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