drm/xe/xe_vm.c

3261 	} snap[];
3267 	struct xe_vm_snapshot *snap = NULL;
3280 		snap = kvzalloc(offsetof(struct xe_vm_snapshot, snap[num_snaps]), GFP_NOWAIT);
3281 	if (!snap) {
3282 		snap = num_snaps ? ERR_PTR(-ENOMEM) : ERR_PTR(-ENODEV);
3286 	snap->num_snaps = num_snaps;
3296 		snap->snap[i].ofs = xe_vma_start(vma);
3297 		snap->snap[i].len = xe_vma_size(vma);
3299 			snap->snap[i].bo = xe_bo_get(bo);
3300 			snap->snap[i].bo_ofs = xe_vma_bo_offset(vma);
3306 				snap->snap[i].mm = mm;
3308 				snap->snap[i].data = ERR_PTR(-EFAULT);
3310 			snap->snap[i].bo_ofs = xe_vma_userptr(vma);
3312 			snap->snap[i].data = ERR_PTR(-ENOENT);
3319 	return snap;
3322 void xe_vm_snapshot_capture_delayed(struct xe_vm_snapshot *snap)
3324 	if (IS_ERR_OR_NULL(snap))
3327 	for (int i = 0; i < snap->num_snaps; i++) {
3328 		struct xe_bo *bo = snap->snap[i].bo;
3332 		if (IS_ERR(snap->snap[i].data))
3335 		snap->snap[i].data = kvmalloc(snap->snap[i].len, GFP_USER);
3336 		if (!snap->snap[i].data) {
3337 			snap->snap[i].data = ERR_PTR(-ENOMEM);
3346 						   snap->snap[i].data,
3347 						   &src, snap->snap[i].bo_ofs,
3348 						   snap->snap[i].len);
3353 			void __user *userptr = (void __user *)(size_t)snap->snap[i].bo_ofs;
3355 			kthread_use_mm(snap->snap[i].mm);
3356 			if (!copy_from_user(snap->snap[i].data, userptr, snap->snap[i].len))
3360 			kthread_unuse_mm(snap->snap[i].mm);
3362 			mmput(snap->snap[i].mm);
3363 			snap->snap[i].mm = NULL;
3367 			kvfree(snap->snap[i].data);
3368 			snap->snap[i].data = ERR_PTR(err);
3373 		snap->snap[i].bo = NULL;
3377 void xe_vm_snapshot_print(struct xe_vm_snapshot *snap, struct drm_printer *p)
3381 	if (IS_ERR_OR_NULL(snap)) {
3382 		drm_printf(p, "[0].error: %li\n", PTR_ERR(snap));
3386 	for (i = 0; i < snap->num_snaps; i++) {
3387 		drm_printf(p, "[%llx].length: 0x%lx\n", snap->snap[i].ofs, snap->snap[i].len);
3389 		if (IS_ERR(snap->snap[i].data)) {
3390 			drm_printf(p, "[%llx].error: %li\n", snap->snap[i].ofs,
3391 				   PTR_ERR(snap->snap[i].data));
3395 		drm_printf(p, "[%llx].data: ", snap->snap[i].ofs);
3397 		for (j = 0; j < snap->snap[i].len; j += sizeof(u32)) {
3398 			u32 *val = snap->snap[i].data + j;
3408 void xe_vm_snapshot_free(struct xe_vm_snapshot *snap)
3412 	if (IS_ERR_OR_NULL(snap))
3415 	for (i = 0; i < snap->num_snaps; i++) {
3416 		if (!IS_ERR(snap->snap[i].data))
3417 			kvfree(snap->snap[i].data);
3418 		xe_bo_put(snap->snap[i].bo);
3419 		if (snap->snap[i].mm)
3420 			mmput(snap->snap[i].mm);
3422 	kvfree(snap);