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/*
* 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 <vnet/vnet.h>
#include <vnet/devices/devices.h>
#include <vnet/feature/feature.h>
#include <vnet/ip/ip.h>
#include <vnet/ethernet/ethernet.h>
vnet_device_main_t vnet_device_main;
static uword
device_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
return 0;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (device_input_node) = {
.function = device_input_fn,
.name = "device-input",
.runtime_data_bytes = sizeof (vnet_device_input_runtime_t),
.type = VLIB_NODE_TYPE_INPUT,
.state = VLIB_NODE_STATE_DISABLED,
.n_next_nodes = VNET_DEVICE_INPUT_N_NEXT_NODES,
.next_nodes = VNET_DEVICE_INPUT_NEXT_NODES,
};
/* Table defines how much we need to advance current data pointer
in the buffer if we shortcut to l3 nodes */
const u32 __attribute__((aligned (CLIB_CACHE_LINE_BYTES)))
device_input_next_node_advance[((VNET_DEVICE_INPUT_N_NEXT_NODES /
CLIB_CACHE_LINE_BYTES) +1) * CLIB_CACHE_LINE_BYTES] =
{
[VNET_DEVICE_INPUT_NEXT_IP4_INPUT] = sizeof (ethernet_header_t),
[VNET_DEVICE_INPUT_NEXT_IP4_NCS_INPUT] = sizeof (ethernet_header_t),
[VNET_DEVICE_INPUT_NEXT_IP6_INPUT] = sizeof (ethernet_header_t),
[VNET_DEVICE_INPUT_NEXT_MPLS_INPUT] = sizeof (ethernet_header_t),
};
VNET_FEATURE_ARC_INIT (device_input, static) =
{
.arc_name = "device-input",
.start_nodes = VNET_FEATURES ("device-input"),
.arc_index_ptr = &feature_main.device_input_feature_arc_index,
};
VNET_FEATURE_INIT (l2_patch, static) = {
.arc_name = "device-input",
.node_name = "l2-patch",
.runs_before = VNET_FEATURES ("ethernet-input"),
};
VNET_FEATURE_INIT (worker_handoff, static) = {
.arc_name = "device-input",
.node_name = "worker-handoff",
.runs_before = VNET_FEATURES ("ethernet-input"),
};
VNET_FEATURE_INIT (span_input, static) = {
.arc_name = "device-input",
.node_name = "span-input",
.runs_before = VNET_FEATURES ("ethernet-input"),
};
VNET_FEATURE_INIT (ethernet_input, static) = {
.arc_name = "device-input",
.node_name = "ethernet-input",
.runs_before = 0, /* not before any other features */
};
/* *INDENT-ON* */
static int
vnet_device_queue_sort (void *a1, void *a2)
{
vnet_device_and_queue_t *dq1 = a1;
vnet_device_and_queue_t *dq2 = a2;
if (dq1->dev_instance > dq2->dev_instance)
return 1;
else if (dq1->dev_instance < dq2->dev_instance)
return -1;
else if (dq1->queue_id > dq2->queue_id)
return 1;
else if (dq1->queue_id < dq2->queue_id)
return -1;
else
return 0;
}
static void
vnet_device_queue_update (vnet_main_t * vnm, vnet_device_input_runtime_t * rt)
{
vnet_device_and_queue_t *dq;
vnet_hw_interface_t *hw;
vec_sort_with_function (rt->devices_and_queues, vnet_device_queue_sort);
vec_foreach (dq, rt->devices_and_queues)
{
hw = vnet_get_hw_interface (vnm, dq->hw_if_index);
vec_validate (hw->dq_runtime_index_by_queue, dq->queue_id);
hw->dq_runtime_index_by_queue[dq->queue_id] = dq - rt->devices_and_queues;
}
}
void
vnet_device_input_assign_thread (vnet_main_t * vnm, u32 hw_if_index,
u16 queue_id, uword thread_index)
{
vnet_device_main_t *vdm = &vnet_device_main;
vlib_main_t *vm;
vnet_device_input_runtime_t *rt;
vnet_device_and_queue_t *dq;
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
ASSERT (hw->input_node_index > 0);
if (vdm->first_worker_thread_index == 0)
thread_index = 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;
}
vm = vlib_mains[thread_index];
rt = vlib_node_get_runtime_data (vm, hw->input_node_index);
vec_add2 (rt->devices_and_queues, dq, 1);
dq->hw_if_index = hw_if_index;
dq->dev_instance = hw->dev_instance;
dq->queue_id = queue_id;
vnet_device_queue_update (vnm, rt);
vec_validate (hw->input_node_thread_index_by_queue, queue_id);
hw->input_node_thread_index_by_queue[queue_id] = thread_index;
vlib_node_set_state (vm, hw->input_node_index, rt->enabled_node_state);
}
int
vnet_device_input_unassign_thread (vnet_main_t * vnm, u32 hw_if_index,
u16 queue_id, uword thread_index)
{
vlib_main_t *vm;
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
vnet_device_input_runtime_t *rt;
vnet_device_and_queue_t *dq;
uword old_thread_index;
if (hw->input_node_thread_index_by_queue == 0)
return VNET_API_ERROR_INVALID_INTERFACE;
if (vec_len (hw->input_node_thread_index_by_queue) < queue_id + 1)
return VNET_API_ERROR_INVALID_INTERFACE;
old_thread_index = hw->input_node_thread_index_by_queue[queue_id];
if (old_thread_index == thread_index)
return 0;
vm = vlib_mains[old_thread_index];
rt = vlib_node_get_runtime_data (vm, hw->input_node_index);
vec_foreach (dq, rt->devices_and_queues)
if (dq->hw_if_index == hw_if_index && dq->queue_id == queue_id)
{
vec_del1 (rt->devices_and_queues, dq - rt->devices_and_queues);
goto deleted;
}
return VNET_API_ERROR_INVALID_INTERFACE;
deleted:
vnet_device_queue_update (vnm, rt);
if (vec_len (rt->devices_and_queues) == 0)
vlib_node_set_state (vm, hw->input_node_index, VLIB_NODE_STATE_DISABLED);
return 0;
}
int
vnet_device_input_set_mode (vnet_main_t * vnm, u32 hw_if_index, u16 queue_id,
vnet_device_input_mode_t mode)
{
vlib_main_t *vm;
uword thread_index;
vnet_device_and_queue_t *dq;
vlib_node_state_t enabled_node_state;
ASSERT (mode < VNET_DEVICE_INPUT_N_MODES);
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
vnet_device_input_runtime_t *rt;
int is_polling = 0;
if (hw->input_node_thread_index_by_queue == 0)
return VNET_API_ERROR_INVALID_INTERFACE;
thread_index = hw->input_node_thread_index_by_queue[queue_id];
vm = vlib_mains[thread_index];
rt = vlib_node_get_runtime_data (vm, hw->input_node_index);
vec_foreach (dq, rt->devices_and_queues)
{
if (dq->hw_if_index == hw_if_index && dq->queue_id == queue_id)
dq->mode = mode;
if (dq->mode == VNET_DEVICE_INPUT_MODE_POLLING)
is_polling = 1;
}
if (is_polling)
enabled_node_state = VLIB_NODE_STATE_POLLING;
else
enabled_node_state = VLIB_NODE_STATE_INTERRUPT;
if (rt->enabled_node_state != enabled_node_state)
{
rt->enabled_node_state = enabled_node_state;
if (vlib_node_get_state (vm, hw->input_node_index) !=
VLIB_NODE_STATE_DISABLED)
vlib_node_set_state (vm, hw->input_node_index, enabled_node_state);
}
return 0;
}
int
vnet_device_input_get_mode (vnet_main_t * vnm, u32 hw_if_index, u16 queue_id,
vnet_device_input_mode_t * mode)
{
vlib_main_t *vm;
uword thread_index;
vnet_device_and_queue_t *dq;
vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, hw_if_index);
vnet_device_input_runtime_t *rt;
if (hw->input_node_thread_index_by_queue == 0)
return VNET_API_ERROR_INVALID_INTERFACE;
thread_index = hw->input_node_thread_index_by_queue[queue_id];
vm = vlib_mains[thread_index];
rt = vlib_node_get_runtime_data (vm, hw->input_node_index);
vec_foreach (dq, rt->devices_and_queues)
if (dq->hw_if_index == hw_if_index && dq->queue_id == queue_id)
{
*mode = dq->mode;
return 0;
}
return VNET_API_ERROR_INVALID_INTERFACE;
}
static clib_error_t *
show_device_placement_fn (vlib_main_t * vm, unformat_input_t * input,
vlib_cli_command_t * cmd)
{
u8 *s = 0;
vnet_main_t *vnm = vnet_get_main ();
vnet_device_input_runtime_t *rt;
vnet_device_and_queue_t *dq;
vlib_node_t *pn = vlib_get_node_by_name (vm, (u8 *) "device-input");
uword si;
int index = 0;
/* *INDENT-OFF* */
foreach_vlib_main (({
clib_bitmap_foreach (si, pn->sibling_bitmap,
({
rt = vlib_node_get_runtime_data (this_vlib_main, si);
if (vec_len (rt->devices_and_queues))
s = format (s, " node %U:\n", format_vlib_node_name, vm, si);
vec_foreach (dq, rt->devices_and_queues)
{
s = format (s, " %U queue %u (%s)\n",
format_vnet_sw_if_index_name, vnm, dq->hw_if_index,
dq->queue_id,
dq->mode == VNET_DEVICE_INPUT_MODE_POLLING ?
"polling" : "interrupt");
}
}));
if (vec_len (s) > 0)
{
vlib_cli_output(vm, "Thread %u (%v):\n%v", index,
vlib_worker_threads[index].name, s);
vec_reset_length (s);
}
index++;
}));
/* *INDENT-ON* */
vec_free (s);
return 0;
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (memif_delete_command, static) = {
.path = "show interface placement",
.short_help = "show interface placement",
.function = show_device_placement_fn,
};
/* *INDENT-ON* */
static clib_error_t *
set_device_placement (vlib_main_t * vm, unformat_input_t * input,
vlib_cli_command_t * cmd)
{
clib_error_t *error = 0;
unformat_input_t _line_input, *line_input = &_line_input;
vnet_main_t *vnm = vnet_get_main ();
vnet_device_main_t *vdm = &vnet_device_main;
vnet_device_input_mode_t mode;
u32 hw_if_index = (u32) ~ 0;
u32 queue_id = (u32) 0;
u32 thread_index = (u32) ~ 0;
int rv;
if (!unformat_user (input, unformat_line_input, line_input))
return 0;
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat
(line_input, "%U", unformat_vnet_hw_interface, vnm, &hw_if_index))
;
else if (unformat (line_input, "queue %d", &queue_id))
;
else if (unformat (line_input, "main", &thread_index))
thread_index = 0;
else if (unformat (line_input, "worker %d", &thread_index))
thread_index += vdm->first_worker_thread_index;
else
{
error = clib_error_return (0, "parse error: '%U'",
format_unformat_error, line_input);
unformat_free (line_input);
return error;
}
}
unformat_free (line_input);
if (hw_if_index == (u32) ~ 0)
return clib_error_return (0, "please specify valid interface name");
if (thread_index > vdm->last_worker_thread_index)
return clib_error_return (0,
"please specify valid worker thread or main");
rv = vnet_device_input_get_mode (vnm, hw_if_index, queue_id, &mode);
if (rv)
return clib_error_return (0, "not found");
rv = vnet_device_input_unassign_thread (vnm, hw_if_index, queue_id,
thread_index);
if (rv)
return clib_error_return (0, "not found");
vnet_device_input_assign_thread (vnm, hw_if_index, queue_id, thread_index);
vnet_device_input_set_mode (vnm, hw_if_index, queue_id, mode);
return 0;
}
/*?
* This command is used to assign a given interface, and optionally a
* given queue, to a different thread. If the '<em>queue</em>' is not provided,
* it defaults to 0.
*
* @cliexpar
* Example of how to display the interface placement:
* @cliexstart{show interface placement}
* Thread 1 (vpp_wk_0):
* GigabitEthernet0/8/0 queue 0
* GigabitEthernet0/9/0 queue 0
* Thread 2 (vpp_wk_1):
* GigabitEthernet0/8/0 queue 1
* GigabitEthernet0/9/0 queue 1
* @cliexend
* Example of how to assign a interface and queue to a thread:
* @cliexcmd{set interface placement GigabitEthernet0/8/0 queue 1 thread 1}
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (cmd_set_dpdk_if_placement,static) = {
.path = "set interface placement",
.short_help = "set interface placement <interface> [queue <n>] [thread <n> | main]",
.function = set_device_placement,
};
/* *INDENT-ON* */
static clib_error_t *
vnet_device_init (vlib_main_t * vm)
{
vnet_device_main_t *vdm = &vnet_device_main;
vlib_thread_main_t *tm = vlib_get_thread_main ();
vlib_thread_registration_t *tr;
uword *p;
vec_validate_aligned (vdm->workers, tm->n_vlib_mains - 1,
CLIB_CACHE_LINE_BYTES);
p = hash_get_mem (tm->thread_registrations_by_name, "workers");
tr = p ? (vlib_thread_registration_t *) p[0] : 0;
if (tr && tr->count > 0)
{
vdm->first_worker_thread_index = tr->first_index;
vdm->next_worker_thread_index = tr->first_index;
vdm->last_worker_thread_index = tr->first_index + tr->count - 1;
}
return 0;
}
VLIB_INIT_FUNCTION (vnet_device_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/