static int vfio_get_device(VFIOGroup *group, const char *name, VFIOPCIDevice *vdev) { struct vfio_device_info dev_info = { .argsz = sizeof(dev_info) }; struct vfio_region_info reg_info = { .argsz = sizeof(reg_info) }; struct vfio_irq_info irq_info = { .argsz = sizeof(irq_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", name, group->groupid); error_printf("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->vbasedev.fd = ret; vdev->vbasedev.group = group; QLIST_INSERT_HEAD(&group->device_list, vdev, next); /* Sanity check device */ ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_INFO, &dev_info); if (ret) { error_report("vfio: error getting device info: %m"); goto error; } trace_vfio_get_device_irq(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"); goto error; } vdev->reset_works = !!(dev_info.flags & VFIO_DEVICE_FLAGS_RESET); if (dev_info.num_regions < VFIO_PCI_CONFIG_REGION_INDEX + 1) { error_report("vfio: unexpected number of io regions %u", dev_info.num_regions); goto error; } if (dev_info.num_irqs < VFIO_PCI_MSIX_IRQ_INDEX + 1) { error_report("vfio: unexpected number of irqs %u", 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->vbasedev.fd, VFIO_DEVICE_GET_REGION_INFO, &reg_info); if (ret) { error_report("vfio: Error getting region %d info: %m", i); goto error; } trace_vfio_get_device_region(name, i, (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->vbasedev.fd; vdev->bars[i].nr = i; QLIST_INIT(&vdev->bars[i].quirks); } reg_info.index = VFIO_PCI_CONFIG_REGION_INDEX; ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_REGION_INFO, &reg_info); if (ret) { error_report("vfio: Error getting config info: %m"); goto error; } trace_vfio_get_device_config(name, (unsigned long)reg_info.size, (unsigned long)reg_info.offset, (unsigned long)reg_info.flags); vdev->config_size = reg_info.size; if (vdev->config_size == PCI_CONFIG_SPACE_SIZE) { vdev->pdev.cap_present &= ~QEMU_PCI_CAP_EXPRESS; } vdev->config_offset = reg_info.offset; if ((vdev->features & VFIO_FEATURE_ENABLE_VGA) && dev_info.num_regions > VFIO_PCI_VGA_REGION_INDEX) { struct vfio_region_info vga_info = { .argsz = sizeof(vga_info), .index = VFIO_PCI_VGA_REGION_INDEX, }; ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_REGION_INFO, &vga_info); if (ret) { error_report( "vfio: Device does not support requested feature x-vga"); goto error; } if (!(vga_info.flags & VFIO_REGION_INFO_FLAG_READ) || !(vga_info.flags & VFIO_REGION_INFO_FLAG_WRITE) || vga_info.size < 0xbffff + 1) { error_report("vfio: Unexpected VGA info, flags 0x%lx, size 0x%lx", (unsigned long)vga_info.flags, (unsigned long)vga_info.size); goto error; } vdev->vga.fd_offset = vga_info.offset; vdev->vga.fd = vdev->vbasedev.fd; vdev->vga.region[QEMU_PCI_VGA_MEM].offset = QEMU_PCI_VGA_MEM_BASE; vdev->vga.region[QEMU_PCI_VGA_MEM].nr = QEMU_PCI_VGA_MEM; QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_MEM].quirks); vdev->vga.region[QEMU_PCI_VGA_IO_LO].offset = QEMU_PCI_VGA_IO_LO_BASE; vdev->vga.region[QEMU_PCI_VGA_IO_LO].nr = QEMU_PCI_VGA_IO_LO; QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_IO_LO].quirks); vdev->vga.region[QEMU_PCI_VGA_IO_HI].offset = QEMU_PCI_VGA_IO_HI_BASE; vdev->vga.region[QEMU_PCI_VGA_IO_HI].nr = QEMU_PCI_VGA_IO_HI; QLIST_INIT(&vdev->vga.region[QEMU_PCI_VGA_IO_HI].quirks); vdev->has_vga = true; } irq_info.index = VFIO_PCI_ERR_IRQ_INDEX; ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_GET_IRQ_INFO, &irq_info); if (ret) { /* This can fail for an old kernel or legacy PCI dev */ trace_vfio_get_device_get_irq_info_failure(); ret = 0; } else if (irq_info.count == 1) { vdev->pci_aer = true; } else { error_report("vfio: %04x:%02x:%02x.%x " "Could not enable error recovery for the device", vdev->host.domain, vdev->host.bus, vdev->host.slot, vdev->host.function); } error: if (ret) { QLIST_REMOVE(vdev, next); vdev->vbasedev.group = NULL; close(vdev->vbasedev.fd); } return ret; }