diff options
Diffstat (limited to 'vnet/vnet/devices/ssvm/ssvm_eth.c')
| -rw-r--r-- | vnet/vnet/devices/ssvm/ssvm_eth.c | 491 |
1 files changed, 0 insertions, 491 deletions
diff --git a/vnet/vnet/devices/ssvm/ssvm_eth.c b/vnet/vnet/devices/ssvm/ssvm_eth.c deleted file mode 100644 index db4fafa9a14..00000000000 --- a/vnet/vnet/devices/ssvm/ssvm_eth.c +++ /dev/null @@ -1,491 +0,0 @@ -/* - * 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" - -ssvm_eth_main_t ssvm_eth_main; - -#define foreach_ssvm_eth_tx_func_error \ -_(RING_FULL, "Tx packet drops (ring full)") \ -_(NO_BUFFERS, "Tx packet drops (no buffers)") \ -_(ADMIN_DOWN, "Tx packet drops (admin down)") - -typedef enum -{ -#define _(f,s) SSVM_ETH_TX_ERROR_##f, - foreach_ssvm_eth_tx_func_error -#undef _ - SSVM_ETH_TX_N_ERROR, -} ssvm_eth_tx_func_error_t; - -static u32 ssvm_eth_flag_change (vnet_main_t * vnm, - vnet_hw_interface_t * hi, u32 flags); - -int -ssvm_eth_create (ssvm_eth_main_t * em, u8 * name, int is_master) -{ - ssvm_private_t *intfc; - void *oldheap; - clib_error_t *e; - unix_shared_memory_queue_t *q; - ssvm_shared_header_t *sh; - ssvm_eth_queue_elt_t *elts; - u32 *elt_indices; - u8 enet_addr[6]; - int i, rv; - - vec_add2 (em->intfcs, intfc, 1); - - intfc->ssvm_size = em->segment_size; - intfc->i_am_master = 1; - intfc->name = name; - intfc->my_pid = getpid (); - if (is_master == 0) - { - rv = ssvm_slave_init (intfc, 20 /* timeout in seconds */ ); - if (rv < 0) - return rv; - goto create_vnet_interface; - } - - intfc->requested_va = em->next_base_va; - em->next_base_va += em->segment_size; - rv = ssvm_master_init (intfc, intfc - em->intfcs /* master index */ ); - - if (rv < 0) - return rv; - - /* OK, segment created, set up queues and so forth. */ - - sh = intfc->sh; - oldheap = ssvm_push_heap (sh); - - q = unix_shared_memory_queue_init (em->queue_elts, sizeof (u32), - 0 /* consumer pid not interesting */ , - 0 /* signal not sent */ ); - sh->opaque[TO_MASTER_Q_INDEX] = (void *) q; - q = unix_shared_memory_queue_init (em->queue_elts, sizeof (u32), - 0 /* consumer pid not interesting */ , - 0 /* signal not sent */ ); - sh->opaque[TO_SLAVE_Q_INDEX] = (void *) q; - - /* - * Preallocate the requested number of buffer chunks - * There must be a better way to do this, etc. - * Add some slop to avoid pool reallocation, which will not go well - */ - elts = 0; - elt_indices = 0; - - vec_validate_aligned (elts, em->nbuffers - 1, CLIB_CACHE_LINE_BYTES); - vec_validate_aligned (elt_indices, em->nbuffers - 1, CLIB_CACHE_LINE_BYTES); - - for (i = 0; i < em->nbuffers; i++) - elt_indices[i] = i; - - sh->opaque[CHUNK_POOL_INDEX] = (void *) elts; - sh->opaque[CHUNK_POOL_FREELIST_INDEX] = (void *) elt_indices; - sh->opaque[CHUNK_POOL_NFREE] = (void *) (uword) em->nbuffers; - - ssvm_pop_heap (oldheap); - -create_vnet_interface: - - sh = intfc->sh; - - memset (enet_addr, 0, sizeof (enet_addr)); - enet_addr[0] = 2; - enet_addr[1] = 0xFE; - enet_addr[2] = is_master; - enet_addr[5] = sh->master_index; - - e = ethernet_register_interface - (em->vnet_main, ssvm_eth_device_class.index, intfc - em->intfcs, - /* ethernet address */ enet_addr, - &intfc->vlib_hw_if_index, ssvm_eth_flag_change); - - if (e) - { - clib_error_report (e); - /* $$$$ unmap offending region? */ - return VNET_API_ERROR_INVALID_INTERFACE; - } - - /* Declare link up */ - vnet_hw_interface_set_flags (em->vnet_main, intfc->vlib_hw_if_index, - VNET_HW_INTERFACE_FLAG_LINK_UP); - - /* Let the games begin... */ - if (is_master) - sh->ready = 1; - return 0; -} - -static clib_error_t * -ssvm_config (vlib_main_t * vm, unformat_input_t * input) -{ - u8 *name; - int is_master = 1; - int i, rv; - ssvm_eth_main_t *em = &ssvm_eth_main; - - while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) - { - if (unformat (input, "base-va %llx", &em->next_base_va)) - ; - else if (unformat (input, "segment-size %lld", &em->segment_size)) - em->segment_size = 1ULL << (max_log2 (em->segment_size)); - else if (unformat (input, "nbuffers %lld", &em->nbuffers)) - ; - else if (unformat (input, "queue-elts %lld", &em->queue_elts)) - ; - else if (unformat (input, "slave")) - is_master = 0; - else if (unformat (input, "%s", &name)) - vec_add1 (em->names, name); - else - break; - } - - /* No configured instances, we're done... */ - if (vec_len (em->names) == 0) - return 0; - - for (i = 0; i < vec_len (em->names); i++) - { - rv = ssvm_eth_create (em, em->names[i], is_master); - if (rv < 0) - return clib_error_return (0, "ssvm_eth_create '%s' failed, error %d", - em->names[i], rv); - } - - vlib_node_set_state (vm, ssvm_eth_input_node.index, - VLIB_NODE_STATE_POLLING); - - return 0; -} - -VLIB_CONFIG_FUNCTION (ssvm_config, "ssvm_eth"); - - -static clib_error_t * -ssvm_eth_init (vlib_main_t * vm) -{ - ssvm_eth_main_t *em = &ssvm_eth_main; - - if (((sizeof (ssvm_eth_queue_elt_t) / CLIB_CACHE_LINE_BYTES) - * CLIB_CACHE_LINE_BYTES) != sizeof (ssvm_eth_queue_elt_t)) - clib_warning ("ssvm_eth_queue_elt_t size %d not a multiple of %d", - sizeof (ssvm_eth_queue_elt_t), CLIB_CACHE_LINE_BYTES); - - em->vlib_main = vm; - em->vnet_main = vnet_get_main (); - em->elog_main = &vm->elog_main; - - /* default config param values... */ - - em->next_base_va = 0x600000000ULL; - /* - * Allocate 2 full superframes in each dir (256 x 2 x 2 x 2048 bytes), - * 2mb; double that so we have plenty of space... 4mb - */ - em->segment_size = 8 << 20; - em->nbuffers = 1024; - em->queue_elts = 512; - return 0; -} - -VLIB_INIT_FUNCTION (ssvm_eth_init); - -static char *ssvm_eth_tx_func_error_strings[] = { -#define _(n,s) s, - foreach_ssvm_eth_tx_func_error -#undef _ -}; - -static u8 * -format_ssvm_eth_device_name (u8 * s, va_list * args) -{ - u32 i = va_arg (*args, u32); - - s = format (s, "ssvmEthernet%d", i); - return s; -} - -static u8 * -format_ssvm_eth_device (u8 * s, va_list * args) -{ - s = format (s, "SSVM Ethernet"); - return s; -} - -static u8 * -format_ssvm_eth_tx_trace (u8 * s, va_list * args) -{ - s = format (s, "Unimplemented..."); - return s; -} - - -static uword -ssvm_eth_interface_tx (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * f) -{ - ssvm_eth_main_t *em = &ssvm_eth_main; - vnet_interface_output_runtime_t *rd = (void *) node->runtime_data; - ssvm_private_t *intfc = vec_elt_at_index (em->intfcs, rd->dev_instance); - ssvm_shared_header_t *sh = intfc->sh; - unix_shared_memory_queue_t *q; - u32 *from; - u32 n_left; - ssvm_eth_queue_elt_t *elts, *elt, *prev_elt; - u32 my_pid = intfc->my_pid; - vlib_buffer_t *b0; - u32 bi0; - u32 size_this_buffer; - u32 chunks_this_buffer; - u8 i_am_master = intfc->i_am_master; - u32 elt_index; - int is_ring_full, interface_down; - int i; - volatile u32 *queue_lock; - u32 n_to_alloc = VLIB_FRAME_SIZE; - u32 n_allocated, n_present_in_cache, n_available; - u32 *elt_indices; - - if (i_am_master) - q = (unix_shared_memory_queue_t *) sh->opaque[TO_SLAVE_Q_INDEX]; - else - q = (unix_shared_memory_queue_t *) sh->opaque[TO_MASTER_Q_INDEX]; - - queue_lock = (u32 *) q; - - from = vlib_frame_vector_args (f); - n_left = f->n_vectors; - is_ring_full = 0; - interface_down = 0; - - n_present_in_cache = vec_len (em->chunk_cache); - - /* admin / link up/down check */ - if (sh->opaque[MASTER_ADMIN_STATE_INDEX] == 0 || - sh->opaque[SLAVE_ADMIN_STATE_INDEX] == 0) - { - interface_down = 1; - goto out; - } - - ssvm_lock (sh, my_pid, 1); - - elts = (ssvm_eth_queue_elt_t *) (sh->opaque[CHUNK_POOL_INDEX]); - elt_indices = (u32 *) (sh->opaque[CHUNK_POOL_FREELIST_INDEX]); - n_available = (u32) pointer_to_uword (sh->opaque[CHUNK_POOL_NFREE]); - - if (n_present_in_cache < n_left * 2) - { - vec_validate (em->chunk_cache, n_to_alloc + n_present_in_cache - 1); - - n_allocated = n_to_alloc < n_available ? n_to_alloc : n_available; - - if (PREDICT_TRUE (n_allocated > 0)) - { - clib_memcpy (&em->chunk_cache[n_present_in_cache], - &elt_indices[n_available - n_allocated], - sizeof (u32) * n_allocated); - } - - n_present_in_cache += n_allocated; - n_available -= n_allocated; - sh->opaque[CHUNK_POOL_NFREE] = uword_to_pointer (n_available, void *); - _vec_len (em->chunk_cache) = n_present_in_cache; - } - - ssvm_unlock (sh); - - while (n_left) - { - bi0 = from[0]; - b0 = vlib_get_buffer (vm, bi0); - - size_this_buffer = vlib_buffer_length_in_chain (vm, b0); - chunks_this_buffer = (size_this_buffer + (SSVM_BUFFER_SIZE - 1)) - / SSVM_BUFFER_SIZE; - - /* If we're not going to be able to enqueue the buffer, tail drop. */ - if (q->cursize >= q->maxsize) - { - is_ring_full = 1; - break; - } - - prev_elt = 0; - elt_index = ~0; - for (i = 0; i < chunks_this_buffer; i++) - { - if (PREDICT_FALSE (n_present_in_cache == 0)) - goto out; - - elt_index = em->chunk_cache[--n_present_in_cache]; - elt = elts + elt_index; - - elt->type = SSVM_PACKET_TYPE; - elt->flags = 0; - elt->total_length_not_including_first_buffer = - b0->total_length_not_including_first_buffer; - elt->length_this_buffer = b0->current_length; - elt->current_data_hint = b0->current_data; - elt->owner = !i_am_master; - elt->tag = 1; - - clib_memcpy (elt->data, b0->data + b0->current_data, - b0->current_length); - - if (PREDICT_FALSE (prev_elt != 0)) - prev_elt->next_index = elt - elts; - - if (PREDICT_FALSE (i < (chunks_this_buffer - 1))) - { - elt->flags = SSVM_BUFFER_NEXT_PRESENT; - ASSERT (b0->flags & VLIB_BUFFER_NEXT_PRESENT); - b0 = vlib_get_buffer (vm, b0->next_buffer); - } - prev_elt = elt; - } - - while (__sync_lock_test_and_set (queue_lock, 1)) - ; - - unix_shared_memory_queue_add_raw (q, (u8 *) & elt_index); - CLIB_MEMORY_BARRIER (); - *queue_lock = 0; - - from++; - n_left--; - } - -out: - if (PREDICT_FALSE (n_left)) - { - if (is_ring_full) - vlib_error_count (vm, node->node_index, SSVM_ETH_TX_ERROR_RING_FULL, - n_left); - else if (interface_down) - vlib_error_count (vm, node->node_index, SSVM_ETH_TX_ERROR_ADMIN_DOWN, - n_left); - else - vlib_error_count (vm, node->node_index, SSVM_ETH_TX_ERROR_NO_BUFFERS, - n_left); - - vlib_buffer_free (vm, from, n_left); - } - else - vlib_buffer_free (vm, vlib_frame_vector_args (f), f->n_vectors); - - if (PREDICT_TRUE (vec_len (em->chunk_cache))) - _vec_len (em->chunk_cache) = n_present_in_cache; - - return f->n_vectors; -} - -static void -ssvm_eth_clear_hw_interface_counters (u32 instance) -{ - /* Nothing for now */ -} - -static clib_error_t * -ssvm_eth_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; - ssvm_eth_main_t *em = &ssvm_eth_main; - ssvm_private_t *intfc = vec_elt_at_index (em->intfcs, hif->dev_instance); - ssvm_shared_header_t *sh; - - /* publish link-state in shared-memory, to discourage buffer-wasting */ - sh = intfc->sh; - if (intfc->i_am_master) - sh->opaque[MASTER_ADMIN_STATE_INDEX] = (void *) is_up; - else - sh->opaque[SLAVE_ADMIN_STATE_INDEX] = (void *) is_up; - - return 0; -} - -static clib_error_t * -ssvm_eth_subif_add_del_function (vnet_main_t * vnm, - u32 hw_if_index, - struct vnet_sw_interface_t *st, int is_add) -{ - /* Nothing for now */ - return 0; -} - -/* - * Dynamically redirect all pkts from a specific interface - * to the specified node - */ -static void -ssvm_eth_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index, - u32 node_index) -{ - ssvm_eth_main_t *em = &ssvm_eth_main; - vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index); - ssvm_private_t *intfc = pool_elt_at_index (em->intfcs, hw->dev_instance); - - /* Shut off redirection */ - if (node_index == ~0) - { - intfc->per_interface_next_index = node_index; - return; - } - - intfc->per_interface_next_index = - vlib_node_add_next (em->vlib_main, ssvm_eth_input_node.index, node_index); -} - -static u32 -ssvm_eth_flag_change (vnet_main_t * vnm, vnet_hw_interface_t * hi, u32 flags) -{ - /* nothing for now */ - return 0; -} - -/* *INDENT-OFF* */ -VNET_DEVICE_CLASS (ssvm_eth_device_class) = { - .name = "ssvm-eth", - .tx_function = ssvm_eth_interface_tx, - .tx_function_n_errors = SSVM_ETH_TX_N_ERROR, - .tx_function_error_strings = ssvm_eth_tx_func_error_strings, - .format_device_name = format_ssvm_eth_device_name, - .format_device = format_ssvm_eth_device, - .format_tx_trace = format_ssvm_eth_tx_trace, - .clear_counters = ssvm_eth_clear_hw_interface_counters, - .admin_up_down_function = ssvm_eth_interface_admin_up_down, - .subif_add_del_function = ssvm_eth_subif_add_del_function, - .rx_redirect_to_node = ssvm_eth_set_interface_next_node, -}; - -VLIB_DEVICE_TX_FUNCTION_MULTIARCH (ssvm_eth_device_class, - ssvm_eth_interface_tx) -/* *INDENT-ON* */ - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |