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/10.0/sys/dev/mfi/mfi_cam.c 254742 2013-08-23 22:55:52Z markj $"); 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), 102 103 DEVMETHOD_END 104 }; 105 static driver_t mfip_driver = { 106 "mfip", 107 mfip_methods, 108 sizeof(struct mfip_softc) 109 }; 110 DRIVER_MODULE(mfip, mfi, mfip_driver, mfip_devclass, 0, 0); 111 MODULE_DEPEND(mfip, cam, 1, 1, 1); 112 MODULE_DEPEND(mfip, mfi, 1, 1, 1); 113 114 #define ccb_mfip_ptr sim_priv.entries[0].ptr 115 116 static int 117 mfip_probe(device_t dev) 118 { 119 120 device_set_desc(dev, "SCSI Passthrough Bus"); 121 return (0); 122 } 123 124 static int 125 mfip_attach(device_t dev) 126 { 127 struct mfip_softc *sc; 128 struct mfi_softc *mfisc; 129 130 sc = device_get_softc(dev); 131 if (sc == NULL) 132 return (EINVAL); 133 134 mfisc = device_get_softc(device_get_parent(dev)); 135 sc->dev = dev; 136 sc->state = MFIP_STATE_NONE; 137 sc->mfi_sc = mfisc; 138 mfisc->mfi_cam_start = mfip_start; 139 140 if ((sc->devq = cam_simq_alloc(MFI_SCSI_MAX_CMDS)) == NULL) 141 return (ENOMEM); 142 143 sc->sim = cam_sim_alloc(mfip_cam_action, mfip_cam_poll, "mfi", sc, 144 device_get_unit(dev), &mfisc->mfi_io_lock, 1, 145 MFI_SCSI_MAX_CMDS, sc->devq); 146 if (sc->sim == NULL) { 147 cam_simq_free(sc->devq); 148 sc->devq = NULL; 149 device_printf(dev, "CAM SIM attach failed\n"); 150 return (EINVAL); 151 } 152 153 mfisc->mfi_cam_rescan_cb = mfip_cam_rescan; 154 155 mtx_lock(&mfisc->mfi_io_lock); 156 if (xpt_bus_register(sc->sim, dev, 0) != 0) { 157 device_printf(dev, "XPT bus registration failed\n"); 158 cam_sim_free(sc->sim, FALSE); 159 sc->sim = NULL; 160 cam_simq_free(sc->devq); 161 sc->devq = NULL; 162 mtx_unlock(&mfisc->mfi_io_lock); 163 return (EINVAL); 164 } 165 mtx_unlock(&mfisc->mfi_io_lock); 166 167 return (0); 168 } 169 170 static int 171 mfip_detach(device_t dev) 172 { 173 struct mfip_softc *sc; 174 175 sc = device_get_softc(dev); 176 if (sc == NULL) 177 return (EINVAL); 178 179 mtx_lock(&sc->mfi_sc->mfi_io_lock); 180 if (sc->state == MFIP_STATE_RESCAN) { 181 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 182 return (EBUSY); 183 } 184 sc->state = MFIP_STATE_DETACH; 185 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 186 187 sc->mfi_sc->mfi_cam_rescan_cb = NULL; 188 189 if (sc->sim != NULL) { 190 mtx_lock(&sc->mfi_sc->mfi_io_lock); 191 xpt_bus_deregister(cam_sim_path(sc->sim)); 192 cam_sim_free(sc->sim, FALSE); 193 sc->sim = NULL; 194 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 195 } 196 197 if (sc->devq != NULL) { 198 cam_simq_free(sc->devq); 199 sc->devq = NULL; 200 } 201 202 return (0); 203 } 204 205 static void 206 mfip_cam_action(struct cam_sim *sim, union ccb *ccb) 207 { 208 struct mfip_softc *sc = cam_sim_softc(sim); 209 struct mfi_softc *mfisc = sc->mfi_sc; 210 211 mtx_assert(&mfisc->mfi_io_lock, MA_OWNED); 212 213 switch (ccb->ccb_h.func_code) { 214 case XPT_PATH_INQ: 215 { 216 struct ccb_pathinq *cpi = &ccb->cpi; 217 218 cpi->version_num = 1; 219 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16; 220 cpi->target_sprt = 0; 221 cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN; 222 cpi->hba_eng_cnt = 0; 223 cpi->max_target = MFI_SCSI_MAX_TARGETS; 224 cpi->max_lun = MFI_SCSI_MAX_LUNS; 225 cpi->initiator_id = MFI_SCSI_INITIATOR_ID; 226 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 227 strncpy(cpi->hba_vid, "LSI", HBA_IDLEN); 228 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); 229 cpi->unit_number = cam_sim_unit(sim); 230 cpi->bus_id = cam_sim_bus(sim); 231 cpi->base_transfer_speed = 150000; 232 cpi->transport = XPORT_SAS; 233 cpi->transport_version = 0; 234 cpi->protocol = PROTO_SCSI; 235 cpi->protocol_version = SCSI_REV_2; 236 cpi->ccb_h.status = CAM_REQ_CMP; 237 break; 238 } 239 case XPT_RESET_BUS: 240 ccb->ccb_h.status = CAM_REQ_CMP; 241 break; 242 case XPT_RESET_DEV: 243 ccb->ccb_h.status = CAM_REQ_CMP; 244 break; 245 case XPT_GET_TRAN_SETTINGS: 246 { 247 struct ccb_trans_settings_sas *sas = 248 &ccb->cts.xport_specific.sas; 249 250 ccb->cts.protocol = PROTO_SCSI; 251 ccb->cts.protocol_version = SCSI_REV_2; 252 ccb->cts.transport = XPORT_SAS; 253 ccb->cts.transport_version = 0; 254 255 sas->valid &= ~CTS_SAS_VALID_SPEED; 256 sas->bitrate = 150000; 257 258 ccb->ccb_h.status = CAM_REQ_CMP; 259 break; 260 } 261 case XPT_SET_TRAN_SETTINGS: 262 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 263 break; 264 case XPT_SCSI_IO: 265 { 266 struct ccb_hdr *ccbh = &ccb->ccb_h; 267 struct ccb_scsiio *csio = &ccb->csio; 268 269 ccbh->status = CAM_REQ_INPROG; 270 if (csio->cdb_len > MFI_SCSI_MAX_CDB_LEN) { 271 ccbh->status = CAM_REQ_INVALID; 272 break; 273 } 274 ccbh->ccb_mfip_ptr = sc; 275 TAILQ_INSERT_TAIL(&mfisc->mfi_cam_ccbq, ccbh, sim_links.tqe); 276 mfi_startio(mfisc); 277 return; 278 } 279 default: 280 ccb->ccb_h.status = CAM_REQ_INVALID; 281 break; 282 } 283 284 xpt_done(ccb); 285 return; 286 } 287 288 static void 289 mfip_cam_rescan(struct mfi_softc *sc, uint32_t tid) 290 { 291 union ccb *ccb; 292 struct mfip_softc *camsc; 293 struct cam_sim *sim; 294 device_t mfip_dev; 295 296 mtx_lock(&Giant); 297 mfip_dev = device_find_child(sc->mfi_dev, "mfip", -1); 298 mtx_unlock(&Giant); 299 if (mfip_dev == NULL) { 300 device_printf(sc->mfi_dev, "Couldn't find mfip child device!\n"); 301 return; 302 } 303 304 mtx_lock(&sc->mfi_io_lock); 305 camsc = device_get_softc(mfip_dev); 306 if (camsc->state == MFIP_STATE_DETACH) { 307 mtx_unlock(&sc->mfi_io_lock); 308 return; 309 } 310 camsc->state = MFIP_STATE_RESCAN; 311 312 ccb = xpt_alloc_ccb_nowait(); 313 if (ccb == NULL) { 314 mtx_unlock(&sc->mfi_io_lock); 315 device_printf(sc->mfi_dev, 316 "Cannot allocate ccb for bus rescan.\n"); 317 return; 318 } 319 320 sim = camsc->sim; 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 xpt_rescan(ccb); 330 331 camsc->state = MFIP_STATE_NONE; 332 mtx_unlock(&sc->mfi_io_lock); 333 } 334 335 static struct mfi_command * 336 mfip_start(void *data) 337 { 338 union ccb *ccb = data; 339 struct ccb_hdr *ccbh = &ccb->ccb_h; 340 struct ccb_scsiio *csio = &ccb->csio; 341 struct mfip_softc *sc; 342 struct mfi_pass_frame *pt; 343 struct mfi_command *cm; 344 uint32_t context = 0; 345 346 sc = ccbh->ccb_mfip_ptr; 347 348 if ((cm = mfi_dequeue_free(sc->mfi_sc)) == NULL) 349 return (NULL); 350 351 /* Zero out the MFI frame */ 352 context = cm->cm_frame->header.context; 353 bzero(cm->cm_frame, sizeof(union mfi_frame)); 354 cm->cm_frame->header.context = context; 355 356 pt = &cm->cm_frame->pass; 357 pt->header.cmd = MFI_CMD_PD_SCSI_IO; 358 pt->header.cmd_status = 0; 359 pt->header.scsi_status = 0; 360 pt->header.target_id = ccbh->target_id; 361 pt->header.lun_id = ccbh->target_lun; 362 pt->header.flags = 0; 363 pt->header.timeout = 0; 364 pt->header.data_len = csio->dxfer_len; 365 pt->header.sense_len = MFI_SENSE_LEN; 366 pt->header.cdb_len = csio->cdb_len; 367 pt->sense_addr_lo = (uint32_t)cm->cm_sense_busaddr; 368 pt->sense_addr_hi = (uint32_t)((uint64_t)cm->cm_sense_busaddr >> 32); 369 if (ccbh->flags & CAM_CDB_POINTER) 370 bcopy(csio->cdb_io.cdb_ptr, &pt->cdb[0], csio->cdb_len); 371 else 372 bcopy(csio->cdb_io.cdb_bytes, &pt->cdb[0], csio->cdb_len); 373 cm->cm_complete = mfip_done; 374 cm->cm_private = ccb; 375 cm->cm_sg = &pt->sgl; 376 cm->cm_total_frame_size = MFI_PASS_FRAME_SIZE; 377 cm->cm_data = ccb; 378 cm->cm_len = csio->dxfer_len; 379 switch (ccbh->flags & CAM_DIR_MASK) { 380 case CAM_DIR_IN: 381 cm->cm_flags = MFI_CMD_DATAIN | MFI_CMD_CCB; 382 break; 383 case CAM_DIR_OUT: 384 cm->cm_flags = MFI_CMD_DATAOUT | MFI_CMD_CCB; 385 break; 386 case CAM_DIR_NONE: 387 default: 388 cm->cm_data = NULL; 389 cm->cm_len = 0; 390 cm->cm_flags = 0; 391 break; 392 } 393 394 TAILQ_REMOVE(&sc->mfi_sc->mfi_cam_ccbq, ccbh, sim_links.tqe); 395 return (cm); 396 } 397 398 static void 399 mfip_done(struct mfi_command *cm) 400 { 401 union ccb *ccb = cm->cm_private; 402 struct ccb_hdr *ccbh = &ccb->ccb_h; 403 struct ccb_scsiio *csio = &ccb->csio; 404 struct mfip_softc *sc; 405 struct mfi_pass_frame *pt; 406 407 sc = ccbh->ccb_mfip_ptr; 408 pt = &cm->cm_frame->pass; 409 410 switch (pt->header.cmd_status) { 411 case MFI_STAT_OK: 412 { 413 uint8_t command, device; 414 415 ccbh->status = CAM_REQ_CMP; 416 csio->scsi_status = pt->header.scsi_status; 417 if (ccbh->flags & CAM_CDB_POINTER) 418 command = csio->cdb_io.cdb_ptr[0]; 419 else 420 command = csio->cdb_io.cdb_bytes[0]; 421 if (command == INQUIRY) { 422 device = csio->data_ptr[0] & 0x1f; 423 if ((!mfi_allow_disks && device == T_DIRECT) || 424 (device == T_PROCESSOR)) 425 csio->data_ptr[0] = 426 (csio->data_ptr[0] & 0xe0) | T_NODEVICE; 427 } 428 break; 429 } 430 case MFI_STAT_SCSI_DONE_WITH_ERROR: 431 { 432 int sense_len; 433 434 ccbh->status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID; 435 csio->scsi_status = pt->header.scsi_status; 436 if (pt->header.sense_len < csio->sense_len) 437 csio->sense_resid = csio->sense_len - 438 pt->header.sense_len; 439 else 440 csio->sense_resid = 0; 441 sense_len = min(pt->header.sense_len, 442 sizeof(struct scsi_sense_data)); 443 bzero(&csio->sense_data, sizeof(struct scsi_sense_data)); 444 bcopy(&cm->cm_sense->data[0], &csio->sense_data, sense_len); 445 break; 446 } 447 case MFI_STAT_DEVICE_NOT_FOUND: 448 ccbh->status = CAM_SEL_TIMEOUT; 449 break; 450 case MFI_STAT_SCSI_IO_FAILED: 451 ccbh->status = CAM_REQ_CMP_ERR; 452 csio->scsi_status = pt->header.scsi_status; 453 break; 454 default: 455 ccbh->status = CAM_REQ_CMP_ERR; 456 csio->scsi_status = pt->header.scsi_status; 457 break; 458 } 459 460 mfi_release_command(cm); 461 xpt_done(ccb); 462 } 463 464 static void 465 mfip_cam_poll(struct cam_sim *sim) 466 { 467 struct mfip_softc *sc = cam_sim_softc(sim); 468 struct mfi_softc *mfisc = sc->mfi_sc; 469 470 mfisc->mfi_intr_ptr(mfisc); 471 } 472
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