| Current Path : /sys/dev/amr/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //sys/dev/amr/amr_cam.c |
/*-
* Copyright (c) 2000 Michael Smith
* Copyright (c) 2000 BSDi
* 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.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
/*-
* Copyright (c) 2002 Eric Moore
* Copyright (c) 2002 LSI Logic Corporation
* 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.
* 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 party using or redistributing the source code and binary forms
* agrees to the disclaimer below and the terms and conditions set forth
* herein.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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: release/9.1.0/sys/dev/amr/amr_cam.c 184573 2008-11-03 00:53:54Z scottl $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/stat.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt.h>
#include <cam/cam_xpt_sim.h>
#include <cam/cam_debug.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
#include <machine/resource.h>
#include <machine/bus.h>
#include <dev/amr/amrreg.h>
#include <dev/amr/amrvar.h>
static int amr_cam_probe(device_t dev);
static int amr_cam_attach(device_t dev);
static int amr_cam_detach(device_t dev);
static void amr_cam_action(struct cam_sim *sim, union ccb *ccb);
static void amr_cam_poll(struct cam_sim *sim);
static void amr_cam_complete(struct amr_command *ac);
static int amr_cam_command(struct amr_softc *sc, struct amr_command **acp);
static devclass_t amr_pass_devclass;
static device_method_t amr_pass_methods[] = {
DEVMETHOD(device_probe, amr_cam_probe),
DEVMETHOD(device_attach, amr_cam_attach),
DEVMETHOD(device_detach, amr_cam_detach),
{ 0, 0 }
};
static driver_t amr_pass_driver = {
"amrp",
amr_pass_methods,
0
};
DRIVER_MODULE(amrp, amr, amr_pass_driver, amr_pass_devclass, 0, 0);
MODULE_DEPEND(amrp, cam, 1, 1, 1);
MALLOC_DEFINE(M_AMRCAM, "amrcam", "AMR CAM memory");
/***********************************************************************
* Enqueue/dequeue functions
*/
static __inline void
amr_enqueue_ccb(struct amr_softc *sc, union ccb *ccb)
{
TAILQ_INSERT_TAIL(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
}
static __inline void
amr_requeue_ccb(struct amr_softc *sc, union ccb *ccb)
{
TAILQ_INSERT_HEAD(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
}
static __inline union ccb *
amr_dequeue_ccb(struct amr_softc *sc)
{
union ccb *ccb;
if ((ccb = (union ccb *)TAILQ_FIRST(&sc->amr_cam_ccbq)) != NULL)
TAILQ_REMOVE(&sc->amr_cam_ccbq, &ccb->ccb_h, sim_links.tqe);
return(ccb);
}
static int
amr_cam_probe(device_t dev)
{
return (0);
}
/********************************************************************************
* Attach our 'real' SCSI channels to CAM
*/
static int
amr_cam_attach(device_t dev)
{
struct amr_softc *sc;
struct cam_devq *devq;
int chn, error;
sc = device_get_softc(dev);
/* initialise the ccb queue */
TAILQ_INIT(&sc->amr_cam_ccbq);
/*
* Allocate a devq for all our channels combined. This should
* allow for the maximum number of SCSI commands we will accept
* at one time. Save the pointer in the softc so we can find it later
* during detach.
*/
if ((devq = cam_simq_alloc(AMR_MAX_SCSI_CMDS)) == NULL)
return(ENOMEM);
sc->amr_cam_devq = devq;
/*
* Iterate over our channels, registering them with CAM
*/
for (chn = 0; chn < sc->amr_maxchan; chn++) {
/* allocate a sim */
if ((sc->amr_cam_sim[chn] = cam_sim_alloc(amr_cam_action,
amr_cam_poll, "amr", sc, device_get_unit(sc->amr_dev),
&sc->amr_list_lock, 1, AMR_MAX_SCSI_CMDS, devq)) == NULL) {
cam_simq_free(devq);
device_printf(sc->amr_dev, "CAM SIM attach failed\n");
return(ENOMEM);
}
/* register the bus ID so we can get it later */
mtx_lock(&sc->amr_list_lock);
error = xpt_bus_register(sc->amr_cam_sim[chn], sc->amr_dev,chn);
mtx_unlock(&sc->amr_list_lock);
if (error) {
device_printf(sc->amr_dev,
"CAM XPT bus registration failed\n");
return(ENXIO);
}
}
/*
* XXX we should scan the config and work out which devices are
* actually protected.
*/
sc->amr_cam_command = amr_cam_command;
return(0);
}
/********************************************************************************
* Disconnect ourselves from CAM
*/
static int
amr_cam_detach(device_t dev)
{
struct amr_softc *sc;
int chn;
sc = device_get_softc(dev);
mtx_lock(&sc->amr_list_lock);
for (chn = 0; chn < sc->amr_maxchan; chn++) {
/*
* If a sim was allocated for this channel, free it
*/
if (sc->amr_cam_sim[chn] != NULL) {
xpt_bus_deregister(cam_sim_path(sc->amr_cam_sim[chn]));
cam_sim_free(sc->amr_cam_sim[chn], FALSE);
}
}
mtx_unlock(&sc->amr_list_lock);
/* Now free the devq */
if (sc->amr_cam_devq != NULL)
cam_simq_free(sc->amr_cam_devq);
return (0);
}
/***********************************************************************
***********************************************************************
CAM passthrough interface
***********************************************************************
***********************************************************************/
/***********************************************************************
* Handle a request for action from CAM
*/
static void
amr_cam_action(struct cam_sim *sim, union ccb *ccb)
{
struct amr_softc *sc = cam_sim_softc(sim);
switch(ccb->ccb_h.func_code) {
/*
* Perform SCSI I/O to a physical device.
*/
case XPT_SCSI_IO:
{
struct ccb_hdr *ccbh = &ccb->ccb_h;
struct ccb_scsiio *csio = &ccb->csio;
/* Validate the CCB */
ccbh->status = CAM_REQ_INPROG;
/* check the CDB length */
if (csio->cdb_len > AMR_MAX_EXTCDB_LEN)
ccbh->status = CAM_REQ_INVALID;
if ((csio->cdb_len > AMR_MAX_CDB_LEN) &&
(sc->support_ext_cdb == 0))
ccbh->status = CAM_REQ_INVALID;
/* check that the CDB pointer is not to a physical address */
if ((ccbh->flags & CAM_CDB_POINTER) &&
(ccbh->flags & CAM_CDB_PHYS))
ccbh->status = CAM_REQ_INVALID;
/*
* if there is data transfer, it must be to/from a virtual
* address
*/
if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
if (ccbh->flags & CAM_DATA_PHYS)
/* we can't map it */
ccbh->status = CAM_REQ_INVALID;
if (ccbh->flags & CAM_SCATTER_VALID)
/* we want to do the s/g setup */
ccbh->status = CAM_REQ_INVALID;
}
/*
* If the command is to a LUN other than 0, fail it.
* This is probably incorrect, but during testing the
* firmware did not seem to respect the LUN field, and thus
* devices appear echoed.
*/
if (csio->ccb_h.target_lun != 0)
ccbh->status = CAM_DEV_NOT_THERE;
/* if we're happy with the request, queue it for attention */
if (ccbh->status == CAM_REQ_INPROG) {
/* save the channel number in the ccb */
csio->ccb_h.sim_priv.entries[0].field= cam_sim_bus(sim);
amr_enqueue_ccb(sc, ccb);
amr_startio(sc);
return;
}
break;
}
case XPT_CALC_GEOMETRY:
{
cam_calc_geometry(&ccb->ccg, /*extended*/1);
break;
}
/*
* Return path stats. Some of these should probably be amended.
*/
case XPT_PATH_INQ:
{
struct ccb_pathinq *cpi = & ccb->cpi;
debug(3, "XPT_PATH_INQ");
cpi->version_num = 1; /* XXX??? */
cpi->hba_inquiry = PI_SDTR_ABLE|PI_TAG_ABLE|PI_WIDE_16;
cpi->target_sprt = 0;
cpi->hba_misc = PIM_NOBUSRESET|PIM_SEQSCAN;
cpi->hba_eng_cnt = 0;
cpi->max_target = AMR_MAX_TARGETS;
cpi->max_lun = 0 /* AMR_MAX_LUNS*/;
cpi->initiator_id = 7; /* XXX variable? */
strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
strncpy(cpi->hba_vid, "LSI", HBA_IDLEN);
strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
cpi->unit_number = cam_sim_unit(sim);
cpi->bus_id = cam_sim_bus(sim);
cpi->base_transfer_speed = 132 * 1024; /* XXX */
cpi->transport = XPORT_SPI;
cpi->transport_version = 2;
cpi->protocol = PROTO_SCSI;
cpi->protocol_version = SCSI_REV_2;
cpi->ccb_h.status = CAM_REQ_CMP;
break;
}
case XPT_RESET_BUS:
{
struct ccb_pathinq *cpi = & ccb->cpi;
debug(1, "XPT_RESET_BUS");
cpi->ccb_h.status = CAM_REQ_CMP;
break;
}
case XPT_RESET_DEV:
{
debug(1, "XPT_RESET_DEV");
ccb->ccb_h.status = CAM_REQ_CMP;
break;
}
case XPT_GET_TRAN_SETTINGS:
{
struct ccb_trans_settings *cts = &(ccb->cts);
debug(3, "XPT_GET_TRAN_SETTINGS");
struct ccb_trans_settings_scsi *scsi;
struct ccb_trans_settings_spi *spi;
scsi = &cts->proto_specific.scsi;
spi = &cts->xport_specific.spi;
cts->protocol = PROTO_SCSI;
cts->protocol_version = SCSI_REV_2;
cts->transport = XPORT_SPI;
cts->transport_version = 2;
if (cts->type == CTS_TYPE_USER_SETTINGS) {
ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
break;
}
spi->flags = CTS_SPI_FLAGS_DISC_ENB;
spi->bus_width = MSG_EXT_WDTR_BUS_32_BIT;
spi->sync_period = 6; /* 40MHz how wide is this bus? */
spi->sync_offset = 31; /* How to extract this from board? */
spi->valid = CTS_SPI_VALID_SYNC_RATE
| CTS_SPI_VALID_SYNC_OFFSET
| CTS_SPI_VALID_BUS_WIDTH
| CTS_SPI_VALID_DISC;
scsi->valid = CTS_SCSI_VALID_TQ;
ccb->ccb_h.status = CAM_REQ_CMP;
break;
}
case XPT_SET_TRAN_SETTINGS:
debug(3, "XPT_SET_TRAN_SETTINGS");
ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
break;
/*
* Reject anything else as unsupported.
*/
default:
/* we can't do this */
ccb->ccb_h.status = CAM_REQ_INVALID;
break;
}
mtx_assert(&sc->amr_list_lock, MA_OWNED);
xpt_done(ccb);
}
/***********************************************************************
* Convert a CAM CCB off the top of the CCB queue to a passthrough SCSI
* command.
*/
static int
amr_cam_command(struct amr_softc *sc, struct amr_command **acp)
{
struct amr_command *ac;
struct amr_passthrough *ap;
struct amr_ext_passthrough *aep;
struct ccb_scsiio *csio;
int bus, target, error;
error = 0;
ac = NULL;
ap = NULL;
aep = NULL;
/* check to see if there is a ccb for us to work with */
if ((csio = (struct ccb_scsiio *)amr_dequeue_ccb(sc)) == NULL)
goto out;
/* get bus/target, XXX validate against protected devices? */
bus = csio->ccb_h.sim_priv.entries[0].field;
target = csio->ccb_h.target_id;
/*
* Build a passthrough command.
*/
/* construct command */
if ((ac = amr_alloccmd(sc)) == NULL) {
error = ENOMEM;
goto out;
}
/* construct passthrough */
if (sc->support_ext_cdb ) {
aep = &ac->ac_ccb->ccb_epthru;
aep->ap_timeout = 2;
aep->ap_ars = 1;
aep->ap_request_sense_length = 14;
aep->ap_islogical = 0;
aep->ap_channel = bus;
aep->ap_scsi_id = target;
aep->ap_logical_drive_no = csio->ccb_h.target_lun;
aep->ap_cdb_length = csio->cdb_len;
aep->ap_data_transfer_length = csio->dxfer_len;
if (csio->ccb_h.flags & CAM_CDB_POINTER) {
bcopy(csio->cdb_io.cdb_ptr, aep->ap_cdb, csio->cdb_len);
} else {
bcopy(csio->cdb_io.cdb_bytes, aep->ap_cdb,
csio->cdb_len);
}
/*
* we leave the data s/g list and s/g count to the map routine
* later
*/
debug(2, " COMMAND %x/%d+%d to %d:%d:%d", aep->ap_cdb[0],
aep->ap_cdb_length, csio->dxfer_len, aep->ap_channel,
aep->ap_scsi_id, aep->ap_logical_drive_no);
} else {
ap = &ac->ac_ccb->ccb_pthru;
ap->ap_timeout = 0;
ap->ap_ars = 1;
ap->ap_request_sense_length = 14;
ap->ap_islogical = 0;
ap->ap_channel = bus;
ap->ap_scsi_id = target;
ap->ap_logical_drive_no = csio->ccb_h.target_lun;
ap->ap_cdb_length = csio->cdb_len;
ap->ap_data_transfer_length = csio->dxfer_len;
if (csio->ccb_h.flags & CAM_CDB_POINTER) {
bcopy(csio->cdb_io.cdb_ptr, ap->ap_cdb, csio->cdb_len);
} else {
bcopy(csio->cdb_io.cdb_bytes, ap->ap_cdb,
csio->cdb_len);
}
/*
* we leave the data s/g list and s/g count to the map routine
* later
*/
debug(2, " COMMAND %x/%d+%d to %d:%d:%d", ap->ap_cdb[0],
ap->ap_cdb_length, csio->dxfer_len, ap->ap_channel,
ap->ap_scsi_id, ap->ap_logical_drive_no);
}
ac->ac_flags |= AMR_CMD_CCB;
ac->ac_data = csio->data_ptr;
ac->ac_length = csio->dxfer_len;
if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
ac->ac_flags |= AMR_CMD_DATAIN;
if ((csio->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_OUT)
ac->ac_flags |= AMR_CMD_DATAOUT;
ac->ac_private = csio;
ac->ac_complete = amr_cam_complete;
if ( sc->support_ext_cdb ) {
ac->ac_mailbox.mb_command = AMR_CMD_EXTPASS;
} else {
ac->ac_mailbox.mb_command = AMR_CMD_PASS;
}
out:
if (error != 0) {
if (ac != NULL)
amr_releasecmd(ac);
if (csio != NULL)
/* put it back and try again later */
amr_requeue_ccb(sc, (union ccb *)csio);
}
*acp = ac;
return(error);
}
/***********************************************************************
* Check for interrupt status
*/
static void
amr_cam_poll(struct cam_sim *sim)
{
amr_done(cam_sim_softc(sim));
}
/**********************************************************************
* Handle completion of a command submitted via CAM.
*/
static void
amr_cam_complete(struct amr_command *ac)
{
struct amr_passthrough *ap;
struct amr_ext_passthrough *aep;
struct ccb_scsiio *csio;
struct scsi_inquiry_data *inq;
int scsi_status, cdb0;
ap = &ac->ac_ccb->ccb_pthru;
aep = &ac->ac_ccb->ccb_epthru;
csio = (struct ccb_scsiio *)ac->ac_private;
inq = (struct scsi_inquiry_data *)csio->data_ptr;
if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
scsi_status = aep->ap_scsi_status;
else
scsi_status = ap->ap_scsi_status;
debug(1, "status 0x%x AP scsi_status 0x%x", ac->ac_status,
scsi_status);
/* Make sure the status is sane */
if ((ac->ac_status != AMR_STATUS_SUCCESS) && (scsi_status == 0)) {
csio->ccb_h.status = CAM_REQ_CMP_ERR;
goto out;
}
/*
* Hide disks from CAM so that they're not picked up and treated as
* 'normal' disks.
*
* If the configuration provides a mechanism to mark a disk a "not
* managed", we could add handling for that to allow disks to be
* selectively visible.
*/
/* handle passthrough SCSI status */
switch(scsi_status) {
case 0: /* completed OK */
if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
cdb0 = aep->ap_cdb[0];
else
cdb0 = ap->ap_cdb[0];
if ((cdb0 == INQUIRY) && (SID_TYPE(inq) == T_DIRECT))
inq->device = (inq->device & 0xe0) | T_NODEVICE;
csio->ccb_h.status = CAM_REQ_CMP;
break;
case 0x02:
csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
csio->scsi_status = SCSI_STATUS_CHECK_COND;
if (ac->ac_mailbox.mb_command == AMR_CMD_EXTPASS)
bcopy(aep->ap_request_sense_area, &csio->sense_data,
AMR_MAX_REQ_SENSE_LEN);
else
bcopy(ap->ap_request_sense_area, &csio->sense_data,
AMR_MAX_REQ_SENSE_LEN);
csio->sense_len = AMR_MAX_REQ_SENSE_LEN;
csio->ccb_h.status |= CAM_AUTOSNS_VALID;
break;
case 0x08:
csio->ccb_h.status = CAM_SCSI_BUSY;
break;
case 0xf0:
case 0xf4:
default:
/*
* Non-zero LUNs are already filtered, so there's no need
* to return CAM_DEV_NOT_THERE.
*/
csio->ccb_h.status = CAM_SEL_TIMEOUT;
break;
}
out:
if ((csio->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE)
debug(2, "%*D\n", imin(csio->dxfer_len, 16), csio->data_ptr,
" ");
mtx_lock(&ac->ac_sc->amr_list_lock);
xpt_done((union ccb *)csio);
amr_releasecmd(ac);
mtx_unlock(&ac->ac_sc->amr_list_lock);
}