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 void *__wrap_devm_memremap_pages(struct device *dev, struct resource *res,
108 struct percpu_ref *ref, struct vmem_altmap *altmap)
110 resource_size_t offset = res->start;
111 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
114 return nfit_res->buf + offset - nfit_res->res.start;
115 return devm_memremap_pages(dev, res, ref, altmap);
117 EXPORT_SYMBOL(__wrap_devm_memremap_pages);
119 pfn_t __wrap_phys_to_pfn_t(phys_addr_t addr, unsigned long flags)
121 struct nfit_test_resource *nfit_res = get_nfit_res(addr);
125 return phys_to_pfn_t(addr, flags);
127 EXPORT_SYMBOL(__wrap_phys_to_pfn_t);
129 void *__wrap_memremap(resource_size_t offset, size_t size,
132 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
135 return nfit_res->buf + offset - nfit_res->res.start;
136 return memremap(offset, size, flags);
138 EXPORT_SYMBOL(__wrap_memremap);
140 void __wrap_devm_memunmap(struct device *dev, void *addr)
142 struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
146 return devm_memunmap(dev, addr);
148 EXPORT_SYMBOL(__wrap_devm_memunmap);
150 void __iomem *__wrap_ioremap_nocache(resource_size_t offset, unsigned long size)
152 return __nfit_test_ioremap(offset, size, ioremap_nocache);
154 EXPORT_SYMBOL(__wrap_ioremap_nocache);
156 void __iomem *__wrap_ioremap_wc(resource_size_t offset, unsigned long size)
158 return __nfit_test_ioremap(offset, size, ioremap_wc);
160 EXPORT_SYMBOL(__wrap_ioremap_wc);
162 void __wrap_iounmap(volatile void __iomem *addr)
164 struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
167 return iounmap(addr);
169 EXPORT_SYMBOL(__wrap_iounmap);
171 void __wrap_memunmap(void *addr)
173 struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
177 return memunmap(addr);
179 EXPORT_SYMBOL(__wrap_memunmap);
181 static bool nfit_test_release_region(struct device *dev,
182 struct resource *parent, resource_size_t start,
185 static void nfit_devres_release(struct device *dev, void *data)
187 struct resource *res = *((struct resource **) data);
189 WARN_ON(!nfit_test_release_region(NULL, &iomem_resource, res->start,
190 resource_size(res)));
193 static int match(struct device *dev, void *__res, void *match_data)
195 struct resource *res = *((struct resource **) __res);
196 resource_size_t start = *((resource_size_t *) match_data);
198 return res->start == start;
201 static bool nfit_test_release_region(struct device *dev,
202 struct resource *parent, resource_size_t start,
205 if (parent == &iomem_resource) {
206 struct nfit_test_resource *nfit_res = get_nfit_res(start);
209 struct nfit_test_request *req;
210 struct resource *res = NULL;
213 devres_release(dev, nfit_devres_release, match,
218 spin_lock(&nfit_res->lock);
219 list_for_each_entry(req, &nfit_res->requests, list)
220 if (req->res.start == start) {
222 list_del(&req->list);
225 spin_unlock(&nfit_res->lock);
227 WARN(!res || resource_size(res) != n,
228 "%s: start: %llx n: %llx mismatch: %pr\n",
229 __func__, start, n, res);
238 static struct resource *nfit_test_request_region(struct device *dev,
239 struct resource *parent, resource_size_t start,
240 resource_size_t n, const char *name, int flags)
242 struct nfit_test_resource *nfit_res;
244 if (parent == &iomem_resource) {
245 nfit_res = get_nfit_res(start);
247 struct nfit_test_request *req;
248 struct resource *res = NULL;
250 if (start + n > nfit_res->res.start
251 + resource_size(&nfit_res->res)) {
252 pr_debug("%s: start: %llx n: %llx overflow: %pr\n",
258 spin_lock(&nfit_res->lock);
259 list_for_each_entry(req, &nfit_res->requests, list)
260 if (start == req->res.start) {
264 spin_unlock(&nfit_res->lock);
267 WARN(1, "%pr already busy\n", res);
271 req = kzalloc(sizeof(*req), GFP_KERNEL);
274 INIT_LIST_HEAD(&req->list);
278 res->end = start + n - 1;
280 res->flags = resource_type(parent);
281 res->flags |= IORESOURCE_BUSY | flags;
282 spin_lock(&nfit_res->lock);
283 list_add(&req->list, &nfit_res->requests);
284 spin_unlock(&nfit_res->lock);
289 d = devres_alloc(nfit_devres_release,
290 sizeof(struct resource *),
298 pr_debug("%s: %pr\n", __func__, res);
303 return __devm_request_region(dev, parent, start, n, name);
304 return __request_region(parent, start, n, name, flags);
307 struct resource *__wrap___request_region(struct resource *parent,
308 resource_size_t start, resource_size_t n, const char *name,
311 return nfit_test_request_region(NULL, parent, start, n, name, flags);
313 EXPORT_SYMBOL(__wrap___request_region);
315 int __wrap_insert_resource(struct resource *parent, struct resource *res)
317 if (get_nfit_res(res->start))
319 return insert_resource(parent, res);
321 EXPORT_SYMBOL(__wrap_insert_resource);
323 int __wrap_remove_resource(struct resource *res)
325 if (get_nfit_res(res->start))
327 return remove_resource(res);
329 EXPORT_SYMBOL(__wrap_remove_resource);
331 struct resource *__wrap___devm_request_region(struct device *dev,
332 struct resource *parent, resource_size_t start,
333 resource_size_t n, const char *name)
337 return nfit_test_request_region(dev, parent, start, n, name, 0);
339 EXPORT_SYMBOL(__wrap___devm_request_region);
341 void __wrap___release_region(struct resource *parent, resource_size_t start,
344 if (!nfit_test_release_region(NULL, parent, start, n))
345 __release_region(parent, start, n);
347 EXPORT_SYMBOL(__wrap___release_region);
349 void __wrap___devm_release_region(struct device *dev, struct resource *parent,
350 resource_size_t start, resource_size_t n)
352 if (!nfit_test_release_region(dev, parent, start, n))
353 __devm_release_region(dev, parent, start, n);
355 EXPORT_SYMBOL(__wrap___devm_release_region);
357 acpi_status __wrap_acpi_evaluate_object(acpi_handle handle, acpi_string path,
358 struct acpi_object_list *p, struct acpi_buffer *buf)
360 struct nfit_test_resource *nfit_res = get_nfit_res((long) handle);
361 union acpi_object **obj;
363 if (!nfit_res || strcmp(path, "_FIT") || !buf)
364 return acpi_evaluate_object(handle, path, p, buf);
367 buf->length = sizeof(union acpi_object);
371 EXPORT_SYMBOL(__wrap_acpi_evaluate_object);
373 union acpi_object * __wrap_acpi_evaluate_dsm(acpi_handle handle, const u8 *uuid,
374 u64 rev, u64 func, union acpi_object *argv4)
376 union acpi_object *obj = ERR_PTR(-ENXIO);
377 struct iomap_ops *ops;
380 ops = list_first_or_null_rcu(&iomap_head, typeof(*ops), list);
382 obj = ops->evaluate_dsm(handle, uuid, rev, func, argv4);
386 return acpi_evaluate_dsm(handle, uuid, rev, func, argv4);
389 EXPORT_SYMBOL(__wrap_acpi_evaluate_dsm);
391 MODULE_LICENSE("GPL v2");