[PATCH net-next v1] iou-zcrx: update documentation

[David Wei <dw@davidwei.uk>]

Update io_uring zc rx documentation with:

* Current supported NICs with minimum FW reqs
* Mellanox needs HW GRO explicitly enabled

Signed-off-by: David Wei <dw@davidwei.uk>
---
 Documentation/networking/iou-zcrx.rst | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/networking/iou-zcrx.rst b/Documentation/networking/iou-zcrx.rst
index 0127319b30bb..bfc08154e697 100644
--- a/Documentation/networking/iou-zcrx.rst
+++ b/Documentation/networking/iou-zcrx.rst
@@ -41,6 +41,16 @@ RSS
 In addition to flow steering above, RSS is required to steer all other non-zero
 copy flows away from queues that are configured for io_uring ZC Rx.
 
+Supported NICs
+==============
+
+Zero copy Rx currently support two NIC families:
+
+* Broadcom Thor (BCM95750x) family
+  * Minimum FW is 232
+* Mellanox ConnectX-7 (MT2910) family
+  * Minimum FW is 28.42
+
 Usage
 =====
 
@@ -57,6 +67,10 @@ Enable header/data split::
 
   ethtool -G eth0 tcp-data-split on
 
+Enable HW GRO (for Mellanox NICs)::
+
+  ethtool -K eth0 rx-gro-hw on
+
 Carve out half of the HW Rx queues for zero copy using RSS::
 
   ethtool -X eth0 equal 1
-- 
2.47.3