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 /* Some storage boxes are using an LSI chip which has a bug making it 318 * impossible to use aic79xx Rev B chip in 320 speeds. The following 319 * storage boxes have been reported to be buggy: 320 * EonStor 3U 16-Bay: U16U-G3A3 321 * EonStor 2U 12-Bay: U12U-G3A3 322 * SentinelRAID: 2500F R5 / R6 323 * SentinelRAID: 2500F R1 324 * SentinelRAID: 2500F/1500F 325 * SentinelRAID: 150F 326 * 327 * To get around this LSI bug, you can set your board to 160 mode 328 * or you can enable the SLOWCRC bit. 329 */ 330 uint32_t aic79xx_slowcrc; 331 332 /* 333 * Module information and settable options. 334 */ 335 static char *aic79xx = NULL; 336 337 MODULE_AUTHOR("Maintainer: Justin T. Gibbs <gibbs@scsiguy.com>"); 338 MODULE_DESCRIPTION("Adaptec Aic790X U320 SCSI Host Bus Adapter driver"); 339 MODULE_LICENSE("Dual BSD/GPL"); 340 MODULE_VERSION(AIC79XX_DRIVER_VERSION); 341 module_param(aic79xx, charp, 0444); 342 MODULE_PARM_DESC(aic79xx, 343 "period delimited, options string.\n" 344 " verbose Enable verbose/diagnostic logging\n" 345 " allow_memio Allow device registers to be memory mapped\n" 346 " debug Bitmask of debug values to enable\n" 347 " no_reset Supress initial bus resets\n" 348 " extended Enable extended geometry on all controllers\n" 349 " periodic_otag Send an ordered tagged transaction\n" 350 " periodically to prevent tag starvation.\n" 351 " This may be required by some older disk\n" 352 " or drives/RAID arrays.\n" 353 " reverse_scan Sort PCI devices highest Bus/Slot to lowest\n" 354 " tag_info:<tag_str> Set per-target tag depth\n" 355 " global_tag_depth:<int> Global tag depth for all targets on all buses\n" 356 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" 357 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n" 358 " amplitude:<int> Set the signal amplitude (0-7).\n" 359 " seltime:<int> Selection Timeout:\n" 360 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 361 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n" 362 "\n" 363 " Sample /etc/modprobe.conf line:\n" 364 " Enable verbose logging\n" 365 " Set tag depth on Controller 2/Target 2 to 10 tags\n" 366 " Shorten the selection timeout to 128ms\n" 367 "\n" 368 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" 369 "\n"); 370 371 static void ahd_linux_handle_scsi_status(struct ahd_softc *, 372 struct scsi_device *, 373 struct scb *); 374 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, 375 struct scsi_cmnd *cmd); 376 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd); 377 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); 378 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, 379 struct ahd_devinfo *devinfo); 380 static void ahd_linux_device_queue_depth(struct scsi_device *); 381 static int ahd_linux_run_command(struct ahd_softc*, 382 struct ahd_linux_device *, 383 struct scsi_cmnd *); 384 static void ahd_linux_setup_tag_info_global(char *p); 385 static int aic79xx_setup(char *c); 386 387 static int ahd_linux_unit; 388 389 390 /****************************** Inlines ***************************************/ 391 static __inline void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); 392 393 static __inline void 394 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) 395 { 396 struct scsi_cmnd *cmd; 397 int direction; 398 399 cmd = scb->io_ctx; 400 direction = cmd->sc_data_direction; 401 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); 402 if (cmd->use_sg != 0) { 403 struct scatterlist *sg; 404 405 sg = (struct scatterlist *)cmd->request_buffer; 406 pci_unmap_sg(ahd->dev_softc, sg, cmd->use_sg, direction); 407 } else if (cmd->request_bufflen != 0) { 408 pci_unmap_single(ahd->dev_softc, 409 scb->platform_data->buf_busaddr, 410 cmd->request_bufflen, direction); 411 } 412 } 413 414 /******************************** Macros **************************************/ 415 #define BUILD_SCSIID(ahd, cmd) \ 416 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id) 417 418 /* 419 * Return a string describing the driver. 420 */ 421 static const char * 422 ahd_linux_info(struct Scsi_Host *host) 423 { 424 static char buffer[512]; 425 char ahd_info[256]; 426 char *bp; 427 struct ahd_softc *ahd; 428 429 bp = &buffer[0]; 430 ahd = *(struct ahd_softc **)host->hostdata; 431 memset(bp, 0, sizeof(buffer)); 432 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev "); 433 strcat(bp, AIC79XX_DRIVER_VERSION); 434 strcat(bp, "\n"); 435 strcat(bp, " <"); 436 strcat(bp, ahd->description); 437 strcat(bp, ">\n"); 438 strcat(bp, " "); 439 ahd_controller_info(ahd, ahd_info); 440 strcat(bp, ahd_info); 441 strcat(bp, "\n"); 442 443 return (bp); 444 } 445 446 /* 447 * Queue an SCB to the controller. 448 */ 449 static int 450 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 451 { 452 struct ahd_softc *ahd; 453 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device); 454 int rtn = SCSI_MLQUEUE_HOST_BUSY; 455 456 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 457 458 cmd->scsi_done = scsi_done; 459 cmd->result = CAM_REQ_INPROG << 16; 460 rtn = ahd_linux_run_command(ahd, dev, cmd); 461 462 return rtn; 463 } 464 465 static inline struct scsi_target ** 466 ahd_linux_target_in_softc(struct scsi_target *starget) 467 { 468 struct ahd_softc *ahd = 469 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 470 unsigned int target_offset; 471 472 target_offset = starget->id; 473 if (starget->channel != 0) 474 target_offset += 8; 475 476 return &ahd->platform_data->starget[target_offset]; 477 } 478 479 static int 480 ahd_linux_target_alloc(struct scsi_target *starget) 481 { 482 struct ahd_softc *ahd = 483 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 484 struct seeprom_config *sc = ahd->seep_config; 485 unsigned long flags; 486 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 487 struct ahd_linux_target *targ = scsi_transport_target_data(starget); 488 struct ahd_devinfo devinfo; 489 struct ahd_initiator_tinfo *tinfo; 490 struct ahd_tmode_tstate *tstate; 491 char channel = starget->channel + 'A'; 492 493 ahd_lock(ahd, &flags); 494 495 BUG_ON(*ahd_targp != NULL); 496 497 *ahd_targp = starget; 498 memset(targ, 0, sizeof(*targ)); 499 500 if (sc) { 501 int flags = sc->device_flags[starget->id]; 502 503 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 504 starget->id, &tstate); 505 506 if ((flags & CFPACKETIZED) == 0) { 507 /* Do not negotiate packetized transfers */ 508 spi_rd_strm(starget) = 0; 509 spi_pcomp_en(starget) = 0; 510 spi_rti(starget) = 0; 511 spi_wr_flow(starget) = 0; 512 spi_hold_mcs(starget) = 0; 513 } else { 514 if ((ahd->features & AHD_RTI) == 0) 515 spi_rti(starget) = 0; 516 } 517 518 if ((flags & CFQAS) == 0) 519 spi_qas(starget) = 0; 520 521 /* Transinfo values have been set to BIOS settings */ 522 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 523 spi_min_period(starget) = tinfo->user.period; 524 spi_max_offset(starget) = tinfo->user.offset; 525 } 526 527 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 528 starget->id, &tstate); 529 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id, 530 CAM_LUN_WILDCARD, channel, 531 ROLE_INITIATOR); 532 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, 533 AHD_TRANS_GOAL, /*paused*/FALSE); 534 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 535 AHD_TRANS_GOAL, /*paused*/FALSE); 536 ahd_unlock(ahd, &flags); 537 538 return 0; 539 } 540 541 static void 542 ahd_linux_target_destroy(struct scsi_target *starget) 543 { 544 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 545 546 *ahd_targp = NULL; 547 } 548 549 static int 550 ahd_linux_slave_alloc(struct scsi_device *sdev) 551 { 552 struct ahd_softc *ahd = 553 *((struct ahd_softc **)sdev->host->hostdata); 554 struct scsi_target *starget = sdev->sdev_target; 555 struct ahd_linux_target *targ = scsi_transport_target_data(starget); 556 struct ahd_linux_device *dev; 557 558 if (bootverbose) 559 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id); 560 561 BUG_ON(targ->sdev[sdev->lun] != NULL); 562 563 dev = scsi_transport_device_data(sdev); 564 memset(dev, 0, sizeof(*dev)); 565 566 /* 567 * We start out life using untagged 568 * transactions of which we allow one. 569 */ 570 dev->openings = 1; 571 572 /* 573 * Set maxtags to 0. This will be changed if we 574 * later determine that we are dealing with 575 * a tagged queuing capable device. 576 */ 577 dev->maxtags = 0; 578 579 targ->sdev[sdev->lun] = sdev; 580 581 return (0); 582 } 583 584 static int 585 ahd_linux_slave_configure(struct scsi_device *sdev) 586 { 587 struct ahd_softc *ahd; 588 589 ahd = *((struct ahd_softc **)sdev->host->hostdata); 590 if (bootverbose) 591 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 592 593 ahd_linux_device_queue_depth(sdev); 594 595 /* Initial Domain Validation */ 596 if (!spi_initial_dv(sdev->sdev_target)) 597 spi_dv_device(sdev); 598 599 return 0; 600 } 601 602 static void 603 ahd_linux_slave_destroy(struct scsi_device *sdev) 604 { 605 struct ahd_softc *ahd; 606 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 607 struct ahd_linux_target *targ = scsi_transport_target_data(sdev->sdev_target); 608 609 ahd = *((struct ahd_softc **)sdev->host->hostdata); 610 if (bootverbose) 611 printf("%s: Slave Destroy %d\n", ahd_name(ahd), sdev->id); 612 613 BUG_ON(dev->active); 614 615 targ->sdev[sdev->lun] = NULL; 616 617 } 618 619 #if defined(__i386__) 620 /* 621 * Return the disk geometry for the given SCSI device. 622 */ 623 static int 624 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 625 sector_t capacity, int geom[]) 626 { 627 uint8_t *bh; 628 int heads; 629 int sectors; 630 int cylinders; 631 int ret; 632 int extended; 633 struct ahd_softc *ahd; 634 635 ahd = *((struct ahd_softc **)sdev->host->hostdata); 636 637 bh = scsi_bios_ptable(bdev); 638 if (bh) { 639 ret = scsi_partsize(bh, capacity, 640 &geom[2], &geom[0], &geom[1]); 641 kfree(bh); 642 if (ret != -1) 643 return (ret); 644 } 645 heads = 64; 646 sectors = 32; 647 cylinders = aic_sector_div(capacity, heads, sectors); 648 649 if (aic79xx_extended != 0) 650 extended = 1; 651 else 652 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 653 if (extended && cylinders >= 1024) { 654 heads = 255; 655 sectors = 63; 656 cylinders = aic_sector_div(capacity, heads, sectors); 657 } 658 geom[0] = heads; 659 geom[1] = sectors; 660 geom[2] = cylinders; 661 return (0); 662 } 663 #endif 664 665 /* 666 * Abort the current SCSI command(s). 667 */ 668 static int 669 ahd_linux_abort(struct scsi_cmnd *cmd) 670 { 671 int error; 672 673 error = ahd_linux_queue_abort_cmd(cmd); 674 675 return error; 676 } 677 678 /* 679 * Attempt to send a target reset message to the device that timed out. 680 */ 681 static int 682 ahd_linux_dev_reset(struct scsi_cmnd *cmd) 683 { 684 struct ahd_softc *ahd; 685 struct ahd_linux_device *dev; 686 struct scb *reset_scb; 687 u_int cdb_byte; 688 int retval = SUCCESS; 689 int paused; 690 int wait; 691 struct ahd_initiator_tinfo *tinfo; 692 struct ahd_tmode_tstate *tstate; 693 unsigned long flags; 694 DECLARE_COMPLETION(done); 695 696 reset_scb = NULL; 697 paused = FALSE; 698 wait = FALSE; 699 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 700 701 scmd_printk(KERN_INFO, cmd, 702 "Attempting to queue a TARGET RESET message:"); 703 704 printf("CDB:"); 705 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 706 printf(" 0x%x", cmd->cmnd[cdb_byte]); 707 printf("\n"); 708 709 /* 710 * Determine if we currently own this command. 711 */ 712 dev = scsi_transport_device_data(cmd->device); 713 714 if (dev == NULL) { 715 /* 716 * No target device for this command exists, 717 * so we must not still own the command. 718 */ 719 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 720 return SUCCESS; 721 } 722 723 /* 724 * Generate us a new SCB 725 */ 726 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); 727 if (!reset_scb) { 728 scmd_printk(KERN_INFO, cmd, "No SCB available\n"); 729 return FAILED; 730 } 731 732 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 733 cmd->device->id, &tstate); 734 reset_scb->io_ctx = cmd; 735 reset_scb->platform_data->dev = dev; 736 reset_scb->sg_count = 0; 737 ahd_set_residual(reset_scb, 0); 738 ahd_set_sense_residual(reset_scb, 0); 739 reset_scb->platform_data->xfer_len = 0; 740 reset_scb->hscb->control = 0; 741 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd); 742 reset_scb->hscb->lun = cmd->device->lun; 743 reset_scb->hscb->cdb_len = 0; 744 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; 745 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; 746 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 747 reset_scb->flags |= SCB_PACKETIZED; 748 } else { 749 reset_scb->hscb->control |= MK_MESSAGE; 750 } 751 dev->openings--; 752 dev->active++; 753 dev->commands_issued++; 754 755 ahd_lock(ahd, &flags); 756 757 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); 758 ahd_queue_scb(ahd, reset_scb); 759 760 ahd->platform_data->eh_done = &done; 761 ahd_unlock(ahd, &flags); 762 763 printf("%s: Device reset code sleeping\n", ahd_name(ahd)); 764 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 765 ahd_lock(ahd, &flags); 766 ahd->platform_data->eh_done = NULL; 767 ahd_unlock(ahd, &flags); 768 printf("%s: Device reset timer expired (active %d)\n", 769 ahd_name(ahd), dev->active); 770 retval = FAILED; 771 } 772 printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); 773 774 return (retval); 775 } 776 777 /* 778 * Reset the SCSI bus. 779 */ 780 static int 781 ahd_linux_bus_reset(struct scsi_cmnd *cmd) 782 { 783 struct ahd_softc *ahd; 784 int found; 785 unsigned long flags; 786 787 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 788 #ifdef AHD_DEBUG 789 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 790 printf("%s: Bus reset called for cmd %p\n", 791 ahd_name(ahd), cmd); 792 #endif 793 ahd_lock(ahd, &flags); 794 795 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 796 /*initiate reset*/TRUE); 797 ahd_unlock(ahd, &flags); 798 799 if (bootverbose) 800 printf("%s: SCSI bus reset delivered. " 801 "%d SCBs aborted.\n", ahd_name(ahd), found); 802 803 return (SUCCESS); 804 } 805 806 struct scsi_host_template aic79xx_driver_template = { 807 .module = THIS_MODULE, 808 .name = "aic79xx", 809 .proc_name = "aic79xx", 810 .proc_info = ahd_linux_proc_info, 811 .info = ahd_linux_info, 812 .queuecommand = ahd_linux_queue, 813 .eh_abort_handler = ahd_linux_abort, 814 .eh_device_reset_handler = ahd_linux_dev_reset, 815 .eh_bus_reset_handler = ahd_linux_bus_reset, 816 #if defined(__i386__) 817 .bios_param = ahd_linux_biosparam, 818 #endif 819 .can_queue = AHD_MAX_QUEUE, 820 .this_id = -1, 821 .cmd_per_lun = 2, 822 .use_clustering = ENABLE_CLUSTERING, 823 .slave_alloc = ahd_linux_slave_alloc, 824 .slave_configure = ahd_linux_slave_configure, 825 .slave_destroy = ahd_linux_slave_destroy, 826 .target_alloc = ahd_linux_target_alloc, 827 .target_destroy = ahd_linux_target_destroy, 828 }; 829 830 /******************************** Bus DMA *************************************/ 831 int 832 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 833 bus_size_t alignment, bus_size_t boundary, 834 dma_addr_t lowaddr, dma_addr_t highaddr, 835 bus_dma_filter_t *filter, void *filterarg, 836 bus_size_t maxsize, int nsegments, 837 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 838 { 839 bus_dma_tag_t dmat; 840 841 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); 842 if (dmat == NULL) 843 return (ENOMEM); 844 845 /* 846 * Linux is very simplistic about DMA memory. For now don't 847 * maintain all specification information. Once Linux supplies 848 * better facilities for doing these operations, or the 849 * needs of this particular driver change, we might need to do 850 * more here. 851 */ 852 dmat->alignment = alignment; 853 dmat->boundary = boundary; 854 dmat->maxsize = maxsize; 855 *ret_tag = dmat; 856 return (0); 857 } 858 859 void 860 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 861 { 862 free(dmat, M_DEVBUF); 863 } 864 865 int 866 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 867 int flags, bus_dmamap_t *mapp) 868 { 869 *vaddr = pci_alloc_consistent(ahd->dev_softc, 870 dmat->maxsize, mapp); 871 if (*vaddr == NULL) 872 return (ENOMEM); 873 return(0); 874 } 875 876 void 877 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 878 void* vaddr, bus_dmamap_t map) 879 { 880 pci_free_consistent(ahd->dev_softc, dmat->maxsize, 881 vaddr, map); 882 } 883 884 int 885 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 886 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 887 void *cb_arg, int flags) 888 { 889 /* 890 * Assume for now that this will only be used during 891 * initialization and not for per-transaction buffer mapping. 892 */ 893 bus_dma_segment_t stack_sg; 894 895 stack_sg.ds_addr = map; 896 stack_sg.ds_len = dmat->maxsize; 897 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 898 return (0); 899 } 900 901 void 902 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 903 { 904 } 905 906 int 907 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 908 { 909 /* Nothing to do */ 910 return (0); 911 } 912 913 /********************* Platform Dependent Functions ***************************/ 914 static void 915 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 916 { 917 918 if ((instance >= 0) 919 && (instance < NUM_ELEMENTS(aic79xx_iocell_info))) { 920 uint8_t *iocell_info; 921 922 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 923 iocell_info[index] = value & 0xFFFF; 924 if (bootverbose) 925 printf("iocell[%d:%ld] = %d\n", instance, index, value); 926 } 927 } 928 929 static void 930 ahd_linux_setup_tag_info_global(char *p) 931 { 932 int tags, i, j; 933 934 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 935 printf("Setting Global Tags= %d\n", tags); 936 937 for (i = 0; i < NUM_ELEMENTS(aic79xx_tag_info); i++) { 938 for (j = 0; j < AHD_NUM_TARGETS; j++) { 939 aic79xx_tag_info[i].tag_commands[j] = tags; 940 } 941 } 942 } 943 944 static void 945 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 946 { 947 948 if ((instance >= 0) && (targ >= 0) 949 && (instance < NUM_ELEMENTS(aic79xx_tag_info)) 950 && (targ < AHD_NUM_TARGETS)) { 951 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 952 if (bootverbose) 953 printf("tag_info[%d:%d] = %d\n", instance, targ, value); 954 } 955 } 956 957 static char * 958 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 959 void (*callback)(u_long, int, int, int32_t), 960 u_long callback_arg) 961 { 962 char *tok_end; 963 char *tok_end2; 964 int i; 965 int instance; 966 int targ; 967 int done; 968 char tok_list[] = {'.', ',', '{', '}', '\0'}; 969 970 /* All options use a ':' name/arg separator */ 971 if (*opt_arg != ':') 972 return (opt_arg); 973 opt_arg++; 974 instance = -1; 975 targ = -1; 976 done = FALSE; 977 /* 978 * Restore separator that may be in 979 * the middle of our option argument. 980 */ 981 tok_end = strchr(opt_arg, '\0'); 982 if (tok_end < end) 983 *tok_end = ','; 984 while (!done) { 985 switch (*opt_arg) { 986 case '{': 987 if (instance == -1) { 988 instance = 0; 989 } else { 990 if (depth > 1) { 991 if (targ == -1) 992 targ = 0; 993 } else { 994 printf("Malformed Option %s\n", 995 opt_name); 996 done = TRUE; 997 } 998 } 999 opt_arg++; 1000 break; 1001 case '}': 1002 if (targ != -1) 1003 targ = -1; 1004 else if (instance != -1) 1005 instance = -1; 1006 opt_arg++; 1007 break; 1008 case ',': 1009 case '.': 1010 if (instance == -1) 1011 done = TRUE; 1012 else if (targ >= 0) 1013 targ++; 1014 else if (instance >= 0) 1015 instance++; 1016 opt_arg++; 1017 break; 1018 case '\0': 1019 done = TRUE; 1020 break; 1021 default: 1022 tok_end = end; 1023 for (i = 0; tok_list[i]; i++) { 1024 tok_end2 = strchr(opt_arg, tok_list[i]); 1025 if ((tok_end2) && (tok_end2 < tok_end)) 1026 tok_end = tok_end2; 1027 } 1028 callback(callback_arg, instance, targ, 1029 simple_strtol(opt_arg, NULL, 0)); 1030 opt_arg = tok_end; 1031 break; 1032 } 1033 } 1034 return (opt_arg); 1035 } 1036 1037 /* 1038 * Handle Linux boot parameters. This routine allows for assigning a value 1039 * to a parameter with a ':' between the parameter and the value. 1040 * ie. aic79xx=stpwlev:1,extended 1041 */ 1042 static int 1043 aic79xx_setup(char *s) 1044 { 1045 int i, n; 1046 char *p; 1047 char *end; 1048 1049 static struct { 1050 const char *name; 1051 uint32_t *flag; 1052 } options[] = { 1053 { "extended", &aic79xx_extended }, 1054 { "no_reset", &aic79xx_no_reset }, 1055 { "verbose", &aic79xx_verbose }, 1056 { "allow_memio", &aic79xx_allow_memio}, 1057 #ifdef AHD_DEBUG 1058 { "debug", &ahd_debug }, 1059 #endif 1060 { "reverse_scan", &aic79xx_reverse_scan }, 1061 { "periodic_otag", &aic79xx_periodic_otag }, 1062 { "pci_parity", &aic79xx_pci_parity }, 1063 { "seltime", &aic79xx_seltime }, 1064 { "tag_info", NULL }, 1065 { "global_tag_depth", NULL}, 1066 { "slewrate", NULL }, 1067 { "precomp", NULL }, 1068 { "amplitude", NULL }, 1069 { "slowcrc", &aic79xx_slowcrc }, 1070 }; 1071 1072 end = strchr(s, '\0'); 1073 1074 /* 1075 * XXX ia64 gcc isn't smart enough to know that NUM_ELEMENTS 1076 * will never be 0 in this case. 1077 */ 1078 n = 0; 1079 1080 while ((p = strsep(&s, ",.")) != NULL) { 1081 if (*p == '\0') 1082 continue; 1083 for (i = 0; i < NUM_ELEMENTS(options); i++) { 1084 1085 n = strlen(options[i].name); 1086 if (strncmp(options[i].name, p, n) == 0) 1087 break; 1088 } 1089 if (i == NUM_ELEMENTS(options)) 1090 continue; 1091 1092 if (strncmp(p, "global_tag_depth", n) == 0) { 1093 ahd_linux_setup_tag_info_global(p + n); 1094 } else if (strncmp(p, "tag_info", n) == 0) { 1095 s = ahd_parse_brace_option("tag_info", p + n, end, 1096 2, ahd_linux_setup_tag_info, 0); 1097 } else if (strncmp(p, "slewrate", n) == 0) { 1098 s = ahd_parse_brace_option("slewrate", 1099 p + n, end, 1, ahd_linux_setup_iocell_info, 1100 AIC79XX_SLEWRATE_INDEX); 1101 } else if (strncmp(p, "precomp", n) == 0) { 1102 s = ahd_parse_brace_option("precomp", 1103 p + n, end, 1, ahd_linux_setup_iocell_info, 1104 AIC79XX_PRECOMP_INDEX); 1105 } else if (strncmp(p, "amplitude", n) == 0) { 1106 s = ahd_parse_brace_option("amplitude", 1107 p + n, end, 1, ahd_linux_setup_iocell_info, 1108 AIC79XX_AMPLITUDE_INDEX); 1109 } else if (p[n] == ':') { 1110 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1111 } else if (!strncmp(p, "verbose", n)) { 1112 *(options[i].flag) = 1; 1113 } else { 1114 *(options[i].flag) ^= 0xFFFFFFFF; 1115 } 1116 } 1117 return 1; 1118 } 1119 1120 __setup("aic79xx=", aic79xx_setup); 1121 1122 uint32_t aic79xx_verbose; 1123 1124 int 1125 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1126 { 1127 char buf[80]; 1128 struct Scsi_Host *host; 1129 char *new_name; 1130 u_long s; 1131 int retval; 1132 1133 template->name = ahd->description; 1134 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1135 if (host == NULL) 1136 return (ENOMEM); 1137 1138 *((struct ahd_softc **)host->hostdata) = ahd; 1139 ahd->platform_data->host = host; 1140 host->can_queue = AHD_MAX_QUEUE; 1141 host->cmd_per_lun = 2; 1142 host->sg_tablesize = AHD_NSEG; 1143 host->this_id = ahd->our_id; 1144 host->irq = ahd->platform_data->irq; 1145 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1146 host->max_lun = AHD_NUM_LUNS; 1147 host->max_channel = 0; 1148 host->sg_tablesize = AHD_NSEG; 1149 ahd_lock(ahd, &s); 1150 ahd_set_unit(ahd, ahd_linux_unit++); 1151 ahd_unlock(ahd, &s); 1152 sprintf(buf, "scsi%d", host->host_no); 1153 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 1154 if (new_name != NULL) { 1155 strcpy(new_name, buf); 1156 ahd_set_name(ahd, new_name); 1157 } 1158 host->unique_id = ahd->unit; 1159 ahd_linux_initialize_scsi_bus(ahd); 1160 ahd_intr_enable(ahd, TRUE); 1161 1162 host->transportt = ahd_linux_transport_template; 1163 1164 retval = scsi_add_host(host, &ahd->dev_softc->dev); 1165 if (retval) { 1166 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); 1167 scsi_host_put(host); 1168 return retval; 1169 } 1170 1171 scsi_scan_host(host); 1172 return 0; 1173 } 1174 1175 uint64_t 1176 ahd_linux_get_memsize(void) 1177 { 1178 struct sysinfo si; 1179 1180 si_meminfo(&si); 1181 return ((uint64_t)si.totalram << PAGE_SHIFT); 1182 } 1183 1184 /* 1185 * Place the SCSI bus into a known state by either resetting it, 1186 * or forcing transfer negotiations on the next command to any 1187 * target. 1188 */ 1189 static void 1190 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1191 { 1192 u_int target_id; 1193 u_int numtarg; 1194 unsigned long s; 1195 1196 target_id = 0; 1197 numtarg = 0; 1198 1199 if (aic79xx_no_reset != 0) 1200 ahd->flags &= ~AHD_RESET_BUS_A; 1201 1202 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1203 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1204 else 1205 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1206 1207 ahd_lock(ahd, &s); 1208 1209 /* 1210 * Force negotiation to async for all targets that 1211 * will not see an initial bus reset. 1212 */ 1213 for (; target_id < numtarg; target_id++) { 1214 struct ahd_devinfo devinfo; 1215 struct ahd_initiator_tinfo *tinfo; 1216 struct ahd_tmode_tstate *tstate; 1217 1218 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1219 target_id, &tstate); 1220 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1221 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1222 ahd_update_neg_request(ahd, &devinfo, tstate, 1223 tinfo, AHD_NEG_ALWAYS); 1224 } 1225 ahd_unlock(ahd, &s); 1226 /* Give the bus some time to recover */ 1227 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1228 ahd_freeze_simq(ahd); 1229 msleep(AIC79XX_RESET_DELAY); 1230 ahd_release_simq(ahd); 1231 } 1232 } 1233 1234 int 1235 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1236 { 1237 ahd->platform_data = 1238 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT); 1239 if (ahd->platform_data == NULL) 1240 return (ENOMEM); 1241 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data)); 1242 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1243 ahd_lockinit(ahd); 1244 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1245 return (0); 1246 } 1247 1248 void 1249 ahd_platform_free(struct ahd_softc *ahd) 1250 { 1251 struct scsi_target *starget; 1252 int i, j; 1253 1254 if (ahd->platform_data != NULL) { 1255 /* destroy all of the device and target objects */ 1256 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1257 starget = ahd->platform_data->starget[i]; 1258 if (starget != NULL) { 1259 for (j = 0; j < AHD_NUM_LUNS; j++) { 1260 struct ahd_linux_target *targ = 1261 scsi_transport_target_data(starget); 1262 if (targ->sdev[j] == NULL) 1263 continue; 1264 targ->sdev[j] = NULL; 1265 } 1266 ahd->platform_data->starget[i] = NULL; 1267 } 1268 } 1269 1270 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1271 free_irq(ahd->platform_data->irq, ahd); 1272 if (ahd->tags[0] == BUS_SPACE_PIO 1273 && ahd->bshs[0].ioport != 0) 1274 release_region(ahd->bshs[0].ioport, 256); 1275 if (ahd->tags[1] == BUS_SPACE_PIO 1276 && ahd->bshs[1].ioport != 0) 1277 release_region(ahd->bshs[1].ioport, 256); 1278 if (ahd->tags[0] == BUS_SPACE_MEMIO 1279 && ahd->bshs[0].maddr != NULL) { 1280 iounmap(ahd->bshs[0].maddr); 1281 release_mem_region(ahd->platform_data->mem_busaddr, 1282 0x1000); 1283 } 1284 if (ahd->platform_data->host) 1285 scsi_host_put(ahd->platform_data->host); 1286 1287 free(ahd->platform_data, M_DEVBUF); 1288 } 1289 } 1290 1291 void 1292 ahd_platform_init(struct ahd_softc *ahd) 1293 { 1294 /* 1295 * Lookup and commit any modified IO Cell options. 1296 */ 1297 if (ahd->unit < NUM_ELEMENTS(aic79xx_iocell_info)) { 1298 struct ahd_linux_iocell_opts *iocell_opts; 1299 1300 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1301 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1302 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1303 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1304 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1305 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1306 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1307 } 1308 1309 } 1310 1311 void 1312 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1313 { 1314 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1315 SCB_GET_CHANNEL(ahd, scb), 1316 SCB_GET_LUN(scb), SCB_LIST_NULL, 1317 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1318 } 1319 1320 void 1321 ahd_platform_set_tags(struct ahd_softc *ahd, struct ahd_devinfo *devinfo, 1322 ahd_queue_alg alg) 1323 { 1324 struct scsi_target *starget; 1325 struct ahd_linux_target *targ; 1326 struct ahd_linux_device *dev; 1327 struct scsi_device *sdev; 1328 int was_queuing; 1329 int now_queuing; 1330 1331 starget = ahd->platform_data->starget[devinfo->target]; 1332 targ = scsi_transport_target_data(starget); 1333 BUG_ON(targ == NULL); 1334 sdev = targ->sdev[devinfo->lun]; 1335 if (sdev == NULL) 1336 return; 1337 1338 dev = scsi_transport_device_data(sdev); 1339 1340 if (dev == NULL) 1341 return; 1342 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1343 switch (alg) { 1344 default: 1345 case AHD_QUEUE_NONE: 1346 now_queuing = 0; 1347 break; 1348 case AHD_QUEUE_BASIC: 1349 now_queuing = AHD_DEV_Q_BASIC; 1350 break; 1351 case AHD_QUEUE_TAGGED: 1352 now_queuing = AHD_DEV_Q_TAGGED; 1353 break; 1354 } 1355 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1356 && (was_queuing != now_queuing) 1357 && (dev->active != 0)) { 1358 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1359 dev->qfrozen++; 1360 } 1361 1362 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1363 if (now_queuing) { 1364 u_int usertags; 1365 1366 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1367 if (!was_queuing) { 1368 /* 1369 * Start out agressively and allow our 1370 * dynamic queue depth algorithm to take 1371 * care of the rest. 1372 */ 1373 dev->maxtags = usertags; 1374 dev->openings = dev->maxtags - dev->active; 1375 } 1376 if (dev->maxtags == 0) { 1377 /* 1378 * Queueing is disabled by the user. 1379 */ 1380 dev->openings = 1; 1381 } else if (alg == AHD_QUEUE_TAGGED) { 1382 dev->flags |= AHD_DEV_Q_TAGGED; 1383 if (aic79xx_periodic_otag != 0) 1384 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1385 } else 1386 dev->flags |= AHD_DEV_Q_BASIC; 1387 } else { 1388 /* We can only have one opening. */ 1389 dev->maxtags = 0; 1390 dev->openings = 1 - dev->active; 1391 } 1392 1393 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1394 case AHD_DEV_Q_BASIC: 1395 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK); 1396 scsi_activate_tcq(sdev, dev->openings + dev->active); 1397 break; 1398 case AHD_DEV_Q_TAGGED: 1399 scsi_set_tag_type(sdev, MSG_ORDERED_TASK); 1400 scsi_activate_tcq(sdev, dev->openings + dev->active); 1401 break; 1402 default: 1403 /* 1404 * We allow the OS to queue 2 untagged transactions to 1405 * us at any time even though we can only execute them 1406 * serially on the controller/device. This should 1407 * remove some latency. 1408 */ 1409 scsi_deactivate_tcq(sdev, 1); 1410 break; 1411 } 1412 } 1413 1414 int 1415 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1416 int lun, u_int tag, role_t role, uint32_t status) 1417 { 1418 return 0; 1419 } 1420 1421 static u_int 1422 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1423 { 1424 static int warned_user; 1425 u_int tags; 1426 1427 tags = 0; 1428 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1429 if (ahd->unit >= NUM_ELEMENTS(aic79xx_tag_info)) { 1430 1431 if (warned_user == 0) { 1432 printf(KERN_WARNING 1433 "aic79xx: WARNING: Insufficient tag_info instances\n" 1434 "aic79xx: for installed controllers. Using defaults\n" 1435 "aic79xx: Please update the aic79xx_tag_info array in\n" 1436 "aic79xx: the aic79xx_osm.c source file.\n"); 1437 warned_user++; 1438 } 1439 tags = AHD_MAX_QUEUE; 1440 } else { 1441 adapter_tag_info_t *tag_info; 1442 1443 tag_info = &aic79xx_tag_info[ahd->unit]; 1444 tags = tag_info->tag_commands[devinfo->target_offset]; 1445 if (tags > AHD_MAX_QUEUE) 1446 tags = AHD_MAX_QUEUE; 1447 } 1448 } 1449 return (tags); 1450 } 1451 1452 /* 1453 * Determines the queue depth for a given device. 1454 */ 1455 static void 1456 ahd_linux_device_queue_depth(struct scsi_device *sdev) 1457 { 1458 struct ahd_devinfo devinfo; 1459 u_int tags; 1460 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1461 1462 ahd_compile_devinfo(&devinfo, 1463 ahd->our_id, 1464 sdev->sdev_target->id, sdev->lun, 1465 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1466 ROLE_INITIATOR); 1467 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1468 if (tags != 0 && sdev->tagged_supported != 0) { 1469 1470 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_TAGGED); 1471 ahd_print_devinfo(ahd, &devinfo); 1472 printf("Tagged Queuing enabled. Depth %d\n", tags); 1473 } else { 1474 ahd_set_tags(ahd, &devinfo, AHD_QUEUE_NONE); 1475 } 1476 } 1477 1478 static int 1479 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1480 struct scsi_cmnd *cmd) 1481 { 1482 struct scb *scb; 1483 struct hardware_scb *hscb; 1484 struct ahd_initiator_tinfo *tinfo; 1485 struct ahd_tmode_tstate *tstate; 1486 u_int col_idx; 1487 uint16_t mask; 1488 unsigned long flags; 1489 1490 ahd_lock(ahd, &flags); 1491 1492 /* 1493 * Get an scb to use. 1494 */ 1495 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1496 cmd->device->id, &tstate); 1497 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1498 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1499 col_idx = AHD_NEVER_COL_IDX; 1500 } else { 1501 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1502 cmd->device->lun); 1503 } 1504 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1505 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1506 ahd_unlock(ahd, &flags); 1507 return SCSI_MLQUEUE_HOST_BUSY; 1508 } 1509 1510 scb->io_ctx = cmd; 1511 scb->platform_data->dev = dev; 1512 hscb = scb->hscb; 1513 cmd->host_scribble = (char *)scb; 1514 1515 /* 1516 * Fill out basics of the HSCB. 1517 */ 1518 hscb->control = 0; 1519 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1520 hscb->lun = cmd->device->lun; 1521 scb->hscb->task_management = 0; 1522 mask = SCB_GET_TARGET_MASK(ahd, scb); 1523 1524 if ((ahd->user_discenable & mask) != 0) 1525 hscb->control |= DISCENB; 1526 1527 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1528 scb->flags |= SCB_PACKETIZED; 1529 1530 if ((tstate->auto_negotiate & mask) != 0) { 1531 scb->flags |= SCB_AUTO_NEGOTIATE; 1532 scb->hscb->control |= MK_MESSAGE; 1533 } 1534 1535 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1536 int msg_bytes; 1537 uint8_t tag_msgs[2]; 1538 1539 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1540 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1541 hscb->control |= tag_msgs[0]; 1542 if (tag_msgs[0] == MSG_ORDERED_TASK) 1543 dev->commands_since_idle_or_otag = 0; 1544 } else 1545 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1546 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1547 hscb->control |= MSG_ORDERED_TASK; 1548 dev->commands_since_idle_or_otag = 0; 1549 } else { 1550 hscb->control |= MSG_SIMPLE_TASK; 1551 } 1552 } 1553 1554 hscb->cdb_len = cmd->cmd_len; 1555 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1556 1557 scb->platform_data->xfer_len = 0; 1558 ahd_set_residual(scb, 0); 1559 ahd_set_sense_residual(scb, 0); 1560 scb->sg_count = 0; 1561 if (cmd->use_sg != 0) { 1562 void *sg; 1563 struct scatterlist *cur_seg; 1564 u_int nseg; 1565 int dir; 1566 1567 cur_seg = (struct scatterlist *)cmd->request_buffer; 1568 dir = cmd->sc_data_direction; 1569 nseg = pci_map_sg(ahd->dev_softc, cur_seg, 1570 cmd->use_sg, dir); 1571 scb->platform_data->xfer_len = 0; 1572 for (sg = scb->sg_list; nseg > 0; nseg--, cur_seg++) { 1573 dma_addr_t addr; 1574 bus_size_t len; 1575 1576 addr = sg_dma_address(cur_seg); 1577 len = sg_dma_len(cur_seg); 1578 scb->platform_data->xfer_len += len; 1579 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1580 /*last*/nseg == 1); 1581 } 1582 } else if (cmd->request_bufflen != 0) { 1583 void *sg; 1584 dma_addr_t addr; 1585 int dir; 1586 1587 sg = scb->sg_list; 1588 dir = cmd->sc_data_direction; 1589 addr = pci_map_single(ahd->dev_softc, 1590 cmd->request_buffer, 1591 cmd->request_bufflen, dir); 1592 scb->platform_data->xfer_len = cmd->request_bufflen; 1593 scb->platform_data->buf_busaddr = addr; 1594 sg = ahd_sg_setup(ahd, scb, sg, addr, 1595 cmd->request_bufflen, /*last*/TRUE); 1596 } 1597 1598 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1599 dev->openings--; 1600 dev->active++; 1601 dev->commands_issued++; 1602 1603 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1604 dev->commands_since_idle_or_otag++; 1605 scb->flags |= SCB_ACTIVE; 1606 ahd_queue_scb(ahd, scb); 1607 1608 ahd_unlock(ahd, &flags); 1609 1610 return 0; 1611 } 1612 1613 /* 1614 * SCSI controller interrupt handler. 1615 */ 1616 irqreturn_t 1617 ahd_linux_isr(int irq, void *dev_id, struct pt_regs * regs) 1618 { 1619 struct ahd_softc *ahd; 1620 u_long flags; 1621 int ours; 1622 1623 ahd = (struct ahd_softc *) dev_id; 1624 ahd_lock(ahd, &flags); 1625 ours = ahd_intr(ahd); 1626 ahd_unlock(ahd, &flags); 1627 return IRQ_RETVAL(ours); 1628 } 1629 1630 void 1631 ahd_send_async(struct ahd_softc *ahd, char channel, 1632 u_int target, u_int lun, ac_code code, void *arg) 1633 { 1634 switch (code) { 1635 case AC_TRANSFER_NEG: 1636 { 1637 char buf[80]; 1638 struct scsi_target *starget; 1639 struct info_str info; 1640 struct ahd_initiator_tinfo *tinfo; 1641 struct ahd_tmode_tstate *tstate; 1642 unsigned int target_ppr_options; 1643 1644 BUG_ON(target == CAM_TARGET_WILDCARD); 1645 1646 info.buffer = buf; 1647 info.length = sizeof(buf); 1648 info.offset = 0; 1649 info.pos = 0; 1650 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1651 target, &tstate); 1652 1653 /* 1654 * Don't bother reporting results while 1655 * negotiations are still pending. 1656 */ 1657 if (tinfo->curr.period != tinfo->goal.period 1658 || tinfo->curr.width != tinfo->goal.width 1659 || tinfo->curr.offset != tinfo->goal.offset 1660 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1661 if (bootverbose == 0) 1662 break; 1663 1664 /* 1665 * Don't bother reporting results that 1666 * are identical to those last reported. 1667 */ 1668 starget = ahd->platform_data->starget[target]; 1669 if (starget == NULL) 1670 break; 1671 1672 target_ppr_options = 1673 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1674 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1675 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1676 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1677 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1678 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1679 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1680 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1681 1682 if (tinfo->curr.period == spi_period(starget) 1683 && tinfo->curr.width == spi_width(starget) 1684 && tinfo->curr.offset == spi_offset(starget) 1685 && tinfo->curr.ppr_options == target_ppr_options) 1686 if (bootverbose == 0) 1687 break; 1688 1689 spi_period(starget) = tinfo->curr.period; 1690 spi_width(starget) = tinfo->curr.width; 1691 spi_offset(starget) = tinfo->curr.offset; 1692 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1693 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1694 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1695 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1696 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1697 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1698 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1699 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1700 spi_display_xfer_agreement(starget); 1701 break; 1702 } 1703 case AC_SENT_BDR: 1704 { 1705 WARN_ON(lun != CAM_LUN_WILDCARD); 1706 scsi_report_device_reset(ahd->platform_data->host, 1707 channel - 'A', target); 1708 break; 1709 } 1710 case AC_BUS_RESET: 1711 if (ahd->platform_data->host != NULL) { 1712 scsi_report_bus_reset(ahd->platform_data->host, 1713 channel - 'A'); 1714 } 1715 break; 1716 default: 1717 panic("ahd_send_async: Unexpected async event"); 1718 } 1719 } 1720 1721 /* 1722 * Calls the higher level scsi done function and frees the scb. 1723 */ 1724 void 1725 ahd_done(struct ahd_softc *ahd, struct scb *scb) 1726 { 1727 struct scsi_cmnd *cmd; 1728 struct ahd_linux_device *dev; 1729 1730 if ((scb->flags & SCB_ACTIVE) == 0) { 1731 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1732 ahd_dump_card_state(ahd); 1733 panic("Stopping for safety"); 1734 } 1735 LIST_REMOVE(scb, pending_links); 1736 cmd = scb->io_ctx; 1737 dev = scb->platform_data->dev; 1738 dev->active--; 1739 dev->openings++; 1740 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1741 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1742 dev->qfrozen--; 1743 } 1744 ahd_linux_unmap_scb(ahd, scb); 1745 1746 /* 1747 * Guard against stale sense data. 1748 * The Linux mid-layer assumes that sense 1749 * was retrieved anytime the first byte of 1750 * the sense buffer looks "sane". 1751 */ 1752 cmd->sense_buffer[0] = 0; 1753 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1754 uint32_t amount_xferred; 1755 1756 amount_xferred = 1757 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1758 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1759 #ifdef AHD_DEBUG 1760 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1761 ahd_print_path(ahd, scb); 1762 printf("Set CAM_UNCOR_PARITY\n"); 1763 } 1764 #endif 1765 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1766 #ifdef AHD_REPORT_UNDERFLOWS 1767 /* 1768 * This code is disabled by default as some 1769 * clients of the SCSI system do not properly 1770 * initialize the underflow parameter. This 1771 * results in spurious termination of commands 1772 * that complete as expected (e.g. underflow is 1773 * allowed as command can return variable amounts 1774 * of data. 1775 */ 1776 } else if (amount_xferred < scb->io_ctx->underflow) { 1777 u_int i; 1778 1779 ahd_print_path(ahd, scb); 1780 printf("CDB:"); 1781 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1782 printf(" 0x%x", scb->io_ctx->cmnd[i]); 1783 printf("\n"); 1784 ahd_print_path(ahd, scb); 1785 printf("Saw underflow (%ld of %ld bytes). " 1786 "Treated as error\n", 1787 ahd_get_residual(scb), 1788 ahd_get_transfer_length(scb)); 1789 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1790 #endif 1791 } else { 1792 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1793 } 1794 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1795 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1796 } 1797 1798 if (dev->openings == 1 1799 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1800 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1801 dev->tag_success_count++; 1802 /* 1803 * Some devices deal with temporary internal resource 1804 * shortages by returning queue full. When the queue 1805 * full occurrs, we throttle back. Slowly try to get 1806 * back to our previous queue depth. 1807 */ 1808 if ((dev->openings + dev->active) < dev->maxtags 1809 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1810 dev->tag_success_count = 0; 1811 dev->openings++; 1812 } 1813 1814 if (dev->active == 0) 1815 dev->commands_since_idle_or_otag = 0; 1816 1817 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1818 printf("Recovery SCB completes\n"); 1819 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1820 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1821 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1822 1823 if (ahd->platform_data->eh_done) 1824 complete(ahd->platform_data->eh_done); 1825 } 1826 1827 ahd_free_scb(ahd, scb); 1828 ahd_linux_queue_cmd_complete(ahd, cmd); 1829 } 1830 1831 static void 1832 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1833 struct scsi_device *sdev, struct scb *scb) 1834 { 1835 struct ahd_devinfo devinfo; 1836 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1837 1838 ahd_compile_devinfo(&devinfo, 1839 ahd->our_id, 1840 sdev->sdev_target->id, sdev->lun, 1841 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1842 ROLE_INITIATOR); 1843 1844 /* 1845 * We don't currently trust the mid-layer to 1846 * properly deal with queue full or busy. So, 1847 * when one occurs, we tell the mid-layer to 1848 * unconditionally requeue the command to us 1849 * so that we can retry it ourselves. We also 1850 * implement our own throttling mechanism so 1851 * we don't clobber the device with too many 1852 * commands. 1853 */ 1854 switch (ahd_get_scsi_status(scb)) { 1855 default: 1856 break; 1857 case SCSI_STATUS_CHECK_COND: 1858 case SCSI_STATUS_CMD_TERMINATED: 1859 { 1860 struct scsi_cmnd *cmd; 1861 1862 /* 1863 * Copy sense information to the OS's cmd 1864 * structure if it is available. 1865 */ 1866 cmd = scb->io_ctx; 1867 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1868 struct scsi_status_iu_header *siu; 1869 u_int sense_size; 1870 u_int sense_offset; 1871 1872 if (scb->flags & SCB_SENSE) { 1873 sense_size = MIN(sizeof(struct scsi_sense_data) 1874 - ahd_get_sense_residual(scb), 1875 sizeof(cmd->sense_buffer)); 1876 sense_offset = 0; 1877 } else { 1878 /* 1879 * Copy only the sense data into the provided 1880 * buffer. 1881 */ 1882 siu = (struct scsi_status_iu_header *) 1883 scb->sense_data; 1884 sense_size = MIN(scsi_4btoul(siu->sense_length), 1885 sizeof(cmd->sense_buffer)); 1886 sense_offset = SIU_SENSE_OFFSET(siu); 1887 } 1888 1889 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer)); 1890 memcpy(cmd->sense_buffer, 1891 ahd_get_sense_buf(ahd, scb) 1892 + sense_offset, sense_size); 1893 cmd->result |= (DRIVER_SENSE << 24); 1894 1895 #ifdef AHD_DEBUG 1896 if (ahd_debug & AHD_SHOW_SENSE) { 1897 int i; 1898 1899 printf("Copied %d bytes of sense data at %d:", 1900 sense_size, sense_offset); 1901 for (i = 0; i < sense_size; i++) { 1902 if ((i & 0xF) == 0) 1903 printf("\n"); 1904 printf("0x%x ", cmd->sense_buffer[i]); 1905 } 1906 printf("\n"); 1907 } 1908 #endif 1909 } 1910 break; 1911 } 1912 case SCSI_STATUS_QUEUE_FULL: 1913 /* 1914 * By the time the core driver has returned this 1915 * command, all other commands that were queued 1916 * to us but not the device have been returned. 1917 * This ensures that dev->active is equal to 1918 * the number of commands actually queued to 1919 * the device. 1920 */ 1921 dev->tag_success_count = 0; 1922 if (dev->active != 0) { 1923 /* 1924 * Drop our opening count to the number 1925 * of commands currently outstanding. 1926 */ 1927 dev->openings = 0; 1928 #ifdef AHD_DEBUG 1929 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1930 ahd_print_path(ahd, scb); 1931 printf("Dropping tag count to %d\n", 1932 dev->active); 1933 } 1934 #endif 1935 if (dev->active == dev->tags_on_last_queuefull) { 1936 1937 dev->last_queuefull_same_count++; 1938 /* 1939 * If we repeatedly see a queue full 1940 * at the same queue depth, this 1941 * device has a fixed number of tag 1942 * slots. Lock in this tag depth 1943 * so we stop seeing queue fulls from 1944 * this device. 1945 */ 1946 if (dev->last_queuefull_same_count 1947 == AHD_LOCK_TAGS_COUNT) { 1948 dev->maxtags = dev->active; 1949 ahd_print_path(ahd, scb); 1950 printf("Locking max tag count at %d\n", 1951 dev->active); 1952 } 1953 } else { 1954 dev->tags_on_last_queuefull = dev->active; 1955 dev->last_queuefull_same_count = 0; 1956 } 1957 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 1958 ahd_set_scsi_status(scb, SCSI_STATUS_OK); 1959 ahd_platform_set_tags(ahd, &devinfo, 1960 (dev->flags & AHD_DEV_Q_BASIC) 1961 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 1962 break; 1963 } 1964 /* 1965 * Drop down to a single opening, and treat this 1966 * as if the target returned BUSY SCSI status. 1967 */ 1968 dev->openings = 1; 1969 ahd_platform_set_tags(ahd, &devinfo, 1970 (dev->flags & AHD_DEV_Q_BASIC) 1971 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 1972 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); 1973 } 1974 } 1975 1976 static void 1977 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 1978 { 1979 int status; 1980 int new_status = DID_OK; 1981 int do_fallback = 0; 1982 int scsi_status; 1983 1984 /* 1985 * Map CAM error codes into Linux Error codes. We 1986 * avoid the conversion so that the DV code has the 1987 * full error information available when making 1988 * state change decisions. 1989 */ 1990 1991 status = ahd_cmd_get_transaction_status(cmd); 1992 switch (status) { 1993 case CAM_REQ_INPROG: 1994 case CAM_REQ_CMP: 1995 new_status = DID_OK; 1996 break; 1997 case CAM_AUTOSENSE_FAIL: 1998 new_status = DID_ERROR; 1999 /* Fallthrough */ 2000 case CAM_SCSI_STATUS_ERROR: 2001 scsi_status = ahd_cmd_get_scsi_status(cmd); 2002 2003 switch(scsi_status) { 2004 case SCSI_STATUS_CMD_TERMINATED: 2005 case SCSI_STATUS_CHECK_COND: 2006 if ((cmd->result >> 24) != DRIVER_SENSE) { 2007 do_fallback = 1; 2008 } else { 2009 struct scsi_sense_data *sense; 2010 2011 sense = (struct scsi_sense_data *) 2012 &cmd->sense_buffer; 2013 if (sense->extra_len >= 5 && 2014 (sense->add_sense_code == 0x47 2015 || sense->add_sense_code == 0x48)) 2016 do_fallback = 1; 2017 } 2018 break; 2019 default: 2020 break; 2021 } 2022 break; 2023 case CAM_REQ_ABORTED: 2024 new_status = DID_ABORT; 2025 break; 2026 case CAM_BUSY: 2027 new_status = DID_BUS_BUSY; 2028 break; 2029 case CAM_REQ_INVALID: 2030 case CAM_PATH_INVALID: 2031 new_status = DID_BAD_TARGET; 2032 break; 2033 case CAM_SEL_TIMEOUT: 2034 new_status = DID_NO_CONNECT; 2035 break; 2036 case CAM_SCSI_BUS_RESET: 2037 case CAM_BDR_SENT: 2038 new_status = DID_RESET; 2039 break; 2040 case CAM_UNCOR_PARITY: 2041 new_status = DID_PARITY; 2042 do_fallback = 1; 2043 break; 2044 case CAM_CMD_TIMEOUT: 2045 new_status = DID_TIME_OUT; 2046 do_fallback = 1; 2047 break; 2048 case CAM_REQ_CMP_ERR: 2049 case CAM_UNEXP_BUSFREE: 2050 case CAM_DATA_RUN_ERR: 2051 new_status = DID_ERROR; 2052 do_fallback = 1; 2053 break; 2054 case CAM_UA_ABORT: 2055 case CAM_NO_HBA: 2056 case CAM_SEQUENCE_FAIL: 2057 case CAM_CCB_LEN_ERR: 2058 case CAM_PROVIDE_FAIL: 2059 case CAM_REQ_TERMIO: 2060 case CAM_UNREC_HBA_ERROR: 2061 case CAM_REQ_TOO_BIG: 2062 new_status = DID_ERROR; 2063 break; 2064 case CAM_REQUEUE_REQ: 2065 new_status = DID_REQUEUE; 2066 break; 2067 default: 2068 /* We should never get here */ 2069 new_status = DID_ERROR; 2070 break; 2071 } 2072 2073 if (do_fallback) { 2074 printf("%s: device overrun (status %x) on %d:%d:%d\n", 2075 ahd_name(ahd), status, cmd->device->channel, 2076 cmd->device->id, cmd->device->lun); 2077 } 2078 2079 ahd_cmd_set_transaction_status(cmd, new_status); 2080 2081 cmd->scsi_done(cmd); 2082 } 2083 2084 void 2085 ahd_freeze_simq(struct ahd_softc *ahd) 2086 { 2087 scsi_block_requests(ahd->platform_data->host); 2088 } 2089 2090 void 2091 ahd_release_simq(struct ahd_softc *ahd) 2092 { 2093 scsi_unblock_requests(ahd->platform_data->host); 2094 } 2095 2096 static int 2097 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2098 { 2099 struct ahd_softc *ahd; 2100 struct ahd_linux_device *dev; 2101 struct scb *pending_scb; 2102 u_int saved_scbptr; 2103 u_int active_scbptr; 2104 u_int last_phase; 2105 u_int saved_scsiid; 2106 u_int cdb_byte; 2107 int retval; 2108 int was_paused; 2109 int paused; 2110 int wait; 2111 int disconnected; 2112 ahd_mode_state saved_modes; 2113 unsigned long flags; 2114 2115 pending_scb = NULL; 2116 paused = FALSE; 2117 wait = FALSE; 2118 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2119 2120 scmd_printk(KERN_INFO, cmd, 2121 "Attempting to queue an ABORT message:"); 2122 2123 printf("CDB:"); 2124 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2125 printf(" 0x%x", cmd->cmnd[cdb_byte]); 2126 printf("\n"); 2127 2128 ahd_lock(ahd, &flags); 2129 2130 /* 2131 * First determine if we currently own this command. 2132 * Start by searching the device queue. If not found 2133 * there, check the pending_scb list. If not found 2134 * at all, and the system wanted us to just abort the 2135 * command, return success. 2136 */ 2137 dev = scsi_transport_device_data(cmd->device); 2138 2139 if (dev == NULL) { 2140 /* 2141 * No target device for this command exists, 2142 * so we must not still own the command. 2143 */ 2144 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2145 retval = SUCCESS; 2146 goto no_cmd; 2147 } 2148 2149 /* 2150 * See if we can find a matching cmd in the pending list. 2151 */ 2152 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2153 if (pending_scb->io_ctx == cmd) 2154 break; 2155 } 2156 2157 if (pending_scb == NULL) { 2158 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2159 goto no_cmd; 2160 } 2161 2162 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2163 /* 2164 * We can't queue two recovery actions using the same SCB 2165 */ 2166 retval = FAILED; 2167 goto done; 2168 } 2169 2170 /* 2171 * Ensure that the card doesn't do anything 2172 * behind our back. Also make sure that we 2173 * didn't "just" miss an interrupt that would 2174 * affect this cmd. 2175 */ 2176 was_paused = ahd_is_paused(ahd); 2177 ahd_pause_and_flushwork(ahd); 2178 paused = TRUE; 2179 2180 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2181 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2182 goto no_cmd; 2183 } 2184 2185 printf("%s: At time of recovery, card was %spaused\n", 2186 ahd_name(ahd), was_paused ? "" : "not "); 2187 ahd_dump_card_state(ahd); 2188 2189 disconnected = TRUE; 2190 if (ahd_search_qinfifo(ahd, cmd->device->id, 2191 cmd->device->channel + 'A', 2192 cmd->device->lun, 2193 pending_scb->hscb->tag, 2194 ROLE_INITIATOR, CAM_REQ_ABORTED, 2195 SEARCH_COMPLETE) > 0) { 2196 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2197 ahd_name(ahd), cmd->device->channel, 2198 cmd->device->id, cmd->device->lun); 2199 retval = SUCCESS; 2200 goto done; 2201 } 2202 2203 saved_modes = ahd_save_modes(ahd); 2204 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2205 last_phase = ahd_inb(ahd, LASTPHASE); 2206 saved_scbptr = ahd_get_scbptr(ahd); 2207 active_scbptr = saved_scbptr; 2208 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2209 struct scb *bus_scb; 2210 2211 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2212 if (bus_scb == pending_scb) 2213 disconnected = FALSE; 2214 } 2215 2216 /* 2217 * At this point, pending_scb is the scb associated with the 2218 * passed in command. That command is currently active on the 2219 * bus or is in the disconnected state. 2220 */ 2221 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); 2222 if (last_phase != P_BUSFREE 2223 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2224 2225 /* 2226 * We're active on the bus, so assert ATN 2227 * and hope that the target responds. 2228 */ 2229 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2230 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2231 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2232 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2233 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2234 wait = TRUE; 2235 } else if (disconnected) { 2236 2237 /* 2238 * Actually re-queue this SCB in an attempt 2239 * to select the device before it reconnects. 2240 */ 2241 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2242 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2243 pending_scb->hscb->cdb_len = 0; 2244 pending_scb->hscb->task_attribute = 0; 2245 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2246 2247 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2248 /* 2249 * Mark the SCB has having an outstanding 2250 * task management function. Should the command 2251 * complete normally before the task management 2252 * function can be sent, the host will be notified 2253 * to abort our requeued SCB. 2254 */ 2255 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2256 pending_scb->hscb->task_management); 2257 } else { 2258 /* 2259 * If non-packetized, set the MK_MESSAGE control 2260 * bit indicating that we desire to send a message. 2261 * We also set the disconnected flag since there is 2262 * no guarantee that our SCB control byte matches 2263 * the version on the card. We don't want the 2264 * sequencer to abort the command thinking an 2265 * unsolicited reselection occurred. 2266 */ 2267 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2268 2269 /* 2270 * The sequencer will never re-reference the 2271 * in-core SCB. To make sure we are notified 2272 * during reslection, set the MK_MESSAGE flag in 2273 * the card's copy of the SCB. 2274 */ 2275 ahd_outb(ahd, SCB_CONTROL, 2276 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2277 } 2278 2279 /* 2280 * Clear out any entries in the QINFIFO first 2281 * so we are the next SCB for this target 2282 * to run. 2283 */ 2284 ahd_search_qinfifo(ahd, cmd->device->id, 2285 cmd->device->channel + 'A', cmd->device->lun, 2286 SCB_LIST_NULL, ROLE_INITIATOR, 2287 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2288 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2289 ahd_set_scbptr(ahd, saved_scbptr); 2290 ahd_print_path(ahd, pending_scb); 2291 printf("Device is disconnected, re-queuing SCB\n"); 2292 wait = TRUE; 2293 } else { 2294 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2295 retval = FAILED; 2296 goto done; 2297 } 2298 2299 no_cmd: 2300 /* 2301 * Our assumption is that if we don't have the command, no 2302 * recovery action was required, so we return success. Again, 2303 * the semantics of the mid-layer recovery engine are not 2304 * well defined, so this may change in time. 2305 */ 2306 retval = SUCCESS; 2307 done: 2308 if (paused) 2309 ahd_unpause(ahd); 2310 if (wait) { 2311 DECLARE_COMPLETION(done); 2312 2313 ahd->platform_data->eh_done = &done; 2314 ahd_unlock(ahd, &flags); 2315 2316 printf("%s: Recovery code sleeping\n", ahd_name(ahd)); 2317 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2318 ahd_lock(ahd, &flags); 2319 ahd->platform_data->eh_done = NULL; 2320 ahd_unlock(ahd, &flags); 2321 printf("%s: Timer Expired (active %d)\n", 2322 ahd_name(ahd), dev->active); 2323 retval = FAILED; 2324 } 2325 printf("Recovery code awake\n"); 2326 } else 2327 ahd_unlock(ahd, &flags); 2328 2329 if (retval != SUCCESS) 2330 printf("%s: Command abort returning 0x%x\n", 2331 ahd_name(ahd), retval); 2332 2333 return retval; 2334 } 2335 2336 static void ahd_linux_set_width(struct scsi_target *starget, int width) 2337 { 2338 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2339 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2340 struct ahd_devinfo devinfo; 2341 unsigned long flags; 2342 2343 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2344 starget->channel + 'A', ROLE_INITIATOR); 2345 ahd_lock(ahd, &flags); 2346 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2347 ahd_unlock(ahd, &flags); 2348 } 2349 2350 static void ahd_linux_set_period(struct scsi_target *starget, int period) 2351 { 2352 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2353 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2354 struct ahd_tmode_tstate *tstate; 2355 struct ahd_initiator_tinfo *tinfo 2356 = ahd_fetch_transinfo(ahd, 2357 starget->channel + 'A', 2358 shost->this_id, starget->id, &tstate); 2359 struct ahd_devinfo devinfo; 2360 unsigned int ppr_options = tinfo->goal.ppr_options; 2361 unsigned int dt; 2362 unsigned long flags; 2363 unsigned long offset = tinfo->goal.offset; 2364 2365 #ifdef AHD_DEBUG 2366 if ((ahd_debug & AHD_SHOW_DV) != 0) 2367 printf("%s: set period to %d\n", ahd_name(ahd), period); 2368 #endif 2369 if (offset == 0) 2370 offset = MAX_OFFSET; 2371 2372 if (period < 8) 2373 period = 8; 2374 if (period < 10) { 2375 ppr_options |= MSG_EXT_PPR_DT_REQ; 2376 if (period == 8) 2377 ppr_options |= MSG_EXT_PPR_IU_REQ; 2378 } 2379 2380 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2381 2382 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2383 starget->channel + 'A', ROLE_INITIATOR); 2384 2385 /* all PPR requests apart from QAS require wide transfers */ 2386 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2387 if (spi_width(starget) == 0) 2388 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2389 } 2390 2391 ahd_find_syncrate(ahd, &period, &ppr_options, 2392 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2393 2394 ahd_lock(ahd, &flags); 2395 ahd_set_syncrate(ahd, &devinfo, period, offset, 2396 ppr_options, AHD_TRANS_GOAL, FALSE); 2397 ahd_unlock(ahd, &flags); 2398 } 2399 2400 static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2401 { 2402 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2403 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2404 struct ahd_tmode_tstate *tstate; 2405 struct ahd_initiator_tinfo *tinfo 2406 = ahd_fetch_transinfo(ahd, 2407 starget->channel + 'A', 2408 shost->this_id, starget->id, &tstate); 2409 struct ahd_devinfo devinfo; 2410 unsigned int ppr_options = 0; 2411 unsigned int period = 0; 2412 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2413 unsigned long flags; 2414 2415 #ifdef AHD_DEBUG 2416 if ((ahd_debug & AHD_SHOW_DV) != 0) 2417 printf("%s: set offset to %d\n", ahd_name(ahd), offset); 2418 #endif 2419 2420 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2421 starget->channel + 'A', ROLE_INITIATOR); 2422 if (offset != 0) { 2423 period = tinfo->goal.period; 2424 ppr_options = tinfo->goal.ppr_options; 2425 ahd_find_syncrate(ahd, &period, &ppr_options, 2426 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2427 } 2428 2429 ahd_lock(ahd, &flags); 2430 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2431 AHD_TRANS_GOAL, FALSE); 2432 ahd_unlock(ahd, &flags); 2433 } 2434 2435 static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2436 { 2437 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2438 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2439 struct ahd_tmode_tstate *tstate; 2440 struct ahd_initiator_tinfo *tinfo 2441 = ahd_fetch_transinfo(ahd, 2442 starget->channel + 'A', 2443 shost->this_id, starget->id, &tstate); 2444 struct ahd_devinfo devinfo; 2445 unsigned int ppr_options = tinfo->goal.ppr_options 2446 & ~MSG_EXT_PPR_DT_REQ; 2447 unsigned int period = tinfo->goal.period; 2448 unsigned int width = tinfo->goal.width; 2449 unsigned long flags; 2450 2451 #ifdef AHD_DEBUG 2452 if ((ahd_debug & AHD_SHOW_DV) != 0) 2453 printf("%s: %s DT\n", ahd_name(ahd), 2454 dt ? "enabling" : "disabling"); 2455 #endif 2456 if (dt) { 2457 ppr_options |= MSG_EXT_PPR_DT_REQ; 2458 if (!width) 2459 ahd_linux_set_width(starget, 1); 2460 } else { 2461 if (period <= 9) 2462 period = 10; /* If resetting DT, period must be >= 25ns */ 2463 /* IU is invalid without DT set */ 2464 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2465 } 2466 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2467 starget->channel + 'A', ROLE_INITIATOR); 2468 ahd_find_syncrate(ahd, &period, &ppr_options, 2469 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2470 2471 ahd_lock(ahd, &flags); 2472 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2473 ppr_options, AHD_TRANS_GOAL, FALSE); 2474 ahd_unlock(ahd, &flags); 2475 } 2476 2477 static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2478 { 2479 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2480 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2481 struct ahd_tmode_tstate *tstate; 2482 struct ahd_initiator_tinfo *tinfo 2483 = ahd_fetch_transinfo(ahd, 2484 starget->channel + 'A', 2485 shost->this_id, starget->id, &tstate); 2486 struct ahd_devinfo devinfo; 2487 unsigned int ppr_options = tinfo->goal.ppr_options 2488 & ~MSG_EXT_PPR_QAS_REQ; 2489 unsigned int period = tinfo->goal.period; 2490 unsigned int dt; 2491 unsigned long flags; 2492 2493 #ifdef AHD_DEBUG 2494 if ((ahd_debug & AHD_SHOW_DV) != 0) 2495 printf("%s: %s QAS\n", ahd_name(ahd), 2496 qas ? "enabling" : "disabling"); 2497 #endif 2498 2499 if (qas) { 2500 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2501 } 2502 2503 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2504 2505 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2506 starget->channel + 'A', ROLE_INITIATOR); 2507 ahd_find_syncrate(ahd, &period, &ppr_options, 2508 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2509 2510 ahd_lock(ahd, &flags); 2511 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2512 ppr_options, AHD_TRANS_GOAL, FALSE); 2513 ahd_unlock(ahd, &flags); 2514 } 2515 2516 static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 2517 { 2518 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2519 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2520 struct ahd_tmode_tstate *tstate; 2521 struct ahd_initiator_tinfo *tinfo 2522 = ahd_fetch_transinfo(ahd, 2523 starget->channel + 'A', 2524 shost->this_id, starget->id, &tstate); 2525 struct ahd_devinfo devinfo; 2526 unsigned int ppr_options = tinfo->goal.ppr_options 2527 & ~MSG_EXT_PPR_IU_REQ; 2528 unsigned int period = tinfo->goal.period; 2529 unsigned int dt; 2530 unsigned long flags; 2531 2532 #ifdef AHD_DEBUG 2533 if ((ahd_debug & AHD_SHOW_DV) != 0) 2534 printf("%s: %s IU\n", ahd_name(ahd), 2535 iu ? "enabling" : "disabling"); 2536 #endif 2537 2538 if (iu) { 2539 ppr_options |= MSG_EXT_PPR_IU_REQ; 2540 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2541 } 2542 2543 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2544 2545 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2546 starget->channel + 'A', ROLE_INITIATOR); 2547 ahd_find_syncrate(ahd, &period, &ppr_options, 2548 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2549 2550 ahd_lock(ahd, &flags); 2551 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2552 ppr_options, AHD_TRANS_GOAL, FALSE); 2553 ahd_unlock(ahd, &flags); 2554 } 2555 2556 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2557 { 2558 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2559 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2560 struct ahd_tmode_tstate *tstate; 2561 struct ahd_initiator_tinfo *tinfo 2562 = ahd_fetch_transinfo(ahd, 2563 starget->channel + 'A', 2564 shost->this_id, starget->id, &tstate); 2565 struct ahd_devinfo devinfo; 2566 unsigned int ppr_options = tinfo->goal.ppr_options 2567 & ~MSG_EXT_PPR_RD_STRM; 2568 unsigned int period = tinfo->goal.period; 2569 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2570 unsigned long flags; 2571 2572 #ifdef AHD_DEBUG 2573 if ((ahd_debug & AHD_SHOW_DV) != 0) 2574 printf("%s: %s Read Streaming\n", ahd_name(ahd), 2575 rdstrm ? "enabling" : "disabling"); 2576 #endif 2577 2578 if (rdstrm) 2579 ppr_options |= MSG_EXT_PPR_RD_STRM; 2580 2581 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2582 starget->channel + 'A', ROLE_INITIATOR); 2583 ahd_find_syncrate(ahd, &period, &ppr_options, 2584 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2585 2586 ahd_lock(ahd, &flags); 2587 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2588 ppr_options, AHD_TRANS_GOAL, FALSE); 2589 ahd_unlock(ahd, &flags); 2590 } 2591 2592 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2593 { 2594 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2595 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2596 struct ahd_tmode_tstate *tstate; 2597 struct ahd_initiator_tinfo *tinfo 2598 = ahd_fetch_transinfo(ahd, 2599 starget->channel + 'A', 2600 shost->this_id, starget->id, &tstate); 2601 struct ahd_devinfo devinfo; 2602 unsigned int ppr_options = tinfo->goal.ppr_options 2603 & ~MSG_EXT_PPR_WR_FLOW; 2604 unsigned int period = tinfo->goal.period; 2605 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2606 unsigned long flags; 2607 2608 #ifdef AHD_DEBUG 2609 if ((ahd_debug & AHD_SHOW_DV) != 0) 2610 printf("%s: %s Write Flow Control\n", ahd_name(ahd), 2611 wrflow ? "enabling" : "disabling"); 2612 #endif 2613 2614 if (wrflow) 2615 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2616 2617 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2618 starget->channel + 'A', ROLE_INITIATOR); 2619 ahd_find_syncrate(ahd, &period, &ppr_options, 2620 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2621 2622 ahd_lock(ahd, &flags); 2623 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2624 ppr_options, AHD_TRANS_GOAL, FALSE); 2625 ahd_unlock(ahd, &flags); 2626 } 2627 2628 static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2629 { 2630 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2631 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2632 struct ahd_tmode_tstate *tstate; 2633 struct ahd_initiator_tinfo *tinfo 2634 = ahd_fetch_transinfo(ahd, 2635 starget->channel + 'A', 2636 shost->this_id, starget->id, &tstate); 2637 struct ahd_devinfo devinfo; 2638 unsigned int ppr_options = tinfo->goal.ppr_options 2639 & ~MSG_EXT_PPR_RTI; 2640 unsigned int period = tinfo->goal.period; 2641 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2642 unsigned long flags; 2643 2644 if ((ahd->features & AHD_RTI) == 0) { 2645 #ifdef AHD_DEBUG 2646 if ((ahd_debug & AHD_SHOW_DV) != 0) 2647 printf("%s: RTI not available\n", ahd_name(ahd)); 2648 #endif 2649 return; 2650 } 2651 2652 #ifdef AHD_DEBUG 2653 if ((ahd_debug & AHD_SHOW_DV) != 0) 2654 printf("%s: %s RTI\n", ahd_name(ahd), 2655 rti ? "enabling" : "disabling"); 2656 #endif 2657 2658 if (rti) 2659 ppr_options |= MSG_EXT_PPR_RTI; 2660 2661 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2662 starget->channel + 'A', ROLE_INITIATOR); 2663 ahd_find_syncrate(ahd, &period, &ppr_options, 2664 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2665 2666 ahd_lock(ahd, &flags); 2667 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2668 ppr_options, AHD_TRANS_GOAL, FALSE); 2669 ahd_unlock(ahd, &flags); 2670 } 2671 2672 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2673 { 2674 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2675 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2676 struct ahd_tmode_tstate *tstate; 2677 struct ahd_initiator_tinfo *tinfo 2678 = ahd_fetch_transinfo(ahd, 2679 starget->channel + 'A', 2680 shost->this_id, starget->id, &tstate); 2681 struct ahd_devinfo devinfo; 2682 unsigned int ppr_options = tinfo->goal.ppr_options 2683 & ~MSG_EXT_PPR_PCOMP_EN; 2684 unsigned int period = tinfo->goal.period; 2685 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2686 unsigned long flags; 2687 2688 #ifdef AHD_DEBUG 2689 if ((ahd_debug & AHD_SHOW_DV) != 0) 2690 printf("%s: %s Precompensation\n", ahd_name(ahd), 2691 pcomp ? "Enable" : "Disable"); 2692 #endif 2693 2694 if (pcomp) 2695 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2696 2697 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2698 starget->channel + 'A', ROLE_INITIATOR); 2699 ahd_find_syncrate(ahd, &period, &ppr_options, 2700 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2701 2702 ahd_lock(ahd, &flags); 2703 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2704 ppr_options, AHD_TRANS_GOAL, FALSE); 2705 ahd_unlock(ahd, &flags); 2706 } 2707 2708 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2709 { 2710 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2711 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2712 struct ahd_tmode_tstate *tstate; 2713 struct ahd_initiator_tinfo *tinfo 2714 = ahd_fetch_transinfo(ahd, 2715 starget->channel + 'A', 2716 shost->this_id, starget->id, &tstate); 2717 struct ahd_devinfo devinfo; 2718 unsigned int ppr_options = tinfo->goal.ppr_options 2719 & ~MSG_EXT_PPR_HOLD_MCS; 2720 unsigned int period = tinfo->goal.period; 2721 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2722 unsigned long flags; 2723 2724 if (hold) 2725 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2726 2727 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2728 starget->channel + 'A', ROLE_INITIATOR); 2729 ahd_find_syncrate(ahd, &period, &ppr_options, 2730 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2731 2732 ahd_lock(ahd, &flags); 2733 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2734 ppr_options, AHD_TRANS_GOAL, FALSE); 2735 ahd_unlock(ahd, &flags); 2736 } 2737 2738 2739 2740 static struct spi_function_template ahd_linux_transport_functions = { 2741 .set_offset = ahd_linux_set_offset, 2742 .show_offset = 1, 2743 .set_period = ahd_linux_set_period, 2744 .show_period = 1, 2745 .set_width = ahd_linux_set_width, 2746 .show_width = 1, 2747 .set_dt = ahd_linux_set_dt, 2748 .show_dt = 1, 2749 .set_iu = ahd_linux_set_iu, 2750 .show_iu = 1, 2751 .set_qas = ahd_linux_set_qas, 2752 .show_qas = 1, 2753 .set_rd_strm = ahd_linux_set_rd_strm, 2754 .show_rd_strm = 1, 2755 .set_wr_flow = ahd_linux_set_wr_flow, 2756 .show_wr_flow = 1, 2757 .set_rti = ahd_linux_set_rti, 2758 .show_rti = 1, 2759 .set_pcomp_en = ahd_linux_set_pcomp_en, 2760 .show_pcomp_en = 1, 2761 .set_hold_mcs = ahd_linux_set_hold_mcs, 2762 .show_hold_mcs = 1, 2763 }; 2764 2765 static int __init 2766 ahd_linux_init(void) 2767 { 2768 int error = 0; 2769 2770 /* 2771 * If we've been passed any parameters, process them now. 2772 */ 2773 if (aic79xx) 2774 aic79xx_setup(aic79xx); 2775 2776 ahd_linux_transport_template = 2777 spi_attach_transport(&ahd_linux_transport_functions); 2778 if (!ahd_linux_transport_template) 2779 return -ENODEV; 2780 2781 scsi_transport_reserve_target(ahd_linux_transport_template, 2782 sizeof(struct ahd_linux_target)); 2783 scsi_transport_reserve_device(ahd_linux_transport_template, 2784 sizeof(struct ahd_linux_device)); 2785 2786 error = ahd_linux_pci_init(); 2787 if (error) 2788 spi_release_transport(ahd_linux_transport_template); 2789 return error; 2790 } 2791 2792 static void __exit 2793 ahd_linux_exit(void) 2794 { 2795 ahd_linux_pci_exit(); 2796 spi_release_transport(ahd_linux_transport_template); 2797 } 2798 2799 module_init(ahd_linux_init); 2800 module_exit(ahd_linux_exit); 2801