From: Mark Salter <msalter-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Cc: linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-xtensa-PjhNF2WwrV/0Sa2dR60CXw@public.gmane.org,
Michal Simek <monstr-pSz03upnqPeHXe+LvDLADg@public.gmane.org>,
linux-snps-arc-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-c6x-dev-jPsnJVOj+W6hPH1hqNUYSQ@public.gmane.org,
linux-parisc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-sh-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-hexagon-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-m68k-cunTk1MwBs8S/qaLPR03pWD2FQJk+8+b@public.gmane.org,
openrisc-cunTk1MwBs9a3B2Vnqf2dGD2FQJk+8+b@public.gmane.org,
Greentime Hu <green.hu-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
linux-alpha-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
sparclinux-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
nios2-dev-g9ZBwUv/Ih/yUk5EbOjzuce+I+R0W71w@public.gmane.org,
Vincent Chen <deanbo422-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [Linux-c6x-dev] [PATCH 05/20] c6x: use generic dma_noncoherent_ops
Date: Mon, 14 May 2018 20:25:52 -0400 [thread overview]
Message-ID: <f3a126c511ca75869e3f21dc60364e6a89cda90b.camel@redhat.com> (raw)
In-Reply-To: <20180511075945.16548-6-hch-jcswGhMUV9g@public.gmane.org>
On Fri, 2018-05-11 at 09:59 +0200, Christoph Hellwig wrote:
> Switch to the generic noncoherent direct mapping implementation.
>
> Signed-off-by: Christoph Hellwig <hch-jcswGhMUV9g@public.gmane.org>
> ---
> arch/c6x/Kconfig | 3 +
> arch/c6x/include/asm/Kbuild | 1 +
> arch/c6x/include/asm/dma-mapping.h | 28 ------
> arch/c6x/include/asm/setup.h | 2 +
> arch/c6x/kernel/Makefile | 2 +-
> arch/c6x/kernel/dma.c | 138 -----------------------------
> arch/c6x/mm/dma-coherent.c | 40 ++++++++-
> 7 files changed, 44 insertions(+), 170 deletions(-)
> delete mode 100644 arch/c6x/include/asm/dma-mapping.h
> delete mode 100644 arch/c6x/kernel/dma.c
>
> diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig
> index 8c088b96e372..bf59855628ac 100644
> --- a/arch/c6x/Kconfig
> +++ b/arch/c6x/Kconfig
> @@ -6,7 +6,10 @@
>
> config C6X
> def_bool y
> + select ARCH_HAS_SYNC_DMA_FOR_CPU
> + select ARCH_HAS_SYNC_DMA_FOR_DEVICE
> select CLKDEV_LOOKUP
> + select DMA_NONCOHERENT_OPS
> select GENERIC_ATOMIC64
> select GENERIC_IRQ_SHOW
> select HAVE_ARCH_TRACEHOOK
> diff --git a/arch/c6x/include/asm/Kbuild b/arch/c6x/include/asm/Kbuild
> index fd4c840de837..434600e47662 100644
> --- a/arch/c6x/include/asm/Kbuild
> +++ b/arch/c6x/include/asm/Kbuild
> @@ -5,6 +5,7 @@ generic-y += current.h
> generic-y += device.h
> generic-y += div64.h
> generic-y += dma.h
> +generic-y += dma-mapping.h
> generic-y += emergency-restart.h
> generic-y += exec.h
> generic-y += extable.h
> diff --git a/arch/c6x/include/asm/dma-mapping.h b/arch/c6x/include/asm/dma-mapping.h
> deleted file mode 100644
> index 05daf1038111..000000000000
> --- a/arch/c6x/include/asm/dma-mapping.h
> +++ /dev/null
> @@ -1,28 +0,0 @@
> -/*
> - * Port on Texas Instruments TMS320C6x architecture
> - *
> - * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
> - * Author: Aurelien Jacquiot <aurelien.jacquiot-l0cyMroinI0@public.gmane.org>
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
> - */
> -#ifndef _ASM_C6X_DMA_MAPPING_H
> -#define _ASM_C6X_DMA_MAPPING_H
> -
> -extern const struct dma_map_ops c6x_dma_ops;
> -
> -static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
> -{
> - return &c6x_dma_ops;
> -}
> -
> -extern void coherent_mem_init(u32 start, u32 size);
> -void *c6x_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
> - gfp_t gfp, unsigned long attrs);
> -void c6x_dma_free(struct device *dev, size_t size, void *vaddr,
> - dma_addr_t dma_handle, unsigned long attrs);
> -
> -#endif /* _ASM_C6X_DMA_MAPPING_H */
> diff --git a/arch/c6x/include/asm/setup.h b/arch/c6x/include/asm/setup.h
> index 852afb209afb..350f34debb19 100644
> --- a/arch/c6x/include/asm/setup.h
> +++ b/arch/c6x/include/asm/setup.h
> @@ -28,5 +28,7 @@ extern unsigned char c6x_fuse_mac[6];
> extern void machine_init(unsigned long dt_ptr);
> extern void time_init(void);
>
> +extern void coherent_mem_init(u32 start, u32 size);
> +
> #endif /* !__ASSEMBLY__ */
> #endif /* _ASM_C6X_SETUP_H */
> diff --git a/arch/c6x/kernel/Makefile b/arch/c6x/kernel/Makefile
> index 02f340d7b8fe..fbe74174de87 100644
> --- a/arch/c6x/kernel/Makefile
> +++ b/arch/c6x/kernel/Makefile
> @@ -8,6 +8,6 @@ extra-y := head.o vmlinux.lds
> obj-y := process.o traps.o irq.o signal.o ptrace.o
> obj-y += setup.o sys_c6x.o time.o devicetree.o
> obj-y += switch_to.o entry.o vectors.o c6x_ksyms.o
> -obj-y += soc.o dma.o
> +obj-y += soc.o
>
> obj-$(CONFIG_MODULES) += module.o
> diff --git a/arch/c6x/kernel/dma.c b/arch/c6x/kernel/dma.c
> deleted file mode 100644
> index 31e1a9ec3a9c..000000000000
> --- a/arch/c6x/kernel/dma.c
> +++ /dev/null
> @@ -1,138 +0,0 @@
> -/*
> - * Copyright (C) 2011 Texas Instruments Incorporated
> - * Author: Mark Salter <msalter-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - */
> -#include <linux/module.h>
> -#include <linux/dma-mapping.h>
> -#include <linux/mm.h>
> -#include <linux/mm_types.h>
> -#include <linux/scatterlist.h>
> -
> -#include <asm/cacheflush.h>
> -
> -static void c6x_dma_sync(dma_addr_t handle, size_t size,
> - enum dma_data_direction dir)
> -{
> - unsigned long paddr = handle;
> -
> - BUG_ON(!valid_dma_direction(dir));
> -
> - switch (dir) {
> - case DMA_FROM_DEVICE:
> - L2_cache_block_invalidate(paddr, paddr + size);
> - break;
> - case DMA_TO_DEVICE:
> - L2_cache_block_writeback(paddr, paddr + size);
> - break;
> - case DMA_BIDIRECTIONAL:
> - L2_cache_block_writeback_invalidate(paddr, paddr + size);
> - break;
> - default:
> - break;
> - }
> -}
> -
> -static dma_addr_t c6x_dma_map_page(struct device *dev, struct page *page,
> - unsigned long offset, size_t size, enum dma_data_direction dir,
> - unsigned long attrs)
> -{
> - dma_addr_t handle = virt_to_phys(page_address(page) + offset);
> -
> - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
> - c6x_dma_sync(handle, size, dir);
> -
> - return handle;
> -}
> -
> -static void c6x_dma_unmap_page(struct device *dev, dma_addr_t handle,
> - size_t size, enum dma_data_direction dir, unsigned long attrs)
> -{
> - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
> - c6x_dma_sync(handle, size, dir);
> -}
> -
> -static int c6x_dma_map_sg(struct device *dev, struct scatterlist *sglist,
> - int nents, enum dma_data_direction dir, unsigned long attrs)
> -{
> - struct scatterlist *sg;
> - int i;
> -
> - for_each_sg(sglist, sg, nents, i) {
> - sg->dma_address = sg_phys(sg);
> - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
> - c6x_dma_sync(sg->dma_address, sg->length, dir);
> - }
> -
> - return nents;
> -}
> -
> -static void c6x_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
> - int nents, enum dma_data_direction dir, unsigned long attrs)
> -{
> - struct scatterlist *sg;
> - int i;
> -
> - if (attrs & DMA_ATTR_SKIP_CPU_SYNC)
> - return;
> -
> - for_each_sg(sglist, sg, nents, i)
> - c6x_dma_sync(sg_dma_address(sg), sg->length, dir);
> -}
> -
> -static void c6x_dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
> - size_t size, enum dma_data_direction dir)
> -{
> - c6x_dma_sync(handle, size, dir);
> -
> -}
> -
> -static void c6x_dma_sync_single_for_device(struct device *dev,
> - dma_addr_t handle, size_t size, enum dma_data_direction dir)
> -{
> - c6x_dma_sync(handle, size, dir);
> -
> -}
> -
> -static void c6x_dma_sync_sg_for_cpu(struct device *dev,
> - struct scatterlist *sglist, int nents,
> - enum dma_data_direction dir)
> -{
> - struct scatterlist *sg;
> - int i;
> -
> - for_each_sg(sglist, sg, nents, i)
> - c6x_dma_sync_single_for_cpu(dev, sg_dma_address(sg),
> - sg->length, dir);
> -
> -}
> -
> -static void c6x_dma_sync_sg_for_device(struct device *dev,
> - struct scatterlist *sglist, int nents,
> - enum dma_data_direction dir)
> -{
> - struct scatterlist *sg;
> - int i;
> -
> - for_each_sg(sglist, sg, nents, i)
> - c6x_dma_sync_single_for_device(dev, sg_dma_address(sg),
> - sg->length, dir);
> -
> -}
> -
> -const struct dma_map_ops c6x_dma_ops = {
> - .alloc = c6x_dma_alloc,
> - .free = c6x_dma_free,
> - .map_page = c6x_dma_map_page,
> - .unmap_page = c6x_dma_unmap_page,
> - .map_sg = c6x_dma_map_sg,
> - .unmap_sg = c6x_dma_unmap_sg,
> - .sync_single_for_device = c6x_dma_sync_single_for_device,
> - .sync_single_for_cpu = c6x_dma_sync_single_for_cpu,
> - .sync_sg_for_device = c6x_dma_sync_sg_for_device,
> - .sync_sg_for_cpu = c6x_dma_sync_sg_for_cpu,
> -};
> -EXPORT_SYMBOL(c6x_dma_ops);
> diff --git a/arch/c6x/mm/dma-coherent.c b/arch/c6x/mm/dma-coherent.c
> index 95e38ad27c69..d0a8e0c4b27e 100644
> --- a/arch/c6x/mm/dma-coherent.c
> +++ b/arch/c6x/mm/dma-coherent.c
> @@ -19,10 +19,12 @@
> #include <linux/bitops.h>
> #include <linux/module.h>
> #include <linux/interrupt.h>
> -#include <linux/dma-mapping.h>
> +#include <linux/dma-noncoherent.h>
> #include <linux/memblock.h>
>
> +#include <asm/cacheflush.h>
> #include <asm/page.h>
> +#include <asm/setup.h>
>
> /*
> * DMA coherent memory management, can be redefined using the memdma=
> @@ -73,7 +75,7 @@ static void __free_dma_pages(u32 addr, int order)
> * Allocate DMA coherent memory space and return both the kernel
> * virtual and DMA address for that space.
> */
> -void *c6x_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
> +void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
> gfp_t gfp, unsigned long attrs)
> {
> u32 paddr;
> @@ -98,7 +100,7 @@ void *c6x_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
> /*
> * Free DMA coherent memory as defined by the above mapping.
> */
> -void c6x_dma_free(struct device *dev, size_t size, void *vaddr,
> +void arch_dma_free(struct device *dev, size_t size, void *vaddr,
> dma_addr_t dma_handle, unsigned long attrs)
> {
> int order;
> @@ -139,3 +141,35 @@ void __init coherent_mem_init(phys_addr_t start, u32 size)
> dma_bitmap = phys_to_virt(bitmap_phys);
> memset(dma_bitmap, 0, dma_pages * PAGE_SIZE);
> }
> +
> +static void c6x_dma_sync(struct device *dev, phys_addr_t paddr, size_t size,
> + enum dma_data_direction dir)
> +{
> + BUG_ON(!valid_dma_direction(dir));
> +
> + switch (dir) {
> + case DMA_FROM_DEVICE:
> + L2_cache_block_invalidate(paddr, paddr + size);
> + break;
> + case DMA_TO_DEVICE:
> + L2_cache_block_writeback(paddr, paddr + size);
> + break;
> + case DMA_BIDIRECTIONAL:
> + L2_cache_block_writeback_invalidate(paddr, paddr + size);
> + break;
> + default:
> + break;
> + }
> +}
> +
> +void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr,
> + size_t size, enum dma_data_direction dir)
> +{
> + return c6x_dma_sync(dev, paddr, size, dir);
> +}
> +
> +void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr,
> + size_t size, enum dma_data_direction dir)
> +{
> + return c6x_dma_sync(dev, paddr, size, dir);
> +}
Acked-by: Mark Salter <msalter-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
WARNING: multiple messages have this Message-ID (diff)
From: Mark Salter <msalter@redhat.com>
To: Christoph Hellwig <hch@lst.de>, iommu@lists.linux-foundation.org
Cc: linux-arch@vger.kernel.org, linux-xtensa@linux-xtensa.org,
Michal Simek <monstr@monstr.eu>,
Vincent Chen <deanbo422@gmail.com>,
linux-c6x-dev@linux-c6x.org, linux-parisc@vger.kernel.org,
linux-sh@vger.kernel.org, linux-hexagon@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org,
openrisc@lists.librecores.org, Greentime Hu <green.hu@gmail.com>,
linux-alpha@vger.kernel.org, sparclinux@vger.kernel.org,
nios2-dev@lists.rocketboards.org,
linux-snps-arc@lists.infradead.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [Linux-c6x-dev] [PATCH 05/20] c6x: use generic dma_noncoherent_ops
Date: Mon, 14 May 2018 20:25:52 -0400 [thread overview]
Message-ID: <f3a126c511ca75869e3f21dc60364e6a89cda90b.camel@redhat.com> (raw)
Message-ID: <20180515002552.6rQpVx31bn8AaB-nfL4ISPYS0yQz462BgzQgxd18p_g@z> (raw)
In-Reply-To: <20180511075945.16548-6-hch@lst.de>
On Fri, 2018-05-11 at 09:59 +0200, Christoph Hellwig wrote:
> Switch to the generic noncoherent direct mapping implementation.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> arch/c6x/Kconfig | 3 +
> arch/c6x/include/asm/Kbuild | 1 +
> arch/c6x/include/asm/dma-mapping.h | 28 ------
> arch/c6x/include/asm/setup.h | 2 +
> arch/c6x/kernel/Makefile | 2 +-
> arch/c6x/kernel/dma.c | 138 -----------------------------
> arch/c6x/mm/dma-coherent.c | 40 ++++++++-
> 7 files changed, 44 insertions(+), 170 deletions(-)
> delete mode 100644 arch/c6x/include/asm/dma-mapping.h
> delete mode 100644 arch/c6x/kernel/dma.c
>
> diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig
> index 8c088b96e372..bf59855628ac 100644
> --- a/arch/c6x/Kconfig
> +++ b/arch/c6x/Kconfig
> @@ -6,7 +6,10 @@
>
> config C6X
> def_bool y
> + select ARCH_HAS_SYNC_DMA_FOR_CPU
> + select ARCH_HAS_SYNC_DMA_FOR_DEVICE
> select CLKDEV_LOOKUP
> + select DMA_NONCOHERENT_OPS
> select GENERIC_ATOMIC64
> select GENERIC_IRQ_SHOW
> select HAVE_ARCH_TRACEHOOK
> diff --git a/arch/c6x/include/asm/Kbuild b/arch/c6x/include/asm/Kbuild
> index fd4c840de837..434600e47662 100644
> --- a/arch/c6x/include/asm/Kbuild
> +++ b/arch/c6x/include/asm/Kbuild
> @@ -5,6 +5,7 @@ generic-y += current.h
> generic-y += device.h
> generic-y += div64.h
> generic-y += dma.h
> +generic-y += dma-mapping.h
> generic-y += emergency-restart.h
> generic-y += exec.h
> generic-y += extable.h
> diff --git a/arch/c6x/include/asm/dma-mapping.h b/arch/c6x/include/asm/dma-mapping.h
> deleted file mode 100644
> index 05daf1038111..000000000000
> --- a/arch/c6x/include/asm/dma-mapping.h
> +++ /dev/null
> @@ -1,28 +0,0 @@
> -/*
> - * Port on Texas Instruments TMS320C6x architecture
> - *
> - * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
> - * Author: Aurelien Jacquiot <aurelien.jacquiot@ti.com>
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - *
> - */
> -#ifndef _ASM_C6X_DMA_MAPPING_H
> -#define _ASM_C6X_DMA_MAPPING_H
> -
> -extern const struct dma_map_ops c6x_dma_ops;
> -
> -static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
> -{
> - return &c6x_dma_ops;
> -}
> -
> -extern void coherent_mem_init(u32 start, u32 size);
> -void *c6x_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
> - gfp_t gfp, unsigned long attrs);
> -void c6x_dma_free(struct device *dev, size_t size, void *vaddr,
> - dma_addr_t dma_handle, unsigned long attrs);
> -
> -#endif /* _ASM_C6X_DMA_MAPPING_H */
> diff --git a/arch/c6x/include/asm/setup.h b/arch/c6x/include/asm/setup.h
> index 852afb209afb..350f34debb19 100644
> --- a/arch/c6x/include/asm/setup.h
> +++ b/arch/c6x/include/asm/setup.h
> @@ -28,5 +28,7 @@ extern unsigned char c6x_fuse_mac[6];
> extern void machine_init(unsigned long dt_ptr);
> extern void time_init(void);
>
> +extern void coherent_mem_init(u32 start, u32 size);
> +
> #endif /* !__ASSEMBLY__ */
> #endif /* _ASM_C6X_SETUP_H */
> diff --git a/arch/c6x/kernel/Makefile b/arch/c6x/kernel/Makefile
> index 02f340d7b8fe..fbe74174de87 100644
> --- a/arch/c6x/kernel/Makefile
> +++ b/arch/c6x/kernel/Makefile
> @@ -8,6 +8,6 @@ extra-y := head.o vmlinux.lds
> obj-y := process.o traps.o irq.o signal.o ptrace.o
> obj-y += setup.o sys_c6x.o time.o devicetree.o
> obj-y += switch_to.o entry.o vectors.o c6x_ksyms.o
> -obj-y += soc.o dma.o
> +obj-y += soc.o
>
> obj-$(CONFIG_MODULES) += module.o
> diff --git a/arch/c6x/kernel/dma.c b/arch/c6x/kernel/dma.c
> deleted file mode 100644
> index 31e1a9ec3a9c..000000000000
> --- a/arch/c6x/kernel/dma.c
> +++ /dev/null
> @@ -1,138 +0,0 @@
> -/*
> - * Copyright (C) 2011 Texas Instruments Incorporated
> - * Author: Mark Salter <msalter@redhat.com>
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License version 2 as
> - * published by the Free Software Foundation.
> - */
> -#include <linux/module.h>
> -#include <linux/dma-mapping.h>
> -#include <linux/mm.h>
> -#include <linux/mm_types.h>
> -#include <linux/scatterlist.h>
> -
> -#include <asm/cacheflush.h>
> -
> -static void c6x_dma_sync(dma_addr_t handle, size_t size,
> - enum dma_data_direction dir)
> -{
> - unsigned long paddr = handle;
> -
> - BUG_ON(!valid_dma_direction(dir));
> -
> - switch (dir) {
> - case DMA_FROM_DEVICE:
> - L2_cache_block_invalidate(paddr, paddr + size);
> - break;
> - case DMA_TO_DEVICE:
> - L2_cache_block_writeback(paddr, paddr + size);
> - break;
> - case DMA_BIDIRECTIONAL:
> - L2_cache_block_writeback_invalidate(paddr, paddr + size);
> - break;
> - default:
> - break;
> - }
> -}
> -
> -static dma_addr_t c6x_dma_map_page(struct device *dev, struct page *page,
> - unsigned long offset, size_t size, enum dma_data_direction dir,
> - unsigned long attrs)
> -{
> - dma_addr_t handle = virt_to_phys(page_address(page) + offset);
> -
> - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
> - c6x_dma_sync(handle, size, dir);
> -
> - return handle;
> -}
> -
> -static void c6x_dma_unmap_page(struct device *dev, dma_addr_t handle,
> - size_t size, enum dma_data_direction dir, unsigned long attrs)
> -{
> - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
> - c6x_dma_sync(handle, size, dir);
> -}
> -
> -static int c6x_dma_map_sg(struct device *dev, struct scatterlist *sglist,
> - int nents, enum dma_data_direction dir, unsigned long attrs)
> -{
> - struct scatterlist *sg;
> - int i;
> -
> - for_each_sg(sglist, sg, nents, i) {
> - sg->dma_address = sg_phys(sg);
> - if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
> - c6x_dma_sync(sg->dma_address, sg->length, dir);
> - }
> -
> - return nents;
> -}
> -
> -static void c6x_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
> - int nents, enum dma_data_direction dir, unsigned long attrs)
> -{
> - struct scatterlist *sg;
> - int i;
> -
> - if (attrs & DMA_ATTR_SKIP_CPU_SYNC)
> - return;
> -
> - for_each_sg(sglist, sg, nents, i)
> - c6x_dma_sync(sg_dma_address(sg), sg->length, dir);
> -}
> -
> -static void c6x_dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
> - size_t size, enum dma_data_direction dir)
> -{
> - c6x_dma_sync(handle, size, dir);
> -
> -}
> -
> -static void c6x_dma_sync_single_for_device(struct device *dev,
> - dma_addr_t handle, size_t size, enum dma_data_direction dir)
> -{
> - c6x_dma_sync(handle, size, dir);
> -
> -}
> -
> -static void c6x_dma_sync_sg_for_cpu(struct device *dev,
> - struct scatterlist *sglist, int nents,
> - enum dma_data_direction dir)
> -{
> - struct scatterlist *sg;
> - int i;
> -
> - for_each_sg(sglist, sg, nents, i)
> - c6x_dma_sync_single_for_cpu(dev, sg_dma_address(sg),
> - sg->length, dir);
> -
> -}
> -
> -static void c6x_dma_sync_sg_for_device(struct device *dev,
> - struct scatterlist *sglist, int nents,
> - enum dma_data_direction dir)
> -{
> - struct scatterlist *sg;
> - int i;
> -
> - for_each_sg(sglist, sg, nents, i)
> - c6x_dma_sync_single_for_device(dev, sg_dma_address(sg),
> - sg->length, dir);
> -
> -}
> -
> -const struct dma_map_ops c6x_dma_ops = {
> - .alloc = c6x_dma_alloc,
> - .free = c6x_dma_free,
> - .map_page = c6x_dma_map_page,
> - .unmap_page = c6x_dma_unmap_page,
> - .map_sg = c6x_dma_map_sg,
> - .unmap_sg = c6x_dma_unmap_sg,
> - .sync_single_for_device = c6x_dma_sync_single_for_device,
> - .sync_single_for_cpu = c6x_dma_sync_single_for_cpu,
> - .sync_sg_for_device = c6x_dma_sync_sg_for_device,
> - .sync_sg_for_cpu = c6x_dma_sync_sg_for_cpu,
> -};
> -EXPORT_SYMBOL(c6x_dma_ops);
> diff --git a/arch/c6x/mm/dma-coherent.c b/arch/c6x/mm/dma-coherent.c
> index 95e38ad27c69..d0a8e0c4b27e 100644
> --- a/arch/c6x/mm/dma-coherent.c
> +++ b/arch/c6x/mm/dma-coherent.c
> @@ -19,10 +19,12 @@
> #include <linux/bitops.h>
> #include <linux/module.h>
> #include <linux/interrupt.h>
> -#include <linux/dma-mapping.h>
> +#include <linux/dma-noncoherent.h>
> #include <linux/memblock.h>
>
> +#include <asm/cacheflush.h>
> #include <asm/page.h>
> +#include <asm/setup.h>
>
> /*
> * DMA coherent memory management, can be redefined using the memdma=
> @@ -73,7 +75,7 @@ static void __free_dma_pages(u32 addr, int order)
> * Allocate DMA coherent memory space and return both the kernel
> * virtual and DMA address for that space.
> */
> -void *c6x_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
> +void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
> gfp_t gfp, unsigned long attrs)
> {
> u32 paddr;
> @@ -98,7 +100,7 @@ void *c6x_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle,
> /*
> * Free DMA coherent memory as defined by the above mapping.
> */
> -void c6x_dma_free(struct device *dev, size_t size, void *vaddr,
> +void arch_dma_free(struct device *dev, size_t size, void *vaddr,
> dma_addr_t dma_handle, unsigned long attrs)
> {
> int order;
> @@ -139,3 +141,35 @@ void __init coherent_mem_init(phys_addr_t start, u32 size)
> dma_bitmap = phys_to_virt(bitmap_phys);
> memset(dma_bitmap, 0, dma_pages * PAGE_SIZE);
> }
> +
> +static void c6x_dma_sync(struct device *dev, phys_addr_t paddr, size_t size,
> + enum dma_data_direction dir)
> +{
> + BUG_ON(!valid_dma_direction(dir));
> +
> + switch (dir) {
> + case DMA_FROM_DEVICE:
> + L2_cache_block_invalidate(paddr, paddr + size);
> + break;
> + case DMA_TO_DEVICE:
> + L2_cache_block_writeback(paddr, paddr + size);
> + break;
> + case DMA_BIDIRECTIONAL:
> + L2_cache_block_writeback_invalidate(paddr, paddr + size);
> + break;
> + default:
> + break;
> + }
> +}
> +
> +void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr,
> + size_t size, enum dma_data_direction dir)
> +{
> + return c6x_dma_sync(dev, paddr, size, dir);
> +}
> +
> +void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr,
> + size_t size, enum dma_data_direction dir)
> +{
> + return c6x_dma_sync(dev, paddr, size, dir);
> +}
Acked-by: Mark Salter <msalter@redhat.com>
next prev parent reply other threads:[~2018-05-15 0:25 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-11 7:59 common non-cache coherent direct dma mapping ops Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-11 7:59 ` [PATCH 01/20] dma-mapping: simplify Kconfig dependencies Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
[not found] ` <20180511075945.16548-1-hch-jcswGhMUV9g@public.gmane.org>
2018-05-11 7:59 ` [PATCH 02/20] dma-mapping: provide a generic dma-noncoherent implementation Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
[not found] ` <20180511075945.16548-3-hch-jcswGhMUV9g@public.gmane.org>
2018-05-18 13:03 ` Alexey Brodkin
2018-05-18 13:03 ` Alexey Brodkin
[not found] ` <bad125dff49f6e49c895e818c9d1abb346a46e8e.camel-HKixBCOQz3hWk0Htik3J/w@public.gmane.org>
2018-05-18 13:27 ` hch-jcswGhMUV9g
2018-05-18 13:27 ` hch
[not found] ` <20180518132731.GA31125-jcswGhMUV9g@public.gmane.org>
2018-05-18 14:13 ` Alexey Brodkin
2018-05-18 14:13 ` Alexey Brodkin
2018-05-18 17:28 ` Vineet Gupta
2018-05-18 17:28 ` Vineet Gupta
2018-05-18 17:20 ` dma_sync_*_for_cpu and direction=TO_DEVICE (was Re: [PATCH 02/20] dma-mapping: provide a generic dma-noncoherent implementation) Vineet Gupta
2018-05-18 17:20 ` Vineet Gupta
2018-05-18 17:50 ` Russell King - ARM Linux
2018-05-18 17:50 ` Russell King - ARM Linux
[not found] ` <20180518175004.GF17671-l+eeeJia6m9URfEZ8mYm6t73F7V6hmMc@public.gmane.org>
2018-05-18 19:57 ` Alexey Brodkin
2018-05-18 19:57 ` Alexey Brodkin
[not found] ` <182840dedb4890a88c672b1c5d556920bf89a8fb.camel-HKixBCOQz3hWk0Htik3J/w@public.gmane.org>
2018-05-18 21:33 ` Russell King - ARM Linux
2018-05-18 21:33 ` Russell King - ARM Linux
2018-05-18 20:35 ` Vineet Gupta
2018-05-18 20:35 ` Vineet Gupta
2018-05-18 21:55 ` Russell King - ARM Linux
2018-05-18 21:55 ` Russell King - ARM Linux
2018-05-18 20:05 ` [PATCH 02/20] dma-mapping: provide a generic dma-noncoherent implementation Helge Deller
2018-05-18 20:05 ` Helge Deller
[not found] ` <0c5d27e9-2799-eb38-8b09-47a04c48b5c7-Mmb7MZpHnFY@public.gmane.org>
2018-05-19 6:38 ` hch-jcswGhMUV9g
2018-05-19 6:38 ` hch
2018-05-11 7:59 ` [PATCH 03/20] arc: use generic dma_noncoherent_ops Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
[not found] ` <20180511075945.16548-4-hch-jcswGhMUV9g@public.gmane.org>
2018-05-11 12:44 ` Alexey Brodkin
2018-05-11 12:44 ` Alexey Brodkin
2018-05-11 7:59 ` [PATCH 04/20] arm-nommu: " Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
[not found] ` <20180511075945.16548-5-hch-jcswGhMUV9g@public.gmane.org>
2018-05-11 9:11 ` Russell King - ARM Linux
2018-05-11 9:11 ` Russell King - ARM Linux
[not found] ` <20180511091114.GA16141-l+eeeJia6m9URfEZ8mYm6t73F7V6hmMc@public.gmane.org>
2018-05-22 11:53 ` Christoph Hellwig
2018-05-22 11:53 ` Christoph Hellwig
2018-05-11 13:56 ` John Garry
2018-05-11 13:56 ` John Garry
2018-05-11 7:59 ` [PATCH 05/20] c6x: " Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
[not found] ` <20180511075945.16548-6-hch-jcswGhMUV9g@public.gmane.org>
2018-05-15 0:25 ` Mark Salter [this message]
2018-05-15 0:25 ` [Linux-c6x-dev] " Mark Salter
2018-05-11 7:59 ` [PATCH 06/20] hexagon: " Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-11 7:59 ` [PATCH 07/20] m68k: " Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-11 7:59 ` [PATCH 08/20] microblaze: " Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-11 7:59 ` [PATCH 09/20] microblaze: remove the consistent_sync and consistent_sync_page Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-11 7:59 ` [PATCH 10/20] nds32: use generic dma_noncoherent_ops Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-11 7:59 ` [PATCH 11/20] nios2: " Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-11 7:59 ` [PATCH 12/20] openrisc: " Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-11 7:59 ` [PATCH 13/20] sh: simplify get_arch_dma_ops Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-11 7:59 ` [PATCH 14/20] sh: introduce a sh_cacheop_vaddr helper Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-11 7:59 ` [PATCH 15/20] sh: use dma_direct_ops for the CONFIG_DMA_COHERENT case Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-11 7:59 ` [PATCH 16/20] mm: split arch/sh/mm/consistent.c Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-11 7:59 ` [PATCH 17/20] sh: use generic dma_noncoherent_ops Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-11 7:59 ` [PATCH 18/20] xtensa: " Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-11 7:59 ` [PATCH 19/20] sparc: " Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-11 7:59 ` [PATCH 20/20] parisc: " Christoph Hellwig
2018-05-11 7:59 ` Christoph Hellwig
2018-05-13 13:26 ` common non-cache coherent direct dma mapping ops Helge Deller
2018-05-13 13:26 ` Helge Deller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=f3a126c511ca75869e3f21dc60364e6a89cda90b.camel@redhat.com \
--to=msalter-h+wxahxf7alqt0dzr+alfa@public.gmane.org \
--cc=deanbo422-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=green.hu-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=hch-jcswGhMUV9g@public.gmane.org \
--cc=iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org \
--cc=linux-alpha-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org \
--cc=linux-c6x-dev-jPsnJVOj+W6hPH1hqNUYSQ@public.gmane.org \
--cc=linux-hexagon-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-m68k-cunTk1MwBs8S/qaLPR03pWD2FQJk+8+b@public.gmane.org \
--cc=linux-parisc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-sh-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-snps-arc-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org \
--cc=linux-xtensa-PjhNF2WwrV/0Sa2dR60CXw@public.gmane.org \
--cc=monstr-pSz03upnqPeHXe+LvDLADg@public.gmane.org \
--cc=nios2-dev-g9ZBwUv/Ih/yUk5EbOjzuce+I+R0W71w@public.gmane.org \
--cc=openrisc-cunTk1MwBs9a3B2Vnqf2dGD2FQJk+8+b@public.gmane.org \
--cc=sparclinux-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).