From: Thierry Reding <tred...@nvidia.com>
Document the userspace ABI with kerneldoc to provide some information on
how to use it.
Signed-off-by: Thierry Reding <tred...@nvidia.com>
---
drivers/gpu/drm/tegra/gem.c | 4 +-
include/uapi/drm/tegra_drm.h | 480 ++++++++++++++++++++++++++++++++++-
2 files changed, 468 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c
index 387ba1dfbe0d..e2987a19541d 100644
--- a/drivers/gpu/drm/tegra/gem.c
+++ b/drivers/gpu/drm/tegra/gem.c
@@ -291,10 +291,10 @@ struct tegra_bo *tegra_bo_create(struct drm_device *drm,
size_t size,
if (err < 0)
goto release;
- if (flags & DRM_TEGRA_GEM_CREATE_TILED)
+ if (flags & DRM_TEGRA_GEM_TILED)
bo->tiling.mode = TEGRA_BO_TILING_MODE_TILED;
- if (flags & DRM_TEGRA_GEM_CREATE_BOTTOM_UP)
+ if (flags & DRM_TEGRA_GEM_BOTTOM_UP)
bo->flags |= TEGRA_BO_BOTTOM_UP;
return bo;
diff --git a/include/uapi/drm/tegra_drm.h b/include/uapi/drm/tegra_drm.h
index 99e15d82d1e9..86a7b1e7559d 100644
--- a/include/uapi/drm/tegra_drm.h
+++ b/include/uapi/drm/tegra_drm.h
@@ -29,146 +29,598 @@
extern "C" {
#endif
-#define DRM_TEGRA_GEM_CREATE_TILED (1 << 0)
-#define DRM_TEGRA_GEM_CREATE_BOTTOM_UP (1 << 1)
+#define DRM_TEGRA_GEM_TILED (1 << 0)
+#define DRM_TEGRA_GEM_BOTTOM_UP (1 << 1)
+#define DRM_TEGRA_GEM_FLAGS (DRM_TEGRA_GEM_TILED | \
+ DRM_TEGRA_GEM_BOTTOM_UP)
+/**
+ * struct drm_tegra_gem_create - parameters for the GEM object creation IOCTL
+ */
struct drm_tegra_gem_create {
+ /**
+ * @size:
+ *
+ * The size, in bytes, of the buffer object to be created.
+ */
__u64 size;
+
+ /**
+ * @flags:
+ *
+ * A bitmask of flags that influence the creation of GEM objects:
+ *
+ * DRM_TEGRA_GEM_TILED
+ * Use the 16x16 tiling format for this buffer.
+ *
+ * DRM_TEGRA_GEM_BOTTOM_UP
+ * The buffer has a bottom-up layout.
+ */
__u32 flags;
+
+ /**
+ * @handle:
+ *
+ * Return location for the handle of the created GEM object.
+ */
__u32 handle;
};
+/**
+ * struct drm_tegra_gem_mmap - parameters for the GEM mmap IOCTL
+ */
struct drm_tegra_gem_mmap {
+ /**
+ * @handle:
+ *
+ * Handle of the GEM object to obtain an mmap offset for.
+ */
__u32 handle;
+
+ /**
+ * @pad:
+ *
+ * Structure padding that may be used in the future. Must be 0.
+ */
__u32 pad;
+
+ /**
+ * @offset:
+ *
+ * Return location for the mmap offset for the given GEM object.
+ */
__u64 offset;
};
+/**
+ * struct drm_tegra_syncpt_read - parameters for the read syncpoint IOCTL
+ */
struct drm_tegra_syncpt_read {
+ /**
+ * @id:
+ *
+ * ID of the syncpoint to read the current value from.
+ */
__u32 id;
+
+ /**
+ * @value:
+ *
+ * Return location for the current syncpoint value.
+ */
__u32 value;
};
+/**
+ * struct drm_tegra_syncpt_incr - parameters for the increment syncpoint IOCTL
+ */
struct drm_tegra_syncpt_incr {
+ /**
+ * @id:
+ *
+ * ID of the syncpoint to read the current value from.
+ */
__u32 id;
+
+ /**
+ * @pad:
+ *
+ * Structure padding that may be used in the future. Must be 0.
+ */
__u32 pad;
};
+/**
+ * struct drm_tegra_syncpt_wait - parameters for the wait syncpoint IOCTL
+ */
struct drm_tegra_syncpt_wait {
+ /**
+ * @id:
+ *
+ * ID of the syncpoint to wait on.
+ */
__u32 id;
+
+ /**
+ * @thresh:
+ *
+ * Threshold value for which to wait.
+ */
__u32 thresh;
+
+ /**
+ * @timeout:
+ *
+ * Timeout, in milliseconds, to wait.
+ */
__u32 timeout;
+
+ /**
+ * @value:
+ *
+ * Return value for the current syncpoint value.
+ */
__u32 value;
};
#define DRM_TEGRA_NO_TIMEOUT (0xffffffff)
+/**
+ * struct drm_tegra_open_channel - parameters for the open channel IOCTL
+ */
struct drm_tegra_open_channel {
+ /**
+ * @client:
+ *
+ * The client ID for this channel.
+ */
__u32 client;
+
+ /**
+ * @pad:
+ *
+ * Structure padding that may be used in the future. Must be 0.
+ */
__u32 pad;
+
+ /**
+ * @context:
+ *
+ * Return location for the application context of this channel. This
+ * context needs to be passed to the DRM_TEGRA_CHANNEL_CLOSE or the
+ * DRM_TEGRA_SUBMIT IOCTLs.
+ */
__u64 context;
};
+/**
+ * struct drm_tegra_close_channel - parameters for the close channel IOCTL
+ */
struct drm_tegra_close_channel {
+ /**
+ * @context:
+ *
+ * The application context of this channel. This is obtained from the
+ * DRM_TEGRA_OPEN_CHANNEL IOCTL.
+ */
__u64 context;
};
+/**
+ * struct drm_tegra_get_syncpt - parameters for the get syncpoint IOCTL
+ */
struct drm_tegra_get_syncpt {
+ /**
+ * @context:
+ *
+ * The application context identifying the channel for which to obtain
+ * the syncpoint ID.
+ */
__u64 context;
+
+ /**
+ * @index:
+ *
+ * Channel-relative index of the syncpoint for which to obtain the ID.
+ */
__u32 index;
+
+ /**
+ * @id:
+ *
+ * Return location for the ID of the given syncpoint.
+ */
__u32 id;
};
+/**
+ * struct drm_tegra_get_syncpt_base - parameters for the get wait base IOCTL
+ */
struct drm_tegra_get_syncpt_base {
+ /**
+ * @context:
+ *
+ * The application context identifying for which channel to obtain the
+ * wait base.
+ */
__u64 context;
+
+ /**
+ * @syncpt:
+ *
+ * ID of the syncpoint for which to obtain the wait base.
+ */
__u32 syncpt;
+
+ /**
+ * @id:
+ *
+ * Return location for the ID of the wait base.
+ */
__u32 id;
};
+/**
+ * struct drm_tegra_syncpt - syncpoint increment operation
+ */
struct drm_tegra_syncpt {
+ /**
+ * @id:
+ *
+ * ID of the syncpoint to operate on.
+ */
__u32 id;
+
+ /**
+ * @incrs:
+ *
+ * Number of increments to perform for the syncpoint.
+ */
__u32 incrs;
};
+/**
+ * struct drm_tegra_cmdbuf - structure describing a command buffer
+ */
struct drm_tegra_cmdbuf {
+ /**
+ * @handle:
+ *
+ * Handle to a GEM object containing the command buffer.
+ */
__u32 handle;
+
+ /**
+ * @offset:
+ *
+ * Offset, in bytes, into the GEM object identified by @handle at
+ * which the command buffer starts.
+ */
__u32 offset;
+
+ /**
+ * @words:
+ *
+ * Number of 32-bit words in this command buffer.
+ */
__u32 words;
+
+ /**
+ * @pad:
+ *
+ * Structure padding that may be used in the future. Must be 0.
+ */
__u32 pad;
};
+/**
+ * struct drm_tegra_reloc - GEM object relocation structure
+ */
struct drm_tegra_reloc {
struct {
+ /**
+ * @cmdbuf.handle:
+ *
+ * Handle to the GEM object containing the command buffer for
+ * which to perform this GEM object relocation.
+ */
__u32 handle;
+
+ /**
+ * @cmdbuf.offset:
+ *
+ * Offset into the command buffer at which to insert the the
+ * relocated address.
+ */
__u32 offset;
} cmdbuf;
struct {
+ /**
+ * @target.handle:
+ *
+ * Handle to the GEM object to be relocated.
+ */
__u32 handle;
+
+ /**
+ * @target.offset:
+ *
+ * Offset into the target GEM object at which the relocated
+ * data starts.
+ */
__u32 offset;
} target;
+
+ /**
+ * @shift:
+ *
+ * The number of bits by which to shift relocated addresses.
+ */
__u32 shift;
+
+ /**
+ * @pad:
+ *
+ * Structure padding that may be used in the future. Must be 0.
+ */
__u32 pad;
};
+/**
+ * struct drm_tegra_waitchk - wait check structure
+ */
struct drm_tegra_waitchk {
+ /**
+ * @handle:
+ *
+ * Handle to the GEM object containing a command stream on which to
+ * perform the wait check.
+ */
__u32 handle;
+
+ /**
+ * @offset:
+ *
+ * Offset, in bytes, of the location in the command stream to perform
+ * the wait check on.
+ */
__u32 offset;
+
+ /**
+ * @syncpt:
+ *
+ * ID of the syncpoint to wait check.
+ */
__u32 syncpt;
+
+ /**
+ * @thresh:
+ *
+ * Threshold value for which to check.
+ */
__u32 thresh;
};
+/**
+ * struct drm_tegra_submit - job submission structure
+ */
struct drm_tegra_submit {
+ /**
+ * @context:
+ *
+ * The application context identifying the channel to use for the
+ * execution of this job.
+ */
__u64 context;
+
+ /**
+ * @num_syncpts:
+ *
+ * The number of syncpoints operated on by this job.
+ */
__u32 num_syncpts;
+
+ /**
+ * @num_cmdbufs:
+ *
+ * The number of command buffers to execute as part of this job.
+ */
__u32 num_cmdbufs;
+
+ /**
+ * @num_relocs:
+ *
+ * The number of relocations to perform before executing this job.
+ */
__u32 num_relocs;
+
+ /**
+ * @num_waitchks:
+ *
+ * The number of wait checks to perform as part of this job.
+ */
__u32 num_waitchks;
+
+ /**
+ * @waitchk_mask:
+ *
+ * Bitmask of valid wait checks.
+ */
__u32 waitchk_mask;
+
+ /**
+ * @timeout:
+ *
+ * Timeout, in milliseconds, before this job is cancelled.
+ */
__u32 timeout;
+
+ /**
+ * @syncpts:
+ *
+ * A pointer to @num_syncpts &struct drm_tegra_syncpt structures that
+ * specify the syncpoint operations performed as part of this job.
+ */
__u64 syncpts;
+
+ /**
+ * @cmdbufs:
+ *
+ * A pointer to @num_cmdbufs &struct drm_tegra_cmdbuf_legacy
+ * structures that define the command buffers to execute as part of
+ * this job.
+ */
__u64 cmdbufs;
+
+ /**
+ * @relocs:
+ *
+ * A pointer to @num_relocs &struct drm_tegra_reloc_legacy structures
+ * that specify the relocations that need to be performed before
+ * executing this job.
+ */
__u64 relocs;
+
+ /**
+ * @waitchks:
+ *
+ * A pointer to @num_waitchks &struct drm_tegra_waitchk structures
+ * that specify the wait checks to be performed while executing this
+ * job.
+ */
__u64 waitchks;
- __u32 fence; /* Return value */
- __u32 reserved[5]; /* future expansion */
+ /**
+ * @fence:
+ *
+ * Return location for the threshold of the syncpoint associated with
+ * this job. This can be used with the DRM_TEGRA_SYNCPT_WAIT IOCTL to
+ * wait for this job to be finished.
+ */
+ __u32 fence;
+
+ /**
+ * @reserved:
+ *
+ * This field is reserved for future use. Must be 0.
+ */
+ __u32 reserved[5];
};
#define DRM_TEGRA_GEM_TILING_MODE_PITCH 0
#define DRM_TEGRA_GEM_TILING_MODE_TILED 1
#define DRM_TEGRA_GEM_TILING_MODE_BLOCK 2
+/**
+ * struct drm_tegra_gem_set_tiling - parameters for the set tiling IOCTL
+ */
struct drm_tegra_gem_set_tiling {
- /* input */
+ /**
+ * @handle:
+ *
+ * Handle to the GEM object for which to set the tiling parameters.
+ */
__u32 handle;
+
+ /**
+ * @mode:
+ *
+ * The tiling mode to set. Must be one of:
+ *
+ * DRM_TEGRA_GEM_TILING_MODE_PITCH
+ * pitch linear format
+ *
+ * DRM_TEGRA_GEM_TILING_MODE_TILED
+ * 16x16 tiling format
+ *
+ * DRM_TEGRA_GEM_TILING_MODE_BLOCK
+ * 16Bx2 tiling format
+ */
__u32 mode;
+
+ /**
+ * @value:
+ *
+ * The value to set for the tiling mode parameter.
+ */
__u32 value;
+
+ /**
+ * @pad:
+ *
+ * Structure padding that may be used in the future. Must be 0.
+ */
__u32 pad;
};
+/**
+ * struct drm_tegra_gem_get_tiling - parameters for the get tiling IOCTL
+ */
struct drm_tegra_gem_get_tiling {
- /* input */
+ /**
+ * @handle:
+ *
+ * Handle to the GEM object for which to query the tiling parameters.
+ */
__u32 handle;
- /* output */
+
+ /**
+ * @mode:
+ *
+ * Return location for the tiling mode.
+ */
__u32 mode;
+
+ /**
+ * @value:
+ *
+ * Return location for the tiling mode parameter.
+ */
__u32 value;
+
+ /**
+ * @pad:
+ *
+ * Structure padding that may be used in the future. Must be 0.
+ */
__u32 pad;
};
-#define DRM_TEGRA_GEM_BOTTOM_UP (1 << 0)
-#define DRM_TEGRA_GEM_FLAGS (DRM_TEGRA_GEM_BOTTOM_UP)
-
+/**
+ * struct drm_tegra_gem_set_flags - parameters for the set flags IOCTL
+ */
struct drm_tegra_gem_set_flags {
- /* input */
+ /**
+ * @handle:
+ *
+ * Handle to the GEM object for which to set the flags.
+ */
__u32 handle;
- /* output */
+
+ /**
+ * @flags:
+ *
+ * The flags to set for the GEM object.
+ */
__u32 flags;
};
+/**
+ * struct drm_tegra_gem_get_flags - parameters for the get flags IOCTL
+ */
struct drm_tegra_gem_get_flags {
- /* input */
+ /**
+ * @handle:
+ *
+ * Handle to the GEM object for which to query the flags.
+ */
__u32 handle;
- /* output */
+
+ /**
+ * @flags:
+ *
+ * Return location for the flags queried from the GEM object.
+ */
__u32 flags;
};
--
2.17.0
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