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-rw-r--r--lib/Kconfig9
-rw-r--r--lib/Makefile6
-rw-r--r--lib/devres.c300
-rw-r--r--lib/iomap.c296
4 files changed, 310 insertions, 301 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index 9b03581cdecb..384249915047 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -101,9 +101,14 @@ config TEXTSEARCH_FSM
101config PLIST 101config PLIST
102 boolean 102 boolean
103 103
104config IOMAP_COPY 104config HAS_IOMEM
105 boolean 105 boolean
106 depends on !UML 106 depends on !NO_IOMEM
107 default y
108
109config HAS_IOPORT
110 boolean
111 depends on HAS_IOMEM && !NO_IOPORT
107 default y 112 default y
108 113
109endmenu 114endmenu
diff --git a/lib/Makefile b/lib/Makefile
index b819e37440db..992a39ef9ffd 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -12,15 +12,15 @@ lib-$(CONFIG_SMP) += cpumask.o
12 12
13lib-y += kobject.o kref.o kobject_uevent.o klist.o 13lib-y += kobject.o kref.o kobject_uevent.o klist.o
14 14
15obj-y += sort.o parser.o halfmd4.o debug_locks.o random32.o iomap.o \ 15obj-y += sort.o parser.o halfmd4.o debug_locks.o random32.o bust_spinlocks.o
16 bust_spinlocks.o
17 16
18ifeq ($(CONFIG_DEBUG_KOBJECT),y) 17ifeq ($(CONFIG_DEBUG_KOBJECT),y)
19CFLAGS_kobject.o += -DDEBUG 18CFLAGS_kobject.o += -DDEBUG
20CFLAGS_kobject_uevent.o += -DDEBUG 19CFLAGS_kobject_uevent.o += -DDEBUG
21endif 20endif
22 21
23obj-$(CONFIG_IOMAP_COPY) += iomap_copy.o 22obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
23obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o
24obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o 24obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
25obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o 25obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o
26lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o 26lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
diff --git a/lib/devres.c b/lib/devres.c
new file mode 100644
index 000000000000..2a668dd7cac7
--- /dev/null
+++ b/lib/devres.c
@@ -0,0 +1,300 @@
1#include <linux/pci.h>
2#include <linux/io.h>
3#include <linux/module.h>
4
5static void devm_ioremap_release(struct device *dev, void *res)
6{
7 iounmap(*(void __iomem **)res);
8}
9
10static int devm_ioremap_match(struct device *dev, void *res, void *match_data)
11{
12 return *(void **)res == match_data;
13}
14
15/**
16 * devm_ioremap - Managed ioremap()
17 * @dev: Generic device to remap IO address for
18 * @offset: BUS offset to map
19 * @size: Size of map
20 *
21 * Managed ioremap(). Map is automatically unmapped on driver detach.
22 */
23void __iomem *devm_ioremap(struct device *dev, unsigned long offset,
24 unsigned long size)
25{
26 void __iomem **ptr, *addr;
27
28 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
29 if (!ptr)
30 return NULL;
31
32 addr = ioremap(offset, size);
33 if (addr) {
34 *ptr = addr;
35 devres_add(dev, ptr);
36 } else
37 devres_free(ptr);
38
39 return addr;
40}
41EXPORT_SYMBOL(devm_ioremap);
42
43/**
44 * devm_ioremap_nocache - Managed ioremap_nocache()
45 * @dev: Generic device to remap IO address for
46 * @offset: BUS offset to map
47 * @size: Size of map
48 *
49 * Managed ioremap_nocache(). Map is automatically unmapped on driver
50 * detach.
51 */
52void __iomem *devm_ioremap_nocache(struct device *dev, unsigned long offset,
53 unsigned long size)
54{
55 void __iomem **ptr, *addr;
56
57 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
58 if (!ptr)
59 return NULL;
60
61 addr = ioremap_nocache(offset, size);
62 if (addr) {
63 *ptr = addr;
64 devres_add(dev, ptr);
65 } else
66 devres_free(ptr);
67
68 return addr;
69}
70EXPORT_SYMBOL(devm_ioremap_nocache);
71
72/**
73 * devm_iounmap - Managed iounmap()
74 * @dev: Generic device to unmap for
75 * @addr: Address to unmap
76 *
77 * Managed iounmap(). @addr must have been mapped using devm_ioremap*().
78 */
79void devm_iounmap(struct device *dev, void __iomem *addr)
80{
81 iounmap(addr);
82 WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
83 (void *)addr));
84}
85EXPORT_SYMBOL(devm_iounmap);
86
87#ifdef CONFIG_HAS_IOPORT
88/*
89 * Generic iomap devres
90 */
91static void devm_ioport_map_release(struct device *dev, void *res)
92{
93 ioport_unmap(*(void __iomem **)res);
94}
95
96static int devm_ioport_map_match(struct device *dev, void *res,
97 void *match_data)
98{
99 return *(void **)res == match_data;
100}
101
102/**
103 * devm_ioport_map - Managed ioport_map()
104 * @dev: Generic device to map ioport for
105 * @port: Port to map
106 * @nr: Number of ports to map
107 *
108 * Managed ioport_map(). Map is automatically unmapped on driver
109 * detach.
110 */
111void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
112 unsigned int nr)
113{
114 void __iomem **ptr, *addr;
115
116 ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
117 if (!ptr)
118 return NULL;
119
120 addr = ioport_map(port, nr);
121 if (addr) {
122 *ptr = addr;
123 devres_add(dev, ptr);
124 } else
125 devres_free(ptr);
126
127 return addr;
128}
129EXPORT_SYMBOL(devm_ioport_map);
130
131/**
132 * devm_ioport_unmap - Managed ioport_unmap()
133 * @dev: Generic device to unmap for
134 * @addr: Address to unmap
135 *
136 * Managed ioport_unmap(). @addr must have been mapped using
137 * devm_ioport_map().
138 */
139void devm_ioport_unmap(struct device *dev, void __iomem *addr)
140{
141 ioport_unmap(addr);
142 WARN_ON(devres_destroy(dev, devm_ioport_map_release,
143 devm_ioport_map_match, (void *)addr));
144}
145EXPORT_SYMBOL(devm_ioport_unmap);
146
147#ifdef CONFIG_PCI
148/*
149 * PCI iomap devres
150 */
151#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
152
153struct pcim_iomap_devres {
154 void __iomem *table[PCIM_IOMAP_MAX];
155};
156
157static void pcim_iomap_release(struct device *gendev, void *res)
158{
159 struct pci_dev *dev = container_of(gendev, struct pci_dev, dev);
160 struct pcim_iomap_devres *this = res;
161 int i;
162
163 for (i = 0; i < PCIM_IOMAP_MAX; i++)
164 if (this->table[i])
165 pci_iounmap(dev, this->table[i]);
166}
167
168/**
169 * pcim_iomap_table - access iomap allocation table
170 * @pdev: PCI device to access iomap table for
171 *
172 * Access iomap allocation table for @dev. If iomap table doesn't
173 * exist and @pdev is managed, it will be allocated. All iomaps
174 * recorded in the iomap table are automatically unmapped on driver
175 * detach.
176 *
177 * This function might sleep when the table is first allocated but can
178 * be safely called without context and guaranteed to succed once
179 * allocated.
180 */
181void __iomem * const * pcim_iomap_table(struct pci_dev *pdev)
182{
183 struct pcim_iomap_devres *dr, *new_dr;
184
185 dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
186 if (dr)
187 return dr->table;
188
189 new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
190 if (!new_dr)
191 return NULL;
192 dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
193 return dr->table;
194}
195EXPORT_SYMBOL(pcim_iomap_table);
196
197/**
198 * pcim_iomap - Managed pcim_iomap()
199 * @pdev: PCI device to iomap for
200 * @bar: BAR to iomap
201 * @maxlen: Maximum length of iomap
202 *
203 * Managed pci_iomap(). Map is automatically unmapped on driver
204 * detach.
205 */
206void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
207{
208 void __iomem **tbl;
209
210 BUG_ON(bar >= PCIM_IOMAP_MAX);
211
212 tbl = (void __iomem **)pcim_iomap_table(pdev);
213 if (!tbl || tbl[bar]) /* duplicate mappings not allowed */
214 return NULL;
215
216 tbl[bar] = pci_iomap(pdev, bar, maxlen);
217 return tbl[bar];
218}
219EXPORT_SYMBOL(pcim_iomap);
220
221/**
222 * pcim_iounmap - Managed pci_iounmap()
223 * @pdev: PCI device to iounmap for
224 * @addr: Address to unmap
225 *
226 * Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
227 */
228void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
229{
230 void __iomem **tbl;
231 int i;
232
233 pci_iounmap(pdev, addr);
234
235 tbl = (void __iomem **)pcim_iomap_table(pdev);
236 BUG_ON(!tbl);
237
238 for (i = 0; i < PCIM_IOMAP_MAX; i++)
239 if (tbl[i] == addr) {
240 tbl[i] = NULL;
241 return;
242 }
243 WARN_ON(1);
244}
245EXPORT_SYMBOL(pcim_iounmap);
246
247/**
248 * pcim_iomap_regions - Request and iomap PCI BARs
249 * @pdev: PCI device to map IO resources for
250 * @mask: Mask of BARs to request and iomap
251 * @name: Name used when requesting regions
252 *
253 * Request and iomap regions specified by @mask.
254 */
255int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name)
256{
257 void __iomem * const *iomap;
258 int i, rc;
259
260 iomap = pcim_iomap_table(pdev);
261 if (!iomap)
262 return -ENOMEM;
263
264 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
265 unsigned long len;
266
267 if (!(mask & (1 << i)))
268 continue;
269
270 rc = -EINVAL;
271 len = pci_resource_len(pdev, i);
272 if (!len)
273 goto err_inval;
274
275 rc = pci_request_region(pdev, i, name);
276 if (rc)
277 goto err_region;
278
279 rc = -ENOMEM;
280 if (!pcim_iomap(pdev, i, 0))
281 goto err_iomap;
282 }
283
284 return 0;
285
286 err_iomap:
287 pcim_iounmap(pdev, iomap[i]);
288 err_region:
289 pci_release_region(pdev, i);
290 err_inval:
291 while (--i >= 0) {
292 pcim_iounmap(pdev, iomap[i]);
293 pci_release_region(pdev, i);
294 }
295
296 return rc;
297}
298EXPORT_SYMBOL(pcim_iomap_regions);
299#endif
300#endif
diff --git a/lib/iomap.c b/lib/iomap.c
index 4990c736bc4b..4d43f37c0154 100644
--- a/lib/iomap.c
+++ b/lib/iomap.c
@@ -6,7 +6,6 @@
6#include <linux/pci.h> 6#include <linux/pci.h>
7#include <linux/io.h> 7#include <linux/io.h>
8 8
9#ifdef CONFIG_GENERIC_IOMAP
10#include <linux/module.h> 9#include <linux/module.h>
11 10
12/* 11/*
@@ -256,298 +255,3 @@ void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
256} 255}
257EXPORT_SYMBOL(pci_iomap); 256EXPORT_SYMBOL(pci_iomap);
258EXPORT_SYMBOL(pci_iounmap); 257EXPORT_SYMBOL(pci_iounmap);
259
260#endif /* CONFIG_GENERIC_IOMAP */
261
262/*
263 * Generic iomap devres
264 */
265static void devm_ioport_map_release(struct device *dev, void *res)
266{
267 ioport_unmap(*(void __iomem **)res);
268}
269
270static int devm_ioport_map_match(struct device *dev, void *res,
271 void *match_data)
272{
273 return *(void **)res == match_data;
274}
275
276/**
277 * devm_ioport_map - Managed ioport_map()
278 * @dev: Generic device to map ioport for
279 * @port: Port to map
280 * @nr: Number of ports to map
281 *
282 * Managed ioport_map(). Map is automatically unmapped on driver
283 * detach.
284 */
285void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
286 unsigned int nr)
287{
288 void __iomem **ptr, *addr;
289
290 ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
291 if (!ptr)
292 return NULL;
293
294 addr = ioport_map(port, nr);
295 if (addr) {
296 *ptr = addr;
297 devres_add(dev, ptr);
298 } else
299 devres_free(ptr);
300
301 return addr;
302}
303EXPORT_SYMBOL(devm_ioport_map);
304
305/**
306 * devm_ioport_unmap - Managed ioport_unmap()
307 * @dev: Generic device to unmap for
308 * @addr: Address to unmap
309 *
310 * Managed ioport_unmap(). @addr must have been mapped using
311 * devm_ioport_map().
312 */
313void devm_ioport_unmap(struct device *dev, void __iomem *addr)
314{
315 ioport_unmap(addr);
316 WARN_ON(devres_destroy(dev, devm_ioport_map_release,
317 devm_ioport_map_match, (void *)addr));
318}
319EXPORT_SYMBOL(devm_ioport_unmap);
320
321static void devm_ioremap_release(struct device *dev, void *res)
322{
323 iounmap(*(void __iomem **)res);
324}
325
326static int devm_ioremap_match(struct device *dev, void *res, void *match_data)
327{
328 return *(void **)res == match_data;
329}
330
331/**
332 * devm_ioremap - Managed ioremap()
333 * @dev: Generic device to remap IO address for
334 * @offset: BUS offset to map
335 * @size: Size of map
336 *
337 * Managed ioremap(). Map is automatically unmapped on driver detach.
338 */
339void __iomem *devm_ioremap(struct device *dev, unsigned long offset,
340 unsigned long size)
341{
342 void __iomem **ptr, *addr;
343
344 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
345 if (!ptr)
346 return NULL;
347
348 addr = ioremap(offset, size);
349 if (addr) {
350 *ptr = addr;
351 devres_add(dev, ptr);
352 } else
353 devres_free(ptr);
354
355 return addr;
356}
357EXPORT_SYMBOL(devm_ioremap);
358
359/**
360 * devm_ioremap_nocache - Managed ioremap_nocache()
361 * @dev: Generic device to remap IO address for
362 * @offset: BUS offset to map
363 * @size: Size of map
364 *
365 * Managed ioremap_nocache(). Map is automatically unmapped on driver
366 * detach.
367 */
368void __iomem *devm_ioremap_nocache(struct device *dev, unsigned long offset,
369 unsigned long size)
370{
371 void __iomem **ptr, *addr;
372
373 ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
374 if (!ptr)
375 return NULL;
376
377 addr = ioremap_nocache(offset, size);
378 if (addr) {
379 *ptr = addr;
380 devres_add(dev, ptr);
381 } else
382 devres_free(ptr);
383
384 return addr;
385}
386EXPORT_SYMBOL(devm_ioremap_nocache);
387
388/**
389 * devm_iounmap - Managed iounmap()
390 * @dev: Generic device to unmap for
391 * @addr: Address to unmap
392 *
393 * Managed iounmap(). @addr must have been mapped using devm_ioremap*().
394 */
395void devm_iounmap(struct device *dev, void __iomem *addr)
396{
397 iounmap(addr);
398 WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
399 (void *)addr));
400}
401EXPORT_SYMBOL(devm_iounmap);
402
403/*
404 * PCI iomap devres
405 */
406#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
407
408struct pcim_iomap_devres {
409 void __iomem *table[PCIM_IOMAP_MAX];
410};
411
412static void pcim_iomap_release(struct device *gendev, void *res)
413{
414 struct pci_dev *dev = container_of(gendev, struct pci_dev, dev);
415 struct pcim_iomap_devres *this = res;
416 int i;
417
418 for (i = 0; i < PCIM_IOMAP_MAX; i++)
419 if (this->table[i])
420 pci_iounmap(dev, this->table[i]);
421}
422
423/**
424 * pcim_iomap_table - access iomap allocation table
425 * @pdev: PCI device to access iomap table for
426 *
427 * Access iomap allocation table for @dev. If iomap table doesn't
428 * exist and @pdev is managed, it will be allocated. All iomaps
429 * recorded in the iomap table are automatically unmapped on driver
430 * detach.
431 *
432 * This function might sleep when the table is first allocated but can
433 * be safely called without context and guaranteed to succed once
434 * allocated.
435 */
436void __iomem * const * pcim_iomap_table(struct pci_dev *pdev)
437{
438 struct pcim_iomap_devres *dr, *new_dr;
439
440 dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
441 if (dr)
442 return dr->table;
443
444 new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
445 if (!new_dr)
446 return NULL;
447 dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
448 return dr->table;
449}
450EXPORT_SYMBOL(pcim_iomap_table);
451
452/**
453 * pcim_iomap - Managed pcim_iomap()
454 * @pdev: PCI device to iomap for
455 * @bar: BAR to iomap
456 * @maxlen: Maximum length of iomap
457 *
458 * Managed pci_iomap(). Map is automatically unmapped on driver
459 * detach.
460 */
461void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
462{
463 void __iomem **tbl;
464
465 BUG_ON(bar >= PCIM_IOMAP_MAX);
466
467 tbl = (void __iomem **)pcim_iomap_table(pdev);
468 if (!tbl || tbl[bar]) /* duplicate mappings not allowed */
469 return NULL;
470
471 tbl[bar] = pci_iomap(pdev, bar, maxlen);
472 return tbl[bar];
473}
474EXPORT_SYMBOL(pcim_iomap);
475
476/**
477 * pcim_iounmap - Managed pci_iounmap()
478 * @pdev: PCI device to iounmap for
479 * @addr: Address to unmap
480 *
481 * Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
482 */
483void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
484{
485 void __iomem **tbl;
486 int i;
487
488 pci_iounmap(pdev, addr);
489
490 tbl = (void __iomem **)pcim_iomap_table(pdev);
491 BUG_ON(!tbl);
492
493 for (i = 0; i < PCIM_IOMAP_MAX; i++)
494 if (tbl[i] == addr) {
495 tbl[i] = NULL;
496 return;
497 }
498 WARN_ON(1);
499}
500EXPORT_SYMBOL(pcim_iounmap);
501
502/**
503 * pcim_iomap_regions - Request and iomap PCI BARs
504 * @pdev: PCI device to map IO resources for
505 * @mask: Mask of BARs to request and iomap
506 * @name: Name used when requesting regions
507 *
508 * Request and iomap regions specified by @mask.
509 */
510int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name)
511{
512 void __iomem * const *iomap;
513 int i, rc;
514
515 iomap = pcim_iomap_table(pdev);
516 if (!iomap)
517 return -ENOMEM;
518
519 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
520 unsigned long len;
521
522 if (!(mask & (1 << i)))
523 continue;
524
525 rc = -EINVAL;
526 len = pci_resource_len(pdev, i);
527 if (!len)
528 goto err_inval;
529
530 rc = pci_request_region(pdev, i, name);
531 if (rc)
532 goto err_region;
533
534 rc = -ENOMEM;
535 if (!pcim_iomap(pdev, i, 0))
536 goto err_iomap;
537 }
538
539 return 0;
540
541 err_iomap:
542 pcim_iounmap(pdev, iomap[i]);
543 err_region:
544 pci_release_region(pdev, i);
545 err_inval:
546 while (--i >= 0) {
547 pcim_iounmap(pdev, iomap[i]);
548 pci_release_region(pdev, i);
549 }
550
551 return rc;
552}
553EXPORT_SYMBOL(pcim_iomap_regions);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-11 05:28:46 -0500