From 916fbfb7ae5f8c8f86399794d89e6d273df8826b Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Wed, 12 Mar 2008 15:26:34 +0900 Subject: [PATCH] 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: Tejun Heo Cc: Greg Kroah-Hartman Cc: Alan Cox Cc: Jeff Garzik Signed-off-by: Jeff Garzik --- include/linux/pci.h | 2 ++ lib/devres.c | 25 +++++++++++++++++++++++++ 2 files changed, 27 insertions(+) diff --git a/include/linux/pci.h b/include/linux/pci.h index 9010f5458767..b7e4b633c69b 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -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; diff --git a/lib/devres.c b/lib/devres.c index b1d336ce7f3d..edc27a5d1b73 100644 --- a/lib/devres.c +++ b/lib/devres.c @@ -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 -- GitLab