Switch the footbridge PCI devices to use dma_direct_set_offset to set the
DMA offset instead of using direct hooks into the DMA mapping code and
remove the now unused hooks.
Signed-off-by: Christoph Hellwig
---
arch/arm/include/asm/dma-direct.h | 4 +-
arch/arm/include/asm/memory.h | 2 -
arch/arm/mach-footbridge/cats-pci.c | 7 +++-
arch/arm/mach-footbridge/common.c | 40 ++-
arch/arm/mach-footbridge/common.h | 3 ++
arch/arm/mach-footbridge/ebsa285-pci.c| 7 +++-
.../arm/mach-footbridge/include/mach/memory.h | 4 --
arch/arm/mach-footbridge/netwinder-pci.c | 7 +++-
arch/arm/mach-footbridge/personal-pci.c | 7 +++-
9 files changed, 54 insertions(+), 27 deletions(-)
diff --git a/arch/arm/include/asm/dma-direct.h
b/arch/arm/include/asm/dma-direct.h
index 77fcb7ee5ec907..1f04a5e1c615de 100644
--- a/arch/arm/include/asm/dma-direct.h
+++ b/arch/arm/include/asm/dma-direct.h
@@ -13,12 +13,12 @@ static inline dma_addr_t pfn_to_dma(struct device *dev,
unsigned long pfn)
{
if (dev && dev->dma_range_map)
pfn = PFN_DOWN(translate_phys_to_dma(dev, PFN_PHYS(pfn)));
- return (dma_addr_t)__pfn_to_bus(pfn);
+ return (dma_addr_t)__pfn_to_phys(pfn);
}
static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr)
{
- unsigned long pfn = __bus_to_pfn(addr);
+ unsigned long pfn = __phys_to_pfn(addr);
if (dev && dev->dma_range_map)
pfn = PFN_DOWN(translate_dma_to_phys(dev, PFN_PHYS(pfn)));
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h
index 99035b5891ef44..af612606136ff2 100644
--- a/arch/arm/include/asm/memory.h
+++ b/arch/arm/include/asm/memory.h
@@ -346,8 +346,6 @@ static inline unsigned long __virt_to_idmap(unsigned long x)
#ifndef __virt_to_bus
#define __virt_to_bus __virt_to_phys
#define __bus_to_virt __phys_to_virt
-#define __pfn_to_bus(x)__pfn_to_phys(x)
-#define __bus_to_pfn(x)__phys_to_pfn(x)
#endif
/*
diff --git a/arch/arm/mach-footbridge/cats-pci.c
b/arch/arm/mach-footbridge/cats-pci.c
index 0b2fd7e2e9b429..257cb068ac0c5b 100644
--- a/arch/arm/mach-footbridge/cats-pci.c
+++ b/arch/arm/mach-footbridge/cats-pci.c
@@ -13,6 +13,7 @@
#include
#include
#include
+#include "common.h"
/* cats host-specific stuff */
static int irqmap_cats[] __initdata = { IRQ_PCI, IRQ_IN0, IRQ_IN1, IRQ_IN3 };
@@ -56,8 +57,10 @@ static struct hw_pci cats_pci __initdata = {
static int __init cats_pci_init(void)
{
- if (machine_is_cats())
- pci_common_init(_pci);
+ if (!machine_is_cats())
+ return 0;
+ bus_register_notifier(_bus_type, _pci_dma_nb);
+ pci_common_init(_pci);
return 0;
}
diff --git a/arch/arm/mach-footbridge/common.c
b/arch/arm/mach-footbridge/common.c
index eee095f0e2f6c2..dc14d72ca7bb3f 100644
--- a/arch/arm/mach-footbridge/common.c
+++ b/arch/arm/mach-footbridge/common.c
@@ -12,6 +12,8 @@
#include
#include
#include
+#include
+#include
#include
#include
@@ -219,8 +221,17 @@ void footbridge_restart(enum reboot_mode mode, const char
*cmd)
}
}
-#ifdef CONFIG_FOOTBRIDGE_ADDIN
-
+#ifdef CONFIG_FOOTBRIDGE_HOST
+/*
+ * The footbridge is programmed to expose the system RAM at 0xe000.
+ * The requirement is that the RAM isn't placed at bus address 0, which
+ * would clash with VGA cards.
+ */
+static inline unsigned long fb_bus_sdram_offset(void)
+{
+ return 0xe000;
+}
+#elif defined(CONFIG_FOOTBRIDGE_ADDIN)
static inline unsigned long fb_bus_sdram_offset(void)
{
return *CSR_PCISDRAMBASE & 0xfff0;
@@ -248,17 +259,24 @@ unsigned long __bus_to_virt(unsigned long res)
return res;
}
EXPORT_SYMBOL(__bus_to_virt);
+#else
+#error "Undefined footbridge mode"
+#endif
-unsigned long __pfn_to_bus(unsigned long pfn)
+static int footbridge_pci_dma_notifier(struct notifier_block *nb,
+ unsigned long event, void *data)
{
- return __pfn_to_phys(pfn) + (fb_bus_sdram_offset() - PHYS_OFFSET);
-}
-EXPORT_SYMBOL(__pfn_to_bus);
+ struct device *dev = data;
-unsigned long __bus_to_pfn(unsigned long bus)
-{
- return __phys_to_pfn(bus - (fb_bus_sdram_offset() - PHYS_OFFSET));
+ if (event != BUS_NOTIFY_ADD_DEVICE)
+ return NOTIFY_DONE;
+
+ if (dma_direct_set_offset(dev, PAGE_OFFSET, fb_bus_sdram_offset(),
+ (u64)-1))
+ WARN_ONCE(1, "failed to set DMA offset\n");
+ return NOTIFY_OK;
}
-EXPORT_SYMBOL(__bus_to_pfn);
-#endif
+struct notifier_block footbridge_pci_dma_nb = {
+ .notifier_call = footbridge_pci_dma_notifier,
+};
diff --git a/arch/arm/mach-footbridge/common.h
b/arch/arm/mach-footbridge/common.h
index e12587db59c4c8..1773a4183b580c 100644
--- a/arch/arm/mach-footbridge/common.h
+++ b/arch/arm/mach-footbridge/common.h
@@ -1,4 +1,5 @@
/*
