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