[dpdk-dev] [PATCH v3 3/8] i40e: support of setting hash lookup table size

[Helin Zhang]

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

Signed-off-by: Helin Zhang <helin.zhang at intel.com>
---
 lib/librte_ether/rte_ethdev.h     |  3 +++
 lib/librte_pmd_i40e/i40e_ethdev.c | 14 +++++++++++++-
 lib/librte_pmd_i40e/i40e_ethdev.h |  1 +
 3 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index b69a6af..7db08c2 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -430,6 +430,9 @@ struct rte_eth_rss_conf {
 /* Definitions used for redirection table entry size */
 #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 3b75f0f..ef24175 100644
--- a/lib/librte_pmd_i40e/i40e_ethdev.c
+++ b/lib/librte_pmd_i40e/i40e_ethdev.c
@@ -2943,7 +2943,19 @@ 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 1d42cd2..22b693f 100644
--- a/lib/librte_pmd_i40e/i40e_ethdev.h
+++ b/lib/librte_pmd_i40e/i40e_ethdev.h
@@ -246,6 +246,7 @@ 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 */
 };
 
 enum pending_msg {
-- 
1.8.1.4