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.
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:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
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.
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
37 #ifndef MTHCA_MEMFREE_H
38 #define MTHCA_MEMFREE_H
40 #include <linux/list.h>
41 #include <linux/pci.h>
42 #include <linux/mutex.h>
44 #define MTHCA_ICM_CHUNK_LEN \
45 ((256 - sizeof (struct list_head) - 2 * sizeof (int)) / \
46 (sizeof (struct scatterlist)))
49 MTHCA_ICM_PAGE_SHIFT = 12,
50 MTHCA_ICM_PAGE_SIZE = 1 << MTHCA_ICM_PAGE_SHIFT,
51 MTHCA_DB_REC_PER_PAGE = MTHCA_ICM_PAGE_SIZE / 8
54 struct mthca_icm_chunk {
55 struct list_head list;
58 struct scatterlist mem[MTHCA_ICM_CHUNK_LEN];
62 struct list_head chunk_list;
66 struct mthca_icm_table {
74 struct mthca_icm *icm[0];
77 struct mthca_icm_iter {
78 struct mthca_icm *icm;
79 struct mthca_icm_chunk *chunk;
85 struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages,
86 gfp_t gfp_mask, int coherent);
87 void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm, int coherent);
89 struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev,
90 u64 virt, int obj_size,
91 int nobj, int reserved,
92 int use_lowmem, int use_coherent);
93 void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table);
94 int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj);
95 void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj);
96 void *mthca_table_find(struct mthca_icm_table *table, int obj, dma_addr_t *dma_handle);
97 int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table,
99 void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table,
102 static inline void mthca_icm_first(struct mthca_icm *icm,
103 struct mthca_icm_iter *iter)
106 iter->chunk = list_empty(&icm->chunk_list) ?
107 NULL : list_entry(icm->chunk_list.next,
108 struct mthca_icm_chunk, list);
112 static inline int mthca_icm_last(struct mthca_icm_iter *iter)
117 static inline void mthca_icm_next(struct mthca_icm_iter *iter)
119 if (++iter->page_idx >= iter->chunk->nsg) {
120 if (iter->chunk->list.next == &iter->icm->chunk_list) {
125 iter->chunk = list_entry(iter->chunk->list.next,
126 struct mthca_icm_chunk, list);
131 static inline dma_addr_t mthca_icm_addr(struct mthca_icm_iter *iter)
133 return sg_dma_address(&iter->chunk->mem[iter->page_idx]);
136 static inline unsigned long mthca_icm_size(struct mthca_icm_iter *iter)
138 return sg_dma_len(&iter->chunk->mem[iter->page_idx]);
141 struct mthca_db_page {
142 DECLARE_BITMAP(used, MTHCA_DB_REC_PER_PAGE);
147 struct mthca_db_table {
151 struct mthca_db_page *page;
156 MTHCA_DB_TYPE_INVALID = 0x0,
157 MTHCA_DB_TYPE_CQ_SET_CI = 0x1,
158 MTHCA_DB_TYPE_CQ_ARM = 0x2,
159 MTHCA_DB_TYPE_SQ = 0x3,
160 MTHCA_DB_TYPE_RQ = 0x4,
161 MTHCA_DB_TYPE_SRQ = 0x5,
162 MTHCA_DB_TYPE_GROUP_SEP = 0x7
165 struct mthca_user_db_table;
168 int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
169 struct mthca_user_db_table *db_tab, int index, u64 uaddr);
170 void mthca_unmap_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
171 struct mthca_user_db_table *db_tab, int index);
172 struct mthca_user_db_table *mthca_init_user_db_tab(struct mthca_dev *dev);
173 void mthca_cleanup_user_db_tab(struct mthca_dev *dev, struct mthca_uar *uar,
174 struct mthca_user_db_table *db_tab);
176 int mthca_init_db_tab(struct mthca_dev *dev);
177 void mthca_cleanup_db_tab(struct mthca_dev *dev);
178 int mthca_alloc_db(struct mthca_dev *dev, enum mthca_db_type type,
179 u32 qn, __be32 **db);
180 void mthca_free_db(struct mthca_dev *dev, int type, int db_index);
182 #endif /* MTHCA_MEMFREE_H */