}
static_always_inline void
-virtio_refill_vring (vlib_main_t * vm, virtio_if_t * vif,
- virtio_if_type_t type, virtio_vring_t * vring,
- const int hdr_sz, u32 node_index)
+virtio_refill_vring_split (vlib_main_t * vm, virtio_if_t * vif,
+ virtio_if_type_t type, virtio_vring_t * vring,
+ const int hdr_sz, u32 node_index)
{
u16 used, next, avail, n_slots, n_refill;
u16 sz = vring->size;
goto more;
}
+static_always_inline void
+virtio_refill_vring_packed (vlib_main_t * vm, virtio_if_t * vif,
+ virtio_if_type_t type, virtio_vring_t * vring,
+ const int hdr_sz, u32 node_index)
+{
+ u16 used, next, n_slots, n_refill, flags = 0, first_desc_flags;
+ u16 sz = vring->size;
+
+more:
+ used = vring->desc_in_use;
+
+ if (sz == used)
+ return;
+
+ /* deliver free buffers in chunks of 64 */
+ n_refill = clib_min (sz - used, 64);
+
+ next = vring->desc_next;
+ first_desc_flags = vring->packed_desc[next].flags;
+ n_slots =
+ vlib_buffer_alloc_to_ring_from_pool (vm, vring->buffers, next,
+ sz, n_refill,
+ vring->buffer_pool_index);
+
+ if (PREDICT_FALSE (n_slots != n_refill))
+ {
+ vlib_error_count (vm, node_index,
+ VIRTIO_INPUT_ERROR_BUFFER_ALLOC, n_refill - n_slots);
+ if (n_slots == 0)
+ return;
+ }
+
+ while (n_slots)
+ {
+ vring_packed_desc_t *d = &vring->packed_desc[next];
+ vlib_buffer_t *b = vlib_get_buffer (vm, vring->buffers[next]);
+ /*
+ * current_data may not be initialized with 0 and may contain
+ * previous offset. Here we want to make sure, it should be 0
+ * initialized.
+ */
+ b->current_data = -hdr_sz;
+ memset (vlib_buffer_get_current (b), 0, hdr_sz);
+ d->addr =
+ ((type == VIRTIO_IF_TYPE_PCI) ? vlib_buffer_get_current_pa (vm,
+ b) :
+ pointer_to_uword (vlib_buffer_get_current (b)));
+ d->len = vlib_buffer_get_default_data_size (vm) + hdr_sz;
+
+ if (vring->avail_wrap_counter)
+ flags = (VRING_DESC_F_AVAIL | VRING_DESC_F_WRITE);
+ else
+ flags = (VRING_DESC_F_USED | VRING_DESC_F_WRITE);
+
+ d->id = next;
+ if (vring->desc_next == next)
+ first_desc_flags = flags;
+ else
+ d->flags = flags;
+
+ next++;
+ if (next >= sz)
+ {
+ next = 0;
+ vring->avail_wrap_counter ^= 1;
+ }
+ n_slots--;
+ used++;
+ }
+ CLIB_MEMORY_STORE_BARRIER ();
+ vring->packed_desc[vring->desc_next].flags = first_desc_flags;
+ vring->desc_next = next;
+ vring->desc_in_use = used;
+ CLIB_MEMORY_BARRIER ();
+ if (vring->device_event->flags != VRING_EVENT_F_DISABLE)
+ {
+ virtio_kick (vm, vring, vif);
+ }
+
+ goto more;
+}
+
static_always_inline void
virtio_needs_csum (vlib_buffer_t * b0, virtio_net_hdr_v1_t * hdr,
u8 * l4_proto, u8 * l4_hdr_sz, virtio_if_type_t type)
}
}
+static_always_inline u16
+virtio_n_left_to_process (virtio_vring_t * vring, const int packed)
+{
+ if (packed)
+ return vring->desc_in_use;
+ else
+ return vring->used->idx - vring->last_used_idx;
+}
+
+static_always_inline u16
+virtio_get_slot_id (virtio_vring_t * vring, const int packed, u16 last,
+ u16 mask)
+{
+ if (packed)
+ return vring->packed_desc[last].id;
+ else
+ return vring->used->ring[last & mask].id;
+}
+
+static_always_inline u16
+virtio_get_len (virtio_vring_t * vring, const int packed, const int hdr_sz,
+ u16 last, u16 mask)
+{
+ if (packed)
+ return vring->packed_desc[last].len - hdr_sz;
+ else
+ return vring->used->ring[last & mask].len - hdr_sz;
+}
+
+#define increment_last(last, packed, vring) \
+ do { \
+ last++; \
+ if (packed && last >= vring->size) \
+ { \
+ last = 0; \
+ vring->used_wrap_counter ^= 1; \
+ } \
+ } while (0)
+
static_always_inline uword
virtio_device_input_gso_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame, virtio_if_t * vif,
virtio_vring_t * vring, virtio_if_type_t type,
- int gso_enabled, int checksum_offload_enabled)
+ int gso_enabled, int checksum_offload_enabled,
+ int packed)
{
vnet_main_t *vnm = vnet_get_main ();
u32 thread_index = vm->thread_index;
u32 n_rx_bytes = 0;
u16 mask = vring->size - 1;
u16 last = vring->last_used_idx;
- u16 n_left = vring->used->idx - last;
+ u16 n_left = virtio_n_left_to_process (vring, packed);
vlib_buffer_t bt;
if (n_left == 0)
while (n_left && n_left_to_next)
{
+ if (packed)
+ {
+ vring_packed_desc_t *d = &vring->packed_desc[last];
+ u16 flags = d->flags;
+ if ((flags & VRING_DESC_F_AVAIL) !=
+ (vring->used_wrap_counter << 7)
+ || (flags & VRING_DESC_F_USED) !=
+ (vring->used_wrap_counter << 15))
+ {
+ n_left = 0;
+ break;
+ }
+ }
u8 l4_proto = 0, l4_hdr_sz = 0;
u16 num_buffers = 1;
- vring_used_elem_t *e = &vring->used->ring[last & mask];
virtio_net_hdr_v1_t *hdr;
- u16 slot = e->id;
- u16 len = e->len - hdr_sz;
+ u16 slot = virtio_get_slot_id (vring, packed, last, mask);
+ u16 len = virtio_get_len (vring, packed, hdr_sz, last, mask);
u32 bi0 = vring->buffers[slot];
vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
hdr = vlib_buffer_get_current (b0);
b0->total_length_not_including_first_buffer = 0;
while (num_buffers > 1)
{
- last++;
- e = &vring->used->ring[last & mask];
- u32 cbi = vring->buffers[e->id];
+ increment_last (last, packed, vring);
+ u16 cslot = virtio_get_slot_id (vring, packed, last, mask);
+ u16 clen =
+ virtio_get_len (vring, packed, hdr_sz, last, mask);
+ u32 cbi = vring->buffers[cslot];
cb = vlib_get_buffer (vm, cbi);
/* current buffer */
- cb->current_length = e->len;
+ cb->current_length = clen;
/* previous buffer */
pb->next_buffer = cbi;
pb->flags |= VLIB_BUFFER_NEXT_PRESENT;
/* first buffer */
- b0->total_length_not_including_first_buffer += e->len;
+ b0->total_length_not_including_first_buffer += clen;
pb = cb;
vring->desc_in_use--;
to_next += 1;
n_left_to_next--;
n_left--;
- last++;
+ increment_last (last, packed, vring);
/* only tun interfaces may have different next index */
if (type == VIRTIO_IF_TYPE_TUN)
clib_spinlock_unlock_if_init (&txq_vring->lockp);
}
- if ((vring->used->flags & VRING_USED_F_NO_NOTIFY) == 0 &&
- vring->last_kick_avail_idx != vring->avail->idx)
- virtio_kick (vm, vring, vif);
+ if (vif->is_packed)
+ {
+ if (vring->device_event->flags != VRING_EVENT_F_DISABLE)
+ virtio_kick (vm, vring, vif);
+
+ if (vif->gso_enabled)
+ rv =
+ virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
+ 1, 1, 1);
+ else if (vif->csum_offload_enabled)
+ rv =
+ virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
+ 0, 1, 1);
+ else
+ rv =
+ virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
+ 0, 0, 1);
- if (vif->gso_enabled)
- rv = virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
- 1, 1);
- else if (vif->csum_offload_enabled)
- rv = virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
- 0, 1);
+ virtio_refill_vring_packed (vm, vif, type, vring, hdr_sz,
+ node->node_index);
+ }
else
- rv = virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
- 0, 0);
+ {
+ if ((vring->used->flags & VRING_USED_F_NO_NOTIFY) == 0 &&
+ vring->last_kick_avail_idx != vring->avail->idx)
+ virtio_kick (vm, vring, vif);
+
+ if (vif->gso_enabled)
+ rv =
+ virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
+ 1, 1, 0);
+ else if (vif->csum_offload_enabled)
+ rv =
+ virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
+ 0, 1, 0);
+ else
+ rv =
+ virtio_device_input_gso_inline (vm, node, frame, vif, vring, type,
+ 0, 0, 0);
- virtio_refill_vring (vm, vif, type, vring, hdr_sz, node->node_index);
+ virtio_refill_vring_split (vm, vif, type, vring, hdr_sz,
+ node->node_index);
+ }
return rv;
}
Code Review / vpp.git / blobdiff