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#include <linux/pci.h>

#include <linux/io.h>

#include <linux/module.h>

static 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, unsigned long 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, unsigned long 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)

{

        iounmap(addr);

        WARN_ON(devres_destroy(dev, devm_ioremap_release, devm_ioremap_match,

                               (void *)addr));

}

EXPORT_SYMBOL(devm_iounmap);

#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, (void *)addr));

}

EXPORT_SYMBOL(devm_ioport_unmap);

#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, u16 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_iounmap_regions - Unmap and release PCI BARs

 * @pdev: PCI device to map IO resources for

 * @mask: Mask of BARs to unmap and release

 *

 * Unamp and release regions specified by @mask.

 */

void pcim_iounmap_regions(struct pci_dev *pdev, u16 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

#endif