rendered paste bodyI'm trying to enable DMA for my dvd drive (/dev/hdc). How do I enable it?
Here is the output from hdparm, lspci, and the kernel configuration.
### hdparm -d1 /dev/hdc
/dev/hdc:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)
###lspci
00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS/940GML and 945GT Express Memory Controller Hub (rev 03)
00:01.0 PCI bridge: Intel Corporation Mobile 945GM/PM/GMS/940GML and 945GT Express PCI Express Root Port (rev 03)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
00:1c.3 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 4 (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) Serial ATA Storage Controller IDE (rev 01)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01)
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility X1400
03:00.0 Ethernet controller: Broadcom Corporation BCM4401-B0 100Base-TX (rev 02)03:01.0 FireWire (IEEE 1394): Ricoh Co Ltd Unknown device 0832
03:01.1 Class 0805: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 19)
03:01.2 System peripheral: Ricoh Co Ltd Unknown device 0843 (rev 01)
03:01.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 0a)
03:01.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 05)
0b:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)
###kernel
Device Drivers --> ATA/ATAPI/MFM/RLL support:
<*> ATA/ATAPI/MFM/RLL support
│ │ <*> Enhanced IDE/MFM/RLL disk/cdrom/tape/floppy support │ │
│ │ --- Please see Documentation/ide.txt for help/info on IDE drives│ │
│ │ [ ] Support for SATA (deprecated; conflicts with libata SATA dri│ │
│ │ [ ] Use old disk-only driver on primary interface │ │
│ │ <*> Include IDE/ATA-2 DISK support │ │
│ │ [*] Use multi-mode by default │ │
│ │ <M> PCMCIA IDE support │ │
│ │ <*> Include IDE/ATAPI CDROM support │ │
│ │ < > Include IDE/ATAPI TAPE support (EXPERIMENTAL) │ │
│ │ < > Include IDE/ATAPI FLOPPY support │ │
│ │ < > SCSI emulation support │ │
│ │ [ ] IDE Taskfile Access │ │
│ │ --- IDE chipset support/bugfixes │ │
│ │ <*> generic/default IDE chipset support │ │
│ │ [*] CMD640 chipset bugfix/support │ │
│ │ [ ] CMD640 enhanced support │ │
│ │ [ ] PNP EIDE support │ │
│ │ [*] PCI IDE chipset support │ │
│ │ [*] Sharing PCI IDE interrupts support │ │
│ │ [ ] Boot off-board chipsets first support │ │
│ │ <*> Generic PCI IDE Chipset Support │ │
│ │ < > OPTi 82C621 chipset enhanced support (EXPERIMENTAL) │ │
│ │ <*> RZ1000 chipset bugfix/support │ │
│ │ [*] Generic PCI bus-master DMA support │ │
│ │ [ ] Force enable legacy 2.0.X HOSTS to use DMA │ │
│ │ [*] Use PCI DMA by default when available │ │
│ │ [ ] Enable DMA only for disks │ │
│ │ < > AEC62XX chipset support │ │
│ │ < > ALI M15x3 chipset support │ │
│ │ < > AMD and nVidia IDE support │ │
│ │ <M> ATI IXP chipset IDE support │ │
│ │ < > CMD64{3|6|8|9} chipset support │ │
│ │ < > Compaq Triflex IDE support │ │
│ │ < > CY82C693 chipset support │ │
│ │ < > Cyrix CS5510/20 MediaGX chipset support (VERY EXPERIMENT│ │
│ │ < > Cyrix/National Semiconductor CS5530 MediaGX chipset supp│ │
│ │ < > AMD CS5535 chipset support
│ │ < > CMD64{3|6|8|9} chipset support │ │
│ │ < > Compaq Triflex IDE support │ │
│ │ < > CY82C693 chipset support │ │
│ │ < > Cyrix CS5510/20 MediaGX chipset support (VERY EXPERIMENT│ │
│ │ < > Cyrix/National Semiconductor CS5530 MediaGX chipset supp│ │
│ │ < > AMD CS5535 chipset support │ │
│ │ < > HPT34X chipset support │ │
│ │ < > HPT36X/37X chipset support │ │
│ │ < > National SCx200 chipset support │ │
│ │ <*> Intel PIIXn chipsets support │ │
│ │ < > IT821X IDE support │ │
│ │ < > NS87415 chipset support │ │
│ │ < > PROMISE PDC202{46|62|65|67} support │ │
│ │ < > PROMISE PDC202{68|69|70|71|75|76|77} support │ │
│ │ < > ServerWorks OSB4/CSB5/CSB6 chipsets support │ │
│ │ < > Silicon Image chipset support │ │
│ │ < > SiS5513 chipset support │ │
│ │ < > SLC90E66 chipset support │ │
│ │ < > Tekram TRM290 chipset support │ │
│ │ < > VIA82CXXX chipset support │ │
│ │ [ ] Other IDE chipset support │ │
│ │ [ ] IGNORE word93 Validation BITS