static void
mfi_disk_strategy(struct bio *bio)
{
struct mfi_disk *sc;
struct mfi_softc *controller;
sc = bio->bio_disk->d_drv1;
if (sc == NULL) {
bio->bio_error = EINVAL;
bio->bio_flags |= BIO_ERROR;
bio->bio_resid = bio->bio_bcount;
biodone(bio);
return;
}
controller = sc->ld_controller;
bio->bio_driver1 = (void *)(uintptr_t)sc->ld_id;
/* Mark it as LD IO */
bio->bio_driver2 = (void *)MFI_LD_IO;
mtx_lock(&controller->mfi_io_lock);
mfi_enqueue_bio(controller, bio);
mfi_startio(controller);
mtx_unlock(&controller->mfi_io_lock);
return;
}
static int
mfi_disk_strategy(struct dev_strategy_args *ap)
{
struct bio *bio = ap->a_bio;
struct buf *bp = bio->bio_buf;
struct mfi_disk *sc = ap->a_head.a_dev->si_drv1;
struct mfi_softc *controller = sc->ld_controller;
if (sc == NULL) {
bp->b_error = EINVAL;
bp->b_flags |= B_ERROR;
bp->b_resid = bp->b_bcount;
biodone(bio);
return (0);
}
if (controller->hw_crit_error) {
bp->b_error = EBUSY;
return (0);
}
if (controller->issuepend_done == 0) {
bp->b_error = EBUSY;
return (0);
}
/*
* XXX swildner
*
* If it's a null transfer, do nothing. FreeBSD's original driver
* doesn't have this, but that caused hard error messages (even
* though everything else continued to work fine). Interestingly,
* only when HAMMER was used.
*
* Several others of our RAID drivers have this check, such as
* aac(4) and ida(4), so we insert it here, too.
*
* The cause of null transfers is yet unknown.
*/
if (bp->b_bcount == 0) {
bp->b_resid = bp->b_bcount;
biodone(bio);
return (0);
}
bio->bio_driver_info = sc;
lockmgr(&controller->mfi_io_lock, LK_EXCLUSIVE);
mfi_enqueue_bio(controller, bio);
devstat_start_transaction(&sc->ld_devstat);
mfi_startio(controller);
lockmgr(&controller->mfi_io_lock, LK_RELEASE);
return (0);
}
