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