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authorChristian Koenig <christian.koenig@amd.com>2012-05-17 21:52:00 +0400
committerChristian König <deathsimple@vodafone.de>2012-06-21 11:38:53 +0400
commit736fc37fd7c7634e939e9ec0c67765941913bb82 (patch)
treebf98094b72dc7b41ae4714a7b51f0e54d799419a /drivers/gpu/drm/radeon/radeon_irq_kms.c
parentfb98257a9d9d2089972b18079d5bdd4412e107e2 (diff)
downloadlinux-736fc37fd7c7634e939e9ec0c67765941913bb82.tar.xz
drm/radeon: replace pflip and sw_int counters with atomics
So we can skip the locking. Also renames sw_int to ring_int, cause that better matches its purpose. Signed-off-by: Christian Koenig <christian.koenig@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_irq_kms.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_irq_kms.c59
1 files changed, 28 insertions, 31 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_irq_kms.c b/drivers/gpu/drm/radeon/radeon_irq_kms.c
index c5eb7a1461cf..6664514bbdca 100644
--- a/drivers/gpu/drm/radeon/radeon_irq_kms.c
+++ b/drivers/gpu/drm/radeon/radeon_irq_kms.c
@@ -70,13 +70,13 @@ void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
spin_lock_irqsave(&rdev->irq.lock, irqflags);
/* Disable *all* interrupts */
for (i = 0; i < RADEON_NUM_RINGS; i++)
- rdev->irq.sw_int[i] = false;
+ atomic_set(&rdev->irq.ring_int[i], 0);
rdev->irq.gui_idle = false;
for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
rdev->irq.hpd[i] = false;
for (i = 0; i < RADEON_MAX_CRTCS; i++) {
rdev->irq.crtc_vblank_int[i] = false;
- rdev->irq.pflip[i] = false;
+ atomic_set(&rdev->irq.pflip[i], 0);
rdev->irq.afmt[i] = false;
}
radeon_irq_set(rdev);
@@ -87,16 +87,7 @@ void radeon_driver_irq_preinstall_kms(struct drm_device *dev)
int radeon_driver_irq_postinstall_kms(struct drm_device *dev)
{
- struct radeon_device *rdev = dev->dev_private;
- unsigned long irqflags;
- unsigned i;
-
dev->max_vblank_count = 0x001fffff;
- spin_lock_irqsave(&rdev->irq.lock, irqflags);
- for (i = 0; i < RADEON_NUM_RINGS; i++)
- rdev->irq.sw_int[i] = true;
- radeon_irq_set(rdev);
- spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
return 0;
}
@@ -112,13 +103,13 @@ void radeon_driver_irq_uninstall_kms(struct drm_device *dev)
spin_lock_irqsave(&rdev->irq.lock, irqflags);
/* Disable *all* interrupts */
for (i = 0; i < RADEON_NUM_RINGS; i++)
- rdev->irq.sw_int[i] = false;
+ atomic_set(&rdev->irq.ring_int[i], 0);
rdev->irq.gui_idle = false;
for (i = 0; i < RADEON_MAX_HPD_PINS; i++)
rdev->irq.hpd[i] = false;
for (i = 0; i < RADEON_MAX_CRTCS; i++) {
rdev->irq.crtc_vblank_int[i] = false;
- rdev->irq.pflip[i] = false;
+ atomic_set(&rdev->irq.pflip[i], 0);
rdev->irq.afmt[i] = false;
}
radeon_irq_set(rdev);
@@ -225,25 +216,28 @@ void radeon_irq_kms_sw_irq_get(struct radeon_device *rdev, int ring)
{
unsigned long irqflags;
- spin_lock_irqsave(&rdev->irq.lock, irqflags);
- if (rdev->ddev->irq_enabled && (++rdev->irq.sw_refcount[ring] == 1)) {
- rdev->irq.sw_int[ring] = true;
+ if (!rdev->ddev->irq_enabled)
+ return;
+
+ if (atomic_inc_return(&rdev->irq.ring_int[ring]) == 1) {
+ spin_lock_irqsave(&rdev->irq.lock, irqflags);
radeon_irq_set(rdev);
+ spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
- spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
void radeon_irq_kms_sw_irq_put(struct radeon_device *rdev, int ring)
{
unsigned long irqflags;
- spin_lock_irqsave(&rdev->irq.lock, irqflags);
- BUG_ON(rdev->ddev->irq_enabled && rdev->irq.sw_refcount[ring] <= 0);
- if (rdev->ddev->irq_enabled && (--rdev->irq.sw_refcount[ring] == 0)) {
- rdev->irq.sw_int[ring] = false;
+ if (!rdev->ddev->irq_enabled)
+ return;
+
+ if (atomic_dec_and_test(&rdev->irq.ring_int[ring])) {
+ spin_lock_irqsave(&rdev->irq.lock, irqflags);
radeon_irq_set(rdev);
+ spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
- spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
@@ -253,12 +247,14 @@ void radeon_irq_kms_pflip_irq_get(struct radeon_device *rdev, int crtc)
if (crtc < 0 || crtc >= rdev->num_crtc)
return;
- spin_lock_irqsave(&rdev->irq.lock, irqflags);
- if (rdev->ddev->irq_enabled && (++rdev->irq.pflip_refcount[crtc] == 1)) {
- rdev->irq.pflip[crtc] = true;
+ if (!rdev->ddev->irq_enabled)
+ return;
+
+ if (atomic_inc_return(&rdev->irq.pflip[crtc]) == 1) {
+ spin_lock_irqsave(&rdev->irq.lock, irqflags);
radeon_irq_set(rdev);
+ spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
- spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
@@ -268,13 +264,14 @@ void radeon_irq_kms_pflip_irq_put(struct radeon_device *rdev, int crtc)
if (crtc < 0 || crtc >= rdev->num_crtc)
return;
- spin_lock_irqsave(&rdev->irq.lock, irqflags);
- BUG_ON(rdev->ddev->irq_enabled && rdev->irq.pflip_refcount[crtc] <= 0);
- if (rdev->ddev->irq_enabled && (--rdev->irq.pflip_refcount[crtc] == 0)) {
- rdev->irq.pflip[crtc] = false;
+ if (!rdev->ddev->irq_enabled)
+ return;
+
+ if (atomic_dec_and_test(&rdev->irq.pflip[crtc])) {
+ spin_lock_irqsave(&rdev->irq.lock, irqflags);
radeon_irq_set(rdev);
+ spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
- spin_unlock_irqrestore(&rdev->irq.lock, irqflags);
}
void radeon_irq_kms_enable_afmt(struct radeon_device *rdev, int block)