2 * Copyright (c) 2013 Qualcomm Atheros, Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted (subject to the limitations in the
7 * disclaimer below) provided that the following conditions are met:
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
12 * * Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the
17 * * Neither the name of Qualcomm Atheros nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE
22 * GRANTED BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT
23 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
31 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
32 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
33 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 * @ingroup adf_os_public
38 * This file abstracts DMA operations.
44 #include <adf_os_types.h>
45 #include <adf_os_dma_pvt.h>
48 * @brief a dma address representation of a platform
52 * @brief Allocate a DMA buffer and map it to local bus address space
54 * @param[in] osdev platform device instance
55 * @param[in] size DMA buffer size
56 * @param[in] coherent 0 => cached.
57 * @param[out] dmap opaque coherent memory handle
59 * @return returns the virtual address of the memory
62 adf_os_dmamem_alloc(adf_os_device_t osdev,
65 adf_os_dma_map_t *dmap)
67 return __adf_os_dmamem_alloc(osdev, size, coherent, dmap);
71 * @brief Free a previously mapped DMA buffer
73 * @param[in] osdev platform device instance
74 * @param[in] size DMA buffer size
75 * @param[in] coherent 0 => cached.
76 * @param[in] vaddr virtual address of DMA buffer
77 * @param[in] dmap memory handle
80 adf_os_dmamem_free(adf_os_device_t osdev,
84 adf_os_dma_map_t dmap)
86 __adf_os_dmamem_free(osdev, size, coherent, vaddr, dmap);
90 * @brief given a dmamem map, returns the (bus) address
92 * @param[in] dmap memory handle
94 * @return the (bus) address
96 static inline adf_os_dma_addr_t
97 adf_os_dmamem_map2addr(adf_os_dma_map_t dmap)
99 return(__adf_os_dmamem_map2addr(dmap));
103 * @brief Flush and invalidate cache for a given dmamem map
105 * @param[in] osdev platform device instance
106 * @param[in] dmap mem handle
107 * @param[in] op op code for sync type, (see @ref adf_os_types.h)
110 adf_os_dmamem_cache_sync(adf_os_device_t osdev,
111 adf_os_dma_map_t dmap,
112 adf_os_cache_sync_t op)
114 __adf_os_dmamem_cache_sync(osdev, dmap, op);
118 * @brief Get the cpu cache line size
120 * @return The CPU cache line size in bytes.
122 static inline adf_os_size_t
123 adf_os_cache_line_size(void)
125 return __adf_os_cache_line_size();