[linux.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>

enum devm_ioremap_type {
	DEVM_IOREMAP = 0,
	DEVM_IOREMAP_NC,
	DEVM_IOREMAP_WC,
};

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;
}

static void __iomem *__devm_ioremap(struct device *dev, resource_size_t offset,
				    resource_size_t size,
				    enum devm_ioremap_type type)
{
	void __iomem **ptr, *addr = NULL;

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

	switch (type) {
	case DEVM_IOREMAP:
		addr = ioremap(offset, size);
		break;
	case DEVM_IOREMAP_NC:
		addr = ioremap_nocache(offset, size);
		break;
	case DEVM_IOREMAP_WC:
		addr = ioremap_wc(offset, size);
		break;
	}

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

	return addr;
}

/**
 * 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)
{
	return __devm_ioremap(dev, offset, size, DEVM_IOREMAP);
}
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)
{
	return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_NC);
}
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)
{
	return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_WC);
}
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
1b723413 YX	8	enum devm_ioremap_type {
	9	DEVM_IOREMAP = 0,
	10	DEVM_IOREMAP_NC,
	11	DEVM_IOREMAP_WC,
	12	};
	13
b41e5fff	14	void devm_ioremap_release(struct device dev, void res)
5ea81769 AV	15	{
	16	iounmap((void __iomem *)res);
	17	}
	18
	19	static int devm_ioremap_match(struct device dev, void res, void *match_data)
	20	{
	21	return (void *)res == match_data;
	22	}
	23
1b723413 YX	24	static void __iomem __devm_ioremap(struct device dev, resource_size_t offset,
	25	resource_size_t size,
	26	enum devm_ioremap_type type)
5ea81769	27	{
1b723413	28	void __iomem *ptr, addr = NULL;
5ea81769 AV	29
	30	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
	31	if (!ptr)
	32	return NULL;
	33
1b723413 YX	34	switch (type) {
	35	case DEVM_IOREMAP:
	36	addr = ioremap(offset, size);
	37	break;
	38	case DEVM_IOREMAP_NC:
	39	addr = ioremap_nocache(offset, size);
	40	break;
	41	case DEVM_IOREMAP_WC:
	42	addr = ioremap_wc(offset, size);
	43	break;
	44	}
	45
5ea81769 AV	46	if (addr) {
	47	*ptr = addr;
	48	devres_add(dev, ptr);
	49	} else
	50	devres_free(ptr);
	51
	52	return addr;
	53	}
1b723413 YX	54
	55	/**
	56	* devm_ioremap - Managed ioremap()
	57	* @dev: Generic device to remap IO address for
	58	* @offset: Resource address to map
	59	* @size: Size of map
	60	*
	61	* Managed ioremap(). Map is automatically unmapped on driver detach.
	62	*/
	63	void __iomem devm_ioremap(struct device dev, resource_size_t offset,
	64	resource_size_t size)
	65	{
	66	return __devm_ioremap(dev, offset, size, DEVM_IOREMAP);
	67	}
5ea81769 AV	68	EXPORT_SYMBOL(devm_ioremap);
	69
	70	/**
	71	* devm_ioremap_nocache - Managed ioremap_nocache()
	72	* @dev: Generic device to remap IO address for
6524754e	73	* @offset: Resource address to map
5ea81769 AV	74	* @size: Size of map
	75	*
	76	* Managed ioremap_nocache(). Map is automatically unmapped on driver
	77	* detach.
	78	*/
4f452e8a	79	void __iomem devm_ioremap_nocache(struct device dev, resource_size_t offset,
5559b7bc	80	resource_size_t size)
5ea81769	81	{
1b723413	82	return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_NC);
5ea81769 AV	83	}
	84	EXPORT_SYMBOL(devm_ioremap_nocache);
	85
34644524 AK	86	/**
	87	* devm_ioremap_wc - Managed ioremap_wc()
	88	* @dev: Generic device to remap IO address for
6524754e	89	* @offset: Resource address to map
34644524 AK	90	* @size: Size of map
	91	*
	92	* Managed ioremap_wc(). Map is automatically unmapped on driver detach.
	93	*/
	94	void __iomem devm_ioremap_wc(struct device dev, resource_size_t offset,
	95	resource_size_t size)
	96	{
1b723413	97	return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_WC);
34644524 AK	98	}
	99	EXPORT_SYMBOL(devm_ioremap_wc);
	100
5ea81769 AV	101	/**
	102	* devm_iounmap - Managed iounmap()
	103	* @dev: Generic device to unmap for
	104	* @addr: Address to unmap
	105	*
	106	* Managed iounmap(). @addr must have been mapped using devm_ioremap*().
	107	*/
	108	void devm_iounmap(struct device dev, void __iomem addr)
	109	{
5ea81769	110	WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
b104d6a5	111	(__force void *)addr));
ae891a1b	112	iounmap(addr);
5ea81769 AV	113	}
	114	EXPORT_SYMBOL(devm_iounmap);
	115
72f8c0bf	116	/**
75096579 TR	117	* devm_ioremap_resource() - check, request region, and ioremap resource
75096579 TR	118	* @dev: generic device to handle the resource for
72f8c0bf WS	119	* @res: resource to be handled
72f8c0bf WS	120	*
92b19ff5 DW	121	* Checks that a resource is a valid memory region, requests the memory
	122	* region and ioremaps it. All operations are managed and will be undone
	123	* on driver detach.
75096579 TR	124	*
	125	* Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
	126	* on failure. Usage example:
72f8c0bf WS	127	*
72f8c0bf WS	128	* res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
75096579 TR	129	* base = devm_ioremap_resource(&pdev->dev, res);
	130	* if (IS_ERR(base))
	131	* return PTR_ERR(base);
72f8c0bf	132	*/
75096579	133	void __iomem devm_ioremap_resource(struct device dev, struct resource *res)
72f8c0bf WS	134	{
	135	resource_size_t size;
	136	const char *name;
	137	void __iomem *dest_ptr;
	138
	139	BUG_ON(!dev);
	140
	141	if (!res \|\| resource_type(res) != IORESOURCE_MEM) {
	142	dev_err(dev, "invalid resource\n");
b104d6a5	143	return IOMEM_ERR_PTR(-EINVAL);
72f8c0bf WS	144	}
	145
	146	size = resource_size(res);
	147	name = res->name ?: dev_name(dev);
	148
	149	if (!devm_request_mem_region(dev, res->start, size, name)) {
	150	dev_err(dev, "can't request region for resource %pR\n", res);
b104d6a5	151	return IOMEM_ERR_PTR(-EBUSY);
72f8c0bf WS	152	}
72f8c0bf WS	153
92b19ff5	154	dest_ptr = devm_ioremap(dev, res->start, size);
72f8c0bf WS	155	if (!dest_ptr) {
	156	dev_err(dev, "ioremap failed for resource %pR\n", res);
	157	devm_release_mem_region(dev, res->start, size);
b104d6a5	158	dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
72f8c0bf WS	159	}
	160
	161	return dest_ptr;
	162	}
75096579 TR	163	EXPORT_SYMBOL(devm_ioremap_resource);
75096579 TR	164
ce816fa8	165	#ifdef CONFIG_HAS_IOPORT_MAP
5ea81769 AV	166	/*
	167	* Generic iomap devres
	168	*/
	169	static void devm_ioport_map_release(struct device dev, void res)
	170	{
	171	ioport_unmap((void __iomem *)res);
	172	}
	173
	174	static int devm_ioport_map_match(struct device dev, void res,
	175	void *match_data)
	176	{
	177	return (void *)res == match_data;
	178	}
	179
	180	/**
	181	* devm_ioport_map - Managed ioport_map()
	182	* @dev: Generic device to map ioport for
	183	* @port: Port to map
	184	* @nr: Number of ports to map
	185	*
	186	* Managed ioport_map(). Map is automatically unmapped on driver
	187	* detach.
	188	*/
5cbb00cc	189	void __iomem devm_ioport_map(struct device dev, unsigned long port,
5ea81769 AV	190	unsigned int nr)
	191	{
	192	void __iomem *ptr, addr;
	193
	194	ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
	195	if (!ptr)
	196	return NULL;
	197
	198	addr = ioport_map(port, nr);
	199	if (addr) {
	200	*ptr = addr;
	201	devres_add(dev, ptr);
	202	} else
	203	devres_free(ptr);
	204
	205	return addr;
	206	}
	207	EXPORT_SYMBOL(devm_ioport_map);
	208
	209	/**
	210	* devm_ioport_unmap - Managed ioport_unmap()
	211	* @dev: Generic device to unmap for
	212	* @addr: Address to unmap
	213	*
	214	* Managed ioport_unmap(). @addr must have been mapped using
	215	* devm_ioport_map().
	216	*/
	217	void devm_ioport_unmap(struct device dev, void __iomem addr)
	218	{
	219	ioport_unmap(addr);
	220	WARN_ON(devres_destroy(dev, devm_ioport_map_release,
b104d6a5	221	devm_ioport_map_match, (__force void *)addr));
5ea81769 AV	222	}
5ea81769 AV	223	EXPORT_SYMBOL(devm_ioport_unmap);
ce816fa8	224	#endif /* CONFIG_HAS_IOPORT_MAP */
5ea81769 AV	225
	226	#ifdef CONFIG_PCI
	227	/*
	228	* PCI iomap devres
	229	*/
	230	#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
	231
	232	struct pcim_iomap_devres {
	233	void __iomem *table[PCIM_IOMAP_MAX];
	234	};
	235
	236	static void pcim_iomap_release(struct device gendev, void res)
	237	{
20af74ef	238	struct pci_dev *dev = to_pci_dev(gendev);
5ea81769 AV	239	struct pcim_iomap_devres *this = res;
	240	int i;
	241
	242	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	243	if (this->table[i])
	244	pci_iounmap(dev, this->table[i]);
	245	}
	246
	247	/**
	248	* pcim_iomap_table - access iomap allocation table
	249	* @pdev: PCI device to access iomap table for
	250	*
	251	* Access iomap allocation table for @dev. If iomap table doesn't
	252	* exist and @pdev is managed, it will be allocated. All iomaps
	253	* recorded in the iomap table are automatically unmapped on driver
	254	* detach.
	255	*
	256	* This function might sleep when the table is first allocated but can
	257	* be safely called without context and guaranteed to succed once
	258	* allocated.
	259	*/
5cbb00cc	260	void __iomem * const pcim_iomap_table(struct pci_dev pdev)
5ea81769 AV	261	{
	262	struct pcim_iomap_devres dr, new_dr;
	263
	264	dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
	265	if (dr)
	266	return dr->table;
	267
	268	new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
	269	if (!new_dr)
	270	return NULL;
	271	dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
	272	return dr->table;
	273	}
	274	EXPORT_SYMBOL(pcim_iomap_table);
	275
	276	/**
	277	* pcim_iomap - Managed pcim_iomap()
	278	* @pdev: PCI device to iomap for
	279	* @bar: BAR to iomap
	280	* @maxlen: Maximum length of iomap
	281	*
	282	* Managed pci_iomap(). Map is automatically unmapped on driver
	283	* detach.
	284	*/
5cbb00cc	285	void __iomem pcim_iomap(struct pci_dev pdev, int bar, unsigned long maxlen)
5ea81769 AV	286	{
	287	void __iomem **tbl;
	288
	289	BUG_ON(bar >= PCIM_IOMAP_MAX);
	290
	291	tbl = (void __iomem **)pcim_iomap_table(pdev);
	292	if (!tbl \|\| tbl[bar]) /* duplicate mappings not allowed */
	293	return NULL;
	294
	295	tbl[bar] = pci_iomap(pdev, bar, maxlen);
	296	return tbl[bar];
	297	}
	298	EXPORT_SYMBOL(pcim_iomap);
	299
	300	/**
	301	* pcim_iounmap - Managed pci_iounmap()
	302	* @pdev: PCI device to iounmap for
	303	* @addr: Address to unmap
	304	*
	305	* Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
	306	*/
	307	void pcim_iounmap(struct pci_dev pdev, void __iomem addr)
	308	{
	309	void __iomem **tbl;
	310	int i;
	311
	312	pci_iounmap(pdev, addr);
	313
	314	tbl = (void __iomem **)pcim_iomap_table(pdev);
	315	BUG_ON(!tbl);
	316
	317	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	318	if (tbl[i] == addr) {
	319	tbl[i] = NULL;
	320	return;
	321	}
	322	WARN_ON(1);
	323	}
	324	EXPORT_SYMBOL(pcim_iounmap);
	325
	326	/**
	327	* pcim_iomap_regions - Request and iomap PCI BARs
	328	* @pdev: PCI device to map IO resources for
	329	* @mask: Mask of BARs to request and iomap
	330	* @name: Name used when requesting regions
	331	*
	332	* Request and iomap regions specified by @mask.
	333	*/
fb7ebfe4	334	int pcim_iomap_regions(struct pci_dev pdev, int mask, const char name)
5ea81769 AV	335	{
	336	void __iomem * const *iomap;
	337	int i, rc;
	338
	339	iomap = pcim_iomap_table(pdev);
	340	if (!iomap)
	341	return -ENOMEM;
	342
	343	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
	344	unsigned long len;
	345
	346	if (!(mask & (1 << i)))
	347	continue;
	348
	349	rc = -EINVAL;
	350	len = pci_resource_len(pdev, i);
	351	if (!len)
	352	goto err_inval;
	353
	354	rc = pci_request_region(pdev, i, name);
	355	if (rc)
fb4d64e7	356	goto err_inval;
5ea81769 AV	357
	358	rc = -ENOMEM;
	359	if (!pcim_iomap(pdev, i, 0))
fb4d64e7	360	goto err_region;
5ea81769 AV	361	}
	362
	363	return 0;
	364
5ea81769 AV	365	err_region:
	366	pci_release_region(pdev, i);
	367	err_inval:
	368	while (--i >= 0) {
fb4d64e7 FD	369	if (!(mask & (1 << i)))
fb4d64e7 FD	370	continue;
5ea81769 AV	371	pcim_iounmap(pdev, iomap[i]);
	372	pci_release_region(pdev, i);
	373	}
	374
	375	return rc;
	376	}
	377	EXPORT_SYMBOL(pcim_iomap_regions);
ec04b075	378
916fbfb7 TH	379	/**
	380	* pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
	381	* @pdev: PCI device to map IO resources for
	382	* @mask: Mask of BARs to iomap
	383	* @name: Name used when requesting regions
	384	*
	385	* Request all PCI BARs and iomap regions specified by @mask.
	386	*/
fb7ebfe4	387	int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
916fbfb7 TH	388	const char *name)
	389	{
	390	int request_mask = ((1 << 6) - 1) & ~mask;
	391	int rc;
	392
	393	rc = pci_request_selected_regions(pdev, request_mask, name);
	394	if (rc)
	395	return rc;
	396
	397	rc = pcim_iomap_regions(pdev, mask, name);
	398	if (rc)
	399	pci_release_selected_regions(pdev, request_mask);
	400	return rc;
	401	}
	402	EXPORT_SYMBOL(pcim_iomap_regions_request_all);
	403
ec04b075 TH	404	/**
	405	* pcim_iounmap_regions - Unmap and release PCI BARs
	406	* @pdev: PCI device to map IO resources for
	407	* @mask: Mask of BARs to unmap and release
	408	*
4d45ada3	409	* Unmap and release regions specified by @mask.
ec04b075	410	*/
fb7ebfe4	411	void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
ec04b075 TH	412	{
	413	void __iomem * const *iomap;
	414	int i;
	415
	416	iomap = pcim_iomap_table(pdev);
	417	if (!iomap)
	418	return;
	419
1f35d04a	420	for (i = 0; i < PCIM_IOMAP_MAX; i++) {
ec04b075 TH	421	if (!(mask & (1 << i)))
	422	continue;
	423
	424	pcim_iounmap(pdev, iomap[i]);
	425	pci_release_region(pdev, i);
	426	}
	427	}
	428	EXPORT_SYMBOL(pcim_iounmap_regions);
571806a9	429	#endif /* CONFIG_PCI */