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drm/tegra: Implement syncpoint wait UAPI 

Implement new syncpoint wait UAPI. This is different from the
legacy one in taking an absolute timestamp in line with modern
DRM conventions.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This commit is contained in:
Mikko Perttunen 2021-06-10 14:04:53 +03:00 committed by Thierry Reding
parent fc34833640
commit 44e9613813
3 changed files with 15 additions and 28 deletions
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2
drivers/gpu/drm/tegra/drm.c
View File

@ -732,6 +732,8 @@ static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(TEGRA_SYNCPOINT_FREE, tegra_drm_ioctl_syncpoint_free,
DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(TEGRA_SYNCPOINT_WAIT, tegra_drm_ioctl_syncpoint_wait,
DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_RENDER_ALLOW),
DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_RENDER_ALLOW),

39
drivers/gpu/drm/tegra/uapi.c
View File

@ -7,6 +7,7 @@
#include <drm/drm_drv.h>
#include <drm/drm_file.h>
#include <drm/drm_utils.h>
#include "drm.h"
#include "uapi.h"
@ -317,39 +318,21 @@ int tegra_drm_ioctl_syncpoint_free(struct drm_device *drm, void *data, struct dr
return 0;
}
int tegra_drm_ioctl_gem_create(struct drm_device *drm, void *data,
struct drm_file *file)
int tegra_drm_ioctl_syncpoint_wait(struct drm_device *drm, void *data, struct drm_file *file)
{
struct drm_tegra_gem_create *args = data;
struct tegra_bo *bo;
struct host1x *host1x = tegra_drm_to_host1x(drm->dev_private);
struct drm_tegra_syncpoint_wait *args = data;
signed long timeout_jiffies;
struct host1x_syncpt *sp;
if (args->flags)
if (args->padding != 0)
return -EINVAL;
bo = tegra_bo_create_with_handle(file, drm, args->size, args->flags,
&args->handle);
if (IS_ERR(bo))
return PTR_ERR(bo);
return 0;
}
int tegra_drm_ioctl_gem_mmap(struct drm_device *drm, void *data,
struct drm_file *file)
{
struct drm_tegra_gem_mmap *args = data;
struct drm_gem_object *gem;
struct tegra_bo *bo;
gem = drm_gem_object_lookup(file, args->handle);
if (!gem)
sp = host1x_syncpt_get_by_id_noref(host1x, args->id);
if (!sp)
return -EINVAL;
bo = to_tegra_bo(gem);
timeout_jiffies = drm_timeout_abs_to_jiffies(args->timeout_ns);
args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
drm_gem_object_put(gem);
return 0;
return host1x_syncpt_wait(sp, args->threshold, timeout_jiffies, &args->value);
}

2
drivers/gpu/drm/tegra/uapi.h
View File

@ -49,6 +49,8 @@ int tegra_drm_ioctl_syncpoint_allocate(struct drm_device *drm, void *data,
struct drm_file *file);
int tegra_drm_ioctl_syncpoint_free(struct drm_device *drm, void *data,
struct drm_file *file);
int tegra_drm_ioctl_syncpoint_wait(struct drm_device *drm, void *data,
struct drm_file *file);
void tegra_drm_uapi_close_file(struct tegra_drm_file *file);
void tegra_drm_mapping_put(struct tegra_drm_mapping *mapping);