drm/i915: Extend CONTEXT_CREATE to set parameters upon construction (b9171541) · Commits · 戴 / test

drivers/gpu/drm/i915/i915_drv.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -3111,7 +3111,7 @@ static const struct drm_ioctl_desc i915_ioctls[] = {
		DRM_IOCTL_DEF_DRV(I915_SET_SPRITE_COLORKEY, intel_sprite_set_colorkey_ioctl, DRM_MASTER),
		DRM_IOCTL_DEF_DRV(I915_GET_SPRITE_COLORKEY, drm_noop, DRM_MASTER),
		DRM_IOCTL_DEF_DRV(I915_GEM_WAIT, i915_gem_wait_ioctl, DRM_AUTH\|DRM_RENDER_ALLOW),
		DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_CREATE, i915_gem_context_create_ioctl, DRM_RENDER_ALLOW),
		DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_CREATE_EXT, i915_gem_context_create_ioctl, DRM_RENDER_ALLOW),
		DRM_IOCTL_DEF_DRV(I915_GEM_CONTEXT_DESTROY, i915_gem_context_destroy_ioctl, DRM_RENDER_ALLOW),
		DRM_IOCTL_DEF_DRV(I915_REG_READ, i915_reg_read_ioctl, DRM_RENDER_ALLOW),
		DRM_IOCTL_DEF_DRV(I915_GET_RESET_STATS, i915_gem_context_reset_stats_ioctl, DRM_RENDER_ALLOW),

drivers/gpu/drm/i915/i915_gem_context.c

+250 −202

Original line number	Diff line number	Diff line
		@@ -1102,198 +1102,6 @@ out:
		return err;
		}

		static bool client_is_banned(struct drm_i915_file_private *file_priv)
		{
		return atomic_read(&file_priv->ban_score) >= I915_CLIENT_SCORE_BANNED;
		}

		int i915_gem_context_create_ioctl(struct drm_device dev, void data,
		struct drm_file *file)
		{
		struct drm_i915_private *i915 = to_i915(dev);
		struct drm_i915_gem_context_create *args = data;
		struct drm_i915_file_private *file_priv = file->driver_priv;
		struct i915_gem_context *ctx;
		int ret;

		if (!DRIVER_CAPS(i915)->has_logical_contexts)
		return -ENODEV;

		if (args->pad != 0)
		return -EINVAL;

		ret = i915_terminally_wedged(i915);
		if (ret)
		return ret;

		if (client_is_banned(file_priv)) {
		DRM_DEBUG("client %s[%d] banned from creating ctx\n",
		current->comm,
		pid_nr(get_task_pid(current, PIDTYPE_PID)));

		return -EIO;
		}

		ret = i915_mutex_lock_interruptible(dev);
		if (ret)
		return ret;

		ctx = i915_gem_create_context(i915);
		mutex_unlock(&dev->struct_mutex);
		if (IS_ERR(ctx))
		return PTR_ERR(ctx);

		ret = gem_context_register(ctx, file_priv);
		if (ret < 0)
		goto err_ctx;

		args->ctx_id = ret;
		DRM_DEBUG("HW context %d created\n", args->ctx_id);

		return 0;

		err_ctx:
		mutex_lock(&dev->struct_mutex);
		context_close(ctx);
		mutex_unlock(&dev->struct_mutex);
		return ret;
		}

		int i915_gem_context_destroy_ioctl(struct drm_device dev, void data,
		struct drm_file *file)
		{
		struct drm_i915_gem_context_destroy *args = data;
		struct drm_i915_file_private *file_priv = file->driver_priv;
		struct i915_gem_context *ctx;

		if (args->pad != 0)
		return -EINVAL;

		if (!args->ctx_id)
		return -ENOENT;

		if (mutex_lock_interruptible(&file_priv->context_idr_lock))
		return -EINTR;

		ctx = idr_remove(&file_priv->context_idr, args->ctx_id);
		mutex_unlock(&file_priv->context_idr_lock);
		if (!ctx)
		return -ENOENT;

		mutex_lock(&dev->struct_mutex);
		context_close(ctx);
		mutex_unlock(&dev->struct_mutex);

		return 0;
		}

		static int get_sseu(struct i915_gem_context *ctx,
		struct drm_i915_gem_context_param *args)
		{
		struct drm_i915_gem_context_param_sseu user_sseu;
		struct intel_engine_cs *engine;
		struct intel_context *ce;

		if (args->size == 0)
		goto out;
		else if (args->size < sizeof(user_sseu))
		return -EINVAL;

		if (copy_from_user(&user_sseu, u64_to_user_ptr(args->value),
		sizeof(user_sseu)))
		return -EFAULT;

		if (user_sseu.flags \|\| user_sseu.rsvd)
		return -EINVAL;

		engine = intel_engine_lookup_user(ctx->i915,
		user_sseu.engine_class,
		user_sseu.engine_instance);
		if (!engine)
		return -EINVAL;

		ce = intel_context_pin_lock(ctx, engine); /* serialises with set_sseu */
		if (IS_ERR(ce))
		return PTR_ERR(ce);

		user_sseu.slice_mask = ce->sseu.slice_mask;
		user_sseu.subslice_mask = ce->sseu.subslice_mask;
		user_sseu.min_eus_per_subslice = ce->sseu.min_eus_per_subslice;
		user_sseu.max_eus_per_subslice = ce->sseu.max_eus_per_subslice;

		intel_context_pin_unlock(ce);

		if (copy_to_user(u64_to_user_ptr(args->value), &user_sseu,
		sizeof(user_sseu)))
		return -EFAULT;

		out:
		args->size = sizeof(user_sseu);

		return 0;
		}

		int i915_gem_context_getparam_ioctl(struct drm_device dev, void data,
		struct drm_file *file)
		{
		struct drm_i915_file_private *file_priv = file->driver_priv;
		struct drm_i915_gem_context_param *args = data;
		struct i915_gem_context *ctx;
		int ret = 0;

		ctx = i915_gem_context_lookup(file_priv, args->ctx_id);
		if (!ctx)
		return -ENOENT;

		switch (args->param) {
		case I915_CONTEXT_PARAM_BAN_PERIOD:
		ret = -EINVAL;
		break;
		case I915_CONTEXT_PARAM_NO_ZEROMAP:
		args->size = 0;
		args->value = test_bit(UCONTEXT_NO_ZEROMAP, &ctx->user_flags);
		break;
		case I915_CONTEXT_PARAM_GTT_SIZE:
		args->size = 0;

		if (ctx->ppgtt)
		args->value = ctx->ppgtt->vm.total;
		else if (to_i915(dev)->mm.aliasing_ppgtt)
		args->value = to_i915(dev)->mm.aliasing_ppgtt->vm.total;
		else
		args->value = to_i915(dev)->ggtt.vm.total;
		break;
		case I915_CONTEXT_PARAM_NO_ERROR_CAPTURE:
		args->size = 0;
		args->value = i915_gem_context_no_error_capture(ctx);
		break;
		case I915_CONTEXT_PARAM_BANNABLE:
		args->size = 0;
		args->value = i915_gem_context_is_bannable(ctx);
		break;
		case I915_CONTEXT_PARAM_RECOVERABLE:
		args->size = 0;
		args->value = i915_gem_context_is_recoverable(ctx);
		break;
		case I915_CONTEXT_PARAM_PRIORITY:
		args->size = 0;
		args->value = ctx->sched.priority >> I915_USER_PRIORITY_SHIFT;
		break;
		case I915_CONTEXT_PARAM_SSEU:
		ret = get_sseu(ctx, args);
		break;
		case I915_CONTEXT_PARAM_VM:
		ret = get_ppgtt(ctx, args);
		break;
		default:
		ret = -EINVAL;
		break;
		}

		i915_gem_context_put(ctx);
		return ret;
		}

		static int gen8_emit_rpcs_config(struct i915_request *rq,
		struct intel_context *ce,
		struct intel_sseu sseu)
		@@ -1573,18 +1381,11 @@ static int set_sseu(struct i915_gem_context *ctx,
		return 0;
		}

		int i915_gem_context_setparam_ioctl(struct drm_device dev, void data,
		struct drm_file *file)
		static int ctx_setparam(struct i915_gem_context *ctx,
		struct drm_i915_gem_context_param *args)
		{
		struct drm_i915_file_private *file_priv = file->driver_priv;
		struct drm_i915_gem_context_param *args = data;
		struct i915_gem_context *ctx;
		int ret = 0;

		ctx = i915_gem_context_lookup(file_priv, args->ctx_id);
		if (!ctx)
		return -ENOENT;

		switch (args->param) {
		case I915_CONTEXT_PARAM_NO_ZEROMAP:
		if (args->size)
		@@ -1594,6 +1395,7 @@ int i915_gem_context_setparam_ioctl(struct drm_device dev, void data,
		else
		clear_bit(UCONTEXT_NO_ZEROMAP, &ctx->user_flags);
		break;

		case I915_CONTEXT_PARAM_NO_ERROR_CAPTURE:
		if (args->size)
		ret = -EINVAL;
		@@ -1602,6 +1404,7 @@ int i915_gem_context_setparam_ioctl(struct drm_device dev, void data,
		else
		i915_gem_context_clear_no_error_capture(ctx);
		break;

		case I915_CONTEXT_PARAM_BANNABLE:
		if (args->size)
		ret = -EINVAL;
		@@ -1628,7 +1431,7 @@ int i915_gem_context_setparam_ioctl(struct drm_device dev, void data,

		if (args->size)
		ret = -EINVAL;
		else if (!(to_i915(dev)->caps.scheduler & I915_SCHEDULER_CAP_PRIORITY))
		else if (!(ctx->i915->caps.scheduler & I915_SCHEDULER_CAP_PRIORITY))
		ret = -ENODEV;
		else if (priority > I915_CONTEXT_MAX_USER_PRIORITY \|\|
		priority < I915_CONTEXT_MIN_USER_PRIORITY)
		@@ -1656,6 +1459,251 @@ int i915_gem_context_setparam_ioctl(struct drm_device dev, void data,
		break;
		}

		return ret;
		}

		struct create_ext {
		struct i915_gem_context *ctx;
		struct drm_i915_file_private *fpriv;
		};

		static int create_setparam(struct i915_user_extension __user ext, void data)
		{
		struct drm_i915_gem_context_create_ext_setparam local;
		const struct create_ext *arg = data;

		if (copy_from_user(&local, ext, sizeof(local)))
		return -EFAULT;

		if (local.param.ctx_id)
		return -EINVAL;

		return ctx_setparam(arg->ctx, &local.param);
		}

		static const i915_user_extension_fn create_extensions[] = {
		[I915_CONTEXT_CREATE_EXT_SETPARAM] = create_setparam,
		};

		static bool client_is_banned(struct drm_i915_file_private *file_priv)
		{
		return atomic_read(&file_priv->ban_score) >= I915_CLIENT_SCORE_BANNED;
		}

		int i915_gem_context_create_ioctl(struct drm_device dev, void data,
		struct drm_file *file)
		{
		struct drm_i915_private *i915 = to_i915(dev);
		struct drm_i915_gem_context_create_ext *args = data;
		struct create_ext ext_data;
		int ret;

		if (!DRIVER_CAPS(i915)->has_logical_contexts)
		return -ENODEV;

		if (args->flags & I915_CONTEXT_CREATE_FLAGS_UNKNOWN)
		return -EINVAL;

		ret = i915_terminally_wedged(i915);
		if (ret)
		return ret;

		ext_data.fpriv = file->driver_priv;
		if (client_is_banned(ext_data.fpriv)) {
		DRM_DEBUG("client %s[%d] banned from creating ctx\n",
		current->comm,
		pid_nr(get_task_pid(current, PIDTYPE_PID)));
		return -EIO;
		}

		ret = i915_mutex_lock_interruptible(dev);
		if (ret)
		return ret;

		ext_data.ctx = i915_gem_create_context(i915);
		mutex_unlock(&dev->struct_mutex);
		if (IS_ERR(ext_data.ctx))
		return PTR_ERR(ext_data.ctx);

		if (args->flags & I915_CONTEXT_CREATE_FLAGS_USE_EXTENSIONS) {
		ret = i915_user_extensions(u64_to_user_ptr(args->extensions),
		create_extensions,
		ARRAY_SIZE(create_extensions),
		&ext_data);
		if (ret)
		goto err_ctx;
		}

		ret = gem_context_register(ext_data.ctx, ext_data.fpriv);
		if (ret < 0)
		goto err_ctx;

		args->ctx_id = ret;
		DRM_DEBUG("HW context %d created\n", args->ctx_id);

		return 0;

		err_ctx:
		mutex_lock(&dev->struct_mutex);
		context_close(ext_data.ctx);
		mutex_unlock(&dev->struct_mutex);
		return ret;
		}

		int i915_gem_context_destroy_ioctl(struct drm_device dev, void data,
		struct drm_file *file)
		{
		struct drm_i915_gem_context_destroy *args = data;
		struct drm_i915_file_private *file_priv = file->driver_priv;
		struct i915_gem_context *ctx;

		if (args->pad != 0)
		return -EINVAL;

		if (!args->ctx_id)
		return -ENOENT;

		if (mutex_lock_interruptible(&file_priv->context_idr_lock))
		return -EINTR;

		ctx = idr_remove(&file_priv->context_idr, args->ctx_id);
		mutex_unlock(&file_priv->context_idr_lock);
		if (!ctx)
		return -ENOENT;

		mutex_lock(&dev->struct_mutex);
		context_close(ctx);
		mutex_unlock(&dev->struct_mutex);

		return 0;
		}

		static int get_sseu(struct i915_gem_context *ctx,
		struct drm_i915_gem_context_param *args)
		{
		struct drm_i915_gem_context_param_sseu user_sseu;
		struct intel_engine_cs *engine;
		struct intel_context *ce;

		if (args->size == 0)
		goto out;
		else if (args->size < sizeof(user_sseu))
		return -EINVAL;

		if (copy_from_user(&user_sseu, u64_to_user_ptr(args->value),
		sizeof(user_sseu)))
		return -EFAULT;

		if (user_sseu.flags \|\| user_sseu.rsvd)
		return -EINVAL;

		engine = intel_engine_lookup_user(ctx->i915,
		user_sseu.engine_class,
		user_sseu.engine_instance);
		if (!engine)
		return -EINVAL;

		ce = intel_context_pin_lock(ctx, engine); /* serialises with set_sseu */
		if (IS_ERR(ce))
		return PTR_ERR(ce);

		user_sseu.slice_mask = ce->sseu.slice_mask;
		user_sseu.subslice_mask = ce->sseu.subslice_mask;
		user_sseu.min_eus_per_subslice = ce->sseu.min_eus_per_subslice;
		user_sseu.max_eus_per_subslice = ce->sseu.max_eus_per_subslice;

		intel_context_pin_unlock(ce);

		if (copy_to_user(u64_to_user_ptr(args->value), &user_sseu,
		sizeof(user_sseu)))
		return -EFAULT;

		out:
		args->size = sizeof(user_sseu);

		return 0;
		}

		int i915_gem_context_getparam_ioctl(struct drm_device dev, void data,
		struct drm_file *file)
		{
		struct drm_i915_file_private *file_priv = file->driver_priv;
		struct drm_i915_gem_context_param *args = data;
		struct i915_gem_context *ctx;
		int ret = 0;

		ctx = i915_gem_context_lookup(file_priv, args->ctx_id);
		if (!ctx)
		return -ENOENT;

		switch (args->param) {
		case I915_CONTEXT_PARAM_NO_ZEROMAP:
		args->size = 0;
		args->value = test_bit(UCONTEXT_NO_ZEROMAP, &ctx->user_flags);
		break;

		case I915_CONTEXT_PARAM_GTT_SIZE:
		args->size = 0;
		if (ctx->ppgtt)
		args->value = ctx->ppgtt->vm.total;
		else if (to_i915(dev)->mm.aliasing_ppgtt)
		args->value = to_i915(dev)->mm.aliasing_ppgtt->vm.total;
		else
		args->value = to_i915(dev)->ggtt.vm.total;
		break;

		case I915_CONTEXT_PARAM_NO_ERROR_CAPTURE:
		args->size = 0;
		args->value = i915_gem_context_no_error_capture(ctx);
		break;

		case I915_CONTEXT_PARAM_BANNABLE:
		args->size = 0;
		args->value = i915_gem_context_is_bannable(ctx);
		break;

		case I915_CONTEXT_PARAM_RECOVERABLE:
		args->size = 0;
		args->value = i915_gem_context_is_recoverable(ctx);
		break;

		case I915_CONTEXT_PARAM_PRIORITY:
		args->size = 0;
		args->value = ctx->sched.priority >> I915_USER_PRIORITY_SHIFT;
		break;

		case I915_CONTEXT_PARAM_SSEU:
		ret = get_sseu(ctx, args);
		break;

		case I915_CONTEXT_PARAM_VM:
		ret = get_ppgtt(ctx, args);
		break;

		case I915_CONTEXT_PARAM_BAN_PERIOD:
		default:
		ret = -EINVAL;
		break;
		}

		i915_gem_context_put(ctx);
		return ret;
		}

		int i915_gem_context_setparam_ioctl(struct drm_device dev, void data,
		struct drm_file *file)
		{
		struct drm_i915_file_private *file_priv = file->driver_priv;
		struct drm_i915_gem_context_param *args = data;
		struct i915_gem_context *ctx;
		int ret;

		ctx = i915_gem_context_lookup(file_priv, args->ctx_id);
		if (!ctx)
		return -ENOENT;

		ret = ctx_setparam(ctx, args);

		i915_gem_context_put(ctx);
		return ret;
		}

include/uapi/drm/i915_drm.h

+98 −82

Original line number	Diff line number	Diff line
		@@ -394,6 +394,7 @@ typedef struct _drm_i915_sarea {
		#define DRM_IOCTL_I915_GET_SPRITE_COLORKEY DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GET_SPRITE_COLORKEY, struct drm_intel_sprite_colorkey)
		#define DRM_IOCTL_I915_GEM_WAIT DRM_IOWR(DRM_COMMAND_BASE + DRM_I915_GEM_WAIT, struct drm_i915_gem_wait)
		#define DRM_IOCTL_I915_GEM_CONTEXT_CREATE DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_CONTEXT_CREATE, struct drm_i915_gem_context_create)
		#define DRM_IOCTL_I915_GEM_CONTEXT_CREATE_EXT DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GEM_CONTEXT_CREATE, struct drm_i915_gem_context_create_ext)
		#define DRM_IOCTL_I915_GEM_CONTEXT_DESTROY DRM_IOW (DRM_COMMAND_BASE + DRM_I915_GEM_CONTEXT_DESTROY, struct drm_i915_gem_context_destroy)
		#define DRM_IOCTL_I915_REG_READ DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_REG_READ, struct drm_i915_reg_read)
		#define DRM_IOCTL_I915_GET_RESET_STATS DRM_IOWR (DRM_COMMAND_BASE + DRM_I915_GET_RESET_STATS, struct drm_i915_reset_stats)
		@@ -1447,92 +1448,17 @@ struct drm_i915_gem_wait {
		};

		struct drm_i915_gem_context_create {
		/* output: id of new context*/
		__u32 ctx_id;
		__u32 pad;
		};

		struct drm_i915_gem_context_destroy {
		__u32 ctx_id;
		__u32 pad;
		};

		/*
		* DRM_I915_GEM_VM_CREATE -
		*
		* Create a new virtual memory address space (ppGTT) for use within a context
		* on the same file. Extensions can be provided to configure exactly how the
		* address space is setup upon creation.
		*
		* The id of new VM (bound to the fd) for use with I915_CONTEXT_PARAM_VM is
		* returned in the outparam @vm_id.
		*
		* No flags are defined, with all bits reserved and must be zero.
		*
		* An extension chain maybe provided, starting with @extensions, and terminated
		* by the @next_extension being 0. Currently, no extensions are defined.
		*
		* DRM_I915_GEM_VM_DESTROY -
		*
		* Destroys a previously created VM id, specified in @vm_id.
		*
		* No extensions or flags are allowed currently, and so must be zero.
		*/
		struct drm_i915_gem_vm_control {
		__u64 extensions;
		__u32 flags;
		__u32 vm_id;
		};

		struct drm_i915_reg_read {
		/*
		* Register offset.
		* For 64bit wide registers where the upper 32bits don't immediately
		* follow the lower 32bits, the offset of the lower 32bits must
		* be specified
		*/
		__u64 offset;
		#define I915_REG_READ_8B_WA (1ul << 0)

		__u64 val; /* Return value */
		};
		/* Known registers:
		*
		* Render engine timestamp - 0x2358 + 64bit - gen7+
		* - Note this register returns an invalid value if using the default
		* single instruction 8byte read, in order to workaround that pass
		* flag I915_REG_READ_8B_WA in offset field.
		*
		*/

		struct drm_i915_reset_stats {
		__u32 ctx_id;
		__u32 flags;

		/* All resets since boot/module reload, for all contexts */
		__u32 reset_count;

		/* Number of batches lost when active in GPU, for this context */
		__u32 batch_active;

		/* Number of batches lost pending for execution, for this context */
		__u32 batch_pending;

		__u32 ctx_id; /* output: id of new context*/
		__u32 pad;
		};

		struct drm_i915_gem_userptr {
		__u64 user_ptr;
		__u64 user_size;
		struct drm_i915_gem_context_create_ext {
		__u32 ctx_id; /* output: id of new context*/
		__u32 flags;
		#define I915_USERPTR_READ_ONLY 0x1
		#define I915_USERPTR_UNSYNCHRONIZED 0x80000000
		/**
		* Returned handle for the object.
		*
		* Object handles are nonzero.
		*/
		__u32 handle;
		#define I915_CONTEXT_CREATE_FLAGS_USE_EXTENSIONS (1u << 0)
		#define I915_CONTEXT_CREATE_FLAGS_UNKNOWN \
		(-(I915_CONTEXT_CREATE_FLAGS_USE_EXTENSIONS << 1))
		__u64 extensions;
		};

		struct drm_i915_gem_context_param {
		@@ -1648,6 +1574,96 @@ struct drm_i915_gem_context_param_sseu {
		__u32 rsvd;
		};

		struct drm_i915_gem_context_create_ext_setparam {
		#define I915_CONTEXT_CREATE_EXT_SETPARAM 0
		struct i915_user_extension base;
		struct drm_i915_gem_context_param param;
		};

		struct drm_i915_gem_context_destroy {
		__u32 ctx_id;
		__u32 pad;
		};

		/*
		* DRM_I915_GEM_VM_CREATE -
		*
		* Create a new virtual memory address space (ppGTT) for use within a context
		* on the same file. Extensions can be provided to configure exactly how the
		* address space is setup upon creation.
		*
		* The id of new VM (bound to the fd) for use with I915_CONTEXT_PARAM_VM is
		* returned in the outparam @id.
		*
		* No flags are defined, with all bits reserved and must be zero.
		*
		* An extension chain maybe provided, starting with @extensions, and terminated
		* by the @next_extension being 0. Currently, no extensions are defined.
		*
		* DRM_I915_GEM_VM_DESTROY -
		*
		* Destroys a previously created VM id, specified in @id.
		*
		* No extensions or flags are allowed currently, and so must be zero.
		*/
		struct drm_i915_gem_vm_control {
		__u64 extensions;
		__u32 flags;
		__u32 vm_id;
		};

		struct drm_i915_reg_read {
		/*
		* Register offset.
		* For 64bit wide registers where the upper 32bits don't immediately
		* follow the lower 32bits, the offset of the lower 32bits must
		* be specified
		*/
		__u64 offset;
		#define I915_REG_READ_8B_WA (1ul << 0)

		__u64 val; /* Return value */
		};

		/* Known registers:
		*
		* Render engine timestamp - 0x2358 + 64bit - gen7+
		* - Note this register returns an invalid value if using the default
		* single instruction 8byte read, in order to workaround that pass
		* flag I915_REG_READ_8B_WA in offset field.
		*
		*/

		struct drm_i915_reset_stats {
		__u32 ctx_id;
		__u32 flags;

		/* All resets since boot/module reload, for all contexts */
		__u32 reset_count;

		/* Number of batches lost when active in GPU, for this context */
		__u32 batch_active;

		/* Number of batches lost pending for execution, for this context */
		__u32 batch_pending;

		__u32 pad;
		};

		struct drm_i915_gem_userptr {
		__u64 user_ptr;
		__u64 user_size;
		__u32 flags;
		#define I915_USERPTR_READ_ONLY 0x1
		#define I915_USERPTR_UNSYNCHRONIZED 0x80000000
		/**
		* Returned handle for the object.
		*
		* Object handles are nonzero.
		*/
		__u32 handle;
		};

		enum drm_i915_oa_format {
		I915_OA_FORMAT_A13 = 1, /* HSW only */
		I915_OA_FORMAT_A29, /* HSW only */

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