[PATCH v2 5/6] crypto/dpaa2_sec: add support for env variables

[Gagandeep Singh <g.singh@nxp.com>]

Allow driver configuration via environment variables as a fallback
when devargs are not provided. After processing devargs (or when
devargs are absent), check DRIVER_STRICT_ORDER and DRIVER_DUMP_MODE
environment variables to set en_loose_ordered and dpaa2_sec_dp_dump.

This lets users configure the driver without modifying EAL arguments,
useful in environments where command-line access is restricted.

Signed-off-by: Gagandeep Singh <g.singh@nxp.com>
---
 doc/guides/cryptodevs/dpaa2_sec.rst         | 12 ++++++++-
 drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c | 27 ++++++++++++++++++---
 2 files changed, 34 insertions(+), 5 deletions(-)

diff --git a/doc/guides/cryptodevs/dpaa2_sec.rst b/doc/guides/cryptodevs/dpaa2_sec.rst
index f95c6282bb..925d3371bf 100644
--- a/doc/guides/cryptodevs/dpaa2_sec.rst
+++ b/doc/guides/cryptodevs/dpaa2_sec.rst
@@ -1,5 +1,5 @@
 ..  SPDX-License-Identifier: BSD-3-Clause
-    Copyright 2016 NXP
+    Copyright 2016,2026 NXP
 
 
 
@@ -188,9 +188,19 @@ along with other useful debugging information like session, queue, descriptor
 data.
 e.g. ``fslmc:dpseci.1,drv_dump_mode=1``
 
+Alternatively, set the environment variable ``drv_dump_mode`` to the desired
+mode value. The environment variable is used as a fallback when the devarg is
+not provided, which is useful in production environments where modifying EAL
+command-line arguments is not practical.
+e.g. ``export drv_dump_mode=1``
+
 Enable strict ordering
 ----------------------
 
 Use dev arg option ``drv_strict_order=1`` to enable strict ordering.
 By default, loose ordering is set for ordered schedule type event.
 e.g. ``fslmc:dpseci.1,drv_strict_order=1``
+
+Alternatively, set the environment variable ``drv_strict_order=1`` to enable
+strict ordering without modifying EAL arguments.
+e.g. ``export drv_strict_order=1``
diff --git a/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c b/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c
index 15152cc5a1..0ff54fb644 100644
--- a/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c
+++ b/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c
@@ -4366,25 +4366,44 @@ check_devargs_handler(const char *key, const char *value,
 static void
 dpaa2_sec_get_devargs(struct rte_cryptodev *cryptodev, const char *key)
 {
+	struct dpaa2_sec_dev_private *internals;
 	struct rte_kvargs *kvlist;
 	struct rte_devargs *devargs;
+	int ret;
+	char *env;
+
+	internals = cryptodev->data->dev_private;
 
 	devargs = cryptodev->device->devargs;
 	if (!devargs)
-		return;
+		goto env_set;
 
 	kvlist = rte_kvargs_parse(devargs->args, NULL);
 	if (!kvlist)
-		return;
+		goto env_set;
 
 	if (!rte_kvargs_count(kvlist, key)) {
 		rte_kvargs_free(kvlist);
-		return;
+		goto env_set;
 	}
 
-	rte_kvargs_process(kvlist, key,
+	ret = rte_kvargs_process(kvlist, key,
 			check_devargs_handler, (void *)cryptodev);
 	rte_kvargs_free(kvlist);
+	if (!ret)
+		return;
+
+env_set:
+	env = getenv(DRIVER_STRICT_ORDER);
+	if (env)
+		internals->en_loose_ordered = !atoi(env);
+
+	env = getenv(DRIVER_DUMP_MODE);
+	if (env) {
+		dpaa2_sec_dp_dump = atoi(env);
+		if (dpaa2_sec_dp_dump > DPAA2_SEC_DP_FULL_DUMP)
+			dpaa2_sec_dp_dump = DPAA2_SEC_DP_FULL_DUMP;
+	}
 }
 
 static int
-- 
2.25.1