// SPDX-License-Identifier: GPL-2.0-only /* Copyright(c) 2023 Intel Corporation. All rights reserved. */ #include <linux/module.h> #include <linux/dax.h> #include "../cxl/cxl.h" #include "bus.h" static int cxl_dax_region_probe(struct device *dev) { struct cxl_dax_region *cxlr_dax = to_cxl_dax_region(dev); int nid = phys_to_target_node(cxlr_dax->hpa_range.start); struct cxl_region *cxlr = cxlr_dax->cxlr; struct dax_region *dax_region; struct dev_dax_data data; if (nid == NUMA_NO_NODE) nid = memory_add_physaddr_to_nid(cxlr_dax->hpa_range.start); dax_region = alloc_dax_region(dev, cxlr->id, &cxlr_dax->hpa_range, nid, PMD_SIZE, IORESOURCE_DAX_KMEM); if (!dax_region) return -ENOMEM; data = (struct dev_dax_data) { .dax_region = dax_region, .id = -1, .size = range_len(&cxlr_dax->hpa_range), .memmap_on_memory = true, }; return PTR_ERR_OR_ZERO(devm_create_dev_dax(&data)); } static struct cxl_driver cxl_dax_region_driver = { .name = "cxl_dax_region", .probe = cxl_dax_region_probe, .id = CXL_DEVICE_DAX_REGION, .drv = { .suppress_bind_attrs = true, }, }; module_cxl_driver(cxl_dax_region_driver); MODULE_ALIAS_CXL(CXL_DEVICE_DAX_REGION); MODULE_DESCRIPTION("CXL DAX: direct access to CXL regions"); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Intel Corporation"); MODULE_IMPORT_NS(CXL);