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
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30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #include <linux/mlx4/cmd.h>
35 #include <linux/gfp.h>
40 struct mlx4_srq_context {
41 __be32 state_logsize_srqn;
50 __be32 mtt_base_addr_l;
52 __be16 limit_watermark;
60 void mlx4_srq_event(struct mlx4_dev *dev, u32 srqn, int event_type)
62 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
65 spin_lock(&srq_table->lock);
67 srq = radix_tree_lookup(&srq_table->tree, srqn & (dev->caps.num_srqs - 1));
69 atomic_inc(&srq->refcount);
71 spin_unlock(&srq_table->lock);
74 mlx4_warn(dev, "Async event for bogus SRQ %08x\n", srqn);
78 srq->event(srq, event_type);
80 if (atomic_dec_and_test(&srq->refcount))
84 static int mlx4_SW2HW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
87 return mlx4_cmd(dev, mailbox->dma, srq_num, 0, MLX4_CMD_SW2HW_SRQ,
88 MLX4_CMD_TIME_CLASS_A);
91 static int mlx4_HW2SW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
94 return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, srq_num,
95 mailbox ? 0 : 1, MLX4_CMD_HW2SW_SRQ,
96 MLX4_CMD_TIME_CLASS_A);
99 static int mlx4_ARM_SRQ(struct mlx4_dev *dev, int srq_num, int limit_watermark)
101 return mlx4_cmd(dev, limit_watermark, srq_num, 0, MLX4_CMD_ARM_SRQ,
102 MLX4_CMD_TIME_CLASS_B);
105 static int mlx4_QUERY_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
108 return mlx4_cmd_box(dev, 0, mailbox->dma, srq_num, 0, MLX4_CMD_QUERY_SRQ,
109 MLX4_CMD_TIME_CLASS_A);
112 int mlx4_srq_alloc(struct mlx4_dev *dev, u32 pdn, u32 cqn, u16 xrcd,
113 struct mlx4_mtt *mtt, u64 db_rec, struct mlx4_srq *srq)
115 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
116 struct mlx4_cmd_mailbox *mailbox;
117 struct mlx4_srq_context *srq_context;
121 srq->srqn = mlx4_bitmap_alloc(&srq_table->bitmap);
125 err = mlx4_table_get(dev, &srq_table->table, srq->srqn);
129 err = mlx4_table_get(dev, &srq_table->cmpt_table, srq->srqn);
133 spin_lock_irq(&srq_table->lock);
134 err = radix_tree_insert(&srq_table->tree, srq->srqn, srq);
135 spin_unlock_irq(&srq_table->lock);
139 mailbox = mlx4_alloc_cmd_mailbox(dev);
140 if (IS_ERR(mailbox)) {
141 err = PTR_ERR(mailbox);
145 srq_context = mailbox->buf;
146 memset(srq_context, 0, sizeof *srq_context);
148 srq_context->state_logsize_srqn = cpu_to_be32((ilog2(srq->max) << 24) |
150 srq_context->logstride = srq->wqe_shift - 4;
151 srq_context->xrcd = cpu_to_be16(xrcd);
152 srq_context->pg_offset_cqn = cpu_to_be32(cqn & 0xffffff);
153 srq_context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
155 mtt_addr = mlx4_mtt_addr(dev, mtt);
156 srq_context->mtt_base_addr_h = mtt_addr >> 32;
157 srq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
158 srq_context->pd = cpu_to_be32(pdn);
159 srq_context->db_rec_addr = cpu_to_be64(db_rec);
161 err = mlx4_SW2HW_SRQ(dev, mailbox, srq->srqn);
162 mlx4_free_cmd_mailbox(dev, mailbox);
166 atomic_set(&srq->refcount, 1);
167 init_completion(&srq->free);
172 spin_lock_irq(&srq_table->lock);
173 radix_tree_delete(&srq_table->tree, srq->srqn);
174 spin_unlock_irq(&srq_table->lock);
177 mlx4_table_put(dev, &srq_table->cmpt_table, srq->srqn);
180 mlx4_table_put(dev, &srq_table->table, srq->srqn);
183 mlx4_bitmap_free(&srq_table->bitmap, srq->srqn);
187 EXPORT_SYMBOL_GPL(mlx4_srq_alloc);
189 void mlx4_srq_free(struct mlx4_dev *dev, struct mlx4_srq *srq)
191 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
194 err = mlx4_HW2SW_SRQ(dev, NULL, srq->srqn);
196 mlx4_warn(dev, "HW2SW_SRQ failed (%d) for SRQN %06x\n", err, srq->srqn);
198 spin_lock_irq(&srq_table->lock);
199 radix_tree_delete(&srq_table->tree, srq->srqn);
200 spin_unlock_irq(&srq_table->lock);
202 if (atomic_dec_and_test(&srq->refcount))
203 complete(&srq->free);
204 wait_for_completion(&srq->free);
206 mlx4_table_put(dev, &srq_table->table, srq->srqn);
207 mlx4_bitmap_free(&srq_table->bitmap, srq->srqn);
209 EXPORT_SYMBOL_GPL(mlx4_srq_free);
211 int mlx4_srq_arm(struct mlx4_dev *dev, struct mlx4_srq *srq, int limit_watermark)
213 return mlx4_ARM_SRQ(dev, srq->srqn, limit_watermark);
215 EXPORT_SYMBOL_GPL(mlx4_srq_arm);
217 int mlx4_srq_query(struct mlx4_dev *dev, struct mlx4_srq *srq, int *limit_watermark)
219 struct mlx4_cmd_mailbox *mailbox;
220 struct mlx4_srq_context *srq_context;
223 mailbox = mlx4_alloc_cmd_mailbox(dev);
225 return PTR_ERR(mailbox);
227 srq_context = mailbox->buf;
229 err = mlx4_QUERY_SRQ(dev, mailbox, srq->srqn);
232 *limit_watermark = be16_to_cpu(srq_context->limit_watermark);
235 mlx4_free_cmd_mailbox(dev, mailbox);
238 EXPORT_SYMBOL_GPL(mlx4_srq_query);
240 int mlx4_init_srq_table(struct mlx4_dev *dev)
242 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
245 spin_lock_init(&srq_table->lock);
246 INIT_RADIX_TREE(&srq_table->tree, GFP_ATOMIC);
248 err = mlx4_bitmap_init(&srq_table->bitmap, dev->caps.num_srqs,
249 dev->caps.num_srqs - 1, dev->caps.reserved_srqs, 0);
256 void mlx4_cleanup_srq_table(struct mlx4_dev *dev)
258 mlx4_bitmap_cleanup(&mlx4_priv(dev)->srq_table.bitmap);