On 2019-02-21 12:48 p.m., Yang, Philip wrote:
> Only select HMM_MIRROR will get kernel config dependency warnings
> if CONFIG_HMM is missing in the config. Add depends on HMM will
> solve the issue.
>
> Add conditional compilation to fix compilation errors if HMM_MIRROR
> is not enabled as HMM config is not enabled.
>
> Change-Id: I1b44a0b5285bbef5e98bfb045d1d82c167af1cb8
> Signed-off-by: Philip Yang <philip.y...@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehl...@amd.com>
See one semi-related comment inline ...
> ---
> drivers/gpu/drm/amd/amdgpu/Kconfig | 1 +
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 6 ++++++
> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 12 ++++++++++++
> 3 files changed, 19 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/Kconfig
> b/drivers/gpu/drm/amd/amdgpu/Kconfig
> index 960a63355705..67553effb649 100644
> --- a/drivers/gpu/drm/amd/amdgpu/Kconfig
> +++ b/drivers/gpu/drm/amd/amdgpu/Kconfig
> @@ -26,6 +26,7 @@ config DRM_AMDGPU_CIK
> config DRM_AMDGPU_USERPTR
> bool "Always enable userptr write support"
> depends on DRM_AMDGPU
> + depends on ARCH_HAS_HMM
> select HMM_MIRROR
> help
> This option selects CONFIG_HMM and CONFIG_HMM_MIRROR if it
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index 1e675048f790..c1dbca14dce5 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -712,7 +712,9 @@ struct amdgpu_ttm_tt {
> uint64_t userptr;
> struct task_struct *usertask;
> uint32_t userflags;
> +#if IS_ENABLED(CONFIG_DRM_AMDGPU_USERPTR)
> struct hmm_range range;
> +#endif
> };
>
> /**
> @@ -722,6 +724,7 @@ struct amdgpu_ttm_tt {
> * Calling function must call amdgpu_ttm_tt_userptr_range_done() once and
> only
> * once afterwards to stop HMM tracking
> */
> +#if IS_ENABLED(CONFIG_DRM_AMDGPU_USERPTR)
> int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct page **pages)
> {
> struct amdgpu_ttm_tt *gtt = (void *)ttm;
> @@ -804,6 +807,7 @@ bool amdgpu_ttm_tt_get_user_pages_done(struct ttm_tt *ttm)
>
> return r;
> }
> +#endif
>
> /**
> * amdgpu_ttm_tt_set_user_pages - Copy pages in, putting old pages as
> necessary.
> @@ -904,9 +908,11 @@ static void amdgpu_ttm_tt_unpin_userptr(struct ttm_tt
> *ttm)
>
> sg_free_table(ttm->sg);
>
> +#if IS_ENABLED(CONFIG_DRM_AMDGPU_USERPTR)
> if (gtt->range.pfns &&
> ttm->pages[0] == hmm_pfn_to_page(>t->range, gtt->range.pfns[0]))
> WARN_ONCE(1, "Missing get_user_page_done\n");
> +#endif
> }
>
> int amdgpu_ttm_gart_bind(struct amdgpu_device *adev,
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> index 8988c87fff9d..c9d87271a4cb 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
> @@ -101,8 +101,20 @@ int amdgpu_mmap(struct file *filp, struct vm_area_struct
> *vma);
> int amdgpu_ttm_alloc_gart(struct ttm_buffer_object *bo);
> int amdgpu_ttm_recover_gart(struct ttm_buffer_object *tbo);
>
> +#if IS_ENABLED(CONFIG_DRM_AMDGPU_USERPTR)
> int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct page **pages);
> bool amdgpu_ttm_tt_get_user_pages_done(struct ttm_tt *ttm);
> +#else
> +static inline int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct
> page **pages)
> +{
> + return -EPERM;
> +}
> +static inline bool amdgpu_ttm_tt_get_user_pages_done(struct ttm_tt *ttm)
> +{
> + return false;
> +}
> +#endif
> +
> void amdgpu_ttm_tt_set_user_pages(struct ttm_tt *ttm, struct page **pages);
> void amdgpu_ttm_tt_mark_user_pages(struct ttm_tt *ttm);
mark_user_pages isn't used any more. This function could be removed.
Regards,
Felix
> int amdgpu_ttm_tt_set_userptr(struct ttm_tt *ttm, uint64_t addr,
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