NetBSD/sys/dev/ic/icpsp.c

347 lines
9.5 KiB
C

/* $NetBSD: icpsp.c,v 1.17 2007/03/04 06:01:56 christos Exp $ */
/*-
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Doran.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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>
__KERNEL_RCSID(0, "$NetBSD: icpsp.c,v 1.17 2007/03/04 06:01:56 christos Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/queue.h>
#include <sys/proc.h>
#include <sys/buf.h>
#include <sys/endian.h>
#include <sys/malloc.h>
#include <sys/scsiio.h>
#include <sys/lock.h>
#include <sys/bswap.h>
#include <machine/bus.h>
#include <uvm/uvm_extern.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsi_disk.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <dev/scsipi/scsi_message.h>
#include <dev/ic/icpreg.h>
#include <dev/ic/icpvar.h>
struct icpsp_softc {
struct device sc_dv;
struct scsipi_adapter sc_adapter;
struct scsipi_channel sc_channel;
int sc_busno;
int sc_openings;
};
void icpsp_attach(struct device *, struct device *, void *);
void icpsp_intr(struct icp_ccb *);
int icpsp_match(struct device *, struct cfdata *, void *);
void icpsp_scsipi_request(struct scsipi_channel *, scsipi_adapter_req_t,
void *);
void icpsp_adjqparam(struct device *, int);
CFATTACH_DECL(icpsp, sizeof(struct icpsp_softc),
icpsp_match, icpsp_attach, NULL, NULL);
static const struct icp_servicecb icpsp_servicecb = {
icpsp_adjqparam,
};
int
icpsp_match(struct device *parent, struct cfdata *match,
void *aux)
{
struct icp_attach_args *icpa;
icpa = aux;
return (icpa->icpa_unit >= ICPA_UNIT_SCSI);
}
void
icpsp_attach(struct device *parent, struct device *self, void *aux)
{
struct icp_attach_args *icpa;
struct icpsp_softc *sc;
struct icp_softc *icp;
icpa = (struct icp_attach_args *)aux;
sc = (struct icpsp_softc *)self;
icp = (struct icp_softc *)parent;
sc->sc_busno = icpa->icpa_unit - ICPA_UNIT_SCSI;
sc->sc_openings = icp->icp_openings;
printf(": physical SCSI channel %d\n", sc->sc_busno);
icp_register_servicecb(icp, icpa->icpa_unit, &icpsp_servicecb);
sc->sc_adapter.adapt_dev = &sc->sc_dv;
sc->sc_adapter.adapt_nchannels = 1;
sc->sc_adapter.adapt_openings = icp->icp_openings;
sc->sc_adapter.adapt_max_periph = icp->icp_openings;
sc->sc_adapter.adapt_minphys = minphys;
sc->sc_adapter.adapt_request = icpsp_scsipi_request;
sc->sc_channel.chan_adapter = &sc->sc_adapter;
sc->sc_channel.chan_bustype = &scsi_bustype;
sc->sc_channel.chan_channel = 0;
sc->sc_channel.chan_ntargets = ((icp->icp_class & ICP_FC) != 0 ?
127 : 16); /* XXX bogus check */
sc->sc_channel.chan_nluns = 8;
sc->sc_channel.chan_id = icp->icp_bus_id[sc->sc_busno];
sc->sc_channel.chan_flags = SCSIPI_CHAN_NOSETTLE;
config_found(self, &sc->sc_channel, scsiprint);
}
void
icpsp_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req,
void *arg)
{
struct scsipi_xfer *xs;
struct scsipi_periph *periph;
struct icpsp_softc *sc;
struct icp_rawcmd *rc;
struct icp_softc *icp;
struct icp_ccb *ic;
int rv, flags, s, soff;
sc = (void *)chan->chan_adapter->adapt_dev;
icp = (struct icp_softc *)device_parent(&sc->sc_dv);
switch (req) {
case ADAPTER_REQ_RUN_XFER:
xs = arg;
periph = xs->xs_periph;
flags = xs->xs_control;
SC_DEBUG(periph, SCSIPI_DB2, ("icpsp_scsi_request run_xfer\n"));
if ((flags & XS_CTL_RESET) != 0) {
/* XXX Unimplemented. */
xs->error = XS_DRIVER_STUFFUP;
scsipi_done(xs);
return;
}
#if defined(ICP_DEBUG) || defined(SCSIDEBUG)
if (xs->cmdlen > sizeof(rc->rc_cdb))
panic("%s: CDB too large", sc->sc_dv.dv_xname);
#endif
/*
* Allocate a CCB.
*/
if (__predict_false((ic = icp_ccb_alloc(icp)) == NULL)) {
xs->error = XS_RESOURCE_SHORTAGE;
scsipi_done(xs);
return;
}
rc = &ic->ic_cmd.cmd_packet.rc;
ic->ic_sg = rc->rc_sg;
ic->ic_service = ICP_SCSIRAWSERVICE;
soff = ICP_SCRATCH_SENSE + ic->ic_ident *
sizeof(struct scsi_sense_data);
/*
* Build the command. We don't need to actively prevent
* access to array components, since the controller kindly
* takes care of that for us.
*/
ic->ic_cmd.cmd_opcode = htole16(ICP_WRITE);
memcpy(rc->rc_cdb, xs->cmd, xs->cmdlen);
rc->rc_padding0 = 0;
rc->rc_direction = htole32((flags & XS_CTL_DATA_IN) != 0 ?
ICP_DATA_IN : ICP_DATA_OUT);
rc->rc_mdisc_time = 0;
rc->rc_mcon_time = 0;
rc->rc_clen = htole32(xs->cmdlen);
rc->rc_target = periph->periph_target;
rc->rc_lun = periph->periph_lun;
rc->rc_bus = sc->sc_busno;
rc->rc_priority = 0;
rc->rc_sense_len = htole32(sizeof(xs->sense.scsi_sense));
rc->rc_sense_addr =
htole32(soff + icp->icp_scr_seg[0].ds_addr);
rc->rc_padding1 = 0;
if (xs->datalen != 0) {
rv = icp_ccb_map(icp, ic, xs->data, xs->datalen,
(flags & XS_CTL_DATA_IN) != 0 ? IC_XFER_IN :
IC_XFER_OUT);
if (rv != 0) {
icp_ccb_free(icp, ic);
xs->error = XS_DRIVER_STUFFUP;
scsipi_done(xs);
return;
}
rc->rc_nsgent = htole32(ic->ic_nsgent);
rc->rc_sdata = ~0;
rc->rc_sdlen = htole32(xs->datalen);
} else {
rc->rc_nsgent = 0;
rc->rc_sdata = 0;
rc->rc_sdlen = 0;
}
ic->ic_cmdlen = (u_long)ic->ic_sg - (u_long)&ic->ic_cmd +
ic->ic_nsgent * sizeof(*ic->ic_sg);
bus_dmamap_sync(icp->icp_dmat, icp->icp_scr_dmamap, soff,
sizeof(xs->sense.scsi_sense), BUS_DMASYNC_PREREAD);
/*
* Fire it off to the controller.
*/
ic->ic_intr = icpsp_intr;
ic->ic_context = xs;
ic->ic_dv = &sc->sc_dv;
if ((flags & XS_CTL_POLL) != 0) {
s = splbio();
rv = icp_ccb_poll(icp, ic, xs->timeout);
if (rv != 0) {
if (xs->datalen != 0)
icp_ccb_unmap(icp, ic);
icp_ccb_free(icp, ic);
xs->error = XS_TIMEOUT;
scsipi_done(xs);
/*
* XXX We're now in a bad way, because we
* don't know how to abort the command.
* That shouldn't matter too much, since
* polled commands won't be used while the
* system is running.
*/
}
splx(s);
} else
icp_ccb_enqueue(icp, ic);
break;
case ADAPTER_REQ_GROW_RESOURCES:
case ADAPTER_REQ_SET_XFER_MODE:
/*
* Neither of these cases are supported, and neither of them
* is particulatly relevant, since we have an abstract view
* of the bus; the controller takes care of all the nitty
* gritty.
*/
break;
}
}
void
icpsp_intr(struct icp_ccb *ic)
{
struct scsipi_xfer *xs;
struct icpsp_softc *sc;
struct icp_softc *icp;
int soff;
sc = (struct icpsp_softc *)ic->ic_dv;
xs = (struct scsipi_xfer *)ic->ic_context;
icp = (struct icp_softc *)device_parent(ic->ic_dv);
soff = ICP_SCRATCH_SENSE + ic->ic_ident *
sizeof(struct scsi_sense_data);
SC_DEBUG(xs->xs_periph, SCSIPI_DB2, ("icpsp_intr\n"));
bus_dmamap_sync(icp->icp_dmat, icp->icp_scr_dmamap, soff,
sizeof(xs->sense.scsi_sense), BUS_DMASYNC_POSTREAD);
if (ic->ic_status == ICP_S_OK) {
xs->status = SCSI_OK;
xs->resid = 0;
} else if (ic->ic_status != ICP_S_RAW_SCSI || icp->icp_info >= 0x100) {
xs->error = XS_SELTIMEOUT;
xs->resid = xs->datalen;
} else {
xs->status = icp->icp_info;
switch (xs->status) {
case SCSI_OK:
#ifdef DIAGNOSTIC
printf("%s: error return (%d), but SCSI_OK?\n",
sc->sc_dv.dv_xname, icp->icp_info);
#endif
xs->resid = 0;
break;
case SCSI_CHECK:
memcpy(&xs->sense.scsi_sense,
(char *)icp->icp_scr + soff,
sizeof(xs->sense.scsi_sense));
xs->error = XS_SENSE;
/* FALLTHROUGH */
default:
/*
* XXX Don't know how to get residual count.
*/
xs->resid = xs->datalen;
break;
}
}
if (xs->datalen != 0)
icp_ccb_unmap(icp, ic);
icp_ccb_free(icp, ic);
scsipi_done(xs);
}
void
icpsp_adjqparam(struct device *dv, int openings)
{
struct icpsp_softc *sc = (struct icpsp_softc *) dv;
int s;
s = splbio();
sc->sc_adapter.adapt_openings += openings - sc->sc_openings;
sc->sc_openings = openings;
splx(s);
}