/*- * Copyright (c) 2001-2003 Thomas Quinot * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer, * without modification, immediately at the beginning of the file. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $FreeBSD: src/sys/dev/ata/atapi-cam.c,v 1.44 2006/03/31 08:09:05 sos Exp $ * $DragonFly: src/sys/dev/disk/nata/atapi-cam.c,v 1.12 2008/11/19 08:12:16 hasso Exp $ */ #include "opt_ata.h" #include "opt_scsi.h" #include #include #include #include /* for {get,rel}_mplock() */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ata-all.h" #include "ata_if.h" /* private data associated with an ATA bus */ struct atapi_xpt_softc { struct ata_device atapi_cam_dev; /* must be first */ device_t dev; device_t parent; struct ata_channel *ata_ch; struct cam_path *path; struct cam_sim *sim; int flags; #define BUS_REGISTERED 0x01 #define RESOURCE_SHORTAGE 0x02 #define DETACHING 0x04 TAILQ_HEAD(,atapi_hcb) pending_hcbs; struct ata_device *atadev[2]; struct spinlock state_lock; }; /* hardware command descriptor block */ struct atapi_hcb { struct atapi_xpt_softc *softc; int unit; int bus; int target; int lun; union ccb *ccb; int flags; #define QUEUED 0x0001 #define AUTOSENSE 0x0002 char *dxfer_alloc; TAILQ_ENTRY(atapi_hcb) chain; }; enum reinit_reason { ATTACH, RESET }; /* Device methods */ static void atapi_cam_identify(device_t *dev, device_t parent); static int atapi_cam_probe(device_t dev); static int atapi_cam_attach(device_t dev); static int atapi_cam_detach(device_t dev); static int atapi_cam_reinit(device_t dev); /* CAM XPT methods */ static void atapi_action(struct cam_sim *, union ccb *); static void atapi_poll(struct cam_sim *); static void atapi_async(void *, u_int32_t, struct cam_path *, void *); static void atapi_cb(struct ata_request *); /* Module methods */ static int atapi_cam_event_handler(module_t mod, int what, void *arg); /* internal functions */ static void reinit_bus(struct atapi_xpt_softc *scp, enum reinit_reason reason); static void setup_async_cb(struct atapi_xpt_softc *, uint32_t); static void cam_rescan_callback(struct cam_periph *, union ccb *); static void cam_rescan(struct cam_sim *); static void free_hcb_and_ccb_done(struct atapi_hcb *, u_int32_t); static struct atapi_hcb *allocate_hcb(struct atapi_xpt_softc *, int, int, union ccb *); static void free_hcb(struct atapi_hcb *hcb); static void free_softc(struct atapi_xpt_softc *scp); static MALLOC_DEFINE(M_ATACAM, "ata_cam", "ATA driver CAM-XPT layer"); static device_method_t atapi_cam_methods[] = { DEVMETHOD(device_identify, atapi_cam_identify), DEVMETHOD(device_probe, atapi_cam_probe), DEVMETHOD(device_attach, atapi_cam_attach), DEVMETHOD(device_detach, atapi_cam_detach), DEVMETHOD(ata_reinit, atapi_cam_reinit), {0, 0} }; static driver_t atapi_cam_driver = { "atapicam", atapi_cam_methods, sizeof(struct atapi_xpt_softc) }; static devclass_t atapi_cam_devclass; DRIVER_MODULE(atapicam, ata, atapi_cam_driver, atapi_cam_devclass, atapi_cam_event_handler, /*arg*/NULL); MODULE_VERSION(atapicam, 1); MODULE_DEPEND(atapicam, ata, 1, 1, 1); MODULE_DEPEND(atapicam, cam, 1, 1, 1); static void atapi_cam_identify(device_t *dev, device_t parent) { struct atapi_xpt_softc *scp = kmalloc(sizeof(struct atapi_xpt_softc), M_ATACAM, M_INTWAIT|M_ZERO); device_t child; /* Assume one atapicam instance per parent channel instance. */ child = device_add_child(parent, "atapicam", -1); if (child == NULL) { /* XXX TGEN Use device_printf()? */ kprintf("atapi_cam_identify: out of memory, can't add child"); kfree(scp, M_ATACAM); return; } scp->atapi_cam_dev.unit = -1; scp->atapi_cam_dev.dev = child; device_quiet(child); device_set_softc(child, scp); } static int atapi_cam_probe(device_t dev) { struct ata_device *atadev = device_get_softc (dev); KASSERT(atadev != NULL, ("expect valid struct ata_device")); if (atadev->unit < 0) { device_set_desc(dev, "ATAPI CAM Attachment"); return(0); } else { return ENXIO; } } static int atapi_cam_attach(device_t dev) { struct atapi_xpt_softc *scp = NULL; struct cam_devq *devq = NULL; struct cam_sim *sim = NULL; struct cam_path *path = NULL; int unit, error; scp = (struct atapi_xpt_softc *)device_get_softc(dev); if (scp == NULL) { device_printf(dev, "Cannot get softc\n"); return ENOMEM; } spin_init(&scp->state_lock); scp->dev = dev; scp->parent = device_get_parent(dev); scp->ata_ch = device_get_softc(scp->parent); TAILQ_INIT(&scp->pending_hcbs); unit = device_get_unit(dev); if ((devq = cam_simq_alloc(16)) == NULL) { error = ENOMEM; goto out; } if ((sim = cam_sim_alloc(atapi_action, atapi_poll, "ata", (void *)scp, unit, &sim_mplock, 1, 1, devq)) == NULL) { error = ENOMEM; goto out; } scp->sim = sim; if (xpt_bus_register(sim, 0) != CAM_SUCCESS) { error = EINVAL; goto out; } scp->flags |= BUS_REGISTERED; if (xpt_create_path(&path, /*periph*/ NULL, cam_sim_path(sim), CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { error = ENOMEM; goto out; } scp->path = path; CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Registered SIM for ata%d\n", unit)); setup_async_cb(scp, AC_LOST_DEVICE); reinit_bus(scp, ATTACH); error = 0; out: if (error != 0) free_softc(scp); return(error); } static int atapi_cam_detach(device_t dev) { struct atapi_xpt_softc *scp = device_get_softc(dev); get_mplock(); xpt_freeze_simq(scp->sim, 1 /*count*/); rel_mplock(); spin_lock_wr(&scp->state_lock); scp->flags |= DETACHING; spin_unlock_wr(&scp->state_lock); free_softc(scp); return (0); } static int atapi_cam_reinit(device_t dev) { struct atapi_xpt_softc *scp = device_get_softc(dev); /* * scp might be null if the bus is being reinitialised during * the boot-up sequence, before the ATAPI bus is registered. */ if (scp != NULL) { reinit_bus(scp, RESET); } return 0; } static void reinit_bus(struct atapi_xpt_softc *scp, enum reinit_reason reason) { struct ata_device *old_atadev[2], *atadev; device_t *children; int nchildren, i, dev_changed; if (device_get_children(scp->parent, &children, &nchildren) != 0) { return; } spin_lock_wr(&scp->state_lock); old_atadev[0] = scp->atadev[0]; old_atadev[1] = scp->atadev[1]; scp->atadev[0] = NULL; scp->atadev[1] = NULL; for (i = 0; i < nchildren; i++) { /* XXX Does the child need to actually be attached yet? */ if (children[i] != NULL) { atadev = device_get_softc(children[i]); if ((atadev->unit == ATA_MASTER) && (scp->ata_ch->devices & ATA_ATAPI_MASTER) != 0) scp->atadev[0] = atadev; if ((atadev->unit == ATA_SLAVE) && (scp->ata_ch->devices & ATA_ATAPI_SLAVE) != 0) scp->atadev[1] = atadev; } } dev_changed = (old_atadev[0] != scp->atadev[0]) || (old_atadev[1] != scp->atadev[1]); spin_unlock_wr(&scp->state_lock); kfree(children, M_TEMP); switch (reason) { case RESET: xpt_async(AC_BUS_RESET, scp->path, NULL); if (!dev_changed) break; /*FALLTHROUGH*/ case ATTACH: cam_rescan(scp->sim); break; } } static void setup_async_cb(struct atapi_xpt_softc *scp, uint32_t events) { struct ccb_setasync csa; get_mplock(); xpt_setup_ccb(&csa.ccb_h, scp->path, /*priority*/ 5); csa.ccb_h.func_code = XPT_SASYNC_CB; csa.event_enable = events; csa.callback = &atapi_async; csa.callback_arg = scp->sim; xpt_action((union ccb *) &csa); rel_mplock(); } static void atapi_action(struct cam_sim *sim, union ccb *ccb) { struct atapi_xpt_softc *softc = (struct atapi_xpt_softc*)cam_sim_softc(sim); struct ccb_hdr *ccb_h = &ccb->ccb_h; struct atapi_hcb *hcb = NULL; struct ata_request *request = NULL; int unit = cam_sim_unit(sim); int bus = cam_sim_bus(sim); int len; char *buf; switch (ccb_h->func_code) { case XPT_PATH_INQ: { struct ccb_pathinq *cpi = &ccb->cpi; int tid = ccb_h->target_id; cpi->version_num = 1; cpi->hba_inquiry = 0; cpi->target_sprt = 0; cpi->hba_misc = PIM_NO_6_BYTE; cpi->hba_eng_cnt = 0; bzero(cpi->vuhba_flags, sizeof(cpi->vuhba_flags)); cpi->max_target = 1; cpi->max_lun = 0; cpi->async_flags = 0; cpi->hpath_id = 0; cpi->initiator_id = 7; strncpy(cpi->sim_vid, "FreeBSD", sizeof(cpi->sim_vid)); strncpy(cpi->hba_vid, "ATAPI", sizeof(cpi->hba_vid)); strncpy(cpi->dev_name, cam_sim_name(sim), sizeof cpi->dev_name); cpi->unit_number = cam_sim_unit(sim); cpi->bus_id = cam_sim_bus(sim); cpi->base_transfer_speed = 3300; cpi->transport = XPORT_ATA; cpi->transport_version = 2; cpi->protocol = PROTO_SCSI; cpi->protocol_version = SCSI_REV_2; if (softc->ata_ch && tid != CAM_TARGET_WILDCARD) { spin_lock_wr(&softc->state_lock); if (softc->atadev[tid] == NULL) { ccb->ccb_h.status = CAM_DEV_NOT_THERE; xpt_done(ccb); spin_unlock_wr(&softc->state_lock); return; } switch (softc->atadev[ccb_h->target_id]->mode) { case ATA_PIO1: cpi->base_transfer_speed = 5200; break; case ATA_PIO2: cpi->base_transfer_speed = 7000; break; case ATA_PIO3: cpi->base_transfer_speed = 11000; break; case ATA_PIO4: case ATA_DMA: case ATA_WDMA2: cpi->base_transfer_speed = 16000; break; case ATA_UDMA2: cpi->base_transfer_speed = 33000; break; case ATA_UDMA4: cpi->base_transfer_speed = 66000; break; case ATA_UDMA5: cpi->base_transfer_speed = 100000; break; case ATA_UDMA6: cpi->base_transfer_speed = 133000; break; default: break; } spin_unlock_wr(&softc->state_lock); } ccb->ccb_h.status = CAM_REQ_CMP; xpt_done(ccb); return; } case XPT_RESET_DEV: { int tid = ccb_h->target_id; CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("dev reset\n")); ata_controlcmd(softc->atadev[tid]->dev, ATA_DEVICE_RESET, 0, 0, 0); ccb->ccb_h.status = CAM_REQ_CMP; xpt_done(ccb); return; } case XPT_RESET_BUS: CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("bus reset\n")); ata_reinit(softc->parent); ccb->ccb_h.status = CAM_REQ_CMP; xpt_done(ccb); return; case XPT_SET_TRAN_SETTINGS: /* ignore these, we're not doing SCSI here */ CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("SET_TRAN_SETTINGS not supported\n")); ccb->ccb_h.status = CAM_FUNC_NOTAVAIL; xpt_done(ccb); return; case XPT_GET_TRAN_SETTINGS: { struct ccb_trans_settings *cts = &ccb->cts; cts->protocol = PROTO_SCSI; cts->protocol_version = SCSI_REV_2; cts->transport = XPORT_ATA; cts->transport_version = XPORT_VERSION_UNSPECIFIED; cts->proto_specific.valid = 0; cts->xport_specific.valid = 0; /* nothing more to do */ ccb->ccb_h.status = CAM_REQ_CMP; CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("GET_TRAN_SETTINGS\n")); xpt_done(ccb); return; } case XPT_CALC_GEOMETRY: { CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_SUBTRACE, ("CALC_GEOMETRY\n")); cam_calc_geometry(&ccb->ccg, /*extended*/1); xpt_done(ccb); return; } case XPT_SCSI_IO: { struct ccb_scsiio *csio = &ccb->csio; int tid = ccb_h->target_id, lid = ccb_h->target_lun; int request_flags = ATA_R_QUIET | ATA_R_ATAPI; CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, ("XPT_SCSI_IO\n")); spin_lock_wr(&softc->state_lock); if (softc->flags & DETACHING) { ccb->ccb_h.status = CAM_REQ_ABORTED; xpt_done(ccb); spin_unlock_wr(&softc->state_lock); return; } if (softc->atadev[tid] == NULL) { ccb->ccb_h.status = CAM_DEV_NOT_THERE; xpt_done(ccb); spin_unlock_wr(&softc->state_lock); return; } /* check that this request was not aborted already */ if ((ccb_h->status & CAM_STATUS_MASK) != CAM_REQ_INPROG) { kprintf("XPT_SCSI_IO received but already in progress?\n"); xpt_done(ccb); spin_unlock_wr(&softc->state_lock); return; } if (lid > 0) { CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, ("SCSI IO received for invalid lun %d\n", lid)); goto action_invalid; } if (csio->cdb_len > sizeof request->u.atapi.ccb) { CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, ("CAM CCB too long for ATAPI")); goto action_invalid; } if ((ccb_h->flags & CAM_SCATTER_VALID)) { /* scatter-gather not supported */ xpt_print_path(ccb_h->path); kprintf("ATAPI/CAM does not support scatter-gather yet!\n"); goto action_invalid; } switch (ccb_h->flags & CAM_DIR_MASK) { case CAM_DIR_IN: request_flags |= ATA_R_READ; break; case CAM_DIR_OUT: request_flags |= ATA_R_WRITE; break; case CAM_DIR_NONE: /* No flags need to be set */ break; default: device_printf(softc->dev, "unknown IO operation\n"); goto action_invalid; } if ((hcb = allocate_hcb(softc, unit, bus, ccb)) == NULL) { kprintf("cannot allocate ATAPI/CAM hcb\n"); goto action_oom; } if ((request = ata_alloc_request()) == NULL) { kprintf("cannot allocate ATAPI/CAM request\n"); goto action_oom; } bcopy((ccb_h->flags & CAM_CDB_POINTER) ? csio->cdb_io.cdb_ptr : csio->cdb_io.cdb_bytes, request->u.atapi.ccb, csio->cdb_len); #ifdef CAMDEBUG if (CAM_DEBUGGED(ccb_h->path, CAM_DEBUG_CDB)) { char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1]; kprintf("atapi_action: hcb@%p: %s\n", hcb, scsi_cdb_string(request->u.atapi.ccb, cdb_str, sizeof(cdb_str))); } if (CAM_DEBUGGED(ccb_h->path, CAM_DEBUG_SUBTRACE)) { request_flags |= ATA_R_DEBUG; } #endif len = csio->dxfer_len; buf = csio->data_ptr; /* some SCSI commands require special processing */ switch (request->u.atapi.ccb[0]) { case INQUIRY: { /* * many ATAPI devices seem to report more than * SHORT_INQUIRY_LENGTH bytes of available INQUIRY * information, but respond with some incorrect condition * when actually asked for it, so we are going to pretend * that only SHORT_INQUIRY_LENGTH are expected, anyway. */ struct scsi_inquiry *inq = (struct scsi_inquiry *) &request->u.atapi.ccb[0]; if (inq->byte2 == 0 && inq->page_code == 0 && inq->length > SHORT_INQUIRY_LENGTH) { bzero(buf, len); len = inq->length = SHORT_INQUIRY_LENGTH; } break; } case READ_6: /* FALLTHROUGH */ case WRITE_6: CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, ("Translating %s into _10 equivalent\n", (request->u.atapi.ccb[0] == READ_6) ? "READ_6" : "WRITE_6")); request->u.atapi.ccb[0] |= 0x20; request->u.atapi.ccb[9] = request->u.atapi.ccb[5]; request->u.atapi.ccb[8] = request->u.atapi.ccb[4]; request->u.atapi.ccb[7] = 0; request->u.atapi.ccb[6] = 0; request->u.atapi.ccb[5] = request->u.atapi.ccb[3]; request->u.atapi.ccb[4] = request->u.atapi.ccb[2]; request->u.atapi.ccb[3] = request->u.atapi.ccb[1] & 0x1f; request->u.atapi.ccb[2] = 0; request->u.atapi.ccb[1] = 0; break; } if ((ccb_h->flags & CAM_DIR_MASK) == CAM_DIR_IN && (len & 1)) { /* ATA always transfers an even number of bytes */ buf = hcb->dxfer_alloc = kmalloc(++len, M_ATACAM, M_INTWAIT | M_ZERO); } /* * Don't allow DMA for requests with length not multiple of 16 bytes. * Some ATAPI devices don't like it. */ if ((softc->atadev[tid]->mode >= ATA_DMA) && len > 0 && !(len & 15)) request_flags |= ATA_R_DMA; request->dev = softc->atadev[tid]->dev; request->driver = hcb; request->data = buf; request->bytecount = len; request->transfersize = min(request->bytecount, min(softc->ata_ch->dma->max_iosize, 65534)); request->timeout = ccb_h->timeout / 1000; /* XXX lost granularity */ request->callback = &atapi_cb; request->flags = request_flags; /* * no retries are to be performed at the ATA level; any retries * will be done by CAM . */ request->retries = 0; TAILQ_INSERT_TAIL(&softc->pending_hcbs, hcb, chain); hcb->flags |= QUEUED; ccb_h->status |= CAM_SIM_QUEUED; spin_unlock_wr(&softc->state_lock); ata_queue_request(request); return; } default: CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, ("unsupported function code 0x%02x\n", ccb_h->func_code)); goto action_invalid; } /* NOTREACHED */ action_oom: if (request != NULL) ata_free_request(request); if (hcb != NULL) free_hcb(hcb); spin_unlock_wr(&softc->state_lock); get_mplock(); xpt_print_path(ccb_h->path); kprintf("out of memory, freezing queue.\n"); softc->flags |= RESOURCE_SHORTAGE; xpt_freeze_simq(sim, /*count*/ 1); rel_mplock(); ccb_h->status = CAM_REQUEUE_REQ; xpt_done(ccb); return; action_invalid: spin_unlock_wr(&softc->state_lock); ccb_h->status = CAM_REQ_INVALID; xpt_done(ccb); return; } static void atapi_poll(struct cam_sim *sim) { /* do nothing - we do not actually service any interrupts */ kprintf("atapi_poll called!\n"); } static void atapi_cb(struct ata_request *request) { struct atapi_xpt_softc *scp; struct atapi_hcb *hcb; struct ccb_scsiio *csio; u_int32_t rc; hcb = (struct atapi_hcb *)request->driver; scp = hcb->softc; csio = &hcb->ccb->csio; #ifdef CAMDEBUG # define err (request->u.atapi.sense.key) if (CAM_DEBUGGED(csio->ccb_h.path, CAM_DEBUG_CDB)) { kprintf("atapi_cb: hcb@%p sense = %02x: sk = %01x%s%s%s\n", hcb, err, err & 0x0f, (err & 0x80) ? ", Filemark" : "", (err & 0x40) ? ", EOM" : "", (err & 0x20) ? ", ILI" : ""); device_printf(request->dev, "cmd %s status %02x result %02x error %02x\n", ata_cmd2str(request), request->status, request->result, request->error); } #endif if ((hcb->flags & AUTOSENSE) != 0) { rc = CAM_SCSI_STATUS_ERROR; if (request->result == 0) { csio->ccb_h.status |= CAM_AUTOSNS_VALID; } } else if (request->result != 0) { if ((request->flags & ATA_R_TIMEOUT) != 0) { rc = CAM_CMD_TIMEOUT; } else { rc = CAM_SCSI_STATUS_ERROR; csio->scsi_status = SCSI_STATUS_CHECK_COND; if ((csio->ccb_h.flags & CAM_DIS_AUTOSENSE) == 0) { #if 0 static const int8_t ccb[16] = { ATAPI_REQUEST_SENSE, 0, 0, 0, sizeof(struct atapi_sense), 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; bcopy (ccb, request->u.atapi.ccb, sizeof ccb); request->data = (caddr_t)&csio->sense_data; request->bytecount = sizeof(struct atapi_sense); request->transfersize = min(request->bytecount, 65534); request->timeout = csio->ccb_h.timeout / 1000; request->retries = 2; request->flags = ATA_R_QUIET|ATA_R_ATAPI|ATA_R_IMMEDIATE; hcb->flags |= AUTOSENSE; ata_queue_request(request); return; #else /* * Use auto-sense data from the ATA layer, if it has * issued a REQUEST SENSE automatically and that operation * returned without error. */ if (request->u.atapi.sense.key != 0 && request->error == 0) { bcopy (&request->u.atapi.sense, &csio->sense_data, sizeof(struct atapi_sense)); csio->ccb_h.status |= CAM_AUTOSNS_VALID; } } #endif } } else { rc = CAM_REQ_CMP; csio->scsi_status = SCSI_STATUS_OK; if (((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN) && hcb->dxfer_alloc != NULL) { bcopy(hcb->dxfer_alloc, csio->data_ptr, csio->dxfer_len); } } spin_lock_wr(&scp->state_lock); free_hcb_and_ccb_done(hcb, rc); spin_unlock_wr(&scp->state_lock); ata_free_request(request); } static void free_hcb_and_ccb_done(struct atapi_hcb *hcb, u_int32_t status) { struct atapi_xpt_softc *softc; union ccb *ccb; if (hcb == NULL) return; softc = hcb->softc; ccb = hcb->ccb; /* we're about to free a hcb, so the shortage has ended */ if (softc->flags & RESOURCE_SHORTAGE) { softc->flags &= ~RESOURCE_SHORTAGE; status |= CAM_RELEASE_SIMQ; } free_hcb(hcb); ccb->ccb_h.status = status | (ccb->ccb_h.status & ~(CAM_STATUS_MASK | CAM_SIM_QUEUED)); xpt_done(ccb); } static void atapi_async(void *callback_arg, u_int32_t code, struct cam_path* path, void *arg) { struct atapi_xpt_softc *softc; struct cam_sim *sim; int targ; crit_enter(); sim = (struct cam_sim *) callback_arg; softc = (struct atapi_xpt_softc *) cam_sim_softc(sim); switch (code) { case AC_LOST_DEVICE: targ = xpt_path_target_id(path); xpt_print_path(path); if (targ == -1) kprintf("Lost host adapter\n"); else kprintf("Lost target %d???\n", targ); break; default: break; } crit_exit(); } static void cam_rescan_callback(struct cam_periph *periph, union ccb *ccb) { if (ccb->ccb_h.status != CAM_REQ_CMP) { CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("Rescan failed, 0x%04x\n", ccb->ccb_h.status)); } else { CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("Rescan succeeded\n")); } xpt_free_path(ccb->ccb_h.path); kfree(ccb, M_ATACAM); } static void cam_rescan(struct cam_sim *sim) { struct cam_path *path; union ccb *ccb = kmalloc(sizeof(union ccb), M_ATACAM, M_WAITOK | M_ZERO); get_mplock(); if (xpt_create_path(&path, xpt_periph, cam_sim_path(sim), CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { rel_mplock(); kfree(ccb, M_ATACAM); return; } CAM_DEBUG(path, CAM_DEBUG_TRACE, ("Rescanning ATAPI bus.\n")); xpt_setup_ccb(&ccb->ccb_h, path, 5/*priority (low)*/); ccb->ccb_h.func_code = XPT_SCAN_BUS; ccb->ccb_h.cbfcnp = cam_rescan_callback; ccb->crcn.flags = CAM_FLAG_NONE; xpt_action(ccb); /* scan is in progress now */ rel_mplock(); } static struct atapi_hcb * allocate_hcb(struct atapi_xpt_softc *softc, int unit, int bus, union ccb *ccb) { struct atapi_hcb *hcb = (struct atapi_hcb *) kmalloc(sizeof(struct atapi_hcb), M_ATACAM, M_INTWAIT | M_ZERO); hcb->softc = softc; hcb->unit = unit; hcb->bus = bus; hcb->ccb = ccb; return hcb; } static void free_hcb(struct atapi_hcb *hcb) { if ((hcb->flags & QUEUED) != 0) TAILQ_REMOVE(&hcb->softc->pending_hcbs, hcb, chain); if (hcb->dxfer_alloc != NULL) kfree(hcb->dxfer_alloc, M_ATACAM); kfree(hcb, M_ATACAM); } static void free_softc(struct atapi_xpt_softc *scp) { struct atapi_hcb *hcb; if (scp != NULL) { spin_lock_wr(&scp->state_lock); TAILQ_FOREACH(hcb, &scp->pending_hcbs, chain) { free_hcb_and_ccb_done(hcb, CAM_UNREC_HBA_ERROR); } spin_unlock_wr(&scp->state_lock); get_mplock(); if (scp->path != NULL) { setup_async_cb(scp, 0); xpt_free_path(scp->path); } if ((scp->flags & BUS_REGISTERED) != 0) { if (xpt_bus_deregister(cam_sim_path(scp->sim)) == CAM_REQ_CMP) scp->flags &= ~BUS_REGISTERED; } if (scp->sim != NULL) { if ((scp->flags & BUS_REGISTERED) == 0) cam_sim_free(scp->sim); else kprintf("Can't free %s SIM (still registered)\n", cam_sim_name(scp->sim)); } rel_mplock(); spin_uninit(&scp->state_lock); } } static int atapi_cam_event_handler(module_t mod, int what, void *arg) { device_t *devlist; int devcount; switch (what) { case MOD_UNLOAD: if (devclass_get_devices(atapi_cam_devclass, &devlist, &devcount) != 0) return ENXIO; if (devlist != NULL) { while (devlist != NULL && devcount > 0) { device_t child = devlist[--devcount]; struct atapi_xpt_softc *scp = device_get_softc(child); device_delete_child(device_get_parent(child),child); if (scp != NULL) kfree(scp, M_ATACAM); } kfree(devlist, M_TEMP); } break; default: break; } return 0; }