1
2#include <linux/err.h>
3#include <linux/pci.h>
4#include <linux/io.h>
5#include <linux/gfp.h>
6#include <linux/export.h>
7#include <linux/of_address.h>
8
9enum devm_ioremap_type {
10 DEVM_IOREMAP = 0,
11 DEVM_IOREMAP_NC,
12 DEVM_IOREMAP_WC,
13};
14
15void devm_ioremap_release(struct device *dev, void *res)
16{
17 iounmap(*(void __iomem **)res);
18}
19
20static int devm_ioremap_match(struct device *dev, void *res, void *match_data)
21{
22 return *(void **)res == match_data;
23}
24
25static void __iomem *__devm_ioremap(struct device *dev, resource_size_t offset,
26 resource_size_t size,
27 enum devm_ioremap_type type)
28{
29 void __iomem **ptr, *addr = NULL;
30
31 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
32 if (!ptr)
33 return NULL;
34
35 switch (type) {
36 case DEVM_IOREMAP:
37 addr = ioremap(offset, size);
38 break;
39 case DEVM_IOREMAP_NC:
40 addr = ioremap_nocache(offset, size);
41 break;
42 case DEVM_IOREMAP_WC:
43 addr = ioremap_wc(offset, size);
44 break;
45 }
46
47 if (addr) {
48 *ptr = addr;
49 devres_add(dev, ptr);
50 } else
51 devres_free(ptr);
52
53 return addr;
54}
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62
63
64void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
65 resource_size_t size)
66{
67 return __devm_ioremap(dev, offset, size, DEVM_IOREMAP);
68}
69EXPORT_SYMBOL(devm_ioremap);
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78
79
80void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
81 resource_size_t size)
82{
83 return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_NC);
84}
85EXPORT_SYMBOL(devm_ioremap_nocache);
86
87
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90
91
92
93
94
95void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
96 resource_size_t size)
97{
98 return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_WC);
99}
100EXPORT_SYMBOL(devm_ioremap_wc);
101
102
103
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107
108
109void devm_iounmap(struct device *dev, void __iomem *addr)
110{
111 WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
112 (__force void *)addr));
113 iounmap(addr);
114}
115EXPORT_SYMBOL(devm_iounmap);
116
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133
134void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res)
135{
136 resource_size_t size;
137 const char *name;
138 void __iomem *dest_ptr;
139
140 BUG_ON(!dev);
141
142 if (!res || resource_type(res) != IORESOURCE_MEM) {
143 dev_err(dev, "invalid resource\n");
144 return IOMEM_ERR_PTR(-EINVAL);
145 }
146
147 size = resource_size(res);
148 name = res->name ?: dev_name(dev);
149
150 if (!devm_request_mem_region(dev, res->start, size, name)) {
151 dev_err(dev, "can't request region for resource %pR\n", res);
152 return IOMEM_ERR_PTR(-EBUSY);
153 }
154
155 dest_ptr = devm_ioremap(dev, res->start, size);
156 if (!dest_ptr) {
157 dev_err(dev, "ioremap failed for resource %pR\n", res);
158 devm_release_mem_region(dev, res->start, size);
159 dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
160 }
161
162 return dest_ptr;
163}
164EXPORT_SYMBOL(devm_ioremap_resource);
165
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187
188void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index,
189 resource_size_t *size)
190{
191 struct resource res;
192
193 if (of_address_to_resource(node, index, &res))
194 return IOMEM_ERR_PTR(-EINVAL);
195 if (size)
196 *size = resource_size(&res);
197 return devm_ioremap_resource(dev, &res);
198}
199EXPORT_SYMBOL(devm_of_iomap);
200
201#ifdef CONFIG_HAS_IOPORT_MAP
202
203
204
205static void devm_ioport_map_release(struct device *dev, void *res)
206{
207 ioport_unmap(*(void __iomem **)res);
208}
209
210static int devm_ioport_map_match(struct device *dev, void *res,
211 void *match_data)
212{
213 return *(void **)res == match_data;
214}
215
216
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220
221
222
223
224
225void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
226 unsigned int nr)
227{
228 void __iomem **ptr, *addr;
229
230 ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
231 if (!ptr)
232 return NULL;
233
234 addr = ioport_map(port, nr);
235 if (addr) {
236 *ptr = addr;
237 devres_add(dev, ptr);
238 } else
239 devres_free(ptr);
240
241 return addr;
242}
243EXPORT_SYMBOL(devm_ioport_map);
244
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251
252
253void devm_ioport_unmap(struct device *dev, void __iomem *addr)
254{
255 ioport_unmap(addr);
256 WARN_ON(devres_destroy(dev, devm_ioport_map_release,
257 devm_ioport_map_match, (__force void *)addr));
258}
259EXPORT_SYMBOL(devm_ioport_unmap);
260#endif
261
262#ifdef CONFIG_PCI
263
264
265
266#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
267
268struct pcim_iomap_devres {
269 void __iomem *table[PCIM_IOMAP_MAX];
270};
271
272static void pcim_iomap_release(struct device *gendev, void *res)
273{
274 struct pci_dev *dev = to_pci_dev(gendev);
275 struct pcim_iomap_devres *this = res;
276 int i;
277
278 for (i = 0; i < PCIM_IOMAP_MAX; i++)
279 if (this->table[i])
280 pci_iounmap(dev, this->table[i]);
281}
282
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294
295
296void __iomem * const *pcim_iomap_table(struct pci_dev *pdev)
297{
298 struct pcim_iomap_devres *dr, *new_dr;
299
300 dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
301 if (dr)
302 return dr->table;
303
304 new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
305 if (!new_dr)
306 return NULL;
307 dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
308 return dr->table;
309}
310EXPORT_SYMBOL(pcim_iomap_table);
311
312
313
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317
318
319
320
321void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
322{
323 void __iomem **tbl;
324
325 BUG_ON(bar >= PCIM_IOMAP_MAX);
326
327 tbl = (void __iomem **)pcim_iomap_table(pdev);
328 if (!tbl || tbl[bar])
329 return NULL;
330
331 tbl[bar] = pci_iomap(pdev, bar, maxlen);
332 return tbl[bar];
333}
334EXPORT_SYMBOL(pcim_iomap);
335
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341
342
343void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
344{
345 void __iomem **tbl;
346 int i;
347
348 pci_iounmap(pdev, addr);
349
350 tbl = (void __iomem **)pcim_iomap_table(pdev);
351 BUG_ON(!tbl);
352
353 for (i = 0; i < PCIM_IOMAP_MAX; i++)
354 if (tbl[i] == addr) {
355 tbl[i] = NULL;
356 return;
357 }
358 WARN_ON(1);
359}
360EXPORT_SYMBOL(pcim_iounmap);
361
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368
369
370int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name)
371{
372 void __iomem * const *iomap;
373 int i, rc;
374
375 iomap = pcim_iomap_table(pdev);
376 if (!iomap)
377 return -ENOMEM;
378
379 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
380 unsigned long len;
381
382 if (!(mask & (1 << i)))
383 continue;
384
385 rc = -EINVAL;
386 len = pci_resource_len(pdev, i);
387 if (!len)
388 goto err_inval;
389
390 rc = pci_request_region(pdev, i, name);
391 if (rc)
392 goto err_inval;
393
394 rc = -ENOMEM;
395 if (!pcim_iomap(pdev, i, 0))
396 goto err_region;
397 }
398
399 return 0;
400
401 err_region:
402 pci_release_region(pdev, i);
403 err_inval:
404 while (--i >= 0) {
405 if (!(mask & (1 << i)))
406 continue;
407 pcim_iounmap(pdev, iomap[i]);
408 pci_release_region(pdev, i);
409 }
410
411 return rc;
412}
413EXPORT_SYMBOL(pcim_iomap_regions);
414
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420
421
422
423int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
424 const char *name)
425{
426 int request_mask = ((1 << 6) - 1) & ~mask;
427 int rc;
428
429 rc = pci_request_selected_regions(pdev, request_mask, name);
430 if (rc)
431 return rc;
432
433 rc = pcim_iomap_regions(pdev, mask, name);
434 if (rc)
435 pci_release_selected_regions(pdev, request_mask);
436 return rc;
437}
438EXPORT_SYMBOL(pcim_iomap_regions_request_all);
439
440
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444
445
446
447void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
448{
449 void __iomem * const *iomap;
450 int i;
451
452 iomap = pcim_iomap_table(pdev);
453 if (!iomap)
454 return;
455
456 for (i = 0; i < PCIM_IOMAP_MAX; i++) {
457 if (!(mask & (1 << i)))
458 continue;
459
460 pcim_iounmap(pdev, iomap[i]);
461 pci_release_region(pdev, i);
462 }
463}
464EXPORT_SYMBOL(pcim_iounmap_regions);
465#endif
466