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_UC,
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_UC:
40 addr = ioremap_uc(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}
55
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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);
70
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77
78
79void __iomem *devm_ioremap_uc(struct device *dev, resource_size_t offset,
80 resource_size_t size)
81{
82 return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_UC);
83}
84EXPORT_SYMBOL_GPL(devm_ioremap_uc);
85
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91
92
93
94void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
95 resource_size_t size)
96{
97 return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_WC);
98}
99EXPORT_SYMBOL(devm_ioremap_wc);
100
101
102
103
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105
106
107
108void devm_iounmap(struct device *dev, void __iomem *addr)
109{
110 WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
111 (__force void *)addr));
112 iounmap(addr);
113}
114EXPORT_SYMBOL(devm_iounmap);
115
116static void __iomem *
117__devm_ioremap_resource(struct device *dev, const struct resource *res,
118 enum devm_ioremap_type type)
119{
120 resource_size_t size;
121 void __iomem *dest_ptr;
122
123 BUG_ON(!dev);
124
125 if (!res || resource_type(res) != IORESOURCE_MEM) {
126 dev_err(dev, "invalid resource\n");
127 return IOMEM_ERR_PTR(-EINVAL);
128 }
129
130 size = resource_size(res);
131
132 if (!devm_request_mem_region(dev, res->start, size, dev_name(dev))) {
133 dev_err(dev, "can't request region for resource %pR\n", res);
134 return IOMEM_ERR_PTR(-EBUSY);
135 }
136
137 dest_ptr = __devm_ioremap(dev, res->start, size, type);
138 if (!dest_ptr) {
139 dev_err(dev, "ioremap failed for resource %pR\n", res);
140 devm_release_mem_region(dev, res->start, size);
141 dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
142 }
143
144 return dest_ptr;
145}
146
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162
163
164void __iomem *devm_ioremap_resource(struct device *dev,
165 const struct resource *res)
166{
167 return __devm_ioremap_resource(dev, res, DEVM_IOREMAP);
168}
169EXPORT_SYMBOL(devm_ioremap_resource);
170
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178
179
180void __iomem *devm_ioremap_resource_wc(struct device *dev,
181 const struct resource *res)
182{
183 return __devm_ioremap_resource(dev, res, DEVM_IOREMAP_WC);
184}
185
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207
208void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index,
209 resource_size_t *size)
210{
211 struct resource res;
212
213 if (of_address_to_resource(node, index, &res))
214 return IOMEM_ERR_PTR(-EINVAL);
215 if (size)
216 *size = resource_size(&res);
217 return devm_ioremap_resource(dev, &res);
218}
219EXPORT_SYMBOL(devm_of_iomap);
220
221#ifdef CONFIG_HAS_IOPORT_MAP
222
223
224
225static void devm_ioport_map_release(struct device *dev, void *res)
226{
227 ioport_unmap(*(void __iomem **)res);
228}
229
230static int devm_ioport_map_match(struct device *dev, void *res,
231 void *match_data)
232{
233 return *(void **)res == match_data;
234}
235
236
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242
243
244
245void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
246 unsigned int nr)
247{
248 void __iomem **ptr, *addr;
249
250 ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
251 if (!ptr)
252 return NULL;
253
254 addr = ioport_map(port, nr);
255 if (addr) {
256 *ptr = addr;
257 devres_add(dev, ptr);
258 } else
259 devres_free(ptr);
260
261 return addr;
262}
263EXPORT_SYMBOL(devm_ioport_map);
264
265
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268
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270
271
272
273void devm_ioport_unmap(struct device *dev, void __iomem *addr)
274{
275 ioport_unmap(addr);
276 WARN_ON(devres_destroy(dev, devm_ioport_map_release,
277 devm_ioport_map_match, (__force void *)addr));
278}
279EXPORT_SYMBOL(devm_ioport_unmap);
280#endif
281
282#ifdef CONFIG_PCI
283
284
285
286#define PCIM_IOMAP_MAX PCI_STD_NUM_BARS
287
288struct pcim_iomap_devres {
289 void __iomem *table[PCIM_IOMAP_MAX];
290};
291
292static void pcim_iomap_release(struct device *gendev, void *res)
293{
294 struct pci_dev *dev = to_pci_dev(gendev);
295 struct pcim_iomap_devres *this = res;
296 int i;
297
298 for (i = 0; i < PCIM_IOMAP_MAX; i++)
299 if (this->table[i])
300 pci_iounmap(dev, this->table[i]);
301}
302
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313
314
315
316void __iomem * const *pcim_iomap_table(struct pci_dev *pdev)
317{
318 struct pcim_iomap_devres *dr, *new_dr;
319
320 dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
321 if (dr)
322 return dr->table;
323
324 new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
325 if (!new_dr)
326 return NULL;
327 dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
328 return dr->table;
329}
330EXPORT_SYMBOL(pcim_iomap_table);
331
332
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336
337
338
339
340
341void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
342{
343 void __iomem **tbl;
344
345 BUG_ON(bar >= PCIM_IOMAP_MAX);
346
347 tbl = (void __iomem **)pcim_iomap_table(pdev);
348 if (!tbl || tbl[bar])
349 return NULL;
350
351 tbl[bar] = pci_iomap(pdev, bar, maxlen);
352 return tbl[bar];
353}
354EXPORT_SYMBOL(pcim_iomap);
355
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361
362
363void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
364{
365 void __iomem **tbl;
366 int i;
367
368 pci_iounmap(pdev, addr);
369
370 tbl = (void __iomem **)pcim_iomap_table(pdev);
371 BUG_ON(!tbl);
372
373 for (i = 0; i < PCIM_IOMAP_MAX; i++)
374 if (tbl[i] == addr) {
375 tbl[i] = NULL;
376 return;
377 }
378 WARN_ON(1);
379}
380EXPORT_SYMBOL(pcim_iounmap);
381
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388
389
390int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name)
391{
392 void __iomem * const *iomap;
393 int i, rc;
394
395 iomap = pcim_iomap_table(pdev);
396 if (!iomap)
397 return -ENOMEM;
398
399 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
400 unsigned long len;
401
402 if (!(mask & (1 << i)))
403 continue;
404
405 rc = -EINVAL;
406 len = pci_resource_len(pdev, i);
407 if (!len)
408 goto err_inval;
409
410 rc = pci_request_region(pdev, i, name);
411 if (rc)
412 goto err_inval;
413
414 rc = -ENOMEM;
415 if (!pcim_iomap(pdev, i, 0))
416 goto err_region;
417 }
418
419 return 0;
420
421 err_region:
422 pci_release_region(pdev, i);
423 err_inval:
424 while (--i >= 0) {
425 if (!(mask & (1 << i)))
426 continue;
427 pcim_iounmap(pdev, iomap[i]);
428 pci_release_region(pdev, i);
429 }
430
431 return rc;
432}
433EXPORT_SYMBOL(pcim_iomap_regions);
434
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441
442
443int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
444 const char *name)
445{
446 int request_mask = ((1 << 6) - 1) & ~mask;
447 int rc;
448
449 rc = pci_request_selected_regions(pdev, request_mask, name);
450 if (rc)
451 return rc;
452
453 rc = pcim_iomap_regions(pdev, mask, name);
454 if (rc)
455 pci_release_selected_regions(pdev, request_mask);
456 return rc;
457}
458EXPORT_SYMBOL(pcim_iomap_regions_request_all);
459
460
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465
466
467void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
468{
469 void __iomem * const *iomap;
470 int i;
471
472 iomap = pcim_iomap_table(pdev);
473 if (!iomap)
474 return;
475
476 for (i = 0; i < PCIM_IOMAP_MAX; i++) {
477 if (!(mask & (1 << i)))
478 continue;
479
480 pcim_iounmap(pdev, iomap[i]);
481 pci_release_region(pdev, i);
482 }
483}
484EXPORT_SYMBOL(pcim_iounmap_regions);
485#endif
486