Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/mfi/mfi_cam.c
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1 /*- 2 * Copyright 2007 Scott Long 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "opt_mfi.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/malloc.h> 36 #include <sys/module.h> 37 #include <sys/selinfo.h> 38 #include <sys/bus.h> 39 #include <sys/conf.h> 40 #include <sys/eventhandler.h> 41 #include <sys/rman.h> 42 #include <sys/bus_dma.h> 43 #include <sys/bio.h> 44 #include <sys/ioccom.h> 45 #include <sys/uio.h> 46 #include <sys/proc.h> 47 #include <sys/signalvar.h> 48 #include <sys/sysctl.h> 49 50 #include <cam/cam.h> 51 #include <cam/cam_ccb.h> 52 #include <cam/cam_debug.h> 53 #include <cam/cam_periph.h> 54 #include <cam/cam_sim.h> 55 #include <cam/cam_xpt_periph.h> 56 #include <cam/cam_xpt_sim.h> 57 #include <cam/scsi/scsi_all.h> 58 #include <cam/scsi/scsi_message.h> 59 60 #include <sys/bus.h> 61 #include <sys/conf.h> 62 #include <machine/md_var.h> 63 #include <machine/bus.h> 64 #include <machine/resource.h> 65 #include <sys/rman.h> 66 67 #include <dev/mfi/mfireg.h> 68 #include <dev/mfi/mfi_ioctl.h> 69 #include <dev/mfi/mfivar.h> 70 71 enum mfip_state { 72 MFIP_STATE_NONE, 73 MFIP_STATE_DETACH, 74 MFIP_STATE_RESCAN 75 }; 76 77 struct mfip_softc { 78 device_t dev; 79 struct mfi_softc *mfi_sc; 80 struct cam_devq *devq; 81 struct cam_sim *sim; 82 struct cam_path *path; 83 enum mfip_state state; 84 }; 85 86 static int mfip_probe(device_t); 87 static int mfip_attach(device_t); 88 static int mfip_detach(device_t); 89 static void mfip_cam_action(struct cam_sim *, union ccb *); 90 static void mfip_cam_poll(struct cam_sim *); 91 static void mfip_cam_rescan(struct mfi_softc *, uint32_t tid); 92 static struct mfi_command * mfip_start(void *); 93 static void mfip_done(struct mfi_command *cm); 94 95 static int mfi_allow_disks = 0; 96 TUNABLE_INT("hw.mfi.allow_cam_disk_passthrough", &mfi_allow_disks); 97 SYSCTL_INT(_hw_mfi, OID_AUTO, allow_cam_disk_passthrough, CTLFLAG_RD, 98 &mfi_allow_disks, 0, "event message locale"); 99 100 static devclass_t mfip_devclass; 101 static device_method_t mfip_methods[] = { 102 DEVMETHOD(device_probe, mfip_probe), 103 DEVMETHOD(device_attach, mfip_attach), 104 DEVMETHOD(device_detach, mfip_detach), 105 {0, 0} 106 }; 107 static driver_t mfip_driver = { 108 "mfip", 109 mfip_methods, 110 sizeof(struct mfip_softc) 111 }; 112 DRIVER_MODULE(mfip, mfi, mfip_driver, mfip_devclass, 0, 0); 113 MODULE_DEPEND(mfip, cam, 1, 1, 1); 114 MODULE_DEPEND(mfip, mfi, 1, 1, 1); 115 116 #define ccb_mfip_ptr sim_priv.entries[0].ptr 117 118 static int 119 mfip_probe(device_t dev) 120 { 121 122 device_set_desc(dev, "SCSI Passthrough Bus"); 123 return (0); 124 } 125 126 static int 127 mfip_attach(device_t dev) 128 { 129 struct mfip_softc *sc; 130 struct mfi_softc *mfisc; 131 132 sc = device_get_softc(dev); 133 if (sc == NULL) 134 return (EINVAL); 135 136 mfisc = device_get_softc(device_get_parent(dev)); 137 sc->dev = dev; 138 sc->state = MFIP_STATE_NONE; 139 sc->mfi_sc = mfisc; 140 mfisc->mfi_cam_start = mfip_start; 141 142 if ((sc->devq = cam_simq_alloc(MFI_SCSI_MAX_CMDS)) == NULL) 143 return (ENOMEM); 144 145 sc->sim = cam_sim_alloc(mfip_cam_action, mfip_cam_poll, "mfi", sc, 146 device_get_unit(dev), &mfisc->mfi_io_lock, 1, 147 MFI_SCSI_MAX_CMDS, sc->devq); 148 if (sc->sim == NULL) { 149 cam_simq_free(sc->devq); 150 sc->devq = NULL; 151 device_printf(dev, "CAM SIM attach failed\n"); 152 return (EINVAL); 153 } 154 155 mfisc->mfi_cam_rescan_cb = mfip_cam_rescan; 156 157 mtx_lock(&mfisc->mfi_io_lock); 158 if (xpt_bus_register(sc->sim, dev, 0) != 0) { 159 device_printf(dev, "XPT bus registration failed\n"); 160 cam_sim_free(sc->sim, FALSE); 161 sc->sim = NULL; 162 cam_simq_free(sc->devq); 163 sc->devq = NULL; 164 mtx_unlock(&mfisc->mfi_io_lock); 165 return (EINVAL); 166 } 167 mtx_unlock(&mfisc->mfi_io_lock); 168 169 return (0); 170 } 171 172 static int 173 mfip_detach(device_t dev) 174 { 175 struct mfip_softc *sc; 176 177 sc = device_get_softc(dev); 178 if (sc == NULL) 179 return (EINVAL); 180 181 mtx_lock(&sc->mfi_sc->mfi_io_lock); 182 if (sc->state == MFIP_STATE_RESCAN) { 183 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 184 return (EBUSY); 185 } 186 sc->state = MFIP_STATE_DETACH; 187 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 188 189 sc->mfi_sc->mfi_cam_rescan_cb = NULL; 190 191 if (sc->sim != NULL) { 192 mtx_lock(&sc->mfi_sc->mfi_io_lock); 193 xpt_bus_deregister(cam_sim_path(sc->sim)); 194 cam_sim_free(sc->sim, FALSE); 195 sc->sim = NULL; 196 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 197 } 198 199 if (sc->devq != NULL) { 200 cam_simq_free(sc->devq); 201 sc->devq = NULL; 202 } 203 204 return (0); 205 } 206 207 static void 208 mfip_cam_action(struct cam_sim *sim, union ccb *ccb) 209 { 210 struct mfip_softc *sc = cam_sim_softc(sim); 211 struct mfi_softc *mfisc = sc->mfi_sc; 212 213 mtx_assert(&mfisc->mfi_io_lock, MA_OWNED); 214 215 switch (ccb->ccb_h.func_code) { 216 case XPT_PATH_INQ: 217 { 218 struct ccb_pathinq *cpi = &ccb->cpi; 219 220 cpi->version_num = 1; 221 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16; 222 cpi->target_sprt = 0; 223 cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN; 224 cpi->hba_eng_cnt = 0; 225 cpi->max_target = MFI_SCSI_MAX_TARGETS; 226 cpi->max_lun = MFI_SCSI_MAX_LUNS; 227 cpi->initiator_id = MFI_SCSI_INITIATOR_ID; 228 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 229 strncpy(cpi->hba_vid, "LSI", HBA_IDLEN); 230 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); 231 cpi->unit_number = cam_sim_unit(sim); 232 cpi->bus_id = cam_sim_bus(sim); 233 cpi->base_transfer_speed = 150000; 234 cpi->transport = XPORT_SAS; 235 cpi->transport_version = 0; 236 cpi->protocol = PROTO_SCSI; 237 cpi->protocol_version = SCSI_REV_2; 238 cpi->ccb_h.status = CAM_REQ_CMP; 239 break; 240 } 241 case XPT_RESET_BUS: 242 ccb->ccb_h.status = CAM_REQ_CMP; 243 break; 244 case XPT_RESET_DEV: 245 ccb->ccb_h.status = CAM_REQ_CMP; 246 break; 247 case XPT_GET_TRAN_SETTINGS: 248 { 249 struct ccb_trans_settings_sas *sas = 250 &ccb->cts.xport_specific.sas; 251 252 ccb->cts.protocol = PROTO_SCSI; 253 ccb->cts.protocol_version = SCSI_REV_2; 254 ccb->cts.transport = XPORT_SAS; 255 ccb->cts.transport_version = 0; 256 257 sas->valid &= ~CTS_SAS_VALID_SPEED; 258 sas->bitrate = 150000; 259 260 ccb->ccb_h.status = CAM_REQ_CMP; 261 break; 262 } 263 case XPT_SET_TRAN_SETTINGS: 264 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 265 break; 266 case XPT_SCSI_IO: 267 { 268 struct ccb_hdr *ccbh = &ccb->ccb_h; 269 struct ccb_scsiio *csio = &ccb->csio; 270 271 ccbh->status = CAM_REQ_INPROG; 272 if (csio->cdb_len > MFI_SCSI_MAX_CDB_LEN) { 273 ccbh->status = CAM_REQ_INVALID; 274 break; 275 } 276 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) { 277 if (ccbh->flags & CAM_DATA_PHYS) { 278 ccbh->status = CAM_REQ_INVALID; 279 break; 280 } 281 if (ccbh->flags & CAM_SCATTER_VALID) { 282 ccbh->status = CAM_REQ_INVALID; 283 break; 284 } 285 } 286 287 ccbh->ccb_mfip_ptr = sc; 288 TAILQ_INSERT_TAIL(&mfisc->mfi_cam_ccbq, ccbh, sim_links.tqe); 289 mfi_startio(mfisc); 290 return; 291 } 292 default: 293 ccb->ccb_h.status = CAM_REQ_INVALID; 294 break; 295 } 296 297 xpt_done(ccb); 298 return; 299 } 300 301 static void 302 mfip_cam_rescan(struct mfi_softc *sc, uint32_t tid) 303 { 304 union ccb *ccb; 305 struct mfip_softc *camsc; 306 struct cam_sim *sim; 307 device_t mfip_dev; 308 309 mtx_lock(&Giant); 310 mfip_dev = device_find_child(sc->mfi_dev, "mfip", -1); 311 mtx_unlock(&Giant); 312 if (mfip_dev == NULL) { 313 device_printf(sc->mfi_dev, "Couldn't find mfip child device!\n"); 314 return; 315 } 316 317 mtx_lock(&sc->mfi_io_lock); 318 camsc = device_get_softc(mfip_dev); 319 if (camsc->state == MFIP_STATE_DETACH) { 320 mtx_unlock(&sc->mfi_io_lock); 321 return; 322 } 323 camsc->state = MFIP_STATE_RESCAN; 324 325 ccb = xpt_alloc_ccb_nowait(); 326 if (ccb == NULL) { 327 mtx_unlock(&sc->mfi_io_lock); 328 device_printf(sc->mfi_dev, 329 "Cannot allocate ccb for bus rescan.\n"); 330 return; 331 } 332 333 sim = camsc->sim; 334 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, cam_sim_path(sim), 335 tid, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 336 xpt_free_ccb(ccb); 337 mtx_unlock(&sc->mfi_io_lock); 338 device_printf(sc->mfi_dev, 339 "Cannot create path for bus rescan.\n"); 340 return; 341 } 342 xpt_rescan(ccb); 343 344 camsc->state = MFIP_STATE_NONE; 345 mtx_unlock(&sc->mfi_io_lock); 346 } 347 348 static struct mfi_command * 349 mfip_start(void *data) 350 { 351 union ccb *ccb = data; 352 struct ccb_hdr *ccbh = &ccb->ccb_h; 353 struct ccb_scsiio *csio = &ccb->csio; 354 struct mfip_softc *sc; 355 struct mfi_pass_frame *pt; 356 struct mfi_command *cm; 357 uint32_t context = 0; 358 359 sc = ccbh->ccb_mfip_ptr; 360 361 if ((cm = mfi_dequeue_free(sc->mfi_sc)) == NULL) 362 return (NULL); 363 364 /* Zero out the MFI frame */ 365 context = cm->cm_frame->header.context; 366 bzero(cm->cm_frame, sizeof(union mfi_frame)); 367 cm->cm_frame->header.context = context; 368 369 pt = &cm->cm_frame->pass; 370 pt->header.cmd = MFI_CMD_PD_SCSI_IO; 371 pt->header.cmd_status = 0; 372 pt->header.scsi_status = 0; 373 pt->header.target_id = ccbh->target_id; 374 pt->header.lun_id = ccbh->target_lun; 375 pt->header.flags = 0; 376 pt->header.timeout = 0; 377 pt->header.data_len = csio->dxfer_len; 378 pt->header.sense_len = MFI_SENSE_LEN; 379 pt->header.cdb_len = csio->cdb_len; 380 pt->sense_addr_lo = (uint32_t)cm->cm_sense_busaddr; 381 pt->sense_addr_hi = (uint32_t)((uint64_t)cm->cm_sense_busaddr >> 32); 382 if (ccbh->flags & CAM_CDB_POINTER) 383 bcopy(csio->cdb_io.cdb_ptr, &pt->cdb[0], csio->cdb_len); 384 else 385 bcopy(csio->cdb_io.cdb_bytes, &pt->cdb[0], csio->cdb_len); 386 cm->cm_complete = mfip_done; 387 cm->cm_private = ccb; 388 cm->cm_sg = &pt->sgl; 389 cm->cm_total_frame_size = MFI_PASS_FRAME_SIZE; 390 cm->cm_data = csio->data_ptr; 391 cm->cm_len = csio->dxfer_len; 392 switch (ccbh->flags & CAM_DIR_MASK) { 393 case CAM_DIR_IN: 394 cm->cm_flags = MFI_CMD_DATAIN; 395 break; 396 case CAM_DIR_OUT: 397 cm->cm_flags = MFI_CMD_DATAOUT; 398 break; 399 case CAM_DIR_NONE: 400 default: 401 cm->cm_data = NULL; 402 cm->cm_len = 0; 403 cm->cm_flags = 0; 404 break; 405 } 406 407 TAILQ_REMOVE(&sc->mfi_sc->mfi_cam_ccbq, ccbh, sim_links.tqe); 408 return (cm); 409 } 410 411 static void 412 mfip_done(struct mfi_command *cm) 413 { 414 union ccb *ccb = cm->cm_private; 415 struct ccb_hdr *ccbh = &ccb->ccb_h; 416 struct ccb_scsiio *csio = &ccb->csio; 417 struct mfip_softc *sc; 418 struct mfi_pass_frame *pt; 419 420 sc = ccbh->ccb_mfip_ptr; 421 pt = &cm->cm_frame->pass; 422 423 switch (pt->header.cmd_status) { 424 case MFI_STAT_OK: 425 { 426 uint8_t command, device; 427 428 ccbh->status = CAM_REQ_CMP; 429 csio->scsi_status = pt->header.scsi_status; 430 if (ccbh->flags & CAM_CDB_POINTER) 431 command = csio->cdb_io.cdb_ptr[0]; 432 else 433 command = csio->cdb_io.cdb_bytes[0]; 434 if (command == INQUIRY) { 435 device = csio->data_ptr[0] & 0x1f; 436 if ((!mfi_allow_disks && device == T_DIRECT) || 437 (device == T_PROCESSOR)) 438 csio->data_ptr[0] = 439 (csio->data_ptr[0] & 0xe0) | T_NODEVICE; 440 } 441 break; 442 } 443 case MFI_STAT_SCSI_DONE_WITH_ERROR: 444 { 445 int sense_len; 446 447 ccbh->status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID; 448 csio->scsi_status = pt->header.scsi_status; 449 if (pt->header.sense_len < csio->sense_len) 450 csio->sense_resid = csio->sense_len - 451 pt->header.sense_len; 452 else 453 csio->sense_resid = 0; 454 sense_len = min(pt->header.sense_len, 455 sizeof(struct scsi_sense_data)); 456 bzero(&csio->sense_data, sizeof(struct scsi_sense_data)); 457 bcopy(&cm->cm_sense->data[0], &csio->sense_data, sense_len); 458 break; 459 } 460 case MFI_STAT_DEVICE_NOT_FOUND: 461 ccbh->status = CAM_SEL_TIMEOUT; 462 break; 463 case MFI_STAT_SCSI_IO_FAILED: 464 ccbh->status = CAM_REQ_CMP_ERR; 465 csio->scsi_status = pt->header.scsi_status; 466 break; 467 default: 468 ccbh->status = CAM_REQ_CMP_ERR; 469 csio->scsi_status = pt->header.scsi_status; 470 break; 471 } 472 473 mfi_release_command(cm); 474 xpt_done(ccb); 475 } 476 477 static void 478 mfip_cam_poll(struct cam_sim *sim) 479 { 480 struct mfip_softc *sc = cam_sim_softc(sim); 481 struct mfi_softc *mfisc = sc->mfi_sc; 482 483 mfisc->mfi_intr_ptr(mfisc); 484 } 485
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