1 /*************************************************************************/ /*!
2 @Title DmaBuf driver inter-operability code.
3 @Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved
4 @License Dual MIT/GPLv2
6 The contents of this file are subject to the MIT license as set out below.
8 Permission is hereby granted, free of charge, to any person obtaining a copy
9 of this software and associated documentation files (the "Software"), to deal
10 in the Software without restriction, including without limitation the rights
11 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 copies of the Software, and to permit persons to whom the Software is
13 furnished to do so, subject to the following conditions:
15 The above copyright notice and this permission notice shall be included in
16 all copies or substantial portions of the Software.
18 Alternatively, the contents of this file may be used under the terms of
19 the GNU General Public License Version 2 ("GPL") in which case the provisions
20 of GPL are applicable instead of those above.
22 If you wish to allow use of your version of this file only under the terms of
23 GPL, and not to allow others to use your version of this file under the terms
24 of the MIT license, indicate your decision by deleting the provisions above
25 and replace them with the notice and other provisions required by GPL as set
26 out in the file called "GPL-COPYING" included in this distribution. If you do
27 not delete the provisions above, a recipient may use your version of this file
28 under the terms of either the MIT license or GPL.
30 This License is also included in this distribution in the file called
31 "MIT-COPYING".
33 EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) THE SOFTWARE IS
34 PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
35 BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
36 PURPOSE AND NONINFRINGEMENT; AND (B) IN NO EVENT SHALL THE AUTHORS OR
37 COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
38 IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
39 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 */ /**************************************************************************/
42 #ifndef __IMG_LINUX_DMABUF_H__
43 #define __IMG_LINUX_DMABUF_H__
45 #if defined(SUPPORT_DMABUF)
47 #include <linux/version.h>
49 #include "img_types.h"
50 #include "servicesext.h"
52 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,17,0))
53 #include <linux/reservation.h>
54 #include "pvr_bridge.h"
56 struct dmabuf_resvinfo
57 {
58 struct reservation_object *resv;
59 };
61 static inline void *DmaBufGetReservationObject(IMG_HANDLE hSync)
62 {
63 struct dmabuf_resvinfo *info;
65 info = (struct dmabuf_resvinfo *)hSync;
67 return info->resv;
68 }
69 #else
70 static inline void *DmaBufGetReservationObject(IMG_HANDLE hSync)
71 {
72 (void) hSync;
74 return (void *)0;
75 }
76 #endif
78 PVRSRV_ERROR DmaBufInit(IMG_VOID);
80 IMG_VOID DmaBufDeinit(IMG_VOID);
82 PVRSRV_ERROR DmaBufImportAndAcquirePhysAddr(const IMG_INT32 i32DmaBufFD,
83 const IMG_SIZE_T uiDmaBufOffset,
84 const IMG_SIZE_T uiSize,
85 IMG_UINT32 *pui32PageCount,
86 IMG_SYS_PHYADDR **ppsSysPhysAddr,
87 IMG_SIZE_T *puiMemInfoOffset,
88 IMG_PVOID *ppvKernAddr,
89 IMG_HANDLE *phImport,
90 IMG_HANDLE *phUnique);
92 IMG_VOID DmaBufUnimportAndReleasePhysAddr(IMG_HANDLE hImport);
94 IMG_HANDLE DmaBufGetNativeSyncHandle(IMG_HANDLE hImport);
95 void DmaBufFreeNativeSyncHandle(IMG_HANDLE hSync);
96 #endif /* defined(SUPPORT_DMABUF) */
98 #endif /* __IMG_LINUX_DMABUF_H__ */