amr_cam.c revision 105419
1/*- 2 * Copyright (c) 2000 Michael Smith 3 * Copyright (c) 2000 BSDi 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * 3. The party using or redistributing the source code and binary forms 28 * agrees to the above disclaimer and the terms and conditions set forth 29 * herein. 30 * 31 * Additional Copyright (c) 2002 by Eric Moore under same license. 32 * Additional Copyright (c) 2002 LSI Logic Corporation 33 * 34 * $FreeBSD: head/sys/dev/amr/amr_cam.c 105419 2002-10-18 21:29:14Z emoore $ 35 */ 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/malloc.h> 40#include <sys/kernel.h> 41 42#include <dev/amr/amr_compat.h> 43#include <sys/bus.h> 44#include <sys/conf.h> 45#include <sys/devicestat.h> 46#include <sys/disk.h> 47#include <sys/stat.h> 48 49#include <cam/cam.h> 50#include <cam/cam_ccb.h> 51#include <cam/cam_sim.h> 52#include <cam/cam_xpt.h> 53#include <cam/cam_xpt_sim.h> 54#include <cam/cam_debug.h> 55#include <cam/scsi/scsi_all.h> 56#include <cam/scsi/scsi_message.h> 57 58#include <machine/resource.h> 59#include <machine/bus.h> 60 61#include <dev/amr/amrreg.h> 62#include <dev/amr/amrvar.h> 63 64static void amr_cam_action(struct cam_sim *sim, union ccb *ccb); 65static void amr_cam_poll(struct cam_sim *sim); 66static void amr_cam_complete(struct amr_command *ac); 67 68 69/******************************************************************************** 70 * Enqueue/dequeue functions 71 */ 72static __inline void 73amr_enqueue_ccb(struct amr_softc *sc, union ccb *ccb) 74{ 75 int s; 76 77 s = splbio(); 78 TAILQ_INSERT_TAIL(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe); 79 splx(s); 80} 81 82static __inline void 83amr_requeue_ccb(struct amr_softc *sc, union ccb *ccb) 84{ 85 int s; 86 87 s = splbio(); 88 TAILQ_INSERT_HEAD(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe); 89 splx(s); 90} 91 92static __inline union ccb * 93amr_dequeue_ccb(struct amr_softc *sc) 94{ 95 union ccb *ccb; 96 int s; 97 98 s = splbio(); 99 if ((ccb = (union ccb *)TAILQ_FIRST(&sc->amr_cam_ccbq)) != NULL) 100 TAILQ_REMOVE(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe); 101 splx(s); 102 return(ccb); 103} 104 105/******************************************************************************** 106 * Attach our 'real' SCSI channels to CAM 107 */ 108int 109amr_cam_attach(struct amr_softc *sc) 110{ 111 struct cam_devq *devq; 112 int chn; 113 114 /* initialise the ccb queue */ 115 TAILQ_INIT(&sc->amr_cam_ccbq); 116 117 /* 118 * Allocate a devq for all our channels combined. This should 119 * allow for the maximum number of SCSI commands we will accept 120 * at one time. 121 */ 122 if ((devq = cam_simq_alloc(AMR_MAX_SCSI_CMDS)) == NULL) 123 return(ENOMEM); 124 125 /* 126 * Iterate over our channels, registering them with CAM 127 */ 128 for (chn = 0; chn < sc->amr_maxchan; chn++) { 129 130 /* allocate a sim */ 131 if ((sc->amr_cam_sim[chn] = cam_sim_alloc(amr_cam_action, 132 amr_cam_poll, 133 "amr", 134 sc, 135 device_get_unit(sc->amr_dev), 136 1, 137 AMR_MAX_SCSI_CMDS, 138 devq)) == NULL) { 139 cam_simq_free(devq); 140 device_printf(sc->amr_dev, "CAM SIM attach failed\n"); 141 return(ENOMEM); 142 } 143 144 /* register the bus ID so we can get it later */ 145 if (xpt_bus_register(sc->amr_cam_sim[chn], chn)) { 146 device_printf(sc->amr_dev, "CAM XPT bus registration failed\n"); 147 return(ENXIO); 148 } 149 } 150 /* 151 * XXX we should scan the config and work out which devices are actually 152 * protected. 153 */ 154 return(0); 155} 156 157/******************************************************************************** 158 * Disconnect ourselves from CAM 159 */ 160void 161amr_cam_detach(struct amr_softc *sc) 162{ 163 int chn, first; 164 165 for (chn = 0, first = 1; chn < sc->amr_maxchan; chn++) { 166 167 /* 168 * If a sim was allocated for this channel, free it 169 */ 170 if (sc->amr_cam_sim[chn] != NULL) { 171 xpt_bus_deregister(cam_sim_path(sc->amr_cam_sim[chn])); 172 cam_sim_free(sc->amr_cam_sim[chn], first ? TRUE : FALSE); 173 first = 0; 174 } 175 } 176} 177 178/******************************************************************************** 179 ******************************************************************************** 180 CAM passthrough interface 181 ******************************************************************************** 182 ********************************************************************************/ 183 184/******************************************************************************** 185 * Handle a request for action from CAM 186 */ 187static void 188amr_cam_action(struct cam_sim *sim, union ccb *ccb) 189{ 190 struct amr_softc *sc = cam_sim_softc(sim); 191 192 switch(ccb->ccb_h.func_code) { 193 194 /* 195 * Perform SCSI I/O to a physical device. 196 */ 197 case XPT_SCSI_IO: 198 { 199 struct ccb_hdr *ccbh = &ccb->ccb_h; 200 struct ccb_scsiio *csio = &ccb->csio; 201 202 /* Validate the CCB */ 203 ccbh->status = CAM_REQ_INPROG; 204 205 /* check the CDB length */ 206 if (csio->cdb_len > AMR_MAX_CDB_LEN) 207 ccbh->status = CAM_REQ_CMP_ERR; 208 209 /* check that the CDB pointer is not to a physical address */ 210 if ((ccbh->flags & CAM_CDB_POINTER) && (ccbh->flags & CAM_CDB_PHYS)) 211 ccbh->status = CAM_REQ_CMP_ERR; 212 213 /* if there is data transfer, it must be to/from a virtual address */ 214 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) { 215 if (ccbh->flags & CAM_DATA_PHYS) /* we can't map it */ 216 ccbh->status = CAM_REQ_CMP_ERR; 217 if (ccbh->flags & CAM_SCATTER_VALID) /* we want to do the s/g setup */ 218 ccbh->status = CAM_REQ_CMP_ERR; 219 } 220 221 /* 222 * If the command is to a LUN other than 0, fail it. 223 * This is probably incorrect, but during testing the firmware did not 224 * seem to respect the LUN field, and thus devices appear echoed. 225 */ 226 if (csio->ccb_h.target_lun != 0) 227 ccbh->status = CAM_REQ_CMP_ERR; 228 229 /* if we're happy with the request, queue it for attention */ 230 if (ccbh->status == CAM_REQ_INPROG) { 231 232 /* save the channel number in the ccb */ 233 csio->ccb_h.sim_priv.entries[0].field = cam_sim_bus(sim); 234 235 amr_enqueue_ccb(sc, ccb); 236 amr_startio(sc); 237 return; 238 } 239 break; 240 } 241 242 case XPT_CALC_GEOMETRY: 243 { 244 struct ccb_calc_geometry *ccg = &ccb->ccg; 245 u_int32_t size_in_mb; 246 u_int32_t secs_per_cylinder; 247 248 size_in_mb = ccg->volume_size / ((1024L * 1024L) / ccg->block_size); 249 250 if (size_in_mb > 1024) { 251 ccg->heads = 255; 252 ccg->secs_per_track = 63; 253 } else { 254 ccg->heads = 64; 255 ccg->secs_per_track = 32; 256 } 257 secs_per_cylinder = ccg->heads * ccg->secs_per_track; 258 ccg->cylinders = ccg->volume_size / secs_per_cylinder; 259 ccb->ccb_h.status = CAM_REQ_CMP; 260 break; 261 } 262 263 /* 264 * Return path stats. Some of these should probably be 265 * amended. 266 */ 267 case XPT_PATH_INQ: 268 { 269 struct ccb_pathinq *cpi = & ccb->cpi; 270 271 debug(3, "XPT_PATH_INQ"); 272 cpi->version_num = 1; /* XXX??? */ 273 cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16; 274 cpi->target_sprt = 0; 275 cpi->hba_misc = PIM_NOBUSRESET; 276 cpi->hba_eng_cnt = 0; 277 cpi->max_target = AMR_MAX_TARGETS; 278 cpi->max_lun = 0 /* AMR_MAX_LUNS*/; 279 cpi->initiator_id = 7; /* XXX variable? */ 280 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN); 281 strncpy(cpi->hba_vid, "LSI", HBA_IDLEN); 282 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN); 283 cpi->unit_number = cam_sim_unit(sim); 284 cpi->bus_id = cam_sim_bus(sim); 285 cpi->base_transfer_speed = 132 * 1024; /* XXX get from controller? */ 286 cpi->ccb_h.status = CAM_REQ_CMP; 287 288 break; 289 } 290 291 case XPT_RESET_BUS: 292 { 293 struct ccb_pathinq *cpi = & ccb->cpi; 294 295 debug(1, "XPT_RESET_BUS"); 296 cpi->ccb_h.status = CAM_REQ_CMP; 297 break; 298 } 299 300 case XPT_RESET_DEV: 301 { 302 debug(1, "XPT_RESET_DEV"); 303 ccb->ccb_h.status = CAM_REQ_CMP; 304 break; 305 } 306 307 case XPT_GET_TRAN_SETTINGS: 308 { 309 struct ccb_trans_settings *cts; 310 311 debug(3, "XPT_GET_TRAN_SETTINGS"); 312 313 cts = &(ccb->cts); 314 315 if ((cts->flags & CCB_TRANS_USER_SETTINGS) == 0) { 316 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 317 break; 318 } 319 320 cts->flags = CCB_TRANS_DISC_ENB|CCB_TRANS_TAG_ENB; 321 cts->bus_width = MSG_EXT_WDTR_BUS_32_BIT; 322 cts->sync_period = 6; /* 40MHz how wide is this bus? */ 323 cts->sync_offset = 31; /* How to extract this from board? */ 324 325 cts->valid = CCB_TRANS_SYNC_RATE_VALID 326 | CCB_TRANS_SYNC_OFFSET_VALID 327 | CCB_TRANS_BUS_WIDTH_VALID 328 | CCB_TRANS_DISC_VALID 329 | CCB_TRANS_TQ_VALID; 330 ccb->ccb_h.status = CAM_REQ_CMP; 331 break; 332 } 333 334 case XPT_SET_TRAN_SETTINGS: 335 debug(3, "XPT_SET_TRAN_SETTINGS"); 336 ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; 337 break; 338 339 340 /* 341 * Reject anything else as unsupported. 342 */ 343 default: 344 /* we can't do this */ 345 ccb->ccb_h.status = CAM_REQ_INVALID; 346 break; 347 } 348 xpt_done(ccb); 349} 350 351/******************************************************************************** 352 * Convert a CAM CCB off the top of the CCB queue to a passthrough SCSI command. 353 */ 354int 355amr_cam_command(struct amr_softc *sc, struct amr_command **acp) 356{ 357 struct amr_command *ac; 358 struct amr_passthrough *ap; 359 struct ccb_scsiio *csio; 360 int bus, target, error; 361 362 error = 0; 363 ac = NULL; 364 ap = NULL; 365 366 /* check to see if there is a ccb for us to work with */ 367 if ((csio = (struct ccb_scsiio *)amr_dequeue_ccb(sc)) == NULL) 368 goto out; 369 370 /* get bus/target, XXX validate against protected devices? */ 371 bus = csio->ccb_h.sim_priv.entries[0].field; 372 target = csio->ccb_h.target_id; 373 374 /* 375 * Build a passthrough command. 376 */ 377 378 /* construct passthrough */ 379 if ((ap = malloc(sizeof(*ap), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) { 380 error = ENOMEM; 381 goto out; 382 } 383 ap->ap_timeout = 0; 384 ap->ap_ars = 1; 385 ap->ap_request_sense_length = 14; 386 ap->ap_islogical = 0; 387 ap->ap_channel = bus; 388 ap->ap_scsi_id = target; 389 ap->ap_logical_drive_no = csio->ccb_h.target_lun; 390 ap->ap_cdb_length = csio->cdb_len; 391 ap->ap_data_transfer_length = csio->dxfer_len; 392 if (csio->ccb_h.flags & CAM_CDB_POINTER) { 393 bcopy(csio->cdb_io.cdb_ptr, ap->ap_cdb, csio->cdb_len); 394 } else { 395 bcopy(csio->cdb_io.cdb_bytes, ap->ap_cdb, csio->cdb_len); 396 } 397 /* we leave the data s/g list and s/g count to the map routine later */ 398 399 debug(2, " COMMAND %x/%d+%d to %d:%d:%d", ap->ap_cdb[0], ap->ap_cdb_length, csio->dxfer_len, 400 ap->ap_channel, ap->ap_scsi_id, ap->ap_logical_drive_no); 401 402 /* construct command */ 403 if ((ac = amr_alloccmd(sc)) == NULL) { 404 error = ENOMEM; 405 goto out; 406 } 407 408 ac->ac_data = ap; 409 ac->ac_length = sizeof(*ap); 410 ac->ac_flags |= AMR_CMD_DATAOUT; 411 412 ac->ac_ccb_data = csio->data_ptr; 413 ac->ac_ccb_length = csio->dxfer_len; 414 if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) 415 ac->ac_flags |= AMR_CMD_CCB_DATAIN; 416 if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT) 417 ac->ac_flags |= AMR_CMD_CCB_DATAOUT; 418 419 ac->ac_complete = amr_cam_complete; 420 ac->ac_private = csio; 421 ac->ac_mailbox.mb_command = AMR_CMD_PASS; 422 423out: 424 if (error != 0) { 425 if (ac != NULL) 426 amr_releasecmd(ac); 427 if (ap != NULL) 428 free(ap, M_DEVBUF); 429 if (csio != NULL) /* put it back and try again later */ 430 amr_requeue_ccb(sc, (union ccb *)csio); 431 } 432 *acp = ac; 433 return(error); 434} 435 436/******************************************************************************** 437 * Check for interrupt status 438 */ 439static void 440amr_cam_poll(struct cam_sim *sim) 441{ 442 amr_done(cam_sim_softc(sim)); 443} 444 445/******************************************************************************** 446 * Handle completion of a command submitted via CAM. 447 */ 448static void 449amr_cam_complete(struct amr_command *ac) 450{ 451 struct amr_passthrough *ap = (struct amr_passthrough *)ac->ac_data; 452 struct ccb_scsiio *csio = (struct ccb_scsiio *)ac->ac_private; 453 struct scsi_inquiry_data *inq = (struct scsi_inquiry_data *)csio->data_ptr; 454 455 /* XXX note that we're ignoring ac->ac_status - good idea? */ 456 457 debug(1, "status 0x%x scsi_status 0x%x", ac->ac_status, ap->ap_scsi_status); 458 459 /* 460 * Hide disks from CAM so that they're not picked up and treated as 'normal' disks. 461 * 462 * If the configuration provides a mechanism to mark a disk a "not managed", we 463 * could add handling for that to allow disks to be selectively visible. 464 */ 465 466 if ((ap->ap_cdb[0] == INQUIRY) && (SID_TYPE(inq) == T_DIRECT)) { 467 bzero(csio->data_ptr, csio->dxfer_len); 468 if (ap->ap_scsi_status == 0xf0) { 469 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR; 470 } else { 471 csio->ccb_h.status = CAM_DEV_NOT_THERE; 472 } 473 } else { 474 475 /* handle passthrough SCSI status */ 476 switch(ap->ap_scsi_status) { 477 case 0: /* completed OK */ 478 csio->ccb_h.status = CAM_REQ_CMP; 479 break; 480 481 case 0x02: 482 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR; 483 csio->scsi_status = SCSI_STATUS_CHECK_COND; 484 bcopy(ap->ap_request_sense_area, &csio->sense_data, AMR_MAX_REQ_SENSE_LEN); 485 csio->sense_len = AMR_MAX_REQ_SENSE_LEN; 486 csio->ccb_h.status |= CAM_AUTOSNS_VALID; 487 break; 488 489 case 0x08: 490 csio->ccb_h.status = CAM_SCSI_BUSY; 491 break; 492 493 case 0xf0: 494 case 0xf4: 495 default: 496 csio->ccb_h.status = CAM_REQ_CMP_ERR; 497 break; 498 } 499 } 500 free(ap, M_DEVBUF); 501 if ((csio->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) 502 debug(2, "%*D\n", imin(csio->dxfer_len, 16), csio->data_ptr, " "); 503 xpt_done((union ccb *)csio); 504 amr_releasecmd(ac); 505} 506 507