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SubjectRe: Silicon Image 3112A SATA trouble
Bartlomiej Zolnierkiewicz wrote:
> On Sunday 30 of November 2003 18:19, Prakash K. Cheemplavam wrote:
>>Bartlomiej Zolnierkiewicz wrote:
>>>In 2.6.x there is no max_kb_per_request setting in
>>>/proc/ide/hdx/settings. Therefore
>>> echo "max_kb_per_request:128" > /proc/ide/hde/settings
>>>does not work.
>>>Hmm. actually I was under influence that we have generic ioctls in 2.6.x,
>>>but I can find only BLKSECTGET, BLKSECTSET was somehow lost. Jens?
>>>Prakash, please try patch and maybe you will have 2 working drivers now
>>OK, this driver fixes the transfer rate problem. Nice, so I wanted to do
>>the right thing, but it didn't work, as you explained... Thanks.
> Cool.
>>Nevertheless there is still the issue left:
>>hdparm -d1 /dev/hde makes the drive get major havoc (something like:
>>ide: dma_intr: status=0x58 { DriveReady, SeekCOmplete, DataRequest}
>>ide status timeout=0xd8{Busy}; messages taken from swsups kernal panic
>>). Have to do a hard reset. I guess it is the same reason why swsusp
>>gets a kernel panic when it sends PM commands to siimage.c. (Mybe the
>>same error is in libata causing the same kernel panic on swsusp.)
>>Any clues?
> Strange. While doing 'hdparm -d1 /dev/hde' the same code path is executed
> which is executed during boot so probably device is in different state or you
> hit some weird driver bug :/.
> And you are right, thats the reason why swsusp panics.

I think the bug is, the driver specifically doesn't like my
controller-sata converter-hd combination. As I stated in my very first
message, on HD access the siimage.c constantly calls:

static int siimage_mmio_ide_dma_test_irq (ide_drive_t *drive)
ide_hwif_t *hwif = HWIF(drive);
unsigned long base = (unsigned long)hwif->hwif_data;
unsigned long addr = siimage_selreg(hwif, 0x1);

u32 ext_stat = hwif->INL(base + 0x10);
u8 watchdog = 0;
if (ext_stat & ((hwif->channel) ? 0x40 : 0x10)) {
// u32 sata_error = hwif->INL(SATA_ERROR_REG);
// hwif->OUTL(sata_error, SATA_ERROR_REG);
// watchdog = (sata_error & 0x00680000) ? 1 : 0;
//#if 1
// printk(KERN_WARNING "%s: sata_error = 0x%08x, "
// "watchdog = %d, %s\n",
// drive->name, sata_error, watchdog,
// __FUNCTION__);

} else {

Thats why I commented above portions out, otherwise my dmesg gets
flooded. What is strange, when I compile the kernel to *not* enable DMA
at boot, the siimage DMA gets enabled nevertheless, so I am not sure
whether hdparm -d1 and kernel boot take the same path to enable DMA. It
seems some sort of hack within siimage.c is used to enable DMA on my
drive. Remember, I have no native SATA drive, maybe thats the problem.


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