projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| ec776ef6 CH |
1 | /* |
| 2 | * Copyright (c) 2015, Christoph Hellwig. | |
| 3 | */ | |
| 4 | #include <linux/memblock.h> | |
| 5 | #include <linux/platform_device.h> | |
| 6 | #include <linux/slab.h> | |
| 7 | #include <asm/e820.h> | |
| 8 | #include <asm/page_types.h> | |
| 9 | #include <asm/setup.h> | |
| 10 | ||
| 11 | static __init void register_pmem_device(struct resource *res) | |
| 12 | { | |
| 13 | struct platform_device *pdev; | |
| 14 | int error; | |
| 15 | ||
| 16 | pdev = platform_device_alloc("pmem", PLATFORM_DEVID_AUTO); | |
| 17 | if (!pdev) | |
| 18 | return; | |
| 19 | ||
| 20 | error = platform_device_add_resources(pdev, res, 1); | |
| 21 | if (error) | |
| 22 | goto out_put_pdev; | |
| 23 | ||
| 24 | error = platform_device_add(pdev); | |
| 25 | if (error) | |
| 26 | goto out_put_pdev; | |
| 27 | return; | |
| 28 | ||
| 29 | out_put_pdev: | |
| 30 | dev_warn(&pdev->dev, "failed to add 'pmem' (persistent memory) device!\n"); | |
| 31 | platform_device_put(pdev); | |
| 32 | } | |
| 33 | ||
| 34 | static __init int register_pmem_devices(void) | |
| 35 | { | |
| 36 | int i; | |
| 37 | ||
| 38 | for (i = 0; i < e820.nr_map; i++) { | |
| 39 | struct e820entry *ei = &e820.map[i]; | |
| 40 | ||
| 41 | if (ei->type == E820_PRAM) { | |
| 42 | struct resource res = { | |
| 43 | .flags = IORESOURCE_MEM, | |
| 44 | .start = ei->addr, | |
| 45 | .end = ei->addr + ei->size - 1, | |
| 46 | }; | |
| 47 | register_pmem_device(&res); | |
| 48 | } | |
| 49 | } | |
| 50 | ||
| 51 | return 0; | |
| 52 | } | |
| 53 | device_initcall(register_pmem_devices); |