drivers/gpu/drm/i915/intel_ringbuffer.h

   1 #ifndef _INTEL_RINGBUFFER_H_
   2 #define _INTEL_RINGBUFFER_H_
   3
   4 struct  intel_hw_status_page {
   5         void            *page_addr;
   6         unsigned int    gfx_addr;
   7         struct          drm_gem_object *obj;
   8 };
   9
  10 struct drm_i915_gem_execbuffer2;
  11 struct  intel_ring_buffer {
  12         const char      *name;
  13         struct          ring_regs {
  14                         u32 ctl;
  15                         u32 head;
  16                         u32 tail;
  17                         u32 start;
  18         } regs;
  19         unsigned int    ring_flag;
  20         unsigned long   size;
  21         unsigned int    alignment;
  22         void            *virtual_start;
  23         struct          drm_device *dev;
  24         struct          drm_gem_object *gem_object;
  25
  26         unsigned int    head;
  27         unsigned int    tail;
  28         unsigned int    space;
  29         u32             next_seqno;
  30         struct intel_hw_status_page status_page;
  31
  32         u32             irq_gem_seqno;          /* last seq seem at irq time */
  33         u32             waiting_gem_seqno;
  34         int             user_irq_refcount;
  35         void            (*user_irq_get)(struct drm_device *dev,
  36                         struct intel_ring_buffer *ring);
  37         void            (*user_irq_put)(struct drm_device *dev,
  38                         struct intel_ring_buffer *ring);
  39         void            (*setup_status_page)(struct drm_device *dev,
  40                         struct  intel_ring_buffer *ring);
  41
  42         int             (*init)(struct drm_device *dev,
  43                         struct intel_ring_buffer *ring);
  44
  45         unsigned int    (*get_head)(struct drm_device *dev,
  46                         struct intel_ring_buffer *ring);
  47         unsigned int    (*get_tail)(struct drm_device *dev,
  48                         struct intel_ring_buffer *ring);
  49         unsigned int    (*get_active_head)(struct drm_device *dev,
  50                         struct intel_ring_buffer *ring);
  51         void            (*advance_ring)(struct drm_device *dev,
  52                         struct intel_ring_buffer *ring);
  53         void            (*flush)(struct drm_device *dev,
  54                         struct intel_ring_buffer *ring,
  55                         u32     invalidate_domains,
  56                         u32     flush_domains);
  57         u32             (*add_request)(struct drm_device *dev,
  58                         struct intel_ring_buffer *ring,
  59                         struct drm_file *file_priv,
  60                         u32 flush_domains);
  61         u32             (*get_gem_seqno)(struct drm_device *dev,
  62                         struct intel_ring_buffer *ring);
  63         int             (*dispatch_gem_execbuffer)(struct drm_device *dev,
  64                         struct intel_ring_buffer *ring,
  65                         struct drm_i915_gem_execbuffer2 *exec,
  66                         struct drm_clip_rect *cliprects,
  67                         uint64_t exec_offset);
  68
  69         /**
  70          * List of objects currently involved in rendering from the
  71          * ringbuffer.
  72          *
  73          * Includes buffers having the contents of their GPU caches
  74          * flushed, not necessarily primitives.  last_rendering_seqno
  75          * represents when the rendering involved will be completed.
  76          *
  77          * A reference is held on the buffer while on this list.
  78          */
  79         struct list_head active_list;
  80
  81         /**
  82          * List of breadcrumbs associated with GPU requests currently
  83          * outstanding.
  84          */
  85         struct list_head request_list;
  86
  87         wait_queue_head_t irq_queue;
  88         drm_local_map_t map;
  89 };
  90
  91 static inline u32
  92 intel_read_status_page(struct intel_ring_buffer *ring,
  93                 int reg)
  94 {
  95         u32 *regs = ring->status_page.page_addr;
  96         return regs[reg];
  97 }
  98
  99 int intel_init_ring_buffer(struct drm_device *dev,
 100                 struct intel_ring_buffer *ring);
 101 void intel_cleanup_ring_buffer(struct drm_device *dev,
 102                 struct intel_ring_buffer *ring);
 103 int intel_wait_ring_buffer(struct drm_device *dev,
 104                 struct intel_ring_buffer *ring, int n);
 105 int intel_wrap_ring_buffer(struct drm_device *dev,
 106                 struct intel_ring_buffer *ring);
 107 void intel_ring_begin(struct drm_device *dev,
 108                 struct intel_ring_buffer *ring, int n);
 109 void intel_ring_emit(struct drm_device *dev,
 110                 struct intel_ring_buffer *ring, u32 data);
 111 void intel_fill_struct(struct drm_device *dev,
 112                 struct intel_ring_buffer *ring,
 113                 void *data,
 114                 unsigned int len);
 115 void intel_ring_advance(struct drm_device *dev,
 116                 struct intel_ring_buffer *ring);
 117
 118 u32 intel_ring_get_seqno(struct drm_device *dev,
 119                 struct intel_ring_buffer *ring);
 120
 121 extern struct intel_ring_buffer render_ring;
 122 extern struct intel_ring_buffer bsd_ring;
 123
 124 #endif /* _INTEL_RINGBUFFER_H_ */