_debug & AHD_SHOW_SENSE) { 1809 int i; 1810 1811 printf("Copied %d bytes of sense data at %d:", 1812 sense_size, sense_offset); 1813 for (i = 0; i < sense_size; i++) { 1814 if ((i & 0xF) == 0) 1815 printf("\n"); 1816 printf("0x%x ", cmd->sense_buffer[i]); 1817 } 1818 printf("\n"); 1819 } 1820 #endif 1821 } 1822 break; 1823 } 1824 case SCSI_STATUS_QUEUE_FULL: 1825 /* 1826 * By the time the core driver has returned this 1827 * command, all other commands that were queued 1828 * to us but not the device have been returned. 1829 * This ensures that dev->active is equal to 1830 * the number of commands actually queued to 1831 * the device. 1832 */ 1833 dev->tag_success_count = 0; 1834 if (dev->active != 0) { 1835 /* 1836 * Drop our opening count to the number 1837 * of commands currently outstanding. 1838 */ 1839 dev->openings = 0; 1840 #ifdef AHD_DEBUG 1841 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1842 ahd_print_path(ahd, scb); 1843 printf("Dropping tag count to %d\n", 1844 dev->active); 1845 } 1846 #endif 1847 if (dev->active == dev->tags_on_last_queuefull) { 1848 1849 dev->last_queuefull_same_count++; 1850 /* 1851 * If we repeatedly see a queue full 1852 * at the same queue depth, this 1853 * device has a fixed number of tag 1854 * slots. Lock in this tag depth 1855 * so we stop seeing queue fulls from 1856 * this device. 1857 */ 1858 if (dev->last_queuefull_same_count 1859 == AHD_LOCK_TAGS_COUNT) { 1860 dev->maxtags = dev->active; 1861 ahd_print_path(ahd, scb); 1862 printf("Locking max tag count at %d\n", 1863 dev->active); 1864 } 1865 } else { 1866 dev->tags_on_last_queuefull = dev->active; 1867 dev->last_queuefull_same_count = 0; 1868 } 1869 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 1870 ahd_set_scsi_status(scb, SCSI_STATUS_OK); 1871 ahd_platform_set_tags(ahd, sdev, &devinfo, 1872 (dev->flags & AHD_DEV_Q_BASIC) 1873 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 1874 break; 1875 } 1876 /* 1877 * Drop down to a single opening, and treat this 1878 * as if the target returned BUSY SCSI status. 1879 */ 1880 dev->openings = 1; 1881 ahd_platform_set_tags(ahd, sdev, &devinfo, 1882 (dev->flags & AHD_DEV_Q_BASIC) 1883 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 1884 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); 1885 } 1886 } 1887 1888 static void 1889 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 1890 { 1891 int status; 1892 int new_status = DID_OK; 1893 int do_fallback = 0; 1894 int scsi_status; 1895 1896 /* 1897 * Map CAM error codes into Linux Error codes. We 1898 * avoid the conversion so that the DV code has the 1899 * full error information available when making 1900 * state change decisions. 1901 */ 1902 1903 status = ahd_cmd_get_transaction_status(cmd); 1904 switch (status) { 1905 case CAM_REQ_INPROG: 1906 case CAM_REQ_CMP: 1907 new_status = DID_OK; 1908 break; 1909 case CAM_AUTOSENSE_FAIL: 1910 new_status = DID_ERROR; 1911 /* Fallthrough */ 1912 case CAM_SCSI_STATUS_ERROR: 1913 scsi_status = ahd_cmd_get_scsi_status(cmd); 1914 1915 switch(scsi_status) { 1916 case SCSI_STATUS_CMD_TERMINATED: 1917 case SCSI_STATUS_CHECK_COND: 1918 if ((cmd->result >> 24) != DRIVER_SENSE) { 1919 do_fallback = 1; 1920 } else { 1921 struct scsi_sense_data *sense; 1922 1923 sense = (struct scsi_sense_data *) 1924 cmd->sense_buffer; 1925 if (sense->extra_len >= 5 && 1926 (sense->add_sense_code == 0x47 1927 || sense->add_sense_code == 0x48)) 1928 do_fallback = 1; 1929 } 1930 break; 1931 default: 1932 break; 1933 } 1934 break; 1935 case CAM_REQ_ABORTED: 1936 new_status = DID_ABORT; 1937 break; 1938 case CAM_BUSY: 1939 new_status = DID_BUS_BUSY; 1940 break; 1941 case CAM_REQ_INVALID: 1942 case CAM_PATH_INVALID: 1943 new_status = DID_BAD_TARGET; 1944 break; 1945 case CAM_SEL_TIMEOUT: 1946 new_status = DID_NO_CONNECT; 1947 break; 1948 case CAM_SCSI_BUS_RESET: 1949 case CAM_BDR_SENT: 1950 new_status = DID_RESET; 1951 break; 1952 case CAM_UNCOR_PARITY: 1953 new_status = DID_PARITY; 1954 do_fallback = 1; 1955 break; 1956 case CAM_CMD_TIMEOUT: 1957 new_status = DID_TIME_OUT; 1958 do_fallback = 1; 1959 break; 1960 case CAM_REQ_CMP_ERR: 1961 case CAM_UNEXP_BUSFREE: 1962 case CAM_DATA_RUN_ERR: 1963 new_status = DID_ERROR; 1964 do_fallback = 1; 1965 break; 1966 case CAM_UA_ABORT: 1967 case CAM_NO_HBA: 1968 case CAM_SEQUENCE_FAIL: 1969 case CAM_CCB_LEN_ERR: 1970 case CAM_PROVIDE_FAIL: 1971 case CAM_REQ_TERMIO: 1972 case CAM_UNREC_HBA_ERROR: 1973 case CAM_REQ_TOO_BIG: 1974 new_status = DID_ERROR; 1975 break; 1976 case CAM_REQUEUE_REQ: 1977 new_status = DID_REQUEUE; 1978 break; 1979 default: 1980 /* We should never get here */ 1981 new_status = DID_ERROR; 1982 break; 1983 } 1984 1985 if (do_fallback) { 1986 printf("%s: device overrun (status %x) on %d:%d:%d\n", 1987 ahd_name(ahd), status, cmd->device->channel, 1988 cmd->device->id, cmd->device->lun); 1989 } 1990 1991 ahd_cmd_set_transaction_status(cmd, new_status); 1992 1993 cmd->scsi_done(cmd); 1994 } 1995 1996 static void 1997 ahd_freeze_simq(struct ahd_softc *ahd) 1998 { 1999 scsi_block_requests(ahd->platform_data->host); 2000 } 2001 2002 static void 2003 ahd_release_simq(struct ahd_softc *ahd) 2004 { 2005 scsi_unblock_requests(ahd->platform_data->host); 2006 } 2007 2008 static int 2009 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2010 { 2011 struct ahd_softc *ahd; 2012 struct ahd_linux_device *dev; 2013 struct scb *pending_scb; 2014 u_int saved_scbptr; 2015 u_int active_scbptr; 2016 u_int last_phase; 2017 u_int saved_scsiid; 2018 u_int cdb_byte; 2019 int retval; 2020 int was_paused; 2021 int paused; 2022 int wait; 2023 int disconnected; 2024 ahd_mode_state saved_modes; 2025 unsigned long flags; 2026 2027 pending_scb = NULL; 2028 paused = FALSE; 2029 wait = FALSE; 2030 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2031 2032 scmd_printk(KERN_INFO, cmd, 2033 "Attempting to queue an ABORT message:"); 2034 2035 printf("CDB:"); 2036 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2037 printf(" 0x%x", cmd->cmnd[cdb_byte]); 2038 printf("\n"); 2039 2040 ahd_lock(ahd, &flags); 2041 2042 /* 2043 * First determine if we currently own this command. 2044 * Start by searching the device queue. If not found 2045 * there, check the pending_scb list. If not found 2046 * at all, and the system wanted us to just abort the 2047 * command, return success. 2048 */ 2049 dev = scsi_transport_device_data(cmd->device); 2050 2051 if (dev == NULL) { 2052 /* 2053 * No target device for this command exists, 2054 * so we must not still own the command. 2055 */ 2056 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2057 retval = SUCCESS; 2058 goto no_cmd; 2059 } 2060 2061 /* 2062 * See if we can find a matching cmd in the pending list. 2063 */ 2064 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2065 if (pending_scb->io_ctx == cmd) 2066 break; 2067 } 2068 2069 if (pending_scb == NULL) { 2070 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2071 goto no_cmd; 2072 } 2073 2074 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2075 /* 2076 * We can't queue two recovery actions using the same SCB 2077 */ 2078 retval = FAILED; 2079 goto done; 2080 } 2081 2082 /* 2083 * Ensure that the card doesn't do anything 2084 * behind our back. Also make sure that we 2085 * didn't "just" miss an interrupt that would 2086 * affect this cmd. 2087 */ 2088 was_paused = ahd_is_paused(ahd); 2089 ahd_pause_and_flushwork(ahd); 2090 paused = TRUE; 2091 2092 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2093 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2094 goto no_cmd; 2095 } 2096 2097 printf("%s: At time of recovery, card was %spaused\n", 2098 ahd_name(ahd), was_paused ? "" : "not "); 2099 ahd_dump_card_state(ahd); 2100 2101 disconnected = TRUE; 2102 if (ahd_search_qinfifo(ahd, cmd->device->id, 2103 cmd->device->channel + 'A', 2104 cmd->device->lun, 2105 pending_scb->hscb->tag, 2106 ROLE_INITIATOR, CAM_REQ_ABORTED, 2107 SEARCH_COMPLETE) > 0) { 2108 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2109 ahd_name(ahd), cmd->device->channel, 2110 cmd->device->id, cmd->device->lun); 2111 retval = SUCCESS; 2112 goto done; 2113 } 2114 2115 saved_modes = ahd_save_modes(ahd); 2116 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2117 last_phase = ahd_inb(ahd, LASTPHASE); 2118 saved_scbptr = ahd_get_scbptr(ahd); 2119 active_scbptr = saved_scbptr; 2120 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2121 struct scb *bus_scb; 2122 2123 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2124 if (bus_scb == pending_scb) 2125 disconnected = FALSE; 2126 } 2127 2128 /* 2129 * At this point, pending_scb is the scb associated with the 2130 * passed in command. That command is currently active on the 2131 * bus or is in the disconnected state. 2132 */ 2133 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); 2134 if (last_phase != P_BUSFREE 2135 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2136 2137 /* 2138 * We're active on the bus, so assert ATN 2139 * and hope that the target responds. 2140 */ 2141 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2142 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2143 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2144 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2145 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2146 wait = TRUE; 2147 } else if (disconnected) { 2148 2149 /* 2150 * Actually re-queue this SCB in an attempt 2151 * to select the device before it reconnects. 2152 */ 2153 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2154 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2155 pending_scb->hscb->cdb_len = 0; 2156 pending_scb->hscb->task_attribute = 0; 2157 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2158 2159 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2160 /* 2161 * Mark the SCB has having an outstanding 2162 * task management function. Should the command 2163 * complete normally before the task management 2164 * function can be sent, the host will be notified 2165 * to abort our requeued SCB. 2166 */ 2167 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2168 pending_scb->hscb->task_management); 2169 } else { 2170 /* 2171 * If non-packetized, set the MK_MESSAGE control 2172 * bit indicating that we desire to send a message. 2173 * We also set the disconnected flag since there is 2174 * no guarantee that our SCB control byte matches 2175 * the version on the card. We don't want the 2176 * sequencer to abort the command thinking an 2177 * unsolicited reselection occurred. 2178 */ 2179 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2180 2181 /* 2182 * The sequencer will never re-reference the 2183 * in-core SCB. To make sure we are notified 2184 * during reslection, set the MK_MESSAGE flag in 2185 * the card's copy of the SCB. 2186 */ 2187 ahd_outb(ahd, SCB_CONTROL, 2188 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2189 } 2190 2191 /* 2192 * Clear out any entries in the QINFIFO first 2193 * so we are the next SCB for this target 2194 * to run. 2195 */ 2196 ahd_search_qinfifo(ahd, cmd->device->id, 2197 cmd->device->channel + 'A', cmd->device->lun, 2198 SCB_LIST_NULL, ROLE_INITIATOR, 2199 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2200 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2201 ahd_set_scbptr(ahd, saved_scbptr); 2202 ahd_print_path(ahd, pending_scb); 2203 printf("Device is disconnected, re-queuing SCB\n"); 2204 wait = TRUE; 2205 } else { 2206 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2207 retval = FAILED; 2208 goto done; 2209 } 2210 2211 no_cmd: 2212 /* 2213 * Our assumption is that if we don't have the command, no 2214 * recovery action was required, so we return success. Again, 2215 * the semantics of the mid-layer recovery engine are not 2216 * well defined, so this may change in time. 2217 */ 2218 retval = SUCCESS; 2219 done: 2220 if (paused) 2221 ahd_unpause(ahd); 2222 if (wait) { 2223 DECLARE_COMPLETION_ONSTACK(done); 2224 2225 ahd->platform_data->eh_done = &done; 2226 ahd_unlock(ahd, &flags); 2227 2228 printf("%s: Recovery code sleeping\n", ahd_name(ahd)); 2229 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2230 ahd_lock(ahd, &flags); 2231 ahd->platform_data->eh_done = NULL; 2232 ahd_unlock(ahd, &flags); 2233 printf("%s: Timer Expired (active %d)\n", 2234 ahd_name(ahd), dev->active); 2235 retval = FAILED; 2236 } 2237 printf("Recovery code awake\n"); 2238 } else 2239 ahd_unlock(ahd, &flags); 2240 2241 if (retval != SUCCESS) 2242 printf("%s: Command abort returning 0x%x\n", 2243 ahd_name(ahd), retval); 2244 2245 return retval; 2246 } 2247 2248 static void ahd_linux_set_width(struct scsi_target *starget, int width) 2249 { 2250 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2251 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2252 struct ahd_devinfo devinfo; 2253 unsigned long flags; 2254 2255 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2256 starget->channel + 'A', ROLE_INITIATOR); 2257 ahd_lock(ahd, &flags); 2258 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2259 ahd_unlock(ahd, &flags); 2260 } 2261 2262 static void ahd_linux_set_period(struct scsi_target *starget, int period) 2263 { 2264 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2265 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2266 struct ahd_tmode_tstate *tstate; 2267 struct ahd_initiator_tinfo *tinfo 2268 = ahd_fetch_transinfo(ahd, 2269 starget->channel + 'A', 2270 shost->this_id, starget->id, &tstate); 2271 struct ahd_devinfo devinfo; 2272 unsigned int ppr_options = tinfo->goal.ppr_options; 2273 unsigned int dt; 2274 unsigned long flags; 2275 unsigned long offset = tinfo->goal.offset; 2276 2277 #ifdef AHD_DEBUG 2278 if ((ahd_debug & AHD_SHOW_DV) != 0) 2279 printf("%s: set period to %d\n", ahd_name(ahd), period); 2280 #endif 2281 if (offset == 0) 2282 offset = MAX_OFFSET; 2283 2284 if (period < 8) 2285 period = 8; 2286 if (period < 10) { 2287 if (spi_max_width(starget)) { 2288 ppr_options |= MSG_EXT_PPR_DT_REQ; 2289 if (period == 8) 2290 ppr_options |= MSG_EXT_PPR_IU_REQ; 2291 } else 2292 period = 10; 2293 } 2294 2295 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2296 2297 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2298 starget->channel + 'A', ROLE_INITIATOR); 2299 2300 /* all PPR requests apart from QAS require wide transfers */ 2301 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2302 if (spi_width(starget) == 0) 2303 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2304 } 2305 2306 ahd_find_syncrate(ahd, &period, &ppr_options, 2307 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2308 2309 ahd_lock(ahd, &flags); 2310 ahd_set_syncrate(ahd, &devinfo, period, offset, 2311 ppr_options, AHD_TRANS_GOAL, FALSE); 2312 ahd_unlock(ahd, &flags); 2313 } 2314 2315 static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2316 { 2317 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2318 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2319 struct ahd_tmode_tstate *tstate; 2320 struct ahd_initiator_tinfo *tinfo 2321 = ahd_fetch_transinfo(ahd, 2322 starget->channel + 'A', 2323 shost->this_id, starget->id, &tstate); 2324 struct ahd_devinfo devinfo; 2325 unsigned int ppr_options = 0; 2326 unsigned int period = 0; 2327 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2328 unsigned long flags; 2329 2330 #ifdef AHD_DEBUG 2331 if ((ahd_debug & AHD_SHOW_DV) != 0) 2332 printf("%s: set offset to %d\n", ahd_name(ahd), offset); 2333 #endif 2334 2335 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2336 starget->channel + 'A', ROLE_INITIATOR); 2337 if (offset != 0) { 2338 period = tinfo->goal.period; 2339 ppr_options = tinfo->goal.ppr_options; 2340 ahd_find_syncrate(ahd, &period, &ppr_options, 2341 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2342 } 2343 2344 ahd_lock(ahd, &flags); 2345 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2346 AHD_TRANS_GOAL, FALSE); 2347 ahd_unlock(ahd, &flags); 2348 } 2349 2350 static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2351 { 2352 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2353 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2354 struct ahd_tmode_tstate *tstate; 2355 struct ahd_initiator_tinfo *tinfo 2356 = ahd_fetch_transinfo(ahd, 2357 starget->channel + 'A', 2358 shost->this_id, starget->id, &tstate); 2359 struct ahd_devinfo devinfo; 2360 unsigned int ppr_options = tinfo->goal.ppr_options 2361 & ~MSG_EXT_PPR_DT_REQ; 2362 unsigned int period = tinfo->goal.period; 2363 unsigned int width = tinfo->goal.width; 2364 unsigned long flags; 2365 2366 #ifdef AHD_DEBUG 2367 if ((ahd_debug & AHD_SHOW_DV) != 0) 2368 printf("%s: %s DT\n", ahd_name(ahd), 2369 dt ? "enabling" : "disabling"); 2370 #endif 2371 if (dt && spi_max_width(starget)) { 2372 ppr_options |= MSG_EXT_PPR_DT_REQ; 2373 if (!width) 2374 ahd_linux_set_width(starget, 1); 2375 } else { 2376 if (period <= 9) 2377 period = 10; /* If resetting DT, period must be >= 25ns */ 2378 /* IU is invalid without DT set */ 2379 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2380 } 2381 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2382 starget->channel + 'A', ROLE_INITIATOR); 2383 ahd_find_syncrate(ahd, &period, &ppr_options, 2384 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2385 2386 ahd_lock(ahd, &flags); 2387 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2388 ppr_options, AHD_TRANS_GOAL, FALSE); 2389 ahd_unlock(ahd, &flags); 2390 } 2391 2392 static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2393 { 2394 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2395 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2396 struct ahd_tmode_tstate *tstate; 2397 struct ahd_initiator_tinfo *tinfo 2398 = ahd_fetch_transinfo(ahd, 2399 starget->channel + 'A', 2400 shost->this_id, starget->id, &tstate); 2401 struct ahd_devinfo devinfo; 2402 unsigned int ppr_options = tinfo->goal.ppr_options 2403 & ~MSG_EXT_PPR_QAS_REQ; 2404 unsigned int period = tinfo->goal.period; 2405 unsigned int dt; 2406 unsigned long flags; 2407 2408 #ifdef AHD_DEBUG 2409 if ((ahd_debug & AHD_SHOW_DV) != 0) 2410 printf("%s: %s QAS\n", ahd_name(ahd), 2411 qas ? "enabling" : "disabling"); 2412 #endif 2413 2414 if (qas) { 2415 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2416 } 2417 2418 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2419 2420 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2421 starget->channel + 'A', ROLE_INITIATOR); 2422 ahd_find_syncrate(ahd, &period, &ppr_options, 2423 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2424 2425 ahd_lock(ahd, &flags); 2426 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2427 ppr_options, AHD_TRANS_GOAL, FALSE); 2428 ahd_unlock(ahd, &flags); 2429 } 2430 2431 static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 2432 { 2433 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2434 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2435 struct ahd_tmode_tstate *tstate; 2436 struct ahd_initiator_tinfo *tinfo 2437 = ahd_fetch_transinfo(ahd, 2438 starget->channel + 'A', 2439 shost->this_id, starget->id, &tstate); 2440 struct ahd_devinfo devinfo; 2441 unsigned int ppr_options = tinfo->goal.ppr_options 2442 & ~MSG_EXT_PPR_IU_REQ; 2443 unsigned int period = tinfo->goal.period; 2444 unsigned int dt; 2445 unsigned long flags; 2446 2447 #ifdef AHD_DEBUG 2448 if ((ahd_debug & AHD_SHOW_DV) != 0) 2449 printf("%s: %s IU\n", ahd_name(ahd), 2450 iu ? "enabling" : "disabling"); 2451 #endif 2452 2453 if (iu && spi_max_width(starget)) { 2454 ppr_options |= MSG_EXT_PPR_IU_REQ; 2455 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2456 } 2457 2458 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2459 2460 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2461 starget->channel + 'A', ROLE_INITIATOR); 2462 ahd_find_syncrate(ahd, &period, &ppr_options, 2463 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2464 2465 ahd_lock(ahd, &flags); 2466 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2467 ppr_options, AHD_TRANS_GOAL, FALSE); 2468 ahd_unlock(ahd, &flags); 2469 } 2470 2471 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2472 { 2473 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2474 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2475 struct ahd_tmode_tstate *tstate; 2476 struct ahd_initiator_tinfo *tinfo 2477 = ahd_fetch_transinfo(ahd, 2478 starget->channel + 'A', 2479 shost->this_id, starget->id, &tstate); 2480 struct ahd_devinfo devinfo; 2481 unsigned int ppr_options = tinfo->goal.ppr_options 2482 & ~MSG_EXT_PPR_RD_STRM; 2483 unsigned int period = tinfo->goal.period; 2484 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2485 unsigned long flags; 2486 2487 #ifdef AHD_DEBUG 2488 if ((ahd_debug & AHD_SHOW_DV) != 0) 2489 printf("%s: %s Read Streaming\n", ahd_name(ahd), 2490 rdstrm ? "enabling" : "disabling"); 2491 #endif 2492 2493 if (rdstrm && spi_max_width(starget)) 2494 ppr_options |= MSG_EXT_PPR_RD_STRM; 2495 2496 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2497 starget->channel + 'A', ROLE_INITIATOR); 2498 ahd_find_syncrate(ahd, &period, &ppr_options, 2499 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2500 2501 ahd_lock(ahd, &flags); 2502 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2503 ppr_options, AHD_TRANS_GOAL, FALSE); 2504 ahd_unlock(ahd, &flags); 2505 } 2506 2507 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2508 { 2509 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2510 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2511 struct ahd_tmode_tstate *tstate; 2512 struct ahd_initiator_tinfo *tinfo 2513 = ahd_fetch_transinfo(ahd, 2514 starget->channel + 'A', 2515 shost->this_id, starget->id, &tstate); 2516 struct ahd_devinfo devinfo; 2517 unsigned int ppr_options = tinfo->goal.ppr_options 2518 & ~MSG_EXT_PPR_WR_FLOW; 2519 unsigned int period = tinfo->goal.period; 2520 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2521 unsigned long flags; 2522 2523 #ifdef AHD_DEBUG 2524 if ((ahd_debug & AHD_SHOW_DV) != 0) 2525 printf("%s: %s Write Flow Control\n", ahd_name(ahd), 2526 wrflow ? "enabling" : "disabling"); 2527 #endif 2528 2529 if (wrflow && spi_max_width(starget)) 2530 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2531 2532 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2533 starget->channel + 'A', ROLE_INITIATOR); 2534 ahd_find_syncrate(ahd, &period, &ppr_options, 2535 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2536 2537 ahd_lock(ahd, &flags); 2538 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2539 ppr_options, AHD_TRANS_GOAL, FALSE); 2540 ahd_unlock(ahd, &flags); 2541 } 2542 2543 static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2544 { 2545 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2546 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2547 struct ahd_tmode_tstate *tstate; 2548 struct ahd_initiator_tinfo *tinfo 2549 = ahd_fetch_transinfo(ahd, 2550 starget->channel + 'A', 2551 shost->this_id, starget->id, &tstate); 2552 struct ahd_devinfo devinfo; 2553 unsigned int ppr_options = tinfo->goal.ppr_options 2554 & ~MSG_EXT_PPR_RTI; 2555 unsigned int period = tinfo->goal.period; 2556 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2557 unsigned long flags; 2558 2559 if ((ahd->features & AHD_RTI) == 0) { 2560 #ifdef AHD_DEBUG 2561 if ((ahd_debug & AHD_SHOW_DV) != 0) 2562 printf("%s: RTI not available\n", ahd_name(ahd)); 2563 #endif 2564 return; 2565 } 2566 2567 #ifdef AHD_DEBUG 2568 if ((ahd_debug & AHD_SHOW_DV) != 0) 2569 printf("%s: %s RTI\n", ahd_name(ahd), 2570 rti ? "enabling" : "disabling"); 2571 #endif 2572 2573 if (rti && spi_max_width(starget)) 2574 ppr_options |= MSG_EXT_PPR_RTI; 2575 2576 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2577 starget->channel + 'A', ROLE_INITIATOR); 2578 ahd_find_syncrate(ahd, &period, &ppr_options, 2579 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2580 2581 ahd_lock(ahd, &flags); 2582 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2583 ppr_options, AHD_TRANS_GOAL, FALSE); 2584 ahd_unlock(ahd, &flags); 2585 } 2586 2587 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2588 { 2589 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2590 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2591 struct ahd_tmode_tstate *tstate; 2592 struct ahd_initiator_tinfo *tinfo 2593 = ahd_fetch_transinfo(ahd, 2594 starget->channel + 'A', 2595 shost->this_id, starget->id, &tstate); 2596 struct ahd_devinfo devinfo; 2597 unsigned int ppr_options = tinfo->goal.ppr_options 2598 & ~MSG_EXT_PPR_PCOMP_EN; 2599 unsigned int period = tinfo->goal.period; 2600 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2601 unsigned long flags; 2602 2603 #ifdef AHD_DEBUG 2604 if ((ahd_debug & AHD_SHOW_DV) != 0) 2605 printf("%s: %s Precompensation\n", ahd_name(ahd), 2606 pcomp ? "Enable" : "Disable"); 2607 #endif 2608 2609 if (pcomp && spi_max_width(starget)) { 2610 uint8_t precomp; 2611 2612 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 2613 struct ahd_linux_iocell_opts *iocell_opts; 2614 2615 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2616 precomp = iocell_opts->precomp; 2617 } else { 2618 precomp = AIC79XX_DEFAULT_PRECOMP; 2619 } 2620 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2621 AHD_SET_PRECOMP(ahd, precomp); 2622 } else { 2623 AHD_SET_PRECOMP(ahd, 0); 2624 } 2625 2626 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2627 starget->channel + 'A', ROLE_INITIATOR); 2628 ahd_find_syncrate(ahd, &period, &ppr_options, 2629 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2630 2631 ahd_lock(ahd, &flags); 2632 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2633 ppr_options, AHD_TRANS_GOAL, FALSE); 2634 ahd_unlock(ahd, &flags); 2635 } 2636 2637 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2638 { 2639 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2640 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2641 struct ahd_tmode_tstate *tstate; 2642 struct ahd_initiator_tinfo *tinfo 2643 = ahd_fetch_transinfo(ahd, 2644 starget->channel + 'A', 2645 shost->this_id, starget->id, &tstate); 2646 struct ahd_devinfo devinfo; 2647 unsigned int ppr_options = tinfo->goal.ppr_options 2648 & ~MSG_EXT_PPR_HOLD_MCS; 2649 unsigned int period = tinfo->goal.period; 2650 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2651 unsigned long flags; 2652 2653 if (hold && spi_max_width(starget)) 2654 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2655 2656 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2657 starget->channel + 'A', ROLE_INITIATOR); 2658 ahd_find_syncrate(ahd, &period, &ppr_options, 2659 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2660 2661 ahd_lock(ahd, &flags); 2662 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2663 ppr_options, AHD_TRANS_GOAL, FALSE); 2664 ahd_unlock(ahd, &flags); 2665 } 2666 2667 static void ahd_linux_get_signalling(struct Scsi_Host *shost) 2668 { 2669 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; 2670 unsigned long flags; 2671 u8 mode; 2672 2673 ahd_lock(ahd, &flags); 2674 ahd_pause(ahd); 2675 mode = ahd_inb(ahd, SBLKCTL); 2676 ahd_unpause(ahd); 2677 ahd_unlock(ahd, &flags); 2678 2679 if (mode & ENAB40) 2680 spi_signalling(shost) = SPI_SIGNAL_LVD; 2681 else if (mode & ENAB20) 2682 spi_signalling(shost) = SPI_SIGNAL_SE; 2683 else 2684 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2685 } 2686 2687 static struct spi_function_template ahd_linux_transport_functions = { 2688 .set_offset = ahd_linux_set_offset, 2689 .show_offset = 1, 2690 .set_period = ahd_linux_set_period, 2691 .show_period = 1, 2692 .set_width = ahd_linux_set_width, 2693 .show_width = 1, 2694 .set_dt = ahd_linux_set_dt, 2695 .show_dt = 1, 2696 .set_iu = ahd_linux_set_iu, 2697 .show_iu = 1, 2698 .set_qas = ahd_linux_set_qas, 2699 .show_qas = 1, 2700 .set_rd_strm = ahd_linux_set_rd_strm, 2701 .show_rd_strm = 1, 2702 .set_wr_flow = ahd_linux_set_wr_flow, 2703 .show_wr_flow = 1, 2704 .set_rti = ahd_linux_set_rti, 2705 .show_rti = 1, 2706 .set_pcomp_en = ahd_linux_set_pcomp_en, 2707 .show_pcomp_en = 1, 2708 .set_hold_mcs = ahd_linux_set_hold_mcs, 2709 .show_hold_mcs = 1, 2710 .get_signalling = ahd_linux_get_signalling, 2711 }; 2712 2713 static int __init 2714 ahd_linux_init(void) 2715 { 2716 int error = 0; 2717 2718 /* 2719 * If we've been passed any parameters, process them now. 2720 */ 2721 if (aic79xx) 2722 aic79xx_setup(aic79xx); 2723 2724 ahd_linux_transport_template = 2725 spi_attach_transport(&ahd_linux_transport_functions); 2726 if (!ahd_linux_transport_template) 2727 return -ENODEV; 2728 2729 scsi_transport_reserve_device(ahd_linux_transport_template, 2730 sizeof(struct ahd_linux_device)); 2731 2732 error = ahd_linux_pci_init(); 2733 if (error) 2734 spi_release_transport(ahd_linux_transport_template); 2735 return error; 2736 } 2737 2738 static void __exit 2739 ahd_linux_exit(void) 2740 { 2741 ahd_linux_pci_exit(); 2742 spi_release_transport(ahd_linux_transport_template); 2743 } 2744 2745 module_init(ahd_linux_init); 2746 module_exit(ahd_linux_exit); 2747