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 void __iomem *__nfit_test_ioremap(resource_size_t offset, unsigned long size,
66 void __iomem *(*fallback_fn)(resource_size_t, unsigned long))
68 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
71 return (void __iomem *) nfit_res->buf + offset
72 - nfit_res->res.start;
73 return fallback_fn(offset, size);
76 void __iomem *__wrap_devm_ioremap_nocache(struct device *dev,
77 resource_size_t offset, unsigned long size)
79 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
82 return (void __iomem *) nfit_res->buf + offset
83 - nfit_res->res.start;
84 return devm_ioremap_nocache(dev, offset, size);
86 EXPORT_SYMBOL(__wrap_devm_ioremap_nocache);
88 void *__wrap_devm_memremap(struct device *dev, resource_size_t offset,
89 size_t size, unsigned long flags)
91 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
94 return nfit_res->buf + offset - nfit_res->res.start;
95 return devm_memremap(dev, offset, size, flags);
97 EXPORT_SYMBOL(__wrap_devm_memremap);
99 static void nfit_test_kill(void *_pgmap)
101 struct dev_pagemap *pgmap = _pgmap;
103 WARN_ON(!pgmap || !pgmap->ref || !pgmap->kill || !pgmap->cleanup);
104 pgmap->kill(pgmap->ref);
105 pgmap->cleanup(pgmap->ref);
108 void *__wrap_devm_memremap_pages(struct device *dev, struct dev_pagemap *pgmap)
110 resource_size_t offset = pgmap->res.start;
111 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
116 rc = devm_add_action_or_reset(dev, nfit_test_kill, pgmap);
119 return nfit_res->buf + offset - nfit_res->res.start;
121 return devm_memremap_pages(dev, pgmap);
123 EXPORT_SYMBOL_GPL(__wrap_devm_memremap_pages);
125 pfn_t __wrap_phys_to_pfn_t(phys_addr_t addr, unsigned long flags)
127 struct nfit_test_resource *nfit_res = get_nfit_res(addr);
131 return phys_to_pfn_t(addr, flags);
133 EXPORT_SYMBOL(__wrap_phys_to_pfn_t);
135 void *__wrap_memremap(resource_size_t offset, size_t size,
138 struct nfit_test_resource *nfit_res = get_nfit_res(offset);
141 return nfit_res->buf + offset - nfit_res->res.start;
142 return memremap(offset, size, flags);
144 EXPORT_SYMBOL(__wrap_memremap);
146 void __wrap_devm_memunmap(struct device *dev, void *addr)
148 struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
152 return devm_memunmap(dev, addr);
154 EXPORT_SYMBOL(__wrap_devm_memunmap);
156 void __iomem *__wrap_ioremap_nocache(resource_size_t offset, unsigned long size)
158 return __nfit_test_ioremap(offset, size, ioremap_nocache);
160 EXPORT_SYMBOL(__wrap_ioremap_nocache);
162 void __iomem *__wrap_ioremap_wc(resource_size_t offset, unsigned long size)
164 return __nfit_test_ioremap(offset, size, ioremap_wc);
166 EXPORT_SYMBOL(__wrap_ioremap_wc);
168 void __wrap_iounmap(volatile void __iomem *addr)
170 struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
173 return iounmap(addr);
175 EXPORT_SYMBOL(__wrap_iounmap);
177 void __wrap_memunmap(void *addr)
179 struct nfit_test_resource *nfit_res = get_nfit_res((long) addr);
183 return memunmap(addr);
185 EXPORT_SYMBOL(__wrap_memunmap);
187 static bool nfit_test_release_region(struct device *dev,
188 struct resource *parent, resource_size_t start,
191 static void nfit_devres_release(struct device *dev, void *data)
193 struct resource *res = *((struct resource **) data);
195 WARN_ON(!nfit_test_release_region(NULL, &iomem_resource, res->start,
196 resource_size(res)));
199 static int match(struct device *dev, void *__res, void *match_data)
201 struct resource *res = *((struct resource **) __res);
202 resource_size_t start = *((resource_size_t *) match_data);
204 return res->start == start;
207 static bool nfit_test_release_region(struct device *dev,
208 struct resource *parent, resource_size_t start,
211 if (parent == &iomem_resource) {
212 struct nfit_test_resource *nfit_res = get_nfit_res(start);
215 struct nfit_test_request *req;
216 struct resource *res = NULL;
219 devres_release(dev, nfit_devres_release, match,
224 spin_lock(&nfit_res->lock);
225 list_for_each_entry(req, &nfit_res->requests, list)
226 if (req->res.start == start) {
228 list_del(&req->list);
231 spin_unlock(&nfit_res->lock);
233 WARN(!res || resource_size(res) != n,
234 "%s: start: %llx n: %llx mismatch: %pr\n",
235 __func__, start, n, res);
244 static struct resource *nfit_test_request_region(struct device *dev,
245 struct resource *parent, resource_size_t start,
246 resource_size_t n, const char *name, int flags)
248 struct nfit_test_resource *nfit_res;
250 if (parent == &iomem_resource) {
251 nfit_res = get_nfit_res(start);
253 struct nfit_test_request *req;
254 struct resource *res = NULL;
256 if (start + n > nfit_res->res.start
257 + resource_size(&nfit_res->res)) {
258 pr_debug("%s: start: %llx n: %llx overflow: %pr\n",
264 spin_lock(&nfit_res->lock);
265 list_for_each_entry(req, &nfit_res->requests, list)
266 if (start == req->res.start) {
270 spin_unlock(&nfit_res->lock);
273 WARN(1, "%pr already busy\n", res);
277 req = kzalloc(sizeof(*req), GFP_KERNEL);
280 INIT_LIST_HEAD(&req->list);
284 res->end = start + n - 1;
286 res->flags = resource_type(parent);
287 res->flags |= IORESOURCE_BUSY | flags;
288 spin_lock(&nfit_res->lock);
289 list_add(&req->list, &nfit_res->requests);
290 spin_unlock(&nfit_res->lock);
295 d = devres_alloc(nfit_devres_release,
296 sizeof(struct resource *),
304 pr_debug("%s: %pr\n", __func__, res);
309 return __devm_request_region(dev, parent, start, n, name);
310 return __request_region(parent, start, n, name, flags);
313 struct resource *__wrap___request_region(struct resource *parent,
314 resource_size_t start, resource_size_t n, const char *name,
317 return nfit_test_request_region(NULL, parent, start, n, name, flags);
319 EXPORT_SYMBOL(__wrap___request_region);
321 int __wrap_insert_resource(struct resource *parent, struct resource *res)
323 if (get_nfit_res(res->start))
325 return insert_resource(parent, res);
327 EXPORT_SYMBOL(__wrap_insert_resource);
329 int __wrap_remove_resource(struct resource *res)
331 if (get_nfit_res(res->start))
333 return remove_resource(res);
335 EXPORT_SYMBOL(__wrap_remove_resource);
337 struct resource *__wrap___devm_request_region(struct device *dev,
338 struct resource *parent, resource_size_t start,
339 resource_size_t n, const char *name)
343 return nfit_test_request_region(dev, parent, start, n, name, 0);
345 EXPORT_SYMBOL(__wrap___devm_request_region);
347 void __wrap___release_region(struct resource *parent, resource_size_t start,
350 if (!nfit_test_release_region(NULL, parent, start, n))
351 __release_region(parent, start, n);
353 EXPORT_SYMBOL(__wrap___release_region);
355 void __wrap___devm_release_region(struct device *dev, struct resource *parent,
356 resource_size_t start, resource_size_t n)
358 if (!nfit_test_release_region(dev, parent, start, n))
359 __devm_release_region(dev, parent, start, n);
361 EXPORT_SYMBOL(__wrap___devm_release_region);
363 acpi_status __wrap_acpi_evaluate_object(acpi_handle handle, acpi_string path,
364 struct acpi_object_list *p, struct acpi_buffer *buf)
366 struct nfit_test_resource *nfit_res = get_nfit_res((long) handle);
367 union acpi_object **obj;
369 if (!nfit_res || strcmp(path, "_FIT") || !buf)
370 return acpi_evaluate_object(handle, path, p, buf);
373 buf->length = sizeof(union acpi_object);
377 EXPORT_SYMBOL(__wrap_acpi_evaluate_object);
379 union acpi_object * __wrap_acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid,
380 u64 rev, u64 func, union acpi_object *argv4)
382 union acpi_object *obj = ERR_PTR(-ENXIO);
383 struct iomap_ops *ops;
386 ops = list_first_or_null_rcu(&iomap_head, typeof(*ops), list);
388 obj = ops->evaluate_dsm(handle, guid, rev, func, argv4);
392 return acpi_evaluate_dsm(handle, guid, rev, func, argv4);
395 EXPORT_SYMBOL(__wrap_acpi_evaluate_dsm);
397 MODULE_LICENSE("GPL v2");