[dpdk-dev] [PATCH 1/4] net/ice: add devargs to control pipeline mode

[Ying Wang <ying.a.wang@intel.com>]

From: Qiming Yang <qiming.yang@intel.com>

Added a devarg to control the mode in generic flow API.
We use none-pipeline mode by default.

Signed-off-by: Qiming Yang <qiming.yang@intel.com>
---
 doc/guides/nics/ice.rst      | 11 +++++++++++
 drivers/net/ice/ice_ethdev.c | 16 +++++++++++++++-
 drivers/net/ice/ice_ethdev.h |  1 +
 3 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/doc/guides/nics/ice.rst b/doc/guides/nics/ice.rst
index 03819d29f..a8429a535 100644
--- a/doc/guides/nics/ice.rst
+++ b/doc/guides/nics/ice.rst
@@ -61,6 +61,17 @@ Runtime Config Options
   NOTE: In Safe mode, only very limited features are available, features like RSS,
   checksum, fdir, tunneling ... are all disabled.
 
+- ``Generic Flow Pipeline Mode Support`` (default ``0``)
+
+  In pipeline mode, a flow can be setted at one specific stage by setting parameter
+  ``priority``. Currently, we support two stages, priority 0 for permission and 1 for
+  distributor. For none-pipeline mode, all flows are assumed to be at the same pipeline
+  stage, priority is ignored. Default, generic flow API is enabled in none pipeline mode,
+  user can choose to use pipeline mode by set ``devargs`` parameter ``pipeline-mode-support``,
+  for example::
+
+   -w 80:00.0, pipleline-mode-support=1
+
 Driver compilation and testing
 ------------------------------
 
diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
index 9aa7506ba..4e0645db1 100644
--- a/drivers/net/ice/ice_ethdev.c
+++ b/drivers/net/ice/ice_ethdev.c
@@ -19,9 +19,11 @@
 
 /* devargs */
 #define ICE_SAFE_MODE_SUPPORT_ARG "safe-mode-support"
+#define ICE_PIPELINE_MODE_SUPPORT_ARG  "pipeline-mode-support"
 
 static const char * const ice_valid_args[] = {
 	ICE_SAFE_MODE_SUPPORT_ARG,
+	ICE_PIPELINE_MODE_SUPPORT_ARG,
 	NULL
 };
 
@@ -1510,7 +1512,18 @@ static int ice_parse_devargs(struct rte_eth_dev *dev)
 
 	ret = rte_kvargs_process(kvlist, ICE_SAFE_MODE_SUPPORT_ARG,
 				 &parse_bool, &ad->devargs.safe_mode_support);
+	if (ret)
+		goto err_devargs;
+
+	ret = rte_kvargs_process(kvlist, ICE_PIPELINE_MODE_SUPPORT_ARG,
+				 &parse_bool, &ad->devargs.pipeline_mode_support);
+	if (ret)
+		goto err_devargs;
+
+	rte_kvargs_free(kvlist);
+	return ret;
 
+err_devargs:
 	rte_kvargs_free(kvlist);
 	return ret;
 }
@@ -3925,7 +3938,8 @@ RTE_PMD_REGISTER_PCI(net_ice, rte_ice_pmd);
 RTE_PMD_REGISTER_PCI_TABLE(net_ice, pci_id_ice_map);
 RTE_PMD_REGISTER_KMOD_DEP(net_ice, "* igb_uio | uio_pci_generic | vfio-pci");
 RTE_PMD_REGISTER_PARAM_STRING(net_ice,
-			      ICE_SAFE_MODE_SUPPORT_ARG "=<0|1>");
+			ICE_SAFE_MODE_SUPPORT_ARG "=<0|1>"
+			ICE_PIPELINE_MODE_SUPPORT_ARG "=<0|1>");
 
 RTE_INIT(ice_init_log)
 {
diff --git a/drivers/net/ice/ice_ethdev.h b/drivers/net/ice/ice_ethdev.h
index 926db23d2..9bf5de08d 100644
--- a/drivers/net/ice/ice_ethdev.h
+++ b/drivers/net/ice/ice_ethdev.h
@@ -285,6 +285,7 @@ struct ice_pf {
  */
 struct ice_devargs {
 	int safe_mode_support;
+	int pipeline_mode_support;
 };
 
 /**
-- 
2.15.1