mlx_disk.c revision 78752
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 78752 2001-06-25 04:32:31Z 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/kernel.h> 3751973Smsmith 3851973Smsmith#include <sys/bus.h> 3951973Smsmith#include <sys/conf.h> 4051973Smsmith#include <sys/devicestat.h> 4151973Smsmith#include <sys/disk.h> 4251973Smsmith 4351973Smsmith#include <machine/bus.h> 4451973Smsmith#include <sys/rman.h> 4551973Smsmith 4678752Smsmith#include <dev/mlx/mlx_compat.h> 4751973Smsmith#include <dev/mlx/mlxio.h> 4851973Smsmith#include <dev/mlx/mlxvar.h> 4952544Smsmith#include <dev/mlx/mlxreg.h> 5051973Smsmith 5151973Smsmith/* prototypes */ 5251973Smsmithstatic int mlxd_probe(device_t dev); 5351973Smsmithstatic int mlxd_attach(device_t dev); 5451973Smsmithstatic int mlxd_detach(device_t dev); 5551973Smsmith 5651973Smsmithstatic d_open_t mlxd_open; 5751973Smsmithstatic d_close_t mlxd_close; 5851973Smsmithstatic d_strategy_t mlxd_strategy; 5951973Smsmithstatic d_ioctl_t mlxd_ioctl; 6051973Smsmith 6151973Smsmith#define MLXD_CDEV_MAJOR 131 6251973Smsmith 6351973Smsmithstatic struct cdevsw mlxd_cdevsw = { 6451973Smsmith /* open */ mlxd_open, 6551973Smsmith /* close */ mlxd_close, 6651973Smsmith /* read */ physread, 6751973Smsmith /* write */ physwrite, 6851973Smsmith /* ioctl */ mlxd_ioctl, 6951973Smsmith /* poll */ nopoll, 7051973Smsmith /* mmap */ nommap, 7151973Smsmith /* strategy */ mlxd_strategy, 7251973Smsmith /* name */ "mlxd", 7351973Smsmith /* maj */ MLXD_CDEV_MAJOR, 7451973Smsmith /* dump */ nodump, 7551973Smsmith /* psize */ nopsize, 7651973Smsmith /* flags */ D_DISK, 7751973Smsmith}; 7851973Smsmith 7959136Smsmithdevclass_t mlxd_devclass; 8051973Smsmithstatic struct cdevsw mlxddisk_cdevsw; 8151973Smsmith 8251973Smsmithstatic device_method_t mlxd_methods[] = { 8351973Smsmith DEVMETHOD(device_probe, mlxd_probe), 8451973Smsmith DEVMETHOD(device_attach, mlxd_attach), 8551973Smsmith DEVMETHOD(device_detach, mlxd_detach), 8651973Smsmith { 0, 0 } 8751973Smsmith}; 8851973Smsmith 8951973Smsmithstatic driver_t mlxd_driver = { 9051973Smsmith "mlxd", 9151973Smsmith mlxd_methods, 9251973Smsmith sizeof(struct mlxd_softc) 9351973Smsmith}; 9451973Smsmith 9551973SmsmithDRIVER_MODULE(mlxd, mlx, mlxd_driver, mlxd_devclass, 0, 0); 9651973Smsmith 9751973Smsmithstatic int 9851973Smsmithmlxd_open(dev_t dev, int flags, int fmt, struct proc *p) 9951973Smsmith{ 10052225Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 10151973Smsmith struct disklabel *label; 10251973Smsmith 10358188Smsmith debug_called(1); 10451973Smsmith 10551973Smsmith if (sc == NULL) 10651973Smsmith return (ENXIO); 10751973Smsmith 10851973Smsmith /* controller not active? */ 10951973Smsmith if (sc->mlxd_controller->mlx_state & MLX_STATE_SHUTDOWN) 11051973Smsmith return(ENXIO); 11151973Smsmith 11251973Smsmith label = &sc->mlxd_disk.d_label; 11351973Smsmith bzero(label, sizeof(*label)); 11451973Smsmith label->d_type = DTYPE_SCSI; 11551973Smsmith label->d_secsize = MLX_BLKSIZE; 11651973Smsmith label->d_nsectors = sc->mlxd_drive->ms_sectors; 11751973Smsmith label->d_ntracks = sc->mlxd_drive->ms_heads; 11851973Smsmith label->d_ncylinders = sc->mlxd_drive->ms_cylinders; 11951973Smsmith label->d_secpercyl = sc->mlxd_drive->ms_sectors * sc->mlxd_drive->ms_heads; 12051973Smsmith label->d_secperunit = sc->mlxd_drive->ms_size; 12151973Smsmith 12251973Smsmith sc->mlxd_flags |= MLXD_OPEN; 12351973Smsmith return (0); 12451973Smsmith} 12551973Smsmith 12651973Smsmithstatic int 12751973Smsmithmlxd_close(dev_t dev, int flags, int fmt, struct proc *p) 12851973Smsmith{ 12952225Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 13051973Smsmith 13158188Smsmith debug_called(1); 13251973Smsmith 13351973Smsmith if (sc == NULL) 13451973Smsmith return (ENXIO); 13551973Smsmith sc->mlxd_flags &= ~MLXD_OPEN; 13651973Smsmith return (0); 13751973Smsmith} 13851973Smsmith 13951973Smsmithstatic int 14051973Smsmithmlxd_ioctl(dev_t dev, u_long cmd, caddr_t addr, int32_t flag, struct proc *p) 14151973Smsmith{ 14252225Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)dev->si_drv1; 14351973Smsmith int error; 14451973Smsmith 14558188Smsmith debug_called(1); 14651973Smsmith 14751973Smsmith if (sc == NULL) 14851973Smsmith return (ENXIO); 14951973Smsmith 15051973Smsmith if ((error = mlx_submit_ioctl(sc->mlxd_controller, sc->mlxd_drive, cmd, addr, flag, p)) != ENOIOCTL) { 15158188Smsmith debug(0, "mlx_submit_ioctl returned %d\n", error); 15251973Smsmith return(error); 15351973Smsmith } 15451973Smsmith return (ENOTTY); 15551973Smsmith} 15651973Smsmith 15751973Smsmith/* 15851973Smsmith * Read/write routine for a buffer. Finds the proper unit, range checks 15951973Smsmith * arguments, and schedules the transfer. Does not wait for the transfer 16051973Smsmith * to complete. Multi-page transfers are supported. All I/O requests must 16151973Smsmith * be a multiple of a sector in length. 16251973Smsmith */ 16351973Smsmithstatic void 16478752Smsmithmlxd_strategy(mlx_bio *bp) 16551973Smsmith{ 16678752Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)MLX_BIO_SOFTC(bp); 16751973Smsmith 16858188Smsmith debug_called(1); 16951973Smsmith 17051973Smsmith /* bogus disk? */ 17151973Smsmith if (sc == NULL) { 17278752Smsmith MLX_BIO_SET_ERROR(bp, EINVAL); 17351973Smsmith goto bad; 17451973Smsmith } 17551973Smsmith 17651973Smsmith /* XXX may only be temporarily offline - sleep? */ 17751973Smsmith if (sc->mlxd_drive->ms_state == MLX_SYSD_OFFLINE) { 17878752Smsmith MLX_BIO_SET_ERROR(bp, ENXIO); 17951973Smsmith goto bad; 18051973Smsmith } 18151973Smsmith 18278752Smsmith MLX_BIO_STATS_START(bp); 18351973Smsmith mlx_submit_buf(sc->mlxd_controller, bp); 18451973Smsmith return; 18551973Smsmith 18651973Smsmith bad: 18751973Smsmith /* 18878752Smsmith * Correctly set the bio to indicate a failed tranfer. 18951973Smsmith */ 19078752Smsmith MLX_BIO_RESID(bp) = MLX_BIO_LENGTH(bp); 19178752Smsmith MLX_BIO_DONE(bp); 19251973Smsmith return; 19351973Smsmith} 19451973Smsmith 19551973Smsmithvoid 19651973Smsmithmlxd_intr(void *data) 19751973Smsmith{ 19878752Smsmith mlx_bio *bp = (mlx_bio *)data; 19951973Smsmith 20058188Smsmith debug_called(1); 20151973Smsmith 20278752Smsmith if (MLX_BIO_HAS_ERROR(bp)) 20378752Smsmith MLX_BIO_SET_ERROR(bp, EIO); 20451973Smsmith else 20578752Smsmith MLX_BIO_RESID(bp) = 0; 20651973Smsmith 20778752Smsmith MLX_BIO_STATS_END(bp); 20878752Smsmith MLX_BIO_DONE(bp); 20951973Smsmith} 21051973Smsmith 21151973Smsmithstatic int 21251973Smsmithmlxd_probe(device_t dev) 21351973Smsmith{ 21451973Smsmith 21558188Smsmith debug_called(1); 21651973Smsmith 21751973Smsmith device_set_desc(dev, "Mylex System Drive"); 21851973Smsmith return (0); 21951973Smsmith} 22051973Smsmith 22151973Smsmithstatic int 22251973Smsmithmlxd_attach(device_t dev) 22351973Smsmith{ 22451973Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 22551973Smsmith device_t parent; 22651973Smsmith char *state; 22752225Smsmith dev_t dsk; 22860074Smsmith int s1, s2; 22951973Smsmith 23058188Smsmith debug_called(1); 23151973Smsmith 23251973Smsmith parent = device_get_parent(dev); 23351973Smsmith sc->mlxd_controller = (struct mlx_softc *)device_get_softc(parent); 23451973Smsmith sc->mlxd_unit = device_get_unit(dev); 23551973Smsmith sc->mlxd_drive = device_get_ivars(dev); 23652273Smsmith sc->mlxd_dev = dev; 23751973Smsmith 23851973Smsmith switch(sc->mlxd_drive->ms_state) { 23951973Smsmith case MLX_SYSD_ONLINE: 24051973Smsmith state = "online"; 24151973Smsmith break; 24251973Smsmith case MLX_SYSD_CRITICAL: 24351973Smsmith state = "critical"; 24451973Smsmith break; 24551973Smsmith case MLX_SYSD_OFFLINE: 24651973Smsmith state = "offline"; 24751973Smsmith break; 24851973Smsmith default: 24951973Smsmith state = "unknown state"; 25051973Smsmith } 25151973Smsmith 25252785Smsmith device_printf(dev, "%uMB (%u sectors) RAID %d (%s)\n", 25351973Smsmith sc->mlxd_drive->ms_size / ((1024 * 1024) / MLX_BLKSIZE), 25451973Smsmith sc->mlxd_drive->ms_size, sc->mlxd_drive->ms_raidlevel, state); 25551973Smsmith 25651973Smsmith devstat_add_entry(&sc->mlxd_stats, "mlxd", sc->mlxd_unit, MLX_BLKSIZE, 25751973Smsmith DEVSTAT_NO_ORDERED_TAGS, 25854279Sken DEVSTAT_TYPE_STORARRAY | DEVSTAT_TYPE_IF_OTHER, 25954279Sken DEVSTAT_PRIORITY_ARRAY); 26051973Smsmith 26152225Smsmith dsk = disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, &mlxd_cdevsw, &mlxddisk_cdevsw); 26254419Smsmith dsk->si_drv1 = sc; 26359136Smsmith sc->mlxd_dev_t = dsk; 26451973Smsmith 26560074Smsmith /* 26660074Smsmith * Set maximum I/O size to the lesser of the recommended maximum and the practical 26760074Smsmith * maximum. 26860074Smsmith */ 26960074Smsmith s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE; 27060074Smsmith s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * PAGE_SIZE; 27160074Smsmith dsk->si_iosize_max = imin(s1, s2); 27252225Smsmith 27351973Smsmith return (0); 27451973Smsmith} 27551973Smsmith 27651973Smsmithstatic int 27751973Smsmithmlxd_detach(device_t dev) 27851973Smsmith{ 27951973Smsmith struct mlxd_softc *sc = (struct mlxd_softc *)device_get_softc(dev); 28051973Smsmith 28158188Smsmith debug_called(1); 28251973Smsmith 28351973Smsmith devstat_remove_entry(&sc->mlxd_stats); 28459136Smsmith disk_destroy(sc->mlxd_dev_t); 28551973Smsmith 28651973Smsmith return(0); 28751973Smsmith} 28851973Smsmith 289