109d09e04SDan Williams // SPDX-License-Identifier: GPL-2.0-only 209d09e04SDan Williams /* Copyright(c) 2023 Intel Corporation. All rights reserved. */ 309d09e04SDan Williams #include <linux/module.h> 409d09e04SDan Williams #include <linux/dax.h> 509d09e04SDan Williams 609d09e04SDan Williams #include "../cxl/cxl.h" 709d09e04SDan Williams #include "bus.h" 809d09e04SDan Williams 909d09e04SDan Williams static int cxl_dax_region_probe(struct device *dev) 1009d09e04SDan Williams { 1109d09e04SDan Williams struct cxl_dax_region *cxlr_dax = to_cxl_dax_region(dev); 1209d09e04SDan Williams int nid = phys_to_target_node(cxlr_dax->hpa_range.start); 1309d09e04SDan Williams struct cxl_region *cxlr = cxlr_dax->cxlr; 1409d09e04SDan Williams struct dax_region *dax_region; 1509d09e04SDan Williams struct dev_dax_data data; 1609d09e04SDan Williams 1709d09e04SDan Williams if (nid == NUMA_NO_NODE) 1809d09e04SDan Williams nid = memory_add_physaddr_to_nid(cxlr_dax->hpa_range.start); 1909d09e04SDan Williams 2009d09e04SDan Williams dax_region = alloc_dax_region(dev, cxlr->id, &cxlr_dax->hpa_range, nid, 2109d09e04SDan Williams PMD_SIZE, IORESOURCE_DAX_KMEM); 2209d09e04SDan Williams if (!dax_region) 2309d09e04SDan Williams return -ENOMEM; 2409d09e04SDan Williams 2509d09e04SDan Williams data = (struct dev_dax_data) { 2609d09e04SDan Williams .dax_region = dax_region, 2709d09e04SDan Williams .id = -1, 2809d09e04SDan Williams .size = range_len(&cxlr_dax->hpa_range), 2909d09e04SDan Williams }; 3009d09e04SDan Williams 31*2532f416SDan Williams return PTR_ERR_OR_ZERO(devm_create_dev_dax(&data)); 3209d09e04SDan Williams } 3309d09e04SDan Williams 3409d09e04SDan Williams static struct cxl_driver cxl_dax_region_driver = { 3509d09e04SDan Williams .name = "cxl_dax_region", 3609d09e04SDan Williams .probe = cxl_dax_region_probe, 3709d09e04SDan Williams .id = CXL_DEVICE_DAX_REGION, 3809d09e04SDan Williams .drv = { 3909d09e04SDan Williams .suppress_bind_attrs = true, 4009d09e04SDan Williams }, 4109d09e04SDan Williams }; 4209d09e04SDan Williams 4309d09e04SDan Williams module_cxl_driver(cxl_dax_region_driver); 4409d09e04SDan Williams MODULE_ALIAS_CXL(CXL_DEVICE_DAX_REGION); 4509d09e04SDan Williams MODULE_LICENSE("GPL"); 4609d09e04SDan Williams MODULE_AUTHOR("Intel Corporation"); 4709d09e04SDan Williams MODULE_IMPORT_NS(CXL); 48