could not enable cdrom/dvd dma acces

dont_stop_me · 07-09-2007, 09:00 AM

I am trying to enable the dma acces mode for my DVD-rom but I get this error:

Code:

/dev/hdb:
 setting 32-bit IO_support flag to 3
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 IO_support    =  3 (32-bit w/sync)
 using_dma     =  0 (off)

And this is a part of my .conf file for the kernel:

Code:

#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.21.5
# Sun Jul  8 17:49:13 2007
#
CONFIG_X86_32=y
CONFIG_GENERIC_TIME=y
CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_SEMAPHORE_SLEEPERS=y
CONFIG_X86=y
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_DMI=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"

dmesg:

Code:

Linux version 2.6.21.5-smp (root@darkstar) (gcc version 4.1.2) #1 SMP Sun Jul 8 17:59:58 EEST 2007
...
Entering add_active_range(0, 0, 393136) 0 entries of 256 used
Zone PFN ranges:
  DMA             0 ->     4096
  Normal       4096 ->   229376
  HighMem    229376 ->   393136
early_node_map[1] active PFN ranges
    0:        0 ->   393136
On node 0 totalpages: 393136
  DMA zone: 32 pages used for memmap
  DMA zone: 0 pages reserved
  DMA zone: 4064 pages, LIFO batch:0
  Normal zone: 1760 pages used for memmap
  Normal zone: 223520 pages, LIFO batch:31
  HighMem zone: 1279 pages used for memmap
  HighMem zone: 162481 pages, LIFO batch:31
DMI 2.3 present.


Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
Probing IDE interface ide0...
hdb: SONY DVD RW DRU-710A, ATAPI CD/DVD-ROM drive
ide1: I/O resource 0x170-0x177 not free.
ide1: ports already in use, skipping probe
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
hdb: ATAPI 48X DVD-ROM DVD-R CD-R/RW drive, 2048kB Cache
Uniform CD-ROM driver Revision: 3.20
ide-floppy driver 0.99.newide
Loading iSCSI transport class v2.0-724.
ata_piix 0000:00:1f.2: version 2.10ac1
ata_piix 0000:00:1f.2: MAP [ IDE IDE P0 P1 ]
ACPI: PCI Interrupt 0000:00:1f.2[A] -> GSI 18 (level, low) -> IRQ 16
ata: 0x1F0 IDE port busy
ata: conflict with ide0
PCI: Setting latency timer of device 0000:00:1f.2 to 64
ata1: DUMMY
ata2: SATA max UDMA/133 cmd 0x00010170 ctl 0x00010376 bmdma 0x0001fc08 irq 15
scsi0 : ata_piix
scsi1 : ata_piix
ata2.00: ATA-7: ST3160811AS, 3.AAE, max UDMA/133
ata2.00: 312581808 sectors, multi 16: LBA48 NCQ (depth 0/32)
ata2.00: configured for UDMA/133
scsi 1:0:0:0: Direct-Access     ATA      ST3160811AS      3.AA PQ: 0 ANSI: 5
SCSI device sda: 312581808 512-byte hdwr sectors (160042 MB)
sda: Write Protect is off
sda: Mode Sense: 00 3a 00 00
SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA
SCSI device sda: 312581808 512-byte hdwr sectors (160042 MB)
sda: Write Protect is off
sda: Mode Sense: 00 3a 00 00
SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA

what should i do?

MS3FGX · 07-09-2007, 09:13 AM

You are setting the DMA option as the root user, correct? You won't be able to do it with a normal user account.

dont_stop_me · 07-09-2007, 09:23 AM

right, I'm using root account I get the same error with hdparm if i put in rc.local

onebuck · 07-09-2007, 09:24 AM

Hi,

What is the output as root from cli;

Code:

#hdparm -iI /dev/hdb

This will get you the device parameters to show what the device is able to be setup as.

Do a 'man hdparm' to understand the command.

MS3FGX · 07-09-2007, 09:26 AM

Alright, in that case, have you tried setting the DMA from a live CD? So that you have a system with a (hopefully) clean configuration and fully featured kernel?

I find that is usually the easiest way to diagnose a kernel problem. If the thing I am trying to do doesn't appear to work in any live CDs, then I know it isn't something I did wrong. It is either the hardware or the kernel itself. For example, you may need to compile in specific support for your chipset. I know on my laptop I have to, or else DMA will always fail.

merer · 07-10-2007, 01:52 AM

I had the same problem on Slackware 12, with Intel ICH6 SATA Controller. My hard disk is SATA while DVD is IDE. And i finally found a solution that helped.
I only had to change BIOS IDE mode to native. The difference is that CD is now /dev/hda instead of /dev/hdc.

You can read more about the problem and how to solve it here:
http :// linux-ata.org/faq.html (sorry, it's my first post, so I can't post links yet. Just delete spaces.)

dont_stop_me · 07-10-2007, 03:39 AM

Thanks a lot, this helped. I had problems before with this chipset when i tried to use one ide and one sata harddrive, since I have now only sata works fine.
I have Asus motherboard with intel chipset, my option to enable was: "enhanced mode"
to post a link there is a button in the textbar wich looks like the earth globe