[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_uc - Managed ioremap_uc()
 * @dev: Generic device to remap IO address for
 * @offset: Resource address to map
 * @size: Size of map
 *
 * Managed ioremap_uc().  Map is automatically unmapped on driver detach.
 */
void __iomem *devm_ioremap_uc(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_uc(offset, size);
	if (addr) {
		*ptr = addr;
		devres_add(dev, ptr);
	} else
		devres_free(ptr);

	return addr;
}
EXPORT_SYMBOL(devm_ioremap_uc);


/**
 * 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
933d4644 AK	46	/**
	47	* devm_ioremap_uc - Managed ioremap_uc()
	48	* @dev: Generic device to remap IO address for
	49	* @offset: Resource address to map
	50	* @size: Size of map
	51	*
	52	* Managed ioremap_uc(). Map is automatically unmapped on driver detach.
	53	*/
	54	void __iomem devm_ioremap_uc(struct device dev, resource_size_t offset,
	55	resource_size_t size)
	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_uc(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_uc);
	73
	74
5ea81769 AV	75	/**
	76	* devm_ioremap_nocache - Managed ioremap_nocache()
	77	* @dev: Generic device to remap IO address for
6524754e	78	* @offset: Resource address to map
5ea81769 AV	79	* @size: Size of map
	80	*
	81	* Managed ioremap_nocache(). Map is automatically unmapped on driver
	82	* detach.
	83	*/
4f452e8a	84	void __iomem devm_ioremap_nocache(struct device dev, resource_size_t offset,
5559b7bc	85	resource_size_t size)
5ea81769 AV	86	{
	87	void __iomem *ptr, addr;
	88
	89	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
	90	if (!ptr)
	91	return NULL;
	92
	93	addr = ioremap_nocache(offset, size);
	94	if (addr) {
	95	*ptr = addr;
	96	devres_add(dev, ptr);
	97	} else
	98	devres_free(ptr);
	99
	100	return addr;
	101	}
	102	EXPORT_SYMBOL(devm_ioremap_nocache);
	103
34644524 AK	104	/**
	105	* devm_ioremap_wc - Managed ioremap_wc()
	106	* @dev: Generic device to remap IO address for
6524754e	107	* @offset: Resource address to map
34644524 AK	108	* @size: Size of map
	109	*
	110	* Managed ioremap_wc(). Map is automatically unmapped on driver detach.
	111	*/
	112	void __iomem devm_ioremap_wc(struct device dev, resource_size_t offset,
	113	resource_size_t size)
	114	{
	115	void __iomem *ptr, addr;
	116
	117	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
	118	if (!ptr)
	119	return NULL;
	120
	121	addr = ioremap_wc(offset, size);
	122	if (addr) {
	123	*ptr = addr;
	124	devres_add(dev, ptr);
	125	} else
	126	devres_free(ptr);
	127
	128	return addr;
	129	}
	130	EXPORT_SYMBOL(devm_ioremap_wc);
	131
5ea81769 AV	132	/**
	133	* devm_iounmap - Managed iounmap()
	134	* @dev: Generic device to unmap for
	135	* @addr: Address to unmap
	136	*
	137	* Managed iounmap(). @addr must have been mapped using devm_ioremap*().
	138	*/
	139	void devm_iounmap(struct device dev, void __iomem addr)
	140	{
5ea81769	141	WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
b104d6a5	142	(__force void *)addr));
ae891a1b	143	iounmap(addr);
5ea81769 AV	144	}
	145	EXPORT_SYMBOL(devm_iounmap);
	146
72f8c0bf	147	/**
75096579 TR	148	* devm_ioremap_resource() - check, request region, and ioremap resource
75096579 TR	149	* @dev: generic device to handle the resource for
72f8c0bf WS	150	* @res: resource to be handled
72f8c0bf WS	151	*
92b19ff5 DW	152	* Checks that a resource is a valid memory region, requests the memory
	153	* region and ioremaps it. All operations are managed and will be undone
	154	* on driver detach.
75096579 TR	155	*
	156	* Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
	157	* on failure. Usage example:
72f8c0bf WS	158	*
72f8c0bf WS	159	* res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
75096579 TR	160	* base = devm_ioremap_resource(&pdev->dev, res);
	161	* if (IS_ERR(base))
	162	* return PTR_ERR(base);
72f8c0bf	163	*/
75096579	164	void __iomem devm_ioremap_resource(struct device dev, struct resource *res)
72f8c0bf WS	165	{
	166	resource_size_t size;
	167	const char *name;
	168	void __iomem *dest_ptr;
	169
	170	BUG_ON(!dev);
	171
	172	if (!res \|\| resource_type(res) != IORESOURCE_MEM) {
	173	dev_err(dev, "invalid resource\n");
b104d6a5	174	return IOMEM_ERR_PTR(-EINVAL);
72f8c0bf WS	175	}
	176
	177	size = resource_size(res);
	178	name = res->name ?: dev_name(dev);
	179
	180	if (!devm_request_mem_region(dev, res->start, size, name)) {
	181	dev_err(dev, "can't request region for resource %pR\n", res);
b104d6a5	182	return IOMEM_ERR_PTR(-EBUSY);
72f8c0bf WS	183	}
72f8c0bf WS	184
92b19ff5	185	dest_ptr = devm_ioremap(dev, res->start, size);
72f8c0bf WS	186	if (!dest_ptr) {
	187	dev_err(dev, "ioremap failed for resource %pR\n", res);
	188	devm_release_mem_region(dev, res->start, size);
b104d6a5	189	dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
72f8c0bf WS	190	}
	191
	192	return dest_ptr;
	193	}
75096579 TR	194	EXPORT_SYMBOL(devm_ioremap_resource);
75096579 TR	195
ce816fa8	196	#ifdef CONFIG_HAS_IOPORT_MAP
5ea81769 AV	197	/*
	198	* Generic iomap devres
	199	*/
	200	static void devm_ioport_map_release(struct device dev, void res)
	201	{
	202	ioport_unmap((void __iomem *)res);
	203	}
	204
	205	static int devm_ioport_map_match(struct device dev, void res,
	206	void *match_data)
	207	{
	208	return (void *)res == match_data;
	209	}
	210
	211	/**
	212	* devm_ioport_map - Managed ioport_map()
	213	* @dev: Generic device to map ioport for
	214	* @port: Port to map
	215	* @nr: Number of ports to map
	216	*
	217	* Managed ioport_map(). Map is automatically unmapped on driver
	218	* detach.
	219	*/
5cbb00cc	220	void __iomem devm_ioport_map(struct device dev, unsigned long port,
5ea81769 AV	221	unsigned int nr)
	222	{
	223	void __iomem *ptr, addr;
	224
	225	ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
	226	if (!ptr)
	227	return NULL;
	228
	229	addr = ioport_map(port, nr);
	230	if (addr) {
	231	*ptr = addr;
	232	devres_add(dev, ptr);
	233	} else
	234	devres_free(ptr);
	235
	236	return addr;
	237	}
	238	EXPORT_SYMBOL(devm_ioport_map);
	239
	240	/**
	241	* devm_ioport_unmap - Managed ioport_unmap()
	242	* @dev: Generic device to unmap for
	243	* @addr: Address to unmap
	244	*
	245	* Managed ioport_unmap(). @addr must have been mapped using
	246	* devm_ioport_map().
	247	*/
	248	void devm_ioport_unmap(struct device dev, void __iomem addr)
	249	{
	250	ioport_unmap(addr);
	251	WARN_ON(devres_destroy(dev, devm_ioport_map_release,
b104d6a5	252	devm_ioport_map_match, (__force void *)addr));
5ea81769 AV	253	}
5ea81769 AV	254	EXPORT_SYMBOL(devm_ioport_unmap);
ce816fa8	255	#endif /* CONFIG_HAS_IOPORT_MAP */
5ea81769 AV	256
	257	#ifdef CONFIG_PCI
	258	/*
	259	* PCI iomap devres
	260	*/
	261	#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
	262
	263	struct pcim_iomap_devres {
	264	void __iomem *table[PCIM_IOMAP_MAX];
	265	};
	266
	267	static void pcim_iomap_release(struct device gendev, void res)
	268	{
20af74ef	269	struct pci_dev *dev = to_pci_dev(gendev);
5ea81769 AV	270	struct pcim_iomap_devres *this = res;
	271	int i;
	272
	273	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	274	if (this->table[i])
	275	pci_iounmap(dev, this->table[i]);
	276	}
	277
	278	/**
	279	* pcim_iomap_table - access iomap allocation table
	280	* @pdev: PCI device to access iomap table for
	281	*
	282	* Access iomap allocation table for @dev. If iomap table doesn't
	283	* exist and @pdev is managed, it will be allocated. All iomaps
	284	* recorded in the iomap table are automatically unmapped on driver
	285	* detach.
	286	*
	287	* This function might sleep when the table is first allocated but can
	288	* be safely called without context and guaranteed to succed once
	289	* allocated.
	290	*/
5cbb00cc	291	void __iomem * const pcim_iomap_table(struct pci_dev pdev)
5ea81769 AV	292	{
	293	struct pcim_iomap_devres dr, new_dr;
	294
	295	dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
	296	if (dr)
	297	return dr->table;
	298
	299	new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
	300	if (!new_dr)
	301	return NULL;
	302	dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
	303	return dr->table;
	304	}
	305	EXPORT_SYMBOL(pcim_iomap_table);
	306
	307	/**
	308	* pcim_iomap - Managed pcim_iomap()
	309	* @pdev: PCI device to iomap for
	310	* @bar: BAR to iomap
	311	* @maxlen: Maximum length of iomap
	312	*
	313	* Managed pci_iomap(). Map is automatically unmapped on driver
	314	* detach.
	315	*/
5cbb00cc	316	void __iomem pcim_iomap(struct pci_dev pdev, int bar, unsigned long maxlen)
5ea81769 AV	317	{
	318	void __iomem **tbl;
	319
	320	BUG_ON(bar >= PCIM_IOMAP_MAX);
	321
	322	tbl = (void __iomem **)pcim_iomap_table(pdev);
	323	if (!tbl \|\| tbl[bar]) /* duplicate mappings not allowed */
	324	return NULL;
	325
	326	tbl[bar] = pci_iomap(pdev, bar, maxlen);
	327	return tbl[bar];
	328	}
	329	EXPORT_SYMBOL(pcim_iomap);
	330
	331	/**
	332	* pcim_iounmap - Managed pci_iounmap()
	333	* @pdev: PCI device to iounmap for
	334	* @addr: Address to unmap
	335	*
	336	* Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
	337	*/
	338	void pcim_iounmap(struct pci_dev pdev, void __iomem addr)
	339	{
	340	void __iomem **tbl;
	341	int i;
	342
	343	pci_iounmap(pdev, addr);
	344
	345	tbl = (void __iomem **)pcim_iomap_table(pdev);
	346	BUG_ON(!tbl);
	347
	348	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	349	if (tbl[i] == addr) {
	350	tbl[i] = NULL;
	351	return;
	352	}
	353	WARN_ON(1);
	354	}
	355	EXPORT_SYMBOL(pcim_iounmap);
	356
	357	/**
	358	* pcim_iomap_regions - Request and iomap PCI BARs
	359	* @pdev: PCI device to map IO resources for
	360	* @mask: Mask of BARs to request and iomap
	361	* @name: Name used when requesting regions
	362	*
	363	* Request and iomap regions specified by @mask.
	364	*/
fb7ebfe4	365	int pcim_iomap_regions(struct pci_dev pdev, int mask, const char name)
5ea81769 AV	366	{
	367	void __iomem * const *iomap;
	368	int i, rc;
	369
	370	iomap = pcim_iomap_table(pdev);
	371	if (!iomap)
	372	return -ENOMEM;
	373
	374	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
	375	unsigned long len;
	376
	377	if (!(mask & (1 << i)))
	378	continue;
	379
	380	rc = -EINVAL;
	381	len = pci_resource_len(pdev, i);
	382	if (!len)
	383	goto err_inval;
	384
	385	rc = pci_request_region(pdev, i, name);
	386	if (rc)
fb4d64e7	387	goto err_inval;
5ea81769 AV	388
	389	rc = -ENOMEM;
	390	if (!pcim_iomap(pdev, i, 0))
fb4d64e7	391	goto err_region;
5ea81769 AV	392	}
	393
	394	return 0;
	395
5ea81769 AV	396	err_region:
	397	pci_release_region(pdev, i);
	398	err_inval:
	399	while (--i >= 0) {
fb4d64e7 FD	400	if (!(mask & (1 << i)))
fb4d64e7 FD	401	continue;
5ea81769 AV	402	pcim_iounmap(pdev, iomap[i]);
	403	pci_release_region(pdev, i);
	404	}
	405
	406	return rc;
	407	}
	408	EXPORT_SYMBOL(pcim_iomap_regions);
ec04b075	409
916fbfb7 TH	410	/**
	411	* pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
	412	* @pdev: PCI device to map IO resources for
	413	* @mask: Mask of BARs to iomap
	414	* @name: Name used when requesting regions
	415	*
	416	* Request all PCI BARs and iomap regions specified by @mask.
	417	*/
fb7ebfe4	418	int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
916fbfb7 TH	419	const char *name)
	420	{
	421	int request_mask = ((1 << 6) - 1) & ~mask;
	422	int rc;
	423
	424	rc = pci_request_selected_regions(pdev, request_mask, name);
	425	if (rc)
	426	return rc;
	427
	428	rc = pcim_iomap_regions(pdev, mask, name);
	429	if (rc)
	430	pci_release_selected_regions(pdev, request_mask);
	431	return rc;
	432	}
	433	EXPORT_SYMBOL(pcim_iomap_regions_request_all);
	434
ec04b075 TH	435	/**
	436	* pcim_iounmap_regions - Unmap and release PCI BARs
	437	* @pdev: PCI device to map IO resources for
	438	* @mask: Mask of BARs to unmap and release
	439	*
4d45ada3	440	* Unmap and release regions specified by @mask.
ec04b075	441	*/
fb7ebfe4	442	void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
ec04b075 TH	443	{
	444	void __iomem * const *iomap;
	445	int i;
	446
	447	iomap = pcim_iomap_table(pdev);
	448	if (!iomap)
	449	return;
	450
1f35d04a	451	for (i = 0; i < PCIM_IOMAP_MAX; i++) {
ec04b075 TH	452	if (!(mask & (1 << i)))
	453	continue;
	454
	455	pcim_iounmap(pdev, iomap[i]);
	456	pci_release_region(pdev, i);
	457	}
	458	}
	459	EXPORT_SYMBOL(pcim_iounmap_regions);
571806a9	460	#endif /* CONFIG_PCI */