From: jobhunts02@xxxxxxx [mailto:jobhunts02@xxxxxxx] Sent: Friday, May 06, 2011 6:23 PM To: Hargrave, Jordan Cc: <linux-pci@xxxxxxxxxxxxxxx> Subject: Re: PCI Express Max Payload Size On May 6, 2011, at 3:11 PM, <Jordan_Hargrave@xxxxxxxx> wrote: -----Original Message----- From: linux-pci-owner@xxxxxxxxxxxxxxx [mailto:linux-pci- owner@xxxxxxxxxxxxxxx] On Behalf Of jobhunts02@xxxxxxx Sent: Friday, May 06, 2011 4:27 PM To: linux-pci@xxxxxxxxxxxxxxx Subject: PCI Express Max Payload Size If both sides of the link have a maximum payload size of 256 bytes, why wouldn't the maximum payload size supported after the PCI bus scan be 256 bytes? I am running Linux 2.6.32 on a P2020. -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at Âhttp://vger.kernel.org/majordomo-info.html When hotplugging a pci device, it will default to 128 after the bus scan. ÂIf the parent is set to 256, there will be PCI errors generated when trying to do I/O to/from the card. --jordan hargrave Dell Enterprise Linux Engineering I am not hotplugging the pci device. ======================================== If you are not hotplugging, the BIOS should have already setup the correct maxpayload and this code won't do anything. --jordan hargrave Dell Enterprise Linux Engineering ÿô.nlj·Ÿ®‰†+%ŠË±é¥Šwÿº{.nlj·¥Š{±þ—"þ)íè jg¬±¨ ¶‰šŽŠÝjÿ¾«þG«é¸ ¢·¦j:+v‰¨Šwèm¶Ÿÿþø®w¥þŠà£¢·hšâÿ†Ù
