From: Nishanth Aravamudan <nacc@linux.vnet.ibm.com> To: Matthew Wilcox <willy@linux.intel.com> Cc: Keith Busch <keith.busch@intel.com>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au>, Alexey Kardashevskiy <aik@ozlabs.ru>, David Gibson <david@gibson.dropbear.id.au>, Christoph Hellwig <hch@infradead.org>, linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH 1/5 v2] dma-mapping: add generic dma_get_page_shift API Date: Fri, 2 Oct 2015 13:11:42 -0700 [thread overview] Message-ID: <20151002201142.GC40695@linux.vnet.ibm.com> (raw) In-Reply-To: <20151002200953.GB40695@linux.vnet.ibm.com> Drivers like NVMe need to be able to determine the page size used for DMA transfers. Add a new API that defaults to return PAGE_SHIFT on all architectures. Signed-off-by: Nishanth Aravamudan <nacc@linux.vnet.ibm.com> diff --git a/include/asm-generic/dma-mapping-common.h b/include/asm-generic/dma-mapping-common.h index b1bc954..86e4e97 100644 --- a/include/asm-generic/dma-mapping-common.h +++ b/include/asm-generic/dma-mapping-common.h @@ -355,4 +355,11 @@ static inline int dma_set_mask(struct device *dev, u64 mask) } #endif +#ifndef HAVE_ARCH_DMA_GET_PAGE_SHIFT +static inline unsigned long dma_get_page_shift(struct device *dev) +{ + return PAGE_SHIFT; +} +#endif + #endif
WARNING: multiple messages have this Message-ID (diff)
From: nacc@linux.vnet.ibm.com (Nishanth Aravamudan) Subject: [PATCH 1/5 v2] dma-mapping: add generic dma_get_page_shift API Date: Fri, 2 Oct 2015 13:11:42 -0700 [thread overview] Message-ID: <20151002201142.GC40695@linux.vnet.ibm.com> (raw) In-Reply-To: <20151002200953.GB40695@linux.vnet.ibm.com> Drivers like NVMe need to be able to determine the page size used for DMA transfers. Add a new API that defaults to return PAGE_SHIFT on all architectures. Signed-off-by: Nishanth Aravamudan <nacc at linux.vnet.ibm.com> diff --git a/include/asm-generic/dma-mapping-common.h b/include/asm-generic/dma-mapping-common.h index b1bc954..86e4e97 100644 --- a/include/asm-generic/dma-mapping-common.h +++ b/include/asm-generic/dma-mapping-common.h @@ -355,4 +355,11 @@ static inline int dma_set_mask(struct device *dev, u64 mask) } #endif +#ifndef HAVE_ARCH_DMA_GET_PAGE_SHIFT +static inline unsigned long dma_get_page_shift(struct device *dev) +{ + return PAGE_SHIFT; +} +#endif + #endif
next prev parent reply other threads:[~2015-10-02 20:11 UTC|newest] Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-10-02 17:16 [PATCH 0/2] Fix NVMe driver support on Power with 32-bit DMA Nishanth Aravamudan 2015-10-02 17:16 ` Nishanth Aravamudan 2015-10-02 17:18 ` [PATCH 1/2] powerpc/iommu: expose IOMMU page shift Nishanth Aravamudan 2015-10-02 17:18 ` Nishanth Aravamudan 2015-10-02 17:23 ` [PATCH 2/2] drivers/nvme: default to the IOMMU page size on Power Nishanth Aravamudan 2015-10-02 17:23 ` Nishanth Aravamudan 2015-10-02 17:25 ` Christoph Hellwig 2015-10-02 17:25 ` Christoph Hellwig 2015-10-02 17:39 ` Nishanth Aravamudan 2015-10-02 17:39 ` Nishanth Aravamudan 2015-10-02 17:41 ` Christoph Hellwig 2015-10-02 17:41 ` Christoph Hellwig 2015-10-02 18:57 ` kbuild test robot 2015-10-02 18:57 ` kbuild test robot 2015-10-06 3:19 ` [PATCH 1/2] powerpc/iommu: expose IOMMU page shift David Gibson 2015-10-06 3:19 ` David Gibson 2015-10-12 16:03 ` Nishanth Aravamudan 2015-10-12 16:03 ` Nishanth Aravamudan 2015-10-12 21:10 ` Nishanth Aravamudan 2015-10-12 21:10 ` Nishanth Aravamudan 2015-10-02 20:09 ` [PATCH 0/5 v2] Fix NVMe driver support on Power with 32-bit DMA Nishanth Aravamudan 2015-10-02 20:09 ` Nishanth Aravamudan 2015-10-02 20:11 ` Nishanth Aravamudan [this message] 2015-10-02 20:11 ` [PATCH 1/5 v2] dma-mapping: add generic dma_get_page_shift API Nishanth Aravamudan 2015-10-02 20:16 ` [PATCH 2/5 v2] powerpc/dma-mapping: override dma_get_page_shift Nishanth Aravamudan 2015-10-02 20:16 ` Nishanth Aravamudan 2015-10-02 20:19 ` [PATCH 3/5 v2] powerpc/dma: implement per-platform dma_get_page_shift Nishanth Aravamudan 2015-10-02 20:19 ` Nishanth Aravamudan 2015-10-02 20:21 ` [PATCH 4/5 v2] pseries/iommu: implement DDW-aware dma_get_page_shift Nishanth Aravamudan 2015-10-02 20:21 ` Nishanth Aravamudan 2015-10-02 20:30 ` [PATCH 5/5 v2] drivers/nvme: default to the IOMMU page size Nishanth Aravamudan 2015-10-02 20:30 ` Nishanth Aravamudan 2015-10-02 20:43 ` kbuild test robot 2015-10-02 20:43 ` kbuild test robot 2015-10-02 20:33 ` [PATCH 4/5 v2] pseries/iommu: implement DDW-aware dma_get_page_shift kbuild test robot 2015-10-02 20:33 ` kbuild test robot 2015-10-06 3:39 ` Michael Ellerman 2015-10-06 3:39 ` Michael Ellerman 2015-10-07 13:56 ` [kbuild-all] " Fengguang Wu 2015-10-07 13:56 ` Fengguang Wu 2015-10-08 0:11 ` Michael Ellerman 2015-10-08 0:11 ` Michael Ellerman 2015-10-08 0:11 ` Michael Ellerman 2015-10-08 1:06 ` Fengguang Wu 2015-10-08 1:06 ` Fengguang Wu 2015-10-08 1:16 ` Fengguang Wu 2015-10-08 1:16 ` Fengguang Wu 2015-10-08 4:06 ` Michael Ellerman 2015-10-08 4:06 ` Michael Ellerman 2015-10-08 4:06 ` Michael Ellerman 2015-10-11 14:22 ` Fengguang Wu 2015-10-11 14:22 ` Fengguang Wu 2015-10-12 2:51 ` Michael Ellerman 2015-10-12 2:51 ` Michael Ellerman 2015-10-12 2:51 ` Michael Ellerman 2015-10-08 7:46 ` Christoph Hellwig 2015-10-08 7:46 ` Christoph Hellwig 2015-10-11 14:19 ` testing email patches Fengguang Wu 2015-10-11 14:19 ` Fengguang Wu 2015-10-06 3:43 ` [PATCH 1/5 v2] dma-mapping: add generic dma_get_page_shift API Michael Ellerman 2015-10-06 3:43 ` Michael Ellerman 2015-10-06 3:43 ` Michael Ellerman 2015-10-06 9:51 ` Christoph Hellwig 2015-10-06 9:51 ` Christoph Hellwig 2015-10-12 16:04 ` Nishanth Aravamudan 2015-10-12 16:04 ` Nishanth Aravamudan 2015-10-12 21:06 ` Nishanth Aravamudan 2015-10-12 21:06 ` Nishanth Aravamudan 2015-10-14 15:39 ` Nishanth Aravamudan 2015-10-14 15:39 ` Nishanth Aravamudan 2015-10-14 15:42 ` Christoph Hellwig 2015-10-14 15:42 ` Christoph Hellwig 2015-10-15 22:52 ` Nishanth Aravamudan 2015-10-15 22:52 ` Nishanth Aravamudan 2015-10-15 22:52 ` Nishanth Aravamudan 2015-10-19 17:56 ` Nishanth Aravamudan 2015-10-19 17:56 ` Nishanth Aravamudan 2015-10-19 17:56 ` Nishanth Aravamudan 2015-10-02 20:51 ` [PATCH 0/5 v2] Fix NVMe driver support on Power with 32-bit DMA Benjamin Herrenschmidt 2015-10-02 20:51 ` Benjamin Herrenschmidt 2015-10-02 21:04 ` Nishanth Aravamudan 2015-10-02 21:04 ` Nishanth Aravamudan 2015-10-02 21:35 ` Benjamin Herrenschmidt 2015-10-02 21:35 ` Benjamin Herrenschmidt 2015-10-02 21:48 ` Nishanth Aravamudan 2015-10-02 21:48 ` Nishanth Aravamudan 2015-10-03 8:19 ` Christoph Hellwig 2015-10-03 8:19 ` Christoph Hellwig
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