From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: [PATCH 2/5] dma-mapping: move the dma_coherent flag to struct device Date: Mon, 10 Sep 2018 08:05:30 +0200 Message-ID: <20180910060533.27172-3-hch@lst.de> References: <20180910060533.27172-1-hch@lst.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20180910060533.27172-1-hch-jcswGhMUV9g@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Cc: linux-mips-6z/3iImG2C8G8FEW9MqTrA@public.gmane.org, Greg Kroah-Hartman , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Paul Burton , Robin Murphy List-Id: iommu@lists.linux-foundation.org Various architectures support both coherent and non-coherent dma on a per-device basis. Move the dma_noncoherent flag from the mips archdata field to struct device proper to prepare the infrastructure for reuse on other architectures. Signed-off-by: Christoph Hellwig Acked-by: Paul Burton --- arch/mips/Kconfig | 1 + arch/mips/include/asm/Kbuild | 1 + arch/mips/include/asm/device.h | 19 ---------------- arch/mips/include/asm/dma-coherence.h | 6 +++++ arch/mips/include/asm/dma-mapping.h | 2 +- arch/mips/mm/dma-noncoherent.c | 32 +++++---------------------- include/linux/device.h | 7 ++++++ include/linux/dma-noncoherent.h | 16 ++++++++++++++ kernel/dma/Kconfig | 3 +++ 9 files changed, 41 insertions(+), 46 deletions(-) delete mode 100644 arch/mips/include/asm/device.h diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 0b25180028b8..54c52bd0d9d3 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1106,6 +1106,7 @@ config ARCH_SUPPORTS_UPROBES bool config DMA_MAYBE_COHERENT + select ARCH_HAS_DMA_COHERENCE_H select DMA_NONCOHERENT bool diff --git a/arch/mips/include/asm/Kbuild b/arch/mips/include/asm/Kbuild index 58351e48421e..9a81e72119da 100644 --- a/arch/mips/include/asm/Kbuild +++ b/arch/mips/include/asm/Kbuild @@ -1,6 +1,7 @@ # MIPS headers generic-(CONFIG_GENERIC_CSUM) += checksum.h generic-y += current.h +generic-y += device.h generic-y += dma-contiguous.h generic-y += emergency-restart.h generic-y += export.h diff --git a/arch/mips/include/asm/device.h b/arch/mips/include/asm/device.h deleted file mode 100644 index 6aa796f1081a..000000000000 --- a/arch/mips/include/asm/device.h +++ /dev/null @@ -1,19 +0,0 @@ -/* - * Arch specific extensions to struct device - * - * This file is released under the GPLv2 - */ -#ifndef _ASM_MIPS_DEVICE_H -#define _ASM_MIPS_DEVICE_H - -struct dev_archdata { -#ifdef CONFIG_DMA_PERDEV_COHERENT - /* Non-zero if DMA is coherent with CPU caches */ - bool dma_coherent; -#endif -}; - -struct pdev_archdata { -}; - -#endif /* _ASM_MIPS_DEVICE_H*/ diff --git a/arch/mips/include/asm/dma-coherence.h b/arch/mips/include/asm/dma-coherence.h index 8eda48748ed5..876ba0d14cde 100644 --- a/arch/mips/include/asm/dma-coherence.h +++ b/arch/mips/include/asm/dma-coherence.h @@ -20,6 +20,12 @@ enum coherent_io_user_state { #elif defined(CONFIG_DMA_MAYBE_COHERENT) extern enum coherent_io_user_state coherentio; extern int hw_coherentio; + +static inline int dev_is_dma_coherent(struct device *dev) +{ + return coherentio == IO_COHERENCE_ENABLED || + (coherentio == IO_COHERENCE_DEFAULT && hw_coherentio); +} #else #ifdef CONFIG_DMA_NONCOHERENT #define coherentio IO_COHERENCE_DISABLED diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h index e81c4e97ff1a..40d825c779de 100644 --- a/arch/mips/include/asm/dma-mapping.h +++ b/arch/mips/include/asm/dma-mapping.h @@ -25,7 +25,7 @@ static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base, bool coherent) { #ifdef CONFIG_DMA_PERDEV_COHERENT - dev->archdata.dma_coherent = coherent; + dev->dma_coherent = coherent; #endif } diff --git a/arch/mips/mm/dma-noncoherent.c b/arch/mips/mm/dma-noncoherent.c index 2aca1236af36..d408ac51f56c 100644 --- a/arch/mips/mm/dma-noncoherent.c +++ b/arch/mips/mm/dma-noncoherent.c @@ -14,26 +14,6 @@ #include #include -#ifdef CONFIG_DMA_PERDEV_COHERENT -static inline int dev_is_coherent(struct device *dev) -{ - return dev->archdata.dma_coherent; -} -#else -static inline int dev_is_coherent(struct device *dev) -{ - switch (coherentio) { - default: - case IO_COHERENCE_DEFAULT: - return hw_coherentio; - case IO_COHERENCE_ENABLED: - return 1; - case IO_COHERENCE_DISABLED: - return 0; - } -} -#endif /* CONFIG_DMA_PERDEV_COHERENT */ - /* * The affected CPUs below in 'cpu_needs_post_dma_flush()' can speculatively * fill random cachelines with stale data at any time, requiring an extra @@ -49,7 +29,7 @@ static inline int dev_is_coherent(struct device *dev) */ static inline bool cpu_needs_post_dma_flush(struct device *dev) { - if (dev_is_coherent(dev)) + if (dev_is_dma_coherent(dev)) return false; switch (boot_cpu_type()) { @@ -76,7 +56,7 @@ void *arch_dma_alloc(struct device *dev, size_t size, if (!ret) return NULL; - if (!dev_is_coherent(dev) && !(attrs & DMA_ATTR_NON_CONSISTENT)) { + if (!dev_is_dma_coherent(dev) && !(attrs & DMA_ATTR_NON_CONSISTENT)) { dma_cache_wback_inv((unsigned long) ret, size); ret = (void *)UNCAC_ADDR(ret); } @@ -87,7 +67,7 @@ void *arch_dma_alloc(struct device *dev, size_t size, void arch_dma_free(struct device *dev, size_t size, void *cpu_addr, dma_addr_t dma_addr, unsigned long attrs) { - if (!(attrs & DMA_ATTR_NON_CONSISTENT) && !dev_is_coherent(dev)) + if (!(attrs & DMA_ATTR_NON_CONSISTENT) && !dev_is_dma_coherent(dev)) cpu_addr = (void *)CAC_ADDR((unsigned long)cpu_addr); dma_direct_free(dev, size, cpu_addr, dma_addr, attrs); } @@ -103,7 +83,7 @@ int arch_dma_mmap(struct device *dev, struct vm_area_struct *vma, unsigned long pfn; int ret = -ENXIO; - if (!dev_is_coherent(dev)) + if (!dev_is_dma_coherent(dev)) addr = CAC_ADDR(addr); pfn = page_to_pfn(virt_to_page((void *)addr)); @@ -187,7 +167,7 @@ static inline void dma_sync_phys(phys_addr_t paddr, size_t size, void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr, size_t size, enum dma_data_direction dir) { - if (!dev_is_coherent(dev)) + if (!dev_is_dma_coherent(dev)) dma_sync_phys(paddr, size, dir); } @@ -203,6 +183,6 @@ void arch_dma_cache_sync(struct device *dev, void *vaddr, size_t size, { BUG_ON(direction == DMA_NONE); - if (!dev_is_coherent(dev)) + if (!dev_is_dma_coherent(dev)) dma_sync_virt(vaddr, size, direction); } diff --git a/include/linux/device.h b/include/linux/device.h index 8f882549edee..983506789402 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -927,6 +927,8 @@ struct dev_links_info { * @offline: Set after successful invocation of bus type's .offline(). * @of_node_reused: Set if the device-tree node is shared with an ancestor * device. + * @dma_coherent: this particular device is dma coherent, even if the + * architecture supports non-coherent devices. * * At the lowest level, every device in a Linux system is represented by an * instance of struct device. The device structure contains the information @@ -1016,6 +1018,11 @@ struct device { bool offline_disabled:1; bool offline:1; bool of_node_reused:1; +#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \ + defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \ + defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) + bool dma_coherent:1; +#endif }; static inline struct device *kobj_to_dev(struct kobject *kobj) diff --git a/include/linux/dma-noncoherent.h b/include/linux/dma-noncoherent.h index a0aa00cc909d..69630ec320be 100644 --- a/include/linux/dma-noncoherent.h +++ b/include/linux/dma-noncoherent.h @@ -4,6 +4,22 @@ #include +#ifdef CONFIG_ARCH_HAS_DMA_COHERENCE_H +#include +#elif defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \ + defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \ + defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) +static inline int dev_is_dma_coherent(struct device *dev) +{ + return dev->dma_coherent; +} +#else +static inline int dev_is_dma_coherent(struct device *dev) +{ + return true; +} +#endif /* CONFIG_ARCH_HAS_DMA_COHERENCE_H */ + void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs); void arch_dma_free(struct device *dev, size_t size, void *cpu_addr, diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index 9bd54304446f..040859ac2a56 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -13,6 +13,9 @@ config NEED_DMA_MAP_STATE config ARCH_DMA_ADDR_T_64BIT def_bool 64BIT || PHYS_ADDR_T_64BIT +config ARCH_HAS_DMA_COHERENCE_H + bool + config HAVE_GENERIC_DMA_COHERENT bool -- 2.18.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Mon, 10 Sep 2018 08:06:13 +0200 (CEST) Received: from bombadil.infradead.org ([IPv6:2607:7c80:54:e::133]:38074 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S23992087AbeIJGF5zL44w (ORCPT ); Mon, 10 Sep 2018 08:05:57 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=ZRV///W/g0ll9ZGvdUDkLdphVAe6+VSHbWQZ8byZatw=; b=tv1HCMgZPqS5zH5KjtAtT+I9/ z6ELvMMvPgvzhNnz7LAasa5jH9hRPeyMQa5LZG3tq7JAy7vmcUNjIM1EOf+aoTqTMyNNvaDux0aFJ Th6rnJPwusjOaK10PIwRp7TrdY69q7AgQIWB/PawhZ2yiSG5yDsolK51VUwt6olzdi/Wy3umYzS6L 9qzEzPhEVwXo2z77da9ur5zB6VXYMzRR1UTHwifkPohgAnO1zLvVyEn5ln7Zd2PoKLJJ5F0Fp7DWM 6y2YnEsDxa5tSCsDerfaHjGZRkEn9pkNaH4bGdIPA6jEoNarRsHfGfASeqvNcjc/gFZRR292LwgaW G57eZ0ZTA==; Received: from 213-225-3-213.nat.highway.a1.net ([213.225.3.213] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1fzFKQ-00080f-AA; Mon, 10 Sep 2018 06:05:42 +0000 From: Christoph Hellwig To: iommu@lists.linux-foundation.org Cc: Marek Szyprowski , Robin Murphy , Paul Burton , Greg Kroah-Hartman , linux-mips@linux-mips.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/5] dma-mapping: move the dma_coherent flag to struct device Date: Mon, 10 Sep 2018 08:05:30 +0200 Message-Id: <20180910060533.27172-3-hch@lst.de> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180910060533.27172-1-hch@lst.de> References: <20180910060533.27172-1-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 66169 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: hch@lst.de Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips Various architectures support both coherent and non-coherent dma on a per-device basis. Move the dma_noncoherent flag from the mips archdata field to struct device proper to prepare the infrastructure for reuse on other architectures. Signed-off-by: Christoph Hellwig Acked-by: Paul Burton --- arch/mips/Kconfig | 1 + arch/mips/include/asm/Kbuild | 1 + arch/mips/include/asm/device.h | 19 ---------------- arch/mips/include/asm/dma-coherence.h | 6 +++++ arch/mips/include/asm/dma-mapping.h | 2 +- arch/mips/mm/dma-noncoherent.c | 32 +++++---------------------- include/linux/device.h | 7 ++++++ include/linux/dma-noncoherent.h | 16 ++++++++++++++ kernel/dma/Kconfig | 3 +++ 9 files changed, 41 insertions(+), 46 deletions(-) delete mode 100644 arch/mips/include/asm/device.h diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 0b25180028b8..54c52bd0d9d3 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1106,6 +1106,7 @@ config ARCH_SUPPORTS_UPROBES bool config DMA_MAYBE_COHERENT + select ARCH_HAS_DMA_COHERENCE_H select DMA_NONCOHERENT bool diff --git a/arch/mips/include/asm/Kbuild b/arch/mips/include/asm/Kbuild index 58351e48421e..9a81e72119da 100644 --- a/arch/mips/include/asm/Kbuild +++ b/arch/mips/include/asm/Kbuild @@ -1,6 +1,7 @@ # MIPS headers generic-(CONFIG_GENERIC_CSUM) += checksum.h generic-y += current.h +generic-y += device.h generic-y += dma-contiguous.h generic-y += emergency-restart.h generic-y += export.h diff --git a/arch/mips/include/asm/device.h b/arch/mips/include/asm/device.h deleted file mode 100644 index 6aa796f1081a..000000000000 --- a/arch/mips/include/asm/device.h +++ /dev/null @@ -1,19 +0,0 @@ -/* - * Arch specific extensions to struct device - * - * This file is released under the GPLv2 - */ -#ifndef _ASM_MIPS_DEVICE_H -#define _ASM_MIPS_DEVICE_H - -struct dev_archdata { -#ifdef CONFIG_DMA_PERDEV_COHERENT - /* Non-zero if DMA is coherent with CPU caches */ - bool dma_coherent; -#endif -}; - -struct pdev_archdata { -}; - -#endif /* _ASM_MIPS_DEVICE_H*/ diff --git a/arch/mips/include/asm/dma-coherence.h b/arch/mips/include/asm/dma-coherence.h index 8eda48748ed5..876ba0d14cde 100644 --- a/arch/mips/include/asm/dma-coherence.h +++ b/arch/mips/include/asm/dma-coherence.h @@ -20,6 +20,12 @@ enum coherent_io_user_state { #elif defined(CONFIG_DMA_MAYBE_COHERENT) extern enum coherent_io_user_state coherentio; extern int hw_coherentio; + +static inline int dev_is_dma_coherent(struct device *dev) +{ + return coherentio == IO_COHERENCE_ENABLED || + (coherentio == IO_COHERENCE_DEFAULT && hw_coherentio); +} #else #ifdef CONFIG_DMA_NONCOHERENT #define coherentio IO_COHERENCE_DISABLED diff --git a/arch/mips/include/asm/dma-mapping.h b/arch/mips/include/asm/dma-mapping.h index e81c4e97ff1a..40d825c779de 100644 --- a/arch/mips/include/asm/dma-mapping.h +++ b/arch/mips/include/asm/dma-mapping.h @@ -25,7 +25,7 @@ static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base, bool coherent) { #ifdef CONFIG_DMA_PERDEV_COHERENT - dev->archdata.dma_coherent = coherent; + dev->dma_coherent = coherent; #endif } diff --git a/arch/mips/mm/dma-noncoherent.c b/arch/mips/mm/dma-noncoherent.c index 2aca1236af36..d408ac51f56c 100644 --- a/arch/mips/mm/dma-noncoherent.c +++ b/arch/mips/mm/dma-noncoherent.c @@ -14,26 +14,6 @@ #include #include -#ifdef CONFIG_DMA_PERDEV_COHERENT -static inline int dev_is_coherent(struct device *dev) -{ - return dev->archdata.dma_coherent; -} -#else -static inline int dev_is_coherent(struct device *dev) -{ - switch (coherentio) { - default: - case IO_COHERENCE_DEFAULT: - return hw_coherentio; - case IO_COHERENCE_ENABLED: - return 1; - case IO_COHERENCE_DISABLED: - return 0; - } -} -#endif /* CONFIG_DMA_PERDEV_COHERENT */ - /* * The affected CPUs below in 'cpu_needs_post_dma_flush()' can speculatively * fill random cachelines with stale data at any time, requiring an extra @@ -49,7 +29,7 @@ static inline int dev_is_coherent(struct device *dev) */ static inline bool cpu_needs_post_dma_flush(struct device *dev) { - if (dev_is_coherent(dev)) + if (dev_is_dma_coherent(dev)) return false; switch (boot_cpu_type()) { @@ -76,7 +56,7 @@ void *arch_dma_alloc(struct device *dev, size_t size, if (!ret) return NULL; - if (!dev_is_coherent(dev) && !(attrs & DMA_ATTR_NON_CONSISTENT)) { + if (!dev_is_dma_coherent(dev) && !(attrs & DMA_ATTR_NON_CONSISTENT)) { dma_cache_wback_inv((unsigned long) ret, size); ret = (void *)UNCAC_ADDR(ret); } @@ -87,7 +67,7 @@ void *arch_dma_alloc(struct device *dev, size_t size, void arch_dma_free(struct device *dev, size_t size, void *cpu_addr, dma_addr_t dma_addr, unsigned long attrs) { - if (!(attrs & DMA_ATTR_NON_CONSISTENT) && !dev_is_coherent(dev)) + if (!(attrs & DMA_ATTR_NON_CONSISTENT) && !dev_is_dma_coherent(dev)) cpu_addr = (void *)CAC_ADDR((unsigned long)cpu_addr); dma_direct_free(dev, size, cpu_addr, dma_addr, attrs); } @@ -103,7 +83,7 @@ int arch_dma_mmap(struct device *dev, struct vm_area_struct *vma, unsigned long pfn; int ret = -ENXIO; - if (!dev_is_coherent(dev)) + if (!dev_is_dma_coherent(dev)) addr = CAC_ADDR(addr); pfn = page_to_pfn(virt_to_page((void *)addr)); @@ -187,7 +167,7 @@ static inline void dma_sync_phys(phys_addr_t paddr, size_t size, void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr, size_t size, enum dma_data_direction dir) { - if (!dev_is_coherent(dev)) + if (!dev_is_dma_coherent(dev)) dma_sync_phys(paddr, size, dir); } @@ -203,6 +183,6 @@ void arch_dma_cache_sync(struct device *dev, void *vaddr, size_t size, { BUG_ON(direction == DMA_NONE); - if (!dev_is_coherent(dev)) + if (!dev_is_dma_coherent(dev)) dma_sync_virt(vaddr, size, direction); } diff --git a/include/linux/device.h b/include/linux/device.h index 8f882549edee..983506789402 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -927,6 +927,8 @@ struct dev_links_info { * @offline: Set after successful invocation of bus type's .offline(). * @of_node_reused: Set if the device-tree node is shared with an ancestor * device. + * @dma_coherent: this particular device is dma coherent, even if the + * architecture supports non-coherent devices. * * At the lowest level, every device in a Linux system is represented by an * instance of struct device. The device structure contains the information @@ -1016,6 +1018,11 @@ struct device { bool offline_disabled:1; bool offline:1; bool of_node_reused:1; +#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \ + defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \ + defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) + bool dma_coherent:1; +#endif }; static inline struct device *kobj_to_dev(struct kobject *kobj) diff --git a/include/linux/dma-noncoherent.h b/include/linux/dma-noncoherent.h index a0aa00cc909d..69630ec320be 100644 --- a/include/linux/dma-noncoherent.h +++ b/include/linux/dma-noncoherent.h @@ -4,6 +4,22 @@ #include +#ifdef CONFIG_ARCH_HAS_DMA_COHERENCE_H +#include +#elif defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \ + defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \ + defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) +static inline int dev_is_dma_coherent(struct device *dev) +{ + return dev->dma_coherent; +} +#else +static inline int dev_is_dma_coherent(struct device *dev) +{ + return true; +} +#endif /* CONFIG_ARCH_HAS_DMA_COHERENCE_H */ + void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs); void arch_dma_free(struct device *dev, size_t size, void *cpu_addr, diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index 9bd54304446f..040859ac2a56 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -13,6 +13,9 @@ config NEED_DMA_MAP_STATE config ARCH_DMA_ADDR_T_64BIT def_bool 64BIT || PHYS_ADDR_T_64BIT +config ARCH_HAS_DMA_COHERENCE_H + bool + config HAVE_GENERIC_DMA_COHERENT bool -- 2.18.0