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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12 * without modification, are permitted provided that the following
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34 #include <linux/init.h>
36 #include <linux/mlx4/cmd.h>
37 #include <linux/export.h>
38 #include <linux/gfp.h>
43 void mlx4_srq_event(struct mlx4_dev *dev, u32 srqn, int event_type)
45 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
48 spin_lock(&srq_table->lock);
50 srq = radix_tree_lookup(&srq_table->tree, srqn & (dev->caps.num_srqs - 1));
52 atomic_inc(&srq->refcount);
54 spin_unlock(&srq_table->lock);
57 mlx4_warn(dev, "Async event for bogus SRQ %08x\n", srqn);
61 srq->event(srq, event_type);
63 if (atomic_dec_and_test(&srq->refcount))
67 static int mlx4_SW2HW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
70 return mlx4_cmd(dev, mailbox->dma, srq_num, 0,
71 MLX4_CMD_SW2HW_SRQ, MLX4_CMD_TIME_CLASS_A,
75 static int mlx4_HW2SW_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
78 return mlx4_cmd_box(dev, 0, mailbox ? mailbox->dma : 0, srq_num,
79 mailbox ? 0 : 1, MLX4_CMD_HW2SW_SRQ,
80 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
83 static int mlx4_ARM_SRQ(struct mlx4_dev *dev, int srq_num, int limit_watermark)
85 return mlx4_cmd(dev, limit_watermark, srq_num, 0, MLX4_CMD_ARM_SRQ,
86 MLX4_CMD_TIME_CLASS_B, MLX4_CMD_WRAPPED);
89 static int mlx4_QUERY_SRQ(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
92 return mlx4_cmd_box(dev, 0, mailbox->dma, srq_num, 0, MLX4_CMD_QUERY_SRQ,
93 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
96 int __mlx4_srq_alloc_icm(struct mlx4_dev *dev, int *srqn)
98 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
102 *srqn = mlx4_bitmap_alloc(&srq_table->bitmap);
106 err = mlx4_table_get(dev, &srq_table->table, *srqn);
110 err = mlx4_table_get(dev, &srq_table->cmpt_table, *srqn);
116 mlx4_table_put(dev, &srq_table->table, *srqn);
119 mlx4_bitmap_free(&srq_table->bitmap, *srqn);
123 static int mlx4_srq_alloc_icm(struct mlx4_dev *dev, int *srqn)
128 if (mlx4_is_mfunc(dev)) {
129 err = mlx4_cmd_imm(dev, 0, &out_param, RES_SRQ,
130 RES_OP_RESERVE_AND_MAP,
132 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED);
134 *srqn = get_param_l(&out_param);
138 return __mlx4_srq_alloc_icm(dev, srqn);
141 void __mlx4_srq_free_icm(struct mlx4_dev *dev, int srqn)
143 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
145 mlx4_table_put(dev, &srq_table->cmpt_table, srqn);
146 mlx4_table_put(dev, &srq_table->table, srqn);
147 mlx4_bitmap_free(&srq_table->bitmap, srqn);
150 static void mlx4_srq_free_icm(struct mlx4_dev *dev, int srqn)
154 if (mlx4_is_mfunc(dev)) {
155 set_param_l(&in_param, srqn);
156 if (mlx4_cmd(dev, in_param, RES_SRQ, RES_OP_RESERVE_AND_MAP,
158 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_WRAPPED))
159 mlx4_warn(dev, "Failed freeing cq:%d\n", srqn);
162 __mlx4_srq_free_icm(dev, srqn);
165 int mlx4_srq_alloc(struct mlx4_dev *dev, u32 pdn, u32 cqn, u16 xrcd,
166 struct mlx4_mtt *mtt, u64 db_rec, struct mlx4_srq *srq)
168 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
169 struct mlx4_cmd_mailbox *mailbox;
170 struct mlx4_srq_context *srq_context;
174 err = mlx4_srq_alloc_icm(dev, &srq->srqn);
178 spin_lock_irq(&srq_table->lock);
179 err = radix_tree_insert(&srq_table->tree, srq->srqn, srq);
180 spin_unlock_irq(&srq_table->lock);
184 mailbox = mlx4_alloc_cmd_mailbox(dev);
185 if (IS_ERR(mailbox)) {
186 err = PTR_ERR(mailbox);
190 srq_context = mailbox->buf;
191 memset(srq_context, 0, sizeof *srq_context);
193 srq_context->state_logsize_srqn = cpu_to_be32((ilog2(srq->max) << 24) |
195 srq_context->logstride = srq->wqe_shift - 4;
196 srq_context->xrcd = cpu_to_be16(xrcd);
197 srq_context->pg_offset_cqn = cpu_to_be32(cqn & 0xffffff);
198 srq_context->log_page_size = mtt->page_shift - MLX4_ICM_PAGE_SHIFT;
200 mtt_addr = mlx4_mtt_addr(dev, mtt);
201 srq_context->mtt_base_addr_h = mtt_addr >> 32;
202 srq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
203 srq_context->pd = cpu_to_be32(pdn);
204 srq_context->db_rec_addr = cpu_to_be64(db_rec);
206 err = mlx4_SW2HW_SRQ(dev, mailbox, srq->srqn);
207 mlx4_free_cmd_mailbox(dev, mailbox);
211 atomic_set(&srq->refcount, 1);
212 init_completion(&srq->free);
217 spin_lock_irq(&srq_table->lock);
218 radix_tree_delete(&srq_table->tree, srq->srqn);
219 spin_unlock_irq(&srq_table->lock);
222 mlx4_srq_free_icm(dev, srq->srqn);
225 EXPORT_SYMBOL_GPL(mlx4_srq_alloc);
227 void mlx4_srq_free(struct mlx4_dev *dev, struct mlx4_srq *srq)
229 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
232 err = mlx4_HW2SW_SRQ(dev, NULL, srq->srqn);
234 mlx4_warn(dev, "HW2SW_SRQ failed (%d) for SRQN %06x\n", err, srq->srqn);
236 spin_lock_irq(&srq_table->lock);
237 radix_tree_delete(&srq_table->tree, srq->srqn);
238 spin_unlock_irq(&srq_table->lock);
240 if (atomic_dec_and_test(&srq->refcount))
241 complete(&srq->free);
242 wait_for_completion(&srq->free);
244 mlx4_srq_free_icm(dev, srq->srqn);
246 EXPORT_SYMBOL_GPL(mlx4_srq_free);
248 int mlx4_srq_arm(struct mlx4_dev *dev, struct mlx4_srq *srq, int limit_watermark)
250 return mlx4_ARM_SRQ(dev, srq->srqn, limit_watermark);
252 EXPORT_SYMBOL_GPL(mlx4_srq_arm);
254 int mlx4_srq_query(struct mlx4_dev *dev, struct mlx4_srq *srq, int *limit_watermark)
256 struct mlx4_cmd_mailbox *mailbox;
257 struct mlx4_srq_context *srq_context;
260 mailbox = mlx4_alloc_cmd_mailbox(dev);
262 return PTR_ERR(mailbox);
264 srq_context = mailbox->buf;
266 err = mlx4_QUERY_SRQ(dev, mailbox, srq->srqn);
269 *limit_watermark = be16_to_cpu(srq_context->limit_watermark);
272 mlx4_free_cmd_mailbox(dev, mailbox);
275 EXPORT_SYMBOL_GPL(mlx4_srq_query);
277 int mlx4_init_srq_table(struct mlx4_dev *dev)
279 struct mlx4_srq_table *srq_table = &mlx4_priv(dev)->srq_table;
282 spin_lock_init(&srq_table->lock);
283 INIT_RADIX_TREE(&srq_table->tree, GFP_ATOMIC);
284 if (mlx4_is_slave(dev))
287 err = mlx4_bitmap_init(&srq_table->bitmap, dev->caps.num_srqs,
288 dev->caps.num_srqs - 1, dev->caps.reserved_srqs, 0);
295 void mlx4_cleanup_srq_table(struct mlx4_dev *dev)
297 if (mlx4_is_slave(dev))
299 mlx4_bitmap_cleanup(&mlx4_priv(dev)->srq_table.bitmap);