[PATCH libdrm 11/25] tegra: Add channel APIs
Thierry Reding
thierry.reding at gmail.com
Fri Aug 27 13:22:51 UTC 2021
From: Thierry Reding <treding at nvidia.com>
These new functions can be used to open a channel to a given engine, map
and unmap buffer objects to that channel, and close the channel.
Signed-off-by: Thierry Reding <treding at nvidia.com>
---
tegra/channel.c | 195 ++++++++++++++++++++++++++++++++++++++++
tegra/meson.build | 2 +-
tegra/private.h | 24 +++++
tegra/tegra-symbols.txt | 5 ++
tegra/tegra.h | 22 +++++
5 files changed, 247 insertions(+), 1 deletion(-)
create mode 100644 tegra/channel.c
diff --git a/tegra/channel.c b/tegra/channel.c
new file mode 100644
index 000000000000..391362023259
--- /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;
+}
diff --git a/tegra/meson.build b/tegra/meson.build
index 9813d9baddac..e115966fc8ed 100644
--- a/tegra/meson.build
+++ b/tegra/meson.build
@@ -22,7 +22,7 @@ libdrm_tegra = library(
'drm_tegra',
[
files(
- 'private.h', 'tegra.c'
+ 'channel.c', 'private.h', 'tegra.c'
),
config_file
],
diff --git a/tegra/private.h b/tegra/private.h
index d0f2944bfb3a..7c05276707bf 100644
--- a/tegra/private.h
+++ b/tegra/private.h
@@ -31,8 +31,17 @@
#include <libdrm_macros.h>
#include <xf86atomic.h>
+#include "tegra_drm.h"
#include "tegra.h"
+enum host1x_class {
+ HOST1X_CLASS_HOST1X = 0x01,
+ HOST1X_CLASS_GR2D = 0x51,
+ HOST1X_CLASS_GR2D_SB = 0x52,
+ HOST1X_CLASS_VIC = 0x5d,
+ HOST1X_CLASS_GR3D = 0x60,
+};
+
struct drm_tegra {
bool close;
int fd;
@@ -48,4 +57,19 @@ struct drm_tegra_bo {
void *map;
};
+struct drm_tegra_channel {
+ struct drm_tegra *drm;
+ enum host1x_class class;
+ uint32_t capabilities;
+ unsigned int version;
+ uint64_t context;
+
+ unsigned int cond_shift;
+};
+
+struct drm_tegra_mapping {
+ struct drm_tegra_channel *channel;
+ uint32_t id;
+};
+
#endif /* __DRM_TEGRA_PRIVATE_H__ */
diff --git a/tegra/tegra-symbols.txt b/tegra/tegra-symbols.txt
index f8811bcd26f4..c16a351171f1 100644
--- a/tegra/tegra-symbols.txt
+++ b/tegra/tegra-symbols.txt
@@ -9,5 +9,10 @@ drm_tegra_bo_ref
drm_tegra_bo_unmap
drm_tegra_bo_unref
drm_tegra_bo_wrap
+drm_tegra_channel_close
+drm_tegra_channel_get_version
+drm_tegra_channel_map
+drm_tegra_channel_open
+drm_tegra_channel_unmap
drm_tegra_close
drm_tegra_new
diff --git a/tegra/tegra.h b/tegra/tegra.h
index 2bcd596e2d61..621fef6b7000 100644
--- a/tegra/tegra.h
+++ b/tegra/tegra.h
@@ -28,6 +28,15 @@
#include <stdint.h>
#include <stdlib.h>
+#include <tegra_drm.h>
+
+enum drm_tegra_class {
+ DRM_TEGRA_HOST1X,
+ DRM_TEGRA_GR2D,
+ DRM_TEGRA_GR3D,
+ DRM_TEGRA_VIC,
+};
+
struct drm_tegra_bo;
struct drm_tegra;
@@ -52,4 +61,17 @@ int drm_tegra_bo_export(struct drm_tegra_bo *bo, uint32_t flags);
int drm_tegra_bo_import(struct drm_tegra *drm, int fd,
struct drm_tegra_bo **bop);
+struct drm_tegra_channel;
+struct drm_tegra_mapping;
+
+int drm_tegra_channel_open(struct drm_tegra *drm,
+ enum drm_tegra_class client,
+ struct drm_tegra_channel **channelp);
+int drm_tegra_channel_close(struct drm_tegra_channel *channel);
+unsigned int drm_tegra_channel_get_version(struct drm_tegra_channel *channel);
+int drm_tegra_channel_map(struct drm_tegra_channel *channel,
+ struct drm_tegra_bo *bo, uint32_t flags,
+ struct drm_tegra_mapping **mapp);
+int drm_tegra_channel_unmap(struct drm_tegra_mapping *map);
+
#endif /* __DRM_TEGRA_H__ */
--
2.32.0
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