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);
145 #ifdef CONFIG_HAS_IOPORT_MAP
147 * Generic iomap devres
149 static void devm_ioport_map_release(struct device *dev, void *res)
151 ioport_unmap(*(void __iomem **)res);
154 static int devm_ioport_map_match(struct device *dev, void *res,
157 return *(void **)res == match_data;
161 * devm_ioport_map - Managed ioport_map()
162 * @dev: Generic device to map ioport for
164 * @nr: Number of ports to map
166 * Managed ioport_map(). Map is automatically unmapped on driver
169 void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
172 void __iomem **ptr, *addr;
174 ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
178 addr = ioport_map(port, nr);
181 devres_add(dev, ptr);
187 EXPORT_SYMBOL(devm_ioport_map);
190 * devm_ioport_unmap - Managed ioport_unmap()
191 * @dev: Generic device to unmap for
192 * @addr: Address to unmap
194 * Managed ioport_unmap(). @addr must have been mapped using
197 void devm_ioport_unmap(struct device *dev, void __iomem *addr)
200 WARN_ON(devres_destroy(dev, devm_ioport_map_release,
201 devm_ioport_map_match, (__force void *)addr));
203 EXPORT_SYMBOL(devm_ioport_unmap);
204 #endif /* CONFIG_HAS_IOPORT_MAP */
210 #define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
212 struct pcim_iomap_devres {
213 void __iomem *table[PCIM_IOMAP_MAX];
216 static void pcim_iomap_release(struct device *gendev, void *res)
218 struct pci_dev *dev = container_of(gendev, struct pci_dev, dev);
219 struct pcim_iomap_devres *this = res;
222 for (i = 0; i < PCIM_IOMAP_MAX; i++)
224 pci_iounmap(dev, this->table[i]);
228 * pcim_iomap_table - access iomap allocation table
229 * @pdev: PCI device to access iomap table for
231 * Access iomap allocation table for @dev. If iomap table doesn't
232 * exist and @pdev is managed, it will be allocated. All iomaps
233 * recorded in the iomap table are automatically unmapped on driver
236 * This function might sleep when the table is first allocated but can
237 * be safely called without context and guaranteed to succed once
240 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev)
242 struct pcim_iomap_devres *dr, *new_dr;
244 dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
248 new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
251 dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
254 EXPORT_SYMBOL(pcim_iomap_table);
257 * pcim_iomap - Managed pcim_iomap()
258 * @pdev: PCI device to iomap for
260 * @maxlen: Maximum length of iomap
262 * Managed pci_iomap(). Map is automatically unmapped on driver
265 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
269 BUG_ON(bar >= PCIM_IOMAP_MAX);
271 tbl = (void __iomem **)pcim_iomap_table(pdev);
272 if (!tbl || tbl[bar]) /* duplicate mappings not allowed */
275 tbl[bar] = pci_iomap(pdev, bar, maxlen);
278 EXPORT_SYMBOL(pcim_iomap);
281 * pcim_iounmap - Managed pci_iounmap()
282 * @pdev: PCI device to iounmap for
283 * @addr: Address to unmap
285 * Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
287 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
292 pci_iounmap(pdev, addr);
294 tbl = (void __iomem **)pcim_iomap_table(pdev);
297 for (i = 0; i < PCIM_IOMAP_MAX; i++)
298 if (tbl[i] == addr) {
304 EXPORT_SYMBOL(pcim_iounmap);
307 * pcim_iomap_regions - Request and iomap PCI BARs
308 * @pdev: PCI device to map IO resources for
309 * @mask: Mask of BARs to request and iomap
310 * @name: Name used when requesting regions
312 * Request and iomap regions specified by @mask.
314 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name)
316 void __iomem * const *iomap;
319 iomap = pcim_iomap_table(pdev);
323 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
326 if (!(mask & (1 << i)))
330 len = pci_resource_len(pdev, i);
334 rc = pci_request_region(pdev, i, name);
339 if (!pcim_iomap(pdev, i, 0))
346 pci_release_region(pdev, i);
349 if (!(mask & (1 << i)))
351 pcim_iounmap(pdev, iomap[i]);
352 pci_release_region(pdev, i);
357 EXPORT_SYMBOL(pcim_iomap_regions);
360 * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
361 * @pdev: PCI device to map IO resources for
362 * @mask: Mask of BARs to iomap
363 * @name: Name used when requesting regions
365 * Request all PCI BARs and iomap regions specified by @mask.
367 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
370 int request_mask = ((1 << 6) - 1) & ~mask;
373 rc = pci_request_selected_regions(pdev, request_mask, name);
377 rc = pcim_iomap_regions(pdev, mask, name);
379 pci_release_selected_regions(pdev, request_mask);
382 EXPORT_SYMBOL(pcim_iomap_regions_request_all);
385 * pcim_iounmap_regions - Unmap and release PCI BARs
386 * @pdev: PCI device to map IO resources for
387 * @mask: Mask of BARs to unmap and release
389 * Unmap and release regions specified by @mask.
391 void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
393 void __iomem * const *iomap;
396 iomap = pcim_iomap_table(pdev);
400 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
401 if (!(mask & (1 << i)))
404 pcim_iounmap(pdev, iomap[i]);
405 pci_release_region(pdev, i);
408 EXPORT_SYMBOL(pcim_iounmap_regions);
409 #endif /* CONFIG_PCI */