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Fri, 10 Mar 2023 16:08:14 +0000 (GMT) From: Niklas Schnelle Date: Fri, 10 Mar 2023 17:07:46 +0100 Subject: [PATCH v8 1/6] s390/ism: Set DMA coherent mask MIME-Version: 1.0 Message-Id: <20230310-dma_iommu-v8-1-2347dfbed7af@linux.ibm.com> References: <20230310-dma_iommu-v8-0-2347dfbed7af@linux.ibm.com> In-Reply-To: <20230310-dma_iommu-v8-0-2347dfbed7af@linux.ibm.com> To: Joerg Roedel , Matthew Rosato , Will Deacon , Wenjia Zhang , Robin Murphy , Jason Gunthorpe Cc: Gerd Bayer , Julian Ruess , Pierre Morel , Alexandra Winter , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Suravee Suthikulpanit , Hector Martin , Sven Peter , Alyssa Rosenzweig , David Woodhouse , Lu Baolu , Andy Gross , Bjorn Andersson , Konrad Dybcio , Yong Wu , Matthias Brugger , AngeloGioacchino Del Regno , Gerald Schaefer , Orson Zhai , Baolin Wang , Chunyan Zhang , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Thierry Reding , Krishna Reddy , Jonathan Hunter , Niklas Schnelle , Jonathan Corbet , linux-s390@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, linux-doc@vger.kernel.org X-Mailer: b4 0.12.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=1331; i=schnelle@linux.ibm.com; h=from:subject:message-id; bh=QP466Tmuhke9ZpYBaps9u7QPQnPFsiOIACaxA8oBroY=; b=owGbwMvMwCH2Wz534YHOJ2GMp9WSGFK4Q5+vllZav+rNo0U7la52x0cImVZcN1RS98zw3P39X dcKy9xDHaUsDGIcDLJiiiyLupz91hVMMd0T1N8BM4eVCWQIAxenAEyk5BAjw1fbxSKbZiyYNOfX i9e+U6NU79z3+X/DQu1J5mrDsK1bQmIZGaZefqL26+xhvtRDD/vNeD1lsyY9V5Rb46KxIP5eF2/ uLW4A X-Developer-Key: i=schnelle@linux.ibm.com; a=openpgp; fpr=9DB000B2D2752030A5F72DDCAFE43F15E8C26090 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: t6DB5i8vhkARvWYCiBWLQXRiiRuyxhWc X-Proofpoint-GUID: CyMGare_uRiBCY_5gvYk6zMLo51yZXdw X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-03-10_06,2023-03-10_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 phishscore=0 bulkscore=0 mlxscore=0 adultscore=0 lowpriorityscore=0 spamscore=0 clxscore=1015 priorityscore=1501 suspectscore=0 mlxlogscore=999 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2303100124 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org A future change will convert the DMA API implementation from the architecture specific arch/s390/pci/pci_dma.c to using the common code drivers/iommu/dma-iommu.c which the utilizes the same IOMMU hardware through the s390-iommu driver. Unlike the s390 specific DMA API this requires devices to correctly call set the coherent mask to be allowed to use IOVAs >2^32 in dma_alloc_coherent(). This was however not done for ISM devices. ISM requires such addresses since currently the DMA aperture for PCI devices starts at 2^32 and all calls to dma_alloc_coherent() would thus fail. Reviewed-by: Alexandra Winter Reviewed-by: Matthew Rosato Signed-off-by: Niklas Schnelle --- drivers/s390/net/ism_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/s390/net/ism_drv.c b/drivers/s390/net/ism_drv.c index eb7e13486087..a40e3afeaaa8 100644 --- a/drivers/s390/net/ism_drv.c +++ b/drivers/s390/net/ism_drv.c @@ -661,7 +661,7 @@ static int ism_probe(struct pci_dev *pdev, const struct pci_device_id *id) if (ret) goto err_disable; - ret = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)); + ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); if (ret) goto err_resource;