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authorMichael S. Tsirkin <mst@redhat.com>2011-11-24 20:45:20 +0200
committerMichael S. Tsirkin <mst@redhat.com>2011-11-28 21:12:42 +0200
commit66eab4df288aaee75938ae99877c4f759fc6d56c (patch)
tree0b663bfe2d464a55c2a85b27140a53b32f261542 /lib
parent4673ca8eb3690832e76371371955a8b02e1f59d4 (diff)
lib: add GENERIC_PCI_IOMAP
Many architectures want a generic pci_iomap but not the rest of iomap.c. Split that to a separate .c file and add a new config symbol. select automatically by GENERIC_IOMAP. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'lib')
-rw-r--r--lib/Kconfig4
-rw-r--r--lib/Makefile1
-rw-r--r--lib/iomap.c38
-rw-r--r--lib/pci_iomap.c48
4 files changed, 55 insertions, 36 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index 005892723a5..36884b409e3 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -19,8 +19,12 @@ config RATIONAL
config GENERIC_FIND_FIRST_BIT
bool
+config GENERIC_PCI_IOMAP
+ bool
+
config GENERIC_IOMAP
bool
+ select GENERIC_PCI_IOMAP
config CRC_CCITT
tristate "CRC-CCITT functions"
diff --git a/lib/Makefile b/lib/Makefile
index a4da283f5dc..609b2adc604 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -33,6 +33,7 @@ endif
lib-$(CONFIG_HOTPLUG) += kobject_uevent.o
obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
+obj-$(CONFIG_GENERIC_PCI_IOMAP) += pci_iomap.o
obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o
obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o
obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
diff --git a/lib/iomap.c b/lib/iomap.c
index 5dbcb4b2d86..ada922a808e 100644
--- a/lib/iomap.c
+++ b/lib/iomap.c
@@ -242,45 +242,11 @@ EXPORT_SYMBOL(ioport_unmap);
#endif /* CONFIG_HAS_IOPORT */
#ifdef CONFIG_PCI
-/**
- * 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)
-{
- resource_size_t start = pci_resource_start(dev, bar);
- resource_size_t len = pci_resource_len(dev, bar);
- unsigned long flags = pci_resource_flags(dev, bar);
-
- if (!len || !start)
- return NULL;
- if (maxlen && len > maxlen)
- len = maxlen;
- if (flags & IORESOURCE_IO)
- return ioport_map(start, len);
- if (flags & IORESOURCE_MEM) {
- if (flags & IORESOURCE_CACHEABLE)
- return ioremap(start, len);
- return ioremap_nocache(start, len);
- }
- /* What? */
- return NULL;
-}
-
+/* Hide the details if this is a MMIO or PIO address space and just do what
+ * you expect in the correct way. */
void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
{
IO_COND(addr, /* nothing */, iounmap(addr));
}
-EXPORT_SYMBOL(pci_iomap);
EXPORT_SYMBOL(pci_iounmap);
#endif /* CONFIG_PCI */
diff --git a/lib/pci_iomap.c b/lib/pci_iomap.c
new file mode 100644
index 00000000000..4b0fdc22e68
--- /dev/null
+++ b/lib/pci_iomap.c
@@ -0,0 +1,48 @@
+/*
+ * Implement the default iomap interfaces
+ *
+ * (C) Copyright 2004 Linus Torvalds
+ */
+#include <linux/pci.h>
+#include <linux/io.h>
+
+#include <linux/export.h>
+
+#ifdef CONFIG_PCI
+/**
+ * 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)
+{
+ resource_size_t start = pci_resource_start(dev, bar);
+ resource_size_t len = pci_resource_len(dev, bar);
+ unsigned long flags = pci_resource_flags(dev, bar);
+
+ if (!len || !start)
+ return NULL;
+ if (maxlen && len > maxlen)
+ len = maxlen;
+ if (flags & IORESOURCE_IO)
+ return ioport_map(start, len);
+ if (flags & IORESOURCE_MEM) {
+ if (flags & IORESOURCE_CACHEABLE)
+ return ioremap(start, len);
+ return ioremap_nocache(start, len);
+ }
+ /* What? */
+ return NULL;
+}
+
+EXPORT_SYMBOL(pci_iomap);
+#endif /* CONFIG_PCI */