include/hw/virtio/dataplane/vring-accessors.h

   1 #ifndef VRING_ACCESSORS_H
   2 #define VRING_ACCESSORS_H
   3
   4 #include "standard-headers/linux/virtio_ring.h"
   5 #include "hw/virtio/virtio.h"
   6 #include "hw/virtio/virtio-access.h"
   7
   8 static inline uint16_t vring_get_used_idx(VirtIODevice *vdev, Vring *vring)
   9 {
  10     return virtio_tswap16(vdev, vring->vr.used->idx);
  11 }
  12
  13 static inline void vring_set_used_idx(VirtIODevice *vdev, Vring *vring,
  14                                       uint16_t idx)
  15 {
  16     vring->vr.used->idx = virtio_tswap16(vdev, idx);
  17 }
  18
  19 static inline uint16_t vring_get_avail_idx(VirtIODevice *vdev, Vring *vring)
  20 {
  21     return virtio_tswap16(vdev, vring->vr.avail->idx);
  22 }
  23
  24 static inline uint16_t vring_get_avail_ring(VirtIODevice *vdev, Vring *vring,
  25                                             int i)
  26 {
  27     return virtio_tswap16(vdev, vring->vr.avail->ring[i]);
  28 }
  29
  30 static inline void vring_set_used_ring_id(VirtIODevice *vdev, Vring *vring,
  31                                           int i, uint32_t id)
  32 {
  33     vring->vr.used->ring[i].id = virtio_tswap32(vdev, id);
  34 }
  35
  36 static inline void vring_set_used_ring_len(VirtIODevice *vdev, Vring *vring,
  37                                           int i, uint32_t len)
  38 {
  39     vring->vr.used->ring[i].len = virtio_tswap32(vdev, len);
  40 }
  41
  42 static inline uint16_t vring_get_used_flags(VirtIODevice *vdev, Vring *vring)
  43 {
  44     return virtio_tswap16(vdev, vring->vr.used->flags);
  45 }
  46
  47 static inline uint16_t vring_get_avail_flags(VirtIODevice *vdev, Vring *vring)
  48 {
  49     return virtio_tswap16(vdev, vring->vr.avail->flags);
  50 }
  51
  52 static inline void vring_set_used_flags(VirtIODevice *vdev, Vring *vring,
  53                                         uint16_t flags)
  54 {
  55     vring->vr.used->flags |= virtio_tswap16(vdev, flags);
  56 }
  57
  58 static inline void vring_clear_used_flags(VirtIODevice *vdev, Vring *vring,
  59                                           uint16_t flags)
  60 {
  61     vring->vr.used->flags &= virtio_tswap16(vdev, ~flags);
  62 }
  63
  64 static inline unsigned int vring_get_num(Vring *vring)
  65 {
  66     return vring->vr.num;
  67 }
  68
  69 /* Are there more descriptors available? */
  70 static inline bool vring_more_avail(VirtIODevice *vdev, Vring *vring)
  71 {
  72     return vring_get_avail_idx(vdev, vring) != vring->last_avail_idx;
  73 }
  74
  75 #endif