1 /* 2 * Adaptec AIC7xxx device driver for Linux. 3 * 4 * Copyright (c) 1994 John Aycock 5 * The University of Calgary Department of Computer Science. 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2, or (at your option) 10 * any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; see the file COPYING. If not, write to 19 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 20 * 21 * Copyright (c) 2000-2003 Adaptec Inc. 22 * All rights reserved. 23 * 24 * Redistribution and use in source and binary forms, with or without 25 * modification, are permitted provided that the following conditions 26 * are met: 27 * 1. Redistributions of source code must retain the above copyright 28 * notice, this list of conditions, and the following disclaimer, 29 * without modification. 30 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 31 * substantially similar to the "NO WARRANTY" disclaimer below 32 * ("Disclaimer") and any redistribution must be conditioned upon 33 * including a substantially similar Disclaimer requirement for further 34 * binary redistribution. 35 * 3. Neither the names of the above-listed copyright holders nor the names 36 * of any contributors may be used to endorse or promote products derived 37 * from this software without specific prior written permission. 38 * 39 * Alternatively, this software may be distributed under the terms of the 40 * GNU General Public License ("GPL") version 2 as published by the Free 41 * Software Foundation. 42 * 43 * NO WARRANTY 44 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 45 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 46 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 47 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 48 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 50 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 51 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 52 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 53 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 54 * POSSIBILITY OF SUCH DAMAGES. 55 * 56 * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm.h#151 $ 57 * 58 */ 59 #ifndef _AIC7XXX_LINUX_H_ 60 #define _AIC7XXX_LINUX_H_ 61 62 #include <linux/types.h> 63 #include <linux/blkdev.h> 64 #include <linux/delay.h> 65 #include <linux/ioport.h> 66 #include <linux/pci.h> 67 #include <linux/smp_lock.h> 68 #include <linux/version.h> 69 #include <linux/module.h> 70 #include <asm/byteorder.h> 71 #include <asm/io.h> 72 73 #include <linux/interrupt.h> /* For tasklet support. */ 74 #include <linux/config.h> 75 #include <linux/slab.h> 76 77 /* Core SCSI definitions */ 78 #define AIC_LIB_PREFIX ahc 79 #include "scsi.h" 80 #include <scsi/scsi_host.h> 81 82 /* Name space conflict with BSD queue macros */ 83 #ifdef LIST_HEAD 84 #undef LIST_HEAD 85 #endif 86 87 #include "cam.h" 88 #include "queue.h" 89 #include "scsi_message.h" 90 #include "aiclib.h" 91 92 /*********************************** Debugging ********************************/ 93 #ifdef CONFIG_AIC7XXX_DEBUG_ENABLE 94 #ifdef CONFIG_AIC7XXX_DEBUG_MASK 95 #define AHC_DEBUG 1 96 #define AHC_DEBUG_OPTS CONFIG_AIC7XXX_DEBUG_MASK 97 #else 98 /* 99 * Compile in debugging code, but do not enable any printfs. 100 */ 101 #define AHC_DEBUG 1 102 #endif 103 /* No debugging code. */ 104 #endif 105 106 /************************* Forward Declarations *******************************/ 107 struct ahc_softc; 108 typedef struct pci_dev *ahc_dev_softc_t; 109 typedef Scsi_Cmnd *ahc_io_ctx_t; 110 111 /******************************* Byte Order ***********************************/ 112 #define ahc_htobe16(x) cpu_to_be16(x) 113 #define ahc_htobe32(x) cpu_to_be32(x) 114 #define ahc_htobe64(x) cpu_to_be64(x) 115 #define ahc_htole16(x) cpu_to_le16(x) 116 #define ahc_htole32(x) cpu_to_le32(x) 117 #define ahc_htole64(x) cpu_to_le64(x) 118 119 #define ahc_be16toh(x) be16_to_cpu(x) 120 #define ahc_be32toh(x) be32_to_cpu(x) 121 #define ahc_be64toh(x) be64_to_cpu(x) 122 #define ahc_le16toh(x) le16_to_cpu(x) 123 #define ahc_le32toh(x) le32_to_cpu(x) 124 #define ahc_le64toh(x) le64_to_cpu(x) 125 126 #ifndef LITTLE_ENDIAN 127 #define LITTLE_ENDIAN 1234 128 #endif 129 130 #ifndef BIG_ENDIAN 131 #define BIG_ENDIAN 4321 132 #endif 133 134 #ifndef BYTE_ORDER 135 #if defined(__BIG_ENDIAN) 136 #define BYTE_ORDER BIG_ENDIAN 137 #endif 138 #if defined(__LITTLE_ENDIAN) 139 #define BYTE_ORDER LITTLE_ENDIAN 140 #endif 141 #endif /* BYTE_ORDER */ 142 143 /************************* Configuration Data *********************************/ 144 extern u_int aic7xxx_no_probe; 145 extern u_int aic7xxx_allow_memio; 146 extern int aic7xxx_detect_complete; 147 extern Scsi_Host_Template aic7xxx_driver_template; 148 149 /***************************** Bus Space/DMA **********************************/ 150 151 typedef uint32_t bus_size_t; 152 153 typedef enum { 154 BUS_SPACE_MEMIO, 155 BUS_SPACE_PIO 156 } bus_space_tag_t; 157 158 typedef union { 159 u_long ioport; 160 volatile uint8_t __iomem *maddr; 161 } bus_space_handle_t; 162 163 typedef struct bus_dma_segment 164 { 165 dma_addr_t ds_addr; 166 bus_size_t ds_len; 167 } bus_dma_segment_t; 168 169 struct ahc_linux_dma_tag 170 { 171 bus_size_t alignment; 172 bus_size_t boundary; 173 bus_size_t maxsize; 174 }; 175 typedef struct ahc_linux_dma_tag* bus_dma_tag_t; 176 177 struct ahc_linux_dmamap 178 { 179 dma_addr_t bus_addr; 180 }; 181 typedef struct ahc_linux_dmamap* bus_dmamap_t; 182 183 typedef int bus_dma_filter_t(void*, dma_addr_t); 184 typedef void bus_dmamap_callback_t(void *, bus_dma_segment_t *, int, int); 185 186 #define BUS_DMA_WAITOK 0x0 187 #define BUS_DMA_NOWAIT 0x1 188 #define BUS_DMA_ALLOCNOW 0x2 189 #define BUS_DMA_LOAD_SEGS 0x4 /* 190 * Argument is an S/G list not 191 * a single buffer. 192 */ 193 194 #define BUS_SPACE_MAXADDR 0xFFFFFFFF 195 #define BUS_SPACE_MAXADDR_32BIT 0xFFFFFFFF 196 #define BUS_SPACE_MAXSIZE_32BIT 0xFFFFFFFF 197 198 int ahc_dma_tag_create(struct ahc_softc *, bus_dma_tag_t /*parent*/, 199 bus_size_t /*alignment*/, bus_size_t /*boundary*/, 200 dma_addr_t /*lowaddr*/, dma_addr_t /*highaddr*/, 201 bus_dma_filter_t*/*filter*/, void */*filterarg*/, 202 bus_size_t /*maxsize*/, int /*nsegments*/, 203 bus_size_t /*maxsegsz*/, int /*flags*/, 204 bus_dma_tag_t */*dma_tagp*/); 205 206 void ahc_dma_tag_destroy(struct ahc_softc *, bus_dma_tag_t /*tag*/); 207 208 int ahc_dmamem_alloc(struct ahc_softc *, bus_dma_tag_t /*dmat*/, 209 void** /*vaddr*/, int /*flags*/, 210 bus_dmamap_t* /*mapp*/); 211 212 void ahc_dmamem_free(struct ahc_softc *, bus_dma_tag_t /*dmat*/, 213 void* /*vaddr*/, bus_dmamap_t /*map*/); 214 215 void ahc_dmamap_destroy(struct ahc_softc *, bus_dma_tag_t /*tag*/, 216 bus_dmamap_t /*map*/); 217 218 int ahc_dmamap_load(struct ahc_softc *ahc, bus_dma_tag_t /*dmat*/, 219 bus_dmamap_t /*map*/, void * /*buf*/, 220 bus_size_t /*buflen*/, bus_dmamap_callback_t *, 221 void */*callback_arg*/, int /*flags*/); 222 223 int ahc_dmamap_unload(struct ahc_softc *, bus_dma_tag_t, bus_dmamap_t); 224 225 /* 226 * Operations performed by ahc_dmamap_sync(). 227 */ 228 #define BUS_DMASYNC_PREREAD 0x01 /* pre-read synchronization */ 229 #define BUS_DMASYNC_POSTREAD 0x02 /* post-read synchronization */ 230 #define BUS_DMASYNC_PREWRITE 0x04 /* pre-write synchronization */ 231 #define BUS_DMASYNC_POSTWRITE 0x08 /* post-write synchronization */ 232 233 /* 234 * XXX 235 * ahc_dmamap_sync is only used on buffers allocated with 236 * the pci_alloc_consistent() API. Although I'm not sure how 237 * this works on architectures with a write buffer, Linux does 238 * not have an API to sync "coherent" memory. Perhaps we need 239 * to do an mb()? 240 */ 241 #define ahc_dmamap_sync(ahc, dma_tag, dmamap, offset, len, op) 242 243 /************************** Timer DataStructures ******************************/ 244 typedef struct timer_list ahc_timer_t; 245 246 /********************************** Includes **********************************/ 247 #ifdef CONFIG_AIC7XXX_REG_PRETTY_PRINT 248 #define AIC_DEBUG_REGISTERS 1 249 #else 250 #define AIC_DEBUG_REGISTERS 0 251 #endif 252 #include "aic7xxx.h" 253 254 /***************************** Timer Facilities *******************************/ 255 #define ahc_timer_init init_timer 256 #define ahc_timer_stop del_timer_sync 257 typedef void ahc_linux_callback_t (u_long); 258 static __inline void ahc_timer_reset(ahc_timer_t *timer, int usec, 259 ahc_callback_t *func, void *arg); 260 static __inline void ahc_scb_timer_reset(struct scb *scb, u_int usec); 261 262 static __inline void 263 ahc_timer_reset(ahc_timer_t *timer, int usec, ahc_callback_t *func, void *arg) 264 { 265 struct ahc_softc *ahc; 266 267 ahc = (struct ahc_softc *)arg; 268 del_timer(timer); 269 timer->data = (u_long)arg; 270 timer->expires = jiffies + (usec * HZ)/1000000; 271 timer->function = (ahc_linux_callback_t*)func; 272 add_timer(timer); 273 } 274 275 static __inline void 276 ahc_scb_timer_reset(struct scb *scb, u_int usec) 277 { 278 mod_timer(&scb->io_ctx->eh_timeout, jiffies + (usec * HZ)/1000000); 279 } 280 281 /***************************** SMP support ************************************/ 282 #include <linux/spinlock.h> 283 284 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0) || defined(SCSI_HAS_HOST_LOCK)) 285 #define AHC_SCSI_HAS_HOST_LOCK 1 286 #else 287 #define AHC_SCSI_HAS_HOST_LOCK 0 288 #endif 289 290 #define AIC7XXX_DRIVER_VERSION "6.2.36" 291 292 /**************************** Front End Queues ********************************/ 293 /* 294 * Data structure used to cast the Linux struct scsi_cmnd to something 295 * that allows us to use the queue macros. The linux structure has 296 * plenty of space to hold the links fields as required by the queue 297 * macros, but the queue macors require them to have the correct type. 298 */ 299 struct ahc_cmd_internal { 300 /* Area owned by the Linux scsi layer. */ 301 uint8_t private[offsetof(struct scsi_cmnd, SCp.Status)]; 302 union { 303 STAILQ_ENTRY(ahc_cmd) ste; 304 LIST_ENTRY(ahc_cmd) le; 305 TAILQ_ENTRY(ahc_cmd) tqe; 306 } links; 307 uint32_t end; 308 }; 309 310 struct ahc_cmd { 311 union { 312 struct ahc_cmd_internal icmd; 313 struct scsi_cmnd scsi_cmd; 314 } un; 315 }; 316 317 #define acmd_icmd(cmd) ((cmd)->un.icmd) 318 #define acmd_scsi_cmd(cmd) ((cmd)->un.scsi_cmd) 319 #define acmd_links un.icmd.links 320 321 /*************************** Device Data Structures ***************************/ 322 /* 323 * A per probed device structure used to deal with some error recovery 324 * scenarios that the Linux mid-layer code just doesn't know how to 325 * handle. The structure allocated for a device only becomes persistent 326 * after a successfully completed inquiry command to the target when 327 * that inquiry data indicates a lun is present. 328 */ 329 TAILQ_HEAD(ahc_busyq, ahc_cmd); 330 typedef enum { 331 AHC_DEV_UNCONFIGURED = 0x01, 332 AHC_DEV_FREEZE_TIL_EMPTY = 0x02, /* Freeze queue until active == 0 */ 333 AHC_DEV_TIMER_ACTIVE = 0x04, /* Our timer is active */ 334 AHC_DEV_ON_RUN_LIST = 0x08, /* Queued to be run later */ 335 AHC_DEV_Q_BASIC = 0x10, /* Allow basic device queuing */ 336 AHC_DEV_Q_TAGGED = 0x20, /* Allow full SCSI2 command queueing */ 337 AHC_DEV_PERIODIC_OTAG = 0x40, /* Send OTAG to prevent starvation */ 338 AHC_DEV_SLAVE_CONFIGURED = 0x80 /* slave_configure() has been called */ 339 } ahc_linux_dev_flags; 340 341 struct ahc_linux_target; 342 struct ahc_linux_device { 343 TAILQ_ENTRY(ahc_linux_device) links; 344 struct ahc_busyq busyq; 345 346 /* 347 * The number of transactions currently 348 * queued to the device. 349 */ 350 int active; 351 352 /* 353 * The currently allowed number of 354 * transactions that can be queued to 355 * the device. Must be signed for 356 * conversion from tagged to untagged 357 * mode where the device may have more 358 * than one outstanding active transaction. 359 */ 360 int openings; 361 362 /* 363 * A positive count indicates that this 364 * device's queue is halted. 365 */ 366 u_int qfrozen; 367 368 /* 369 * Cumulative command counter. 370 */ 371 u_long commands_issued; 372 373 /* 374 * The number of tagged transactions when 375 * running at our current opening level 376 * that have been successfully received by 377 * this device since the last QUEUE FULL. 378 */ 379 u_int tag_success_count; 380 #define AHC_TAG_SUCCESS_INTERVAL 50 381 382 ahc_linux_dev_flags flags; 383 384 /* 385 * Per device timer. 386 */ 387 struct timer_list timer; 388 389 /* 390 * The high limit for the tags variable. 391 */ 392 u_int maxtags; 393 394 /* 395 * The computed number of tags outstanding 396 * at the time of the last QUEUE FULL event. 397 */ 398 u_int tags_on_last_queuefull; 399 400 /* 401 * How many times we have seen a queue full 402 * with the same number of tags. This is used 403 * to stop our adaptive queue depth algorithm 404 * on devices with a fixed number of tags. 405 */ 406 u_int last_queuefull_same_count; 407 #define AHC_LOCK_TAGS_COUNT 50 408 409 /* 410 * How many transactions have been queued 411 * without the device going idle. We use 412 * this statistic to determine when to issue 413 * an ordered tag to prevent transaction 414 * starvation. This statistic is only updated 415 * if the AHC_DEV_PERIODIC_OTAG flag is set 416 * on this device. 417 */ 418 u_int commands_since_idle_or_otag; 419 #define AHC_OTAG_THRESH 500 420 421 int lun; 422 Scsi_Device *scsi_device; 423 struct ahc_linux_target *target; 424 }; 425 426 typedef enum { 427 AHC_DV_REQUIRED = 0x01, 428 AHC_INQ_VALID = 0x02, 429 AHC_BASIC_DV = 0x04, 430 AHC_ENHANCED_DV = 0x08 431 } ahc_linux_targ_flags; 432 433 /* DV States */ 434 typedef enum { 435 AHC_DV_STATE_EXIT = 0, 436 AHC_DV_STATE_INQ_SHORT_ASYNC, 437 AHC_DV_STATE_INQ_ASYNC, 438 AHC_DV_STATE_INQ_ASYNC_VERIFY, 439 AHC_DV_STATE_TUR, 440 AHC_DV_STATE_REBD, 441 AHC_DV_STATE_INQ_VERIFY, 442 AHC_DV_STATE_WEB, 443 AHC_DV_STATE_REB, 444 AHC_DV_STATE_SU, 445 AHC_DV_STATE_BUSY 446 } ahc_dv_state; 447 448 struct ahc_linux_target { 449 struct ahc_linux_device *devices[AHC_NUM_LUNS]; 450 int channel; 451 int target; 452 int refcount; 453 struct ahc_transinfo last_tinfo; 454 struct ahc_softc *ahc; 455 ahc_linux_targ_flags flags; 456 struct scsi_inquiry_data *inq_data; 457 /* 458 * The next "fallback" period to use for narrow/wide transfers. 459 */ 460 uint8_t dv_next_narrow_period; 461 uint8_t dv_next_wide_period; 462 uint8_t dv_max_width; 463 uint8_t dv_max_ppr_options; 464 uint8_t dv_last_ppr_options; 465 u_int dv_echo_size; 466 ahc_dv_state dv_state; 467 u_int dv_state_retry; 468 char *dv_buffer; 469 char *dv_buffer1; 470 }; 471 472 /********************* Definitions Required by the Core ***********************/ 473 /* 474 * Number of SG segments we require. So long as the S/G segments for 475 * a particular transaction are allocated in a physically contiguous 476 * manner and are allocated below 4GB, the number of S/G segments is 477 * unrestricted. 478 */ 479 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 480 /* 481 * We dynamically adjust the number of segments in pre-2.5 kernels to 482 * avoid fragmentation issues in the SCSI mid-layer's private memory 483 * allocator. See aic7xxx_osm.c ahc_linux_size_nseg() for details. 484 */ 485 extern u_int ahc_linux_nseg; 486 #define AHC_NSEG ahc_linux_nseg 487 #define AHC_LINUX_MIN_NSEG 64 488 #else 489 #define AHC_NSEG 128 490 #endif 491 492 /* 493 * Per-SCB OSM storage. 494 */ 495 typedef enum { 496 AHC_UP_EH_SEMAPHORE = 0x1 497 } ahc_linux_scb_flags; 498 499 struct scb_platform_data { 500 struct ahc_linux_device *dev; 501 dma_addr_t buf_busaddr; 502 uint32_t xfer_len; 503 uint32_t sense_resid; /* Auto-Sense residual */ 504 ahc_linux_scb_flags flags; 505 }; 506 507 /* 508 * Define a structure used for each host adapter. All members are 509 * aligned on a boundary >= the size of the member to honor the 510 * alignment restrictions of the various platforms supported by 511 * this driver. 512 */ 513 typedef enum { 514 AHC_DV_WAIT_SIMQ_EMPTY = 0x01, 515 AHC_DV_WAIT_SIMQ_RELEASE = 0x02, 516 AHC_DV_ACTIVE = 0x04, 517 AHC_DV_SHUTDOWN = 0x08, 518 AHC_RUN_CMPLT_Q_TIMER = 0x10 519 } ahc_linux_softc_flags; 520 521 TAILQ_HEAD(ahc_completeq, ahc_cmd); 522 523 struct ahc_platform_data { 524 /* 525 * Fields accessed from interrupt context. 526 */ 527 struct ahc_linux_target *targets[AHC_NUM_TARGETS]; 528 TAILQ_HEAD(, ahc_linux_device) device_runq; 529 struct ahc_completeq completeq; 530 531 spinlock_t spin_lock; 532 struct tasklet_struct runq_tasklet; 533 u_int qfrozen; 534 pid_t dv_pid; 535 struct timer_list completeq_timer; 536 struct timer_list reset_timer; 537 struct semaphore eh_sem; 538 struct semaphore dv_sem; 539 struct semaphore dv_cmd_sem; /* XXX This needs to be in 540 * the target struct 541 */ 542 struct scsi_device *dv_scsi_dev; 543 struct Scsi_Host *host; /* pointer to scsi host */ 544 #define AHC_LINUX_NOIRQ ((uint32_t)~0) 545 uint32_t irq; /* IRQ for this adapter */ 546 uint32_t bios_address; 547 uint32_t mem_busaddr; /* Mem Base Addr */ 548 uint64_t hw_dma_mask; 549 ahc_linux_softc_flags flags; 550 }; 551 552 /************************** OS Utility Wrappers *******************************/ 553 #define printf printk 554 #define M_NOWAIT GFP_ATOMIC 555 #define M_WAITOK 0 556 #define malloc(size, type, flags) kmalloc(size, flags) 557 #define free(ptr, type) kfree(ptr) 558 559 static __inline void ahc_delay(long); 560 static __inline void 561 ahc_delay(long usec) 562 { 563 /* 564 * udelay on Linux can have problems for 565 * multi-millisecond waits. Wait at most 566 * 1024us per call. 567 */ 568 while (usec > 0) { 569 udelay(usec % 1024); 570 usec -= 1024; 571 } 572 } 573 574 575 /***************************** Low Level I/O **********************************/ 576 static __inline uint8_t ahc_inb(struct ahc_softc * ahc, long port); 577 static __inline void ahc_outb(struct ahc_softc * ahc, long port, uint8_t val); 578 static __inline void ahc_outsb(struct ahc_softc * ahc, long port, 579 uint8_t *, int count); 580 static __inline void ahc_insb(struct ahc_softc * ahc, long port, 581 uint8_t *, int count); 582 583 static __inline uint8_t 584 ahc_inb(struct ahc_softc * ahc, long port) 585 { 586 uint8_t x; 587 588 if (ahc->tag == BUS_SPACE_MEMIO) { 589 x = readb(ahc->bsh.maddr + port); 590 } else { 591 x = inb(ahc->bsh.ioport + port); 592 } 593 mb(); 594 return (x); 595 } 596 597 static __inline void 598 ahc_outb(struct ahc_softc * ahc, long port, uint8_t val) 599 { 600 if (ahc->tag == BUS_SPACE_MEMIO) { 601 writeb(val, ahc->bsh.maddr + port); 602 } else { 603 outb(val, ahc->bsh.ioport + port); 604 } 605 mb(); 606 } 607 608 static __inline void 609 ahc_outsb(struct ahc_softc * ahc, long port, uint8_t *array, int count) 610 { 611 int i; 612 613 /* 614 * There is probably a more efficient way to do this on Linux 615 * but we don't use this for anything speed critical and this 616 * should work. 617 */ 618 for (i = 0; i < count; i++) 619 ahc_outb(ahc, port, *array++); 620 } 621 622 static __inline void 623 ahc_insb(struct ahc_softc * ahc, long port, uint8_t *array, int count) 624 { 625 int i; 626 627 /* 628 * There is probably a more efficient way to do this on Linux 629 * but we don't use this for anything speed critical and this 630 * should work. 631 */ 632 for (i = 0; i < count; i++) 633 *array++ = ahc_inb(ahc, port); 634 } 635 636 /**************************** Initialization **********************************/ 637 int ahc_linux_register_host(struct ahc_softc *, 638 Scsi_Host_Template *); 639 640 uint64_t ahc_linux_get_memsize(void); 641 642 /*************************** Pretty Printing **********************************/ 643 struct info_str { 644 char *buffer; 645 int length; 646 off_t offset; 647 int pos; 648 }; 649 650 void ahc_format_transinfo(struct info_str *info, 651 struct ahc_transinfo *tinfo); 652 653 /******************************** Locking *************************************/ 654 /* Lock protecting internal data structures */ 655 static __inline void ahc_lockinit(struct ahc_softc *); 656 static __inline void ahc_lock(struct ahc_softc *, unsigned long *flags); 657 static __inline void ahc_unlock(struct ahc_softc *, unsigned long *flags); 658 659 /* Lock acquisition and release of the above lock in midlayer entry points. */ 660 static __inline void ahc_midlayer_entrypoint_lock(struct ahc_softc *, 661 unsigned long *flags); 662 static __inline void ahc_midlayer_entrypoint_unlock(struct ahc_softc *, 663 unsigned long *flags); 664 665 /* Lock held during command compeletion to the upper layer */ 666 static __inline void ahc_done_lockinit(struct ahc_softc *); 667 static __inline void ahc_done_lock(struct ahc_softc *, unsigned long *flags); 668 static __inline void ahc_done_unlock(struct ahc_softc *, unsigned long *flags); 669 670 /* Lock held during ahc_list manipulation and ahc softc frees */ 671 extern spinlock_t ahc_list_spinlock; 672 static __inline void ahc_list_lockinit(void); 673 static __inline void ahc_list_lock(unsigned long *flags); 674 static __inline void ahc_list_unlock(unsigned long *flags); 675 676 static __inline void 677 ahc_lockinit(struct ahc_softc *ahc) 678 { 679 spin_lock_init(&ahc->platform_data->spin_lock); 680 } 681 682 static __inline void 683 ahc_lock(struct ahc_softc *ahc, unsigned long *flags) 684 { 685 spin_lock_irqsave(&ahc->platform_data->spin_lock, *flags); 686 } 687 688 static __inline void 689 ahc_unlock(struct ahc_softc *ahc, unsigned long *flags) 690 { 691 spin_unlock_irqrestore(&ahc->platform_data->spin_lock, *flags); 692 } 693 694 static __inline void 695 ahc_midlayer_entrypoint_lock(struct ahc_softc *ahc, unsigned long *flags) 696 { 697 /* 698 * In 2.5.X and some 2.4.X versions, the midlayer takes our 699 * lock just before calling us, so we avoid locking again. 700 * For other kernel versions, the io_request_lock is taken 701 * just before our entry point is called. In this case, we 702 * trade the io_request_lock for our per-softc lock. 703 */ 704 #if AHC_SCSI_HAS_HOST_LOCK == 0 705 spin_unlock(&io_request_lock); 706 spin_lock(&ahc->platform_data->spin_lock); 707 #endif 708 } 709 710 static __inline void 711 ahc_midlayer_entrypoint_unlock(struct ahc_softc *ahc, unsigned long *flags) 712 { 713 #if AHC_SCSI_HAS_HOST_LOCK == 0 714 spin_unlock(&ahc->platform_data->spin_lock); 715 spin_lock(&io_request_lock); 716 #endif 717 } 718 719 static __inline void 720 ahc_done_lockinit(struct ahc_softc *ahc) 721 { 722 /* 723 * In 2.5.X, our own lock is held during completions. 724 * In previous versions, the io_request_lock is used. 725 * In either case, we can't initialize this lock again. 726 */ 727 } 728 729 static __inline void 730 ahc_done_lock(struct ahc_softc *ahc, unsigned long *flags) 731 { 732 #if AHC_SCSI_HAS_HOST_LOCK == 0 733 spin_lock_irqsave(&io_request_lock, *flags); 734 #endif 735 } 736 737 static __inline void 738 ahc_done_unlock(struct ahc_softc *ahc, unsigned long *flags) 739 { 740 #if AHC_SCSI_HAS_HOST_LOCK == 0 741 spin_unlock_irqrestore(&io_request_lock, *flags); 742 #endif 743 } 744 745 static __inline void 746 ahc_list_lockinit(void) 747 { 748 spin_lock_init(&ahc_list_spinlock); 749 } 750 751 static __inline void 752 ahc_list_lock(unsigned long *flags) 753 { 754 spin_lock_irqsave(&ahc_list_spinlock, *flags); 755 } 756 757 static __inline void 758 ahc_list_unlock(unsigned long *flags) 759 { 760 spin_unlock_irqrestore(&ahc_list_spinlock, *flags); 761 } 762 763 /******************************* PCI Definitions ******************************/ 764 /* 765 * PCIM_xxx: mask to locate subfield in register 766 * PCIR_xxx: config register offset 767 * PCIC_xxx: device class 768 * PCIS_xxx: device subclass 769 * PCIP_xxx: device programming interface 770 * PCIV_xxx: PCI vendor ID (only required to fixup ancient devices) 771 * PCID_xxx: device ID 772 */ 773 #define PCIR_DEVVENDOR 0x00 774 #define PCIR_VENDOR 0x00 775 #define PCIR_DEVICE 0x02 776 #define PCIR_COMMAND 0x04 777 #define PCIM_CMD_PORTEN 0x0001 778 #define PCIM_CMD_MEMEN 0x0002 779 #define PCIM_CMD_BUSMASTEREN 0x0004 780 #define PCIM_CMD_MWRICEN 0x0010 781 #define PCIM_CMD_PERRESPEN 0x0040 782 #define PCIM_CMD_SERRESPEN 0x0100 783 #define PCIR_STATUS 0x06 784 #define PCIR_REVID 0x08 785 #define PCIR_PROGIF 0x09 786 #define PCIR_SUBCLASS 0x0a 787 #define PCIR_CLASS 0x0b 788 #define PCIR_CACHELNSZ 0x0c 789 #define PCIR_LATTIMER 0x0d 790 #define PCIR_HEADERTYPE 0x0e 791 #define PCIM_MFDEV 0x80 792 #define PCIR_BIST 0x0f 793 #define PCIR_CAP_PTR 0x34 794 795 /* config registers for header type 0 devices */ 796 #define PCIR_MAPS 0x10 797 #define PCIR_SUBVEND_0 0x2c 798 #define PCIR_SUBDEV_0 0x2e 799 800 extern struct pci_driver aic7xxx_pci_driver; 801 802 typedef enum 803 { 804 AHC_POWER_STATE_D0, 805 AHC_POWER_STATE_D1, 806 AHC_POWER_STATE_D2, 807 AHC_POWER_STATE_D3 808 } ahc_power_state; 809 810 /**************************** VL/EISA Routines ********************************/ 811 #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) \ 812 && (defined(__i386__) || defined(__alpha__)) \ 813 && (!defined(CONFIG_EISA))) 814 #define CONFIG_EISA 815 #endif 816 817 #ifdef CONFIG_EISA 818 extern uint32_t aic7xxx_probe_eisa_vl; 819 int ahc_linux_eisa_init(void); 820 void ahc_linux_eisa_exit(void); 821 int aic7770_map_registers(struct ahc_softc *ahc, 822 u_int port); 823 int aic7770_map_int(struct ahc_softc *ahc, u_int irq); 824 #else 825 static inline int ahc_linux_eisa_init(void) { 826 return -ENODEV; 827 } 828 static inline void ahc_linux_eisa_exit(void) { 829 } 830 #endif 831 832 /******************************* PCI Routines *********************************/ 833 #ifdef CONFIG_PCI 834 int ahc_linux_pci_init(void); 835 void ahc_linux_pci_exit(void); 836 int ahc_pci_map_registers(struct ahc_softc *ahc); 837 int ahc_pci_map_int(struct ahc_softc *ahc); 838 839 static __inline uint32_t ahc_pci_read_config(ahc_dev_softc_t pci, 840 int reg, int width); 841 842 static __inline uint32_t 843 ahc_pci_read_config(ahc_dev_softc_t pci, int reg, int width) 844 { 845 switch (width) { 846 case 1: 847 { 848 uint8_t retval; 849 850 pci_read_config_byte(pci, reg, &retval); 851 return (retval); 852 } 853 case 2: 854 { 855 uint16_t retval; 856 pci_read_config_word(pci, reg, &retval); 857 return (retval); 858 } 859 case 4: 860 { 861 uint32_t retval; 862 pci_read_config_dword(pci, reg, &retval); 863 return (retval); 864 } 865 default: 866 panic("ahc_pci_read_config: Read size too big"); 867 /* NOTREACHED */ 868 return (0); 869 } 870 } 871 872 static __inline void ahc_pci_write_config(ahc_dev_softc_t pci, 873 int reg, uint32_t value, 874 int width); 875 876 static __inline void 877 ahc_pci_write_config(ahc_dev_softc_t pci, int reg, uint32_t value, int width) 878 { 879 switch (width) { 880 case 1: 881 pci_write_config_byte(pci, reg, value); 882 break; 883 case 2: 884 pci_write_config_word(pci, reg, value); 885 break; 886 case 4: 887 pci_write_config_dword(pci, reg, value); 888 break; 889 default: 890 panic("ahc_pci_write_config: Write size too big"); 891 /* NOTREACHED */ 892 } 893 } 894 895 static __inline int ahc_get_pci_function(ahc_dev_softc_t); 896 static __inline int 897 ahc_get_pci_function(ahc_dev_softc_t pci) 898 { 899 return (PCI_FUNC(pci->devfn)); 900 } 901 902 static __inline int ahc_get_pci_slot(ahc_dev_softc_t); 903 static __inline int 904 ahc_get_pci_slot(ahc_dev_softc_t pci) 905 { 906 return (PCI_SLOT(pci->devfn)); 907 } 908 909 static __inline int ahc_get_pci_bus(ahc_dev_softc_t); 910 static __inline int 911 ahc_get_pci_bus(ahc_dev_softc_t pci) 912 { 913 return (pci->bus->number); 914 } 915 #else 916 static inline int ahc_linux_pci_init(void) { 917 return 0; 918 } 919 static inline void ahc_linux_pci_exit(void) { 920 } 921 #endif 922 923 static __inline void ahc_flush_device_writes(struct ahc_softc *); 924 static __inline void 925 ahc_flush_device_writes(struct ahc_softc *ahc) 926 { 927 /* XXX Is this sufficient for all architectures??? */ 928 ahc_inb(ahc, INTSTAT); 929 } 930 931 /**************************** Proc FS Support *********************************/ 932 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 933 int ahc_linux_proc_info(char *, char **, off_t, int, int, int); 934 #else 935 int ahc_linux_proc_info(struct Scsi_Host *, char *, char **, 936 off_t, int, int); 937 #endif 938 939 /*************************** Domain Validation ********************************/ 940 #define AHC_DV_CMD(cmd) ((cmd)->scsi_done == ahc_linux_dv_complete) 941 #define AHC_DV_SIMQ_FROZEN(ahc) \ 942 ((((ahc)->platform_data->flags & AHC_DV_ACTIVE) != 0) \ 943 && (ahc)->platform_data->qfrozen == 1) 944 945 /*********************** Transaction Access Wrappers *************************/ 946 static __inline void ahc_cmd_set_transaction_status(Scsi_Cmnd *, uint32_t); 947 static __inline void ahc_set_transaction_status(struct scb *, uint32_t); 948 static __inline void ahc_cmd_set_scsi_status(Scsi_Cmnd *, uint32_t); 949 static __inline void ahc_set_scsi_status(struct scb *, uint32_t); 950 static __inline uint32_t ahc_cmd_get_transaction_status(Scsi_Cmnd *cmd); 951 static __inline uint32_t ahc_get_transaction_status(struct scb *); 952 static __inline uint32_t ahc_cmd_get_scsi_status(Scsi_Cmnd *cmd); 953 static __inline uint32_t ahc_get_scsi_status(struct scb *); 954 static __inline void ahc_set_transaction_tag(struct scb *, int, u_int); 955 static __inline u_long ahc_get_transfer_length(struct scb *); 956 static __inline int ahc_get_transfer_dir(struct scb *); 957 static __inline void ahc_set_residual(struct scb *, u_long); 958 static __inline void ahc_set_sense_residual(struct scb *scb, u_long resid); 959 static __inline u_long ahc_get_residual(struct scb *); 960 static __inline u_long ahc_get_sense_residual(struct scb *); 961 static __inline int ahc_perform_autosense(struct scb *); 962 static __inline uint32_t ahc_get_sense_bufsize(struct ahc_softc *, 963 struct scb *); 964 static __inline void ahc_notify_xfer_settings_change(struct ahc_softc *, 965 struct ahc_devinfo *); 966 static __inline void ahc_platform_scb_free(struct ahc_softc *ahc, 967 struct scb *scb); 968 static __inline void ahc_freeze_scb(struct scb *scb); 969 970 static __inline 971 void ahc_cmd_set_transaction_status(Scsi_Cmnd *cmd, uint32_t status) 972 { 973 cmd->result &= ~(CAM_STATUS_MASK << 16); 974 cmd->result |= status << 16; 975 } 976 977 static __inline 978 void ahc_set_transaction_status(struct scb *scb, uint32_t status) 979 { 980 ahc_cmd_set_transaction_status(scb->io_ctx,status); 981 } 982 983 static __inline 984 void ahc_cmd_set_scsi_status(Scsi_Cmnd *cmd, uint32_t status) 985 { 986 cmd->result &= ~0xFFFF; 987 cmd->result |= status; 988 } 989 990 static __inline 991 void ahc_set_scsi_status(struct scb *scb, uint32_t status) 992 { 993 ahc_cmd_set_scsi_status(scb->io_ctx, status); 994 } 995 996 static __inline 997 uint32_t ahc_cmd_get_transaction_status(Scsi_Cmnd *cmd) 998 { 999 return ((cmd->result >> 16) & CAM_STATUS_MASK); 1000 } 1001 1002 static __inline 1003 uint32_t ahc_get_transaction_status(struct scb *scb) 1004 { 1005 return (ahc_cmd_get_transaction_status(scb->io_ctx)); 1006 } 1007 1008 static __inline 1009 uint32_t ahc_cmd_get_scsi_status(Scsi_Cmnd *cmd) 1010 { 1011 return (cmd->result & 0xFFFF); 1012 } 1013 1014 static __inline 1015 uint32_t ahc_get_scsi_status(struct scb *scb) 1016 { 1017 return (ahc_cmd_get_scsi_status(scb->io_ctx)); 1018 } 1019 1020 static __inline 1021 void ahc_set_transaction_tag(struct scb *scb, int enabled, u_int type) 1022 { 1023 /* 1024 * Nothing to do for linux as the incoming transaction 1025 * has no concept of tag/non tagged, etc. 1026 */ 1027 } 1028 1029 static __inline 1030 u_long ahc_get_transfer_length(struct scb *scb) 1031 { 1032 return (scb->platform_data->xfer_len); 1033 } 1034 1035 static __inline 1036 int ahc_get_transfer_dir(struct scb *scb) 1037 { 1038 return (scb->io_ctx->sc_data_direction); 1039 } 1040 1041 static __inline 1042 void ahc_set_residual(struct scb *scb, u_long resid) 1043 { 1044 scb->io_ctx->resid = resid; 1045 } 1046 1047 static __inline 1048 void ahc_set_sense_residual(struct scb *scb, u_long resid) 1049 { 1050 scb->platform_data->sense_resid = resid; 1051 } 1052 1053 static __inline 1054 u_long ahc_get_residual(struct scb *scb) 1055 { 1056 return (scb->io_ctx->resid); 1057 } 1058 1059 static __inline 1060 u_long ahc_get_sense_residual(struct scb *scb) 1061 { 1062 return (scb->platform_data->sense_resid); 1063 } 1064 1065 static __inline 1066 int ahc_perform_autosense(struct scb *scb) 1067 { 1068 /* 1069 * We always perform autosense in Linux. 1070 * On other platforms this is set on a 1071 * per-transaction basis. 1072 */ 1073 return (1); 1074 } 1075 1076 static __inline uint32_t 1077 ahc_get_sense_bufsize(struct ahc_softc *ahc, struct scb *scb) 1078 { 1079 return (sizeof(struct scsi_sense_data)); 1080 } 1081 1082 static __inline void 1083 ahc_notify_xfer_settings_change(struct ahc_softc *ahc, 1084 struct ahc_devinfo *devinfo) 1085 { 1086 /* Nothing to do here for linux */ 1087 } 1088 1089 static __inline void 1090 ahc_platform_scb_free(struct ahc_softc *ahc, struct scb *scb) 1091 { 1092 ahc->flags &= ~AHC_RESOURCE_SHORTAGE; 1093 } 1094 1095 int ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg); 1096 void ahc_platform_free(struct ahc_softc *ahc); 1097 void ahc_platform_freeze_devq(struct ahc_softc *ahc, struct scb *scb); 1098 1099 static __inline void 1100 ahc_freeze_scb(struct scb *scb) 1101 { 1102 if ((scb->io_ctx->result & (CAM_DEV_QFRZN << 16)) == 0) { 1103 scb->io_ctx->result |= CAM_DEV_QFRZN << 16; 1104 scb->platform_data->dev->qfrozen++; 1105 } 1106 } 1107 1108 void ahc_platform_set_tags(struct ahc_softc *ahc, 1109 struct ahc_devinfo *devinfo, ahc_queue_alg); 1110 int ahc_platform_abort_scbs(struct ahc_softc *ahc, int target, 1111 char channel, int lun, u_int tag, 1112 role_t role, uint32_t status); 1113 irqreturn_t 1114 ahc_linux_isr(int irq, void *dev_id, struct pt_regs * regs); 1115 void ahc_platform_flushwork(struct ahc_softc *ahc); 1116 int ahc_softc_comp(struct ahc_softc *, struct ahc_softc *); 1117 void ahc_done(struct ahc_softc*, struct scb*); 1118 void ahc_send_async(struct ahc_softc *, char channel, 1119 u_int target, u_int lun, ac_code, void *); 1120 void ahc_print_path(struct ahc_softc *, struct scb *); 1121 void ahc_platform_dump_card_state(struct ahc_softc *ahc); 1122 1123 #ifdef CONFIG_PCI 1124 #define AHC_PCI_CONFIG 1 1125 #else 1126 #define AHC_PCI_CONFIG 0 1127 #endif 1128 #define bootverbose aic7xxx_verbose 1129 extern u_int aic7xxx_verbose; 1130 #endif /* _AIC7XXX_LINUX_H_ */ 1131