1 /* 2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 * 32 */ 33 34 #include <linux/mlx4/cq.h> 35 #include <linux/mlx4/qp.h> 36 #include <linux/mlx4/cmd.h> 37 38 #include "mlx4_en.h" 39 40 static void mlx4_en_cq_event(struct mlx4_cq *cq, enum mlx4_event event) 41 { 42 return; 43 } 44 45 46 int mlx4_en_create_cq(struct mlx4_en_priv *priv, 47 struct mlx4_en_cq **pcq, 48 int entries, int ring, enum cq_type mode, 49 int node) 50 { 51 struct mlx4_en_dev *mdev = priv->mdev; 52 struct mlx4_en_cq *cq; 53 int err; 54 55 cq = kzalloc_node(sizeof(*cq), GFP_KERNEL, node); 56 if (!cq) { 57 en_err(priv, "Failed to allocate CQ structure\n"); 58 return -ENOMEM; 59 } 60 61 cq->size = entries; 62 cq->buf_size = cq->size * mdev->dev->caps.cqe_size; 63 64 cq->ring = ring; 65 cq->type = mode; 66 cq->vector = mdev->dev->caps.num_comp_vectors; 67 68 /* Allocate HW buffers on provided NUMA node. 69 * dev->numa_node is used in mtt range allocation flow. 70 */ 71 set_dev_node(&mdev->dev->persist->pdev->dev, node); 72 err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres, 73 cq->buf_size); 74 set_dev_node(&mdev->dev->persist->pdev->dev, mdev->dev->numa_node); 75 if (err) 76 goto err_cq; 77 78 cq->buf = (struct mlx4_cqe *)cq->wqres.buf.direct.buf; 79 *pcq = cq; 80 81 return 0; 82 83 err_cq: 84 kfree(cq); 85 *pcq = NULL; 86 return err; 87 } 88 89 int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq, 90 int cq_idx) 91 { 92 struct mlx4_en_dev *mdev = priv->mdev; 93 int irq, err = 0; 94 int timestamp_en = 0; 95 bool assigned_eq = false; 96 97 cq->dev = mdev->pndev[priv->port]; 98 cq->mcq.set_ci_db = cq->wqres.db.db; 99 cq->mcq.arm_db = cq->wqres.db.db + 1; 100 *cq->mcq.set_ci_db = 0; 101 *cq->mcq.arm_db = 0; 102 memset(cq->buf, 0, cq->buf_size); 103 104 if (cq->type == RX) { 105 if (!mlx4_is_eq_vector_valid(mdev->dev, priv->port, 106 cq->vector)) { 107 cq->vector = cpumask_first(priv->rx_ring[cq->ring]->affinity_mask); 108 109 err = mlx4_assign_eq(mdev->dev, priv->port, 110 &cq->vector); 111 if (err) { 112 mlx4_err(mdev, "Failed assigning an EQ to CQ vector %d\n", 113 cq->vector); 114 goto free_eq; 115 } 116 117 assigned_eq = true; 118 } 119 irq = mlx4_eq_get_irq(mdev->dev, cq->vector); 120 cq->aff_mask = irq_get_effective_affinity_mask(irq); 121 } else { 122 /* For TX we use the same irq per 123 ring we assigned for the RX */ 124 struct mlx4_en_cq *rx_cq; 125 126 cq_idx = cq_idx % priv->rx_ring_num; 127 rx_cq = priv->rx_cq[cq_idx]; 128 cq->vector = rx_cq->vector; 129 } 130 131 if (cq->type == RX) 132 cq->size = priv->rx_ring[cq->ring]->actual_size; 133 134 if ((cq->type != RX && priv->hwtstamp_config.tx_type) || 135 (cq->type == RX && priv->hwtstamp_config.rx_filter)) 136 timestamp_en = 1; 137 138 cq->mcq.usage = MLX4_RES_USAGE_DRIVER; 139 err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, 140 &mdev->priv_uar, cq->wqres.db.dma, &cq->mcq, 141 cq->vector, 0, timestamp_en, &cq->wqres.buf, false); 142 if (err) 143 goto free_eq; 144 145 cq->mcq.event = mlx4_en_cq_event; 146 147 switch (cq->type) { 148 case TX: 149 cq->mcq.comp = mlx4_en_tx_irq; 150 netif_napi_add_tx(cq->dev, &cq->napi, mlx4_en_poll_tx_cq); 151 napi_enable(&cq->napi); 152 break; 153 case RX: 154 cq->mcq.comp = mlx4_en_rx_irq; 155 netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq); 156 napi_enable(&cq->napi); 157 break; 158 case TX_XDP: 159 /* nothing regarding napi, it's shared with rx ring */ 160 cq->xdp_busy = false; 161 break; 162 } 163 164 return 0; 165 166 free_eq: 167 if (assigned_eq) 168 mlx4_release_eq(mdev->dev, cq->vector); 169 cq->vector = mdev->dev->caps.num_comp_vectors; 170 return err; 171 } 172 173 void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq **pcq) 174 { 175 struct mlx4_en_dev *mdev = priv->mdev; 176 struct mlx4_en_cq *cq = *pcq; 177 178 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); 179 if (mlx4_is_eq_vector_valid(mdev->dev, priv->port, cq->vector) && 180 cq->type == RX) 181 mlx4_release_eq(priv->mdev->dev, cq->vector); 182 cq->vector = 0; 183 cq->buf_size = 0; 184 cq->buf = NULL; 185 kfree(cq); 186 *pcq = NULL; 187 } 188 189 void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 190 { 191 if (cq->type != TX_XDP) { 192 napi_disable(&cq->napi); 193 netif_napi_del(&cq->napi); 194 } 195 196 mlx4_cq_free(priv->mdev->dev, &cq->mcq); 197 } 198 199 /* Set rx cq moderation parameters */ 200 int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 201 { 202 return mlx4_cq_modify(priv->mdev->dev, &cq->mcq, 203 cq->moder_cnt, cq->moder_time); 204 } 205 206 void mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 207 { 208 mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map, 209 &priv->mdev->uar_lock); 210 } 211 212 213