[linux-2.6-block.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_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
	74	/**
	75	* devm_iounmap - Managed iounmap()
	76	* @dev: Generic device to unmap for
	77	* @addr: Address to unmap
	78	*
	79	* Managed iounmap(). @addr must have been mapped using devm_ioremap*().
	80	*/
	81	void devm_iounmap(struct device dev, void __iomem addr)
	82	{
5ea81769	83	WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
b104d6a5	84	(__force void *)addr));
ae891a1b	85	iounmap(addr);
5ea81769 AV	86	}
	87	EXPORT_SYMBOL(devm_iounmap);
	88
72f8c0bf	89	/**
75096579 TR	90	* devm_ioremap_resource() - check, request region, and ioremap resource
75096579 TR	91	* @dev: generic device to handle the resource for
72f8c0bf WS	92	* @res: resource to be handled
72f8c0bf WS	93	*
75096579 TR	94	* Checks that a resource is a valid memory region, requests the memory region
	95	* and ioremaps it either as cacheable or as non-cacheable memory depending on
	96	* the resource's flags. All operations are managed and will be undone on
	97	* driver detach.
	98	*
	99	* Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
	100	* on failure. Usage example:
72f8c0bf WS	101	*
72f8c0bf WS	102	* res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
75096579 TR	103	* base = devm_ioremap_resource(&pdev->dev, res);
	104	* if (IS_ERR(base))
	105	* return PTR_ERR(base);
72f8c0bf	106	*/
75096579	107	void __iomem devm_ioremap_resource(struct device dev, struct resource *res)
72f8c0bf WS	108	{
	109	resource_size_t size;
	110	const char *name;
	111	void __iomem *dest_ptr;
	112
	113	BUG_ON(!dev);
	114
	115	if (!res \|\| resource_type(res) != IORESOURCE_MEM) {
	116	dev_err(dev, "invalid resource\n");
b104d6a5	117	return IOMEM_ERR_PTR(-EINVAL);
72f8c0bf WS	118	}
	119
	120	size = resource_size(res);
	121	name = res->name ?: dev_name(dev);
	122
	123	if (!devm_request_mem_region(dev, res->start, size, name)) {
	124	dev_err(dev, "can't request region for resource %pR\n", res);
b104d6a5	125	return IOMEM_ERR_PTR(-EBUSY);
72f8c0bf WS	126	}
	127
	128	if (res->flags & IORESOURCE_CACHEABLE)
	129	dest_ptr = devm_ioremap(dev, res->start, size);
	130	else
	131	dest_ptr = devm_ioremap_nocache(dev, res->start, size);
	132
	133	if (!dest_ptr) {
	134	dev_err(dev, "ioremap failed for resource %pR\n", res);
	135	devm_release_mem_region(dev, res->start, size);
b104d6a5	136	dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
72f8c0bf WS	137	}
	138
	139	return dest_ptr;
	140	}
75096579 TR	141	EXPORT_SYMBOL(devm_ioremap_resource);
75096579 TR	142
ce816fa8	143	#ifdef CONFIG_HAS_IOPORT_MAP
5ea81769 AV	144	/*
	145	* Generic iomap devres
	146	*/
	147	static void devm_ioport_map_release(struct device dev, void res)
	148	{
	149	ioport_unmap((void __iomem *)res);
	150	}
	151
	152	static int devm_ioport_map_match(struct device dev, void res,
	153	void *match_data)
	154	{
	155	return (void *)res == match_data;
	156	}
	157
	158	/**
	159	* devm_ioport_map - Managed ioport_map()
	160	* @dev: Generic device to map ioport for
	161	* @port: Port to map
	162	* @nr: Number of ports to map
	163	*
	164	* Managed ioport_map(). Map is automatically unmapped on driver
	165	* detach.
	166	*/
5cbb00cc	167	void __iomem devm_ioport_map(struct device dev, unsigned long port,
5ea81769 AV	168	unsigned int nr)
	169	{
	170	void __iomem *ptr, addr;
	171
	172	ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
	173	if (!ptr)
	174	return NULL;
	175
	176	addr = ioport_map(port, nr);
	177	if (addr) {
	178	*ptr = addr;
	179	devres_add(dev, ptr);
	180	} else
	181	devres_free(ptr);
	182
	183	return addr;
	184	}
	185	EXPORT_SYMBOL(devm_ioport_map);
	186
	187	/**
	188	* devm_ioport_unmap - Managed ioport_unmap()
	189	* @dev: Generic device to unmap for
	190	* @addr: Address to unmap
	191	*
	192	* Managed ioport_unmap(). @addr must have been mapped using
	193	* devm_ioport_map().
	194	*/
	195	void devm_ioport_unmap(struct device dev, void __iomem addr)
	196	{
	197	ioport_unmap(addr);
	198	WARN_ON(devres_destroy(dev, devm_ioport_map_release,
b104d6a5	199	devm_ioport_map_match, (__force void *)addr));
5ea81769 AV	200	}
5ea81769 AV	201	EXPORT_SYMBOL(devm_ioport_unmap);
ce816fa8	202	#endif /* CONFIG_HAS_IOPORT_MAP */
5ea81769 AV	203
	204	#ifdef CONFIG_PCI
	205	/*
	206	* PCI iomap devres
	207	*/
	208	#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
	209
	210	struct pcim_iomap_devres {
	211	void __iomem *table[PCIM_IOMAP_MAX];
	212	};
	213
	214	static void pcim_iomap_release(struct device gendev, void res)
	215	{
	216	struct pci_dev *dev = container_of(gendev, struct pci_dev, dev);
	217	struct pcim_iomap_devres *this = res;
	218	int i;
	219
	220	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	221	if (this->table[i])
	222	pci_iounmap(dev, this->table[i]);
	223	}
	224
	225	/**
	226	* pcim_iomap_table - access iomap allocation table
	227	* @pdev: PCI device to access iomap table for
	228	*
	229	* Access iomap allocation table for @dev. If iomap table doesn't
	230	* exist and @pdev is managed, it will be allocated. All iomaps
	231	* recorded in the iomap table are automatically unmapped on driver
	232	* detach.
	233	*
	234	* This function might sleep when the table is first allocated but can
	235	* be safely called without context and guaranteed to succed once
	236	* allocated.
	237	*/
5cbb00cc	238	void __iomem * const pcim_iomap_table(struct pci_dev pdev)
5ea81769 AV	239	{
	240	struct pcim_iomap_devres dr, new_dr;
	241
	242	dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
	243	if (dr)
	244	return dr->table;
	245
	246	new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
	247	if (!new_dr)
	248	return NULL;
	249	dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
	250	return dr->table;
	251	}
	252	EXPORT_SYMBOL(pcim_iomap_table);
	253
	254	/**
	255	* pcim_iomap - Managed pcim_iomap()
	256	* @pdev: PCI device to iomap for
	257	* @bar: BAR to iomap
	258	* @maxlen: Maximum length of iomap
	259	*
	260	* Managed pci_iomap(). Map is automatically unmapped on driver
	261	* detach.
	262	*/
5cbb00cc	263	void __iomem pcim_iomap(struct pci_dev pdev, int bar, unsigned long maxlen)
5ea81769 AV	264	{
	265	void __iomem **tbl;
	266
	267	BUG_ON(bar >= PCIM_IOMAP_MAX);
	268
	269	tbl = (void __iomem **)pcim_iomap_table(pdev);
	270	if (!tbl \|\| tbl[bar]) /* duplicate mappings not allowed */
	271	return NULL;
	272
	273	tbl[bar] = pci_iomap(pdev, bar, maxlen);
	274	return tbl[bar];
	275	}
	276	EXPORT_SYMBOL(pcim_iomap);
	277
	278	/**
	279	* pcim_iounmap - Managed pci_iounmap()
	280	* @pdev: PCI device to iounmap for
	281	* @addr: Address to unmap
	282	*
	283	* Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
	284	*/
	285	void pcim_iounmap(struct pci_dev pdev, void __iomem addr)
	286	{
	287	void __iomem **tbl;
	288	int i;
	289
	290	pci_iounmap(pdev, addr);
	291
	292	tbl = (void __iomem **)pcim_iomap_table(pdev);
	293	BUG_ON(!tbl);
	294
	295	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	296	if (tbl[i] == addr) {
	297	tbl[i] = NULL;
	298	return;
	299	}
	300	WARN_ON(1);
	301	}
	302	EXPORT_SYMBOL(pcim_iounmap);
	303
	304	/**
	305	* pcim_iomap_regions - Request and iomap PCI BARs
	306	* @pdev: PCI device to map IO resources for
	307	* @mask: Mask of BARs to request and iomap
	308	* @name: Name used when requesting regions
	309	*
	310	* Request and iomap regions specified by @mask.
	311	*/
fb7ebfe4	312	int pcim_iomap_regions(struct pci_dev pdev, int mask, const char name)
5ea81769 AV	313	{
	314	void __iomem * const *iomap;
	315	int i, rc;
	316
	317	iomap = pcim_iomap_table(pdev);
	318	if (!iomap)
	319	return -ENOMEM;
	320
	321	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
	322	unsigned long len;
	323
	324	if (!(mask & (1 << i)))
	325	continue;
	326
	327	rc = -EINVAL;
	328	len = pci_resource_len(pdev, i);
	329	if (!len)
	330	goto err_inval;
	331
	332	rc = pci_request_region(pdev, i, name);
	333	if (rc)
fb4d64e7	334	goto err_inval;
5ea81769 AV	335
	336	rc = -ENOMEM;
	337	if (!pcim_iomap(pdev, i, 0))
fb4d64e7	338	goto err_region;
5ea81769 AV	339	}
	340
	341	return 0;
	342
5ea81769 AV	343	err_region:
	344	pci_release_region(pdev, i);
	345	err_inval:
	346	while (--i >= 0) {
fb4d64e7 FD	347	if (!(mask & (1 << i)))
fb4d64e7 FD	348	continue;
5ea81769 AV	349	pcim_iounmap(pdev, iomap[i]);
	350	pci_release_region(pdev, i);
	351	}
	352
	353	return rc;
	354	}
	355	EXPORT_SYMBOL(pcim_iomap_regions);
ec04b075	356
916fbfb7 TH	357	/**
	358	* pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
	359	* @pdev: PCI device to map IO resources for
	360	* @mask: Mask of BARs to iomap
	361	* @name: Name used when requesting regions
	362	*
	363	* Request all PCI BARs and iomap regions specified by @mask.
	364	*/
fb7ebfe4	365	int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
916fbfb7 TH	366	const char *name)
	367	{
	368	int request_mask = ((1 << 6) - 1) & ~mask;
	369	int rc;
	370
	371	rc = pci_request_selected_regions(pdev, request_mask, name);
	372	if (rc)
	373	return rc;
	374
	375	rc = pcim_iomap_regions(pdev, mask, name);
	376	if (rc)
	377	pci_release_selected_regions(pdev, request_mask);
	378	return rc;
	379	}
	380	EXPORT_SYMBOL(pcim_iomap_regions_request_all);
	381
ec04b075 TH	382	/**
	383	* pcim_iounmap_regions - Unmap and release PCI BARs
	384	* @pdev: PCI device to map IO resources for
	385	* @mask: Mask of BARs to unmap and release
	386	*
4d45ada3	387	* Unmap and release regions specified by @mask.
ec04b075	388	*/
fb7ebfe4	389	void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
ec04b075 TH	390	{
	391	void __iomem * const *iomap;
	392	int i;
	393
	394	iomap = pcim_iomap_table(pdev);
	395	if (!iomap)
	396	return;
	397
	398	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
	399	if (!(mask & (1 << i)))
	400	continue;
	401
	402	pcim_iounmap(pdev, iomap[i]);
	403	pci_release_region(pdev, i);
	404	}
	405	}
	406	EXPORT_SYMBOL(pcim_iounmap_regions);
571806a9	407	#endif /* CONFIG_PCI */