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Update SimOS scsi driver to use CAM.

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This commit is contained in:
Doug Rabson 1998-09-26 14:49:26 +00:00
parent 6ecd6bbf9b
commit 63bbbfc70e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=39687
2 changed files with 179 additions and 149 deletions
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11
sys/alpha/conf/SIMOS
View File

@ -11,18 +11,15 @@
# device lines is present in the ./LINT configuration file. If you are
# in doubt as to the purpose or necessity of a line, check first in LINT.
#
# $Id: SIMOS,v 1.1 1998/06/10 10:54:02 dfr Exp $
# $Id: SIMOS,v 1.2 1998/06/28 00:48:48 dfr Exp $
machine "alpha"
cpu "EV5"
ident GENERIC
maxusers 10
options __FreeBSD__=3 #XXX hack city
options "DEC_KN8AE"
options SIMOS
#options MATH_EMULATE #Support for x87 emulation
options INET #InterNETworking
options FFS #Berkeley Fast Filesystem
options NFS #Network Filesystem
@ -33,11 +30,11 @@ options FFS_ROOT #FFS usable as root device [keep this!]
options NFS_ROOT #NFS usable as root device
options PROCFS #Process filesystem
options "COMPAT_43" #Compatible with BSD 4.3 [KEEP THIS!]
options SCSI_DELAY=15 #Be pessimistic about Joe SCSI device
options SCSI_DELAY=100 #Be pessimistic about Joe SCSI device
options UCONSOLE #Allow users to grab the console
options FAILSAFE #Be conservative
config kernel root on sd0
config kernel root on da0
controller pci0
controller tlsb0
@ -49,7 +46,7 @@ controller simos0
controller scbus0
device sd0
device da0
device od0 #See LINT for possible `od' options.

317
sys/pci/simos.c
View File

@ -23,7 +23,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id$
* $Id: simos.c,v 1.1 1998/06/10 10:57:14 dfr Exp $
*/
#include <sys/param.h>
@ -32,8 +32,14 @@
#include <sys/buf.h>
#include <sys/proc.h>
#include <scsi/scsiconf.h>
#include <scsi/scsi_debug.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_sim.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/clock.h>
#include <vm/vm.h>
@ -48,15 +54,16 @@
#include <machine/alpha_cpu.h>
#define MAX_SIZE (64*1024)
struct simos_softc {
int sc_unit;
struct scsi_link sc_link;
SimOS_SCSI* sc_regs;
int sc_busy;
struct scsi_xfer* sc_head;
struct scsi_xfer* sc_tail;
/*
* SimOS only supports one pending command.
*/
struct cam_sim *sc_sim;
struct cam_path *sc_path;
struct ccb_scsiio *sc_pending;
};
struct simos_softc* simosp[10];
@ -65,6 +72,8 @@ static u_long simos_unit;
static char *simos_probe __P((pcici_t tag, pcidi_t type));
static void simos_attach __P((pcici_t config_d, int unit));
static void simos_action __P((struct cam_sim *sim, union ccb *ccb));
static void simos_poll __P((struct cam_sim *sim));
struct pci_device simos_driver = {
"simos",
@ -75,29 +84,6 @@ struct pci_device simos_driver = {
};
DATA_SET (pcidevice_set, simos_driver);
static int32_t simos_start(struct scsi_xfer * xp);
static void simos_min_phys (struct buf *bp);
static u_int32_t simos_info(int unit);
static struct scsi_adapter simos_switch =
{
simos_start,
simos_min_phys,
0,
0,
simos_info,
"simos"
};
static struct scsi_device simos_dev =
{
NULL, /* Use default error handler */
NULL, /* have a queue, served by this */
NULL, /* have no async handler */
NULL, /* Use default 'done' routine */
"simos",
};
static char *
simos_probe(pcici_t tag, pcidi_t type)
{
@ -114,7 +100,7 @@ static void
simos_attach(pcici_t config_id, int unit)
{
struct simos_softc* sc;
struct scsibus_data* scbus;
struct cam_devq *devq;
sc = malloc(sizeof(struct simos_softc), M_DEVBUF, M_WAITOK);
simosp[unit] = sc;
@ -122,69 +108,98 @@ simos_attach(pcici_t config_id, int unit)
sc->sc_unit = unit;
sc->sc_regs = (SimOS_SCSI*) SIMOS_SCSI_ADDR;
sc->sc_busy = 0;
sc->sc_head = 0;
sc->sc_tail = 0;
sc->sc_pending = 0;
sc->sc_link.adapter_unit = unit;
sc->sc_link.adapter_softc = sc;
sc->sc_link.adapter_targ = SIMOS_SCSI_MAXTARG-1;
sc->sc_link.fordriver = 0;
sc->sc_link.adapter = &simos_switch;
sc->sc_link.device = &simos_dev;
sc->sc_link.flags = 0;
devq = cam_simq_alloc(/*maxopenings*/1);
if (devq == NULL)
return;
scbus = scsi_alloc_bus();
scbus->adapter_link = &sc->sc_link;
scbus->maxtarg = 1;
scbus->maxlun = 0;
scsi_attachdevs(scbus);
scbus = 0;
}
static void
simos_enqueue(struct simos_softc* sc, struct scsi_xfer* xp)
{
if (sc->sc_tail) {
sc->sc_tail->next = xp;
} else {
sc->sc_head = sc->sc_tail = xp;
sc->sc_sim = cam_sim_alloc(simos_action, simos_poll, "simos", sc, unit,
/*untagged*/1, /*tagged*/0, devq);
if (sc->sc_sim == NULL) {
cam_simq_free(devq);
return;
}
xp->next = 0;
if (xpt_bus_register(sc->sc_sim, /*bus*/0) != CAM_SUCCESS) {
cam_sim_free(sc->sc_sim, /*free_devq*/TRUE);
return;
}
if (xpt_create_path(&sc->sc_path, /*periph*/NULL,
cam_sim_path(sc->sc_sim), CAM_TARGET_WILDCARD,
CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
xpt_bus_deregister(cam_sim_path(sc->sc_sim));
cam_sim_free(sc->sc_sim, /*free_devq*/TRUE);
return;
}
alpha_register_pci_scsi(config_id->bus, config_id->slot, sc->sc_sim);
return;
}
static void
simos_start_transfer(struct simos_softc* sc)
simos_start(struct simos_softc* sc, struct ccb_scsiio *csio)
{
struct scsi_xfer* xp = sc->sc_head;
struct scsi_generic *cmd;
int cmdlen;
caddr_t data;
int datalen;
int s;
u_int8_t* p;
int i, count, target;
vm_offset_t va;
vm_size_t size;
if (sc->sc_busy || !xp)
cmd = (struct scsi_generic *) &csio->cdb_io.cdb_bytes;
cmdlen = csio->cdb_len;
data = csio->data_ptr;
datalen = csio->dxfer_len;
/*
* Simos doesn't understand some commands
*/
if (cmd->opcode == START_STOP || cmd->opcode == PREVENT_ALLOW
|| cmd->opcode == SYNCHRONIZE_CACHE) {
csio->ccb_h.status = CAM_REQ_CMP;
xpt_done((union ccb *) csio);
return;
}
sc->sc_busy = TRUE;
if (sc->sc_pending) {
/*
* Don't think this can happen.
*/
printf("simos_start: can't start command while one is pending\n");
csio->ccb_h.status = CAM_BUSY;
xpt_done((union ccb *) csio);
return;
}
target = xp->sc_link->target;
s = splcam();
csio->ccb_h.status |= CAM_SIM_QUEUED;
sc->sc_pending = csio;
target = csio->ccb_h.target_id;
/*
* Copy the command into SimOS' buffer
*/
p = (u_int8_t*) xp->cmd;
count = xp->cmdlen;
p = (u_int8_t*) cmd;
count = cmdlen;
for (i = 0; i < count; i++)
sc->sc_regs->cmd[i] = *p++;
sc->sc_regs->length = count;
sc->sc_regs->target = target;
sc->sc_regs->lun = xp->sc_link->lun;
sc->sc_regs->lun = csio->ccb_h.target_lun;
/*
* Setup the segment descriptors.
*/
va = (vm_offset_t) xp->data;
size = xp->datalen;
va = (vm_offset_t) data;
size = datalen;
i = 0;
while (size > 0) {
vm_size_t len = PAGE_SIZE - (va & PAGE_MASK);
@ -204,102 +219,120 @@ simos_start_transfer(struct simos_softc* sc)
alpha_wmb();
sc->sc_regs->startIO = 1;
alpha_wmb();
splx(s);
}
static void
simos_done(struct simos_softc* sc)
{
struct scsi_xfer* xp;
int done;
if (!sc->sc_busy)
return;
xp = sc->sc_head;
struct ccb_scsiio* csio = sc->sc_pending;
int s, done;
/*
* Spurious interrupt caused by my bogus interrupt broadcasting.
*/
if (!sc->sc_regs->done[xp->sc_link->target])
return;
if (!csio)
return;
sc->sc_head = xp->next;
if (!sc->sc_head)
sc->sc_tail = 0;
sc->sc_pending = 0;
sc->sc_busy = FALSE;
done = sc->sc_regs->done[csio->ccb_h.target_id];
if (!done)
return;
done = sc->sc_regs->done[xp->sc_link->target];
if (done >> 16) {
/* Error detected */
xp->error = XS_TIMEOUT;
}
xp->flags |= ITSDONE;
s = splcam();
sc->sc_regs->done[xp->sc_link->target] = 1;
if (done >> 16)
/* Error detected */
csio->ccb_h.status = CAM_CMD_TIMEOUT;
else
csio->ccb_h.status = CAM_REQ_CMP;
/*
* Ack the interrupt to clear it.
*/
sc->sc_regs->done[csio->ccb_h.target_id] = 1;
alpha_wmb();
if (!(xp->flags & SCSI_NOMASK))
scsi_done(xp);
xpt_done((union ccb *) csio);
if (sc->sc_head)
simos_start_transfer(sc);
}
static int32_t
simos_start(struct scsi_xfer * xp)
{
struct simos_softc* sc;
int flags = xp->flags;
int retval = 0;
int s;
sc = xp->sc_link->adapter_softc;
/*
* Reset (chortle) the adapter.
*/
if (flags & SCSI_RESET)
return COMPLETE;
/*
* Simos doesn't understand some commands
*/
if (xp->cmd->opcode == START_STOP || xp->cmd->opcode == PREVENT_ALLOW)
return COMPLETE;
s = splbio();
simos_enqueue(sc, xp);
simos_start_transfer(sc);
if (flags & SCSI_NOMASK) {
/*
* Poll for result
*/
while (!sc->sc_regs->done[xp->sc_link->target])
;
simos_done(sc);
retval = COMPLETE;
} else
retval = SUCCESSFULLY_QUEUED;
splx(s);
return retval;
}
static void
simos_min_phys (struct buf *bp)
simos_action(struct cam_sim *sim, union ccb *ccb)
{
if ((unsigned long)bp->b_bcount > MAX_SIZE) bp->b_bcount = MAX_SIZE;
struct simos_softc* sc = (struct simos_softc *)sim->softc;
switch (ccb->ccb_h.func_code) {
case XPT_SCSI_IO:
{
struct ccb_scsiio *csio;
csio = &ccb->csio;
simos_start(sc, csio);
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);
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);
break;
}
case XPT_RESET_BUS:
{
ccb->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
case XPT_PATH_INQ:
{
struct ccb_pathinq *cpi = &ccb->cpi;
cpi->version_num = 1; /* XXX??? */
cpi->max_target = 2;
cpi->max_lun = 0;
cpi->initiator_id = 7;
cpi->bus_id = sim->bus_id;
strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
strncpy(cpi->hba_vid, "SimOS", HBA_IDLEN);
strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
cpi->unit_number = sim->unit_number;
cpi->ccb_h.status = CAM_REQ_CMP;
xpt_done(ccb);
break;
}
default:
ccb->ccb_h.status = CAM_REQ_INVALID;
xpt_done(ccb);
break;
}
}
static u_int32_t
simos_info(int unit)
{
return 1;
static void
simos_poll(struct cam_sim *sim)
{
simos_done(cam_sim_softc(sim));
}
void