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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: Stan Johnson <userm57@yahoo.com>
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
hifive-unleashed-5.1
Finn Thain 2018-01-27 18:51:40 -05:00 committed by Geert Uytterhoeven
parent 0c8efd610b
commit e5f0d2e2a1
1 changed files with 2 additions and 4 deletions
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6
arch/m68k/mac/config.c
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@ -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;