#undef _
};
-always_inline int
-vlib_buffer_is_ip4 (vlib_buffer_t * b)
-{
- ethernet_header_t *h = (ethernet_header_t *) b->data;
- return (h->type == clib_host_to_net_u16 (ETHERNET_TYPE_IP4));
-}
+STATIC_ASSERT (VNET_DEVICE_INPUT_NEXT_IP4_INPUT - 1 ==
+ VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT,
+ "IP4_INPUT must follow IP4_NCS_INPUT");
-always_inline int
-vlib_buffer_is_ip6 (vlib_buffer_t * b)
+enum
{
- ethernet_header_t *h = (ethernet_header_t *) b->data;
- return (h->type == clib_host_to_net_u16 (ETHERNET_TYPE_IP6));
-}
+ DPDK_RX_F_CKSUM_GOOD = 7,
+ DPDK_RX_F_CKSUM_BAD = 4,
+ DPDK_RX_F_FDIR = 2,
+};
-always_inline int
-vlib_buffer_is_mpls (vlib_buffer_t * b)
-{
- ethernet_header_t *h = (ethernet_header_t *) b->data;
- return (h->type == clib_host_to_net_u16 (ETHERNET_TYPE_MPLS_UNICAST));
-}
+/* currently we are just copying bit positions from DPDK, but that
+ might change in future, in case we start to be interested in something
+ stored in upper bytes. Currently we store only lower byte for perf reasons */
+STATIC_ASSERT (1 << DPDK_RX_F_CKSUM_GOOD == PKT_RX_IP_CKSUM_GOOD, "");
+STATIC_ASSERT (1 << DPDK_RX_F_CKSUM_BAD == PKT_RX_IP_CKSUM_BAD, "");
+STATIC_ASSERT (1 << DPDK_RX_F_FDIR == PKT_RX_FDIR, "");
+STATIC_ASSERT ((PKT_RX_IP_CKSUM_GOOD | PKT_RX_IP_CKSUM_BAD | PKT_RX_FDIR) <
+ 256, "dpdk flags not un lower byte, fix needed");
always_inline u32
-dpdk_rx_next_from_etype (struct rte_mbuf * mb, vlib_buffer_t * b0)
+dpdk_rx_next (vlib_node_runtime_t * node, u16 etype, u8 flags)
{
- if (PREDICT_TRUE (vlib_buffer_is_ip4 (b0)))
- if (PREDICT_TRUE ((mb->ol_flags & PKT_RX_IP_CKSUM_GOOD) != 0))
- return VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT;
- else
- return VNET_DEVICE_INPUT_NEXT_IP4_INPUT;
- else if (PREDICT_TRUE (vlib_buffer_is_ip6 (b0)))
+ if (PREDICT_TRUE (etype == clib_host_to_net_u16 (ETHERNET_TYPE_IP4)))
+ {
+ /* keep it branchless */
+ u32 is_good = (flags >> DPDK_RX_F_CKSUM_GOOD) & 1;
+ return VNET_DEVICE_INPUT_NEXT_IP4_INPUT - is_good;
+ }
+ else if (PREDICT_TRUE (etype == clib_host_to_net_u16 (ETHERNET_TYPE_IP6)))
return VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
- else if (PREDICT_TRUE (vlib_buffer_is_mpls (b0)))
+ else if (PREDICT_TRUE (etype == clib_host_to_net_u16 (ETHERNET_TYPE_MPLS)))
return VNET_DEVICE_INPUT_NEXT_MPLS_INPUT;
else
return VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
}
-always_inline int
-dpdk_mbuf_is_vlan (struct rte_mbuf *mb)
-{
- return (mb->packet_type & RTE_PTYPE_L2_ETHER_VLAN) ==
- RTE_PTYPE_L2_ETHER_VLAN;
-}
-
-always_inline int
-dpdk_mbuf_is_ip4 (struct rte_mbuf *mb)
-{
- return RTE_ETH_IS_IPV4_HDR (mb->packet_type) != 0;
-}
-
-always_inline int
-dpdk_mbuf_is_ip6 (struct rte_mbuf *mb)
-{
- return RTE_ETH_IS_IPV6_HDR (mb->packet_type) != 0;
-}
-
-always_inline u32
-dpdk_rx_next_from_mb (struct rte_mbuf * mb, vlib_buffer_t * b0)
-{
- if (PREDICT_FALSE (dpdk_mbuf_is_vlan (mb)))
- return VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
- else if (PREDICT_TRUE (dpdk_mbuf_is_ip4 (mb)))
- return VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT;
- else if (PREDICT_TRUE (dpdk_mbuf_is_ip6 (mb)))
- return VNET_DEVICE_INPUT_NEXT_IP6_INPUT;
- else if (PREDICT_TRUE (vlib_buffer_is_mpls (b0)))
- return VNET_DEVICE_INPUT_NEXT_MPLS_INPUT;
- else
- return dpdk_rx_next_from_etype (mb, b0);
-}
-
-always_inline void
-dpdk_rx_error_from_mb (struct rte_mbuf *mb, u32 * next, u8 * error)
-{
- if (mb->ol_flags & PKT_RX_IP_CKSUM_BAD)
- {
- *error = DPDK_ERROR_IP_CHECKSUM_ERROR;
- *next = VNET_DEVICE_INPUT_NEXT_DROP;
- }
- else
- *error = DPDK_ERROR_NONE;
-}
-
-void
-dpdk_rx_trace (dpdk_main_t * dm,
- vlib_node_runtime_t * node,
- dpdk_device_t * xd,
- u16 queue_id, u32 * buffers, uword n_buffers)
-{
- vlib_main_t *vm = vlib_get_main ();
- u32 *b, n_left;
- u32 next0;
-
- n_left = n_buffers;
- b = buffers;
-
- while (n_left >= 1)
- {
- u32 bi0;
- vlib_buffer_t *b0;
- dpdk_rx_dma_trace_t *t0;
- struct rte_mbuf *mb;
- u8 error0;
-
- bi0 = b[0];
- n_left -= 1;
-
- b0 = vlib_get_buffer (vm, bi0);
- mb = rte_mbuf_from_vlib_buffer (b0);
-
- if (PREDICT_FALSE (xd->per_interface_next_index != ~0))
- next0 = xd->per_interface_next_index;
- else if (PREDICT_TRUE
- ((xd->flags & DPDK_DEVICE_FLAG_PMD_SUPPORTS_PTYPE) != 0))
- next0 = dpdk_rx_next_from_mb (mb, b0);
- else
- next0 = dpdk_rx_next_from_etype (mb, b0);
-
- dpdk_rx_error_from_mb (mb, &next0, &error0);
-
- vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 0);
- t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
- t0->queue_index = queue_id;
- t0->device_index = xd->device_index;
- t0->buffer_index = bi0;
-
- clib_memcpy (&t0->mb, mb, sizeof (t0->mb));
- clib_memcpy (&t0->buffer, b0, sizeof (b0[0]) - sizeof (b0->pre_data));
- clib_memcpy (t0->buffer.pre_data, b0->data,
- sizeof (t0->buffer.pre_data));
- clib_memcpy (&t0->data, mb->buf_addr + mb->data_off, sizeof (t0->data));
-
- b += 1;
- }
-}
-
-static inline u32
-dpdk_rx_burst (dpdk_main_t * dm, dpdk_device_t * xd, u16 queue_id)
-{
- u32 n_buffers;
- u32 n_left;
- u32 n_this_chunk;
-
- n_left = VLIB_FRAME_SIZE;
- n_buffers = 0;
-
- if (PREDICT_TRUE (xd->flags & DPDK_DEVICE_FLAG_PMD))
- {
- while (n_left)
- {
- n_this_chunk = rte_eth_rx_burst (xd->device_index, queue_id,
- xd->rx_vectors[queue_id] +
- n_buffers, n_left);
- n_buffers += n_this_chunk;
- n_left -= n_this_chunk;
-
- /* Empirically, DPDK r1.8 produces vectors w/ 32 or fewer elts */
- if (n_this_chunk < 32)
- break;
- }
- }
- else
- {
- ASSERT (0);
- }
-
- return n_buffers;
-}
-
-
-static_always_inline void
+static_always_inline uword
dpdk_process_subseq_segs (vlib_main_t * vm, vlib_buffer_t * b,
- struct rte_mbuf *mb, vlib_buffer_free_list_t * fl)
+ struct rte_mbuf * mb, vlib_buffer_free_list_t * fl)
{
u8 nb_seg = 1;
struct rte_mbuf *mb_seg = 0;
mb_seg = mb->next;
b_chain = b;
- while ((mb->nb_segs > 1) && (nb_seg < mb->nb_segs))
+ if (mb->nb_segs < 2)
+ return 0;
+
+ b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
+ b->total_length_not_including_first_buffer = 0;
+
+ while (nb_seg < mb->nb_segs)
{
ASSERT (mb_seg != 0);
mb_seg = mb_seg->next;
nb_seg++;
}
+ return b->total_length_not_including_first_buffer;
}
static_always_inline void
-dpdk_prefetch_buffer (struct rte_mbuf *mb)
+dpdk_prefetch_mbuf_x4 (struct rte_mbuf *mb[])
{
- vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
- CLIB_PREFETCH (mb, CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (mb[0], CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (mb[1], CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (mb[2], CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (mb[3], CLIB_CACHE_LINE_BYTES, LOAD);
}
-/*
- * This function is used when there are no worker threads.
- * The main thread performs IO and forwards the packets.
- */
-static_always_inline u32
-dpdk_device_input (dpdk_main_t * dm, dpdk_device_t * xd,
- vlib_node_runtime_t * node, u32 cpu_index, u16 queue_id)
+static_always_inline void
+dpdk_prefetch_buffer_x4 (struct rte_mbuf *mb[])
{
- u32 n_buffers;
- u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
- u32 n_left_to_next, *to_next;
- u32 mb_index;
- vlib_main_t *vm = vlib_get_main ();
- uword n_rx_bytes = 0;
- u32 n_trace, trace_cnt __attribute__ ((unused));
- vlib_buffer_free_list_t *fl;
- u32 buffer_flags_template;
+ vlib_buffer_t *b;
+ b = vlib_buffer_from_rte_mbuf (mb[0]);
+ CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, LOAD);
+ b = vlib_buffer_from_rte_mbuf (mb[1]);
+ CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, LOAD);
+ b = vlib_buffer_from_rte_mbuf (mb[2]);
+ CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, LOAD);
+ b = vlib_buffer_from_rte_mbuf (mb[3]);
+ CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, LOAD);
+}
- if ((xd->flags & DPDK_DEVICE_FLAG_ADMIN_UP) == 0)
- return 0;
+static_always_inline void
+dpdk_prefetch_buffer_data_x4 (struct rte_mbuf *mb[])
+{
+ vlib_buffer_t *b;
+ b = vlib_buffer_from_rte_mbuf (mb[0]);
+ CLIB_PREFETCH (b->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ b = vlib_buffer_from_rte_mbuf (mb[1]);
+ CLIB_PREFETCH (b->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ b = vlib_buffer_from_rte_mbuf (mb[2]);
+ CLIB_PREFETCH (b->data, CLIB_CACHE_LINE_BYTES, LOAD);
+ b = vlib_buffer_from_rte_mbuf (mb[3]);
+ CLIB_PREFETCH (b->data, CLIB_CACHE_LINE_BYTES, LOAD);
+}
- n_buffers = dpdk_rx_burst (dm, xd, queue_id);
+/** \brief Main DPDK input node
+ @node dpdk-input
- if (n_buffers == 0)
- {
- return 0;
- }
+ This is the main DPDK input node: across each assigned interface,
+ call rte_eth_rx_burst(...) or similar to obtain a vector of
+ packets to process. Derive @c vlib_buffer_t metadata from
+ <code>struct rte_mbuf</code> metadata,
+ Depending on the resulting metadata: adjust <code>b->current_data,
+ b->current_length </code> and dispatch directly to
+ ip4-input-no-checksum, or ip6-input. Trace the packet if required.
- buffer_flags_template = dm->buffer_flags_template;
+ @param vm vlib_main_t corresponding to the current thread
+ @param node vlib_node_runtime_t
+ @param f vlib_frame_t input-node, not used.
- vec_reset_length (xd->d_trace_buffers[cpu_index]);
- trace_cnt = n_trace = vlib_get_trace_count (vm, node);
+ @par Graph mechanics: buffer metadata, next index usage
- if (n_trace > 0)
- {
- u32 n = clib_min (n_trace, n_buffers);
- mb_index = 0;
+ @em Uses:
+ - <code>struct rte_mbuf mb->ol_flags</code>
+ - PKT_RX_IP_CKSUM_BAD
- while (n--)
- {
- struct rte_mbuf *mb = xd->rx_vectors[queue_id][mb_index++];
- vlib_buffer_t *b = vlib_buffer_from_rte_mbuf (mb);
- vec_add1 (xd->d_trace_buffers[cpu_index],
- vlib_get_buffer_index (vm, b));
- }
+ @em Sets:
+ - <code>b->error</code> if the packet is to be dropped immediately
+ - <code>b->current_data, b->current_length</code>
+ - adjusted as needed to skip the L2 header in direct-dispatch cases
+ - <code>vnet_buffer(b)->sw_if_index[VLIB_RX]</code>
+ - rx interface sw_if_index
+ - <code>vnet_buffer(b)->sw_if_index[VLIB_TX] = ~0</code>
+ - required by ipX-lookup
+ - <code>b->flags</code>
+ - to indicate multi-segment pkts (VLIB_BUFFER_NEXT_PRESENT), etc.
+
+ <em>Next Nodes:</em>
+ - Static arcs to: error-drop, ethernet-input,
+ ip4-input-no-checksum, ip6-input, mpls-input
+ - per-interface redirection, controlled by
+ <code>xd->per_interface_next_index</code>
+*/
+
+static_always_inline u8
+dpdk_ol_flags_extract (struct rte_mbuf **mb, u8 * flags, int count)
+{
+ u8 rv = 0;
+ int i;
+ for (i = 0; i < count; i++)
+ {
+ /* all flags we are interested in are in lower 8 bits but
+ that might change */
+ flags[i] = (u8) mb[i]->ol_flags;
+ rv |= flags[i];
}
+ return rv;
+}
+
+static_always_inline uword
+dpdk_process_rx_burst (vlib_main_t * vm, dpdk_per_thread_data_t * ptd,
+ uword n_rx_packets, int maybe_multiseg, u8 * or_flagsp)
+{
+ u32 n_left = n_rx_packets;
+ vlib_buffer_t *b[4];
+ vlib_buffer_free_list_t *fl;
+ struct rte_mbuf **mb = ptd->mbufs;
+ uword n_bytes = 0;
+ i16 off;
+ u8 *flags, or_flags = 0;
+ u16 *next;
fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
- mb_index = 0;
+ mb = ptd->mbufs;
+ flags = ptd->flags;
+ next = ptd->next;
- while (n_buffers > 0)
+ while (n_left >= 8)
{
- vlib_buffer_t *b0, *b1, *b2, *b3;
- u32 bi0, next0, l3_offset0;
- u32 bi1, next1, l3_offset1;
- u32 bi2, next2, l3_offset2;
- u32 bi3, next3, l3_offset3;
- u8 error0, error1, error2, error3;
- u64 or_ol_flags;
+ CLIB_PREFETCH (mb + 8, CLIB_CACHE_LINE_BYTES, LOAD);
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+ dpdk_prefetch_buffer_x4 (mb + 4);
- while (n_buffers > 8 && n_left_to_next > 4)
- {
- struct rte_mbuf *mb0 = xd->rx_vectors[queue_id][mb_index];
- struct rte_mbuf *mb1 = xd->rx_vectors[queue_id][mb_index + 1];
- struct rte_mbuf *mb2 = xd->rx_vectors[queue_id][mb_index + 2];
- struct rte_mbuf *mb3 = xd->rx_vectors[queue_id][mb_index + 3];
+ b[0] = vlib_buffer_from_rte_mbuf (mb[0]);
+ b[1] = vlib_buffer_from_rte_mbuf (mb[1]);
+ b[2] = vlib_buffer_from_rte_mbuf (mb[2]);
+ b[3] = vlib_buffer_from_rte_mbuf (mb[3]);
- dpdk_prefetch_buffer (xd->rx_vectors[queue_id][mb_index + 4]);
- dpdk_prefetch_buffer (xd->rx_vectors[queue_id][mb_index + 5]);
- dpdk_prefetch_buffer (xd->rx_vectors[queue_id][mb_index + 6]);
- dpdk_prefetch_buffer (xd->rx_vectors[queue_id][mb_index + 7]);
+ clib_memcpy64_x4 (b[0], b[1], b[2], b[3], &ptd->buffer_template);
- if (xd->flags & DPDK_DEVICE_FLAG_MAYBE_MULTISEG)
- {
- if (PREDICT_FALSE (mb0->nb_segs > 1))
- dpdk_prefetch_buffer (mb0->next);
- if (PREDICT_FALSE (mb1->nb_segs > 1))
- dpdk_prefetch_buffer (mb1->next);
- if (PREDICT_FALSE (mb2->nb_segs > 1))
- dpdk_prefetch_buffer (mb2->next);
- if (PREDICT_FALSE (mb3->nb_segs > 1))
- dpdk_prefetch_buffer (mb3->next);
- }
+ dpdk_prefetch_mbuf_x4 (mb + 4);
- ASSERT (mb0);
- ASSERT (mb1);
- ASSERT (mb2);
- ASSERT (mb3);
-
- or_ol_flags = (mb0->ol_flags | mb1->ol_flags |
- mb2->ol_flags | mb3->ol_flags);
- b0 = vlib_buffer_from_rte_mbuf (mb0);
- b1 = vlib_buffer_from_rte_mbuf (mb1);
- b2 = vlib_buffer_from_rte_mbuf (mb2);
- b3 = vlib_buffer_from_rte_mbuf (mb3);
-
- vlib_buffer_init_for_free_list (b0, fl);
- vlib_buffer_init_for_free_list (b1, fl);
- vlib_buffer_init_for_free_list (b2, fl);
- vlib_buffer_init_for_free_list (b3, fl);
-
- bi0 = vlib_get_buffer_index (vm, b0);
- bi1 = vlib_get_buffer_index (vm, b1);
- bi2 = vlib_get_buffer_index (vm, b2);
- bi3 = vlib_get_buffer_index (vm, b3);
-
- to_next[0] = bi0;
- to_next[1] = bi1;
- to_next[2] = bi2;
- to_next[3] = bi3;
- to_next += 4;
- n_left_to_next -= 4;
-
- if (PREDICT_FALSE (xd->per_interface_next_index != ~0))
- {
- next0 = next1 = next2 = next3 = xd->per_interface_next_index;
- }
- else if (PREDICT_TRUE
- ((xd->flags & DPDK_DEVICE_FLAG_PMD_SUPPORTS_PTYPE) != 0))
- {
- next0 = dpdk_rx_next_from_mb (mb0, b0);
- next1 = dpdk_rx_next_from_mb (mb1, b1);
- next2 = dpdk_rx_next_from_mb (mb2, b2);
- next3 = dpdk_rx_next_from_mb (mb3, b3);
- }
- else
- {
- next0 = dpdk_rx_next_from_etype (mb0, b0);
- next1 = dpdk_rx_next_from_etype (mb1, b1);
- next2 = dpdk_rx_next_from_etype (mb2, b2);
- next3 = dpdk_rx_next_from_etype (mb3, b3);
- }
+ or_flags |= dpdk_ol_flags_extract (mb, flags, 4);
+ flags += 4;
- if (PREDICT_FALSE (or_ol_flags & PKT_RX_IP_CKSUM_BAD))
- {
- dpdk_rx_error_from_mb (mb0, &next0, &error0);
- dpdk_rx_error_from_mb (mb1, &next1, &error1);
- dpdk_rx_error_from_mb (mb2, &next2, &error2);
- dpdk_rx_error_from_mb (mb3, &next3, &error3);
- b0->error = node->errors[error0];
- b1->error = node->errors[error1];
- b2->error = node->errors[error2];
- b3->error = node->errors[error3];
- }
- else
- {
- b0->error = b1->error = node->errors[DPDK_ERROR_NONE];
- b2->error = b3->error = node->errors[DPDK_ERROR_NONE];
- }
+ /* we temporary store relative offset of ethertype into next[x]
+ so we can prefetch and get it faster later */
- l3_offset0 = device_input_next_node_advance[next0];
- l3_offset1 = device_input_next_node_advance[next1];
- l3_offset2 = device_input_next_node_advance[next2];
- l3_offset3 = device_input_next_node_advance[next3];
-
- b0->current_data = l3_offset0 + mb0->data_off;
- b1->current_data = l3_offset1 + mb1->data_off;
- b2->current_data = l3_offset2 + mb2->data_off;
- b3->current_data = l3_offset3 + mb3->data_off;
-
- b0->current_data -= RTE_PKTMBUF_HEADROOM;
- b1->current_data -= RTE_PKTMBUF_HEADROOM;
- b2->current_data -= RTE_PKTMBUF_HEADROOM;
- b3->current_data -= RTE_PKTMBUF_HEADROOM;
-
- b0->current_length = mb0->data_len - l3_offset0;
- b1->current_length = mb1->data_len - l3_offset1;
- b2->current_length = mb2->data_len - l3_offset2;
- b3->current_length = mb3->data_len - l3_offset3;
-
- b0->flags = buffer_flags_template;
- b1->flags = buffer_flags_template;
- b2->flags = buffer_flags_template;
- b3->flags = buffer_flags_template;
-
- vnet_buffer (b0)->sw_if_index[VLIB_RX] = xd->vlib_sw_if_index;
- vnet_buffer (b1)->sw_if_index[VLIB_RX] = xd->vlib_sw_if_index;
- vnet_buffer (b2)->sw_if_index[VLIB_RX] = xd->vlib_sw_if_index;
- vnet_buffer (b3)->sw_if_index[VLIB_RX] = xd->vlib_sw_if_index;
-
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- vnet_buffer (b1)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- vnet_buffer (b2)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- vnet_buffer (b3)->sw_if_index[VLIB_TX] = (u32) ~ 0;
-
- n_rx_bytes += mb0->pkt_len;
- n_rx_bytes += mb1->pkt_len;
- n_rx_bytes += mb2->pkt_len;
- n_rx_bytes += mb3->pkt_len;
-
- /* Process subsequent segments of multi-segment packets */
- if (xd->flags & DPDK_DEVICE_FLAG_MAYBE_MULTISEG)
- {
- dpdk_process_subseq_segs (vm, b0, mb0, fl);
- dpdk_process_subseq_segs (vm, b1, mb1, fl);
- dpdk_process_subseq_segs (vm, b2, mb2, fl);
- dpdk_process_subseq_segs (vm, b3, mb3, fl);
- }
+ off = mb[0]->data_off;
+ next[0] = off + STRUCT_OFFSET_OF (ethernet_header_t, type);
+ off -= RTE_PKTMBUF_HEADROOM;
+ vnet_buffer (b[0])->l2_hdr_offset = off;
+ b[0]->current_data = off;
- /*
- * Turn this on if you run into
- * "bad monkey" contexts, and you want to know exactly
- * which nodes they've visited... See main.c...
- */
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b2);
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b3);
-
- /* Do we have any driver RX features configured on the interface? */
- vnet_feature_start_device_input_x4 (xd->vlib_sw_if_index,
- &next0, &next1, &next2, &next3,
- b0, b1, b2, b3,
- l3_offset0, l3_offset1,
- l3_offset2, l3_offset3);
-
- vlib_validate_buffer_enqueue_x4 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, bi1, bi2, bi3,
- next0, next1, next2, next3);
- n_buffers -= 4;
- mb_index += 4;
- }
- while (n_buffers > 0 && n_left_to_next > 0)
- {
- struct rte_mbuf *mb0 = xd->rx_vectors[queue_id][mb_index];
+ off = mb[1]->data_off;
+ next[1] = off + STRUCT_OFFSET_OF (ethernet_header_t, type);
+ off -= RTE_PKTMBUF_HEADROOM;
+ vnet_buffer (b[1])->l2_hdr_offset = off;
+ b[1]->current_data = off;
- ASSERT (mb0);
+ off = mb[2]->data_off;
+ next[2] = off + STRUCT_OFFSET_OF (ethernet_header_t, type);
+ off -= RTE_PKTMBUF_HEADROOM;
+ vnet_buffer (b[2])->l2_hdr_offset = off;
+ b[2]->current_data = off;
- b0 = vlib_buffer_from_rte_mbuf (mb0);
+ off = mb[3]->data_off;
+ next[3] = off + STRUCT_OFFSET_OF (ethernet_header_t, type);
+ off -= RTE_PKTMBUF_HEADROOM;
+ vnet_buffer (b[3])->l2_hdr_offset = off;
+ b[3]->current_data = off;
- /* Prefetch one next segment if it exists. */
- if (PREDICT_FALSE (mb0->nb_segs > 1))
- dpdk_prefetch_buffer (mb0->next);
+ b[0]->current_length = mb[0]->data_len;
+ b[1]->current_length = mb[1]->data_len;
+ b[2]->current_length = mb[2]->data_len;
+ b[3]->current_length = mb[3]->data_len;
- vlib_buffer_init_for_free_list (b0, fl);
+ n_bytes += mb[0]->data_len;
+ n_bytes += mb[1]->data_len;
+ n_bytes += mb[2]->data_len;
+ n_bytes += mb[3]->data_len;
- bi0 = vlib_get_buffer_index (vm, b0);
+ if (maybe_multiseg)
+ {
+ n_bytes += dpdk_process_subseq_segs (vm, b[0], mb[0], fl);
+ n_bytes += dpdk_process_subseq_segs (vm, b[1], mb[1], fl);
+ n_bytes += dpdk_process_subseq_segs (vm, b[2], mb[2], fl);
+ n_bytes += dpdk_process_subseq_segs (vm, b[3], mb[3], fl);
+ }
- to_next[0] = bi0;
- to_next++;
- n_left_to_next--;
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[0]);
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[1]);
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[2]);
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[3]);
+
+ /* next */
+ mb += 4;
+ n_left -= 4;
+ next += 4;
+ }
- if (PREDICT_FALSE (xd->per_interface_next_index != ~0))
- next0 = xd->per_interface_next_index;
- else if (PREDICT_TRUE
- ((xd->flags & DPDK_DEVICE_FLAG_PMD_SUPPORTS_PTYPE) != 0))
- next0 = dpdk_rx_next_from_mb (mb0, b0);
- else
- next0 = dpdk_rx_next_from_etype (mb0, b0);
+ while (n_left)
+ {
+ b[0] = vlib_buffer_from_rte_mbuf (mb[0]);
+ clib_memcpy (b[0], &ptd->buffer_template, 64);
+ or_flags |= dpdk_ol_flags_extract (mb, flags, 1);
+ flags += 1;
+
+ off = mb[0]->data_off;
+ next[0] = off + STRUCT_OFFSET_OF (ethernet_header_t, type);
+ off -= RTE_PKTMBUF_HEADROOM;
+ vnet_buffer (b[0])->l2_hdr_offset = off;
+ b[0]->current_data = off;
+ b[0]->current_length = mb[0]->data_len;
+ n_bytes += mb[0]->data_len;
+ if (maybe_multiseg)
+ n_bytes += dpdk_process_subseq_segs (vm, b[0], mb[0], fl);
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[0]);
+
+ /* next */
+ mb += 1;
+ n_left -= 1;
+ next += 1;
+ }
- dpdk_rx_error_from_mb (mb0, &next0, &error0);
- b0->error = node->errors[error0];
+ *or_flagsp = or_flags;
+ return n_bytes;
+}
- l3_offset0 = device_input_next_node_advance[next0];
+static_always_inline void
+dpdk_set_next_from_etype (vlib_main_t * vm, vlib_node_runtime_t * node,
+ dpdk_per_thread_data_t * ptd, uword n_rx_packets)
+{
+ vlib_buffer_t *b[4];
+ i16 adv[4];
+ u16 etype[4];
+ struct rte_mbuf **mb = ptd->mbufs;
+ u8 *flags = ptd->flags;
+ u16 *next = ptd->next;
+ u32 n_left = n_rx_packets;
+
+ while (n_left >= 12)
+ {
+ dpdk_prefetch_buffer_data_x4 (mb + 8);
+ dpdk_prefetch_buffer_x4 (mb + 8);
+
+ b[0] = vlib_buffer_from_rte_mbuf (mb[0]);
+ b[1] = vlib_buffer_from_rte_mbuf (mb[1]);
+ b[2] = vlib_buffer_from_rte_mbuf (mb[2]);
+ b[3] = vlib_buffer_from_rte_mbuf (mb[3]);
+ etype[0] = *(u16 *) ((u8 *) mb[0] + next[0] + sizeof (vlib_buffer_t));
+ etype[1] = *(u16 *) ((u8 *) mb[1] + next[1] + sizeof (vlib_buffer_t));
+ etype[2] = *(u16 *) ((u8 *) mb[2] + next[2] + sizeof (vlib_buffer_t));
+ etype[3] = *(u16 *) ((u8 *) mb[3] + next[3] + sizeof (vlib_buffer_t));
+ next[0] = dpdk_rx_next (node, etype[0], flags[0]);
+ next[1] = dpdk_rx_next (node, etype[1], flags[1]);
+ next[2] = dpdk_rx_next (node, etype[2], flags[2]);
+ next[3] = dpdk_rx_next (node, etype[3], flags[3]);
+ adv[0] = device_input_next_node_advance[next[0]];
+ adv[1] = device_input_next_node_advance[next[1]];
+ adv[2] = device_input_next_node_advance[next[2]];
+ adv[3] = device_input_next_node_advance[next[3]];
+ b[0]->current_data += adv[0];
+ b[1]->current_data += adv[1];
+ b[2]->current_data += adv[2];
+ b[3]->current_data += adv[3];
+ b[0]->current_length -= adv[0];
+ b[1]->current_length -= adv[1];
+ b[2]->current_length -= adv[2];
+ b[3]->current_length -= adv[3];
+
+ /* next */
+ next += 4;
+ mb += 4;
+ n_left -= 4;
+ flags += 4;
+ }
- b0->current_data = l3_offset0;
- b0->current_data += mb0->data_off - RTE_PKTMBUF_HEADROOM;
- b0->current_length = mb0->data_len - l3_offset0;
+ while (n_left)
+ {
+ b[0] = vlib_buffer_from_rte_mbuf (mb[0]);
+ next[0] = *(u16 *) ((u8 *) mb[0] + next[0] + sizeof (vlib_buffer_t));
+ next[0] = dpdk_rx_next (node, next[0], flags[0]);
+ adv[0] = device_input_next_node_advance[next[0]];
+ b[0]->current_data += adv[0];
+ b[0]->current_length -= adv[0];
+
+ /* next */
+ next += 1;
+ mb += 1;
+ n_left -= 1;
+ flags += 1;
+ }
+}
- b0->flags = buffer_flags_template;
+static_always_inline void
+dpdk_process_flow_offload (dpdk_device_t * xd, dpdk_per_thread_data_t * ptd,
+ uword n_rx_packets)
+{
+ uword n;
+ dpdk_flow_lookup_entry_t *fle;
+ vlib_buffer_t *b0;
- vnet_buffer (b0)->sw_if_index[VLIB_RX] = xd->vlib_sw_if_index;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
- n_rx_bytes += mb0->pkt_len;
+ /* TODO prefetch and quad-loop */
+ for (n = 0; n < n_rx_packets; n++)
+ {
+ if ((ptd->flags[n] & (1 << DPDK_RX_F_FDIR)) == 0)
+ continue;
- /* Process subsequent segments of multi-segment packets */
- dpdk_process_subseq_segs (vm, b0, mb0, fl);
+ fle = pool_elt_at_index (xd->flow_lookup_entries,
+ ptd->mbufs[n]->hash.fdir.hi);
- /*
- * Turn this on if you run into
- * "bad monkey" contexts, and you want to know exactly
- * which nodes they've visited... See main.c...
- */
- VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
+ if (fle->next_index != (u16) ~ 0)
+ ptd->next[n] = fle->next_index;
- /* Do we have any driver RX features configured on the interface? */
- vnet_feature_start_device_input_x1 (xd->vlib_sw_if_index, &next0,
- b0, l3_offset0);
+ if (fle->flow_id != ~0)
+ {
+ b0 = vlib_buffer_from_rte_mbuf (ptd->mbufs[n]);
+ b0->flow_id = fle->flow_id;
+ }
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- n_buffers--;
- mb_index++;
+ if (fle->buffer_advance != ~0)
+ {
+ b0 = vlib_buffer_from_rte_mbuf (ptd->mbufs[n]);
+ vlib_buffer_advance (b0, fle->buffer_advance);
}
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
+}
+
+static_always_inline u32
+dpdk_device_input (vlib_main_t * vm, dpdk_main_t * dm, dpdk_device_t * xd,
+ vlib_node_runtime_t * node, u32 thread_index, u16 queue_id)
+{
+ uword n_rx_packets = 0, n_rx_bytes;
+ u32 n_left, n_trace;
+ u32 *buffers;
+ u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
+ struct rte_mbuf **mb;
+ vlib_buffer_t *b0;
+ int known_next = 0;
+ u16 *next;
+ u8 or_flags;
+ u32 n;
+
+ dpdk_per_thread_data_t *ptd = vec_elt_at_index (dm->per_thread_data,
+ thread_index);
+ vlib_buffer_t *bt = &ptd->buffer_template;
+
+ if ((xd->flags & DPDK_DEVICE_FLAG_ADMIN_UP) == 0)
+ return 0;
- if (PREDICT_FALSE (vec_len (xd->d_trace_buffers[cpu_index]) > 0))
+ /* get up to DPDK_RX_BURST_SZ buffers from PMD */
+ while (n_rx_packets < DPDK_RX_BURST_SZ)
{
- dpdk_rx_trace (dm, node, xd, queue_id, xd->d_trace_buffers[cpu_index],
- vec_len (xd->d_trace_buffers[cpu_index]));
- vlib_set_trace_count (vm, node, n_trace -
- vec_len (xd->d_trace_buffers[cpu_index]));
+ n = rte_eth_rx_burst (xd->port_id, queue_id,
+ ptd->mbufs + n_rx_packets,
+ DPDK_RX_BURST_SZ - n_rx_packets);
+ n_rx_packets += n;
+
+ if (n < 32)
+ break;
}
- vlib_increment_combined_counter
- (vnet_get_main ()->interface_main.combined_sw_if_counters
- + VNET_INTERFACE_COUNTER_RX,
- cpu_index, xd->vlib_sw_if_index, mb_index, n_rx_bytes);
+ if (n_rx_packets == 0)
+ return 0;
- vnet_device_increment_rx_packets (cpu_index, mb_index);
+ /* Update buffer template */
+ vnet_buffer (bt)->sw_if_index[VLIB_RX] = xd->sw_if_index;
+ bt->error = node->errors[DPDK_ERROR_NONE];
+ /* as DPDK is allocating empty buffers from mempool provided before interface
+ start for each queue, it is safe to store this in the template */
+ bt->buffer_pool_index = xd->buffer_pool_for_queue[queue_id];
- return mb_index;
-}
+ /* receive burst of packets from DPDK PMD */
+ if (PREDICT_FALSE (xd->per_interface_next_index != ~0))
+ {
+ known_next = 1;
+ next_index = xd->per_interface_next_index;
+ }
-static inline void
-poll_rate_limit (dpdk_main_t * dm)
-{
- /* Limit the poll rate by sleeping for N msec between polls */
- if (PREDICT_FALSE (dm->poll_sleep != 0))
+ /* as all packets belong to the same interface feature arc lookup
+ can be don once and result stored in the buffer template */
+ if (PREDICT_FALSE (vnet_device_input_have_features (xd->sw_if_index)))
{
- struct timespec ts, tsrem;
+ vnet_feature_start_device_input_x1 (xd->sw_if_index, &next_index, bt);
+ known_next = 1;
+ }
- ts.tv_sec = 0;
- ts.tv_nsec = 1000 * 1000 * dm->poll_sleep; /* 1ms */
+ if (xd->flags & DPDK_DEVICE_FLAG_MAYBE_MULTISEG)
+ n_rx_bytes = dpdk_process_rx_burst (vm, ptd, n_rx_packets, 1, &or_flags);
+ else
+ n_rx_bytes = dpdk_process_rx_burst (vm, ptd, n_rx_packets, 0, &or_flags);
+
+ if (PREDICT_FALSE (known_next))
+ {
+ for (n = 0; n < n_rx_packets; n++)
+ ptd->next[n] = next_index;
- while (nanosleep (&ts, &tsrem) < 0)
+ vnet_buffer (bt)->feature_arc_index = 0;
+ bt->current_config_index = 0;
+ }
+ else
+ dpdk_set_next_from_etype (vm, node, ptd, n_rx_packets);
+
+ /* flow offload - process if rx flow offload enabled and at least one packet
+ is marked */
+ if (PREDICT_FALSE ((xd->flags & DPDK_DEVICE_FLAG_RX_FLOW_OFFLOAD) &&
+ (or_flags & (1 << DPDK_RX_F_FDIR))))
+ dpdk_process_flow_offload (xd, ptd, n_rx_packets);
+
+ /* is at least one packet marked as ip4 checksum bad? */
+ if (PREDICT_FALSE (or_flags & (1 << DPDK_RX_F_CKSUM_BAD)))
+ for (n = 0; n < n_rx_packets; n++)
+ {
+ if ((ptd->flags[n] & (1 << DPDK_RX_F_CKSUM_BAD)) == 0)
+ continue;
+ if (ptd->next[n] != VNET_DEVICE_INPUT_NEXT_IP4_INPUT)
+ continue;
+
+ b0 = vlib_buffer_from_rte_mbuf (ptd->mbufs[n]);
+ b0->error = node->errors[DPDK_ERROR_IP_CHECKSUM_ERROR];
+ ptd->next[n] = VNET_DEVICE_INPUT_NEXT_DROP;
+ }
+
+ /* enqueue buffers to the next node */
+ vlib_get_buffer_indices_with_offset (vm, (void **) ptd->mbufs, ptd->buffers,
+ n_rx_packets,
+ sizeof (struct rte_mbuf));
+
+ vlib_buffer_enqueue_to_next (vm, node, ptd->buffers, ptd->next,
+ n_rx_packets);
+
+ /* packet trace if enabled */
+ if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
+ {
+ n_left = n_rx_packets;
+ buffers = ptd->buffers;
+ mb = ptd->mbufs;
+ next = ptd->next;
+ while (n_trace && n_left)
{
- ts = tsrem;
+ b0 = vlib_get_buffer (vm, buffers[0]);
+ vlib_trace_buffer (vm, node, next[0], b0, /* follow_chain */ 0);
+
+ dpdk_rx_trace_t *t0 = vlib_add_trace (vm, node, b0, sizeof t0[0]);
+ t0->queue_index = queue_id;
+ t0->device_index = xd->device_index;
+ t0->buffer_index = vlib_get_buffer_index (vm, b0);
+
+ clib_memcpy (&t0->mb, mb[0], sizeof t0->mb);
+ clib_memcpy (&t0->buffer, b0, sizeof b0[0] - sizeof b0->pre_data);
+ clib_memcpy (t0->buffer.pre_data, b0->data,
+ sizeof t0->buffer.pre_data);
+ clib_memcpy (&t0->data, mb[0]->buf_addr + mb[0]->data_off,
+ sizeof t0->data);
+ n_trace--;
+ n_left--;
+ buffers++;
+ mb++;
+ next++;
}
+ vlib_set_trace_count (vm, node, n_trace);
}
-}
-/** \brief Main DPDK input node
- @node dpdk-input
-
- This is the main DPDK input node: across each assigned interface,
- call rte_eth_rx_burst(...) or similar to obtain a vector of
- packets to process. Handle early packet discard. Derive @c
- vlib_buffer_t metadata from <code>struct rte_mbuf</code> metadata,
- Depending on the resulting metadata: adjust <code>b->current_data,
- b->current_length </code> and dispatch directly to
- ip4-input-no-checksum, or ip6-input. Trace the packet if required.
-
- @param vm vlib_main_t corresponding to the current thread
- @param node vlib_node_runtime_t
- @param f vlib_frame_t input-node, not used.
+ /* rx pcap capture if enabled */
+ if (PREDICT_FALSE (dm->pcap[VLIB_RX].pcap_enable))
+ {
+ u32 bi0;
+ n_left = n_rx_packets;
+ buffers = ptd->buffers;
+ while (n_left)
+ {
+ bi0 = buffers[0];
+ b0 = vlib_get_buffer (vm, bi0);
+ buffers++;
- @par Graph mechanics: buffer metadata, next index usage
+ if (dm->pcap[VLIB_RX].pcap_sw_if_index == 0 ||
+ dm->pcap[VLIB_RX].pcap_sw_if_index
+ == vnet_buffer (b0)->sw_if_index[VLIB_RX])
+ {
+ struct rte_mbuf *mb;
+ i16 data_start;
+ i32 temp_advance;
+
+ /*
+ * Note: current_data will have advanced
+ * when we skip ethernet input.
+ * Temporarily back up to the original DMA
+ * target, so we capture a valid ethernet frame
+ */
+ mb = rte_mbuf_from_vlib_buffer (b0);
+
+ /* Figure out the original data_start */
+ data_start = (mb->buf_addr + mb->data_off) - (void *) b0->data;
+ /* Back up that far */
+ temp_advance = b0->current_data - data_start;
+ vlib_buffer_advance (b0, -temp_advance);
+ /* Trace the packet */
+ pcap_add_buffer (&dm->pcap[VLIB_RX].pcap_main, vm, bi0, 512);
+ /* and advance again */
+ vlib_buffer_advance (b0, temp_advance);
+ }
+ n_left--;
+ }
+ }
- @em Uses:
- - <code>struct rte_mbuf mb->ol_flags</code>
- - PKT_RX_IP_CKSUM_BAD
- - <code> RTE_ETH_IS_xxx_HDR(mb->packet_type) </code>
- - packet classification result
+ vlib_increment_combined_counter
+ (vnet_get_main ()->interface_main.combined_sw_if_counters
+ + VNET_INTERFACE_COUNTER_RX, thread_index, xd->sw_if_index,
+ n_rx_packets, n_rx_bytes);
- @em Sets:
- - <code>b->error</code> if the packet is to be dropped immediately
- - <code>b->current_data, b->current_length</code>
- - adjusted as needed to skip the L2 header in direct-dispatch cases
- - <code>vnet_buffer(b)->sw_if_index[VLIB_RX]</code>
- - rx interface sw_if_index
- - <code>vnet_buffer(b)->sw_if_index[VLIB_TX] = ~0</code>
- - required by ipX-lookup
- - <code>b->flags</code>
- - to indicate multi-segment pkts (VLIB_BUFFER_NEXT_PRESENT), etc.
+ vnet_device_increment_rx_packets (thread_index, n_rx_packets);
- <em>Next Nodes:</em>
- - Static arcs to: error-drop, ethernet-input,
- ip4-input-no-checksum, ip6-input, mpls-input
- - per-interface redirection, controlled by
- <code>xd->per_interface_next_index</code>
-*/
+ return n_rx_packets;
+}
-static uword
-dpdk_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * f)
+VLIB_NODE_FN (dpdk_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * f)
{
dpdk_main_t *dm = &dpdk_main;
dpdk_device_t *xd;
uword n_rx_packets = 0;
- dpdk_device_and_queue_t *dq;
- u32 cpu_index = os_get_cpu_number ();
+ vnet_device_input_runtime_t *rt = (void *) node->runtime_data;
+ vnet_device_and_queue_t *dq;
+ u32 thread_index = node->thread_index;
/*
* Poll all devices on this cpu for input/interrupts.
*/
/* *INDENT-OFF* */
- vec_foreach (dq, dm->devices_by_cpu[cpu_index])
+ foreach_device_and_queue (dq, rt->devices_and_queues)
{
- xd = vec_elt_at_index(dm->devices, dq->device);
- n_rx_packets += dpdk_device_input (dm, xd, node, cpu_index, dq->queue_id);
+ xd = vec_elt_at_index(dm->devices, dq->dev_instance);
+ if (PREDICT_FALSE (xd->flags & DPDK_DEVICE_FLAG_BOND_SLAVE))
+ continue; /* Do not poll slave to a bonded interface */
+ n_rx_packets += dpdk_device_input (vm, dm, xd, node, thread_index,
+ dq->queue_id);
}
/* *INDENT-ON* */
-
- poll_rate_limit (dm);
-
return n_rx_packets;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (dpdk_input_node) = {
- .function = dpdk_input,
.type = VLIB_NODE_TYPE_INPUT,
.name = "dpdk-input",
.sibling_of = "device-input",
.state = VLIB_NODE_STATE_DISABLED,
.format_buffer = format_ethernet_header_with_length,
- .format_trace = format_dpdk_rx_dma_trace,
+ .format_trace = format_dpdk_rx_trace,
.n_errors = DPDK_N_ERROR,
.error_strings = dpdk_error_strings,
};
-
-VLIB_NODE_FUNCTION_MULTIARCH (dpdk_input_node, dpdk_input);
/* *INDENT-ON* */
/*
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