From: Rushil Gupta <rushilg@google.com>
Date: Fri, 4 Aug 2023 21:34:44 +0000 (+0000)
Subject: gve: update gve.rst
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5a3f8d1231073fc5f0b6f38ab8337d424ba0cfe4;p=linux.git

gve: update gve.rst

Add a note about QPL and RDA mode

Signed-off-by: Rushil Gupta <rushilg@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Praveen Kaligineedi <pkaligineedi@google.com>
Signed-off-by: Bailey Forrest <bcf@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/Documentation/networking/device_drivers/ethernet/google/gve.rst b/Documentation/networking/device_drivers/ethernet/google/gve.rst
index 6d73ee78f3d74..31d621bca82ef 100644
--- a/Documentation/networking/device_drivers/ethernet/google/gve.rst
+++ b/Documentation/networking/device_drivers/ethernet/google/gve.rst
@@ -52,6 +52,15 @@ Descriptor Formats
 GVE supports two descriptor formats: GQI and DQO. These two formats have
 entirely different descriptors, which will be described below.
 
+Addressing Mode
+------------------
+GVE supports two addressing modes: QPL and RDA.
+QPL ("queue-page-list") mode communicates data through a set of
+pre-registered pages.
+
+For RDA ("raw DMA addressing") mode, the set of pages is dynamic.
+Therefore, the packet buffers can be anywhere in guest memory.
+
 Registers
 ---------
 All registers are MMIO.