Re: HDIO_SET_DMA failed: Operation not permitted
Tim Beauregard wrote:
Hi,
Could someone please help me find the kernel config settings which I've
neglected, that prevent me from using DMA? I expected inclusion of AMD
and nVidia IDE chipset support (CONFIG_BLK_DEV_AMD74XX=m) would be
sufficient. I have tried enabling DMA only for disks
(CONFIG_IDEDMA_ONLYDISK). I can enable DMA normally with the stock
2.2.20-idepci kernel. I'm using Debian Unstable. I have tried setting
idebus=66 (100 didn't work), and acpi=off.
Follows is a series of relevant logs and messages.
Thanks in advance,
Tim
[...]
Still no joy. I've installed numerous different kernels now, and can
turn DMA on only with downloaded images of 2.2-2.6 series as
well as one compiled 2.4 series. There are ide-core, ide-detect,
ide-disk and ide-generic modules installed on those images. On my
self-compiled 2.6.4 I have
# ATA/ATAPI/MFM/RLL support
#
CONFIG_IDE=y
CONFIG_BLK_DEV_IDE=y
#
# Please see Documentation/ide.txt for help/info on IDE drives
#
# CONFIG_BLK_DEV_HD_IDE is not set
CONFIG_BLK_DEV_IDEDISK=y
# CONFIG_IDEDISK_MULTI_MODE is not set
# CONFIG_IDEDISK_STROKE is not set
# CONFIG_BLK_DEV_IDECD is not set
# CONFIG_BLK_DEV_IDETAPE is not set
# CONFIG_BLK_DEV_IDEFLOPPY is not set
CONFIG_BLK_DEV_IDESCSI=y
# CONFIG_IDE_TASK_IOCTL is not set
# CONFIG_IDE_TASKFILE_IO is not set
#
# IDE chipset support/bugfixes
#
CONFIG_IDE_GENERIC=y
# CONFIG_BLK_DEV_CMD640 is not set
# CONFIG_BLK_DEV_IDEPNP is not set
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_IDEPCI_SHARE_IRQ=y
# CONFIG_BLK_DEV_OFFBOARD is not set
CONFIG_BLK_DEV_GENERIC=m
# CONFIG_BLK_DEV_OPTI621 is not set
CONFIG_BLK_DEV_RZ1000=y
CONFIG_BLK_DEV_IDEDMA_PCI=y
# CONFIG_BLK_DEV_IDEDMA_FORCED is not set
CONFIG_IDEDMA_PCI_AUTO=y
# CONFIG_IDEDMA_ONLYDISK is not set
CONFIG_BLK_DEV_ADMA=y
# CONFIG_BLK_DEV_AEC62XX is not set
# CONFIG_BLK_DEV_ALI15X3 is not set
CONFIG_BLK_DEV_AMD74XX=m
___________________________________________
I've also tried passing ide0=dma to the kernel, however hdparm will not
turn DMA on following this. Can anyone suggest where I'm going wrong?
Thanks, Tim
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