diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_svm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index b0c1c7172a45..041342fa2a14 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -46,6 +46,12 @@ */ #define AMDGPU_SVM_RANGE_RETRY_FAULT_PENDING (2UL * NSEC_PER_MSEC) +/* Giant svm range split into smaller ranges based on this, it is decided using + * minimum of all dGPU/APU 1/32 VRAM size, between 2MB to 1GB and alignment to + * power of 2MB. + */ +static uint64_t max_svm_range_pages; + struct criu_svm_metadata { struct list_head list; struct kfd_criu_svm_range_priv_data data; @@ -1870,6 +1876,21 @@ static struct svm_range *svm_range_clone(struct svm_range *old) return new; } +void svm_range_set_max_pages(struct amdgpu_device *adev) +{ + uint64_t max_pages; + uint64_t pages, _pages; + + /* 1/32 VRAM size in pages */ + pages = adev->gmc.real_vram_size >> 17; + pages = clamp(pages, 1ULL << 9, 1ULL << 18); + pages = rounddown_pow_of_two(pages); + do { + max_pages = READ_ONCE(max_svm_range_pages); + _pages = min_not_zero(max_pages, pages); + } while (cmpxchg(&max_svm_range_pages, max_pages, _pages) != max_pages); +} + /** * svm_range_add - add svm range and handle overlap * @p: the range add to this process svms |