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Message-ID: <alpine.DEB.2.21.2106171445110.24906@sstabellini-ThinkPad-T480s>
Date: Thu, 17 Jun 2021 16:30:55 -0700 (PDT)
From: Stefano Stabellini <sstabellini@...nel.org>
To: Claire Chang <tientzu@...omium.org>
cc: Rob Herring <robh+dt@...nel.org>, mpe@...erman.id.au,
Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
Frank Rowand <frowand.list@...il.com>,
Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
boris.ostrovsky@...cle.com, jgross@...e.com,
Christoph Hellwig <hch@....de>,
Marek Szyprowski <m.szyprowski@...sung.com>,
benh@...nel.crashing.org, paulus@...ba.org,
"list@....net:IOMMU DRIVERS" <iommu@...ts.linux-foundation.org>,
sstabellini@...nel.org, Robin Murphy <robin.murphy@....com>,
grant.likely@....com, xypron.glpk@....de,
Thierry Reding <treding@...dia.com>, mingo@...nel.org,
bauerman@...ux.ibm.com, peterz@...radead.org,
Greg KH <gregkh@...uxfoundation.org>,
Saravana Kannan <saravanak@...gle.com>,
"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
heikki.krogerus@...ux.intel.com,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Randy Dunlap <rdunlap@...radead.org>,
Dan Williams <dan.j.williams@...el.com>,
Bartosz Golaszewski <bgolaszewski@...libre.com>,
linux-devicetree <devicetree@...r.kernel.org>,
lkml <linux-kernel@...r.kernel.org>,
linuxppc-dev@...ts.ozlabs.org, xen-devel@...ts.xenproject.org,
Nicolas Boichat <drinkcat@...omium.org>,
Jim Quinlan <james.quinlan@...adcom.com>, tfiga@...omium.org,
bskeggs@...hat.com, bhelgaas@...gle.com, chris@...is-wilson.co.uk,
daniel@...ll.ch, airlied@...ux.ie, dri-devel@...ts.freedesktop.org,
intel-gfx@...ts.freedesktop.org, jani.nikula@...ux.intel.com,
jxgao@...gle.com, joonas.lahtinen@...ux.intel.com,
linux-pci@...r.kernel.org, maarten.lankhorst@...ux.intel.com,
matthew.auld@...el.com, rodrigo.vivi@...el.com,
thomas.hellstrom@...ux.intel.com
Subject: Re: [PATCH v13 04/12] swiotlb: Update is_swiotlb_buffer to add a
struct device argument
On Thu, 17 Jun 2021, Claire Chang wrote:
> Update is_swiotlb_buffer to add a struct device argument. This will be
> useful later to allow for different pools.
>
> Signed-off-by: Claire Chang <tientzu@...omium.org>
> Reviewed-by: Christoph Hellwig <hch@....de>
> Tested-by: Stefano Stabellini <sstabellini@...nel.org>
> Tested-by: Will Deacon <will@...nel.org>
Acked-by: Stefano Stabellini <sstabellini@...nel.org>
> ---
> drivers/iommu/dma-iommu.c | 12 ++++++------
> drivers/xen/swiotlb-xen.c | 2 +-
> include/linux/swiotlb.h | 7 ++++---
> kernel/dma/direct.c | 6 +++---
> kernel/dma/direct.h | 6 +++---
> 5 files changed, 17 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
> index 3087d9fa6065..10997ef541f8 100644
> --- a/drivers/iommu/dma-iommu.c
> +++ b/drivers/iommu/dma-iommu.c
> @@ -507,7 +507,7 @@ static void __iommu_dma_unmap_swiotlb(struct device *dev, dma_addr_t dma_addr,
>
> __iommu_dma_unmap(dev, dma_addr, size);
>
> - if (unlikely(is_swiotlb_buffer(phys)))
> + if (unlikely(is_swiotlb_buffer(dev, phys)))
> swiotlb_tbl_unmap_single(dev, phys, size, dir, attrs);
> }
>
> @@ -578,7 +578,7 @@ static dma_addr_t __iommu_dma_map_swiotlb(struct device *dev, phys_addr_t phys,
> }
>
> iova = __iommu_dma_map(dev, phys, aligned_size, prot, dma_mask);
> - if (iova == DMA_MAPPING_ERROR && is_swiotlb_buffer(phys))
> + if (iova == DMA_MAPPING_ERROR && is_swiotlb_buffer(dev, phys))
> swiotlb_tbl_unmap_single(dev, phys, org_size, dir, attrs);
> return iova;
> }
> @@ -749,7 +749,7 @@ static void iommu_dma_sync_single_for_cpu(struct device *dev,
> if (!dev_is_dma_coherent(dev))
> arch_sync_dma_for_cpu(phys, size, dir);
>
> - if (is_swiotlb_buffer(phys))
> + if (is_swiotlb_buffer(dev, phys))
> swiotlb_sync_single_for_cpu(dev, phys, size, dir);
> }
>
> @@ -762,7 +762,7 @@ static void iommu_dma_sync_single_for_device(struct device *dev,
> return;
>
> phys = iommu_iova_to_phys(iommu_get_dma_domain(dev), dma_handle);
> - if (is_swiotlb_buffer(phys))
> + if (is_swiotlb_buffer(dev, phys))
> swiotlb_sync_single_for_device(dev, phys, size, dir);
>
> if (!dev_is_dma_coherent(dev))
> @@ -783,7 +783,7 @@ static void iommu_dma_sync_sg_for_cpu(struct device *dev,
> if (!dev_is_dma_coherent(dev))
> arch_sync_dma_for_cpu(sg_phys(sg), sg->length, dir);
>
> - if (is_swiotlb_buffer(sg_phys(sg)))
> + if (is_swiotlb_buffer(dev, sg_phys(sg)))
> swiotlb_sync_single_for_cpu(dev, sg_phys(sg),
> sg->length, dir);
> }
> @@ -800,7 +800,7 @@ static void iommu_dma_sync_sg_for_device(struct device *dev,
> return;
>
> for_each_sg(sgl, sg, nelems, i) {
> - if (is_swiotlb_buffer(sg_phys(sg)))
> + if (is_swiotlb_buffer(dev, sg_phys(sg)))
> swiotlb_sync_single_for_device(dev, sg_phys(sg),
> sg->length, dir);
>
> diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
> index 4c89afc0df62..0c6ed09f8513 100644
> --- a/drivers/xen/swiotlb-xen.c
> +++ b/drivers/xen/swiotlb-xen.c
> @@ -100,7 +100,7 @@ static int is_xen_swiotlb_buffer(struct device *dev, dma_addr_t dma_addr)
> * in our domain. Therefore _only_ check address within our domain.
> */
> if (pfn_valid(PFN_DOWN(paddr)))
> - return is_swiotlb_buffer(paddr);
> + return is_swiotlb_buffer(dev, paddr);
> return 0;
> }
>
> diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
> index 216854a5e513..d1f3d95881cd 100644
> --- a/include/linux/swiotlb.h
> +++ b/include/linux/swiotlb.h
> @@ -2,6 +2,7 @@
> #ifndef __LINUX_SWIOTLB_H
> #define __LINUX_SWIOTLB_H
>
> +#include <linux/device.h>
> #include <linux/dma-direction.h>
> #include <linux/init.h>
> #include <linux/types.h>
> @@ -101,9 +102,9 @@ struct io_tlb_mem {
> };
> extern struct io_tlb_mem *io_tlb_default_mem;
>
> -static inline bool is_swiotlb_buffer(phys_addr_t paddr)
> +static inline bool is_swiotlb_buffer(struct device *dev, phys_addr_t paddr)
> {
> - struct io_tlb_mem *mem = io_tlb_default_mem;
> + struct io_tlb_mem *mem = dev->dma_io_tlb_mem;
>
> return mem && paddr >= mem->start && paddr < mem->end;
> }
> @@ -115,7 +116,7 @@ bool is_swiotlb_active(void);
> void __init swiotlb_adjust_size(unsigned long size);
> #else
> #define swiotlb_force SWIOTLB_NO_FORCE
> -static inline bool is_swiotlb_buffer(phys_addr_t paddr)
> +static inline bool is_swiotlb_buffer(struct device *dev, phys_addr_t paddr)
> {
> return false;
> }
> diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
> index f737e3347059..84c9feb5474a 100644
> --- a/kernel/dma/direct.c
> +++ b/kernel/dma/direct.c
> @@ -343,7 +343,7 @@ void dma_direct_sync_sg_for_device(struct device *dev,
> for_each_sg(sgl, sg, nents, i) {
> phys_addr_t paddr = dma_to_phys(dev, sg_dma_address(sg));
>
> - if (unlikely(is_swiotlb_buffer(paddr)))
> + if (unlikely(is_swiotlb_buffer(dev, paddr)))
> swiotlb_sync_single_for_device(dev, paddr, sg->length,
> dir);
>
> @@ -369,7 +369,7 @@ void dma_direct_sync_sg_for_cpu(struct device *dev,
> if (!dev_is_dma_coherent(dev))
> arch_sync_dma_for_cpu(paddr, sg->length, dir);
>
> - if (unlikely(is_swiotlb_buffer(paddr)))
> + if (unlikely(is_swiotlb_buffer(dev, paddr)))
> swiotlb_sync_single_for_cpu(dev, paddr, sg->length,
> dir);
>
> @@ -504,7 +504,7 @@ size_t dma_direct_max_mapping_size(struct device *dev)
> bool dma_direct_need_sync(struct device *dev, dma_addr_t dma_addr)
> {
> return !dev_is_dma_coherent(dev) ||
> - is_swiotlb_buffer(dma_to_phys(dev, dma_addr));
> + is_swiotlb_buffer(dev, dma_to_phys(dev, dma_addr));
> }
>
> /**
> diff --git a/kernel/dma/direct.h b/kernel/dma/direct.h
> index 50afc05b6f1d..13e9e7158d94 100644
> --- a/kernel/dma/direct.h
> +++ b/kernel/dma/direct.h
> @@ -56,7 +56,7 @@ static inline void dma_direct_sync_single_for_device(struct device *dev,
> {
> phys_addr_t paddr = dma_to_phys(dev, addr);
>
> - if (unlikely(is_swiotlb_buffer(paddr)))
> + if (unlikely(is_swiotlb_buffer(dev, paddr)))
> swiotlb_sync_single_for_device(dev, paddr, size, dir);
>
> if (!dev_is_dma_coherent(dev))
> @@ -73,7 +73,7 @@ static inline void dma_direct_sync_single_for_cpu(struct device *dev,
> arch_sync_dma_for_cpu_all();
> }
>
> - if (unlikely(is_swiotlb_buffer(paddr)))
> + if (unlikely(is_swiotlb_buffer(dev, paddr)))
> swiotlb_sync_single_for_cpu(dev, paddr, size, dir);
>
> if (dir == DMA_FROM_DEVICE)
> @@ -113,7 +113,7 @@ static inline void dma_direct_unmap_page(struct device *dev, dma_addr_t addr,
> if (!(attrs & DMA_ATTR_SKIP_CPU_SYNC))
> dma_direct_sync_single_for_cpu(dev, addr, size, dir);
>
> - if (unlikely(is_swiotlb_buffer(phys)))
> + if (unlikely(is_swiotlb_buffer(dev, phys)))
> swiotlb_tbl_unmap_single(dev, phys, size, dir, attrs);
> }
> #endif /* _KERNEL_DMA_DIRECT_H */
> --
> 2.32.0.288.g62a8d224e6-goog
>
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