include/drm/drm_device.h

   1 #ifndef _DRM_DEVICE_H_
   2 #define _DRM_DEVICE_H_
   3
   4 #include <linux/list.h>
   5 #include <linux/kref.h>
   6 #include <linux/mutex.h>
   7 #include <linux/idr.h>
   8
   9 #include <drm/drm_hashtab.h>
  10 #include <drm/drm_mode_config.h>
  11
  12 struct drm_driver;
  13 struct drm_minor;
  14 struct drm_master;
  15 struct drm_device_dma;
  16 struct drm_vblank_crtc;
  17 struct drm_sg_mem;
  18 struct drm_local_map;
  19 struct drm_vma_offset_manager;
  20 struct drm_fb_helper;
  21
  22 struct inode;
  23
  24 struct pci_dev;
  25 struct pci_controller;
  26
  27 /**
  28  * DRM device structure. This structure represent a complete card that
  29  * may contain multiple heads.
  30  */
  31 struct drm_device {
  32         struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
  33         int if_version;                 /**< Highest interface version set */
  34
  35         /** \name Lifetime Management */
  36         /*@{ */
  37         struct kref ref;                /**< Object ref-count */
  38         struct device *dev;             /**< Device structure of bus-device */
  39         struct drm_driver *driver;      /**< DRM driver managing the device */
  40         void *dev_private;              /**< DRM driver private data */
  41         struct drm_minor *control;              /**< Control node */
  42         struct drm_minor *primary;              /**< Primary node */
  43         struct drm_minor *render;               /**< Render node */
  44         bool registered;
  45
  46         /* currently active master for this device. Protected by master_mutex */
  47         struct drm_master *master;
  48
  49         /**
  50          * @unplugged:
  51          *
  52          * Flag to tell if the device has been unplugged.
  53          * See drm_dev_enter() and drm_dev_is_unplugged().
  54          */
  55         bool unplugged;
  56
  57         struct inode *anon_inode;               /**< inode for private address-space */
  58         char *unique;                           /**< unique name of the device */
  59         /*@} */
  60
  61         /** \name Locks */
  62         /*@{ */
  63         struct mutex struct_mutex;      /**< For others */
  64         struct mutex master_mutex;      /**< For drm_minor::master and drm_file::is_master */
  65         /*@} */
  66
  67         /** \name Usage Counters */
  68         /*@{ */
  69         int open_count;                 /**< Outstanding files open, protected by drm_global_mutex. */
  70         spinlock_t buf_lock;            /**< For drm_device::buf_use and a few other things. */
  71         int buf_use;                    /**< Buffers in use -- cannot alloc */
  72         atomic_t buf_alloc;             /**< Buffer allocation in progress */
  73         /*@} */
  74
  75         struct mutex filelist_mutex;
  76         struct list_head filelist;
  77
  78         /** \name Memory management */
  79         /*@{ */
  80         struct list_head maplist;       /**< Linked list of regions */
  81         struct drm_open_hash map_hash;  /**< User token hash table for maps */
  82
  83         /** \name Context handle management */
  84         /*@{ */
  85         struct list_head ctxlist;       /**< Linked list of context handles */
  86         struct mutex ctxlist_mutex;     /**< For ctxlist */
  87
  88         struct idr ctx_idr;
  89
  90         struct list_head vmalist;       /**< List of vmas (for debugging) */
  91
  92         /*@} */
  93
  94         /** \name DMA support */
  95         /*@{ */
  96         struct drm_device_dma *dma;             /**< Optional pointer for DMA support */
  97         /*@} */
  98
  99         /** \name Context support */
 100         /*@{ */
 101
 102         __volatile__ long context_flag; /**< Context swapping flag */
 103         int last_context;               /**< Last current context */
 104         /*@} */
 105
 106         /**
 107          * @irq_enabled:
 108          *
 109          * Indicates that interrupt handling is enabled, specifically vblank
 110          * handling. Drivers which don't use drm_irq_install() need to set this
 111          * to true manually.
 112          */
 113         bool irq_enabled;
 114         int irq;
 115
 116         /**
 117          * @vblank_disable_immediate:
 118          *
 119          * If true, vblank interrupt will be disabled immediately when the
 120          * refcount drops to zero, as opposed to via the vblank disable
 121          * timer.
 122          *
 123          * This can be set to true it the hardware has a working vblank counter
 124          * with high-precision timestamping (otherwise there are races) and the
 125          * driver uses drm_crtc_vblank_on() and drm_crtc_vblank_off()
 126          * appropriately. See also @max_vblank_count and
 127          * &drm_crtc_funcs.get_vblank_counter.
 128          */
 129         bool vblank_disable_immediate;
 130
 131         /**
 132          * @vblank:
 133          *
 134          * Array of vblank tracking structures, one per &struct drm_crtc. For
 135          * historical reasons (vblank support predates kernel modesetting) this
 136          * is free-standing and not part of &struct drm_crtc itself. It must be
 137          * initialized explicitly by calling drm_vblank_init().
 138          */
 139         struct drm_vblank_crtc *vblank;
 140
 141         spinlock_t vblank_time_lock;    /**< Protects vblank count and time updates during vblank enable/disable */
 142         spinlock_t vbl_lock;
 143
 144         /**
 145          * @max_vblank_count:
 146          *
 147          * Maximum value of the vblank registers. This value +1 will result in a
 148          * wrap-around of the vblank register. It is used by the vblank core to
 149          * handle wrap-arounds.
 150          *
 151          * If set to zero the vblank core will try to guess the elapsed vblanks
 152          * between times when the vblank interrupt is disabled through
 153          * high-precision timestamps. That approach is suffering from small
 154          * races and imprecision over longer time periods, hence exposing a
 155          * hardware vblank counter is always recommended.
 156          *
 157          * If non-zeor, &drm_crtc_funcs.get_vblank_counter must be set.
 158          */
 159         u32 max_vblank_count;           /**< size of vblank counter register */
 160
 161         /**
 162          * List of events
 163          */
 164         struct list_head vblank_event_list;
 165         spinlock_t event_lock;
 166
 167         /*@} */
 168
 169         struct drm_agp_head *agp;       /**< AGP data */
 170
 171         struct pci_dev *pdev;           /**< PCI device structure */
 172 #ifdef __alpha__
 173         struct pci_controller *hose;
 174 #endif
 175
 176         struct drm_sg_mem *sg;  /**< Scatter gather memory */
 177         unsigned int num_crtcs;                  /**< Number of CRTCs on this device */
 178
 179         struct {
 180                 int context;
 181                 struct drm_hw_lock *lock;
 182         } sigdata;
 183
 184         struct drm_local_map *agp_buffer_map;
 185         unsigned int agp_buffer_token;
 186
 187         struct drm_mode_config mode_config;     /**< Current mode config */
 188
 189         /** \name GEM information */
 190         /*@{ */
 191         struct mutex object_name_lock;
 192         struct idr object_name_idr;
 193         struct drm_vma_offset_manager *vma_offset_manager;
 194         /*@} */
 195         int switch_power_state;
 196
 197         /**
 198          * @fb_helper:
 199          *
 200          * Pointer to the fbdev emulation structure.
 201          * Set by drm_fb_helper_init() and cleared by drm_fb_helper_fini().
 202          */
 203         struct drm_fb_helper *fb_helper;
 204 };
 205
 206 #endif