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#include <linux/pci.h>
#include <linux/io.h>
#include <linux/gfp.h>
#include <linux/module.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)
{
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_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, u16 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, 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
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