lkml.org 
[lkml]   [2012]   [Jan]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 1/3] lib: add NO_GENERIC_PCI_IOPORT_MAP
Some architectures need to override the way
IO port mapping is does not PCI devices.
Supply a generic function that calls
ioport_map, and make it possible for architectures
to override.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
include/asm-generic/pci_iomap.h | 5 +++++
lib/Kconfig | 3 +++
lib/pci_iomap.c | 12 +++++++++++-
3 files changed, 19 insertions(+), 1 deletions(-)

diff --git a/include/asm-generic/pci_iomap.h b/include/asm-generic/pci_iomap.h
index 8de4b73..2aff58e 100644
--- a/include/asm-generic/pci_iomap.h
+++ b/include/asm-generic/pci_iomap.h
@@ -15,6 +15,11 @@ 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. */
+extern void __iomem *__pci_ioport_map(struct pci_dev *dev, unsigned long port,
+ unsigned int nr);
#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 169eb7c..1df1388 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 4b0fdc2..1dfda29 100644
--- a/lib/pci_iomap.c
+++ b/lib/pci_iomap.c
@@ -9,6 +9,16 @@
#include <linux/export.h>

#ifdef CONFIG_PCI
+#ifndef CONFIG_NO_GENERIC_PCI_IOPORT_MAP
+/* Architectures can override ioport mapping while
+ * still using the rest of the generic infrastructure. */
+void __iomem *__pci_ioport_map(struct pci_dev *dev,
+ unsigned long port,
+ unsigned int nr)
+{
+ return ioport_map(port, nr);
+}
+#endif
/**
* pci_iomap - create a virtual mapping cookie for a PCI BAR
* @dev: PCI device that owns the BAR
@@ -34,7 +44,7 @@ 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);
--
1.7.8.2.325.g247f9


\
 
 \ /
  Last update: 2012-01-30 13:19    [W:0.059 / U:1.520 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site