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-rw-r--r--tegra/channel.c195
1 files changed, 195 insertions, 0 deletions
diff --git a/tegra/channel.c b/tegra/channel.c
new file mode 100644
index 0000000..3913620
--- /dev/null
+++ b/tegra/channel.c
@@ -0,0 +1,195 @@
+/*
+ * Copyright © 2012, 2013 Thierry Reding
+ * Copyright © 2013 Erik Faye-Lund
+ * Copyright © 2014-2021 NVIDIA Corporation
+ *
+ * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <errno.h>
+#include <string.h>
+
+#include <sys/ioctl.h>
+
+#include "private.h"
+
+drm_public int
+drm_tegra_channel_open(struct drm_tegra *drm,
+ enum drm_tegra_class client,
+ struct drm_tegra_channel **channelp)
+{
+ struct drm_tegra_channel_open args;
+ struct drm_tegra_channel *channel;
+ enum host1x_class class;
+ int err;
+
+ switch (client) {
+ case DRM_TEGRA_HOST1X:
+ class = HOST1X_CLASS_HOST1X;
+ break;
+
+ case DRM_TEGRA_GR2D:
+ class = HOST1X_CLASS_GR2D;
+ break;
+
+ case DRM_TEGRA_GR3D:
+ class = HOST1X_CLASS_GR3D;
+ break;
+
+ case DRM_TEGRA_VIC:
+ class = HOST1X_CLASS_VIC;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ channel = calloc(1, sizeof(*channel));
+ if (!channel)
+ return -ENOMEM;
+
+ channel->drm = drm;
+
+ memset(&args, 0, sizeof(args));
+ args.host1x_class = class;
+
+ err = ioctl(drm->fd, DRM_IOCTL_TEGRA_CHANNEL_OPEN, &args);
+ if (err < 0) {
+ free(channel);
+ return -errno;
+ }
+
+ channel->context = args.context;
+ channel->version = args.version;
+ channel->capabilities = args.capabilities;
+ channel->class = class;
+
+ switch (channel->version) {
+ case 0x20:
+ case 0x30:
+ case 0x35:
+ case 0x40:
+ case 0x21:
+ channel->cond_shift = 8;
+ break;
+
+ case 0x18:
+ case 0x19:
+ channel->cond_shift = 10;
+ break;
+
+ default:
+ return -ENOTSUP;
+ }
+
+ *channelp = channel;
+
+ return 0;
+}
+
+drm_public int drm_tegra_channel_close(struct drm_tegra_channel *channel)
+{
+ struct drm_tegra_channel_close args;
+ struct drm_tegra *drm;
+ int err;
+
+ if (!channel)
+ return -EINVAL;
+
+ drm = channel->drm;
+
+ memset(&args, 0, sizeof(args));
+ args.context = channel->context;
+
+ err = ioctl(drm->fd, DRM_IOCTL_TEGRA_CHANNEL_CLOSE, &args);
+ if (err < 0)
+ return -errno;
+
+ free(channel);
+
+ return 0;
+}
+
+drm_public unsigned int
+drm_tegra_channel_get_version(struct drm_tegra_channel *channel)
+{
+ return channel->version;
+}
+
+drm_public int
+drm_tegra_channel_map(struct drm_tegra_channel *channel,
+ struct drm_tegra_bo *bo, uint32_t flags,
+ struct drm_tegra_mapping **mapp)
+{
+ struct drm_tegra *drm = channel->drm;
+ struct drm_tegra_channel_map args;
+ struct drm_tegra_mapping *map;
+ int err;
+
+ if (!drm || !bo || !mapp)
+ return -EINVAL;
+
+ map = calloc(1, sizeof(*map));
+ if (!map)
+ return -ENOMEM;
+
+ memset(&args, 0, sizeof(args));
+ args.context = channel->context;
+ args.handle = bo->handle;
+ args.flags = flags;
+
+ err = ioctl(drm->fd, DRM_IOCTL_TEGRA_CHANNEL_MAP, &args);
+ if (err < 0) {
+ free(map);
+ return -errno;
+ }
+
+ map->channel = channel;
+ map->id = args.mapping;
+ *mapp = map;
+
+ return 0;
+}
+
+drm_public int
+drm_tegra_channel_unmap(struct drm_tegra_mapping *map)
+{
+ struct drm_tegra_channel *channel = map->channel;
+ struct drm_tegra *drm = channel->drm;
+ struct drm_tegra_channel_unmap args;
+ int err;
+
+ if (!channel || !map)
+ return -EINVAL;
+
+ memset(&args, 0, sizeof(args));
+ args.context = channel->context;
+ args.mapping = map->id;
+
+ err = ioctl(drm->fd, DRM_IOCTL_TEGRA_CHANNEL_UNMAP, &args);
+ if (err < 0)
+ return -errno;
+
+ free(map);
+ return 0;
+}