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1// SPDX-License-Identifier: GPL-2.0
2#include <linux/bug.h>
3#include <linux/device.h>
4#include <linux/errno.h>
5#include <linux/export.h>
6#include <linux/gfp_types.h>
7#include <linux/io.h>
8#include <linux/ioport.h>
9#include <linux/of_address.h>
10#include <linux/types.h>
11
12enum devm_ioremap_type {
13 DEVM_IOREMAP = 0,
14 DEVM_IOREMAP_UC,
15 DEVM_IOREMAP_WC,
16 DEVM_IOREMAP_NP,
17};
18
19void devm_ioremap_release(struct device *dev, void *res)
20{
21 iounmap(*(void __iomem **)res);
22}
23
24static int devm_ioremap_match(struct device *dev, void *res, void *match_data)
25{
26 return *(void **)res == match_data;
27}
28
29static void __iomem *__devm_ioremap(struct device *dev, resource_size_t offset,
30 resource_size_t size,
31 enum devm_ioremap_type type)
32{
33 void __iomem **ptr, *addr = NULL;
34
35 ptr = devres_alloc_node(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL,
36 dev_to_node(dev));
37 if (!ptr)
38 return NULL;
39
40 switch (type) {
41 case DEVM_IOREMAP:
42 addr = ioremap(offset, size);
43 break;
44 case DEVM_IOREMAP_UC:
45 addr = ioremap_uc(offset, size);
46 break;
47 case DEVM_IOREMAP_WC:
48 addr = ioremap_wc(offset, size);
49 break;
50 case DEVM_IOREMAP_NP:
51 addr = ioremap_np(offset, size);
52 break;
53 }
54
55 if (addr) {
56 *ptr = addr;
57 devres_add(dev, ptr);
58 } else
59 devres_free(ptr);
60
61 return addr;
62}
63
64/**
65 * devm_ioremap - Managed ioremap()
66 * @dev: Generic device to remap IO address for
67 * @offset: Resource address to map
68 * @size: Size of map
69 *
70 * Managed ioremap(). Map is automatically unmapped on driver detach.
71 */
72void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
73 resource_size_t size)
74{
75 return __devm_ioremap(dev, offset, size, DEVM_IOREMAP);
76}
77EXPORT_SYMBOL(devm_ioremap);
78
79/**
80 * devm_ioremap_uc - Managed ioremap_uc()
81 * @dev: Generic device to remap IO address for
82 * @offset: Resource address to map
83 * @size: Size of map
84 *
85 * Managed ioremap_uc(). Map is automatically unmapped on driver detach.
86 */
87void __iomem *devm_ioremap_uc(struct device *dev, resource_size_t offset,
88 resource_size_t size)
89{
90 return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_UC);
91}
92EXPORT_SYMBOL_GPL(devm_ioremap_uc);
93
94/**
95 * devm_ioremap_wc - Managed ioremap_wc()
96 * @dev: Generic device to remap IO address for
97 * @offset: Resource address to map
98 * @size: Size of map
99 *
100 * Managed ioremap_wc(). Map is automatically unmapped on driver detach.
101 */
102void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
103 resource_size_t size)
104{
105 return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_WC);
106}
107EXPORT_SYMBOL(devm_ioremap_wc);
108
109/**
110 * devm_iounmap - Managed iounmap()
111 * @dev: Generic device to unmap for
112 * @addr: Address to unmap
113 *
114 * Managed iounmap(). @addr must have been mapped using devm_ioremap*().
115 */
116void devm_iounmap(struct device *dev, void __iomem *addr)
117{
118 WARN_ON(devres_release(dev, devm_ioremap_release, devm_ioremap_match,
119 (__force void *)addr));
120}
121EXPORT_SYMBOL(devm_iounmap);
122
123static void __iomem *
124__devm_ioremap_resource(struct device *dev, const struct resource *res,
125 enum devm_ioremap_type type)
126{
127 resource_size_t size;
128 void __iomem *dest_ptr;
129 char *pretty_name;
130 int ret;
131
132 BUG_ON(!dev);
133
134 if (!res || resource_type(res) != IORESOURCE_MEM) {
135 ret = dev_err_probe(dev, -EINVAL, "invalid resource %pR\n", res);
136 return IOMEM_ERR_PTR(ret);
137 }
138
139 if (type == DEVM_IOREMAP && res->flags & IORESOURCE_MEM_NONPOSTED)
140 type = DEVM_IOREMAP_NP;
141
142 size = resource_size(res);
143
144 if (res->name)
145 pretty_name = devm_kasprintf(dev, GFP_KERNEL, "%s %s",
146 dev_name(dev), res->name);
147 else
148 pretty_name = devm_kstrdup(dev, dev_name(dev), GFP_KERNEL);
149 if (!pretty_name) {
150 ret = dev_err_probe(dev, -ENOMEM, "can't generate pretty name for resource %pR\n", res);
151 return IOMEM_ERR_PTR(ret);
152 }
153
154 if (!devm_request_mem_region(dev, res->start, size, pretty_name)) {
155 ret = dev_err_probe(dev, -EBUSY, "can't request region for resource %pR\n", res);
156 return IOMEM_ERR_PTR(ret);
157 }
158
159 dest_ptr = __devm_ioremap(dev, res->start, size, type);
160 if (!dest_ptr) {
161 devm_release_mem_region(dev, res->start, size);
162 ret = dev_err_probe(dev, -ENOMEM, "ioremap failed for resource %pR\n", res);
163 return IOMEM_ERR_PTR(ret);
164 }
165
166 return dest_ptr;
167}
168
169/**
170 * devm_ioremap_resource() - check, request region, and ioremap resource
171 * @dev: generic device to handle the resource for
172 * @res: resource to be handled
173 *
174 * Checks that a resource is a valid memory region, requests the memory
175 * region and ioremaps it. All operations are managed and will be undone
176 * on driver detach.
177 *
178 * Usage example:
179 *
180 * res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
181 * base = devm_ioremap_resource(&pdev->dev, res);
182 * if (IS_ERR(base))
183 * return PTR_ERR(base);
184 *
185 * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
186 * on failure.
187 */
188void __iomem *devm_ioremap_resource(struct device *dev,
189 const struct resource *res)
190{
191 return __devm_ioremap_resource(dev, res, DEVM_IOREMAP);
192}
193EXPORT_SYMBOL(devm_ioremap_resource);
194
195/**
196 * devm_ioremap_resource_wc() - write-combined variant of
197 * devm_ioremap_resource()
198 * @dev: generic device to handle the resource for
199 * @res: resource to be handled
200 *
201 * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
202 * on failure.
203 */
204void __iomem *devm_ioremap_resource_wc(struct device *dev,
205 const struct resource *res)
206{
207 return __devm_ioremap_resource(dev, res, DEVM_IOREMAP_WC);
208}
209
210/*
211 * devm_of_iomap - Requests a resource and maps the memory mapped IO
212 * for a given device_node managed by a given device
213 *
214 * Checks that a resource is a valid memory region, requests the memory
215 * region and ioremaps it. All operations are managed and will be undone
216 * on driver detach of the device.
217 *
218 * This is to be used when a device requests/maps resources described
219 * by other device tree nodes (children or otherwise).
220 *
221 * @dev: The device "managing" the resource
222 * @node: The device-tree node where the resource resides
223 * @index: index of the MMIO range in the "reg" property
224 * @size: Returns the size of the resource (pass NULL if not needed)
225 *
226 * Usage example:
227 *
228 * base = devm_of_iomap(&pdev->dev, node, 0, NULL);
229 * if (IS_ERR(base))
230 * return PTR_ERR(base);
231 *
232 * Please Note: This is not a one-to-one replacement for of_iomap() because the
233 * of_iomap() function does not track whether the region is already mapped. If
234 * two drivers try to map the same memory, the of_iomap() function will succeed
235 * but the devm_of_iomap() function will return -EBUSY.
236 *
237 * Return: a pointer to the requested and mapped memory or an ERR_PTR() encoded
238 * error code on failure.
239 */
240void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index,
241 resource_size_t *size)
242{
243 struct resource res;
244
245 if (of_address_to_resource(node, index, &res))
246 return IOMEM_ERR_PTR(-EINVAL);
247 if (size)
248 *size = resource_size(&res);
249 return devm_ioremap_resource(dev, &res);
250}
251EXPORT_SYMBOL(devm_of_iomap);
252
253#ifdef CONFIG_HAS_IOPORT_MAP
254/*
255 * Generic iomap devres
256 */
257static void devm_ioport_map_release(struct device *dev, void *res)
258{
259 ioport_unmap(*(void __iomem **)res);
260}
261
262static int devm_ioport_map_match(struct device *dev, void *res,
263 void *match_data)
264{
265 return *(void **)res == match_data;
266}
267
268/**
269 * devm_ioport_map - Managed ioport_map()
270 * @dev: Generic device to map ioport for
271 * @port: Port to map
272 * @nr: Number of ports to map
273 *
274 * Managed ioport_map(). Map is automatically unmapped on driver
275 * detach.
276 *
277 * Return: a pointer to the remapped memory or NULL on failure.
278 */
279void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
280 unsigned int nr)
281{
282 void __iomem **ptr, *addr;
283
284 ptr = devres_alloc_node(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL,
285 dev_to_node(dev));
286 if (!ptr)
287 return NULL;
288
289 addr = ioport_map(port, nr);
290 if (addr) {
291 *ptr = addr;
292 devres_add(dev, ptr);
293 } else
294 devres_free(ptr);
295
296 return addr;
297}
298EXPORT_SYMBOL(devm_ioport_map);
299
300/**
301 * devm_ioport_unmap - Managed ioport_unmap()
302 * @dev: Generic device to unmap for
303 * @addr: Address to unmap
304 *
305 * Managed ioport_unmap(). @addr must have been mapped using
306 * devm_ioport_map().
307 */
308void devm_ioport_unmap(struct device *dev, void __iomem *addr)
309{
310 WARN_ON(devres_release(dev, devm_ioport_map_release,
311 devm_ioport_map_match, (__force void *)addr));
312}
313EXPORT_SYMBOL(devm_ioport_unmap);
314#endif /* CONFIG_HAS_IOPORT_MAP */
315
316static void devm_arch_phys_ac_add_release(struct device *dev, void *res)
317{
318 arch_phys_wc_del(*((int *)res));
319}
320
321/**
322 * devm_arch_phys_wc_add - Managed arch_phys_wc_add()
323 * @dev: Managed device
324 * @base: Memory base address
325 * @size: Size of memory range
326 *
327 * Adds a WC MTRR using arch_phys_wc_add() and sets up a release callback.
328 * See arch_phys_wc_add() for more information.
329 */
330int devm_arch_phys_wc_add(struct device *dev, unsigned long base, unsigned long size)
331{
332 int *mtrr;
333 int ret;
334
335 mtrr = devres_alloc_node(devm_arch_phys_ac_add_release, sizeof(*mtrr), GFP_KERNEL,
336 dev_to_node(dev));
337 if (!mtrr)
338 return -ENOMEM;
339
340 ret = arch_phys_wc_add(base, size);
341 if (ret < 0) {
342 devres_free(mtrr);
343 return ret;
344 }
345
346 *mtrr = ret;
347 devres_add(dev, mtrr);
348
349 return ret;
350}
351EXPORT_SYMBOL(devm_arch_phys_wc_add);
352
353struct arch_io_reserve_memtype_wc_devres {
354 resource_size_t start;
355 resource_size_t size;
356};
357
358static void devm_arch_io_free_memtype_wc_release(struct device *dev, void *res)
359{
360 const struct arch_io_reserve_memtype_wc_devres *this = res;
361
362 arch_io_free_memtype_wc(this->start, this->size);
363}
364
365/**
366 * devm_arch_io_reserve_memtype_wc - Managed arch_io_reserve_memtype_wc()
367 * @dev: Managed device
368 * @start: Memory base address
369 * @size: Size of memory range
370 *
371 * Reserves a memory range with WC caching using arch_io_reserve_memtype_wc()
372 * and sets up a release callback See arch_io_reserve_memtype_wc() for more
373 * information.
374 */
375int devm_arch_io_reserve_memtype_wc(struct device *dev, resource_size_t start,
376 resource_size_t size)
377{
378 struct arch_io_reserve_memtype_wc_devres *dr;
379 int ret;
380
381 dr = devres_alloc_node(devm_arch_io_free_memtype_wc_release, sizeof(*dr), GFP_KERNEL,
382 dev_to_node(dev));
383 if (!dr)
384 return -ENOMEM;
385
386 ret = arch_io_reserve_memtype_wc(start, size);
387 if (ret < 0) {
388 devres_free(dr);
389 return ret;
390 }
391
392 dr->start = start;
393 dr->size = size;
394 devres_add(dev, dr);
395
396 return ret;
397}
398EXPORT_SYMBOL(devm_arch_io_reserve_memtype_wc);
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/err.h>
3#include <linux/pci.h>
4#include <linux/io.h>
5#include <linux/gfp.h>
6#include <linux/export.h>
7#include <linux/of_address.h>
8
9enum devm_ioremap_type {
10 DEVM_IOREMAP = 0,
11 DEVM_IOREMAP_UC,
12 DEVM_IOREMAP_WC,
13};
14
15void devm_ioremap_release(struct device *dev, void *res)
16{
17 iounmap(*(void __iomem **)res);
18}
19
20static int devm_ioremap_match(struct device *dev, void *res, void *match_data)
21{
22 return *(void **)res == match_data;
23}
24
25static void __iomem *__devm_ioremap(struct device *dev, resource_size_t offset,
26 resource_size_t size,
27 enum devm_ioremap_type type)
28{
29 void __iomem **ptr, *addr = NULL;
30
31 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
32 if (!ptr)
33 return NULL;
34
35 switch (type) {
36 case DEVM_IOREMAP:
37 addr = ioremap(offset, size);
38 break;
39 case DEVM_IOREMAP_UC:
40 addr = ioremap_uc(offset, size);
41 break;
42 case DEVM_IOREMAP_WC:
43 addr = ioremap_wc(offset, size);
44 break;
45 }
46
47 if (addr) {
48 *ptr = addr;
49 devres_add(dev, ptr);
50 } else
51 devres_free(ptr);
52
53 return addr;
54}
55
56/**
57 * devm_ioremap - Managed ioremap()
58 * @dev: Generic device to remap IO address for
59 * @offset: Resource address to map
60 * @size: Size of map
61 *
62 * Managed ioremap(). Map is automatically unmapped on driver detach.
63 */
64void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
65 resource_size_t size)
66{
67 return __devm_ioremap(dev, offset, size, DEVM_IOREMAP);
68}
69EXPORT_SYMBOL(devm_ioremap);
70
71/**
72 * devm_ioremap_uc - Managed ioremap_uc()
73 * @dev: Generic device to remap IO address for
74 * @offset: Resource address to map
75 * @size: Size of map
76 *
77 * Managed ioremap_uc(). Map is automatically unmapped on driver detach.
78 */
79void __iomem *devm_ioremap_uc(struct device *dev, resource_size_t offset,
80 resource_size_t size)
81{
82 return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_UC);
83}
84EXPORT_SYMBOL_GPL(devm_ioremap_uc);
85
86/**
87 * devm_ioremap_wc - Managed ioremap_wc()
88 * @dev: Generic device to remap IO address for
89 * @offset: Resource address to map
90 * @size: Size of map
91 *
92 * Managed ioremap_wc(). Map is automatically unmapped on driver detach.
93 */
94void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
95 resource_size_t size)
96{
97 return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_WC);
98}
99EXPORT_SYMBOL(devm_ioremap_wc);
100
101/**
102 * devm_iounmap - Managed iounmap()
103 * @dev: Generic device to unmap for
104 * @addr: Address to unmap
105 *
106 * Managed iounmap(). @addr must have been mapped using devm_ioremap*().
107 */
108void devm_iounmap(struct device *dev, void __iomem *addr)
109{
110 WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
111 (__force void *)addr));
112 iounmap(addr);
113}
114EXPORT_SYMBOL(devm_iounmap);
115
116static void __iomem *
117__devm_ioremap_resource(struct device *dev, const struct resource *res,
118 enum devm_ioremap_type type)
119{
120 resource_size_t size;
121 void __iomem *dest_ptr;
122 char *pretty_name;
123
124 BUG_ON(!dev);
125
126 if (!res || resource_type(res) != IORESOURCE_MEM) {
127 dev_err(dev, "invalid resource\n");
128 return IOMEM_ERR_PTR(-EINVAL);
129 }
130
131 size = resource_size(res);
132
133 if (res->name)
134 pretty_name = devm_kasprintf(dev, GFP_KERNEL, "%s %s",
135 dev_name(dev), res->name);
136 else
137 pretty_name = devm_kstrdup(dev, dev_name(dev), GFP_KERNEL);
138 if (!pretty_name)
139 return IOMEM_ERR_PTR(-ENOMEM);
140
141 if (!devm_request_mem_region(dev, res->start, size, pretty_name)) {
142 dev_err(dev, "can't request region for resource %pR\n", res);
143 return IOMEM_ERR_PTR(-EBUSY);
144 }
145
146 dest_ptr = __devm_ioremap(dev, res->start, size, type);
147 if (!dest_ptr) {
148 dev_err(dev, "ioremap failed for resource %pR\n", res);
149 devm_release_mem_region(dev, res->start, size);
150 dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
151 }
152
153 return dest_ptr;
154}
155
156/**
157 * devm_ioremap_resource() - check, request region, and ioremap resource
158 * @dev: generic device to handle the resource for
159 * @res: resource to be handled
160 *
161 * Checks that a resource is a valid memory region, requests the memory
162 * region and ioremaps it. All operations are managed and will be undone
163 * on driver detach.
164 *
165 * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
166 * on failure. Usage example:
167 *
168 * res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
169 * base = devm_ioremap_resource(&pdev->dev, res);
170 * if (IS_ERR(base))
171 * return PTR_ERR(base);
172 */
173void __iomem *devm_ioremap_resource(struct device *dev,
174 const struct resource *res)
175{
176 return __devm_ioremap_resource(dev, res, DEVM_IOREMAP);
177}
178EXPORT_SYMBOL(devm_ioremap_resource);
179
180/**
181 * devm_ioremap_resource_wc() - write-combined variant of
182 * devm_ioremap_resource()
183 * @dev: generic device to handle the resource for
184 * @res: resource to be handled
185 *
186 * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
187 * on failure. Usage example:
188 */
189void __iomem *devm_ioremap_resource_wc(struct device *dev,
190 const struct resource *res)
191{
192 return __devm_ioremap_resource(dev, res, DEVM_IOREMAP_WC);
193}
194
195/*
196 * devm_of_iomap - Requests a resource and maps the memory mapped IO
197 * for a given device_node managed by a given device
198 *
199 * Checks that a resource is a valid memory region, requests the memory
200 * region and ioremaps it. All operations are managed and will be undone
201 * on driver detach of the device.
202 *
203 * This is to be used when a device requests/maps resources described
204 * by other device tree nodes (children or otherwise).
205 *
206 * @dev: The device "managing" the resource
207 * @node: The device-tree node where the resource resides
208 * @index: index of the MMIO range in the "reg" property
209 * @size: Returns the size of the resource (pass NULL if not needed)
210 * Returns a pointer to the requested and mapped memory or an ERR_PTR() encoded
211 * error code on failure. Usage example:
212 *
213 * base = devm_of_iomap(&pdev->dev, node, 0, NULL);
214 * if (IS_ERR(base))
215 * return PTR_ERR(base);
216 *
217 * Please Note: This is not a one-to-one replacement for of_iomap() because the
218 * of_iomap() function does not track whether the region is already mapped. If
219 * two drivers try to map the same memory, the of_iomap() function will succeed
220 * but the the devm_of_iomap() function will return -EBUSY.
221 *
222 */
223void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index,
224 resource_size_t *size)
225{
226 struct resource res;
227
228 if (of_address_to_resource(node, index, &res))
229 return IOMEM_ERR_PTR(-EINVAL);
230 if (size)
231 *size = resource_size(&res);
232 return devm_ioremap_resource(dev, &res);
233}
234EXPORT_SYMBOL(devm_of_iomap);
235
236#ifdef CONFIG_HAS_IOPORT_MAP
237/*
238 * Generic iomap devres
239 */
240static void devm_ioport_map_release(struct device *dev, void *res)
241{
242 ioport_unmap(*(void __iomem **)res);
243}
244
245static int devm_ioport_map_match(struct device *dev, void *res,
246 void *match_data)
247{
248 return *(void **)res == match_data;
249}
250
251/**
252 * devm_ioport_map - Managed ioport_map()
253 * @dev: Generic device to map ioport for
254 * @port: Port to map
255 * @nr: Number of ports to map
256 *
257 * Managed ioport_map(). Map is automatically unmapped on driver
258 * detach.
259 */
260void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
261 unsigned int nr)
262{
263 void __iomem **ptr, *addr;
264
265 ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
266 if (!ptr)
267 return NULL;
268
269 addr = ioport_map(port, nr);
270 if (addr) {
271 *ptr = addr;
272 devres_add(dev, ptr);
273 } else
274 devres_free(ptr);
275
276 return addr;
277}
278EXPORT_SYMBOL(devm_ioport_map);
279
280/**
281 * devm_ioport_unmap - Managed ioport_unmap()
282 * @dev: Generic device to unmap for
283 * @addr: Address to unmap
284 *
285 * Managed ioport_unmap(). @addr must have been mapped using
286 * devm_ioport_map().
287 */
288void devm_ioport_unmap(struct device *dev, void __iomem *addr)
289{
290 ioport_unmap(addr);
291 WARN_ON(devres_destroy(dev, devm_ioport_map_release,
292 devm_ioport_map_match, (__force void *)addr));
293}
294EXPORT_SYMBOL(devm_ioport_unmap);
295#endif /* CONFIG_HAS_IOPORT_MAP */
296
297#ifdef CONFIG_PCI
298/*
299 * PCI iomap devres
300 */
301#define PCIM_IOMAP_MAX PCI_STD_NUM_BARS
302
303struct pcim_iomap_devres {
304 void __iomem *table[PCIM_IOMAP_MAX];
305};
306
307static void pcim_iomap_release(struct device *gendev, void *res)
308{
309 struct pci_dev *dev = to_pci_dev(gendev);
310 struct pcim_iomap_devres *this = res;
311 int i;
312
313 for (i = 0; i < PCIM_IOMAP_MAX; i++)
314 if (this->table[i])
315 pci_iounmap(dev, this->table[i]);
316}
317
318/**
319 * pcim_iomap_table - access iomap allocation table
320 * @pdev: PCI device to access iomap table for
321 *
322 * Access iomap allocation table for @dev. If iomap table doesn't
323 * exist and @pdev is managed, it will be allocated. All iomaps
324 * recorded in the iomap table are automatically unmapped on driver
325 * detach.
326 *
327 * This function might sleep when the table is first allocated but can
328 * be safely called without context and guaranteed to succed once
329 * allocated.
330 */
331void __iomem * const *pcim_iomap_table(struct pci_dev *pdev)
332{
333 struct pcim_iomap_devres *dr, *new_dr;
334
335 dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
336 if (dr)
337 return dr->table;
338
339 new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
340 if (!new_dr)
341 return NULL;
342 dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
343 return dr->table;
344}
345EXPORT_SYMBOL(pcim_iomap_table);
346
347/**
348 * pcim_iomap - Managed pcim_iomap()
349 * @pdev: PCI device to iomap for
350 * @bar: BAR to iomap
351 * @maxlen: Maximum length of iomap
352 *
353 * Managed pci_iomap(). Map is automatically unmapped on driver
354 * detach.
355 */
356void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
357{
358 void __iomem **tbl;
359
360 BUG_ON(bar >= PCIM_IOMAP_MAX);
361
362 tbl = (void __iomem **)pcim_iomap_table(pdev);
363 if (!tbl || tbl[bar]) /* duplicate mappings not allowed */
364 return NULL;
365
366 tbl[bar] = pci_iomap(pdev, bar, maxlen);
367 return tbl[bar];
368}
369EXPORT_SYMBOL(pcim_iomap);
370
371/**
372 * pcim_iounmap - Managed pci_iounmap()
373 * @pdev: PCI device to iounmap for
374 * @addr: Address to unmap
375 *
376 * Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
377 */
378void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
379{
380 void __iomem **tbl;
381 int i;
382
383 pci_iounmap(pdev, addr);
384
385 tbl = (void __iomem **)pcim_iomap_table(pdev);
386 BUG_ON(!tbl);
387
388 for (i = 0; i < PCIM_IOMAP_MAX; i++)
389 if (tbl[i] == addr) {
390 tbl[i] = NULL;
391 return;
392 }
393 WARN_ON(1);
394}
395EXPORT_SYMBOL(pcim_iounmap);
396
397/**
398 * pcim_iomap_regions - Request and iomap PCI BARs
399 * @pdev: PCI device to map IO resources for
400 * @mask: Mask of BARs to request and iomap
401 * @name: Name used when requesting regions
402 *
403 * Request and iomap regions specified by @mask.
404 */
405int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name)
406{
407 void __iomem * const *iomap;
408 int i, rc;
409
410 iomap = pcim_iomap_table(pdev);
411 if (!iomap)
412 return -ENOMEM;
413
414 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
415 unsigned long len;
416
417 if (!(mask & (1 << i)))
418 continue;
419
420 rc = -EINVAL;
421 len = pci_resource_len(pdev, i);
422 if (!len)
423 goto err_inval;
424
425 rc = pci_request_region(pdev, i, name);
426 if (rc)
427 goto err_inval;
428
429 rc = -ENOMEM;
430 if (!pcim_iomap(pdev, i, 0))
431 goto err_region;
432 }
433
434 return 0;
435
436 err_region:
437 pci_release_region(pdev, i);
438 err_inval:
439 while (--i >= 0) {
440 if (!(mask & (1 << i)))
441 continue;
442 pcim_iounmap(pdev, iomap[i]);
443 pci_release_region(pdev, i);
444 }
445
446 return rc;
447}
448EXPORT_SYMBOL(pcim_iomap_regions);
449
450/**
451 * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
452 * @pdev: PCI device to map IO resources for
453 * @mask: Mask of BARs to iomap
454 * @name: Name used when requesting regions
455 *
456 * Request all PCI BARs and iomap regions specified by @mask.
457 */
458int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
459 const char *name)
460{
461 int request_mask = ((1 << 6) - 1) & ~mask;
462 int rc;
463
464 rc = pci_request_selected_regions(pdev, request_mask, name);
465 if (rc)
466 return rc;
467
468 rc = pcim_iomap_regions(pdev, mask, name);
469 if (rc)
470 pci_release_selected_regions(pdev, request_mask);
471 return rc;
472}
473EXPORT_SYMBOL(pcim_iomap_regions_request_all);
474
475/**
476 * pcim_iounmap_regions - Unmap and release PCI BARs
477 * @pdev: PCI device to map IO resources for
478 * @mask: Mask of BARs to unmap and release
479 *
480 * Unmap and release regions specified by @mask.
481 */
482void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
483{
484 void __iomem * const *iomap;
485 int i;
486
487 iomap = pcim_iomap_table(pdev);
488 if (!iomap)
489 return;
490
491 for (i = 0; i < PCIM_IOMAP_MAX; i++) {
492 if (!(mask & (1 << i)))
493 continue;
494
495 pcim_iounmap(pdev, iomap[i]);
496 pci_release_region(pdev, i);
497 }
498}
499EXPORT_SYMBOL(pcim_iounmap_regions);
500#endif /* CONFIG_PCI */