Now unused.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
arch/mips/Kconfig | 5 +-
arch/mips/include/asm/dma-mapping.h | 3 -
.../include/asm/mach-generic/dma-coherence.h | 73 ----
arch/mips/mm/Makefile | 1 -
arch/mips/mm/dma-default.c | 379 ------------------
5 files changed, 1 insertion(+), 460 deletions(-)
delete mode 100644 arch/mips/include/asm/mach-generic/dma-coherence.h
delete mode 100644 arch/mips/mm/dma-default.c
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 9ac3c6260b68..ad5a542bf094 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -72,9 +72,6 @@ config MIPS
select SYSCTL_EXCEPTION_TRACE
select VIRT_TO_BUS
-config MIPS_DMA_DEFAULT
- bool
-
menu "Machine selection"
choice
@@ -1113,7 +1110,7 @@ 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
diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h
index caf97f739897..143250986e17 100644
--- a/arch/mips/include/asm/dma-mapping.h
+++ b/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
diff --git a/arch/mips/include/asm/mach-generic/dma-coherence.h b/arch/mips/include/asm/mach-generic/dma-coherence.h
deleted file mode 100644
index 8ad7a40ca786..000000000000
--- a/arch/mips/include/asm/mach-generic/dma-coherence.h
+++ /dev/null
@@ -1,73 +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>
- *
- */
-#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 */
diff --git a/arch/mips/mm/Makefile b/arch/mips/mm/Makefile
index c6146c3805dc..6922f393af19 100644
--- a/arch/mips/mm/Makefile
+++ b/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
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
deleted file mode 100644
index 10b56e8a2076..000000000000
--- a/arch/mips/mm/dma-default.c
+++ /dev/null
@@ -1,379 +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) 2000 Ani Joshi <ajoshi@xxxxxxxxxxx>
- * Copyright (C) 2000, 2001, 06 Ralf Baechle <ralf@xxxxxxxxxxxxxx>
- * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
- */
-
-#include <linux/types.h>
-#include <linux/dma-mapping.h>
-#include <linux/mm.h>
-#include <linux/export.h>
-#include <linux/scatterlist.h>
-#include <linux/string.h>
-#include <linux/gfp.h>
-#include <linux/highmem.h>
-#include <linux/dma-contiguous.h>
-
-#include <asm/cache.h>
-#include <asm/cpu-type.h>
-#include <asm/io.h>
-
-#include <dma-coherence.h>
-
-static inline struct page *dma_addr_to_page(struct device *dev,
- dma_addr_t dma_addr)
-{
- return pfn_to_page(
- plat_dma_addr_to_phys(dev, dma_addr) >> PAGE_SHIFT);
-}
-
-/*
- * The affected CPUs below in 'cpu_needs_post_dma_flush()' can
- * speculatively fill random cachelines with stale data at any time,
- * requiring an extra flush post-DMA.
- *
- * Warning on the terminology - Linux calls an uncached area coherent;
- * MIPS terminology calls memory areas with hardware maintained coherency
- * coherent.
- *
- * Note that the R14000 and R16000 should also be checked for in this
- * condition. However this function is only called on non-I/O-coherent
- * systems and only the R10000 and R12000 are used in such systems, the
- * SGI IP28 Indigo² rsp. SGI IP32 aka O2.
- */
-static inline bool cpu_needs_post_dma_flush(struct device *dev)
-{
- if (plat_device_is_coherent(dev))
- return false;
-
- switch (boot_cpu_type()) {
- case CPU_R10000:
- case CPU_R12000:
- case CPU_BMIPS5000:
- return true;
-
- default:
- /*
- * Presence of MAARs suggests that the CPU supports
- * speculatively prefetching data, and therefore requires
- * the post-DMA flush/invalidate.
- */
- return cpu_has_maar;
- }
-}
-
-static gfp_t massage_gfp_flags(const struct device *dev, gfp_t gfp)
-{
- gfp_t dma_flag;
-
-#ifdef CONFIG_ISA
- if (dev == NULL)
- dma_flag = __GFP_DMA;
- else
-#endif
-#if defined(CONFIG_ZONE_DMA32) && defined(CONFIG_ZONE_DMA)
- if (dev == NULL || dev->coherent_dma_mask < DMA_BIT_MASK(32))
- dma_flag = __GFP_DMA;
- else if (dev->coherent_dma_mask < DMA_BIT_MASK(64))
- dma_flag = __GFP_DMA32;
- else
-#endif
-#if defined(CONFIG_ZONE_DMA32) && !defined(CONFIG_ZONE_DMA)
- if (dev == NULL || dev->coherent_dma_mask < DMA_BIT_MASK(64))
- dma_flag = __GFP_DMA32;
- else
-#endif
-#if defined(CONFIG_ZONE_DMA) && !defined(CONFIG_ZONE_DMA32)
- if (dev == NULL ||
- dev->coherent_dma_mask < DMA_BIT_MASK(sizeof(phys_addr_t) * 8))
- dma_flag = __GFP_DMA;
- else
-#endif
- dma_flag = 0;
-
- /* Don't invoke OOM killer */
- gfp |= __GFP_NORETRY;
-
- return gfp | dma_flag;
-}
-
-static void *mips_dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs)
-{
- void *ret;
- struct page *page = NULL;
- unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
-
- gfp = massage_gfp_flags(dev, gfp);
-
- if (IS_ENABLED(CONFIG_DMA_CMA) && gfpflags_allow_blocking(gfp))
- page = dma_alloc_from_contiguous(dev, count, get_order(size),
- gfp);
- if (!page)
- page = alloc_pages(gfp, get_order(size));
-
- if (!page)
- return NULL;
-
- ret = page_address(page);
- memset(ret, 0, size);
- *dma_handle = plat_map_dma_mem(dev, ret, size);
- if (!(attrs & DMA_ATTR_NON_CONSISTENT) &&
- !plat_device_is_coherent(dev)) {
- dma_cache_wback_inv((unsigned long) ret, size);
- ret = UNCAC_ADDR(ret);
- }
-
- return ret;
-}
-
-static void mips_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_handle, unsigned long attrs)
-{
- unsigned long addr = (unsigned long) vaddr;
- unsigned int count = PAGE_ALIGN(size) >> PAGE_SHIFT;
- struct page *page = NULL;
-
- plat_unmap_dma_mem(dev, dma_handle, size, DMA_BIDIRECTIONAL);
-
- if (!(attrs & DMA_ATTR_NON_CONSISTENT) && !plat_device_is_coherent(dev))
- addr = CAC_ADDR(addr);
-
- page = virt_to_page((void *) addr);
-
- if (!dma_release_from_contiguous(dev, page, count))
- __free_pages(page, get_order(size));
-}
-
-static int mips_dma_mmap(struct device *dev, struct vm_area_struct *vma,
- void *cpu_addr, dma_addr_t dma_addr, size_t size,
- unsigned long attrs)
-{
- unsigned long user_count = vma_pages(vma);
- unsigned long count = PAGE_ALIGN(size) >> PAGE_SHIFT;
- unsigned long addr = (unsigned long)cpu_addr;
- unsigned long off = vma->vm_pgoff;
- unsigned long pfn;
- int ret = -ENXIO;
-
- if (!plat_device_is_coherent(dev))
- addr = CAC_ADDR(addr);
-
- pfn = page_to_pfn(virt_to_page((void *)addr));
-
- if (attrs & DMA_ATTR_WRITE_COMBINE)
- vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
- else
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-
- if (dma_mmap_from_dev_coherent(dev, vma, cpu_addr, size, &ret))
- return ret;
-
- if (off < count && user_count <= (count - off)) {
- ret = remap_pfn_range(vma, vma->vm_start,
- pfn + off,
- user_count << PAGE_SHIFT,
- vma->vm_page_prot);
- }
-
- return ret;
-}
-
-static inline void __dma_sync_virtual(void *addr, size_t size,
- enum dma_data_direction direction)
-{
- switch (direction) {
- case DMA_TO_DEVICE:
- dma_cache_wback((unsigned long)addr, size);
- break;
-
- case DMA_FROM_DEVICE:
- dma_cache_inv((unsigned long)addr, size);
- break;
-
- case DMA_BIDIRECTIONAL:
- dma_cache_wback_inv((unsigned long)addr, size);
- break;
-
- default:
- BUG();
- }
-}
-
-/*
- * A single sg entry may refer to multiple physically contiguous
- * pages. But we still need to process highmem pages individually.
- * If highmem is not configured then the bulk of this loop gets
- * optimized out.
- */
-static inline void __dma_sync(struct page *page,
- unsigned long offset, size_t size, enum dma_data_direction direction)
-{
- size_t left = size;
-
- do {
- size_t len = left;
-
- if (PageHighMem(page)) {
- void *addr;
-
- if (offset + len > PAGE_SIZE) {
- if (offset >= PAGE_SIZE) {
- page += offset >> PAGE_SHIFT;
- offset &= ~PAGE_MASK;
- }
- len = PAGE_SIZE - offset;
- }
-
- addr = kmap_atomic(page);
- __dma_sync_virtual(addr + offset, len, direction);
- kunmap_atomic(addr);
- } else
- __dma_sync_virtual(page_address(page) + offset,
- size, direction);
- offset = 0;
- page++;
- left -= len;
- } while (left);
-}
-
-static void mips_dma_unmap_page(struct device *dev, dma_addr_t dma_addr,
- size_t size, enum dma_data_direction direction, unsigned long attrs)
-{
- if (cpu_needs_post_dma_flush(dev) && !(attrs & DMA_ATTR_SKIP_CPU_SYNC))
- __dma_sync(dma_addr_to_page(dev, dma_addr),
- dma_addr & ~PAGE_MASK, size, direction);
- plat_post_dma_flush(dev);
- plat_unmap_dma_mem(dev, dma_addr, size, direction);
-}
-
-static int mips_dma_map_sg(struct device *dev, struct scatterlist *sglist,
- int nents, enum dma_data_direction direction, unsigned long attrs)
-{
- int i;
- struct scatterlist *sg;
-
- for_each_sg(sglist, sg, nents, i) {
- if (!plat_device_is_coherent(dev) &&
- !(attrs & DMA_ATTR_SKIP_CPU_SYNC))
- __dma_sync(sg_page(sg), sg->offset, sg->length,
- direction);
-#ifdef CONFIG_NEED_SG_DMA_LENGTH
- sg->dma_length = sg->length;
-#endif
- sg->dma_address = plat_map_dma_mem_page(dev, sg_page(sg)) +
- sg->offset;
- }
-
- return nents;
-}
-
-static dma_addr_t mips_dma_map_page(struct device *dev, struct page *page,
- unsigned long offset, size_t size, enum dma_data_direction direction,
- unsigned long attrs)
-{
- if (!plat_device_is_coherent(dev) && !(attrs & DMA_ATTR_SKIP_CPU_SYNC))
- __dma_sync(page, offset, size, direction);
-
- return plat_map_dma_mem_page(dev, page) + offset;
-}
-
-static void mips_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
- int nhwentries, enum dma_data_direction direction,
- unsigned long attrs)
-{
- int i;
- struct scatterlist *sg;
-
- for_each_sg(sglist, sg, nhwentries, i) {
- if (!plat_device_is_coherent(dev) &&
- !(attrs & DMA_ATTR_SKIP_CPU_SYNC) &&
- direction != DMA_TO_DEVICE)
- __dma_sync(sg_page(sg), sg->offset, sg->length,
- direction);
- plat_unmap_dma_mem(dev, sg->dma_address, sg->length, direction);
- }
-}
-
-static void mips_dma_sync_single_for_cpu(struct device *dev,
- dma_addr_t dma_handle, size_t size, enum dma_data_direction direction)
-{
- if (cpu_needs_post_dma_flush(dev))
- __dma_sync(dma_addr_to_page(dev, dma_handle),
- dma_handle & ~PAGE_MASK, size, direction);
- plat_post_dma_flush(dev);
-}
-
-static void mips_dma_sync_single_for_device(struct device *dev,
- dma_addr_t dma_handle, size_t size, enum dma_data_direction direction)
-{
- if (!plat_device_is_coherent(dev))
- __dma_sync(dma_addr_to_page(dev, dma_handle),
- dma_handle & ~PAGE_MASK, size, direction);
-}
-
-static void mips_dma_sync_sg_for_cpu(struct device *dev,
- struct scatterlist *sglist, int nelems,
- enum dma_data_direction direction)
-{
- int i;
- struct scatterlist *sg;
-
- if (cpu_needs_post_dma_flush(dev)) {
- for_each_sg(sglist, sg, nelems, i) {
- __dma_sync(sg_page(sg), sg->offset, sg->length,
- direction);
- }
- }
- plat_post_dma_flush(dev);
-}
-
-static void mips_dma_sync_sg_for_device(struct device *dev,
- struct scatterlist *sglist, int nelems,
- enum dma_data_direction direction)
-{
- int i;
- struct scatterlist *sg;
-
- if (!plat_device_is_coherent(dev)) {
- for_each_sg(sglist, sg, nelems, i) {
- __dma_sync(sg_page(sg), sg->offset, sg->length,
- direction);
- }
- }
-}
-
-static int mips_dma_supported(struct device *dev, u64 mask)
-{
- return plat_dma_supported(dev, mask);
-}
-
-static void mips_dma_cache_sync(struct device *dev, void *vaddr, size_t size,
- enum dma_data_direction direction)
-{
- BUG_ON(direction == DMA_NONE);
-
- if (!plat_device_is_coherent(dev))
- __dma_sync_virtual(vaddr, size, direction);
-}
-
-const struct dma_map_ops mips_default_dma_map_ops = {
- .alloc = mips_dma_alloc_coherent,
- .free = mips_dma_free_coherent,
- .mmap = mips_dma_mmap,
- .map_page = mips_dma_map_page,
- .unmap_page = mips_dma_unmap_page,
- .map_sg = mips_dma_map_sg,
- .unmap_sg = mips_dma_unmap_sg,
- .sync_single_for_cpu = mips_dma_sync_single_for_cpu,
- .sync_single_for_device = mips_dma_sync_single_for_device,
- .sync_sg_for_cpu = mips_dma_sync_sg_for_cpu,
- .sync_sg_for_device = mips_dma_sync_sg_for_device,
- .dma_supported = mips_dma_supported,
- .cache_sync = mips_dma_cache_sync,
-};
-EXPORT_SYMBOL(mips_default_dma_map_ops);
--
2.17.0
