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 * Certain PCI motherboards will scan PCI devices from highest to lowest, 247 * others scan from lowest to highest, and they tend to do all kinds of 248 * strange things when they come into contact with PCI bridge chips. The 249 * net result of all this is that the PCI card that is actually used to boot 250 * the machine is very hard to detect. Most motherboards go from lowest 251 * PCI slot number to highest, and the first SCSI controller found is the 252 * one you boot from. The only exceptions to this are when a controller 253 * has its BIOS disabled. So, we by default sort all of our SCSI controllers 254 * from lowest PCI slot number to highest PCI slot number. We also force 255 * all controllers with their BIOS disabled to the end of the list. This 256 * works on *almost* all computers. Where it doesn't work, we have this 257 * option. Setting this option to non-0 will reverse the order of the sort 258 * to highest first, then lowest, but will still leave cards with their BIOS 259 * disabled at the very end. That should fix everyone up unless there are 260 * really strange cirumstances. 261 */ 262 static uint32_t aic79xx_reverse_scan; 263 264 /* 265 * Should we force EXTENDED translation on a controller. 266 * 0 == Use whatever is in the SEEPROM or default to off 267 * 1 == Use whatever is in the SEEPROM or default to on 268 */ 269 static uint32_t aic79xx_extended; 270 271 /* 272 * PCI bus parity checking of the Adaptec controllers. This is somewhat 273 * dubious at best. To my knowledge, this option has never actually 274 * solved a PCI parity problem, but on certain machines with broken PCI 275 * chipset configurations, it can generate tons of false error messages. 276 * It's included in the driver for completeness. 277 * 0 = Shut off PCI parity check 278 * non-0 = Enable PCI parity check 279 * 280 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this 281 * variable to -1 you would actually want to simply pass the variable 282 * name without a number. That will invert the 0 which will result in 283 * -1. 284 */ 285 static uint32_t aic79xx_pci_parity = ~0; 286 287 /* 288 * There are lots of broken chipsets in the world. Some of them will 289 * violate the PCI spec when we issue byte sized memory writes to our 290 * controller. I/O mapped register access, if allowed by the given 291 * platform, will work in almost all cases. 292 */ 293 uint32_t aic79xx_allow_memio = ~0; 294 295 /* 296 * So that we can set how long each device is given as a selection timeout. 297 * The table of values goes like this: 298 * 0 - 256ms 299 * 1 - 128ms 300 * 2 - 64ms 301 * 3 - 32ms 302 * We default to 256ms because some older devices need a longer time 303 * to respond to initial selection. 304 */ 305 static uint32_t aic79xx_seltime; 306 307 /* 308 * Certain devices do not perform any aging on commands. Should the 309 * device be saturated by commands in one portion of the disk, it is 310 * possible for transactions on far away sectors to never be serviced. 311 * To handle these devices, we can periodically send an ordered tag to 312 * force all outstanding transactions to be serviced prior to a new 313 * transaction. 314 */ 315 uint32_t aic79xx_periodic_otag; 316 317 /* 318 * Module information and settable options. 319 */ 320 static char *aic79xx = NULL; 321 322 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>"); 323 MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver"); 324 MODULE_LICENSE("Dual BSD/GPL"); 325 MODULE_VERSION(AIC79XX_DRIVER_VERSION); 326 module_param(aic79xx, charp, 0444); 327 MODULE_PARM_DESC(aic79xx, 328 "period delimited, options string.\n" 329 " verbose Enable verbose/diagnostic logging\n" 330 " allow_memio Allow device registers to be memory mapped\n" 331 " debug Bitmask of debug values to enable\n" 332 " no_reset Supress initial bus resets\n" 333 " extended Enable extended geometry on all controllers\n" 334 " periodic_otag Send an ordered tagged transaction\n" 335 " periodically to prevent tag starvation.\n" 336 " This may be required by some older disk\n" 337 " or drives/RAID arrays.\n" 338 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n" 339 " tag_info:<tag_str> Set per-target tag depth\n" 340 " global_tag_depth:<int> Global tag depth for all targets on all buses\n" 341 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" 342 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n" 343 " amplitude:<int> Set the signal amplitude (0-7).\n" 344 " seltime:<int> Selection Timeout:\n" 345 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 346 "\n" 347 " Sample /etc/modprobe.conf line:\n" 348 " Enable verbose logging\n" 349 " Set tag depth on Controller 2/Target 2 to 10 tags\n" 350 " Shorten the selection timeout to 128ms\n" 351 "\n" 352 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" 353 "\n"); 354 355 static void ahd_linux_handle_scsi_status(struct ahd_softc *, 356 struct scsi_device *, 357 struct scb *); 358 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, 359 struct scsi_cmnd *cmd); 360 static void ahd_linux_sem_timeout(u_long arg); 361 static int ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag); 362 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); 363 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, 364 struct ahd_devinfo *devinfo); 365 static void ahd_linux_device_queue_depth(struct scsi_device *); 366 static int ahd_linux_run_command(struct ahd_softc*, 367 struct ahd_linux_device *, 368 struct scsi_cmnd *); 369 static void ahd_linux_setup_tag_info_global(char *p); 370 static int aic79xx_setup(char *c); 371 372 static int ahd_linux_unit; 373 374 375 /****************************** Inlines ***************************************/ 376 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); 377 378 static __inline void 379 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) 380 { 381 struct scsi_cmnd *cmd; 382 int direction; 383 384 cmd = scb->io_ctx; 385 direction = cmd->sc_data_direction; 386 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); 387 if (cmd->use_sg != 0) { 388 struct scatterlist *sg; 389 390 sg = (struct scatterlist *)cmd->request_buffer; 391 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction); 392 } else if (cmd->request_bufflen != 0) { 393 pci_unmap_single(ahd->dev_softc, 394 scb->platform_data->buf_busaddr, 395 cmd->request_bufflen, direction); 396 } 397 } 398 399 /******************************** Macros **************************************/ 400 #define BUILD_SCSIID(ahd, cmd) \ 401 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id) 402 403 /* 404 * Return a string describing the driver. 405 */ 406 static const char * 407 ahd_linux_info(struct Scsi_Host *host) 408 { 409 static char buffer[512]; 410 char ahd_info[256]; 411 char *bp; 412 struct ahd_softc *ahd; 413 414 bp = &buffer[0]; 415 ahd = *(struct ahd_softc **)host->hostdata; 416 memset(bp, 0, sizeof(buffer)); 417 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev "); 418 strcat(bp, AIC79XX_DRIVER_VERSION); 419 strcat(bp, "\n"); 420 strcat(bp, " <"); 421 strcat(bp, ahd->description); 422 strcat(bp, ">\n"); 423 strcat(bp, " "); 424 ahd_controller_info(ahd, ahd_info); 425 strcat(bp, ahd_info); 426 strcat(bp, "\n"); 427 428 return (bp); 429 } 430 431 /* 432 * Queue an SCB to the controller. 433 */ 434 static int 435 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 436 { 437 struct ahd_softc *ahd; 438 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device); 439 int rtn = SCSI_MLQUEUE_HOST_BUSY; 440 unsigned long flags; 441 442 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 443 444 ahd_lock(ahd, &flags); 445 if (ahd->platform_data->qfrozen == 0) { 446 cmd->scsi_done = scsi_done; 447 cmd->result = CAM_REQ_INPROG << 16; 448 rtn = ahd_linux_run_command(ahd, dev, cmd); 449 450 } 451 ahd_unlock(ahd, &flags); 452 return rtn; 453 } 454 455 static inline struct scsi_target ** 456 ahd_linux_target_in_softc(struct scsi_target *starget) 457 { 458 struct ahd_softc *ahd = 459 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 460 unsigned int target_offset; 461 462 target_offset = starget->id; 463 if (starget->channel != 0) 464 target_offset += 8; 465 466 return &ahd->platform_data->starget[target_offset]; 467 } 468 469 static int 470 ahd_linux_target_alloc(struct scsi_target *starget) 471 { 472 struct ahd_softc *ahd = 473 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 474 unsigned long flags; 475 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 476 struct ahd_linux_target *targ = scsi_transport_target_data(starget); 477 struct ahd_devinfo devinfo; 478 struct ahd_initiator_tinfo *tinfo; 479 struct ahd_tmode_tstate *tstate; 480 char channel = starget->channel + 'A'; 481 482 ahd_lock(ahd, &flags); 483 484 BUG_ON(*ahd_targp != NULL); 485 486 *ahd_targp = starget; 487 memset(targ, 0, sizeof(*targ)); 488 489 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 490 starget->id, &tstate); 491 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id, 492 CAM_LUN_WILDCARD, channel, 493 ROLE_INITIATOR); 494 spi_min_period(starget) = AHD_SYNCRATE_MAX; /* We can do U320 */ 495 if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0) 496 spi_max_offset(starget) = MAX_OFFSET_PACED_BUG; 497 else 498 spi_max_offset(starget) = MAX_OFFSET_PACED; 499 spi_max_width(starget) = ahd->features & AHD_WIDE; 500 501 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, 502 AHD_TRANS_GOAL, /*paused*/FALSE); 503 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 504 AHD_TRANS_GOAL, /*paused*/FALSE); 505 ahd_unlock(ahd, &flags); 506 507 return 0; 508 } 509 510 static void 511 ahd_linux_target_destroy(struct scsi_target *starget) 512 { 513 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 514 515 *ahd_targp = NULL; 516 } 517 518 static int 519 ahd_linux_slave_alloc(struct scsi_device *sdev) 520 { 521 struct ahd_softc *ahd = 522 *((struct ahd_softc **)sdev->host->hostdata); 523 struct scsi_target *starget = sdev->sdev_target; 524 struct ahd_linux_target *targ = scsi_transport_target_data(starget); 525 struct ahd_linux_device *dev; 526 527 if (bootverbose) 528 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id); 529 530 BUG_ON(targ->sdev[sdev->lun] != NULL); 531 532 dev = scsi_transport_device_data(sdev); 533 memset(dev, 0, sizeof(*dev)); 534 535 /* 536 * We start out life using untagged 537 * transactions of which we allow one. 538 */ 539 dev->openings = 1; 540 541 /* 542 * Set maxtags to 0. This will be changed if we 543 * later determine that we are dealing with 544 * a tagged queuing capable device. 545 */ 546 dev->maxtags = 0; 547 548 targ->sdev[sdev->lun] = sdev; 549 550 return (0); 551 } 552 553 static int 554 ahd_linux_slave_configure(struct scsi_device *sdev) 555 { 556 struct ahd_softc *ahd; 557 558 ahd = *((struct ahd_softc **)sdev->host->hostdata); 559 if (bootverbose) 560 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 561 562 ahd_linux_device_queue_depth(sdev); 563 564 /* Initial Domain Validation */ 565 if (!spi_initial_dv(sdev->sdev_target)) 566 spi_dv_device(sdev); 567 568 return 0; 569 } 570 571 static void 572 ahd_linux_slave_destroy(struct scsi_device *sdev) 573 { 574 struct ahd_softc *ahd; 575 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 576 struct ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target); 577 578 ahd = *((struct ahd_softc **)sdev->host->hostdata); 579 if (bootverbose) 580 printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id); 581 582 BUG_ON(dev->active); 583 584 targ->sdev[sdev->lun] = NULL; 585 586 } 587 588 #if defined(__i386__) 589 /* 590 * Return the disk geometry for the given SCSI device. 591 */ 592 static int 593 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 594 sector_t capacity, int geom[]) 595 { 596 uint8_t *bh; 597 int heads; 598 int sectors; 599 int cylinders; 600 int ret; 601 int extended; 602 struct ahd_softc *ahd; 603 604 ahd = *((struct ahd_softc **)sdev->host->hostdata); 605 606 bh = scsi_bios_ptable(bdev); 607 if (bh) { 608 ret = scsi_partsize(bh, capacity, 609 &geom[2], &geom[0], &geom[1]); 610 kfree(bh); 611 if (ret != -1) 612 return (ret); 613 } 614 heads = 64; 615 sectors = 32; 616 cylinders = aic_sector_div(capacity, heads, sectors); 617 618 if (aic79xx_extended != 0) 619 extended = 1; 620 else 621 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 622 if (extended && cylinders >= 1024) { 623 heads = 255; 624 sectors = 63; 625 cylinders = aic_sector_div(capacity, heads, sectors); 626 } 627 geom[0] = heads; 628 geom[1] = sectors; 629 geom[2] = cylinders; 630 return (0); 631 } 632 #endif 633 634 /* 635 * Abort the current SCSI command(s). 636 */ 637 static int 638 ahd_linux_abort(struct scsi_cmnd *cmd) 639 { 640 int error; 641 642 error = ahd_linux_queue_recovery_cmd(cmd, SCB_ABORT); 643 if (error != 0) 644 printf("aic79xx_abort returns 0x%x\n", error); 645 return error; 646 } 647 648 /* 649 * Attempt to send a target reset message to the device that timed out. 650 */ 651 static int 652 ahd_linux_dev_reset(struct scsi_cmnd *cmd) 653 { 654 int error; 655 656 error = ahd_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); 657 if (error != 0) 658 printf("aic79xx_dev_reset returns 0x%x\n", error); 659 return error; 660 } 661 662 /* 663 * Reset the SCSI bus. 664 */ 665 static int 666 ahd_linux_bus_reset(struct scsi_cmnd *cmd) 667 { 668 struct ahd_softc *ahd; 669 u_long s; 670 int found; 671 672 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 673 #ifdef AHD_DEBUG 674 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 675 printf("%s: Bus reset called for cmd %p\n", 676 ahd_name(ahd), cmd); 677 #endif 678 ahd_lock(ahd, &s); 679 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 680 /*initiate reset*/TRUE); 681 ahd_unlock(ahd, &s); 682 683 if (bootverbose) 684 printf("%s: SCSI bus reset delivered. " 685 "%d SCBs aborted.\n", ahd_name(ahd), found); 686 687 return (SUCCESS); 688 } 689 690 struct scsi_host_template aic79xx_driver_template = { 691 .module = THIS_MODULE, 692 .name = "aic79xx", 693 .proc_name = "aic79xx", 694 .proc_info = ahd_linux_proc_info, 695 .info = ahd_linux_info, 696 .queuecommand = ahd_linux_queue, 697 .eh_abort_handler = ahd_linux_abort, 698 .eh_device_reset_handler = ahd_linux_dev_reset, 699 .eh_bus_reset_handler = ahd_linux_bus_reset, 700 #if defined(__i386__) 701 .bios_param = ahd_linux_biosparam, 702 #endif 703 .can_queue = AHD_MAX_QUEUE, 704 .this_id = -1, 705 .cmd_per_lun = 2, 706 .use_clustering = ENABLE_CLUSTERING, 707 .slave_alloc = ahd_linux_slave_alloc, 708 .slave_configure = ahd_linux_slave_configure, 709 .slave_destroy = ahd_linux_slave_destroy, 710 .target_alloc = ahd_linux_target_alloc, 711 .target_destroy = ahd_linux_target_destroy, 712 }; 713 714 /******************************** Bus DMA *************************************/ 715 int 716 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 717 bus_size_t alignment, bus_size_t boundary, 718 dma_addr_t lowaddr, dma_addr_t highaddr, 719 bus_dma_filter_t *filter, void *filterarg, 720 bus_size_t maxsize, int nsegments, 721 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 722 { 723 bus_dma_tag_t dmat; 724 725 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); 726 if (dmat == NULL) 727 return (ENOMEM); 728 729 /* 730 * Linux is very simplistic about DMA memory. For now don't 731 * maintain all specification information. Once Linux supplies 732 * better facilities for doing these operations, or the 733 * needs of this particular driver change, we might need to do 734 * more here. 735 */ 736 dmat->alignment = alignment; 737 dmat->boundary = boundary; 738 dmat->maxsize = maxsize; 739 *ret_tag = dmat; 740 return (0); 741 } 742 743 void 744 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 745 { 746 free(dmat, M_DEVBUF); 747 } 748 749 int 750 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 751 int flags, bus_dmamap_t *mapp) 752 { 753 *vaddr = pci_alloc_consistent(ahd->dev_softc, 754 dmat->maxsize, mapp); 755 if (*vaddr == NULL) 756 return (ENOMEM); 757 return(0); 758 } 759 760 void 761 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 762 void* vaddr, bus_dmamap_t map) 763 { 764 pci_free_consistent(ahd->dev_softc, dmat->maxsize, 765 vaddr, map); 766 } 767 768 int 769 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 770 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 771 void *cb_arg, int flags) 772 { 773 /* 774 * Assume for now that this will only be used during 775 * initialization and not for per-transaction buffer mapping. 776 */ 777 bus_dma_segment_t stack_sg; 778 779 stack_sg.ds_addr = map; 780 stack_sg.ds_len = dmat->maxsize; 781 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 782 return (0); 783 } 784 785 void 786 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 787 { 788 } 789 790 int 791 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 792 { 793 /* Nothing to do */ 794 return (0); 795 } 796 797 /********************* Platform Dependent Functions ***************************/ 798 /* 799 * Compare "left hand" softc with "right hand" softc, returning: 800 * < 0 - lahd has a lower priority than rahd 801 * 0 - Softcs are equal 802 * > 0 - lahd has a higher priority than rahd 803 */ 804 int 805 ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd) 806 { 807 int value; 808 809 /* 810 * Under Linux, cards are ordered as follows: 811 * 1) PCI devices that are marked as the boot controller. 812 * 2) PCI devices with BIOS enabled sorted by bus/slot/func. 813 * 3) All remaining PCI devices sorted by bus/slot/func. 814 */ 815 #if 0 816 value = (lahd->flags & AHD_BOOT_CHANNEL) 817 - (rahd->flags & AHD_BOOT_CHANNEL); 818 if (value != 0) 819 /* Controllers set for boot have a *higher* priority */ 820 return (value); 821 #endif 822 823 value = (lahd->flags & AHD_BIOS_ENABLED) 824 - (rahd->flags & AHD_BIOS_ENABLED); 825 if (value != 0) 826 /* Controllers with BIOS enabled have a *higher* priority */ 827 return (value); 828 829 /* Still equal. Sort by bus/slot/func. */ 830 if (aic79xx_reverse_scan != 0) 831 value = ahd_get_pci_bus(lahd->dev_softc) 832 - ahd_get_pci_bus(rahd->dev_softc); 833 else 834 value = ahd_get_pci_bus(rahd->dev_softc) 835 - ahd_get_pci_bus(lahd->dev_softc); 836 if (value != 0) 837 return (value); 838 if (aic79xx_reverse_scan != 0) 839 value = ahd_get_pci_slot(lahd->dev_softc) 840 - ahd_get_pci_slot(rahd->dev_softc); 841 else 842 value = ahd_get_pci_slot(rahd->dev_softc) 843 - ahd_get_pci_slot(lahd->dev_softc); 844 if (value != 0) 845 return (value); 846 847 value = rahd->channel - lahd->channel; 848 return (value); 849 } 850 851 static void 852 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 853 { 854 855 if ((instance >= 0) 856 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) { 857 uint8_t *iocell_info; 858 859 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 860 iocell_info[index] = value & 0xFFFF; 861 if (bootverbose) 862 printf("iocell[%d:%ld] = %d\n", instance, index, value); 863 } 864 } 865 866 static void 867 ahd_linux_setup_tag_info_global(char *p) 868 { 869 int tags, i, j; 870 871 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 872 printf("Setting Global Tags= %d\n", tags); 873 874 for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) { 875 for (j = 0; j < AHD_NUM_TARGETS; j++) { 876 aic79xx_tag_info[i].tag_commands[j] = tags; 877 } 878 } 879 } 880 881 static void 882 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 883 { 884 885 if ((instance >= 0) && (targ >= 0) 886 && (instance < NUM_ELEMENTS(aic79xx_tag_info)) 887 && (targ < AHD_NUM_TARGETS)) { 888 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 889 if (bootverbose) 890 printf("tag_info[%d:%d] = %d\n", instance, targ, value); 891 } 892 } 893 894 static char * 895 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 896 void (*callback)(u_long, int, int, int32_t), 897 u_long callback_arg) 898 { 899 char *tok_end; 900 char *tok_end2; 901 int i; 902 int instance; 903 int targ; 904 int done; 905 char tok_list[] = {'.', ',', '{', '}', '\0'}; 906 907 /* All options use a ':' name/arg separator */ 908 if (*opt_arg != ':') 909 return (opt_arg); 910 opt_arg++; 911 instance = -1; 912 targ = -1; 913 done = FALSE; 914 /* 915 * Restore separator that may be in 916 * the middle of our option argument. 917 */ 918 tok_end = strchr(opt_arg, '\0'); 919 if (tok_end < end) 920 *tok_end = ','; 921 while (!done) { 922 switch (*opt_arg) { 923 case '{': 924 if (instance == -1) { 925 instance = 0; 926 } else { 927 if (depth > 1) { 928 if (targ == -1) 929 targ = 0; 930 } else { 931 printf("Malformed Option %s\n", 932 opt_name); 933 done = TRUE; 934 } 935 } 936 opt_arg++; 937 break; 938 case '}': 939 if (targ != -1) 940 targ = -1; 941 else if (instance != -1) 942 instance = -1; 943 opt_arg++; 944 break; 945 case ',': 946 case '.': 947 if (instance == -1) 948 done = TRUE; 949 else if (targ >= 0) 950 targ++; 951 else if (instance >= 0) 952 instance++; 953 opt_arg++; 954 break; 955 case '\0': 956 done = TRUE; 957 break; 958 default: 959 tok_end = end; 960 for (i = 0; tok_list[i]; i++) { 961 tok_end2 = strchr(opt_arg, tok_list[i]); 962 if ((tok_end2) && (tok_end2 < tok_end)) 963 tok_end = tok_end2; 964 } 965 callback(callback_arg, instance, targ, 966 simple_strtol(opt_arg, NULL, 0)); 967 opt_arg = tok_end; 968 break; 969 } 970 } 971 return (opt_arg); 972 } 973 974 /* 975 * Handle Linux boot parameters. This routine allows for assigning a value 976 * to a parameter with a ':' between the parameter and the value. 977 * ie. aic79xx=stpwlev:1,extended 978 */ 979 static int 980 aic79xx_setup(char *s) 981 { 982 int i, n; 983 char *p; 984 char *end; 985 986 static struct { 987 const char *name; 988 uint32_t *flag; 989 } options[] = { 990 { "extended", &aic79xx_extended }, 991 { "no_reset", &aic79xx_no_reset }, 992 { "verbose", &aic79xx_verbose }, 993 { "allow_memio", &aic79xx_allow_memio}, 994 #ifdef AHD_DEBUG 995 { "debug", &ahd_debug }, 996 #endif 997 { "reverse_scan", &aic79xx_reverse_scan }, 998 { "periodic_otag", &aic79xx_periodic_otag }, 999 { "pci_parity", &aic79xx_pci_parity }, 1000 { "seltime", &aic79xx_seltime }, 1001 { "tag_info", NULL }, 1002 { "global_tag_depth", NULL}, 1003 { "slewrate", NULL }, 1004 { "precomp", NULL }, 1005 { "amplitude", NULL }, 1006 }; 1007 1008 end = strchr(s, '\0'); 1009 1010 /* 1011 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS 1012 * will never be 0 in this case. 1013 */ 1014 n = 0; 1015 1016 while ((p = strsep(&s, ",.")) != NULL) { 1017 if (*p == '\0') 1018 continue; 1019 for (i = 0; i < NUM_ELEMENTS(options); i++) { 1020 1021 n = strlen(options[i].name); 1022 if (strncmp(options[i].name, p, n) == 0) 1023 break; 1024 } 1025 if (i == NUM_ELEMENTS(options)) 1026 continue; 1027 1028 if (strncmp(p, "global_tag_depth", n) == 0) { 1029 ahd_linux_setup_tag_info_global(p + n); 1030 } else if (strncmp(p, "tag_info", n) == 0) { 1031 s = ahd_parse_brace_option("tag_info", p + n, end, 1032 2, ahd_linux_setup_tag_info, 0); 1033 } else if (strncmp(p, "slewrate", n) == 0) { 1034 s = ahd_parse_brace_option("slewrate", 1035 p + n, end, 1, ahd_linux_setup_iocell_info, 1036 AIC79XX_SLEWRATE_INDEX); 1037 } else if (strncmp(p, "precomp", n) == 0) { 1038 s = ahd_parse_brace_option("precomp", 1039 p + n, end, 1, ahd_linux_setup_iocell_info, 1040 AIC79XX_PRECOMP_INDEX); 1041 } else if (strncmp(p, "amplitude", n) == 0) { 1042 s = ahd_parse_brace_option("amplitude", 1043 p + n, end, 1, ahd_linux_setup_iocell_info, 1044 AIC79XX_AMPLITUDE_INDEX); 1045 } else if (p[n] == ':') { 1046 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1047 } else if (!strncmp(p, "verbose", n)) { 1048 *(options[i].flag) = 1; 1049 } else { 1050 *(options[i].flag) ^= 0xFFFFFFFF; 1051 } 1052 } 1053 return 1; 1054 } 1055 1056 __setup("aic79xx=", aic79xx_setup); 1057 1058 uint32_t aic79xx_verbose; 1059 1060 int 1061 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1062 { 1063 char buf[80]; 1064 struct Scsi_Host *host; 1065 char *new_name; 1066 u_long s; 1067 1068 template->name = ahd->description; 1069 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1070 if (host == NULL) 1071 return (ENOMEM); 1072 1073 *((struct ahd_softc **)host->hostdata) = ahd; 1074 ahd_lock(ahd, &s); 1075 ahd->platform_data->host = host; 1076 host->can_queue = AHD_MAX_QUEUE; 1077 host->cmd_per_lun = 2; 1078 host->sg_tablesize = AHD_NSEG; 1079 host->this_id = ahd->our_id; 1080 host->irq = ahd->platform_data->irq; 1081 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1082 host->max_lun = AHD_NUM_LUNS; 1083 host->max_channel = 0; 1084 host->sg_tablesize = AHD_NSEG; 1085 ahd_set_unit(ahd, ahd_linux_unit++); 1086 sprintf(buf, "scsi%d", host->host_no); 1087 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 1088 if (new_name != NULL) { 1089 strcpy(new_name, buf); 1090 ahd_set_name(ahd, new_name); 1091 } 1092 host->unique_id = ahd->unit; 1093 ahd_linux_initialize_scsi_bus(ahd); 1094 ahd_intr_enable(ahd, TRUE); 1095 ahd_unlock(ahd, &s); 1096 1097 host->transportt = ahd_linux_transport_template; 1098 1099 scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */ 1100 scsi_scan_host(host); 1101 return (0); 1102 } 1103 1104 uint64_t 1105 ahd_linux_get_memsize(void) 1106 { 1107 struct sysinfo si; 1108 1109 si_meminfo(&si); 1110 return ((uint64_t)si.totalram << PAGE_SHIFT); 1111 } 1112 1113 /* 1114 * Place the SCSI bus into a known state by either resetting it, 1115 * or forcing transfer negotiations on the next command to any 1116 * target. 1117 */ 1118 static void 1119 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1120 { 1121 u_int target_id; 1122 u_int numtarg; 1123 1124 target_id = 0; 1125 numtarg = 0; 1126 1127 if (aic79xx_no_reset != 0) 1128 ahd->flags &= ~AHD_RESET_BUS_A; 1129 1130 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1131 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1132 else 1133 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1134 1135 /* 1136 * Force negotiation to async for all targets that 1137 * will not see an initial bus reset. 1138 */ 1139 for (; target_id < numtarg; target_id++) { 1140 struct ahd_devinfo devinfo; 1141 struct ahd_initiator_tinfo *tinfo; 1142 struct ahd_tmode_tstate *tstate; 1143 1144 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1145 target_id, &tstate); 1146 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1147 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1148 ahd_update_neg_request(ahd, &devinfo, tstate, 1149 tinfo, AHD_NEG_ALWAYS); 1150 } 1151 /* Give the bus some time to recover */ 1152 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1153 ahd_freeze_simq(ahd); 1154 init_timer(&ahd->platform_data->reset_timer); 1155 ahd->platform_data->reset_timer.data = (u_long)ahd; 1156 ahd->platform_data->reset_timer.expires = 1157 jiffies + (AIC79XX_RESET_DELAY * HZ)/1000; 1158 ahd->platform_data->reset_timer.function = 1159 (ahd_linux_callback_t *)ahd_release_simq; 1160 add_timer(&ahd->platform_data->reset_timer); 1161 } 1162 } 1163 1164 int 1165 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1166 { 1167 ahd->platform_data = 1168 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT); 1169 if (ahd->platform_data == NULL) 1170 return (ENOMEM); 1171 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data)); 1172 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1173 ahd_lockinit(ahd); 1174 init_MUTEX_LOCKED(&ahd->platform_data->eh_sem); 1175 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1176 return (0); 1177 } 1178 1179 void 1180 ahd_platform_free(struct ahd_softc *ahd) 1181 { 1182 struct scsi_target *starget; 1183 int i, j; 1184 1185 if (ahd->platform_data != NULL) { 1186 /* destroy all of the device and target objects */ 1187 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1188 starget = ahd->platform_data->starget[i]; 1189 if (starget != NULL) { 1190 for (j = 0; j < AHD_NUM_LUNS; j++) { 1191 struct ahd_linux_target *targ = 1192 scsi_transport_target_data(starget); 1193 if (targ->sdev[j] == NULL) 1194 continue; 1195 targ->sdev[j] = NULL; 1196 } 1197 ahd->platform_data->starget[i] = NULL; 1198 } 1199 } 1200 1201 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1202 free_irq(ahd->platform_data->irq, ahd); 1203 if (ahd->tags[0] == BUS_SPACE_PIO 1204 && ahd->bshs[0].ioport != 0) 1205 release_region(ahd->bshs[0].ioport, 256); 1206 if (ahd->tags[1] == BUS_SPACE_PIO 1207 && ahd->bshs[1].ioport != 0) 1208 release_region(ahd->bshs[1].ioport, 256); 1209 if (ahd->tags[0] == BUS_SPACE_MEMIO 1210 && ahd->bshs[0].maddr != NULL) { 1211 iounmap(ahd->bshs[0].maddr); 1212 release_mem_region(ahd->platform_data->mem_busaddr, 1213 0x1000); 1214 } 1215 if (ahd->platform_data->host) 1216 scsi_host_put(ahd->platform_data->host); 1217 1218 free(ahd->platform_data, M_DEVBUF); 1219 } 1220 } 1221 1222 void 1223 ahd_platform_init(struct ahd_softc *ahd) 1224 { 1225 /* 1226 * Lookup and commit any modified IO Cell options. 1227 */ 1228 if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) { 1229 struct ahd_linux_iocell_opts *iocell_opts; 1230 1231 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1232 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1233 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1234 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1235 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1236 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1237 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1238 } 1239 1240 } 1241 1242 void 1243 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1244 { 1245 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1246 SCB_GET_CHANNEL(ahd, scb), 1247 SCB_GET_LUN(scb), SCB_LIST_NULL, 1248 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1249 } 1250 1251 void 1252 ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, 1253 ahd_queue_alg alg) 1254 { 1255 struct scsi_target *starget; 1256 struct ahd_linux_target *targ; 1257 struct ahd_linux_device *dev; 1258 struct scsi_device *sdev; 1259 int was_queuing; 1260 int now_queuing; 1261 1262 starget = ahd->platform_data->starget[devinfo->target]; 1263 targ = scsi_transport_target_data(starget); 1264 BUG_ON(targ == NULL); 1265 sdev = targ->sdev[devinfo->lun]; 1266 if (sdev == NULL) 1267 return; 1268 1269 dev = scsi_transport_device_data(sdev); 1270 1271 if (dev == NULL) 1272 return; 1273 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1274 switch (alg) { 1275 default: 1276 case AHD_QUEUE_NONE: 1277 now_queuing = 0; 1278 break; 1279 case AHD_QUEUE_BASIC: 1280 now_queuing = AHD_DEV_Q_BASIC; 1281 break; 1282 case AHD_QUEUE_TAGGED: 1283 now_queuing = AHD_DEV_Q_TAGGED; 1284 break; 1285 } 1286 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1287 && (was_queuing != now_queuing) 1288 && (dev->active != 0)) { 1289 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1290 dev->qfrozen++; 1291 } 1292 1293 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1294 if (now_queuing) { 1295 u_int usertags; 1296 1297 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1298 if (!was_queuing) { 1299 /* 1300 * Start out agressively and allow our 1301 * dynamic queue depth algorithm to take 1302 * care of the rest. 1303 */ 1304 dev->maxtags = usertags; 1305 dev->openings = dev->maxtags - dev->active; 1306 } 1307 if (dev->maxtags == 0) { 1308 /* 1309 * Queueing is disabled by the user. 1310 */ 1311 dev->openings = 1; 1312 } else if (alg == AHD_QUEUE_TAGGED) { 1313 dev->flags |= AHD_DEV_Q_TAGGED; 1314 if (aic79xx_periodic_otag != 0) 1315 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1316 } else 1317 dev->flags |= AHD_DEV_Q_BASIC; 1318 } else { 1319 /* We can only have one opening. */ 1320 dev->maxtags = 0; 1321 dev->openings = 1 - dev->active; 1322 } 1323 1324 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1325 case AHD_DEV_Q_BASIC: 1326 scsi_adjust_queue_depth(sdev, 1327 MSG_SIMPLE_TASK, 1328 dev->openings + dev->active); 1329 break; 1330 case AHD_DEV_Q_TAGGED: 1331 scsi_adjust_queue_depth(sdev, 1332 MSG_ORDERED_TASK, 1333 dev->openings + dev->active); 1334 break; 1335 default: 1336 /* 1337 * We allow the OS to queue 2 untagged transactions to 1338 * us at any time even though we can only execute them 1339 * serially on the controller/device. This should 1340 * remove some latency. 1341 */ 1342 scsi_adjust_queue_depth(sdev, 1343 /*NON-TAGGED*/0, 1344 /*queue depth*/2); 1345 break; 1346 } 1347 } 1348 1349 int 1350 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1351 int lun, u_int tag, role_t role, uint32_t status) 1352 { 1353 return 0; 1354 } 1355 1356 static u_int 1357 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1358 { 1359 static int warned_user; 1360 u_int tags; 1361 1362 tags = 0; 1363 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1364 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) { 1365 1366 if (warned_user == 0) { 1367 printf(KERN_WARNING 1368 "aic79xx: WARNING: Insufficient tag_info instances\n" 1369 "aic79xx: for installed controllers. Using defaults\n" 1370 "aic79xx: Please update the aic79xx_tag_info array in\n" 1371 "aic79xx: the aic79xx_osm.c source file.\n"); 1372 warned_user++; 1373 } 1374 tags = AHD_MAX_QUEUE; 1375 } else { 1376 adapter_tag_info_t *tag_info; 1377 1378 tag_info = &aic79xx_tag_info[ahd->unit]; 1379 tags = tag_info->tag_commands[devinfo->target_offset]; 1380 if (tags > AHD_MAX_QUEUE) 1381 tags = AHD_MAX_QUEUE; 1382 } 1383 } 1384 return (tags); 1385 } 1386 1387 /* 1388 * Determines the queue depth for a given device. 1389 */ 1390 static void 1391 ahd_linux_device_queue_depth(struct scsi_device *sdev) 1392 { 1393 struct ahd_devinfo devinfo; 1394 u_int tags; 1395 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1396 1397 ahd_compile_devinfo(&devinfo, 1398 ahd->our_id, 1399 sdev->sdev_target->id, sdev->lun, 1400 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1401 ROLE_INITIATOR); 1402 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1403 if (tags != 0 && sdev->tagged_supported != 0) { 1404 1405 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED); 1406 ahd_print_devinfo(ahd, &devinfo); 1407 printf("Tagged Queuing enabled. Depth %d\n", tags); 1408 } else { 1409 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE); 1410 } 1411 } 1412 1413 static int 1414 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1415 struct scsi_cmnd *cmd) 1416 { 1417 struct scb *scb; 1418 struct hardware_scb *hscb; 1419 struct ahd_initiator_tinfo *tinfo; 1420 struct ahd_tmode_tstate *tstate; 1421 u_int col_idx; 1422 uint16_t mask; 1423 1424 /* 1425 * Get an scb to use. 1426 */ 1427 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1428 cmd->device->id, &tstate); 1429 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1430 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1431 col_idx = AHD_NEVER_COL_IDX; 1432 } else { 1433 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1434 cmd->device->lun); 1435 } 1436 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1437 ahd->flags |= AHD_RESOURCE_SHORTAGE; 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 if (cmd->use_sg != 0) { 1493 void *sg; 1494 struct scatterlist *cur_seg; 1495 u_int nseg; 1496 int dir; 1497 1498 cur_seg = (struct scatterlist *)cmd->request_buffer; 1499 dir = cmd->sc_data_direction; 1500 nseg = pci_map_sg(ahd->dev_softc, cur_seg, 1501 cmd->use_sg, dir); 1502 scb->platform_data->xfer_len = 0; 1503 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) { 1504 dma_addr_t addr; 1505 bus_size_t len; 1506 1507 addr = sg_dma_address(cur_seg); 1508 len = sg_dma_len(cur_seg); 1509 scb->platform_data->xfer_len += len; 1510 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1511 /*last*/nseg == 1); 1512 } 1513 } else if (cmd->request_bufflen != 0) { 1514 void *sg; 1515 dma_addr_t addr; 1516 int dir; 1517 1518 sg = scb->sg_list; 1519 dir = cmd->sc_data_direction; 1520 addr = pci_map_single(ahd->dev_softc, 1521 cmd->request_buffer, 1522 cmd->request_bufflen, dir); 1523 scb->platform_data->xfer_len = cmd->request_bufflen; 1524 scb->platform_data->buf_busaddr = addr; 1525 sg = ahd_sg_setup(ahd, scb, sg, addr, 1526 cmd->request_bufflen, /*last*/TRUE); 1527 } 1528 1529 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1530 dev->openings--; 1531 dev->active++; 1532 dev->commands_issued++; 1533 1534 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1535 dev->commands_since_idle_or_otag++; 1536 scb->flags |= SCB_ACTIVE; 1537 ahd_queue_scb(ahd, scb); 1538 1539 return 0; 1540 } 1541 1542 /* 1543 * SCSI controller interrupt handler. 1544 */ 1545 irqreturn_t 1546 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs) 1547 { 1548 struct ahd_softc *ahd; 1549 u_long flags; 1550 int ours; 1551 1552 ahd = (struct ahd_softc *) dev_id; 1553 ahd_lock(ahd, &flags); 1554 ours = ahd_intr(ahd); 1555 ahd_unlock(ahd, &flags); 1556 return IRQ_RETVAL(ours); 1557 } 1558 1559 void 1560 ahd_platform_flushwork(struct ahd_softc *ahd) 1561 { 1562 1563 } 1564 1565 void 1566 ahd_send_async(struct ahd_softc *ahd, char channel, 1567 u_int target, u_int lun, ac_code code, void *arg) 1568 { 1569 switch (code) { 1570 case AC_TRANSFER_NEG: 1571 { 1572 char buf[80]; 1573 struct scsi_target *starget; 1574 struct ahd_linux_target *targ; 1575 struct info_str info; 1576 struct ahd_initiator_tinfo *tinfo; 1577 struct ahd_tmode_tstate *tstate; 1578 unsigned int target_ppr_options; 1579 1580 BUG_ON(target == CAM_TARGET_WILDCARD); 1581 1582 info.buffer = buf; 1583 info.length = sizeof(buf); 1584 info.offset = 0; 1585 info.pos = 0; 1586 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1587 target, &tstate); 1588 1589 /* 1590 * Don't bother reporting results while 1591 * negotiations are still pending. 1592 */ 1593 if (tinfo->curr.period != tinfo->goal.period 1594 || tinfo->curr.width != tinfo->goal.width 1595 || tinfo->curr.offset != tinfo->goal.offset 1596 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1597 if (bootverbose == 0) 1598 break; 1599 1600 /* 1601 * Don't bother reporting results that 1602 * are identical to those last reported. 1603 */ 1604 starget = ahd->platform_data->starget[target]; 1605 if (starget == NULL) 1606 break; 1607 targ = scsi_transport_target_data(starget); 1608 1609 target_ppr_options = 1610 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1611 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1612 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1613 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1614 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1615 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1616 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1617 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1618 1619 if (tinfo->curr.period == spi_period(starget) 1620 && tinfo->curr.width == spi_width(starget) 1621 && tinfo->curr.offset == spi_offset(starget) 1622 && tinfo->curr.ppr_options == target_ppr_options) 1623 if (bootverbose == 0) 1624 break; 1625 1626 spi_period(starget) = tinfo->curr.period; 1627 spi_width(starget) = tinfo->curr.width; 1628 spi_offset(starget) = tinfo->curr.offset; 1629 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1630 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1631 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1632 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1633 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1634 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1635 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1636 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1637 spi_display_xfer_agreement(starget); 1638 break; 1639 } 1640 case AC_SENT_BDR: 1641 { 1642 WARN_ON(lun != CAM_LUN_WILDCARD); 1643 scsi_report_device_reset(ahd->platform_data->host, 1644 channel - 'A', target); 1645 break; 1646 } 1647 case AC_BUS_RESET: 1648 if (ahd->platform_data->host != NULL) { 1649 scsi_report_bus_reset(ahd->platform_data->host, 1650 channel - 'A'); 1651 } 1652 break; 1653 default: 1654 panic("ahd_send_async: Unexpected async event"); 1655 } 1656 } 1657 1658 /* 1659 * Calls the higher level scsi done function and frees the scb. 1660 */ 1661 void 1662 ahd_done(struct ahd_softc *ahd, struct scb *scb) 1663 { 1664 struct scsi_cmnd *cmd; 1665 struct ahd_linux_device *dev; 1666 1667 if ((scb->flags & SCB_ACTIVE) == 0) { 1668 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1669 ahd_dump_card_state(ahd); 1670 panic("Stopping for safety"); 1671 } 1672 LIST_REMOVE(scb, pending_links); 1673 cmd = scb->io_ctx; 1674 dev = scb->platform_data->dev; 1675 dev->active--; 1676 dev->openings++; 1677 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1678 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1679 dev->qfrozen--; 1680 } 1681 ahd_linux_unmap_scb(ahd, scb); 1682 1683 /* 1684 * Guard against stale sense data. 1685 * The Linux mid-layer assumes that sense 1686 * was retrieved anytime the first byte of 1687 * the sense buffer looks "sane". 1688 */ 1689 cmd->sense_buffer[0] = 0; 1690 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1691 uint32_t amount_xferred; 1692 1693 amount_xferred = 1694 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1695 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1696 #ifdef AHD_DEBUG 1697 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1698 ahd_print_path(ahd, scb); 1699 printf("Set CAM_UNCOR_PARITY\n"); 1700 } 1701 #endif 1702 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1703 #ifdef AHD_REPORT_UNDERFLOWS 1704 /* 1705 * This code is disabled by default as some 1706 * clients of the SCSI system do not properly 1707 * initialize the underflow parameter. This 1708 * results in spurious termination of commands 1709 * that complete as expected (e.g. underflow is 1710 * allowed as command can return variable amounts 1711 * of data. 1712 */ 1713 } else if (amount_xferred < scb->io_ctx->underflow) { 1714 u_int i; 1715 1716 ahd_print_path(ahd, scb); 1717 printf("CDB:"); 1718 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1719 printf(" 0x%x", scb->io_ctx->cmnd[i]); 1720 printf("\n"); 1721 ahd_print_path(ahd, scb); 1722 printf("Saw underflow (%ld of %ld bytes). " 1723 "Treated as error\n", 1724 ahd_get_residual(scb), 1725 ahd_get_transfer_length(scb)); 1726 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1727 #endif 1728 } else { 1729 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1730 } 1731 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1732 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1733 } 1734 1735 if (dev->openings == 1 1736 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1737 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1738 dev->tag_success_count++; 1739 /* 1740 * Some devices deal with temporary internal resource 1741 * shortages by returning queue full. When the queue 1742 * full occurrs, we throttle back. Slowly try to get 1743 * back to our previous queue depth. 1744 */ 1745 if ((dev->openings + dev->active) < dev->maxtags 1746 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1747 dev->tag_success_count = 0; 1748 dev->openings++; 1749 } 1750 1751 if (dev->active == 0) 1752 dev->commands_since_idle_or_otag = 0; 1753 1754 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1755 printf("Recovery SCB completes\n"); 1756 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1757 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1758 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1759 if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) { 1760 ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM; 1761 up(&ahd->platform_data->eh_sem); 1762 } 1763 } 1764 1765 ahd_free_scb(ahd, scb); 1766 ahd_linux_queue_cmd_complete(ahd, cmd); 1767 } 1768 1769 static void 1770 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1771 struct scsi_device *sdev, struct scb *scb) 1772 { 1773 struct ahd_devinfo devinfo; 1774 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1775 1776 ahd_compile_devinfo(&devinfo, 1777 ahd->our_id, 1778 sdev->sdev_target->id, sdev->lun, 1779 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1780 ROLE_INITIATOR); 1781 1782 /* 1783 * We don't currently trust the mid-layer to 1784 * properly deal with queue full or busy. So, 1785 * when one occurs, we tell the mid-layer to 1786 * unconditionally requeue the command to us 1787 * so that we can retry it ourselves. We also 1788 * implement our own throttling mechanism so 1789 * we don't clobber the device with too many 1790 * commands. 1791 */ 1792 switch (ahd_get_scsi_status(scb)) { 1793 default: 1794 break; 1795 case SCSI_STATUS_CHECK_COND: 1796 case SCSI_STATUS_CMD_TERMINATED: 1797 { 1798 struct scsi_cmnd *cmd; 1799 1800 /* 1801 * Copy sense information to the OS's cmd 1802 * structure if it is available. 1803 */ 1804 cmd = scb->io_ctx; 1805 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1806 struct scsi_status_iu_header *siu; 1807 u_int sense_size; 1808 u_int sense_offset; 1809 1810 if (scb->flags & SCB_SENSE) { 1811 sense_size = MIN(sizeof(struct scsi_sense_data) 1812 - ahd_get_sense_residual(scb), 1813 sizeof(cmd->sense_buffer)); 1814 sense_offset = 0; 1815 } else { 1816 /* 1817 * Copy only the sense data into the provided 1818 * buffer. 1819 */ 1820 siu = (struct scsi_status_iu_header *) 1821 scb->sense_data; 1822 sense_size = MIN(scsi_4btoul(siu->sense_length), 1823 sizeof(cmd->sense_buffer)); 1824 sense_offset = SIU_SENSE_OFFSET(siu); 1825 } 1826 1827 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); 1828 memcpy(cmd->sense_buffer, 1829 ahd_get_sense_buf(ahd, scb) 1830 + sense_offset, sense_size); 1831 cmd->result |= (DRIVER_SENSE << 24); 1832 1833 #ifdef AHD_DEBUG 1834 if (ahd_debug & AHD_SHOW_SENSE) { 1835 int i; 1836 1837 printf("Copied %d bytes of sense data at %d:", 1838 sense_size, sense_offset); 1839 for (i = 0; i < sense_size; i++) { 1840 if ((i & 0xF) == 0) 1841 printf("\n"); 1842 printf("0x%x ", cmd->sense_buffer[i]); 1843 } 1844 printf("\n"); 1845 } 1846 #endif 1847 } 1848 break; 1849 } 1850 case SCSI_STATUS_QUEUE_FULL: 1851 /* 1852 * By the time the core driver has returned this 1853 * command, all other commands that were queued 1854 * to us but not the device have been returned. 1855 * This ensures that dev->active is equal to 1856 * the number of commands actually queued to 1857 * the device. 1858 */ 1859 dev->tag_success_count = 0; 1860 if (dev->active != 0) { 1861 /* 1862 * Drop our opening count to the number 1863 * of commands currently outstanding. 1864 */ 1865 dev->openings = 0; 1866 #ifdef AHD_DEBUG 1867 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1868 ahd_print_path(ahd, scb); 1869 printf("Dropping tag count to %d\n", 1870 dev->active); 1871 } 1872 #endif 1873 if (dev->active == dev->tags_on_last_queuefull) { 1874 1875 dev->last_queuefull_same_count++; 1876 /* 1877 * If we repeatedly see a queue full 1878 * at the same queue depth, this 1879 * device has a fixed number of tag 1880 * slots. Lock in this tag depth 1881 * so we stop seeing queue fulls from 1882 * this device. 1883 */ 1884 if (dev->last_queuefull_same_count 1885 == AHD_LOCK_TAGS_COUNT) { 1886 dev->maxtags = dev->active; 1887 ahd_print_path(ahd, scb); 1888 printf("Locking max tag count at %d\n", 1889 dev->active); 1890 } 1891 } else { 1892 dev->tags_on_last_queuefull = dev->active; 1893 dev->last_queuefull_same_count = 0; 1894 } 1895 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 1896 ahd_set_scsi_status(scb, SCSI_STATUS_OK); 1897 ahd_platform_set_tags(ahd, &devinfo, 1898 (dev->flags & AHD_DEV_Q_BASIC) 1899 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 1900 break; 1901 } 1902 /* 1903 * Drop down to a single opening, and treat this 1904 * as if the target returned BUSY SCSI status. 1905 */ 1906 dev->openings = 1; 1907 ahd_platform_set_tags(ahd, &devinfo, 1908 (dev->flags & AHD_DEV_Q_BASIC) 1909 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 1910 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); 1911 } 1912 } 1913 1914 static void 1915 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 1916 { 1917 /* 1918 * Map CAM error codes into Linux Error codes. We 1919 * avoid the conversion so that the DV code has the 1920 * full error information available when making 1921 * state change decisions. 1922 */ 1923 { 1924 uint32_t status; 1925 u_int new_status; 1926 1927 status = ahd_cmd_get_transaction_status(cmd); 1928 switch (status) { 1929 case CAM_REQ_INPROG: 1930 case CAM_REQ_CMP: 1931 case CAM_SCSI_STATUS_ERROR: 1932 new_status = DID_OK; 1933 break; 1934 case CAM_REQ_ABORTED: 1935 new_status = DID_ABORT; 1936 break; 1937 case CAM_BUSY: 1938 new_status = DID_BUS_BUSY; 1939 break; 1940 case CAM_REQ_INVALID: 1941 case CAM_PATH_INVALID: 1942 new_status = DID_BAD_TARGET; 1943 break; 1944 case CAM_SEL_TIMEOUT: 1945 new_status = DID_NO_CONNECT; 1946 break; 1947 case CAM_SCSI_BUS_RESET: 1948 case CAM_BDR_SENT: 1949 new_status = DID_RESET; 1950 break; 1951 case CAM_UNCOR_PARITY: 1952 new_status = DID_PARITY; 1953 break; 1954 case CAM_CMD_TIMEOUT: 1955 new_status = DID_TIME_OUT; 1956 break; 1957 case CAM_UA_ABORT: 1958 case CAM_REQ_CMP_ERR: 1959 case CAM_AUTOSENSE_FAIL: 1960 case CAM_NO_HBA: 1961 case CAM_DATA_RUN_ERR: 1962 case CAM_UNEXP_BUSFREE: 1963 case CAM_SEQUENCE_FAIL: 1964 case CAM_CCB_LEN_ERR: 1965 case CAM_PROVIDE_FAIL: 1966 case CAM_REQ_TERMIO: 1967 case CAM_UNREC_HBA_ERROR: 1968 case CAM_REQ_TOO_BIG: 1969 new_status = DID_ERROR; 1970 break; 1971 case CAM_REQUEUE_REQ: 1972 new_status = DID_REQUEUE; 1973 break; 1974 default: 1975 /* We should never get here */ 1976 new_status = DID_ERROR; 1977 break; 1978 } 1979 1980 ahd_cmd_set_transaction_status(cmd, new_status); 1981 } 1982 1983 cmd->scsi_done(cmd); 1984 } 1985 1986 static void 1987 ahd_linux_sem_timeout(u_long arg) 1988 { 1989 struct ahd_softc *ahd; 1990 u_long s; 1991 1992 ahd = (struct ahd_softc *)arg; 1993 1994 ahd_lock(ahd, &s); 1995 if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) { 1996 ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM; 1997 up(&ahd->platform_data->eh_sem); 1998 } 1999 ahd_unlock(ahd, &s); 2000 } 2001 2002 void 2003 ahd_freeze_simq(struct ahd_softc *ahd) 2004 { 2005 ahd->platform_data->qfrozen++; 2006 if (ahd->platform_data->qfrozen == 1) { 2007 scsi_block_requests(ahd->platform_data->host); 2008 ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS, 2009 CAM_LUN_WILDCARD, SCB_LIST_NULL, 2010 ROLE_INITIATOR, CAM_REQUEUE_REQ); 2011 } 2012 } 2013 2014 void 2015 ahd_release_simq(struct ahd_softc *ahd) 2016 { 2017 u_long s; 2018 int unblock_reqs; 2019 2020 unblock_reqs = 0; 2021 ahd_lock(ahd, &s); 2022 if (ahd->platform_data->qfrozen > 0) 2023 ahd->platform_data->qfrozen--; 2024 if (ahd->platform_data->qfrozen == 0) { 2025 unblock_reqs = 1; 2026 } 2027 ahd_unlock(ahd, &s); 2028 /* 2029 * There is still a race here. The mid-layer 2030 * should keep its own freeze count and use 2031 * a bottom half handler to run the queues 2032 * so we can unblock with our own lock held. 2033 */ 2034 if (unblock_reqs) 2035 scsi_unblock_requests(ahd->platform_data->host); 2036 } 2037 2038 static int 2039 ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) 2040 { 2041 struct ahd_softc *ahd; 2042 struct ahd_linux_device *dev; 2043 struct scb *pending_scb; 2044 u_int saved_scbptr; 2045 u_int active_scbptr; 2046 u_int last_phase; 2047 u_int saved_scsiid; 2048 u_int cdb_byte; 2049 int retval; 2050 int was_paused; 2051 int paused; 2052 int wait; 2053 int disconnected; 2054 ahd_mode_state saved_modes; 2055 unsigned long flags; 2056 2057 pending_scb = NULL; 2058 paused = FALSE; 2059 wait = FALSE; 2060 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2061 2062 scmd_printk(KERN_INFO, cmd, 2063 "Attempting to queue a%s message:", 2064 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); 2065 2066 printf("CDB:"); 2067 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2068 printf(" 0x%x", cmd->cmnd[cdb_byte]); 2069 printf("\n"); 2070 2071 ahd_lock(ahd, &flags); 2072 2073 /* 2074 * First determine if we currently own this command. 2075 * Start by searching the device queue. If not found 2076 * there, check the pending_scb list. If not found 2077 * at all, and the system wanted us to just abort the 2078 * command, return success. 2079 */ 2080 dev = scsi_transport_device_data(cmd->device); 2081 2082 if (dev == NULL) { 2083 /* 2084 * No target device for this command exists, 2085 * so we must not still own the command. 2086 */ 2087 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2088 retval = SUCCESS; 2089 goto no_cmd; 2090 } 2091 2092 /* 2093 * See if we can find a matching cmd in the pending list. 2094 */ 2095 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2096 if (pending_scb->io_ctx == cmd) 2097 break; 2098 } 2099 2100 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { 2101 2102 /* Any SCB for this device will do for a target reset */ 2103 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2104 if (ahd_match_scb(ahd, pending_scb, 2105 scmd_id(cmd), 2106 scmd_channel(cmd) + 'A', 2107 CAM_LUN_WILDCARD, 2108 SCB_LIST_NULL, ROLE_INITIATOR)) 2109 break; 2110 } 2111 } 2112 2113 if (pending_scb == NULL) { 2114 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2115 goto no_cmd; 2116 } 2117 2118 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2119 /* 2120 * We can't queue two recovery actions using the same SCB 2121 */ 2122 retval = FAILED; 2123 goto done; 2124 } 2125 2126 /* 2127 * Ensure that the card doesn't do anything 2128 * behind our back. Also make sure that we 2129 * didn't "just" miss an interrupt that would 2130 * affect this cmd. 2131 */ 2132 was_paused = ahd_is_paused(ahd); 2133 ahd_pause_and_flushwork(ahd); 2134 paused = TRUE; 2135 2136 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2137 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2138 goto no_cmd; 2139 } 2140 2141 printf("%s: At time of recovery, card was %spaused\n", 2142 ahd_name(ahd), was_paused ? "" : "not "); 2143 ahd_dump_card_state(ahd); 2144 2145 disconnected = TRUE; 2146 if (flag == SCB_ABORT) { 2147 if (ahd_search_qinfifo(ahd, cmd->device->id, 2148 cmd->device->channel + 'A', 2149 cmd->device->lun, 2150 pending_scb->hscb->tag, 2151 ROLE_INITIATOR, CAM_REQ_ABORTED, 2152 SEARCH_COMPLETE) > 0) { 2153 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2154 ahd_name(ahd), cmd->device->channel, 2155 cmd->device->id, cmd->device->lun); 2156 retval = SUCCESS; 2157 goto done; 2158 } 2159 } else if (ahd_search_qinfifo(ahd, cmd->device->id, 2160 cmd->device->channel + 'A', 2161 cmd->device->lun, pending_scb->hscb->tag, 2162 ROLE_INITIATOR, /*status*/0, 2163 SEARCH_COUNT) > 0) { 2164 disconnected = FALSE; 2165 } 2166 2167 saved_modes = ahd_save_modes(ahd); 2168 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2169 last_phase = ahd_inb(ahd, LASTPHASE); 2170 saved_scbptr = ahd_get_scbptr(ahd); 2171 active_scbptr = saved_scbptr; 2172 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2173 struct scb *bus_scb; 2174 2175 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2176 if (bus_scb == pending_scb) 2177 disconnected = FALSE; 2178 else if (flag != SCB_ABORT 2179 && ahd_inb(ahd, SAVED_SCSIID) == pending_scb->hscb->scsiid 2180 && ahd_inb(ahd, SAVED_LUN) == SCB_GET_LUN(pending_scb)) 2181 disconnected = FALSE; 2182 } 2183 2184 /* 2185 * At this point, pending_scb is the scb associated with the 2186 * passed in command. That command is currently active on the 2187 * bus or is in the disconnected state. 2188 */ 2189 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); 2190 if (last_phase != P_BUSFREE 2191 && (SCB_GET_TAG(pending_scb) == active_scbptr 2192 || (flag == SCB_DEVICE_RESET 2193 && SCSIID_TARGET(ahd, saved_scsiid) == scmd_id(cmd)))) { 2194 2195 /* 2196 * We're active on the bus, so assert ATN 2197 * and hope that the target responds. 2198 */ 2199 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2200 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2201 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2202 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2203 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2204 wait = TRUE; 2205 } else if (disconnected) { 2206 2207 /* 2208 * Actually re-queue this SCB in an attempt 2209 * to select the device before it reconnects. 2210 */ 2211 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2212 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2213 pending_scb->hscb->cdb_len = 0; 2214 pending_scb->hscb->task_attribute = 0; 2215 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2216 2217 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2218 /* 2219 * Mark the SCB has having an outstanding 2220 * task management function. Should the command 2221 * complete normally before the task management 2222 * function can be sent, the host will be notified 2223 * to abort our requeued SCB. 2224 */ 2225 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2226 pending_scb->hscb->task_management); 2227 } else { 2228 /* 2229 * If non-packetized, set the MK_MESSAGE control 2230 * bit indicating that we desire to send a message. 2231 * We also set the disconnected flag since there is 2232 * no guarantee that our SCB control byte matches 2233 * the version on the card. We don't want the 2234 * sequencer to abort the command thinking an 2235 * unsolicited reselection occurred. 2236 */ 2237 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2238 2239 /* 2240 * The sequencer will never re-reference the 2241 * in-core SCB. To make sure we are notified 2242 * during reslection, set the MK_MESSAGE flag in 2243 * the card's copy of the SCB. 2244 */ 2245 ahd_outb(ahd, SCB_CONTROL, 2246 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2247 } 2248 2249 /* 2250 * Clear out any entries in the QINFIFO first 2251 * so we are the next SCB for this target 2252 * to run. 2253 */ 2254 ahd_search_qinfifo(ahd, cmd->device->id, 2255 cmd->device->channel + 'A', cmd->device->lun, 2256 SCB_LIST_NULL, ROLE_INITIATOR, 2257 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2258 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2259 ahd_set_scbptr(ahd, saved_scbptr); 2260 ahd_print_path(ahd, pending_scb); 2261 printf("Device is disconnected, re-queuing SCB\n"); 2262 wait = TRUE; 2263 } else { 2264 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2265 retval = FAILED; 2266 goto done; 2267 } 2268 2269 no_cmd: 2270 /* 2271 * Our assumption is that if we don't have the command, no 2272 * recovery action was required, so we return success. Again, 2273 * the semantics of the mid-layer recovery engine are not 2274 * well defined, so this may change in time. 2275 */ 2276 retval = SUCCESS; 2277 done: 2278 if (paused) 2279 ahd_unpause(ahd); 2280 if (wait) { 2281 struct timer_list timer; 2282 int ret; 2283 2284 ahd->platform_data->flags |= AHD_SCB_UP_EH_SEM; 2285 ahd_unlock(ahd, &flags); 2286 2287 init_timer(&timer); 2288 timer.data = (u_long)ahd; 2289 timer.expires = jiffies + (5 * HZ); 2290 timer.function = ahd_linux_sem_timeout; 2291 add_timer(&timer); 2292 printf("Recovery code sleeping\n"); 2293 down(&ahd->platform_data->eh_sem); 2294 printf("Recovery code awake\n"); 2295 ret = del_timer_sync(&timer); 2296 if (ret == 0) { 2297 printf("Timer Expired\n"); 2298 retval = FAILED; 2299 } 2300 } 2301 ahd_unlock(ahd, &flags); 2302 return (retval); 2303 } 2304 2305 static void ahd_linux_set_width(struct scsi_target *starget, int width) 2306 { 2307 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2308 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2309 struct ahd_devinfo devinfo; 2310 unsigned long flags; 2311 2312 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2313 starget->channel + 'A', ROLE_INITIATOR); 2314 ahd_lock(ahd, &flags); 2315 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2316 ahd_unlock(ahd, &flags); 2317 } 2318 2319 static void ahd_linux_set_period(struct scsi_target *starget, int period) 2320 { 2321 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2322 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2323 struct ahd_tmode_tstate *tstate; 2324 struct ahd_initiator_tinfo *tinfo 2325 = ahd_fetch_transinfo(ahd, 2326 starget->channel + 'A', 2327 shost->this_id, starget->id, &tstate); 2328 struct ahd_devinfo devinfo; 2329 unsigned int ppr_options = tinfo->goal.ppr_options; 2330 unsigned int dt; 2331 unsigned long flags; 2332 unsigned long offset = tinfo->goal.offset; 2333 2334 #ifdef AHD_DEBUG 2335 if ((ahd_debug & AHD_SHOW_DV) != 0) 2336 printf("%s: set period to %d\n", ahd_name(ahd), period); 2337 #endif 2338 if (offset == 0) 2339 offset = MAX_OFFSET; 2340 2341 if (period < 8) 2342 period = 8; 2343 if (period < 10) { 2344 ppr_options |= MSG_EXT_PPR_DT_REQ; 2345 if (period == 8) 2346 ppr_options |= MSG_EXT_PPR_IU_REQ; 2347 } 2348 2349 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2350 2351 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2352 starget->channel + 'A', ROLE_INITIATOR); 2353 2354 /* all PPR requests apart from QAS require wide transfers */ 2355 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2356 if (spi_width(starget) == 0) 2357 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2358 } 2359 2360 ahd_find_syncrate(ahd, &period, &ppr_options, 2361 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2362 2363 ahd_lock(ahd, &flags); 2364 ahd_set_syncrate(ahd, &devinfo, period, offset, 2365 ppr_options, AHD_TRANS_GOAL, FALSE); 2366 ahd_unlock(ahd, &flags); 2367 } 2368 2369 static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2370 { 2371 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2372 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2373 struct ahd_tmode_tstate *tstate; 2374 struct ahd_initiator_tinfo *tinfo 2375 = ahd_fetch_transinfo(ahd, 2376 starget->channel + 'A', 2377 shost->this_id, starget->id, &tstate); 2378 struct ahd_devinfo devinfo; 2379 unsigned int ppr_options = 0; 2380 unsigned int period = 0; 2381 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2382 unsigned long flags; 2383 2384 #ifdef AHD_DEBUG 2385 if ((ahd_debug & AHD_SHOW_DV) != 0) 2386 printf("%s: set offset to %d\n", ahd_name(ahd), offset); 2387 #endif 2388 2389 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2390 starget->channel + 'A', ROLE_INITIATOR); 2391 if (offset != 0) { 2392 period = tinfo->goal.period; 2393 ppr_options = tinfo->goal.ppr_options; 2394 ahd_find_syncrate(ahd, &period, &ppr_options, 2395 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2396 } 2397 2398 ahd_lock(ahd, &flags); 2399 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2400 AHD_TRANS_GOAL, FALSE); 2401 ahd_unlock(ahd, &flags); 2402 } 2403 2404 static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2405 { 2406 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2407 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2408 struct ahd_tmode_tstate *tstate; 2409 struct ahd_initiator_tinfo *tinfo 2410 = ahd_fetch_transinfo(ahd, 2411 starget->channel + 'A', 2412 shost->this_id, starget->id, &tstate); 2413 struct ahd_devinfo devinfo; 2414 unsigned int ppr_options = tinfo->goal.ppr_options 2415 & ~MSG_EXT_PPR_DT_REQ; 2416 unsigned int period = tinfo->goal.period; 2417 unsigned int width = tinfo->goal.width; 2418 unsigned long flags; 2419 2420 #ifdef AHD_DEBUG 2421 if ((ahd_debug & AHD_SHOW_DV) != 0) 2422 printf("%s: %s DT\n", ahd_name(ahd), 2423 dt ? "enabling" : "disabling"); 2424 #endif 2425 if (dt) { 2426 ppr_options |= MSG_EXT_PPR_DT_REQ; 2427 if (!width) 2428 ahd_linux_set_width(starget, 1); 2429 } else { 2430 if (period <= 9) 2431 period = 10; /* If resetting DT, period must be >= 25ns */ 2432 /* IU is invalid without DT set */ 2433 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2434 } 2435 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2436 starget->channel + 'A', ROLE_INITIATOR); 2437 ahd_find_syncrate(ahd, &period, &ppr_options, 2438 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2439 2440 ahd_lock(ahd, &flags); 2441 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2442 ppr_options, AHD_TRANS_GOAL, FALSE); 2443 ahd_unlock(ahd, &flags); 2444 } 2445 2446 static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2447 { 2448 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2449 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2450 struct ahd_tmode_tstate *tstate; 2451 struct ahd_initiator_tinfo *tinfo 2452 = ahd_fetch_transinfo(ahd, 2453 starget->channel + 'A', 2454 shost->this_id, starget->id, &tstate); 2455 struct ahd_devinfo devinfo; 2456 unsigned int ppr_options = tinfo->goal.ppr_options 2457 & ~MSG_EXT_PPR_QAS_REQ; 2458 unsigned int period = tinfo->goal.period; 2459 unsigned int dt; 2460 unsigned long flags; 2461 2462 #ifdef AHD_DEBUG 2463 if ((ahd_debug & AHD_SHOW_DV) != 0) 2464 printf("%s: %s QAS\n", ahd_name(ahd), 2465 qas ? "enabling" : "disabling"); 2466 #endif 2467 2468 if (qas) { 2469 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2470 } 2471 2472 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2473 2474 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2475 starget->channel + 'A', ROLE_INITIATOR); 2476 ahd_find_syncrate(ahd, &period, &ppr_options, 2477 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2478 2479 ahd_lock(ahd, &flags); 2480 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2481 ppr_options, AHD_TRANS_GOAL, FALSE); 2482 ahd_unlock(ahd, &flags); 2483 } 2484 2485 static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 2486 { 2487 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2488 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2489 struct ahd_tmode_tstate *tstate; 2490 struct ahd_initiator_tinfo *tinfo 2491 = ahd_fetch_transinfo(ahd, 2492 starget->channel + 'A', 2493 shost->this_id, starget->id, &tstate); 2494 struct ahd_devinfo devinfo; 2495 unsigned int ppr_options = tinfo->goal.ppr_options 2496 & ~MSG_EXT_PPR_IU_REQ; 2497 unsigned int period = tinfo->goal.period; 2498 unsigned int dt; 2499 unsigned long flags; 2500 2501 #ifdef AHD_DEBUG 2502 if ((ahd_debug & AHD_SHOW_DV) != 0) 2503 printf("%s: %s IU\n", ahd_name(ahd), 2504 iu ? "enabling" : "disabling"); 2505 #endif 2506 2507 if (iu) { 2508 ppr_options |= MSG_EXT_PPR_IU_REQ; 2509 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2510 } 2511 2512 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2513 2514 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2515 starget->channel + 'A', ROLE_INITIATOR); 2516 ahd_find_syncrate(ahd, &period, &ppr_options, 2517 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2518 2519 ahd_lock(ahd, &flags); 2520 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2521 ppr_options, AHD_TRANS_GOAL, FALSE); 2522 ahd_unlock(ahd, &flags); 2523 } 2524 2525 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2526 { 2527 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2528 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2529 struct ahd_tmode_tstate *tstate; 2530 struct ahd_initiator_tinfo *tinfo 2531 = ahd_fetch_transinfo(ahd, 2532 starget->channel + 'A', 2533 shost->this_id, starget->id, &tstate); 2534 struct ahd_devinfo devinfo; 2535 unsigned int ppr_options = tinfo->goal.ppr_options 2536 & ~MSG_EXT_PPR_RD_STRM; 2537 unsigned int period = tinfo->goal.period; 2538 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2539 unsigned long flags; 2540 2541 #ifdef AHD_DEBUG 2542 if ((ahd_debug & AHD_SHOW_DV) != 0) 2543 printf("%s: %s Read Streaming\n", ahd_name(ahd), 2544 rdstrm ? "enabling" : "disabling"); 2545 #endif 2546 2547 if (rdstrm) 2548 ppr_options |= MSG_EXT_PPR_RD_STRM; 2549 2550 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2551 starget->channel + 'A', ROLE_INITIATOR); 2552 ahd_find_syncrate(ahd, &period, &ppr_options, 2553 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2554 2555 ahd_lock(ahd, &flags); 2556 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2557 ppr_options, AHD_TRANS_GOAL, FALSE); 2558 ahd_unlock(ahd, &flags); 2559 } 2560 2561 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2562 { 2563 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2564 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2565 struct ahd_tmode_tstate *tstate; 2566 struct ahd_initiator_tinfo *tinfo 2567 = ahd_fetch_transinfo(ahd, 2568 starget->channel + 'A', 2569 shost->this_id, starget->id, &tstate); 2570 struct ahd_devinfo devinfo; 2571 unsigned int ppr_options = tinfo->goal.ppr_options 2572 & ~MSG_EXT_PPR_WR_FLOW; 2573 unsigned int period = tinfo->goal.period; 2574 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2575 unsigned long flags; 2576 2577 #ifdef AHD_DEBUG 2578 if ((ahd_debug & AHD_SHOW_DV) != 0) 2579 printf("%s: %s Write Flow Control\n", ahd_name(ahd), 2580 wrflow ? "enabling" : "disabling"); 2581 #endif 2582 2583 if (wrflow) 2584 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2585 2586 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2587 starget->channel + 'A', ROLE_INITIATOR); 2588 ahd_find_syncrate(ahd, &period, &ppr_options, 2589 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2590 2591 ahd_lock(ahd, &flags); 2592 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2593 ppr_options, AHD_TRANS_GOAL, FALSE); 2594 ahd_unlock(ahd, &flags); 2595 } 2596 2597 static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2598 { 2599 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2600 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2601 struct ahd_tmode_tstate *tstate; 2602 struct ahd_initiator_tinfo *tinfo 2603 = ahd_fetch_transinfo(ahd, 2604 starget->channel + 'A', 2605 shost->this_id, starget->id, &tstate); 2606 struct ahd_devinfo devinfo; 2607 unsigned int ppr_options = tinfo->goal.ppr_options 2608 & ~MSG_EXT_PPR_RTI; 2609 unsigned int period = tinfo->goal.period; 2610 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2611 unsigned long flags; 2612 2613 if ((ahd->features & AHD_RTI) == 0) { 2614 #ifdef AHD_DEBUG 2615 if ((ahd_debug & AHD_SHOW_DV) != 0) 2616 printf("%s: RTI not available\n", ahd_name(ahd)); 2617 #endif 2618 return; 2619 } 2620 2621 #ifdef AHD_DEBUG 2622 if ((ahd_debug & AHD_SHOW_DV) != 0) 2623 printf("%s: %s RTI\n", ahd_name(ahd), 2624 rti ? "enabling" : "disabling"); 2625 #endif 2626 2627 if (rti) 2628 ppr_options |= MSG_EXT_PPR_RTI; 2629 2630 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2631 starget->channel + 'A', ROLE_INITIATOR); 2632 ahd_find_syncrate(ahd, &period, &ppr_options, 2633 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2634 2635 ahd_lock(ahd, &flags); 2636 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2637 ppr_options, AHD_TRANS_GOAL, FALSE); 2638 ahd_unlock(ahd, &flags); 2639 } 2640 2641 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2642 { 2643 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2644 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2645 struct ahd_tmode_tstate *tstate; 2646 struct ahd_initiator_tinfo *tinfo 2647 = ahd_fetch_transinfo(ahd, 2648 starget->channel + 'A', 2649 shost->this_id, starget->id, &tstate); 2650 struct ahd_devinfo devinfo; 2651 unsigned int ppr_options = tinfo->goal.ppr_options 2652 & ~MSG_EXT_PPR_PCOMP_EN; 2653 unsigned int period = tinfo->goal.period; 2654 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2655 unsigned long flags; 2656 2657 #ifdef AHD_DEBUG 2658 if ((ahd_debug & AHD_SHOW_DV) != 0) 2659 printf("%s: %s Precompensation\n", ahd_name(ahd), 2660 pcomp ? "Enable" : "Disable"); 2661 #endif 2662 2663 if (pcomp) 2664 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2665 2666 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2667 starget->channel + 'A', ROLE_INITIATOR); 2668 ahd_find_syncrate(ahd, &period, &ppr_options, 2669 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2670 2671 ahd_lock(ahd, &flags); 2672 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2673 ppr_options, AHD_TRANS_GOAL, FALSE); 2674 ahd_unlock(ahd, &flags); 2675 } 2676 2677 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2678 { 2679 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2680 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2681 struct ahd_tmode_tstate *tstate; 2682 struct ahd_initiator_tinfo *tinfo 2683 = ahd_fetch_transinfo(ahd, 2684 starget->channel + 'A', 2685 shost->this_id, starget->id, &tstate); 2686 struct ahd_devinfo devinfo; 2687 unsigned int ppr_options = tinfo->goal.ppr_options 2688 & ~MSG_EXT_PPR_HOLD_MCS; 2689 unsigned int period = tinfo->goal.period; 2690 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2691 unsigned long flags; 2692 2693 if (hold) 2694 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2695 2696 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2697 starget->channel + 'A', ROLE_INITIATOR); 2698 ahd_find_syncrate(ahd, &period, &ppr_options, 2699 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2700 2701 ahd_lock(ahd, &flags); 2702 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2703 ppr_options, AHD_TRANS_GOAL, FALSE); 2704 ahd_unlock(ahd, &flags); 2705 } 2706 2707 2708 2709 static struct spi_function_template ahd_linux_transport_functions = { 2710 .set_offset = ahd_linux_set_offset, 2711 .show_offset = 1, 2712 .set_period = ahd_linux_set_period, 2713 .show_period = 1, 2714 .set_width = ahd_linux_set_width, 2715 .show_width = 1, 2716 .set_dt = ahd_linux_set_dt, 2717 .show_dt = 1, 2718 .set_iu = ahd_linux_set_iu, 2719 .show_iu = 1, 2720 .set_qas = ahd_linux_set_qas, 2721 .show_qas = 1, 2722 .set_rd_strm = ahd_linux_set_rd_strm, 2723 .show_rd_strm = 1, 2724 .set_wr_flow = ahd_linux_set_wr_flow, 2725 .show_wr_flow = 1, 2726 .set_rti = ahd_linux_set_rti, 2727 .show_rti = 1, 2728 .set_pcomp_en = ahd_linux_set_pcomp_en, 2729 .show_pcomp_en = 1, 2730 .set_hold_mcs = ahd_linux_set_hold_mcs, 2731 .show_hold_mcs = 1, 2732 }; 2733 2734 static int __init 2735 ahd_linux_init(void) 2736 { 2737 int error = 0; 2738 2739 /* 2740 * If we've been passed any parameters, process them now. 2741 */ 2742 if (aic79xx) 2743 aic79xx_setup(aic79xx); 2744 2745 ahd_linux_transport_template = 2746 spi_attach_transport(&ahd_linux_transport_functions); 2747 if (!ahd_linux_transport_template) 2748 return -ENODEV; 2749 2750 scsi_transport_reserve_target(ahd_linux_transport_template, 2751 sizeof(struct ahd_linux_target)); 2752 scsi_transport_reserve_device(ahd_linux_transport_template, 2753 sizeof(struct ahd_linux_device)); 2754 2755 error = ahd_linux_pci_init(); 2756 if (error) 2757 spi_release_transport(ahd_linux_transport_template); 2758 return error; 2759 } 2760 2761 static void __exit 2762 ahd_linux_exit(void) 2763 { 2764 ahd_linux_pci_exit(); 2765 spi_release_transport(ahd_linux_transport_template); 2766 } 2767 2768 module_init(ahd_linux_init); 2769 module_exit(ahd_linux_exit); 2770