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diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
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+/*
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * Copyright (c) 2009-2010, Code Aurora Forum.
+ * Copyright 2016 Intel Corp.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _DRM_DRV_H_
+#define _DRM_DRV_H_
+
+#include <linux/list.h>
+#include <linux/irqreturn.h>
+
+#include <drm/drm_device.h>
+
+struct drm_file;
+struct drm_gem_object;
+struct drm_master;
+struct drm_minor;
+struct dma_buf;
+struct dma_buf_attachment;
+struct drm_display_mode;
+struct drm_mode_create_dumb;
+struct drm_printer;
+struct sg_table;
+
+/**
+ * enum drm_driver_feature - feature flags
+ *
+ * See &drm_driver.driver_features, drm_device.driver_features and
+ * drm_core_check_feature().
+ */
+enum drm_driver_feature {
+ /**
+ * @DRIVER_GEM:
+ *
+ * Driver use the GEM memory manager. This should be set for all modern
+ * drivers.
+ */
+ DRIVER_GEM = BIT(0),
+ /**
+ * @DRIVER_MODESET:
+ *
+ * Driver supports mode setting interfaces (KMS).
+ */
+ DRIVER_MODESET = BIT(1),
+ /**
+ * @DRIVER_RENDER:
+ *
+ * Driver supports dedicated render nodes. See also the :ref:`section on
+ * render nodes <drm_render_node>` for details.
+ */
+ DRIVER_RENDER = BIT(3),
+ /**
+ * @DRIVER_ATOMIC:
+ *
+ * Driver supports the full atomic modesetting userspace API. Drivers
+ * which only use atomic internally, but do not support the full
+ * userspace API (e.g. not all properties converted to atomic, or
+ * multi-plane updates are not guaranteed to be tear-free) should not
+ * set this flag.
+ */
+ DRIVER_ATOMIC = BIT(4),
+ /**
+ * @DRIVER_SYNCOBJ:
+ *
+ * Driver supports &drm_syncobj for explicit synchronization of command
+ * submission.
+ */
+ DRIVER_SYNCOBJ = BIT(5),
+ /**
+ * @DRIVER_SYNCOBJ_TIMELINE:
+ *
+ * Driver supports the timeline flavor of &drm_syncobj for explicit
+ * synchronization of command submission.
+ */
+ DRIVER_SYNCOBJ_TIMELINE = BIT(6),
+
+ /* IMPORTANT: Below are all the legacy flags, add new ones above. */
+
+ /**
+ * @DRIVER_USE_AGP:
+ *
+ * Set up DRM AGP support, see drm_agp_init(), the DRM core will manage
+ * AGP resources. New drivers don't need this.
+ */
+ DRIVER_USE_AGP = BIT(25),
+ /**
+ * @DRIVER_LEGACY:
+ *
+ * Denote a legacy driver using shadow attach. Do not use.
+ */
+ DRIVER_LEGACY = BIT(26),
+ /**
+ * @DRIVER_PCI_DMA:
+ *
+ * Driver is capable of PCI DMA, mapping of PCI DMA buffers to userspace
+ * will be enabled. Only for legacy drivers. Do not use.
+ */
+ DRIVER_PCI_DMA = BIT(27),
+ /**
+ * @DRIVER_SG:
+ *
+ * Driver can perform scatter/gather DMA, allocation and mapping of
+ * scatter/gather buffers will be enabled. Only for legacy drivers. Do
+ * not use.
+ */
+ DRIVER_SG = BIT(28),
+
+ /**
+ * @DRIVER_HAVE_DMA:
+ *
+ * Driver supports DMA, the userspace DMA API will be supported. Only
+ * for legacy drivers. Do not use.
+ */
+ DRIVER_HAVE_DMA = BIT(29),
+ /**
+ * @DRIVER_HAVE_IRQ:
+ *
+ * Legacy irq support. Only for legacy drivers. Do not use.
+ */
+ DRIVER_HAVE_IRQ = BIT(30),
+ /**
+ * @DRIVER_KMS_LEGACY_CONTEXT:
+ *
+ * Used only by nouveau for backwards compatibility with existing
+ * userspace. Do not use.
+ */
+ DRIVER_KMS_LEGACY_CONTEXT = BIT(31),
+};
+
+/**
+ * struct drm_driver - DRM driver structure
+ *
+ * This structure represent the common code for a family of cards. There will be
+ * one &struct drm_device for each card present in this family. It contains lots
+ * of vfunc entries, and a pile of those probably should be moved to more
+ * appropriate places like &drm_mode_config_funcs or into a new operations
+ * structure for GEM drivers.
+ */
+struct drm_driver {
+ /**
+ * @load:
+ *
+ * Backward-compatible driver callback to complete initialization steps
+ * after the driver is registered. For this reason, may suffer from
+ * race conditions and its use is deprecated for new drivers. It is
+ * therefore only supported for existing drivers not yet converted to
+ * the new scheme. See devm_drm_dev_alloc() and drm_dev_register() for
+ * proper and race-free way to set up a &struct drm_device.
+ *
+ * This is deprecated, do not use!
+ *
+ * Returns:
+ *
+ * Zero on success, non-zero value on failure.
+ */
+ int (*load) (struct drm_device *, unsigned long flags);
+
+ /**
+ * @open:
+ *
+ * Driver callback when a new &struct drm_file is opened. Useful for
+ * setting up driver-private data structures like buffer allocators,
+ * execution contexts or similar things. Such driver-private resources
+ * must be released again in @postclose.
+ *
+ * Since the display/modeset side of DRM can only be owned by exactly
+ * one &struct drm_file (see &drm_file.is_master and &drm_device.master)
+ * there should never be a need to set up any modeset related resources
+ * in this callback. Doing so would be a driver design bug.
+ *
+ * Returns:
+ *
+ * 0 on success, a negative error code on failure, which will be
+ * promoted to userspace as the result of the open() system call.
+ */
+ int (*open) (struct drm_device *, struct drm_file *);
+
+ /**
+ * @postclose:
+ *
+ * One of the driver callbacks when a new &struct drm_file is closed.
+ * Useful for tearing down driver-private data structures allocated in
+ * @open like buffer allocators, execution contexts or similar things.
+ *
+ * Since the display/modeset side of DRM can only be owned by exactly
+ * one &struct drm_file (see &drm_file.is_master and &drm_device.master)
+ * there should never be a need to tear down any modeset related
+ * resources in this callback. Doing so would be a driver design bug.
+ */
+ void (*postclose) (struct drm_device *, struct drm_file *);
+
+ /**
+ * @lastclose:
+ *
+ * Called when the last &struct drm_file has been closed and there's
+ * currently no userspace client for the &struct drm_device.
+ *
+ * Modern drivers should only use this to force-restore the fbdev
+ * framebuffer using drm_fb_helper_restore_fbdev_mode_unlocked().
+ * Anything else would indicate there's something seriously wrong.
+ * Modern drivers can also use this to execute delayed power switching
+ * state changes, e.g. in conjunction with the :ref:`vga_switcheroo`
+ * infrastructure.
+ *
+ * This is called after @postclose hook has been called.
+ *
+ * NOTE:
+ *
+ * All legacy drivers use this callback to de-initialize the hardware.
+ * This is purely because of the shadow-attach model, where the DRM
+ * kernel driver does not really own the hardware. Instead ownershipe is
+ * handled with the help of userspace through an inheritedly racy dance
+ * to set/unset the VT into raw mode.
+ *
+ * Legacy drivers initialize the hardware in the @firstopen callback,
+ * which isn't even called for modern drivers.
+ */
+ void (*lastclose) (struct drm_device *);
+
+ /**
+ * @unload:
+ *
+ * Reverse the effects of the driver load callback. Ideally,
+ * the clean up performed by the driver should happen in the
+ * reverse order of the initialization. Similarly to the load
+ * hook, this handler is deprecated and its usage should be
+ * dropped in favor of an open-coded teardown function at the
+ * driver layer. See drm_dev_unregister() and drm_dev_put()
+ * for the proper way to remove a &struct drm_device.
+ *
+ * The unload() hook is called right after unregistering
+ * the device.
+ *
+ */
+ void (*unload) (struct drm_device *);
+
+ /**
+ * @release:
+ *
+ * Optional callback for destroying device data after the final
+ * reference is released, i.e. the device is being destroyed.
+ *
+ * This is deprecated, clean up all memory allocations associated with a
+ * &drm_device using drmm_add_action(), drmm_kmalloc() and related
+ * managed resources functions.
+ */
+ void (*release) (struct drm_device *);
+
+ /**
+ * @master_set:
+ *
+ * Called whenever the minor master is set. Only used by vmwgfx.
+ */
+ void (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
+ bool from_open);
+ /**
+ * @master_drop:
+ *
+ * Called whenever the minor master is dropped. Only used by vmwgfx.
+ */
+ void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv);
+
+ /**
+ * @debugfs_init:
+ *
+ * Allows drivers to create driver-specific debugfs files.
+ */
+ void (*debugfs_init)(struct drm_minor *minor);
+
+ /**
+ * @gem_create_object: constructor for gem objects
+ *
+ * Hook for allocating the GEM object struct, for use by the CMA
+ * and SHMEM GEM helpers. Returns a GEM object on success, or an
+ * ERR_PTR()-encoded error code otherwise.
+ */
+ struct drm_gem_object *(*gem_create_object)(struct drm_device *dev,
+ size_t size);
+
+ /**
+ * @prime_handle_to_fd:
+ *
+ * Main PRIME export function. Should be implemented with
+ * drm_gem_prime_handle_to_fd() for GEM based drivers.
+ *
+ * For an in-depth discussion see :ref:`PRIME buffer sharing
+ * documentation <prime_buffer_sharing>`.
+ */
+ int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
+ uint32_t handle, uint32_t flags, int *prime_fd);
+ /**
+ * @prime_fd_to_handle:
+ *
+ * Main PRIME import function. Should be implemented with
+ * drm_gem_prime_fd_to_handle() for GEM based drivers.
+ *
+ * For an in-depth discussion see :ref:`PRIME buffer sharing
+ * documentation <prime_buffer_sharing>`.
+ */
+ int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
+ int prime_fd, uint32_t *handle);
+
+ /**
+ * @gem_prime_import:
+ *
+ * Import hook for GEM drivers.
+ *
+ * This defaults to drm_gem_prime_import() if not set.
+ */
+ struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
+ struct dma_buf *dma_buf);
+ /**
+ * @gem_prime_import_sg_table:
+ *
+ * Optional hook used by the PRIME helper functions
+ * drm_gem_prime_import() respectively drm_gem_prime_import_dev().
+ */
+ struct drm_gem_object *(*gem_prime_import_sg_table)(
+ struct drm_device *dev,
+ struct dma_buf_attachment *attach,
+ struct sg_table *sgt);
+ /**
+ * @gem_prime_mmap:
+ *
+ * mmap hook for GEM drivers, used to implement dma-buf mmap in the
+ * PRIME helpers.
+ *
+ * This hook only exists for historical reasons. Drivers must use
+ * drm_gem_prime_mmap() to implement it.
+ *
+ * FIXME: Convert all drivers to implement mmap in struct
+ * &drm_gem_object_funcs and inline drm_gem_prime_mmap() into
+ * its callers. This hook should be removed afterwards.
+ */
+ int (*gem_prime_mmap)(struct drm_gem_object *obj, struct vm_area_struct *vma);
+
+ /**
+ * @dumb_create:
+ *
+ * This creates a new dumb buffer in the driver's backing storage manager (GEM,
+ * TTM or something else entirely) and returns the resulting buffer handle. This
+ * handle can then be wrapped up into a framebuffer modeset object.
+ *
+ * Note that userspace is not allowed to use such objects for render
+ * acceleration - drivers must create their own private ioctls for such a use
+ * case.
+ *
+ * Width, height and depth are specified in the &drm_mode_create_dumb
+ * argument. The callback needs to fill the handle, pitch and size for
+ * the created buffer.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ *
+ * Zero on success, negative errno on failure.
+ */
+ int (*dumb_create)(struct drm_file *file_priv,
+ struct drm_device *dev,
+ struct drm_mode_create_dumb *args);
+ /**
+ * @dumb_map_offset:
+ *
+ * Allocate an offset in the drm device node's address space to be able to
+ * memory map a dumb buffer.
+ *
+ * The default implementation is drm_gem_create_mmap_offset(). GEM based
+ * drivers must not overwrite this.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ *
+ * Zero on success, negative errno on failure.
+ */
+ int (*dumb_map_offset)(struct drm_file *file_priv,
+ struct drm_device *dev, uint32_t handle,
+ uint64_t *offset);
+ /**
+ * @dumb_destroy:
+ *
+ * This destroys the userspace handle for the given dumb backing storage buffer.
+ * Since buffer objects must be reference counted in the kernel a buffer object
+ * won't be immediately freed if a framebuffer modeset object still uses it.
+ *
+ * Called by the user via ioctl.
+ *
+ * The default implementation is drm_gem_dumb_destroy(). GEM based drivers
+ * must not overwrite this.
+ *
+ * Returns:
+ *
+ * Zero on success, negative errno on failure.
+ */
+ int (*dumb_destroy)(struct drm_file *file_priv,
+ struct drm_device *dev,
+ uint32_t handle);
+
+ /** @major: driver major number */
+ int major;
+ /** @minor: driver minor number */
+ int minor;
+ /** @patchlevel: driver patch level */
+ int patchlevel;
+ /** @name: driver name */
+ char *name;
+ /** @desc: driver description */
+ char *desc;
+ /** @date: driver date */
+ char *date;
+
+ /**
+ * @driver_features:
+ * Driver features, see &enum drm_driver_feature. Drivers can disable
+ * some features on a per-instance basis using
+ * &drm_device.driver_features.
+ */
+ u32 driver_features;
+
+ /**
+ * @ioctls:
+ *
+ * Array of driver-private IOCTL description entries. See the chapter on
+ * :ref:`IOCTL support in the userland interfaces
+ * chapter<drm_driver_ioctl>` for the full details.
+ */
+
+ const struct drm_ioctl_desc *ioctls;
+ /** @num_ioctls: Number of entries in @ioctls. */
+ int num_ioctls;
+
+ /**
+ * @fops:
+ *
+ * File operations for the DRM device node. See the discussion in
+ * :ref:`file operations<drm_driver_fops>` for in-depth coverage and
+ * some examples.
+ */
+ const struct file_operations *fops;
+
+#ifdef CONFIG_DRM_LEGACY
+ /* Everything below here is for legacy driver, never use! */
+ /* private: */
+
+ int (*firstopen) (struct drm_device *);
+ void (*preclose) (struct drm_device *, struct drm_file *file_priv);
+ int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
+ int (*dma_quiescent) (struct drm_device *);
+ int (*context_dtor) (struct drm_device *dev, int context);
+ irqreturn_t (*irq_handler)(int irq, void *arg);
+ void (*irq_preinstall)(struct drm_device *dev);
+ int (*irq_postinstall)(struct drm_device *dev);
+ void (*irq_uninstall)(struct drm_device *dev);
+ u32 (*get_vblank_counter)(struct drm_device *dev, unsigned int pipe);
+ int (*enable_vblank)(struct drm_device *dev, unsigned int pipe);
+ void (*disable_vblank)(struct drm_device *dev, unsigned int pipe);
+ int dev_priv_size;
+#endif
+};
+
+void *__devm_drm_dev_alloc(struct device *parent,
+ const struct drm_driver *driver,
+ size_t size, size_t offset);
+
+/**
+ * devm_drm_dev_alloc - Resource managed allocation of a &drm_device instance
+ * @parent: Parent device object
+ * @driver: DRM driver
+ * @type: the type of the struct which contains struct &drm_device
+ * @member: the name of the &drm_device within @type.
+ *
+ * This allocates and initialize a new DRM device. No device registration is done.
+ * Call drm_dev_register() to advertice the device to user space and register it
+ * with other core subsystems. This should be done last in the device
+ * initialization sequence to make sure userspace can't access an inconsistent
+ * state.
+ *
+ * The initial ref-count of the object is 1. Use drm_dev_get() and
+ * drm_dev_put() to take and drop further ref-counts.
+ *
+ * It is recommended that drivers embed &struct drm_device into their own device
+ * structure.
+ *
+ * Note that this manages the lifetime of the resulting &drm_device
+ * automatically using devres. The DRM device initialized with this function is
+ * automatically put on driver detach using drm_dev_put().
+ *
+ * RETURNS:
+ * Pointer to new DRM device, or ERR_PTR on failure.
+ */
+#define devm_drm_dev_alloc(parent, driver, type, member) \
+ ((type *) __devm_drm_dev_alloc(parent, driver, sizeof(type), \
+ offsetof(type, member)))
+
+struct drm_device *drm_dev_alloc(const struct drm_driver *driver,
+ struct device *parent);
+int drm_dev_register(struct drm_device *dev, unsigned long flags);
+void drm_dev_unregister(struct drm_device *dev);
+
+void drm_dev_get(struct drm_device *dev);
+void drm_dev_put(struct drm_device *dev);
+void drm_put_dev(struct drm_device *dev);
+bool drm_dev_enter(struct drm_device *dev, int *idx);
+void drm_dev_exit(int idx);
+void drm_dev_unplug(struct drm_device *dev);
+
+/**
+ * drm_dev_is_unplugged - is a DRM device unplugged
+ * @dev: DRM device
+ *
+ * This function can be called to check whether a hotpluggable is unplugged.
+ * Unplugging itself is singalled through drm_dev_unplug(). If a device is
+ * unplugged, these two functions guarantee that any store before calling
+ * drm_dev_unplug() is visible to callers of this function after it completes
+ *
+ * WARNING: This function fundamentally races against drm_dev_unplug(). It is
+ * recommended that drivers instead use the underlying drm_dev_enter() and
+ * drm_dev_exit() function pairs.
+ */
+static inline bool drm_dev_is_unplugged(struct drm_device *dev)
+{
+ int idx;
+
+ if (drm_dev_enter(dev, &idx)) {
+ drm_dev_exit(idx);
+ return false;
+ }
+
+ return true;
+}
+
+/**
+ * drm_core_check_all_features - check driver feature flags mask
+ * @dev: DRM device to check
+ * @features: feature flag(s) mask
+ *
+ * This checks @dev for driver features, see &drm_driver.driver_features,
+ * &drm_device.driver_features, and the various &enum drm_driver_feature flags.
+ *
+ * Returns true if all features in the @features mask are supported, false
+ * otherwise.
+ */
+static inline bool drm_core_check_all_features(const struct drm_device *dev,
+ u32 features)
+{
+ u32 supported = dev->driver->driver_features & dev->driver_features;
+
+ return features && (supported & features) == features;
+}
+
+/**
+ * drm_core_check_feature - check driver feature flags
+ * @dev: DRM device to check
+ * @feature: feature flag
+ *
+ * This checks @dev for driver features, see &drm_driver.driver_features,
+ * &drm_device.driver_features, and the various &enum drm_driver_feature flags.
+ *
+ * Returns true if the @feature is supported, false otherwise.
+ */
+static inline bool drm_core_check_feature(const struct drm_device *dev,
+ enum drm_driver_feature feature)
+{
+ return drm_core_check_all_features(dev, feature);
+}
+
+/**
+ * drm_drv_uses_atomic_modeset - check if the driver implements
+ * atomic_commit()
+ * @dev: DRM device
+ *
+ * This check is useful if drivers do not have DRIVER_ATOMIC set but
+ * have atomic modesetting internally implemented.
+ */
+static inline bool drm_drv_uses_atomic_modeset(struct drm_device *dev)
+{
+ return drm_core_check_feature(dev, DRIVER_ATOMIC) ||
+ (dev->mode_config.funcs && dev->mode_config.funcs->atomic_commit != NULL);
+}
+
+
+int drm_dev_set_unique(struct drm_device *dev, const char *name);
+
+extern bool drm_firmware_drivers_only(void);
+
+#endif