X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fdpdk%2Fdevice%2Fnode.c;h=b4600324551e2b946ba0d76dc5added7c58db340;hb=c0a08cadee9161554246f707eaf24f782086914d;hp=fa0fa904e7c2e7f25a72f50af4169af9a66b0ae2;hpb=2d6f66e1748be190664cbd72c826db32616d759a;p=vpp.git diff --git a/src/plugins/dpdk/device/node.c b/src/plugins/dpdk/device/node.c index fa0fa904e7c..b4600324551 100644 --- a/src/plugins/dpdk/device/node.c +++ b/src/plugins/dpdk/device/node.c @@ -19,108 +19,34 @@ #include #include +#include #include #include #include -#include #include +#include #include +#include #include -#ifndef CLIB_MULTIARCH_VARIANT static char *dpdk_error_strings[] = { #define _(n,s) s, foreach_dpdk_error #undef _ }; -#endif -always_inline u32 -dpdk_rx_next_from_etype (struct rte_mbuf *mb) -{ - ethernet_header_t *h = rte_pktmbuf_mtod (mb, ethernet_header_t *); - if (PREDICT_TRUE (h->type == clib_host_to_net_u16 (ETHERNET_TYPE_IP4))) - { - 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 (h->type == clib_host_to_net_u16 (ETHERNET_TYPE_IP6))) - return VNET_DEVICE_INPUT_NEXT_IP6_INPUT; - else - if (PREDICT_TRUE (h->type == 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 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; -} - -static_always_inline void -dpdk_add_trace (vlib_main_t * vm, - vlib_node_runtime_t * node, - dpdk_device_t * xd, - u16 queue_id, vlib_buffer_t * b, struct rte_mbuf *mb) -{ - dpdk_rx_dma_trace_t *t0 = vlib_add_trace (vm, node, b, sizeof t0[0]); - t0->queue_index = queue_id; - t0->device_index = xd->device_index; - t0->buffer_index = vlib_get_buffer_index (vm, b); - - clib_memcpy (&t0->mb, mb, sizeof t0->mb); - clib_memcpy (&t0->buffer, b, sizeof b[0] - sizeof b->pre_data); - clib_memcpy (t0->buffer.pre_data, b->data, sizeof t0->buffer.pre_data); - clib_memcpy (&t0->data, mb->buf_addr + mb->data_off, sizeof t0->data); -} - -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); - } +/* make sure all flags we need are stored in lower 32 bits */ +STATIC_ASSERT ((u64) (RTE_MBUF_F_RX_IP_CKSUM_BAD | RTE_MBUF_F_RX_L4_CKSUM_BAD | + RTE_MBUF_F_RX_FDIR | RTE_MBUF_F_RX_LRO) < (1ULL << 32), + "dpdk flags not in lower word, fix needed"); - return n_buffers; -} +STATIC_ASSERT (RTE_MBUF_F_RX_L4_CKSUM_BAD == (1ULL << 3), + "bit number of RTE_MBUF_F_RX_L4_CKSUM_BAD is no longer 3!"); -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_t * bt) { u8 nb_seg = 1; struct rte_mbuf *mb_seg = 0; @@ -129,7 +55,7 @@ dpdk_process_subseq_segs (vlib_main_t * vm, vlib_buffer_t * b, b_chain = b; if (mb->nb_segs < 2) - return; + return 0; b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID; b->total_length_not_including_first_buffer = 0; @@ -139,10 +65,7 @@ dpdk_process_subseq_segs (vlib_main_t * vm, vlib_buffer_t * b, ASSERT (mb_seg != 0); b_seg = vlib_buffer_from_rte_mbuf (mb_seg); - vlib_buffer_init_for_free_list (b_seg, fl); - - ASSERT ((b_seg->flags & VLIB_BUFFER_NEXT_PRESENT) == 0); - ASSERT (b_seg->current_data == 0); + vlib_buffer_copy_template (b_seg, bt); /* * The driver (e.g. virtio) may not put the packet data at the start @@ -161,479 +84,500 @@ dpdk_process_subseq_segs (vlib_main_t * vm, vlib_buffer_t * b, 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_load (mb[0]); + clib_prefetch_load (mb[1]); + clib_prefetch_load (mb[2]); + clib_prefetch_load (mb[3]); } static_always_inline void -dpdk_prefetch_ethertype (struct rte_mbuf *mb) +dpdk_prefetch_buffer_x4 (struct rte_mbuf *mb[]) { - CLIB_PREFETCH (mb->buf_addr + mb->data_off + - STRUCT_OFFSET_OF (ethernet_header_t, type), - CLIB_CACHE_LINE_BYTES, LOAD); + vlib_buffer_t *b; + b = vlib_buffer_from_rte_mbuf (mb[0]); + clib_prefetch_store (b); + b = vlib_buffer_from_rte_mbuf (mb[1]); + clib_prefetch_store (b); + b = vlib_buffer_from_rte_mbuf (mb[2]); + clib_prefetch_store (b); + b = vlib_buffer_from_rte_mbuf (mb[3]); + clib_prefetch_store (b); } -/* - * 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 thread_index, u16 queue_id, - int maybe_multiseg, u32 n_trace) -{ - 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; - vlib_buffer_free_list_t *fl; - vlib_buffer_t *bt = vec_elt_at_index (dm->buffer_templates, thread_index); +/** \brief Main DPDK input node + @node dpdk-input - if ((xd->flags & DPDK_DEVICE_FLAG_ADMIN_UP) == 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 + struct rte_mbuf metadata, + Depending on the resulting metadata: adjust b->current_data, + b->current_length and dispatch directly to + ip4-input-no-checksum, or ip6-input. Trace the packet if required. - n_buffers = dpdk_rx_burst (dm, xd, queue_id); + @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. - if (n_buffers == 0) - { - return 0; - } + @par Graph mechanics: buffer metadata, next index usage - fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX); + @em Uses: + - struct rte_mbuf mb->ol_flags + - RTE_MBUF_F_RX_IP_CKSUM_BAD - /* Update buffer template */ - vnet_buffer (bt)->sw_if_index[VLIB_RX] = xd->vlib_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]; + @em Sets: + - b->error if the packet is to be dropped immediately + - b->current_data, b->current_length + - adjusted as needed to skip the L2 header in direct-dispatch cases + - vnet_buffer(b)->sw_if_index[VLIB_RX] + - rx interface sw_if_index + - vnet_buffer(b)->sw_if_index[VLIB_TX] = ~0 + - required by ipX-lookup + - b->flags + - to indicate multi-segment pkts (VLIB_BUFFER_NEXT_PRESENT), etc. - mb_index = 0; + Next Nodes: + - Static arcs to: error-drop, ethernet-input, + ip4-input-no-checksum, ip6-input, mpls-input + - per-interface redirection, controlled by + xd->per_interface_next_index +*/ - while (n_buffers > 0) +static_always_inline u32 +dpdk_ol_flags_extract (struct rte_mbuf **mb, u32 *flags, int count) +{ + u32 rv = 0; + int i; + for (i = 0; i < count; i++) { - vlib_buffer_t *b0, *b1, *b2, *b3; - u32 bi0, next0; - u32 bi1, next1; - u32 bi2, next2; - u32 bi3, next3; - u8 error0, error1, error2, error3; - i16 offset0, offset1, offset2, offset3; - u64 or_ol_flags; - - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_buffers >= 12 && n_left_to_next >= 4) - { - struct rte_mbuf *mb0, *mb1, *mb2, *mb3; + /* all flags we are interested in are in lower 8 bits but + that might change */ + flags[i] = (u32) mb[i]->ol_flags; + rv |= flags[i]; + } + return rv; +} - /* prefetches are interleaved with the rest of the code to reduce - pressure on L1 cache */ - dpdk_prefetch_buffer (xd->rx_vectors[queue_id][mb_index + 8]); - dpdk_prefetch_ethertype (xd->rx_vectors[queue_id][mb_index + 4]); +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, u32 *or_flagsp) +{ + u32 n_left = n_rx_packets; + vlib_buffer_t *b[4]; + struct rte_mbuf **mb = ptd->mbufs; + uword n_bytes = 0; + u32 *flags, or_flags = 0; + vlib_buffer_t bt; + + mb = ptd->mbufs; + flags = ptd->flags; + + /* copy template into local variable - will save per packet load */ + vlib_buffer_copy_template (&bt, &ptd->buffer_template); + while (n_left >= 8) + { + dpdk_prefetch_buffer_x4 (mb + 4); - mb0 = xd->rx_vectors[queue_id][mb_index]; - mb1 = xd->rx_vectors[queue_id][mb_index + 1]; - mb2 = xd->rx_vectors[queue_id][mb_index + 2]; - 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]); - ASSERT (mb0); - ASSERT (mb1); - ASSERT (mb2); - ASSERT (mb3); + vlib_buffer_copy_template (b[0], &bt); + vlib_buffer_copy_template (b[1], &bt); + vlib_buffer_copy_template (b[2], &bt); + vlib_buffer_copy_template (b[3], &bt); - if (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); - 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); + or_flags |= dpdk_ol_flags_extract (mb, flags, 4); + flags += 4; - dpdk_prefetch_buffer (xd->rx_vectors[queue_id][mb_index + 9]); - dpdk_prefetch_ethertype (xd->rx_vectors[queue_id][mb_index + 5]); + b[0]->current_data = mb[0]->data_off - RTE_PKTMBUF_HEADROOM; + n_bytes += b[0]->current_length = mb[0]->data_len; - clib_memcpy64_x4 (b0, b1, b2, b3, bt); + b[1]->current_data = mb[1]->data_off - RTE_PKTMBUF_HEADROOM; + n_bytes += b[1]->current_length = mb[1]->data_len; - dpdk_prefetch_buffer (xd->rx_vectors[queue_id][mb_index + 10]); - dpdk_prefetch_ethertype (xd->rx_vectors[queue_id][mb_index + 6]); + b[2]->current_data = mb[2]->data_off - RTE_PKTMBUF_HEADROOM; + n_bytes += b[2]->current_length = mb[2]->data_len; - 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); + b[3]->current_data = mb[3]->data_off - RTE_PKTMBUF_HEADROOM; + n_bytes += b[3]->current_length = mb[3]->data_len; - 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 (maybe_multiseg) + { + n_bytes += dpdk_process_subseq_segs (vm, b[0], mb[0], &bt); + n_bytes += dpdk_process_subseq_segs (vm, b[1], mb[1], &bt); + n_bytes += dpdk_process_subseq_segs (vm, b[2], mb[2], &bt); + n_bytes += dpdk_process_subseq_segs (vm, b[3], mb[3], &bt); + } - if (PREDICT_FALSE (xd->per_interface_next_index != ~0)) - { - next0 = next1 = next2 = next3 = xd->per_interface_next_index; - } - else - { - next0 = dpdk_rx_next_from_etype (mb0); - next1 = dpdk_rx_next_from_etype (mb1); - next2 = dpdk_rx_next_from_etype (mb2); - next3 = dpdk_rx_next_from_etype (mb3); - } + /* next */ + mb += 4; + n_left -= 4; + } - dpdk_prefetch_buffer (xd->rx_vectors[queue_id][mb_index + 11]); - dpdk_prefetch_ethertype (xd->rx_vectors[queue_id][mb_index + 7]); + while (n_left) + { + b[0] = vlib_buffer_from_rte_mbuf (mb[0]); + vlib_buffer_copy_template (b[0], &bt); + or_flags |= dpdk_ol_flags_extract (mb, flags, 1); + flags += 1; - or_ol_flags = (mb0->ol_flags | mb1->ol_flags | - mb2->ol_flags | mb3->ol_flags); - 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]; - } + b[0]->current_data = mb[0]->data_off - RTE_PKTMBUF_HEADROOM; + n_bytes += b[0]->current_length = mb[0]->data_len; - offset0 = device_input_next_node_advance[next0]; - b0->current_data = mb0->data_off + offset0 - RTE_PKTMBUF_HEADROOM; - b0->flags |= device_input_next_node_flags[next0]; - vnet_buffer (b0)->l3_hdr_offset = b0->current_data; - vnet_buffer (b0)->l2_hdr_offset = - mb0->data_off - RTE_PKTMBUF_HEADROOM; - b0->current_length = mb0->data_len - offset0; - n_rx_bytes += mb0->pkt_len; - - offset1 = device_input_next_node_advance[next1]; - b1->current_data = mb1->data_off + offset1 - RTE_PKTMBUF_HEADROOM; - b1->flags |= device_input_next_node_flags[next1]; - vnet_buffer (b1)->l3_hdr_offset = b1->current_data; - vnet_buffer (b1)->l2_hdr_offset = - mb1->data_off - RTE_PKTMBUF_HEADROOM; - b1->current_length = mb1->data_len - offset1; - n_rx_bytes += mb1->pkt_len; - - offset2 = device_input_next_node_advance[next2]; - b2->current_data = mb2->data_off + offset2 - RTE_PKTMBUF_HEADROOM; - b2->flags |= device_input_next_node_flags[next2]; - vnet_buffer (b2)->l3_hdr_offset = b2->current_data; - vnet_buffer (b2)->l2_hdr_offset = - mb2->data_off - RTE_PKTMBUF_HEADROOM; - b2->current_length = mb2->data_len - offset2; - n_rx_bytes += mb2->pkt_len; - - offset3 = device_input_next_node_advance[next3]; - b3->current_data = mb3->data_off + offset3 - RTE_PKTMBUF_HEADROOM; - b3->flags |= device_input_next_node_flags[next3]; - vnet_buffer (b3)->l3_hdr_offset = b3->current_data; - vnet_buffer (b3)->l2_hdr_offset = - mb3->data_off - RTE_PKTMBUF_HEADROOM; - b3->current_length = mb3->data_len - offset3; - n_rx_bytes += mb3->pkt_len; - - - /* Process subsequent segments of multi-segment packets */ - if (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); - } + if (maybe_multiseg) + n_bytes += dpdk_process_subseq_segs (vm, b[0], mb[0], &bt); - /* - * 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); + /* next */ + mb += 1; + n_left -= 1; + } - /* 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); + *or_flagsp = or_flags; + return n_bytes; +} - switch (n_trace) - { - default: - vlib_trace_buffer (vm, node, next3, b3, /* follow_chain */ 0); - dpdk_add_trace (vm, node, xd, queue_id, b3, mb3); - n_trace--; - case 3: - vlib_trace_buffer (vm, node, next2, b2, /* follow_chain */ 0); - dpdk_add_trace (vm, node, xd, queue_id, b2, mb2); - n_trace--; - case 2: - vlib_trace_buffer (vm, node, next1, b1, /* follow_chain */ 0); - dpdk_add_trace (vm, node, xd, queue_id, b1, mb1); - n_trace--; - case 1: - vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 0); - dpdk_add_trace (vm, node, xd, queue_id, b0, mb0); - n_trace--; - case 0: - break; - } +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; - 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; + /* TODO prefetch and quad-loop */ + for (n = 0; n < n_rx_packets; n++) + { + if ((ptd->flags[n] & RTE_MBUF_F_RX_FDIR_ID) == 0) + continue; + + fle = pool_elt_at_index (xd->flow_lookup_entries, + ptd->mbufs[n]->hash.fdir.hi); + + if (fle->next_index != (u16) ~ 0) + ptd->next[n] = fle->next_index; + + if (fle->flow_id != ~0) + { + b0 = vlib_buffer_from_rte_mbuf (ptd->mbufs[n]); + b0->flow_id = fle->flow_id; } - while (n_buffers > 0 && n_left_to_next > 0) + + if (fle->buffer_advance != ~0) { - struct rte_mbuf *mb0 = xd->rx_vectors[queue_id][mb_index]; + b0 = vlib_buffer_from_rte_mbuf (ptd->mbufs[n]); + vlib_buffer_advance (b0, fle->buffer_advance); + } + } +} - if (PREDICT_TRUE (n_buffers > 3)) - { - dpdk_prefetch_buffer (xd->rx_vectors[queue_id][mb_index + 2]); - dpdk_prefetch_ethertype (xd->rx_vectors[queue_id] - [mb_index + 1]); - } +static_always_inline u16 +dpdk_lro_find_l4_hdr_sz (vlib_buffer_t *b) +{ + u16 l4_hdr_sz = 0; + u16 current_offset = 0; + ethernet_header_t *e; + tcp_header_t *tcp; + u8 *data = vlib_buffer_get_current (b); + u16 ethertype; + e = (void *) data; + current_offset += sizeof (e[0]); + ethertype = clib_net_to_host_u16 (e->type); + if (ethernet_frame_is_tagged (ethertype)) + { + ethernet_vlan_header_t *vlan = (ethernet_vlan_header_t *) (e + 1); + ethertype = clib_net_to_host_u16 (vlan->type); + current_offset += sizeof (*vlan); + if (ethertype == ETHERNET_TYPE_VLAN) + { + vlan++; + current_offset += sizeof (*vlan); + ethertype = clib_net_to_host_u16 (vlan->type); + } + } + data += current_offset; + if (ethertype == ETHERNET_TYPE_IP4) + { + data += sizeof (ip4_header_t); + tcp = (void *) data; + l4_hdr_sz = tcp_header_bytes (tcp); + } + else + { + /* FIXME: extension headers...*/ + data += sizeof (ip6_header_t); + tcp = (void *) data; + l4_hdr_sz = tcp_header_bytes (tcp); + } + return l4_hdr_sz; +} - ASSERT (mb0); +static_always_inline void +dpdk_process_lro_offload (dpdk_device_t *xd, dpdk_per_thread_data_t *ptd, + uword n_rx_packets) +{ + uword n; + vlib_buffer_t *b0; + for (n = 0; n < n_rx_packets; n++) + { + b0 = vlib_buffer_from_rte_mbuf (ptd->mbufs[n]); + if (ptd->flags[n] & RTE_MBUF_F_RX_LRO) + { + b0->flags |= VNET_BUFFER_F_GSO; + vnet_buffer2 (b0)->gso_size = ptd->mbufs[n]->tso_segsz; + vnet_buffer2 (b0)->gso_l4_hdr_sz = dpdk_lro_find_l4_hdr_sz (b0); + } + } +} - b0 = vlib_buffer_from_rte_mbuf (mb0); +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; + dpdk_rx_queue_t *rxq = vec_elt_at_index (xd->rx_queues, queue_id); + u32 n_left, n_trace; + u32 *buffers; + u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT; + struct rte_mbuf **mb; + vlib_buffer_t *b0; + u16 *next; + u32 or_flags; + u32 n; + int single_next = 0; - /* Prefetch one next segment if it exists. */ - if (PREDICT_FALSE (mb0->nb_segs > 1)) - dpdk_prefetch_buffer (mb0->next); + dpdk_per_thread_data_t *ptd = vec_elt_at_index (dm->per_thread_data, + thread_index); + vlib_buffer_t *bt = &ptd->buffer_template; - clib_memcpy (b0, bt, CLIB_CACHE_LINE_BYTES); + if ((xd->flags & DPDK_DEVICE_FLAG_ADMIN_UP) == 0) + return 0; - bi0 = vlib_get_buffer_index (vm, b0); + /* get up to DPDK_RX_BURST_SZ buffers from PMD */ + while (n_rx_packets < DPDK_RX_BURST_SZ) + { + u32 n_to_rx = clib_min (DPDK_RX_BURST_SZ - n_rx_packets, 32); - to_next[0] = bi0; - to_next++; - n_left_to_next--; + n = rte_eth_rx_burst (xd->port_id, queue_id, ptd->mbufs + n_rx_packets, + n_to_rx); + n_rx_packets += n; - if (PREDICT_FALSE (xd->per_interface_next_index != ~0)) - next0 = xd->per_interface_next_index; - else - next0 = dpdk_rx_next_from_etype (mb0); + if (n < n_to_rx) + break; + } - dpdk_rx_error_from_mb (mb0, &next0, &error0); - b0->error = node->errors[error0]; + if (n_rx_packets == 0) + return 0; - offset0 = device_input_next_node_advance[next0]; - b0->current_data = mb0->data_off + offset0 - RTE_PKTMBUF_HEADROOM; - b0->flags |= device_input_next_node_flags[next0]; - vnet_buffer (b0)->l3_hdr_offset = b0->current_data; - vnet_buffer (b0)->l2_hdr_offset = - mb0->data_off - RTE_PKTMBUF_HEADROOM; - b0->current_length = mb0->data_len - offset0; - n_rx_bytes += mb0->pkt_len; + /* Update buffer template */ + vnet_buffer (bt)->sw_if_index[VLIB_RX] = xd->sw_if_index; + bt->error = node->errors[DPDK_ERROR_NONE]; + bt->flags = xd->buffer_flags; + /* 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 = rxq->buffer_pool_index; + bt->ref_count = 1; + vnet_buffer (bt)->feature_arc_index = 0; + bt->current_config_index = 0; - /* Process subsequent segments of multi-segment packets */ - dpdk_process_subseq_segs (vm, b0, mb0, fl); + /* receive burst of packets from DPDK PMD */ + if (PREDICT_FALSE (xd->per_interface_next_index != ~0)) + next_index = xd->per_interface_next_index; - /* - * 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); + /* 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))) + vnet_feature_start_device_input_x1 (xd->sw_if_index, &next_index, bt); - /* Do we have any driver RX features configured on the interface? */ - vnet_feature_start_device_input_x1 (xd->vlib_sw_if_index, &next0, - b0); + 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 (n_trace != 0) - { - vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 0); - dpdk_add_trace (vm, node, xd, queue_id, b0, mb0); - n_trace--; - } + if (PREDICT_FALSE ((or_flags & RTE_MBUF_F_RX_LRO))) + dpdk_process_lro_offload (xd, ptd, n_rx_packets); - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, - to_next, n_left_to_next, - bi0, next0); - n_buffers--; - mb_index++; + if (PREDICT_FALSE ((or_flags & RTE_MBUF_F_RX_L4_CKSUM_BAD) && + (xd->buffer_flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT))) + { + for (n = 0; n < n_rx_packets; n++) + { + /* Check and reset VNET_BUFFER_F_L4_CHECKSUM_CORRECT flag + if RTE_MBUF_F_RX_L4_CKSUM_BAD is set. + The magic num 3 is the bit number of RTE_MBUF_F_RX_L4_CKSUM_BAD + which is defined in DPDK. + Have made a STATIC_ASSERT in this file to ensure this. + */ + b0 = vlib_buffer_from_rte_mbuf (ptd->mbufs[n]); + b0->flags ^= (ptd->flags[n] & RTE_MBUF_F_RX_L4_CKSUM_BAD) + << (VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT - 3); } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); } - vlib_increment_combined_counter - (vnet_get_main ()->interface_main.combined_sw_if_counters - + VNET_INTERFACE_COUNTER_RX, - thread_index, xd->vlib_sw_if_index, mb_index, n_rx_bytes); - - vnet_device_increment_rx_packets (thread_index, mb_index); - - return mb_index; -} - -static_always_inline u32 -dpdk_device_input_mseg (dpdk_main_t * dm, dpdk_device_t * xd, - vlib_node_runtime_t * node, u32 thread_index, - u16 queue_id, u32 n_trace) -{ - if (xd->flags & DPDK_DEVICE_FLAG_MAYBE_MULTISEG) - return dpdk_device_input (dm, xd, node, thread_index, queue_id, - /* maybe_multiseg */ 1, n_trace); + if (PREDICT_FALSE (or_flags & RTE_MBUF_F_RX_FDIR)) + { + /* some packets will need to go to different next nodes */ + for (n = 0; n < n_rx_packets; n++) + ptd->next[n] = next_index; + + /* 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 & RTE_MBUF_F_RX_FDIR))) + dpdk_process_flow_offload (xd, ptd, n_rx_packets); + + /* 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); + } else - return dpdk_device_input (dm, xd, node, thread_index, queue_id, - /* maybe_multiseg */ 0, n_trace); -} - -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_usec != 0)) { - struct timespec ts, tsrem; + u32 *to_next, n_left_to_next; - ts.tv_sec = 0; - ts.tv_nsec = 1000 * dm->poll_sleep_usec; + vlib_get_new_next_frame (vm, node, next_index, to_next, n_left_to_next); + vlib_get_buffer_indices_with_offset (vm, (void **) ptd->mbufs, to_next, + n_rx_packets, + sizeof (struct rte_mbuf)); - while (nanosleep (&ts, &tsrem) < 0) + if (PREDICT_TRUE (next_index == VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT)) { - ts = tsrem; + vlib_next_frame_t *nf; + vlib_frame_t *f; + ethernet_input_frame_t *ef; + nf = vlib_node_runtime_get_next_frame (vm, node, next_index); + f = vlib_get_frame (vm, nf->frame); + f->flags = ETH_INPUT_FRAME_F_SINGLE_SW_IF_IDX; + + ef = vlib_frame_scalar_args (f); + ef->sw_if_index = xd->sw_if_index; + ef->hw_if_index = xd->hw_if_index; + + /* if PMD supports ip4 checksum check and there are no packets + marked as ip4 checksum bad we can notify ethernet input so it + can send pacets to ip4-input-no-checksum node */ + if (xd->flags & DPDK_DEVICE_FLAG_RX_IP4_CKSUM && + (or_flags & RTE_MBUF_F_RX_IP_CKSUM_BAD) == 0) + f->flags |= ETH_INPUT_FRAME_F_IP4_CKSUM_OK; + vlib_frame_no_append (f); } + n_left_to_next -= n_rx_packets; + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + single_next = 1; } -} -/** \brief Main DPDK input node - @node dpdk-input + /* packet trace if enabled */ + if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)))) + { + if (single_next) + vlib_get_buffer_indices_with_offset (vm, (void **) ptd->mbufs, + ptd->buffers, n_rx_packets, + sizeof (struct rte_mbuf)); - 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 struct rte_mbuf metadata, - Depending on the resulting metadata: adjust b->current_data, - b->current_length and dispatch directly to - ip4-input-no-checksum, or ip6-input. Trace the packet if required. + n_left = n_rx_packets; + buffers = ptd->buffers; + mb = ptd->mbufs; + next = ptd->next; - @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. + while (n_trace && n_left) + { + b0 = vlib_get_buffer (vm, buffers[0]); + if (single_next == 0) + next_index = next[0]; - @par Graph mechanics: buffer metadata, next index usage + if (PREDICT_TRUE + (vlib_trace_buffer + (vm, node, next_index, b0, /* follow_chain */ 0))) + { - @em Uses: - - struct rte_mbuf mb->ol_flags - - PKT_RX_IP_CKSUM_BAD - - RTE_ETH_IS_xxx_HDR(mb->packet_type) - - packet classification result + 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_fast (&t0->mb, mb[0], sizeof t0->mb); + clib_memcpy_fast (&t0->buffer, b0, + sizeof b0[0] - sizeof b0->pre_data); + clib_memcpy_fast (t0->buffer.pre_data, b0->data, + sizeof t0->buffer.pre_data); + clib_memcpy_fast (&t0->data, mb[0]->buf_addr + mb[0]->data_off, + sizeof t0->data); + n_trace--; + } - @em Sets: - - b->error if the packet is to be dropped immediately - - b->current_data, b->current_length - - adjusted as needed to skip the L2 header in direct-dispatch cases - - vnet_buffer(b)->sw_if_index[VLIB_RX] - - rx interface sw_if_index - - vnet_buffer(b)->sw_if_index[VLIB_TX] = ~0 - - required by ipX-lookup - - b->flags - - to indicate multi-segment pkts (VLIB_BUFFER_NEXT_PRESENT), etc. + n_left--; + buffers++; + mb++; + next++; + } + vlib_set_trace_count (vm, node, n_trace); + } - Next Nodes: - - Static arcs to: error-drop, ethernet-input, - ip4-input-no-checksum, ip6-input, mpls-input - - per-interface redirection, controlled by - xd->per_interface_next_index -*/ + 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); + + vnet_device_increment_rx_packets (thread_index, n_rx_packets); -uword -CLIB_MULTIARCH_FN (dpdk_input) (vlib_main_t * vm, vlib_node_runtime_t * node, + return n_rx_packets; +} + +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; - vnet_device_input_runtime_t *rt = (void *) node->runtime_data; - vnet_device_and_queue_t *dq; - u32 thread_index = node->thread_index; + vnet_hw_if_rxq_poll_vector_t *pv; + u32 thread_index = vm->thread_index; /* * Poll all devices on this cpu for input/interrupts. */ - /* *INDENT-OFF* */ - foreach_device_and_queue (dq, rt->devices_and_queues) - { - 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 */ - u32 n_trace = vlib_get_trace_count (vm, node); - if (PREDICT_TRUE(n_trace == 0)) - n_rx_packets += dpdk_device_input_mseg (dm, xd, node, thread_index, dq->queue_id, 0); - else - { - u32 n_tr_packets = dpdk_device_input_mseg (dm, xd, node, thread_index, - dq->queue_id, n_trace); - n_rx_packets += n_tr_packets; - vlib_set_trace_count (vm, node, n_trace - clib_min(n_trace, n_tr_packets)); - } - } - /* *INDENT-ON* */ - poll_rate_limit (dm); + pv = vnet_hw_if_get_rxq_poll_vector (vm, node); + for (int i = 0; i < vec_len (pv); i++) + { + xd = vec_elt_at_index (dm->devices, pv[i].dev_instance); + n_rx_packets += + dpdk_device_input (vm, dm, xd, node, thread_index, pv[i].queue_id); + } return n_rx_packets; } -#ifndef CLIB_MULTIARCH_VARIANT /* *INDENT-OFF* */ VLIB_REGISTER_NODE (dpdk_input_node) = { - .function = dpdk_input, .type = VLIB_NODE_TYPE_INPUT, .name = "dpdk-input", .sibling_of = "device-input", + .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED, /* Will be enabled if/when hardware is detected. */ .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, }; /* *INDENT-ON* */ -vlib_node_function_t __clib_weak dpdk_input_avx512; -vlib_node_function_t __clib_weak dpdk_input_avx2; - -#if __x86_64__ -static void __clib_constructor -dpdk_input_multiarch_select (void) -{ - if (dpdk_input_avx512 && clib_cpu_supports_avx512f ()) - dpdk_input_node.function = dpdk_input_avx512; - else if (dpdk_input_avx2 && clib_cpu_supports_avx2 ()) - dpdk_input_node.function = dpdk_input_avx2; -} -#endif -#endif - /* * fd.io coding-style-patch-verification: ON *