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96b451d53a
As the first step towards making struct intel_display an opaque pointer
in i915 and xe drivers, convert the struct drm_i915_private and struct
xe_device display members into pointers.
Initially, add temporary struct intel_display __display members, and
point display at it to avoid dynamic allocation. In the future, we can
drop this, and switch to dynamic allocation.
The conversion is done simply with sed:
sed -i 's/&\([a-zA-Z0-9_>.-]*\)\(dev_priv\|i915\|xe\)->display\([^.]\)/\1\2->display\3/g' \
$(git ls-files -- drivers/gpu/drm/i915 drivers/gpu/drm/xe)
sed -i 's/\(dev_priv\|i915\|xe\)->display\./\1->display->/g' \
$(git ls-files -- drivers/gpu/drm/i915 drivers/gpu/drm/xe)
With a couple of manual tweaks on top.
v2: Initialize i915->display also in selftest mock_gem_device()
Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://lore.kernel.org/r/20250507152254.2398934-1-jani.nikula@intel.com
105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Copyright © 2023 Intel Corporation
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*/
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#ifndef __I915_GEM_OBJECT_FRONTBUFFER_H__
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#define __I915_GEM_OBJECT_FRONTBUFFER_H__
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#include <linux/kref.h>
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#include <linux/rcupdate.h>
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#include "display/intel_frontbuffer.h"
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#include "i915_gem_object_types.h"
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void __i915_gem_object_flush_frontbuffer(struct drm_i915_gem_object *obj,
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enum fb_op_origin origin);
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void __i915_gem_object_invalidate_frontbuffer(struct drm_i915_gem_object *obj,
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enum fb_op_origin origin);
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static inline void
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i915_gem_object_flush_frontbuffer(struct drm_i915_gem_object *obj,
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enum fb_op_origin origin)
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{
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if (unlikely(rcu_access_pointer(obj->frontbuffer)))
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__i915_gem_object_flush_frontbuffer(obj, origin);
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}
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static inline void
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i915_gem_object_invalidate_frontbuffer(struct drm_i915_gem_object *obj,
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enum fb_op_origin origin)
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{
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if (unlikely(rcu_access_pointer(obj->frontbuffer)))
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__i915_gem_object_invalidate_frontbuffer(obj, origin);
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}
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/**
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* i915_gem_object_get_frontbuffer - Get the object's frontbuffer
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* @obj: The object whose frontbuffer to get.
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*
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* Get pointer to object's frontbuffer if such exists. Please note that RCU
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* mechanism is used to handle e.g. ongoing removal of frontbuffer pointer.
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*
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* Return: pointer to object's frontbuffer is such exists or NULL
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*/
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static inline struct intel_frontbuffer *
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i915_gem_object_get_frontbuffer(const struct drm_i915_gem_object *obj)
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{
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struct intel_frontbuffer *front;
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if (likely(!rcu_access_pointer(obj->frontbuffer)))
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return NULL;
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rcu_read_lock();
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do {
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front = rcu_dereference(obj->frontbuffer);
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if (!front)
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break;
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if (unlikely(!kref_get_unless_zero(&front->ref)))
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continue;
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if (likely(front == rcu_access_pointer(obj->frontbuffer)))
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break;
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intel_frontbuffer_put(front);
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} while (1);
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rcu_read_unlock();
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return front;
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}
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/**
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* i915_gem_object_set_frontbuffer - Set the object's frontbuffer
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* @obj: The object whose frontbuffer to set.
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* @front: The frontbuffer to set
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*
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* Set object's frontbuffer pointer. If frontbuffer is already set for the
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* object keep it and return it's pointer to the caller. Please note that RCU
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* mechanism is used to handle e.g. ongoing removal of frontbuffer pointer. This
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* function is protected by i915->display->fb_tracking.lock
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*
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* Return: pointer to frontbuffer which was set.
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*/
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static inline struct intel_frontbuffer *
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i915_gem_object_set_frontbuffer(struct drm_i915_gem_object *obj,
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struct intel_frontbuffer *front)
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{
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struct intel_frontbuffer *cur = front;
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if (!front) {
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RCU_INIT_POINTER(obj->frontbuffer, NULL);
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drm_gem_object_put(intel_bo_to_drm_bo(obj));
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} else if (rcu_access_pointer(obj->frontbuffer)) {
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cur = rcu_dereference_protected(obj->frontbuffer, true);
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kref_get(&cur->ref);
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} else {
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drm_gem_object_get(intel_bo_to_drm_bo(obj));
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rcu_assign_pointer(obj->frontbuffer, front);
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}
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return cur;
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}
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#endif
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