diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_migrate.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c index 7f689094be5a..3a29d857640b 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c @@ -638,6 +638,22 @@ out_oom: return r; } +/** + * svm_migrate_vma_to_ram - migrate range inside one vma from device to system + * + * @adev: amdgpu device to migrate from + * @prange: svm range structure + * @vma: vm_area_struct that range [start, end] belongs to + * @start: range start virtual address in pages + * @end: range end virtual address in pages + * + * Context: Process context, caller hold mmap read lock, prange->migrate_mutex + * + * Return: + * 0 - success with all pages migrated + * negative values - indicate error + * positive values - partial migration, number of pages not migrated + */ static long svm_migrate_vma_to_ram(struct amdgpu_device *adev, struct svm_range *prange, struct vm_area_struct *vma, uint64_t start, uint64_t end) @@ -709,8 +725,6 @@ out: pdd = svm_range_get_pdd_by_adev(prange, adev); if (pdd) WRITE_ONCE(pdd->page_out, pdd->page_out + cpages); - - return upages; } return r ? r : upages; } @@ -720,7 +734,7 @@ out: * @prange: range structure * @mm: process mm, use current->mm if NULL * - * Context: Process context, caller hold mmap read lock, svms lock, prange lock + * Context: Process context, caller hold mmap read lock, prange->migrate_mutex * * Return: * 0 - OK, otherwise error code @@ -759,13 +773,16 @@ int svm_migrate_vram_to_ram(struct svm_range *prange, struct mm_struct *mm) unsigned long next; vma = find_vma(mm, addr); - if (!vma || addr < vma->vm_start) + if (!vma || addr < vma->vm_start) { + pr_debug("failed to find vma for prange %p\n", prange); + r = -EFAULT; break; + } next = min(vma->vm_end, end); r = svm_migrate_vma_to_ram(adev, prange, vma, addr, next); if (r < 0) { - pr_debug("failed %ld to migrate\n", r); + pr_debug("failed %ld to migrate prange %p\n", r, prange); break; } else { upages += r; @@ -773,7 +790,7 @@ int svm_migrate_vram_to_ram(struct svm_range *prange, struct mm_struct *mm) addr = next; } - if (!upages) { + if (r >= 0 && !upages) { svm_range_vram_node_free(prange); prange->actual_loc = 0; } |