#include <vlib/vlib.h>
#include <vlib/unix/unix.h>
+#include <vnet/vnet.h>
#include <vnet/ethernet/ethernet.h>
-#include <vnet/gso/gso.h>
+#include <vnet/gso/gro_func.h>
+#include <vnet/gso/hdr_offset_parser.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/tcp/tcp_packet.h>
_(NO_FREE_SLOTS, "no free tx slots") \
_(TRUNC_PACKET, "packet > buffer size -- truncated in tx ring") \
_(PENDING_MSGS, "pending msgs in tx ring") \
-_(NO_TX_QUEUES, "no tx queues")
+_(INDIRECT_DESC_ALLOC_FAILED, "indirect descriptor allocation failed - packet drop") \
+_(OUT_OF_ORDER, "out-of-order buffers in used ring") \
+_(GSO_PACKET_DROP, "gso disabled on itf -- gso packet drop") \
+_(CSUM_OFFLOAD_PACKET_DROP, "checksum offload disabled on itf -- csum offload packet drop")
typedef enum
{
return s;
}
+typedef struct
+{
+ u32 buffer_index;
+ u32 sw_if_index;
+ generic_header_offset_t gho;
+ vlib_buffer_t buffer;
+} virtio_tx_trace_t;
+
static u8 *
-format_virtio_tx_trace (u8 * s, va_list * args)
+format_virtio_tx_trace (u8 * s, va_list * va)
{
- s = format (s, "Unimplemented...");
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
+ virtio_tx_trace_t *t = va_arg (*va, virtio_tx_trace_t *);
+ u32 indent = format_get_indent (s);
+
+ s = format (s, "%Ubuffer 0x%x: %U\n",
+ format_white_space, indent,
+ t->buffer_index, format_vnet_buffer, &t->buffer);
+ s =
+ format (s, "%U%U\n", format_white_space, indent,
+ format_generic_header_offset, &t->gho);
+ s =
+ format (s, "%U%U", format_white_space, indent,
+ format_ethernet_header_with_length, t->buffer.pre_data,
+ sizeof (t->buffer.pre_data));
return s;
}
static_always_inline void
-virtio_free_used_device_desc (vlib_main_t * vm, virtio_vring_t * vring)
+virtio_tx_trace (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_buffer_t * b0, u32 bi, int is_tun)
+{
+ virtio_tx_trace_t *t;
+ t = vlib_add_trace (vm, node, b0, sizeof (t[0]));
+ t->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
+ t->buffer_index = bi;
+ if (is_tun)
+ {
+ int is_ip4 = 0, is_ip6 = 0;
+
+ switch (((u8 *) vlib_buffer_get_current (b0))[0] & 0xf0)
+ {
+ case 0x40:
+ is_ip4 = 1;
+ break;
+ case 0x60:
+ is_ip6 = 1;
+ break;
+ default:
+ break;
+ }
+ vnet_generic_header_offset_parser (b0, &t->gho, 0, is_ip4, is_ip6);
+ }
+ else
+ vnet_generic_header_offset_parser (b0, &t->gho, 1,
+ b0->flags &
+ VNET_BUFFER_F_IS_IP4,
+ b0->flags & VNET_BUFFER_F_IS_IP6);
+
+ clib_memcpy_fast (&t->buffer, b0, sizeof (*b0) - sizeof (b0->pre_data));
+ clib_memcpy_fast (t->buffer.pre_data, vlib_buffer_get_current (b0),
+ sizeof (t->buffer.pre_data));
+}
+
+static_always_inline void
+virtio_interface_drop_inline (vlib_main_t * vm, uword node_index,
+ u32 * buffers, u16 n,
+ virtio_tx_func_error_t error)
+{
+ vlib_error_count (vm, node_index, error, n);
+ vlib_buffer_free (vm, buffers, n);
+}
+
+static_always_inline void
+virtio_memset_ring_u32 (u32 * ring, u32 start, u32 ring_size, u32 n_buffers)
+{
+ ASSERT (n_buffers <= ring_size);
+
+ if (PREDICT_TRUE (start + n_buffers <= ring_size))
+ {
+ clib_memset_u32 (ring + start, ~0, n_buffers);
+ }
+ else
+ {
+ clib_memset_u32 (ring + start, ~0, ring_size - start);
+ clib_memset_u32 (ring, ~0, n_buffers - (ring_size - start));
+ }
+}
+
+static_always_inline void
+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;
u16 mask = sz - 1;
u16 last = vring->last_used_idx;
u16 n_left = vring->used->idx - last;
+ u16 out_of_order_count = 0;
if (n_left == 0)
return;
while (n_left)
{
- struct vring_used_elem *e = &vring->used->ring[last & mask];
+ vring_used_elem_t *e = &vring->used->ring[last & mask];
u16 slot, n_buffers;
slot = n_buffers = e->id;
- while (e->id == n_buffers)
+ while (e->id == (n_buffers & mask))
{
n_left--;
last++;
n_buffers++;
+ vring_desc_t *d = &vring->desc[e->id];
+ u16 next;
+ while (d->flags & VRING_DESC_F_NEXT)
+ {
+ n_buffers++;
+ next = d->next;
+ d = &vring->desc[next];
+ }
if (n_left == 0)
break;
e = &vring->used->ring[last & mask];
}
vlib_buffer_free_from_ring (vm, vring->buffers, slot,
sz, (n_buffers - slot));
+ virtio_memset_ring_u32 (vring->buffers, slot, sz, (n_buffers - slot));
used -= (n_buffers - slot);
if (n_left > 0)
{
- slot = e->id;
-
- vlib_buffer_free (vm, &vring->buffers[slot], 1);
+ vlib_buffer_free (vm, &vring->buffers[e->id], 1);
+ vring->buffers[e->id] = ~0;
used--;
last++;
n_left--;
+ out_of_order_count++;
+ vring->flags |= VRING_TX_OUT_OF_ORDER;
}
}
+
+ /*
+ * Some vhost-backends give buffers back in out-of-order fashion in used ring.
+ * It impacts the overall virtio-performance.
+ */
+ if (out_of_order_count)
+ vlib_error_count (vm, node_index, VIRTIO_TX_ERROR_OUT_OF_ORDER,
+ out_of_order_count);
+
vring->desc_in_use = used;
vring->last_used_idx = last;
}
static_always_inline void
-set_checksum_offsets (vlib_main_t * vm, virtio_if_t * vif, vlib_buffer_t * b,
- struct virtio_net_hdr_v1 *hdr)
+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)
{
ip4_header_t *ip4;
- gso_header_offset_t gho = vnet_gso_header_offset_parser (b, 0);
+ generic_header_offset_t gho = { 0 };
+ vnet_generic_header_offset_parser (b, &gho, is_l2, 1 /* ip4 */ ,
+ 0 /* ip6 */ );
hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
hdr->csum_start = gho.l4_hdr_offset; // 0x22;
if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
- hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
+ {
+ hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
+ }
else if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
- hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
+ {
+ hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
+ }
/*
* virtio devices do not support IP4 checksum offload. So driver takes care
}
else if (b->flags & VNET_BUFFER_F_IS_IP6)
{
- gso_header_offset_t gho = vnet_gso_header_offset_parser (b, 1);
+ generic_header_offset_t gho = { 0 };
+ vnet_generic_header_offset_parser (b, &gho, is_l2, 0 /* ip4 */ ,
+ 1 /* ip6 */ );
hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
hdr->csum_start = gho.l4_hdr_offset; // 0x36;
if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
- hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
+ {
+ hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
+ }
else if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
- hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
+ {
+ hdr->csum_offset = STRUCT_OFFSET_OF (udp_header_t, checksum);
+ }
+ }
+}
+
+static_always_inline void
+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)
+ {
+ ip4_header_t *ip4;
+ generic_header_offset_t gho = { 0 };
+ vnet_generic_header_offset_parser (b, &gho, is_l2, 1 /* ip4 */ ,
+ 0 /* ip6 */ );
+ hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
+ hdr->gso_size = vnet_buffer2 (b)->gso_size;
+ hdr->hdr_len = gho.hdr_sz;
+ hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
+ hdr->csum_start = gho.l4_hdr_offset; // 0x22;
+ hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
+ ip4 =
+ (ip4_header_t *) (vlib_buffer_get_current (b) + gho.l3_hdr_offset);
+ /*
+ * virtio devices do not support IP4 checksum offload. So driver takes care
+ * of it while doing tx.
+ */
+ if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM)
+ ip4->checksum = ip4_header_checksum (ip4);
+ }
+ else if (b->flags & VNET_BUFFER_F_IS_IP6)
+ {
+ generic_header_offset_t gho = { 0 };
+ vnet_generic_header_offset_parser (b, &gho, is_l2, 0 /* ip4 */ ,
+ 1 /* ip6 */ );
+ hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
+ hdr->gso_size = vnet_buffer2 (b)->gso_size;
+ hdr->hdr_len = gho.hdr_sz;
+ hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
+ hdr->csum_start = gho.l4_hdr_offset; // 0x36;
+ hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
}
}
static_always_inline u16
-add_buffer_to_slot (vlib_main_t * vm, virtio_if_t * vif,
- virtio_vring_t * vring, u32 bi, u16 avail, u16 next,
- u16 mask, int do_gso, int csum_offload)
+add_buffer_to_slot (vlib_main_t * vm, vlib_node_runtime_t * node,
+ virtio_vring_t * vring, u32 bi, u16 free_desc_count,
+ u16 avail, u16 next, u16 mask, 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;
- int hdr_sz = vif->virtio_net_hdr_sz;
- struct vring_desc *d;
+ vring_desc_t *d;
+ int is_l2 = !is_tun;
d = &vring->desc[next];
vlib_buffer_t *b = vlib_get_buffer (vm, bi);
- struct virtio_net_hdr_v1 *hdr = vlib_buffer_get_current (b) - hdr_sz;
+ virtio_net_hdr_v1_t *hdr = vlib_buffer_get_current (b) - hdr_sz;
+ u32 drop_inline = ~0;
- clib_memset (hdr, 0, hdr_sz);
+ clib_memset_u8 (hdr, 0, hdr_sz);
- if (do_gso && (b->flags & VNET_BUFFER_F_GSO))
+ if (b->flags & VNET_BUFFER_F_GSO)
{
- if (b->flags & VNET_BUFFER_F_IS_IP4)
+ if (do_gso)
+ set_gso_offsets (b, hdr, is_l2);
+ else
{
- ip4_header_t *ip4;
- gso_header_offset_t gho = vnet_gso_header_offset_parser (b, 0);
- hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
- hdr->gso_size = vnet_buffer2 (b)->gso_size;
- hdr->hdr_len = gho.l4_hdr_offset + gho.l4_hdr_sz;
- hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
- hdr->csum_start = gho.l4_hdr_offset; // 0x22;
- hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
- ip4 =
- (ip4_header_t *) (vlib_buffer_get_current (b) +
- gho.l3_hdr_offset);
- /*
- * virtio devices do not support IP4 checksum offload. So driver takes care
- * of it while doing tx.
- */
- if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM)
- ip4->checksum = ip4_header_checksum (ip4);
+ drop_inline = VIRTIO_TX_ERROR_GSO_PACKET_DROP;
+ goto done;
}
- else if (b->flags & VNET_BUFFER_F_IS_IP6)
+ }
+ 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
{
- gso_header_offset_t gho = vnet_gso_header_offset_parser (b, 1);
- hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
- hdr->gso_size = vnet_buffer2 (b)->gso_size;
- hdr->hdr_len = gho.l4_hdr_offset + gho.l4_hdr_sz;
- hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
- hdr->csum_start = gho.l4_hdr_offset; // 0x36;
- hdr->csum_offset = STRUCT_OFFSET_OF (tcp_header_t, checksum);
+ drop_inline = VIRTIO_TX_ERROR_CSUM_OFFLOAD_PACKET_DROP;
+ goto done;
}
}
- else if (csum_offload
- && (b->flags & (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
- VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)))
+
+ if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
{
- set_checksum_offsets (vm, vif, b, hdr);
+ virtio_tx_trace (vm, node, b, bi, is_tun);
}
if (PREDICT_TRUE ((b->flags & VLIB_BUFFER_NEXT_PRESENT) == 0))
{
- d->addr =
- ((vif->type == VIRTIO_IF_TYPE_PCI) ? vlib_buffer_get_current_pa (vm,
- b) :
- pointer_to_uword (vlib_buffer_get_current (b))) - hdr_sz;
+ 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;
d->flags = 0;
}
- else
+ else if (is_indirect)
{
/*
* We are using single vlib_buffer_t for indirect descriptor(s)
*/
u32 indirect_buffer = 0;
if (PREDICT_FALSE (vlib_buffer_alloc (vm, &indirect_buffer, 1) == 0))
- return n_added;
+ {
+ 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->next_buffer = bi;
bi = indirect_buffer;
- struct vring_desc *id =
- (struct vring_desc *) vlib_buffer_get_current (indirect_desc);
+ vring_desc_t *id =
+ (vring_desc_t *) vlib_buffer_get_current (indirect_desc);
u32 count = 1;
- if (vif->type == VIRTIO_IF_TYPE_PCI)
+ if (is_pci)
{
d->addr = vlib_physmem_get_pa (vm, id);
id->addr = vlib_buffer_get_current_pa (vm, b) - hdr_sz;
* should be presented in separate descriptor and data will start
* from next descriptor.
*/
- if (PREDICT_TRUE
- (vif->features & VIRTIO_FEATURE (VIRTIO_F_ANY_LAYOUT)))
+ if (is_any_layout)
id->len = b->current_length + hdr_sz;
else
{
id->len = b->current_length;
}
}
- else /* VIRTIO_IF_TYPE_TAP */
+ else /* VIRTIO_IF_TYPE_[TAP | TUN] */
{
d->addr = pointer_to_uword (id);
/* first buffer in chain */
}
id->flags = 0;
id->next = 0;
- d->len = count * sizeof (struct vring_desc);
+ d->len = count * sizeof (vring_desc_t);
d->flags = VRING_DESC_F_INDIRECT;
}
+ else if (is_pci)
+ {
+ u16 count = next;
+ vlib_buffer_t *b_temp = b;
+ u16 n_buffers_in_chain = 1;
+
+ /*
+ * Check the length of the chain for the required number of
+ * descriptors. Return from here, retry to get more descriptors,
+ * if chain length is greater than available descriptors.
+ */
+ while (b_temp->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ n_buffers_in_chain++;
+ b_temp = vlib_get_buffer (vm, b_temp->next_buffer);
+ }
+
+ if (n_buffers_in_chain > free_desc_count)
+ return n_buffers_in_chain;
+
+ d->addr = vlib_buffer_get_current_pa (vm, b) - hdr_sz;
+ d->len = b->current_length + hdr_sz;
+
+ while (b->flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ d->flags = VRING_DESC_F_NEXT;
+ vring->buffers[count] = bi;
+ b->flags &=
+ ~(VLIB_BUFFER_NEXT_PRESENT | VLIB_BUFFER_TOTAL_LENGTH_VALID);
+ bi = b->next_buffer;
+ b->next_buffer = 0;
+ n_added++;
+ count = (count + 1) & mask;
+ d->next = count;
+ d = &vring->desc[count];
+ b = vlib_get_buffer (vm, bi);
+ d->addr = vlib_buffer_get_current_pa (vm, b);
+ d->len = b->current_length;
+ }
+ d->flags = 0;
+ vring->buffers[count] = bi;
+ vring->avail->ring[avail & mask] = next;
+ n_added++;
+ return n_added;
+ }
+ else
+ {
+ ASSERT (0);
+ }
vring->buffers[next] = bi;
vring->avail->ring[avail & mask] = next;
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 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_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * frame, virtio_if_t * vif,
- int do_gso, int csum_offload)
+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)
{
- u16 n_left = frame->n_vectors;
- virtio_vring_t *vring;
- u16 qid = vm->thread_index % vif->num_txqs;
- vring = vec_elt_at_index (vif->txq_vrings, qid);
- u16 used, next, avail;
+ 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 mask = sz - 1;
- u32 *buffers = vlib_frame_vector_args (frame);
+ u16 used, next, n_buffers = 0, n_buffers_left = 0;
+ u16 n_vectors = n_left;
- clib_spinlock_lock_if_init (&vring->lockp);
- if ((vring->used->flags & VIRTIO_RING_FLAG_MASK_INT) == 0 &&
- (vring->last_kick_avail_idx != vring->avail->idx))
- virtio_kick (vm, vring, vif);
+ used = vring->desc_in_use;
+ next = vring->desc_next;
- /* free consumed buffers */
- virtio_free_used_device_desc (vm, vring);
+ 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,
+ u16 * free_desc_count)
+{
+ u16 start = 0;
+ /* next is used as hint: from where to start looking */
+ for (u16 i = 0; i < size; i++, next++)
+ {
+ if (vring->buffers[next & mask] == ~0)
+ {
+ if (*first_free_desc_index == ~0)
+ {
+ *first_free_desc_index = (next & mask);
+ start = i;
+ (*free_desc_count)++;
+ req--;
+ if (req == 0)
+ break;
+ }
+ else
+ {
+ if (start + *free_desc_count == i)
+ {
+ (*free_desc_count)++;
+ req--;
+ if (req == 0)
+ break;
+ }
+ else
+ break;
+ }
+ }
+ }
+}
+
+static_always_inline u16
+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);
+ 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);
+ u16 sz = vring->size;
+ int hdr_sz = vif->virtio_net_hdr_sz;
+ u16 mask = sz - 1;
+ u16 n_vectors = n_left;
used = vring->desc_in_use;
next = vring->desc_next;
avail = vring->avail->idx;
- while (n_left && used < sz)
+ u16 free_desc_count = 0;
+
+ if (PREDICT_FALSE (vring->flags & VRING_TX_OUT_OF_ORDER))
+ {
+ u32 first_free_desc_index = ~0;
+
+ virtio_find_free_desc (vring, sz, mask, n_left, next,
+ &first_free_desc_index, &free_desc_count);
+
+ if (free_desc_count)
+ next = first_free_desc_index;
+ }
+ else
+ free_desc_count = sz - used;
+
+ if (vif->packet_buffering)
+ {
+ n_buffers = n_buffers_left = virtio_vring_n_buffers (vring->buffering);
+
+ while (n_buffers_left && free_desc_count)
+ {
+ u16 n_added = 0;
+
+ u32 bi = virtio_vring_buffering_read_from_front (vring->buffering);
+ if (bi == ~0)
+ break;
+
+ n_added = add_buffer_to_slot (vm, node, vring, bi, free_desc_count,
+ avail, next, mask, hdr_sz, do_gso,
+ csum_offload, is_pci, is_tun,
+ is_indirect, is_any_layout);
+ if (PREDICT_FALSE (n_added == 0))
+ {
+ n_buffers_left--;
+ continue;
+ }
+ else if (PREDICT_FALSE (n_added > free_desc_count))
+ break;
+
+ avail++;
+ next = (next + n_added) & mask;
+ used += n_added;
+ n_buffers_left--;
+ free_desc_count -= n_added;
+ }
+ }
+
+ while (n_left && free_desc_count)
{
u16 n_added = 0;
- n_added =
- add_buffer_to_slot (vm, vif, vring, buffers[0], avail, next, mask,
- do_gso, csum_offload);
- if (!n_added)
+
+ n_added = add_buffer_to_slot (vm, node, vring, buffers[0],
+ free_desc_count, avail, next, mask,
+ hdr_sz, do_gso, csum_offload, is_pci,
+ is_tun, is_indirect, is_any_layout);
+
+ if (PREDICT_FALSE (n_added == 0))
+ {
+ buffers++;
+ n_left--;
+ continue;
+ }
+ else if (PREDICT_FALSE (n_added > free_desc_count))
break;
- avail += n_added;
+
+ avail++;
next = (next + n_added) & mask;
used += n_added;
buffers++;
n_left--;
+ free_desc_count -= n_added;
}
- if (n_left != frame->n_vectors)
+ if (n_left != n_vectors || n_buffers != n_buffers_left)
{
CLIB_MEMORY_STORE_BARRIER ();
vring->avail->idx = avail;
vring->desc_next = next;
vring->desc_in_use = used;
- if ((vring->used->flags & VIRTIO_RING_FLAG_MASK_INT) == 0)
+ if ((vring->used->flags & VRING_USED_F_NO_NOTIFY) == 0)
virtio_kick (vm, vring, vif);
}
- if (n_left)
- {
- vlib_error_count (vm, node->node_index, VIRTIO_TX_ERROR_NO_FREE_SLOTS,
- n_left);
- vlib_buffer_free (vm, buffers, n_left);
- }
+ return n_left;
+}
- clib_spinlock_unlock_if_init (&vring->lockp);
+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 */ );
+}
- return frame->n_vectors - n_left;
+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, 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, 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, packed,
+ 0 /* no do_gso */ ,
+ 1 /* checksum offload */ );
+ else
+ return virtio_interface_tx_gso_inline (vm, node, vif, type, vring,
+ buffers, n_left, packed,
+ 0 /* no do_gso */ ,
+ 0 /* no checksum offload */ );
}
VNET_DEVICE_CLASS_TX_FN (virtio_device_class) (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
- vnet_main_t *vnm = vnet_get_main ();
virtio_main_t *nm = &virtio_main;
vnet_interface_output_runtime_t *rund = (void *) node->runtime_data;
virtio_if_t *vif = pool_elt_at_index (nm->interfaces, rund->dev_instance);
- vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index);
+ u16 qid = vm->thread_index % vif->num_txqs;
+ virtio_vring_t *vring = vec_elt_at_index (vif->txq_vrings, qid);
+ 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;
- if (hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
- return virtio_interface_tx_inline (vm, node, frame, vif, 1 /* do_gso */ ,
- 1);
- else if (hw->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
- return virtio_interface_tx_inline (vm, node, frame, vif,
- 0 /* no do_gso */ , 1);
+ clib_spinlock_lock_if_init (&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->packet_coalesce)
+ {
+ n_left = vnet_gro_inline (vm, vring->flow_table, buffers, n_left, to);
+ buffers = to;
+ }
+
+ u16 retry_count = 2;
+
+retry:
+ /* free consumed buffers */
+ 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, 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, 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, packed);
else
- return virtio_interface_tx_inline (vm, node, frame, vif,
- 0 /* no do_gso */ , 0);
+ ASSERT (0);
+
+ if (n_left && retry_count--)
+ goto retry;
+
+ if (vif->packet_buffering && n_left)
+ {
+ u16 n_buffered = virtio_vring_buffering_store_packets (vring->buffering,
+ &buffers
+ [frame->n_vectors
+ - n_left],
+ n_left);
+ buffers += n_buffered;
+ n_left -= n_buffered;
+ }
+ if (n_left)
+ virtio_interface_drop_inline (vm, node->node_index,
+ &buffers[frame->n_vectors - n_left], n_left,
+ VIRTIO_TX_ERROR_NO_FREE_SLOTS);
+
+ clib_spinlock_unlock_if_init (&vring->lockp);
+
+ return frame->n_vectors - n_left;
}
static void
static clib_error_t *
virtio_interface_rx_mode_change (vnet_main_t * vnm, u32 hw_if_index, u32 qid,
- vnet_hw_interface_rx_mode mode)
+ vnet_hw_if_rx_mode mode)
{
+ vlib_main_t *vm = vnm->vlib_main;
virtio_main_t *mm = &virtio_main;
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
virtio_if_t *vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
- virtio_vring_t *vring = vec_elt_at_index (vif->rxq_vrings, qid);
+ virtio_vring_t *rx_vring = vec_elt_at_index (vif->rxq_vrings, qid);
if (vif->type == VIRTIO_IF_TYPE_PCI && !(vif->support_int_mode))
{
- vring->avail->flags |= VIRTIO_RING_FLAG_MASK_INT;
+ rx_vring->avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
return clib_error_return (0, "interrupt mode is not supported");
}
- if (mode == VNET_HW_INTERFACE_RX_MODE_POLLING)
- vring->avail->flags |= VIRTIO_RING_FLAG_MASK_INT;
+ if (mode == VNET_HW_IF_RX_MODE_POLLING)
+ {
+ if (vif->packet_coalesce || vif->packet_buffering)
+ {
+ if (mm->interrupt_queues_count > 0)
+ mm->interrupt_queues_count--;
+ if (mm->interrupt_queues_count == 0)
+ vlib_process_signal_event (vm,
+ virtio_send_interrupt_node.index,
+ VIRTIO_EVENT_STOP_TIMER, 0);
+ }
+ rx_vring->avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
+ }
else
- vring->avail->flags &= ~VIRTIO_RING_FLAG_MASK_INT;
+ {
+ if (vif->packet_coalesce || vif->packet_buffering)
+ {
+ mm->interrupt_queues_count++;
+ if (mm->interrupt_queues_count == 1)
+ vlib_process_signal_event (vm,
+ virtio_send_interrupt_node.index,
+ VIRTIO_EVENT_START_TIMER, 0);
+ }
+ rx_vring->avail->flags &= ~VRING_AVAIL_F_NO_INTERRUPT;
+ }
+
+ rx_vring->mode = mode;
return 0;
}
virtio_if_t *vif = pool_elt_at_index (mm->interfaces, hw->dev_instance);
if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
- vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
+ {
+ vif->flags |= VIRTIO_IF_FLAG_ADMIN_UP;
+ vnet_hw_interface_set_flags (vnm, vif->hw_if_index,
+ VNET_HW_INTERFACE_FLAG_LINK_UP);
+ }
else
- vif->flags &= ~VIRTIO_IF_FLAG_ADMIN_UP;
-
+ {
+ vif->flags &= ~VIRTIO_IF_FLAG_ADMIN_UP;
+ vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0);
+ }
return 0;
}
.subif_add_del_function = virtio_subif_add_del_function,
.rx_mode_change_function = virtio_interface_rx_mode_change,
};
+
/* *INDENT-ON* */
/*
Code Review / vpp.git / blobdiff