linux/include/drm/drm_device.h

333 lines
7.3 KiB
C

#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_hashtab.h>
#include <drm/drm_mode_config.h>
struct drm_driver;
struct drm_minor;
struct drm_master;
struct drm_device_dma;
struct drm_vblank_crtc;
struct drm_sg_mem;
struct drm_local_map;
struct drm_vma_offset_manager;
struct drm_fb_helper;
struct inode;
struct pci_dev;
struct pci_controller;
/**
* enum drm_switch_power - 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 {
/**
* @legacy_dev_list:
*
* List of devices per driver for stealth attach cleanup
*/
struct list_head legacy_dev_list;
/** @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;
/** @driver: DRM driver managing the device */
struct drm_driver *driver;
/** @dev_private: DRM driver private data */
void *dev_private;
/** @primary: Primary node */
struct drm_minor *primary;
/** @render: Render node */
struct drm_minor *render;
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)
*/
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
*/
int open_count;
/** @buf_lock: Lock for &buf_use and a few other things. */
spinlock_t buf_lock;
/** @buf_use: Usage counter for buffers in use -- cannot alloc */
int buf_use;
/** @buf_alloc: Buffer allocation in progress */
atomic_t buf_alloc;
struct mutex filelist_mutex;
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;
/** @maplist: Memory management - linked list of regions */
struct list_head maplist;
/** @map_hash: Memory management - user token hash table for maps */
struct drm_open_hash map_hash;
/**
* @ctxlist:
* Context handle management - linked list of context handles
*/
struct list_head ctxlist;
/**
* @ctxlist_mutex:
*
* Context handle management - mutex for &ctxlist
*/
struct mutex ctxlist_mutex;
/**
* @ctx_idr:
* Context handle management
*/
struct idr ctx_idr;
/**
* @vmalist:
* Context handle management - list of vmas (for debugging)
*/
struct list_head vmalist;
/** @dma: Optional pointer for DMA support */
struct drm_device_dma *dma;
/** @context_flag: Context swapping flag */
__volatile__ long context_flag;
/** @last_context: Last current context */
int last_context;
/**
* @irq_enabled:
*
* Indicates that interrupt handling is enabled, specifically vblank
* handling. Drivers which don't use drm_irq_install() need to set this
* to true manually.
*/
bool irq_enabled;
int irq;
/**
* @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;
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.
*
* If non-zeor, &drm_crtc_funcs.get_vblank_counter must be set.
*/
/** @max_vblank_count: Size of vblank counter register */
u32 max_vblank_count;
/** @vblank_event_list: List of vblank events */
struct list_head vblank_event_list;
spinlock_t event_lock;
/** @agp: AGP data */
struct drm_agp_head *agp;
/** @pdev: PCI device structure */
struct pci_dev *pdev;
#ifdef __alpha__
struct pci_controller *hose;
#endif
/** @sg: Scatter gather memory */
struct drm_sg_mem *sg;
/** @num_crtcs: Number of CRTCs on this device */
unsigned int num_crtcs;
struct {
int context;
struct drm_hw_lock *lock;
} sigdata;
struct drm_local_map *agp_buffer_map;
unsigned int agp_buffer_token;
/** @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;
/**
* @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;
};
#endif