[ARM] Remove '__address' from scatterlist and convert to DMA API

The old __address element in struct scatterlist remained from older
kernels because the ARM DMA emulation code made use of it.  Move
this field into struct dma_struct, and convert DMA emulation code
to setup a SG entry as required.

Also, convert DMA emulation code to use the new DMA API rather
than the PCI DMA API.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 13 insertions, 9 deletions

diff --git a/arch/arm/kernel/dma-isa.c b/arch/arm/kernel/dma-isa.c
index e9a36304ec3e..03532769a97f 100644
--- a/arch/arm/kernel/dma-isa.c
+++ b/arch/arm/kernel/dma-isa.c
@@ -18,7 +18,7 @@
  */
 #include <linux/ioport.h>
 #include <linux/init.h>
-#include <linux/pci.h>
+#include <linux/dma-mapping.h>
 
 #include <asm/dma.h>
 #include <asm/io.h>
@@ -65,37 +65,41 @@ static void isa_enable_dma(dmach_t channel, dma_t *dma)
 {
         if (dma->invalid) {
                 unsigned long address, length;
-                unsigned int mode, direction;
+                unsigned int mode;
+                enum dma_data_direction direction;
 
                 mode = channel & 3;
                 switch (dma->dma_mode & DMA_MODE_MASK) {
                 case DMA_MODE_READ:
                         mode |= ISA_DMA_MODE_READ;
-                        direction = PCI_DMA_FROMDEVICE;
+                        direction = DMA_FROM_DEVICE;
                         break;
 
                 case DMA_MODE_WRITE:
                         mode |= ISA_DMA_MODE_WRITE;
-                        direction = PCI_DMA_TODEVICE;
+                        direction = DMA_TO_DEVICE;
                         break;
 
                 case DMA_MODE_CASCADE:
                         mode |= ISA_DMA_MODE_CASCADE;
-                        direction = PCI_DMA_BIDIRECTIONAL;
+                        direction = DMA_BIDIRECTIONAL;
                         break;
 
                 default:
-                        direction = PCI_DMA_NONE;
+                        direction = DMA_NONE;
                         break;
                 }
 
-                if (!dma->using_sg) {
+                if (!dma->sg) {
                         /*
                          * Cope with ISA-style drivers which expect cache
                          * coherence.
                          */
-                        dma->buf.dma_address = pci_map_single(NULL,
-                                dma->buf.__address, dma->buf.length,
+                        dma->sg = &dma->buf;
+                        dma->sgcount = 1;
+                        dma->buf.length = dma->count;
+                        dma->buf.dma_address = dma_map_single(NULL,
+                                dma->addr, dma->count,
                                 direction);
                 }