+++ /dev/null
-/*
- * 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 "ssvm_eth.h"
-
-vlib_node_registration_t ssvm_eth_input_node;
-
-typedef struct
-{
- u32 next_index;
- u32 sw_if_index;
-} ssvm_eth_input_trace_t;
-
-/* packet trace format function */
-static u8 *
-format_ssvm_eth_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 *);
- ssvm_eth_input_trace_t *t = va_arg (*args, ssvm_eth_input_trace_t *);
-
- s = format (s, "SSVM_ETH_INPUT: sw_if_index %d, next index %d",
- t->sw_if_index, t->next_index);
- return s;
-}
-
-vlib_node_registration_t ssvm_eth_input_node;
-
-#define foreach_ssvm_eth_input_error \
-_(NO_BUFFERS, "Rx packet drops (no buffers)")
-
-typedef enum
-{
-#define _(sym,str) SSVM_ETH_INPUT_ERROR_##sym,
- foreach_ssvm_eth_input_error
-#undef _
- SSVM_ETH_INPUT_N_ERROR,
-} ssvm_eth_input_error_t;
-
-static char *ssvm_eth_input_error_strings[] = {
-#define _(sym,string) string,
- foreach_ssvm_eth_input_error
-#undef _
-};
-
-typedef enum
-{
- SSVM_ETH_INPUT_NEXT_DROP,
- SSVM_ETH_INPUT_NEXT_ETHERNET_INPUT,
- SSVM_ETH_INPUT_NEXT_IP4_INPUT,
- SSVM_ETH_INPUT_NEXT_IP6_INPUT,
- SSVM_ETH_INPUT_NEXT_MPLS_INPUT,
- SSVM_ETH_INPUT_N_NEXT,
-} ssvm_eth_input_next_t;
-
-static inline uword
-ssvm_eth_device_input (ssvm_eth_main_t * em,
- ssvm_private_t * intfc, vlib_node_runtime_t * node)
-{
- ssvm_shared_header_t *sh = intfc->sh;
- vlib_main_t *vm = em->vlib_main;
- svm_queue_t *q;
- ssvm_eth_queue_elt_t *elt, *elts;
- u32 elt_index;
- u32 my_pid = intfc->my_pid;
- int rx_queue_index;
- u32 n_to_alloc = VLIB_FRAME_SIZE * 2;
- u32 n_allocated, n_present_in_cache;
- u32 next_index = VNET_DEVICE_INPUT_NEXT_ETHERNET_INPUT;
- vlib_buffer_free_list_t *fl;
- u32 n_left_to_next, *to_next;
- u32 next0;
- u32 n_buffers;
- u32 n_available;
- u32 bi0, saved_bi0;
- vlib_buffer_t *b0, *prev;
- u32 saved_cache_size = 0;
- ethernet_header_t *eh0;
- u16 type0;
- u32 n_rx_bytes = 0, l3_offset0;
- u32 thread_index = vlib_get_thread_index ();
- u32 trace_cnt __attribute__ ((unused)) = vlib_get_trace_count (vm, node);
- volatile u32 *lock;
- u32 *elt_indices;
- uword n_trace = vlib_get_trace_count (vm, node);
-
- /* Either side down? buh-bye... */
- if (pointer_to_uword (sh->opaque[MASTER_ADMIN_STATE_INDEX]) == 0 ||
- pointer_to_uword (sh->opaque[SLAVE_ADMIN_STATE_INDEX]) == 0)
- return 0;
-
- if (intfc->i_am_master)
- q = (svm_queue_t *) (sh->opaque[TO_MASTER_Q_INDEX]);
- else
- q = (svm_queue_t *) (sh->opaque[TO_SLAVE_Q_INDEX]);
-
- /* Nothing to do? */
- if (q->cursize == 0)
- return 0;
-
- fl = vlib_buffer_get_free_list (vm, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
-
- vec_reset_length (intfc->rx_queue);
-
- lock = (u32 *) q;
- while (__sync_lock_test_and_set (lock, 1))
- ;
- while (q->cursize > 0)
- {
- svm_queue_sub_raw (q, (u8 *) & elt_index);
- ASSERT (elt_index < 2048);
- vec_add1 (intfc->rx_queue, elt_index);
- }
- CLIB_MEMORY_BARRIER ();
- *lock = 0;
-
- n_present_in_cache = vec_len (em->buffer_cache);
-
- if (vec_len (em->buffer_cache) < vec_len (intfc->rx_queue) * 2)
- {
- vec_validate (em->buffer_cache,
- n_to_alloc + vec_len (em->buffer_cache) - 1);
- n_allocated =
- vlib_buffer_alloc (vm, &em->buffer_cache[n_present_in_cache],
- n_to_alloc);
-
- n_present_in_cache += n_allocated;
- _vec_len (em->buffer_cache) = n_present_in_cache;
- }
-
- elts = (ssvm_eth_queue_elt_t *) (sh->opaque[CHUNK_POOL_INDEX]);
-
- n_buffers = vec_len (intfc->rx_queue);
- rx_queue_index = 0;
-
- while (n_buffers > 0)
- {
- vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
-
- while (n_buffers > 0 && n_left_to_next > 0)
- {
- elt = elts + intfc->rx_queue[rx_queue_index];
-
- saved_cache_size = n_present_in_cache;
- if (PREDICT_FALSE (saved_cache_size == 0))
- {
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- goto out;
- }
- saved_bi0 = bi0 = em->buffer_cache[--n_present_in_cache];
- b0 = vlib_get_buffer (vm, bi0);
- prev = 0;
-
- while (1)
- {
- vlib_buffer_init_for_free_list (b0, fl);
-
- b0->current_data = elt->current_data_hint;
- b0->current_length = elt->length_this_buffer;
- b0->total_length_not_including_first_buffer =
- elt->total_length_not_including_first_buffer;
-
- clib_memcpy (b0->data + b0->current_data, elt->data,
- b0->current_length);
-
- if (PREDICT_FALSE (prev != 0))
- prev->next_buffer = bi0;
-
- if (PREDICT_FALSE (elt->flags & SSVM_BUFFER_NEXT_PRESENT))
- {
- prev = b0;
- if (PREDICT_FALSE (n_present_in_cache == 0))
- {
- vlib_put_next_frame (vm, node, next_index,
- n_left_to_next);
- goto out;
- }
- bi0 = em->buffer_cache[--n_present_in_cache];
- b0 = vlib_get_buffer (vm, bi0);
- }
- else
- break;
- }
-
- saved_cache_size = n_present_in_cache;
-
- to_next[0] = saved_bi0;
- to_next++;
- n_left_to_next--;
-
- b0 = vlib_get_buffer (vm, saved_bi0);
- eh0 = vlib_buffer_get_current (b0);
-
- type0 = clib_net_to_host_u16 (eh0->type);
-
- next0 = SSVM_ETH_INPUT_NEXT_ETHERNET_INPUT;
-
- if (type0 == ETHERNET_TYPE_IP4)
- next0 = SSVM_ETH_INPUT_NEXT_IP4_INPUT;
- else if (type0 == ETHERNET_TYPE_IP6)
- next0 = SSVM_ETH_INPUT_NEXT_IP6_INPUT;
- else if (type0 == ETHERNET_TYPE_MPLS)
- next0 = SSVM_ETH_INPUT_NEXT_MPLS_INPUT;
-
- l3_offset0 = ((next0 == SSVM_ETH_INPUT_NEXT_IP4_INPUT ||
- next0 == SSVM_ETH_INPUT_NEXT_IP6_INPUT ||
- next0 == SSVM_ETH_INPUT_NEXT_MPLS_INPUT) ?
- sizeof (ethernet_header_t) : 0);
-
- n_rx_bytes += b0->current_length
- + b0->total_length_not_including_first_buffer;
-
- b0->current_data += l3_offset0;
- b0->current_length -= l3_offset0;
- b0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID;
-
- vnet_buffer (b0)->sw_if_index[VLIB_RX] = intfc->vlib_hw_if_index;
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
-
- /*
- * 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 > 0))
- {
- ssvm_eth_input_trace_t *tr;
-
- vlib_trace_buffer (vm, node, next0, b0, /* follow_chain */ 1);
- vlib_set_trace_count (vm, node, --n_trace);
-
- tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
-
- tr->next_index = next0;
- tr->sw_if_index = intfc->vlib_hw_if_index;
- }
-
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- bi0, next0);
- n_buffers--;
- rx_queue_index++;
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
-out:
- if (em->buffer_cache)
- _vec_len (em->buffer_cache) = saved_cache_size;
- else
- ASSERT (saved_cache_size == 0);
-
- ssvm_lock (sh, my_pid, 2);
-
- ASSERT (vec_len (intfc->rx_queue) > 0);
-
- n_available = (u32) pointer_to_uword (sh->opaque[CHUNK_POOL_NFREE]);
- elt_indices = (u32 *) (sh->opaque[CHUNK_POOL_FREELIST_INDEX]);
-
- clib_memcpy (&elt_indices[n_available], intfc->rx_queue,
- vec_len (intfc->rx_queue) * sizeof (u32));
-
- n_available += vec_len (intfc->rx_queue);
- sh->opaque[CHUNK_POOL_NFREE] = uword_to_pointer (n_available, void *);
-
- ssvm_unlock (sh);
-
- vlib_error_count (vm, node->node_index, SSVM_ETH_INPUT_ERROR_NO_BUFFERS,
- n_buffers);
-
- vlib_increment_combined_counter
- (vnet_get_main ()->interface_main.combined_sw_if_counters
- + VNET_INTERFACE_COUNTER_RX, thread_index,
- intfc->vlib_hw_if_index, rx_queue_index, n_rx_bytes);
-
- vnet_device_increment_rx_packets (thread_index, rx_queue_index);
-
- return rx_queue_index;
-}
-
-static uword
-ssvm_eth_input_node_fn (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
- ssvm_eth_main_t *em = &ssvm_eth_main;
- ssvm_private_t *intfc;
- uword n_rx_packets = 0;
-
- vec_foreach (intfc, em->intfcs)
- {
- n_rx_packets += ssvm_eth_device_input (em, intfc, node);
- }
-
- return n_rx_packets;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (ssvm_eth_input_node) = {
- .function = ssvm_eth_input_node_fn,
- .name = "ssvm_eth_input",
- .vector_size = sizeof (u32),
- .format_trace = format_ssvm_eth_input_trace,
- .type = VLIB_NODE_TYPE_INPUT,
- .state = VLIB_NODE_STATE_DISABLED,
-
- .n_errors = ARRAY_LEN(ssvm_eth_input_error_strings),
- .error_strings = ssvm_eth_input_error_strings,
-
- .n_next_nodes = SSVM_ETH_INPUT_N_NEXT,
-
- /* edit / add dispositions here */
- .next_nodes = {
- [SSVM_ETH_INPUT_NEXT_DROP] = "error-drop",
- [SSVM_ETH_INPUT_NEXT_ETHERNET_INPUT] = "ethernet-input",
- [SSVM_ETH_INPUT_NEXT_IP4_INPUT] = "ip4-input",
- [SSVM_ETH_INPUT_NEXT_IP6_INPUT] = "ip6-input",
- [SSVM_ETH_INPUT_NEXT_MPLS_INPUT] = "mpls-input",
- },
-};
-
-VLIB_NODE_FUNCTION_MULTIARCH (ssvm_eth_input_node, ssvm_eth_input_node_fn)
-/* *INDENT-ON* */
-
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff