diff options
Diffstat (limited to 'vpp/vnet/vnet/devices/odp/node.c')
| -rwxr-xr-x | vpp/vnet/vnet/devices/odp/node.c | 334 |
1 files changed, 334 insertions, 0 deletions
diff --git a/vpp/vnet/vnet/devices/odp/node.c b/vpp/vnet/vnet/devices/odp/node.c new file mode 100755 index 00000000..e736e5f6 --- /dev/null +++ b/vpp/vnet/vnet/devices/odp/node.c @@ -0,0 +1,334 @@ +/* + *------------------------------------------------------------------ + * Copyright (c) 2016 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 <linux/if_packet.h> +#include <vlib/vlib.h> +#include <vlib/unix/unix.h> +#include <vnet/ip/ip.h> +#include <vnet/ethernet/ethernet.h> +#include <vnet/devices/devices.h> +#include <vnet/feature/feature.h> +#include <vnet/devices/odp/odp_packet.h> + +#define foreach_odp_packet_input_error + +typedef enum +{ +#define _(f,s) ODP_PACKET_INPUT_ERROR_##f, + foreach_odp_packet_input_error +#undef _ + ODP_PACKET_INPUT_N_ERROR, +} odp_packet_input_error_t; + +static char *odp_packet_input_error_strings[] = { +#define _(n,s) s, + foreach_odp_packet_input_error +#undef _ +}; + +typedef struct +{ + u32 next_index; + u32 hw_if_index; + odp_packet_t pkt; +} odp_packet_input_trace_t; + +static u8 * +format_odp_packet_input_trace (u8 * s, va_list * args) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); + odp_packet_input_trace_t *t = va_arg (*args, odp_packet_input_trace_t *); + + s = format (s, "odp_packet: hw_if_index %d next-index %d", + t->hw_if_index, t->next_index); + + return s; +} + +always_inline void +buffer_add_to_chain (vlib_main_t * vm, u32 bi, u32 first_bi, u32 prev_bi) +{ + vlib_buffer_t *b = vlib_get_buffer (vm, bi); + vlib_buffer_t *first_b = vlib_get_buffer (vm, first_bi); + vlib_buffer_t *prev_b = vlib_get_buffer (vm, prev_bi); + + /* update first buffer */ + first_b->total_length_not_including_first_buffer += b->current_length; + + /* update previous buffer */ + prev_b->next_buffer = bi; + prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT; + + /* update current buffer */ + b->next_buffer = 0; + + +} + +always_inline int +odp_packet_queue_mode (odp_pktio_t pktio, u32 mode, odp_packet_t pkt_tbl[]) +{ + u32 num_evts = 0, num_pkts = 0, i = 0; + odp_queue_t inq; + odp_event_t evt_tbl[VLIB_FRAME_SIZE]; + u64 sched_wait = odp_schedule_wait_time(ODP_TIME_MSEC_IN_NS * 100); + + if (pktio == ODP_PKTIO_INVALID) + { + clib_warning("odp_pktio_lookup() failed"); + return -1; + } + + inq = ODP_QUEUE_INVALID; + if ((mode == APPL_MODE_PKT_QUEUE) && + (odp_pktin_event_queue(pktio, &inq, 1) != 1)) + { + clib_warning("Error:no input queue"); + return -1; + } + + if (inq != ODP_QUEUE_INVALID) + num_evts = odp_queue_deq_multi(inq, evt_tbl, VLIB_FRAME_SIZE); + else + num_evts = odp_schedule_multi(NULL, sched_wait, evt_tbl, VLIB_FRAME_SIZE); + + /* convert events to packets, discarding any non-packet events */ + for (i = 0; i < num_evts; ++i) + { + if (odp_event_type(evt_tbl[i]) == ODP_EVENT_PACKET) + pkt_tbl[num_pkts++] = odp_packet_from_event(evt_tbl[i]); + else + odp_event_free(evt_tbl[i]); + } + + return num_pkts; + +} + +always_inline int +odp_packet_burst_mode (odp_pktio_t pktio, odp_pktin_queue_t pktin, odp_packet_t pkt_tbl[]) +{ + u32 num_pkts; + + if (odp_pktin_queue(pktio, &pktin, 1) != 1) + { + clib_warning("odp_pktio_open() failed: no pktin queue"); + return -1; + } + + num_pkts = odp_pktin_recv(pktin, pkt_tbl, VLIB_FRAME_SIZE); + + return num_pkts; + +} + +always_inline uword +odp_packet_device_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame, odp_packet_if_t *oif) +{ + u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT; + uword n_trace = vlib_get_trace_count (vm, node); + odp_packet_main_t *om = &odp_packet_main; + u32 n_rx_packets = 0; + u32 n_rx_bytes = 0; + u32 *to_next = 0; + u32 n_free_bufs; + u32 cpu_index = os_get_cpu_number(); + odp_pktin_queue_t pktin = { 0 }; + odp_packet_t pkt,pkt_tbl[VLIB_FRAME_SIZE]; + u32 pkts = 0, pkts_ok = 0; + u32 n_buffer_bytes = vlib_buffer_free_list_buffer_size (vm, + VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX); + + if (oif->per_interface_next_index != ~0) + next_index = oif->per_interface_next_index; + + n_free_bufs = vec_len (om->rx_buffers[cpu_index]); + if (PREDICT_FALSE (n_free_bufs < VLIB_FRAME_SIZE)) + { + vec_validate (om->rx_buffers[cpu_index], + VLIB_FRAME_SIZE + n_free_bufs - 1); + n_free_bufs += + vlib_buffer_alloc (vm, &om->rx_buffers[cpu_index][n_free_bufs], + VLIB_FRAME_SIZE); + _vec_len (om->rx_buffers[cpu_index]) = n_free_bufs; + + } + + if ((oif->mode ==( APPL_MODE_PKT_QUEUE)) || + (oif->mode ==(APPL_MODE_PKT_SCHED))) + { + pkts = odp_packet_queue_mode(oif->pktio, oif->mode, pkt_tbl); + } + else + { + pkts = odp_packet_burst_mode(oif->pktio, pktin, pkt_tbl); + } + + if (pkts > 0) + { + u32 n_left_to_next,i = 0; + u32 next0 = next_index; + pkts_ok = drop_err_pkts(pkt_tbl, pkts); + vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); + + while((i < pkts_ok) && (n_left_to_next) && (n_free_bufs)) + { + vlib_buffer_t *first_b0 = 0; + u32 offset = 0; + u32 bi0 = 0, first_bi0 = 0, prev_bi0; + uint8_t *data_buf; + pkt = pkt_tbl[i]; + u32 data_len = odp_packet_len(pkt); + data_buf = malloc(data_len); + memset(data_buf, 0, data_len); + odp_packet_copy_to_mem(pkt, 0, data_len, data_buf); + + while (data_len && n_free_bufs) + { + vlib_buffer_t *b0; + /* grab free buffer */ + u32 last_empty_buffer = + vec_len (om->rx_buffers[cpu_index]) - 1; + prev_bi0 = bi0; + bi0 = om->rx_buffers[cpu_index][last_empty_buffer]; + b0 = vlib_get_buffer (vm, bi0); + _vec_len (om->rx_buffers[cpu_index]) = last_empty_buffer; + n_free_bufs--; + /* copy data */ + u32 bytes_to_copy = + data_len > n_buffer_bytes ? n_buffer_bytes : data_len; + b0->current_data = 0; + clib_memcpy (vlib_buffer_get_current (b0), + (u8 *) data_buf + offset, + bytes_to_copy); + + /* fill buffer header */ + b0->current_length = bytes_to_copy; + + if (offset == 0) + { + b0->total_length_not_including_first_buffer = 0; + b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID; + vnet_buffer (b0)->sw_if_index[VLIB_RX] = + oif->sw_if_index; + vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0; + first_bi0 = bi0; + first_b0 = vlib_get_buffer (vm, first_bi0); + } + else + { + buffer_add_to_chain (vm, bi0, first_bi0, prev_bi0); + } + + offset += bytes_to_copy; + data_len -= bytes_to_copy; + } + /* trace */ + VLIB_BUFFER_TRACE_TRAJECTORY_INIT (first_b0); + if (PREDICT_FALSE (n_trace > 0)) + { + odp_packet_input_trace_t *tr; + vlib_trace_buffer (vm, node, next0, first_b0, 0); + vlib_set_trace_count (vm, node, --n_trace); + tr = vlib_add_trace (vm, node, first_b0, sizeof (*tr)); + tr->next_index = next0; + tr->hw_if_index = oif->hw_if_index; + } + + /* redirect if feature path enabled */ + vnet_feature_start_device_input_x1 (oif->sw_if_index, &next0, + first_b0, 0); + + /* enque and take next packet */ + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, + n_left_to_next, first_bi0, + next0); + + /* next packet */ + n_rx_packets++; + n_rx_bytes += odp_packet_len(pkt); + to_next[0] = first_bi0; + to_next += 1; + n_left_to_next--; + free(data_buf); + odp_packet_free(pkt_tbl[i]); + i++; + } + + 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, + os_get_cpu_number (), oif->hw_if_index, n_rx_packets, n_rx_bytes); + + return n_rx_packets; + +} + +static uword +odp_packet_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + + int i; + u32 n_rx_packets = 0; + u32 cpu_index = os_get_cpu_number (); + odp_packet_main_t *om = &odp_packet_main; + odp_packet_if_t *oif; + + for (i = 0; i < vec_len (om->interfaces); i++) + { + oif = vec_elt_at_index (om->interfaces, i); + + if (oif->is_admin_up && + (i % om->input_cpu_count) == + (cpu_index - om->input_cpu_first_index)) + { + n_rx_packets += odp_packet_device_input_fn (vm, node, frame, oif); + } + } + + return n_rx_packets; +} + +/* *INDENT-OFF* */ +VLIB_REGISTER_NODE (odp_packet_input_node) = { + .function = odp_packet_input_fn, + .name = "odp-packet-input", + .sibling_of = "device-input", + .format_trace = format_odp_packet_input_trace, + .type = VLIB_NODE_TYPE_INPUT, + .state = VLIB_NODE_STATE_DISABLED, + .n_errors = ODP_PACKET_INPUT_N_ERROR, + .error_strings = odp_packet_input_error_strings, +}; + +VLIB_NODE_FUNCTION_MULTIARCH (odp_packet_input_node, odp_packet_input_fn) +/* *INDENT-ON* */ + + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |