Messages in this thread | | | Subject | problem changing DMA on SiImage680 | From | Pallai Roland <> | Date | 19 Sep 2003 00:09:01 +0200 |
| |
I've reported earlier that the CMD649 chipset locks up the entire machine when the kernel tries to change DMA on a channel where's active transfer going on.. now, I've been tried it with a SiI680 card, the result is better, but still sad: just the card freezes up, the system stays alive and the four drives become offline..
is it sure that a good idea to play with DMA if an error occurs? it would be much better to get an I/O error instead of this lockups and card freezes for me.. so can I disable this 'feature' easily with a little hack? I think it's not too hard, so could you help me with a hint, please?
the test:
console 1: # dd if=/dev/hdf of=/dev/null bs=4k
console 2: # hdparm -d0 /dev/hde hde: set_drive_speed_status: status=0xd0 { Busy } hde: set_drive_speed_status: status=0xff { Busy } hde: DMA disabled hdf: dma_timer_expiry: dma status == 0x40 hdf: timeout waiting for DMA hdf: timeout waiting for DMA hdf: status timeout: status=0xff { Busy }
hdf: drive not ready for command ide2: reset timed-out, status=0xff hdf: status timeout: status=0xff { Busy }
hdf: drive not ready for command ide2: reset timed-out, status=0xff blk: queue c0479690, I/O limit 4095Mb (mask 0xffffffff) end_request: I/O error, dev 21:40 (hdf), sector 166920 [...]
configuration: uname -a: Linux dap 2.4.22 #5 SMP Thu Sep 18 22:38:56 CEST 2003 i686 unknown
lspci -vvvv: [...] 00:0d.0 RAID bus controller: CMD Technology Inc: Unknown device 0680 (rev 02) Subsystem: CMD Technology Inc: Unknown device 3680 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort+ <TAbort- <MAbort- >SERR- <PERR- Latency: 32, cache line size 01 Interrupt: pin A routed to IRQ 10 Region 0: I/O ports at d000 [size=8] Region 1: I/O ports at d400 [size=4] Region 2: I/O ports at d800 [size=8] Region 3: I/O ports at dc00 [size=4] Region 4: I/O ports at e000 [size=16] Region 5: Memory at ef100000 (32-bit, non-prefetchable) [size=256] Expansion ROM at <unassigned> [disabled] [size=512K] Capabilities: [60] Power Management version 2 Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=2 PME- [...]
drives (but seems like it's doesn't matter): hde: ST31720A, ATA DISK drive hdf: Maxtor 90650U2, ATA DISK drive hde: 3329424 sectors (1705 MB), CHS=3303/16/63, DMA hdf: 12594960 sectors (6449 MB) w/2048KiB Cache, CHS=12495/16/63, UDMA(66)
tia, -- DaP - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |