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 /* Do not negotiate packetized transfers */ 631 spi_rd_strm(starget) = 0; 632 spi_pcomp_en(starget) = 0; 633 spi_rti(starget) = 0; 634 spi_wr_flow(starget) = 0; 635 spi_hold_mcs(starget) = 0; 636 } else { 637 if ((ahd->features & AHD_RTI) == 0) 638 spi_rti(starget) = 0; 639 } 640 641 if ((flags & CFQAS) == 0) 642 spi_qas(starget) = 0; 643 644 /* Transinfo values have been set to BIOS settings */ 645 spi_max_width(starget) = (flags & CFWIDEB) ? 1 : 0; 646 spi_min_period(starget) = tinfo->user.period; 647 spi_max_offset(starget) = tinfo->user.offset; 648 } 649 650 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 651 starget->id, &tstate); 652 ahd_compile_devinfo(&devinfo, ahd->our_id, starget->id, 653 CAM_LUN_WILDCARD, channel, 654 ROLE_INITIATOR); 655 ahd_set_syncrate(ahd, &devinfo, 0, 0, 0, 656 AHD_TRANS_GOAL, /*paused*/FALSE); 657 ahd_set_width(ahd, &devinfo, MSG_EXT_WDTR_BUS_8_BIT, 658 AHD_TRANS_GOAL, /*paused*/FALSE); 659 ahd_unlock(ahd, &flags); 660 661 return 0; 662 } 663 664 static void 665 ahd_linux_target_destroy(struct scsi_target *starget) 666 { 667 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 668 669 *ahd_targp = NULL; 670 } 671 672 static int 673 ahd_linux_slave_alloc(struct scsi_device *sdev) 674 { 675 struct ahd_softc *ahd = 676 *((struct ahd_softc **)sdev->host->hostdata); 677 struct ahd_linux_device *dev; 678 679 if (bootverbose) 680 printf("%s: Slave Alloc %d\n", ahd_name(ahd), sdev->id); 681 682 dev = scsi_transport_device_data(sdev); 683 memset(dev, 0, sizeof(*dev)); 684 685 /* 686 * We start out life using untagged 687 * transactions of which we allow one. 688 */ 689 dev->openings = 1; 690 691 /* 692 * Set maxtags to 0. This will be changed if we 693 * later determine that we are dealing with 694 * a tagged queuing capable device. 695 */ 696 dev->maxtags = 0; 697 698 return (0); 699 } 700 701 static int 702 ahd_linux_slave_configure(struct scsi_device *sdev) 703 { 704 struct ahd_softc *ahd; 705 706 ahd = *((struct ahd_softc **)sdev->host->hostdata); 707 if (bootverbose) 708 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 709 710 ahd_linux_device_queue_depth(sdev); 711 712 /* Initial Domain Validation */ 713 if (!spi_initial_dv(sdev->sdev_target)) 714 spi_dv_device(sdev); 715 716 return 0; 717 } 718 719 #if defined(__i386__) 720 /* 721 * Return the disk geometry for the given SCSI device. 722 */ 723 static int 724 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 725 sector_t capacity, int geom[]) 726 { 727 uint8_t *bh; 728 int heads; 729 int sectors; 730 int cylinders; 731 int ret; 732 int extended; 733 struct ahd_softc *ahd; 734 735 ahd = *((struct ahd_softc **)sdev->host->hostdata); 736 737 bh = scsi_bios_ptable(bdev); 738 if (bh) { 739 ret = scsi_partsize(bh, capacity, 740 &geom[2], &geom[0], &geom[1]); 741 kfree(bh); 742 if (ret != -1) 743 return (ret); 744 } 745 heads = 64; 746 sectors = 32; 747 cylinders = aic_sector_div(capacity, heads, sectors); 748 749 if (aic79xx_extended != 0) 750 extended = 1; 751 else 752 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 753 if (extended && cylinders >= 1024) { 754 heads = 255; 755 sectors = 63; 756 cylinders = aic_sector_div(capacity, heads, sectors); 757 } 758 geom[0] = heads; 759 geom[1] = sectors; 760 geom[2] = cylinders; 761 return (0); 762 } 763 #endif 764 765 /* 766 * Abort the current SCSI command(s). 767 */ 768 static int 769 ahd_linux_abort(struct scsi_cmnd *cmd) 770 { 771 int error; 772 773 error = ahd_linux_queue_abort_cmd(cmd); 774 775 return error; 776 } 777 778 /* 779 * Attempt to send a target reset message to the device that timed out. 780 */ 781 static int 782 ahd_linux_dev_reset(struct scsi_cmnd *cmd) 783 { 784 struct ahd_softc *ahd; 785 struct ahd_linux_device *dev; 786 struct scb *reset_scb; 787 u_int cdb_byte; 788 int retval = SUCCESS; 789 int paused; 790 int wait; 791 struct ahd_initiator_tinfo *tinfo; 792 struct ahd_tmode_tstate *tstate; 793 unsigned long flags; 794 DECLARE_COMPLETION_ONSTACK(done); 795 796 reset_scb = NULL; 797 paused = FALSE; 798 wait = FALSE; 799 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 800 801 scmd_printk(KERN_INFO, cmd, 802 "Attempting to queue a TARGET RESET message:"); 803 804 printf("CDB:"); 805 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 806 printf(" 0x%x", cmd->cmnd[cdb_byte]); 807 printf("\n"); 808 809 /* 810 * Determine if we currently own this command. 811 */ 812 dev = scsi_transport_device_data(cmd->device); 813 814 if (dev == NULL) { 815 /* 816 * No target device for this command exists, 817 * so we must not still own the command. 818 */ 819 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 820 return SUCCESS; 821 } 822 823 /* 824 * Generate us a new SCB 825 */ 826 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); 827 if (!reset_scb) { 828 scmd_printk(KERN_INFO, cmd, "No SCB available\n"); 829 return FAILED; 830 } 831 832 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 833 cmd->device->id, &tstate); 834 reset_scb->io_ctx = cmd; 835 reset_scb->platform_data->dev = dev; 836 reset_scb->sg_count = 0; 837 ahd_set_residual(reset_scb, 0); 838 ahd_set_sense_residual(reset_scb, 0); 839 reset_scb->platform_data->xfer_len = 0; 840 reset_scb->hscb->control = 0; 841 reset_scb->hscb->scsiid = BUILD_SCSIID(ahd,cmd); 842 reset_scb->hscb->lun = cmd->device->lun; 843 reset_scb->hscb->cdb_len = 0; 844 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; 845 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; 846 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 847 reset_scb->flags |= SCB_PACKETIZED; 848 } else { 849 reset_scb->hscb->control |= MK_MESSAGE; 850 } 851 dev->openings--; 852 dev->active++; 853 dev->commands_issued++; 854 855 ahd_lock(ahd, &flags); 856 857 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); 858 ahd_queue_scb(ahd, reset_scb); 859 860 ahd->platform_data->eh_done = &done; 861 ahd_unlock(ahd, &flags); 862 863 printf("%s: Device reset code sleeping\n", ahd_name(ahd)); 864 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 865 ahd_lock(ahd, &flags); 866 ahd->platform_data->eh_done = NULL; 867 ahd_unlock(ahd, &flags); 868 printf("%s: Device reset timer expired (active %d)\n", 869 ahd_name(ahd), dev->active); 870 retval = FAILED; 871 } 872 printf("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); 873 874 return (retval); 875 } 876 877 /* 878 * Reset the SCSI bus. 879 */ 880 static int 881 ahd_linux_bus_reset(struct scsi_cmnd *cmd) 882 { 883 struct ahd_softc *ahd; 884 int found; 885 unsigned long flags; 886 887 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 888 #ifdef AHD_DEBUG 889 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 890 printf("%s: Bus reset called for cmd %p\n", 891 ahd_name(ahd), cmd); 892 #endif 893 ahd_lock(ahd, &flags); 894 895 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 896 /*initiate reset*/TRUE); 897 ahd_unlock(ahd, &flags); 898 899 if (bootverbose) 900 printf("%s: SCSI bus reset delivered. " 901 "%d SCBs aborted.\n", ahd_name(ahd), found); 902 903 return (SUCCESS); 904 } 905 906 struct scsi_host_template aic79xx_driver_template = { 907 .module = THIS_MODULE, 908 .name = "aic79xx", 909 .proc_name = "aic79xx", 910 .proc_info = ahd_linux_proc_info, 911 .info = ahd_linux_info, 912 .queuecommand = ahd_linux_queue, 913 .eh_abort_handler = ahd_linux_abort, 914 .eh_device_reset_handler = ahd_linux_dev_reset, 915 .eh_bus_reset_handler = ahd_linux_bus_reset, 916 #if defined(__i386__) 917 .bios_param = ahd_linux_biosparam, 918 #endif 919 .can_queue = AHD_MAX_QUEUE, 920 .this_id = -1, 921 .max_sectors = 8192, 922 .cmd_per_lun = 2, 923 .use_clustering = ENABLE_CLUSTERING, 924 .slave_alloc = ahd_linux_slave_alloc, 925 .slave_configure = ahd_linux_slave_configure, 926 .target_alloc = ahd_linux_target_alloc, 927 .target_destroy = ahd_linux_target_destroy, 928 }; 929 930 /******************************** Bus DMA *************************************/ 931 int 932 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 933 bus_size_t alignment, bus_size_t boundary, 934 dma_addr_t lowaddr, dma_addr_t highaddr, 935 bus_dma_filter_t *filter, void *filterarg, 936 bus_size_t maxsize, int nsegments, 937 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 938 { 939 bus_dma_tag_t dmat; 940 941 dmat = malloc(sizeof(*dmat), M_DEVBUF, M_NOWAIT); 942 if (dmat == NULL) 943 return (ENOMEM); 944 945 /* 946 * Linux is very simplistic about DMA memory. For now don't 947 * maintain all specification information. Once Linux supplies 948 * better facilities for doing these operations, or the 949 * needs of this particular driver change, we might need to do 950 * more here. 951 */ 952 dmat->alignment = alignment; 953 dmat->boundary = boundary; 954 dmat->maxsize = maxsize; 955 *ret_tag = dmat; 956 return (0); 957 } 958 959 void 960 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 961 { 962 free(dmat, M_DEVBUF); 963 } 964 965 int 966 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 967 int flags, bus_dmamap_t *mapp) 968 { 969 *vaddr = pci_alloc_consistent(ahd->dev_softc, 970 dmat->maxsize, mapp); 971 if (*vaddr == NULL) 972 return (ENOMEM); 973 return(0); 974 } 975 976 void 977 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 978 void* vaddr, bus_dmamap_t map) 979 { 980 pci_free_consistent(ahd->dev_softc, dmat->maxsize, 981 vaddr, map); 982 } 983 984 int 985 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 986 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 987 void *cb_arg, int flags) 988 { 989 /* 990 * Assume for now that this will only be used during 991 * initialization and not for per-transaction buffer mapping. 992 */ 993 bus_dma_segment_t stack_sg; 994 995 stack_sg.ds_addr = map; 996 stack_sg.ds_len = dmat->maxsize; 997 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 998 return (0); 999 } 1000 1001 void 1002 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 1003 { 1004 } 1005 1006 int 1007 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 1008 { 1009 /* Nothing to do */ 1010 return (0); 1011 } 1012 1013 /********************* Platform Dependent Functions ***************************/ 1014 static void 1015 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 1016 { 1017 1018 if ((instance >= 0) 1019 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { 1020 uint8_t *iocell_info; 1021 1022 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 1023 iocell_info[index] = value & 0xFFFF; 1024 if (bootverbose) 1025 printf("iocell[%d:%ld] = %d\n", instance, index, value); 1026 } 1027 } 1028 1029 static void 1030 ahd_linux_setup_tag_info_global(char *p) 1031 { 1032 int tags, i, j; 1033 1034 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 1035 printf("Setting Global Tags= %d\n", tags); 1036 1037 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { 1038 for (j = 0; j < AHD_NUM_TARGETS; j++) { 1039 aic79xx_tag_info[i].tag_commands[j] = tags; 1040 } 1041 } 1042 } 1043 1044 static void 1045 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 1046 { 1047 1048 if ((instance >= 0) && (targ >= 0) 1049 && (instance < ARRAY_SIZE(aic79xx_tag_info)) 1050 && (targ < AHD_NUM_TARGETS)) { 1051 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 1052 if (bootverbose) 1053 printf("tag_info[%d:%d] = %d\n", instance, targ, value); 1054 } 1055 } 1056 1057 static char * 1058 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 1059 void (*callback)(u_long, int, int, int32_t), 1060 u_long callback_arg) 1061 { 1062 char *tok_end; 1063 char *tok_end2; 1064 int i; 1065 int instance; 1066 int targ; 1067 int done; 1068 char tok_list[] = {'.', ',', '{', '}', '\0'}; 1069 1070 /* All options use a ':' name/arg separator */ 1071 if (*opt_arg != ':') 1072 return (opt_arg); 1073 opt_arg++; 1074 instance = -1; 1075 targ = -1; 1076 done = FALSE; 1077 /* 1078 * Restore separator that may be in 1079 * the middle of our option argument. 1080 */ 1081 tok_end = strchr(opt_arg, '\0'); 1082 if (tok_end < end) 1083 *tok_end = ','; 1084 while (!done) { 1085 switch (*opt_arg) { 1086 case '{': 1087 if (instance == -1) { 1088 instance = 0; 1089 } else { 1090 if (depth > 1) { 1091 if (targ == -1) 1092 targ = 0; 1093 } else { 1094 printf("Malformed Option %s\n", 1095 opt_name); 1096 done = TRUE; 1097 } 1098 } 1099 opt_arg++; 1100 break; 1101 case '}': 1102 if (targ != -1) 1103 targ = -1; 1104 else if (instance != -1) 1105 instance = -1; 1106 opt_arg++; 1107 break; 1108 case ',': 1109 case '.': 1110 if (instance == -1) 1111 done = TRUE; 1112 else if (targ >= 0) 1113 targ++; 1114 else if (instance >= 0) 1115 instance++; 1116 opt_arg++; 1117 break; 1118 case '\0': 1119 done = TRUE; 1120 break; 1121 default: 1122 tok_end = end; 1123 for (i = 0; tok_list[i]; i++) { 1124 tok_end2 = strchr(opt_arg, tok_list[i]); 1125 if ((tok_end2) && (tok_end2 < tok_end)) 1126 tok_end = tok_end2; 1127 } 1128 callback(callback_arg, instance, targ, 1129 simple_strtol(opt_arg, NULL, 0)); 1130 opt_arg = tok_end; 1131 break; 1132 } 1133 } 1134 return (opt_arg); 1135 } 1136 1137 /* 1138 * Handle Linux boot parameters. This routine allows for assigning a value 1139 * to a parameter with a ':' between the parameter and the value. 1140 * ie. aic79xx=stpwlev:1,extended 1141 */ 1142 static int 1143 aic79xx_setup(char *s) 1144 { 1145 int i, n; 1146 char *p; 1147 char *end; 1148 1149 static const struct { 1150 const char *name; 1151 uint32_t *flag; 1152 } options[] = { 1153 { "extended", &aic79xx_extended }, 1154 { "no_reset", &aic79xx_no_reset }, 1155 { "verbose", &aic79xx_verbose }, 1156 { "allow_memio", &aic79xx_allow_memio}, 1157 #ifdef AHD_DEBUG 1158 { "debug", &ahd_debug }, 1159 #endif 1160 { "periodic_otag", &aic79xx_periodic_otag }, 1161 { "pci_parity", &aic79xx_pci_parity }, 1162 { "seltime", &aic79xx_seltime }, 1163 { "tag_info", NULL }, 1164 { "global_tag_depth", NULL}, 1165 { "slewrate", NULL }, 1166 { "precomp", NULL }, 1167 { "amplitude", NULL }, 1168 { "slowcrc", &aic79xx_slowcrc }, 1169 }; 1170 1171 end = strchr(s, '\0'); 1172 1173 /* 1174 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1175 * will never be 0 in this case. 1176 */ 1177 n = 0; 1178 1179 while ((p = strsep(&s, ",.")) != NULL) { 1180 if (*p == '\0') 1181 continue; 1182 for (i = 0; i < ARRAY_SIZE(options); i++) { 1183 1184 n = strlen(options[i].name); 1185 if (strncmp(options[i].name, p, n) == 0) 1186 break; 1187 } 1188 if (i == ARRAY_SIZE(options)) 1189 continue; 1190 1191 if (strncmp(p, "global_tag_depth", n) == 0) { 1192 ahd_linux_setup_tag_info_global(p + n); 1193 } else if (strncmp(p, "tag_info", n) == 0) { 1194 s = ahd_parse_brace_option("tag_info", p + n, end, 1195 2, ahd_linux_setup_tag_info, 0); 1196 } else if (strncmp(p, "slewrate", n) == 0) { 1197 s = ahd_parse_brace_option("slewrate", 1198 p + n, end, 1, ahd_linux_setup_iocell_info, 1199 AIC79XX_SLEWRATE_INDEX); 1200 } else if (strncmp(p, "precomp", n) == 0) { 1201 s = ahd_parse_brace_option("precomp", 1202 p + n, end, 1, ahd_linux_setup_iocell_info, 1203 AIC79XX_PRECOMP_INDEX); 1204 } else if (strncmp(p, "amplitude", n) == 0) { 1205 s = ahd_parse_brace_option("amplitude", 1206 p + n, end, 1, ahd_linux_setup_iocell_info, 1207 AIC79XX_AMPLITUDE_INDEX); 1208 } else if (p[n] == ':') { 1209 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1210 } else if (!strncmp(p, "verbose", n)) { 1211 *(options[i].flag) = 1; 1212 } else { 1213 *(options[i].flag) ^= 0xFFFFFFFF; 1214 } 1215 } 1216 return 1; 1217 } 1218 1219 __setup("aic79xx=", aic79xx_setup); 1220 1221 uint32_t aic79xx_verbose; 1222 1223 int 1224 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1225 { 1226 char buf[80]; 1227 struct Scsi_Host *host; 1228 char *new_name; 1229 u_long s; 1230 int retval; 1231 1232 template->name = ahd->description; 1233 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1234 if (host == NULL) 1235 return (ENOMEM); 1236 1237 *((struct ahd_softc **)host->hostdata) = ahd; 1238 ahd->platform_data->host = host; 1239 host->can_queue = AHD_MAX_QUEUE; 1240 host->cmd_per_lun = 2; 1241 host->sg_tablesize = AHD_NSEG; 1242 host->this_id = ahd->our_id; 1243 host->irq = ahd->platform_data->irq; 1244 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1245 host->max_lun = AHD_NUM_LUNS; 1246 host->max_channel = 0; 1247 host->sg_tablesize = AHD_NSEG; 1248 ahd_lock(ahd, &s); 1249 ahd_set_unit(ahd, ahd_linux_unit++); 1250 ahd_unlock(ahd, &s); 1251 sprintf(buf, "scsi%d", host->host_no); 1252 new_name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT); 1253 if (new_name != NULL) { 1254 strcpy(new_name, buf); 1255 ahd_set_name(ahd, new_name); 1256 } 1257 host->unique_id = ahd->unit; 1258 ahd_linux_initialize_scsi_bus(ahd); 1259 ahd_intr_enable(ahd, TRUE); 1260 1261 host->transportt = ahd_linux_transport_template; 1262 1263 retval = scsi_add_host(host, &ahd->dev_softc->dev); 1264 if (retval) { 1265 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); 1266 scsi_host_put(host); 1267 return retval; 1268 } 1269 1270 scsi_scan_host(host); 1271 return 0; 1272 } 1273 1274 /* 1275 * Place the SCSI bus into a known state by either resetting it, 1276 * or forcing transfer negotiations on the next command to any 1277 * target. 1278 */ 1279 static void 1280 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1281 { 1282 u_int target_id; 1283 u_int numtarg; 1284 unsigned long s; 1285 1286 target_id = 0; 1287 numtarg = 0; 1288 1289 if (aic79xx_no_reset != 0) 1290 ahd->flags &= ~AHD_RESET_BUS_A; 1291 1292 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1293 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1294 else 1295 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1296 1297 ahd_lock(ahd, &s); 1298 1299 /* 1300 * Force negotiation to async for all targets that 1301 * will not see an initial bus reset. 1302 */ 1303 for (; target_id < numtarg; target_id++) { 1304 struct ahd_devinfo devinfo; 1305 struct ahd_initiator_tinfo *tinfo; 1306 struct ahd_tmode_tstate *tstate; 1307 1308 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1309 target_id, &tstate); 1310 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1311 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1312 ahd_update_neg_request(ahd, &devinfo, tstate, 1313 tinfo, AHD_NEG_ALWAYS); 1314 } 1315 ahd_unlock(ahd, &s); 1316 /* Give the bus some time to recover */ 1317 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1318 ahd_freeze_simq(ahd); 1319 msleep(AIC79XX_RESET_DELAY); 1320 ahd_release_simq(ahd); 1321 } 1322 } 1323 1324 int 1325 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1326 { 1327 ahd->platform_data = 1328 malloc(sizeof(struct ahd_platform_data), M_DEVBUF, M_NOWAIT); 1329 if (ahd->platform_data == NULL) 1330 return (ENOMEM); 1331 memset(ahd->platform_data, 0, sizeof(struct ahd_platform_data)); 1332 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1333 ahd_lockinit(ahd); 1334 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1335 return (0); 1336 } 1337 1338 void 1339 ahd_platform_free(struct ahd_softc *ahd) 1340 { 1341 struct scsi_target *starget; 1342 int i; 1343 1344 if (ahd->platform_data != NULL) { 1345 /* destroy all of the device and target objects */ 1346 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1347 starget = ahd->platform_data->starget[i]; 1348 if (starget != NULL) { 1349 ahd->platform_data->starget[i] = NULL; 1350 } 1351 } 1352 1353 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1354 free_irq(ahd->platform_data->irq, ahd); 1355 if (ahd->tags[0] == BUS_SPACE_PIO 1356 && ahd->bshs[0].ioport != 0) 1357 release_region(ahd->bshs[0].ioport, 256); 1358 if (ahd->tags[1] == BUS_SPACE_PIO 1359 && ahd->bshs[1].ioport != 0) 1360 release_region(ahd->bshs[1].ioport, 256); 1361 if (ahd->tags[0] == BUS_SPACE_MEMIO 1362 && ahd->bshs[0].maddr != NULL) { 1363 iounmap(ahd->bshs[0].maddr); 1364 release_mem_region(ahd->platform_data->mem_busaddr, 1365 0x1000); 1366 } 1367 if (ahd->platform_data->host) 1368 scsi_host_put(ahd->platform_data->host); 1369 1370 free(ahd->platform_data, M_DEVBUF); 1371 } 1372 } 1373 1374 void 1375 ahd_platform_init(struct ahd_softc *ahd) 1376 { 1377 /* 1378 * Lookup and commit any modified IO Cell options. 1379 */ 1380 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 1381 const struct ahd_linux_iocell_opts *iocell_opts; 1382 1383 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1384 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1385 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1386 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1387 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1388 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1389 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1390 } 1391 1392 } 1393 1394 void 1395 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1396 { 1397 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1398 SCB_GET_CHANNEL(ahd, scb), 1399 SCB_GET_LUN(scb), SCB_LIST_NULL, 1400 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1401 } 1402 1403 void 1404 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev, 1405 struct ahd_devinfo *devinfo, ahd_queue_alg alg) 1406 { 1407 struct ahd_linux_device *dev; 1408 int was_queuing; 1409 int now_queuing; 1410 1411 if (sdev == NULL) 1412 return; 1413 1414 dev = scsi_transport_device_data(sdev); 1415 1416 if (dev == NULL) 1417 return; 1418 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1419 switch (alg) { 1420 default: 1421 case AHD_QUEUE_NONE: 1422 now_queuing = 0; 1423 break; 1424 case AHD_QUEUE_BASIC: 1425 now_queuing = AHD_DEV_Q_BASIC; 1426 break; 1427 case AHD_QUEUE_TAGGED: 1428 now_queuing = AHD_DEV_Q_TAGGED; 1429 break; 1430 } 1431 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1432 && (was_queuing != now_queuing) 1433 && (dev->active != 0)) { 1434 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1435 dev->qfrozen++; 1436 } 1437 1438 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1439 if (now_queuing) { 1440 u_int usertags; 1441 1442 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1443 if (!was_queuing) { 1444 /* 1445 * Start out agressively and allow our 1446 * dynamic queue depth algorithm to take 1447 * care of the rest. 1448 */ 1449 dev->maxtags = usertags; 1450 dev->openings = dev->maxtags - dev->active; 1451 } 1452 if (dev->maxtags == 0) { 1453 /* 1454 * Queueing is disabled by the user. 1455 */ 1456 dev->openings = 1; 1457 } else if (alg == AHD_QUEUE_TAGGED) { 1458 dev->flags |= AHD_DEV_Q_TAGGED; 1459 if (aic79xx_periodic_otag != 0) 1460 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1461 } else 1462 dev->flags |= AHD_DEV_Q_BASIC; 1463 } else { 1464 /* We can only have one opening. */ 1465 dev->maxtags = 0; 1466 dev->openings = 1 - dev->active; 1467 } 1468 1469 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1470 case AHD_DEV_Q_BASIC: 1471 scsi_set_tag_type(sdev, MSG_SIMPLE_TASK); 1472 scsi_activate_tcq(sdev, dev->openings + dev->active); 1473 break; 1474 case AHD_DEV_Q_TAGGED: 1475 scsi_set_tag_type(sdev, MSG_ORDERED_TASK); 1476 scsi_activate_tcq(sdev, dev->openings + dev->active); 1477 break; 1478 default: 1479 /* 1480 * We allow the OS to queue 2 untagged transactions to 1481 * us at any time even though we can only execute them 1482 * serially on the controller/device. This should 1483 * remove some latency. 1484 */ 1485 scsi_deactivate_tcq(sdev, 1); 1486 break; 1487 } 1488 } 1489 1490 int 1491 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1492 int lun, u_int tag, role_t role, uint32_t status) 1493 { 1494 return 0; 1495 } 1496 1497 static u_int 1498 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1499 { 1500 static int warned_user; 1501 u_int tags; 1502 1503 tags = 0; 1504 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1505 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { 1506 1507 if (warned_user == 0) { 1508 printf(KERN_WARNING 1509 "aic79xx: WARNING: Insufficient tag_info instances\n" 1510 "aic79xx: for installed controllers. Using defaults\n" 1511 "aic79xx: Please update the aic79xx_tag_info array in\n" 1512 "aic79xx: the aic79xx_osm.c source file.\n"); 1513 warned_user++; 1514 } 1515 tags = AHD_MAX_QUEUE; 1516 } else { 1517 adapter_tag_info_t *tag_info; 1518 1519 tag_info = &aic79xx_tag_info[ahd->unit]; 1520 tags = tag_info->tag_commands[devinfo->target_offset]; 1521 if (tags > AHD_MAX_QUEUE) 1522 tags = AHD_MAX_QUEUE; 1523 } 1524 } 1525 return (tags); 1526 } 1527 1528 /* 1529 * Determines the queue depth for a given device. 1530 */ 1531 static void 1532 ahd_linux_device_queue_depth(struct scsi_device *sdev) 1533 { 1534 struct ahd_devinfo devinfo; 1535 u_int tags; 1536 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1537 1538 ahd_compile_devinfo(&devinfo, 1539 ahd->our_id, 1540 sdev->sdev_target->id, sdev->lun, 1541 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1542 ROLE_INITIATOR); 1543 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1544 if (tags != 0 && sdev->tagged_supported != 0) { 1545 1546 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); 1547 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1548 devinfo.lun, AC_TRANSFER_NEG); 1549 ahd_print_devinfo(ahd, &devinfo); 1550 printf("Tagged Queuing enabled. Depth %d\n", tags); 1551 } else { 1552 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); 1553 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1554 devinfo.lun, AC_TRANSFER_NEG); 1555 } 1556 } 1557 1558 static int 1559 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1560 struct scsi_cmnd *cmd) 1561 { 1562 struct scb *scb; 1563 struct hardware_scb *hscb; 1564 struct ahd_initiator_tinfo *tinfo; 1565 struct ahd_tmode_tstate *tstate; 1566 u_int col_idx; 1567 uint16_t mask; 1568 unsigned long flags; 1569 int nseg; 1570 1571 nseg = scsi_dma_map(cmd); 1572 if (nseg < 0) 1573 return SCSI_MLQUEUE_HOST_BUSY; 1574 1575 ahd_lock(ahd, &flags); 1576 1577 /* 1578 * Get an scb to use. 1579 */ 1580 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1581 cmd->device->id, &tstate); 1582 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1583 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1584 col_idx = AHD_NEVER_COL_IDX; 1585 } else { 1586 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1587 cmd->device->lun); 1588 } 1589 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1590 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1591 ahd_unlock(ahd, &flags); 1592 scsi_dma_unmap(cmd); 1593 return SCSI_MLQUEUE_HOST_BUSY; 1594 } 1595 1596 scb->io_ctx = cmd; 1597 scb->platform_data->dev = dev; 1598 hscb = scb->hscb; 1599 cmd->host_scribble = (char *)scb; 1600 1601 /* 1602 * Fill out basics of the HSCB. 1603 */ 1604 hscb->control = 0; 1605 hscb->scsiid = BUILD_SCSIID(ahd, cmd); 1606 hscb->lun = cmd->device->lun; 1607 scb->hscb->task_management = 0; 1608 mask = SCB_GET_TARGET_MASK(ahd, scb); 1609 1610 if ((ahd->user_discenable & mask) != 0) 1611 hscb->control |= DISCENB; 1612 1613 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1614 scb->flags |= SCB_PACKETIZED; 1615 1616 if ((tstate->auto_negotiate & mask) != 0) { 1617 scb->flags |= SCB_AUTO_NEGOTIATE; 1618 scb->hscb->control |= MK_MESSAGE; 1619 } 1620 1621 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1622 int msg_bytes; 1623 uint8_t tag_msgs[2]; 1624 1625 msg_bytes = scsi_populate_tag_msg(cmd, tag_msgs); 1626 if (msg_bytes && tag_msgs[0] != MSG_SIMPLE_TASK) { 1627 hscb->control |= tag_msgs[0]; 1628 if (tag_msgs[0] == MSG_ORDERED_TASK) 1629 dev->commands_since_idle_or_otag = 0; 1630 } else 1631 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1632 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1633 hscb->control |= MSG_ORDERED_TASK; 1634 dev->commands_since_idle_or_otag = 0; 1635 } else { 1636 hscb->control |= MSG_SIMPLE_TASK; 1637 } 1638 } 1639 1640 hscb->cdb_len = cmd->cmd_len; 1641 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1642 1643 scb->platform_data->xfer_len = 0; 1644 ahd_set_residual(scb, 0); 1645 ahd_set_sense_residual(scb, 0); 1646 scb->sg_count = 0; 1647 1648 if (nseg > 0) { 1649 void *sg = scb->sg_list; 1650 struct scatterlist *cur_seg; 1651 int i; 1652 1653 scb->platform_data->xfer_len = 0; 1654 1655 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1656 dma_addr_t addr; 1657 bus_size_t len; 1658 1659 addr = sg_dma_address(cur_seg); 1660 len = sg_dma_len(cur_seg); 1661 scb->platform_data->xfer_len += len; 1662 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1663 i == (nseg - 1)); 1664 } 1665 } 1666 1667 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1668 dev->openings--; 1669 dev->active++; 1670 dev->commands_issued++; 1671 1672 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1673 dev->commands_since_idle_or_otag++; 1674 scb->flags |= SCB_ACTIVE; 1675 ahd_queue_scb(ahd, scb); 1676 1677 ahd_unlock(ahd, &flags); 1678 1679 return 0; 1680 } 1681 1682 /* 1683 * SCSI controller interrupt handler. 1684 */ 1685 irqreturn_t 1686 ahd_linux_isr(int irq, void *dev_id) 1687 { 1688 struct ahd_softc *ahd; 1689 u_long flags; 1690 int ours; 1691 1692 ahd = (struct ahd_softc *) dev_id; 1693 ahd_lock(ahd, &flags); 1694 ours = ahd_intr(ahd); 1695 ahd_unlock(ahd, &flags); 1696 return IRQ_RETVAL(ours); 1697 } 1698 1699 void 1700 ahd_send_async(struct ahd_softc *ahd, char channel, 1701 u_int target, u_int lun, ac_code code) 1702 { 1703 switch (code) { 1704 case AC_TRANSFER_NEG: 1705 { 1706 char buf[80]; 1707 struct scsi_target *starget; 1708 struct info_str info; 1709 struct ahd_initiator_tinfo *tinfo; 1710 struct ahd_tmode_tstate *tstate; 1711 unsigned int target_ppr_options; 1712 1713 BUG_ON(target == CAM_TARGET_WILDCARD); 1714 1715 info.buffer = buf; 1716 info.length = sizeof(buf); 1717 info.offset = 0; 1718 info.pos = 0; 1719 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1720 target, &tstate); 1721 1722 /* 1723 * Don't bother reporting results while 1724 * negotiations are still pending. 1725 */ 1726 if (tinfo->curr.period != tinfo->goal.period 1727 || tinfo->curr.width != tinfo->goal.width 1728 || tinfo->curr.offset != tinfo->goal.offset 1729 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1730 if (bootverbose == 0) 1731 break; 1732 1733 /* 1734 * Don't bother reporting results that 1735 * are identical to those last reported. 1736 */ 1737 starget = ahd->platform_data->starget[target]; 1738 if (starget == NULL) 1739 break; 1740 1741 target_ppr_options = 1742 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1743 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1744 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1745 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1746 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1747 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1748 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1749 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1750 1751 if (tinfo->curr.period == spi_period(starget) 1752 && tinfo->curr.width == spi_width(starget) 1753 && tinfo->curr.offset == spi_offset(starget) 1754 && tinfo->curr.ppr_options == target_ppr_options) 1755 if (bootverbose == 0) 1756 break; 1757 1758 spi_period(starget) = tinfo->curr.period; 1759 spi_width(starget) = tinfo->curr.width; 1760 spi_offset(starget) = tinfo->curr.offset; 1761 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1762 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1763 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1764 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1765 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1766 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1767 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1768 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1769 spi_display_xfer_agreement(starget); 1770 break; 1771 } 1772 case AC_SENT_BDR: 1773 { 1774 WARN_ON(lun != CAM_LUN_WILDCARD); 1775 scsi_report_device_reset(ahd->platform_data->host, 1776 channel - 'A', target); 1777 break; 1778 } 1779 case AC_BUS_RESET: 1780 if (ahd->platform_data->host != NULL) { 1781 scsi_report_bus_reset(ahd->platform_data->host, 1782 channel - 'A'); 1783 } 1784 break; 1785 default: 1786 panic("ahd_send_async: Unexpected async event"); 1787 } 1788 } 1789 1790 /* 1791 * Calls the higher level scsi done function and frees the scb. 1792 */ 1793 void 1794 ahd_done(struct ahd_softc *ahd, struct scb *scb) 1795 { 1796 struct scsi_cmnd *cmd; 1797 struct ahd_linux_device *dev; 1798 1799 if ((scb->flags & SCB_ACTIVE) == 0) { 1800 printf("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1801 ahd_dump_card_state(ahd); 1802 panic("Stopping for safety"); 1803 } 1804 LIST_REMOVE(scb, pending_links); 1805 cmd = scb->io_ctx; 1806 dev = scb->platform_data->dev; 1807 dev->active--; 1808 dev->openings++; 1809 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1810 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1811 dev->qfrozen--; 1812 } 1813 ahd_linux_unmap_scb(ahd, scb); 1814 1815 /* 1816 * Guard against stale sense data. 1817 * The Linux mid-layer assumes that sense 1818 * was retrieved anytime the first byte of 1819 * the sense buffer looks "sane". 1820 */ 1821 cmd->sense_buffer[0] = 0; 1822 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1823 uint32_t amount_xferred; 1824 1825 amount_xferred = 1826 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1827 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1828 #ifdef AHD_DEBUG 1829 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1830 ahd_print_path(ahd, scb); 1831 printf("Set CAM_UNCOR_PARITY\n"); 1832 } 1833 #endif 1834 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1835 #ifdef AHD_REPORT_UNDERFLOWS 1836 /* 1837 * This code is disabled by default as some 1838 * clients of the SCSI system do not properly 1839 * initialize the underflow parameter. This 1840 * results in spurious termination of commands 1841 * that complete as expected (e.g. underflow is 1842 * allowed as command can return variable amounts 1843 * of data. 1844 */ 1845 } else if (amount_xferred < scb->io_ctx->underflow) { 1846 u_int i; 1847 1848 ahd_print_path(ahd, scb); 1849 printf("CDB:"); 1850 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1851 printf(" 0x%x", scb->io_ctx->cmnd[i]); 1852 printf("\n"); 1853 ahd_print_path(ahd, scb); 1854 printf("Saw underflow (%ld of %ld bytes). " 1855 "Treated as error\n", 1856 ahd_get_residual(scb), 1857 ahd_get_transfer_length(scb)); 1858 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1859 #endif 1860 } else { 1861 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1862 } 1863 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1864 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1865 } 1866 1867 if (dev->openings == 1 1868 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1869 && ahd_get_scsi_status(scb) != SCSI_STATUS_QUEUE_FULL) 1870 dev->tag_success_count++; 1871 /* 1872 * Some devices deal with temporary internal resource 1873 * shortages by returning queue full. When the queue 1874 * full occurrs, we throttle back. Slowly try to get 1875 * back to our previous queue depth. 1876 */ 1877 if ((dev->openings + dev->active) < dev->maxtags 1878 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1879 dev->tag_success_count = 0; 1880 dev->openings++; 1881 } 1882 1883 if (dev->active == 0) 1884 dev->commands_since_idle_or_otag = 0; 1885 1886 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1887 printf("Recovery SCB completes\n"); 1888 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1889 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1890 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1891 1892 if (ahd->platform_data->eh_done) 1893 complete(ahd->platform_data->eh_done); 1894 } 1895 1896 ahd_free_scb(ahd, scb); 1897 ahd_linux_queue_cmd_complete(ahd, cmd); 1898 } 1899 1900 static void 1901 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1902 struct scsi_device *sdev, struct scb *scb) 1903 { 1904 struct ahd_devinfo devinfo; 1905 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1906 1907 ahd_compile_devinfo(&devinfo, 1908 ahd->our_id, 1909 sdev->sdev_target->id, sdev->lun, 1910 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1911 ROLE_INITIATOR); 1912 1913 /* 1914 * We don't currently trust the mid-layer to 1915 * properly deal with queue full or busy. So, 1916 * when one occurs, we tell the mid-layer to 1917 * unconditionally requeue the command to us 1918 * so that we can retry it ourselves. We also 1919 * implement our own throttling mechanism so 1920 * we don't clobber the device with too many 1921 * commands. 1922 */ 1923 switch (ahd_get_scsi_status(scb)) { 1924 default: 1925 break; 1926 case SCSI_STATUS_CHECK_COND: 1927 case SCSI_STATUS_CMD_TERMINATED: 1928 { 1929 struct scsi_cmnd *cmd; 1930 1931 /* 1932 * Copy sense information to the OS's cmd 1933 * structure if it is available. 1934 */ 1935 cmd = scb->io_ctx; 1936 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1937 struct scsi_status_iu_header *siu; 1938 u_int sense_size; 1939 u_int sense_offset; 1940 1941 if (scb->flags & SCB_SENSE) { 1942 sense_size = min(sizeof(struct scsi_sense_data) 1943 - ahd_get_sense_residual(scb), 1944 (u_long)SCSI_SENSE_BUFFERSIZE); 1945 sense_offset = 0; 1946 } else { 1947 /* 1948 * Copy only the sense data into the provided 1949 * buffer. 1950 */ 1951 siu = (struct scsi_status_iu_header *) 1952 scb->sense_data; 1953 sense_size = min_t(size_t, 1954 scsi_4btoul(siu->sense_length), 1955 SCSI_SENSE_BUFFERSIZE); 1956 sense_offset = SIU_SENSE_OFFSET(siu); 1957 } 1958 1959 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1960 memcpy(cmd->sense_buffer, 1961 ahd_get_sense_buf(ahd, scb) 1962 + sense_offset, sense_size); 1963 cmd->result |= (DRIVER_SENSE << 24); 1964 1965 #ifdef AHD_DEBUG 1966 if (ahd_debug & AHD_SHOW_SENSE) { 1967 int i; 1968 1969 printf("Copied %d bytes of sense data at %d:", 1970 sense_size, sense_offset); 1971 for (i = 0; i < sense_size; i++) { 1972 if ((i & 0xF) == 0) 1973 printf("\n"); 1974 printf("0x%x ", cmd->sense_buffer[i]); 1975 } 1976 printf("\n"); 1977 } 1978 #endif 1979 } 1980 break; 1981 } 1982 case SCSI_STATUS_QUEUE_FULL: 1983 /* 1984 * By the time the core driver has returned this 1985 * command, all other commands that were queued 1986 * to us but not the device have been returned. 1987 * This ensures that dev->active is equal to 1988 * the number of commands actually queued to 1989 * the device. 1990 */ 1991 dev->tag_success_count = 0; 1992 if (dev->active != 0) { 1993 /* 1994 * Drop our opening count to the number 1995 * of commands currently outstanding. 1996 */ 1997 dev->openings = 0; 1998 #ifdef AHD_DEBUG 1999 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 2000 ahd_print_path(ahd, scb); 2001 printf("Dropping tag count to %d\n", 2002 dev->active); 2003 } 2004 #endif 2005 if (dev->active == dev->tags_on_last_queuefull) { 2006 2007 dev->last_queuefull_same_count++; 2008 /* 2009 * If we repeatedly see a queue full 2010 * at the same queue depth, this 2011 * device has a fixed number of tag 2012 * slots. Lock in this tag depth 2013 * so we stop seeing queue fulls from 2014 * this device. 2015 */ 2016 if (dev->last_queuefull_same_count 2017 == AHD_LOCK_TAGS_COUNT) { 2018 dev->maxtags = dev->active; 2019 ahd_print_path(ahd, scb); 2020 printf("Locking max tag count at %d\n", 2021 dev->active); 2022 } 2023 } else { 2024 dev->tags_on_last_queuefull = dev->active; 2025 dev->last_queuefull_same_count = 0; 2026 } 2027 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 2028 ahd_set_scsi_status(scb, SCSI_STATUS_OK); 2029 ahd_platform_set_tags(ahd, sdev, &devinfo, 2030 (dev->flags & AHD_DEV_Q_BASIC) 2031 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2032 break; 2033 } 2034 /* 2035 * Drop down to a single opening, and treat this 2036 * as if the target returned BUSY SCSI status. 2037 */ 2038 dev->openings = 1; 2039 ahd_platform_set_tags(ahd, sdev, &devinfo, 2040 (dev->flags & AHD_DEV_Q_BASIC) 2041 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2042 ahd_set_scsi_status(scb, SCSI_STATUS_BUSY); 2043 } 2044 } 2045 2046 static void 2047 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 2048 { 2049 int status; 2050 int new_status = DID_OK; 2051 int do_fallback = 0; 2052 int scsi_status; 2053 2054 /* 2055 * Map CAM error codes into Linux Error codes. We 2056 * avoid the conversion so that the DV code has the 2057 * full error information available when making 2058 * state change decisions. 2059 */ 2060 2061 status = ahd_cmd_get_transaction_status(cmd); 2062 switch (status) { 2063 case CAM_REQ_INPROG: 2064 case CAM_REQ_CMP: 2065 new_status = DID_OK; 2066 break; 2067 case CAM_AUTOSENSE_FAIL: 2068 new_status = DID_ERROR; 2069 /* Fallthrough */ 2070 case CAM_SCSI_STATUS_ERROR: 2071 scsi_status = ahd_cmd_get_scsi_status(cmd); 2072 2073 switch(scsi_status) { 2074 case SCSI_STATUS_CMD_TERMINATED: 2075 case SCSI_STATUS_CHECK_COND: 2076 if ((cmd->result >> 24) != DRIVER_SENSE) { 2077 do_fallback = 1; 2078 } else { 2079 struct scsi_sense_data *sense; 2080 2081 sense = (struct scsi_sense_data *) 2082 cmd->sense_buffer; 2083 if (sense->extra_len >= 5 && 2084 (sense->add_sense_code == 0x47 2085 || sense->add_sense_code == 0x48)) 2086 do_fallback = 1; 2087 } 2088 break; 2089 default: 2090 break; 2091 } 2092 break; 2093 case CAM_REQ_ABORTED: 2094 new_status = DID_ABORT; 2095 break; 2096 case CAM_BUSY: 2097 new_status = DID_BUS_BUSY; 2098 break; 2099 case CAM_REQ_INVALID: 2100 case CAM_PATH_INVALID: 2101 new_status = DID_BAD_TARGET; 2102 break; 2103 case CAM_SEL_TIMEOUT: 2104 new_status = DID_NO_CONNECT; 2105 break; 2106 case CAM_SCSI_BUS_RESET: 2107 case CAM_BDR_SENT: 2108 new_status = DID_RESET; 2109 break; 2110 case CAM_UNCOR_PARITY: 2111 new_status = DID_PARITY; 2112 do_fallback = 1; 2113 break; 2114 case CAM_CMD_TIMEOUT: 2115 new_status = DID_TIME_OUT; 2116 do_fallback = 1; 2117 break; 2118 case CAM_REQ_CMP_ERR: 2119 case CAM_UNEXP_BUSFREE: 2120 case CAM_DATA_RUN_ERR: 2121 new_status = DID_ERROR; 2122 do_fallback = 1; 2123 break; 2124 case CAM_UA_ABORT: 2125 case CAM_NO_HBA: 2126 case CAM_SEQUENCE_FAIL: 2127 case CAM_CCB_LEN_ERR: 2128 case CAM_PROVIDE_FAIL: 2129 case CAM_REQ_TERMIO: 2130 case CAM_UNREC_HBA_ERROR: 2131 case CAM_REQ_TOO_BIG: 2132 new_status = DID_ERROR; 2133 break; 2134 case CAM_REQUEUE_REQ: 2135 new_status = DID_REQUEUE; 2136 break; 2137 default: 2138 /* We should never get here */ 2139 new_status = DID_ERROR; 2140 break; 2141 } 2142 2143 if (do_fallback) { 2144 printf("%s: device overrun (status %x) on %d:%d:%d\n", 2145 ahd_name(ahd), status, cmd->device->channel, 2146 cmd->device->id, cmd->device->lun); 2147 } 2148 2149 ahd_cmd_set_transaction_status(cmd, new_status); 2150 2151 cmd->scsi_done(cmd); 2152 } 2153 2154 static void 2155 ahd_freeze_simq(struct ahd_softc *ahd) 2156 { 2157 scsi_block_requests(ahd->platform_data->host); 2158 } 2159 2160 static void 2161 ahd_release_simq(struct ahd_softc *ahd) 2162 { 2163 scsi_unblock_requests(ahd->platform_data->host); 2164 } 2165 2166 static int 2167 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2168 { 2169 struct ahd_softc *ahd; 2170 struct ahd_linux_device *dev; 2171 struct scb *pending_scb; 2172 u_int saved_scbptr; 2173 u_int active_scbptr; 2174 u_int last_phase; 2175 u_int saved_scsiid; 2176 u_int cdb_byte; 2177 int retval; 2178 int was_paused; 2179 int paused; 2180 int wait; 2181 int disconnected; 2182 ahd_mode_state saved_modes; 2183 unsigned long flags; 2184 2185 pending_scb = NULL; 2186 paused = FALSE; 2187 wait = FALSE; 2188 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2189 2190 scmd_printk(KERN_INFO, cmd, 2191 "Attempting to queue an ABORT message:"); 2192 2193 printf("CDB:"); 2194 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2195 printf(" 0x%x", cmd->cmnd[cdb_byte]); 2196 printf("\n"); 2197 2198 ahd_lock(ahd, &flags); 2199 2200 /* 2201 * First determine if we currently own this command. 2202 * Start by searching the device queue. If not found 2203 * there, check the pending_scb list. If not found 2204 * at all, and the system wanted us to just abort the 2205 * command, return success. 2206 */ 2207 dev = scsi_transport_device_data(cmd->device); 2208 2209 if (dev == NULL) { 2210 /* 2211 * No target device for this command exists, 2212 * so we must not still own the command. 2213 */ 2214 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2215 retval = SUCCESS; 2216 goto no_cmd; 2217 } 2218 2219 /* 2220 * See if we can find a matching cmd in the pending list. 2221 */ 2222 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2223 if (pending_scb->io_ctx == cmd) 2224 break; 2225 } 2226 2227 if (pending_scb == NULL) { 2228 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2229 goto no_cmd; 2230 } 2231 2232 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2233 /* 2234 * We can't queue two recovery actions using the same SCB 2235 */ 2236 retval = FAILED; 2237 goto done; 2238 } 2239 2240 /* 2241 * Ensure that the card doesn't do anything 2242 * behind our back. Also make sure that we 2243 * didn't "just" miss an interrupt that would 2244 * affect this cmd. 2245 */ 2246 was_paused = ahd_is_paused(ahd); 2247 ahd_pause_and_flushwork(ahd); 2248 paused = TRUE; 2249 2250 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2251 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2252 goto no_cmd; 2253 } 2254 2255 printf("%s: At time of recovery, card was %spaused\n", 2256 ahd_name(ahd), was_paused ? "" : "not "); 2257 ahd_dump_card_state(ahd); 2258 2259 disconnected = TRUE; 2260 if (ahd_search_qinfifo(ahd, cmd->device->id, 2261 cmd->device->channel + 'A', 2262 cmd->device->lun, 2263 pending_scb->hscb->tag, 2264 ROLE_INITIATOR, CAM_REQ_ABORTED, 2265 SEARCH_COMPLETE) > 0) { 2266 printf("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2267 ahd_name(ahd), cmd->device->channel, 2268 cmd->device->id, cmd->device->lun); 2269 retval = SUCCESS; 2270 goto done; 2271 } 2272 2273 saved_modes = ahd_save_modes(ahd); 2274 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2275 last_phase = ahd_inb(ahd, LASTPHASE); 2276 saved_scbptr = ahd_get_scbptr(ahd); 2277 active_scbptr = saved_scbptr; 2278 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2279 struct scb *bus_scb; 2280 2281 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2282 if (bus_scb == pending_scb) 2283 disconnected = FALSE; 2284 } 2285 2286 /* 2287 * At this point, pending_scb is the scb associated with the 2288 * passed in command. That command is currently active on the 2289 * bus or is in the disconnected state. 2290 */ 2291 saved_scsiid = ahd_inb(ahd, SAVED_SCSIID); 2292 if (last_phase != P_BUSFREE 2293 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2294 2295 /* 2296 * We're active on the bus, so assert ATN 2297 * and hope that the target responds. 2298 */ 2299 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2300 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2301 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2302 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2303 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2304 wait = TRUE; 2305 } else if (disconnected) { 2306 2307 /* 2308 * Actually re-queue this SCB in an attempt 2309 * to select the device before it reconnects. 2310 */ 2311 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2312 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2313 pending_scb->hscb->cdb_len = 0; 2314 pending_scb->hscb->task_attribute = 0; 2315 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2316 2317 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2318 /* 2319 * Mark the SCB has having an outstanding 2320 * task management function. Should the command 2321 * complete normally before the task management 2322 * function can be sent, the host will be notified 2323 * to abort our requeued SCB. 2324 */ 2325 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2326 pending_scb->hscb->task_management); 2327 } else { 2328 /* 2329 * If non-packetized, set the MK_MESSAGE control 2330 * bit indicating that we desire to send a message. 2331 * We also set the disconnected flag since there is 2332 * no guarantee that our SCB control byte matches 2333 * the version on the card. We don't want the 2334 * sequencer to abort the command thinking an 2335 * unsolicited reselection occurred. 2336 */ 2337 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2338 2339 /* 2340 * The sequencer will never re-reference the 2341 * in-core SCB. To make sure we are notified 2342 * during reslection, set the MK_MESSAGE flag in 2343 * the card's copy of the SCB. 2344 */ 2345 ahd_outb(ahd, SCB_CONTROL, 2346 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2347 } 2348 2349 /* 2350 * Clear out any entries in the QINFIFO first 2351 * so we are the next SCB for this target 2352 * to run. 2353 */ 2354 ahd_search_qinfifo(ahd, cmd->device->id, 2355 cmd->device->channel + 'A', cmd->device->lun, 2356 SCB_LIST_NULL, ROLE_INITIATOR, 2357 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2358 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2359 ahd_set_scbptr(ahd, saved_scbptr); 2360 ahd_print_path(ahd, pending_scb); 2361 printf("Device is disconnected, re-queuing SCB\n"); 2362 wait = TRUE; 2363 } else { 2364 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2365 retval = FAILED; 2366 goto done; 2367 } 2368 2369 no_cmd: 2370 /* 2371 * Our assumption is that if we don't have the command, no 2372 * recovery action was required, so we return success. Again, 2373 * the semantics of the mid-layer recovery engine are not 2374 * well defined, so this may change in time. 2375 */ 2376 retval = SUCCESS; 2377 done: 2378 if (paused) 2379 ahd_unpause(ahd); 2380 if (wait) { 2381 DECLARE_COMPLETION_ONSTACK(done); 2382 2383 ahd->platform_data->eh_done = &done; 2384 ahd_unlock(ahd, &flags); 2385 2386 printf("%s: Recovery code sleeping\n", ahd_name(ahd)); 2387 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2388 ahd_lock(ahd, &flags); 2389 ahd->platform_data->eh_done = NULL; 2390 ahd_unlock(ahd, &flags); 2391 printf("%s: Timer Expired (active %d)\n", 2392 ahd_name(ahd), dev->active); 2393 retval = FAILED; 2394 } 2395 printf("Recovery code awake\n"); 2396 } else 2397 ahd_unlock(ahd, &flags); 2398 2399 if (retval != SUCCESS) 2400 printf("%s: Command abort returning 0x%x\n", 2401 ahd_name(ahd), retval); 2402 2403 return retval; 2404 } 2405 2406 static void ahd_linux_set_width(struct scsi_target *starget, int width) 2407 { 2408 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2409 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2410 struct ahd_devinfo devinfo; 2411 unsigned long flags; 2412 2413 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2414 starget->channel + 'A', ROLE_INITIATOR); 2415 ahd_lock(ahd, &flags); 2416 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2417 ahd_unlock(ahd, &flags); 2418 } 2419 2420 static void ahd_linux_set_period(struct scsi_target *starget, int period) 2421 { 2422 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2423 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2424 struct ahd_tmode_tstate *tstate; 2425 struct ahd_initiator_tinfo *tinfo 2426 = ahd_fetch_transinfo(ahd, 2427 starget->channel + 'A', 2428 shost->this_id, starget->id, &tstate); 2429 struct ahd_devinfo devinfo; 2430 unsigned int ppr_options = tinfo->goal.ppr_options; 2431 unsigned int dt; 2432 unsigned long flags; 2433 unsigned long offset = tinfo->goal.offset; 2434 2435 #ifdef AHD_DEBUG 2436 if ((ahd_debug & AHD_SHOW_DV) != 0) 2437 printf("%s: set period to %d\n", ahd_name(ahd), period); 2438 #endif 2439 if (offset == 0) 2440 offset = MAX_OFFSET; 2441 2442 if (period < 8) 2443 period = 8; 2444 if (period < 10) { 2445 if (spi_max_width(starget)) { 2446 ppr_options |= MSG_EXT_PPR_DT_REQ; 2447 if (period == 8) 2448 ppr_options |= MSG_EXT_PPR_IU_REQ; 2449 } else 2450 period = 10; 2451 } 2452 2453 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2454 2455 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2456 starget->channel + 'A', ROLE_INITIATOR); 2457 2458 /* all PPR requests apart from QAS require wide transfers */ 2459 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2460 if (spi_width(starget) == 0) 2461 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2462 } 2463 2464 ahd_find_syncrate(ahd, &period, &ppr_options, 2465 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2466 2467 ahd_lock(ahd, &flags); 2468 ahd_set_syncrate(ahd, &devinfo, period, offset, 2469 ppr_options, AHD_TRANS_GOAL, FALSE); 2470 ahd_unlock(ahd, &flags); 2471 } 2472 2473 static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2474 { 2475 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2476 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2477 struct ahd_tmode_tstate *tstate; 2478 struct ahd_initiator_tinfo *tinfo 2479 = ahd_fetch_transinfo(ahd, 2480 starget->channel + 'A', 2481 shost->this_id, starget->id, &tstate); 2482 struct ahd_devinfo devinfo; 2483 unsigned int ppr_options = 0; 2484 unsigned int period = 0; 2485 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2486 unsigned long flags; 2487 2488 #ifdef AHD_DEBUG 2489 if ((ahd_debug & AHD_SHOW_DV) != 0) 2490 printf("%s: set offset to %d\n", ahd_name(ahd), offset); 2491 #endif 2492 2493 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2494 starget->channel + 'A', ROLE_INITIATOR); 2495 if (offset != 0) { 2496 period = tinfo->goal.period; 2497 ppr_options = tinfo->goal.ppr_options; 2498 ahd_find_syncrate(ahd, &period, &ppr_options, 2499 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2500 } 2501 2502 ahd_lock(ahd, &flags); 2503 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2504 AHD_TRANS_GOAL, FALSE); 2505 ahd_unlock(ahd, &flags); 2506 } 2507 2508 static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2509 { 2510 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2511 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2512 struct ahd_tmode_tstate *tstate; 2513 struct ahd_initiator_tinfo *tinfo 2514 = ahd_fetch_transinfo(ahd, 2515 starget->channel + 'A', 2516 shost->this_id, starget->id, &tstate); 2517 struct ahd_devinfo devinfo; 2518 unsigned int ppr_options = tinfo->goal.ppr_options 2519 & ~MSG_EXT_PPR_DT_REQ; 2520 unsigned int period = tinfo->goal.period; 2521 unsigned int width = tinfo->goal.width; 2522 unsigned long flags; 2523 2524 #ifdef AHD_DEBUG 2525 if ((ahd_debug & AHD_SHOW_DV) != 0) 2526 printf("%s: %s DT\n", ahd_name(ahd), 2527 dt ? "enabling" : "disabling"); 2528 #endif 2529 if (dt && spi_max_width(starget)) { 2530 ppr_options |= MSG_EXT_PPR_DT_REQ; 2531 if (!width) 2532 ahd_linux_set_width(starget, 1); 2533 } else { 2534 if (period <= 9) 2535 period = 10; /* If resetting DT, period must be >= 25ns */ 2536 /* IU is invalid without DT set */ 2537 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2538 } 2539 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2540 starget->channel + 'A', ROLE_INITIATOR); 2541 ahd_find_syncrate(ahd, &period, &ppr_options, 2542 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2543 2544 ahd_lock(ahd, &flags); 2545 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2546 ppr_options, AHD_TRANS_GOAL, FALSE); 2547 ahd_unlock(ahd, &flags); 2548 } 2549 2550 static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2551 { 2552 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2553 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2554 struct ahd_tmode_tstate *tstate; 2555 struct ahd_initiator_tinfo *tinfo 2556 = ahd_fetch_transinfo(ahd, 2557 starget->channel + 'A', 2558 shost->this_id, starget->id, &tstate); 2559 struct ahd_devinfo devinfo; 2560 unsigned int ppr_options = tinfo->goal.ppr_options 2561 & ~MSG_EXT_PPR_QAS_REQ; 2562 unsigned int period = tinfo->goal.period; 2563 unsigned int dt; 2564 unsigned long flags; 2565 2566 #ifdef AHD_DEBUG 2567 if ((ahd_debug & AHD_SHOW_DV) != 0) 2568 printf("%s: %s QAS\n", ahd_name(ahd), 2569 qas ? "enabling" : "disabling"); 2570 #endif 2571 2572 if (qas) { 2573 ppr_options |= MSG_EXT_PPR_QAS_REQ; 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_iu(struct scsi_target *starget, int iu) 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_IU_REQ; 2601 unsigned int period = tinfo->goal.period; 2602 unsigned int dt; 2603 unsigned long flags; 2604 2605 #ifdef AHD_DEBUG 2606 if ((ahd_debug & AHD_SHOW_DV) != 0) 2607 printf("%s: %s IU\n", ahd_name(ahd), 2608 iu ? "enabling" : "disabling"); 2609 #endif 2610 2611 if (iu && spi_max_width(starget)) { 2612 ppr_options |= MSG_EXT_PPR_IU_REQ; 2613 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2614 } 2615 2616 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2617 2618 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2619 starget->channel + 'A', ROLE_INITIATOR); 2620 ahd_find_syncrate(ahd, &period, &ppr_options, 2621 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2622 2623 ahd_lock(ahd, &flags); 2624 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2625 ppr_options, AHD_TRANS_GOAL, FALSE); 2626 ahd_unlock(ahd, &flags); 2627 } 2628 2629 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2630 { 2631 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2632 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2633 struct ahd_tmode_tstate *tstate; 2634 struct ahd_initiator_tinfo *tinfo 2635 = ahd_fetch_transinfo(ahd, 2636 starget->channel + 'A', 2637 shost->this_id, starget->id, &tstate); 2638 struct ahd_devinfo devinfo; 2639 unsigned int ppr_options = tinfo->goal.ppr_options 2640 & ~MSG_EXT_PPR_RD_STRM; 2641 unsigned int period = tinfo->goal.period; 2642 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2643 unsigned long flags; 2644 2645 #ifdef AHD_DEBUG 2646 if ((ahd_debug & AHD_SHOW_DV) != 0) 2647 printf("%s: %s Read Streaming\n", ahd_name(ahd), 2648 rdstrm ? "enabling" : "disabling"); 2649 #endif 2650 2651 if (rdstrm && spi_max_width(starget)) 2652 ppr_options |= MSG_EXT_PPR_RD_STRM; 2653 2654 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2655 starget->channel + 'A', ROLE_INITIATOR); 2656 ahd_find_syncrate(ahd, &period, &ppr_options, 2657 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2658 2659 ahd_lock(ahd, &flags); 2660 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2661 ppr_options, AHD_TRANS_GOAL, FALSE); 2662 ahd_unlock(ahd, &flags); 2663 } 2664 2665 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2666 { 2667 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2668 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2669 struct ahd_tmode_tstate *tstate; 2670 struct ahd_initiator_tinfo *tinfo 2671 = ahd_fetch_transinfo(ahd, 2672 starget->channel + 'A', 2673 shost->this_id, starget->id, &tstate); 2674 struct ahd_devinfo devinfo; 2675 unsigned int ppr_options = tinfo->goal.ppr_options 2676 & ~MSG_EXT_PPR_WR_FLOW; 2677 unsigned int period = tinfo->goal.period; 2678 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2679 unsigned long flags; 2680 2681 #ifdef AHD_DEBUG 2682 if ((ahd_debug & AHD_SHOW_DV) != 0) 2683 printf("%s: %s Write Flow Control\n", ahd_name(ahd), 2684 wrflow ? "enabling" : "disabling"); 2685 #endif 2686 2687 if (wrflow && spi_max_width(starget)) 2688 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2689 2690 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2691 starget->channel + 'A', ROLE_INITIATOR); 2692 ahd_find_syncrate(ahd, &period, &ppr_options, 2693 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2694 2695 ahd_lock(ahd, &flags); 2696 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2697 ppr_options, AHD_TRANS_GOAL, FALSE); 2698 ahd_unlock(ahd, &flags); 2699 } 2700 2701 static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2702 { 2703 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2704 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2705 struct ahd_tmode_tstate *tstate; 2706 struct ahd_initiator_tinfo *tinfo 2707 = ahd_fetch_transinfo(ahd, 2708 starget->channel + 'A', 2709 shost->this_id, starget->id, &tstate); 2710 struct ahd_devinfo devinfo; 2711 unsigned int ppr_options = tinfo->goal.ppr_options 2712 & ~MSG_EXT_PPR_RTI; 2713 unsigned int period = tinfo->goal.period; 2714 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2715 unsigned long flags; 2716 2717 if ((ahd->features & AHD_RTI) == 0) { 2718 #ifdef AHD_DEBUG 2719 if ((ahd_debug & AHD_SHOW_DV) != 0) 2720 printf("%s: RTI not available\n", ahd_name(ahd)); 2721 #endif 2722 return; 2723 } 2724 2725 #ifdef AHD_DEBUG 2726 if ((ahd_debug & AHD_SHOW_DV) != 0) 2727 printf("%s: %s RTI\n", ahd_name(ahd), 2728 rti ? "enabling" : "disabling"); 2729 #endif 2730 2731 if (rti && spi_max_width(starget)) 2732 ppr_options |= MSG_EXT_PPR_RTI; 2733 2734 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2735 starget->channel + 'A', ROLE_INITIATOR); 2736 ahd_find_syncrate(ahd, &period, &ppr_options, 2737 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2738 2739 ahd_lock(ahd, &flags); 2740 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2741 ppr_options, AHD_TRANS_GOAL, FALSE); 2742 ahd_unlock(ahd, &flags); 2743 } 2744 2745 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2746 { 2747 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2748 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2749 struct ahd_tmode_tstate *tstate; 2750 struct ahd_initiator_tinfo *tinfo 2751 = ahd_fetch_transinfo(ahd, 2752 starget->channel + 'A', 2753 shost->this_id, starget->id, &tstate); 2754 struct ahd_devinfo devinfo; 2755 unsigned int ppr_options = tinfo->goal.ppr_options 2756 & ~MSG_EXT_PPR_PCOMP_EN; 2757 unsigned int period = tinfo->goal.period; 2758 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2759 unsigned long flags; 2760 2761 #ifdef AHD_DEBUG 2762 if ((ahd_debug & AHD_SHOW_DV) != 0) 2763 printf("%s: %s Precompensation\n", ahd_name(ahd), 2764 pcomp ? "Enable" : "Disable"); 2765 #endif 2766 2767 if (pcomp && spi_max_width(starget)) { 2768 uint8_t precomp; 2769 2770 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 2771 const struct ahd_linux_iocell_opts *iocell_opts; 2772 2773 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2774 precomp = iocell_opts->precomp; 2775 } else { 2776 precomp = AIC79XX_DEFAULT_PRECOMP; 2777 } 2778 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2779 AHD_SET_PRECOMP(ahd, precomp); 2780 } else { 2781 AHD_SET_PRECOMP(ahd, 0); 2782 } 2783 2784 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2785 starget->channel + 'A', ROLE_INITIATOR); 2786 ahd_find_syncrate(ahd, &period, &ppr_options, 2787 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2788 2789 ahd_lock(ahd, &flags); 2790 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2791 ppr_options, AHD_TRANS_GOAL, FALSE); 2792 ahd_unlock(ahd, &flags); 2793 } 2794 2795 static void ahd_linux_set_hold_mcs(struct scsi_target *starget, int hold) 2796 { 2797 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2798 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2799 struct ahd_tmode_tstate *tstate; 2800 struct ahd_initiator_tinfo *tinfo 2801 = ahd_fetch_transinfo(ahd, 2802 starget->channel + 'A', 2803 shost->this_id, starget->id, &tstate); 2804 struct ahd_devinfo devinfo; 2805 unsigned int ppr_options = tinfo->goal.ppr_options 2806 & ~MSG_EXT_PPR_HOLD_MCS; 2807 unsigned int period = tinfo->goal.period; 2808 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2809 unsigned long flags; 2810 2811 if (hold && spi_max_width(starget)) 2812 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2813 2814 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2815 starget->channel + 'A', ROLE_INITIATOR); 2816 ahd_find_syncrate(ahd, &period, &ppr_options, 2817 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2818 2819 ahd_lock(ahd, &flags); 2820 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2821 ppr_options, AHD_TRANS_GOAL, FALSE); 2822 ahd_unlock(ahd, &flags); 2823 } 2824 2825 static void ahd_linux_get_signalling(struct Scsi_Host *shost) 2826 { 2827 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; 2828 unsigned long flags; 2829 u8 mode; 2830 2831 ahd_lock(ahd, &flags); 2832 ahd_pause(ahd); 2833 mode = ahd_inb(ahd, SBLKCTL); 2834 ahd_unpause(ahd); 2835 ahd_unlock(ahd, &flags); 2836 2837 if (mode & ENAB40) 2838 spi_signalling(shost) = SPI_SIGNAL_LVD; 2839 else if (mode & ENAB20) 2840 spi_signalling(shost) = SPI_SIGNAL_SE; 2841 else 2842 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2843 } 2844 2845 static struct spi_function_template ahd_linux_transport_functions = { 2846 .set_offset = ahd_linux_set_offset, 2847 .show_offset = 1, 2848 .set_period = ahd_linux_set_period, 2849 .show_period = 1, 2850 .set_width = ahd_linux_set_width, 2851 .show_width = 1, 2852 .set_dt = ahd_linux_set_dt, 2853 .show_dt = 1, 2854 .set_iu = ahd_linux_set_iu, 2855 .show_iu = 1, 2856 .set_qas = ahd_linux_set_qas, 2857 .show_qas = 1, 2858 .set_rd_strm = ahd_linux_set_rd_strm, 2859 .show_rd_strm = 1, 2860 .set_wr_flow = ahd_linux_set_wr_flow, 2861 .show_wr_flow = 1, 2862 .set_rti = ahd_linux_set_rti, 2863 .show_rti = 1, 2864 .set_pcomp_en = ahd_linux_set_pcomp_en, 2865 .show_pcomp_en = 1, 2866 .set_hold_mcs = ahd_linux_set_hold_mcs, 2867 .show_hold_mcs = 1, 2868 .get_signalling = ahd_linux_get_signalling, 2869 }; 2870 2871 static int __init 2872 ahd_linux_init(void) 2873 { 2874 int error = 0; 2875 2876 /* 2877 * If we've been passed any parameters, process them now. 2878 */ 2879 if (aic79xx) 2880 aic79xx_setup(aic79xx); 2881 2882 ahd_linux_transport_template = 2883 spi_attach_transport(&ahd_linux_transport_functions); 2884 if (!ahd_linux_transport_template) 2885 return -ENODEV; 2886 2887 scsi_transport_reserve_device(ahd_linux_transport_template, 2888 sizeof(struct ahd_linux_device)); 2889 2890 error = ahd_linux_pci_init(); 2891 if (error) 2892 spi_release_transport(ahd_linux_transport_template); 2893 return error; 2894 } 2895 2896 static void __exit 2897 ahd_linux_exit(void) 2898 { 2899 ahd_linux_pci_exit(); 2900 spi_release_transport(ahd_linux_transport_template); 2901 } 2902 2903 module_init(ahd_linux_init); 2904 module_exit(ahd_linux_exit); 2905