[mirror_ubuntu-bionic-kernel.git] / lib / devres.c

// SPDX-License-Identifier: GPL-2.0
#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: Resource address 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: Resource address 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: Resource address 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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
f4a18312	2	#include <linux/err.h>
5ea81769 AV	3	#include <linux/pci.h>
5ea81769 AV	4	#include <linux/io.h>
5a0e3ad6	5	#include <linux/gfp.h>
8bc3bcc9	6	#include <linux/export.h>
5ea81769	7
b41e5fff	8	void devm_ioremap_release(struct device dev, void res)
5ea81769 AV	9	{
	10	iounmap((void __iomem *)res);
	11	}
	12
	13	static int devm_ioremap_match(struct device dev, void res, void *match_data)
	14	{
	15	return (void *)res == match_data;
	16	}
	17
	18	/**
	19	* devm_ioremap - Managed ioremap()
	20	* @dev: Generic device to remap IO address for
6524754e	21	* @offset: Resource address to map
5ea81769 AV	22	* @size: Size of map
	23	*
	24	* Managed ioremap(). Map is automatically unmapped on driver detach.
	25	*/
4f452e8a	26	void __iomem devm_ioremap(struct device dev, resource_size_t offset,
5559b7bc	27	resource_size_t size)
5ea81769 AV	28	{
	29	void __iomem *ptr, addr;
	30
	31	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
	32	if (!ptr)
	33	return NULL;
	34
	35	addr = ioremap(offset, size);
	36	if (addr) {
	37	*ptr = addr;
	38	devres_add(dev, ptr);
	39	} else
	40	devres_free(ptr);
	41
	42	return addr;
	43	}
	44	EXPORT_SYMBOL(devm_ioremap);
	45
	46	/**
	47	* devm_ioremap_nocache - Managed ioremap_nocache()
	48	* @dev: Generic device to remap IO address for
6524754e	49	* @offset: Resource address to map
5ea81769 AV	50	* @size: Size of map
	51	*
	52	* Managed ioremap_nocache(). Map is automatically unmapped on driver
	53	* detach.
	54	*/
4f452e8a	55	void __iomem devm_ioremap_nocache(struct device dev, resource_size_t offset,
5559b7bc	56	resource_size_t size)
5ea81769 AV	57	{
	58	void __iomem *ptr, addr;
	59
	60	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
	61	if (!ptr)
	62	return NULL;
	63
	64	addr = ioremap_nocache(offset, size);
	65	if (addr) {
	66	*ptr = addr;
	67	devres_add(dev, ptr);
	68	} else
	69	devres_free(ptr);
	70
	71	return addr;
	72	}
	73	EXPORT_SYMBOL(devm_ioremap_nocache);
	74
34644524 AK	75	/**
	76	* devm_ioremap_wc - Managed ioremap_wc()
	77	* @dev: Generic device to remap IO address for
6524754e	78	* @offset: Resource address to map
34644524 AK	79	* @size: Size of map
	80	*
	81	* Managed ioremap_wc(). Map is automatically unmapped on driver detach.
	82	*/
	83	void __iomem devm_ioremap_wc(struct device dev, resource_size_t offset,
	84	resource_size_t size)
	85	{
	86	void __iomem *ptr, addr;
	87
	88	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
	89	if (!ptr)
	90	return NULL;
	91
	92	addr = ioremap_wc(offset, size);
	93	if (addr) {
	94	*ptr = addr;
	95	devres_add(dev, ptr);
	96	} else
	97	devres_free(ptr);
	98
	99	return addr;
	100	}
	101	EXPORT_SYMBOL(devm_ioremap_wc);
	102
5ea81769 AV	103	/**
	104	* devm_iounmap - Managed iounmap()
	105	* @dev: Generic device to unmap for
	106	* @addr: Address to unmap
	107	*
	108	* Managed iounmap(). @addr must have been mapped using devm_ioremap*().
	109	*/
	110	void devm_iounmap(struct device dev, void __iomem addr)
	111	{
5ea81769	112	WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
b104d6a5	113	(__force void *)addr));
ae891a1b	114	iounmap(addr);
5ea81769 AV	115	}
	116	EXPORT_SYMBOL(devm_iounmap);
	117
72f8c0bf	118	/**
75096579 TR	119	* devm_ioremap_resource() - check, request region, and ioremap resource
75096579 TR	120	* @dev: generic device to handle the resource for
72f8c0bf WS	121	* @res: resource to be handled
72f8c0bf WS	122	*
92b19ff5 DW	123	* Checks that a resource is a valid memory region, requests the memory
	124	* region and ioremaps it. All operations are managed and will be undone
	125	* on driver detach.
75096579 TR	126	*
	127	* Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
	128	* on failure. Usage example:
72f8c0bf WS	129	*
72f8c0bf WS	130	* res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
75096579 TR	131	* base = devm_ioremap_resource(&pdev->dev, res);
	132	* if (IS_ERR(base))
	133	* return PTR_ERR(base);
72f8c0bf	134	*/
75096579	135	void __iomem devm_ioremap_resource(struct device dev, struct resource *res)
72f8c0bf WS	136	{
	137	resource_size_t size;
	138	const char *name;
	139	void __iomem *dest_ptr;
	140
	141	BUG_ON(!dev);
	142
	143	if (!res \|\| resource_type(res) != IORESOURCE_MEM) {
	144	dev_err(dev, "invalid resource\n");
b104d6a5	145	return IOMEM_ERR_PTR(-EINVAL);
72f8c0bf WS	146	}
	147
	148	size = resource_size(res);
	149	name = res->name ?: dev_name(dev);
	150
	151	if (!devm_request_mem_region(dev, res->start, size, name)) {
	152	dev_err(dev, "can't request region for resource %pR\n", res);
b104d6a5	153	return IOMEM_ERR_PTR(-EBUSY);
72f8c0bf WS	154	}
72f8c0bf WS	155
92b19ff5	156	dest_ptr = devm_ioremap(dev, res->start, size);
72f8c0bf WS	157	if (!dest_ptr) {
	158	dev_err(dev, "ioremap failed for resource %pR\n", res);
	159	devm_release_mem_region(dev, res->start, size);
b104d6a5	160	dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
72f8c0bf WS	161	}
	162
	163	return dest_ptr;
	164	}
75096579 TR	165	EXPORT_SYMBOL(devm_ioremap_resource);
75096579 TR	166
ce816fa8	167	#ifdef CONFIG_HAS_IOPORT_MAP
5ea81769 AV	168	/*
	169	* Generic iomap devres
	170	*/
	171	static void devm_ioport_map_release(struct device dev, void res)
	172	{
	173	ioport_unmap((void __iomem *)res);
	174	}
	175
	176	static int devm_ioport_map_match(struct device dev, void res,
	177	void *match_data)
	178	{
	179	return (void *)res == match_data;
	180	}
	181
	182	/**
	183	* devm_ioport_map - Managed ioport_map()
	184	* @dev: Generic device to map ioport for
	185	* @port: Port to map
	186	* @nr: Number of ports to map
	187	*
	188	* Managed ioport_map(). Map is automatically unmapped on driver
	189	* detach.
	190	*/
5cbb00cc	191	void __iomem devm_ioport_map(struct device dev, unsigned long port,
5ea81769 AV	192	unsigned int nr)
	193	{
	194	void __iomem *ptr, addr;
	195
	196	ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
	197	if (!ptr)
	198	return NULL;
	199
	200	addr = ioport_map(port, nr);
	201	if (addr) {
	202	*ptr = addr;
	203	devres_add(dev, ptr);
	204	} else
	205	devres_free(ptr);
	206
	207	return addr;
	208	}
	209	EXPORT_SYMBOL(devm_ioport_map);
	210
	211	/**
	212	* devm_ioport_unmap - Managed ioport_unmap()
	213	* @dev: Generic device to unmap for
	214	* @addr: Address to unmap
	215	*
	216	* Managed ioport_unmap(). @addr must have been mapped using
	217	* devm_ioport_map().
	218	*/
	219	void devm_ioport_unmap(struct device dev, void __iomem addr)
	220	{
	221	ioport_unmap(addr);
	222	WARN_ON(devres_destroy(dev, devm_ioport_map_release,
b104d6a5	223	devm_ioport_map_match, (__force void *)addr));
5ea81769 AV	224	}
5ea81769 AV	225	EXPORT_SYMBOL(devm_ioport_unmap);
ce816fa8	226	#endif /* CONFIG_HAS_IOPORT_MAP */
5ea81769 AV	227
	228	#ifdef CONFIG_PCI
	229	/*
	230	* PCI iomap devres
	231	*/
	232	#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
	233
	234	struct pcim_iomap_devres {
	235	void __iomem *table[PCIM_IOMAP_MAX];
	236	};
	237
	238	static void pcim_iomap_release(struct device gendev, void res)
	239	{
20af74ef	240	struct pci_dev *dev = to_pci_dev(gendev);
5ea81769 AV	241	struct pcim_iomap_devres *this = res;
	242	int i;
	243
	244	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	245	if (this->table[i])
	246	pci_iounmap(dev, this->table[i]);
	247	}
	248
	249	/**
	250	* pcim_iomap_table - access iomap allocation table
	251	* @pdev: PCI device to access iomap table for
	252	*
	253	* Access iomap allocation table for @dev. If iomap table doesn't
	254	* exist and @pdev is managed, it will be allocated. All iomaps
	255	* recorded in the iomap table are automatically unmapped on driver
	256	* detach.
	257	*
	258	* This function might sleep when the table is first allocated but can
	259	* be safely called without context and guaranteed to succed once
	260	* allocated.
	261	*/
5cbb00cc	262	void __iomem * const pcim_iomap_table(struct pci_dev pdev)
5ea81769 AV	263	{
	264	struct pcim_iomap_devres dr, new_dr;
	265
	266	dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
	267	if (dr)
	268	return dr->table;
	269
	270	new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
	271	if (!new_dr)
	272	return NULL;
	273	dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
	274	return dr->table;
	275	}
	276	EXPORT_SYMBOL(pcim_iomap_table);
	277
	278	/**
	279	* pcim_iomap - Managed pcim_iomap()
	280	* @pdev: PCI device to iomap for
	281	* @bar: BAR to iomap
	282	* @maxlen: Maximum length of iomap
	283	*
	284	* Managed pci_iomap(). Map is automatically unmapped on driver
	285	* detach.
	286	*/
5cbb00cc	287	void __iomem pcim_iomap(struct pci_dev pdev, int bar, unsigned long maxlen)
5ea81769 AV	288	{
	289	void __iomem **tbl;
	290
	291	BUG_ON(bar >= PCIM_IOMAP_MAX);
	292
	293	tbl = (void __iomem **)pcim_iomap_table(pdev);
	294	if (!tbl \|\| tbl[bar]) /* duplicate mappings not allowed */
	295	return NULL;
	296
	297	tbl[bar] = pci_iomap(pdev, bar, maxlen);
	298	return tbl[bar];
	299	}
	300	EXPORT_SYMBOL(pcim_iomap);
	301
	302	/**
	303	* pcim_iounmap - Managed pci_iounmap()
	304	* @pdev: PCI device to iounmap for
	305	* @addr: Address to unmap
	306	*
	307	* Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
	308	*/
	309	void pcim_iounmap(struct pci_dev pdev, void __iomem addr)
	310	{
	311	void __iomem **tbl;
	312	int i;
	313
	314	pci_iounmap(pdev, addr);
	315
	316	tbl = (void __iomem **)pcim_iomap_table(pdev);
	317	BUG_ON(!tbl);
	318
	319	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	320	if (tbl[i] == addr) {
	321	tbl[i] = NULL;
	322	return;
	323	}
	324	WARN_ON(1);
	325	}
	326	EXPORT_SYMBOL(pcim_iounmap);
	327
	328	/**
	329	* pcim_iomap_regions - Request and iomap PCI BARs
	330	* @pdev: PCI device to map IO resources for
	331	* @mask: Mask of BARs to request and iomap
	332	* @name: Name used when requesting regions
	333	*
	334	* Request and iomap regions specified by @mask.
	335	*/
fb7ebfe4	336	int pcim_iomap_regions(struct pci_dev pdev, int mask, const char name)
5ea81769 AV	337	{
	338	void __iomem * const *iomap;
	339	int i, rc;
	340
	341	iomap = pcim_iomap_table(pdev);
	342	if (!iomap)
	343	return -ENOMEM;
	344
	345	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
	346	unsigned long len;
	347
	348	if (!(mask & (1 << i)))
	349	continue;
	350
	351	rc = -EINVAL;
	352	len = pci_resource_len(pdev, i);
	353	if (!len)
	354	goto err_inval;
	355
	356	rc = pci_request_region(pdev, i, name);
	357	if (rc)
fb4d64e7	358	goto err_inval;
5ea81769 AV	359
	360	rc = -ENOMEM;
	361	if (!pcim_iomap(pdev, i, 0))
fb4d64e7	362	goto err_region;
5ea81769 AV	363	}
	364
	365	return 0;
	366
5ea81769 AV	367	err_region:
	368	pci_release_region(pdev, i);
	369	err_inval:
	370	while (--i >= 0) {
fb4d64e7 FD	371	if (!(mask & (1 << i)))
fb4d64e7 FD	372	continue;
5ea81769 AV	373	pcim_iounmap(pdev, iomap[i]);
	374	pci_release_region(pdev, i);
	375	}
	376
	377	return rc;
	378	}
	379	EXPORT_SYMBOL(pcim_iomap_regions);
ec04b075	380
916fbfb7 TH	381	/**
	382	* pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
	383	* @pdev: PCI device to map IO resources for
	384	* @mask: Mask of BARs to iomap
	385	* @name: Name used when requesting regions
	386	*
	387	* Request all PCI BARs and iomap regions specified by @mask.
	388	*/
fb7ebfe4	389	int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
916fbfb7 TH	390	const char *name)
	391	{
	392	int request_mask = ((1 << 6) - 1) & ~mask;
	393	int rc;
	394
	395	rc = pci_request_selected_regions(pdev, request_mask, name);
	396	if (rc)
	397	return rc;
	398
	399	rc = pcim_iomap_regions(pdev, mask, name);
	400	if (rc)
	401	pci_release_selected_regions(pdev, request_mask);
	402	return rc;
	403	}
	404	EXPORT_SYMBOL(pcim_iomap_regions_request_all);
	405
ec04b075 TH	406	/**
	407	* pcim_iounmap_regions - Unmap and release PCI BARs
	408	* @pdev: PCI device to map IO resources for
	409	* @mask: Mask of BARs to unmap and release
	410	*
4d45ada3	411	* Unmap and release regions specified by @mask.
ec04b075	412	*/
fb7ebfe4	413	void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
ec04b075 TH	414	{
	415	void __iomem * const *iomap;
	416	int i;
	417
	418	iomap = pcim_iomap_table(pdev);
	419	if (!iomap)
	420	return;
	421
1f35d04a	422	for (i = 0; i < PCIM_IOMAP_MAX; i++) {
ec04b075 TH	423	if (!(mask & (1 << i)))
	424	continue;
	425
	426	pcim_iounmap(pdev, iomap[i]);
	427	pci_release_region(pdev, i);
	428	}
	429	}
	430	EXPORT_SYMBOL(pcim_iounmap_regions);
571806a9	431	#endif /* CONFIG_PCI */