Differential D15768 Diff 43732 head/usr.sbin/bhyve/virtio.h

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head/usr.sbin/bhyve/virtio.h

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	* QNOTIFY is effectively write-only: when the guest writes a queue			* QNOTIFY is effectively write-only: when the guest writes a queue
	* number to the register, the hypervisor should scan the specified			* number to the register, the hypervisor should scan the specified
	* virtqueue. (Reading QNOTIFY currently always gets 0).			* virtqueue. (Reading QNOTIFY currently always gets 0).
	*/			*/

	/*			/*
	* PFN register shift amount			* PFN register shift amount
	*/			*/
	#define VRING_PFN 12			#define VRING_PFN 12

	/*			/*
	* Virtio device types			* Virtio device types
	*			*
	* XXX Should really be merged with <dev/virtio/virtio.h> defines			* XXX Should really be merged with <dev/virtio/virtio.h> defines
	*/			*/
	#define VIRTIO_TYPE_NET 1			#define VIRTIO_TYPE_NET 1
	#define VIRTIO_TYPE_BLOCK 2			#define VIRTIO_TYPE_BLOCK 2
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	* PCI config space constants.			* PCI config space constants.
	*			*
	* If MSI-X is enabled, the ISR register is generally not used,			* If MSI-X is enabled, the ISR register is generally not used,
	* and the configuration vector and queue vector appear at offsets			* and the configuration vector and queue vector appear at offsets
	* 20 and 22 with the remaining configuration registers at 24.			* 20 and 22 with the remaining configuration registers at 24.
	* If MSI-X is not enabled, those two registers disappear and			* If MSI-X is not enabled, those two registers disappear and
	* the remaining configuration registers start at offset 20.			* the remaining configuration registers start at offset 20.
	*/			*/
	#define VTCFG_R_HOSTCAP 0			#define VTCFG_R_HOSTCAP 0
	#define VTCFG_R_GUESTCAP 4			#define VTCFG_R_GUESTCAP 4
	#define VTCFG_R_PFN 8			#define VTCFG_R_PFN 8
	#define VTCFG_R_QNUM 12			#define VTCFG_R_QNUM 12
	#define VTCFG_R_QSEL 14			#define VTCFG_R_QSEL 14
	#define VTCFG_R_QNOTIFY 16			#define VTCFG_R_QNOTIFY 16
	#define VTCFG_R_STATUS 18			#define VTCFG_R_STATUS 18
	#define VTCFG_R_ISR 19			#define VTCFG_R_ISR 19
	#define VTCFG_R_CFGVEC 20			#define VTCFG_R_CFGVEC 20
	#define VTCFG_R_QVEC 22			#define VTCFG_R_QVEC 22
	#define VTCFG_R_CFG0 20 /* No MSI-X */			#define VTCFG_R_CFG0 20 /* No MSI-X */
	#define VTCFG_R_CFG1 24 /* With MSI-X */			#define VTCFG_R_CFG1 24 /* With MSI-X */
	#define VTCFG_R_MSIX 20			#define VTCFG_R_MSIX 20

	/*			/*
	* Bits in VTCFG_R_STATUS. Guests need not actually set any of these,			* Bits in VTCFG_R_STATUS. Guests need not actually set any of these,
	* but a guest writing 0 to this register means "please reset".			* but a guest writing 0 to this register means "please reset".
	*/			*/
	#define VTCFG_STATUS_ACK 0x01 /* guest OS has acknowledged dev */			#define VTCFG_STATUS_ACK 0x01 /* guest OS has acknowledged dev */
	#define VTCFG_STATUS_DRIVER 0x02 /* guest OS driver is loaded */			#define VTCFG_STATUS_DRIVER 0x02 /* guest OS driver is loaded */
	#define VTCFG_STATUS_DRIVER_OK 0x04 /* guest OS driver ready */			#define VTCFG_STATUS_DRIVER_OK 0x04 /* guest OS driver ready */
	#define VTCFG_STATUS_FAILED 0x80 /* guest has given up on this dev */			#define VTCFG_STATUS_FAILED 0x80 /* guest has given up on this dev */

	/*			/*
	* Bits in VTCFG_R_ISR. These apply only if not using MSI-X.			* Bits in VTCFG_R_ISR. These apply only if not using MSI-X.
	*			*
	* (We don't [yet?] ever use CONF_CHANGED.)			* (We don't [yet?] ever use CONF_CHANGED.)
	*/			*/
	#define VTCFG_ISR_QUEUES 0x01 /* re-scan queues */			#define VTCFG_ISR_QUEUES 0x01 /* re-scan queues */
	#define VTCFG_ISR_CONF_CHANGED 0x80 /* configuration changed */			#define VTCFG_ISR_CONF_CHANGED 0x80 /* configuration changed */

	#define VIRTIO_MSI_NO_VECTOR 0xFFFF			#define VIRTIO_MSI_NO_VECTOR 0xFFFF

	/*			/*
	* Feature flags.			* Feature flags.
	* Note: bits 0 through 23 are reserved to each device type.			* Note: bits 0 through 23 are reserved to each device type.
	*/			*/
	#define VIRTIO_F_NOTIFY_ON_EMPTY (1 << 24)			#define VIRTIO_F_NOTIFY_ON_EMPTY (1 << 24)
	#define VIRTIO_RING_F_INDIRECT_DESC (1 << 28)			#define VIRTIO_RING_F_INDIRECT_DESC (1 << 28)
	#define VIRTIO_RING_F_EVENT_IDX (1 << 29)			#define VIRTIO_RING_F_EVENT_IDX (1 << 29)
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