1#include <linux/err.h>
  2#include <linux/pci.h>
  3#include <linux/io.h>
  4#include <linux/gfp.h>
  5#include <linux/export.h>
  6
  7void devm_ioremap_release(struct device *dev, void *res)
  8{
  9	iounmap(*(void __iomem **)res);
 10}
 11
 12static int devm_ioremap_match(struct device *dev, void *res, void *match_data)
 13{
 14	return *(void **)res == match_data;
 15}
 16
 17/**
 18 * devm_ioremap - Managed ioremap()
 19 * @dev: Generic device to remap IO address for
 20 * @offset: BUS offset to map
 21 * @size: Size of map
 22 *
 23 * Managed ioremap().  Map is automatically unmapped on driver detach.
 24 */
 25void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
 26			   resource_size_t size)
 27{
 28	void __iomem **ptr, *addr;
 29
 30	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
 31	if (!ptr)
 32		return NULL;
 33
 34	addr = ioremap(offset, size);
 35	if (addr) {
 36		*ptr = addr;
 37		devres_add(dev, ptr);
 38	} else
 39		devres_free(ptr);
 40
 41	return addr;
 42}
 43EXPORT_SYMBOL(devm_ioremap);
 44
 45/**
 46 * devm_ioremap_nocache - Managed ioremap_nocache()
 47 * @dev: Generic device to remap IO address for
 48 * @offset: BUS offset to map
 49 * @size: Size of map
 50 *
 51 * Managed ioremap_nocache().  Map is automatically unmapped on driver
 52 * detach.
 53 */
 54void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
 55				   resource_size_t size)
 56{
 57	void __iomem **ptr, *addr;
 58
 59	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
 60	if (!ptr)
 61		return NULL;
 62
 63	addr = ioremap_nocache(offset, size);
 64	if (addr) {
 65		*ptr = addr;
 66		devres_add(dev, ptr);
 67	} else
 68		devres_free(ptr);
 69
 70	return addr;
 71}
 72EXPORT_SYMBOL(devm_ioremap_nocache);
 73
 74/**
 75 * devm_ioremap_wc - Managed ioremap_wc()
 76 * @dev: Generic device to remap IO address for
 77 * @offset: BUS offset to map
 78 * @size: Size of map
 79 *
 80 * Managed ioremap_wc().  Map is automatically unmapped on driver detach.
 81 */
 82void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
 83			      resource_size_t size)
 84{
 85	void __iomem **ptr, *addr;
 86
 87	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
 88	if (!ptr)
 89		return NULL;
 90
 91	addr = ioremap_wc(offset, size);
 92	if (addr) {
 93		*ptr = addr;
 94		devres_add(dev, ptr);
 95	} else
 96		devres_free(ptr);
 97
 98	return addr;
 99}
100EXPORT_SYMBOL(devm_ioremap_wc);
101
102/**
103 * devm_iounmap - Managed iounmap()
104 * @dev: Generic device to unmap for
105 * @addr: Address to unmap
106 *
107 * Managed iounmap().  @addr must have been mapped using devm_ioremap*().
108 */
109void devm_iounmap(struct device *dev, void __iomem *addr)
110{
111	WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
112			       (__force void *)addr));
113	iounmap(addr);
114}
115EXPORT_SYMBOL(devm_iounmap);
116
117/**
118 * devm_ioremap_resource() - check, request region, and ioremap resource
119 * @dev: generic device to handle the resource for
120 * @res: resource to be handled
121 *
122 * Checks that a resource is a valid memory region, requests the memory
123 * region and ioremaps it. All operations are managed and will be undone
124 * on driver detach.
125 *
126 * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
127 * on failure. Usage example:
128 *
129 *	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
130 *	base = devm_ioremap_resource(&pdev->dev, res);
131 *	if (IS_ERR(base))
132 *		return PTR_ERR(base);
133 */
134void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res)
 
135{
136	resource_size_t size;
137	const char *name;
138	void __iomem *dest_ptr;
139
140	BUG_ON(!dev);
141
142	if (!res || resource_type(res) != IORESOURCE_MEM) {
143		dev_err(dev, "invalid resource\n");
144		return IOMEM_ERR_PTR(-EINVAL);
145	}
146
147	size = resource_size(res);
148	name = res->name ?: dev_name(dev);
149
150	if (!devm_request_mem_region(dev, res->start, size, name)) {
151		dev_err(dev, "can't request region for resource %pR\n", res);
152		return IOMEM_ERR_PTR(-EBUSY);
153	}
154
155	dest_ptr = devm_ioremap(dev, res->start, size);
 
 
 
 
156	if (!dest_ptr) {
157		dev_err(dev, "ioremap failed for resource %pR\n", res);
158		devm_release_mem_region(dev, res->start, size);
159		dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
160	}
161
162	return dest_ptr;
163}
164EXPORT_SYMBOL(devm_ioremap_resource);
165
166#ifdef CONFIG_HAS_IOPORT_MAP
167/*
168 * Generic iomap devres
169 */
170static void devm_ioport_map_release(struct device *dev, void *res)
171{
172	ioport_unmap(*(void __iomem **)res);
173}
174
175static int devm_ioport_map_match(struct device *dev, void *res,
176				 void *match_data)
177{
178	return *(void **)res == match_data;
179}
180
181/**
182 * devm_ioport_map - Managed ioport_map()
183 * @dev: Generic device to map ioport for
184 * @port: Port to map
185 * @nr: Number of ports to map
186 *
187 * Managed ioport_map().  Map is automatically unmapped on driver
188 * detach.
189 */
190void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
191			       unsigned int nr)
192{
193	void __iomem **ptr, *addr;
194
195	ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
196	if (!ptr)
197		return NULL;
198
199	addr = ioport_map(port, nr);
200	if (addr) {
201		*ptr = addr;
202		devres_add(dev, ptr);
203	} else
204		devres_free(ptr);
205
206	return addr;
207}
208EXPORT_SYMBOL(devm_ioport_map);
209
210/**
211 * devm_ioport_unmap - Managed ioport_unmap()
212 * @dev: Generic device to unmap for
213 * @addr: Address to unmap
214 *
215 * Managed ioport_unmap().  @addr must have been mapped using
216 * devm_ioport_map().
217 */
218void devm_ioport_unmap(struct device *dev, void __iomem *addr)
219{
220	ioport_unmap(addr);
221	WARN_ON(devres_destroy(dev, devm_ioport_map_release,
222			       devm_ioport_map_match, (__force void *)addr));
223}
224EXPORT_SYMBOL(devm_ioport_unmap);
225#endif /* CONFIG_HAS_IOPORT_MAP */
226
227#ifdef CONFIG_PCI
228/*
229 * PCI iomap devres
230 */
231#define PCIM_IOMAP_MAX	PCI_ROM_RESOURCE
232
233struct pcim_iomap_devres {
234	void __iomem *table[PCIM_IOMAP_MAX];
235};
236
237static void pcim_iomap_release(struct device *gendev, void *res)
238{
239	struct pci_dev *dev = to_pci_dev(gendev);
240	struct pcim_iomap_devres *this = res;
241	int i;
242
243	for (i = 0; i < PCIM_IOMAP_MAX; i++)
244		if (this->table[i])
245			pci_iounmap(dev, this->table[i]);
246}
247
248/**
249 * pcim_iomap_table - access iomap allocation table
250 * @pdev: PCI device to access iomap table for
251 *
252 * Access iomap allocation table for @dev.  If iomap table doesn't
253 * exist and @pdev is managed, it will be allocated.  All iomaps
254 * recorded in the iomap table are automatically unmapped on driver
255 * detach.
256 *
257 * This function might sleep when the table is first allocated but can
258 * be safely called without context and guaranteed to succed once
259 * allocated.
260 */
261void __iomem * const *pcim_iomap_table(struct pci_dev *pdev)
262{
263	struct pcim_iomap_devres *dr, *new_dr;
264
265	dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
266	if (dr)
267		return dr->table;
268
269	new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
270	if (!new_dr)
271		return NULL;
272	dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
273	return dr->table;
274}
275EXPORT_SYMBOL(pcim_iomap_table);
276
277/**
278 * pcim_iomap - Managed pcim_iomap()
279 * @pdev: PCI device to iomap for
280 * @bar: BAR to iomap
281 * @maxlen: Maximum length of iomap
282 *
283 * Managed pci_iomap().  Map is automatically unmapped on driver
284 * detach.
285 */
286void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
287{
288	void __iomem **tbl;
289
290	BUG_ON(bar >= PCIM_IOMAP_MAX);
291
292	tbl = (void __iomem **)pcim_iomap_table(pdev);
293	if (!tbl || tbl[bar])	/* duplicate mappings not allowed */
294		return NULL;
295
296	tbl[bar] = pci_iomap(pdev, bar, maxlen);
297	return tbl[bar];
298}
299EXPORT_SYMBOL(pcim_iomap);
300
301/**
302 * pcim_iounmap - Managed pci_iounmap()
303 * @pdev: PCI device to iounmap for
304 * @addr: Address to unmap
305 *
306 * Managed pci_iounmap().  @addr must have been mapped using pcim_iomap().
307 */
308void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
309{
310	void __iomem **tbl;
311	int i;
312
313	pci_iounmap(pdev, addr);
314
315	tbl = (void __iomem **)pcim_iomap_table(pdev);
316	BUG_ON(!tbl);
317
318	for (i = 0; i < PCIM_IOMAP_MAX; i++)
319		if (tbl[i] == addr) {
320			tbl[i] = NULL;
321			return;
322		}
323	WARN_ON(1);
324}
325EXPORT_SYMBOL(pcim_iounmap);
326
327/**
328 * pcim_iomap_regions - Request and iomap PCI BARs
329 * @pdev: PCI device to map IO resources for
330 * @mask: Mask of BARs to request and iomap
331 * @name: Name used when requesting regions
332 *
333 * Request and iomap regions specified by @mask.
334 */
335int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name)
336{
337	void __iomem * const *iomap;
338	int i, rc;
339
340	iomap = pcim_iomap_table(pdev);
341	if (!iomap)
342		return -ENOMEM;
343
344	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
345		unsigned long len;
346
347		if (!(mask & (1 << i)))
348			continue;
349
350		rc = -EINVAL;
351		len = pci_resource_len(pdev, i);
352		if (!len)
353			goto err_inval;
354
355		rc = pci_request_region(pdev, i, name);
356		if (rc)
357			goto err_inval;
358
359		rc = -ENOMEM;
360		if (!pcim_iomap(pdev, i, 0))
361			goto err_region;
362	}
363
364	return 0;
365
366 err_region:
367	pci_release_region(pdev, i);
368 err_inval:
369	while (--i >= 0) {
370		if (!(mask & (1 << i)))
371			continue;
372		pcim_iounmap(pdev, iomap[i]);
373		pci_release_region(pdev, i);
374	}
375
376	return rc;
377}
378EXPORT_SYMBOL(pcim_iomap_regions);
379
380/**
381 * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
382 * @pdev: PCI device to map IO resources for
383 * @mask: Mask of BARs to iomap
384 * @name: Name used when requesting regions
385 *
386 * Request all PCI BARs and iomap regions specified by @mask.
387 */
388int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
389				   const char *name)
390{
391	int request_mask = ((1 << 6) - 1) & ~mask;
392	int rc;
393
394	rc = pci_request_selected_regions(pdev, request_mask, name);
395	if (rc)
396		return rc;
397
398	rc = pcim_iomap_regions(pdev, mask, name);
399	if (rc)
400		pci_release_selected_regions(pdev, request_mask);
401	return rc;
402}
403EXPORT_SYMBOL(pcim_iomap_regions_request_all);
404
405/**
406 * pcim_iounmap_regions - Unmap and release PCI BARs
407 * @pdev: PCI device to map IO resources for
408 * @mask: Mask of BARs to unmap and release
409 *
410 * Unmap and release regions specified by @mask.
411 */
412void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
413{
414	void __iomem * const *iomap;
415	int i;
416
417	iomap = pcim_iomap_table(pdev);
418	if (!iomap)
419		return;
420
421	for (i = 0; i < PCIM_IOMAP_MAX; i++) {
422		if (!(mask & (1 << i)))
423			continue;
424
425		pcim_iounmap(pdev, iomap[i]);
426		pci_release_region(pdev, i);
427	}
428}
429EXPORT_SYMBOL(pcim_iounmap_regions);
430#endif /* CONFIG_PCI */

 
  1#include <linux/pci.h>
  2#include <linux/io.h>
  3#include <linux/gfp.h>
  4#include <linux/export.h>
  5
  6void devm_ioremap_release(struct device *dev, void *res)
  7{
  8	iounmap(*(void __iomem **)res);
  9}
 10
 11static 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 */
 24void __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}
 42EXPORT_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 */
 53void __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}
 71EXPORT_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 */
 80void devm_iounmap(struct device *dev, void __iomem *addr)
 81{
 82	WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
 83			       (void *)addr));
 84	iounmap(addr);
 85}
 86EXPORT_SYMBOL(devm_iounmap);
 87
 88/**
 89 * devm_request_and_ioremap() - Check, request region, and ioremap resource
 90 * @dev: Generic device to handle the resource for
 91 * @res: resource to be handled
 92 *
 93 * Takes all necessary steps to ioremap a mem resource. Uses managed device, so
 94 * everything is undone on driver detach. Checks arguments, so you can feed
 95 * it the result from e.g. platform_get_resource() directly. Returns the
 96 * remapped pointer or NULL on error. Usage example:
 
 
 97 *
 98 *	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 99 *	base = devm_request_and_ioremap(&pdev->dev, res);
100 *	if (!base)
101 *		return -EADDRNOTAVAIL;
102 */
103void __iomem *devm_request_and_ioremap(struct device *dev,
104			struct resource *res)
105{
106	resource_size_t size;
107	const char *name;
108	void __iomem *dest_ptr;
109
110	BUG_ON(!dev);
111
112	if (!res || resource_type(res) != IORESOURCE_MEM) {
113		dev_err(dev, "invalid resource\n");
114		return NULL;
115	}
116
117	size = resource_size(res);
118	name = res->name ?: dev_name(dev);
119
120	if (!devm_request_mem_region(dev, res->start, size, name)) {
121		dev_err(dev, "can't request region for resource %pR\n", res);
122		return NULL;
123	}
124
125	if (res->flags & IORESOURCE_CACHEABLE)
126		dest_ptr = devm_ioremap(dev, res->start, size);
127	else
128		dest_ptr = devm_ioremap_nocache(dev, res->start, size);
129
130	if (!dest_ptr) {
131		dev_err(dev, "ioremap failed for resource %pR\n", res);
132		devm_release_mem_region(dev, res->start, size);
 
133	}
134
135	return dest_ptr;
136}
137EXPORT_SYMBOL(devm_request_and_ioremap);
138
139#ifdef CONFIG_HAS_IOPORT
140/*
141 * Generic iomap devres
142 */
143static void devm_ioport_map_release(struct device *dev, void *res)
144{
145	ioport_unmap(*(void __iomem **)res);
146}
147
148static int devm_ioport_map_match(struct device *dev, void *res,
149				 void *match_data)
150{
151	return *(void **)res == match_data;
152}
153
154/**
155 * devm_ioport_map - Managed ioport_map()
156 * @dev: Generic device to map ioport for
157 * @port: Port to map
158 * @nr: Number of ports to map
159 *
160 * Managed ioport_map().  Map is automatically unmapped on driver
161 * detach.
162 */
163void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
164			       unsigned int nr)
165{
166	void __iomem **ptr, *addr;
167
168	ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
169	if (!ptr)
170		return NULL;
171
172	addr = ioport_map(port, nr);
173	if (addr) {
174		*ptr = addr;
175		devres_add(dev, ptr);
176	} else
177		devres_free(ptr);
178
179	return addr;
180}
181EXPORT_SYMBOL(devm_ioport_map);
182
183/**
184 * devm_ioport_unmap - Managed ioport_unmap()
185 * @dev: Generic device to unmap for
186 * @addr: Address to unmap
187 *
188 * Managed ioport_unmap().  @addr must have been mapped using
189 * devm_ioport_map().
190 */
191void devm_ioport_unmap(struct device *dev, void __iomem *addr)
192{
193	ioport_unmap(addr);
194	WARN_ON(devres_destroy(dev, devm_ioport_map_release,
195			       devm_ioport_map_match, (void *)addr));
196}
197EXPORT_SYMBOL(devm_ioport_unmap);
 
198
199#ifdef CONFIG_PCI
200/*
201 * PCI iomap devres
202 */
203#define PCIM_IOMAP_MAX	PCI_ROM_RESOURCE
204
205struct pcim_iomap_devres {
206	void __iomem *table[PCIM_IOMAP_MAX];
207};
208
209static void pcim_iomap_release(struct device *gendev, void *res)
210{
211	struct pci_dev *dev = container_of(gendev, struct pci_dev, dev);
212	struct pcim_iomap_devres *this = res;
213	int i;
214
215	for (i = 0; i < PCIM_IOMAP_MAX; i++)
216		if (this->table[i])
217			pci_iounmap(dev, this->table[i]);
218}
219
220/**
221 * pcim_iomap_table - access iomap allocation table
222 * @pdev: PCI device to access iomap table for
223 *
224 * Access iomap allocation table for @dev.  If iomap table doesn't
225 * exist and @pdev is managed, it will be allocated.  All iomaps
226 * recorded in the iomap table are automatically unmapped on driver
227 * detach.
228 *
229 * This function might sleep when the table is first allocated but can
230 * be safely called without context and guaranteed to succed once
231 * allocated.
232 */
233void __iomem * const * pcim_iomap_table(struct pci_dev *pdev)
234{
235	struct pcim_iomap_devres *dr, *new_dr;
236
237	dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
238	if (dr)
239		return dr->table;
240
241	new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
242	if (!new_dr)
243		return NULL;
244	dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
245	return dr->table;
246}
247EXPORT_SYMBOL(pcim_iomap_table);
248
249/**
250 * pcim_iomap - Managed pcim_iomap()
251 * @pdev: PCI device to iomap for
252 * @bar: BAR to iomap
253 * @maxlen: Maximum length of iomap
254 *
255 * Managed pci_iomap().  Map is automatically unmapped on driver
256 * detach.
257 */
258void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
259{
260	void __iomem **tbl;
261
262	BUG_ON(bar >= PCIM_IOMAP_MAX);
263
264	tbl = (void __iomem **)pcim_iomap_table(pdev);
265	if (!tbl || tbl[bar])	/* duplicate mappings not allowed */
266		return NULL;
267
268	tbl[bar] = pci_iomap(pdev, bar, maxlen);
269	return tbl[bar];
270}
271EXPORT_SYMBOL(pcim_iomap);
272
273/**
274 * pcim_iounmap - Managed pci_iounmap()
275 * @pdev: PCI device to iounmap for
276 * @addr: Address to unmap
277 *
278 * Managed pci_iounmap().  @addr must have been mapped using pcim_iomap().
279 */
280void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
281{
282	void __iomem **tbl;
283	int i;
284
285	pci_iounmap(pdev, addr);
286
287	tbl = (void __iomem **)pcim_iomap_table(pdev);
288	BUG_ON(!tbl);
289
290	for (i = 0; i < PCIM_IOMAP_MAX; i++)
291		if (tbl[i] == addr) {
292			tbl[i] = NULL;
293			return;
294		}
295	WARN_ON(1);
296}
297EXPORT_SYMBOL(pcim_iounmap);
298
299/**
300 * pcim_iomap_regions - Request and iomap PCI BARs
301 * @pdev: PCI device to map IO resources for
302 * @mask: Mask of BARs to request and iomap
303 * @name: Name used when requesting regions
304 *
305 * Request and iomap regions specified by @mask.
306 */
307int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name)
308{
309	void __iomem * const *iomap;
310	int i, rc;
311
312	iomap = pcim_iomap_table(pdev);
313	if (!iomap)
314		return -ENOMEM;
315
316	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
317		unsigned long len;
318
319		if (!(mask & (1 << i)))
320			continue;
321
322		rc = -EINVAL;
323		len = pci_resource_len(pdev, i);
324		if (!len)
325			goto err_inval;
326
327		rc = pci_request_region(pdev, i, name);
328		if (rc)
329			goto err_inval;
330
331		rc = -ENOMEM;
332		if (!pcim_iomap(pdev, i, 0))
333			goto err_region;
334	}
335
336	return 0;
337
338 err_region:
339	pci_release_region(pdev, i);
340 err_inval:
341	while (--i >= 0) {
342		if (!(mask & (1 << i)))
343			continue;
344		pcim_iounmap(pdev, iomap[i]);
345		pci_release_region(pdev, i);
346	}
347
348	return rc;
349}
350EXPORT_SYMBOL(pcim_iomap_regions);
351
352/**
353 * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
354 * @pdev: PCI device to map IO resources for
355 * @mask: Mask of BARs to iomap
356 * @name: Name used when requesting regions
357 *
358 * Request all PCI BARs and iomap regions specified by @mask.
359 */
360int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
361				   const char *name)
362{
363	int request_mask = ((1 << 6) - 1) & ~mask;
364	int rc;
365
366	rc = pci_request_selected_regions(pdev, request_mask, name);
367	if (rc)
368		return rc;
369
370	rc = pcim_iomap_regions(pdev, mask, name);
371	if (rc)
372		pci_release_selected_regions(pdev, request_mask);
373	return rc;
374}
375EXPORT_SYMBOL(pcim_iomap_regions_request_all);
376
377/**
378 * pcim_iounmap_regions - Unmap and release PCI BARs
379 * @pdev: PCI device to map IO resources for
380 * @mask: Mask of BARs to unmap and release
381 *
382 * Unmap and release regions specified by @mask.
383 */
384void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
385{
386	void __iomem * const *iomap;
387	int i;
388
389	iomap = pcim_iomap_table(pdev);
390	if (!iomap)
391		return;
392
393	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
394		if (!(mask & (1 << i)))
395			continue;
396
397		pcim_iounmap(pdev, iomap[i]);
398		pci_release_region(pdev, i);
399	}
400}
401EXPORT_SYMBOL(pcim_iounmap_regions);
402#endif /* CONFIG_PCI */
403#endif /* CONFIG_HAS_IOPORT */