netdev - [PATCH net-next 4/4] gve: update gve.rst

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Message-ID: <20230802213338.2391025-5-rushilg@google.com>
Date: Wed,  2 Aug 2023 21:33:38 +0000
From: Rushil Gupta <rushilg@...gle.com>
To: netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org, 
	willemb@...gle.com, edumazet@...gle.com, pabeni@...hat.com
Cc: Rushil Gupta <rushilg@...gle.com>, Praveen Kaligineedi <pkaligineedi@...gle.com>, 
	Bailey Forrest <bcf@...gle.com>
Subject: [PATCH net-next 4/4] gve: update gve.rst

Add a note about QPL and RDA mode

Signed-off-by: Rushil Gupta <rushilg@...gle.com>
Reviewed-by: Willem de Bruijn <willemb@...gle.com>
Signed-off-by: Praveen Kaligineedi <pkaligineedi@...gle.com>
Signed-off-by: Bailey Forrest <bcf@...gle.com>
---
 .../networking/device_drivers/ethernet/google/gve.rst    | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/networking/device_drivers/ethernet/google/gve.rst b/Documentation/networking/device_drivers/ethernet/google/gve.rst
index 6d73ee78f3d7..31d621bca82e 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.
-- 
2.41.0.585.gd2178a4bd4-goog