On Wed, Mar 01 2006, Andy Chittenden wrote:
> Jens
>
> > I guess that definitely doesn't work, then :-)
> > Let me doctor up a quick debug patch for ide-dma, then.
> >
> How's that patch coming along?
Something like this.
diff --git a/drivers/ide/ide-dma.c b/drivers/ide/ide-dma.c
index 0523da7..9ee8c5c 100644
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -221,6 +221,20 @@ int ide_build_sglist(ide_drive_t *drive,
EXPORT_SYMBOL_GPL(ide_build_sglist);
+static void dump_dma_table(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = HWIF(drive);
+ request_queue_t *q = drive->queue;
+ int i;
+
+ printk("ide dma table, %d entries, bounce pfn %lu\n", hwif->sg_nents, q->bounce_pfn);
+ for (i = 0; i < hwif->sg_nents; i++) {
+ struct scatterlist *sg = &hwif->sg_table[i];
+
+ printk("sg%d: dma=%llx, len=%u/%u, pfn=%lu\n", i, (unsigned long long) sg->dma_address, sg->length, sg->offset, page_to_pfn(sg->page));
+ }
+}
+
/**
* ide_build_dmatable - build IDE DMA table
*
@@ -311,6 +325,7 @@ use_pio_instead:
hwif->sg_table,
hwif->sg_nents,
hwif->sg_dma_direction);
+ dump_dma_table(drive);
return 0; /* revert to PIO for this request */
}
--
Jens Axboe
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