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: releng/9.2/sys/dev/mfi/mfi_cam.c 253037 2013-07-08 15:54:38Z mav $"); 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 <machine/md_var.h> 61 #include <machine/bus.h> 62 #include <machine/resource.h> 63 64 #include <dev/mfi/mfireg.h> 65 #include <dev/mfi/mfi_ioctl.h> 66 #include <dev/mfi/mfivar.h> 67 68 enum mfip_state { 69 MFIP_STATE_NONE, 70 MFIP_STATE_DETACH, 71 MFIP_STATE_RESCAN 72 }; 73 74 struct mfip_softc { 75 device_t dev; 76 struct mfi_softc *mfi_sc; 77 struct cam_devq *devq; 78 struct cam_sim *sim; 79 struct cam_path *path; 80 enum mfip_state state; 81 }; 82 83 static int mfip_probe(device_t); 84 static int mfip_attach(device_t); 85 static int mfip_detach(device_t); 86 static void mfip_cam_action(struct cam_sim *, union ccb *); 87 static void mfip_cam_poll(struct cam_sim *); 88 static void mfip_cam_rescan(struct mfi_softc *, uint32_t tid); 89 static struct mfi_command * mfip_start(void *); 90 static void mfip_done(struct mfi_command *cm); 91 92 static int mfi_allow_disks = 0; 93 TUNABLE_INT("hw.mfi.allow_cam_disk_passthrough", &mfi_allow_disks); 94 SYSCTL_INT(_hw_mfi, OID_AUTO, allow_cam_disk_passthrough, CTLFLAG_RD, 95 &mfi_allow_disks, 0, "event message locale"); 96 97 static devclass_t mfip_devclass; 98 static device_method_t mfip_methods[] = { 99 DEVMETHOD(device_probe, mfip_probe), 100 DEVMETHOD(device_attach, mfip_attach), 101 DEVMETHOD(device_detach, mfip_detach), 102 {0, 0} 103 }; 104 static driver_t mfip_driver = { 105 "mfip", 106 mfip_methods, 107 sizeof(struct mfip_softc) 108 }; 109 DRIVER_MODULE(mfip, mfi, mfip_driver, mfip_devclass, 0, 0); 110 MODULE_DEPEND(mfip, cam, 1, 1, 1); 111 MODULE_DEPEND(mfip, mfi, 1, 1, 1); 112 113 #define ccb_mfip_ptr sim_priv.entries[0].ptr 114 115 static int 116 mfip_probe(device_t dev) 117 { 118 119 device_set_desc(dev, "SCSI Passthrough Bus"); 120 return (0); 121 } 122 123 static int 124 mfip_attach(device_t dev) 125 { 126 struct mfip_softc *sc; 127 struct mfi_softc *mfisc; 128 129 sc = device_get_softc(dev); 130 if (sc == NULL) 131 return (EINVAL); 132 133 mfisc = device_get_softc(device_get_parent(dev)); 134 sc->dev = dev; 135 sc->state = MFIP_STATE_NONE; 136 sc->mfi_sc = mfisc; 137 mfisc->mfi_cam_start = mfip_start; 138 139 if ((sc->devq = cam_simq_alloc(MFI_SCSI_MAX_CMDS)) == NULL) 140 return (ENOMEM); 141 142 sc->sim = cam_sim_alloc(mfip_cam_action, mfip_cam_poll, "mfi", sc, 143 device_get_unit(dev), &mfisc->mfi_io_lock, 1, 144 MFI_SCSI_MAX_CMDS, sc->devq); 145 if (sc->sim == NULL) { 146 cam_simq_free(sc->devq); 147 sc->devq = NULL; 148 device_printf(dev, "CAM SIM attach failed\n"); 149 return (EINVAL); 150 } 151 152 mfisc->mfi_cam_rescan_cb = mfip_cam_rescan; 153 154 mtx_lock(&mfisc->mfi_io_lock); 155 if (xpt_bus_register(sc->sim, dev, 0) != 0) { 156 device_printf(dev, "XPT bus registration failed\n"); 157 cam_sim_free(sc->sim, FALSE); 158 sc->sim = NULL; 159 cam_simq_free(sc->devq); 160 sc->devq = NULL; 161 mtx_unlock(&mfisc->mfi_io_lock); 162 return (EINVAL); 163 } 164 mtx_unlock(&mfisc->mfi_io_lock); 165 166 return (0); 167 } 168 169 static int 170 mfip_detach(device_t dev) 171 { 172 struct mfip_softc *sc; 173 174 sc = device_get_softc(dev); 175 if (sc == NULL) 176 return (EINVAL); 177 178 mtx_lock(&sc->mfi_sc->mfi_io_lock); 179 if (sc->state == MFIP_STATE_RESCAN) { 180 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 181 return (EBUSY); 182 } 183 sc->state = MFIP_STATE_DETACH; 184 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 185 186 sc->mfi_sc->mfi_cam_rescan_cb = NULL; 187 188 if (sc->sim != NULL) { 189 mtx_lock(&sc->mfi_sc->mfi_io_lock); 190 xpt_bus_deregister(cam_sim_path(sc->sim)); 191 cam_sim_free(sc->sim, FALSE); 192 sc->sim = NULL; 193 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 194 } 195 196 if (sc->devq != NULL) { 197 cam_simq_free(sc->devq); 198 sc->devq = NULL; 199 } 200 201 return (0); 202 } 203 204 static void 205 mfip_cam_action(struct cam_sim *sim, union ccb *ccb) 206 { 207 struct mfip_softc *sc = cam_sim_softc(sim); 208 struct mfi_softc *mfisc = sc->mfi_sc; 209 210 mtx_assert(&mfisc->mfi_io_lock, MA_OWNED); 211 212 switch (ccb->ccb_h.func_code) { 213 case XPT_PATH_INQ: 214 { 215 struct ccb_pathinq *cpi = &ccb->cpi; 216 217 cpi->version_num = 1; 218 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16; 219 cpi->target_sprt = 0; 220 cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN; 221 cpi->hba_eng_cnt = 0; 222 cpi->max_target = MFI_SCSI_MAX_TARGETS; 223 cpi->max_lun = MFI_SCSI_MAX_LUNS; 224 cpi->initiator_id = MFI_SCSI_INITIATOR_ID; 225 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 226 strncpy(cpi->hba_vid, "LSI", HBA_IDLEN); 227 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); 228 cpi->unit_number = cam_sim_unit(sim); 229 cpi->bus_id = cam_sim_bus(sim); 230 cpi->base_transfer_speed = 150000; 231 cpi->transport = XPORT_SAS; 232 cpi->transport_version = 0; 233 cpi->protocol = PROTO_SCSI; 234 cpi->protocol_version = SCSI_REV_2; 235 cpi->ccb_h.status = CAM_REQ_CMP; 236 break; 237 } 238 case XPT_RESET_BUS: 239 ccb->ccb_h.status = CAM_REQ_CMP; 240 break; 241 case XPT_RESET_DEV: 242 ccb->ccb_h.status = CAM_REQ_CMP; 243 break; 244 case XPT_GET_TRAN_SETTINGS: 245 { 246 struct ccb_trans_settings_sas *sas = 247 &ccb->cts.xport_specific.sas; 248 249 ccb->cts.protocol = PROTO_SCSI; 250 ccb->cts.protocol_version = SCSI_REV_2; 251 ccb->cts.transport = XPORT_SAS; 252 ccb->cts.transport_version = 0; 253 254 sas->valid &= ~CTS_SAS_VALID_SPEED; 255 sas->bitrate = 150000; 256 257 ccb->ccb_h.status = CAM_REQ_CMP; 258 break; 259 } 260 case XPT_SET_TRAN_SETTINGS: 261 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 262 break; 263 case XPT_SCSI_IO: 264 { 265 struct ccb_hdr *ccbh = &ccb->ccb_h; 266 struct ccb_scsiio *csio = &ccb->csio; 267 268 ccbh->status = CAM_REQ_INPROG; 269 if (csio->cdb_len > MFI_SCSI_MAX_CDB_LEN) { 270 ccbh->status = CAM_REQ_INVALID; 271 break; 272 } 273 ccbh->ccb_mfip_ptr = sc; 274 TAILQ_INSERT_TAIL(&mfisc->mfi_cam_ccbq, ccbh, sim_links.tqe); 275 mfi_startio(mfisc); 276 return; 277 } 278 default: 279 ccb->ccb_h.status = CAM_REQ_INVALID; 280 break; 281 } 282 283 xpt_done(ccb); 284 return; 285 } 286 287 static void 288 mfip_cam_rescan(struct mfi_softc *sc, uint32_t tid) 289 { 290 union ccb *ccb; 291 struct mfip_softc *camsc; 292 struct cam_sim *sim; 293 device_t mfip_dev; 294 295 mtx_lock(&Giant); 296 mfip_dev = device_find_child(sc->mfi_dev, "mfip", -1); 297 mtx_unlock(&Giant); 298 if (mfip_dev == NULL) { 299 device_printf(sc->mfi_dev, "Couldn't find mfip child device!\n"); 300 return; 301 } 302 303 mtx_lock(&sc->mfi_io_lock); 304 camsc = device_get_softc(mfip_dev); 305 if (camsc->state == MFIP_STATE_DETACH) { 306 mtx_unlock(&sc->mfi_io_lock); 307 return; 308 } 309 camsc->state = MFIP_STATE_RESCAN; 310 mtx_unlock(&sc->mfi_io_lock); 311 312 ccb = xpt_alloc_ccb_nowait(); 313 if (ccb == NULL) { 314 device_printf(sc->mfi_dev, 315 "Cannot allocate ccb for bus rescan.\n"); 316 return; 317 } 318 319 sim = camsc->sim; 320 mtx_lock(&sc->mfi_io_lock); 321 if (xpt_create_path(&ccb->ccb_h.path, NULL, cam_sim_path(sim), 322 tid, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 323 xpt_free_ccb(ccb); 324 mtx_unlock(&sc->mfi_io_lock); 325 device_printf(sc->mfi_dev, 326 "Cannot create path for bus rescan.\n"); 327 return; 328 } 329 mtx_unlock(&sc->mfi_io_lock); 330 331 xpt_rescan(ccb); 332 333 mtx_lock(&sc->mfi_io_lock); 334 camsc->state = MFIP_STATE_NONE; 335 mtx_unlock(&sc->mfi_io_lock); 336 } 337 338 static struct mfi_command * 339 mfip_start(void *data) 340 { 341 union ccb *ccb = data; 342 struct ccb_hdr *ccbh = &ccb->ccb_h; 343 struct ccb_scsiio *csio = &ccb->csio; 344 struct mfip_softc *sc; 345 struct mfi_pass_frame *pt; 346 struct mfi_command *cm; 347 uint32_t context = 0; 348 349 sc = ccbh->ccb_mfip_ptr; 350 351 if ((cm = mfi_dequeue_free(sc->mfi_sc)) == NULL) 352 return (NULL); 353 354 /* Zero out the MFI frame */ 355 context = cm->cm_frame->header.context; 356 bzero(cm->cm_frame, sizeof(union mfi_frame)); 357 cm->cm_frame->header.context = context; 358 359 pt = &cm->cm_frame->pass; 360 pt->header.cmd = MFI_CMD_PD_SCSI_IO; 361 pt->header.cmd_status = 0; 362 pt->header.scsi_status = 0; 363 pt->header.target_id = ccbh->target_id; 364 pt->header.lun_id = ccbh->target_lun; 365 pt->header.flags = 0; 366 pt->header.timeout = 0; 367 pt->header.data_len = csio->dxfer_len; 368 pt->header.sense_len = MFI_SENSE_LEN; 369 pt->header.cdb_len = csio->cdb_len; 370 pt->sense_addr_lo = (uint32_t)cm->cm_sense_busaddr; 371 pt->sense_addr_hi = (uint32_t)((uint64_t)cm->cm_sense_busaddr >> 32); 372 if (ccbh->flags & CAM_CDB_POINTER) 373 bcopy(csio->cdb_io.cdb_ptr, &pt->cdb[0], csio->cdb_len); 374 else 375 bcopy(csio->cdb_io.cdb_bytes, &pt->cdb[0], csio->cdb_len); 376 cm->cm_complete = mfip_done; 377 cm->cm_private = ccb; 378 cm->cm_sg = &pt->sgl; 379 cm->cm_total_frame_size = MFI_PASS_FRAME_SIZE; 380 cm->cm_data = ccb; 381 cm->cm_len = csio->dxfer_len; 382 switch (ccbh->flags & CAM_DIR_MASK) { 383 case CAM_DIR_IN: 384 cm->cm_flags = MFI_CMD_DATAIN | MFI_CMD_CCB; 385 break; 386 case CAM_DIR_OUT: 387 cm->cm_flags = MFI_CMD_DATAOUT | MFI_CMD_CCB; 388 break; 389 case CAM_DIR_NONE: 390 default: 391 cm->cm_data = NULL; 392 cm->cm_len = 0; 393 cm->cm_flags = 0; 394 break; 395 } 396 397 TAILQ_REMOVE(&sc->mfi_sc->mfi_cam_ccbq, ccbh, sim_links.tqe); 398 return (cm); 399 } 400 401 static void 402 mfip_done(struct mfi_command *cm) 403 { 404 union ccb *ccb = cm->cm_private; 405 struct ccb_hdr *ccbh = &ccb->ccb_h; 406 struct ccb_scsiio *csio = &ccb->csio; 407 struct mfip_softc *sc; 408 struct mfi_pass_frame *pt; 409 410 sc = ccbh->ccb_mfip_ptr; 411 pt = &cm->cm_frame->pass; 412 413 switch (pt->header.cmd_status) { 414 case MFI_STAT_OK: 415 { 416 uint8_t command, device; 417 418 ccbh->status = CAM_REQ_CMP; 419 csio->scsi_status = pt->header.scsi_status; 420 if (ccbh->flags & CAM_CDB_POINTER) 421 command = csio->cdb_io.cdb_ptr[0]; 422 else 423 command = csio->cdb_io.cdb_bytes[0]; 424 if (command == INQUIRY) { 425 device = csio->data_ptr[0] & 0x1f; 426 if ((!mfi_allow_disks && device == T_DIRECT) || 427 (device == T_PROCESSOR)) 428 csio->data_ptr[0] = 429 (csio->data_ptr[0] & 0xe0) | T_NODEVICE; 430 } 431 break; 432 } 433 case MFI_STAT_SCSI_DONE_WITH_ERROR: 434 { 435 int sense_len; 436 437 ccbh->status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID; 438 csio->scsi_status = pt->header.scsi_status; 439 if (pt->header.sense_len < csio->sense_len) 440 csio->sense_resid = csio->sense_len - 441 pt->header.sense_len; 442 else 443 csio->sense_resid = 0; 444 sense_len = min(pt->header.sense_len, 445 sizeof(struct scsi_sense_data)); 446 bzero(&csio->sense_data, sizeof(struct scsi_sense_data)); 447 bcopy(&cm->cm_sense->data[0], &csio->sense_data, sense_len); 448 break; 449 } 450 case MFI_STAT_DEVICE_NOT_FOUND: 451 ccbh->status = CAM_SEL_TIMEOUT; 452 break; 453 case MFI_STAT_SCSI_IO_FAILED: 454 ccbh->status = CAM_REQ_CMP_ERR; 455 csio->scsi_status = pt->header.scsi_status; 456 break; 457 default: 458 ccbh->status = CAM_REQ_CMP_ERR; 459 csio->scsi_status = pt->header.scsi_status; 460 break; 461 } 462 463 mfi_release_command(cm); 464 xpt_done(ccb); 465 } 466 467 static void 468 mfip_cam_poll(struct cam_sim *sim) 469 { 470 struct mfip_softc *sc = cam_sim_softc(sim); 471 struct mfi_softc *mfisc = sc->mfi_sc; 472 473 mfisc->mfi_intr_ptr(mfisc); 474 } 475
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