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 #include <linux/slab.h> 57 58 /* 59 * Bucket size for counting good commands in between bad ones. 60 */ 61 #define AHD_LINUX_ERR_THRESH 1000 62 63 /* 64 * Set this to the delay in seconds after SCSI bus reset. 65 * Note, we honor this only for the initial bus reset. 66 * The scsi error recovery code performs its own bus settle 67 * delay handling for error recovery actions. 68 */ 69 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS 70 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS 71 #else 72 #define AIC79XX_RESET_DELAY 5000 73 #endif 74 75 /* 76 * To change the default number of tagged transactions allowed per-device, 77 * add a line to the lilo.conf file like: 78 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 79 * which will result in the first four devices on the first two 80 * controllers being set to a tagged queue depth of 32. 81 * 82 * The tag_commands is an array of 16 to allow for wide and twin adapters. 83 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 84 * for channel 1. 85 */ 86 typedef struct { 87 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */ 88 } adapter_tag_info_t; 89 90 /* 91 * Modify this as you see fit for your system. 92 * 93 * 0 tagged queuing disabled 94 * 1 <= n <= 253 n == max tags ever dispatched. 95 * 96 * The driver will throttle the number of commands dispatched to a 97 * device if it returns queue full. For devices with a fixed maximum 98 * queue depth, the driver will eventually determine this depth and 99 * lock it in (a console message is printed to indicate that a lock 100 * has occurred). On some devices, queue full is returned for a temporary 101 * resource shortage. These devices will return queue full at varying 102 * depths. The driver will throttle back when the queue fulls occur and 103 * attempt to slowly increase the depth over time as the device recovers 104 * from the resource shortage. 105 * 106 * In this example, the first line will disable tagged queueing for all 107 * the devices on the first probed aic79xx adapter. 108 * 109 * The second line enables tagged queueing with 4 commands/LUN for IDs 110 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 111 * driver to attempt to use up to 64 tags for ID 1. 112 * 113 * The third line is the same as the first line. 114 * 115 * The fourth line disables tagged queueing for devices 0 and 3. It 116 * enables tagged queueing for the other IDs, with 16 commands/LUN 117 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 118 * IDs 2, 5-7, and 9-15. 119 */ 120 121 /* 122 * NOTE: The below structure is for reference only, the actual structure 123 * to modify in order to change things is just below this comment block. 124 adapter_tag_info_t aic79xx_tag_info[] = 125 { 126 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 127 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 128 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 129 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 130 }; 131 */ 132 133 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE 134 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE 135 #else 136 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE 137 #endif 138 139 #define AIC79XX_CONFIGED_TAG_COMMANDS { \ 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 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \ 148 } 149 150 /* 151 * By default, use the number of commands specified by 152 * the users kernel configuration. 153 */ 154 static adapter_tag_info_t aic79xx_tag_info[] = 155 { 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 {AIC79XX_CONFIGED_TAG_COMMANDS} 172 }; 173 174 /* 175 * The I/O cell on the chip is very configurable in respect to its analog 176 * characteristics. Set the defaults here; they can be overriden with 177 * the proper insmod parameters. 178 */ 179 struct ahd_linux_iocell_opts 180 { 181 uint8_t precomp; 182 uint8_t slewrate; 183 uint8_t amplitude; 184 }; 185 #define AIC79XX_DEFAULT_PRECOMP 0xFF 186 #define AIC79XX_DEFAULT_SLEWRATE 0xFF 187 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF 188 #define AIC79XX_DEFAULT_IOOPTS \ 189 { \ 190 AIC79XX_DEFAULT_PRECOMP, \ 191 AIC79XX_DEFAULT_SLEWRATE, \ 192 AIC79XX_DEFAULT_AMPLITUDE \ 193 } 194 #define AIC79XX_PRECOMP_INDEX 0 195 #define AIC79XX_SLEWRATE_INDEX 1 196 #define AIC79XX_AMPLITUDE_INDEX 2 197 static const struct ahd_linux_iocell_opts aic79xx_iocell_info[] = 198 { 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 AIC79XX_DEFAULT_IOOPTS 215 }; 216 217 /* 218 * There should be a specific return value for this in scsi.h, but 219 * it seems that most drivers ignore it. 220 */ 221 #define DID_UNDERFLOW DID_ERROR 222 223 void 224 ahd_print_path(struct ahd_softc *ahd, struct scb *scb) 225 { 226 printk("(scsi%d:%c:%d:%d): ", 227 ahd->platform_data->host->host_no, 228 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X', 229 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1, 230 scb != NULL ? SCB_GET_LUN(scb) : -1); 231 } 232 233 /* 234 * XXX - these options apply unilaterally to _all_ adapters 235 * cards in the system. This should be fixed. Exceptions to this 236 * rule are noted in the comments. 237 */ 238 239 /* 240 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 241 * has no effect on any later resets that might occur due to things like 242 * SCSI bus timeouts. 243 */ 244 static uint32_t aic79xx_no_reset; 245 246 /* 247 * Should we force EXTENDED translation on a controller. 248 * 0 == Use whatever is in the SEEPROM or default to off 249 * 1 == Use whatever is in the SEEPROM or default to on 250 */ 251 static uint32_t aic79xx_extended; 252 253 /* 254 * PCI bus parity checking of the Adaptec controllers. This is somewhat 255 * dubious at best. To my knowledge, this option has never actually 256 * solved a PCI parity problem, but on certain machines with broken PCI 257 * chipset configurations, it can generate tons of false error messages. 258 * It's included in the driver for completeness. 259 * 0 = Shut off PCI parity check 260 * non-0 = Enable PCI parity check 261 * 262 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this 263 * variable to -1 you would actually want to simply pass the variable 264 * name without a number. That will invert the 0 which will result in 265 * -1. 266 */ 267 static uint32_t aic79xx_pci_parity = ~0; 268 269 /* 270 * There are lots of broken chipsets in the world. Some of them will 271 * violate the PCI spec when we issue byte sized memory writes to our 272 * controller. I/O mapped register access, if allowed by the given 273 * platform, will work in almost all cases. 274 */ 275 uint32_t aic79xx_allow_memio = ~0; 276 277 /* 278 * So that we can set how long each device is given as a selection timeout. 279 * The table of values goes like this: 280 * 0 - 256ms 281 * 1 - 128ms 282 * 2 - 64ms 283 * 3 - 32ms 284 * We default to 256ms because some older devices need a longer time 285 * to respond to initial selection. 286 */ 287 static uint32_t aic79xx_seltime; 288 289 /* 290 * Certain devices do not perform any aging on commands. Should the 291 * device be saturated by commands in one portion of the disk, it is 292 * possible for transactions on far away sectors to never be serviced. 293 * To handle these devices, we can periodically send an ordered tag to 294 * force all outstanding transactions to be serviced prior to a new 295 * transaction. 296 */ 297 static uint32_t aic79xx_periodic_otag; 298 299 /* Some storage boxes are using an LSI chip which has a bug making it 300 * impossible to use aic79xx Rev B chip in 320 speeds. The following 301 * storage boxes have been reported to be buggy: 302 * EonStor 3U 16-Bay: U16U-G3A3 303 * EonStor 2U 12-Bay: U12U-G3A3 304 * SentinelRAID: 2500F R5 / R6 305 * SentinelRAID: 2500F R1 306 * SentinelRAID: 2500F/1500F 307 * SentinelRAID: 150F 308 * 309 * To get around this LSI bug, you can set your board to 160 mode 310 * or you can enable the SLOWCRC bit. 311 */ 312 uint32_t aic79xx_slowcrc; 313 314 /* 315 * Module information and settable options. 316 */ 317 static char *aic79xx = NULL; 318 319 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); 320 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver"); 321 MODULE_LICENSE("Dual BSD/GPL"); 322 MODULE_VERSION(AIC79XX_DRIVER_VERSION); 323 module_param(aic79xx, charp, 0444); 324 MODULE_PARM_DESC(aic79xx, 325 "period-delimited options string:\n" 326 " verbose Enable verbose/diagnostic logging\n" 327 " allow_memio Allow device registers to be memory mapped\n" 328 " debug Bitmask of debug values to enable\n" 329 " no_reset Suppress initial bus resets\n" 330 " extended Enable extended geometry on all controllers\n" 331 " periodic_otag Send an ordered tagged transaction\n" 332 " periodically to prevent tag starvation.\n" 333 " This may be required by some older disk\n" 334 " or drives/RAID arrays.\n" 335 " tag_info:<tag_str> Set per-target tag depth\n" 336 " global_tag_depth:<int> Global tag depth for all targets on all buses\n" 337 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" 338 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n" 339 " amplitude:<int> Set the signal amplitude (0-7).\n" 340 " seltime:<int> Selection Timeout:\n" 341 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 342 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n" 343 "\n" 344 " Sample modprobe configuration file:\n" 345 " # Enable verbose logging\n" 346 " # Set tag depth on Controller 2/Target 2 to 10 tags\n" 347 " # Shorten the selection timeout to 128ms\n" 348 "\n" 349 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" 350 ); 351 352 static void ahd_linux_handle_scsi_status(struct ahd_softc *, 353 struct scsi_device *, 354 struct scb *); 355 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, 356 struct scsi_cmnd *cmd); 357 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd); 358 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); 359 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, 360 struct ahd_devinfo *devinfo); 361 static void ahd_linux_device_queue_depth(struct scsi_device *); 362 static int ahd_linux_run_command(struct ahd_softc*, 363 struct ahd_linux_device *, 364 struct scsi_cmnd *); 365 static void ahd_linux_setup_tag_info_global(char *p); 366 static int aic79xx_setup(char *c); 367 static void ahd_freeze_simq(struct ahd_softc *ahd); 368 static void ahd_release_simq(struct ahd_softc *ahd); 369 370 static int ahd_linux_unit; 371 372 373 /************************** OS Utility Wrappers *******************************/ 374 void ahd_delay(long); 375 void 376 ahd_delay(long usec) 377 { 378 /* 379 * udelay on Linux can have problems for 380 * multi-millisecond waits. Wait at most 381 * 1024us per call. 382 */ 383 while (usec > 0) { 384 udelay(usec % 1024); 385 usec -= 1024; 386 } 387 } 388 389 390 /***************************** Low Level I/O **********************************/ 391 uint8_t ahd_inb(struct ahd_softc * ahd, long port); 392 void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val); 393 void ahd_outw_atomic(struct ahd_softc * ahd, 394 long port, uint16_t val); 395 void ahd_outsb(struct ahd_softc * ahd, long port, 396 uint8_t *, int count); 397 void ahd_insb(struct ahd_softc * ahd, long port, 398 uint8_t *, int count); 399 400 uint8_t 401 ahd_inb(struct ahd_softc * ahd, long port) 402 { 403 uint8_t x; 404 405 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 406 x = readb(ahd->bshs[0].maddr + port); 407 } else { 408 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); 409 } 410 mb(); 411 return (x); 412 } 413 414 #if 0 /* unused */ 415 static uint16_t 416 ahd_inw_atomic(struct ahd_softc * ahd, long port) 417 { 418 uint8_t x; 419 420 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 421 x = readw(ahd->bshs[0].maddr + port); 422 } else { 423 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); 424 } 425 mb(); 426 return (x); 427 } 428 #endif 429 430 void 431 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val) 432 { 433 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 434 writeb(val, ahd->bshs[0].maddr + port); 435 } else { 436 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); 437 } 438 mb(); 439 } 440 441 void 442 ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val) 443 { 444 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 445 writew(val, ahd->bshs[0].maddr + port); 446 } else { 447 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); 448 } 449 mb(); 450 } 451 452 void 453 ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count) 454 { 455 int i; 456 457 /* 458 * There is probably a more efficient way to do this on Linux 459 * but we don't use this for anything speed critical and this 460 * should work. 461 */ 462 for (i = 0; i < count; i++) 463 ahd_outb(ahd, port, *array++); 464 } 465 466 void 467 ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count) 468 { 469 int i; 470 471 /* 472 * There is probably a more efficient way to do this on Linux 473 * but we don't use this for anything speed critical and this 474 * should work. 475 */ 476 for (i = 0; i < count; i++) 477 *array++ = ahd_inb(ahd, port); 478 } 479 480 /******************************* PCI Routines *********************************/ 481 uint32_t 482 ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width) 483 { 484 switch (width) { 485 case 1: 486 { 487 uint8_t retval; 488 489 pci_read_config_byte(pci, reg, &retval); 490 return (retval); 491 } 492 case 2: 493 { 494 uint16_t retval; 495 pci_read_config_word(pci, reg, &retval); 496 return (retval); 497 } 498 case 4: 499 { 500 uint32_t retval; 501 pci_read_config_dword(pci, reg, &retval); 502 return (retval); 503 } 504 default: 505 panic("ahd_pci_read_config: Read size too big"); 506 /* NOTREACHED */ 507 return (0); 508 } 509 } 510 511 void 512 ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width) 513 { 514 switch (width) { 515 case 1: 516 pci_write_config_byte(pci, reg, value); 517 break; 518 case 2: 519 pci_write_config_word(pci, reg, value); 520 break; 521 case 4: 522 pci_write_config_dword(pci, reg, value); 523 break; 524 default: 525 panic("ahd_pci_write_config: Write size too big"); 526 /* NOTREACHED */ 527 } 528 } 529 530 /****************************** Inlines ***************************************/ 531 static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); 532 533 static void 534 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) 535 { 536 struct scsi_cmnd *cmd; 537 538 cmd = scb->io_ctx; 539 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); 540 scsi_dma_unmap(cmd); 541 } 542 543 /******************************** Macros **************************************/ 544 #define BUILD_SCSIID(ahd, cmd) \ 545 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id) 546 547 /* 548 * Return a string describing the driver. 549 */ 550 static const char * 551 ahd_linux_info(struct Scsi_Host *host) 552 { 553 static char buffer[512]; 554 char ahd_info[256]; 555 char *bp; 556 struct ahd_softc *ahd; 557 558 bp = &buffer[0]; 559 ahd = *(struct ahd_softc **)host->hostdata; 560 memset(bp, 0, sizeof(buffer)); 561 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n" 562 " <"); 563 strcat(bp, ahd->description); 564 strcat(bp, ">\n" 565 " "); 566 ahd_controller_info(ahd, ahd_info); 567 strcat(bp, ahd_info); 568 569 return (bp); 570 } 571 572 /* 573 * Queue an SCB to the controller. 574 */ 575 static int 576 ahd_linux_queue_lck(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 577 { 578 struct ahd_softc *ahd; 579 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device); 580 int rtn = SCSI_MLQUEUE_HOST_BUSY; 581 582 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 583 584 cmd->scsi_done = scsi_done; 585 cmd->result = CAM_REQ_INPROG << 16; 586 rtn = ahd_linux_run_command(ahd, dev, cmd); 587 588 return rtn; 589 } 590 591 static DEF_SCSI_QCMD(ahd_linux_queue) 592 593 static struct scsi_target ** 594 ahd_linux_target_in_softc(struct scsi_target *starget) 595 { 596 struct ahd_softc *ahd = 597 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 598 unsigned int target_offset; 599 600 target_offset = starget->id; 601 if (starget->channel != 0) 602 target_offset += 8; 603 604 return &ahd->platform_data->starget[target_offset]; 605 } 606 607 static int 608 ahd_linux_target_alloc(struct scsi_target *starget) 609 { 610 struct ahd_softc *ahd = 611 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 612 struct seeprom_config *sc = ahd->seep_config; 613 unsigned long flags; 614 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 615 struct ahd_devinfo devinfo; 616 struct ahd_initiator_tinfo *tinfo; 617 struct ahd_tmode_tstate *tstate; 618 char channel = starget->channel + 'A'; 619 620 ahd_lock(ahd, &flags); 621 622 BUG_ON(*ahd_targp != NULL); 623 624 *ahd_targp = starget; 625 626 if (sc) { 627 int flags = sc->device_flags[starget->id]; 628 629 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 630 starget->id, &tstate); 631 632 if ((flags & CFPACKETIZED) == 0) { 633 /* don't negotiate packetized (IU) transfers */ 634 spi_max_iu(starget) = 0; 635 } else { 636 if ((ahd->features & AHD_RTI) == 0) 637 spi_rti(starget) = 0; 638 } 639 640 if ((flags & CFQAS) == 0) 641 spi_max_qas(starget) = 0; 642 643 /* Transinfo values have been set to BIOS settings */ 644 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 645 spi_min_period(starget) = tinfo->user.period; 646 spi_max_offset(starget) = tinfo->user.offset; 647 } 648 649 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 650 starget->id, &tstate); 651 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id, 652 CAM_LUN_WILDCARD, channel, 653 ROLE_INITIATOR); 654 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, 655 AHD_TRANS_GOAL, /*paused*/FALSE); 656 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 657 AHD_TRANS_GOAL, /*paused*/FALSE); 658 ahd_unlock(ahd, &flags); 659 660 return 0; 661 } 662 663 static void 664 ahd_linux_target_destroy(struct scsi_target *starget) 665 { 666 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 667 668 *ahd_targp = NULL; 669 } 670 671 static int 672 ahd_linux_slave_alloc(struct scsi_device *sdev) 673 { 674 struct ahd_softc *ahd = 675 *((struct ahd_softc **)sdev->host->hostdata); 676 struct ahd_linux_device *dev; 677 678 if (bootverbose) 679 printk("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id); 680 681 dev = scsi_transport_device_data(sdev); 682 memset(dev, 0, sizeof(*dev)); 683 684 /* 685 * We start out life using untagged 686 * transactions of which we allow one. 687 */ 688 dev->openings = 1; 689 690 /* 691 * Set maxtags to 0. This will be changed if we 692 * later determine that we are dealing with 693 * a tagged queuing capable device. 694 */ 695 dev->maxtags = 0; 696 697 return (0); 698 } 699 700 static int 701 ahd_linux_slave_configure(struct scsi_device *sdev) 702 { 703 struct ahd_softc *ahd; 704 705 ahd = *((struct ahd_softc **)sdev->host->hostdata); 706 if (bootverbose) 707 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 708 709 ahd_linux_device_queue_depth(sdev); 710 711 /* Initial Domain Validation */ 712 if (!spi_initial_dv(sdev->sdev_target)) 713 spi_dv_device(sdev); 714 715 return 0; 716 } 717 718 #if defined(__i386__) 719 /* 720 * Return the disk geometry for the given SCSI device. 721 */ 722 static int 723 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 724 sector_t capacity, int geom[]) 725 { 726 int heads; 727 int sectors; 728 int cylinders; 729 int extended; 730 struct ahd_softc *ahd; 731 732 ahd = *((struct ahd_softc **)sdev->host->hostdata); 733 734 if (scsi_partsize(bdev, capacity, geom)) 735 return 0; 736 737 heads = 64; 738 sectors = 32; 739 cylinders = aic_sector_div(capacity, heads, sectors); 740 741 if (aic79xx_extended != 0) 742 extended = 1; 743 else 744 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 745 if (extended && cylinders >= 1024) { 746 heads = 255; 747 sectors = 63; 748 cylinders = aic_sector_div(capacity, heads, sectors); 749 } 750 geom[0] = heads; 751 geom[1] = sectors; 752 geom[2] = cylinders; 753 return (0); 754 } 755 #endif 756 757 /* 758 * Abort the current SCSI command(s). 759 */ 760 static int 761 ahd_linux_abort(struct scsi_cmnd *cmd) 762 { 763 int error; 764 765 error = ahd_linux_queue_abort_cmd(cmd); 766 767 return error; 768 } 769 770 /* 771 * Attempt to send a target reset message to the device that timed out. 772 */ 773 static int 774 ahd_linux_dev_reset(struct scsi_cmnd *cmd) 775 { 776 struct ahd_softc *ahd; 777 struct ahd_linux_device *dev; 778 struct scb *reset_scb; 779 u_int cdb_byte; 780 int retval = SUCCESS; 781 int paused; 782 int wait; 783 struct ahd_initiator_tinfo *tinfo; 784 struct ahd_tmode_tstate *tstate; 785 unsigned long flags; 786 DECLARE_COMPLETION_ONSTACK(done); 787 788 reset_scb = NULL; 789 paused = FALSE; 790 wait = FALSE; 791 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 792 793 scmd_printk(KERN_INFO, cmd, 794 "Attempting to queue a TARGET RESET message:"); 795 796 printk("CDB:"); 797 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 798 printk(" 0x%x", cmd->cmnd[cdb_byte]); 799 printk("\n"); 800 801 /* 802 * Determine if we currently own this command. 803 */ 804 dev = scsi_transport_device_data(cmd->device); 805 806 if (dev == NULL) { 807 /* 808 * No target device for this command exists, 809 * so we must not still own the command. 810 */ 811 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 812 return SUCCESS; 813 } 814 815 /* 816 * Generate us a new SCB 817 */ 818 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); 819 if (!reset_scb) { 820 scmd_printk(KERN_INFO, cmd, "No SCB available\n"); 821 return FAILED; 822 } 823 824 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 825 cmd->device->id, &tstate); 826 reset_scb->io_ctx = cmd; 827 reset_scb->platform_data->dev = dev; 828 reset_scb->sg_count = 0; 829 ahd_set_residual(reset_scb, 0); 830 ahd_set_sense_residual(reset_scb, 0); 831 reset_scb->platform_data->xfer_len = 0; 832 reset_scb->hscb->control = 0; 833 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd); 834 reset_scb->hscb->lun = cmd->device->lun; 835 reset_scb->hscb->cdb_len = 0; 836 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; 837 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; 838 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 839 reset_scb->flags |= SCB_PACKETIZED; 840 } else { 841 reset_scb->hscb->control |= MK_MESSAGE; 842 } 843 dev->openings--; 844 dev->active++; 845 dev->commands_issued++; 846 847 ahd_lock(ahd, &flags); 848 849 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); 850 ahd_queue_scb(ahd, reset_scb); 851 852 ahd->platform_data->eh_done = &done; 853 ahd_unlock(ahd, &flags); 854 855 printk("%s: Device reset code sleeping\n", ahd_name(ahd)); 856 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 857 ahd_lock(ahd, &flags); 858 ahd->platform_data->eh_done = NULL; 859 ahd_unlock(ahd, &flags); 860 printk("%s: Device reset timer expired (active %d)\n", 861 ahd_name(ahd), dev->active); 862 retval = FAILED; 863 } 864 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); 865 866 return (retval); 867 } 868 869 /* 870 * Reset the SCSI bus. 871 */ 872 static int 873 ahd_linux_bus_reset(struct scsi_cmnd *cmd) 874 { 875 struct ahd_softc *ahd; 876 int found; 877 unsigned long flags; 878 879 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 880 #ifdef AHD_DEBUG 881 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 882 printk("%s: Bus reset called for cmd %p\n", 883 ahd_name(ahd), cmd); 884 #endif 885 ahd_lock(ahd, &flags); 886 887 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 888 /*initiate reset*/TRUE); 889 ahd_unlock(ahd, &flags); 890 891 if (bootverbose) 892 printk("%s: SCSI bus reset delivered. " 893 "%d SCBs aborted.\n", ahd_name(ahd), found); 894 895 return (SUCCESS); 896 } 897 898 struct scsi_host_template aic79xx_driver_template = { 899 .module = THIS_MODULE, 900 .name = "aic79xx", 901 .proc_name = "aic79xx", 902 .show_info = ahd_linux_show_info, 903 .write_info = ahd_proc_write_seeprom, 904 .info = ahd_linux_info, 905 .queuecommand = ahd_linux_queue, 906 .eh_abort_handler = ahd_linux_abort, 907 .eh_device_reset_handler = ahd_linux_dev_reset, 908 .eh_bus_reset_handler = ahd_linux_bus_reset, 909 #if defined(__i386__) 910 .bios_param = ahd_linux_biosparam, 911 #endif 912 .can_queue = AHD_MAX_QUEUE, 913 .this_id = -1, 914 .max_sectors = 8192, 915 .cmd_per_lun = 2, 916 .slave_alloc = ahd_linux_slave_alloc, 917 .slave_configure = ahd_linux_slave_configure, 918 .target_alloc = ahd_linux_target_alloc, 919 .target_destroy = ahd_linux_target_destroy, 920 }; 921 922 /******************************** Bus DMA *************************************/ 923 int 924 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 925 bus_size_t alignment, bus_size_t boundary, 926 dma_addr_t lowaddr, dma_addr_t highaddr, 927 bus_dma_filter_t *filter, void *filterarg, 928 bus_size_t maxsize, int nsegments, 929 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 930 { 931 bus_dma_tag_t dmat; 932 933 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 934 if (dmat == NULL) 935 return (ENOMEM); 936 937 /* 938 * Linux is very simplistic about DMA memory. For now don't 939 * maintain all specification information. Once Linux supplies 940 * better facilities for doing these operations, or the 941 * needs of this particular driver change, we might need to do 942 * more here. 943 */ 944 dmat->alignment = alignment; 945 dmat->boundary = boundary; 946 dmat->maxsize = maxsize; 947 *ret_tag = dmat; 948 return (0); 949 } 950 951 void 952 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 953 { 954 kfree(dmat); 955 } 956 957 int 958 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 959 int flags, bus_dmamap_t *mapp) 960 { 961 *vaddr = pci_alloc_consistent(ahd->dev_softc, 962 dmat->maxsize, mapp); 963 if (*vaddr == NULL) 964 return (ENOMEM); 965 return(0); 966 } 967 968 void 969 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 970 void* vaddr, bus_dmamap_t map) 971 { 972 pci_free_consistent(ahd->dev_softc, dmat->maxsize, 973 vaddr, map); 974 } 975 976 int 977 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 978 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 979 void *cb_arg, int flags) 980 { 981 /* 982 * Assume for now that this will only be used during 983 * initialization and not for per-transaction buffer mapping. 984 */ 985 bus_dma_segment_t stack_sg; 986 987 stack_sg.ds_addr = map; 988 stack_sg.ds_len = dmat->maxsize; 989 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 990 return (0); 991 } 992 993 void 994 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 995 { 996 } 997 998 int 999 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 1000 { 1001 /* Nothing to do */ 1002 return (0); 1003 } 1004 1005 /********************* Platform Dependent Functions ***************************/ 1006 static void 1007 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 1008 { 1009 1010 if ((instance >= 0) 1011 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { 1012 uint8_t *iocell_info; 1013 1014 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 1015 iocell_info[index] = value & 0xFFFF; 1016 if (bootverbose) 1017 printk("iocell[%d:%ld] = %d\n", instance, index, value); 1018 } 1019 } 1020 1021 static void 1022 ahd_linux_setup_tag_info_global(char *p) 1023 { 1024 int tags, i, j; 1025 1026 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 1027 printk("Setting Global Tags= %d\n", tags); 1028 1029 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { 1030 for (j = 0; j < AHD_NUM_TARGETS; j++) { 1031 aic79xx_tag_info[i].tag_commands[j] = tags; 1032 } 1033 } 1034 } 1035 1036 static void 1037 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 1038 { 1039 1040 if ((instance >= 0) && (targ >= 0) 1041 && (instance < ARRAY_SIZE(aic79xx_tag_info)) 1042 && (targ < AHD_NUM_TARGETS)) { 1043 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 1044 if (bootverbose) 1045 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 1046 } 1047 } 1048 1049 static char * 1050 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 1051 void (*callback)(u_long, int, int, int32_t), 1052 u_long callback_arg) 1053 { 1054 char *tok_end; 1055 char *tok_end2; 1056 int i; 1057 int instance; 1058 int targ; 1059 int done; 1060 char tok_list[] = {'.', ',', '{', '}', '\0'}; 1061 1062 /* All options use a ':' name/arg separator */ 1063 if (*opt_arg != ':') 1064 return (opt_arg); 1065 opt_arg++; 1066 instance = -1; 1067 targ = -1; 1068 done = FALSE; 1069 /* 1070 * Restore separator that may be in 1071 * the middle of our option argument. 1072 */ 1073 tok_end = strchr(opt_arg, '\0'); 1074 if (tok_end < end) 1075 *tok_end = ','; 1076 while (!done) { 1077 switch (*opt_arg) { 1078 case '{': 1079 if (instance == -1) { 1080 instance = 0; 1081 } else { 1082 if (depth > 1) { 1083 if (targ == -1) 1084 targ = 0; 1085 } else { 1086 printk("Malformed Option %s\n", 1087 opt_name); 1088 done = TRUE; 1089 } 1090 } 1091 opt_arg++; 1092 break; 1093 case '}': 1094 if (targ != -1) 1095 targ = -1; 1096 else if (instance != -1) 1097 instance = -1; 1098 opt_arg++; 1099 break; 1100 case ',': 1101 case '.': 1102 if (instance == -1) 1103 done = TRUE; 1104 else if (targ >= 0) 1105 targ++; 1106 else if (instance >= 0) 1107 instance++; 1108 opt_arg++; 1109 break; 1110 case '\0': 1111 done = TRUE; 1112 break; 1113 default: 1114 tok_end = end; 1115 for (i = 0; tok_list[i]; i++) { 1116 tok_end2 = strchr(opt_arg, tok_list[i]); 1117 if ((tok_end2) && (tok_end2 < tok_end)) 1118 tok_end = tok_end2; 1119 } 1120 callback(callback_arg, instance, targ, 1121 simple_strtol(opt_arg, NULL, 0)); 1122 opt_arg = tok_end; 1123 break; 1124 } 1125 } 1126 return (opt_arg); 1127 } 1128 1129 /* 1130 * Handle Linux boot parameters. This routine allows for assigning a value 1131 * to a parameter with a ':' between the parameter and the value. 1132 * ie. aic79xx=stpwlev:1,extended 1133 */ 1134 static int 1135 aic79xx_setup(char *s) 1136 { 1137 int i, n; 1138 char *p; 1139 char *end; 1140 1141 static const struct { 1142 const char *name; 1143 uint32_t *flag; 1144 } options[] = { 1145 { "extended", &aic79xx_extended }, 1146 { "no_reset", &aic79xx_no_reset }, 1147 { "verbose", &aic79xx_verbose }, 1148 { "allow_memio", &aic79xx_allow_memio}, 1149 #ifdef AHD_DEBUG 1150 { "debug", &ahd_debug }, 1151 #endif 1152 { "periodic_otag", &aic79xx_periodic_otag }, 1153 { "pci_parity", &aic79xx_pci_parity }, 1154 { "seltime", &aic79xx_seltime }, 1155 { "tag_info", NULL }, 1156 { "global_tag_depth", NULL}, 1157 { "slewrate", NULL }, 1158 { "precomp", NULL }, 1159 { "amplitude", NULL }, 1160 { "slowcrc", &aic79xx_slowcrc }, 1161 }; 1162 1163 end = strchr(s, '\0'); 1164 1165 /* 1166 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1167 * will never be 0 in this case. 1168 */ 1169 n = 0; 1170 1171 while ((p = strsep(&s, ",.")) != NULL) { 1172 if (*p == '\0') 1173 continue; 1174 for (i = 0; i < ARRAY_SIZE(options); i++) { 1175 1176 n = strlen(options[i].name); 1177 if (strncmp(options[i].name, p, n) == 0) 1178 break; 1179 } 1180 if (i == ARRAY_SIZE(options)) 1181 continue; 1182 1183 if (strncmp(p, "global_tag_depth", n) == 0) { 1184 ahd_linux_setup_tag_info_global(p + n); 1185 } else if (strncmp(p, "tag_info", n) == 0) { 1186 s = ahd_parse_brace_option("tag_info", p + n, end, 1187 2, ahd_linux_setup_tag_info, 0); 1188 } else if (strncmp(p, "slewrate", n) == 0) { 1189 s = ahd_parse_brace_option("slewrate", 1190 p + n, end, 1, ahd_linux_setup_iocell_info, 1191 AIC79XX_SLEWRATE_INDEX); 1192 } else if (strncmp(p, "precomp", n) == 0) { 1193 s = ahd_parse_brace_option("precomp", 1194 p + n, end, 1, ahd_linux_setup_iocell_info, 1195 AIC79XX_PRECOMP_INDEX); 1196 } else if (strncmp(p, "amplitude", n) == 0) { 1197 s = ahd_parse_brace_option("amplitude", 1198 p + n, end, 1, ahd_linux_setup_iocell_info, 1199 AIC79XX_AMPLITUDE_INDEX); 1200 } else if (p[n] == ':') { 1201 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1202 } else if (!strncmp(p, "verbose", n)) { 1203 *(options[i].flag) = 1; 1204 } else { 1205 *(options[i].flag) ^= 0xFFFFFFFF; 1206 } 1207 } 1208 return 1; 1209 } 1210 1211 __setup("aic79xx=", aic79xx_setup); 1212 1213 uint32_t aic79xx_verbose; 1214 1215 int 1216 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1217 { 1218 char buf[80]; 1219 struct Scsi_Host *host; 1220 char *new_name; 1221 u_long s; 1222 int retval; 1223 1224 template->name = ahd->description; 1225 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1226 if (host == NULL) 1227 return (ENOMEM); 1228 1229 *((struct ahd_softc **)host->hostdata) = ahd; 1230 ahd->platform_data->host = host; 1231 host->can_queue = AHD_MAX_QUEUE; 1232 host->cmd_per_lun = 2; 1233 host->sg_tablesize = AHD_NSEG; 1234 host->this_id = ahd->our_id; 1235 host->irq = ahd->platform_data->irq; 1236 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1237 host->max_lun = AHD_NUM_LUNS; 1238 host->max_channel = 0; 1239 host->sg_tablesize = AHD_NSEG; 1240 ahd_lock(ahd, &s); 1241 ahd_set_unit(ahd, ahd_linux_unit++); 1242 ahd_unlock(ahd, &s); 1243 sprintf(buf, "scsi%d", host->host_no); 1244 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1245 if (new_name != NULL) { 1246 strcpy(new_name, buf); 1247 ahd_set_name(ahd, new_name); 1248 } 1249 host->unique_id = ahd->unit; 1250 ahd_linux_initialize_scsi_bus(ahd); 1251 ahd_intr_enable(ahd, TRUE); 1252 1253 host->transportt = ahd_linux_transport_template; 1254 1255 retval = scsi_add_host(host, &ahd->dev_softc->dev); 1256 if (retval) { 1257 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); 1258 scsi_host_put(host); 1259 return retval; 1260 } 1261 1262 scsi_scan_host(host); 1263 return 0; 1264 } 1265 1266 /* 1267 * Place the SCSI bus into a known state by either resetting it, 1268 * or forcing transfer negotiations on the next command to any 1269 * target. 1270 */ 1271 static void 1272 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1273 { 1274 u_int target_id; 1275 u_int numtarg; 1276 unsigned long s; 1277 1278 target_id = 0; 1279 numtarg = 0; 1280 1281 if (aic79xx_no_reset != 0) 1282 ahd->flags &= ~AHD_RESET_BUS_A; 1283 1284 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1285 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1286 else 1287 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1288 1289 ahd_lock(ahd, &s); 1290 1291 /* 1292 * Force negotiation to async for all targets that 1293 * will not see an initial bus reset. 1294 */ 1295 for (; target_id < numtarg; target_id++) { 1296 struct ahd_devinfo devinfo; 1297 struct ahd_initiator_tinfo *tinfo; 1298 struct ahd_tmode_tstate *tstate; 1299 1300 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1301 target_id, &tstate); 1302 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1303 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1304 ahd_update_neg_request(ahd, &devinfo, tstate, 1305 tinfo, AHD_NEG_ALWAYS); 1306 } 1307 ahd_unlock(ahd, &s); 1308 /* Give the bus some time to recover */ 1309 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1310 ahd_freeze_simq(ahd); 1311 msleep(AIC79XX_RESET_DELAY); 1312 ahd_release_simq(ahd); 1313 } 1314 } 1315 1316 int 1317 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1318 { 1319 ahd->platform_data = 1320 kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC); 1321 if (ahd->platform_data == NULL) 1322 return (ENOMEM); 1323 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1324 ahd_lockinit(ahd); 1325 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1326 return (0); 1327 } 1328 1329 void 1330 ahd_platform_free(struct ahd_softc *ahd) 1331 { 1332 struct scsi_target *starget; 1333 int i; 1334 1335 if (ahd->platform_data != NULL) { 1336 /* destroy all of the device and target objects */ 1337 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1338 starget = ahd->platform_data->starget[i]; 1339 if (starget != NULL) { 1340 ahd->platform_data->starget[i] = NULL; 1341 } 1342 } 1343 1344 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1345 free_irq(ahd->platform_data->irq, ahd); 1346 if (ahd->tags[0] == BUS_SPACE_PIO 1347 && ahd->bshs[0].ioport != 0) 1348 release_region(ahd->bshs[0].ioport, 256); 1349 if (ahd->tags[1] == BUS_SPACE_PIO 1350 && ahd->bshs[1].ioport != 0) 1351 release_region(ahd->bshs[1].ioport, 256); 1352 if (ahd->tags[0] == BUS_SPACE_MEMIO 1353 && ahd->bshs[0].maddr != NULL) { 1354 iounmap(ahd->bshs[0].maddr); 1355 release_mem_region(ahd->platform_data->mem_busaddr, 1356 0x1000); 1357 } 1358 if (ahd->platform_data->host) 1359 scsi_host_put(ahd->platform_data->host); 1360 1361 kfree(ahd->platform_data); 1362 } 1363 } 1364 1365 void 1366 ahd_platform_init(struct ahd_softc *ahd) 1367 { 1368 /* 1369 * Lookup and commit any modified IO Cell options. 1370 */ 1371 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 1372 const struct ahd_linux_iocell_opts *iocell_opts; 1373 1374 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1375 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1376 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1377 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1378 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1379 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1380 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1381 } 1382 1383 } 1384 1385 void 1386 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1387 { 1388 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1389 SCB_GET_CHANNEL(ahd, scb), 1390 SCB_GET_LUN(scb), SCB_LIST_NULL, 1391 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1392 } 1393 1394 void 1395 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev, 1396 struct ahd_devinfo *devinfo, ahd_queue_alg alg) 1397 { 1398 struct ahd_linux_device *dev; 1399 int was_queuing; 1400 int now_queuing; 1401 1402 if (sdev == NULL) 1403 return; 1404 1405 dev = scsi_transport_device_data(sdev); 1406 1407 if (dev == NULL) 1408 return; 1409 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1410 switch (alg) { 1411 default: 1412 case AHD_QUEUE_NONE: 1413 now_queuing = 0; 1414 break; 1415 case AHD_QUEUE_BASIC: 1416 now_queuing = AHD_DEV_Q_BASIC; 1417 break; 1418 case AHD_QUEUE_TAGGED: 1419 now_queuing = AHD_DEV_Q_TAGGED; 1420 break; 1421 } 1422 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1423 && (was_queuing != now_queuing) 1424 && (dev->active != 0)) { 1425 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1426 dev->qfrozen++; 1427 } 1428 1429 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1430 if (now_queuing) { 1431 u_int usertags; 1432 1433 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1434 if (!was_queuing) { 1435 /* 1436 * Start out aggressively and allow our 1437 * dynamic queue depth algorithm to take 1438 * care of the rest. 1439 */ 1440 dev->maxtags = usertags; 1441 dev->openings = dev->maxtags - dev->active; 1442 } 1443 if (dev->maxtags == 0) { 1444 /* 1445 * Queueing is disabled by the user. 1446 */ 1447 dev->openings = 1; 1448 } else if (alg == AHD_QUEUE_TAGGED) { 1449 dev->flags |= AHD_DEV_Q_TAGGED; 1450 if (aic79xx_periodic_otag != 0) 1451 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1452 } else 1453 dev->flags |= AHD_DEV_Q_BASIC; 1454 } else { 1455 /* We can only have one opening. */ 1456 dev->maxtags = 0; 1457 dev->openings = 1 - dev->active; 1458 } 1459 1460 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1461 case AHD_DEV_Q_BASIC: 1462 case AHD_DEV_Q_TAGGED: 1463 scsi_change_queue_depth(sdev, 1464 dev->openings + dev->active); 1465 break; 1466 default: 1467 /* 1468 * We allow the OS to queue 2 untagged transactions to 1469 * us at any time even though we can only execute them 1470 * serially on the controller/device. This should 1471 * remove some latency. 1472 */ 1473 scsi_change_queue_depth(sdev, 1); 1474 break; 1475 } 1476 } 1477 1478 int 1479 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1480 int lun, u_int tag, role_t role, uint32_t status) 1481 { 1482 return 0; 1483 } 1484 1485 static u_int 1486 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1487 { 1488 static int warned_user; 1489 u_int tags; 1490 1491 tags = 0; 1492 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1493 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { 1494 1495 if (warned_user == 0) { 1496 printk(KERN_WARNING 1497 "aic79xx: WARNING: Insufficient tag_info instances\n" 1498 "aic79xx: for installed controllers. Using defaults\n" 1499 "aic79xx: Please update the aic79xx_tag_info array in\n" 1500 "aic79xx: the aic79xx_osm.c source file.\n"); 1501 warned_user++; 1502 } 1503 tags = AHD_MAX_QUEUE; 1504 } else { 1505 adapter_tag_info_t *tag_info; 1506 1507 tag_info = &aic79xx_tag_info[ahd->unit]; 1508 tags = tag_info->tag_commands[devinfo->target_offset]; 1509 if (tags > AHD_MAX_QUEUE) 1510 tags = AHD_MAX_QUEUE; 1511 } 1512 } 1513 return (tags); 1514 } 1515 1516 /* 1517 * Determines the queue depth for a given device. 1518 */ 1519 static void 1520 ahd_linux_device_queue_depth(struct scsi_device *sdev) 1521 { 1522 struct ahd_devinfo devinfo; 1523 u_int tags; 1524 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1525 1526 ahd_compile_devinfo(&devinfo, 1527 ahd->our_id, 1528 sdev->sdev_target->id, sdev->lun, 1529 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1530 ROLE_INITIATOR); 1531 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1532 if (tags != 0 && sdev->tagged_supported != 0) { 1533 1534 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); 1535 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1536 devinfo.lun, AC_TRANSFER_NEG); 1537 ahd_print_devinfo(ahd, &devinfo); 1538 printk("Tagged Queuing enabled. Depth %d\n", tags); 1539 } else { 1540 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); 1541 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1542 devinfo.lun, AC_TRANSFER_NEG); 1543 } 1544 } 1545 1546 static int 1547 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1548 struct scsi_cmnd *cmd) 1549 { 1550 struct scb *scb; 1551 struct hardware_scb *hscb; 1552 struct ahd_initiator_tinfo *tinfo; 1553 struct ahd_tmode_tstate *tstate; 1554 u_int col_idx; 1555 uint16_t mask; 1556 unsigned long flags; 1557 int nseg; 1558 1559 nseg = scsi_dma_map(cmd); 1560 if (nseg < 0) 1561 return SCSI_MLQUEUE_HOST_BUSY; 1562 1563 ahd_lock(ahd, &flags); 1564 1565 /* 1566 * Get an scb to use. 1567 */ 1568 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1569 cmd->device->id, &tstate); 1570 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1571 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1572 col_idx = AHD_NEVER_COL_IDX; 1573 } else { 1574 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1575 cmd->device->lun); 1576 } 1577 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1578 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1579 ahd_unlock(ahd, &flags); 1580 scsi_dma_unmap(cmd); 1581 return SCSI_MLQUEUE_HOST_BUSY; 1582 } 1583 1584 scb->io_ctx = cmd; 1585 scb->platform_data->dev = dev; 1586 hscb = scb->hscb; 1587 cmd->host_scribble = (char *)scb; 1588 1589 /* 1590 * Fill out basics of the HSCB. 1591 */ 1592 hscb->control = 0; 1593 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1594 hscb->lun = cmd->device->lun; 1595 scb->hscb->task_management = 0; 1596 mask = SCB_GET_TARGET_MASK(ahd, scb); 1597 1598 if ((ahd->user_discenable & mask) != 0) 1599 hscb->control |= DISCENB; 1600 1601 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1602 scb->flags |= SCB_PACKETIZED; 1603 1604 if ((tstate->auto_negotiate & mask) != 0) { 1605 scb->flags |= SCB_AUTO_NEGOTIATE; 1606 scb->hscb->control |= MK_MESSAGE; 1607 } 1608 1609 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1610 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1611 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1612 hscb->control |= MSG_ORDERED_TASK; 1613 dev->commands_since_idle_or_otag = 0; 1614 } else { 1615 hscb->control |= MSG_SIMPLE_TASK; 1616 } 1617 } 1618 1619 hscb->cdb_len = cmd->cmd_len; 1620 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1621 1622 scb->platform_data->xfer_len = 0; 1623 ahd_set_residual(scb, 0); 1624 ahd_set_sense_residual(scb, 0); 1625 scb->sg_count = 0; 1626 1627 if (nseg > 0) { 1628 void *sg = scb->sg_list; 1629 struct scatterlist *cur_seg; 1630 int i; 1631 1632 scb->platform_data->xfer_len = 0; 1633 1634 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1635 dma_addr_t addr; 1636 bus_size_t len; 1637 1638 addr = sg_dma_address(cur_seg); 1639 len = sg_dma_len(cur_seg); 1640 scb->platform_data->xfer_len += len; 1641 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1642 i == (nseg - 1)); 1643 } 1644 } 1645 1646 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1647 dev->openings--; 1648 dev->active++; 1649 dev->commands_issued++; 1650 1651 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1652 dev->commands_since_idle_or_otag++; 1653 scb->flags |= SCB_ACTIVE; 1654 ahd_queue_scb(ahd, scb); 1655 1656 ahd_unlock(ahd, &flags); 1657 1658 return 0; 1659 } 1660 1661 /* 1662 * SCSI controller interrupt handler. 1663 */ 1664 irqreturn_t 1665 ahd_linux_isr(int irq, void *dev_id) 1666 { 1667 struct ahd_softc *ahd; 1668 u_long flags; 1669 int ours; 1670 1671 ahd = (struct ahd_softc *) dev_id; 1672 ahd_lock(ahd, &flags); 1673 ours = ahd_intr(ahd); 1674 ahd_unlock(ahd, &flags); 1675 return IRQ_RETVAL(ours); 1676 } 1677 1678 void 1679 ahd_send_async(struct ahd_softc *ahd, char channel, 1680 u_int target, u_int lun, ac_code code) 1681 { 1682 switch (code) { 1683 case AC_TRANSFER_NEG: 1684 { 1685 struct scsi_target *starget; 1686 struct ahd_initiator_tinfo *tinfo; 1687 struct ahd_tmode_tstate *tstate; 1688 unsigned int target_ppr_options; 1689 1690 BUG_ON(target == CAM_TARGET_WILDCARD); 1691 1692 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1693 target, &tstate); 1694 1695 /* 1696 * Don't bother reporting results while 1697 * negotiations are still pending. 1698 */ 1699 if (tinfo->curr.period != tinfo->goal.period 1700 || tinfo->curr.width != tinfo->goal.width 1701 || tinfo->curr.offset != tinfo->goal.offset 1702 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1703 if (bootverbose == 0) 1704 break; 1705 1706 /* 1707 * Don't bother reporting results that 1708 * are identical to those last reported. 1709 */ 1710 starget = ahd->platform_data->starget[target]; 1711 if (starget == NULL) 1712 break; 1713 1714 target_ppr_options = 1715 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1716 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1717 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1718 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1719 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1720 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1721 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1722 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1723 1724 if (tinfo->curr.period == spi_period(starget) 1725 && tinfo->curr.width == spi_width(starget) 1726 && tinfo->curr.offset == spi_offset(starget) 1727 && tinfo->curr.ppr_options == target_ppr_options) 1728 if (bootverbose == 0) 1729 break; 1730 1731 spi_period(starget) = tinfo->curr.period; 1732 spi_width(starget) = tinfo->curr.width; 1733 spi_offset(starget) = tinfo->curr.offset; 1734 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1735 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1736 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1737 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1738 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1739 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1740 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1741 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1742 spi_display_xfer_agreement(starget); 1743 break; 1744 } 1745 case AC_SENT_BDR: 1746 { 1747 WARN_ON(lun != CAM_LUN_WILDCARD); 1748 scsi_report_device_reset(ahd->platform_data->host, 1749 channel - 'A', target); 1750 break; 1751 } 1752 case AC_BUS_RESET: 1753 if (ahd->platform_data->host != NULL) { 1754 scsi_report_bus_reset(ahd->platform_data->host, 1755 channel - 'A'); 1756 } 1757 break; 1758 default: 1759 panic("ahd_send_async: Unexpected async event"); 1760 } 1761 } 1762 1763 /* 1764 * Calls the higher level scsi done function and frees the scb. 1765 */ 1766 void 1767 ahd_done(struct ahd_softc *ahd, struct scb *scb) 1768 { 1769 struct scsi_cmnd *cmd; 1770 struct ahd_linux_device *dev; 1771 1772 if ((scb->flags & SCB_ACTIVE) == 0) { 1773 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1774 ahd_dump_card_state(ahd); 1775 panic("Stopping for safety"); 1776 } 1777 LIST_REMOVE(scb, pending_links); 1778 cmd = scb->io_ctx; 1779 dev = scb->platform_data->dev; 1780 dev->active--; 1781 dev->openings++; 1782 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1783 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1784 dev->qfrozen--; 1785 } 1786 ahd_linux_unmap_scb(ahd, scb); 1787 1788 /* 1789 * Guard against stale sense data. 1790 * The Linux mid-layer assumes that sense 1791 * was retrieved anytime the first byte of 1792 * the sense buffer looks "sane". 1793 */ 1794 cmd->sense_buffer[0] = 0; 1795 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1796 uint32_t amount_xferred; 1797 1798 amount_xferred = 1799 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1800 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1801 #ifdef AHD_DEBUG 1802 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1803 ahd_print_path(ahd, scb); 1804 printk("Set CAM_UNCOR_PARITY\n"); 1805 } 1806 #endif 1807 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1808 #ifdef AHD_REPORT_UNDERFLOWS 1809 /* 1810 * This code is disabled by default as some 1811 * clients of the SCSI system do not properly 1812 * initialize the underflow parameter. This 1813 * results in spurious termination of commands 1814 * that complete as expected (e.g. underflow is 1815 * allowed as command can return variable amounts 1816 * of data. 1817 */ 1818 } else if (amount_xferred < scb->io_ctx->underflow) { 1819 u_int i; 1820 1821 ahd_print_path(ahd, scb); 1822 printk("CDB:"); 1823 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1824 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1825 printk("\n"); 1826 ahd_print_path(ahd, scb); 1827 printk("Saw underflow (%ld of %ld bytes). " 1828 "Treated as error\n", 1829 ahd_get_residual(scb), 1830 ahd_get_transfer_length(scb)); 1831 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1832 #endif 1833 } else { 1834 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1835 } 1836 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1837 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1838 } 1839 1840 if (dev->openings == 1 1841 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1842 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1843 dev->tag_success_count++; 1844 /* 1845 * Some devices deal with temporary internal resource 1846 * shortages by returning queue full. When the queue 1847 * full occurrs, we throttle back. Slowly try to get 1848 * back to our previous queue depth. 1849 */ 1850 if ((dev->openings + dev->active) < dev->maxtags 1851 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1852 dev->tag_success_count = 0; 1853 dev->openings++; 1854 } 1855 1856 if (dev->active == 0) 1857 dev->commands_since_idle_or_otag = 0; 1858 1859 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1860 printk("Recovery SCB completes\n"); 1861 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1862 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1863 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1864 1865 if (ahd->platform_data->eh_done) 1866 complete(ahd->platform_data->eh_done); 1867 } 1868 1869 ahd_free_scb(ahd, scb); 1870 ahd_linux_queue_cmd_complete(ahd, cmd); 1871 } 1872 1873 static void 1874 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1875 struct scsi_device *sdev, struct scb *scb) 1876 { 1877 struct ahd_devinfo devinfo; 1878 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1879 1880 ahd_compile_devinfo(&devinfo, 1881 ahd->our_id, 1882 sdev->sdev_target->id, sdev->lun, 1883 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1884 ROLE_INITIATOR); 1885 1886 /* 1887 * We don't currently trust the mid-layer to 1888 * properly deal with queue full or busy. So, 1889 * when one occurs, we tell the mid-layer to 1890 * unconditionally requeue the command to us 1891 * so that we can retry it ourselves. We also 1892 * implement our own throttling mechanism so 1893 * we don't clobber the device with too many 1894 * commands. 1895 */ 1896 switch (ahd_get_scsi_status(scb)) { 1897 default: 1898 break; 1899 case SCSI_STATUS_CHECK_COND: 1900 case SCSI_STATUS_CMD_TERMINATED: 1901 { 1902 struct scsi_cmnd *cmd; 1903 1904 /* 1905 * Copy sense information to the OS's cmd 1906 * structure if it is available. 1907 */ 1908 cmd = scb->io_ctx; 1909 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1910 struct scsi_status_iu_header *siu; 1911 u_int sense_size; 1912 u_int sense_offset; 1913 1914 if (scb->flags & SCB_SENSE) { 1915 sense_size = min(sizeof(struct scsi_sense_data) 1916 - ahd_get_sense_residual(scb), 1917 (u_long)SCSI_SENSE_BUFFERSIZE); 1918 sense_offset = 0; 1919 } else { 1920 /* 1921 * Copy only the sense data into the provided 1922 * buffer. 1923 */ 1924 siu = (struct scsi_status_iu_header *) 1925 scb->sense_data; 1926 sense_size = min_t(size_t, 1927 scsi_4btoul(siu->sense_length), 1928 SCSI_SENSE_BUFFERSIZE); 1929 sense_offset = SIU_SENSE_OFFSET(siu); 1930 } 1931 1932 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1933 memcpy(cmd->sense_buffer, 1934 ahd_get_sense_buf(ahd, scb) 1935 + sense_offset, sense_size); 1936 cmd->result |= (DRIVER_SENSE << 24); 1937 1938 #ifdef AHD_DEBUG 1939 if (ahd_debug & AHD_SHOW_SENSE) { 1940 int i; 1941 1942 printk("Copied %d bytes of sense data at %d:", 1943 sense_size, sense_offset); 1944 for (i = 0; i < sense_size; i++) { 1945 if ((i & 0xF) == 0) 1946 printk("\n"); 1947 printk("0x%x ", cmd->sense_buffer[i]); 1948 } 1949 printk("\n"); 1950 } 1951 #endif 1952 } 1953 break; 1954 } 1955 case SCSI_STATUS_QUEUE_FULL: 1956 /* 1957 * By the time the core driver has returned this 1958 * command, all other commands that were queued 1959 * to us but not the device have been returned. 1960 * This ensures that dev->active is equal to 1961 * the number of commands actually queued to 1962 * the device. 1963 */ 1964 dev->tag_success_count = 0; 1965 if (dev->active != 0) { 1966 /* 1967 * Drop our opening count to the number 1968 * of commands currently outstanding. 1969 */ 1970 dev->openings = 0; 1971 #ifdef AHD_DEBUG 1972 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1973 ahd_print_path(ahd, scb); 1974 printk("Dropping tag count to %d\n", 1975 dev->active); 1976 } 1977 #endif 1978 if (dev->active == dev->tags_on_last_queuefull) { 1979 1980 dev->last_queuefull_same_count++; 1981 /* 1982 * If we repeatedly see a queue full 1983 * at the same queue depth, this 1984 * device has a fixed number of tag 1985 * slots. Lock in this tag depth 1986 * so we stop seeing queue fulls from 1987 * this device. 1988 */ 1989 if (dev->last_queuefull_same_count 1990 == AHD_LOCK_TAGS_COUNT) { 1991 dev->maxtags = dev->active; 1992 ahd_print_path(ahd, scb); 1993 printk("Locking max tag count at %d\n", 1994 dev->active); 1995 } 1996 } else { 1997 dev->tags_on_last_queuefull = dev->active; 1998 dev->last_queuefull_same_count = 0; 1999 } 2000 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 2001 ahd_set_scsi_status(scb, SCSI_STATUS_OK); 2002 ahd_platform_set_tags(ahd, sdev, &devinfo, 2003 (dev->flags & AHD_DEV_Q_BASIC) 2004 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2005 break; 2006 } 2007 /* 2008 * Drop down to a single opening, and treat this 2009 * as if the target returned BUSY SCSI status. 2010 */ 2011 dev->openings = 1; 2012 ahd_platform_set_tags(ahd, sdev, &devinfo, 2013 (dev->flags & AHD_DEV_Q_BASIC) 2014 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2015 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); 2016 } 2017 } 2018 2019 static void 2020 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 2021 { 2022 int status; 2023 int new_status = DID_OK; 2024 int do_fallback = 0; 2025 int scsi_status; 2026 2027 /* 2028 * Map CAM error codes into Linux Error codes. We 2029 * avoid the conversion so that the DV code has the 2030 * full error information available when making 2031 * state change decisions. 2032 */ 2033 2034 status = ahd_cmd_get_transaction_status(cmd); 2035 switch (status) { 2036 case CAM_REQ_INPROG: 2037 case CAM_REQ_CMP: 2038 new_status = DID_OK; 2039 break; 2040 case CAM_AUTOSENSE_FAIL: 2041 new_status = DID_ERROR; 2042 /* Fallthrough */ 2043 case CAM_SCSI_STATUS_ERROR: 2044 scsi_status = ahd_cmd_get_scsi_status(cmd); 2045 2046 switch(scsi_status) { 2047 case SCSI_STATUS_CMD_TERMINATED: 2048 case SCSI_STATUS_CHECK_COND: 2049 if ((cmd->result >> 24) != DRIVER_SENSE) { 2050 do_fallback = 1; 2051 } else { 2052 struct scsi_sense_data *sense; 2053 2054 sense = (struct scsi_sense_data *) 2055 cmd->sense_buffer; 2056 if (sense->extra_len >= 5 && 2057 (sense->add_sense_code == 0x47 2058 || sense->add_sense_code == 0x48)) 2059 do_fallback = 1; 2060 } 2061 break; 2062 default: 2063 break; 2064 } 2065 break; 2066 case CAM_REQ_ABORTED: 2067 new_status = DID_ABORT; 2068 break; 2069 case CAM_BUSY: 2070 new_status = DID_BUS_BUSY; 2071 break; 2072 case CAM_REQ_INVALID: 2073 case CAM_PATH_INVALID: 2074 new_status = DID_BAD_TARGET; 2075 break; 2076 case CAM_SEL_TIMEOUT: 2077 new_status = DID_NO_CONNECT; 2078 break; 2079 case CAM_SCSI_BUS_RESET: 2080 case CAM_BDR_SENT: 2081 new_status = DID_RESET; 2082 break; 2083 case CAM_UNCOR_PARITY: 2084 new_status = DID_PARITY; 2085 do_fallback = 1; 2086 break; 2087 case CAM_CMD_TIMEOUT: 2088 new_status = DID_TIME_OUT; 2089 do_fallback = 1; 2090 break; 2091 case CAM_REQ_CMP_ERR: 2092 case CAM_UNEXP_BUSFREE: 2093 case CAM_DATA_RUN_ERR: 2094 new_status = DID_ERROR; 2095 do_fallback = 1; 2096 break; 2097 case CAM_UA_ABORT: 2098 case CAM_NO_HBA: 2099 case CAM_SEQUENCE_FAIL: 2100 case CAM_CCB_LEN_ERR: 2101 case CAM_PROVIDE_FAIL: 2102 case CAM_REQ_TERMIO: 2103 case CAM_UNREC_HBA_ERROR: 2104 case CAM_REQ_TOO_BIG: 2105 new_status = DID_ERROR; 2106 break; 2107 case CAM_REQUEUE_REQ: 2108 new_status = DID_REQUEUE; 2109 break; 2110 default: 2111 /* We should never get here */ 2112 new_status = DID_ERROR; 2113 break; 2114 } 2115 2116 if (do_fallback) { 2117 printk("%s: device overrun (status %x) on %d:%d:%d\n", 2118 ahd_name(ahd), status, cmd->device->channel, 2119 cmd->device->id, (u8)cmd->device->lun); 2120 } 2121 2122 ahd_cmd_set_transaction_status(cmd, new_status); 2123 2124 cmd->scsi_done(cmd); 2125 } 2126 2127 static void 2128 ahd_freeze_simq(struct ahd_softc *ahd) 2129 { 2130 scsi_block_requests(ahd->platform_data->host); 2131 } 2132 2133 static void 2134 ahd_release_simq(struct ahd_softc *ahd) 2135 { 2136 scsi_unblock_requests(ahd->platform_data->host); 2137 } 2138 2139 static int 2140 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2141 { 2142 struct ahd_softc *ahd; 2143 struct ahd_linux_device *dev; 2144 struct scb *pending_scb; 2145 u_int saved_scbptr; 2146 u_int active_scbptr; 2147 u_int last_phase; 2148 u_int saved_scsiid; 2149 u_int cdb_byte; 2150 int retval; 2151 int was_paused; 2152 int paused; 2153 int wait; 2154 int disconnected; 2155 ahd_mode_state saved_modes; 2156 unsigned long flags; 2157 2158 pending_scb = NULL; 2159 paused = FALSE; 2160 wait = FALSE; 2161 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2162 2163 scmd_printk(KERN_INFO, cmd, 2164 "Attempting to queue an ABORT message:"); 2165 2166 printk("CDB:"); 2167 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2168 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2169 printk("\n"); 2170 2171 ahd_lock(ahd, &flags); 2172 2173 /* 2174 * First determine if we currently own this command. 2175 * Start by searching the device queue. If not found 2176 * there, check the pending_scb list. If not found 2177 * at all, and the system wanted us to just abort the 2178 * command, return success. 2179 */ 2180 dev = scsi_transport_device_data(cmd->device); 2181 2182 if (dev == NULL) { 2183 /* 2184 * No target device for this command exists, 2185 * so we must not still own the command. 2186 */ 2187 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2188 retval = SUCCESS; 2189 goto no_cmd; 2190 } 2191 2192 /* 2193 * See if we can find a matching cmd in the pending list. 2194 */ 2195 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2196 if (pending_scb->io_ctx == cmd) 2197 break; 2198 } 2199 2200 if (pending_scb == NULL) { 2201 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2202 goto no_cmd; 2203 } 2204 2205 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2206 /* 2207 * We can't queue two recovery actions using the same SCB 2208 */ 2209 retval = FAILED; 2210 goto done; 2211 } 2212 2213 /* 2214 * Ensure that the card doesn't do anything 2215 * behind our back. Also make sure that we 2216 * didn't "just" miss an interrupt that would 2217 * affect this cmd. 2218 */ 2219 was_paused = ahd_is_paused(ahd); 2220 ahd_pause_and_flushwork(ahd); 2221 paused = TRUE; 2222 2223 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2224 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2225 goto no_cmd; 2226 } 2227 2228 printk("%s: At time of recovery, card was %spaused\n", 2229 ahd_name(ahd), was_paused ? "" : "not "); 2230 ahd_dump_card_state(ahd); 2231 2232 disconnected = TRUE; 2233 if (ahd_search_qinfifo(ahd, cmd->device->id, 2234 cmd->device->channel + 'A', 2235 cmd->device->lun, 2236 pending_scb->hscb->tag, 2237 ROLE_INITIATOR, CAM_REQ_ABORTED, 2238 SEARCH_COMPLETE) > 0) { 2239 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2240 ahd_name(ahd), cmd->device->channel, 2241 cmd->device->id, (u8)cmd->device->lun); 2242 retval = SUCCESS; 2243 goto done; 2244 } 2245 2246 saved_modes = ahd_save_modes(ahd); 2247 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2248 last_phase = ahd_inb(ahd, LASTPHASE); 2249 saved_scbptr = ahd_get_scbptr(ahd); 2250 active_scbptr = saved_scbptr; 2251 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2252 struct scb *bus_scb; 2253 2254 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2255 if (bus_scb == pending_scb) 2256 disconnected = FALSE; 2257 } 2258 2259 /* 2260 * At this point, pending_scb is the scb associated with the 2261 * passed in command. That command is currently active on the 2262 * bus or is in the disconnected state. 2263 */ 2264 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); 2265 if (last_phase != P_BUSFREE 2266 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2267 2268 /* 2269 * We're active on the bus, so assert ATN 2270 * and hope that the target responds. 2271 */ 2272 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2273 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2274 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2275 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2276 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2277 wait = TRUE; 2278 } else if (disconnected) { 2279 2280 /* 2281 * Actually re-queue this SCB in an attempt 2282 * to select the device before it reconnects. 2283 */ 2284 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2285 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2286 pending_scb->hscb->cdb_len = 0; 2287 pending_scb->hscb->task_attribute = 0; 2288 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2289 2290 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2291 /* 2292 * Mark the SCB has having an outstanding 2293 * task management function. Should the command 2294 * complete normally before the task management 2295 * function can be sent, the host will be notified 2296 * to abort our requeued SCB. 2297 */ 2298 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2299 pending_scb->hscb->task_management); 2300 } else { 2301 /* 2302 * If non-packetized, set the MK_MESSAGE control 2303 * bit indicating that we desire to send a message. 2304 * We also set the disconnected flag since there is 2305 * no guarantee that our SCB control byte matches 2306 * the version on the card. We don't want the 2307 * sequencer to abort the command thinking an 2308 * unsolicited reselection occurred. 2309 */ 2310 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2311 2312 /* 2313 * The sequencer will never re-reference the 2314 * in-core SCB. To make sure we are notified 2315 * during reselection, set the MK_MESSAGE flag in 2316 * the card's copy of the SCB. 2317 */ 2318 ahd_outb(ahd, SCB_CONTROL, 2319 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2320 } 2321 2322 /* 2323 * Clear out any entries in the QINFIFO first 2324 * so we are the next SCB for this target 2325 * to run. 2326 */ 2327 ahd_search_qinfifo(ahd, cmd->device->id, 2328 cmd->device->channel + 'A', cmd->device->lun, 2329 SCB_LIST_NULL, ROLE_INITIATOR, 2330 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2331 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2332 ahd_set_scbptr(ahd, saved_scbptr); 2333 ahd_print_path(ahd, pending_scb); 2334 printk("Device is disconnected, re-queuing SCB\n"); 2335 wait = TRUE; 2336 } else { 2337 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2338 retval = FAILED; 2339 goto done; 2340 } 2341 2342 no_cmd: 2343 /* 2344 * Our assumption is that if we don't have the command, no 2345 * recovery action was required, so we return success. Again, 2346 * the semantics of the mid-layer recovery engine are not 2347 * well defined, so this may change in time. 2348 */ 2349 retval = SUCCESS; 2350 done: 2351 if (paused) 2352 ahd_unpause(ahd); 2353 if (wait) { 2354 DECLARE_COMPLETION_ONSTACK(done); 2355 2356 ahd->platform_data->eh_done = &done; 2357 ahd_unlock(ahd, &flags); 2358 2359 printk("%s: Recovery code sleeping\n", ahd_name(ahd)); 2360 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2361 ahd_lock(ahd, &flags); 2362 ahd->platform_data->eh_done = NULL; 2363 ahd_unlock(ahd, &flags); 2364 printk("%s: Timer Expired (active %d)\n", 2365 ahd_name(ahd), dev->active); 2366 retval = FAILED; 2367 } 2368 printk("Recovery code awake\n"); 2369 } else 2370 ahd_unlock(ahd, &flags); 2371 2372 if (retval != SUCCESS) 2373 printk("%s: Command abort returning 0x%x\n", 2374 ahd_name(ahd), retval); 2375 2376 return retval; 2377 } 2378 2379 static void ahd_linux_set_width(struct scsi_target *starget, int width) 2380 { 2381 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2382 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2383 struct ahd_devinfo devinfo; 2384 unsigned long flags; 2385 2386 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2387 starget->channel + 'A', ROLE_INITIATOR); 2388 ahd_lock(ahd, &flags); 2389 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2390 ahd_unlock(ahd, &flags); 2391 } 2392 2393 static void ahd_linux_set_period(struct scsi_target *starget, int period) 2394 { 2395 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2396 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2397 struct ahd_tmode_tstate *tstate; 2398 struct ahd_initiator_tinfo *tinfo 2399 = ahd_fetch_transinfo(ahd, 2400 starget->channel + 'A', 2401 shost->this_id, starget->id, &tstate); 2402 struct ahd_devinfo devinfo; 2403 unsigned int ppr_options = tinfo->goal.ppr_options; 2404 unsigned int dt; 2405 unsigned long flags; 2406 unsigned long offset = tinfo->goal.offset; 2407 2408 #ifdef AHD_DEBUG 2409 if ((ahd_debug & AHD_SHOW_DV) != 0) 2410 printk("%s: set period to %d\n", ahd_name(ahd), period); 2411 #endif 2412 if (offset == 0) 2413 offset = MAX_OFFSET; 2414 2415 if (period < 8) 2416 period = 8; 2417 if (period < 10) { 2418 if (spi_max_width(starget)) { 2419 ppr_options |= MSG_EXT_PPR_DT_REQ; 2420 if (period == 8) 2421 ppr_options |= MSG_EXT_PPR_IU_REQ; 2422 } else 2423 period = 10; 2424 } 2425 2426 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2427 2428 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2429 starget->channel + 'A', ROLE_INITIATOR); 2430 2431 /* all PPR requests apart from QAS require wide transfers */ 2432 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2433 if (spi_width(starget) == 0) 2434 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2435 } 2436 2437 ahd_find_syncrate(ahd, &period, &ppr_options, 2438 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2439 2440 ahd_lock(ahd, &flags); 2441 ahd_set_syncrate(ahd, &devinfo, period, offset, 2442 ppr_options, AHD_TRANS_GOAL, FALSE); 2443 ahd_unlock(ahd, &flags); 2444 } 2445 2446 static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2447 { 2448 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2449 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2450 struct ahd_tmode_tstate *tstate; 2451 struct ahd_initiator_tinfo *tinfo 2452 = ahd_fetch_transinfo(ahd, 2453 starget->channel + 'A', 2454 shost->this_id, starget->id, &tstate); 2455 struct ahd_devinfo devinfo; 2456 unsigned int ppr_options = 0; 2457 unsigned int period = 0; 2458 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2459 unsigned long flags; 2460 2461 #ifdef AHD_DEBUG 2462 if ((ahd_debug & AHD_SHOW_DV) != 0) 2463 printk("%s: set offset to %d\n", ahd_name(ahd), offset); 2464 #endif 2465 2466 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2467 starget->channel + 'A', ROLE_INITIATOR); 2468 if (offset != 0) { 2469 period = tinfo->goal.period; 2470 ppr_options = tinfo->goal.ppr_options; 2471 ahd_find_syncrate(ahd, &period, &ppr_options, 2472 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2473 } 2474 2475 ahd_lock(ahd, &flags); 2476 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2477 AHD_TRANS_GOAL, FALSE); 2478 ahd_unlock(ahd, &flags); 2479 } 2480 2481 static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2482 { 2483 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2484 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2485 struct ahd_tmode_tstate *tstate; 2486 struct ahd_initiator_tinfo *tinfo 2487 = ahd_fetch_transinfo(ahd, 2488 starget->channel + 'A', 2489 shost->this_id, starget->id, &tstate); 2490 struct ahd_devinfo devinfo; 2491 unsigned int ppr_options = tinfo->goal.ppr_options 2492 & ~MSG_EXT_PPR_DT_REQ; 2493 unsigned int period = tinfo->goal.period; 2494 unsigned int width = tinfo->goal.width; 2495 unsigned long flags; 2496 2497 #ifdef AHD_DEBUG 2498 if ((ahd_debug & AHD_SHOW_DV) != 0) 2499 printk("%s: %s DT\n", ahd_name(ahd), 2500 dt ? "enabling" : "disabling"); 2501 #endif 2502 if (dt && spi_max_width(starget)) { 2503 ppr_options |= MSG_EXT_PPR_DT_REQ; 2504 if (!width) 2505 ahd_linux_set_width(starget, 1); 2506 } else { 2507 if (period <= 9) 2508 period = 10; /* If resetting DT, period must be >= 25ns */ 2509 /* IU is invalid without DT set */ 2510 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2511 } 2512 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2513 starget->channel + 'A', ROLE_INITIATOR); 2514 ahd_find_syncrate(ahd, &period, &ppr_options, 2515 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2516 2517 ahd_lock(ahd, &flags); 2518 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2519 ppr_options, AHD_TRANS_GOAL, FALSE); 2520 ahd_unlock(ahd, &flags); 2521 } 2522 2523 static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2524 { 2525 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2526 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2527 struct ahd_tmode_tstate *tstate; 2528 struct ahd_initiator_tinfo *tinfo 2529 = ahd_fetch_transinfo(ahd, 2530 starget->channel + 'A', 2531 shost->this_id, starget->id, &tstate); 2532 struct ahd_devinfo devinfo; 2533 unsigned int ppr_options = tinfo->goal.ppr_options 2534 & ~MSG_EXT_PPR_QAS_REQ; 2535 unsigned int period = tinfo->goal.period; 2536 unsigned int dt; 2537 unsigned long flags; 2538 2539 #ifdef AHD_DEBUG 2540 if ((ahd_debug & AHD_SHOW_DV) != 0) 2541 printk("%s: %s QAS\n", ahd_name(ahd), 2542 qas ? "enabling" : "disabling"); 2543 #endif 2544 2545 if (qas) { 2546 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2547 } 2548 2549 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2550 2551 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2552 starget->channel + 'A', ROLE_INITIATOR); 2553 ahd_find_syncrate(ahd, &period, &ppr_options, 2554 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2555 2556 ahd_lock(ahd, &flags); 2557 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2558 ppr_options, AHD_TRANS_GOAL, FALSE); 2559 ahd_unlock(ahd, &flags); 2560 } 2561 2562 static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 2563 { 2564 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2565 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2566 struct ahd_tmode_tstate *tstate; 2567 struct ahd_initiator_tinfo *tinfo 2568 = ahd_fetch_transinfo(ahd, 2569 starget->channel + 'A', 2570 shost->this_id, starget->id, &tstate); 2571 struct ahd_devinfo devinfo; 2572 unsigned int ppr_options = tinfo->goal.ppr_options 2573 & ~MSG_EXT_PPR_IU_REQ; 2574 unsigned int period = tinfo->goal.period; 2575 unsigned int dt; 2576 unsigned long flags; 2577 2578 #ifdef AHD_DEBUG 2579 if ((ahd_debug & AHD_SHOW_DV) != 0) 2580 printk("%s: %s IU\n", ahd_name(ahd), 2581 iu ? "enabling" : "disabling"); 2582 #endif 2583 2584 if (iu && spi_max_width(starget)) { 2585 ppr_options |= MSG_EXT_PPR_IU_REQ; 2586 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2587 } 2588 2589 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2590 2591 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2592 starget->channel + 'A', ROLE_INITIATOR); 2593 ahd_find_syncrate(ahd, &period, &ppr_options, 2594 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2595 2596 ahd_lock(ahd, &flags); 2597 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2598 ppr_options, AHD_TRANS_GOAL, FALSE); 2599 ahd_unlock(ahd, &flags); 2600 } 2601 2602 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2603 { 2604 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2605 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2606 struct ahd_tmode_tstate *tstate; 2607 struct ahd_initiator_tinfo *tinfo 2608 = ahd_fetch_transinfo(ahd, 2609 starget->channel + 'A', 2610 shost->this_id, starget->id, &tstate); 2611 struct ahd_devinfo devinfo; 2612 unsigned int ppr_options = tinfo->goal.ppr_options 2613 & ~MSG_EXT_PPR_RD_STRM; 2614 unsigned int period = tinfo->goal.period; 2615 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2616 unsigned long flags; 2617 2618 #ifdef AHD_DEBUG 2619 if ((ahd_debug & AHD_SHOW_DV) != 0) 2620 printk("%s: %s Read Streaming\n", ahd_name(ahd), 2621 rdstrm ? "enabling" : "disabling"); 2622 #endif 2623 2624 if (rdstrm && spi_max_width(starget)) 2625 ppr_options |= MSG_EXT_PPR_RD_STRM; 2626 2627 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2628 starget->channel + 'A', ROLE_INITIATOR); 2629 ahd_find_syncrate(ahd, &period, &ppr_options, 2630 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2631 2632 ahd_lock(ahd, &flags); 2633 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2634 ppr_options, AHD_TRANS_GOAL, FALSE); 2635 ahd_unlock(ahd, &flags); 2636 } 2637 2638 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2639 { 2640 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2641 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2642 struct ahd_tmode_tstate *tstate; 2643 struct ahd_initiator_tinfo *tinfo 2644 = ahd_fetch_transinfo(ahd, 2645 starget->channel + 'A', 2646 shost->this_id, starget->id, &tstate); 2647 struct ahd_devinfo devinfo; 2648 unsigned int ppr_options = tinfo->goal.ppr_options 2649 & ~MSG_EXT_PPR_WR_FLOW; 2650 unsigned int period = tinfo->goal.period; 2651 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2652 unsigned long flags; 2653 2654 #ifdef AHD_DEBUG 2655 if ((ahd_debug & AHD_SHOW_DV) != 0) 2656 printk("%s: %s Write Flow Control\n", ahd_name(ahd), 2657 wrflow ? "enabling" : "disabling"); 2658 #endif 2659 2660 if (wrflow && spi_max_width(starget)) 2661 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2662 2663 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2664 starget->channel + 'A', ROLE_INITIATOR); 2665 ahd_find_syncrate(ahd, &period, &ppr_options, 2666 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2667 2668 ahd_lock(ahd, &flags); 2669 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2670 ppr_options, AHD_TRANS_GOAL, FALSE); 2671 ahd_unlock(ahd, &flags); 2672 } 2673 2674 static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2675 { 2676 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2677 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2678 struct ahd_tmode_tstate *tstate; 2679 struct ahd_initiator_tinfo *tinfo 2680 = ahd_fetch_transinfo(ahd, 2681 starget->channel + 'A', 2682 shost->this_id, starget->id, &tstate); 2683 struct ahd_devinfo devinfo; 2684 unsigned int ppr_options = tinfo->goal.ppr_options 2685 & ~MSG_EXT_PPR_RTI; 2686 unsigned int period = tinfo->goal.period; 2687 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2688 unsigned long flags; 2689 2690 if ((ahd->features & AHD_RTI) == 0) { 2691 #ifdef AHD_DEBUG 2692 if ((ahd_debug & AHD_SHOW_DV) != 0) 2693 printk("%s: RTI not available\n", ahd_name(ahd)); 2694 #endif 2695 return; 2696 } 2697 2698 #ifdef AHD_DEBUG 2699 if ((ahd_debug & AHD_SHOW_DV) != 0) 2700 printk("%s: %s RTI\n", ahd_name(ahd), 2701 rti ? "enabling" : "disabling"); 2702 #endif 2703 2704 if (rti && spi_max_width(starget)) 2705 ppr_options |= MSG_EXT_PPR_RTI; 2706 2707 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2708 starget->channel + 'A', ROLE_INITIATOR); 2709 ahd_find_syncrate(ahd, &period, &ppr_options, 2710 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2711 2712 ahd_lock(ahd, &flags); 2713 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2714 ppr_options, AHD_TRANS_GOAL, FALSE); 2715 ahd_unlock(ahd, &flags); 2716 } 2717 2718 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2719 { 2720 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2721 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2722 struct ahd_tmode_tstate *tstate; 2723 struct ahd_initiator_tinfo *tinfo 2724 = ahd_fetch_transinfo(ahd, 2725 starget->channel + 'A', 2726 shost->this_id, starget->id, &tstate); 2727 struct ahd_devinfo devinfo; 2728 unsigned int ppr_options = tinfo->goal.ppr_options 2729 & ~MSG_EXT_PPR_PCOMP_EN; 2730 unsigned int period = tinfo->goal.period; 2731 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2732 unsigned long flags; 2733 2734 #ifdef AHD_DEBUG 2735 if ((ahd_debug & AHD_SHOW_DV) != 0) 2736 printk("%s: %s Precompensation\n", ahd_name(ahd), 2737 pcomp ? "Enable" : "Disable"); 2738 #endif 2739 2740 if (pcomp && spi_max_width(starget)) { 2741 uint8_t precomp; 2742 2743 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 2744 const struct ahd_linux_iocell_opts *iocell_opts; 2745 2746 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2747 precomp = iocell_opts->precomp; 2748 } else { 2749 precomp = AIC79XX_DEFAULT_PRECOMP; 2750 } 2751 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2752 AHD_SET_PRECOMP(ahd, precomp); 2753 } else { 2754 AHD_SET_PRECOMP(ahd, 0); 2755 } 2756 2757 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2758 starget->channel + 'A', ROLE_INITIATOR); 2759 ahd_find_syncrate(ahd, &period, &ppr_options, 2760 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2761 2762 ahd_lock(ahd, &flags); 2763 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2764 ppr_options, AHD_TRANS_GOAL, FALSE); 2765 ahd_unlock(ahd, &flags); 2766 } 2767 2768 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2769 { 2770 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2771 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2772 struct ahd_tmode_tstate *tstate; 2773 struct ahd_initiator_tinfo *tinfo 2774 = ahd_fetch_transinfo(ahd, 2775 starget->channel + 'A', 2776 shost->this_id, starget->id, &tstate); 2777 struct ahd_devinfo devinfo; 2778 unsigned int ppr_options = tinfo->goal.ppr_options 2779 & ~MSG_EXT_PPR_HOLD_MCS; 2780 unsigned int period = tinfo->goal.period; 2781 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2782 unsigned long flags; 2783 2784 if (hold && spi_max_width(starget)) 2785 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2786 2787 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2788 starget->channel + 'A', ROLE_INITIATOR); 2789 ahd_find_syncrate(ahd, &period, &ppr_options, 2790 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2791 2792 ahd_lock(ahd, &flags); 2793 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2794 ppr_options, AHD_TRANS_GOAL, FALSE); 2795 ahd_unlock(ahd, &flags); 2796 } 2797 2798 static void ahd_linux_get_signalling(struct Scsi_Host *shost) 2799 { 2800 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; 2801 unsigned long flags; 2802 u8 mode; 2803 2804 ahd_lock(ahd, &flags); 2805 ahd_pause(ahd); 2806 mode = ahd_inb(ahd, SBLKCTL); 2807 ahd_unpause(ahd); 2808 ahd_unlock(ahd, &flags); 2809 2810 if (mode & ENAB40) 2811 spi_signalling(shost) = SPI_SIGNAL_LVD; 2812 else if (mode & ENAB20) 2813 spi_signalling(shost) = SPI_SIGNAL_SE; 2814 else 2815 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2816 } 2817 2818 static struct spi_function_template ahd_linux_transport_functions = { 2819 .set_offset = ahd_linux_set_offset, 2820 .show_offset = 1, 2821 .set_period = ahd_linux_set_period, 2822 .show_period = 1, 2823 .set_width = ahd_linux_set_width, 2824 .show_width = 1, 2825 .set_dt = ahd_linux_set_dt, 2826 .show_dt = 1, 2827 .set_iu = ahd_linux_set_iu, 2828 .show_iu = 1, 2829 .set_qas = ahd_linux_set_qas, 2830 .show_qas = 1, 2831 .set_rd_strm = ahd_linux_set_rd_strm, 2832 .show_rd_strm = 1, 2833 .set_wr_flow = ahd_linux_set_wr_flow, 2834 .show_wr_flow = 1, 2835 .set_rti = ahd_linux_set_rti, 2836 .show_rti = 1, 2837 .set_pcomp_en = ahd_linux_set_pcomp_en, 2838 .show_pcomp_en = 1, 2839 .set_hold_mcs = ahd_linux_set_hold_mcs, 2840 .show_hold_mcs = 1, 2841 .get_signalling = ahd_linux_get_signalling, 2842 }; 2843 2844 static int __init 2845 ahd_linux_init(void) 2846 { 2847 int error = 0; 2848 2849 /* 2850 * If we've been passed any parameters, process them now. 2851 */ 2852 if (aic79xx) 2853 aic79xx_setup(aic79xx); 2854 2855 ahd_linux_transport_template = 2856 spi_attach_transport(&ahd_linux_transport_functions); 2857 if (!ahd_linux_transport_template) 2858 return -ENODEV; 2859 2860 scsi_transport_reserve_device(ahd_linux_transport_template, 2861 sizeof(struct ahd_linux_device)); 2862 2863 error = ahd_linux_pci_init(); 2864 if (error) 2865 spi_release_transport(ahd_linux_transport_template); 2866 return error; 2867 } 2868 2869 static void __exit 2870 ahd_linux_exit(void) 2871 { 2872 ahd_linux_pci_exit(); 2873 spi_release_transport(ahd_linux_transport_template); 2874 } 2875 2876 module_init(ahd_linux_init); 2877 module_exit(ahd_linux_exit); 2878