[dpdk-dev] [PATCH v2 4/6] i40e: support of 'is_command_supported'

[Helin Zhang]

'is_command_supported' is defined for the capability discovery.
Actually it is to check if a command (feature) is supported on
a specific type of NIC port. Now i40e supports below eight
commands. Of cause, more commands can be supported later.
 - RTE_CMD_GET_SYM_HASH_ENABLE_PER_PCTYPE
 - RTE_CMD_SET_SYM_HASH_ENABLE_PER_PCTYPE
 - RTE_CMD_GET_SYM_HASH_ENABLE_PER_PORT
 - RTE_CMD_SET_SYM_HASH_ENABLE_PER_PORT
 - RTE_CMD_GET_FILTER_SWAP
 - RTE_CMD_SET_FILTER_SWAP
 - RTE_CMD_GET_HASH_FUNCTION
 - RTE_CMD_SET_HASH_FUNCTION

Signed-off-by: Helin Zhang <helin.zhang at intel.com>
---
 lib/librte_pmd_i40e/i40e_ethdev.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/lib/librte_pmd_i40e/i40e_ethdev.c 
b/lib/librte_pmd_i40e/i40e_ethdev.c
index 4403af4..87a4999 100644
--- a/lib/librte_pmd_i40e/i40e_ethdev.c
+++ b/lib/librte_pmd_i40e/i40e_ethdev.c
@@ -204,6 +204,8 @@ static int i40e_dev_rss_hash_update(struct rte_eth_dev *dev,
                                    struct rte_eth_rss_conf *rss_conf);
 static int i40e_dev_rss_hash_conf_get(struct rte_eth_dev *dev,
                                      struct rte_eth_rss_conf *rss_conf);
+static int i40e_dev_is_command_supported(struct rte_eth_dev *dev __rte_unused,
+                                        enum rte_eth_command cmd);
 static int i40e_rx_classification_filter_ctl(struct rte_eth_dev *dev,
                                             enum rte_eth_command cmd,
                                             void *args);
@@ -252,6 +254,7 @@ static struct eth_dev_ops i40e_eth_dev_ops = {
        .reta_query                   = i40e_dev_rss_reta_query,
        .rss_hash_update              = i40e_dev_rss_hash_update,
        .rss_hash_conf_get            = i40e_dev_rss_hash_conf_get,
+       .is_command_supported         = i40e_dev_is_command_supported,
        .rx_classification_filter_ctl = i40e_rx_classification_filter_ctl,
 };

@@ -4292,6 +4295,31 @@ i40e_get_hash_function(struct i40e_hw *hw, enum 
rte_i40e_hash_function *hf)
 }

 static int
+i40e_dev_is_command_supported(struct rte_eth_dev *dev __rte_unused,
+                             enum rte_eth_command cmd)
+{
+       uint32_t i;
+       /* Below commands defined in rte_eth_features.h are for i40e only */
+       static const enum rte_eth_command i40e_commands[] = {
+               RTE_CMD_GET_SYM_HASH_ENABLE_PER_PCTYPE,
+               RTE_CMD_SET_SYM_HASH_ENABLE_PER_PCTYPE,
+               RTE_CMD_GET_SYM_HASH_ENABLE_PER_PORT,
+               RTE_CMD_SET_SYM_HASH_ENABLE_PER_PORT,
+               RTE_CMD_GET_FILTER_SWAP,
+               RTE_CMD_SET_FILTER_SWAP,
+               RTE_CMD_GET_HASH_FUNCTION,
+               RTE_CMD_SET_HASH_FUNCTION,
+       };
+
+       for (i = 0; i < RTE_DIM(i40e_commands); i++) {
+               if (i40e_commands[i] == cmd)
+                       return 1;
+       }
+
+       return 0;
+}
+
+static int
 i40e_rx_classification_filter_ctl(struct rte_eth_dev *dev,
                                  enum rte_eth_command cmd,
                                  void *args)
-- 
1.8.1.4