qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
Log | Files | Refs | Submodules | LICENSE

virtio-scsi-pci.c (3522B)

      1 /*
      2  * Virtio scsi PCI Bindings
      3  *
      4  * Copyright IBM, Corp. 2007
      5  * Copyright (c) 2009 CodeSourcery
      6  *
      7  * Authors:
      8  *  Anthony Liguori   <aliguori@us.ibm.com>
      9  *  Paul Brook        <paul@codesourcery.com>
     10  *
     11  * This work is licensed under the terms of the GNU GPL, version 2 or
     12  * (at your option) any later version.  See the COPYING file in the
     13  * top-level directory.
     14  */
     15 
     16 #include "qemu/osdep.h"
     17 
     18 #include "hw/qdev-properties.h"
     19 #include "hw/virtio/virtio-scsi.h"
     20 #include "qemu/module.h"
     21 #include "hw/virtio/virtio-pci.h"
     22 #include "qom/object.h"
     23 
     24 typedef struct VirtIOSCSIPCI VirtIOSCSIPCI;
     25 
     26 /*
     27  * virtio-scsi-pci: This extends VirtioPCIProxy.
     28  */
     29 #define TYPE_VIRTIO_SCSI_PCI "virtio-scsi-pci-base"
     30 DECLARE_INSTANCE_CHECKER(VirtIOSCSIPCI, VIRTIO_SCSI_PCI,
     31                          TYPE_VIRTIO_SCSI_PCI)
     32 
     33 struct VirtIOSCSIPCI {
     34     VirtIOPCIProxy parent_obj;
     35     VirtIOSCSI vdev;
     36 };
     37 
     38 static Property virtio_scsi_pci_properties[] = {
     39     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
     40                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
     41     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
     42                        DEV_NVECTORS_UNSPECIFIED),
     43     DEFINE_PROP_END_OF_LIST(),
     44 };
     45 
     46 static void virtio_scsi_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     47 {
     48     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(vpci_dev);
     49     DeviceState *vdev = DEVICE(&dev->vdev);
     50     DeviceState *proxy = DEVICE(vpci_dev);
     51     VirtIOSCSIConf *conf = &dev->vdev.parent_obj.conf;
     52     char *bus_name;
     53 
     54     if (conf->num_queues == VIRTIO_SCSI_AUTO_NUM_QUEUES) {
     55         conf->num_queues =
     56             virtio_pci_optimal_num_queues(VIRTIO_SCSI_VQ_NUM_FIXED);
     57     }
     58 
     59     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
     60         vpci_dev->nvectors = conf->num_queues + VIRTIO_SCSI_VQ_NUM_FIXED + 1;
     61     }
     62 
     63     /*
     64      * For command line compatibility, this sets the virtio-scsi-device bus
     65      * name as before.
     66      */
     67     if (proxy->id) {
     68         bus_name = g_strdup_printf("%s.0", proxy->id);
     69         virtio_device_set_child_bus_name(VIRTIO_DEVICE(vdev), bus_name);
     70         g_free(bus_name);
     71     }
     72 
     73     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
     74 }
     75 
     76 static void virtio_scsi_pci_class_init(ObjectClass *klass, void *data)
     77 {
     78     DeviceClass *dc = DEVICE_CLASS(klass);
     79     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
     80     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
     81 
     82     k->realize = virtio_scsi_pci_realize;
     83     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
     84     device_class_set_props(dc, virtio_scsi_pci_properties);
     85     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
     86     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_SCSI;
     87     pcidev_k->revision = 0x00;
     88     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
     89 }
     90 
     91 static void virtio_scsi_pci_instance_init(Object *obj)
     92 {
     93     VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
     94 
     95     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
     96                                 TYPE_VIRTIO_SCSI);
     97 }
     98 
     99 static const VirtioPCIDeviceTypeInfo virtio_scsi_pci_info = {
    100     .base_name              = TYPE_VIRTIO_SCSI_PCI,
    101     .generic_name           = "virtio-scsi-pci",
    102     .transitional_name      = "virtio-scsi-pci-transitional",
    103     .non_transitional_name  = "virtio-scsi-pci-non-transitional",
    104     .instance_size = sizeof(VirtIOSCSIPCI),
    105     .instance_init = virtio_scsi_pci_instance_init,
    106     .class_init    = virtio_scsi_pci_class_init,
    107 };
    108 
    109 static void virtio_scsi_pci_register(void)
    110 {
    111     virtio_pci_types_register(&virtio_scsi_pci_info);
    112 }
    113 
    114 type_init(virtio_scsi_pci_register)