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_wc - Managed ioremap_wc()
76 * @dev: Generic device to remap IO address for
77 * @offset: BUS offset to map
80 * Managed ioremap_wc(). Map is automatically unmapped on driver detach.
82 void __iomem *devm_ioremap_wc(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_wc(offset, size);
100 EXPORT_SYMBOL(devm_ioremap_wc);
103 * devm_iounmap - Managed iounmap()
104 * @dev: Generic device to unmap for
105 * @addr: Address to unmap
107 * Managed iounmap(). @addr must have been mapped using devm_ioremap*().
109 void devm_iounmap(struct device *dev, void __iomem *addr)
111 WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
112 (__force void *)addr));
115 EXPORT_SYMBOL(devm_iounmap);
118 * devm_ioremap_resource() - check, request region, and ioremap resource
119 * @dev: generic device to handle the resource for
120 * @res: resource to be handled
122 * Checks that a resource is a valid memory region, requests the memory
123 * region and ioremaps it. All operations are managed and will be undone
126 * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
127 * on failure. Usage example:
129 * res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
130 * base = devm_ioremap_resource(&pdev->dev, res);
132 * return PTR_ERR(base);
134 void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res)
136 resource_size_t size;
138 void __iomem *dest_ptr;
142 if (!res || resource_type(res) != IORESOURCE_MEM) {
143 dev_err(dev, "invalid resource\n");
144 return IOMEM_ERR_PTR(-EINVAL);
147 size = resource_size(res);
148 name = res->name ?: dev_name(dev);
150 if (!devm_request_mem_region(dev, res->start, size, name)) {
151 dev_err(dev, "can't request region for resource %pR\n", res);
152 return IOMEM_ERR_PTR(-EBUSY);
155 dest_ptr = devm_ioremap(dev, res->start, size);
157 dev_err(dev, "ioremap failed for resource %pR\n", res);
158 devm_release_mem_region(dev, res->start, size);
159 dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
164 EXPORT_SYMBOL(devm_ioremap_resource);
166 #ifdef CONFIG_HAS_IOPORT_MAP
168 * Generic iomap devres
170 static void devm_ioport_map_release(struct device *dev, void *res)
172 ioport_unmap(*(void __iomem **)res);
175 static int devm_ioport_map_match(struct device *dev, void *res,
178 return *(void **)res == match_data;
182 * devm_ioport_map - Managed ioport_map()
183 * @dev: Generic device to map ioport for
185 * @nr: Number of ports to map
187 * Managed ioport_map(). Map is automatically unmapped on driver
190 void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
193 void __iomem **ptr, *addr;
195 ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
199 addr = ioport_map(port, nr);
202 devres_add(dev, ptr);
208 EXPORT_SYMBOL(devm_ioport_map);
211 * devm_ioport_unmap - Managed ioport_unmap()
212 * @dev: Generic device to unmap for
213 * @addr: Address to unmap
215 * Managed ioport_unmap(). @addr must have been mapped using
218 void devm_ioport_unmap(struct device *dev, void __iomem *addr)
221 WARN_ON(devres_destroy(dev, devm_ioport_map_release,
222 devm_ioport_map_match, (__force void *)addr));
224 EXPORT_SYMBOL(devm_ioport_unmap);
225 #endif /* CONFIG_HAS_IOPORT_MAP */
231 #define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
233 struct pcim_iomap_devres {
234 void __iomem *table[PCIM_IOMAP_MAX];
237 static void pcim_iomap_release(struct device *gendev, void *res)
239 struct pci_dev *dev = container_of(gendev, struct pci_dev, dev);
240 struct pcim_iomap_devres *this = res;
243 for (i = 0; i < PCIM_IOMAP_MAX; i++)
245 pci_iounmap(dev, this->table[i]);
249 * pcim_iomap_table - access iomap allocation table
250 * @pdev: PCI device to access iomap table for
252 * Access iomap allocation table for @dev. If iomap table doesn't
253 * exist and @pdev is managed, it will be allocated. All iomaps
254 * recorded in the iomap table are automatically unmapped on driver
257 * This function might sleep when the table is first allocated but can
258 * be safely called without context and guaranteed to succed once
261 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev)
263 struct pcim_iomap_devres *dr, *new_dr;
265 dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
269 new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
272 dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
275 EXPORT_SYMBOL(pcim_iomap_table);
278 * pcim_iomap - Managed pcim_iomap()
279 * @pdev: PCI device to iomap for
281 * @maxlen: Maximum length of iomap
283 * Managed pci_iomap(). Map is automatically unmapped on driver
286 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
290 BUG_ON(bar >= PCIM_IOMAP_MAX);
292 tbl = (void __iomem **)pcim_iomap_table(pdev);
293 if (!tbl || tbl[bar]) /* duplicate mappings not allowed */
296 tbl[bar] = pci_iomap(pdev, bar, maxlen);
299 EXPORT_SYMBOL(pcim_iomap);
302 * pcim_iounmap - Managed pci_iounmap()
303 * @pdev: PCI device to iounmap for
304 * @addr: Address to unmap
306 * Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
308 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
313 pci_iounmap(pdev, addr);
315 tbl = (void __iomem **)pcim_iomap_table(pdev);
318 for (i = 0; i < PCIM_IOMAP_MAX; i++)
319 if (tbl[i] == addr) {
325 EXPORT_SYMBOL(pcim_iounmap);
328 * pcim_iomap_regions - Request and iomap PCI BARs
329 * @pdev: PCI device to map IO resources for
330 * @mask: Mask of BARs to request and iomap
331 * @name: Name used when requesting regions
333 * Request and iomap regions specified by @mask.
335 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name)
337 void __iomem * const *iomap;
340 iomap = pcim_iomap_table(pdev);
344 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
347 if (!(mask & (1 << i)))
351 len = pci_resource_len(pdev, i);
355 rc = pci_request_region(pdev, i, name);
360 if (!pcim_iomap(pdev, i, 0))
367 pci_release_region(pdev, i);
370 if (!(mask & (1 << i)))
372 pcim_iounmap(pdev, iomap[i]);
373 pci_release_region(pdev, i);
378 EXPORT_SYMBOL(pcim_iomap_regions);
381 * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
382 * @pdev: PCI device to map IO resources for
383 * @mask: Mask of BARs to iomap
384 * @name: Name used when requesting regions
386 * Request all PCI BARs and iomap regions specified by @mask.
388 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
391 int request_mask = ((1 << 6) - 1) & ~mask;
394 rc = pci_request_selected_regions(pdev, request_mask, name);
398 rc = pcim_iomap_regions(pdev, mask, name);
400 pci_release_selected_regions(pdev, request_mask);
403 EXPORT_SYMBOL(pcim_iomap_regions_request_all);
406 * pcim_iounmap_regions - Unmap and release PCI BARs
407 * @pdev: PCI device to map IO resources for
408 * @mask: Mask of BARs to unmap and release
410 * Unmap and release regions specified by @mask.
412 void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
414 void __iomem * const *iomap;
417 iomap = pcim_iomap_table(pdev);
421 for (i = 0; i < PCIM_IOMAP_MAX; i++) {
422 if (!(mask & (1 << i)))
425 pcim_iounmap(pdev, iomap[i]);
426 pci_release_region(pdev, i);
429 EXPORT_SYMBOL(pcim_iounmap_regions);
430 #endif /* CONFIG_PCI */