drivers/virtio/virtio_pci_common.h

1 /* SPDX-License-Identifier: GPL-2.0-or-later */
5  * Virtio PCI driver - APIs for common functionality for all device versions
7  * This module allows virtio devices to be used over a virtual PCI device.
21 #include <linux/pci.h>
24 #include <linux/virtio.h>
41 	/* MSI-X vector (or none) */
74 	 * PCI common config num_queues field
80 	/* MSI-X support */
89 	/* Vectors allocated, excluding per-vq vectors if any */
108 /* Constants for MSI-X */
116 /* Convert a generic virtio device to our structure */
126 /* the config->del_vqs() implementation */
128 /* the config->find_vqs() implementation */
136  * - force the affinity for per vq vector
137  * - OR over all affinities for shared MSI
138  * - ignore the affinity request if we're using INTX
150 	return -ENODEV;  in virtio_pci_legacy_probe()
168 /* Unlike modern drivers which support hardware virtio devices, legacy drivers
169  * assume software-based devices: e.g. they don't use proper memory barriers