Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5ca24814247fa4c039b893bf80fc05d0e5d41b00 Commit: 5ca24814247fa4c039b893bf80fc05d0e5d41b00 Parent: 4e68fc97b17470365a65bc569523dd9012730e44 Author: Rolf Eike Beer <[EMAIL PROTECTED]> AuthorDate: Thu Jul 19 17:48:44 2007 -0700 Committer: Greg Kroah-Hartman <[EMAIL PROTECTED]> CommitDate: Wed Aug 22 14:48:40 2007 -0700
PCI: Document pci_iomap() This useful interface is hardly mentioned anywhere in the in-tree documentation. Signed-off-by: Rolf Eike Beer <[EMAIL PROTECTED]> Cc: Tejun Heo <[EMAIL PROTECTED]> Acked-by: Randy Dunlap <[EMAIL PROTECTED]> Signed-off-by: Andrew Morton <[EMAIL PROTECTED]> Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]> --- Documentation/DocBook/deviceiobook.tmpl | 3 ++- include/asm-i386/io.h | 3 +++ lib/iomap.c | 15 ++++++++++++++- 3 files changed, 19 insertions(+), 2 deletions(-) diff --git a/Documentation/DocBook/deviceiobook.tmpl b/Documentation/DocBook/deviceiobook.tmpl index 90ed23d..c917de6 100644 --- a/Documentation/DocBook/deviceiobook.tmpl +++ b/Documentation/DocBook/deviceiobook.tmpl @@ -316,7 +316,8 @@ CPU B: spin_unlock_irqrestore(&dev_lock, flags) <chapter id="pubfunctions"> <title>Public Functions Provided</title> -!Einclude/asm-i386/io.h +!Iinclude/asm-i386/io.h +!Elib/iomap.c </chapter> </book> diff --git a/include/asm-i386/io.h b/include/asm-i386/io.h index 7b65b5b..e8e0bd6 100644 --- a/include/asm-i386/io.h +++ b/include/asm-i386/io.h @@ -112,6 +112,9 @@ extern void __iomem * __ioremap(unsigned long offset, unsigned long size, unsign * writew/writel functions and the other mmio helpers. The returned * address is not guaranteed to be usable directly as a virtual * address. + * + * If the area you are trying to map is a PCI BAR you should have a + * look at pci_iomap(). */ static inline void __iomem * ioremap(unsigned long offset, unsigned long size) diff --git a/lib/iomap.c b/lib/iomap.c index a57d262..864f2ec 100644 --- a/lib/iomap.c +++ b/lib/iomap.c @@ -240,7 +240,20 @@ void ioport_unmap(void __iomem *addr) EXPORT_SYMBOL(ioport_map); EXPORT_SYMBOL(ioport_unmap); -/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */ +/** + * pci_iomap - create a virtual mapping cookie for a PCI BAR + * @dev: PCI device that owns the BAR + * @bar: BAR number + * @maxlen: length of the memory to map + * + * Using this function you will get a __iomem address to your device BAR. + * You can access it using ioread*() and iowrite*(). These functions hide + * the details if this is a MMIO or PIO address space and will just do what + * you expect from them in the correct way. + * + * @maxlen specifies the maximum length to map. If you want to get access to + * the complete BAR without checking for its length first, pass %0 here. + * */ void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) { unsigned long start = pci_resource_start(dev, bar); - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html