[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_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);

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;

	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 (!devm_request_mem_region(dev, res->start, size, dev_name(dev))) {
		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_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>
d5e83827	7	#include <linux/of_address.h>
5ea81769	8
1b723413 YX	9	enum devm_ioremap_type {
	10	DEVM_IOREMAP = 0,
	11	DEVM_IOREMAP_NC,
	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;
	39	case DEVM_IOREMAP_NC:
	40	addr = ioremap_nocache(offset, size);
	41	break;
	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);
	70
	71	/**
	72	* devm_ioremap_nocache - Managed ioremap_nocache()
	73	* @dev: Generic device to remap IO address for
6524754e	74	* @offset: Resource address to map
5ea81769 AV	75	* @size: Size of map
	76	*
	77	* Managed ioremap_nocache(). Map is automatically unmapped on driver
	78	* detach.
	79	*/
4f452e8a	80	void __iomem devm_ioremap_nocache(struct device dev, resource_size_t offset,
5559b7bc	81	resource_size_t size)
5ea81769	82	{
1b723413	83	return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_NC);
5ea81769 AV	84	}
	85	EXPORT_SYMBOL(devm_ioremap_nocache);
	86
34644524 AK	87	/**
	88	* devm_ioremap_wc - Managed ioremap_wc()
	89	* @dev: Generic device to remap IO address for
6524754e	90	* @offset: Resource address to map
34644524 AK	91	* @size: Size of map
	92	*
	93	* Managed ioremap_wc(). Map is automatically unmapped on driver detach.
	94	*/
	95	void __iomem devm_ioremap_wc(struct device dev, resource_size_t offset,
	96	resource_size_t size)
	97	{
1b723413	98	return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_WC);
34644524 AK	99	}
	100	EXPORT_SYMBOL(devm_ioremap_wc);
	101
5ea81769 AV	102	/**
	103	* devm_iounmap - Managed iounmap()
	104	* @dev: Generic device to unmap for
	105	* @addr: Address to unmap
	106	*
	107	* Managed iounmap(). @addr must have been mapped using devm_ioremap*().
	108	*/
	109	void devm_iounmap(struct device dev, void __iomem addr)
	110	{
5ea81769	111	WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
b104d6a5	112	(__force void *)addr));
ae891a1b	113	iounmap(addr);
5ea81769 AV	114	}
	115	EXPORT_SYMBOL(devm_iounmap);
	116
6e924822 BG	117	static void __iomem *
	118	__devm_ioremap_resource(struct device dev, const struct resource res,
	119	enum devm_ioremap_type type)
72f8c0bf WS	120	{
72f8c0bf WS	121	resource_size_t size;
72f8c0bf WS	122	void __iomem *dest_ptr;
	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
8d84b18f	133	if (!devm_request_mem_region(dev, res->start, size, dev_name(dev))) {
72f8c0bf	134	dev_err(dev, "can't request region for resource %pR\n", res);
b104d6a5	135	return IOMEM_ERR_PTR(-EBUSY);
72f8c0bf WS	136	}
72f8c0bf WS	137
6e924822	138	dest_ptr = __devm_ioremap(dev, res->start, size, type);
72f8c0bf WS	139	if (!dest_ptr) {
	140	dev_err(dev, "ioremap failed for resource %pR\n", res);
	141	devm_release_mem_region(dev, res->start, size);
b104d6a5	142	dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
72f8c0bf WS	143	}
	144
	145	return dest_ptr;
	146	}
6e924822 BG	147
	148	/**
	149	* devm_ioremap_resource() - check, request region, and ioremap resource
	150	* @dev: generic device to handle the resource for
	151	* @res: resource to be handled
	152	*
	153	* Checks that a resource is a valid memory region, requests the memory
	154	* region and ioremaps it. All operations are managed and will be undone
	155	* on driver detach.
	156	*
	157	* Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
	158	* on failure. Usage example:
	159	*
	160	* res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	161	* base = devm_ioremap_resource(&pdev->dev, res);
	162	* if (IS_ERR(base))
	163	* return PTR_ERR(base);
	164	*/
	165	void __iomem devm_ioremap_resource(struct device dev,
	166	const struct resource *res)
	167	{
	168	return __devm_ioremap_resource(dev, res, DEVM_IOREMAP);
	169	}
75096579 TR	170	EXPORT_SYMBOL(devm_ioremap_resource);
75096579 TR	171
b873af62 BG	172	/**
	173	* devm_ioremap_resource_wc() - write-combined variant of
	174	* devm_ioremap_resource()
	175	* @dev: generic device to handle the resource for
	176	* @res: resource to be handled
	177	*
	178	* Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
	179	* on failure. Usage example:
	180	*/
	181	void __iomem devm_ioremap_resource_wc(struct device dev,
	182	const struct resource *res)
	183	{
	184	return __devm_ioremap_resource(dev, res, DEVM_IOREMAP_WC);
	185	}
	186
d5e83827 BH	187	/*
	188	* devm_of_iomap - Requests a resource and maps the memory mapped IO
	189	* for a given device_node managed by a given device
	190	*
	191	* Checks that a resource is a valid memory region, requests the memory
	192	* region and ioremaps it. All operations are managed and will be undone
	193	* on driver detach of the device.
	194	*
	195	* This is to be used when a device requests/maps resources described
	196	* by other device tree nodes (children or otherwise).
	197	*
	198	* @dev: The device "managing" the resource
	199	* @node: The device-tree node where the resource resides
	200	* @index: index of the MMIO range in the "reg" property
	201	* @size: Returns the size of the resource (pass NULL if not needed)
	202	* Returns a pointer to the requested and mapped memory or an ERR_PTR() encoded
	203	* error code on failure. Usage example:
	204	*
	205	* base = devm_of_iomap(&pdev->dev, node, 0, NULL);
	206	* if (IS_ERR(base))
	207	* return PTR_ERR(base);
	208	*/
	209	void __iomem devm_of_iomap(struct device dev, struct device_node *node, int index,
	210	resource_size_t *size)
	211	{
	212	struct resource res;
	213
	214	if (of_address_to_resource(node, index, &res))
	215	return IOMEM_ERR_PTR(-EINVAL);
	216	if (size)
	217	*size = resource_size(&res);
	218	return devm_ioremap_resource(dev, &res);
	219	}
	220	EXPORT_SYMBOL(devm_of_iomap);
	221
ce816fa8	222	#ifdef CONFIG_HAS_IOPORT_MAP
5ea81769 AV	223	/*
	224	* Generic iomap devres
	225	*/
	226	static void devm_ioport_map_release(struct device dev, void res)
	227	{
	228	ioport_unmap((void __iomem *)res);
	229	}
	230
	231	static int devm_ioport_map_match(struct device dev, void res,
	232	void *match_data)
	233	{
	234	return (void *)res == match_data;
	235	}
	236
	237	/**
	238	* devm_ioport_map - Managed ioport_map()
	239	* @dev: Generic device to map ioport for
	240	* @port: Port to map
	241	* @nr: Number of ports to map
	242	*
	243	* Managed ioport_map(). Map is automatically unmapped on driver
	244	* detach.
	245	*/
5cbb00cc	246	void __iomem devm_ioport_map(struct device dev, unsigned long port,
5ea81769 AV	247	unsigned int nr)
	248	{
	249	void __iomem *ptr, addr;
	250
	251	ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
	252	if (!ptr)
	253	return NULL;
	254
	255	addr = ioport_map(port, nr);
	256	if (addr) {
	257	*ptr = addr;
	258	devres_add(dev, ptr);
	259	} else
	260	devres_free(ptr);
	261
	262	return addr;
	263	}
	264	EXPORT_SYMBOL(devm_ioport_map);
	265
	266	/**
	267	* devm_ioport_unmap - Managed ioport_unmap()
	268	* @dev: Generic device to unmap for
	269	* @addr: Address to unmap
	270	*
	271	* Managed ioport_unmap(). @addr must have been mapped using
	272	* devm_ioport_map().
	273	*/
	274	void devm_ioport_unmap(struct device dev, void __iomem addr)
	275	{
	276	ioport_unmap(addr);
	277	WARN_ON(devres_destroy(dev, devm_ioport_map_release,
b104d6a5	278	devm_ioport_map_match, (__force void *)addr));
5ea81769 AV	279	}
5ea81769 AV	280	EXPORT_SYMBOL(devm_ioport_unmap);
ce816fa8	281	#endif /* CONFIG_HAS_IOPORT_MAP */
5ea81769 AV	282
	283	#ifdef CONFIG_PCI
	284	/*
	285	* PCI iomap devres
	286	*/
	287	#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
	288
	289	struct pcim_iomap_devres {
	290	void __iomem *table[PCIM_IOMAP_MAX];
	291	};
	292
	293	static void pcim_iomap_release(struct device gendev, void res)
	294	{
20af74ef	295	struct pci_dev *dev = to_pci_dev(gendev);
5ea81769 AV	296	struct pcim_iomap_devres *this = res;
	297	int i;
	298
	299	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	300	if (this->table[i])
	301	pci_iounmap(dev, this->table[i]);
	302	}
	303
	304	/**
	305	* pcim_iomap_table - access iomap allocation table
	306	* @pdev: PCI device to access iomap table for
	307	*
	308	* Access iomap allocation table for @dev. If iomap table doesn't
	309	* exist and @pdev is managed, it will be allocated. All iomaps
	310	* recorded in the iomap table are automatically unmapped on driver
	311	* detach.
	312	*
	313	* This function might sleep when the table is first allocated but can
	314	* be safely called without context and guaranteed to succed once
	315	* allocated.
	316	*/
5cbb00cc	317	void __iomem * const pcim_iomap_table(struct pci_dev pdev)
5ea81769 AV	318	{
	319	struct pcim_iomap_devres dr, new_dr;
	320
	321	dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
	322	if (dr)
	323	return dr->table;
	324
	325	new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
	326	if (!new_dr)
	327	return NULL;
	328	dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
	329	return dr->table;
	330	}
	331	EXPORT_SYMBOL(pcim_iomap_table);
	332
	333	/**
	334	* pcim_iomap - Managed pcim_iomap()
	335	* @pdev: PCI device to iomap for
	336	* @bar: BAR to iomap
	337	* @maxlen: Maximum length of iomap
	338	*
	339	* Managed pci_iomap(). Map is automatically unmapped on driver
	340	* detach.
	341	*/
5cbb00cc	342	void __iomem pcim_iomap(struct pci_dev pdev, int bar, unsigned long maxlen)
5ea81769 AV	343	{
	344	void __iomem **tbl;
	345
	346	BUG_ON(bar >= PCIM_IOMAP_MAX);
	347
	348	tbl = (void __iomem **)pcim_iomap_table(pdev);
	349	if (!tbl \|\| tbl[bar]) /* duplicate mappings not allowed */
	350	return NULL;
	351
	352	tbl[bar] = pci_iomap(pdev, bar, maxlen);
	353	return tbl[bar];
	354	}
	355	EXPORT_SYMBOL(pcim_iomap);
	356
	357	/**
	358	* pcim_iounmap - Managed pci_iounmap()
	359	* @pdev: PCI device to iounmap for
	360	* @addr: Address to unmap
	361	*
	362	* Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
	363	*/
	364	void pcim_iounmap(struct pci_dev pdev, void __iomem addr)
	365	{
	366	void __iomem **tbl;
	367	int i;
	368
	369	pci_iounmap(pdev, addr);
	370
	371	tbl = (void __iomem **)pcim_iomap_table(pdev);
	372	BUG_ON(!tbl);
	373
	374	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	375	if (tbl[i] == addr) {
	376	tbl[i] = NULL;
	377	return;
	378	}
	379	WARN_ON(1);
	380	}
	381	EXPORT_SYMBOL(pcim_iounmap);
	382
	383	/**
	384	* pcim_iomap_regions - Request and iomap PCI BARs
	385	* @pdev: PCI device to map IO resources for
	386	* @mask: Mask of BARs to request and iomap
	387	* @name: Name used when requesting regions
	388	*
	389	* Request and iomap regions specified by @mask.
	390	*/
fb7ebfe4	391	int pcim_iomap_regions(struct pci_dev pdev, int mask, const char name)
5ea81769 AV	392	{
	393	void __iomem * const *iomap;
	394	int i, rc;
	395
	396	iomap = pcim_iomap_table(pdev);
	397	if (!iomap)
	398	return -ENOMEM;
	399
	400	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
	401	unsigned long len;
	402
	403	if (!(mask & (1 << i)))
	404	continue;
	405
	406	rc = -EINVAL;
	407	len = pci_resource_len(pdev, i);
	408	if (!len)
	409	goto err_inval;
	410
	411	rc = pci_request_region(pdev, i, name);
	412	if (rc)
fb4d64e7	413	goto err_inval;
5ea81769 AV	414
	415	rc = -ENOMEM;
	416	if (!pcim_iomap(pdev, i, 0))
fb4d64e7	417	goto err_region;
5ea81769 AV	418	}
	419
	420	return 0;
	421
5ea81769 AV	422	err_region:
	423	pci_release_region(pdev, i);
	424	err_inval:
	425	while (--i >= 0) {
fb4d64e7 FD	426	if (!(mask & (1 << i)))
fb4d64e7 FD	427	continue;
5ea81769 AV	428	pcim_iounmap(pdev, iomap[i]);
	429	pci_release_region(pdev, i);
	430	}
	431
	432	return rc;
	433	}
	434	EXPORT_SYMBOL(pcim_iomap_regions);
ec04b075	435
916fbfb7 TH	436	/**
	437	* pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
	438	* @pdev: PCI device to map IO resources for
	439	* @mask: Mask of BARs to iomap
	440	* @name: Name used when requesting regions
	441	*
	442	* Request all PCI BARs and iomap regions specified by @mask.
	443	*/
fb7ebfe4	444	int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
916fbfb7 TH	445	const char *name)
	446	{
	447	int request_mask = ((1 << 6) - 1) & ~mask;
	448	int rc;
	449
	450	rc = pci_request_selected_regions(pdev, request_mask, name);
	451	if (rc)
	452	return rc;
	453
	454	rc = pcim_iomap_regions(pdev, mask, name);
	455	if (rc)
	456	pci_release_selected_regions(pdev, request_mask);
	457	return rc;
	458	}
	459	EXPORT_SYMBOL(pcim_iomap_regions_request_all);
	460
ec04b075 TH	461	/**
	462	* pcim_iounmap_regions - Unmap and release PCI BARs
	463	* @pdev: PCI device to map IO resources for
	464	* @mask: Mask of BARs to unmap and release
	465	*
4d45ada3	466	* Unmap and release regions specified by @mask.
ec04b075	467	*/
fb7ebfe4	468	void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
ec04b075 TH	469	{
	470	void __iomem * const *iomap;
	471	int i;
	472
	473	iomap = pcim_iomap_table(pdev);
	474	if (!iomap)
	475	return;
	476
1f35d04a	477	for (i = 0; i < PCIM_IOMAP_MAX; i++) {
ec04b075 TH	478	if (!(mask & (1 << i)))
	479	continue;
	480
	481	pcim_iounmap(pdev, iomap[i]);
	482	pci_release_region(pdev, i);
	483	}
	484	}
	485	EXPORT_SYMBOL(pcim_iounmap_regions);
571806a9	486	#endif /* CONFIG_PCI */