[dpdk-dev] [PATCH v2 15/20] net/ixgbe: support adding TM node

[Wenzhuo Lu <wenzhuo.lu@intel.com>]

Add the support of the Traffic Management API,
rte_tm_node_add.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.h |  36 ++++
 drivers/net/ixgbe/ixgbe_tm.c     | 386 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 422 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.h b/drivers/net/ixgbe/ixgbe_ethdev.h
index b647702..118c271 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.h
+++ b/drivers/net/ixgbe/ixgbe_ethdev.h
@@ -445,9 +445,45 @@ struct ixgbe_tm_shaper_profile {
 
 TAILQ_HEAD(ixgbe_shaper_profile_list, ixgbe_tm_shaper_profile);
 
+/* node type of Traffic Manager */
+enum ixgbe_tm_node_type {
+	IXGBE_TM_NODE_TYPE_PORT,
+	IXGBE_TM_NODE_TYPE_TC,
+	IXGBE_TM_NODE_TYPE_QUEUE,
+	IXGBE_TM_NODE_TYPE_MAX,
+};
+
+/* Struct to store Traffic Manager node configuration. */
+struct ixgbe_tm_node {
+	TAILQ_ENTRY(ixgbe_tm_node) node;
+	uint32_t id;
+	uint32_t priority;
+	uint32_t weight;
+	uint32_t reference_count;
+	uint16_t no;
+	struct ixgbe_tm_node *parent;
+	struct ixgbe_tm_shaper_profile *shaper_profile;
+	struct rte_tm_node_params params;
+};
+
+TAILQ_HEAD(ixgbe_tm_node_list, ixgbe_tm_node);
+
 /* The configuration of Traffic Manager */
 struct ixgbe_tm_conf {
 	struct ixgbe_shaper_profile_list shaper_profile_list;
+	struct ixgbe_tm_node *root; /* root node - port */
+	struct ixgbe_tm_node_list tc_list; /* node list for all the TCs */
+	struct ixgbe_tm_node_list queue_list; /* node list for all the queues */
+	/**
+	 * The number of added TC nodes.
+	 * It should be no more than the TC number of this port.
+	 */
+	uint32_t nb_tc_node;
+	/**
+	 * The number of added queue nodes.
+	 * It should be no more than the queue number of this port.
+	 */
+	uint32_t nb_queue_node;
 };
 
 /*
diff --git a/drivers/net/ixgbe/ixgbe_tm.c b/drivers/net/ixgbe/ixgbe_tm.c
index b3b1acf..82b3b20 100644
--- a/drivers/net/ixgbe/ixgbe_tm.c
+++ b/drivers/net/ixgbe/ixgbe_tm.c
@@ -45,11 +45,17 @@ static int ixgbe_shaper_profile_add(struct rte_eth_dev *dev,
 static int ixgbe_shaper_profile_del(struct rte_eth_dev *dev,
 				    uint32_t shaper_profile_id,
 				    struct rte_tm_error *error);
+static int ixgbe_node_add(struct rte_eth_dev *dev, uint32_t node_id,
+			  uint32_t parent_node_id, uint32_t priority,
+			  uint32_t weight, uint32_t level_id,
+			  struct rte_tm_node_params *params,
+			  struct rte_tm_error *error);
 
 const struct rte_tm_ops ixgbe_tm_ops = {
 	.capabilities_get = ixgbe_tm_capabilities_get,
 	.shaper_profile_add = ixgbe_shaper_profile_add,
 	.shaper_profile_delete = ixgbe_shaper_profile_del,
+	.node_add = ixgbe_node_add,
 };
 
 int
@@ -72,6 +78,13 @@ static int ixgbe_shaper_profile_del(struct rte_eth_dev *dev,
 
 	/* initialize shaper profile list */
 	TAILQ_INIT(&tm_conf->shaper_profile_list);
+
+	/* initialize node configuration */
+	tm_conf->root = NULL;
+	TAILQ_INIT(&tm_conf->queue_list);
+	TAILQ_INIT(&tm_conf->tc_list);
+	tm_conf->nb_tc_node = 0;
+	tm_conf->nb_queue_node = 0;
 }
 
 void
@@ -80,6 +93,23 @@ static int ixgbe_shaper_profile_del(struct rte_eth_dev *dev,
 	struct ixgbe_tm_conf *tm_conf =
 		IXGBE_DEV_PRIVATE_TO_TM_CONF(dev->data->dev_private);
 	struct ixgbe_tm_shaper_profile *shaper_profile;
+	struct ixgbe_tm_node *tm_node;
+
+	/* clear node configuration */
+	while ((tm_node = TAILQ_FIRST(&tm_conf->queue_list))) {
+		TAILQ_REMOVE(&tm_conf->queue_list, tm_node, node);
+		rte_free(tm_node);
+	}
+	tm_conf->nb_queue_node = 0;
+	while ((tm_node = TAILQ_FIRST(&tm_conf->tc_list))) {
+		TAILQ_REMOVE(&tm_conf->tc_list, tm_node, node);
+		rte_free(tm_node);
+	}
+	tm_conf->nb_tc_node = 0;
+	if (tm_conf->root) {
+		rte_free(tm_conf->root);
+		tm_conf->root = NULL;
+	}
 
 	/* Remove all shaper profiles */
 	while ((shaper_profile =
@@ -284,3 +314,359 @@ static int ixgbe_shaper_profile_del(struct rte_eth_dev *dev,
 
 	return 0;
 }
+
+static inline struct ixgbe_tm_node *
+ixgbe_tm_node_search(struct rte_eth_dev *dev, uint32_t node_id,
+		     enum ixgbe_tm_node_type *node_type)
+{
+	struct ixgbe_tm_conf *tm_conf =
+		IXGBE_DEV_PRIVATE_TO_TM_CONF(dev->data->dev_private);
+	struct ixgbe_tm_node *tm_node;
+
+	if (tm_conf->root && tm_conf->root->id == node_id) {
+		*node_type = IXGBE_TM_NODE_TYPE_PORT;
+		return tm_conf->root;
+	}
+
+	TAILQ_FOREACH(tm_node, &tm_conf->tc_list, node) {
+		if (tm_node->id == node_id) {
+			*node_type = IXGBE_TM_NODE_TYPE_TC;
+			return tm_node;
+		}
+	}
+
+	TAILQ_FOREACH(tm_node, &tm_conf->queue_list, node) {
+		if (tm_node->id == node_id) {
+			*node_type = IXGBE_TM_NODE_TYPE_QUEUE;
+			return tm_node;
+		}
+	}
+
+	return NULL;
+}
+
+static void
+ixgbe_queue_base_nb_get(struct rte_eth_dev *dev, uint16_t tc_node_no,
+			uint16_t *base, uint16_t *nb)
+{
+	uint8_t nb_tcs = ixgbe_tc_nb_get(dev);
+	struct rte_pci_device *pci_dev = IXGBE_DEV_TO_PCI(dev);
+	uint16_t vf_num = pci_dev->max_vfs;
+
+	*base = 0;
+	*nb = 0;
+
+	/* VT on */
+	if (vf_num) {
+		/* no DCB */
+		if (nb_tcs == 1) {
+			if (vf_num >= ETH_32_POOLS) {
+				*nb = 2;
+				*base = vf_num * 2;
+			} else if (vf_num >= ETH_16_POOLS) {
+				*nb = 4;
+				*base = vf_num * 4;
+			} else {
+				*nb = 8;
+				*base = vf_num * 8;
+			}
+		} else {
+			/* DCB */
+			*nb = 1;
+			*base = vf_num * nb_tcs + tc_node_no;
+		}
+	} else {
+		/* VT off */
+		if (nb_tcs == ETH_8_TCS) {
+			switch (tc_node_no) {
+			case 0:
+				*base = 0;
+				*nb = 32;
+				break;
+			case 1:
+				*base = 32;
+				*nb = 32;
+				break;
+			case 2:
+				*base = 64;
+				*nb = 16;
+				break;
+			case 3:
+				*base = 80;
+				*nb = 16;
+				break;
+			case 4:
+				*base = 96;
+				*nb = 8;
+				break;
+			case 5:
+				*base = 104;
+				*nb = 8;
+				break;
+			case 6:
+				*base = 112;
+				*nb = 8;
+				break;
+			case 7:
+				*base = 120;
+				*nb = 8;
+				break;
+			default:
+				return;
+			}
+		} else {
+			switch (tc_node_no) {
+			/**
+			 * If no VF and no DCB, only 64 queues can be used.
+			 * This case also be covered by this "case 0".
+			 */
+			case 0:
+				*base = 0;
+				*nb = 64;
+				break;
+			case 1:
+				*base = 64;
+				*nb = 32;
+				break;
+			case 2:
+				*base = 96;
+				*nb = 16;
+				break;
+			case 3:
+				*base = 112;
+				*nb = 16;
+				break;
+			default:
+				return;
+			}
+		}
+	}
+}
+
+static int
+ixgbe_node_add(struct rte_eth_dev *dev, uint32_t node_id,
+	       uint32_t parent_node_id, uint32_t priority,
+	       uint32_t weight, uint32_t level_id,
+	       struct rte_tm_node_params *params,
+	       struct rte_tm_error *error)
+{
+	struct ixgbe_tm_conf *tm_conf =
+		IXGBE_DEV_PRIVATE_TO_TM_CONF(dev->data->dev_private);
+	enum ixgbe_tm_node_type node_type = IXGBE_TM_NODE_TYPE_MAX;
+	enum ixgbe_tm_node_type parent_node_type = IXGBE_TM_NODE_TYPE_MAX;
+	struct ixgbe_tm_shaper_profile *shaper_profile;
+	struct ixgbe_tm_node *tm_node;
+	struct ixgbe_tm_node *parent_node;
+	uint8_t nb_tcs;
+	uint16_t q_base = 0;
+	uint16_t q_nb = 0;
+
+	if (!params || !error)
+		return -EINVAL;
+
+	if (node_id == RTE_TM_NODE_ID_NULL) {
+		error->type = RTE_TM_ERROR_TYPE_NODE_ID;
+		error->message = "invalid node id";
+		return -EINVAL;
+	}
+
+	if (priority) {
+		error->type = RTE_TM_ERROR_TYPE_NODE_PRIORITY;
+		error->message = "priority not supported";
+		return -EINVAL;
+	}
+
+	if (weight) {
+		error->type = RTE_TM_ERROR_TYPE_NODE_WEIGHT;
+		error->message = "weight not supported";
+		return -EINVAL;
+	}
+
+	/* check if the node ID is already used */
+	if (ixgbe_tm_node_search(dev, node_id, &node_type)) {
+		error->type = RTE_TM_ERROR_TYPE_NODE_ID;
+		error->message = "node id already used";
+		return -EINVAL;
+	}
+
+	/* check the shaper profile id */
+	shaper_profile = ixgbe_shaper_profile_search(dev,
+						     params->shaper_profile_id);
+	if (!shaper_profile) {
+		error->type = RTE_TM_ERROR_TYPE_NODE_PARAMS_SHAPER_PROFILE_ID;
+		error->message = "shaper profile not exist";
+		return -EINVAL;
+	}
+
+	/* not support shared shaper */
+	if (params->shared_shaper_id) {
+		error->type = RTE_TM_ERROR_TYPE_NODE_PARAMS_SHARED_SHAPER_ID;
+		error->message = "shared shaper not supported";
+		return -EINVAL;
+	}
+	if (params->n_shared_shapers) {
+		error->type = RTE_TM_ERROR_TYPE_NODE_PARAMS_N_SHARED_SHAPERS;
+		error->message = "shared shaper not supported";
+		return -EINVAL;
+	}
+
+	/* root node if not have a parent */
+	if (parent_node_id == RTE_TM_NODE_ID_NULL) {
+		/* check level */
+		if (level_id != RTE_TM_NODE_LEVEL_ID_ANY &&
+		    level_id > IXGBE_TM_NODE_TYPE_PORT) {
+			error->type = RTE_TM_ERROR_TYPE_NODE_PARAMS;
+			error->message = "Wrong level";
+			return -EINVAL;
+		}
+
+		/* check the unsupported parameters */
+		if (params->nonleaf.wfq_weight_mode) {
+			error->type =
+				RTE_TM_ERROR_TYPE_NODE_PARAMS_WFQ_WEIGHT_MODE;
+			error->message = "WFQ not supported";
+			return -EINVAL;
+		}
+		if (params->nonleaf.n_sp_priorities) {
+			error->type =
+				RTE_TM_ERROR_TYPE_NODE_PARAMS_N_SP_PRIORITIES;
+			error->message = "SP priority not supported";
+			return -EINVAL;
+		}
+
+		/* obviously no more than one root */
+		if (tm_conf->root) {
+			error->type = RTE_TM_ERROR_TYPE_NODE_PARENT_NODE_ID;
+			error->message = "already have a root";
+			return -EINVAL;
+		}
+
+		/* add the root node */
+		tm_node = rte_zmalloc("ixgbe_tm_node",
+				      sizeof(struct ixgbe_tm_node),
+				      0);
+		if (!tm_node)
+			return -ENOMEM;
+		tm_node->id = node_id;
+		tm_node->priority = priority;
+		tm_node->weight = weight;
+		tm_node->reference_count = 0;
+		tm_node->no = 0;
+		tm_node->parent = NULL;
+		tm_node->shaper_profile = shaper_profile;
+		(void)rte_memcpy(&tm_node->params, params,
+				 sizeof(struct rte_tm_node_params));
+		tm_conf->root = tm_node;
+
+		/* increase the reference counter of the shaper profile */
+		shaper_profile->reference_count++;
+
+		return 0;
+	}
+
+	/* TC or queue node */
+	/* check the unsupported parameters */
+	if (params->leaf.cman) {
+		error->type = RTE_TM_ERROR_TYPE_NODE_PARAMS_CMAN;
+		error->message = "Congestion management not supported";
+		return -EINVAL;
+	}
+	if (params->leaf.wred.wred_profile_id !=
+	    RTE_TM_WRED_PROFILE_ID_NONE) {
+		error->type =
+			RTE_TM_ERROR_TYPE_NODE_PARAMS_WRED_PROFILE_ID;
+		error->message = "WRED not supported";
+		return -EINVAL;
+	}
+	if (params->leaf.wred.shared_wred_context_id) {
+		error->type =
+			RTE_TM_ERROR_TYPE_NODE_PARAMS_SHARED_WRED_CONTEXT_ID;
+		error->message = "WRED not supported";
+		return -EINVAL;
+	}
+	if (params->leaf.wred.n_shared_wred_contexts) {
+		error->type =
+			RTE_TM_ERROR_TYPE_NODE_PARAMS_N_SHARED_WRED_CONTEXTS;
+		error->message = "WRED not supported";
+		return -EINVAL;
+	}
+
+	/* check the parent node */
+	parent_node = ixgbe_tm_node_search(dev, parent_node_id,
+					   &parent_node_type);
+	if (!parent_node) {
+		error->type = RTE_TM_ERROR_TYPE_NODE_PARENT_NODE_ID;
+		error->message = "parent not exist";
+		return -EINVAL;
+	}
+	if (parent_node_type != IXGBE_TM_NODE_TYPE_PORT &&
+	    parent_node_type != IXGBE_TM_NODE_TYPE_TC) {
+		error->type = RTE_TM_ERROR_TYPE_NODE_PARENT_NODE_ID;
+		error->message = "parent is not port or TC";
+		return -EINVAL;
+	}
+	/* check level */
+	if (level_id != RTE_TM_NODE_LEVEL_ID_ANY &&
+	    level_id != parent_node_type + 1) {
+		error->type = RTE_TM_ERROR_TYPE_NODE_PARAMS;
+		error->message = "Wrong level";
+		return -EINVAL;
+	}
+
+	/* check the node number */
+	if (parent_node_type == IXGBE_TM_NODE_TYPE_PORT) {
+		/* check TC number */
+		nb_tcs = ixgbe_tc_nb_get(dev);
+		if (tm_conf->nb_tc_node >= nb_tcs) {
+			error->type = RTE_TM_ERROR_TYPE_NODE_ID;
+			error->message = "too many TCs";
+			return -EINVAL;
+		}
+	} else {
+		/* check queue number */
+		if (tm_conf->nb_queue_node >= dev->data->nb_tx_queues) {
+			error->type = RTE_TM_ERROR_TYPE_NODE_ID;
+			error->message = "too many queues";
+			return -EINVAL;
+		}
+
+		ixgbe_queue_base_nb_get(dev, parent_node->no, &q_base, &q_nb);
+		if (parent_node->reference_count >= q_nb) {
+			error->type = RTE_TM_ERROR_TYPE_NODE_ID;
+			error->message = "too many queues than TC supported";
+			return -EINVAL;
+		}
+	}
+
+	/* add the TC or queue node */
+	tm_node = rte_zmalloc("ixgbe_tm_node",
+			      sizeof(struct ixgbe_tm_node),
+			      0);
+	if (!tm_node)
+		return -ENOMEM;
+	tm_node->id = node_id;
+	tm_node->priority = priority;
+	tm_node->weight = weight;
+	tm_node->reference_count = 0;
+	tm_node->parent = parent_node;
+	tm_node->shaper_profile = shaper_profile;
+	(void)rte_memcpy(&tm_node->params, params,
+			 sizeof(struct rte_tm_node_params));
+	if (parent_node_type == IXGBE_TM_NODE_TYPE_PORT) {
+		tm_node->no = parent_node->reference_count;
+		TAILQ_INSERT_TAIL(&tm_conf->tc_list,
+				  tm_node, node);
+		tm_conf->nb_tc_node++;
+	} else {
+		tm_node->no = q_base + parent_node->reference_count;
+		TAILQ_INSERT_TAIL(&tm_conf->queue_list,
+				  tm_node, node);
+		tm_conf->nb_queue_node++;
+	}
+	tm_node->parent->reference_count++;
+
+	/* increase the reference counter of the shaper profile */
+	shaper_profile->reference_count++;
+
+	return 0;
+}
-- 
1.9.3