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virtio-blk-pci.c (3368B)

      1 /*
      2  * Virtio blk 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.  See
     12  * the COPYING file in the top-level directory.
     13  *
     14  * Contributions after 2012-01-13 are licensed under the terms of the
     15  * GNU GPL, version 2 or (at your option) any later version.
     16  */
     17 
     18 #include "qemu/osdep.h"
     19 
     20 #include "hw/qdev-properties.h"
     21 #include "hw/virtio/virtio-blk.h"
     22 #include "hw/virtio/virtio-pci.h"
     23 #include "qapi/error.h"
     24 #include "qemu/module.h"
     25 #include "qom/object.h"
     26 
     27 typedef struct VirtIOBlkPCI VirtIOBlkPCI;
     28 
     29 /*
     30  * virtio-blk-pci: This extends VirtioPCIProxy.
     31  */
     32 #define TYPE_VIRTIO_BLK_PCI "virtio-blk-pci-base"
     33 DECLARE_INSTANCE_CHECKER(VirtIOBlkPCI, VIRTIO_BLK_PCI,
     34                          TYPE_VIRTIO_BLK_PCI)
     35 
     36 struct VirtIOBlkPCI {
     37     VirtIOPCIProxy parent_obj;
     38     VirtIOBlock vdev;
     39 };
     40 
     41 static Property virtio_blk_pci_properties[] = {
     42     DEFINE_PROP_UINT32("class", VirtIOPCIProxy, class_code, 0),
     43     DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
     44                     VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
     45     DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
     46                        DEV_NVECTORS_UNSPECIFIED),
     47     DEFINE_PROP_END_OF_LIST(),
     48 };
     49 
     50 static void virtio_blk_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
     51 {
     52     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(vpci_dev);
     53     DeviceState *vdev = DEVICE(&dev->vdev);
     54     VirtIOBlkConf *conf = &dev->vdev.conf;
     55 
     56     if (conf->num_queues == VIRTIO_BLK_AUTO_NUM_QUEUES) {
     57         conf->num_queues = virtio_pci_optimal_num_queues(0);
     58     }
     59 
     60     if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
     61         vpci_dev->nvectors = conf->num_queues + 1;
     62     }
     63 
     64     qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
     65 }
     66 
     67 static void virtio_blk_pci_class_init(ObjectClass *klass, void *data)
     68 {
     69     DeviceClass *dc = DEVICE_CLASS(klass);
     70     VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
     71     PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
     72 
     73     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
     74     device_class_set_props(dc, virtio_blk_pci_properties);
     75     k->realize = virtio_blk_pci_realize;
     76     pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
     77     pcidev_k->device_id = PCI_DEVICE_ID_VIRTIO_BLOCK;
     78     pcidev_k->revision = VIRTIO_PCI_ABI_VERSION;
     79     pcidev_k->class_id = PCI_CLASS_STORAGE_SCSI;
     80 }
     81 
     82 static void virtio_blk_pci_instance_init(Object *obj)
     83 {
     84     VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
     85 
     86     virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
     87                                 TYPE_VIRTIO_BLK);
     88     object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
     89                               "bootindex");
     90 }
     91 
     92 static const VirtioPCIDeviceTypeInfo virtio_blk_pci_info = {
     93     .base_name              = TYPE_VIRTIO_BLK_PCI,
     94     .generic_name           = "virtio-blk-pci",
     95     .transitional_name      = "virtio-blk-pci-transitional",
     96     .non_transitional_name  = "virtio-blk-pci-non-transitional",
     97     .instance_size = sizeof(VirtIOBlkPCI),
     98     .instance_init = virtio_blk_pci_instance_init,
     99     .class_init    = virtio_blk_pci_class_init,
    100 };
    101 
    102 static void virtio_blk_pci_register(void)
    103 {
    104     virtio_pci_types_register(&virtio_blk_pci_info);
    105 }
    106 
    107 type_init(virtio_blk_pci_register)