[linux.git] / lib / devres.c

#include <linux/err.h>
#include <linux/pci.h>
#include <linux/io.h>
#include <linux/gfp.h>
#include <linux/export.h>

void devm_ioremap_release(struct device *dev, void *res)
{
	iounmap(*(void __iomem **)res);
}

static int devm_ioremap_match(struct device *dev, void *res, void *match_data)
{
	return *(void **)res == match_data;
}

/**
 * devm_ioremap - Managed ioremap()
 * @dev: Generic device to remap IO address for
 * @offset: BUS offset to map
 * @size: Size of map
 *
 * Managed ioremap().  Map is automatically unmapped on driver detach.
 */
void __iomem *devm_ioremap(struct device *dev, resource_size_t offset,
			   resource_size_t size)
{
	void __iomem **ptr, *addr;

	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
	if (!ptr)
		return NULL;

	addr = ioremap(offset, size);
	if (addr) {
		*ptr = addr;
		devres_add(dev, ptr);
	} else
		devres_free(ptr);

	return addr;
}
EXPORT_SYMBOL(devm_ioremap);

/**
 * devm_ioremap_nocache - Managed ioremap_nocache()
 * @dev: Generic device to remap IO address for
 * @offset: BUS offset to map
 * @size: Size of map
 *
 * Managed ioremap_nocache().  Map is automatically unmapped on driver
 * detach.
 */
void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
				   resource_size_t size)
{
	void __iomem **ptr, *addr;

	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
	if (!ptr)
		return NULL;

	addr = ioremap_nocache(offset, size);
	if (addr) {
		*ptr = addr;
		devres_add(dev, ptr);
	} else
		devres_free(ptr);

	return addr;
}
EXPORT_SYMBOL(devm_ioremap_nocache);

/**
 * devm_ioremap_wc - Managed ioremap_wc()
 * @dev: Generic device to remap IO address for
 * @offset: BUS offset to map
 * @size: Size of map
 *
 * Managed ioremap_wc().  Map is automatically unmapped on driver detach.
 */
void __iomem *devm_ioremap_wc(struct device *dev, resource_size_t offset,
			      resource_size_t size)
{
	void __iomem **ptr, *addr;

	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
	if (!ptr)
		return NULL;

	addr = ioremap_wc(offset, size);
	if (addr) {
		*ptr = addr;
		devres_add(dev, ptr);
	} else
		devres_free(ptr);

	return addr;
}
EXPORT_SYMBOL(devm_ioremap_wc);

/**
 * devm_iounmap - Managed iounmap()
 * @dev: Generic device to unmap for
 * @addr: Address to unmap
 *
 * Managed iounmap().  @addr must have been mapped using devm_ioremap*().
 */
void devm_iounmap(struct device *dev, void __iomem *addr)
{
	WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
			       (__force void *)addr));
	iounmap(addr);
}
EXPORT_SYMBOL(devm_iounmap);

/**
 * devm_ioremap_resource() - check, request region, and ioremap resource
 * @dev: generic device to handle the resource for
 * @res: resource to be handled
 *
 * Checks that a resource is a valid memory region, requests the memory
 * region and ioremaps it. All operations are managed and will be undone
 * on driver detach.
 *
 * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
 * on failure. Usage example:
 *
 *	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 *	base = devm_ioremap_resource(&pdev->dev, res);
 *	if (IS_ERR(base))
 *		return PTR_ERR(base);
 */
void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res)
{
	resource_size_t size;
	const char *name;
	void __iomem *dest_ptr;

	BUG_ON(!dev);

	if (!res || resource_type(res) != IORESOURCE_MEM) {
		dev_err(dev, "invalid resource\n");
		return IOMEM_ERR_PTR(-EINVAL);
	}

	size = resource_size(res);
	name = res->name ?: dev_name(dev);

	if (!devm_request_mem_region(dev, res->start, size, name)) {
		dev_err(dev, "can't request region for resource %pR\n", res);
		return IOMEM_ERR_PTR(-EBUSY);
	}

	dest_ptr = devm_ioremap(dev, res->start, size);
	if (!dest_ptr) {
		dev_err(dev, "ioremap failed for resource %pR\n", res);
		devm_release_mem_region(dev, res->start, size);
		dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
	}

	return dest_ptr;
}
EXPORT_SYMBOL(devm_ioremap_resource);

#ifdef CONFIG_HAS_IOPORT_MAP
/*
 * Generic iomap devres
 */
static void devm_ioport_map_release(struct device *dev, void *res)
{
	ioport_unmap(*(void __iomem **)res);
}

static int devm_ioport_map_match(struct device *dev, void *res,
				 void *match_data)
{
	return *(void **)res == match_data;
}

/**
 * devm_ioport_map - Managed ioport_map()
 * @dev: Generic device to map ioport for
 * @port: Port to map
 * @nr: Number of ports to map
 *
 * Managed ioport_map().  Map is automatically unmapped on driver
 * detach.
 */
void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
			       unsigned int nr)
{
	void __iomem **ptr, *addr;

	ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
	if (!ptr)
		return NULL;

	addr = ioport_map(port, nr);
	if (addr) {
		*ptr = addr;
		devres_add(dev, ptr);
	} else
		devres_free(ptr);

	return addr;
}
EXPORT_SYMBOL(devm_ioport_map);

/**
 * devm_ioport_unmap - Managed ioport_unmap()
 * @dev: Generic device to unmap for
 * @addr: Address to unmap
 *
 * Managed ioport_unmap().  @addr must have been mapped using
 * devm_ioport_map().
 */
void devm_ioport_unmap(struct device *dev, void __iomem *addr)
{
	ioport_unmap(addr);
	WARN_ON(devres_destroy(dev, devm_ioport_map_release,
			       devm_ioport_map_match, (__force void *)addr));
}
EXPORT_SYMBOL(devm_ioport_unmap);
#endif /* CONFIG_HAS_IOPORT_MAP */

#ifdef CONFIG_PCI
/*
 * PCI iomap devres
 */
#define PCIM_IOMAP_MAX	PCI_ROM_RESOURCE

struct pcim_iomap_devres {
	void __iomem *table[PCIM_IOMAP_MAX];
};

static void pcim_iomap_release(struct device *gendev, void *res)
{
	struct pci_dev *dev = to_pci_dev(gendev);
	struct pcim_iomap_devres *this = res;
	int i;

	for (i = 0; i < PCIM_IOMAP_MAX; i++)
		if (this->table[i])
			pci_iounmap(dev, this->table[i]);
}

/**
 * pcim_iomap_table - access iomap allocation table
 * @pdev: PCI device to access iomap table for
 *
 * Access iomap allocation table for @dev.  If iomap table doesn't
 * exist and @pdev is managed, it will be allocated.  All iomaps
 * recorded in the iomap table are automatically unmapped on driver
 * detach.
 *
 * This function might sleep when the table is first allocated but can
 * be safely called without context and guaranteed to succed once
 * allocated.
 */
void __iomem * const *pcim_iomap_table(struct pci_dev *pdev)
{
	struct pcim_iomap_devres *dr, *new_dr;

	dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
	if (dr)
		return dr->table;

	new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
	if (!new_dr)
		return NULL;
	dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
	return dr->table;
}
EXPORT_SYMBOL(pcim_iomap_table);

/**
 * pcim_iomap - Managed pcim_iomap()
 * @pdev: PCI device to iomap for
 * @bar: BAR to iomap
 * @maxlen: Maximum length of iomap
 *
 * Managed pci_iomap().  Map is automatically unmapped on driver
 * detach.
 */
void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
{
	void __iomem **tbl;

	BUG_ON(bar >= PCIM_IOMAP_MAX);

	tbl = (void __iomem **)pcim_iomap_table(pdev);
	if (!tbl || tbl[bar])	/* duplicate mappings not allowed */
		return NULL;

	tbl[bar] = pci_iomap(pdev, bar, maxlen);
	return tbl[bar];
}
EXPORT_SYMBOL(pcim_iomap);

/**
 * pcim_iounmap - Managed pci_iounmap()
 * @pdev: PCI device to iounmap for
 * @addr: Address to unmap
 *
 * Managed pci_iounmap().  @addr must have been mapped using pcim_iomap().
 */
void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr)
{
	void __iomem **tbl;
	int i;

	pci_iounmap(pdev, addr);

	tbl = (void __iomem **)pcim_iomap_table(pdev);
	BUG_ON(!tbl);

	for (i = 0; i < PCIM_IOMAP_MAX; i++)
		if (tbl[i] == addr) {
			tbl[i] = NULL;
			return;
		}
	WARN_ON(1);
}
EXPORT_SYMBOL(pcim_iounmap);

/**
 * pcim_iomap_regions - Request and iomap PCI BARs
 * @pdev: PCI device to map IO resources for
 * @mask: Mask of BARs to request and iomap
 * @name: Name used when requesting regions
 *
 * Request and iomap regions specified by @mask.
 */
int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name)
{
	void __iomem * const *iomap;
	int i, rc;

	iomap = pcim_iomap_table(pdev);
	if (!iomap)
		return -ENOMEM;

	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
		unsigned long len;

		if (!(mask & (1 << i)))
			continue;

		rc = -EINVAL;
		len = pci_resource_len(pdev, i);
		if (!len)
			goto err_inval;

		rc = pci_request_region(pdev, i, name);
		if (rc)
			goto err_inval;

		rc = -ENOMEM;
		if (!pcim_iomap(pdev, i, 0))
			goto err_region;
	}

	return 0;

 err_region:
	pci_release_region(pdev, i);
 err_inval:
	while (--i >= 0) {
		if (!(mask & (1 << i)))
			continue;
		pcim_iounmap(pdev, iomap[i]);
		pci_release_region(pdev, i);
	}

	return rc;
}
EXPORT_SYMBOL(pcim_iomap_regions);

/**
 * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
 * @pdev: PCI device to map IO resources for
 * @mask: Mask of BARs to iomap
 * @name: Name used when requesting regions
 *
 * Request all PCI BARs and iomap regions specified by @mask.
 */
int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
				   const char *name)
{
	int request_mask = ((1 << 6) - 1) & ~mask;
	int rc;

	rc = pci_request_selected_regions(pdev, request_mask, name);
	if (rc)
		return rc;

	rc = pcim_iomap_regions(pdev, mask, name);
	if (rc)
		pci_release_selected_regions(pdev, request_mask);
	return rc;
}
EXPORT_SYMBOL(pcim_iomap_regions_request_all);

/**
 * pcim_iounmap_regions - Unmap and release PCI BARs
 * @pdev: PCI device to map IO resources for
 * @mask: Mask of BARs to unmap and release
 *
 * Unmap and release regions specified by @mask.
 */
void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
{
	void __iomem * const *iomap;
	int i;

	iomap = pcim_iomap_table(pdev);
	if (!iomap)
		return;

	for (i = 0; i < PCIM_IOMAP_MAX; i++) {
		if (!(mask & (1 << i)))
			continue;

		pcim_iounmap(pdev, iomap[i]);
		pci_release_region(pdev, i);
	}
}
EXPORT_SYMBOL(pcim_iounmap_regions);
#endif /* CONFIG_PCI */
Commit	Line	Data
f4a18312	1	#include <linux/err.h>
5ea81769 AV	2	#include <linux/pci.h>
5ea81769 AV	3	#include <linux/io.h>
5a0e3ad6	4	#include <linux/gfp.h>
8bc3bcc9	5	#include <linux/export.h>
5ea81769	6
b41e5fff	7	void devm_ioremap_release(struct device dev, void res)
5ea81769 AV	8	{
	9	iounmap((void __iomem *)res);
	10	}
	11
	12	static 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	*/
4f452e8a	25	void __iomem devm_ioremap(struct device dev, resource_size_t offset,
5559b7bc	26	resource_size_t size)
5ea81769 AV	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	}
	43	EXPORT_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	*/
4f452e8a	54	void __iomem devm_ioremap_nocache(struct device dev, resource_size_t offset,
5559b7bc	55	resource_size_t size)
5ea81769 AV	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	}
	72	EXPORT_SYMBOL(devm_ioremap_nocache);
	73
34644524 AK	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	*/
	82	void __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	}
	100	EXPORT_SYMBOL(devm_ioremap_wc);
	101
5ea81769 AV	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	*/
	109	void devm_iounmap(struct device dev, void __iomem addr)
	110	{
5ea81769	111	WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
b104d6a5	112	(__force void *)addr));
ae891a1b	113	iounmap(addr);
5ea81769 AV	114	}
	115	EXPORT_SYMBOL(devm_iounmap);
	116
72f8c0bf	117	/**
75096579 TR	118	* devm_ioremap_resource() - check, request region, and ioremap resource
75096579 TR	119	* @dev: generic device to handle the resource for
72f8c0bf WS	120	* @res: resource to be handled
72f8c0bf WS	121	*
92b19ff5 DW	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.
75096579 TR	125	*
	126	* Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
	127	* on failure. Usage example:
72f8c0bf WS	128	*
72f8c0bf WS	129	* res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
75096579 TR	130	* base = devm_ioremap_resource(&pdev->dev, res);
	131	* if (IS_ERR(base))
	132	* return PTR_ERR(base);
72f8c0bf	133	*/
75096579	134	void __iomem devm_ioremap_resource(struct device dev, struct resource *res)
72f8c0bf WS	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");
b104d6a5	144	return IOMEM_ERR_PTR(-EINVAL);
72f8c0bf WS	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);
b104d6a5	152	return IOMEM_ERR_PTR(-EBUSY);
72f8c0bf WS	153	}
72f8c0bf WS	154
92b19ff5	155	dest_ptr = devm_ioremap(dev, res->start, size);
72f8c0bf WS	156	if (!dest_ptr) {
	157	dev_err(dev, "ioremap failed for resource %pR\n", res);
	158	devm_release_mem_region(dev, res->start, size);
b104d6a5	159	dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
72f8c0bf WS	160	}
	161
	162	return dest_ptr;
	163	}
75096579 TR	164	EXPORT_SYMBOL(devm_ioremap_resource);
75096579 TR	165
ce816fa8	166	#ifdef CONFIG_HAS_IOPORT_MAP
5ea81769 AV	167	/*
	168	* Generic iomap devres
	169	*/
	170	static void devm_ioport_map_release(struct device dev, void res)
	171	{
	172	ioport_unmap((void __iomem *)res);
	173	}
	174
	175	static 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	*/
5cbb00cc	190	void __iomem devm_ioport_map(struct device dev, unsigned long port,
5ea81769 AV	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	}
	208	EXPORT_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	*/
	218	void devm_ioport_unmap(struct device dev, void __iomem addr)
	219	{
	220	ioport_unmap(addr);
	221	WARN_ON(devres_destroy(dev, devm_ioport_map_release,
b104d6a5	222	devm_ioport_map_match, (__force void *)addr));
5ea81769 AV	223	}
5ea81769 AV	224	EXPORT_SYMBOL(devm_ioport_unmap);
ce816fa8	225	#endif /* CONFIG_HAS_IOPORT_MAP */
5ea81769 AV	226
	227	#ifdef CONFIG_PCI
	228	/*
	229	* PCI iomap devres
	230	*/
	231	#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
	232
	233	struct pcim_iomap_devres {
	234	void __iomem *table[PCIM_IOMAP_MAX];
	235	};
	236
	237	static void pcim_iomap_release(struct device gendev, void res)
	238	{
20af74ef	239	struct pci_dev *dev = to_pci_dev(gendev);
5ea81769 AV	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	*/
5cbb00cc	261	void __iomem * const pcim_iomap_table(struct pci_dev pdev)
5ea81769 AV	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	}
	275	EXPORT_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	*/
5cbb00cc	286	void __iomem pcim_iomap(struct pci_dev pdev, int bar, unsigned long maxlen)
5ea81769 AV	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	}
	299	EXPORT_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	*/
	308	void 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	}
	325	EXPORT_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	*/
fb7ebfe4	335	int pcim_iomap_regions(struct pci_dev pdev, int mask, const char name)
5ea81769 AV	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)
fb4d64e7	357	goto err_inval;
5ea81769 AV	358
	359	rc = -ENOMEM;
	360	if (!pcim_iomap(pdev, i, 0))
fb4d64e7	361	goto err_region;
5ea81769 AV	362	}
	363
	364	return 0;
	365
5ea81769 AV	366	err_region:
	367	pci_release_region(pdev, i);
	368	err_inval:
	369	while (--i >= 0) {
fb4d64e7 FD	370	if (!(mask & (1 << i)))
fb4d64e7 FD	371	continue;
5ea81769 AV	372	pcim_iounmap(pdev, iomap[i]);
	373	pci_release_region(pdev, i);
	374	}
	375
	376	return rc;
	377	}
	378	EXPORT_SYMBOL(pcim_iomap_regions);
ec04b075	379
916fbfb7 TH	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	*/
fb7ebfe4	388	int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
916fbfb7 TH	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	}
	403	EXPORT_SYMBOL(pcim_iomap_regions_request_all);
	404
ec04b075 TH	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	*
4d45ada3	410	* Unmap and release regions specified by @mask.
ec04b075	411	*/
fb7ebfe4	412	void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
ec04b075 TH	413	{
	414	void __iomem * const *iomap;
	415	int i;
	416
	417	iomap = pcim_iomap_table(pdev);
	418	if (!iomap)
	419	return;
	420
1f35d04a	421	for (i = 0; i < PCIM_IOMAP_MAX; i++) {
ec04b075 TH	422	if (!(mask & (1 << i)))
	423	continue;
	424
	425	pcim_iounmap(pdev, iomap[i]);
	426	pci_release_region(pdev, i);
	427	}
	428	}
	429	EXPORT_SYMBOL(pcim_iounmap_regions);
571806a9	430	#endif /* CONFIG_PCI */