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PCI: Add helpers to request/release memory and I/O regions

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Add helpers to request and release a device's memory or I/O regions.

With these helpers in place, one does not need to select a device's memory
or I/O regions with pci_select_bars() prior to requesting or releasing
them.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Johannes Thumshirn 2016-06-07 09:44:01 +02:00 committed by Bjorn Helgaas
parent 644a544fd9
commit be9d2e8927
1 changed files with 28 additions and 0 deletions
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28
include/linux/pci.h
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@ -1402,6 +1402,34 @@ typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
unsigned int command_bits, u32 flags);
void pci_register_set_vga_state(arch_set_vga_state_t func);
static inline int
pci_request_io_regions(struct pci_dev *pdev, const char *name)
{
return pci_request_selected_regions(pdev,
pci_select_bars(pdev, IORESOURCE_IO), name);
}
static inline void
pci_release_io_regions(struct pci_dev *pdev)
{
return pci_release_selected_regions(pdev,
pci_select_bars(pdev, IORESOURCE_IO));
}
static inline int
pci_request_mem_regions(struct pci_dev *pdev, const char *name)
{
return pci_request_selected_regions(pdev,
pci_select_bars(pdev, IORESOURCE_MEM), name);
}
static inline void
pci_release_mem_regions(struct pci_dev *pdev)
{
return pci_release_selected_regions(pdev,
pci_select_bars(pdev, IORESOURCE_MEM));
}
#else /* CONFIG_PCI is not enabled */
static inline void pci_set_flags(int flags) { }