Provide phys_to_dma/dma_to_phys helpers only if PCI support is
enabled, everything else is generic.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
arch/mips/Kconfig | 1 -
arch/mips/ath25/Kconfig | 1 +
.../include/asm/mach-ath25/dma-coherence.h | 71 -------------------
arch/mips/pci/pci-ar2315.c | 24 +++++++
4 files changed, 25 insertions(+), 72 deletions(-)
delete mode 100644 arch/mips/include/asm/mach-ath25/dma-coherence.h
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index bde16399a8fe..25a3c3262554 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -176,7 +176,6 @@ config ATH25
select DMA_NONCOHERENT
select IRQ_MIPS_CPU
select IRQ_DOMAIN
- select MIPS_DMA_DEFAULT
select SYS_HAS_CPU_MIPS32_R1
select SYS_SUPPORTS_BIG_ENDIAN
select SYS_SUPPORTS_32BIT_KERNEL
diff --git a/arch/mips/ath25/Kconfig b/arch/mips/ath25/Kconfig
index 7070b4bcd01d..2c1dfd06c366 100644
--- a/arch/mips/ath25/Kconfig
+++ b/arch/mips/ath25/Kconfig
@@ -12,6 +12,7 @@ config SOC_AR2315
config PCI_AR2315
bool "Atheros AR2315 PCI controller support"
depends on SOC_AR2315
+ select ARCH_HAS_PHYS_TO_DMA
select HW_HAS_PCI
select PCI
default y
diff --git a/arch/mips/include/asm/mach-ath25/dma-coherence.h b/arch/mips/include/asm/mach-ath25/dma-coherence.h
deleted file mode 100644
index 124755d4f079..000000000000
--- a/arch/mips/include/asm/mach-ath25/dma-coherence.h
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * 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.
- *
- * Copyright (C) 2006 Ralf Baechle <ralf@xxxxxxxxxxxxxx>
- * Copyright (C) 2007 Felix Fietkau <nbd@xxxxxxxxxxx>
- *
- */
-#ifndef __ASM_MACH_ATH25_DMA_COHERENCE_H
-#define __ASM_MACH_ATH25_DMA_COHERENCE_H
-
-#include <linux/device.h>
-
-/*
- * We need some arbitrary non-zero value to be programmed to the BAR1 register
- * of PCI host controller to enable DMA. The same value should be used as the
- * offset to calculate the physical address of DMA buffer for PCI devices.
- */
-#define AR2315_PCI_HOST_SDRAM_BASEADDR 0x20000000
-
-static inline dma_addr_t ath25_dev_offset(struct device *dev)
-{
-#ifdef CONFIG_PCI
- extern struct bus_type pci_bus_type;
-
- if (dev && dev->bus == &pci_bus_type)
- return AR2315_PCI_HOST_SDRAM_BASEADDR;
-#endif
- return 0;
-}
-
-static inline dma_addr_t
-plat_map_dma_mem(struct device *dev, void *addr, size_t size)
-{
- return virt_to_phys(addr) + ath25_dev_offset(dev);
-}
-
-static inline dma_addr_t
-plat_map_dma_mem_page(struct device *dev, struct page *page)
-{
- return page_to_phys(page) + ath25_dev_offset(dev);
-}
-
-static inline unsigned long
-plat_dma_addr_to_phys(struct device *dev, dma_addr_t dma_addr)
-{
- return dma_addr - ath25_dev_offset(dev);
-}
-
-static inline void
-plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr, size_t size,
- enum dma_data_direction direction)
-{
-}
-
-static inline int plat_dma_supported(struct device *dev, u64 mask)
-{
- return 1;
-}
-
-static inline int plat_device_is_coherent(struct device *dev)
-{
- return 0;
-}
-
-static inline void plat_post_dma_flush(struct device *dev)
-{
-}
-
-#endif /* __ASM_MACH_ATH25_DMA_COHERENCE_H */
diff --git a/arch/mips/pci/pci-ar2315.c b/arch/mips/pci/pci-ar2315.c
index b4fa6413c4e5..c539d0d2b0cf 100644
--- a/arch/mips/pci/pci-ar2315.c
+++ b/arch/mips/pci/pci-ar2315.c
@@ -149,6 +149,13 @@
#define AR2315_PCI_HOST_SLOT 3
#define AR2315_PCI_HOST_DEVID ((0xff18 << 16) | PCI_VENDOR_ID_ATHEROS)
+/*
+ * We need some arbitrary non-zero value to be programmed to the BAR1 register
+ * of PCI host controller to enable DMA. The same value should be used as the
+ * offset to calculate the physical address of DMA buffer for PCI devices.
+ */
+#define AR2315_PCI_HOST_SDRAM_BASEADDR 0x20000000
+
/* ??? access BAR */
#define AR2315_PCI_HOST_MBAR0 0x10000000
/* RAM access BAR */
@@ -167,6 +174,23 @@ struct ar2315_pci_ctrl {
struct resource io_res;
};
+static inline dma_addr_t ar2315_dev_offset(struct device *dev)
+{
+ if (dev && dev_is_pci(dev))
+ return AR2315_PCI_HOST_SDRAM_BASEADDR;
+ return 0;
+}
+
+dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
+{
+ return paddr + ar2315_dev_offset(dev);
+}
+
+phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dma_addr)
+{
+ return dma_addr - ar2315_dev_offset(dev);
+}
+
static inline struct ar2315_pci_ctrl *ar2315_pci_bus_to_apc(struct pci_bus *bus)
{
struct pci_controller *hose = bus->sysdata;
--
2.17.0
