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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 #include #include struct drm_file; struct drm_gem_object; struct drm_master; struct drm_minor; struct dma_buf_attachment; struct drm_display_mode; struct drm_mode_create_dumb; struct drm_printer; /** * 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 ` 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 the 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. * * New drivers can either use the drm_irq_install() and * drm_irq_uninstall() helper functions, or roll their own irq support * code by calling request_irq() directly. */ 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 drm_dev_init() 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. Drivers * using this callback are responsible for calling drm_dev_fini() * to finalize the device and then freeing the struct themselves. */ void (*release) (struct drm_device *); /** * @get_vblank_counter: * * Driver callback for fetching a raw hardware vblank counter for the * CRTC specified with the pipe argument. If a device doesn't have a * hardware counter, the driver can simply leave the hook as NULL. * The DRM core will account for missed vblank events while interrupts * where disabled based on system timestamps. * * Wraparound handling and loss of events due to modesetting is dealt * with in the DRM core code, as long as drivers call * drm_crtc_vblank_off() and drm_crtc_vblank_on() when disabling or * enabling a CRTC. * * This is deprecated and should not be used by new drivers. * Use &drm_crtc_funcs.get_vblank_counter instead. * * Returns: * * Raw vblank counter value. */ u32 (*get_vblank_counter) (struct drm_device *dev, unsigned int pipe); /** * @enable_vblank: * * Enable vblank interrupts for the CRTC specified with the pipe * argument. * * This is deprecated and should not be used by new drivers. * Use &drm_crtc_funcs.enable_vblank instead. * * Returns: * * Zero on success, appropriate errno if the given @crtc's vblank * interrupt cannot be enabled. */ int (*enable_vblank) (struct drm_device *dev, unsigned int pipe); /** * @disable_vblank: * * Disable vblank interrupts for the CRTC specified with the pipe * argument. * * This is deprecated and should not be used by new drivers. * Use &drm_crtc_funcs.disable_vblank instead. */ void (*disable_vblank) (struct drm_device *dev, unsigned int pipe); /** * @get_scanout_position: * * Called by vblank timestamping code. * * Returns the current display scanout position from a crtc, and an * optional accurate ktime_get() timestamp of when position was * measured. Note that this is a helper callback which is only used if a * driver uses drm_calc_vbltimestamp_from_scanoutpos() for the * @get_vblank_timestamp callback. * * Parameters: * * dev: * DRM device. * pipe: * Id of the crtc to query. * in_vblank_irq: * True when called from drm_crtc_handle_vblank(). Some drivers * need to apply some workarounds for gpu-specific vblank irq quirks * if flag is set. * vpos: * Target location for current vertical scanout position. * hpos: * Target location for current horizontal scanout position. * stime: * Target location for timestamp taken immediately before * scanout position query. Can be NULL to skip timestamp. * etime: * Target location for timestamp taken immediately after * scanout position query. Can be NULL to skip timestamp. * mode: * Current display timings. * * Returns vpos as a positive number while in active scanout area. * Returns vpos as a negative number inside vblank, counting the number * of scanlines to go until end of vblank, e.g., -1 means "one scanline * until start of active scanout / end of vblank." * * Returns: * * True on success, false if a reliable scanout position counter could * not be read out. * * FIXME: * * Since this is a helper to implement @get_vblank_timestamp, we should * move it to &struct drm_crtc_helper_funcs, like all the other * helper-internal hooks. */ bool (*get_scanout_position) (struct drm_device *dev, unsigned int pipe, bool in_vblank_irq, int *vpos, int *hpos, ktime_t *stime, ktime_t *etime, const struct drm_display_mode *mode); /** * @get_vblank_timestamp: * * Called by drm_get_last_vbltimestamp(). Should return a precise * timestamp when the most recent VBLANK interval ended or will end. * * Specifically, the timestamp in @vblank_time should correspond as * closely as possible to the time when the first video scanline of * the video frame after the end of VBLANK will start scanning out, * the time immediately after end of the VBLANK interval. If the * @crtc is currently inside VBLANK, this will be a time in the future. * If the @crtc is currently scanning out a frame, this will be the * past start time of the current scanout. This is meant to adhere * to the OpenML OML_sync_control extension specification. * * Paramters: * * dev: * dev DRM device handle. * pipe: * crtc for which timestamp should be returned. * max_error: * Maximum allowable timestamp error in nanoseconds. * Implementation should strive to provide timestamp * with an error of at most max_error nanoseconds. * Returns true upper bound on error for timestamp. * vblank_time: * Target location for returned vblank timestamp. * in_vblank_irq: * True when called from drm_crtc_handle_vblank(). Some drivers * need to apply some workarounds for gpu-specific vblank irq quirks * if flag is set. * * Returns: * * True on success, false on failure, which means the core should * fallback to a simple timestamp taken in drm_crtc_handle_vblank(). * * FIXME: * * We should move this hook to &struct drm_crtc_funcs like all the other * vblank hooks. */ bool (*get_vblank_timestamp) (struct drm_device *dev, unsigned int pipe, int *max_error, ktime_t *vblank_time, bool in_vblank_irq); /** * @irq_handler: * * Interrupt handler called when using drm_irq_install(). Not used by * drivers which implement their own interrupt handling. */ irqreturn_t(*irq_handler) (int irq, void *arg); /** * @irq_preinstall: * * Optional callback used by drm_irq_install() which is called before * the interrupt handler is registered. This should be used to clear out * any pending interrupts (from e.g. firmware based drives) and reset * the interrupt handling registers. */ void (*irq_preinstall) (struct drm_device *dev); /** * @irq_postinstall: * * Optional callback used by drm_irq_install() which is called after * the interrupt handler is registered. This should be used to enable * interrupt generation in the hardware. */ int (*irq_postinstall) (struct drm_device *dev); /** * @irq_uninstall: * * Optional callback used by drm_irq_uninstall() which is called before * the interrupt handler is unregistered. This should be used to disable * interrupt generation in the hardware. */ void (*irq_uninstall) (struct drm_device *dev); /** * @master_create: * * Called whenever a new master is created. Only used by vmwgfx. */ int (*master_create)(struct drm_device *dev, struct drm_master *master); /** * @master_destroy: * * Called whenever a master is destroyed. Only used by vmwgfx. */ void (*master_destroy)(struct drm_device *dev, struct drm_master *master); /** * @master_set: * * Called whenever the minor master is set. Only used by vmwgfx. */ int (*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. */ int (*debugfs_init)(struct drm_minor *minor); /** * @gem_free_object: deconstructor for drm_gem_objects * * This is deprecated and should not be used by new drivers. Use * &drm_gem_object_funcs.free instead. */ void (*gem_free_object) (struct drm_gem_object *obj); /** * @gem_free_object_unlocked: deconstructor for drm_gem_objects * * This is deprecated and should not be used by new drivers. Use * &drm_gem_object_funcs.free instead. * Compared to @gem_free_object this is not encumbered with * &drm_device.struct_mutex legacy locking schemes. */ void (*gem_free_object_unlocked) (struct drm_gem_object *obj); /** * @gem_open_object: * * This callback is deprecated in favour of &drm_gem_object_funcs.open. * * Driver hook called upon gem handle creation */ int (*gem_open_object) (struct drm_gem_object *, struct drm_file *); /** * @gem_close_object: * * This callback is deprecated in favour of &drm_gem_object_funcs.close. * * Driver hook called upon gem handle release */ void (*gem_close_object) (struct drm_gem_object *, struct drm_file *); /** * @gem_print_info: * * This callback is deprecated in favour of * &drm_gem_object_funcs.print_info. * * If driver subclasses struct &drm_gem_object, it can implement this * optional hook for printing additional driver specific info. * * drm_printf_indent() should be used in the callback passing it the * indent argument. * * This callback is called from drm_gem_print_info(). */ void (*gem_print_info)(struct drm_printer *p, unsigned int indent, const struct drm_gem_object *obj); /** * @gem_create_object: constructor for gem objects * * Hook for allocating the GEM object struct, for use by the CMA and * SHMEM GEM helpers. */ 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 `. */ 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 `. */ int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv, int prime_fd, uint32_t *handle); /** * @gem_prime_export: * * Export hook for GEM drivers. Deprecated in favour of * &drm_gem_object_funcs.export. */ struct dma_buf * (*gem_prime_export)(struct drm_gem_object *obj, int flags); /** * @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_pin: * * Deprecated hook in favour of &drm_gem_object_funcs.pin. */ int (*gem_prime_pin)(struct drm_gem_object *obj); /** * @gem_prime_unpin: * * Deprecated hook in favour of &drm_gem_object_funcs.unpin. */ void (*gem_prime_unpin)(struct drm_gem_object *obj); /** * @gem_prime_get_sg_table: * * Deprecated hook in favour of &drm_gem_object_funcs.get_sg_table. */ struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj); /** * @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_vmap: * * Deprecated vmap hook for GEM drivers. Please use * &drm_gem_object_funcs.vmap instead. */ void *(*gem_prime_vmap)(struct drm_gem_object *obj); /** * @gem_prime_vunmap: * * Deprecated vunmap hook for GEM drivers. Please use * &drm_gem_object_funcs.vunmap instead. */ void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr); /** * @gem_prime_mmap: * * mmap hook for GEM drivers, used to implement dma-buf mmap in the * PRIME helpers. * * FIXME: There's way too much duplication going on here, and also moved * to &drm_gem_object_funcs. */ 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); /** * @gem_vm_ops: Driver private ops for this object * * For GEM drivers this is deprecated in favour of * &drm_gem_object_funcs.vm_ops. */ const struct vm_operations_struct *gem_vm_ops; /** @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` 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` for in-depth coverage and * some examples. */ const struct file_operations *fops; /* Everything below here is for legacy driver, never use! */ /* private: */ /* List of devices hanging off this driver with stealth attach. */ struct list_head legacy_dev_list; 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); int dev_priv_size; }; extern unsigned int drm_debug; int drm_dev_init(struct drm_device *dev, struct drm_driver *driver, struct device *parent); int devm_drm_dev_init(struct device *parent, struct drm_device *dev, struct drm_driver *driver); void drm_dev_fini(struct drm_device *dev); struct drm_device *drm_dev_alloc(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_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, u32 feature) { return dev->driver->driver_features & dev->driver_features & 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); #endif