uapi/linux/virtio_pci.h

2  * Virtio PCI driver
4  * This module allows virtio devices to be used over a virtual PCI device.
47 /* A 32-bit r/o bitmask of the features supported by the host */
50 /* A 32-bit r/w bitmask of features activated by the guest */
53 /* A 32-bit r/w PFN for the currently selected queue */
56 /* A 16-bit r/o queue size for the currently selected queue */
59 /* A 16-bit r/w queue selector */
62 /* A 16-bit r/w queue notifier */
65 /* An 8-bit device status register.  */
68 /* An 8-bit r/o interrupt status register.  Reading the value will return the
70  * a read-and-acknowledge. */
73 /* MSI-X registers: only enabled if MSI-X is enabled. */
74 /* A 16-bit vector for configuration changes. */
76 /* A 16-bit vector for selected queue notifications. */
79 /* The remaining space is defined by each driver as the per-driver
83 #define VIRTIO_PCI_CONFIG(dev)	VIRTIO_PCI_CONFIG_OFF((dev)->msix_enabled)
85 /* Virtio ABI version, this must match exactly */
115 /* PCI configuration access */
119 /* PCI vendor data configuration */
122 /* This is the PCI capability header: */
124 	__u8 cap_vndr;		/* Generic PCI field: PCI_CAP_ID_VNDR */
125 	__u8 cap_next;		/* Generic PCI field: next ptr. */
126 	__u8 cap_len;		/* Generic PCI field: capability length */
135 /* This is the PCI vendor data capability header: */
137 	__u8 cap_vndr;		/* Generic PCI field: PCI_CAP_ID_VNDR */
138 	__u8 cap_next;		/* Generic PCI field: next ptr. */
139 	__u8 cap_len;		/* Generic PCI field: capability length */
141 	__u16 vendor_id;	/* Identifies the vendor-specific format. */
161 	__le32 device_feature_select;	/* read-write */
162 	__le32 device_feature;		/* read-only */
163 	__le32 guest_feature_select;	/* read-write */
164 	__le32 guest_feature;		/* read-write */
165 	__le16 msix_config;		/* read-write */
166 	__le16 num_queues;		/* read-only */
167 	__u8 device_status;		/* read-write */
168 	__u8 config_generation;		/* read-only */
171 	__le16 queue_select;		/* read-write */
172 	__le16 queue_size;		/* read-write, power of 2. */
173 	__le16 queue_msix_vector;	/* read-write */
174 	__le16 queue_enable;		/* read-write */
175 	__le16 queue_notify_off;	/* read-only */
176 	__le32 queue_desc_lo;		/* read-write */
177 	__le32 queue_desc_hi;		/* read-write */
178 	__le32 queue_avail_lo;		/* read-write */
179 	__le32 queue_avail_hi;		/* read-write */
180 	__le32 queue_used_lo;		/* read-write */
181 	__le32 queue_used_hi;		/* read-write */
191 	__le16 queue_notify_data;	/* read-write */
192 	__le16 queue_reset;		/* read-write */
194 	__le16 admin_queue_index;	/* read-only */
195 	__le16 admin_queue_num;		/* read-only */
273 	 * 1 - SR-IOV
274 	 * 2-65535 - reserved