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), 102 103 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 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 cam_simq_free(sc->devq); 159 mtx_unlock(&mfisc->mfi_io_lock); 160 return (EINVAL); 161 } 162 mtx_unlock(&mfisc->mfi_io_lock); 163 164 return (0); 165 } 166 167 static int 168 mfip_detach(device_t dev) 169 { 170 struct mfip_softc *sc; 171 172 sc = device_get_softc(dev); 173 if (sc == NULL) 174 return (EINVAL); 175 176 mtx_lock(&sc->mfi_sc->mfi_io_lock); 177 if (sc->state == MFIP_STATE_RESCAN) { 178 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 179 return (EBUSY); 180 } 181 sc->state = MFIP_STATE_DETACH; 182 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 183 184 sc->mfi_sc->mfi_cam_rescan_cb = NULL; 185 186 if (sc->sim != NULL) { 187 mtx_lock(&sc->mfi_sc->mfi_io_lock); 188 xpt_bus_deregister(cam_sim_path(sc->sim)); 189 cam_sim_free(sc->sim, FALSE); 190 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 191 } 192 193 if (sc->devq != NULL) 194 cam_simq_free(sc->devq); 195 196 return (0); 197 } 198 199 static void 200 mfip_cam_action(struct cam_sim *sim, union ccb *ccb) 201 { 202 struct mfip_softc *sc = cam_sim_softc(sim); 203 struct mfi_softc *mfisc = sc->mfi_sc; 204 205 mtx_assert(&mfisc->mfi_io_lock, MA_OWNED); 206 207 switch (ccb->ccb_h.func_code) { 208 case XPT_PATH_INQ: 209 { 210 struct ccb_pathinq *cpi = &ccb->cpi; 211 212 cpi->version_num = 1; 213 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16; 214 cpi->target_sprt = 0; 215 cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN; 216 cpi->hba_eng_cnt = 0; 217 cpi->max_target = MFI_SCSI_MAX_TARGETS; 218 cpi->max_lun = MFI_SCSI_MAX_LUNS; 219 cpi->initiator_id = MFI_SCSI_INITIATOR_ID; 220 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 221 strncpy(cpi->hba_vid, "LSI", HBA_IDLEN); 222 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); 223 cpi->unit_number = cam_sim_unit(sim); 224 cpi->bus_id = cam_sim_bus(sim); 225 cpi->base_transfer_speed = 150000; 226 cpi->transport = XPORT_SAS; 227 cpi->transport_version = 0; 228 cpi->protocol = PROTO_SCSI; 229 cpi->protocol_version = SCSI_REV_2; 230 cpi->ccb_h.status = CAM_REQ_CMP; 231 break; 232 } 233 case XPT_RESET_BUS: 234 ccb->ccb_h.status = CAM_REQ_CMP; 235 break; 236 case XPT_RESET_DEV: 237 ccb->ccb_h.status = CAM_REQ_CMP; 238 break; 239 case XPT_GET_TRAN_SETTINGS: 240 { 241 struct ccb_trans_settings_sas *sas = 242 &ccb->cts.xport_specific.sas; 243 244 ccb->cts.protocol = PROTO_SCSI; 245 ccb->cts.protocol_version = SCSI_REV_2; 246 ccb->cts.transport = XPORT_SAS; 247 ccb->cts.transport_version = 0; 248 249 sas->valid &= ~CTS_SAS_VALID_SPEED; 250 sas->bitrate = 150000; 251 252 ccb->ccb_h.status = CAM_REQ_CMP; 253 break; 254 } 255 case XPT_SET_TRAN_SETTINGS: 256 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 257 break; 258 case XPT_SCSI_IO: 259 { 260 struct ccb_hdr *ccbh = &ccb->ccb_h; 261 struct ccb_scsiio *csio = &ccb->csio; 262 263 ccbh->status = CAM_REQ_INPROG; 264 if (csio->cdb_len > MFI_SCSI_MAX_CDB_LEN) { 265 ccbh->status = CAM_REQ_INVALID; 266 break; 267 } 268 ccbh->ccb_mfip_ptr = sc; 269 TAILQ_INSERT_TAIL(&mfisc->mfi_cam_ccbq, ccbh, sim_links.tqe); 270 mfi_startio(mfisc); 271 return; 272 } 273 default: 274 ccb->ccb_h.status = CAM_REQ_INVALID; 275 break; 276 } 277 278 xpt_done(ccb); 279 return; 280 } 281 282 static void 283 mfip_cam_rescan(struct mfi_softc *sc, uint32_t tid) 284 { 285 union ccb *ccb; 286 struct mfip_softc *camsc; 287 struct cam_sim *sim; 288 device_t mfip_dev; 289 290 mtx_lock(&Giant); 291 mfip_dev = device_find_child(sc->mfi_dev, "mfip", -1); 292 mtx_unlock(&Giant); 293 if (mfip_dev == NULL) { 294 device_printf(sc->mfi_dev, "Couldn't find mfip child device!\n"); 295 return; 296 } 297 298 mtx_lock(&sc->mfi_io_lock); 299 camsc = device_get_softc(mfip_dev); 300 if (camsc->state == MFIP_STATE_DETACH) { 301 mtx_unlock(&sc->mfi_io_lock); 302 return; 303 } 304 camsc->state = MFIP_STATE_RESCAN; 305 mtx_unlock(&sc->mfi_io_lock); 306 307 ccb = xpt_alloc_ccb_nowait(); 308 if (ccb == NULL) { 309 device_printf(sc->mfi_dev, 310 "Cannot allocate ccb for bus rescan.\n"); 311 return; 312 } 313 314 sim = camsc->sim; 315 if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, cam_sim_path(sim), 316 tid, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 317 xpt_free_ccb(ccb); 318 device_printf(sc->mfi_dev, 319 "Cannot create path for bus rescan.\n"); 320 return; 321 } 322 323 xpt_rescan(ccb); 324 325 mtx_lock(&sc->mfi_io_lock); 326 camsc->state = MFIP_STATE_NONE; 327 mtx_unlock(&sc->mfi_io_lock); 328 } 329 330 static struct mfi_command * 331 mfip_start(void *data) 332 { 333 union ccb *ccb = data; 334 struct ccb_hdr *ccbh = &ccb->ccb_h; 335 struct ccb_scsiio *csio = &ccb->csio; 336 struct mfip_softc *sc; 337 struct mfi_pass_frame *pt; 338 struct mfi_command *cm; 339 uint32_t context = 0; 340 341 sc = ccbh->ccb_mfip_ptr; 342 343 if ((cm = mfi_dequeue_free(sc->mfi_sc)) == NULL) 344 return (NULL); 345 346 /* Zero out the MFI frame */ 347 context = cm->cm_frame->header.context; 348 bzero(cm->cm_frame, sizeof(union mfi_frame)); 349 cm->cm_frame->header.context = context; 350 351 pt = &cm->cm_frame->pass; 352 pt->header.cmd = MFI_CMD_PD_SCSI_IO; 353 pt->header.cmd_status = 0; 354 pt->header.scsi_status = 0; 355 pt->header.target_id = ccbh->target_id; 356 pt->header.lun_id = ccbh->target_lun; 357 pt->header.flags = 0; 358 pt->header.timeout = 0; 359 pt->header.data_len = csio->dxfer_len; 360 pt->header.sense_len = MFI_SENSE_LEN; 361 pt->header.cdb_len = csio->cdb_len; 362 pt->sense_addr_lo = (uint32_t)cm->cm_sense_busaddr; 363 pt->sense_addr_hi = (uint32_t)((uint64_t)cm->cm_sense_busaddr >> 32); 364 if (ccbh->flags & CAM_CDB_POINTER) 365 bcopy(csio->cdb_io.cdb_ptr, &pt->cdb[0], csio->cdb_len); 366 else 367 bcopy(csio->cdb_io.cdb_bytes, &pt->cdb[0], csio->cdb_len); 368 cm->cm_complete = mfip_done; 369 cm->cm_private = ccb; 370 cm->cm_sg = &pt->sgl; 371 cm->cm_total_frame_size = MFI_PASS_FRAME_SIZE; 372 cm->cm_data = ccb; 373 cm->cm_len = csio->dxfer_len; 374 switch (ccbh->flags & CAM_DIR_MASK) { 375 case CAM_DIR_IN: 376 cm->cm_flags = MFI_CMD_DATAIN | MFI_CMD_CCB; 377 break; 378 case CAM_DIR_OUT: 379 cm->cm_flags = MFI_CMD_DATAOUT | MFI_CMD_CCB; 380 break; 381 case CAM_DIR_NONE: 382 default: 383 cm->cm_data = NULL; 384 cm->cm_len = 0; 385 cm->cm_flags = 0; 386 break; 387 } 388 389 TAILQ_REMOVE(&sc->mfi_sc->mfi_cam_ccbq, ccbh, sim_links.tqe); 390 return (cm); 391 } 392 393 static void 394 mfip_done(struct mfi_command *cm) 395 { 396 union ccb *ccb = cm->cm_private; 397 struct ccb_hdr *ccbh = &ccb->ccb_h; 398 struct ccb_scsiio *csio = &ccb->csio; 399 struct mfip_softc *sc; 400 struct mfi_pass_frame *pt; 401 402 sc = ccbh->ccb_mfip_ptr; 403 pt = &cm->cm_frame->pass; 404 405 switch (pt->header.cmd_status) { 406 case MFI_STAT_OK: 407 { 408 uint8_t command, device; 409 410 ccbh->status = CAM_REQ_CMP; 411 csio->scsi_status = pt->header.scsi_status; 412 if (ccbh->flags & CAM_CDB_POINTER) 413 command = csio->cdb_io.cdb_ptr[0]; 414 else 415 command = csio->cdb_io.cdb_bytes[0]; 416 if (command == INQUIRY) { 417 device = csio->data_ptr[0] & 0x1f; 418 if ((!mfi_allow_disks && device == T_DIRECT) || 419 (device == T_PROCESSOR)) 420 csio->data_ptr[0] = 421 (csio->data_ptr[0] & 0xe0) | T_NODEVICE; 422 } 423 break; 424 } 425 case MFI_STAT_SCSI_DONE_WITH_ERROR: 426 { 427 int sense_len; 428 429 ccbh->status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID; 430 csio->scsi_status = pt->header.scsi_status; 431 if (pt->header.sense_len < csio->sense_len) 432 csio->sense_resid = csio->sense_len - 433 pt->header.sense_len; 434 else 435 csio->sense_resid = 0; 436 sense_len = min(pt->header.sense_len, 437 sizeof(struct scsi_sense_data)); 438 bzero(&csio->sense_data, sizeof(struct scsi_sense_data)); 439 bcopy(&cm->cm_sense->data[0], &csio->sense_data, sense_len); 440 break; 441 } 442 case MFI_STAT_DEVICE_NOT_FOUND: 443 ccbh->status = CAM_SEL_TIMEOUT; 444 break; 445 case MFI_STAT_SCSI_IO_FAILED: 446 ccbh->status = CAM_REQ_CMP_ERR; 447 csio->scsi_status = pt->header.scsi_status; 448 break; 449 default: 450 ccbh->status = CAM_REQ_CMP_ERR; 451 csio->scsi_status = pt->header.scsi_status; 452 break; 453 } 454 455 mfi_release_command(cm); 456 xpt_done(ccb); 457 } 458 459 static void 460 mfip_cam_poll(struct cam_sim *sim) 461 { 462 struct mfip_softc *sc = cam_sim_softc(sim); 463 struct mfi_softc *mfisc = sc->mfi_sc; 464 465 mfisc->mfi_intr_ptr(mfisc); 466 } 467 468