1 files changed, 126 insertions, 0 deletions
diff --git a/nouveau/nouveau_channel.c b/nouveau/nouveau_channel.c
new file mode 100644
index 00000000..674c5c37
--- /dev/null
+++ b/nouveau/nouveau_channel.c
@@ -0,0 +1,126 @@
+/*
+ * 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 <string.h>
+#include <errno.h>
+
+#include "nouveau_private.h"
+
+int
+nouveau_channel_alloc(struct nouveau_device *dev, uint32_t fb_ctxdma,
+		      uint32_t tt_ctxdma, struct nouveau_channel **chan)
+{
+	struct nouveau_device_priv *nvdev = nouveau_device(dev);
+	struct nouveau_channel_priv *nvchan;
+	unsigned i;
+	int ret;
+
+	if (!nvdev || !chan || *chan)
+	    return -EINVAL;
+
+	nvchan = calloc(1, sizeof(struct nouveau_channel_priv));
+	if (!nvchan)
+		return -ENOMEM;
+	nvchan->base.device = dev;
+
+	nvchan->drm.fb_ctxdma_handle = fb_ctxdma;
+	nvchan->drm.tt_ctxdma_handle = tt_ctxdma;
+	ret = drmCommandWriteRead(nvdev->fd, DRM_NOUVEAU_CHANNEL_ALLOC,
+				  &nvchan->drm, sizeof(nvchan->drm));
+	if (ret) {
+		free(nvchan);
+		return ret;
+	}
+
+	nvchan->base.id = nvchan->drm.channel;
+	if (nouveau_grobj_ref(&nvchan->base, nvchan->drm.fb_ctxdma_handle,
+			      &nvchan->base.vram) ||
+	    nouveau_grobj_ref(&nvchan->base, nvchan->drm.tt_ctxdma_handle,
+		    	      &nvchan->base.gart)) {
+		nouveau_channel_free((void *)&nvchan);
+		return -EINVAL;
+	}
+
+	/* Mark all DRM-assigned subchannels as in-use */
+	for (i = 0; i < nvchan->drm.nr_subchan; i++) {
+		struct nouveau_grobj_priv *gr = calloc(1, sizeof(*gr));
+
+		gr->base.bound = NOUVEAU_GROBJ_BOUND_EXPLICIT;
+		gr->base.subc = i;
+		gr->base.handle = nvchan->drm.subchan[i].handle;
+		gr->base.grclass = nvchan->drm.subchan[i].grclass;
+		gr->base.channel = &nvchan->base;
+
+		nvchan->base.subc[i].gr = &gr->base;
+	}
+
+	ret = nouveau_bo_wrap(dev, nvchan->drm.notifier_handle,
+			      &nvchan->notifier_bo);
+	if (!ret)
+		ret = nouveau_bo_map(nvchan->notifier_bo, NOUVEAU_BO_RDWR);
+	if (ret) {
+		nouveau_channel_free((void *)&nvchan);
+		return ret;
+	}
+
+	ret = nouveau_grobj_alloc(&nvchan->base, 0x00000000, 0x0030,
+				  &nvchan->base.nullobj);
+	if (ret) {
+		nouveau_channel_free((void *)&nvchan);
+		return ret;
+	}
+
+	nouveau_pushbuf_init(&nvchan->base);
+
+	*chan = &nvchan->base;
+	return 0;
+}
+
+void
+nouveau_channel_free(struct nouveau_channel **chan)
+{
+	struct nouveau_channel_priv *nvchan;
+	struct nouveau_device_priv *nvdev;
+	struct drm_nouveau_channel_free cf;
+
+	if (!chan || !*chan)
+		return;
+	nvchan = nouveau_channel(*chan);
+	*chan = NULL;
+	nvdev = nouveau_device(nvchan->base.device);
+
+	FIRE_RING(&nvchan->base);
+
+	nouveau_bo_unmap(nvchan->notifier_bo);
+	nouveau_bo_ref(NULL, &nvchan->notifier_bo);
+
+	nouveau_grobj_free(&nvchan->base.vram);
+	nouveau_grobj_free(&nvchan->base.gart);
+	nouveau_grobj_free(&nvchan->base.nullobj);
+
+	cf.channel = nvchan->drm.channel;
+	drmCommandWrite(nvdev->fd, DRM_NOUVEAU_CHANNEL_FREE, &cf, sizeof(cf));
+	free(nvchan);
+}
+
+