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