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/memremap.h>
14 #include <linux/rculist.h>
15 #include <linux/export.h>
16 #include <linux/ioport.h>
17 #include <linux/module.h>
18 #include <linux/types.h>
19 #include <linux/pfn_t.h>
20 #include <linux/acpi.h>
23 #include "nfit_test.h"
25 static LIST_HEAD(iomap_head);
27 static struct iomap_ops {
28 nfit_test_lookup_fn nfit_test_lookup;
29 nfit_test_evaluate_dsm_fn evaluate_dsm;
30 struct list_head list;
32 .list = LIST_HEAD_INIT(iomap_ops.list),
35 void nfit_test_setup(nfit_test_lookup_fn lookup,
36 nfit_test_evaluate_dsm_fn evaluate)
38 iomap_ops.nfit_test_lookup = lookup;
39 iomap_ops.evaluate_dsm = evaluate;
40 list_add_rcu(&iomap_ops.list, &iomap_head);
42 EXPORT_SYMBOL(nfit_test_setup);
44 void nfit_test_teardown(void)
46 list_del_rcu(&iomap_ops.list);
49 EXPORT_SYMBOL(nfit_test_teardown);
51 static struct nfit_test_resource *__get_nfit_res(resource_size_t resource)
53 struct iomap_ops *ops;
55 ops = list_first_or_null_rcu(&iomap_head, typeof(*ops), list);
57 return ops->nfit_test_lookup(resource);
61 struct nfit_test_resource *get_nfit_res(resource_size_t resource)
63 struct nfit_test_resource *res;
66 res = __get_nfit_res(resource);
71 EXPORT_SYMBOL(get_nfit_res);
73 void __iomem *__nfit_test_ioremap(resource_size_t offset, unsigned long size,
74 void __iomem *(*fallback_fn)(resource_size_t, unsigned long))
76 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
79 return (void __iomem *) nfit_res->buf + offset
80 - nfit_res->res.start;
81 return fallback_fn(offset, size);
84 void __iomem *__wrap_devm_ioremap_nocache(struct device *dev,
85 resource_size_t offset, unsigned long size)
87 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
90 return (void __iomem *) nfit_res->buf + offset
91 - nfit_res->res.start;
92 return devm_ioremap_nocache(dev, offset, size);
94 EXPORT_SYMBOL(__wrap_devm_ioremap_nocache);
96 void *__wrap_devm_memremap(struct device *dev, resource_size_t offset,
97 size_t size, unsigned long flags)
99 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
102 return nfit_res->buf + offset - nfit_res->res.start;
103 return devm_memremap(dev, offset, size, flags);
105 EXPORT_SYMBOL(__wrap_devm_memremap);
107 static void nfit_test_kill(void *_pgmap)
109 struct dev_pagemap *pgmap = _pgmap;
111 pgmap->kill(pgmap->ref);
114 void *__wrap_devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap)
116 resource_size_t offset = pgmap->res.start;
117 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
122 rc = devm_add_action_or_reset(dev, nfit_test_kill, pgmap);
125 return nfit_res->buf + offset - nfit_res->res.start;
127 return devm_memremap_pages(dev, pgmap);
129 EXPORT_SYMBOL_GPL(__wrap_devm_memremap_pages);
131 pfn_t __wrap_phys_to_pfn_t(phys_addr_t addr, unsigned long flags)
133 struct nfit_test_resource *nfit_res = get_nfit_res(addr);
137 return phys_to_pfn_t(addr, flags);
139 EXPORT_SYMBOL(__wrap_phys_to_pfn_t);
141 void *__wrap_memremap(resource_size_t offset, size_t size,
144 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
147 return nfit_res->buf + offset - nfit_res->res.start;
148 return memremap(offset, size, flags);
150 EXPORT_SYMBOL(__wrap_memremap);
152 void __wrap_devm_memunmap(struct device *dev, void *addr)
154 struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
158 return devm_memunmap(dev, addr);
160 EXPORT_SYMBOL(__wrap_devm_memunmap);
162 void __iomem *__wrap_ioremap_nocache(resource_size_t offset, unsigned long size)
164 return __nfit_test_ioremap(offset, size, ioremap_nocache);
166 EXPORT_SYMBOL(__wrap_ioremap_nocache);
168 void __iomem *__wrap_ioremap_wc(resource_size_t offset, unsigned long size)
170 return __nfit_test_ioremap(offset, size, ioremap_wc);
172 EXPORT_SYMBOL(__wrap_ioremap_wc);
174 void __wrap_iounmap(volatile void __iomem *addr)
176 struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
179 return iounmap(addr);
181 EXPORT_SYMBOL(__wrap_iounmap);
183 void __wrap_memunmap(void *addr)
185 struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
189 return memunmap(addr);
191 EXPORT_SYMBOL(__wrap_memunmap);
193 static bool nfit_test_release_region(struct device *dev,
194 struct resource *parent, resource_size_t start,
197 static void nfit_devres_release(struct device *dev, void *data)
199 struct resource *res = *((struct resource **) data);
201 WARN_ON(!nfit_test_release_region(NULL, &iomem_resource, res->start,
202 resource_size(res)));
205 static int match(struct device *dev, void *__res, void *match_data)
207 struct resource *res = *((struct resource **) __res);
208 resource_size_t start = *((resource_size_t *) match_data);
210 return res->start == start;
213 static bool nfit_test_release_region(struct device *dev,
214 struct resource *parent, resource_size_t start,
217 if (parent == &iomem_resource) {
218 struct nfit_test_resource *nfit_res = get_nfit_res(start);
221 struct nfit_test_request *req;
222 struct resource *res = NULL;
225 devres_release(dev, nfit_devres_release, match,
230 spin_lock(&nfit_res->lock);
231 list_for_each_entry(req, &nfit_res->requests, list)
232 if (req->res.start == start) {
234 list_del(&req->list);
237 spin_unlock(&nfit_res->lock);
239 WARN(!res || resource_size(res) != n,
240 "%s: start: %llx n: %llx mismatch: %pr\n",
241 __func__, start, n, res);
250 static struct resource *nfit_test_request_region(struct device *dev,
251 struct resource *parent, resource_size_t start,
252 resource_size_t n, const char *name, int flags)
254 struct nfit_test_resource *nfit_res;
256 if (parent == &iomem_resource) {
257 nfit_res = get_nfit_res(start);
259 struct nfit_test_request *req;
260 struct resource *res = NULL;
262 if (start + n > nfit_res->res.start
263 + resource_size(&nfit_res->res)) {
264 pr_debug("%s: start: %llx n: %llx overflow: %pr\n",
270 spin_lock(&nfit_res->lock);
271 list_for_each_entry(req, &nfit_res->requests, list)
272 if (start == req->res.start) {
276 spin_unlock(&nfit_res->lock);
279 WARN(1, "%pr already busy\n", res);
283 req = kzalloc(sizeof(*req), GFP_KERNEL);
286 INIT_LIST_HEAD(&req->list);
290 res->end = start + n - 1;
292 res->flags = resource_type(parent);
293 res->flags |= IORESOURCE_BUSY | flags;
294 spin_lock(&nfit_res->lock);
295 list_add(&req->list, &nfit_res->requests);
296 spin_unlock(&nfit_res->lock);
301 d = devres_alloc(nfit_devres_release,
302 sizeof(struct resource *),
310 pr_debug("%s: %pr\n", __func__, res);
315 return __devm_request_region(dev, parent, start, n, name);
316 return __request_region(parent, start, n, name, flags);
319 struct resource *__wrap___request_region(struct resource *parent,
320 resource_size_t start, resource_size_t n, const char *name,
323 return nfit_test_request_region(NULL, parent, start, n, name, flags);
325 EXPORT_SYMBOL(__wrap___request_region);
327 int __wrap_insert_resource(struct resource *parent, struct resource *res)
329 if (get_nfit_res(res->start))
331 return insert_resource(parent, res);
333 EXPORT_SYMBOL(__wrap_insert_resource);
335 int __wrap_remove_resource(struct resource *res)
337 if (get_nfit_res(res->start))
339 return remove_resource(res);
341 EXPORT_SYMBOL(__wrap_remove_resource);
343 struct resource *__wrap___devm_request_region(struct device *dev,
344 struct resource *parent, resource_size_t start,
345 resource_size_t n, const char *name)
349 return nfit_test_request_region(dev, parent, start, n, name, 0);
351 EXPORT_SYMBOL(__wrap___devm_request_region);
353 void __wrap___release_region(struct resource *parent, resource_size_t start,
356 if (!nfit_test_release_region(NULL, parent, start, n))
357 __release_region(parent, start, n);
359 EXPORT_SYMBOL(__wrap___release_region);
361 void __wrap___devm_release_region(struct device *dev, struct resource *parent,
362 resource_size_t start, resource_size_t n)
364 if (!nfit_test_release_region(dev, parent, start, n))
365 __devm_release_region(dev, parent, start, n);
367 EXPORT_SYMBOL(__wrap___devm_release_region);
369 acpi_status __wrap_acpi_evaluate_object(acpi_handle handle, acpi_string path,
370 struct acpi_object_list *p, struct acpi_buffer *buf)
372 struct nfit_test_resource *nfit_res = get_nfit_res((long) handle);
373 union acpi_object **obj;
375 if (!nfit_res || strcmp(path, "_FIT") || !buf)
376 return acpi_evaluate_object(handle, path, p, buf);
379 buf->length = sizeof(union acpi_object);
383 EXPORT_SYMBOL(__wrap_acpi_evaluate_object);
385 union acpi_object * __wrap_acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid,
386 u64 rev, u64 func, union acpi_object *argv4)
388 union acpi_object *obj = ERR_PTR(-ENXIO);
389 struct iomap_ops *ops;
392 ops = list_first_or_null_rcu(&iomap_head, typeof(*ops), list);
394 obj = ops->evaluate_dsm(handle, guid, rev, func, argv4);
398 return acpi_evaluate_dsm(handle, guid, rev, func, argv4);
401 EXPORT_SYMBOL(__wrap_acpi_evaluate_dsm);
403 MODULE_LICENSE("GPL v2");