static int vfio_get_device(VFIOGroup *group, const char *name, VFIODevice *vdev) { struct vfio_device_info dev_info = { .argsz = sizeof(dev_info) }; struct vfio_region_info reg_info = { .argsz = sizeof(reg_info) }; int ret, i; ret = ioctl(group->fd, VFIO_GROUP_GET_DEVICE_FD, name); if (ret < 0) { error_report("vfio: error getting device %s from group %d: %m\n", name, group->groupid); error_report("Verify all devices in group %d are bound to vfio-pci " "or pci-stub and not already in use\n", group->groupid); return ret; } vdev->fd = ret; vdev->group = group; QLIST_INSERT_HEAD(&group->device_list, vdev, next); /* Sanity check device */ ret = ioctl(vdev->fd, VFIO_DEVICE_GET_INFO, &dev_info); if (ret) { error_report("vfio: error getting device info: %m\n"); goto error; } DPRINTF("Device %s flags: %u, regions: %u, irgs: %u\n", name, dev_info.flags, dev_info.num_regions, dev_info.num_irqs); if (!(dev_info.flags & VFIO_DEVICE_FLAGS_PCI)) { error_report("vfio: Um, this isn't a PCI device\n"); goto error; } vdev->reset_works = !!(dev_info.flags & VFIO_DEVICE_FLAGS_RESET); if (!vdev->reset_works) { error_report("Warning, device %s does not support reset\n", name); } if (dev_info.num_regions != VFIO_PCI_NUM_REGIONS) { error_report("vfio: unexpected number of io regions %u\n", dev_info.num_regions); goto error; } if (dev_info.num_irqs != VFIO_PCI_NUM_IRQS) { error_report("vfio: unexpected number of irqs %u\n", dev_info.num_irqs); goto error; } for (i = VFIO_PCI_BAR0_REGION_INDEX; i < VFIO_PCI_ROM_REGION_INDEX; i++) { reg_info.index = i; ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, &reg_info); if (ret) { error_report("vfio: Error getting region %d info: %m\n", i); goto error; } DPRINTF("Device %s region %d:\n", name, i); DPRINTF(" size: 0x%lx, offset: 0x%lx, flags: 0x%lx\n", (unsigned long)reg_info.size, (unsigned long)reg_info.offset, (unsigned long)reg_info.flags); vdev->bars[i].flags = reg_info.flags; vdev->bars[i].size = reg_info.size; vdev->bars[i].fd_offset = reg_info.offset; vdev->bars[i].fd = vdev->fd; vdev->bars[i].nr = i; } reg_info.index = VFIO_PCI_ROM_REGION_INDEX; ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, &reg_info); if (ret) { error_report("vfio: Error getting ROM info: %m\n"); goto error; } DPRINTF("Device %s ROM:\n", name); DPRINTF(" size: 0x%lx, offset: 0x%lx, flags: 0x%lx\n", (unsigned long)reg_info.size, (unsigned long)reg_info.offset, (unsigned long)reg_info.flags); vdev->rom_size = reg_info.size; vdev->rom_offset = reg_info.offset; reg_info.index = VFIO_PCI_CONFIG_REGION_INDEX; ret = ioctl(vdev->fd, VFIO_DEVICE_GET_REGION_INFO, &reg_info); if (ret) { error_report("vfio: Error getting config info: %m\n"); goto error; } DPRINTF("Device %s config:\n", name); DPRINTF(" size: 0x%lx, offset: 0x%lx, flags: 0x%lx\n", (unsigned long)reg_info.size, (unsigned long)reg_info.offset, (unsigned long)reg_info.flags); vdev->config_size = reg_info.size; vdev->config_offset = reg_info.offset; error: if (ret) { QLIST_REMOVE(vdev, next); vdev->group = NULL; close(vdev->fd); } return ret; }