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 .proc_info = ahd_linux_proc_info, 910 .info = ahd_linux_info, 911 .queuecommand = ahd_linux_queue, 912 .eh_abort_handler = ahd_linux_abort, 913 .eh_device_reset_handler = ahd_linux_dev_reset, 914 .eh_bus_reset_handler = ahd_linux_bus_reset, 915 #if defined(__i386__) 916 .bios_param = ahd_linux_biosparam, 917 #endif 918 .can_queue = AHD_MAX_QUEUE, 919 .this_id = -1, 920 .max_sectors = 8192, 921 .cmd_per_lun = 2, 922 .use_clustering = ENABLE_CLUSTERING, 923 .slave_alloc = ahd_linux_slave_alloc, 924 .slave_configure = ahd_linux_slave_configure, 925 .target_alloc = ahd_linux_target_alloc, 926 .target_destroy = ahd_linux_target_destroy, 927 }; 928 929 /******************************** Bus DMA *************************************/ 930 int 931 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 932 bus_size_t alignment, bus_size_t boundary, 933 dma_addr_t lowaddr, dma_addr_t highaddr, 934 bus_dma_filter_t *filter, void *filterarg, 935 bus_size_t maxsize, int nsegments, 936 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 937 { 938 bus_dma_tag_t dmat; 939 940 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 941 if (dmat == NULL) 942 return (ENOMEM); 943 944 /* 945 * Linux is very simplistic about DMA memory. For now don't 946 * maintain all specification information. Once Linux supplies 947 * better facilities for doing these operations, or the 948 * needs of this particular driver change, we might need to do 949 * more here. 950 */ 951 dmat->alignment = alignment; 952 dmat->boundary = boundary; 953 dmat->maxsize = maxsize; 954 *ret_tag = dmat; 955 return (0); 956 } 957 958 void 959 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 960 { 961 kfree(dmat); 962 } 963 964 int 965 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 966 int flags, bus_dmamap_t *mapp) 967 { 968 *vaddr = pci_alloc_consistent(ahd->dev_softc, 969 dmat->maxsize, mapp); 970 if (*vaddr == NULL) 971 return (ENOMEM); 972 return(0); 973 } 974 975 void 976 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 977 void* vaddr, bus_dmamap_t map) 978 { 979 pci_free_consistent(ahd->dev_softc, dmat->maxsize, 980 vaddr, map); 981 } 982 983 int 984 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 985 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 986 void *cb_arg, int flags) 987 { 988 /* 989 * Assume for now that this will only be used during 990 * initialization and not for per-transaction buffer mapping. 991 */ 992 bus_dma_segment_t stack_sg; 993 994 stack_sg.ds_addr = map; 995 stack_sg.ds_len = dmat->maxsize; 996 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 997 return (0); 998 } 999 1000 void 1001 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 1002 { 1003 } 1004 1005 int 1006 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 1007 { 1008 /* Nothing to do */ 1009 return (0); 1010 } 1011 1012 /********************* Platform Dependent Functions ***************************/ 1013 static void 1014 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 1015 { 1016 1017 if ((instance >= 0) 1018 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { 1019 uint8_t *iocell_info; 1020 1021 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 1022 iocell_info[index] = value & 0xFFFF; 1023 if (bootverbose) 1024 printk("iocell[%d:%ld] = %d\n", instance, index, value); 1025 } 1026 } 1027 1028 static void 1029 ahd_linux_setup_tag_info_global(char *p) 1030 { 1031 int tags, i, j; 1032 1033 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 1034 printk("Setting Global Tags= %d\n", tags); 1035 1036 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { 1037 for (j = 0; j < AHD_NUM_TARGETS; j++) { 1038 aic79xx_tag_info[i].tag_commands[j] = tags; 1039 } 1040 } 1041 } 1042 1043 static void 1044 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 1045 { 1046 1047 if ((instance >= 0) && (targ >= 0) 1048 && (instance < ARRAY_SIZE(aic79xx_tag_info)) 1049 && (targ < AHD_NUM_TARGETS)) { 1050 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 1051 if (bootverbose) 1052 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 1053 } 1054 } 1055 1056 static char * 1057 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 1058 void (*callback)(u_long, int, int, int32_t), 1059 u_long callback_arg) 1060 { 1061 char *tok_end; 1062 char *tok_end2; 1063 int i; 1064 int instance; 1065 int targ; 1066 int done; 1067 char tok_list[] = {'.', ',', '{', '}', '\0'}; 1068 1069 /* All options use a ':' name/arg separator */ 1070 if (*opt_arg != ':') 1071 return (opt_arg); 1072 opt_arg++; 1073 instance = -1; 1074 targ = -1; 1075 done = FALSE; 1076 /* 1077 * Restore separator that may be in 1078 * the middle of our option argument. 1079 */ 1080 tok_end = strchr(opt_arg, '\0'); 1081 if (tok_end < end) 1082 *tok_end = ','; 1083 while (!done) { 1084 switch (*opt_arg) { 1085 case '{': 1086 if (instance == -1) { 1087 instance = 0; 1088 } else { 1089 if (depth > 1) { 1090 if (targ == -1) 1091 targ = 0; 1092 } else { 1093 printk("Malformed Option %s\n", 1094 opt_name); 1095 done = TRUE; 1096 } 1097 } 1098 opt_arg++; 1099 break; 1100 case '}': 1101 if (targ != -1) 1102 targ = -1; 1103 else if (instance != -1) 1104 instance = -1; 1105 opt_arg++; 1106 break; 1107 case ',': 1108 case '.': 1109 if (instance == -1) 1110 done = TRUE; 1111 else if (targ >= 0) 1112 targ++; 1113 else if (instance >= 0) 1114 instance++; 1115 opt_arg++; 1116 break; 1117 case '\0': 1118 done = TRUE; 1119 break; 1120 default: 1121 tok_end = end; 1122 for (i = 0; tok_list[i]; i++) { 1123 tok_end2 = strchr(opt_arg, tok_list[i]); 1124 if ((tok_end2) && (tok_end2 < tok_end)) 1125 tok_end = tok_end2; 1126 } 1127 callback(callback_arg, instance, targ, 1128 simple_strtol(opt_arg, NULL, 0)); 1129 opt_arg = tok_end; 1130 break; 1131 } 1132 } 1133 return (opt_arg); 1134 } 1135 1136 /* 1137 * Handle Linux boot parameters. This routine allows for assigning a value 1138 * to a parameter with a ':' between the parameter and the value. 1139 * ie. aic79xx=stpwlev:1,extended 1140 */ 1141 static int 1142 aic79xx_setup(char *s) 1143 { 1144 int i, n; 1145 char *p; 1146 char *end; 1147 1148 static const struct { 1149 const char *name; 1150 uint32_t *flag; 1151 } options[] = { 1152 { "extended", &aic79xx_extended }, 1153 { "no_reset", &aic79xx_no_reset }, 1154 { "verbose", &aic79xx_verbose }, 1155 { "allow_memio", &aic79xx_allow_memio}, 1156 #ifdef AHD_DEBUG 1157 { "debug", &ahd_debug }, 1158 #endif 1159 { "periodic_otag", &aic79xx_periodic_otag }, 1160 { "pci_parity", &aic79xx_pci_parity }, 1161 { "seltime", &aic79xx_seltime }, 1162 { "tag_info", NULL }, 1163 { "global_tag_depth", NULL}, 1164 { "slewrate", NULL }, 1165 { "precomp", NULL }, 1166 { "amplitude", NULL }, 1167 { "slowcrc", &aic79xx_slowcrc }, 1168 }; 1169 1170 end = strchr(s, '\0'); 1171 1172 /* 1173 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1174 * will never be 0 in this case. 1175 */ 1176 n = 0; 1177 1178 while ((p = strsep(&s, ",.")) != NULL) { 1179 if (*p == '\0') 1180 continue; 1181 for (i = 0; i < ARRAY_SIZE(options); i++) { 1182 1183 n = strlen(options[i].name); 1184 if (strncmp(options[i].name, p, n) == 0) 1185 break; 1186 } 1187 if (i == ARRAY_SIZE(options)) 1188 continue; 1189 1190 if (strncmp(p, "global_tag_depth", n) == 0) { 1191 ahd_linux_setup_tag_info_global(p + n); 1192 } else if (strncmp(p, "tag_info", n) == 0) { 1193 s = ahd_parse_brace_option("tag_info", p + n, end, 1194 2, ahd_linux_setup_tag_info, 0); 1195 } else if (strncmp(p, "slewrate", n) == 0) { 1196 s = ahd_parse_brace_option("slewrate", 1197 p + n, end, 1, ahd_linux_setup_iocell_info, 1198 AIC79XX_SLEWRATE_INDEX); 1199 } else if (strncmp(p, "precomp", n) == 0) { 1200 s = ahd_parse_brace_option("precomp", 1201 p + n, end, 1, ahd_linux_setup_iocell_info, 1202 AIC79XX_PRECOMP_INDEX); 1203 } else if (strncmp(p, "amplitude", n) == 0) { 1204 s = ahd_parse_brace_option("amplitude", 1205 p + n, end, 1, ahd_linux_setup_iocell_info, 1206 AIC79XX_AMPLITUDE_INDEX); 1207 } else if (p[n] == ':') { 1208 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1209 } else if (!strncmp(p, "verbose", n)) { 1210 *(options[i].flag) = 1; 1211 } else { 1212 *(options[i].flag) ^= 0xFFFFFFFF; 1213 } 1214 } 1215 return 1; 1216 } 1217 1218 __setup("aic79xx=", aic79xx_setup); 1219 1220 uint32_t aic79xx_verbose; 1221 1222 int 1223 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1224 { 1225 char buf[80]; 1226 struct Scsi_Host *host; 1227 char *new_name; 1228 u_long s; 1229 int retval; 1230 1231 template->name = ahd->description; 1232 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1233 if (host == NULL) 1234 return (ENOMEM); 1235 1236 *((struct ahd_softc **)host->hostdata) = ahd; 1237 ahd->platform_data->host = host; 1238 host->can_queue = AHD_MAX_QUEUE; 1239 host->cmd_per_lun = 2; 1240 host->sg_tablesize = AHD_NSEG; 1241 host->this_id = ahd->our_id; 1242 host->irq = ahd->platform_data->irq; 1243 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1244 host->max_lun = AHD_NUM_LUNS; 1245 host->max_channel = 0; 1246 host->sg_tablesize = AHD_NSEG; 1247 ahd_lock(ahd, &s); 1248 ahd_set_unit(ahd, ahd_linux_unit++); 1249 ahd_unlock(ahd, &s); 1250 sprintf(buf, "scsi%d", host->host_no); 1251 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1252 if (new_name != NULL) { 1253 strcpy(new_name, buf); 1254 ahd_set_name(ahd, new_name); 1255 } 1256 host->unique_id = ahd->unit; 1257 ahd_linux_initialize_scsi_bus(ahd); 1258 ahd_intr_enable(ahd, TRUE); 1259 1260 host->transportt = ahd_linux_transport_template; 1261 1262 retval = scsi_add_host(host, &ahd->dev_softc->dev); 1263 if (retval) { 1264 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); 1265 scsi_host_put(host); 1266 return retval; 1267 } 1268 1269 scsi_scan_host(host); 1270 return 0; 1271 } 1272 1273 /* 1274 * Place the SCSI bus into a known state by either resetting it, 1275 * or forcing transfer negotiations on the next command to any 1276 * target. 1277 */ 1278 static void 1279 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1280 { 1281 u_int target_id; 1282 u_int numtarg; 1283 unsigned long s; 1284 1285 target_id = 0; 1286 numtarg = 0; 1287 1288 if (aic79xx_no_reset != 0) 1289 ahd->flags &= ~AHD_RESET_BUS_A; 1290 1291 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1292 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1293 else 1294 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1295 1296 ahd_lock(ahd, &s); 1297 1298 /* 1299 * Force negotiation to async for all targets that 1300 * will not see an initial bus reset. 1301 */ 1302 for (; target_id < numtarg; target_id++) { 1303 struct ahd_devinfo devinfo; 1304 struct ahd_initiator_tinfo *tinfo; 1305 struct ahd_tmode_tstate *tstate; 1306 1307 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1308 target_id, &tstate); 1309 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1310 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1311 ahd_update_neg_request(ahd, &devinfo, tstate, 1312 tinfo, AHD_NEG_ALWAYS); 1313 } 1314 ahd_unlock(ahd, &s); 1315 /* Give the bus some time to recover */ 1316 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1317 ahd_freeze_simq(ahd); 1318 msleep(AIC79XX_RESET_DELAY); 1319 ahd_release_simq(ahd); 1320 } 1321 } 1322 1323 int 1324 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1325 { 1326 ahd->platform_data = 1327 kmalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC); 1328 if (ahd->platform_data == NULL) 1329 return (ENOMEM); 1330 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data)); 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 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK); 1471 scsi_activate_tcq(sdev, dev->openings + dev->active); 1472 break; 1473 case AHD_DEV_Q_TAGGED: 1474 scsi_set_tag_type(sdev, MSG_ORDERED_TASK); 1475 scsi_activate_tcq(sdev, dev->openings + dev->active); 1476 break; 1477 default: 1478 /* 1479 * We allow the OS to queue 2 untagged transactions to 1480 * us at any time even though we can only execute them 1481 * serially on the controller/device. This should 1482 * remove some latency. 1483 */ 1484 scsi_deactivate_tcq(sdev, 1); 1485 break; 1486 } 1487 } 1488 1489 int 1490 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1491 int lun, u_int tag, role_t role, uint32_t status) 1492 { 1493 return 0; 1494 } 1495 1496 static u_int 1497 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1498 { 1499 static int warned_user; 1500 u_int tags; 1501 1502 tags = 0; 1503 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1504 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { 1505 1506 if (warned_user == 0) { 1507 printk(KERN_WARNING 1508 "aic79xx: WARNING: Insufficient tag_info instances\n" 1509 "aic79xx: for installed controllers. Using defaults\n" 1510 "aic79xx: Please update the aic79xx_tag_info array in\n" 1511 "aic79xx: the aic79xx_osm.c source file.\n"); 1512 warned_user++; 1513 } 1514 tags = AHD_MAX_QUEUE; 1515 } else { 1516 adapter_tag_info_t *tag_info; 1517 1518 tag_info = &aic79xx_tag_info[ahd->unit]; 1519 tags = tag_info->tag_commands[devinfo->target_offset]; 1520 if (tags > AHD_MAX_QUEUE) 1521 tags = AHD_MAX_QUEUE; 1522 } 1523 } 1524 return (tags); 1525 } 1526 1527 /* 1528 * Determines the queue depth for a given device. 1529 */ 1530 static void 1531 ahd_linux_device_queue_depth(struct scsi_device *sdev) 1532 { 1533 struct ahd_devinfo devinfo; 1534 u_int tags; 1535 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1536 1537 ahd_compile_devinfo(&devinfo, 1538 ahd->our_id, 1539 sdev->sdev_target->id, sdev->lun, 1540 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1541 ROLE_INITIATOR); 1542 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1543 if (tags != 0 && sdev->tagged_supported != 0) { 1544 1545 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); 1546 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1547 devinfo.lun, AC_TRANSFER_NEG); 1548 ahd_print_devinfo(ahd, &devinfo); 1549 printk("Tagged Queuing enabled. Depth %d\n", tags); 1550 } else { 1551 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); 1552 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1553 devinfo.lun, AC_TRANSFER_NEG); 1554 } 1555 } 1556 1557 static int 1558 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1559 struct scsi_cmnd *cmd) 1560 { 1561 struct scb *scb; 1562 struct hardware_scb *hscb; 1563 struct ahd_initiator_tinfo *tinfo; 1564 struct ahd_tmode_tstate *tstate; 1565 u_int col_idx; 1566 uint16_t mask; 1567 unsigned long flags; 1568 int nseg; 1569 1570 nseg = scsi_dma_map(cmd); 1571 if (nseg < 0) 1572 return SCSI_MLQUEUE_HOST_BUSY; 1573 1574 ahd_lock(ahd, &flags); 1575 1576 /* 1577 * Get an scb to use. 1578 */ 1579 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1580 cmd->device->id, &tstate); 1581 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1582 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1583 col_idx = AHD_NEVER_COL_IDX; 1584 } else { 1585 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1586 cmd->device->lun); 1587 } 1588 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1589 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1590 ahd_unlock(ahd, &flags); 1591 scsi_dma_unmap(cmd); 1592 return SCSI_MLQUEUE_HOST_BUSY; 1593 } 1594 1595 scb->io_ctx = cmd; 1596 scb->platform_data->dev = dev; 1597 hscb = scb->hscb; 1598 cmd->host_scribble = (char *)scb; 1599 1600 /* 1601 * Fill out basics of the HSCB. 1602 */ 1603 hscb->control = 0; 1604 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1605 hscb->lun = cmd->device->lun; 1606 scb->hscb->task_management = 0; 1607 mask = SCB_GET_TARGET_MASK(ahd, scb); 1608 1609 if ((ahd->user_discenable & mask) != 0) 1610 hscb->control |= DISCENB; 1611 1612 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1613 scb->flags |= SCB_PACKETIZED; 1614 1615 if ((tstate->auto_negotiate & mask) != 0) { 1616 scb->flags |= SCB_AUTO_NEGOTIATE; 1617 scb->hscb->control |= MK_MESSAGE; 1618 } 1619 1620 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1621 int msg_bytes; 1622 uint8_t tag_msgs[2]; 1623 1624 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1625 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1626 hscb->control |= tag_msgs[0]; 1627 if (tag_msgs[0] == MSG_ORDERED_TASK) 1628 dev->commands_since_idle_or_otag = 0; 1629 } else 1630 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1631 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1632 hscb->control |= MSG_ORDERED_TASK; 1633 dev->commands_since_idle_or_otag = 0; 1634 } else { 1635 hscb->control |= MSG_SIMPLE_TASK; 1636 } 1637 } 1638 1639 hscb->cdb_len = cmd->cmd_len; 1640 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1641 1642 scb->platform_data->xfer_len = 0; 1643 ahd_set_residual(scb, 0); 1644 ahd_set_sense_residual(scb, 0); 1645 scb->sg_count = 0; 1646 1647 if (nseg > 0) { 1648 void *sg = scb->sg_list; 1649 struct scatterlist *cur_seg; 1650 int i; 1651 1652 scb->platform_data->xfer_len = 0; 1653 1654 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1655 dma_addr_t addr; 1656 bus_size_t len; 1657 1658 addr = sg_dma_address(cur_seg); 1659 len = sg_dma_len(cur_seg); 1660 scb->platform_data->xfer_len += len; 1661 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1662 i == (nseg - 1)); 1663 } 1664 } 1665 1666 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1667 dev->openings--; 1668 dev->active++; 1669 dev->commands_issued++; 1670 1671 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1672 dev->commands_since_idle_or_otag++; 1673 scb->flags |= SCB_ACTIVE; 1674 ahd_queue_scb(ahd, scb); 1675 1676 ahd_unlock(ahd, &flags); 1677 1678 return 0; 1679 } 1680 1681 /* 1682 * SCSI controller interrupt handler. 1683 */ 1684 irqreturn_t 1685 ahd_linux_isr(int irq, void *dev_id) 1686 { 1687 struct ahd_softc *ahd; 1688 u_long flags; 1689 int ours; 1690 1691 ahd = (struct ahd_softc *) dev_id; 1692 ahd_lock(ahd, &flags); 1693 ours = ahd_intr(ahd); 1694 ahd_unlock(ahd, &flags); 1695 return IRQ_RETVAL(ours); 1696 } 1697 1698 void 1699 ahd_send_async(struct ahd_softc *ahd, char channel, 1700 u_int target, u_int lun, ac_code code) 1701 { 1702 switch (code) { 1703 case AC_TRANSFER_NEG: 1704 { 1705 char buf[80]; 1706 struct scsi_target *starget; 1707 struct info_str info; 1708 struct ahd_initiator_tinfo *tinfo; 1709 struct ahd_tmode_tstate *tstate; 1710 unsigned int target_ppr_options; 1711 1712 BUG_ON(target == CAM_TARGET_WILDCARD); 1713 1714 info.buffer = buf; 1715 info.length = sizeof(buf); 1716 info.offset = 0; 1717 info.pos = 0; 1718 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1719 target, &tstate); 1720 1721 /* 1722 * Don't bother reporting results while 1723 * negotiations are still pending. 1724 */ 1725 if (tinfo->curr.period != tinfo->goal.period 1726 || tinfo->curr.width != tinfo->goal.width 1727 || tinfo->curr.offset != tinfo->goal.offset 1728 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1729 if (bootverbose == 0) 1730 break; 1731 1732 /* 1733 * Don't bother reporting results that 1734 * are identical to those last reported. 1735 */ 1736 starget = ahd->platform_data->starget[target]; 1737 if (starget == NULL) 1738 break; 1739 1740 target_ppr_options = 1741 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1742 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1743 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1744 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1745 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1746 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1747 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1748 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1749 1750 if (tinfo->curr.period == spi_period(starget) 1751 && tinfo->curr.width == spi_width(starget) 1752 && tinfo->curr.offset == spi_offset(starget) 1753 && tinfo->curr.ppr_options == target_ppr_options) 1754 if (bootverbose == 0) 1755 break; 1756 1757 spi_period(starget) = tinfo->curr.period; 1758 spi_width(starget) = tinfo->curr.width; 1759 spi_offset(starget) = tinfo->curr.offset; 1760 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1761 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1762 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1763 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1764 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1765 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1766 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1767 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1768 spi_display_xfer_agreement(starget); 1769 break; 1770 } 1771 case AC_SENT_BDR: 1772 { 1773 WARN_ON(lun != CAM_LUN_WILDCARD); 1774 scsi_report_device_reset(ahd->platform_data->host, 1775 channel - 'A', target); 1776 break; 1777 } 1778 case AC_BUS_RESET: 1779 if (ahd->platform_data->host != NULL) { 1780 scsi_report_bus_reset(ahd->platform_data->host, 1781 channel - 'A'); 1782 } 1783 break; 1784 default: 1785 panic("ahd_send_async: Unexpected async event"); 1786 } 1787 } 1788 1789 /* 1790 * Calls the higher level scsi done function and frees the scb. 1791 */ 1792 void 1793 ahd_done(struct ahd_softc *ahd, struct scb *scb) 1794 { 1795 struct scsi_cmnd *cmd; 1796 struct ahd_linux_device *dev; 1797 1798 if ((scb->flags & SCB_ACTIVE) == 0) { 1799 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1800 ahd_dump_card_state(ahd); 1801 panic("Stopping for safety"); 1802 } 1803 LIST_REMOVE(scb, pending_links); 1804 cmd = scb->io_ctx; 1805 dev = scb->platform_data->dev; 1806 dev->active--; 1807 dev->openings++; 1808 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1809 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1810 dev->qfrozen--; 1811 } 1812 ahd_linux_unmap_scb(ahd, scb); 1813 1814 /* 1815 * Guard against stale sense data. 1816 * The Linux mid-layer assumes that sense 1817 * was retrieved anytime the first byte of 1818 * the sense buffer looks "sane". 1819 */ 1820 cmd->sense_buffer[0] = 0; 1821 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1822 uint32_t amount_xferred; 1823 1824 amount_xferred = 1825 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1826 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1827 #ifdef AHD_DEBUG 1828 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1829 ahd_print_path(ahd, scb); 1830 printk("Set CAM_UNCOR_PARITY\n"); 1831 } 1832 #endif 1833 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1834 #ifdef AHD_REPORT_UNDERFLOWS 1835 /* 1836 * This code is disabled by default as some 1837 * clients of the SCSI system do not properly 1838 * initialize the underflow parameter. This 1839 * results in spurious termination of commands 1840 * that complete as expected (e.g. underflow is 1841 * allowed as command can return variable amounts 1842 * of data. 1843 */ 1844 } else if (amount_xferred < scb->io_ctx->underflow) { 1845 u_int i; 1846 1847 ahd_print_path(ahd, scb); 1848 printk("CDB:"); 1849 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1850 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1851 printk("\n"); 1852 ahd_print_path(ahd, scb); 1853 printk("Saw underflow (%ld of %ld bytes). " 1854 "Treated as error\n", 1855 ahd_get_residual(scb), 1856 ahd_get_transfer_length(scb)); 1857 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1858 #endif 1859 } else { 1860 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1861 } 1862 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1863 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1864 } 1865 1866 if (dev->openings == 1 1867 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1868 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1869 dev->tag_success_count++; 1870 /* 1871 * Some devices deal with temporary internal resource 1872 * shortages by returning queue full. When the queue 1873 * full occurrs, we throttle back. Slowly try to get 1874 * back to our previous queue depth. 1875 */ 1876 if ((dev->openings + dev->active) < dev->maxtags 1877 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1878 dev->tag_success_count = 0; 1879 dev->openings++; 1880 } 1881 1882 if (dev->active == 0) 1883 dev->commands_since_idle_or_otag = 0; 1884 1885 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1886 printk("Recovery SCB completes\n"); 1887 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1888 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1889 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1890 1891 if (ahd->platform_data->eh_done) 1892 complete(ahd->platform_data->eh_done); 1893 } 1894 1895 ahd_free_scb(ahd, scb); 1896 ahd_linux_queue_cmd_complete(ahd, cmd); 1897 } 1898 1899 static void 1900 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1901 struct scsi_device *sdev, struct scb *scb) 1902 { 1903 struct ahd_devinfo devinfo; 1904 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1905 1906 ahd_compile_devinfo(&devinfo, 1907 ahd->our_id, 1908 sdev->sdev_target->id, sdev->lun, 1909 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1910 ROLE_INITIATOR); 1911 1912 /* 1913 * We don't currently trust the mid-layer to 1914 * properly deal with queue full or busy. So, 1915 * when one occurs, we tell the mid-layer to 1916 * unconditionally requeue the command to us 1917 * so that we can retry it ourselves. We also 1918 * implement our own throttling mechanism so 1919 * we don't clobber the device with too many 1920 * commands. 1921 */ 1922 switch (ahd_get_scsi_status(scb)) { 1923 default: 1924 break; 1925 case SCSI_STATUS_CHECK_COND: 1926 case SCSI_STATUS_CMD_TERMINATED: 1927 { 1928 struct scsi_cmnd *cmd; 1929 1930 /* 1931 * Copy sense information to the OS's cmd 1932 * structure if it is available. 1933 */ 1934 cmd = scb->io_ctx; 1935 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1936 struct scsi_status_iu_header *siu; 1937 u_int sense_size; 1938 u_int sense_offset; 1939 1940 if (scb->flags & SCB_SENSE) { 1941 sense_size = min(sizeof(struct scsi_sense_data) 1942 - ahd_get_sense_residual(scb), 1943 (u_long)SCSI_SENSE_BUFFERSIZE); 1944 sense_offset = 0; 1945 } else { 1946 /* 1947 * Copy only the sense data into the provided 1948 * buffer. 1949 */ 1950 siu = (struct scsi_status_iu_header *) 1951 scb->sense_data; 1952 sense_size = min_t(size_t, 1953 scsi_4btoul(siu->sense_length), 1954 SCSI_SENSE_BUFFERSIZE); 1955 sense_offset = SIU_SENSE_OFFSET(siu); 1956 } 1957 1958 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1959 memcpy(cmd->sense_buffer, 1960 ahd_get_sense_buf(ahd, scb) 1961 + sense_offset, sense_size); 1962 cmd->result |= (DRIVER_SENSE << 24); 1963 1964 #ifdef AHD_DEBUG 1965 if (ahd_debug & AHD_SHOW_SENSE) { 1966 int i; 1967 1968 printk("Copied %d bytes of sense data at %d:", 1969 sense_size, sense_offset); 1970 for (i = 0; i < sense_size; i++) { 1971 if ((i & 0xF) == 0) 1972 printk("\n"); 1973 printk("0x%x ", cmd->sense_buffer[i]); 1974 } 1975 printk("\n"); 1976 } 1977 #endif 1978 } 1979 break; 1980 } 1981 case SCSI_STATUS_QUEUE_FULL: 1982 /* 1983 * By the time the core driver has returned this 1984 * command, all other commands that were queued 1985 * to us but not the device have been returned. 1986 * This ensures that dev->active is equal to 1987 * the number of commands actually queued to 1988 * the device. 1989 */ 1990 dev->tag_success_count = 0; 1991 if (dev->active != 0) { 1992 /* 1993 * Drop our opening count to the number 1994 * of commands currently outstanding. 1995 */ 1996 dev->openings = 0; 1997 #ifdef AHD_DEBUG 1998 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1999 ahd_print_path(ahd, scb); 2000 printk("Dropping tag count to %d\n", 2001 dev->active); 2002 } 2003 #endif 2004 if (dev->active == dev->tags_on_last_queuefull) { 2005 2006 dev->last_queuefull_same_count++; 2007 /* 2008 * If we repeatedly see a queue full 2009 * at the same queue depth, this 2010 * device has a fixed number of tag 2011 * slots. Lock in this tag depth 2012 * so we stop seeing queue fulls from 2013 * this device. 2014 */ 2015 if (dev->last_queuefull_same_count 2016 == AHD_LOCK_TAGS_COUNT) { 2017 dev->maxtags = dev->active; 2018 ahd_print_path(ahd, scb); 2019 printk("Locking max tag count at %d\n", 2020 dev->active); 2021 } 2022 } else { 2023 dev->tags_on_last_queuefull = dev->active; 2024 dev->last_queuefull_same_count = 0; 2025 } 2026 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 2027 ahd_set_scsi_status(scb, SCSI_STATUS_OK); 2028 ahd_platform_set_tags(ahd, sdev, &devinfo, 2029 (dev->flags & AHD_DEV_Q_BASIC) 2030 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2031 break; 2032 } 2033 /* 2034 * Drop down to a single opening, and treat this 2035 * as if the target returned BUSY SCSI status. 2036 */ 2037 dev->openings = 1; 2038 ahd_platform_set_tags(ahd, sdev, &devinfo, 2039 (dev->flags & AHD_DEV_Q_BASIC) 2040 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2041 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); 2042 } 2043 } 2044 2045 static void 2046 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 2047 { 2048 int status; 2049 int new_status = DID_OK; 2050 int do_fallback = 0; 2051 int scsi_status; 2052 2053 /* 2054 * Map CAM error codes into Linux Error codes. We 2055 * avoid the conversion so that the DV code has the 2056 * full error information available when making 2057 * state change decisions. 2058 */ 2059 2060 status = ahd_cmd_get_transaction_status(cmd); 2061 switch (status) { 2062 case CAM_REQ_INPROG: 2063 case CAM_REQ_CMP: 2064 new_status = DID_OK; 2065 break; 2066 case CAM_AUTOSENSE_FAIL: 2067 new_status = DID_ERROR; 2068 /* Fallthrough */ 2069 case CAM_SCSI_STATUS_ERROR: 2070 scsi_status = ahd_cmd_get_scsi_status(cmd); 2071 2072 switch(scsi_status) { 2073 case SCSI_STATUS_CMD_TERMINATED: 2074 case SCSI_STATUS_CHECK_COND: 2075 if ((cmd->result >> 24) != DRIVER_SENSE) { 2076 do_fallback = 1; 2077 } else { 2078 struct scsi_sense_data *sense; 2079 2080 sense = (struct scsi_sense_data *) 2081 cmd->sense_buffer; 2082 if (sense->extra_len >= 5 && 2083 (sense->add_sense_code == 0x47 2084 || sense->add_sense_code == 0x48)) 2085 do_fallback = 1; 2086 } 2087 break; 2088 default: 2089 break; 2090 } 2091 break; 2092 case CAM_REQ_ABORTED: 2093 new_status = DID_ABORT; 2094 break; 2095 case CAM_BUSY: 2096 new_status = DID_BUS_BUSY; 2097 break; 2098 case CAM_REQ_INVALID: 2099 case CAM_PATH_INVALID: 2100 new_status = DID_BAD_TARGET; 2101 break; 2102 case CAM_SEL_TIMEOUT: 2103 new_status = DID_NO_CONNECT; 2104 break; 2105 case CAM_SCSI_BUS_RESET: 2106 case CAM_BDR_SENT: 2107 new_status = DID_RESET; 2108 break; 2109 case CAM_UNCOR_PARITY: 2110 new_status = DID_PARITY; 2111 do_fallback = 1; 2112 break; 2113 case CAM_CMD_TIMEOUT: 2114 new_status = DID_TIME_OUT; 2115 do_fallback = 1; 2116 break; 2117 case CAM_REQ_CMP_ERR: 2118 case CAM_UNEXP_BUSFREE: 2119 case CAM_DATA_RUN_ERR: 2120 new_status = DID_ERROR; 2121 do_fallback = 1; 2122 break; 2123 case CAM_UA_ABORT: 2124 case CAM_NO_HBA: 2125 case CAM_SEQUENCE_FAIL: 2126 case CAM_CCB_LEN_ERR: 2127 case CAM_PROVIDE_FAIL: 2128 case CAM_REQ_TERMIO: 2129 case CAM_UNREC_HBA_ERROR: 2130 case CAM_REQ_TOO_BIG: 2131 new_status = DID_ERROR; 2132 break; 2133 case CAM_REQUEUE_REQ: 2134 new_status = DID_REQUEUE; 2135 break; 2136 default: 2137 /* We should never get here */ 2138 new_status = DID_ERROR; 2139 break; 2140 } 2141 2142 if (do_fallback) { 2143 printk("%s: device overrun (status %x) on %d:%d:%d\n", 2144 ahd_name(ahd), status, cmd->device->channel, 2145 cmd->device->id, cmd->device->lun); 2146 } 2147 2148 ahd_cmd_set_transaction_status(cmd, new_status); 2149 2150 cmd->scsi_done(cmd); 2151 } 2152 2153 static void 2154 ahd_freeze_simq(struct ahd_softc *ahd) 2155 { 2156 scsi_block_requests(ahd->platform_data->host); 2157 } 2158 2159 static void 2160 ahd_release_simq(struct ahd_softc *ahd) 2161 { 2162 scsi_unblock_requests(ahd->platform_data->host); 2163 } 2164 2165 static int 2166 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2167 { 2168 struct ahd_softc *ahd; 2169 struct ahd_linux_device *dev; 2170 struct scb *pending_scb; 2171 u_int saved_scbptr; 2172 u_int active_scbptr; 2173 u_int last_phase; 2174 u_int saved_scsiid; 2175 u_int cdb_byte; 2176 int retval; 2177 int was_paused; 2178 int paused; 2179 int wait; 2180 int disconnected; 2181 ahd_mode_state saved_modes; 2182 unsigned long flags; 2183 2184 pending_scb = NULL; 2185 paused = FALSE; 2186 wait = FALSE; 2187 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2188 2189 scmd_printk(KERN_INFO, cmd, 2190 "Attempting to queue an ABORT message:"); 2191 2192 printk("CDB:"); 2193 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2194 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2195 printk("\n"); 2196 2197 ahd_lock(ahd, &flags); 2198 2199 /* 2200 * First determine if we currently own this command. 2201 * Start by searching the device queue. If not found 2202 * there, check the pending_scb list. If not found 2203 * at all, and the system wanted us to just abort the 2204 * command, return success. 2205 */ 2206 dev = scsi_transport_device_data(cmd->device); 2207 2208 if (dev == NULL) { 2209 /* 2210 * No target device for this command exists, 2211 * so we must not still own the command. 2212 */ 2213 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2214 retval = SUCCESS; 2215 goto no_cmd; 2216 } 2217 2218 /* 2219 * See if we can find a matching cmd in the pending list. 2220 */ 2221 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2222 if (pending_scb->io_ctx == cmd) 2223 break; 2224 } 2225 2226 if (pending_scb == NULL) { 2227 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2228 goto no_cmd; 2229 } 2230 2231 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2232 /* 2233 * We can't queue two recovery actions using the same SCB 2234 */ 2235 retval = FAILED; 2236 goto done; 2237 } 2238 2239 /* 2240 * Ensure that the card doesn't do anything 2241 * behind our back. Also make sure that we 2242 * didn't "just" miss an interrupt that would 2243 * affect this cmd. 2244 */ 2245 was_paused = ahd_is_paused(ahd); 2246 ahd_pause_and_flushwork(ahd); 2247 paused = TRUE; 2248 2249 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2250 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2251 goto no_cmd; 2252 } 2253 2254 printk("%s: At time of recovery, card was %spaused\n", 2255 ahd_name(ahd), was_paused ? "" : "not "); 2256 ahd_dump_card_state(ahd); 2257 2258 disconnected = TRUE; 2259 if (ahd_search_qinfifo(ahd, cmd->device->id, 2260 cmd->device->channel + 'A', 2261 cmd->device->lun, 2262 pending_scb->hscb->tag, 2263 ROLE_INITIATOR, CAM_REQ_ABORTED, 2264 SEARCH_COMPLETE) > 0) { 2265 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2266 ahd_name(ahd), cmd->device->channel, 2267 cmd->device->id, cmd->device->lun); 2268 retval = SUCCESS; 2269 goto done; 2270 } 2271 2272 saved_modes = ahd_save_modes(ahd); 2273 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2274 last_phase = ahd_inb(ahd, LASTPHASE); 2275 saved_scbptr = ahd_get_scbptr(ahd); 2276 active_scbptr = saved_scbptr; 2277 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2278 struct scb *bus_scb; 2279 2280 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2281 if (bus_scb == pending_scb) 2282 disconnected = FALSE; 2283 } 2284 2285 /* 2286 * At this point, pending_scb is the scb associated with the 2287 * passed in command. That command is currently active on the 2288 * bus or is in the disconnected state. 2289 */ 2290 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); 2291 if (last_phase != P_BUSFREE 2292 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2293 2294 /* 2295 * We're active on the bus, so assert ATN 2296 * and hope that the target responds. 2297 */ 2298 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2299 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2300 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2301 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2302 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2303 wait = TRUE; 2304 } else if (disconnected) { 2305 2306 /* 2307 * Actually re-queue this SCB in an attempt 2308 * to select the device before it reconnects. 2309 */ 2310 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2311 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2312 pending_scb->hscb->cdb_len = 0; 2313 pending_scb->hscb->task_attribute = 0; 2314 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2315 2316 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2317 /* 2318 * Mark the SCB has having an outstanding 2319 * task management function. Should the command 2320 * complete normally before the task management 2321 * function can be sent, the host will be notified 2322 * to abort our requeued SCB. 2323 */ 2324 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2325 pending_scb->hscb->task_management); 2326 } else { 2327 /* 2328 * If non-packetized, set the MK_MESSAGE control 2329 * bit indicating that we desire to send a message. 2330 * We also set the disconnected flag since there is 2331 * no guarantee that our SCB control byte matches 2332 * the version on the card. We don't want the 2333 * sequencer to abort the command thinking an 2334 * unsolicited reselection occurred. 2335 */ 2336 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2337 2338 /* 2339 * The sequencer will never re-reference the 2340 * in-core SCB. To make sure we are notified 2341 * during reselection, set the MK_MESSAGE flag in 2342 * the card's copy of the SCB. 2343 */ 2344 ahd_outb(ahd, SCB_CONTROL, 2345 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2346 } 2347 2348 /* 2349 * Clear out any entries in the QINFIFO first 2350 * so we are the next SCB for this target 2351 * to run. 2352 */ 2353 ahd_search_qinfifo(ahd, cmd->device->id, 2354 cmd->device->channel + 'A', cmd->device->lun, 2355 SCB_LIST_NULL, ROLE_INITIATOR, 2356 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2357 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2358 ahd_set_scbptr(ahd, saved_scbptr); 2359 ahd_print_path(ahd, pending_scb); 2360 printk("Device is disconnected, re-queuing SCB\n"); 2361 wait = TRUE; 2362 } else { 2363 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2364 retval = FAILED; 2365 goto done; 2366 } 2367 2368 no_cmd: 2369 /* 2370 * Our assumption is that if we don't have the command, no 2371 * recovery action was required, so we return success. Again, 2372 * the semantics of the mid-layer recovery engine are not 2373 * well defined, so this may change in time. 2374 */ 2375 retval = SUCCESS; 2376 done: 2377 if (paused) 2378 ahd_unpause(ahd); 2379 if (wait) { 2380 DECLARE_COMPLETION_ONSTACK(done); 2381 2382 ahd->platform_data->eh_done = &done; 2383 ahd_unlock(ahd, &flags); 2384 2385 printk("%s: Recovery code sleeping\n", ahd_name(ahd)); 2386 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2387 ahd_lock(ahd, &flags); 2388 ahd->platform_data->eh_done = NULL; 2389 ahd_unlock(ahd, &flags); 2390 printk("%s: Timer Expired (active %d)\n", 2391 ahd_name(ahd), dev->active); 2392 retval = FAILED; 2393 } 2394 printk("Recovery code awake\n"); 2395 } else 2396 ahd_unlock(ahd, &flags); 2397 2398 if (retval != SUCCESS) 2399 printk("%s: Command abort returning 0x%x\n", 2400 ahd_name(ahd), retval); 2401 2402 return retval; 2403 } 2404 2405 static void ahd_linux_set_width(struct scsi_target *starget, int width) 2406 { 2407 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2408 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2409 struct ahd_devinfo devinfo; 2410 unsigned long flags; 2411 2412 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2413 starget->channel + 'A', ROLE_INITIATOR); 2414 ahd_lock(ahd, &flags); 2415 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2416 ahd_unlock(ahd, &flags); 2417 } 2418 2419 static void ahd_linux_set_period(struct scsi_target *starget, int period) 2420 { 2421 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2422 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2423 struct ahd_tmode_tstate *tstate; 2424 struct ahd_initiator_tinfo *tinfo 2425 = ahd_fetch_transinfo(ahd, 2426 starget->channel + 'A', 2427 shost->this_id, starget->id, &tstate); 2428 struct ahd_devinfo devinfo; 2429 unsigned int ppr_options = tinfo->goal.ppr_options; 2430 unsigned int dt; 2431 unsigned long flags; 2432 unsigned long offset = tinfo->goal.offset; 2433 2434 #ifdef AHD_DEBUG 2435 if ((ahd_debug & AHD_SHOW_DV) != 0) 2436 printk("%s: set period to %d\n", ahd_name(ahd), period); 2437 #endif 2438 if (offset == 0) 2439 offset = MAX_OFFSET; 2440 2441 if (period < 8) 2442 period = 8; 2443 if (period < 10) { 2444 if (spi_max_width(starget)) { 2445 ppr_options |= MSG_EXT_PPR_DT_REQ; 2446 if (period == 8) 2447 ppr_options |= MSG_EXT_PPR_IU_REQ; 2448 } else 2449 period = 10; 2450 } 2451 2452 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2453 2454 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2455 starget->channel + 'A', ROLE_INITIATOR); 2456 2457 /* all PPR requests apart from QAS require wide transfers */ 2458 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2459 if (spi_width(starget) == 0) 2460 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2461 } 2462 2463 ahd_find_syncrate(ahd, &period, &ppr_options, 2464 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2465 2466 ahd_lock(ahd, &flags); 2467 ahd_set_syncrate(ahd, &devinfo, period, offset, 2468 ppr_options, AHD_TRANS_GOAL, FALSE); 2469 ahd_unlock(ahd, &flags); 2470 } 2471 2472 static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2473 { 2474 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2475 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2476 struct ahd_tmode_tstate *tstate; 2477 struct ahd_initiator_tinfo *tinfo 2478 = ahd_fetch_transinfo(ahd, 2479 starget->channel + 'A', 2480 shost->this_id, starget->id, &tstate); 2481 struct ahd_devinfo devinfo; 2482 unsigned int ppr_options = 0; 2483 unsigned int period = 0; 2484 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2485 unsigned long flags; 2486 2487 #ifdef AHD_DEBUG 2488 if ((ahd_debug & AHD_SHOW_DV) != 0) 2489 printk("%s: set offset to %d\n", ahd_name(ahd), offset); 2490 #endif 2491 2492 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2493 starget->channel + 'A', ROLE_INITIATOR); 2494 if (offset != 0) { 2495 period = tinfo->goal.period; 2496 ppr_options = tinfo->goal.ppr_options; 2497 ahd_find_syncrate(ahd, &period, &ppr_options, 2498 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2499 } 2500 2501 ahd_lock(ahd, &flags); 2502 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2503 AHD_TRANS_GOAL, FALSE); 2504 ahd_unlock(ahd, &flags); 2505 } 2506 2507 static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2508 { 2509 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2510 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2511 struct ahd_tmode_tstate *tstate; 2512 struct ahd_initiator_tinfo *tinfo 2513 = ahd_fetch_transinfo(ahd, 2514 starget->channel + 'A', 2515 shost->this_id, starget->id, &tstate); 2516 struct ahd_devinfo devinfo; 2517 unsigned int ppr_options = tinfo->goal.ppr_options 2518 & ~MSG_EXT_PPR_DT_REQ; 2519 unsigned int period = tinfo->goal.period; 2520 unsigned int width = tinfo->goal.width; 2521 unsigned long flags; 2522 2523 #ifdef AHD_DEBUG 2524 if ((ahd_debug & AHD_SHOW_DV) != 0) 2525 printk("%s: %s DT\n", ahd_name(ahd), 2526 dt ? "enabling" : "disabling"); 2527 #endif 2528 if (dt && spi_max_width(starget)) { 2529 ppr_options |= MSG_EXT_PPR_DT_REQ; 2530 if (!width) 2531 ahd_linux_set_width(starget, 1); 2532 } else { 2533 if (period <= 9) 2534 period = 10; /* If resetting DT, period must be >= 25ns */ 2535 /* IU is invalid without DT set */ 2536 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2537 } 2538 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2539 starget->channel + 'A', ROLE_INITIATOR); 2540 ahd_find_syncrate(ahd, &period, &ppr_options, 2541 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2542 2543 ahd_lock(ahd, &flags); 2544 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2545 ppr_options, AHD_TRANS_GOAL, FALSE); 2546 ahd_unlock(ahd, &flags); 2547 } 2548 2549 static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2550 { 2551 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2552 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2553 struct ahd_tmode_tstate *tstate; 2554 struct ahd_initiator_tinfo *tinfo 2555 = ahd_fetch_transinfo(ahd, 2556 starget->channel + 'A', 2557 shost->this_id, starget->id, &tstate); 2558 struct ahd_devinfo devinfo; 2559 unsigned int ppr_options = tinfo->goal.ppr_options 2560 & ~MSG_EXT_PPR_QAS_REQ; 2561 unsigned int period = tinfo->goal.period; 2562 unsigned int dt; 2563 unsigned long flags; 2564 2565 #ifdef AHD_DEBUG 2566 if ((ahd_debug & AHD_SHOW_DV) != 0) 2567 printk("%s: %s QAS\n", ahd_name(ahd), 2568 qas ? "enabling" : "disabling"); 2569 #endif 2570 2571 if (qas) { 2572 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2573 } 2574 2575 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2576 2577 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2578 starget->channel + 'A', ROLE_INITIATOR); 2579 ahd_find_syncrate(ahd, &period, &ppr_options, 2580 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2581 2582 ahd_lock(ahd, &flags); 2583 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2584 ppr_options, AHD_TRANS_GOAL, FALSE); 2585 ahd_unlock(ahd, &flags); 2586 } 2587 2588 static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 2589 { 2590 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2591 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2592 struct ahd_tmode_tstate *tstate; 2593 struct ahd_initiator_tinfo *tinfo 2594 = ahd_fetch_transinfo(ahd, 2595 starget->channel + 'A', 2596 shost->this_id, starget->id, &tstate); 2597 struct ahd_devinfo devinfo; 2598 unsigned int ppr_options = tinfo->goal.ppr_options 2599 & ~MSG_EXT_PPR_IU_REQ; 2600 unsigned int period = tinfo->goal.period; 2601 unsigned int dt; 2602 unsigned long flags; 2603 2604 #ifdef AHD_DEBUG 2605 if ((ahd_debug & AHD_SHOW_DV) != 0) 2606 printk("%s: %s IU\n", ahd_name(ahd), 2607 iu ? "enabling" : "disabling"); 2608 #endif 2609 2610 if (iu && spi_max_width(starget)) { 2611 ppr_options |= MSG_EXT_PPR_IU_REQ; 2612 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2613 } 2614 2615 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2616 2617 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2618 starget->channel + 'A', ROLE_INITIATOR); 2619 ahd_find_syncrate(ahd, &period, &ppr_options, 2620 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2621 2622 ahd_lock(ahd, &flags); 2623 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2624 ppr_options, AHD_TRANS_GOAL, FALSE); 2625 ahd_unlock(ahd, &flags); 2626 } 2627 2628 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2629 { 2630 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2631 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2632 struct ahd_tmode_tstate *tstate; 2633 struct ahd_initiator_tinfo *tinfo 2634 = ahd_fetch_transinfo(ahd, 2635 starget->channel + 'A', 2636 shost->this_id, starget->id, &tstate); 2637 struct ahd_devinfo devinfo; 2638 unsigned int ppr_options = tinfo->goal.ppr_options 2639 & ~MSG_EXT_PPR_RD_STRM; 2640 unsigned int period = tinfo->goal.period; 2641 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2642 unsigned long flags; 2643 2644 #ifdef AHD_DEBUG 2645 if ((ahd_debug & AHD_SHOW_DV) != 0) 2646 printk("%s: %s Read Streaming\n", ahd_name(ahd), 2647 rdstrm ? "enabling" : "disabling"); 2648 #endif 2649 2650 if (rdstrm && spi_max_width(starget)) 2651 ppr_options |= MSG_EXT_PPR_RD_STRM; 2652 2653 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2654 starget->channel + 'A', ROLE_INITIATOR); 2655 ahd_find_syncrate(ahd, &period, &ppr_options, 2656 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2657 2658 ahd_lock(ahd, &flags); 2659 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2660 ppr_options, AHD_TRANS_GOAL, FALSE); 2661 ahd_unlock(ahd, &flags); 2662 } 2663 2664 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2665 { 2666 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2667 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2668 struct ahd_tmode_tstate *tstate; 2669 struct ahd_initiator_tinfo *tinfo 2670 = ahd_fetch_transinfo(ahd, 2671 starget->channel + 'A', 2672 shost->this_id, starget->id, &tstate); 2673 struct ahd_devinfo devinfo; 2674 unsigned int ppr_options = tinfo->goal.ppr_options 2675 & ~MSG_EXT_PPR_WR_FLOW; 2676 unsigned int period = tinfo->goal.period; 2677 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2678 unsigned long flags; 2679 2680 #ifdef AHD_DEBUG 2681 if ((ahd_debug & AHD_SHOW_DV) != 0) 2682 printk("%s: %s Write Flow Control\n", ahd_name(ahd), 2683 wrflow ? "enabling" : "disabling"); 2684 #endif 2685 2686 if (wrflow && spi_max_width(starget)) 2687 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2688 2689 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2690 starget->channel + 'A', ROLE_INITIATOR); 2691 ahd_find_syncrate(ahd, &period, &ppr_options, 2692 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2693 2694 ahd_lock(ahd, &flags); 2695 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2696 ppr_options, AHD_TRANS_GOAL, FALSE); 2697 ahd_unlock(ahd, &flags); 2698 } 2699 2700 static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2701 { 2702 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2703 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2704 struct ahd_tmode_tstate *tstate; 2705 struct ahd_initiator_tinfo *tinfo 2706 = ahd_fetch_transinfo(ahd, 2707 starget->channel + 'A', 2708 shost->this_id, starget->id, &tstate); 2709 struct ahd_devinfo devinfo; 2710 unsigned int ppr_options = tinfo->goal.ppr_options 2711 & ~MSG_EXT_PPR_RTI; 2712 unsigned int period = tinfo->goal.period; 2713 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2714 unsigned long flags; 2715 2716 if ((ahd->features & AHD_RTI) == 0) { 2717 #ifdef AHD_DEBUG 2718 if ((ahd_debug & AHD_SHOW_DV) != 0) 2719 printk("%s: RTI not available\n", ahd_name(ahd)); 2720 #endif 2721 return; 2722 } 2723 2724 #ifdef AHD_DEBUG 2725 if ((ahd_debug & AHD_SHOW_DV) != 0) 2726 printk("%s: %s RTI\n", ahd_name(ahd), 2727 rti ? "enabling" : "disabling"); 2728 #endif 2729 2730 if (rti && spi_max_width(starget)) 2731 ppr_options |= MSG_EXT_PPR_RTI; 2732 2733 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2734 starget->channel + 'A', ROLE_INITIATOR); 2735 ahd_find_syncrate(ahd, &period, &ppr_options, 2736 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2737 2738 ahd_lock(ahd, &flags); 2739 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2740 ppr_options, AHD_TRANS_GOAL, FALSE); 2741 ahd_unlock(ahd, &flags); 2742 } 2743 2744 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2745 { 2746 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2747 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2748 struct ahd_tmode_tstate *tstate; 2749 struct ahd_initiator_tinfo *tinfo 2750 = ahd_fetch_transinfo(ahd, 2751 starget->channel + 'A', 2752 shost->this_id, starget->id, &tstate); 2753 struct ahd_devinfo devinfo; 2754 unsigned int ppr_options = tinfo->goal.ppr_options 2755 & ~MSG_EXT_PPR_PCOMP_EN; 2756 unsigned int period = tinfo->goal.period; 2757 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2758 unsigned long flags; 2759 2760 #ifdef AHD_DEBUG 2761 if ((ahd_debug & AHD_SHOW_DV) != 0) 2762 printk("%s: %s Precompensation\n", ahd_name(ahd), 2763 pcomp ? "Enable" : "Disable"); 2764 #endif 2765 2766 if (pcomp && spi_max_width(starget)) { 2767 uint8_t precomp; 2768 2769 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 2770 const struct ahd_linux_iocell_opts *iocell_opts; 2771 2772 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2773 precomp = iocell_opts->precomp; 2774 } else { 2775 precomp = AIC79XX_DEFAULT_PRECOMP; 2776 } 2777 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2778 AHD_SET_PRECOMP(ahd, precomp); 2779 } else { 2780 AHD_SET_PRECOMP(ahd, 0); 2781 } 2782 2783 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2784 starget->channel + 'A', ROLE_INITIATOR); 2785 ahd_find_syncrate(ahd, &period, &ppr_options, 2786 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2787 2788 ahd_lock(ahd, &flags); 2789 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2790 ppr_options, AHD_TRANS_GOAL, FALSE); 2791 ahd_unlock(ahd, &flags); 2792 } 2793 2794 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2795 { 2796 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2797 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2798 struct ahd_tmode_tstate *tstate; 2799 struct ahd_initiator_tinfo *tinfo 2800 = ahd_fetch_transinfo(ahd, 2801 starget->channel + 'A', 2802 shost->this_id, starget->id, &tstate); 2803 struct ahd_devinfo devinfo; 2804 unsigned int ppr_options = tinfo->goal.ppr_options 2805 & ~MSG_EXT_PPR_HOLD_MCS; 2806 unsigned int period = tinfo->goal.period; 2807 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2808 unsigned long flags; 2809 2810 if (hold && spi_max_width(starget)) 2811 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2812 2813 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2814 starget->channel + 'A', ROLE_INITIATOR); 2815 ahd_find_syncrate(ahd, &period, &ppr_options, 2816 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2817 2818 ahd_lock(ahd, &flags); 2819 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2820 ppr_options, AHD_TRANS_GOAL, FALSE); 2821 ahd_unlock(ahd, &flags); 2822 } 2823 2824 static void ahd_linux_get_signalling(struct Scsi_Host *shost) 2825 { 2826 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; 2827 unsigned long flags; 2828 u8 mode; 2829 2830 ahd_lock(ahd, &flags); 2831 ahd_pause(ahd); 2832 mode = ahd_inb(ahd, SBLKCTL); 2833 ahd_unpause(ahd); 2834 ahd_unlock(ahd, &flags); 2835 2836 if (mode & ENAB40) 2837 spi_signalling(shost) = SPI_SIGNAL_LVD; 2838 else if (mode & ENAB20) 2839 spi_signalling(shost) = SPI_SIGNAL_SE; 2840 else 2841 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2842 } 2843 2844 static struct spi_function_template ahd_linux_transport_functions = { 2845 .set_offset = ahd_linux_set_offset, 2846 .show_offset = 1, 2847 .set_period = ahd_linux_set_period, 2848 .show_period = 1, 2849 .set_width = ahd_linux_set_width, 2850 .show_width = 1, 2851 .set_dt = ahd_linux_set_dt, 2852 .show_dt = 1, 2853 .set_iu = ahd_linux_set_iu, 2854 .show_iu = 1, 2855 .set_qas = ahd_linux_set_qas, 2856 .show_qas = 1, 2857 .set_rd_strm = ahd_linux_set_rd_strm, 2858 .show_rd_strm = 1, 2859 .set_wr_flow = ahd_linux_set_wr_flow, 2860 .show_wr_flow = 1, 2861 .set_rti = ahd_linux_set_rti, 2862 .show_rti = 1, 2863 .set_pcomp_en = ahd_linux_set_pcomp_en, 2864 .show_pcomp_en = 1, 2865 .set_hold_mcs = ahd_linux_set_hold_mcs, 2866 .show_hold_mcs = 1, 2867 .get_signalling = ahd_linux_get_signalling, 2868 }; 2869 2870 static int __init 2871 ahd_linux_init(void) 2872 { 2873 int error = 0; 2874 2875 /* 2876 * If we've been passed any parameters, process them now. 2877 */ 2878 if (aic79xx) 2879 aic79xx_setup(aic79xx); 2880 2881 ahd_linux_transport_template = 2882 spi_attach_transport(&ahd_linux_transport_functions); 2883 if (!ahd_linux_transport_template) 2884 return -ENODEV; 2885 2886 scsi_transport_reserve_device(ahd_linux_transport_template, 2887 sizeof(struct ahd_linux_device)); 2888 2889 error = ahd_linux_pci_init(); 2890 if (error) 2891 spi_release_transport(ahd_linux_transport_template); 2892 return error; 2893 } 2894 2895 static void __exit 2896 ahd_linux_exit(void) 2897 { 2898 ahd_linux_pci_exit(); 2899 spi_release_transport(ahd_linux_transport_template); 2900 } 2901 2902 module_init(ahd_linux_init); 2903 module_exit(ahd_linux_exit); 2904