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 70 /* Allocate HW buffers on provided NUMA node. 71 * dev->numa_node is used in mtt range allocation flow. 72 */ 73 set_dev_node(&mdev->dev->pdev->dev, node); 74 err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres, 75 cq->buf_size, 2 * PAGE_SIZE); 76 set_dev_node(&mdev->dev->pdev->dev, mdev->dev->numa_node); 77 if (err) 78 goto err_cq; 79 80 err = mlx4_en_map_buffer(&cq->wqres.buf); 81 if (err) 82 goto err_res; 83 84 cq->buf = (struct mlx4_cqe *)cq->wqres.buf.direct.buf; 85 *pcq = cq; 86 87 return 0; 88 89 err_res: 90 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); 91 err_cq: 92 kfree(cq); 93 *pcq = NULL; 94 return err; 95 } 96 97 int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq, 98 int cq_idx) 99 { 100 struct mlx4_en_dev *mdev = priv->mdev; 101 int err = 0; 102 char name[25]; 103 int timestamp_en = 0; 104 struct cpu_rmap *rmap = 105 #ifdef CONFIG_RFS_ACCEL 106 priv->dev->rx_cpu_rmap; 107 #else 108 NULL; 109 #endif 110 111 cq->dev = mdev->pndev[priv->port]; 112 cq->mcq.set_ci_db = cq->wqres.db.db; 113 cq->mcq.arm_db = cq->wqres.db.db + 1; 114 *cq->mcq.set_ci_db = 0; 115 *cq->mcq.arm_db = 0; 116 memset(cq->buf, 0, cq->buf_size); 117 118 if (cq->is_tx == RX) { 119 if (mdev->dev->caps.comp_pool) { 120 if (!cq->vector) { 121 sprintf(name, "%s-%d", priv->dev->name, 122 cq->ring); 123 /* Set IRQ for specific name (per ring) */ 124 if (mlx4_assign_eq(mdev->dev, name, rmap, 125 &cq->vector)) { 126 cq->vector = (cq->ring + 1 + priv->port) 127 % mdev->dev->caps.num_comp_vectors; 128 mlx4_warn(mdev, "Failed assigning an EQ to %s, falling back to legacy EQ's\n", 129 name); 130 } 131 132 } 133 } else { 134 cq->vector = (cq->ring + 1 + priv->port) % 135 mdev->dev->caps.num_comp_vectors; 136 } 137 138 cq->irq_desc = 139 irq_to_desc(mlx4_eq_get_irq(mdev->dev, 140 cq->vector)); 141 } else { 142 /* For TX we use the same irq per 143 ring we assigned for the RX */ 144 struct mlx4_en_cq *rx_cq; 145 146 cq_idx = cq_idx % priv->rx_ring_num; 147 rx_cq = priv->rx_cq[cq_idx]; 148 cq->vector = rx_cq->vector; 149 } 150 151 if (!cq->is_tx) 152 cq->size = priv->rx_ring[cq->ring]->actual_size; 153 154 if ((cq->is_tx && priv->hwtstamp_config.tx_type) || 155 (!cq->is_tx && priv->hwtstamp_config.rx_filter)) 156 timestamp_en = 1; 157 158 err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, 159 &mdev->priv_uar, cq->wqres.db.dma, &cq->mcq, 160 cq->vector, 0, timestamp_en); 161 if (err) 162 return err; 163 164 cq->mcq.comp = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq; 165 cq->mcq.event = mlx4_en_cq_event; 166 167 if (cq->is_tx) { 168 netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_tx_cq, 169 NAPI_POLL_WEIGHT); 170 } else { 171 struct mlx4_en_rx_ring *ring = priv->rx_ring[cq->ring]; 172 173 err = irq_set_affinity_hint(cq->mcq.irq, 174 ring->affinity_mask); 175 if (err) 176 mlx4_warn(mdev, "Failed setting affinity hint\n"); 177 178 netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64); 179 napi_hash_add(&cq->napi); 180 } 181 182 napi_enable(&cq->napi); 183 184 return 0; 185 } 186 187 void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq **pcq) 188 { 189 struct mlx4_en_dev *mdev = priv->mdev; 190 struct mlx4_en_cq *cq = *pcq; 191 192 mlx4_en_unmap_buffer(&cq->wqres.buf); 193 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); 194 if (priv->mdev->dev->caps.comp_pool && cq->vector) { 195 mlx4_release_eq(priv->mdev->dev, cq->vector); 196 } 197 cq->vector = 0; 198 cq->buf_size = 0; 199 cq->buf = NULL; 200 kfree(cq); 201 *pcq = NULL; 202 } 203 204 void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 205 { 206 napi_disable(&cq->napi); 207 if (!cq->is_tx) { 208 napi_hash_del(&cq->napi); 209 synchronize_rcu(); 210 irq_set_affinity_hint(cq->mcq.irq, NULL); 211 } 212 netif_napi_del(&cq->napi); 213 214 mlx4_cq_free(priv->mdev->dev, &cq->mcq); 215 } 216 217 /* Set rx cq moderation parameters */ 218 int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 219 { 220 return mlx4_cq_modify(priv->mdev->dev, &cq->mcq, 221 cq->moder_cnt, cq->moder_time); 222 } 223 224 int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 225 { 226 mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map, 227 &priv->mdev->uar_lock); 228 229 return 0; 230 } 231 232 233