On Tue, 19 Jul 2005 12:20:46 -0700, "Mark Overby" <[EMAIL PROTECTED]> wrote:
> [...] They [affected TDs] are namely the
> Isochronous Transaction Descriptors (iTD) and Split-transaction
> Isochronous Transfer Descriptors (siTD) used in the periodic schedule;
> and Queue Heads (QH) used in the periodic and asynchronous schedules.
> Note that data buffers, Queue Element Transfer Descriptors (qTD), Frame
> Span Traversal Nodes (FSTN) and the Periodic Frame List are not affected
> by this restriction.
Darn, this is very unfortunate, because I saw some bizarre problems on
HP Viper platform with regular storage transfers (over Bulk transport).
But obviously that cannot be it. Oh well. I'll keep looking.
> We would request that this patch be included.
Looks good, but the patch was line-wrapped. How about this (with retval
actually used this time):
diff -urp -X dontdiff linux-2.6.12/drivers/usb/host/ehci-hcd.c
linux-2.6.12-lem/drivers/usb/host/ehci-hcd.c
--- linux-2.6.12/drivers/usb/host/ehci-hcd.c 2005-06-21 12:58:47.000000000
-0700
+++ linux-2.6.12-lem/drivers/usb/host/ehci-hcd.c 2005-07-19
12:43:15.000000000 -0700
@@ -551,6 +551,23 @@ static int ehci_start (struct usb_hcd *h
/* help hc dma work well with cachelines */
pci_set_mwi (pdev);
+
+ /* chip-specific init */
+ switch (pdev->vendor) {
+ case PCI_VENDOR_ID_NVIDIA:
+ switch (pdev->device) {
+ case 0x003c: /* MCP04 */
+ case 0x005b: /* CK804 */
+ case 0x00d8: /* CK8 */
+ case 0x00e8: /* CK8S */
+ /* >2GB Workaround for some of NVIDIA's EHCI
controllers. */
+ if ((retval = pci_set_consistent_dma_mask(pdev,
0x7fffffff)) != 0) {
+ printk(KERN_WARNING "Setting DMA mask
workaround failed (%d). This is harmless unless the system has 2GB or more
RAM.\n", retval);
+ }
+ break;
+ }
+ break;
+ }
}
#endif
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