srq.c revision ee40fa0656a730491765545ff7550f3c1ceb0fbc
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#include <linux/mlx4/cmd.h> 35#include <linux/export.h> 36#include <linux/gfp.h> 37 38#include "mlx4.h" 39#include "icm.h" 40 41struct mlx4_srq_context { 42 __be32 state_logsize_srqn; 43 u8 logstride; 44 u8 reserved1[3]; 45 u8 pg_offset; 46 u8 reserved2[3]; 47 u32 reserved3; 48 u8 log_page_size; 49 u8 reserved4[2]; 50 u8 mtt_base_addr_h; 51 __be32 mtt_base_addr_l; 52 __be32 pd; 53 __be16 limit_watermark; 54 __be16 wqe_cnt; 55 u16 reserved5; 56 __be16 wqe_counter; 57 u32 reserved6; 58 __be64 db_rec_addr; 59}; 60 61void mlx4_srq_event(struct mlx4_dev *dev, u32 srqn, int event_type) 62{ 63 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; 64 struct mlx4_srq *srq; 65 66 spin_lock(&srq_table->lock); 67 68 srq = radix_tree_lookup(&srq_table->tree, srqn & (dev->caps.num_srqs - 1)); 69 if (srq) 70 atomic_inc(&srq->refcount); 71 72 spin_unlock(&srq_table->lock); 73 74 if (!srq) { 75 mlx4_warn(dev, "Async event for bogus SRQ %08x\n", srqn); 76 return; 77 } 78 79 srq->event(srq, event_type); 80 81 if (atomic_dec_and_test(&srq->refcount)) 82 complete(&srq->free); 83} 84 85static int mlx4_SW2HW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, 86 int srq_num) 87{ 88 return mlx4_cmd(dev, mailbox->dma, srq_num, 0, MLX4_CMD_SW2HW_SRQ, 89 MLX4_CMD_TIME_CLASS_A); 90} 91 92static int mlx4_HW2SW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, 93 int srq_num) 94{ 95 return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, srq_num, 96 mailbox ? 0 : 1, MLX4_CMD_HW2SW_SRQ, 97 MLX4_CMD_TIME_CLASS_A); 98} 99 100static int mlx4_ARM_SRQ(struct mlx4_dev *dev, int srq_num, int limit_watermark) 101{ 102 return mlx4_cmd(dev, limit_watermark, srq_num, 0, MLX4_CMD_ARM_SRQ, 103 MLX4_CMD_TIME_CLASS_B); 104} 105 106static int mlx4_QUERY_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox, 107 int srq_num) 108{ 109 return mlx4_cmd_box(dev, 0, mailbox->dma, srq_num, 0, MLX4_CMD_QUERY_SRQ, 110 MLX4_CMD_TIME_CLASS_A); 111} 112 113int mlx4_srq_alloc(struct mlx4_dev *dev, u32 pdn, struct mlx4_mtt *mtt, 114 u64 db_rec, struct mlx4_srq *srq) 115{ 116 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; 117 struct mlx4_cmd_mailbox *mailbox; 118 struct mlx4_srq_context *srq_context; 119 u64 mtt_addr; 120 int err; 121 122 srq->srqn = mlx4_bitmap_alloc(&srq_table->bitmap); 123 if (srq->srqn == -1) 124 return -ENOMEM; 125 126 err = mlx4_table_get(dev, &srq_table->table, srq->srqn); 127 if (err) 128 goto err_out; 129 130 err = mlx4_table_get(dev, &srq_table->cmpt_table, srq->srqn); 131 if (err) 132 goto err_put; 133 134 spin_lock_irq(&srq_table->lock); 135 err = radix_tree_insert(&srq_table->tree, srq->srqn, srq); 136 spin_unlock_irq(&srq_table->lock); 137 if (err) 138 goto err_cmpt_put; 139 140 mailbox = mlx4_alloc_cmd_mailbox(dev); 141 if (IS_ERR(mailbox)) { 142 err = PTR_ERR(mailbox); 143 goto err_radix; 144 } 145 146 srq_context = mailbox->buf; 147 memset(srq_context, 0, sizeof *srq_context); 148 149 srq_context->state_logsize_srqn = cpu_to_be32((ilog2(srq->max) << 24) | 150 srq->srqn); 151 srq_context->logstride = srq->wqe_shift - 4; 152 srq_context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT; 153 154 mtt_addr = mlx4_mtt_addr(dev, mtt); 155 srq_context->mtt_base_addr_h = mtt_addr >> 32; 156 srq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff); 157 srq_context->pd = cpu_to_be32(pdn); 158 srq_context->db_rec_addr = cpu_to_be64(db_rec); 159 160 err = mlx4_SW2HW_SRQ(dev, mailbox, srq->srqn); 161 mlx4_free_cmd_mailbox(dev, mailbox); 162 if (err) 163 goto err_radix; 164 165 atomic_set(&srq->refcount, 1); 166 init_completion(&srq->free); 167 168 return 0; 169 170err_radix: 171 spin_lock_irq(&srq_table->lock); 172 radix_tree_delete(&srq_table->tree, srq->srqn); 173 spin_unlock_irq(&srq_table->lock); 174 175err_cmpt_put: 176 mlx4_table_put(dev, &srq_table->cmpt_table, srq->srqn); 177 178err_put: 179 mlx4_table_put(dev, &srq_table->table, srq->srqn); 180 181err_out: 182 mlx4_bitmap_free(&srq_table->bitmap, srq->srqn); 183 184 return err; 185} 186EXPORT_SYMBOL_GPL(mlx4_srq_alloc); 187 188void mlx4_srq_free(struct mlx4_dev *dev, struct mlx4_srq *srq) 189{ 190 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; 191 int err; 192 193 err = mlx4_HW2SW_SRQ(dev, NULL, srq->srqn); 194 if (err) 195 mlx4_warn(dev, "HW2SW_SRQ failed (%d) for SRQN %06x\n", err, srq->srqn); 196 197 spin_lock_irq(&srq_table->lock); 198 radix_tree_delete(&srq_table->tree, srq->srqn); 199 spin_unlock_irq(&srq_table->lock); 200 201 if (atomic_dec_and_test(&srq->refcount)) 202 complete(&srq->free); 203 wait_for_completion(&srq->free); 204 205 mlx4_table_put(dev, &srq_table->table, srq->srqn); 206 mlx4_bitmap_free(&srq_table->bitmap, srq->srqn); 207} 208EXPORT_SYMBOL_GPL(mlx4_srq_free); 209 210int mlx4_srq_arm(struct mlx4_dev *dev, struct mlx4_srq *srq, int limit_watermark) 211{ 212 return mlx4_ARM_SRQ(dev, srq->srqn, limit_watermark); 213} 214EXPORT_SYMBOL_GPL(mlx4_srq_arm); 215 216int mlx4_srq_query(struct mlx4_dev *dev, struct mlx4_srq *srq, int *limit_watermark) 217{ 218 struct mlx4_cmd_mailbox *mailbox; 219 struct mlx4_srq_context *srq_context; 220 int err; 221 222 mailbox = mlx4_alloc_cmd_mailbox(dev); 223 if (IS_ERR(mailbox)) 224 return PTR_ERR(mailbox); 225 226 srq_context = mailbox->buf; 227 228 err = mlx4_QUERY_SRQ(dev, mailbox, srq->srqn); 229 if (err) 230 goto err_out; 231 *limit_watermark = be16_to_cpu(srq_context->limit_watermark); 232 233err_out: 234 mlx4_free_cmd_mailbox(dev, mailbox); 235 return err; 236} 237EXPORT_SYMBOL_GPL(mlx4_srq_query); 238 239int mlx4_init_srq_table(struct mlx4_dev *dev) 240{ 241 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table; 242 int err; 243 244 spin_lock_init(&srq_table->lock); 245 INIT_RADIX_TREE(&srq_table->tree, GFP_ATOMIC); 246 247 err = mlx4_bitmap_init(&srq_table->bitmap, dev->caps.num_srqs, 248 dev->caps.num_srqs - 1, dev->caps.reserved_srqs, 0); 249 if (err) 250 return err; 251 252 return 0; 253} 254 255void mlx4_cleanup_srq_table(struct mlx4_dev *dev) 256{ 257 mlx4_bitmap_cleanup(&mlx4_priv(dev)->srq_table.bitmap); 258} 259