Messages in this thread |  | | Date | Wed, 8 Jan 2003 00:16:51 -0500 | Subject | IDE DMA disabled with via82cxxx on kernels >= 2.5.35 | From | rwhron@earthlin ... |
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I have two machines with VIA chipsets. Recent 2.5 kernels boot with "DMA disabled".
On Athlon, hdparm -tT /dev/hda is about 8 times higher on 2.4 than 2.5 kernels. hdparm -i says dma is (on) though.
I tried CONFIG_BLK_DEV_IDEDMA_FORCED=y, but that didn't eliminated the "DMA disabled" message. Other IDE settings are:
CONFIG_IDE=y CONFIG_BLK_DEV_IDE=y CONFIG_BLK_DEV_IDEDISK=y CONFIG_IDEDISK_MULTI_MODE=y CONFIG_BLK_DEV_IDECD=m CONFIG_BLK_DEV_IDEPCI=y CONFIG_BLK_DEV_IDEDMA_PCI=y CONFIG_IDEDMA_PCI_AUTO=y CONFIG_BLK_DEV_IDEDMA=y CONFIG_IDEDMA_AUTO=y CONFIG_BLK_DEV_IDE_MODES=y
boot message: VP_IDE: IDE controller at PCI slot 00:07.1 VP_IDE: chipset revision 6 VP_IDE: not 100%% native mode: will probe irqs later VP_IDE: VIA vt82c686b (rev 40) IDE UDMA100 controller on pci00:07.1 ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:pio ide1: BM-DMA at 0xd008-0xd00f, BIOS settings: hdc:DMA, hdd:pio hda: IC35L040AVER07-0, ATA DISK drive hda: IRQ probe failed (0xffffffba) hda: DMA disabled ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
lspci 00:00.0 Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133] (rev 03) 00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP] 00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 40) 00:07.1 IDE interface: VIA Technologies, Inc. VT82C586B PIPC Bus Master IDE (rev 06) 00:07.4 Bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 40)
I also have a K6/2 with a VIA chipset. 2.5.34 and earlier were fine. 2.5.34-mm4 and subsequent 2.5.x kernels boot with "DMA disabled".
lspci 00:00.0 Host bridge: VIA Technologies, Inc. VT82C598 [Apollo MVP3] (rev 04) 00:01.0 PCI bridge: VIA Technologies, Inc. VT82C598/694x [Apollo MVP3/Pro133x AGP] 00:07.0 ISA bridge: VIA Technologies, Inc. VT82C586/A/B PCI-to-ISA [Apollo VP] (rev 47) 00:07.1 IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 06)
The K6/2 boots with:
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2 ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx VP_IDE: IDE controller at PCI slot 00:07.1 VP_IDE: chipset revision 6 VP_IDE: not 100% native mode: will probe irqs later VP_IDE: VIA vt82c586b (rev 47) IDE UDMA33 controller on pci00:07.1 ide0: BM-DMA at 0xe000-0xe007, BIOS settings: hda:DMA, hdb:DMA ide1: BM-DMA at 0xe008-0xe00f, BIOS settings: hdc:DMA, hdd:DMA hda: Maxtor 51536U3, ATA DISK drive hdb: ATAPI CDROM, ATAPI CD/DVD-ROM drive hda: DMA disabled hdb: DMA disabled ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
-- Randy Hron http://home.earthlink.net/~rwhron/kernel/bigbox.html
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