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path: root/drivers/gpu/drm/radeon/radeon_semaphore.c
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Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_semaphore.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_semaphore.c178
1 files changed, 178 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_semaphore.c b/drivers/gpu/drm/radeon/radeon_semaphore.c
new file mode 100644
index 000000000000..61dd4e3c9209
--- /dev/null
+++ b/drivers/gpu/drm/radeon/radeon_semaphore.c
@@ -0,0 +1,178 @@
+/*
+ * Copyright 2011 Christian König.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+ * USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ */
+/*
+ * Authors:
+ * Christian König <deathsimple@vodafone.de>
+ */
+#include "drmP.h"
+#include "drm.h"
+#include "radeon.h"
+
+static int radeon_semaphore_add_bo(struct radeon_device *rdev)
+{
+ struct radeon_semaphore_bo *bo;
+ unsigned long irq_flags;
+ uint64_t gpu_addr;
+ uint32_t *cpu_ptr;
+ int r, i;
+
+
+ bo = kmalloc(sizeof(struct radeon_semaphore_bo), GFP_KERNEL);
+ if (bo == NULL) {
+ return -ENOMEM;
+ }
+ INIT_LIST_HEAD(&bo->free);
+ INIT_LIST_HEAD(&bo->list);
+ bo->nused = 0;
+
+ r = radeon_ib_get(rdev, 0, &bo->ib, RADEON_SEMAPHORE_BO_SIZE);
+ if (r) {
+ dev_err(rdev->dev, "failed to get a bo after 5 retry\n");
+ kfree(bo);
+ return r;
+ }
+ gpu_addr = rdev->ib_pool.sa_manager.gpu_addr;
+ gpu_addr += bo->ib->sa_bo.offset;
+ cpu_ptr = rdev->ib_pool.sa_manager.cpu_ptr;
+ cpu_ptr += (bo->ib->sa_bo.offset >> 2);
+ for (i = 0; i < (RADEON_SEMAPHORE_BO_SIZE/8); i++) {
+ bo->semaphores[i].gpu_addr = gpu_addr;
+ bo->semaphores[i].cpu_ptr = cpu_ptr;
+ bo->semaphores[i].bo = bo;
+ list_add_tail(&bo->semaphores[i].list, &bo->free);
+ gpu_addr += 8;
+ cpu_ptr += 2;
+ }
+ write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
+ list_add_tail(&bo->list, &rdev->semaphore_drv.bo);
+ write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
+ return 0;
+}
+
+static void radeon_semaphore_del_bo_locked(struct radeon_device *rdev,
+ struct radeon_semaphore_bo *bo)
+{
+ radeon_sa_bo_free(rdev, &bo->ib->sa_bo);
+ radeon_fence_unref(&bo->ib->fence);
+ list_del(&bo->list);
+ kfree(bo);
+}
+
+void radeon_semaphore_shrink_locked(struct radeon_device *rdev)
+{
+ struct radeon_semaphore_bo *bo, *n;
+
+ if (list_empty(&rdev->semaphore_drv.bo)) {
+ return;
+ }
+ /* only shrink if first bo has free semaphore */
+ bo = list_first_entry(&rdev->semaphore_drv.bo, struct radeon_semaphore_bo, list);
+ if (list_empty(&bo->free)) {
+ return;
+ }
+ list_for_each_entry_safe_continue(bo, n, &rdev->semaphore_drv.bo, list) {
+ if (bo->nused)
+ continue;
+ radeon_semaphore_del_bo_locked(rdev, bo);
+ }
+}
+
+int radeon_semaphore_create(struct radeon_device *rdev,
+ struct radeon_semaphore **semaphore)
+{
+ struct radeon_semaphore_bo *bo;
+ unsigned long irq_flags;
+ bool do_retry = true;
+ int r;
+
+retry:
+ *semaphore = NULL;
+ write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
+ list_for_each_entry(bo, &rdev->semaphore_drv.bo, list) {
+ if (list_empty(&bo->free))
+ continue;
+ *semaphore = list_first_entry(&bo->free, struct radeon_semaphore, list);
+ (*semaphore)->cpu_ptr[0] = 0;
+ (*semaphore)->cpu_ptr[1] = 0;
+ list_del(&(*semaphore)->list);
+ bo->nused++;
+ break;
+ }
+ write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
+
+ if (*semaphore == NULL) {
+ if (do_retry) {
+ do_retry = false;
+ r = radeon_semaphore_add_bo(rdev);
+ if (r)
+ return r;
+ goto retry;
+ }
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+void radeon_semaphore_emit_signal(struct radeon_device *rdev, int ring,
+ struct radeon_semaphore *semaphore)
+{
+ radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, false);
+}
+
+void radeon_semaphore_emit_wait(struct radeon_device *rdev, int ring,
+ struct radeon_semaphore *semaphore)
+{
+ radeon_semaphore_ring_emit(rdev, ring, &rdev->ring[ring], semaphore, true);
+}
+
+void radeon_semaphore_free(struct radeon_device *rdev,
+ struct radeon_semaphore *semaphore)
+{
+ unsigned long irq_flags;
+
+ write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
+ semaphore->bo->nused--;
+ list_add_tail(&semaphore->list, &semaphore->bo->free);
+ radeon_semaphore_shrink_locked(rdev);
+ write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
+}
+
+void radeon_semaphore_driver_fini(struct radeon_device *rdev)
+{
+ struct radeon_semaphore_bo *bo, *n;
+ unsigned long irq_flags;
+
+ write_lock_irqsave(&rdev->semaphore_drv.lock, irq_flags);
+ /* we force to free everything */
+ list_for_each_entry_safe(bo, n, &rdev->semaphore_drv.bo, list) {
+ if (!list_empty(&bo->free)) {
+ dev_err(rdev->dev, "still in use semaphore\n");
+ }
+ radeon_semaphore_del_bo_locked(rdev, bo);
+ }
+ write_unlock_irqrestore(&rdev->semaphore_drv.lock, irq_flags);
+}