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Sat, 7 Sep 2019 00:13:56 GMT Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0521A124052; Sat, 7 Sep 2019 00:13:56 +0000 (GMT) Received: from b01ledav002.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2C6C7124053; Sat, 7 Sep 2019 00:13:55 +0000 (GMT) Received: from oc4221205838.ibm.com (unknown [9.85.134.207]) by b01ledav002.gho.pok.ibm.com (Postfix) with ESMTP; Sat, 7 Sep 2019 00:13:55 +0000 (GMT) From: Matthew Rosato To: sebott@linux.ibm.com Subject: [PATCH v4 4/4] vfio: pci: Using a device region to retrieve zPCI information Date: Fri, 6 Sep 2019 20:13:51 -0400 Message-Id: <1567815231-17940-5-git-send-email-mjrosato@linux.ibm.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1567815231-17940-1-git-send-email-mjrosato@linux.ibm.com> References: <1567815231-17940-1-git-send-email-mjrosato@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-09-06_11:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1909070000 X-Mailman-Approved-At: Sat, 07 Sep 2019 05:54:18 +0000 Cc: linux-s390@vger.kernel.org, walling@linux.ibm.com, alex.williamson@redhat.com, gor@linux.ibm.com, kvm@vger.kernel.org, pmorel@linux.ibm.com, cohuck@redhat.com, heiko.carstens@de.ibm.com, linux-kernel@vger.kernel.org, pasic@linux.ibm.com, borntraeger@de.ibm.com, iommu@lists.linux-foundation.org, robin.murphy@arm.com, gerald.schaefer@de.ibm.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org From: Pierre Morel We define a new configuration entry for VFIO/PCI, VFIO_PCI_ZDEV When the VFIO_PCI_ZDEV feature is configured we initialize a new device region, VFIO_REGION_SUBTYPE_ZDEV_CLP, to hold the information from the ZPCI device the use Signed-off-by: Pierre Morel Signed-off-by: Matthew Rosato --- drivers/vfio/pci/Kconfig | 7 +++ drivers/vfio/pci/Makefile | 1 + drivers/vfio/pci/vfio_pci.c | 9 ++++ drivers/vfio/pci/vfio_pci_private.h | 10 +++++ drivers/vfio/pci/vfio_pci_zdev.c | 85 +++++++++++++++++++++++++++++++++++++ 5 files changed, 112 insertions(+) create mode 100644 drivers/vfio/pci/vfio_pci_zdev.c diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig index ac3c1dd..d4562a8 100644 --- a/drivers/vfio/pci/Kconfig +++ b/drivers/vfio/pci/Kconfig @@ -45,3 +45,10 @@ config VFIO_PCI_NVLINK2 depends on VFIO_PCI && PPC_POWERNV help VFIO PCI support for P9 Witherspoon machine with NVIDIA V100 GPUs + +config VFIO_PCI_ZDEV + bool "VFIO PCI Generic for ZPCI devices" + depends on VFIO_PCI && S390 + default y + help + VFIO PCI support for S390 Z-PCI devices diff --git a/drivers/vfio/pci/Makefile b/drivers/vfio/pci/Makefile index f027f8a..781e080 100644 --- a/drivers/vfio/pci/Makefile +++ b/drivers/vfio/pci/Makefile @@ -3,5 +3,6 @@ vfio-pci-y := vfio_pci.o vfio_pci_intrs.o vfio_pci_rdwr.o vfio_pci_config.o vfio-pci-$(CONFIG_VFIO_PCI_IGD) += vfio_pci_igd.o vfio-pci-$(CONFIG_VFIO_PCI_NVLINK2) += vfio_pci_nvlink2.o +vfio-pci-$(CONFIG_VFIO_PCI_ZDEV) += vfio_pci_zdev.o obj-$(CONFIG_VFIO_PCI) += vfio-pci.o diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c index 703948c..b40544a 100644 --- a/drivers/vfio/pci/vfio_pci.c +++ b/drivers/vfio/pci/vfio_pci.c @@ -356,6 +356,15 @@ static int vfio_pci_enable(struct vfio_pci_device *vdev) } } + if (IS_ENABLED(CONFIG_VFIO_PCI_ZDEV)) { + ret = vfio_pci_zdev_init(vdev); + if (ret) { + dev_warn(&vdev->pdev->dev, + "Failed to setup ZDEV regions\n"); + goto disable_exit; + } + } + vfio_pci_probe_mmaps(vdev); return 0; diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h index ee6ee91..08e02f5 100644 --- a/drivers/vfio/pci/vfio_pci_private.h +++ b/drivers/vfio/pci/vfio_pci_private.h @@ -186,4 +186,14 @@ static inline int vfio_pci_ibm_npu2_init(struct vfio_pci_device *vdev) return -ENODEV; } #endif + +#ifdef CONFIG_VFIO_PCI_ZDEV +extern int vfio_pci_zdev_init(struct vfio_pci_device *vdev); +#else +static inline int vfio_pci_zdev_init(struct vfio_pci_device *vdev) +{ + return -ENODEV; +} +#endif + #endif /* VFIO_PCI_PRIVATE_H */ diff --git a/drivers/vfio/pci/vfio_pci_zdev.c b/drivers/vfio/pci/vfio_pci_zdev.c new file mode 100644 index 0000000..22e2b60 --- /dev/null +++ b/drivers/vfio/pci/vfio_pci_zdev.c @@ -0,0 +1,85 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * VFIO ZPCI devices support + * + * Copyright (C) IBM Corp. 2019. All rights reserved. + * Author: Pierre Morel + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ +#include +#include +#include +#include +#include + +#include "vfio_pci_private.h" + +static size_t vfio_pci_zdev_rw(struct vfio_pci_device *vdev, + char __user *buf, size_t count, loff_t *ppos, + bool iswrite) +{ + struct vfio_region_zpci_info *region; + struct zpci_dev *zdev; + unsigned int index = VFIO_PCI_OFFSET_TO_INDEX(*ppos); + loff_t pos = *ppos & VFIO_PCI_OFFSET_MASK; + + if (!vdev->pdev->bus) + return -ENODEV; + + zdev = vdev->pdev->bus->sysdata; + if (!zdev) + return -ENODEV; + + if (pos >= sizeof(*region) || iswrite) + return -EINVAL; + + region = vdev->region[index - VFIO_PCI_NUM_REGIONS].data; + region->dasm = zdev->dma_mask; + region->start_dma = zdev->start_dma; + region->end_dma = zdev->end_dma; + region->msi_addr = zdev->msi_addr; + region->flags = VFIO_PCI_ZDEV_FLAGS_REFRESH; + region->gid = zdev->pfgid; + region->mui = zdev->fmb_update; + region->noi = zdev->max_msi; + memcpy(region->util_str, zdev->util_str, CLP_UTIL_STR_LEN); + + count = min(count, (size_t)(sizeof(*region) - pos)); + if (copy_to_user(buf, region, count)) + return -EFAULT; + + return count; +} + +static void vfio_pci_zdev_release(struct vfio_pci_device *vdev, + struct vfio_pci_region *region) +{ + kfree(region->data); +} + +static const struct vfio_pci_regops vfio_pci_zdev_regops = { + .rw = vfio_pci_zdev_rw, + .release = vfio_pci_zdev_release, +}; + +int vfio_pci_zdev_init(struct vfio_pci_device *vdev) +{ + struct vfio_region_zpci_info *region; + int ret; + + region = kmalloc(sizeof(*region) + CLP_UTIL_STR_LEN, GFP_KERNEL); + if (!region) + return -ENOMEM; + + ret = vfio_pci_register_dev_region(vdev, + PCI_VENDOR_ID_IBM | VFIO_REGION_TYPE_PCI_VENDOR_TYPE, + VFIO_REGION_SUBTYPE_ZDEV_CLP, + &vfio_pci_zdev_regops, sizeof(*region) + CLP_UTIL_STR_LEN, + VFIO_REGION_INFO_FLAG_READ, region); + + return ret; +} -- 1.8.3.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu