diff options
Diffstat (limited to 'sys/dev/ata/atapi-cam.c')
| -rw-r--r-- | sys/dev/ata/atapi-cam.c | 924 |
1 files changed, 924 insertions, 0 deletions
diff --git a/sys/dev/ata/atapi-cam.c b/sys/dev/ata/atapi-cam.c new file mode 100644 index 0000000..bce8625 --- /dev/null +++ b/sys/dev/ata/atapi-cam.c @@ -0,0 +1,924 @@ +/*- + * Copyright (c) 2001-2007 Thomas Quinot <thomas@cuivre.fr.eu.org> + * 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/malloc.h> +#include <sys/ata.h> +#include <sys/taskqueue.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/sema.h> +#include <vm/uma.h> +#include <machine/resource.h> +#include <machine/bus.h> + +#include <cam/cam.h> +#include <cam/cam_ccb.h> +#include <cam/cam_periph.h> +#include <cam/cam_sim.h> +#include <cam/cam_xpt_sim.h> +#include <cam/cam_debug.h> +#include <cam/scsi/scsi_all.h> + +#include <dev/ata/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 mtx 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 { BOOT_ATTACH, ATTACH, RESET }; + +/* Device methods */ +static void atapi_cam_identify(driver_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(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(driver_t *driver, device_t parent) +{ + struct atapi_xpt_softc *scp = + malloc (sizeof (struct atapi_xpt_softc), M_ATACAM, M_NOWAIT|M_ZERO); + device_t child; + + if (scp == NULL) { + printf ("atapi_cam_identify: out of memory"); + return; + } + + /* Assume one atapicam instance per parent channel instance. */ + child = device_add_child(parent, "atapicam", -1); + if (child == NULL) { + printf ("atapi_cam_identify: out of memory, can't add child"); + free (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); + } + + mtx_init(&scp->state_lock, "ATAPICAM lock", NULL, MTX_DEF); + + 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(device_get_parent(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, &scp->state_lock, 1, 1, devq)) == NULL) { + error = ENOMEM; + goto out; + } + scp->sim = sim; + + mtx_lock(&scp->state_lock); + if (xpt_bus_register(sim, dev, 0) != CAM_SUCCESS) { + error = EINVAL; + mtx_unlock(&scp->state_lock); + 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; + mtx_unlock(&scp->state_lock); + 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, cold ? BOOT_ATTACH : ATTACH); + error = 0; + mtx_unlock(&scp->state_lock); + +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); + + mtx_lock(&scp->state_lock); + if (xpt_sim_opened(scp->sim)) { + mtx_unlock(&scp->state_lock); + return (EBUSY); + } + xpt_freeze_simq(scp->sim, 1 /*count*/); + scp->flags |= DETACHING; + mtx_unlock(&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) { + mtx_lock(&scp->state_lock); + reinit_bus(scp, RESET); + mtx_unlock(&scp->state_lock); + } + 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; + } + + 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]); + free(children, M_TEMP); + + switch (reason) { + case BOOT_ATTACH: + case ATTACH: + break; + case RESET: + xpt_async(AC_BUS_RESET, scp->path, NULL); + + if (!dev_changed) + break; + + cam_rescan(scp->sim); + break; + } +} + +static void +setup_async_cb(struct atapi_xpt_softc *scp, uint32_t events) +{ + struct ccb_setasync csa; + + 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); +} + +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_SPI; + cpi->transport_version = 2; + cpi->protocol = PROTO_SCSI; + cpi->protocol_version = SCSI_REV_2; + + if (softc->ata_ch && tid != CAM_TARGET_WILDCARD) { + if (softc->atadev[tid] == NULL) { + ccb->ccb_h.status = CAM_DEV_NOT_THERE; + xpt_done(ccb); + 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; + case ATA_SA150: + cpi->base_transfer_speed = 150000; + break; + case ATA_SA300: + cpi->base_transfer_speed = 300000; + break; + default: + break; + } + } + cpi->maxio = softc->ata_ch->dma.max_iosize ? + softc->ata_ch->dma.max_iosize : DFLTPHYS; + 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")); + mtx_unlock(&softc->state_lock); + ata_controlcmd(softc->atadev[tid]->dev, ATA_DEVICE_RESET, 0, 0, 0); + mtx_lock(&softc->state_lock); + 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")); + mtx_unlock(&softc->state_lock); + ata_reinit(softc->parent); + mtx_lock(&softc->state_lock); + 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_SPI; + 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_ATAPI; + + CAM_DEBUG(ccb_h->path, CAM_DEBUG_SUBTRACE, ("XPT_SCSI_IO\n")); + + if (softc->flags & DETACHING) { + ccb->ccb_h.status = CAM_REQ_ABORTED; + xpt_done(ccb); + return; + } + + if (softc->atadev[tid] == NULL) { + ccb->ccb_h.status = CAM_DEV_NOT_THERE; + xpt_done(ccb); + return; + } + + /* check that this request was not aborted already */ + if ((ccb_h->status & CAM_STATUS_MASK) != CAM_REQ_INPROG) { + printf("XPT_SCSI_IO received but already in progress?\n"); + xpt_done(ccb); + 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); + printf("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) { + printf("cannot allocate ATAPI/CAM hcb\n"); + goto action_oom; + } + if ((request = ata_alloc_request()) == NULL) { + printf("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]; + + printf("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; + /* FALLTHROUGH */ + + case READ_10: + /* FALLTHROUGH */ + case WRITE_10: + /* FALLTHROUGH */ + case READ_12: + /* FALLTHROUGH */ + case WRITE_12: + /* + * Enable DMA (if target supports it) for READ and WRITE commands + * only, as some combinations of drive, controller and chipset do + * not behave correctly when DMA is enabled for other commands. + */ + if (softc->atadev[tid]->mode >= ATA_DMA) + request_flags |= ATA_R_DMA; + break; + + } + + if ((ccb_h->flags & CAM_DIR_MASK) == CAM_DIR_IN && (len & 1)) { + /* ATA always transfers an even number of bytes */ + if ((buf = hcb->dxfer_alloc + = malloc(++len, M_ATACAM, M_NOWAIT | M_ZERO)) == NULL) { + printf("cannot allocate ATAPI/CAM buffer\n"); + goto action_oom; + } + } + request->dev = softc->atadev[tid]->dev; + request->driver = hcb; + request->data = buf; + request->bytecount = len; + request->transfersize = min(request->bytecount, 65534); + request->timeout = (ccb_h->timeout + 999) / 1000; + 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; + mtx_unlock(&softc->state_lock); + + ata_queue_request(request); + mtx_lock(&softc->state_lock); + 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); + xpt_print_path(ccb_h->path); + printf("out of memory, freezing queue.\n"); + softc->flags |= RESOURCE_SHORTAGE; + xpt_freeze_simq(sim, /*count*/ 1); + ccb_h->status = CAM_REQUEUE_REQ; + xpt_done(ccb); + return; + +action_invalid: + ccb_h->status = CAM_REQ_INVALID; + xpt_done(ccb); + return; +} + +static void +atapi_poll(struct cam_sim *sim) +{ + struct atapi_xpt_softc *softc = + (struct atapi_xpt_softc*)cam_sim_softc(sim); + + mtx_unlock(&softc->state_lock); + ata_interrupt(softc->ata_ch); + mtx_lock(&softc->state_lock); +} + +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)) { + printf("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 + 999) / 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); + } + } + + mtx_lock(&scp->state_lock); + free_hcb_and_ccb_done(hcb, rc); + mtx_unlock(&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) +{ + int targ; + + GIANT_REQUIRED; + + switch (code) { + case AC_LOST_DEVICE: + targ = xpt_path_target_id(path); + xpt_print_path(path); + if (targ == -1) + printf("Lost host adapter\n"); + else + printf("Lost target %d???\n", targ); + break; + + default: + break; + } +} + +static void +cam_rescan(struct cam_sim *sim) +{ + union ccb *ccb; + + ccb = xpt_alloc_ccb_nowait(); + if (ccb == NULL) + return; + if (xpt_create_path(&ccb->ccb_h.path, xpt_periph, cam_sim_path(sim), + CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) { + xpt_free_ccb(ccb); + return; + } + CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("Rescanning ATAPI bus.\n")); + xpt_rescan(ccb); + /* scan is in progress now */ +} + +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 *) + malloc(sizeof(struct atapi_hcb), M_ATACAM, M_NOWAIT | M_ZERO); + + if (hcb != NULL) { + 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) + free(hcb->dxfer_alloc, M_ATACAM); + free(hcb, M_ATACAM); +} + +static void +free_softc(struct atapi_xpt_softc *scp) +{ + struct atapi_hcb *hcb, *thcb; + + if (scp != NULL) { + mtx_lock(&scp->state_lock); + TAILQ_FOREACH_SAFE(hcb, &scp->pending_hcbs, chain, thcb) { + free_hcb_and_ccb_done(hcb, CAM_UNREC_HBA_ERROR); + } + 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, /*free_devq*/TRUE); + else + printf("Can't free %s SIM (still registered)\n", + cam_sim_name(scp->sim)); + } + mtx_destroy(&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) + free(scp, M_ATACAM); + } + free(devlist, M_TEMP); + } + break; + + default: + break; + } + return 0; +} |
