include/uapi/drm/msm_drm.h - linux-imx - Git at Google

 /*
  * Copyright (C) 2013 Red Hat
  * Author: Rob Clark <robdclark@gmail.com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */

 #ifndef __MSM_DRM_H__
 #define __MSM_DRM_H__

 #include "drm.h"

 #if defined(__cplusplus)
 extern "C" {
 #endif

 /* Please note that modifications to all structs defined here are
  * subject to backwards-compatibility constraints:
  *  1) Do not use pointers, use __u64 instead for 32 bit / 64 bit
  *     user/kernel compatibility
  *  2) Keep fields aligned to their size
  *  3) Because of how drm_ioctl() works, we can add new fields at
  *     the end of an ioctl if some care is taken: drm_ioctl() will
  *     zero out the new fields at the tail of the ioctl, so a zero
  *     value should have a backwards compatible meaning.  And for
  *     output params, userspace won't see the newly added output
  *     fields.. so that has to be somehow ok.
  */

 #define MSM_PIPE_NONE        0x00
 #define MSM_PIPE_2D0         0x01
 #define MSM_PIPE_2D1         0x02
 #define MSM_PIPE_3D0         0x10

 /* The pipe-id just uses the lower bits, so can be OR'd with flags in
  * the upper 16 bits (which could be extended further, if needed, maybe
  * we extend/overload the pipe-id some day to deal with multiple rings,
  * but even then I don't think we need the full lower 16 bits).
  */
 #define MSM_PIPE_ID_MASK     0xffff
 #define MSM_PIPE_ID(x)       ((x) & MSM_PIPE_ID_MASK)
 #define MSM_PIPE_FLAGS(x)    ((x) & ~MSM_PIPE_ID_MASK)

 /* timeouts are specified in clock-monotonic absolute times (to simplify
  * restarting interrupted ioctls).  The following struct is logically the
  * same as 'struct timespec' but 32/64b ABI safe.
  */
 struct drm_msm_timespec {
 	__s64 tv_sec;          /* seconds */
 	__s64 tv_nsec;         /* nanoseconds */
 };

 #define MSM_PARAM_GPU_ID     0x01
 #define MSM_PARAM_GMEM_SIZE  0x02
 #define MSM_PARAM_CHIP_ID    0x03
 #define MSM_PARAM_MAX_FREQ   0x04
 #define MSM_PARAM_TIMESTAMP  0x05
 #define MSM_PARAM_GMEM_BASE  0x06

 struct drm_msm_param {
 	__u32 pipe;           /* in, MSM_PIPE_x */
 	__u32 param;          /* in, MSM_PARAM_x */
 	__u64 value;          /* out (get_param) or in (set_param) */
 };

 /*
  * GEM buffers:
  */

 #define MSM_BO_SCANOUT       0x00000001     /* scanout capable */
 #define MSM_BO_GPU_READONLY  0x00000002
 #define MSM_BO_CACHE_MASK    0x000f0000
 /* cache modes */
 #define MSM_BO_CACHED        0x00010000
 #define MSM_BO_WC            0x00020000
 #define MSM_BO_UNCACHED      0x00040000

 #define MSM_BO_FLAGS         (MSM_BO_SCANOUT | \
                               MSM_BO_GPU_READONLY | \
                               MSM_BO_CACHED | \
                               MSM_BO_WC | \
                               MSM_BO_UNCACHED)

 struct drm_msm_gem_new {
 	__u64 size;           /* in */
 	__u32 flags;          /* in, mask of MSM_BO_x */
 	__u32 handle;         /* out */
 };

 #define MSM_INFO_IOVA	0x01

 #define MSM_INFO_FLAGS (MSM_INFO_IOVA)

 struct drm_msm_gem_info {
 	__u32 handle;         /* in */
 	__u32 flags;	      /* in - combination of MSM_INFO_* flags */
 	__u64 offset;         /* out, mmap() offset or iova */
 };

 #define MSM_PREP_READ        0x01
 #define MSM_PREP_WRITE       0x02
 #define MSM_PREP_NOSYNC      0x04

 #define MSM_PREP_FLAGS       (MSM_PREP_READ | MSM_PREP_WRITE | MSM_PREP_NOSYNC)

 struct drm_msm_gem_cpu_prep {
 	__u32 handle;         /* in */
 	__u32 op;             /* in, mask of MSM_PREP_x */
 	struct drm_msm_timespec timeout;   /* in */
 };

 struct drm_msm_gem_cpu_fini {
 	__u32 handle;         /* in */
 };

 /*
  * Cmdstream Submission:
  */

 /* The value written into the cmdstream is logically:
  *
  *   ((relocbuf->gpuaddr + reloc_offset) << shift) | or
  *
  * When we have GPU's w/ >32bit ptrs, it should be possible to deal
  * with this by emit'ing two reloc entries with appropriate shift
  * values.  Or a new MSM_SUBMIT_CMD_x type would also be an option.
  *
  * NOTE that reloc's must be sorted by order of increasing submit_offset,
  * otherwise EINVAL.
  */
 struct drm_msm_gem_submit_reloc {
 	__u32 submit_offset;  /* in, offset from submit_bo */
 	__u32 or;             /* in, value OR'd with result */
 	__s32 shift;          /* in, amount of left shift (can be negative) */
 	__u32 reloc_idx;      /* in, index of reloc_bo buffer */
 	__u64 reloc_offset;   /* in, offset from start of reloc_bo */
 };

 /* submit-types:
  *   BUF - this cmd buffer is executed normally.
  *   IB_TARGET_BUF - this cmd buffer is an IB target.  Reloc's are
  *      processed normally, but the kernel does not setup an IB to
  *      this buffer in the first-level ringbuffer
  *   CTX_RESTORE_BUF - only executed if there has been a GPU context
  *      switch since the last SUBMIT ioctl
  */
 #define MSM_SUBMIT_CMD_BUF             0x0001
 #define MSM_SUBMIT_CMD_IB_TARGET_BUF   0x0002
 #define MSM_SUBMIT_CMD_CTX_RESTORE_BUF 0x0003
 struct drm_msm_gem_submit_cmd {
 	__u32 type;           /* in, one of MSM_SUBMIT_CMD_x */
 	__u32 submit_idx;     /* in, index of submit_bo cmdstream buffer */
 	__u32 submit_offset;  /* in, offset into submit_bo */
 	__u32 size;           /* in, cmdstream size */
 	__u32 pad;
 	__u32 nr_relocs;      /* in, number of submit_reloc's */
 	__u64 relocs;         /* in, ptr to array of submit_reloc's */
 };

 /* Each buffer referenced elsewhere in the cmdstream submit (ie. the
  * cmdstream buffer(s) themselves or reloc entries) has one (and only
  * one) entry in the submit->bos[] table.
  *
  * As a optimization, the current buffer (gpu virtual address) can be
  * passed back through the 'presumed' field.  If on a subsequent reloc,
  * userspace passes back a 'presumed' address that is still valid,
  * then patching the cmdstream for this entry is skipped.  This can
  * avoid kernel needing to map/access the cmdstream bo in the common
  * case.
  */
 #define MSM_SUBMIT_BO_READ             0x0001
 #define MSM_SUBMIT_BO_WRITE            0x0002

 #define MSM_SUBMIT_BO_FLAGS            (MSM_SUBMIT_BO_READ | MSM_SUBMIT_BO_WRITE)

 struct drm_msm_gem_submit_bo {
 	__u32 flags;          /* in, mask of MSM_SUBMIT_BO_x */
 	__u32 handle;         /* in, GEM handle */
 	__u64 presumed;       /* in/out, presumed buffer address */
 };

 /* Valid submit ioctl flags: */
 #define MSM_SUBMIT_NO_IMPLICIT   0x80000000 /* disable implicit sync */
 #define MSM_SUBMIT_FENCE_FD_IN   0x40000000 /* enable input fence_fd */
 #define MSM_SUBMIT_FENCE_FD_OUT  0x20000000 /* enable output fence_fd */
 #define MSM_SUBMIT_FLAGS                ( \
 		MSM_SUBMIT_NO_IMPLICIT   | \
 		MSM_SUBMIT_FENCE_FD_IN   | \
 		MSM_SUBMIT_FENCE_FD_OUT  | \
 		0)

 /* Each cmdstream submit consists of a table of buffers involved, and
  * one or more cmdstream buffers.  This allows for conditional execution
  * (context-restore), and IB buffers needed for per tile/bin draw cmds.
  */
 struct drm_msm_gem_submit {
 	__u32 flags;          /* MSM_PIPE_x | MSM_SUBMIT_x */
 	__u32 fence;          /* out */
 	__u32 nr_bos;         /* in, number of submit_bo's */
 	__u32 nr_cmds;        /* in, number of submit_cmd's */
 	__u64 bos;            /* in, ptr to array of submit_bo's */
 	__u64 cmds;           /* in, ptr to array of submit_cmd's */
 	__s32 fence_fd;       /* in/out fence fd (see MSM_SUBMIT_FENCE_FD_IN/OUT) */
 };

 /* The normal way to synchronize with the GPU is just to CPU_PREP on
  * a buffer if you need to access it from the CPU (other cmdstream
  * submission from same or other contexts, PAGE_FLIP ioctl, etc, all
  * handle the required synchronization under the hood).  This ioctl
  * mainly just exists as a way to implement the gallium pipe_fence
  * APIs without requiring a dummy bo to synchronize on.
  */
 struct drm_msm_wait_fence {
 	__u32 fence;          /* in */
 	__u32 pad;
 	struct drm_msm_timespec timeout;   /* in */
 };

 /* madvise provides a way to tell the kernel in case a buffers contents
  * can be discarded under memory pressure, which is useful for userspace
  * bo cache where we want to optimistically hold on to buffer allocate
  * and potential mmap, but allow the pages to be discarded under memory
  * pressure.
  *
  * Typical usage would involve madvise(DONTNEED) when buffer enters BO
  * cache, and madvise(WILLNEED) if trying to recycle buffer from BO cache.
  * In the WILLNEED case, 'retained' indicates to userspace whether the
  * backing pages still exist.
  */
 #define MSM_MADV_WILLNEED 0       /* backing pages are needed, status returned in 'retained' */
 #define MSM_MADV_DONTNEED 1       /* backing pages not needed */
 #define __MSM_MADV_PURGED 2       /* internal state */

 struct drm_msm_gem_madvise {
 	__u32 handle;         /* in, GEM handle */
 	__u32 madv;           /* in, MSM_MADV_x */
 	__u32 retained;       /* out, whether backing store still exists */
 };

 #define DRM_MSM_GET_PARAM              0x00
 /* placeholder:
 #define DRM_MSM_SET_PARAM              0x01
  */
 #define DRM_MSM_GEM_NEW                0x02
 #define DRM_MSM_GEM_INFO               0x03
 #define DRM_MSM_GEM_CPU_PREP           0x04
 #define DRM_MSM_GEM_CPU_FINI           0x05
 #define DRM_MSM_GEM_SUBMIT             0x06
 #define DRM_MSM_WAIT_FENCE             0x07
 #define DRM_MSM_GEM_MADVISE            0x08

 #define DRM_IOCTL_MSM_GET_PARAM        DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GET_PARAM, struct drm_msm_param)
 #define DRM_IOCTL_MSM_GEM_NEW          DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_NEW, struct drm_msm_gem_new)
 #define DRM_IOCTL_MSM_GEM_INFO         DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_INFO, struct drm_msm_gem_info)
 #define DRM_IOCTL_MSM_GEM_CPU_PREP     DRM_IOW (DRM_COMMAND_BASE + DRM_MSM_GEM_CPU_PREP, struct drm_msm_gem_cpu_prep)
 #define DRM_IOCTL_MSM_GEM_CPU_FINI     DRM_IOW (DRM_COMMAND_BASE + DRM_MSM_GEM_CPU_FINI, struct drm_msm_gem_cpu_fini)
 #define DRM_IOCTL_MSM_GEM_SUBMIT       DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_SUBMIT, struct drm_msm_gem_submit)
 #define DRM_IOCTL_MSM_WAIT_FENCE       DRM_IOW (DRM_COMMAND_BASE + DRM_MSM_WAIT_FENCE, struct drm_msm_wait_fence)
 #define DRM_IOCTL_MSM_GEM_MADVISE      DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_MADVISE, struct drm_msm_gem_madvise)

 #if defined(__cplusplus)
 }
 #endif

 #endif /* __MSM_DRM_H__ */
	/*
	* Copyright (C) 2013 Red Hat
	* Author: Rob Clark <robdclark@gmail.com>
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice (including the next
	* paragraph) shall be included in all copies or substantial portions of the
	* Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	* SOFTWARE.
	*/

	#ifndef __MSM_DRM_H__
	#define __MSM_DRM_H__

	#include "drm.h"

	#if defined(__cplusplus)
	extern "C" {
	#endif

	/* Please note that modifications to all structs defined here are
	* subject to backwards-compatibility constraints:
	* 1) Do not use pointers, use __u64 instead for 32 bit / 64 bit
	* user/kernel compatibility
	* 2) Keep fields aligned to their size
	* 3) Because of how drm_ioctl() works, we can add new fields at
	* the end of an ioctl if some care is taken: drm_ioctl() will
	* zero out the new fields at the tail of the ioctl, so a zero
	* value should have a backwards compatible meaning. And for
	* output params, userspace won't see the newly added output
	* fields.. so that has to be somehow ok.
	*/

	#define MSM_PIPE_NONE 0x00
	#define MSM_PIPE_2D0 0x01
	#define MSM_PIPE_2D1 0x02
	#define MSM_PIPE_3D0 0x10

	/* The pipe-id just uses the lower bits, so can be OR'd with flags in
	* the upper 16 bits (which could be extended further, if needed, maybe
	* we extend/overload the pipe-id some day to deal with multiple rings,
	* but even then I don't think we need the full lower 16 bits).
	*/
	#define MSM_PIPE_ID_MASK 0xffff
	#define MSM_PIPE_ID(x) ((x) & MSM_PIPE_ID_MASK)
	#define MSM_PIPE_FLAGS(x) ((x) & ~MSM_PIPE_ID_MASK)

	/* timeouts are specified in clock-monotonic absolute times (to simplify
	* restarting interrupted ioctls). The following struct is logically the
	* same as 'struct timespec' but 32/64b ABI safe.
	*/
	struct drm_msm_timespec {
	__s64 tv_sec; /* seconds */
	__s64 tv_nsec; /* nanoseconds */
	};

	#define MSM_PARAM_GPU_ID 0x01
	#define MSM_PARAM_GMEM_SIZE 0x02
	#define MSM_PARAM_CHIP_ID 0x03
	#define MSM_PARAM_MAX_FREQ 0x04
	#define MSM_PARAM_TIMESTAMP 0x05
	#define MSM_PARAM_GMEM_BASE 0x06

	struct drm_msm_param {
	__u32 pipe; /* in, MSM_PIPE_x */
	__u32 param; /* in, MSM_PARAM_x */
	__u64 value; /* out (get_param) or in (set_param) */
	};

	/*
	* GEM buffers:
	*/

	#define MSM_BO_SCANOUT 0x00000001 /* scanout capable */
	#define MSM_BO_GPU_READONLY 0x00000002
	#define MSM_BO_CACHE_MASK 0x000f0000
	/* cache modes */
	#define MSM_BO_CACHED 0x00010000
	#define MSM_BO_WC 0x00020000
	#define MSM_BO_UNCACHED 0x00040000

	#define MSM_BO_FLAGS (MSM_BO_SCANOUT \| \
	MSM_BO_GPU_READONLY \| \
	MSM_BO_CACHED \| \
	MSM_BO_WC \| \
	MSM_BO_UNCACHED)

	struct drm_msm_gem_new {
	__u64 size; /* in */
	__u32 flags; /* in, mask of MSM_BO_x */
	__u32 handle; /* out */
	};

	#define MSM_INFO_IOVA 0x01

	#define MSM_INFO_FLAGS (MSM_INFO_IOVA)

	struct drm_msm_gem_info {
	__u32 handle; /* in */
	__u32 flags; /* in - combination of MSM_INFO_* flags */
	__u64 offset; /* out, mmap() offset or iova */
	};

	#define MSM_PREP_READ 0x01
	#define MSM_PREP_WRITE 0x02
	#define MSM_PREP_NOSYNC 0x04

	#define MSM_PREP_FLAGS (MSM_PREP_READ \| MSM_PREP_WRITE \| MSM_PREP_NOSYNC)

	struct drm_msm_gem_cpu_prep {
	__u32 handle; /* in */
	__u32 op; /* in, mask of MSM_PREP_x */
	struct drm_msm_timespec timeout; /* in */
	};

	struct drm_msm_gem_cpu_fini {
	__u32 handle; /* in */
	};

	/*
	* Cmdstream Submission:
	*/

	/* The value written into the cmdstream is logically:
	*
	* ((relocbuf->gpuaddr + reloc_offset) << shift) \| or
	*
	* When we have GPU's w/ >32bit ptrs, it should be possible to deal
	* with this by emit'ing two reloc entries with appropriate shift
	* values. Or a new MSM_SUBMIT_CMD_x type would also be an option.
	*
	* NOTE that reloc's must be sorted by order of increasing submit_offset,
	* otherwise EINVAL.
	*/
	struct drm_msm_gem_submit_reloc {
	__u32 submit_offset; /* in, offset from submit_bo */
	__u32 or; /* in, value OR'd with result */
	__s32 shift; /* in, amount of left shift (can be negative) */
	__u32 reloc_idx; /* in, index of reloc_bo buffer */
	__u64 reloc_offset; /* in, offset from start of reloc_bo */
	};

	/* submit-types:
	* BUF - this cmd buffer is executed normally.
	* IB_TARGET_BUF - this cmd buffer is an IB target. Reloc's are
	* processed normally, but the kernel does not setup an IB to
	* this buffer in the first-level ringbuffer
	* CTX_RESTORE_BUF - only executed if there has been a GPU context
	* switch since the last SUBMIT ioctl
	*/
	#define MSM_SUBMIT_CMD_BUF 0x0001
	#define MSM_SUBMIT_CMD_IB_TARGET_BUF 0x0002
	#define MSM_SUBMIT_CMD_CTX_RESTORE_BUF 0x0003
	struct drm_msm_gem_submit_cmd {
	__u32 type; /* in, one of MSM_SUBMIT_CMD_x */
	__u32 submit_idx; /* in, index of submit_bo cmdstream buffer */
	__u32 submit_offset; /* in, offset into submit_bo */
	__u32 size; /* in, cmdstream size */
	__u32 pad;
	__u32 nr_relocs; /* in, number of submit_reloc's */
	__u64 relocs; /* in, ptr to array of submit_reloc's */
	};

	/* Each buffer referenced elsewhere in the cmdstream submit (ie. the
	* cmdstream buffer(s) themselves or reloc entries) has one (and only
	* one) entry in the submit->bos[] table.
	*
	* As a optimization, the current buffer (gpu virtual address) can be
	* passed back through the 'presumed' field. If on a subsequent reloc,
	* userspace passes back a 'presumed' address that is still valid,
	* then patching the cmdstream for this entry is skipped. This can
	* avoid kernel needing to map/access the cmdstream bo in the common
	* case.
	*/
	#define MSM_SUBMIT_BO_READ 0x0001
	#define MSM_SUBMIT_BO_WRITE 0x0002

	#define MSM_SUBMIT_BO_FLAGS (MSM_SUBMIT_BO_READ \| MSM_SUBMIT_BO_WRITE)

	struct drm_msm_gem_submit_bo {
	__u32 flags; /* in, mask of MSM_SUBMIT_BO_x */
	__u32 handle; /* in, GEM handle */
	__u64 presumed; /* in/out, presumed buffer address */
	};

	/* Valid submit ioctl flags: */
	#define MSM_SUBMIT_NO_IMPLICIT 0x80000000 /* disable implicit sync */
	#define MSM_SUBMIT_FENCE_FD_IN 0x40000000 /* enable input fence_fd */
	#define MSM_SUBMIT_FENCE_FD_OUT 0x20000000 /* enable output fence_fd */
	#define MSM_SUBMIT_FLAGS ( \
	MSM_SUBMIT_NO_IMPLICIT \| \
	MSM_SUBMIT_FENCE_FD_IN \| \
	MSM_SUBMIT_FENCE_FD_OUT \| \
	0)

	/* Each cmdstream submit consists of a table of buffers involved, and
	* one or more cmdstream buffers. This allows for conditional execution
	* (context-restore), and IB buffers needed for per tile/bin draw cmds.
	*/
	struct drm_msm_gem_submit {
	__u32 flags; /* MSM_PIPE_x \| MSM_SUBMIT_x */
	__u32 fence; /* out */
	__u32 nr_bos; /* in, number of submit_bo's */
	__u32 nr_cmds; /* in, number of submit_cmd's */
	__u64 bos; /* in, ptr to array of submit_bo's */
	__u64 cmds; /* in, ptr to array of submit_cmd's */
	__s32 fence_fd; /* in/out fence fd (see MSM_SUBMIT_FENCE_FD_IN/OUT) */
	};

	/* The normal way to synchronize with the GPU is just to CPU_PREP on
	* a buffer if you need to access it from the CPU (other cmdstream
	* submission from same or other contexts, PAGE_FLIP ioctl, etc, all
	* handle the required synchronization under the hood). This ioctl
	* mainly just exists as a way to implement the gallium pipe_fence
	* APIs without requiring a dummy bo to synchronize on.
	*/
	struct drm_msm_wait_fence {
	__u32 fence; /* in */
	__u32 pad;
	struct drm_msm_timespec timeout; /* in */
	};

	/* madvise provides a way to tell the kernel in case a buffers contents
	* can be discarded under memory pressure, which is useful for userspace
	* bo cache where we want to optimistically hold on to buffer allocate
	* and potential mmap, but allow the pages to be discarded under memory
	* pressure.
	*
	* Typical usage would involve madvise(DONTNEED) when buffer enters BO
	* cache, and madvise(WILLNEED) if trying to recycle buffer from BO cache.
	* In the WILLNEED case, 'retained' indicates to userspace whether the
	* backing pages still exist.
	*/
	#define MSM_MADV_WILLNEED 0 /* backing pages are needed, status returned in 'retained' */
	#define MSM_MADV_DONTNEED 1 /* backing pages not needed */
	#define __MSM_MADV_PURGED 2 /* internal state */

	struct drm_msm_gem_madvise {
	__u32 handle; /* in, GEM handle */
	__u32 madv; /* in, MSM_MADV_x */
	__u32 retained; /* out, whether backing store still exists */
	};

	#define DRM_MSM_GET_PARAM 0x00
	/* placeholder:
	#define DRM_MSM_SET_PARAM 0x01
	*/
	#define DRM_MSM_GEM_NEW 0x02
	#define DRM_MSM_GEM_INFO 0x03
	#define DRM_MSM_GEM_CPU_PREP 0x04
	#define DRM_MSM_GEM_CPU_FINI 0x05
	#define DRM_MSM_GEM_SUBMIT 0x06
	#define DRM_MSM_WAIT_FENCE 0x07
	#define DRM_MSM_GEM_MADVISE 0x08

	#define DRM_IOCTL_MSM_GET_PARAM DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GET_PARAM, struct drm_msm_param)
	#define DRM_IOCTL_MSM_GEM_NEW DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_NEW, struct drm_msm_gem_new)
	#define DRM_IOCTL_MSM_GEM_INFO DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_INFO, struct drm_msm_gem_info)
	#define DRM_IOCTL_MSM_GEM_CPU_PREP DRM_IOW (DRM_COMMAND_BASE + DRM_MSM_GEM_CPU_PREP, struct drm_msm_gem_cpu_prep)
	#define DRM_IOCTL_MSM_GEM_CPU_FINI DRM_IOW (DRM_COMMAND_BASE + DRM_MSM_GEM_CPU_FINI, struct drm_msm_gem_cpu_fini)
	#define DRM_IOCTL_MSM_GEM_SUBMIT DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_SUBMIT, struct drm_msm_gem_submit)
	#define DRM_IOCTL_MSM_WAIT_FENCE DRM_IOW (DRM_COMMAND_BASE + DRM_MSM_WAIT_FENCE, struct drm_msm_wait_fence)
	#define DRM_IOCTL_MSM_GEM_MADVISE DRM_IOWR(DRM_COMMAND_BASE + DRM_MSM_GEM_MADVISE, struct drm_msm_gem_madvise)

	#if defined(__cplusplus)
	}
	#endif

	#endif /* __MSM_DRM_H__ */