1 /* 2 * Adaptec AIC79xx device driver for Linux. 3 * 4 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic79xx_osm.c#171 $ 5 * 6 * -------------------------------------------------------------------------- 7 * Copyright (c) 1994-2000 Justin T. Gibbs. 8 * Copyright (c) 1997-1999 Doug Ledford 9 * Copyright (c) 2000-2003 Adaptec Inc. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions, and the following disclaimer, 17 * without modification. 18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 19 * substantially similar to the "NO WARRANTY" disclaimer below 20 * ("Disclaimer") and any redistribution must be conditioned upon 21 * including a substantially similar Disclaimer requirement for further 22 * binary redistribution. 23 * 3. Neither the names of the above-listed copyright holders nor the names 24 * of any contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * Alternatively, this software may be distributed under the terms of the 28 * GNU General Public License ("GPL") version 2 as published by the Free 29 * Software Foundation. 30 * 31 * NO WARRANTY 32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 42 * POSSIBILITY OF SUCH DAMAGES. 43 */ 44 45 #include "aic79xx_osm.h" 46 #include "aic79xx_inline.h" 47 #include <scsi/scsicam.h> 48 49 static struct scsi_transport_template *ahd_linux_transport_template = NULL; 50 51 #include <linux/init.h> /* __setup */ 52 #include <linux/mm.h> /* For fetching system memory size */ 53 #include <linux/blkdev.h> /* For block_size() */ 54 #include <linux/delay.h> /* For ssleep/msleep */ 55 #include <linux/device.h> 56 #include <linux/slab.h> 57 58 /* 59 * Bucket size for counting good commands in between bad ones. 60 */ 61 #define AHD_LINUX_ERR_THRESH 1000 62 63 /* 64 * Set this to the delay in seconds after SCSI bus reset. 65 * Note, we honor this only for the initial bus reset. 66 * The scsi error recovery code performs its own bus settle 67 * delay handling for error recovery actions. 68 */ 69 #ifdef CONFIG_AIC79XX_RESET_DELAY_MS 70 #define AIC79XX_RESET_DELAY CONFIG_AIC79XX_RESET_DELAY_MS 71 #else 72 #define AIC79XX_RESET_DELAY 5000 73 #endif 74 75 /* 76 * To change the default number of tagged transactions allowed per-device, 77 * add a line to the lilo.conf file like: 78 * append="aic79xx=verbose,tag_info:{{32,32,32,32},{32,32,32,32}}" 79 * which will result in the first four devices on the first two 80 * controllers being set to a tagged queue depth of 32. 81 * 82 * The tag_commands is an array of 16 to allow for wide and twin adapters. 83 * Twin adapters will use indexes 0-7 for channel 0, and indexes 8-15 84 * for channel 1. 85 */ 86 typedef struct { 87 uint16_t tag_commands[16]; /* Allow for wide/twin adapters. */ 88 } adapter_tag_info_t; 89 90 /* 91 * Modify this as you see fit for your system. 92 * 93 * 0 tagged queuing disabled 94 * 1 <= n <= 253 n == max tags ever dispatched. 95 * 96 * The driver will throttle the number of commands dispatched to a 97 * device if it returns queue full. For devices with a fixed maximum 98 * queue depth, the driver will eventually determine this depth and 99 * lock it in (a console message is printed to indicate that a lock 100 * has occurred). On some devices, queue full is returned for a temporary 101 * resource shortage. These devices will return queue full at varying 102 * depths. The driver will throttle back when the queue fulls occur and 103 * attempt to slowly increase the depth over time as the device recovers 104 * from the resource shortage. 105 * 106 * In this example, the first line will disable tagged queueing for all 107 * the devices on the first probed aic79xx adapter. 108 * 109 * The second line enables tagged queueing with 4 commands/LUN for IDs 110 * (0, 2-11, 13-15), disables tagged queueing for ID 12, and tells the 111 * driver to attempt to use up to 64 tags for ID 1. 112 * 113 * The third line is the same as the first line. 114 * 115 * The fourth line disables tagged queueing for devices 0 and 3. It 116 * enables tagged queueing for the other IDs, with 16 commands/LUN 117 * for IDs 1 and 4, 127 commands/LUN for ID 8, and 4 commands/LUN for 118 * IDs 2, 5-7, and 9-15. 119 */ 120 121 /* 122 * NOTE: The below structure is for reference only, the actual structure 123 * to modify in order to change things is just below this comment block. 124 adapter_tag_info_t aic79xx_tag_info[] = 125 { 126 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 127 {{4, 64, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 0, 4, 4, 4}}, 128 {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, 129 {{0, 16, 4, 0, 16, 4, 4, 4, 127, 4, 4, 4, 4, 4, 4, 4}} 130 }; 131 */ 132 133 #ifdef CONFIG_AIC79XX_CMDS_PER_DEVICE 134 #define AIC79XX_CMDS_PER_DEVICE CONFIG_AIC79XX_CMDS_PER_DEVICE 135 #else 136 #define AIC79XX_CMDS_PER_DEVICE AHD_MAX_QUEUE 137 #endif 138 139 #define AIC79XX_CONFIGED_TAG_COMMANDS { \ 140 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 141 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 142 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 143 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 144 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 145 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 146 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE, \ 147 AIC79XX_CMDS_PER_DEVICE, AIC79XX_CMDS_PER_DEVICE \ 148 } 149 150 /* 151 * By default, use the number of commands specified by 152 * the users kernel configuration. 153 */ 154 static adapter_tag_info_t aic79xx_tag_info[] = 155 { 156 {AIC79XX_CONFIGED_TAG_COMMANDS}, 157 {AIC79XX_CONFIGED_TAG_COMMANDS}, 158 {AIC79XX_CONFIGED_TAG_COMMANDS}, 159 {AIC79XX_CONFIGED_TAG_COMMANDS}, 160 {AIC79XX_CONFIGED_TAG_COMMANDS}, 161 {AIC79XX_CONFIGED_TAG_COMMANDS}, 162 {AIC79XX_CONFIGED_TAG_COMMANDS}, 163 {AIC79XX_CONFIGED_TAG_COMMANDS}, 164 {AIC79XX_CONFIGED_TAG_COMMANDS}, 165 {AIC79XX_CONFIGED_TAG_COMMANDS}, 166 {AIC79XX_CONFIGED_TAG_COMMANDS}, 167 {AIC79XX_CONFIGED_TAG_COMMANDS}, 168 {AIC79XX_CONFIGED_TAG_COMMANDS}, 169 {AIC79XX_CONFIGED_TAG_COMMANDS}, 170 {AIC79XX_CONFIGED_TAG_COMMANDS}, 171 {AIC79XX_CONFIGED_TAG_COMMANDS} 172 }; 173 174 /* 175 * The I/O cell on the chip is very configurable in respect to its analog 176 * characteristics. Set the defaults here; they can be overriden with 177 * the proper insmod parameters. 178 */ 179 struct ahd_linux_iocell_opts 180 { 181 uint8_t precomp; 182 uint8_t slewrate; 183 uint8_t amplitude; 184 }; 185 #define AIC79XX_DEFAULT_PRECOMP 0xFF 186 #define AIC79XX_DEFAULT_SLEWRATE 0xFF 187 #define AIC79XX_DEFAULT_AMPLITUDE 0xFF 188 #define AIC79XX_DEFAULT_IOOPTS \ 189 { \ 190 AIC79XX_DEFAULT_PRECOMP, \ 191 AIC79XX_DEFAULT_SLEWRATE, \ 192 AIC79XX_DEFAULT_AMPLITUDE \ 193 } 194 #define AIC79XX_PRECOMP_INDEX 0 195 #define AIC79XX_SLEWRATE_INDEX 1 196 #define AIC79XX_AMPLITUDE_INDEX 2 197 static struct ahd_linux_iocell_opts aic79xx_iocell_info[] __ro_after_init = 198 { 199 AIC79XX_DEFAULT_IOOPTS, 200 AIC79XX_DEFAULT_IOOPTS, 201 AIC79XX_DEFAULT_IOOPTS, 202 AIC79XX_DEFAULT_IOOPTS, 203 AIC79XX_DEFAULT_IOOPTS, 204 AIC79XX_DEFAULT_IOOPTS, 205 AIC79XX_DEFAULT_IOOPTS, 206 AIC79XX_DEFAULT_IOOPTS, 207 AIC79XX_DEFAULT_IOOPTS, 208 AIC79XX_DEFAULT_IOOPTS, 209 AIC79XX_DEFAULT_IOOPTS, 210 AIC79XX_DEFAULT_IOOPTS, 211 AIC79XX_DEFAULT_IOOPTS, 212 AIC79XX_DEFAULT_IOOPTS, 213 AIC79XX_DEFAULT_IOOPTS, 214 AIC79XX_DEFAULT_IOOPTS 215 }; 216 217 /* 218 * There should be a specific return value for this in scsi.h, but 219 * it seems that most drivers ignore it. 220 */ 221 #define DID_UNDERFLOW DID_ERROR 222 223 void 224 ahd_print_path(struct ahd_softc *ahd, struct scb *scb) 225 { 226 printk("(scsi%d:%c:%d:%d): ", 227 ahd->platform_data->host->host_no, 228 scb != NULL ? SCB_GET_CHANNEL(ahd, scb) : 'X', 229 scb != NULL ? SCB_GET_TARGET(ahd, scb) : -1, 230 scb != NULL ? SCB_GET_LUN(scb) : -1); 231 } 232 233 /* 234 * XXX - these options apply unilaterally to _all_ adapters 235 * cards in the system. This should be fixed. Exceptions to this 236 * rule are noted in the comments. 237 */ 238 239 /* 240 * Skip the scsi bus reset. Non 0 make us skip the reset at startup. This 241 * has no effect on any later resets that might occur due to things like 242 * SCSI bus timeouts. 243 */ 244 static uint32_t aic79xx_no_reset; 245 246 /* 247 * Should we force EXTENDED translation on a controller. 248 * 0 == Use whatever is in the SEEPROM or default to off 249 * 1 == Use whatever is in the SEEPROM or default to on 250 */ 251 static uint32_t aic79xx_extended; 252 253 /* 254 * PCI bus parity checking of the Adaptec controllers. This is somewhat 255 * dubious at best. To my knowledge, this option has never actually 256 * solved a PCI parity problem, but on certain machines with broken PCI 257 * chipset configurations, it can generate tons of false error messages. 258 * It's included in the driver for completeness. 259 * 0 = Shut off PCI parity check 260 * non-0 = Enable PCI parity check 261 * 262 * NOTE: you can't actually pass -1 on the lilo prompt. So, to set this 263 * variable to -1 you would actually want to simply pass the variable 264 * name without a number. That will invert the 0 which will result in 265 * -1. 266 */ 267 static uint32_t aic79xx_pci_parity = ~0; 268 269 /* 270 * There are lots of broken chipsets in the world. Some of them will 271 * violate the PCI spec when we issue byte sized memory writes to our 272 * controller. I/O mapped register access, if allowed by the given 273 * platform, will work in almost all cases. 274 */ 275 uint32_t aic79xx_allow_memio = ~0; 276 277 /* 278 * So that we can set how long each device is given as a selection timeout. 279 * The table of values goes like this: 280 * 0 - 256ms 281 * 1 - 128ms 282 * 2 - 64ms 283 * 3 - 32ms 284 * We default to 256ms because some older devices need a longer time 285 * to respond to initial selection. 286 */ 287 static uint32_t aic79xx_seltime; 288 289 /* 290 * Certain devices do not perform any aging on commands. Should the 291 * device be saturated by commands in one portion of the disk, it is 292 * possible for transactions on far away sectors to never be serviced. 293 * To handle these devices, we can periodically send an ordered tag to 294 * force all outstanding transactions to be serviced prior to a new 295 * transaction. 296 */ 297 static uint32_t aic79xx_periodic_otag; 298 299 /* Some storage boxes are using an LSI chip which has a bug making it 300 * impossible to use aic79xx Rev B chip in 320 speeds. The following 301 * storage boxes have been reported to be buggy: 302 * EonStor 3U 16-Bay: U16U-G3A3 303 * EonStor 2U 12-Bay: U12U-G3A3 304 * SentinelRAID: 2500F R5 / R6 305 * SentinelRAID: 2500F R1 306 * SentinelRAID: 2500F/1500F 307 * SentinelRAID: 150F 308 * 309 * To get around this LSI bug, you can set your board to 160 mode 310 * or you can enable the SLOWCRC bit. 311 */ 312 uint32_t aic79xx_slowcrc; 313 314 /* 315 * Module information and settable options. 316 */ 317 static char *aic79xx = NULL; 318 319 MODULE_AUTHOR("Maintainer: Hannes Reinecke <hare@suse.de>"); 320 MODULE_DESCRIPTION("Adaptec AIC790X U320 SCSI Host Bus Adapter driver"); 321 MODULE_LICENSE("Dual BSD/GPL"); 322 MODULE_VERSION(AIC79XX_DRIVER_VERSION); 323 module_param(aic79xx, charp, 0444); 324 MODULE_PARM_DESC(aic79xx, 325 "period-delimited options string:\n" 326 " verbose Enable verbose/diagnostic logging\n" 327 " allow_memio Allow device registers to be memory mapped\n" 328 " debug Bitmask of debug values to enable\n" 329 " no_reset Suppress initial bus resets\n" 330 " extended Enable extended geometry on all controllers\n" 331 " periodic_otag Send an ordered tagged transaction\n" 332 " periodically to prevent tag starvation.\n" 333 " This may be required by some older disk\n" 334 " or drives/RAID arrays.\n" 335 " tag_info:<tag_str> Set per-target tag depth\n" 336 " global_tag_depth:<int> Global tag depth for all targets on all buses\n" 337 " slewrate:<slewrate_list>Set the signal slew rate (0-15).\n" 338 " precomp:<pcomp_list> Set the signal precompensation (0-7).\n" 339 " amplitude:<int> Set the signal amplitude (0-7).\n" 340 " seltime:<int> Selection Timeout:\n" 341 " (0/256ms,1/128ms,2/64ms,3/32ms)\n" 342 " slowcrc Turn on the SLOWCRC bit (Rev B only)\n" 343 "\n" 344 " Sample modprobe configuration file:\n" 345 " # Enable verbose logging\n" 346 " # Set tag depth on Controller 2/Target 2 to 10 tags\n" 347 " # Shorten the selection timeout to 128ms\n" 348 "\n" 349 " options aic79xx 'aic79xx=verbose.tag_info:{{}.{}.{..10}}.seltime:1'\n" 350 ); 351 352 static void ahd_linux_handle_scsi_status(struct ahd_softc *, 353 struct scsi_device *, 354 struct scb *); 355 static void ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, 356 struct scsi_cmnd *cmd); 357 static int ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd); 358 static void ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd); 359 static u_int ahd_linux_user_tagdepth(struct ahd_softc *ahd, 360 struct ahd_devinfo *devinfo); 361 static void ahd_linux_device_queue_depth(struct scsi_device *); 362 static int ahd_linux_run_command(struct ahd_softc*, 363 struct ahd_linux_device *, 364 struct scsi_cmnd *); 365 static void ahd_linux_setup_tag_info_global(char *p); 366 static int aic79xx_setup(char *c); 367 static void ahd_freeze_simq(struct ahd_softc *ahd); 368 static void ahd_release_simq(struct ahd_softc *ahd); 369 370 static int ahd_linux_unit; 371 372 373 /************************** OS Utility Wrappers *******************************/ 374 void ahd_delay(long); 375 void 376 ahd_delay(long usec) 377 { 378 /* 379 * udelay on Linux can have problems for 380 * multi-millisecond waits. Wait at most 381 * 1024us per call. 382 */ 383 while (usec > 0) { 384 udelay(usec % 1024); 385 usec -= 1024; 386 } 387 } 388 389 390 /***************************** Low Level I/O **********************************/ 391 uint8_t ahd_inb(struct ahd_softc * ahd, long port); 392 void ahd_outb(struct ahd_softc * ahd, long port, uint8_t val); 393 void ahd_outw_atomic(struct ahd_softc * ahd, 394 long port, uint16_t val); 395 void ahd_outsb(struct ahd_softc * ahd, long port, 396 uint8_t *, int count); 397 void ahd_insb(struct ahd_softc * ahd, long port, 398 uint8_t *, int count); 399 400 uint8_t 401 ahd_inb(struct ahd_softc * ahd, long port) 402 { 403 uint8_t x; 404 405 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 406 x = readb(ahd->bshs[0].maddr + port); 407 } else { 408 x = inb(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); 409 } 410 mb(); 411 return (x); 412 } 413 414 #if 0 /* unused */ 415 static uint16_t 416 ahd_inw_atomic(struct ahd_softc * ahd, long port) 417 { 418 uint8_t x; 419 420 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 421 x = readw(ahd->bshs[0].maddr + port); 422 } else { 423 x = inw(ahd->bshs[(port) >> 8].ioport + ((port) & 0xFF)); 424 } 425 mb(); 426 return (x); 427 } 428 #endif 429 430 void 431 ahd_outb(struct ahd_softc * ahd, long port, uint8_t val) 432 { 433 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 434 writeb(val, ahd->bshs[0].maddr + port); 435 } else { 436 outb(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); 437 } 438 mb(); 439 } 440 441 void 442 ahd_outw_atomic(struct ahd_softc * ahd, long port, uint16_t val) 443 { 444 if (ahd->tags[0] == BUS_SPACE_MEMIO) { 445 writew(val, ahd->bshs[0].maddr + port); 446 } else { 447 outw(val, ahd->bshs[(port) >> 8].ioport + (port & 0xFF)); 448 } 449 mb(); 450 } 451 452 void 453 ahd_outsb(struct ahd_softc * ahd, long port, uint8_t *array, int count) 454 { 455 int i; 456 457 /* 458 * There is probably a more efficient way to do this on Linux 459 * but we don't use this for anything speed critical and this 460 * should work. 461 */ 462 for (i = 0; i < count; i++) 463 ahd_outb(ahd, port, *array++); 464 } 465 466 void 467 ahd_insb(struct ahd_softc * ahd, long port, uint8_t *array, int count) 468 { 469 int i; 470 471 /* 472 * There is probably a more efficient way to do this on Linux 473 * but we don't use this for anything speed critical and this 474 * should work. 475 */ 476 for (i = 0; i < count; i++) 477 *array++ = ahd_inb(ahd, port); 478 } 479 480 /******************************* PCI Routines *********************************/ 481 uint32_t 482 ahd_pci_read_config(ahd_dev_softc_t pci, int reg, int width) 483 { 484 switch (width) { 485 case 1: 486 { 487 uint8_t retval; 488 489 pci_read_config_byte(pci, reg, &retval); 490 return (retval); 491 } 492 case 2: 493 { 494 uint16_t retval; 495 pci_read_config_word(pci, reg, &retval); 496 return (retval); 497 } 498 case 4: 499 { 500 uint32_t retval; 501 pci_read_config_dword(pci, reg, &retval); 502 return (retval); 503 } 504 default: 505 panic("ahd_pci_read_config: Read size too big"); 506 /* NOTREACHED */ 507 return (0); 508 } 509 } 510 511 void 512 ahd_pci_write_config(ahd_dev_softc_t pci, int reg, uint32_t value, int width) 513 { 514 switch (width) { 515 case 1: 516 pci_write_config_byte(pci, reg, value); 517 break; 518 case 2: 519 pci_write_config_word(pci, reg, value); 520 break; 521 case 4: 522 pci_write_config_dword(pci, reg, value); 523 break; 524 default: 525 panic("ahd_pci_write_config: Write size too big"); 526 /* NOTREACHED */ 527 } 528 } 529 530 /****************************** Inlines ***************************************/ 531 static void ahd_linux_unmap_scb(struct ahd_softc*, struct scb*); 532 533 static void 534 ahd_linux_unmap_scb(struct ahd_softc *ahd, struct scb *scb) 535 { 536 struct scsi_cmnd *cmd; 537 538 cmd = scb->io_ctx; 539 ahd_sync_sglist(ahd, scb, BUS_DMASYNC_POSTWRITE); 540 scsi_dma_unmap(cmd); 541 } 542 543 /******************************** Macros **************************************/ 544 static inline unsigned int ahd_build_scsiid(struct ahd_softc *ahd, 545 struct scsi_device *sdev) 546 { 547 return ((sdev_id(sdev) << TID_SHIFT) & TID) | (ahd)->our_id; 548 } 549 550 /* 551 * Return a string describing the driver. 552 */ 553 static const char * 554 ahd_linux_info(struct Scsi_Host *host) 555 { 556 static char buffer[512]; 557 char ahd_info[256]; 558 char *bp; 559 struct ahd_softc *ahd; 560 561 bp = &buffer[0]; 562 ahd = *(struct ahd_softc **)host->hostdata; 563 memset(bp, 0, sizeof(buffer)); 564 strcpy(bp, "Adaptec AIC79XX PCI-X SCSI HBA DRIVER, Rev " AIC79XX_DRIVER_VERSION "\n" 565 " <"); 566 strcat(bp, ahd->description); 567 strcat(bp, ">\n" 568 " "); 569 ahd_controller_info(ahd, ahd_info); 570 strcat(bp, ahd_info); 571 572 return (bp); 573 } 574 575 /* 576 * Queue an SCB to the controller. 577 */ 578 static int ahd_linux_queue_lck(struct scsi_cmnd *cmd) 579 { 580 struct ahd_softc *ahd; 581 struct ahd_linux_device *dev = scsi_transport_device_data(cmd->device); 582 int rtn = SCSI_MLQUEUE_HOST_BUSY; 583 584 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 585 586 cmd->result = CAM_REQ_INPROG << 16; 587 rtn = ahd_linux_run_command(ahd, dev, cmd); 588 589 return rtn; 590 } 591 592 static DEF_SCSI_QCMD(ahd_linux_queue) 593 594 static struct scsi_target ** 595 ahd_linux_target_in_softc(struct scsi_target *starget) 596 { 597 struct ahd_softc *ahd = 598 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 599 unsigned int target_offset; 600 601 target_offset = starget->id; 602 if (starget->channel != 0) 603 target_offset += 8; 604 605 return &ahd->platform_data->starget[target_offset]; 606 } 607 608 static int 609 ahd_linux_target_alloc(struct scsi_target *starget) 610 { 611 struct ahd_softc *ahd = 612 *((struct ahd_softc **)dev_to_shost(&starget->dev)->hostdata); 613 struct seeprom_config *sc = ahd->seep_config; 614 unsigned long flags; 615 struct scsi_target **ahd_targp = ahd_linux_target_in_softc(starget); 616 struct ahd_devinfo devinfo; 617 struct ahd_initiator_tinfo *tinfo; 618 struct ahd_tmode_tstate *tstate; 619 char channel = starget->channel + 'A'; 620 621 ahd_lock(ahd, &flags); 622 623 BUG_ON(*ahd_targp != NULL); 624 625 *ahd_targp = starget; 626 627 if (sc) { 628 int flags = sc->device_flags[starget->id]; 629 630 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 631 starget->id, &tstate); 632 633 if ((flags & CFPACKETIZED) == 0) { 634 /* don't negotiate packetized (IU) transfers */ 635 spi_max_iu(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_max_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 printk("%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 if (bootverbose) 705 sdev_printk(KERN_INFO, sdev, "Slave Configure\n"); 706 707 ahd_linux_device_queue_depth(sdev); 708 709 /* Initial Domain Validation */ 710 if (!spi_initial_dv(sdev->sdev_target)) 711 spi_dv_device(sdev); 712 713 return 0; 714 } 715 716 #if defined(__i386__) 717 /* 718 * Return the disk geometry for the given SCSI device. 719 */ 720 static int 721 ahd_linux_biosparam(struct scsi_device *sdev, struct block_device *bdev, 722 sector_t capacity, int geom[]) 723 { 724 int heads; 725 int sectors; 726 int cylinders; 727 int extended; 728 struct ahd_softc *ahd; 729 730 ahd = *((struct ahd_softc **)sdev->host->hostdata); 731 732 if (scsi_partsize(bdev, capacity, geom)) 733 return 0; 734 735 heads = 64; 736 sectors = 32; 737 cylinders = aic_sector_div(capacity, heads, sectors); 738 739 if (aic79xx_extended != 0) 740 extended = 1; 741 else 742 extended = (ahd->flags & AHD_EXTENDED_TRANS_A) != 0; 743 if (extended && cylinders >= 1024) { 744 heads = 255; 745 sectors = 63; 746 cylinders = aic_sector_div(capacity, heads, sectors); 747 } 748 geom[0] = heads; 749 geom[1] = sectors; 750 geom[2] = cylinders; 751 return (0); 752 } 753 #endif 754 755 /* 756 * Abort the current SCSI command(s). 757 */ 758 static int 759 ahd_linux_abort(struct scsi_cmnd *cmd) 760 { 761 return ahd_linux_queue_abort_cmd(cmd); 762 } 763 764 /* 765 * Attempt to send a target reset message to the device that timed out. 766 */ 767 static int 768 ahd_linux_dev_reset(struct scsi_cmnd *cmd) 769 { 770 struct ahd_softc *ahd; 771 struct ahd_linux_device *dev; 772 struct scb *reset_scb; 773 u_int cdb_byte; 774 int retval = SUCCESS; 775 struct ahd_initiator_tinfo *tinfo; 776 struct ahd_tmode_tstate *tstate; 777 unsigned long flags; 778 DECLARE_COMPLETION_ONSTACK(done); 779 780 reset_scb = NULL; 781 782 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 783 784 scmd_printk(KERN_INFO, cmd, 785 "Attempting to queue a TARGET RESET message:"); 786 787 printk("CDB:"); 788 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 789 printk(" 0x%x", cmd->cmnd[cdb_byte]); 790 printk("\n"); 791 792 /* 793 * Determine if we currently own this command. 794 */ 795 dev = scsi_transport_device_data(cmd->device); 796 797 if (dev == NULL) { 798 /* 799 * No target device for this command exists, 800 * so we must not still own the command. 801 */ 802 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 803 return SUCCESS; 804 } 805 806 /* 807 * Generate us a new SCB 808 */ 809 reset_scb = ahd_get_scb(ahd, AHD_NEVER_COL_IDX); 810 if (!reset_scb) { 811 scmd_printk(KERN_INFO, cmd, "No SCB available\n"); 812 return FAILED; 813 } 814 815 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 816 cmd->device->id, &tstate); 817 reset_scb->io_ctx = cmd; 818 reset_scb->platform_data->dev = dev; 819 reset_scb->sg_count = 0; 820 ahd_set_residual(reset_scb, 0); 821 ahd_set_sense_residual(reset_scb, 0); 822 reset_scb->platform_data->xfer_len = 0; 823 reset_scb->hscb->control = 0; 824 reset_scb->hscb->scsiid = ahd_build_scsiid(ahd, cmd->device); 825 reset_scb->hscb->lun = cmd->device->lun; 826 reset_scb->hscb->cdb_len = 0; 827 reset_scb->hscb->task_management = SIU_TASKMGMT_LUN_RESET; 828 reset_scb->flags |= SCB_DEVICE_RESET|SCB_RECOVERY_SCB|SCB_ACTIVE; 829 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 830 reset_scb->flags |= SCB_PACKETIZED; 831 } else { 832 reset_scb->hscb->control |= MK_MESSAGE; 833 } 834 dev->openings--; 835 dev->active++; 836 dev->commands_issued++; 837 838 ahd_lock(ahd, &flags); 839 840 LIST_INSERT_HEAD(&ahd->pending_scbs, reset_scb, pending_links); 841 ahd_queue_scb(ahd, reset_scb); 842 843 ahd->platform_data->eh_done = &done; 844 ahd_unlock(ahd, &flags); 845 846 printk("%s: Device reset code sleeping\n", ahd_name(ahd)); 847 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 848 ahd_lock(ahd, &flags); 849 ahd->platform_data->eh_done = NULL; 850 ahd_unlock(ahd, &flags); 851 printk("%s: Device reset timer expired (active %d)\n", 852 ahd_name(ahd), dev->active); 853 retval = FAILED; 854 } 855 printk("%s: Device reset returning 0x%x\n", ahd_name(ahd), retval); 856 857 return (retval); 858 } 859 860 /* 861 * Reset the SCSI bus. 862 */ 863 static int 864 ahd_linux_bus_reset(struct scsi_cmnd *cmd) 865 { 866 struct ahd_softc *ahd; 867 int found; 868 unsigned long flags; 869 870 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 871 #ifdef AHD_DEBUG 872 if ((ahd_debug & AHD_SHOW_RECOVERY) != 0) 873 printk("%s: Bus reset called for cmd %p\n", 874 ahd_name(ahd), cmd); 875 #endif 876 ahd_lock(ahd, &flags); 877 878 found = ahd_reset_channel(ahd, scmd_channel(cmd) + 'A', 879 /*initiate reset*/TRUE); 880 ahd_unlock(ahd, &flags); 881 882 if (bootverbose) 883 printk("%s: SCSI bus reset delivered. " 884 "%d SCBs aborted.\n", ahd_name(ahd), found); 885 886 return (SUCCESS); 887 } 888 889 struct scsi_host_template aic79xx_driver_template = { 890 .module = THIS_MODULE, 891 .name = "aic79xx", 892 .proc_name = "aic79xx", 893 .show_info = ahd_linux_show_info, 894 .write_info = ahd_proc_write_seeprom, 895 .info = ahd_linux_info, 896 .queuecommand = ahd_linux_queue, 897 .eh_abort_handler = ahd_linux_abort, 898 .eh_device_reset_handler = ahd_linux_dev_reset, 899 .eh_bus_reset_handler = ahd_linux_bus_reset, 900 #if defined(__i386__) 901 .bios_param = ahd_linux_biosparam, 902 #endif 903 .can_queue = AHD_MAX_QUEUE, 904 .this_id = -1, 905 .max_sectors = 8192, 906 .cmd_per_lun = 2, 907 .slave_alloc = ahd_linux_slave_alloc, 908 .slave_configure = ahd_linux_slave_configure, 909 .target_alloc = ahd_linux_target_alloc, 910 .target_destroy = ahd_linux_target_destroy, 911 }; 912 913 /******************************** Bus DMA *************************************/ 914 int 915 ahd_dma_tag_create(struct ahd_softc *ahd, bus_dma_tag_t parent, 916 bus_size_t alignment, bus_size_t boundary, 917 dma_addr_t lowaddr, dma_addr_t highaddr, 918 bus_dma_filter_t *filter, void *filterarg, 919 bus_size_t maxsize, int nsegments, 920 bus_size_t maxsegsz, int flags, bus_dma_tag_t *ret_tag) 921 { 922 bus_dma_tag_t dmat; 923 924 dmat = kmalloc(sizeof(*dmat), GFP_ATOMIC); 925 if (dmat == NULL) 926 return (ENOMEM); 927 928 /* 929 * Linux is very simplistic about DMA memory. For now don't 930 * maintain all specification information. Once Linux supplies 931 * better facilities for doing these operations, or the 932 * needs of this particular driver change, we might need to do 933 * more here. 934 */ 935 dmat->alignment = alignment; 936 dmat->boundary = boundary; 937 dmat->maxsize = maxsize; 938 *ret_tag = dmat; 939 return (0); 940 } 941 942 void 943 ahd_dma_tag_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat) 944 { 945 kfree(dmat); 946 } 947 948 int 949 ahd_dmamem_alloc(struct ahd_softc *ahd, bus_dma_tag_t dmat, void** vaddr, 950 int flags, bus_dmamap_t *mapp) 951 { 952 *vaddr = dma_alloc_coherent(&ahd->dev_softc->dev, dmat->maxsize, mapp, 953 GFP_ATOMIC); 954 if (*vaddr == NULL) 955 return (ENOMEM); 956 return(0); 957 } 958 959 void 960 ahd_dmamem_free(struct ahd_softc *ahd, bus_dma_tag_t dmat, 961 void* vaddr, bus_dmamap_t map) 962 { 963 dma_free_coherent(&ahd->dev_softc->dev, dmat->maxsize, vaddr, map); 964 } 965 966 int 967 ahd_dmamap_load(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map, 968 void *buf, bus_size_t buflen, bus_dmamap_callback_t *cb, 969 void *cb_arg, int flags) 970 { 971 /* 972 * Assume for now that this will only be used during 973 * initialization and not for per-transaction buffer mapping. 974 */ 975 bus_dma_segment_t stack_sg; 976 977 stack_sg.ds_addr = map; 978 stack_sg.ds_len = dmat->maxsize; 979 cb(cb_arg, &stack_sg, /*nseg*/1, /*error*/0); 980 return (0); 981 } 982 983 void 984 ahd_dmamap_destroy(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 985 { 986 } 987 988 int 989 ahd_dmamap_unload(struct ahd_softc *ahd, bus_dma_tag_t dmat, bus_dmamap_t map) 990 { 991 /* Nothing to do */ 992 return (0); 993 } 994 995 /********************* Platform Dependent Functions ***************************/ 996 static void 997 ahd_linux_setup_iocell_info(u_long index, int instance, int targ, int32_t value) 998 { 999 1000 if ((instance >= 0) 1001 && (instance < ARRAY_SIZE(aic79xx_iocell_info))) { 1002 uint8_t *iocell_info; 1003 1004 iocell_info = (uint8_t*)&aic79xx_iocell_info[instance]; 1005 iocell_info[index] = value & 0xFFFF; 1006 if (bootverbose) 1007 printk("iocell[%d:%ld] = %d\n", instance, index, value); 1008 } 1009 } 1010 1011 static void 1012 ahd_linux_setup_tag_info_global(char *p) 1013 { 1014 int tags, i, j; 1015 1016 tags = simple_strtoul(p + 1, NULL, 0) & 0xff; 1017 printk("Setting Global Tags= %d\n", tags); 1018 1019 for (i = 0; i < ARRAY_SIZE(aic79xx_tag_info); i++) { 1020 for (j = 0; j < AHD_NUM_TARGETS; j++) { 1021 aic79xx_tag_info[i].tag_commands[j] = tags; 1022 } 1023 } 1024 } 1025 1026 static void 1027 ahd_linux_setup_tag_info(u_long arg, int instance, int targ, int32_t value) 1028 { 1029 1030 if ((instance >= 0) && (targ >= 0) 1031 && (instance < ARRAY_SIZE(aic79xx_tag_info)) 1032 && (targ < AHD_NUM_TARGETS)) { 1033 aic79xx_tag_info[instance].tag_commands[targ] = value & 0x1FF; 1034 if (bootverbose) 1035 printk("tag_info[%d:%d] = %d\n", instance, targ, value); 1036 } 1037 } 1038 1039 static char * 1040 ahd_parse_brace_option(char *opt_name, char *opt_arg, char *end, int depth, 1041 void (*callback)(u_long, int, int, int32_t), 1042 u_long callback_arg) 1043 { 1044 char *tok_end; 1045 char *tok_end2; 1046 int i; 1047 int instance; 1048 int targ; 1049 int done; 1050 char tok_list[] = {'.', ',', '{', '}', '\0'}; 1051 1052 /* All options use a ':' name/arg separator */ 1053 if (*opt_arg != ':') 1054 return (opt_arg); 1055 opt_arg++; 1056 instance = -1; 1057 targ = -1; 1058 done = FALSE; 1059 /* 1060 * Restore separator that may be in 1061 * the middle of our option argument. 1062 */ 1063 tok_end = strchr(opt_arg, '\0'); 1064 if (tok_end < end) 1065 *tok_end = ','; 1066 while (!done) { 1067 switch (*opt_arg) { 1068 case '{': 1069 if (instance == -1) { 1070 instance = 0; 1071 } else { 1072 if (depth > 1) { 1073 if (targ == -1) 1074 targ = 0; 1075 } else { 1076 printk("Malformed Option %s\n", 1077 opt_name); 1078 done = TRUE; 1079 } 1080 } 1081 opt_arg++; 1082 break; 1083 case '}': 1084 if (targ != -1) 1085 targ = -1; 1086 else if (instance != -1) 1087 instance = -1; 1088 opt_arg++; 1089 break; 1090 case ',': 1091 case '.': 1092 if (instance == -1) 1093 done = TRUE; 1094 else if (targ >= 0) 1095 targ++; 1096 else if (instance >= 0) 1097 instance++; 1098 opt_arg++; 1099 break; 1100 case '\0': 1101 done = TRUE; 1102 break; 1103 default: 1104 tok_end = end; 1105 for (i = 0; tok_list[i]; i++) { 1106 tok_end2 = strchr(opt_arg, tok_list[i]); 1107 if ((tok_end2) && (tok_end2 < tok_end)) 1108 tok_end = tok_end2; 1109 } 1110 callback(callback_arg, instance, targ, 1111 simple_strtol(opt_arg, NULL, 0)); 1112 opt_arg = tok_end; 1113 break; 1114 } 1115 } 1116 return (opt_arg); 1117 } 1118 1119 /* 1120 * Handle Linux boot parameters. This routine allows for assigning a value 1121 * to a parameter with a ':' between the parameter and the value. 1122 * ie. aic79xx=stpwlev:1,extended 1123 */ 1124 static int 1125 aic79xx_setup(char *s) 1126 { 1127 int i, n; 1128 char *p; 1129 char *end; 1130 1131 static const struct { 1132 const char *name; 1133 uint32_t *flag; 1134 } options[] = { 1135 { "extended", &aic79xx_extended }, 1136 { "no_reset", &aic79xx_no_reset }, 1137 { "verbose", &aic79xx_verbose }, 1138 { "allow_memio", &aic79xx_allow_memio}, 1139 #ifdef AHD_DEBUG 1140 { "debug", &ahd_debug }, 1141 #endif 1142 { "periodic_otag", &aic79xx_periodic_otag }, 1143 { "pci_parity", &aic79xx_pci_parity }, 1144 { "seltime", &aic79xx_seltime }, 1145 { "tag_info", NULL }, 1146 { "global_tag_depth", NULL}, 1147 { "slewrate", NULL }, 1148 { "precomp", NULL }, 1149 { "amplitude", NULL }, 1150 { "slowcrc", &aic79xx_slowcrc }, 1151 }; 1152 1153 end = strchr(s, '\0'); 1154 1155 /* 1156 * XXX ia64 gcc isn't smart enough to know that ARRAY_SIZE 1157 * will never be 0 in this case. 1158 */ 1159 n = 0; 1160 1161 while ((p = strsep(&s, ",.")) != NULL) { 1162 if (*p == '\0') 1163 continue; 1164 for (i = 0; i < ARRAY_SIZE(options); i++) { 1165 1166 n = strlen(options[i].name); 1167 if (strncmp(options[i].name, p, n) == 0) 1168 break; 1169 } 1170 if (i == ARRAY_SIZE(options)) 1171 continue; 1172 1173 if (strncmp(p, "global_tag_depth", n) == 0) { 1174 ahd_linux_setup_tag_info_global(p + n); 1175 } else if (strncmp(p, "tag_info", n) == 0) { 1176 s = ahd_parse_brace_option("tag_info", p + n, end, 1177 2, ahd_linux_setup_tag_info, 0); 1178 } else if (strncmp(p, "slewrate", n) == 0) { 1179 s = ahd_parse_brace_option("slewrate", 1180 p + n, end, 1, ahd_linux_setup_iocell_info, 1181 AIC79XX_SLEWRATE_INDEX); 1182 } else if (strncmp(p, "precomp", n) == 0) { 1183 s = ahd_parse_brace_option("precomp", 1184 p + n, end, 1, ahd_linux_setup_iocell_info, 1185 AIC79XX_PRECOMP_INDEX); 1186 } else if (strncmp(p, "amplitude", n) == 0) { 1187 s = ahd_parse_brace_option("amplitude", 1188 p + n, end, 1, ahd_linux_setup_iocell_info, 1189 AIC79XX_AMPLITUDE_INDEX); 1190 } else if (p[n] == ':') { 1191 *(options[i].flag) = simple_strtoul(p + n + 1, NULL, 0); 1192 } else if (!strncmp(p, "verbose", n)) { 1193 *(options[i].flag) = 1; 1194 } else { 1195 *(options[i].flag) ^= 0xFFFFFFFF; 1196 } 1197 } 1198 return 1; 1199 } 1200 1201 __setup("aic79xx=", aic79xx_setup); 1202 1203 uint32_t aic79xx_verbose; 1204 1205 int 1206 ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *template) 1207 { 1208 char buf[80]; 1209 struct Scsi_Host *host; 1210 char *new_name; 1211 u_long s; 1212 int retval; 1213 1214 template->name = ahd->description; 1215 host = scsi_host_alloc(template, sizeof(struct ahd_softc *)); 1216 if (host == NULL) 1217 return (ENOMEM); 1218 1219 *((struct ahd_softc **)host->hostdata) = ahd; 1220 ahd->platform_data->host = host; 1221 host->can_queue = AHD_MAX_QUEUE; 1222 host->cmd_per_lun = 2; 1223 host->sg_tablesize = AHD_NSEG; 1224 host->this_id = ahd->our_id; 1225 host->irq = ahd->platform_data->irq; 1226 host->max_id = (ahd->features & AHD_WIDE) ? 16 : 8; 1227 host->max_lun = AHD_NUM_LUNS; 1228 host->max_channel = 0; 1229 host->sg_tablesize = AHD_NSEG; 1230 ahd_lock(ahd, &s); 1231 ahd_set_unit(ahd, ahd_linux_unit++); 1232 ahd_unlock(ahd, &s); 1233 sprintf(buf, "scsi%d", host->host_no); 1234 new_name = kmalloc(strlen(buf) + 1, GFP_ATOMIC); 1235 if (new_name != NULL) { 1236 strcpy(new_name, buf); 1237 ahd_set_name(ahd, new_name); 1238 } 1239 host->unique_id = ahd->unit; 1240 ahd_linux_initialize_scsi_bus(ahd); 1241 ahd_intr_enable(ahd, TRUE); 1242 1243 host->transportt = ahd_linux_transport_template; 1244 1245 retval = scsi_add_host(host, &ahd->dev_softc->dev); 1246 if (retval) { 1247 printk(KERN_WARNING "aic79xx: scsi_add_host failed\n"); 1248 scsi_host_put(host); 1249 return retval; 1250 } 1251 1252 scsi_scan_host(host); 1253 return 0; 1254 } 1255 1256 /* 1257 * Place the SCSI bus into a known state by either resetting it, 1258 * or forcing transfer negotiations on the next command to any 1259 * target. 1260 */ 1261 static void 1262 ahd_linux_initialize_scsi_bus(struct ahd_softc *ahd) 1263 { 1264 u_int target_id; 1265 u_int numtarg; 1266 unsigned long s; 1267 1268 target_id = 0; 1269 numtarg = 0; 1270 1271 if (aic79xx_no_reset != 0) 1272 ahd->flags &= ~AHD_RESET_BUS_A; 1273 1274 if ((ahd->flags & AHD_RESET_BUS_A) != 0) 1275 ahd_reset_channel(ahd, 'A', /*initiate_reset*/TRUE); 1276 else 1277 numtarg = (ahd->features & AHD_WIDE) ? 16 : 8; 1278 1279 ahd_lock(ahd, &s); 1280 1281 /* 1282 * Force negotiation to async for all targets that 1283 * will not see an initial bus reset. 1284 */ 1285 for (; target_id < numtarg; target_id++) { 1286 struct ahd_devinfo devinfo; 1287 struct ahd_initiator_tinfo *tinfo; 1288 struct ahd_tmode_tstate *tstate; 1289 1290 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1291 target_id, &tstate); 1292 ahd_compile_devinfo(&devinfo, ahd->our_id, target_id, 1293 CAM_LUN_WILDCARD, 'A', ROLE_INITIATOR); 1294 ahd_update_neg_request(ahd, &devinfo, tstate, 1295 tinfo, AHD_NEG_ALWAYS); 1296 } 1297 ahd_unlock(ahd, &s); 1298 /* Give the bus some time to recover */ 1299 if ((ahd->flags & AHD_RESET_BUS_A) != 0) { 1300 ahd_freeze_simq(ahd); 1301 msleep(AIC79XX_RESET_DELAY); 1302 ahd_release_simq(ahd); 1303 } 1304 } 1305 1306 int 1307 ahd_platform_alloc(struct ahd_softc *ahd, void *platform_arg) 1308 { 1309 ahd->platform_data = 1310 kzalloc(sizeof(struct ahd_platform_data), GFP_ATOMIC); 1311 if (ahd->platform_data == NULL) 1312 return (ENOMEM); 1313 ahd->platform_data->irq = AHD_LINUX_NOIRQ; 1314 ahd_lockinit(ahd); 1315 ahd->seltime = (aic79xx_seltime & 0x3) << 4; 1316 return (0); 1317 } 1318 1319 void 1320 ahd_platform_free(struct ahd_softc *ahd) 1321 { 1322 struct scsi_target *starget; 1323 int i; 1324 1325 if (ahd->platform_data != NULL) { 1326 /* destroy all of the device and target objects */ 1327 for (i = 0; i < AHD_NUM_TARGETS; i++) { 1328 starget = ahd->platform_data->starget[i]; 1329 if (starget != NULL) { 1330 ahd->platform_data->starget[i] = NULL; 1331 } 1332 } 1333 1334 if (ahd->platform_data->irq != AHD_LINUX_NOIRQ) 1335 free_irq(ahd->platform_data->irq, ahd); 1336 if (ahd->tags[0] == BUS_SPACE_PIO 1337 && ahd->bshs[0].ioport != 0) 1338 release_region(ahd->bshs[0].ioport, 256); 1339 if (ahd->tags[1] == BUS_SPACE_PIO 1340 && ahd->bshs[1].ioport != 0) 1341 release_region(ahd->bshs[1].ioport, 256); 1342 if (ahd->tags[0] == BUS_SPACE_MEMIO 1343 && ahd->bshs[0].maddr != NULL) { 1344 iounmap(ahd->bshs[0].maddr); 1345 release_mem_region(ahd->platform_data->mem_busaddr, 1346 0x1000); 1347 } 1348 if (ahd->platform_data->host) 1349 scsi_host_put(ahd->platform_data->host); 1350 1351 kfree(ahd->platform_data); 1352 } 1353 } 1354 1355 void 1356 ahd_platform_init(struct ahd_softc *ahd) 1357 { 1358 /* 1359 * Lookup and commit any modified IO Cell options. 1360 */ 1361 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 1362 const struct ahd_linux_iocell_opts *iocell_opts; 1363 1364 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 1365 if (iocell_opts->precomp != AIC79XX_DEFAULT_PRECOMP) 1366 AHD_SET_PRECOMP(ahd, iocell_opts->precomp); 1367 if (iocell_opts->slewrate != AIC79XX_DEFAULT_SLEWRATE) 1368 AHD_SET_SLEWRATE(ahd, iocell_opts->slewrate); 1369 if (iocell_opts->amplitude != AIC79XX_DEFAULT_AMPLITUDE) 1370 AHD_SET_AMPLITUDE(ahd, iocell_opts->amplitude); 1371 } 1372 1373 } 1374 1375 void 1376 ahd_platform_freeze_devq(struct ahd_softc *ahd, struct scb *scb) 1377 { 1378 ahd_platform_abort_scbs(ahd, SCB_GET_TARGET(ahd, scb), 1379 SCB_GET_CHANNEL(ahd, scb), 1380 SCB_GET_LUN(scb), SCB_LIST_NULL, 1381 ROLE_UNKNOWN, CAM_REQUEUE_REQ); 1382 } 1383 1384 void 1385 ahd_platform_set_tags(struct ahd_softc *ahd, struct scsi_device *sdev, 1386 struct ahd_devinfo *devinfo, ahd_queue_alg alg) 1387 { 1388 struct ahd_linux_device *dev; 1389 int was_queuing; 1390 int now_queuing; 1391 1392 if (sdev == NULL) 1393 return; 1394 1395 dev = scsi_transport_device_data(sdev); 1396 1397 if (dev == NULL) 1398 return; 1399 was_queuing = dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED); 1400 switch (alg) { 1401 default: 1402 case AHD_QUEUE_NONE: 1403 now_queuing = 0; 1404 break; 1405 case AHD_QUEUE_BASIC: 1406 now_queuing = AHD_DEV_Q_BASIC; 1407 break; 1408 case AHD_QUEUE_TAGGED: 1409 now_queuing = AHD_DEV_Q_TAGGED; 1410 break; 1411 } 1412 if ((dev->flags & AHD_DEV_FREEZE_TIL_EMPTY) == 0 1413 && (was_queuing != now_queuing) 1414 && (dev->active != 0)) { 1415 dev->flags |= AHD_DEV_FREEZE_TIL_EMPTY; 1416 dev->qfrozen++; 1417 } 1418 1419 dev->flags &= ~(AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED|AHD_DEV_PERIODIC_OTAG); 1420 if (now_queuing) { 1421 u_int usertags; 1422 1423 usertags = ahd_linux_user_tagdepth(ahd, devinfo); 1424 if (!was_queuing) { 1425 /* 1426 * Start out aggressively and allow our 1427 * dynamic queue depth algorithm to take 1428 * care of the rest. 1429 */ 1430 dev->maxtags = usertags; 1431 dev->openings = dev->maxtags - dev->active; 1432 } 1433 if (dev->maxtags == 0) { 1434 /* 1435 * Queueing is disabled by the user. 1436 */ 1437 dev->openings = 1; 1438 } else if (alg == AHD_QUEUE_TAGGED) { 1439 dev->flags |= AHD_DEV_Q_TAGGED; 1440 if (aic79xx_periodic_otag != 0) 1441 dev->flags |= AHD_DEV_PERIODIC_OTAG; 1442 } else 1443 dev->flags |= AHD_DEV_Q_BASIC; 1444 } else { 1445 /* We can only have one opening. */ 1446 dev->maxtags = 0; 1447 dev->openings = 1 - dev->active; 1448 } 1449 1450 switch ((dev->flags & (AHD_DEV_Q_BASIC|AHD_DEV_Q_TAGGED))) { 1451 case AHD_DEV_Q_BASIC: 1452 case AHD_DEV_Q_TAGGED: 1453 scsi_change_queue_depth(sdev, 1454 dev->openings + dev->active); 1455 break; 1456 default: 1457 /* 1458 * We allow the OS to queue 2 untagged transactions to 1459 * us at any time even though we can only execute them 1460 * serially on the controller/device. This should 1461 * remove some latency. 1462 */ 1463 scsi_change_queue_depth(sdev, 1); 1464 break; 1465 } 1466 } 1467 1468 int 1469 ahd_platform_abort_scbs(struct ahd_softc *ahd, int target, char channel, 1470 int lun, u_int tag, role_t role, uint32_t status) 1471 { 1472 return 0; 1473 } 1474 1475 static u_int 1476 ahd_linux_user_tagdepth(struct ahd_softc *ahd, struct ahd_devinfo *devinfo) 1477 { 1478 static int warned_user; 1479 u_int tags; 1480 1481 tags = 0; 1482 if ((ahd->user_discenable & devinfo->target_mask) != 0) { 1483 if (ahd->unit >= ARRAY_SIZE(aic79xx_tag_info)) { 1484 1485 if (warned_user == 0) { 1486 printk(KERN_WARNING 1487 "aic79xx: WARNING: Insufficient tag_info instances\n" 1488 "aic79xx: for installed controllers. Using defaults\n" 1489 "aic79xx: Please update the aic79xx_tag_info array in\n" 1490 "aic79xx: the aic79xx_osm.c source file.\n"); 1491 warned_user++; 1492 } 1493 tags = AHD_MAX_QUEUE; 1494 } else { 1495 adapter_tag_info_t *tag_info; 1496 1497 tag_info = &aic79xx_tag_info[ahd->unit]; 1498 tags = tag_info->tag_commands[devinfo->target_offset]; 1499 if (tags > AHD_MAX_QUEUE) 1500 tags = AHD_MAX_QUEUE; 1501 } 1502 } 1503 return (tags); 1504 } 1505 1506 /* 1507 * Determines the queue depth for a given device. 1508 */ 1509 static void 1510 ahd_linux_device_queue_depth(struct scsi_device *sdev) 1511 { 1512 struct ahd_devinfo devinfo; 1513 u_int tags; 1514 struct ahd_softc *ahd = *((struct ahd_softc **)sdev->host->hostdata); 1515 1516 ahd_compile_devinfo(&devinfo, 1517 ahd->our_id, 1518 sdev->sdev_target->id, sdev->lun, 1519 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1520 ROLE_INITIATOR); 1521 tags = ahd_linux_user_tagdepth(ahd, &devinfo); 1522 if (tags != 0 && sdev->tagged_supported != 0) { 1523 1524 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_TAGGED); 1525 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1526 devinfo.lun, AC_TRANSFER_NEG); 1527 ahd_print_devinfo(ahd, &devinfo); 1528 printk("Tagged Queuing enabled. Depth %d\n", tags); 1529 } else { 1530 ahd_platform_set_tags(ahd, sdev, &devinfo, AHD_QUEUE_NONE); 1531 ahd_send_async(ahd, devinfo.channel, devinfo.target, 1532 devinfo.lun, AC_TRANSFER_NEG); 1533 } 1534 } 1535 1536 static int 1537 ahd_linux_run_command(struct ahd_softc *ahd, struct ahd_linux_device *dev, 1538 struct scsi_cmnd *cmd) 1539 { 1540 struct scb *scb; 1541 struct hardware_scb *hscb; 1542 struct ahd_initiator_tinfo *tinfo; 1543 struct ahd_tmode_tstate *tstate; 1544 u_int col_idx; 1545 uint16_t mask; 1546 unsigned long flags; 1547 int nseg; 1548 1549 nseg = scsi_dma_map(cmd); 1550 if (nseg < 0) 1551 return SCSI_MLQUEUE_HOST_BUSY; 1552 1553 ahd_lock(ahd, &flags); 1554 1555 /* 1556 * Get an scb to use. 1557 */ 1558 tinfo = ahd_fetch_transinfo(ahd, 'A', ahd->our_id, 1559 cmd->device->id, &tstate); 1560 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) == 0 1561 || (tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) { 1562 col_idx = AHD_NEVER_COL_IDX; 1563 } else { 1564 col_idx = AHD_BUILD_COL_IDX(cmd->device->id, 1565 cmd->device->lun); 1566 } 1567 if ((scb = ahd_get_scb(ahd, col_idx)) == NULL) { 1568 ahd->flags |= AHD_RESOURCE_SHORTAGE; 1569 ahd_unlock(ahd, &flags); 1570 scsi_dma_unmap(cmd); 1571 return SCSI_MLQUEUE_HOST_BUSY; 1572 } 1573 1574 scb->io_ctx = cmd; 1575 scb->platform_data->dev = dev; 1576 hscb = scb->hscb; 1577 cmd->host_scribble = (char *)scb; 1578 1579 /* 1580 * Fill out basics of the HSCB. 1581 */ 1582 hscb->control = 0; 1583 hscb->scsiid = ahd_build_scsiid(ahd, cmd->device); 1584 hscb->lun = cmd->device->lun; 1585 scb->hscb->task_management = 0; 1586 mask = SCB_GET_TARGET_MASK(ahd, scb); 1587 1588 if ((ahd->user_discenable & mask) != 0) 1589 hscb->control |= DISCENB; 1590 1591 if ((tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ) != 0) 1592 scb->flags |= SCB_PACKETIZED; 1593 1594 if ((tstate->auto_negotiate & mask) != 0) { 1595 scb->flags |= SCB_AUTO_NEGOTIATE; 1596 scb->hscb->control |= MK_MESSAGE; 1597 } 1598 1599 if ((dev->flags & (AHD_DEV_Q_TAGGED|AHD_DEV_Q_BASIC)) != 0) { 1600 if (dev->commands_since_idle_or_otag == AHD_OTAG_THRESH 1601 && (dev->flags & AHD_DEV_Q_TAGGED) != 0) { 1602 hscb->control |= ORDERED_QUEUE_TAG; 1603 dev->commands_since_idle_or_otag = 0; 1604 } else { 1605 hscb->control |= SIMPLE_QUEUE_TAG; 1606 } 1607 } 1608 1609 hscb->cdb_len = cmd->cmd_len; 1610 memcpy(hscb->shared_data.idata.cdb, cmd->cmnd, hscb->cdb_len); 1611 1612 scb->platform_data->xfer_len = 0; 1613 ahd_set_residual(scb, 0); 1614 ahd_set_sense_residual(scb, 0); 1615 scb->sg_count = 0; 1616 1617 if (nseg > 0) { 1618 void *sg = scb->sg_list; 1619 struct scatterlist *cur_seg; 1620 int i; 1621 1622 scb->platform_data->xfer_len = 0; 1623 1624 scsi_for_each_sg(cmd, cur_seg, nseg, i) { 1625 dma_addr_t addr; 1626 bus_size_t len; 1627 1628 addr = sg_dma_address(cur_seg); 1629 len = sg_dma_len(cur_seg); 1630 scb->platform_data->xfer_len += len; 1631 sg = ahd_sg_setup(ahd, scb, sg, addr, len, 1632 i == (nseg - 1)); 1633 } 1634 } 1635 1636 LIST_INSERT_HEAD(&ahd->pending_scbs, scb, pending_links); 1637 dev->openings--; 1638 dev->active++; 1639 dev->commands_issued++; 1640 1641 if ((dev->flags & AHD_DEV_PERIODIC_OTAG) != 0) 1642 dev->commands_since_idle_or_otag++; 1643 scb->flags |= SCB_ACTIVE; 1644 ahd_queue_scb(ahd, scb); 1645 1646 ahd_unlock(ahd, &flags); 1647 1648 return 0; 1649 } 1650 1651 /* 1652 * SCSI controller interrupt handler. 1653 */ 1654 irqreturn_t 1655 ahd_linux_isr(int irq, void *dev_id) 1656 { 1657 struct ahd_softc *ahd; 1658 u_long flags; 1659 int ours; 1660 1661 ahd = (struct ahd_softc *) dev_id; 1662 ahd_lock(ahd, &flags); 1663 ours = ahd_intr(ahd); 1664 ahd_unlock(ahd, &flags); 1665 return IRQ_RETVAL(ours); 1666 } 1667 1668 void 1669 ahd_send_async(struct ahd_softc *ahd, char channel, 1670 u_int target, u_int lun, ac_code code) 1671 { 1672 switch (code) { 1673 case AC_TRANSFER_NEG: 1674 { 1675 struct scsi_target *starget; 1676 struct ahd_initiator_tinfo *tinfo; 1677 struct ahd_tmode_tstate *tstate; 1678 unsigned int target_ppr_options; 1679 1680 BUG_ON(target == CAM_TARGET_WILDCARD); 1681 1682 tinfo = ahd_fetch_transinfo(ahd, channel, ahd->our_id, 1683 target, &tstate); 1684 1685 /* 1686 * Don't bother reporting results while 1687 * negotiations are still pending. 1688 */ 1689 if (tinfo->curr.period != tinfo->goal.period 1690 || tinfo->curr.width != tinfo->goal.width 1691 || tinfo->curr.offset != tinfo->goal.offset 1692 || tinfo->curr.ppr_options != tinfo->goal.ppr_options) 1693 if (bootverbose == 0) 1694 break; 1695 1696 /* 1697 * Don't bother reporting results that 1698 * are identical to those last reported. 1699 */ 1700 starget = ahd->platform_data->starget[target]; 1701 if (starget == NULL) 1702 break; 1703 1704 target_ppr_options = 1705 (spi_dt(starget) ? MSG_EXT_PPR_DT_REQ : 0) 1706 + (spi_qas(starget) ? MSG_EXT_PPR_QAS_REQ : 0) 1707 + (spi_iu(starget) ? MSG_EXT_PPR_IU_REQ : 0) 1708 + (spi_rd_strm(starget) ? MSG_EXT_PPR_RD_STRM : 0) 1709 + (spi_pcomp_en(starget) ? MSG_EXT_PPR_PCOMP_EN : 0) 1710 + (spi_rti(starget) ? MSG_EXT_PPR_RTI : 0) 1711 + (spi_wr_flow(starget) ? MSG_EXT_PPR_WR_FLOW : 0) 1712 + (spi_hold_mcs(starget) ? MSG_EXT_PPR_HOLD_MCS : 0); 1713 1714 if (tinfo->curr.period == spi_period(starget) 1715 && tinfo->curr.width == spi_width(starget) 1716 && tinfo->curr.offset == spi_offset(starget) 1717 && tinfo->curr.ppr_options == target_ppr_options) 1718 if (bootverbose == 0) 1719 break; 1720 1721 spi_period(starget) = tinfo->curr.period; 1722 spi_width(starget) = tinfo->curr.width; 1723 spi_offset(starget) = tinfo->curr.offset; 1724 spi_dt(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_DT_REQ ? 1 : 0; 1725 spi_qas(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_QAS_REQ ? 1 : 0; 1726 spi_iu(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_IU_REQ ? 1 : 0; 1727 spi_rd_strm(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RD_STRM ? 1 : 0; 1728 spi_pcomp_en(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_PCOMP_EN ? 1 : 0; 1729 spi_rti(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_RTI ? 1 : 0; 1730 spi_wr_flow(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_WR_FLOW ? 1 : 0; 1731 spi_hold_mcs(starget) = tinfo->curr.ppr_options & MSG_EXT_PPR_HOLD_MCS ? 1 : 0; 1732 spi_display_xfer_agreement(starget); 1733 break; 1734 } 1735 case AC_SENT_BDR: 1736 { 1737 WARN_ON(lun != CAM_LUN_WILDCARD); 1738 scsi_report_device_reset(ahd->platform_data->host, 1739 channel - 'A', target); 1740 break; 1741 } 1742 case AC_BUS_RESET: 1743 if (ahd->platform_data->host != NULL) { 1744 scsi_report_bus_reset(ahd->platform_data->host, 1745 channel - 'A'); 1746 } 1747 break; 1748 default: 1749 panic("ahd_send_async: Unexpected async event"); 1750 } 1751 } 1752 1753 /* 1754 * Calls the higher level scsi done function and frees the scb. 1755 */ 1756 void 1757 ahd_done(struct ahd_softc *ahd, struct scb *scb) 1758 { 1759 struct scsi_cmnd *cmd; 1760 struct ahd_linux_device *dev; 1761 1762 if ((scb->flags & SCB_ACTIVE) == 0) { 1763 printk("SCB %d done'd twice\n", SCB_GET_TAG(scb)); 1764 ahd_dump_card_state(ahd); 1765 panic("Stopping for safety"); 1766 } 1767 LIST_REMOVE(scb, pending_links); 1768 cmd = scb->io_ctx; 1769 dev = scb->platform_data->dev; 1770 dev->active--; 1771 dev->openings++; 1772 if ((cmd->result & (CAM_DEV_QFRZN << 16)) != 0) { 1773 cmd->result &= ~(CAM_DEV_QFRZN << 16); 1774 dev->qfrozen--; 1775 } 1776 ahd_linux_unmap_scb(ahd, scb); 1777 1778 /* 1779 * Guard against stale sense data. 1780 * The Linux mid-layer assumes that sense 1781 * was retrieved anytime the first byte of 1782 * the sense buffer looks "sane". 1783 */ 1784 cmd->sense_buffer[0] = 0; 1785 if (ahd_get_transaction_status(scb) == CAM_REQ_INPROG) { 1786 #ifdef AHD_REPORT_UNDERFLOWS 1787 uint32_t amount_xferred; 1788 1789 amount_xferred = 1790 ahd_get_transfer_length(scb) - ahd_get_residual(scb); 1791 #endif 1792 if ((scb->flags & SCB_TRANSMISSION_ERROR) != 0) { 1793 #ifdef AHD_DEBUG 1794 if ((ahd_debug & AHD_SHOW_MISC) != 0) { 1795 ahd_print_path(ahd, scb); 1796 printk("Set CAM_UNCOR_PARITY\n"); 1797 } 1798 #endif 1799 ahd_set_transaction_status(scb, CAM_UNCOR_PARITY); 1800 #ifdef AHD_REPORT_UNDERFLOWS 1801 /* 1802 * This code is disabled by default as some 1803 * clients of the SCSI system do not properly 1804 * initialize the underflow parameter. This 1805 * results in spurious termination of commands 1806 * that complete as expected (e.g. underflow is 1807 * allowed as command can return variable amounts 1808 * of data. 1809 */ 1810 } else if (amount_xferred < scb->io_ctx->underflow) { 1811 u_int i; 1812 1813 ahd_print_path(ahd, scb); 1814 printk("CDB:"); 1815 for (i = 0; i < scb->io_ctx->cmd_len; i++) 1816 printk(" 0x%x", scb->io_ctx->cmnd[i]); 1817 printk("\n"); 1818 ahd_print_path(ahd, scb); 1819 printk("Saw underflow (%ld of %ld bytes). " 1820 "Treated as error\n", 1821 ahd_get_residual(scb), 1822 ahd_get_transfer_length(scb)); 1823 ahd_set_transaction_status(scb, CAM_DATA_RUN_ERR); 1824 #endif 1825 } else { 1826 ahd_set_transaction_status(scb, CAM_REQ_CMP); 1827 } 1828 } else if (ahd_get_transaction_status(scb) == CAM_SCSI_STATUS_ERROR) { 1829 ahd_linux_handle_scsi_status(ahd, cmd->device, scb); 1830 } 1831 1832 if (dev->openings == 1 1833 && ahd_get_transaction_status(scb) == CAM_REQ_CMP 1834 && ahd_get_scsi_status(scb) != SAM_STAT_TASK_SET_FULL) 1835 dev->tag_success_count++; 1836 /* 1837 * Some devices deal with temporary internal resource 1838 * shortages by returning queue full. When the queue 1839 * full occurrs, we throttle back. Slowly try to get 1840 * back to our previous queue depth. 1841 */ 1842 if ((dev->openings + dev->active) < dev->maxtags 1843 && dev->tag_success_count > AHD_TAG_SUCCESS_INTERVAL) { 1844 dev->tag_success_count = 0; 1845 dev->openings++; 1846 } 1847 1848 if (dev->active == 0) 1849 dev->commands_since_idle_or_otag = 0; 1850 1851 if ((scb->flags & SCB_RECOVERY_SCB) != 0) { 1852 printk("Recovery SCB completes\n"); 1853 if (ahd_get_transaction_status(scb) == CAM_BDR_SENT 1854 || ahd_get_transaction_status(scb) == CAM_REQ_ABORTED) 1855 ahd_set_transaction_status(scb, CAM_CMD_TIMEOUT); 1856 1857 if (ahd->platform_data->eh_done) 1858 complete(ahd->platform_data->eh_done); 1859 } 1860 1861 ahd_free_scb(ahd, scb); 1862 ahd_linux_queue_cmd_complete(ahd, cmd); 1863 } 1864 1865 static void 1866 ahd_linux_handle_scsi_status(struct ahd_softc *ahd, 1867 struct scsi_device *sdev, struct scb *scb) 1868 { 1869 struct ahd_devinfo devinfo; 1870 struct ahd_linux_device *dev = scsi_transport_device_data(sdev); 1871 1872 ahd_compile_devinfo(&devinfo, 1873 ahd->our_id, 1874 sdev->sdev_target->id, sdev->lun, 1875 sdev->sdev_target->channel == 0 ? 'A' : 'B', 1876 ROLE_INITIATOR); 1877 1878 /* 1879 * We don't currently trust the mid-layer to 1880 * properly deal with queue full or busy. So, 1881 * when one occurs, we tell the mid-layer to 1882 * unconditionally requeue the command to us 1883 * so that we can retry it ourselves. We also 1884 * implement our own throttling mechanism so 1885 * we don't clobber the device with too many 1886 * commands. 1887 */ 1888 switch (ahd_get_scsi_status(scb)) { 1889 default: 1890 break; 1891 case SAM_STAT_CHECK_CONDITION: 1892 case SAM_STAT_COMMAND_TERMINATED: 1893 { 1894 struct scsi_cmnd *cmd; 1895 1896 /* 1897 * Copy sense information to the OS's cmd 1898 * structure if it is available. 1899 */ 1900 cmd = scb->io_ctx; 1901 if ((scb->flags & (SCB_SENSE|SCB_PKT_SENSE)) != 0) { 1902 struct scsi_status_iu_header *siu; 1903 u_int sense_size; 1904 u_int sense_offset; 1905 1906 if (scb->flags & SCB_SENSE) { 1907 sense_size = min(sizeof(struct scsi_sense_data) 1908 - ahd_get_sense_residual(scb), 1909 (u_long)SCSI_SENSE_BUFFERSIZE); 1910 sense_offset = 0; 1911 } else { 1912 /* 1913 * Copy only the sense data into the provided 1914 * buffer. 1915 */ 1916 siu = (struct scsi_status_iu_header *) 1917 scb->sense_data; 1918 sense_size = min_t(size_t, 1919 scsi_4btoul(siu->sense_length), 1920 SCSI_SENSE_BUFFERSIZE); 1921 sense_offset = SIU_SENSE_OFFSET(siu); 1922 } 1923 1924 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1925 memcpy(cmd->sense_buffer, 1926 ahd_get_sense_buf(ahd, scb) 1927 + sense_offset, sense_size); 1928 set_status_byte(cmd, SAM_STAT_CHECK_CONDITION); 1929 1930 #ifdef AHD_DEBUG 1931 if (ahd_debug & AHD_SHOW_SENSE) { 1932 int i; 1933 1934 printk("Copied %d bytes of sense data at %d:", 1935 sense_size, sense_offset); 1936 for (i = 0; i < sense_size; i++) { 1937 if ((i & 0xF) == 0) 1938 printk("\n"); 1939 printk("0x%x ", cmd->sense_buffer[i]); 1940 } 1941 printk("\n"); 1942 } 1943 #endif 1944 } 1945 break; 1946 } 1947 case SAM_STAT_TASK_SET_FULL: 1948 /* 1949 * By the time the core driver has returned this 1950 * command, all other commands that were queued 1951 * to us but not the device have been returned. 1952 * This ensures that dev->active is equal to 1953 * the number of commands actually queued to 1954 * the device. 1955 */ 1956 dev->tag_success_count = 0; 1957 if (dev->active != 0) { 1958 /* 1959 * Drop our opening count to the number 1960 * of commands currently outstanding. 1961 */ 1962 dev->openings = 0; 1963 #ifdef AHD_DEBUG 1964 if ((ahd_debug & AHD_SHOW_QFULL) != 0) { 1965 ahd_print_path(ahd, scb); 1966 printk("Dropping tag count to %d\n", 1967 dev->active); 1968 } 1969 #endif 1970 if (dev->active == dev->tags_on_last_queuefull) { 1971 1972 dev->last_queuefull_same_count++; 1973 /* 1974 * If we repeatedly see a queue full 1975 * at the same queue depth, this 1976 * device has a fixed number of tag 1977 * slots. Lock in this tag depth 1978 * so we stop seeing queue fulls from 1979 * this device. 1980 */ 1981 if (dev->last_queuefull_same_count 1982 == AHD_LOCK_TAGS_COUNT) { 1983 dev->maxtags = dev->active; 1984 ahd_print_path(ahd, scb); 1985 printk("Locking max tag count at %d\n", 1986 dev->active); 1987 } 1988 } else { 1989 dev->tags_on_last_queuefull = dev->active; 1990 dev->last_queuefull_same_count = 0; 1991 } 1992 ahd_set_transaction_status(scb, CAM_REQUEUE_REQ); 1993 ahd_set_scsi_status(scb, SAM_STAT_GOOD); 1994 ahd_platform_set_tags(ahd, sdev, &devinfo, 1995 (dev->flags & AHD_DEV_Q_BASIC) 1996 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 1997 break; 1998 } 1999 /* 2000 * Drop down to a single opening, and treat this 2001 * as if the target returned BUSY SCSI status. 2002 */ 2003 dev->openings = 1; 2004 ahd_platform_set_tags(ahd, sdev, &devinfo, 2005 (dev->flags & AHD_DEV_Q_BASIC) 2006 ? AHD_QUEUE_BASIC : AHD_QUEUE_TAGGED); 2007 ahd_set_scsi_status(scb, SAM_STAT_BUSY); 2008 } 2009 } 2010 2011 static void 2012 ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd) 2013 { 2014 int status; 2015 int new_status = DID_OK; 2016 int do_fallback = 0; 2017 int scsi_status; 2018 struct scsi_sense_data *sense; 2019 2020 /* 2021 * Map CAM error codes into Linux Error codes. We 2022 * avoid the conversion so that the DV code has the 2023 * full error information available when making 2024 * state change decisions. 2025 */ 2026 2027 status = ahd_cmd_get_transaction_status(cmd); 2028 switch (status) { 2029 case CAM_REQ_INPROG: 2030 case CAM_REQ_CMP: 2031 new_status = DID_OK; 2032 break; 2033 case CAM_AUTOSENSE_FAIL: 2034 new_status = DID_ERROR; 2035 fallthrough; 2036 case CAM_SCSI_STATUS_ERROR: 2037 scsi_status = ahd_cmd_get_scsi_status(cmd); 2038 2039 switch(scsi_status) { 2040 case SAM_STAT_COMMAND_TERMINATED: 2041 case SAM_STAT_CHECK_CONDITION: 2042 sense = (struct scsi_sense_data *) 2043 cmd->sense_buffer; 2044 if (sense->extra_len >= 5 && 2045 (sense->add_sense_code == 0x47 2046 || sense->add_sense_code == 0x48)) 2047 do_fallback = 1; 2048 break; 2049 default: 2050 break; 2051 } 2052 break; 2053 case CAM_REQ_ABORTED: 2054 new_status = DID_ABORT; 2055 break; 2056 case CAM_BUSY: 2057 new_status = DID_BUS_BUSY; 2058 break; 2059 case CAM_REQ_INVALID: 2060 case CAM_PATH_INVALID: 2061 new_status = DID_BAD_TARGET; 2062 break; 2063 case CAM_SEL_TIMEOUT: 2064 new_status = DID_NO_CONNECT; 2065 break; 2066 case CAM_SCSI_BUS_RESET: 2067 case CAM_BDR_SENT: 2068 new_status = DID_RESET; 2069 break; 2070 case CAM_UNCOR_PARITY: 2071 new_status = DID_PARITY; 2072 do_fallback = 1; 2073 break; 2074 case CAM_CMD_TIMEOUT: 2075 new_status = DID_TIME_OUT; 2076 do_fallback = 1; 2077 break; 2078 case CAM_REQ_CMP_ERR: 2079 case CAM_UNEXP_BUSFREE: 2080 case CAM_DATA_RUN_ERR: 2081 new_status = DID_ERROR; 2082 do_fallback = 1; 2083 break; 2084 case CAM_UA_ABORT: 2085 case CAM_NO_HBA: 2086 case CAM_SEQUENCE_FAIL: 2087 case CAM_CCB_LEN_ERR: 2088 case CAM_PROVIDE_FAIL: 2089 case CAM_REQ_TERMIO: 2090 case CAM_UNREC_HBA_ERROR: 2091 case CAM_REQ_TOO_BIG: 2092 new_status = DID_ERROR; 2093 break; 2094 case CAM_REQUEUE_REQ: 2095 new_status = DID_REQUEUE; 2096 break; 2097 default: 2098 /* We should never get here */ 2099 new_status = DID_ERROR; 2100 break; 2101 } 2102 2103 if (do_fallback) { 2104 printk("%s: device overrun (status %x) on %d:%d:%d\n", 2105 ahd_name(ahd), status, cmd->device->channel, 2106 cmd->device->id, (u8)cmd->device->lun); 2107 } 2108 2109 ahd_cmd_set_transaction_status(cmd, new_status); 2110 2111 scsi_done(cmd); 2112 } 2113 2114 static void 2115 ahd_freeze_simq(struct ahd_softc *ahd) 2116 { 2117 scsi_block_requests(ahd->platform_data->host); 2118 } 2119 2120 static void 2121 ahd_release_simq(struct ahd_softc *ahd) 2122 { 2123 scsi_unblock_requests(ahd->platform_data->host); 2124 } 2125 2126 static int 2127 ahd_linux_queue_abort_cmd(struct scsi_cmnd *cmd) 2128 { 2129 struct ahd_softc *ahd; 2130 struct ahd_linux_device *dev; 2131 struct scb *pending_scb; 2132 u_int saved_scbptr; 2133 u_int active_scbptr; 2134 u_int last_phase; 2135 u_int cdb_byte; 2136 int retval = SUCCESS; 2137 int was_paused; 2138 int paused; 2139 int wait; 2140 int disconnected; 2141 ahd_mode_state saved_modes; 2142 unsigned long flags; 2143 2144 pending_scb = NULL; 2145 paused = FALSE; 2146 wait = FALSE; 2147 ahd = *(struct ahd_softc **)cmd->device->host->hostdata; 2148 2149 scmd_printk(KERN_INFO, cmd, 2150 "Attempting to queue an ABORT message:"); 2151 2152 printk("CDB:"); 2153 for (cdb_byte = 0; cdb_byte < cmd->cmd_len; cdb_byte++) 2154 printk(" 0x%x", cmd->cmnd[cdb_byte]); 2155 printk("\n"); 2156 2157 ahd_lock(ahd, &flags); 2158 2159 /* 2160 * First determine if we currently own this command. 2161 * Start by searching the device queue. If not found 2162 * there, check the pending_scb list. If not found 2163 * at all, and the system wanted us to just abort the 2164 * command, return success. 2165 */ 2166 dev = scsi_transport_device_data(cmd->device); 2167 2168 if (dev == NULL) { 2169 /* 2170 * No target device for this command exists, 2171 * so we must not still own the command. 2172 */ 2173 scmd_printk(KERN_INFO, cmd, "Is not an active device\n"); 2174 goto done; 2175 } 2176 2177 /* 2178 * See if we can find a matching cmd in the pending list. 2179 */ 2180 LIST_FOREACH(pending_scb, &ahd->pending_scbs, pending_links) { 2181 if (pending_scb->io_ctx == cmd) 2182 break; 2183 } 2184 2185 if (pending_scb == NULL) { 2186 scmd_printk(KERN_INFO, cmd, "Command not found\n"); 2187 goto done; 2188 } 2189 2190 if ((pending_scb->flags & SCB_RECOVERY_SCB) != 0) { 2191 /* 2192 * We can't queue two recovery actions using the same SCB 2193 */ 2194 retval = FAILED; 2195 goto done; 2196 } 2197 2198 /* 2199 * Ensure that the card doesn't do anything 2200 * behind our back. Also make sure that we 2201 * didn't "just" miss an interrupt that would 2202 * affect this cmd. 2203 */ 2204 was_paused = ahd_is_paused(ahd); 2205 ahd_pause_and_flushwork(ahd); 2206 paused = TRUE; 2207 2208 if ((pending_scb->flags & SCB_ACTIVE) == 0) { 2209 scmd_printk(KERN_INFO, cmd, "Command already completed\n"); 2210 goto done; 2211 } 2212 2213 printk("%s: At time of recovery, card was %spaused\n", 2214 ahd_name(ahd), was_paused ? "" : "not "); 2215 ahd_dump_card_state(ahd); 2216 2217 disconnected = TRUE; 2218 if (ahd_search_qinfifo(ahd, cmd->device->id, 2219 cmd->device->channel + 'A', 2220 cmd->device->lun, 2221 pending_scb->hscb->tag, 2222 ROLE_INITIATOR, CAM_REQ_ABORTED, 2223 SEARCH_COMPLETE) > 0) { 2224 printk("%s:%d:%d:%d: Cmd aborted from QINFIFO\n", 2225 ahd_name(ahd), cmd->device->channel, 2226 cmd->device->id, (u8)cmd->device->lun); 2227 goto done; 2228 } 2229 2230 saved_modes = ahd_save_modes(ahd); 2231 ahd_set_modes(ahd, AHD_MODE_SCSI, AHD_MODE_SCSI); 2232 last_phase = ahd_inb(ahd, LASTPHASE); 2233 saved_scbptr = ahd_get_scbptr(ahd); 2234 active_scbptr = saved_scbptr; 2235 if (disconnected && (ahd_inb(ahd, SEQ_FLAGS) & NOT_IDENTIFIED) == 0) { 2236 struct scb *bus_scb; 2237 2238 bus_scb = ahd_lookup_scb(ahd, active_scbptr); 2239 if (bus_scb == pending_scb) 2240 disconnected = FALSE; 2241 } 2242 2243 /* 2244 * At this point, pending_scb is the scb associated with the 2245 * passed in command. That command is currently active on the 2246 * bus or is in the disconnected state. 2247 */ 2248 ahd_inb(ahd, SAVED_SCSIID); 2249 if (last_phase != P_BUSFREE 2250 && SCB_GET_TAG(pending_scb) == active_scbptr) { 2251 2252 /* 2253 * We're active on the bus, so assert ATN 2254 * and hope that the target responds. 2255 */ 2256 pending_scb = ahd_lookup_scb(ahd, active_scbptr); 2257 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2258 ahd_outb(ahd, MSG_OUT, HOST_MSG); 2259 ahd_outb(ahd, SCSISIGO, last_phase|ATNO); 2260 scmd_printk(KERN_INFO, cmd, "Device is active, asserting ATN\n"); 2261 wait = TRUE; 2262 } else if (disconnected) { 2263 2264 /* 2265 * Actually re-queue this SCB in an attempt 2266 * to select the device before it reconnects. 2267 */ 2268 pending_scb->flags |= SCB_RECOVERY_SCB|SCB_ABORT; 2269 ahd_set_scbptr(ahd, SCB_GET_TAG(pending_scb)); 2270 pending_scb->hscb->cdb_len = 0; 2271 pending_scb->hscb->task_attribute = 0; 2272 pending_scb->hscb->task_management = SIU_TASKMGMT_ABORT_TASK; 2273 2274 if ((pending_scb->flags & SCB_PACKETIZED) != 0) { 2275 /* 2276 * Mark the SCB has having an outstanding 2277 * task management function. Should the command 2278 * complete normally before the task management 2279 * function can be sent, the host will be notified 2280 * to abort our requeued SCB. 2281 */ 2282 ahd_outb(ahd, SCB_TASK_MANAGEMENT, 2283 pending_scb->hscb->task_management); 2284 } else { 2285 /* 2286 * If non-packetized, set the MK_MESSAGE control 2287 * bit indicating that we desire to send a message. 2288 * We also set the disconnected flag since there is 2289 * no guarantee that our SCB control byte matches 2290 * the version on the card. We don't want the 2291 * sequencer to abort the command thinking an 2292 * unsolicited reselection occurred. 2293 */ 2294 pending_scb->hscb->control |= MK_MESSAGE|DISCONNECTED; 2295 2296 /* 2297 * The sequencer will never re-reference the 2298 * in-core SCB. To make sure we are notified 2299 * during reselection, set the MK_MESSAGE flag in 2300 * the card's copy of the SCB. 2301 */ 2302 ahd_outb(ahd, SCB_CONTROL, 2303 ahd_inb(ahd, SCB_CONTROL)|MK_MESSAGE); 2304 } 2305 2306 /* 2307 * Clear out any entries in the QINFIFO first 2308 * so we are the next SCB for this target 2309 * to run. 2310 */ 2311 ahd_search_qinfifo(ahd, cmd->device->id, 2312 cmd->device->channel + 'A', cmd->device->lun, 2313 SCB_LIST_NULL, ROLE_INITIATOR, 2314 CAM_REQUEUE_REQ, SEARCH_COMPLETE); 2315 ahd_qinfifo_requeue_tail(ahd, pending_scb); 2316 ahd_set_scbptr(ahd, saved_scbptr); 2317 ahd_print_path(ahd, pending_scb); 2318 printk("Device is disconnected, re-queuing SCB\n"); 2319 wait = TRUE; 2320 } else { 2321 scmd_printk(KERN_INFO, cmd, "Unable to deliver message\n"); 2322 retval = FAILED; 2323 } 2324 2325 2326 ahd_restore_modes(ahd, saved_modes); 2327 done: 2328 if (paused) 2329 ahd_unpause(ahd); 2330 if (wait) { 2331 DECLARE_COMPLETION_ONSTACK(done); 2332 2333 ahd->platform_data->eh_done = &done; 2334 ahd_unlock(ahd, &flags); 2335 2336 printk("%s: Recovery code sleeping\n", ahd_name(ahd)); 2337 if (!wait_for_completion_timeout(&done, 5 * HZ)) { 2338 ahd_lock(ahd, &flags); 2339 ahd->platform_data->eh_done = NULL; 2340 ahd_unlock(ahd, &flags); 2341 printk("%s: Timer Expired (active %d)\n", 2342 ahd_name(ahd), dev->active); 2343 retval = FAILED; 2344 } 2345 printk("Recovery code awake\n"); 2346 } else 2347 ahd_unlock(ahd, &flags); 2348 2349 if (retval != SUCCESS) 2350 printk("%s: Command abort returning 0x%x\n", 2351 ahd_name(ahd), retval); 2352 2353 return retval; 2354 } 2355 2356 static void ahd_linux_set_width(struct scsi_target *starget, int width) 2357 { 2358 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2359 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2360 struct ahd_devinfo devinfo; 2361 unsigned long flags; 2362 2363 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2364 starget->channel + 'A', ROLE_INITIATOR); 2365 ahd_lock(ahd, &flags); 2366 ahd_set_width(ahd, &devinfo, width, AHD_TRANS_GOAL, FALSE); 2367 ahd_unlock(ahd, &flags); 2368 } 2369 2370 static void ahd_linux_set_period(struct scsi_target *starget, int period) 2371 { 2372 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2373 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2374 struct ahd_tmode_tstate *tstate; 2375 struct ahd_initiator_tinfo *tinfo 2376 = ahd_fetch_transinfo(ahd, 2377 starget->channel + 'A', 2378 shost->this_id, starget->id, &tstate); 2379 struct ahd_devinfo devinfo; 2380 unsigned int ppr_options = tinfo->goal.ppr_options; 2381 unsigned int dt; 2382 unsigned long flags; 2383 unsigned long offset = tinfo->goal.offset; 2384 2385 #ifdef AHD_DEBUG 2386 if ((ahd_debug & AHD_SHOW_DV) != 0) 2387 printk("%s: set period to %d\n", ahd_name(ahd), period); 2388 #endif 2389 if (offset == 0) 2390 offset = MAX_OFFSET; 2391 2392 if (period < 8) 2393 period = 8; 2394 if (period < 10) { 2395 if (spi_max_width(starget)) { 2396 ppr_options |= MSG_EXT_PPR_DT_REQ; 2397 if (period == 8) 2398 ppr_options |= MSG_EXT_PPR_IU_REQ; 2399 } else 2400 period = 10; 2401 } 2402 2403 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2404 2405 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2406 starget->channel + 'A', ROLE_INITIATOR); 2407 2408 /* all PPR requests apart from QAS require wide transfers */ 2409 if (ppr_options & ~MSG_EXT_PPR_QAS_REQ) { 2410 if (spi_width(starget) == 0) 2411 ppr_options &= MSG_EXT_PPR_QAS_REQ; 2412 } 2413 2414 ahd_find_syncrate(ahd, &period, &ppr_options, 2415 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2416 2417 ahd_lock(ahd, &flags); 2418 ahd_set_syncrate(ahd, &devinfo, period, offset, 2419 ppr_options, AHD_TRANS_GOAL, FALSE); 2420 ahd_unlock(ahd, &flags); 2421 } 2422 2423 static void ahd_linux_set_offset(struct scsi_target *starget, int offset) 2424 { 2425 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2426 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2427 struct ahd_tmode_tstate *tstate; 2428 struct ahd_initiator_tinfo *tinfo 2429 = ahd_fetch_transinfo(ahd, 2430 starget->channel + 'A', 2431 shost->this_id, starget->id, &tstate); 2432 struct ahd_devinfo devinfo; 2433 unsigned int ppr_options = 0; 2434 unsigned int period = 0; 2435 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2436 unsigned long flags; 2437 2438 #ifdef AHD_DEBUG 2439 if ((ahd_debug & AHD_SHOW_DV) != 0) 2440 printk("%s: set offset to %d\n", ahd_name(ahd), offset); 2441 #endif 2442 2443 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2444 starget->channel + 'A', ROLE_INITIATOR); 2445 if (offset != 0) { 2446 period = tinfo->goal.period; 2447 ppr_options = tinfo->goal.ppr_options; 2448 ahd_find_syncrate(ahd, &period, &ppr_options, 2449 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2450 } 2451 2452 ahd_lock(ahd, &flags); 2453 ahd_set_syncrate(ahd, &devinfo, period, offset, ppr_options, 2454 AHD_TRANS_GOAL, FALSE); 2455 ahd_unlock(ahd, &flags); 2456 } 2457 2458 static void ahd_linux_set_dt(struct scsi_target *starget, int dt) 2459 { 2460 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2461 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2462 struct ahd_tmode_tstate *tstate; 2463 struct ahd_initiator_tinfo *tinfo 2464 = ahd_fetch_transinfo(ahd, 2465 starget->channel + 'A', 2466 shost->this_id, starget->id, &tstate); 2467 struct ahd_devinfo devinfo; 2468 unsigned int ppr_options = tinfo->goal.ppr_options 2469 & ~MSG_EXT_PPR_DT_REQ; 2470 unsigned int period = tinfo->goal.period; 2471 unsigned int width = tinfo->goal.width; 2472 unsigned long flags; 2473 2474 #ifdef AHD_DEBUG 2475 if ((ahd_debug & AHD_SHOW_DV) != 0) 2476 printk("%s: %s DT\n", ahd_name(ahd), 2477 dt ? "enabling" : "disabling"); 2478 #endif 2479 if (dt && spi_max_width(starget)) { 2480 ppr_options |= MSG_EXT_PPR_DT_REQ; 2481 if (!width) 2482 ahd_linux_set_width(starget, 1); 2483 } else { 2484 if (period <= 9) 2485 period = 10; /* If resetting DT, period must be >= 25ns */ 2486 /* IU is invalid without DT set */ 2487 ppr_options &= ~MSG_EXT_PPR_IU_REQ; 2488 } 2489 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2490 starget->channel + 'A', ROLE_INITIATOR); 2491 ahd_find_syncrate(ahd, &period, &ppr_options, 2492 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2493 2494 ahd_lock(ahd, &flags); 2495 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2496 ppr_options, AHD_TRANS_GOAL, FALSE); 2497 ahd_unlock(ahd, &flags); 2498 } 2499 2500 static void ahd_linux_set_qas(struct scsi_target *starget, int qas) 2501 { 2502 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2503 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2504 struct ahd_tmode_tstate *tstate; 2505 struct ahd_initiator_tinfo *tinfo 2506 = ahd_fetch_transinfo(ahd, 2507 starget->channel + 'A', 2508 shost->this_id, starget->id, &tstate); 2509 struct ahd_devinfo devinfo; 2510 unsigned int ppr_options = tinfo->goal.ppr_options 2511 & ~MSG_EXT_PPR_QAS_REQ; 2512 unsigned int period = tinfo->goal.period; 2513 unsigned int dt; 2514 unsigned long flags; 2515 2516 #ifdef AHD_DEBUG 2517 if ((ahd_debug & AHD_SHOW_DV) != 0) 2518 printk("%s: %s QAS\n", ahd_name(ahd), 2519 qas ? "enabling" : "disabling"); 2520 #endif 2521 2522 if (qas) { 2523 ppr_options |= MSG_EXT_PPR_QAS_REQ; 2524 } 2525 2526 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2527 2528 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2529 starget->channel + 'A', ROLE_INITIATOR); 2530 ahd_find_syncrate(ahd, &period, &ppr_options, 2531 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2532 2533 ahd_lock(ahd, &flags); 2534 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2535 ppr_options, AHD_TRANS_GOAL, FALSE); 2536 ahd_unlock(ahd, &flags); 2537 } 2538 2539 static void ahd_linux_set_iu(struct scsi_target *starget, int iu) 2540 { 2541 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2542 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2543 struct ahd_tmode_tstate *tstate; 2544 struct ahd_initiator_tinfo *tinfo 2545 = ahd_fetch_transinfo(ahd, 2546 starget->channel + 'A', 2547 shost->this_id, starget->id, &tstate); 2548 struct ahd_devinfo devinfo; 2549 unsigned int ppr_options = tinfo->goal.ppr_options 2550 & ~MSG_EXT_PPR_IU_REQ; 2551 unsigned int period = tinfo->goal.period; 2552 unsigned int dt; 2553 unsigned long flags; 2554 2555 #ifdef AHD_DEBUG 2556 if ((ahd_debug & AHD_SHOW_DV) != 0) 2557 printk("%s: %s IU\n", ahd_name(ahd), 2558 iu ? "enabling" : "disabling"); 2559 #endif 2560 2561 if (iu && spi_max_width(starget)) { 2562 ppr_options |= MSG_EXT_PPR_IU_REQ; 2563 ppr_options |= MSG_EXT_PPR_DT_REQ; /* IU requires DT */ 2564 } 2565 2566 dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2567 2568 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2569 starget->channel + 'A', ROLE_INITIATOR); 2570 ahd_find_syncrate(ahd, &period, &ppr_options, 2571 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2572 2573 ahd_lock(ahd, &flags); 2574 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2575 ppr_options, AHD_TRANS_GOAL, FALSE); 2576 ahd_unlock(ahd, &flags); 2577 } 2578 2579 static void ahd_linux_set_rd_strm(struct scsi_target *starget, int rdstrm) 2580 { 2581 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2582 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2583 struct ahd_tmode_tstate *tstate; 2584 struct ahd_initiator_tinfo *tinfo 2585 = ahd_fetch_transinfo(ahd, 2586 starget->channel + 'A', 2587 shost->this_id, starget->id, &tstate); 2588 struct ahd_devinfo devinfo; 2589 unsigned int ppr_options = tinfo->goal.ppr_options 2590 & ~MSG_EXT_PPR_RD_STRM; 2591 unsigned int period = tinfo->goal.period; 2592 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2593 unsigned long flags; 2594 2595 #ifdef AHD_DEBUG 2596 if ((ahd_debug & AHD_SHOW_DV) != 0) 2597 printk("%s: %s Read Streaming\n", ahd_name(ahd), 2598 rdstrm ? "enabling" : "disabling"); 2599 #endif 2600 2601 if (rdstrm && spi_max_width(starget)) 2602 ppr_options |= MSG_EXT_PPR_RD_STRM; 2603 2604 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2605 starget->channel + 'A', ROLE_INITIATOR); 2606 ahd_find_syncrate(ahd, &period, &ppr_options, 2607 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2608 2609 ahd_lock(ahd, &flags); 2610 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2611 ppr_options, AHD_TRANS_GOAL, FALSE); 2612 ahd_unlock(ahd, &flags); 2613 } 2614 2615 static void ahd_linux_set_wr_flow(struct scsi_target *starget, int wrflow) 2616 { 2617 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2618 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2619 struct ahd_tmode_tstate *tstate; 2620 struct ahd_initiator_tinfo *tinfo 2621 = ahd_fetch_transinfo(ahd, 2622 starget->channel + 'A', 2623 shost->this_id, starget->id, &tstate); 2624 struct ahd_devinfo devinfo; 2625 unsigned int ppr_options = tinfo->goal.ppr_options 2626 & ~MSG_EXT_PPR_WR_FLOW; 2627 unsigned int period = tinfo->goal.period; 2628 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2629 unsigned long flags; 2630 2631 #ifdef AHD_DEBUG 2632 if ((ahd_debug & AHD_SHOW_DV) != 0) 2633 printk("%s: %s Write Flow Control\n", ahd_name(ahd), 2634 wrflow ? "enabling" : "disabling"); 2635 #endif 2636 2637 if (wrflow && spi_max_width(starget)) 2638 ppr_options |= MSG_EXT_PPR_WR_FLOW; 2639 2640 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2641 starget->channel + 'A', ROLE_INITIATOR); 2642 ahd_find_syncrate(ahd, &period, &ppr_options, 2643 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2644 2645 ahd_lock(ahd, &flags); 2646 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2647 ppr_options, AHD_TRANS_GOAL, FALSE); 2648 ahd_unlock(ahd, &flags); 2649 } 2650 2651 static void ahd_linux_set_rti(struct scsi_target *starget, int rti) 2652 { 2653 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2654 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2655 struct ahd_tmode_tstate *tstate; 2656 struct ahd_initiator_tinfo *tinfo 2657 = ahd_fetch_transinfo(ahd, 2658 starget->channel + 'A', 2659 shost->this_id, starget->id, &tstate); 2660 struct ahd_devinfo devinfo; 2661 unsigned int ppr_options = tinfo->goal.ppr_options 2662 & ~MSG_EXT_PPR_RTI; 2663 unsigned int period = tinfo->goal.period; 2664 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2665 unsigned long flags; 2666 2667 if ((ahd->features & AHD_RTI) == 0) { 2668 #ifdef AHD_DEBUG 2669 if ((ahd_debug & AHD_SHOW_DV) != 0) 2670 printk("%s: RTI not available\n", ahd_name(ahd)); 2671 #endif 2672 return; 2673 } 2674 2675 #ifdef AHD_DEBUG 2676 if ((ahd_debug & AHD_SHOW_DV) != 0) 2677 printk("%s: %s RTI\n", ahd_name(ahd), 2678 rti ? "enabling" : "disabling"); 2679 #endif 2680 2681 if (rti && spi_max_width(starget)) 2682 ppr_options |= MSG_EXT_PPR_RTI; 2683 2684 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2685 starget->channel + 'A', ROLE_INITIATOR); 2686 ahd_find_syncrate(ahd, &period, &ppr_options, 2687 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2688 2689 ahd_lock(ahd, &flags); 2690 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2691 ppr_options, AHD_TRANS_GOAL, FALSE); 2692 ahd_unlock(ahd, &flags); 2693 } 2694 2695 static void ahd_linux_set_pcomp_en(struct scsi_target *starget, int pcomp) 2696 { 2697 struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); 2698 struct ahd_softc *ahd = *((struct ahd_softc **)shost->hostdata); 2699 struct ahd_tmode_tstate *tstate; 2700 struct ahd_initiator_tinfo *tinfo 2701 = ahd_fetch_transinfo(ahd, 2702 starget->channel + 'A', 2703 shost->this_id, starget->id, &tstate); 2704 struct ahd_devinfo devinfo; 2705 unsigned int ppr_options = tinfo->goal.ppr_options 2706 & ~MSG_EXT_PPR_PCOMP_EN; 2707 unsigned int period = tinfo->goal.period; 2708 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2709 unsigned long flags; 2710 2711 #ifdef AHD_DEBUG 2712 if ((ahd_debug & AHD_SHOW_DV) != 0) 2713 printk("%s: %s Precompensation\n", ahd_name(ahd), 2714 pcomp ? "Enable" : "Disable"); 2715 #endif 2716 2717 if (pcomp && spi_max_width(starget)) { 2718 uint8_t precomp; 2719 2720 if (ahd->unit < ARRAY_SIZE(aic79xx_iocell_info)) { 2721 const struct ahd_linux_iocell_opts *iocell_opts; 2722 2723 iocell_opts = &aic79xx_iocell_info[ahd->unit]; 2724 precomp = iocell_opts->precomp; 2725 } else { 2726 precomp = AIC79XX_DEFAULT_PRECOMP; 2727 } 2728 ppr_options |= MSG_EXT_PPR_PCOMP_EN; 2729 AHD_SET_PRECOMP(ahd, precomp); 2730 } else { 2731 AHD_SET_PRECOMP(ahd, 0); 2732 } 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_hold_mcs(struct scsi_target *starget, int hold) 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_HOLD_MCS; 2757 unsigned int period = tinfo->goal.period; 2758 unsigned int dt = ppr_options & MSG_EXT_PPR_DT_REQ; 2759 unsigned long flags; 2760 2761 if (hold && spi_max_width(starget)) 2762 ppr_options |= MSG_EXT_PPR_HOLD_MCS; 2763 2764 ahd_compile_devinfo(&devinfo, shost->this_id, starget->id, 0, 2765 starget->channel + 'A', ROLE_INITIATOR); 2766 ahd_find_syncrate(ahd, &period, &ppr_options, 2767 dt ? AHD_SYNCRATE_MAX : AHD_SYNCRATE_ULTRA2); 2768 2769 ahd_lock(ahd, &flags); 2770 ahd_set_syncrate(ahd, &devinfo, period, tinfo->goal.offset, 2771 ppr_options, AHD_TRANS_GOAL, FALSE); 2772 ahd_unlock(ahd, &flags); 2773 } 2774 2775 static void ahd_linux_get_signalling(struct Scsi_Host *shost) 2776 { 2777 struct ahd_softc *ahd = *(struct ahd_softc **)shost->hostdata; 2778 unsigned long flags; 2779 u8 mode; 2780 2781 ahd_lock(ahd, &flags); 2782 ahd_pause(ahd); 2783 mode = ahd_inb(ahd, SBLKCTL); 2784 ahd_unpause(ahd); 2785 ahd_unlock(ahd, &flags); 2786 2787 if (mode & ENAB40) 2788 spi_signalling(shost) = SPI_SIGNAL_LVD; 2789 else if (mode & ENAB20) 2790 spi_signalling(shost) = SPI_SIGNAL_SE; 2791 else 2792 spi_signalling(shost) = SPI_SIGNAL_UNKNOWN; 2793 } 2794 2795 static struct spi_function_template ahd_linux_transport_functions = { 2796 .set_offset = ahd_linux_set_offset, 2797 .show_offset = 1, 2798 .set_period = ahd_linux_set_period, 2799 .show_period = 1, 2800 .set_width = ahd_linux_set_width, 2801 .show_width = 1, 2802 .set_dt = ahd_linux_set_dt, 2803 .show_dt = 1, 2804 .set_iu = ahd_linux_set_iu, 2805 .show_iu = 1, 2806 .set_qas = ahd_linux_set_qas, 2807 .show_qas = 1, 2808 .set_rd_strm = ahd_linux_set_rd_strm, 2809 .show_rd_strm = 1, 2810 .set_wr_flow = ahd_linux_set_wr_flow, 2811 .show_wr_flow = 1, 2812 .set_rti = ahd_linux_set_rti, 2813 .show_rti = 1, 2814 .set_pcomp_en = ahd_linux_set_pcomp_en, 2815 .show_pcomp_en = 1, 2816 .set_hold_mcs = ahd_linux_set_hold_mcs, 2817 .show_hold_mcs = 1, 2818 .get_signalling = ahd_linux_get_signalling, 2819 }; 2820 2821 static int __init 2822 ahd_linux_init(void) 2823 { 2824 int error = 0; 2825 2826 /* 2827 * If we've been passed any parameters, process them now. 2828 */ 2829 if (aic79xx) 2830 aic79xx_setup(aic79xx); 2831 2832 ahd_linux_transport_template = 2833 spi_attach_transport(&ahd_linux_transport_functions); 2834 if (!ahd_linux_transport_template) 2835 return -ENODEV; 2836 2837 scsi_transport_reserve_device(ahd_linux_transport_template, 2838 sizeof(struct ahd_linux_device)); 2839 2840 error = ahd_linux_pci_init(); 2841 if (error) 2842 spi_release_transport(ahd_linux_transport_template); 2843 return error; 2844 } 2845 2846 static void __exit 2847 ahd_linux_exit(void) 2848 { 2849 ahd_linux_pci_exit(); 2850 spi_release_transport(ahd_linux_transport_template); 2851 } 2852 2853 module_init(ahd_linux_init); 2854 module_exit(ahd_linux_exit); 2855