4 #include <linux/export.h>
6 void devm_ioremap_release(struct device *dev, void *res)
8 iounmap(*(void __iomem **)res);
11 static int devm_ioremap_match(struct device *dev, void *res, void *match_data)
13 return *(void **)res == match_data;
17 * devm_ioremap - Managed ioremap()
18 * @dev: Generic device to remap IO address for
19 * @offset: BUS offset to map
22 * Managed ioremap(). Map is automatically unmapped on driver detach.
24 void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
27 void __iomem **ptr, *addr;
29 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
33 addr = ioremap(offset, size);
42 EXPORT_SYMBOL(devm_ioremap);
45 * devm_ioremap_nocache - Managed ioremap_nocache()
46 * @dev: Generic device to remap IO address for
47 * @offset: BUS offset to map
50 * Managed ioremap_nocache(). Map is automatically unmapped on driver
53 void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
56 void __iomem **ptr, *addr;
58 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
62 addr = ioremap_nocache(offset, size);
71 EXPORT_SYMBOL(devm_ioremap_nocache);
74 * devm_iounmap - Managed iounmap()
75 * @dev: Generic device to unmap for
76 * @addr: Address to unmap
78 * Managed iounmap(). @addr must have been mapped using devm_ioremap*().
80 void devm_iounmap(struct device *dev, void __iomem *addr)
82 WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
86 EXPORT_SYMBOL(devm_iounmap);
89 * devm_request_and_ioremap() - Check, request region, and ioremap resource
90 * @dev: Generic device to handle the resource for
91 * @res: resource to be handled
93 * Takes all necessary steps to ioremap a mem resource. Uses managed device, so
94 * everything is undone on driver detach. Checks arguments, so you can feed
95 * it the result from e.g. platform_get_resource() directly. Returns the
96 * remapped pointer or NULL on error. Usage example:
98 * res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
99 * base = devm_request_and_ioremap(&pdev->dev, res);
101 * return -EADDRNOTAVAIL;
103 void __iomem *devm_request_and_ioremap(struct device *dev,
104 struct resource *res)
106 resource_size_t size;
108 void __iomem *dest_ptr;
112 if (!res || resource_type(res) != IORESOURCE_MEM) {
113 dev_err(dev, "invalid resource\n");
117 size = resource_size(res);
118 name = res->name ?: dev_name(dev);
120 if (!devm_request_mem_region(dev, res->start, size, name)) {
121 dev_err(dev, "can't request region for resource %pR\n", res);
125 if (res->flags & IORESOURCE_CACHEABLE)
126 dest_ptr = devm_ioremap(dev, res->start, size);
128 dest_ptr = devm_ioremap_nocache(dev, res->start, size);
131 dev_err(dev, "ioremap failed for resource %pR\n", res);
132 devm_release_mem_region(dev, res->start, size);
137 EXPORT_SYMBOL(devm_request_and_ioremap);
139 #ifdef CONFIG_HAS_IOPORT
141 * Generic iomap devres
143 static void devm_ioport_map_release(struct device *dev, void *res)
145 ioport_unmap(*(void __iomem **)res);
148 static int devm_ioport_map_match(struct device *dev, void *res,
151 return *(void **)res == match_data;
155 * devm_ioport_map - Managed ioport_map()
156 * @dev: Generic device to map ioport for
158 * @nr: Number of ports to map
160 * Managed ioport_map(). Map is automatically unmapped on driver
163 void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
166 void __iomem **ptr, *addr;
168 ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
172 addr = ioport_map(port, nr);
175 devres_add(dev, ptr);
181 EXPORT_SYMBOL(devm_ioport_map);
184 * devm_ioport_unmap - Managed ioport_unmap()
185 * @dev: Generic device to unmap for
186 * @addr: Address to unmap
188 * Managed ioport_unmap(). @addr must have been mapped using
191 void devm_ioport_unmap(struct device *dev, void __iomem *addr)
194 WARN_ON(devres_destroy(dev, devm_ioport_map_release,
195 devm_ioport_map_match, (void *)addr));
197 EXPORT_SYMBOL(devm_ioport_unmap);
203 #define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
205 struct pcim_iomap_devres {
206 void __iomem *table[PCIM_IOMAP_MAX];
209 static void pcim_iomap_release(struct device *gendev, void *res)
211 struct pci_dev *dev = container_of(gendev, struct pci_dev, dev);
212 struct pcim_iomap_devres *this = res;
215 for (i = 0; i < PCIM_IOMAP_MAX; i++)
217 pci_iounmap(dev, this->table[i]);
221 * pcim_iomap_table - access iomap allocation table
222 * @pdev: PCI device to access iomap table for
224 * Access iomap allocation table for @dev. If iomap table doesn't
225 * exist and @pdev is managed, it will be allocated. All iomaps
226 * recorded in the iomap table are automatically unmapped on driver
229 * This function might sleep when the table is first allocated but can
230 * be safely called without context and guaranteed to succed once
233 void __iomem * const * pcim_iomap_table(struct pci_dev *pdev)
235 struct pcim_iomap_devres *dr, *new_dr;
237 dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
241 new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
244 dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
247 EXPORT_SYMBOL(pcim_iomap_table);
250 * pcim_iomap - Managed pcim_iomap()
251 * @pdev: PCI device to iomap for
253 * @maxlen: Maximum length of iomap
255 * Managed pci_iomap(). Map is automatically unmapped on driver
258 void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
262 BUG_ON(bar >= PCIM_IOMAP_MAX);
264 tbl = (void __iomem **)pcim_iomap_table(pdev);
265 if (!tbl || tbl[bar]) /* duplicate mappings not allowed */
268 tbl[bar] = pci_iomap(pdev, bar, maxlen);
271 EXPORT_SYMBOL(pcim_iomap);
274 * pcim_iounmap - Managed pci_iounmap()
275 * @pdev: PCI device to iounmap for
276 * @addr: Address to unmap
278 * Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
280 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
285 pci_iounmap(pdev, addr);
287 tbl = (void __iomem **)pcim_iomap_table(pdev);
290 for (i = 0; i < PCIM_IOMAP_MAX; i++)
291 if (tbl[i] == addr) {
297 EXPORT_SYMBOL(pcim_iounmap);
300 * pcim_iomap_regions - Request and iomap PCI BARs
301 * @pdev: PCI device to map IO resources for
302 * @mask: Mask of BARs to request and iomap
303 * @name: Name used when requesting regions
305 * Request and iomap regions specified by @mask.
307 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name)
309 void __iomem * const *iomap;
312 iomap = pcim_iomap_table(pdev);
316 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
319 if (!(mask & (1 << i)))
323 len = pci_resource_len(pdev, i);
327 rc = pci_request_region(pdev, i, name);
332 if (!pcim_iomap(pdev, i, 0))
339 pci_release_region(pdev, i);
342 if (!(mask & (1 << i)))
344 pcim_iounmap(pdev, iomap[i]);
345 pci_release_region(pdev, i);
350 EXPORT_SYMBOL(pcim_iomap_regions);
353 * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
354 * @pdev: PCI device to map IO resources for
355 * @mask: Mask of BARs to iomap
356 * @name: Name used when requesting regions
358 * Request all PCI BARs and iomap regions specified by @mask.
360 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
363 int request_mask = ((1 << 6) - 1) & ~mask;
366 rc = pci_request_selected_regions(pdev, request_mask, name);
370 rc = pcim_iomap_regions(pdev, mask, name);
372 pci_release_selected_regions(pdev, request_mask);
375 EXPORT_SYMBOL(pcim_iomap_regions_request_all);
378 * pcim_iounmap_regions - Unmap and release PCI BARs
379 * @pdev: PCI device to map IO resources for
380 * @mask: Mask of BARs to unmap and release
382 * Unmap and release regions specified by @mask.
384 void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
386 void __iomem * const *iomap;
389 iomap = pcim_iomap_table(pdev);
393 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
394 if (!(mask & (1 << i)))
397 pcim_iounmap(pdev, iomap[i]);
398 pci_release_region(pdev, i);
401 EXPORT_SYMBOL(pcim_iounmap_regions);
402 #endif /* CONFIG_PCI */
403 #endif /* CONFIG_HAS_IOPORT */