0ef1905ecf
Our current global state handling is pretty ad-hoc. Let's try to make it better by imitating the standard drm core private object approach. The reason why we don't want to directly use the private objects is locking; Each private object has its own lock so if we introduce any global private objects we get serialized by that single lock across all pipes. The global state apporoach instead uses a read/write lock type of approach where each individual crtc lock counts as a read lock, and grabbing all the crtc locks allows one write access. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200120174728.21095-15-ville.syrjala@linux.intel.com Reviewed-by: Imre Deak <imre.deak@intel.com>
88 lines
2.9 KiB
C
88 lines
2.9 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2020 Intel Corporation
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*/
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#ifndef __INTEL_GLOBAL_STATE_H__
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#define __INTEL_GLOBAL_STATE_H__
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#include <linux/list.h>
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struct drm_i915_private;
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struct intel_atomic_state;
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struct intel_global_obj;
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struct intel_global_state;
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struct intel_global_state_funcs {
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struct intel_global_state *(*atomic_duplicate_state)(struct intel_global_obj *obj);
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void (*atomic_destroy_state)(struct intel_global_obj *obj,
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struct intel_global_state *state);
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};
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struct intel_global_obj {
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struct list_head head;
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struct intel_global_state *state;
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const struct intel_global_state_funcs *funcs;
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};
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#define intel_for_each_global_obj(obj, dev_priv) \
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list_for_each_entry(obj, &(dev_priv)->global_obj_list, head)
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#define for_each_new_global_obj_in_state(__state, obj, new_obj_state, __i) \
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for ((__i) = 0; \
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(__i) < (__state)->num_global_objs && \
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((obj) = (__state)->global_objs[__i].ptr, \
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(new_obj_state) = (__state)->global_objs[__i].new_state, 1); \
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(__i)++) \
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for_each_if(obj)
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#define for_each_old_global_obj_in_state(__state, obj, new_obj_state, __i) \
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for ((__i) = 0; \
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(__i) < (__state)->num_global_objs && \
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((obj) = (__state)->global_objs[__i].ptr, \
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(new_obj_state) = (__state)->global_objs[__i].old_state, 1); \
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(__i)++) \
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for_each_if(obj)
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#define for_each_oldnew_global_obj_in_state(__state, obj, old_obj_state, new_obj_state, __i) \
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for ((__i) = 0; \
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(__i) < (__state)->num_global_objs && \
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((obj) = (__state)->global_objs[__i].ptr, \
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(old_obj_state) = (__state)->global_objs[__i].old_state, \
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(new_obj_state) = (__state)->global_objs[__i].new_state, 1); \
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(__i)++) \
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for_each_if(obj)
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struct intel_global_state {
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struct intel_atomic_state *state;
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bool changed;
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};
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struct __intel_global_objs_state {
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struct intel_global_obj *ptr;
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struct intel_global_state *state, *old_state, *new_state;
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};
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void intel_atomic_global_obj_init(struct drm_i915_private *dev_priv,
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struct intel_global_obj *obj,
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struct intel_global_state *state,
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const struct intel_global_state_funcs *funcs);
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void intel_atomic_global_obj_cleanup(struct drm_i915_private *dev_priv);
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struct intel_global_state *
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intel_atomic_get_global_obj_state(struct intel_atomic_state *state,
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struct intel_global_obj *obj);
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struct intel_global_state *
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intel_atomic_get_old_global_obj_state(struct intel_atomic_state *state,
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struct intel_global_obj *obj);
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struct intel_global_state *
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intel_atomic_get_new_global_obj_state(struct intel_atomic_state *state,
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struct intel_global_obj *obj);
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void intel_atomic_swap_global_state(struct intel_atomic_state *state);
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void intel_atomic_clear_global_state(struct intel_atomic_state *state);
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int intel_atomic_lock_global_state(struct intel_global_state *obj_state);
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int intel_atomic_serialize_global_state(struct intel_global_state *obj_state);
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#endif
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