Messages in this thread | | | Date | Wed, 15 Apr 1998 13:08:52 -0700 | From | Don Fisher <> | Subject | DMA on CMD646 went away in 2.1.9x series? |
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My 2.1.88 kernel supports DMA on IDE disks, while the 2.1.96 protests the hdparm command with the following.
setting using_dma to 1 (on) HDIO_SET_DMA failed: Operation not permitted using_dma = 0 (off).
On boot, my 2.1 88 kernel printed the following
CMD646: IDE controller on PCI bus 0 function 104 PCI->APIC IRQ transform: (B0,I13,P0) -> -1 CMD646: not 100% native mode - will probe irq's later ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda: pio hdb: pio
while the 2.1.95 kernel prints
CMD646: ignored by ide_scan_pci_device() (uses own driver).
I tried to enable the CMD640 extensions in the config file. The CMD646 driver seems to be just an init for a sparc?
Please tell me how to enable the correct driver to enable DMA transfers.
Thanks don
------------------------------------------------------------------- | Don Fisher dfisher@as.arizona.edu | | MMT Observatory VOICE: (520)621-7647 | | University of Arizona FAX: (520)670-5740 | | Tucson, AZ 85721 | -------------------------------------------------------------------
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