drivers/virtio/virtio_pci.h

1 /* SPDX-License-Identifier: BSD-3-Clause */
13 /* A 32-bit r/o bitmask of the features supported by the host */
16 /* A 32-bit r/w bitmask of features activated by the guest */
19 /* A 32-bit r/w PFN for the currently selected queue */
22 /* A 16-bit r/o queue size for the currently selected queue */
25 /* A 16-bit r/w queue selector */
28 /* A 16-bit r/w queue notifier */
31 /* An 8-bit device status register */
35  * An 8-bit r/o interrupt status register. Reading the value will return the
37  * a read-and-acknowledge.
41 /* MSI-X registers: only enabled if MSI-X is enabled */
43 /* A 16-bit vector for configuration changes */
45 /* A 16-bit vector for selected queue notifications */
49  * The remaining space is defined by each driver as the per-driver
111 	__le32 device_feature_select;	/* read-write */
112 	__le32 device_feature;		/* read-only */
113 	__le32 guest_feature_select;	/* read-write */
114 	__le32 guest_feature;		/* read-write */
115 	__le16 msix_config;		/* read-write */
116 	__le16 num_queues;		/* read-only */
117 	__u8 device_status;		/* read-write */
118 	__u8 config_generation;		/* read-only */
121 	__le16 queue_select;		/* read-write */
122 	__le16 queue_size;		/* read-write, power of 2 */
123 	__le16 queue_msix_vector;	/* read-write */
124 	__le16 queue_enable;		/* read-write */
125 	__le16 queue_notify_off;	/* read-only */
126 	__le32 queue_desc_lo;		/* read-write */
127 	__le32 queue_desc_hi;		/* read-write */
128 	__le32 queue_avail_lo;		/* read-write */
129 	__le32 queue_avail_hi;		/* read-write */
130 	__le32 queue_used_lo;		/* read-write */
131 	__le32 queue_used_hi;		/* read-write */