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Fri, 17 Jul 2026 18:07:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784311641; bh=GmV+DLQ7tYIWroxvAExoKmvbkkmdzgJAVMErN4og4x4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=az13IthdkXyuHXIkezoBcf/c1Fq7gOmr7pJ1N3ScoTlVliZ+mKyhugHc9IoFT/+ps mx/VWltvB/OE4cP7XVfJT7AqIaVa7vuI1ROM488yX1sON079TaNz/XxE+xmHpKkt8M /hZFLyvrERm9g9N7xKjKO9NUJrnHEBcwHHBg7sH5PBNQyieyFGG7wCvdZngIL5m3j+ ael+cAywtofFkarpwGqmsZLoLfjzo12yL3TkTj8rc0hI4v+RYuvJ7cnoHuhB0vZPUz Qziyito1Btp7hGtyoEZ9uNsobXFeDPhhKVJQYbd306KM6UCfmPQpZagHXHUAo/FDXE oax4sLpMKdbDA== From: "Aneesh Kumar K.V (Arm)" To: iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev Cc: "Aneesh Kumar K.V (Arm)" , Robin Murphy , Marek Szyprowski , Will Deacon , Marc Zyngier , Steven Price , Suzuki K Poulose , Catalin Marinas , Jiri Pirko , Jason Gunthorpe , Mostafa Saleh , Petr Tesarik , Alexey Kardashevskiy , Dan Williams , Xu Yilun , linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Alexander Gordeev , Gerald Schaefer , Heiko Carstens , Vasily Gorbik , Christian Borntraeger , Sven Schnelle , x86@kernel.org, Jason Gunthorpe , Michael Kelley Subject: [PATCH v8 12/23] dma: swiotlb: pass mapping attributes by reference Date: Fri, 17 Jul 2026 23:34:30 +0530 Message-ID: <20260717180442.110954-13-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260717180442.110954-1-aneesh.kumar@kernel.org> References: <20260717180442.110954-1-aneesh.kumar@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Change swiotlb_tbl_map_single() to take the DMA mapping attributes by reference and update the direct callers accordingly. This is a preparatory change for a follow-up patch which updates the attributes based on the selected swiotlb pool. Keeping the signature change separate makes the follow-up patch easier to review. No functional change in this patch. Reviewed-by: Jason Gunthorpe Tested-by: Michael Kelley Tested-by: Mostafa Saleh Reviewed-by: Petr Tesarik Signed-off-by: Aneesh Kumar K.V (Arm) --- drivers/iommu/dma-iommu.c | 2 +- drivers/xen/swiotlb-xen.c | 2 +- include/linux/swiotlb.h | 2 +- kernel/dma/swiotlb.c | 6 +++--- 4 files changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c index 83bf15ae9777..c42e40e60575 100644 --- a/drivers/iommu/dma-iommu.c +++ b/drivers/iommu/dma-iommu.c @@ -1180,7 +1180,7 @@ static phys_addr_t iommu_dma_map_swiotlb(struct device *dev, phys_addr_t phys, trace_swiotlb_bounced(dev, phys, size); phys = swiotlb_tbl_map_single(dev, phys, size, iova_mask(iovad), dir, - attrs); + &attrs); /* * Untrusted devices should not see padding areas with random leftover diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index 2cbf2b588f5b..8c4abe65cd49 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -243,7 +243,7 @@ static dma_addr_t xen_swiotlb_map_phys(struct device *dev, phys_addr_t phys, */ trace_swiotlb_bounced(dev, dev_addr, size); - map = swiotlb_tbl_map_single(dev, phys, size, 0, dir, attrs); + map = swiotlb_tbl_map_single(dev, phys, size, 0, dir, &attrs); if (map == (phys_addr_t)DMA_MAPPING_ERROR) return DMA_MAPPING_ERROR; diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h index c92ff6791595..ea4c0a292dea 100644 --- a/include/linux/swiotlb.h +++ b/include/linux/swiotlb.h @@ -238,7 +238,7 @@ static inline phys_addr_t default_swiotlb_limit(void) phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, phys_addr_t phys, size_t mapping_size, unsigned int alloc_aligned_mask, - enum dma_data_direction dir, unsigned long attrs); + enum dma_data_direction dir, unsigned long *attrs); dma_addr_t swiotlb_map(struct device *dev, phys_addr_t phys, size_t size, enum dma_data_direction dir, unsigned long attrs); diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 908de28aceb2..046ae92c4832 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -1396,7 +1396,7 @@ static unsigned long mem_used(struct io_tlb_mem *mem) */ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr, size_t mapping_size, unsigned int alloc_align_mask, - enum dma_data_direction dir, unsigned long attrs) + enum dma_data_direction dir, unsigned long *attrs) { struct io_tlb_mem *mem = dev->dma_io_tlb_mem; unsigned int offset; @@ -1430,7 +1430,7 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr, size = ALIGN(mapping_size + offset, alloc_align_mask + 1); index = swiotlb_find_slots(dev, orig_addr, size, alloc_align_mask, &pool); if (index == -1) { - if (!(attrs & DMA_ATTR_NO_WARN)) + if (!(*attrs & DMA_ATTR_NO_WARN)) dev_warn_ratelimited(dev, "swiotlb buffer is full (sz: %zd bytes), total %lu (slots), used %lu (slots)\n", size, mem->nslabs, mem_used(mem)); @@ -1609,7 +1609,7 @@ dma_addr_t swiotlb_map(struct device *dev, phys_addr_t paddr, size_t size, trace_swiotlb_bounced(dev, phys_to_dma(dev, paddr), size); - swiotlb_addr = swiotlb_tbl_map_single(dev, paddr, size, 0, dir, attrs); + swiotlb_addr = swiotlb_tbl_map_single(dev, paddr, size, 0, dir, &attrs); if (swiotlb_addr == (phys_addr_t)DMA_MAPPING_ERROR) return DMA_MAPPING_ERROR; -- 2.43.0