2 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
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.
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.
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>
20 #include "nfit_test.h"
22 static LIST_HEAD(iomap_head);
24 static struct iomap_ops {
25 nfit_test_lookup_fn nfit_test_lookup;
26 struct list_head list;
28 .list = LIST_HEAD_INIT(iomap_ops.list),
31 void nfit_test_setup(nfit_test_lookup_fn lookup)
33 iomap_ops.nfit_test_lookup = lookup;
34 list_add_rcu(&iomap_ops.list, &iomap_head);
36 EXPORT_SYMBOL(nfit_test_setup);
38 void nfit_test_teardown(void)
40 list_del_rcu(&iomap_ops.list);
43 EXPORT_SYMBOL(nfit_test_teardown);
45 static struct nfit_test_resource *__get_nfit_res(resource_size_t resource)
47 struct iomap_ops *ops;
49 ops = list_first_or_null_rcu(&iomap_head, typeof(*ops), list);
51 return ops->nfit_test_lookup(resource);
55 struct nfit_test_resource *get_nfit_res(resource_size_t resource)
57 struct nfit_test_resource *res;
60 res = __get_nfit_res(resource);
65 EXPORT_SYMBOL(get_nfit_res);
67 void __iomem *__nfit_test_ioremap(resource_size_t offset, unsigned long size,
68 void __iomem *(*fallback_fn)(resource_size_t, unsigned long))
70 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
73 return (void __iomem *) nfit_res->buf + offset
74 - nfit_res->res->start;
75 return fallback_fn(offset, size);
78 void __iomem *__wrap_devm_ioremap_nocache(struct device *dev,
79 resource_size_t offset, unsigned long size)
81 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
84 return (void __iomem *) nfit_res->buf + offset
85 - nfit_res->res->start;
86 return devm_ioremap_nocache(dev, offset, size);
88 EXPORT_SYMBOL(__wrap_devm_ioremap_nocache);
90 void *__wrap_devm_memremap(struct device *dev, resource_size_t offset,
91 size_t size, unsigned long flags)
93 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
96 return nfit_res->buf + offset - nfit_res->res->start;
97 return devm_memremap(dev, offset, size, flags);
99 EXPORT_SYMBOL(__wrap_devm_memremap);
101 #ifdef __HAVE_ARCH_PTE_DEVMAP
102 #include <linux/memremap.h>
103 #include <linux/pfn_t.h>
105 void *__wrap_devm_memremap_pages(struct device *dev, struct resource *res,
106 struct percpu_ref *ref, struct vmem_altmap *altmap)
108 resource_size_t offset = res->start;
109 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
112 return nfit_res->buf + offset - nfit_res->res->start;
113 return devm_memremap_pages(dev, res, ref, altmap);
115 EXPORT_SYMBOL(__wrap_devm_memremap_pages);
117 pfn_t __wrap_phys_to_pfn_t(phys_addr_t addr, unsigned long flags)
119 struct nfit_test_resource *nfit_res = get_nfit_res(addr);
123 return phys_to_pfn_t(addr, flags);
125 EXPORT_SYMBOL(__wrap_phys_to_pfn_t);
127 /* to be removed post 4.5-rc1 */
128 void *__wrap_devm_memremap_pages(struct device *dev, struct resource *res)
130 resource_size_t offset = res->start;
131 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
134 return nfit_res->buf + offset - nfit_res->res->start;
135 return devm_memremap_pages(dev, res);
137 EXPORT_SYMBOL(__wrap_devm_memremap_pages);
140 void *__wrap_memremap(resource_size_t offset, size_t size,
143 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
146 return nfit_res->buf + offset - nfit_res->res->start;
147 return memremap(offset, size, flags);
149 EXPORT_SYMBOL(__wrap_memremap);
151 void __wrap_devm_memunmap(struct device *dev, void *addr)
153 struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
157 return devm_memunmap(dev, addr);
159 EXPORT_SYMBOL(__wrap_devm_memunmap);
161 void __iomem *__wrap_ioremap_nocache(resource_size_t offset, unsigned long size)
163 return __nfit_test_ioremap(offset, size, ioremap_nocache);
165 EXPORT_SYMBOL(__wrap_ioremap_nocache);
167 void __iomem *__wrap_ioremap_wc(resource_size_t offset, unsigned long size)
169 return __nfit_test_ioremap(offset, size, ioremap_wc);
171 EXPORT_SYMBOL(__wrap_ioremap_wc);
173 void __wrap_iounmap(volatile void __iomem *addr)
175 struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
178 return iounmap(addr);
180 EXPORT_SYMBOL(__wrap_iounmap);
182 void __wrap_memunmap(void *addr)
184 struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
188 return memunmap(addr);
190 EXPORT_SYMBOL(__wrap_memunmap);
192 static struct resource *nfit_test_request_region(struct device *dev,
193 struct resource *parent, resource_size_t start,
194 resource_size_t n, const char *name, int flags)
196 struct nfit_test_resource *nfit_res;
198 if (parent == &iomem_resource) {
199 nfit_res = get_nfit_res(start);
201 struct resource *res = nfit_res->res + 1;
203 if (start + n > nfit_res->res->start
204 + resource_size(nfit_res->res)) {
205 pr_debug("%s: start: %llx n: %llx overflow: %pr\n",
212 res->end = start + n - 1;
214 res->flags = resource_type(parent);
215 res->flags |= IORESOURCE_BUSY | flags;
216 pr_debug("%s: %pr\n", __func__, res);
221 return __devm_request_region(dev, parent, start, n, name);
222 return __request_region(parent, start, n, name, flags);
225 struct resource *__wrap___request_region(struct resource *parent,
226 resource_size_t start, resource_size_t n, const char *name,
229 return nfit_test_request_region(NULL, parent, start, n, name, flags);
231 EXPORT_SYMBOL(__wrap___request_region);
233 int __wrap_insert_resource(struct resource *parent, struct resource *res)
235 if (get_nfit_res(res->start))
237 return insert_resource(parent, res);
239 EXPORT_SYMBOL(__wrap_insert_resource);
241 int __wrap_remove_resource(struct resource *res)
243 if (get_nfit_res(res->start))
245 return remove_resource(res);
247 EXPORT_SYMBOL(__wrap_remove_resource);
249 struct resource *__wrap___devm_request_region(struct device *dev,
250 struct resource *parent, resource_size_t start,
251 resource_size_t n, const char *name)
255 return nfit_test_request_region(dev, parent, start, n, name, 0);
257 EXPORT_SYMBOL(__wrap___devm_request_region);
259 static bool nfit_test_release_region(struct resource *parent,
260 resource_size_t start, resource_size_t n)
262 if (parent == &iomem_resource) {
263 struct nfit_test_resource *nfit_res = get_nfit_res(start);
265 struct resource *res = nfit_res->res + 1;
267 if (start != res->start || resource_size(res) != n)
268 pr_info("%s: start: %llx n: %llx mismatch: %pr\n",
269 __func__, start, n, res);
271 memset(res, 0, sizeof(*res));
278 void __wrap___release_region(struct resource *parent, resource_size_t start,
281 if (!nfit_test_release_region(parent, start, n))
282 __release_region(parent, start, n);
284 EXPORT_SYMBOL(__wrap___release_region);
286 void __wrap___devm_release_region(struct device *dev, struct resource *parent,
287 resource_size_t start, resource_size_t n)
289 if (!nfit_test_release_region(parent, start, n))
290 __devm_release_region(dev, parent, start, n);
292 EXPORT_SYMBOL(__wrap___devm_release_region);
294 MODULE_LICENSE("GPL v2");