[mirror_ubuntu-bionic-kernel.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 either as cacheable or as non-cacheable memory depending on
 * the resource's flags. 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);
	}

	if (res->flags & IORESOURCE_CACHEABLE)
		dest_ptr = devm_ioremap(dev, res->start, size);
	else
		dest_ptr = devm_ioremap_nocache(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 = container_of(gendev, struct pci_dev, dev);
	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 < DEVICE_COUNT_RESOURCE; 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	*
75096579 TR	122	* Checks that a resource is a valid memory region, requests the memory region
	123	* and ioremaps it either as cacheable or as non-cacheable memory depending on
	124	* the resource's flags. All operations are managed and will be undone on
	125	* driver detach.
	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	}
	155
	156	if (res->flags & IORESOURCE_CACHEABLE)
	157	dest_ptr = devm_ioremap(dev, res->start, size);
	158	else
	159	dest_ptr = devm_ioremap_nocache(dev, res->start, size);
	160
	161	if (!dest_ptr) {
	162	dev_err(dev, "ioremap failed for resource %pR\n", res);
	163	devm_release_mem_region(dev, res->start, size);
b104d6a5	164	dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
72f8c0bf WS	165	}
	166
	167	return dest_ptr;
	168	}
75096579 TR	169	EXPORT_SYMBOL(devm_ioremap_resource);
75096579 TR	170
ce816fa8	171	#ifdef CONFIG_HAS_IOPORT_MAP
5ea81769 AV	172	/*
	173	* Generic iomap devres
	174	*/
	175	static void devm_ioport_map_release(struct device dev, void res)
	176	{
	177	ioport_unmap((void __iomem *)res);
	178	}
	179
	180	static int devm_ioport_map_match(struct device dev, void res,
	181	void *match_data)
	182	{
	183	return (void *)res == match_data;
	184	}
	185
	186	/**
	187	* devm_ioport_map - Managed ioport_map()
	188	* @dev: Generic device to map ioport for
	189	* @port: Port to map
	190	* @nr: Number of ports to map
	191	*
	192	* Managed ioport_map(). Map is automatically unmapped on driver
	193	* detach.
	194	*/
5cbb00cc	195	void __iomem devm_ioport_map(struct device dev, unsigned long port,
5ea81769 AV	196	unsigned int nr)
	197	{
	198	void __iomem *ptr, addr;
	199
	200	ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
	201	if (!ptr)
	202	return NULL;
	203
	204	addr = ioport_map(port, nr);
	205	if (addr) {
	206	*ptr = addr;
	207	devres_add(dev, ptr);
	208	} else
	209	devres_free(ptr);
	210
	211	return addr;
	212	}
	213	EXPORT_SYMBOL(devm_ioport_map);
	214
	215	/**
	216	* devm_ioport_unmap - Managed ioport_unmap()
	217	* @dev: Generic device to unmap for
	218	* @addr: Address to unmap
	219	*
	220	* Managed ioport_unmap(). @addr must have been mapped using
	221	* devm_ioport_map().
	222	*/
	223	void devm_ioport_unmap(struct device dev, void __iomem addr)
	224	{
	225	ioport_unmap(addr);
	226	WARN_ON(devres_destroy(dev, devm_ioport_map_release,
b104d6a5	227	devm_ioport_map_match, (__force void *)addr));
5ea81769 AV	228	}
5ea81769 AV	229	EXPORT_SYMBOL(devm_ioport_unmap);
ce816fa8	230	#endif /* CONFIG_HAS_IOPORT_MAP */
5ea81769 AV	231
	232	#ifdef CONFIG_PCI
	233	/*
	234	* PCI iomap devres
	235	*/
	236	#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
	237
	238	struct pcim_iomap_devres {
	239	void __iomem *table[PCIM_IOMAP_MAX];
	240	};
	241
	242	static void pcim_iomap_release(struct device gendev, void res)
	243	{
	244	struct pci_dev *dev = container_of(gendev, struct pci_dev, dev);
	245	struct pcim_iomap_devres *this = res;
	246	int i;
	247
	248	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	249	if (this->table[i])
	250	pci_iounmap(dev, this->table[i]);
	251	}
	252
	253	/**
	254	* pcim_iomap_table - access iomap allocation table
	255	* @pdev: PCI device to access iomap table for
	256	*
	257	* Access iomap allocation table for @dev. If iomap table doesn't
	258	* exist and @pdev is managed, it will be allocated. All iomaps
	259	* recorded in the iomap table are automatically unmapped on driver
	260	* detach.
	261	*
	262	* This function might sleep when the table is first allocated but can
	263	* be safely called without context and guaranteed to succed once
	264	* allocated.
	265	*/
5cbb00cc	266	void __iomem * const pcim_iomap_table(struct pci_dev pdev)
5ea81769 AV	267	{
	268	struct pcim_iomap_devres dr, new_dr;
	269
	270	dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
	271	if (dr)
	272	return dr->table;
	273
	274	new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
	275	if (!new_dr)
	276	return NULL;
	277	dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
	278	return dr->table;
	279	}
	280	EXPORT_SYMBOL(pcim_iomap_table);
	281
	282	/**
	283	* pcim_iomap - Managed pcim_iomap()
	284	* @pdev: PCI device to iomap for
	285	* @bar: BAR to iomap
	286	* @maxlen: Maximum length of iomap
	287	*
	288	* Managed pci_iomap(). Map is automatically unmapped on driver
	289	* detach.
	290	*/
5cbb00cc	291	void __iomem pcim_iomap(struct pci_dev pdev, int bar, unsigned long maxlen)
5ea81769 AV	292	{
	293	void __iomem **tbl;
	294
	295	BUG_ON(bar >= PCIM_IOMAP_MAX);
	296
	297	tbl = (void __iomem **)pcim_iomap_table(pdev);
	298	if (!tbl \|\| tbl[bar]) /* duplicate mappings not allowed */
	299	return NULL;
	300
	301	tbl[bar] = pci_iomap(pdev, bar, maxlen);
	302	return tbl[bar];
	303	}
	304	EXPORT_SYMBOL(pcim_iomap);
	305
	306	/**
	307	* pcim_iounmap - Managed pci_iounmap()
	308	* @pdev: PCI device to iounmap for
	309	* @addr: Address to unmap
	310	*
	311	* Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
	312	*/
	313	void pcim_iounmap(struct pci_dev pdev, void __iomem addr)
	314	{
	315	void __iomem **tbl;
	316	int i;
	317
	318	pci_iounmap(pdev, addr);
	319
	320	tbl = (void __iomem **)pcim_iomap_table(pdev);
	321	BUG_ON(!tbl);
	322
	323	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	324	if (tbl[i] == addr) {
	325	tbl[i] = NULL;
	326	return;
	327	}
	328	WARN_ON(1);
	329	}
	330	EXPORT_SYMBOL(pcim_iounmap);
	331
	332	/**
	333	* pcim_iomap_regions - Request and iomap PCI BARs
	334	* @pdev: PCI device to map IO resources for
	335	* @mask: Mask of BARs to request and iomap
	336	* @name: Name used when requesting regions
	337	*
	338	* Request and iomap regions specified by @mask.
	339	*/
fb7ebfe4	340	int pcim_iomap_regions(struct pci_dev pdev, int mask, const char name)
5ea81769 AV	341	{
	342	void __iomem * const *iomap;
	343	int i, rc;
	344
	345	iomap = pcim_iomap_table(pdev);
	346	if (!iomap)
	347	return -ENOMEM;
	348
	349	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
	350	unsigned long len;
	351
	352	if (!(mask & (1 << i)))
	353	continue;
	354
	355	rc = -EINVAL;
	356	len = pci_resource_len(pdev, i);
	357	if (!len)
	358	goto err_inval;
	359
	360	rc = pci_request_region(pdev, i, name);
	361	if (rc)
fb4d64e7	362	goto err_inval;
5ea81769 AV	363
	364	rc = -ENOMEM;
	365	if (!pcim_iomap(pdev, i, 0))
fb4d64e7	366	goto err_region;
5ea81769 AV	367	}
	368
	369	return 0;
	370
5ea81769 AV	371	err_region:
	372	pci_release_region(pdev, i);
	373	err_inval:
	374	while (--i >= 0) {
fb4d64e7 FD	375	if (!(mask & (1 << i)))
fb4d64e7 FD	376	continue;
5ea81769 AV	377	pcim_iounmap(pdev, iomap[i]);
	378	pci_release_region(pdev, i);
	379	}
	380
	381	return rc;
	382	}
	383	EXPORT_SYMBOL(pcim_iomap_regions);
ec04b075	384
916fbfb7 TH	385	/**
	386	* pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
	387	* @pdev: PCI device to map IO resources for
	388	* @mask: Mask of BARs to iomap
	389	* @name: Name used when requesting regions
	390	*
	391	* Request all PCI BARs and iomap regions specified by @mask.
	392	*/
fb7ebfe4	393	int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
916fbfb7 TH	394	const char *name)
	395	{
	396	int request_mask = ((1 << 6) - 1) & ~mask;
	397	int rc;
	398
	399	rc = pci_request_selected_regions(pdev, request_mask, name);
	400	if (rc)
	401	return rc;
	402
	403	rc = pcim_iomap_regions(pdev, mask, name);
	404	if (rc)
	405	pci_release_selected_regions(pdev, request_mask);
	406	return rc;
	407	}
	408	EXPORT_SYMBOL(pcim_iomap_regions_request_all);
	409
ec04b075 TH	410	/**
	411	* pcim_iounmap_regions - Unmap and release PCI BARs
	412	* @pdev: PCI device to map IO resources for
	413	* @mask: Mask of BARs to unmap and release
	414	*
4d45ada3	415	* Unmap and release regions specified by @mask.
ec04b075	416	*/
fb7ebfe4	417	void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
ec04b075 TH	418	{
	419	void __iomem * const *iomap;
	420	int i;
	421
	422	iomap = pcim_iomap_table(pdev);
	423	if (!iomap)
	424	return;
	425
	426	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
	427	if (!(mask & (1 << i)))
	428	continue;
	429
	430	pcim_iounmap(pdev, iomap[i]);
	431	pci_release_region(pdev, i);
	432	}
	433	}
	434	EXPORT_SYMBOL(pcim_iounmap_regions);
571806a9	435	#endif /* CONFIG_PCI */