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 57 /* 58 * Bucket size for counting good commands in between bad ones. 59 */ 60 #define AHD_LINUX_ERR_THRESH 1000 61 62 /* 63 * Set this to the delay in seconds after SCSI bus reset. 64 * Note, we honor this only for the initial bus reset. 65 * The scsi error recovery code performs its own bus settle 66 * delay handling for error recovery actions. 67 */ 68 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS 69 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS 70 #else 71 #define AIC79XX_RESET_DELAY 5000 72 #endif 73 74 /* 75 * To change the default number of tagged transactions allowed per-device, 76 * add a line to the lilo.conf file like: 77 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 78 * which will result in the first four devices on the first two 79 * controllers being set to a tagged queue depth of 32. 80 * 81 * The tag_commands is an array of 16 to allow for wide and twin adapters. 82 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 83 * for channel 1. 84 */ 85 typedef struct { 86 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */ 87 } adapter_tag_info_t; 88 89 /* 90 * Modify this as you see fit for your system. 91 * 92 * 0 tagged queuing disabled 93 * 1 <= n <= 253 n == max tags ever dispatched. 94 * 95 * The driver will throttle the number of commands dispatched to a 96 * device if it returns queue full. For devices with a fixed maximum 97 * queue depth, the driver will eventually determine this depth and 98 * lock it in (a console message is printed to indicate that a lock 99 * has occurred). On some devices, queue full is returned for a temporary 100 * resource shortage. These devices will return queue full at varying 101 * depths. The driver will throttle back when the queue fulls occur and 102 * attempt to slowly increase the depth over time as the device recovers 103 * from the resource shortage. 104 * 105 * In this example, the first line will disable tagged queueing for all 106 * the devices on the first probed aic79xx adapter. 107 * 108 * The second line enables tagged queueing with 4 commands/LUN for IDs 109 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 110 * driver to attempt to use up to 64 tags for ID 1. 111 * 112 * The third line is the same as the first line. 113 * 114 * The fourth line disables tagged queueing for devices 0 and 3. It 115 * enables tagged queueing for the other IDs, with 16 commands/LUN 116 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 117 * IDs 2, 5-7, and 9-15. 118 */ 119 120 /* 121 * NOTE: The below structure is for reference only, the actual structure 122 * to modify in order to change things is just below this comment block. 123 adapter_tag_info_t aic79xx_tag_info[] = 124 { 125 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 126 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 127 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 128 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 129 }; 130 */ 131 132 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE 133 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE 134 #else 135 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE 136 #endif 137 138 #define AIC79XX_CONFIGED_TAG_COMMANDS { \ 139 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 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 } 148 149 /* 150 * By default, use the number of commands specified by 151 * the users kernel configuration. 152 */ 153 static adapter_tag_info_t aic79xx_tag_info[] = 154 { 155 {AIC79XX_CONFIGED_TAG_COMMANDS}, 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 }; 172 173 /* 174 * The I/O cell on the chip is very configurable in respect to its analog 175 * characteristics. Set the defaults here; they can be overriden with 176 * the proper insmod parameters. 177 */ 178 struct ahd_linux_iocell_opts 179 { 180 uint8_t precomp; 181 uint8_t slewrate; 182 uint8_t amplitude; 183 }; 184 #define AIC79XX_DEFAULT_PRECOMP 0xFF 185 #define AIC79XX_DEFAULT_SLEWRATE 0xFF 186 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF 187 #define AIC79XX_DEFAULT_IOOPTS \ 188 { \ 189 AIC79XX_DEFAULT_PRECOMP, \ 190 AIC79XX_DEFAULT_SLEWRATE, \ 191 AIC79XX_DEFAULT_AMPLITUDE \ 192 } 193 #define AIC79XX_PRECOMP_INDEX 0 194 #define AIC79XX_SLEWRATE_INDEX 1 195 #define AIC79XX_AMPLITUDE_INDEX 2 196 static const struct ahd_linux_iocell_opts aic79xx_iocell_info[] = 197 { 198 AIC79XX_DEFAULT_IOOPTS, 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 }; 215 216 /* 217 * There should be a specific return value for this in scsi.h, but 218 * it seems that most drivers ignore it. 219 */ 220 #define DID_UNDERFLOW DID_ERROR 221 222 void 223 ahd_print_path(struct ahd_softc *ahd, struct scb *scb) 224 { 225 printk("(scsi%d:%c:%d:%d): ", 226 ahd->platform_data->host->host_no, 227 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X', 228 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1, 229 scb != NULL ? SCB_GET_LUN(scb) : -1); 230 } 231 232 /* 233 * XXX - these options apply unilaterally to _all_ adapters 234 * cards in the system. This should be fixed. Exceptions to this 235 * rule are noted in the comments. 236 */ 237 238 /* 239 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 240 * has no effect on any later resets that might occur due to things like 241 * SCSI bus timeouts. 242 */ 243 static uint32_t aic79xx_no_reset; 244 245 /* 246 * Should we force EXTENDED translation on a controller. 247 * 0 == Use whatever is in the SEEPROM or default to off 248 * 1 == Use whatever is in the SEEPROM or default to on 249 */ 250 static uint32_t aic79xx_extended; 251 252 /* 253 * PCI bus parity checking of the Adaptec controllers. This is somewhat 254 * dubious at best. To my knowledge, this option has never actually 255 * solved a PCI parity problem, but on certain machines with broken PCI 256 * chipset configurations, it can generate tons of false error messages. 257 * It's included in the driver for completeness. 258 * 0 = Shut off PCI parity check 259 * non-0 = Enable PCI parity check 260 * 261 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this 262 * variable to -1 you would actually want to simply pass the variable 263 * name without a number. That will invert the 0 which will result in 264 * -1. 265 */ 266 static uint32_t aic79xx_pci_parity = ~0; 267 268 /* 269 * There are lots of broken chipsets in the world. Some of them will 270 * violate the PCI spec when we issue byte sized memory writes to our 271 * controller. I/O mapped register access, if allowed by the given 272 * platform, will work in almost all cases. 273 */ 274 uint32_t aic79xx_allow_memio = ~0; 275 276 /* 277 * So that we can set how long each device is given as a selection timeout. 278 * The table of values goes like this: 279 * 0 - 256ms 280 * 1 - 128ms 281 * 2 - 64ms 282 * 3 - 32ms 283 * We default to 256ms because some older devices need a longer time 284 * to respond to initial selection. 285 */ 286 static uint32_t aic79xx_seltime; 287 288 /* 289 * Certain devices do not perform any aging on commands. Should the 290 * device be saturated by commands in one portion of the disk, it is 291 * possible for transactions on far away sectors to never be serviced. 292 * To handle these devices, we can periodically send an ordered tag to 293 * force all outstanding transactions to be serviced prior to a new 294 * transaction. 295 */ 296 static uint32_t aic79xx_periodic_otag; 297 298 /* Some storage boxes are using an LSI chip which has a bug making it 299 * impossible to use aic79xx Rev B chip in 320 speeds. The following 300 * storage boxes have been reported to be buggy: 301 * EonStor 3U 16-Bay: U16U-G3A3 302 * EonStor 2U 12-Bay: U12U-G3A3 303 * SentinelRAID: 2500F R5 / R6 304 * SentinelRAID: 2500F R1 305 * SentinelRAID: 2500F/1500F 306 * SentinelRAID: 150F 307 * 308 * To get around this LSI bug, you can set your board to 160 mode 309 * or you can enable the SLOWCRC bit. 310 */ 311 uint32_t aic79xx_slowcrc; 312 313 /* 314 * Module information and settable options. 315 */ 316 static char *aic79xx = NULL; 317 318 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); 319 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver"); 320 MODULE_LICENSE("Dual BSD/GPL"); 321 MODULE_VERSION(AIC79XX_DRIVER_VERSION); 322 module_param(aic79xx, charp, 0444); 323 MODULE_PARM_DESC(aic79xx, 324 "period-delimited options string:\n" 325 " verbose Enable verbose/diagnostic logging\n" 326 " allow_memio Allow device registers to be memory mapped\n" 327 " debug Bitmask of debug values to enable\n" 328 " no_reset Suppress initial bus resets\n" 329 " extended Enable extended geometry on all controllers\n" 330 " periodic_otag Send an ordered tagged transaction\n" 331 " periodically to prevent tag starvation.\n" 332 " This may be required by some older disk\n" 333 " or drives/RAID arrays.\n" 334 " tag_info:<tag_str> Set per-target tag depth\n" 335 " global_tag_depth:<int> Global tag depth for all targets on all buses\n" 336 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" 337 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n" 338 " amplitude:<int> Set the signal amplitude (0-7).\n" 339 " seltime:<int> Selection Timeout:\n" 340 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 341 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n" 342 "\n" 343 " Sample /etc/modprobe.conf line:\n" 344 " Enable verbose logging\n" 345 " Set tag depth on Controller 2/Target 2 to 10 tags\n" 346 " Shorten the selection timeout to 128ms\n" 347 "\n" 348 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" 349 ); 350 351 static void ahd_linux_handle_scsi_status(struct ahd_softc *, 352 struct scsi_device *, 353 struct scb *); 354 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, 355 struct scsi_cmnd *cmd); 356 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd); 357 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); 358 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, 359 struct ahd_devinfo *devinfo); 360 static void ahd_linux_device_queue_depth(struct scsi_device *); 361 static int ahd_linux_run_command(struct ahd_softc*, 362 struct ahd_linux_device *, 363 struct scsi_cmnd *); 364 static void ahd_linux_setup_tag_info_global(char *p); 365 static int aic79xx_setup(char *c); 366 static void ahd_freeze_simq(struct ahd_softc *ahd); 367 static void ahd_release_simq(struct ahd_softc *ahd); 368 369 static int ahd_linux_unit; 370 371 372 /************************** OS Utility Wrappers *******************************/ 373 void ahd_delay(long); 374 void 375 ahd_delay(long usec) 376 { 377 /* 378 * udelay on Linux can have problems for 379 * multi-millisecond waits. Wait at most 380 * 1024us per call. 381 */ 382 while (usec > 0) { 383 udelay(usec % 1024); 384 usec -= 1024; 385 } 386 } 387 388 389 /***************************** Low Level I/O **********************************/ 390 uint8_t ahd_inb(struct ahd_softc * ahd, long port); 391 void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val); 392 void ahd_outw_atomic(struct ahd_softc * ahd, 393 long port, uint16_t val); 394 void ahd_outsb(struct ahd_softc * ahd, long port, 395 uint8_t *, int count); 396 void ahd_insb(struct ahd_softc * ahd, long port, 397 uint8_t *, int count); 398 399 uint8_t 400 ahd_inb(struct ahd_softc * ahd, long port) 401 { 402 uint8_t x; 403 404 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 405 x = readb(ahd->bshs[0].maddr + port); 406 } else { 407 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); 408 } 409 mb(); 410 return (x); 411 } 412 413 #if 0 /* unused */ 414 static uint16_t 415 ahd_inw_atomic(struct ahd_softc * ahd, long port) 416 { 417 uint8_t x; 418 419 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 420 x = readw(ahd->bshs[0].maddr + port); 421 } else { 422 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); 423 } 424 mb(); 425 return (x); 426 } 427 #endif 428 429 void 430 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val) 431 { 432 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 433 writeb(val, ahd->bshs[0].maddr + port); 434 } else { 435 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); 436 } 437 mb(); 438 } 439 440 void 441 ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val) 442 { 443 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 444 writew(val, ahd->bshs[0].maddr + port); 445 } else { 446 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); 447 } 448 mb(); 449 } 450 451 void 452 ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count) 453 { 454 int i; 455 456 /* 457 * There is probably a more efficient way to do this on Linux 458 * but we don't use this for anything speed critical and this 459 * should work. 460 */ 461 for (i = 0; i < count; i++) 462 ahd_outb(ahd, port, *array++); 463 } 464 465 void 466 ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count) 467 { 468 int i; 469 470 /* 471 * There is probably a more efficient way to do this on Linux 472 * but we don't use this for anything speed critical and this 473 * should work. 474 */ 475 for (i = 0; i < count; i++) 476 *array++ = ahd_inb(ahd, port); 477 } 478 479 /******************************* PCI Routines *********************************/ 480 uint32_t 481 ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width) 482 { 483 switch (width) { 484 case 1: 485 { 486 uint8_t retval; 487 488 pci_read_config_byte(pci, reg, &retval); 489 return (retval); 490 } 491 case 2: 492 { 493 uint16_t retval; 494 pci_read_config_word(pci, reg, &retval); 495 return (retval); 496 } 497 case 4: 498 { 499 uint32_t retval; 500 pci_read_config_dword(pci, reg, &retval); 501 return (retval); 502 } 503 default: 504 panic("ahd_pci_read_config: Read size too big"); 505 /* NOTREACHED */ 506 return (0); 507 } 508 } 509 510 void 511 ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width) 512 { 513 switch (width) { 514 case 1: 515 pci_write_config_byte(pci, reg, value); 516 break; 517 case 2: 518 pci_write_config_word(pci, reg, value); 519 break; 520 case 4: 521 pci_write_config_dword(pci, reg, value); 522 break; 523 default: 524 panic("ahd_pci_write_config: Write size too big"); 525 /* NOTREACHED */ 526 } 527 } 528 529 /****************************** Inlines ***************************************/ 530 static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); 531 532 static void 533 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) 534 { 535 struct scsi_cmnd *cmd; 536 537 cmd = scb->io_ctx; 538 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); 539 scsi_dma_unmap(cmd); 540 } 541 542 /******************************** Macros **************************************/ 543 #define BUILD_SCSIID(ahd, cmd) \ 544 (((scmd_id(cmd) << TID_SHIFT) & TID) | (ahd)->our_id) 545 546 /* 547 * Return a string describing the driver. 548 */ 549 static const char * 550 ahd_linux_info(struct Scsi_Host *host) 551 { 552 static char buffer[512]; 553 char ahd_info[256]; 554 char *bp; 555 struct ahd_softc *ahd; 556 557 bp = &buffer[0]; 558 ahd = *(struct ahd_softc **)host->hostdata; 559 memset(bp, 0, sizeof(buffer)); 560 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n" 561 " <"); 562 strcat(bp, ahd->description); 563 strcat(bp, ">\n" 564 " "); 565 ahd_controller_info(ahd, ahd_info); 566 strcat(bp, ahd_info); 567 568 return (bp); 569 } 570 571 /* 572 * Queue an SCB to the controller. 573 */ 574 static int 575 ahd_linux_queue(struct scsi_cmnd * cmd, void (*scsi_done) (struct scsi_cmnd *)) 576 { 577 struct ahd_softc *ahd; 578 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device); 579 int rtn = SCSI_MLQUEUE_HOST_BUSY; 580 581 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 582 583 cmd->scsi_done = scsi_done; 584 cmd->result = CAM_REQ_INPROG << 16; 585 rtn = ahd_linux_run_command(ahd, dev, cmd); 586 587 return rtn; 588 } 589 590 static struct scsi_target ** 591 ahd_linux_target_in_softc(struct scsi_target *starget) 592 { 593 struct ahd_softc *ahd = 594 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 595 unsigned int target_offset; 596 597 target_offset = starget->id; 598 if (starget->channel != 0) 599 target_offset += 8; 600 601 return &ahd->platform_data->starget[target_offset]; 602 } 603 604 static int 605 ahd_linux_target_alloc(struct scsi_target *starget) 606 { 607 struct ahd_softc *ahd = 608 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 609 struct seeprom_config *sc = ahd->seep_config; 610 unsigned long flags; 611 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 612 struct ahd_devinfo devinfo; 613 struct ahd_initiator_tinfo *tinfo; 614 struct ahd_tmode_tstate *tstate; 615 char channel = starget->channel + 'A'; 616 617 ahd_lock(ahd, &flags); 618 619 BUG_ON(*ahd_targp != NULL); 620 621 *ahd_targp = starget; 622 623 if (sc) { 624 int flags = sc->device_flags[starget->id]; 625 626 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 627 starget->id, &tstate); 628 629 if ((flags & CFPACKETIZED) == 0) { 630 /* don't negotiate packetized (IU) transfers */ 631 spi_max_iu(starget) = 0; 632 } else { 633 if ((ahd->features & AHD_RTI) == 0) 634 spi_rti(starget) = 0; 635 } 636 637 if ((flags & CFQAS) == 0) 638 spi_max_qas(starget) = 0; 639 640 /* Transinfo values have been set to BIOS settings */ 641 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 642 spi_min_period(starget) = tinfo->user.period; 643 spi_max_offset(starget) = tinfo->user.offset; 644 } 645 646 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 647 starget->id, &tstate); 648 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id, 649 CAM_LUN_WILDCARD, channel, 650 ROLE_INITIATOR); 651 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, 652 AHD_TRANS_GOAL, /*paused*/FALSE); 653 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 654 AHD_TRANS_GOAL, /*paused*/FALSE); 655 ahd_unlock(ahd, &flags); 656 657 return 0; 658 } 659 660 static void 661 ahd_linux_target_destroy(struct scsi_target *starget) 662 { 663 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 664 665 *ahd_targp = NULL; 666 } 667 668 static int 669 ahd_linux_slave_alloc(struct scsi_device *sdev) 670 { 671 struct ahd_softc *ahd = 672 *((struct ahd_softc **)sdev->host->hostdata); 673 struct ahd_linux_device *dev; 674 675 if (bootverbose) 676 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id); 677 678 dev = scsi_transport_device_data(sdev); 679 memset(dev, 0, sizeof(*dev)); 680 681 /* 682 * We start out life using untagged 683 * transactions of which we allow one. 684 */ 685 dev->openings = 1; 686 687 /* 688 * Set maxtags to 0. This will be changed if we 689 * later determine that we are dealing with 690 * a tagged queuing capable device. 691 */ 692 dev->maxtags = 0; 693 694 return (0); 695 } 696 697 static int 698 ahd_linux_slave_configure(struct scsi_device *sdev) 699 { 700 struct ahd_softc *ahd; 701 702 ahd = *((struct ahd_softc **)sdev->host->hostdata); 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 uint8_t *bh; 724 int heads; 725 int sectors; 726 int cylinders; 727 int ret; 728 int extended; 729 struct ahd_softc *ahd; 730 731 ahd = *((struct ahd_softc **)sdev->host->hostdata); 732 733 bh = scsi_bios_ptable(bdev); 734 if (bh) { 735 ret = scsi_partsize(bh, capacity, 736 &geom[2], &geom[0], &geom[1]); 737 kfree(bh); 738 if (ret != -1) 739 return (ret); 740 } 741 heads = 64; 742 sectors = 32; 743 cylinders = aic_sector_div(capacity, heads, sectors); 744 745 if (aic79xx_extended != 0) 746 extended = 1; 747 else 748 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 749 if (extended && cylinders >= 1024) { 750 heads = 255; 751 sectors = 63; 752 cylinders = aic_sector_div(capacity, heads, sectors); 753 } 754 geom[0] = heads; 755 geom[1] = sectors; 756 geom[2] = cylinders; 757 return (0); 758 } 759 #endif 760 761 /* 762 * Abort the current SCSI command(s). 763 */ 764 static int 765 ahd_linux_abort(struct scsi_cmnd *cmd) 766 { 767 int error; 768 769 error = ahd_linux_queue_abort_cmd(cmd); 770 771 return error; 772 } 773 774 /* 775 * Attempt to send a target reset message to the device that timed out. 776 */ 777 static int 778 ahd_linux_dev_reset(struct scsi_cmnd *cmd) 779 { 780 struct ahd_softc *ahd; 781 struct ahd_linux_device *dev; 782 struct scb *reset_scb; 783 u_int cdb_byte; 784 int retval = SUCCESS; 785 int paused; 786 int wait; 787 struct ahd_initiator_tinfo *tinfo; 788 struct ahd_tmode_tstate *tstate; 789 unsigned long flags; 790 DECLARE_COMPLETION_ONSTACK(done); 791 792 reset_scb = NULL; 793 paused = FALSE; 794 wait = FALSE; 795 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 796 797 scmd_printk(KERN_INFO, cmd, 798 "Attempting to queue a TARGET RESET message:"); 799 800 printf("CDB:"); 801 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 802 printf(" 0x%x", cmd->cmnd[cdb_byte]); 803 printf("\n"); 804 805 /* 806 * Determine if we currently own this command. 807 */ 808 dev = scsi_transport_device_data(cmd->device); 809 810 if (dev == NULL) { 811 /* 812 * No target device for this command exists, 813 * so we must not still own the command. 814 */ 815 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 816 return SUCCESS; 817 } 818 819 /* 820 * Generate us a new SCB 821 */ 822 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); 823 if (!reset_scb) { 824 scmd_printk(KERN_INFO, cmd, "No SCB available\n"); 825 return FAILED; 826 } 827 828 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 829 cmd->device->id, &tstate); 830 reset_scb->io_ctx = cmd; 831 reset_scb->platform_data->dev = dev; 832 reset_scb->sg_count = 0; 833 ahd_set_residual(reset_scb, 0); 834 ahd_set_sense_residual(reset_scb, 0); 835 reset_scb->platform_data->xfer_len = 0; 836 reset_scb->hscb->control = 0; 837 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd); 838 reset_scb->hscb->lun = cmd->device->lun; 839 reset_scb->hscb->cdb_len = 0; 840 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; 841 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; 842 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 843 reset_scb->flags |= SCB_PACKETIZED; 844 } else { 845 reset_scb->hscb->control |= MK_MESSAGE; 846 } 847 dev->openings--; 848 dev->active++; 849 dev->commands_issued++; 850 851 ahd_lock(ahd, &flags); 852 853 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); 854 ahd_queue_scb(ahd, reset_scb); 855 856 ahd->platform_data->eh_done = &done; 857 ahd_unlock(ahd, &flags); 858 859 printf("%s: Device reset code sleeping\n", ahd_name(ahd)); 860 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 861 ahd_lock(ahd, &flags); 862 ahd->platform_data->eh_done = NULL; 863 ahd_unlock(ahd, &flags); 864 printf("%s: Device reset timer expired (active %d)\n", 865 ahd_name(ahd), dev->active); 866 retval = FAILED; 867 } 868 printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); 869 870 return (retval); 871 } 872 873 /* 874 * Reset the SCSI bus. 875 */ 876 static int 877 ahd_linux_bus_reset(struct scsi_cmnd *cmd) 878 { 879 struct ahd_softc *ahd; 880 int found; 881 unsigned long flags; 882 883 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 884 #ifdef AHD_DEBUG 885 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 886 printf("%s: Bus reset called for cmd %p\n", 887 ahd_name(ahd), cmd); 888 #endif 889 ahd_lock(ahd, &flags); 890 891 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 892 /*initiate reset*/TRUE); 893 ahd_unlock(ahd, &flags); 894 895 if (bootverbose) 896 printf("%s: SCSI bus reset delivered. " 897 "%d SCBs aborted.\n", ahd_name(ahd), found); 898 899 return (SUCCESS); 900 } 901 902 struct scsi_host_template aic79xx_driver_template = { 903 .module = THIS_MODULE, 904 .name = "aic79xx", 905 .proc_name = "aic79xx", 906 .proc_info = ahd_linux_proc_info, 907 .info = ahd_linux_info, 908 .queuecommand = ahd_linux_queue, 909 .eh_abort_handler = ahd_linux_abort, 910 .eh_device_reset_handler = ahd_linux_dev_reset, 911 .eh_bus_reset_handler = ahd_linux_bus_reset, 912 #if defined(__i386__) 913 .bios_param = ahd_linux_biosparam, 914 #endif 915 .can_queue = AHD_MAX_QUEUE, 916 .this_id = -1, 917 .max_sectors = 8192, 918 .cmd_per_lun = 2, 919 .use_clustering = ENABLE_CLUSTERING, 920 .slave_alloc = ahd_linux_slave_alloc, 921 .slave_configure = ahd_linux_slave_configure, 922 .target_alloc = ahd_linux_target_alloc, 923 .target_destroy = ahd_linux_target_destroy, 924 }; 925 926 /******************************** Bus DMA *************************************/ 927 int 928 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 929 bus_size_t alignment, bus_size_t boundary, 930 dma_addr_t lowaddr, dma_addr_t highaddr, 931 bus_dma_filter_t *filter, void *filterarg, 932 bus_size_t maxsize, int nsegments, 933 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 934 { 935 bus_dma_tag_t dmat; 936 937 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); 938 if (dmat == NULL) 939 return (ENOMEM); 940 941 /* 942 * Linux is very simplistic about DMA memory. For now don't 943 * maintain all specification information. Once Linux supplies 944 * better facilities for doing these operations, or the 945 * needs of this particular driver change, we might need to do 946 * more here. 947 */ 948 dmat->alignment = alignment; 949 dmat->boundary = boundary; 950 dmat->maxsize = maxsize; 951 *ret_tag = dmat; 952 return (0); 953 } 954 955 void 956 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 957 { 958 free(dmat, M_DEVBUF); 959 } 960 961 int 962 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 963 int flags, bus_dmamap_t *mapp) 964 { 965 *vaddr = pci_alloc_consistent(ahd->dev_softc, 966 dmat->maxsize, mapp); 967 if (*vaddr == NULL) 968 return (ENOMEM); 969 return(0); 970 } 971 972 void 973 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 974 void* vaddr, bus_dmamap_t map) 975 { 976 pci_free_consistent(ahd->dev_softc, dmat->maxsize, 977 vaddr, map); 978 } 979 980 int 981 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 982 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 983 void *cb_arg, int flags) 984 { 985 /* 986 * Assume for now that this will only be used during 987 * initialization and not for per-transaction buffer mapping. 988 */ 989 bus_dma_segment_t stack_sg; 990 991 stack_sg.ds_addr = map; 992 stack_sg.ds_len = dmat->maxsize; 993 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 994 return (0); 995 } 996 997 void 998 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 999 { 1000 } 1001 1002 int 1003 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 1004 { 1005 /* Nothing to do */ 1006 return (0); 1007 } 1008 1009 /********************* Platform Dependent Functions ***************************/ 1010 static void 1011 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 1012 { 1013 1014 if ((instance >= 0) 1015 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { 1016 uint8_t *iocell_info; 1017 1018 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 1019 iocell_info[index] = value & 0xFFFF; 1020 if (bootverbose) 1021 printf("iocell[%d:%ld] = %d\n", instance, index, value); 1022 } 1023 } 1024 1025 static void 1026 ahd_linux_setup_tag_info_global(char *p) 1027 { 1028 int tags, i, j; 1029 1030 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 1031 printf("Setting Global Tags= %d\n", tags); 1032 1033 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { 1034 for (j = 0; j < AHD_NUM_TARGETS; j++) { 1035 aic79xx_tag_info[i].tag_commands[j] = tags; 1036 } 1037 } 1038 } 1039 1040 static void 1041 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 1042 { 1043 1044 if ((instance >= 0) && (targ >= 0) 1045 && (instance < ARRAY_SIZE(aic79xx_tag_info)) 1046 && (targ < AHD_NUM_TARGETS)) { 1047 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 1048 if (bootverbose) 1049 printf("tag_info[%d:%d] = %d\n", instance, targ, value); 1050 } 1051 } 1052 1053 static char * 1054 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 1055 void (*callback)(u_long, int, int, int32_t), 1056 u_long callback_arg) 1057 { 1058 char *tok_end; 1059 char *tok_end2; 1060 int i; 1061 int instance; 1062 int targ; 1063 int done; 1064 char tok_list[] = {'.', ',', '{', '}', '\0'}; 1065 1066 /* All options use a ':' name/arg separator */ 1067 if (*opt_arg != ':') 1068 return (opt_arg); 1069 opt_arg++; 1070 instance = -1; 1071 targ = -1; 1072 done = FALSE; 1073 /* 1074 * Restore separator that may be in 1075 * the middle of our option argument. 1076 */ 1077 tok_end = strchr(opt_arg, '\0'); 1078 if (tok_end < end) 1079 *tok_end = ','; 1080 while (!done) { 1081 switch (*opt_arg) { 1082 case '{': 1083 if (instance == -1) { 1084 instance = 0; 1085 } else { 1086 if (depth > 1) { 1087 if (targ == -1) 1088 targ = 0; 1089 } else { 1090 printf("Malformed Option %s\n", 1091 opt_name); 1092 done = TRUE; 1093 } 1094 } 1095 opt_arg++; 1096 break; 1097 case '}': 1098 if (targ != -1) 1099 targ = -1; 1100 else if (instance != -1) 1101 instance = -1; 1102 opt_arg++; 1103 break; 1104 case ',': 1105 case '.': 1106 if (instance == -1) 1107 done = TRUE; 1108 else if (targ >= 0) 1109 targ++; 1110 else if (instance >= 0) 1111 instance++; 1112 opt_arg++; 1113 break; 1114 case '\0': 1115 done = TRUE; 1116 break; 1117 default: 1118 tok_end = end; 1119 for (i = 0; tok_list[i]; i++) { 1120 tok_end2 = strchr(opt_arg, tok_list[i]); 1121 if ((tok_end2) && (tok_end2 < tok_end)) 1122 tok_end = tok_end2; 1123 } 1124 callback(callback_arg, instance, targ, 1125 simple_strtol(opt_arg, NULL, 0)); 1126 opt_arg = tok_end; 1127 break; 1128 } 1129 } 1130 return (opt_arg); 1131 } 1132 1133 /* 1134 * Handle Linux boot parameters. This routine allows for assigning a value 1135 * to a parameter with a ':' between the parameter and the value. 1136 * ie. aic79xx=stpwlev:1,extended 1137 */ 1138 static int 1139 aic79xx_setup(char *s) 1140 { 1141 int i, n; 1142 char *p; 1143 char *end; 1144 1145 static const struct { 1146 const char *name; 1147 uint32_t *flag; 1148 } options[] = { 1149 { "extended", &aic79xx_extended }, 1150 { "no_reset", &aic79xx_no_reset }, 1151 { "verbose", &aic79xx_verbose }, 1152 { "allow_memio", &aic79xx_allow_memio}, 1153 #ifdef AHD_DEBUG 1154 { "debug", &ahd_debug }, 1155 #endif 1156 { "periodic_otag", &aic79xx_periodic_otag }, 1157 { "pci_parity", &aic79xx_pci_parity }, 1158 { "seltime", &aic79xx_seltime }, 1159 { "tag_info", NULL }, 1160 { "global_tag_depth", NULL}, 1161 { "slewrate", NULL }, 1162 { "precomp", NULL }, 1163 { "amplitude", NULL }, 1164 { "slowcrc", &aic79xx_slowcrc }, 1165 }; 1166 1167 end = strchr(s, '\0'); 1168 1169 /* 1170 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1171 * will never be 0 in this case. 1172 */ 1173 n = 0; 1174 1175 while ((p = strsep(&s, ",.")) != NULL) { 1176 if (*p == '\0') 1177 continue; 1178 for (i = 0; i < ARRAY_SIZE(options); i++) { 1179 1180 n = strlen(options[i].name); 1181 if (strncmp(options[i].name, p, n) == 0) 1182 break; 1183 } 1184 if (i == ARRAY_SIZE(options)) 1185 continue; 1186 1187 if (strncmp(p, "global_tag_depth", n) == 0) { 1188 ahd_linux_setup_tag_info_global(p + n); 1189 } else if (strncmp(p, "tag_info", n) == 0) { 1190 s = ahd_parse_brace_option("tag_info", p + n, end, 1191 2, ahd_linux_setup_tag_info, 0); 1192 } else if (strncmp(p, "slewrate", n) == 0) { 1193 s = ahd_parse_brace_option("slewrate", 1194 p + n, end, 1, ahd_linux_setup_iocell_info, 1195 AIC79XX_SLEWRATE_INDEX); 1196 } else if (strncmp(p, "precomp", n) == 0) { 1197 s = ahd_parse_brace_option("precomp", 1198 p + n, end, 1, ahd_linux_setup_iocell_info, 1199 AIC79XX_PRECOMP_INDEX); 1200 } else if (strncmp(p, "amplitude", n) == 0) { 1201 s = ahd_parse_brace_option("amplitude", 1202 p + n, end, 1, ahd_linux_setup_iocell_info, 1203 AIC79XX_AMPLITUDE_INDEX); 1204 } else if (p[n] == ':') { 1205 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1206 } else if (!strncmp(p, "verbose", n)) { 1207 *(options[i].flag) = 1; 1208 } else { 1209 *(options[i].flag) ^= 0xFFFFFFFF; 1210 } 1211 } 1212 return 1; 1213 } 1214 1215 __setup("aic79xx=", aic79xx_setup); 1216 1217 uint32_t aic79xx_verbose; 1218 1219 int 1220 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1221 { 1222 char buf[80]; 1223 struct Scsi_Host *host; 1224 char *new_name; 1225 u_long s; 1226 int retval; 1227 1228 template->name = ahd->description; 1229 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1230 if (host == NULL) 1231 return (ENOMEM); 1232 1233 *((struct ahd_softc **)host->hostdata) = ahd; 1234 ahd->platform_data->host = host; 1235 host->can_queue = AHD_MAX_QUEUE; 1236 host->cmd_per_lun = 2; 1237 host->sg_tablesize = AHD_NSEG; 1238 host->this_id = ahd->our_id; 1239 host->irq = ahd->platform_data->irq; 1240 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1241 host->max_lun = AHD_NUM_LUNS; 1242 host->max_channel = 0; 1243 host->sg_tablesize = AHD_NSEG; 1244 ahd_lock(ahd, &s); 1245 ahd_set_unit(ahd, ahd_linux_unit++); 1246 ahd_unlock(ahd, &s); 1247 sprintf(buf, "scsi%d", host->host_no); 1248 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 1249 if (new_name != NULL) { 1250 strcpy(new_name, buf); 1251 ahd_set_name(ahd, new_name); 1252 } 1253 host->unique_id = ahd->unit; 1254 ahd_linux_initialize_scsi_bus(ahd); 1255 ahd_intr_enable(ahd, TRUE); 1256 1257 host->transportt = ahd_linux_transport_template; 1258 1259 retval = scsi_add_host(host, &ahd->dev_softc->dev); 1260 if (retval) { 1261 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); 1262 scsi_host_put(host); 1263 return retval; 1264 } 1265 1266 scsi_scan_host(host); 1267 return 0; 1268 } 1269 1270 /* 1271 * Place the SCSI bus into a known state by either resetting it, 1272 * or forcing transfer negotiations on the next command to any 1273 * target. 1274 */ 1275 static void 1276 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1277 { 1278 u_int target_id; 1279 u_int numtarg; 1280 unsigned long s; 1281 1282 target_id = 0; 1283 numtarg = 0; 1284 1285 if (aic79xx_no_reset != 0) 1286 ahd->flags &= ~AHD_RESET_BUS_A; 1287 1288 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1289 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1290 else 1291 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1292 1293 ahd_lock(ahd, &s); 1294 1295 /* 1296 * Force negotiation to async for all targets that 1297 * will not see an initial bus reset. 1298 */ 1299 for (; target_id < numtarg; target_id++) { 1300 struct ahd_devinfo devinfo; 1301 struct ahd_initiator_tinfo *tinfo; 1302 struct ahd_tmode_tstate *tstate; 1303 1304 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1305 target_id, &tstate); 1306 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1307 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1308 ahd_update_neg_request(ahd, &devinfo, tstate, 1309 tinfo, AHD_NEG_ALWAYS); 1310 } 1311 ahd_unlock(ahd, &s); 1312 /* Give the bus some time to recover */ 1313 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1314 ahd_freeze_simq(ahd); 1315 msleep(AIC79XX_RESET_DELAY); 1316 ahd_release_simq(ahd); 1317 } 1318 } 1319 1320 int 1321 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1322 { 1323 ahd->platform_data = 1324 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT); 1325 if (ahd->platform_data == NULL) 1326 return (ENOMEM); 1327 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data)); 1328 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1329 ahd_lockinit(ahd); 1330 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1331 return (0); 1332 } 1333 1334 void 1335 ahd_platform_free(struct ahd_softc *ahd) 1336 { 1337 struct scsi_target *starget; 1338 int i; 1339 1340 if (ahd->platform_data != NULL) { 1341 /* destroy all of the device and target objects */ 1342 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1343 starget = ahd->platform_data->starget[i]; 1344 if (starget != NULL) { 1345 ahd->platform_data->starget[i] = NULL; 1346 } 1347 } 1348 1349 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1350 free_irq(ahd->platform_data->irq, ahd); 1351 if (ahd->tags[0] == BUS_SPACE_PIO 1352 && ahd->bshs[0].ioport != 0) 1353 release_region(ahd->bshs[0].ioport, 256); 1354 if (ahd->tags[1] == BUS_SPACE_PIO 1355 && ahd->bshs[1].ioport != 0) 1356 release_region(ahd->bshs[1].ioport, 256); 1357 if (ahd->tags[0] == BUS_SPACE_MEMIO 1358 && ahd->bshs[0].maddr != NULL) { 1359 iounmap(ahd->bshs[0].maddr); 1360 release_mem_region(ahd->platform_data->mem_busaddr, 1361 0x1000); 1362 } 1363 if (ahd->platform_data->host) 1364 scsi_host_put(ahd->platform_data->host); 1365 1366 free(ahd->platform_data, M_DEVBUF); 1367 } 1368 } 1369 1370 void 1371 ahd_platform_init(struct ahd_softc *ahd) 1372 { 1373 /* 1374 * Lookup and commit any modified IO Cell options. 1375 */ 1376 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 1377 const struct ahd_linux_iocell_opts *iocell_opts; 1378 1379 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1380 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1381 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1382 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1383 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1384 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1385 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1386 } 1387 1388 } 1389 1390 void 1391 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1392 { 1393 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1394 SCB_GET_CHANNEL(ahd, scb), 1395 SCB_GET_LUN(scb), SCB_LIST_NULL, 1396 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1397 } 1398 1399 void 1400 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev, 1401 struct ahd_devinfo *devinfo, ahd_queue_alg alg) 1402 { 1403 struct ahd_linux_device *dev; 1404 int was_queuing; 1405 int now_queuing; 1406 1407 if (sdev == NULL) 1408 return; 1409 1410 dev = scsi_transport_device_data(sdev); 1411 1412 if (dev == NULL) 1413 return; 1414 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1415 switch (alg) { 1416 default: 1417 case AHD_QUEUE_NONE: 1418 now_queuing = 0; 1419 break; 1420 case AHD_QUEUE_BASIC: 1421 now_queuing = AHD_DEV_Q_BASIC; 1422 break; 1423 case AHD_QUEUE_TAGGED: 1424 now_queuing = AHD_DEV_Q_TAGGED; 1425 break; 1426 } 1427 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1428 && (was_queuing != now_queuing) 1429 && (dev->active != 0)) { 1430 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1431 dev->qfrozen++; 1432 } 1433 1434 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1435 if (now_queuing) { 1436 u_int usertags; 1437 1438 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1439 if (!was_queuing) { 1440 /* 1441 * Start out agressively and allow our 1442 * dynamic queue depth algorithm to take 1443 * care of the rest. 1444 */ 1445 dev->maxtags = usertags; 1446 dev->openings = dev->maxtags - dev->active; 1447 } 1448 if (dev->maxtags == 0) { 1449 /* 1450 * Queueing is disabled by the user. 1451 */ 1452 dev->openings = 1; 1453 } else if (alg == AHD_QUEUE_TAGGED) { 1454 dev->flags |= AHD_DEV_Q_TAGGED; 1455 if (aic79xx_periodic_otag != 0) 1456 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1457 } else 1458 dev->flags |= AHD_DEV_Q_BASIC; 1459 } else { 1460 /* We can only have one opening. */ 1461 dev->maxtags = 0; 1462 dev->openings = 1 - dev->active; 1463 } 1464 1465 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1466 case AHD_DEV_Q_BASIC: 1467 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK); 1468 scsi_activate_tcq(sdev, dev->openings + dev->active); 1469 break; 1470 case AHD_DEV_Q_TAGGED: 1471 scsi_set_tag_type(sdev, MSG_ORDERED_TASK); 1472 scsi_activate_tcq(sdev, dev->openings + dev->active); 1473 break; 1474 default: 1475 /* 1476 * We allow the OS to queue 2 untagged transactions to 1477 * us at any time even though we can only execute them 1478 * serially on the controller/device. This should 1479 * remove some latency. 1480 */ 1481 scsi_deactivate_tcq(sdev, 1); 1482 break; 1483 } 1484 } 1485 1486 int 1487 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1488 int lun, u_int tag, role_t role, uint32_t status) 1489 { 1490 return 0; 1491 } 1492 1493 static u_int 1494 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1495 { 1496 static int warned_user; 1497 u_int tags; 1498 1499 tags = 0; 1500 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1501 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { 1502 1503 if (warned_user == 0) { 1504 printf(KERN_WARNING 1505 "aic79xx: WARNING: Insufficient tag_info instances\n" 1506 "aic79xx: for installed controllers. Using defaults\n" 1507 "aic79xx: Please update the aic79xx_tag_info array in\n" 1508 "aic79xx: the aic79xx_osm.c source file.\n"); 1509 warned_user++; 1510 } 1511 tags = AHD_MAX_QUEUE; 1512 } else { 1513 adapter_tag_info_t *tag_info; 1514 1515 tag_info = &aic79xx_tag_info[ahd->unit]; 1516 tags = tag_info->tag_commands[devinfo->target_offset]; 1517 if (tags > AHD_MAX_QUEUE) 1518 tags = AHD_MAX_QUEUE; 1519 } 1520 } 1521 return (tags); 1522 } 1523 1524 /* 1525 * Determines the queue depth for a given device. 1526 */ 1527 static void 1528 ahd_linux_device_queue_depth(struct scsi_device *sdev) 1529 { 1530 struct ahd_devinfo devinfo; 1531 u_int tags; 1532 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1533 1534 ahd_compile_devinfo(&devinfo, 1535 ahd->our_id, 1536 sdev->sdev_target->id, sdev->lun, 1537 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1538 ROLE_INITIATOR); 1539 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1540 if (tags != 0 && sdev->tagged_supported != 0) { 1541 1542 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); 1543 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1544 devinfo.lun, AC_TRANSFER_NEG); 1545 ahd_print_devinfo(ahd, &devinfo); 1546 printf("Tagged Queuing enabled. Depth %d\n", tags); 1547 } else { 1548 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); 1549 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1550 devinfo.lun, AC_TRANSFER_NEG); 1551 } 1552 } 1553 1554 static int 1555 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1556 struct scsi_cmnd *cmd) 1557 { 1558 struct scb *scb; 1559 struct hardware_scb *hscb; 1560 struct ahd_initiator_tinfo *tinfo; 1561 struct ahd_tmode_tstate *tstate; 1562 u_int col_idx; 1563 uint16_t mask; 1564 unsigned long flags; 1565 int nseg; 1566 1567 nseg = scsi_dma_map(cmd); 1568 if (nseg < 0) 1569 return SCSI_MLQUEUE_HOST_BUSY; 1570 1571 ahd_lock(ahd, &flags); 1572 1573 /* 1574 * Get an scb to use. 1575 */ 1576 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1577 cmd->device->id, &tstate); 1578 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1579 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1580 col_idx = AHD_NEVER_COL_IDX; 1581 } else { 1582 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1583 cmd->device->lun); 1584 } 1585 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1586 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1587 ahd_unlock(ahd, &flags); 1588 scsi_dma_unmap(cmd); 1589 return SCSI_MLQUEUE_HOST_BUSY; 1590 } 1591 1592 scb->io_ctx = cmd; 1593 scb->platform_data->dev = dev; 1594 hscb = scb->hscb; 1595 cmd->host_scribble = (char *)scb; 1596 1597 /* 1598 * Fill out basics of the HSCB. 1599 */ 1600 hscb->control = 0; 1601 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1602 hscb->lun = cmd->device->lun; 1603 scb->hscb->task_management = 0; 1604 mask = SCB_GET_TARGET_MASK(ahd, scb); 1605 1606 if ((ahd->user_discenable & mask) != 0) 1607 hscb->control |= DISCENB; 1608 1609 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1610 scb->flags |= SCB_PACKETIZED; 1611 1612 if ((tstate->auto_negotiate & mask) != 0) { 1613 scb->flags |= SCB_AUTO_NEGOTIATE; 1614 scb->hscb->control |= MK_MESSAGE; 1615 } 1616 1617 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1618 int msg_bytes; 1619 uint8_t tag_msgs[2]; 1620 1621 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1622 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1623 hscb->control |= tag_msgs[0]; 1624 if (tag_msgs[0] == MSG_ORDERED_TASK) 1625 dev->commands_since_idle_or_otag = 0; 1626 } else 1627 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1628 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1629 hscb->control |= MSG_ORDERED_TASK; 1630 dev->commands_since_idle_or_otag = 0; 1631 } else { 1632 hscb->control |= MSG_SIMPLE_TASK; 1633 } 1634 } 1635 1636 hscb->cdb_len = cmd->cmd_len; 1637 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1638 1639 scb->platform_data->xfer_len = 0; 1640 ahd_set_residual(scb, 0); 1641 ahd_set_sense_residual(scb, 0); 1642 scb->sg_count = 0; 1643 1644 if (nseg > 0) { 1645 void *sg = scb->sg_list; 1646 struct scatterlist *cur_seg; 1647 int i; 1648 1649 scb->platform_data->xfer_len = 0; 1650 1651 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1652 dma_addr_t addr; 1653 bus_size_t len; 1654 1655 addr = sg_dma_address(cur_seg); 1656 len = sg_dma_len(cur_seg); 1657 scb->platform_data->xfer_len += len; 1658 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1659 i == (nseg - 1)); 1660 } 1661 } 1662 1663 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1664 dev->openings--; 1665 dev->active++; 1666 dev->commands_issued++; 1667 1668 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1669 dev->commands_since_idle_or_otag++; 1670 scb->flags |= SCB_ACTIVE; 1671 ahd_queue_scb(ahd, scb); 1672 1673 ahd_unlock(ahd, &flags); 1674 1675 return 0; 1676 } 1677 1678 /* 1679 * SCSI controller interrupt handler. 1680 */ 1681 irqreturn_t 1682 ahd_linux_isr(int irq, void *dev_id) 1683 { 1684 struct ahd_softc *ahd; 1685 u_long flags; 1686 int ours; 1687 1688 ahd = (struct ahd_softc *) dev_id; 1689 ahd_lock(ahd, &flags); 1690 ours = ahd_intr(ahd); 1691 ahd_unlock(ahd, &flags); 1692 return IRQ_RETVAL(ours); 1693 } 1694 1695 void 1696 ahd_send_async(struct ahd_softc *ahd, char channel, 1697 u_int target, u_int lun, ac_code code) 1698 { 1699 switch (code) { 1700 case AC_TRANSFER_NEG: 1701 { 1702 char buf[80]; 1703 struct scsi_target *starget; 1704 struct info_str info; 1705 struct ahd_initiator_tinfo *tinfo; 1706 struct ahd_tmode_tstate *tstate; 1707 unsigned int target_ppr_options; 1708 1709 BUG_ON(target == CAM_TARGET_WILDCARD); 1710 1711 info.buffer = buf; 1712 info.length = sizeof(buf); 1713 info.offset = 0; 1714 info.pos = 0; 1715 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1716 target, &tstate); 1717 1718 /* 1719 * Don't bother reporting results while 1720 * negotiations are still pending. 1721 */ 1722 if (tinfo->curr.period != tinfo->goal.period 1723 || tinfo->curr.width != tinfo->goal.width 1724 || tinfo->curr.offset != tinfo->goal.offset 1725 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1726 if (bootverbose == 0) 1727 break; 1728 1729 /* 1730 * Don't bother reporting results that 1731 * are identical to those last reported. 1732 */ 1733 starget = ahd->platform_data->starget[target]; 1734 if (starget == NULL) 1735 break; 1736 1737 target_ppr_options = 1738 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1739 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1740 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1741 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1742 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1743 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1744 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1745 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1746 1747 if (tinfo->curr.period == spi_period(starget) 1748 && tinfo->curr.width == spi_width(starget) 1749 && tinfo->curr.offset == spi_offset(starget) 1750 && tinfo->curr.ppr_options == target_ppr_options) 1751 if (bootverbose == 0) 1752 break; 1753 1754 spi_period(starget) = tinfo->curr.period; 1755 spi_width(starget) = tinfo->curr.width; 1756 spi_offset(starget) = tinfo->curr.offset; 1757 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1758 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1759 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1760 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1761 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1762 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1763 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1764 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1765 spi_display_xfer_agreement(starget); 1766 break; 1767 } 1768 case AC_SENT_BDR: 1769 { 1770 WARN_ON(lun != CAM_LUN_WILDCARD); 1771 scsi_report_device_reset(ahd->platform_data->host, 1772 channel - 'A', target); 1773 break; 1774 } 1775 case AC_BUS_RESET: 1776 if (ahd->platform_data->host != NULL) { 1777 scsi_report_bus_reset(ahd->platform_data->host, 1778 channel - 'A'); 1779 } 1780 break; 1781 default: 1782 panic("ahd_send_async: Unexpected async event"); 1783 } 1784 } 1785 1786 /* 1787 * Calls the higher level scsi done function and frees the scb. 1788 */ 1789 void 1790 ahd_done(struct ahd_softc *ahd, struct scb *scb) 1791 { 1792 struct scsi_cmnd *cmd; 1793 struct ahd_linux_device *dev; 1794 1795 if ((scb->flags & SCB_ACTIVE) == 0) { 1796 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1797 ahd_dump_card_state(ahd); 1798 panic("Stopping for safety"); 1799 } 1800 LIST_REMOVE(scb, pending_links); 1801 cmd = scb->io_ctx; 1802 dev = scb->platform_data->dev; 1803 dev->active--; 1804 dev->openings++; 1805 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1806 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1807 dev->qfrozen--; 1808 } 1809 ahd_linux_unmap_scb(ahd, scb); 1810 1811 /* 1812 * Guard against stale sense data. 1813 * The Linux mid-layer assumes that sense 1814 * was retrieved anytime the first byte of 1815 * the sense buffer looks "sane". 1816 */ 1817 cmd->sense_buffer[0] = 0; 1818 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1819 uint32_t amount_xferred; 1820 1821 amount_xferred = 1822 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1823 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1824 #ifdef AHD_DEBUG 1825 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1826 ahd_print_path(ahd, scb); 1827 printf("Set CAM_UNCOR_PARITY\n"); 1828 } 1829 #endif 1830 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1831 #ifdef AHD_REPORT_UNDERFLOWS 1832 /* 1833 * This code is disabled by default as some 1834 * clients of the SCSI system do not properly 1835 * initialize the underflow parameter. This 1836 * results in spurious termination of commands 1837 * that complete as expected (e.g. underflow is 1838 * allowed as command can return variable amounts 1839 * of data. 1840 */ 1841 } else if (amount_xferred < scb->io_ctx->underflow) { 1842 u_int i; 1843 1844 ahd_print_path(ahd, scb); 1845 printf("CDB:"); 1846 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1847 printf(" 0x%x", scb->io_ctx->cmnd[i]); 1848 printf("\n"); 1849 ahd_print_path(ahd, scb); 1850 printf("Saw underflow (%ld of %ld bytes). " 1851 "Treated as error\n", 1852 ahd_get_residual(scb), 1853 ahd_get_transfer_length(scb)); 1854 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1855 #endif 1856 } else { 1857 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1858 } 1859 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1860 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1861 } 1862 1863 if (dev->openings == 1 1864 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1865 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1866 dev->tag_success_count++; 1867 /* 1868 * Some devices deal with temporary internal resource 1869 * shortages by returning queue full. When the queue 1870 * full occurrs, we throttle back. Slowly try to get 1871 * back to our previous queue depth. 1872 */ 1873 if ((dev->openings + dev->active) < dev->maxtags 1874 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1875 dev->tag_success_count = 0; 1876 dev->openings++; 1877 } 1878 1879 if (dev->active == 0) 1880 dev->commands_since_idle_or_otag = 0; 1881 1882 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1883 printf("Recovery SCB completes\n"); 1884 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1885 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1886 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1887 1888 if (ahd->platform_data->eh_done) 1889 complete(ahd->platform_data->eh_done); 1890 } 1891 1892 ahd_free_scb(ahd, scb); 1893 ahd_linux_queue_cmd_complete(ahd, cmd); 1894 } 1895 1896 static void 1897 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1898 struct scsi_device *sdev, struct scb *scb) 1899 { 1900 struct ahd_devinfo devinfo; 1901 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1902 1903 ahd_compile_devinfo(&devinfo, 1904 ahd->our_id, 1905 sdev->sdev_target->id, sdev->lun, 1906 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1907 ROLE_INITIATOR); 1908 1909 /* 1910 * We don't currently trust the mid-layer to 1911 * properly deal with queue full or busy. So, 1912 * when one occurs, we tell the mid-layer to 1913 * unconditionally requeue the command to us 1914 * so that we can retry it ourselves. We also 1915 * implement our own throttling mechanism so 1916 * we don't clobber the device with too many 1917 * commands. 1918 */ 1919 switch (ahd_get_scsi_status(scb)) { 1920 default: 1921 break; 1922 case SCSI_STATUS_CHECK_COND: 1923 case SCSI_STATUS_CMD_TERMINATED: 1924 { 1925 struct scsi_cmnd *cmd; 1926 1927 /* 1928 * Copy sense information to the OS's cmd 1929 * structure if it is available. 1930 */ 1931 cmd = scb->io_ctx; 1932 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1933 struct scsi_status_iu_header *siu; 1934 u_int sense_size; 1935 u_int sense_offset; 1936 1937 if (scb->flags & SCB_SENSE) { 1938 sense_size = min(sizeof(struct scsi_sense_data) 1939 - ahd_get_sense_residual(scb), 1940 (u_long)SCSI_SENSE_BUFFERSIZE); 1941 sense_offset = 0; 1942 } else { 1943 /* 1944 * Copy only the sense data into the provided 1945 * buffer. 1946 */ 1947 siu = (struct scsi_status_iu_header *) 1948 scb->sense_data; 1949 sense_size = min_t(size_t, 1950 scsi_4btoul(siu->sense_length), 1951 SCSI_SENSE_BUFFERSIZE); 1952 sense_offset = SIU_SENSE_OFFSET(siu); 1953 } 1954 1955 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1956 memcpy(cmd->sense_buffer, 1957 ahd_get_sense_buf(ahd, scb) 1958 + sense_offset, sense_size); 1959 cmd->result |= (DRIVER_SENSE << 24); 1960 1961 #ifdef AHD_DEBUG 1962 if (ahd_debug & AHD_SHOW_SENSE) { 1963 int i; 1964 1965 printf("Copied %d bytes of sense data at %d:", 1966 sense_size, sense_offset); 1967 for (i = 0; i < sense_size; i++) { 1968 if ((i & 0xF) == 0) 1969 printf("\n"); 1970 printf("0x%x ", cmd->sense_buffer[i]); 1971 } 1972 printf("\n"); 1973 } 1974 #endif 1975 } 1976 break; 1977 } 1978 case SCSI_STATUS_QUEUE_FULL: 1979 /* 1980 * By the time the core driver has returned this 1981 * command, all other commands that were queued 1982 * to us but not the device have been returned. 1983 * This ensures that dev->active is equal to 1984 * the number of commands actually queued to 1985 * the device. 1986 */ 1987 dev->tag_success_count = 0; 1988 if (dev->active != 0) { 1989 /* 1990 * Drop our opening count to the number 1991 * of commands currently outstanding. 1992 */ 1993 dev->openings = 0; 1994 #ifdef AHD_DEBUG 1995 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1996 ahd_print_path(ahd, scb); 1997 printf("Dropping tag count to %d\n", 1998 dev->active); 1999 } 2000 #endif 2001 if (dev->active == dev->tags_on_last_queuefull) { 2002 2003 dev->last_queuefull_same_count++; 2004 /* 2005 * If we repeatedly see a queue full 2006 * at the same queue depth, this 2007 * device has a fixed number of tag 2008 * slots. Lock in this tag depth 2009 * so we stop seeing queue fulls from 2010 * this device. 2011 */ 2012 if (dev->last_queuefull_same_count 2013 == AHD_LOCK_TAGS_COUNT) { 2014 dev->maxtags = dev->active; 2015 ahd_print_path(ahd, scb); 2016 printf("Locking max tag count at %d\n", 2017 dev->active); 2018 } 2019 } else { 2020 dev->tags_on_last_queuefull = dev->active; 2021 dev->last_queuefull_same_count = 0; 2022 } 2023 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 2024 ahd_set_scsi_status(scb, SCSI_STATUS_OK); 2025 ahd_platform_set_tags(ahd, sdev, &devinfo, 2026 (dev->flags & AHD_DEV_Q_BASIC) 2027 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2028 break; 2029 } 2030 /* 2031 * Drop down to a single opening, and treat this 2032 * as if the target returned BUSY SCSI status. 2033 */ 2034 dev->openings = 1; 2035 ahd_platform_set_tags(ahd, sdev, &devinfo, 2036 (dev->flags & AHD_DEV_Q_BASIC) 2037 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2038 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); 2039 } 2040 } 2041 2042 static void 2043 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 2044 { 2045 int status; 2046 int new_status = DID_OK; 2047 int do_fallback = 0; 2048 int scsi_status; 2049 2050 /* 2051 * Map CAM error codes into Linux Error codes. We 2052 * avoid the conversion so that the DV code has the 2053 * full error information available when making 2054 * state change decisions. 2055 */ 2056 2057 status = ahd_cmd_get_transaction_status(cmd); 2058 switch (status) { 2059 case CAM_REQ_INPROG: 2060 case CAM_REQ_CMP: 2061 new_status = DID_OK; 2062 break; 2063 case CAM_AUTOSENSE_FAIL: 2064 new_status = DID_ERROR; 2065 /* Fallthrough */ 2066 case CAM_SCSI_STATUS_ERROR: 2067 scsi_status = ahd_cmd_get_scsi_status(cmd); 2068 2069 switch(scsi_status) { 2070 case SCSI_STATUS_CMD_TERMINATED: 2071 case SCSI_STATUS_CHECK_COND: 2072 if ((cmd->result >> 24) != DRIVER_SENSE) { 2073 do_fallback = 1; 2074 } else { 2075 struct scsi_sense_data *sense; 2076 2077 sense = (struct scsi_sense_data *) 2078 cmd->sense_buffer; 2079 if (sense->extra_len >= 5 && 2080 (sense->add_sense_code == 0x47 2081 || sense->add_sense_code == 0x48)) 2082 do_fallback = 1; 2083 } 2084 break; 2085 default: 2086 break; 2087 } 2088 break; 2089 case CAM_REQ_ABORTED: 2090 new_status = DID_ABORT; 2091 break; 2092 case CAM_BUSY: 2093 new_status = DID_BUS_BUSY; 2094 break; 2095 case CAM_REQ_INVALID: 2096 case CAM_PATH_INVALID: 2097 new_status = DID_BAD_TARGET; 2098 break; 2099 case CAM_SEL_TIMEOUT: 2100 new_status = DID_NO_CONNECT; 2101 break; 2102 case CAM_SCSI_BUS_RESET: 2103 case CAM_BDR_SENT: 2104 new_status = DID_RESET; 2105 break; 2106 case CAM_UNCOR_PARITY: 2107 new_status = DID_PARITY; 2108 do_fallback = 1; 2109 break; 2110 case CAM_CMD_TIMEOUT: 2111 new_status = DID_TIME_OUT; 2112 do_fallback = 1; 2113 break; 2114 case CAM_REQ_CMP_ERR: 2115 case CAM_UNEXP_BUSFREE: 2116 case CAM_DATA_RUN_ERR: 2117 new_status = DID_ERROR; 2118 do_fallback = 1; 2119 break; 2120 case CAM_UA_ABORT: 2121 case CAM_NO_HBA: 2122 case CAM_SEQUENCE_FAIL: 2123 case CAM_CCB_LEN_ERR: 2124 case CAM_PROVIDE_FAIL: 2125 case CAM_REQ_TERMIO: 2126 case CAM_UNREC_HBA_ERROR: 2127 case CAM_REQ_TOO_BIG: 2128 new_status = DID_ERROR; 2129 break; 2130 case CAM_REQUEUE_REQ: 2131 new_status = DID_REQUEUE; 2132 break; 2133 default: 2134 /* We should never get here */ 2135 new_status = DID_ERROR; 2136 break; 2137 } 2138 2139 if (do_fallback) { 2140 printf("%s: device overrun (status %x) on %d:%d:%d\n", 2141 ahd_name(ahd), status, cmd->device->channel, 2142 cmd->device->id, cmd->device->lun); 2143 } 2144 2145 ahd_cmd_set_transaction_status(cmd, new_status); 2146 2147 cmd->scsi_done(cmd); 2148 } 2149 2150 static void 2151 ahd_freeze_simq(struct ahd_softc *ahd) 2152 { 2153 scsi_block_requests(ahd->platform_data->host); 2154 } 2155 2156 static void 2157 ahd_release_simq(struct ahd_softc *ahd) 2158 { 2159 scsi_unblock_requests(ahd->platform_data->host); 2160 } 2161 2162 static int 2163 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2164 { 2165 struct ahd_softc *ahd; 2166 struct ahd_linux_device *dev; 2167 struct scb *pending_scb; 2168 u_int saved_scbptr; 2169 u_int active_scbptr; 2170 u_int last_phase; 2171 u_int saved_scsiid; 2172 u_int cdb_byte; 2173 int retval; 2174 int was_paused; 2175 int paused; 2176 int wait; 2177 int disconnected; 2178 ahd_mode_state saved_modes; 2179 unsigned long flags; 2180 2181 pending_scb = NULL; 2182 paused = FALSE; 2183 wait = FALSE; 2184 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2185 2186 scmd_printk(KERN_INFO, cmd, 2187 "Attempting to queue an ABORT message:"); 2188 2189 printf("CDB:"); 2190 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2191 printf(" 0x%x", cmd->cmnd[cdb_byte]); 2192 printf("\n"); 2193 2194 ahd_lock(ahd, &flags); 2195 2196 /* 2197 * First determine if we currently own this command. 2198 * Start by searching the device queue. If not found 2199 * there, check the pending_scb list. If not found 2200 * at all, and the system wanted us to just abort the 2201 * command, return success. 2202 */ 2203 dev = scsi_transport_device_data(cmd->device); 2204 2205 if (dev == NULL) { 2206 /* 2207 * No target device for this command exists, 2208 * so we must not still own the command. 2209 */ 2210 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2211 retval = SUCCESS; 2212 goto no_cmd; 2213 } 2214 2215 /* 2216 * See if we can find a matching cmd in the pending list. 2217 */ 2218 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2219 if (pending_scb->io_ctx == cmd) 2220 break; 2221 } 2222 2223 if (pending_scb == NULL) { 2224 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2225 goto no_cmd; 2226 } 2227 2228 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2229 /* 2230 * We can't queue two recovery actions using the same SCB 2231 */ 2232 retval = FAILED; 2233 goto done; 2234 } 2235 2236 /* 2237 * Ensure that the card doesn't do anything 2238 * behind our back. Also make sure that we 2239 * didn't "just" miss an interrupt that would 2240 * affect this cmd. 2241 */ 2242 was_paused = ahd_is_paused(ahd); 2243 ahd_pause_and_flushwork(ahd); 2244 paused = TRUE; 2245 2246 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2247 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2248 goto no_cmd; 2249 } 2250 2251 printf("%s: At time of recovery, card was %spaused\n", 2252 ahd_name(ahd), was_paused ? "" : "not "); 2253 ahd_dump_card_state(ahd); 2254 2255 disconnected = TRUE; 2256 if (ahd_search_qinfifo(ahd, cmd->device->id, 2257 cmd->device->channel + 'A', 2258 cmd->device->lun, 2259 pending_scb->hscb->tag, 2260 ROLE_INITIATOR, CAM_REQ_ABORTED, 2261 SEARCH_COMPLETE) > 0) { 2262 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2263 ahd_name(ahd), cmd->device->channel, 2264 cmd->device->id, cmd->device->lun); 2265 retval = SUCCESS; 2266 goto done; 2267 } 2268 2269 saved_modes = ahd_save_modes(ahd); 2270 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2271 last_phase = ahd_inb(ahd, LASTPHASE); 2272 saved_scbptr = ahd_get_scbptr(ahd); 2273 active_scbptr = saved_scbptr; 2274 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2275 struct scb *bus_scb; 2276 2277 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2278 if (bus_scb == pending_scb) 2279 disconnected = FALSE; 2280 } 2281 2282 /* 2283 * At this point, pending_scb is the scb associated with the 2284 * passed in command. That command is currently active on the 2285 * bus or is in the disconnected state. 2286 */ 2287 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); 2288 if (last_phase != P_BUSFREE 2289 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2290 2291 /* 2292 * We're active on the bus, so assert ATN 2293 * and hope that the target responds. 2294 */ 2295 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2296 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2297 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2298 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2299 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2300 wait = TRUE; 2301 } else if (disconnected) { 2302 2303 /* 2304 * Actually re-queue this SCB in an attempt 2305 * to select the device before it reconnects. 2306 */ 2307 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2308 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2309 pending_scb->hscb->cdb_len = 0; 2310 pending_scb->hscb->task_attribute = 0; 2311 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2312 2313 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2314 /* 2315 * Mark the SCB has having an outstanding 2316 * task management function. Should the command 2317 * complete normally before the task management 2318 * function can be sent, the host will be notified 2319 * to abort our requeued SCB. 2320 */ 2321 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2322 pending_scb->hscb->task_management); 2323 } else { 2324 /* 2325 * If non-packetized, set the MK_MESSAGE control 2326 * bit indicating that we desire to send a message. 2327 * We also set the disconnected flag since there is 2328 * no guarantee that our SCB control byte matches 2329 * the version on the card. We don't want the 2330 * sequencer to abort the command thinking an 2331 * unsolicited reselection occurred. 2332 */ 2333 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2334 2335 /* 2336 * The sequencer will never re-reference the 2337 * in-core SCB. To make sure we are notified 2338 * during reslection, set the MK_MESSAGE flag in 2339 * the card's copy of the SCB. 2340 */ 2341 ahd_outb(ahd, SCB_CONTROL, 2342 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2343 } 2344 2345 /* 2346 * Clear out any entries in the QINFIFO first 2347 * so we are the next SCB for this target 2348 * to run. 2349 */ 2350 ahd_search_qinfifo(ahd, cmd->device->id, 2351 cmd->device->channel + 'A', cmd->device->lun, 2352 SCB_LIST_NULL, ROLE_INITIATOR, 2353 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2354 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2355 ahd_set_scbptr(ahd, saved_scbptr); 2356 ahd_print_path(ahd, pending_scb); 2357 printf("Device is disconnected, re-queuing SCB\n"); 2358 wait = TRUE; 2359 } else { 2360 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2361 retval = FAILED; 2362 goto done; 2363 } 2364 2365 no_cmd: 2366 /* 2367 * Our assumption is that if we don't have the command, no 2368 * recovery action was required, so we return success. Again, 2369 * the semantics of the mid-layer recovery engine are not 2370 * well defined, so this may change in time. 2371 */ 2372 retval = SUCCESS; 2373 done: 2374 if (paused) 2375 ahd_unpause(ahd); 2376 if (wait) { 2377 DECLARE_COMPLETION_ONSTACK(done); 2378 2379 ahd->platform_data->eh_done = &done; 2380 ahd_unlock(ahd, &flags); 2381 2382 printf("%s: Recovery code sleeping\n", ahd_name(ahd)); 2383 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2384 ahd_lock(ahd, &flags); 2385 ahd->platform_data->eh_done = NULL; 2386 ahd_unlock(ahd, &flags); 2387 printf("%s: Timer Expired (active %d)\n", 2388 ahd_name(ahd), dev->active); 2389 retval = FAILED; 2390 } 2391 printf("Recovery code awake\n"); 2392 } else 2393 ahd_unlock(ahd, &flags); 2394 2395 if (retval != SUCCESS) 2396 printf("%s: Command abort returning 0x%x\n", 2397 ahd_name(ahd), retval); 2398 2399 return retval; 2400 } 2401 2402 static void ahd_linux_set_width(struct scsi_target *starget, int width) 2403 { 2404 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2405 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2406 struct ahd_devinfo devinfo; 2407 unsigned long flags; 2408 2409 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2410 starget->channel + 'A', ROLE_INITIATOR); 2411 ahd_lock(ahd, &flags); 2412 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2413 ahd_unlock(ahd, &flags); 2414 } 2415 2416 static void ahd_linux_set_period(struct scsi_target *starget, int period) 2417 { 2418 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2419 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2420 struct ahd_tmode_tstate *tstate; 2421 struct ahd_initiator_tinfo *tinfo 2422 = ahd_fetch_transinfo(ahd, 2423 starget->channel + 'A', 2424 shost->this_id, starget->id, &tstate); 2425 struct ahd_devinfo devinfo; 2426 unsigned int ppr_options = tinfo->goal.ppr_options; 2427 unsigned int dt; 2428 unsigned long flags; 2429 unsigned long offset = tinfo->goal.offset; 2430 2431 #ifdef AHD_DEBUG 2432 if ((ahd_debug & AHD_SHOW_DV) != 0) 2433 printf("%s: set period to %d\n", ahd_name(ahd), period); 2434 #endif 2435 if (offset == 0) 2436 offset = MAX_OFFSET; 2437 2438 if (period < 8) 2439 period = 8; 2440 if (period < 10) { 2441 if (spi_max_width(starget)) { 2442 ppr_options |= MSG_EXT_PPR_DT_REQ; 2443 if (period == 8) 2444 ppr_options |= MSG_EXT_PPR_IU_REQ; 2445 } else 2446 period = 10; 2447 } 2448 2449 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2450 2451 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2452 starget->channel + 'A', ROLE_INITIATOR); 2453 2454 /* all PPR requests apart from QAS require wide transfers */ 2455 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2456 if (spi_width(starget) == 0) 2457 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2458 } 2459 2460 ahd_find_syncrate(ahd, &period, &ppr_options, 2461 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2462 2463 ahd_lock(ahd, &flags); 2464 ahd_set_syncrate(ahd, &devinfo, period, offset, 2465 ppr_options, AHD_TRANS_GOAL, FALSE); 2466 ahd_unlock(ahd, &flags); 2467 } 2468 2469 static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2470 { 2471 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2472 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2473 struct ahd_tmode_tstate *tstate; 2474 struct ahd_initiator_tinfo *tinfo 2475 = ahd_fetch_transinfo(ahd, 2476 starget->channel + 'A', 2477 shost->this_id, starget->id, &tstate); 2478 struct ahd_devinfo devinfo; 2479 unsigned int ppr_options = 0; 2480 unsigned int period = 0; 2481 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2482 unsigned long flags; 2483 2484 #ifdef AHD_DEBUG 2485 if ((ahd_debug & AHD_SHOW_DV) != 0) 2486 printf("%s: set offset to %d\n", ahd_name(ahd), offset); 2487 #endif 2488 2489 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2490 starget->channel + 'A', ROLE_INITIATOR); 2491 if (offset != 0) { 2492 period = tinfo->goal.period; 2493 ppr_options = tinfo->goal.ppr_options; 2494 ahd_find_syncrate(ahd, &period, &ppr_options, 2495 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2496 } 2497 2498 ahd_lock(ahd, &flags); 2499 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2500 AHD_TRANS_GOAL, FALSE); 2501 ahd_unlock(ahd, &flags); 2502 } 2503 2504 static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2505 { 2506 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2507 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2508 struct ahd_tmode_tstate *tstate; 2509 struct ahd_initiator_tinfo *tinfo 2510 = ahd_fetch_transinfo(ahd, 2511 starget->channel + 'A', 2512 shost->this_id, starget->id, &tstate); 2513 struct ahd_devinfo devinfo; 2514 unsigned int ppr_options = tinfo->goal.ppr_options 2515 & ~MSG_EXT_PPR_DT_REQ; 2516 unsigned int period = tinfo->goal.period; 2517 unsigned int width = tinfo->goal.width; 2518 unsigned long flags; 2519 2520 #ifdef AHD_DEBUG 2521 if ((ahd_debug & AHD_SHOW_DV) != 0) 2522 printf("%s: %s DT\n", ahd_name(ahd), 2523 dt ? "enabling" : "disabling"); 2524 #endif 2525 if (dt && spi_max_width(starget)) { 2526 ppr_options |= MSG_EXT_PPR_DT_REQ; 2527 if (!width) 2528 ahd_linux_set_width(starget, 1); 2529 } else { 2530 if (period <= 9) 2531 period = 10; /* If resetting DT, period must be >= 25ns */ 2532 /* IU is invalid without DT set */ 2533 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2534 } 2535 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2536 starget->channel + 'A', ROLE_INITIATOR); 2537 ahd_find_syncrate(ahd, &period, &ppr_options, 2538 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2539 2540 ahd_lock(ahd, &flags); 2541 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2542 ppr_options, AHD_TRANS_GOAL, FALSE); 2543 ahd_unlock(ahd, &flags); 2544 } 2545 2546 static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2547 { 2548 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2549 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2550 struct ahd_tmode_tstate *tstate; 2551 struct ahd_initiator_tinfo *tinfo 2552 = ahd_fetch_transinfo(ahd, 2553 starget->channel + 'A', 2554 shost->this_id, starget->id, &tstate); 2555 struct ahd_devinfo devinfo; 2556 unsigned int ppr_options = tinfo->goal.ppr_options 2557 & ~MSG_EXT_PPR_QAS_REQ; 2558 unsigned int period = tinfo->goal.period; 2559 unsigned int dt; 2560 unsigned long flags; 2561 2562 #ifdef AHD_DEBUG 2563 if ((ahd_debug & AHD_SHOW_DV) != 0) 2564 printf("%s: %s QAS\n", ahd_name(ahd), 2565 qas ? "enabling" : "disabling"); 2566 #endif 2567 2568 if (qas) { 2569 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2570 } 2571 2572 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2573 2574 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2575 starget->channel + 'A', ROLE_INITIATOR); 2576 ahd_find_syncrate(ahd, &period, &ppr_options, 2577 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2578 2579 ahd_lock(ahd, &flags); 2580 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2581 ppr_options, AHD_TRANS_GOAL, FALSE); 2582 ahd_unlock(ahd, &flags); 2583 } 2584 2585 static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 2586 { 2587 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2588 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2589 struct ahd_tmode_tstate *tstate; 2590 struct ahd_initiator_tinfo *tinfo 2591 = ahd_fetch_transinfo(ahd, 2592 starget->channel + 'A', 2593 shost->this_id, starget->id, &tstate); 2594 struct ahd_devinfo devinfo; 2595 unsigned int ppr_options = tinfo->goal.ppr_options 2596 & ~MSG_EXT_PPR_IU_REQ; 2597 unsigned int period = tinfo->goal.period; 2598 unsigned int dt; 2599 unsigned long flags; 2600 2601 #ifdef AHD_DEBUG 2602 if ((ahd_debug & AHD_SHOW_DV) != 0) 2603 printf("%s: %s IU\n", ahd_name(ahd), 2604 iu ? "enabling" : "disabling"); 2605 #endif 2606 2607 if (iu && spi_max_width(starget)) { 2608 ppr_options |= MSG_EXT_PPR_IU_REQ; 2609 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2610 } 2611 2612 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 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_rd_strm(struct scsi_target *starget, int rdstrm) 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_RD_STRM; 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 printf("%s: %s Read Streaming\n", ahd_name(ahd), 2644 rdstrm ? "enabling" : "disabling"); 2645 #endif 2646 2647 if (rdstrm && spi_max_width(starget)) 2648 ppr_options |= MSG_EXT_PPR_RD_STRM; 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_wr_flow(struct scsi_target *starget, int wrflow) 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_WR_FLOW; 2673 unsigned int period = tinfo->goal.period; 2674 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2675 unsigned long flags; 2676 2677 #ifdef AHD_DEBUG 2678 if ((ahd_debug & AHD_SHOW_DV) != 0) 2679 printf("%s: %s Write Flow Control\n", ahd_name(ahd), 2680 wrflow ? "enabling" : "disabling"); 2681 #endif 2682 2683 if (wrflow && spi_max_width(starget)) 2684 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2685 2686 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2687 starget->channel + 'A', ROLE_INITIATOR); 2688 ahd_find_syncrate(ahd, &period, &ppr_options, 2689 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2690 2691 ahd_lock(ahd, &flags); 2692 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2693 ppr_options, AHD_TRANS_GOAL, FALSE); 2694 ahd_unlock(ahd, &flags); 2695 } 2696 2697 static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2698 { 2699 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2700 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2701 struct ahd_tmode_tstate *tstate; 2702 struct ahd_initiator_tinfo *tinfo 2703 = ahd_fetch_transinfo(ahd, 2704 starget->channel + 'A', 2705 shost->this_id, starget->id, &tstate); 2706 struct ahd_devinfo devinfo; 2707 unsigned int ppr_options = tinfo->goal.ppr_options 2708 & ~MSG_EXT_PPR_RTI; 2709 unsigned int period = tinfo->goal.period; 2710 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2711 unsigned long flags; 2712 2713 if ((ahd->features & AHD_RTI) == 0) { 2714 #ifdef AHD_DEBUG 2715 if ((ahd_debug & AHD_SHOW_DV) != 0) 2716 printf("%s: RTI not available\n", ahd_name(ahd)); 2717 #endif 2718 return; 2719 } 2720 2721 #ifdef AHD_DEBUG 2722 if ((ahd_debug & AHD_SHOW_DV) != 0) 2723 printf("%s: %s RTI\n", ahd_name(ahd), 2724 rti ? "enabling" : "disabling"); 2725 #endif 2726 2727 if (rti && spi_max_width(starget)) 2728 ppr_options |= MSG_EXT_PPR_RTI; 2729 2730 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2731 starget->channel + 'A', ROLE_INITIATOR); 2732 ahd_find_syncrate(ahd, &period, &ppr_options, 2733 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2734 2735 ahd_lock(ahd, &flags); 2736 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2737 ppr_options, AHD_TRANS_GOAL, FALSE); 2738 ahd_unlock(ahd, &flags); 2739 } 2740 2741 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2742 { 2743 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2744 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2745 struct ahd_tmode_tstate *tstate; 2746 struct ahd_initiator_tinfo *tinfo 2747 = ahd_fetch_transinfo(ahd, 2748 starget->channel + 'A', 2749 shost->this_id, starget->id, &tstate); 2750 struct ahd_devinfo devinfo; 2751 unsigned int ppr_options = tinfo->goal.ppr_options 2752 & ~MSG_EXT_PPR_PCOMP_EN; 2753 unsigned int period = tinfo->goal.period; 2754 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2755 unsigned long flags; 2756 2757 #ifdef AHD_DEBUG 2758 if ((ahd_debug & AHD_SHOW_DV) != 0) 2759 printf("%s: %s Precompensation\n", ahd_name(ahd), 2760 pcomp ? "Enable" : "Disable"); 2761 #endif 2762 2763 if (pcomp && spi_max_width(starget)) { 2764 uint8_t precomp; 2765 2766 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 2767 const struct ahd_linux_iocell_opts *iocell_opts; 2768 2769 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2770 precomp = iocell_opts->precomp; 2771 } else { 2772 precomp = AIC79XX_DEFAULT_PRECOMP; 2773 } 2774 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2775 AHD_SET_PRECOMP(ahd, precomp); 2776 } else { 2777 AHD_SET_PRECOMP(ahd, 0); 2778 } 2779 2780 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2781 starget->channel + 'A', ROLE_INITIATOR); 2782 ahd_find_syncrate(ahd, &period, &ppr_options, 2783 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2784 2785 ahd_lock(ahd, &flags); 2786 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2787 ppr_options, AHD_TRANS_GOAL, FALSE); 2788 ahd_unlock(ahd, &flags); 2789 } 2790 2791 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2792 { 2793 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2794 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2795 struct ahd_tmode_tstate *tstate; 2796 struct ahd_initiator_tinfo *tinfo 2797 = ahd_fetch_transinfo(ahd, 2798 starget->channel + 'A', 2799 shost->this_id, starget->id, &tstate); 2800 struct ahd_devinfo devinfo; 2801 unsigned int ppr_options = tinfo->goal.ppr_options 2802 & ~MSG_EXT_PPR_HOLD_MCS; 2803 unsigned int period = tinfo->goal.period; 2804 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2805 unsigned long flags; 2806 2807 if (hold && spi_max_width(starget)) 2808 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2809 2810 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2811 starget->channel + 'A', ROLE_INITIATOR); 2812 ahd_find_syncrate(ahd, &period, &ppr_options, 2813 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2814 2815 ahd_lock(ahd, &flags); 2816 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2817 ppr_options, AHD_TRANS_GOAL, FALSE); 2818 ahd_unlock(ahd, &flags); 2819 } 2820 2821 static void ahd_linux_get_signalling(struct Scsi_Host *shost) 2822 { 2823 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; 2824 unsigned long flags; 2825 u8 mode; 2826 2827 ahd_lock(ahd, &flags); 2828 ahd_pause(ahd); 2829 mode = ahd_inb(ahd, SBLKCTL); 2830 ahd_unpause(ahd); 2831 ahd_unlock(ahd, &flags); 2832 2833 if (mode & ENAB40) 2834 spi_signalling(shost) = SPI_SIGNAL_LVD; 2835 else if (mode & ENAB20) 2836 spi_signalling(shost) = SPI_SIGNAL_SE; 2837 else 2838 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2839 } 2840 2841 static struct spi_function_template ahd_linux_transport_functions = { 2842 .set_offset = ahd_linux_set_offset, 2843 .show_offset = 1, 2844 .set_period = ahd_linux_set_period, 2845 .show_period = 1, 2846 .set_width = ahd_linux_set_width, 2847 .show_width = 1, 2848 .set_dt = ahd_linux_set_dt, 2849 .show_dt = 1, 2850 .set_iu = ahd_linux_set_iu, 2851 .show_iu = 1, 2852 .set_qas = ahd_linux_set_qas, 2853 .show_qas = 1, 2854 .set_rd_strm = ahd_linux_set_rd_strm, 2855 .show_rd_strm = 1, 2856 .set_wr_flow = ahd_linux_set_wr_flow, 2857 .show_wr_flow = 1, 2858 .set_rti = ahd_linux_set_rti, 2859 .show_rti = 1, 2860 .set_pcomp_en = ahd_linux_set_pcomp_en, 2861 .show_pcomp_en = 1, 2862 .set_hold_mcs = ahd_linux_set_hold_mcs, 2863 .show_hold_mcs = 1, 2864 .get_signalling = ahd_linux_get_signalling, 2865 }; 2866 2867 static int __init 2868 ahd_linux_init(void) 2869 { 2870 int error = 0; 2871 2872 /* 2873 * If we've been passed any parameters, process them now. 2874 */ 2875 if (aic79xx) 2876 aic79xx_setup(aic79xx); 2877 2878 ahd_linux_transport_template = 2879 spi_attach_transport(&ahd_linux_transport_functions); 2880 if (!ahd_linux_transport_template) 2881 return -ENODEV; 2882 2883 scsi_transport_reserve_device(ahd_linux_transport_template, 2884 sizeof(struct ahd_linux_device)); 2885 2886 error = ahd_linux_pci_init(); 2887 if (error) 2888 spi_release_transport(ahd_linux_transport_template); 2889 return error; 2890 } 2891 2892 static void __exit 2893 ahd_linux_exit(void) 2894 { 2895 ahd_linux_pci_exit(); 2896 spi_release_transport(ahd_linux_transport_template); 2897 } 2898 2899 module_init(ahd_linux_init); 2900 module_exit(ahd_linux_exit); 2901