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freebsd/sys/dev/ata/ata-raid.c

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/*-
* Copyright (c) 2000,2001 Søren Schmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#include "opt_global.h"
#include "opt_ata.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ata.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/bio.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/disk.h>
#include <sys/devicestat.h>
#include <sys/cons.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <dev/ata/ata-all.h>
#include <dev/ata/ata-disk.h>
#include <dev/ata/ata-raid.h>
/* device structures */
static d_open_t aropen;
static d_strategy_t arstrategy;
static struct cdevsw ar_cdevsw = {
/* open */ aropen,
/* close */ nullclose,
/* read */ physread,
/* write */ physwrite,
/* ioctl */ noioctl,
/* poll */ nopoll,
/* mmap */ nommap,
/* strategy */ arstrategy,
/* name */ "ar",
/* maj */ 157,
/* dump */ nodump,
/* psize */ nopsize,
/* flags */ D_DISK,
};
static struct cdevsw ardisk_cdevsw;
/* prototypes */
static void ar_attach(struct ar_softc *);
static void ar_done(struct bio *);
static int ar_highpoint_conf(struct ad_softc *, struct ar_softc **);
static int ar_promise_conf(struct ad_softc *, struct ar_softc **);
static int ar_read(struct ad_softc *, u_int32_t, int, char *);
/* internal vars */
static int ar_init = 0;
static struct ar_softc *ar_table[8];
static MALLOC_DEFINE(M_AR, "AR driver", "ATA RAID driver");
int
ar_probe(struct ad_softc *adp)
{
if (!ar_init) {
bzero(&ar_table, sizeof(ar_table));
ar_init = 1;
}
switch(adp->controller->chiptype) {
case 0x4d33105a:
case 0x4d38105a:
case 0x4d30105a:
case 0x0d30105a:
case 0x4d68105a:
case 0x6268105a:
return (ar_promise_conf(adp, ar_table));
case 0x00041103:
return (ar_highpoint_conf(adp, ar_table));
}
return 1;
}
static void
ar_attach(struct ar_softc *raid)
{
dev_t dev;
int i;
printf("ar%d: %luMB <ATA ",
raid->lun, raid->total_secs / ((1024L * 1024L) / DEV_BSIZE));
switch (raid->flags & (AR_F_RAID_0 | AR_F_RAID_1 | AR_F_SPAN)) {
case AR_F_RAID_0:
printf("RAID0 "); break;
case AR_F_RAID_1:
printf("RAID1 "); break;
case AR_F_SPAN:
printf("SPAN "); break;
case (AR_F_RAID_0 | AR_F_RAID_1):
printf("RAID0+1 "); break;
default:
printf("unknown array 0x%x ", raid->flags);
return;
}
printf("array> [%d/%d/%d] subdisks:\n",
raid->cylinders, raid->heads, raid->sectors);
for (i = 0; i < raid->num_subdisks; i++)
ad_print(raid->subdisk[i], " ");
for (i = 0; i < raid->num_mirrordisks; i++)
ad_print(raid->mirrordisk[i], " ");
dev = disk_create(raid->lun, &raid->disk, 0, &ar_cdevsw, &ardisk_cdevsw);
dev->si_drv1 = raid;
dev->si_iosize_max = 256 * DEV_BSIZE;
raid->dev = dev;
}
static int
aropen(dev_t dev, int flags, int fmt, struct proc *p)
{
struct ar_softc *rdp = dev->si_drv1;
struct disklabel *dl;
dl = &rdp->disk.d_label;
bzero(dl, sizeof *dl);
dl->d_secsize = DEV_BSIZE;
dl->d_nsectors = rdp->sectors;
dl->d_ntracks = rdp->heads;
dl->d_ncylinders = rdp->cylinders;
dl->d_secpercyl = rdp->sectors * rdp->heads;
dl->d_secperunit = rdp->total_secs;
return 0;
}
static void
arstrategy(struct bio *bp)
{
struct ar_softc *rdp = bp->bio_dev->si_drv1;
int lba, count, chunk;
caddr_t data;
bp->bio_resid = bp->bio_bcount;
lba = bp->bio_pblkno;
data = bp->bio_data;
for (count = howmany(bp->bio_bcount, DEV_BSIZE); count > 0;
count -= chunk, lba += chunk, data += (chunk * DEV_BSIZE)) {
struct ar_buf *buf1, *buf2;
int plba;
buf1 = malloc(sizeof(struct ar_buf), M_AR, M_NOWAIT | M_ZERO);
if (rdp->flags & AR_F_SPAN) {
plba = lba;
while (plba >= (rdp->subdisk[buf1->drive]->total_secs-rdp->reserved)
&& buf1->drive < rdp->num_subdisks)
plba-=(rdp->subdisk[buf1->drive++]->total_secs-rdp->reserved);
buf1->bp.bio_pblkno = plba;
chunk = min(rdp->subdisk[buf1->drive]->total_secs -
rdp->reserved - plba, count);
}
else if (rdp->flags & AR_F_RAID_0) {
plba = lba / rdp->interleave;
chunk = lba % rdp->interleave;
if (plba == rdp->total_secs / rdp->interleave) {
int lastblksize =
(rdp->total_secs-(plba*rdp->interleave))/rdp->num_subdisks;
buf1->drive = chunk / lastblksize;
buf1->bp.bio_pblkno =
((plba / rdp->num_subdisks) * rdp->interleave) +
chunk % lastblksize;
chunk = min(count, lastblksize);
}
else {
buf1->drive = plba % rdp->num_subdisks;
buf1->bp.bio_pblkno =
((plba / rdp->num_subdisks) * rdp->interleave) + chunk;
chunk = min(count, rdp->interleave - chunk);
}
}
else {
buf1->bp.bio_pblkno = lba;
buf1->drive = 0;
chunk = count;
}
if (buf1->drive > 0)
buf1->bp.bio_pblkno += rdp->offset;
buf1->bp.bio_caller1 = (void *)rdp;
buf1->bp.bio_bcount = chunk * DEV_BSIZE;
buf1->bp.bio_data = data;
buf1->bp.bio_cmd = bp->bio_cmd;
buf1->bp.bio_flags = bp->bio_flags;
buf1->bp.bio_done = ar_done;
buf1->org = bp;
/* simpleminded load balancing on RAID1 arrays */
if (rdp->flags & AR_F_RAID_1 && bp->bio_cmd == BIO_READ) {
if (buf1->bp.bio_pblkno <
(rdp->last_lba[buf1->drive][rdp->last_disk] - 100) ||
buf1->bp.bio_pblkno >
(rdp->last_lba[buf1->drive][rdp->last_disk] + 100)) {
rdp->last_disk = 1 - rdp->last_disk;
rdp->last_lba[buf1->drive][rdp->last_disk] =
buf1->bp.bio_pblkno;
}
if (rdp->last_disk)
buf1->bp.bio_dev = rdp->mirrordisk[buf1->drive]->dev;
else
buf1->bp.bio_dev = rdp->subdisk[buf1->drive]->dev;
}
else
buf1->bp.bio_dev = rdp->subdisk[buf1->drive]->dev;
if (rdp->flags & AR_F_RAID_1 && bp->bio_cmd == BIO_WRITE) {
buf2 = malloc(sizeof(struct ar_buf), M_AR, M_NOWAIT);
bcopy(buf1, buf2, sizeof(struct ar_buf));
buf2->bp.bio_dev = rdp->mirrordisk[buf1->drive]->dev;
buf2->mirror = buf1;
buf1->mirror = buf2;
buf2->bp.bio_dev->si_disk->d_devsw->d_strategy((struct bio *)buf2);
}
buf1->bp.bio_dev->si_disk->d_devsw->d_strategy((struct bio *)buf1);
}
}
static void
ar_done(struct bio *bp)
{
struct ar_softc *rdp = (struct ar_softc *)bp->bio_caller1;
struct ar_buf *buf = (struct ar_buf *)bp;
int s;
s = splbio();
if (bp->bio_flags & BIO_ERROR) {
if (bp->bio_cmd == BIO_WRITE || buf->done || !(rdp->flags&AR_F_RAID_1)){
buf->org->bio_flags |= BIO_ERROR;
buf->org->bio_error = bp->bio_error;
}
printf("ar%d: subdisk error\n", rdp->lun);
}
if (rdp->flags & AR_F_RAID_1) {
if (bp->bio_cmd == BIO_WRITE) {
if (!buf->done) {
buf->mirror->done = 1;
goto done;
}
}
else {
if (!buf->done && bp->bio_flags & BIO_ERROR) {
/* read error on this disk, try mirror */
buf->done = 1;
buf->bp.bio_dev = rdp->mirrordisk[buf->drive]->dev;
buf->bp.bio_dev->si_disk->d_devsw->d_strategy((struct bio*)buf);
return;
}
}
}
buf->org->bio_resid -= bp->bio_bcount;
if (buf->org->bio_resid == 0)
biodone(buf->org);
done:
free(buf, M_AR);
splx(s);
}
/* read the RAID info from a disk on a HighPoint controller */
static int
ar_highpoint_conf(struct ad_softc *adp, struct ar_softc **raidp)
{
struct highpoint_raid_conf info;
struct ar_softc *raid;
int array;
if (ar_read(adp, 0x09, DEV_BSIZE, (char *)&info)) {
if (bootverbose)
printf("HighPoint read conf failed\n");
return 1;
}
/* check if this is a HighPoint RAID struct */
if (info.magic != HPT_MAGIC_OK) {
if (bootverbose)
printf("HighPoint check1 failed\n");
return 1;
}
/* now convert HighPoint config info into our generic form */
for (array = 0; array < 8; array++) {
if (!raidp[array]) {
raidp[array] =
(struct ar_softc*)malloc(sizeof(struct ar_softc),M_AR,
M_NOWAIT | M_ZERO);
if (!raidp[array]) {
printf("ar: failed to allocate raid config storage\n");
return 1;
}
}
raid = raidp[array];
switch (info.type) {
case HPT_T_RAID_0:
/* check the order byte to determine what this really is */
switch (info.order & (HPT_O_MIRROR | HPT_O_STRIPE)) {
case HPT_O_MIRROR:
goto hpt_mirror;
case HPT_O_STRIPE:
if (raid->magic_0 && raid->magic_0 != info.magic_0)
continue;
raid->magic_0 = info.magic_0;
raid->flags |= (AR_F_RAID_0 | AR_F_RAID_1);
raid->interleave = 1 << info.raid0_shift;
raid->subdisk[info.disk_number] = adp;
raid->num_subdisks++;
if ((raid->num_subdisks + raid->num_mirrordisks) ==
(info.raid_disks * 2))
raid->flags |= AR_F_CONF_DONE;
break;
case (HPT_O_MIRROR | HPT_O_STRIPE):
if (raid->magic_1 && raid->magic_1 != info.magic_0)
continue;
raid->magic_1 = info.magic_0;
raid->flags |= (AR_F_RAID_0 | AR_F_RAID_1);
raid->mirrordisk[info.disk_number] = adp;
raid->num_mirrordisks++;
if ((raid->num_subdisks + raid->num_mirrordisks) ==
(info.raid_disks * 2))
raid->flags |= AR_F_CONF_DONE;
break;
default:
if (raid->magic_0 && raid->magic_0 != info.magic_0)
continue;
raid->magic_0 = info.magic_0;
raid->flags |= AR_F_RAID_0;
raid->interleave = 1 << info.raid0_shift;
raid->subdisk[info.disk_number] = adp;
raid->num_subdisks++;
if (raid->num_subdisks == info.raid_disks)
raid->flags |= AR_F_CONF_DONE;
}
break;
case HPT_T_RAID_1:
hpt_mirror:
if (raid->magic_0 && raid->magic_0 != info.magic_0)
continue;
raid->magic_0 = info.magic_0;
raid->flags |= AR_F_RAID_1;
if (info.disk_number == 0 && raid->num_subdisks == 0) {
raid->subdisk[raid->num_subdisks] = adp;
raid->num_subdisks = 1;
}
if (info.disk_number != 0 && raid->num_mirrordisks == 0) {
raid->mirrordisk[raid->num_mirrordisks] = adp;
raid->num_mirrordisks = 1;
}
if ((raid->num_subdisks +
raid->num_mirrordisks) == (info.raid_disks * 2))
raid->flags |= AR_F_CONF_DONE;
break;
case HPT_T_SPAN:
if (raid->magic_0 && raid->magic_0 != info.magic_0)
continue;
raid->magic_0 = info.magic_0;
raid->flags |= AR_F_SPAN;
raid->subdisk[info.disk_number] = adp;
raid->num_subdisks++;
if (raid->num_subdisks == info.raid_disks)
raid->flags |= AR_F_CONF_DONE;
break;
default:
printf("HighPoint unknown RAID type 0x%02x\n", info.type);
}
/* do we have a complete array to attach to ? */
if (raid->flags & AR_F_CONF_DONE) {
raid->lun = array;
raid->heads = 255;
raid->sectors = 63;
raid->cylinders = (info.total_secs - 9) / (63 * 255);
raid->total_secs = info.total_secs - (9 * raid->num_subdisks);
raid->offset = 10;
raid->reserved = 10;
ar_attach(raid);
}
return 0;
}
return 1;
}
/* read the RAID info from a disk on a Promise Fasttrak controller */
static int
ar_promise_conf(struct ad_softc *adp, struct ar_softc **raidp)
{
struct promise_raid_conf info;
struct ar_softc *raid;
u_int32_t lba, magic;
u_int32_t cksum, *ckptr;
int count, disk_number, array;
lba = ((adp->total_secs / (adp->heads * adp->sectors)) *
adp->heads * adp->sectors) - adp->sectors;
if (ar_read(adp, lba, 4 * DEV_BSIZE, (char *)&info)) {
if (bootverbose)
printf("Promise read conf failed\n");
return 1;
}
/* check if this is a Promise RAID struct */
if (strncmp(info.promise_id, PR_MAGIC, sizeof(PR_MAGIC))) {
if (bootverbose)
printf("Promise check1 failed\n");
return 1;
}
/* check if the checksum is OK */
for (cksum = 0, ckptr = (int32_t *)&info, count = 0; count < 511; count++)
cksum += *ckptr++;
if (cksum != *ckptr) {
if (bootverbose)
printf("Promise check2 failed\n");
return 1;
}
/* now convert Promise config info into our generic form */
if ((info.raid.flags != PR_F_CONFED) ||
(((info.raid.status & (PR_S_DEFINED|PR_S_ONLINE)) !=
(PR_S_DEFINED|PR_S_ONLINE)))) {
return 1;
}
magic = (adp->controller->chiptype >> 16) | info.raid.array_number << 16;
array = info.raid.array_number;
if (raidp[array]) {
if (magic != raidp[array]->magic_0)
return 1;
}
else {
if (!(raidp[array] = (struct ar_softc *)
malloc(sizeof(struct ar_softc), M_AR, M_NOWAIT))) {
printf("ar: failed to allocate raid config storage\n");
return 1;
}
else
bzero(raidp[array], sizeof(struct ar_softc));
}
raid = raidp[array];
raid->magic_0 = magic;
switch (info.raid.type) {
case PR_T_STRIPE:
raid->flags |= AR_F_RAID_0;
raid->interleave = 1 << info.raid.raid0_shift;
break;
case PR_T_MIRROR:
raid->flags |= AR_F_RAID_1;
break;
case PR_T_SPAN:
raid->flags |= AR_F_SPAN;
break;
default:
printf("Promise unknown RAID type 0x%02x\n", info.raid.type);
return 1;
}
/* find out where this disk is in the defined array */
disk_number = info.raid.disk_number;
if (disk_number < info.raid.raid0_disks) {
raid->subdisk[disk_number] = adp;
raid->num_subdisks++;
if (raid->num_subdisks > 1 && !(raid->flags & AR_F_SPAN)) {
raid->flags |= AR_F_RAID_0;
raid->interleave = 1 << info.raid.raid0_shift;
}
}
else {
raid->mirrordisk[disk_number - info.raid.raid0_disks] = adp;
raid->num_mirrordisks++;
}
/* do we have a complete array to attach to ? */
if (raid->num_subdisks + raid->num_mirrordisks == info.raid.total_disks) {
raid->flags |= AR_F_CONF_DONE;
raid->lun = array;
raid->heads = info.raid.heads + 1;
raid->sectors = info.raid.sectors;
raid->cylinders = info.raid.cylinders + 1;
raid->total_secs = info.raid.total_secs;
raid->offset = 0;
raid->reserved = 63;
ar_attach(raid);
}
return 0;
}
int
ar_read(struct ad_softc *adp, u_int32_t lba, int count, char *data)
{
if (ata_command(adp->controller, adp->unit | ATA_D_LBA,
(count > DEV_BSIZE) ? ATA_C_READ_MUL : ATA_C_READ,
(lba >> 8) & 0xffff, (lba >> 24) & 0xff, lba & 0xff,
count / DEV_BSIZE, 0, ATA_WAIT_INTR)) {
ata_printf(adp->controller, adp->unit, "RAID read config failed\n");
return 1;
}
if (ata_wait(adp->controller, adp->unit, ATA_S_READY|ATA_S_DSC|ATA_S_DRQ)) {
ata_printf(adp->controller, adp->unit, "RAID read config timeout\n");
return 1;
}
ATA_INSW(adp->controller->r_io, ATA_DATA, (int16_t *)data,
count/sizeof(int16_t));
ATA_INB(adp->controller->r_io, ATA_STATUS);
return 0;
}
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