[dpdk-dev] [PATCH v2 19/37] net/txgbe: add RSS filter parse rule

[Jiawen Wu <jiawenwu@trustnetic.com>]

Add support to parse flow for RSS filter.

Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
---
 drivers/net/txgbe/txgbe_ethdev.h |   8 +++
 drivers/net/txgbe/txgbe_flow.c   | 114 +++++++++++++++++++++++++++++++
 drivers/net/txgbe/txgbe_rxtx.c   |  20 ++++++
 3 files changed, 142 insertions(+)

diff --git a/drivers/net/txgbe/txgbe_ethdev.h b/drivers/net/txgbe/txgbe_ethdev.h
index 47b095e4f..80587b245 100644
--- a/drivers/net/txgbe/txgbe_ethdev.h
+++ b/drivers/net/txgbe/txgbe_ethdev.h
@@ -121,6 +121,12 @@ struct txgbe_hw_fdir_info {
 	bool mask_added; /* If already got mask from consistent filter */
 };
 
+struct txgbe_rte_flow_rss_conf {
+	struct rte_flow_action_rss conf; /**< RSS parameters. */
+	uint8_t key[TXGBE_HKEY_MAX_INDEX * sizeof(uint32_t)]; /* Hash key. */
+	uint16_t queue[TXGBE_MAX_RX_QUEUE_NUM]; /**< Queues indices to use. */
+};
+
 /* structure for interrupt relative data */
 struct txgbe_interrupt {
 	uint32_t flags;
@@ -479,6 +485,8 @@ int txgbe_set_vf_rate_limit(struct rte_eth_dev *dev, uint16_t vf,
 			    uint16_t tx_rate, uint64_t q_msk);
 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);
 static inline int
 txgbe_ethertype_filter_lookup(struct txgbe_filter_info *filter_info,
 			      uint16_t ethertype)
diff --git a/drivers/net/txgbe/txgbe_flow.c b/drivers/net/txgbe/txgbe_flow.c
index b7d0e08a9..0d90ef33a 100644
--- a/drivers/net/txgbe/txgbe_flow.c
+++ b/drivers/net/txgbe/txgbe_flow.c
@@ -2388,3 +2388,117 @@ txgbe_parse_fdir_filter(struct rte_eth_dev *dev,
 	return ret;
 }
 
+static int
+txgbe_parse_rss_filter(struct rte_eth_dev *dev,
+			const struct rte_flow_attr *attr,
+			const struct rte_flow_action actions[],
+			struct txgbe_rte_flow_rss_conf *rss_conf,
+			struct rte_flow_error *error)
+{
+	const struct rte_flow_action *act;
+	const struct rte_flow_action_rss *rss;
+	uint16_t n;
+
+	/**
+	 * rss only supports forwarding,
+	 * check if the first not void action is RSS.
+	 */
+	act = next_no_void_action(actions, NULL);
+	if (act->type != RTE_FLOW_ACTION_TYPE_RSS) {
+		memset(rss_conf, 0, sizeof(struct txgbe_rte_flow_rss_conf));
+		rte_flow_error_set(error, EINVAL,
+			RTE_FLOW_ERROR_TYPE_ACTION,
+			act, "Not supported action.");
+		return -rte_errno;
+	}
+
+	rss = (const struct rte_flow_action_rss *)act->conf;
+
+	if (!rss || !rss->queue_num) {
+		rte_flow_error_set(error, EINVAL,
+				RTE_FLOW_ERROR_TYPE_ACTION,
+				act,
+			   "no valid queues");
+		return -rte_errno;
+	}
+
+	for (n = 0; n < rss->queue_num; n++) {
+		if (rss->queue[n] >= dev->data->nb_rx_queues) {
+			rte_flow_error_set(error, EINVAL,
+				   RTE_FLOW_ERROR_TYPE_ACTION,
+				   act,
+				   "queue id > max number of queues");
+			return -rte_errno;
+		}
+	}
+
+	if (rss->func != RTE_ETH_HASH_FUNCTION_DEFAULT)
+		return rte_flow_error_set
+			(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION, act,
+			 "non-default RSS hash functions are not supported");
+	if (rss->level)
+		return rte_flow_error_set
+			(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION, act,
+			 "a nonzero RSS encapsulation level is not supported");
+	if (rss->key_len && rss->key_len != RTE_DIM(rss_conf->key))
+		return rte_flow_error_set
+			(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION, act,
+			 "RSS hash key must be exactly 40 bytes");
+	if (rss->queue_num > RTE_DIM(rss_conf->queue))
+		return rte_flow_error_set
+			(error, ENOTSUP, RTE_FLOW_ERROR_TYPE_ACTION, act,
+			 "too many queues for RSS context");
+	if (txgbe_rss_conf_init(rss_conf, rss))
+		return rte_flow_error_set
+			(error, EINVAL, RTE_FLOW_ERROR_TYPE_ACTION, act,
+			 "RSS context initialization failure");
+
+	/* check if the next not void item is END */
+	act = next_no_void_action(actions, act);
+	if (act->type != RTE_FLOW_ACTION_TYPE_END) {
+		memset(rss_conf, 0, sizeof(struct rte_eth_rss_conf));
+		rte_flow_error_set(error, EINVAL,
+			RTE_FLOW_ERROR_TYPE_ACTION,
+			act, "Not supported action.");
+		return -rte_errno;
+	}
+
+	/* parse attr */
+	/* must be input direction */
+	if (!attr->ingress) {
+		memset(rss_conf, 0, sizeof(struct txgbe_rte_flow_rss_conf));
+		rte_flow_error_set(error, EINVAL,
+				   RTE_FLOW_ERROR_TYPE_ATTR_INGRESS,
+				   attr, "Only support ingress.");
+		return -rte_errno;
+	}
+
+	/* not supported */
+	if (attr->egress) {
+		memset(rss_conf, 0, sizeof(struct txgbe_rte_flow_rss_conf));
+		rte_flow_error_set(error, EINVAL,
+				   RTE_FLOW_ERROR_TYPE_ATTR_EGRESS,
+				   attr, "Not support egress.");
+		return -rte_errno;
+	}
+
+	/* not supported */
+	if (attr->transfer) {
+		memset(rss_conf, 0, sizeof(struct txgbe_rte_flow_rss_conf));
+		rte_flow_error_set(error, EINVAL,
+				   RTE_FLOW_ERROR_TYPE_ATTR_TRANSFER,
+				   attr, "No support for transfer.");
+		return -rte_errno;
+	}
+
+	if (attr->priority > 0xFFFF) {
+		memset(rss_conf, 0, sizeof(struct txgbe_rte_flow_rss_conf));
+		rte_flow_error_set(error, EINVAL,
+				   RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY,
+				   attr, "Error priority.");
+		return -rte_errno;
+	}
+
+	return 0;
+}
+
diff --git a/drivers/net/txgbe/txgbe_rxtx.c b/drivers/net/txgbe/txgbe_rxtx.c
index 82dde509a..5f212ffc3 100644
--- a/drivers/net/txgbe/txgbe_rxtx.c
+++ b/drivers/net/txgbe/txgbe_rxtx.c
@@ -4633,3 +4633,23 @@ txgbe_txq_info_get(struct rte_eth_dev *dev, uint16_t queue_id,
 	qinfo->conf.tx_deferred_start = txq->tx_deferred_start;
 }
 
+int
+txgbe_rss_conf_init(struct txgbe_rte_flow_rss_conf *out,
+		    const struct rte_flow_action_rss *in)
+{
+	if (in->key_len > RTE_DIM(out->key) ||
+	    in->queue_num > RTE_DIM(out->queue))
+		return -EINVAL;
+	out->conf = (struct rte_flow_action_rss){
+		.func = in->func,
+		.level = in->level,
+		.types = in->types,
+		.key_len = in->key_len,
+		.queue_num = in->queue_num,
+		.key = memcpy(out->key, in->key, in->key_len),
+		.queue = memcpy(out->queue, in->queue,
+				sizeof(*in->queue) * in->queue_num),
+	};
+	return 0;
+}
+
-- 
2.18.4