1083 lines
28 KiB
C
1083 lines
28 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
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/* Copyright (c) 2020, Mellanox Technologies inc. All rights reserved. */
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#include <net/sch_generic.h>
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#include "en.h"
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#include "params.h"
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#include "../qos.h"
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#define BYTES_IN_MBIT 125000
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int mlx5e_qos_bytes_rate_check(struct mlx5_core_dev *mdev, u64 nbytes)
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{
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if (nbytes < BYTES_IN_MBIT) {
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qos_warn(mdev, "Input rate (%llu Bytes/sec) below minimum supported (%u Bytes/sec)\n",
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nbytes, BYTES_IN_MBIT);
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return -EINVAL;
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}
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return 0;
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}
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static u32 mlx5e_qos_bytes2mbits(struct mlx5_core_dev *mdev, u64 nbytes)
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{
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return div_u64(nbytes, BYTES_IN_MBIT);
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}
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int mlx5e_qos_max_leaf_nodes(struct mlx5_core_dev *mdev)
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{
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return min(MLX5E_QOS_MAX_LEAF_NODES, mlx5_qos_max_leaf_nodes(mdev));
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}
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int mlx5e_qos_cur_leaf_nodes(struct mlx5e_priv *priv)
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{
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int last = find_last_bit(priv->htb.qos_used_qids, mlx5e_qos_max_leaf_nodes(priv->mdev));
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return last == mlx5e_qos_max_leaf_nodes(priv->mdev) ? 0 : last + 1;
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}
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/* Software representation of the QoS tree (internal to this file) */
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static int mlx5e_find_unused_qos_qid(struct mlx5e_priv *priv)
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{
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int size = mlx5e_qos_max_leaf_nodes(priv->mdev);
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int res;
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WARN_ONCE(!mutex_is_locked(&priv->state_lock), "%s: state_lock is not held\n", __func__);
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res = find_first_zero_bit(priv->htb.qos_used_qids, size);
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return res == size ? -ENOSPC : res;
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}
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struct mlx5e_qos_node {
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struct hlist_node hnode;
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struct rcu_head rcu;
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struct mlx5e_qos_node *parent;
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u64 rate;
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u32 bw_share;
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u32 max_average_bw;
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u32 hw_id;
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u32 classid; /* 16-bit, except root. */
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u16 qid;
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};
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#define MLX5E_QOS_QID_INNER 0xffff
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#define MLX5E_HTB_CLASSID_ROOT 0xffffffff
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static struct mlx5e_qos_node *
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mlx5e_sw_node_create_leaf(struct mlx5e_priv *priv, u16 classid, u16 qid,
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struct mlx5e_qos_node *parent)
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{
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struct mlx5e_qos_node *node;
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node = kzalloc(sizeof(*node), GFP_KERNEL);
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if (!node)
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return ERR_PTR(-ENOMEM);
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node->parent = parent;
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node->qid = qid;
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__set_bit(qid, priv->htb.qos_used_qids);
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node->classid = classid;
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hash_add_rcu(priv->htb.qos_tc2node, &node->hnode, classid);
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mlx5e_update_tx_netdev_queues(priv);
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return node;
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}
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static struct mlx5e_qos_node *mlx5e_sw_node_create_root(struct mlx5e_priv *priv)
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{
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struct mlx5e_qos_node *node;
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node = kzalloc(sizeof(*node), GFP_KERNEL);
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if (!node)
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return ERR_PTR(-ENOMEM);
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node->qid = MLX5E_QOS_QID_INNER;
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node->classid = MLX5E_HTB_CLASSID_ROOT;
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hash_add_rcu(priv->htb.qos_tc2node, &node->hnode, node->classid);
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return node;
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}
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static struct mlx5e_qos_node *mlx5e_sw_node_find(struct mlx5e_priv *priv, u32 classid)
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{
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struct mlx5e_qos_node *node = NULL;
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hash_for_each_possible(priv->htb.qos_tc2node, node, hnode, classid) {
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if (node->classid == classid)
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break;
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}
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return node;
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}
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static struct mlx5e_qos_node *mlx5e_sw_node_find_rcu(struct mlx5e_priv *priv, u32 classid)
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{
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struct mlx5e_qos_node *node = NULL;
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hash_for_each_possible_rcu(priv->htb.qos_tc2node, node, hnode, classid) {
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if (node->classid == classid)
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break;
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}
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return node;
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}
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static void mlx5e_sw_node_delete(struct mlx5e_priv *priv, struct mlx5e_qos_node *node)
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{
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hash_del_rcu(&node->hnode);
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if (node->qid != MLX5E_QOS_QID_INNER) {
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__clear_bit(node->qid, priv->htb.qos_used_qids);
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mlx5e_update_tx_netdev_queues(priv);
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}
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kfree_rcu(node, rcu);
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}
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/* TX datapath API */
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static u16 mlx5e_qid_from_qos(struct mlx5e_channels *chs, u16 qid)
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{
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/* These channel params are safe to access from the datapath, because:
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* 1. This function is called only after checking priv->htb.maj_id != 0,
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* and the number of queues can't change while HTB offload is active.
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* 2. When priv->htb.maj_id becomes 0, synchronize_rcu waits for
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* mlx5e_select_queue to finish while holding priv->state_lock,
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* preventing other code from changing the number of queues.
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*/
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bool is_ptp = MLX5E_GET_PFLAG(&chs->params, MLX5E_PFLAG_TX_PORT_TS);
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return (chs->params.num_channels + is_ptp) * mlx5e_get_dcb_num_tc(&chs->params) + qid;
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}
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int mlx5e_get_txq_by_classid(struct mlx5e_priv *priv, u16 classid)
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{
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struct mlx5e_qos_node *node;
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u16 qid;
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int res;
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rcu_read_lock();
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node = mlx5e_sw_node_find_rcu(priv, classid);
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if (!node) {
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res = -ENOENT;
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goto out;
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}
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qid = READ_ONCE(node->qid);
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if (qid == MLX5E_QOS_QID_INNER) {
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res = -EINVAL;
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goto out;
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}
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res = mlx5e_qid_from_qos(&priv->channels, qid);
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out:
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rcu_read_unlock();
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return res;
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}
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static struct mlx5e_txqsq *mlx5e_get_qos_sq(struct mlx5e_priv *priv, int qid)
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{
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struct mlx5e_params *params = &priv->channels.params;
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struct mlx5e_txqsq __rcu **qos_sqs;
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struct mlx5e_channel *c;
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int ix;
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ix = qid % params->num_channels;
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qid /= params->num_channels;
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c = priv->channels.c[ix];
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qos_sqs = mlx5e_state_dereference(priv, c->qos_sqs);
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return mlx5e_state_dereference(priv, qos_sqs[qid]);
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}
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/* SQ lifecycle */
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static int mlx5e_open_qos_sq(struct mlx5e_priv *priv, struct mlx5e_channels *chs,
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struct mlx5e_qos_node *node)
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{
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struct mlx5e_create_cq_param ccp = {};
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struct mlx5e_txqsq __rcu **qos_sqs;
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struct mlx5e_sq_param param_sq;
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struct mlx5e_cq_param param_cq;
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int txq_ix, ix, qid, err = 0;
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struct mlx5e_params *params;
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struct mlx5e_channel *c;
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struct mlx5e_txqsq *sq;
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params = &chs->params;
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txq_ix = mlx5e_qid_from_qos(chs, node->qid);
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WARN_ON(node->qid > priv->htb.max_qos_sqs);
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if (node->qid == priv->htb.max_qos_sqs) {
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struct mlx5e_sq_stats *stats, **stats_list = NULL;
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if (priv->htb.max_qos_sqs == 0) {
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stats_list = kvcalloc(mlx5e_qos_max_leaf_nodes(priv->mdev),
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sizeof(*stats_list),
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GFP_KERNEL);
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if (!stats_list)
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return -ENOMEM;
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}
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stats = kzalloc(sizeof(*stats), GFP_KERNEL);
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if (!stats) {
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kvfree(stats_list);
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return -ENOMEM;
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}
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if (stats_list)
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WRITE_ONCE(priv->htb.qos_sq_stats, stats_list);
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WRITE_ONCE(priv->htb.qos_sq_stats[node->qid], stats);
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/* Order max_qos_sqs increment after writing the array pointer.
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* Pairs with smp_load_acquire in en_stats.c.
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*/
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smp_store_release(&priv->htb.max_qos_sqs, priv->htb.max_qos_sqs + 1);
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}
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ix = node->qid % params->num_channels;
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qid = node->qid / params->num_channels;
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c = chs->c[ix];
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qos_sqs = mlx5e_state_dereference(priv, c->qos_sqs);
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sq = kzalloc(sizeof(*sq), GFP_KERNEL);
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if (!sq)
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return -ENOMEM;
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mlx5e_build_create_cq_param(&ccp, c);
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memset(¶m_sq, 0, sizeof(param_sq));
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memset(¶m_cq, 0, sizeof(param_cq));
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mlx5e_build_sq_param(priv->mdev, params, ¶m_sq);
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mlx5e_build_tx_cq_param(priv->mdev, params, ¶m_cq);
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err = mlx5e_open_cq(priv, params->tx_cq_moderation, ¶m_cq, &ccp, &sq->cq);
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if (err)
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goto err_free_sq;
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err = mlx5e_open_txqsq(c, priv->tisn[c->lag_port][0], txq_ix, params,
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¶m_sq, sq, 0, node->hw_id,
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priv->htb.qos_sq_stats[node->qid]);
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if (err)
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goto err_close_cq;
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rcu_assign_pointer(qos_sqs[qid], sq);
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return 0;
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err_close_cq:
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mlx5e_close_cq(&sq->cq);
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err_free_sq:
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kfree(sq);
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return err;
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}
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static void mlx5e_activate_qos_sq(struct mlx5e_priv *priv, struct mlx5e_qos_node *node)
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{
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struct mlx5e_txqsq *sq;
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sq = mlx5e_get_qos_sq(priv, node->qid);
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WRITE_ONCE(priv->txq2sq[mlx5e_qid_from_qos(&priv->channels, node->qid)], sq);
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/* Make the change to txq2sq visible before the queue is started.
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* As mlx5e_xmit runs under a spinlock, there is an implicit ACQUIRE,
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* which pairs with this barrier.
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*/
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smp_wmb();
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qos_dbg(priv->mdev, "Activate QoS SQ qid %u\n", node->qid);
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mlx5e_activate_txqsq(sq);
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}
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static void mlx5e_deactivate_qos_sq(struct mlx5e_priv *priv, u16 qid)
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{
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struct mlx5e_txqsq *sq;
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sq = mlx5e_get_qos_sq(priv, qid);
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if (!sq) /* Handle the case when the SQ failed to open. */
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return;
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qos_dbg(priv->mdev, "Deactivate QoS SQ qid %u\n", qid);
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mlx5e_deactivate_txqsq(sq);
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/* The queue is disabled, no synchronization with datapath is needed. */
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priv->txq2sq[mlx5e_qid_from_qos(&priv->channels, qid)] = NULL;
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}
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static void mlx5e_close_qos_sq(struct mlx5e_priv *priv, u16 qid)
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{
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struct mlx5e_txqsq __rcu **qos_sqs;
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struct mlx5e_params *params;
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struct mlx5e_channel *c;
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struct mlx5e_txqsq *sq;
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int ix;
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params = &priv->channels.params;
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ix = qid % params->num_channels;
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qid /= params->num_channels;
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c = priv->channels.c[ix];
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qos_sqs = mlx5e_state_dereference(priv, c->qos_sqs);
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sq = rcu_replace_pointer(qos_sqs[qid], NULL, lockdep_is_held(&priv->state_lock));
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if (!sq) /* Handle the case when the SQ failed to open. */
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return;
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synchronize_rcu(); /* Sync with NAPI. */
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mlx5e_close_txqsq(sq);
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mlx5e_close_cq(&sq->cq);
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kfree(sq);
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}
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void mlx5e_qos_close_queues(struct mlx5e_channel *c)
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{
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struct mlx5e_txqsq __rcu **qos_sqs;
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int i;
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qos_sqs = rcu_replace_pointer(c->qos_sqs, NULL, lockdep_is_held(&c->priv->state_lock));
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if (!qos_sqs)
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return;
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synchronize_rcu(); /* Sync with NAPI. */
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for (i = 0; i < c->qos_sqs_size; i++) {
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struct mlx5e_txqsq *sq;
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sq = mlx5e_state_dereference(c->priv, qos_sqs[i]);
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if (!sq) /* Handle the case when the SQ failed to open. */
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continue;
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mlx5e_close_txqsq(sq);
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mlx5e_close_cq(&sq->cq);
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kfree(sq);
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}
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kvfree(qos_sqs);
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}
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static void mlx5e_qos_close_all_queues(struct mlx5e_channels *chs)
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{
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int i;
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for (i = 0; i < chs->num; i++)
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mlx5e_qos_close_queues(chs->c[i]);
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}
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static int mlx5e_qos_alloc_queues(struct mlx5e_priv *priv, struct mlx5e_channels *chs)
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{
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u16 qos_sqs_size;
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int i;
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qos_sqs_size = DIV_ROUND_UP(mlx5e_qos_max_leaf_nodes(priv->mdev), chs->num);
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for (i = 0; i < chs->num; i++) {
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struct mlx5e_txqsq **sqs;
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sqs = kvcalloc(qos_sqs_size, sizeof(struct mlx5e_txqsq *), GFP_KERNEL);
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if (!sqs)
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goto err_free;
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WRITE_ONCE(chs->c[i]->qos_sqs_size, qos_sqs_size);
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smp_wmb(); /* Pairs with mlx5e_napi_poll. */
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rcu_assign_pointer(chs->c[i]->qos_sqs, sqs);
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}
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return 0;
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err_free:
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while (--i >= 0) {
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struct mlx5e_txqsq **sqs;
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sqs = rcu_replace_pointer(chs->c[i]->qos_sqs, NULL,
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lockdep_is_held(&priv->state_lock));
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synchronize_rcu(); /* Sync with NAPI. */
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kvfree(sqs);
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}
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return -ENOMEM;
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}
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int mlx5e_qos_open_queues(struct mlx5e_priv *priv, struct mlx5e_channels *chs)
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{
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struct mlx5e_qos_node *node = NULL;
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int bkt, err;
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if (!priv->htb.maj_id)
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return 0;
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err = mlx5e_qos_alloc_queues(priv, chs);
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if (err)
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return err;
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hash_for_each(priv->htb.qos_tc2node, bkt, node, hnode) {
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if (node->qid == MLX5E_QOS_QID_INNER)
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continue;
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err = mlx5e_open_qos_sq(priv, chs, node);
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if (err) {
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mlx5e_qos_close_all_queues(chs);
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return err;
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}
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}
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return 0;
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}
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void mlx5e_qos_activate_queues(struct mlx5e_priv *priv)
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{
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struct mlx5e_qos_node *node = NULL;
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int bkt;
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hash_for_each(priv->htb.qos_tc2node, bkt, node, hnode) {
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if (node->qid == MLX5E_QOS_QID_INNER)
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continue;
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mlx5e_activate_qos_sq(priv, node);
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}
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}
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void mlx5e_qos_deactivate_queues(struct mlx5e_channel *c)
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{
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struct mlx5e_params *params = &c->priv->channels.params;
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struct mlx5e_txqsq __rcu **qos_sqs;
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int i;
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qos_sqs = mlx5e_state_dereference(c->priv, c->qos_sqs);
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if (!qos_sqs)
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return;
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for (i = 0; i < c->qos_sqs_size; i++) {
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u16 qid = params->num_channels * i + c->ix;
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struct mlx5e_txqsq *sq;
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sq = mlx5e_state_dereference(c->priv, qos_sqs[i]);
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if (!sq) /* Handle the case when the SQ failed to open. */
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continue;
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qos_dbg(c->mdev, "Deactivate QoS SQ qid %u\n", qid);
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mlx5e_deactivate_txqsq(sq);
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/* The queue is disabled, no synchronization with datapath is needed. */
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c->priv->txq2sq[mlx5e_qid_from_qos(&c->priv->channels, qid)] = NULL;
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}
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}
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static void mlx5e_qos_deactivate_all_queues(struct mlx5e_channels *chs)
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{
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int i;
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for (i = 0; i < chs->num; i++)
|
|
mlx5e_qos_deactivate_queues(chs->c[i]);
|
|
}
|
|
|
|
/* HTB API */
|
|
|
|
int mlx5e_htb_root_add(struct mlx5e_priv *priv, u16 htb_maj_id, u16 htb_defcls,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct mlx5e_qos_node *root;
|
|
bool opened;
|
|
int err;
|
|
|
|
qos_dbg(priv->mdev, "TC_HTB_CREATE handle %04x:, default :%04x\n", htb_maj_id, htb_defcls);
|
|
|
|
if (!mlx5_qos_is_supported(priv->mdev)) {
|
|
NL_SET_ERR_MSG_MOD(extack,
|
|
"Missing QoS capabilities. Try disabling SRIOV or use a supported device.");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
opened = test_bit(MLX5E_STATE_OPENED, &priv->state);
|
|
if (opened) {
|
|
err = mlx5e_qos_alloc_queues(priv, &priv->channels);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
root = mlx5e_sw_node_create_root(priv);
|
|
if (IS_ERR(root)) {
|
|
err = PTR_ERR(root);
|
|
goto err_free_queues;
|
|
}
|
|
|
|
err = mlx5_qos_create_root_node(priv->mdev, &root->hw_id);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Firmware error. Try upgrading firmware.");
|
|
goto err_sw_node_delete;
|
|
}
|
|
|
|
WRITE_ONCE(priv->htb.defcls, htb_defcls);
|
|
/* Order maj_id after defcls - pairs with
|
|
* mlx5e_select_queue/mlx5e_select_htb_queues.
|
|
*/
|
|
smp_store_release(&priv->htb.maj_id, htb_maj_id);
|
|
|
|
return 0;
|
|
|
|
err_sw_node_delete:
|
|
mlx5e_sw_node_delete(priv, root);
|
|
|
|
err_free_queues:
|
|
if (opened)
|
|
mlx5e_qos_close_all_queues(&priv->channels);
|
|
return err;
|
|
}
|
|
|
|
int mlx5e_htb_root_del(struct mlx5e_priv *priv)
|
|
{
|
|
struct mlx5e_qos_node *root;
|
|
int err;
|
|
|
|
qos_dbg(priv->mdev, "TC_HTB_DESTROY\n");
|
|
|
|
WRITE_ONCE(priv->htb.maj_id, 0);
|
|
synchronize_rcu(); /* Sync with mlx5e_select_htb_queue and TX data path. */
|
|
|
|
root = mlx5e_sw_node_find(priv, MLX5E_HTB_CLASSID_ROOT);
|
|
if (!root) {
|
|
qos_err(priv->mdev, "Failed to find the root node in the QoS tree\n");
|
|
return -ENOENT;
|
|
}
|
|
err = mlx5_qos_destroy_node(priv->mdev, root->hw_id);
|
|
if (err)
|
|
qos_err(priv->mdev, "Failed to destroy root node %u, err = %d\n",
|
|
root->hw_id, err);
|
|
mlx5e_sw_node_delete(priv, root);
|
|
|
|
mlx5e_qos_deactivate_all_queues(&priv->channels);
|
|
mlx5e_qos_close_all_queues(&priv->channels);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int mlx5e_htb_convert_rate(struct mlx5e_priv *priv, u64 rate,
|
|
struct mlx5e_qos_node *parent, u32 *bw_share)
|
|
{
|
|
u64 share = 0;
|
|
|
|
while (parent->classid != MLX5E_HTB_CLASSID_ROOT && !parent->max_average_bw)
|
|
parent = parent->parent;
|
|
|
|
if (parent->max_average_bw)
|
|
share = div64_u64(div_u64(rate * 100, BYTES_IN_MBIT),
|
|
parent->max_average_bw);
|
|
else
|
|
share = 101;
|
|
|
|
*bw_share = share == 0 ? 1 : share > 100 ? 0 : share;
|
|
|
|
qos_dbg(priv->mdev, "Convert: rate %llu, parent ceil %llu -> bw_share %u\n",
|
|
rate, (u64)parent->max_average_bw * BYTES_IN_MBIT, *bw_share);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mlx5e_htb_convert_ceil(struct mlx5e_priv *priv, u64 ceil, u32 *max_average_bw)
|
|
{
|
|
*max_average_bw = div_u64(ceil, BYTES_IN_MBIT);
|
|
|
|
qos_dbg(priv->mdev, "Convert: ceil %llu -> max_average_bw %u\n",
|
|
ceil, *max_average_bw);
|
|
}
|
|
|
|
int mlx5e_htb_leaf_alloc_queue(struct mlx5e_priv *priv, u16 classid,
|
|
u32 parent_classid, u64 rate, u64 ceil,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct mlx5e_qos_node *node, *parent;
|
|
int qid;
|
|
int err;
|
|
|
|
qos_dbg(priv->mdev, "TC_HTB_LEAF_ALLOC_QUEUE classid %04x, parent %04x, rate %llu, ceil %llu\n",
|
|
classid, parent_classid, rate, ceil);
|
|
|
|
qid = mlx5e_find_unused_qos_qid(priv);
|
|
if (qid < 0) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Maximum amount of leaf classes is reached.");
|
|
return qid;
|
|
}
|
|
|
|
parent = mlx5e_sw_node_find(priv, parent_classid);
|
|
if (!parent)
|
|
return -EINVAL;
|
|
|
|
node = mlx5e_sw_node_create_leaf(priv, classid, qid, parent);
|
|
if (IS_ERR(node))
|
|
return PTR_ERR(node);
|
|
|
|
node->rate = rate;
|
|
mlx5e_htb_convert_rate(priv, rate, node->parent, &node->bw_share);
|
|
mlx5e_htb_convert_ceil(priv, ceil, &node->max_average_bw);
|
|
|
|
err = mlx5_qos_create_leaf_node(priv->mdev, node->parent->hw_id,
|
|
node->bw_share, node->max_average_bw,
|
|
&node->hw_id);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Firmware error when creating a leaf node.");
|
|
qos_err(priv->mdev, "Failed to create a leaf node (class %04x), err = %d\n",
|
|
classid, err);
|
|
mlx5e_sw_node_delete(priv, node);
|
|
return err;
|
|
}
|
|
|
|
if (test_bit(MLX5E_STATE_OPENED, &priv->state)) {
|
|
err = mlx5e_open_qos_sq(priv, &priv->channels, node);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Error creating an SQ.");
|
|
qos_warn(priv->mdev, "Failed to create a QoS SQ (class %04x), err = %d\n",
|
|
classid, err);
|
|
} else {
|
|
mlx5e_activate_qos_sq(priv, node);
|
|
}
|
|
}
|
|
|
|
return mlx5e_qid_from_qos(&priv->channels, node->qid);
|
|
}
|
|
|
|
int mlx5e_htb_leaf_to_inner(struct mlx5e_priv *priv, u16 classid, u16 child_classid,
|
|
u64 rate, u64 ceil, struct netlink_ext_ack *extack)
|
|
{
|
|
struct mlx5e_qos_node *node, *child;
|
|
int err, tmp_err;
|
|
u32 new_hw_id;
|
|
u16 qid;
|
|
|
|
qos_dbg(priv->mdev, "TC_HTB_LEAF_TO_INNER classid %04x, upcoming child %04x, rate %llu, ceil %llu\n",
|
|
classid, child_classid, rate, ceil);
|
|
|
|
node = mlx5e_sw_node_find(priv, classid);
|
|
if (!node)
|
|
return -ENOENT;
|
|
|
|
err = mlx5_qos_create_inner_node(priv->mdev, node->parent->hw_id,
|
|
node->bw_share, node->max_average_bw,
|
|
&new_hw_id);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Firmware error when creating an inner node.");
|
|
qos_err(priv->mdev, "Failed to create an inner node (class %04x), err = %d\n",
|
|
classid, err);
|
|
return err;
|
|
}
|
|
|
|
/* Intentionally reuse the qid for the upcoming first child. */
|
|
child = mlx5e_sw_node_create_leaf(priv, child_classid, node->qid, node);
|
|
if (IS_ERR(child)) {
|
|
err = PTR_ERR(child);
|
|
goto err_destroy_hw_node;
|
|
}
|
|
|
|
child->rate = rate;
|
|
mlx5e_htb_convert_rate(priv, rate, node, &child->bw_share);
|
|
mlx5e_htb_convert_ceil(priv, ceil, &child->max_average_bw);
|
|
|
|
err = mlx5_qos_create_leaf_node(priv->mdev, new_hw_id, child->bw_share,
|
|
child->max_average_bw, &child->hw_id);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Firmware error when creating a leaf node.");
|
|
qos_err(priv->mdev, "Failed to create a leaf node (class %04x), err = %d\n",
|
|
classid, err);
|
|
goto err_delete_sw_node;
|
|
}
|
|
|
|
/* No fail point. */
|
|
|
|
qid = node->qid;
|
|
/* Pairs with mlx5e_get_txq_by_classid. */
|
|
WRITE_ONCE(node->qid, MLX5E_QOS_QID_INNER);
|
|
|
|
if (test_bit(MLX5E_STATE_OPENED, &priv->state)) {
|
|
mlx5e_deactivate_qos_sq(priv, qid);
|
|
mlx5e_close_qos_sq(priv, qid);
|
|
}
|
|
|
|
err = mlx5_qos_destroy_node(priv->mdev, node->hw_id);
|
|
if (err) /* Not fatal. */
|
|
qos_warn(priv->mdev, "Failed to destroy leaf node %u (class %04x), err = %d\n",
|
|
node->hw_id, classid, err);
|
|
|
|
node->hw_id = new_hw_id;
|
|
|
|
if (test_bit(MLX5E_STATE_OPENED, &priv->state)) {
|
|
err = mlx5e_open_qos_sq(priv, &priv->channels, child);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Error creating an SQ.");
|
|
qos_warn(priv->mdev, "Failed to create a QoS SQ (class %04x), err = %d\n",
|
|
classid, err);
|
|
} else {
|
|
mlx5e_activate_qos_sq(priv, child);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_delete_sw_node:
|
|
child->qid = MLX5E_QOS_QID_INNER;
|
|
mlx5e_sw_node_delete(priv, child);
|
|
|
|
err_destroy_hw_node:
|
|
tmp_err = mlx5_qos_destroy_node(priv->mdev, new_hw_id);
|
|
if (tmp_err) /* Not fatal. */
|
|
qos_warn(priv->mdev, "Failed to roll back creation of an inner node %u (class %04x), err = %d\n",
|
|
new_hw_id, classid, tmp_err);
|
|
return err;
|
|
}
|
|
|
|
static struct mlx5e_qos_node *mlx5e_sw_node_find_by_qid(struct mlx5e_priv *priv, u16 qid)
|
|
{
|
|
struct mlx5e_qos_node *node = NULL;
|
|
int bkt;
|
|
|
|
hash_for_each(priv->htb.qos_tc2node, bkt, node, hnode)
|
|
if (node->qid == qid)
|
|
break;
|
|
|
|
return node;
|
|
}
|
|
|
|
static void mlx5e_reactivate_qos_sq(struct mlx5e_priv *priv, u16 qid, struct netdev_queue *txq)
|
|
{
|
|
qos_dbg(priv->mdev, "Reactivate QoS SQ qid %u\n", qid);
|
|
netdev_tx_reset_queue(txq);
|
|
netif_tx_start_queue(txq);
|
|
}
|
|
|
|
static void mlx5e_reset_qdisc(struct net_device *dev, u16 qid)
|
|
{
|
|
struct netdev_queue *dev_queue = netdev_get_tx_queue(dev, qid);
|
|
struct Qdisc *qdisc = dev_queue->qdisc_sleeping;
|
|
|
|
if (!qdisc)
|
|
return;
|
|
|
|
spin_lock_bh(qdisc_lock(qdisc));
|
|
qdisc_reset(qdisc);
|
|
spin_unlock_bh(qdisc_lock(qdisc));
|
|
}
|
|
|
|
int mlx5e_htb_leaf_del(struct mlx5e_priv *priv, u16 *classid,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct mlx5e_qos_node *node;
|
|
struct netdev_queue *txq;
|
|
u16 qid, moved_qid;
|
|
bool opened;
|
|
int err;
|
|
|
|
qos_dbg(priv->mdev, "TC_HTB_LEAF_DEL classid %04x\n", *classid);
|
|
|
|
node = mlx5e_sw_node_find(priv, *classid);
|
|
if (!node)
|
|
return -ENOENT;
|
|
|
|
/* Store qid for reuse. */
|
|
qid = node->qid;
|
|
|
|
opened = test_bit(MLX5E_STATE_OPENED, &priv->state);
|
|
if (opened) {
|
|
txq = netdev_get_tx_queue(priv->netdev,
|
|
mlx5e_qid_from_qos(&priv->channels, qid));
|
|
mlx5e_deactivate_qos_sq(priv, qid);
|
|
mlx5e_close_qos_sq(priv, qid);
|
|
}
|
|
|
|
err = mlx5_qos_destroy_node(priv->mdev, node->hw_id);
|
|
if (err) /* Not fatal. */
|
|
qos_warn(priv->mdev, "Failed to destroy leaf node %u (class %04x), err = %d\n",
|
|
node->hw_id, *classid, err);
|
|
|
|
mlx5e_sw_node_delete(priv, node);
|
|
|
|
moved_qid = mlx5e_qos_cur_leaf_nodes(priv);
|
|
|
|
if (moved_qid == 0) {
|
|
/* The last QoS SQ was just destroyed. */
|
|
if (opened)
|
|
mlx5e_reactivate_qos_sq(priv, qid, txq);
|
|
return 0;
|
|
}
|
|
moved_qid--;
|
|
|
|
if (moved_qid < qid) {
|
|
/* The highest QoS SQ was just destroyed. */
|
|
WARN(moved_qid != qid - 1, "Gaps in queue numeration: destroyed queue %u, the highest queue is %u",
|
|
qid, moved_qid);
|
|
if (opened)
|
|
mlx5e_reactivate_qos_sq(priv, qid, txq);
|
|
return 0;
|
|
}
|
|
|
|
WARN(moved_qid == qid, "Can't move node with qid %u to itself", qid);
|
|
qos_dbg(priv->mdev, "Moving QoS SQ %u to %u\n", moved_qid, qid);
|
|
|
|
node = mlx5e_sw_node_find_by_qid(priv, moved_qid);
|
|
WARN(!node, "Could not find a node with qid %u to move to queue %u",
|
|
moved_qid, qid);
|
|
|
|
/* Stop traffic to the old queue. */
|
|
WRITE_ONCE(node->qid, MLX5E_QOS_QID_INNER);
|
|
__clear_bit(moved_qid, priv->htb.qos_used_qids);
|
|
|
|
if (opened) {
|
|
txq = netdev_get_tx_queue(priv->netdev,
|
|
mlx5e_qid_from_qos(&priv->channels, moved_qid));
|
|
mlx5e_deactivate_qos_sq(priv, moved_qid);
|
|
mlx5e_close_qos_sq(priv, moved_qid);
|
|
}
|
|
|
|
/* Prevent packets from the old class from getting into the new one. */
|
|
mlx5e_reset_qdisc(priv->netdev, moved_qid);
|
|
|
|
__set_bit(qid, priv->htb.qos_used_qids);
|
|
WRITE_ONCE(node->qid, qid);
|
|
|
|
if (test_bit(MLX5E_STATE_OPENED, &priv->state)) {
|
|
err = mlx5e_open_qos_sq(priv, &priv->channels, node);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Error creating an SQ.");
|
|
qos_warn(priv->mdev, "Failed to create a QoS SQ (class %04x) while moving qid %u to %u, err = %d\n",
|
|
node->classid, moved_qid, qid, err);
|
|
} else {
|
|
mlx5e_activate_qos_sq(priv, node);
|
|
}
|
|
}
|
|
|
|
mlx5e_update_tx_netdev_queues(priv);
|
|
if (opened)
|
|
mlx5e_reactivate_qos_sq(priv, moved_qid, txq);
|
|
|
|
*classid = node->classid;
|
|
return 0;
|
|
}
|
|
|
|
int mlx5e_htb_leaf_del_last(struct mlx5e_priv *priv, u16 classid, bool force,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct mlx5e_qos_node *node, *parent;
|
|
u32 old_hw_id, new_hw_id;
|
|
int err, saved_err = 0;
|
|
u16 qid;
|
|
|
|
qos_dbg(priv->mdev, "TC_HTB_LEAF_DEL_LAST%s classid %04x\n",
|
|
force ? "_FORCE" : "", classid);
|
|
|
|
node = mlx5e_sw_node_find(priv, classid);
|
|
if (!node)
|
|
return -ENOENT;
|
|
|
|
err = mlx5_qos_create_leaf_node(priv->mdev, node->parent->parent->hw_id,
|
|
node->parent->bw_share,
|
|
node->parent->max_average_bw,
|
|
&new_hw_id);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Firmware error when creating a leaf node.");
|
|
qos_err(priv->mdev, "Failed to create a leaf node (class %04x), err = %d\n",
|
|
classid, err);
|
|
if (!force)
|
|
return err;
|
|
saved_err = err;
|
|
}
|
|
|
|
/* Store qid for reuse and prevent clearing the bit. */
|
|
qid = node->qid;
|
|
/* Pairs with mlx5e_get_txq_by_classid. */
|
|
WRITE_ONCE(node->qid, MLX5E_QOS_QID_INNER);
|
|
|
|
if (test_bit(MLX5E_STATE_OPENED, &priv->state)) {
|
|
mlx5e_deactivate_qos_sq(priv, qid);
|
|
mlx5e_close_qos_sq(priv, qid);
|
|
}
|
|
|
|
/* Prevent packets from the old class from getting into the new one. */
|
|
mlx5e_reset_qdisc(priv->netdev, qid);
|
|
|
|
err = mlx5_qos_destroy_node(priv->mdev, node->hw_id);
|
|
if (err) /* Not fatal. */
|
|
qos_warn(priv->mdev, "Failed to destroy leaf node %u (class %04x), err = %d\n",
|
|
node->hw_id, classid, err);
|
|
|
|
parent = node->parent;
|
|
mlx5e_sw_node_delete(priv, node);
|
|
|
|
node = parent;
|
|
WRITE_ONCE(node->qid, qid);
|
|
|
|
/* Early return on error in force mode. Parent will still be an inner
|
|
* node to be deleted by a following delete operation.
|
|
*/
|
|
if (saved_err)
|
|
return saved_err;
|
|
|
|
old_hw_id = node->hw_id;
|
|
node->hw_id = new_hw_id;
|
|
|
|
if (test_bit(MLX5E_STATE_OPENED, &priv->state)) {
|
|
err = mlx5e_open_qos_sq(priv, &priv->channels, node);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Error creating an SQ.");
|
|
qos_warn(priv->mdev, "Failed to create a QoS SQ (class %04x), err = %d\n",
|
|
classid, err);
|
|
} else {
|
|
mlx5e_activate_qos_sq(priv, node);
|
|
}
|
|
}
|
|
|
|
err = mlx5_qos_destroy_node(priv->mdev, old_hw_id);
|
|
if (err) /* Not fatal. */
|
|
qos_warn(priv->mdev, "Failed to destroy leaf node %u (class %04x), err = %d\n",
|
|
node->hw_id, classid, err);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mlx5e_qos_update_children(struct mlx5e_priv *priv, struct mlx5e_qos_node *node,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct mlx5e_qos_node *child;
|
|
int err = 0;
|
|
int bkt;
|
|
|
|
hash_for_each(priv->htb.qos_tc2node, bkt, child, hnode) {
|
|
u32 old_bw_share = child->bw_share;
|
|
int err_one;
|
|
|
|
if (child->parent != node)
|
|
continue;
|
|
|
|
mlx5e_htb_convert_rate(priv, child->rate, node, &child->bw_share);
|
|
if (child->bw_share == old_bw_share)
|
|
continue;
|
|
|
|
err_one = mlx5_qos_update_node(priv->mdev, child->hw_id, child->bw_share,
|
|
child->max_average_bw, child->hw_id);
|
|
if (!err && err_one) {
|
|
err = err_one;
|
|
|
|
NL_SET_ERR_MSG_MOD(extack, "Firmware error when modifying a child node.");
|
|
qos_err(priv->mdev, "Failed to modify a child node (class %04x), err = %d\n",
|
|
node->classid, err);
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int mlx5e_htb_node_modify(struct mlx5e_priv *priv, u16 classid, u64 rate, u64 ceil,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
u32 bw_share, max_average_bw;
|
|
struct mlx5e_qos_node *node;
|
|
bool ceil_changed = false;
|
|
int err;
|
|
|
|
qos_dbg(priv->mdev, "TC_HTB_LEAF_MODIFY classid %04x, rate %llu, ceil %llu\n",
|
|
classid, rate, ceil);
|
|
|
|
node = mlx5e_sw_node_find(priv, classid);
|
|
if (!node)
|
|
return -ENOENT;
|
|
|
|
node->rate = rate;
|
|
mlx5e_htb_convert_rate(priv, rate, node->parent, &bw_share);
|
|
mlx5e_htb_convert_ceil(priv, ceil, &max_average_bw);
|
|
|
|
err = mlx5_qos_update_node(priv->mdev, node->parent->hw_id, bw_share,
|
|
max_average_bw, node->hw_id);
|
|
if (err) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Firmware error when modifying a node.");
|
|
qos_err(priv->mdev, "Failed to modify a node (class %04x), err = %d\n",
|
|
classid, err);
|
|
return err;
|
|
}
|
|
|
|
if (max_average_bw != node->max_average_bw)
|
|
ceil_changed = true;
|
|
|
|
node->bw_share = bw_share;
|
|
node->max_average_bw = max_average_bw;
|
|
|
|
if (ceil_changed)
|
|
err = mlx5e_qos_update_children(priv, node, extack);
|
|
|
|
return err;
|
|
}
|
|
|
|
struct mlx5e_mqprio_rl {
|
|
struct mlx5_core_dev *mdev;
|
|
u32 root_id;
|
|
u32 *leaves_id;
|
|
u8 num_tc;
|
|
};
|
|
|
|
struct mlx5e_mqprio_rl *mlx5e_mqprio_rl_alloc(void)
|
|
{
|
|
return kvzalloc(sizeof(struct mlx5e_mqprio_rl), GFP_KERNEL);
|
|
}
|
|
|
|
void mlx5e_mqprio_rl_free(struct mlx5e_mqprio_rl *rl)
|
|
{
|
|
kvfree(rl);
|
|
}
|
|
|
|
int mlx5e_mqprio_rl_init(struct mlx5e_mqprio_rl *rl, struct mlx5_core_dev *mdev, u8 num_tc,
|
|
u64 max_rate[])
|
|
{
|
|
int err;
|
|
int tc;
|
|
|
|
if (!mlx5_qos_is_supported(mdev)) {
|
|
qos_warn(mdev, "Missing QoS capabilities. Try disabling SRIOV or use a supported device.");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
if (num_tc > mlx5e_qos_max_leaf_nodes(mdev))
|
|
return -EINVAL;
|
|
|
|
rl->mdev = mdev;
|
|
rl->num_tc = num_tc;
|
|
rl->leaves_id = kvcalloc(num_tc, sizeof(*rl->leaves_id), GFP_KERNEL);
|
|
if (!rl->leaves_id)
|
|
return -ENOMEM;
|
|
|
|
err = mlx5_qos_create_root_node(mdev, &rl->root_id);
|
|
if (err)
|
|
goto err_free_leaves;
|
|
|
|
qos_dbg(mdev, "Root created, id %#x\n", rl->root_id);
|
|
|
|
for (tc = 0; tc < num_tc; tc++) {
|
|
u32 max_average_bw;
|
|
|
|
max_average_bw = mlx5e_qos_bytes2mbits(mdev, max_rate[tc]);
|
|
err = mlx5_qos_create_leaf_node(mdev, rl->root_id, 0, max_average_bw,
|
|
&rl->leaves_id[tc]);
|
|
if (err)
|
|
goto err_destroy_leaves;
|
|
|
|
qos_dbg(mdev, "Leaf[%d] created, id %#x, max average bw %u Mbits/sec\n",
|
|
tc, rl->leaves_id[tc], max_average_bw);
|
|
}
|
|
return 0;
|
|
|
|
err_destroy_leaves:
|
|
while (--tc >= 0)
|
|
mlx5_qos_destroy_node(mdev, rl->leaves_id[tc]);
|
|
mlx5_qos_destroy_node(mdev, rl->root_id);
|
|
err_free_leaves:
|
|
kvfree(rl->leaves_id);
|
|
return err;
|
|
}
|
|
|
|
void mlx5e_mqprio_rl_cleanup(struct mlx5e_mqprio_rl *rl)
|
|
{
|
|
int tc;
|
|
|
|
for (tc = 0; tc < rl->num_tc; tc++)
|
|
mlx5_qos_destroy_node(rl->mdev, rl->leaves_id[tc]);
|
|
mlx5_qos_destroy_node(rl->mdev, rl->root_id);
|
|
kvfree(rl->leaves_id);
|
|
}
|
|
|
|
int mlx5e_mqprio_rl_get_node_hw_id(struct mlx5e_mqprio_rl *rl, int tc, u32 *hw_id)
|
|
{
|
|
if (tc >= rl->num_tc)
|
|
return -EINVAL;
|
|
|
|
*hw_id = rl->leaves_id[tc];
|
|
return 0;
|
|
}
|