projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 4d88a97a DW |
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> | |
| 4a826c83 | 21 | #include "label.h" |
| 4d88a97a DW |
22 | #include "nd.h" |
| 23 | ||
| 4d88a97a DW |
24 | static int nvdimm_probe(struct device *dev) |
| 25 | { | |
| 26 | struct nvdimm_drvdata *ndd; | |
| 27 | int rc; | |
| 28 | ||
| aee65987 TK |
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 | ||
| 4d88a97a DW |
37 | ndd = kzalloc(sizeof(*ndd), GFP_KERNEL); |
| 38 | if (!ndd) | |
| 39 | return -ENOMEM; | |
| 40 | ||
| 41 | dev_set_drvdata(dev, ndd); | |
| 4a826c83 DW |
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; | |
| 4d88a97a | 47 | ndd->dev = dev; |
| bf9bccc1 DW |
48 | get_device(dev); |
| 49 | kref_init(&ndd->kref); | |
| 4d88a97a DW |
50 | |
| 51 | rc = nvdimm_init_nsarea(ndd); | |
| 52 | if (rc) | |
| 53 | goto err; | |
| 54 | ||
| 55 | rc = nvdimm_init_config_data(ndd); | |
| 56 | if (rc) | |
| 57 | goto err; | |
| 58 | ||
| 59 | dev_dbg(dev, "config data size: %d\n", ndd->nsarea.config_size); | |
| 60 | ||
| 4a826c83 DW |
61 | nvdimm_bus_lock(dev); |
| 62 | ndd->ns_current = nd_label_validate(ndd); | |
| 63 | ndd->ns_next = nd_label_next_nsindex(ndd->ns_current); | |
| 64 | nd_label_copy(ndd, to_next_namespace_index(ndd), | |
| 65 | to_current_namespace_index(ndd)); | |
| 66 | rc = nd_label_reserve_dpa(ndd); | |
| 67 | nvdimm_bus_unlock(dev); | |
| 68 | ||
| 69 | if (rc) | |
| 70 | goto err; | |
| 71 | ||
| 4d88a97a DW |
72 | return 0; |
| 73 | ||
| 74 | err: | |
| bf9bccc1 | 75 | put_ndd(ndd); |
| 4d88a97a DW |
76 | return rc; |
| 77 | } | |
| 78 | ||
| 79 | static int nvdimm_remove(struct device *dev) | |
| 80 | { | |
| 81 | struct nvdimm_drvdata *ndd = dev_get_drvdata(dev); | |
| 82 | ||
| aee65987 TK |
83 | if (!ndd) |
| 84 | return 0; | |
| 85 | ||
| 4a826c83 DW |
86 | nvdimm_bus_lock(dev); |
| 87 | dev_set_drvdata(dev, NULL); | |
| 4a826c83 | 88 | nvdimm_bus_unlock(dev); |
| bf9bccc1 | 89 | put_ndd(ndd); |
| 4d88a97a DW |
90 | |
| 91 | return 0; | |
| 92 | } | |
| 93 | ||
| 94 | static struct nd_device_driver nvdimm_driver = { | |
| 95 | .probe = nvdimm_probe, | |
| 96 | .remove = nvdimm_remove, | |
| 97 | .drv = { | |
| 98 | .name = "nvdimm", | |
| 99 | }, | |
| 100 | .type = ND_DRIVER_DIMM, | |
| 101 | }; | |
| 102 | ||
| 103 | int __init nvdimm_init(void) | |
| 104 | { | |
| 105 | return nd_driver_register(&nvdimm_driver); | |
| 106 | } | |
| 107 | ||
| 3d88002e | 108 | void nvdimm_exit(void) |
| 4d88a97a DW |
109 | { |
| 110 | driver_unregister(&nvdimm_driver.drv); | |
| 111 | } | |
| 112 | ||
| 113 | MODULE_ALIAS_ND_DEVICE(ND_DEVICE_DIMM); |