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         struct intel_hw_status_page status_page;
  30
  31         u32             irq_gem_seqno;          /* last seq seem at irq time */
  32         u32             waiting_gem_seqno;
  33         int             user_irq_refcount;
  34         void            (*user_irq_get)(struct drm_device *dev,
  35                         struct intel_ring_buffer *ring);
  36         void            (*user_irq_put)(struct drm_device *dev,
  37                         struct intel_ring_buffer *ring);
  38         void            (*setup_status_page)(struct drm_device *dev,
  39                         struct  intel_ring_buffer *ring);
  40
  41         int             (*init)(struct drm_device *dev,
  42                         struct intel_ring_buffer *ring);
  43
  44         unsigned int    (*get_head)(struct drm_device *dev,
  45                         struct intel_ring_buffer *ring);
  46         unsigned int    (*get_tail)(struct drm_device *dev,
  47                         struct intel_ring_buffer *ring);
  48         unsigned int    (*get_active_head)(struct drm_device *dev,
  49                         struct intel_ring_buffer *ring);
  50         void            (*advance_ring)(struct drm_device *dev,
  51                         struct intel_ring_buffer *ring);
  52         void            (*flush)(struct drm_device *dev,
  53                         struct intel_ring_buffer *ring,
  54                         u32     invalidate_domains,
  55                         u32     flush_domains);
  56         u32             (*add_request)(struct drm_device *dev,
  57                         struct intel_ring_buffer *ring,
  58                         struct drm_file *file_priv,
  59                         u32 flush_domains);
  60         u32             (*get_gem_seqno)(struct drm_device *dev,
  61                         struct intel_ring_buffer *ring);
  62         int             (*dispatch_gem_execbuffer)(struct drm_device *dev,
  63                         struct intel_ring_buffer *ring,
  64                         struct drm_i915_gem_execbuffer2 *exec,
  65                         struct drm_clip_rect *cliprects,
  66                         uint64_t exec_offset);
  67
  68         /**
  69          * List of objects currently involved in rendering from the
  70          * ringbuffer.
  71          *
  72          * Includes buffers having the contents of their GPU caches
  73          * flushed, not necessarily primitives.  last_rendering_seqno
  74          * represents when the rendering involved will be completed.
  75          *
  76          * A reference is held on the buffer while on this list.
  77          */
  78         struct list_head active_list;
  79
  80         /**
  81          * List of breadcrumbs associated with GPU requests currently
  82          * outstanding.
  83          */
  84         struct list_head request_list;
  85
  86         /**
  87          * Do we have some not yet emitted requests outstanding?
  88          */
  89         bool outstanding_lazy_request;
  90
  91         wait_queue_head_t irq_queue;
  92         drm_local_map_t map;
  93 };
  94
  95 static inline u32
  96 intel_read_status_page(struct intel_ring_buffer *ring,
  97                 int reg)
  98 {
  99         u32 *regs = ring->status_page.page_addr;
 100         return regs[reg];
 101 }
 102
 103 int intel_init_ring_buffer(struct drm_device *dev,
 104                 struct intel_ring_buffer *ring);
 105 void intel_cleanup_ring_buffer(struct drm_device *dev,
 106                 struct intel_ring_buffer *ring);
 107 int intel_wait_ring_buffer(struct drm_device *dev,
 108                 struct intel_ring_buffer *ring, int n);
 109 int intel_wrap_ring_buffer(struct drm_device *dev,
 110                 struct intel_ring_buffer *ring);
 111 void intel_ring_begin(struct drm_device *dev,
 112                 struct intel_ring_buffer *ring, int n);
 113
 114 static inline void intel_ring_emit(struct drm_device *dev,
 115                                    struct intel_ring_buffer *ring,
 116                                    unsigned int data)
 117 {
 118         unsigned int *virt = ring->virtual_start + ring->tail;
 119         *virt = data;
 120         ring->tail += 4;
 121 }
 122
 123 void intel_fill_struct(struct drm_device *dev,
 124                 struct intel_ring_buffer *ring,
 125                 void *data,
 126                 unsigned int len);
 127 void intel_ring_advance(struct drm_device *dev,
 128                 struct intel_ring_buffer *ring);
 129
 130 u32 intel_ring_get_seqno(struct drm_device *dev,
 131                 struct intel_ring_buffer *ring);
 132
 133 extern struct intel_ring_buffer render_ring;
 134 extern struct intel_ring_buffer bsd_ring;
 135
 136 #endif /* _INTEL_RINGBUFFER_H_ */