1#include <linux/err.h>
2#include <linux/pci.h>
3#include <linux/io.h>
4#include <linux/gfp.h>
5#include <linux/export.h>
6
7void devm_ioremap_release(struct device *dev, void *res)
8{
9 iounmap(*(void __iomem **)res);
10}
11
12static int devm_ioremap_match(struct device *dev, void *res, void *match_data)
13{
14 return *(void **)res == match_data;
15}
16
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21
22
23
24
25void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
26 unsigned long size)
27{
28 void __iomem **ptr, *addr;
29
30 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
31 if (!ptr)
32 return NULL;
33
34 addr = ioremap(offset, size);
35 if (addr) {
36 *ptr = addr;
37 devres_add(dev, ptr);
38 } else
39 devres_free(ptr);
40
41 return addr;
42}
43EXPORT_SYMBOL(devm_ioremap);
44
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51
52
53
54void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
55 unsigned long size)
56{
57 void __iomem **ptr, *addr;
58
59 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
60 if (!ptr)
61 return NULL;
62
63 addr = ioremap_nocache(offset, size);
64 if (addr) {
65 *ptr = addr;
66 devres_add(dev, ptr);
67 } else
68 devres_free(ptr);
69
70 return addr;
71}
72EXPORT_SYMBOL(devm_ioremap_nocache);
73
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79
80
81void devm_iounmap(struct device *dev, void __iomem *addr)
82{
83 WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
84 (__force void *)addr));
85 iounmap(addr);
86}
87EXPORT_SYMBOL(devm_iounmap);
88
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106
107void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res)
108{
109 resource_size_t size;
110 const char *name;
111 void __iomem *dest_ptr;
112
113 BUG_ON(!dev);
114
115 if (!res || resource_type(res) != IORESOURCE_MEM) {
116 dev_err(dev, "invalid resource\n");
117 return IOMEM_ERR_PTR(-EINVAL);
118 }
119
120 size = resource_size(res);
121 name = res->name ?: dev_name(dev);
122
123 if (!devm_request_mem_region(dev, res->start, size, name)) {
124 dev_err(dev, "can't request region for resource %pR\n", res);
125 return IOMEM_ERR_PTR(-EBUSY);
126 }
127
128 if (res->flags & IORESOURCE_CACHEABLE)
129 dest_ptr = devm_ioremap(dev, res->start, size);
130 else
131 dest_ptr = devm_ioremap_nocache(dev, res->start, size);
132
133 if (!dest_ptr) {
134 dev_err(dev, "ioremap failed for resource %pR\n", res);
135 devm_release_mem_region(dev, res->start, size);
136 dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
137 }
138
139 return dest_ptr;
140}
141EXPORT_SYMBOL(devm_ioremap_resource);
142
143#ifdef CONFIG_HAS_IOPORT_MAP
144
145
146
147static void devm_ioport_map_release(struct device *dev, void *res)
148{
149 ioport_unmap(*(void __iomem **)res);
150}
151
152static int devm_ioport_map_match(struct device *dev, void *res,
153 void *match_data)
154{
155 return *(void **)res == match_data;
156}
157
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163
164
165
166
167void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
168 unsigned int nr)
169{
170 void __iomem **ptr, *addr;
171
172 ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
173 if (!ptr)
174 return NULL;
175
176 addr = ioport_map(port, nr);
177 if (addr) {
178 *ptr = addr;
179 devres_add(dev, ptr);
180 } else
181 devres_free(ptr);
182
183 return addr;
184}
185EXPORT_SYMBOL(devm_ioport_map);
186
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190
191
192
193
194
195void devm_ioport_unmap(struct device *dev, void __iomem *addr)
196{
197 ioport_unmap(addr);
198 WARN_ON(devres_destroy(dev, devm_ioport_map_release,
199 devm_ioport_map_match, (__force void *)addr));
200}
201EXPORT_SYMBOL(devm_ioport_unmap);
202#endif
203
204#ifdef CONFIG_PCI
205
206
207
208#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
209
210struct pcim_iomap_devres {
211 void __iomem *table[PCIM_IOMAP_MAX];
212};
213
214static void pcim_iomap_release(struct device *gendev, void *res)
215{
216 struct pci_dev *dev = container_of(gendev, struct pci_dev, dev);
217 struct pcim_iomap_devres *this = res;
218 int i;
219
220 for (i = 0; i < PCIM_IOMAP_MAX; i++)
221 if (this->table[i])
222 pci_iounmap(dev, this->table[i]);
223}
224
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236
237
238void __iomem * const *pcim_iomap_table(struct pci_dev *pdev)
239{
240 struct pcim_iomap_devres *dr, *new_dr;
241
242 dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
243 if (dr)
244 return dr->table;
245
246 new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
247 if (!new_dr)
248 return NULL;
249 dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
250 return dr->table;
251}
252EXPORT_SYMBOL(pcim_iomap_table);
253
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261
262
263void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
264{
265 void __iomem **tbl;
266
267 BUG_ON(bar >= PCIM_IOMAP_MAX);
268
269 tbl = (void __iomem **)pcim_iomap_table(pdev);
270 if (!tbl || tbl[bar])
271 return NULL;
272
273 tbl[bar] = pci_iomap(pdev, bar, maxlen);
274 return tbl[bar];
275}
276EXPORT_SYMBOL(pcim_iomap);
277
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281
282
283
284
285void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
286{
287 void __iomem **tbl;
288 int i;
289
290 pci_iounmap(pdev, addr);
291
292 tbl = (void __iomem **)pcim_iomap_table(pdev);
293 BUG_ON(!tbl);
294
295 for (i = 0; i < PCIM_IOMAP_MAX; i++)
296 if (tbl[i] == addr) {
297 tbl[i] = NULL;
298 return;
299 }
300 WARN_ON(1);
301}
302EXPORT_SYMBOL(pcim_iounmap);
303
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310
311
312int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name)
313{
314 void __iomem * const *iomap;
315 int i, rc;
316
317 iomap = pcim_iomap_table(pdev);
318 if (!iomap)
319 return -ENOMEM;
320
321 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
322 unsigned long len;
323
324 if (!(mask & (1 << i)))
325 continue;
326
327 rc = -EINVAL;
328 len = pci_resource_len(pdev, i);
329 if (!len)
330 goto err_inval;
331
332 rc = pci_request_region(pdev, i, name);
333 if (rc)
334 goto err_inval;
335
336 rc = -ENOMEM;
337 if (!pcim_iomap(pdev, i, 0))
338 goto err_region;
339 }
340
341 return 0;
342
343 err_region:
344 pci_release_region(pdev, i);
345 err_inval:
346 while (--i >= 0) {
347 if (!(mask & (1 << i)))
348 continue;
349 pcim_iounmap(pdev, iomap[i]);
350 pci_release_region(pdev, i);
351 }
352
353 return rc;
354}
355EXPORT_SYMBOL(pcim_iomap_regions);
356
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362
363
364
365int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
366 const char *name)
367{
368 int request_mask = ((1 << 6) - 1) & ~mask;
369 int rc;
370
371 rc = pci_request_selected_regions(pdev, request_mask, name);
372 if (rc)
373 return rc;
374
375 rc = pcim_iomap_regions(pdev, mask, name);
376 if (rc)
377 pci_release_selected_regions(pdev, request_mask);
378 return rc;
379}
380EXPORT_SYMBOL(pcim_iomap_regions_request_all);
381
382
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384
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386
387
388
389void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
390{
391 void __iomem * const *iomap;
392 int i;
393
394 iomap = pcim_iomap_table(pdev);
395 if (!iomap)
396 return;
397
398 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
399 if (!(mask & (1 << i)))
400 continue;
401
402 pcim_iounmap(pdev, iomap[i]);
403 pci_release_region(pdev, i);
404 }
405}
406EXPORT_SYMBOL(pcim_iounmap_regions);
407#endif
408