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kernel: add patch to inline mips dma mapping functions - reduces code size and improves performance 

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37763 3c298f89-4303-0410-b956-a3cf2f4a3e73
master
Felix Fietkau 2013-08-12 17:26:08 +00:00
parent 413a09f44c
commit 8f544d257d
3 changed files with 834 additions and 1 deletions
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172
target/linux/generic/patches-3.10/130-mips_remove_plat_dma_functions.patch Normal file
View File

@ -0,0 +1,172 @@
From: Felix Fietkau <nbd@openwrt.org>
Subject: [PATCH 1/2] MIPS: remove unnecessary platform dma helper functions
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
---
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -289,7 +289,6 @@ static void mips_dma_sync_single_for_cpu
static void mips_dma_sync_single_for_device(struct device *dev,
dma_addr_t dma_handle, size_t size, enum dma_data_direction direction)
{
- plat_extra_sync_for_device(dev);
if (!plat_device_is_coherent(dev))
__dma_sync(dma_addr_to_page(dev, dma_handle),
dma_handle & ~PAGE_MASK, size, direction);
@@ -323,7 +322,7 @@ static void mips_dma_sync_sg_for_device(
int mips_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
- return plat_dma_mapping_error(dev, dma_addr);
+ return 0;
}
int mips_dma_supported(struct device *dev, u64 mask)
@@ -336,7 +335,6 @@ void dma_cache_sync(struct device *dev,
{
BUG_ON(direction == DMA_NONE);
- plat_extra_sync_for_device(dev);
if (!plat_device_is_coherent(dev))
__dma_sync_virtual(vaddr, size, direction);
}
--- a/arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h
+++ b/arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h
@@ -46,22 +46,11 @@ static inline int plat_dma_supported(str
BUG();
}
-static inline void plat_extra_sync_for_device(struct device *dev)
-{
- BUG();
-}
-
static inline int plat_device_is_coherent(struct device *dev)
{
return 1;
}
-static inline int plat_dma_mapping_error(struct device *dev,
- dma_addr_t dma_addr)
-{
- BUG();
-}
-
dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr);
phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr);
--- a/arch/mips/include/asm/mach-generic/dma-coherence.h
+++ b/arch/mips/include/asm/mach-generic/dma-coherence.h
@@ -47,16 +47,6 @@ static inline int plat_dma_supported(str
return 1;
}
-static inline void plat_extra_sync_for_device(struct device *dev)
-{
-}
-
-static inline int plat_dma_mapping_error(struct device *dev,
- dma_addr_t dma_addr)
-{
- return 0;
-}
-
static inline int plat_device_is_coherent(struct device *dev)
{
#ifdef CONFIG_DMA_COHERENT
--- a/arch/mips/include/asm/mach-ip27/dma-coherence.h
+++ b/arch/mips/include/asm/mach-ip27/dma-coherence.h
@@ -58,16 +58,6 @@ static inline int plat_dma_supported(str
return 1;
}
-static inline void plat_extra_sync_for_device(struct device *dev)
-{
-}
-
-static inline int plat_dma_mapping_error(struct device *dev,
- dma_addr_t dma_addr)
-{
- return 0;
-}
-
static inline int plat_device_is_coherent(struct device *dev)
{
return 1; /* IP27 non-cohernet mode is unsupported */
--- a/arch/mips/include/asm/mach-ip32/dma-coherence.h
+++ b/arch/mips/include/asm/mach-ip32/dma-coherence.h
@@ -80,17 +80,6 @@ static inline int plat_dma_supported(str
return 1;
}
-static inline void plat_extra_sync_for_device(struct device *dev)
-{
- return;
-}
-
-static inline int plat_dma_mapping_error(struct device *dev,
- dma_addr_t dma_addr)
-{
- return 0;
-}
-
static inline int plat_device_is_coherent(struct device *dev)
{
return 0; /* IP32 is non-cohernet */
--- a/arch/mips/include/asm/mach-jazz/dma-coherence.h
+++ b/arch/mips/include/asm/mach-jazz/dma-coherence.h
@@ -48,16 +48,6 @@ static inline int plat_dma_supported(str
return 1;
}
-static inline void plat_extra_sync_for_device(struct device *dev)
-{
-}
-
-static inline int plat_dma_mapping_error(struct device *dev,
- dma_addr_t dma_addr)
-{
- return 0;
-}
-
static inline int plat_device_is_coherent(struct device *dev)
{
return 0;
--- a/arch/mips/include/asm/mach-loongson/dma-coherence.h
+++ b/arch/mips/include/asm/mach-loongson/dma-coherence.h
@@ -53,16 +53,6 @@ static inline int plat_dma_supported(str
return 1;
}
-static inline void plat_extra_sync_for_device(struct device *dev)
-{
-}
-
-static inline int plat_dma_mapping_error(struct device *dev,
- dma_addr_t dma_addr)
-{
- return 0;
-}
-
static inline int plat_device_is_coherent(struct device *dev)
{
return 0;
--- a/arch/mips/include/asm/mach-powertv/dma-coherence.h
+++ b/arch/mips/include/asm/mach-powertv/dma-coherence.h
@@ -99,16 +99,6 @@ static inline int plat_dma_supported(str
return 1;
}
-static inline void plat_extra_sync_for_device(struct device *dev)
-{
-}
-
-static inline int plat_dma_mapping_error(struct device *dev,
- dma_addr_t dma_addr)
-{
- return 0;
-}
-
static inline int plat_device_is_coherent(struct device *dev)
{
return 0;

661
target/linux/generic/patches-3.10/131-mips_inline_dma_ops.patch Normal file
View File

@ -0,0 +1,661 @@
From: Felix Fietkau <nbd@openwrt.org>
Subject: [PATCH 2/2] MIPS: partially inline dma ops
Several DMA ops are no-op on many platforms, and the indirection through
the mips_dma_map_ops function table is causing the compiler to emit
unnecessary code.
Inlining visibly improves network performance in my tests (on a 24Kc
based system), and also slightly reduces code size of a few drivers.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
---
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1426,6 +1426,7 @@ config CPU_CAVIUM_OCTEON
select LIBFDT
select USE_OF
select USB_EHCI_BIG_ENDIAN_MMIO
+ select SYS_HAS_DMA_OPS
help
The Cavium Octeon processor is a highly integrated chip containing
many ethernet hardware widgets for networking tasks. The processor
@@ -1646,6 +1647,9 @@ config SYS_HAS_CPU_XLR
config SYS_HAS_CPU_XLP
bool
+config SYS_HAS_DMA_OPS
+ bool
+
#
# CPU may reorder R->R, R->W, W->R, W->W
# Reordering beyond LL and SC is handled in WEAK_REORDERING_BEYOND_LLSC
--- a/arch/mips/include/asm/dma-mapping.h
+++ b/arch/mips/include/asm/dma-mapping.h
@@ -1,6 +1,12 @@
#ifndef _ASM_DMA_MAPPING_H
#define _ASM_DMA_MAPPING_H
+#include <linux/kmemcheck.h>
+#include <linux/bug.h>
+#include <linux/scatterlist.h>
+#include <linux/dma-debug.h>
+#include <linux/dma-attrs.h>
+
#include <asm/scatterlist.h>
#include <asm/dma-coherence.h>
#include <asm/cache.h>
@@ -10,14 +16,47 @@
#include <dma-coherence.h>
#endif
-extern struct dma_map_ops *mips_dma_map_ops;
+void __dma_sync(struct page *page, unsigned long offset, size_t size,
+ enum dma_data_direction direction);
+void *mips_dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp,
+ struct dma_attrs *attrs);
+void mips_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
+ dma_addr_t dma_handle, struct dma_attrs *attrs);
static inline struct dma_map_ops *get_dma_ops(struct device *dev)
{
+#ifdef CONFIG_SYS_HAS_DMA_OPS
if (dev && dev->archdata.dma_ops)
return dev->archdata.dma_ops;
else
return mips_dma_map_ops;
+#else
+ return NULL;
+#endif
+}
+
+/*
+ * Warning on the terminology - Linux calls an uncached area coherent;
+ * MIPS terminology calls memory areas with hardware maintained coherency
+ * coherent.
+ */
+
+static inline int cpu_is_noncoherent_r10000(struct device *dev)
+{
+#ifndef CONFIG_SYS_HAS_CPU_R10000
+ return 0;
+#endif
+ return !plat_device_is_coherent(dev) &&
+ (current_cpu_type() == CPU_R10000 ||
+ current_cpu_type() == CPU_R12000);
+}
+
+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);
}
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
@@ -30,12 +69,309 @@ static inline bool dma_capable(struct de
static inline void dma_mark_clean(void *addr, size_t size) {}
-#include <asm-generic/dma-mapping-common.h>
+static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
+ size_t size,
+ enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+ unsigned long offset = (unsigned long)ptr & ~PAGE_MASK;
+ struct page *page = virt_to_page(ptr);
+ dma_addr_t addr;
+
+ kmemcheck_mark_initialized(ptr, size);
+ BUG_ON(!valid_dma_direction(dir));
+ if (ops) {
+ addr = ops->map_page(dev, page, offset, size, dir, attrs);
+ } else {
+ if (!plat_device_is_coherent(dev))
+ __dma_sync(page, offset, size, dir);
+
+ addr = plat_map_dma_mem_page(dev, page) + offset;
+ }
+ debug_dma_map_page(dev, page, offset, size, dir, addr, true);
+ return addr;
+}
+
+static inline void dma_unmap_single_attrs(struct device *dev, dma_addr_t addr,
+ size_t size,
+ enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+
+ BUG_ON(!valid_dma_direction(dir));
+ if (ops) {
+ ops->unmap_page(dev, addr, size, dir, attrs);
+ } else {
+ if (cpu_is_noncoherent_r10000(dev))
+ __dma_sync(dma_addr_to_page(dev, addr),
+ addr & ~PAGE_MASK, size, dir);
+
+ plat_unmap_dma_mem(dev, addr, size, dir);
+ }
+ debug_dma_unmap_page(dev, addr, size, dir, true);
+}
+
+static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+ int i, ents;
+ struct scatterlist *s;
+
+ for_each_sg(sg, s, nents, i)
+ kmemcheck_mark_initialized(sg_virt(s), s->length);
+ BUG_ON(!valid_dma_direction(dir));
+ if (ops) {
+ ents = ops->map_sg(dev, sg, nents, dir, attrs);
+ } else {
+ for_each_sg(sg, s, nents, i) {
+ struct page *page = sg_page(s);
+
+ if (!plat_device_is_coherent(dev))
+ __dma_sync(page, s->offset, s->length, dir);
+ s->dma_address =
+ plat_map_dma_mem_page(dev, page) + s->offset;
+ }
+ ents = nents;
+ }
+ debug_dma_map_sg(dev, sg, nents, ents, dir);
+
+ return ents;
+}
+
+static inline void dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg,
+ int nents, enum dma_data_direction dir,
+ struct dma_attrs *attrs)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+ struct scatterlist *s;
+ int i;
+
+ BUG_ON(!valid_dma_direction(dir));
+ debug_dma_unmap_sg(dev, sg, nents, dir);
+ if (ops) {
+ ops->unmap_sg(dev, sg, nents, dir, attrs);
+ return;
+ }
+
+ for_each_sg(sg, s, nents, i) {
+ if (!plat_device_is_coherent(dev) && dir != DMA_TO_DEVICE)
+ __dma_sync(sg_page(s), s->offset, s->length, dir);
+ plat_unmap_dma_mem(dev, s->dma_address, s->length, dir);
+ }
+}
+
+static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
+ size_t offset, size_t size,
+ enum dma_data_direction dir)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+ dma_addr_t addr;
+
+ kmemcheck_mark_initialized(page_address(page) + offset, size);
+ BUG_ON(!valid_dma_direction(dir));
+ if (ops) {
+ addr = ops->map_page(dev, page, offset, size, dir, NULL);
+ } else {
+ if (!plat_device_is_coherent(dev))
+ __dma_sync(page, offset, size, dir);
+
+ addr = plat_map_dma_mem_page(dev, page) + offset;
+ }
+ debug_dma_map_page(dev, page, offset, size, dir, addr, false);
+
+ return addr;
+}
+
+static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
+ size_t size, enum dma_data_direction dir)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+
+ BUG_ON(!valid_dma_direction(dir));
+ if (ops) {
+ ops->unmap_page(dev, addr, size, dir, NULL);
+ } else {
+ if (cpu_is_noncoherent_r10000(dev))
+ __dma_sync(dma_addr_to_page(dev, addr),
+ addr & ~PAGE_MASK, size, dir);
+
+ plat_unmap_dma_mem(dev, addr, size, dir);
+ }
+ debug_dma_unmap_page(dev, addr, size, dir, false);
+}
+
+static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t addr,
+ size_t size,
+ enum dma_data_direction dir)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+
+ BUG_ON(!valid_dma_direction(dir));
+ if (ops)
+ ops->sync_single_for_cpu(dev, addr, size, dir);
+ else if (cpu_is_noncoherent_r10000(dev))
+ __dma_sync(dma_addr_to_page(dev, addr),
+ addr & ~PAGE_MASK, size, dir);
+ debug_dma_sync_single_for_cpu(dev, addr, size, dir);
+}
+
+static inline void dma_sync_single_for_device(struct device *dev,
+ dma_addr_t addr, size_t size,
+ enum dma_data_direction dir)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+
+ BUG_ON(!valid_dma_direction(dir));
+ if (ops)
+ ops->sync_single_for_device(dev, addr, size, dir);
+ else if (!plat_device_is_coherent(dev))
+ __dma_sync(dma_addr_to_page(dev, addr),
+ addr & ~PAGE_MASK, size, dir);
+ debug_dma_sync_single_for_device(dev, addr, size, dir);
+}
+
+static inline void dma_sync_single_range_for_cpu(struct device *dev,
+ dma_addr_t addr,
+ unsigned long offset,
+ size_t size,
+ enum dma_data_direction dir)
+{
+ const struct dma_map_ops *ops = get_dma_ops(dev);
+
+ BUG_ON(!valid_dma_direction(dir));
+ if (ops)
+ ops->sync_single_for_cpu(dev, addr + offset, size, dir);
+ else if (cpu_is_noncoherent_r10000(dev))
+ __dma_sync(dma_addr_to_page(dev, addr + offset),
+ (addr + offset) & ~PAGE_MASK, size, dir);
+ debug_dma_sync_single_range_for_cpu(dev, addr, offset, size, dir);
+}
+
+static inline void dma_sync_single_range_for_device(struct device *dev,
+ dma_addr_t addr,
+ unsigned long offset,
+ size_t size,
+ enum dma_data_direction dir)
+{
+ const struct dma_map_ops *ops = get_dma_ops(dev);
+
+ BUG_ON(!valid_dma_direction(dir));
+ if (ops)
+ ops->sync_single_for_device(dev, addr + offset, size, dir);
+ else if (!plat_device_is_coherent(dev))
+ __dma_sync(dma_addr_to_page(dev, addr + offset),
+ (addr + offset) & ~PAGE_MASK, size, dir);
+ debug_dma_sync_single_range_for_device(dev, addr, offset, size, dir);
+}
+
+static inline void
+dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
+ int nelems, enum dma_data_direction dir)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+ struct scatterlist *s;
+ int i;
+
+ BUG_ON(!valid_dma_direction(dir));
+ if (ops)
+ ops->sync_sg_for_cpu(dev, sg, nelems, dir);
+ else if (cpu_is_noncoherent_r10000(dev)) {
+ for_each_sg(sg, s, nelems, i)
+ __dma_sync(sg_page(s), s->offset, s->length, dir);
+ }
+ debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir);
+}
+
+static inline void
+dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
+ int nelems, enum dma_data_direction dir)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+ struct scatterlist *s;
+ int i;
+
+ BUG_ON(!valid_dma_direction(dir));
+ if (ops)
+ ops->sync_sg_for_device(dev, sg, nelems, dir);
+ else if (!plat_device_is_coherent(dev)) {
+ for_each_sg(sg, s, nelems, i)
+ __dma_sync(sg_page(s), s->offset, s->length, dir);
+ }
+ debug_dma_sync_sg_for_device(dev, sg, nelems, dir);
+
+}
+
+#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
+#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
+#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
+#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
+
+extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
+ void *cpu_addr, dma_addr_t dma_addr, size_t size);
+
+/**
+ * dma_mmap_attrs - map a coherent DMA allocation into user space
+ * @dev: valid struct device pointer, or NULL for ISA and EISA-like devices
+ * @vma: vm_area_struct describing requested user mapping
+ * @cpu_addr: kernel CPU-view address returned from dma_alloc_attrs
+ * @handle: device-view address returned from dma_alloc_attrs
+ * @size: size of memory originally requested in dma_alloc_attrs
+ * @attrs: attributes of mapping properties requested in dma_alloc_attrs
+ *
+ * Map a coherent DMA buffer previously allocated by dma_alloc_attrs
+ * into user space. The coherent DMA buffer must not be freed by the
+ * driver until the user space mapping has been released.
+ */
+static inline int
+dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma, void *cpu_addr,
+ dma_addr_t dma_addr, size_t size, struct dma_attrs *attrs)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+ BUG_ON(!ops);
+ if (ops && ops->mmap)
+ return ops->mmap(dev, vma, cpu_addr, dma_addr, size, attrs);
+ return dma_common_mmap(dev, vma, cpu_addr, dma_addr, size);
+}
+
+#define dma_mmap_coherent(d, v, c, h, s) dma_mmap_attrs(d, v, c, h, s, NULL)
+
+static inline int dma_mmap_writecombine(struct device *dev, struct vm_area_struct *vma,
+ void *cpu_addr, dma_addr_t dma_addr, size_t size)
+{
+ DEFINE_DMA_ATTRS(attrs);
+ dma_set_attr(DMA_ATTR_WRITE_COMBINE, &attrs);
+ return dma_mmap_attrs(dev, vma, cpu_addr, dma_addr, size, &attrs);
+}
+
+int
+dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
+ void *cpu_addr, dma_addr_t dma_addr, size_t size);
+
+static inline int
+dma_get_sgtable_attrs(struct device *dev, struct sg_table *sgt, void *cpu_addr,
+ dma_addr_t dma_addr, size_t size, struct dma_attrs *attrs)
+{
+ struct dma_map_ops *ops = get_dma_ops(dev);
+ BUG_ON(!ops);
+ if (ops && ops->get_sgtable)
+ return ops->get_sgtable(dev, sgt, cpu_addr, dma_addr, size,
+ attrs);
+ return dma_common_get_sgtable(dev, sgt, cpu_addr, dma_addr, size);
+}
+
+#define dma_get_sgtable(d, t, v, h, s) dma_get_sgtable_attrs(d, t, v, h, s, NULL)
+
static inline int dma_supported(struct device *dev, u64 mask)
{
struct dma_map_ops *ops = get_dma_ops(dev);
- return ops->dma_supported(dev, mask);
+ if (ops)
+ return ops->dma_supported(dev, mask);
+ return plat_dma_supported(dev, mask);
}
static inline int dma_mapping_error(struct device *dev, u64 mask)
@@ -43,7 +379,9 @@ static inline int dma_mapping_error(stru
struct dma_map_ops *ops = get_dma_ops(dev);
debug_dma_mapping_error(dev, mask);
- return ops->mapping_error(dev, mask);
+ if (ops)
+ return ops->mapping_error(dev, mask);
+ return 0;
}
static inline int
@@ -69,7 +407,11 @@ static inline void *dma_alloc_attrs(stru
void *ret;
struct dma_map_ops *ops = get_dma_ops(dev);
- ret = ops->alloc(dev, size, dma_handle, gfp, attrs);
+ if (ops)
+ ret = ops->alloc(dev, size, dma_handle, gfp, attrs);
+ else
+ ret = mips_dma_alloc_coherent(dev, size, dma_handle, gfp,
+ attrs);
debug_dma_alloc_coherent(dev, size, *dma_handle, ret);
@@ -84,7 +426,10 @@ static inline void dma_free_attrs(struct
{
struct dma_map_ops *ops = get_dma_ops(dev);
- ops->free(dev, size, vaddr, dma_handle, attrs);
+ if (ops)
+ ops->free(dev, size, vaddr, dma_handle, attrs);
+ else
+ mips_dma_free_coherent(dev, size, vaddr, dma_handle, attrs);
debug_dma_free_coherent(dev, size, vaddr, dma_handle);
}
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -42,26 +42,6 @@ static int __init setnocoherentio(char *
}
early_param("nocoherentio", setnocoherentio);
-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);
-}
-
-/*
- * Warning on the terminology - Linux calls an uncached area coherent;
- * MIPS terminology calls memory areas with hardware maintained coherency
- * coherent.
- */
-
-static inline int cpu_is_noncoherent_r10000(struct device *dev)
-{
- return !plat_device_is_coherent(dev) &&
- (current_cpu_type() == CPU_R10000 ||
- current_cpu_type() == CPU_R12000);
-}
-
static gfp_t massage_gfp_flags(const struct device *dev, gfp_t gfp)
{
gfp_t dma_flag;
@@ -117,8 +97,9 @@ void *dma_alloc_noncoherent(struct devic
}
EXPORT_SYMBOL(dma_alloc_noncoherent);
-static void *mips_dma_alloc_coherent(struct device *dev, size_t size,
- dma_addr_t * dma_handle, gfp_t gfp, struct dma_attrs *attrs)
+void *mips_dma_alloc_coherent(struct device *dev, size_t size,
+ dma_addr_t *dma_handle, gfp_t gfp,
+ struct dma_attrs *attrs)
{
void *ret;
@@ -142,6 +123,7 @@ static void *mips_dma_alloc_coherent(str
return ret;
}
+EXPORT_SYMBOL(mips_dma_alloc_coherent);
void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
@@ -152,8 +134,8 @@ void dma_free_noncoherent(struct device
}
EXPORT_SYMBOL(dma_free_noncoherent);
-static void mips_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_handle, struct dma_attrs *attrs)
+void mips_dma_free_coherent(struct device *dev, size_t size, void *vaddr,
+ dma_addr_t dma_handle, struct dma_attrs *attrs)
{
unsigned long addr = (unsigned long) vaddr;
int order = get_order(size);
@@ -168,6 +150,7 @@ static void mips_dma_free_coherent(struc
free_pages(addr, get_order(size));
}
+EXPORT_SYMBOL(mips_dma_free_coherent);
static inline void __dma_sync_virtual(void *addr, size_t size,
enum dma_data_direction direction)
@@ -196,8 +179,8 @@ static inline void __dma_sync_virtual(vo
* 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)
+void __dma_sync(struct page *page, unsigned long offset, size_t size,
+ enum dma_data_direction direction)
{
size_t left = size;
@@ -226,109 +209,7 @@ static inline void __dma_sync(struct pag
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, struct dma_attrs *attrs)
-{
- if (cpu_is_noncoherent_r10000(dev))
- __dma_sync(dma_addr_to_page(dev, dma_addr),
- dma_addr & ~PAGE_MASK, size, direction);
-
- plat_unmap_dma_mem(dev, dma_addr, size, direction);
-}
-
-static int mips_dma_map_sg(struct device *dev, struct scatterlist *sg,
- int nents, enum dma_data_direction direction, struct dma_attrs *attrs)
-{
- int i;
-
- for (i = 0; i < nents; i++, sg++) {
- if (!plat_device_is_coherent(dev))
- __dma_sync(sg_page(sg), sg->offset, sg->length,
- direction);
- 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,
- struct dma_attrs *attrs)
-{
- if (!plat_device_is_coherent(dev))
- __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 *sg,
- int nhwentries, enum dma_data_direction direction,
- struct dma_attrs *attrs)
-{
- int i;
-
- for (i = 0; i < nhwentries; i++, sg++) {
- if (!plat_device_is_coherent(dev) &&
- 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_is_noncoherent_r10000(dev))
- __dma_sync(dma_addr_to_page(dev, dma_handle),
- dma_handle & ~PAGE_MASK, size, direction);
-}
-
-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 *sg, int nelems, enum dma_data_direction direction)
-{
- int i;
-
- /* Make sure that gcc doesn't leave the empty loop body. */
- for (i = 0; i < nelems; i++, sg++) {
- if (cpu_is_noncoherent_r10000(dev))
- __dma_sync(sg_page(sg), sg->offset, sg->length,
- direction);
- }
-}
-
-static void mips_dma_sync_sg_for_device(struct device *dev,
- struct scatterlist *sg, int nelems, enum dma_data_direction direction)
-{
- int i;
-
- /* Make sure that gcc doesn't leave the empty loop body. */
- for (i = 0; i < nelems; i++, sg++) {
- if (!plat_device_is_coherent(dev))
- __dma_sync(sg_page(sg), sg->offset, sg->length,
- direction);
- }
-}
-
-int mips_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
- return 0;
-}
-
-int mips_dma_supported(struct device *dev, u64 mask)
-{
- return plat_dma_supported(dev, mask);
-}
+EXPORT_SYMBOL(__dma_sync);
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
@@ -341,23 +222,10 @@ void dma_cache_sync(struct device *dev,
EXPORT_SYMBOL(dma_cache_sync);
-static struct dma_map_ops mips_default_dma_map_ops = {
- .alloc = mips_dma_alloc_coherent,
- .free = mips_dma_free_coherent,
- .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,
- .mapping_error = mips_dma_mapping_error,
- .dma_supported = mips_dma_supported
-};
-
-struct dma_map_ops *mips_dma_map_ops = &mips_default_dma_map_ops;
+#ifdef CONFIG_SYS_HAS_DMA_OPS
+struct dma_map_ops *mips_dma_map_ops = NULL;
EXPORT_SYMBOL(mips_dma_map_ops);
+#endif
#define PREALLOC_DMA_DEBUG_ENTRIES (1 << 16)

2
target/linux/generic/patches-3.10/300-mips_expose_boot_raw.patch
View File

@ -18,7 +18,7 @@ Acked-by: Rob Landley <rob@landley.net>
config CEVT_BCM1480
bool
@@ -2387,6 +2384,18 @@ config USE_OF
@@ -2391,6 +2388,18 @@ config USE_OF
select OF_EARLY_FLATTREE
select IRQ_DOMAIN