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

 /*
  * Copyright (C) 2013 Red Hat
  * Author: Rob Clark <robdclark@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 as published by
  * the Free Software Foundation.
  *
  * This program is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  * more details.
  *
  * You should have received a copy of the GNU General Public License along with
  * this program.  If not, see <http://www.gnu.org/licenses/>.
  */

 #ifndef __MSM_DRM_H__
 #define __MSM_DRM_H__

 #include "drm.h"

 /* 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

 /* 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

 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 */
 };

 struct drm_msm_gem_info {
 	__u32 handle;         /* in */
 	__u32 pad;
 	__u64 offset;         /* out, offset to pass to mmap() */
 };

 #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 __user 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 */
 };

 /* 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 pipe;           /* in, MSM_PIPE_x */
 	__u32 fence;          /* out */
 	__u32 nr_bos;         /* in, number of submit_bo's */
 	__u32 nr_cmds;        /* in, number of submit_cmd's */
 	__u64 __user bos;     /* in, ptr to array of submit_bo's */
 	__u64 __user cmds;    /* in, ptr to array of submit_cmd's */
 };

 /* 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 */
 };

 #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_NUM_IOCTLS             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)

 #endif /* __MSM_DRM_H__ */
	/*
	* Copyright (C) 2013 Red Hat
	* Author: Rob Clark <robdclark@gmail.com>
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 as published by
	* the Free Software Foundation.
	*
	* This program is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	* more details.
	*
	* You should have received a copy of the GNU General Public License along with
	* this program. If not, see <http://www.gnu.org/licenses/>.
	*/

	#ifndef __MSM_DRM_H__
	#define __MSM_DRM_H__

	#include "drm.h"

	/* 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

	/* 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

	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 */
	};

	struct drm_msm_gem_info {
	__u32 handle; /* in */
	__u32 pad;
	__u64 offset; /* out, offset to pass to mmap() */
	};

	#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 __user 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 */
	};

	/* 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 pipe; /* in, MSM_PIPE_x */
	__u32 fence; /* out */
	__u32 nr_bos; /* in, number of submit_bo's */
	__u32 nr_cmds; /* in, number of submit_cmd's */
	__u64 __user bos; /* in, ptr to array of submit_bo's */
	__u64 __user cmds; /* in, ptr to array of submit_cmd's */
	};

	/* 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 */
	};

	#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_NUM_IOCTLS 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)

	#endif /* __MSM_DRM_H__ */