| 1 | /* |
| 2 | * Implementation of SCSI Processor Target Peripheral driver for CAM. |
| 3 | * |
| 4 | * Copyright (c) 1998 Justin T. Gibbs. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions, and the following disclaimer, |
| 12 | * without modification, immediately at the beginning of the file. |
| 13 | * 2. The name of the author may not be used to endorse or promote products |
| 14 | * derived from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 17 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 19 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR |
| 20 | * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 21 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 22 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 23 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 24 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 25 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 26 | * SUCH DAMAGE. |
| 27 | * |
| 28 | * $FreeBSD: src/sys/cam/scsi/scsi_pt.c,v 1.17 2000/01/17 06:27:37 mjacob Exp $ |
| 29 | * $DragonFly: src/sys/bus/cam/scsi/scsi_pt.c,v 1.5 2003/07/21 07:57:36 dillon Exp $ |
| 30 | */ |
| 31 | |
| 32 | #include <sys/param.h> |
| 33 | #include <sys/queue.h> |
| 34 | #include <sys/systm.h> |
| 35 | #include <sys/kernel.h> |
| 36 | #include <sys/types.h> |
| 37 | #include <sys/buf.h> |
| 38 | #include <sys/devicestat.h> |
| 39 | #include <sys/malloc.h> |
| 40 | #include <sys/conf.h> |
| 41 | #include <sys/ptio.h> |
| 42 | |
| 43 | #include <cam/cam.h> |
| 44 | #include <cam/cam_ccb.h> |
| 45 | #include <cam/cam_extend.h> |
| 46 | #include <cam/cam_periph.h> |
| 47 | #include <cam/cam_xpt_periph.h> |
| 48 | #include <cam/cam_debug.h> |
| 49 | |
| 50 | #include <cam/scsi/scsi_all.h> |
| 51 | #include <cam/scsi/scsi_message.h> |
| 52 | #include <cam/scsi/scsi_pt.h> |
| 53 | |
| 54 | #include "opt_pt.h" |
| 55 | |
| 56 | typedef enum { |
| 57 | PT_STATE_PROBE, |
| 58 | PT_STATE_NORMAL |
| 59 | } pt_state; |
| 60 | |
| 61 | typedef enum { |
| 62 | PT_FLAG_NONE = 0x00, |
| 63 | PT_FLAG_OPEN = 0x01, |
| 64 | PT_FLAG_DEVICE_INVALID = 0x02, |
| 65 | PT_FLAG_RETRY_UA = 0x04 |
| 66 | } pt_flags; |
| 67 | |
| 68 | typedef enum { |
| 69 | PT_CCB_BUFFER_IO = 0x01, |
| 70 | PT_CCB_WAITING = 0x02, |
| 71 | PT_CCB_RETRY_UA = 0x04, |
| 72 | PT_CCB_BUFFER_IO_UA = PT_CCB_BUFFER_IO|PT_CCB_RETRY_UA |
| 73 | } pt_ccb_state; |
| 74 | |
| 75 | /* Offsets into our private area for storing information */ |
| 76 | #define ccb_state ppriv_field0 |
| 77 | #define ccb_bp ppriv_ptr1 |
| 78 | |
| 79 | struct pt_softc { |
| 80 | struct buf_queue_head buf_queue; |
| 81 | struct devstat device_stats; |
| 82 | LIST_HEAD(, ccb_hdr) pending_ccbs; |
| 83 | pt_state state; |
| 84 | pt_flags flags; |
| 85 | union ccb saved_ccb; |
| 86 | int io_timeout; |
| 87 | dev_t dev; |
| 88 | }; |
| 89 | |
| 90 | static d_open_t ptopen; |
| 91 | static d_close_t ptclose; |
| 92 | static d_strategy_t ptstrategy; |
| 93 | static periph_init_t ptinit; |
| 94 | static void ptasync(void *callback_arg, u_int32_t code, |
| 95 | struct cam_path *path, void *arg); |
| 96 | static periph_ctor_t ptctor; |
| 97 | static periph_oninv_t ptoninvalidate; |
| 98 | static periph_dtor_t ptdtor; |
| 99 | static periph_start_t ptstart; |
| 100 | static void ptdone(struct cam_periph *periph, |
| 101 | union ccb *done_ccb); |
| 102 | static d_ioctl_t ptioctl; |
| 103 | static int pterror(union ccb *ccb, u_int32_t cam_flags, |
| 104 | u_int32_t sense_flags); |
| 105 | |
| 106 | void scsi_send_receive(struct ccb_scsiio *csio, u_int32_t retries, |
| 107 | void (*cbfcnp)(struct cam_periph *, union ccb *), |
| 108 | u_int tag_action, int readop, u_int byte2, |
| 109 | u_int32_t xfer_len, u_int8_t *data_ptr, |
| 110 | u_int8_t sense_len, u_int32_t timeout); |
| 111 | |
| 112 | static struct periph_driver ptdriver = |
| 113 | { |
| 114 | ptinit, "pt", |
| 115 | TAILQ_HEAD_INITIALIZER(ptdriver.units), /* generation */ 0 |
| 116 | }; |
| 117 | |
| 118 | DATA_SET(periphdriver_set, ptdriver); |
| 119 | |
| 120 | #define PT_CDEV_MAJOR 61 |
| 121 | |
| 122 | static struct cdevsw pt_cdevsw = { |
| 123 | /* name */ "pt", |
| 124 | /* maj */ PT_CDEV_MAJOR, |
| 125 | /* flags */ 0, |
| 126 | /* port */ NULL, |
| 127 | /* autoq */ 0, |
| 128 | |
| 129 | /* open */ ptopen, |
| 130 | /* close */ ptclose, |
| 131 | /* read */ physread, |
| 132 | /* write */ physwrite, |
| 133 | /* ioctl */ ptioctl, |
| 134 | /* poll */ nopoll, |
| 135 | /* mmap */ nommap, |
| 136 | /* strategy */ ptstrategy, |
| 137 | /* dump */ nodump, |
| 138 | /* psize */ nopsize |
| 139 | }; |
| 140 | |
| 141 | static struct extend_array *ptperiphs; |
| 142 | |
| 143 | #ifndef SCSI_PT_DEFAULT_TIMEOUT |
| 144 | #define SCSI_PT_DEFAULT_TIMEOUT 60 |
| 145 | #endif |
| 146 | |
| 147 | static int |
| 148 | ptopen(dev_t dev, int flags, int fmt, struct thread *td) |
| 149 | { |
| 150 | struct cam_periph *periph; |
| 151 | struct pt_softc *softc; |
| 152 | int unit; |
| 153 | int error; |
| 154 | int s; |
| 155 | |
| 156 | unit = minor(dev); |
| 157 | periph = cam_extend_get(ptperiphs, unit); |
| 158 | if (periph == NULL) |
| 159 | return (ENXIO); |
| 160 | |
| 161 | softc = (struct pt_softc *)periph->softc; |
| 162 | |
| 163 | s = splsoftcam(); |
| 164 | if (softc->flags & PT_FLAG_DEVICE_INVALID) { |
| 165 | splx(s); |
| 166 | return(ENXIO); |
| 167 | } |
| 168 | |
| 169 | CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, |
| 170 | ("ptopen: dev=%s (unit %d)\n", devtoname(dev), unit)); |
| 171 | |
| 172 | if ((error = cam_periph_lock(periph, PCATCH)) != 0) { |
| 173 | splx(s); |
| 174 | return (error); /* error code from tsleep */ |
| 175 | } |
| 176 | |
| 177 | splx(s); |
| 178 | |
| 179 | if ((softc->flags & PT_FLAG_OPEN) == 0) { |
| 180 | if (cam_periph_acquire(periph) != CAM_REQ_CMP) |
| 181 | error = ENXIO; |
| 182 | else |
| 183 | softc->flags |= PT_FLAG_OPEN; |
| 184 | } else |
| 185 | error = EBUSY; |
| 186 | |
| 187 | cam_periph_unlock(periph); |
| 188 | return (error); |
| 189 | } |
| 190 | |
| 191 | static int |
| 192 | ptclose(dev_t dev, int flag, int fmt, struct thread *td) |
| 193 | { |
| 194 | struct cam_periph *periph; |
| 195 | struct pt_softc *softc; |
| 196 | int unit; |
| 197 | int error; |
| 198 | |
| 199 | unit = minor(dev); |
| 200 | periph = cam_extend_get(ptperiphs, unit); |
| 201 | if (periph == NULL) |
| 202 | return (ENXIO); |
| 203 | |
| 204 | softc = (struct pt_softc *)periph->softc; |
| 205 | |
| 206 | if ((error = cam_periph_lock(periph, 0)) != 0) |
| 207 | return (error); /* error code from tsleep */ |
| 208 | |
| 209 | softc->flags &= ~PT_FLAG_OPEN; |
| 210 | cam_periph_unlock(periph); |
| 211 | cam_periph_release(periph); |
| 212 | return (0); |
| 213 | } |
| 214 | |
| 215 | /* |
| 216 | * Actually translate the requested transfer into one the physical driver |
| 217 | * can understand. The transfer is described by a buf and will include |
| 218 | * only one physical transfer. |
| 219 | */ |
| 220 | static void |
| 221 | ptstrategy(struct buf *bp) |
| 222 | { |
| 223 | struct cam_periph *periph; |
| 224 | struct pt_softc *softc; |
| 225 | u_int unit; |
| 226 | int s; |
| 227 | |
| 228 | unit = minor(bp->b_dev); |
| 229 | periph = cam_extend_get(ptperiphs, unit); |
| 230 | if (periph == NULL) { |
| 231 | bp->b_error = ENXIO; |
| 232 | goto bad; |
| 233 | } |
| 234 | softc = (struct pt_softc *)periph->softc; |
| 235 | |
| 236 | /* |
| 237 | * Mask interrupts so that the pack cannot be invalidated until |
| 238 | * after we are in the queue. Otherwise, we might not properly |
| 239 | * clean up one of the buffers. |
| 240 | */ |
| 241 | s = splbio(); |
| 242 | |
| 243 | /* |
| 244 | * If the device has been made invalid, error out |
| 245 | */ |
| 246 | if ((softc->flags & PT_FLAG_DEVICE_INVALID)) { |
| 247 | splx(s); |
| 248 | bp->b_error = ENXIO; |
| 249 | goto bad; |
| 250 | } |
| 251 | |
| 252 | /* |
| 253 | * Place it in the queue of disk activities for this disk |
| 254 | */ |
| 255 | bufq_insert_tail(&softc->buf_queue, bp); |
| 256 | |
| 257 | splx(s); |
| 258 | |
| 259 | /* |
| 260 | * Schedule ourselves for performing the work. |
| 261 | */ |
| 262 | xpt_schedule(periph, /* XXX priority */1); |
| 263 | |
| 264 | return; |
| 265 | bad: |
| 266 | bp->b_flags |= B_ERROR; |
| 267 | |
| 268 | /* |
| 269 | * Correctly set the buf to indicate a completed xfer |
| 270 | */ |
| 271 | bp->b_resid = bp->b_bcount; |
| 272 | biodone(bp); |
| 273 | } |
| 274 | |
| 275 | static void |
| 276 | ptinit(void) |
| 277 | { |
| 278 | cam_status status; |
| 279 | struct cam_path *path; |
| 280 | |
| 281 | /* |
| 282 | * Create our extend array for storing the devices we attach to. |
| 283 | */ |
| 284 | ptperiphs = cam_extend_new(); |
| 285 | if (ptperiphs == NULL) { |
| 286 | printf("pt: Failed to alloc extend array!\n"); |
| 287 | return; |
| 288 | } |
| 289 | |
| 290 | /* |
| 291 | * Install a global async callback. This callback will |
| 292 | * receive async callbacks like "new device found". |
| 293 | */ |
| 294 | status = xpt_create_path(&path, /*periph*/NULL, CAM_XPT_PATH_ID, |
| 295 | CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD); |
| 296 | |
| 297 | if (status == CAM_REQ_CMP) { |
| 298 | struct ccb_setasync csa; |
| 299 | |
| 300 | xpt_setup_ccb(&csa.ccb_h, path, /*priority*/5); |
| 301 | csa.ccb_h.func_code = XPT_SASYNC_CB; |
| 302 | csa.event_enable = AC_FOUND_DEVICE; |
| 303 | csa.callback = ptasync; |
| 304 | csa.callback_arg = NULL; |
| 305 | xpt_action((union ccb *)&csa); |
| 306 | status = csa.ccb_h.status; |
| 307 | xpt_free_path(path); |
| 308 | } |
| 309 | |
| 310 | if (status != CAM_REQ_CMP) { |
| 311 | printf("pt: Failed to attach master async callback " |
| 312 | "due to status 0x%x!\n", status); |
| 313 | } |
| 314 | } |
| 315 | |
| 316 | static cam_status |
| 317 | ptctor(struct cam_periph *periph, void *arg) |
| 318 | { |
| 319 | struct pt_softc *softc; |
| 320 | struct ccb_setasync csa; |
| 321 | struct ccb_getdev *cgd; |
| 322 | |
| 323 | cgd = (struct ccb_getdev *)arg; |
| 324 | if (periph == NULL) { |
| 325 | printf("ptregister: periph was NULL!!\n"); |
| 326 | return(CAM_REQ_CMP_ERR); |
| 327 | } |
| 328 | |
| 329 | if (cgd == NULL) { |
| 330 | printf("ptregister: no getdev CCB, can't register device\n"); |
| 331 | return(CAM_REQ_CMP_ERR); |
| 332 | } |
| 333 | |
| 334 | softc = (struct pt_softc *)malloc(sizeof(*softc),M_DEVBUF,M_NOWAIT); |
| 335 | |
| 336 | if (softc == NULL) { |
| 337 | printf("daregister: Unable to probe new device. " |
| 338 | "Unable to allocate softc\n"); |
| 339 | return(CAM_REQ_CMP_ERR); |
| 340 | } |
| 341 | |
| 342 | bzero(softc, sizeof(*softc)); |
| 343 | LIST_INIT(&softc->pending_ccbs); |
| 344 | softc->state = PT_STATE_NORMAL; |
| 345 | bufq_init(&softc->buf_queue); |
| 346 | |
| 347 | softc->io_timeout = SCSI_PT_DEFAULT_TIMEOUT * 1000; |
| 348 | |
| 349 | periph->softc = softc; |
| 350 | |
| 351 | cam_extend_set(ptperiphs, periph->unit_number, periph); |
| 352 | |
| 353 | devstat_add_entry(&softc->device_stats, "pt", |
| 354 | periph->unit_number, 0, |
| 355 | DEVSTAT_NO_BLOCKSIZE, |
| 356 | SID_TYPE(&cgd->inq_data) | DEVSTAT_TYPE_IF_SCSI, |
| 357 | DEVSTAT_PRIORITY_OTHER); |
| 358 | |
| 359 | softc->dev = make_dev(&pt_cdevsw, periph->unit_number, UID_ROOT, |
| 360 | GID_OPERATOR, 0600, "%s%d", periph->periph_name, |
| 361 | periph->unit_number); |
| 362 | /* |
| 363 | * Add async callbacks for bus reset and |
| 364 | * bus device reset calls. I don't bother |
| 365 | * checking if this fails as, in most cases, |
| 366 | * the system will function just fine without |
| 367 | * them and the only alternative would be to |
| 368 | * not attach the device on failure. |
| 369 | */ |
| 370 | xpt_setup_ccb(&csa.ccb_h, periph->path, /*priority*/5); |
| 371 | csa.ccb_h.func_code = XPT_SASYNC_CB; |
| 372 | csa.event_enable = AC_SENT_BDR | AC_BUS_RESET | AC_LOST_DEVICE; |
| 373 | csa.callback = ptasync; |
| 374 | csa.callback_arg = periph; |
| 375 | xpt_action((union ccb *)&csa); |
| 376 | |
| 377 | /* Tell the user we've attached to the device */ |
| 378 | xpt_announce_periph(periph, NULL); |
| 379 | |
| 380 | return(CAM_REQ_CMP); |
| 381 | } |
| 382 | |
| 383 | static void |
| 384 | ptoninvalidate(struct cam_periph *periph) |
| 385 | { |
| 386 | int s; |
| 387 | struct pt_softc *softc; |
| 388 | struct buf *q_bp; |
| 389 | struct ccb_setasync csa; |
| 390 | |
| 391 | softc = (struct pt_softc *)periph->softc; |
| 392 | |
| 393 | /* |
| 394 | * De-register any async callbacks. |
| 395 | */ |
| 396 | xpt_setup_ccb(&csa.ccb_h, periph->path, |
| 397 | /* priority */ 5); |
| 398 | csa.ccb_h.func_code = XPT_SASYNC_CB; |
| 399 | csa.event_enable = 0; |
| 400 | csa.callback = ptasync; |
| 401 | csa.callback_arg = periph; |
| 402 | xpt_action((union ccb *)&csa); |
| 403 | |
| 404 | softc->flags |= PT_FLAG_DEVICE_INVALID; |
| 405 | |
| 406 | /* |
| 407 | * Although the oninvalidate() routines are always called at |
| 408 | * splsoftcam, we need to be at splbio() here to keep the buffer |
| 409 | * queue from being modified while we traverse it. |
| 410 | */ |
| 411 | s = splbio(); |
| 412 | |
| 413 | /* |
| 414 | * Return all queued I/O with ENXIO. |
| 415 | * XXX Handle any transactions queued to the card |
| 416 | * with XPT_ABORT_CCB. |
| 417 | */ |
| 418 | while ((q_bp = bufq_first(&softc->buf_queue)) != NULL){ |
| 419 | bufq_remove(&softc->buf_queue, q_bp); |
| 420 | q_bp->b_resid = q_bp->b_bcount; |
| 421 | q_bp->b_error = ENXIO; |
| 422 | q_bp->b_flags |= B_ERROR; |
| 423 | biodone(q_bp); |
| 424 | } |
| 425 | |
| 426 | splx(s); |
| 427 | |
| 428 | xpt_print_path(periph->path); |
| 429 | printf("lost device\n"); |
| 430 | } |
| 431 | |
| 432 | static void |
| 433 | ptdtor(struct cam_periph *periph) |
| 434 | { |
| 435 | struct pt_softc *softc; |
| 436 | |
| 437 | softc = (struct pt_softc *)periph->softc; |
| 438 | |
| 439 | devstat_remove_entry(&softc->device_stats); |
| 440 | |
| 441 | destroy_dev(softc->dev); |
| 442 | |
| 443 | cam_extend_release(ptperiphs, periph->unit_number); |
| 444 | xpt_print_path(periph->path); |
| 445 | printf("removing device entry\n"); |
| 446 | free(softc, M_DEVBUF); |
| 447 | } |
| 448 | |
| 449 | static void |
| 450 | ptasync(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg) |
| 451 | { |
| 452 | struct cam_periph *periph; |
| 453 | |
| 454 | periph = (struct cam_periph *)callback_arg; |
| 455 | switch (code) { |
| 456 | case AC_FOUND_DEVICE: |
| 457 | { |
| 458 | struct ccb_getdev *cgd; |
| 459 | cam_status status; |
| 460 | |
| 461 | cgd = (struct ccb_getdev *)arg; |
| 462 | |
| 463 | if (SID_TYPE(&cgd->inq_data) != T_PROCESSOR) |
| 464 | break; |
| 465 | |
| 466 | /* |
| 467 | * Allocate a peripheral instance for |
| 468 | * this device and start the probe |
| 469 | * process. |
| 470 | */ |
| 471 | status = cam_periph_alloc(ptctor, ptoninvalidate, ptdtor, |
| 472 | ptstart, "pt", CAM_PERIPH_BIO, |
| 473 | cgd->ccb_h.path, ptasync, |
| 474 | AC_FOUND_DEVICE, cgd); |
| 475 | |
| 476 | if (status != CAM_REQ_CMP |
| 477 | && status != CAM_REQ_INPROG) |
| 478 | printf("ptasync: Unable to attach to new device " |
| 479 | "due to status 0x%x\n", status); |
| 480 | break; |
| 481 | } |
| 482 | case AC_SENT_BDR: |
| 483 | case AC_BUS_RESET: |
| 484 | { |
| 485 | struct pt_softc *softc; |
| 486 | struct ccb_hdr *ccbh; |
| 487 | int s; |
| 488 | |
| 489 | softc = (struct pt_softc *)periph->softc; |
| 490 | s = splsoftcam(); |
| 491 | /* |
| 492 | * Don't fail on the expected unit attention |
| 493 | * that will occur. |
| 494 | */ |
| 495 | softc->flags |= PT_FLAG_RETRY_UA; |
| 496 | for (ccbh = LIST_FIRST(&softc->pending_ccbs); |
| 497 | ccbh != NULL; ccbh = LIST_NEXT(ccbh, periph_links.le)) |
| 498 | ccbh->ccb_state |= PT_CCB_RETRY_UA; |
| 499 | splx(s); |
| 500 | /* FALLTHROUGH */ |
| 501 | } |
| 502 | default: |
| 503 | cam_periph_async(periph, code, path, arg); |
| 504 | break; |
| 505 | } |
| 506 | } |
| 507 | |
| 508 | static void |
| 509 | ptstart(struct cam_periph *periph, union ccb *start_ccb) |
| 510 | { |
| 511 | struct pt_softc *softc; |
| 512 | struct buf *bp; |
| 513 | int s; |
| 514 | |
| 515 | softc = (struct pt_softc *)periph->softc; |
| 516 | |
| 517 | /* |
| 518 | * See if there is a buf with work for us to do.. |
| 519 | */ |
| 520 | s = splbio(); |
| 521 | bp = bufq_first(&softc->buf_queue); |
| 522 | if (periph->immediate_priority <= periph->pinfo.priority) { |
| 523 | CAM_DEBUG_PRINT(CAM_DEBUG_SUBTRACE, |
| 524 | ("queuing for immediate ccb\n")); |
| 525 | start_ccb->ccb_h.ccb_state = PT_CCB_WAITING; |
| 526 | SLIST_INSERT_HEAD(&periph->ccb_list, &start_ccb->ccb_h, |
| 527 | periph_links.sle); |
| 528 | periph->immediate_priority = CAM_PRIORITY_NONE; |
| 529 | splx(s); |
| 530 | wakeup(&periph->ccb_list); |
| 531 | } else if (bp == NULL) { |
| 532 | splx(s); |
| 533 | xpt_release_ccb(start_ccb); |
| 534 | } else { |
| 535 | int oldspl; |
| 536 | |
| 537 | bufq_remove(&softc->buf_queue, bp); |
| 538 | |
| 539 | devstat_start_transaction(&softc->device_stats); |
| 540 | |
| 541 | scsi_send_receive(&start_ccb->csio, |
| 542 | /*retries*/4, |
| 543 | ptdone, |
| 544 | MSG_SIMPLE_Q_TAG, |
| 545 | bp->b_flags & B_READ, |
| 546 | /*byte2*/0, |
| 547 | bp->b_bcount, |
| 548 | bp->b_data, |
| 549 | /*sense_len*/SSD_FULL_SIZE, |
| 550 | /*timeout*/softc->io_timeout); |
| 551 | |
| 552 | start_ccb->ccb_h.ccb_state = PT_CCB_BUFFER_IO; |
| 553 | |
| 554 | /* |
| 555 | * Block out any asyncronous callbacks |
| 556 | * while we touch the pending ccb list. |
| 557 | */ |
| 558 | oldspl = splcam(); |
| 559 | LIST_INSERT_HEAD(&softc->pending_ccbs, &start_ccb->ccb_h, |
| 560 | periph_links.le); |
| 561 | splx(oldspl); |
| 562 | |
| 563 | start_ccb->ccb_h.ccb_bp = bp; |
| 564 | bp = bufq_first(&softc->buf_queue); |
| 565 | splx(s); |
| 566 | |
| 567 | xpt_action(start_ccb); |
| 568 | |
| 569 | if (bp != NULL) { |
| 570 | /* Have more work to do, so ensure we stay scheduled */ |
| 571 | xpt_schedule(periph, /* XXX priority */1); |
| 572 | } |
| 573 | } |
| 574 | } |
| 575 | |
| 576 | static void |
| 577 | ptdone(struct cam_periph *periph, union ccb *done_ccb) |
| 578 | { |
| 579 | struct pt_softc *softc; |
| 580 | struct ccb_scsiio *csio; |
| 581 | |
| 582 | softc = (struct pt_softc *)periph->softc; |
| 583 | csio = &done_ccb->csio; |
| 584 | switch (csio->ccb_h.ccb_state) { |
| 585 | case PT_CCB_BUFFER_IO: |
| 586 | case PT_CCB_BUFFER_IO_UA: |
| 587 | { |
| 588 | struct buf *bp; |
| 589 | int oldspl; |
| 590 | |
| 591 | bp = (struct buf *)done_ccb->ccb_h.ccb_bp; |
| 592 | if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) { |
| 593 | int error; |
| 594 | int s; |
| 595 | int sf; |
| 596 | |
| 597 | if ((csio->ccb_h.ccb_state & PT_CCB_RETRY_UA) != 0) |
| 598 | sf = SF_RETRY_UA; |
| 599 | else |
| 600 | sf = 0; |
| 601 | |
| 602 | sf |= SF_RETRY_SELTO; |
| 603 | |
| 604 | if ((error = pterror(done_ccb, 0, sf)) == ERESTART) { |
| 605 | /* |
| 606 | * A retry was scheuled, so |
| 607 | * just return. |
| 608 | */ |
| 609 | return; |
| 610 | } |
| 611 | if (error != 0) { |
| 612 | struct buf *q_bp; |
| 613 | |
| 614 | s = splbio(); |
| 615 | |
| 616 | if (error == ENXIO) { |
| 617 | /* |
| 618 | * Catastrophic error. Mark our device |
| 619 | * as invalid. |
| 620 | */ |
| 621 | xpt_print_path(periph->path); |
| 622 | printf("Invalidating device\n"); |
| 623 | softc->flags |= PT_FLAG_DEVICE_INVALID; |
| 624 | } |
| 625 | |
| 626 | /* |
| 627 | * return all queued I/O with EIO, so that |
| 628 | * the client can retry these I/Os in the |
| 629 | * proper order should it attempt to recover. |
| 630 | */ |
| 631 | while ((q_bp = bufq_first(&softc->buf_queue)) |
| 632 | != NULL) { |
| 633 | bufq_remove(&softc->buf_queue, q_bp); |
| 634 | q_bp->b_resid = q_bp->b_bcount; |
| 635 | q_bp->b_error = EIO; |
| 636 | q_bp->b_flags |= B_ERROR; |
| 637 | biodone(q_bp); |
| 638 | } |
| 639 | splx(s); |
| 640 | bp->b_error = error; |
| 641 | bp->b_resid = bp->b_bcount; |
| 642 | bp->b_flags |= B_ERROR; |
| 643 | } else { |
| 644 | bp->b_resid = csio->resid; |
| 645 | bp->b_error = 0; |
| 646 | if (bp->b_resid != 0) { |
| 647 | /* Short transfer ??? */ |
| 648 | bp->b_flags |= B_ERROR; |
| 649 | } |
| 650 | } |
| 651 | if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) |
| 652 | cam_release_devq(done_ccb->ccb_h.path, |
| 653 | /*relsim_flags*/0, |
| 654 | /*reduction*/0, |
| 655 | /*timeout*/0, |
| 656 | /*getcount_only*/0); |
| 657 | } else { |
| 658 | bp->b_resid = csio->resid; |
| 659 | if (bp->b_resid != 0) |
| 660 | bp->b_flags |= B_ERROR; |
| 661 | } |
| 662 | |
| 663 | /* |
| 664 | * Block out any asyncronous callbacks |
| 665 | * while we touch the pending ccb list. |
| 666 | */ |
| 667 | oldspl = splcam(); |
| 668 | LIST_REMOVE(&done_ccb->ccb_h, periph_links.le); |
| 669 | splx(oldspl); |
| 670 | |
| 671 | devstat_end_transaction_buf(&softc->device_stats, bp); |
| 672 | biodone(bp); |
| 673 | break; |
| 674 | } |
| 675 | case PT_CCB_WAITING: |
| 676 | /* Caller will release the CCB */ |
| 677 | wakeup(&done_ccb->ccb_h.cbfcnp); |
| 678 | return; |
| 679 | } |
| 680 | xpt_release_ccb(done_ccb); |
| 681 | } |
| 682 | |
| 683 | static int |
| 684 | pterror(union ccb *ccb, u_int32_t cam_flags, u_int32_t sense_flags) |
| 685 | { |
| 686 | struct pt_softc *softc; |
| 687 | struct cam_periph *periph; |
| 688 | |
| 689 | periph = xpt_path_periph(ccb->ccb_h.path); |
| 690 | softc = (struct pt_softc *)periph->softc; |
| 691 | |
| 692 | return(cam_periph_error(ccb, cam_flags, sense_flags, |
| 693 | &softc->saved_ccb)); |
| 694 | } |
| 695 | |
| 696 | static int |
| 697 | ptioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) |
| 698 | { |
| 699 | struct cam_periph *periph; |
| 700 | struct pt_softc *softc; |
| 701 | int unit; |
| 702 | int error; |
| 703 | |
| 704 | unit = minor(dev); |
| 705 | periph = cam_extend_get(ptperiphs, unit); |
| 706 | |
| 707 | if (periph == NULL) |
| 708 | return(ENXIO); |
| 709 | |
| 710 | softc = (struct pt_softc *)periph->softc; |
| 711 | |
| 712 | if ((error = cam_periph_lock(periph, PCATCH)) != 0) { |
| 713 | return (error); /* error code from tsleep */ |
| 714 | } |
| 715 | |
| 716 | switch(cmd) { |
| 717 | case PTIOCGETTIMEOUT: |
| 718 | if (softc->io_timeout >= 1000) |
| 719 | *(int *)addr = softc->io_timeout / 1000; |
| 720 | else |
| 721 | *(int *)addr = 0; |
| 722 | break; |
| 723 | case PTIOCSETTIMEOUT: |
| 724 | { |
| 725 | int s; |
| 726 | |
| 727 | if (*(int *)addr < 1) { |
| 728 | error = EINVAL; |
| 729 | break; |
| 730 | } |
| 731 | |
| 732 | s = splsoftcam(); |
| 733 | softc->io_timeout = *(int *)addr * 1000; |
| 734 | splx(s); |
| 735 | |
| 736 | break; |
| 737 | } |
| 738 | default: |
| 739 | error = cam_periph_ioctl(periph, cmd, addr, pterror); |
| 740 | break; |
| 741 | } |
| 742 | |
| 743 | cam_periph_unlock(periph); |
| 744 | |
| 745 | return(error); |
| 746 | } |
| 747 | |
| 748 | void |
| 749 | scsi_send_receive(struct ccb_scsiio *csio, u_int32_t retries, |
| 750 | void (*cbfcnp)(struct cam_periph *, union ccb *), |
| 751 | u_int tag_action, int readop, u_int byte2, |
| 752 | u_int32_t xfer_len, u_int8_t *data_ptr, u_int8_t sense_len, |
| 753 | u_int32_t timeout) |
| 754 | { |
| 755 | struct scsi_send_receive *scsi_cmd; |
| 756 | |
| 757 | scsi_cmd = (struct scsi_send_receive *)&csio->cdb_io.cdb_bytes; |
| 758 | scsi_cmd->opcode = readop ? RECEIVE : SEND; |
| 759 | scsi_cmd->byte2 = byte2; |
| 760 | scsi_ulto3b(xfer_len, scsi_cmd->xfer_len); |
| 761 | scsi_cmd->control = 0; |
| 762 | |
| 763 | cam_fill_csio(csio, |
| 764 | retries, |
| 765 | cbfcnp, |
| 766 | /*flags*/readop ? CAM_DIR_IN : CAM_DIR_OUT, |
| 767 | tag_action, |
| 768 | data_ptr, |
| 769 | xfer_len, |
| 770 | sense_len, |
| 771 | sizeof(*scsi_cmd), |
| 772 | timeout); |
| 773 | } |