From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/nvdimm/e820.c | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 drivers/nvdimm/e820.c (limited to 'drivers/nvdimm/e820.c') diff --git a/drivers/nvdimm/e820.c b/drivers/nvdimm/e820.c new file mode 100644 index 0000000000..4cd18be9d0 --- /dev/null +++ b/drivers/nvdimm/e820.c @@ -0,0 +1,73 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2015, Christoph Hellwig. + * Copyright (c) 2015, Intel Corporation. + */ +#include +#include +#include +#include +#include + +static int e820_pmem_remove(struct platform_device *pdev) +{ + struct nvdimm_bus *nvdimm_bus = platform_get_drvdata(pdev); + + nvdimm_bus_unregister(nvdimm_bus); + return 0; +} + +static int e820_register_one(struct resource *res, void *data) +{ + struct nd_region_desc ndr_desc; + struct nvdimm_bus *nvdimm_bus = data; + int nid = phys_to_target_node(res->start); + + memset(&ndr_desc, 0, sizeof(ndr_desc)); + ndr_desc.res = res; + ndr_desc.numa_node = numa_map_to_online_node(nid); + ndr_desc.target_node = nid; + set_bit(ND_REGION_PAGEMAP, &ndr_desc.flags); + if (!nvdimm_pmem_region_create(nvdimm_bus, &ndr_desc)) + return -ENXIO; + return 0; +} + +static int e820_pmem_probe(struct platform_device *pdev) +{ + static struct nvdimm_bus_descriptor nd_desc; + struct device *dev = &pdev->dev; + struct nvdimm_bus *nvdimm_bus; + int rc = -ENXIO; + + nd_desc.provider_name = "e820"; + nd_desc.module = THIS_MODULE; + nvdimm_bus = nvdimm_bus_register(dev, &nd_desc); + if (!nvdimm_bus) + goto err; + platform_set_drvdata(pdev, nvdimm_bus); + + rc = walk_iomem_res_desc(IORES_DESC_PERSISTENT_MEMORY_LEGACY, + IORESOURCE_MEM, 0, -1, nvdimm_bus, e820_register_one); + if (rc) + goto err; + return 0; +err: + nvdimm_bus_unregister(nvdimm_bus); + dev_err(dev, "failed to register legacy persistent memory ranges\n"); + return rc; +} + +static struct platform_driver e820_pmem_driver = { + .probe = e820_pmem_probe, + .remove = e820_pmem_remove, + .driver = { + .name = "e820_pmem", + }, +}; + +module_platform_driver(e820_pmem_driver); + +MODULE_ALIAS("platform:e820_pmem*"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Intel Corporation"); -- cgit v1.2.3