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authorJohn Crispin <john@openwrt.org>2014-11-26 09:00:08 +0000
committerJohn Crispin <john@openwrt.org>2014-11-26 09:00:08 +0000
commit72b58f2eb12ad4aa0c59481d0911dc5e39180eb5 (patch)
treebe51e2d36c4175443bd3ab42824df80c6b9a2efe /target/linux/oxnas/patches-3.18/010-arm_introduce-dma-fiq-irq-broadcast.patch
parent40da7aae54ad7f098064f18e28eb8201afedfd5c (diff)
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add new target 'oxnas'
This is the oxnas target previously developed at http://gitorious.org/openwrt-oxnas Basically, this consolidates the changes and addtionas from http://github.org/kref/linux-oxnas into a new OpenWrt hardware target 'oxnas' adding support for PLX Technology NAS7820/NAS7821/NAS7825/... formally known as Oxford Semiconductor OXE810SE/OXE815/OX820/... For now there are 4 supported boards: Cloud Engines Pogoplug V3 (without PCIe) fully supported Cloud Engines Pogoplug Pro (with PCIe) fully supported MitraStar STG-212 aka ZyXEL NSA-212, aka Medion Akoya P89625 / P89636 / P89626 / P89630, aka Medion MD 86407 / MD 86805 / MD 86517 / MD 86587 fully supported, see http://wiki.openwrt.org/toh/medion/md86587 Shuttle KD-20 partially supported (S-ATA driver lacks support for 2nd port) Signed-off-by: Daniel Golle <daniel@makrotopia.org> SVN-Revision: 43388
Diffstat (limited to 'target/linux/oxnas/patches-3.18/010-arm_introduce-dma-fiq-irq-broadcast.patch')
-rw-r--r--target/linux/oxnas/patches-3.18/010-arm_introduce-dma-fiq-irq-broadcast.patch62
1 files changed, 62 insertions, 0 deletions
diff --git a/target/linux/oxnas/patches-3.18/010-arm_introduce-dma-fiq-irq-broadcast.patch b/target/linux/oxnas/patches-3.18/010-arm_introduce-dma-fiq-irq-broadcast.patch
new file mode 100644
index 0000000000..fb7547f96b
--- /dev/null
+++ b/target/linux/oxnas/patches-3.18/010-arm_introduce-dma-fiq-irq-broadcast.patch
@@ -0,0 +1,62 @@
+Index: linux-3.18-rc4/arch/arm/include/asm/glue-cache.h
+===================================================================
+--- linux-3.18-rc4.orig/arch/arm/include/asm/glue-cache.h
++++ linux-3.18-rc4/arch/arm/include/asm/glue-cache.h
+@@ -156,11 +156,19 @@ static inline void nop_dma_unmap_area(co
+ #define __cpuc_flush_user_range __glue(_CACHE,_flush_user_cache_range)
+ #define __cpuc_coherent_kern_range __glue(_CACHE,_coherent_kern_range)
+ #define __cpuc_coherent_user_range __glue(_CACHE,_coherent_user_range)
++#ifndef CONFIG_DMA_CACHE_FIQ_BROADCAST
+ #define __cpuc_flush_dcache_area __glue(_CACHE,_flush_kern_dcache_area)
+
+ #define dmac_map_area __glue(_CACHE,_dma_map_area)
+ #define dmac_unmap_area __glue(_CACHE,_dma_unmap_area)
+ #define dmac_flush_range __glue(_CACHE,_dma_flush_range)
++#else
++#define __cpuc_flush_dcache_area __glue(fiq,_flush_kern_dcache_area)
++
++#define dmac_map_area __glue(fiq,_dma_map_area)
++#define dmac_unmap_area __glue(fiq,_dma_unmap_area)
++#define dmac_flush_range __glue(fiq,_dma_flush_range)
++#endif /* CONFIG_DMA_CACHE_FIQ_BROADCAST */
+ #endif
+
+ #endif
+Index: linux-3.18-rc4/arch/arm/mm/Kconfig
+===================================================================
+--- linux-3.18-rc4.orig/arch/arm/mm/Kconfig
++++ linux-3.18-rc4/arch/arm/mm/Kconfig
+@@ -843,6 +843,17 @@ config DMA_CACHE_RWFO
+ in hardware, other workarounds are needed (e.g. cache
+ maintenance broadcasting in software via FIQ).
+
++config DMA_CACHE_FIQ_BROADCAST
++ bool "Enable fiq broadcast DMA cache maintenance"
++ depends on CPU_V6K && SMP
++ select FIQ
++ help
++ The Snoop Control Unit on ARM11MPCore does not detect the
++ cache maintenance operations and the dma_{map,unmap}_area()
++ functions may leave stale cache entries on other CPUs. By
++ enabling this option, fiq broadcast in the ARMv6
++ DMA cache maintenance functions is performed.
++
+ config OUTER_CACHE
+ bool
+
+Index: linux-3.18-rc4/arch/arm/mm/flush.c
+===================================================================
+--- linux-3.18-rc4.orig/arch/arm/mm/flush.c
++++ linux-3.18-rc4/arch/arm/mm/flush.c
+@@ -314,7 +314,11 @@ void flush_dcache_page(struct page *page
+
+ mapping = page_mapping(page);
+
++#ifndef CONFIG_DMA_CACHE_FIQ_BROADCAST
+ if (!cache_ops_need_broadcast() &&
++#else
++ if (
++#endif
+ mapping && !page_mapped(page))
+ clear_bit(PG_dcache_clean, &page->flags);
+ else {