1/* 2 * Copyright (c) 2007, 2014 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 39#include <debug.h> 40 41#include "mlx4_en.h" 42 43static void mlx4_en_cq_event(struct mlx4_cq *cq, enum mlx4_event event) { 44 return; 45} 46 47int mlx4_en_create_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq **pcq, 48 int entries, int ring, enum cq_type mode, int node) { 49 struct mlx4_en_dev *mdev = priv->mdev; 50 struct mlx4_en_cq *cq; 51 int err; 52 53 /*cq = kzalloc_node(sizeof(struct mlx4_en_cq), GFP_KERNEL, node); 54 if (!cq) {*/ 55 cq = calloc(1, sizeof(struct mlx4_en_cq)); 56 if (!cq) { 57 MLX4_ERR("Failed to allocate CW struture\n"); 58 return -ENOMEM; 59 } 60 /*}*/ 61 62 cq->size = entries; 63 cq->buf_size = cq->size * mdev->dev->caps.cqe_size; 64 65 /*printf("cq->buf_size: %d; mdev->dev->caps.cqe_size: %d\n", cq->buf_size, mdev->dev->caps.cqe_size);*/ 66 67 /*TODO: launch mlx4_en_rx_que or mlx4_en_tx_que*/ 68 /*cq->tq = taskqueue_create_fast("mlx4_en_que", M_NOWAIT, 69 taskqueue_thread_enqueue, &cq->tq); 70 if (mode == RX) { 71 TASK_INIT(&cq->cq_task, 0, mlx4_en_rx_que, cq); 72 taskqueue_start_threads(&cq->tq, 1, PI_NET, "%s rx cq", 73 if_name(priv->dev)); 74 75 } else { 76 TASK_INIT(&cq->cq_task, 0, mlx4_en_tx_que, cq); 77 taskqueue_start_threads(&cq->tq, 1, PI_NET, "%s tx cq", 78 if_name(priv->dev)); 79 }*/ 80 81 cq->ring = ring; 82 cq->is_tx = mode; 83 /*spin_lock_init(&cq->lock);*/ 84 85 err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres, cq->buf_size, 86 2 * BASE_PAGE_SIZE); 87 if (err) 88 goto err_cq; 89 90 err = mlx4_en_map_buffer(&cq->wqres.buf); 91 if (err) 92 goto err_res; 93 94 cq->buf = (struct mlx4_cqe *) cq->wqres.buf.direct.buf; 95 *pcq = cq; 96 97 return 0; 98 99 err_res: /*mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);*/ 100 err_cq: free(cq); 101 return err; 102} 103 104int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq, 105 int cq_idx) { 106 struct mlx4_en_dev *mdev = priv->mdev; 107 int err = 0; 108 /*char name[25];*/ 109 int timestamp_en = 0; 110 111 cq->dev = priv;//mdev->pndev[priv->port]; 112 debug_printf("%s.%d: %p\n", __func__, __LINE__, cq->dev); 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", "mlxen", cq->ring); 123 Set IRQ for specific name (per ring) 124 if (mlx4_assign_eq(mdev->dev, name, &cq->vector)) { 125 cq->vector = (cq->ring + 1 + priv->port) 126 % mdev->dev->caps.num_comp_vectors; 127 mlx4_warn(mdev, "Failed Assigning an EQ to " 128 "%s ,Falling back to legacy EQ's\n", name); 129 } 130 } 131 } else {*/ 132 cq->vector = (cq->ring + 1 + priv->port) 133 % mdev->dev->caps.num_comp_vectors; 134 /*}*/ 135 } else { 136 struct mlx4_en_cq *rx_cq; 137 138 /** For TX we use the same irq per 139 * ring we assigned for the RX*/ 140 141 cq_idx = cq_idx % priv->rx_ring_num; 142 rx_cq = priv->rx_cq[cq_idx]; 143 cq->vector = rx_cq->vector; 144 } 145 146 if (!cq->is_tx) 147 cq->size = priv->rx_ring[cq->ring]->actual_size; 148 err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar, 149 cq->wqres.db.dma, &cq->mcq, cq->vector, 0, timestamp_en); 150 if (err) 151 return err; 152 153 /*TODO: implement it*/ 154 cq->mcq.comp = cq->is_tx ? mlx4_en_tx_irq :mlx4_en_rx_irq; 155 cq->mcq.event = mlx4_en_cq_event; 156 157 /*if (cq->is_tx) { 158 init_timer(&cq->timer); 159 cq->timer.function = mlx4_en_poll_tx_cq; 160 cq->timer.data = (unsigned long) cq; 161 }*/ 162 163 return 0; 164} 165/* 166 void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq **pcq) 167 { 168 struct mlx4_en_dev *mdev = priv->mdev; 169 struct mlx4_en_cq *cq = *pcq; 170 171 taskqueue_drain(cq->tq, &cq->cq_task); 172 taskqueue_free(cq->tq); 173 mlx4_en_unmap_buffer(&cq->wqres.buf); 174 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); 175 if (priv->mdev->dev->caps.comp_pool && cq->vector) 176 mlx4_release_eq(priv->mdev->dev, cq->vector); 177 kfree(cq); 178 *pcq = NULL; 179 } 180 181 void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 182 { 183 struct mlx4_en_dev *mdev = priv->mdev; 184 185 taskqueue_drain(cq->tq, &cq->cq_task); 186 if (cq->is_tx) 187 del_timer(&cq->timer); 188 189 mlx4_cq_free(mdev->dev, &cq->mcq); 190 } 191 192 193 Set rx cq moderation parameters 194 int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 195 { 196 return mlx4_cq_modify(priv->mdev->dev, &cq->mcq, 197 cq->moder_cnt, cq->moder_time); 198 } 199 */ 200int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) { 201 mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map/*, 202 &priv->mdev->uar_lock*/); 203 204 return 0; 205} 206