mfi_cam.c revision 315812
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: stable/11/sys/dev/mfi/mfi_cam.c 315812 2017-03-23 06:40:20Z 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 68enum mfip_state { 69 MFIP_STATE_NONE, 70 MFIP_STATE_DETACH, 71 MFIP_STATE_RESCAN 72}; 73 74struct 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 83static int mfip_probe(device_t); 84static int mfip_attach(device_t); 85static int mfip_detach(device_t); 86static void mfip_cam_action(struct cam_sim *, union ccb *); 87static void mfip_cam_poll(struct cam_sim *); 88static void mfip_cam_rescan(struct mfi_softc *, uint32_t tid); 89static struct mfi_command * mfip_start(void *); 90static void mfip_done(struct mfi_command *cm); 91 92static int mfi_allow_disks = 0; 93SYSCTL_INT(_hw_mfi, OID_AUTO, allow_cam_disk_passthrough, CTLFLAG_RDTUN, 94 &mfi_allow_disks, 0, "event message locale"); 95 96static devclass_t mfip_devclass; 97static 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}; 104static driver_t mfip_driver = { 105 "mfip", 106 mfip_methods, 107 sizeof(struct mfip_softc) 108}; 109DRIVER_MODULE(mfip, mfi, mfip_driver, mfip_devclass, 0, 0); 110MODULE_DEPEND(mfip, cam, 1, 1, 1); 111MODULE_DEPEND(mfip, mfi, 1, 1, 1); 112 113#define ccb_mfip_ptr sim_priv.entries[0].ptr 114 115static int 116mfip_probe(device_t dev) 117{ 118 119 device_set_desc(dev, "SCSI Passthrough Bus"); 120 return (0); 121} 122 123static int 124mfip_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 169static int 170mfip_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 204static void 205mfip_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_TAG_ABLE; 219 cpi->target_sprt = 0; 220 cpi->hba_misc = PIM_NOBUSRESET | PIM_SEQSCAN | PIM_UNMAPPED; 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 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 226 strlcpy(cpi->hba_vid, "LSI", HBA_IDLEN); 227 strlcpy(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_scsi *scsi = 247 &ccb->cts.proto_specific.scsi; 248 struct ccb_trans_settings_sas *sas = 249 &ccb->cts.xport_specific.sas; 250 251 ccb->cts.protocol = PROTO_SCSI; 252 ccb->cts.protocol_version = SCSI_REV_2; 253 ccb->cts.transport = XPORT_SAS; 254 ccb->cts.transport_version = 0; 255 256 scsi->valid = CTS_SCSI_VALID_TQ; 257 scsi->flags = CTS_SCSI_FLAGS_TAG_ENB; 258 259 sas->valid &= ~CTS_SAS_VALID_SPEED; 260 sas->bitrate = 150000; 261 262 ccb->ccb_h.status = CAM_REQ_CMP; 263 break; 264 } 265 case XPT_SET_TRAN_SETTINGS: 266 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 267 break; 268 case XPT_SCSI_IO: 269 { 270 struct ccb_hdr *ccbh = &ccb->ccb_h; 271 struct ccb_scsiio *csio = &ccb->csio; 272 273 ccbh->status = CAM_REQ_INPROG; 274 if (csio->cdb_len > MFI_SCSI_MAX_CDB_LEN) { 275 ccbh->status = CAM_REQ_INVALID; 276 break; 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 292static void 293mfip_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; 315 316 ccb = xpt_alloc_ccb_nowait(); 317 if (ccb == NULL) { 318 mtx_unlock(&sc->mfi_io_lock); 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, NULL, cam_sim_path(sim), 326 tid, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { 327 xpt_free_ccb(ccb); 328 mtx_unlock(&sc->mfi_io_lock); 329 device_printf(sc->mfi_dev, 330 "Cannot create path for bus rescan.\n"); 331 return; 332 } 333 xpt_rescan(ccb); 334 335 camsc->state = MFIP_STATE_NONE; 336 mtx_unlock(&sc->mfi_io_lock); 337} 338 339static struct mfi_command * 340mfip_start(void *data) 341{ 342 union ccb *ccb = data; 343 struct ccb_hdr *ccbh = &ccb->ccb_h; 344 struct ccb_scsiio *csio = &ccb->csio; 345 struct mfip_softc *sc; 346 struct mfi_pass_frame *pt; 347 struct mfi_command *cm; 348 uint32_t context = 0; 349 350 sc = ccbh->ccb_mfip_ptr; 351 352 if ((cm = mfi_dequeue_free(sc->mfi_sc)) == NULL) 353 return (NULL); 354 355 /* Zero out the MFI frame */ 356 context = cm->cm_frame->header.context; 357 bzero(cm->cm_frame, sizeof(union mfi_frame)); 358 cm->cm_frame->header.context = context; 359 360 pt = &cm->cm_frame->pass; 361 pt->header.cmd = MFI_CMD_PD_SCSI_IO; 362 pt->header.cmd_status = 0; 363 pt->header.scsi_status = 0; 364 pt->header.target_id = ccbh->target_id; 365 pt->header.lun_id = ccbh->target_lun; 366 pt->header.flags = 0; 367 pt->header.timeout = 0; 368 pt->header.data_len = csio->dxfer_len; 369 pt->header.sense_len = MFI_SENSE_LEN; 370 pt->header.cdb_len = csio->cdb_len; 371 pt->sense_addr_lo = (uint32_t)cm->cm_sense_busaddr; 372 pt->sense_addr_hi = (uint32_t)((uint64_t)cm->cm_sense_busaddr >> 32); 373 if (ccbh->flags & CAM_CDB_POINTER) 374 bcopy(csio->cdb_io.cdb_ptr, &pt->cdb[0], csio->cdb_len); 375 else 376 bcopy(csio->cdb_io.cdb_bytes, &pt->cdb[0], csio->cdb_len); 377 cm->cm_complete = mfip_done; 378 cm->cm_private = ccb; 379 cm->cm_sg = &pt->sgl; 380 cm->cm_total_frame_size = MFI_PASS_FRAME_SIZE; 381 cm->cm_data = ccb; 382 cm->cm_len = csio->dxfer_len; 383 switch (ccbh->flags & CAM_DIR_MASK) { 384 case CAM_DIR_IN: 385 cm->cm_flags = MFI_CMD_DATAIN | MFI_CMD_CCB; 386 break; 387 case CAM_DIR_OUT: 388 cm->cm_flags = MFI_CMD_DATAOUT | MFI_CMD_CCB; 389 break; 390 case CAM_DIR_NONE: 391 default: 392 cm->cm_data = NULL; 393 cm->cm_len = 0; 394 cm->cm_flags = 0; 395 break; 396 } 397 398 TAILQ_REMOVE(&sc->mfi_sc->mfi_cam_ccbq, ccbh, sim_links.tqe); 399 return (cm); 400} 401 402static void 403mfip_done(struct mfi_command *cm) 404{ 405 union ccb *ccb = cm->cm_private; 406 struct ccb_hdr *ccbh = &ccb->ccb_h; 407 struct ccb_scsiio *csio = &ccb->csio; 408 struct mfip_softc *sc; 409 struct mfi_pass_frame *pt; 410 411 sc = ccbh->ccb_mfip_ptr; 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 468static void 469mfip_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} 476 477