1 /*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
13 * disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29 #ifndef _LINUXKPI_LINUX_DMAPOOL_H_
30 #define _LINUXKPI_LINUX_DMAPOOL_H_
31
32 #include <linux/types.h>
33 #include <linux/io.h>
34 #include <linux/scatterlist.h>
35 #include <linux/device.h>
36 #include <linux/slab.h>
37
38 struct dma_pool;
39 struct dma_pool *linux_dma_pool_create(char *name, struct device *dev,
40 size_t size, size_t align, size_t boundary);
41 void linux_dma_pool_destroy(struct dma_pool *pool);
42 void lkpi_dmam_pool_destroy(struct device *, void *);
43 void *linux_dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
44 dma_addr_t *handle);
45 void linux_dma_pool_free(struct dma_pool *pool, void *vaddr,
46 dma_addr_t dma_addr);
47
48 static inline struct dma_pool *
dma_pool_create(char * name,struct device * dev,size_t size,size_t align,size_t boundary)49 dma_pool_create(char *name, struct device *dev, size_t size,
50 size_t align, size_t boundary)
51 {
52
53 return (linux_dma_pool_create(name, dev, size, align, boundary));
54 }
55
56 static inline struct dma_pool *
dmam_pool_create(char * name,struct device * dev,size_t size,size_t align,size_t boundary)57 dmam_pool_create(/* const */ char *name, struct device *dev, size_t size,
58 size_t align, size_t boundary)
59 {
60 struct dma_pool **pp;
61
62 pp = devres_alloc(lkpi_dmam_pool_destroy, sizeof(*pp), GFP_KERNEL);
63 if (pp == NULL)
64 return (NULL);
65 *pp = linux_dma_pool_create(name, dev, size, align, boundary);
66 if (*pp == NULL) {
67 devres_free(pp);
68 return (NULL);
69 }
70
71 devres_add(dev, pp);
72 return (*pp);
73 }
74
75 static inline void
dma_pool_destroy(struct dma_pool * pool)76 dma_pool_destroy(struct dma_pool *pool)
77 {
78
79 linux_dma_pool_destroy(pool);
80 }
81
82 static inline void *
dma_pool_alloc(struct dma_pool * pool,gfp_t mem_flags,dma_addr_t * handle)83 dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags, dma_addr_t *handle)
84 {
85
86 return (linux_dma_pool_alloc(pool, mem_flags, handle));
87 }
88
89 static inline void *
dma_pool_zalloc(struct dma_pool * pool,gfp_t mem_flags,dma_addr_t * handle)90 dma_pool_zalloc(struct dma_pool *pool, gfp_t mem_flags, dma_addr_t *handle)
91 {
92
93 return (dma_pool_alloc(pool, mem_flags | __GFP_ZERO, handle));
94 }
95
96 static inline void
dma_pool_free(struct dma_pool * pool,void * vaddr,dma_addr_t dma_addr)97 dma_pool_free(struct dma_pool *pool, void *vaddr, dma_addr_t dma_addr)
98 {
99
100 linux_dma_pool_free(pool, vaddr, dma_addr);
101 }
102
103 #endif /* _LINUXKPI_LINUX_DMAPOOL_H_ */
104