ASoC: Use card field to indicate whether a component is bound
[linux-2.6-block.git] / tools / testing / nvdimm / test / iomap.c
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/rculist.h>
14 #include <linux/export.h>
15 #include <linux/ioport.h>
16 #include <linux/module.h>
17 #include <linux/types.h>
18 #include <linux/io.h>
19 #include "nfit_test.h"
20
21 static LIST_HEAD(iomap_head);
22
23 static struct iomap_ops {
24         nfit_test_lookup_fn nfit_test_lookup;
25         struct list_head list;
26 } iomap_ops = {
27         .list = LIST_HEAD_INIT(iomap_ops.list),
28 };
29
30 void nfit_test_setup(nfit_test_lookup_fn lookup)
31 {
32         iomap_ops.nfit_test_lookup = lookup;
33         list_add_rcu(&iomap_ops.list, &iomap_head);
34 }
35 EXPORT_SYMBOL(nfit_test_setup);
36
37 void nfit_test_teardown(void)
38 {
39         list_del_rcu(&iomap_ops.list);
40         synchronize_rcu();
41 }
42 EXPORT_SYMBOL(nfit_test_teardown);
43
44 static struct nfit_test_resource *get_nfit_res(resource_size_t resource)
45 {
46         struct iomap_ops *ops;
47
48         ops = list_first_or_null_rcu(&iomap_head, typeof(*ops), list);
49         if (ops)
50                 return ops->nfit_test_lookup(resource);
51         return NULL;
52 }
53
54 void __iomem *__nfit_test_ioremap(resource_size_t offset, unsigned long size,
55                 void __iomem *(*fallback_fn)(resource_size_t, unsigned long))
56 {
57         struct nfit_test_resource *nfit_res;
58
59         rcu_read_lock();
60         nfit_res = get_nfit_res(offset);
61         rcu_read_unlock();
62         if (nfit_res)
63                 return (void __iomem *) nfit_res->buf + offset
64                         - nfit_res->res->start;
65         return fallback_fn(offset, size);
66 }
67
68 void __iomem *__wrap_ioremap_cache(resource_size_t offset, unsigned long size)
69 {
70         return __nfit_test_ioremap(offset, size, ioremap_cache);
71 }
72 EXPORT_SYMBOL(__wrap_ioremap_cache);
73
74 void __iomem *__wrap_ioremap_nocache(resource_size_t offset, unsigned long size)
75 {
76         return __nfit_test_ioremap(offset, size, ioremap_nocache);
77 }
78 EXPORT_SYMBOL(__wrap_ioremap_nocache);
79
80 void __wrap_iounmap(volatile void __iomem *addr)
81 {
82         struct nfit_test_resource *nfit_res;
83
84         rcu_read_lock();
85         nfit_res = get_nfit_res((unsigned long) addr);
86         rcu_read_unlock();
87         if (nfit_res)
88                 return;
89         return iounmap(addr);
90 }
91 EXPORT_SYMBOL(__wrap_iounmap);
92
93 struct resource *__wrap___request_region(struct resource *parent,
94                 resource_size_t start, resource_size_t n, const char *name,
95                 int flags)
96 {
97         struct nfit_test_resource *nfit_res;
98
99         if (parent == &iomem_resource) {
100                 rcu_read_lock();
101                 nfit_res = get_nfit_res(start);
102                 rcu_read_unlock();
103                 if (nfit_res) {
104                         struct resource *res = nfit_res->res + 1;
105
106                         if (start + n > nfit_res->res->start
107                                         + resource_size(nfit_res->res)) {
108                                 pr_debug("%s: start: %llx n: %llx overflow: %pr\n",
109                                                 __func__, start, n,
110                                                 nfit_res->res);
111                                 return NULL;
112                         }
113
114                         res->start = start;
115                         res->end = start + n - 1;
116                         res->name = name;
117                         res->flags = resource_type(parent);
118                         res->flags |= IORESOURCE_BUSY | flags;
119                         pr_debug("%s: %pr\n", __func__, res);
120                         return res;
121                 }
122         }
123         return __request_region(parent, start, n, name, flags);
124 }
125 EXPORT_SYMBOL(__wrap___request_region);
126
127 void __wrap___release_region(struct resource *parent, resource_size_t start,
128                                 resource_size_t n)
129 {
130         struct nfit_test_resource *nfit_res;
131
132         if (parent == &iomem_resource) {
133                 rcu_read_lock();
134                 nfit_res = get_nfit_res(start);
135                 rcu_read_unlock();
136                 if (nfit_res) {
137                         struct resource *res = nfit_res->res + 1;
138
139                         if (start != res->start || resource_size(res) != n)
140                                 pr_info("%s: start: %llx n: %llx mismatch: %pr\n",
141                                                 __func__, start, n, res);
142                         else
143                                 memset(res, 0, sizeof(*res));
144                         return;
145                 }
146         }
147         __release_region(parent, start, n);
148 }
149 EXPORT_SYMBOL(__wrap___release_region);
150
151 MODULE_LICENSE("GPL v2");