/*
* Read/write routine for a buffer. Finds the proper unit, range checks
* arguments, and schedules the transfer. Does not wait for the transfer
* to complete. Multi-page transfers are supported. All I/O requests must
* be a multiple of a sector in length.
*/
static int
idad_strategy(struct dev_strategy_args *ap)
{
cdev_t dev = ap->a_head.a_dev;
struct bio *bio = ap->a_bio;
struct buf *bp = bio->bio_buf;
struct idad_softc *drv;
drv = idad_getsoftc(dev);
if (drv == NULL) {
bp->b_error = EINVAL;
goto bad;
}
/*
* software write protect check
*/
if ((drv->flags & DRV_WRITEPROT) && bp->b_cmd != BUF_CMD_READ) {
bp->b_error = EROFS;
goto bad;
}
/*
* If it's a null transfer, return immediately
*/
if (bp->b_bcount == 0)
goto done;
bio->bio_driver_info = drv;
crit_enter();
devstat_start_transaction(&drv->stats);
ida_submit_buf(drv->controller, bio);
crit_exit();
return(0);
bad:
bp->b_flags |= B_ERROR;
done:
/*
* Correctly set the buf to indicate a completed transfer
*/
bp->b_resid = bp->b_bcount;
biodone(bio);
return(0);
}
/*
* Read/write routine for a buffer. Finds the proper unit, range checks
* arguments, and schedules the transfer. Does not wait for the transfer
* to complete. Multi-page transfers are supported. All I/O requests must
* be a multiple of a sector in length.
*/
static void
idad_strategy(struct bio *bp)
{
struct idad_softc *drv;
int s;
drv = bp->bio_disk->d_drv1;
if (drv == NULL) {
bp->bio_error = EINVAL;
goto bad;
}
/*
* software write protect check
*/
if (drv->flags & DRV_WRITEPROT && (bp->bio_cmd == BIO_WRITE)) {
bp->bio_error = EROFS;
goto bad;
}
bp->bio_driver1 = drv;
s = splbio();
ida_submit_buf(drv->controller, bp);
splx(s);
return;
bad:
bp->bio_flags |= BIO_ERROR;
/*
* Correctly set the buf to indicate a completed transfer
*/
bp->bio_resid = bp->bio_bcount;
biodone(bp);
return;
}