1 /* 2 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved. 3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34 35 #include <linux/mlx4/cmd.h> 36 #include <linux/mlx4/srq.h> 37 #include <linux/export.h> 38 #include <linux/gfp.h> 39 40 #include "mlx4.h" 41 #include "icm.h" 42 43 void mlx4_srq_event(struct mlx4_dev *dev, u32 srqn, int event_type) 44 { 45 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; 46 struct mlx4_srq *srq; 47 48 rcu_read_lock(); 49 srq = radix_tree_lookup(&srq_table->tree, srqn & (dev->caps.num_srqs - 1)); 50 rcu_read_unlock(); 51 if (srq) 52 refcount_inc(&srq->refcount); 53 else { 54 mlx4_warn(dev, "Async event for bogus SRQ %08x\n", srqn); 55 return; 56 } 57 58 srq->event(srq, event_type); 59 60 if (refcount_dec_and_test(&srq->refcount)) 61 complete(&srq->free); 62 } 63 64 static int mlx4_SW2HW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, 65 int srq_num) 66 { 67 return mlx4_cmd(dev, mailbox->dma, srq_num, 0, 68 MLX4_CMD_SW2HW_SRQ, MLX4_CMD_TIME_CLASS_A, 69 MLX4_CMD_WRAPPED); 70 } 71 72 static int mlx4_HW2SW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, 73 int srq_num) 74 { 75 return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, srq_num, 76 mailbox ? 0 : 1, MLX4_CMD_HW2SW_SRQ, 77 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); 78 } 79 80 static int mlx4_ARM_SRQ(struct mlx4_dev *dev, int srq_num, int limit_watermark) 81 { 82 return mlx4_cmd(dev, limit_watermark, srq_num, 0, MLX4_CMD_ARM_SRQ, 83 MLX4_CMD_TIME_CLASS_B, MLX4_CMD_WRAPPED); 84 } 85 86 static int mlx4_QUERY_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, 87 int srq_num) 88 { 89 return mlx4_cmd_box(dev, 0, mailbox->dma, srq_num, 0, MLX4_CMD_QUERY_SRQ, 90 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); 91 } 92 93 int __mlx4_srq_alloc_icm(struct mlx4_dev *dev, int *srqn) 94 { 95 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; 96 int err; 97 98 99 *srqn = mlx4_bitmap_alloc(&srq_table->bitmap); 100 if (*srqn == -1) 101 return -ENOMEM; 102 103 err = mlx4_table_get(dev, &srq_table->table, *srqn); 104 if (err) 105 goto err_out; 106 107 err = mlx4_table_get(dev, &srq_table->cmpt_table, *srqn); 108 if (err) 109 goto err_put; 110 return 0; 111 112 err_put: 113 mlx4_table_put(dev, &srq_table->table, *srqn); 114 115 err_out: 116 mlx4_bitmap_free(&srq_table->bitmap, *srqn, MLX4_NO_RR); 117 return err; 118 } 119 120 static int mlx4_srq_alloc_icm(struct mlx4_dev *dev, int *srqn) 121 { 122 u64 out_param; 123 int err; 124 125 if (mlx4_is_mfunc(dev)) { 126 err = mlx4_cmd_imm(dev, 0, &out_param, RES_SRQ, 127 RES_OP_RESERVE_AND_MAP, 128 MLX4_CMD_ALLOC_RES, 129 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED); 130 if (!err) 131 *srqn = get_param_l(&out_param); 132 133 return err; 134 } 135 return __mlx4_srq_alloc_icm(dev, srqn); 136 } 137 138 void __mlx4_srq_free_icm(struct mlx4_dev *dev, int srqn) 139 { 140 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; 141 142 mlx4_table_put(dev, &srq_table->cmpt_table, srqn); 143 mlx4_table_put(dev, &srq_table->table, srqn); 144 mlx4_bitmap_free(&srq_table->bitmap, srqn, MLX4_NO_RR); 145 } 146 147 static void mlx4_srq_free_icm(struct mlx4_dev *dev, int srqn) 148 { 149 u64 in_param = 0; 150 151 if (mlx4_is_mfunc(dev)) { 152 set_param_l(&in_param, srqn); 153 if (mlx4_cmd(dev, in_param, RES_SRQ, RES_OP_RESERVE_AND_MAP, 154 MLX4_CMD_FREE_RES, 155 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED)) 156 mlx4_warn(dev, "Failed freeing cq:%d\n", srqn); 157 return; 158 } 159 __mlx4_srq_free_icm(dev, srqn); 160 } 161 162 int mlx4_srq_alloc(struct mlx4_dev *dev, u32 pdn, u32 cqn, u16 xrcd, 163 struct mlx4_mtt *mtt, u64 db_rec, struct mlx4_srq *srq) 164 { 165 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; 166 struct mlx4_cmd_mailbox *mailbox; 167 struct mlx4_srq_context *srq_context; 168 u64 mtt_addr; 169 int err; 170 171 err = mlx4_srq_alloc_icm(dev, &srq->srqn); 172 if (err) 173 return err; 174 175 spin_lock_irq(&srq_table->lock); 176 err = radix_tree_insert(&srq_table->tree, srq->srqn, srq); 177 spin_unlock_irq(&srq_table->lock); 178 if (err) 179 goto err_icm; 180 181 mailbox = mlx4_alloc_cmd_mailbox(dev); 182 if (IS_ERR(mailbox)) { 183 err = PTR_ERR(mailbox); 184 goto err_radix; 185 } 186 187 srq_context = mailbox->buf; 188 srq_context->state_logsize_srqn = cpu_to_be32((ilog2(srq->max) << 24) | 189 srq->srqn); 190 srq_context->logstride = srq->wqe_shift - 4; 191 srq_context->xrcd = cpu_to_be16(xrcd); 192 srq_context->pg_offset_cqn = cpu_to_be32(cqn & 0xffffff); 193 srq_context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT; 194 195 mtt_addr = mlx4_mtt_addr(dev, mtt); 196 srq_context->mtt_base_addr_h = mtt_addr >> 32; 197 srq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff); 198 srq_context->pd = cpu_to_be32(pdn); 199 srq_context->db_rec_addr = cpu_to_be64(db_rec); 200 201 err = mlx4_SW2HW_SRQ(dev, mailbox, srq->srqn); 202 mlx4_free_cmd_mailbox(dev, mailbox); 203 if (err) 204 goto err_radix; 205 206 refcount_set(&srq->refcount, 1); 207 init_completion(&srq->free); 208 209 return 0; 210 211 err_radix: 212 spin_lock_irq(&srq_table->lock); 213 radix_tree_delete(&srq_table->tree, srq->srqn); 214 spin_unlock_irq(&srq_table->lock); 215 216 err_icm: 217 mlx4_srq_free_icm(dev, srq->srqn); 218 return err; 219 } 220 EXPORT_SYMBOL_GPL(mlx4_srq_alloc); 221 222 void mlx4_srq_free(struct mlx4_dev *dev, struct mlx4_srq *srq) 223 { 224 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; 225 int err; 226 227 err = mlx4_HW2SW_SRQ(dev, NULL, srq->srqn); 228 if (err) 229 mlx4_warn(dev, "HW2SW_SRQ failed (%d) for SRQN %06x\n", err, srq->srqn); 230 231 spin_lock_irq(&srq_table->lock); 232 radix_tree_delete(&srq_table->tree, srq->srqn); 233 spin_unlock_irq(&srq_table->lock); 234 235 if (refcount_dec_and_test(&srq->refcount)) 236 complete(&srq->free); 237 wait_for_completion(&srq->free); 238 239 mlx4_srq_free_icm(dev, srq->srqn); 240 } 241 EXPORT_SYMBOL_GPL(mlx4_srq_free); 242 243 int mlx4_srq_arm(struct mlx4_dev *dev, struct mlx4_srq *srq, int limit_watermark) 244 { 245 return mlx4_ARM_SRQ(dev, srq->srqn, limit_watermark); 246 } 247 EXPORT_SYMBOL_GPL(mlx4_srq_arm); 248 249 int mlx4_srq_query(struct mlx4_dev *dev, struct mlx4_srq *srq, int *limit_watermark) 250 { 251 struct mlx4_cmd_mailbox *mailbox; 252 struct mlx4_srq_context *srq_context; 253 int err; 254 255 mailbox = mlx4_alloc_cmd_mailbox(dev); 256 if (IS_ERR(mailbox)) 257 return PTR_ERR(mailbox); 258 259 srq_context = mailbox->buf; 260 261 err = mlx4_QUERY_SRQ(dev, mailbox, srq->srqn); 262 if (err) 263 goto err_out; 264 *limit_watermark = be16_to_cpu(srq_context->limit_watermark); 265 266 err_out: 267 mlx4_free_cmd_mailbox(dev, mailbox); 268 return err; 269 } 270 EXPORT_SYMBOL_GPL(mlx4_srq_query); 271 272 int mlx4_init_srq_table(struct mlx4_dev *dev) 273 { 274 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; 275 276 spin_lock_init(&srq_table->lock); 277 INIT_RADIX_TREE(&srq_table->tree, GFP_ATOMIC); 278 if (mlx4_is_slave(dev)) 279 return 0; 280 281 return mlx4_bitmap_init(&srq_table->bitmap, dev->caps.num_srqs, 282 dev->caps.num_srqs - 1, dev->caps.reserved_srqs, 0); 283 } 284 285 void mlx4_cleanup_srq_table(struct mlx4_dev *dev) 286 { 287 if (mlx4_is_slave(dev)) 288 return; 289 mlx4_bitmap_cleanup(&mlx4_priv(dev)->srq_table.bitmap); 290 } 291 292 struct mlx4_srq *mlx4_srq_lookup(struct mlx4_dev *dev, u32 srqn) 293 { 294 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; 295 struct mlx4_srq *srq; 296 297 rcu_read_lock(); 298 srq = radix_tree_lookup(&srq_table->tree, 299 srqn & (dev->caps.num_srqs - 1)); 300 rcu_read_unlock(); 301 302 return srq; 303 } 304 EXPORT_SYMBOL_GPL(mlx4_srq_lookup); 305