Blame view
drivers/block/sx8.c
40 KB
1da177e4c Linux-2.6.12-rc2 |
1 2 3 |
/* * sx8.c: Driver for Promise SATA SX8 looks-like-I2O hardware * |
2d5a2ae52 drivers/block/sx8... |
4 |
* Copyright 2004-2005 Red Hat, Inc. |
1da177e4c Linux-2.6.12-rc2 |
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 |
* * Author/maintainer: Jeff Garzik <jgarzik@pobox.com> * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/pci.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/blkdev.h> #include <linux/sched.h> |
1da177e4c Linux-2.6.12-rc2 |
21 22 23 24 25 26 27 |
#include <linux/interrupt.h> #include <linux/compiler.h> #include <linux/workqueue.h> #include <linux/bitops.h> #include <linux/delay.h> #include <linux/time.h> #include <linux/hdreg.h> |
a3948663e [PATCH] drivers/b... |
28 |
#include <linux/dma-mapping.h> |
906c3b75f [PATCH] mutex sub... |
29 |
#include <linux/completion.h> |
117636092 [PATCH] Fix break... |
30 |
#include <linux/scatterlist.h> |
1da177e4c Linux-2.6.12-rc2 |
31 |
#include <asm/io.h> |
1da177e4c Linux-2.6.12-rc2 |
32 |
#include <asm/uaccess.h> |
1da177e4c Linux-2.6.12-rc2 |
33 34 35 36 37 38 39 40 41 42 |
#if 0 #define CARM_DEBUG #define CARM_VERBOSE_DEBUG #else #undef CARM_DEBUG #undef CARM_VERBOSE_DEBUG #endif #undef CARM_NDEBUG #define DRV_NAME "sx8" |
2d5a2ae52 drivers/block/sx8... |
43 |
#define DRV_VERSION "1.0" |
1da177e4c Linux-2.6.12-rc2 |
44 |
#define PFX DRV_NAME ": " |
2d5a2ae52 drivers/block/sx8... |
45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 |
MODULE_AUTHOR("Jeff Garzik"); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Promise SATA SX8 block driver"); MODULE_VERSION(DRV_VERSION); /* * SX8 hardware has a single message queue for all ATA ports. * When this driver was written, the hardware (firmware?) would * corrupt data eventually, if more than one request was outstanding. * As one can imagine, having 8 ports bottlenecking on a single * command hurts performance. * * Based on user reports, later versions of the hardware (firmware?) * seem to be able to survive with more than one command queued. * * Therefore, we default to the safe option -- 1 command -- but * allow the user to increase this. * * SX8 should be able to support up to ~60 queued commands (CARM_MAX_REQ), * but problems seem to occur when you exceed ~30, even on newer hardware. */ static int max_queue = 1; module_param(max_queue, int, 0444); MODULE_PARM_DESC(max_queue, "Maximum number of queued commands. (min==1, max==30, safe==1)"); |
1da177e4c Linux-2.6.12-rc2 |
69 70 71 72 73 74 75 76 77 |
#define NEXT_RESP(idx) ((idx + 1) % RMSG_Q_LEN) /* 0xf is just arbitrary, non-zero noise; this is sorta like poisoning */ #define TAG_ENCODE(tag) (((tag) << 16) | 0xf) #define TAG_DECODE(tag) (((tag) >> 16) & 0x1f) #define TAG_VALID(tag) ((((tag) & 0xf) == 0xf) && (TAG_DECODE(tag) < 32)) /* note: prints function name for you */ #ifdef CARM_DEBUG |
cece93399 block: replace re... |
78 |
#define DPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) |
1da177e4c Linux-2.6.12-rc2 |
79 |
#ifdef CARM_VERBOSE_DEBUG |
cece93399 block: replace re... |
80 |
#define VPRINTK(fmt, args...) printk(KERN_ERR "%s: " fmt, __func__, ## args) |
1da177e4c Linux-2.6.12-rc2 |
81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 |
#else #define VPRINTK(fmt, args...) #endif /* CARM_VERBOSE_DEBUG */ #else #define DPRINTK(fmt, args...) #define VPRINTK(fmt, args...) #endif /* CARM_DEBUG */ #ifdef CARM_NDEBUG #define assert(expr) #else #define assert(expr) \ if(unlikely(!(expr))) { \ printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d ", \ |
cece93399 block: replace re... |
96 |
#expr, __FILE__, __func__, __LINE__); \ |
1da177e4c Linux-2.6.12-rc2 |
97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 |
} #endif /* defines only for the constants which don't work well as enums */ struct carm_host; enum { /* adapter-wide limits */ CARM_MAX_PORTS = 8, CARM_SHM_SIZE = (4096 << 7), CARM_MINORS_PER_MAJOR = 256 / CARM_MAX_PORTS, CARM_MAX_WAIT_Q = CARM_MAX_PORTS + 1, /* command message queue limits */ CARM_MAX_REQ = 64, /* max command msgs per host */ |
1da177e4c Linux-2.6.12-rc2 |
112 113 114 115 |
CARM_MSG_LOW_WATER = (CARM_MAX_REQ / 4), /* refill mark */ /* S/G limits, host-wide and per-request */ CARM_MAX_REQ_SG = 32, /* max s/g entries per request */ |
1da177e4c Linux-2.6.12-rc2 |
116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 |
CARM_MAX_HOST_SG = 600, /* max s/g entries per host */ CARM_SG_LOW_WATER = (CARM_MAX_HOST_SG / 4), /* re-fill mark */ /* hardware registers */ CARM_IHQP = 0x1c, CARM_INT_STAT = 0x10, /* interrupt status */ CARM_INT_MASK = 0x14, /* interrupt mask */ CARM_HMUC = 0x18, /* host message unit control */ RBUF_ADDR_LO = 0x20, /* response msg DMA buf low 32 bits */ RBUF_ADDR_HI = 0x24, /* response msg DMA buf high 32 bits */ RBUF_BYTE_SZ = 0x28, CARM_RESP_IDX = 0x2c, CARM_CMS0 = 0x30, /* command message size reg 0 */ CARM_LMUC = 0x48, CARM_HMPHA = 0x6c, CARM_INITC = 0xb5, /* bits in CARM_INT_{STAT,MASK} */ INT_RESERVED = 0xfffffff0, INT_WATCHDOG = (1 << 3), /* watchdog timer */ INT_Q_OVERFLOW = (1 << 2), /* cmd msg q overflow */ INT_Q_AVAILABLE = (1 << 1), /* cmd msg q has free space */ INT_RESPONSE = (1 << 0), /* response msg available */ INT_ACK_MASK = INT_WATCHDOG | INT_Q_OVERFLOW, INT_DEF_MASK = INT_RESERVED | INT_Q_OVERFLOW | INT_RESPONSE, /* command messages, and related register bits */ CARM_HAVE_RESP = 0x01, CARM_MSG_READ = 1, CARM_MSG_WRITE = 2, CARM_MSG_VERIFY = 3, CARM_MSG_GET_CAPACITY = 4, CARM_MSG_FLUSH = 5, CARM_MSG_IOCTL = 6, CARM_MSG_ARRAY = 8, CARM_MSG_MISC = 9, CARM_CME = (1 << 2), CARM_RME = (1 << 1), CARM_WZBC = (1 << 0), CARM_RMI = (1 << 0), CARM_Q_FULL = (1 << 3), CARM_MSG_SIZE = 288, CARM_Q_LEN = 48, /* CARM_MSG_IOCTL messages */ CARM_IOC_SCAN_CHAN = 5, /* scan channels for devices */ CARM_IOC_GET_TCQ = 13, /* get tcq/ncq depth */ CARM_IOC_SET_TCQ = 14, /* set tcq/ncq depth */ IOC_SCAN_CHAN_NODEV = 0x1f, IOC_SCAN_CHAN_OFFSET = 0x40, /* CARM_MSG_ARRAY messages */ CARM_ARRAY_INFO = 0, ARRAY_NO_EXIST = (1 << 31), /* response messages */ RMSG_SZ = 8, /* sizeof(struct carm_response) */ RMSG_Q_LEN = 48, /* resp. msg list length */ RMSG_OK = 1, /* bit indicating msg was successful */ /* length of entire resp. msg buffer */ RBUF_LEN = RMSG_SZ * RMSG_Q_LEN, PDC_SHM_SIZE = (4096 << 7), /* length of entire h/w buffer */ /* CARM_MSG_MISC messages */ MISC_GET_FW_VER = 2, MISC_ALLOC_MEM = 3, MISC_SET_TIME = 5, /* MISC_GET_FW_VER feature bits */ FW_VER_4PORT = (1 << 2), /* 1=4 ports, 0=8 ports */ FW_VER_NON_RAID = (1 << 1), /* 1=non-RAID firmware, 0=RAID */ FW_VER_ZCR = (1 << 0), /* zero channel RAID (whatever that is) */ /* carm_host flags */ FL_NON_RAID = FW_VER_NON_RAID, FL_4PORT = FW_VER_4PORT, FL_FW_VER_MASK = (FW_VER_NON_RAID | FW_VER_4PORT), FL_DAC = (1 << 16), FL_DYN_MAJOR = (1 << 17), }; |
2d5a2ae52 drivers/block/sx8... |
200 201 202 |
enum { CARM_SG_BOUNDARY = 0xffffUL, /* s/g segment boundary */ }; |
1da177e4c Linux-2.6.12-rc2 |
203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 |
enum scatter_gather_types { SGT_32BIT = 0, SGT_64BIT = 1, }; enum host_states { HST_INVALID, /* invalid state; never used */ HST_ALLOC_BUF, /* setting up master SHM area */ HST_ERROR, /* we never leave here */ HST_PORT_SCAN, /* start dev scan */ HST_DEV_SCAN_START, /* start per-device probe */ HST_DEV_SCAN, /* continue per-device probe */ HST_DEV_ACTIVATE, /* activate devices we found */ HST_PROBE_FINISHED, /* probe is complete */ HST_PROBE_START, /* initiate probe */ HST_SYNC_TIME, /* tell firmware what time it is */ HST_GET_FW_VER, /* get firmware version, adapter port cnt */ }; #ifdef CARM_DEBUG static const char *state_name[] = { "HST_INVALID", "HST_ALLOC_BUF", "HST_ERROR", "HST_PORT_SCAN", "HST_DEV_SCAN_START", "HST_DEV_SCAN", "HST_DEV_ACTIVATE", "HST_PROBE_FINISHED", "HST_PROBE_START", "HST_SYNC_TIME", "HST_GET_FW_VER", }; #endif struct carm_port { unsigned int port_no; |
1da177e4c Linux-2.6.12-rc2 |
240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 |
struct gendisk *disk; struct carm_host *host; /* attached device characteristics */ u64 capacity; char name[41]; u16 dev_geom_head; u16 dev_geom_sect; u16 dev_geom_cyl; }; struct carm_request { unsigned int tag; int n_elem; unsigned int msg_type; unsigned int msg_subtype; unsigned int msg_bucket; struct request *rq; struct carm_port *port; struct scatterlist sg[CARM_MAX_REQ_SG]; }; struct carm_host { unsigned long flags; void __iomem *mmio; void *shm; dma_addr_t shm_dma; int major; int id; char name[32]; spinlock_t lock; struct pci_dev *pdev; unsigned int state; u32 fw_ver; |
165125e1e [BLOCK] Get rid o... |
276 |
struct request_queue *oob_q; |
1da177e4c Linux-2.6.12-rc2 |
277 278 279 280 281 282 283 284 |
unsigned int n_oob; unsigned int hw_sg_used; unsigned int resp_idx; unsigned int wait_q_prod; unsigned int wait_q_cons; |
165125e1e [BLOCK] Get rid o... |
285 |
struct request_queue *wait_q[CARM_MAX_WAIT_Q]; |
1da177e4c Linux-2.6.12-rc2 |
286 287 288 289 290 291 292 293 294 295 296 297 298 |
unsigned int n_msgs; u64 msg_alloc; struct carm_request req[CARM_MAX_REQ]; void *msg_base; dma_addr_t msg_dma; int cur_scan_dev; unsigned long dev_active; unsigned long dev_present; struct carm_port port[CARM_MAX_PORTS]; struct work_struct fsm_task; |
906c3b75f [PATCH] mutex sub... |
299 |
struct completion probe_comp; |
1da177e4c Linux-2.6.12-rc2 |
300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 |
}; struct carm_response { __le32 ret_handle; __le32 status; } __attribute__((packed)); struct carm_msg_sg { __le32 start; __le32 len; } __attribute__((packed)); struct carm_msg_rw { u8 type; u8 id; u8 sg_count; u8 sg_type; __le32 handle; __le32 lba; __le16 lba_count; __le16 lba_high; struct carm_msg_sg sg[32]; } __attribute__((packed)); struct carm_msg_allocbuf { u8 type; u8 subtype; u8 n_sg; u8 sg_type; __le32 handle; __le32 addr; __le32 len; __le32 evt_pool; __le32 n_evt; __le32 rbuf_pool; __le32 n_rbuf; __le32 msg_pool; __le32 n_msg; struct carm_msg_sg sg[8]; } __attribute__((packed)); struct carm_msg_ioctl { u8 type; u8 subtype; u8 array_id; u8 reserved1; __le32 handle; __le32 data_addr; u32 reserved2; } __attribute__((packed)); struct carm_msg_sync_time { u8 type; u8 subtype; u16 reserved1; __le32 handle; u32 reserved2; __le32 timestamp; } __attribute__((packed)); struct carm_msg_get_fw_ver { u8 type; u8 subtype; u16 reserved1; __le32 handle; __le32 data_addr; u32 reserved2; } __attribute__((packed)); struct carm_fw_ver { __le32 version; u8 features; u8 reserved1; u16 reserved2; } __attribute__((packed)); struct carm_array_info { __le32 size; __le16 size_hi; __le16 stripe_size; __le32 mode; __le16 stripe_blk_sz; __le16 reserved1; __le16 cyl; __le16 head; __le16 sect; u8 array_id; u8 reserved2; char name[40]; __le32 array_status; /* device list continues beyond this point? */ } __attribute__((packed)); static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent); static void carm_remove_one (struct pci_dev *pdev); |
a885c8c43 [PATCH] Add block... |
403 |
static int carm_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo); |
1da177e4c Linux-2.6.12-rc2 |
404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 |
static struct pci_device_id carm_pci_tbl[] = { { PCI_VENDOR_ID_PROMISE, 0x8000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, { PCI_VENDOR_ID_PROMISE, 0x8002, PCI_ANY_ID, PCI_ANY_ID, 0, 0, }, { } /* terminate list */ }; MODULE_DEVICE_TABLE(pci, carm_pci_tbl); static struct pci_driver carm_driver = { .name = DRV_NAME, .id_table = carm_pci_tbl, .probe = carm_init_one, .remove = carm_remove_one, }; static struct block_device_operations carm_bd_ops = { .owner = THIS_MODULE, |
a885c8c43 [PATCH] Add block... |
421 |
.getgeo = carm_bdev_getgeo, |
1da177e4c Linux-2.6.12-rc2 |
422 423 424 425 |
}; static unsigned int carm_host_id; static unsigned long carm_major_alloc; |
a885c8c43 [PATCH] Add block... |
426 |
static int carm_bdev_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4c Linux-2.6.12-rc2 |
427 |
{ |
a885c8c43 [PATCH] Add block... |
428 |
struct carm_port *port = bdev->bd_disk->private_data; |
1da177e4c Linux-2.6.12-rc2 |
429 |
|
a885c8c43 [PATCH] Add block... |
430 431 432 433 |
geo->heads = (u8) port->dev_geom_head; geo->sectors = (u8) port->dev_geom_sect; geo->cylinders = port->dev_geom_cyl; return 0; |
1da177e4c Linux-2.6.12-rc2 |
434 435 436 437 438 439 440 441 442 443 444 |
} static const u32 msg_sizes[] = { 32, 64, 128, CARM_MSG_SIZE }; static inline int carm_lookup_bucket(u32 msg_size) { int i; for (i = 0; i < ARRAY_SIZE(msg_sizes); i++) if (msg_size <= msg_sizes[i]) return i; |
2d5a2ae52 drivers/block/sx8... |
445 |
|
1da177e4c Linux-2.6.12-rc2 |
446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 |
return -ENOENT; } static void carm_init_buckets(void __iomem *mmio) { unsigned int i; for (i = 0; i < ARRAY_SIZE(msg_sizes); i++) writel(msg_sizes[i], mmio + CARM_CMS0 + (4 * i)); } static inline void *carm_ref_msg(struct carm_host *host, unsigned int msg_idx) { return host->msg_base + (msg_idx * CARM_MSG_SIZE); } static inline dma_addr_t carm_ref_msg_dma(struct carm_host *host, unsigned int msg_idx) { return host->msg_dma + (msg_idx * CARM_MSG_SIZE); } static int carm_send_msg(struct carm_host *host, struct carm_request *crq) { void __iomem *mmio = host->mmio; u32 msg = (u32) carm_ref_msg_dma(host, crq->tag); u32 cm_bucket = crq->msg_bucket; u32 tmp; int rc = 0; VPRINTK("ENTER "); tmp = readl(mmio + CARM_HMUC); if (tmp & CARM_Q_FULL) { #if 0 tmp = readl(mmio + CARM_INT_MASK); tmp |= INT_Q_AVAILABLE; writel(tmp, mmio + CARM_INT_MASK); readl(mmio + CARM_INT_MASK); /* flush */ #endif DPRINTK("host msg queue full "); rc = -EBUSY; } else { writel(msg | (cm_bucket << 1), mmio + CARM_IHQP); readl(mmio + CARM_IHQP); /* flush */ } return rc; } static struct carm_request *carm_get_request(struct carm_host *host) { unsigned int i; /* obey global hardware limit on S/G entries */ if (host->hw_sg_used >= (CARM_MAX_HOST_SG - CARM_MAX_REQ_SG)) return NULL; |
2d5a2ae52 drivers/block/sx8... |
507 |
for (i = 0; i < max_queue; i++) |
1da177e4c Linux-2.6.12-rc2 |
508 509 510 511 512 513 514 515 516 |
if ((host->msg_alloc & (1ULL << i)) == 0) { struct carm_request *crq = &host->req[i]; crq->port = NULL; crq->n_elem = 0; host->msg_alloc |= (1ULL << i); host->n_msgs++; assert(host->n_msgs <= CARM_MAX_REQ); |
45711f1af [SG] Update drive... |
517 |
sg_init_table(crq->sg, CARM_MAX_REQ_SG); |
1da177e4c Linux-2.6.12-rc2 |
518 519 |
return crq; } |
2d5a2ae52 drivers/block/sx8... |
520 |
|
1da177e4c Linux-2.6.12-rc2 |
521 522 523 524 525 526 527 |
DPRINTK("no request available, returning NULL "); return NULL; } static int carm_put_request(struct carm_host *host, struct carm_request *crq) { |
2d5a2ae52 drivers/block/sx8... |
528 |
assert(crq->tag < max_queue); |
1da177e4c Linux-2.6.12-rc2 |
529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 |
if (unlikely((host->msg_alloc & (1ULL << crq->tag)) == 0)) return -EINVAL; /* tried to clear a tag that was not active */ assert(host->hw_sg_used >= crq->n_elem); host->msg_alloc &= ~(1ULL << crq->tag); host->hw_sg_used -= crq->n_elem; host->n_msgs--; return 0; } static struct carm_request *carm_get_special(struct carm_host *host) { unsigned long flags; struct carm_request *crq = NULL; struct request *rq; int tries = 5000; while (tries-- > 0) { spin_lock_irqsave(&host->lock, flags); crq = carm_get_request(host); spin_unlock_irqrestore(&host->lock, flags); if (crq) break; msleep(10); } if (!crq) return NULL; rq = blk_get_request(host->oob_q, WRITE /* bogus */, GFP_KERNEL); if (!rq) { spin_lock_irqsave(&host->lock, flags); carm_put_request(host, crq); spin_unlock_irqrestore(&host->lock, flags); return NULL; } crq->rq = rq; return crq; } static int carm_array_info (struct carm_host *host, unsigned int array_idx) { struct carm_msg_ioctl *ioc; unsigned int idx; u32 msg_data; dma_addr_t msg_dma; struct carm_request *crq; int rc; crq = carm_get_special(host); if (!crq) { rc = -ENOMEM; goto err_out; } idx = crq->tag; ioc = carm_ref_msg(host, idx); msg_dma = carm_ref_msg_dma(host, idx); msg_data = (u32) (msg_dma + sizeof(struct carm_array_info)); crq->msg_type = CARM_MSG_ARRAY; crq->msg_subtype = CARM_ARRAY_INFO; rc = carm_lookup_bucket(sizeof(struct carm_msg_ioctl) + sizeof(struct carm_array_info)); BUG_ON(rc < 0); crq->msg_bucket = (u32) rc; memset(ioc, 0, sizeof(*ioc)); ioc->type = CARM_MSG_ARRAY; ioc->subtype = CARM_ARRAY_INFO; ioc->array_id = (u8) array_idx; ioc->handle = cpu_to_le32(TAG_ENCODE(idx)); ioc->data_addr = cpu_to_le32(msg_data); spin_lock_irq(&host->lock); assert(host->state == HST_DEV_SCAN_START || host->state == HST_DEV_SCAN); spin_unlock_irq(&host->lock); DPRINTK("blk_insert_request, tag == %u ", idx); |
867d1191f [SCSI] remove req... |
616 |
blk_insert_request(host->oob_q, crq->rq, 1, crq); |
1da177e4c Linux-2.6.12-rc2 |
617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 |
return 0; err_out: spin_lock_irq(&host->lock); host->state = HST_ERROR; spin_unlock_irq(&host->lock); return rc; } typedef unsigned int (*carm_sspc_t)(struct carm_host *, unsigned int, void *); static int carm_send_special (struct carm_host *host, carm_sspc_t func) { struct carm_request *crq; struct carm_msg_ioctl *ioc; void *mem; unsigned int idx, msg_size; int rc; crq = carm_get_special(host); if (!crq) return -ENOMEM; idx = crq->tag; mem = carm_ref_msg(host, idx); msg_size = func(host, idx, mem); ioc = mem; crq->msg_type = ioc->type; crq->msg_subtype = ioc->subtype; rc = carm_lookup_bucket(msg_size); BUG_ON(rc < 0); crq->msg_bucket = (u32) rc; DPRINTK("blk_insert_request, tag == %u ", idx); |
867d1191f [SCSI] remove req... |
656 |
blk_insert_request(host->oob_q, crq->rq, 1, crq); |
1da177e4c Linux-2.6.12-rc2 |
657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 |
return 0; } static unsigned int carm_fill_sync_time(struct carm_host *host, unsigned int idx, void *mem) { struct timeval tv; struct carm_msg_sync_time *st = mem; do_gettimeofday(&tv); memset(st, 0, sizeof(*st)); st->type = CARM_MSG_MISC; st->subtype = MISC_SET_TIME; st->handle = cpu_to_le32(TAG_ENCODE(idx)); st->timestamp = cpu_to_le32(tv.tv_sec); return sizeof(struct carm_msg_sync_time); } static unsigned int carm_fill_alloc_buf(struct carm_host *host, unsigned int idx, void *mem) { struct carm_msg_allocbuf *ab = mem; memset(ab, 0, sizeof(*ab)); ab->type = CARM_MSG_MISC; ab->subtype = MISC_ALLOC_MEM; ab->handle = cpu_to_le32(TAG_ENCODE(idx)); ab->n_sg = 1; ab->sg_type = SGT_32BIT; ab->addr = cpu_to_le32(host->shm_dma + (PDC_SHM_SIZE >> 1)); ab->len = cpu_to_le32(PDC_SHM_SIZE >> 1); ab->evt_pool = cpu_to_le32(host->shm_dma + (16 * 1024)); ab->n_evt = cpu_to_le32(1024); ab->rbuf_pool = cpu_to_le32(host->shm_dma); ab->n_rbuf = cpu_to_le32(RMSG_Q_LEN); ab->msg_pool = cpu_to_le32(host->shm_dma + RBUF_LEN); ab->n_msg = cpu_to_le32(CARM_Q_LEN); ab->sg[0].start = cpu_to_le32(host->shm_dma + (PDC_SHM_SIZE >> 1)); ab->sg[0].len = cpu_to_le32(65536); return sizeof(struct carm_msg_allocbuf); } static unsigned int carm_fill_scan_channels(struct carm_host *host, unsigned int idx, void *mem) { struct carm_msg_ioctl *ioc = mem; u32 msg_data = (u32) (carm_ref_msg_dma(host, idx) + IOC_SCAN_CHAN_OFFSET); memset(ioc, 0, sizeof(*ioc)); ioc->type = CARM_MSG_IOCTL; ioc->subtype = CARM_IOC_SCAN_CHAN; ioc->handle = cpu_to_le32(TAG_ENCODE(idx)); ioc->data_addr = cpu_to_le32(msg_data); /* fill output data area with "no device" default values */ mem += IOC_SCAN_CHAN_OFFSET; memset(mem, IOC_SCAN_CHAN_NODEV, CARM_MAX_PORTS); return IOC_SCAN_CHAN_OFFSET + CARM_MAX_PORTS; } static unsigned int carm_fill_get_fw_ver(struct carm_host *host, unsigned int idx, void *mem) { struct carm_msg_get_fw_ver *ioc = mem; u32 msg_data = (u32) (carm_ref_msg_dma(host, idx) + sizeof(*ioc)); memset(ioc, 0, sizeof(*ioc)); ioc->type = CARM_MSG_MISC; ioc->subtype = MISC_GET_FW_VER; ioc->handle = cpu_to_le32(TAG_ENCODE(idx)); ioc->data_addr = cpu_to_le32(msg_data); return sizeof(struct carm_msg_get_fw_ver) + sizeof(struct carm_fw_ver); } static inline void carm_end_request_queued(struct carm_host *host, struct carm_request *crq, |
a9c73d05f blk_end_request: ... |
741 |
int error) |
1da177e4c Linux-2.6.12-rc2 |
742 743 744 |
{ struct request *req = crq->rq; int rc; |
a9c73d05f blk_end_request: ... |
745 |
rc = __blk_end_request(req, error, blk_rq_bytes(req)); |
1da177e4c Linux-2.6.12-rc2 |
746 |
assert(rc == 0); |
1da177e4c Linux-2.6.12-rc2 |
747 748 749 |
rc = carm_put_request(host, crq); assert(rc == 0); } |
165125e1e [BLOCK] Get rid o... |
750 |
static inline void carm_push_q (struct carm_host *host, struct request_queue *q) |
1da177e4c Linux-2.6.12-rc2 |
751 752 753 754 755 756 757 758 759 760 761 |
{ unsigned int idx = host->wait_q_prod % CARM_MAX_WAIT_Q; blk_stop_queue(q); VPRINTK("STOPPED QUEUE %p ", q); host->wait_q[idx] = q; host->wait_q_prod++; BUG_ON(host->wait_q_prod == host->wait_q_cons); /* overrun */ } |
165125e1e [BLOCK] Get rid o... |
762 |
static inline struct request_queue *carm_pop_q(struct carm_host *host) |
1da177e4c Linux-2.6.12-rc2 |
763 764 765 766 767 768 769 770 771 772 773 774 775 776 |
{ unsigned int idx; if (host->wait_q_prod == host->wait_q_cons) return NULL; idx = host->wait_q_cons % CARM_MAX_WAIT_Q; host->wait_q_cons++; return host->wait_q[idx]; } static inline void carm_round_robin(struct carm_host *host) { |
165125e1e [BLOCK] Get rid o... |
777 |
struct request_queue *q = carm_pop_q(host); |
1da177e4c Linux-2.6.12-rc2 |
778 779 780 781 782 783 784 785 |
if (q) { blk_start_queue(q); VPRINTK("STARTED QUEUE %p ", q); } } static inline void carm_end_rq(struct carm_host *host, struct carm_request *crq, |
a9c73d05f blk_end_request: ... |
786 |
int error) |
1da177e4c Linux-2.6.12-rc2 |
787 |
{ |
a9c73d05f blk_end_request: ... |
788 |
carm_end_request_queued(host, crq, error); |
2d5a2ae52 drivers/block/sx8... |
789 |
if (max_queue == 1) |
1da177e4c Linux-2.6.12-rc2 |
790 791 792 793 794 795 |
carm_round_robin(host); else if ((host->n_msgs <= CARM_MSG_LOW_WATER) && (host->hw_sg_used <= CARM_SG_LOW_WATER)) { carm_round_robin(host); } } |
165125e1e [BLOCK] Get rid o... |
796 |
static void carm_oob_rq_fn(struct request_queue *q) |
1da177e4c Linux-2.6.12-rc2 |
797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 |
{ struct carm_host *host = q->queuedata; struct carm_request *crq; struct request *rq; int rc; while (1) { DPRINTK("get req "); rq = elv_next_request(q); if (!rq) break; blkdev_dequeue_request(rq); crq = rq->special; assert(crq != NULL); assert(crq->rq == rq); crq->n_elem = 0; DPRINTK("send req "); rc = carm_send_msg(host, crq); if (rc) { blk_requeue_request(q, rq); carm_push_q(host, q); return; /* call us again later, eventually */ } } } |
165125e1e [BLOCK] Get rid o... |
828 |
static void carm_rq_fn(struct request_queue *q) |
1da177e4c Linux-2.6.12-rc2 |
829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 |
{ struct carm_port *port = q->queuedata; struct carm_host *host = port->host; struct carm_msg_rw *msg; struct carm_request *crq; struct request *rq; struct scatterlist *sg; int writing = 0, pci_dir, i, n_elem, rc; u32 tmp; unsigned int msg_size; queue_one_request: VPRINTK("get req "); rq = elv_next_request(q); if (!rq) return; crq = carm_get_request(host); if (!crq) { carm_push_q(host, q); return; /* call us again later, eventually */ } crq->rq = rq; blkdev_dequeue_request(rq); if (rq_data_dir(rq) == WRITE) { writing = 1; pci_dir = PCI_DMA_TODEVICE; } else { pci_dir = PCI_DMA_FROMDEVICE; } /* get scatterlist from block layer */ sg = &crq->sg[0]; n_elem = blk_rq_map_sg(q, rq, sg); if (n_elem <= 0) { |
a9c73d05f blk_end_request: ... |
867 |
carm_end_rq(host, crq, -EIO); |
1da177e4c Linux-2.6.12-rc2 |
868 869 870 871 872 873 |
return; /* request with no s/g entries? */ } /* map scatterlist to PCI bus addresses */ n_elem = pci_map_sg(host->pdev, sg, n_elem, pci_dir); if (n_elem <= 0) { |
a9c73d05f blk_end_request: ... |
874 |
carm_end_rq(host, crq, -EIO); |
1da177e4c Linux-2.6.12-rc2 |
875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 |
return; /* request with no s/g entries? */ } crq->n_elem = n_elem; crq->port = port; host->hw_sg_used += n_elem; /* * build read/write message */ VPRINTK("build msg "); msg = (struct carm_msg_rw *) carm_ref_msg(host, crq->tag); if (writing) { msg->type = CARM_MSG_WRITE; crq->msg_type = CARM_MSG_WRITE; } else { msg->type = CARM_MSG_READ; crq->msg_type = CARM_MSG_READ; } msg->id = port->port_no; msg->sg_count = n_elem; msg->sg_type = SGT_32BIT; msg->handle = cpu_to_le32(TAG_ENCODE(crq->tag)); msg->lba = cpu_to_le32(rq->sector & 0xffffffff); tmp = (rq->sector >> 16) >> 16; msg->lba_high = cpu_to_le16( (u16) tmp ); msg->lba_count = cpu_to_le16(rq->nr_sectors); msg_size = sizeof(struct carm_msg_rw) - sizeof(msg->sg); for (i = 0; i < n_elem; i++) { struct carm_msg_sg *carm_sg = &msg->sg[i]; carm_sg->start = cpu_to_le32(sg_dma_address(&crq->sg[i])); carm_sg->len = cpu_to_le32(sg_dma_len(&crq->sg[i])); msg_size += sizeof(struct carm_msg_sg); } rc = carm_lookup_bucket(msg_size); BUG_ON(rc < 0); crq->msg_bucket = (u32) rc; /* * queue read/write message to hardware */ VPRINTK("send msg, tag == %u ", crq->tag); rc = carm_send_msg(host, crq); if (rc) { carm_put_request(host, crq); blk_requeue_request(q, rq); carm_push_q(host, q); return; /* call us again later, eventually */ } goto queue_one_request; } static void carm_handle_array_info(struct carm_host *host, struct carm_request *crq, u8 *mem, |
a9c73d05f blk_end_request: ... |
937 |
int error) |
1da177e4c Linux-2.6.12-rc2 |
938 939 940 941 942 943 944 945 946 947 |
{ struct carm_port *port; u8 *msg_data = mem + sizeof(struct carm_array_info); struct carm_array_info *desc = (struct carm_array_info *) msg_data; u64 lo, hi; int cur_port; size_t slen; DPRINTK("ENTER "); |
a9c73d05f blk_end_request: ... |
948 |
carm_end_rq(host, crq, error); |
1da177e4c Linux-2.6.12-rc2 |
949 |
|
a9c73d05f blk_end_request: ... |
950 |
if (error) |
1da177e4c Linux-2.6.12-rc2 |
951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 |
goto out; if (le32_to_cpu(desc->array_status) & ARRAY_NO_EXIST) goto out; cur_port = host->cur_scan_dev; /* should never occur */ if ((cur_port < 0) || (cur_port >= CARM_MAX_PORTS)) { printk(KERN_ERR PFX "BUG: cur_scan_dev==%d, array_id==%d ", cur_port, (int) desc->array_id); goto out; } port = &host->port[cur_port]; lo = (u64) le32_to_cpu(desc->size); hi = (u64) le16_to_cpu(desc->size_hi); port->capacity = lo | (hi << 32); port->dev_geom_head = le16_to_cpu(desc->head); port->dev_geom_sect = le16_to_cpu(desc->sect); port->dev_geom_cyl = le16_to_cpu(desc->cyl); host->dev_active |= (1 << cur_port); strncpy(port->name, desc->name, sizeof(port->name)); port->name[sizeof(port->name) - 1] = 0; slen = strlen(port->name); while (slen && (port->name[slen - 1] == ' ')) { port->name[slen - 1] = 0; slen--; } printk(KERN_INFO DRV_NAME "(%s): port %u device %Lu sectors ", pci_name(host->pdev), port->port_no, (unsigned long long) port->capacity); printk(KERN_INFO DRV_NAME "(%s): port %u device \"%s\" ", pci_name(host->pdev), port->port_no, port->name); out: assert(host->state == HST_DEV_SCAN); schedule_work(&host->fsm_task); } static void carm_handle_scan_chan(struct carm_host *host, struct carm_request *crq, u8 *mem, |
a9c73d05f blk_end_request: ... |
1000 |
int error) |
1da177e4c Linux-2.6.12-rc2 |
1001 1002 1003 1004 1005 1006 1007 |
{ u8 *msg_data = mem + IOC_SCAN_CHAN_OFFSET; unsigned int i, dev_count = 0; int new_state = HST_DEV_SCAN_START; DPRINTK("ENTER "); |
a9c73d05f blk_end_request: ... |
1008 |
carm_end_rq(host, crq, error); |
1da177e4c Linux-2.6.12-rc2 |
1009 |
|
a9c73d05f blk_end_request: ... |
1010 |
if (error) { |
1da177e4c Linux-2.6.12-rc2 |
1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 |
new_state = HST_ERROR; goto out; } /* TODO: scan and support non-disk devices */ for (i = 0; i < 8; i++) if (msg_data[i] == 0) { /* direct-access device (disk) */ host->dev_present |= (1 << i); dev_count++; } printk(KERN_INFO DRV_NAME "(%s): found %u interesting devices ", pci_name(host->pdev), dev_count); out: assert(host->state == HST_PORT_SCAN); host->state = new_state; schedule_work(&host->fsm_task); } static void carm_handle_generic(struct carm_host *host, |
a9c73d05f blk_end_request: ... |
1033 |
struct carm_request *crq, int error, |
1da177e4c Linux-2.6.12-rc2 |
1034 1035 1036 1037 |
int cur_state, int next_state) { DPRINTK("ENTER "); |
a9c73d05f blk_end_request: ... |
1038 |
carm_end_rq(host, crq, error); |
1da177e4c Linux-2.6.12-rc2 |
1039 1040 |
assert(host->state == cur_state); |
a9c73d05f blk_end_request: ... |
1041 |
if (error) |
1da177e4c Linux-2.6.12-rc2 |
1042 |
host->state = HST_ERROR; |
a9c73d05f blk_end_request: ... |
1043 1044 |
else host->state = next_state; |
1da177e4c Linux-2.6.12-rc2 |
1045 1046 1047 1048 |
schedule_work(&host->fsm_task); } static inline void carm_handle_rw(struct carm_host *host, |
a9c73d05f blk_end_request: ... |
1049 |
struct carm_request *crq, int error) |
1da177e4c Linux-2.6.12-rc2 |
1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 |
{ int pci_dir; VPRINTK("ENTER "); if (rq_data_dir(crq->rq) == WRITE) pci_dir = PCI_DMA_TODEVICE; else pci_dir = PCI_DMA_FROMDEVICE; pci_unmap_sg(host->pdev, &crq->sg[0], crq->n_elem, pci_dir); |
a9c73d05f blk_end_request: ... |
1062 |
carm_end_rq(host, crq, error); |
1da177e4c Linux-2.6.12-rc2 |
1063 1064 1065 1066 1067 1068 1069 1070 |
} static inline void carm_handle_resp(struct carm_host *host, __le32 ret_handle_le, u32 status) { u32 handle = le32_to_cpu(ret_handle_le); unsigned int msg_idx; struct carm_request *crq; |
a9c73d05f blk_end_request: ... |
1071 |
int error = (status == RMSG_OK) ? 0 : -EIO; |
1da177e4c Linux-2.6.12-rc2 |
1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 |
u8 *mem; VPRINTK("ENTER, handle == 0x%x ", handle); if (unlikely(!TAG_VALID(handle))) { printk(KERN_ERR DRV_NAME "(%s): BUG: invalid tag 0x%x ", pci_name(host->pdev), handle); return; } msg_idx = TAG_DECODE(handle); VPRINTK("tag == %u ", msg_idx); crq = &host->req[msg_idx]; /* fast path */ if (likely(crq->msg_type == CARM_MSG_READ || crq->msg_type == CARM_MSG_WRITE)) { |
a9c73d05f blk_end_request: ... |
1093 |
carm_handle_rw(host, crq, error); |
1da177e4c Linux-2.6.12-rc2 |
1094 1095 1096 1097 1098 1099 1100 1101 1102 |
return; } mem = carm_ref_msg(host, msg_idx); switch (crq->msg_type) { case CARM_MSG_IOCTL: { switch (crq->msg_subtype) { case CARM_IOC_SCAN_CHAN: |
a9c73d05f blk_end_request: ... |
1103 |
carm_handle_scan_chan(host, crq, mem, error); |
1da177e4c Linux-2.6.12-rc2 |
1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 |
break; default: /* unknown / invalid response */ goto err_out; } break; } case CARM_MSG_MISC: { switch (crq->msg_subtype) { case MISC_ALLOC_MEM: |
a9c73d05f blk_end_request: ... |
1115 |
carm_handle_generic(host, crq, error, |
1da177e4c Linux-2.6.12-rc2 |
1116 1117 1118 |
HST_ALLOC_BUF, HST_SYNC_TIME); break; case MISC_SET_TIME: |
a9c73d05f blk_end_request: ... |
1119 |
carm_handle_generic(host, crq, error, |
1da177e4c Linux-2.6.12-rc2 |
1120 1121 1122 1123 1124 |
HST_SYNC_TIME, HST_GET_FW_VER); break; case MISC_GET_FW_VER: { struct carm_fw_ver *ver = (struct carm_fw_ver *) mem + sizeof(struct carm_msg_get_fw_ver); |
a9c73d05f blk_end_request: ... |
1125 |
if (!error) { |
1da177e4c Linux-2.6.12-rc2 |
1126 1127 1128 |
host->fw_ver = le32_to_cpu(ver->version); host->flags |= (ver->features & FL_FW_VER_MASK); } |
a9c73d05f blk_end_request: ... |
1129 |
carm_handle_generic(host, crq, error, |
1da177e4c Linux-2.6.12-rc2 |
1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 |
HST_GET_FW_VER, HST_PORT_SCAN); break; } default: /* unknown / invalid response */ goto err_out; } break; } case CARM_MSG_ARRAY: { switch (crq->msg_subtype) { case CARM_ARRAY_INFO: |
a9c73d05f blk_end_request: ... |
1143 |
carm_handle_array_info(host, crq, mem, error); |
1da177e4c Linux-2.6.12-rc2 |
1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 |
break; default: /* unknown / invalid response */ goto err_out; } break; } default: /* unknown / invalid response */ goto err_out; } return; err_out: printk(KERN_WARNING DRV_NAME "(%s): BUG: unhandled message type %d/%d ", pci_name(host->pdev), crq->msg_type, crq->msg_subtype); |
a9c73d05f blk_end_request: ... |
1163 |
carm_end_rq(host, crq, -EIO); |
1da177e4c Linux-2.6.12-rc2 |
1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 |
} static inline void carm_handle_responses(struct carm_host *host) { void __iomem *mmio = host->mmio; struct carm_response *resp = (struct carm_response *) host->shm; unsigned int work = 0; unsigned int idx = host->resp_idx % RMSG_Q_LEN; while (1) { u32 status = le32_to_cpu(resp[idx].status); if (status == 0xffffffff) { VPRINTK("ending response on index %u ", idx); writel(idx << 3, mmio + CARM_RESP_IDX); break; } /* response to a message we sent */ else if ((status & (1 << 31)) == 0) { VPRINTK("handling msg response on index %u ", idx); carm_handle_resp(host, resp[idx].ret_handle, status); resp[idx].status = cpu_to_le32(0xffffffff); } /* asynchronous events the hardware throws our way */ else if ((status & 0xff000000) == (1 << 31)) { u8 *evt_type_ptr = (u8 *) &resp[idx]; u8 evt_type = *evt_type_ptr; printk(KERN_WARNING DRV_NAME "(%s): unhandled event type %d ", pci_name(host->pdev), (int) evt_type); resp[idx].status = cpu_to_le32(0xffffffff); } idx = NEXT_RESP(idx); work++; } VPRINTK("EXIT, work==%u ", work); host->resp_idx += work; } |
7d12e780e IRQ: Maintain reg... |
1209 |
static irqreturn_t carm_interrupt(int irq, void *__host) |
1da177e4c Linux-2.6.12-rc2 |
1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 |
{ struct carm_host *host = __host; void __iomem *mmio; u32 mask; int handled = 0; unsigned long flags; if (!host) { VPRINTK("no host "); return IRQ_NONE; } spin_lock_irqsave(&host->lock, flags); mmio = host->mmio; /* reading should also clear interrupts */ mask = readl(mmio + CARM_INT_STAT); if (mask == 0 || mask == 0xffffffff) { VPRINTK("no work, mask == 0x%x ", mask); goto out; } if (mask & INT_ACK_MASK) writel(mask, mmio + CARM_INT_STAT); if (unlikely(host->state == HST_INVALID)) { VPRINTK("not initialized yet, mask = 0x%x ", mask); goto out; } if (mask & CARM_HAVE_RESP) { handled = 1; carm_handle_responses(host); } out: spin_unlock_irqrestore(&host->lock, flags); VPRINTK("EXIT "); return IRQ_RETVAL(handled); } |
c4028958b WorkStruct: make ... |
1256 |
static void carm_fsm_task (struct work_struct *work) |
1da177e4c Linux-2.6.12-rc2 |
1257 |
{ |
c4028958b WorkStruct: make ... |
1258 1259 |
struct carm_host *host = container_of(work, struct carm_host, fsm_task); |
1da177e4c Linux-2.6.12-rc2 |
1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 |
unsigned long flags; unsigned int state; int rc, i, next_dev; int reschedule = 0; int new_state = HST_INVALID; spin_lock_irqsave(&host->lock, flags); state = host->state; spin_unlock_irqrestore(&host->lock, flags); DPRINTK("ENTER, state == %s ", state_name[state]); switch (state) { case HST_PROBE_START: new_state = HST_ALLOC_BUF; reschedule = 1; break; case HST_ALLOC_BUF: rc = carm_send_special(host, carm_fill_alloc_buf); if (rc) { new_state = HST_ERROR; reschedule = 1; } break; case HST_SYNC_TIME: rc = carm_send_special(host, carm_fill_sync_time); if (rc) { new_state = HST_ERROR; reschedule = 1; } break; case HST_GET_FW_VER: rc = carm_send_special(host, carm_fill_get_fw_ver); if (rc) { new_state = HST_ERROR; reschedule = 1; } break; case HST_PORT_SCAN: rc = carm_send_special(host, carm_fill_scan_channels); if (rc) { new_state = HST_ERROR; reschedule = 1; } break; case HST_DEV_SCAN_START: host->cur_scan_dev = -1; new_state = HST_DEV_SCAN; reschedule = 1; break; case HST_DEV_SCAN: next_dev = -1; for (i = host->cur_scan_dev + 1; i < CARM_MAX_PORTS; i++) if (host->dev_present & (1 << i)) { next_dev = i; break; } if (next_dev >= 0) { host->cur_scan_dev = next_dev; rc = carm_array_info(host, next_dev); if (rc) { new_state = HST_ERROR; reschedule = 1; } } else { new_state = HST_DEV_ACTIVATE; reschedule = 1; } break; case HST_DEV_ACTIVATE: { int activated = 0; for (i = 0; i < CARM_MAX_PORTS; i++) if (host->dev_active & (1 << i)) { struct carm_port *port = &host->port[i]; struct gendisk *disk = port->disk; set_capacity(disk, port->capacity); add_disk(disk); activated++; } printk(KERN_INFO DRV_NAME "(%s): %d ports activated ", pci_name(host->pdev), activated); new_state = HST_PROBE_FINISHED; reschedule = 1; break; } case HST_PROBE_FINISHED: |
906c3b75f [PATCH] mutex sub... |
1360 |
complete(&host->probe_comp); |
1da177e4c Linux-2.6.12-rc2 |
1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 |
break; case HST_ERROR: /* FIXME: TODO */ break; default: /* should never occur */ printk(KERN_ERR PFX "BUG: unknown state %d ", state); assert(0); break; } if (new_state != HST_INVALID) { spin_lock_irqsave(&host->lock, flags); host->state = new_state; spin_unlock_irqrestore(&host->lock, flags); } if (reschedule) schedule_work(&host->fsm_task); } static int carm_init_wait(void __iomem *mmio, u32 bits, unsigned int test_bit) { unsigned int i; for (i = 0; i < 50000; i++) { u32 tmp = readl(mmio + CARM_LMUC); udelay(100); if (test_bit) { if ((tmp & bits) == bits) return 0; } else { if ((tmp & bits) == 0) return 0; } cond_resched(); } printk(KERN_ERR PFX "carm_init_wait timeout, bits == 0x%x, test_bit == %s ", bits, test_bit ? "yes" : "no"); return -EBUSY; } static void carm_init_responses(struct carm_host *host) { void __iomem *mmio = host->mmio; unsigned int i; struct carm_response *resp = (struct carm_response *) host->shm; for (i = 0; i < RMSG_Q_LEN; i++) resp[i].status = cpu_to_le32(0xffffffff); writel(0, mmio + CARM_RESP_IDX); } static int carm_init_host(struct carm_host *host) { void __iomem *mmio = host->mmio; u32 tmp; u8 tmp8; int rc; DPRINTK("ENTER "); writel(0, mmio + CARM_INT_MASK); tmp8 = readb(mmio + CARM_INITC); if (tmp8 & 0x01) { tmp8 &= ~0x01; writeb(tmp8, mmio + CARM_INITC); readb(mmio + CARM_INITC); /* flush */ DPRINTK("snooze... "); msleep(5000); } tmp = readl(mmio + CARM_HMUC); if (tmp & CARM_CME) { DPRINTK("CME bit present, waiting "); rc = carm_init_wait(mmio, CARM_CME, 1); if (rc) { DPRINTK("EXIT, carm_init_wait 1 failed "); return rc; } } if (tmp & CARM_RME) { DPRINTK("RME bit present, waiting "); rc = carm_init_wait(mmio, CARM_RME, 1); if (rc) { DPRINTK("EXIT, carm_init_wait 2 failed "); return rc; } } tmp &= ~(CARM_RME | CARM_CME); writel(tmp, mmio + CARM_HMUC); readl(mmio + CARM_HMUC); /* flush */ rc = carm_init_wait(mmio, CARM_RME | CARM_CME, 0); if (rc) { DPRINTK("EXIT, carm_init_wait 3 failed "); return rc; } carm_init_buckets(mmio); writel(host->shm_dma & 0xffffffff, mmio + RBUF_ADDR_LO); writel((host->shm_dma >> 16) >> 16, mmio + RBUF_ADDR_HI); writel(RBUF_LEN, mmio + RBUF_BYTE_SZ); tmp = readl(mmio + CARM_HMUC); tmp |= (CARM_RME | CARM_CME | CARM_WZBC); writel(tmp, mmio + CARM_HMUC); readl(mmio + CARM_HMUC); /* flush */ rc = carm_init_wait(mmio, CARM_RME | CARM_CME, 1); if (rc) { DPRINTK("EXIT, carm_init_wait 4 failed "); return rc; } writel(0, mmio + CARM_HMPHA); writel(INT_DEF_MASK, mmio + CARM_INT_MASK); carm_init_responses(host); /* start initialization, probing state machine */ spin_lock_irq(&host->lock); assert(host->state == HST_INVALID); host->state = HST_PROBE_START; spin_unlock_irq(&host->lock); schedule_work(&host->fsm_task); DPRINTK("EXIT "); return 0; } static int carm_init_disks(struct carm_host *host) { unsigned int i; int rc = 0; for (i = 0; i < CARM_MAX_PORTS; i++) { struct gendisk *disk; |
165125e1e [BLOCK] Get rid o... |
1519 |
struct request_queue *q; |
1da177e4c Linux-2.6.12-rc2 |
1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 |
struct carm_port *port; port = &host->port[i]; port->host = host; port->port_no = i; disk = alloc_disk(CARM_MINORS_PER_MAJOR); if (!disk) { rc = -ENOMEM; break; } port->disk = disk; sprintf(disk->disk_name, DRV_NAME "/%u", (unsigned int) (host->id * CARM_MAX_PORTS) + i); |
1da177e4c Linux-2.6.12-rc2 |
1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 |
disk->major = host->major; disk->first_minor = i * CARM_MINORS_PER_MAJOR; disk->fops = &carm_bd_ops; disk->private_data = port; q = blk_init_queue(carm_rq_fn, &host->lock); if (!q) { rc = -ENOMEM; break; } disk->queue = q; blk_queue_max_hw_segments(q, CARM_MAX_REQ_SG); blk_queue_max_phys_segments(q, CARM_MAX_REQ_SG); blk_queue_segment_boundary(q, CARM_SG_BOUNDARY); q->queuedata = port; } return rc; } static void carm_free_disks(struct carm_host *host) { unsigned int i; for (i = 0; i < CARM_MAX_PORTS; i++) { struct gendisk *disk = host->port[i].disk; if (disk) { |
165125e1e [BLOCK] Get rid o... |
1563 |
struct request_queue *q = disk->queue; |
1da177e4c Linux-2.6.12-rc2 |
1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 |
if (disk->flags & GENHD_FL_UP) del_gendisk(disk); if (q) blk_cleanup_queue(q); put_disk(disk); } } } static int carm_init_shm(struct carm_host *host) { host->shm = pci_alloc_consistent(host->pdev, CARM_SHM_SIZE, &host->shm_dma); if (!host->shm) return -ENOMEM; host->msg_base = host->shm + RBUF_LEN; host->msg_dma = host->shm_dma + RBUF_LEN; memset(host->shm, 0xff, RBUF_LEN); memset(host->msg_base, 0, PDC_SHM_SIZE - RBUF_LEN); return 0; } static int carm_init_one (struct pci_dev *pdev, const struct pci_device_id *ent) { static unsigned int printed_version; struct carm_host *host; unsigned int pci_dac; int rc; |
165125e1e [BLOCK] Get rid o... |
1596 |
struct request_queue *q; |
1da177e4c Linux-2.6.12-rc2 |
1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 |
unsigned int i; if (!printed_version++) printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION " "); rc = pci_enable_device(pdev); if (rc) return rc; rc = pci_request_regions(pdev, DRV_NAME); if (rc) goto err_out; |
44456d37b [PATCH] turn many... |
1610 |
#ifdef IF_64BIT_DMA_IS_POSSIBLE /* grrrr... */ |
a3948663e [PATCH] drivers/b... |
1611 |
rc = pci_set_dma_mask(pdev, DMA_64BIT_MASK); |
1da177e4c Linux-2.6.12-rc2 |
1612 |
if (!rc) { |
a3948663e [PATCH] drivers/b... |
1613 |
rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK); |
1da177e4c Linux-2.6.12-rc2 |
1614 1615 1616 1617 1618 1619 1620 1621 1622 |
if (rc) { printk(KERN_ERR DRV_NAME "(%s): consistent DMA mask failure ", pci_name(pdev)); goto err_out_regions; } pci_dac = 1; } else { #endif |
a3948663e [PATCH] drivers/b... |
1623 |
rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK); |
1da177e4c Linux-2.6.12-rc2 |
1624 1625 1626 1627 1628 1629 1630 |
if (rc) { printk(KERN_ERR DRV_NAME "(%s): DMA mask failure ", pci_name(pdev)); goto err_out_regions; } pci_dac = 0; |
44456d37b [PATCH] turn many... |
1631 |
#ifdef IF_64BIT_DMA_IS_POSSIBLE /* grrrr... */ |
1da177e4c Linux-2.6.12-rc2 |
1632 1633 |
} #endif |
dd00cc486 some kmalloc/mems... |
1634 |
host = kzalloc(sizeof(*host), GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
1635 1636 1637 1638 1639 1640 1641 |
if (!host) { printk(KERN_ERR DRV_NAME "(%s): memory alloc failure ", pci_name(pdev)); rc = -ENOMEM; goto err_out_regions; } |
1da177e4c Linux-2.6.12-rc2 |
1642 1643 1644 |
host->pdev = pdev; host->flags = pci_dac ? FL_DAC : 0; spin_lock_init(&host->lock); |
c4028958b WorkStruct: make ... |
1645 |
INIT_WORK(&host->fsm_task, carm_fsm_task); |
906c3b75f [PATCH] mutex sub... |
1646 |
init_completion(&host->probe_comp); |
1da177e4c Linux-2.6.12-rc2 |
1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 |
for (i = 0; i < ARRAY_SIZE(host->req); i++) host->req[i].tag = i; host->mmio = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); if (!host->mmio) { printk(KERN_ERR DRV_NAME "(%s): MMIO alloc failure ", pci_name(pdev)); rc = -ENOMEM; goto err_out_kfree; } rc = carm_init_shm(host); if (rc) { printk(KERN_ERR DRV_NAME "(%s): DMA SHM alloc failure ", pci_name(pdev)); goto err_out_iounmap; } q = blk_init_queue(carm_oob_rq_fn, &host->lock); if (!q) { printk(KERN_ERR DRV_NAME "(%s): OOB queue alloc failure ", pci_name(pdev)); rc = -ENOMEM; goto err_out_pci_free; } host->oob_q = q; q->queuedata = host; /* * Figure out which major to use: 160, 161, or dynamic */ if (!test_and_set_bit(0, &carm_major_alloc)) host->major = 160; else if (!test_and_set_bit(1, &carm_major_alloc)) host->major = 161; else host->flags |= FL_DYN_MAJOR; host->id = carm_host_id; sprintf(host->name, DRV_NAME "%d", carm_host_id); rc = register_blkdev(host->major, host->name); if (rc < 0) goto err_out_free_majors; if (host->flags & FL_DYN_MAJOR) host->major = rc; |
1da177e4c Linux-2.6.12-rc2 |
1698 1699 1700 1701 1702 |
rc = carm_init_disks(host); if (rc) goto err_out_blkdev_disks; pci_set_master(pdev); |
69ab3912d [PATCH] irq-flags... |
1703 |
rc = request_irq(pdev->irq, carm_interrupt, IRQF_SHARED, DRV_NAME, host); |
1da177e4c Linux-2.6.12-rc2 |
1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 |
if (rc) { printk(KERN_ERR DRV_NAME "(%s): irq alloc failure ", pci_name(pdev)); goto err_out_blkdev_disks; } rc = carm_init_host(host); if (rc) goto err_out_free_irq; |
906c3b75f [PATCH] mutex sub... |
1714 1715 1716 |
DPRINTK("waiting for probe_comp "); wait_for_completion(&host->probe_comp); |
1da177e4c Linux-2.6.12-rc2 |
1717 |
|
e29419fff [PATCH] 64bit res... |
1718 1719 |
printk(KERN_INFO "%s: pci %s, ports %d, io %llx, irq %u, major %d ", |
1da177e4c Linux-2.6.12-rc2 |
1720 |
host->name, pci_name(pdev), (int) CARM_MAX_PORTS, |
e29419fff [PATCH] 64bit res... |
1721 1722 |
(unsigned long long)pci_resource_start(pdev, 0), pdev->irq, host->major); |
1da177e4c Linux-2.6.12-rc2 |
1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 |
carm_host_id++; pci_set_drvdata(pdev, host); return 0; err_out_free_irq: free_irq(pdev->irq, host); err_out_blkdev_disks: carm_free_disks(host); unregister_blkdev(host->major, host->name); err_out_free_majors: if (host->major == 160) clear_bit(0, &carm_major_alloc); else if (host->major == 161) clear_bit(1, &carm_major_alloc); blk_cleanup_queue(host->oob_q); err_out_pci_free: pci_free_consistent(pdev, CARM_SHM_SIZE, host->shm, host->shm_dma); err_out_iounmap: iounmap(host->mmio); err_out_kfree: kfree(host); err_out_regions: pci_release_regions(pdev); err_out: pci_disable_device(pdev); return rc; } static void carm_remove_one (struct pci_dev *pdev) { struct carm_host *host = pci_get_drvdata(pdev); if (!host) { printk(KERN_ERR PFX "BUG: no host data for PCI(%s) ", pci_name(pdev)); return; } free_irq(pdev->irq, host); carm_free_disks(host); |
1da177e4c Linux-2.6.12-rc2 |
1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 |
unregister_blkdev(host->major, host->name); if (host->major == 160) clear_bit(0, &carm_major_alloc); else if (host->major == 161) clear_bit(1, &carm_major_alloc); blk_cleanup_queue(host->oob_q); pci_free_consistent(pdev, CARM_SHM_SIZE, host->shm, host->shm_dma); iounmap(host->mmio); kfree(host); pci_release_regions(pdev); pci_disable_device(pdev); pci_set_drvdata(pdev, NULL); } static int __init carm_init(void) { |
9bfab8cec [PATCH] drivers/b... |
1781 |
return pci_register_driver(&carm_driver); |
1da177e4c Linux-2.6.12-rc2 |
1782 1783 1784 1785 1786 1787 1788 1789 1790 |
} static void __exit carm_exit(void) { pci_unregister_driver(&carm_driver); } module_init(carm_init); module_exit(carm_exit); |