1 /*
2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
3 * Copyright (c) 2005 Cisco Systems. All rights reserved.
4 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
5 *
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
18 * disclaimer.
19 *
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
24 *
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
32 * SOFTWARE.
33 *
34 * $Id$
35 */
36
37 #ifndef MTHCA_MEMFREE_H
38 #define MTHCA_MEMFREE_H
39
40 #include <linux/list.h>
41 #include <linux/mutex.h>
42
43 #define MTHCA_ICM_CHUNK_LEN \
44 ((256 - sizeof (struct list_head) - 2 * sizeof (int)) / \
45 (sizeof (struct scatterlist)))
46
47 enum {
48 MTHCA_ICM_PAGE_SHIFT = 12,
49 MTHCA_ICM_PAGE_SIZE = 1 << MTHCA_ICM_PAGE_SHIFT,
50 MTHCA_DB_REC_PER_PAGE = MTHCA_ICM_PAGE_SIZE / 8
51 };
52
53 struct mthca_icm_chunk {
54 struct list_head list;
55 int npages;
56 int nsg;
57 struct scatterlist mem[MTHCA_ICM_CHUNK_LEN];
58 };
59
60 struct mthca_icm {
61 struct list_head chunk_list;
62 int refcount;
63 };
64
65 struct mthca_icm_table {
66 u64 virt;
67 int num_icm;
68 int num_obj;
69 int obj_size;
70 int lowmem;
71 int coherent;
72 struct mutex mutex;
73 struct mthca_icm *icm[0];
74 };
75
76 struct mthca_icm_iter {
77 struct mthca_icm *icm;
78 struct mthca_icm_chunk *chunk;
79 int page_idx;
80 };
81
82 struct mthca_dev;
83
84 struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages,
85 gfp_t gfp_mask, int coherent);
86 void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm, int coherent);
87
88 struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev,
89 u64 virt, int obj_size,
90 int nobj, int reserved,
91 int use_lowmem, int use_coherent);
92 void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table);
93 int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj);
94 void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj);
95 void *mthca_table_find(struct mthca_icm_table *table, int obj, dma_addr_t *dma_handle);
96 int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table,
97 int start, int end);
98 void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table,
99 int start, int end);
100
101 static inline void mthca_icm_first(struct mthca_icm *icm,
102 struct mthca_icm_iter *iter)
103 {
104 iter->icm = icm;
105 iter->chunk = list_empty(&icm->chunk_list) ?
106 NULL : list_entry(icm->chunk_list.next,
107 struct mthca_icm_chunk, list);
108 iter->page_idx = 0;
109 }
110
111 static inline int mthca_icm_last(struct mthca_icm_iter *iter)
112 {
113 return !iter->chunk;
114 }
115
116 static inline void mthca_icm_next(struct mthca_icm_iter *iter)
117 {
118 if (++iter->page_idx >= iter->chunk->nsg) {
119 if (iter->chunk->list.next == &iter->icm->chunk_list) {
120 iter->chunk = NULL;
121 return;
122 }
123
124 iter->chunk = list_entry(iter->chunk->list.next,
125 struct mthca_icm_chunk, list);
126 iter->page_idx = 0;
127 }
128 }
129
130 static inline dma_addr_t mthca_icm_addr(struct mthca_icm_iter *iter)
131 {
132 return sg_dma_address(&iter->chunk->mem[iter->page_idx]);
133 }
134
135 static inline unsigned long mthca_icm_size(struct mthca_icm_iter *iter)
136 {
137 return sg_dma_len(&iter->chunk->mem[iter->page_idx]);
138 }
139
140 struct mthca_db_page {
141 DECLARE_BITMAP(used, MTHCA_DB_REC_PER_PAGE);
142 __be64 *db_rec;
143 dma_addr_t mapping;
144 };
145
146 struct mthca_db_table {
147 int npages;
148 int max_group1;
149 int min_group2;
150 struct mthca_db_page *page;
151 struct mutex mutex;
152 };
153
154 enum mthca_db_type {
155 MTHCA_DB_TYPE_INVALID = 0x0,
156 MTHCA_DB_TYPE_CQ_SET_CI = 0x1,
157 MTHCA_DB_TYPE_CQ_ARM = 0x2,
158 MTHCA_DB_TYPE_SQ = 0x3,
159 MTHCA_DB_TYPE_RQ = 0x4,
160 MTHCA_DB_TYPE_SRQ = 0x5,
161 MTHCA_DB_TYPE_GROUP_SEP = 0x7
162 };
163
164 struct mthca_user_db_table;
165 struct mthca_uar;
166
167 int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
168 struct mthca_user_db_table *db_tab, int index, u64 uaddr);
169 void mthca_unmap_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
170 struct mthca_user_db_table *db_tab, int index);
171 struct mthca_user_db_table *mthca_init_user_db_tab(struct mthca_dev *dev);
172 void mthca_cleanup_user_db_tab(struct mthca_dev *dev, struct mthca_uar *uar,
173 struct mthca_user_db_table *db_tab);
174
175 int mthca_init_db_tab(struct mthca_dev *dev);
176 void mthca_cleanup_db_tab(struct mthca_dev *dev);
177 int mthca_alloc_db(struct mthca_dev *dev, enum mthca_db_type type,
178 u32 qn, __be32 **db);
179 void mthca_free_db(struct mthca_dev *dev, int type, int db_index);
180
181 #endif /* MTHCA_MEMFREE_H */
182
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