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 cq = kzalloc(sizeof(*cq), GFP_KERNEL); 58 if (!cq) { 59 en_err(priv, "Failed to allocate CQ structure\n"); 60 return -ENOMEM; 61 } 62 } 63 64 cq->size = entries; 65 cq->buf_size = cq->size * mdev->dev->caps.cqe_size; 66 67 cq->ring = ring; 68 cq->is_tx = mode; 69 spin_lock_init(&cq->lock); 70 71 /* Allocate HW buffers on provided NUMA node. 72 * dev->numa_node is used in mtt range allocation flow. 73 */ 74 set_dev_node(&mdev->dev->pdev->dev, node); 75 err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres, 76 cq->buf_size, 2 * PAGE_SIZE); 77 set_dev_node(&mdev->dev->pdev->dev, mdev->dev->numa_node); 78 if (err) 79 goto err_cq; 80 81 err = mlx4_en_map_buffer(&cq->wqres.buf); 82 if (err) 83 goto err_res; 84 85 cq->buf = (struct mlx4_cqe *)cq->wqres.buf.direct.buf; 86 *pcq = cq; 87 88 return 0; 89 90 err_res: 91 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); 92 err_cq: 93 kfree(cq); 94 *pcq = NULL; 95 return err; 96 } 97 98 int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq, 99 int cq_idx) 100 { 101 struct mlx4_en_dev *mdev = priv->mdev; 102 int err = 0; 103 char name[25]; 104 int timestamp_en = 0; 105 struct cpu_rmap *rmap = 106 #ifdef CONFIG_RFS_ACCEL 107 priv->dev->rx_cpu_rmap; 108 #else 109 NULL; 110 #endif 111 112 cq->dev = mdev->pndev[priv->port]; 113 cq->mcq.set_ci_db = cq->wqres.db.db; 114 cq->mcq.arm_db = cq->wqres.db.db + 1; 115 *cq->mcq.set_ci_db = 0; 116 *cq->mcq.arm_db = 0; 117 memset(cq->buf, 0, cq->buf_size); 118 119 if (cq->is_tx == RX) { 120 if (mdev->dev->caps.comp_pool) { 121 if (!cq->vector) { 122 sprintf(name, "%s-%d", priv->dev->name, 123 cq->ring); 124 /* Set IRQ for specific name (per ring) */ 125 if (mlx4_assign_eq(mdev->dev, name, rmap, 126 &cq->vector)) { 127 cq->vector = (cq->ring + 1 + priv->port) 128 % mdev->dev->caps.num_comp_vectors; 129 mlx4_warn(mdev, "Failed Assigning an EQ to " 130 "%s ,Falling back to legacy EQ's\n", 131 name); 132 } 133 } 134 } else { 135 cq->vector = (cq->ring + 1 + priv->port) % 136 mdev->dev->caps.num_comp_vectors; 137 } 138 } else { 139 /* For TX we use the same irq per 140 ring we assigned for the RX */ 141 struct mlx4_en_cq *rx_cq; 142 143 cq_idx = cq_idx % priv->rx_ring_num; 144 rx_cq = priv->rx_cq[cq_idx]; 145 cq->vector = rx_cq->vector; 146 } 147 148 if (!cq->is_tx) 149 cq->size = priv->rx_ring[cq->ring]->actual_size; 150 151 if ((cq->is_tx && priv->hwtstamp_config.tx_type) || 152 (!cq->is_tx && priv->hwtstamp_config.rx_filter)) 153 timestamp_en = 1; 154 155 err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, 156 &mdev->priv_uar, cq->wqres.db.dma, &cq->mcq, 157 cq->vector, 0, timestamp_en); 158 if (err) 159 return err; 160 161 cq->mcq.comp = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq; 162 cq->mcq.event = mlx4_en_cq_event; 163 164 if (cq->is_tx) { 165 netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_tx_cq, 166 NAPI_POLL_WEIGHT); 167 } else { 168 netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64); 169 napi_hash_add(&cq->napi); 170 } 171 172 napi_enable(&cq->napi); 173 174 return 0; 175 } 176 177 void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq **pcq) 178 { 179 struct mlx4_en_dev *mdev = priv->mdev; 180 struct mlx4_en_cq *cq = *pcq; 181 182 mlx4_en_unmap_buffer(&cq->wqres.buf); 183 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); 184 if (priv->mdev->dev->caps.comp_pool && cq->vector) 185 mlx4_release_eq(priv->mdev->dev, cq->vector); 186 cq->vector = 0; 187 cq->buf_size = 0; 188 cq->buf = NULL; 189 kfree(cq); 190 *pcq = NULL; 191 } 192 193 void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 194 { 195 napi_disable(&cq->napi); 196 if (!cq->is_tx) { 197 napi_hash_del(&cq->napi); 198 synchronize_rcu(); 199 } 200 netif_napi_del(&cq->napi); 201 202 mlx4_cq_free(priv->mdev->dev, &cq->mcq); 203 } 204 205 /* Set rx cq moderation parameters */ 206 int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 207 { 208 return mlx4_cq_modify(priv->mdev->dev, &cq->mcq, 209 cq->moder_cnt, cq->moder_time); 210 } 211 212 int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 213 { 214 mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map, 215 &priv->mdev->uar_lock); 216 217 return 0; 218 } 219 220 221