From: Laura Abbott <labbott@redhat.com> To: "Sumit Semwal" <sumit.semwal@linaro.org>, "John Stultz" <john.stultz@linaro.org>, "Arve Hjønnevåg" <arve@android.com>, "Riley Andrews" <riandrews@android.com> Cc: Laura Abbott <labbott@redhat.com>, Daniel Vetter <daniel.vetter@ffwll.ch>, linaro-mm-sig@lists.linaro.org, devel@driverdev.osuosl.org, Russell King <linux@armlinux.org.uk>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, Eun Taik Lee <eun.taik.lee@samsung.com>, Rohit kumar <rohit.kr@samsung.com>, Liviu Dudau <Liviu.Dudau@arm.com>, Jon Medhurst <tixy@linaro.org>, Mitchel Humpherys <mitchelh@codeaurora.org>, Jeremy Gebben <jgebben@codeaurora.org>, Bryan Huntsman <bryanh@codeaurora.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Android Kernel Team <kernel-team@android.com> Subject: [RFCv2][PATCH 3/5] arm64: Implement ARCH_HAS_FORCE_CACHE Date: Mon, 8 Aug 2016 10:49:35 -0700 [thread overview] Message-ID: <1470678577-14010-4-git-send-email-labbott@redhat.com> (raw) In-Reply-To: <1470678577-14010-1-git-send-email-labbott@redhat.com> arm64 may need to guarantee the caches are synced. Implement versions of the kernel_force_cache API based on the DMA APIs. Signed-off-by: Laura Abbott <labbott@redhat.com> --- arch/arm64/include/asm/cacheflush.h | 5 +++++ arch/arm64/mm/flush.c | 11 +++++++++++ 2 files changed, 16 insertions(+) diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h index c64268d..9980dd8 100644 --- a/arch/arm64/include/asm/cacheflush.h +++ b/arch/arm64/include/asm/cacheflush.h @@ -149,4 +149,9 @@ int set_memory_rw(unsigned long addr, int numpages); int set_memory_x(unsigned long addr, int numpages); int set_memory_nx(unsigned long addr, int numpages); +#define ARCH_HAS_FORCE_CACHE 1 + +void kernel_force_cache_clean(struct page *page, size_t size); +void kernel_force_cache_invalidate(struct page *page, size_t size); + #endif diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c index 43a76b0..0af78ab 100644 --- a/arch/arm64/mm/flush.c +++ b/arch/arm64/mm/flush.c @@ -20,6 +20,7 @@ #include <linux/export.h> #include <linux/mm.h> #include <linux/pagemap.h> +#include <linux/dma-mapping.h> #include <asm/cacheflush.h> #include <asm/cachetype.h> @@ -94,3 +95,13 @@ EXPORT_SYMBOL(flush_dcache_page); * Additional functions defined in assembly. */ EXPORT_SYMBOL(flush_icache_range); + +void kernel_force_cache_clean(struct page *page, size_t size) +{ + __dma_map_area(page_address(page), size, DMA_BIDIRECTIONAL); +} + +void kernel_force_cache_invalidate(struct page *page, size_t size) +{ + __dma_unmap_area(page_address(page), size, DMA_BIDIRECTIONAL); +} -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: labbott@redhat.com (Laura Abbott) To: linux-arm-kernel@lists.infradead.org Subject: [RFCv2][PATCH 3/5] arm64: Implement ARCH_HAS_FORCE_CACHE Date: Mon, 8 Aug 2016 10:49:35 -0700 [thread overview] Message-ID: <1470678577-14010-4-git-send-email-labbott@redhat.com> (raw) In-Reply-To: <1470678577-14010-1-git-send-email-labbott@redhat.com> arm64 may need to guarantee the caches are synced. Implement versions of the kernel_force_cache API based on the DMA APIs. Signed-off-by: Laura Abbott <labbott@redhat.com> --- arch/arm64/include/asm/cacheflush.h | 5 +++++ arch/arm64/mm/flush.c | 11 +++++++++++ 2 files changed, 16 insertions(+) diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h index c64268d..9980dd8 100644 --- a/arch/arm64/include/asm/cacheflush.h +++ b/arch/arm64/include/asm/cacheflush.h @@ -149,4 +149,9 @@ int set_memory_rw(unsigned long addr, int numpages); int set_memory_x(unsigned long addr, int numpages); int set_memory_nx(unsigned long addr, int numpages); +#define ARCH_HAS_FORCE_CACHE 1 + +void kernel_force_cache_clean(struct page *page, size_t size); +void kernel_force_cache_invalidate(struct page *page, size_t size); + #endif diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c index 43a76b0..0af78ab 100644 --- a/arch/arm64/mm/flush.c +++ b/arch/arm64/mm/flush.c @@ -20,6 +20,7 @@ #include <linux/export.h> #include <linux/mm.h> #include <linux/pagemap.h> +#include <linux/dma-mapping.h> #include <asm/cacheflush.h> #include <asm/cachetype.h> @@ -94,3 +95,13 @@ EXPORT_SYMBOL(flush_dcache_page); * Additional functions defined in assembly. */ EXPORT_SYMBOL(flush_icache_range); + +void kernel_force_cache_clean(struct page *page, size_t size) +{ + __dma_map_area(page_address(page), size, DMA_BIDIRECTIONAL); +} + +void kernel_force_cache_invalidate(struct page *page, size_t size) +{ + __dma_unmap_area(page_address(page), size, DMA_BIDIRECTIONAL); +} -- 2.7.4
next prev parent reply other threads:[~2016-08-08 17:50 UTC|newest] Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-08-08 17:49 [RFCv2][PATCH 0/5] Cleanup Ion mapping/caching Laura Abbott 2016-08-08 17:49 ` Laura Abbott 2016-08-08 17:49 ` [RFCv2][PATCH 1/5] Documentation: Introduce kernel_force_cache_* APIs Laura Abbott 2016-08-08 17:49 ` Laura Abbott 2016-08-08 17:49 ` [RFCv2][PATCH 2/5] arm: Implement ARCH_HAS_FORCE_CACHE Laura Abbott 2016-08-08 17:49 ` Laura Abbott 2016-08-09 21:56 ` Florian Fainelli 2016-08-09 21:56 ` Florian Fainelli 2016-08-10 0:13 ` Laura Abbott 2016-08-10 0:13 ` Laura Abbott 2016-08-10 0:20 ` Florian Fainelli 2016-08-10 0:20 ` Florian Fainelli 2016-08-10 23:22 ` Russell King - ARM Linux 2016-08-10 23:22 ` Russell King - ARM Linux 2016-08-16 20:39 ` Laura Abbott 2016-08-16 20:39 ` Laura Abbott 2016-08-08 17:49 ` Laura Abbott [this message] 2016-08-08 17:49 ` [RFCv2][PATCH 3/5] arm64: " Laura Abbott 2016-08-08 17:49 ` [RFCv2][PATCH 4/5] staging: android: ion: Convert to the kernel_force_cache APIs Laura Abbott 2016-08-08 17:49 ` Laura Abbott 2016-08-08 17:49 ` [RFCv2][PATCH 5/5] staging: ion: Add support for syncing with DMA_BUF_IOCTL_SYNC Laura Abbott 2016-08-08 17:49 ` Laura Abbott
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