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Mon, 15 May 2023 09:16:14 +0000 (GMT) From: Niklas Schnelle Date: Mon, 15 May 2023 11:15:51 +0200 Subject: [PATCH v9 1/6] s390/ism: Set DMA coherent mask Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20230310-dma_iommu-v9-1-65bb8edd2beb@linux.ibm.com> References: <20230310-dma_iommu-v9-0-65bb8edd2beb@linux.ibm.com> In-Reply-To: <20230310-dma_iommu-v9-0-65bb8edd2beb@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 0.12.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1331; i=schnelle@linux.ibm.com; h=from:subject:message-id; bh=iv5rTctIVBJRkTP8lY/YEQZWLj3JMw1iilc8H5Z4idA=; b=owGbwMvMwCH2Wz534YHOJ2GMp9WSGFISf0Qc5vv66xyHtOs/U5cwS9lPaSlRHmsnxXzS7Fh2f Z3N8WkPOkpZGMQ4GGTFFFkWdTn7rSuYYronqL8DZg4rE8gQBi5OAZhIcynDP5N3dkHV/LqhFcuU /jn47Vg/48kasQdStkeeBUh0l61fvISR4U2sXDZLRU0R37Lz3jf2t76WXXQrcIHat5BdDE1tMgF /mAE= X-Developer-Key: i=schnelle@linux.ibm.com; a=openpgp; fpr=9DB000B2D2752030A5F72DDCAFE43F15E8C26090 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: pJoXblQutXXgbi5m_OUSFyoV1170AFtf X-Proofpoint-ORIG-GUID: Hk-7C_dDrmWdrumF0NtHFZD0h53OyVPV 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=2023-05-15_06,2023-05-05_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 mlxlogscore=999 adultscore=0 bulkscore=0 lowpriorityscore=0 clxscore=1015 mlxscore=0 spamscore=0 impostorscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305150078 X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net 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 Reviewed-by: Pierre Morel --- 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 8acb9eba691b..1399b5dc646c 100644 --- a/drivers/s390/net/ism_drv.c +++ b/drivers/s390/net/ism_drv.c @@ -660,7 +660,7 @@ 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;