[PATCH v3 2/9] doc: add sxe2 guide and release notes

[liujie5 at linkdatatechnology.com]

From: Jie Liu <liujie5 at linkdatatechnology.com>

Add a new guide for SXE2 PMD in the nics directory.
The guide contains driver capabilities, prerequisites,
and compilation/usage instructions.

Update the release notes to announce the addition of the
sxe2 network driver.

Signed-off-by: Jie Liu <liujie5 at linkdatatechnology.com>
---
 doc/guides/nics/features/sxe2.ini      | 11 +++++++++++
 doc/guides/nics/index.rst              |  1 +
 doc/guides/nics/sxe2.rst               | 23 +++++++++++++++++++++++
 doc/guides/rel_notes/release_26_07.rst |  3 +++
 4 files changed, 38 insertions(+)
 create mode 100644 doc/guides/nics/features/sxe2.ini
 create mode 100644 doc/guides/nics/sxe2.rst

diff --git a/doc/guides/nics/features/sxe2.ini b/doc/guides/nics/features/sxe2.ini
new file mode 100644
index 0000000000..cbf5a773fb
--- /dev/null
+++ b/doc/guides/nics/features/sxe2.ini
@@ -0,0 +1,11 @@
+;
+; Supported features of the 'sxe2' network poll mode driver.
+;
+; Refer to default.ini for the full list of available PMD features.
+;
+; A feature with "P" indicates only be supported when non-vector path
+; is selected.
+;
+[Features]
+Queue start/stop     = Y
+Linux                = Y
\ No newline at end of file
diff --git a/doc/guides/nics/index.rst b/doc/guides/nics/index.rst
index cb818284fe..e20be478f8 100644
--- a/doc/guides/nics/index.rst
+++ b/doc/guides/nics/index.rst
@@ -68,6 +68,7 @@ Network Interface Controller Drivers
     rnp
     sfc_efx
     softnic
+    sxe2
     tap
     thunderx
     txgbe
diff --git a/doc/guides/nics/sxe2.rst b/doc/guides/nics/sxe2.rst
new file mode 100644
index 0000000000..2f9ba91c33
--- /dev/null
+++ b/doc/guides/nics/sxe2.rst
@@ -0,0 +1,23 @@
+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright (C), 2025, Wuxi Stars Micro System Technologies Co., Ltd.
+
+SXE2 Poll Mode Driver
+======================
+
+The sxe2 PMD (**librte_net_sxe2**) provides poll mode driver support for
+10/25/50/100/200 Gbps Network Adapters.
+The embedded switch, Physical Functions (PF),
+and SR-IOV Virtual Functions (VF) are supported
+
+Implementation details
+----------------------
+
+For security reasons and robustness, this driver only deals with virtual
+memory addresses. The way resources allocations are handled by the kernel
+combined with hardware specifications that allow it to handle virtual memory
+addresses directly ensure that DPDK applications cannot access random
+physical memory (or memory that does not belong to the current process).
+
+This capability allows the PMD to coexist with kernel network interfaces
+which remain functional, although they stop receiving unicast packets as
+long as they share the same MAC address.
diff --git a/doc/guides/rel_notes/release_26_07.rst b/doc/guides/rel_notes/release_26_07.rst
index 060b26ff61..93fb0072a9 100644
--- a/doc/guides/rel_notes/release_26_07.rst
+++ b/doc/guides/rel_notes/release_26_07.rst
@@ -55,6 +55,9 @@ New Features
      Also, make sure to start the actual text at the margin.
      =======================================================
 
+* **Added Linkdata sxe2 ethernet driver.**
+
+  Added network driver for the Linkdata Network Adapters.
 
 Removed Items
 -------------
-- 
2.47.3