projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| ec776ef6 CH |
1 | /* |
| 2 | * Copyright (c) 2015, Christoph Hellwig. | |
| 9f53f9fa | 3 | * Copyright (c) 2015, Intel Corporation. |
| ec776ef6 | 4 | */ |
| ec776ef6 | 5 | #include <linux/platform_device.h> |
| 9f53f9fa DW |
6 | #include <linux/libnvdimm.h> |
| 7 | #include <linux/module.h> | |
| ec776ef6 | 8 | #include <asm/e820.h> |
| ec776ef6 | 9 | |
| 9f53f9fa | 10 | static void e820_pmem_release(struct device *dev) |
| ec776ef6 | 11 | { |
| 9f53f9fa | 12 | struct nvdimm_bus *nvdimm_bus = dev->platform_data; |
| ec776ef6 | 13 | |
| 9f53f9fa DW |
14 | if (nvdimm_bus) |
| 15 | nvdimm_bus_unregister(nvdimm_bus); | |
| 16 | } | |
| ec776ef6 | 17 | |
| 9f53f9fa DW |
18 | static struct platform_device e820_pmem = { |
| 19 | .name = "e820_pmem", | |
| 20 | .id = -1, | |
| 21 | .dev = { | |
| 22 | .release = e820_pmem_release, | |
| 23 | }, | |
| 24 | }; | |
| ec776ef6 | 25 | |
| 9f53f9fa DW |
26 | static const struct attribute_group *e820_pmem_attribute_groups[] = { |
| 27 | &nvdimm_bus_attribute_group, | |
| 28 | NULL, | |
| 29 | }; | |
| ec776ef6 | 30 | |
| 9f53f9fa DW |
31 | static const struct attribute_group *e820_pmem_region_attribute_groups[] = { |
| 32 | &nd_region_attribute_group, | |
| 33 | &nd_device_attribute_group, | |
| 34 | NULL, | |
| 35 | }; | |
| ec776ef6 | 36 | |
| 9f53f9fa | 37 | static __init int register_e820_pmem(void) |
| ec776ef6 | 38 | { |
| 9f53f9fa DW |
39 | static struct nvdimm_bus_descriptor nd_desc; |
| 40 | struct device *dev = &e820_pmem.dev; | |
| 41 | struct nvdimm_bus *nvdimm_bus; | |
| 42 | int rc, i; | |
| 43 | ||
| 44 | rc = platform_device_register(&e820_pmem); | |
| 45 | if (rc) | |
| 46 | return rc; | |
| 47 | ||
| 48 | nd_desc.attr_groups = e820_pmem_attribute_groups; | |
| 49 | nd_desc.provider_name = "e820"; | |
| 50 | nvdimm_bus = nvdimm_bus_register(dev, &nd_desc); | |
| 51 | if (!nvdimm_bus) | |
| 52 | goto err; | |
| 53 | dev->platform_data = nvdimm_bus; | |
| ec776ef6 CH |
54 | |
| 55 | for (i = 0; i < e820.nr_map; i++) { | |
| 56 | struct e820entry *ei = &e820.map[i]; | |
| 9f53f9fa DW |
57 | struct resource res = { |
| 58 | .flags = IORESOURCE_MEM, | |
| 59 | .start = ei->addr, | |
| 60 | .end = ei->addr + ei->size - 1, | |
| 61 | }; | |
| 62 | struct nd_region_desc ndr_desc; | |
| 63 | ||
| 64 | if (ei->type != E820_PRAM) | |
| 65 | continue; | |
| ec776ef6 | 66 | |
| 9f53f9fa DW |
67 | memset(&ndr_desc, 0, sizeof(ndr_desc)); |
| 68 | ndr_desc.res = &res; | |
| 69 | ndr_desc.attr_groups = e820_pmem_region_attribute_groups; | |
| 41d7a6d6 | 70 | ndr_desc.numa_node = NUMA_NO_NODE; |
| 9f53f9fa DW |
71 | if (!nvdimm_pmem_region_create(nvdimm_bus, &ndr_desc)) |
| 72 | goto err; | |
| ec776ef6 CH |
73 | } |
| 74 | ||
| 75 | return 0; | |
| 9f53f9fa DW |
76 | |
| 77 | err: | |
| 78 | dev_err(dev, "failed to register legacy persistent memory ranges\n"); | |
| 79 | platform_device_unregister(&e820_pmem); | |
| 80 | return -ENXIO; | |
| ec776ef6 | 81 | } |
| 9f53f9fa | 82 | device_initcall(register_e820_pmem); |