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virtio: get class_id and pci device id by the virtio id

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Add helpers to get the "Transitional PCI Device ID" and "class_id"
of the device specified by the "Virtio Device ID".

These helpers will be used to build the generic vDPA device later.

Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Longpeng <longpeng2@huawei.com>
Message-Id: <20221215134944.2809-2-longpeng2@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Longpeng 2022-12-15 21:49:40 +08:00 • committed by Michael S. Tsirkin
parent ee1c08bd73
commit 2273324540
2 changed files with 93 additions and 0 deletions
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5
include/hw/virtio/virtio-pci.h
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@ -151,6 +151,8 @@ struct VirtIOPCIProxy {
bool disable_modern;
bool ignore_backend_features;
OnOffAuto disable_legacy;
/* Transitional device id */
uint16_t trans_devid;
uint32_t class_code;
uint32_t nvectors;
uint32_t dfselect;
@ -184,6 +186,9 @@ static inline void virtio_pci_disable_modern(VirtIOPCIProxy *proxy)
proxy->disable_modern = true;
}
uint16_t virtio_pci_get_trans_devid(uint16_t device_id);
uint16_t virtio_pci_get_class_id(uint16_t device_id);
/*
* virtio-input-pci: This extends VirtioPCIProxy.
*/