2 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
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
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9 * OpenIB.org BSD license below:
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12 * without modification, are permitted provided that the following
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19 * - Redistributions in binary form must reproduce the above
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22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #include <linux/init.h>
36 #include <linux/mlx4/cmd.h>
41 struct mlx4_srq_context {
42 __be32 state_logsize_srqn;
51 __be32 mtt_base_addr_l;
53 __be16 limit_watermark;
61 void mlx4_srq_event(struct mlx4_dev *dev, u32 srqn, int event_type)
63 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
66 spin_lock(&srq_table->lock);
68 srq = radix_tree_lookup(&srq_table->tree, srqn & (dev->caps.num_srqs - 1));
70 atomic_inc(&srq->refcount);
72 spin_unlock(&srq_table->lock);
75 mlx4_warn(dev, "Async event for bogus SRQ %08x\n", srqn);
79 srq->event(srq, event_type);
81 if (atomic_dec_and_test(&srq->refcount))
85 static int mlx4_SW2HW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
88 return mlx4_cmd(dev, mailbox->dma, srq_num, 0, MLX4_CMD_SW2HW_SRQ,
89 MLX4_CMD_TIME_CLASS_A);
92 static int mlx4_HW2SW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
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);
100 static int mlx4_ARM_SRQ(struct mlx4_dev *dev, int srq_num, int limit_watermark)
102 return mlx4_cmd(dev, limit_watermark, srq_num, 0, MLX4_CMD_ARM_SRQ,
103 MLX4_CMD_TIME_CLASS_B);
106 static int mlx4_QUERY_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
109 return mlx4_cmd_box(dev, 0, mailbox->dma, srq_num, 0, MLX4_CMD_QUERY_SRQ,
110 MLX4_CMD_TIME_CLASS_A);
113 int mlx4_srq_alloc(struct mlx4_dev *dev, u32 pdn, struct mlx4_mtt *mtt,
114 u64 db_rec, struct mlx4_srq *srq)
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;
122 srq->srqn = mlx4_bitmap_alloc(&srq_table->bitmap);
126 err = mlx4_table_get(dev, &srq_table->table, srq->srqn);
130 err = mlx4_table_get(dev, &srq_table->cmpt_table, srq->srqn);
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);
140 mailbox = mlx4_alloc_cmd_mailbox(dev);
141 if (IS_ERR(mailbox)) {
142 err = PTR_ERR(mailbox);
146 srq_context = mailbox->buf;
147 memset(srq_context, 0, sizeof *srq_context);
149 srq_context->state_logsize_srqn = cpu_to_be32((ilog2(srq->max) << 24) |
151 srq_context->logstride = srq->wqe_shift - 4;
152 srq_context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
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);
160 err = mlx4_SW2HW_SRQ(dev, mailbox, srq->srqn);
161 mlx4_free_cmd_mailbox(dev, mailbox);
165 atomic_set(&srq->refcount, 1);
166 init_completion(&srq->free);
171 spin_lock_irq(&srq_table->lock);
172 radix_tree_delete(&srq_table->tree, srq->srqn);
173 spin_unlock_irq(&srq_table->lock);
176 mlx4_table_put(dev, &srq_table->cmpt_table, srq->srqn);
179 mlx4_table_put(dev, &srq_table->table, srq->srqn);
182 mlx4_bitmap_free(&srq_table->bitmap, srq->srqn);
186 EXPORT_SYMBOL_GPL(mlx4_srq_alloc);
188 void mlx4_srq_free(struct mlx4_dev *dev, struct mlx4_srq *srq)
190 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
193 err = mlx4_HW2SW_SRQ(dev, NULL, srq->srqn);
195 mlx4_warn(dev, "HW2SW_SRQ failed (%d) for SRQN %06x\n", err, srq->srqn);
197 spin_lock_irq(&srq_table->lock);
198 radix_tree_delete(&srq_table->tree, srq->srqn);
199 spin_unlock_irq(&srq_table->lock);
201 if (atomic_dec_and_test(&srq->refcount))
202 complete(&srq->free);
203 wait_for_completion(&srq->free);
205 mlx4_table_put(dev, &srq_table->table, srq->srqn);
206 mlx4_bitmap_free(&srq_table->bitmap, srq->srqn);
208 EXPORT_SYMBOL_GPL(mlx4_srq_free);
210 int mlx4_srq_arm(struct mlx4_dev *dev, struct mlx4_srq *srq, int limit_watermark)
212 return mlx4_ARM_SRQ(dev, srq->srqn, limit_watermark);
214 EXPORT_SYMBOL_GPL(mlx4_srq_arm);
216 int mlx4_srq_query(struct mlx4_dev *dev, struct mlx4_srq *srq, int *limit_watermark)
218 struct mlx4_cmd_mailbox *mailbox;
219 struct mlx4_srq_context *srq_context;
222 mailbox = mlx4_alloc_cmd_mailbox(dev);
224 return PTR_ERR(mailbox);
226 srq_context = mailbox->buf;
228 err = mlx4_QUERY_SRQ(dev, mailbox, srq->srqn);
231 *limit_watermark = be16_to_cpu(srq_context->limit_watermark);
234 mlx4_free_cmd_mailbox(dev, mailbox);
237 EXPORT_SYMBOL_GPL(mlx4_srq_query);
239 int mlx4_init_srq_table(struct mlx4_dev *dev)
241 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
244 spin_lock_init(&srq_table->lock);
245 INIT_RADIX_TREE(&srq_table->tree, GFP_ATOMIC);
247 err = mlx4_bitmap_init(&srq_table->bitmap, dev->caps.num_srqs,
248 dev->caps.num_srqs - 1, dev->caps.reserved_srqs, 0);
255 void mlx4_cleanup_srq_table(struct mlx4_dev *dev)
257 mlx4_bitmap_cleanup(&mlx4_priv(dev)->srq_table.bitmap);