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
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34 #include <linux/init.h>
36 #include <linux/mlx4/cmd.h>
37 #include <linux/gfp.h>
42 void mlx4_srq_event(struct mlx4_dev *dev, u32 srqn, int event_type)
44 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
47 spin_lock(&srq_table->lock);
49 srq = radix_tree_lookup(&srq_table->tree, srqn & (dev->caps.num_srqs - 1));
51 atomic_inc(&srq->refcount);
53 spin_unlock(&srq_table->lock);
56 mlx4_warn(dev, "Async event for bogus SRQ %08x\n", srqn);
60 srq->event(srq, event_type);
62 if (atomic_dec_and_test(&srq->refcount))
66 static int mlx4_SW2HW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
69 return mlx4_cmd(dev, mailbox->dma, srq_num, 0,
70 MLX4_CMD_SW2HW_SRQ, MLX4_CMD_TIME_CLASS_A,
74 static int mlx4_HW2SW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
77 return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, srq_num,
78 mailbox ? 0 : 1, MLX4_CMD_HW2SW_SRQ,
79 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
82 static int mlx4_ARM_SRQ(struct mlx4_dev *dev, int srq_num, int limit_watermark)
84 return mlx4_cmd(dev, limit_watermark, srq_num, 0, MLX4_CMD_ARM_SRQ,
85 MLX4_CMD_TIME_CLASS_B, MLX4_CMD_WRAPPED);
88 static int mlx4_QUERY_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
91 return mlx4_cmd_box(dev, 0, mailbox->dma, srq_num, 0, MLX4_CMD_QUERY_SRQ,
92 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
95 int __mlx4_srq_alloc_icm(struct mlx4_dev *dev, int *srqn)
97 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
101 *srqn = mlx4_bitmap_alloc(&srq_table->bitmap);
105 err = mlx4_table_get(dev, &srq_table->table, *srqn);
109 err = mlx4_table_get(dev, &srq_table->cmpt_table, *srqn);
115 mlx4_table_put(dev, &srq_table->table, *srqn);
118 mlx4_bitmap_free(&srq_table->bitmap, *srqn);
122 static int mlx4_srq_alloc_icm(struct mlx4_dev *dev, int *srqn)
127 if (mlx4_is_mfunc(dev)) {
128 err = mlx4_cmd_imm(dev, 0, &out_param, RES_SRQ,
129 RES_OP_RESERVE_AND_MAP,
131 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
133 *srqn = get_param_l(&out_param);
137 return __mlx4_srq_alloc_icm(dev, srqn);
140 void __mlx4_srq_free_icm(struct mlx4_dev *dev, int srqn)
142 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
144 mlx4_table_put(dev, &srq_table->cmpt_table, srqn);
145 mlx4_table_put(dev, &srq_table->table, srqn);
146 mlx4_bitmap_free(&srq_table->bitmap, srqn);
149 static void mlx4_srq_free_icm(struct mlx4_dev *dev, int srqn)
153 if (mlx4_is_mfunc(dev)) {
154 set_param_l(&in_param, srqn);
155 if (mlx4_cmd(dev, in_param, RES_SRQ, RES_OP_RESERVE_AND_MAP,
157 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED))
158 mlx4_warn(dev, "Failed freeing cq:%d\n", srqn);
161 __mlx4_srq_free_icm(dev, srqn);
164 int mlx4_srq_alloc(struct mlx4_dev *dev, u32 pdn, u32 cqn, u16 xrcd,
165 struct mlx4_mtt *mtt, u64 db_rec, struct mlx4_srq *srq)
167 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
168 struct mlx4_cmd_mailbox *mailbox;
169 struct mlx4_srq_context *srq_context;
173 err = mlx4_srq_alloc_icm(dev, &srq->srqn);
177 spin_lock_irq(&srq_table->lock);
178 err = radix_tree_insert(&srq_table->tree, srq->srqn, srq);
179 spin_unlock_irq(&srq_table->lock);
183 mailbox = mlx4_alloc_cmd_mailbox(dev);
184 if (IS_ERR(mailbox)) {
185 err = PTR_ERR(mailbox);
189 srq_context = mailbox->buf;
190 memset(srq_context, 0, sizeof *srq_context);
192 srq_context->state_logsize_srqn = cpu_to_be32((ilog2(srq->max) << 24) |
194 srq_context->logstride = srq->wqe_shift - 4;
195 srq_context->xrcd = cpu_to_be16(xrcd);
196 srq_context->pg_offset_cqn = cpu_to_be32(cqn & 0xffffff);
197 srq_context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
199 mtt_addr = mlx4_mtt_addr(dev, mtt);
200 srq_context->mtt_base_addr_h = mtt_addr >> 32;
201 srq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
202 srq_context->pd = cpu_to_be32(pdn);
203 srq_context->db_rec_addr = cpu_to_be64(db_rec);
205 err = mlx4_SW2HW_SRQ(dev, mailbox, srq->srqn);
206 mlx4_free_cmd_mailbox(dev, mailbox);
210 atomic_set(&srq->refcount, 1);
211 init_completion(&srq->free);
216 spin_lock_irq(&srq_table->lock);
217 radix_tree_delete(&srq_table->tree, srq->srqn);
218 spin_unlock_irq(&srq_table->lock);
221 mlx4_srq_free_icm(dev, srq->srqn);
224 EXPORT_SYMBOL_GPL(mlx4_srq_alloc);
226 void mlx4_srq_free(struct mlx4_dev *dev, struct mlx4_srq *srq)
228 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
231 err = mlx4_HW2SW_SRQ(dev, NULL, srq->srqn);
233 mlx4_warn(dev, "HW2SW_SRQ failed (%d) for SRQN %06x\n", err, srq->srqn);
235 spin_lock_irq(&srq_table->lock);
236 radix_tree_delete(&srq_table->tree, srq->srqn);
237 spin_unlock_irq(&srq_table->lock);
239 if (atomic_dec_and_test(&srq->refcount))
240 complete(&srq->free);
241 wait_for_completion(&srq->free);
243 mlx4_srq_free_icm(dev, srq->srqn);
245 EXPORT_SYMBOL_GPL(mlx4_srq_free);
247 int mlx4_srq_arm(struct mlx4_dev *dev, struct mlx4_srq *srq, int limit_watermark)
249 return mlx4_ARM_SRQ(dev, srq->srqn, limit_watermark);
251 EXPORT_SYMBOL_GPL(mlx4_srq_arm);
253 int mlx4_srq_query(struct mlx4_dev *dev, struct mlx4_srq *srq, int *limit_watermark)
255 struct mlx4_cmd_mailbox *mailbox;
256 struct mlx4_srq_context *srq_context;
259 mailbox = mlx4_alloc_cmd_mailbox(dev);
261 return PTR_ERR(mailbox);
263 srq_context = mailbox->buf;
265 err = mlx4_QUERY_SRQ(dev, mailbox, srq->srqn);
268 *limit_watermark = be16_to_cpu(srq_context->limit_watermark);
271 mlx4_free_cmd_mailbox(dev, mailbox);
274 EXPORT_SYMBOL_GPL(mlx4_srq_query);
276 int mlx4_init_srq_table(struct mlx4_dev *dev)
278 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
281 spin_lock_init(&srq_table->lock);
282 INIT_RADIX_TREE(&srq_table->tree, GFP_ATOMIC);
283 if (mlx4_is_slave(dev))
286 err = mlx4_bitmap_init(&srq_table->bitmap, dev->caps.num_srqs,
287 dev->caps.num_srqs - 1, dev->caps.reserved_srqs, 0);
294 void mlx4_cleanup_srq_table(struct mlx4_dev *dev)
296 if (mlx4_is_slave(dev))
298 mlx4_bitmap_cleanup(&mlx4_priv(dev)->srq_table.bitmap);