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

/*************************************************************************/ /*!
@File
@Title          Device Memory Management
@Copyright      Copyright (c) Imagination Technologies Ltd. All Rights Reserved
@Description    Client side part of device memory management -- this file
                is forked from new_devmem_allocation.h as this one has to
                reside in the top level include so that client code is able
                to make use of the typedefs.
@License        Dual MIT/GPLv2

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

#ifndef DEVICEMEM_TYPEDEFS_H
#define DEVICEMEM_TYPEDEFS_H

#include <powervr/mem_types.h>
#include "img_types.h"
#include "pvrsrv_memallocflags.h"

typedef struct _DEVMEM_CONTEXT_ DEVMEM_CONTEXT;		/*!< Convenience typedef for struct _DEVMEM_CONTEXT_ */
typedef struct _DEVMEM_HEAP_ DEVMEM_HEAP;			/*!< Convenience typedef for struct _DEVMEM_HEAP_ */
typedef struct _DEVMEM_MEMDESC_ DEVMEM_MEMDESC;		/*!< Convenience typedef for struct _DEVMEM_MEMDESC_ */
typedef struct _DEVMEM_PAGELIST_ DEVMEM_PAGELIST;	/*!< Convenience typedef for struct _DEVMEM_PAGELIST_ */
typedef PVRSRV_MEMALLOCFLAGS_T DEVMEM_FLAGS_T;		/*!< Conveneince typedef for PVRSRV_MEMALLOCFLAGS_T */

typedef IMG_HANDLE /* FIXME: should be a SID */ DEVMEM_EXPORTHANDLE; /*!< Typedef for DeviceMem Export Handle */
typedef IMG_UINT64 DEVMEM_EXPORTKEY;                                /*!< Typedef for DeviceMem Export Key */
typedef IMG_DEVMEM_SIZE_T DEVMEM_SIZE_T;                            /*!< Typedef for DeviceMem SIZE_T */
typedef IMG_DEVMEM_LOG2ALIGN_T DEVMEM_LOG2ALIGN_T;                  /*!< Typedef for DeviceMem LOG2 Alignment */

typedef struct _DEVMEMX_PHYS_MEMDESC_ DEVMEMX_PHYSDESC;    /*!< Convenience typedef for DevmemX physical */
typedef struct _DEVMEMX_VIRT_MEMDESC_ DEVMEMX_VIRTDESC;    /*!< Convenience typedef for DevmemX virtual */

/*! calling code needs all the info in this struct, to be able to pass it around */
typedef struct
{
    /*! A handle to the PMR.  Should be a SID.  FIXME: decide whether
       this is right... as the PMR would have to be a cross-process
       handle */
    IMG_HANDLE hPMRExportHandle;
    /*! The "key" to prove we have authorization to use this PMR */
    IMG_UINT64 uiPMRExportPassword;
    /*! Size and alignment properties for this PMR.  Note, these
       numbers are not trusted in kernel, but we need to cache them
       client-side in order to allocate from the VM arena.  The kernel
       will know the actual alignment and size of the PMR and thus
       would prevent client code from breaching security here.  Ditto
       for physmem granularity (aka page size) if this is different
       from alignment */
    IMG_DEVMEM_SIZE_T uiSize;
    /*! We call this "contiguity guarantee" to be more precise than
       calling it "alignment" or "page size", terms which may seem
       similar but have different emphasis.  The number reported here
       is the minimum contiguity guarantee from the creator of the
       PMR.  Now, there is no requirement to allocate that coarsely
       from the RA.  The alignment given to the RA simply needs to be
       at least as coarse as the device page size for the heap we
       ultimately intend to map into.  What is important is that the
       device MMU data page size is not greater than the minimum
       contiguity guarantee from the PMR.  This value is reported to
       the client in order that it can choose to make early checks and
       perhaps decide which heap (in a variable page size scenario) it
       would be safe to map this PMR into.  For convenience, the
       client may choose to use this argument as the alignment of the
       virtual range he chooses to allocate, but this is _not_
       necessary and in many cases would be able to get away with a
       finer alignment, should the heap into which this PMR will be
       mapped support it. */
    IMG_DEVMEM_LOG2ALIGN_T uiLog2ContiguityGuarantee;
} DEVMEM_EXPORTCOOKIE;

/* Enum that describes the operation associated with changing sparse memory*/
typedef enum Resize {
	SPARSE_RESIZE_NONE = 0,

	/* This should be set to indicate the change needs allocation */
	SPARSE_RESIZE_ALLOC = 1,

	/* This should be set to indicate the change needs free */
	SPARSE_RESIZE_FREE = 2,

	SPARSE_RESIZE_BOTH = (SPARSE_RESIZE_ALLOC | SPARSE_RESIZE_FREE),

	/* This should be set to silently swap underlying physical memory
	 * without disturbing its device or cpu virtual maps
	 * This flag is not supported in the case of PDUMP and could lead to
	 * PDUMP panic when used */
	SPARSE_REMAP_MEM = 4,

	/* Should be set to get the sparse changes appear in cpu virtual map */
	SPARSE_MAP_CPU_ADDR = 8
}SPARSE_MEM_RESIZE_FLAGS;

/* To use with DevmemSubAllocate() as the default factor if no
 * over-allocation is desired. */
#define DEVMEM_NO_PRE_ALLOCATE_MULTIPLIER 1

#endif /* #ifndef DEVICEMEM_TYPEDEFS_H */