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Limit the maximum I/O size to 8 pages for version 2 controllers. This

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fixes problems with some mlx(4) cards in Alpha machines.

Reviewed by:	msmith (ages ago)
This commit is contained in:
jhb 2003-02-25 20:47:22 +00:00
parent 7bc17a0066
commit f1c8252d4a
1 changed files with 8 additions and 4 deletions
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12
sys/dev/mlx/mlx_disk.c
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@ -235,11 +235,15 @@ mlxd_attach(device_t dev)
/*
* Set maximum I/O size to the lesser of the recommended maximum and the practical
* maximum.
* maximum except on v2 cards where the maximum is set to 8 pages.
*/
s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE;
s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * PAGE_SIZE;
sc->mlxd_disk.d_maxsize = imin(s1, s2);
if (sc->mlxd_controller->mlx_iftype == MLX_IFTYPE_2)
dsk->si_iosize_max = 8 * PAGE_SIZE;
else {
s1 = sc->mlxd_controller->mlx_enq2->me_maxblk * MLX_BLKSIZE;
s2 = (sc->mlxd_controller->mlx_enq2->me_max_sg - 1) * PAGE_SIZE;
dsk->si_iosize_max = imin(s1, s2);
}
disk_create(sc->mlxd_unit, &sc->mlxd_disk, 0, NULL, NULL);