[linux-2.6-block.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>
#include <linux/of_address.h>

enum devm_ioremap_type {
	DEVM_IOREMAP = 0,
	DEVM_IOREMAP_UC,
	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_UC:
		addr = ioremap_uc(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_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)
{
	return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_UC);
}
EXPORT_SYMBOL_GPL(devm_ioremap_uc);

/**
 * 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);

static void __iomem *
__devm_ioremap_resource(struct device *dev, const struct resource *res,
			enum devm_ioremap_type type)
{
	resource_size_t size;
	void __iomem *dest_ptr;
	char *pretty_name;

	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);

	if (res->name)
		pretty_name = devm_kasprintf(dev, GFP_KERNEL, "%s %s",
					     dev_name(dev), res->name);
	else
		pretty_name = devm_kstrdup(dev, dev_name(dev), GFP_KERNEL);
	if (!pretty_name)
		return IOMEM_ERR_PTR(-ENOMEM);

	if (!devm_request_mem_region(dev, res->start, size, pretty_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, type);
	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;
}

/**
 * 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,
				    const struct resource *res)
{
	return __devm_ioremap_resource(dev, res, DEVM_IOREMAP);
}
EXPORT_SYMBOL(devm_ioremap_resource);

/**
 * devm_ioremap_resource_wc() - write-combined variant of
 *				devm_ioremap_resource()
 * @dev: generic device to handle the resource for
 * @res: resource to be handled
 *
 * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
 * on failure. Usage example:
 */
void __iomem *devm_ioremap_resource_wc(struct device *dev,
				       const struct resource *res)
{
	return __devm_ioremap_resource(dev, res, DEVM_IOREMAP_WC);
}

/*
 * devm_of_iomap - Requests a resource and maps the memory mapped IO
 *		   for a given device_node managed by a given device
 *
 * 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 of the device.
 *
 * This is to be used when a device requests/maps resources described
 * by other device tree nodes (children or otherwise).
 *
 * @dev:	The device "managing" the resource
 * @node:       The device-tree node where the resource resides
 * @index:	index of the MMIO range in the "reg" property
 * @size:	Returns the size of the resource (pass NULL if not needed)
 * Returns a pointer to the requested and mapped memory or an ERR_PTR() encoded
 * error code on failure. Usage example:
 *
 *	base = devm_of_iomap(&pdev->dev, node, 0, NULL);
 *	if (IS_ERR(base))
 *		return PTR_ERR(base);
 */
void __iomem *devm_of_iomap(struct device *dev, struct device_node *node, int index,
			    resource_size_t *size)
{
	struct resource res;

	if (of_address_to_resource(node, index, &res))
		return IOMEM_ERR_PTR(-EINVAL);
	if (size)
		*size = resource_size(&res);
	return devm_ioremap_resource(dev, &res);
}
EXPORT_SYMBOL(devm_of_iomap);

#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_STD_NUM_BARS

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>
d5e83827	7	#include <linux/of_address.h>
5ea81769	8
1b723413 YX	9	enum devm_ioremap_type {
1b723413 YX	10	DEVM_IOREMAP = 0,
e537654b	11	DEVM_IOREMAP_UC,
1b723413 YX	12	DEVM_IOREMAP_WC,
	13	};
	14
b41e5fff	15	void devm_ioremap_release(struct device dev, void res)
5ea81769 AV	16	{
	17	iounmap((void __iomem *)res);
	18	}
	19
	20	static int devm_ioremap_match(struct device dev, void res, void *match_data)
	21	{
	22	return (void *)res == match_data;
	23	}
	24
1b723413 YX	25	static void __iomem __devm_ioremap(struct device dev, resource_size_t offset,
	26	resource_size_t size,
	27	enum devm_ioremap_type type)
5ea81769	28	{
1b723413	29	void __iomem *ptr, addr = NULL;
5ea81769 AV	30
	31	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
	32	if (!ptr)
	33	return NULL;
	34
1b723413 YX	35	switch (type) {
	36	case DEVM_IOREMAP:
	37	addr = ioremap(offset, size);
	38	break;
e537654b TZ	39	case DEVM_IOREMAP_UC:
	40	addr = ioremap_uc(offset, size);
	41	break;
1b723413 YX	42	case DEVM_IOREMAP_WC:
	43	addr = ioremap_wc(offset, size);
	44	break;
	45	}
	46
5ea81769 AV	47	if (addr) {
	48	*ptr = addr;
	49	devres_add(dev, ptr);
	50	} else
	51	devres_free(ptr);
	52
	53	return addr;
	54	}
1b723413 YX	55
	56	/**
	57	* devm_ioremap - Managed ioremap()
	58	* @dev: Generic device to remap IO address for
	59	* @offset: Resource address to map
	60	* @size: Size of map
	61	*
	62	* Managed ioremap(). Map is automatically unmapped on driver detach.
	63	*/
	64	void __iomem devm_ioremap(struct device dev, resource_size_t offset,
	65	resource_size_t size)
	66	{
	67	return __devm_ioremap(dev, offset, size, DEVM_IOREMAP);
	68	}
5ea81769 AV	69	EXPORT_SYMBOL(devm_ioremap);
5ea81769 AV	70
e537654b TZ	71	/**
	72	* devm_ioremap_uc - Managed ioremap_uc()
	73	* @dev: Generic device to remap IO address for
	74	* @offset: Resource address to map
	75	* @size: Size of map
	76	*
	77	* Managed ioremap_uc(). Map is automatically unmapped on driver detach.
	78	*/
	79	void __iomem devm_ioremap_uc(struct device dev, resource_size_t offset,
	80	resource_size_t size)
	81	{
	82	return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_UC);
	83	}
	84	EXPORT_SYMBOL_GPL(devm_ioremap_uc);
	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
6e924822 BG	116	static void __iomem *
	117	__devm_ioremap_resource(struct device dev, const struct resource res,
	118	enum devm_ioremap_type type)
72f8c0bf WS	119	{
72f8c0bf WS	120	resource_size_t size;
72f8c0bf	121	void __iomem *dest_ptr;
35bd8c07	122	char *pretty_name;
72f8c0bf WS	123
	124	BUG_ON(!dev);
	125
	126	if (!res \|\| resource_type(res) != IORESOURCE_MEM) {
	127	dev_err(dev, "invalid resource\n");
b104d6a5	128	return IOMEM_ERR_PTR(-EINVAL);
72f8c0bf WS	129	}
	130
	131	size = resource_size(res);
72f8c0bf	132
35bd8c07 VO	133	if (res->name)
	134	pretty_name = devm_kasprintf(dev, GFP_KERNEL, "%s %s",
	135	dev_name(dev), res->name);
	136	else
	137	pretty_name = devm_kstrdup(dev, dev_name(dev), GFP_KERNEL);
	138	if (!pretty_name)
	139	return IOMEM_ERR_PTR(-ENOMEM);
	140
	141	if (!devm_request_mem_region(dev, res->start, size, pretty_name)) {
72f8c0bf	142	dev_err(dev, "can't request region for resource %pR\n", res);
b104d6a5	143	return IOMEM_ERR_PTR(-EBUSY);
72f8c0bf WS	144	}
72f8c0bf WS	145
6e924822	146	dest_ptr = __devm_ioremap(dev, res->start, size, type);
72f8c0bf WS	147	if (!dest_ptr) {
	148	dev_err(dev, "ioremap failed for resource %pR\n", res);
	149	devm_release_mem_region(dev, res->start, size);
b104d6a5	150	dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
72f8c0bf WS	151	}
	152
	153	return dest_ptr;
	154	}
6e924822 BG	155
	156	/**
	157	* devm_ioremap_resource() - check, request region, and ioremap resource
	158	* @dev: generic device to handle the resource for
	159	* @res: resource to be handled
	160	*
	161	* Checks that a resource is a valid memory region, requests the memory
	162	* region and ioremaps it. All operations are managed and will be undone
	163	* on driver detach.
	164	*
	165	* Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
	166	* on failure. Usage example:
	167	*
	168	* res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	169	* base = devm_ioremap_resource(&pdev->dev, res);
	170	* if (IS_ERR(base))
	171	* return PTR_ERR(base);
	172	*/
	173	void __iomem devm_ioremap_resource(struct device dev,
	174	const struct resource *res)
	175	{
	176	return __devm_ioremap_resource(dev, res, DEVM_IOREMAP);
	177	}
75096579 TR	178	EXPORT_SYMBOL(devm_ioremap_resource);
75096579 TR	179
b873af62 BG	180	/**
	181	* devm_ioremap_resource_wc() - write-combined variant of
	182	* devm_ioremap_resource()
	183	* @dev: generic device to handle the resource for
	184	* @res: resource to be handled
	185	*
	186	* Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
	187	* on failure. Usage example:
	188	*/
	189	void __iomem devm_ioremap_resource_wc(struct device dev,
	190	const struct resource *res)
	191	{
	192	return __devm_ioremap_resource(dev, res, DEVM_IOREMAP_WC);
	193	}
	194
d5e83827 BH	195	/*
	196	* devm_of_iomap - Requests a resource and maps the memory mapped IO
	197	* for a given device_node managed by a given device
	198	*
	199	* Checks that a resource is a valid memory region, requests the memory
	200	* region and ioremaps it. All operations are managed and will be undone
	201	* on driver detach of the device.
	202	*
	203	* This is to be used when a device requests/maps resources described
	204	* by other device tree nodes (children or otherwise).
	205	*
	206	* @dev: The device "managing" the resource
	207	* @node: The device-tree node where the resource resides
	208	* @index: index of the MMIO range in the "reg" property
	209	* @size: Returns the size of the resource (pass NULL if not needed)
	210	* Returns a pointer to the requested and mapped memory or an ERR_PTR() encoded
	211	* error code on failure. Usage example:
	212	*
	213	* base = devm_of_iomap(&pdev->dev, node, 0, NULL);
	214	* if (IS_ERR(base))
	215	* return PTR_ERR(base);
	216	*/
	217	void __iomem devm_of_iomap(struct device dev, struct device_node *node, int index,
	218	resource_size_t *size)
	219	{
	220	struct resource res;
	221
	222	if (of_address_to_resource(node, index, &res))
	223	return IOMEM_ERR_PTR(-EINVAL);
	224	if (size)
	225	*size = resource_size(&res);
	226	return devm_ioremap_resource(dev, &res);
	227	}
	228	EXPORT_SYMBOL(devm_of_iomap);
	229
ce816fa8	230	#ifdef CONFIG_HAS_IOPORT_MAP
5ea81769 AV	231	/*
	232	* Generic iomap devres
	233	*/
	234	static void devm_ioport_map_release(struct device dev, void res)
	235	{
	236	ioport_unmap((void __iomem *)res);
	237	}
	238
	239	static int devm_ioport_map_match(struct device dev, void res,
	240	void *match_data)
	241	{
	242	return (void *)res == match_data;
	243	}
	244
	245	/**
	246	* devm_ioport_map - Managed ioport_map()
	247	* @dev: Generic device to map ioport for
	248	* @port: Port to map
	249	* @nr: Number of ports to map
	250	*
	251	* Managed ioport_map(). Map is automatically unmapped on driver
	252	* detach.
	253	*/
5cbb00cc	254	void __iomem devm_ioport_map(struct device dev, unsigned long port,
5ea81769 AV	255	unsigned int nr)
	256	{
	257	void __iomem *ptr, addr;
	258
	259	ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
	260	if (!ptr)
	261	return NULL;
	262
	263	addr = ioport_map(port, nr);
	264	if (addr) {
	265	*ptr = addr;
	266	devres_add(dev, ptr);
	267	} else
	268	devres_free(ptr);
	269
	270	return addr;
	271	}
	272	EXPORT_SYMBOL(devm_ioport_map);
	273
	274	/**
	275	* devm_ioport_unmap - Managed ioport_unmap()
	276	* @dev: Generic device to unmap for
	277	* @addr: Address to unmap
	278	*
	279	* Managed ioport_unmap(). @addr must have been mapped using
	280	* devm_ioport_map().
	281	*/
	282	void devm_ioport_unmap(struct device dev, void __iomem addr)
	283	{
	284	ioport_unmap(addr);
	285	WARN_ON(devres_destroy(dev, devm_ioport_map_release,
b104d6a5	286	devm_ioport_map_match, (__force void *)addr));
5ea81769 AV	287	}
5ea81769 AV	288	EXPORT_SYMBOL(devm_ioport_unmap);
ce816fa8	289	#endif /* CONFIG_HAS_IOPORT_MAP */
5ea81769 AV	290
	291	#ifdef CONFIG_PCI
	292	/*
	293	* PCI iomap devres
	294	*/
c9c13ba4	295	#define PCIM_IOMAP_MAX PCI_STD_NUM_BARS
5ea81769 AV	296
	297	struct pcim_iomap_devres {
	298	void __iomem *table[PCIM_IOMAP_MAX];
	299	};
	300
	301	static void pcim_iomap_release(struct device gendev, void res)
	302	{
20af74ef	303	struct pci_dev *dev = to_pci_dev(gendev);
5ea81769 AV	304	struct pcim_iomap_devres *this = res;
	305	int i;
	306
	307	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	308	if (this->table[i])
	309	pci_iounmap(dev, this->table[i]);
	310	}
	311
	312	/**
	313	* pcim_iomap_table - access iomap allocation table
	314	* @pdev: PCI device to access iomap table for
	315	*
	316	* Access iomap allocation table for @dev. If iomap table doesn't
	317	* exist and @pdev is managed, it will be allocated. All iomaps
	318	* recorded in the iomap table are automatically unmapped on driver
	319	* detach.
	320	*
	321	* This function might sleep when the table is first allocated but can
	322	* be safely called without context and guaranteed to succed once
	323	* allocated.
	324	*/
5cbb00cc	325	void __iomem * const pcim_iomap_table(struct pci_dev pdev)
5ea81769 AV	326	{
	327	struct pcim_iomap_devres dr, new_dr;
	328
	329	dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
	330	if (dr)
	331	return dr->table;
	332
	333	new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
	334	if (!new_dr)
	335	return NULL;
	336	dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
	337	return dr->table;
	338	}
	339	EXPORT_SYMBOL(pcim_iomap_table);
	340
	341	/**
	342	* pcim_iomap - Managed pcim_iomap()
	343	* @pdev: PCI device to iomap for
	344	* @bar: BAR to iomap
	345	* @maxlen: Maximum length of iomap
	346	*
	347	* Managed pci_iomap(). Map is automatically unmapped on driver
	348	* detach.
	349	*/
5cbb00cc	350	void __iomem pcim_iomap(struct pci_dev pdev, int bar, unsigned long maxlen)
5ea81769 AV	351	{
	352	void __iomem **tbl;
	353
	354	BUG_ON(bar >= PCIM_IOMAP_MAX);
	355
	356	tbl = (void __iomem **)pcim_iomap_table(pdev);
	357	if (!tbl \|\| tbl[bar]) /* duplicate mappings not allowed */
	358	return NULL;
	359
	360	tbl[bar] = pci_iomap(pdev, bar, maxlen);
	361	return tbl[bar];
	362	}
	363	EXPORT_SYMBOL(pcim_iomap);
	364
	365	/**
	366	* pcim_iounmap - Managed pci_iounmap()
	367	* @pdev: PCI device to iounmap for
	368	* @addr: Address to unmap
	369	*
	370	* Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
	371	*/
	372	void pcim_iounmap(struct pci_dev pdev, void __iomem addr)
	373	{
	374	void __iomem **tbl;
	375	int i;
	376
	377	pci_iounmap(pdev, addr);
	378
	379	tbl = (void __iomem **)pcim_iomap_table(pdev);
	380	BUG_ON(!tbl);
	381
	382	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	383	if (tbl[i] == addr) {
	384	tbl[i] = NULL;
	385	return;
	386	}
	387	WARN_ON(1);
	388	}
	389	EXPORT_SYMBOL(pcim_iounmap);
	390
	391	/**
	392	* pcim_iomap_regions - Request and iomap PCI BARs
	393	* @pdev: PCI device to map IO resources for
	394	* @mask: Mask of BARs to request and iomap
	395	* @name: Name used when requesting regions
	396	*
	397	* Request and iomap regions specified by @mask.
	398	*/
fb7ebfe4	399	int pcim_iomap_regions(struct pci_dev pdev, int mask, const char name)
5ea81769 AV	400	{
	401	void __iomem * const *iomap;
	402	int i, rc;
	403
	404	iomap = pcim_iomap_table(pdev);
	405	if (!iomap)
	406	return -ENOMEM;
	407
	408	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
	409	unsigned long len;
	410
	411	if (!(mask & (1 << i)))
	412	continue;
	413
	414	rc = -EINVAL;
	415	len = pci_resource_len(pdev, i);
	416	if (!len)
	417	goto err_inval;
	418
	419	rc = pci_request_region(pdev, i, name);
	420	if (rc)
fb4d64e7	421	goto err_inval;
5ea81769 AV	422
	423	rc = -ENOMEM;
	424	if (!pcim_iomap(pdev, i, 0))
fb4d64e7	425	goto err_region;
5ea81769 AV	426	}
	427
	428	return 0;
	429
5ea81769 AV	430	err_region:
	431	pci_release_region(pdev, i);
	432	err_inval:
	433	while (--i >= 0) {
fb4d64e7 FD	434	if (!(mask & (1 << i)))
fb4d64e7 FD	435	continue;
5ea81769 AV	436	pcim_iounmap(pdev, iomap[i]);
	437	pci_release_region(pdev, i);
	438	}
	439
	440	return rc;
	441	}
	442	EXPORT_SYMBOL(pcim_iomap_regions);
ec04b075	443
916fbfb7 TH	444	/**
	445	* pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
	446	* @pdev: PCI device to map IO resources for
	447	* @mask: Mask of BARs to iomap
	448	* @name: Name used when requesting regions
	449	*
	450	* Request all PCI BARs and iomap regions specified by @mask.
	451	*/
fb7ebfe4	452	int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
916fbfb7 TH	453	const char *name)
	454	{
	455	int request_mask = ((1 << 6) - 1) & ~mask;
	456	int rc;
	457
	458	rc = pci_request_selected_regions(pdev, request_mask, name);
	459	if (rc)
	460	return rc;
	461
	462	rc = pcim_iomap_regions(pdev, mask, name);
	463	if (rc)
	464	pci_release_selected_regions(pdev, request_mask);
	465	return rc;
	466	}
	467	EXPORT_SYMBOL(pcim_iomap_regions_request_all);
	468
ec04b075 TH	469	/**
	470	* pcim_iounmap_regions - Unmap and release PCI BARs
	471	* @pdev: PCI device to map IO resources for
	472	* @mask: Mask of BARs to unmap and release
	473	*
4d45ada3	474	* Unmap and release regions specified by @mask.
ec04b075	475	*/
fb7ebfe4	476	void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
ec04b075 TH	477	{
	478	void __iomem * const *iomap;
	479	int i;
	480
	481	iomap = pcim_iomap_table(pdev);
	482	if (!iomap)
	483	return;
	484
1f35d04a	485	for (i = 0; i < PCIM_IOMAP_MAX; i++) {
ec04b075 TH	486	if (!(mask & (1 << i)))
	487	continue;
	488
	489	pcim_iounmap(pdev, iomap[i]);
	490	pci_release_region(pdev, i);
	491	}
	492	}
	493	EXPORT_SYMBOL(pcim_iounmap_regions);
571806a9	494	#endif /* CONFIG_PCI */