2 * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
3 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.
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37 #include <linux/list.h>
38 #include <linux/pci.h>
39 #include <linux/mutex.h>
41 #define MLX4_ICM_CHUNK_LEN \
42 ((256 - sizeof (struct list_head) - 2 * sizeof (int)) / \
43 (sizeof (struct scatterlist)))
46 MLX4_ICM_PAGE_SHIFT = 12,
47 MLX4_ICM_PAGE_SIZE = 1 << MLX4_ICM_PAGE_SHIFT,
50 struct mlx4_icm_chunk {
51 struct list_head list;
54 struct scatterlist mem[MLX4_ICM_CHUNK_LEN];
58 struct list_head chunk_list;
62 struct mlx4_icm_iter {
64 struct mlx4_icm_chunk *chunk;
70 struct mlx4_icm *mlx4_alloc_icm(struct mlx4_dev *dev, int npages,
71 gfp_t gfp_mask, int coherent);
72 void mlx4_free_icm(struct mlx4_dev *dev, struct mlx4_icm *icm, int coherent);
74 int mlx4_table_get(struct mlx4_dev *dev, struct mlx4_icm_table *table, int obj);
75 void mlx4_table_put(struct mlx4_dev *dev, struct mlx4_icm_table *table, int obj);
76 int mlx4_table_get_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
78 void mlx4_table_put_range(struct mlx4_dev *dev, struct mlx4_icm_table *table,
80 int mlx4_init_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table,
81 u64 virt, int obj_size, u32 nobj, int reserved,
82 int use_lowmem, int use_coherent);
83 void mlx4_cleanup_icm_table(struct mlx4_dev *dev, struct mlx4_icm_table *table);
84 void *mlx4_table_find(struct mlx4_icm_table *table, int obj, dma_addr_t *dma_handle);
86 static inline void mlx4_icm_first(struct mlx4_icm *icm,
87 struct mlx4_icm_iter *iter)
90 iter->chunk = list_empty(&icm->chunk_list) ?
91 NULL : list_entry(icm->chunk_list.next,
92 struct mlx4_icm_chunk, list);
96 static inline int mlx4_icm_last(struct mlx4_icm_iter *iter)
101 static inline void mlx4_icm_next(struct mlx4_icm_iter *iter)
103 if (++iter->page_idx >= iter->chunk->nsg) {
104 if (iter->chunk->list.next == &iter->icm->chunk_list) {
109 iter->chunk = list_entry(iter->chunk->list.next,
110 struct mlx4_icm_chunk, list);
115 static inline dma_addr_t mlx4_icm_addr(struct mlx4_icm_iter *iter)
117 return sg_dma_address(&iter->chunk->mem[iter->page_idx]);
120 static inline unsigned long mlx4_icm_size(struct mlx4_icm_iter *iter)
122 return sg_dma_len(&iter->chunk->mem[iter->page_idx]);
125 int mlx4_MAP_ICM_AUX(struct mlx4_dev *dev, struct mlx4_icm *icm);
126 int mlx4_UNMAP_ICM_AUX(struct mlx4_dev *dev);
128 #endif /* MLX4_ICM_H */