tegra: Add channel APIs
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. Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>main
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/*
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* Copyright © 2012, 2013 Thierry Reding
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* Copyright © 2013 Erik Faye-Lund
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* Copyright © 2014-2021 NVIDIA Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <errno.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include "private.h"
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drm_public int
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drm_tegra_channel_open(struct drm_tegra *drm,
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enum drm_tegra_class client,
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struct drm_tegra_channel **channelp)
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{
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struct drm_tegra_channel_open args;
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struct drm_tegra_channel *channel;
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enum host1x_class class;
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int err;
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switch (client) {
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case DRM_TEGRA_HOST1X:
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class = HOST1X_CLASS_HOST1X;
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break;
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case DRM_TEGRA_GR2D:
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class = HOST1X_CLASS_GR2D;
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break;
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case DRM_TEGRA_GR3D:
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class = HOST1X_CLASS_GR3D;
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break;
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case DRM_TEGRA_VIC:
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class = HOST1X_CLASS_VIC;
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break;
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default:
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return -EINVAL;
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}
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channel = calloc(1, sizeof(*channel));
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if (!channel)
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return -ENOMEM;
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channel->drm = drm;
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memset(&args, 0, sizeof(args));
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args.host1x_class = class;
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err = ioctl(drm->fd, DRM_IOCTL_TEGRA_CHANNEL_OPEN, &args);
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if (err < 0) {
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free(channel);
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return -errno;
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}
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channel->context = args.context;
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channel->version = args.version;
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channel->capabilities = args.capabilities;
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channel->class = class;
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switch (channel->version) {
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case 0x20:
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case 0x30:
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case 0x35:
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case 0x40:
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case 0x21:
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channel->cond_shift = 8;
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break;
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case 0x18:
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case 0x19:
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channel->cond_shift = 10;
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break;
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default:
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return -ENOTSUP;
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}
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*channelp = channel;
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return 0;
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}
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drm_public int drm_tegra_channel_close(struct drm_tegra_channel *channel)
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{
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struct drm_tegra_channel_close args;
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struct drm_tegra *drm;
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int err;
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if (!channel)
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return -EINVAL;
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drm = channel->drm;
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memset(&args, 0, sizeof(args));
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args.context = channel->context;
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err = ioctl(drm->fd, DRM_IOCTL_TEGRA_CHANNEL_CLOSE, &args);
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if (err < 0)
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return -errno;
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free(channel);
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return 0;
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}
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drm_public unsigned int
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drm_tegra_channel_get_version(struct drm_tegra_channel *channel)
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{
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return channel->version;
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}
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drm_public int
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drm_tegra_channel_map(struct drm_tegra_channel *channel,
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struct drm_tegra_bo *bo, uint32_t flags,
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struct drm_tegra_mapping **mapp)
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{
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struct drm_tegra *drm = channel->drm;
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struct drm_tegra_channel_map args;
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struct drm_tegra_mapping *map;
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int err;
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if (!drm || !bo || !mapp)
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return -EINVAL;
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map = calloc(1, sizeof(*map));
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if (!map)
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return -ENOMEM;
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memset(&args, 0, sizeof(args));
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args.context = channel->context;
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args.handle = bo->handle;
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args.flags = flags;
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err = ioctl(drm->fd, DRM_IOCTL_TEGRA_CHANNEL_MAP, &args);
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if (err < 0) {
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free(map);
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return -errno;
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}
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map->channel = channel;
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map->id = args.mapping;
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*mapp = map;
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return 0;
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}
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drm_public int
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drm_tegra_channel_unmap(struct drm_tegra_mapping *map)
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{
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struct drm_tegra_channel *channel = map->channel;
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struct drm_tegra *drm = channel->drm;
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struct drm_tegra_channel_unmap args;
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int err;
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if (!channel || !map)
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return -EINVAL;
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memset(&args, 0, sizeof(args));
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args.context = channel->context;
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args.mapping = map->id;
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err = ioctl(drm->fd, DRM_IOCTL_TEGRA_CHANNEL_UNMAP, &args);
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if (err < 0)
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return -errno;
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free(map);
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return 0;
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}
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@ -22,7 +22,7 @@ libdrm_tegra = library(
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'drm_tegra',
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[
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files(
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'private.h', 'tegra.c'
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'channel.c', 'private.h', 'tegra.c'
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),
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config_file
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],
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#include <libdrm_macros.h>
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#include <xf86atomic.h>
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#include "tegra_drm.h"
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#include "tegra.h"
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enum host1x_class {
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HOST1X_CLASS_HOST1X = 0x01,
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HOST1X_CLASS_GR2D = 0x51,
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HOST1X_CLASS_GR2D_SB = 0x52,
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HOST1X_CLASS_VIC = 0x5d,
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HOST1X_CLASS_GR3D = 0x60,
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};
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struct drm_tegra {
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bool close;
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int fd;
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void *map;
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};
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struct drm_tegra_channel {
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struct drm_tegra *drm;
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enum host1x_class class;
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uint32_t capabilities;
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unsigned int version;
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uint64_t context;
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unsigned int cond_shift;
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};
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struct drm_tegra_mapping {
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struct drm_tegra_channel *channel;
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uint32_t id;
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};
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#endif /* __DRM_TEGRA_PRIVATE_H__ */
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@ -9,5 +9,10 @@ drm_tegra_bo_ref
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drm_tegra_bo_unmap
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drm_tegra_bo_unref
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drm_tegra_bo_wrap
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drm_tegra_channel_close
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drm_tegra_channel_get_version
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drm_tegra_channel_map
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drm_tegra_channel_open
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drm_tegra_channel_unmap
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drm_tegra_close
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drm_tegra_new
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@ -28,6 +28,15 @@
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#include <stdint.h>
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#include <stdlib.h>
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#include <tegra_drm.h>
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enum drm_tegra_class {
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DRM_TEGRA_HOST1X,
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DRM_TEGRA_GR2D,
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DRM_TEGRA_GR3D,
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DRM_TEGRA_VIC,
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};
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struct drm_tegra_bo;
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struct drm_tegra;
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int drm_tegra_bo_import(struct drm_tegra *drm, int fd,
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struct drm_tegra_bo **bop);
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struct drm_tegra_channel;
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struct drm_tegra_mapping;
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int drm_tegra_channel_open(struct drm_tegra *drm,
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enum drm_tegra_class client,
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struct drm_tegra_channel **channelp);
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int drm_tegra_channel_close(struct drm_tegra_channel *channel);
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unsigned int drm_tegra_channel_get_version(struct drm_tegra_channel *channel);
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int drm_tegra_channel_map(struct drm_tegra_channel *channel,
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struct drm_tegra_bo *bo, uint32_t flags,
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struct drm_tegra_mapping **mapp);
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int drm_tegra_channel_unmap(struct drm_tegra_mapping *map);
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#endif /* __DRM_TEGRA_H__ */
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