amiflop: convert to blk-mq
Straightforward conversion, just use the existing amiflop_lock to serialize access to the controller. Compile-tested only. Cc: Laurent Vivier <lvivier@redhat.com> Signed-off-by: Omar Sandoval <osandov@fb.com> Converted to blk_mq_init_sq_queue() Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
parent
53d0f8dbde
commit
21b07f3554
|
@ -201,6 +201,7 @@ struct amiga_floppy_struct {
|
|||
int dirty; /* true when trackbuf is not on disk */
|
||||
int status; /* current error code for unit */
|
||||
struct gendisk *gendisk;
|
||||
struct blk_mq_tag_set tag_set;
|
||||
};
|
||||
|
||||
/*
|
||||
|
@ -281,7 +282,6 @@ static volatile int selected = -1; /* currently selected drive */
|
|||
static int writepending;
|
||||
static int writefromint;
|
||||
static char *raw_buf;
|
||||
static int fdc_queue;
|
||||
|
||||
static DEFINE_SPINLOCK(amiflop_lock);
|
||||
|
||||
|
@ -1454,76 +1454,20 @@ static int get_track(int drive, int track)
|
|||
return -1;
|
||||
}
|
||||
|
||||
/*
|
||||
* Round-robin between our available drives, doing one request from each
|
||||
*/
|
||||
static struct request *set_next_request(void)
|
||||
static blk_status_t amiflop_rw_cur_segment(struct amiga_floppy_struct *floppy,
|
||||
struct request *rq)
|
||||
{
|
||||
struct request_queue *q;
|
||||
int cnt = FD_MAX_UNITS;
|
||||
struct request *rq = NULL;
|
||||
|
||||
/* Find next queue we can dispatch from */
|
||||
fdc_queue = fdc_queue + 1;
|
||||
if (fdc_queue == FD_MAX_UNITS)
|
||||
fdc_queue = 0;
|
||||
|
||||
for(cnt = FD_MAX_UNITS; cnt > 0; cnt--) {
|
||||
|
||||
if (unit[fdc_queue].type->code == FD_NODRIVE) {
|
||||
if (++fdc_queue == FD_MAX_UNITS)
|
||||
fdc_queue = 0;
|
||||
continue;
|
||||
}
|
||||
|
||||
q = unit[fdc_queue].gendisk->queue;
|
||||
if (q) {
|
||||
rq = blk_fetch_request(q);
|
||||
if (rq)
|
||||
break;
|
||||
}
|
||||
|
||||
if (++fdc_queue == FD_MAX_UNITS)
|
||||
fdc_queue = 0;
|
||||
}
|
||||
|
||||
return rq;
|
||||
}
|
||||
|
||||
static void redo_fd_request(void)
|
||||
{
|
||||
struct request *rq;
|
||||
int drive = floppy - unit;
|
||||
unsigned int cnt, block, track, sector;
|
||||
int drive;
|
||||
struct amiga_floppy_struct *floppy;
|
||||
char *data;
|
||||
unsigned long flags;
|
||||
blk_status_t err;
|
||||
|
||||
next_req:
|
||||
rq = set_next_request();
|
||||
if (!rq) {
|
||||
/* Nothing left to do */
|
||||
return;
|
||||
}
|
||||
|
||||
floppy = rq->rq_disk->private_data;
|
||||
drive = floppy - unit;
|
||||
|
||||
next_segment:
|
||||
/* Here someone could investigate to be more efficient */
|
||||
for (cnt = 0, err = BLK_STS_OK; cnt < blk_rq_cur_sectors(rq); cnt++) {
|
||||
for (cnt = 0; cnt < blk_rq_cur_sectors(rq); cnt++) {
|
||||
#ifdef DEBUG
|
||||
printk("fd: sector %ld + %d requested for %s\n",
|
||||
blk_rq_pos(rq), cnt,
|
||||
(rq_data_dir(rq) == READ) ? "read" : "write");
|
||||
#endif
|
||||
block = blk_rq_pos(rq) + cnt;
|
||||
if ((int)block > floppy->blocks) {
|
||||
err = BLK_STS_IOERR;
|
||||
break;
|
||||
}
|
||||
|
||||
track = block / (floppy->dtype->sects * floppy->type->sect_mult);
|
||||
sector = block % (floppy->dtype->sects * floppy->type->sect_mult);
|
||||
data = bio_data(rq->bio) + 512 * cnt;
|
||||
|
@ -1532,10 +1476,8 @@ next_segment:
|
|||
"0x%08lx\n", track, sector, data);
|
||||
#endif
|
||||
|
||||
if (get_track(drive, track) == -1) {
|
||||
err = BLK_STS_IOERR;
|
||||
break;
|
||||
}
|
||||
if (get_track(drive, track) == -1)
|
||||
return BLK_STS_IOERR;
|
||||
|
||||
if (rq_data_dir(rq) == READ) {
|
||||
memcpy(data, floppy->trackbuf + sector * 512, 512);
|
||||
|
@ -1543,31 +1485,40 @@ next_segment:
|
|||
memcpy(floppy->trackbuf + sector * 512, data, 512);
|
||||
|
||||
/* keep the drive spinning while writes are scheduled */
|
||||
if (!fd_motor_on(drive)) {
|
||||
err = BLK_STS_IOERR;
|
||||
break;
|
||||
}
|
||||
if (!fd_motor_on(drive))
|
||||
return BLK_STS_IOERR;
|
||||
/*
|
||||
* setup a callback to write the track buffer
|
||||
* after a short (1 tick) delay.
|
||||
*/
|
||||
local_irq_save(flags);
|
||||
|
||||
floppy->dirty = 1;
|
||||
/* reset the timer */
|
||||
mod_timer (flush_track_timer + drive, jiffies + 1);
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
}
|
||||
|
||||
if (__blk_end_request_cur(rq, err))
|
||||
goto next_segment;
|
||||
goto next_req;
|
||||
return BLK_STS_OK;
|
||||
}
|
||||
|
||||
static void do_fd_request(struct request_queue * q)
|
||||
static blk_status_t amiflop_queue_rq(struct blk_mq_hw_ctx *hctx,
|
||||
const struct blk_mq_queue_data *bd)
|
||||
{
|
||||
redo_fd_request();
|
||||
struct request *rq = bd->rq;
|
||||
struct amiga_floppy_struct *floppy = rq->rq_disk->private_data;
|
||||
blk_status_t err;
|
||||
|
||||
if (!spin_trylock_irq(&amiflop_lock))
|
||||
return BLK_STS_DEV_RESOURCE;
|
||||
|
||||
blk_mq_start_request(rq);
|
||||
|
||||
do {
|
||||
err = amiflop_rw_cur_segment(floppy, rq);
|
||||
} while (blk_update_request(rq, err, blk_rq_cur_bytes(rq)));
|
||||
blk_mq_end_request(rq, err);
|
||||
|
||||
spin_unlock_irq(&amiflop_lock);
|
||||
return BLK_STS_OK;
|
||||
}
|
||||
|
||||
static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
|
||||
|
@ -1818,6 +1769,10 @@ static const struct block_device_operations floppy_fops = {
|
|||
.check_events = amiga_check_events,
|
||||
};
|
||||
|
||||
static const struct blk_mq_ops amiflop_mq_ops = {
|
||||
.queue_rq = amiflop_queue_rq,
|
||||
};
|
||||
|
||||
static struct gendisk *fd_alloc_disk(int drive)
|
||||
{
|
||||
struct gendisk *disk;
|
||||
|
@ -1826,7 +1781,8 @@ static struct gendisk *fd_alloc_disk(int drive)
|
|||
if (!disk)
|
||||
goto out;
|
||||
|
||||
disk->queue = blk_init_queue(do_fd_request, &amiflop_lock);
|
||||
disk->queue = blk_mq_init_sq_queue(&unit[drive].tag_set, &amiflop_mq_ops,
|
||||
2, BLK_MQ_F_SHOULD_MERGE);
|
||||
if (IS_ERR(disk->queue)) {
|
||||
disk->queue = NULL;
|
||||
goto out_put_disk;
|
||||
|
@ -1841,6 +1797,7 @@ static struct gendisk *fd_alloc_disk(int drive)
|
|||
out_cleanup_queue:
|
||||
blk_cleanup_queue(disk->queue);
|
||||
disk->queue = NULL;
|
||||
blk_mq_free_tag_set(&unit[drive].tag_set);
|
||||
out_put_disk:
|
||||
put_disk(disk);
|
||||
out:
|
||||
|
|
Loading…
Reference in New Issue