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cns3xxx: fix missing and incomplete cache flushes on DMA cache sync for cpu - fixes some issues with ath9k

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SVN-Revision: 26797
This commit is contained in:
Felix Fietkau 2011-05-01 15:53:56 +00:00
parent ebcc60cf35
commit f9a92812cf
2 changed files with 88 additions and 0 deletions
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21
target/linux/cns3xxx/patches-2.6.31/300-flush_cache_on_dma_cache_sync_for_cpu.patch Normal file
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@ -0,0 +1,21 @@
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -350,7 +350,8 @@ static inline dma_addr_t dma_map_page(st
static inline void dma_unmap_single(struct device *dev, dma_addr_t handle,
size_t size, enum dma_data_direction dir)
{
- /* nothing to do */
+ if (dir != DMA_TO_DEVICE)
+ dma_cache_maint(dma_to_virt(dev, handle), size, DMA_FROM_DEVICE);
}
#endif /* CONFIG_DMABOUNCE */
@@ -398,6 +399,8 @@ static inline void dma_sync_single_range
{
BUG_ON(!valid_dma_direction(dir));
+ if (dir != DMA_TO_DEVICE)
+ dma_cache_maint(dma_to_virt(dev, handle) + offset, size, DMA_FROM_DEVICE);
dmabounce_sync_for_cpu(dev, handle, offset, size, dir);
}

67
target/linux/cns3xxx/patches-2.6.31/301-dma_cache_ownership_maint.patch Normal file
View file

@ -0,0 +1,67 @@
--- a/arch/arm/mm/cache-v6.S
+++ b/arch/arm/mm/cache-v6.S
@@ -179,6 +179,10 @@ ENTRY(v6_flush_kern_dcache_page)
* - end - virtual end address of region
*/
ENTRY(v6_dma_inv_range)
+#ifdef CONFIG_SMP
+ ldrb r2, [r0]
+ strb r2, [r0]
+#endif
tst r0, #D_CACHE_LINE_SIZE - 1
bic r0, r0, #D_CACHE_LINE_SIZE - 1
#ifdef HARVARD_CACHE
@@ -187,6 +191,10 @@ ENTRY(v6_dma_inv_range)
mcrne p15, 0, r0, c7, c11, 1 @ clean unified line
#endif
tst r1, #D_CACHE_LINE_SIZE - 1
+#ifdef CONFIG_SMP
+ ldrneb r2, [r1, #-1]
+ strneb r2, [r1, #-1]
+#endif
bic r1, r1, #D_CACHE_LINE_SIZE - 1
#ifdef HARVARD_CACHE
mcrne p15, 0, r1, c7, c14, 1 @ clean & invalidate D line
@@ -201,6 +209,10 @@ ENTRY(v6_dma_inv_range)
#endif
add r0, r0, #D_CACHE_LINE_SIZE
cmp r0, r1
+#ifdef CONFIG_SMP
+ ldrlo r2, [r0]
+ strlo r2, [r0]
+#endif
blo 1b
mov r0, #0
mcr p15, 0, r0, c7, c10, 4 @ drain write buffer
@@ -214,6 +226,9 @@ ENTRY(v6_dma_inv_range)
ENTRY(v6_dma_clean_range)
bic r0, r0, #D_CACHE_LINE_SIZE - 1
1:
+#ifdef CONFIG_SMP
+ ldr r2, [r0]
+#endif
#ifdef HARVARD_CACHE
mcr p15, 0, r0, c7, c10, 1 @ clean D line
#else
@@ -232,6 +247,10 @@ ENTRY(v6_dma_clean_range)
* - end - virtual end address of region
*/
ENTRY(v6_dma_flush_range)
+#ifdef CONFIG_SMP
+ ldrb r2, [r0]
+ strb r2, [r0]
+#endif
bic r0, r0, #D_CACHE_LINE_SIZE - 1
1:
#ifdef HARVARD_CACHE
@@ -241,6 +260,10 @@ ENTRY(v6_dma_flush_range)
#endif
add r0, r0, #D_CACHE_LINE_SIZE
cmp r0, r1
+#ifdef CONFIG_SMP
+ ldrlob r2, [r0]
+ strlob r2, [r0]
+#endif
blo 1b
mov r0, #0
mcr p15, 0, r0, c7, c10, 4 @ drain write buffer