1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright(c) 2013-2015 Intel Corporation. All rights reserved.
5 #include <linux/memremap.h>
6 #include <linux/rculist.h>
7 #include <linux/export.h>
8 #include <linux/ioport.h>
9 #include <linux/module.h>
10 #include <linux/types.h>
11 #include <linux/pfn_t.h>
12 #include <linux/acpi.h>
15 #include "nfit_test.h"
17 static LIST_HEAD(iomap_head);
19 static struct iomap_ops {
20 nfit_test_lookup_fn nfit_test_lookup;
21 nfit_test_evaluate_dsm_fn evaluate_dsm;
22 struct list_head list;
24 .list = LIST_HEAD_INIT(iomap_ops.list),
27 void nfit_test_setup(nfit_test_lookup_fn lookup,
28 nfit_test_evaluate_dsm_fn evaluate)
30 iomap_ops.nfit_test_lookup = lookup;
31 iomap_ops.evaluate_dsm = evaluate;
32 list_add_rcu(&iomap_ops.list, &iomap_head);
34 EXPORT_SYMBOL(nfit_test_setup);
36 void nfit_test_teardown(void)
38 list_del_rcu(&iomap_ops.list);
41 EXPORT_SYMBOL(nfit_test_teardown);
43 static struct nfit_test_resource *__get_nfit_res(resource_size_t resource)
45 struct iomap_ops *ops;
47 ops = list_first_or_null_rcu(&iomap_head, typeof(*ops), list);
49 return ops->nfit_test_lookup(resource);
53 struct nfit_test_resource *get_nfit_res(resource_size_t resource)
55 struct nfit_test_resource *res;
58 res = __get_nfit_res(resource);
63 EXPORT_SYMBOL(get_nfit_res);
65 #define __nfit_test_ioremap(offset, size, fallback_fn) ({ \
66 struct nfit_test_resource *nfit_res = get_nfit_res(offset); \
68 (void __iomem *) nfit_res->buf + (offset) \
69 - nfit_res->res.start \
71 fallback_fn((offset), (size)) ; \
74 void __iomem *__wrap_devm_ioremap(struct device *dev,
75 resource_size_t offset, unsigned long size)
77 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
80 return (void __iomem *) nfit_res->buf + offset
81 - nfit_res->res.start;
82 return devm_ioremap(dev, offset, size);
84 EXPORT_SYMBOL(__wrap_devm_ioremap);
86 void *__wrap_devm_memremap(struct device *dev, resource_size_t offset,
87 size_t size, unsigned long flags)
89 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
92 return nfit_res->buf + offset - nfit_res->res.start;
93 return devm_memremap(dev, offset, size, flags);
95 EXPORT_SYMBOL(__wrap_devm_memremap);
97 static void nfit_test_kill(void *_pgmap)
99 struct dev_pagemap *pgmap = _pgmap;
103 percpu_ref_kill(&pgmap->ref);
105 wait_for_completion(&pgmap->done);
106 percpu_ref_exit(&pgmap->ref);
109 static void dev_pagemap_percpu_release(struct percpu_ref *ref)
111 struct dev_pagemap *pgmap = container_of(ref, struct dev_pagemap, ref);
113 complete(&pgmap->done);
116 void *__wrap_devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap)
119 resource_size_t offset = pgmap->range.start;
120 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
123 return devm_memremap_pages(dev, pgmap);
125 init_completion(&pgmap->done);
126 error = percpu_ref_init(&pgmap->ref, dev_pagemap_percpu_release, 0,
129 return ERR_PTR(error);
131 error = devm_add_action_or_reset(dev, nfit_test_kill, pgmap);
133 return ERR_PTR(error);
134 return nfit_res->buf + offset - nfit_res->res.start;
136 EXPORT_SYMBOL_GPL(__wrap_devm_memremap_pages);
138 pfn_t __wrap_phys_to_pfn_t(phys_addr_t addr, unsigned long flags)
140 struct nfit_test_resource *nfit_res = get_nfit_res(addr);
144 return phys_to_pfn_t(addr, flags);
146 EXPORT_SYMBOL(__wrap_phys_to_pfn_t);
148 void *__wrap_memremap(resource_size_t offset, size_t size,
151 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
154 return nfit_res->buf + offset - nfit_res->res.start;
155 return memremap(offset, size, flags);
157 EXPORT_SYMBOL(__wrap_memremap);
159 void __wrap_devm_memunmap(struct device *dev, void *addr)
161 struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
165 return devm_memunmap(dev, addr);
167 EXPORT_SYMBOL(__wrap_devm_memunmap);
169 void __iomem *__wrap_ioremap(resource_size_t offset, unsigned long size)
171 return __nfit_test_ioremap(offset, size, ioremap);
173 EXPORT_SYMBOL(__wrap_ioremap);
175 void __iomem *__wrap_ioremap_wc(resource_size_t offset, unsigned long size)
177 return __nfit_test_ioremap(offset, size, ioremap_wc);
179 EXPORT_SYMBOL(__wrap_ioremap_wc);
181 void __wrap_iounmap(volatile void __iomem *addr)
183 struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
186 return iounmap(addr);
188 EXPORT_SYMBOL(__wrap_iounmap);
190 void __wrap_memunmap(void *addr)
192 struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
196 return memunmap(addr);
198 EXPORT_SYMBOL(__wrap_memunmap);
200 static bool nfit_test_release_region(struct device *dev,
201 struct resource *parent, resource_size_t start,
204 static void nfit_devres_release(struct device *dev, void *data)
206 struct resource *res = *((struct resource **) data);
208 WARN_ON(!nfit_test_release_region(NULL, &iomem_resource, res->start,
209 resource_size(res)));
212 static int match(struct device *dev, void *__res, void *match_data)
214 struct resource *res = *((struct resource **) __res);
215 resource_size_t start = *((resource_size_t *) match_data);
217 return res->start == start;
220 static bool nfit_test_release_region(struct device *dev,
221 struct resource *parent, resource_size_t start,
224 if (parent == &iomem_resource) {
225 struct nfit_test_resource *nfit_res = get_nfit_res(start);
228 struct nfit_test_request *req;
229 struct resource *res = NULL;
232 devres_release(dev, nfit_devres_release, match,
237 spin_lock(&nfit_res->lock);
238 list_for_each_entry(req, &nfit_res->requests, list)
239 if (req->res.start == start) {
241 list_del(&req->list);
244 spin_unlock(&nfit_res->lock);
246 WARN(!res || resource_size(res) != n,
247 "%s: start: %llx n: %llx mismatch: %pr\n",
248 __func__, start, n, res);
257 static struct resource *nfit_test_request_region(struct device *dev,
258 struct resource *parent, resource_size_t start,
259 resource_size_t n, const char *name, int flags)
261 struct nfit_test_resource *nfit_res;
263 if (parent == &iomem_resource) {
264 nfit_res = get_nfit_res(start);
266 struct nfit_test_request *req;
267 struct resource *res = NULL;
269 if (start + n > nfit_res->res.start
270 + resource_size(&nfit_res->res)) {
271 pr_debug("%s: start: %llx n: %llx overflow: %pr\n",
277 spin_lock(&nfit_res->lock);
278 list_for_each_entry(req, &nfit_res->requests, list)
279 if (start == req->res.start) {
283 spin_unlock(&nfit_res->lock);
286 WARN(1, "%pr already busy\n", res);
290 req = kzalloc(sizeof(*req), GFP_KERNEL);
293 INIT_LIST_HEAD(&req->list);
297 res->end = start + n - 1;
299 res->flags = resource_type(parent);
300 res->flags |= IORESOURCE_BUSY | flags;
301 spin_lock(&nfit_res->lock);
302 list_add(&req->list, &nfit_res->requests);
303 spin_unlock(&nfit_res->lock);
308 d = devres_alloc(nfit_devres_release,
309 sizeof(struct resource *),
317 pr_debug("%s: %pr\n", __func__, res);
322 return __devm_request_region(dev, parent, start, n, name);
323 return __request_region(parent, start, n, name, flags);
326 struct resource *__wrap___request_region(struct resource *parent,
327 resource_size_t start, resource_size_t n, const char *name,
330 return nfit_test_request_region(NULL, parent, start, n, name, flags);
332 EXPORT_SYMBOL(__wrap___request_region);
334 int __wrap_insert_resource(struct resource *parent, struct resource *res)
336 if (get_nfit_res(res->start))
338 return insert_resource(parent, res);
340 EXPORT_SYMBOL(__wrap_insert_resource);
342 int __wrap_remove_resource(struct resource *res)
344 if (get_nfit_res(res->start))
346 return remove_resource(res);
348 EXPORT_SYMBOL(__wrap_remove_resource);
350 struct resource *__wrap___devm_request_region(struct device *dev,
351 struct resource *parent, resource_size_t start,
352 resource_size_t n, const char *name)
356 return nfit_test_request_region(dev, parent, start, n, name, 0);
358 EXPORT_SYMBOL(__wrap___devm_request_region);
360 void __wrap___release_region(struct resource *parent, resource_size_t start,
363 if (!nfit_test_release_region(NULL, parent, start, n))
364 __release_region(parent, start, n);
366 EXPORT_SYMBOL(__wrap___release_region);
368 void __wrap___devm_release_region(struct device *dev, struct resource *parent,
369 resource_size_t start, resource_size_t n)
371 if (!nfit_test_release_region(dev, parent, start, n))
372 __devm_release_region(dev, parent, start, n);
374 EXPORT_SYMBOL(__wrap___devm_release_region);
376 acpi_status __wrap_acpi_evaluate_object(acpi_handle handle, acpi_string path,
377 struct acpi_object_list *p, struct acpi_buffer *buf)
379 struct nfit_test_resource *nfit_res = get_nfit_res((long) handle);
380 union acpi_object **obj;
382 if (!nfit_res || strcmp(path, "_FIT") || !buf)
383 return acpi_evaluate_object(handle, path, p, buf);
386 buf->length = sizeof(union acpi_object);
390 EXPORT_SYMBOL(__wrap_acpi_evaluate_object);
392 union acpi_object * __wrap_acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid,
393 u64 rev, u64 func, union acpi_object *argv4)
395 union acpi_object *obj = ERR_PTR(-ENXIO);
396 struct iomap_ops *ops;
399 ops = list_first_or_null_rcu(&iomap_head, typeof(*ops), list);
401 obj = ops->evaluate_dsm(handle, guid, rev, func, argv4);
405 return acpi_evaluate_dsm(handle, guid, rev, func, argv4);
408 EXPORT_SYMBOL(__wrap_acpi_evaluate_dsm);
410 MODULE_LICENSE("GPL v2");