提交 afd29f90 编写于 作者: M Mika Westerberg 提交者: Rafael J. Wysocki

PCI: Add pci_find_resource()

Add a new helper function pci_find_resource() that can be used to find out
whether a given resource (for example from a child device) is contained
within given PCI device's standard resources.
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: NBjorn Helgaas <bhelgaas@google.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
上级 10b68700
...@@ -479,6 +479,30 @@ struct resource *pci_find_parent_resource(const struct pci_dev *dev, ...@@ -479,6 +479,30 @@ struct resource *pci_find_parent_resource(const struct pci_dev *dev,
} }
EXPORT_SYMBOL(pci_find_parent_resource); EXPORT_SYMBOL(pci_find_parent_resource);
/**
* pci_find_resource - Return matching PCI device resource
* @dev: PCI device to query
* @res: Resource to look for
*
* Goes over standard PCI resources (BARs) and checks if the given resource
* is partially or fully contained in any of them. In that case the
* matching resource is returned, %NULL otherwise.
*/
struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res)
{
int i;
for (i = 0; i < PCI_ROM_RESOURCE; i++) {
struct resource *r = &dev->resource[i];
if (r->start && resource_contains(r, res))
return r;
}
return NULL;
}
EXPORT_SYMBOL(pci_find_resource);
/** /**
* pci_find_pcie_root_port - return PCIe Root Port * pci_find_pcie_root_port - return PCIe Root Port
* @dev: PCI device to query * @dev: PCI device to query
......
...@@ -1126,6 +1126,7 @@ void pdev_enable_device(struct pci_dev *); ...@@ -1126,6 +1126,7 @@ void pdev_enable_device(struct pci_dev *);
int pci_enable_resources(struct pci_dev *, int mask); int pci_enable_resources(struct pci_dev *, int mask);
void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *), void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
int (*)(const struct pci_dev *, u8, u8)); int (*)(const struct pci_dev *, u8, u8));
struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res);
#define HAVE_PCI_REQ_REGIONS 2 #define HAVE_PCI_REQ_REGIONS 2
int __must_check pci_request_regions(struct pci_dev *, const char *); int __must_check pci_request_regions(struct pci_dev *, const char *);
int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *); int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
...@@ -1542,6 +1543,9 @@ static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, ...@@ -1542,6 +1543,9 @@ static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
int enable) int enable)
{ return 0; } { return 0; }
static inline struct resource *pci_find_resource(struct pci_dev *dev,
struct resource *res)
{ return NULL; }
static inline int pci_request_regions(struct pci_dev *dev, const char *res_name) static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
{ return -EIO; } { return -EIO; }
static inline void pci_release_regions(struct pci_dev *dev) { } static inline void pci_release_regions(struct pci_dev *dev) { }
......
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