| /* |
| * 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; |
| unix_shared_memory_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 = (unix_shared_memory_queue_t *) (sh->opaque[TO_MASTER_Q_INDEX]); |
| else |
| q = (unix_shared_memory_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) |
| { |
| unix_shared_memory_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: |
| */ |