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- #ifndef _DRM_DEVICE_H_
- #define _DRM_DEVICE_H_
- #include <linux/list.h>
- #include <linux/kref.h>
- #include <linux/mutex.h>
- #include <linux/idr.h>
- #include <drm/drm_legacy.h>
- #include <drm/drm_mode_config.h>
- struct drm_driver;
- struct drm_minor;
- struct drm_master;
- struct drm_vblank_crtc;
- struct drm_vma_offset_manager;
- struct drm_vram_mm;
- struct drm_fb_helper;
- struct inode;
- struct pci_dev;
- struct pci_controller;
- /**
- * enum switch_power_state - power state of drm device
- */
- enum switch_power_state {
- /** @DRM_SWITCH_POWER_ON: Power state is ON */
- DRM_SWITCH_POWER_ON = 0,
- /** @DRM_SWITCH_POWER_OFF: Power state is OFF */
- DRM_SWITCH_POWER_OFF = 1,
- /** @DRM_SWITCH_POWER_CHANGING: Power state is changing */
- DRM_SWITCH_POWER_CHANGING = 2,
- /** @DRM_SWITCH_POWER_DYNAMIC_OFF: Suspended */
- DRM_SWITCH_POWER_DYNAMIC_OFF = 3,
- };
- /**
- * struct drm_device - DRM device structure
- *
- * This structure represent a complete card that
- * may contain multiple heads.
- */
- struct drm_device {
- /** @if_version: Highest interface version set */
- int if_version;
- /** @ref: Object ref-count */
- struct kref ref;
- /** @dev: Device structure of bus-device */
- struct device *dev;
- /**
- * @managed:
- *
- * Managed resources linked to the lifetime of this &drm_device as
- * tracked by @ref.
- */
- struct {
- /** @managed.resources: managed resources list */
- struct list_head resources;
- /** @managed.final_kfree: pointer for final kfree() call */
- void *final_kfree;
- /** @managed.lock: protects @managed.resources */
- spinlock_t lock;
- } managed;
- /** @driver: DRM driver managing the device */
- const struct drm_driver *driver;
- /**
- * @dev_private:
- *
- * DRM driver private data. This is deprecated and should be left set to
- * NULL.
- *
- * Instead of using this pointer it is recommended that drivers use
- * devm_drm_dev_alloc() and embed struct &drm_device in their larger
- * per-device structure.
- */
- void *dev_private;
- /** @primary: Primary node */
- struct drm_minor *primary;
- /** @render: Render node */
- struct drm_minor *render;
- /**
- * @registered:
- *
- * Internally used by drm_dev_register() and drm_connector_register().
- */
- bool registered;
- /**
- * @master:
- *
- * Currently active master for this device.
- * Protected by &master_mutex
- */
- struct drm_master *master;
- /**
- * @driver_features: per-device driver features
- *
- * Drivers can clear specific flags here to disallow
- * certain features on a per-device basis while still
- * sharing a single &struct drm_driver instance across
- * all devices.
- */
- u32 driver_features;
- /**
- * @unplugged:
- *
- * Flag to tell if the device has been unplugged.
- * See drm_dev_enter() and drm_dev_is_unplugged().
- */
- bool unplugged;
- /** @anon_inode: inode for private address-space */
- struct inode *anon_inode;
- /** @unique: Unique name of the device */
- char *unique;
- /**
- * @struct_mutex:
- *
- * Lock for others (not &drm_minor.master and &drm_file.is_master)
- *
- * WARNING:
- * Only drivers annotated with DRIVER_LEGACY should be using this.
- */
- struct mutex struct_mutex;
- /**
- * @master_mutex:
- *
- * Lock for &drm_minor.master and &drm_file.is_master
- */
- struct mutex master_mutex;
- /**
- * @open_count:
- *
- * Usage counter for outstanding files open,
- * protected by drm_global_mutex
- */
- atomic_t open_count;
- /** @filelist_mutex: Protects @filelist. */
- struct mutex filelist_mutex;
- /**
- * @filelist:
- *
- * List of userspace clients, linked through &drm_file.lhead.
- */
- struct list_head filelist;
- /**
- * @filelist_internal:
- *
- * List of open DRM files for in-kernel clients.
- * Protected by &filelist_mutex.
- */
- struct list_head filelist_internal;
- /**
- * @clientlist_mutex:
- *
- * Protects &clientlist access.
- */
- struct mutex clientlist_mutex;
- /**
- * @clientlist:
- *
- * List of in-kernel clients. Protected by &clientlist_mutex.
- */
- struct list_head clientlist;
- /**
- * @vblank_disable_immediate:
- *
- * If true, vblank interrupt will be disabled immediately when the
- * refcount drops to zero, as opposed to via the vblank disable
- * timer.
- *
- * This can be set to true it the hardware has a working vblank counter
- * with high-precision timestamping (otherwise there are races) and the
- * driver uses drm_crtc_vblank_on() and drm_crtc_vblank_off()
- * appropriately. See also @max_vblank_count and
- * &drm_crtc_funcs.get_vblank_counter.
- */
- bool vblank_disable_immediate;
- /**
- * @vblank:
- *
- * Array of vblank tracking structures, one per &struct drm_crtc. For
- * historical reasons (vblank support predates kernel modesetting) this
- * is free-standing and not part of &struct drm_crtc itself. It must be
- * initialized explicitly by calling drm_vblank_init().
- */
- struct drm_vblank_crtc *vblank;
- /**
- * @vblank_time_lock:
- *
- * Protects vblank count and time updates during vblank enable/disable
- */
- spinlock_t vblank_time_lock;
- /**
- * @vbl_lock: Top-level vblank references lock, wraps the low-level
- * @vblank_time_lock.
- */
- spinlock_t vbl_lock;
- /**
- * @max_vblank_count:
- *
- * Maximum value of the vblank registers. This value +1 will result in a
- * wrap-around of the vblank register. It is used by the vblank core to
- * handle wrap-arounds.
- *
- * If set to zero the vblank core will try to guess the elapsed vblanks
- * between times when the vblank interrupt is disabled through
- * high-precision timestamps. That approach is suffering from small
- * races and imprecision over longer time periods, hence exposing a
- * hardware vblank counter is always recommended.
- *
- * This is the statically configured device wide maximum. The driver
- * can instead choose to use a runtime configurable per-crtc value
- * &drm_vblank_crtc.max_vblank_count, in which case @max_vblank_count
- * must be left at zero. See drm_crtc_set_max_vblank_count() on how
- * to use the per-crtc value.
- *
- * If non-zero, &drm_crtc_funcs.get_vblank_counter must be set.
- */
- u32 max_vblank_count;
- /** @vblank_event_list: List of vblank events */
- struct list_head vblank_event_list;
- /**
- * @event_lock:
- *
- * Protects @vblank_event_list and event delivery in
- * general. See drm_send_event() and drm_send_event_locked().
- */
- spinlock_t event_lock;
- /** @num_crtcs: Number of CRTCs on this device */
- unsigned int num_crtcs;
- /** @mode_config: Current mode config */
- struct drm_mode_config mode_config;
- /** @object_name_lock: GEM information */
- struct mutex object_name_lock;
- /** @object_name_idr: GEM information */
- struct idr object_name_idr;
- /** @vma_offset_manager: GEM information */
- struct drm_vma_offset_manager *vma_offset_manager;
- /** @vram_mm: VRAM MM memory manager */
- struct drm_vram_mm *vram_mm;
- /**
- * @switch_power_state:
- *
- * Power state of the client.
- * Used by drivers supporting the switcheroo driver.
- * The state is maintained in the
- * &vga_switcheroo_client_ops.set_gpu_state callback
- */
- enum switch_power_state switch_power_state;
- /**
- * @fb_helper:
- *
- * Pointer to the fbdev emulation structure.
- * Set by drm_fb_helper_init() and cleared by drm_fb_helper_fini().
- */
- struct drm_fb_helper *fb_helper;
- /* Everything below here is for legacy driver, never use! */
- /* private: */
- #if IS_ENABLED(CONFIG_DRM_LEGACY)
- /* List of devices per driver for stealth attach cleanup */
- struct list_head legacy_dev_list;
- #ifdef __alpha__
- /** @hose: PCI hose, only used on ALPHA platforms. */
- struct pci_controller *hose;
- #endif
- /* AGP data */
- struct drm_agp_head *agp;
- /* Context handle management - linked list of context handles */
- struct list_head ctxlist;
- /* Context handle management - mutex for &ctxlist */
- struct mutex ctxlist_mutex;
- /* Context handle management */
- struct idr ctx_idr;
- /* Memory management - linked list of regions */
- struct list_head maplist;
- /* Memory management - user token hash table for maps */
- struct drm_open_hash map_hash;
- /* Context handle management - list of vmas (for debugging) */
- struct list_head vmalist;
- /* Optional pointer for DMA support */
- struct drm_device_dma *dma;
- /* Context swapping flag */
- __volatile__ long context_flag;
- /* Last current context */
- int last_context;
- /* Lock for &buf_use and a few other things. */
- spinlock_t buf_lock;
- /* Usage counter for buffers in use -- cannot alloc */
- int buf_use;
- /* Buffer allocation in progress */
- atomic_t buf_alloc;
- struct {
- int context;
- struct drm_hw_lock *lock;
- } sigdata;
- struct drm_local_map *agp_buffer_map;
- unsigned int agp_buffer_token;
- /* Scatter gather memory */
- struct drm_sg_mem *sg;
- /* IRQs */
- bool irq_enabled;
- int irq;
- #endif
- };
- #endif
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