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Diffstat (limited to 'nouveau/nouveau_channel.c')
-rw-r--r--nouveau/nouveau_channel.c126
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);
+}
+
+