summaryrefslogtreecommitdiffstats
path: root/drivers/infiniband/hw/mthca/mthca_memfree.h
blob: 29433f295253afc530169a10cbe4c7e5f96a66b3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
/*
 * Copyright (c) 2004, 2005 Topspin Communications.  All rights reserved.
 * Copyright (c) 2005 Cisco Systems.  All rights reserved.
 * Copyright (c) 2005 Mellanox Technologies. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * $Id$
 */

#ifndef MTHCA_MEMFREE_H
#define MTHCA_MEMFREE_H

#include <linux/list.h>
#include <linux/pci.h>

#include <asm/semaphore.h>

#define MTHCA_ICM_CHUNK_LEN \
	((256 - sizeof (struct list_head) - 2 * sizeof (int)) /		\
	 (sizeof (struct scatterlist)))

struct mthca_icm_chunk {
	struct list_head   list;
	int                npages;
	int                nsg;
	struct scatterlist mem[MTHCA_ICM_CHUNK_LEN];
};

struct mthca_icm {
	struct list_head chunk_list;
	int              refcount;
};

struct mthca_icm_table {
	u64               virt;
	int               num_icm;
	int               num_obj;
	int               obj_size;
	int               lowmem;
	struct semaphore  mutex;
	struct mthca_icm *icm[0];
};

struct mthca_icm_iter {
	struct mthca_icm       *icm;
	struct mthca_icm_chunk *chunk;
	int                     page_idx;
};

struct mthca_dev;

struct mthca_icm *mthca_alloc_icm(struct mthca_dev *dev, int npages,
				  gfp_t gfp_mask);
void mthca_free_icm(struct mthca_dev *dev, struct mthca_icm *icm);

struct mthca_icm_table *mthca_alloc_icm_table(struct mthca_dev *dev,
					      u64 virt, int obj_size,
					      int nobj, int reserved,
					      int use_lowmem);
void mthca_free_icm_table(struct mthca_dev *dev, struct mthca_icm_table *table);
int mthca_table_get(struct mthca_dev *dev, struct mthca_icm_table *table, int obj);
void mthca_table_put(struct mthca_dev *dev, struct mthca_icm_table *table, int obj);
void *mthca_table_find(struct mthca_icm_table *table, int obj);
int mthca_table_get_range(struct mthca_dev *dev, struct mthca_icm_table *table,
			  int start, int end);
void mthca_table_put_range(struct mthca_dev *dev, struct mthca_icm_table *table,
			   int start, int end);

static inline void mthca_icm_first(struct mthca_icm *icm,
				   struct mthca_icm_iter *iter)
{
	iter->icm      = icm;
	iter->chunk    = list_empty(&icm->chunk_list) ?
		NULL : list_entry(icm->chunk_list.next,
				  struct mthca_icm_chunk, list);
	iter->page_idx = 0;
}

static inline int mthca_icm_last(struct mthca_icm_iter *iter)
{
	return !iter->chunk;
}

static inline void mthca_icm_next(struct mthca_icm_iter *iter)
{
	if (++iter->page_idx >= iter->chunk->nsg) {
		if (iter->chunk->list.next == &iter->icm->chunk_list) {
			iter->chunk = NULL;
			return;
		}

		iter->chunk = list_entry(iter->chunk->list.next,
					 struct mthca_icm_chunk, list);
		iter->page_idx = 0;
	}
}

static inline dma_addr_t mthca_icm_addr(struct mthca_icm_iter *iter)
{
	return sg_dma_address(&iter->chunk->mem[iter->page_idx]);
}

static inline unsigned long mthca_icm_size(struct mthca_icm_iter *iter)
{
	return sg_dma_len(&iter->chunk->mem[iter->page_idx]);
}

enum {
	MTHCA_DB_REC_PER_PAGE = 4096 / 8
};

struct mthca_db_page {
	DECLARE_BITMAP(used, MTHCA_DB_REC_PER_PAGE);
	__be64    *db_rec;
	dma_addr_t mapping;
};

struct mthca_db_table {
	int 	       	      npages;
	int 	       	      max_group1;
	int 	       	      min_group2;
	struct mthca_db_page *page;
	struct semaphore      mutex;
};

enum mthca_db_type {
	MTHCA_DB_TYPE_INVALID   = 0x0,
	MTHCA_DB_TYPE_CQ_SET_CI = 0x1,
	MTHCA_DB_TYPE_CQ_ARM    = 0x2,
	MTHCA_DB_TYPE_SQ        = 0x3,
	MTHCA_DB_TYPE_RQ        = 0x4,
	MTHCA_DB_TYPE_SRQ       = 0x5,
	MTHCA_DB_TYPE_GROUP_SEP = 0x7
};

struct mthca_user_db_table;
struct mthca_uar;

int mthca_map_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
		      struct mthca_user_db_table *db_tab, int index, u64 uaddr);
void mthca_unmap_user_db(struct mthca_dev *dev, struct mthca_uar *uar,
			 struct mthca_user_db_table *db_tab, int index);
struct mthca_user_db_table *mthca_init_user_db_tab(struct mthca_dev *dev);
void mthca_cleanup_user_db_tab(struct mthca_dev *dev, struct mthca_uar *uar,
			       struct mthca_user_db_table *db_tab);

int mthca_init_db_tab(struct mthca_dev *dev);
void mthca_cleanup_db_tab(struct mthca_dev *dev);
int mthca_alloc_db(struct mthca_dev *dev, int type, u32 qn, __be32 **db);
void mthca_free_db(struct mthca_dev *dev, int type, int db_index);

#endif /* MTHCA_MEMFREE_H */
OpenPOWER on IntegriCloud