Commit 9a88cbb5 authored by Ralf Baechle's avatar Ralf Baechle
Browse files

[MIPS] Unify dma-{coherent,noncoherent.ip27,ip32}



Platforms will now have to supply a function dma_device_is_coherent which
returns if a particular device participates in the coherence domain.  For
most platforms this function will always return 0 or 1.
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent f65e4fa8
......@@ -598,8 +598,6 @@ config SGI_IP32
select ARC
select ARC32
select BOOT_ELF32
select OWN_DMA
select DMA_IP32
select DMA_NONCOHERENT
select HW_HAS_PCI
select R5000_CPU_SCACHE
......@@ -883,9 +881,6 @@ config DMA_NONCOHERENT
config DMA_NEED_PCI_MAP_STATE
bool
config OWN_DMA
bool
config EARLY_PRINTK
bool
......
......@@ -2,8 +2,8 @@
# Makefile for the Linux/MIPS-specific parts of the memory manager.
#
obj-y += cache.o extable.o fault.o init.o pgtable.o \
tlbex.o tlbex-fault.o
obj-y += cache.o dma-default.o extable.o fault.o \
init.o pgtable.o tlbex.o tlbex-fault.o
obj-$(CONFIG_32BIT) += ioremap.o pgtable-32.o
obj-$(CONFIG_64BIT) += pgtable-64.o
......@@ -32,14 +32,4 @@ obj-$(CONFIG_R5000_CPU_SCACHE) += sc-r5k.o
obj-$(CONFIG_RM7000_CPU_SCACHE) += sc-rm7k.o
obj-$(CONFIG_MIPS_CPU_SCACHE) += sc-mips.o
#
# Choose one DMA coherency model
#
ifndef CONFIG_OWN_DMA
obj-$(CONFIG_DMA_COHERENT) += dma-coherent.o
obj-$(CONFIG_DMA_NONCOHERENT) += dma-noncoherent.o
endif
obj-$(CONFIG_DMA_IP27) += dma-ip27.o
obj-$(CONFIG_DMA_IP32) += dma-ip32.o
EXTRA_AFLAGS := $(CFLAGS)
/*
* 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@unixbox.com>
* Copyright (C) 2000, 2001 Ralf Baechle <ralf@gnu.org>
* 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/module.h>
#include <linux/string.h>
#include <asm/cache.h>
#include <asm/io.h>
void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t * dma_handle, gfp_t gfp)
{
void *ret;
/* ignore region specifiers */
gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
gfp |= GFP_DMA;
ret = (void *) __get_free_pages(gfp, get_order(size));
if (ret != NULL) {
memset(ret, 0, size);
*dma_handle = virt_to_phys(ret);
}
return ret;
}
EXPORT_SYMBOL(dma_alloc_noncoherent);
void *dma_alloc_coherent(struct device *dev, size_t size,
dma_addr_t * dma_handle, gfp_t gfp)
__attribute__((alias("dma_alloc_noncoherent")));
EXPORT_SYMBOL(dma_alloc_coherent);
void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle)
{
unsigned long addr = (unsigned long) vaddr;
free_pages(addr, get_order(size));
}
EXPORT_SYMBOL(dma_free_noncoherent);
void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
dma_addr_t dma_handle) __attribute__((alias("dma_free_noncoherent")));
EXPORT_SYMBOL(dma_free_coherent);
dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
return __pa(ptr);
}
EXPORT_SYMBOL(dma_map_single);
void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_unmap_single);
int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction direction)
{
int i;
BUG_ON(direction == DMA_NONE);
for (i = 0; i < nents; i++, sg++) {
sg->dma_address = (dma_addr_t)page_to_phys(sg->page) + sg->offset;
}
return nents;
}
EXPORT_SYMBOL(dma_map_sg);
dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
return page_to_phys(page) + offset;
}
EXPORT_SYMBOL(dma_map_page);
void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_unmap_page);
void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_unmap_sg);
void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_sync_single_for_cpu);
void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_sync_single_for_device);
void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_sync_single_range_for_device);
void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_sync_sg_for_cpu);
void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_sync_sg_for_device);
int dma_mapping_error(dma_addr_t dma_addr)
{
return 0;
}
EXPORT_SYMBOL(dma_mapping_error);
int 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 < 0x00ffffff)
return 0;
return 1;
}
EXPORT_SYMBOL(dma_supported);
int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
{
return 1;
}
EXPORT_SYMBOL(dma_is_consistent);
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
{
BUG_ON(direction == DMA_NONE);
}
EXPORT_SYMBOL(dma_cache_sync);
/* The DAC routines are a PCIism.. */
#ifdef CONFIG_PCI
#include <linux/pci.h>
dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev,
struct page *page, unsigned long offset, int direction)
{
return (dma64_addr_t)page_to_phys(page) + offset;
}
EXPORT_SYMBOL(pci_dac_page_to_dma);
struct page *pci_dac_dma_to_page(struct pci_dev *pdev,
dma64_addr_t dma_addr)
{
return mem_map + (dma_addr >> PAGE_SHIFT);
}
EXPORT_SYMBOL(pci_dac_dma_to_page);
unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev,
dma64_addr_t dma_addr)
{
return dma_addr & ~PAGE_MASK;
}
EXPORT_SYMBOL(pci_dac_dma_to_offset);
void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev,
dma64_addr_t dma_addr, size_t len, int direction)
{
BUG_ON(direction == PCI_DMA_NONE);
}
EXPORT_SYMBOL(pci_dac_dma_sync_single_for_cpu);
void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev,
dma64_addr_t dma_addr, size_t len, int direction)
{
BUG_ON(direction == PCI_DMA_NONE);
}
EXPORT_SYMBOL(pci_dac_dma_sync_single_for_device);
#endif /* CONFIG_PCI */
......@@ -4,28 +4,39 @@
* for more details.
*
* Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com>
* Copyright (C) 2000, 2001 Ralf Baechle <ralf@gnu.org>
* Copyright (C) 2000, 2001, 06 Ralf Baechle <ralf@linux-mips.org>
* 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/module.h>
#include <linux/string.h>
#include <linux/dma-mapping.h>
#include <asm/cache.h>
#include <asm/io.h>
#include <dma-coherence.h>
/*
* 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_data.cputype == CPU_R10000 &&
current_cpu_data.cputype == CPU_R12000);
}
void *dma_alloc_noncoherent(struct device *dev, size_t size,
dma_addr_t * dma_handle, gfp_t gfp)
{
void *ret;
/* ignore region specifiers */
gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
......@@ -35,7 +46,7 @@ void *dma_alloc_noncoherent(struct device *dev, size_t size,
if (ret != NULL) {
memset(ret, 0, size);
*dma_handle = virt_to_phys(ret);
*dma_handle = plat_map_dma_mem(dev, ret, size);
}
return ret;
......@@ -48,10 +59,21 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
{
void *ret;
ret = dma_alloc_noncoherent(dev, size, dma_handle, gfp);
/* ignore region specifiers */
gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff))
gfp |= GFP_DMA;
ret = (void *) __get_free_pages(gfp, get_order(size));
if (ret) {
dma_cache_wback_inv((unsigned long) ret, size);
ret = UNCAC_ADDR(ret);
memset(ret, 0, size);
*dma_handle = plat_map_dma_mem(dev, ret, size);
if (!plat_device_is_coherent(dev)) {
dma_cache_wback_inv((unsigned long) ret, size);
ret = UNCAC_ADDR(ret);
}
}
return ret;
......@@ -72,7 +94,9 @@ void dma_free_coherent(struct device *dev, size_t size, void *vaddr,
{
unsigned long addr = (unsigned long) vaddr;
addr = CAC_ADDR(addr);
if (!plat_device_is_coherent(dev))
addr = CAC_ADDR(addr);
free_pages(addr, get_order(size));
}
......@@ -104,9 +128,10 @@ dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
{
unsigned long addr = (unsigned long) ptr;
__dma_sync(addr, size, direction);
if (!plat_device_is_coherent(dev))
__dma_sync(addr, size, direction);
return virt_to_phys(ptr);
return plat_map_dma_mem(dev, ptr, size);
}
EXPORT_SYMBOL(dma_map_single);
......@@ -114,10 +139,11 @@ EXPORT_SYMBOL(dma_map_single);
void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction direction)
{
unsigned long addr;
addr = dma_addr + PAGE_OFFSET;
if (cpu_is_noncoherent_r10000(dev))
__dma_sync(plat_dma_addr_to_phys(dma_addr) + PAGE_OFFSET, size,
direction);
//__dma_sync(addr, size, direction);
plat_unmap_dma_mem(dma_addr);
}
EXPORT_SYMBOL(dma_unmap_single);
......@@ -133,11 +159,10 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
unsigned long addr;
addr = (unsigned long) page_address(sg->page);
if (addr) {
if (!plat_device_is_coherent(dev) && addr)
__dma_sync(addr + sg->offset, sg->length, direction);
sg->dma_address = (dma_addr_t)page_to_phys(sg->page)
+ sg->offset;
}
sg->dma_address = plat_map_dma_mem_page(dev, sg->page) +
sg->offset;
}
return nents;
......@@ -148,14 +173,16 @@ EXPORT_SYMBOL(dma_map_sg);
dma_addr_t dma_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction direction)
{
unsigned long addr;
BUG_ON(direction == DMA_NONE);
addr = (unsigned long) page_address(page) + offset;
dma_cache_wback_inv(addr, size);
if (!plat_device_is_coherent(dev)) {
unsigned long addr;
addr = (unsigned long) page_address(page) + offset;
dma_cache_wback_inv(addr, size);
}
return page_to_phys(page) + offset;
return plat_map_dma_mem_page(dev, page) + offset;
}
EXPORT_SYMBOL(dma_map_page);
......@@ -165,12 +192,14 @@ void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
{
BUG_ON(direction == DMA_NONE);
if (direction != DMA_TO_DEVICE) {
if (!plat_device_is_coherent(dev) && direction != DMA_TO_DEVICE) {
unsigned long addr;
addr = dma_address + PAGE_OFFSET;
addr = plat_dma_addr_to_phys(dma_address);
dma_cache_wback_inv(addr, size);
}
plat_unmap_dma_mem(dma_address);
}
EXPORT_SYMBOL(dma_unmap_page);
......@@ -183,13 +212,15 @@ void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
BUG_ON(direction == DMA_NONE);
if (direction == DMA_TO_DEVICE)
return;
for (i = 0; i < nhwentries; i++, sg++) {
addr = (unsigned long) page_address(sg->page);
if (addr)
__dma_sync(addr + sg->offset, sg->length, direction);
if (!plat_device_is_coherent(dev) &&
direction != DMA_TO_DEVICE) {
addr = (unsigned long) page_address(sg->page);
if (addr)
__dma_sync(addr + sg->offset, sg->length,
direction);
}
plat_unmap_dma_mem(sg->dma_address);
}
}
......@@ -198,12 +229,14 @@ EXPORT_SYMBOL(dma_unmap_sg);
void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction direction)
{
unsigned long addr;
BUG_ON(direction == DMA_NONE);
addr = dma_handle + PAGE_OFFSET;
__dma_sync(addr, size, direction);
if (cpu_is_noncoherent_r10000(dev)) {
unsigned long addr;
addr = PAGE_OFFSET + plat_dma_addr_to_phys(dma_handle);
__dma_sync(addr, size, direction);
}
}
EXPORT_SYMBOL(dma_sync_single_for_cpu);
......@@ -211,12 +244,14 @@ EXPORT_SYMBOL(dma_sync_single_for_cpu);
void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction direction)
{
unsigned long addr;
BUG_ON(direction == DMA_NONE);
addr = dma_handle + PAGE_OFFSET;
__dma_sync(addr, size, direction);
if (cpu_is_noncoherent_r10000(dev)) {
unsigned long addr;
addr = plat_dma_addr_to_phys(dma_handle);
__dma_sync(addr, size, direction);
}
}
EXPORT_SYMBOL(dma_sync_single_for_device);
......@@ -224,12 +259,14 @@ EXPORT_SYMBOL(dma_sync_single_for_device);
void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size, enum dma_data_direction direction)
{
unsigned long addr;
BUG_ON(direction == DMA_NONE);
addr = dma_handle + offset + PAGE_OFFSET;
__dma_sync(addr, size, direction);
if (cpu_is_noncoherent_r10000(dev)) {
unsigned long addr;
addr = PAGE_OFFSET + plat_dma_addr_to_phys(dma_handle);
__dma_sync(addr + offset, size, direction);
}
}
EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
......@@ -237,12 +274,14 @@ EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size, enum dma_data_direction direction)
{
unsigned long addr;
BUG_ON(direction == DMA_NONE);
addr = dma_handle + offset + PAGE_OFFSET;
__dma_sync(addr, size, direction);
if (cpu_is_noncoherent_r10000(dev)) {
unsigned long addr;
addr = PAGE_OFFSET + plat_dma_addr_to_phys(dma_handle);
__dma_sync(addr + offset, size, direction);
}
}
EXPORT_SYMBOL(dma_sync_single_range_for_device);
......@@ -255,9 +294,12 @@ void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
BUG_ON(direction == DMA_NONE);
/* Make sure that gcc doesn't leave the empty loop body. */
for (i = 0; i < nelems; i++, sg++)
__dma_sync((unsigned long)page_address(sg->page),
sg->length, direction);
for (i = 0; i < nelems; i++, sg++) {
if (!plat_device_is_coherent(dev))
__dma_sync((unsigned long)page_address(sg->page),
sg->length, direction);
plat_unmap_dma_mem(sg->dma_address);
}
}
EXPORT_SYMBOL(dma_sync_sg_for_cpu);
......@@ -270,9 +312,12 @@ void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nele
BUG_ON(direction == DMA_NONE);
/* Make sure that gcc doesn't leave the empty loop body. */
for (i = 0; i < nelems; i++, sg++)
__dma_sync((unsigned long)page_address(sg->page),
sg->length, direction);
for (i = 0; i < nelems; i++, sg++) {
if (!plat_device_is_coherent(dev))
__dma_sync((unsigned long)page_address(sg->page),
sg->length, direction);
plat_unmap_dma_mem(sg->dma_address);
}
}
EXPORT_SYMBOL(dma_sync_sg_for_device);
......@@ -301,70 +346,18 @@ EXPORT_SYMBOL(dma_supported);
int dma_is_consistent(struct device *dev, dma_addr_t dma_addr)
{
return 1;
return plat_device_is_coherent(dev);
}
EXPORT_SYMBOL(dma_is_consistent);
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction)
enum dma_data_direction direction)
{
if (direction == DMA_NONE)
return;
BUG_ON(direction == DMA_NONE);
dma_cache_wback_inv((unsigned long)vaddr, size);
if (!plat_device_is_coherent(dev))
dma_cache_wback_inv((unsigned long)vaddr, size);
}
EXPORT_SYMBOL(dma_cache_sync);
/* The DAC routines are a PCIism.. */
#ifdef CONFIG_PCI
#include <linux/pci.h>