233 lines
6.2 KiB
C
233 lines
6.2 KiB
C
#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_hashtab.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_device_dma;
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struct drm_vblank_crtc;
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struct drm_sg_mem;
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struct drm_local_map;
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struct drm_vma_offset_manager;
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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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* DRM device structure. 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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struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
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int if_version; /**< Highest interface version set */
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/** \name Lifetime Management */
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/*@{ */
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struct kref ref; /**< Object ref-count */
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struct device *dev; /**< Device structure of bus-device */
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struct drm_driver *driver; /**< DRM driver managing the device */
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void *dev_private; /**< DRM driver private data */
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struct drm_minor *primary; /**< Primary node */
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struct drm_minor *render; /**< Render node */
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bool registered;
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/* currently active master for this device. Protected by master_mutex */
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struct drm_master *master;
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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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struct inode *anon_inode; /**< inode for private address-space */
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char *unique; /**< unique name of the device */
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/*@} */
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/** \name Locks */
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/*@{ */
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struct mutex struct_mutex; /**< For others */
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struct mutex master_mutex; /**< For drm_minor::master and drm_file::is_master */
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/*@} */
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/** \name Usage Counters */
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/*@{ */
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int open_count; /**< Outstanding files open, protected by drm_global_mutex. */
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spinlock_t buf_lock; /**< For drm_device::buf_use and a few other things. */
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int buf_use; /**< Buffers in use -- cannot alloc */
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atomic_t buf_alloc; /**< Buffer allocation in progress */
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/*@} */
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struct mutex filelist_mutex;
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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. 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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/** \name Memory management */
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/*@{ */
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struct list_head maplist; /**< Linked list of regions */
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struct drm_open_hash map_hash; /**< User token hash table for maps */
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/** \name Context handle management */
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/*@{ */
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struct list_head ctxlist; /**< Linked list of context handles */
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struct mutex ctxlist_mutex; /**< For ctxlist */
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struct idr ctx_idr;
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struct list_head vmalist; /**< List of vmas (for debugging) */
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/*@} */
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/** \name DMA support */
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/*@{ */
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struct drm_device_dma *dma; /**< Optional pointer for DMA support */
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/*@} */
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/** \name Context support */
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/*@{ */
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__volatile__ long context_flag; /**< Context swapping flag */
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int last_context; /**< Last current context */
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/*@} */
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/**
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* @irq_enabled:
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*
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* Indicates that interrupt handling is enabled, specifically vblank
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* handling. Drivers which don't use drm_irq_install() need to set this
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* to true manually.
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*/
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bool irq_enabled;
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int irq;
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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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spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
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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; /**< size of vblank counter register */
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/**
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* List of events
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*/
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struct list_head vblank_event_list;
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spinlock_t event_lock;
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/*@} */
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struct drm_agp_head *agp; /**< AGP data */
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struct pci_dev *pdev; /**< PCI device structure */
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#ifdef __alpha__
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struct pci_controller *hose;
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#endif
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struct drm_sg_mem *sg; /**< Scatter gather memory */
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unsigned int num_crtcs; /**< Number of CRTCs on this device */
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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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struct drm_mode_config mode_config; /**< Current mode config */
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/** \name GEM information */
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/*@{ */
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struct mutex object_name_lock;
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struct idr object_name_idr;
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struct drm_vma_offset_manager *vma_offset_manager;
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/*@} */
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int 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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#endif
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