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 91