324 lines
8.5 KiB
C
324 lines
8.5 KiB
C
/* $wasabi: ld_twa.c,v 1.9 2006/02/14 18:44:37 jordanr Exp $ */
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/* $NetBSD: ld_twa.c,v 1.9 2007/10/19 12:00:51 ad Exp $ */
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/*-
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* Copyright (c) 2000, 2001, 2002, 2003, 2004 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Doran, and by Jason R. Thorpe and Jordan Rhody of Wasabi
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* Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* 3ware "Apache" RAID controller front-end for ld(4) driver.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ld_twa.c,v 1.9 2007/10/19 12:00:51 ad Exp $");
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#include "rnd.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/device.h>
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#include <sys/buf.h>
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#include <sys/bufq.h>
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#include <sys/endian.h>
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#include <sys/dkio.h>
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#include <sys/disk.h>
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#include <sys/proc.h>
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#if NRND > 0
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#include <sys/rnd.h>
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#endif
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#include <sys/bus.h>
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#include <uvm/uvm_extern.h>
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#include <dev/ldvar.h>
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#include <dev/scsipi/scsipi_all.h>
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#include <dev/scsipi/scsipi_disk.h>
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#include <dev/scsipi/scsipiconf.h>
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#include <dev/scsipi/scsi_disk.h>
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#include <dev/pci/pcireg.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/twareg.h>
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#include <dev/pci/twavar.h>
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struct ld_twa_softc {
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struct ld_softc sc_ld;
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int sc_hwunit;
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};
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static void ld_twa_attach(struct device *, struct device *, void *);
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static int ld_twa_detach(struct device *, int);
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static int ld_twa_dobio(struct ld_twa_softc *, void *, size_t, daddr_t,
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struct buf *);
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static int ld_twa_dump(struct ld_softc *, void *, int, int);
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static int ld_twa_flush(struct ld_softc *);
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static void ld_twa_handler(struct twa_request *);
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static int ld_twa_match(struct device *, struct cfdata *, void *);
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static int ld_twa_start(struct ld_softc *, struct buf *);
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static void ld_twa_adjqparam(struct device *, int);
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static int ld_twa_scsicmd(struct ld_twa_softc *,
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struct twa_request *, struct buf *);
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CFATTACH_DECL(ld_twa, sizeof(struct ld_twa_softc),
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ld_twa_match, ld_twa_attach, ld_twa_detach, NULL);
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static const struct twa_callbacks ld_twa_callbacks = {
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ld_twa_adjqparam,
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};
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static int
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ld_twa_match(struct device *parent, struct cfdata *match, void *aux)
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{
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return (1);
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}
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static void
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ld_twa_attach(struct device *parent, struct device *self, void *aux)
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{
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struct twa_attach_args *twa_args;
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struct ld_twa_softc *sc;
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struct ld_softc *ld;
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struct twa_softc *twa;
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sc = (struct ld_twa_softc *)self;
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ld = &sc->sc_ld;
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twa = (struct twa_softc *)parent;
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twa_args = aux;
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twa_register_callbacks(twa, twa_args->twaa_unit, &ld_twa_callbacks);
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sc->sc_hwunit = twa_args->twaa_unit;
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ld->sc_maxxfer = twa_get_maxxfer(twa_get_maxsegs());
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ld->sc_secperunit = twa->sc_units[sc->sc_hwunit].td_size;
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ld->sc_flags = LDF_ENABLED;
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ld->sc_secsize = TWA_SECTOR_SIZE;
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ld->sc_maxqueuecnt = twa->sc_openings;
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ld->sc_start = ld_twa_start;
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ld->sc_dump = ld_twa_dump;
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ld->sc_flush = ld_twa_flush;
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ldattach(ld);
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}
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static int
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ld_twa_detach(struct device *self, int flags)
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{
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int error;
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if ((error = ldbegindetach((struct ld_softc *)self, flags)) != 0)
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return (error);
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ldenddetach((struct ld_softc *)self);
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return (0);
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}
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static int
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ld_twa_dobio(struct ld_twa_softc *sc, void *data, size_t datasize,
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daddr_t blkno, struct buf *bp)
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{
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int rv;
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struct twa_request *tr;
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struct twa_softc *twa;
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twa = (struct twa_softc *)sc->sc_ld.sc_dv.dv_parent;
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if ((tr = twa_get_request(twa, 0)) == NULL) {
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return (EAGAIN);
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}
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if (bp->b_flags & B_READ) {
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tr->tr_flags = TWA_CMD_DATA_OUT;
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} else {
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tr->tr_flags = TWA_CMD_DATA_IN;
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}
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tr->tr_data = data;
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tr->tr_length = datasize;
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tr->tr_cmd_pkt_type =
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(TWA_CMD_PKT_TYPE_9K | TWA_CMD_PKT_TYPE_EXTERNAL);
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tr->tr_command->cmd_hdr.header_desc.size_header = 128;
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tr->tr_command->command.cmd_pkt_9k.command.opcode =
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TWA_OP_EXECUTE_SCSI_COMMAND;
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tr->tr_command->command.cmd_pkt_9k.unit =
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sc->sc_hwunit;
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tr->tr_command->command.cmd_pkt_9k.request_id =
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tr->tr_request_id;
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tr->tr_command->command.cmd_pkt_9k.status = 0;
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tr->tr_command->command.cmd_pkt_9k.sgl_entries = 1;
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tr->tr_command->command.cmd_pkt_9k.sgl_offset = 16;
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/* offset from end of hdr = max cdb len */
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ld_twa_scsicmd(sc, tr, bp);
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tr->tr_callback = ld_twa_handler;
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tr->tr_ld_sc = sc;
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tr->bp = bp;
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rv = twa_map_request(tr);
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return (rv);
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}
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static int
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ld_twa_start(struct ld_softc *ld, struct buf *bp)
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{
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return (ld_twa_dobio((struct ld_twa_softc *)ld, bp->b_data,
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bp->b_bcount, bp->b_rawblkno, bp));
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}
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static void
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ld_twa_handler(struct twa_request *tr)
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{
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uint8_t status;
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struct buf *bp;
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struct ld_twa_softc *sc;
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struct twa_softc *twa;
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bp = tr->bp;
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sc = (struct ld_twa_softc *)tr->tr_ld_sc;
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twa = (struct twa_softc *)sc->sc_ld.sc_dv.dv_parent;
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status = tr->tr_command->command.cmd_pkt_9k.status;
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if (status != 0) {
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bp->b_error = EIO;
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bp->b_resid = bp->b_bcount;
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} else {
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bp->b_resid = 0;
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bp->b_error = 0;
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}
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twa_release_request(tr);
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lddone(&sc->sc_ld, bp);
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}
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static int
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ld_twa_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt)
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{
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#if 0
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/* XXX Unsafe right now. */
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return (ld_twa_dobio((struct ld_twa_softc *)ld, data,
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blkcnt * ld->sc_secsize, blkno, NULL));
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#else
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return EIO;
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#endif
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}
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static int
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ld_twa_flush(struct ld_softc *ld)
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{
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int s, rv = 0;
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struct twa_request *tr;
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struct twa_softc *twa = (void *)ld->sc_dv.dv_parent;
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struct ld_twa_softc *sc = (void *)ld;
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struct twa_command_generic *generic_cmd;
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/* Get a request packet. */
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tr = twa_get_request_wait(twa, 0);
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KASSERT(tr != NULL);
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tr->tr_cmd_pkt_type =
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(TWA_CMD_PKT_TYPE_9K | TWA_CMD_PKT_TYPE_EXTERNAL);
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tr->tr_callback = twa_request_wait_handler;
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tr->tr_ld_sc = sc;
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tr->tr_command->cmd_hdr.header_desc.size_header = 128;
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generic_cmd = &(tr->tr_command->command.cmd_pkt_7k.generic);
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generic_cmd->opcode = TWA_OP_FLUSH;
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generic_cmd->size = 2;
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generic_cmd->unit = sc->sc_hwunit;
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generic_cmd->request_id = tr->tr_request_id;
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generic_cmd->sgl_offset = 0;
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generic_cmd->host_id = 0;
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generic_cmd->status = 0;
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generic_cmd->flags = 0;
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generic_cmd->count = 0;
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rv = twa_map_request(tr);
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s = splbio();
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while (tr->tr_status != TWA_CMD_COMPLETE)
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if ((rv = tsleep(tr, PRIBIO, "twaflush", 60 * hz)) != 0)
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break;
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twa_release_request(tr);
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splx(s);
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return (rv);
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}
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static void
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ld_twa_adjqparam(struct device *self, int openings)
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{
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ldadjqparam((struct ld_softc *)self, openings);
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}
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static int
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ld_twa_scsicmd(struct ld_twa_softc *sc,
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struct twa_request *tr, struct buf *bp)
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{
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if (tr->tr_flags == TWA_CMD_DATA_IN) {
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tr->tr_command->command.cmd_pkt_9k.cdb[0] = WRITE_16;
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} else {
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tr->tr_command->command.cmd_pkt_9k.cdb[0] = READ_16;
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}
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tr->tr_command->command.cmd_pkt_9k.cdb[1] =
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(sc->sc_hwunit << 5); /* lun for CDB */
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_lto8b(htole64(bp->b_rawblkno),
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&tr->tr_command->command.cmd_pkt_9k.cdb[2]);
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_lto4b(htole32((bp->b_bcount / TWA_SECTOR_SIZE)),
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&tr->tr_command->command.cmd_pkt_9k.cdb[10]);
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tr->tr_command->command.cmd_pkt_9k.cdb[14] = 0;
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tr->tr_command->command.cmd_pkt_9k.cdb[15] = 0;
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return (0);
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}
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