sh: use declared coherent memory for dreamcast pci ethernet adapter

This patch makes the dreamcast use the recently added declared coherent
memory functions to point out the memory window suitable for dma.

Apart from cleaning up, this gives the dreamcast a proper memory allocator
for pci dma memory.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/sh/boards/dreamcast/setup.c

@@ -33,9 +33,6 @@ extern void aica_time_init(void);
 extern int gapspci_init(void);
 extern int systemasic_irq_demux(int);
 
-void *dreamcast_consistent_alloc(struct device *, size_t, dma_addr_t *, gfp_t);
-int dreamcast_consistent_free(struct device *, size_t, void *, dma_addr_t);
-
 static void __init dreamcast_setup(char **cmdline_p)
 {
 	int i;
@@ -64,9 +61,4 @@ static struct sh_machine_vector mv_dreamcast __initmv = {
 	.mv_name		= "Sega Dreamcast",
 	.mv_setup		= dreamcast_setup,
 	.mv_irq_demux		= systemasic_irq_demux,
-
-#ifdef CONFIG_PCI
-	.mv_consistent_alloc	= dreamcast_consistent_alloc,
-	.mv_consistent_free	= dreamcast_consistent_free,
-#endif
 };

arch/sh/drivers/pci/Makefile

@@ -12,8 +12,7 @@ obj-$(CONFIG_CPU_SUBTYPE_SH7780)	+= pci-sh7780.o ops-sh4.o
 obj-$(CONFIG_CPU_SUBTYPE_SH7785)	+= pci-sh7780.o ops-sh4.o
 obj-$(CONFIG_CPU_SH5)			+= pci-sh5.o ops-sh5.o
 
-obj-$(CONFIG_SH_DREAMCAST)		+= ops-dreamcast.o fixups-dreamcast.o \
-					   dma-dreamcast.o
+obj-$(CONFIG_SH_DREAMCAST)		+= ops-dreamcast.o fixups-dreamcast.o
 obj-$(CONFIG_SH_SECUREEDGE5410)		+= ops-snapgear.o
 obj-$(CONFIG_SH_RTS7751R2D)		+= ops-rts7751r2d.o fixups-rts7751r2d.o
 obj-$(CONFIG_SH_SH03)			+= ops-sh03.o fixups-sh03.o

arch/sh/drivers/pci/fixups-dreamcast.c

@@ -22,6 +22,7 @@
 #include <linux/init.h>
 #include <linux/irq.h>
 #include <linux/pci.h>
+#include <linux/dma-mapping.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
@@ -40,6 +41,15 @@ static void __init gapspci_fixup_resources(struct pci_dev *dev)
 		 */
 		dev->resource[1].start	= p->io_resource->start  + 0x100;
 		dev->resource[1].end	= dev->resource[1].start + 0x200 - 1;
+		/*
+		 * Redirect dma memory allocations to special memory window.
+		 */
+		BUG_ON(!dma_declare_coherent_memory(&dev->dev,
+						GAPSPCI_DMA_BASE,
+						GAPSPCI_DMA_BASE,
+						GAPSPCI_DMA_SIZE,
+						DMA_MEMORY_MAP |
+						DMA_MEMORY_EXCLUSIVE));
 		break;
 	default:
 		printk("PCI: Failed resource fixup\n");