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Commit 50580f89 authored by Alexander Viro's avatar Alexander Viro Committed by Linus Torvalds
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[PATCH] gendisk for pf.c 

pf switched to use of gendisk and cleaned up - we pass pointers to structures
instead of minors now.
parent 43130446
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Showing with 271 additions and 333 deletions
drivers/block/paride/pf.c
View file @ 50580f89
......@@ -139,15 +139,7 @@ static int drive3[7] = { 0, 0, 0, -1, -1, -1, -1 };
static int (*drives[4])[7] = {&drive0, &drive1, &drive2, &drive3};
static int pf_drive_count;
#define D_PRT 0
#define D_PRO 1
#define D_UNI 2
#define D_MOD 3
#define D_SLV 4
#define D_LUN 5
#define D_DLY 6
#define DU (*drives[unit])
enum {D_PRT, D_PRO, D_UNI, D_MOD, D_SLV, D_LUN, D_DLY};
/* end of parameters */
......@@ -256,11 +248,6 @@ static void do_pf_write_start(void);
static void do_pf_read_drq(void);
static void do_pf_write_done(void);
static int pf_identify(int unit);
static void pf_lock(int unit, int func);
static void pf_eject(int unit);
static int pf_check_media(kdev_t dev);
#define PF_NM 0
#define PF_RO 1
#define PF_RW 2
......@@ -275,17 +262,17 @@ struct pf_unit {
int drive; /* drive */
int lun;
int access; /* count of active opens ... */
int capacity; /* Size of this volume in sectors */
int present; /* device present ? */
char name[PF_NAMELEN]; /* pf0, pf1, ... */
struct gendisk disk;
};
struct pf_unit pf[PF_UNITS];
struct pf_unit units[PF_UNITS];
/* 'unit' must be defined in all functions - either as a local or a param */
#define PF pf[unit]
#define PI PF.pi
static int pf_identify(struct pf_unit *pf);
static void pf_lock(struct pf_unit *pf, int func);
static void pf_eject(struct pf_unit *pf);
static int pf_check_media(kdev_t dev);
static char pf_scratch[512]; /* scratch block buffer */
......@@ -295,43 +282,44 @@ static char pf_scratch[512]; /* scratch block buffer */
static int pf_retries = 0; /* i/o error retry count */
static int pf_busy = 0; /* request being processed ? */
static struct request *pf_req; /* current request */
static int pf_block; /* address of next requested block */
static int pf_count; /* number of blocks still to do */
static int pf_run; /* sectors in current cluster */
static int pf_cmd; /* current command READ/WRITE */
static int pf_unit; /* unit of current request */
static struct pf_unit *pf_current;/* unit of current request */
static int pf_mask; /* stopper for pseudo-int */
static char *pf_buf; /* buffer for request in progress */
/* kernel glue structures */
static struct block_device_operations pf_fops = {
owner:THIS_MODULE,
open:pf_open,
release:pf_release,
ioctl:pf_ioctl,
check_media_change:pf_check_media,
.owner = THIS_MODULE,
.open = pf_open,
.release = pf_release,
.ioctl = pf_ioctl,
.check_media_change = pf_check_media,
};
void pf_init_units(void)
{
int unit, j;
struct pf_unit *pf;
int unit;
pf_drive_count = 0;
for (unit = 0; unit < PF_UNITS; unit++) {
PF.pi = &PF.pia;
PF.access = 0;
PF.media_status = PF_NM;
PF.capacity = 0;
PF.present = 0;
PF.drive = DU[D_SLV];
PF.lun = DU[D_LUN];
j = 0;
while ((j < PF_NAMELEN - 2) && (PF.name[j] = name[j]))
j++;
PF.name[j++] = '0' + unit;
PF.name[j] = 0;
if (DU[D_PRT])
for (unit = 0, pf = units; unit < PF_UNITS; unit++, pf++) {
struct gendisk *disk = &pf->disk;
pf->pi = &pf->pia;
pf->media_status = PF_NM;
pf->drive = (*drives[unit])[D_SLV];
pf->lun = (*drives[unit])[D_LUN];
snprintf(pf->name, PF_NAMELEN, "%s%d", name, unit);
disk->major = MAJOR_NR;
disk->first_minor = unit;
disk->major_name = pf->name;
disk->minor_shift = 0;
disk->fops = &pf_fops;
if (!(*drives[unit])[D_PRT])
pf_drive_count++;
}
}
......@@ -339,87 +327,75 @@ void pf_init_units(void)
static int pf_open(struct inode *inode, struct file *file)
{
int unit = DEVICE_NR(inode->i_rdev);
struct pf_unit *pf = units + unit;
if ((unit >= PF_UNITS) || (!PF.present))
if ((unit >= PF_UNITS) || (!pf->present))
return -ENODEV;
pf_identify(unit);
pf_identify(pf);
if (PF.media_status == PF_NM)
if (pf->media_status == PF_NM)
return -ENODEV;
if ((PF.media_status == PF_RO) && (file->f_mode & 2))
if ((pf->media_status == PF_RO) && (file->f_mode & 2))
return -EROFS;
PF.access++;
if (PF.removable)
pf_lock(unit, 1);
pf->access++;
if (pf->removable)
pf_lock(pf, 1);
return 0;
}
static int pf_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
int err, unit;
int unit = DEVICE_NR(inode->i_rdev);
struct hd_geometry *geo = (struct hd_geometry *) arg;
struct hd_geometry g;
struct pf_unit *pf = units + unit;
sector_t capacity;
if ((!inode) || kdev_none(inode->i_rdev))
return -EINVAL;
unit = DEVICE_NR(inode->i_rdev);
if (unit >= PF_UNITS)
return -EINVAL;
if (!PF.present)
if (!pf->present)
return -ENODEV;
switch (cmd) {
case CDROMEJECT:
if (PF.access == 1) {
pf_eject(unit);
if (cmd == CDROMEJECT) {
if (pf->access == 1) {
pf_eject(pf);
return 0;
}
case HDIO_GETGEO:
if (!geo)
return -EBUSY;
}
if (cmd != HDIO_GETGEO)
return -EINVAL;
err = verify_area(VERIFY_WRITE, geo, sizeof (*geo));
if (err)
return err;
if (PF.capacity < PF_FD_MAX) {
put_user(PF.capacity / (PF_FD_HDS * PF_FD_SPT),
(short *) &geo->cylinders);
put_user(PF_FD_HDS, (char *) &geo->heads);
put_user(PF_FD_SPT, (char *) &geo->sectors);
capacity = get_capacity(&pf->disk);
if (capacity < PF_FD_MAX) {
g.cylinders = capacity / (PF_FD_HDS * PF_FD_SPT);
g.heads = PF_FD_HDS;
g.sectors = PF_FD_SPT;
} else {
put_user(PF.capacity / (PF_HD_HDS * PF_HD_SPT),
(short *) &geo->cylinders);
put_user(PF_HD_HDS, (char *) &geo->heads);
put_user(PF_HD_SPT, (char *) &geo->sectors);
g.cylinders = capacity / (PF_HD_HDS * PF_HD_SPT);
g.heads = PF_HD_HDS;
g.sectors = PF_HD_SPT;
}
put_user(0, (long *) &geo->start);
if (copy_to_user(geo, &g, sizeof(g)))
return -EFAULT;
return 0;
case BLKGETSIZE:
return put_user(PF.capacity, (long *) arg);
case BLKGETSIZE64:
return put_user((u64) PF.capacity << 9, (u64 *) arg);
default:
return -EINVAL;
}
}
static int pf_release(struct inode *inode, struct file *file)
{
kdev_t devp;
int unit;
devp = inode->i_rdev;
unit = DEVICE_NR(devp);
int unit = DEVICE_NR(inode->i_rdev);
struct pf_unit *pf = units + unit;
if ((unit >= PF_UNITS) || (PF.access <= 0))
if ((unit >= PF_UNITS) || (pf->access <= 0))
return -EINVAL;
PF.access--;
pf->access--;
if (!PF.access && PF.removable)
pf_lock(unit, 0);
if (!pf->access && pf->removable)
pf_lock(pf, 0);
return 0;
......@@ -430,145 +406,142 @@ static int pf_check_media(kdev_t dev)
return 1;
}
static inline int status_reg(int unit)
static inline int status_reg(struct pf_unit *pf)
{
return pi_read_regr(PI, 1, 6);
return pi_read_regr(pf->pi, 1, 6);
}
static inline int read_reg(int unit, int reg)
static inline int read_reg(struct pf_unit *pf, int reg)
{
return pi_read_regr(PI, 0, reg);
return pi_read_regr(pf->pi, 0, reg);
}
static inline void write_reg(int unit, int reg, int val)
static inline void write_reg(struct pf_unit *pf, int reg, int val)
{
pi_write_regr(PI, 0, reg, val);
pi_write_regr(pf->pi, 0, reg, val);
}
#define LUN (0x20*PF.lun)
#define DRIVE (0xa0+0x10*PF.drive)
static int pf_wait(int unit, int go, int stop, char *fun, char *msg)
static int pf_wait(struct pf_unit *pf, int go, int stop, char *fun, char *msg)
{
int j, r, e, s, p;
j = 0;
while ((((r = status_reg(unit)) & go) || (stop && (!(r & stop))))
while ((((r = status_reg(pf)) & go) || (stop && (!(r & stop))))
&& (j++ < PF_SPIN))
udelay(PF_SPIN_DEL);
if ((r & (STAT_ERR & stop)) || (j >= PF_SPIN)) {
s = read_reg(unit, 7);
e = read_reg(unit, 1);
p = read_reg(unit, 2);
s = read_reg(pf, 7);
e = read_reg(pf, 1);
p = read_reg(pf, 2);
if (j >= PF_SPIN)
e |= 0x100;
if (fun)
printk("%s: %s %s: alt=0x%x stat=0x%x err=0x%x"
" loop=%d phase=%d\n",
PF.name, fun, msg, r, s, e, j, p);
pf->name, fun, msg, r, s, e, j, p);
return (e << 8) + s;
}
return 0;
}
static int pf_command(int unit, char *cmd, int dlen, char *fun)
static int pf_command(struct pf_unit *pf, char *cmd, int dlen, char *fun)
{
pi_connect(PI);
pi_connect(pf->pi);
write_reg(unit, 6, DRIVE);
write_reg(pf, 6, 0xa0+0x10*pf->drive);
if (pf_wait(unit, STAT_BUSY | STAT_DRQ, 0, fun, "before command")) {
pi_disconnect(PI);
if (pf_wait(pf, STAT_BUSY | STAT_DRQ, 0, fun, "before command")) {
pi_disconnect(pf->pi);
return -1;
}
write_reg(unit, 4, dlen % 256);
write_reg(unit, 5, dlen / 256);
write_reg(unit, 7, 0xa0); /* ATAPI packet command */
write_reg(pf, 4, dlen % 256);
write_reg(pf, 5, dlen / 256);
write_reg(pf, 7, 0xa0); /* ATAPI packet command */
if (pf_wait(unit, STAT_BUSY, STAT_DRQ, fun, "command DRQ")) {
pi_disconnect(PI);
if (pf_wait(pf, STAT_BUSY, STAT_DRQ, fun, "command DRQ")) {
pi_disconnect(pf->pi);
return -1;
}
if (read_reg(unit, 2) != 1) {
printk("%s: %s: command phase error\n", PF.name, fun);
pi_disconnect(PI);
if (read_reg(pf, 2) != 1) {
printk("%s: %s: command phase error\n", pf->name, fun);
pi_disconnect(pf->pi);
return -1;
}
pi_write_block(PI, cmd, 12);
pi_write_block(pf->pi, cmd, 12);
return 0;
}
static int pf_completion(int unit, char *buf, char *fun)
static int pf_completion(struct pf_unit *pf, char *buf, char *fun)
{
int r, s, n;
r = pf_wait(unit, STAT_BUSY, STAT_DRQ | STAT_READY | STAT_ERR,
r = pf_wait(pf, STAT_BUSY, STAT_DRQ | STAT_READY | STAT_ERR,
fun, "completion");
if ((read_reg(unit, 2) & 2) && (read_reg(unit, 7) & STAT_DRQ)) {
n = (((read_reg(unit, 4) + 256 * read_reg(unit, 5)) +
if ((read_reg(pf, 2) & 2) && (read_reg(pf, 7) & STAT_DRQ)) {
n = (((read_reg(pf, 4) + 256 * read_reg(pf, 5)) +
3) & 0xfffc);
pi_read_block(PI, buf, n);
pi_read_block(pf->pi, buf, n);
}
s = pf_wait(unit, STAT_BUSY, STAT_READY | STAT_ERR, fun, "data done");
s = pf_wait(pf, STAT_BUSY, STAT_READY | STAT_ERR, fun, "data done");
pi_disconnect(PI);
pi_disconnect(pf->pi);
return (r ? r : s);
}
static void pf_req_sense(int unit, int quiet)
static void pf_req_sense(struct pf_unit *pf, int quiet)
{
char rs_cmd[12] =
{ ATAPI_REQ_SENSE, LUN, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 };
{ ATAPI_REQ_SENSE, pf->lun << 5, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 };
char buf[16];
int r;
r = pf_command(unit, rs_cmd, 16, "Request sense");
r = pf_command(pf, rs_cmd, 16, "Request sense");
mdelay(1);
if (!r)
pf_completion(unit, buf, "Request sense");
pf_completion(pf, buf, "Request sense");
if ((!r) && (!quiet))
printk("%s: Sense key: %x, ASC: %x, ASQ: %x\n",
PF.name, buf[2] & 0xf, buf[12], buf[13]);
pf->name, buf[2] & 0xf, buf[12], buf[13]);
}
static int pf_atapi(int unit, char *cmd, int dlen, char *buf, char *fun)
static int pf_atapi(struct pf_unit *pf, char *cmd, int dlen, char *buf, char *fun)
{
int r;
r = pf_command(unit, cmd, dlen, fun);
r = pf_command(pf, cmd, dlen, fun);
mdelay(1);
if (!r)
r = pf_completion(unit, buf, fun);
r = pf_completion(pf, buf, fun);
if (r)
pf_req_sense(unit, !fun);
pf_req_sense(pf, !fun);
return r;
}
#define DBMSG(msg) ((verbose>1)?(msg):NULL)
static void pf_lock(int unit, int func)
static void pf_lock(struct pf_unit *pf, int func)
{
char lo_cmd[12] = { ATAPI_LOCK, LUN, 0, 0, func, 0, 0, 0, 0, 0, 0, 0 };
char lo_cmd[12] = { ATAPI_LOCK, pf->lun << 5, 0, 0, func, 0, 0, 0, 0, 0, 0, 0 };
pf_atapi(unit, lo_cmd, 0, pf_scratch, func ? "unlock" : "lock");
pf_atapi(pf, lo_cmd, 0, pf_scratch, func ? "unlock" : "lock");
}
static void pf_eject(int unit)
static void pf_eject(struct pf_unit *pf)
{
char ej_cmd[12] = { ATAPI_DOOR, LUN, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0 };
char ej_cmd[12] = { ATAPI_DOOR, pf->lun << 5, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0 };
pf_lock(unit, 0);
pf_atapi(unit, ej_cmd, 0, pf_scratch, "eject");
pf_lock(pf, 0);
pf_atapi(pf, ej_cmd, 0, pf_scratch, "eject");
}
#define PF_RESET_TMO 30 /* in tenths of a second */
......@@ -584,48 +557,48 @@ static void pf_sleep(int cs)
two bytes, and different drives interpret the standard differently.
*/
static int pf_reset(int unit)
static int pf_reset(struct pf_unit *pf)
{
int i, k, flg;
int expect[5] = { 1, 1, 1, 0x14, 0xeb };
pi_connect(PI);
write_reg(unit, 6, DRIVE);
write_reg(unit, 7, 8);
pi_connect(pf->pi);
write_reg(pf, 6, 0xa0+0x10*pf->drive);
write_reg(pf, 7, 8);
pf_sleep(20 * HZ / 1000);
k = 0;
while ((k++ < PF_RESET_TMO) && (status_reg(unit) & STAT_BUSY))
while ((k++ < PF_RESET_TMO) && (status_reg(pf) & STAT_BUSY))
pf_sleep(HZ / 10);
flg = 1;
for (i = 0; i < 5; i++)
flg &= (read_reg(unit, i + 1) == expect[i]);
flg &= (read_reg(pf, i + 1) == expect[i]);
if (verbose) {
printk("%s: Reset (%d) signature = ", PF.name, k);
printk("%s: Reset (%d) signature = ", pf->name, k);
for (i = 0; i < 5; i++)
printk("%3x", read_reg(unit, i + 1));
printk("%3x", read_reg(pf, i + 1));
if (!flg)
printk(" (incorrect)");
printk("\n");
}
pi_disconnect(PI);
pi_disconnect(pf->pi);
return flg - 1;
}
static void pf_mode_sense(int unit)
static void pf_mode_sense(struct pf_unit *pf)
{
char ms_cmd[12] =
{ ATAPI_MODE_SENSE, LUN, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0 };
{ ATAPI_MODE_SENSE, pf->lun << 5, 0, 0, 0, 0, 0, 0, 8, 0, 0, 0 };
char buf[8];
pf_atapi(unit, ms_cmd, 8, buf, DBMSG("mode sense"));
PF.media_status = PF_RW;
pf_atapi(pf, ms_cmd, 8, buf, DBMSG("mode sense"));
pf->media_status = PF_RW;
if (buf[3] & 0x80)
PF.media_status = PF_RO;
pf->media_status = PF_RO;
}
static void xs(char *buf, char *targ, int offs, int len)
......@@ -652,37 +625,37 @@ static int xl(char *buf, int offs)
return v;
}
static void pf_get_capacity(int unit)
static void pf_get_capacity(struct pf_unit *pf)
{
char rc_cmd[12] = { ATAPI_CAPACITY, LUN, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
char rc_cmd[12] = { ATAPI_CAPACITY, pf->lun << 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
char buf[8];
int bs;
if (pf_atapi(unit, rc_cmd, 8, buf, DBMSG("get capacity"))) {
PF.media_status = PF_NM;
if (pf_atapi(pf, rc_cmd, 8, buf, DBMSG("get capacity"))) {
pf->media_status = PF_NM;
return;
}
PF.capacity = xl(buf, 0) + 1;
set_capacity(&pf->disk, xl(buf, 0) + 1);
bs = xl(buf, 4);
if (bs != 512) {
PF.capacity = 0;
set_capacity(&pf->disk, 0);
if (verbose)
printk("%s: Drive %d, LUN %d,"
" unsupported block size %d\n",
PF.name, PF.drive, PF.lun, bs);
pf->name, pf->drive, pf->lun, bs);
}
}
static int pf_identify(int unit)
static int pf_identify(struct pf_unit *pf)
{
int dt, s;
char *ms[2] = { "master", "slave" };
char mf[10], id[18];
char id_cmd[12] =
{ ATAPI_IDENTIFY, LUN, 0, 0, 36, 0, 0, 0, 0, 0, 0, 0 };
{ ATAPI_IDENTIFY, pf->lun << 5, 0, 0, 36, 0, 0, 0, 0, 0, 0, 0 };
char buf[36];
s = pf_atapi(unit, id_cmd, 36, buf, "identify");
s = pf_atapi(pf, id_cmd, 36, buf, "identify");
if (s)
return -1;
......@@ -690,58 +663,57 @@ static int pf_identify(int unit)
if ((dt != 0) && (dt != 7)) {
if (verbose)
printk("%s: Drive %d, LUN %d, unsupported type %d\n",
PF.name, PF.drive, PF.lun, dt);
pf->name, pf->drive, pf->lun, dt);
return -1;
}
xs(buf, mf, 8, 8);
xs(buf, id, 16, 16);
PF.removable = (buf[1] & 0x80);
pf->removable = (buf[1] & 0x80);
pf_mode_sense(unit);
pf_mode_sense(unit);
pf_mode_sense(unit);
pf_mode_sense(pf);
pf_mode_sense(pf);
pf_mode_sense(pf);
pf_get_capacity(unit);
pf_get_capacity(pf);
printk("%s: %s %s, %s LUN %d, type %d",
PF.name, mf, id, ms[PF.drive], PF.lun, dt);
if (PF.removable)
pf->name, mf, id, ms[pf->drive], pf->lun, dt);
if (pf->removable)
printk(", removable");
if (PF.media_status == PF_NM)
if (pf->media_status == PF_NM)
printk(", no media\n");
else {
if (PF.media_status == PF_RO)
if (pf->media_status == PF_RO)
printk(", RO");
printk(", %d blocks\n", PF.capacity);
printk(", %ld blocks\n", get_capacity(&pf->disk));
}
return 0;
}
/* returns 0, with id set if drive is detected
-1, if drive detection failed
*/
static int pf_probe(int unit)
static int pf_probe(struct pf_unit *pf)
{
if (PF.drive == -1) {
for (PF.drive = 0; PF.drive <= 1; PF.drive++)
if (!pf_reset(unit)) {
if (PF.lun != -1)
return pf_identify(unit);
if (pf->drive == -1) {
for (pf->drive = 0; pf->drive <= 1; pf->drive++)
if (!pf_reset(pf)) {
if (pf->lun != -1)
return pf_identify(pf);
else
for (PF.lun = 0; PF.lun < 8; PF.lun++)
if (!pf_identify(unit))
for (pf->lun = 0; pf->lun < 8; pf->lun++)
if (!pf_identify(pf))
return 0;
}
} else {
if (pf_reset(unit))
if (pf_reset(pf))
return -1;
if (PF.lun != -1)
return pf_identify(unit);
for (PF.lun = 0; PF.lun < 8; PF.lun++)
if (!pf_identify(unit))
if (pf->lun != -1)
return pf_identify(pf);
for (pf->lun = 0; pf->lun < 8; pf->lun++)
if (!pf_identify(pf))
return 0;
}
return -1;
......@@ -749,6 +721,7 @@ static int pf_probe(int unit)
static int pf_detect(void)
{
struct pf_unit *pf = units;
int k, unit;
printk("%s: %s version %s, major %d, cluster %d, nice %d\n",
......@@ -756,30 +729,30 @@ static int pf_detect(void)
k = 0;
if (pf_drive_count == 0) {
unit = 0;
if (pi_init(PI, 1, -1, -1, -1, -1, -1, pf_scratch,
PI_PF, verbose, PF.name)) {
if (!pf_probe(unit)) {
PF.present = 1;
if (pi_init(pf->pi, 1, -1, -1, -1, -1, -1, pf_scratch, PI_PF,
verbose, pf->name)) {
if (!pf_probe(pf)) {
pf->present = 1;
k++;
} else
pi_release(PI);
pi_release(pf->pi);
}
} else
for (unit = 0; unit < PF_UNITS; unit++)
if (DU[D_PRT])
if (pi_init
(PI, 0, DU[D_PRT], DU[D_MOD], DU[D_UNI],
DU[D_PRO], DU[D_DLY], pf_scratch, PI_PF,
verbose, PF.name)) {
if (!pf_probe(unit)) {
PF.present = 1;
for (unit = 0; unit < PF_UNITS; unit++, pf++) {
int *conf = *drives[unit];
if (!conf[D_PRT])
continue;
if (pi_init(pf->pi, 0, conf[D_PRT], conf[D_MOD],
conf[D_UNI], conf[D_PRO], conf[D_DLY],
pf_scratch, PI_PF, verbose, pf->name)) {
if (!pf_probe(pf)) {
pf->present = 1;
k++;
} else
pi_release(PI);
pi_release(pf->pi);
}
}
if (k)
return 0;
......@@ -789,10 +762,10 @@ static int pf_detect(void)
/* The i/o request engine */
static int pf_start(int unit, int cmd, int b, int c)
static int pf_start(struct pf_unit *pf, int cmd, int b, int c)
{
int i;
char io_cmd[12] = { cmd, LUN, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
char io_cmd[12] = { cmd, pf->lun << 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
for (i = 0; i < 4; i++) {
io_cmd[5 - i] = b & 0xff;
......@@ -802,7 +775,7 @@ static int pf_start(int unit, int cmd, int b, int c)
io_cmd[8] = c & 0xff;
io_cmd[7] = (c >> 8) & 0xff;
i = pf_command(unit, io_cmd, c * 512, "start i/o");
i = pf_command(pf, io_cmd, c * 512, "start i/o");
mdelay(1);
......@@ -811,9 +784,7 @@ static int pf_start(int unit, int cmd, int b, int c)
static int pf_ready(void)
{
int unit = pf_unit;
return (((status_reg(unit) & (STAT_BUSY | pf_mask)) == pf_mask));
return (((status_reg(pf_current) & (STAT_BUSY | pf_mask)) == pf_mask));
}
static void do_pf_request(request_queue_t * q)
......@@ -823,57 +794,65 @@ static void do_pf_request(request_queue_t * q)
if (pf_busy)
return;
repeat:
if (blk_queue_empty(QUEUE))
if (elv_queue_empty(QUEUE))
return;
pf_unit = unit = DEVICE_NR(CURRENT->rq_dev);
pf_block = CURRENT->sector;
pf_run = CURRENT->nr_sectors;
pf_count = CURRENT->current_nr_sectors;
pf_req = elv_next_request(QUEUE);
unit = DEVICE_NR(pf_req->rq_dev);
pf_current = units + unit;
pf_block = pf_req->sector;
pf_run = pf_req->nr_sectors;
pf_count = pf_req->current_nr_sectors;
if ((pf_unit >= PF_UNITS) || (pf_block + pf_count > PF.capacity)) {
end_request(CURRENT, 0);
if ((unit >= PF_UNITS) ||
(pf_block + pf_count > get_capacity(&pf_current->disk))) {
end_request(pf_req, 0);
goto repeat;
}
pf_cmd = rq_data_dir(CURRENT);
pf_buf = CURRENT->buffer;
pf_cmd = rq_data_dir(pf_req);
pf_buf = pf_req->buffer;
pf_retries = 0;
pf_busy = 1;
if (pf_cmd == READ)
pi_do_claimed(PI, do_pf_read);
pi_do_claimed(pf_current->pi, do_pf_read);
else if (pf_cmd == WRITE)
pi_do_claimed(PI, do_pf_write);
pi_do_claimed(pf_current->pi, do_pf_write);
else {
pf_busy = 0;
end_request(CURRENT, 0);
end_request(pf_req, 0);
goto repeat;
}
}
static void pf_next_buf(int unit)
static int pf_next_buf(void)
{
long saved_flags;
pf_count--;
pf_run--;
pf_buf += 512;
pf_block++;
if (!pf_run)
return 0;
if (!pf_count)
return 1;
spin_lock_irqsave(&pf_spin_lock, saved_flags);
end_request(CURRENT, 1);
if (!pf_run) {
end_request(pf_req, 1);
pf_count = pf_req->current_nr_sectors;
pf_buf = pf_req->buffer;
spin_unlock_irqrestore(&pf_spin_lock, saved_flags);
return;
}
/* paranoia */
if (blk_queue_empty(QUEUE) ||
(rq_data_dir(CURRENT) != pf_cmd) ||
(DEVICE_NR(CURRENT->rq_dev) != pf_unit) ||
(CURRENT->sector != pf_block))
printk("%s: OUCH: request list changed unexpectedly\n",
PF.name);
return 1;
}
pf_count = CURRENT->current_nr_sectors;
pf_buf = CURRENT->buffer;
static inline void next_request(int success)
{
long saved_flags;
spin_lock_irqsave(&pf_spin_lock, saved_flags);
end_request(pf_req, success);
pf_busy = 0;
do_pf_request(NULL);
spin_unlock_irqrestore(&pf_spin_lock, saved_flags);
}
......@@ -885,23 +864,16 @@ static void do_pf_read(void)
static void do_pf_read_start(void)
{
int unit = pf_unit;
long saved_flags;
pf_busy = 1;
if (pf_start(unit, ATAPI_READ_10, pf_block, pf_run)) {
pi_disconnect(PI);
if (pf_start(pf_current, ATAPI_READ_10, pf_block, pf_run)) {
pi_disconnect(pf_current->pi);
if (pf_retries < PF_MAX_RETRIES) {
pf_retries++;
pi_do_claimed(PI, do_pf_read_start);
pi_do_claimed(pf_current->pi, do_pf_read_start);
return;
}
spin_lock_irqsave(&pf_spin_lock, saved_flags);
end_request(CURRENT, 0);
pf_busy = 0;
do_pf_request(NULL);
spin_unlock_irqrestore(&pf_spin_lock, saved_flags);
next_request(0);
return;
}
pf_mask = STAT_DRQ;
......@@ -910,42 +882,25 @@ static void do_pf_read_start(void)
static void do_pf_read_drq(void)
{
int unit = pf_unit;
long saved_flags;
while (1) {
if (pf_wait(unit, STAT_BUSY, STAT_DRQ | STAT_ERR,
if (pf_wait(pf_current, STAT_BUSY, STAT_DRQ | STAT_ERR,
"read block", "completion") & STAT_ERR) {
pi_disconnect(PI);
pi_disconnect(pf_current->pi);
if (pf_retries < PF_MAX_RETRIES) {
pf_req_sense(unit, 0);
pf_req_sense(pf_current, 0);
pf_retries++;
pi_do_claimed(PI, do_pf_read_start);
pi_do_claimed(pf_current->pi, do_pf_read_start);
return;
}
spin_lock_irqsave(&pf_spin_lock, saved_flags);
end_request(CURRENT, 0);
pf_busy = 0;
do_pf_request(NULL);
spin_unlock_irqrestore(&pf_spin_lock, saved_flags);
next_request(0);
return;
}
pi_read_block(PI, pf_buf, 512);
pf_count--;
pf_run--;
pf_buf += 512;
pf_block++;
if (!pf_run)
pi_read_block(pf_current->pi, pf_buf, 512);
if (pf_next_buf())
break;
if (!pf_count)
pf_next_buf(unit);
}
pi_disconnect(PI);
spin_lock_irqsave(&pf_spin_lock, saved_flags);
end_request(CURRENT, 1);
pf_busy = 0;
do_pf_request(NULL);
spin_unlock_irqrestore(&pf_spin_lock, saved_flags);
pi_disconnect(pf_current->pi);
next_request(1);
}
static void do_pf_write(void)
......@@ -955,51 +910,34 @@ static void do_pf_write(void)
static void do_pf_write_start(void)
{
int unit = pf_unit;
long saved_flags;
pf_busy = 1;
if (pf_start(unit, ATAPI_WRITE_10, pf_block, pf_run)) {
pi_disconnect(PI);
if (pf_start(pf_current, ATAPI_WRITE_10, pf_block, pf_run)) {
pi_disconnect(pf_current->pi);
if (pf_retries < PF_MAX_RETRIES) {
pf_retries++;
pi_do_claimed(PI, do_pf_write_start);
pi_do_claimed(pf_current->pi, do_pf_write_start);
return;
}
spin_lock_irqsave(&pf_spin_lock, saved_flags);
end_request(CURRENT, 0);
pf_busy = 0;
do_pf_request(NULL);
spin_unlock_irqrestore(&pf_spin_lock, saved_flags);
next_request(0);
return;
}
while (1) {
if (pf_wait(unit, STAT_BUSY, STAT_DRQ | STAT_ERR,
if (pf_wait(pf_current, STAT_BUSY, STAT_DRQ | STAT_ERR,
"write block", "data wait") & STAT_ERR) {
pi_disconnect(PI);
pi_disconnect(pf_current->pi);
if (pf_retries < PF_MAX_RETRIES) {
pf_retries++;
pi_do_claimed(PI, do_pf_write_start);
pi_do_claimed(pf_current->pi, do_pf_write_start);
return;
}
spin_lock_irqsave(&pf_spin_lock, saved_flags);
end_request(CURRENT, 0);
pf_busy = 0;
do_pf_request(NULL);
spin_unlock_irqrestore(&pf_spin_lock, saved_flags);
next_request(0);
return;
}
pi_write_block(PI, pf_buf, 512);
pf_count--;
pf_run--;
pf_buf += 512;
pf_block++;
if (!pf_run)
pi_write_block(pf_current->pi, pf_buf, 512);
if (pf_next_buf())
break;
if (!pf_count)
pf_next_buf(unit);
}
pf_mask = 0;
ps_set_intr(do_pf_write_done, pf_ready, PF_TMO, nice);
......@@ -1007,34 +945,24 @@ static void do_pf_write_start(void)
static void do_pf_write_done(void)
{
int unit = pf_unit;
long saved_flags;
if (pf_wait(unit, STAT_BUSY, 0, "write block", "done") & STAT_ERR) {
pi_disconnect(PI);
if (pf_wait(pf_current, STAT_BUSY, 0, "write block", "done") & STAT_ERR) {
pi_disconnect(pf_current->pi);
if (pf_retries < PF_MAX_RETRIES) {
pf_retries++;
pi_do_claimed(PI, do_pf_write_start);
pi_do_claimed(pf_current->pi, do_pf_write_start);
return;
}
spin_lock_irqsave(&pf_spin_lock, saved_flags);
end_request(CURRENT, 0);
pf_busy = 0;
do_pf_request(NULL);
spin_unlock_irqrestore(&pf_spin_lock, saved_flags);
next_request(0);
return;
}
pi_disconnect(PI);
spin_lock_irqsave(&pf_spin_lock, saved_flags);
end_request(CURRENT, 1);
pf_busy = 0;
do_pf_request(NULL);
spin_unlock_irqrestore(&pf_spin_lock, saved_flags);
pi_disconnect(pf_current->pi);
next_request(1);
}
static int __init pf_init(void)
{ /* preliminary initialisation */
int i;
struct pf_unit *pf;
int unit;
request_queue_t *q;
if (disable)
......@@ -1055,19 +983,29 @@ static int __init pf_init(void)
blk_queue_max_phys_segments(q, cluster);
blk_queue_max_hw_segments(q, cluster);
for (i = 0; i < PF_UNITS; i++)
register_disk(NULL, mk_kdev(MAJOR_NR, i), 1, &pf_fops, 0);
for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++) {
struct gendisk *disk = &pf->disk;
if (!pf->present)
continue;
add_gendisk(disk);
register_disk(disk, mk_kdev(disk->major, disk->first_minor),
1<<disk->minor_shift, disk->fops,
get_capacity(disk));
}
return 0;
}
static void __exit pf_exit(void)
{
struct pf_unit *pf;
int unit;
unregister_blkdev(MAJOR_NR, name);
for (unit = 0; unit < PF_UNITS; unit++)
if (PF.present)
pi_release(PI);
for (pf = units, unit = 0; unit < PF_UNITS; pf++, unit++) {
if (!pf->present)
continue;
del_gendisk(&pf->disk);
pi_release(pf->pi);
}
}
MODULE_LICENSE("GPL");
......
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