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 *cq, 48 int entries, int ring, enum cq_type mode) 49 { 50 struct mlx4_en_dev *mdev = priv->mdev; 51 int err; 52 53 cq->size = entries; 54 if (mode == RX) 55 cq->buf_size = cq->size * sizeof(struct mlx4_cqe); 56 else 57 cq->buf_size = sizeof(struct mlx4_cqe); 58 59 cq->ring = ring; 60 cq->is_tx = mode; 61 spin_lock_init(&cq->lock); 62 63 err = mlx4_alloc_hwq_res(mdev->dev, &cq->wqres, 64 cq->buf_size, 2 * PAGE_SIZE); 65 if (err) 66 return err; 67 68 err = mlx4_en_map_buffer(&cq->wqres.buf); 69 if (err) 70 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); 71 else 72 cq->buf = (struct mlx4_cqe *) cq->wqres.buf.direct.buf; 73 74 return err; 75 } 76 77 int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq, 78 int cq_idx) 79 { 80 struct mlx4_en_dev *mdev = priv->mdev; 81 int err = 0; 82 char name[25]; 83 84 cq->dev = mdev->pndev[priv->port]; 85 cq->mcq.set_ci_db = cq->wqres.db.db; 86 cq->mcq.arm_db = cq->wqres.db.db + 1; 87 *cq->mcq.set_ci_db = 0; 88 *cq->mcq.arm_db = 0; 89 memset(cq->buf, 0, cq->buf_size); 90 91 if (cq->is_tx == RX) { 92 if (mdev->dev->caps.comp_pool) { 93 if (!cq->vector) { 94 sprintf(name, "%s-%d", priv->dev->name, 95 cq->ring); 96 /* Set IRQ for specific name (per ring) */ 97 if (mlx4_assign_eq(mdev->dev, name, &cq->vector)) { 98 cq->vector = (cq->ring + 1 + priv->port) 99 % mdev->dev->caps.num_comp_vectors; 100 mlx4_warn(mdev, "Failed Assigning an EQ to " 101 "%s ,Falling back to legacy EQ's\n", 102 name); 103 } 104 } 105 } else { 106 cq->vector = (cq->ring + 1 + priv->port) % 107 mdev->dev->caps.num_comp_vectors; 108 } 109 } else { 110 /* For TX we use the same irq per 111 ring we assigned for the RX */ 112 struct mlx4_en_cq *rx_cq; 113 114 cq_idx = cq_idx % priv->rx_ring_num; 115 rx_cq = &priv->rx_cq[cq_idx]; 116 cq->vector = rx_cq->vector; 117 } 118 119 if (!cq->is_tx) 120 cq->size = priv->rx_ring[cq->ring].actual_size; 121 122 err = mlx4_cq_alloc(mdev->dev, cq->size, &cq->wqres.mtt, &mdev->priv_uar, 123 cq->wqres.db.dma, &cq->mcq, cq->vector, cq->is_tx); 124 if (err) 125 return err; 126 127 cq->mcq.comp = cq->is_tx ? mlx4_en_tx_irq : mlx4_en_rx_irq; 128 cq->mcq.event = mlx4_en_cq_event; 129 130 if (cq->is_tx) { 131 init_timer(&cq->timer); 132 cq->timer.function = mlx4_en_poll_tx_cq; 133 cq->timer.data = (unsigned long) cq; 134 } else { 135 netif_napi_add(cq->dev, &cq->napi, mlx4_en_poll_rx_cq, 64); 136 napi_enable(&cq->napi); 137 } 138 139 return 0; 140 } 141 142 void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 143 { 144 struct mlx4_en_dev *mdev = priv->mdev; 145 146 mlx4_en_unmap_buffer(&cq->wqres.buf); 147 mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size); 148 if (priv->mdev->dev->caps.comp_pool && cq->vector) 149 mlx4_release_eq(priv->mdev->dev, cq->vector); 150 cq->buf_size = 0; 151 cq->buf = NULL; 152 } 153 154 void mlx4_en_deactivate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 155 { 156 struct mlx4_en_dev *mdev = priv->mdev; 157 158 if (cq->is_tx) 159 del_timer(&cq->timer); 160 else { 161 napi_disable(&cq->napi); 162 netif_napi_del(&cq->napi); 163 } 164 165 mlx4_cq_free(mdev->dev, &cq->mcq); 166 } 167 168 /* Set rx cq moderation parameters */ 169 int mlx4_en_set_cq_moder(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 170 { 171 return mlx4_cq_modify(priv->mdev->dev, &cq->mcq, 172 cq->moder_cnt, cq->moder_time); 173 } 174 175 int mlx4_en_arm_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq) 176 { 177 mlx4_cq_arm(&cq->mcq, MLX4_CQ_DB_REQ_NOT, priv->mdev->uar_map, 178 &priv->mdev->uar_lock); 179 180 return 0; 181 } 182 183 184