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NetBSD/sys/dev/ic/ld_aac.c

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/* $NetBSD: ld_aac.c,v 1.6 2004/10/28 07:07:40 yamt 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: ld_aac.c,v 1.6 2004/10/28 07:07:40 yamt Exp $");
#include "rnd.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <sys/bufq.h>
#include <sys/endian.h>
#include <sys/dkio.h>
#include <sys/disk.h>
#if NRND > 0
#include <sys/rnd.h>
#endif
#include <machine/bus.h>
#include <uvm/uvm_extern.h>
#include <dev/ldvar.h>
#include <dev/ic/aacreg.h>
#include <dev/ic/aacvar.h>
struct ld_aac_softc {
struct ld_softc sc_ld;
int sc_hwunit;
};
static void ld_aac_attach(struct device *, struct device *, void *);
static void ld_aac_intr(struct aac_ccb *);
static int ld_aac_dobio(struct ld_aac_softc *, void *, int, int, int,
struct buf *);
static int ld_aac_dump(struct ld_softc *, void *, int, int);
static int ld_aac_match(struct device *, struct cfdata *, void *);
static int ld_aac_start(struct ld_softc *, struct buf *);
CFATTACH_DECL(ld_aac, sizeof(struct ld_aac_softc),
ld_aac_match, ld_aac_attach, NULL, NULL);
static int
ld_aac_match(struct device *parent, struct cfdata *match, void *aux)
{
return (1);
}
static void
ld_aac_attach(struct device *parent, struct device *self, void *aux)
{
struct aac_attach_args *aaca;
struct aac_drive *hdr;
struct ld_aac_softc *sc;
struct ld_softc *ld;
struct aac_softc *aac;
aaca = aux;
aac = (struct aac_softc *)parent;
sc = (struct ld_aac_softc *)self;
ld = &sc->sc_ld;
hdr = &aac->sc_hdr[aaca->aaca_unit];
sc->sc_hwunit = aaca->aaca_unit;
ld->sc_flags = LDF_ENABLED;
ld->sc_maxxfer = AAC_MAX_XFER;
ld->sc_secperunit = hdr->hd_size;
ld->sc_secsize = AAC_SECTOR_SIZE;
ld->sc_maxqueuecnt = (AAC_NCCBS - AAC_NCCBS_RESERVE) / aac->sc_nunits;
ld->sc_start = ld_aac_start;
ld->sc_dump = ld_aac_dump;
printf(": %s\n",
aac_describe_code(aac_container_types, hdr->hd_devtype));
ldattach(ld);
}
static int
ld_aac_dobio(struct ld_aac_softc *sc, void *data, int datasize, int blkno,
int dowrite, struct buf *bp)
{
struct aac_blockread_response *brr;
struct aac_blockwrite_response *bwr;
struct aac_ccb *ac;
struct aac_softc *aac;
struct aac_blockread *br;
struct aac_blockwrite *bw;
struct aac_sg_entry *sge;
struct aac_sg_table *sgt;
struct aac_fib *fib;
bus_dmamap_t xfer;
u_int32_t status;
u_int16_t size;
int s, rv, i;
aac = (struct aac_softc *)sc->sc_ld.sc_dv.dv_parent;
/*
* Allocate a command control block and map the data transfer.
*/
ac = aac_ccb_alloc(aac, (dowrite ? AAC_CCB_DATA_OUT : AAC_CCB_DATA_IN));
ac->ac_data = data;
ac->ac_datalen = datasize;
if ((rv = aac_ccb_map(aac, ac)) != 0) {
aac_ccb_free(aac, ac);
return (rv);
}
/*
* Build the command.
*/
fib = ac->ac_fib;
fib->Header.XferState = htole32(AAC_FIBSTATE_HOSTOWNED |
AAC_FIBSTATE_INITIALISED | AAC_FIBSTATE_FROMHOST |
AAC_FIBSTATE_REXPECTED | AAC_FIBSTATE_NORM);
fib->Header.Command = htole16(ContainerCommand);
if (dowrite) {
bw = (struct aac_blockwrite *)&fib->data[0];
bw->Command = htole32(VM_CtBlockWrite);
bw->ContainerId = htole32(sc->sc_hwunit);
bw->BlockNumber = htole32(blkno);
bw->ByteCount = htole32(datasize);
bw->Stable = htole32(CUNSTABLE); /* XXX what's appropriate here? */
size = sizeof(struct aac_blockwrite);
sgt = &bw->SgMap;
} else {
br = (struct aac_blockread *)&fib->data[0];
br->Command = htole32(VM_CtBlockRead);
br->ContainerId = htole32(sc->sc_hwunit);
br->BlockNumber = htole32(blkno);
br->ByteCount = htole32(datasize);
size = sizeof(struct aac_blockread);
sgt = &br->SgMap;
}
xfer = ac->ac_dmamap_xfer;
sgt->SgCount = xfer->dm_nsegs;
sge = sgt->SgEntry;
for (i = 0; i < xfer->dm_nsegs; i++, sge++) {
sge->SgAddress = htole32(xfer->dm_segs[i].ds_addr);
sge->SgByteCount = htole32(xfer->dm_segs[i].ds_len);
AAC_DPRINTF(AAC_D_IO,
("#%d va %p pa %lx len %x\n", i, data,
(u_long)xfer->dm_segs[i].ds_addr,
xfer->dm_segs[i].ds_len));
}
size += xfer->dm_nsegs * sizeof(struct aac_sg_entry);
size = htole16(sizeof(fib->Header) + size);
fib->Header.Size = htole16(size);
if (bp == NULL) {
/*
* Polled commands must not sit on the software queue. Wait
* up to 30 seconds for the command to complete.
*/
s = splbio();
rv = aac_ccb_poll(aac, ac, 30000);
aac_ccb_unmap(aac, ac);
aac_ccb_free(aac, ac);
splx(s);
if (rv == 0) {
if (dowrite) {
bwr = (struct aac_blockwrite_response *)
&ac->ac_fib->data[0];
status = le32toh(bwr->Status);
} else {
brr = (struct aac_blockread_response *)
&ac->ac_fib->data[0];
status = le32toh(brr->Status);
}
if (status != ST_OK) {
printf("%s: I/O error: %s\n",
sc->sc_ld.sc_dv.dv_xname,
aac_describe_code(aac_command_status_table,
status));
rv = EIO;
}
}
} else {
ac->ac_device = (struct device *)sc;
ac->ac_context = bp;
ac->ac_intr = ld_aac_intr;
aac_ccb_enqueue(aac, ac);
rv = 0;
}
return (rv);
}
static int
ld_aac_start(struct ld_softc *ld, struct buf *bp)
{
return (ld_aac_dobio((struct ld_aac_softc *)ld, bp->b_data,
bp->b_bcount, bp->b_rawblkno, (bp->b_flags & B_READ) == 0, bp));
}
static void
ld_aac_intr(struct aac_ccb *ac)
{
struct aac_blockread_response *brr;
struct aac_blockwrite_response *bwr;
struct ld_aac_softc *sc;
struct aac_softc *aac;
struct buf *bp;
u_int32_t status;
bp = ac->ac_context;
sc = (struct ld_aac_softc *)ac->ac_device;
aac = (struct aac_softc *)sc->sc_ld.sc_dv.dv_parent;
if ((bp->b_flags & B_READ) != 0) {
brr = (struct aac_blockread_response *)&ac->ac_fib->data[0];
status = le32toh(brr->Status);
} else {
bwr = (struct aac_blockwrite_response *)&ac->ac_fib->data[0];
status = le32toh(bwr->Status);
}
aac_ccb_unmap(aac, ac);
aac_ccb_free(aac, ac);
if (status != ST_OK) {
bp->b_flags |= B_ERROR;
bp->b_error = EIO;
bp->b_resid = bp->b_bcount;
printf("%s: I/O error: %s\n", sc->sc_ld.sc_dv.dv_xname,
aac_describe_code(aac_command_status_table, status));
} else
bp->b_resid = 0;
lddone(&sc->sc_ld, bp);
}
static int
ld_aac_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt)
{
return (ld_aac_dobio((struct ld_aac_softc *)ld, data,
blkcnt * ld->sc_secsize, blkno, 1, NULL));
}
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