}
static_always_inline void
-virtio_free_used_device_desc (vlib_main_t * vm, virtio_vring_t * vring,
- uword node_index)
+virtio_free_used_device_desc_split (vlib_main_t * vm, virtio_vring_t * vring,
+ uword node_index)
{
u16 used = vring->desc_in_use;
u16 sz = vring->size;
}
static_always_inline void
-set_checksum_offsets (vlib_buffer_t * b, virtio_net_hdr_v1_t * hdr, int is_l2)
+virtio_free_used_device_desc_packed (vlib_main_t * vm, virtio_vring_t * vring,
+ uword node_index)
+{
+ vring_packed_desc_t *d;
+ u16 sz = vring->size;
+ u16 last = vring->last_used_idx;
+ u16 n_buffers = 0, start;
+ u16 flags;
+
+ if (vring->desc_in_use == 0)
+ return;
+
+ d = &vring->packed_desc[last];
+ flags = d->flags;
+ start = d->id;
+
+ while ((flags & VRING_DESC_F_AVAIL) == (vring->used_wrap_counter << 7) &&
+ (flags & VRING_DESC_F_USED) == (vring->used_wrap_counter << 15))
+ {
+ last++;
+ n_buffers++;
+
+ if (last >= sz)
+ {
+ last = 0;
+ vring->used_wrap_counter ^= 1;
+ }
+ d = &vring->packed_desc[last];
+ flags = d->flags;
+ }
+
+ if (n_buffers)
+ {
+ vlib_buffer_free_from_ring (vm, vring->buffers, start, sz, n_buffers);
+ virtio_memset_ring_u32 (vring->buffers, start, sz, n_buffers);
+ vring->desc_in_use -= n_buffers;
+ vring->last_used_idx = last;
+ }
+}
+
+static_always_inline void
+virtio_free_used_device_desc (vlib_main_t * vm, virtio_vring_t * vring,
+ uword node_index, int packed)
+{
+ if (packed)
+ virtio_free_used_device_desc_packed (vm, vring, node_index);
+ else
+ virtio_free_used_device_desc_split (vm, vring, node_index);
+
+}
+
+static_always_inline void
+set_checksum_offsets (vlib_buffer_t * b, virtio_net_hdr_v1_t * hdr,
+ const int is_l2)
{
if (b->flags & VNET_BUFFER_F_IS_IP4)
{
}
static_always_inline void
-set_gso_offsets (vlib_buffer_t * b, virtio_net_hdr_v1_t * hdr, int is_l2)
+set_gso_offsets (vlib_buffer_t * b, virtio_net_hdr_v1_t * hdr,
+ const int is_l2)
{
if (b->flags & VNET_BUFFER_F_IS_IP4)
{
return n_added;
}
+static_always_inline u16
+add_buffer_to_slot_packed (vlib_main_t * vm, vlib_node_runtime_t * node,
+ virtio_vring_t * vring, u32 bi, u16 next,
+ int hdr_sz, int do_gso, int csum_offload,
+ int is_pci, int is_tun, int is_indirect,
+ int is_any_layout)
+{
+ u16 n_added = 0, flags = 0;
+ int is_l2 = !is_tun;
+ vring_packed_desc_t *d = &vring->packed_desc[next];
+ vlib_buffer_t *b = vlib_get_buffer (vm, bi);
+ virtio_net_hdr_v1_t *hdr = vlib_buffer_get_current (b) - hdr_sz;
+ u32 drop_inline = ~0;
+
+ clib_memset (hdr, 0, hdr_sz);
+
+ if (b->flags & VNET_BUFFER_F_GSO)
+ {
+ if (do_gso)
+ set_gso_offsets (b, hdr, is_l2);
+ else
+ {
+ drop_inline = VIRTIO_TX_ERROR_GSO_PACKET_DROP;
+ goto done;
+ }
+ }
+ else if (b->flags & (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
+ VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))
+ {
+ if (csum_offload)
+ set_checksum_offsets (b, hdr, is_l2);
+ else
+ {
+ drop_inline = VIRTIO_TX_ERROR_CSUM_OFFLOAD_PACKET_DROP;
+ goto done;
+ }
+ }
+ if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ virtio_tx_trace (vm, node, b, bi, is_tun);
+ }
+
+ if (PREDICT_TRUE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) == 0))
+ {
+ d->addr =
+ ((is_pci) ? vlib_buffer_get_current_pa (vm,
+ b) :
+ pointer_to_uword (vlib_buffer_get_current (b))) - hdr_sz;
+ d->len = b->current_length + hdr_sz;
+ }
+ else if (is_indirect)
+ {
+ /*
+ * We are using single vlib_buffer_t for indirect descriptor(s)
+ * chain. Single descriptor is 16 bytes and vlib_buffer_t
+ * has 2048 bytes space. So maximum long chain can have 128
+ * (=2048/16) indirect descriptors.
+ * It can easily support 65535 bytes of Jumbo frames with
+ * each data buffer size of 512 bytes minimum.
+ */
+ u32 indirect_buffer = 0;
+ if (PREDICT_FALSE (vlib_buffer_alloc (vm, &indirect_buffer, 1) == 0))
+ {
+ drop_inline = VIRTIO_TX_ERROR_INDIRECT_DESC_ALLOC_FAILED;
+ goto done;
+ }
+
+ vlib_buffer_t *indirect_desc = vlib_get_buffer (vm, indirect_buffer);
+ indirect_desc->current_data = 0;
+ indirect_desc->flags |= VLIB_BUFFER_NEXT_PRESENT;
+ indirect_desc->next_buffer = bi;
+ bi = indirect_buffer;
+
+ vring_packed_desc_t *id =
+ (vring_packed_desc_t *) vlib_buffer_get_current (indirect_desc);
+ u32 count = 1;
+ if (is_pci)
+ {
+ d->addr = vlib_physmem_get_pa (vm, id);
+ id->addr = vlib_buffer_get_current_pa (vm, b) - hdr_sz;
+
+ /*
+ * If VIRTIO_F_ANY_LAYOUT is not negotiated, then virtio_net_hdr
+ * should be presented in separate descriptor and data will start
+ * from next descriptor.
+ */
+ if (is_any_layout)
+ id->len = b->current_length + hdr_sz;
+ else
+ {
+ id->len = hdr_sz;
+ id->flags = 0;
+ id->id = 0;
+ count++;
+ id++;
+ id->addr = vlib_buffer_get_current_pa (vm, b);
+ id->len = b->current_length;
+ }
+ while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ id->flags = 0;
+ id->id = 0;
+ count++;
+ id++;
+ b = vlib_get_buffer (vm, b->next_buffer);
+ id->addr = vlib_buffer_get_current_pa (vm, b);
+ id->len = b->current_length;
+ }
+ }
+ id->flags = 0;
+ id->id = 0;
+ d->len = count * sizeof (vring_packed_desc_t);
+ flags = VRING_DESC_F_INDIRECT;
+ }
+ else
+ {
+ ASSERT (0);
+ }
+ if (vring->avail_wrap_counter)
+ {
+ flags |= VRING_DESC_F_AVAIL;
+ flags &= ~VRING_DESC_F_USED;
+ }
+ else
+ {
+ flags &= ~VRING_DESC_F_AVAIL;
+ flags |= VRING_DESC_F_USED;
+ }
+
+ d->id = next;
+ d->flags = flags;
+ vring->buffers[next] = bi;
+ n_added++;
+
+done:
+ if (drop_inline != ~0)
+ virtio_interface_drop_inline (vm, node->node_index, &bi, 1, drop_inline);
+
+ return n_added;
+}
+
+static_always_inline uword
+virtio_interface_tx_packed_gso_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ virtio_if_t * vif,
+ virtio_if_type_t type,
+ virtio_vring_t * vring,
+ u32 * buffers, u16 n_left,
+ const int do_gso,
+ const int csum_offload)
+{
+ int is_pci = (type == VIRTIO_IF_TYPE_PCI);
+ int is_tun = (type == VIRTIO_IF_TYPE_TUN);
+ int is_indirect =
+ ((vif->features & VIRTIO_FEATURE (VIRTIO_RING_F_INDIRECT_DESC)) != 0);
+ int is_any_layout =
+ ((vif->features & VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT)) != 0);
+ const int hdr_sz = vif->virtio_net_hdr_sz;
+ u16 sz = vring->size;
+ u16 used, next, n_buffers = 0, n_buffers_left = 0;
+ u16 n_vectors = n_left;
+
+
+ used = vring->desc_in_use;
+ next = vring->desc_next;
+
+ if (vif->packet_buffering)
+ {
+ n_buffers = n_buffers_left = virtio_vring_n_buffers (vring->buffering);
+
+ while (n_buffers_left && used < sz)
+ {
+ u16 n_added = 0;
+
+ u32 bi = virtio_vring_buffering_read_from_front (vring->buffering);
+ if (bi == ~0)
+ break;
+ n_added = add_buffer_to_slot_packed (vm, node,
+ vring, bi, next,
+ hdr_sz, do_gso, csum_offload,
+ is_pci, is_tun, is_indirect,
+ is_any_layout);
+ n_buffers_left--;
+ if (PREDICT_FALSE (n_added == 0))
+ continue;
+
+ used++;
+ next++;
+ if (next >= sz)
+ {
+ next = 0;
+ vring->avail_wrap_counter ^= 1;
+ }
+ }
+ }
+
+ while (n_left && used < sz)
+ {
+ u16 n_added = 0;
+
+ n_added = add_buffer_to_slot_packed (vm, node,
+ vring, buffers[0], next,
+ hdr_sz, do_gso, csum_offload,
+ is_pci, is_tun, is_indirect,
+ is_any_layout);
+ buffers++;
+ n_left--;
+ if (PREDICT_FALSE (n_added == 0))
+ continue;
+
+ used++;
+ next++;
+ if (next >= sz)
+ {
+ next = 0;
+ vring->avail_wrap_counter ^= 1;
+ }
+ }
+
+ if (n_left != n_vectors || n_buffers != n_buffers_left)
+ {
+ CLIB_MEMORY_STORE_BARRIER ();
+ 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);
+ }
+
+ return n_left;
+}
+
static_always_inline void
virtio_find_free_desc (virtio_vring_t * vring, u16 size, u16 mask,
u16 req, u16 next, u32 * first_free_desc_index,
}
static_always_inline u16
-virtio_interface_tx_gso_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
- virtio_if_t * vif,
- virtio_if_type_t type, virtio_vring_t * vring,
- u32 * buffers, u16 n_left, int do_gso,
- int csum_offload)
+virtio_interface_tx_split_gso_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ virtio_if_t * vif,
+ virtio_if_type_t type,
+ virtio_vring_t * vring, u32 * buffers,
+ u16 n_left, int do_gso,
+ int csum_offload)
{
u16 used, next, avail, n_buffers = 0, n_buffers_left = 0;
int is_pci = (type == VIRTIO_IF_TYPE_PCI);
return n_left;
}
+static_always_inline u16
+virtio_interface_tx_gso_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
+ virtio_if_t * vif,
+ virtio_if_type_t type, virtio_vring_t * vring,
+ u32 * buffers, u16 n_left, int packed,
+ int do_gso, int csum_offload)
+{
+ if (packed)
+ return virtio_interface_tx_packed_gso_inline (vm, node, vif, type, vring,
+ buffers, n_left,
+ 1 /* do_gso */ ,
+ 1 /* checksum offload */ );
+ else
+ return virtio_interface_tx_split_gso_inline (vm, node, vif, type, vring,
+ buffers, n_left,
+ 1 /* do_gso */ ,
+ 1 /* checksum offload */ );
+}
+
static_always_inline u16
virtio_interface_tx_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
virtio_if_t * vif,
virtio_vring_t * vring, virtio_if_type_t type,
- u32 * buffers, u16 n_left)
+ u32 * buffers, u16 n_left, int packed)
{
vnet_main_t *vnm = vnet_get_main ();
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
if (hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
return virtio_interface_tx_gso_inline (vm, node, vif, type, vring,
- buffers, n_left, 1 /* do_gso */ ,
+ buffers, n_left, packed,
+ 1 /* do_gso */ ,
1 /* checksum offload */ );
else if (hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
return virtio_interface_tx_gso_inline (vm, node, vif, type, vring,
- buffers, n_left,
+ buffers, n_left, packed,
0 /* no do_gso */ ,
1 /* checksum offload */ );
else
return virtio_interface_tx_gso_inline (vm, node, vif, type, vring,
- buffers, n_left,
+ buffers, n_left, packed,
0 /* no do_gso */ ,
0 /* no checksum offload */ );
}
u16 n_left = frame->n_vectors;
u32 *buffers = vlib_frame_vector_args (frame);
u32 to[GRO_TO_VECTOR_SIZE (n_left)];
+ int packed = vif->is_packed;
clib_spinlock_lock_if_init (&vring->lockp);
retry:
/* free consumed buffers */
- virtio_free_used_device_desc (vm, vring, node->node_index);
+ virtio_free_used_device_desc (vm, vring, node->node_index, packed);
if (vif->type == VIRTIO_IF_TYPE_TAP)
n_left = virtio_interface_tx_inline (vm, node, vif, vring,
VIRTIO_IF_TYPE_TAP,
&buffers[frame->n_vectors - n_left],
- n_left);
+ n_left, packed);
else if (vif->type == VIRTIO_IF_TYPE_PCI)
n_left = virtio_interface_tx_inline (vm, node, vif, vring,
VIRTIO_IF_TYPE_PCI,
&buffers[frame->n_vectors - n_left],
- n_left);
+ n_left, packed);
else if (vif->type == VIRTIO_IF_TYPE_TUN)
n_left = virtio_interface_tx_inline (vm, node, vif, vring,
VIRTIO_IF_TYPE_TUN,
&buffers[frame->n_vectors - n_left],
- n_left);
+ n_left, packed);
else
ASSERT (0);
Code Review / vpp.git / blobdiff