From 916fbfb7ae5f8c8f86399794d89e6d273df8826b Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
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 <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: Jeff Garzik <jeff@garzik.org>
---
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 9010f54587672..b7e4b633c69b0 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 b1d336ce7f3d0..edc27a5d1b735 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
--
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