i40e: support setting hash lookup table size

Add support of setting hash lookup table size according
to the hardawre capability.

Signed-off-by: Helin Zhang <helin.zhang@intel.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index c29525b..2c8f129 100644 (file)
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -443,9 +443,16 @@ struct rte_eth_rss_conf {
                ETH_RSS_FRAG_IPV6 | \
                ETH_RSS_L2_PAYLOAD)
 
-/* Definitions used for redirection table entry size */
+/*
+ * Definitions used for redirection table entry size.
+ * Some RSS RETA sizes may not be supported by some drivers, check the
+ * documentation or the description of relevant functions for more details.
+ */
 #define ETH_RSS_RETA_NUM_ENTRIES 128
 #define ETH_RSS_RETA_MAX_QUEUE   16
+#define ETH_RSS_RETA_SIZE_64  64
+#define ETH_RSS_RETA_SIZE_128 128
+#define ETH_RSS_RETA_SIZE_512 512
 
 /* Definitions used for VMDQ and DCB functionality */
 #define ETH_VMDQ_MAX_VLAN_FILTERS   64 /**< Maximum nb. of VMDQ vlan filters. */

diff --git a/lib/librte_pmd_i40e/i40e_ethdev.c b/lib/librte_pmd_i40e/i40e_ethdev.c
index 5074262..d90718e 100644 (file)
--- a/lib/librte_pmd_i40e/i40e_ethdev.c
+++ b/lib/librte_pmd_i40e/i40e_ethdev.c
@@ -3195,7 +3195,19 @@ i40e_pf_setup(struct i40e_pf *pf)
 
        /* Configure filter control */
        memset(&settings, 0, sizeof(settings));
-       settings.hash_lut_size = I40E_HASH_LUT_SIZE_128;
+       if (hw->func_caps.rss_table_size == ETH_RSS_RETA_SIZE_128)
+               settings.hash_lut_size = I40E_HASH_LUT_SIZE_128;
+       else if (hw->func_caps.rss_table_size == ETH_RSS_RETA_SIZE_512)
+               settings.hash_lut_size = I40E_HASH_LUT_SIZE_512;
+       else {
+               PMD_DRV_LOG(ERR, "Hash lookup table size (%u) not supported\n",
+                                               hw->func_caps.rss_table_size);
+               return I40E_ERR_PARAM;
+       }
+       PMD_DRV_LOG(INFO, "Hardware capability of hash lookup table "
+                       "size: %u\n", hw->func_caps.rss_table_size);
+       pf->hash_lut_size = hw->func_caps.rss_table_size;
+
        /* Enable ethtype and macvlan filters */
        settings.enable_ethtype = TRUE;
        settings.enable_macvlan = TRUE;

diff --git a/lib/librte_pmd_i40e/i40e_ethdev.h b/lib/librte_pmd_i40e/i40e_ethdev.h
index 96361c2..c7ad384 100644 (file)
--- a/lib/librte_pmd_i40e/i40e_ethdev.h
+++ b/lib/librte_pmd_i40e/i40e_ethdev.h
@@ -270,6 +270,7 @@ struct i40e_pf {
        uint16_t vmdq_nb_qps; /* The number of queue pairs of VMDq */
        uint16_t vf_nb_qps; /* The number of queue pairs of VF */
        uint16_t fdir_nb_qps; /* The number of queue pairs of Flow Director */
+       uint16_t hash_lut_size; /* The size of hash lookup table */
 
        /* store VXLAN UDP ports */
        uint16_t vxlan_ports[I40E_MAX_PF_UDP_OFFLOAD_PORTS];