drivers/gpu/drm/i915/display/intel_global_state.h

   1 /* SPDX-License-Identifier: MIT */
   2 /*
   3  * Copyright © 2020 Intel Corporation
   4  */
   5
   6 #ifndef __INTEL_GLOBAL_STATE_H__
   7 #define __INTEL_GLOBAL_STATE_H__
   8
   9 #include <linux/kref.h>
  10 #include <linux/list.h>
  11
  12 struct drm_i915_private;
  13 struct intel_atomic_state;
  14 struct intel_global_obj;
  15 struct intel_global_state;
  16
  17 struct intel_global_state_funcs {
  18         struct intel_global_state *(*atomic_duplicate_state)(struct intel_global_obj *obj);
  19         void (*atomic_destroy_state)(struct intel_global_obj *obj,
  20                                      struct intel_global_state *state);
  21 };
  22
  23 struct intel_global_obj {
  24         struct list_head head;
  25         struct intel_global_state *state;
  26         const struct intel_global_state_funcs *funcs;
  27 };
  28
  29 #define intel_for_each_global_obj(obj, dev_priv) \
  30         list_for_each_entry(obj, &(dev_priv)->global_obj_list, head)
  31
  32 #define for_each_new_global_obj_in_state(__state, obj, new_obj_state, __i) \
  33         for ((__i) = 0; \
  34              (__i) < (__state)->num_global_objs && \
  35                      ((obj) = (__state)->global_objs[__i].ptr, \
  36                       (new_obj_state) = (__state)->global_objs[__i].new_state, 1); \
  37              (__i)++) \
  38                 for_each_if(obj)
  39
  40 #define for_each_old_global_obj_in_state(__state, obj, new_obj_state, __i) \
  41         for ((__i) = 0; \
  42              (__i) < (__state)->num_global_objs && \
  43                      ((obj) = (__state)->global_objs[__i].ptr, \
  44                       (new_obj_state) = (__state)->global_objs[__i].old_state, 1); \
  45              (__i)++) \
  46                 for_each_if(obj)
  47
  48 #define for_each_oldnew_global_obj_in_state(__state, obj, old_obj_state, new_obj_state, __i) \
  49         for ((__i) = 0; \
  50              (__i) < (__state)->num_global_objs && \
  51                      ((obj) = (__state)->global_objs[__i].ptr, \
  52                       (old_obj_state) = (__state)->global_objs[__i].old_state, \
  53                       (new_obj_state) = (__state)->global_objs[__i].new_state, 1); \
  54              (__i)++) \
  55                 for_each_if(obj)
  56
  57 struct intel_global_state {
  58         struct intel_global_obj *obj;
  59         struct intel_atomic_state *state;
  60         struct kref ref;
  61         bool changed;
  62 };
  63
  64 struct __intel_global_objs_state {
  65         struct intel_global_obj *ptr;
  66         struct intel_global_state *state, *old_state, *new_state;
  67 };
  68
  69 void intel_atomic_global_obj_init(struct drm_i915_private *dev_priv,
  70                                   struct intel_global_obj *obj,
  71                                   struct intel_global_state *state,
  72                                   const struct intel_global_state_funcs *funcs);
  73 void intel_atomic_global_obj_cleanup(struct drm_i915_private *dev_priv);
  74
  75 struct intel_global_state *
  76 intel_atomic_get_global_obj_state(struct intel_atomic_state *state,
  77                                   struct intel_global_obj *obj);
  78 struct intel_global_state *
  79 intel_atomic_get_old_global_obj_state(struct intel_atomic_state *state,
  80                                       struct intel_global_obj *obj);
  81 struct intel_global_state *
  82 intel_atomic_get_new_global_obj_state(struct intel_atomic_state *state,
  83                                       struct intel_global_obj *obj);
  84
  85 void intel_atomic_swap_global_state(struct intel_atomic_state *state);
  86 void intel_atomic_clear_global_state(struct intel_atomic_state *state);
  87 int intel_atomic_lock_global_state(struct intel_global_state *obj_state);
  88 int intel_atomic_serialize_global_state(struct intel_global_state *obj_state);
  89
  90 #endif