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Commit 916fbfb7 authored by Tejun Heo's avatar Tejun Heo Committed by Jeff Garzik
Browse files

devres: implement pcim_iomap_regions_request_all() 



Some drivers need to reserve all PCI BARs to prevent other drivers
misusing unoccupied BARs.  pcim_iomap_regions_request_all() requests
all BARs and iomap specified BARs.

Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent 233f1120

include/linux/pci.h

+2 −0
Original line number Diff line number Diff line
@@ -1045,6 +1045,8 @@ void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen); 
void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);

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

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

int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask,

				   const char *name);

void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);



extern int pci_pci_problems;

lib/devres.c

+25 −0
Original line number Diff line number Diff line
@@ -297,6 +297,31 @@ int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name) 
}

EXPORT_SYMBOL(pcim_iomap_regions);



/**

 * pcim_iomap_regions_request_all - Request all BARs and iomap specified ones

 * @pdev: PCI device to map IO resources for

 * @mask: Mask of BARs to iomap

 * @name: Name used when requesting regions

 *

 * Request all PCI BARs and iomap regions specified by @mask.

 */

int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask,

				   const char *name)

{

	int request_mask = ((1 << 6) - 1) & ~mask;

	int rc;



	rc = pci_request_selected_regions(pdev, request_mask, name);

	if (rc)

		return rc;



	rc = pcim_iomap_regions(pdev, mask, name);

	if (rc)

		pci_release_selected_regions(pdev, request_mask);

	return rc;

}

EXPORT_SYMBOL(pcim_iomap_regions_request_all);



/**

 * pcim_iounmap_regions - Unmap and release PCI BARs

 * @pdev: PCI device to map IO resources for