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 uint8_t *bh; 727 int heads; 728 int sectors; 729 int cylinders; 730 int ret; 731 int extended; 732 struct ahd_softc *ahd; 733 734 ahd = *((struct ahd_softc **)sdev->host->hostdata); 735 736 bh = scsi_bios_ptable(bdev); 737 if (bh) { 738 ret = scsi_partsize(bh, capacity, 739 &geom[2], &geom[0], &geom[1]); 740 kfree(bh); 741 if (ret != -1) 742 return (ret); 743 } 744 heads = 64; 745 sectors = 32; 746 cylinders = aic_sector_div(capacity, heads, sectors); 747 748 if (aic79xx_extended != 0) 749 extended = 1; 750 else 751 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 752 if (extended && cylinders >= 1024) { 753 heads = 255; 754 sectors = 63; 755 cylinders = aic_sector_div(capacity, heads, sectors); 756 } 757 geom[0] = heads; 758 geom[1] = sectors; 759 geom[2] = cylinders; 760 return (0); 761 } 762 #endif 763 764 /* 765 * Abort the current SCSI command(s). 766 */ 767 static int 768 ahd_linux_abort(struct scsi_cmnd *cmd) 769 { 770 int error; 771 772 error = ahd_linux_queue_abort_cmd(cmd); 773 774 return error; 775 } 776 777 /* 778 * Attempt to send a target reset message to the device that timed out. 779 */ 780 static int 781 ahd_linux_dev_reset(struct scsi_cmnd *cmd) 782 { 783 struct ahd_softc *ahd; 784 struct ahd_linux_device *dev; 785 struct scb *reset_scb; 786 u_int cdb_byte; 787 int retval = SUCCESS; 788 int paused; 789 int wait; 790 struct ahd_initiator_tinfo *tinfo; 791 struct ahd_tmode_tstate *tstate; 792 unsigned long flags; 793 DECLARE_COMPLETION_ONSTACK(done); 794 795 reset_scb = NULL; 796 paused = FALSE; 797 wait = FALSE; 798 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 799 800 scmd_printk(KERN_INFO, cmd, 801 "Attempting to queue a TARGET RESET message:"); 802 803 printk("CDB:"); 804 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 805 printk(" 0x%x", cmd->cmnd[cdb_byte]); 806 printk("\n"); 807 808 /* 809 * Determine if we currently own this command. 810 */ 811 dev = scsi_transport_device_data(cmd->device); 812 813 if (dev == NULL) { 814 /* 815 * No target device for this command exists, 816 * so we must not still own the command. 817 */ 818 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 819 return SUCCESS; 820 } 821 822 /* 823 * Generate us a new SCB 824 */ 825 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); 826 if (!reset_scb) { 827 scmd_printk(KERN_INFO, cmd, "No SCB available\n"); 828 return FAILED; 829 } 830 831 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 832 cmd->device->id, &tstate); 833 reset_scb->io_ctx = cmd; 834 reset_scb->platform_data->dev = dev; 835 reset_scb->sg_count = 0; 836 ahd_set_residual(reset_scb, 0); 837 ahd_set_sense_residual(reset_scb, 0); 838 reset_scb->platform_data->xfer_len = 0; 839 reset_scb->hscb->control = 0; 840 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd); 841 reset_scb->hscb->lun = cmd->device->lun; 842 reset_scb->hscb->cdb_len = 0; 843 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; 844 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; 845 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 846 reset_scb->flags |= SCB_PACKETIZED; 847 } else { 848 reset_scb->hscb->control |= MK_MESSAGE; 849 } 850 dev->openings--; 851 dev->active++; 852 dev->commands_issued++; 853 854 ahd_lock(ahd, &flags); 855 856 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); 857 ahd_queue_scb(ahd, reset_scb); 858 859 ahd->platform_data->eh_done = &done; 860 ahd_unlock(ahd, &flags); 861 862 printk("%s: Device reset code sleeping\n", ahd_name(ahd)); 863 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 864 ahd_lock(ahd, &flags); 865 ahd->platform_data->eh_done = NULL; 866 ahd_unlock(ahd, &flags); 867 printk("%s: Device reset timer expired (active %d)\n", 868 ahd_name(ahd), dev->active); 869 retval = FAILED; 870 } 871 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); 872 873 return (retval); 874 } 875 876 /* 877 * Reset the SCSI bus. 878 */ 879 static int 880 ahd_linux_bus_reset(struct scsi_cmnd *cmd) 881 { 882 struct ahd_softc *ahd; 883 int found; 884 unsigned long flags; 885 886 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 887 #ifdef AHD_DEBUG 888 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 889 printk("%s: Bus reset called for cmd %p\n", 890 ahd_name(ahd), cmd); 891 #endif 892 ahd_lock(ahd, &flags); 893 894 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 895 /*initiate reset*/TRUE); 896 ahd_unlock(ahd, &flags); 897 898 if (bootverbose) 899 printk("%s: SCSI bus reset delivered. " 900 "%d SCBs aborted.\n", ahd_name(ahd), found); 901 902 return (SUCCESS); 903 } 904 905 struct scsi_host_template aic79xx_driver_template = { 906 .module = THIS_MODULE, 907 .name = "aic79xx", 908 .proc_name = "aic79xx", 909 .show_info = ahd_linux_show_info, 910 .write_info = ahd_proc_write_seeprom, 911 .info = ahd_linux_info, 912 .queuecommand = ahd_linux_queue, 913 .eh_abort_handler = ahd_linux_abort, 914 .eh_device_reset_handler = ahd_linux_dev_reset, 915 .eh_bus_reset_handler = ahd_linux_bus_reset, 916 #if defined(__i386__) 917 .bios_param = ahd_linux_biosparam, 918 #endif 919 .can_queue = AHD_MAX_QUEUE, 920 .this_id = -1, 921 .max_sectors = 8192, 922 .cmd_per_lun = 2, 923 .use_clustering = ENABLE_CLUSTERING, 924 .slave_alloc = ahd_linux_slave_alloc, 925 .slave_configure = ahd_linux_slave_configure, 926 .target_alloc = ahd_linux_target_alloc, 927 .target_destroy = ahd_linux_target_destroy, 928 .use_blk_tags = 1, 929 }; 930 931 /******************************** Bus DMA *************************************/ 932 int 933 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 934 bus_size_t alignment, bus_size_t boundary, 935 dma_addr_t lowaddr, dma_addr_t highaddr, 936 bus_dma_filter_t *filter, void *filterarg, 937 bus_size_t maxsize, int nsegments, 938 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 939 { 940 bus_dma_tag_t dmat; 941 942 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 943 if (dmat == NULL) 944 return (ENOMEM); 945 946 /* 947 * Linux is very simplistic about DMA memory. For now don't 948 * maintain all specification information. Once Linux supplies 949 * better facilities for doing these operations, or the 950 * needs of this particular driver change, we might need to do 951 * more here. 952 */ 953 dmat->alignment = alignment; 954 dmat->boundary = boundary; 955 dmat->maxsize = maxsize; 956 *ret_tag = dmat; 957 return (0); 958 } 959 960 void 961 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 962 { 963 kfree(dmat); 964 } 965 966 int 967 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 968 int flags, bus_dmamap_t *mapp) 969 { 970 *vaddr = pci_alloc_consistent(ahd->dev_softc, 971 dmat->maxsize, mapp); 972 if (*vaddr == NULL) 973 return (ENOMEM); 974 return(0); 975 } 976 977 void 978 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 979 void* vaddr, bus_dmamap_t map) 980 { 981 pci_free_consistent(ahd->dev_softc, dmat->maxsize, 982 vaddr, map); 983 } 984 985 int 986 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 987 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 988 void *cb_arg, int flags) 989 { 990 /* 991 * Assume for now that this will only be used during 992 * initialization and not for per-transaction buffer mapping. 993 */ 994 bus_dma_segment_t stack_sg; 995 996 stack_sg.ds_addr = map; 997 stack_sg.ds_len = dmat->maxsize; 998 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 999 return (0); 1000 } 1001 1002 void 1003 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 1004 { 1005 } 1006 1007 int 1008 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 1009 { 1010 /* Nothing to do */ 1011 return (0); 1012 } 1013 1014 /********************* Platform Dependent Functions ***************************/ 1015 static void 1016 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 1017 { 1018 1019 if ((instance >= 0) 1020 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { 1021 uint8_t *iocell_info; 1022 1023 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 1024 iocell_info[index] = value & 0xFFFF; 1025 if (bootverbose) 1026 printk("iocell[%d:%ld] = %d\n", instance, index, value); 1027 } 1028 } 1029 1030 static void 1031 ahd_linux_setup_tag_info_global(char *p) 1032 { 1033 int tags, i, j; 1034 1035 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 1036 printk("Setting Global Tags= %d\n", tags); 1037 1038 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { 1039 for (j = 0; j < AHD_NUM_TARGETS; j++) { 1040 aic79xx_tag_info[i].tag_commands[j] = tags; 1041 } 1042 } 1043 } 1044 1045 static void 1046 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 1047 { 1048 1049 if ((instance >= 0) && (targ >= 0) 1050 && (instance < ARRAY_SIZE(aic79xx_tag_info)) 1051 && (targ < AHD_NUM_TARGETS)) { 1052 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 1053 if (bootverbose) 1054 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 1055 } 1056 } 1057 1058 static char * 1059 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 1060 void (*callback)(u_long, int, int, int32_t), 1061 u_long callback_arg) 1062 { 1063 char *tok_end; 1064 char *tok_end2; 1065 int i; 1066 int instance; 1067 int targ; 1068 int done; 1069 char tok_list[] = {'.', ',', '{', '}', '\0'}; 1070 1071 /* All options use a ':' name/arg separator */ 1072 if (*opt_arg != ':') 1073 return (opt_arg); 1074 opt_arg++; 1075 instance = -1; 1076 targ = -1; 1077 done = FALSE; 1078 /* 1079 * Restore separator that may be in 1080 * the middle of our option argument. 1081 */ 1082 tok_end = strchr(opt_arg, '\0'); 1083 if (tok_end < end) 1084 *tok_end = ','; 1085 while (!done) { 1086 switch (*opt_arg) { 1087 case '{': 1088 if (instance == -1) { 1089 instance = 0; 1090 } else { 1091 if (depth > 1) { 1092 if (targ == -1) 1093 targ = 0; 1094 } else { 1095 printk("Malformed Option %s\n", 1096 opt_name); 1097 done = TRUE; 1098 } 1099 } 1100 opt_arg++; 1101 break; 1102 case '}': 1103 if (targ != -1) 1104 targ = -1; 1105 else if (instance != -1) 1106 instance = -1; 1107 opt_arg++; 1108 break; 1109 case ',': 1110 case '.': 1111 if (instance == -1) 1112 done = TRUE; 1113 else if (targ >= 0) 1114 targ++; 1115 else if (instance >= 0) 1116 instance++; 1117 opt_arg++; 1118 break; 1119 case '\0': 1120 done = TRUE; 1121 break; 1122 default: 1123 tok_end = end; 1124 for (i = 0; tok_list[i]; i++) { 1125 tok_end2 = strchr(opt_arg, tok_list[i]); 1126 if ((tok_end2) && (tok_end2 < tok_end)) 1127 tok_end = tok_end2; 1128 } 1129 callback(callback_arg, instance, targ, 1130 simple_strtol(opt_arg, NULL, 0)); 1131 opt_arg = tok_end; 1132 break; 1133 } 1134 } 1135 return (opt_arg); 1136 } 1137 1138 /* 1139 * Handle Linux boot parameters. This routine allows for assigning a value 1140 * to a parameter with a ':' between the parameter and the value. 1141 * ie. aic79xx=stpwlev:1,extended 1142 */ 1143 static int 1144 aic79xx_setup(char *s) 1145 { 1146 int i, n; 1147 char *p; 1148 char *end; 1149 1150 static const struct { 1151 const char *name; 1152 uint32_t *flag; 1153 } options[] = { 1154 { "extended", &aic79xx_extended }, 1155 { "no_reset", &aic79xx_no_reset }, 1156 { "verbose", &aic79xx_verbose }, 1157 { "allow_memio", &aic79xx_allow_memio}, 1158 #ifdef AHD_DEBUG 1159 { "debug", &ahd_debug }, 1160 #endif 1161 { "periodic_otag", &aic79xx_periodic_otag }, 1162 { "pci_parity", &aic79xx_pci_parity }, 1163 { "seltime", &aic79xx_seltime }, 1164 { "tag_info", NULL }, 1165 { "global_tag_depth", NULL}, 1166 { "slewrate", NULL }, 1167 { "precomp", NULL }, 1168 { "amplitude", NULL }, 1169 { "slowcrc", &aic79xx_slowcrc }, 1170 }; 1171 1172 end = strchr(s, '\0'); 1173 1174 /* 1175 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1176 * will never be 0 in this case. 1177 */ 1178 n = 0; 1179 1180 while ((p = strsep(&s, ",.")) != NULL) { 1181 if (*p == '\0') 1182 continue; 1183 for (i = 0; i < ARRAY_SIZE(options); i++) { 1184 1185 n = strlen(options[i].name); 1186 if (strncmp(options[i].name, p, n) == 0) 1187 break; 1188 } 1189 if (i == ARRAY_SIZE(options)) 1190 continue; 1191 1192 if (strncmp(p, "global_tag_depth", n) == 0) { 1193 ahd_linux_setup_tag_info_global(p + n); 1194 } else if (strncmp(p, "tag_info", n) == 0) { 1195 s = ahd_parse_brace_option("tag_info", p + n, end, 1196 2, ahd_linux_setup_tag_info, 0); 1197 } else if (strncmp(p, "slewrate", n) == 0) { 1198 s = ahd_parse_brace_option("slewrate", 1199 p + n, end, 1, ahd_linux_setup_iocell_info, 1200 AIC79XX_SLEWRATE_INDEX); 1201 } else if (strncmp(p, "precomp", n) == 0) { 1202 s = ahd_parse_brace_option("precomp", 1203 p + n, end, 1, ahd_linux_setup_iocell_info, 1204 AIC79XX_PRECOMP_INDEX); 1205 } else if (strncmp(p, "amplitude", n) == 0) { 1206 s = ahd_parse_brace_option("amplitude", 1207 p + n, end, 1, ahd_linux_setup_iocell_info, 1208 AIC79XX_AMPLITUDE_INDEX); 1209 } else if (p[n] == ':') { 1210 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1211 } else if (!strncmp(p, "verbose", n)) { 1212 *(options[i].flag) = 1; 1213 } else { 1214 *(options[i].flag) ^= 0xFFFFFFFF; 1215 } 1216 } 1217 return 1; 1218 } 1219 1220 __setup("aic79xx=", aic79xx_setup); 1221 1222 uint32_t aic79xx_verbose; 1223 1224 int 1225 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1226 { 1227 char buf[80]; 1228 struct Scsi_Host *host; 1229 char *new_name; 1230 u_long s; 1231 int retval; 1232 1233 template->name = ahd->description; 1234 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1235 if (host == NULL) 1236 return (ENOMEM); 1237 1238 *((struct ahd_softc **)host->hostdata) = ahd; 1239 ahd->platform_data->host = host; 1240 host->can_queue = AHD_MAX_QUEUE; 1241 host->cmd_per_lun = 2; 1242 host->sg_tablesize = AHD_NSEG; 1243 host->this_id = ahd->our_id; 1244 host->irq = ahd->platform_data->irq; 1245 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1246 host->max_lun = AHD_NUM_LUNS; 1247 host->max_channel = 0; 1248 host->sg_tablesize = AHD_NSEG; 1249 ahd_lock(ahd, &s); 1250 ahd_set_unit(ahd, ahd_linux_unit++); 1251 ahd_unlock(ahd, &s); 1252 sprintf(buf, "scsi%d", host->host_no); 1253 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1254 if (new_name != NULL) { 1255 strcpy(new_name, buf); 1256 ahd_set_name(ahd, new_name); 1257 } 1258 host->unique_id = ahd->unit; 1259 ahd_linux_initialize_scsi_bus(ahd); 1260 ahd_intr_enable(ahd, TRUE); 1261 1262 host->transportt = ahd_linux_transport_template; 1263 1264 retval = scsi_add_host(host, &ahd->dev_softc->dev); 1265 if (retval) { 1266 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); 1267 scsi_host_put(host); 1268 return retval; 1269 } 1270 1271 scsi_scan_host(host); 1272 return 0; 1273 } 1274 1275 /* 1276 * Place the SCSI bus into a known state by either resetting it, 1277 * or forcing transfer negotiations on the next command to any 1278 * target. 1279 */ 1280 static void 1281 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1282 { 1283 u_int target_id; 1284 u_int numtarg; 1285 unsigned long s; 1286 1287 target_id = 0; 1288 numtarg = 0; 1289 1290 if (aic79xx_no_reset != 0) 1291 ahd->flags &= ~AHD_RESET_BUS_A; 1292 1293 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1294 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1295 else 1296 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1297 1298 ahd_lock(ahd, &s); 1299 1300 /* 1301 * Force negotiation to async for all targets that 1302 * will not see an initial bus reset. 1303 */ 1304 for (; target_id < numtarg; target_id++) { 1305 struct ahd_devinfo devinfo; 1306 struct ahd_initiator_tinfo *tinfo; 1307 struct ahd_tmode_tstate *tstate; 1308 1309 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1310 target_id, &tstate); 1311 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1312 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1313 ahd_update_neg_request(ahd, &devinfo, tstate, 1314 tinfo, AHD_NEG_ALWAYS); 1315 } 1316 ahd_unlock(ahd, &s); 1317 /* Give the bus some time to recover */ 1318 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1319 ahd_freeze_simq(ahd); 1320 msleep(AIC79XX_RESET_DELAY); 1321 ahd_release_simq(ahd); 1322 } 1323 } 1324 1325 int 1326 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1327 { 1328 ahd->platform_data = 1329 kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC); 1330 if (ahd->platform_data == NULL) 1331 return (ENOMEM); 1332 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1333 ahd_lockinit(ahd); 1334 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1335 return (0); 1336 } 1337 1338 void 1339 ahd_platform_free(struct ahd_softc *ahd) 1340 { 1341 struct scsi_target *starget; 1342 int i; 1343 1344 if (ahd->platform_data != NULL) { 1345 /* destroy all of the device and target objects */ 1346 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1347 starget = ahd->platform_data->starget[i]; 1348 if (starget != NULL) { 1349 ahd->platform_data->starget[i] = NULL; 1350 } 1351 } 1352 1353 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1354 free_irq(ahd->platform_data->irq, ahd); 1355 if (ahd->tags[0] == BUS_SPACE_PIO 1356 && ahd->bshs[0].ioport != 0) 1357 release_region(ahd->bshs[0].ioport, 256); 1358 if (ahd->tags[1] == BUS_SPACE_PIO 1359 && ahd->bshs[1].ioport != 0) 1360 release_region(ahd->bshs[1].ioport, 256); 1361 if (ahd->tags[0] == BUS_SPACE_MEMIO 1362 && ahd->bshs[0].maddr != NULL) { 1363 iounmap(ahd->bshs[0].maddr); 1364 release_mem_region(ahd->platform_data->mem_busaddr, 1365 0x1000); 1366 } 1367 if (ahd->platform_data->host) 1368 scsi_host_put(ahd->platform_data->host); 1369 1370 kfree(ahd->platform_data); 1371 } 1372 } 1373 1374 void 1375 ahd_platform_init(struct ahd_softc *ahd) 1376 { 1377 /* 1378 * Lookup and commit any modified IO Cell options. 1379 */ 1380 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 1381 const struct ahd_linux_iocell_opts *iocell_opts; 1382 1383 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1384 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1385 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1386 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1387 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1388 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1389 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1390 } 1391 1392 } 1393 1394 void 1395 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1396 { 1397 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1398 SCB_GET_CHANNEL(ahd, scb), 1399 SCB_GET_LUN(scb), SCB_LIST_NULL, 1400 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1401 } 1402 1403 void 1404 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev, 1405 struct ahd_devinfo *devinfo, ahd_queue_alg alg) 1406 { 1407 struct ahd_linux_device *dev; 1408 int was_queuing; 1409 int now_queuing; 1410 1411 if (sdev == NULL) 1412 return; 1413 1414 dev = scsi_transport_device_data(sdev); 1415 1416 if (dev == NULL) 1417 return; 1418 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1419 switch (alg) { 1420 default: 1421 case AHD_QUEUE_NONE: 1422 now_queuing = 0; 1423 break; 1424 case AHD_QUEUE_BASIC: 1425 now_queuing = AHD_DEV_Q_BASIC; 1426 break; 1427 case AHD_QUEUE_TAGGED: 1428 now_queuing = AHD_DEV_Q_TAGGED; 1429 break; 1430 } 1431 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1432 && (was_queuing != now_queuing) 1433 && (dev->active != 0)) { 1434 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1435 dev->qfrozen++; 1436 } 1437 1438 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1439 if (now_queuing) { 1440 u_int usertags; 1441 1442 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1443 if (!was_queuing) { 1444 /* 1445 * Start out aggressively and allow our 1446 * dynamic queue depth algorithm to take 1447 * care of the rest. 1448 */ 1449 dev->maxtags = usertags; 1450 dev->openings = dev->maxtags - dev->active; 1451 } 1452 if (dev->maxtags == 0) { 1453 /* 1454 * Queueing is disabled by the user. 1455 */ 1456 dev->openings = 1; 1457 } else if (alg == AHD_QUEUE_TAGGED) { 1458 dev->flags |= AHD_DEV_Q_TAGGED; 1459 if (aic79xx_periodic_otag != 0) 1460 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1461 } else 1462 dev->flags |= AHD_DEV_Q_BASIC; 1463 } else { 1464 /* We can only have one opening. */ 1465 dev->maxtags = 0; 1466 dev->openings = 1 - dev->active; 1467 } 1468 1469 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1470 case AHD_DEV_Q_BASIC: 1471 case AHD_DEV_Q_TAGGED: 1472 scsi_change_queue_depth(sdev, 1473 dev->openings + dev->active); 1474 break; 1475 default: 1476 /* 1477 * We allow the OS to queue 2 untagged transactions to 1478 * us at any time even though we can only execute them 1479 * serially on the controller/device. This should 1480 * remove some latency. 1481 */ 1482 scsi_change_queue_depth(sdev, 1); 1483 break; 1484 } 1485 } 1486 1487 int 1488 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1489 int lun, u_int tag, role_t role, uint32_t status) 1490 { 1491 return 0; 1492 } 1493 1494 static u_int 1495 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1496 { 1497 static int warned_user; 1498 u_int tags; 1499 1500 tags = 0; 1501 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1502 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { 1503 1504 if (warned_user == 0) { 1505 printk(KERN_WARNING 1506 "aic79xx: WARNING: Insufficient tag_info instances\n" 1507 "aic79xx: for installed controllers. Using defaults\n" 1508 "aic79xx: Please update the aic79xx_tag_info array in\n" 1509 "aic79xx: the aic79xx_osm.c source file.\n"); 1510 warned_user++; 1511 } 1512 tags = AHD_MAX_QUEUE; 1513 } else { 1514 adapter_tag_info_t *tag_info; 1515 1516 tag_info = &aic79xx_tag_info[ahd->unit]; 1517 tags = tag_info->tag_commands[devinfo->target_offset]; 1518 if (tags > AHD_MAX_QUEUE) 1519 tags = AHD_MAX_QUEUE; 1520 } 1521 } 1522 return (tags); 1523 } 1524 1525 /* 1526 * Determines the queue depth for a given device. 1527 */ 1528 static void 1529 ahd_linux_device_queue_depth(struct scsi_device *sdev) 1530 { 1531 struct ahd_devinfo devinfo; 1532 u_int tags; 1533 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1534 1535 ahd_compile_devinfo(&devinfo, 1536 ahd->our_id, 1537 sdev->sdev_target->id, sdev->lun, 1538 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1539 ROLE_INITIATOR); 1540 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1541 if (tags != 0 && sdev->tagged_supported != 0) { 1542 1543 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); 1544 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1545 devinfo.lun, AC_TRANSFER_NEG); 1546 ahd_print_devinfo(ahd, &devinfo); 1547 printk("Tagged Queuing enabled. Depth %d\n", tags); 1548 } else { 1549 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); 1550 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1551 devinfo.lun, AC_TRANSFER_NEG); 1552 } 1553 } 1554 1555 static int 1556 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1557 struct scsi_cmnd *cmd) 1558 { 1559 struct scb *scb; 1560 struct hardware_scb *hscb; 1561 struct ahd_initiator_tinfo *tinfo; 1562 struct ahd_tmode_tstate *tstate; 1563 u_int col_idx; 1564 uint16_t mask; 1565 unsigned long flags; 1566 int nseg; 1567 1568 nseg = scsi_dma_map(cmd); 1569 if (nseg < 0) 1570 return SCSI_MLQUEUE_HOST_BUSY; 1571 1572 ahd_lock(ahd, &flags); 1573 1574 /* 1575 * Get an scb to use. 1576 */ 1577 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1578 cmd->device->id, &tstate); 1579 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1580 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1581 col_idx = AHD_NEVER_COL_IDX; 1582 } else { 1583 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1584 cmd->device->lun); 1585 } 1586 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1587 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1588 ahd_unlock(ahd, &flags); 1589 scsi_dma_unmap(cmd); 1590 return SCSI_MLQUEUE_HOST_BUSY; 1591 } 1592 1593 scb->io_ctx = cmd; 1594 scb->platform_data->dev = dev; 1595 hscb = scb->hscb; 1596 cmd->host_scribble = (char *)scb; 1597 1598 /* 1599 * Fill out basics of the HSCB. 1600 */ 1601 hscb->control = 0; 1602 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1603 hscb->lun = cmd->device->lun; 1604 scb->hscb->task_management = 0; 1605 mask = SCB_GET_TARGET_MASK(ahd, scb); 1606 1607 if ((ahd->user_discenable & mask) != 0) 1608 hscb->control |= DISCENB; 1609 1610 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1611 scb->flags |= SCB_PACKETIZED; 1612 1613 if ((tstate->auto_negotiate & mask) != 0) { 1614 scb->flags |= SCB_AUTO_NEGOTIATE; 1615 scb->hscb->control |= MK_MESSAGE; 1616 } 1617 1618 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1619 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1620 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1621 hscb->control |= MSG_ORDERED_TASK; 1622 dev->commands_since_idle_or_otag = 0; 1623 } else { 1624 hscb->control |= MSG_SIMPLE_TASK; 1625 } 1626 } 1627 1628 hscb->cdb_len = cmd->cmd_len; 1629 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1630 1631 scb->platform_data->xfer_len = 0; 1632 ahd_set_residual(scb, 0); 1633 ahd_set_sense_residual(scb, 0); 1634 scb->sg_count = 0; 1635 1636 if (nseg > 0) { 1637 void *sg = scb->sg_list; 1638 struct scatterlist *cur_seg; 1639 int i; 1640 1641 scb->platform_data->xfer_len = 0; 1642 1643 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1644 dma_addr_t addr; 1645 bus_size_t len; 1646 1647 addr = sg_dma_address(cur_seg); 1648 len = sg_dma_len(cur_seg); 1649 scb->platform_data->xfer_len += len; 1650 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1651 i == (nseg - 1)); 1652 } 1653 } 1654 1655 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1656 dev->openings--; 1657 dev->active++; 1658 dev->commands_issued++; 1659 1660 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1661 dev->commands_since_idle_or_otag++; 1662 scb->flags |= SCB_ACTIVE; 1663 ahd_queue_scb(ahd, scb); 1664 1665 ahd_unlock(ahd, &flags); 1666 1667 return 0; 1668 } 1669 1670 /* 1671 * SCSI controller interrupt handler. 1672 */ 1673 irqreturn_t 1674 ahd_linux_isr(int irq, void *dev_id) 1675 { 1676 struct ahd_softc *ahd; 1677 u_long flags; 1678 int ours; 1679 1680 ahd = (struct ahd_softc *) dev_id; 1681 ahd_lock(ahd, &flags); 1682 ours = ahd_intr(ahd); 1683 ahd_unlock(ahd, &flags); 1684 return IRQ_RETVAL(ours); 1685 } 1686 1687 void 1688 ahd_send_async(struct ahd_softc *ahd, char channel, 1689 u_int target, u_int lun, ac_code code) 1690 { 1691 switch (code) { 1692 case AC_TRANSFER_NEG: 1693 { 1694 struct scsi_target *starget; 1695 struct ahd_initiator_tinfo *tinfo; 1696 struct ahd_tmode_tstate *tstate; 1697 unsigned int target_ppr_options; 1698 1699 BUG_ON(target == CAM_TARGET_WILDCARD); 1700 1701 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1702 target, &tstate); 1703 1704 /* 1705 * Don't bother reporting results while 1706 * negotiations are still pending. 1707 */ 1708 if (tinfo->curr.period != tinfo->goal.period 1709 || tinfo->curr.width != tinfo->goal.width 1710 || tinfo->curr.offset != tinfo->goal.offset 1711 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1712 if (bootverbose == 0) 1713 break; 1714 1715 /* 1716 * Don't bother reporting results that 1717 * are identical to those last reported. 1718 */ 1719 starget = ahd->platform_data->starget[target]; 1720 if (starget == NULL) 1721 break; 1722 1723 target_ppr_options = 1724 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1725 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1726 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1727 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1728 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1729 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1730 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1731 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1732 1733 if (tinfo->curr.period == spi_period(starget) 1734 && tinfo->curr.width == spi_width(starget) 1735 && tinfo->curr.offset == spi_offset(starget) 1736 && tinfo->curr.ppr_options == target_ppr_options) 1737 if (bootverbose == 0) 1738 break; 1739 1740 spi_period(starget) = tinfo->curr.period; 1741 spi_width(starget) = tinfo->curr.width; 1742 spi_offset(starget) = tinfo->curr.offset; 1743 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1744 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1745 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1746 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1747 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1748 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1749 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1750 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1751 spi_display_xfer_agreement(starget); 1752 break; 1753 } 1754 case AC_SENT_BDR: 1755 { 1756 WARN_ON(lun != CAM_LUN_WILDCARD); 1757 scsi_report_device_reset(ahd->platform_data->host, 1758 channel - 'A', target); 1759 break; 1760 } 1761 case AC_BUS_RESET: 1762 if (ahd->platform_data->host != NULL) { 1763 scsi_report_bus_reset(ahd->platform_data->host, 1764 channel - 'A'); 1765 } 1766 break; 1767 default: 1768 panic("ahd_send_async: Unexpected async event"); 1769 } 1770 } 1771 1772 /* 1773 * Calls the higher level scsi done function and frees the scb. 1774 */ 1775 void 1776 ahd_done(struct ahd_softc *ahd, struct scb *scb) 1777 { 1778 struct scsi_cmnd *cmd; 1779 struct ahd_linux_device *dev; 1780 1781 if ((scb->flags & SCB_ACTIVE) == 0) { 1782 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1783 ahd_dump_card_state(ahd); 1784 panic("Stopping for safety"); 1785 } 1786 LIST_REMOVE(scb, pending_links); 1787 cmd = scb->io_ctx; 1788 dev = scb->platform_data->dev; 1789 dev->active--; 1790 dev->openings++; 1791 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1792 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1793 dev->qfrozen--; 1794 } 1795 ahd_linux_unmap_scb(ahd, scb); 1796 1797 /* 1798 * Guard against stale sense data. 1799 * The Linux mid-layer assumes that sense 1800 * was retrieved anytime the first byte of 1801 * the sense buffer looks "sane". 1802 */ 1803 cmd->sense_buffer[0] = 0; 1804 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1805 uint32_t amount_xferred; 1806 1807 amount_xferred = 1808 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1809 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1810 #ifdef AHD_DEBUG 1811 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1812 ahd_print_path(ahd, scb); 1813 printk("Set CAM_UNCOR_PARITY\n"); 1814 } 1815 #endif 1816 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1817 #ifdef AHD_REPORT_UNDERFLOWS 1818 /* 1819 * This code is disabled by default as some 1820 * clients of the SCSI system do not properly 1821 * initialize the underflow parameter. This 1822 * results in spurious termination of commands 1823 * that complete as expected (e.g. underflow is 1824 * allowed as command can return variable amounts 1825 * of data. 1826 */ 1827 } else if (amount_xferred < scb->io_ctx->underflow) { 1828 u_int i; 1829 1830 ahd_print_path(ahd, scb); 1831 printk("CDB:"); 1832 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1833 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1834 printk("\n"); 1835 ahd_print_path(ahd, scb); 1836 printk("Saw underflow (%ld of %ld bytes). " 1837 "Treated as error\n", 1838 ahd_get_residual(scb), 1839 ahd_get_transfer_length(scb)); 1840 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1841 #endif 1842 } else { 1843 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1844 } 1845 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1846 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1847 } 1848 1849 if (dev->openings == 1 1850 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1851 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1852 dev->tag_success_count++; 1853 /* 1854 * Some devices deal with temporary internal resource 1855 * shortages by returning queue full. When the queue 1856 * full occurrs, we throttle back. Slowly try to get 1857 * back to our previous queue depth. 1858 */ 1859 if ((dev->openings + dev->active) < dev->maxtags 1860 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1861 dev->tag_success_count = 0; 1862 dev->openings++; 1863 } 1864 1865 if (dev->active == 0) 1866 dev->commands_since_idle_or_otag = 0; 1867 1868 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1869 printk("Recovery SCB completes\n"); 1870 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1871 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1872 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1873 1874 if (ahd->platform_data->eh_done) 1875 complete(ahd->platform_data->eh_done); 1876 } 1877 1878 ahd_free_scb(ahd, scb); 1879 ahd_linux_queue_cmd_complete(ahd, cmd); 1880 } 1881 1882 static void 1883 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1884 struct scsi_device *sdev, struct scb *scb) 1885 { 1886 struct ahd_devinfo devinfo; 1887 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1888 1889 ahd_compile_devinfo(&devinfo, 1890 ahd->our_id, 1891 sdev->sdev_target->id, sdev->lun, 1892 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1893 ROLE_INITIATOR); 1894 1895 /* 1896 * We don't currently trust the mid-layer to 1897 * properly deal with queue full or busy. So, 1898 * when one occurs, we tell the mid-layer to 1899 * unconditionally requeue the command to us 1900 * so that we can retry it ourselves. We also 1901 * implement our own throttling mechanism so 1902 * we don't clobber the device with too many 1903 * commands. 1904 */ 1905 switch (ahd_get_scsi_status(scb)) { 1906 default: 1907 break; 1908 case SCSI_STATUS_CHECK_COND: 1909 case SCSI_STATUS_CMD_TERMINATED: 1910 { 1911 struct scsi_cmnd *cmd; 1912 1913 /* 1914 * Copy sense information to the OS's cmd 1915 * structure if it is available. 1916 */ 1917 cmd = scb->io_ctx; 1918 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1919 struct scsi_status_iu_header *siu; 1920 u_int sense_size; 1921 u_int sense_offset; 1922 1923 if (scb->flags & SCB_SENSE) { 1924 sense_size = min(sizeof(struct scsi_sense_data) 1925 - ahd_get_sense_residual(scb), 1926 (u_long)SCSI_SENSE_BUFFERSIZE); 1927 sense_offset = 0; 1928 } else { 1929 /* 1930 * Copy only the sense data into the provided 1931 * buffer. 1932 */ 1933 siu = (struct scsi_status_iu_header *) 1934 scb->sense_data; 1935 sense_size = min_t(size_t, 1936 scsi_4btoul(siu->sense_length), 1937 SCSI_SENSE_BUFFERSIZE); 1938 sense_offset = SIU_SENSE_OFFSET(siu); 1939 } 1940 1941 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1942 memcpy(cmd->sense_buffer, 1943 ahd_get_sense_buf(ahd, scb) 1944 + sense_offset, sense_size); 1945 cmd->result |= (DRIVER_SENSE << 24); 1946 1947 #ifdef AHD_DEBUG 1948 if (ahd_debug & AHD_SHOW_SENSE) { 1949 int i; 1950 1951 printk("Copied %d bytes of sense data at %d:", 1952 sense_size, sense_offset); 1953 for (i = 0; i < sense_size; i++) { 1954 if ((i & 0xF) == 0) 1955 printk("\n"); 1956 printk("0x%x ", cmd->sense_buffer[i]); 1957 } 1958 printk("\n"); 1959 } 1960 #endif 1961 } 1962 break; 1963 } 1964 case SCSI_STATUS_QUEUE_FULL: 1965 /* 1966 * By the time the core driver has returned this 1967 * command, all other commands that were queued 1968 * to us but not the device have been returned. 1969 * This ensures that dev->active is equal to 1970 * the number of commands actually queued to 1971 * the device. 1972 */ 1973 dev->tag_success_count = 0; 1974 if (dev->active != 0) { 1975 /* 1976 * Drop our opening count to the number 1977 * of commands currently outstanding. 1978 */ 1979 dev->openings = 0; 1980 #ifdef AHD_DEBUG 1981 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1982 ahd_print_path(ahd, scb); 1983 printk("Dropping tag count to %d\n", 1984 dev->active); 1985 } 1986 #endif 1987 if (dev->active == dev->tags_on_last_queuefull) { 1988 1989 dev->last_queuefull_same_count++; 1990 /* 1991 * If we repeatedly see a queue full 1992 * at the same queue depth, this 1993 * device has a fixed number of tag 1994 * slots. Lock in this tag depth 1995 * so we stop seeing queue fulls from 1996 * this device. 1997 */ 1998 if (dev->last_queuefull_same_count 1999 == AHD_LOCK_TAGS_COUNT) { 2000 dev->maxtags = dev->active; 2001 ahd_print_path(ahd, scb); 2002 printk("Locking max tag count at %d\n", 2003 dev->active); 2004 } 2005 } else { 2006 dev->tags_on_last_queuefull = dev->active; 2007 dev->last_queuefull_same_count = 0; 2008 } 2009 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 2010 ahd_set_scsi_status(scb, SCSI_STATUS_OK); 2011 ahd_platform_set_tags(ahd, sdev, &devinfo, 2012 (dev->flags & AHD_DEV_Q_BASIC) 2013 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2014 break; 2015 } 2016 /* 2017 * Drop down to a single opening, and treat this 2018 * as if the target returned BUSY SCSI status. 2019 */ 2020 dev->openings = 1; 2021 ahd_platform_set_tags(ahd, sdev, &devinfo, 2022 (dev->flags & AHD_DEV_Q_BASIC) 2023 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2024 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); 2025 } 2026 } 2027 2028 static void 2029 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 2030 { 2031 int status; 2032 int new_status = DID_OK; 2033 int do_fallback = 0; 2034 int scsi_status; 2035 2036 /* 2037 * Map CAM error codes into Linux Error codes. We 2038 * avoid the conversion so that the DV code has the 2039 * full error information available when making 2040 * state change decisions. 2041 */ 2042 2043 status = ahd_cmd_get_transaction_status(cmd); 2044 switch (status) { 2045 case CAM_REQ_INPROG: 2046 case CAM_REQ_CMP: 2047 new_status = DID_OK; 2048 break; 2049 case CAM_AUTOSENSE_FAIL: 2050 new_status = DID_ERROR; 2051 /* Fallthrough */ 2052 case CAM_SCSI_STATUS_ERROR: 2053 scsi_status = ahd_cmd_get_scsi_status(cmd); 2054 2055 switch(scsi_status) { 2056 case SCSI_STATUS_CMD_TERMINATED: 2057 case SCSI_STATUS_CHECK_COND: 2058 if ((cmd->result >> 24) != DRIVER_SENSE) { 2059 do_fallback = 1; 2060 } else { 2061 struct scsi_sense_data *sense; 2062 2063 sense = (struct scsi_sense_data *) 2064 cmd->sense_buffer; 2065 if (sense->extra_len >= 5 && 2066 (sense->add_sense_code == 0x47 2067 || sense->add_sense_code == 0x48)) 2068 do_fallback = 1; 2069 } 2070 break; 2071 default: 2072 break; 2073 } 2074 break; 2075 case CAM_REQ_ABORTED: 2076 new_status = DID_ABORT; 2077 break; 2078 case CAM_BUSY: 2079 new_status = DID_BUS_BUSY; 2080 break; 2081 case CAM_REQ_INVALID: 2082 case CAM_PATH_INVALID: 2083 new_status = DID_BAD_TARGET; 2084 break; 2085 case CAM_SEL_TIMEOUT: 2086 new_status = DID_NO_CONNECT; 2087 break; 2088 case CAM_SCSI_BUS_RESET: 2089 case CAM_BDR_SENT: 2090 new_status = DID_RESET; 2091 break; 2092 case CAM_UNCOR_PARITY: 2093 new_status = DID_PARITY; 2094 do_fallback = 1; 2095 break; 2096 case CAM_CMD_TIMEOUT: 2097 new_status = DID_TIME_OUT; 2098 do_fallback = 1; 2099 break; 2100 case CAM_REQ_CMP_ERR: 2101 case CAM_UNEXP_BUSFREE: 2102 case CAM_DATA_RUN_ERR: 2103 new_status = DID_ERROR; 2104 do_fallback = 1; 2105 break; 2106 case CAM_UA_ABORT: 2107 case CAM_NO_HBA: 2108 case CAM_SEQUENCE_FAIL: 2109 case CAM_CCB_LEN_ERR: 2110 case CAM_PROVIDE_FAIL: 2111 case CAM_REQ_TERMIO: 2112 case CAM_UNREC_HBA_ERROR: 2113 case CAM_REQ_TOO_BIG: 2114 new_status = DID_ERROR; 2115 break; 2116 case CAM_REQUEUE_REQ: 2117 new_status = DID_REQUEUE; 2118 break; 2119 default: 2120 /* We should never get here */ 2121 new_status = DID_ERROR; 2122 break; 2123 } 2124 2125 if (do_fallback) { 2126 printk("%s: device overrun (status %x) on %d:%d:%d\n", 2127 ahd_name(ahd), status, cmd->device->channel, 2128 cmd->device->id, (u8)cmd->device->lun); 2129 } 2130 2131 ahd_cmd_set_transaction_status(cmd, new_status); 2132 2133 cmd->scsi_done(cmd); 2134 } 2135 2136 static void 2137 ahd_freeze_simq(struct ahd_softc *ahd) 2138 { 2139 scsi_block_requests(ahd->platform_data->host); 2140 } 2141 2142 static void 2143 ahd_release_simq(struct ahd_softc *ahd) 2144 { 2145 scsi_unblock_requests(ahd->platform_data->host); 2146 } 2147 2148 static int 2149 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2150 { 2151 struct ahd_softc *ahd; 2152 struct ahd_linux_device *dev; 2153 struct scb *pending_scb; 2154 u_int saved_scbptr; 2155 u_int active_scbptr; 2156 u_int last_phase; 2157 u_int saved_scsiid; 2158 u_int cdb_byte; 2159 int retval; 2160 int was_paused; 2161 int paused; 2162 int wait; 2163 int disconnected; 2164 ahd_mode_state saved_modes; 2165 unsigned long flags; 2166 2167 pending_scb = NULL; 2168 paused = FALSE; 2169 wait = FALSE; 2170 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2171 2172 scmd_printk(KERN_INFO, cmd, 2173 "Attempting to queue an ABORT message:"); 2174 2175 printk("CDB:"); 2176 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2177 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2178 printk("\n"); 2179 2180 ahd_lock(ahd, &flags); 2181 2182 /* 2183 * First determine if we currently own this command. 2184 * Start by searching the device queue. If not found 2185 * there, check the pending_scb list. If not found 2186 * at all, and the system wanted us to just abort the 2187 * command, return success. 2188 */ 2189 dev = scsi_transport_device_data(cmd->device); 2190 2191 if (dev == NULL) { 2192 /* 2193 * No target device for this command exists, 2194 * so we must not still own the command. 2195 */ 2196 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2197 retval = SUCCESS; 2198 goto no_cmd; 2199 } 2200 2201 /* 2202 * See if we can find a matching cmd in the pending list. 2203 */ 2204 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2205 if (pending_scb->io_ctx == cmd) 2206 break; 2207 } 2208 2209 if (pending_scb == NULL) { 2210 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2211 goto no_cmd; 2212 } 2213 2214 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2215 /* 2216 * We can't queue two recovery actions using the same SCB 2217 */ 2218 retval = FAILED; 2219 goto done; 2220 } 2221 2222 /* 2223 * Ensure that the card doesn't do anything 2224 * behind our back. Also make sure that we 2225 * didn't "just" miss an interrupt that would 2226 * affect this cmd. 2227 */ 2228 was_paused = ahd_is_paused(ahd); 2229 ahd_pause_and_flushwork(ahd); 2230 paused = TRUE; 2231 2232 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2233 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2234 goto no_cmd; 2235 } 2236 2237 printk("%s: At time of recovery, card was %spaused\n", 2238 ahd_name(ahd), was_paused ? "" : "not "); 2239 ahd_dump_card_state(ahd); 2240 2241 disconnected = TRUE; 2242 if (ahd_search_qinfifo(ahd, cmd->device->id, 2243 cmd->device->channel + 'A', 2244 cmd->device->lun, 2245 pending_scb->hscb->tag, 2246 ROLE_INITIATOR, CAM_REQ_ABORTED, 2247 SEARCH_COMPLETE) > 0) { 2248 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2249 ahd_name(ahd), cmd->device->channel, 2250 cmd->device->id, (u8)cmd->device->lun); 2251 retval = SUCCESS; 2252 goto done; 2253 } 2254 2255 saved_modes = ahd_save_modes(ahd); 2256 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2257 last_phase = ahd_inb(ahd, LASTPHASE); 2258 saved_scbptr = ahd_get_scbptr(ahd); 2259 active_scbptr = saved_scbptr; 2260 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2261 struct scb *bus_scb; 2262 2263 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2264 if (bus_scb == pending_scb) 2265 disconnected = FALSE; 2266 } 2267 2268 /* 2269 * At this point, pending_scb is the scb associated with the 2270 * passed in command. That command is currently active on the 2271 * bus or is in the disconnected state. 2272 */ 2273 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); 2274 if (last_phase != P_BUSFREE 2275 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2276 2277 /* 2278 * We're active on the bus, so assert ATN 2279 * and hope that the target responds. 2280 */ 2281 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2282 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2283 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2284 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2285 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2286 wait = TRUE; 2287 } else if (disconnected) { 2288 2289 /* 2290 * Actually re-queue this SCB in an attempt 2291 * to select the device before it reconnects. 2292 */ 2293 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2294 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2295 pending_scb->hscb->cdb_len = 0; 2296 pending_scb->hscb->task_attribute = 0; 2297 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2298 2299 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2300 /* 2301 * Mark the SCB has having an outstanding 2302 * task management function. Should the command 2303 * complete normally before the task management 2304 * function can be sent, the host will be notified 2305 * to abort our requeued SCB. 2306 */ 2307 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2308 pending_scb->hscb->task_management); 2309 } else { 2310 /* 2311 * If non-packetized, set the MK_MESSAGE control 2312 * bit indicating that we desire to send a message. 2313 * We also set the disconnected flag since there is 2314 * no guarantee that our SCB control byte matches 2315 * the version on the card. We don't want the 2316 * sequencer to abort the command thinking an 2317 * unsolicited reselection occurred. 2318 */ 2319 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2320 2321 /* 2322 * The sequencer will never re-reference the 2323 * in-core SCB. To make sure we are notified 2324 * during reselection, set the MK_MESSAGE flag in 2325 * the card's copy of the SCB. 2326 */ 2327 ahd_outb(ahd, SCB_CONTROL, 2328 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2329 } 2330 2331 /* 2332 * Clear out any entries in the QINFIFO first 2333 * so we are the next SCB for this target 2334 * to run. 2335 */ 2336 ahd_search_qinfifo(ahd, cmd->device->id, 2337 cmd->device->channel + 'A', cmd->device->lun, 2338 SCB_LIST_NULL, ROLE_INITIATOR, 2339 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2340 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2341 ahd_set_scbptr(ahd, saved_scbptr); 2342 ahd_print_path(ahd, pending_scb); 2343 printk("Device is disconnected, re-queuing SCB\n"); 2344 wait = TRUE; 2345 } else { 2346 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2347 retval = FAILED; 2348 goto done; 2349 } 2350 2351 no_cmd: 2352 /* 2353 * Our assumption is that if we don't have the command, no 2354 * recovery action was required, so we return success. Again, 2355 * the semantics of the mid-layer recovery engine are not 2356 * well defined, so this may change in time. 2357 */ 2358 retval = SUCCESS; 2359 done: 2360 if (paused) 2361 ahd_unpause(ahd); 2362 if (wait) { 2363 DECLARE_COMPLETION_ONSTACK(done); 2364 2365 ahd->platform_data->eh_done = &done; 2366 ahd_unlock(ahd, &flags); 2367 2368 printk("%s: Recovery code sleeping\n", ahd_name(ahd)); 2369 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2370 ahd_lock(ahd, &flags); 2371 ahd->platform_data->eh_done = NULL; 2372 ahd_unlock(ahd, &flags); 2373 printk("%s: Timer Expired (active %d)\n", 2374 ahd_name(ahd), dev->active); 2375 retval = FAILED; 2376 } 2377 printk("Recovery code awake\n"); 2378 } else 2379 ahd_unlock(ahd, &flags); 2380 2381 if (retval != SUCCESS) 2382 printk("%s: Command abort returning 0x%x\n", 2383 ahd_name(ahd), retval); 2384 2385 return retval; 2386 } 2387 2388 static void ahd_linux_set_width(struct scsi_target *starget, int width) 2389 { 2390 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2391 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2392 struct ahd_devinfo devinfo; 2393 unsigned long flags; 2394 2395 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2396 starget->channel + 'A', ROLE_INITIATOR); 2397 ahd_lock(ahd, &flags); 2398 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2399 ahd_unlock(ahd, &flags); 2400 } 2401 2402 static void ahd_linux_set_period(struct scsi_target *starget, int period) 2403 { 2404 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2405 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2406 struct ahd_tmode_tstate *tstate; 2407 struct ahd_initiator_tinfo *tinfo 2408 = ahd_fetch_transinfo(ahd, 2409 starget->channel + 'A', 2410 shost->this_id, starget->id, &tstate); 2411 struct ahd_devinfo devinfo; 2412 unsigned int ppr_options = tinfo->goal.ppr_options; 2413 unsigned int dt; 2414 unsigned long flags; 2415 unsigned long offset = tinfo->goal.offset; 2416 2417 #ifdef AHD_DEBUG 2418 if ((ahd_debug & AHD_SHOW_DV) != 0) 2419 printk("%s: set period to %d\n", ahd_name(ahd), period); 2420 #endif 2421 if (offset == 0) 2422 offset = MAX_OFFSET; 2423 2424 if (period < 8) 2425 period = 8; 2426 if (period < 10) { 2427 if (spi_max_width(starget)) { 2428 ppr_options |= MSG_EXT_PPR_DT_REQ; 2429 if (period == 8) 2430 ppr_options |= MSG_EXT_PPR_IU_REQ; 2431 } else 2432 period = 10; 2433 } 2434 2435 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2436 2437 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2438 starget->channel + 'A', ROLE_INITIATOR); 2439 2440 /* all PPR requests apart from QAS require wide transfers */ 2441 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2442 if (spi_width(starget) == 0) 2443 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2444 } 2445 2446 ahd_find_syncrate(ahd, &period, &ppr_options, 2447 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2448 2449 ahd_lock(ahd, &flags); 2450 ahd_set_syncrate(ahd, &devinfo, period, offset, 2451 ppr_options, AHD_TRANS_GOAL, FALSE); 2452 ahd_unlock(ahd, &flags); 2453 } 2454 2455 static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2456 { 2457 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2458 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2459 struct ahd_tmode_tstate *tstate; 2460 struct ahd_initiator_tinfo *tinfo 2461 = ahd_fetch_transinfo(ahd, 2462 starget->channel + 'A', 2463 shost->this_id, starget->id, &tstate); 2464 struct ahd_devinfo devinfo; 2465 unsigned int ppr_options = 0; 2466 unsigned int period = 0; 2467 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2468 unsigned long flags; 2469 2470 #ifdef AHD_DEBUG 2471 if ((ahd_debug & AHD_SHOW_DV) != 0) 2472 printk("%s: set offset to %d\n", ahd_name(ahd), offset); 2473 #endif 2474 2475 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2476 starget->channel + 'A', ROLE_INITIATOR); 2477 if (offset != 0) { 2478 period = tinfo->goal.period; 2479 ppr_options = tinfo->goal.ppr_options; 2480 ahd_find_syncrate(ahd, &period, &ppr_options, 2481 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2482 } 2483 2484 ahd_lock(ahd, &flags); 2485 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2486 AHD_TRANS_GOAL, FALSE); 2487 ahd_unlock(ahd, &flags); 2488 } 2489 2490 static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2491 { 2492 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2493 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2494 struct ahd_tmode_tstate *tstate; 2495 struct ahd_initiator_tinfo *tinfo 2496 = ahd_fetch_transinfo(ahd, 2497 starget->channel + 'A', 2498 shost->this_id, starget->id, &tstate); 2499 struct ahd_devinfo devinfo; 2500 unsigned int ppr_options = tinfo->goal.ppr_options 2501 & ~MSG_EXT_PPR_DT_REQ; 2502 unsigned int period = tinfo->goal.period; 2503 unsigned int width = tinfo->goal.width; 2504 unsigned long flags; 2505 2506 #ifdef AHD_DEBUG 2507 if ((ahd_debug & AHD_SHOW_DV) != 0) 2508 printk("%s: %s DT\n", ahd_name(ahd), 2509 dt ? "enabling" : "disabling"); 2510 #endif 2511 if (dt && spi_max_width(starget)) { 2512 ppr_options |= MSG_EXT_PPR_DT_REQ; 2513 if (!width) 2514 ahd_linux_set_width(starget, 1); 2515 } else { 2516 if (period <= 9) 2517 period = 10; /* If resetting DT, period must be >= 25ns */ 2518 /* IU is invalid without DT set */ 2519 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2520 } 2521 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2522 starget->channel + 'A', ROLE_INITIATOR); 2523 ahd_find_syncrate(ahd, &period, &ppr_options, 2524 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2525 2526 ahd_lock(ahd, &flags); 2527 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2528 ppr_options, AHD_TRANS_GOAL, FALSE); 2529 ahd_unlock(ahd, &flags); 2530 } 2531 2532 static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2533 { 2534 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2535 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2536 struct ahd_tmode_tstate *tstate; 2537 struct ahd_initiator_tinfo *tinfo 2538 = ahd_fetch_transinfo(ahd, 2539 starget->channel + 'A', 2540 shost->this_id, starget->id, &tstate); 2541 struct ahd_devinfo devinfo; 2542 unsigned int ppr_options = tinfo->goal.ppr_options 2543 & ~MSG_EXT_PPR_QAS_REQ; 2544 unsigned int period = tinfo->goal.period; 2545 unsigned int dt; 2546 unsigned long flags; 2547 2548 #ifdef AHD_DEBUG 2549 if ((ahd_debug & AHD_SHOW_DV) != 0) 2550 printk("%s: %s QAS\n", ahd_name(ahd), 2551 qas ? "enabling" : "disabling"); 2552 #endif 2553 2554 if (qas) { 2555 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2556 } 2557 2558 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2559 2560 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2561 starget->channel + 'A', ROLE_INITIATOR); 2562 ahd_find_syncrate(ahd, &period, &ppr_options, 2563 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2564 2565 ahd_lock(ahd, &flags); 2566 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2567 ppr_options, AHD_TRANS_GOAL, FALSE); 2568 ahd_unlock(ahd, &flags); 2569 } 2570 2571 static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 2572 { 2573 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2574 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2575 struct ahd_tmode_tstate *tstate; 2576 struct ahd_initiator_tinfo *tinfo 2577 = ahd_fetch_transinfo(ahd, 2578 starget->channel + 'A', 2579 shost->this_id, starget->id, &tstate); 2580 struct ahd_devinfo devinfo; 2581 unsigned int ppr_options = tinfo->goal.ppr_options 2582 & ~MSG_EXT_PPR_IU_REQ; 2583 unsigned int period = tinfo->goal.period; 2584 unsigned int dt; 2585 unsigned long flags; 2586 2587 #ifdef AHD_DEBUG 2588 if ((ahd_debug & AHD_SHOW_DV) != 0) 2589 printk("%s: %s IU\n", ahd_name(ahd), 2590 iu ? "enabling" : "disabling"); 2591 #endif 2592 2593 if (iu && spi_max_width(starget)) { 2594 ppr_options |= MSG_EXT_PPR_IU_REQ; 2595 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2596 } 2597 2598 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2599 2600 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2601 starget->channel + 'A', ROLE_INITIATOR); 2602 ahd_find_syncrate(ahd, &period, &ppr_options, 2603 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2604 2605 ahd_lock(ahd, &flags); 2606 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2607 ppr_options, AHD_TRANS_GOAL, FALSE); 2608 ahd_unlock(ahd, &flags); 2609 } 2610 2611 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2612 { 2613 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2614 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2615 struct ahd_tmode_tstate *tstate; 2616 struct ahd_initiator_tinfo *tinfo 2617 = ahd_fetch_transinfo(ahd, 2618 starget->channel + 'A', 2619 shost->this_id, starget->id, &tstate); 2620 struct ahd_devinfo devinfo; 2621 unsigned int ppr_options = tinfo->goal.ppr_options 2622 & ~MSG_EXT_PPR_RD_STRM; 2623 unsigned int period = tinfo->goal.period; 2624 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2625 unsigned long flags; 2626 2627 #ifdef AHD_DEBUG 2628 if ((ahd_debug & AHD_SHOW_DV) != 0) 2629 printk("%s: %s Read Streaming\n", ahd_name(ahd), 2630 rdstrm ? "enabling" : "disabling"); 2631 #endif 2632 2633 if (rdstrm && spi_max_width(starget)) 2634 ppr_options |= MSG_EXT_PPR_RD_STRM; 2635 2636 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2637 starget->channel + 'A', ROLE_INITIATOR); 2638 ahd_find_syncrate(ahd, &period, &ppr_options, 2639 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2640 2641 ahd_lock(ahd, &flags); 2642 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2643 ppr_options, AHD_TRANS_GOAL, FALSE); 2644 ahd_unlock(ahd, &flags); 2645 } 2646 2647 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2648 { 2649 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2650 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2651 struct ahd_tmode_tstate *tstate; 2652 struct ahd_initiator_tinfo *tinfo 2653 = ahd_fetch_transinfo(ahd, 2654 starget->channel + 'A', 2655 shost->this_id, starget->id, &tstate); 2656 struct ahd_devinfo devinfo; 2657 unsigned int ppr_options = tinfo->goal.ppr_options 2658 & ~MSG_EXT_PPR_WR_FLOW; 2659 unsigned int period = tinfo->goal.period; 2660 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2661 unsigned long flags; 2662 2663 #ifdef AHD_DEBUG 2664 if ((ahd_debug & AHD_SHOW_DV) != 0) 2665 printk("%s: %s Write Flow Control\n", ahd_name(ahd), 2666 wrflow ? "enabling" : "disabling"); 2667 #endif 2668 2669 if (wrflow && spi_max_width(starget)) 2670 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2671 2672 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2673 starget->channel + 'A', ROLE_INITIATOR); 2674 ahd_find_syncrate(ahd, &period, &ppr_options, 2675 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2676 2677 ahd_lock(ahd, &flags); 2678 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2679 ppr_options, AHD_TRANS_GOAL, FALSE); 2680 ahd_unlock(ahd, &flags); 2681 } 2682 2683 static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2684 { 2685 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2686 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2687 struct ahd_tmode_tstate *tstate; 2688 struct ahd_initiator_tinfo *tinfo 2689 = ahd_fetch_transinfo(ahd, 2690 starget->channel + 'A', 2691 shost->this_id, starget->id, &tstate); 2692 struct ahd_devinfo devinfo; 2693 unsigned int ppr_options = tinfo->goal.ppr_options 2694 & ~MSG_EXT_PPR_RTI; 2695 unsigned int period = tinfo->goal.period; 2696 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2697 unsigned long flags; 2698 2699 if ((ahd->features & AHD_RTI) == 0) { 2700 #ifdef AHD_DEBUG 2701 if ((ahd_debug & AHD_SHOW_DV) != 0) 2702 printk("%s: RTI not available\n", ahd_name(ahd)); 2703 #endif 2704 return; 2705 } 2706 2707 #ifdef AHD_DEBUG 2708 if ((ahd_debug & AHD_SHOW_DV) != 0) 2709 printk("%s: %s RTI\n", ahd_name(ahd), 2710 rti ? "enabling" : "disabling"); 2711 #endif 2712 2713 if (rti && spi_max_width(starget)) 2714 ppr_options |= MSG_EXT_PPR_RTI; 2715 2716 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2717 starget->channel + 'A', ROLE_INITIATOR); 2718 ahd_find_syncrate(ahd, &period, &ppr_options, 2719 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2720 2721 ahd_lock(ahd, &flags); 2722 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2723 ppr_options, AHD_TRANS_GOAL, FALSE); 2724 ahd_unlock(ahd, &flags); 2725 } 2726 2727 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2728 { 2729 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2730 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2731 struct ahd_tmode_tstate *tstate; 2732 struct ahd_initiator_tinfo *tinfo 2733 = ahd_fetch_transinfo(ahd, 2734 starget->channel + 'A', 2735 shost->this_id, starget->id, &tstate); 2736 struct ahd_devinfo devinfo; 2737 unsigned int ppr_options = tinfo->goal.ppr_options 2738 & ~MSG_EXT_PPR_PCOMP_EN; 2739 unsigned int period = tinfo->goal.period; 2740 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2741 unsigned long flags; 2742 2743 #ifdef AHD_DEBUG 2744 if ((ahd_debug & AHD_SHOW_DV) != 0) 2745 printk("%s: %s Precompensation\n", ahd_name(ahd), 2746 pcomp ? "Enable" : "Disable"); 2747 #endif 2748 2749 if (pcomp && spi_max_width(starget)) { 2750 uint8_t precomp; 2751 2752 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 2753 const struct ahd_linux_iocell_opts *iocell_opts; 2754 2755 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2756 precomp = iocell_opts->precomp; 2757 } else { 2758 precomp = AIC79XX_DEFAULT_PRECOMP; 2759 } 2760 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2761 AHD_SET_PRECOMP(ahd, precomp); 2762 } else { 2763 AHD_SET_PRECOMP(ahd, 0); 2764 } 2765 2766 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2767 starget->channel + 'A', ROLE_INITIATOR); 2768 ahd_find_syncrate(ahd, &period, &ppr_options, 2769 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2770 2771 ahd_lock(ahd, &flags); 2772 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2773 ppr_options, AHD_TRANS_GOAL, FALSE); 2774 ahd_unlock(ahd, &flags); 2775 } 2776 2777 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2778 { 2779 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2780 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2781 struct ahd_tmode_tstate *tstate; 2782 struct ahd_initiator_tinfo *tinfo 2783 = ahd_fetch_transinfo(ahd, 2784 starget->channel + 'A', 2785 shost->this_id, starget->id, &tstate); 2786 struct ahd_devinfo devinfo; 2787 unsigned int ppr_options = tinfo->goal.ppr_options 2788 & ~MSG_EXT_PPR_HOLD_MCS; 2789 unsigned int period = tinfo->goal.period; 2790 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2791 unsigned long flags; 2792 2793 if (hold && spi_max_width(starget)) 2794 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2795 2796 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2797 starget->channel + 'A', ROLE_INITIATOR); 2798 ahd_find_syncrate(ahd, &period, &ppr_options, 2799 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2800 2801 ahd_lock(ahd, &flags); 2802 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2803 ppr_options, AHD_TRANS_GOAL, FALSE); 2804 ahd_unlock(ahd, &flags); 2805 } 2806 2807 static void ahd_linux_get_signalling(struct Scsi_Host *shost) 2808 { 2809 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; 2810 unsigned long flags; 2811 u8 mode; 2812 2813 ahd_lock(ahd, &flags); 2814 ahd_pause(ahd); 2815 mode = ahd_inb(ahd, SBLKCTL); 2816 ahd_unpause(ahd); 2817 ahd_unlock(ahd, &flags); 2818 2819 if (mode & ENAB40) 2820 spi_signalling(shost) = SPI_SIGNAL_LVD; 2821 else if (mode & ENAB20) 2822 spi_signalling(shost) = SPI_SIGNAL_SE; 2823 else 2824 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2825 } 2826 2827 static struct spi_function_template ahd_linux_transport_functions = { 2828 .set_offset = ahd_linux_set_offset, 2829 .show_offset = 1, 2830 .set_period = ahd_linux_set_period, 2831 .show_period = 1, 2832 .set_width = ahd_linux_set_width, 2833 .show_width = 1, 2834 .set_dt = ahd_linux_set_dt, 2835 .show_dt = 1, 2836 .set_iu = ahd_linux_set_iu, 2837 .show_iu = 1, 2838 .set_qas = ahd_linux_set_qas, 2839 .show_qas = 1, 2840 .set_rd_strm = ahd_linux_set_rd_strm, 2841 .show_rd_strm = 1, 2842 .set_wr_flow = ahd_linux_set_wr_flow, 2843 .show_wr_flow = 1, 2844 .set_rti = ahd_linux_set_rti, 2845 .show_rti = 1, 2846 .set_pcomp_en = ahd_linux_set_pcomp_en, 2847 .show_pcomp_en = 1, 2848 .set_hold_mcs = ahd_linux_set_hold_mcs, 2849 .show_hold_mcs = 1, 2850 .get_signalling = ahd_linux_get_signalling, 2851 }; 2852 2853 static int __init 2854 ahd_linux_init(void) 2855 { 2856 int error = 0; 2857 2858 /* 2859 * If we've been passed any parameters, process them now. 2860 */ 2861 if (aic79xx) 2862 aic79xx_setup(aic79xx); 2863 2864 ahd_linux_transport_template = 2865 spi_attach_transport(&ahd_linux_transport_functions); 2866 if (!ahd_linux_transport_template) 2867 return -ENODEV; 2868 2869 scsi_transport_reserve_device(ahd_linux_transport_template, 2870 sizeof(struct ahd_linux_device)); 2871 2872 error = ahd_linux_pci_init(); 2873 if (error) 2874 spi_release_transport(ahd_linux_transport_template); 2875 return error; 2876 } 2877 2878 static void __exit 2879 ahd_linux_exit(void) 2880 { 2881 ahd_linux_pci_exit(); 2882 spi_release_transport(ahd_linux_transport_template); 2883 } 2884 2885 module_init(ahd_linux_init); 2886 module_exit(ahd_linux_exit); 2887