1 /**************************************************************************/ /*!
3 @Title PMR implementation of OS derived physical memory
4 @Copyright Copyright (c) Imagination Technologies Ltd. All Rights Reserved
5 @Description Part of the memory management. This module is
6 responsible for the an implementation of the "PMR"
7 abstraction. This interface is for the
8 PhysmemNewOSRamBackedPMR() "PMR Factory" which is
9 responsible for claiming chunks of memory (in
10 particular physically contiguous quanta) from the
13 As such, this interface will be implemented on a
14 Per-OS basis, in the "env" directory for that system.
15 A dummy implementation is available in
16 physmem_osmem_dummy.c for operating systems that
17 cannot, or do not wish to, offer this functionality.
18 @License Dual MIT/GPLv2
20 The contents of this file are subject to the MIT license as set out below.
22 Permission is hereby granted, free of charge, to any person obtaining a copy
23 of this software and associated documentation files (the "Software"), to deal
24 in the Software without restriction, including without limitation the rights
25 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
26 copies of the Software, and to permit persons to whom the Software is
27 furnished to do so, subject to the following conditions:
29 The above copyright notice and this permission notice shall be included in
30 all copies or substantial portions of the Software.
32 Alternatively, the contents of this file may be used under the terms of
33 the GNU General Public License Version 2 ("GPL") in which case the provisions
34 of GPL are applicable instead of those above.
36 If you wish to allow use of your version of this file only under the terms of
37 GPL, and not to allow others to use your version of this file under the terms
38 of the MIT license, indicate your decision by deleting the provisions above
39 and replace them with the notice and other provisions required by GPL as set
40 out in the file called "GPL-COPYING" included in this distribution. If you do
41 not delete the provisions above, a recipient may use your version of this file
42 under the terms of either the MIT license or GPL.
44 This License is also included in this distribution in the file called
47 EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) THE SOFTWARE IS
48 PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
49 BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
50 PURPOSE AND NONINFRINGEMENT; AND (B) IN NO EVENT SHALL THE AUTHORS OR
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54 */ /***************************************************************************/
55 #ifndef _SRVSRV_PHYSMEM_OSMEM_H_
56 #define _SRVSRV_PHYSMEM_OSMEM_H_
59 #include "img_types.h"
60 #include "pvrsrv_error.h"
61 #include "pvrsrv_memallocflags.h"
63 /* services/server/include/ */
67 /*************************************************************************/ /*!
68 @Function PhysmemNewOSRamBackedPMR
69 @Description Rogue Services will call this function to allocate GPU device
70 memory from the PMR factory supported by the OS DDK port. This
71 factory typically obtains physical memory from the kernel/OS
72 API that allocates memory from the default heap of shared system
73 memory available on the platform. The allocated memory must be
74 page-aligned and be a whole number of pages.
75 After allocating the required memory, the implementation must
76 then call PMRCreatePMR() to obtain the PMR structure that
77 describes this allocation to the upper layers of the Services.
78 memory management sub-system.
79 NB. Implementation of this function is mandatory. If shared
80 system memory is not to be used in the OS port then the
81 implementation must return PVRSRV_ERROR_NOT_SUPPORTED.
83 @Input psDevNode the device node
84 @Input uiSize the size of the allocation
85 (must be a multiple of page size)
86 @Input uiChunkSize when sparse allocations are requested,
87 this is the allocated chunk size.
88 For regular allocations, this will be
90 (must be a multiple of page size)
91 @Input ui32NumPhysChunks when sparse allocations are requested,
92 this is the number of physical chunks
94 For regular allocations, this will be 1.
95 @Input ui32NumVirtChunks when sparse allocations are requested,
96 this is the number of virtual chunks
97 covering the sparse allocation.
98 For regular allocations, this will be 1.
99 @Input pui32MappingTable when sparse allocations are requested,
100 this is the list of the indices of
101 each physically-backed virtual chunk
102 For regular allocations, this will
104 @Input uiLog2PageSize the physical pagesize in log2(bytes).
105 @Input uiFlags the allocation flags.
106 @Input pszAnnotation string describing the PMR (for debug).
107 This should be passed into the function
109 @Output ppsPMROut pointer to the PMR created for the
111 @Return PVRSRV_OK on success, a failure code otherwise.
112 */ /**************************************************************************/
114 PhysmemNewOSRamBackedPMR(PVRSRV_DEVICE_NODE *psDevNode,
115 IMG_DEVMEM_SIZE_T uiSize,
116 IMG_DEVMEM_SIZE_T uiChunkSize,
117 IMG_UINT32 ui32NumPhysChunks,
118 IMG_UINT32 ui32NumVirtChunks,
119 IMG_UINT32 *pui32MappingTable,
120 IMG_UINT32 uiLog2PageSize,
121 PVRSRV_MEMALLOCFLAGS_T uiFlags,
122 const IMG_CHAR *pszAnnotation,
125 #endif /* #ifndef _SRVSRV_PHYSMEM_OSMEM_H_ */