2 * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
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8 * OpenIB.org BSD license below:
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11 * without modification, are permitted provided that the following
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15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
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23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 #ifndef MTHCA_MEMFREE_H
36 #define MTHCA_MEMFREE_H
38 #include <linux/list.h>
39 #include <linux/pci.h>
41 #include <asm/semaphore.h>
43 #define MTHCA_ICM_CHUNK_LEN \
44 ((256 - sizeof (struct list_head) - 2 * sizeof (int)) / \
45 (sizeof (struct scatterlist)))
47 struct mthca_icm_chunk {
48 struct list_head list;
51 struct scatterlist mem[MTHCA_ICM_CHUNK_LEN];
55 struct list_head chunk_list;
58 struct mthca_icm_table {
62 struct mthca_icm *icm[0];
65 struct mthca_icm_iter {
66 struct mthca_icm *icm;
67 struct mthca_icm_chunk *chunk;
73 struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages,
74 unsigned int gfp_mask);
75 void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm);
77 struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev,
78 u64 virt, unsigned size,
81 void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table);
83 static inline void mthca_icm_first(struct mthca_icm *icm,
84 struct mthca_icm_iter *iter)
87 iter->chunk = list_empty(&icm->chunk_list) ?
88 NULL : list_entry(icm->chunk_list.next,
89 struct mthca_icm_chunk, list);
93 static inline int mthca_icm_last(struct mthca_icm_iter *iter)
98 static inline void mthca_icm_next(struct mthca_icm_iter *iter)
100 if (++iter->page_idx >= iter->chunk->nsg) {
101 if (iter->chunk->list.next == &iter->icm->chunk_list) {
106 iter->chunk = list_entry(iter->chunk->list.next,
107 struct mthca_icm_chunk, list);
112 static inline dma_addr_t mthca_icm_addr(struct mthca_icm_iter *iter)
114 return sg_dma_address(&iter->chunk->mem[iter->page_idx]);
117 static inline unsigned long mthca_icm_size(struct mthca_icm_iter *iter)
119 return sg_dma_len(&iter->chunk->mem[iter->page_idx]);
122 #endif /* MTHCA_MEMFREE_H */