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-rw-r--r--linux-core/nouveau_fence.c129
1 files changed, 129 insertions, 0 deletions
diff --git a/linux-core/nouveau_fence.c b/linux-core/nouveau_fence.c
new file mode 100644
index 00000000..e510aec7
--- /dev/null
+++ b/linux-core/nouveau_fence.c
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2007 Ben Skeggs.
+ * 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, sublicense, 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 above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * 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 NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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.
+ *
+ */
+
+#include "drmP.h"
+#include "drm.h"
+#include "nouveau_drv.h"
+#include "nouveau_dma.h"
+
+static int
+nouveau_fence_has_irq(struct drm_device *dev, uint32_t class, uint32_t flags)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+
+ DRM_DEBUG("class=%d, flags=0x%08x\n", class, flags);
+
+ /* DRM's channel always uses IRQs to signal fences */
+ if (class == dev_priv->channel.chan->id)
+ return 1;
+
+ /* Other channels don't use IRQs at all yet */
+ return 0;
+}
+
+static int
+nouveau_fence_emit(struct drm_device *dev, uint32_t class, uint32_t flags,
+ uint32_t *breadcrumb, uint32_t *native_type)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nouveau_channel *chan = dev_priv->fifos[class];
+ struct nouveau_drm_channel *dchan = &dev_priv->channel;
+
+ DRM_DEBUG("class=%d, flags=0x%08x\n", class, flags);
+
+ /* We can't emit fences on client channels */
+ if (chan != dchan->chan)
+ return 0;
+
+ *breadcrumb = ++dchan->next_sequence;
+ *native_type = DRM_FENCE_TYPE_EXE;
+
+ BEGIN_RING(NvSubM2MF, NV_MEMORY_TO_MEMORY_FORMAT_SET_REF, 1);
+ OUT_RING (*breadcrumb);
+ BEGIN_RING(NvSubM2MF, NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
+ OUT_RING (NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY_STYLE_WRITE_LE_AWAKEN);
+ BEGIN_RING(NvSubM2MF, NV_MEMORY_TO_MEMORY_FORMAT_NOP, 1);
+ OUT_RING (0);
+ FIRE_RING ();
+
+ return 0;
+}
+
+static void
+nouveau_fence_perform_flush(struct drm_device *dev, uint32_t class)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct drm_fence_class_manager *fc = &dev->fm.fence_class[class];
+ uint32_t pending_types = 0;
+
+ DRM_DEBUG("class=%d\n", class);
+
+ pending_types = fc->pending_flush |
+ ((fc->pending_exe_flush) ? DRM_FENCE_TYPE_EXE : 0);
+
+ if (pending_types) {
+ uint32_t sequence = NV_READ(NV03_FIFO_REGS(class) + 0x48);
+
+ drm_fence_handler(dev, class, sequence, pending_types, 0);
+ }
+}
+
+static void
+nouveau_fence_poke_flush(struct drm_device *dev, uint32_t class)
+{
+ struct drm_fence_manager *fm = &dev->fm;
+ unsigned long flags;
+
+ DRM_DEBUG("class=%d\n", class);
+
+ write_lock_irqsave(&fm->lock, flags);
+ nouveau_fence_perform_flush(dev, class);
+ write_unlock_irqrestore(&fm->lock, flags);
+}
+
+void
+nouveau_fence_handler(struct drm_device *dev, int channel)
+{
+ struct drm_fence_manager *fm = &dev->fm;
+
+ DRM_DEBUG("class=%d\n", channel);
+
+ write_lock(&fm->lock);
+ nouveau_fence_perform_flush(dev, channel);
+ write_unlock(&fm->lock);
+}
+
+struct drm_fence_driver nouveau_fence_driver = {
+ .num_classes = 8,
+ .wrap_diff = (1 << 30),
+ .flush_diff = (1 << 29),
+ .sequence_mask = 0xffffffffU,
+ .lazy_capable = 1,
+ .has_irq = nouveau_fence_has_irq,
+ .emit = nouveau_fence_emit,
+ .poke_flush = nouveau_fence_poke_flush
+};
+