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Miller" , Alexandra Winter , Wenjia Zhang , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-pci@vger.kernel.org, Matthew Rosato , Pierre Morel , linux-s390@vger.kernel.org Subject: [PATCH net-next] s390/ism: Set DMA coherent mask Date: Wed, 24 May 2023 09:54:10 +0200 Message-Id: <20230524075411.3734141-1-schnelle@linux.ibm.com> X-Mailer: git-send-email 2.39.2 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: IP9jPuNTbIrXKI-7-cVVuXaYW72dL7NF X-Proofpoint-ORIG-GUID: IP9jPuNTbIrXKI-7-cVVuXaYW72dL7NF X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-05-24_03,2023-05-23_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=955 lowpriorityscore=0 spamscore=0 mlxscore=0 suspectscore=0 bulkscore=0 adultscore=0 priorityscore=1501 malwarescore=0 phishscore=0 impostorscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305240064 X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,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 Precedence: bulk List-ID: X-Mailing-List: linux-pci@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 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. Link: https://lore.kernel.org/all/20230310-dma_iommu-v9-1-65bb8edd2beb@linux.ibm.com/ Reviewed-by: Alexandra Winter Reviewed-by: Matthew Rosato Reviewed-by: Pierre Morel Signed-off-by: Niklas Schnelle --- Note: This was previously sent and reviewed as part of multiple versions of the s390 DMA API conversion series which requires this change as a pre-requisite with the latest version at the Link. Sending separately to add the net-next prefix so this can be integrated. 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;