void dpdk_set_next_node (dpdk_rx_next_t next, char *name)
{
vlib_node_registration_t *r = &dpdk_input_node;
- vlib_node_registration_t *r_io = &dpdk_io_input_node;
vlib_node_registration_t *r_handoff = &handoff_dispatch_node;
switch (next)
case DPDK_RX_NEXT_MPLS_INPUT:
case DPDK_RX_NEXT_ETHERNET_INPUT:
r->next_nodes[next] = name;
- r_io->next_nodes[next] = name;
r_handoff->next_nodes[next] = name;
break;
}
}
-/*
- * This function is used when dedicated IO threads feed the worker threads.
- *
- * Devices are allocated to this thread based on instances and instance_id.
- * If instances==0 then the function automatically determines the number
- * of instances of this thread, and allocates devices between them.
- * If instances != 0, then instance_id must be in the range 0..instances-1.
- * The function allocates devices among the specified number of instances,
- * with this thread having the given instance id. This option is used for
- * splitting devices among differently named "io"-type threads.
- */
-void dpdk_io_thread (vlib_worker_thread_t * w,
- u32 instances,
- u32 instance_id,
- char *worker_name,
- dpdk_io_thread_callback_t callback)
-{
- vlib_main_t * vm = vlib_get_main();
- vlib_thread_main_t * tm = vlib_get_thread_main();
- vlib_thread_registration_t * tr;
- dpdk_main_t * dm = &dpdk_main;
- char *io_name = w->registration->name;
- dpdk_device_t * xd;
- dpdk_device_t ** my_devices = 0;
- vlib_frame_queue_elt_t ** handoff_queue_elt_by_worker_index = 0;
- vlib_frame_queue_t ** congested_handoff_queue_by_worker_index = 0;
- vlib_frame_queue_elt_t * hf = 0;
- int i;
- u32 n_left_to_next_worker = 0, * to_next_worker = 0;
- u32 next_worker_index = 0;
- u32 current_worker_index = ~0;
- u32 cpu_index = os_get_cpu_number();
- u32 num_workers = 0;
- u32 num_devices = 0;
- uword * p;
- u16 queue_id = 0;
- vlib_node_runtime_t * node_trace = 0;
- u32 first_worker_index = 0;
- u32 buffer_flags_template;
-
- /* Wait until the dpdk init sequence is complete */
- while (dm->io_thread_release == 0)
- vlib_worker_thread_barrier_check();
-
- clib_time_init (&vm->clib_time);
-
- p = hash_get_mem (tm->thread_registrations_by_name, worker_name);
- ASSERT (p);
- tr = (vlib_thread_registration_t *) p[0];
- if (tr)
- {
- num_workers = tr->count;
- first_worker_index = tr->first_index;
- }
-
- /* Allocate devices to this thread */
- if (instances == 0)
- {
- /* auto-assign */
- instance_id = w->instance_id;
-
- p = hash_get_mem (tm->thread_registrations_by_name, io_name);
- tr = (vlib_thread_registration_t *) p[0];
- /* Otherwise, how did we get here */
- ASSERT (tr && tr->count);
- instances = tr->count;
- }
- else
- {
- /* manually assign */
- ASSERT (instance_id < instances);
- }
-
- vec_validate (handoff_queue_elt_by_worker_index,
- first_worker_index + num_workers - 1);
-
- vec_validate_init_empty (congested_handoff_queue_by_worker_index,
- first_worker_index + num_workers - 1,
- (vlib_frame_queue_t *)(~0));
-
- buffer_flags_template = dm->buffer_flags_template;
-
- /* And handle them... */
- while (1)
- {
- u32 n_buffers;
- u32 mb_index;
- uword n_rx_bytes = 0;
- u32 n_trace, trace_cnt __attribute__((unused));
- vlib_buffer_free_list_t * fl;
- u32 hash;
- u64 hash_key;
- u8 efd_discard_burst;
-
- vlib_worker_thread_barrier_check ();
-
- /* Invoke callback if supplied */
- if (PREDICT_FALSE(callback != NULL))
- callback(vm);
-
- if (PREDICT_FALSE(vec_len(dm->devices) != num_devices))
- {
- vec_reset_length(my_devices);
- vec_foreach (xd, dm->devices)
- {
- if (((xd - dm->devices) % tr->count) == instance_id)
- {
- fprintf(stderr, "i/o thread %d (cpu %d) takes port %d\n",
- instance_id, (int) os_get_cpu_number(), (int) (xd - dm->devices));
- vec_add1 (my_devices, xd);
- }
- }
- num_devices = vec_len(dm->devices);
- }
-
- for (i = 0; i < vec_len (my_devices); i++)
- {
- xd = my_devices[i];
-
- if (!xd->admin_up)
- continue;
-
- n_buffers = dpdk_rx_burst(dm, xd, 0 /* queue_id */);
-
- if (n_buffers == 0)
- {
- /* check if EFD (dpdk) is enabled */
- if (PREDICT_FALSE(dm->efd.enabled))
- {
- /* reset a few stats */
- xd->efd_agent.last_poll_time = 0;
- xd->efd_agent.last_burst_sz = 0;
- }
- continue;
- }
-
- trace_cnt = n_trace = 0;
- if (PREDICT_FALSE(vm->trace_main.trace_active_hint))
- {
- /*
- * packet tracing is triggered on the dpdk-input node for
- * ease-of-use. Re-fetch the node_runtime for dpdk-input
- * in case it has changed.
- */
- node_trace = vlib_node_get_runtime (vm, dpdk_input_node.index);
-
- vec_reset_length (xd->d_trace_buffers);
- trace_cnt = n_trace = vlib_get_trace_count (vm, node_trace);
- }
-
- /*
- * DAW-FIXME: VMXNET3 device stop/start doesn't work,
- * therefore fake the stop in the dpdk driver by
- * silently dropping all of the incoming pkts instead of
- * stopping the driver / hardware.
- */
- if (PREDICT_FALSE(xd->admin_up != 1))
- {
- for (mb_index = 0; mb_index < n_buffers; mb_index++)
- rte_pktmbuf_free (xd->rx_vectors[queue_id][mb_index]);
- continue;
- }
-
- /* reset EFD action for the burst */
- efd_discard_burst = 0;
-
- /* Check for congestion if EFD (Early-Fast-Discard) is enabled
- * in any mode (e.g. dpdk, monitor, or drop_all)
- */
- if (PREDICT_FALSE(dm->efd.enabled))
- {
- /* update EFD counters */
- dpdk_efd_update_counters(xd, n_buffers, dm->efd.enabled);
-
- if (PREDICT_FALSE(dm->efd.enabled & DPDK_EFD_DROPALL_ENABLED))
- {
- /* drop all received packets */
- for (mb_index = 0; mb_index < n_buffers; mb_index++)
- rte_pktmbuf_free(xd->rx_vectors[queue_id][mb_index]);
-
- xd->efd_agent.discard_cnt += n_buffers;
- increment_efd_drop_counter(vm,
- DPDK_ERROR_VLAN_EFD_DROP_PKTS,
- n_buffers);
-
- continue;
- }
-
- if (PREDICT_FALSE(xd->efd_agent.consec_full_frames_cnt >=
- dm->efd.consec_full_frames_hi_thresh))
- {
- u32 device_queue_sz = rte_eth_rx_queue_count(xd->device_index,
- queue_id);
- if (device_queue_sz >= dm->efd.queue_hi_thresh)
- {
- /* dpdk device queue has reached the critical threshold */
- xd->efd_agent.congestion_cnt++;
-
- /* apply EFD to packets from the burst */
- efd_discard_burst = 1;
- }
- }
- }
-
- fl = vlib_buffer_get_free_list
- (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
-
- mb_index = 0;
-
- while (n_buffers > 0)
- {
- u32 bi0;
- u8 next0, error0;
- u32 l3_offset0;
- vlib_buffer_t * b0, * b_seg, * b_chain = 0;
- ethernet_header_t * h0;
- u8 nb_seg = 1;
- struct rte_mbuf *mb = xd->rx_vectors[queue_id][mb_index];
- struct rte_mbuf *mb_seg = mb->next;
-
- if (PREDICT_TRUE(n_buffers > 1))
- {
- struct rte_mbuf *pfmb = xd->rx_vectors[queue_id][mb_index+2];
- vlib_buffer_t *bp = vlib_buffer_from_rte_mbuf(pfmb);
- CLIB_PREFETCH (pfmb, CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (bp, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (bp->data, CLIB_CACHE_LINE_BYTES, LOAD);
- }
-
- b0 = vlib_buffer_from_rte_mbuf(mb);
-
- /* check whether EFD is looking for packets to discard */
- if (PREDICT_FALSE(efd_discard_burst))
- {
- u32 cntr_type;
- if (PREDICT_TRUE(cntr_type = is_efd_discardable(tm, b0, mb)))
- {
- rte_pktmbuf_free(mb);
- xd->efd_agent.discard_cnt++;
- increment_efd_drop_counter(vm,
- cntr_type,
- 1);
-
- n_buffers--;
- mb_index++;
- continue;
- }
- }
-
- /* Prefetch one next segment if it exists */
- if (PREDICT_FALSE(mb->nb_segs > 1))
- {
- struct rte_mbuf *pfmb = mb->next;
- vlib_buffer_t *bp = vlib_buffer_from_rte_mbuf(pfmb);
- CLIB_PREFETCH (pfmb, CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (bp, CLIB_CACHE_LINE_BYTES, STORE);
- b_chain = b0;
- }
-
- bi0 = vlib_get_buffer_index (vm, b0);
- vlib_buffer_init_for_free_list (b0, fl);
- b0->clone_count = 0;
-
- dpdk_rx_next_and_error_from_mb_flags_x1 (xd, mb, b0,
- &next0, &error0);
-#ifdef RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS
- /*
- * Clear overloaded TX offload flags when a DPDK driver
- * is using them for RX flags (e.g. Cisco VIC Ethernet driver)
- */
- if (PREDICT_TRUE(trace_cnt == 0))
- mb->ol_flags &= PKT_EXT_RX_CLR_TX_FLAGS_MASK;
- else
- trace_cnt--;
-#endif /* RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS */
-
- if (error0)
- clib_warning ("bi %d error %d", bi0, error0);
-
- b0->error = 0;
-
- l3_offset0 = ((next0 == DPDK_RX_NEXT_IP4_INPUT ||
- next0 == DPDK_RX_NEXT_IP6_INPUT ||
- next0 == DPDK_RX_NEXT_MPLS_INPUT) ?
- sizeof (ethernet_header_t) : 0);
-
- b0->current_data = l3_offset0;
- /* Some drivers like fm10k receive frames with
- mb->data_off > RTE_PKTMBUF_HEADROOM */
- b0->current_data += mb->data_off - RTE_PKTMBUF_HEADROOM;
- b0->current_length = mb->data_len - l3_offset0;
-
- b0->flags = buffer_flags_template;
-
- if (VMWARE_LENGTH_BUG_WORKAROUND)
- b0->current_length -= 4;
-
- vnet_buffer(b0)->sw_if_index[VLIB_RX] = xd->vlib_sw_if_index;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = (u32)~0;
- vnet_buffer(b0)->handoff.next_index = next0;
- n_rx_bytes += mb->pkt_len;
-
- /* Process subsequent segments of multi-segment packets */
- while ((mb->nb_segs > 1) && (nb_seg < mb->nb_segs))
- {
- ASSERT(mb_seg != 0);
-
- b_seg = vlib_buffer_from_rte_mbuf(mb_seg);
- vlib_buffer_init_for_free_list (b_seg, fl);
- b_seg->clone_count = 0;
-
- ASSERT((b_seg->flags & VLIB_BUFFER_NEXT_PRESENT) == 0);
- ASSERT(b_seg->current_data == 0);
-
- /*
- * 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;
- b0->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++;
- }
-
- /*
- * 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 (PREDICT_FALSE (n_trace > mb_index))
- vec_add1 (xd->d_trace_buffers, bi0);
-
- next_worker_index = first_worker_index;
-
- /*
- * Force unknown traffic onto worker 0,
- * and into ethernet-input. $$$$ add more hashes.
- */
- h0 = (ethernet_header_t *) b0->data;
-
- /* Compute ingress LB hash */
- hash_key = eth_get_key(h0);
- hash = (u32)clib_xxhash(hash_key);
-
- if (PREDICT_TRUE (is_pow2(num_workers)))
- next_worker_index += hash & (num_workers - 1);
- else
- next_worker_index += hash % num_workers;
-
- /* if EFD is enabled and not already discarding from dpdk,
- * check the worker ring/queue for congestion
- */
- if (PREDICT_FALSE(tm->efd.enabled && !efd_discard_burst))
- {
- vlib_frame_queue_t *fq;
-
- /* fq will be valid if the ring is congested */
- fq = is_vlib_handoff_queue_congested(
- next_worker_index, tm->efd.queue_hi_thresh,
- congested_handoff_queue_by_worker_index);
-
- if (PREDICT_FALSE(fq != NULL))
- {
- u32 cntr_type;
- if (PREDICT_TRUE(cntr_type =
- is_efd_discardable(tm, b0, mb)))
- {
- /* discard the packet */
- fq->enqueue_efd_discards++;
- increment_efd_drop_counter(vm, cntr_type, 1);
- rte_pktmbuf_free(mb);
- n_buffers--;
- mb_index++;
- continue;
- }
- }
- }
-
- if (next_worker_index != current_worker_index)
- {
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
-
- hf = dpdk_get_handoff_queue_elt(
- next_worker_index,
- handoff_queue_elt_by_worker_index);
-
- n_left_to_next_worker = VLIB_FRAME_SIZE - hf->n_vectors;
- to_next_worker = &hf->buffer_index[hf->n_vectors];
- current_worker_index = next_worker_index;
- }
-
- /* enqueue to correct worker thread */
- to_next_worker[0] = bi0;
- to_next_worker++;
- n_left_to_next_worker--;
-
- if (n_left_to_next_worker == 0)
- {
- hf->n_vectors = VLIB_FRAME_SIZE;
- vlib_put_handoff_queue_elt(hf);
- current_worker_index = ~0;
- handoff_queue_elt_by_worker_index[next_worker_index] = 0;
- hf = 0;
- }
-
- n_buffers--;
- mb_index++;
- }
-
- if (PREDICT_FALSE (vec_len (xd->d_trace_buffers) > 0))
- {
- /* credit the trace to the trace node */
- dpdk_rx_trace (dm, node_trace, xd, queue_id, xd->d_trace_buffers,
- vec_len (xd->d_trace_buffers));
- vlib_set_trace_count (vm, node_trace, n_trace - vec_len (xd->d_trace_buffers));
- }
-
- 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);
-
- dpdk_worker_t * dw = vec_elt_at_index(dm->workers, cpu_index);
- dw->aggregate_rx_packets += mb_index;
- }
-
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
-
- /* Ship frames to the worker nodes */
- for (i = 0; i < vec_len (handoff_queue_elt_by_worker_index); i++)
- {
- if (handoff_queue_elt_by_worker_index[i])
- {
- hf = handoff_queue_elt_by_worker_index[i];
- /*
- * It works better to let the handoff node
- * rate-adapt, always ship the handoff queue element.
- */
- if (1 || hf->n_vectors == hf->last_n_vectors)
- {
- vlib_put_handoff_queue_elt(hf);
- handoff_queue_elt_by_worker_index[i] = 0;
- }
- else
- hf->last_n_vectors = hf->n_vectors;
- }
- congested_handoff_queue_by_worker_index[i] = (vlib_frame_queue_t *)(~0);
- }
- hf = 0;
- current_worker_index = ~0;
-
- vlib_increment_main_loop_counter (vm);
- }
-}
-
-/*
- * This function is used when the main thread performs IO and feeds the
- * worker threads.
- */
-static uword
-dpdk_io_input (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * f)
-{
- dpdk_main_t * dm = &dpdk_main;
- dpdk_device_t * xd;
- vlib_thread_main_t * tm = vlib_get_thread_main();
- uword n_rx_packets = 0;
- static vlib_frame_queue_elt_t ** handoff_queue_elt_by_worker_index;
- static vlib_frame_queue_t ** congested_handoff_queue_by_worker_index = 0;
- vlib_frame_queue_elt_t * hf = 0;
- int i;
- u32 n_left_to_next_worker = 0, * to_next_worker = 0;
- u32 next_worker_index = 0;
- u32 current_worker_index = ~0;
- u32 cpu_index = os_get_cpu_number();
- static int num_workers_set;
- static u32 num_workers;
- u16 queue_id = 0;
- vlib_node_runtime_t * node_trace;
- static u32 first_worker_index;
- u32 buffer_flags_template;
-
- if (PREDICT_FALSE(num_workers_set == 0))
- {
- uword * p;
- vlib_thread_registration_t * tr;
- /* Only the standard vnet worker threads are supported */
- p = hash_get_mem (tm->thread_registrations_by_name, "workers");
- tr = (vlib_thread_registration_t *) p[0];
- if (tr)
- {
- num_workers = tr->count;
- first_worker_index = tr->first_index;
- }
- num_workers_set = 1;
- }
-
- if (PREDICT_FALSE(handoff_queue_elt_by_worker_index == 0))
- {
- vec_validate (handoff_queue_elt_by_worker_index, tm->n_vlib_mains - 1);
-
- vec_validate_init_empty (congested_handoff_queue_by_worker_index,
- first_worker_index + num_workers - 1,
- (vlib_frame_queue_t *)(~0));
- }
-
- /* packet tracing is triggered on the dpdk-input node for ease-of-use */
- node_trace = vlib_node_get_runtime (vm, dpdk_input_node.index);
-
- buffer_flags_template = dm->buffer_flags_template;
-
- vec_foreach (xd, dm->devices)
- {
- u32 n_buffers;
- u32 mb_index;
- uword n_rx_bytes = 0;
- u32 n_trace, trace_cnt __attribute__((unused));
- vlib_buffer_free_list_t * fl;
- u32 hash;
- u64 hash_key;
- u8 efd_discard_burst = 0;
-
- if (!xd->admin_up)
- continue;
-
- n_buffers = dpdk_rx_burst(dm, xd, queue_id );
-
- if (n_buffers == 0)
- {
- /* check if EFD (dpdk) is enabled */
- if (PREDICT_FALSE(dm->efd.enabled))
- {
- /* reset a few stats */
- xd->efd_agent.last_poll_time = 0;
- xd->efd_agent.last_burst_sz = 0;
- }
- continue;
- }
-
- vec_reset_length (xd->d_trace_buffers);
- trace_cnt = n_trace = vlib_get_trace_count (vm, node_trace);
-
- /*
- * DAW-FIXME: VMXNET3 device stop/start doesn't work,
- * therefore fake the stop in the dpdk driver by
- * silently dropping all of the incoming pkts instead of
- * stopping the driver / hardware.
- */
- if (PREDICT_FALSE(xd->admin_up != 1))
- {
- for (mb_index = 0; mb_index < n_buffers; mb_index++)
- rte_pktmbuf_free (xd->rx_vectors[queue_id][mb_index]);
- continue;
- }
-
- /* Check for congestion if EFD (Early-Fast-Discard) is enabled
- * in any mode (e.g. dpdk, monitor, or drop_all)
- */
- if (PREDICT_FALSE(dm->efd.enabled))
- {
- /* update EFD counters */
- dpdk_efd_update_counters(xd, n_buffers, dm->efd.enabled);
-
- if (PREDICT_FALSE(dm->efd.enabled & DPDK_EFD_DROPALL_ENABLED))
- {
- /* discard all received packets */
- for (mb_index = 0; mb_index < n_buffers; mb_index++)
- rte_pktmbuf_free(xd->rx_vectors[queue_id][mb_index]);
-
- xd->efd_agent.discard_cnt += n_buffers;
- increment_efd_drop_counter(vm,
- DPDK_ERROR_VLAN_EFD_DROP_PKTS,
- n_buffers);
-
- continue;
- }
-
- if (PREDICT_FALSE(xd->efd_agent.consec_full_frames_cnt >=
- dm->efd.consec_full_frames_hi_thresh))
- {
- u32 device_queue_sz = rte_eth_rx_queue_count(xd->device_index,
- queue_id);
- if (device_queue_sz >= dm->efd.queue_hi_thresh)
- {
- /* dpdk device queue has reached the critical threshold */
- xd->efd_agent.congestion_cnt++;
-
- /* apply EFD to packets from the burst */
- efd_discard_burst = 1;
- }
- }
- }
-
- fl = vlib_buffer_get_free_list
- (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
-
- mb_index = 0;
-
- while (n_buffers > 0)
- {
- u32 bi0;
- u8 next0, error0;
- u32 l3_offset0;
- vlib_buffer_t * b0, * b_seg, * b_chain = 0;
- ethernet_header_t * h0;
- u8 nb_seg = 1;
- struct rte_mbuf *mb = xd->rx_vectors[queue_id][mb_index];
- struct rte_mbuf *mb_seg = mb->next;
-
- if (PREDICT_TRUE(n_buffers > 1))
- {
- struct rte_mbuf *pfmb = xd->rx_vectors[queue_id][mb_index+2];
- vlib_buffer_t *bp = vlib_buffer_from_rte_mbuf(pfmb);
- CLIB_PREFETCH (pfmb, CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (bp, CLIB_CACHE_LINE_BYTES, STORE);
- CLIB_PREFETCH (bp->data, CLIB_CACHE_LINE_BYTES, LOAD);
- }
-
- b0 = vlib_buffer_from_rte_mbuf(mb);
-
- /* check whether EFD is looking for packets to discard */
- if (PREDICT_FALSE(efd_discard_burst))
- {
- u32 cntr_type;
- if (PREDICT_TRUE(cntr_type = is_efd_discardable(tm, b0, mb)))
- {
- rte_pktmbuf_free(mb);
- xd->efd_agent.discard_cnt++;
- increment_efd_drop_counter(vm,
- cntr_type,
- 1);
-
- n_buffers--;
- mb_index++;
- continue;
- }
- }
-
- /* Prefetch one next segment if it exists */
- if (PREDICT_FALSE(mb->nb_segs > 1))
- {
- struct rte_mbuf *pfmb = mb->next;
- vlib_buffer_t *bp = vlib_buffer_from_rte_mbuf(pfmb);
- CLIB_PREFETCH (pfmb, CLIB_CACHE_LINE_BYTES, LOAD);
- CLIB_PREFETCH (bp, CLIB_CACHE_LINE_BYTES, STORE);
- b_chain = b0;
- }
-
- bi0 = vlib_get_buffer_index (vm, b0);
- vlib_buffer_init_for_free_list (b0, fl);
- b0->clone_count = 0;
-
- dpdk_rx_next_and_error_from_mb_flags_x1 (xd, mb, b0,
- &next0, &error0);
-#ifdef RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS
- /*
- * Clear overloaded TX offload flags when a DPDK driver
- * is using them for RX flags (e.g. Cisco VIC Ethernet driver)
- */
- if (PREDICT_TRUE(trace_cnt == 0))
- mb->ol_flags &= PKT_EXT_RX_CLR_TX_FLAGS_MASK;
- else
- trace_cnt--;
-#endif /* RTE_LIBRTE_MBUF_EXT_RX_OLFLAGS */
-
- if (error0)
- clib_warning ("bi %d error %d", bi0, error0);
-
- b0->error = 0;
-
- l3_offset0 = ((next0 == DPDK_RX_NEXT_IP4_INPUT ||
- next0 == DPDK_RX_NEXT_IP6_INPUT ||
- next0 == DPDK_RX_NEXT_MPLS_INPUT) ?
- sizeof (ethernet_header_t) : 0);
-
- b0->current_data = l3_offset0;
- b0->current_length = mb->data_len - l3_offset0;
-
- b0->flags = buffer_flags_template;
-
- if (VMWARE_LENGTH_BUG_WORKAROUND)
- b0->current_length -= 4;
-
- vnet_buffer(b0)->sw_if_index[VLIB_RX] = xd->vlib_sw_if_index;
- vnet_buffer(b0)->sw_if_index[VLIB_TX] = (u32)~0;
- vnet_buffer(b0)->handoff.next_index = next0;
- n_rx_bytes += mb->pkt_len;
-
- /* Process subsequent segments of multi-segment packets */
- while ((mb->nb_segs > 1) && (nb_seg < mb->nb_segs))
- {
- ASSERT(mb_seg != 0);
-
- b_seg = vlib_buffer_from_rte_mbuf(mb_seg);
- vlib_buffer_init_for_free_list (b_seg, fl);
- b_seg->clone_count = 0;
-
- ASSERT((b_seg->flags & VLIB_BUFFER_NEXT_PRESENT) == 0);
- ASSERT(b_seg->current_data == 0);
-
- /*
- * 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;
- b0->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++;
- }
-
- /*
- * 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 (PREDICT_FALSE (n_trace > mb_index))
- vec_add1 (xd->d_trace_buffers, bi0);
-
- next_worker_index = first_worker_index;
-
- /*
- * Force unknown traffic onto worker 0,
- * and into ethernet-input. $$$$ add more hashes.
- */
- h0 = (ethernet_header_t *) b0->data;
-
- /* Compute ingress LB hash */
- hash_key = eth_get_key(h0);
- hash = (u32)clib_xxhash(hash_key);
-
- if (PREDICT_TRUE (is_pow2(num_workers)))
- next_worker_index += hash & (num_workers - 1);
- else
- next_worker_index += hash % num_workers;
-
- /* if EFD is enabled and not already discarding from dpdk,
- * check the worker ring/queue for congestion
- */
- if (PREDICT_FALSE(tm->efd.enabled && !efd_discard_burst))
- {
- vlib_frame_queue_t *fq;
-
- /* fq will be valid if the ring is congested */
- fq = is_vlib_handoff_queue_congested(
- next_worker_index, tm->efd.queue_hi_thresh,
- congested_handoff_queue_by_worker_index);
-
- if (PREDICT_FALSE(fq != NULL))
- {
- u32 cntr_type;
- if (PREDICT_TRUE(cntr_type =
- is_efd_discardable(tm, b0, mb)))
- {
- /* discard the packet */
- fq->enqueue_efd_discards++;
- increment_efd_drop_counter(vm, cntr_type, 1);
- rte_pktmbuf_free(mb);
- n_buffers--;
- mb_index++;
- continue;
- }
- }
- }
-
- if (next_worker_index != current_worker_index)
- {
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
-
- hf = dpdk_get_handoff_queue_elt(
- next_worker_index,
- handoff_queue_elt_by_worker_index);
-
- n_left_to_next_worker = VLIB_FRAME_SIZE - hf->n_vectors;
- to_next_worker = &hf->buffer_index[hf->n_vectors];
- current_worker_index = next_worker_index;
- }
-
- /* enqueue to correct worker thread */
- to_next_worker[0] = bi0;
- to_next_worker++;
- n_left_to_next_worker--;
-
- if (n_left_to_next_worker == 0)
- {
- hf->n_vectors = VLIB_FRAME_SIZE;
- vlib_put_handoff_queue_elt(hf);
- current_worker_index = ~0;
- handoff_queue_elt_by_worker_index[next_worker_index] = 0;
- hf = 0;
- }
-
- n_buffers--;
- mb_index++;
- }
-
- if (PREDICT_FALSE (vec_len (xd->d_trace_buffers) > 0))
- {
- /* credit the trace to the trace node */
- dpdk_rx_trace (dm, node_trace, xd, queue_id, xd->d_trace_buffers,
- vec_len (xd->d_trace_buffers));
- vlib_set_trace_count (vm, node_trace, n_trace - vec_len (xd->d_trace_buffers));
- }
-
- 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);
-
- dpdk_worker_t * dw = vec_elt_at_index(dm->workers, cpu_index);
- dw->aggregate_rx_packets += mb_index;
- n_rx_packets += mb_index;
- }
-
- if (hf)
- hf->n_vectors = VLIB_FRAME_SIZE - n_left_to_next_worker;
-
- /* Ship frames to the worker nodes */
- for (i = 0; i < vec_len (handoff_queue_elt_by_worker_index); i++)
- {
- if (handoff_queue_elt_by_worker_index[i])
- {
- hf = handoff_queue_elt_by_worker_index[i];
- /*
- * It works better to let the handoff node
- * rate-adapt, always ship the handoff queue element.
- */
- if (1 || hf->n_vectors == hf->last_n_vectors)
- {
- vlib_put_handoff_queue_elt(hf);
- handoff_queue_elt_by_worker_index[i] = 0;
- }
- else
- hf->last_n_vectors = hf->n_vectors;
- }
- congested_handoff_queue_by_worker_index[i] = (vlib_frame_queue_t *)(~0);
- }
- hf = 0;
- current_worker_index = ~0;
- return n_rx_packets;
-}
-
-VLIB_REGISTER_NODE (dpdk_io_input_node) = {
- .function = dpdk_io_input,
- .type = VLIB_NODE_TYPE_INPUT,
- .name = "dpdk-io-input",
-
- /* 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,
-
- .n_errors = DPDK_N_ERROR,
- .error_strings = dpdk_error_strings,
-
- .n_next_nodes = DPDK_RX_N_NEXT,
- .next_nodes = {
- [DPDK_RX_NEXT_DROP] = "error-drop",
- [DPDK_RX_NEXT_ETHERNET_INPUT] = "ethernet-input",
- [DPDK_RX_NEXT_IP4_INPUT] = "ip4-input-no-checksum",
- [DPDK_RX_NEXT_IP6_INPUT] = "ip6-input",
- [DPDK_RX_NEXT_MPLS_INPUT] = "mpls-gre-input",
- },
-};
-
/*
* set_efd_bitmap()
* Based on the operation type, set lower/upper bits for the given index value
Code Review / vpp.git / commitdiff