5b4a781b96
- Introduce the amr_io_lock to control access to command queues, bio queues, and the hardware. - Eliminate the taskqueue and do all completion processing in the ithread. - Assign a static slot number to each command instead of doing a linear search for free slots each time a command is needed. - Modify the interrupt handler to more closely match what Linux does, for safety.
287 lines
8.3 KiB
C
287 lines
8.3 KiB
C
/*-
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* Copyright (c) 1999 Jonathan Lemon
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* Copyright (c) 1999, 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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* All rights reserved.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 2002 Eric Moore
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* Copyright (c) 2002 LSI Logic Corporation
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* All rights reserved.
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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. The party using or redistributing the source code and binary forms
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* agrees to the disclaimer below and the terms and conditions set forth
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* herein.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* Disk driver for AMI MegaRaid controllers
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*/
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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/module.h>
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#include <dev/amr/amr_compat.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <dev/amr/amrio.h>
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#include <dev/amr/amrreg.h>
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#include <dev/amr/amrvar.h>
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#include <dev/amr/amr_tables.h>
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/* prototypes */
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static int amrd_probe(device_t dev);
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static int amrd_attach(device_t dev);
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static int amrd_detach(device_t dev);
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static disk_open_t amrd_open;
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static disk_strategy_t amrd_strategy;
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static devclass_t amrd_devclass;
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#ifdef FREEBSD_4
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static int disks_registered = 0;
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#endif
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static device_method_t amrd_methods[] = {
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DEVMETHOD(device_probe, amrd_probe),
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DEVMETHOD(device_attach, amrd_attach),
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DEVMETHOD(device_detach, amrd_detach),
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{ 0, 0 }
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};
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static driver_t amrd_driver = {
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"amrd",
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amrd_methods,
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sizeof(struct amrd_softc)
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};
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DRIVER_MODULE(amrd, amr, amrd_driver, amrd_devclass, 0, 0);
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static int
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amrd_open(struct disk *dp)
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{
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struct amrd_softc *sc = (struct amrd_softc *)dp->d_drv1;
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#if __FreeBSD_version < 500000 /* old buf style */
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struct disklabel *label;
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#endif
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debug_called(1);
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if (sc == NULL)
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return (ENXIO);
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/* controller not active? */
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if (sc->amrd_controller->amr_state & AMR_STATE_SHUTDOWN)
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return(ENXIO);
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#if __FreeBSD_version < 500000 /* old buf style */
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label = &sc->amrd_disk.d_label;
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bzero(label, sizeof(*label));
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label->d_type = DTYPE_SCSI;
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label->d_secsize = AMR_BLKSIZE;
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label->d_nsectors = sc->amrd_drive->al_sectors;
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label->d_ntracks = sc->amrd_drive->al_heads;
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label->d_ncylinders = sc->amrd_drive->al_cylinders;
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label->d_secpercyl = sc->amrd_drive->al_sectors * sc->amrd_drive->al_heads;
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label->d_secperunit = sc->amrd_drive->al_size;
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#else
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sc->amrd_disk->d_sectorsize = AMR_BLKSIZE;
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sc->amrd_disk->d_mediasize = (off_t)sc->amrd_drive->al_size * AMR_BLKSIZE;
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sc->amrd_disk->d_fwsectors = sc->amrd_drive->al_sectors;
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sc->amrd_disk->d_fwheads = sc->amrd_drive->al_heads;
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#endif
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return (0);
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}
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/********************************************************************************
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* System crashdump support
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*/
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static int
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amrd_dump(void *arg, void *virtual, vm_offset_t physical, off_t offset, size_t length)
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{
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struct amrd_softc *amrd_sc;
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struct amr_softc *amr_sc;
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int error;
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struct disk *dp;
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dp = arg;
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amrd_sc = (struct amrd_softc *)dp->d_drv1;
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if (amrd_sc == NULL)
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return(ENXIO);
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amr_sc = (struct amr_softc *)amrd_sc->amrd_controller;
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if (length > 0) {
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int driveno = amrd_sc->amrd_drive - amr_sc->amr_drive;
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if ((error = amr_dump_blocks(amr_sc,driveno,offset / AMR_BLKSIZE ,(void *)virtual,(int) length / AMR_BLKSIZE )) != 0)
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return(error);
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}
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return(0);
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}
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/*
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* Read/write routine for a buffer. Finds the proper unit, range checks
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* arguments, and schedules the transfer. Does not wait for the transfer
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* to complete. Multi-page transfers are supported. All I/O requests must
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* be a multiple of a sector in length.
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*/
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static void
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amrd_strategy(struct bio *bio)
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{
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struct amrd_softc *sc = (struct amrd_softc *)bio->bio_disk->d_drv1;
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/* bogus disk? */
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if (sc == NULL) {
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bio->bio_error = EINVAL;
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goto bad;
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}
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amr_submit_bio(sc->amrd_controller, bio);
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return;
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bad:
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bio->bio_flags |= BIO_ERROR;
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/*
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* Correctly set the buf to indicate a completed transfer
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*/
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bio->bio_resid = bio->bio_bcount;
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biodone(bio);
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return;
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}
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void
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amrd_intr(void *data)
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{
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struct bio *bio = (struct bio *)data;
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debug_called(2);
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if (bio->bio_flags & BIO_ERROR) {
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bio->bio_error = EIO;
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debug(1, "i/o error\n");
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} else {
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bio->bio_resid = 0;
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}
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AMR_BIO_FINISH(bio);
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}
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static int
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amrd_probe(device_t dev)
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{
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debug_called(1);
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device_set_desc(dev, "LSILogic MegaRAID logical drive");
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return (0);
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}
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static int
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amrd_attach(device_t dev)
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{
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struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev);
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device_t parent;
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debug_called(1);
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parent = device_get_parent(dev);
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sc->amrd_controller = (struct amr_softc *)device_get_softc(parent);
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sc->amrd_unit = device_get_unit(dev);
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sc->amrd_drive = device_get_ivars(dev);
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sc->amrd_dev = dev;
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device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n",
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sc->amrd_drive->al_size / ((1024 * 1024) / AMR_BLKSIZE),
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sc->amrd_drive->al_size, sc->amrd_drive->al_properties & AMR_DRV_RAID_MASK,
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amr_describe_code(amr_table_drvstate, AMR_DRV_CURSTATE(sc->amrd_drive->al_state)));
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sc->amrd_disk = disk_alloc();
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sc->amrd_disk->d_drv1 = sc;
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sc->amrd_disk->d_maxsize = (AMR_NSEG - 1) * PAGE_SIZE;
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sc->amrd_disk->d_open = amrd_open;
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sc->amrd_disk->d_strategy = amrd_strategy;
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sc->amrd_disk->d_name = "amrd";
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sc->amrd_disk->d_dump = (dumper_t *)amrd_dump;
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sc->amrd_disk->d_unit = sc->amrd_unit;
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sc->amrd_disk->d_flags = 0;
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disk_create(sc->amrd_disk, DISK_VERSION);
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#ifdef FREEBSD_4
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disks_registered++;
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#endif
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return (0);
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}
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static int
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amrd_detach(device_t dev)
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{
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struct amrd_softc *sc = (struct amrd_softc *)device_get_softc(dev);
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debug_called(1);
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if (sc->amrd_disk->d_flags & DISKFLAG_OPEN)
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return(EBUSY);
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#ifdef FREEBSD_4
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if (--disks_registered == 0)
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cdevsw_remove(&amrddisk_cdevsw);
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#else
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disk_destroy(sc->amrd_disk);
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#endif
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return(0);
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}
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