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-rw-r--r--src/plugins/dpdk/device/device.c856
1 files changed, 856 insertions, 0 deletions
diff --git a/src/plugins/dpdk/device/device.c b/src/plugins/dpdk/device/device.c
new file mode 100644
index 00000000..aa134327
--- /dev/null
+++ b/src/plugins/dpdk/device/device.c
@@ -0,0 +1,856 @@
+/*
+ * 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/format.h>
+#include <vlib/unix/cj.h>
+#include <assert.h>
+
+#include <vnet/ethernet/ethernet.h>
+#include <dpdk/device/dpdk.h>
+
+#include <dpdk/device/dpdk_priv.h>
+#include <vppinfra/error.h>
+
+#define foreach_dpdk_tx_func_error \
+ _(BAD_RETVAL, "DPDK tx function returned an error") \
+ _(RING_FULL, "Tx packet drops (ring full)") \
+ _(PKT_DROP, "Tx packet drops (dpdk tx failure)") \
+ _(REPL_FAIL, "Tx packet drops (replication failure)")
+
+typedef enum
+{
+#define _(f,s) DPDK_TX_FUNC_ERROR_##f,
+ foreach_dpdk_tx_func_error
+#undef _
+ DPDK_TX_FUNC_N_ERROR,
+} dpdk_tx_func_error_t;
+
+static char *dpdk_tx_func_error_strings[] = {
+#define _(n,s) s,
+ foreach_dpdk_tx_func_error
+#undef _
+};
+
+static clib_error_t *
+dpdk_set_mac_address (vnet_hw_interface_t * hi, char *address)
+{
+ int error;
+ dpdk_main_t *dm = &dpdk_main;
+ dpdk_device_t *xd = vec_elt_at_index (dm->devices, hi->dev_instance);
+
+ error = rte_eth_dev_default_mac_addr_set (xd->device_index,
+ (struct ether_addr *) address);
+
+ if (error)
+ {
+ return clib_error_return (0, "mac address set failed: %d", error);
+ }
+ else
+ {
+ vec_reset_length (xd->default_mac_address);
+ vec_add (xd->default_mac_address, address, sizeof (address));
+ return NULL;
+ }
+}
+
+struct rte_mbuf *
+dpdk_replicate_packet_mb (vlib_buffer_t * b)
+{
+ dpdk_main_t *dm = &dpdk_main;
+ struct rte_mbuf **mbufs = 0, *s, *d;
+ u8 nb_segs;
+ unsigned socket_id = rte_socket_id ();
+ int i;
+
+ ASSERT (dm->pktmbuf_pools[socket_id]);
+ s = rte_mbuf_from_vlib_buffer (b);
+ nb_segs = s->nb_segs;
+ vec_validate (mbufs, nb_segs - 1);
+
+ if (rte_pktmbuf_alloc_bulk (dm->pktmbuf_pools[socket_id], mbufs, nb_segs))
+ {
+ vec_free (mbufs);
+ return 0;
+ }
+
+ d = mbufs[0];
+ d->nb_segs = s->nb_segs;
+ d->data_len = s->data_len;
+ d->pkt_len = s->pkt_len;
+ d->data_off = s->data_off;
+ clib_memcpy (d->buf_addr, s->buf_addr, RTE_PKTMBUF_HEADROOM + s->data_len);
+
+ for (i = 1; i < nb_segs; i++)
+ {
+ d->next = mbufs[i];
+ d = mbufs[i];
+ s = s->next;
+ d->data_len = s->data_len;
+ clib_memcpy (d->buf_addr, s->buf_addr,
+ RTE_PKTMBUF_HEADROOM + s->data_len);
+ }
+
+ d = mbufs[0];
+ vec_free (mbufs);
+ return d;
+}
+
+static void
+dpdk_tx_trace_buffer (dpdk_main_t * dm,
+ vlib_node_runtime_t * node,
+ dpdk_device_t * xd,
+ u16 queue_id, u32 buffer_index, vlib_buffer_t * buffer)
+{
+ vlib_main_t *vm = vlib_get_main ();
+ dpdk_tx_dma_trace_t *t0;
+ struct rte_mbuf *mb;
+
+ mb = rte_mbuf_from_vlib_buffer (buffer);
+
+ t0 = vlib_add_trace (vm, node, buffer, sizeof (t0[0]));
+ t0->queue_index = queue_id;
+ t0->device_index = xd->device_index;
+ t0->buffer_index = buffer_index;
+ clib_memcpy (&t0->mb, mb, sizeof (t0->mb));
+ clib_memcpy (&t0->buffer, buffer,
+ sizeof (buffer[0]) - sizeof (buffer->pre_data));
+ clib_memcpy (t0->buffer.pre_data, buffer->data + buffer->current_data,
+ sizeof (t0->buffer.pre_data));
+}
+
+static_always_inline void
+dpdk_validate_rte_mbuf (vlib_main_t * vm, vlib_buffer_t * b,
+ int maybe_multiseg)
+{
+ struct rte_mbuf *mb, *first_mb, *last_mb;
+
+ /* buffer is coming from non-dpdk source so we need to init
+ rte_mbuf header */
+ if (PREDICT_FALSE ((b->flags & VLIB_BUFFER_EXT_HDR_VALID) == 0))
+ {
+ vlib_buffer_t *b2 = b;
+ last_mb = mb = rte_mbuf_from_vlib_buffer (b2);
+ rte_pktmbuf_reset (mb);
+ while (maybe_multiseg && (b2->flags & VLIB_BUFFER_NEXT_PRESENT))
+ {
+ b2 = vlib_get_buffer (vm, b2->next_buffer);
+ mb = rte_mbuf_from_vlib_buffer (b2);
+ rte_pktmbuf_reset (mb);
+ }
+ }
+
+ last_mb = first_mb = mb = rte_mbuf_from_vlib_buffer (b);
+ first_mb->nb_segs = 1;
+ mb->data_len = b->current_length;
+ mb->pkt_len = maybe_multiseg ? vlib_buffer_length_in_chain (vm, b) :
+ b->current_length;
+ mb->data_off = VLIB_BUFFER_PRE_DATA_SIZE + b->current_data;
+
+ while (maybe_multiseg && (b->flags & VLIB_BUFFER_NEXT_PRESENT))
+ {
+ b = vlib_get_buffer (vm, b->next_buffer);
+ mb = rte_mbuf_from_vlib_buffer (b);
+ last_mb->next = mb;
+ last_mb = mb;
+ mb->data_len = b->current_length;
+ mb->pkt_len = b->current_length;
+ mb->data_off = VLIB_BUFFER_PRE_DATA_SIZE + b->current_data;
+ first_mb->nb_segs++;
+ if (PREDICT_FALSE (b->n_add_refs))
+ {
+ rte_mbuf_refcnt_update (mb, b->n_add_refs);
+ b->n_add_refs = 0;
+ }
+ }
+}
+
+/*
+ * This function calls the dpdk's tx_burst function to transmit the packets
+ * on the tx_vector. It manages a lock per-device if the device does not
+ * support multiple queues. It returns the number of packets untransmitted
+ * on the tx_vector. If all packets are transmitted (the normal case), the
+ * function returns 0.
+ *
+ * The function assumes there is at least one packet on the tx_vector.
+ */
+static_always_inline
+ u32 tx_burst_vector_internal (vlib_main_t * vm,
+ dpdk_device_t * xd,
+ struct rte_mbuf **tx_vector)
+{
+ dpdk_main_t *dm = &dpdk_main;
+ u32 n_packets;
+ u32 tx_head;
+ u32 tx_tail;
+ u32 n_retry;
+ int rv;
+ int queue_id;
+ tx_ring_hdr_t *ring;
+
+ ring = vec_header (tx_vector, sizeof (*ring));
+
+ n_packets = ring->tx_head - ring->tx_tail;
+
+ tx_head = ring->tx_head % xd->nb_tx_desc;
+
+ /*
+ * Ensure rte_eth_tx_burst is not called with 0 packets, which can lead to
+ * unpredictable results.
+ */
+ ASSERT (n_packets > 0);
+
+ /*
+ * Check for tx_vector overflow. If this fails it is a system configuration
+ * error. The ring should be sized big enough to handle the largest un-flowed
+ * off burst from a traffic manager. A larger size also helps performance
+ * a bit because it decreases the probability of having to issue two tx_burst
+ * calls due to a ring wrap.
+ */
+ ASSERT (n_packets < xd->nb_tx_desc);
+ ASSERT (ring->tx_tail == 0);
+
+ n_retry = 16;
+ queue_id = vm->thread_index;
+
+ do
+ {
+ /* start the burst at the tail */
+ tx_tail = ring->tx_tail % xd->nb_tx_desc;
+
+ /*
+ * This device only supports one TX queue,
+ * and we're running multi-threaded...
+ */
+ if (PREDICT_FALSE (xd->lockp != 0))
+ {
+ queue_id = queue_id % xd->tx_q_used;
+ while (__sync_lock_test_and_set (xd->lockp[queue_id], 1))
+ /* zzzz */
+ queue_id = (queue_id + 1) % xd->tx_q_used;
+ }
+
+ if (PREDICT_FALSE (xd->flags & DPDK_DEVICE_FLAG_HQOS)) /* HQoS ON */
+ {
+ /* no wrap, transmit in one burst */
+ dpdk_device_hqos_per_worker_thread_t *hqos =
+ &xd->hqos_wt[vm->thread_index];
+
+ ASSERT (hqos->swq != NULL);
+
+ dpdk_hqos_metadata_set (hqos,
+ &tx_vector[tx_tail], tx_head - tx_tail);
+ rv = rte_ring_sp_enqueue_burst (hqos->swq,
+ (void **) &tx_vector[tx_tail],
+ (uint16_t) (tx_head - tx_tail), 0);
+ }
+ else if (PREDICT_TRUE (xd->flags & DPDK_DEVICE_FLAG_PMD))
+ {
+ /* no wrap, transmit in one burst */
+ rv = rte_eth_tx_burst (xd->device_index,
+ (uint16_t) queue_id,
+ &tx_vector[tx_tail],
+ (uint16_t) (tx_head - tx_tail));
+ }
+ else
+ {
+ ASSERT (0);
+ rv = 0;
+ }
+
+ if (PREDICT_FALSE (xd->lockp != 0))
+ *xd->lockp[queue_id] = 0;
+
+ if (PREDICT_FALSE (rv < 0))
+ {
+ // emit non-fatal message, bump counter
+ vnet_main_t *vnm = dm->vnet_main;
+ vnet_interface_main_t *im = &vnm->interface_main;
+ u32 node_index;
+
+ node_index = vec_elt_at_index (im->hw_interfaces,
+ xd->hw_if_index)->tx_node_index;
+
+ vlib_error_count (vm, node_index, DPDK_TX_FUNC_ERROR_BAD_RETVAL, 1);
+ clib_warning ("rte_eth_tx_burst[%d]: error %d", xd->device_index,
+ rv);
+ return n_packets; // untransmitted packets
+ }
+ ring->tx_tail += (u16) rv;
+ n_packets -= (uint16_t) rv;
+ }
+ while (rv && n_packets && (n_retry > 0));
+
+ return n_packets;
+}
+
+static_always_inline void
+dpdk_prefetch_buffer_by_index (vlib_main_t * vm, u32 bi)
+{
+ vlib_buffer_t *b;
+ struct rte_mbuf *mb;
+ b = vlib_get_buffer (vm, bi);
+ mb = rte_mbuf_from_vlib_buffer (b);
+ CLIB_PREFETCH (mb, 2 * CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (b, CLIB_CACHE_LINE_BYTES, LOAD);
+}
+
+static_always_inline void
+dpdk_buffer_recycle (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_buffer_t * b, u32 bi, struct rte_mbuf **mbp)
+{
+ dpdk_main_t *dm = &dpdk_main;
+ u32 my_cpu = vm->thread_index;
+ struct rte_mbuf *mb_new;
+
+ if (PREDICT_FALSE (b->flags & VLIB_BUFFER_RECYCLE) == 0)
+ return;
+
+ mb_new = dpdk_replicate_packet_mb (b);
+ if (PREDICT_FALSE (mb_new == 0))
+ {
+ vlib_error_count (vm, node->node_index,
+ DPDK_TX_FUNC_ERROR_REPL_FAIL, 1);
+ b->flags |= VLIB_BUFFER_REPL_FAIL;
+ }
+ else
+ *mbp = mb_new;
+
+ vec_add1 (dm->recycle[my_cpu], bi);
+}
+
+static_always_inline void
+dpdk_buffer_tx_offload (dpdk_device_t * xd, vlib_buffer_t * b,
+ struct rte_mbuf *mb)
+{
+ u32 ip_cksum = b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
+ u32 tcp_cksum = b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
+ u32 udp_cksum = b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
+ int is_ip4 = b->flags & VNET_BUFFER_F_IS_IP4;
+ u64 ol_flags;
+
+ /* Is there any work for us? */
+ if (PREDICT_TRUE ((ip_cksum | tcp_cksum | udp_cksum) == 0))
+ return;
+
+ mb->l2_len = vnet_buffer (b)->l3_hdr_offset - b->current_data;
+ mb->l3_len = vnet_buffer (b)->l4_hdr_offset -
+ vnet_buffer (b)->l3_hdr_offset;
+ mb->outer_l3_len = 0;
+ mb->outer_l2_len = 0;
+ ol_flags = is_ip4 ? PKT_TX_IPV4 : PKT_TX_IPV6;
+ ol_flags |= ip_cksum ? PKT_TX_IP_CKSUM : 0;
+ ol_flags |= tcp_cksum ? PKT_TX_TCP_CKSUM : 0;
+ ol_flags |= udp_cksum ? PKT_TX_UDP_CKSUM : 0;
+ mb->ol_flags |= ol_flags;
+
+ /* we are trying to help compiler here by using local ol_flags with known
+ state of all flags */
+ if (xd->flags & DPDK_DEVICE_FLAG_INTEL_PHDR_CKSUM)
+ rte_net_intel_cksum_flags_prepare (mb, ol_flags);
+}
+
+/*
+ * Transmits the packets on the frame to the interface associated with the
+ * node. It first copies packets on the frame to a tx_vector containing the
+ * rte_mbuf pointers. It then passes this vector to tx_burst_vector_internal
+ * which calls the dpdk tx_burst function.
+ */
+static uword
+dpdk_interface_tx (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * f)
+{
+ dpdk_main_t *dm = &dpdk_main;
+ vnet_interface_output_runtime_t *rd = (void *) node->runtime_data;
+ dpdk_device_t *xd = vec_elt_at_index (dm->devices, rd->dev_instance);
+ u32 n_packets = f->n_vectors;
+ u32 n_left;
+ u32 *from;
+ struct rte_mbuf **tx_vector;
+ u16 i;
+ u16 nb_tx_desc = xd->nb_tx_desc;
+ int queue_id;
+ u32 my_cpu;
+ u32 tx_pkts = 0;
+ tx_ring_hdr_t *ring;
+ u32 n_on_ring;
+
+ my_cpu = vm->thread_index;
+
+ queue_id = my_cpu;
+
+ tx_vector = xd->tx_vectors[queue_id];
+ ring = vec_header (tx_vector, sizeof (*ring));
+
+ n_on_ring = ring->tx_head - ring->tx_tail;
+ from = vlib_frame_vector_args (f);
+
+ ASSERT (n_packets <= VLIB_FRAME_SIZE);
+
+ if (PREDICT_FALSE (n_on_ring + n_packets > nb_tx_desc))
+ {
+ /*
+ * Overflowing the ring should never happen.
+ * If it does then drop the whole frame.
+ */
+ vlib_error_count (vm, node->node_index, DPDK_TX_FUNC_ERROR_RING_FULL,
+ n_packets);
+
+ while (n_packets--)
+ {
+ u32 bi0 = from[n_packets];
+ vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
+ struct rte_mbuf *mb0 = rte_mbuf_from_vlib_buffer (b0);
+ rte_pktmbuf_free (mb0);
+ }
+ return n_on_ring;
+ }
+
+ if (PREDICT_FALSE (dm->tx_pcap_enable))
+ {
+ n_left = n_packets;
+ while (n_left > 0)
+ {
+ u32 bi0 = from[0];
+ vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
+ if (dm->pcap_sw_if_index == 0 ||
+ dm->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_TX])
+ pcap_add_buffer (&dm->pcap_main, vm, bi0, 512);
+ from++;
+ n_left--;
+ }
+ }
+
+ from = vlib_frame_vector_args (f);
+ n_left = n_packets;
+ i = ring->tx_head % nb_tx_desc;
+
+ while (n_left >= 8)
+ {
+ u32 bi0, bi1, bi2, bi3;
+ struct rte_mbuf *mb0, *mb1, *mb2, *mb3;
+ vlib_buffer_t *b0, *b1, *b2, *b3;
+ u32 or_flags;
+
+ dpdk_prefetch_buffer_by_index (vm, from[4]);
+ dpdk_prefetch_buffer_by_index (vm, from[5]);
+ dpdk_prefetch_buffer_by_index (vm, from[6]);
+ dpdk_prefetch_buffer_by_index (vm, from[7]);
+
+ bi0 = from[0];
+ bi1 = from[1];
+ bi2 = from[2];
+ bi3 = from[3];
+ from += 4;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+ b2 = vlib_get_buffer (vm, bi2);
+ b3 = vlib_get_buffer (vm, bi3);
+
+ or_flags = b0->flags | b1->flags | b2->flags | b3->flags;
+
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b1);
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b2);
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b3);
+
+ if (or_flags & VLIB_BUFFER_NEXT_PRESENT)
+ {
+ dpdk_validate_rte_mbuf (vm, b0, 1);
+ dpdk_validate_rte_mbuf (vm, b1, 1);
+ dpdk_validate_rte_mbuf (vm, b2, 1);
+ dpdk_validate_rte_mbuf (vm, b3, 1);
+ }
+ else
+ {
+ dpdk_validate_rte_mbuf (vm, b0, 0);
+ dpdk_validate_rte_mbuf (vm, b1, 0);
+ dpdk_validate_rte_mbuf (vm, b2, 0);
+ dpdk_validate_rte_mbuf (vm, b3, 0);
+ }
+
+ mb0 = rte_mbuf_from_vlib_buffer (b0);
+ mb1 = rte_mbuf_from_vlib_buffer (b1);
+ mb2 = rte_mbuf_from_vlib_buffer (b2);
+ mb3 = rte_mbuf_from_vlib_buffer (b3);
+
+ if (PREDICT_FALSE ((xd->flags & DPDK_DEVICE_FLAG_TX_OFFLOAD) &&
+ (or_flags &
+ (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM
+ | VNET_BUFFER_F_OFFLOAD_IP_CKSUM
+ | VNET_BUFFER_F_OFFLOAD_UDP_CKSUM))))
+ {
+ dpdk_buffer_tx_offload (xd, b0, mb0);
+ dpdk_buffer_tx_offload (xd, b1, mb1);
+ dpdk_buffer_tx_offload (xd, b2, mb2);
+ dpdk_buffer_tx_offload (xd, b3, mb3);
+ }
+
+ if (PREDICT_FALSE (or_flags & VLIB_BUFFER_RECYCLE))
+ {
+ dpdk_buffer_recycle (vm, node, b0, bi0, &mb0);
+ dpdk_buffer_recycle (vm, node, b1, bi1, &mb1);
+ dpdk_buffer_recycle (vm, node, b2, bi2, &mb2);
+ dpdk_buffer_recycle (vm, node, b3, bi3, &mb3);
+
+ /* dont enqueue packets if replication failed as they must
+ be sent back to recycle */
+ if (PREDICT_TRUE ((b0->flags & VLIB_BUFFER_REPL_FAIL) == 0))
+ tx_vector[i++ % nb_tx_desc] = mb0;
+ if (PREDICT_TRUE ((b1->flags & VLIB_BUFFER_REPL_FAIL) == 0))
+ tx_vector[i++ % nb_tx_desc] = mb1;
+ if (PREDICT_TRUE ((b2->flags & VLIB_BUFFER_REPL_FAIL) == 0))
+ tx_vector[i++ % nb_tx_desc] = mb2;
+ if (PREDICT_TRUE ((b3->flags & VLIB_BUFFER_REPL_FAIL) == 0))
+ tx_vector[i++ % nb_tx_desc] = mb3;
+ }
+ else
+ {
+ if (PREDICT_FALSE (i + 3 >= nb_tx_desc))
+ {
+ tx_vector[i++ % nb_tx_desc] = mb0;
+ tx_vector[i++ % nb_tx_desc] = mb1;
+ tx_vector[i++ % nb_tx_desc] = mb2;
+ tx_vector[i++ % nb_tx_desc] = mb3;
+ i %= nb_tx_desc;
+ }
+ else
+ {
+ tx_vector[i++] = mb0;
+ tx_vector[i++] = mb1;
+ tx_vector[i++] = mb2;
+ tx_vector[i++] = mb3;
+ }
+ }
+
+
+ if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
+ {
+ if (b0->flags & VLIB_BUFFER_IS_TRACED)
+ dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi0, b0);
+ if (b1->flags & VLIB_BUFFER_IS_TRACED)
+ dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi1, b1);
+ if (b2->flags & VLIB_BUFFER_IS_TRACED)
+ dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi2, b2);
+ if (b3->flags & VLIB_BUFFER_IS_TRACED)
+ dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi3, b3);
+ }
+
+ n_left -= 4;
+ }
+ while (n_left > 0)
+ {
+ u32 bi0;
+ struct rte_mbuf *mb0;
+ vlib_buffer_t *b0;
+
+ bi0 = from[0];
+ from++;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ VLIB_BUFFER_TRACE_TRAJECTORY_INIT (b0);
+
+ dpdk_validate_rte_mbuf (vm, b0, 1);
+
+ mb0 = rte_mbuf_from_vlib_buffer (b0);
+ dpdk_buffer_tx_offload (xd, b0, mb0);
+ dpdk_buffer_recycle (vm, node, b0, bi0, &mb0);
+
+ if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
+ if (b0->flags & VLIB_BUFFER_IS_TRACED)
+ dpdk_tx_trace_buffer (dm, node, xd, queue_id, bi0, b0);
+
+ if (PREDICT_TRUE ((b0->flags & VLIB_BUFFER_REPL_FAIL) == 0))
+ {
+ tx_vector[i % nb_tx_desc] = mb0;
+ i++;
+ }
+ n_left--;
+ }
+
+ /* account for additional packets in the ring */
+ ring->tx_head += n_packets;
+ n_on_ring = ring->tx_head - ring->tx_tail;
+
+ /* transmit as many packets as possible */
+ n_packets = tx_burst_vector_internal (vm, xd, tx_vector);
+
+ /*
+ * tx_pkts is the number of packets successfully transmitted
+ * This is the number originally on ring minus the number remaining on ring
+ */
+ tx_pkts = n_on_ring - n_packets;
+
+ {
+ /* If there is no callback then drop any non-transmitted packets */
+ if (PREDICT_FALSE (n_packets))
+ {
+ vlib_simple_counter_main_t *cm;
+ vnet_main_t *vnm = vnet_get_main ();
+
+ cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
+ VNET_INTERFACE_COUNTER_TX_ERROR);
+
+ vlib_increment_simple_counter (cm, my_cpu, xd->vlib_sw_if_index,
+ n_packets);
+
+ vlib_error_count (vm, node->node_index, DPDK_TX_FUNC_ERROR_PKT_DROP,
+ n_packets);
+
+ while (n_packets--)
+ rte_pktmbuf_free (tx_vector[ring->tx_tail + n_packets]);
+ }
+
+ /* Reset head/tail to avoid unnecessary wrap */
+ ring->tx_head = 0;
+ ring->tx_tail = 0;
+ }
+
+ /* Recycle replicated buffers */
+ if (PREDICT_FALSE (vec_len (dm->recycle[my_cpu])))
+ {
+ vlib_buffer_free (vm, dm->recycle[my_cpu],
+ vec_len (dm->recycle[my_cpu]));
+ _vec_len (dm->recycle[my_cpu]) = 0;
+ }
+
+ ASSERT (ring->tx_head >= ring->tx_tail);
+
+ return tx_pkts;
+}
+
+static void
+dpdk_clear_hw_interface_counters (u32 instance)
+{
+ dpdk_main_t *dm = &dpdk_main;
+ dpdk_device_t *xd = vec_elt_at_index (dm->devices, instance);
+
+ /*
+ * Set the "last_cleared_stats" to the current stats, so that
+ * things appear to clear from a display perspective.
+ */
+ dpdk_update_counters (xd, vlib_time_now (dm->vlib_main));
+
+ clib_memcpy (&xd->last_cleared_stats, &xd->stats, sizeof (xd->stats));
+ clib_memcpy (xd->last_cleared_xstats, xd->xstats,
+ vec_len (xd->last_cleared_xstats) *
+ sizeof (xd->last_cleared_xstats[0]));
+
+}
+
+static clib_error_t *
+dpdk_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
+{
+ vnet_hw_interface_t *hif = vnet_get_hw_interface (vnm, hw_if_index);
+ uword is_up = (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) != 0;
+ dpdk_main_t *dm = &dpdk_main;
+ dpdk_device_t *xd = vec_elt_at_index (dm->devices, hif->dev_instance);
+
+ if (xd->flags & DPDK_DEVICE_FLAG_PMD_INIT_FAIL)
+ return clib_error_return (0, "Interface not initialized");
+
+ if (is_up)
+ {
+ vnet_hw_interface_set_flags (vnm, xd->hw_if_index,
+ VNET_HW_INTERFACE_FLAG_LINK_UP);
+ if ((xd->flags & DPDK_DEVICE_FLAG_ADMIN_UP) == 0)
+ dpdk_device_start (xd);
+ xd->flags |= DPDK_DEVICE_FLAG_ADMIN_UP;
+ f64 now = vlib_time_now (dm->vlib_main);
+ dpdk_update_counters (xd, now);
+ dpdk_update_link_state (xd, now);
+ }
+ else
+ {
+ vnet_hw_interface_set_flags (vnm, xd->hw_if_index, 0);
+ if ((xd->flags & DPDK_DEVICE_FLAG_ADMIN_UP) != 0)
+ dpdk_device_stop (xd);
+ xd->flags &= ~DPDK_DEVICE_FLAG_ADMIN_UP;
+ }
+
+ return /* no error */ 0;
+}
+
+/*
+ * Dynamically redirect all pkts from a specific interface
+ * to the specified node
+ */
+static void
+dpdk_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
+ u32 node_index)
+{
+ dpdk_main_t *xm = &dpdk_main;
+ vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
+ dpdk_device_t *xd = vec_elt_at_index (xm->devices, hw->dev_instance);
+
+ /* Shut off redirection */
+ if (node_index == ~0)
+ {
+ xd->per_interface_next_index = node_index;
+ return;
+ }
+
+ xd->per_interface_next_index =
+ vlib_node_add_next (xm->vlib_main, dpdk_input_node.index, node_index);
+}
+
+
+static clib_error_t *
+dpdk_subif_add_del_function (vnet_main_t * vnm,
+ u32 hw_if_index,
+ struct vnet_sw_interface_t *st, int is_add)
+{
+ dpdk_main_t *xm = &dpdk_main;
+ vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
+ dpdk_device_t *xd = vec_elt_at_index (xm->devices, hw->dev_instance);
+ vnet_sw_interface_t *t = (vnet_sw_interface_t *) st;
+ int r, vlan_offload;
+ u32 prev_subifs = xd->num_subifs;
+ clib_error_t *err = 0;
+
+ if (is_add)
+ xd->num_subifs++;
+ else if (xd->num_subifs)
+ xd->num_subifs--;
+
+ if ((xd->flags & DPDK_DEVICE_FLAG_PMD) == 0)
+ goto done;
+
+ /* currently we program VLANS only for IXGBE VF and I40E VF */
+ if ((xd->pmd != VNET_DPDK_PMD_IXGBEVF) && (xd->pmd != VNET_DPDK_PMD_I40EVF))
+ goto done;
+
+ if (t->sub.eth.flags.no_tags == 1)
+ goto done;
+
+ if ((t->sub.eth.flags.one_tag != 1) || (t->sub.eth.flags.exact_match != 1))
+ {
+ xd->num_subifs = prev_subifs;
+ err = clib_error_return (0, "unsupported VLAN setup");
+ goto done;
+ }
+
+ vlan_offload = rte_eth_dev_get_vlan_offload (xd->device_index);
+ vlan_offload |= ETH_VLAN_FILTER_OFFLOAD;
+
+ if ((r = rte_eth_dev_set_vlan_offload (xd->device_index, vlan_offload)))
+ {
+ xd->num_subifs = prev_subifs;
+ err = clib_error_return (0, "rte_eth_dev_set_vlan_offload[%d]: err %d",
+ xd->device_index, r);
+ goto done;
+ }
+
+
+ if ((r =
+ rte_eth_dev_vlan_filter (xd->device_index, t->sub.eth.outer_vlan_id,
+ is_add)))
+ {
+ xd->num_subifs = prev_subifs;
+ err = clib_error_return (0, "rte_eth_dev_vlan_filter[%d]: err %d",
+ xd->device_index, r);
+ goto done;
+ }
+
+done:
+ if (xd->num_subifs)
+ xd->flags |= DPDK_DEVICE_FLAG_HAVE_SUBIF;
+ else
+ xd->flags &= ~DPDK_DEVICE_FLAG_HAVE_SUBIF;
+
+ return err;
+}
+
+/* *INDENT-OFF* */
+VNET_DEVICE_CLASS (dpdk_device_class) = {
+ .name = "dpdk",
+ .tx_function = dpdk_interface_tx,
+ .tx_function_n_errors = DPDK_TX_FUNC_N_ERROR,
+ .tx_function_error_strings = dpdk_tx_func_error_strings,
+ .format_device_name = format_dpdk_device_name,
+ .format_device = format_dpdk_device,
+ .format_tx_trace = format_dpdk_tx_dma_trace,
+ .clear_counters = dpdk_clear_hw_interface_counters,
+ .admin_up_down_function = dpdk_interface_admin_up_down,
+ .subif_add_del_function = dpdk_subif_add_del_function,
+ .rx_redirect_to_node = dpdk_set_interface_next_node,
+ .mac_addr_change_function = dpdk_set_mac_address,
+};
+
+VLIB_DEVICE_TX_FUNCTION_MULTIARCH (dpdk_device_class, dpdk_interface_tx)
+/* *INDENT-ON* */
+
+#define UP_DOWN_FLAG_EVENT 1
+
+uword
+admin_up_down_process (vlib_main_t * vm,
+ vlib_node_runtime_t * rt, vlib_frame_t * f)
+{
+ clib_error_t *error = 0;
+ uword event_type;
+ uword *event_data = 0;
+ u32 sw_if_index;
+ u32 flags;
+
+ while (1)
+ {
+ vlib_process_wait_for_event (vm);
+
+ event_type = vlib_process_get_events (vm, &event_data);
+
+ dpdk_main.admin_up_down_in_progress = 1;
+
+ switch (event_type)
+ {
+ case UP_DOWN_FLAG_EVENT:
+ {
+ if (vec_len (event_data) == 2)
+ {
+ sw_if_index = event_data[0];
+ flags = event_data[1];
+ error =
+ vnet_sw_interface_set_flags (vnet_get_main (), sw_if_index,
+ flags);
+ clib_error_report (error);
+ }
+ }
+ break;
+ }
+
+ vec_reset_length (event_data);
+
+ dpdk_main.admin_up_down_in_progress = 0;
+
+ }
+ return 0; /* or not */
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (admin_up_down_process_node,static) = {
+ .function = admin_up_down_process,
+ .type = VLIB_NODE_TYPE_PROCESS,
+ .name = "admin-up-down-process",
+ .process_log2_n_stack_bytes = 17, // 256KB
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */