diff options
Diffstat (limited to 'qemu/roms/SLOF/lib/libvirtio/virtio.h')
| -rw-r--r-- | qemu/roms/SLOF/lib/libvirtio/virtio.h | 58 |
1 files changed, 48 insertions, 10 deletions
diff --git a/qemu/roms/SLOF/lib/libvirtio/virtio.h b/qemu/roms/SLOF/lib/libvirtio/virtio.h index d5759b45a..0fee4baec 100644 --- a/qemu/roms/SLOF/lib/libvirtio/virtio.h +++ b/qemu/roms/SLOF/lib/libvirtio/virtio.h @@ -14,13 +14,23 @@ #define _LIBVIRTIO_H #include <stdint.h> +#include <stdbool.h> /* Device status bits */ #define VIRTIO_STAT_ACKNOWLEDGE 1 #define VIRTIO_STAT_DRIVER 2 #define VIRTIO_STAT_DRIVER_OK 4 +#define VIRTIO_STAT_FEATURES_OK 8 +#define VIRTIO_STAT_NEEDS_RESET 64 #define VIRTIO_STAT_FAILED 128 +#define BIT(x) (1UL << (x)) + +/* VIRTIO 1.0 Device independent feature bits */ +#define VIRTIO_F_RING_INDIRECT_DESC BIT(28) +#define VIRTIO_F_RING_EVENT_IDX BIT(29) +#define VIRTIO_F_VERSION_1 BIT(32) + #define VIRTIO_TIMEOUT 5000 /* 5 sec timeout */ /* Definitions for vring_desc.flags */ @@ -34,7 +44,7 @@ struct vring_desc { uint32_t len; /* Length */ uint16_t flags; /* The flags as indicated above */ uint16_t next; /* Next field if flags & NEXT */ -}; +}; /* Definitions for vring_avail.flags */ #define VRING_AVAIL_F_NO_INTERRUPT 1 @@ -44,8 +54,7 @@ struct vring_avail { uint16_t flags; uint16_t idx; uint16_t ring[]; -}; - +}; /* Definitions for vring_used.flags */ #define VRING_USED_F_NO_NOTIFY 1 @@ -61,27 +70,56 @@ struct vring_used { struct vring_used_elem ring[]; }; -#define VIRTIO_TYPE_PCI 0 /* For virtio-pci interface */ +/* Structure shared with SLOF and is 16bytes */ +struct virtio_cap { + void *addr; + uint8_t bar; + uint8_t is_io; + uint8_t cap_id; +}; + struct virtio_device { - void *base; /* base address */ - int type; /* VIRTIO_TYPE_PCI or VIRTIO_TYPE_VIO */ + uint32_t is_modern; /* Indicates whether to use virtio 1.0 */ + struct virtio_cap legacy; + struct virtio_cap common; + struct virtio_cap notify; + struct virtio_cap isr; + struct virtio_cap device; + struct virtio_cap pci; + uint32_t notify_off_mul; +}; + +struct vqs { + uint64_t id; /* Queue ID */ + uint32_t size; + void *buf_mem; + struct vring_desc *desc; + struct vring_avail *avail; + struct vring_used *used; }; /* Parts of the virtqueue are aligned on a 4096 byte page boundary */ #define VQ_ALIGN(addr) (((addr) + 0xfff) & ~0xfff) extern unsigned long virtio_vring_size(unsigned int qsize); -extern int virtio_get_qsize(struct virtio_device *dev, int queue); +extern unsigned int virtio_get_qsize(struct virtio_device *dev, int queue); extern struct vring_desc *virtio_get_vring_desc(struct virtio_device *dev, int queue); extern struct vring_avail *virtio_get_vring_avail(struct virtio_device *dev, int queue); extern struct vring_used *virtio_get_vring_used(struct virtio_device *dev, int queue); +extern void virtio_fill_desc(struct vring_desc *desc, bool is_modern, + uint64_t addr, uint32_t len, + uint16_t flags, uint16_t next); +extern int virtio_queue_init_vq(struct virtio_device *dev, struct vqs *vq, unsigned int id); +extern struct virtio_device *virtio_setup_vd(void); extern void virtio_reset_device(struct virtio_device *dev); extern void virtio_queue_notify(struct virtio_device *dev, int queue); extern void virtio_set_status(struct virtio_device *dev, int status); -extern void virtio_set_qaddr(struct virtio_device *dev, int queue, unsigned int qaddr); -extern void virtio_set_guest_features(struct virtio_device *dev, int features); -extern void virtio_get_host_features(struct virtio_device *dev, int *features); +extern void virtio_get_status(struct virtio_device *dev, int *status); +extern void virtio_set_qaddr(struct virtio_device *dev, int queue, unsigned long qaddr); +extern void virtio_set_guest_features(struct virtio_device *dev, uint64_t features); +extern uint64_t virtio_get_host_features(struct virtio_device *dev); +extern int virtio_negotiate_guest_features(struct virtio_device *dev, uint64_t features); extern uint64_t virtio_get_config(struct virtio_device *dev, int offset, int size); extern int __virtio_read_config(struct virtio_device *dev, void *dst, int offset, int len); |