+++ /dev/null
-/*
- *------------------------------------------------------------------
- * 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 <stdint.h>
-#include <net/if.h>
-#include <sys/ioctl.h>
-
-#include <vlib/vlib.h>
-#include <vlib/unix/unix.h>
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/devices/devices.h>
-#include <vnet/feature/feature.h>
-
-#include <vnet/devices/netmap/net_netmap.h>
-#include <vnet/devices/netmap/netmap.h>
-
-#define foreach_netmap_input_error
-
-typedef enum
-{
-#define _(f,s) NETMAP_INPUT_ERROR_##f,
- foreach_netmap_input_error
-#undef _
- NETMAP_INPUT_N_ERROR,
-} netmap_input_error_t;
-
-static char *netmap_input_error_strings[] = {
-#define _(n,s) s,
- foreach_netmap_input_error
-#undef _
-};
-
-typedef struct
-{
- u32 next_index;
- u32 hw_if_index;
- struct netmap_slot slot;
-} netmap_input_trace_t;
-
-static u8 *
-format_netmap_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 *);
- netmap_input_trace_t *t = va_arg (*args, netmap_input_trace_t *);
- u32 indent = format_get_indent (s);
-
- s = format (s, "netmap: hw_if_index %d next-index %d",
- t->hw_if_index, t->next_index);
- s = format (s, "\n%Uslot: flags 0x%x len %u buf_idx %u",
- format_white_space, indent + 2,
- t->slot.flags, t->slot.len, t->slot.buf_idx);
- 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 uword
-netmap_device_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
- vlib_frame_t * frame, netmap_if_t * nif)
-{
- u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
- uword n_trace = vlib_get_trace_count (vm, node);
- netmap_main_t *nm = &netmap_main;
- u32 n_rx_packets = 0;
- u32 n_rx_bytes = 0;
- u32 *to_next = 0;
- u32 n_free_bufs;
- struct netmap_ring *ring;
- int cur_ring;
- u32 thread_index = vm->thread_index;
- u32 n_buffer_bytes = vlib_buffer_get_default_data_size (vm);
-
- if (nif->per_interface_next_index != ~0)
- next_index = nif->per_interface_next_index;
-
- n_free_bufs = vec_len (nm->rx_buffers[thread_index]);
- if (PREDICT_FALSE (n_free_bufs < VLIB_FRAME_SIZE))
- {
- vec_validate (nm->rx_buffers[thread_index],
- VLIB_FRAME_SIZE + n_free_bufs - 1);
- n_free_bufs +=
- vlib_buffer_alloc (vm, &nm->rx_buffers[thread_index][n_free_bufs],
- VLIB_FRAME_SIZE);
- _vec_len (nm->rx_buffers[thread_index]) = n_free_bufs;
- }
-
- cur_ring = nif->first_rx_ring;
- while (cur_ring <= nif->last_rx_ring && n_free_bufs)
- {
- int r = 0;
- u32 cur_slot_index;
- ring = NETMAP_RXRING (nif->nifp, cur_ring);
- r = nm_ring_space (ring);
-
- if (!r)
- {
- cur_ring++;
- continue;
- }
-
- if (r > n_free_bufs)
- r = n_free_bufs;
-
- cur_slot_index = ring->cur;
- while (r)
- {
- u32 n_left_to_next;
- u32 next0 = next_index;
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (r && n_left_to_next)
- {
- vlib_buffer_t *first_b0 = 0;
- u32 offset = 0;
- u32 bi0 = 0, first_bi0 = 0, prev_bi0;
- u32 next_slot_index = (cur_slot_index + 1) % ring->num_slots;
- u32 next2_slot_index = (cur_slot_index + 2) % ring->num_slots;
- struct netmap_slot *slot = &ring->slot[cur_slot_index];
- u32 data_len = slot->len;
-
- /* prefetch 2 slots in advance */
- CLIB_PREFETCH (&ring->slot[next2_slot_index],
- CLIB_CACHE_LINE_BYTES, LOAD);
- /* prefetch start of next packet */
- CLIB_PREFETCH (NETMAP_BUF
- (ring, ring->slot[next_slot_index].buf_idx),
- CLIB_CACHE_LINE_BYTES, LOAD);
-
- while (data_len && n_free_bufs)
- {
- vlib_buffer_t *b0;
- /* grab free buffer */
- u32 last_empty_buffer =
- vec_len (nm->rx_buffers[thread_index]) - 1;
- prev_bi0 = bi0;
- bi0 = nm->rx_buffers[thread_index][last_empty_buffer];
- b0 = vlib_get_buffer (vm, bi0);
- _vec_len (nm->rx_buffers[thread_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_fast (vlib_buffer_get_current (b0),
- (u8 *) NETMAP_BUF (ring, slot->buf_idx) +
- 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] =
- nif->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 */
- if (PREDICT_FALSE (n_trace > 0))
- {
- if (PREDICT_TRUE (first_b0 != 0))
- {
- netmap_input_trace_t *tr;
- vlib_trace_buffer (vm, node, next0, first_b0,
- /* follow_chain */ 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 = nif->hw_if_index;
- memcpy (&tr->slot, slot, sizeof (struct netmap_slot));
- }
- }
-
- /* redirect if feature path enabled */
- vnet_feature_start_device_input_x1 (nif->sw_if_index, &next0,
- first_b0);
-
- /* 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 += slot->len;
- to_next[0] = first_bi0;
- to_next += 1;
- n_left_to_next--;
- cur_slot_index = next_slot_index;
-
- r--;
- }
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
- ring->head = ring->cur = cur_slot_index;
- cur_ring++;
- }
-
- if (n_rx_packets)
- ioctl (nif->fd, NIOCRXSYNC, NULL);
-
- vlib_increment_combined_counter
- (vnet_get_main ()->interface_main.combined_sw_if_counters
- + VNET_INTERFACE_COUNTER_RX,
- vlib_get_thread_index (), nif->hw_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 (netmap_input_node) (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
-{
- int i;
- u32 n_rx_packets = 0;
- u32 thread_index = vm->thread_index;
- netmap_main_t *nm = &netmap_main;
- netmap_if_t *nmi;
-
- for (i = 0; i < vec_len (nm->interfaces); i++)
- {
- nmi = vec_elt_at_index (nm->interfaces, i);
- if (nmi->is_admin_up &&
- (i % nm->input_cpu_count) ==
- (thread_index - nm->input_cpu_first_index))
- n_rx_packets += netmap_device_input_fn (vm, node, frame, nmi);
- }
-
- return n_rx_packets;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (netmap_input_node) = {
- .name = "netmap-input",
- .sibling_of = "device-input",
- .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
- .format_trace = format_netmap_input_trace,
- .type = VLIB_NODE_TYPE_INPUT,
- /* default state is INTERRUPT mode, switch to POLLING if worker threads are enabled */
- .state = VLIB_NODE_STATE_INTERRUPT,
- .n_errors = NETMAP_INPUT_N_ERROR,
- .error_strings = netmap_input_error_strings,
-};
-/* *INDENT-ON* */
-
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff