drivers/gpu/drm/img-rogue/physmem_osmem.h

/**************************************************************************/ /*!
@File
@Title		PMR implementation of OS derived physical memory
@Copyright      Copyright (c) Imagination Technologies Ltd. All Rights Reserved
@Description	Part of the memory management.  This module is
                responsible for the an implementation of the "PMR"
                abstraction.  This interface is for the
                PhysmemNewOSRamBackedPMR() "PMR Factory" which is
                responsible for claiming chunks of memory (in
                particular physically contiguous quanta) from the
                Operating System.

                As such, this interface will be implemented on a
                Per-OS basis, in the "env" directory for that system.
                A dummy implementation is available in
                physmem_osmem_dummy.c for operating systems that
                cannot, or do not wish to, offer this functionality.
@License        Dual MIT/GPLv2

The contents of this file are subject to the MIT license as set out below.

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of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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EXCEPT AS OTHERWISE STATED IN A NEGOTIATED AGREEMENT: (A) THE SOFTWARE IS
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*/ /***************************************************************************/
#ifndef _SRVSRV_PHYSMEM_OSMEM_H_
#define _SRVSRV_PHYSMEM_OSMEM_H_

/* include/ */
#include "img_types.h"
#include "pvrsrv_error.h"
#include "pvrsrv_memallocflags.h"

/* services/server/include/ */
#include "pmr.h"
#include "pmr_impl.h"

/*************************************************************************/ /*!
@Function       PhysmemNewOSRamBackedPMR
@Description    Rogue Services will call this function to allocate GPU device 
                memory from the PMR factory supported by the OS DDK port. This 
                factory typically obtains physical memory from the kernel/OS 
                API that allocates memory from the default heap of shared system 
                memory available on the platform. The allocated memory must be 
                page-aligned and be a whole number of pages. 
                After allocating the required memory, the implementation must 
                then call PMRCreatePMR() to obtain the PMR structure that 
                describes this allocation to the upper layers of the Services.
                memory management sub-system. 
                NB. Implementation of this function is mandatory. If shared 
                system memory is not to be used in the OS port then the 
                implementation must return PVRSRV_ERROR_NOT_SUPPORTED.

@Input          psDevNode        the device node
@Input          uiSize           the size of the allocation
                                 (must be a multiple of page size)
@Input          uiChunkSize      when sparse allocations are requested,
                                 this is the allocated chunk size.
                                 For regular allocations, this will be
                                 the same as uiSize.
                                 (must be a multiple of page size)
@Input          ui32NumPhysChunks  when sparse allocations are requested,
                                   this is the number of physical chunks
                                   to be allocated.
                                   For regular allocations, this will be 1.
@Input          ui32NumVirtChunks  when sparse allocations are requested,
                                   this is the number of virtual chunks
                                   covering the sparse allocation.
                                   For regular allocations, this will be 1.
@Input          pui32MappingTable  when sparse allocations are requested,
                                   this is the list of the indices of
                                   each physically-backed virtual chunk
                                   For regular allocations, this will
                                   be NULL.
@Input          uiLog2PageSize   the physical pagesize in log2(bytes).
@Input          uiFlags          the allocation flags.
@Input          pszAnnotation    string describing the PMR (for debug).
                                 This should be passed into the function
                                 PMRCreatePMR().
@Output         ppsPMROut        pointer to the PMR created for the
                                 new allocation
@Return         PVRSRV_OK on success, a failure code otherwise.
*/ /**************************************************************************/
extern PVRSRV_ERROR
PhysmemNewOSRamBackedPMR(PVRSRV_DEVICE_NODE *psDevNode,
                         IMG_DEVMEM_SIZE_T uiSize,
						 IMG_DEVMEM_SIZE_T uiChunkSize,
						 IMG_UINT32 ui32NumPhysChunks,
						 IMG_UINT32 ui32NumVirtChunks,
						 IMG_UINT32 *pui32MappingTable,
                         IMG_UINT32 uiLog2PageSize,
                         PVRSRV_MEMALLOCFLAGS_T uiFlags,
                         const IMG_CHAR *pszAnnotation,
                         PMR **ppsPMROut);

#endif /* #ifndef _SRVSRV_PHYSMEM_OSMEM_H_ */