Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / gpu / drm / radeon / radeon_semaphore.c

diff --git a/kernel/drivers/gpu/drm/radeon/radeon_semaphore.c b/kernel/drivers/gpu/drm/radeon/radeon_semaphore.c
new file mode 100644 (file)
index 0000000..e6ad54c
--- /dev/null
+++ b/kernel/drivers/gpu/drm/radeon/radeon_semaphore.c
@@ -0,0 +1,106 @@
+/*
+ * 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 <drm/drmP.h>
+#include "radeon.h"
+#include "radeon_trace.h"
+
+int radeon_semaphore_create(struct radeon_device *rdev,
+                           struct radeon_semaphore **semaphore)
+{
+       int r;
+
+       *semaphore = kmalloc(sizeof(struct radeon_semaphore), GFP_KERNEL);
+       if (*semaphore == NULL) {
+               return -ENOMEM;
+       }
+       r = radeon_sa_bo_new(rdev, &rdev->ring_tmp_bo,
+                            &(*semaphore)->sa_bo, 8, 8);
+       if (r) {
+               kfree(*semaphore);
+               *semaphore = NULL;
+               return r;
+       }
+       (*semaphore)->waiters = 0;
+       (*semaphore)->gpu_addr = radeon_sa_bo_gpu_addr((*semaphore)->sa_bo);
+
+       *((uint64_t *)radeon_sa_bo_cpu_addr((*semaphore)->sa_bo)) = 0;
+
+       return 0;
+}
+
+bool radeon_semaphore_emit_signal(struct radeon_device *rdev, int ridx,
+                                 struct radeon_semaphore *semaphore)
+{
+       struct radeon_ring *ring = &rdev->ring[ridx];
+
+       trace_radeon_semaphore_signale(ridx, semaphore);
+
+       if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, false)) {
+               --semaphore->waiters;
+
+               /* for debugging lockup only, used by sysfs debug files */
+               ring->last_semaphore_signal_addr = semaphore->gpu_addr;
+               return true;
+       }
+       return false;
+}
+
+bool radeon_semaphore_emit_wait(struct radeon_device *rdev, int ridx,
+                               struct radeon_semaphore *semaphore)
+{
+       struct radeon_ring *ring = &rdev->ring[ridx];
+
+       trace_radeon_semaphore_wait(ridx, semaphore);
+
+       if (radeon_semaphore_ring_emit(rdev, ridx, ring, semaphore, true)) {
+               ++semaphore->waiters;
+
+               /* for debugging lockup only, used by sysfs debug files */
+               ring->last_semaphore_wait_addr = semaphore->gpu_addr;
+               return true;
+       }
+       return false;
+}
+
+void radeon_semaphore_free(struct radeon_device *rdev,
+                          struct radeon_semaphore **semaphore,
+                          struct radeon_fence *fence)
+{
+       if (semaphore == NULL || *semaphore == NULL) {
+               return;
+       }
+       if ((*semaphore)->waiters > 0) {
+               dev_err(rdev->dev, "semaphore %p has more waiters than signalers,"
+                       " hardware lockup imminent!\n", *semaphore);
+       }
+       radeon_sa_bo_free(rdev, &(*semaphore)->sa_bo, fence);
+       kfree(*semaphore);
+       *semaphore = NULL;
+}