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Commit 0b400c7e authored by Yu Zhao's avatar Yu Zhao Committed by Jesse Barnes
Browse files

PCI: export __pci_read_base() 



Export __pci_read_base() so it can be used by whole PCI subsystem.

Signed-off-by: default avatarYu Zhao <yu.zhao@intel.com>
Signed-off-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
parent bc5f5a82

drivers/pci/pci.h

+9 −0
Original line number Diff line number Diff line
@@ -162,6 +162,15 @@ struct pci_slot_attribute { 
};

#define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)



enum pci_bar_type {

	pci_bar_unknown,	/* Standard PCI BAR probe */

	pci_bar_io,		/* An io port BAR */

	pci_bar_mem32,		/* A 32-bit memory BAR */

	pci_bar_mem64,		/* A 64-bit memory BAR */

};



extern int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,

				struct resource *res, unsigned int reg);

extern void pci_enable_ari(struct pci_dev *dev);

/**

 * pci_ari_enabled - query ARI forwarding status

drivers/pci/probe.c

+9 −11
Original line number Diff line number Diff line
@@ -135,13 +135,6 @@ static u64 pci_size(u64 base, u64 maxbase, u64 mask) 
	return size;

}



enum pci_bar_type {

	pci_bar_unknown,	/* Standard PCI BAR probe */

	pci_bar_io,		/* An io port BAR */

	pci_bar_mem32,		/* A 32-bit memory BAR */

	pci_bar_mem64,		/* A 64-bit memory BAR */

};



static inline enum pci_bar_type decode_bar(struct resource *res, u32 bar)

{

	if ((bar & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
@@ -156,11 +149,16 @@ static inline enum pci_bar_type decode_bar(struct resource *res, u32 bar) 
	return pci_bar_mem32;

}



/*

 * If the type is not unknown, we assume that the lowest bit is 'enable'.

 * Returns 1 if the BAR was 64-bit and 0 if it was 32-bit.

/**

 * pci_read_base - read a PCI BAR

 * @dev: the PCI device

 * @type: type of the BAR

 * @res: resource buffer to be filled in

 * @pos: BAR position in the config space

 *

 * Returns 1 if the BAR is 64-bit, or 0 if 32-bit.

 */

static int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,

int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,

			struct resource *res, unsigned int pos)

{

	u32 l, sz, mask;