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/9.0/sys/dev/mfi/mfi_cam.c 226910 2011-10-29 22:06:53Z marius $"); 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 49 #include <cam/cam.h> 50 #include <cam/cam_ccb.h> 51 #include <cam/cam_debug.h> 52 #include <cam/cam_sim.h> 53 #include <cam/cam_xpt_sim.h> 54 #include <cam/scsi/scsi_all.h> 55 #include <cam/scsi/scsi_message.h> 56 57 #include <machine/md_var.h> 58 #include <machine/bus.h> 59 #include <machine/resource.h> 60 61 #include <dev/mfi/mfireg.h> 62 #include <dev/mfi/mfi_ioctl.h> 63 #include <dev/mfi/mfivar.h> 64 65 struct mfip_softc { 66 device_t dev; 67 struct mfi_softc *mfi_sc; 68 struct cam_devq *devq; 69 struct cam_sim *sim; 70 struct cam_path *path; 71 }; 72 73 static int mfip_probe(device_t); 74 static int mfip_attach(device_t); 75 static int mfip_detach(device_t); 76 static void mfip_cam_action(struct cam_sim *, union ccb *); 77 static void mfip_cam_poll(struct cam_sim *); 78 static struct mfi_command * mfip_start(void *); 79 static void mfip_done(struct mfi_command *cm); 80 81 static devclass_t mfip_devclass; 82 static device_method_t mfip_methods[] = { 83 DEVMETHOD(device_probe, mfip_probe), 84 DEVMETHOD(device_attach, mfip_attach), 85 DEVMETHOD(device_detach, mfip_detach), 86 {0, 0} 87 }; 88 static driver_t mfip_driver = { 89 "mfip", 90 mfip_methods, 91 sizeof(struct mfip_softc) 92 }; 93 DRIVER_MODULE(mfip, mfi, mfip_driver, mfip_devclass, 0, 0); 94 MODULE_DEPEND(mfip, cam, 1, 1, 1); 95 MODULE_DEPEND(mfip, mfi, 1, 1, 1); 96 97 #define ccb_mfip_ptr sim_priv.entries[0].ptr 98 99 static int 100 mfip_probe(device_t dev) 101 { 102 103 device_set_desc(dev, "SCSI Passthrough Bus"); 104 return (0); 105 } 106 107 static int 108 mfip_attach(device_t dev) 109 { 110 struct mfip_softc *sc; 111 struct mfi_softc *mfisc; 112 113 sc = device_get_softc(dev); 114 if (sc == NULL) 115 return (EINVAL); 116 117 mfisc = device_get_softc(device_get_parent(dev)); 118 sc->dev = dev; 119 sc->mfi_sc = mfisc; 120 mfisc->mfi_cam_start = mfip_start; 121 122 if ((sc->devq = cam_simq_alloc(MFI_SCSI_MAX_CMDS)) == NULL) 123 return (ENOMEM); 124 125 sc->sim = cam_sim_alloc(mfip_cam_action, mfip_cam_poll, "mfi", sc, 126 device_get_unit(dev), &mfisc->mfi_io_lock, 1, 127 MFI_SCSI_MAX_CMDS, sc->devq); 128 if (sc->sim == NULL) { 129 cam_simq_free(sc->devq); 130 device_printf(dev, "CAM SIM attach failed\n"); 131 return (EINVAL); 132 } 133 134 mtx_lock(&mfisc->mfi_io_lock); 135 if (xpt_bus_register(sc->sim, dev, 0) != 0) { 136 device_printf(dev, "XPT bus registration failed\n"); 137 cam_sim_free(sc->sim, FALSE); 138 cam_simq_free(sc->devq); 139 mtx_unlock(&mfisc->mfi_io_lock); 140 return (EINVAL); 141 } 142 mtx_unlock(&mfisc->mfi_io_lock); 143 144 return (0); 145 } 146 147 static int 148 mfip_detach(device_t dev) 149 { 150 struct mfip_softc *sc; 151 152 sc = device_get_softc(dev); 153 if (sc == NULL) 154 return (EINVAL); 155 156 if (sc->sim != NULL) { 157 mtx_lock(&sc->mfi_sc->mfi_io_lock); 158 xpt_bus_deregister(cam_sim_path(sc->sim)); 159 cam_sim_free(sc->sim, FALSE); 160 mtx_unlock(&sc->mfi_sc->mfi_io_lock); 161 } 162 163 if (sc->devq != NULL) 164 cam_simq_free(sc->devq); 165 166 return (0); 167 } 168 169 static void 170 mfip_cam_action(struct cam_sim *sim, union ccb *ccb) 171 { 172 struct mfip_softc *sc = cam_sim_softc(sim); 173 struct mfi_softc *mfisc = sc->mfi_sc; 174 175 mtx_assert(&mfisc->mfi_io_lock, MA_OWNED); 176 177 switch (ccb->ccb_h.func_code) { 178 case XPT_PATH_INQ: 179 { 180 struct ccb_pathinq *cpi = &ccb->cpi; 181 182 cpi->version_num = 1; 183 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16; 184 cpi->target_sprt = 0; 185 cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN; 186 cpi->hba_eng_cnt = 0; 187 cpi->max_target = MFI_SCSI_MAX_TARGETS; 188 cpi->max_lun = MFI_SCSI_MAX_LUNS; 189 cpi->initiator_id = MFI_SCSI_INITIATOR_ID; 190 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 191 strncpy(cpi->hba_vid, "LSI", HBA_IDLEN); 192 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); 193 cpi->unit_number = cam_sim_unit(sim); 194 cpi->bus_id = cam_sim_bus(sim); 195 cpi->base_transfer_speed = 150000; 196 cpi->transport = XPORT_SAS; 197 cpi->transport_version = 0; 198 cpi->protocol = PROTO_SCSI; 199 cpi->protocol_version = SCSI_REV_2; 200 cpi->ccb_h.status = CAM_REQ_CMP; 201 break; 202 } 203 case XPT_RESET_BUS: 204 ccb->ccb_h.status = CAM_REQ_CMP; 205 break; 206 case XPT_RESET_DEV: 207 ccb->ccb_h.status = CAM_REQ_CMP; 208 break; 209 case XPT_GET_TRAN_SETTINGS: 210 { 211 struct ccb_trans_settings_sas *sas = 212 &ccb->cts.xport_specific.sas; 213 214 ccb->cts.protocol = PROTO_SCSI; 215 ccb->cts.protocol_version = SCSI_REV_2; 216 ccb->cts.transport = XPORT_SAS; 217 ccb->cts.transport_version = 0; 218 219 sas->valid &= ~CTS_SAS_VALID_SPEED; 220 sas->bitrate = 150000; 221 222 ccb->ccb_h.status = CAM_REQ_CMP; 223 break; 224 } 225 case XPT_SET_TRAN_SETTINGS: 226 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 227 break; 228 case XPT_SCSI_IO: 229 { 230 struct ccb_hdr *ccbh = &ccb->ccb_h; 231 struct ccb_scsiio *csio = &ccb->csio; 232 233 ccbh->status = CAM_REQ_INPROG; 234 if (csio->cdb_len > MFI_SCSI_MAX_CDB_LEN) { 235 ccbh->status = CAM_REQ_INVALID; 236 break; 237 } 238 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) { 239 if (ccbh->flags & CAM_DATA_PHYS) { 240 ccbh->status = CAM_REQ_INVALID; 241 break; 242 } 243 if (ccbh->flags & CAM_SCATTER_VALID) { 244 ccbh->status = CAM_REQ_INVALID; 245 break; 246 } 247 } 248 249 ccbh->ccb_mfip_ptr = sc; 250 TAILQ_INSERT_TAIL(&mfisc->mfi_cam_ccbq, ccbh, sim_links.tqe); 251 mfi_startio(mfisc); 252 return; 253 } 254 default: 255 ccb->ccb_h.status = CAM_REQ_INVALID; 256 break; 257 } 258 259 xpt_done(ccb); 260 return; 261 } 262 263 static struct mfi_command * 264 mfip_start(void *data) 265 { 266 union ccb *ccb = data; 267 struct ccb_hdr *ccbh = &ccb->ccb_h; 268 struct ccb_scsiio *csio = &ccb->csio; 269 struct mfip_softc *sc; 270 struct mfi_pass_frame *pt; 271 struct mfi_command *cm; 272 273 sc = ccbh->ccb_mfip_ptr; 274 275 if ((cm = mfi_dequeue_free(sc->mfi_sc)) == NULL) 276 return (NULL); 277 278 pt = &cm->cm_frame->pass; 279 pt->header.cmd = MFI_CMD_PD_SCSI_IO; 280 pt->header.cmd_status = 0; 281 pt->header.scsi_status = 0; 282 pt->header.target_id = ccbh->target_id; 283 pt->header.lun_id = ccbh->target_lun; 284 pt->header.flags = 0; 285 pt->header.timeout = 0; 286 pt->header.data_len = csio->dxfer_len; 287 pt->header.sense_len = MFI_SENSE_LEN; 288 pt->header.cdb_len = csio->cdb_len; 289 pt->sense_addr_lo = cm->cm_sense_busaddr; 290 pt->sense_addr_hi = 0; 291 if (ccbh->flags & CAM_CDB_POINTER) 292 bcopy(csio->cdb_io.cdb_ptr, &pt->cdb[0], csio->cdb_len); 293 else 294 bcopy(csio->cdb_io.cdb_bytes, &pt->cdb[0], csio->cdb_len); 295 cm->cm_complete = mfip_done; 296 cm->cm_private = ccb; 297 cm->cm_sg = &pt->sgl; 298 cm->cm_total_frame_size = MFI_PASS_FRAME_SIZE; 299 cm->cm_data = csio->data_ptr; 300 cm->cm_len = csio->dxfer_len; 301 switch (ccbh->flags & CAM_DIR_MASK) { 302 case CAM_DIR_IN: 303 cm->cm_flags = MFI_CMD_DATAIN; 304 break; 305 case CAM_DIR_OUT: 306 cm->cm_flags = MFI_CMD_DATAOUT; 307 break; 308 case CAM_DIR_NONE: 309 default: 310 cm->cm_data = NULL; 311 cm->cm_len = 0; 312 cm->cm_flags = 0; 313 break; 314 } 315 316 TAILQ_REMOVE(&sc->mfi_sc->mfi_cam_ccbq, ccbh, sim_links.tqe); 317 return (cm); 318 } 319 320 static void 321 mfip_done(struct mfi_command *cm) 322 { 323 union ccb *ccb = cm->cm_private; 324 struct ccb_hdr *ccbh = &ccb->ccb_h; 325 struct ccb_scsiio *csio = &ccb->csio; 326 struct mfip_softc *sc; 327 struct mfi_pass_frame *pt; 328 329 sc = ccbh->ccb_mfip_ptr; 330 pt = &cm->cm_frame->pass; 331 332 switch (pt->header.cmd_status) { 333 case MFI_STAT_OK: 334 { 335 uint8_t command, device; 336 337 ccbh->status = CAM_REQ_CMP; 338 csio->scsi_status = pt->header.scsi_status; 339 if (ccbh->flags & CAM_CDB_POINTER) 340 command = csio->cdb_io.cdb_ptr[0]; 341 else 342 command = csio->cdb_io.cdb_bytes[0]; 343 if (command == INQUIRY) { 344 device = csio->data_ptr[0] & 0x1f; 345 if ((device == T_DIRECT) || (device == T_PROCESSOR)) 346 csio->data_ptr[0] = 347 (csio->data_ptr[0] & 0xe0) | T_NODEVICE; 348 } 349 break; 350 } 351 case MFI_STAT_SCSI_DONE_WITH_ERROR: 352 { 353 int sense_len; 354 355 ccbh->status = CAM_SCSI_STATUS_ERROR | CAM_AUTOSNS_VALID; 356 csio->scsi_status = pt->header.scsi_status; 357 if (pt->header.sense_len < csio->sense_len) 358 csio->sense_resid = csio->sense_len - 359 pt->header.sense_len; 360 else 361 csio->sense_resid = 0; 362 sense_len = min(pt->header.sense_len, 363 sizeof(struct scsi_sense_data)); 364 bzero(&csio->sense_data, sizeof(struct scsi_sense_data)); 365 bcopy(&cm->cm_sense->data[0], &csio->sense_data, sense_len); 366 break; 367 } 368 case MFI_STAT_DEVICE_NOT_FOUND: 369 ccbh->status = CAM_SEL_TIMEOUT; 370 break; 371 case MFI_STAT_SCSI_IO_FAILED: 372 ccbh->status = CAM_REQ_CMP_ERR; 373 csio->scsi_status = pt->header.scsi_status; 374 break; 375 default: 376 ccbh->status = CAM_REQ_CMP_ERR; 377 csio->scsi_status = pt->header.scsi_status; 378 break; 379 } 380 381 mfi_release_command(cm); 382 xpt_done(ccb); 383 } 384 385 static void 386 mfip_cam_poll(struct cam_sim *sim) 387 { 388 return; 389 } 390
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