Merge tag 'drm-misc-next-2023-07-21' of ssh://git.freedesktop.org/git/drm/drm-misc into drm-next

drm-misc-next for 6.6:

UAPI Changes:
- syncobj: New DRM_IOCTL_SYNCOBJ_EVENTFD ioctl

Cross-subsystem Changes:
- Converge to use of_device_uevent()

Core Changes:
- GPU VA Manager
- improvements to make it clearer that drm_minor_type is uAPI

Driver Changes:
- ssd130x: Improve intermediate buffer size computation
- bridges:
- adv7511: Fix low refresh rate
- anx7625: Switch to macros instead of hardcoded values
- panel:
- ld9040: Backlight support, magic improved

Signed-off-by: Daniel Vetter <[e-mail]>
From: Maxime Ripard <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/urs7omo5xnhglztxgwgsslws7duqfj4jhzrtppaenuvdh2lwuz@4htm4iiqhkep

Documentation/gpu/drm-mm.rst

···
 .. kernel-doc:: drivers/gpu/drm/drm_mm.c
    :export:
 
+DRM GPU VA Manager
+==================
+
+Overview
+--------
+
+.. kernel-doc:: drivers/gpu/drm/drm_gpuva_mgr.c
+   :doc: Overview
+
+Split and Merge
+---------------
+
+.. kernel-doc:: drivers/gpu/drm/drm_gpuva_mgr.c
+   :doc: Split and Merge
+
+Locking
+-------
+
+.. kernel-doc:: drivers/gpu/drm/drm_gpuva_mgr.c
+   :doc: Locking
+
+Examples
+--------
+
+.. kernel-doc:: drivers/gpu/drm/drm_gpuva_mgr.c
+   :doc: Examples
+
+DRM GPU VA Manager Function References
+--------------------------------------
+
+.. kernel-doc:: include/drm/drm_gpuva_mgr.h
+   :internal:
+
+.. kernel-doc:: drivers/gpu/drm/drm_gpuva_mgr.c
+   :export:
+
 DRM Buddy Allocator
 ===================
 

drivers/gpu/drm/Makefile

···
 	drm_vblank.o \
 	drm_vblank_work.o \
 	drm_vma_manager.o \
+	drm_gpuva_mgr.o \
 	drm_writeback.o
 drm-$(CONFIG_DRM_LEGACY) += \
 	drm_agpsupport.o \

drivers/gpu/drm/arm/display/komeda/komeda_dev.c

···
  */
 #include <linux/io.h>
 #include <linux/iommu.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
 #include <linux/of_reserved_mem.h>
 #include <linux/platform_device.h>

drivers/gpu/drm/arm/malidp_drv.c

···
 #include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/of_reserved_mem.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/debugfs.h>
 

drivers/gpu/drm/bridge/adv7511/adv7511_cec.c

···
 
 #include <linux/device.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
 #include <linux/slab.h>
 #include <linux/clk.h>
 

drivers/gpu/drm/bridge/adv7511/adv7511_drv.c

···
 #include <linux/device.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/slab.h>
 
 #include <media/cec.h>
···
 	else
 		low_refresh_rate = ADV7511_LOW_REFRESH_RATE_NONE;
 
-	regmap_update_bits(adv7511->regmap, 0xfb,
-		0x6, low_refresh_rate << 1);
+	if (adv7511->type == ADV7511)
+		regmap_update_bits(adv7511->regmap, 0xfb,
+				   0x6, low_refresh_rate << 1);
+	else
+		regmap_update_bits(adv7511->regmap, 0x4a,
+				   0xc, low_refresh_rate << 2);
+
 	regmap_update_bits(adv7511->regmap, 0x17,
 		0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
 

drivers/gpu/drm/bridge/analogix/anx7625.c

···
 	}
 
 	/* Read downstream capability */
-	ret = anx7625_aux_trans(ctx, DP_AUX_NATIVE_READ, 0x68028, 1, &bcap);
+	ret = anx7625_aux_trans(ctx, DP_AUX_NATIVE_READ, DP_AUX_HDCP_BCAPS, 1, &bcap);
 	if (ret < 0)
 		return ret;
 
-	if (!(bcap & 0x01)) {
+	if (!(bcap & DP_BCAPS_HDCP_CAPABLE)) {
 		pr_warn("downstream not support HDCP 1.4, cap(%x).\n", bcap);
 		return 0;
 	}
···
 
 	dev_dbg(dev, "set downstream sink into normal\n");
 	/* Downstream sink enter into normal mode */
-	data = 1;
-	ret = anx7625_aux_trans(ctx, DP_AUX_NATIVE_WRITE, 0x000600, 1, &data);
+	data = DP_SET_POWER_D0;
+	ret = anx7625_aux_trans(ctx, DP_AUX_NATIVE_WRITE, DP_SET_POWER, 1, &data);
 	if (ret < 0)
 		dev_err(dev, "IO error : set sink into normal mode fail\n");
 
···
 
 	dev_dbg(dev, "notify downstream enter into standby\n");
 	/* Downstream monitor enter into standby mode */
-	data = 2;
-	ret |= anx7625_aux_trans(ctx, DP_AUX_NATIVE_WRITE, 0x000600, 1, &data);
+	data = DP_SET_POWER_D3;
+	ret |= anx7625_aux_trans(ctx, DP_AUX_NATIVE_WRITE, DP_SET_POWER, 1, &data);
 	if (ret < 0)
 		DRM_DEV_ERROR(dev, "IO error : mute video fail\n");
 

drivers/gpu/drm/bridge/cadence/cdns-dsi-core.c

···
 #include <linux/interrupt.h>
 #include <linux/iopoll.h>
 #include <linux/module.h>
-#include <linux/of_address.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>

drivers/gpu/drm/bridge/cadence/cdns-mhdp8546-core.c

···
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/phy/phy.h>
 #include <linux/phy/phy-dp.h>
 #include <linux/platform_device.h>

drivers/gpu/drm/bridge/chipone-icn6211.c

···
 #include <linux/i2c.h>
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 

drivers/gpu/drm/bridge/display-connector.c

···
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 

drivers/gpu/drm/bridge/fsl-ldb.c

···
 #include <linux/mfd/syscon.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>

drivers/gpu/drm/bridge/imx/imx8qm-ldb.c

···
 #include <linux/mfd/syscon.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/phy/phy.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 

drivers/gpu/drm/bridge/imx/imx8qxp-ldb.c

···
 #include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/phy/phy.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 

drivers/gpu/drm/bridge/lontium-lt9211.c

···
 #include <linux/i2c.h>
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>

drivers/gpu/drm/bridge/lvds-codec.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>

drivers/gpu/drm/bridge/nwl-dsi.c

···
 #include <linux/module.h>
 #include <linux/mux/consumer.h>
 #include <linux/of.h>
-#include <linux/of_platform.h>
 #include <linux/phy/phy.h>
+#include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/reset.h>
 #include <linux/sys_soc.h>

drivers/gpu/drm/bridge/parade-ps8622.c

···
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/pm.h>
 #include <linux/regulator/consumer.h>
 

drivers/gpu/drm/bridge/samsung-dsim.c

···
 #include <linux/delay.h>
 #include <linux/irq.h>
 #include <linux/media-bus-format.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/phy/phy.h>
+#include <linux/platform_device.h>
 
 #include <video/mipi_display.h>
 

drivers/gpu/drm/bridge/simple-bridge.c

···
 
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
+#include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 
 #include <drm/drm_atomic_helper.h>

drivers/gpu/drm/bridge/synopsys/dw-hdmi.c

···
 #include <linux/irq.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/regmap.h>
 #include <linux/dma-mapping.h>

drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c

···
 #include <linux/debugfs.h>
 #include <linux/iopoll.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/reset.h>
 

drivers/gpu/drm/bridge/ti-sn65dsi83.c

···
 #include <linux/i2c.h>
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>

drivers/gpu/drm/drm_debugfs.c

···
 #include <drm/drm_file.h>
 #include <drm/drm_gem.h>
 #include <drm/drm_managed.h>
+#include <drm/drm_gpuva_mgr.h>
 
 #include "drm_crtc_internal.h"
 #include "drm_internal.h"
···
 	.release = single_release,
 };
 
+/**
+ * drm_debugfs_gpuva_info - dump the given DRM GPU VA space
+ * @m: pointer to the &seq_file to write
+ * @mgr: the &drm_gpuva_manager representing the GPU VA space
+ *
+ * Dumps the GPU VA mappings of a given DRM GPU VA manager.
+ *
+ * For each DRM GPU VA space drivers should call this function from their
+ * &drm_info_list's show callback.
+ *
+ * Returns: 0 on success, -ENODEV if the &mgr is not initialized
+ */
+int drm_debugfs_gpuva_info(struct seq_file *m,
+			   struct drm_gpuva_manager *mgr)
+{
+	struct drm_gpuva *va, *kva = &mgr->kernel_alloc_node;
+
+	if (!mgr->name)
+		return -ENODEV;
+
+	seq_printf(m, "DRM GPU VA space (%s) [0x%016llx;0x%016llx]\n",
+		   mgr->name, mgr->mm_start, mgr->mm_start + mgr->mm_range);
+	seq_printf(m, "Kernel reserved node [0x%016llx;0x%016llx]\n",
+		   kva->va.addr, kva->va.addr + kva->va.range);
+	seq_puts(m, "\n");
+	seq_puts(m, " VAs | start              | range              | end                | object             | object offset\n");
+	seq_puts(m, "-------------------------------------------------------------------------------------------------------------\n");
+	drm_gpuva_for_each_va(va, mgr) {
+		if (unlikely(va == kva))
+			continue;
+
+		seq_printf(m, "     | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx\n",
+			   va->va.addr, va->va.range, va->va.addr + va->va.range,
+			   (u64)(uintptr_t)va->gem.obj, va->gem.offset);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(drm_debugfs_gpuva_info);
 
 /**
  * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM

drivers/gpu/drm/drm_drv.c

···
  */
 
 static struct drm_minor **drm_minor_get_slot(struct drm_device *dev,
-					     unsigned int type)
+					     enum drm_minor_type type)
 {
 	switch (type) {
 	case DRM_MINOR_PRIMARY:
···
 	}
 }
 
-static int drm_minor_alloc(struct drm_device *dev, unsigned int type)
+static int drm_minor_alloc(struct drm_device *dev, enum drm_minor_type type)
 {
 	struct drm_minor *minor;
 	unsigned long flags;
···
 	return 0;
 }
 
-static int drm_minor_register(struct drm_device *dev, unsigned int type)
+static int drm_minor_register(struct drm_device *dev, enum drm_minor_type type)
 {
 	struct drm_minor *minor;
 	unsigned long flags;
···
 	return ret;
 }
 
-static void drm_minor_unregister(struct drm_device *dev, unsigned int type)
+static void drm_minor_unregister(struct drm_device *dev, enum drm_minor_type type)
 {
 	struct drm_minor *minor;
 	unsigned long flags;

drivers/gpu/drm/drm_gem.c

···
 	if (!obj->resv)
 		obj->resv = &obj->_resv;
 
+	if (drm_core_check_feature(dev, DRIVER_GEM_GPUVA))
+		drm_gem_gpuva_init(obj);
+
 	drm_vma_node_reset(&obj->vma_node);
 	INIT_LIST_HEAD(&obj->lru_node);
 }

drivers/gpu/drm/drm_gpuva_mgr.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022 Red Hat.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ *
+ * Authors:
+ *     Danilo Krummrich <[e-mail]>
+ *
+ */
+
+#include <drm/drm_gpuva_mgr.h>
+
+#include <linux/interval_tree_generic.h>
+#include <linux/mm.h>
+
+/**
+ * DOC: Overview
+ *
+ * The DRM GPU VA Manager, represented by struct drm_gpuva_manager keeps track
+ * of a GPU's virtual address (VA) space and manages the corresponding virtual
+ * mappings represented by &drm_gpuva objects. It also keeps track of the
+ * mapping's backing &drm_gem_object buffers.
+ *
+ * &drm_gem_object buffers maintain a list of &drm_gpuva objects representing
+ * all existent GPU VA mappings using this &drm_gem_object as backing buffer.
+ *
+ * GPU VAs can be flagged as sparse, such that drivers may use GPU VAs to also
+ * keep track of sparse PTEs in order to support Vulkan 'Sparse Resources'.
+ *
+ * The GPU VA manager internally uses a rb-tree to manage the
+ * &drm_gpuva mappings within a GPU's virtual address space.
+ *
+ * The &drm_gpuva_manager contains a special &drm_gpuva representing the
+ * portion of VA space reserved by the kernel. This node is initialized together
+ * with the GPU VA manager instance and removed when the GPU VA manager is
+ * destroyed.
+ *
+ * In a typical application drivers would embed struct drm_gpuva_manager and
+ * struct drm_gpuva within their own driver specific structures, there won't be
+ * any memory allocations of its own nor memory allocations of &drm_gpuva
+ * entries.
+ *
+ * The data structures needed to store &drm_gpuvas within the &drm_gpuva_manager
+ * are contained within struct drm_gpuva already. Hence, for inserting
+ * &drm_gpuva entries from within dma-fence signalling critical sections it is
+ * enough to pre-allocate the &drm_gpuva structures.
+ */
+
+/**
+ * DOC: Split and Merge
+ *
+ * Besides its capability to manage and represent a GPU VA space, the
+ * &drm_gpuva_manager also provides functions to let the &drm_gpuva_manager
+ * calculate a sequence of operations to satisfy a given map or unmap request.
+ *
+ * Therefore the DRM GPU VA manager provides an algorithm implementing splitting
+ * and merging of existent GPU VA mappings with the ones that are requested to
+ * be mapped or unmapped. This feature is required by the Vulkan API to
+ * implement Vulkan 'Sparse Memory Bindings' - drivers UAPIs often refer to this
+ * as VM BIND.
+ *
+ * Drivers can call drm_gpuva_sm_map() to receive a sequence of callbacks
+ * containing map, unmap and remap operations for a given newly requested
+ * mapping. The sequence of callbacks represents the set of operations to
+ * execute in order to integrate the new mapping cleanly into the current state
+ * of the GPU VA space.
+ *
+ * Depending on how the new GPU VA mapping intersects with the existent mappings
+ * of the GPU VA space the &drm_gpuva_fn_ops callbacks contain an arbitrary
+ * amount of unmap operations, a maximum of two remap operations and a single
+ * map operation. The caller might receive no callback at all if no operation is
+ * required, e.g. if the requested mapping already exists in the exact same way.
+ *
+ * The single map operation represents the original map operation requested by
+ * the caller.
+ *
+ * &drm_gpuva_op_unmap contains a 'keep' field, which indicates whether the
+ * &drm_gpuva to unmap is physically contiguous with the original mapping
+ * request. Optionally, if 'keep' is set, drivers may keep the actual page table
+ * entries for this &drm_gpuva, adding the missing page table entries only and
+ * update the &drm_gpuva_manager's view of things accordingly.
+ *
+ * Drivers may do the same optimization, namely delta page table updates, also
+ * for remap operations. This is possible since &drm_gpuva_op_remap consists of
+ * one unmap operation and one or two map operations, such that drivers can
+ * derive the page table update delta accordingly.
+ *
+ * Note that there can't be more than two existent mappings to split up, one at
+ * the beginning and one at the end of the new mapping, hence there is a
+ * maximum of two remap operations.
+ *
+ * Analogous to drm_gpuva_sm_map() drm_gpuva_sm_unmap() uses &drm_gpuva_fn_ops
+ * to call back into the driver in order to unmap a range of GPU VA space. The
+ * logic behind this function is way simpler though: For all existent mappings
+ * enclosed by the given range unmap operations are created. For mappings which
+ * are only partically located within the given range, remap operations are
+ * created such that those mappings are split up and re-mapped partically.
+ *
+ * As an alternative to drm_gpuva_sm_map() and drm_gpuva_sm_unmap(),
+ * drm_gpuva_sm_map_ops_create() and drm_gpuva_sm_unmap_ops_create() can be used
+ * to directly obtain an instance of struct drm_gpuva_ops containing a list of
+ * &drm_gpuva_op, which can be iterated with drm_gpuva_for_each_op(). This list
+ * contains the &drm_gpuva_ops analogous to the callbacks one would receive when
+ * calling drm_gpuva_sm_map() or drm_gpuva_sm_unmap(). While this way requires
+ * more memory (to allocate the &drm_gpuva_ops), it provides drivers a way to
+ * iterate the &drm_gpuva_op multiple times, e.g. once in a context where memory
+ * allocations are possible (e.g. to allocate GPU page tables) and once in the
+ * dma-fence signalling critical path.
+ *
+ * To update the &drm_gpuva_manager's view of the GPU VA space
+ * drm_gpuva_insert() and drm_gpuva_remove() may be used. These functions can
+ * safely be used from &drm_gpuva_fn_ops callbacks originating from
+ * drm_gpuva_sm_map() or drm_gpuva_sm_unmap(). However, it might be more
+ * convenient to use the provided helper functions drm_gpuva_map(),
+ * drm_gpuva_remap() and drm_gpuva_unmap() instead.
+ *
+ * The following diagram depicts the basic relationships of existent GPU VA
+ * mappings, a newly requested mapping and the resulting mappings as implemented
+ * by drm_gpuva_sm_map() - it doesn't cover any arbitrary combinations of these.
+ *
+ * 1) Requested mapping is identical. Replace it, but indicate the backing PTEs
+ *    could be kept.
+ *
+ *    ::
+ *
+ *	     0     a     1
+ *	old: |-----------| (bo_offset=n)
+ *
+ *	     0     a     1
+ *	req: |-----------| (bo_offset=n)
+ *
+ *	     0     a     1
+ *	new: |-----------| (bo_offset=n)
+ *
+ *
+ * 2) Requested mapping is identical, except for the BO offset, hence replace
+ *    the mapping.
+ *
+ *    ::
+ *
+ *	     0     a     1
+ *	old: |-----------| (bo_offset=n)
+ *
+ *	     0     a     1
+ *	req: |-----------| (bo_offset=m)
+ *
+ *	     0     a     1
+ *	new: |-----------| (bo_offset=m)
+ *
+ *
+ * 3) Requested mapping is identical, except for the backing BO, hence replace
+ *    the mapping.
+ *
+ *    ::
+ *
+ *	     0     a     1
+ *	old: |-----------| (bo_offset=n)
+ *
+ *	     0     b     1
+ *	req: |-----------| (bo_offset=n)
+ *
+ *	     0     b     1
+ *	new: |-----------| (bo_offset=n)
+ *
+ *
+ * 4) Existent mapping is a left aligned subset of the requested one, hence
+ *    replace the existent one.
+ *
+ *    ::
+ *
+ *	     0  a  1
+ *	old: |-----|       (bo_offset=n)
+ *
+ *	     0     a     2
+ *	req: |-----------| (bo_offset=n)
+ *
+ *	     0     a     2
+ *	new: |-----------| (bo_offset=n)
+ *
+ *    .. note::
+ *       We expect to see the same result for a request with a different BO
+ *       and/or non-contiguous BO offset.
+ *
+ *
+ * 5) Requested mapping's range is a left aligned subset of the existent one,
+ *    but backed by a different BO. Hence, map the requested mapping and split
+ *    the existent one adjusting its BO offset.
+ *
+ *    ::
+ *
+ *	     0     a     2
+ *	old: |-----------| (bo_offset=n)
+ *
+ *	     0  b  1
+ *	req: |-----|       (bo_offset=n)
+ *
+ *	     0  b  1  a' 2
+ *	new: |-----|-----| (b.bo_offset=n, a.bo_offset=n+1)
+ *
+ *    .. note::
+ *       We expect to see the same result for a request with a different BO
+ *       and/or non-contiguous BO offset.
+ *
+ *
+ * 6) Existent mapping is a superset of the requested mapping. Split it up, but
+ *    indicate that the backing PTEs could be kept.
+ *
+ *    ::
+ *
+ *	     0     a     2
+ *	old: |-----------| (bo_offset=n)
+ *
+ *	     0  a  1
+ *	req: |-----|       (bo_offset=n)
+ *
+ *	     0  a  1  a' 2
+ *	new: |-----|-----| (a.bo_offset=n, a'.bo_offset=n+1)
+ *
+ *
+ * 7) Requested mapping's range is a right aligned subset of the existent one,
+ *    but backed by a different BO. Hence, map the requested mapping and split
+ *    the existent one, without adjusting the BO offset.
+ *
+ *    ::
+ *
+ *	     0     a     2
+ *	old: |-----------| (bo_offset=n)
+ *
+ *	           1  b  2
+ *	req:       |-----| (bo_offset=m)
+ *
+ *	     0  a  1  b  2
+ *	new: |-----|-----| (a.bo_offset=n,b.bo_offset=m)
+ *
+ *
+ * 8) Existent mapping is a superset of the requested mapping. Split it up, but
+ *    indicate that the backing PTEs could be kept.
+ *
+ *    ::
+ *
+ *	      0     a     2
+ *	old: |-----------| (bo_offset=n)
+ *
+ *	           1  a  2
+ *	req:       |-----| (bo_offset=n+1)
+ *
+ *	     0  a' 1  a  2
+ *	new: |-----|-----| (a'.bo_offset=n, a.bo_offset=n+1)
+ *
+ *
+ * 9) Existent mapping is overlapped at the end by the requested mapping backed
+ *    by a different BO. Hence, map the requested mapping and split up the
+ *    existent one, without adjusting the BO offset.
+ *
+ *    ::
+ *
+ *	     0     a     2
+ *	old: |-----------|       (bo_offset=n)
+ *
+ *	           1     b     3
+ *	req:       |-----------| (bo_offset=m)
+ *
+ *	     0  a  1     b     3
+ *	new: |-----|-----------| (a.bo_offset=n,b.bo_offset=m)
+ *
+ *
+ * 10) Existent mapping is overlapped by the requested mapping, both having the
+ *     same backing BO with a contiguous offset. Indicate the backing PTEs of
+ *     the old mapping could be kept.
+ *
+ *     ::
+ *
+ *	      0     a     2
+ *	 old: |-----------|       (bo_offset=n)
+ *
+ *	            1     a     3
+ *	 req:       |-----------| (bo_offset=n+1)
+ *
+ *	      0  a' 1     a     3
+ *	 new: |-----|-----------| (a'.bo_offset=n, a.bo_offset=n+1)
+ *
+ *
+ * 11) Requested mapping's range is a centered subset of the existent one
+ *     having a different backing BO. Hence, map the requested mapping and split
+ *     up the existent one in two mappings, adjusting the BO offset of the right
+ *     one accordingly.
+ *
+ *     ::
+ *
+ *	      0        a        3
+ *	 old: |-----------------| (bo_offset=n)
+ *
+ *	            1  b  2
+ *	 req:       |-----|       (bo_offset=m)
+ *
+ *	      0  a  1  b  2  a' 3
+ *	 new: |-----|-----|-----| (a.bo_offset=n,b.bo_offset=m,a'.bo_offset=n+2)
+ *
+ *
+ * 12) Requested mapping is a contiguous subset of the existent one. Split it
+ *     up, but indicate that the backing PTEs could be kept.
+ *
+ *     ::
+ *
+ *	      0        a        3
+ *	 old: |-----------------| (bo_offset=n)
+ *
+ *	            1  a  2
+ *	 req:       |-----|       (bo_offset=n+1)
+ *
+ *	      0  a' 1  a  2 a'' 3
+ *	 old: |-----|-----|-----| (a'.bo_offset=n, a.bo_offset=n+1, a''.bo_offset=n+2)
+ *
+ *
+ * 13) Existent mapping is a right aligned subset of the requested one, hence
+ *     replace the existent one.
+ *
+ *     ::
+ *
+ *	            1  a  2
+ *	 old:       |-----| (bo_offset=n+1)
+ *
+ *	      0     a     2
+ *	 req: |-----------| (bo_offset=n)
+ *
+ *	      0     a     2
+ *	 new: |-----------| (bo_offset=n)
+ *
+ *     .. note::
+ *        We expect to see the same result for a request with a different bo
+ *        and/or non-contiguous bo_offset.
+ *
+ *
+ * 14) Existent mapping is a centered subset of the requested one, hence
+ *     replace the existent one.
+ *
+ *     ::
+ *
+ *	            1  a  2
+ *	 old:       |-----| (bo_offset=n+1)
+ *
+ *	      0        a       3
+ *	 req: |----------------| (bo_offset=n)
+ *
+ *	      0        a       3
+ *	 new: |----------------| (bo_offset=n)
+ *
+ *     .. note::
+ *        We expect to see the same result for a request with a different bo
+ *        and/or non-contiguous bo_offset.
+ *
+ *
+ * 15) Existent mappings is overlapped at the beginning by the requested mapping
+ *     backed by a different BO. Hence, map the requested mapping and split up
+ *     the existent one, adjusting its BO offset accordingly.
+ *
+ *     ::
+ *
+ *	            1     a     3
+ *	 old:       |-----------| (bo_offset=n)
+ *
+ *	      0     b     2
+ *	 req: |-----------|       (bo_offset=m)
+ *
+ *	      0     b     2  a' 3
+ *	 new: |-----------|-----| (b.bo_offset=m,a.bo_offset=n+2)
+ */
+
+/**
+ * DOC: Locking
+ *
+ * Generally, the GPU VA manager does not take care of locking itself, it is
+ * the drivers responsibility to take care about locking. Drivers might want to
+ * protect the following operations: inserting, removing and iterating
+ * &drm_gpuva objects as well as generating all kinds of operations, such as
+ * split / merge or prefetch.
+ *
+ * The GPU VA manager also does not take care of the locking of the backing
+ * &drm_gem_object buffers GPU VA lists by itself; drivers are responsible to
+ * enforce mutual exclusion using either the GEMs dma_resv lock or alternatively
+ * a driver specific external lock. For the latter see also
+ * drm_gem_gpuva_set_lock().
+ *
+ * However, the GPU VA manager contains lockdep checks to ensure callers of its
+ * API hold the corresponding lock whenever the &drm_gem_objects GPU VA list is
+ * accessed by functions such as drm_gpuva_link() or drm_gpuva_unlink().
+ */
+
+/**
+ * DOC: Examples
+ *
+ * This section gives two examples on how to let the DRM GPUVA Manager generate
+ * &drm_gpuva_op in order to satisfy a given map or unmap request and how to
+ * make use of them.
+ *
+ * The below code is strictly limited to illustrate the generic usage pattern.
+ * To maintain simplicitly, it doesn't make use of any abstractions for common
+ * code, different (asyncronous) stages with fence signalling critical paths,
+ * any other helpers or error handling in terms of freeing memory and dropping
+ * previously taken locks.
+ *
+ * 1) Obtain a list of &drm_gpuva_op to create a new mapping::
+ *
+ *	// Allocates a new &drm_gpuva.
+ *	struct drm_gpuva * driver_gpuva_alloc(void);
+ *
+ *	// Typically drivers would embedd the &drm_gpuva_manager and &drm_gpuva
+ *	// structure in individual driver structures and lock the dma-resv with
+ *	// drm_exec or similar helpers.
+ *	int driver_mapping_create(struct drm_gpuva_manager *mgr,
+ *				  u64 addr, u64 range,
+ *				  struct drm_gem_object *obj, u64 offset)
+ *	{
+ *		struct drm_gpuva_ops *ops;
+ *		struct drm_gpuva_op *op
+ *
+ *		driver_lock_va_space();
+ *		ops = drm_gpuva_sm_map_ops_create(mgr, addr, range,
+ *						  obj, offset);
+ *		if (IS_ERR(ops))
+ *			return PTR_ERR(ops);
+ *
+ *		drm_gpuva_for_each_op(op, ops) {
+ *			struct drm_gpuva *va;
+ *
+ *			switch (op->op) {
+ *			case DRM_GPUVA_OP_MAP:
+ *				va = driver_gpuva_alloc();
+ *				if (!va)
+ *					; // unwind previous VA space updates,
+ *					  // free memory and unlock
+ *
+ *				driver_vm_map();
+ *				drm_gpuva_map(mgr, va, &op->map);
+ *				drm_gpuva_link(va);
+ *
+ *				break;
+ *			case DRM_GPUVA_OP_REMAP: {
+ *				struct drm_gpuva *prev = NULL, *next = NULL;
+ *
+ *				va = op->remap.unmap->va;
+ *
+ *				if (op->remap.prev) {
+ *					prev = driver_gpuva_alloc();
+ *					if (!prev)
+ *						; // unwind previous VA space
+ *						  // updates, free memory and
+ *						  // unlock
+ *				}
+ *
+ *				if (op->remap.next) {
+ *					next = driver_gpuva_alloc();
+ *					if (!next)
+ *						; // unwind previous VA space
+ *						  // updates, free memory and
+ *						  // unlock
+ *				}
+ *
+ *				driver_vm_remap();
+ *				drm_gpuva_remap(prev, next, &op->remap);
+ *
+ *				drm_gpuva_unlink(va);
+ *				if (prev)
+ *					drm_gpuva_link(prev);
+ *				if (next)
+ *					drm_gpuva_link(next);
+ *
+ *				break;
+ *			}
+ *			case DRM_GPUVA_OP_UNMAP:
+ *				va = op->unmap->va;
+ *
+ *				driver_vm_unmap();
+ *				drm_gpuva_unlink(va);
+ *				drm_gpuva_unmap(&op->unmap);
+ *
+ *				break;
+ *			default:
+ *				break;
+ *			}
+ *		}
+ *		driver_unlock_va_space();
+ *
+ *		return 0;
+ *	}
+ *
+ * 2) Receive a callback for each &drm_gpuva_op to create a new mapping::
+ *
+ *	struct driver_context {
+ *		struct drm_gpuva_manager *mgr;
+ *		struct drm_gpuva *new_va;
+ *		struct drm_gpuva *prev_va;
+ *		struct drm_gpuva *next_va;
+ *	};
+ *
+ *	// ops to pass to drm_gpuva_manager_init()
+ *	static const struct drm_gpuva_fn_ops driver_gpuva_ops = {
+ *		.sm_step_map = driver_gpuva_map,
+ *		.sm_step_remap = driver_gpuva_remap,
+ *		.sm_step_unmap = driver_gpuva_unmap,
+ *	};
+ *
+ *	// Typically drivers would embedd the &drm_gpuva_manager and &drm_gpuva
+ *	// structure in individual driver structures and lock the dma-resv with
+ *	// drm_exec or similar helpers.
+ *	int driver_mapping_create(struct drm_gpuva_manager *mgr,
+ *				  u64 addr, u64 range,
+ *				  struct drm_gem_object *obj, u64 offset)
+ *	{
+ *		struct driver_context ctx;
+ *		struct drm_gpuva_ops *ops;
+ *		struct drm_gpuva_op *op;
+ *		int ret = 0;
+ *
+ *		ctx.mgr = mgr;
+ *
+ *		ctx.new_va = kzalloc(sizeof(*ctx.new_va), GFP_KERNEL);
+ *		ctx.prev_va = kzalloc(sizeof(*ctx.prev_va), GFP_KERNEL);
+ *		ctx.next_va = kzalloc(sizeof(*ctx.next_va), GFP_KERNEL);
+ *		if (!ctx.new_va || !ctx.prev_va || !ctx.next_va) {
+ *			ret = -ENOMEM;
+ *			goto out;
+ *		}
+ *
+ *		driver_lock_va_space();
+ *		ret = drm_gpuva_sm_map(mgr, &ctx, addr, range, obj, offset);
+ *		driver_unlock_va_space();
+ *
+ *	out:
+ *		kfree(ctx.new_va);
+ *		kfree(ctx.prev_va);
+ *		kfree(ctx.next_va);
+ *		return ret;
+ *	}
+ *
+ *	int driver_gpuva_map(struct drm_gpuva_op *op, void *__ctx)
+ *	{
+ *		struct driver_context *ctx = __ctx;
+ *
+ *		drm_gpuva_map(ctx->mgr, ctx->new_va, &op->map);
+ *
+ *		drm_gpuva_link(ctx->new_va);
+ *
+ *		// prevent the new GPUVA from being freed in
+ *		// driver_mapping_create()
+ *		ctx->new_va = NULL;
+ *
+ *		return 0;
+ *	}
+ *
+ *	int driver_gpuva_remap(struct drm_gpuva_op *op, void *__ctx)
+ *	{
+ *		struct driver_context *ctx = __ctx;
+ *
+ *		drm_gpuva_remap(ctx->prev_va, ctx->next_va, &op->remap);
+ *
+ *		drm_gpuva_unlink(op->remap.unmap->va);
+ *		kfree(op->remap.unmap->va);
+ *
+ *		if (op->remap.prev) {
+ *			drm_gpuva_link(ctx->prev_va);
+ *			ctx->prev_va = NULL;
+ *		}
+ *
+ *		if (op->remap.next) {
+ *			drm_gpuva_link(ctx->next_va);
+ *			ctx->next_va = NULL;
+ *		}
+ *
+ *		return 0;
+ *	}
+ *
+ *	int driver_gpuva_unmap(struct drm_gpuva_op *op, void *__ctx)
+ *	{
+ *		drm_gpuva_unlink(op->unmap.va);
+ *		drm_gpuva_unmap(&op->unmap);
+ *		kfree(op->unmap.va);
+ *
+ *		return 0;
+ *	}
+ */
+
+#define to_drm_gpuva(__node)	container_of((__node), struct drm_gpuva, rb.node)
+
+#define GPUVA_START(node) ((node)->va.addr)
+#define GPUVA_LAST(node) ((node)->va.addr + (node)->va.range - 1)
+
+/* We do not actually use drm_gpuva_it_next(), tell the compiler to not complain
+ * about this.
+ */
+INTERVAL_TREE_DEFINE(struct drm_gpuva, rb.node, u64, rb.__subtree_last,
+		     GPUVA_START, GPUVA_LAST, static __maybe_unused,
+		     drm_gpuva_it)
+
+static int __drm_gpuva_insert(struct drm_gpuva_manager *mgr,
+			      struct drm_gpuva *va);
+static void __drm_gpuva_remove(struct drm_gpuva *va);
+
+static bool
+drm_gpuva_check_overflow(u64 addr, u64 range)
+{
+	u64 end;
+
+	return WARN(check_add_overflow(addr, range, &end),
+		    "GPUVA address limited to %zu bytes.\n", sizeof(end));
+}
+
+static bool
+drm_gpuva_in_mm_range(struct drm_gpuva_manager *mgr, u64 addr, u64 range)
+{
+	u64 end = addr + range;
+	u64 mm_start = mgr->mm_start;
+	u64 mm_end = mm_start + mgr->mm_range;
+
+	return addr >= mm_start && end <= mm_end;
+}
+
+static bool
+drm_gpuva_in_kernel_node(struct drm_gpuva_manager *mgr, u64 addr, u64 range)
+{
+	u64 end = addr + range;
+	u64 kstart = mgr->kernel_alloc_node.va.addr;
+	u64 krange = mgr->kernel_alloc_node.va.range;
+	u64 kend = kstart + krange;
+
+	return krange && addr < kend && kstart < end;
+}
+
+static bool
+drm_gpuva_range_valid(struct drm_gpuva_manager *mgr,
+		      u64 addr, u64 range)
+{
+	return !drm_gpuva_check_overflow(addr, range) &&
+	       drm_gpuva_in_mm_range(mgr, addr, range) &&
+	       !drm_gpuva_in_kernel_node(mgr, addr, range);
+}
+
+/**
+ * drm_gpuva_manager_init() - initialize a &drm_gpuva_manager
+ * @mgr: pointer to the &drm_gpuva_manager to initialize
+ * @name: the name of the GPU VA space
+ * @start_offset: the start offset of the GPU VA space
+ * @range: the size of the GPU VA space
+ * @reserve_offset: the start of the kernel reserved GPU VA area
+ * @reserve_range: the size of the kernel reserved GPU VA area
+ * @ops: &drm_gpuva_fn_ops called on &drm_gpuva_sm_map / &drm_gpuva_sm_unmap
+ *
+ * The &drm_gpuva_manager must be initialized with this function before use.
+ *
+ * Note that @mgr must be cleared to 0 before calling this function. The given
+ * &name is expected to be managed by the surrounding driver structures.
+ */
+void
+drm_gpuva_manager_init(struct drm_gpuva_manager *mgr,
+		       const char *name,
+		       u64 start_offset, u64 range,
+		       u64 reserve_offset, u64 reserve_range,
+		       const struct drm_gpuva_fn_ops *ops)
+{
+	mgr->rb.tree = RB_ROOT_CACHED;
+	INIT_LIST_HEAD(&mgr->rb.list);
+
+	drm_gpuva_check_overflow(start_offset, range);
+	mgr->mm_start = start_offset;
+	mgr->mm_range = range;
+
+	mgr->name = name ? name : "unknown";
+	mgr->ops = ops;
+
+	memset(&mgr->kernel_alloc_node, 0, sizeof(struct drm_gpuva));
+
+	if (reserve_range) {
+		mgr->kernel_alloc_node.va.addr = reserve_offset;
+		mgr->kernel_alloc_node.va.range = reserve_range;
+
+		if (likely(!drm_gpuva_check_overflow(reserve_offset,
+						     reserve_range)))
+			__drm_gpuva_insert(mgr, &mgr->kernel_alloc_node);
+	}
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_manager_init);
+
+/**
+ * drm_gpuva_manager_destroy() - cleanup a &drm_gpuva_manager
+ * @mgr: pointer to the &drm_gpuva_manager to clean up
+ *
+ * Note that it is a bug to call this function on a manager that still
+ * holds GPU VA mappings.
+ */
+void
+drm_gpuva_manager_destroy(struct drm_gpuva_manager *mgr)
+{
+	mgr->name = NULL;
+
+	if (mgr->kernel_alloc_node.va.range)
+		__drm_gpuva_remove(&mgr->kernel_alloc_node);
+
+	WARN(!RB_EMPTY_ROOT(&mgr->rb.tree.rb_root),
+	     "GPUVA tree is not empty, potentially leaking memory.");
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_manager_destroy);
+
+static int
+__drm_gpuva_insert(struct drm_gpuva_manager *mgr,
+		   struct drm_gpuva *va)
+{
+	struct rb_node *node;
+	struct list_head *head;
+
+	if (drm_gpuva_it_iter_first(&mgr->rb.tree,
+				    GPUVA_START(va),
+				    GPUVA_LAST(va)))
+		return -EEXIST;
+
+	va->mgr = mgr;
+
+	drm_gpuva_it_insert(va, &mgr->rb.tree);
+
+	node = rb_prev(&va->rb.node);
+	if (node)
+		head = &(to_drm_gpuva(node))->rb.entry;
+	else
+		head = &mgr->rb.list;
+
+	list_add(&va->rb.entry, head);
+
+	return 0;
+}
+
+/**
+ * drm_gpuva_insert() - insert a &drm_gpuva
+ * @mgr: the &drm_gpuva_manager to insert the &drm_gpuva in
+ * @va: the &drm_gpuva to insert
+ *
+ * Insert a &drm_gpuva with a given address and range into a
+ * &drm_gpuva_manager.
+ *
+ * It is safe to use this function using the safe versions of iterating the GPU
+ * VA space, such as drm_gpuva_for_each_va_safe() and
+ * drm_gpuva_for_each_va_range_safe().
+ *
+ * Returns: 0 on success, negative error code on failure.
+ */
+int
+drm_gpuva_insert(struct drm_gpuva_manager *mgr,
+		 struct drm_gpuva *va)
+{
+	u64 addr = va->va.addr;
+	u64 range = va->va.range;
+
+	if (unlikely(!drm_gpuva_range_valid(mgr, addr, range)))
+		return -EINVAL;
+
+	return __drm_gpuva_insert(mgr, va);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_insert);
+
+static void
+__drm_gpuva_remove(struct drm_gpuva *va)
+{
+	drm_gpuva_it_remove(va, &va->mgr->rb.tree);
+	list_del_init(&va->rb.entry);
+}
+
+/**
+ * drm_gpuva_remove() - remove a &drm_gpuva
+ * @va: the &drm_gpuva to remove
+ *
+ * This removes the given &va from the underlaying tree.
+ *
+ * It is safe to use this function using the safe versions of iterating the GPU
+ * VA space, such as drm_gpuva_for_each_va_safe() and
+ * drm_gpuva_for_each_va_range_safe().
+ */
+void
+drm_gpuva_remove(struct drm_gpuva *va)
+{
+	struct drm_gpuva_manager *mgr = va->mgr;
+
+	if (unlikely(va == &mgr->kernel_alloc_node)) {
+		WARN(1, "Can't destroy kernel reserved node.\n");
+		return;
+	}
+
+	__drm_gpuva_remove(va);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_remove);
+
+/**
+ * drm_gpuva_link() - link a &drm_gpuva
+ * @va: the &drm_gpuva to link
+ *
+ * This adds the given &va to the GPU VA list of the &drm_gem_object it is
+ * associated with.
+ *
+ * This function expects the caller to protect the GEM's GPUVA list against
+ * concurrent access using the GEMs dma_resv lock.
+ */
+void
+drm_gpuva_link(struct drm_gpuva *va)
+{
+	struct drm_gem_object *obj = va->gem.obj;
+
+	if (unlikely(!obj))
+		return;
+
+	drm_gem_gpuva_assert_lock_held(obj);
+
+	list_add_tail(&va->gem.entry, &obj->gpuva.list);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_link);
+
+/**
+ * drm_gpuva_unlink() - unlink a &drm_gpuva
+ * @va: the &drm_gpuva to unlink
+ *
+ * This removes the given &va from the GPU VA list of the &drm_gem_object it is
+ * associated with.
+ *
+ * This function expects the caller to protect the GEM's GPUVA list against
+ * concurrent access using the GEMs dma_resv lock.
+ */
+void
+drm_gpuva_unlink(struct drm_gpuva *va)
+{
+	struct drm_gem_object *obj = va->gem.obj;
+
+	if (unlikely(!obj))
+		return;
+
+	drm_gem_gpuva_assert_lock_held(obj);
+
+	list_del_init(&va->gem.entry);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_unlink);
+
+/**
+ * drm_gpuva_find_first() - find the first &drm_gpuva in the given range
+ * @mgr: the &drm_gpuva_manager to search in
+ * @addr: the &drm_gpuvas address
+ * @range: the &drm_gpuvas range
+ *
+ * Returns: the first &drm_gpuva within the given range
+ */
+struct drm_gpuva *
+drm_gpuva_find_first(struct drm_gpuva_manager *mgr,
+		     u64 addr, u64 range)
+{
+	u64 last = addr + range - 1;
+
+	return drm_gpuva_it_iter_first(&mgr->rb.tree, addr, last);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_find_first);
+
+/**
+ * drm_gpuva_find() - find a &drm_gpuva
+ * @mgr: the &drm_gpuva_manager to search in
+ * @addr: the &drm_gpuvas address
+ * @range: the &drm_gpuvas range
+ *
+ * Returns: the &drm_gpuva at a given &addr and with a given &range
+ */
+struct drm_gpuva *
+drm_gpuva_find(struct drm_gpuva_manager *mgr,
+	       u64 addr, u64 range)
+{
+	struct drm_gpuva *va;
+
+	va = drm_gpuva_find_first(mgr, addr, range);
+	if (!va)
+		goto out;
+
+	if (va->va.addr != addr ||
+	    va->va.range != range)
+		goto out;
+
+	return va;
+
+out:
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_find);
+
+/**
+ * drm_gpuva_find_prev() - find the &drm_gpuva before the given address
+ * @mgr: the &drm_gpuva_manager to search in
+ * @start: the given GPU VA's start address
+ *
+ * Find the adjacent &drm_gpuva before the GPU VA with given &start address.
+ *
+ * Note that if there is any free space between the GPU VA mappings no mapping
+ * is returned.
+ *
+ * Returns: a pointer to the found &drm_gpuva or NULL if none was found
+ */
+struct drm_gpuva *
+drm_gpuva_find_prev(struct drm_gpuva_manager *mgr, u64 start)
+{
+	if (!drm_gpuva_range_valid(mgr, start - 1, 1))
+		return NULL;
+
+	return drm_gpuva_it_iter_first(&mgr->rb.tree, start - 1, start);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_find_prev);
+
+/**
+ * drm_gpuva_find_next() - find the &drm_gpuva after the given address
+ * @mgr: the &drm_gpuva_manager to search in
+ * @end: the given GPU VA's end address
+ *
+ * Find the adjacent &drm_gpuva after the GPU VA with given &end address.
+ *
+ * Note that if there is any free space between the GPU VA mappings no mapping
+ * is returned.
+ *
+ * Returns: a pointer to the found &drm_gpuva or NULL if none was found
+ */
+struct drm_gpuva *
+drm_gpuva_find_next(struct drm_gpuva_manager *mgr, u64 end)
+{
+	if (!drm_gpuva_range_valid(mgr, end, 1))
+		return NULL;
+
+	return drm_gpuva_it_iter_first(&mgr->rb.tree, end, end + 1);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_find_next);
+
+/**
+ * drm_gpuva_interval_empty() - indicate whether a given interval of the VA space
+ * is empty
+ * @mgr: the &drm_gpuva_manager to check the range for
+ * @addr: the start address of the range
+ * @range: the range of the interval
+ *
+ * Returns: true if the interval is empty, false otherwise
+ */
+bool
+drm_gpuva_interval_empty(struct drm_gpuva_manager *mgr, u64 addr, u64 range)
+{
+	return !drm_gpuva_find_first(mgr, addr, range);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_interval_empty);
+
+/**
+ * drm_gpuva_map() - helper to insert a &drm_gpuva according to a
+ * &drm_gpuva_op_map
+ * @mgr: the &drm_gpuva_manager
+ * @va: the &drm_gpuva to insert
+ * @op: the &drm_gpuva_op_map to initialize @va with
+ *
+ * Initializes the @va from the @op and inserts it into the given @mgr.
+ */
+void
+drm_gpuva_map(struct drm_gpuva_manager *mgr,
+	      struct drm_gpuva *va,
+	      struct drm_gpuva_op_map *op)
+{
+	drm_gpuva_init_from_op(va, op);
+	drm_gpuva_insert(mgr, va);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_map);
+
+/**
+ * drm_gpuva_remap() - helper to remap a &drm_gpuva according to a
+ * &drm_gpuva_op_remap
+ * @prev: the &drm_gpuva to remap when keeping the start of a mapping
+ * @next: the &drm_gpuva to remap when keeping the end of a mapping
+ * @op: the &drm_gpuva_op_remap to initialize @prev and @next with
+ *
+ * Removes the currently mapped &drm_gpuva and remaps it using @prev and/or
+ * @next.
+ */
+void
+drm_gpuva_remap(struct drm_gpuva *prev,
+		struct drm_gpuva *next,
+		struct drm_gpuva_op_remap *op)
+{
+	struct drm_gpuva *curr = op->unmap->va;
+	struct drm_gpuva_manager *mgr = curr->mgr;
+
+	drm_gpuva_remove(curr);
+
+	if (op->prev) {
+		drm_gpuva_init_from_op(prev, op->prev);
+		drm_gpuva_insert(mgr, prev);
+	}
+
+	if (op->next) {
+		drm_gpuva_init_from_op(next, op->next);
+		drm_gpuva_insert(mgr, next);
+	}
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_remap);
+
+/**
+ * drm_gpuva_unmap() - helper to remove a &drm_gpuva according to a
+ * &drm_gpuva_op_unmap
+ * @op: the &drm_gpuva_op_unmap specifying the &drm_gpuva to remove
+ *
+ * Removes the &drm_gpuva associated with the &drm_gpuva_op_unmap.
+ */
+void
+drm_gpuva_unmap(struct drm_gpuva_op_unmap *op)
+{
+	drm_gpuva_remove(op->va);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_unmap);
+
+static int
+op_map_cb(const struct drm_gpuva_fn_ops *fn, void *priv,
+	  u64 addr, u64 range,
+	  struct drm_gem_object *obj, u64 offset)
+{
+	struct drm_gpuva_op op = {};
+
+	op.op = DRM_GPUVA_OP_MAP;
+	op.map.va.addr = addr;
+	op.map.va.range = range;
+	op.map.gem.obj = obj;
+	op.map.gem.offset = offset;
+
+	return fn->sm_step_map(&op, priv);
+}
+
+static int
+op_remap_cb(const struct drm_gpuva_fn_ops *fn, void *priv,
+	    struct drm_gpuva_op_map *prev,
+	    struct drm_gpuva_op_map *next,
+	    struct drm_gpuva_op_unmap *unmap)
+{
+	struct drm_gpuva_op op = {};
+	struct drm_gpuva_op_remap *r;
+
+	op.op = DRM_GPUVA_OP_REMAP;
+	r = &op.remap;
+	r->prev = prev;
+	r->next = next;
+	r->unmap = unmap;
+
+	return fn->sm_step_remap(&op, priv);
+}
+
+static int
+op_unmap_cb(const struct drm_gpuva_fn_ops *fn, void *priv,
+	    struct drm_gpuva *va, bool merge)
+{
+	struct drm_gpuva_op op = {};
+
+	op.op = DRM_GPUVA_OP_UNMAP;
+	op.unmap.va = va;
+	op.unmap.keep = merge;
+
+	return fn->sm_step_unmap(&op, priv);
+}
+
+static int
+__drm_gpuva_sm_map(struct drm_gpuva_manager *mgr,
+		   const struct drm_gpuva_fn_ops *ops, void *priv,
+		   u64 req_addr, u64 req_range,
+		   struct drm_gem_object *req_obj, u64 req_offset)
+{
+	struct drm_gpuva *va, *next, *prev = NULL;
+	u64 req_end = req_addr + req_range;
+	int ret;
+
+	if (unlikely(!drm_gpuva_range_valid(mgr, req_addr, req_range)))
+		return -EINVAL;
+
+	drm_gpuva_for_each_va_range_safe(va, next, mgr, req_addr, req_end) {
+		struct drm_gem_object *obj = va->gem.obj;
+		u64 offset = va->gem.offset;
+		u64 addr = va->va.addr;
+		u64 range = va->va.range;
+		u64 end = addr + range;
+		bool merge = !!va->gem.obj;
+
+		if (addr == req_addr) {
+			merge &= obj == req_obj &&
+				 offset == req_offset;
+
+			if (end == req_end) {
+				ret = op_unmap_cb(ops, priv, va, merge);
+				if (ret)
+					return ret;
+				break;
+			}
+
+			if (end < req_end) {
+				ret = op_unmap_cb(ops, priv, va, merge);
+				if (ret)
+					return ret;
+				goto next;
+			}
+
+			if (end > req_end) {
+				struct drm_gpuva_op_map n = {
+					.va.addr = req_end,
+					.va.range = range - req_range,
+					.gem.obj = obj,
+					.gem.offset = offset + req_range,
+				};
+				struct drm_gpuva_op_unmap u = {
+					.va = va,
+					.keep = merge,
+				};
+
+				ret = op_remap_cb(ops, priv, NULL, &n, &u);
+				if (ret)
+					return ret;
+				break;
+			}
+		} else if (addr < req_addr) {
+			u64 ls_range = req_addr - addr;
+			struct drm_gpuva_op_map p = {
+				.va.addr = addr,
+				.va.range = ls_range,
+				.gem.obj = obj,
+				.gem.offset = offset,
+			};
+			struct drm_gpuva_op_unmap u = { .va = va };
+
+			merge &= obj == req_obj &&
+				 offset + ls_range == req_offset;
+			u.keep = merge;
+
+			if (end == req_end) {
+				ret = op_remap_cb(ops, priv, &p, NULL, &u);
+				if (ret)
+					return ret;
+				break;
+			}
+
+			if (end < req_end) {
+				ret = op_remap_cb(ops, priv, &p, NULL, &u);
+				if (ret)
+					return ret;
+				goto next;
+			}
+
+			if (end > req_end) {
+				struct drm_gpuva_op_map n = {
+					.va.addr = req_end,
+					.va.range = end - req_end,
+					.gem.obj = obj,
+					.gem.offset = offset + ls_range +
+						      req_range,
+				};
+
+				ret = op_remap_cb(ops, priv, &p, &n, &u);
+				if (ret)
+					return ret;
+				break;
+			}
+		} else if (addr > req_addr) {
+			merge &= obj == req_obj &&
+				 offset == req_offset +
+					   (addr - req_addr);
+
+			if (end == req_end) {
+				ret = op_unmap_cb(ops, priv, va, merge);
+				if (ret)
+					return ret;
+				break;
+			}
+
+			if (end < req_end) {
+				ret = op_unmap_cb(ops, priv, va, merge);
+				if (ret)
+					return ret;
+				goto next;
+			}
+
+			if (end > req_end) {
+				struct drm_gpuva_op_map n = {
+					.va.addr = req_end,
+					.va.range = end - req_end,
+					.gem.obj = obj,
+					.gem.offset = offset + req_end - addr,
+				};
+				struct drm_gpuva_op_unmap u = {
+					.va = va,
+					.keep = merge,
+				};
+
+				ret = op_remap_cb(ops, priv, NULL, &n, &u);
+				if (ret)
+					return ret;
+				break;
+			}
+		}
+next:
+		prev = va;
+	}
+
+	return op_map_cb(ops, priv,
+			 req_addr, req_range,
+			 req_obj, req_offset);
+}
+
+static int
+__drm_gpuva_sm_unmap(struct drm_gpuva_manager *mgr,
+		     const struct drm_gpuva_fn_ops *ops, void *priv,
+		     u64 req_addr, u64 req_range)
+{
+	struct drm_gpuva *va, *next;
+	u64 req_end = req_addr + req_range;
+	int ret;
+
+	if (unlikely(!drm_gpuva_range_valid(mgr, req_addr, req_range)))
+		return -EINVAL;
+
+	drm_gpuva_for_each_va_range_safe(va, next, mgr, req_addr, req_end) {
+		struct drm_gpuva_op_map prev = {}, next = {};
+		bool prev_split = false, next_split = false;
+		struct drm_gem_object *obj = va->gem.obj;
+		u64 offset = va->gem.offset;
+		u64 addr = va->va.addr;
+		u64 range = va->va.range;
+		u64 end = addr + range;
+
+		if (addr < req_addr) {
+			prev.va.addr = addr;
+			prev.va.range = req_addr - addr;
+			prev.gem.obj = obj;
+			prev.gem.offset = offset;
+
+			prev_split = true;
+		}
+
+		if (end > req_end) {
+			next.va.addr = req_end;
+			next.va.range = end - req_end;
+			next.gem.obj = obj;
+			next.gem.offset = offset + (req_end - addr);
+
+			next_split = true;
+		}
+
+		if (prev_split || next_split) {
+			struct drm_gpuva_op_unmap unmap = { .va = va };
+
+			ret = op_remap_cb(ops, priv,
+					  prev_split ? &prev : NULL,
+					  next_split ? &next : NULL,
+					  &unmap);
+			if (ret)
+				return ret;
+		} else {
+			ret = op_unmap_cb(ops, priv, va, false);
+			if (ret)
+				return ret;
+		}
+	}
+
+	return 0;
+}
+
+/**
+ * drm_gpuva_sm_map() - creates the &drm_gpuva_op split/merge steps
+ * @mgr: the &drm_gpuva_manager representing the GPU VA space
+ * @req_addr: the start address of the new mapping
+ * @req_range: the range of the new mapping
+ * @req_obj: the &drm_gem_object to map
+ * @req_offset: the offset within the &drm_gem_object
+ * @priv: pointer to a driver private data structure
+ *
+ * This function iterates the given range of the GPU VA space. It utilizes the
+ * &drm_gpuva_fn_ops to call back into the driver providing the split and merge
+ * steps.
+ *
+ * Drivers may use these callbacks to update the GPU VA space right away within
+ * the callback. In case the driver decides to copy and store the operations for
+ * later processing neither this function nor &drm_gpuva_sm_unmap is allowed to
+ * be called before the &drm_gpuva_manager's view of the GPU VA space was
+ * updated with the previous set of operations. To update the
+ * &drm_gpuva_manager's view of the GPU VA space drm_gpuva_insert(),
+ * drm_gpuva_destroy_locked() and/or drm_gpuva_destroy_unlocked() should be
+ * used.
+ *
+ * A sequence of callbacks can contain map, unmap and remap operations, but
+ * the sequence of callbacks might also be empty if no operation is required,
+ * e.g. if the requested mapping already exists in the exact same way.
+ *
+ * There can be an arbitrary amount of unmap operations, a maximum of two remap
+ * operations and a single map operation. The latter one represents the original
+ * map operation requested by the caller.
+ *
+ * Returns: 0 on success or a negative error code
+ */
+int
+drm_gpuva_sm_map(struct drm_gpuva_manager *mgr, void *priv,
+		 u64 req_addr, u64 req_range,
+		 struct drm_gem_object *req_obj, u64 req_offset)
+{
+	const struct drm_gpuva_fn_ops *ops = mgr->ops;
+
+	if (unlikely(!(ops && ops->sm_step_map &&
+		       ops->sm_step_remap &&
+		       ops->sm_step_unmap)))
+		return -EINVAL;
+
+	return __drm_gpuva_sm_map(mgr, ops, priv,
+				  req_addr, req_range,
+				  req_obj, req_offset);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_sm_map);
+
+/**
+ * drm_gpuva_sm_unmap() - creates the &drm_gpuva_ops to split on unmap
+ * @mgr: the &drm_gpuva_manager representing the GPU VA space
+ * @priv: pointer to a driver private data structure
+ * @req_addr: the start address of the range to unmap
+ * @req_range: the range of the mappings to unmap
+ *
+ * This function iterates the given range of the GPU VA space. It utilizes the
+ * &drm_gpuva_fn_ops to call back into the driver providing the operations to
+ * unmap and, if required, split existent mappings.
+ *
+ * Drivers may use these callbacks to update the GPU VA space right away within
+ * the callback. In case the driver decides to copy and store the operations for
+ * later processing neither this function nor &drm_gpuva_sm_map is allowed to be
+ * called before the &drm_gpuva_manager's view of the GPU VA space was updated
+ * with the previous set of operations. To update the &drm_gpuva_manager's view
+ * of the GPU VA space drm_gpuva_insert(), drm_gpuva_destroy_locked() and/or
+ * drm_gpuva_destroy_unlocked() should be used.
+ *
+ * A sequence of callbacks can contain unmap and remap operations, depending on
+ * whether there are actual overlapping mappings to split.
+ *
+ * There can be an arbitrary amount of unmap operations and a maximum of two
+ * remap operations.
+ *
+ * Returns: 0 on success or a negative error code
+ */
+int
+drm_gpuva_sm_unmap(struct drm_gpuva_manager *mgr, void *priv,
+		   u64 req_addr, u64 req_range)
+{
+	const struct drm_gpuva_fn_ops *ops = mgr->ops;
+
+	if (unlikely(!(ops && ops->sm_step_remap &&
+		       ops->sm_step_unmap)))
+		return -EINVAL;
+
+	return __drm_gpuva_sm_unmap(mgr, ops, priv,
+				    req_addr, req_range);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_sm_unmap);
+
+static struct drm_gpuva_op *
+gpuva_op_alloc(struct drm_gpuva_manager *mgr)
+{
+	const struct drm_gpuva_fn_ops *fn = mgr->ops;
+	struct drm_gpuva_op *op;
+
+	if (fn && fn->op_alloc)
+		op = fn->op_alloc();
+	else
+		op = kzalloc(sizeof(*op), GFP_KERNEL);
+
+	if (unlikely(!op))
+		return NULL;
+
+	return op;
+}
+
+static void
+gpuva_op_free(struct drm_gpuva_manager *mgr,
+	      struct drm_gpuva_op *op)
+{
+	const struct drm_gpuva_fn_ops *fn = mgr->ops;
+
+	if (fn && fn->op_free)
+		fn->op_free(op);
+	else
+		kfree(op);
+}
+
+static int
+drm_gpuva_sm_step(struct drm_gpuva_op *__op,
+		  void *priv)
+{
+	struct {
+		struct drm_gpuva_manager *mgr;
+		struct drm_gpuva_ops *ops;
+	} *args = priv;
+	struct drm_gpuva_manager *mgr = args->mgr;
+	struct drm_gpuva_ops *ops = args->ops;
+	struct drm_gpuva_op *op;
+
+	op = gpuva_op_alloc(mgr);
+	if (unlikely(!op))
+		goto err;
+
+	memcpy(op, __op, sizeof(*op));
+
+	if (op->op == DRM_GPUVA_OP_REMAP) {
+		struct drm_gpuva_op_remap *__r = &__op->remap;
+		struct drm_gpuva_op_remap *r = &op->remap;
+
+		r->unmap = kmemdup(__r->unmap, sizeof(*r->unmap),
+				   GFP_KERNEL);
+		if (unlikely(!r->unmap))
+			goto err_free_op;
+
+		if (__r->prev) {
+			r->prev = kmemdup(__r->prev, sizeof(*r->prev),
+					  GFP_KERNEL);
+			if (unlikely(!r->prev))
+				goto err_free_unmap;
+		}
+
+		if (__r->next) {
+			r->next = kmemdup(__r->next, sizeof(*r->next),
+					  GFP_KERNEL);
+			if (unlikely(!r->next))
+				goto err_free_prev;
+		}
+	}
+
+	list_add_tail(&op->entry, &ops->list);
+
+	return 0;
+
+err_free_unmap:
+	kfree(op->remap.unmap);
+err_free_prev:
+	kfree(op->remap.prev);
+err_free_op:
+	gpuva_op_free(mgr, op);
+err:
+	return -ENOMEM;
+}
+
+static const struct drm_gpuva_fn_ops gpuva_list_ops = {
+	.sm_step_map = drm_gpuva_sm_step,
+	.sm_step_remap = drm_gpuva_sm_step,
+	.sm_step_unmap = drm_gpuva_sm_step,
+};
+
+/**
+ * drm_gpuva_sm_map_ops_create() - creates the &drm_gpuva_ops to split and merge
+ * @mgr: the &drm_gpuva_manager representing the GPU VA space
+ * @req_addr: the start address of the new mapping
+ * @req_range: the range of the new mapping
+ * @req_obj: the &drm_gem_object to map
+ * @req_offset: the offset within the &drm_gem_object
+ *
+ * This function creates a list of operations to perform splitting and merging
+ * of existent mapping(s) with the newly requested one.
+ *
+ * The list can be iterated with &drm_gpuva_for_each_op and must be processed
+ * in the given order. It can contain map, unmap and remap operations, but it
+ * also can be empty if no operation is required, e.g. if the requested mapping
+ * already exists is the exact same way.
+ *
+ * There can be an arbitrary amount of unmap operations, a maximum of two remap
+ * operations and a single map operation. The latter one represents the original
+ * map operation requested by the caller.
+ *
+ * Note that before calling this function again with another mapping request it
+ * is necessary to update the &drm_gpuva_manager's view of the GPU VA space. The
+ * previously obtained operations must be either processed or abandoned. To
+ * update the &drm_gpuva_manager's view of the GPU VA space drm_gpuva_insert(),
+ * drm_gpuva_destroy_locked() and/or drm_gpuva_destroy_unlocked() should be
+ * used.
+ *
+ * After the caller finished processing the returned &drm_gpuva_ops, they must
+ * be freed with &drm_gpuva_ops_free.
+ *
+ * Returns: a pointer to the &drm_gpuva_ops on success, an ERR_PTR on failure
+ */
+struct drm_gpuva_ops *
+drm_gpuva_sm_map_ops_create(struct drm_gpuva_manager *mgr,
+			    u64 req_addr, u64 req_range,
+			    struct drm_gem_object *req_obj, u64 req_offset)
+{
+	struct drm_gpuva_ops *ops;
+	struct {
+		struct drm_gpuva_manager *mgr;
+		struct drm_gpuva_ops *ops;
+	} args;
+	int ret;
+
+	ops = kzalloc(sizeof(*ops), GFP_KERNEL);
+	if (unlikely(!ops))
+		return ERR_PTR(-ENOMEM);
+
+	INIT_LIST_HEAD(&ops->list);
+
+	args.mgr = mgr;
+	args.ops = ops;
+
+	ret = __drm_gpuva_sm_map(mgr, &gpuva_list_ops, &args,
+				 req_addr, req_range,
+				 req_obj, req_offset);
+	if (ret)
+		goto err_free_ops;
+
+	return ops;
+
+err_free_ops:
+	drm_gpuva_ops_free(mgr, ops);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_sm_map_ops_create);
+
+/**
+ * drm_gpuva_sm_unmap_ops_create() - creates the &drm_gpuva_ops to split on
+ * unmap
+ * @mgr: the &drm_gpuva_manager representing the GPU VA space
+ * @req_addr: the start address of the range to unmap
+ * @req_range: the range of the mappings to unmap
+ *
+ * This function creates a list of operations to perform unmapping and, if
+ * required, splitting of the mappings overlapping the unmap range.
+ *
+ * The list can be iterated with &drm_gpuva_for_each_op and must be processed
+ * in the given order. It can contain unmap and remap operations, depending on
+ * whether there are actual overlapping mappings to split.
+ *
+ * There can be an arbitrary amount of unmap operations and a maximum of two
+ * remap operations.
+ *
+ * Note that before calling this function again with another range to unmap it
+ * is necessary to update the &drm_gpuva_manager's view of the GPU VA space. The
+ * previously obtained operations must be processed or abandoned. To update the
+ * &drm_gpuva_manager's view of the GPU VA space drm_gpuva_insert(),
+ * drm_gpuva_destroy_locked() and/or drm_gpuva_destroy_unlocked() should be
+ * used.
+ *
+ * After the caller finished processing the returned &drm_gpuva_ops, they must
+ * be freed with &drm_gpuva_ops_free.
+ *
+ * Returns: a pointer to the &drm_gpuva_ops on success, an ERR_PTR on failure
+ */
+struct drm_gpuva_ops *
+drm_gpuva_sm_unmap_ops_create(struct drm_gpuva_manager *mgr,
+			      u64 req_addr, u64 req_range)
+{
+	struct drm_gpuva_ops *ops;
+	struct {
+		struct drm_gpuva_manager *mgr;
+		struct drm_gpuva_ops *ops;
+	} args;
+	int ret;
+
+	ops = kzalloc(sizeof(*ops), GFP_KERNEL);
+	if (unlikely(!ops))
+		return ERR_PTR(-ENOMEM);
+
+	INIT_LIST_HEAD(&ops->list);
+
+	args.mgr = mgr;
+	args.ops = ops;
+
+	ret = __drm_gpuva_sm_unmap(mgr, &gpuva_list_ops, &args,
+				   req_addr, req_range);
+	if (ret)
+		goto err_free_ops;
+
+	return ops;
+
+err_free_ops:
+	drm_gpuva_ops_free(mgr, ops);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_sm_unmap_ops_create);
+
+/**
+ * drm_gpuva_prefetch_ops_create() - creates the &drm_gpuva_ops to prefetch
+ * @mgr: the &drm_gpuva_manager representing the GPU VA space
+ * @addr: the start address of the range to prefetch
+ * @range: the range of the mappings to prefetch
+ *
+ * This function creates a list of operations to perform prefetching.
+ *
+ * The list can be iterated with &drm_gpuva_for_each_op and must be processed
+ * in the given order. It can contain prefetch operations.
+ *
+ * There can be an arbitrary amount of prefetch operations.
+ *
+ * After the caller finished processing the returned &drm_gpuva_ops, they must
+ * be freed with &drm_gpuva_ops_free.
+ *
+ * Returns: a pointer to the &drm_gpuva_ops on success, an ERR_PTR on failure
+ */
+struct drm_gpuva_ops *
+drm_gpuva_prefetch_ops_create(struct drm_gpuva_manager *mgr,
+			      u64 addr, u64 range)
+{
+	struct drm_gpuva_ops *ops;
+	struct drm_gpuva_op *op;
+	struct drm_gpuva *va;
+	u64 end = addr + range;
+	int ret;
+
+	ops = kzalloc(sizeof(*ops), GFP_KERNEL);
+	if (!ops)
+		return ERR_PTR(-ENOMEM);
+
+	INIT_LIST_HEAD(&ops->list);
+
+	drm_gpuva_for_each_va_range(va, mgr, addr, end) {
+		op = gpuva_op_alloc(mgr);
+		if (!op) {
+			ret = -ENOMEM;
+			goto err_free_ops;
+		}
+
+		op->op = DRM_GPUVA_OP_PREFETCH;
+		op->prefetch.va = va;
+		list_add_tail(&op->entry, &ops->list);
+	}
+
+	return ops;
+
+err_free_ops:
+	drm_gpuva_ops_free(mgr, ops);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_prefetch_ops_create);
+
+/**
+ * drm_gpuva_gem_unmap_ops_create() - creates the &drm_gpuva_ops to unmap a GEM
+ * @mgr: the &drm_gpuva_manager representing the GPU VA space
+ * @obj: the &drm_gem_object to unmap
+ *
+ * This function creates a list of operations to perform unmapping for every
+ * GPUVA attached to a GEM.
+ *
+ * The list can be iterated with &drm_gpuva_for_each_op and consists out of an
+ * arbitrary amount of unmap operations.
+ *
+ * After the caller finished processing the returned &drm_gpuva_ops, they must
+ * be freed with &drm_gpuva_ops_free.
+ *
+ * It is the callers responsibility to protect the GEMs GPUVA list against
+ * concurrent access using the GEMs dma_resv lock.
+ *
+ * Returns: a pointer to the &drm_gpuva_ops on success, an ERR_PTR on failure
+ */
+struct drm_gpuva_ops *
+drm_gpuva_gem_unmap_ops_create(struct drm_gpuva_manager *mgr,
+			       struct drm_gem_object *obj)
+{
+	struct drm_gpuva_ops *ops;
+	struct drm_gpuva_op *op;
+	struct drm_gpuva *va;
+	int ret;
+
+	drm_gem_gpuva_assert_lock_held(obj);
+
+	ops = kzalloc(sizeof(*ops), GFP_KERNEL);
+	if (!ops)
+		return ERR_PTR(-ENOMEM);
+
+	INIT_LIST_HEAD(&ops->list);
+
+	drm_gem_for_each_gpuva(va, obj) {
+		op = gpuva_op_alloc(mgr);
+		if (!op) {
+			ret = -ENOMEM;
+			goto err_free_ops;
+		}
+
+		op->op = DRM_GPUVA_OP_UNMAP;
+		op->unmap.va = va;
+		list_add_tail(&op->entry, &ops->list);
+	}
+
+	return ops;
+
+err_free_ops:
+	drm_gpuva_ops_free(mgr, ops);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_gem_unmap_ops_create);
+
+/**
+ * drm_gpuva_ops_free() - free the given &drm_gpuva_ops
+ * @mgr: the &drm_gpuva_manager the ops were created for
+ * @ops: the &drm_gpuva_ops to free
+ *
+ * Frees the given &drm_gpuva_ops structure including all the ops associated
+ * with it.
+ */
+void
+drm_gpuva_ops_free(struct drm_gpuva_manager *mgr,
+		   struct drm_gpuva_ops *ops)
+{
+	struct drm_gpuva_op *op, *next;
+
+	drm_gpuva_for_each_op_safe(op, next, ops) {
+		list_del(&op->entry);
+
+		if (op->op == DRM_GPUVA_OP_REMAP) {
+			kfree(op->remap.prev);
+			kfree(op->remap.next);
+			kfree(op->remap.unmap);
+		}
+
+		gpuva_op_free(mgr, op);
+	}
+
+	kfree(ops);
+}
+EXPORT_SYMBOL_GPL(drm_gpuva_ops_free);

drivers/gpu/drm/drm_internal.h

···
 			   struct drm_file *file_private);
 int drm_syncobj_timeline_wait_ioctl(struct drm_device *dev, void *data,
 				    struct drm_file *file_private);
+int drm_syncobj_eventfd_ioctl(struct drm_device *dev, void *data,
+			      struct drm_file *file_private);
 int drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,
 			    struct drm_file *file_private);
 int drm_syncobj_signal_ioctl(struct drm_device *dev, void *data,

drivers/gpu/drm/drm_ioctl.c

···
 		      DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT, drm_syncobj_timeline_wait_ioctl,
 		      DRM_RENDER_ALLOW),
+	DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_EVENTFD, drm_syncobj_eventfd_ioctl,
+		      DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_RESET, drm_syncobj_reset_ioctl,
 		      DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF(DRM_IOCTL_SYNCOBJ_SIGNAL, drm_syncobj_signal_ioctl,

drivers/gpu/drm/drm_mipi_dsi.c

···
 
 #include <linux/device.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>

drivers/gpu/drm/drm_syncobj.c

···
  * requirement is inherited from the wait-before-signal behavior required by
  * the Vulkan timeline semaphore API.
  *
+ * Alternatively, &DRM_IOCTL_SYNCOBJ_EVENTFD can be used to wait without
+ * blocking: an eventfd will be signaled when the syncobj is. This is useful to
+ * integrate the wait in an event loop.
+ *
  *
  * Import/export of syncobjs
  * -------------------------
···
 
 #include <linux/anon_inodes.h>
 #include <linux/dma-fence-unwrap.h>
+#include <linux/eventfd.h>
 #include <linux/file.h>
 #include <linux/fs.h>
 #include <linux/sched/signal.h>
···
 
 static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj,
 				      struct syncobj_wait_entry *wait);
+
+struct syncobj_eventfd_entry {
+	struct list_head node;
+	struct dma_fence *fence;
+	struct dma_fence_cb fence_cb;
+	struct drm_syncobj *syncobj;
+	struct eventfd_ctx *ev_fd_ctx;
+	u64 point;
+	u32 flags;
+};
+
+static void
+syncobj_eventfd_entry_func(struct drm_syncobj *syncobj,
+			   struct syncobj_eventfd_entry *entry);
 
 /**
  * drm_syncobj_find - lookup and reference a sync object.
···
 	spin_unlock(&syncobj->lock);
 }
 
+static void
+syncobj_eventfd_entry_free(struct syncobj_eventfd_entry *entry)
+{
+	eventfd_ctx_put(entry->ev_fd_ctx);
+	dma_fence_put(entry->fence);
+	/* This happens either inside the syncobj lock, or after the node has
+	 * already been removed from the list.
+	 */
+	list_del(&entry->node);
+	kfree(entry);
+}
+
+static void
+drm_syncobj_add_eventfd(struct drm_syncobj *syncobj,
+			struct syncobj_eventfd_entry *entry)
+{
+	spin_lock(&syncobj->lock);
+	list_add_tail(&entry->node, &syncobj->ev_fd_list);
+	syncobj_eventfd_entry_func(syncobj, entry);
+	spin_unlock(&syncobj->lock);
+}
+
 /**
  * drm_syncobj_add_point - add new timeline point to the syncobj
  * @syncobj: sync object to add timeline point do
···
 			   struct dma_fence *fence,
 			   uint64_t point)
 {
-	struct syncobj_wait_entry *cur, *tmp;
+	struct syncobj_wait_entry *wait_cur, *wait_tmp;
+	struct syncobj_eventfd_entry *ev_fd_cur, *ev_fd_tmp;
 	struct dma_fence *prev;
 
 	dma_fence_get(fence);
···
 	dma_fence_chain_init(chain, prev, fence, point);
 	rcu_assign_pointer(syncobj->fence, &chain->base);
 
-	list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node)
-		syncobj_wait_syncobj_func(syncobj, cur);
+	list_for_each_entry_safe(wait_cur, wait_tmp, &syncobj->cb_list, node)
+		syncobj_wait_syncobj_func(syncobj, wait_cur);
+	list_for_each_entry_safe(ev_fd_cur, ev_fd_tmp, &syncobj->ev_fd_list, node)
+		syncobj_eventfd_entry_func(syncobj, ev_fd_cur);
 	spin_unlock(&syncobj->lock);
 
 	/* Walk the chain once to trigger garbage collection */
···
 			       struct dma_fence *fence)
 {
 	struct dma_fence *old_fence;
-	struct syncobj_wait_entry *cur, *tmp;
+	struct syncobj_wait_entry *wait_cur, *wait_tmp;
+	struct syncobj_eventfd_entry *ev_fd_cur, *ev_fd_tmp;
 
 	if (fence)
 		dma_fence_get(fence);
···
 	rcu_assign_pointer(syncobj->fence, fence);
 
 	if (fence != old_fence) {
-		list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node)
-			syncobj_wait_syncobj_func(syncobj, cur);
+		list_for_each_entry_safe(wait_cur, wait_tmp, &syncobj->cb_list, node)
+			syncobj_wait_syncobj_func(syncobj, wait_cur);
+		list_for_each_entry_safe(ev_fd_cur, ev_fd_tmp, &syncobj->ev_fd_list, node)
+			syncobj_eventfd_entry_func(syncobj, ev_fd_cur);
 	}
 
 	spin_unlock(&syncobj->lock);
···
 	struct drm_syncobj *syncobj = container_of(kref,
 						   struct drm_syncobj,
 						   refcount);
+	struct syncobj_eventfd_entry *ev_fd_cur, *ev_fd_tmp;
+
 	drm_syncobj_replace_fence(syncobj, NULL);
+
+	list_for_each_entry_safe(ev_fd_cur, ev_fd_tmp, &syncobj->ev_fd_list, node)
+		syncobj_eventfd_entry_free(ev_fd_cur);
+
 	kfree(syncobj);
 }
 EXPORT_SYMBOL(drm_syncobj_free);
···
 
 	kref_init(&syncobj->refcount);
 	INIT_LIST_HEAD(&syncobj->cb_list);
+	INIT_LIST_HEAD(&syncobj->ev_fd_list);
 	spin_lock_init(&syncobj->lock);
 
 	if (flags & DRM_SYNCOBJ_CREATE_SIGNALED) {
···
 	return ret;
 }
 
+static void syncobj_eventfd_entry_fence_func(struct dma_fence *fence,
+					     struct dma_fence_cb *cb)
+{
+	struct syncobj_eventfd_entry *entry =
+		container_of(cb, struct syncobj_eventfd_entry, fence_cb);
+
+	eventfd_signal(entry->ev_fd_ctx, 1);
+	syncobj_eventfd_entry_free(entry);
+}
+
+static void
+syncobj_eventfd_entry_func(struct drm_syncobj *syncobj,
+			   struct syncobj_eventfd_entry *entry)
+{
+	int ret;
+	struct dma_fence *fence;
+
+	/* This happens inside the syncobj lock */
+	fence = dma_fence_get(rcu_dereference_protected(syncobj->fence, 1));
+	ret = dma_fence_chain_find_seqno(&fence, entry->point);
+	if (ret != 0 || !fence) {
+		dma_fence_put(fence);
+		return;
+	}
+
+	list_del_init(&entry->node);
+	entry->fence = fence;
+
+	if (entry->flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) {
+		eventfd_signal(entry->ev_fd_ctx, 1);
+		syncobj_eventfd_entry_free(entry);
+	} else {
+		ret = dma_fence_add_callback(fence, &entry->fence_cb,
+					     syncobj_eventfd_entry_fence_func);
+		if (ret == -ENOENT) {
+			eventfd_signal(entry->ev_fd_ctx, 1);
+			syncobj_eventfd_entry_free(entry);
+		}
+	}
+}
+
+int
+drm_syncobj_eventfd_ioctl(struct drm_device *dev, void *data,
+			  struct drm_file *file_private)
+{
+	struct drm_syncobj_eventfd *args = data;
+	struct drm_syncobj *syncobj;
+	struct eventfd_ctx *ev_fd_ctx;
+	struct syncobj_eventfd_entry *entry;
+
+	if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE))
+		return -EOPNOTSUPP;
+
+	if (args->flags & ~DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE)
+		return -EINVAL;
+
+	if (args->pad)
+		return -EINVAL;
+
+	syncobj = drm_syncobj_find(file_private, args->handle);
+	if (!syncobj)
+		return -ENOENT;
+
+	ev_fd_ctx = eventfd_ctx_fdget(args->fd);
+	if (IS_ERR(ev_fd_ctx))
+		return PTR_ERR(ev_fd_ctx);
+
+	entry = kzalloc(sizeof(*entry), GFP_KERNEL);
+	if (!entry) {
+		eventfd_ctx_put(ev_fd_ctx);
+		return -ENOMEM;
+	}
+	entry->syncobj = syncobj;
+	entry->ev_fd_ctx = ev_fd_ctx;
+	entry->point = args->point;
+	entry->flags = args->flags;
+
+	drm_syncobj_add_eventfd(syncobj, entry);
+	drm_syncobj_put(syncobj);
+
+	return 0;
+}
 
 int
 drm_syncobj_reset_ioctl(struct drm_device *dev, void *data,

drivers/gpu/drm/etnaviv/etnaviv_gpu.c

···
 #include <linux/delay.h>
 #include <linux/dma-fence.h>
 #include <linux/dma-mapping.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/regulator/consumer.h>

drivers/gpu/drm/exynos/exynos5433_drm_decon.c

···
 #include <linux/iopoll.h>
 #include <linux/irq.h>
 #include <linux/mfd/syscon.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>

drivers/gpu/drm/exynos/exynos7_drm_decon.c

···
 #include <linux/kernel.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
-#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 

drivers/gpu/drm/exynos/exynos_drm_dsi.c

···
  */
 
 #include <linux/component.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
 
 #include <drm/bridge/samsung-dsim.h>
 #include <drm/drm_probe_helper.h>

drivers/gpu/drm/exynos/exynos_drm_fimd.c

···
 #include <linux/kernel.h>
 #include <linux/mfd/syscon.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>

drivers/gpu/drm/exynos/exynos_drm_rotator.c

···
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/sizes.h>

drivers/gpu/drm/exynos/exynos_drm_scaler.c

···
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 

drivers/gpu/drm/exynos/exynos_hdmi.c

···
 #include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/mfd/syscon.h>
+#include <linux/of.h>
 #include <linux/of_address.h>
-#include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>

drivers/gpu/drm/exynos/exynos_mixer.c

···
 #include <linux/kernel.h>
 #include <linux/ktime.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/regulator/consumer.h>

drivers/gpu/drm/hisilicon/kirin/kirin_drm_drv.c

···
  *	Xinwei Kong <[e-mail]>
  */
 
-#include <linux/of_platform.h>
 #include <linux/component.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
 #include <linux/platform_device.h>
 

drivers/gpu/drm/imx/dcss/dcss-dev.c

···
  */
 
 #include <linux/clk.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
 #include <drm/drm_bridge_connector.h>
···
 
 	dcss->of_port = of_graph_get_port_by_id(dev->of_node, 0);
 	if (!dcss->of_port) {
-		dev_err(dev, "no port@0 node in %s\n", dev->of_node->full_name);
+		dev_err(dev, "no port@0 node in %pOF\n", dev->of_node);
 		ret = -ENODEV;
 		goto clks_err;
 	}

drivers/gpu/drm/imx/lcdc/imx-lcdc.c

···
 #include <linux/bitfield.h>
 #include <linux/clk.h>
 #include <linux/dma-mapping.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
 #include <linux/platform_device.h>
 
 #define IMX21LCDC_LSSAR         0x0000 /* LCDC Screen Start Address Register */

drivers/gpu/drm/ingenic/ingenic-drm-drv.c

···
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_reserved_mem.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>

drivers/gpu/drm/ingenic/ingenic-ipu.c

···
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
+#include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/time.h>
 

drivers/gpu/drm/lima/lima_drv.c

···
 /* Copyright 2017-2019 Qiang Yu <[e-mail]> */
 
 #include <linux/module.h>
-#include <linux/of_platform.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
 #include <linux/uaccess.h>
 #include <linux/slab.h>
 #include <linux/pm_runtime.h>

drivers/gpu/drm/logicvc/logicvc_drm.c

···
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
-#include <linux/of_device.h>
 #include <linux/of_reserved_mem.h>
+#include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/types.h>
 

drivers/gpu/drm/mcde/mcde_drv.c

···
 static struct platform_driver mcde_driver = {
 	.driver = {
 		.name           = "mcde",
-		.of_match_table = of_match_ptr(mcde_of_match),
+		.of_match_table = mcde_of_match,
 	},
 	.probe = mcde_probe,
 	.remove_new = mcde_remove,

drivers/gpu/drm/mediatek/mtk_disp_aal.c

···
 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
-#include <linux/of_irq.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/soc/mediatek/mtk-cmdq.h>
 

drivers/gpu/drm/mediatek/mtk_disp_ccorr.c

···
 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
-#include <linux/of_irq.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/soc/mediatek/mtk-cmdq.h>
 

drivers/gpu/drm/mediatek/mtk_disp_color.c

···
 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
-#include <linux/of_irq.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/soc/mediatek/mtk-cmdq.h>
 

drivers/gpu/drm/mediatek/mtk_disp_gamma.c

···
 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
-#include <linux/of_irq.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/soc/mediatek/mtk-cmdq.h>
 

drivers/gpu/drm/mediatek/mtk_disp_merge.c

···
 
 #include <linux/clk.h>
 #include <linux/component.h>
-#include <linux/of_device.h>
-#include <linux/of_irq.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/reset.h>
 #include <linux/soc/mediatek/mtk-cmdq.h>

drivers/gpu/drm/mediatek/mtk_disp_ovl.c

···
 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
-#include <linux/of_irq.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/soc/mediatek/mtk-cmdq.h>

drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c

···
 #include <drm/drm_of.h>
 #include <linux/clk.h>
 #include <linux/component.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_address.h>
+#include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/reset.h>

drivers/gpu/drm/mediatek/mtk_disp_rdma.c

···
 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
-#include <linux/of_irq.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/soc/mediatek/mtk-cmdq.h>

drivers/gpu/drm/mediatek/mtk_dpi.c

···
 #include <linux/kernel.h>
 #include <linux/media-bus-format.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/platform_device.h>

drivers/gpu/drm/mediatek/mtk_drm_crtc.c

···
 #include <linux/clk.h>
 #include <linux/dma-mapping.h>
 #include <linux/mailbox_controller.h>
+#include <linux/of.h>
 #include <linux/pm_runtime.h>
 #include <linux/soc/mediatek/mtk-cmdq.h>
 #include <linux/soc/mediatek/mtk-mmsys.h>

drivers/gpu/drm/mediatek/mtk_drm_drv.c

···
 #include <linux/component.h>
 #include <linux/iommu.h>
 #include <linux/module.h>
-#include <linux/of_address.h>
+#include <linux/of.h>
 #include <linux/of_platform.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/dma-mapping.h>
 

drivers/gpu/drm/mediatek/mtk_ethdr.c

···
 #include <drm/drm_framebuffer.h>
 #include <linux/clk.h>
 #include <linux/component.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/platform_device.h>
 #include <linux/reset.h>

drivers/gpu/drm/mediatek/mtk_mdp_rdma.c

···
 #include <drm/drm_fourcc.h>
 #include <linux/clk.h>
 #include <linux/component.h>
-#include <linux/of_address.h>
-#include <linux/of_device.h>
+#include <linux/mod_devicetable.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/soc/mediatek/mtk-cmdq.h>

drivers/gpu/drm/meson/meson_drv.h

···
 
 #include <linux/device.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/regmap.h>
 
 struct drm_crtc;

drivers/gpu/drm/meson/meson_dw_hdmi.c

···
 #include <linux/component.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
+#include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/reset.h>
 

drivers/gpu/drm/meson/meson_dw_mipi_dsi.c

···
 
 #include <linux/clk.h>
 #include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
 #include <linux/of_graph.h>
+#include <linux/platform_device.h>
 #include <linux/reset.h>
 #include <linux/phy/phy.h>
 #include <linux/bitfield.h>

drivers/gpu/drm/meson/meson_encoder_dsi.c

···
 
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
 #include <linux/of_graph.h>
 
 #include <drm/drm_atomic_helper.h>

drivers/gpu/drm/meson/meson_encoder_hdmi.c

···
 #include <linux/component.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/reset.h>
 

drivers/gpu/drm/msm/adreno/a6xx_gmu.c

···
 
 #include <linux/clk.h>
 #include <linux/interconnect.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
 #include <linux/pm_domain.h>
 #include <linux/pm_opp.h>
 #include <soc/qcom/cmd-db.h>

drivers/gpu/drm/msm/dp/dp_audio.c

···
 
 #define pr_fmt(fmt)	"[drm-dp] %s: " fmt, __func__
 
-#include <linux/of_platform.h>
+#include <linux/platform_device.h>
 
 #include <drm/display/drm_dp_helper.h>
 #include <drm/drm_edid.h>

drivers/gpu/drm/msm/dsi/dsi_host.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/interrupt.h>
 #include <linux/mfd/syscon.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
 #include <linux/of_irq.h>
 #include <linux/pinctrl/consumer.h>

drivers/gpu/drm/msm/hdmi/hdmi.c

···
 
 #include <linux/of_irq.h>
 #include <linux/of_gpio.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
 
 #include <drm/drm_bridge_connector.h>
 #include <drm/drm_of.h>

drivers/gpu/drm/msm/hdmi/hdmi_phy.c

···
  * Copyright (c) 2016, The Linux Foundation. All rights reserved.
  */
 
-#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
 
 #include "hdmi.h"
 

drivers/gpu/drm/msm/msm_mdss.c

···
 #include <linux/irqchip.h>
 #include <linux/irqdesc.h>
 #include <linux/irqchip/chained_irq.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/reset.h>
 

drivers/gpu/drm/mxsfb/lcdif_drv.c

···
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>

drivers/gpu/drm/panel/panel-abt-y030xx067a.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>

drivers/gpu/drm/panel/panel-auo-a030jtn01.c

···
 #include <linux/device.h>
 #include <linux/gpio/consumer.h>
 #include <linux/media-bus-format.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>

drivers/gpu/drm/panel/panel-boe-himax8279d.c

···
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 
 #include <linux/gpio/consumer.h>
 #include <linux/regulator/consumer.h>

drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/regulator/consumer.h>
 
 #include <drm/drm_connector.h>

drivers/gpu/drm/panel/panel-dsi-cm.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/jiffies.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/regulator/consumer.h>
 
 #include <drm/drm_connector.h>

drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c

···
 #include <linux/delay.h>
 #include <linux/mod_devicetable.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
 #include <linux/regulator/consumer.h>
 
 #include <drm/drm_mipi_dsi.h>

drivers/gpu/drm/panel/panel-feiyang-fy07024di26a30d.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/delay.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/mod_devicetable.h>
 #include <linux/regulator/consumer.h>
 
 #define FEIYANG_INIT_CMD_LEN	2

drivers/gpu/drm/panel/panel-himax-hx8394.c

···
 #include <linux/media-bus-format.h>
 #include <linux/mod_devicetable.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/regulator/consumer.h>
 
 #include <video/mipi_display.h>

drivers/gpu/drm/panel/panel-ilitek-ili9322.c

···
 #include <linux/bitops.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>

drivers/gpu/drm/panel/panel-ilitek-ili9341.c

···
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>
 

drivers/gpu/drm/panel/panel-ilitek-ili9881c.c

···
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 
 #include <linux/gpio/consumer.h>
 #include <linux/regulator/consumer.h>

drivers/gpu/drm/panel/panel-innolux-ej030na.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>

drivers/gpu/drm/panel/panel-innolux-p079zca.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/regulator/consumer.h>
 
 #include <video/mipi_display.h>

drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/delay.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/regulator/consumer.h>
 
 #define JD9365DA_INIT_CMD_LEN		2

drivers/gpu/drm/panel/panel-leadtek-ltk050h3146w.c

···
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/regulator/consumer.h>
 
 #include <video/display_timing.h>

drivers/gpu/drm/panel/panel-lvds.c

···
 
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
-#include <linux/of_platform.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>

drivers/gpu/drm/panel/panel-magnachip-d53e6ea8966.c

···
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>
 

drivers/gpu/drm/panel/panel-mantix-mlaf057we51.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/regulator/consumer.h>
 
 #include <video/mipi_display.h>

drivers/gpu/drm/panel/panel-newvision-nv3051d.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/regulator/consumer.h>
 
 #include <video/display_timing.h>

drivers/gpu/drm/panel/panel-newvision-nv3052c.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>
 #include <video/mipi_display.h>

drivers/gpu/drm/panel/panel-novatek-nt35510.c

···
 #include <linux/bitops.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 

drivers/gpu/drm/panel/panel-novatek-nt35560.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/regulator/consumer.h>
 
 #include <video/mipi_display.h>

drivers/gpu/drm/panel/panel-novatek-nt35950.c

···
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
 #include <linux/regulator/consumer.h>
 

drivers/gpu/drm/panel/panel-novatek-nt36523.c

···
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
 #include <linux/regulator/consumer.h>
 

drivers/gpu/drm/panel/panel-novatek-nt36672a.c

···
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 
 #include <linux/gpio/consumer.h>
 #include <linux/pinctrl/consumer.h>

drivers/gpu/drm/panel/panel-novatek-nt39016.c

···
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>

drivers/gpu/drm/panel/panel-orisetech-ota5601a.c

···
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>

drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c

···
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/pm.h>
 

drivers/gpu/drm/panel/panel-samsung-ld9040.c

···
  * Andrzej Hajda <[e-mail]>
 */
 
+#include <linux/backlight.h>
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
···
 {
 	ld9040_dcs_write_seq_static(ctx, MCS_USER_SETTING, 0x5a, 0x5a);
 	ld9040_dcs_write_seq_static(ctx, MCS_PANEL_CONDITION,
-		0x05, 0x65, 0x96, 0x71, 0x7d, 0x19, 0x3b, 0x0d,
-		0x19, 0x7e, 0x0d, 0xe2, 0x00, 0x00, 0x7e, 0x7d,
-		0x07, 0x07, 0x20, 0x20, 0x20, 0x02, 0x02);
+		0x05, 0x5e, 0x96, 0x6b, 0x7d, 0x0d, 0x3f, 0x00,
+		0x00, 0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x07, 0x05, 0x1f, 0x1f, 0x1f, 0x00, 0x00);
 	ld9040_dcs_write_seq_static(ctx, MCS_DISPCTL,
-		0x02, 0x08, 0x08, 0x10, 0x10);
+		0x02, 0x06, 0x0a, 0x10, 0x10);
 	ld9040_dcs_write_seq_static(ctx, MCS_MANPWR, 0x04);
 	ld9040_dcs_write_seq_static(ctx, MCS_POWER_CTRL,
 		0x0a, 0x87, 0x25, 0x6a, 0x44, 0x02, 0x88);
-	ld9040_dcs_write_seq_static(ctx, MCS_ELVSS_ON, 0x0d, 0x00, 0x16);
+	ld9040_dcs_write_seq_static(ctx, MCS_ELVSS_ON, 0x0f, 0x00, 0x16);
 	ld9040_dcs_write_seq_static(ctx, MCS_GTCON, 0x09, 0x00, 0x00);
 	ld9040_brightness_set(ctx);
 	ld9040_dcs_write_seq_static(ctx, MIPI_DCS_EXIT_SLEEP_MODE);
···
 	return 0;
 }
 
+static int ld9040_bl_update_status(struct backlight_device *dev)
+{
+	struct ld9040 *ctx = bl_get_data(dev);
+
+	ctx->brightness = backlight_get_brightness(dev);
+	ld9040_brightness_set(ctx);
+
+	return 0;
+}
+
+static const struct backlight_ops ld9040_bl_ops = {
+	.update_status  = ld9040_bl_update_status,
+};
+
+static const struct backlight_properties ld9040_bl_props = {
+	.type = BACKLIGHT_RAW,
+	.scale = BACKLIGHT_SCALE_NON_LINEAR,
+	.max_brightness = ARRAY_SIZE(ld9040_gammas) - 1,
+	.brightness = ARRAY_SIZE(ld9040_gammas) - 1,
+};
+
 static int ld9040_probe(struct spi_device *spi)
 {
+	struct backlight_device *bldev;
 	struct device *dev = &spi->dev;
 	struct ld9040 *ctx;
 	int ret;
···
 	spi_set_drvdata(spi, ctx);
 
 	ctx->dev = dev;
-	ctx->brightness = ARRAY_SIZE(ld9040_gammas) - 1;
+	ctx->brightness = ld9040_bl_props.brightness;
 
 	ret = ld9040_parse_dt(ctx);
 	if (ret < 0)
···
 
 	drm_panel_init(&ctx->panel, dev, &ld9040_drm_funcs,
 		       DRM_MODE_CONNECTOR_DPI);
+
+	bldev = devm_backlight_device_register(dev, dev_name(dev), dev,
+					       ctx, &ld9040_bl_ops,
+					       &ld9040_bl_props);
+	if (IS_ERR(bldev))
+		return PTR_ERR(bldev);
 
 	drm_panel_add(&ctx->panel);
 

drivers/gpu/drm/panel/panel-samsung-s6d16d0.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/regulator/consumer.h>
 #include <linux/delay.h>
-#include <linux/of_device.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
 
 struct s6d16d0 {

drivers/gpu/drm/panel/panel-samsung-s6d7aa0.c

···
 #include <linux/module.h>
 #include <linux/regulator/consumer.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 
 #include <video/mipi_display.h>
 #include <drm/drm_mipi_dsi.h>

drivers/gpu/drm/panel/panel-samsung-s6e3ha2.c

···
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/regulator/consumer.h>
 
 #include <drm/drm_mipi_dsi.h>

drivers/gpu/drm/panel/panel-samsung-s6e63m0-dsi.c

···
 
 #include <linux/module.h>
 #include <linux/delay.h>
-#include <linux/of_device.h>
+#include <linux/mod_devicetable.h>
 
 #include <drm/drm_mipi_dsi.h>
 #include <drm/drm_print.h>

drivers/gpu/drm/panel/panel-samsung-sofef00.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/backlight.h>
 

drivers/gpu/drm/panel/panel-simple.c

···
 
 	bool prepared;
 
-	ktime_t prepared_time;
 	ktime_t unprepared_time;
 
 	const struct panel_desc *desc;
···
 
 	if (p->desc->delay.prepare)
 		msleep(p->desc->delay.prepare);
-
-	p->prepared_time = ktime_get_boottime();
 
 	return 0;
 }
···
 		return -ENOMEM;
 
 	panel->enabled = false;
-	panel->prepared_time = 0;
 	panel->desc = desc;
 
 	panel->supply = devm_regulator_get(dev, "power");

drivers/gpu/drm/panel/panel-sitronix-st7701.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/delay.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/regulator/consumer.h>
 
 #include <video/mipi_display.h>

drivers/gpu/drm/panel/panel-sitronix-st7703.c

···
 #include <linux/media-bus-format.h>
 #include <linux/mod_devicetable.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/regulator/consumer.h>
 
 #include <video/display_timing.h>

drivers/gpu/drm/panel/panel-sony-td4353-jdi.c

···
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/regulator/consumer.h>
 
 #include <video/mipi_display.h>

drivers/gpu/drm/panel/panel-truly-nt35597.c

···
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/regulator/consumer.h>

drivers/gpu/drm/panel/panel-visionox-rm69299.c

···
 
 #include <linux/delay.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/mod_devicetable.h>
 #include <linux/gpio/consumer.h>
 #include <linux/regulator/consumer.h>
 

drivers/gpu/drm/panfrost/panfrost_drv.c

···
 /* Copyright 2019 Collabora ltd. */
 
 #include <linux/module.h>
-#include <linux/of_platform.h>
+#include <linux/of.h>
 #include <linux/pagemap.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <drm/panfrost_drm.h>
 #include <drm/drm_drv.h>

drivers/gpu/drm/pl111/pl111_versatile.c

···
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
+#include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/vexpress.h>
 

drivers/gpu/drm/renesas/rcar-du/rcar_du_drv.c

···
 #include <linux/io.h>
 #include <linux/mm.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
 #include <linux/slab.h>

drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c

···
 
 #include <linux/device.h>
 #include <linux/dma-buf.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
 #include <linux/of_platform.h>
+#include <linux/platform_device.h>
 #include <linux/wait.h>
 
 #include "rcar_du_crtc.h"

drivers/gpu/drm/renesas/rcar-du/rcar_du_vsp.c

···
 #include <linux/bitops.h>
 #include <linux/dma-mapping.h>
 #include <linux/of_platform.h>
+#include <linux/platform_device.h>
 #include <linux/scatterlist.h>
 #include <linux/slab.h>
 #include <linux/videodev2.h>

drivers/gpu/drm/renesas/rcar-du/rcar_mipi_dsi.c

···
 #include <linux/math64.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/platform_device.h>
 #include <linux/reset.h>

drivers/gpu/drm/renesas/rcar-du/rzg2l_mipi_dsi.c

···
 #include <linux/iopoll.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>

drivers/gpu/drm/rockchip/analogix_dp-rockchip.c

···
 
 #include <linux/component.h>
 #include <linux/mfd/syscon.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
+#include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/reset.h>
 #include <linux/clk.h>

drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c

···
 #include <linux/mfd/syscon.h>
 #include <linux/module.h>
 #include <linux/of_device.h>
+#include <linux/of_platform.h>
 #include <linux/phy/phy.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 

drivers/gpu/drm/rockchip/inno_hdmi.c

···
 #include <linux/err.h>
 #include <linux/hdmi.h>
 #include <linux/mfd/syscon.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
-#include <linux/of_device.h>
+#include <linux/platform_device.h>
 
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_edid.h>

drivers/gpu/drm/rockchip/rockchip_drm_drv.c

···
  */
 
 #include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/module.h>
 #include <linux/of_graph.h>

drivers/gpu/drm/rockchip/rockchip_drm_vop.c

···
 #include <linux/log2.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/overflow.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>

drivers/gpu/drm/rockchip/rockchip_drm_vop2.c

···
 #include <linux/mfd/syscon.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/of_graph.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>

drivers/gpu/drm/solomon/ssd130x.c

···
 	const struct drm_format_info *fi;
 	unsigned int pitch;
 
-	fi = drm_format_info(DRM_FORMAT_C1);
+	fi = drm_format_info(DRM_FORMAT_R1);
 	if (!fi)
 		return -EINVAL;
 

drivers/gpu/drm/sprd/sprd_dpu.c

···
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_device.h>
 #include <linux/of_graph.h>
-#include <linux/of_irq.h>
+#include <linux/platform_device.h>
 #include <linux/wait.h>
 #include <linux/workqueue.h>
 

drivers/gpu/drm/sprd/sprd_drm.c

···
 
 #include <linux/component.h>
 #include <linux/dma-mapping.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/of_graph.h>
-#include <linux/of_platform.h>
+#include <linux/platform_device.h>
 
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_drv.h>

drivers/gpu/drm/sprd/sprd_dsi.c

···
 
 #include <linux/component.h>
 #include <linux/module.h>
-#include <linux/of_address.h>
-#include <linux/of_device.h>
-#include <linux/of_irq.h>
-#include <linux/of_graph.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
 #include <video/mipi_display.h>
 
 #include <drm/drm_atomic_helper.h>

drivers/gpu/drm/sti/sti_drv.c

···
 #include <linux/dma-mapping.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/of_platform.h>
+#include <linux/platform_device.h>
 
 #include <drm/drm_atomic.h>
 #include <drm/drm_atomic_helper.h>

drivers/gpu/drm/stm/drv.c

···
 
 #include <linux/component.h>
 #include <linux/dma-mapping.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
-#include <linux/of_platform.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 
 #include <drm/drm_aperture.h>

drivers/gpu/drm/stm/ltdc.c

···
 #include <linux/interrupt.h>
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
-#include <linux/of_address.h>
 #include <linux/of_graph.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/platform_device.h>

drivers/gpu/drm/sun4i/sun4i_frontend.c

···
 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>

drivers/gpu/drm/sun4i/sun4i_frontend.h

···
 #define _SUN4I_FRONTEND_H_
 
 #include <linux/list.h>
+#include <linux/mod_devicetable.h>
 
 #define SUN4I_FRONTEND_EN_REG			0x000
 #define SUN4I_FRONTEND_EN_EN				BIT(0)

drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c

···
 #include <linux/i2c.h>
 #include <linux/iopoll.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>

drivers/gpu/drm/sun4i/sun4i_tcon.c

···
 #include <linux/ioport.h>
 #include <linux/media-bus-format.h>
 #include <linux/module.h>
-#include <linux/of_address.h>
-#include <linux/of_device.h>
-#include <linux/of_irq.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/reset.h>
 

drivers/gpu/drm/sun4i/sun8i_dw_hdmi.c

···
 
 #include <linux/component.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 
 #include <drm/drm_modeset_helper_vtables.h>

drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c

···
  */
 
 #include <linux/delay.h>
-#include <linux/of_address.h>
+#include <linux/of.h>
 #include <linux/of_platform.h>
+#include <linux/platform_device.h>
 
 #include "sun8i_dw_hdmi.h"
 

drivers/gpu/drm/sun4i/sun8i_mixer.c

···
 #include <linux/component.h>
 #include <linux/dma-mapping.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/of_graph.h>
+#include <linux/platform_device.h>
 #include <linux/reset.h>
 
 #include <drm/drm_atomic_helper.h>

drivers/gpu/drm/sun4i/sun8i_tcon_top.c

···
 #include <linux/device.h>
 #include <linux/io.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
 #include <linux/platform_device.h>
 

drivers/gpu/drm/tegra/dc.c

···
 #include <linux/iommu.h>
 #include <linux/interconnect.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
 #include <linux/pm_domain.h>
 #include <linux/pm_opp.h>
 #include <linux/pm_runtime.h>

drivers/gpu/drm/tegra/dpaux.c

···
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/pinctrl/pinconf-generic.h>
 #include <linux/pinctrl/pinctrl.h>
 #include <linux/pinctrl/pinmux.h>

drivers/gpu/drm/tegra/gr2d.c

···
 #include <linux/delay.h>
 #include <linux/iommu.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/reset.h>
 

drivers/gpu/drm/tegra/gr3d.c

···
 #include <linux/host1x.h>
 #include <linux/iommu.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_domain.h>
 #include <linux/pm_opp.h>

drivers/gpu/drm/tegra/hdmi.c

···
 #include <linux/hdmi.h>
 #include <linux/math64.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
 #include <linux/pm_opp.h>
 #include <linux/pm_runtime.h>
 #include <linux/regulator/consumer.h>

drivers/gpu/drm/tegra/hub.c

···
 #include <linux/host1x.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/of_graph.h>
+#include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/reset.h>

drivers/gpu/drm/tegra/nvdec.c

···
 #include <linux/iopoll.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/reset.h>

drivers/gpu/drm/tegra/sor.c

···
 #include <linux/debugfs.h>
 #include <linux/io.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/regulator/consumer.h>

drivers/gpu/drm/tegra/vic.c

···
 #include <linux/iommu.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/reset.h>

drivers/gpu/drm/tidss/tidss_dispc.c

···
 #include <linux/module.h>
 #include <linux/mfd/syscon.h>
 #include <linux/of.h>
-#include <linux/of_graph.h>
-#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>

drivers/gpu/drm/tidss/tidss_drv.c

···
  */
 
 #include <linux/console.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/module.h>
 #include <linux/pm_runtime.h>
 

drivers/gpu/drm/vc4/vc4_crtc.c

···
 
 #include <linux/clk.h>
 #include <linux/component.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 
 #include <drm/drm_atomic.h>

drivers/gpu/drm/vc4/vc4_dpi.c

···
 #include <linux/clk.h>
 #include <linux/component.h>
 #include <linux/media-bus-format.h>
-#include <linux/of_graph.h>
-#include <linux/of_platform.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
 #include "vc4_drv.h"
 #include "vc4_regs.h"
 

drivers/gpu/drm/vc4/vc4_drv.c

···
 #include <linux/dma-mapping.h>
 #include <linux/io.h>
 #include <linux/module.h>
-#include <linux/of_platform.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 

drivers/gpu/drm/vc4/vc4_dsi.c

···
 #include <linux/dma-mapping.h>
 #include <linux/dmaengine.h>
 #include <linux/io.h>
+#include <linux/of.h>
 #include <linux/of_address.h>
-#include <linux/of_platform.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 
 #include <drm/drm_atomic_helper.h>

drivers/gpu/drm/vc4/vc4_hdmi.c

···
 #include <linux/component.h>
 #include <linux/gpio/consumer.h>
 #include <linux/i2c.h>
+#include <linux/of.h>
 #include <linux/of_address.h>
-#include <linux/of_platform.h>
 #include <linux/pm_runtime.h>
 #include <linux/rational.h>
 #include <linux/reset.h>

drivers/gpu/drm/vc4/vc4_txp.c

···
 
 #include <linux/clk.h>
 #include <linux/component.h>
-#include <linux/of_graph.h>
-#include <linux/of_platform.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 
 #include <drm/drm_atomic.h>

drivers/gpu/drm/vc4/vc4_vec.c

···
 #include <drm/drm_simple_kms_helper.h>
 #include <linux/clk.h>
 #include <linux/component.h>
-#include <linux/of_graph.h>
-#include <linux/of_platform.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 
 #include "vc4_drv.h"

drivers/gpu/drm/xen/xen_drm_front.c

···
 #include <linux/delay.h>
 #include <linux/dma-mapping.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
 
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_drv.h>

drivers/gpu/host1x/bus.c

···
 	return strcmp(dev_name(dev), drv->name) == 0;
 }
 
+/*
+ * Note that this is really only needed for backwards compatibility
+ * with libdrm, which parses this information from sysfs and will
+ * fail if it can't find the OF_FULLNAME, specifically.
+ */
 static int host1x_device_uevent(const struct device *dev,
 				struct kobj_uevent_env *env)
 {
-	struct device_node *np = dev->parent->of_node;
-	unsigned int count = 0;
-	struct property *p;
-	const char *compat;
-
-	/*
-	 * This duplicates most of of_device_uevent(), but the latter cannot
-	 * be called from modules and operates on dev->of_node, which is not
-	 * available in this case.
-	 *
-	 * Note that this is really only needed for backwards compatibility
-	 * with libdrm, which parses this information from sysfs and will
-	 * fail if it can't find the OF_FULLNAME, specifically.
-	 */
-	add_uevent_var(env, "OF_NAME=%pOFn", np);
-	add_uevent_var(env, "OF_FULLNAME=%pOF", np);
-
-	of_property_for_each_string(np, "compatible", p, compat) {
-		add_uevent_var(env, "OF_COMPATIBLE_%u=%s", count, compat);
-		count++;
-	}
-
-	add_uevent_var(env, "OF_COMPATIBLE_N=%u", count);
+	of_device_uevent(dev->parent, env);
 
 	return 0;
 }

drivers/gpu/host1x/context.c

···
 #include <linux/device.h>
 #include <linux/kref.h>
 #include <linux/of.h>
-#include <linux/of_platform.h>
+#include <linux/of_device.h>
 #include <linux/pid.h>
 #include <linux/slab.h>
 

drivers/gpu/host1x/dev.c

···
 #include <linux/io.h>
 #include <linux/list.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
 #include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/slab.h>
 

drivers/gpu/ipu-v3/ipu-common.c

···
 #include <linux/irq.h>
 #include <linux/irqchip/chained_irq.h>
 #include <linux/irqdomain.h>
-#include <linux/of_device.h>
+#include <linux/of.h>
 #include <linux/of_graph.h>
 
 #include <drm/drm_fourcc.h>

drivers/of/device.c

···
 	}
 	mutex_unlock(&of_mutex);
 }
+EXPORT_SYMBOL_GPL(of_device_uevent);
 
 int of_device_uevent_modalias(const struct device *dev, struct kobj_uevent_env *env)
 {

include/drm/drm_debugfs.h

···
 
 #include <linux/types.h>
 #include <linux/seq_file.h>
+
+#include <drm/drm_gpuva_mgr.h>
+
+/**
+ * DRM_DEBUGFS_GPUVA_INFO - &drm_info_list entry to dump a GPU VA space
+ * @show: the &drm_info_list's show callback
+ * @data: driver private data
+ *
+ * Drivers should use this macro to define a &drm_info_list entry to provide a
+ * debugfs file for dumping the GPU VA space regions and mappings.
+ *
+ * For each DRM GPU VA space drivers should call drm_debugfs_gpuva_info() from
+ * their @show callback.
+ */
+#define DRM_DEBUGFS_GPUVA_INFO(show, data) {"gpuvas", show, DRIVER_GEM_GPUVA, data}
+
 /**
  * struct drm_info_list - debugfs info list entry
  *
···
 
 void drm_debugfs_add_files(struct drm_device *dev,
 			   const struct drm_debugfs_info *files, int count);
+
+int drm_debugfs_gpuva_info(struct seq_file *m,
+			   struct drm_gpuva_manager *mgr);
 #else
 static inline void drm_debugfs_create_files(const struct drm_info_list *files,
 					    int count, struct dentry *root,
···
 					 const struct drm_debugfs_info *files,
 					 int count)
 {}
+
+static inline int drm_debugfs_gpuva_info(struct seq_file *m,
+					 struct drm_gpuva_manager *mgr)
+{
+	return 0;
+}
 #endif
 
 #endif /* _DRM_DEBUGFS_H_ */

include/drm/drm_drv.h

···
 	 * acceleration should be handled by two drivers that are connected using auxiliary bus.
 	 */
 	DRIVER_COMPUTE_ACCEL            = BIT(7),
+	/**
+	 * @DRIVER_GEM_GPUVA:
+	 *
+	 * Driver supports user defined GPU VA bindings for GEM objects.
+	 */
+	DRIVER_GEM_GPUVA		= BIT(8),
 
 	/* IMPORTANT: Below are all the legacy flags, add new ones above. */
 

include/drm/drm_file.h

···
  * header include loops we need it here for now.
  */
 
-/* Note that the order of this enum is ABI (it determines
+/* Note that the values of this enum are ABI (it determines
  * /dev/dri/renderD* numbers).
  *
  * Setting DRM_MINOR_ACCEL to 32 gives enough space for more drm minors to
  * be implemented before we hit any future
  */
 enum drm_minor_type {
-	DRM_MINOR_PRIMARY,
-	DRM_MINOR_CONTROL,
-	DRM_MINOR_RENDER,
+	DRM_MINOR_PRIMARY = 0,
+	DRM_MINOR_CONTROL = 1,
+	DRM_MINOR_RENDER = 2,
 	DRM_MINOR_ACCEL = 32,
 };
 

include/drm/drm_gem.h

···
 
 #include <linux/kref.h>
 #include <linux/dma-resv.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
 
 #include <drm/drm_vma_manager.h>
 
···
 	struct dma_resv _resv;
 
 	/**
+	 * @gpuva:
+	 *
+	 * Provides the list of GPU VAs attached to this GEM object.
+	 *
+	 * Drivers should lock list accesses with the GEMs &dma_resv lock
+	 * (&drm_gem_object.resv) or a custom lock if one is provided.
+	 */
+	struct {
+		struct list_head list;
+
+#ifdef CONFIG_LOCKDEP
+		struct lockdep_map *lock_dep_map;
+#endif
+	} gpuva;
+
+	/**
 	 * @funcs:
 	 *
 	 * Optional GEM object functions. If this is set, it will be used instead of the
···
 			       bool (*shrink)(struct drm_gem_object *obj));
 
 int drm_gem_evict(struct drm_gem_object *obj);
+
+#ifdef CONFIG_LOCKDEP
+/**
+ * drm_gem_gpuva_set_lock() - Set the lock protecting accesses to the gpuva list.
+ * @obj: the &drm_gem_object
+ * @lock: the lock used to protect the gpuva list. The locking primitive
+ * must contain a dep_map field.
+ *
+ * Call this if you're not proctecting access to the gpuva list
+ * with the dma-resv lock, otherwise, drm_gem_gpuva_init() takes care
+ * of initializing lock_dep_map for you.
+ */
+#define drm_gem_gpuva_set_lock(obj, lock) \
+	if (!(obj)->gpuva.lock_dep_map) \
+		(obj)->gpuva.lock_dep_map = &(lock)->dep_map
+#define drm_gem_gpuva_assert_lock_held(obj) \
+	lockdep_assert(lock_is_held((obj)->gpuva.lock_dep_map))
+#else
+#define drm_gem_gpuva_set_lock(obj, lock) do {} while (0)
+#define drm_gem_gpuva_assert_lock_held(obj) do {} while (0)
+#endif
+
+/**
+ * drm_gem_gpuva_init() - initialize the gpuva list of a GEM object
+ * @obj: the &drm_gem_object
+ *
+ * This initializes the &drm_gem_object's &drm_gpuva list.
+ *
+ * Calling this function is only necessary for drivers intending to support the
+ * &drm_driver_feature DRIVER_GEM_GPUVA.
+ */
+static inline void drm_gem_gpuva_init(struct drm_gem_object *obj)
+{
+	INIT_LIST_HEAD(&obj->gpuva.list);
+	drm_gem_gpuva_set_lock(obj, &obj->resv->lock.base);
+}
+
+/**
+ * drm_gem_for_each_gpuva() - iternator to walk over a list of gpuvas
+ * @entry__: &drm_gpuva structure to assign to in each iteration step
+ * @obj__: the &drm_gem_object the &drm_gpuvas to walk are associated with
+ *
+ * This iterator walks over all &drm_gpuva structures associated with the
+ * &drm_gpuva_manager.
+ */
+#define drm_gem_for_each_gpuva(entry__, obj__) \
+	list_for_each_entry(entry__, &(obj__)->gpuva.list, gem.entry)
+
+/**
+ * drm_gem_for_each_gpuva_safe() - iternator to safely walk over a list of
+ * gpuvas
+ * @entry__: &drm_gpuva structure to assign to in each iteration step
+ * @next__: &next &drm_gpuva to store the next step
+ * @obj__: the &drm_gem_object the &drm_gpuvas to walk are associated with
+ *
+ * This iterator walks over all &drm_gpuva structures associated with the
+ * &drm_gem_object. It is implemented with list_for_each_entry_safe(), hence
+ * it is save against removal of elements.
+ */
+#define drm_gem_for_each_gpuva_safe(entry__, next__, obj__) \
+	list_for_each_entry_safe(entry__, next__, &(obj__)->gpuva.list, gem.entry)
 
 #endif /* __DRM_GEM_H__ */

include/drm/drm_gpuva_mgr.h

···
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __DRM_GPUVA_MGR_H__
+#define __DRM_GPUVA_MGR_H__
+
+/*
+ * Copyright (c) 2022 Red Hat.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ */
+
+#include <linux/list.h>
+#include <linux/rbtree.h>
+#include <linux/types.h>
+
+#include <drm/drm_gem.h>
+
+struct drm_gpuva_manager;
+struct drm_gpuva_fn_ops;
+
+/**
+ * enum drm_gpuva_flags - flags for struct drm_gpuva
+ */
+enum drm_gpuva_flags {
+	/**
+	 * @DRM_GPUVA_INVALIDATED:
+	 *
+	 * Flag indicating that the &drm_gpuva's backing GEM is invalidated.
+	 */
+	DRM_GPUVA_INVALIDATED = (1 << 0),
+
+	/**
+	 * @DRM_GPUVA_SPARSE:
+	 *
+	 * Flag indicating that the &drm_gpuva is a sparse mapping.
+	 */
+	DRM_GPUVA_SPARSE = (1 << 1),
+
+	/**
+	 * @DRM_GPUVA_USERBITS: user defined bits
+	 */
+	DRM_GPUVA_USERBITS = (1 << 2),
+};
+
+/**
+ * struct drm_gpuva - structure to track a GPU VA mapping
+ *
+ * This structure represents a GPU VA mapping and is associated with a
+ * &drm_gpuva_manager.
+ *
+ * Typically, this structure is embedded in bigger driver structures.
+ */
+struct drm_gpuva {
+	/**
+	 * @mgr: the &drm_gpuva_manager this object is associated with
+	 */
+	struct drm_gpuva_manager *mgr;
+
+	/**
+	 * @flags: the &drm_gpuva_flags for this mapping
+	 */
+	enum drm_gpuva_flags flags;
+
+	/**
+	 * @va: structure containing the address and range of the &drm_gpuva
+	 */
+	struct {
+		/**
+		 * @addr: the start address
+		 */
+		u64 addr;
+
+		/*
+		 * @range: the range
+		 */
+		u64 range;
+	} va;
+
+	/**
+	 * @gem: structure containing the &drm_gem_object and it's offset
+	 */
+	struct {
+		/**
+		 * @offset: the offset within the &drm_gem_object
+		 */
+		u64 offset;
+
+		/**
+		 * @obj: the mapped &drm_gem_object
+		 */
+		struct drm_gem_object *obj;
+
+		/**
+		 * @entry: the &list_head to attach this object to a &drm_gem_object
+		 */
+		struct list_head entry;
+	} gem;
+
+	/**
+	 * @rb: structure containing data to store &drm_gpuvas in a rb-tree
+	 */
+	struct {
+		/**
+		 * @rb: the rb-tree node
+		 */
+		struct rb_node node;
+
+		/**
+		 * @entry: The &list_head to additionally connect &drm_gpuvas
+		 * in the same order they appear in the interval tree. This is
+		 * useful to keep iterating &drm_gpuvas from a start node found
+		 * through the rb-tree while doing modifications on the rb-tree
+		 * itself.
+		 */
+		struct list_head entry;
+
+		/**
+		 * @__subtree_last: needed by the interval tree, holding last-in-subtree
+		 */
+		u64 __subtree_last;
+	} rb;
+};
+
+int drm_gpuva_insert(struct drm_gpuva_manager *mgr, struct drm_gpuva *va);
+void drm_gpuva_remove(struct drm_gpuva *va);
+
+void drm_gpuva_link(struct drm_gpuva *va);
+void drm_gpuva_unlink(struct drm_gpuva *va);
+
+struct drm_gpuva *drm_gpuva_find(struct drm_gpuva_manager *mgr,
+				 u64 addr, u64 range);
+struct drm_gpuva *drm_gpuva_find_first(struct drm_gpuva_manager *mgr,
+				       u64 addr, u64 range);
+struct drm_gpuva *drm_gpuva_find_prev(struct drm_gpuva_manager *mgr, u64 start);
+struct drm_gpuva *drm_gpuva_find_next(struct drm_gpuva_manager *mgr, u64 end);
+
+bool drm_gpuva_interval_empty(struct drm_gpuva_manager *mgr, u64 addr, u64 range);
+
+static inline void drm_gpuva_init(struct drm_gpuva *va, u64 addr, u64 range,
+				  struct drm_gem_object *obj, u64 offset)
+{
+	va->va.addr = addr;
+	va->va.range = range;
+	va->gem.obj = obj;
+	va->gem.offset = offset;
+}
+
+/**
+ * drm_gpuva_invalidate() - sets whether the backing GEM of this &drm_gpuva is
+ * invalidated
+ * @va: the &drm_gpuva to set the invalidate flag for
+ * @invalidate: indicates whether the &drm_gpuva is invalidated
+ */
+static inline void drm_gpuva_invalidate(struct drm_gpuva *va, bool invalidate)
+{
+	if (invalidate)
+		va->flags |= DRM_GPUVA_INVALIDATED;
+	else
+		va->flags &= ~DRM_GPUVA_INVALIDATED;
+}
+
+/**
+ * drm_gpuva_invalidated() - indicates whether the backing BO of this &drm_gpuva
+ * is invalidated
+ * @va: the &drm_gpuva to check
+ */
+static inline bool drm_gpuva_invalidated(struct drm_gpuva *va)
+{
+	return va->flags & DRM_GPUVA_INVALIDATED;
+}
+
+/**
+ * struct drm_gpuva_manager - DRM GPU VA Manager
+ *
+ * The DRM GPU VA Manager keeps track of a GPU's virtual address space by using
+ * &maple_tree structures. Typically, this structure is embedded in bigger
+ * driver structures.
+ *
+ * Drivers can pass addresses and ranges in an arbitrary unit, e.g. bytes or
+ * pages.
+ *
+ * There should be one manager instance per GPU virtual address space.
+ */
+struct drm_gpuva_manager {
+	/**
+	 * @name: the name of the DRM GPU VA space
+	 */
+	const char *name;
+
+	/**
+	 * @mm_start: start of the VA space
+	 */
+	u64 mm_start;
+
+	/**
+	 * @mm_range: length of the VA space
+	 */
+	u64 mm_range;
+
+	/**
+	 * @rb: structures to track &drm_gpuva entries
+	 */
+	struct {
+		/**
+		 * @tree: the rb-tree to track GPU VA mappings
+		 */
+		struct rb_root_cached tree;
+
+		/**
+		 * @list: the &list_head to track GPU VA mappings
+		 */
+		struct list_head list;
+	} rb;
+
+	/**
+	 * @kernel_alloc_node:
+	 *
+	 * &drm_gpuva representing the address space cutout reserved for
+	 * the kernel
+	 */
+	struct drm_gpuva kernel_alloc_node;
+
+	/**
+	 * @ops: &drm_gpuva_fn_ops providing the split/merge steps to drivers
+	 */
+	const struct drm_gpuva_fn_ops *ops;
+};
+
+void drm_gpuva_manager_init(struct drm_gpuva_manager *mgr,
+			    const char *name,
+			    u64 start_offset, u64 range,
+			    u64 reserve_offset, u64 reserve_range,
+			    const struct drm_gpuva_fn_ops *ops);
+void drm_gpuva_manager_destroy(struct drm_gpuva_manager *mgr);
+
+static inline struct drm_gpuva *
+__drm_gpuva_next(struct drm_gpuva *va)
+{
+	if (va && !list_is_last(&va->rb.entry, &va->mgr->rb.list))
+		return list_next_entry(va, rb.entry);
+
+	return NULL;
+}
+
+/**
+ * drm_gpuva_for_each_va_range() - iterate over a range of &drm_gpuvas
+ * @va__: &drm_gpuva structure to assign to in each iteration step
+ * @mgr__: &drm_gpuva_manager to walk over
+ * @start__: starting offset, the first gpuva will overlap this
+ * @end__: ending offset, the last gpuva will start before this (but may
+ * overlap)
+ *
+ * This iterator walks over all &drm_gpuvas in the &drm_gpuva_manager that lie
+ * between @start__ and @end__. It is implemented similarly to list_for_each(),
+ * but is using the &drm_gpuva_manager's internal interval tree to accelerate
+ * the search for the starting &drm_gpuva, and hence isn't safe against removal
+ * of elements. It assumes that @end__ is within (or is the upper limit of) the
+ * &drm_gpuva_manager. This iterator does not skip over the &drm_gpuva_manager's
+ * @kernel_alloc_node.
+ */
+#define drm_gpuva_for_each_va_range(va__, mgr__, start__, end__) \
+	for (va__ = drm_gpuva_find_first((mgr__), (start__), (end__) - (start__)); \
+	     va__ && (va__->va.addr < (end__)); \
+	     va__ = __drm_gpuva_next(va__))
+
+/**
+ * drm_gpuva_for_each_va_range_safe() - safely iterate over a range of
+ * &drm_gpuvas
+ * @va__: &drm_gpuva to assign to in each iteration step
+ * @next__: another &drm_gpuva to use as temporary storage
+ * @mgr__: &drm_gpuva_manager to walk over
+ * @start__: starting offset, the first gpuva will overlap this
+ * @end__: ending offset, the last gpuva will start before this (but may
+ * overlap)
+ *
+ * This iterator walks over all &drm_gpuvas in the &drm_gpuva_manager that lie
+ * between @start__ and @end__. It is implemented similarly to
+ * list_for_each_safe(), but is using the &drm_gpuva_manager's internal interval
+ * tree to accelerate the search for the starting &drm_gpuva, and hence is safe
+ * against removal of elements. It assumes that @end__ is within (or is the
+ * upper limit of) the &drm_gpuva_manager. This iterator does not skip over the
+ * &drm_gpuva_manager's @kernel_alloc_node.
+ */
+#define drm_gpuva_for_each_va_range_safe(va__, next__, mgr__, start__, end__) \
+	for (va__ = drm_gpuva_find_first((mgr__), (start__), (end__) - (start__)), \
+	     next__ = __drm_gpuva_next(va__); \
+	     va__ && (va__->va.addr < (end__)); \
+	     va__ = next__, next__ = __drm_gpuva_next(va__))
+
+/**
+ * drm_gpuva_for_each_va() - iterate over all &drm_gpuvas
+ * @va__: &drm_gpuva to assign to in each iteration step
+ * @mgr__: &drm_gpuva_manager to walk over
+ *
+ * This iterator walks over all &drm_gpuva structures associated with the given
+ * &drm_gpuva_manager.
+ */
+#define drm_gpuva_for_each_va(va__, mgr__) \
+	list_for_each_entry(va__, &(mgr__)->rb.list, rb.entry)
+
+/**
+ * drm_gpuva_for_each_va_safe() - safely iterate over all &drm_gpuvas
+ * @va__: &drm_gpuva to assign to in each iteration step
+ * @next__: another &drm_gpuva to use as temporary storage
+ * @mgr__: &drm_gpuva_manager to walk over
+ *
+ * This iterator walks over all &drm_gpuva structures associated with the given
+ * &drm_gpuva_manager. It is implemented with list_for_each_entry_safe(), and
+ * hence safe against the removal of elements.
+ */
+#define drm_gpuva_for_each_va_safe(va__, next__, mgr__) \
+	list_for_each_entry_safe(va__, next__, &(mgr__)->rb.list, rb.entry)
+
+/**
+ * enum drm_gpuva_op_type - GPU VA operation type
+ *
+ * Operations to alter the GPU VA mappings tracked by the &drm_gpuva_manager.
+ */
+enum drm_gpuva_op_type {
+	/**
+	 * @DRM_GPUVA_OP_MAP: the map op type
+	 */
+	DRM_GPUVA_OP_MAP,
+
+	/**
+	 * @DRM_GPUVA_OP_REMAP: the remap op type
+	 */
+	DRM_GPUVA_OP_REMAP,
+
+	/**
+	 * @DRM_GPUVA_OP_UNMAP: the unmap op type
+	 */
+	DRM_GPUVA_OP_UNMAP,
+
+	/**
+	 * @DRM_GPUVA_OP_PREFETCH: the prefetch op type
+	 */
+	DRM_GPUVA_OP_PREFETCH,
+};
+
+/**
+ * struct drm_gpuva_op_map - GPU VA map operation
+ *
+ * This structure represents a single map operation generated by the
+ * DRM GPU VA manager.
+ */
+struct drm_gpuva_op_map {
+	/**
+	 * @va: structure containing address and range of a map
+	 * operation
+	 */
+	struct {
+		/**
+		 * @addr: the base address of the new mapping
+		 */
+		u64 addr;
+
+		/**
+		 * @range: the range of the new mapping
+		 */
+		u64 range;
+	} va;
+
+	/**
+	 * @gem: structure containing the &drm_gem_object and it's offset
+	 */
+	struct {
+		/**
+		 * @offset: the offset within the &drm_gem_object
+		 */
+		u64 offset;
+
+		/**
+		 * @obj: the &drm_gem_object to map
+		 */
+		struct drm_gem_object *obj;
+	} gem;
+};
+
+/**
+ * struct drm_gpuva_op_unmap - GPU VA unmap operation
+ *
+ * This structure represents a single unmap operation generated by the
+ * DRM GPU VA manager.
+ */
+struct drm_gpuva_op_unmap {
+	/**
+	 * @va: the &drm_gpuva to unmap
+	 */
+	struct drm_gpuva *va;
+
+	/**
+	 * @keep:
+	 *
+	 * Indicates whether this &drm_gpuva is physically contiguous with the
+	 * original mapping request.
+	 *
+	 * Optionally, if &keep is set, drivers may keep the actual page table
+	 * mappings for this &drm_gpuva, adding the missing page table entries
+	 * only and update the &drm_gpuva_manager accordingly.
+	 */
+	bool keep;
+};
+
+/**
+ * struct drm_gpuva_op_remap - GPU VA remap operation
+ *
+ * This represents a single remap operation generated by the DRM GPU VA manager.
+ *
+ * A remap operation is generated when an existing GPU VA mmapping is split up
+ * by inserting a new GPU VA mapping or by partially unmapping existent
+ * mapping(s), hence it consists of a maximum of two map and one unmap
+ * operation.
+ *
+ * The @unmap operation takes care of removing the original existing mapping.
+ * @prev is used to remap the preceding part, @next the subsequent part.
+ *
+ * If either a new mapping's start address is aligned with the start address
+ * of the old mapping or the new mapping's end address is aligned with the
+ * end address of the old mapping, either @prev or @next is NULL.
+ *
+ * Note, the reason for a dedicated remap operation, rather than arbitrary
+ * unmap and map operations, is to give drivers the chance of extracting driver
+ * specific data for creating the new mappings from the unmap operations's
+ * &drm_gpuva structure which typically is embedded in larger driver specific
+ * structures.
+ */
+struct drm_gpuva_op_remap {
+	/**
+	 * @prev: the preceding part of a split mapping
+	 */
+	struct drm_gpuva_op_map *prev;
+
+	/**
+	 * @next: the subsequent part of a split mapping
+	 */
+	struct drm_gpuva_op_map *next;
+
+	/**
+	 * @unmap: the unmap operation for the original existing mapping
+	 */
+	struct drm_gpuva_op_unmap *unmap;
+};
+
+/**
+ * struct drm_gpuva_op_prefetch - GPU VA prefetch operation
+ *
+ * This structure represents a single prefetch operation generated by the
+ * DRM GPU VA manager.
+ */
+struct drm_gpuva_op_prefetch {
+	/**
+	 * @va: the &drm_gpuva to prefetch
+	 */
+	struct drm_gpuva *va;
+};
+
+/**
+ * struct drm_gpuva_op - GPU VA operation
+ *
+ * This structure represents a single generic operation.
+ *
+ * The particular type of the operation is defined by @op.
+ */
+struct drm_gpuva_op {
+	/**
+	 * @entry:
+	 *
+	 * The &list_head used to distribute instances of this struct within
+	 * &drm_gpuva_ops.
+	 */
+	struct list_head entry;
+
+	/**
+	 * @op: the type of the operation
+	 */
+	enum drm_gpuva_op_type op;
+
+	union {
+		/**
+		 * @map: the map operation
+		 */
+		struct drm_gpuva_op_map map;
+
+		/**
+		 * @remap: the remap operation
+		 */
+		struct drm_gpuva_op_remap remap;
+
+		/**
+		 * @unmap: the unmap operation
+		 */
+		struct drm_gpuva_op_unmap unmap;
+
+		/**
+		 * @prefetch: the prefetch operation
+		 */
+		struct drm_gpuva_op_prefetch prefetch;
+	};
+};
+
+/**
+ * struct drm_gpuva_ops - wraps a list of &drm_gpuva_op
+ */
+struct drm_gpuva_ops {
+	/**
+	 * @list: the &list_head
+	 */
+	struct list_head list;
+};
+
+/**
+ * drm_gpuva_for_each_op() - iterator to walk over &drm_gpuva_ops
+ * @op: &drm_gpuva_op to assign in each iteration step
+ * @ops: &drm_gpuva_ops to walk
+ *
+ * This iterator walks over all ops within a given list of operations.
+ */
+#define drm_gpuva_for_each_op(op, ops) list_for_each_entry(op, &(ops)->list, entry)
+
+/**
+ * drm_gpuva_for_each_op_safe() - iterator to safely walk over &drm_gpuva_ops
+ * @op: &drm_gpuva_op to assign in each iteration step
+ * @next: &next &drm_gpuva_op to store the next step
+ * @ops: &drm_gpuva_ops to walk
+ *
+ * This iterator walks over all ops within a given list of operations. It is
+ * implemented with list_for_each_safe(), so save against removal of elements.
+ */
+#define drm_gpuva_for_each_op_safe(op, next, ops) \
+	list_for_each_entry_safe(op, next, &(ops)->list, entry)
+
+/**
+ * drm_gpuva_for_each_op_from_reverse() - iterate backwards from the given point
+ * @op: &drm_gpuva_op to assign in each iteration step
+ * @ops: &drm_gpuva_ops to walk
+ *
+ * This iterator walks over all ops within a given list of operations beginning
+ * from the given operation in reverse order.
+ */
+#define drm_gpuva_for_each_op_from_reverse(op, ops) \
+	list_for_each_entry_from_reverse(op, &(ops)->list, entry)
+
+/**
+ * drm_gpuva_first_op() - returns the first &drm_gpuva_op from &drm_gpuva_ops
+ * @ops: the &drm_gpuva_ops to get the fist &drm_gpuva_op from
+ */
+#define drm_gpuva_first_op(ops) \
+	list_first_entry(&(ops)->list, struct drm_gpuva_op, entry)
+
+/**
+ * drm_gpuva_last_op() - returns the last &drm_gpuva_op from &drm_gpuva_ops
+ * @ops: the &drm_gpuva_ops to get the last &drm_gpuva_op from
+ */
+#define drm_gpuva_last_op(ops) \
+	list_last_entry(&(ops)->list, struct drm_gpuva_op, entry)
+
+/**
+ * drm_gpuva_prev_op() - previous &drm_gpuva_op in the list
+ * @op: the current &drm_gpuva_op
+ */
+#define drm_gpuva_prev_op(op) list_prev_entry(op, entry)
+
+/**
+ * drm_gpuva_next_op() - next &drm_gpuva_op in the list
+ * @op: the current &drm_gpuva_op
+ */
+#define drm_gpuva_next_op(op) list_next_entry(op, entry)
+
+struct drm_gpuva_ops *
+drm_gpuva_sm_map_ops_create(struct drm_gpuva_manager *mgr,
+			    u64 addr, u64 range,
+			    struct drm_gem_object *obj, u64 offset);
+struct drm_gpuva_ops *
+drm_gpuva_sm_unmap_ops_create(struct drm_gpuva_manager *mgr,
+			      u64 addr, u64 range);
+
+struct drm_gpuva_ops *
+drm_gpuva_prefetch_ops_create(struct drm_gpuva_manager *mgr,
+				 u64 addr, u64 range);
+
+struct drm_gpuva_ops *
+drm_gpuva_gem_unmap_ops_create(struct drm_gpuva_manager *mgr,
+			       struct drm_gem_object *obj);
+
+void drm_gpuva_ops_free(struct drm_gpuva_manager *mgr,
+			struct drm_gpuva_ops *ops);
+
+static inline void drm_gpuva_init_from_op(struct drm_gpuva *va,
+					  struct drm_gpuva_op_map *op)
+{
+	drm_gpuva_init(va, op->va.addr, op->va.range,
+		       op->gem.obj, op->gem.offset);
+}
+
+/**
+ * struct drm_gpuva_fn_ops - callbacks for split/merge steps
+ *
+ * This structure defines the callbacks used by &drm_gpuva_sm_map and
+ * &drm_gpuva_sm_unmap to provide the split/merge steps for map and unmap
+ * operations to drivers.
+ */
+struct drm_gpuva_fn_ops {
+	/**
+	 * @op_alloc: called when the &drm_gpuva_manager allocates
+	 * a struct drm_gpuva_op
+	 *
+	 * Some drivers may want to embed struct drm_gpuva_op into driver
+	 * specific structures. By implementing this callback drivers can
+	 * allocate memory accordingly.
+	 *
+	 * This callback is optional.
+	 */
+	struct drm_gpuva_op *(*op_alloc)(void);
+
+	/**
+	 * @op_free: called when the &drm_gpuva_manager frees a
+	 * struct drm_gpuva_op
+	 *
+	 * Some drivers may want to embed struct drm_gpuva_op into driver
+	 * specific structures. By implementing this callback drivers can
+	 * free the previously allocated memory accordingly.
+	 *
+	 * This callback is optional.
+	 */
+	void (*op_free)(struct drm_gpuva_op *op);
+
+	/**
+	 * @sm_step_map: called from &drm_gpuva_sm_map to finally insert the
+	 * mapping once all previous steps were completed
+	 *
+	 * The &priv pointer matches the one the driver passed to
+	 * &drm_gpuva_sm_map or &drm_gpuva_sm_unmap, respectively.
+	 *
+	 * Can be NULL if &drm_gpuva_sm_map is used.
+	 */
+	int (*sm_step_map)(struct drm_gpuva_op *op, void *priv);
+
+	/**
+	 * @sm_step_remap: called from &drm_gpuva_sm_map and
+	 * &drm_gpuva_sm_unmap to split up an existent mapping
+	 *
+	 * This callback is called when existent mapping needs to be split up.
+	 * This is the case when either a newly requested mapping overlaps or
+	 * is enclosed by an existent mapping or a partial unmap of an existent
+	 * mapping is requested.
+	 *
+	 * The &priv pointer matches the one the driver passed to
+	 * &drm_gpuva_sm_map or &drm_gpuva_sm_unmap, respectively.
+	 *
+	 * Can be NULL if neither &drm_gpuva_sm_map nor &drm_gpuva_sm_unmap is
+	 * used.
+	 */
+	int (*sm_step_remap)(struct drm_gpuva_op *op, void *priv);
+
+	/**
+	 * @sm_step_unmap: called from &drm_gpuva_sm_map and
+	 * &drm_gpuva_sm_unmap to unmap an existent mapping
+	 *
+	 * This callback is called when existent mapping needs to be unmapped.
+	 * This is the case when either a newly requested mapping encloses an
+	 * existent mapping or an unmap of an existent mapping is requested.
+	 *
+	 * The &priv pointer matches the one the driver passed to
+	 * &drm_gpuva_sm_map or &drm_gpuva_sm_unmap, respectively.
+	 *
+	 * Can be NULL if neither &drm_gpuva_sm_map nor &drm_gpuva_sm_unmap is
+	 * used.
+	 */
+	int (*sm_step_unmap)(struct drm_gpuva_op *op, void *priv);
+};
+
+int drm_gpuva_sm_map(struct drm_gpuva_manager *mgr, void *priv,
+		     u64 addr, u64 range,
+		     struct drm_gem_object *obj, u64 offset);
+
+int drm_gpuva_sm_unmap(struct drm_gpuva_manager *mgr, void *priv,
+		       u64 addr, u64 range);
+
+void drm_gpuva_map(struct drm_gpuva_manager *mgr,
+		   struct drm_gpuva *va,
+		   struct drm_gpuva_op_map *op);
+
+void drm_gpuva_remap(struct drm_gpuva *prev,
+		     struct drm_gpuva *next,
+		     struct drm_gpuva_op_remap *op);
+
+void drm_gpuva_unmap(struct drm_gpuva_op_unmap *op);
+
+#endif /* __DRM_GPUVA_MGR_H__ */

include/drm/drm_syncobj.h

···
 	 */
 	struct list_head cb_list;
 	/**
-	 * @lock: Protects &cb_list and write-locks &fence.
+	 * @ev_fd_list: List of registered eventfd.
+	 */
+	struct list_head ev_fd_list;
+	/**
+	 * @lock: Protects &cb_list and &ev_fd_list, and write-locks &fence.
 	 */
 	spinlock_t lock;
 	/**

include/uapi/drm/drm.h

···
 	__u32 pad;
 };
 
+/**
+ * struct drm_syncobj_eventfd
+ * @handle: syncobj handle.
+ * @flags: Zero to wait for the point to be signalled, or
+ *         &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE to wait for a fence to be
+ *         available for the point.
+ * @point: syncobj timeline point (set to zero for binary syncobjs).
+ * @fd: Existing eventfd to sent events to.
+ * @pad: Must be zero.
+ *
+ * Register an eventfd to be signalled by a syncobj. The eventfd counter will
+ * be incremented by one.
+ */
+struct drm_syncobj_eventfd {
+	__u32 handle;
+	__u32 flags;
+	__u64 point;
+	__s32 fd;
+	__u32 pad;
+};
+
 
 struct drm_syncobj_array {
 	__u64 handles;
···
  * double-close handles which are specified multiple times in the array.
  */
 #define DRM_IOCTL_MODE_GETFB2		DRM_IOWR(0xCE, struct drm_mode_fb_cmd2)
+
+#define DRM_IOCTL_SYNCOBJ_EVENTFD	DRM_IOWR(0xCF, struct drm_syncobj_eventfd)
 
 /*
  * Device specific ioctls should only be in their respective headers