mlx_disk.c revision 54979
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 54979 1999-12-22 01:21:28Z 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#if 0 5451973Smsmith#define debug(fmt, args...) printf("%s: " fmt "\n", __FUNCTION__ , ##args) 5551973Smsmith#else 5651973Smsmith#define debug(fmt, args...) 5751973Smsmith#endif 5851973Smsmith 5951973Smsmith/* prototypes */ 6051973Smsmithstatic int mlxd_probe(device_t dev); 6151973Smsmithstatic int mlxd_attach(device_t dev); 6251973Smsmithstatic int mlxd_detach(device_t dev); 6351973Smsmith 6451973Smsmithstatic d_open_t mlxd_open; 6551973Smsmithstatic d_close_t mlxd_close; 6651973Smsmithstatic d_strategy_t mlxd_strategy; 6751973Smsmithstatic d_ioctl_t mlxd_ioctl; 6851973Smsmith 6951973Smsmith#define MLXD_BDEV_MAJOR 27 7051973Smsmith#define MLXD_CDEV_MAJOR 131 7151973Smsmith 7251973Smsmithstatic struct cdevsw mlxd_cdevsw = { 7351973Smsmith /* open */ mlxd_open, 7451973Smsmith /* close */ mlxd_close, 7551973Smsmith /* read */ physread, 7651973Smsmith /* write */ physwrite, 7751973Smsmith /* ioctl */ mlxd_ioctl, 7851973Smsmith /* poll */ nopoll, 7951973Smsmith /* mmap */ nommap, 8051973Smsmith /* strategy */ mlxd_strategy, 8151973Smsmith /* name */ "mlxd", 8251973Smsmith /* maj */ MLXD_CDEV_MAJOR, 8351973Smsmith /* dump */ nodump, 8451973Smsmith /* psize */ nopsize, 8551973Smsmith /* flags */ D_DISK, 8651973Smsmith /* bmaj */ MLXD_BDEV_MAJOR 8751973Smsmith}; 8851973Smsmith 8951973Smsmithstatic devclass_t mlxd_devclass; 9051973Smsmithstatic struct cdevsw mlxddisk_cdevsw; 9151973Smsmithstatic int disks_registered = 0; 9251973Smsmith 9351973Smsmithstatic device_method_t mlxd_methods[] = { 9451973Smsmith DEVMETHOD(device_probe, mlxd_probe), 9551973Smsmith DEVMETHOD(device_attach, mlxd_attach), 9651973Smsmith DEVMETHOD(device_detach, mlxd_detach), 9751973Smsmith { 0, 0 } 9851973Smsmith}; 9951973Smsmith 10051973Smsmithstatic driver_t mlxd_driver = { 10151973Smsmith "mlxd", 10251973Smsmith mlxd_methods, 10351973Smsmith sizeof(struct mlxd_softc) 10451973Smsmith}; 10551973Smsmith 10651973SmsmithDRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0); 10751973Smsmith 10851973Smsmithstatic int 10951973Smsmithmlxd_open(dev_t dev, int flags, int fmt, struct proc *p) 11051973Smsmith{ 11152225Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 11251973Smsmith struct disklabel *label; 11351973Smsmith 11451973Smsmith debug("called"); 11551973Smsmith 11651973Smsmith if (sc == NULL) 11751973Smsmith return (ENXIO); 11851973Smsmith 11951973Smsmith /* controller not active? */ 12051973Smsmith if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN) 12151973Smsmith return(ENXIO); 12251973Smsmith 12351973Smsmith label = &sc->mlxd_disk.d_label; 12451973Smsmith bzero(label, sizeof(*label)); 12551973Smsmith label->d_type = DTYPE_SCSI; 12651973Smsmith label->d_secsize = MLX_BLKSIZE; 12751973Smsmith label->d_nsectors = sc->mlxd_drive->ms_sectors; 12851973Smsmith label->d_ntracks = sc->mlxd_drive->ms_heads; 12951973Smsmith label->d_ncylinders = sc->mlxd_drive->ms_cylinders; 13051973Smsmith label->d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads; 13151973Smsmith label->d_secperunit = sc->mlxd_drive->ms_size; 13251973Smsmith 13351973Smsmith sc->mlxd_flags |= MLXD_OPEN; 13451973Smsmith return (0); 13551973Smsmith} 13651973Smsmith 13751973Smsmithstatic int 13851973Smsmithmlxd_close(dev_t dev, int flags, int fmt, struct proc *p) 13951973Smsmith{ 14052225Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 14151973Smsmith 14251973Smsmith debug("called"); 14351973Smsmith 14451973Smsmith if (sc == NULL) 14551973Smsmith return (ENXIO); 14651973Smsmith sc->mlxd_flags &= ~MLXD_OPEN; 14751973Smsmith return (0); 14851973Smsmith} 14951973Smsmith 15051973Smsmithstatic int 15151973Smsmithmlxd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p) 15251973Smsmith{ 15352225Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 15451973Smsmith int error; 15551973Smsmith 15651973Smsmith debug("called"); 15751973Smsmith 15851973Smsmith if (sc == NULL) 15951973Smsmith return (ENXIO); 16051973Smsmith 16151973Smsmith if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, p)) != ENOIOCTL) { 16251973Smsmith debug("mlx_submit_ioctl returned %d\n", error); 16351973Smsmith return(error); 16451973Smsmith } 16551973Smsmith return (ENOTTY); 16651973Smsmith} 16751973Smsmith 16851973Smsmith/* 16951973Smsmith * Read/write routine for a buffer. Finds the proper unit, range checks 17051973Smsmith * arguments, and schedules the transfer. Does not wait for the transfer 17151973Smsmith * to complete. Multi-page transfers are supported. All I/O requests must 17251973Smsmith * be a multiple of a sector in length. 17351973Smsmith */ 17451973Smsmithstatic void 17551973Smsmithmlxd_strategy(struct buf *bp) 17651973Smsmith{ 17752225Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)bp->b_dev->si_drv1; 17851973Smsmith 17951973Smsmith debug("called"); 18051973Smsmith 18151973Smsmith /* bogus disk? */ 18251973Smsmith if (sc == NULL) { 18351973Smsmith bp->b_error = EINVAL; 18451973Smsmith goto bad; 18551973Smsmith } 18651973Smsmith 18751973Smsmith /* XXX may only be temporarily offline - sleep? */ 18851973Smsmith if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) { 18951973Smsmith bp->b_error = ENXIO; 19051973Smsmith goto bad; 19151973Smsmith } 19251973Smsmith 19351973Smsmith /* do-nothing operation */ 19451973Smsmith if (bp->b_bcount == 0) 19551973Smsmith goto done; 19651973Smsmith 19751973Smsmith devstat_start_transaction(&sc->mlxd_stats); 19851973Smsmith mlx_submit_buf(sc->mlxd_controller, bp); 19951973Smsmith return; 20051973Smsmith 20151973Smsmith bad: 20251973Smsmith bp->b_flags |= B_ERROR; 20351973Smsmith 20451973Smsmith done: 20551973Smsmith /* 20651973Smsmith * Correctly set the buf to indicate a completed transfer 20751973Smsmith */ 20851973Smsmith bp->b_resid = bp->b_bcount; 20951973Smsmith biodone(bp); 21051973Smsmith return; 21151973Smsmith} 21251973Smsmith 21351973Smsmithvoid 21451973Smsmithmlxd_intr(void *data) 21551973Smsmith{ 21651973Smsmith struct buf *bp = (struct buf *)data; 21752225Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)bp->b_dev->si_drv1; 21851973Smsmith 21951973Smsmith debug("called"); 22051973Smsmith 22151973Smsmith if (bp->b_flags & B_ERROR) 22251973Smsmith bp->b_error = EIO; 22351973Smsmith else 22451973Smsmith bp->b_resid = 0; 22551973Smsmith 22651973Smsmith devstat_end_transaction_buf(&sc->mlxd_stats, bp); 22751973Smsmith biodone(bp); 22851973Smsmith} 22951973Smsmith 23051973Smsmithstatic int 23151973Smsmithmlxd_probe(device_t dev) 23251973Smsmith{ 23351973Smsmith 23451973Smsmith debug("called"); 23551973Smsmith 23651973Smsmith device_set_desc(dev, "Mylex System Drive"); 23751973Smsmith return (0); 23851973Smsmith} 23951973Smsmith 24051973Smsmithstatic int 24151973Smsmithmlxd_attach(device_t dev) 24251973Smsmith{ 24351973Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 24451973Smsmith device_t parent; 24551973Smsmith char *state; 24652225Smsmith dev_t dsk; 24751973Smsmith 24851973Smsmith debug("called"); 24951973Smsmith 25051973Smsmith parent = device_get_parent(dev); 25151973Smsmith sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent); 25251973Smsmith sc->mlxd_unit = device_get_unit(dev); 25351973Smsmith sc->mlxd_drive = device_get_ivars(dev); 25452273Smsmith sc->mlxd_dev = dev; 25551973Smsmith 25651973Smsmith switch(sc->mlxd_drive->ms_state) { 25751973Smsmith case MLX_SYSD_ONLINE: 25851973Smsmith state = "online"; 25951973Smsmith break; 26051973Smsmith case MLX_SYSD_CRITICAL: 26151973Smsmith state = "critical"; 26251973Smsmith break; 26351973Smsmith case MLX_SYSD_OFFLINE: 26451973Smsmith state = "offline"; 26551973Smsmith break; 26651973Smsmith default: 26751973Smsmith state = "unknown state"; 26851973Smsmith } 26951973Smsmith 27052785Smsmith device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 27151973Smsmith sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE), 27251973Smsmith sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state); 27351973Smsmith 27451973Smsmith devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE, 27551973Smsmith DEVSTAT_NO_ORDERED_TAGS, 27654279Sken DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 27754279Sken DEVSTAT_PRIORITY_ARRAY); 27851973Smsmith 27952225Smsmith dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_cdevsw, &mlxddisk_cdevsw); 28054419Smsmith dsk->si_drv1 = sc; 28151973Smsmith disks_registered++; 28251973Smsmith 28352225Smsmith /* set maximum I/O size */ 28454979Smsmith dsk->si_iosize_max = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE; 28552225Smsmith 28651973Smsmith return (0); 28751973Smsmith} 28851973Smsmith 28951973Smsmithstatic int 29051973Smsmithmlxd_detach(device_t dev) 29151973Smsmith{ 29251973Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 29351973Smsmith 29451973Smsmith debug("called"); 29551973Smsmith 29651973Smsmith devstat_remove_entry(&sc->mlxd_stats); 29751973Smsmith 29851973Smsmith /* hack to handle lack of destroy_disk() */ 29951973Smsmith if (--disks_registered == 0) 30051973Smsmith cdevsw_remove(&mlxddisk_cdevsw); 30151973Smsmith 30251973Smsmith return(0); 30351973Smsmith} 30451973Smsmith 305