1 // SPDX-License-Identifier: GPL-2.0
6 #include <linux/export.h>
8 enum devm_ioremap_type {
14 void devm_ioremap_release(struct device *dev, void *res)
16 iounmap(*(void __iomem **)res);
19 static int devm_ioremap_match(struct device *dev, void *res, void *match_data)
21 return *(void **)res == match_data;
24 static void __iomem *__devm_ioremap(struct device *dev, resource_size_t offset,
26 enum devm_ioremap_type type)
28 void __iomem **ptr, *addr = NULL;
30 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
36 addr = ioremap(offset, size);
39 addr = ioremap_nocache(offset, size);
42 addr = ioremap_wc(offset, size);
56 * devm_ioremap - Managed ioremap()
57 * @dev: Generic device to remap IO address for
58 * @offset: Resource address to map
61 * Managed ioremap(). Map is automatically unmapped on driver detach.
63 void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
66 return __devm_ioremap(dev, offset, size, DEVM_IOREMAP);
68 EXPORT_SYMBOL(devm_ioremap);
71 * devm_ioremap_nocache - Managed ioremap_nocache()
72 * @dev: Generic device to remap IO address for
73 * @offset: Resource address to map
76 * Managed ioremap_nocache(). Map is automatically unmapped on driver
79 void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
82 return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_NC);
84 EXPORT_SYMBOL(devm_ioremap_nocache);
87 * devm_ioremap_wc - Managed ioremap_wc()
88 * @dev: Generic device to remap IO address for
89 * @offset: Resource address to map
92 * Managed ioremap_wc(). Map is automatically unmapped on driver detach.
94 void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
97 return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_WC);
99 EXPORT_SYMBOL(devm_ioremap_wc);
102 * devm_iounmap - Managed iounmap()
103 * @dev: Generic device to unmap for
104 * @addr: Address to unmap
106 * Managed iounmap(). @addr must have been mapped using devm_ioremap*().
108 void devm_iounmap(struct device *dev, void __iomem *addr)
110 WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
111 (__force void *)addr));
114 EXPORT_SYMBOL(devm_iounmap);
117 * devm_ioremap_resource() - check, request region, and ioremap resource
118 * @dev: generic device to handle the resource for
119 * @res: resource to be handled
121 * Checks that a resource is a valid memory region, requests the memory
122 * region and ioremaps it. All operations are managed and will be undone
125 * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
126 * on failure. Usage example:
128 * res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
129 * base = devm_ioremap_resource(&pdev->dev, res);
131 * return PTR_ERR(base);
133 void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res)
135 resource_size_t size;
137 void __iomem *dest_ptr;
141 if (!res || resource_type(res) != IORESOURCE_MEM) {
142 dev_err(dev, "invalid resource\n");
143 return IOMEM_ERR_PTR(-EINVAL);
146 size = resource_size(res);
147 name = res->name ?: dev_name(dev);
149 if (!devm_request_mem_region(dev, res->start, size, name)) {
150 dev_err(dev, "can't request region for resource %pR\n", res);
151 return IOMEM_ERR_PTR(-EBUSY);
154 dest_ptr = devm_ioremap(dev, res->start, size);
156 dev_err(dev, "ioremap failed for resource %pR\n", res);
157 devm_release_mem_region(dev, res->start, size);
158 dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
163 EXPORT_SYMBOL(devm_ioremap_resource);
165 #ifdef CONFIG_HAS_IOPORT_MAP
167 * Generic iomap devres
169 static void devm_ioport_map_release(struct device *dev, void *res)
171 ioport_unmap(*(void __iomem **)res);
174 static int devm_ioport_map_match(struct device *dev, void *res,
177 return *(void **)res == match_data;
181 * devm_ioport_map - Managed ioport_map()
182 * @dev: Generic device to map ioport for
184 * @nr: Number of ports to map
186 * Managed ioport_map(). Map is automatically unmapped on driver
189 void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
192 void __iomem **ptr, *addr;
194 ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
198 addr = ioport_map(port, nr);
201 devres_add(dev, ptr);
207 EXPORT_SYMBOL(devm_ioport_map);
210 * devm_ioport_unmap - Managed ioport_unmap()
211 * @dev: Generic device to unmap for
212 * @addr: Address to unmap
214 * Managed ioport_unmap(). @addr must have been mapped using
217 void devm_ioport_unmap(struct device *dev, void __iomem *addr)
220 WARN_ON(devres_destroy(dev, devm_ioport_map_release,
221 devm_ioport_map_match, (__force void *)addr));
223 EXPORT_SYMBOL(devm_ioport_unmap);
224 #endif /* CONFIG_HAS_IOPORT_MAP */
230 #define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
232 struct pcim_iomap_devres {
233 void __iomem *table[PCIM_IOMAP_MAX];
236 static void pcim_iomap_release(struct device *gendev, void *res)
238 struct pci_dev *dev = to_pci_dev(gendev);
239 struct pcim_iomap_devres *this = res;
242 for (i = 0; i < PCIM_IOMAP_MAX; i++)
244 pci_iounmap(dev, this->table[i]);
248 * pcim_iomap_table - access iomap allocation table
249 * @pdev: PCI device to access iomap table for
251 * Access iomap allocation table for @dev. If iomap table doesn't
252 * exist and @pdev is managed, it will be allocated. All iomaps
253 * recorded in the iomap table are automatically unmapped on driver
256 * This function might sleep when the table is first allocated but can
257 * be safely called without context and guaranteed to succed once
260 void __iomem * const *pcim_iomap_table(struct pci_dev *pdev)
262 struct pcim_iomap_devres *dr, *new_dr;
264 dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
268 new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
271 dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
274 EXPORT_SYMBOL(pcim_iomap_table);
277 * pcim_iomap - Managed pcim_iomap()
278 * @pdev: PCI device to iomap for
280 * @maxlen: Maximum length of iomap
282 * Managed pci_iomap(). Map is automatically unmapped on driver
285 void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
289 BUG_ON(bar >= PCIM_IOMAP_MAX);
291 tbl = (void __iomem **)pcim_iomap_table(pdev);
292 if (!tbl || tbl[bar]) /* duplicate mappings not allowed */
295 tbl[bar] = pci_iomap(pdev, bar, maxlen);
298 EXPORT_SYMBOL(pcim_iomap);
301 * pcim_iounmap - Managed pci_iounmap()
302 * @pdev: PCI device to iounmap for
303 * @addr: Address to unmap
305 * Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
307 void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
312 pci_iounmap(pdev, addr);
314 tbl = (void __iomem **)pcim_iomap_table(pdev);
317 for (i = 0; i < PCIM_IOMAP_MAX; i++)
318 if (tbl[i] == addr) {
324 EXPORT_SYMBOL(pcim_iounmap);
327 * pcim_iomap_regions - Request and iomap PCI BARs
328 * @pdev: PCI device to map IO resources for
329 * @mask: Mask of BARs to request and iomap
330 * @name: Name used when requesting regions
332 * Request and iomap regions specified by @mask.
334 int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name)
336 void __iomem * const *iomap;
339 iomap = pcim_iomap_table(pdev);
343 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
346 if (!(mask & (1 << i)))
350 len = pci_resource_len(pdev, i);
354 rc = pci_request_region(pdev, i, name);
359 if (!pcim_iomap(pdev, i, 0))
366 pci_release_region(pdev, i);
369 if (!(mask & (1 << i)))
371 pcim_iounmap(pdev, iomap[i]);
372 pci_release_region(pdev, i);
377 EXPORT_SYMBOL(pcim_iomap_regions);
380 * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
381 * @pdev: PCI device to map IO resources for
382 * @mask: Mask of BARs to iomap
383 * @name: Name used when requesting regions
385 * Request all PCI BARs and iomap regions specified by @mask.
387 int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
390 int request_mask = ((1 << 6) - 1) & ~mask;
393 rc = pci_request_selected_regions(pdev, request_mask, name);
397 rc = pcim_iomap_regions(pdev, mask, name);
399 pci_release_selected_regions(pdev, request_mask);
402 EXPORT_SYMBOL(pcim_iomap_regions_request_all);
405 * pcim_iounmap_regions - Unmap and release PCI BARs
406 * @pdev: PCI device to map IO resources for
407 * @mask: Mask of BARs to unmap and release
409 * Unmap and release regions specified by @mask.
411 void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
413 void __iomem * const *iomap;
416 iomap = pcim_iomap_table(pdev);
420 for (i = 0; i < PCIM_IOMAP_MAX; i++) {
421 if (!(mask & (1 << i)))
424 pcim_iounmap(pdev, iomap[i]);
425 pci_release_region(pdev, i);
428 EXPORT_SYMBOL(pcim_iounmap_regions);
429 #endif /* CONFIG_PCI */