MIPS: remove the old dma-default implementation

Now unused.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Patchwork: https://patchwork.linux-mips.org/patch/19551/Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Tom Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: iommu@lists.linux-foundation.org
Cc: linux-mips@linux-mips.org

arch/mips/Kconfig

@@ -78,9 +78,6 @@ config MIPS
 	select SYSCTL_EXCEPTION_TRACE
 	select VIRT_TO_BUS
 
-config MIPS_DMA_DEFAULT
-	bool
-
 menu "Machine selection"
 
 choice
@@ -1119,7 +1116,7 @@ config DMA_NONCOHERENT
 	select NEED_DMA_MAP_STATE
 	select DMA_NONCOHERENT_MMAP
 	select DMA_NONCOHERENT_CACHE_SYNC
-	select DMA_NONCOHERENT_OPS if !MIPS_DMA_DEFAULT
+	select DMA_NONCOHERENT_OPS
 
 config SYS_HAS_EARLY_PRINTK
 	bool

arch/mips/include/asm/dma-mapping.h

@@ -11,7 +11,6 @@
 #endif
 
 extern const struct dma_map_ops jazz_dma_ops;
-extern const struct dma_map_ops mips_default_dma_map_ops;
 extern const struct dma_map_ops mips_swiotlb_ops;
 
 static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
@@ -20,8 +19,6 @@ static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
 	return &jazz_dma_ops;
 #elif defined(CONFIG_SWIOTLB)
 	return &mips_swiotlb_ops;
-#elif defined(CONFIG_MIPS_DMA_DEFAULT)
-	return &mips_default_dma_map_ops;
 #elif defined(CONFIG_DMA_NONCOHERENT_OPS)
 	return &dma_noncoherent_ops;
 #else

arch/mips/include/asm/mach-generic/dma-coherence.h

-/*
- * 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@linux-mips.org>
- *
- */
-#ifndef __ASM_MACH_GENERIC_DMA_COHERENCE_H
-#define __ASM_MACH_GENERIC_DMA_COHERENCE_H
-
-struct device;
-
-static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr,
-	size_t size)
-{
-	return virt_to_phys(addr);
-}
-
-static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
-	struct page *page)
-{
-	return page_to_phys(page);
-}
-
-static inline unsigned long plat_dma_addr_to_phys(struct device *dev,
-	dma_addr_t dma_addr)
-{
-	return dma_addr;
-}
-
-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)
-{
-	/*
-	 * we fall back to GFP_DMA when the mask isn't all 1s,
-	 * so we can't guarantee allocations that must be
-	 * within a tighter range than GFP_DMA..
-	 */
-	if (mask < DMA_BIT_MASK(24))
-		return 0;
-
-	return 1;
-}
-
-static inline int plat_device_is_coherent(struct device *dev)
-{
-#ifdef CONFIG_DMA_PERDEV_COHERENT
-	return dev->archdata.dma_coherent;
-#else
-	switch (coherentio) {
-	default:
-	case IO_COHERENCE_DEFAULT:
-		return hw_coherentio;
-	case IO_COHERENCE_ENABLED:
-		return 1;
-	case IO_COHERENCE_DISABLED:
-		return 0;
-	}
-#endif
-}
-
-#ifndef plat_post_dma_flush
-static inline void plat_post_dma_flush(struct device *dev)
-{
-}
-#endif
-
-#endif /* __ASM_MACH_GENERIC_DMA_COHERENCE_H */

arch/mips/mm/Makefile

@@ -17,7 +17,6 @@ obj-$(CONFIG_32BIT)		+= ioremap.o pgtable-32.o
 obj-$(CONFIG_64BIT)		+= pgtable-64.o
 obj-$(CONFIG_HIGHMEM)		+= highmem.o
 obj-$(CONFIG_HUGETLB_PAGE)	+= hugetlbpage.o
-obj-$(CONFIG_MIPS_DMA_DEFAULT)	+= dma-default.o
 obj-$(CONFIG_DMA_NONCOHERENT)	+= dma-noncoherent.o
 obj-$(CONFIG_SWIOTLB)		+= dma-swiotlb.o