From 941005336ee8cec614a856089f3d873f7d98135c Mon Sep 17 00:00:00 2001 From: Damjan Marion Date: Fri, 6 Nov 2020 23:25:57 +0100 Subject: interface: rx queue infra rework, part one Type: improvement Change-Id: I4008cadfd5141f921afbdc09a3ebcd1dcf88eb29 Signed-off-by: Damjan Marion --- src/vnet/interface/rx_queue.c | 254 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 254 insertions(+) create mode 100644 src/vnet/interface/rx_queue.c (limited to 'src/vnet/interface/rx_queue.c') diff --git a/src/vnet/interface/rx_queue.c b/src/vnet/interface/rx_queue.c new file mode 100644 index 00000000000..c0492dd555e --- /dev/null +++ b/src/vnet/interface/rx_queue.c @@ -0,0 +1,254 @@ +/* + * Copyright (c) 2020 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 +#include +#include +#include + +VLIB_REGISTER_LOG_CLASS (if_rxq_log, static) = { + .class_name = "interface", + .subclass_name = "rx-queue", +}; + +#define log_debug(fmt, ...) vlib_log_debug (if_rxq_log.class, fmt, __VA_ARGS__) +#define log_err(fmt, ...) vlib_log_err (if_rxq_log.class, fmt, __VA_ARGS__) + +static u32 +next_thread_index (vnet_main_t *vnm, u32 thread_index) +{ + vnet_device_main_t *vdm = &vnet_device_main; + if (vdm->first_worker_thread_index == 0) + return 0; + + if (thread_index != 0 && (thread_index < vdm->first_worker_thread_index || + thread_index > vdm->last_worker_thread_index)) + { + thread_index = vdm->next_worker_thread_index++; + if (vdm->next_worker_thread_index > vdm->last_worker_thread_index) + vdm->next_worker_thread_index = vdm->first_worker_thread_index; + } + + return thread_index; +} + +static u64 +rx_queue_key (u32 hw_if_index, u32 queue_id) +{ + return ((u64) hw_if_index << 32) | queue_id; +} + +u32 +vnet_hw_if_get_rx_queue_index_by_id (vnet_main_t *vnm, u32 hw_if_index, + u32 queue_id) +{ + vnet_interface_main_t *im = &vnm->interface_main; + u64 key = rx_queue_key (hw_if_index, queue_id); + uword *p = hash_get_mem (im->rxq_index_by_hw_if_index_and_queue_id, &key); + return p ? p[0] : ~0; +} + +u32 +vnet_hw_if_register_rx_queue (vnet_main_t *vnm, u32 hw_if_index, u32 queue_id, + u32 thread_index) +{ + vnet_interface_main_t *im = &vnm->interface_main; + vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index); + vnet_hw_if_rx_queue_t *rxq; + u64 key = rx_queue_key (hw_if_index, queue_id); + u32 queue_index; + + if (hash_get_mem (im->rxq_index_by_hw_if_index_and_queue_id, &key)) + clib_panic ("Trying to register already registered queue id (%u) in the " + "interface %v\n", + queue_id, hi->name); + + thread_index = next_thread_index (vnm, thread_index); + + pool_get_zero (im->hw_if_rx_queues, rxq); + queue_index = rxq - im->hw_if_rx_queues; + vec_add1 (hi->rx_queue_indices, queue_index); + hash_set_mem_alloc (&im->rxq_index_by_hw_if_index_and_queue_id, &key, + queue_index); + rxq->hw_if_index = hw_if_index; + rxq->dev_instance = hi->dev_instance; + rxq->queue_id = queue_id; + rxq->thread_index = thread_index; + rxq->mode = VNET_HW_IF_RX_MODE_POLLING; + rxq->file_index = ~0; + + log_debug ("register: interface %s queue-id %u thread %u", hi->name, + queue_id, thread_index); + + return queue_index; +} + +void +vnet_hw_if_unregister_rx_queue (vnet_main_t *vnm, u32 queue_index) +{ + vnet_interface_main_t *im = &vnm->interface_main; + vnet_hw_if_rx_queue_t *rxq; + rxq = vnet_hw_if_get_rx_queue (vnm, queue_index); + vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, rxq->hw_if_index); + u64 key; + + key = ((u64) rxq->hw_if_index << 32) | rxq->queue_id; + hash_unset_mem_free (&im->rxq_index_by_hw_if_index_and_queue_id, &key); + + for (int i = 0; i < vec_len (hi->rx_queue_indices); i++) + if (hi->rx_queue_indices[i] == queue_index) + { + vec_del1 (hi->rx_queue_indices, i); + break; + } + + log_debug ("unregister: interface %s queue-id %u", hi->name, rxq->queue_id); + pool_put_index (im->hw_if_rx_queues, queue_index); +} + +void +vnet_hw_if_unregister_all_rx_queues (vnet_main_t *vnm, u32 hw_if_index) +{ + vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index); + + log_debug ("unregister_all: interface %s", hi->name); + + for (int i = 0; i < vec_len (hi->rx_queue_indices); i++) + vnet_hw_if_unregister_rx_queue (vnm, hi->rx_queue_indices[i]); + + vec_free (hi->rx_queue_indices); +} + +void +vnet_hw_if_set_rx_queue_file_index (vnet_main_t *vnm, u32 queue_index, + u32 file_index) +{ + vnet_hw_if_rx_queue_t *rxq = vnet_hw_if_get_rx_queue (vnm, queue_index); + vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, rxq->hw_if_index); + + rxq->file_index = file_index; + clib_file_set_polling_thread (&file_main, file_index, rxq->thread_index); + log_debug ("set_file_index: interface %s queue-id %u file-index %u", + hi->name, rxq->queue_id, file_index); +} + +void +vnet_hw_if_set_input_node (vnet_main_t *vnm, u32 hw_if_index, u32 node_index) +{ + vlib_main_t *vm = vlib_get_main (); + vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index); + hi->input_node_index = node_index; + log_debug ("set_input_node: node %U for interface %s", format_vlib_node_name, + vm, node_index, hi->name); +} + +int +vnet_hw_if_set_rx_queue_mode (vnet_main_t *vnm, u32 queue_index, + vnet_hw_if_rx_mode mode) +{ + vnet_hw_if_rx_queue_t *rxq = vnet_hw_if_get_rx_queue (vnm, queue_index); + vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, rxq->hw_if_index); + vnet_device_class_t *dc = vnet_get_device_class (vnm, hi->dev_class_index); + + ASSERT (mode != VNET_HW_IF_RX_MODE_UNKNOWN); + + if (mode == VNET_HW_IF_RX_MODE_DEFAULT) + mode = hi->default_rx_mode; + + if (rxq->mode == mode) + { + log_debug ("set_rx_queue_mode: interface %s queue-id %u mode " + "unchanged (%U)", + hi->name, rxq->queue_id, format_vnet_hw_if_rx_mode, mode); + return 0; + } + + if (dc->rx_mode_change_function) + { + clib_error_t *err = dc->rx_mode_change_function (vnm, rxq->hw_if_index, + rxq->queue_id, mode); + if (err) + { + log_err ("setting rx mode on the interface %s queue-id %u failed.\n" + " %U", + hi->name, rxq->queue_id, format_clib_error, err); + clib_error_free (err); + return VNET_API_ERROR_UNSUPPORTED; + } + } + + rxq->mode = mode; + log_debug ("set_rx_queue_mode: interface %s queue-id %u mode set to %U", + hi->name, rxq->queue_id, format_vnet_hw_if_rx_mode, mode); + return 0; +} + +vnet_hw_if_rx_mode +vnet_hw_if_get_rx_queue_mode (vnet_main_t *vnm, u32 queue_index) +{ + vnet_hw_if_rx_queue_t *rxq = vnet_hw_if_get_rx_queue (vnm, queue_index); + return rxq->mode; +} + +void +vnet_hw_if_set_rx_queue_thread_index (vnet_main_t *vnm, u32 queue_index, + u32 thread_index) +{ + vnet_hw_if_rx_queue_t *rxq = vnet_hw_if_get_rx_queue (vnm, queue_index); + vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, rxq->hw_if_index); + + rxq->thread_index = thread_index; + + if (rxq->file_index != ~0) + clib_file_set_polling_thread (&file_main, rxq->file_index, thread_index); + + log_debug ("set_rx_queue_thread_index: interface %s queue-id %u " + "thread-index set to %u", + hi->name, rxq->queue_id, thread_index); +} + +void +vnet_hw_if_generate_rxq_int_poll_vector (vlib_main_t *vm, + vlib_node_runtime_t *node) +{ + vnet_hw_if_rx_node_runtime_t *rt = (void *) node->runtime_data; + vnet_main_t *vnm = vnet_get_main (); + int int_num = -1; + + ASSERT (node->state == VLIB_NODE_STATE_INTERRUPT); + + vec_reset_length (rt->rxq_poll_vector); + + while ((int_num = clib_interrupt_get_next (rt->rxq_interrupts, int_num)) != + -1) + { + vnet_hw_if_rx_queue_t *rxq = vnet_hw_if_get_rx_queue (vnm, int_num); + vnet_hw_if_rxq_poll_vector_t *pv; + + clib_interrupt_clear (rt->rxq_interrupts, int_num); + + vec_add2 (rt->rxq_poll_vector, pv, 1); + pv->dev_instance = rxq->dev_instance; + pv->queue_id = rxq->queue_id; + } +} + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ -- cgit 1.2.3-korg