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Commit d24bbbf2 authored by Tejun Heo's avatar Tejun Heo Committed by Jeff Garzik
Browse files

devres: implement pcim_iomap_regions() 



Implement pcim_iomap_regions().  This function takes mask of BARs to
request and iomap.  No BAR should have length of zero.  BARs are
iomapped using pcim_iomap_table().

Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent b878ca5d

include/linux/io.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -45,6 +45,8 @@ void __iomem * pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen); 
void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);

void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);

void __iomem * const * pcim_iomap_table(struct pci_dev *pdev);

void __iomem * const * pcim_iomap_table(struct pci_dev *pdev);





int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);



/**

/**

 *	check_signature		-	find BIOS signatures

 *	check_signature		-	find BIOS signatures

 *	@io_addr: mmio address to check

 *	@io_addr: mmio address to check

lib/iomap.c

+53 −0
Original line number Original line Diff line number Diff line
@@ -498,3 +498,56 @@ void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr) 
	WARN_ON(1);

	WARN_ON(1);

}

}

EXPORT_SYMBOL(pcim_iounmap);

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_region;



		rc = -ENOMEM;

		if (!pcim_iomap(pdev, i, 0))

			goto err_iomap;

	}



	return 0;



 err_iomap:

	pcim_iounmap(pdev, iomap[i]);

 err_region:

	pci_release_region(pdev, i);

 err_inval:

	while (--i >= 0) {

		pcim_iounmap(pdev, iomap[i]);

		pci_release_region(pdev, i);

	}



	return rc;

}

EXPORT_SYMBOL(pcim_iomap_regions);