Python-API: Python 2 support. - vpp - Vector Packet Processing

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author	Ole Troan <ot@cisco.com>	2016-04-25 13:11:19 +0200
committer	Ole Troan <ot@cisco.com>	2016-04-25 13:11:19 +0200
commit	d06b9f9cbf9402d66d26fc638a12b84ade197848 (patch)
tree	762ce885ea188cff1cd94bd53806bee5b59eb3db /vpp-api/python/pneum
parent	fc6cf287c46e075dcdfcd8bf1df0a7bde78a9c18 (diff)

Python-API: Python 2 support.

Change-Id: I6bc656caf22e284233e27f9e003f11502f306c11 Signed-off-by: Ole Troan <ot@cisco.com>

Diffstat (limited to 'vpp-api/python/pneum')

-rwxr-xr-x

vpp-api/python/pneum/api-gen.py

1 files changed, 1 insertions, 1 deletions

/* * Copyright (c) 2015 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <vnet/vnet.h> #include <vppinfra/vec.h> #include <vppinfra/error.h> #include <vppinfra/format.h> #include <vppinfra/xxhash.h> #include <vnet/ethernet/ethernet.h> #include <dpdk/buffer.h> #include <dpdk/device/dpdk.h> #include <vnet/classify/vnet_classify.h> #include <vnet/mpls/packet.h> #include <vnet/handoff.h> #include <vnet/devices/devices.h> #include <vnet/interface/rx_queue_funcs.h> #include <vnet/feature/feature.h> #include <dpdk/device/dpdk_priv.h> static char *dpdk_error_strings[] = { #define _(n,s) s, foreach_dpdk_error #undef _ }; /* make sure all flags we need are stored in lower 8 bits */ STATIC_ASSERT ((PKT_RX_IP_CKSUM_BAD | PKT_RX_FDIR) < 256, "dpdk flags not un lower byte, fix needed"); static_always_inline uword dpdk_process_subseq_segs (vlib_main_t * vm, vlib_buffer_t * b, struct rte_mbuf *mb, vlib_buffer_t * bt) { u8 nb_seg = 1; struct rte_mbuf *mb_seg = 0; vlib_buffer_t *b_seg, *b_chain = 0; mb_seg = mb->next; b_chain = b; 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); b_seg = vlib_buffer_from_rte_mbuf (mb_seg); vlib_buffer_copy_template (b_seg, bt); /* * The driver (e.g. virtio) may not put the packet data at the start * of the segment, so don't assume b_seg->current_data == 0 is correct. */ b_seg->current_data = (mb_seg->buf_addr + mb_seg->data_off) - (void *) b_seg->data; b_seg->current_length = mb_seg->data_len; b->total_length_not_including_first_buffer += mb_seg->data_len; b_chain->flags |= VLIB_BUFFER_NEXT_PRESENT; b_chain->next_buffer = vlib_get_buffer_index (vm, b_seg); b_chain = b_seg; mb_seg = mb_seg->next; nb_seg++; } return b->total_length_not_including_first_buffer; } static_always_inline void dpdk_prefetch_mbuf_x4 (struct rte_mbuf *mb[]) { 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); } static_always_inline void dpdk_prefetch_buffer_x4 (struct rte_mbuf *mb[]) { 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); } /** \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. 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. @par Graph mechanics: buffer metadata, next index usage @em Uses: - <code>struct rte_mbuf mb->ol_flags</code> - PKT_RX_IP_CKSUM_BAD @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 u16 dpdk_ol_flags_extract (struct rte_mbuf **mb, u16 * flags, int count) { u16 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] = (u16) 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, u16 * or_flagsp) { u32 n_left = n_rx_packets; vlib_buffer_t *b[4]; struct rte_mbuf **mb = ptd->mbufs; uword n_bytes = 0; u16 *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); 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]); 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); dpdk_prefetch_mbuf_x4 (mb + 4); or_flags |= dpdk_ol_flags_extract (mb, flags, 4); flags += 4; b[0]->current_data = mb[0]->data_off - RTE_PKTMBUF_HEADROOM; n_bytes += b[0]->current_length = mb[0]->data_len; b[1]->current_data = mb[1]->data_off - RTE_PKTMBUF_HEADROOM; n_bytes += b[1]->current_length = mb[1]->data_len; b[2]->current_data = mb[2]->data_off - RTE_PKTMBUF_HEADROOM; n_bytes += b[2]->current_length = mb[2]->data_len; b[3]->current_data = mb[3]->data_off - RTE_PKTMBUF_HEADROOM; n_bytes += b[3]->current_length = mb[3]->data_len; 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); } 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; } 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; b[0]->current_data = mb[0]->data_off - RTE_PKTMBUF_HEADROOM; n_bytes += b[0]->current_length = mb[0]->data_len; if (maybe_multiseg) n_bytes += dpdk_process_subseq_segs (vm, b[0], mb[0], &bt); VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b[0]); /* next */ mb += 1; n_left -= 1; } *or_flagsp = or_flags; return n_bytes; } 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; /* TODO prefetch and quad-loop */ for (n = 0; n < n_rx_packets; n++) { if ((ptd->flags[n] & PKT_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; } if (fle->buffer_advance != ~0) { b0 = vlib_buffer_from_rte_mbuf (ptd->mbufs[n]); vlib_buffer_advance (b0, fle->buffer_advance); } } } 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; u16 or_flags; u32 n; int single_next = 0; 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; /* get up to DPDK_RX_BURST_SZ buffers from PMD */ while (n_rx_packets < DPDK_RX_BURST_SZ) { 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; } if (n_rx_packets == 0) return 0; /* 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 = rxq->buffer_pool_index; bt->ref_count = 1; vnet_buffer (bt)->feature_arc_index = 0; bt->current_config_index = 0; /* receive burst of packets from DPDK PMD */ if (PREDICT_FALSE (xd->per_interface_next_index != ~0)) next_index = xd->per_interface_next_index; /* 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); 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 (or_flags & PKT_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 & PKT_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 { u32 *to_next, n_left_to_next; 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)); if (PREDICT_TRUE (next_index == VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT)) { 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 & PKT_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; } /* 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)); n_left = n_rx_packets; buffers = ptd->buffers; mb = ptd->mbufs; next = ptd->next; while (n_trace && n_left) { b0 = vlib_get_buffer (vm, buffers[0]); if (single_next == 0) next_index = next[0]; if (PREDICT_TRUE (vlib_trace_buffer (vm, node, next_index, 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_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--; } n_left--; buffers++; mb++; next++; } vlib_set_trace_count (vm, node, n_trace); } 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); 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_hw_if_rxq_poll_vector_t *pv; u32 thread_index = node->thread_index; /* * Poll all devices on this cpu for input/interrupts. */ 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; } /* *INDENT-OFF* */ VLIB_REGISTER_NODE (dpdk_input_node) = { .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_trace, .n_errors = DPDK_N_ERROR, .error_strings = dpdk_error_strings, }; /* *INDENT-ON* */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */


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