/*************************************************************************/ /*!
@File
@Title          PhysmemNewOSRamBackedPMR function declaration header
@Copyright      Copyright (c) Imagination Technologies Ltd. All Rights Reserved
@Description    Part of Services memory management.  This file defines the
                OS memory PMR factory API that must be defined so that the
                common & device layer code in the Services Server can allocate
                new PMRs back with pages from the OS page allocator. Applicable
                for UMA based platforms, such platforms must implement this API
                in the OS Porting layer, in the "env" directory for that
                system.

@License        Dual MIT/GPLv2

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*/ /**************************************************************************/

#ifndef _PHYSMEM_OSMEM_H_
#define _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().
@Input          uiPid            The process ID that this allocation should
                                 be associated with.
@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,
                         IMG_PID uiPid,
                         PMR **ppsPMROut);

#endif /* #ifndef _PHYSMEM_OSMEM_H_ */