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Subject[PATCHv2 3/4] drm/tegra: Deliver syncpoint base to user space
Date
This patch adds a separate ioctl for delivering syncpoint base number
to user space. If the syncpoint does not have an associated base, the
function returns -ENXIO.

Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
---
drivers/gpu/host1x/drm/drm.c | 25 +++++++++++++++++++++++++
include/uapi/drm/tegra_drm.h | 26 +++++++++++++++++---------
2 files changed, 42 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/host1x/drm/drm.c b/drivers/gpu/host1x/drm/drm.c
index 8c61cee..c11cbf5 100644
--- a/drivers/gpu/host1x/drm/drm.c
+++ b/drivers/gpu/host1x/drm/drm.c
@@ -472,6 +472,30 @@ static int tegra_get_syncpt(struct drm_device *drm, void *data,
return 0;
}

+static int tegra_get_syncpt_base(struct drm_device *drm, void *data,
+ struct drm_file *file)
+{
+ struct drm_tegra_get_syncpt_base *args = data;
+ struct host1x_drm_file *fpriv = file->driver_priv;
+ struct host1x_drm_context *context =
+ (struct host1x_drm_context *)(uintptr_t)args->context;
+ struct host1x_syncpt_base *base;
+
+ if (!host1x_drm_file_owns_context(fpriv, context))
+ return -ENODEV;
+
+ if (args->index >= context->client->num_syncpts)
+ return -EINVAL;
+
+ base = context->client->syncpts[args->index]->base;
+ if (!base)
+ return -ENXIO;
+
+ args->base_id = base->id;
+
+ return 0;
+}
+
static int tegra_submit(struct drm_device *drm, void *data,
struct drm_file *file)
{
@@ -498,6 +522,7 @@ static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
+ DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT_BASE, tegra_get_syncpt_base, DRM_UNLOCKED),
#endif
};

diff --git a/include/uapi/drm/tegra_drm.h b/include/uapi/drm/tegra_drm.h
index 73bde4e..8b8094c 100644
--- a/include/uapi/drm/tegra_drm.h
+++ b/include/uapi/drm/tegra_drm.h
@@ -65,6 +65,12 @@ struct drm_tegra_get_syncpt {
__u32 id;
};

+struct drm_tegra_get_syncpt_base {
+ __u64 context;
+ __u32 index;
+ __u32 base_id;
+};
+
struct drm_tegra_syncpt {
__u32 id;
__u32 incrs;
@@ -115,15 +121,16 @@ struct drm_tegra_submit {
__u32 reserved[5]; /* future expansion */
};

-#define DRM_TEGRA_GEM_CREATE 0x00
-#define DRM_TEGRA_GEM_MMAP 0x01
-#define DRM_TEGRA_SYNCPT_READ 0x02
-#define DRM_TEGRA_SYNCPT_INCR 0x03
-#define DRM_TEGRA_SYNCPT_WAIT 0x04
-#define DRM_TEGRA_OPEN_CHANNEL 0x05
-#define DRM_TEGRA_CLOSE_CHANNEL 0x06
-#define DRM_TEGRA_GET_SYNCPT 0x07
-#define DRM_TEGRA_SUBMIT 0x08
+#define DRM_TEGRA_GEM_CREATE 0x00
+#define DRM_TEGRA_GEM_MMAP 0x01
+#define DRM_TEGRA_SYNCPT_READ 0x02
+#define DRM_TEGRA_SYNCPT_INCR 0x03
+#define DRM_TEGRA_SYNCPT_WAIT 0x04
+#define DRM_TEGRA_OPEN_CHANNEL 0x05
+#define DRM_TEGRA_CLOSE_CHANNEL 0x06
+#define DRM_TEGRA_GET_SYNCPT 0x07
+#define DRM_TEGRA_SUBMIT 0x08
+#define DRM_TEGRA_GET_SYNCPT_BASE 0x09

#define DRM_IOCTL_TEGRA_GEM_CREATE DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_GEM_CREATE, struct drm_tegra_gem_create)
#define DRM_IOCTL_TEGRA_GEM_MMAP DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_GEM_MMAP, struct drm_tegra_gem_mmap)
@@ -134,5 +141,6 @@ struct drm_tegra_submit {
#define DRM_IOCTL_TEGRA_CLOSE_CHANNEL DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_CLOSE_CHANNEL, struct drm_tegra_open_channel)
#define DRM_IOCTL_TEGRA_GET_SYNCPT DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_GET_SYNCPT, struct drm_tegra_get_syncpt)
#define DRM_IOCTL_TEGRA_SUBMIT DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_SUBMIT, struct drm_tegra_submit)
+#define DRM_IOCTL_TEGRA_GET_SYNCPT_BASE DRM_IOWR(DRM_COMMAND_BASE + DRM_TEGRA_GET_SYNCPT_BASE, struct drm_tegra_get_syncpt_base)

#endif
--
1.8.1.5


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