[gentoo-user] unable to activate dma mode

["Stefán István" <stefi@geohidroterv.hu>]

Hello!
I'm not able to activate dma mode for cdrom drive in my laptop.
# hdparm -d1 /dev/hdd

/dev/hdd:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 using_dma    =  0 (off)

I have the following hardvers:
# lspci
00:00.0 Host bridge: Intel Corporation Mobile 915GM/PM/GMS/910GML Express 
Processor to DRAM Controller (rev 04)
00:01.0 PCI bridge: Intel Corporation Mobile 915GM/PM Express PCI Express Root 
Port (rev 04)
00:1b.0 Audio device: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) PCI 
Express Port 1 (rev 04)
00:1d.0 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
USB UHCI #1 (rev 04)
00:1d.1 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
USB UHCI #2 (rev 04)
00:1d.2 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
USB UHCI #3 (rev 04)
00:1d.3 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
USB UHCI #4 (rev 04)
00:1d.7 USB Controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) 
USB2 EHCI Controller (rev 04)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev d4)
00:1f.0 ISA bridge: Intel Corporation 82801FBM (ICH6M) LPC Interface Bridge 
(rev 04)
00:1f.2 IDE interface: Intel Corporation 82801FBM (ICH6M) SATA Controller (rev 
04)
00:1f.3 SMBus: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) SMBus 
Controller (rev 04)
01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility X700 
(PCIE)
06:03.0 Network controller: Intel Corporation PRO/Wireless 2200BG Network 
Connection (rev 05)
06:04.0 CardBus bridge: Texas Instruments PCIxx21/x515 Cardbus Controller
06:04.2 FireWire (IEEE 1394): Texas Instruments OHCI Compliant IEEE 1394 Host 
Controller
06:04.3 Mass storage controller: Texas Instruments PCIxx21 Integrated 
FlashMedia Controller
06:04.4 Class 0805: Texas Instruments PCI6411, PCI6421, PCI6611, PCI6621, 
PCI7411, PCI7421, PCI7611, PCI7621 Secure Digital (SD) Controller
06:05.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit 
Ethernet (rev 10)

And dmesg:
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
ide0: I/O resource 0x1F0-0x1F7 not free.
ide0: ports already in use, skipping probe
Probing IDE interface ide1...
input: AT Translated Set 2 keyboard as /class/input/input0
hdd: PHILIPS DVD+/-RW SDVD8441, ATAPI CD/DVD-ROM drive
input: ImPS/2 Logitech Wheel Mouse as /class/input/input1
ide1 at 0x170-0x177,0x376 on irq 15
hdd: ATAPI 24X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache
Uniform CD-ROM driver Revision: 3.20

I think the problem is that there is no driver for this chipset compiled into 
the kernel. But I don't know which driver should be compiled into. I tried 
Intel PIIXn but it didn't help.

Thanks for the help in advance,
István

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