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codec_mm: add the flush cache away for the highmem [1/1]

Browse Source 
PD#SWPL-3588

Problem:
bad using virt_to_pfn in stream_input ko

Solution:
add the flush cache away for the highmem.

Verify:
p212

Change-Id: I70fd18f97b5b91c9154b7eeb9f488d16113daf8d
Signed-off-by: Nanxin Qin <nanxin.qin@amlogic.com>
This commit is contained in:
Nanxin Qin
2018-12-26 19:29:18 +08:00
committed by Tao Zeng
parent 2afb3d7ce4
commit 2f92c8f8b6
1 changed files with 37 additions and 0 deletions
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37
drivers/amlogic/media/common/codec_mm/codec_mm.c
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@@ -270,6 +270,31 @@ static int codec_mm_alloc_pre_check_in(
return have_space;
}
static ulong codec_mm_search_phy_addr(char *vaddr)
{
struct codec_mm_mgt_s *mgt = get_mem_mgt();
struct codec_mm_s *mem = NULL;
ulong phy_addr = 0;
unsigned long flags;
spin_lock_irqsave(&mgt->lock, flags);
list_for_each_entry(mem, &mgt->mem_list, list) {
if (vaddr - mem->vbuffer >= 0 &&
vaddr - mem->vbuffer < mem->buffer_size) {
if (mem->phy_addr)
phy_addr = mem->phy_addr +
(vaddr - mem->vbuffer);
break;
}
}
spin_unlock_irqrestore(&mgt->lock, flags);
return phy_addr;
}
static void *codec_mm_search_vaddr(unsigned long phy_addr)
{
struct codec_mm_mgt_s *mgt = get_mem_mgt();
@@ -841,7 +866,19 @@ void codec_mm_dma_flush(void *vaddr,
{
struct codec_mm_mgt_s *mgt = get_mem_mgt();
dma_addr_t dma_addr;
ulong phy_addr;
if (is_vmalloc_or_module_addr(vaddr)) {
phy_addr = codec_mm_search_phy_addr(vaddr);
if (!phy_addr)
phy_addr = page_to_phys(vmalloc_to_page(vaddr))
+ offset_in_page(vaddr);
if (phy_addr && PageHighMem(phys_to_page(phy_addr)))
flush_cache_vunmap(phy_addr, phy_addr + size);
return;
}
/* only apply to the lowmem. */
dma_addr = dma_map_single(mgt->dev, vaddr, size, dir);
if (dma_addr)
dma_unmap_single(mgt->dev, dma_addr, size, dir);