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drm/msm: Add hint to DRM_IOCTL_MSM_GEM_INFO to return an object IOVA

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Modify the 'pad' member of struct drm_msm_gem_info to 'flags'. If the
user sets 'flags' to non-zero it means that they want a IOVA for the
GEM object instead of a mmap() offset. Return the iova in the 'offset'
member.

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
[robclark: s/hint/flags in commit msg]
Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Jordan Crouse 2017-05-08 14:35:01 -06:00 • committed by Rob Clark
parent e895c7bd31
commit 49fd08baa3
2 changed files with 27 additions and 4 deletions
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8
include/uapi/drm/msm_drm.h
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@ -104,10 +104,14 @@ struct drm_msm_gem_new {
__u32 handle; /* out */
};
#define MSM_INFO_IOVA 0x01
#define MSM_INFO_FLAGS (MSM_INFO_IOVA)
struct drm_msm_gem_info {
__u32 handle; /* in */
__u32 pad;
__u64 offset; /* out, offset to pass to mmap() */
__u32 flags; /* in - combination of MSM_INFO_* flags */
__u64 offset; /* out, mmap() offset or iova */
};
#define MSM_PREP_READ 0x01