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 <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 device_printf(dev, "CAM SIM attach failed\n"); 148 return (EINVAL); 149 } 150 151 mfisc->mfi_cam_rescan_cb = mfip_cam_rescan; 152 153 mtx_lock(&mfisc->mfi_io_lock); 154 if (xpt_bus_register(sc->sim, dev, 0) != 0) { 155 device_printf(dev, "XPT bus registration failed\n"); 156 cam_sim_free(sc->sim, FALSE); 157 cam_simq_free(sc->devq); 158 mtx_unlock(&mfisc->mfi_io_lock); 159 return (EINVAL); 160 } 161 mtx_unlock(&mfisc->mfi_io_lock); 162 163 return (0); 164 } 165 166 static int 167 mfip_detach(device_t dev) 168 { 169 struct mfip_softc *sc; 170 171 sc = device_get_softc(dev); 172 if (sc == NULL) 173 return (EINVAL); 174 175 mtx_lock(&sc->mfi_sc->mfi_io_lock); 176 if (sc->state == MFIP_STATE_RESCAN) { 177 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 178 return (EBUSY); 179 } 180 sc->state = MFIP_STATE_DETACH; 181 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 182 183 sc->mfi_sc->mfi_cam_rescan_cb = NULL; 184 185 if (sc->sim != NULL) { 186 mtx_lock(&sc->mfi_sc->mfi_io_lock); 187 xpt_bus_deregister(cam_sim_path(sc->sim)); 188 cam_sim_free(sc->sim, FALSE); 189 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 190 } 191 192 if (sc->devq != NULL) 193 cam_simq_free(sc->devq); 194 195 return (0); 196 } 197 198 static void 199 mfip_cam_action(struct cam_sim *sim, union ccb *ccb) 200 { 201 struct mfip_softc *sc = cam_sim_softc(sim); 202 struct mfi_softc *mfisc = sc->mfi_sc; 203 204 mtx_assert(&mfisc->mfi_io_lock, MA_OWNED); 205 206 switch (ccb->ccb_h.func_code) { 207 case XPT_PATH_INQ: 208 { 209 struct ccb_pathinq *cpi = &ccb->cpi; 210 211 cpi->version_num = 1; 212 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16; 213 cpi->target_sprt = 0; 214 cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN; 215 cpi->hba_eng_cnt = 0; 216 cpi->max_target = MFI_SCSI_MAX_TARGETS; 217 cpi->max_lun = MFI_SCSI_MAX_LUNS; 218 cpi->initiator_id = MFI_SCSI_INITIATOR_ID; 219 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 220 strncpy(cpi->hba_vid, "LSI", HBA_IDLEN); 221 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); 222 cpi->unit_number = cam_sim_unit(sim); 223 cpi->bus_id = cam_sim_bus(sim); 224 cpi->base_transfer_speed = 150000; 225 cpi->transport = XPORT_SAS; 226 cpi->transport_version = 0; 227 cpi->protocol = PROTO_SCSI; 228 cpi->protocol_version = SCSI_REV_2; 229 cpi->ccb_h.status = CAM_REQ_CMP; 230 break; 231 } 232 case XPT_RESET_BUS: 233 ccb->ccb_h.status = CAM_REQ_CMP; 234 break; 235 case XPT_RESET_DEV: 236 ccb->ccb_h.status = CAM_REQ_CMP; 237 break; 238 case XPT_GET_TRAN_SETTINGS: 239 { 240 struct ccb_trans_settings_sas *sas = 241 &ccb->cts.xport_specific.sas; 242 243 ccb->cts.protocol = PROTO_SCSI; 244 ccb->cts.protocol_version = SCSI_REV_2; 245 ccb->cts.transport = XPORT_SAS; 246 ccb->cts.transport_version = 0; 247 248 sas->valid &= ~CTS_SAS_VALID_SPEED; 249 sas->bitrate = 150000; 250 251 ccb->ccb_h.status = CAM_REQ_CMP; 252 break; 253 } 254 case XPT_SET_TRAN_SETTINGS: 255 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 256 break; 257 case XPT_SCSI_IO: 258 { 259 struct ccb_hdr *ccbh = &ccb->ccb_h; 260 struct ccb_scsiio *csio = &ccb->csio; 261 262 ccbh->status = CAM_REQ_INPROG; 263 if (csio->cdb_len > MFI_SCSI_MAX_CDB_LEN) { 264 ccbh->status = CAM_REQ_INVALID; 265 break; 266 } 267 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) { 268 if (ccbh->flags & CAM_DATA_PHYS) { 269 ccbh->status = CAM_REQ_INVALID; 270 break; 271 } 272 if (ccbh->flags & CAM_SCATTER_VALID) { 273 ccbh->status = CAM_REQ_INVALID; 274 break; 275 } 276 } 277 278 ccbh->ccb_mfip_ptr = sc; 279 TAILQ_INSERT_TAIL(&mfisc->mfi_cam_ccbq, ccbh, sim_links.tqe); 280 mfi_startio(mfisc); 281 return; 282 } 283 default: 284 ccb->ccb_h.status = CAM_REQ_INVALID; 285 break; 286 } 287 288 xpt_done(ccb); 289 return; 290 } 291 292 static void 293 mfip_cam_rescan(struct mfi_softc *sc, uint32_t tid) 294 { 295 union ccb *ccb; 296 struct mfip_softc *camsc; 297 struct cam_sim *sim; 298 device_t mfip_dev; 299 300 mtx_lock(&Giant); 301 mfip_dev = device_find_child(sc->mfi_dev, "mfip", -1); 302 mtx_unlock(&Giant); 303 if (mfip_dev == NULL) { 304 device_printf(sc->mfi_dev, "Couldn't find mfip child device!\n"); 305 return; 306 } 307 308 mtx_lock(&sc->mfi_io_lock); 309 camsc = device_get_softc(mfip_dev); 310 if (camsc->state == MFIP_STATE_DETACH) { 311 mtx_unlock(&sc->mfi_io_lock); 312 return; 313 } 314 camsc->state = MFIP_STATE_RESCAN; 315 mtx_unlock(&sc->mfi_io_lock); 316 317 ccb = xpt_alloc_ccb_nowait(); 318 if (ccb == NULL) { 319 device_printf(sc->mfi_dev, 320 "Cannot allocate ccb for bus rescan.\n"); 321 return; 322 } 323 324 sim = camsc->sim; 325 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, cam_sim_path(sim), 326 tid, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 327 xpt_free_ccb(ccb); 328 device_printf(sc->mfi_dev, 329 "Cannot create path for bus rescan.\n"); 330 return; 331 } 332 333 xpt_rescan(ccb); 334 335 mtx_lock(&sc->mfi_io_lock); 336 camsc->state = MFIP_STATE_NONE; 337 mtx_unlock(&sc->mfi_io_lock); 338 } 339 340 static struct mfi_command * 341 mfip_start(void *data) 342 { 343 union ccb *ccb = data; 344 struct ccb_hdr *ccbh = &ccb->ccb_h; 345 struct ccb_scsiio *csio = &ccb->csio; 346 struct mfip_softc *sc; 347 struct mfi_pass_frame *pt; 348 struct mfi_command *cm; 349 uint32_t context = 0; 350 351 sc = ccbh->ccb_mfip_ptr; 352 353 if ((cm = mfi_dequeue_free(sc->mfi_sc)) == NULL) 354 return (NULL); 355 356 /* Zero out the MFI frame */ 357 context = cm->cm_frame->header.context; 358 bzero(cm->cm_frame, sizeof(union mfi_frame)); 359 cm->cm_frame->header.context = context; 360 361 pt = &cm->cm_frame->pass; 362 pt->header.cmd = MFI_CMD_PD_SCSI_IO; 363 pt->header.cmd_status = 0; 364 pt->header.scsi_status = 0; 365 pt->header.target_id = ccbh->target_id; 366 pt->header.lun_id = ccbh->target_lun; 367 pt->header.flags = 0; 368 pt->header.timeout = 0; 369 pt->header.data_len = csio->dxfer_len; 370 pt->header.sense_len = MFI_SENSE_LEN; 371 pt->header.cdb_len = csio->cdb_len; 372 pt->sense_addr_lo = (uint32_t)cm->cm_sense_busaddr; 373 pt->sense_addr_hi = (uint32_t)((uint64_t)cm->cm_sense_busaddr >> 32); 374 if (ccbh->flags & CAM_CDB_POINTER) 375 bcopy(csio->cdb_io.cdb_ptr, &pt->cdb[0], csio->cdb_len); 376 else 377 bcopy(csio->cdb_io.cdb_bytes, &pt->cdb[0], csio->cdb_len); 378 cm->cm_complete = mfip_done; 379 cm->cm_private = ccb; 380 cm->cm_sg = &pt->sgl; 381 cm->cm_total_frame_size = MFI_PASS_FRAME_SIZE; 382 cm->cm_data = csio->data_ptr; 383 cm->cm_len = csio->dxfer_len; 384 switch (ccbh->flags & CAM_DIR_MASK) { 385 case CAM_DIR_IN: 386 cm->cm_flags = MFI_CMD_DATAIN; 387 break; 388 case CAM_DIR_OUT: 389 cm->cm_flags = MFI_CMD_DATAOUT; 390 break; 391 case CAM_DIR_NONE: 392 default: 393 cm->cm_data = NULL; 394 cm->cm_len = 0; 395 cm->cm_flags = 0; 396 break; 397 } 398 399 TAILQ_REMOVE(&sc->mfi_sc->mfi_cam_ccbq, ccbh, sim_links.tqe); 400 return (cm); 401 } 402 403 static void 404 mfip_done(struct mfi_command *cm) 405 { 406 union ccb *ccb = cm->cm_private; 407 struct ccb_hdr *ccbh = &ccb->ccb_h; 408 struct ccb_scsiio *csio = &ccb->csio; 409 struct mfip_softc *sc; 410 struct mfi_pass_frame *pt; 411 412 sc = ccbh->ccb_mfip_ptr; 413 pt = &cm->cm_frame->pass; 414 415 switch (pt->header.cmd_status) { 416 case MFI_STAT_OK: 417 { 418 uint8_t command, device; 419 420 ccbh->status = CAM_REQ_CMP; 421 csio->scsi_status = pt->header.scsi_status; 422 if (ccbh->flags & CAM_CDB_POINTER) 423 command = csio->cdb_io.cdb_ptr[0]; 424 else 425 command = csio->cdb_io.cdb_bytes[0]; 426 if (command == INQUIRY) { 427 device = csio->data_ptr[0] & 0x1f; 428 if ((!mfi_allow_disks && device == T_DIRECT) || 429 (device == T_PROCESSOR)) 430 csio->data_ptr[0] = 431 (csio->data_ptr[0] & 0xe0) | T_NODEVICE; 432 } 433 break; 434 } 435 case MFI_STAT_SCSI_DONE_WITH_ERROR: 436 { 437 int sense_len; 438 439 ccbh->status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID; 440 csio->scsi_status = pt->header.scsi_status; 441 if (pt->header.sense_len < csio->sense_len) 442 csio->sense_resid = csio->sense_len - 443 pt->header.sense_len; 444 else 445 csio->sense_resid = 0; 446 sense_len = min(pt->header.sense_len, 447 sizeof(struct scsi_sense_data)); 448 bzero(&csio->sense_data, sizeof(struct scsi_sense_data)); 449 bcopy(&cm->cm_sense->data[0], &csio->sense_data, sense_len); 450 break; 451 } 452 case MFI_STAT_DEVICE_NOT_FOUND: 453 ccbh->status = CAM_SEL_TIMEOUT; 454 break; 455 case MFI_STAT_SCSI_IO_FAILED: 456 ccbh->status = CAM_REQ_CMP_ERR; 457 csio->scsi_status = pt->header.scsi_status; 458 break; 459 default: 460 ccbh->status = CAM_REQ_CMP_ERR; 461 csio->scsi_status = pt->header.scsi_status; 462 break; 463 } 464 465 mfi_release_command(cm); 466 xpt_done(ccb); 467 } 468 469 static void 470 mfip_cam_poll(struct cam_sim *sim) 471 { 472 struct mfip_softc *sc = cam_sim_softc(sim); 473 struct mfi_softc *mfisc = sc->mfi_sc; 474 475 mfisc->mfi_intr_ptr(mfisc); 476 } 477 478