1 // SPDX-License-Identifier: GPL-2.0
6 #include <linux/export.h>
8 void devm_ioremap_release(struct device *dev, void *res)
10 iounmap(*(void __iomem **)res);
13 static int devm_ioremap_match(struct device *dev, void *res, void *match_data)
15 return *(void **)res == match_data;
19 * devm_ioremap - Managed ioremap()
20 * @dev: Generic device to remap IO address for
21 * @offset: Resource address to map
24 * Managed ioremap(). Map is automatically unmapped on driver detach.
26 void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
29 void __iomem **ptr, *addr;
31 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
35 addr = ioremap(offset, size);
44 EXPORT_SYMBOL(devm_ioremap);
47 * devm_ioremap_nocache - Managed ioremap_nocache()
48 * @dev: Generic device to remap IO address for
49 * @offset: Resource address to map
52 * Managed ioremap_nocache(). Map is automatically unmapped on driver
55 void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
58 void __iomem **ptr, *addr;
60 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
64 addr = ioremap_nocache(offset, size);
73 EXPORT_SYMBOL(devm_ioremap_nocache);
76 * devm_ioremap_wc - Managed ioremap_wc()
77 * @dev: Generic device to remap IO address for
78 * @offset: Resource address to map
81 * Managed ioremap_wc(). Map is automatically unmapped on driver detach.
83 void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
86 void __iomem **ptr, *addr;
88 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
92 addr = ioremap_wc(offset, size);
101 EXPORT_SYMBOL(devm_ioremap_wc);
104 * devm_iounmap - Managed iounmap()
105 * @dev: Generic device to unmap for
106 * @addr: Address to unmap
108 * Managed iounmap(). @addr must have been mapped using devm_ioremap*().
110 void devm_iounmap(struct device *dev, void __iomem *addr)
112 WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
113 (__force void *)addr));
116 EXPORT_SYMBOL(devm_iounmap);
119 * devm_ioremap_resource() - check, request region, and ioremap resource
120 * @dev: generic device to handle the resource for
121 * @res: resource to be handled
123 * Checks that a resource is a valid memory region, requests the memory
124 * region and ioremaps it. All operations are managed and will be undone
127 * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
128 * on failure. Usage example:
130 * res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
131 * base = devm_ioremap_resource(&pdev->dev, res);
133 * return PTR_ERR(base);
135 void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res)
137 resource_size_t size;
139 void __iomem *dest_ptr;
143 if (!res || resource_type(res) != IORESOURCE_MEM) {
144 dev_err(dev, "invalid resource\n");
145 return IOMEM_ERR_PTR(-EINVAL);
148 size = resource_size(res);
149 name = res->name ?: dev_name(dev);
151 if (!devm_request_mem_region(dev, res->start, size, name)) {
152 dev_err(dev, "can't request region for resource %pR\n", res);
153 return IOMEM_ERR_PTR(-EBUSY);
156 dest_ptr = devm_ioremap(dev, res->start, size);
158 dev_err(dev, "ioremap failed for resource %pR\n", res);
159 devm_release_mem_region(dev, res->start, size);
160 dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
165 EXPORT_SYMBOL(devm_ioremap_resource);
167 #ifdef CONFIG_HAS_IOPORT_MAP
169 * Generic iomap devres
171 static void devm_ioport_map_release(struct device *dev, void *res)
173 ioport_unmap(*(void __iomem **)res);
176 static int devm_ioport_map_match(struct device *dev, void *res,
179 return *(void **)res == match_data;
183 * devm_ioport_map - Managed ioport_map()
184 * @dev: Generic device to map ioport for
186 * @nr: Number of ports to map
188 * Managed ioport_map(). Map is automatically unmapped on driver
191 void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
194 void __iomem **ptr, *addr;
196 ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
200 addr = ioport_map(port, nr);
203 devres_add(dev, ptr);
209 EXPORT_SYMBOL(devm_ioport_map);
212 * devm_ioport_unmap - Managed ioport_unmap()
213 * @dev: Generic device to unmap for
214 * @addr: Address to unmap
216 * Managed ioport_unmap(). @addr must have been mapped using
219 void devm_ioport_unmap(struct device *dev, void __iomem *addr)
222 WARN_ON(devres_destroy(dev, devm_ioport_map_release,
223 devm_ioport_map_match, (__force void *)addr));
225 EXPORT_SYMBOL(devm_ioport_unmap);
226 #endif /* CONFIG_HAS_IOPORT_MAP */
232 #define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
234 struct pcim_iomap_devres {
235 void __iomem *table[PCIM_IOMAP_MAX];
238 static void pcim_iomap_release(struct device *gendev, void *res)
240 struct pci_dev *dev = to_pci_dev(gendev);
241 struct pcim_iomap_devres *this = res;
244 for (i = 0; i < PCIM_IOMAP_MAX; i++)
246 pci_iounmap(dev, this->table[i]);
250 * pcim_iomap_table - access iomap allocation table
251 * @pdev: PCI device to access iomap table for
253 * Access iomap allocation table for @dev. If iomap table doesn't
254 * exist and @pdev is managed, it will be allocated. All iomaps
255 * recorded in the iomap table are automatically unmapped on driver
258 * This function might sleep when the table is first allocated but can
259 * be safely called without context and guaranteed to succed once
262 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev)
264 struct pcim_iomap_devres *dr, *new_dr;
266 dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
270 new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
273 dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
276 EXPORT_SYMBOL(pcim_iomap_table);
279 * pcim_iomap - Managed pcim_iomap()
280 * @pdev: PCI device to iomap for
282 * @maxlen: Maximum length of iomap
284 * Managed pci_iomap(). Map is automatically unmapped on driver
287 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
291 BUG_ON(bar >= PCIM_IOMAP_MAX);
293 tbl = (void __iomem **)pcim_iomap_table(pdev);
294 if (!tbl || tbl[bar]) /* duplicate mappings not allowed */
297 tbl[bar] = pci_iomap(pdev, bar, maxlen);
300 EXPORT_SYMBOL(pcim_iomap);
303 * pcim_iounmap - Managed pci_iounmap()
304 * @pdev: PCI device to iounmap for
305 * @addr: Address to unmap
307 * Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
309 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
314 pci_iounmap(pdev, addr);
316 tbl = (void __iomem **)pcim_iomap_table(pdev);
319 for (i = 0; i < PCIM_IOMAP_MAX; i++)
320 if (tbl[i] == addr) {
326 EXPORT_SYMBOL(pcim_iounmap);
329 * pcim_iomap_regions - Request and iomap PCI BARs
330 * @pdev: PCI device to map IO resources for
331 * @mask: Mask of BARs to request and iomap
332 * @name: Name used when requesting regions
334 * Request and iomap regions specified by @mask.
336 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name)
338 void __iomem * const *iomap;
341 iomap = pcim_iomap_table(pdev);
345 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
348 if (!(mask & (1 << i)))
352 len = pci_resource_len(pdev, i);
356 rc = pci_request_region(pdev, i, name);
361 if (!pcim_iomap(pdev, i, 0))
368 pci_release_region(pdev, i);
371 if (!(mask & (1 << i)))
373 pcim_iounmap(pdev, iomap[i]);
374 pci_release_region(pdev, i);
379 EXPORT_SYMBOL(pcim_iomap_regions);
382 * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
383 * @pdev: PCI device to map IO resources for
384 * @mask: Mask of BARs to iomap
385 * @name: Name used when requesting regions
387 * Request all PCI BARs and iomap regions specified by @mask.
389 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
392 int request_mask = ((1 << 6) - 1) & ~mask;
395 rc = pci_request_selected_regions(pdev, request_mask, name);
399 rc = pcim_iomap_regions(pdev, mask, name);
401 pci_release_selected_regions(pdev, request_mask);
404 EXPORT_SYMBOL(pcim_iomap_regions_request_all);
407 * pcim_iounmap_regions - Unmap and release PCI BARs
408 * @pdev: PCI device to map IO resources for
409 * @mask: Mask of BARs to unmap and release
411 * Unmap and release regions specified by @mask.
413 void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
415 void __iomem * const *iomap;
418 iomap = pcim_iomap_table(pdev);
422 for (i = 0; i < PCIM_IOMAP_MAX; i++) {
423 if (!(mask & (1 << i)))
426 pcim_iounmap(pdev, iomap[i]);
427 pci_release_region(pdev, i);
430 EXPORT_SYMBOL(pcim_iounmap_regions);
431 #endif /* CONFIG_PCI */