| Dan Williams | 3d88002 | 2015-05-31 15:02:11 -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/module.h> |
| 14 | #include <linux/device.h> |
| 15 | #include <linux/slab.h> |
| 16 | #include <linux/nd.h> |
| 17 | #include "nd.h" |
| 18 | |
| 19 | static void namespace_io_release(struct device *dev) |
| 20 | { |
| 21 | struct nd_namespace_io *nsio = to_nd_namespace_io(dev); |
| 22 | |
| 23 | kfree(nsio); |
| 24 | } |
| 25 | |
| 26 | static struct device_type namespace_io_device_type = { |
| 27 | .name = "nd_namespace_io", |
| 28 | .release = namespace_io_release, |
| 29 | }; |
| 30 | |
| 31 | static ssize_t nstype_show(struct device *dev, |
| 32 | struct device_attribute *attr, char *buf) |
| 33 | { |
| 34 | struct nd_region *nd_region = to_nd_region(dev->parent); |
| 35 | |
| 36 | return sprintf(buf, "%d\n", nd_region_to_nstype(nd_region)); |
| 37 | } |
| 38 | static DEVICE_ATTR_RO(nstype); |
| 39 | |
| 40 | static struct attribute *nd_namespace_attributes[] = { |
| 41 | &dev_attr_nstype.attr, |
| 42 | NULL, |
| 43 | }; |
| 44 | |
| 45 | static struct attribute_group nd_namespace_attribute_group = { |
| 46 | .attrs = nd_namespace_attributes, |
| 47 | }; |
| 48 | |
| 49 | static const struct attribute_group *nd_namespace_attribute_groups[] = { |
| 50 | &nd_device_attribute_group, |
| 51 | &nd_namespace_attribute_group, |
| 52 | NULL, |
| 53 | }; |
| 54 | |
| 55 | static struct device **create_namespace_io(struct nd_region *nd_region) |
| 56 | { |
| 57 | struct nd_namespace_io *nsio; |
| 58 | struct device *dev, **devs; |
| 59 | struct resource *res; |
| 60 | |
| 61 | nsio = kzalloc(sizeof(*nsio), GFP_KERNEL); |
| 62 | if (!nsio) |
| 63 | return NULL; |
| 64 | |
| 65 | devs = kcalloc(2, sizeof(struct device *), GFP_KERNEL); |
| 66 | if (!devs) { |
| 67 | kfree(nsio); |
| 68 | return NULL; |
| 69 | } |
| 70 | |
| 71 | dev = &nsio->dev; |
| 72 | dev->type = &namespace_io_device_type; |
| 73 | dev->parent = &nd_region->dev; |
| 74 | res = &nsio->res; |
| 75 | res->name = dev_name(&nd_region->dev); |
| 76 | res->flags = IORESOURCE_MEM; |
| 77 | res->start = nd_region->ndr_start; |
| 78 | res->end = res->start + nd_region->ndr_size - 1; |
| 79 | |
| 80 | devs[0] = dev; |
| 81 | return devs; |
| 82 | } |
| 83 | |
| 84 | int nd_region_register_namespaces(struct nd_region *nd_region, int *err) |
| 85 | { |
| 86 | struct device **devs = NULL; |
| 87 | int i; |
| 88 | |
| 89 | *err = 0; |
| 90 | switch (nd_region_to_nstype(nd_region)) { |
| 91 | case ND_DEVICE_NAMESPACE_IO: |
| 92 | devs = create_namespace_io(nd_region); |
| 93 | break; |
| 94 | default: |
| 95 | break; |
| 96 | } |
| 97 | |
| 98 | if (!devs) |
| 99 | return -ENODEV; |
| 100 | |
| 101 | for (i = 0; devs[i]; i++) { |
| 102 | struct device *dev = devs[i]; |
| 103 | |
| 104 | dev_set_name(dev, "namespace%d.%d", nd_region->id, i); |
| 105 | dev->groups = nd_namespace_attribute_groups; |
| 106 | nd_device_register(dev); |
| 107 | } |
| 108 | kfree(devs); |
| 109 | |
| 110 | return i; |
| 111 | } |