From b923650b84068b74b6df838aa8f9b2a350171de6 Mon Sep 17 00:00:00 2001
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: Mon, 30 Jan 2012 00:20:48 +0200
Subject: [PATCH] lib: add NO_GENERIC_PCI_IOPORT_MAP
Some architectures need to override the way
IO port mapping is done on PCI devices.
Supply a generic macro that calls
ioport_map, and make it possible for architectures
to override.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
---
include/asm-generic/pci_iomap.h | 10 ++++++++++
lib/Kconfig | 3 +++
lib/pci_iomap.c | 2 +-
3 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/include/asm-generic/pci_iomap.h b/include/asm-generic/pci_iomap.h
index 8de4b73e19e2..e58fcf891370 100644
--- a/include/asm-generic/pci_iomap.h
+++ b/include/asm-generic/pci_iomap.h
@@ -15,6 +15,16 @@ struct pci_dev;
#ifdef CONFIG_PCI
/* Create a virtual mapping cookie for a PCI BAR (memory or IO) */
extern void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max);
+/* Create a virtual mapping cookie for a port on a given PCI device.
+ * Do not call this directly, it exists to make it easier for architectures
+ * to override */
+#ifdef CONFIG_NO_GENERIC_PCI_IOPORT_MAP
+extern void __iomem *__pci_ioport_map(struct pci_dev *dev, unsigned long port,
+ unsigned int nr);
+#else
+#define __pci_ioport_map(dev, port, nr) ioport_map((port), (nr))
+#endif
+
#else
static inline void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
{
diff --git a/lib/Kconfig b/lib/Kconfig
index 169eb7c598e5..1df13883481c 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -19,6 +19,9 @@ config RATIONAL
config GENERIC_FIND_FIRST_BIT
bool
+config NO_GENERIC_PCI_IOPORT_MAP
+ bool
+
config GENERIC_PCI_IOMAP
bool
diff --git a/lib/pci_iomap.c b/lib/pci_iomap.c
index 4b0fdc22e688..0d83ea8a9605 100644
--- a/lib/pci_iomap.c
+++ b/lib/pci_iomap.c
@@ -34,7 +34,7 @@ void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
if (maxlen && len > maxlen)
len = maxlen;
if (flags & IORESOURCE_IO)
- return ioport_map(start, len);
+ return __pci_ioport_map(dev, start, len);
if (flags & IORESOURCE_MEM) {
if (flags & IORESOURCE_CACHEABLE)
return ioremap(start, len);