2 * Copyright (c) 2005, 2006, 2007, 2008 Mellanox Technologies. All rights reserved.
3 * Copyright (c) 2006, 2007 Cisco Systems, Inc. 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
7 * General Public License (GPL) Version 2, available from the file
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9 * OpenIB.org BSD license below:
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12 * without modification, are permitted provided that the following
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16 * copyright notice, this list of conditions and the following
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20 * copyright notice, this list of conditions and the following
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22 * provided with the distribution.
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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
,
56 struct mlx4_icm_chunk
{
57 struct list_head list
;
62 struct scatterlist sg
[MLX4_ICM_CHUNK_LEN
];
63 struct mlx4_icm_buf buf
[MLX4_ICM_CHUNK_LEN
];
68 struct list_head chunk_list
;
72 struct mlx4_icm_iter
{
74 struct mlx4_icm_chunk
*chunk
;
80 struct mlx4_icm
*mlx4_alloc_icm(struct mlx4_dev
*dev
, int npages
,
81 gfp_t gfp_mask
, int coherent
);
82 void mlx4_free_icm(struct mlx4_dev
*dev
, struct mlx4_icm
*icm
, int coherent
);
84 int mlx4_table_get(struct mlx4_dev
*dev
, struct mlx4_icm_table
*table
, u32 obj
);
85 void mlx4_table_put(struct mlx4_dev
*dev
, struct mlx4_icm_table
*table
, u32 obj
);
86 int mlx4_table_get_range(struct mlx4_dev
*dev
, struct mlx4_icm_table
*table
,
88 void mlx4_table_put_range(struct mlx4_dev
*dev
, struct mlx4_icm_table
*table
,
90 int mlx4_init_icm_table(struct mlx4_dev
*dev
, struct mlx4_icm_table
*table
,
91 u64 virt
, int obj_size
, u32 nobj
, int reserved
,
92 int use_lowmem
, int use_coherent
);
93 void mlx4_cleanup_icm_table(struct mlx4_dev
*dev
, struct mlx4_icm_table
*table
);
94 void *mlx4_table_find(struct mlx4_icm_table
*table
, u32 obj
, dma_addr_t
*dma_handle
);
96 static inline void mlx4_icm_first(struct mlx4_icm
*icm
,
97 struct mlx4_icm_iter
*iter
)
100 iter
->chunk
= list_empty(&icm
->chunk_list
) ?
101 NULL
: list_entry(icm
->chunk_list
.next
,
102 struct mlx4_icm_chunk
, list
);
106 static inline int mlx4_icm_last(struct mlx4_icm_iter
*iter
)
111 static inline void mlx4_icm_next(struct mlx4_icm_iter
*iter
)
113 if (++iter
->page_idx
>= iter
->chunk
->nsg
) {
114 if (iter
->chunk
->list
.next
== &iter
->icm
->chunk_list
) {
119 iter
->chunk
= list_entry(iter
->chunk
->list
.next
,
120 struct mlx4_icm_chunk
, list
);
125 static inline dma_addr_t
mlx4_icm_addr(struct mlx4_icm_iter
*iter
)
127 if (iter
->chunk
->coherent
)
128 return iter
->chunk
->buf
[iter
->page_idx
].dma_addr
;
130 return sg_dma_address(&iter
->chunk
->sg
[iter
->page_idx
]);
133 static inline unsigned long mlx4_icm_size(struct mlx4_icm_iter
*iter
)
135 if (iter
->chunk
->coherent
)
136 return iter
->chunk
->buf
[iter
->page_idx
].size
;
138 return sg_dma_len(&iter
->chunk
->sg
[iter
->page_idx
]);
141 int mlx4_MAP_ICM_AUX(struct mlx4_dev
*dev
, struct mlx4_icm
*icm
);
142 int mlx4_UNMAP_ICM_AUX(struct mlx4_dev
*dev
);
144 #endif /* MLX4_ICM_H */