net/i40e: support getting TM capability

Add the support of the Traffic Management API,
rte_tm_capabilities_get.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>

diff --git a/drivers/net/i40e/i40e_tm.c b/drivers/net/i40e/i40e_tm.c
index 2f4c866..9fc2f45 100644 (file)
--- a/drivers/net/i40e/i40e_tm.c
+++ b/drivers/net/i40e/i40e_tm.c
@@ -34,8 +34,12 @@
 #include "base/i40e_prototype.h"
 #include "i40e_ethdev.h"
 
+static int i40e_tm_capabilities_get(struct rte_eth_dev *dev,
+                                   struct rte_tm_capabilities *cap,
+                                   struct rte_tm_error *error);
+
 const struct rte_tm_ops i40e_tm_ops = {
-       NULL,
+       .capabilities_get = i40e_tm_capabilities_get,
 };
 
 int
@@ -49,3 +53,85 @@ i40e_tm_ops_get(struct rte_eth_dev *dev __rte_unused,
 
        return 0;
 }
+
+static inline uint16_t
+i40e_tc_nb_get(struct rte_eth_dev *dev)
+{
+       struct i40e_pf *pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private);
+       struct i40e_vsi *main_vsi = pf->main_vsi;
+       uint16_t sum = 0;
+       int i;
+
+       for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
+               if (main_vsi->enabled_tc & BIT_ULL(i))
+                       sum++;
+       }
+
+       return sum;
+}
+
+static int
+i40e_tm_capabilities_get(struct rte_eth_dev *dev,
+                        struct rte_tm_capabilities *cap,
+                        struct rte_tm_error *error)
+{
+       struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+       uint16_t tc_nb = i40e_tc_nb_get(dev);
+
+       if (!cap || !error)
+               return -EINVAL;
+
+       if (tc_nb > hw->func_caps.num_tx_qp)
+               return -EINVAL;
+
+       error->type = RTE_TM_ERROR_TYPE_NONE;
+
+       /* set all the parameters to 0 first. */
+       memset(cap, 0, sizeof(struct rte_tm_capabilities));
+
+       /**
+        * support port + TCs + queues
+        * here shows the max capability not the current configuration.
+        */
+       cap->n_nodes_max = 1 + I40E_MAX_TRAFFIC_CLASS + hw->func_caps.num_tx_qp;
+       cap->n_levels_max = 3; /* port, TC, queue */
+       cap->non_leaf_nodes_identical = 1;
+       cap->leaf_nodes_identical = 1;
+       cap->shaper_n_max = cap->n_nodes_max;
+       cap->shaper_private_n_max = cap->n_nodes_max;
+       cap->shaper_private_dual_rate_n_max = 0;
+       cap->shaper_private_rate_min = 0;
+       /* 40Gbps -> 5GBps */
+       cap->shaper_private_rate_max = 5000000000ull;
+       cap->shaper_shared_n_max = 0;
+       cap->shaper_shared_n_nodes_per_shaper_max = 0;
+       cap->shaper_shared_n_shapers_per_node_max = 0;
+       cap->shaper_shared_dual_rate_n_max = 0;
+       cap->shaper_shared_rate_min = 0;
+       cap->shaper_shared_rate_max = 0;
+       cap->sched_n_children_max = hw->func_caps.num_tx_qp;
+       /**
+        * HW supports SP. But no plan to support it now.
+        * So, all the nodes should have the same priority.
+        */
+       cap->sched_sp_n_priorities_max = 1;
+       cap->sched_wfq_n_children_per_group_max = 0;
+       cap->sched_wfq_n_groups_max = 0;
+       /**
+        * SW only supports fair round robin now.
+        * So, all the nodes should have the same weight.
+        */
+       cap->sched_wfq_weight_max = 1;
+       cap->cman_head_drop_supported = 0;
+       cap->dynamic_update_mask = 0;
+       cap->shaper_pkt_length_adjust_min = RTE_TM_ETH_FRAMING_OVERHEAD;
+       cap->shaper_pkt_length_adjust_max = RTE_TM_ETH_FRAMING_OVERHEAD_FCS;
+       cap->cman_wred_context_n_max = 0;
+       cap->cman_wred_context_private_n_max = 0;
+       cap->cman_wred_context_shared_n_max = 0;
+       cap->cman_wred_context_shared_n_nodes_per_context_max = 0;
+       cap->cman_wred_context_shared_n_contexts_per_node_max = 0;
+       cap->stats_mask = 0;
+
+       return 0;
+}