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freebsd-dev/sys/dev/aac/aac_cam.c

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/*-
* Copyright (c) 2002 Adaptec, Inc.
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* CAM front-end for communicating with non-DASD devices
*/
#include "opt_aac.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_debug.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt_sim.h>
#include <cam/scsi/scsi_all.h>
#include <cam/scsi/scsi_message.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/disk.h>
#include <machine/md_var.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <dev/aac/aacreg.h>
#include <sys/aac_ioctl.h>
#include <dev/aac/aacvar.h>
struct aac_cam {
device_t dev;
struct aac_sim *inf;
struct cam_sim *sim;
struct cam_path *path;
};
static int aac_cam_probe(device_t dev);
static int aac_cam_attach(device_t dev);
static int aac_cam_detach(device_t dev);
static void aac_cam_action(struct cam_sim *, union ccb *);
static void aac_cam_poll(struct cam_sim *);
static void aac_cam_complete(struct aac_command *);
static u_int32_t aac_cam_reset_bus(struct cam_sim *, union ccb *);
static u_int32_t aac_cam_abort_ccb(struct cam_sim *, union ccb *);
static u_int32_t aac_cam_term_io(struct cam_sim *, union ccb *);
static devclass_t aac_pass_devclass;
static device_method_t aac_pass_methods[] = {
DEVMETHOD(device_probe, aac_cam_probe),
DEVMETHOD(device_attach, aac_cam_attach),
DEVMETHOD(device_detach, aac_cam_detach),
{ 0, 0 }
};
static driver_t aac_pass_driver = {
"aacp",
aac_pass_methods,
sizeof(struct aac_cam)
};
DRIVER_MODULE(aacp, aac, aac_pass_driver, aac_pass_devclass, 0, 0);
MODULE_DEPEND(aacp, cam, 1, 1, 1);
MALLOC_DEFINE(M_AACCAM, "aaccam", "AAC CAM info");
static void
aac_cam_event(struct aac_softc *sc, struct aac_event *event, void *arg)
{
union ccb *ccb;
struct aac_cam *camsc;
switch (event->ev_type) {
case AAC_EVENT_CMFREE:
ccb = arg;
camsc = ccb->ccb_h.sim_priv.entries[0].ptr;
free(event, M_AACCAM);
xpt_release_simq(camsc->sim, 1);
ccb->ccb_h.status = CAM_REQUEUE_REQ;
xpt_done(ccb);
break;
default:
device_printf(sc->aac_dev, "unknown event %d in aac_cam\n",
event->ev_type);
break;
}
return;
}
static int
aac_cam_probe(device_t dev)
{
fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
return (0);
}
static int
aac_cam_detach(device_t dev)
{
struct aac_softc *sc;
struct aac_cam *camsc;
fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
camsc = (struct aac_cam *)device_get_softc(dev);
sc = camsc->inf->aac_sc;
mtx_lock(&sc->aac_io_lock);
xpt_async(AC_LOST_DEVICE, camsc->path, NULL);
xpt_free_path(camsc->path);
xpt_bus_deregister(cam_sim_path(camsc->sim));
cam_sim_free(camsc->sim, /*free_devq*/TRUE);
mtx_unlock(&sc->aac_io_lock);
return (0);
}
/*
* Register the driver as a CAM SIM
*/
static int
aac_cam_attach(device_t dev)
{
struct cam_devq *devq;
struct cam_sim *sim;
struct cam_path *path;
struct aac_cam *camsc;
struct aac_sim *inf;
fwprintf(NULL, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
camsc = (struct aac_cam *)device_get_softc(dev);
inf = (struct aac_sim *)device_get_ivars(dev);
camsc->inf = inf;
devq = cam_simq_alloc(inf->TargetsPerBus);
if (devq == NULL)
return (EIO);
sim = cam_sim_alloc(aac_cam_action, aac_cam_poll, "aacp", camsc,
device_get_unit(dev), &inf->aac_sc->aac_io_lock, 1, 1, devq);
if (sim == NULL) {
cam_simq_free(devq);
return (EIO);
}
/* Since every bus has it's own sim, every bus 'appears' as bus 0 */
mtx_lock(&inf->aac_sc->aac_io_lock);
if (xpt_bus_register(sim, dev, 0) != CAM_SUCCESS) {
cam_sim_free(sim, TRUE);
mtx_unlock(&inf->aac_sc->aac_io_lock);
return (EIO);
}
if (xpt_create_path(&path, NULL, cam_sim_path(sim),
CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
xpt_bus_deregister(cam_sim_path(sim));
cam_sim_free(sim, TRUE);
mtx_unlock(&inf->aac_sc->aac_io_lock);
return (EIO);
}
mtx_unlock(&inf->aac_sc->aac_io_lock);
camsc->sim = sim;
camsc->path = path;
return (0);
}
static void
aac_cam_action(struct cam_sim *sim, union ccb *ccb)
{
struct aac_cam *camsc;
struct aac_softc *sc;
struct aac_srb *srb;
struct aac_fib *fib;
struct aac_command *cm;
camsc = (struct aac_cam *)cam_sim_softc(sim);
sc = camsc->inf->aac_sc;
fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
/* Synchronous ops, and ops that don't require communication with the
* controller */
switch(ccb->ccb_h.func_code) {
case XPT_SCSI_IO:
case XPT_RESET_DEV:
/* These are handled down below */
break;
case XPT_CALC_GEOMETRY:
{
struct ccb_calc_geometry *ccg;
u_int32_t size_mb;
u_int32_t secs_per_cylinder;
ccg = &ccb->ccg;
size_mb = ccg->volume_size /
((1024L * 1024L) / ccg->block_size);
if (size_mb >= (2 * 1024)) { /* 2GB */
ccg->heads = 255;
ccg->secs_per_track = 63;
} else if (size_mb >= (1 * 1024)) { /* 1GB */
ccg->heads = 128;
ccg->secs_per_track = 32;
} else {
ccg->heads = 64;
ccg->secs_per_track = 32;
}
secs_per_cylinder = ccg->heads * ccg->secs_per_track;
ccg->cylinders = ccg->volume_size / secs_per_cylinder;
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
return;
}
case XPT_PATH_INQ:
{
struct ccb_pathinq *cpi = &ccb->cpi;
cpi->version_num = 1;
cpi->hba_inquiry = PI_WIDE_16;
cpi->target_sprt = 0;
/* Resetting via the passthrough causes problems. */
cpi->hba_misc = PIM_NOBUSRESET;
cpi->hba_eng_cnt = 0;
cpi->max_target = camsc->inf->TargetsPerBus;
cpi->max_lun = 8; /* Per the controller spec */
cpi->initiator_id = camsc->inf->InitiatorBusId;
cpi->bus_id = camsc->inf->BusNumber;
cpi->base_transfer_speed = 3300;
strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
strncpy(cpi->hba_vid, "Adaptec", HBA_IDLEN);
strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
cpi->unit_number = cam_sim_unit(sim);
cpi->transport = XPORT_SPI;
cpi->transport_version = 2;
cpi->protocol = PROTO_SCSI;
cpi->protocol_version = SCSI_REV_2;
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
return;
}
case XPT_GET_TRAN_SETTINGS:
{
struct ccb_trans_settings_scsi *scsi =
&ccb->cts.proto_specific.scsi;
struct ccb_trans_settings_spi *spi =
&ccb->cts.xport_specific.spi;
ccb->cts.protocol = PROTO_SCSI;
ccb->cts.protocol_version = SCSI_REV_2;
ccb->cts.transport = XPORT_SPI;
ccb->cts.transport_version = 2;
if (ccb->ccb_h.target_lun != CAM_LUN_WILDCARD) {
scsi->valid = CTS_SCSI_VALID_TQ;
spi->valid |= CTS_SPI_VALID_DISC;
} else {
scsi->valid = 0;
}
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
return;
}
case XPT_SET_TRAN_SETTINGS:
ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
xpt_done(ccb);
return;
case XPT_RESET_BUS:
if (!(sc->flags & AAC_FLAGS_CAM_NORESET)) {
ccb->ccb_h.status = aac_cam_reset_bus(sim, ccb);
} else {
ccb->ccb_h.status = CAM_REQ_CMP;
}
xpt_done(ccb);
return;
case XPT_ABORT:
ccb->ccb_h.status = aac_cam_abort_ccb(sim, ccb);
xpt_done(ccb);
return;
case XPT_TERM_IO:
ccb->ccb_h.status = aac_cam_term_io(sim, ccb);
xpt_done(ccb);
return;
default:
device_printf(sc->aac_dev, "Unsupported command 0x%x\n",
ccb->ccb_h.func_code);
ccb->ccb_h.status = CAM_PROVIDE_FAIL;
xpt_done(ccb);
return;
}
/* Async ops that require communcation with the controller */
if (aac_alloc_command(sc, &cm)) {
struct aac_event *event;
xpt_freeze_simq(sim, 1);
ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
ccb->ccb_h.sim_priv.entries[0].ptr = camsc;
event = malloc(sizeof(struct aac_event), M_AACCAM,
M_NOWAIT | M_ZERO);
if (event == NULL) {
device_printf(sc->aac_dev,
"Warning, out of memory for event\n");
return;
}
event->ev_callback = aac_cam_event;
event->ev_arg = ccb;
event->ev_type = AAC_EVENT_CMFREE;
aac_add_event(sc, event);
return;
}
fib = cm->cm_fib;
srb = (struct aac_srb *)&fib->data[0];
cm->cm_datalen = 0;
switch (ccb->ccb_h.flags & CAM_DIR_MASK) {
case CAM_DIR_IN:
srb->flags = AAC_SRB_FLAGS_DATA_IN;
cm->cm_flags |= AAC_CMD_DATAIN;
break;
case CAM_DIR_OUT:
srb->flags = AAC_SRB_FLAGS_DATA_OUT;
cm->cm_flags |= AAC_CMD_DATAOUT;
break;
case CAM_DIR_NONE:
srb->flags = AAC_SRB_FLAGS_NO_DATA_XFER;
break;
default:
srb->flags = AAC_SRB_FLAGS_UNSPECIFIED_DIRECTION;
cm->cm_flags |= AAC_CMD_DATAIN | AAC_CMD_DATAOUT;
break;
}
switch(ccb->ccb_h.func_code) {
case XPT_SCSI_IO:
{
struct ccb_scsiio *csio = &ccb->csio;
srb->function = AAC_SRB_FUNC_EXECUTE_SCSI;
/*
* Copy the CDB into the SRB. It's only 6-16 bytes,
* so a copy is not too expensive.
*/
srb->cdb_len = csio->cdb_len;
if (ccb->ccb_h.flags & CAM_CDB_POINTER)
bcopy(csio->cdb_io.cdb_ptr, (u_int8_t *)&srb->cdb[0],
srb->cdb_len);
else
bcopy(csio->cdb_io.cdb_bytes, (u_int8_t *)&srb->cdb[0],
srb->cdb_len);
/* Set command */
fib->Header.Command = (sc->flags & AAC_FLAGS_SG_64BIT) ?
ScsiPortCommandU64 : ScsiPortCommand;
/* Map the s/g list. XXX 32bit addresses only! */
if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
if ((ccb->ccb_h.flags & CAM_SCATTER_VALID) == 0) {
srb->data_len = csio->dxfer_len;
if (ccb->ccb_h.flags & CAM_DATA_PHYS) {
/* Send a 32bit command */
fib->Header.Command = ScsiPortCommand;
srb->sg_map32.SgCount = 1;
srb->sg_map32.SgEntry[0].SgAddress =
(uint32_t)(uintptr_t)csio->data_ptr;
srb->sg_map32.SgEntry[0].SgByteCount =
csio->dxfer_len;
} else {
/*
* Arrange things so that the S/G
* map will get set up automagically
*/
cm->cm_data = (void *)csio->data_ptr;
cm->cm_datalen = csio->dxfer_len;
cm->cm_sgtable = &srb->sg_map32;
}
} else {
/* XXX Need to handle multiple s/g elements */
panic("aac_cam: multiple s/g elements");
}
} else {
srb->sg_map32.SgCount = 0;
srb->sg_map32.SgEntry[0].SgByteCount = 0;
srb->data_len = 0;
}
break;
}
case XPT_RESET_DEV:
if (!(sc->flags & AAC_FLAGS_CAM_NORESET)) {
srb->function = AAC_SRB_FUNC_RESET_DEVICE;
break;
} else {
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
return;
}
default:
break;
}
srb->bus = camsc->inf->BusNumber; /* Bus number relative to the card */
srb->target = ccb->ccb_h.target_id;
srb->lun = ccb->ccb_h.target_lun;
srb->timeout = ccb->ccb_h.timeout; /* XXX */
srb->retry_limit = 0;
cm->cm_complete = aac_cam_complete;
cm->cm_private = ccb;
cm->cm_timestamp = time_uptime;
cm->cm_queue = AAC_ADAP_NORM_CMD_QUEUE;
fib->Header.XferState =
AAC_FIBSTATE_HOSTOWNED |
AAC_FIBSTATE_INITIALISED |
AAC_FIBSTATE_FROMHOST |
AAC_FIBSTATE_REXPECTED |
AAC_FIBSTATE_NORM;
fib->Header.Size = sizeof(struct aac_fib_header) +
sizeof(struct aac_srb);
aac_enqueue_ready(cm);
aac_startio(cm->cm_sc);
return;
}
static void
aac_cam_poll(struct cam_sim *sim)
{
/*
* Pinging the interrupt routine isn't very safe, nor is it
* really necessary. Do nothing.
*/
}
static void
aac_cam_complete(struct aac_command *cm)
{
union ccb *ccb;
struct aac_srb_response *srbr;
struct aac_softc *sc;
sc = cm->cm_sc;
fwprintf(sc, HBA_FLAGS_DBG_FUNCTION_ENTRY_B, "");
ccb = cm->cm_private;
srbr = (struct aac_srb_response *)&cm->cm_fib->data[0];
if (srbr->fib_status != 0) {
device_printf(sc->aac_dev, "Passthru FIB failed!\n");
ccb->ccb_h.status = CAM_REQ_ABORTED;
} else {
/*
* The SRB error codes just happen to match the CAM error
* codes. How convienient!
*/
ccb->ccb_h.status = srbr->srb_status;
/* Take care of SCSI_IO ops. */
if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
u_int8_t command, device;
ccb->csio.scsi_status = srbr->scsi_status;
/* Take care of autosense */
if (srbr->sense_len) {
int sense_len, scsi_sense_len;
scsi_sense_len = sizeof(struct scsi_sense_data);
bzero(&ccb->csio.sense_data, scsi_sense_len);
sense_len = (srbr->sense_len >
scsi_sense_len) ? scsi_sense_len :
srbr->sense_len;
bcopy(&srbr->sense[0], &ccb->csio.sense_data,
srbr->sense_len);
ccb->csio.sense_len = sense_len;
ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
// scsi_sense_print(&ccb->csio);
}
/* If this is an inquiry command, fake things out */
if (ccb->ccb_h.flags & CAM_CDB_POINTER)
command = ccb->csio.cdb_io.cdb_ptr[0];
else
command = ccb->csio.cdb_io.cdb_bytes[0];
if (command == INQUIRY) {
if (ccb->ccb_h.status == CAM_REQ_CMP) {
device = ccb->csio.data_ptr[0] & 0x1f;
/*
* We want DASD and PROC devices to only be
* visible through the pass device.
*/
if ((device == T_DIRECT) ||
(device == T_PROCESSOR) ||
(sc->flags & AAC_FLAGS_CAM_PASSONLY))
ccb->csio.data_ptr[0] =
((device & 0xe0) | T_NODEVICE);
} else if (ccb->ccb_h.status == CAM_SEL_TIMEOUT &&
ccb->ccb_h.target_lun != 0) {
/* fix for INQUIRYs on Lun>0 */
ccb->ccb_h.status = CAM_DEV_NOT_THERE;
}
}
}
}
aac_release_command(cm);
xpt_done(ccb);
return;
}
static u_int32_t
aac_cam_reset_bus(struct cam_sim *sim, union ccb *ccb)
{
struct aac_fib *fib;
struct aac_softc *sc;
struct aac_cam *camsc;
struct aac_vmioctl *vmi;
struct aac_resetbus *rbc;
int e;
camsc = (struct aac_cam *)cam_sim_softc(sim);
sc = camsc->inf->aac_sc;
if (sc == NULL) {
printf("Null sc?\n");
return (CAM_REQ_ABORTED);
}
aac_alloc_sync_fib(sc, &fib);
vmi = (struct aac_vmioctl *)&fib->data[0];
bzero(vmi, sizeof(struct aac_vmioctl));
vmi->Command = VM_Ioctl;
vmi->ObjType = FT_DRIVE;
vmi->MethId = sc->scsi_method_id;
vmi->ObjId = 0;
vmi->IoctlCmd = ResetBus;
rbc = (struct aac_resetbus *)&vmi->IoctlBuf[0];
rbc->BusNumber = camsc->inf->BusNumber;
e = aac_sync_fib(sc, ContainerCommand, 0, fib,
sizeof(struct aac_vmioctl));
if (e) {
device_printf(sc->aac_dev,"Error %d sending ResetBus command\n",
e);
aac_release_sync_fib(sc);
return (CAM_REQ_ABORTED);
}
aac_release_sync_fib(sc);
return (CAM_REQ_CMP);
}
static u_int32_t
aac_cam_abort_ccb(struct cam_sim *sim, union ccb *ccb)
{
return (CAM_UA_ABORT);
}
static u_int32_t
aac_cam_term_io(struct cam_sim *sim, union ccb *ccb)
{
return (CAM_UA_TERMIO);
}
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