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 #define I915_READ_TAIL(ring) I915_READ(RING_TAIL(ring->mmio_base))
  11 #define I915_WRITE_TAIL(ring, val) I915_WRITE(RING_TAIL(ring->mmio_base), val)
  12 #define I915_READ_START(ring) I915_READ(RING_START(ring->mmio_base))
  13 #define I915_WRITE_START(ring, val) I915_WRITE(RING_START(ring->mmio_base), val)
  14 #define I915_READ_HEAD(ring) I915_READ(RING_HEAD(ring->mmio_base))
  15 #define I915_WRITE_HEAD(ring, val) I915_WRITE(RING_HEAD(ring->mmio_base), val)
  16 #define I915_READ_CTL(ring) I915_READ(RING_CTL(ring->mmio_base))
  17 #define I915_WRITE_CTL(ring, val) I915_WRITE(RING_CTL(ring->mmio_base), val)
  18
  19 struct drm_i915_gem_execbuffer2;
  20 struct  intel_ring_buffer {
  21         const char      *name;
  22         enum intel_ring_id {
  23                 RING_RENDER = 0x1,
  24                 RING_BSD = 0x2,
  25         } id;
  26         u32             mmio_base;
  27         unsigned long   size;
  28         void            *virtual_start;
  29         struct          drm_device *dev;
  30         struct          drm_gem_object *gem_object;
  31
  32         unsigned int    head;
  33         unsigned int    tail;
  34         int             space;
  35         struct intel_hw_status_page status_page;
  36
  37         u32             irq_gem_seqno;          /* last seq seem at irq time */
  38         u32             waiting_gem_seqno;
  39         int             user_irq_refcount;
  40         void            (*user_irq_get)(struct drm_device *dev,
  41                         struct intel_ring_buffer *ring);
  42         void            (*user_irq_put)(struct drm_device *dev,
  43                         struct intel_ring_buffer *ring);
  44         void            (*setup_status_page)(struct drm_device *dev,
  45                         struct  intel_ring_buffer *ring);
  46
  47         int             (*init)(struct drm_device *dev,
  48                         struct intel_ring_buffer *ring);
  49
  50         void            (*set_tail)(struct drm_device *dev,
  51                                     struct intel_ring_buffer *ring,
  52                                     u32 value);
  53         unsigned int    (*get_active_head)(struct drm_device *dev,
  54                         struct intel_ring_buffer *ring);
  55         void            (*flush)(struct drm_device *dev,
  56                         struct intel_ring_buffer *ring,
  57                         u32     invalidate_domains,
  58                         u32     flush_domains);
  59         u32             (*add_request)(struct drm_device *dev,
  60                         struct intel_ring_buffer *ring,
  61                         u32 flush_domains);
  62         u32             (*get_seqno)(struct drm_device *dev,
  63                                      struct intel_ring_buffer *ring);
  64         int             (*dispatch_gem_execbuffer)(struct drm_device *dev,
  65                         struct intel_ring_buffer *ring,
  66                         struct drm_i915_gem_execbuffer2 *exec,
  67                         struct drm_clip_rect *cliprects,
  68                         uint64_t exec_offset);
  69
  70         /**
  71          * List of objects currently involved in rendering from the
  72          * ringbuffer.
  73          *
  74          * Includes buffers having the contents of their GPU caches
  75          * flushed, not necessarily primitives.  last_rendering_seqno
  76          * represents when the rendering involved will be completed.
  77          *
  78          * A reference is held on the buffer while on this list.
  79          */
  80         struct list_head active_list;
  81
  82         /**
  83          * List of breadcrumbs associated with GPU requests currently
  84          * outstanding.
  85          */
  86         struct list_head request_list;
  87
  88         wait_queue_head_t irq_queue;
  89         drm_local_map_t map;
  90 };
  91
  92 static inline u32
  93 intel_read_status_page(struct intel_ring_buffer *ring,
  94                 int reg)
  95 {
  96         u32 *regs = ring->status_page.page_addr;
  97         return regs[reg];
  98 }
  99
 100 int intel_init_ring_buffer(struct drm_device *dev,
 101                            struct intel_ring_buffer *ring);
 102 void intel_cleanup_ring_buffer(struct drm_device *dev,
 103                                struct intel_ring_buffer *ring);
 104 int intel_wait_ring_buffer(struct drm_device *dev,
 105                            struct intel_ring_buffer *ring, int n);
 106 void intel_ring_begin(struct drm_device *dev,
 107                       struct intel_ring_buffer *ring, int n);
 108
 109 static inline void intel_ring_emit(struct drm_device *dev,
 110                                    struct intel_ring_buffer *ring,
 111                                    unsigned int data)
 112 {
 113         unsigned int *virt = ring->virtual_start + ring->tail;
 114         *virt = data;
 115         ring->tail += 4;
 116 }
 117
 118 void intel_fill_struct(struct drm_device *dev,
 119                 struct intel_ring_buffer *ring,
 120                 void *data,
 121                 unsigned int len);
 122 void intel_ring_advance(struct drm_device *dev,
 123                 struct intel_ring_buffer *ring);
 124
 125 u32 intel_ring_get_seqno(struct drm_device *dev,
 126                 struct intel_ring_buffer *ring);
 127
 128 int intel_init_render_ring_buffer(struct drm_device *dev);
 129 int intel_init_bsd_ring_buffer(struct drm_device *dev);
 130
 131 #endif /* _INTEL_RINGBUFFER_H_ */