From: Stefano Stabellini <sstabellini@kernel.org> To: jgross@suse.com, boris.ostrovsky@oracle.com, konrad.wilk@oracle.com Cc: sstabellini@kernel.org, xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, tamas@tklengyel.com, roman@zededa.com, Stefano Stabellini <stefano.stabellini@xilinx.com> Subject: [PATCH v2 10/11] xen/arm: introduce phys/dma translations in xen_dma_sync_for_* Date: Wed, 3 Jun 2020 15:22:46 -0700 [thread overview] Message-ID: <20200603222247.11681-10-sstabellini@kernel.org> (raw) In-Reply-To: <alpine.DEB.2.21.2006031506590.6774@sstabellini-ThinkPad-T480s> From: Stefano Stabellini <stefano.stabellini@xilinx.com> xen_dma_sync_for_cpu, xen_dma_sync_for_device, xen_arch_need_swiotlb are getting called passing dma addresses. On some platforms dma addresses could be different from physical addresses. Before doing any operations on these addresses we need to convert them back to physical addresses using dma_to_phys. Add dma_to_phys calls to xen_dma_sync_for_cpu, xen_dma_sync_for_device, and xen_arch_need_swiotlb. dma_cache_maint is fixed by the next patch. Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com> Tested-by: Corey Minyard <cminyard@mvista.com> Tested-by: Roman Shaposhnik <roman@zededa.com> --- Changes in v2: - improve commit message - don't use pfn_valid --- arch/arm/xen/mm.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c index f2414ea40a79..bbad712a890d 100644 --- a/arch/arm/xen/mm.c +++ b/arch/arm/xen/mm.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-only #include <linux/cpu.h> +#include <linux/dma-direct.h> #include <linux/dma-noncoherent.h> #include <linux/gfp.h> #include <linux/highmem.h> @@ -75,7 +76,7 @@ void xen_dma_sync_for_cpu(struct device *dev, dma_addr_t handle, phys_addr_t paddr, size_t size, enum dma_data_direction dir) { - if (pfn_valid(PFN_DOWN(handle))) + if (pfn_valid(PFN_DOWN(dma_to_phys(dev, handle)))) arch_sync_dma_for_cpu(paddr, size, dir); else if (dir != DMA_TO_DEVICE) dma_cache_maint(handle, size, GNTTAB_CACHE_INVAL); @@ -85,7 +86,7 @@ void xen_dma_sync_for_device(struct device *dev, dma_addr_t handle, phys_addr_t paddr, size_t size, enum dma_data_direction dir) { - if (pfn_valid(PFN_DOWN(handle))) + if (pfn_valid(PFN_DOWN(dma_to_phys(dev, handle)))) arch_sync_dma_for_device(paddr, size, dir); else if (dir == DMA_FROM_DEVICE) dma_cache_maint(handle, size, GNTTAB_CACHE_INVAL); @@ -98,7 +99,7 @@ bool xen_arch_need_swiotlb(struct device *dev, dma_addr_t dev_addr) { unsigned int xen_pfn = XEN_PFN_DOWN(phys); - unsigned int bfn = XEN_PFN_DOWN(dev_addr); + unsigned int bfn = XEN_PFN_DOWN(dma_to_phys(dev, dev_addr)); /* * The swiotlb buffer should be used if -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Stefano Stabellini <sstabellini@kernel.org> To: jgross@suse.com, boris.ostrovsky@oracle.com, konrad.wilk@oracle.com Cc: sstabellini@kernel.org, roman@zededa.com, linux-kernel@vger.kernel.org, tamas@tklengyel.com, xen-devel@lists.xenproject.org, Stefano Stabellini <stefano.stabellini@xilinx.com> Subject: [PATCH v2 10/11] xen/arm: introduce phys/dma translations in xen_dma_sync_for_* Date: Wed, 3 Jun 2020 15:22:46 -0700 [thread overview] Message-ID: <20200603222247.11681-10-sstabellini@kernel.org> (raw) In-Reply-To: <alpine.DEB.2.21.2006031506590.6774@sstabellini-ThinkPad-T480s> From: Stefano Stabellini <stefano.stabellini@xilinx.com> xen_dma_sync_for_cpu, xen_dma_sync_for_device, xen_arch_need_swiotlb are getting called passing dma addresses. On some platforms dma addresses could be different from physical addresses. Before doing any operations on these addresses we need to convert them back to physical addresses using dma_to_phys. Add dma_to_phys calls to xen_dma_sync_for_cpu, xen_dma_sync_for_device, and xen_arch_need_swiotlb. dma_cache_maint is fixed by the next patch. Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com> Tested-by: Corey Minyard <cminyard@mvista.com> Tested-by: Roman Shaposhnik <roman@zededa.com> --- Changes in v2: - improve commit message - don't use pfn_valid --- arch/arm/xen/mm.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c index f2414ea40a79..bbad712a890d 100644 --- a/arch/arm/xen/mm.c +++ b/arch/arm/xen/mm.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-only #include <linux/cpu.h> +#include <linux/dma-direct.h> #include <linux/dma-noncoherent.h> #include <linux/gfp.h> #include <linux/highmem.h> @@ -75,7 +76,7 @@ void xen_dma_sync_for_cpu(struct device *dev, dma_addr_t handle, phys_addr_t paddr, size_t size, enum dma_data_direction dir) { - if (pfn_valid(PFN_DOWN(handle))) + if (pfn_valid(PFN_DOWN(dma_to_phys(dev, handle)))) arch_sync_dma_for_cpu(paddr, size, dir); else if (dir != DMA_TO_DEVICE) dma_cache_maint(handle, size, GNTTAB_CACHE_INVAL); @@ -85,7 +86,7 @@ void xen_dma_sync_for_device(struct device *dev, dma_addr_t handle, phys_addr_t paddr, size_t size, enum dma_data_direction dir) { - if (pfn_valid(PFN_DOWN(handle))) + if (pfn_valid(PFN_DOWN(dma_to_phys(dev, handle)))) arch_sync_dma_for_device(paddr, size, dir); else if (dir == DMA_FROM_DEVICE) dma_cache_maint(handle, size, GNTTAB_CACHE_INVAL); @@ -98,7 +99,7 @@ bool xen_arch_need_swiotlb(struct device *dev, dma_addr_t dev_addr) { unsigned int xen_pfn = XEN_PFN_DOWN(phys); - unsigned int bfn = XEN_PFN_DOWN(dev_addr); + unsigned int bfn = XEN_PFN_DOWN(dma_to_phys(dev, dev_addr)); /* * The swiotlb buffer should be used if -- 2.17.1
next prev parent reply other threads:[~2020-06-03 22:23 UTC|newest] Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-06-03 22:22 [PATCH v2 00/11] fix swiotlb-xen for RPi4 Stefano Stabellini 2020-06-03 22:22 ` Stefano Stabellini 2020-06-03 22:22 ` [PATCH v2 01/11] swiotlb-xen: use vmalloc_to_page on vmalloc virt addresses Stefano Stabellini 2020-06-03 22:22 ` Stefano Stabellini 2020-06-08 7:04 ` Christoph Hellwig 2020-06-08 7:04 ` Christoph Hellwig 2020-06-08 22:53 ` Stefano Stabellini 2020-06-08 22:53 ` Stefano Stabellini 2020-06-03 22:22 ` [PATCH v2 02/11] swiotlb-xen: remove start_dma_addr Stefano Stabellini 2020-06-03 22:22 ` Stefano Stabellini 2020-06-03 22:22 ` [PATCH v2 03/11] swiotlb-xen: add struct device* parameter to xen_phys_to_bus Stefano Stabellini 2020-06-03 22:22 ` Stefano Stabellini 2020-06-08 7:05 ` Christoph Hellwig 2020-06-08 7:05 ` Christoph Hellwig 2020-06-08 22:55 ` Stefano Stabellini 2020-06-08 22:55 ` Stefano Stabellini 2020-06-03 22:22 ` [PATCH v2 04/11] swiotlb-xen: add struct device* parameter to xen_bus_to_phys Stefano Stabellini 2020-06-03 22:22 ` Stefano Stabellini 2020-06-08 7:05 ` Christoph Hellwig 2020-06-08 7:05 ` Christoph Hellwig 2020-06-03 22:22 ` [PATCH v2 05/11] swiotlb-xen: add struct device* parameter to xen_dma_sync_for_cpu Stefano Stabellini 2020-06-03 22:22 ` Stefano Stabellini 2020-06-03 22:22 ` [PATCH v2 06/11] swiotlb-xen: add struct device* parameter to xen_dma_sync_for_device Stefano Stabellini 2020-06-03 22:22 ` Stefano Stabellini 2020-06-03 22:22 ` [PATCH v2 07/11] swiotlb-xen: add struct device* parameter to is_xen_swiotlb_buffer Stefano Stabellini 2020-06-03 22:22 ` Stefano Stabellini 2020-06-03 22:22 ` [PATCH v2 08/11] swiotlb-xen: introduce phys_to_dma/dma_to_phys translations Stefano Stabellini 2020-06-03 22:22 ` Stefano Stabellini 2020-06-04 17:46 ` Boris Ostrovsky 2020-06-04 17:46 ` Boris Ostrovsky 2020-06-04 17:47 ` boris.ostrovsky 2020-06-04 17:47 ` boris.ostrovsky 2020-06-08 7:08 ` Christoph Hellwig 2020-06-08 7:08 ` Christoph Hellwig 2020-06-08 23:06 ` Stefano Stabellini 2020-06-08 23:06 ` Stefano Stabellini 2020-06-09 3:46 ` Stefano Stabellini 2020-06-09 3:46 ` Stefano Stabellini 2020-06-09 5:32 ` Christoph Hellwig 2020-06-09 5:32 ` Christoph Hellwig 2020-06-09 21:50 ` Stefano Stabellini 2020-06-09 21:50 ` Stefano Stabellini 2020-06-03 22:22 ` [PATCH v2 09/11] swiotlb-xen: rename xen_phys_to_bus to xen_phys_to_dma and xen_bus_to_phys to xen_dma_to_phys Stefano Stabellini 2020-06-03 22:22 ` Stefano Stabellini 2020-06-08 7:09 ` Christoph Hellwig 2020-06-08 7:09 ` Christoph Hellwig 2020-06-03 22:22 ` Stefano Stabellini [this message] 2020-06-03 22:22 ` [PATCH v2 10/11] xen/arm: introduce phys/dma translations in xen_dma_sync_for_* Stefano Stabellini 2020-06-08 7:12 ` Christoph Hellwig 2020-06-08 7:12 ` Christoph Hellwig 2020-06-09 0:38 ` Stefano Stabellini 2020-06-09 0:38 ` Stefano Stabellini 2020-06-09 5:38 ` Christoph Hellwig 2020-06-09 5:38 ` Christoph Hellwig 2020-06-09 5:39 ` Christoph Hellwig 2020-06-09 5:39 ` Christoph Hellwig 2020-06-09 21:50 ` Stefano Stabellini 2020-06-09 21:50 ` Stefano Stabellini 2020-06-03 22:22 ` [PATCH v2 11/11] xen/arm: call dma_to_phys on the dma_addr_t parameter of dma_cache_maint Stefano Stabellini 2020-06-03 22:22 ` Stefano Stabellini 2020-06-04 18:32 ` [PATCH v2 00/11] fix swiotlb-xen for RPi4 Boris Ostrovsky 2020-06-04 18:32 ` Boris Ostrovsky
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