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Diffstat (limited to 'bsd-core/drm_lock.c')
-rw-r--r--bsd-core/drm_lock.c163
1 files changed, 81 insertions, 82 deletions
diff --git a/bsd-core/drm_lock.c b/bsd-core/drm_lock.c
index 80ebb71d..685b0ea3 100644
--- a/bsd-core/drm_lock.c
+++ b/bsd-core/drm_lock.c
@@ -49,89 +49,28 @@
#include "drmP.h"
-int drm_lock_take(__volatile__ unsigned int *lock, unsigned int context)
-{
- unsigned int old, new;
-
- do {
- old = *lock;
- if (old & _DRM_LOCK_HELD) new = old | _DRM_LOCK_CONT;
- else new = context | _DRM_LOCK_HELD;
- } while (!atomic_cmpset_int(lock, old, new));
-
- if (_DRM_LOCKING_CONTEXT(old) == context) {
- if (old & _DRM_LOCK_HELD) {
- if (context != DRM_KERNEL_CONTEXT) {
- DRM_ERROR("%d holds heavyweight lock\n",
- context);
- }
- return 0;
- }
- }
- if (new == (context | _DRM_LOCK_HELD)) {
- /* Have lock */
- return 1;
- }
- return 0;
-}
-
-/* This takes a lock forcibly and hands it to context. Should ONLY be used
- inside *_unlock to give lock to kernel before calling *_dma_schedule. */
-int drm_lock_transfer(struct drm_device *dev,
- __volatile__ unsigned int *lock, unsigned int context)
-{
- unsigned int old, new;
-
- dev->lock.file_priv = NULL;
- do {
- old = *lock;
- new = context | _DRM_LOCK_HELD;
- } while (!atomic_cmpset_int(lock, old, new));
-
- return 1;
-}
-
-int drm_lock_free(struct drm_device *dev,
- __volatile__ unsigned int *lock, unsigned int context)
-{
- unsigned int old, new;
-
- dev->lock.file_priv = NULL;
- do {
- old = *lock;
- new = 0;
- } while (!atomic_cmpset_int(lock, old, new));
-
- if (_DRM_LOCK_IS_HELD(old) && _DRM_LOCKING_CONTEXT(old) != context) {
- DRM_ERROR("%d freed heavyweight lock held by %d\n",
- context, _DRM_LOCKING_CONTEXT(old));
- return 1;
- }
- DRM_WAKEUP_INT((void *)&dev->lock.lock_queue);
- return 0;
-}
-
int drm_lock(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
- drm_lock_t *lock = data;
- int ret = 0;
+ struct drm_lock *lock = data;
+ int ret = 0;
- if (lock->context == DRM_KERNEL_CONTEXT) {
- DRM_ERROR("Process %d using kernel context %d\n",
+ if (lock->context == DRM_KERNEL_CONTEXT) {
+ DRM_ERROR("Process %d using kernel context %d\n",
DRM_CURRENTPID, lock->context);
- return EINVAL;
- }
+ return EINVAL;
+ }
- DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
+ DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
lock->context, DRM_CURRENTPID, dev->lock.hw_lock->lock,
lock->flags);
- if (dev->driver.use_dma_queue && lock->context < 0)
- return EINVAL;
+ if (drm_core_check_feature(dev, DRIVER_DMA_QUEUE) &&
+ lock->context < 0)
+ return EINVAL;
DRM_LOCK();
for (;;) {
- if (drm_lock_take(&dev->lock.hw_lock->lock, lock->context)) {
+ if (drm_lock_take(&dev->lock, lock->context)) {
dev->lock.file_priv = file_priv;
dev->lock.lock_time = jiffies;
atomic_inc(&dev->counts[_DRM_STAT_LOCKS]);
@@ -139,13 +78,8 @@ int drm_lock(struct drm_device *dev, void *data, struct drm_file *file_priv)
}
/* Contention */
-#if defined(__FreeBSD__) && __FreeBSD_version > 500000
ret = mtx_sleep((void *)&dev->lock.lock_queue, &dev->dev_lock,
PZERO | PCATCH, "drmlk2", 0);
-#else
- ret = tsleep((void *)&dev->lock.lock_queue, PZERO | PCATCH,
- "drmlk2", 0);
-#endif
if (ret != 0)
break;
}
@@ -157,16 +91,16 @@ int drm_lock(struct drm_device *dev, void *data, struct drm_file *file_priv)
/* XXX: Add signal blocking here */
- if (dev->driver.dma_quiescent != NULL &&
+ if (dev->driver->dma_quiescent != NULL &&
(lock->flags & _DRM_LOCK_QUIESCENT))
- dev->driver.dma_quiescent(dev);
+ dev->driver->dma_quiescent(dev);
return 0;
}
int drm_unlock(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
- drm_lock_t *lock = data;
+ struct drm_lock *lock = data;
if (lock->context == DRM_KERNEL_CONTEXT) {
DRM_ERROR("Process %d using kernel context %d\n",
@@ -190,12 +124,77 @@ int drm_unlock(struct drm_device *dev, void *data, struct drm_file *file_priv)
atomic_inc(&dev->counts[_DRM_STAT_UNLOCKS]);
DRM_LOCK();
- drm_lock_transfer(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT);
+ drm_lock_transfer(&dev->lock, DRM_KERNEL_CONTEXT);
- if (drm_lock_free(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT)) {
+ if (drm_lock_free(&dev->lock, DRM_KERNEL_CONTEXT)) {
DRM_ERROR("\n");
}
DRM_UNLOCK();
return 0;
}
+
+int drm_lock_take(struct drm_lock_data *lock_data, unsigned int context)
+{
+ volatile unsigned int *lock = &lock_data->hw_lock->lock;
+ unsigned int old, new;
+
+ do {
+ old = *lock;
+ if (old & _DRM_LOCK_HELD)
+ new = old | _DRM_LOCK_CONT;
+ else
+ new = context | _DRM_LOCK_HELD;
+ } while (!atomic_cmpset_int(lock, old, new));
+
+ if (_DRM_LOCKING_CONTEXT(old) == context) {
+ if (old & _DRM_LOCK_HELD) {
+ if (context != DRM_KERNEL_CONTEXT) {
+ DRM_ERROR("%d holds heavyweight lock\n",
+ context);
+ }
+ return 0;
+ }
+ }
+ if (new == (context | _DRM_LOCK_HELD)) {
+ /* Have lock */
+ return 1;
+ }
+ return 0;
+}
+
+/* This takes a lock forcibly and hands it to context. Should ONLY be used
+ inside *_unlock to give lock to kernel before calling *_dma_schedule. */
+int drm_lock_transfer(struct drm_lock_data *lock_data, unsigned int context)
+{
+ volatile unsigned int *lock = &lock_data->hw_lock->lock;
+ unsigned int old, new;
+
+ lock_data->file_priv = NULL;
+ do {
+ old = *lock;
+ new = context | _DRM_LOCK_HELD;
+ } while (!atomic_cmpset_int(lock, old, new));
+
+ return 1;
+}
+
+int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context)
+{
+ volatile unsigned int *lock = &lock_data->hw_lock->lock;
+ unsigned int old, new;
+
+ lock_data->file_priv = NULL;
+ do {
+ old = *lock;
+ new = 0;
+ } while (!atomic_cmpset_int(lock, old, new));
+
+ if (_DRM_LOCK_IS_HELD(old) && _DRM_LOCKING_CONTEXT(old) != context) {
+ DRM_ERROR("%d freed heavyweight lock held by %d\n",
+ context, _DRM_LOCKING_CONTEXT(old));
+ return 1;
+ }
+ DRM_WAKEUP_INT((void *)&lock_data->lock_queue);
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-05 20:27:49 +0000