uapi/linux/virtio_pci.h

4  * This module allows virtio devices to be used over a virtual PCI device.
12  * This header is BSD licensed so anyone can use the definitions to implement
24  *    may be used to endorse or promote products derived from this software
27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 /* A 32-bit r/o bitmask of the features supported by the host */
49 /* A 32-bit r/w bitmask of features activated by the guest */
52 /* A 32-bit r/w PFN for the currently selected queue */
55 /* A 16-bit r/o queue size for the currently selected queue */
58 /* A 16-bit r/w queue selector */
61 /* A 16-bit r/w queue notifier */
64 /* An 8-bit device status register.  */
67 /* An 8-bit r/o interrupt status register.  Reading the value will return the
69  * a read-and-acknowledge. */
72 /* MSI-X registers: only enabled if MSI-X is enabled. */
73 /* A 16-bit vector for configuration changes. */
75 /* A 16-bit vector for selected queue notifications. */
78 /* The remaining space is defined by each driver as the per-driver
82 #define VIRTIO_PCI_CONFIG(dev)	VIRTIO_PCI_CONFIG_OFF((dev)->msix_enabled)
87 /* How many bits to shift physical queue address written to QUEUE_PFN.
88  * 12 is historical, and due to x86 page size. */
91 /* The alignment to use between consumer and producer parts of vring.
99 /* Vector value used to disable MSI for queue */
125 	__u8 bar;		/* Where to find it. */
127 	__u8 padding[2];	/* Pad to full dword. */
146 	__le32 device_feature_select;	/* read-write */
147 	__le32 device_feature;		/* read-only */
148 	__le32 guest_feature_select;	/* read-write */
149 	__le32 guest_feature;		/* read-write */
150 	__le16 msix_config;		/* read-write */
151 	__le16 num_queues;		/* read-only */
152 	__u8 device_status;		/* read-write */
153 	__u8 config_generation;		/* read-only */
156 	__le16 queue_select;		/* read-write */
157 	__le16 queue_size;		/* read-write, power of 2. */
158 	__le16 queue_msix_vector;	/* read-write */
159 	__le16 queue_enable;		/* read-write */
160 	__le16 queue_notify_off;	/* read-only */
161 	__le32 queue_desc_lo;		/* read-write */
162 	__le32 queue_desc_hi;		/* read-write */
163 	__le32 queue_avail_lo;		/* read-write */
164 	__le32 queue_avail_hi;		/* read-write */
165 	__le32 queue_used_lo;		/* read-write */
166 	__le32 queue_used_hi;		/* read-write */
176 	__le16 queue_notify_data;	/* read-write */
177 	__le16 queue_reset;		/* read-write */
179 	__le16 admin_queue_index;	/* read-only */
180 	__le16 admin_queue_num;		/* read-only */
246 	 * 1 - SR-IOV
247 	 * 2-65535 - reserved
263 	__u8 offset; /* Starting offset of the register(s) to write. */
269 	__u8 offset; /* Starting offset of the register(s) to read. */