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Fri, 18 Jun 2021 20:41:20 -0700 (PDT) From: Claire Chang To: Rob Herring , mpe@ellerman.id.au, Joerg Roedel , Will Deacon , Frank Rowand , Konrad Rzeszutek Wilk , boris.ostrovsky@oracle.com, jgross@suse.com, Christoph Hellwig , Marek Szyprowski Cc: benh@kernel.crashing.org, paulus@samba.org, "list@263.net:IOMMU DRIVERS" , sstabellini@kernel.org, Robin Murphy , grant.likely@arm.com, xypron.glpk@gmx.de, Thierry Reding , mingo@kernel.org, bauerman@linux.ibm.com, peterz@infradead.org, Greg KH , Saravana Kannan , "Rafael J . Wysocki" , heikki.krogerus@linux.intel.com, Andy Shevchenko , Randy Dunlap , Dan Williams , Bartosz Golaszewski , linux-devicetree , lkml , linuxppc-dev@lists.ozlabs.org, xen-devel@lists.xenproject.org, Nicolas Boichat , Jim Quinlan , tfiga@chromium.org, bskeggs@redhat.com, bhelgaas@google.com, chris@chris-wilson.co.uk, tientzu@chromium.org, daniel@ffwll.ch, airlied@linux.ie, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, jani.nikula@linux.intel.com, jxgao@google.com, joonas.lahtinen@linux.intel.com, linux-pci@vger.kernel.org, maarten.lankhorst@linux.intel.com, matthew.auld@intel.com, rodrigo.vivi@intel.com, thomas.hellstrom@linux.intel.com, thomas.lendacky@amd.com Subject: [PATCH v14 03/12] swiotlb: Set dev->dma_io_tlb_mem to the swiotlb pool used Date: Sat, 19 Jun 2021 11:40:34 +0800 Message-Id: <20210619034043.199220-4-tientzu@chromium.org> X-Mailer: git-send-email 2.32.0.288.g62a8d224e6-goog In-Reply-To: <20210619034043.199220-1-tientzu@chromium.org> References: <20210619034043.199220-1-tientzu@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @chromium.org) Content-Type: text/plain; charset="utf-8" Always have the pointer to the swiotlb pool used in struct device. This could help simplify the code for other pools. Signed-off-by: Claire Chang Reviewed-by: Christoph Hellwig Tested-by: Stefano Stabellini Tested-by: Will Deacon Acked-by: Stefano Stabellini --- drivers/base/core.c | 4 ++++ include/linux/device.h | 4 ++++ kernel/dma/swiotlb.c | 8 ++++---- 3 files changed, 12 insertions(+), 4 deletions(-) diff --git a/drivers/base/core.c b/drivers/base/core.c index f29839382f81..cb3123e3954d 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include /* for dma_default_coherent */ =20 @@ -2736,6 +2737,9 @@ void device_initialize(struct device *dev) defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) dev->dma_coherent =3D dma_default_coherent; #endif +#ifdef CONFIG_SWIOTLB + dev->dma_io_tlb_mem =3D io_tlb_default_mem; +#endif } EXPORT_SYMBOL_GPL(device_initialize); =20 diff --git a/include/linux/device.h b/include/linux/device.h index ba660731bd25..240d652a0696 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -416,6 +416,7 @@ struct dev_links_info { * @dma_pools: Dma pools (if dma'ble device). * @dma_mem: Internal for coherent mem override. * @cma_area: Contiguous memory area for dma allocations + * @dma_io_tlb_mem: Pointer to the swiotlb pool used. Not for driver use. * @archdata: For arch-specific additions. * @of_node: Associated device tree node. * @fwnode: Associated device node supplied by platform firmware. @@ -518,6 +519,9 @@ struct device { #ifdef CONFIG_DMA_CMA struct cma *cma_area; /* contiguous memory area for dma allocations */ +#endif +#ifdef CONFIG_SWIOTLB + struct io_tlb_mem *dma_io_tlb_mem; #endif /* arch specific additions */ struct dev_archdata archdata; diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index ede66df6835b..72a4289faed1 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -340,7 +340,7 @@ void __init swiotlb_exit(void) static void swiotlb_bounce(struct device *dev, phys_addr_t tlb_addr, size_= t size, enum dma_data_direction dir) { - struct io_tlb_mem *mem =3D io_tlb_default_mem; + struct io_tlb_mem *mem =3D dev->dma_io_tlb_mem; int index =3D (tlb_addr - mem->start) >> IO_TLB_SHIFT; unsigned int offset =3D (tlb_addr - mem->start) & (IO_TLB_SIZE - 1); phys_addr_t orig_addr =3D mem->slots[index].orig_addr; @@ -431,7 +431,7 @@ static unsigned int wrap_index(struct io_tlb_mem *mem, = unsigned int index) static int find_slots(struct device *dev, phys_addr_t orig_addr, size_t alloc_size) { - struct io_tlb_mem *mem =3D io_tlb_default_mem; + struct io_tlb_mem *mem =3D dev->dma_io_tlb_mem; unsigned long boundary_mask =3D dma_get_seg_boundary(dev); dma_addr_t tbl_dma_addr =3D phys_to_dma_unencrypted(dev, mem->start) & boundary_mask; @@ -508,7 +508,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, = phys_addr_t orig_addr, size_t mapping_size, size_t alloc_size, enum dma_data_direction dir, unsigned long attrs) { - struct io_tlb_mem *mem =3D io_tlb_default_mem; + struct io_tlb_mem *mem =3D dev->dma_io_tlb_mem; unsigned int offset =3D swiotlb_align_offset(dev, orig_addr); unsigned int i; int index; @@ -559,7 +559,7 @@ void swiotlb_tbl_unmap_single(struct device *hwdev, phy= s_addr_t tlb_addr, size_t mapping_size, enum dma_data_direction dir, unsigned long attrs) { - struct io_tlb_mem *mem =3D io_tlb_default_mem; + struct io_tlb_mem *mem =3D hwdev->dma_io_tlb_mem; unsigned long flags; unsigned int offset =3D swiotlb_align_offset(hwdev, tlb_addr); int index =3D (tlb_addr - offset - mem->start) >> IO_TLB_SHIFT; --=20 2.32.0.288.g62a8d224e6-goog