[ltp] DMA transfers on TP 765L

[Thomas Hood]

In case it's of some use to you, here are the relevant
lines from my dmesg output (ThinkPad 600 51U):   // Thomas

Uniform Multi-Platform E-IDE driver Revision: 6.31
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
PIIX4: IDE controller on PCI bus 00 dev 39
PIIX4: chipset revision 1
PIIX4: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0xfcf0-0xfcf7, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0xfcf8-0xfcff, BIOS settings: hdc:DMA, hdd:pio
hda: IBM-DCXA-210000, ATA DISK drive
hdc: TOSHIBA CD-ROM XM-1702BC, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide1 at 0x170-0x177,0x376 on irq 15
hda: 19640880 sectors (10056 MB) w/420KiB Cache, CHS=1299/240/63, UDMA(33)
hdc: ATAPI 24X CD-ROM drive, 128kB Cache, DMA
Uniform CD-ROM driver Revision: 3.12
Partition check:
 hda: hda1 hda2 < hda5 hda6 hda7 hda8 >


--- Tino Keitel <tino.keitel@web.de> wrote: > Hi folks,
> 
> can anyone tell me how to enable DMA transfers for my IDE-HD? Win95 is able 
> to do this with the standard bus master driver, so the IDE interface and the 
> hard disk both support DMA transfers. Here are the messages when the kernel 
> detects the IDE interface:
> 
> PIIX: IDE controller on PCI bus 00 dev 08
> PIIX: not 100% native mode: will probe irqs later
> PIIX: neither IDE port enabled (BIOS)
> hda: IBM-DPLA-25120, ATA DISK drive
> hdb: SANYO CRD-S54P, ATAPI CDROM drive
> ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
> hda: IBM-DPLA-25120, 4887MB w/468kB Cache, CHS=662/240/63
> 
> AFAIK I can only turn on DMA transfers using hdparm if the kernel reports 
> "ide0: BM-DMA at...". I looked into the kernel sources and it seems that DMA 
> isn't possible because of the line "neither IDE port enabled (BIOS)". How can
> 
> I enable the IDE port? Or am I completely wrong?
> 
> Tino
> 
> ----- The Linux ThinkPad mailing list -----
> The linux-thinkpad mailing list home page is at:
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