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); 439 440 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 441 442 /* 443 * Close the race of a command that was in the process of 444 * being queued to us just as our simq was frozen. Let 445 * DV commands through so long as we are only frozen to 446 * perform DV. 447 */ 448 if (ahd->platform_data->qfrozen != 0) { 449 printf("%s: queue frozen\n", ahd_name(ahd)); 450 451 return SCSI_MLQUEUE_HOST_BUSY; 452 } 453 454 /* 455 * Save the callback on completion function. 456 */ 457 cmd->scsi_done = scsi_done; 458 459 cmd->result = CAM_REQ_INPROG << 16; 460 461 return ahd_linux_run_command(ahd, dev, cmd); 462 } 463 464 static inline struct scsi_target ** 465 ahd_linux_target_in_softc(struct scsi_target *starget) 466 { 467 struct ahd_softc *ahd = 468 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 469 unsigned int target_offset; 470 471 target_offset = starget->id; 472 if (starget->channel != 0) 473 target_offset += 8; 474 475 return &ahd->platform_data->starget[target_offset]; 476 } 477 478 static int 479 ahd_linux_target_alloc(struct scsi_target *starget) 480 { 481 struct ahd_softc *ahd = 482 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 483 unsigned long flags; 484 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 485 struct ahd_linux_target *targ = scsi_transport_target_data(starget); 486 struct ahd_devinfo devinfo; 487 struct ahd_initiator_tinfo *tinfo; 488 struct ahd_tmode_tstate *tstate; 489 char channel = starget->channel + 'A'; 490 491 ahd_lock(ahd, &flags); 492 493 BUG_ON(*ahd_targp != NULL); 494 495 *ahd_targp = starget; 496 memset(targ, 0, sizeof(*targ)); 497 498 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 499 starget->id, &tstate); 500 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id, 501 CAM_LUN_WILDCARD, channel, 502 ROLE_INITIATOR); 503 spi_min_period(starget) = AHD_SYNCRATE_MAX; /* We can do U320 */ 504 if ((ahd->bugs & AHD_PACED_NEGTABLE_BUG) != 0) 505 spi_max_offset(starget) = MAX_OFFSET_PACED_BUG; 506 else 507 spi_max_offset(starget) = MAX_OFFSET_PACED; 508 spi_max_width(starget) = ahd->features & AHD_WIDE; 509 510 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, 511 AHD_TRANS_GOAL, /*paused*/FALSE); 512 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 513 AHD_TRANS_GOAL, /*paused*/FALSE); 514 ahd_unlock(ahd, &flags); 515 516 return 0; 517 } 518 519 static void 520 ahd_linux_target_destroy(struct scsi_target *starget) 521 { 522 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 523 524 *ahd_targp = NULL; 525 } 526 527 static int 528 ahd_linux_slave_alloc(struct scsi_device *sdev) 529 { 530 struct ahd_softc *ahd = 531 *((struct ahd_softc **)sdev->host->hostdata); 532 struct scsi_target *starget = sdev->sdev_target; 533 struct ahd_linux_target *targ = scsi_transport_target_data(starget); 534 struct ahd_linux_device *dev; 535 536 if (bootverbose) 537 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id); 538 539 BUG_ON(targ->sdev[sdev->lun] != NULL); 540 541 dev = scsi_transport_device_data(sdev); 542 memset(dev, 0, sizeof(*dev)); 543 544 /* 545 * We start out life using untagged 546 * transactions of which we allow one. 547 */ 548 dev->openings = 1; 549 550 /* 551 * Set maxtags to 0. This will be changed if we 552 * later determine that we are dealing with 553 * a tagged queuing capable device. 554 */ 555 dev->maxtags = 0; 556 557 targ->sdev[sdev->lun] = sdev; 558 559 return (0); 560 } 561 562 static int 563 ahd_linux_slave_configure(struct scsi_device *sdev) 564 { 565 struct ahd_softc *ahd; 566 567 ahd = *((struct ahd_softc **)sdev->host->hostdata); 568 if (bootverbose) 569 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 570 571 ahd_linux_device_queue_depth(sdev); 572 573 /* Initial Domain Validation */ 574 if (!spi_initial_dv(sdev->sdev_target)) 575 spi_dv_device(sdev); 576 577 return 0; 578 } 579 580 static void 581 ahd_linux_slave_destroy(struct scsi_device *sdev) 582 { 583 struct ahd_softc *ahd; 584 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 585 struct ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target); 586 587 ahd = *((struct ahd_softc **)sdev->host->hostdata); 588 if (bootverbose) 589 printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id); 590 591 BUG_ON(dev->active); 592 593 targ->sdev[sdev->lun] = NULL; 594 595 } 596 597 #if defined(__i386__) 598 /* 599 * Return the disk geometry for the given SCSI device. 600 */ 601 static int 602 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 603 sector_t capacity, int geom[]) 604 { 605 uint8_t *bh; 606 int heads; 607 int sectors; 608 int cylinders; 609 int ret; 610 int extended; 611 struct ahd_softc *ahd; 612 613 ahd = *((struct ahd_softc **)sdev->host->hostdata); 614 615 bh = scsi_bios_ptable(bdev); 616 if (bh) { 617 ret = scsi_partsize(bh, capacity, 618 &geom[2], &geom[0], &geom[1]); 619 kfree(bh); 620 if (ret != -1) 621 return (ret); 622 } 623 heads = 64; 624 sectors = 32; 625 cylinders = aic_sector_div(capacity, heads, sectors); 626 627 if (aic79xx_extended != 0) 628 extended = 1; 629 else 630 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 631 if (extended && cylinders >= 1024) { 632 heads = 255; 633 sectors = 63; 634 cylinders = aic_sector_div(capacity, heads, sectors); 635 } 636 geom[0] = heads; 637 geom[1] = sectors; 638 geom[2] = cylinders; 639 return (0); 640 } 641 #endif 642 643 /* 644 * Abort the current SCSI command(s). 645 */ 646 static int 647 ahd_linux_abort(struct scsi_cmnd *cmd) 648 { 649 int error; 650 651 error = ahd_linux_queue_recovery_cmd(cmd, SCB_ABORT); 652 if (error != 0) 653 printf("aic79xx_abort returns 0x%x\n", error); 654 return error; 655 } 656 657 /* 658 * Attempt to send a target reset message to the device that timed out. 659 */ 660 static int 661 ahd_linux_dev_reset(struct scsi_cmnd *cmd) 662 { 663 int error; 664 665 error = ahd_linux_queue_recovery_cmd(cmd, SCB_DEVICE_RESET); 666 if (error != 0) 667 printf("aic79xx_dev_reset returns 0x%x\n", error); 668 return error; 669 } 670 671 /* 672 * Reset the SCSI bus. 673 */ 674 static int 675 ahd_linux_bus_reset(struct scsi_cmnd *cmd) 676 { 677 struct ahd_softc *ahd; 678 u_long s; 679 int found; 680 681 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 682 #ifdef AHD_DEBUG 683 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 684 printf("%s: Bus reset called for cmd %p\n", 685 ahd_name(ahd), cmd); 686 #endif 687 ahd_lock(ahd, &s); 688 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 689 /*initiate reset*/TRUE); 690 ahd_unlock(ahd, &s); 691 692 if (bootverbose) 693 printf("%s: SCSI bus reset delivered. " 694 "%d SCBs aborted.\n", ahd_name(ahd), found); 695 696 return (SUCCESS); 697 } 698 699 struct scsi_host_template aic79xx_driver_template = { 700 .module = THIS_MODULE, 701 .name = "aic79xx", 702 .proc_name = "aic79xx", 703 .proc_info = ahd_linux_proc_info, 704 .info = ahd_linux_info, 705 .queuecommand = ahd_linux_queue, 706 .eh_abort_handler = ahd_linux_abort, 707 .eh_device_reset_handler = ahd_linux_dev_reset, 708 .eh_bus_reset_handler = ahd_linux_bus_reset, 709 #if defined(__i386__) 710 .bios_param = ahd_linux_biosparam, 711 #endif 712 .can_queue = AHD_MAX_QUEUE, 713 .this_id = -1, 714 .cmd_per_lun = 2, 715 .use_clustering = ENABLE_CLUSTERING, 716 .slave_alloc = ahd_linux_slave_alloc, 717 .slave_configure = ahd_linux_slave_configure, 718 .slave_destroy = ahd_linux_slave_destroy, 719 .target_alloc = ahd_linux_target_alloc, 720 .target_destroy = ahd_linux_target_destroy, 721 }; 722 723 /******************************** Bus DMA *************************************/ 724 int 725 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 726 bus_size_t alignment, bus_size_t boundary, 727 dma_addr_t lowaddr, dma_addr_t highaddr, 728 bus_dma_filter_t *filter, void *filterarg, 729 bus_size_t maxsize, int nsegments, 730 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 731 { 732 bus_dma_tag_t dmat; 733 734 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); 735 if (dmat == NULL) 736 return (ENOMEM); 737 738 /* 739 * Linux is very simplistic about DMA memory. For now don't 740 * maintain all specification information. Once Linux supplies 741 * better facilities for doing these operations, or the 742 * needs of this particular driver change, we might need to do 743 * more here. 744 */ 745 dmat->alignment = alignment; 746 dmat->boundary = boundary; 747 dmat->maxsize = maxsize; 748 *ret_tag = dmat; 749 return (0); 750 } 751 752 void 753 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 754 { 755 free(dmat, M_DEVBUF); 756 } 757 758 int 759 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 760 int flags, bus_dmamap_t *mapp) 761 { 762 *vaddr = pci_alloc_consistent(ahd->dev_softc, 763 dmat->maxsize, mapp); 764 if (*vaddr == NULL) 765 return (ENOMEM); 766 return(0); 767 } 768 769 void 770 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 771 void* vaddr, bus_dmamap_t map) 772 { 773 pci_free_consistent(ahd->dev_softc, dmat->maxsize, 774 vaddr, map); 775 } 776 777 int 778 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 779 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 780 void *cb_arg, int flags) 781 { 782 /* 783 * Assume for now that this will only be used during 784 * initialization and not for per-transaction buffer mapping. 785 */ 786 bus_dma_segment_t stack_sg; 787 788 stack_sg.ds_addr = map; 789 stack_sg.ds_len = dmat->maxsize; 790 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 791 return (0); 792 } 793 794 void 795 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 796 { 797 } 798 799 int 800 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 801 { 802 /* Nothing to do */ 803 return (0); 804 } 805 806 /********************* Platform Dependent Functions ***************************/ 807 /* 808 * Compare "left hand" softc with "right hand" softc, returning: 809 * < 0 - lahd has a lower priority than rahd 810 * 0 - Softcs are equal 811 * > 0 - lahd has a higher priority than rahd 812 */ 813 int 814 ahd_softc_comp(struct ahd_softc *lahd, struct ahd_softc *rahd) 815 { 816 int value; 817 818 /* 819 * Under Linux, cards are ordered as follows: 820 * 1) PCI devices that are marked as the boot controller. 821 * 2) PCI devices with BIOS enabled sorted by bus/slot/func. 822 * 3) All remaining PCI devices sorted by bus/slot/func. 823 */ 824 #if 0 825 value = (lahd->flags & AHD_BOOT_CHANNEL) 826 - (rahd->flags & AHD_BOOT_CHANNEL); 827 if (value != 0) 828 /* Controllers set for boot have a *higher* priority */ 829 return (value); 830 #endif 831 832 value = (lahd->flags & AHD_BIOS_ENABLED) 833 - (rahd->flags & AHD_BIOS_ENABLED); 834 if (value != 0) 835 /* Controllers with BIOS enabled have a *higher* priority */ 836 return (value); 837 838 /* Still equal. Sort by bus/slot/func. */ 839 if (aic79xx_reverse_scan != 0) 840 value = ahd_get_pci_bus(lahd->dev_softc) 841 - ahd_get_pci_bus(rahd->dev_softc); 842 else 843 value = ahd_get_pci_bus(rahd->dev_softc) 844 - ahd_get_pci_bus(lahd->dev_softc); 845 if (value != 0) 846 return (value); 847 if (aic79xx_reverse_scan != 0) 848 value = ahd_get_pci_slot(lahd->dev_softc) 849 - ahd_get_pci_slot(rahd->dev_softc); 850 else 851 value = ahd_get_pci_slot(rahd->dev_softc) 852 - ahd_get_pci_slot(lahd->dev_softc); 853 if (value != 0) 854 return (value); 855 856 value = rahd->channel - lahd->channel; 857 return (value); 858 } 859 860 static void 861 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 862 { 863 864 if ((instance >= 0) 865 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) { 866 uint8_t *iocell_info; 867 868 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 869 iocell_info[index] = value & 0xFFFF; 870 if (bootverbose) 871 printf("iocell[%d:%ld] = %d\n", instance, index, value); 872 } 873 } 874 875 static void 876 ahd_linux_setup_tag_info_global(char *p) 877 { 878 int tags, i, j; 879 880 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 881 printf("Setting Global Tags= %d\n", tags); 882 883 for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) { 884 for (j = 0; j < AHD_NUM_TARGETS; j++) { 885 aic79xx_tag_info[i].tag_commands[j] = tags; 886 } 887 } 888 } 889 890 static void 891 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 892 { 893 894 if ((instance >= 0) && (targ >= 0) 895 && (instance < NUM_ELEMENTS(aic79xx_tag_info)) 896 && (targ < AHD_NUM_TARGETS)) { 897 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 898 if (bootverbose) 899 printf("tag_info[%d:%d] = %d\n", instance, targ, value); 900 } 901 } 902 903 static char * 904 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 905 void (*callback)(u_long, int, int, int32_t), 906 u_long callback_arg) 907 { 908 char *tok_end; 909 char *tok_end2; 910 int i; 911 int instance; 912 int targ; 913 int done; 914 char tok_list[] = {'.', ',', '{', '}', '\0'}; 915 916 /* All options use a ':' name/arg separator */ 917 if (*opt_arg != ':') 918 return (opt_arg); 919 opt_arg++; 920 instance = -1; 921 targ = -1; 922 done = FALSE; 923 /* 924 * Restore separator that may be in 925 * the middle of our option argument. 926 */ 927 tok_end = strchr(opt_arg, '\0'); 928 if (tok_end < end) 929 *tok_end = ','; 930 while (!done) { 931 switch (*opt_arg) { 932 case '{': 933 if (instance == -1) { 934 instance = 0; 935 } else { 936 if (depth > 1) { 937 if (targ == -1) 938 targ = 0; 939 } else { 940 printf("Malformed Option %s\n", 941 opt_name); 942 done = TRUE; 943 } 944 } 945 opt_arg++; 946 break; 947 case '}': 948 if (targ != -1) 949 targ = -1; 950 else if (instance != -1) 951 instance = -1; 952 opt_arg++; 953 break; 954 case ',': 955 case '.': 956 if (instance == -1) 957 done = TRUE; 958 else if (targ >= 0) 959 targ++; 960 else if (instance >= 0) 961 instance++; 962 opt_arg++; 963 break; 964 case '\0': 965 done = TRUE; 966 break; 967 default: 968 tok_end = end; 969 for (i = 0; tok_list[i]; i++) { 970 tok_end2 = strchr(opt_arg, tok_list[i]); 971 if ((tok_end2) && (tok_end2 < tok_end)) 972 tok_end = tok_end2; 973 } 974 callback(callback_arg, instance, targ, 975 simple_strtol(opt_arg, NULL, 0)); 976 opt_arg = tok_end; 977 break; 978 } 979 } 980 return (opt_arg); 981 } 982 983 /* 984 * Handle Linux boot parameters. This routine allows for assigning a value 985 * to a parameter with a ':' between the parameter and the value. 986 * ie. aic79xx=stpwlev:1,extended 987 */ 988 static int 989 aic79xx_setup(char *s) 990 { 991 int i, n; 992 char *p; 993 char *end; 994 995 static struct { 996 const char *name; 997 uint32_t *flag; 998 } options[] = { 999 { "extended", &aic79xx_extended }, 1000 { "no_reset", &aic79xx_no_reset }, 1001 { "verbose", &aic79xx_verbose }, 1002 { "allow_memio", &aic79xx_allow_memio}, 1003 #ifdef AHD_DEBUG 1004 { "debug", &ahd_debug }, 1005 #endif 1006 { "reverse_scan", &aic79xx_reverse_scan }, 1007 { "periodic_otag", &aic79xx_periodic_otag }, 1008 { "pci_parity", &aic79xx_pci_parity }, 1009 { "seltime", &aic79xx_seltime }, 1010 { "tag_info", NULL }, 1011 { "global_tag_depth", NULL}, 1012 { "slewrate", NULL }, 1013 { "precomp", NULL }, 1014 { "amplitude", NULL }, 1015 }; 1016 1017 end = strchr(s, '\0'); 1018 1019 /* 1020 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS 1021 * will never be 0 in this case. 1022 */ 1023 n = 0; 1024 1025 while ((p = strsep(&s, ",.")) != NULL) { 1026 if (*p == '\0') 1027 continue; 1028 for (i = 0; i < NUM_ELEMENTS(options); i++) { 1029 1030 n = strlen(options[i].name); 1031 if (strncmp(options[i].name, p, n) == 0) 1032 break; 1033 } 1034 if (i == NUM_ELEMENTS(options)) 1035 continue; 1036 1037 if (strncmp(p, "global_tag_depth", n) == 0) { 1038 ahd_linux_setup_tag_info_global(p + n); 1039 } else if (strncmp(p, "tag_info", n) == 0) { 1040 s = ahd_parse_brace_option("tag_info", p + n, end, 1041 2, ahd_linux_setup_tag_info, 0); 1042 } else if (strncmp(p, "slewrate", n) == 0) { 1043 s = ahd_parse_brace_option("slewrate", 1044 p + n, end, 1, ahd_linux_setup_iocell_info, 1045 AIC79XX_SLEWRATE_INDEX); 1046 } else if (strncmp(p, "precomp", n) == 0) { 1047 s = ahd_parse_brace_option("precomp", 1048 p + n, end, 1, ahd_linux_setup_iocell_info, 1049 AIC79XX_PRECOMP_INDEX); 1050 } else if (strncmp(p, "amplitude", n) == 0) { 1051 s = ahd_parse_brace_option("amplitude", 1052 p + n, end, 1, ahd_linux_setup_iocell_info, 1053 AIC79XX_AMPLITUDE_INDEX); 1054 } else if (p[n] == ':') { 1055 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1056 } else if (!strncmp(p, "verbose", n)) { 1057 *(options[i].flag) = 1; 1058 } else { 1059 *(options[i].flag) ^= 0xFFFFFFFF; 1060 } 1061 } 1062 return 1; 1063 } 1064 1065 __setup("aic79xx=", aic79xx_setup); 1066 1067 uint32_t aic79xx_verbose; 1068 1069 int 1070 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1071 { 1072 char buf[80]; 1073 struct Scsi_Host *host; 1074 char *new_name; 1075 u_long s; 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_lock(ahd, &s); 1084 scsi_assign_lock(host, &ahd->platform_data->spin_lock); 1085 ahd->platform_data->host = host; 1086 host->can_queue = AHD_MAX_QUEUE; 1087 host->cmd_per_lun = 2; 1088 host->sg_tablesize = AHD_NSEG; 1089 host->this_id = ahd->our_id; 1090 host->irq = ahd->platform_data->irq; 1091 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1092 host->max_lun = AHD_NUM_LUNS; 1093 host->max_channel = 0; 1094 host->sg_tablesize = AHD_NSEG; 1095 ahd_set_unit(ahd, ahd_linux_unit++); 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 ahd_unlock(ahd, &s); 1106 1107 host->transportt = ahd_linux_transport_template; 1108 1109 scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */ 1110 scsi_scan_host(host); 1111 return (0); 1112 } 1113 1114 uint64_t 1115 ahd_linux_get_memsize(void) 1116 { 1117 struct sysinfo si; 1118 1119 si_meminfo(&si); 1120 return ((uint64_t)si.totalram << PAGE_SHIFT); 1121 } 1122 1123 /* 1124 * Place the SCSI bus into a known state by either resetting it, 1125 * or forcing transfer negotiations on the next command to any 1126 * target. 1127 */ 1128 static void 1129 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1130 { 1131 u_int target_id; 1132 u_int numtarg; 1133 1134 target_id = 0; 1135 numtarg = 0; 1136 1137 if (aic79xx_no_reset != 0) 1138 ahd->flags &= ~AHD_RESET_BUS_A; 1139 1140 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1141 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1142 else 1143 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1144 1145 /* 1146 * Force negotiation to async for all targets that 1147 * will not see an initial bus reset. 1148 */ 1149 for (; target_id < numtarg; target_id++) { 1150 struct ahd_devinfo devinfo; 1151 struct ahd_initiator_tinfo *tinfo; 1152 struct ahd_tmode_tstate *tstate; 1153 1154 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1155 target_id, &tstate); 1156 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1157 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1158 ahd_update_neg_request(ahd, &devinfo, tstate, 1159 tinfo, AHD_NEG_ALWAYS); 1160 } 1161 /* Give the bus some time to recover */ 1162 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1163 ahd_freeze_simq(ahd); 1164 init_timer(&ahd->platform_data->reset_timer); 1165 ahd->platform_data->reset_timer.data = (u_long)ahd; 1166 ahd->platform_data->reset_timer.expires = 1167 jiffies + (AIC79XX_RESET_DELAY * HZ)/1000; 1168 ahd->platform_data->reset_timer.function = 1169 (ahd_linux_callback_t *)ahd_release_simq; 1170 add_timer(&ahd->platform_data->reset_timer); 1171 } 1172 } 1173 1174 int 1175 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1176 { 1177 ahd->platform_data = 1178 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT); 1179 if (ahd->platform_data == NULL) 1180 return (ENOMEM); 1181 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data)); 1182 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1183 ahd_lockinit(ahd); 1184 init_MUTEX_LOCKED(&ahd->platform_data->eh_sem); 1185 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1186 return (0); 1187 } 1188 1189 void 1190 ahd_platform_free(struct ahd_softc *ahd) 1191 { 1192 struct scsi_target *starget; 1193 int i, j; 1194 1195 if (ahd->platform_data != NULL) { 1196 /* destroy all of the device and target objects */ 1197 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1198 starget = ahd->platform_data->starget[i]; 1199 if (starget != NULL) { 1200 for (j = 0; j < AHD_NUM_LUNS; j++) { 1201 struct ahd_linux_target *targ = 1202 scsi_transport_target_data(starget); 1203 if (targ->sdev[j] == NULL) 1204 continue; 1205 targ->sdev[j] = NULL; 1206 } 1207 ahd->platform_data->starget[i] = NULL; 1208 } 1209 } 1210 1211 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1212 free_irq(ahd->platform_data->irq, ahd); 1213 if (ahd->tags[0] == BUS_SPACE_PIO 1214 && ahd->bshs[0].ioport != 0) 1215 release_region(ahd->bshs[0].ioport, 256); 1216 if (ahd->tags[1] == BUS_SPACE_PIO 1217 && ahd->bshs[1].ioport != 0) 1218 release_region(ahd->bshs[1].ioport, 256); 1219 if (ahd->tags[0] == BUS_SPACE_MEMIO 1220 && ahd->bshs[0].maddr != NULL) { 1221 iounmap(ahd->bshs[0].maddr); 1222 release_mem_region(ahd->platform_data->mem_busaddr, 1223 0x1000); 1224 } 1225 if (ahd->platform_data->host) 1226 scsi_host_put(ahd->platform_data->host); 1227 1228 free(ahd->platform_data, M_DEVBUF); 1229 } 1230 } 1231 1232 void 1233 ahd_platform_init(struct ahd_softc *ahd) 1234 { 1235 /* 1236 * Lookup and commit any modified IO Cell options. 1237 */ 1238 if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) { 1239 struct ahd_linux_iocell_opts *iocell_opts; 1240 1241 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1242 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1243 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1244 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1245 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1246 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1247 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1248 } 1249 1250 } 1251 1252 void 1253 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1254 { 1255 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1256 SCB_GET_CHANNEL(ahd, scb), 1257 SCB_GET_LUN(scb), SCB_LIST_NULL, 1258 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1259 } 1260 1261 void 1262 ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, 1263 ahd_queue_alg alg) 1264 { 1265 struct scsi_target *starget; 1266 struct ahd_linux_target *targ; 1267 struct ahd_linux_device *dev; 1268 struct scsi_device *sdev; 1269 int was_queuing; 1270 int now_queuing; 1271 1272 starget = ahd->platform_data->starget[devinfo->target]; 1273 targ = scsi_transport_target_data(starget); 1274 BUG_ON(targ == NULL); 1275 sdev = targ->sdev[devinfo->lun]; 1276 if (sdev == NULL) 1277 return; 1278 1279 dev = scsi_transport_device_data(sdev); 1280 1281 if (dev == NULL) 1282 return; 1283 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1284 switch (alg) { 1285 default: 1286 case AHD_QUEUE_NONE: 1287 now_queuing = 0; 1288 break; 1289 case AHD_QUEUE_BASIC: 1290 now_queuing = AHD_DEV_Q_BASIC; 1291 break; 1292 case AHD_QUEUE_TAGGED: 1293 now_queuing = AHD_DEV_Q_TAGGED; 1294 break; 1295 } 1296 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1297 && (was_queuing != now_queuing) 1298 && (dev->active != 0)) { 1299 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1300 dev->qfrozen++; 1301 } 1302 1303 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1304 if (now_queuing) { 1305 u_int usertags; 1306 1307 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1308 if (!was_queuing) { 1309 /* 1310 * Start out agressively and allow our 1311 * dynamic queue depth algorithm to take 1312 * care of the rest. 1313 */ 1314 dev->maxtags = usertags; 1315 dev->openings = dev->maxtags - dev->active; 1316 } 1317 if (dev->maxtags == 0) { 1318 /* 1319 * Queueing is disabled by the user. 1320 */ 1321 dev->openings = 1; 1322 } else if (alg == AHD_QUEUE_TAGGED) { 1323 dev->flags |= AHD_DEV_Q_TAGGED; 1324 if (aic79xx_periodic_otag != 0) 1325 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1326 } else 1327 dev->flags |= AHD_DEV_Q_BASIC; 1328 } else { 1329 /* We can only have one opening. */ 1330 dev->maxtags = 0; 1331 dev->openings = 1 - dev->active; 1332 } 1333 1334 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1335 case AHD_DEV_Q_BASIC: 1336 scsi_adjust_queue_depth(sdev, 1337 MSG_SIMPLE_TASK, 1338 dev->openings + dev->active); 1339 break; 1340 case AHD_DEV_Q_TAGGED: 1341 scsi_adjust_queue_depth(sdev, 1342 MSG_ORDERED_TASK, 1343 dev->openings + dev->active); 1344 break; 1345 default: 1346 /* 1347 * We allow the OS to queue 2 untagged transactions to 1348 * us at any time even though we can only execute them 1349 * serially on the controller/device. This should 1350 * remove some latency. 1351 */ 1352 scsi_adjust_queue_depth(sdev, 1353 /*NON-TAGGED*/0, 1354 /*queue depth*/2); 1355 break; 1356 } 1357 } 1358 1359 int 1360 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1361 int lun, u_int tag, role_t role, uint32_t status) 1362 { 1363 return 0; 1364 } 1365 1366 static u_int 1367 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1368 { 1369 static int warned_user; 1370 u_int tags; 1371 1372 tags = 0; 1373 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1374 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) { 1375 1376 if (warned_user == 0) { 1377 printf(KERN_WARNING 1378 "aic79xx: WARNING: Insufficient tag_info instances\n" 1379 "aic79xx: for installed controllers. Using defaults\n" 1380 "aic79xx: Please update the aic79xx_tag_info array in\n" 1381 "aic79xx: the aic79xx_osm.c source file.\n"); 1382 warned_user++; 1383 } 1384 tags = AHD_MAX_QUEUE; 1385 } else { 1386 adapter_tag_info_t *tag_info; 1387 1388 tag_info = &aic79xx_tag_info[ahd->unit]; 1389 tags = tag_info->tag_commands[devinfo->target_offset]; 1390 if (tags > AHD_MAX_QUEUE) 1391 tags = AHD_MAX_QUEUE; 1392 } 1393 } 1394 return (tags); 1395 } 1396 1397 /* 1398 * Determines the queue depth for a given device. 1399 */ 1400 static void 1401 ahd_linux_device_queue_depth(struct scsi_device *sdev) 1402 { 1403 struct ahd_devinfo devinfo; 1404 u_int tags; 1405 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1406 1407 ahd_compile_devinfo(&devinfo, 1408 ahd->our_id, 1409 sdev->sdev_target->id, sdev->lun, 1410 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1411 ROLE_INITIATOR); 1412 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1413 if (tags != 0 && sdev->tagged_supported != 0) { 1414 1415 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED); 1416 ahd_print_devinfo(ahd, &devinfo); 1417 printf("Tagged Queuing enabled. Depth %d\n", tags); 1418 } else { 1419 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE); 1420 } 1421 } 1422 1423 static int 1424 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1425 struct scsi_cmnd *cmd) 1426 { 1427 struct scb *scb; 1428 struct hardware_scb *hscb; 1429 struct ahd_initiator_tinfo *tinfo; 1430 struct ahd_tmode_tstate *tstate; 1431 u_int col_idx; 1432 uint16_t mask; 1433 1434 /* 1435 * Get an scb to use. 1436 */ 1437 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1438 cmd->device->id, &tstate); 1439 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1440 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1441 col_idx = AHD_NEVER_COL_IDX; 1442 } else { 1443 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1444 cmd->device->lun); 1445 } 1446 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1447 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1448 return SCSI_MLQUEUE_HOST_BUSY; 1449 } 1450 1451 scb->io_ctx = cmd; 1452 scb->platform_data->dev = dev; 1453 hscb = scb->hscb; 1454 cmd->host_scribble = (char *)scb; 1455 1456 /* 1457 * Fill out basics of the HSCB. 1458 */ 1459 hscb->control = 0; 1460 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1461 hscb->lun = cmd->device->lun; 1462 scb->hscb->task_management = 0; 1463 mask = SCB_GET_TARGET_MASK(ahd, scb); 1464 1465 if ((ahd->user_discenable & mask) != 0) 1466 hscb->control |= DISCENB; 1467 1468 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1469 scb->flags |= SCB_PACKETIZED; 1470 1471 if ((tstate->auto_negotiate & mask) != 0) { 1472 scb->flags |= SCB_AUTO_NEGOTIATE; 1473 scb->hscb->control |= MK_MESSAGE; 1474 } 1475 1476 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1477 int msg_bytes; 1478 uint8_t tag_msgs[2]; 1479 1480 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1481 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1482 hscb->control |= tag_msgs[0]; 1483 if (tag_msgs[0] == MSG_ORDERED_TASK) 1484 dev->commands_since_idle_or_otag = 0; 1485 } else 1486 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1487 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1488 hscb->control |= MSG_ORDERED_TASK; 1489 dev->commands_since_idle_or_otag = 0; 1490 } else { 1491 hscb->control |= MSG_SIMPLE_TASK; 1492 } 1493 } 1494 1495 hscb->cdb_len = cmd->cmd_len; 1496 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1497 1498 scb->platform_data->xfer_len = 0; 1499 ahd_set_residual(scb, 0); 1500 ahd_set_sense_residual(scb, 0); 1501 scb->sg_count = 0; 1502 if (cmd->use_sg != 0) { 1503 void *sg; 1504 struct scatterlist *cur_seg; 1505 u_int nseg; 1506 int dir; 1507 1508 cur_seg = (struct scatterlist *)cmd->request_buffer; 1509 dir = cmd->sc_data_direction; 1510 nseg = pci_map_sg(ahd->dev_softc, cur_seg, 1511 cmd->use_sg, dir); 1512 scb->platform_data->xfer_len = 0; 1513 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) { 1514 dma_addr_t addr; 1515 bus_size_t len; 1516 1517 addr = sg_dma_address(cur_seg); 1518 len = sg_dma_len(cur_seg); 1519 scb->platform_data->xfer_len += len; 1520 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1521 /*last*/nseg == 1); 1522 } 1523 } else if (cmd->request_bufflen != 0) { 1524 void *sg; 1525 dma_addr_t addr; 1526 int dir; 1527 1528 sg = scb->sg_list; 1529 dir = cmd->sc_data_direction; 1530 addr = pci_map_single(ahd->dev_softc, 1531 cmd->request_buffer, 1532 cmd->request_bufflen, dir); 1533 scb->platform_data->xfer_len = cmd->request_bufflen; 1534 scb->platform_data->buf_busaddr = addr; 1535 sg = ahd_sg_setup(ahd, scb, sg, addr, 1536 cmd->request_bufflen, /*last*/TRUE); 1537 } 1538 1539 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1540 dev->openings--; 1541 dev->active++; 1542 dev->commands_issued++; 1543 1544 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1545 dev->commands_since_idle_or_otag++; 1546 scb->flags |= SCB_ACTIVE; 1547 ahd_queue_scb(ahd, scb); 1548 1549 return 0; 1550 } 1551 1552 /* 1553 * SCSI controller interrupt handler. 1554 */ 1555 irqreturn_t 1556 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs) 1557 { 1558 struct ahd_softc *ahd; 1559 u_long flags; 1560 int ours; 1561 1562 ahd = (struct ahd_softc *) dev_id; 1563 ahd_lock(ahd, &flags); 1564 ours = ahd_intr(ahd); 1565 ahd_unlock(ahd, &flags); 1566 return IRQ_RETVAL(ours); 1567 } 1568 1569 void 1570 ahd_platform_flushwork(struct ahd_softc *ahd) 1571 { 1572 1573 } 1574 1575 void 1576 ahd_send_async(struct ahd_softc *ahd, char channel, 1577 u_int target, u_int lun, ac_code code, void *arg) 1578 { 1579 switch (code) { 1580 case AC_TRANSFER_NEG: 1581 { 1582 char buf[80]; 1583 struct scsi_target *starget; 1584 struct ahd_linux_target *targ; 1585 struct info_str info; 1586 struct ahd_initiator_tinfo *tinfo; 1587 struct ahd_tmode_tstate *tstate; 1588 unsigned int target_ppr_options; 1589 1590 BUG_ON(target == CAM_TARGET_WILDCARD); 1591 1592 info.buffer = buf; 1593 info.length = sizeof(buf); 1594 info.offset = 0; 1595 info.pos = 0; 1596 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1597 target, &tstate); 1598 1599 /* 1600 * Don't bother reporting results while 1601 * negotiations are still pending. 1602 */ 1603 if (tinfo->curr.period != tinfo->goal.period 1604 || tinfo->curr.width != tinfo->goal.width 1605 || tinfo->curr.offset != tinfo->goal.offset 1606 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1607 if (bootverbose == 0) 1608 break; 1609 1610 /* 1611 * Don't bother reporting results that 1612 * are identical to those last reported. 1613 */ 1614 starget = ahd->platform_data->starget[target]; 1615 if (starget == NULL) 1616 break; 1617 targ = scsi_transport_target_data(starget); 1618 1619 target_ppr_options = 1620 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1621 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1622 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1623 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1624 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1625 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1626 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1627 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1628 1629 if (tinfo->curr.period == spi_period(starget) 1630 && tinfo->curr.width == spi_width(starget) 1631 && tinfo->curr.offset == spi_offset(starget) 1632 && tinfo->curr.ppr_options == target_ppr_options) 1633 if (bootverbose == 0) 1634 break; 1635 1636 spi_period(starget) = tinfo->curr.period; 1637 spi_width(starget) = tinfo->curr.width; 1638 spi_offset(starget) = tinfo->curr.offset; 1639 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1640 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1641 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1642 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1643 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1644 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1645 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1646 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1647 spi_display_xfer_agreement(starget); 1648 break; 1649 } 1650 case AC_SENT_BDR: 1651 { 1652 WARN_ON(lun != CAM_LUN_WILDCARD); 1653 scsi_report_device_reset(ahd->platform_data->host, 1654 channel - 'A', target); 1655 break; 1656 } 1657 case AC_BUS_RESET: 1658 if (ahd->platform_data->host != NULL) { 1659 scsi_report_bus_reset(ahd->platform_data->host, 1660 channel - 'A'); 1661 } 1662 break; 1663 default: 1664 panic("ahd_send_async: Unexpected async event"); 1665 } 1666 } 1667 1668 /* 1669 * Calls the higher level scsi done function and frees the scb. 1670 */ 1671 void 1672 ahd_done(struct ahd_softc *ahd, struct scb *scb) 1673 { 1674 struct scsi_cmnd *cmd; 1675 struct ahd_linux_device *dev; 1676 1677 if ((scb->flags & SCB_ACTIVE) == 0) { 1678 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1679 ahd_dump_card_state(ahd); 1680 panic("Stopping for safety"); 1681 } 1682 LIST_REMOVE(scb, pending_links); 1683 cmd = scb->io_ctx; 1684 dev = scb->platform_data->dev; 1685 dev->active--; 1686 dev->openings++; 1687 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1688 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1689 dev->qfrozen--; 1690 } 1691 ahd_linux_unmap_scb(ahd, scb); 1692 1693 /* 1694 * Guard against stale sense data. 1695 * The Linux mid-layer assumes that sense 1696 * was retrieved anytime the first byte of 1697 * the sense buffer looks "sane". 1698 */ 1699 cmd->sense_buffer[0] = 0; 1700 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1701 uint32_t amount_xferred; 1702 1703 amount_xferred = 1704 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1705 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1706 #ifdef AHD_DEBUG 1707 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1708 ahd_print_path(ahd, scb); 1709 printf("Set CAM_UNCOR_PARITY\n"); 1710 } 1711 #endif 1712 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1713 #ifdef AHD_REPORT_UNDERFLOWS 1714 /* 1715 * This code is disabled by default as some 1716 * clients of the SCSI system do not properly 1717 * initialize the underflow parameter. This 1718 * results in spurious termination of commands 1719 * that complete as expected (e.g. underflow is 1720 * allowed as command can return variable amounts 1721 * of data. 1722 */ 1723 } else if (amount_xferred < scb->io_ctx->underflow) { 1724 u_int i; 1725 1726 ahd_print_path(ahd, scb); 1727 printf("CDB:"); 1728 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1729 printf(" 0x%x", scb->io_ctx->cmnd[i]); 1730 printf("\n"); 1731 ahd_print_path(ahd, scb); 1732 printf("Saw underflow (%ld of %ld bytes). " 1733 "Treated as error\n", 1734 ahd_get_residual(scb), 1735 ahd_get_transfer_length(scb)); 1736 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1737 #endif 1738 } else { 1739 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1740 } 1741 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1742 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1743 } 1744 1745 if (dev->openings == 1 1746 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1747 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1748 dev->tag_success_count++; 1749 /* 1750 * Some devices deal with temporary internal resource 1751 * shortages by returning queue full. When the queue 1752 * full occurrs, we throttle back. Slowly try to get 1753 * back to our previous queue depth. 1754 */ 1755 if ((dev->openings + dev->active) < dev->maxtags 1756 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1757 dev->tag_success_count = 0; 1758 dev->openings++; 1759 } 1760 1761 if (dev->active == 0) 1762 dev->commands_since_idle_or_otag = 0; 1763 1764 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1765 printf("Recovery SCB completes\n"); 1766 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1767 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1768 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1769 if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) { 1770 ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM; 1771 up(&ahd->platform_data->eh_sem); 1772 } 1773 } 1774 1775 ahd_free_scb(ahd, scb); 1776 ahd_linux_queue_cmd_complete(ahd, cmd); 1777 } 1778 1779 static void 1780 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1781 struct scsi_device *sdev, struct scb *scb) 1782 { 1783 struct ahd_devinfo devinfo; 1784 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1785 1786 ahd_compile_devinfo(&devinfo, 1787 ahd->our_id, 1788 sdev->sdev_target->id, sdev->lun, 1789 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1790 ROLE_INITIATOR); 1791 1792 /* 1793 * We don't currently trust the mid-layer to 1794 * properly deal with queue full or busy. So, 1795 * when one occurs, we tell the mid-layer to 1796 * unconditionally requeue the command to us 1797 * so that we can retry it ourselves. We also 1798 * implement our own throttling mechanism so 1799 * we don't clobber the device with too many 1800 * commands. 1801 */ 1802 switch (ahd_get_scsi_status(scb)) { 1803 default: 1804 break; 1805 case SCSI_STATUS_CHECK_COND: 1806 case SCSI_STATUS_CMD_TERMINATED: 1807 { 1808 struct scsi_cmnd *cmd; 1809 1810 /* 1811 * Copy sense information to the OS's cmd 1812 * structure if it is available. 1813 */ 1814 cmd = scb->io_ctx; 1815 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1816 struct scsi_status_iu_header *siu; 1817 u_int sense_size; 1818 u_int sense_offset; 1819 1820 if (scb->flags & SCB_SENSE) { 1821 sense_size = MIN(sizeof(struct scsi_sense_data) 1822 - ahd_get_sense_residual(scb), 1823 sizeof(cmd->sense_buffer)); 1824 sense_offset = 0; 1825 } else { 1826 /* 1827 * Copy only the sense data into the provided 1828 * buffer. 1829 */ 1830 siu = (struct scsi_status_iu_header *) 1831 scb->sense_data; 1832 sense_size = MIN(scsi_4btoul(siu->sense_length), 1833 sizeof(cmd->sense_buffer)); 1834 sense_offset = SIU_SENSE_OFFSET(siu); 1835 } 1836 1837 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); 1838 memcpy(cmd->sense_buffer, 1839 ahd_get_sense_buf(ahd, scb) 1840 + sense_offset, sense_size); 1841 cmd->result |= (DRIVER_SENSE << 24); 1842 1843 #ifdef AHD_DEBUG 1844 if (ahd_debug & AHD_SHOW_SENSE) { 1845 int i; 1846 1847 printf("Copied %d bytes of sense data at %d:", 1848 sense_size, sense_offset); 1849 for (i = 0; i < sense_size; i++) { 1850 if ((i & 0xF) == 0) 1851 printf("\n"); 1852 printf("0x%x ", cmd->sense_buffer[i]); 1853 } 1854 printf("\n"); 1855 } 1856 #endif 1857 } 1858 break; 1859 } 1860 case SCSI_STATUS_QUEUE_FULL: 1861 /* 1862 * By the time the core driver has returned this 1863 * command, all other commands that were queued 1864 * to us but not the device have been returned. 1865 * This ensures that dev->active is equal to 1866 * the number of commands actually queued to 1867 * the device. 1868 */ 1869 dev->tag_success_count = 0; 1870 if (dev->active != 0) { 1871 /* 1872 * Drop our opening count to the number 1873 * of commands currently outstanding. 1874 */ 1875 dev->openings = 0; 1876 #ifdef AHD_DEBUG 1877 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1878 ahd_print_path(ahd, scb); 1879 printf("Dropping tag count to %d\n", 1880 dev->active); 1881 } 1882 #endif 1883 if (dev->active == dev->tags_on_last_queuefull) { 1884 1885 dev->last_queuefull_same_count++; 1886 /* 1887 * If we repeatedly see a queue full 1888 * at the same queue depth, this 1889 * device has a fixed number of tag 1890 * slots. Lock in this tag depth 1891 * so we stop seeing queue fulls from 1892 * this device. 1893 */ 1894 if (dev->last_queuefull_same_count 1895 == AHD_LOCK_TAGS_COUNT) { 1896 dev->maxtags = dev->active; 1897 ahd_print_path(ahd, scb); 1898 printf("Locking max tag count at %d\n", 1899 dev->active); 1900 } 1901 } else { 1902 dev->tags_on_last_queuefull = dev->active; 1903 dev->last_queuefull_same_count = 0; 1904 } 1905 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 1906 ahd_set_scsi_status(scb, SCSI_STATUS_OK); 1907 ahd_platform_set_tags(ahd, &devinfo, 1908 (dev->flags & AHD_DEV_Q_BASIC) 1909 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 1910 break; 1911 } 1912 /* 1913 * Drop down to a single opening, and treat this 1914 * as if the target returned BUSY SCSI status. 1915 */ 1916 dev->openings = 1; 1917 ahd_platform_set_tags(ahd, &devinfo, 1918 (dev->flags & AHD_DEV_Q_BASIC) 1919 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 1920 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); 1921 } 1922 } 1923 1924 static void 1925 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 1926 { 1927 /* 1928 * Map CAM error codes into Linux Error codes. We 1929 * avoid the conversion so that the DV code has the 1930 * full error information available when making 1931 * state change decisions. 1932 */ 1933 { 1934 uint32_t status; 1935 u_int new_status; 1936 1937 status = ahd_cmd_get_transaction_status(cmd); 1938 switch (status) { 1939 case CAM_REQ_INPROG: 1940 case CAM_REQ_CMP: 1941 case CAM_SCSI_STATUS_ERROR: 1942 new_status = DID_OK; 1943 break; 1944 case CAM_REQ_ABORTED: 1945 new_status = DID_ABORT; 1946 break; 1947 case CAM_BUSY: 1948 new_status = DID_BUS_BUSY; 1949 break; 1950 case CAM_REQ_INVALID: 1951 case CAM_PATH_INVALID: 1952 new_status = DID_BAD_TARGET; 1953 break; 1954 case CAM_SEL_TIMEOUT: 1955 new_status = DID_NO_CONNECT; 1956 break; 1957 case CAM_SCSI_BUS_RESET: 1958 case CAM_BDR_SENT: 1959 new_status = DID_RESET; 1960 break; 1961 case CAM_UNCOR_PARITY: 1962 new_status = DID_PARITY; 1963 break; 1964 case CAM_CMD_TIMEOUT: 1965 new_status = DID_TIME_OUT; 1966 break; 1967 case CAM_UA_ABORT: 1968 case CAM_REQ_CMP_ERR: 1969 case CAM_AUTOSENSE_FAIL: 1970 case CAM_NO_HBA: 1971 case CAM_DATA_RUN_ERR: 1972 case CAM_UNEXP_BUSFREE: 1973 case CAM_SEQUENCE_FAIL: 1974 case CAM_CCB_LEN_ERR: 1975 case CAM_PROVIDE_FAIL: 1976 case CAM_REQ_TERMIO: 1977 case CAM_UNREC_HBA_ERROR: 1978 case CAM_REQ_TOO_BIG: 1979 new_status = DID_ERROR; 1980 break; 1981 case CAM_REQUEUE_REQ: 1982 new_status = DID_REQUEUE; 1983 break; 1984 default: 1985 /* We should never get here */ 1986 new_status = DID_ERROR; 1987 break; 1988 } 1989 1990 ahd_cmd_set_transaction_status(cmd, new_status); 1991 } 1992 1993 cmd->scsi_done(cmd); 1994 } 1995 1996 static void 1997 ahd_linux_sem_timeout(u_long arg) 1998 { 1999 struct ahd_softc *ahd; 2000 u_long s; 2001 2002 ahd = (struct ahd_softc *)arg; 2003 2004 ahd_lock(ahd, &s); 2005 if ((ahd->platform_data->flags & AHD_SCB_UP_EH_SEM) != 0) { 2006 ahd->platform_data->flags &= ~AHD_SCB_UP_EH_SEM; 2007 up(&ahd->platform_data->eh_sem); 2008 } 2009 ahd_unlock(ahd, &s); 2010 } 2011 2012 void 2013 ahd_freeze_simq(struct ahd_softc *ahd) 2014 { 2015 ahd->platform_data->qfrozen++; 2016 if (ahd->platform_data->qfrozen == 1) { 2017 scsi_block_requests(ahd->platform_data->host); 2018 ahd_platform_abort_scbs(ahd, CAM_TARGET_WILDCARD, ALL_CHANNELS, 2019 CAM_LUN_WILDCARD, SCB_LIST_NULL, 2020 ROLE_INITIATOR, CAM_REQUEUE_REQ); 2021 } 2022 } 2023 2024 void 2025 ahd_release_simq(struct ahd_softc *ahd) 2026 { 2027 u_long s; 2028 int unblock_reqs; 2029 2030 unblock_reqs = 0; 2031 ahd_lock(ahd, &s); 2032 if (ahd->platform_data->qfrozen > 0) 2033 ahd->platform_data->qfrozen--; 2034 if (ahd->platform_data->qfrozen == 0) { 2035 unblock_reqs = 1; 2036 } 2037 ahd_unlock(ahd, &s); 2038 /* 2039 * There is still a race here. The mid-layer 2040 * should keep its own freeze count and use 2041 * a bottom half handler to run the queues 2042 * so we can unblock with our own lock held. 2043 */ 2044 if (unblock_reqs) 2045 scsi_unblock_requests(ahd->platform_data->host); 2046 } 2047 2048 static int 2049 ahd_linux_queue_recovery_cmd(struct scsi_cmnd *cmd, scb_flag flag) 2050 { 2051 struct ahd_softc *ahd; 2052 struct ahd_linux_device *dev; 2053 struct scb *pending_scb; 2054 u_int saved_scbptr; 2055 u_int active_scbptr; 2056 u_int last_phase; 2057 u_int saved_scsiid; 2058 u_int cdb_byte; 2059 int retval; 2060 int was_paused; 2061 int paused; 2062 int wait; 2063 int disconnected; 2064 ahd_mode_state saved_modes; 2065 2066 pending_scb = NULL; 2067 paused = FALSE; 2068 wait = FALSE; 2069 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2070 2071 scmd_printk(KERN_INFO, cmd, 2072 "Attempting to queue a%s message:", 2073 flag == SCB_ABORT ? "n ABORT" : " TARGET RESET"); 2074 2075 printf("CDB:"); 2076 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2077 printf(" 0x%x", cmd->cmnd[cdb_byte]); 2078 printf("\n"); 2079 2080 spin_lock_irq(&ahd->platform_data->spin_lock); 2081 2082 /* 2083 * First determine if we currently own this command. 2084 * Start by searching the device queue. If not found 2085 * there, check the pending_scb list. If not found 2086 * at all, and the system wanted us to just abort the 2087 * command, return success. 2088 */ 2089 dev = scsi_transport_device_data(cmd->device); 2090 2091 if (dev == NULL) { 2092 /* 2093 * No target device for this command exists, 2094 * so we must not still own the command. 2095 */ 2096 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2097 retval = SUCCESS; 2098 goto no_cmd; 2099 } 2100 2101 /* 2102 * See if we can find a matching cmd in the pending list. 2103 */ 2104 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2105 if (pending_scb->io_ctx == cmd) 2106 break; 2107 } 2108 2109 if (pending_scb == NULL && flag == SCB_DEVICE_RESET) { 2110 2111 /* Any SCB for this device will do for a target reset */ 2112 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2113 if (ahd_match_scb(ahd, pending_scb, 2114 scmd_id(cmd), 2115 scmd_channel(cmd) + 'A', 2116 CAM_LUN_WILDCARD, 2117 SCB_LIST_NULL, ROLE_INITIATOR) == 0) 2118 break; 2119 } 2120 } 2121 2122 if (pending_scb == NULL) { 2123 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2124 goto no_cmd; 2125 } 2126 2127 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2128 /* 2129 * We can't queue two recovery actions using the same SCB 2130 */ 2131 retval = FAILED; 2132 goto done; 2133 } 2134 2135 /* 2136 * Ensure that the card doesn't do anything 2137 * behind our back. Also make sure that we 2138 * didn't "just" miss an interrupt that would 2139 * affect this cmd. 2140 */ 2141 was_paused = ahd_is_paused(ahd); 2142 ahd_pause_and_flushwork(ahd); 2143 paused = TRUE; 2144 2145 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2146 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2147 goto no_cmd; 2148 } 2149 2150 printf("%s: At time of recovery, card was %spaused\n", 2151 ahd_name(ahd), was_paused ? "" : "not "); 2152 ahd_dump_card_state(ahd); 2153 2154 disconnected = TRUE; 2155 if (flag == SCB_ABORT) { 2156 if (ahd_search_qinfifo(ahd, cmd->device->id, 2157 cmd->device->channel + 'A', 2158 cmd->device->lun, 2159 pending_scb->hscb->tag, 2160 ROLE_INITIATOR, CAM_REQ_ABORTED, 2161 SEARCH_COMPLETE) > 0) { 2162 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2163 ahd_name(ahd), cmd->device->channel, 2164 cmd->device->id, cmd->device->lun); 2165 retval = SUCCESS; 2166 goto done; 2167 } 2168 } else if (ahd_search_qinfifo(ahd, cmd->device->id, 2169 cmd->device->channel + 'A', 2170 cmd->device->lun, pending_scb->hscb->tag, 2171 ROLE_INITIATOR, /*status*/0, 2172 SEARCH_COUNT) > 0) { 2173 disconnected = FALSE; 2174 } 2175 2176 saved_modes = ahd_save_modes(ahd); 2177 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2178 last_phase = ahd_inb(ahd, LASTPHASE); 2179 saved_scbptr = ahd_get_scbptr(ahd); 2180 active_scbptr = saved_scbptr; 2181 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2182 struct scb *bus_scb; 2183 2184 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2185 if (bus_scb == pending_scb) 2186 disconnected = FALSE; 2187 else if (flag != SCB_ABORT 2188 && ahd_inb(ahd, SAVED_SCSIID) == pending_scb->hscb->scsiid 2189 && ahd_inb(ahd, SAVED_LUN) == SCB_GET_LUN(pending_scb)) 2190 disconnected = FALSE; 2191 } 2192 2193 /* 2194 * At this point, pending_scb is the scb associated with the 2195 * passed in command. That command is currently active on the 2196 * bus or is in the disconnected state. 2197 */ 2198 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); 2199 if (last_phase != P_BUSFREE 2200 && (SCB_GET_TAG(pending_scb) == active_scbptr 2201 || (flag == SCB_DEVICE_RESET 2202 && SCSIID_TARGET(ahd, saved_scsiid) == scmd_id(cmd)))) { 2203 2204 /* 2205 * We're active on the bus, so assert ATN 2206 * and hope that the target responds. 2207 */ 2208 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2209 pending_scb->flags |= SCB_RECOVERY_SCB|flag; 2210 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2211 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2212 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2213 wait = TRUE; 2214 } else if (disconnected) { 2215 2216 /* 2217 * Actually re-queue this SCB in an attempt 2218 * to select the device before it reconnects. 2219 */ 2220 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2221 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2222 pending_scb->hscb->cdb_len = 0; 2223 pending_scb->hscb->task_attribute = 0; 2224 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2225 2226 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2227 /* 2228 * Mark the SCB has having an outstanding 2229 * task management function. Should the command 2230 * complete normally before the task management 2231 * function can be sent, the host will be notified 2232 * to abort our requeued SCB. 2233 */ 2234 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2235 pending_scb->hscb->task_management); 2236 } else { 2237 /* 2238 * If non-packetized, set the MK_MESSAGE control 2239 * bit indicating that we desire to send a message. 2240 * We also set the disconnected flag since there is 2241 * no guarantee that our SCB control byte matches 2242 * the version on the card. We don't want the 2243 * sequencer to abort the command thinking an 2244 * unsolicited reselection occurred. 2245 */ 2246 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2247 2248 /* 2249 * The sequencer will never re-reference the 2250 * in-core SCB. To make sure we are notified 2251 * during reslection, set the MK_MESSAGE flag in 2252 * the card's copy of the SCB. 2253 */ 2254 ahd_outb(ahd, SCB_CONTROL, 2255 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2256 } 2257 2258 /* 2259 * Clear out any entries in the QINFIFO first 2260 * so we are the next SCB for this target 2261 * to run. 2262 */ 2263 ahd_search_qinfifo(ahd, cmd->device->id, 2264 cmd->device->channel + 'A', cmd->device->lun, 2265 SCB_LIST_NULL, ROLE_INITIATOR, 2266 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2267 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2268 ahd_set_scbptr(ahd, saved_scbptr); 2269 ahd_print_path(ahd, pending_scb); 2270 printf("Device is disconnected, re-queuing SCB\n"); 2271 wait = TRUE; 2272 } else { 2273 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2274 retval = FAILED; 2275 goto done; 2276 } 2277 2278 no_cmd: 2279 /* 2280 * Our assumption is that if we don't have the command, no 2281 * recovery action was required, so we return success. Again, 2282 * the semantics of the mid-layer recovery engine are not 2283 * well defined, so this may change in time. 2284 */ 2285 retval = SUCCESS; 2286 done: 2287 if (paused) 2288 ahd_unpause(ahd); 2289 if (wait) { 2290 struct timer_list timer; 2291 int ret; 2292 2293 ahd->platform_data->flags |= AHD_SCB_UP_EH_SEM; 2294 spin_unlock_irq(&ahd->platform_data->spin_lock); 2295 init_timer(&timer); 2296 timer.data = (u_long)ahd; 2297 timer.expires = jiffies + (5 * HZ); 2298 timer.function = ahd_linux_sem_timeout; 2299 add_timer(&timer); 2300 printf("Recovery code sleeping\n"); 2301 down(&ahd->platform_data->eh_sem); 2302 printf("Recovery code awake\n"); 2303 ret = del_timer_sync(&timer); 2304 if (ret == 0) { 2305 printf("Timer Expired\n"); 2306 retval = FAILED; 2307 } 2308 spin_lock_irq(&ahd->platform_data->spin_lock); 2309 } 2310 spin_unlock_irq(&ahd->platform_data->spin_lock); 2311 return (retval); 2312 } 2313 2314 static void ahd_linux_set_width(struct scsi_target *starget, int width) 2315 { 2316 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2317 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2318 struct ahd_devinfo devinfo; 2319 unsigned long flags; 2320 2321 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2322 starget->channel + 'A', ROLE_INITIATOR); 2323 ahd_lock(ahd, &flags); 2324 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2325 ahd_unlock(ahd, &flags); 2326 } 2327 2328 static void ahd_linux_set_period(struct scsi_target *starget, int period) 2329 { 2330 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2331 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2332 struct ahd_tmode_tstate *tstate; 2333 struct ahd_initiator_tinfo *tinfo 2334 = ahd_fetch_transinfo(ahd, 2335 starget->channel + 'A', 2336 shost->this_id, starget->id, &tstate); 2337 struct ahd_devinfo devinfo; 2338 unsigned int ppr_options = tinfo->goal.ppr_options; 2339 unsigned int dt; 2340 unsigned long flags; 2341 unsigned long offset = tinfo->goal.offset; 2342 2343 #ifdef AHD_DEBUG 2344 if ((ahd_debug & AHD_SHOW_DV) != 0) 2345 printf("%s: set period to %d\n", ahd_name(ahd), period); 2346 #endif 2347 if (offset == 0) 2348 offset = MAX_OFFSET; 2349 2350 if (period < 8) 2351 period = 8; 2352 if (period < 10) { 2353 ppr_options |= MSG_EXT_PPR_DT_REQ; 2354 if (period == 8) 2355 ppr_options |= MSG_EXT_PPR_IU_REQ; 2356 } 2357 2358 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2359 2360 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2361 starget->channel + 'A', ROLE_INITIATOR); 2362 2363 /* all PPR requests apart from QAS require wide transfers */ 2364 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2365 if (spi_width(starget) == 0) 2366 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2367 } 2368 2369 ahd_find_syncrate(ahd, &period, &ppr_options, 2370 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2371 2372 ahd_lock(ahd, &flags); 2373 ahd_set_syncrate(ahd, &devinfo, period, offset, 2374 ppr_options, AHD_TRANS_GOAL, FALSE); 2375 ahd_unlock(ahd, &flags); 2376 } 2377 2378 static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2379 { 2380 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2381 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2382 struct ahd_tmode_tstate *tstate; 2383 struct ahd_initiator_tinfo *tinfo 2384 = ahd_fetch_transinfo(ahd, 2385 starget->channel + 'A', 2386 shost->this_id, starget->id, &tstate); 2387 struct ahd_devinfo devinfo; 2388 unsigned int ppr_options = 0; 2389 unsigned int period = 0; 2390 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2391 unsigned long flags; 2392 2393 #ifdef AHD_DEBUG 2394 if ((ahd_debug & AHD_SHOW_DV) != 0) 2395 printf("%s: set offset to %d\n", ahd_name(ahd), offset); 2396 #endif 2397 2398 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2399 starget->channel + 'A', ROLE_INITIATOR); 2400 if (offset != 0) { 2401 period = tinfo->goal.period; 2402 ppr_options = tinfo->goal.ppr_options; 2403 ahd_find_syncrate(ahd, &period, &ppr_options, 2404 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2405 } 2406 2407 ahd_lock(ahd, &flags); 2408 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2409 AHD_TRANS_GOAL, FALSE); 2410 ahd_unlock(ahd, &flags); 2411 } 2412 2413 static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2414 { 2415 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2416 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2417 struct ahd_tmode_tstate *tstate; 2418 struct ahd_initiator_tinfo *tinfo 2419 = ahd_fetch_transinfo(ahd, 2420 starget->channel + 'A', 2421 shost->this_id, starget->id, &tstate); 2422 struct ahd_devinfo devinfo; 2423 unsigned int ppr_options = tinfo->goal.ppr_options 2424 & ~MSG_EXT_PPR_DT_REQ; 2425 unsigned int period = tinfo->goal.period; 2426 unsigned int width = tinfo->goal.width; 2427 unsigned long flags; 2428 2429 #ifdef AHD_DEBUG 2430 if ((ahd_debug & AHD_SHOW_DV) != 0) 2431 printf("%s: %s DT\n", ahd_name(ahd), 2432 dt ? "enabling" : "disabling"); 2433 #endif 2434 if (dt) { 2435 ppr_options |= MSG_EXT_PPR_DT_REQ; 2436 if (!width) 2437 ahd_linux_set_width(starget, 1); 2438 } else { 2439 if (period <= 9) 2440 period = 10; /* If resetting DT, period must be >= 25ns */ 2441 /* IU is invalid without DT set */ 2442 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2443 } 2444 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2445 starget->channel + 'A', ROLE_INITIATOR); 2446 ahd_find_syncrate(ahd, &period, &ppr_options, 2447 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2448 2449 ahd_lock(ahd, &flags); 2450 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2451 ppr_options, AHD_TRANS_GOAL, FALSE); 2452 ahd_unlock(ahd, &flags); 2453 } 2454 2455 static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2456 { 2457 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2458 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2459 struct ahd_tmode_tstate *tstate; 2460 struct ahd_initiator_tinfo *tinfo 2461 = ahd_fetch_transinfo(ahd, 2462 starget->channel + 'A', 2463 shost->this_id, starget->id, &tstate); 2464 struct ahd_devinfo devinfo; 2465 unsigned int ppr_options = tinfo->goal.ppr_options 2466 & ~MSG_EXT_PPR_QAS_REQ; 2467 unsigned int period = tinfo->goal.period; 2468 unsigned int dt; 2469 unsigned long flags; 2470 2471 #ifdef AHD_DEBUG 2472 if ((ahd_debug & AHD_SHOW_DV) != 0) 2473 printf("%s: %s QAS\n", ahd_name(ahd), 2474 qas ? "enabling" : "disabling"); 2475 #endif 2476 2477 if (qas) { 2478 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2479 } 2480 2481 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2482 2483 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2484 starget->channel + 'A', ROLE_INITIATOR); 2485 ahd_find_syncrate(ahd, &period, &ppr_options, 2486 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2487 2488 ahd_lock(ahd, &flags); 2489 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2490 ppr_options, AHD_TRANS_GOAL, FALSE); 2491 ahd_unlock(ahd, &flags); 2492 } 2493 2494 static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 2495 { 2496 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2497 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2498 struct ahd_tmode_tstate *tstate; 2499 struct ahd_initiator_tinfo *tinfo 2500 = ahd_fetch_transinfo(ahd, 2501 starget->channel + 'A', 2502 shost->this_id, starget->id, &tstate); 2503 struct ahd_devinfo devinfo; 2504 unsigned int ppr_options = tinfo->goal.ppr_options 2505 & ~MSG_EXT_PPR_IU_REQ; 2506 unsigned int period = tinfo->goal.period; 2507 unsigned int dt; 2508 unsigned long flags; 2509 2510 #ifdef AHD_DEBUG 2511 if ((ahd_debug & AHD_SHOW_DV) != 0) 2512 printf("%s: %s IU\n", ahd_name(ahd), 2513 iu ? "enabling" : "disabling"); 2514 #endif 2515 2516 if (iu) { 2517 ppr_options |= MSG_EXT_PPR_IU_REQ; 2518 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2519 } 2520 2521 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2522 2523 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2524 starget->channel + 'A', ROLE_INITIATOR); 2525 ahd_find_syncrate(ahd, &period, &ppr_options, 2526 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2527 2528 ahd_lock(ahd, &flags); 2529 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2530 ppr_options, AHD_TRANS_GOAL, FALSE); 2531 ahd_unlock(ahd, &flags); 2532 } 2533 2534 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2535 { 2536 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2537 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2538 struct ahd_tmode_tstate *tstate; 2539 struct ahd_initiator_tinfo *tinfo 2540 = ahd_fetch_transinfo(ahd, 2541 starget->channel + 'A', 2542 shost->this_id, starget->id, &tstate); 2543 struct ahd_devinfo devinfo; 2544 unsigned int ppr_options = tinfo->goal.ppr_options 2545 & ~MSG_EXT_PPR_RD_STRM; 2546 unsigned int period = tinfo->goal.period; 2547 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2548 unsigned long flags; 2549 2550 #ifdef AHD_DEBUG 2551 if ((ahd_debug & AHD_SHOW_DV) != 0) 2552 printf("%s: %s Read Streaming\n", ahd_name(ahd), 2553 rdstrm ? "enabling" : "disabling"); 2554 #endif 2555 2556 if (rdstrm) 2557 ppr_options |= MSG_EXT_PPR_RD_STRM; 2558 2559 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2560 starget->channel + 'A', ROLE_INITIATOR); 2561 ahd_find_syncrate(ahd, &period, &ppr_options, 2562 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2563 2564 ahd_lock(ahd, &flags); 2565 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2566 ppr_options, AHD_TRANS_GOAL, FALSE); 2567 ahd_unlock(ahd, &flags); 2568 } 2569 2570 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2571 { 2572 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2573 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2574 struct ahd_tmode_tstate *tstate; 2575 struct ahd_initiator_tinfo *tinfo 2576 = ahd_fetch_transinfo(ahd, 2577 starget->channel + 'A', 2578 shost->this_id, starget->id, &tstate); 2579 struct ahd_devinfo devinfo; 2580 unsigned int ppr_options = tinfo->goal.ppr_options 2581 & ~MSG_EXT_PPR_WR_FLOW; 2582 unsigned int period = tinfo->goal.period; 2583 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2584 unsigned long flags; 2585 2586 #ifdef AHD_DEBUG 2587 if ((ahd_debug & AHD_SHOW_DV) != 0) 2588 printf("%s: %s Write Flow Control\n", ahd_name(ahd), 2589 wrflow ? "enabling" : "disabling"); 2590 #endif 2591 2592 if (wrflow) 2593 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2594 2595 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2596 starget->channel + 'A', ROLE_INITIATOR); 2597 ahd_find_syncrate(ahd, &period, &ppr_options, 2598 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2599 2600 ahd_lock(ahd, &flags); 2601 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2602 ppr_options, AHD_TRANS_GOAL, FALSE); 2603 ahd_unlock(ahd, &flags); 2604 } 2605 2606 static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2607 { 2608 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2609 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2610 struct ahd_tmode_tstate *tstate; 2611 struct ahd_initiator_tinfo *tinfo 2612 = ahd_fetch_transinfo(ahd, 2613 starget->channel + 'A', 2614 shost->this_id, starget->id, &tstate); 2615 struct ahd_devinfo devinfo; 2616 unsigned int ppr_options = tinfo->goal.ppr_options 2617 & ~MSG_EXT_PPR_RTI; 2618 unsigned int period = tinfo->goal.period; 2619 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2620 unsigned long flags; 2621 2622 if ((ahd->features & AHD_RTI) == 0) { 2623 #ifdef AHD_DEBUG 2624 if ((ahd_debug & AHD_SHOW_DV) != 0) 2625 printf("%s: RTI not available\n", ahd_name(ahd)); 2626 #endif 2627 return; 2628 } 2629 2630 #ifdef AHD_DEBUG 2631 if ((ahd_debug & AHD_SHOW_DV) != 0) 2632 printf("%s: %s RTI\n", ahd_name(ahd), 2633 rti ? "enabling" : "disabling"); 2634 #endif 2635 2636 if (rti) 2637 ppr_options |= MSG_EXT_PPR_RTI; 2638 2639 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2640 starget->channel + 'A', ROLE_INITIATOR); 2641 ahd_find_syncrate(ahd, &period, &ppr_options, 2642 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2643 2644 ahd_lock(ahd, &flags); 2645 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2646 ppr_options, AHD_TRANS_GOAL, FALSE); 2647 ahd_unlock(ahd, &flags); 2648 } 2649 2650 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2651 { 2652 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2653 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2654 struct ahd_tmode_tstate *tstate; 2655 struct ahd_initiator_tinfo *tinfo 2656 = ahd_fetch_transinfo(ahd, 2657 starget->channel + 'A', 2658 shost->this_id, starget->id, &tstate); 2659 struct ahd_devinfo devinfo; 2660 unsigned int ppr_options = tinfo->goal.ppr_options 2661 & ~MSG_EXT_PPR_PCOMP_EN; 2662 unsigned int period = tinfo->goal.period; 2663 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2664 unsigned long flags; 2665 2666 #ifdef AHD_DEBUG 2667 if ((ahd_debug & AHD_SHOW_DV) != 0) 2668 printf("%s: %s Precompensation\n", ahd_name(ahd), 2669 pcomp ? "Enable" : "Disable"); 2670 #endif 2671 2672 if (pcomp) 2673 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2674 2675 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2676 starget->channel + 'A', ROLE_INITIATOR); 2677 ahd_find_syncrate(ahd, &period, &ppr_options, 2678 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2679 2680 ahd_lock(ahd, &flags); 2681 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2682 ppr_options, AHD_TRANS_GOAL, FALSE); 2683 ahd_unlock(ahd, &flags); 2684 } 2685 2686 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2687 { 2688 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2689 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2690 struct ahd_tmode_tstate *tstate; 2691 struct ahd_initiator_tinfo *tinfo 2692 = ahd_fetch_transinfo(ahd, 2693 starget->channel + 'A', 2694 shost->this_id, starget->id, &tstate); 2695 struct ahd_devinfo devinfo; 2696 unsigned int ppr_options = tinfo->goal.ppr_options 2697 & ~MSG_EXT_PPR_HOLD_MCS; 2698 unsigned int period = tinfo->goal.period; 2699 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2700 unsigned long flags; 2701 2702 if (hold) 2703 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2704 2705 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2706 starget->channel + 'A', ROLE_INITIATOR); 2707 ahd_find_syncrate(ahd, &period, &ppr_options, 2708 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2709 2710 ahd_lock(ahd, &flags); 2711 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2712 ppr_options, AHD_TRANS_GOAL, FALSE); 2713 ahd_unlock(ahd, &flags); 2714 } 2715 2716 2717 2718 static struct spi_function_template ahd_linux_transport_functions = { 2719 .set_offset = ahd_linux_set_offset, 2720 .show_offset = 1, 2721 .set_period = ahd_linux_set_period, 2722 .show_period = 1, 2723 .set_width = ahd_linux_set_width, 2724 .show_width = 1, 2725 .set_dt = ahd_linux_set_dt, 2726 .show_dt = 1, 2727 .set_iu = ahd_linux_set_iu, 2728 .show_iu = 1, 2729 .set_qas = ahd_linux_set_qas, 2730 .show_qas = 1, 2731 .set_rd_strm = ahd_linux_set_rd_strm, 2732 .show_rd_strm = 1, 2733 .set_wr_flow = ahd_linux_set_wr_flow, 2734 .show_wr_flow = 1, 2735 .set_rti = ahd_linux_set_rti, 2736 .show_rti = 1, 2737 .set_pcomp_en = ahd_linux_set_pcomp_en, 2738 .show_pcomp_en = 1, 2739 .set_hold_mcs = ahd_linux_set_hold_mcs, 2740 .show_hold_mcs = 1, 2741 }; 2742 2743 static int __init 2744 ahd_linux_init(void) 2745 { 2746 int error = 0; 2747 2748 /* 2749 * If we've been passed any parameters, process them now. 2750 */ 2751 if (aic79xx) 2752 aic79xx_setup(aic79xx); 2753 2754 ahd_linux_transport_template = 2755 spi_attach_transport(&ahd_linux_transport_functions); 2756 if (!ahd_linux_transport_template) 2757 return -ENODEV; 2758 2759 scsi_transport_reserve_target(ahd_linux_transport_template, 2760 sizeof(struct ahd_linux_target)); 2761 scsi_transport_reserve_device(ahd_linux_transport_template, 2762 sizeof(struct ahd_linux_device)); 2763 2764 error = ahd_linux_pci_init(); 2765 if (error) 2766 spi_release_transport(ahd_linux_transport_template); 2767 return error; 2768 } 2769 2770 static void __exit 2771 ahd_linux_exit(void) 2772 { 2773 ahd_linux_pci_exit(); 2774 spi_release_transport(ahd_linux_transport_template); 2775 } 2776 2777 module_init(ahd_linux_init); 2778 module_exit(ahd_linux_exit); 2779