528 lines
13 KiB
C
528 lines
13 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 <net/pkt_cls.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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#include "en/htb.h"
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struct qos_sq_callback_params {
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struct mlx5e_priv *priv;
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struct mlx5e_channels *chs;
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};
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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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/* TX datapath API */
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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 selq->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 selq->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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/* SQ lifecycle */
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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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int mlx5e_open_qos_sq(struct mlx5e_priv *priv, struct mlx5e_channels *chs,
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u16 node_qid, u32 hw_id)
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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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u32 tisn;
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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 >= mlx5e_htb_cur_leaf_nodes(priv->htb));
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if (!priv->htb_qos_sq_stats) {
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struct mlx5e_sq_stats **stats_list;
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stats_list = kvcalloc(mlx5e_qos_max_leaf_nodes(priv->mdev),
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sizeof(*stats_list), GFP_KERNEL);
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if (!stats_list)
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return -ENOMEM;
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WRITE_ONCE(priv->htb_qos_sq_stats, stats_list);
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}
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if (!priv->htb_qos_sq_stats[node_qid]) {
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struct mlx5e_sq_stats *stats;
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stats = kzalloc(sizeof(*stats), GFP_KERNEL);
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if (!stats)
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return -ENOMEM;
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WRITE_ONCE(priv->htb_qos_sq_stats[node_qid], stats);
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/* Order htb_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(c->mdev, 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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tisn = mlx5e_profile_get_tisn(c->mdev, c->priv, c->priv->profile,
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c->lag_port, 0);
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err = mlx5e_open_txqsq(c, tisn, txq_ix, params, ¶m_sq, sq, 0, 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 int mlx5e_open_qos_sq_cb_wrapper(void *data, u16 node_qid, u32 hw_id)
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{
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struct qos_sq_callback_params *cb_params = data;
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return mlx5e_open_qos_sq(cb_params->priv, cb_params->chs, node_qid, hw_id);
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}
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int mlx5e_activate_qos_sq(void *data, u16 node_qid, u32 hw_id)
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{
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struct mlx5e_priv *priv = data;
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struct mlx5e_txqsq *sq;
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u16 qid;
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sq = mlx5e_get_qos_sq(priv, node_qid);
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qid = mlx5e_qid_from_qos(&priv->channels, node_qid);
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/* If it's a new queue, it will be marked as started at this point.
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* Stop it before updating txq2sq.
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*/
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mlx5e_tx_disable_queue(netdev_get_tx_queue(priv->netdev, qid));
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priv->txq2sq[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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return 0;
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}
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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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priv->txq2sq[mlx5e_qid_from_qos(&priv->channels, qid)] = NULL;
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/* Make the change to txq2sq visible before the queue is started again.
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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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}
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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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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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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 qos_sq_callback_params callback_params;
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int err;
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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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callback_params.priv = priv;
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callback_params.chs = chs;
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err = mlx5e_htb_enumerate_leaves(priv->htb, mlx5e_open_qos_sq_cb_wrapper, &callback_params);
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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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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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mlx5e_htb_enumerate_leaves(priv->htb, mlx5e_activate_qos_sq, priv);
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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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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++)
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mlx5e_qos_deactivate_queues(chs->c[i]);
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}
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void mlx5e_reactivate_qos_sq(struct mlx5e_priv *priv, u16 qid, struct netdev_queue *txq)
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{
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qos_dbg(priv->mdev, "Reactivate QoS SQ qid %u\n", qid);
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netdev_tx_reset_queue(txq);
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netif_tx_start_queue(txq);
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}
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void mlx5e_reset_qdisc(struct net_device *dev, u16 qid)
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{
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struct netdev_queue *dev_queue = netdev_get_tx_queue(dev, qid);
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struct Qdisc *qdisc = dev_queue->qdisc_sleeping;
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if (!qdisc)
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return;
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spin_lock_bh(qdisc_lock(qdisc));
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qdisc_reset(qdisc);
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spin_unlock_bh(qdisc_lock(qdisc));
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}
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int mlx5e_htb_setup_tc(struct mlx5e_priv *priv, struct tc_htb_qopt_offload *htb_qopt)
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{
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struct mlx5e_htb *htb = priv->htb;
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int res;
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if (!htb && htb_qopt->command != TC_HTB_CREATE)
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return -EINVAL;
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if (htb_qopt->prio || htb_qopt->quantum) {
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NL_SET_ERR_MSG_MOD(htb_qopt->extack,
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"prio and quantum parameters are not supported by device with HTB offload enabled.");
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return -EOPNOTSUPP;
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}
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switch (htb_qopt->command) {
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case TC_HTB_CREATE:
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if (!mlx5_qos_is_supported(priv->mdev)) {
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NL_SET_ERR_MSG_MOD(htb_qopt->extack,
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"Missing QoS capabilities. Try disabling SRIOV or use a supported device.");
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return -EOPNOTSUPP;
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}
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priv->htb = mlx5e_htb_alloc();
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htb = priv->htb;
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if (!htb)
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return -ENOMEM;
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res = mlx5e_htb_init(htb, htb_qopt, priv->netdev, priv->mdev, &priv->selq, priv);
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if (res) {
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mlx5e_htb_free(htb);
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priv->htb = NULL;
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}
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return res;
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case TC_HTB_DESTROY:
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mlx5e_htb_cleanup(htb);
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mlx5e_htb_free(htb);
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priv->htb = NULL;
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return 0;
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case TC_HTB_LEAF_ALLOC_QUEUE:
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res = mlx5e_htb_leaf_alloc_queue(htb, htb_qopt->classid, htb_qopt->parent_classid,
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htb_qopt->rate, htb_qopt->ceil, htb_qopt->extack);
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if (res < 0)
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return res;
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htb_qopt->qid = res;
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return 0;
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case TC_HTB_LEAF_TO_INNER:
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return mlx5e_htb_leaf_to_inner(htb, htb_qopt->parent_classid, htb_qopt->classid,
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htb_qopt->rate, htb_qopt->ceil, htb_qopt->extack);
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case TC_HTB_LEAF_DEL:
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return mlx5e_htb_leaf_del(htb, &htb_qopt->classid, htb_qopt->extack);
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case TC_HTB_LEAF_DEL_LAST:
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case TC_HTB_LEAF_DEL_LAST_FORCE:
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return mlx5e_htb_leaf_del_last(htb, htb_qopt->classid,
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htb_qopt->command == TC_HTB_LEAF_DEL_LAST_FORCE,
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htb_qopt->extack);
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case TC_HTB_NODE_MODIFY:
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return mlx5e_htb_node_modify(htb, htb_qopt->classid, htb_qopt->rate, htb_qopt->ceil,
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htb_qopt->extack);
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case TC_HTB_LEAF_QUERY_QUEUE:
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res = mlx5e_htb_get_txq_by_classid(htb, htb_qopt->classid);
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if (res < 0)
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return res;
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htb_qopt->qid = res;
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return 0;
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default:
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return -EOPNOTSUPP;
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}
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}
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struct mlx5e_mqprio_rl {
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struct mlx5_core_dev *mdev;
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u32 root_id;
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u32 *leaves_id;
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u8 num_tc;
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};
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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;
|
|
}
|