Commit be9d2e89 authored by Johannes Thumshirn's avatar Johannes Thumshirn Committed by Bjorn Helgaas
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PCI: Add helpers to request/release memory and I/O regions 



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: default avatarChristoph Hellwig <hch@infradead.org>
Signed-off-by: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
parent 644a544f

include/linux/pci.h

+28 −0
Original line number Diff line number Diff line
@@ -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) { }