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drm/amdkfd: flag added to handle errors from svm validate and map 

If a return error is raised during validation and mapping of a
prange, this flag is set. It is a rare occurrence, but it could happen
when `amdgpu_hmm_range_get_pages_done` returns true. In such cases,
the caller should retry. However, it is important to ensure that the
prange is updated correctly during the retry.

Signed-off-by: Alex Sierra <alex.sierra@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Sierra 2023-05-29 16:01:37 -05:00 committed by Alex Deucher
parent c6a64ad9b7
commit c22b044070
2 changed files with 3 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdkfd/kfd_svm.c
View File

@ -809,7 +809,7 @@ svm_range_is_same_attrs(struct kfd_process *p, struct svm_range *prange,
}
}
return true;
return !prange->is_error_flag;
}
/**
@ -1691,6 +1691,7 @@ unlock_out:
unreserve_out:
svm_range_unreserve_bos(ctx);
prange->is_error_flag = !!r;
if (!r)
prange->validate_timestamp = ktime_get_boottime();

1
drivers/gpu/drm/amd/amdkfd/kfd_svm.h
View File

@ -134,6 +134,7 @@ struct svm_range {
DECLARE_BITMAP(bitmap_aip, MAX_GPU_INSTANCE);
bool validated_once;
bool mapped_to_gpu;
bool is_error_flag;
};
static inline void svm_range_lock(struct svm_range *prange)