Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit e5f0d2e2 authored by Finn Thain's avatar Finn Thain Committed by Geert Uytterhoeven
Browse files

m68k/mac: Enable PDMA support for PowerBook 190 



Stan's tests showed that PDMA improves sequential read performance by
a factor of 5 on a PowerBook 190. Last time I tried this on a
PowerBook 520 it didn't work, so let's not enable it there until
it can be tested with the present mac_scsi driver.

Tested-by: default avatarStan Johnson <userm57@yahoo.com>
Signed-off-by: default avatarFinn Thain <fthain@telegraphics.com.au>
Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
parent 0c8efd61

arch/m68k/mac/config.c

+2 −4
Original line number Diff line number Diff line
@@ -699,7 +699,7 @@ static struct mac_model mac_data_table[] = { 
		.name		= "PowerBook 190",

		.adb_type	= MAC_ADB_PB2,

		.via_type	= MAC_VIA_QUADRA,

		.scsi_type	= MAC_SCSI_LATE,

		.scsi_type	= MAC_SCSI_OLD,

		.ide_type	= MAC_IDE_BABOON,

		.scc_type	= MAC_SCC_QUADRA,

		.floppy_type	= MAC_FLOPPY_SWIM_ADDR2,
@@ -1061,9 +1061,7 @@ int __init mac_platform_init(void) 
			mac_scsi_old_rsrc, ARRAY_SIZE(mac_scsi_old_rsrc));

		break;

	case MAC_SCSI_LATE:

		/* PDMA logic in 68040 PowerBooks is somehow different to

		 * '030 models. It's probably more like Quadras (see mac_esp).

		 */

		/* XXX PDMA support for PowerBook 500 series needs testing */

		platform_device_register_simple("mac_scsi", 0,

			mac_scsi_late_rsrc, ARRAY_SIZE(mac_scsi_late_rsrc));

		break;