[thirdparty/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>
#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;

	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_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 WS	121	void __iomem *dest_ptr;
	122
	123	BUG_ON(!dev);
	124
	125	if (!res \|\| resource_type(res) != IORESOURCE_MEM) {
	126	dev_err(dev, "invalid resource\n");
b104d6a5	127	return IOMEM_ERR_PTR(-EINVAL);
72f8c0bf WS	128	}
	129
	130	size = resource_size(res);
72f8c0bf	131
8d84b18f	132	if (!devm_request_mem_region(dev, res->start, size, dev_name(dev))) {
72f8c0bf	133	dev_err(dev, "can't request region for resource %pR\n", res);
b104d6a5	134	return IOMEM_ERR_PTR(-EBUSY);
72f8c0bf WS	135	}
72f8c0bf WS	136
6e924822	137	dest_ptr = __devm_ioremap(dev, res->start, size, type);
72f8c0bf WS	138	if (!dest_ptr) {
	139	dev_err(dev, "ioremap failed for resource %pR\n", res);
	140	devm_release_mem_region(dev, res->start, size);
b104d6a5	141	dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
72f8c0bf WS	142	}
	143
	144	return dest_ptr;
	145	}
6e924822 BG	146
	147	/**
	148	* devm_ioremap_resource() - check, request region, and ioremap resource
	149	* @dev: generic device to handle the resource for
	150	* @res: resource to be handled
	151	*
	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.
	155	*
	156	* Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
	157	* on failure. Usage example:
	158	*
	159	* res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	160	* base = devm_ioremap_resource(&pdev->dev, res);
	161	* if (IS_ERR(base))
	162	* return PTR_ERR(base);
	163	*/
	164	void __iomem devm_ioremap_resource(struct device dev,
	165	const struct resource *res)
	166	{
	167	return __devm_ioremap_resource(dev, res, DEVM_IOREMAP);
	168	}
75096579 TR	169	EXPORT_SYMBOL(devm_ioremap_resource);
75096579 TR	170
b873af62 BG	171	/**
	172	* devm_ioremap_resource_wc() - write-combined variant of
	173	* devm_ioremap_resource()
	174	* @dev: generic device to handle the resource for
	175	* @res: resource to be handled
	176	*
	177	* Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
	178	* on failure. Usage example:
	179	*/
	180	void __iomem devm_ioremap_resource_wc(struct device dev,
	181	const struct resource *res)
	182	{
	183	return __devm_ioremap_resource(dev, res, DEVM_IOREMAP_WC);
	184	}
	185
d5e83827 BH	186	/*
	187	* devm_of_iomap - Requests a resource and maps the memory mapped IO
	188	* for a given device_node managed by a given device
	189	*
	190	* Checks that a resource is a valid memory region, requests the memory
	191	* region and ioremaps it. All operations are managed and will be undone
	192	* on driver detach of the device.
	193	*
	194	* This is to be used when a device requests/maps resources described
	195	* by other device tree nodes (children or otherwise).
	196	*
	197	* @dev: The device "managing" the resource
	198	* @node: The device-tree node where the resource resides
	199	* @index: index of the MMIO range in the "reg" property
	200	* @size: Returns the size of the resource (pass NULL if not needed)
	201	* Returns a pointer to the requested and mapped memory or an ERR_PTR() encoded
	202	* error code on failure. Usage example:
	203	*
	204	* base = devm_of_iomap(&pdev->dev, node, 0, NULL);
	205	* if (IS_ERR(base))
	206	* return PTR_ERR(base);
	207	*/
	208	void __iomem devm_of_iomap(struct device dev, struct device_node *node, int index,
	209	resource_size_t *size)
	210	{
	211	struct resource res;
	212
	213	if (of_address_to_resource(node, index, &res))
	214	return IOMEM_ERR_PTR(-EINVAL);
	215	if (size)
	216	*size = resource_size(&res);
	217	return devm_ioremap_resource(dev, &res);
	218	}
	219	EXPORT_SYMBOL(devm_of_iomap);
	220
ce816fa8	221	#ifdef CONFIG_HAS_IOPORT_MAP
5ea81769 AV	222	/*
	223	* Generic iomap devres
	224	*/
	225	static void devm_ioport_map_release(struct device dev, void res)
	226	{
	227	ioport_unmap((void __iomem *)res);
	228	}
	229
	230	static int devm_ioport_map_match(struct device dev, void res,
	231	void *match_data)
	232	{
	233	return (void *)res == match_data;
	234	}
	235
	236	/**
	237	* devm_ioport_map - Managed ioport_map()
	238	* @dev: Generic device to map ioport for
	239	* @port: Port to map
	240	* @nr: Number of ports to map
	241	*
	242	* Managed ioport_map(). Map is automatically unmapped on driver
	243	* detach.
	244	*/
5cbb00cc	245	void __iomem devm_ioport_map(struct device dev, unsigned long port,
5ea81769 AV	246	unsigned int nr)
	247	{
	248	void __iomem *ptr, addr;
	249
	250	ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
	251	if (!ptr)
	252	return NULL;
	253
	254	addr = ioport_map(port, nr);
	255	if (addr) {
	256	*ptr = addr;
	257	devres_add(dev, ptr);
	258	} else
	259	devres_free(ptr);
	260
	261	return addr;
	262	}
	263	EXPORT_SYMBOL(devm_ioport_map);
	264
	265	/**
	266	* devm_ioport_unmap - Managed ioport_unmap()
	267	* @dev: Generic device to unmap for
	268	* @addr: Address to unmap
	269	*
	270	* Managed ioport_unmap(). @addr must have been mapped using
	271	* devm_ioport_map().
	272	*/
	273	void devm_ioport_unmap(struct device dev, void __iomem addr)
	274	{
	275	ioport_unmap(addr);
	276	WARN_ON(devres_destroy(dev, devm_ioport_map_release,
b104d6a5	277	devm_ioport_map_match, (__force void *)addr));
5ea81769 AV	278	}
5ea81769 AV	279	EXPORT_SYMBOL(devm_ioport_unmap);
ce816fa8	280	#endif /* CONFIG_HAS_IOPORT_MAP */
5ea81769 AV	281
	282	#ifdef CONFIG_PCI
	283	/*
	284	* PCI iomap devres
	285	*/
c9c13ba4	286	#define PCIM_IOMAP_MAX PCI_STD_NUM_BARS
5ea81769 AV	287
	288	struct pcim_iomap_devres {
	289	void __iomem *table[PCIM_IOMAP_MAX];
	290	};
	291
	292	static void pcim_iomap_release(struct device gendev, void res)
	293	{
20af74ef	294	struct pci_dev *dev = to_pci_dev(gendev);
5ea81769 AV	295	struct pcim_iomap_devres *this = res;
	296	int i;
	297
	298	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	299	if (this->table[i])
	300	pci_iounmap(dev, this->table[i]);
	301	}
	302
	303	/**
	304	* pcim_iomap_table - access iomap allocation table
	305	* @pdev: PCI device to access iomap table for
	306	*
	307	* Access iomap allocation table for @dev. If iomap table doesn't
	308	* exist and @pdev is managed, it will be allocated. All iomaps
	309	* recorded in the iomap table are automatically unmapped on driver
	310	* detach.
	311	*
	312	* This function might sleep when the table is first allocated but can
	313	* be safely called without context and guaranteed to succed once
	314	* allocated.
	315	*/
5cbb00cc	316	void __iomem * const pcim_iomap_table(struct pci_dev pdev)
5ea81769 AV	317	{
	318	struct pcim_iomap_devres dr, new_dr;
	319
	320	dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
	321	if (dr)
	322	return dr->table;
	323
	324	new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
	325	if (!new_dr)
	326	return NULL;
	327	dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
	328	return dr->table;
	329	}
	330	EXPORT_SYMBOL(pcim_iomap_table);
	331
	332	/**
	333	* pcim_iomap - Managed pcim_iomap()
	334	* @pdev: PCI device to iomap for
	335	* @bar: BAR to iomap
	336	* @maxlen: Maximum length of iomap
	337	*
	338	* Managed pci_iomap(). Map is automatically unmapped on driver
	339	* detach.
	340	*/
5cbb00cc	341	void __iomem pcim_iomap(struct pci_dev pdev, int bar, unsigned long maxlen)
5ea81769 AV	342	{
	343	void __iomem **tbl;
	344
	345	BUG_ON(bar >= PCIM_IOMAP_MAX);
	346
	347	tbl = (void __iomem **)pcim_iomap_table(pdev);
	348	if (!tbl \|\| tbl[bar]) /* duplicate mappings not allowed */
	349	return NULL;
	350
	351	tbl[bar] = pci_iomap(pdev, bar, maxlen);
	352	return tbl[bar];
	353	}
	354	EXPORT_SYMBOL(pcim_iomap);
	355
	356	/**
	357	* pcim_iounmap - Managed pci_iounmap()
	358	* @pdev: PCI device to iounmap for
	359	* @addr: Address to unmap
	360	*
	361	* Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
	362	*/
	363	void pcim_iounmap(struct pci_dev pdev, void __iomem addr)
	364	{
	365	void __iomem **tbl;
	366	int i;
	367
	368	pci_iounmap(pdev, addr);
	369
	370	tbl = (void __iomem **)pcim_iomap_table(pdev);
	371	BUG_ON(!tbl);
	372
	373	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	374	if (tbl[i] == addr) {
	375	tbl[i] = NULL;
	376	return;
	377	}
	378	WARN_ON(1);
	379	}
	380	EXPORT_SYMBOL(pcim_iounmap);
	381
	382	/**
	383	* pcim_iomap_regions - Request and iomap PCI BARs
	384	* @pdev: PCI device to map IO resources for
	385	* @mask: Mask of BARs to request and iomap
	386	* @name: Name used when requesting regions
	387	*
	388	* Request and iomap regions specified by @mask.
	389	*/
fb7ebfe4	390	int pcim_iomap_regions(struct pci_dev pdev, int mask, const char name)
5ea81769 AV	391	{
	392	void __iomem * const *iomap;
	393	int i, rc;
	394
	395	iomap = pcim_iomap_table(pdev);
	396	if (!iomap)
	397	return -ENOMEM;
	398
	399	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
	400	unsigned long len;
	401
	402	if (!(mask & (1 << i)))
	403	continue;
	404
	405	rc = -EINVAL;
	406	len = pci_resource_len(pdev, i);
	407	if (!len)
	408	goto err_inval;
	409
	410	rc = pci_request_region(pdev, i, name);
	411	if (rc)
fb4d64e7	412	goto err_inval;
5ea81769 AV	413
	414	rc = -ENOMEM;
	415	if (!pcim_iomap(pdev, i, 0))
fb4d64e7	416	goto err_region;
5ea81769 AV	417	}
	418
	419	return 0;
	420
5ea81769 AV	421	err_region:
	422	pci_release_region(pdev, i);
	423	err_inval:
	424	while (--i >= 0) {
fb4d64e7 FD	425	if (!(mask & (1 << i)))
fb4d64e7 FD	426	continue;
5ea81769 AV	427	pcim_iounmap(pdev, iomap[i]);
	428	pci_release_region(pdev, i);
	429	}
	430
	431	return rc;
	432	}
	433	EXPORT_SYMBOL(pcim_iomap_regions);
ec04b075	434
916fbfb7 TH	435	/**
	436	* pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
	437	* @pdev: PCI device to map IO resources for
	438	* @mask: Mask of BARs to iomap
	439	* @name: Name used when requesting regions
	440	*
	441	* Request all PCI BARs and iomap regions specified by @mask.
	442	*/
fb7ebfe4	443	int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
916fbfb7 TH	444	const char *name)
	445	{
	446	int request_mask = ((1 << 6) - 1) & ~mask;
	447	int rc;
	448
	449	rc = pci_request_selected_regions(pdev, request_mask, name);
	450	if (rc)
	451	return rc;
	452
	453	rc = pcim_iomap_regions(pdev, mask, name);
	454	if (rc)
	455	pci_release_selected_regions(pdev, request_mask);
	456	return rc;
	457	}
	458	EXPORT_SYMBOL(pcim_iomap_regions_request_all);
	459
ec04b075 TH	460	/**
	461	* pcim_iounmap_regions - Unmap and release PCI BARs
	462	* @pdev: PCI device to map IO resources for
	463	* @mask: Mask of BARs to unmap and release
	464	*
4d45ada3	465	* Unmap and release regions specified by @mask.
ec04b075	466	*/
fb7ebfe4	467	void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
ec04b075 TH	468	{
	469	void __iomem * const *iomap;
	470	int i;
	471
	472	iomap = pcim_iomap_table(pdev);
	473	if (!iomap)
	474	return;
	475
1f35d04a	476	for (i = 0; i < PCIM_IOMAP_MAX; i++) {
ec04b075 TH	477	if (!(mask & (1 << i)))
	478	continue;
	479
	480	pcim_iounmap(pdev, iomap[i]);
	481	pci_release_region(pdev, i);
	482	}
	483	}
	484	EXPORT_SYMBOL(pcim_iounmap_regions);
571806a9	485	#endif /* CONFIG_PCI */