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_iounmap - Managed iounmap()
76 * @dev: Generic device to unmap for
77 * @addr: Address to unmap
79 * Managed iounmap(). @addr must have been mapped using devm_ioremap*().
81 void devm_iounmap(struct device *dev, void __iomem *addr)
83 WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
84 (__force void *)addr));
87 EXPORT_SYMBOL(devm_iounmap);
89 #define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err)
92 * devm_ioremap_resource() - check, request region, and ioremap resource
93 * @dev: generic device to handle the resource for
94 * @res: resource to be handled
96 * Checks that a resource is a valid memory region, requests the memory region
97 * and ioremaps it either as cacheable or as non-cacheable memory depending on
98 * the resource's flags. All operations are managed and will be undone on
101 * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
102 * on failure. Usage example:
104 * res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
105 * base = devm_ioremap_resource(&pdev->dev, res);
107 * return PTR_ERR(base);
109 void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res)
111 resource_size_t size;
113 void __iomem *dest_ptr;
117 if (!res || resource_type(res) != IORESOURCE_MEM) {
118 dev_err(dev, "invalid resource\n");
119 return IOMEM_ERR_PTR(-EINVAL);
122 size = resource_size(res);
123 name = res->name ?: dev_name(dev);
125 if (!devm_request_mem_region(dev, res->start, size, name)) {
126 dev_err(dev, "can't request region for resource %pR\n", res);
127 return IOMEM_ERR_PTR(-EBUSY);
130 if (res->flags & IORESOURCE_CACHEABLE)
131 dest_ptr = devm_ioremap(dev, res->start, size);
133 dest_ptr = devm_ioremap_nocache(dev, res->start, size);
136 dev_err(dev, "ioremap failed for resource %pR\n", res);
137 devm_release_mem_region(dev, res->start, size);
138 dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
143 EXPORT_SYMBOL(devm_ioremap_resource);
146 * devm_request_and_ioremap() - Check, request region, and ioremap resource
147 * @dev: Generic device to handle the resource for
148 * @res: resource to be handled
150 * Takes all necessary steps to ioremap a mem resource. Uses managed device, so
151 * everything is undone on driver detach. Checks arguments, so you can feed
152 * it the result from e.g. platform_get_resource() directly. Returns the
153 * remapped pointer or NULL on error. Usage example:
155 * res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
156 * base = devm_request_and_ioremap(&pdev->dev, res);
158 * return -EADDRNOTAVAIL;
160 void __iomem *devm_request_and_ioremap(struct device *device,
161 struct resource *res)
163 void __iomem *dest_ptr;
165 dest_ptr = devm_ioremap_resource(device, res);
166 if (IS_ERR(dest_ptr))
171 EXPORT_SYMBOL(devm_request_and_ioremap);
173 #ifdef CONFIG_HAS_IOPORT_MAP
175 * Generic iomap devres
177 static void devm_ioport_map_release(struct device *dev, void *res)
179 ioport_unmap(*(void __iomem **)res);
182 static int devm_ioport_map_match(struct device *dev, void *res,
185 return *(void **)res == match_data;
189 * devm_ioport_map - Managed ioport_map()
190 * @dev: Generic device to map ioport for
192 * @nr: Number of ports to map
194 * Managed ioport_map(). Map is automatically unmapped on driver
197 void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
200 void __iomem **ptr, *addr;
202 ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
206 addr = ioport_map(port, nr);
209 devres_add(dev, ptr);
215 EXPORT_SYMBOL(devm_ioport_map);
218 * devm_ioport_unmap - Managed ioport_unmap()
219 * @dev: Generic device to unmap for
220 * @addr: Address to unmap
222 * Managed ioport_unmap(). @addr must have been mapped using
225 void devm_ioport_unmap(struct device *dev, void __iomem *addr)
228 WARN_ON(devres_destroy(dev, devm_ioport_map_release,
229 devm_ioport_map_match, (__force void *)addr));
231 EXPORT_SYMBOL(devm_ioport_unmap);
232 #endif /* CONFIG_HAS_IOPORT_MAP */
238 #define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
240 struct pcim_iomap_devres {
241 void __iomem *table[PCIM_IOMAP_MAX];
244 static void pcim_iomap_release(struct device *gendev, void *res)
246 struct pci_dev *dev = container_of(gendev, struct pci_dev, dev);
247 struct pcim_iomap_devres *this = res;
250 for (i = 0; i < PCIM_IOMAP_MAX; i++)
252 pci_iounmap(dev, this->table[i]);
256 * pcim_iomap_table - access iomap allocation table
257 * @pdev: PCI device to access iomap table for
259 * Access iomap allocation table for @dev. If iomap table doesn't
260 * exist and @pdev is managed, it will be allocated. All iomaps
261 * recorded in the iomap table are automatically unmapped on driver
264 * This function might sleep when the table is first allocated but can
265 * be safely called without context and guaranteed to succed once
268 void __iomem * const * pcim_iomap_table(struct pci_dev *pdev)
270 struct pcim_iomap_devres *dr, *new_dr;
272 dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
276 new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
279 dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
282 EXPORT_SYMBOL(pcim_iomap_table);
285 * pcim_iomap - Managed pcim_iomap()
286 * @pdev: PCI device to iomap for
288 * @maxlen: Maximum length of iomap
290 * Managed pci_iomap(). Map is automatically unmapped on driver
293 void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
297 BUG_ON(bar >= PCIM_IOMAP_MAX);
299 tbl = (void __iomem **)pcim_iomap_table(pdev);
300 if (!tbl || tbl[bar]) /* duplicate mappings not allowed */
303 tbl[bar] = pci_iomap(pdev, bar, maxlen);
306 EXPORT_SYMBOL(pcim_iomap);
309 * pcim_iounmap - Managed pci_iounmap()
310 * @pdev: PCI device to iounmap for
311 * @addr: Address to unmap
313 * Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
315 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
320 pci_iounmap(pdev, addr);
322 tbl = (void __iomem **)pcim_iomap_table(pdev);
325 for (i = 0; i < PCIM_IOMAP_MAX; i++)
326 if (tbl[i] == addr) {
332 EXPORT_SYMBOL(pcim_iounmap);
335 * pcim_iomap_regions - Request and iomap PCI BARs
336 * @pdev: PCI device to map IO resources for
337 * @mask: Mask of BARs to request and iomap
338 * @name: Name used when requesting regions
340 * Request and iomap regions specified by @mask.
342 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name)
344 void __iomem * const *iomap;
347 iomap = pcim_iomap_table(pdev);
351 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
354 if (!(mask & (1 << i)))
358 len = pci_resource_len(pdev, i);
362 rc = pci_request_region(pdev, i, name);
367 if (!pcim_iomap(pdev, i, 0))
374 pci_release_region(pdev, i);
377 if (!(mask & (1 << i)))
379 pcim_iounmap(pdev, iomap[i]);
380 pci_release_region(pdev, i);
385 EXPORT_SYMBOL(pcim_iomap_regions);
388 * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
389 * @pdev: PCI device to map IO resources for
390 * @mask: Mask of BARs to iomap
391 * @name: Name used when requesting regions
393 * Request all PCI BARs and iomap regions specified by @mask.
395 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
398 int request_mask = ((1 << 6) - 1) & ~mask;
401 rc = pci_request_selected_regions(pdev, request_mask, name);
405 rc = pcim_iomap_regions(pdev, mask, name);
407 pci_release_selected_regions(pdev, request_mask);
410 EXPORT_SYMBOL(pcim_iomap_regions_request_all);
413 * pcim_iounmap_regions - Unmap and release PCI BARs
414 * @pdev: PCI device to map IO resources for
415 * @mask: Mask of BARs to unmap and release
417 * Unmap and release regions specified by @mask.
419 void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
421 void __iomem * const *iomap;
424 iomap = pcim_iomap_table(pdev);
428 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
429 if (!(mask & (1 << i)))
432 pcim_iounmap(pdev, iomap[i]);
433 pci_release_region(pdev, i);
436 EXPORT_SYMBOL(pcim_iounmap_regions);
437 #endif /* CONFIG_PCI */