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authorMagnus Damm <magnus.damm@gmail.com>2008-01-24 18:40:50 +0900
committerPaul Mundt <lethal@linux-sh.org>2008-01-28 13:19:04 +0900
commita724605cb7a66d423a494a395f9a8ba871b8a1eb (patch)
tree4f6345db7b6fb3001782c688c6fd1f07ae9be1b6
parentf93e97eaead5c50af35d73cca7301ebbfdff116c (diff)
downloadop-kernel-dev-a724605cb7a66d423a494a395f9a8ba871b8a1eb.zip
op-kernel-dev-a724605cb7a66d423a494a395f9a8ba871b8a1eb.tar.gz
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>
-rw-r--r--arch/sh/boards/dreamcast/setup.c8
-rw-r--r--arch/sh/drivers/pci/Makefile3
-rw-r--r--arch/sh/drivers/pci/dma-dreamcast.c70
-rw-r--r--arch/sh/drivers/pci/fixups-dreamcast.c10
4 files changed, 11 insertions, 80 deletions
diff --git a/arch/sh/boards/dreamcast/setup.c b/arch/sh/boards/dreamcast/setup.c
index 8799df6..2581c8c 100644
--- a/arch/sh/boards/dreamcast/setup.c
+++ b/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
};
diff --git a/arch/sh/drivers/pci/Makefile b/arch/sh/drivers/pci/Makefile
index 7bf2a2c..07188057 100644
--- a/arch/sh/drivers/pci/Makefile
+++ b/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
diff --git a/arch/sh/drivers/pci/dma-dreamcast.c b/arch/sh/drivers/pci/dma-dreamcast.c
deleted file mode 100644
index 888a340..0000000
--- a/arch/sh/drivers/pci/dma-dreamcast.c
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * arch/sh/drivers/pci/dma-dreamcast.c
- *
- * PCI DMA support for the Sega Dreamcast
- *
- * Copyright (C) 2001, 2002 M. R. Brown
- * Copyright (C) 2002, 2003 Paul Mundt
- *
- * This file originally bore the message (with enclosed-$):
- * Id: pci.c,v 1.3 2003/05/04 19:29:46 lethal Exp
- * Dreamcast PCI: Supports SEGA Broadband Adaptor only.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/param.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/irq.h>
-#include <linux/pci.h>
-#include <linux/dma-mapping.h>
-#include <linux/device.h>
-
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/mach/pci.h>
-
-static int gapspci_dma_used = 0;
-
-void *dreamcast_consistent_alloc(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t flag)
-{
- unsigned long buf;
-
- if (dev && dev->bus != &pci_bus_type)
- return NULL;
-
- if (gapspci_dma_used + size > GAPSPCI_DMA_SIZE)
- return ERR_PTR(-EINVAL);
-
- buf = GAPSPCI_DMA_BASE + gapspci_dma_used;
-
- gapspci_dma_used = PAGE_ALIGN(gapspci_dma_used+size);
-
- *dma_handle = (dma_addr_t)buf;
-
- buf = P2SEGADDR(buf);
-
- /* Flush the dcache before we hand off the buffer */
- __flush_purge_region((void *)buf, size);
-
- return (void *)buf;
-}
-
-int dreamcast_consistent_free(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle)
-{
- if (dev && dev->bus != &pci_bus_type)
- return -EINVAL;
-
- /* XXX */
- gapspci_dma_used = 0;
-
- return 0;
-}
-
diff --git a/arch/sh/drivers/pci/fixups-dreamcast.c b/arch/sh/drivers/pci/fixups-dreamcast.c
index 6f53f82..c446993 100644
--- a/arch/sh/drivers/pci/fixups-dreamcast.c
+++ b/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");
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