[mirror_ubuntu-artful-kernel.git] / lib / devres.c

#include <linux/err.h>
#include <linux/pci.h>
#include <linux/io.h>
#include <linux/gfp.h>
#include <linux/export.h>

void devm_ioremap_release(struct device *dev, void *res)
{
	iounmap(*(void __iomem **)res);
}

static int devm_ioremap_match(struct device *dev, void *res, void *match_data)
{
	return *(void **)res == match_data;
}

/**
 * devm_ioremap - Managed ioremap()
 * @dev: Generic device to remap IO address for
 * @offset: BUS offset 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,
			   unsigned long size)
{
	void __iomem **ptr, *addr;

	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
	if (!ptr)
		return NULL;

	addr = ioremap(offset, size);
	if (addr) {
		*ptr = addr;
		devres_add(dev, ptr);
	} else
		devres_free(ptr);

	return addr;
}
EXPORT_SYMBOL(devm_ioremap);

/**
 * devm_ioremap_nocache - Managed ioremap_nocache()
 * @dev: Generic device to remap IO address for
 * @offset: BUS offset 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,
				   unsigned long size)
{
	void __iomem **ptr, *addr;

	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
	if (!ptr)
		return NULL;

	addr = ioremap_nocache(offset, size);
	if (addr) {
		*ptr = addr;
		devres_add(dev, ptr);
	} else
		devres_free(ptr);

	return addr;
}
EXPORT_SYMBOL(devm_ioremap_nocache);

/**
 * devm_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);

#define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err)

/**
 * 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 either as cacheable or as non-cacheable memory depending on
 * the resource's flags. All operations are managed and will be undone on
 * driver detach.
 *
 * Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
 * on failure. Usage example:
 *
 *	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 *	base = devm_ioremap_resource(&pdev->dev, res);
 *	if (IS_ERR(base))
 *		return PTR_ERR(base);
 */
void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res)
{
	resource_size_t size;
	const char *name;
	void __iomem *dest_ptr;

	BUG_ON(!dev);

	if (!res || resource_type(res) != IORESOURCE_MEM) {
		dev_err(dev, "invalid resource\n");
		return IOMEM_ERR_PTR(-EINVAL);
	}

	size = resource_size(res);
	name = res->name ?: dev_name(dev);

	if (!devm_request_mem_region(dev, res->start, size, name)) {
		dev_err(dev, "can't request region for resource %pR\n", res);
		return IOMEM_ERR_PTR(-EBUSY);
	}

	if (res->flags & IORESOURCE_CACHEABLE)
		dest_ptr = devm_ioremap(dev, res->start, size);
	else
		dest_ptr = devm_ioremap_nocache(dev, res->start, size);

	if (!dest_ptr) {
		dev_err(dev, "ioremap failed for resource %pR\n", res);
		devm_release_mem_region(dev, res->start, size);
		dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
	}

	return dest_ptr;
}
EXPORT_SYMBOL(devm_ioremap_resource);

/**
 * devm_request_and_ioremap() - Check, request region, and ioremap resource
 * @dev: Generic device to handle the resource for
 * @res: resource to be handled
 *
 * Takes all necessary steps to ioremap a mem resource. Uses managed device, so
 * everything is undone on driver detach. Checks arguments, so you can feed
 * it the result from e.g. platform_get_resource() directly. Returns the
 * remapped pointer or NULL on error. Usage example:
 *
 *	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 *	base = devm_request_and_ioremap(&pdev->dev, res);
 *	if (!base)
 *		return -EADDRNOTAVAIL;
 */
void __iomem *devm_request_and_ioremap(struct device *device,
				       struct resource *res)
{
	void __iomem *dest_ptr;

	dest_ptr = devm_ioremap_resource(device, res);
	if (IS_ERR(dest_ptr))
		return NULL;

	return dest_ptr;
}
EXPORT_SYMBOL(devm_request_and_ioremap);

#ifdef CONFIG_HAS_IOPORT
/*
 * 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 */

#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 = container_of(gendev, struct pci_dev, dev);
	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 < DEVICE_COUNT_RESOURCE; 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
f4a18312	1	#include <linux/err.h>
5ea81769 AV	2	#include <linux/pci.h>
5ea81769 AV	3	#include <linux/io.h>
5a0e3ad6	4	#include <linux/gfp.h>
8bc3bcc9	5	#include <linux/export.h>
5ea81769	6
b41e5fff	7	void devm_ioremap_release(struct device dev, void res)
5ea81769 AV	8	{
	9	iounmap((void __iomem *)res);
	10	}
	11
	12	static int devm_ioremap_match(struct device dev, void res, void *match_data)
	13	{
	14	return (void *)res == match_data;
	15	}
	16
	17	/**
	18	* devm_ioremap - Managed ioremap()
	19	* @dev: Generic device to remap IO address for
	20	* @offset: BUS offset to map
	21	* @size: Size of map
	22	*
	23	* Managed ioremap(). Map is automatically unmapped on driver detach.
	24	*/
4f452e8a	25	void __iomem devm_ioremap(struct device dev, resource_size_t offset,
5ea81769 AV	26	unsigned long size)
	27	{
	28	void __iomem *ptr, addr;
	29
	30	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
	31	if (!ptr)
	32	return NULL;
	33
	34	addr = ioremap(offset, size);
	35	if (addr) {
	36	*ptr = addr;
	37	devres_add(dev, ptr);
	38	} else
	39	devres_free(ptr);
	40
	41	return addr;
	42	}
	43	EXPORT_SYMBOL(devm_ioremap);
	44
	45	/**
	46	* devm_ioremap_nocache - Managed ioremap_nocache()
	47	* @dev: Generic device to remap IO address for
	48	* @offset: BUS offset to map
	49	* @size: Size of map
	50	*
	51	* Managed ioremap_nocache(). Map is automatically unmapped on driver
	52	* detach.
	53	*/
4f452e8a	54	void __iomem devm_ioremap_nocache(struct device dev, resource_size_t offset,
5ea81769 AV	55	unsigned long size)
	56	{
	57	void __iomem *ptr, addr;
	58
	59	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);
	60	if (!ptr)
	61	return NULL;
	62
	63	addr = ioremap_nocache(offset, size);
	64	if (addr) {
	65	*ptr = addr;
	66	devres_add(dev, ptr);
	67	} else
	68	devres_free(ptr);
	69
	70	return addr;
	71	}
	72	EXPORT_SYMBOL(devm_ioremap_nocache);
	73
	74	/**
	75	* devm_iounmap - Managed iounmap()
	76	* @dev: Generic device to unmap for
	77	* @addr: Address to unmap
	78	*
	79	* Managed iounmap(). @addr must have been mapped using devm_ioremap*().
	80	*/
	81	void devm_iounmap(struct device dev, void __iomem addr)
	82	{
5ea81769	83	WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,
b104d6a5	84	(__force void *)addr));
ae891a1b	85	iounmap(addr);
5ea81769 AV	86	}
	87	EXPORT_SYMBOL(devm_iounmap);
	88
b104d6a5 SR	89	#define IOMEM_ERR_PTR(err) (__force void __iomem *)ERR_PTR(err)
b104d6a5 SR	90
72f8c0bf	91	/**
75096579 TR	92	* devm_ioremap_resource() - check, request region, and ioremap resource
75096579 TR	93	* @dev: generic device to handle the resource for
72f8c0bf WS	94	* @res: resource to be handled
72f8c0bf WS	95	*
75096579 TR	96	* Checks that a resource is a valid memory region, requests the memory region
	97	* and ioremaps it either as cacheable or as non-cacheable memory depending on
	98	* the resource's flags. All operations are managed and will be undone on
	99	* driver detach.
	100	*
	101	* Returns a pointer to the remapped memory or an ERR_PTR() encoded error code
	102	* on failure. Usage example:
72f8c0bf WS	103	*
72f8c0bf WS	104	* res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
75096579 TR	105	* base = devm_ioremap_resource(&pdev->dev, res);
	106	* if (IS_ERR(base))
	107	* return PTR_ERR(base);
72f8c0bf	108	*/
75096579	109	void __iomem devm_ioremap_resource(struct device dev, struct resource *res)
72f8c0bf WS	110	{
	111	resource_size_t size;
	112	const char *name;
	113	void __iomem *dest_ptr;
	114
	115	BUG_ON(!dev);
	116
	117	if (!res \|\| resource_type(res) != IORESOURCE_MEM) {
	118	dev_err(dev, "invalid resource\n");
b104d6a5	119	return IOMEM_ERR_PTR(-EINVAL);
72f8c0bf WS	120	}
	121
	122	size = resource_size(res);
	123	name = res->name ?: dev_name(dev);
	124
	125	if (!devm_request_mem_region(dev, res->start, size, name)) {
	126	dev_err(dev, "can't request region for resource %pR\n", res);
b104d6a5	127	return IOMEM_ERR_PTR(-EBUSY);
72f8c0bf WS	128	}
	129
	130	if (res->flags & IORESOURCE_CACHEABLE)
	131	dest_ptr = devm_ioremap(dev, res->start, size);
	132	else
	133	dest_ptr = devm_ioremap_nocache(dev, res->start, size);
	134
	135	if (!dest_ptr) {
	136	dev_err(dev, "ioremap failed for resource %pR\n", res);
	137	devm_release_mem_region(dev, res->start, size);
b104d6a5	138	dest_ptr = IOMEM_ERR_PTR(-ENOMEM);
72f8c0bf WS	139	}
	140
	141	return dest_ptr;
	142	}
75096579 TR	143	EXPORT_SYMBOL(devm_ioremap_resource);
	144
	145	/**
	146	* devm_request_and_ioremap() - Check, request region, and ioremap resource
	147	* @dev: Generic device to handle the resource for
	148	* @res: resource to be handled
	149	*
	150	* Takes all necessary steps to ioremap a mem resource. Uses managed device, so
	151	* everything is undone on driver detach. Checks arguments, so you can feed
	152	* it the result from e.g. platform_get_resource() directly. Returns the
	153	* remapped pointer or NULL on error. Usage example:
	154	*
	155	* res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	156	* base = devm_request_and_ioremap(&pdev->dev, res);
	157	* if (!base)
	158	* return -EADDRNOTAVAIL;
	159	*/
	160	void __iomem devm_request_and_ioremap(struct device device,
	161	struct resource *res)
	162	{
	163	void __iomem *dest_ptr;
	164
	165	dest_ptr = devm_ioremap_resource(device, res);
	166	if (IS_ERR(dest_ptr))
	167	return NULL;
	168
	169	return dest_ptr;
	170	}
72f8c0bf WS	171	EXPORT_SYMBOL(devm_request_and_ioremap);
72f8c0bf WS	172
5ea81769 AV	173	#ifdef CONFIG_HAS_IOPORT
	174	/*
	175	* Generic iomap devres
	176	*/
	177	static void devm_ioport_map_release(struct device dev, void res)
	178	{
	179	ioport_unmap((void __iomem *)res);
	180	}
	181
	182	static int devm_ioport_map_match(struct device dev, void res,
	183	void *match_data)
	184	{
	185	return (void *)res == match_data;
	186	}
	187
	188	/**
	189	* devm_ioport_map - Managed ioport_map()
	190	* @dev: Generic device to map ioport for
	191	* @port: Port to map
	192	* @nr: Number of ports to map
	193	*
	194	* Managed ioport_map(). Map is automatically unmapped on driver
	195	* detach.
	196	*/
	197	void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
	198	unsigned int nr)
	199	{
	200	void __iomem *ptr, addr;
	201
	202	ptr = devres_alloc(devm_ioport_map_release, sizeof(*ptr), GFP_KERNEL);
	203	if (!ptr)
	204	return NULL;
	205
	206	addr = ioport_map(port, nr);
	207	if (addr) {
	208	*ptr = addr;
	209	devres_add(dev, ptr);
	210	} else
	211	devres_free(ptr);
	212
	213	return addr;
	214	}
	215	EXPORT_SYMBOL(devm_ioport_map);
	216
	217	/**
	218	* devm_ioport_unmap - Managed ioport_unmap()
	219	* @dev: Generic device to unmap for
	220	* @addr: Address to unmap
	221	*
	222	* Managed ioport_unmap(). @addr must have been mapped using
	223	* devm_ioport_map().
	224	*/
	225	void devm_ioport_unmap(struct device dev, void __iomem addr)
	226	{
	227	ioport_unmap(addr);
	228	WARN_ON(devres_destroy(dev, devm_ioport_map_release,
b104d6a5	229	devm_ioport_map_match, (__force void *)addr));
5ea81769 AV	230	}
5ea81769 AV	231	EXPORT_SYMBOL(devm_ioport_unmap);
9ed8a30f	232	#endif /* CONFIG_HAS_IOPORT */
5ea81769 AV	233
	234	#ifdef CONFIG_PCI
	235	/*
	236	* PCI iomap devres
	237	*/
	238	#define PCIM_IOMAP_MAX PCI_ROM_RESOURCE
	239
	240	struct pcim_iomap_devres {
	241	void __iomem *table[PCIM_IOMAP_MAX];
	242	};
	243
	244	static void pcim_iomap_release(struct device gendev, void res)
	245	{
	246	struct pci_dev *dev = container_of(gendev, struct pci_dev, dev);
	247	struct pcim_iomap_devres *this = res;
	248	int i;
	249
	250	for (i = 0; i < PCIM_IOMAP_MAX; i++)
	251	if (this->table[i])
	252	pci_iounmap(dev, this->table[i]);
	253	}
	254
	255	/**
	256	* pcim_iomap_table - access iomap allocation table
	257	* @pdev: PCI device to access iomap table for
	258	*
	259	* Access iomap allocation table for @dev. If iomap table doesn't
	260	* exist and @pdev is managed, it will be allocated. All iomaps
	261	* recorded in the iomap table are automatically unmapped on driver
	262	* detach.
	263	*
	264	* This function might sleep when the table is first allocated but can
	265	* be safely called without context and guaranteed to succed once
	266	* allocated.
	267	*/
	268	void __iomem * const * pcim_iomap_table(struct pci_dev *pdev)
	269	{
	270	struct pcim_iomap_devres dr, new_dr;
	271
	272	dr = devres_find(&pdev->dev, pcim_iomap_release, NULL, NULL);
	273	if (dr)
	274	return dr->table;
	275
	276	new_dr = devres_alloc(pcim_iomap_release, sizeof(*new_dr), GFP_KERNEL);
	277	if (!new_dr)
	278	return NULL;
	279	dr = devres_get(&pdev->dev, new_dr, NULL, NULL);
	280	return dr->table;
	281	}
	282	EXPORT_SYMBOL(pcim_iomap_table);
	283
	284	/**
	285	* pcim_iomap - Managed pcim_iomap()
	286	* @pdev: PCI device to iomap for
	287	* @bar: BAR to iomap
	288	* @maxlen: Maximum length of iomap
	289	*
	290	* Managed pci_iomap(). Map is automatically unmapped on driver
	291	* detach.
	292	*/
	293	void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen)
	294	{
	295	void __iomem **tbl;
	296
297	BUG_ON(bar >= PCIM_IOMAP_MAX);
298
299	tbl = (void __iomem **)pcim_iomap_table(pdev);
300	if (!tbl \|\| tbl[bar]) /* duplicate mappings not allowed */
301	return NULL;
302
303	tbl[bar] = pci_iomap(pdev, bar, maxlen);
304	return tbl[bar];
305	}
306	EXPORT_SYMBOL(pcim_iomap);
307
308	/**
309	* pcim_iounmap - Managed pci_iounmap()
310	* @pdev: PCI device to iounmap for
311	* @addr: Address to unmap
312	*
313	* Managed pci_iounmap(). @addr must have been mapped using pcim_iomap().
314	*/
315	void pcim_iounmap(struct pci_dev pdev, void __iomem addr)
316	{
317	void __iomem **tbl;
318	int i;
319
320	pci_iounmap(pdev, addr);
321
322	tbl = (void __iomem **)pcim_iomap_table(pdev);
323	BUG_ON(!tbl);
324
325	for (i = 0; i < PCIM_IOMAP_MAX; i++)
326	if (tbl[i] == addr) {
327	tbl[i] = NULL;
328	return;
329	}
330	WARN_ON(1);
331	}
332	EXPORT_SYMBOL(pcim_iounmap);
333
334	/**
335	* pcim_iomap_regions - Request and iomap PCI BARs
336	* @pdev: PCI device to map IO resources for
337	* @mask: Mask of BARs to request and iomap
338	* @name: Name used when requesting regions
339	*
340	* Request and iomap regions specified by @mask.
341	*/
fb7ebfe4	342	int pcim_iomap_regions(struct pci_dev pdev, int mask, const char name)
5ea81769 AV	343	{
	344	void __iomem * const *iomap;
	345	int i, rc;
	346
	347	iomap = pcim_iomap_table(pdev);
	348	if (!iomap)
	349	return -ENOMEM;
	350
	351	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
	352	unsigned long len;
	353
	354	if (!(mask & (1 << i)))
	355	continue;
	356
	357	rc = -EINVAL;
	358	len = pci_resource_len(pdev, i);
	359	if (!len)
	360	goto err_inval;
	361
	362	rc = pci_request_region(pdev, i, name);
	363	if (rc)
fb4d64e7	364	goto err_inval;
5ea81769 AV	365
	366	rc = -ENOMEM;
	367	if (!pcim_iomap(pdev, i, 0))
fb4d64e7	368	goto err_region;
5ea81769 AV	369	}
	370
	371	return 0;
	372
5ea81769 AV	373	err_region:
	374	pci_release_region(pdev, i);
	375	err_inval:
	376	while (--i >= 0) {
fb4d64e7 FD	377	if (!(mask & (1 << i)))
fb4d64e7 FD	378	continue;
5ea81769 AV	379	pcim_iounmap(pdev, iomap[i]);
	380	pci_release_region(pdev, i);
	381	}
	382
	383	return rc;
	384	}
	385	EXPORT_SYMBOL(pcim_iomap_regions);
ec04b075	386
916fbfb7 TH	387	/**
	388	* pcim_iomap_regions_request_all - Request all BARs and iomap specified ones
	389	* @pdev: PCI device to map IO resources for
	390	* @mask: Mask of BARs to iomap
	391	* @name: Name used when requesting regions
	392	*
	393	* Request all PCI BARs and iomap regions specified by @mask.
	394	*/
fb7ebfe4	395	int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
916fbfb7 TH	396	const char *name)
	397	{
	398	int request_mask = ((1 << 6) - 1) & ~mask;
	399	int rc;
	400
	401	rc = pci_request_selected_regions(pdev, request_mask, name);
	402	if (rc)
	403	return rc;
	404
	405	rc = pcim_iomap_regions(pdev, mask, name);
	406	if (rc)
	407	pci_release_selected_regions(pdev, request_mask);
	408	return rc;
	409	}
	410	EXPORT_SYMBOL(pcim_iomap_regions_request_all);
	411
ec04b075 TH	412	/**
	413	* pcim_iounmap_regions - Unmap and release PCI BARs
	414	* @pdev: PCI device to map IO resources for
	415	* @mask: Mask of BARs to unmap and release
	416	*
4d45ada3	417	* Unmap and release regions specified by @mask.
ec04b075	418	*/
fb7ebfe4	419	void pcim_iounmap_regions(struct pci_dev *pdev, int mask)
ec04b075 TH	420	{
	421	void __iomem * const *iomap;
	422	int i;
	423
	424	iomap = pcim_iomap_table(pdev);
	425	if (!iomap)
	426	return;
	427
	428	for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
	429	if (!(mask & (1 << i)))
	430	continue;
	431
	432	pcim_iounmap(pdev, iomap[i]);
	433	pci_release_region(pdev, i);
	434	}
	435	}
	436	EXPORT_SYMBOL(pcim_iounmap_regions);
571806a9	437	#endif /* CONFIG_PCI */