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authorGlauber Costa <gcosta@redhat.com>2008-03-25 18:36:21 -0300
committerIngo Molnar <mingo@elte.hu>2008-04-19 19:19:56 +0200
commit22456b97148be300e25e9cb97244656775972475 (patch)
treed85225c64c776f61c9485a5ca1b06f32c53cc5fe /arch
parent6f5366354bf86f8d2c1cf241c9bbf44b2d350e30 (diff)
x86: implement dma_map_single through dma_ops
That's already the name of the game for x86_64. For i386, we add a pci-base_32.c, that will hold the default operations. The function call itself goes through dma-mapping.h , the common header Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/Makefile1
-rw-r--r--arch/x86/kernel/pci-base_32.c20
2 files changed, 21 insertions, 0 deletions
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 7a2a2e93e84..edd5c54ffde 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -26,6 +26,7 @@ obj-y += pci-dma_$(BITS).o bootflag.o e820_$(BITS).o
obj-y += quirks.o i8237.o topology.o kdebugfs.o
obj-y += alternative.o i8253.o
obj-$(CONFIG_X86_64) += pci-nommu_64.o bugs_64.o
+obj-$(CONFIG_X86_32) += pci-base_32.o
obj-y += tsc_$(BITS).o io_delay.o rtc.o
obj-$(CONFIG_X86_TRAMPOLINE) += trampoline.o
diff --git a/arch/x86/kernel/pci-base_32.c b/arch/x86/kernel/pci-base_32.c
new file mode 100644
index 00000000000..b613d735f76
--- /dev/null
+++ b/arch/x86/kernel/pci-base_32.c
@@ -0,0 +1,20 @@
+#include <linux/mm.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <asm/dma-mapping.h>
+
+static dma_addr_t pci32_map_single(struct device *dev, void *ptr,
+ size_t size, int direction)
+{
+ WARN_ON(size == 0);
+ flush_write_buffers();
+ return virt_to_phys(ptr);
+}
+
+static const struct dma_mapping_ops pci32_dma_ops = {
+ .map_single = pci32_map_single,
+};
+
+const struct dma_mapping_ops *dma_ops = &pci32_dma_ops;
+EXPORT_SYMBOL(dma_ops);