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1 | #include <linux/pci.h> |
2 | #include <linux/io.h> |
3 | #include <linux/gfp.h> |
4 | #include <linux/module.h> |
5 | |
6 | void devm_ioremap_release(struct device *dev, void *res) |
7 | { |
8 | iounmap(*(void __iomem **)res); |
9 | } |
10 | |
11 | static int devm_ioremap_match(struct device *dev, void *res, void *match_data) |
12 | { |
13 | return *(void **)res == match_data; |
14 | } |
15 | |
16 | /** |
17 | * devm_ioremap - Managed ioremap() |
18 | * @dev: Generic device to remap IO address for |
19 | * @offset: BUS offset to map |
20 | * @size: Size of map |
21 | * |
22 | * Managed ioremap(). Map is automatically unmapped on driver detach. |
23 | */ |
24 | void __iomem *devm_ioremap(struct device *dev, resource_size_t offset, |
25 | unsigned long size) |
26 | { |
27 | void __iomem **ptr, *addr; |
28 | |
29 | ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL); |
30 | if (!ptr) |
31 | return NULL; |
32 | |
33 | addr = ioremap(offset, size); |
34 | if (addr) { |
35 | *ptr = addr; |
36 | devres_add(dev, ptr); |
37 | } else |
38 | devres_free(ptr); |
39 | |
40 | return addr; |
41 | } |
42 | EXPORT_SYMBOL(devm_ioremap); |
43 | |
44 | /** |
45 | * devm_ioremap_nocache - Managed ioremap_nocache() |
46 | * @dev: Generic device to remap IO address for |
47 | * @offset: BUS offset to map |
48 | * @size: Size of map |
49 | * |
50 | * Managed ioremap_nocache(). Map is automatically unmapped on driver |
51 | * detach. |
52 | */ |
53 | void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset, |
54 | unsigned long size) |
55 | { |
56 | void __iomem **ptr, *addr; |
57 | |
58 | ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL); |
59 | if (!ptr) |
60 | return NULL; |
61 | |
62 | addr = ioremap_nocache(offset, size); |
63 | if (addr) { |
64 | *ptr = addr; |
65 | devres_add(dev, ptr); |
66 | } else |
67 | devres_free(ptr); |
68 | |
69 | return addr; |
70 | } |
71 | EXPORT_SYMBOL(devm_ioremap_nocache); |
72 | |
73 | /** |
74 | * devm_iounmap - Managed iounmap() |
75 | * @dev: Generic device to unmap for |
76 | * @addr: Address to unmap |
77 | * |
78 | * Managed iounmap(). @addr must have been mapped using devm_ioremap*(). |
79 | */ |
80 | void devm_iounmap(struct device *dev, void __iomem *addr) |
81 | { |
82 | iounmap(addr); |
83 | WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match, |
84 | (void *)addr)); |
85 | } |
86 | EXPORT_SYMBOL(devm_iounmap); |
87 | |
88 | #ifdef CONFIG_HAS_IOPORT |
89 | /* |
90 | * Generic iomap devres |
91 | */ |
92 | static void devm_ioport_map_release(struct device *dev, void *res) |
93 | { |
94 | ioport_unmap(*(void __iomem **)res); |
95 | } |
96 | |
97 | static int devm_ioport_map_match(struct device *dev, void *res, |
98 | void *match_data) |
99 | { |
100 | return *(void **)res == match_data; |
101 | } |
102 | |
103 | /** |
104 | * devm_ioport_map - Managed ioport_map() |
105 | * @dev: Generic device to map ioport for |
106 | * @port: Port to map |
107 | * @nr: Number of ports to map |
108 | * |
109 | * Managed ioport_map(). Map is automatically unmapped on driver |
110 | * detach. |
111 | */ |
112 | void __iomem * devm_ioport_map(struct device *dev, unsigned long port, |
113 | unsigned int nr) |
114 | { |
115 | void __iomem **ptr, *addr; |
116 | |
117 | ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL); |
118 | if (!ptr) |
119 | return NULL; |
120 | |
121 | addr = ioport_map(port, nr); |
122 | if (addr) { |
123 | *ptr = addr; |
124 | devres_add(dev, ptr); |
125 | } else |
126 | devres_free(ptr); |
127 | |
128 | return addr; |
129 | } |
130 | EXPORT_SYMBOL(devm_ioport_map); |
131 | |
132 | /** |
133 | * devm_ioport_unmap - Managed ioport_unmap() |
134 | * @dev: Generic device to unmap for |
135 | * @addr: Address to unmap |
136 | * |
137 | * Managed ioport_unmap(). @addr must have been mapped using |
138 | * devm_ioport_map(). |
139 | */ |
140 | void devm_ioport_unmap(struct device *dev, void __iomem *addr) |
141 | { |
142 | ioport_unmap(addr); |
143 | WARN_ON(devres_destroy(dev, devm_ioport_map_release, |
144 | devm_ioport_map_match, (void *)addr)); |
145 | } |
146 | EXPORT_SYMBOL(devm_ioport_unmap); |
147 | |
148 | #ifdef CONFIG_PCI |
149 | /* |
150 | * PCI iomap devres |
151 | */ |
152 | #define PCIM_IOMAP_MAX PCI_ROM_RESOURCE |
153 | |
154 | struct pcim_iomap_devres { |
155 | void __iomem *table[PCIM_IOMAP_MAX]; |
156 | }; |
157 | |
158 | static void pcim_iomap_release(struct device *gendev, void *res) |
159 | { |
160 | struct pci_dev *dev = container_of(gendev, struct pci_dev, dev); |
161 | struct pcim_iomap_devres *this = res; |
162 | int i; |
163 | |
164 | for (i = 0; i < PCIM_IOMAP_MAX; i++) |
165 | if (this->table[i]) |
166 | pci_iounmap(dev, this->table[i]); |
167 | } |
168 | |
169 | /** |
170 | * pcim_iomap_table - access iomap allocation table |
171 | * @pdev: PCI device to access iomap table for |
172 | * |
173 | * Access iomap allocation table for @dev. If iomap table doesn't |
174 | * exist and @pdev is managed, it will be allocated. All iomaps |
175 | * recorded in the iomap table are automatically unmapped on driver |
176 | * detach. |
177 | * |
178 | * This function might sleep when the table is first allocated but can |
179 | * be safely called without context and guaranteed to succed once |
180 | * allocated. |
181 | */ |
182 | void __iomem * const * pcim_iomap_table(struct pci_dev *pdev) |
183 | { |
184 | struct pcim_iomap_devres *dr, *new_dr; |
185 | |
186 | dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL); |
187 | if (dr) |
188 | return dr->table; |
189 | |
190 | new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL); |
191 | if (!new_dr) |
192 | return NULL; |
193 | dr = devres_get(&pdev->dev, new_dr, NULL, NULL); |
194 | return dr->table; |
195 | } |
196 | EXPORT_SYMBOL(pcim_iomap_table); |
197 | |
198 | /** |
199 | * pcim_iomap - Managed pcim_iomap() |
200 | * @pdev: PCI device to iomap for |
201 | * @bar: BAR to iomap |
202 | * @maxlen: Maximum length of iomap |
203 | * |
204 | * Managed pci_iomap(). Map is automatically unmapped on driver |
205 | * detach. |
206 | */ |
207 | void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen) |
208 | { |
209 | void __iomem **tbl; |
210 | |
211 | BUG_ON(bar >= PCIM_IOMAP_MAX); |
212 | |
213 | tbl = (void __iomem **)pcim_iomap_table(pdev); |
214 | if (!tbl || tbl[bar]) /* duplicate mappings not allowed */ |
215 | return NULL; |
216 | |
217 | tbl[bar] = pci_iomap(pdev, bar, maxlen); |
218 | return tbl[bar]; |
219 | } |
220 | EXPORT_SYMBOL(pcim_iomap); |
221 | |
222 | /** |
223 | * pcim_iounmap - Managed pci_iounmap() |
224 | * @pdev: PCI device to iounmap for |
225 | * @addr: Address to unmap |
226 | * |
227 | * Managed pci_iounmap(). @addr must have been mapped using pcim_iomap(). |
228 | */ |
229 | void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr) |
230 | { |
231 | void __iomem **tbl; |
232 | int i; |
233 | |
234 | pci_iounmap(pdev, addr); |
235 | |
236 | tbl = (void __iomem **)pcim_iomap_table(pdev); |
237 | BUG_ON(!tbl); |
238 | |
239 | for (i = 0; i < PCIM_IOMAP_MAX; i++) |
240 | if (tbl[i] == addr) { |
241 | tbl[i] = NULL; |
242 | return; |
243 | } |
244 | WARN_ON(1); |
245 | } |
246 | EXPORT_SYMBOL(pcim_iounmap); |
247 | |
248 | /** |
249 | * pcim_iomap_regions - Request and iomap PCI BARs |
250 | * @pdev: PCI device to map IO resources for |
251 | * @mask: Mask of BARs to request and iomap |
252 | * @name: Name used when requesting regions |
253 | * |
254 | * Request and iomap regions specified by @mask. |
255 | */ |
256 | int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name) |
257 | { |
258 | void __iomem * const *iomap; |
259 | int i, rc; |
260 | |
261 | iomap = pcim_iomap_table(pdev); |
262 | if (!iomap) |
263 | return -ENOMEM; |
264 | |
265 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { |
266 | unsigned long len; |
267 | |
268 | if (!(mask & (1 << i))) |
269 | continue; |
270 | |
271 | rc = -EINVAL; |
272 | len = pci_resource_len(pdev, i); |
273 | if (!len) |
274 | goto err_inval; |
275 | |
276 | rc = pci_request_region(pdev, i, name); |
277 | if (rc) |
278 | goto err_inval; |
279 | |
280 | rc = -ENOMEM; |
281 | if (!pcim_iomap(pdev, i, 0)) |
282 | goto err_region; |
283 | } |
284 | |
285 | return 0; |
286 | |
287 | err_region: |
288 | pci_release_region(pdev, i); |
289 | err_inval: |
290 | while (--i >= 0) { |
291 | if (!(mask & (1 << i))) |
292 | continue; |
293 | pcim_iounmap(pdev, iomap[i]); |
294 | pci_release_region(pdev, i); |
295 | } |
296 | |
297 | return rc; |
298 | } |
299 | EXPORT_SYMBOL(pcim_iomap_regions); |
300 | |
301 | /** |
302 | * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones |
303 | * @pdev: PCI device to map IO resources for |
304 | * @mask: Mask of BARs to iomap |
305 | * @name: Name used when requesting regions |
306 | * |
307 | * Request all PCI BARs and iomap regions specified by @mask. |
308 | */ |
309 | int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask, |
310 | const char *name) |
311 | { |
312 | int request_mask = ((1 << 6) - 1) & ~mask; |
313 | int rc; |
314 | |
315 | rc = pci_request_selected_regions(pdev, request_mask, name); |
316 | if (rc) |
317 | return rc; |
318 | |
319 | rc = pcim_iomap_regions(pdev, mask, name); |
320 | if (rc) |
321 | pci_release_selected_regions(pdev, request_mask); |
322 | return rc; |
323 | } |
324 | EXPORT_SYMBOL(pcim_iomap_regions_request_all); |
325 | |
326 | /** |
327 | * pcim_iounmap_regions - Unmap and release PCI BARs |
328 | * @pdev: PCI device to map IO resources for |
329 | * @mask: Mask of BARs to unmap and release |
330 | * |
331 | * Unmap and release regions specified by @mask. |
332 | */ |
333 | void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask) |
334 | { |
335 | void __iomem * const *iomap; |
336 | int i; |
337 | |
338 | iomap = pcim_iomap_table(pdev); |
339 | if (!iomap) |
340 | return; |
341 | |
342 | for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) { |
343 | if (!(mask & (1 << i))) |
344 | continue; |
345 | |
346 | pcim_iounmap(pdev, iomap[i]); |
347 | pci_release_region(pdev, i); |
348 | } |
349 | } |
350 | EXPORT_SYMBOL(pcim_iounmap_regions); |
351 | #endif |
352 | #endif |
353 |
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