1 files changed, 137 insertions, 0 deletions
diff --git a/src/gallium/winsys/drm/nouveau/nouveau_notifier.c b/src/gallium/winsys/drm/nouveau/nouveau_notifier.c
new file mode 100644
index 00000000000..01e8f38440e
--- /dev/null
+++ b/src/gallium/winsys/drm/nouveau/nouveau_notifier.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright 2007 Nouveau Project
+ *
+ * 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 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 AUTHORS 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 <stdlib.h>
+#include <errno.h>
+
+#include "nouveau_drmif.h"
+#include "nouveau_local.h"
+
+#define NOTIFIER(__v)                                                          \
+	struct nouveau_notifier_priv *nvnotify = nouveau_notifier(notifier);   \
+	volatile uint32_t *__v = (void*)nvnotify->map + (id * 32)
+
+int
+nouveau_notifier_alloc(struct nouveau_channel *chan, uint32_t handle,
+		       int count, struct nouveau_notifier **notifier)
+{
+	struct nouveau_notifier_priv *nvnotify;
+	int ret;
+
+	if (!chan || !notifier || *notifier)
+		return -EINVAL;
+
+	nvnotify = calloc(1, sizeof(struct nouveau_notifier_priv));
+	if (!nvnotify)
+		return -ENOMEM;
+	nvnotify->base.channel = chan;
+	nvnotify->base.handle  = handle;
+
+	nvnotify->drm.channel = chan->id;
+	nvnotify->drm.handle  = handle;
+	nvnotify->drm.count   = count;
+	if ((ret = drmCommandWriteRead(nouveau_device(chan->device)->fd,
+				       DRM_NOUVEAU_NOTIFIEROBJ_ALLOC,
+				       &nvnotify->drm,
+				       sizeof(nvnotify->drm)))) {
+		nouveau_notifier_free((void *)&nvnotify);
+		return ret;
+	}
+
+	nvnotify->map = (void *)nouveau_channel(chan)->notifier_block +
+				nvnotify->drm.offset;
+	*notifier = &nvnotify->base;
+	return 0;
+}
+
+void
+nouveau_notifier_free(struct nouveau_notifier **notifier)
+{
+
+	struct nouveau_notifier_priv *nvnotify;
+	struct nouveau_channel_priv *nvchan;
+	struct nouveau_device_priv *nvdev;
+	struct drm_nouveau_gpuobj_free f;
+
+	if (!notifier || !*notifier)
+		return;
+	nvnotify = nouveau_notifier(*notifier);
+	*notifier = NULL;
+
+	nvchan = nouveau_channel(nvnotify->base.channel);
+	nvdev   = nouveau_device(nvchan->base.device);
+
+	f.channel = nvchan->drm.channel;
+	f.handle  = nvnotify->base.handle;
+	drmCommandWrite(nvdev->fd, DRM_NOUVEAU_GPUOBJ_FREE, &f, sizeof(f));		
+	free(nvnotify);
+}
+
+void
+nouveau_notifier_reset(struct nouveau_notifier *notifier, int id)
+{
+	NOTIFIER(n);
+
+	n[NV_NOTIFY_TIME_0      /4] = 0x00000000;
+	n[NV_NOTIFY_TIME_1      /4] = 0x00000000;
+	n[NV_NOTIFY_RETURN_VALUE/4] = 0x00000000;
+	n[NV_NOTIFY_STATE       /4] = (NV_NOTIFY_STATE_STATUS_IN_PROCESS <<
+				       NV_NOTIFY_STATE_STATUS_SHIFT);
+}
+
+uint32_t
+nouveau_notifier_status(struct nouveau_notifier *notifier, int id)
+{
+	NOTIFIER(n);
+
+	return n[NV_NOTIFY_STATE/4] >> NV_NOTIFY_STATE_STATUS_SHIFT;
+}
+
+uint32_t
+nouveau_notifier_return_val(struct nouveau_notifier *notifier, int id)
+{
+	NOTIFIER(n);
+
+	return n[NV_NOTIFY_RETURN_VALUE/4];
+}
+
+int
+nouveau_notifier_wait_status(struct nouveau_notifier *notifier, int id,
+			     int status, int timeout)
+{
+	NOTIFIER(n);
+	uint32_t time = 0, t_start = NOUVEAU_TIME_MSEC();
+
+	while (time <= timeout) {
+		uint32_t v;
+
+		v = n[NV_NOTIFY_STATE/4] >> NV_NOTIFY_STATE_STATUS_SHIFT;
+		if (v == status)
+			return 0;
+
+		if (timeout)
+			time = NOUVEAU_TIME_MSEC() - t_start;
+	}
+
+	return -EBUSY;
+}
+