#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,			   resource_size_t 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,				   resource_size_t 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_ioremap_wc - Managed ioremap_wc() * @dev: Generic device to remap IO address for * @offset: BUS offset 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){	void __iomem **ptr, *addr; 	ptr = devres_alloc(devm_ioremap_release, sizeof(*ptr), GFP_KERNEL);	if (!ptr)		return NULL; 	addr = ioremap_wc(offset, size);	if (addr) {		*ptr = addr;		devres_add(dev, ptr);	} else		devres_free(ptr); 	return addr;}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); /** * 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, 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);	} 	dest_ptr = devm_ioremap(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); #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 */