Linux 2.4.9 (and 2.4.8-ac{11,12}) IDE brokenness (and workaround for non-PDC20268R chipsets)

From: Zygo Blaxell (uixjjji1@umail.furryterror.org)
Date: Mon Aug 27 2001 - 13:50:31 EST

On some machines running 2.4.9 and 2.4.8-ac1[12], I get an unending stream of these:

        Aug 27 14:46:39 kasumi kernel: hdh: status error: status=0x58 { DriveReady SeekComplete DataRequest }
        Aug 27 14:46:39 kasumi kernel: hdh: drive not ready for command
        Aug 27 14:46:45 kasumi kernel: hdf: status error: status=0x58 { DriveReady SeekComplete DataRequest }
        Aug 27 14:46:45 kasumi kernel: hdf: drive not ready for command
        Aug 27 14:46:45 kasumi kernel: hdh: status error: status=0x58 { DriveReady SeekComplete DataRequest }
        Aug 27 14:46:45 kasumi kernel: hdh: drive not ready for command

This only seems to happen to some drives or drive/controller combinations.
For disks on PIIX controllers, sometimes the DMA doesn't get turned on at
startup. A simple 'hdparm -d1 /dev/hdc' can fix this.

Unfortunately, this is what happens on a Promise Fasttrak 100 TX2 (PCI device
ID 0x6268):

        root@kasumi:~# hdparm -d1 /dev/hde

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

        root@kasumi:~# cat /proc/ide/pdc202xx

                                        PDC202XX Chipset.
        ------------------------------- General Status ---------------------------------
        Burst Mode : enabled
        Host Mode : Tri-Stated
        Bus Clocking : 100 External
        IO pad select : 10 mA
        Status Polling Period : 15
        Interrupt Check Status Polling Delay : 15
        --------------- Primary Channel ---------------- Secondary Channel -------------
                        enabled enabled
        66 Clocking enabled enabled
                   Mode MASTER Mode MASTER
                        Error Error
        --------------- drive0 --------- drive1 -------- drive0 ---------- drive1 ------
        DMA enabled: no no no no
        DMA Mode: PIO--- PIO--- PIO--- PIO---
        PIO Mode: PIO ? PIO ? PIO ? PIO ?

The drives function perfectly (as far as I can tell, anyway) when I
use a hacked version of 2.4.6 which simply uses the PDC20268 driver
(PCI id 0x4d68) on my PDC20268R card (PCI id 0x6268). 

-- 
Zygo Blaxell (Laptop) <zblaxell@feedme.hungrycats.org>
GPG = D13D 6651 F446 9787 600B AD1E CCF3 6F93 2823 44AD
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This archive was generated by hypermail 2b29 : Fri Aug 31 2001 - 21:00:24 EST