mlx_disk.c revision 59136
151973Smsmith/*- 251973Smsmith * Copyright (c) 1999 Jonathan Lemon 351973Smsmith * Copyright (c) 1999 Michael Smith 451973Smsmith * All rights reserved. 551973Smsmith * 651973Smsmith * Redistribution and use in source and binary forms, with or without 751973Smsmith * modification, are permitted provided that the following conditions 851973Smsmith * are met: 951973Smsmith * 1. Redistributions of source code must retain the above copyright 1051973Smsmith * notice, this list of conditions and the following disclaimer. 1151973Smsmith * 2. Redistributions in binary form must reproduce the above copyright 1251973Smsmith * notice, this list of conditions and the following disclaimer in the 1351973Smsmith * documentation and/or other materials provided with the distribution. 1451973Smsmith * 1551973Smsmith * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1651973Smsmith * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1751973Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1851973Smsmith * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1951973Smsmith * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2051973Smsmith * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2151973Smsmith * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2251973Smsmith * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2351973Smsmith * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2451973Smsmith * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2551973Smsmith * SUCH DAMAGE. 2651973Smsmith * 2751973Smsmith * $FreeBSD: head/sys/dev/mlx/mlx_disk.c 59136 2000-04-11 02:52:46Z msmith $ 2851973Smsmith */ 2951973Smsmith 3051973Smsmith/* 3151973Smsmith * Disk driver for Mylex DAC960 RAID adapters. 3251973Smsmith */ 3351973Smsmith 3451973Smsmith#include <sys/param.h> 3551973Smsmith#include <sys/systm.h> 3651973Smsmith#include <sys/malloc.h> 3751973Smsmith#include <sys/kernel.h> 3851973Smsmith 3951973Smsmith#include <sys/buf.h> 4051973Smsmith#include <sys/bus.h> 4151973Smsmith#include <sys/conf.h> 4251973Smsmith#include <sys/devicestat.h> 4351973Smsmith#include <sys/disk.h> 4451973Smsmith 4551973Smsmith#include <machine/bus.h> 4651973Smsmith#include <machine/clock.h> 4751973Smsmith#include <sys/rman.h> 4851973Smsmith 4951973Smsmith#include <dev/mlx/mlxio.h> 5051973Smsmith#include <dev/mlx/mlxvar.h> 5152544Smsmith#include <dev/mlx/mlxreg.h> 5251973Smsmith 5351973Smsmith/* prototypes */ 5451973Smsmithstatic int mlxd_probe(device_t dev); 5551973Smsmithstatic int mlxd_attach(device_t dev); 5651973Smsmithstatic int mlxd_detach(device_t dev); 5751973Smsmith 5851973Smsmithstatic d_open_t mlxd_open; 5951973Smsmithstatic d_close_t mlxd_close; 6051973Smsmithstatic d_strategy_t mlxd_strategy; 6151973Smsmithstatic d_ioctl_t mlxd_ioctl; 6251973Smsmith 6351973Smsmith#define MLXD_BDEV_MAJOR 27 6451973Smsmith#define MLXD_CDEV_MAJOR 131 6551973Smsmith 6651973Smsmithstatic struct cdevsw mlxd_cdevsw = { 6751973Smsmith /* open */ mlxd_open, 6851973Smsmith /* close */ mlxd_close, 6951973Smsmith /* read */ physread, 7051973Smsmith /* write */ physwrite, 7151973Smsmith /* ioctl */ mlxd_ioctl, 7251973Smsmith /* poll */ nopoll, 7351973Smsmith /* mmap */ nommap, 7451973Smsmith /* strategy */ mlxd_strategy, 7551973Smsmith /* name */ "mlxd", 7651973Smsmith /* maj */ MLXD_CDEV_MAJOR, 7751973Smsmith /* dump */ nodump, 7851973Smsmith /* psize */ nopsize, 7951973Smsmith /* flags */ D_DISK, 8051973Smsmith /* bmaj */ MLXD_BDEV_MAJOR 8151973Smsmith}; 8251973Smsmith 8359136Smsmithdevclass_t mlxd_devclass; 8451973Smsmithstatic struct cdevsw mlxddisk_cdevsw; 8551973Smsmith 8651973Smsmithstatic device_method_t mlxd_methods[] = { 8751973Smsmith DEVMETHOD(device_probe, mlxd_probe), 8851973Smsmith DEVMETHOD(device_attach, mlxd_attach), 8951973Smsmith DEVMETHOD(device_detach, mlxd_detach), 9051973Smsmith { 0, 0 } 9151973Smsmith}; 9251973Smsmith 9351973Smsmithstatic driver_t mlxd_driver = { 9451973Smsmith "mlxd", 9551973Smsmith mlxd_methods, 9651973Smsmith sizeof(struct mlxd_softc) 9751973Smsmith}; 9851973Smsmith 9951973SmsmithDRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0); 10051973Smsmith 10151973Smsmithstatic int 10251973Smsmithmlxd_open(dev_t dev, int flags, int fmt, struct proc *p) 10351973Smsmith{ 10452225Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 10551973Smsmith struct disklabel *label; 10651973Smsmith 10758188Smsmith debug_called(1); 10851973Smsmith 10951973Smsmith if (sc == NULL) 11051973Smsmith return (ENXIO); 11151973Smsmith 11251973Smsmith /* controller not active? */ 11351973Smsmith if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN) 11451973Smsmith return(ENXIO); 11551973Smsmith 11651973Smsmith label = &sc->mlxd_disk.d_label; 11751973Smsmith bzero(label, sizeof(*label)); 11851973Smsmith label->d_type = DTYPE_SCSI; 11951973Smsmith label->d_secsize = MLX_BLKSIZE; 12051973Smsmith label->d_nsectors = sc->mlxd_drive->ms_sectors; 12151973Smsmith label->d_ntracks = sc->mlxd_drive->ms_heads; 12251973Smsmith label->d_ncylinders = sc->mlxd_drive->ms_cylinders; 12351973Smsmith label->d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads; 12451973Smsmith label->d_secperunit = sc->mlxd_drive->ms_size; 12551973Smsmith 12651973Smsmith sc->mlxd_flags |= MLXD_OPEN; 12751973Smsmith return (0); 12851973Smsmith} 12951973Smsmith 13051973Smsmithstatic int 13151973Smsmithmlxd_close(dev_t dev, int flags, int fmt, struct proc *p) 13251973Smsmith{ 13352225Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 13451973Smsmith 13558188Smsmith debug_called(1); 13651973Smsmith 13751973Smsmith if (sc == NULL) 13851973Smsmith return (ENXIO); 13951973Smsmith sc->mlxd_flags &= ~MLXD_OPEN; 14051973Smsmith return (0); 14151973Smsmith} 14251973Smsmith 14351973Smsmithstatic int 14451973Smsmithmlxd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p) 14551973Smsmith{ 14652225Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 14751973Smsmith int error; 14851973Smsmith 14958188Smsmith debug_called(1); 15051973Smsmith 15151973Smsmith if (sc == NULL) 15251973Smsmith return (ENXIO); 15351973Smsmith 15451973Smsmith if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, p)) != ENOIOCTL) { 15558188Smsmith debug(0, "mlx_submit_ioctl returned %d\n", error); 15651973Smsmith return(error); 15751973Smsmith } 15851973Smsmith return (ENOTTY); 15951973Smsmith} 16051973Smsmith 16151973Smsmith/* 16251973Smsmith * Read/write routine for a buffer. Finds the proper unit, range checks 16351973Smsmith * arguments, and schedules the transfer. Does not wait for the transfer 16451973Smsmith * to complete. Multi-page transfers are supported. All I/O requests must 16551973Smsmith * be a multiple of a sector in length. 16651973Smsmith */ 16751973Smsmithstatic void 16851973Smsmithmlxd_strategy(struct buf *bp) 16951973Smsmith{ 17052225Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)bp->b_dev->si_drv1; 17151973Smsmith 17258188Smsmith debug_called(1); 17351973Smsmith 17451973Smsmith /* bogus disk? */ 17551973Smsmith if (sc == NULL) { 17651973Smsmith bp->b_error = EINVAL; 17751973Smsmith goto bad; 17851973Smsmith } 17951973Smsmith 18051973Smsmith /* XXX may only be temporarily offline - sleep? */ 18151973Smsmith if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) { 18251973Smsmith bp->b_error = ENXIO; 18351973Smsmith goto bad; 18451973Smsmith } 18551973Smsmith 18651973Smsmith /* do-nothing operation */ 18751973Smsmith if (bp->b_bcount == 0) 18851973Smsmith goto done; 18951973Smsmith 19051973Smsmith devstat_start_transaction(&sc->mlxd_stats); 19151973Smsmith mlx_submit_buf(sc->mlxd_controller, bp); 19251973Smsmith return; 19351973Smsmith 19451973Smsmith bad: 19558934Sphk bp->b_ioflags |= BIO_ERROR; 19651973Smsmith 19751973Smsmith done: 19851973Smsmith /* 19951973Smsmith * Correctly set the buf to indicate a completed transfer 20051973Smsmith */ 20151973Smsmith bp->b_resid = bp->b_bcount; 20251973Smsmith biodone(bp); 20351973Smsmith return; 20451973Smsmith} 20551973Smsmith 20651973Smsmithvoid 20751973Smsmithmlxd_intr(void *data) 20851973Smsmith{ 20951973Smsmith struct buf *bp = (struct buf *)data; 21052225Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)bp->b_dev->si_drv1; 21151973Smsmith 21258188Smsmith debug_called(1); 21351973Smsmith 21458934Sphk if (bp->b_ioflags & BIO_ERROR) 21551973Smsmith bp->b_error = EIO; 21651973Smsmith else 21751973Smsmith bp->b_resid = 0; 21851973Smsmith 21951973Smsmith devstat_end_transaction_buf(&sc->mlxd_stats, bp); 22051973Smsmith biodone(bp); 22151973Smsmith} 22251973Smsmith 22351973Smsmithstatic int 22451973Smsmithmlxd_probe(device_t dev) 22551973Smsmith{ 22651973Smsmith 22758188Smsmith debug_called(1); 22851973Smsmith 22951973Smsmith device_set_desc(dev, "Mylex System Drive"); 23051973Smsmith return (0); 23151973Smsmith} 23251973Smsmith 23351973Smsmithstatic int 23451973Smsmithmlxd_attach(device_t dev) 23551973Smsmith{ 23651973Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 23751973Smsmith device_t parent; 23851973Smsmith char *state; 23952225Smsmith dev_t dsk; 24051973Smsmith 24158188Smsmith debug_called(1); 24251973Smsmith 24351973Smsmith parent = device_get_parent(dev); 24451973Smsmith sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent); 24551973Smsmith sc->mlxd_unit = device_get_unit(dev); 24651973Smsmith sc->mlxd_drive = device_get_ivars(dev); 24752273Smsmith sc->mlxd_dev = dev; 24851973Smsmith 24951973Smsmith switch(sc->mlxd_drive->ms_state) { 25051973Smsmith case MLX_SYSD_ONLINE: 25151973Smsmith state = "online"; 25251973Smsmith break; 25351973Smsmith case MLX_SYSD_CRITICAL: 25451973Smsmith state = "critical"; 25551973Smsmith break; 25651973Smsmith case MLX_SYSD_OFFLINE: 25751973Smsmith state = "offline"; 25851973Smsmith break; 25951973Smsmith default: 26051973Smsmith state = "unknown state"; 26151973Smsmith } 26251973Smsmith 26352785Smsmith device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 26451973Smsmith sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE), 26551973Smsmith sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state); 26651973Smsmith 26751973Smsmith devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE, 26851973Smsmith DEVSTAT_NO_ORDERED_TAGS, 26954279Sken DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 27054279Sken DEVSTAT_PRIORITY_ARRAY); 27151973Smsmith 27252225Smsmith dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_cdevsw, &mlxddisk_cdevsw); 27354419Smsmith dsk->si_drv1 = sc; 27459136Smsmith sc->mlxd_dev_t = dsk; 27551973Smsmith 27652225Smsmith /* set maximum I/O size */ 27754979Smsmith dsk->si_iosize_max = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE; 27852225Smsmith 27951973Smsmith return (0); 28051973Smsmith} 28151973Smsmith 28251973Smsmithstatic int 28351973Smsmithmlxd_detach(device_t dev) 28451973Smsmith{ 28551973Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 28651973Smsmith 28758188Smsmith debug_called(1); 28851973Smsmith 28951973Smsmith devstat_remove_entry(&sc->mlxd_stats); 29059136Smsmith disk_destroy(sc->mlxd_dev_t); 29151973Smsmith 29251973Smsmith return(0); 29351973Smsmith} 29451973Smsmith 295