1 files changed, 118 insertions, 0 deletions
diff --git a/src/gallium/winsys/dri/nouveau/nouveau_channel.c b/src/gallium/winsys/dri/nouveau/nouveau_channel.c
new file mode 100644
index 0000000000..df80d04add
--- /dev/null
+++ b/src/gallium/winsys/dri/nouveau/nouveau_channel.c
@@ -0,0 +1,118 @@
+/*
+ * 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_drmif.h"
+#include "nouveau_dma.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;
+	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;
+	}
+
+	ret = drmMap(nvdev->fd, nvchan->drm.ctrl, nvchan->drm.ctrl_size,
+		     (void*)&nvchan->user);
+	if (ret) {
+		nouveau_channel_free((void *)&nvchan);
+		return ret;
+	}
+	nvchan->put     = &nvchan->user[0x40/4];
+	nvchan->get     = &nvchan->user[0x44/4];
+	nvchan->ref_cnt = &nvchan->user[0x48/4];
+
+	ret = drmMap(nvdev->fd, nvchan->drm.notifier, nvchan->drm.notifier_size,
+		     (drmAddressPtr)&nvchan->notifier_block);
+	if (ret) {
+		nouveau_channel_free((void *)&nvchan);
+		return ret;
+	}
+
+	ret = drmMap(nvdev->fd, nvchan->drm.cmdbuf, nvchan->drm.cmdbuf_size,
+		     (void*)&nvchan->pushbuf);
+	if (ret) {
+		nouveau_channel_free((void *)&nvchan);
+		return ret;
+	}
+
+	nouveau_dma_channel_init(&nvchan->base);
+	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_CH(&nvchan->base);
+
+	nouveau_grobj_free(&nvchan->base.vram);
+	nouveau_grobj_free(&nvchan->base.gart);
+
+	cf.channel = nvchan->drm.channel;
+	drmCommandWrite(nvdev->fd, DRM_NOUVEAU_CHANNEL_FREE, &cf, sizeof(cf));
+	free(nvchan);
+}
+
+