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authorNelio Laranjeiro <nelio.laranjeiro@6wind.com>2015-11-02 19:11:57 +0100
committerThomas Monjalon <thomas.monjalon@6wind.com>2015-11-03 11:23:15 +0100
commit634efbc2c8c05213696c36e103becc48cdbe534c (patch)
tree31d8e84bfa34765178badc5c71da42559e2aa431 /drivers/net/mlx5/mlx5_rss.c
parent647d1eaf758b97311ab3692770acac72144eea87 (diff)
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mlx5: support RETA query and update
ConnectX-4 adapters do not have a constant indirection table size, which is set at runtime from the number of RX queues. The maximum size is retrieved using a hardware query and is normally 512. Since the current RETA API cannot handle a variable size, any query/update command causes it to be silently updated to RSS_INDIRECTION_TABLE_SIZE entries regardless of the original size. Also due to the underlying type of the configuration structure, the maximum size is limited to RSS_INDIRECTION_TABLE_SIZE (currently 128, at most 256 entries). A port stop/start must be done to apply the new RETA configuration. Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
Diffstat (limited to 'drivers/net/mlx5/mlx5_rss.c')
-rw-r--r--drivers/net/mlx5/mlx5_rss.c163
1 files changed, 163 insertions, 0 deletions
diff --git a/drivers/net/mlx5/mlx5_rss.c b/drivers/net/mlx5/mlx5_rss.c
index bf19aca..7eb688a 100644
--- a/drivers/net/mlx5/mlx5_rss.c
+++ b/drivers/net/mlx5/mlx5_rss.c
@@ -211,3 +211,166 @@ mlx5_rss_hash_conf_get(struct rte_eth_dev *dev,
priv_unlock(priv);
return 0;
}
+
+/**
+ * Allocate/reallocate RETA index table.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @praram reta_size
+ * The size of the array to allocate.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+int
+priv_rss_reta_index_resize(struct priv *priv, unsigned int reta_size)
+{
+ void *mem;
+ unsigned int old_size = priv->reta_idx_n;
+
+ if (priv->reta_idx_n == reta_size)
+ return 0;
+
+ mem = rte_realloc(priv->reta_idx,
+ reta_size * sizeof((*priv->reta_idx)[0]), 0);
+ if (!mem)
+ return ENOMEM;
+ priv->reta_idx = mem;
+ priv->reta_idx_n = reta_size;
+
+ if (old_size < reta_size)
+ memset(&(*priv->reta_idx)[old_size], 0,
+ (reta_size - old_size) *
+ sizeof((*priv->reta_idx)[0]));
+ return 0;
+}
+
+/**
+ * Query RETA table.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param[in, out] reta_conf
+ * Pointer to the first RETA configuration structure.
+ * @param reta_size
+ * Number of entries.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+priv_dev_rss_reta_query(struct priv *priv,
+ struct rte_eth_rss_reta_entry64 *reta_conf,
+ unsigned int reta_size)
+{
+ unsigned int idx;
+ unsigned int i;
+ int ret;
+
+ /* See RETA comment in mlx5_dev_infos_get(). */
+ ret = priv_rss_reta_index_resize(priv, priv->ind_table_max_size);
+ if (ret)
+ return ret;
+
+ /* Fill each entry of the table even if its bit is not set. */
+ for (idx = 0, i = 0; (i != reta_size); ++i) {
+ idx = i / RTE_RETA_GROUP_SIZE;
+ reta_conf[idx].reta[i % RTE_RETA_GROUP_SIZE] =
+ (*priv->reta_idx)[i];
+ }
+ return 0;
+}
+
+/**
+ * Update RETA table.
+ *
+ * @param priv
+ * Pointer to private structure.
+ * @param[in] reta_conf
+ * Pointer to the first RETA configuration structure.
+ * @param reta_size
+ * Number of entries.
+ *
+ * @return
+ * 0 on success, errno value on failure.
+ */
+static int
+priv_dev_rss_reta_update(struct priv *priv,
+ struct rte_eth_rss_reta_entry64 *reta_conf,
+ unsigned int reta_size)
+{
+ unsigned int idx;
+ unsigned int i;
+ unsigned int pos;
+ int ret;
+
+ /* See RETA comment in mlx5_dev_infos_get(). */
+ ret = priv_rss_reta_index_resize(priv, priv->ind_table_max_size);
+ if (ret)
+ return ret;
+
+ for (idx = 0, i = 0; (i != reta_size); ++i) {
+ idx = i / RTE_RETA_GROUP_SIZE;
+ pos = i % RTE_RETA_GROUP_SIZE;
+ if (((reta_conf[idx].mask >> i) & 0x1) == 0)
+ continue;
+ assert(reta_conf[idx].reta[pos] < priv->rxqs_n);
+ (*priv->reta_idx)[i] = reta_conf[idx].reta[pos];
+ }
+ return 0;
+}
+
+/**
+ * DPDK callback to get the RETA indirection table.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param reta_conf
+ * Pointer to RETA configuration structure array.
+ * @param reta_size
+ * Size of the RETA table.
+ *
+ * @return
+ * 0 on success, negative errno value on failure.
+ */
+int
+mlx5_dev_rss_reta_query(struct rte_eth_dev *dev,
+ struct rte_eth_rss_reta_entry64 *reta_conf,
+ uint16_t reta_size)
+{
+ int ret;
+ struct priv *priv = dev->data->dev_private;
+
+ priv_lock(priv);
+ ret = priv_dev_rss_reta_query(priv, reta_conf, reta_size);
+ priv_unlock(priv);
+ return -ret;
+}
+
+/**
+ * DPDK callback to update the RETA indirection table.
+ *
+ * @param dev
+ * Pointer to Ethernet device structure.
+ * @param reta_conf
+ * Pointer to RETA configuration structure array.
+ * @param reta_size
+ * Size of the RETA table.
+ *
+ * @return
+ * 0 on success, negative errno value on failure.
+ */
+int
+mlx5_dev_rss_reta_update(struct rte_eth_dev *dev,
+ struct rte_eth_rss_reta_entry64 *reta_conf,
+ uint16_t reta_size)
+{
+ int ret;
+ struct priv *priv = dev->data->dev_private;
+
+ priv_lock(priv);
+ ret = priv_dev_rss_reta_update(priv, reta_conf, reta_size);
+ priv_unlock(priv);
+ return -ret;
+}