[PATCH 2/2] drm/i915/display: Neuter frontbuffer tracking harder
Maarten Lankhorst
maarten.lankhorst at linux.intel.com
Wed Nov 30 17:43:09 UTC 2022
Remove intel_frontbuffer type, and use fb->bits.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
drivers/gpu/drm/i915/display/intel_cursor.c | 6 +-
drivers/gpu/drm/i915/display/intel_display.c | 4 +-
.../drm/i915/display/intel_display_types.h | 8 +-
drivers/gpu/drm/i915/display/intel_fb.c | 11 +-
drivers/gpu/drm/i915/display/intel_fb_pin.c | 6 -
drivers/gpu/drm/i915/display/intel_fbdev.c | 7 +-
.../gpu/drm/i915/display/intel_frontbuffer.c | 103 ++----------------
.../gpu/drm/i915/display/intel_frontbuffer.h | 67 +++---------
.../drm/i915/display/intel_plane_initial.c | 2 +-
9 files changed, 32 insertions(+), 182 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_cursor.c b/drivers/gpu/drm/i915/display/intel_cursor.c
index d190fa0d393b..371009f8e194 100644
--- a/drivers/gpu/drm/i915/display/intel_cursor.c
+++ b/drivers/gpu/drm/i915/display/intel_cursor.c
@@ -692,10 +692,10 @@ intel_legacy_cursor_update(struct drm_plane *_plane,
if (ret)
goto out_free;
- intel_frontbuffer_flush(to_intel_frontbuffer(new_plane_state->hw.fb),
+ intel_frontbuffer_flush(to_intel_framebuffer(new_plane_state->hw.fb),
ORIGIN_CURSOR_UPDATE);
- intel_frontbuffer_track(to_intel_frontbuffer(old_plane_state->hw.fb),
- to_intel_frontbuffer(new_plane_state->hw.fb),
+ intel_frontbuffer_track(to_intel_framebuffer(old_plane_state->hw.fb),
+ to_intel_framebuffer(new_plane_state->hw.fb),
plane->frontbuffer_bit);
/* Swap plane state */
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 32b257157186..5bb42b9881be 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -7670,8 +7670,8 @@ static void intel_atomic_track_fbs(struct intel_atomic_state *state)
for_each_oldnew_intel_plane_in_state(state, plane, old_plane_state,
new_plane_state, i)
- intel_frontbuffer_track(to_intel_frontbuffer(old_plane_state->hw.fb),
- to_intel_frontbuffer(new_plane_state->hw.fb),
+ intel_frontbuffer_track(to_intel_framebuffer(old_plane_state->hw.fb),
+ to_intel_framebuffer(new_plane_state->hw.fb),
plane->frontbuffer_bit);
}
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index ff3ef37d099e..2793acbe1b1e 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -132,7 +132,7 @@ struct intel_fb_view {
struct intel_framebuffer {
struct drm_framebuffer base;
- struct intel_frontbuffer *frontbuffer;
+ atomic_t bits;
/* Params to remap the FB pages and program the plane registers in each view. */
struct intel_fb_view normal_view;
@@ -2048,10 +2048,4 @@ static inline u32 intel_plane_ggtt_offset(const struct intel_plane_state *plane_
return i915_ggtt_offset(plane_state->ggtt_vma);
}
-static inline struct intel_frontbuffer *
-to_intel_frontbuffer(struct drm_framebuffer *fb)
-{
- return fb ? to_intel_framebuffer(fb)->frontbuffer : NULL;
-}
-
#endif /* __INTEL_DISPLAY_TYPES_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_fb.c b/drivers/gpu/drm/i915/display/intel_fb.c
index 7cf31c87884c..56cdacf33db2 100644
--- a/drivers/gpu/drm/i915/display/intel_fb.c
+++ b/drivers/gpu/drm/i915/display/intel_fb.c
@@ -1833,8 +1833,7 @@ static void intel_user_framebuffer_destroy(struct drm_framebuffer *fb)
if (intel_fb_uses_dpt(fb))
intel_dpt_destroy(intel_fb->dpt_vm);
- intel_frontbuffer_put(intel_fb->frontbuffer);
-
+ drm_gem_object_put(fb->obj[0]);
kfree(intel_fb);
}
@@ -1863,7 +1862,7 @@ static int intel_user_framebuffer_dirty(struct drm_framebuffer *fb,
struct drm_i915_gem_object *obj = intel_fb_obj(fb);
i915_gem_object_flush_if_display(obj);
- intel_frontbuffer_flush(to_intel_frontbuffer(fb), ORIGIN_DIRTYFB);
+ intel_frontbuffer_flush(to_intel_framebuffer(fb), ORIGIN_DIRTYFB);
return 0;
}
@@ -1885,10 +1884,6 @@ int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
int ret = -EINVAL;
int i;
- intel_fb->frontbuffer = intel_frontbuffer_get(obj);
- if (!intel_fb->frontbuffer)
- return -ENOMEM;
-
i915_gem_object_lock(obj, NULL);
tiling = i915_gem_object_get_tiling(obj);
stride = i915_gem_object_get_stride(obj);
@@ -2021,10 +2016,10 @@ int intel_framebuffer_init(struct intel_framebuffer *intel_fb,
goto err;
}
+ drm_gem_object_get(fb->obj[0]);
return 0;
err:
- intel_frontbuffer_put(intel_fb->frontbuffer);
return ret;
}
diff --git a/drivers/gpu/drm/i915/display/intel_fb_pin.c b/drivers/gpu/drm/i915/display/intel_fb_pin.c
index 6900acbb1381..904fcb5f0883 100644
--- a/drivers/gpu/drm/i915/display/intel_fb_pin.c
+++ b/drivers/gpu/drm/i915/display/intel_fb_pin.c
@@ -37,9 +37,6 @@ intel_pin_fb_obj_dpt(struct drm_framebuffer *fb,
*/
GEM_WARN_ON(vm->bind_async_flags);
- if (WARN_ON(!i915_gem_object_is_framebuffer(obj)))
- return ERR_PTR(-EINVAL);
-
alignment = 4096 * 512;
atomic_inc(&dev_priv->gpu_error.pending_fb_pin);
@@ -119,9 +116,6 @@ intel_pin_and_fence_fb_obj(struct drm_framebuffer *fb,
u32 alignment;
int ret;
- if (drm_WARN_ON(dev, !i915_gem_object_is_framebuffer(obj)))
- return ERR_PTR(-EINVAL);
-
if (phys_cursor)
alignment = intel_cursor_alignment(dev_priv);
else
diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c
index 5575d7abdc09..4c367d045aea 100644
--- a/drivers/gpu/drm/i915/display/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/display/intel_fbdev.c
@@ -67,14 +67,9 @@ struct intel_fbdev {
struct mutex hpd_lock;
};
-static struct intel_frontbuffer *to_frontbuffer(struct intel_fbdev *ifbdev)
-{
- return ifbdev->fb->frontbuffer;
-}
-
static void intel_fbdev_invalidate(struct intel_fbdev *ifbdev)
{
- intel_frontbuffer_invalidate(to_frontbuffer(ifbdev), ORIGIN_CPU);
+ intel_frontbuffer_invalidate(ifbdev->fb, ORIGIN_CPU);
}
static int intel_fbdev_set_par(struct fb_info *info)
diff --git a/drivers/gpu/drm/i915/display/intel_frontbuffer.c b/drivers/gpu/drm/i915/display/intel_frontbuffer.c
index 17a7aa8b28c2..99d194803520 100644
--- a/drivers/gpu/drm/i915/display/intel_frontbuffer.c
+++ b/drivers/gpu/drm/i915/display/intel_frontbuffer.c
@@ -163,11 +163,11 @@ void intel_frontbuffer_flip(struct drm_i915_private *i915,
frontbuffer_flush(i915, frontbuffer_bits, ORIGIN_FLIP);
}
-void __intel_fb_invalidate(struct intel_frontbuffer *front,
+void __intel_fb_invalidate(struct intel_framebuffer *fb,
enum fb_op_origin origin,
unsigned int frontbuffer_bits)
{
- struct drm_i915_private *i915 = to_i915(front->obj->base.dev);
+ struct drm_i915_private *i915 = to_i915(fb->base.dev);
if (origin == ORIGIN_CS) {
spin_lock(&i915->display.fb_tracking.lock);
@@ -184,11 +184,11 @@ void __intel_fb_invalidate(struct intel_frontbuffer *front,
intel_fbc_invalidate(i915, frontbuffer_bits, origin);
}
-void __intel_fb_flush(struct intel_frontbuffer *front,
+void __intel_fb_flush(struct intel_framebuffer *fb,
enum fb_op_origin origin,
unsigned int frontbuffer_bits)
{
- struct drm_i915_private *i915 = to_i915(front->obj->base.dev);
+ struct drm_i915_private *i915 = to_i915(fb->base.dev);
if (origin == ORIGIN_CS) {
spin_lock(&i915->display.fb_tracking.lock);
@@ -202,93 +202,6 @@ void __intel_fb_flush(struct intel_frontbuffer *front,
frontbuffer_flush(i915, frontbuffer_bits, origin);
}
-static int frontbuffer_active(struct i915_active *ref)
-{
- struct intel_frontbuffer *front =
- container_of(ref, typeof(*front), write);
-
- kref_get(&front->ref);
- return 0;
-}
-
-static void frontbuffer_retire(struct i915_active *ref)
-{
- struct intel_frontbuffer *front =
- container_of(ref, typeof(*front), write);
-
- intel_frontbuffer_flush(front, ORIGIN_CS);
- intel_frontbuffer_put(front);
-}
-
-static void frontbuffer_release(struct kref *ref)
- __releases(&to_i915(front->obj->base.dev)->display.fb_tracking.lock)
-{
- struct intel_frontbuffer *front =
- container_of(ref, typeof(*front), ref);
- struct drm_i915_gem_object *obj = front->obj;
- struct i915_vma *vma;
-
- drm_WARN_ON(obj->base.dev, atomic_read(&front->bits));
-
- spin_lock(&obj->vma.lock);
- for_each_ggtt_vma(vma, obj) {
- i915_vma_clear_scanout(vma);
- vma->display_alignment = I915_GTT_MIN_ALIGNMENT;
- }
- spin_unlock(&obj->vma.lock);
-
- RCU_INIT_POINTER(obj->frontbuffer, NULL);
- spin_unlock(&to_i915(obj->base.dev)->display.fb_tracking.lock);
-
- i915_active_fini(&front->write);
-
- i915_gem_object_put(obj);
- kfree_rcu(front, rcu);
-}
-
-struct intel_frontbuffer *
-intel_frontbuffer_get(struct drm_i915_gem_object *obj)
-{
- struct drm_i915_private *i915 = to_i915(obj->base.dev);
- struct intel_frontbuffer *front;
-
- front = __intel_frontbuffer_get(obj);
- if (front)
- return front;
-
- front = kmalloc(sizeof(*front), GFP_KERNEL);
- if (!front)
- return NULL;
-
- front->obj = obj;
- kref_init(&front->ref);
- atomic_set(&front->bits, 0);
- i915_active_init(&front->write,
- frontbuffer_active,
- frontbuffer_retire,
- I915_ACTIVE_RETIRE_SLEEPS);
-
- spin_lock(&i915->display.fb_tracking.lock);
- if (rcu_access_pointer(obj->frontbuffer)) {
- kfree(front);
- front = rcu_dereference_protected(obj->frontbuffer, true);
- kref_get(&front->ref);
- } else {
- i915_gem_object_get(obj);
- rcu_assign_pointer(obj->frontbuffer, front);
- }
- spin_unlock(&i915->display.fb_tracking.lock);
-
- return front;
-}
-
-void intel_frontbuffer_put(struct intel_frontbuffer *front)
-{
- kref_put_lock(&front->ref,
- frontbuffer_release,
- &to_i915(front->obj->base.dev)->display.fb_tracking.lock);
-}
-
/**
* intel_frontbuffer_track - update frontbuffer tracking
* @old: current buffer for the frontbuffer slots
@@ -298,8 +211,8 @@ void intel_frontbuffer_put(struct intel_frontbuffer *front)
* This updates the frontbuffer tracking bits @frontbuffer_bits by clearing them
* from @old and setting them in @new. Both @old and @new can be NULL.
*/
-void intel_frontbuffer_track(struct intel_frontbuffer *old,
- struct intel_frontbuffer *new,
+void intel_frontbuffer_track(struct intel_framebuffer *old,
+ struct intel_framebuffer *new,
unsigned int frontbuffer_bits)
{
/*
@@ -315,13 +228,13 @@ void intel_frontbuffer_track(struct intel_frontbuffer *old,
BUILD_BUG_ON(I915_MAX_PLANES > INTEL_FRONTBUFFER_BITS_PER_PIPE);
if (old) {
- drm_WARN_ON(old->obj->base.dev,
+ drm_WARN_ON(old->base.dev,
!(atomic_read(&old->bits) & frontbuffer_bits));
atomic_andnot(frontbuffer_bits, &old->bits);
}
if (new) {
- drm_WARN_ON(new->obj->base.dev,
+ drm_WARN_ON(new->base.dev,
atomic_read(&new->bits) & frontbuffer_bits);
atomic_or(frontbuffer_bits, &new->bits);
}
diff --git a/drivers/gpu/drm/i915/display/intel_frontbuffer.h b/drivers/gpu/drm/i915/display/intel_frontbuffer.h
index 3c474ed937fb..b91338651139 100644
--- a/drivers/gpu/drm/i915/display/intel_frontbuffer.h
+++ b/drivers/gpu/drm/i915/display/intel_frontbuffer.h
@@ -28,8 +28,7 @@
#include <linux/bits.h>
#include <linux/kref.h>
-#include "gem/i915_gem_object_types.h"
-#include "i915_active_types.h"
+#include "intel_display_types.h"
struct drm_i915_private;
@@ -41,14 +40,6 @@ enum fb_op_origin {
ORIGIN_CURSOR_UPDATE,
};
-struct intel_frontbuffer {
- struct kref ref;
- atomic_t bits;
- struct i915_active write;
- struct drm_i915_gem_object *obj;
- struct rcu_head rcu;
-};
-
/*
* Frontbuffer tracking bits. Set in obj->frontbuffer_bits while a gem bo is
* considered to be the frontbuffer for the given plane interface-wise. This
@@ -73,39 +64,7 @@ void intel_frontbuffer_flip_complete(struct drm_i915_private *i915,
void intel_frontbuffer_flip(struct drm_i915_private *i915,
unsigned frontbuffer_bits);
-void intel_frontbuffer_put(struct intel_frontbuffer *front);
-
-static inline struct intel_frontbuffer *
-__intel_frontbuffer_get(const struct drm_i915_gem_object *obj)
-{
- struct intel_frontbuffer *front;
-
- if (likely(!rcu_access_pointer(obj->frontbuffer)))
- return NULL;
-
- rcu_read_lock();
- do {
- front = rcu_dereference(obj->frontbuffer);
- if (!front)
- break;
-
- if (unlikely(!kref_get_unless_zero(&front->ref)))
- continue;
-
- if (likely(front == rcu_access_pointer(obj->frontbuffer)))
- break;
-
- intel_frontbuffer_put(front);
- } while (1);
- rcu_read_unlock();
-
- return front;
-}
-
-struct intel_frontbuffer *
-intel_frontbuffer_get(struct drm_i915_gem_object *obj);
-
-void __intel_fb_invalidate(struct intel_frontbuffer *front,
+void __intel_fb_invalidate(struct intel_framebuffer *front,
enum fb_op_origin origin,
unsigned int frontbuffer_bits);
@@ -120,23 +79,23 @@ void __intel_fb_invalidate(struct intel_frontbuffer *front,
* until the rendering completes or a flip on this frontbuffer plane is
* scheduled.
*/
-static inline bool intel_frontbuffer_invalidate(struct intel_frontbuffer *front,
+static inline bool intel_frontbuffer_invalidate(struct intel_framebuffer *fb,
enum fb_op_origin origin)
{
unsigned int frontbuffer_bits;
- if (!front)
+ if (!fb)
return false;
- frontbuffer_bits = atomic_read(&front->bits);
+ frontbuffer_bits = atomic_read(&fb->bits);
if (!frontbuffer_bits)
return false;
- __intel_fb_invalidate(front, origin, frontbuffer_bits);
+ __intel_fb_invalidate(fb, origin, frontbuffer_bits);
return true;
}
-void __intel_fb_flush(struct intel_frontbuffer *front,
+void __intel_fb_flush(struct intel_framebuffer *fb,
enum fb_op_origin origin,
unsigned int frontbuffer_bits);
@@ -148,23 +107,23 @@ void __intel_fb_flush(struct intel_frontbuffer *front,
* This function gets called every time rendering on the given object has
* completed and frontbuffer caching can be started again.
*/
-static inline void intel_frontbuffer_flush(struct intel_frontbuffer *front,
+static inline void intel_frontbuffer_flush(struct intel_framebuffer *fb,
enum fb_op_origin origin)
{
unsigned int frontbuffer_bits;
- if (!front)
+ if (!fb)
return;
- frontbuffer_bits = atomic_read(&front->bits);
+ frontbuffer_bits = atomic_read(&fb->bits);
if (!frontbuffer_bits)
return;
- __intel_fb_flush(front, origin, frontbuffer_bits);
+ __intel_fb_flush(fb, origin, frontbuffer_bits);
}
-void intel_frontbuffer_track(struct intel_frontbuffer *old,
- struct intel_frontbuffer *new,
+void intel_frontbuffer_track(struct intel_framebuffer *old,
+ struct intel_framebuffer *new,
unsigned int frontbuffer_bits);
#endif /* __INTEL_FRONTBUFFER_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_plane_initial.c b/drivers/gpu/drm/i915/display/intel_plane_initial.c
index cad9c8884af3..82a54152d731 100644
--- a/drivers/gpu/drm/i915/display/intel_plane_initial.c
+++ b/drivers/gpu/drm/i915/display/intel_plane_initial.c
@@ -281,7 +281,7 @@ intel_find_initial_plane_obj(struct intel_crtc *crtc,
plane_state->uapi.crtc = &crtc->base;
intel_plane_copy_uapi_to_hw_state(plane_state, plane_state, crtc);
- atomic_or(plane->frontbuffer_bit, &to_intel_frontbuffer(fb)->bits);
+ atomic_or(plane->frontbuffer_bit, &to_intel_framebuffer(fb)->bits);
}
static void plane_config_fini(struct intel_initial_plane_config *plane_config)
--
2.34.1
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