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);
70
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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
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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
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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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132
133
134void __iomem *devm_ioremap_resource(struct device *dev,
135 const struct resource *res)
136{
137 resource_size_t size;
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
149 if (!devm_request_mem_region(dev, res->start, size, dev_name(dev))) {
150 dev_err(dev, "can't request region for resource %pR\n", res);
151 return IOMEM_ERR_PTR(-EBUSY);
152 }
153
154 dest_ptr = devm_ioremap(dev, res->start, size);
155 if (!dest_ptr) {
156 dev_err(dev, "ioremap failed for resource %pR\n", res);
157 devm_release_mem_region(dev, res->start, size);
158 dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
159 }
160
161 return dest_ptr;
162}
163EXPORT_SYMBOL(devm_ioremap_resource);
164
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186
187void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index,
188 resource_size_t *size)
189{
190 struct resource res;
191
192 if (of_address_to_resource(node, index, &res))
193 return IOMEM_ERR_PTR(-EINVAL);
194 if (size)
195 *size = resource_size(&res);
196 return devm_ioremap_resource(dev, &res);
197}
198EXPORT_SYMBOL(devm_of_iomap);
199
200#ifdef CONFIG_HAS_IOPORT_MAP
201
202
203
204static void devm_ioport_map_release(struct device *dev, void *res)
205{
206 ioport_unmap(*(void __iomem **)res);
207}
208
209static int devm_ioport_map_match(struct device *dev, void *res,
210 void *match_data)
211{
212 return *(void **)res == match_data;
213}
214
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219
220
221
222
223
224void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
225 unsigned int nr)
226{
227 void __iomem **ptr, *addr;
228
229 ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
230 if (!ptr)
231 return NULL;
232
233 addr = ioport_map(port, nr);
234 if (addr) {
235 *ptr = addr;
236 devres_add(dev, ptr);
237 } else
238 devres_free(ptr);
239
240 return addr;
241}
242EXPORT_SYMBOL(devm_ioport_map);
243
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250
251
252void devm_ioport_unmap(struct device *dev, void __iomem *addr)
253{
254 ioport_unmap(addr);
255 WARN_ON(devres_destroy(dev, devm_ioport_map_release,
256 devm_ioport_map_match, (__force void *)addr));
257}
258EXPORT_SYMBOL(devm_ioport_unmap);
259#endif
260
261#ifdef CONFIG_PCI
262
263
264
265#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
266
267struct pcim_iomap_devres {
268 void __iomem *table[PCIM_IOMAP_MAX];
269};
270
271static void pcim_iomap_release(struct device *gendev, void *res)
272{
273 struct pci_dev *dev = to_pci_dev(gendev);
274 struct pcim_iomap_devres *this = res;
275 int i;
276
277 for (i = 0; i < PCIM_IOMAP_MAX; i++)
278 if (this->table[i])
279 pci_iounmap(dev, this->table[i]);
280}
281
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293
294
295void __iomem * const *pcim_iomap_table(struct pci_dev *pdev)
296{
297 struct pcim_iomap_devres *dr, *new_dr;
298
299 dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
300 if (dr)
301 return dr->table;
302
303 new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
304 if (!new_dr)
305 return NULL;
306 dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
307 return dr->table;
308}
309EXPORT_SYMBOL(pcim_iomap_table);
310
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316
317
318
319
320void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
321{
322 void __iomem **tbl;
323
324 BUG_ON(bar >= PCIM_IOMAP_MAX);
325
326 tbl = (void __iomem **)pcim_iomap_table(pdev);
327 if (!tbl || tbl[bar])
328 return NULL;
329
330 tbl[bar] = pci_iomap(pdev, bar, maxlen);
331 return tbl[bar];
332}
333EXPORT_SYMBOL(pcim_iomap);
334
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339
340
341
342void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
343{
344 void __iomem **tbl;
345 int i;
346
347 pci_iounmap(pdev, addr);
348
349 tbl = (void __iomem **)pcim_iomap_table(pdev);
350 BUG_ON(!tbl);
351
352 for (i = 0; i < PCIM_IOMAP_MAX; i++)
353 if (tbl[i] == addr) {
354 tbl[i] = NULL;
355 return;
356 }
357 WARN_ON(1);
358}
359EXPORT_SYMBOL(pcim_iounmap);
360
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367
368
369int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name)
370{
371 void __iomem * const *iomap;
372 int i, rc;
373
374 iomap = pcim_iomap_table(pdev);
375 if (!iomap)
376 return -ENOMEM;
377
378 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
379 unsigned long len;
380
381 if (!(mask & (1 << i)))
382 continue;
383
384 rc = -EINVAL;
385 len = pci_resource_len(pdev, i);
386 if (!len)
387 goto err_inval;
388
389 rc = pci_request_region(pdev, i, name);
390 if (rc)
391 goto err_inval;
392
393 rc = -ENOMEM;
394 if (!pcim_iomap(pdev, i, 0))
395 goto err_region;
396 }
397
398 return 0;
399
400 err_region:
401 pci_release_region(pdev, i);
402 err_inval:
403 while (--i >= 0) {
404 if (!(mask & (1 << i)))
405 continue;
406 pcim_iounmap(pdev, iomap[i]);
407 pci_release_region(pdev, i);
408 }
409
410 return rc;
411}
412EXPORT_SYMBOL(pcim_iomap_regions);
413
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420
421
422int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
423 const char *name)
424{
425 int request_mask = ((1 << 6) - 1) & ~mask;
426 int rc;
427
428 rc = pci_request_selected_regions(pdev, request_mask, name);
429 if (rc)
430 return rc;
431
432 rc = pcim_iomap_regions(pdev, mask, name);
433 if (rc)
434 pci_release_selected_regions(pdev, request_mask);
435 return rc;
436}
437EXPORT_SYMBOL(pcim_iomap_regions_request_all);
438
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444
445
446void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
447{
448 void __iomem * const *iomap;
449 int i;
450
451 iomap = pcim_iomap_table(pdev);
452 if (!iomap)
453 return;
454
455 for (i = 0; i < PCIM_IOMAP_MAX; i++) {
456 if (!(mask & (1 << i)))
457 continue;
458
459 pcim_iounmap(pdev, iomap[i]);
460 pci_release_region(pdev, i);
461 }
462}
463EXPORT_SYMBOL(pcim_iounmap_regions);
464#endif
465