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Update VirtIO definitions from Linux virtio_config.h and virtio_ring.h headers

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This commit is contained in:
Bryan Venteicher 2018-06-17 20:45:48 +00:00
parent 9cd818a3f4
commit 56f63b7364
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=335305
2 changed files with 37 additions and 7 deletions
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37
sys/dev/virtio/virtio_config.h
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@ -33,35 +33,58 @@
/* Status byte for guest to report progress. */
#define VIRTIO_CONFIG_STATUS_RESET 0x00
/* We have seen device and processed generic fields. */
#define VIRTIO_CONFIG_STATUS_ACK 0x01
#define VIRTIO_CONFIG_STATUS_DRIVER 0x03
/* We have found a driver for the device. */
#define VIRTIO_CONFIG_STATUS_DRIVER 0x02
/* Driver has used its parts of the config, and is happy. */
#define VIRTIO_CONFIG_STATUS_DRIVER_OK 0x04
/* Driver has finished configuring features (modern only). */
#define VIRTIO_CONFIG_S_FEATURES_OK 0x08
/* Device entered invalid state, driver must reset it. */
#define VIRTIO_CONFIG_S_NEEDS_RESET 0x40
/* We've given up on this device. */
#define VIRTIO_CONFIG_STATUS_FAILED 0x80
/*
* Generate interrupt when the virtqueue ring is
* completely used, even if we've suppressed them.
*/
#define VIRTIO_F_NOTIFY_ON_EMPTY (1 << 24)
#define VIRTIO_F_NOTIFY_ON_EMPTY (1UL << 24)
/* Can the device handle any descriptor layout? */
#define VIRTIO_F_ANY_LAYOUT (1UL << 27)
/* Support for indirect buffer descriptors. */
#define VIRTIO_RING_F_INDIRECT_DESC (1 << 28)
#define VIRTIO_RING_F_INDIRECT_DESC (1UL << 28)
/* Support to suppress interrupt until specific index is reached. */
#define VIRTIO_RING_F_EVENT_IDX (1 << 29)
#define VIRTIO_RING_F_EVENT_IDX (1UL << 29)
/*
* The guest should never negotiate this feature; it
* is used to detect faulty drivers.
*/
#define VIRTIO_F_BAD_FEATURE (1 << 30)
#define VIRTIO_F_BAD_FEATURE (1UL << 30)
/* v1.0 compliant. */
#define VIRTIO_F_VERSION_1 (1ULL << 32)
/*
* Some VirtIO feature bits (currently bits 28 through 31) are
* If clear - device has the IOMMU bypass quirk feature.
* If set - use platform tools to detect the IOMMU.
*
* Note the reverse polarity (compared to most other features),
* this is for compatibility with legacy systems.
*/
#define VIRTIO_F_IOMMU_PLATFORM (1ULL << 33)
/*
* Some VirtIO feature bits (currently bits 28 through 34) are
* reserved for the transport being used (eg. virtio_ring), the
* rest are per-device feature bits.
*/
#define VIRTIO_TRANSPORT_F_START 28
#define VIRTIO_TRANSPORT_F_END 32
#define VIRTIO_TRANSPORT_F_END 34
#endif /* _VIRTIO_CONFIG_H_ */

7
sys/dev/virtio/virtio_ring.h
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@ -92,6 +92,13 @@ struct vring {
struct vring_used *used;
};
/* Alignment requirements for vring elements.
* When using pre-virtio 1.0 layout, these fall out naturally.
*/
#define VRING_AVAIL_ALIGN_SIZE 2
#define VRING_USED_ALIGN_SIZE 4
#define VRING_DESC_ALIGN_SIZE 16
/* The standard layout for the ring is a continuous chunk of memory which
* looks like this. We assume num is a power of 2.
*