[dpdk-dev] [PATCH v2 20/37] net/txgbe: add RSS filter restore operation

[Jiawen Wu <jiawenwu@trustnetic.com>]

Add restore operation on RSS filter.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
---
 drivers/net/txgbe/txgbe_ethdev.c | 12 +++++
 drivers/net/txgbe/txgbe_ethdev.h |  7 +++
 drivers/net/txgbe/txgbe_rxtx.c   | 76 ++++++++++++++++++++++++++++++++
 3 files changed, 95 insertions(+)

diff --git a/drivers/net/txgbe/txgbe_ethdev.c b/drivers/net/txgbe/txgbe_ethdev.c
index 32c4b15c1..2983b63a2 100644
--- a/drivers/net/txgbe/txgbe_ethdev.c
+++ b/drivers/net/txgbe/txgbe_ethdev.c
@@ -4887,6 +4887,17 @@ txgbe_l2_tn_filter_restore(struct rte_eth_dev *dev)
 	}
 }
 
+/* restore rss filter */
+static inline void
+txgbe_rss_filter_restore(struct rte_eth_dev *dev)
+{
+	struct txgbe_filter_info *filter_info = TXGBE_DEV_FILTER(dev);
+
+	if (filter_info->rss_info.conf.queue_num)
+		txgbe_config_rss_filter(dev,
+			&filter_info->rss_info, TRUE);
+}
+
 static int
 txgbe_filter_restore(struct rte_eth_dev *dev)
 {
@@ -4895,6 +4906,7 @@ txgbe_filter_restore(struct rte_eth_dev *dev)
 	txgbe_syn_filter_restore(dev);
 	txgbe_fdir_filter_restore(dev);
 	txgbe_l2_tn_filter_restore(dev);
+	txgbe_rss_filter_restore(dev);
 
 	return 0;
 }
diff --git a/drivers/net/txgbe/txgbe_ethdev.h b/drivers/net/txgbe/txgbe_ethdev.h
index 80587b245..b8fc605a7 100644
--- a/drivers/net/txgbe/txgbe_ethdev.h
+++ b/drivers/net/txgbe/txgbe_ethdev.h
@@ -237,6 +237,8 @@ struct txgbe_filter_info {
 	struct txgbe_5tuple_filter_list fivetuple_list;
 	/* store the SYN filter info */
 	uint32_t syn_info;
+	/* store the rss filter info */
+	struct txgbe_rte_flow_rss_conf rss_info;
 };
 
 struct txgbe_l2_tn_key {
@@ -487,6 +489,11 @@ int txgbe_set_queue_rate_limit(struct rte_eth_dev *dev, uint16_t queue_idx,
 			       uint16_t tx_rate);
 int txgbe_rss_conf_init(struct txgbe_rte_flow_rss_conf *out,
 			const struct rte_flow_action_rss *in);
+int txgbe_action_rss_same(const struct rte_flow_action_rss *comp,
+			  const struct rte_flow_action_rss *with);
+int txgbe_config_rss_filter(struct rte_eth_dev *dev,
+		struct txgbe_rte_flow_rss_conf *conf, bool add);
+
 static inline int
 txgbe_ethertype_filter_lookup(struct txgbe_filter_info *filter_info,
 			      uint16_t ethertype)
diff --git a/drivers/net/txgbe/txgbe_rxtx.c b/drivers/net/txgbe/txgbe_rxtx.c
index 5f212ffc3..209660656 100644
--- a/drivers/net/txgbe/txgbe_rxtx.c
+++ b/drivers/net/txgbe/txgbe_rxtx.c
@@ -4653,3 +4653,79 @@ txgbe_rss_conf_init(struct txgbe_rte_flow_rss_conf *out,
 	return 0;
 }
 
+int
+txgbe_action_rss_same(const struct rte_flow_action_rss *comp,
+		      const struct rte_flow_action_rss *with)
+{
+	return (comp->func == with->func &&
+		comp->level == with->level &&
+		comp->types == with->types &&
+		comp->key_len == with->key_len &&
+		comp->queue_num == with->queue_num &&
+		!memcmp(comp->key, with->key, with->key_len) &&
+		!memcmp(comp->queue, with->queue,
+			sizeof(*with->queue) * with->queue_num));
+}
+
+int
+txgbe_config_rss_filter(struct rte_eth_dev *dev,
+		struct txgbe_rte_flow_rss_conf *conf, bool add)
+{
+	struct txgbe_hw *hw;
+	uint32_t reta;
+	uint16_t i;
+	uint16_t j;
+	struct rte_eth_rss_conf rss_conf = {
+		.rss_key = conf->conf.key_len ?
+			(void *)(uintptr_t)conf->conf.key : NULL,
+		.rss_key_len = conf->conf.key_len,
+		.rss_hf = conf->conf.types,
+	};
+	struct txgbe_filter_info *filter_info = TXGBE_DEV_FILTER(dev);
+
+	PMD_INIT_FUNC_TRACE();
+	hw = TXGBE_DEV_HW(dev);
+
+	if (!add) {
+		if (txgbe_action_rss_same(&filter_info->rss_info.conf,
+					  &conf->conf)) {
+			txgbe_rss_disable(dev);
+			memset(&filter_info->rss_info, 0,
+				sizeof(struct txgbe_rte_flow_rss_conf));
+			return 0;
+		}
+		return -EINVAL;
+	}
+
+	if (filter_info->rss_info.conf.queue_num)
+		return -EINVAL;
+	/* Fill in redirection table
+	 * The byte-swap is needed because NIC registers are in
+	 * little-endian order.
+	 */
+	reta = 0;
+	for (i = 0, j = 0; i < ETH_RSS_RETA_SIZE_128; i++, j++) {
+		if (j == conf->conf.queue_num)
+			j = 0;
+		reta = (reta >> 8) | LS32(conf->conf.queue[j], 24, 0xFF);
+		if ((i & 3) == 3)
+			wr32a(hw, TXGBE_REG_RSSTBL, i >> 2, reta);
+	}
+
+	/* Configure the RSS key and the RSS protocols used to compute
+	 * the RSS hash of input packets.
+	 */
+	if ((rss_conf.rss_hf & TXGBE_RSS_OFFLOAD_ALL) == 0) {
+		txgbe_rss_disable(dev);
+		return 0;
+	}
+	if (rss_conf.rss_key == NULL)
+		rss_conf.rss_key = rss_intel_key; /* Default hash key */
+	txgbe_dev_rss_hash_update(dev, &rss_conf);
+
+	if (txgbe_rss_conf_init(&filter_info->rss_info, &conf->conf))
+		return -EINVAL;
+
+	return 0;
+}
+
-- 
2.18.4