5 #include <linux/export.h>
7 void devm_ioremap_release(struct device *dev, void *res)
9 iounmap(*(void __iomem **)res);
12 static int devm_ioremap_match(struct device *dev, void *res, void *match_data)
14 return *(void **)res == match_data;
18 * devm_ioremap - Managed ioremap()
19 * @dev: Generic device to remap IO address for
20 * @offset: BUS offset to map
23 * Managed ioremap(). Map is automatically unmapped on driver detach.
25 void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
28 void __iomem **ptr, *addr;
30 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
34 addr = ioremap(offset, size);
43 EXPORT_SYMBOL(devm_ioremap);
46 * devm_ioremap_nocache - Managed ioremap_nocache()
47 * @dev: Generic device to remap IO address for
48 * @offset: BUS offset to map
51 * Managed ioremap_nocache(). Map is automatically unmapped on driver
54 void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
57 void __iomem **ptr, *addr;
59 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
63 addr = ioremap_nocache(offset, size);
72 EXPORT_SYMBOL(devm_ioremap_nocache);
75 * devm_ioremap_exec - Managed ioremap_exec()
76 * @dev: Generic device to remap IO address for
77 * @offset: BUS offset to map
80 * Managed ioremap_exec(). Map is automatically unmapped on driver detach.
82 void __iomem *devm_ioremap_exec(struct device *dev, resource_size_t offset,
85 void __iomem **ptr, *addr;
87 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
91 addr = ioremap_exec(offset, size);
100 EXPORT_SYMBOL(devm_ioremap_exec);
103 * devm_ioremap_exec_nocache - Managed ioremap_exec_nocache()
104 * @dev: Generic device to remap IO address for
105 * @offset: BUS offset to map
108 * Managed ioremap_exec_nocache(). Map is automatically unmapped on driver
111 void __iomem *devm_ioremap_exec_nocache(struct device *dev,
112 resource_size_t offset,
115 void __iomem **ptr, *addr;
117 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
121 addr = ioremap_exec_nocache(offset, size);
124 devres_add(dev, ptr);
130 EXPORT_SYMBOL(devm_ioremap_exec_nocache);
133 * devm_iounmap - Managed iounmap()
134 * @dev: Generic device to unmap for
135 * @addr: Address to unmap
137 * Managed iounmap(). @addr must have been mapped using devm_ioremap*().
139 void devm_iounmap(struct device *dev, void __iomem *addr)
141 WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
145 EXPORT_SYMBOL(devm_iounmap);
148 * devm_ioremap_resource() - check, request region, and ioremap resource
149 * @dev: generic device to handle the resource for
150 * @res: resource to be handled
152 * Checks that a resource is a valid memory region, requests the memory region
153 * and ioremaps it either as cacheable or as non-cacheable memory depending on
154 * the resource's flags. All operations are managed and will be undone on
157 * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
158 * on failure. Usage example:
160 * res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
161 * base = devm_ioremap_resource(&pdev->dev, res);
163 * return PTR_ERR(base);
165 void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res)
167 resource_size_t size;
169 void __iomem *dest_ptr;
173 if (!res || resource_type(res) != IORESOURCE_MEM) {
174 dev_err(dev, "invalid resource\n");
175 return ERR_PTR(-EINVAL);
178 size = resource_size(res);
179 name = res->name ?: dev_name(dev);
181 if (!devm_request_mem_region(dev, res->start, size, name)) {
182 dev_err(dev, "can't request region for resource %pR\n", res);
183 return ERR_PTR(-EBUSY);
186 if (res->flags & IORESOURCE_CACHEABLE)
187 dest_ptr = devm_ioremap(dev, res->start, size);
189 dest_ptr = devm_ioremap_nocache(dev, res->start, size);
192 dev_err(dev, "ioremap failed for resource %pR\n", res);
193 devm_release_mem_region(dev, res->start, size);
194 dest_ptr = ERR_PTR(-ENOMEM);
199 EXPORT_SYMBOL(devm_ioremap_resource);
201 void __iomem *devm_ioremap_exec_resource(struct device *dev,
202 struct resource *res)
204 resource_size_t size;
206 void __iomem *dest_ptr;
210 if (!res || resource_type(res) != IORESOURCE_MEM) {
211 dev_err(dev, "invalid resource\n");
212 return ERR_PTR(-EINVAL);
215 size = resource_size(res);
216 name = res->name ?: dev_name(dev);
218 if (!devm_request_mem_region(dev, res->start, size, name)) {
219 dev_err(dev, "can't request region for resource %pR\n", res);
220 return ERR_PTR(-EBUSY);
223 if (res->flags & IORESOURCE_CACHEABLE)
224 dest_ptr = devm_ioremap_exec(dev, res->start, size);
226 dest_ptr = devm_ioremap_exec_nocache(dev, res->start, size);
229 dev_err(dev, "ioremap failed for resource %pR\n", res);
230 devm_release_mem_region(dev, res->start, size);
231 dest_ptr = ERR_PTR(-ENOMEM);
236 EXPORT_SYMBOL(devm_ioremap_exec_resource);
239 * devm_request_and_ioremap() - Check, request region, and ioremap resource
240 * @dev: Generic device to handle the resource for
241 * @res: resource to be handled
243 * Takes all necessary steps to ioremap a mem resource. Uses managed device, so
244 * everything is undone on driver detach. Checks arguments, so you can feed
245 * it the result from e.g. platform_get_resource() directly. Returns the
246 * remapped pointer or NULL on error. Usage example:
248 * res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
249 * base = devm_request_and_ioremap(&pdev->dev, res);
251 * return -EADDRNOTAVAIL;
253 void __iomem *devm_request_and_ioremap(struct device *device,
254 struct resource *res)
256 void __iomem *dest_ptr;
258 dest_ptr = devm_ioremap_resource(device, res);
259 if (IS_ERR(dest_ptr))
264 EXPORT_SYMBOL(devm_request_and_ioremap);
267 * devm_request_and_ioremap_exec() - Check, request region, and ioremap resource
268 * @dev: Generic device to handle the resource for
269 * @res: resource to be handled
271 * Takes all necessary steps to ioremap a mem resource. Uses managed device, so
272 * everything is undone on driver detach. Checks arguments, so you can feed
273 * it the result from e.g. platform_get_resource() directly. Returns the
274 * remapped pointer or NULL on error. Usage example:
276 * res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
277 * base = devm_request_and_ioremap_exec(&pdev->dev, res);
279 * return -EADDRNOTAVAIL;
281 void __iomem *devm_request_and_ioremap_exec(struct device *device,
282 struct resource *res)
284 void __iomem *dest_ptr;
286 dest_ptr = devm_ioremap_exec_resource(device, res);
287 if (IS_ERR(dest_ptr))
292 EXPORT_SYMBOL(devm_request_and_ioremap_exec);
294 #ifdef CONFIG_HAS_IOPORT
296 * Generic iomap devres
298 static void devm_ioport_map_release(struct device *dev, void *res)
300 ioport_unmap(*(void __iomem **)res);
303 static int devm_ioport_map_match(struct device *dev, void *res,
306 return *(void **)res == match_data;
310 * devm_ioport_map - Managed ioport_map()
311 * @dev: Generic device to map ioport for
313 * @nr: Number of ports to map
315 * Managed ioport_map(). Map is automatically unmapped on driver
318 void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
321 void __iomem **ptr, *addr;
323 ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
327 addr = ioport_map(port, nr);
330 devres_add(dev, ptr);
336 EXPORT_SYMBOL(devm_ioport_map);
339 * devm_ioport_unmap - Managed ioport_unmap()
340 * @dev: Generic device to unmap for
341 * @addr: Address to unmap
343 * Managed ioport_unmap(). @addr must have been mapped using
346 void devm_ioport_unmap(struct device *dev, void __iomem *addr)
349 WARN_ON(devres_destroy(dev, devm_ioport_map_release,
350 devm_ioport_map_match, (void *)addr));
352 EXPORT_SYMBOL(devm_ioport_unmap);
353 #endif /* CONFIG_HAS_IOPORT */
359 #define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
361 struct pcim_iomap_devres {
362 void __iomem *table[PCIM_IOMAP_MAX];
365 static void pcim_iomap_release(struct device *gendev, void *res)
367 struct pci_dev *dev = container_of(gendev, struct pci_dev, dev);
368 struct pcim_iomap_devres *this = res;
371 for (i = 0; i < PCIM_IOMAP_MAX; i++)
373 pci_iounmap(dev, this->table[i]);
377 * pcim_iomap_table - access iomap allocation table
378 * @pdev: PCI device to access iomap table for
380 * Access iomap allocation table for @dev. If iomap table doesn't
381 * exist and @pdev is managed, it will be allocated. All iomaps
382 * recorded in the iomap table are automatically unmapped on driver
385 * This function might sleep when the table is first allocated but can
386 * be safely called without context and guaranteed to succed once
389 void __iomem * const * pcim_iomap_table(struct pci_dev *pdev)
391 struct pcim_iomap_devres *dr, *new_dr;
393 dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
397 new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
400 dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
403 EXPORT_SYMBOL(pcim_iomap_table);
406 * pcim_iomap - Managed pcim_iomap()
407 * @pdev: PCI device to iomap for
409 * @maxlen: Maximum length of iomap
411 * Managed pci_iomap(). Map is automatically unmapped on driver
414 void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
418 BUG_ON(bar >= PCIM_IOMAP_MAX);
420 tbl = (void __iomem **)pcim_iomap_table(pdev);
421 if (!tbl || tbl[bar]) /* duplicate mappings not allowed */
424 tbl[bar] = pci_iomap(pdev, bar, maxlen);
427 EXPORT_SYMBOL(pcim_iomap);
430 * pcim_iounmap - Managed pci_iounmap()
431 * @pdev: PCI device to iounmap for
432 * @addr: Address to unmap
434 * Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
436 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
441 pci_iounmap(pdev, addr);
443 tbl = (void __iomem **)pcim_iomap_table(pdev);
446 for (i = 0; i < PCIM_IOMAP_MAX; i++)
447 if (tbl[i] == addr) {
453 EXPORT_SYMBOL(pcim_iounmap);
456 * pcim_iomap_regions - Request and iomap PCI BARs
457 * @pdev: PCI device to map IO resources for
458 * @mask: Mask of BARs to request and iomap
459 * @name: Name used when requesting regions
461 * Request and iomap regions specified by @mask.
463 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name)
465 void __iomem * const *iomap;
468 iomap = pcim_iomap_table(pdev);
472 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
475 if (!(mask & (1 << i)))
479 len = pci_resource_len(pdev, i);
483 rc = pci_request_region(pdev, i, name);
488 if (!pcim_iomap(pdev, i, 0))
495 pci_release_region(pdev, i);
498 if (!(mask & (1 << i)))
500 pcim_iounmap(pdev, iomap[i]);
501 pci_release_region(pdev, i);
506 EXPORT_SYMBOL(pcim_iomap_regions);
509 * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
510 * @pdev: PCI device to map IO resources for
511 * @mask: Mask of BARs to iomap
512 * @name: Name used when requesting regions
514 * Request all PCI BARs and iomap regions specified by @mask.
516 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
519 int request_mask = ((1 << 6) - 1) & ~mask;
522 rc = pci_request_selected_regions(pdev, request_mask, name);
526 rc = pcim_iomap_regions(pdev, mask, name);
528 pci_release_selected_regions(pdev, request_mask);
531 EXPORT_SYMBOL(pcim_iomap_regions_request_all);
534 * pcim_iounmap_regions - Unmap and release PCI BARs
535 * @pdev: PCI device to map IO resources for
536 * @mask: Mask of BARs to unmap and release
538 * Unmap and release regions specified by @mask.
540 void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
542 void __iomem * const *iomap;
545 iomap = pcim_iomap_table(pdev);
549 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
550 if (!(mask & (1 << i)))
553 pcim_iounmap(pdev, iomap[i]);
554 pci_release_region(pdev, i);
557 EXPORT_SYMBOL(pcim_iounmap_regions);
558 #endif /* CONFIG_PCI */