From de79f4ab882b2955432eb8104fd5426745262e83 Mon Sep 17 00:00:00 2001 From: Paul Wassi Date: Tue, 13 Mar 2018 09:43:43 +0100 Subject: brcm47xx: add kernel 4.14 support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add patches for 4.14, drop patch 030 since it's already included upstream. Tested on: 1) WRT54GL (with RAM upgraded to 32 MiB) 2) WL500gPv2 (with RAM upgraded to 64 MiB) 3) BCM47186B0 SoC board 4) BCM4706 SoC board Signed-off-by: Paul Wassi Signed-off-by: Rafał Miłecki --- .../brcm47xx/patches-4.14/160-kmap_coherent.patch | 78 ++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 target/linux/brcm47xx/patches-4.14/160-kmap_coherent.patch (limited to 'target/linux/brcm47xx/patches-4.14/160-kmap_coherent.patch') diff --git a/target/linux/brcm47xx/patches-4.14/160-kmap_coherent.patch b/target/linux/brcm47xx/patches-4.14/160-kmap_coherent.patch new file mode 100644 index 0000000..60484dd --- /dev/null +++ b/target/linux/brcm47xx/patches-4.14/160-kmap_coherent.patch @@ -0,0 +1,78 @@ +From: Jeff Hansen +Subject: [PATCH] kmap_coherent + +On ASUS WL-500gP there are some "Data bus error"s when executing simple +commands liks "ps" or "cat /proc/1/cmdline". + +This fixes OpenWrt ticket #1485: https://dev.openwrt.org/ticket/1485 +--- +--- a/arch/mips/include/asm/cpu-features.h ++++ b/arch/mips/include/asm/cpu-features.h +@@ -187,6 +187,9 @@ + #ifndef cpu_has_local_ebase + #define cpu_has_local_ebase 1 + #endif ++#ifndef cpu_use_kmap_coherent ++#define cpu_use_kmap_coherent 1 ++#endif + + /* + * I-Cache snoops remote store. This only matters on SMP. Some multiprocessors +--- a/arch/mips/include/asm/mach-bcm47xx/cpu-feature-overrides.h ++++ b/arch/mips/include/asm/mach-bcm47xx/cpu-feature-overrides.h +@@ -80,4 +80,6 @@ + #define cpu_scache_line_size() 0 + #define cpu_has_vz 0 + ++#define cpu_use_kmap_coherent 0 ++ + #endif /* __ASM_MACH_BCM47XX_CPU_FEATURE_OVERRIDES_H */ +--- a/arch/mips/mm/c-r4k.c ++++ b/arch/mips/mm/c-r4k.c +@@ -672,7 +672,7 @@ static inline void local_r4k_flush_cache + map_coherent = (cpu_has_dc_aliases && + page_mapcount(page) && + !Page_dcache_dirty(page)); +- if (map_coherent) ++ if (map_coherent && cpu_use_kmap_coherent) + vaddr = kmap_coherent(page, addr); + else + vaddr = kmap_atomic(page); +@@ -697,7 +697,7 @@ static inline void local_r4k_flush_cache + } + + if (vaddr) { +- if (map_coherent) ++ if (map_coherent && cpu_use_kmap_coherent) + kunmap_coherent(); + else + kunmap_atomic(vaddr); +--- a/arch/mips/mm/init.c ++++ b/arch/mips/mm/init.c +@@ -170,7 +170,7 @@ void copy_user_highpage(struct page *to, + void *vfrom, *vto; + + vto = kmap_atomic(to); +- if (cpu_has_dc_aliases && ++ if (cpu_has_dc_aliases && cpu_use_kmap_coherent && + page_mapcount(from) && !Page_dcache_dirty(from)) { + vfrom = kmap_coherent(from, vaddr); + copy_page(vto, vfrom); +@@ -192,7 +192,7 @@ void copy_to_user_page(struct vm_area_st + struct page *page, unsigned long vaddr, void *dst, const void *src, + unsigned long len) + { +- if (cpu_has_dc_aliases && ++ if (cpu_has_dc_aliases && cpu_use_kmap_coherent && + page_mapcount(page) && !Page_dcache_dirty(page)) { + void *vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK); + memcpy(vto, src, len); +@@ -210,7 +210,7 @@ void copy_from_user_page(struct vm_area_ + struct page *page, unsigned long vaddr, void *dst, const void *src, + unsigned long len) + { +- if (cpu_has_dc_aliases && ++ if (cpu_has_dc_aliases && cpu_use_kmap_coherent && + page_mapcount(page) && !Page_dcache_dirty(page)) { + void *vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK); + memcpy(dst, vfrom, len); -- cgit v1.1