[PATCH v2 1/3] cmd: pci: Add command to set MPS of all PCIe devices

Tom Rini trini at konsulko.com
Fri Mar 31 16:16:41 CEST 2023

On Fri, Mar 10, 2023 at 11:07:13AM -0800, stcarlso at linux.microsoft.com wrote:

> From: Stephen Carlson <stcarlso at linux.microsoft.com>
> Enable tuning of the PCI Express MPS (Maximum Payload Size) of
> each device. The Maximum Read Request Size is not altered.
> The SAFE method uses the largest MPS value supported by all devices in the
> system for each device. This method is the same algorithm as used by Linux
> pci=pcie_bus_safe.
> The PEER2PEER method sets all devices to the minimal (128 byte) MPS, which
> allows hot plug of devices later that might only support the minimum size,
> and ensures compatibility of DMA between two devices on the bus.
> Signed-off-by: Stephen Carlson <stcarlso at linux.microsoft.com>

Applied to u-boot/next, thanks!

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