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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
f4a18312 | 2 | #include <linux/err.h> |
5ea81769 AV |
3 | #include <linux/pci.h> |
4 | #include <linux/io.h> | |
5a0e3ad6 | 5 | #include <linux/gfp.h> |
8bc3bcc9 | 6 | #include <linux/export.h> |
5ea81769 | 7 | |
b41e5fff | 8 | void devm_ioremap_release(struct device *dev, void *res) |
5ea81769 AV |
9 | { |
10 | iounmap(*(void __iomem **)res); | |
11 | } | |
12 | ||
13 | static int devm_ioremap_match(struct device *dev, void *res, void *match_data) | |
14 | { | |
15 | return *(void **)res == match_data; | |
16 | } | |
17 | ||
18 | /** | |
19 | * devm_ioremap - Managed ioremap() | |
20 | * @dev: Generic device to remap IO address for | |
6524754e | 21 | * @offset: Resource address to map |
5ea81769 AV |
22 | * @size: Size of map |
23 | * | |
24 | * Managed ioremap(). Map is automatically unmapped on driver detach. | |
25 | */ | |
4f452e8a | 26 | void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, |
5559b7bc | 27 | resource_size_t size) |
5ea81769 AV |
28 | { |
29 | void __iomem **ptr, *addr; | |
30 | ||
31 | ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL); | |
32 | if (!ptr) | |
33 | return NULL; | |
34 | ||
35 | addr = ioremap(offset, size); | |
36 | if (addr) { | |
37 | *ptr = addr; | |
38 | devres_add(dev, ptr); | |
39 | } else | |
40 | devres_free(ptr); | |
41 | ||
42 | return addr; | |
43 | } | |
44 | EXPORT_SYMBOL(devm_ioremap); | |
45 | ||
933d4644 AK |
46 | /** |
47 | * devm_ioremap_uc - Managed ioremap_uc() | |
48 | * @dev: Generic device to remap IO address for | |
49 | * @offset: Resource address to map | |
50 | * @size: Size of map | |
51 | * | |
52 | * Managed ioremap_uc(). Map is automatically unmapped on driver detach. | |
53 | */ | |
54 | void __iomem *devm_ioremap_uc(struct device *dev, resource_size_t offset, | |
55 | resource_size_t 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_uc(offset, size); | |
64 | if (addr) { | |
65 | *ptr = addr; | |
66 | devres_add(dev, ptr); | |
67 | } else | |
68 | devres_free(ptr); | |
69 | ||
70 | return addr; | |
71 | } | |
72 | EXPORT_SYMBOL(devm_ioremap_uc); | |
73 | ||
74 | ||
5ea81769 AV |
75 | /** |
76 | * devm_ioremap_nocache - Managed ioremap_nocache() | |
77 | * @dev: Generic device to remap IO address for | |
6524754e | 78 | * @offset: Resource address to map |
5ea81769 AV |
79 | * @size: Size of map |
80 | * | |
81 | * Managed ioremap_nocache(). Map is automatically unmapped on driver | |
82 | * detach. | |
83 | */ | |
4f452e8a | 84 | void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset, |
5559b7bc | 85 | resource_size_t size) |
5ea81769 AV |
86 | { |
87 | void __iomem **ptr, *addr; | |
88 | ||
89 | ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL); | |
90 | if (!ptr) | |
91 | return NULL; | |
92 | ||
93 | addr = ioremap_nocache(offset, size); | |
94 | if (addr) { | |
95 | *ptr = addr; | |
96 | devres_add(dev, ptr); | |
97 | } else | |
98 | devres_free(ptr); | |
99 | ||
100 | return addr; | |
101 | } | |
102 | EXPORT_SYMBOL(devm_ioremap_nocache); | |
103 | ||
34644524 AK |
104 | /** |
105 | * devm_ioremap_wc - Managed ioremap_wc() | |
106 | * @dev: Generic device to remap IO address for | |
6524754e | 107 | * @offset: Resource address to map |
34644524 AK |
108 | * @size: Size of map |
109 | * | |
110 | * Managed ioremap_wc(). Map is automatically unmapped on driver detach. | |
111 | */ | |
112 | void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset, | |
113 | resource_size_t size) | |
114 | { | |
115 | void __iomem **ptr, *addr; | |
116 | ||
117 | ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL); | |
118 | if (!ptr) | |
119 | return NULL; | |
120 | ||
121 | addr = ioremap_wc(offset, size); | |
122 | if (addr) { | |
123 | *ptr = addr; | |
124 | devres_add(dev, ptr); | |
125 | } else | |
126 | devres_free(ptr); | |
127 | ||
128 | return addr; | |
129 | } | |
130 | EXPORT_SYMBOL(devm_ioremap_wc); | |
131 | ||
5ea81769 AV |
132 | /** |
133 | * devm_iounmap - Managed iounmap() | |
134 | * @dev: Generic device to unmap for | |
135 | * @addr: Address to unmap | |
136 | * | |
137 | * Managed iounmap(). @addr must have been mapped using devm_ioremap*(). | |
138 | */ | |
139 | void devm_iounmap(struct device *dev, void __iomem *addr) | |
140 | { | |
5ea81769 | 141 | WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match, |
b104d6a5 | 142 | (__force void *)addr)); |
ae891a1b | 143 | iounmap(addr); |
5ea81769 AV |
144 | } |
145 | EXPORT_SYMBOL(devm_iounmap); | |
146 | ||
72f8c0bf | 147 | /** |
75096579 TR |
148 | * devm_ioremap_resource() - check, request region, and ioremap resource |
149 | * @dev: generic device to handle the resource for | |
72f8c0bf WS |
150 | * @res: resource to be handled |
151 | * | |
92b19ff5 DW |
152 | * Checks that a resource is a valid memory region, requests the memory |
153 | * region and ioremaps it. All operations are managed and will be undone | |
154 | * on driver detach. | |
75096579 TR |
155 | * |
156 | * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code | |
157 | * on failure. Usage example: | |
72f8c0bf WS |
158 | * |
159 | * res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
75096579 TR |
160 | * base = devm_ioremap_resource(&pdev->dev, res); |
161 | * if (IS_ERR(base)) | |
162 | * return PTR_ERR(base); | |
72f8c0bf | 163 | */ |
6b54fff8 AB |
164 | void __iomem *devm_ioremap_resource(struct device *dev, |
165 | const struct resource *res) | |
72f8c0bf WS |
166 | { |
167 | resource_size_t size; | |
168 | const char *name; | |
169 | void __iomem *dest_ptr; | |
170 | ||
171 | BUG_ON(!dev); | |
172 | ||
173 | if (!res || resource_type(res) != IORESOURCE_MEM) { | |
174 | dev_err(dev, "invalid resource\n"); | |
b104d6a5 | 175 | return IOMEM_ERR_PTR(-EINVAL); |
72f8c0bf WS |
176 | } |
177 | ||
178 | size = resource_size(res); | |
179 | name = res->name ?: dev_name(dev); | |
180 | ||
181 | if (!devm_request_mem_region(dev, res->start, size, name)) { | |
182 | dev_err(dev, "can't request region for resource %pR\n", res); | |
b104d6a5 | 183 | return IOMEM_ERR_PTR(-EBUSY); |
72f8c0bf WS |
184 | } |
185 | ||
92b19ff5 | 186 | dest_ptr = devm_ioremap(dev, res->start, size); |
72f8c0bf WS |
187 | if (!dest_ptr) { |
188 | dev_err(dev, "ioremap failed for resource %pR\n", res); | |
189 | devm_release_mem_region(dev, res->start, size); | |
b104d6a5 | 190 | dest_ptr = IOMEM_ERR_PTR(-ENOMEM); |
72f8c0bf WS |
191 | } |
192 | ||
193 | return dest_ptr; | |
194 | } | |
75096579 TR |
195 | EXPORT_SYMBOL(devm_ioremap_resource); |
196 | ||
ce816fa8 | 197 | #ifdef CONFIG_HAS_IOPORT_MAP |
5ea81769 AV |
198 | /* |
199 | * Generic iomap devres | |
200 | */ | |
201 | static void devm_ioport_map_release(struct device *dev, void *res) | |
202 | { | |
203 | ioport_unmap(*(void __iomem **)res); | |
204 | } | |
205 | ||
206 | static int devm_ioport_map_match(struct device *dev, void *res, | |
207 | void *match_data) | |
208 | { | |
209 | return *(void **)res == match_data; | |
210 | } | |
211 | ||
212 | /** | |
213 | * devm_ioport_map - Managed ioport_map() | |
214 | * @dev: Generic device to map ioport for | |
215 | * @port: Port to map | |
216 | * @nr: Number of ports to map | |
217 | * | |
218 | * Managed ioport_map(). Map is automatically unmapped on driver | |
219 | * detach. | |
220 | */ | |
5cbb00cc | 221 | void __iomem *devm_ioport_map(struct device *dev, unsigned long port, |
5ea81769 AV |
222 | unsigned int nr) |
223 | { | |
224 | void __iomem **ptr, *addr; | |
225 | ||
226 | ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL); | |
227 | if (!ptr) | |
228 | return NULL; | |
229 | ||
230 | addr = ioport_map(port, nr); | |
231 | if (addr) { | |
232 | *ptr = addr; | |
233 | devres_add(dev, ptr); | |
234 | } else | |
235 | devres_free(ptr); | |
236 | ||
237 | return addr; | |
238 | } | |
239 | EXPORT_SYMBOL(devm_ioport_map); | |
240 | ||
241 | /** | |
242 | * devm_ioport_unmap - Managed ioport_unmap() | |
243 | * @dev: Generic device to unmap for | |
244 | * @addr: Address to unmap | |
245 | * | |
246 | * Managed ioport_unmap(). @addr must have been mapped using | |
247 | * devm_ioport_map(). | |
248 | */ | |
249 | void devm_ioport_unmap(struct device *dev, void __iomem *addr) | |
250 | { | |
251 | ioport_unmap(addr); | |
252 | WARN_ON(devres_destroy(dev, devm_ioport_map_release, | |
b104d6a5 | 253 | devm_ioport_map_match, (__force void *)addr)); |
5ea81769 AV |
254 | } |
255 | EXPORT_SYMBOL(devm_ioport_unmap); | |
ce816fa8 | 256 | #endif /* CONFIG_HAS_IOPORT_MAP */ |
5ea81769 AV |
257 | |
258 | #ifdef CONFIG_PCI | |
259 | /* | |
260 | * PCI iomap devres | |
261 | */ | |
262 | #define PCIM_IOMAP_MAX PCI_ROM_RESOURCE | |
263 | ||
264 | struct pcim_iomap_devres { | |
265 | void __iomem *table[PCIM_IOMAP_MAX]; | |
266 | }; | |
267 | ||
268 | static void pcim_iomap_release(struct device *gendev, void *res) | |
269 | { | |
20af74ef | 270 | struct pci_dev *dev = to_pci_dev(gendev); |
5ea81769 AV |
271 | struct pcim_iomap_devres *this = res; |
272 | int i; | |
273 | ||
274 | for (i = 0; i < PCIM_IOMAP_MAX; i++) | |
275 | if (this->table[i]) | |
276 | pci_iounmap(dev, this->table[i]); | |
277 | } | |
278 | ||
279 | /** | |
280 | * pcim_iomap_table - access iomap allocation table | |
281 | * @pdev: PCI device to access iomap table for | |
282 | * | |
283 | * Access iomap allocation table for @dev. If iomap table doesn't | |
284 | * exist and @pdev is managed, it will be allocated. All iomaps | |
285 | * recorded in the iomap table are automatically unmapped on driver | |
286 | * detach. | |
287 | * | |
288 | * This function might sleep when the table is first allocated but can | |
289 | * be safely called without context and guaranteed to succed once | |
290 | * allocated. | |
291 | */ | |
5cbb00cc | 292 | void __iomem * const *pcim_iomap_table(struct pci_dev *pdev) |
5ea81769 AV |
293 | { |
294 | struct pcim_iomap_devres *dr, *new_dr; | |
295 | ||
296 | dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL); | |
297 | if (dr) | |
298 | return dr->table; | |
299 | ||
300 | new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL); | |
301 | if (!new_dr) | |
302 | return NULL; | |
303 | dr = devres_get(&pdev->dev, new_dr, NULL, NULL); | |
304 | return dr->table; | |
305 | } | |
306 | EXPORT_SYMBOL(pcim_iomap_table); | |
307 | ||
308 | /** | |
309 | * pcim_iomap - Managed pcim_iomap() | |
310 | * @pdev: PCI device to iomap for | |
311 | * @bar: BAR to iomap | |
312 | * @maxlen: Maximum length of iomap | |
313 | * | |
314 | * Managed pci_iomap(). Map is automatically unmapped on driver | |
315 | * detach. | |
316 | */ | |
5cbb00cc | 317 | void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen) |
5ea81769 AV |
318 | { |
319 | void __iomem **tbl; | |
320 | ||
321 | BUG_ON(bar >= PCIM_IOMAP_MAX); | |
322 | ||
323 | tbl = (void __iomem **)pcim_iomap_table(pdev); | |
324 | if (!tbl || tbl[bar]) /* duplicate mappings not allowed */ | |
325 | return NULL; | |
326 | ||
327 | tbl[bar] = pci_iomap(pdev, bar, maxlen); | |
328 | return tbl[bar]; | |
329 | } | |
330 | EXPORT_SYMBOL(pcim_iomap); | |
331 | ||
332 | /** | |
333 | * pcim_iounmap - Managed pci_iounmap() | |
334 | * @pdev: PCI device to iounmap for | |
335 | * @addr: Address to unmap | |
336 | * | |
337 | * Managed pci_iounmap(). @addr must have been mapped using pcim_iomap(). | |
338 | */ | |
339 | void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr) | |
340 | { | |
341 | void __iomem **tbl; | |
342 | int i; | |
343 | ||
344 | pci_iounmap(pdev, addr); | |
345 | ||
346 | tbl = (void __iomem **)pcim_iomap_table(pdev); | |
347 | BUG_ON(!tbl); | |
348 | ||
349 | for (i = 0; i < PCIM_IOMAP_MAX; i++) | |
350 | if (tbl[i] == addr) { | |
351 | tbl[i] = NULL; | |
352 | return; | |
353 | } | |
354 | WARN_ON(1); | |
355 | } | |
356 | EXPORT_SYMBOL(pcim_iounmap); | |
357 | ||
358 | /** | |
359 | * pcim_iomap_regions - Request and iomap PCI BARs | |
360 | * @pdev: PCI device to map IO resources for | |
361 | * @mask: Mask of BARs to request and iomap | |
362 | * @name: Name used when requesting regions | |
363 | * | |
364 | * Request and iomap regions specified by @mask. | |
365 | */ | |
fb7ebfe4 | 366 | int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name) |
5ea81769 AV |
367 | { |
368 | void __iomem * const *iomap; | |
369 | int i, rc; | |
370 | ||
371 | iomap = pcim_iomap_table(pdev); | |
372 | if (!iomap) | |
373 | return -ENOMEM; | |
374 | ||
375 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { | |
376 | unsigned long len; | |
377 | ||
378 | if (!(mask & (1 << i))) | |
379 | continue; | |
380 | ||
381 | rc = -EINVAL; | |
382 | len = pci_resource_len(pdev, i); | |
383 | if (!len) | |
384 | goto err_inval; | |
385 | ||
386 | rc = pci_request_region(pdev, i, name); | |
387 | if (rc) | |
fb4d64e7 | 388 | goto err_inval; |
5ea81769 AV |
389 | |
390 | rc = -ENOMEM; | |
391 | if (!pcim_iomap(pdev, i, 0)) | |
fb4d64e7 | 392 | goto err_region; |
5ea81769 AV |
393 | } |
394 | ||
395 | return 0; | |
396 | ||
5ea81769 AV |
397 | err_region: |
398 | pci_release_region(pdev, i); | |
399 | err_inval: | |
400 | while (--i >= 0) { | |
fb4d64e7 FD |
401 | if (!(mask & (1 << i))) |
402 | continue; | |
5ea81769 AV |
403 | pcim_iounmap(pdev, iomap[i]); |
404 | pci_release_region(pdev, i); | |
405 | } | |
406 | ||
407 | return rc; | |
408 | } | |
409 | EXPORT_SYMBOL(pcim_iomap_regions); | |
ec04b075 | 410 | |
916fbfb7 TH |
411 | /** |
412 | * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones | |
413 | * @pdev: PCI device to map IO resources for | |
414 | * @mask: Mask of BARs to iomap | |
415 | * @name: Name used when requesting regions | |
416 | * | |
417 | * Request all PCI BARs and iomap regions specified by @mask. | |
418 | */ | |
fb7ebfe4 | 419 | int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask, |
916fbfb7 TH |
420 | const char *name) |
421 | { | |
422 | int request_mask = ((1 << 6) - 1) & ~mask; | |
423 | int rc; | |
424 | ||
425 | rc = pci_request_selected_regions(pdev, request_mask, name); | |
426 | if (rc) | |
427 | return rc; | |
428 | ||
429 | rc = pcim_iomap_regions(pdev, mask, name); | |
430 | if (rc) | |
431 | pci_release_selected_regions(pdev, request_mask); | |
432 | return rc; | |
433 | } | |
434 | EXPORT_SYMBOL(pcim_iomap_regions_request_all); | |
435 | ||
ec04b075 TH |
436 | /** |
437 | * pcim_iounmap_regions - Unmap and release PCI BARs | |
438 | * @pdev: PCI device to map IO resources for | |
439 | * @mask: Mask of BARs to unmap and release | |
440 | * | |
4d45ada3 | 441 | * Unmap and release regions specified by @mask. |
ec04b075 | 442 | */ |
fb7ebfe4 | 443 | void pcim_iounmap_regions(struct pci_dev *pdev, int mask) |
ec04b075 TH |
444 | { |
445 | void __iomem * const *iomap; | |
446 | int i; | |
447 | ||
448 | iomap = pcim_iomap_table(pdev); | |
449 | if (!iomap) | |
450 | return; | |
451 | ||
1f35d04a | 452 | for (i = 0; i < PCIM_IOMAP_MAX; i++) { |
ec04b075 TH |
453 | if (!(mask & (1 << i))) |
454 | continue; | |
455 | ||
456 | pcim_iounmap(pdev, iomap[i]); | |
457 | pci_release_region(pdev, i); | |
458 | } | |
459 | } | |
460 | EXPORT_SYMBOL(pcim_iounmap_regions); | |
571806a9 | 461 | #endif /* CONFIG_PCI */ |