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rk: ion: support High Memory for CMA

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This commit is contained in:
CMY
2014-05-07 15:07:42 +08:00
parent 3c511f4f49
commit bf46fdf5df
2 changed files with 48 additions and 2 deletions
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20
arch/arm/mm/dma-mapping.c Normal file → Executable file
View File

@@ -587,7 +587,12 @@ static void *__alloc_from_contiguous(struct device *dev, size_t size,
static void __free_from_contiguous(struct device *dev, struct page *page,
void *cpu_addr, size_t size)
{
#ifdef CONFIG_ARCH_ROCKCHIP
#define ION_CMA_UNMAPED 0x1
if (PageHighMem(page) && (cpu_addr!=(void*)ION_CMA_UNMAPED))
#else
if (PageHighMem(page))
#endif
__dma_free_remap(cpu_addr, size);
else
__dma_remap(page, size, pgprot_kernel);
@@ -698,6 +703,21 @@ void *arm_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
__builtin_return_address(0));
}
#ifdef CONFIG_ARCH_ROCKCHIP
void *arm_dma_alloc_remap(struct page *page, size_t size)
{
pgprot_t prot = __get_dma_pgprot(NULL, pgprot_kernel);
return __dma_alloc_remap(page, size, GFP_KERNEL, prot,
__builtin_return_address(0));
}
void arm_dma_free_remap(void *cpu_addr, size_t size)
{
__dma_free_remap(cpu_addr, size);
}
#endif
static void *arm_coherent_dma_alloc(struct device *dev, size_t size,
dma_addr_t *handle, gfp_t gfp, struct dma_attrs *attrs)
{

30
drivers/staging/android/ion/ion_cma_heap.c
View File

@@ -28,6 +28,7 @@
#include "ion_priv.h"
#define ION_CMA_ALLOCATE_FAILED -1
#define ION_CMA_UNMAPED 0x1
struct ion_cma_heap {
struct ion_heap heap;
@@ -51,7 +52,7 @@ struct ion_cma_buffer_info {
static int ion_cma_get_sgtable(struct device *dev, struct sg_table *sgt,
void *cpu_addr, dma_addr_t handle, size_t size)
{
struct page *page = virt_to_page(cpu_addr);
struct page *page = phys_to_page(handle);
int ret;
ret = sg_alloc_table(sgt, 1, GFP_KERNEL);
@@ -62,6 +63,9 @@ static int ion_cma_get_sgtable(struct device *dev, struct sg_table *sgt,
return 0;
}
void arm_dma_free_remap(void *cpu_addr, size_t size);
void * arm_dma_alloc_remap(struct page *page, size_t size);
/* ION CMA heap operations functions */
static int ion_cma_allocate(struct ion_heap *heap, struct ion_buffer *buffer,
unsigned long len, unsigned long align,
@@ -111,6 +115,10 @@ static int ion_cma_allocate(struct ion_heap *heap, struct ion_buffer *buffer,
goto free_table;
/* keep this for memory release */
buffer->priv_virt = info;
if (PageHighMem(phys_to_page(info->handle))) {
arm_dma_free_remap(info->cpu_addr, len);
info->cpu_addr = (void*)ION_CMA_UNMAPED;
}
dev_dbg(dev, "Allocate buffer %p\n", buffer);
return 0;
@@ -191,12 +199,30 @@ static void *ion_cma_map_kernel(struct ion_heap *heap,
{
struct ion_cma_buffer_info *info = buffer->priv_virt;
/* kernel memory mapping has been done at allocation time */
return info->cpu_addr;
if (PageHighMem(phys_to_page(info->handle))) {
if (info->cpu_addr==(void*)ION_CMA_UNMAPED) {
info->cpu_addr = arm_dma_alloc_remap(phys_to_page(info->handle),
buffer->size);
if (!info->cpu_addr)
info->cpu_addr = (void*)ION_CMA_UNMAPED;
pr_debug("map addr: %x -> %x\n", info->handle,
(unsigned int)info->cpu_addr);
}
}
return (info->cpu_addr==(void*)ION_CMA_UNMAPED)?0:info->cpu_addr;
}
static void ion_cma_unmap_kernel(struct ion_heap *heap,
struct ion_buffer *buffer)
{
struct ion_cma_buffer_info *info = buffer->priv_virt;
if (PageHighMem(phys_to_page(info->handle))) {
struct ion_cma_buffer_info *info = buffer->priv_virt;
if (info->cpu_addr!=(void*)ION_CMA_UNMAPED) {
arm_dma_free_remap(info->cpu_addr, buffer->size);
info->cpu_addr = (void*)ION_CMA_UNMAPED;
}
}
}
int ion_cma_cache_ops(struct ion_heap *heap,