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 if (bootverbose) 704 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 705 706 ahd_linux_device_queue_depth(sdev); 707 708 /* Initial Domain Validation */ 709 if (!spi_initial_dv(sdev->sdev_target)) 710 spi_dv_device(sdev); 711 712 return 0; 713 } 714 715 #if defined(__i386__) 716 /* 717 * Return the disk geometry for the given SCSI device. 718 */ 719 static int 720 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 721 sector_t capacity, int geom[]) 722 { 723 int heads; 724 int sectors; 725 int cylinders; 726 int extended; 727 struct ahd_softc *ahd; 728 729 ahd = *((struct ahd_softc **)sdev->host->hostdata); 730 731 if (scsi_partsize(bdev, capacity, geom)) 732 return 0; 733 734 heads = 64; 735 sectors = 32; 736 cylinders = aic_sector_div(capacity, heads, sectors); 737 738 if (aic79xx_extended != 0) 739 extended = 1; 740 else 741 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 742 if (extended && cylinders >= 1024) { 743 heads = 255; 744 sectors = 63; 745 cylinders = aic_sector_div(capacity, heads, sectors); 746 } 747 geom[0] = heads; 748 geom[1] = sectors; 749 geom[2] = cylinders; 750 return (0); 751 } 752 #endif 753 754 /* 755 * Abort the current SCSI command(s). 756 */ 757 static int 758 ahd_linux_abort(struct scsi_cmnd *cmd) 759 { 760 int error; 761 762 error = ahd_linux_queue_abort_cmd(cmd); 763 764 return error; 765 } 766 767 /* 768 * Attempt to send a target reset message to the device that timed out. 769 */ 770 static int 771 ahd_linux_dev_reset(struct scsi_cmnd *cmd) 772 { 773 struct ahd_softc *ahd; 774 struct ahd_linux_device *dev; 775 struct scb *reset_scb; 776 u_int cdb_byte; 777 int retval = SUCCESS; 778 struct ahd_initiator_tinfo *tinfo; 779 struct ahd_tmode_tstate *tstate; 780 unsigned long flags; 781 DECLARE_COMPLETION_ONSTACK(done); 782 783 reset_scb = NULL; 784 785 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 786 787 scmd_printk(KERN_INFO, cmd, 788 "Attempting to queue a TARGET RESET message:"); 789 790 printk("CDB:"); 791 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 792 printk(" 0x%x", cmd->cmnd[cdb_byte]); 793 printk("\n"); 794 795 /* 796 * Determine if we currently own this command. 797 */ 798 dev = scsi_transport_device_data(cmd->device); 799 800 if (dev == NULL) { 801 /* 802 * No target device for this command exists, 803 * so we must not still own the command. 804 */ 805 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 806 return SUCCESS; 807 } 808 809 /* 810 * Generate us a new SCB 811 */ 812 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); 813 if (!reset_scb) { 814 scmd_printk(KERN_INFO, cmd, "No SCB available\n"); 815 return FAILED; 816 } 817 818 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 819 cmd->device->id, &tstate); 820 reset_scb->io_ctx = cmd; 821 reset_scb->platform_data->dev = dev; 822 reset_scb->sg_count = 0; 823 ahd_set_residual(reset_scb, 0); 824 ahd_set_sense_residual(reset_scb, 0); 825 reset_scb->platform_data->xfer_len = 0; 826 reset_scb->hscb->control = 0; 827 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd); 828 reset_scb->hscb->lun = cmd->device->lun; 829 reset_scb->hscb->cdb_len = 0; 830 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; 831 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; 832 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 833 reset_scb->flags |= SCB_PACKETIZED; 834 } else { 835 reset_scb->hscb->control |= MK_MESSAGE; 836 } 837 dev->openings--; 838 dev->active++; 839 dev->commands_issued++; 840 841 ahd_lock(ahd, &flags); 842 843 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); 844 ahd_queue_scb(ahd, reset_scb); 845 846 ahd->platform_data->eh_done = &done; 847 ahd_unlock(ahd, &flags); 848 849 printk("%s: Device reset code sleeping\n", ahd_name(ahd)); 850 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 851 ahd_lock(ahd, &flags); 852 ahd->platform_data->eh_done = NULL; 853 ahd_unlock(ahd, &flags); 854 printk("%s: Device reset timer expired (active %d)\n", 855 ahd_name(ahd), dev->active); 856 retval = FAILED; 857 } 858 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); 859 860 return (retval); 861 } 862 863 /* 864 * Reset the SCSI bus. 865 */ 866 static int 867 ahd_linux_bus_reset(struct scsi_cmnd *cmd) 868 { 869 struct ahd_softc *ahd; 870 int found; 871 unsigned long flags; 872 873 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 874 #ifdef AHD_DEBUG 875 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 876 printk("%s: Bus reset called for cmd %p\n", 877 ahd_name(ahd), cmd); 878 #endif 879 ahd_lock(ahd, &flags); 880 881 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 882 /*initiate reset*/TRUE); 883 ahd_unlock(ahd, &flags); 884 885 if (bootverbose) 886 printk("%s: SCSI bus reset delivered. " 887 "%d SCBs aborted.\n", ahd_name(ahd), found); 888 889 return (SUCCESS); 890 } 891 892 struct scsi_host_template aic79xx_driver_template = { 893 .module = THIS_MODULE, 894 .name = "aic79xx", 895 .proc_name = "aic79xx", 896 .show_info = ahd_linux_show_info, 897 .write_info = ahd_proc_write_seeprom, 898 .info = ahd_linux_info, 899 .queuecommand = ahd_linux_queue, 900 .eh_abort_handler = ahd_linux_abort, 901 .eh_device_reset_handler = ahd_linux_dev_reset, 902 .eh_bus_reset_handler = ahd_linux_bus_reset, 903 #if defined(__i386__) 904 .bios_param = ahd_linux_biosparam, 905 #endif 906 .can_queue = AHD_MAX_QUEUE, 907 .this_id = -1, 908 .max_sectors = 8192, 909 .cmd_per_lun = 2, 910 .slave_alloc = ahd_linux_slave_alloc, 911 .slave_configure = ahd_linux_slave_configure, 912 .target_alloc = ahd_linux_target_alloc, 913 .target_destroy = ahd_linux_target_destroy, 914 }; 915 916 /******************************** Bus DMA *************************************/ 917 int 918 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 919 bus_size_t alignment, bus_size_t boundary, 920 dma_addr_t lowaddr, dma_addr_t highaddr, 921 bus_dma_filter_t *filter, void *filterarg, 922 bus_size_t maxsize, int nsegments, 923 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 924 { 925 bus_dma_tag_t dmat; 926 927 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 928 if (dmat == NULL) 929 return (ENOMEM); 930 931 /* 932 * Linux is very simplistic about DMA memory. For now don't 933 * maintain all specification information. Once Linux supplies 934 * better facilities for doing these operations, or the 935 * needs of this particular driver change, we might need to do 936 * more here. 937 */ 938 dmat->alignment = alignment; 939 dmat->boundary = boundary; 940 dmat->maxsize = maxsize; 941 *ret_tag = dmat; 942 return (0); 943 } 944 945 void 946 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 947 { 948 kfree(dmat); 949 } 950 951 int 952 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 953 int flags, bus_dmamap_t *mapp) 954 { 955 *vaddr = pci_alloc_consistent(ahd->dev_softc, 956 dmat->maxsize, mapp); 957 if (*vaddr == NULL) 958 return (ENOMEM); 959 return(0); 960 } 961 962 void 963 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 964 void* vaddr, bus_dmamap_t map) 965 { 966 pci_free_consistent(ahd->dev_softc, dmat->maxsize, 967 vaddr, map); 968 } 969 970 int 971 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 972 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 973 void *cb_arg, int flags) 974 { 975 /* 976 * Assume for now that this will only be used during 977 * initialization and not for per-transaction buffer mapping. 978 */ 979 bus_dma_segment_t stack_sg; 980 981 stack_sg.ds_addr = map; 982 stack_sg.ds_len = dmat->maxsize; 983 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 984 return (0); 985 } 986 987 void 988 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 989 { 990 } 991 992 int 993 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 994 { 995 /* Nothing to do */ 996 return (0); 997 } 998 999 /********************* Platform Dependent Functions ***************************/ 1000 static void 1001 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 1002 { 1003 1004 if ((instance >= 0) 1005 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { 1006 uint8_t *iocell_info; 1007 1008 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 1009 iocell_info[index] = value & 0xFFFF; 1010 if (bootverbose) 1011 printk("iocell[%d:%ld] = %d\n", instance, index, value); 1012 } 1013 } 1014 1015 static void 1016 ahd_linux_setup_tag_info_global(char *p) 1017 { 1018 int tags, i, j; 1019 1020 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 1021 printk("Setting Global Tags= %d\n", tags); 1022 1023 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { 1024 for (j = 0; j < AHD_NUM_TARGETS; j++) { 1025 aic79xx_tag_info[i].tag_commands[j] = tags; 1026 } 1027 } 1028 } 1029 1030 static void 1031 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 1032 { 1033 1034 if ((instance >= 0) && (targ >= 0) 1035 && (instance < ARRAY_SIZE(aic79xx_tag_info)) 1036 && (targ < AHD_NUM_TARGETS)) { 1037 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 1038 if (bootverbose) 1039 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 1040 } 1041 } 1042 1043 static char * 1044 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 1045 void (*callback)(u_long, int, int, int32_t), 1046 u_long callback_arg) 1047 { 1048 char *tok_end; 1049 char *tok_end2; 1050 int i; 1051 int instance; 1052 int targ; 1053 int done; 1054 char tok_list[] = {'.', ',', '{', '}', '\0'}; 1055 1056 /* All options use a ':' name/arg separator */ 1057 if (*opt_arg != ':') 1058 return (opt_arg); 1059 opt_arg++; 1060 instance = -1; 1061 targ = -1; 1062 done = FALSE; 1063 /* 1064 * Restore separator that may be in 1065 * the middle of our option argument. 1066 */ 1067 tok_end = strchr(opt_arg, '\0'); 1068 if (tok_end < end) 1069 *tok_end = ','; 1070 while (!done) { 1071 switch (*opt_arg) { 1072 case '{': 1073 if (instance == -1) { 1074 instance = 0; 1075 } else { 1076 if (depth > 1) { 1077 if (targ == -1) 1078 targ = 0; 1079 } else { 1080 printk("Malformed Option %s\n", 1081 opt_name); 1082 done = TRUE; 1083 } 1084 } 1085 opt_arg++; 1086 break; 1087 case '}': 1088 if (targ != -1) 1089 targ = -1; 1090 else if (instance != -1) 1091 instance = -1; 1092 opt_arg++; 1093 break; 1094 case ',': 1095 case '.': 1096 if (instance == -1) 1097 done = TRUE; 1098 else if (targ >= 0) 1099 targ++; 1100 else if (instance >= 0) 1101 instance++; 1102 opt_arg++; 1103 break; 1104 case '\0': 1105 done = TRUE; 1106 break; 1107 default: 1108 tok_end = end; 1109 for (i = 0; tok_list[i]; i++) { 1110 tok_end2 = strchr(opt_arg, tok_list[i]); 1111 if ((tok_end2) && (tok_end2 < tok_end)) 1112 tok_end = tok_end2; 1113 } 1114 callback(callback_arg, instance, targ, 1115 simple_strtol(opt_arg, NULL, 0)); 1116 opt_arg = tok_end; 1117 break; 1118 } 1119 } 1120 return (opt_arg); 1121 } 1122 1123 /* 1124 * Handle Linux boot parameters. This routine allows for assigning a value 1125 * to a parameter with a ':' between the parameter and the value. 1126 * ie. aic79xx=stpwlev:1,extended 1127 */ 1128 static int 1129 aic79xx_setup(char *s) 1130 { 1131 int i, n; 1132 char *p; 1133 char *end; 1134 1135 static const struct { 1136 const char *name; 1137 uint32_t *flag; 1138 } options[] = { 1139 { "extended", &aic79xx_extended }, 1140 { "no_reset", &aic79xx_no_reset }, 1141 { "verbose", &aic79xx_verbose }, 1142 { "allow_memio", &aic79xx_allow_memio}, 1143 #ifdef AHD_DEBUG 1144 { "debug", &ahd_debug }, 1145 #endif 1146 { "periodic_otag", &aic79xx_periodic_otag }, 1147 { "pci_parity", &aic79xx_pci_parity }, 1148 { "seltime", &aic79xx_seltime }, 1149 { "tag_info", NULL }, 1150 { "global_tag_depth", NULL}, 1151 { "slewrate", NULL }, 1152 { "precomp", NULL }, 1153 { "amplitude", NULL }, 1154 { "slowcrc", &aic79xx_slowcrc }, 1155 }; 1156 1157 end = strchr(s, '\0'); 1158 1159 /* 1160 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1161 * will never be 0 in this case. 1162 */ 1163 n = 0; 1164 1165 while ((p = strsep(&s, ",.")) != NULL) { 1166 if (*p == '\0') 1167 continue; 1168 for (i = 0; i < ARRAY_SIZE(options); i++) { 1169 1170 n = strlen(options[i].name); 1171 if (strncmp(options[i].name, p, n) == 0) 1172 break; 1173 } 1174 if (i == ARRAY_SIZE(options)) 1175 continue; 1176 1177 if (strncmp(p, "global_tag_depth", n) == 0) { 1178 ahd_linux_setup_tag_info_global(p + n); 1179 } else if (strncmp(p, "tag_info", n) == 0) { 1180 s = ahd_parse_brace_option("tag_info", p + n, end, 1181 2, ahd_linux_setup_tag_info, 0); 1182 } else if (strncmp(p, "slewrate", n) == 0) { 1183 s = ahd_parse_brace_option("slewrate", 1184 p + n, end, 1, ahd_linux_setup_iocell_info, 1185 AIC79XX_SLEWRATE_INDEX); 1186 } else if (strncmp(p, "precomp", n) == 0) { 1187 s = ahd_parse_brace_option("precomp", 1188 p + n, end, 1, ahd_linux_setup_iocell_info, 1189 AIC79XX_PRECOMP_INDEX); 1190 } else if (strncmp(p, "amplitude", n) == 0) { 1191 s = ahd_parse_brace_option("amplitude", 1192 p + n, end, 1, ahd_linux_setup_iocell_info, 1193 AIC79XX_AMPLITUDE_INDEX); 1194 } else if (p[n] == ':') { 1195 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1196 } else if (!strncmp(p, "verbose", n)) { 1197 *(options[i].flag) = 1; 1198 } else { 1199 *(options[i].flag) ^= 0xFFFFFFFF; 1200 } 1201 } 1202 return 1; 1203 } 1204 1205 __setup("aic79xx=", aic79xx_setup); 1206 1207 uint32_t aic79xx_verbose; 1208 1209 int 1210 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1211 { 1212 char buf[80]; 1213 struct Scsi_Host *host; 1214 char *new_name; 1215 u_long s; 1216 int retval; 1217 1218 template->name = ahd->description; 1219 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1220 if (host == NULL) 1221 return (ENOMEM); 1222 1223 *((struct ahd_softc **)host->hostdata) = ahd; 1224 ahd->platform_data->host = host; 1225 host->can_queue = AHD_MAX_QUEUE; 1226 host->cmd_per_lun = 2; 1227 host->sg_tablesize = AHD_NSEG; 1228 host->this_id = ahd->our_id; 1229 host->irq = ahd->platform_data->irq; 1230 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1231 host->max_lun = AHD_NUM_LUNS; 1232 host->max_channel = 0; 1233 host->sg_tablesize = AHD_NSEG; 1234 ahd_lock(ahd, &s); 1235 ahd_set_unit(ahd, ahd_linux_unit++); 1236 ahd_unlock(ahd, &s); 1237 sprintf(buf, "scsi%d", host->host_no); 1238 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1239 if (new_name != NULL) { 1240 strcpy(new_name, buf); 1241 ahd_set_name(ahd, new_name); 1242 } 1243 host->unique_id = ahd->unit; 1244 ahd_linux_initialize_scsi_bus(ahd); 1245 ahd_intr_enable(ahd, TRUE); 1246 1247 host->transportt = ahd_linux_transport_template; 1248 1249 retval = scsi_add_host(host, &ahd->dev_softc->dev); 1250 if (retval) { 1251 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); 1252 scsi_host_put(host); 1253 return retval; 1254 } 1255 1256 scsi_scan_host(host); 1257 return 0; 1258 } 1259 1260 /* 1261 * Place the SCSI bus into a known state by either resetting it, 1262 * or forcing transfer negotiations on the next command to any 1263 * target. 1264 */ 1265 static void 1266 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1267 { 1268 u_int target_id; 1269 u_int numtarg; 1270 unsigned long s; 1271 1272 target_id = 0; 1273 numtarg = 0; 1274 1275 if (aic79xx_no_reset != 0) 1276 ahd->flags &= ~AHD_RESET_BUS_A; 1277 1278 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1279 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1280 else 1281 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1282 1283 ahd_lock(ahd, &s); 1284 1285 /* 1286 * Force negotiation to async for all targets that 1287 * will not see an initial bus reset. 1288 */ 1289 for (; target_id < numtarg; target_id++) { 1290 struct ahd_devinfo devinfo; 1291 struct ahd_initiator_tinfo *tinfo; 1292 struct ahd_tmode_tstate *tstate; 1293 1294 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1295 target_id, &tstate); 1296 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1297 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1298 ahd_update_neg_request(ahd, &devinfo, tstate, 1299 tinfo, AHD_NEG_ALWAYS); 1300 } 1301 ahd_unlock(ahd, &s); 1302 /* Give the bus some time to recover */ 1303 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1304 ahd_freeze_simq(ahd); 1305 msleep(AIC79XX_RESET_DELAY); 1306 ahd_release_simq(ahd); 1307 } 1308 } 1309 1310 int 1311 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1312 { 1313 ahd->platform_data = 1314 kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC); 1315 if (ahd->platform_data == NULL) 1316 return (ENOMEM); 1317 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1318 ahd_lockinit(ahd); 1319 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1320 return (0); 1321 } 1322 1323 void 1324 ahd_platform_free(struct ahd_softc *ahd) 1325 { 1326 struct scsi_target *starget; 1327 int i; 1328 1329 if (ahd->platform_data != NULL) { 1330 /* destroy all of the device and target objects */ 1331 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1332 starget = ahd->platform_data->starget[i]; 1333 if (starget != NULL) { 1334 ahd->platform_data->starget[i] = NULL; 1335 } 1336 } 1337 1338 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1339 free_irq(ahd->platform_data->irq, ahd); 1340 if (ahd->tags[0] == BUS_SPACE_PIO 1341 && ahd->bshs[0].ioport != 0) 1342 release_region(ahd->bshs[0].ioport, 256); 1343 if (ahd->tags[1] == BUS_SPACE_PIO 1344 && ahd->bshs[1].ioport != 0) 1345 release_region(ahd->bshs[1].ioport, 256); 1346 if (ahd->tags[0] == BUS_SPACE_MEMIO 1347 && ahd->bshs[0].maddr != NULL) { 1348 iounmap(ahd->bshs[0].maddr); 1349 release_mem_region(ahd->platform_data->mem_busaddr, 1350 0x1000); 1351 } 1352 if (ahd->platform_data->host) 1353 scsi_host_put(ahd->platform_data->host); 1354 1355 kfree(ahd->platform_data); 1356 } 1357 } 1358 1359 void 1360 ahd_platform_init(struct ahd_softc *ahd) 1361 { 1362 /* 1363 * Lookup and commit any modified IO Cell options. 1364 */ 1365 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 1366 const struct ahd_linux_iocell_opts *iocell_opts; 1367 1368 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1369 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1370 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1371 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1372 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1373 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1374 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1375 } 1376 1377 } 1378 1379 void 1380 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1381 { 1382 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1383 SCB_GET_CHANNEL(ahd, scb), 1384 SCB_GET_LUN(scb), SCB_LIST_NULL, 1385 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1386 } 1387 1388 void 1389 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev, 1390 struct ahd_devinfo *devinfo, ahd_queue_alg alg) 1391 { 1392 struct ahd_linux_device *dev; 1393 int was_queuing; 1394 int now_queuing; 1395 1396 if (sdev == NULL) 1397 return; 1398 1399 dev = scsi_transport_device_data(sdev); 1400 1401 if (dev == NULL) 1402 return; 1403 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1404 switch (alg) { 1405 default: 1406 case AHD_QUEUE_NONE: 1407 now_queuing = 0; 1408 break; 1409 case AHD_QUEUE_BASIC: 1410 now_queuing = AHD_DEV_Q_BASIC; 1411 break; 1412 case AHD_QUEUE_TAGGED: 1413 now_queuing = AHD_DEV_Q_TAGGED; 1414 break; 1415 } 1416 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1417 && (was_queuing != now_queuing) 1418 && (dev->active != 0)) { 1419 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1420 dev->qfrozen++; 1421 } 1422 1423 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1424 if (now_queuing) { 1425 u_int usertags; 1426 1427 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1428 if (!was_queuing) { 1429 /* 1430 * Start out aggressively and allow our 1431 * dynamic queue depth algorithm to take 1432 * care of the rest. 1433 */ 1434 dev->maxtags = usertags; 1435 dev->openings = dev->maxtags - dev->active; 1436 } 1437 if (dev->maxtags == 0) { 1438 /* 1439 * Queueing is disabled by the user. 1440 */ 1441 dev->openings = 1; 1442 } else if (alg == AHD_QUEUE_TAGGED) { 1443 dev->flags |= AHD_DEV_Q_TAGGED; 1444 if (aic79xx_periodic_otag != 0) 1445 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1446 } else 1447 dev->flags |= AHD_DEV_Q_BASIC; 1448 } else { 1449 /* We can only have one opening. */ 1450 dev->maxtags = 0; 1451 dev->openings = 1 - dev->active; 1452 } 1453 1454 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1455 case AHD_DEV_Q_BASIC: 1456 case AHD_DEV_Q_TAGGED: 1457 scsi_change_queue_depth(sdev, 1458 dev->openings + dev->active); 1459 break; 1460 default: 1461 /* 1462 * We allow the OS to queue 2 untagged transactions to 1463 * us at any time even though we can only execute them 1464 * serially on the controller/device. This should 1465 * remove some latency. 1466 */ 1467 scsi_change_queue_depth(sdev, 1); 1468 break; 1469 } 1470 } 1471 1472 int 1473 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1474 int lun, u_int tag, role_t role, uint32_t status) 1475 { 1476 return 0; 1477 } 1478 1479 static u_int 1480 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1481 { 1482 static int warned_user; 1483 u_int tags; 1484 1485 tags = 0; 1486 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1487 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { 1488 1489 if (warned_user == 0) { 1490 printk(KERN_WARNING 1491 "aic79xx: WARNING: Insufficient tag_info instances\n" 1492 "aic79xx: for installed controllers. Using defaults\n" 1493 "aic79xx: Please update the aic79xx_tag_info array in\n" 1494 "aic79xx: the aic79xx_osm.c source file.\n"); 1495 warned_user++; 1496 } 1497 tags = AHD_MAX_QUEUE; 1498 } else { 1499 adapter_tag_info_t *tag_info; 1500 1501 tag_info = &aic79xx_tag_info[ahd->unit]; 1502 tags = tag_info->tag_commands[devinfo->target_offset]; 1503 if (tags > AHD_MAX_QUEUE) 1504 tags = AHD_MAX_QUEUE; 1505 } 1506 } 1507 return (tags); 1508 } 1509 1510 /* 1511 * Determines the queue depth for a given device. 1512 */ 1513 static void 1514 ahd_linux_device_queue_depth(struct scsi_device *sdev) 1515 { 1516 struct ahd_devinfo devinfo; 1517 u_int tags; 1518 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1519 1520 ahd_compile_devinfo(&devinfo, 1521 ahd->our_id, 1522 sdev->sdev_target->id, sdev->lun, 1523 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1524 ROLE_INITIATOR); 1525 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1526 if (tags != 0 && sdev->tagged_supported != 0) { 1527 1528 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); 1529 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1530 devinfo.lun, AC_TRANSFER_NEG); 1531 ahd_print_devinfo(ahd, &devinfo); 1532 printk("Tagged Queuing enabled. Depth %d\n", tags); 1533 } else { 1534 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); 1535 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1536 devinfo.lun, AC_TRANSFER_NEG); 1537 } 1538 } 1539 1540 static int 1541 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1542 struct scsi_cmnd *cmd) 1543 { 1544 struct scb *scb; 1545 struct hardware_scb *hscb; 1546 struct ahd_initiator_tinfo *tinfo; 1547 struct ahd_tmode_tstate *tstate; 1548 u_int col_idx; 1549 uint16_t mask; 1550 unsigned long flags; 1551 int nseg; 1552 1553 nseg = scsi_dma_map(cmd); 1554 if (nseg < 0) 1555 return SCSI_MLQUEUE_HOST_BUSY; 1556 1557 ahd_lock(ahd, &flags); 1558 1559 /* 1560 * Get an scb to use. 1561 */ 1562 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1563 cmd->device->id, &tstate); 1564 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1565 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1566 col_idx = AHD_NEVER_COL_IDX; 1567 } else { 1568 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1569 cmd->device->lun); 1570 } 1571 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1572 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1573 ahd_unlock(ahd, &flags); 1574 scsi_dma_unmap(cmd); 1575 return SCSI_MLQUEUE_HOST_BUSY; 1576 } 1577 1578 scb->io_ctx = cmd; 1579 scb->platform_data->dev = dev; 1580 hscb = scb->hscb; 1581 cmd->host_scribble = (char *)scb; 1582 1583 /* 1584 * Fill out basics of the HSCB. 1585 */ 1586 hscb->control = 0; 1587 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1588 hscb->lun = cmd->device->lun; 1589 scb->hscb->task_management = 0; 1590 mask = SCB_GET_TARGET_MASK(ahd, scb); 1591 1592 if ((ahd->user_discenable & mask) != 0) 1593 hscb->control |= DISCENB; 1594 1595 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1596 scb->flags |= SCB_PACKETIZED; 1597 1598 if ((tstate->auto_negotiate & mask) != 0) { 1599 scb->flags |= SCB_AUTO_NEGOTIATE; 1600 scb->hscb->control |= MK_MESSAGE; 1601 } 1602 1603 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1604 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1605 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1606 hscb->control |= MSG_ORDERED_TASK; 1607 dev->commands_since_idle_or_otag = 0; 1608 } else { 1609 hscb->control |= MSG_SIMPLE_TASK; 1610 } 1611 } 1612 1613 hscb->cdb_len = cmd->cmd_len; 1614 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1615 1616 scb->platform_data->xfer_len = 0; 1617 ahd_set_residual(scb, 0); 1618 ahd_set_sense_residual(scb, 0); 1619 scb->sg_count = 0; 1620 1621 if (nseg > 0) { 1622 void *sg = scb->sg_list; 1623 struct scatterlist *cur_seg; 1624 int i; 1625 1626 scb->platform_data->xfer_len = 0; 1627 1628 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1629 dma_addr_t addr; 1630 bus_size_t len; 1631 1632 addr = sg_dma_address(cur_seg); 1633 len = sg_dma_len(cur_seg); 1634 scb->platform_data->xfer_len += len; 1635 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1636 i == (nseg - 1)); 1637 } 1638 } 1639 1640 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1641 dev->openings--; 1642 dev->active++; 1643 dev->commands_issued++; 1644 1645 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1646 dev->commands_since_idle_or_otag++; 1647 scb->flags |= SCB_ACTIVE; 1648 ahd_queue_scb(ahd, scb); 1649 1650 ahd_unlock(ahd, &flags); 1651 1652 return 0; 1653 } 1654 1655 /* 1656 * SCSI controller interrupt handler. 1657 */ 1658 irqreturn_t 1659 ahd_linux_isr(int irq, void *dev_id) 1660 { 1661 struct ahd_softc *ahd; 1662 u_long flags; 1663 int ours; 1664 1665 ahd = (struct ahd_softc *) dev_id; 1666 ahd_lock(ahd, &flags); 1667 ours = ahd_intr(ahd); 1668 ahd_unlock(ahd, &flags); 1669 return IRQ_RETVAL(ours); 1670 } 1671 1672 void 1673 ahd_send_async(struct ahd_softc *ahd, char channel, 1674 u_int target, u_int lun, ac_code code) 1675 { 1676 switch (code) { 1677 case AC_TRANSFER_NEG: 1678 { 1679 struct scsi_target *starget; 1680 struct ahd_initiator_tinfo *tinfo; 1681 struct ahd_tmode_tstate *tstate; 1682 unsigned int target_ppr_options; 1683 1684 BUG_ON(target == CAM_TARGET_WILDCARD); 1685 1686 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1687 target, &tstate); 1688 1689 /* 1690 * Don't bother reporting results while 1691 * negotiations are still pending. 1692 */ 1693 if (tinfo->curr.period != tinfo->goal.period 1694 || tinfo->curr.width != tinfo->goal.width 1695 || tinfo->curr.offset != tinfo->goal.offset 1696 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1697 if (bootverbose == 0) 1698 break; 1699 1700 /* 1701 * Don't bother reporting results that 1702 * are identical to those last reported. 1703 */ 1704 starget = ahd->platform_data->starget[target]; 1705 if (starget == NULL) 1706 break; 1707 1708 target_ppr_options = 1709 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1710 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1711 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1712 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1713 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1714 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1715 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1716 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1717 1718 if (tinfo->curr.period == spi_period(starget) 1719 && tinfo->curr.width == spi_width(starget) 1720 && tinfo->curr.offset == spi_offset(starget) 1721 && tinfo->curr.ppr_options == target_ppr_options) 1722 if (bootverbose == 0) 1723 break; 1724 1725 spi_period(starget) = tinfo->curr.period; 1726 spi_width(starget) = tinfo->curr.width; 1727 spi_offset(starget) = tinfo->curr.offset; 1728 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1729 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1730 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1731 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1732 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1733 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1734 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1735 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1736 spi_display_xfer_agreement(starget); 1737 break; 1738 } 1739 case AC_SENT_BDR: 1740 { 1741 WARN_ON(lun != CAM_LUN_WILDCARD); 1742 scsi_report_device_reset(ahd->platform_data->host, 1743 channel - 'A', target); 1744 break; 1745 } 1746 case AC_BUS_RESET: 1747 if (ahd->platform_data->host != NULL) { 1748 scsi_report_bus_reset(ahd->platform_data->host, 1749 channel - 'A'); 1750 } 1751 break; 1752 default: 1753 panic("ahd_send_async: Unexpected async event"); 1754 } 1755 } 1756 1757 /* 1758 * Calls the higher level scsi done function and frees the scb. 1759 */ 1760 void 1761 ahd_done(struct ahd_softc *ahd, struct scb *scb) 1762 { 1763 struct scsi_cmnd *cmd; 1764 struct ahd_linux_device *dev; 1765 1766 if ((scb->flags & SCB_ACTIVE) == 0) { 1767 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1768 ahd_dump_card_state(ahd); 1769 panic("Stopping for safety"); 1770 } 1771 LIST_REMOVE(scb, pending_links); 1772 cmd = scb->io_ctx; 1773 dev = scb->platform_data->dev; 1774 dev->active--; 1775 dev->openings++; 1776 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1777 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1778 dev->qfrozen--; 1779 } 1780 ahd_linux_unmap_scb(ahd, scb); 1781 1782 /* 1783 * Guard against stale sense data. 1784 * The Linux mid-layer assumes that sense 1785 * was retrieved anytime the first byte of 1786 * the sense buffer looks "sane". 1787 */ 1788 cmd->sense_buffer[0] = 0; 1789 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1790 #ifdef AHD_REPORT_UNDERFLOWS 1791 uint32_t amount_xferred; 1792 1793 amount_xferred = 1794 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1795 #endif 1796 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1797 #ifdef AHD_DEBUG 1798 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1799 ahd_print_path(ahd, scb); 1800 printk("Set CAM_UNCOR_PARITY\n"); 1801 } 1802 #endif 1803 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1804 #ifdef AHD_REPORT_UNDERFLOWS 1805 /* 1806 * This code is disabled by default as some 1807 * clients of the SCSI system do not properly 1808 * initialize the underflow parameter. This 1809 * results in spurious termination of commands 1810 * that complete as expected (e.g. underflow is 1811 * allowed as command can return variable amounts 1812 * of data. 1813 */ 1814 } else if (amount_xferred < scb->io_ctx->underflow) { 1815 u_int i; 1816 1817 ahd_print_path(ahd, scb); 1818 printk("CDB:"); 1819 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1820 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1821 printk("\n"); 1822 ahd_print_path(ahd, scb); 1823 printk("Saw underflow (%ld of %ld bytes). " 1824 "Treated as error\n", 1825 ahd_get_residual(scb), 1826 ahd_get_transfer_length(scb)); 1827 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1828 #endif 1829 } else { 1830 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1831 } 1832 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1833 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1834 } 1835 1836 if (dev->openings == 1 1837 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1838 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1839 dev->tag_success_count++; 1840 /* 1841 * Some devices deal with temporary internal resource 1842 * shortages by returning queue full. When the queue 1843 * full occurrs, we throttle back. Slowly try to get 1844 * back to our previous queue depth. 1845 */ 1846 if ((dev->openings + dev->active) < dev->maxtags 1847 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1848 dev->tag_success_count = 0; 1849 dev->openings++; 1850 } 1851 1852 if (dev->active == 0) 1853 dev->commands_since_idle_or_otag = 0; 1854 1855 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1856 printk("Recovery SCB completes\n"); 1857 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1858 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1859 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1860 1861 if (ahd->platform_data->eh_done) 1862 complete(ahd->platform_data->eh_done); 1863 } 1864 1865 ahd_free_scb(ahd, scb); 1866 ahd_linux_queue_cmd_complete(ahd, cmd); 1867 } 1868 1869 static void 1870 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1871 struct scsi_device *sdev, struct scb *scb) 1872 { 1873 struct ahd_devinfo devinfo; 1874 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1875 1876 ahd_compile_devinfo(&devinfo, 1877 ahd->our_id, 1878 sdev->sdev_target->id, sdev->lun, 1879 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1880 ROLE_INITIATOR); 1881 1882 /* 1883 * We don't currently trust the mid-layer to 1884 * properly deal with queue full or busy. So, 1885 * when one occurs, we tell the mid-layer to 1886 * unconditionally requeue the command to us 1887 * so that we can retry it ourselves. We also 1888 * implement our own throttling mechanism so 1889 * we don't clobber the device with too many 1890 * commands. 1891 */ 1892 switch (ahd_get_scsi_status(scb)) { 1893 default: 1894 break; 1895 case SCSI_STATUS_CHECK_COND: 1896 case SCSI_STATUS_CMD_TERMINATED: 1897 { 1898 struct scsi_cmnd *cmd; 1899 1900 /* 1901 * Copy sense information to the OS's cmd 1902 * structure if it is available. 1903 */ 1904 cmd = scb->io_ctx; 1905 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1906 struct scsi_status_iu_header *siu; 1907 u_int sense_size; 1908 u_int sense_offset; 1909 1910 if (scb->flags & SCB_SENSE) { 1911 sense_size = min(sizeof(struct scsi_sense_data) 1912 - ahd_get_sense_residual(scb), 1913 (u_long)SCSI_SENSE_BUFFERSIZE); 1914 sense_offset = 0; 1915 } else { 1916 /* 1917 * Copy only the sense data into the provided 1918 * buffer. 1919 */ 1920 siu = (struct scsi_status_iu_header *) 1921 scb->sense_data; 1922 sense_size = min_t(size_t, 1923 scsi_4btoul(siu->sense_length), 1924 SCSI_SENSE_BUFFERSIZE); 1925 sense_offset = SIU_SENSE_OFFSET(siu); 1926 } 1927 1928 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1929 memcpy(cmd->sense_buffer, 1930 ahd_get_sense_buf(ahd, scb) 1931 + sense_offset, sense_size); 1932 cmd->result |= (DRIVER_SENSE << 24); 1933 1934 #ifdef AHD_DEBUG 1935 if (ahd_debug & AHD_SHOW_SENSE) { 1936 int i; 1937 1938 printk("Copied %d bytes of sense data at %d:", 1939 sense_size, sense_offset); 1940 for (i = 0; i < sense_size; i++) { 1941 if ((i & 0xF) == 0) 1942 printk("\n"); 1943 printk("0x%x ", cmd->sense_buffer[i]); 1944 } 1945 printk("\n"); 1946 } 1947 #endif 1948 } 1949 break; 1950 } 1951 case SCSI_STATUS_QUEUE_FULL: 1952 /* 1953 * By the time the core driver has returned this 1954 * command, all other commands that were queued 1955 * to us but not the device have been returned. 1956 * This ensures that dev->active is equal to 1957 * the number of commands actually queued to 1958 * the device. 1959 */ 1960 dev->tag_success_count = 0; 1961 if (dev->active != 0) { 1962 /* 1963 * Drop our opening count to the number 1964 * of commands currently outstanding. 1965 */ 1966 dev->openings = 0; 1967 #ifdef AHD_DEBUG 1968 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1969 ahd_print_path(ahd, scb); 1970 printk("Dropping tag count to %d\n", 1971 dev->active); 1972 } 1973 #endif 1974 if (dev->active == dev->tags_on_last_queuefull) { 1975 1976 dev->last_queuefull_same_count++; 1977 /* 1978 * If we repeatedly see a queue full 1979 * at the same queue depth, this 1980 * device has a fixed number of tag 1981 * slots. Lock in this tag depth 1982 * so we stop seeing queue fulls from 1983 * this device. 1984 */ 1985 if (dev->last_queuefull_same_count 1986 == AHD_LOCK_TAGS_COUNT) { 1987 dev->maxtags = dev->active; 1988 ahd_print_path(ahd, scb); 1989 printk("Locking max tag count at %d\n", 1990 dev->active); 1991 } 1992 } else { 1993 dev->tags_on_last_queuefull = dev->active; 1994 dev->last_queuefull_same_count = 0; 1995 } 1996 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 1997 ahd_set_scsi_status(scb, SCSI_STATUS_OK); 1998 ahd_platform_set_tags(ahd, sdev, &devinfo, 1999 (dev->flags & AHD_DEV_Q_BASIC) 2000 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2001 break; 2002 } 2003 /* 2004 * Drop down to a single opening, and treat this 2005 * as if the target returned BUSY SCSI status. 2006 */ 2007 dev->openings = 1; 2008 ahd_platform_set_tags(ahd, sdev, &devinfo, 2009 (dev->flags & AHD_DEV_Q_BASIC) 2010 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2011 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); 2012 } 2013 } 2014 2015 static void 2016 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 2017 { 2018 int status; 2019 int new_status = DID_OK; 2020 int do_fallback = 0; 2021 int scsi_status; 2022 2023 /* 2024 * Map CAM error codes into Linux Error codes. We 2025 * avoid the conversion so that the DV code has the 2026 * full error information available when making 2027 * state change decisions. 2028 */ 2029 2030 status = ahd_cmd_get_transaction_status(cmd); 2031 switch (status) { 2032 case CAM_REQ_INPROG: 2033 case CAM_REQ_CMP: 2034 new_status = DID_OK; 2035 break; 2036 case CAM_AUTOSENSE_FAIL: 2037 new_status = DID_ERROR; 2038 fallthrough; 2039 case CAM_SCSI_STATUS_ERROR: 2040 scsi_status = ahd_cmd_get_scsi_status(cmd); 2041 2042 switch(scsi_status) { 2043 case SCSI_STATUS_CMD_TERMINATED: 2044 case SCSI_STATUS_CHECK_COND: 2045 if ((cmd->result >> 24) != DRIVER_SENSE) { 2046 do_fallback = 1; 2047 } else { 2048 struct scsi_sense_data *sense; 2049 2050 sense = (struct scsi_sense_data *) 2051 cmd->sense_buffer; 2052 if (sense->extra_len >= 5 && 2053 (sense->add_sense_code == 0x47 2054 || sense->add_sense_code == 0x48)) 2055 do_fallback = 1; 2056 } 2057 break; 2058 default: 2059 break; 2060 } 2061 break; 2062 case CAM_REQ_ABORTED: 2063 new_status = DID_ABORT; 2064 break; 2065 case CAM_BUSY: 2066 new_status = DID_BUS_BUSY; 2067 break; 2068 case CAM_REQ_INVALID: 2069 case CAM_PATH_INVALID: 2070 new_status = DID_BAD_TARGET; 2071 break; 2072 case CAM_SEL_TIMEOUT: 2073 new_status = DID_NO_CONNECT; 2074 break; 2075 case CAM_SCSI_BUS_RESET: 2076 case CAM_BDR_SENT: 2077 new_status = DID_RESET; 2078 break; 2079 case CAM_UNCOR_PARITY: 2080 new_status = DID_PARITY; 2081 do_fallback = 1; 2082 break; 2083 case CAM_CMD_TIMEOUT: 2084 new_status = DID_TIME_OUT; 2085 do_fallback = 1; 2086 break; 2087 case CAM_REQ_CMP_ERR: 2088 case CAM_UNEXP_BUSFREE: 2089 case CAM_DATA_RUN_ERR: 2090 new_status = DID_ERROR; 2091 do_fallback = 1; 2092 break; 2093 case CAM_UA_ABORT: 2094 case CAM_NO_HBA: 2095 case CAM_SEQUENCE_FAIL: 2096 case CAM_CCB_LEN_ERR: 2097 case CAM_PROVIDE_FAIL: 2098 case CAM_REQ_TERMIO: 2099 case CAM_UNREC_HBA_ERROR: 2100 case CAM_REQ_TOO_BIG: 2101 new_status = DID_ERROR; 2102 break; 2103 case CAM_REQUEUE_REQ: 2104 new_status = DID_REQUEUE; 2105 break; 2106 default: 2107 /* We should never get here */ 2108 new_status = DID_ERROR; 2109 break; 2110 } 2111 2112 if (do_fallback) { 2113 printk("%s: device overrun (status %x) on %d:%d:%d\n", 2114 ahd_name(ahd), status, cmd->device->channel, 2115 cmd->device->id, (u8)cmd->device->lun); 2116 } 2117 2118 ahd_cmd_set_transaction_status(cmd, new_status); 2119 2120 cmd->scsi_done(cmd); 2121 } 2122 2123 static void 2124 ahd_freeze_simq(struct ahd_softc *ahd) 2125 { 2126 scsi_block_requests(ahd->platform_data->host); 2127 } 2128 2129 static void 2130 ahd_release_simq(struct ahd_softc *ahd) 2131 { 2132 scsi_unblock_requests(ahd->platform_data->host); 2133 } 2134 2135 static int 2136 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2137 { 2138 struct ahd_softc *ahd; 2139 struct ahd_linux_device *dev; 2140 struct scb *pending_scb; 2141 u_int saved_scbptr; 2142 u_int active_scbptr; 2143 u_int last_phase; 2144 u_int saved_scsiid; 2145 u_int cdb_byte; 2146 int retval = SUCCESS; 2147 int was_paused; 2148 int paused; 2149 int wait; 2150 int disconnected; 2151 ahd_mode_state saved_modes; 2152 unsigned long flags; 2153 2154 pending_scb = NULL; 2155 paused = FALSE; 2156 wait = FALSE; 2157 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2158 2159 scmd_printk(KERN_INFO, cmd, 2160 "Attempting to queue an ABORT message:"); 2161 2162 printk("CDB:"); 2163 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2164 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2165 printk("\n"); 2166 2167 ahd_lock(ahd, &flags); 2168 2169 /* 2170 * First determine if we currently own this command. 2171 * Start by searching the device queue. If not found 2172 * there, check the pending_scb list. If not found 2173 * at all, and the system wanted us to just abort the 2174 * command, return success. 2175 */ 2176 dev = scsi_transport_device_data(cmd->device); 2177 2178 if (dev == NULL) { 2179 /* 2180 * No target device for this command exists, 2181 * so we must not still own the command. 2182 */ 2183 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2184 goto done; 2185 } 2186 2187 /* 2188 * See if we can find a matching cmd in the pending list. 2189 */ 2190 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2191 if (pending_scb->io_ctx == cmd) 2192 break; 2193 } 2194 2195 if (pending_scb == NULL) { 2196 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2197 goto done; 2198 } 2199 2200 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2201 /* 2202 * We can't queue two recovery actions using the same SCB 2203 */ 2204 retval = FAILED; 2205 goto done; 2206 } 2207 2208 /* 2209 * Ensure that the card doesn't do anything 2210 * behind our back. Also make sure that we 2211 * didn't "just" miss an interrupt that would 2212 * affect this cmd. 2213 */ 2214 was_paused = ahd_is_paused(ahd); 2215 ahd_pause_and_flushwork(ahd); 2216 paused = TRUE; 2217 2218 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2219 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2220 goto done; 2221 } 2222 2223 printk("%s: At time of recovery, card was %spaused\n", 2224 ahd_name(ahd), was_paused ? "" : "not "); 2225 ahd_dump_card_state(ahd); 2226 2227 disconnected = TRUE; 2228 if (ahd_search_qinfifo(ahd, cmd->device->id, 2229 cmd->device->channel + 'A', 2230 cmd->device->lun, 2231 pending_scb->hscb->tag, 2232 ROLE_INITIATOR, CAM_REQ_ABORTED, 2233 SEARCH_COMPLETE) > 0) { 2234 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2235 ahd_name(ahd), cmd->device->channel, 2236 cmd->device->id, (u8)cmd->device->lun); 2237 goto done; 2238 } 2239 2240 saved_modes = ahd_save_modes(ahd); 2241 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2242 last_phase = ahd_inb(ahd, LASTPHASE); 2243 saved_scbptr = ahd_get_scbptr(ahd); 2244 active_scbptr = saved_scbptr; 2245 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2246 struct scb *bus_scb; 2247 2248 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2249 if (bus_scb == pending_scb) 2250 disconnected = FALSE; 2251 } 2252 2253 /* 2254 * At this point, pending_scb is the scb associated with the 2255 * passed in command. That command is currently active on the 2256 * bus or is in the disconnected state. 2257 */ 2258 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); 2259 if (last_phase != P_BUSFREE 2260 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2261 2262 /* 2263 * We're active on the bus, so assert ATN 2264 * and hope that the target responds. 2265 */ 2266 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2267 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2268 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2269 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2270 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2271 wait = TRUE; 2272 } else if (disconnected) { 2273 2274 /* 2275 * Actually re-queue this SCB in an attempt 2276 * to select the device before it reconnects. 2277 */ 2278 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2279 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2280 pending_scb->hscb->cdb_len = 0; 2281 pending_scb->hscb->task_attribute = 0; 2282 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2283 2284 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2285 /* 2286 * Mark the SCB has having an outstanding 2287 * task management function. Should the command 2288 * complete normally before the task management 2289 * function can be sent, the host will be notified 2290 * to abort our requeued SCB. 2291 */ 2292 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2293 pending_scb->hscb->task_management); 2294 } else { 2295 /* 2296 * If non-packetized, set the MK_MESSAGE control 2297 * bit indicating that we desire to send a message. 2298 * We also set the disconnected flag since there is 2299 * no guarantee that our SCB control byte matches 2300 * the version on the card. We don't want the 2301 * sequencer to abort the command thinking an 2302 * unsolicited reselection occurred. 2303 */ 2304 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2305 2306 /* 2307 * The sequencer will never re-reference the 2308 * in-core SCB. To make sure we are notified 2309 * during reselection, set the MK_MESSAGE flag in 2310 * the card's copy of the SCB. 2311 */ 2312 ahd_outb(ahd, SCB_CONTROL, 2313 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2314 } 2315 2316 /* 2317 * Clear out any entries in the QINFIFO first 2318 * so we are the next SCB for this target 2319 * to run. 2320 */ 2321 ahd_search_qinfifo(ahd, cmd->device->id, 2322 cmd->device->channel + 'A', cmd->device->lun, 2323 SCB_LIST_NULL, ROLE_INITIATOR, 2324 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2325 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2326 ahd_set_scbptr(ahd, saved_scbptr); 2327 ahd_print_path(ahd, pending_scb); 2328 printk("Device is disconnected, re-queuing SCB\n"); 2329 wait = TRUE; 2330 } else { 2331 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2332 retval = FAILED; 2333 } 2334 2335 2336 ahd_restore_modes(ahd, saved_modes); 2337 done: 2338 if (paused) 2339 ahd_unpause(ahd); 2340 if (wait) { 2341 DECLARE_COMPLETION_ONSTACK(done); 2342 2343 ahd->platform_data->eh_done = &done; 2344 ahd_unlock(ahd, &flags); 2345 2346 printk("%s: Recovery code sleeping\n", ahd_name(ahd)); 2347 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2348 ahd_lock(ahd, &flags); 2349 ahd->platform_data->eh_done = NULL; 2350 ahd_unlock(ahd, &flags); 2351 printk("%s: Timer Expired (active %d)\n", 2352 ahd_name(ahd), dev->active); 2353 retval = FAILED; 2354 } 2355 printk("Recovery code awake\n"); 2356 } else 2357 ahd_unlock(ahd, &flags); 2358 2359 if (retval != SUCCESS) 2360 printk("%s: Command abort returning 0x%x\n", 2361 ahd_name(ahd), retval); 2362 2363 return retval; 2364 } 2365 2366 static void ahd_linux_set_width(struct scsi_target *starget, int width) 2367 { 2368 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2369 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2370 struct ahd_devinfo devinfo; 2371 unsigned long flags; 2372 2373 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2374 starget->channel + 'A', ROLE_INITIATOR); 2375 ahd_lock(ahd, &flags); 2376 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2377 ahd_unlock(ahd, &flags); 2378 } 2379 2380 static void ahd_linux_set_period(struct scsi_target *starget, int period) 2381 { 2382 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2383 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2384 struct ahd_tmode_tstate *tstate; 2385 struct ahd_initiator_tinfo *tinfo 2386 = ahd_fetch_transinfo(ahd, 2387 starget->channel + 'A', 2388 shost->this_id, starget->id, &tstate); 2389 struct ahd_devinfo devinfo; 2390 unsigned int ppr_options = tinfo->goal.ppr_options; 2391 unsigned int dt; 2392 unsigned long flags; 2393 unsigned long offset = tinfo->goal.offset; 2394 2395 #ifdef AHD_DEBUG 2396 if ((ahd_debug & AHD_SHOW_DV) != 0) 2397 printk("%s: set period to %d\n", ahd_name(ahd), period); 2398 #endif 2399 if (offset == 0) 2400 offset = MAX_OFFSET; 2401 2402 if (period < 8) 2403 period = 8; 2404 if (period < 10) { 2405 if (spi_max_width(starget)) { 2406 ppr_options |= MSG_EXT_PPR_DT_REQ; 2407 if (period == 8) 2408 ppr_options |= MSG_EXT_PPR_IU_REQ; 2409 } else 2410 period = 10; 2411 } 2412 2413 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2414 2415 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2416 starget->channel + 'A', ROLE_INITIATOR); 2417 2418 /* all PPR requests apart from QAS require wide transfers */ 2419 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2420 if (spi_width(starget) == 0) 2421 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2422 } 2423 2424 ahd_find_syncrate(ahd, &period, &ppr_options, 2425 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2426 2427 ahd_lock(ahd, &flags); 2428 ahd_set_syncrate(ahd, &devinfo, period, offset, 2429 ppr_options, AHD_TRANS_GOAL, FALSE); 2430 ahd_unlock(ahd, &flags); 2431 } 2432 2433 static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2434 { 2435 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2436 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2437 struct ahd_tmode_tstate *tstate; 2438 struct ahd_initiator_tinfo *tinfo 2439 = ahd_fetch_transinfo(ahd, 2440 starget->channel + 'A', 2441 shost->this_id, starget->id, &tstate); 2442 struct ahd_devinfo devinfo; 2443 unsigned int ppr_options = 0; 2444 unsigned int period = 0; 2445 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2446 unsigned long flags; 2447 2448 #ifdef AHD_DEBUG 2449 if ((ahd_debug & AHD_SHOW_DV) != 0) 2450 printk("%s: set offset to %d\n", ahd_name(ahd), offset); 2451 #endif 2452 2453 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2454 starget->channel + 'A', ROLE_INITIATOR); 2455 if (offset != 0) { 2456 period = tinfo->goal.period; 2457 ppr_options = tinfo->goal.ppr_options; 2458 ahd_find_syncrate(ahd, &period, &ppr_options, 2459 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2460 } 2461 2462 ahd_lock(ahd, &flags); 2463 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2464 AHD_TRANS_GOAL, FALSE); 2465 ahd_unlock(ahd, &flags); 2466 } 2467 2468 static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2469 { 2470 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2471 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2472 struct ahd_tmode_tstate *tstate; 2473 struct ahd_initiator_tinfo *tinfo 2474 = ahd_fetch_transinfo(ahd, 2475 starget->channel + 'A', 2476 shost->this_id, starget->id, &tstate); 2477 struct ahd_devinfo devinfo; 2478 unsigned int ppr_options = tinfo->goal.ppr_options 2479 & ~MSG_EXT_PPR_DT_REQ; 2480 unsigned int period = tinfo->goal.period; 2481 unsigned int width = tinfo->goal.width; 2482 unsigned long flags; 2483 2484 #ifdef AHD_DEBUG 2485 if ((ahd_debug & AHD_SHOW_DV) != 0) 2486 printk("%s: %s DT\n", ahd_name(ahd), 2487 dt ? "enabling" : "disabling"); 2488 #endif 2489 if (dt && spi_max_width(starget)) { 2490 ppr_options |= MSG_EXT_PPR_DT_REQ; 2491 if (!width) 2492 ahd_linux_set_width(starget, 1); 2493 } else { 2494 if (period <= 9) 2495 period = 10; /* If resetting DT, period must be >= 25ns */ 2496 /* IU is invalid without DT set */ 2497 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2498 } 2499 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2500 starget->channel + 'A', ROLE_INITIATOR); 2501 ahd_find_syncrate(ahd, &period, &ppr_options, 2502 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2503 2504 ahd_lock(ahd, &flags); 2505 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2506 ppr_options, AHD_TRANS_GOAL, FALSE); 2507 ahd_unlock(ahd, &flags); 2508 } 2509 2510 static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2511 { 2512 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2513 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2514 struct ahd_tmode_tstate *tstate; 2515 struct ahd_initiator_tinfo *tinfo 2516 = ahd_fetch_transinfo(ahd, 2517 starget->channel + 'A', 2518 shost->this_id, starget->id, &tstate); 2519 struct ahd_devinfo devinfo; 2520 unsigned int ppr_options = tinfo->goal.ppr_options 2521 & ~MSG_EXT_PPR_QAS_REQ; 2522 unsigned int period = tinfo->goal.period; 2523 unsigned int dt; 2524 unsigned long flags; 2525 2526 #ifdef AHD_DEBUG 2527 if ((ahd_debug & AHD_SHOW_DV) != 0) 2528 printk("%s: %s QAS\n", ahd_name(ahd), 2529 qas ? "enabling" : "disabling"); 2530 #endif 2531 2532 if (qas) { 2533 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2534 } 2535 2536 dt = ppr_options & MSG_EXT_PPR_DT_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_iu(struct scsi_target *starget, int iu) 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_IU_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 IU\n", ahd_name(ahd), 2568 iu ? "enabling" : "disabling"); 2569 #endif 2570 2571 if (iu && spi_max_width(starget)) { 2572 ppr_options |= MSG_EXT_PPR_IU_REQ; 2573 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2574 } 2575 2576 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2577 2578 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2579 starget->channel + 'A', ROLE_INITIATOR); 2580 ahd_find_syncrate(ahd, &period, &ppr_options, 2581 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2582 2583 ahd_lock(ahd, &flags); 2584 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2585 ppr_options, AHD_TRANS_GOAL, FALSE); 2586 ahd_unlock(ahd, &flags); 2587 } 2588 2589 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2590 { 2591 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2592 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2593 struct ahd_tmode_tstate *tstate; 2594 struct ahd_initiator_tinfo *tinfo 2595 = ahd_fetch_transinfo(ahd, 2596 starget->channel + 'A', 2597 shost->this_id, starget->id, &tstate); 2598 struct ahd_devinfo devinfo; 2599 unsigned int ppr_options = tinfo->goal.ppr_options 2600 & ~MSG_EXT_PPR_RD_STRM; 2601 unsigned int period = tinfo->goal.period; 2602 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2603 unsigned long flags; 2604 2605 #ifdef AHD_DEBUG 2606 if ((ahd_debug & AHD_SHOW_DV) != 0) 2607 printk("%s: %s Read Streaming\n", ahd_name(ahd), 2608 rdstrm ? "enabling" : "disabling"); 2609 #endif 2610 2611 if (rdstrm && spi_max_width(starget)) 2612 ppr_options |= MSG_EXT_PPR_RD_STRM; 2613 2614 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2615 starget->channel + 'A', ROLE_INITIATOR); 2616 ahd_find_syncrate(ahd, &period, &ppr_options, 2617 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2618 2619 ahd_lock(ahd, &flags); 2620 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2621 ppr_options, AHD_TRANS_GOAL, FALSE); 2622 ahd_unlock(ahd, &flags); 2623 } 2624 2625 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2626 { 2627 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2628 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2629 struct ahd_tmode_tstate *tstate; 2630 struct ahd_initiator_tinfo *tinfo 2631 = ahd_fetch_transinfo(ahd, 2632 starget->channel + 'A', 2633 shost->this_id, starget->id, &tstate); 2634 struct ahd_devinfo devinfo; 2635 unsigned int ppr_options = tinfo->goal.ppr_options 2636 & ~MSG_EXT_PPR_WR_FLOW; 2637 unsigned int period = tinfo->goal.period; 2638 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2639 unsigned long flags; 2640 2641 #ifdef AHD_DEBUG 2642 if ((ahd_debug & AHD_SHOW_DV) != 0) 2643 printk("%s: %s Write Flow Control\n", ahd_name(ahd), 2644 wrflow ? "enabling" : "disabling"); 2645 #endif 2646 2647 if (wrflow && spi_max_width(starget)) 2648 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2649 2650 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2651 starget->channel + 'A', ROLE_INITIATOR); 2652 ahd_find_syncrate(ahd, &period, &ppr_options, 2653 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2654 2655 ahd_lock(ahd, &flags); 2656 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2657 ppr_options, AHD_TRANS_GOAL, FALSE); 2658 ahd_unlock(ahd, &flags); 2659 } 2660 2661 static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2662 { 2663 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2664 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2665 struct ahd_tmode_tstate *tstate; 2666 struct ahd_initiator_tinfo *tinfo 2667 = ahd_fetch_transinfo(ahd, 2668 starget->channel + 'A', 2669 shost->this_id, starget->id, &tstate); 2670 struct ahd_devinfo devinfo; 2671 unsigned int ppr_options = tinfo->goal.ppr_options 2672 & ~MSG_EXT_PPR_RTI; 2673 unsigned int period = tinfo->goal.period; 2674 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2675 unsigned long flags; 2676 2677 if ((ahd->features & AHD_RTI) == 0) { 2678 #ifdef AHD_DEBUG 2679 if ((ahd_debug & AHD_SHOW_DV) != 0) 2680 printk("%s: RTI not available\n", ahd_name(ahd)); 2681 #endif 2682 return; 2683 } 2684 2685 #ifdef AHD_DEBUG 2686 if ((ahd_debug & AHD_SHOW_DV) != 0) 2687 printk("%s: %s RTI\n", ahd_name(ahd), 2688 rti ? "enabling" : "disabling"); 2689 #endif 2690 2691 if (rti && spi_max_width(starget)) 2692 ppr_options |= MSG_EXT_PPR_RTI; 2693 2694 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2695 starget->channel + 'A', ROLE_INITIATOR); 2696 ahd_find_syncrate(ahd, &period, &ppr_options, 2697 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2698 2699 ahd_lock(ahd, &flags); 2700 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2701 ppr_options, AHD_TRANS_GOAL, FALSE); 2702 ahd_unlock(ahd, &flags); 2703 } 2704 2705 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2706 { 2707 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2708 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2709 struct ahd_tmode_tstate *tstate; 2710 struct ahd_initiator_tinfo *tinfo 2711 = ahd_fetch_transinfo(ahd, 2712 starget->channel + 'A', 2713 shost->this_id, starget->id, &tstate); 2714 struct ahd_devinfo devinfo; 2715 unsigned int ppr_options = tinfo->goal.ppr_options 2716 & ~MSG_EXT_PPR_PCOMP_EN; 2717 unsigned int period = tinfo->goal.period; 2718 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2719 unsigned long flags; 2720 2721 #ifdef AHD_DEBUG 2722 if ((ahd_debug & AHD_SHOW_DV) != 0) 2723 printk("%s: %s Precompensation\n", ahd_name(ahd), 2724 pcomp ? "Enable" : "Disable"); 2725 #endif 2726 2727 if (pcomp && spi_max_width(starget)) { 2728 uint8_t precomp; 2729 2730 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 2731 const struct ahd_linux_iocell_opts *iocell_opts; 2732 2733 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2734 precomp = iocell_opts->precomp; 2735 } else { 2736 precomp = AIC79XX_DEFAULT_PRECOMP; 2737 } 2738 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2739 AHD_SET_PRECOMP(ahd, precomp); 2740 } else { 2741 AHD_SET_PRECOMP(ahd, 0); 2742 } 2743 2744 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2745 starget->channel + 'A', ROLE_INITIATOR); 2746 ahd_find_syncrate(ahd, &period, &ppr_options, 2747 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2748 2749 ahd_lock(ahd, &flags); 2750 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2751 ppr_options, AHD_TRANS_GOAL, FALSE); 2752 ahd_unlock(ahd, &flags); 2753 } 2754 2755 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2756 { 2757 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2758 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2759 struct ahd_tmode_tstate *tstate; 2760 struct ahd_initiator_tinfo *tinfo 2761 = ahd_fetch_transinfo(ahd, 2762 starget->channel + 'A', 2763 shost->this_id, starget->id, &tstate); 2764 struct ahd_devinfo devinfo; 2765 unsigned int ppr_options = tinfo->goal.ppr_options 2766 & ~MSG_EXT_PPR_HOLD_MCS; 2767 unsigned int period = tinfo->goal.period; 2768 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2769 unsigned long flags; 2770 2771 if (hold && spi_max_width(starget)) 2772 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2773 2774 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2775 starget->channel + 'A', ROLE_INITIATOR); 2776 ahd_find_syncrate(ahd, &period, &ppr_options, 2777 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2778 2779 ahd_lock(ahd, &flags); 2780 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2781 ppr_options, AHD_TRANS_GOAL, FALSE); 2782 ahd_unlock(ahd, &flags); 2783 } 2784 2785 static void ahd_linux_get_signalling(struct Scsi_Host *shost) 2786 { 2787 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; 2788 unsigned long flags; 2789 u8 mode; 2790 2791 ahd_lock(ahd, &flags); 2792 ahd_pause(ahd); 2793 mode = ahd_inb(ahd, SBLKCTL); 2794 ahd_unpause(ahd); 2795 ahd_unlock(ahd, &flags); 2796 2797 if (mode & ENAB40) 2798 spi_signalling(shost) = SPI_SIGNAL_LVD; 2799 else if (mode & ENAB20) 2800 spi_signalling(shost) = SPI_SIGNAL_SE; 2801 else 2802 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2803 } 2804 2805 static struct spi_function_template ahd_linux_transport_functions = { 2806 .set_offset = ahd_linux_set_offset, 2807 .show_offset = 1, 2808 .set_period = ahd_linux_set_period, 2809 .show_period = 1, 2810 .set_width = ahd_linux_set_width, 2811 .show_width = 1, 2812 .set_dt = ahd_linux_set_dt, 2813 .show_dt = 1, 2814 .set_iu = ahd_linux_set_iu, 2815 .show_iu = 1, 2816 .set_qas = ahd_linux_set_qas, 2817 .show_qas = 1, 2818 .set_rd_strm = ahd_linux_set_rd_strm, 2819 .show_rd_strm = 1, 2820 .set_wr_flow = ahd_linux_set_wr_flow, 2821 .show_wr_flow = 1, 2822 .set_rti = ahd_linux_set_rti, 2823 .show_rti = 1, 2824 .set_pcomp_en = ahd_linux_set_pcomp_en, 2825 .show_pcomp_en = 1, 2826 .set_hold_mcs = ahd_linux_set_hold_mcs, 2827 .show_hold_mcs = 1, 2828 .get_signalling = ahd_linux_get_signalling, 2829 }; 2830 2831 static int __init 2832 ahd_linux_init(void) 2833 { 2834 int error = 0; 2835 2836 /* 2837 * If we've been passed any parameters, process them now. 2838 */ 2839 if (aic79xx) 2840 aic79xx_setup(aic79xx); 2841 2842 ahd_linux_transport_template = 2843 spi_attach_transport(&ahd_linux_transport_functions); 2844 if (!ahd_linux_transport_template) 2845 return -ENODEV; 2846 2847 scsi_transport_reserve_device(ahd_linux_transport_template, 2848 sizeof(struct ahd_linux_device)); 2849 2850 error = ahd_linux_pci_init(); 2851 if (error) 2852 spi_release_transport(ahd_linux_transport_template); 2853 return error; 2854 } 2855 2856 static void __exit 2857 ahd_linux_exit(void) 2858 { 2859 ahd_linux_pci_exit(); 2860 spi_release_transport(ahd_linux_transport_template); 2861 } 2862 2863 module_init(ahd_linux_init); 2864 module_exit(ahd_linux_exit); 2865