| 1 | /* |
| 2 | * Copyright (c) 2013-2015, 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 | #include <linux/kernel.h> |
| 34 | #include <linux/module.h> |
| 35 | #include <linux/hardirq.h> |
| 36 | #include <linux/mlx5/driver.h> |
| 37 | #include <linux/mlx5/cmd.h> |
| 38 | #include <rdma/ib_verbs.h> |
| 39 | #include <linux/mlx5/cq.h> |
| 40 | #include "mlx5_core.h" |
| 41 | |
| 42 | void mlx5_cq_completion(struct mlx5_core_dev *dev, u32 cqn) |
| 43 | { |
| 44 | struct mlx5_core_cq *cq; |
| 45 | struct mlx5_cq_table *table = &dev->priv.cq_table; |
| 46 | |
| 47 | spin_lock(&table->lock); |
| 48 | cq = radix_tree_lookup(&table->tree, cqn); |
| 49 | if (likely(cq)) |
| 50 | atomic_inc(&cq->refcount); |
| 51 | spin_unlock(&table->lock); |
| 52 | |
| 53 | if (!cq) { |
| 54 | mlx5_core_warn(dev, "Completion event for bogus CQ 0x%x\n", cqn); |
| 55 | return; |
| 56 | } |
| 57 | |
| 58 | ++cq->arm_sn; |
| 59 | |
| 60 | cq->comp(cq); |
| 61 | |
| 62 | if (atomic_dec_and_test(&cq->refcount)) |
| 63 | complete(&cq->free); |
| 64 | } |
| 65 | |
| 66 | void mlx5_cq_event(struct mlx5_core_dev *dev, u32 cqn, int event_type) |
| 67 | { |
| 68 | struct mlx5_cq_table *table = &dev->priv.cq_table; |
| 69 | struct mlx5_core_cq *cq; |
| 70 | |
| 71 | spin_lock(&table->lock); |
| 72 | |
| 73 | cq = radix_tree_lookup(&table->tree, cqn); |
| 74 | if (cq) |
| 75 | atomic_inc(&cq->refcount); |
| 76 | |
| 77 | spin_unlock(&table->lock); |
| 78 | |
| 79 | if (!cq) { |
| 80 | mlx5_core_warn(dev, "Async event for bogus CQ 0x%x\n", cqn); |
| 81 | return; |
| 82 | } |
| 83 | |
| 84 | cq->event(cq, event_type); |
| 85 | |
| 86 | if (atomic_dec_and_test(&cq->refcount)) |
| 87 | complete(&cq->free); |
| 88 | } |
| 89 | |
| 90 | |
| 91 | int mlx5_core_create_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq, |
| 92 | struct mlx5_create_cq_mbox_in *in, int inlen) |
| 93 | { |
| 94 | int err; |
| 95 | struct mlx5_cq_table *table = &dev->priv.cq_table; |
| 96 | struct mlx5_create_cq_mbox_out out; |
| 97 | struct mlx5_destroy_cq_mbox_in din; |
| 98 | struct mlx5_destroy_cq_mbox_out dout; |
| 99 | |
| 100 | in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_CREATE_CQ); |
| 101 | memset(&out, 0, sizeof(out)); |
| 102 | err = mlx5_cmd_exec(dev, in, inlen, &out, sizeof(out)); |
| 103 | if (err) |
| 104 | return err; |
| 105 | |
| 106 | if (out.hdr.status) |
| 107 | return mlx5_cmd_status_to_err(&out.hdr); |
| 108 | |
| 109 | cq->cqn = be32_to_cpu(out.cqn) & 0xffffff; |
| 110 | cq->cons_index = 0; |
| 111 | cq->arm_sn = 0; |
| 112 | atomic_set(&cq->refcount, 1); |
| 113 | init_completion(&cq->free); |
| 114 | |
| 115 | spin_lock_irq(&table->lock); |
| 116 | err = radix_tree_insert(&table->tree, cq->cqn, cq); |
| 117 | spin_unlock_irq(&table->lock); |
| 118 | if (err) |
| 119 | goto err_cmd; |
| 120 | |
| 121 | cq->pid = current->pid; |
| 122 | err = mlx5_debug_cq_add(dev, cq); |
| 123 | if (err) |
| 124 | mlx5_core_dbg(dev, "failed adding CP 0x%x to debug file system\n", |
| 125 | cq->cqn); |
| 126 | |
| 127 | return 0; |
| 128 | |
| 129 | err_cmd: |
| 130 | memset(&din, 0, sizeof(din)); |
| 131 | memset(&dout, 0, sizeof(dout)); |
| 132 | din.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_CQ); |
| 133 | mlx5_cmd_exec(dev, &din, sizeof(din), &dout, sizeof(dout)); |
| 134 | return err; |
| 135 | } |
| 136 | EXPORT_SYMBOL(mlx5_core_create_cq); |
| 137 | |
| 138 | int mlx5_core_destroy_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq) |
| 139 | { |
| 140 | struct mlx5_cq_table *table = &dev->priv.cq_table; |
| 141 | struct mlx5_destroy_cq_mbox_in in; |
| 142 | struct mlx5_destroy_cq_mbox_out out; |
| 143 | struct mlx5_core_cq *tmp; |
| 144 | int err; |
| 145 | |
| 146 | spin_lock_irq(&table->lock); |
| 147 | tmp = radix_tree_delete(&table->tree, cq->cqn); |
| 148 | spin_unlock_irq(&table->lock); |
| 149 | if (!tmp) { |
| 150 | mlx5_core_warn(dev, "cq 0x%x not found in tree\n", cq->cqn); |
| 151 | return -EINVAL; |
| 152 | } |
| 153 | if (tmp != cq) { |
| 154 | mlx5_core_warn(dev, "corruption on srqn 0x%x\n", cq->cqn); |
| 155 | return -EINVAL; |
| 156 | } |
| 157 | |
| 158 | memset(&in, 0, sizeof(in)); |
| 159 | memset(&out, 0, sizeof(out)); |
| 160 | in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_DESTROY_CQ); |
| 161 | in.cqn = cpu_to_be32(cq->cqn); |
| 162 | err = mlx5_cmd_exec(dev, &in, sizeof(in), &out, sizeof(out)); |
| 163 | if (err) |
| 164 | return err; |
| 165 | |
| 166 | if (out.hdr.status) |
| 167 | return mlx5_cmd_status_to_err(&out.hdr); |
| 168 | |
| 169 | synchronize_irq(cq->irqn); |
| 170 | |
| 171 | mlx5_debug_cq_remove(dev, cq); |
| 172 | if (atomic_dec_and_test(&cq->refcount)) |
| 173 | complete(&cq->free); |
| 174 | wait_for_completion(&cq->free); |
| 175 | |
| 176 | return 0; |
| 177 | } |
| 178 | EXPORT_SYMBOL(mlx5_core_destroy_cq); |
| 179 | |
| 180 | int mlx5_core_query_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq, |
| 181 | struct mlx5_query_cq_mbox_out *out) |
| 182 | { |
| 183 | struct mlx5_query_cq_mbox_in in; |
| 184 | int err; |
| 185 | |
| 186 | memset(&in, 0, sizeof(in)); |
| 187 | memset(out, 0, sizeof(*out)); |
| 188 | |
| 189 | in.hdr.opcode = cpu_to_be16(MLX5_CMD_OP_QUERY_CQ); |
| 190 | in.cqn = cpu_to_be32(cq->cqn); |
| 191 | err = mlx5_cmd_exec(dev, &in, sizeof(in), out, sizeof(*out)); |
| 192 | if (err) |
| 193 | return err; |
| 194 | |
| 195 | if (out->hdr.status) |
| 196 | return mlx5_cmd_status_to_err(&out->hdr); |
| 197 | |
| 198 | return err; |
| 199 | } |
| 200 | EXPORT_SYMBOL(mlx5_core_query_cq); |
| 201 | |
| 202 | |
| 203 | int mlx5_core_modify_cq(struct mlx5_core_dev *dev, struct mlx5_core_cq *cq, |
| 204 | struct mlx5_modify_cq_mbox_in *in, int in_sz) |
| 205 | { |
| 206 | struct mlx5_modify_cq_mbox_out out; |
| 207 | int err; |
| 208 | |
| 209 | memset(&out, 0, sizeof(out)); |
| 210 | in->hdr.opcode = cpu_to_be16(MLX5_CMD_OP_MODIFY_CQ); |
| 211 | err = mlx5_cmd_exec(dev, in, in_sz, &out, sizeof(out)); |
| 212 | if (err) |
| 213 | return err; |
| 214 | |
| 215 | if (out.hdr.status) |
| 216 | return mlx5_cmd_status_to_err(&out.hdr); |
| 217 | |
| 218 | return 0; |
| 219 | } |
| 220 | EXPORT_SYMBOL(mlx5_core_modify_cq); |
| 221 | |
| 222 | int mlx5_core_modify_cq_moderation(struct mlx5_core_dev *dev, |
| 223 | struct mlx5_core_cq *cq, |
| 224 | u16 cq_period, |
| 225 | u16 cq_max_count) |
| 226 | { |
| 227 | struct mlx5_modify_cq_mbox_in in; |
| 228 | |
| 229 | memset(&in, 0, sizeof(in)); |
| 230 | |
| 231 | in.cqn = cpu_to_be32(cq->cqn); |
| 232 | in.ctx.cq_period = cpu_to_be16(cq_period); |
| 233 | in.ctx.cq_max_count = cpu_to_be16(cq_max_count); |
| 234 | in.field_select = cpu_to_be32(MLX5_CQ_MODIFY_PERIOD | |
| 235 | MLX5_CQ_MODIFY_COUNT); |
| 236 | |
| 237 | return mlx5_core_modify_cq(dev, cq, &in, sizeof(in)); |
| 238 | } |
| 239 | |
| 240 | int mlx5_init_cq_table(struct mlx5_core_dev *dev) |
| 241 | { |
| 242 | struct mlx5_cq_table *table = &dev->priv.cq_table; |
| 243 | int err; |
| 244 | |
| 245 | spin_lock_init(&table->lock); |
| 246 | INIT_RADIX_TREE(&table->tree, GFP_ATOMIC); |
| 247 | err = mlx5_cq_debugfs_init(dev); |
| 248 | |
| 249 | return err; |
| 250 | } |
| 251 | |
| 252 | void mlx5_cleanup_cq_table(struct mlx5_core_dev *dev) |
| 253 | { |
| 254 | mlx5_cq_debugfs_cleanup(dev); |
| 255 | } |