[thirdparty/linux.git] / lib / devres.c

// SPDX-License-Identifier: GPL-2.0
#include <linux/device.h>
#include <linux/err.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,
	DEVM_IOREMAP_NP,
};

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_node(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL,
				dev_to_node(dev));
	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;
	case DEVM_IOREMAP_NP:
		addr = ioremap_np(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 %pR\n", res);
		return IOMEM_ERR_PTR(-EINVAL);
	}

	if (type == DEVM_IOREMAP && res->flags & IORESOURCE_MEM_NONPOSTED)
		type = DEVM_IOREMAP_NP;

	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) {
		dev_err(dev, "can't generate pretty name for resource %pR\n", res);
		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.
 *
 * 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);
 *
 * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
 * on failure.
 */
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
 *
 * Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
 * on failure.
 */
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)
 *
 * Usage example:
 *
 *	base = devm_of_iomap(&pdev->dev, node, 0, NULL);
 *	if (IS_ERR(base))
 *		return PTR_ERR(base);
 *
 * Please Note: This is not a one-to-one replacement for of_iomap() because the
 * of_iomap() function does not track whether the region is already mapped.  If
 * two drivers try to map the same memory, the of_iomap() function will succeed
 * but the devm_of_iomap() function will return -EBUSY.
 *
 * Return: a pointer to the requested and mapped memory or an ERR_PTR() encoded
 * error code on failure.
 */
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.
 *
 * Return: a pointer to the remapped memory or NULL on failure.
 */
void __iomem *devm_ioport_map(struct device *dev, unsigned long port,
			       unsigned int nr)
{
	void __iomem **ptr, *addr;

	ptr = devres_alloc_node(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL,
				dev_to_node(dev));
	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 */

static void devm_arch_phys_ac_add_release(struct device *dev, void *res)
{
	arch_phys_wc_del(*((int *)res));
}

/**
 * devm_arch_phys_wc_add - Managed arch_phys_wc_add()
 * @dev: Managed device
 * @base: Memory base address
 * @size: Size of memory range
 *
 * Adds a WC MTRR using arch_phys_wc_add() and sets up a release callback.
 * See arch_phys_wc_add() for more information.
 */
int devm_arch_phys_wc_add(struct device *dev, unsigned long base, unsigned long size)
{
	int *mtrr;
	int ret;

	mtrr = devres_alloc_node(devm_arch_phys_ac_add_release, sizeof(*mtrr), GFP_KERNEL,
				 dev_to_node(dev));
	if (!mtrr)
		return -ENOMEM;

	ret = arch_phys_wc_add(base, size);
	if (ret < 0) {
		devres_free(mtrr);
		return ret;
	}

	*mtrr = ret;
	devres_add(dev, mtrr);

	return ret;
}
EXPORT_SYMBOL(devm_arch_phys_wc_add);

struct arch_io_reserve_memtype_wc_devres {
	resource_size_t start;
	resource_size_t size;
};

static void devm_arch_io_free_memtype_wc_release(struct device *dev, void *res)
{
	const struct arch_io_reserve_memtype_wc_devres *this = res;

	arch_io_free_memtype_wc(this->start, this->size);
}

/**
 * devm_arch_io_reserve_memtype_wc - Managed arch_io_reserve_memtype_wc()
 * @dev: Managed device
 * @start: Memory base address
 * @size: Size of memory range
 *
 * Reserves a memory range with WC caching using arch_io_reserve_memtype_wc()
 * and sets up a release callback See arch_io_reserve_memtype_wc() for more
 * information.
 */
int devm_arch_io_reserve_memtype_wc(struct device *dev, resource_size_t start,
				    resource_size_t size)
{
	struct arch_io_reserve_memtype_wc_devres *dr;
	int ret;

	dr = devres_alloc_node(devm_arch_io_free_memtype_wc_release, sizeof(*dr), GFP_KERNEL,
			       dev_to_node(dev));
	if (!dr)
		return -ENOMEM;

	ret = arch_io_reserve_memtype_wc(start, size);
	if (ret < 0) {
		devres_free(dr);
		return ret;
	}

	dr->start = start;
	dr->size = size;
	devres_add(dev, dr);

	return ret;
}
EXPORT_SYMBOL(devm_arch_io_reserve_memtype_wc);
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
acc2364f	2	#include <linux/device.h>
f4a18312	3	#include <linux/err.h>
5ea81769	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	12	DEVM_IOREMAP_WC,
7c566bb5	13	DEVM_IOREMAP_NP,
1b723413 YX	14	};
1b723413 YX	15
b41e5fff	16	void devm_ioremap_release(struct device dev, void res)
5ea81769 AV	17	{
	18	iounmap((void __iomem *)res);
	19	}
	20
	21	static int devm_ioremap_match(struct device dev, void res, void *match_data)
	22	{
	23	return (void *)res == match_data;
	24	}
	25
1b723413 YX	26	static void __iomem __devm_ioremap(struct device dev, resource_size_t offset,
	27	resource_size_t size,
	28	enum devm_ioremap_type type)
5ea81769	29	{
1b723413	30	void __iomem *ptr, addr = NULL;
5ea81769	31
55656016 MPT	32	ptr = devres_alloc_node(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL,
55656016 MPT	33	dev_to_node(dev));
5ea81769 AV	34	if (!ptr)
	35	return NULL;
	36
1b723413 YX	37	switch (type) {
	38	case DEVM_IOREMAP:
	39	addr = ioremap(offset, size);
	40	break;
e537654b TZ	41	case DEVM_IOREMAP_UC:
	42	addr = ioremap_uc(offset, size);
	43	break;
1b723413 YX	44	case DEVM_IOREMAP_WC:
	45	addr = ioremap_wc(offset, size);
	46	break;
7c566bb5 HM	47	case DEVM_IOREMAP_NP:
	48	addr = ioremap_np(offset, size);
	49	break;
1b723413 YX	50	}
1b723413 YX	51
5ea81769 AV	52	if (addr) {
	53	*ptr = addr;
	54	devres_add(dev, ptr);
	55	} else
	56	devres_free(ptr);
	57
	58	return addr;
	59	}
1b723413 YX	60
	61	/**
	62	* devm_ioremap - Managed ioremap()
	63	* @dev: Generic device to remap IO address for
	64	* @offset: Resource address to map
	65	* @size: Size of map
	66	*
	67	* Managed ioremap(). Map is automatically unmapped on driver detach.
	68	*/
	69	void __iomem devm_ioremap(struct device dev, resource_size_t offset,
	70	resource_size_t size)
	71	{
	72	return __devm_ioremap(dev, offset, size, DEVM_IOREMAP);
	73	}
5ea81769 AV	74	EXPORT_SYMBOL(devm_ioremap);
5ea81769 AV	75
e537654b TZ	76	/**
	77	* devm_ioremap_uc - Managed ioremap_uc()
	78	* @dev: Generic device to remap IO address for
	79	* @offset: Resource address to map
	80	* @size: Size of map
	81	*
	82	* Managed ioremap_uc(). Map is automatically unmapped on driver detach.
	83	*/
	84	void __iomem devm_ioremap_uc(struct device dev, resource_size_t offset,
	85	resource_size_t size)
	86	{
	87	return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_UC);
	88	}
	89	EXPORT_SYMBOL_GPL(devm_ioremap_uc);
	90
34644524 AK	91	/**
	92	* devm_ioremap_wc - Managed ioremap_wc()
	93	* @dev: Generic device to remap IO address for
6524754e	94	* @offset: Resource address to map
34644524 AK	95	* @size: Size of map
	96	*
	97	* Managed ioremap_wc(). Map is automatically unmapped on driver detach.
	98	*/
	99	void __iomem devm_ioremap_wc(struct device dev, resource_size_t offset,
	100	resource_size_t size)
	101	{
1b723413	102	return __devm_ioremap(dev, offset, size, DEVM_IOREMAP_WC);
34644524 AK	103	}
	104	EXPORT_SYMBOL(devm_ioremap_wc);
	105
5ea81769 AV	106	/**
	107	* devm_iounmap - Managed iounmap()
	108	* @dev: Generic device to unmap for
	109	* @addr: Address to unmap
	110	*
	111	* Managed iounmap(). @addr must have been mapped using devm_ioremap*().
	112	*/
	113	void devm_iounmap(struct device dev, void __iomem addr)
	114	{
5ea81769	115	WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
b104d6a5	116	(__force void *)addr));
ae891a1b	117	iounmap(addr);
5ea81769 AV	118	}
	119	EXPORT_SYMBOL(devm_iounmap);
	120
6e924822 BG	121	static void __iomem *
	122	__devm_ioremap_resource(struct device dev, const struct resource res,
	123	enum devm_ioremap_type type)
72f8c0bf WS	124	{
72f8c0bf WS	125	resource_size_t size;
72f8c0bf	126	void __iomem *dest_ptr;
35bd8c07	127	char *pretty_name;
72f8c0bf WS	128
	129	BUG_ON(!dev);
	130
	131	if (!res \|\| resource_type(res) != IORESOURCE_MEM) {
875e0c31	132	dev_err(dev, "invalid resource %pR\n", res);
b104d6a5	133	return IOMEM_ERR_PTR(-EINVAL);
72f8c0bf WS	134	}
72f8c0bf WS	135
7c566bb5 HM	136	if (type == DEVM_IOREMAP && res->flags & IORESOURCE_MEM_NONPOSTED)
	137	type = DEVM_IOREMAP_NP;
	138
72f8c0bf	139	size = resource_size(res);
72f8c0bf	140
35bd8c07 VO	141	if (res->name)
	142	pretty_name = devm_kasprintf(dev, GFP_KERNEL, "%s %s",
	143	dev_name(dev), res->name);
	144	else
	145	pretty_name = devm_kstrdup(dev, dev_name(dev), GFP_KERNEL);
5c3e241f ZL	146	if (!pretty_name) {
5c3e241f ZL	147	dev_err(dev, "can't generate pretty name for resource %pR\n", res);
35bd8c07	148	return IOMEM_ERR_PTR(-ENOMEM);
5c3e241f	149	}
35bd8c07 VO	150
35bd8c07 VO	151	if (!devm_request_mem_region(dev, res->start, size, pretty_name)) {
72f8c0bf	152	dev_err(dev, "can't request region for resource %pR\n", res);
b104d6a5	153	return IOMEM_ERR_PTR(-EBUSY);
72f8c0bf WS	154	}
72f8c0bf WS	155
6e924822	156	dest_ptr = __devm_ioremap(dev, res->start, size, type);
72f8c0bf WS	157	if (!dest_ptr) {
	158	dev_err(dev, "ioremap failed for resource %pR\n", res);
	159	devm_release_mem_region(dev, res->start, size);
b104d6a5	160	dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
72f8c0bf WS	161	}
	162
	163	return dest_ptr;
	164	}
6e924822 BG	165
	166	/**
	167	* devm_ioremap_resource() - check, request region, and ioremap resource
	168	* @dev: generic device to handle the resource for
	169	* @res: resource to be handled
	170	*
	171	* Checks that a resource is a valid memory region, requests the memory
	172	* region and ioremaps it. All operations are managed and will be undone
	173	* on driver detach.
	174	*
0c7a6b91	175	* Usage example:
6e924822 BG	176	*
	177	* res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	178	* base = devm_ioremap_resource(&pdev->dev, res);
	179	* if (IS_ERR(base))
	180	* return PTR_ERR(base);
0c7a6b91 SB	181	*
	182	* Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
	183	* on failure.
6e924822 BG	184	*/
	185	void __iomem devm_ioremap_resource(struct device dev,
	186	const struct resource *res)
	187	{
	188	return __devm_ioremap_resource(dev, res, DEVM_IOREMAP);
	189	}
75096579 TR	190	EXPORT_SYMBOL(devm_ioremap_resource);
75096579 TR	191
b873af62 BG	192	/**
	193	* devm_ioremap_resource_wc() - write-combined variant of
	194	* devm_ioremap_resource()
	195	* @dev: generic device to handle the resource for
	196	* @res: resource to be handled
	197	*
0c7a6b91 SB	198	* Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
0c7a6b91 SB	199	* on failure.
b873af62 BG	200	*/
	201	void __iomem devm_ioremap_resource_wc(struct device dev,
	202	const struct resource *res)
	203	{
	204	return __devm_ioremap_resource(dev, res, DEVM_IOREMAP_WC);
	205	}
	206
d5e83827 BH	207	/*
	208	* devm_of_iomap - Requests a resource and maps the memory mapped IO
	209	* for a given device_node managed by a given device
	210	*
	211	* Checks that a resource is a valid memory region, requests the memory
	212	* region and ioremaps it. All operations are managed and will be undone
	213	* on driver detach of the device.
	214	*
	215	* This is to be used when a device requests/maps resources described
	216	* by other device tree nodes (children or otherwise).
	217	*
	218	* @dev: The device "managing" the resource
	219	* @node: The device-tree node where the resource resides
	220	* @index: index of the MMIO range in the "reg" property
	221	* @size: Returns the size of the resource (pass NULL if not needed)
0c7a6b91 SB	222	*
0c7a6b91 SB	223	* Usage example:
d5e83827 BH	224	*
	225	* base = devm_of_iomap(&pdev->dev, node, 0, NULL);
	226	* if (IS_ERR(base))
	227	* return PTR_ERR(base);
7ae731a8 DC	228	*
	229	* Please Note: This is not a one-to-one replacement for of_iomap() because the
	230	* of_iomap() function does not track whether the region is already mapped. If
	231	* two drivers try to map the same memory, the of_iomap() function will succeed
28d9fdf0	232	* but the devm_of_iomap() function will return -EBUSY.
7ae731a8	233	*
0c7a6b91 SB	234	* Return: a pointer to the requested and mapped memory or an ERR_PTR() encoded
0c7a6b91 SB	235	* error code on failure.
d5e83827 BH	236	*/
	237	void __iomem devm_of_iomap(struct device dev, struct device_node *node, int index,
	238	resource_size_t *size)
	239	{
	240	struct resource res;
	241
	242	if (of_address_to_resource(node, index, &res))
	243	return IOMEM_ERR_PTR(-EINVAL);
	244	if (size)
	245	*size = resource_size(&res);
	246	return devm_ioremap_resource(dev, &res);
	247	}
	248	EXPORT_SYMBOL(devm_of_iomap);
	249
ce816fa8	250	#ifdef CONFIG_HAS_IOPORT_MAP
5ea81769 AV	251	/*
	252	* Generic iomap devres
	253	*/
	254	static void devm_ioport_map_release(struct device dev, void res)
	255	{
	256	ioport_unmap((void __iomem *)res);
	257	}
	258
	259	static int devm_ioport_map_match(struct device dev, void res,
	260	void *match_data)
	261	{
	262	return (void *)res == match_data;
	263	}
	264
	265	/**
	266	* devm_ioport_map - Managed ioport_map()
	267	* @dev: Generic device to map ioport for
	268	* @port: Port to map
	269	* @nr: Number of ports to map
	270	*
	271	* Managed ioport_map(). Map is automatically unmapped on driver
	272	* detach.
0c7a6b91 SB	273	*
0c7a6b91 SB	274	* Return: a pointer to the remapped memory or NULL on failure.
5ea81769	275	*/
5cbb00cc	276	void __iomem devm_ioport_map(struct device dev, unsigned long port,
5ea81769 AV	277	unsigned int nr)
	278	{
	279	void __iomem *ptr, addr;
	280
55656016 MPT	281	ptr = devres_alloc_node(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL,
55656016 MPT	282	dev_to_node(dev));
5ea81769 AV	283	if (!ptr)
	284	return NULL;
	285
	286	addr = ioport_map(port, nr);
	287	if (addr) {
	288	*ptr = addr;
	289	devres_add(dev, ptr);
	290	} else
	291	devres_free(ptr);
	292
	293	return addr;
	294	}
	295	EXPORT_SYMBOL(devm_ioport_map);
	296
	297	/**
	298	* devm_ioport_unmap - Managed ioport_unmap()
	299	* @dev: Generic device to unmap for
	300	* @addr: Address to unmap
	301	*
	302	* Managed ioport_unmap(). @addr must have been mapped using
	303	* devm_ioport_map().
	304	*/
	305	void devm_ioport_unmap(struct device dev, void __iomem addr)
	306	{
	307	ioport_unmap(addr);
	308	WARN_ON(devres_destroy(dev, devm_ioport_map_release,
b104d6a5	309	devm_ioport_map_match, (__force void *)addr));
5ea81769 AV	310	}
5ea81769 AV	311	EXPORT_SYMBOL(devm_ioport_unmap);
ce816fa8	312	#endif /* CONFIG_HAS_IOPORT_MAP */
5ea81769	313
3229b906 TZ	314	static void devm_arch_phys_ac_add_release(struct device dev, void res)
	315	{
	316	arch_phys_wc_del(((int )res));
	317	}
	318
	319	/**
	320	* devm_arch_phys_wc_add - Managed arch_phys_wc_add()
	321	* @dev: Managed device
	322	* @base: Memory base address
	323	* @size: Size of memory range
	324	*
	325	* Adds a WC MTRR using arch_phys_wc_add() and sets up a release callback.
	326	* See arch_phys_wc_add() for more information.
	327	*/
	328	int devm_arch_phys_wc_add(struct device *dev, unsigned long base, unsigned long size)
	329	{
	330	int *mtrr;
	331	int ret;
	332
55656016 MPT	333	mtrr = devres_alloc_node(devm_arch_phys_ac_add_release, sizeof(*mtrr), GFP_KERNEL,
55656016 MPT	334	dev_to_node(dev));
3229b906 TZ	335	if (!mtrr)
	336	return -ENOMEM;
	337
	338	ret = arch_phys_wc_add(base, size);
	339	if (ret < 0) {
	340	devres_free(mtrr);
	341	return ret;
	342	}
	343
	344	*mtrr = ret;
	345	devres_add(dev, mtrr);
	346
	347	return ret;
	348	}
	349	EXPORT_SYMBOL(devm_arch_phys_wc_add);
c8223107 TZ	350
	351	struct arch_io_reserve_memtype_wc_devres {
	352	resource_size_t start;
	353	resource_size_t size;
	354	};
	355
	356	static void devm_arch_io_free_memtype_wc_release(struct device dev, void res)
	357	{
	358	const struct arch_io_reserve_memtype_wc_devres *this = res;
	359
	360	arch_io_free_memtype_wc(this->start, this->size);
	361	}
	362
	363	/**
	364	* devm_arch_io_reserve_memtype_wc - Managed arch_io_reserve_memtype_wc()
	365	* @dev: Managed device
	366	* @start: Memory base address
	367	* @size: Size of memory range
	368	*
	369	* Reserves a memory range with WC caching using arch_io_reserve_memtype_wc()
	370	* and sets up a release callback See arch_io_reserve_memtype_wc() for more
	371	* information.
	372	*/
	373	int devm_arch_io_reserve_memtype_wc(struct device *dev, resource_size_t start,
	374	resource_size_t size)
	375	{
	376	struct arch_io_reserve_memtype_wc_devres *dr;
	377	int ret;
	378
55656016 MPT	379	dr = devres_alloc_node(devm_arch_io_free_memtype_wc_release, sizeof(*dr), GFP_KERNEL,
55656016 MPT	380	dev_to_node(dev));
c8223107 TZ	381	if (!dr)
	382	return -ENOMEM;
	383
	384	ret = arch_io_reserve_memtype_wc(start, size);
	385	if (ret < 0) {
	386	devres_free(dr);
	387	return ret;
	388	}
	389
	390	dr->start = start;
	391	dr->size = size;
	392	devres_add(dev, dr);
	393
	394	return ret;
	395	}
	396	EXPORT_SYMBOL(devm_arch_io_reserve_memtype_wc);