Dan Williams | 4d88a97 | 2015-05-31 14:41:48 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright(c) 2013-2015 Intel Corporation. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of version 2 of the GNU General Public License as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | */ |
| 13 | #include <linux/vmalloc.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/device.h> |
| 16 | #include <linux/sizes.h> |
| 17 | #include <linux/ndctl.h> |
| 18 | #include <linux/slab.h> |
| 19 | #include <linux/mm.h> |
| 20 | #include <linux/nd.h> |
Dan Williams | 4a826c8 | 2015-06-09 16:09:36 -0400 | [diff] [blame] | 21 | #include "label.h" |
Dan Williams | 4d88a97 | 2015-05-31 14:41:48 -0400 | [diff] [blame] | 22 | #include "nd.h" |
| 23 | |
Dan Williams | 4d88a97 | 2015-05-31 14:41:48 -0400 | [diff] [blame] | 24 | static int nvdimm_probe(struct device *dev) |
| 25 | { |
| 26 | struct nvdimm_drvdata *ndd; |
| 27 | int rc; |
| 28 | |
Toshi Kani | aee6598 | 2016-08-16 13:08:40 -0600 | [diff] [blame] | 29 | rc = nvdimm_check_config_data(dev); |
| 30 | if (rc) { |
| 31 | /* not required for non-aliased nvdimm, ex. NVDIMM-N */ |
| 32 | if (rc == -ENOTTY) |
| 33 | rc = 0; |
| 34 | return rc; |
| 35 | } |
| 36 | |
Dan Williams | 4d88a97 | 2015-05-31 14:41:48 -0400 | [diff] [blame] | 37 | ndd = kzalloc(sizeof(*ndd), GFP_KERNEL); |
| 38 | if (!ndd) |
| 39 | return -ENOMEM; |
| 40 | |
| 41 | dev_set_drvdata(dev, ndd); |
Dan Williams | 4a826c8 | 2015-06-09 16:09:36 -0400 | [diff] [blame] | 42 | ndd->dpa.name = dev_name(dev); |
| 43 | ndd->ns_current = -1; |
| 44 | ndd->ns_next = -1; |
| 45 | ndd->dpa.start = 0; |
| 46 | ndd->dpa.end = -1; |
Dan Williams | 4d88a97 | 2015-05-31 14:41:48 -0400 | [diff] [blame] | 47 | ndd->dev = dev; |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 48 | get_device(dev); |
| 49 | kref_init(&ndd->kref); |
Dan Williams | 4d88a97 | 2015-05-31 14:41:48 -0400 | [diff] [blame] | 50 | |
| 51 | rc = nvdimm_init_nsarea(ndd); |
Dan Williams | 9d62ed9 | 2017-05-04 11:47:22 -0700 | [diff] [blame] | 52 | if (rc == -EACCES) |
| 53 | nvdimm_set_locked(dev); |
Dan Williams | 4d88a97 | 2015-05-31 14:41:48 -0400 | [diff] [blame] | 54 | if (rc) |
| 55 | goto err; |
| 56 | |
| 57 | rc = nvdimm_init_config_data(ndd); |
Dan Williams | 4b27db7 | 2017-09-24 09:57:34 -0700 | [diff] [blame] | 58 | if (rc == -EACCES) |
| 59 | nvdimm_set_locked(dev); |
Dan Williams | 4d88a97 | 2015-05-31 14:41:48 -0400 | [diff] [blame] | 60 | if (rc) |
| 61 | goto err; |
| 62 | |
| 63 | dev_dbg(dev, "config data size: %d\n", ndd->nsarea.config_size); |
| 64 | |
Dan Williams | 4a826c8 | 2015-06-09 16:09:36 -0400 | [diff] [blame] | 65 | nvdimm_bus_lock(dev); |
| 66 | ndd->ns_current = nd_label_validate(ndd); |
| 67 | ndd->ns_next = nd_label_next_nsindex(ndd->ns_current); |
| 68 | nd_label_copy(ndd, to_next_namespace_index(ndd), |
| 69 | to_current_namespace_index(ndd)); |
Dan Williams | c31898c | 2018-04-06 11:25:38 -0700 | [diff] [blame] | 70 | if (ndd->ns_current >= 0) { |
| 71 | rc = nd_label_reserve_dpa(ndd); |
| 72 | if (rc == 0) |
| 73 | nvdimm_set_aliasing(dev); |
| 74 | } |
Dan Williams | d34cb80 | 2017-09-25 11:01:31 -0700 | [diff] [blame] | 75 | nvdimm_clear_locked(dev); |
Dan Williams | 4a826c8 | 2015-06-09 16:09:36 -0400 | [diff] [blame] | 76 | nvdimm_bus_unlock(dev); |
| 77 | |
| 78 | if (rc) |
| 79 | goto err; |
| 80 | |
Dan Williams | 4d88a97 | 2015-05-31 14:41:48 -0400 | [diff] [blame] | 81 | return 0; |
| 82 | |
| 83 | err: |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 84 | put_ndd(ndd); |
Dan Williams | 4d88a97 | 2015-05-31 14:41:48 -0400 | [diff] [blame] | 85 | return rc; |
| 86 | } |
| 87 | |
| 88 | static int nvdimm_remove(struct device *dev) |
| 89 | { |
| 90 | struct nvdimm_drvdata *ndd = dev_get_drvdata(dev); |
| 91 | |
Toshi Kani | aee6598 | 2016-08-16 13:08:40 -0600 | [diff] [blame] | 92 | if (!ndd) |
| 93 | return 0; |
| 94 | |
Dan Williams | 4a826c8 | 2015-06-09 16:09:36 -0400 | [diff] [blame] | 95 | nvdimm_bus_lock(dev); |
| 96 | dev_set_drvdata(dev, NULL); |
Dan Williams | 4a826c8 | 2015-06-09 16:09:36 -0400 | [diff] [blame] | 97 | nvdimm_bus_unlock(dev); |
Dan Williams | bf9bccc | 2015-06-17 17:14:46 -0400 | [diff] [blame] | 98 | put_ndd(ndd); |
Dan Williams | 4d88a97 | 2015-05-31 14:41:48 -0400 | [diff] [blame] | 99 | |
| 100 | return 0; |
| 101 | } |
| 102 | |
| 103 | static struct nd_device_driver nvdimm_driver = { |
| 104 | .probe = nvdimm_probe, |
| 105 | .remove = nvdimm_remove, |
| 106 | .drv = { |
| 107 | .name = "nvdimm", |
| 108 | }, |
| 109 | .type = ND_DRIVER_DIMM, |
| 110 | }; |
| 111 | |
| 112 | int __init nvdimm_init(void) |
| 113 | { |
| 114 | return nd_driver_register(&nvdimm_driver); |
| 115 | } |
| 116 | |
Dan Williams | 3d88002 | 2015-05-31 15:02:11 -0400 | [diff] [blame] | 117 | void nvdimm_exit(void) |
Dan Williams | 4d88a97 | 2015-05-31 14:41:48 -0400 | [diff] [blame] | 118 | { |
| 119 | driver_unregister(&nvdimm_driver.drv); |
| 120 | } |
| 121 | |
| 122 | MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DIMM); |