Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 157 insertions, 0 deletions

diff --git a/drivers/gpu/drm/msm/msm_fence.c b/drivers/gpu/drm/msm/msm_fence.c
new file mode 100644
index 000000000..6c11be795
--- /dev/null
+++ b/drivers/gpu/drm/msm/msm_fence.c
@@ -0,0 +1,157 @@
+/*
+ * Copyright (C) 2013-2016 Red Hat
+ * Author: Rob Clark <robdclark@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/dma-fence.h>
+
+#include "msm_drv.h"
+#include "msm_fence.h"
+
+
+struct msm_fence_context *
+msm_fence_context_alloc(struct drm_device *dev, const char *name)
+{
+	struct msm_fence_context *fctx;
+
+	fctx = kzalloc(sizeof(*fctx), GFP_KERNEL);
+	if (!fctx)
+		return ERR_PTR(-ENOMEM);
+
+	fctx->dev = dev;
+	strncpy(fctx->name, name, sizeof(fctx->name));
+	fctx->context = dma_fence_context_alloc(1);
+	init_waitqueue_head(&fctx->event);
+	spin_lock_init(&fctx->spinlock);
+
+	return fctx;
+}
+
+void msm_fence_context_free(struct msm_fence_context *fctx)
+{
+	kfree(fctx);
+}
+
+static inline bool fence_completed(struct msm_fence_context *fctx, uint32_t fence)
+{
+	return (int32_t)(fctx->completed_fence - fence) >= 0;
+}
+
+/* legacy path for WAIT_FENCE ioctl: */
+int msm_wait_fence(struct msm_fence_context *fctx, uint32_t fence,
+		ktime_t *timeout, bool interruptible)
+{
+	int ret;
+
+	if (fence > fctx->last_fence) {
+		DRM_ERROR_RATELIMITED("%s: waiting on invalid fence: %u (of %u)\n",
+				fctx->name, fence, fctx->last_fence);
+		return -EINVAL;
+	}
+
+	if (!timeout) {
+		/* no-wait: */
+		ret = fence_completed(fctx, fence) ? 0 : -EBUSY;
+	} else {
+		unsigned long remaining_jiffies = timeout_to_jiffies(timeout);
+
+		if (interruptible)
+			ret = wait_event_interruptible_timeout(fctx->event,
+				fence_completed(fctx, fence),
+				remaining_jiffies);
+		else
+			ret = wait_event_timeout(fctx->event,
+				fence_completed(fctx, fence),
+				remaining_jiffies);
+
+		if (ret == 0) {
+			DBG("timeout waiting for fence: %u (completed: %u)",
+					fence, fctx->completed_fence);
+			ret = -ETIMEDOUT;
+		} else if (ret != -ERESTARTSYS) {
+			ret = 0;
+		}
+	}
+
+	return ret;
+}
+
+/* called from workqueue */
+void msm_update_fence(struct msm_fence_context *fctx, uint32_t fence)
+{
+	spin_lock(&fctx->spinlock);
+	fctx->completed_fence = max(fence, fctx->completed_fence);
+	spin_unlock(&fctx->spinlock);
+
+	wake_up_all(&fctx->event);
+}
+
+struct msm_fence {
+	struct dma_fence base;
+	struct msm_fence_context *fctx;
+};
+
+static inline struct msm_fence *to_msm_fence(struct dma_fence *fence)
+{
+	return container_of(fence, struct msm_fence, base);
+}
+
+static const char *msm_fence_get_driver_name(struct dma_fence *fence)
+{
+	return "msm";
+}
+
+static const char *msm_fence_get_timeline_name(struct dma_fence *fence)
+{
+	struct msm_fence *f = to_msm_fence(fence);
+	return f->fctx->name;
+}
+
+static bool msm_fence_enable_signaling(struct dma_fence *fence)
+{
+	return true;
+}
+
+static bool msm_fence_signaled(struct dma_fence *fence)
+{
+	struct msm_fence *f = to_msm_fence(fence);
+	return fence_completed(f->fctx, f->base.seqno);
+}
+
+static const struct dma_fence_ops msm_fence_ops = {
+	.get_driver_name = msm_fence_get_driver_name,
+	.get_timeline_name = msm_fence_get_timeline_name,
+	.enable_signaling = msm_fence_enable_signaling,
+	.signaled = msm_fence_signaled,
+	.wait = dma_fence_default_wait,
+	.release = dma_fence_free,
+};
+
+struct dma_fence *
+msm_fence_alloc(struct msm_fence_context *fctx)
+{
+	struct msm_fence *f;
+
+	f = kzalloc(sizeof(*f), GFP_KERNEL);
+	if (!f)
+		return ERR_PTR(-ENOMEM);
+
+	f->fctx = fctx;
+
+	dma_fence_init(&f->base, &msm_fence_ops, &fctx->spinlock,
+		       fctx->context, ++fctx->last_fence);
+
+	return &f->base;
+}