projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 09d09e04 DW |
1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* Copyright(c) 2023 Intel Corporation. All rights reserved. */ | |
| 3 | #include <linux/module.h> | |
| 4 | #include <linux/dax.h> | |
| 5 | ||
| 6 | #include "../cxl/cxl.h" | |
| 7 | #include "bus.h" | |
| 8 | ||
| 9 | static int cxl_dax_region_probe(struct device *dev) | |
| 10 | { | |
| 11 | struct cxl_dax_region *cxlr_dax = to_cxl_dax_region(dev); | |
| 12 | int nid = phys_to_target_node(cxlr_dax->hpa_range.start); | |
| 13 | struct cxl_region *cxlr = cxlr_dax->cxlr; | |
| 14 | struct dax_region *dax_region; | |
| 15 | struct dev_dax_data data; | |
| 16 | struct dev_dax *dev_dax; | |
| 17 | ||
| 18 | if (nid == NUMA_NO_NODE) | |
| 19 | nid = memory_add_physaddr_to_nid(cxlr_dax->hpa_range.start); | |
| 20 | ||
| 21 | dax_region = alloc_dax_region(dev, cxlr->id, &cxlr_dax->hpa_range, nid, | |
| 22 | PMD_SIZE, IORESOURCE_DAX_KMEM); | |
| 23 | if (!dax_region) | |
| 24 | return -ENOMEM; | |
| 25 | ||
| 26 | data = (struct dev_dax_data) { | |
| 27 | .dax_region = dax_region, | |
| 28 | .id = -1, | |
| 29 | .size = range_len(&cxlr_dax->hpa_range), | |
| 30 | }; | |
| 31 | dev_dax = devm_create_dev_dax(&data); | |
| 32 | if (IS_ERR(dev_dax)) | |
| 33 | return PTR_ERR(dev_dax); | |
| 34 | ||
| 35 | /* child dev_dax instances now own the lifetime of the dax_region */ | |
| 36 | dax_region_put(dax_region); | |
| 37 | return 0; | |
| 38 | } | |
| 39 | ||
| 40 | static struct cxl_driver cxl_dax_region_driver = { | |
| 41 | .name = "cxl_dax_region", | |
| 42 | .probe = cxl_dax_region_probe, | |
| 43 | .id = CXL_DEVICE_DAX_REGION, | |
| 44 | .drv = { | |
| 45 | .suppress_bind_attrs = true, | |
| 46 | }, | |
| 47 | }; | |
| 48 | ||
| 49 | module_cxl_driver(cxl_dax_region_driver); | |
| 50 | MODULE_ALIAS_CXL(CXL_DEVICE_DAX_REGION); | |
| 51 | MODULE_LICENSE("GPL"); | |
| 52 | MODULE_AUTHOR("Intel Corporation"); | |
| 53 | MODULE_IMPORT_NS(CXL); |