990 lines
25 KiB
C
990 lines
25 KiB
C
/*-
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* Copyright (c) 2017 Chelsio Communications, Inc.
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* All rights reserved.
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* Written by: Navdeep Parhar <np@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include "opt_ratelimit.h"
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#include <sys/types.h>
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#include <sys/malloc.h>
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#include <sys/queue.h>
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#include <sys/sbuf.h>
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#include <sys/taskqueue.h>
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#include <sys/sysctl.h>
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#include "common/common.h"
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#include "common/t4_regs.h"
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#include "common/t4_regs_values.h"
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#include "common/t4_msg.h"
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static int
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in_range(int val, int lo, int hi)
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{
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return (val < 0 || (val <= hi && val >= lo));
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}
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static int
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set_sched_class_config(struct adapter *sc, int minmax)
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{
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int rc;
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if (minmax < 0)
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return (EINVAL);
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rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4sscc");
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if (rc)
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return (rc);
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if (hw_off_limits(sc))
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rc = ENXIO;
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else
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rc = -t4_sched_config(sc, FW_SCHED_TYPE_PKTSCHED, minmax, 1);
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end_synchronized_op(sc, 0);
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return (rc);
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}
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static int
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set_sched_class_params(struct adapter *sc, struct t4_sched_class_params *p,
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int sleep_ok)
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{
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int rc, top_speed, fw_level, fw_mode, fw_rateunit, fw_ratemode;
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struct port_info *pi;
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struct tx_cl_rl_params *tc, old;
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bool check_pktsize = false;
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if (p->level == SCHED_CLASS_LEVEL_CL_RL)
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fw_level = FW_SCHED_PARAMS_LEVEL_CL_RL;
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else if (p->level == SCHED_CLASS_LEVEL_CL_WRR)
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fw_level = FW_SCHED_PARAMS_LEVEL_CL_WRR;
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else if (p->level == SCHED_CLASS_LEVEL_CH_RL)
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fw_level = FW_SCHED_PARAMS_LEVEL_CH_RL;
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else
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return (EINVAL);
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if (p->level == SCHED_CLASS_LEVEL_CL_RL) {
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if (p->mode == SCHED_CLASS_MODE_CLASS)
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fw_mode = FW_SCHED_PARAMS_MODE_CLASS;
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else if (p->mode == SCHED_CLASS_MODE_FLOW) {
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check_pktsize = true;
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fw_mode = FW_SCHED_PARAMS_MODE_FLOW;
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} else
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return (EINVAL);
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} else
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fw_mode = 0;
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/* Valid channel must always be provided. */
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if (p->channel < 0)
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return (EINVAL);
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if (!in_range(p->channel, 0, sc->chip_params->nchan - 1))
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return (ERANGE);
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pi = sc->port[sc->chan_map[p->channel]];
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if (pi == NULL)
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return (ENXIO);
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MPASS(pi->tx_chan == p->channel);
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top_speed = port_top_speed(pi) * 1000000; /* Gbps -> Kbps */
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if (p->level == SCHED_CLASS_LEVEL_CL_RL ||
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p->level == SCHED_CLASS_LEVEL_CH_RL) {
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/*
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* Valid rate (mode, unit and values) must be provided.
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*/
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if (p->minrate < 0)
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p->minrate = 0;
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if (p->maxrate < 0)
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return (EINVAL);
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if (p->rateunit == SCHED_CLASS_RATEUNIT_BITS) {
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fw_rateunit = FW_SCHED_PARAMS_UNIT_BITRATE;
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/* ratemode could be relative (%) or absolute. */
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if (p->ratemode == SCHED_CLASS_RATEMODE_REL) {
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fw_ratemode = FW_SCHED_PARAMS_RATE_REL;
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/* maxrate is % of port bandwidth. */
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if (!in_range(p->minrate, 0, 100) ||
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!in_range(p->maxrate, 0, 100)) {
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return (ERANGE);
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}
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} else if (p->ratemode == SCHED_CLASS_RATEMODE_ABS) {
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fw_ratemode = FW_SCHED_PARAMS_RATE_ABS;
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/* maxrate is absolute value in kbps. */
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if (!in_range(p->minrate, 0, top_speed) ||
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!in_range(p->maxrate, 0, top_speed)) {
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return (ERANGE);
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}
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} else
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return (EINVAL);
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} else if (p->rateunit == SCHED_CLASS_RATEUNIT_PKTS) {
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/* maxrate is the absolute value in pps. */
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check_pktsize = true;
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fw_rateunit = FW_SCHED_PARAMS_UNIT_PKTRATE;
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} else
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return (EINVAL);
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} else {
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MPASS(p->level == SCHED_CLASS_LEVEL_CL_WRR);
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/*
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* Valid weight must be provided.
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*/
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if (p->weight < 0)
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return (EINVAL);
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if (!in_range(p->weight, 1, 99))
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return (ERANGE);
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fw_rateunit = 0;
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fw_ratemode = 0;
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}
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if (p->level == SCHED_CLASS_LEVEL_CL_RL ||
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p->level == SCHED_CLASS_LEVEL_CL_WRR) {
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/*
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* Valid scheduling class must be provided.
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*/
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if (p->cl < 0)
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return (EINVAL);
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if (!in_range(p->cl, 0, sc->params.nsched_cls - 1))
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return (ERANGE);
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}
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if (check_pktsize) {
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if (p->pktsize < 0)
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return (EINVAL);
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if (!in_range(p->pktsize, 64, if_getmtu(pi->vi[0].ifp)))
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return (ERANGE);
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}
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if (p->level == SCHED_CLASS_LEVEL_CL_RL) {
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tc = &pi->sched_params->cl_rl[p->cl];
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mtx_lock(&sc->tc_lock);
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if (tc->refcount > 0 || tc->state == CS_HW_UPDATE_IN_PROGRESS)
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rc = EBUSY;
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else {
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old = *tc;
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tc->flags |= CF_USER;
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tc->state = CS_HW_UPDATE_IN_PROGRESS;
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tc->ratemode = fw_ratemode;
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tc->rateunit = fw_rateunit;
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tc->mode = fw_mode;
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tc->maxrate = p->maxrate;
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tc->pktsize = p->pktsize;
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rc = 0;
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}
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mtx_unlock(&sc->tc_lock);
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if (rc != 0)
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return (rc);
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}
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rc = begin_synchronized_op(sc, NULL,
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sleep_ok ? (SLEEP_OK | INTR_OK) : HOLD_LOCK, "t4sscp");
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if (rc != 0) {
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if (p->level == SCHED_CLASS_LEVEL_CL_RL) {
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mtx_lock(&sc->tc_lock);
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MPASS(tc->refcount == 0);
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MPASS(tc->flags & CF_USER);
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MPASS(tc->state == CS_HW_UPDATE_IN_PROGRESS);
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*tc = old;
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mtx_unlock(&sc->tc_lock);
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}
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return (rc);
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}
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if (!hw_off_limits(sc)) {
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rc = -t4_sched_params(sc, FW_SCHED_TYPE_PKTSCHED, fw_level,
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fw_mode, fw_rateunit, fw_ratemode, p->channel, p->cl,
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p->minrate, p->maxrate, p->weight, p->pktsize, 0, sleep_ok);
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}
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end_synchronized_op(sc, sleep_ok ? 0 : LOCK_HELD);
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if (p->level == SCHED_CLASS_LEVEL_CL_RL) {
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mtx_lock(&sc->tc_lock);
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MPASS(tc->refcount == 0);
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MPASS(tc->flags & CF_USER);
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MPASS(tc->state == CS_HW_UPDATE_IN_PROGRESS);
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if (rc == 0)
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tc->state = CS_HW_CONFIGURED;
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else {
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/* parameters failed so we don't park at params_set */
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tc->state = CS_UNINITIALIZED;
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tc->flags &= ~CF_USER;
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CH_ERR(pi, "failed to configure traffic class %d: %d. "
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"params: mode %d, rateunit %d, ratemode %d, "
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"channel %d, minrate %d, maxrate %d, pktsize %d, "
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"burstsize %d\n", p->cl, rc, fw_mode, fw_rateunit,
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fw_ratemode, p->channel, p->minrate, p->maxrate,
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p->pktsize, 0);
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}
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mtx_unlock(&sc->tc_lock);
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}
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return (rc);
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}
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static void
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update_tx_sched(void *context, int pending)
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{
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int i, j, rc;
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struct port_info *pi;
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struct tx_cl_rl_params *tc;
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struct adapter *sc = context;
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const int n = sc->params.nsched_cls;
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mtx_lock(&sc->tc_lock);
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for_each_port(sc, i) {
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pi = sc->port[i];
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tc = &pi->sched_params->cl_rl[0];
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for (j = 0; j < n; j++, tc++) {
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MPASS(mtx_owned(&sc->tc_lock));
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if (tc->state != CS_HW_UPDATE_REQUESTED)
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continue;
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mtx_unlock(&sc->tc_lock);
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if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK,
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"t4utxs") != 0) {
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mtx_lock(&sc->tc_lock);
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continue;
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}
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rc = -t4_sched_params(sc, FW_SCHED_TYPE_PKTSCHED,
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FW_SCHED_PARAMS_LEVEL_CL_RL, tc->mode, tc->rateunit,
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tc->ratemode, pi->tx_chan, j, 0, tc->maxrate, 0,
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tc->pktsize, tc->burstsize, 1);
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end_synchronized_op(sc, 0);
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mtx_lock(&sc->tc_lock);
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MPASS(tc->state == CS_HW_UPDATE_REQUESTED);
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if (rc == 0) {
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tc->state = CS_HW_CONFIGURED;
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continue;
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}
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/* parameters failed so we try to avoid params_set */
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if (tc->refcount > 0)
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tc->state = CS_PARAMS_SET;
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else
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tc->state = CS_UNINITIALIZED;
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CH_ERR(pi, "failed to configure traffic class %d: %d. "
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"params: mode %d, rateunit %d, ratemode %d, "
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"channel %d, minrate %d, maxrate %d, pktsize %d, "
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"burstsize %d\n", j, rc, tc->mode, tc->rateunit,
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tc->ratemode, pi->tx_chan, 0, tc->maxrate,
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tc->pktsize, tc->burstsize);
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}
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}
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mtx_unlock(&sc->tc_lock);
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}
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int
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t4_set_sched_class(struct adapter *sc, struct t4_sched_params *p)
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{
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if (p->type != SCHED_CLASS_TYPE_PACKET)
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return (EINVAL);
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if (p->subcmd == SCHED_CLASS_SUBCMD_CONFIG)
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return (set_sched_class_config(sc, p->u.config.minmax));
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if (p->subcmd == SCHED_CLASS_SUBCMD_PARAMS)
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return (set_sched_class_params(sc, &p->u.params, 1));
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return (EINVAL);
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}
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static int
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bind_txq_to_traffic_class(struct adapter *sc, struct sge_txq *txq, int idx)
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{
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struct tx_cl_rl_params *tc0, *tc;
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int rc, old_idx;
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uint32_t fw_mnem, fw_class;
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if (!(txq->eq.flags & EQ_HW_ALLOCATED))
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return (ENXIO);
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mtx_lock(&sc->tc_lock);
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if (txq->tc_idx == -2) {
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rc = EBUSY; /* Another bind/unbind in progress already. */
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goto done;
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}
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if (idx == txq->tc_idx) {
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rc = 0; /* No change, nothing to do. */
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goto done;
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}
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tc0 = &sc->port[txq->eq.tx_chan]->sched_params->cl_rl[0];
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if (idx != -1) {
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/*
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* Bind to a different class at index idx.
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*/
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tc = &tc0[idx];
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if (tc->state != CS_HW_CONFIGURED) {
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rc = ENXIO;
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goto done;
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} else {
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/*
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* Ok to proceed. Place a reference on the new class
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* while still holding on to the reference on the
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* previous class, if any.
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*/
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tc->refcount++;
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}
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}
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/* Mark as busy before letting go of the lock. */
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old_idx = txq->tc_idx;
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txq->tc_idx = -2;
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mtx_unlock(&sc->tc_lock);
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rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4btxq");
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if (rc == 0) {
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fw_mnem = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DMAQ) |
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V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DMAQ_EQ_SCHEDCLASS_ETH) |
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V_FW_PARAMS_PARAM_YZ(txq->eq.cntxt_id));
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fw_class = idx < 0 ? 0xffffffff : idx;
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rc = -t4_set_params(sc, sc->mbox, sc->pf, 0, 1, &fw_mnem,
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&fw_class);
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end_synchronized_op(sc, 0);
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}
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mtx_lock(&sc->tc_lock);
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MPASS(txq->tc_idx == -2);
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if (rc == 0) {
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/*
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* Unbind, bind, or bind to a different class succeeded. Remove
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* the reference on the old traffic class, if any.
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*/
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if (old_idx != -1) {
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tc = &tc0[old_idx];
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MPASS(tc->refcount > 0);
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tc->refcount--;
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}
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txq->tc_idx = idx;
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} else {
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/*
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* Unbind, bind, or bind to a different class failed. Remove
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* the anticipatory reference on the new traffic class, if any.
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*/
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if (idx != -1) {
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tc = &tc0[idx];
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MPASS(tc->refcount > 0);
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tc->refcount--;
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}
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txq->tc_idx = old_idx;
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}
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done:
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MPASS(txq->tc_idx >= -1 && txq->tc_idx < sc->params.nsched_cls);
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mtx_unlock(&sc->tc_lock);
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return (rc);
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}
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int
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t4_set_sched_queue(struct adapter *sc, struct t4_sched_queue *p)
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{
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struct port_info *pi = NULL;
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struct vi_info *vi;
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struct sge_txq *txq;
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int i, rc;
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if (p->port >= sc->params.nports)
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return (EINVAL);
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/*
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* XXX: cxgbetool allows the user to specify the physical port only. So
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* we always operate on the main VI.
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*/
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pi = sc->port[p->port];
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vi = &pi->vi[0];
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/* Checking VI_INIT_DONE outside a synch-op is a harmless race here. */
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if (!(vi->flags & VI_INIT_DONE))
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return (EAGAIN);
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MPASS(vi->ntxq > 0);
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if (!in_range(p->queue, 0, vi->ntxq - 1) ||
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!in_range(p->cl, 0, sc->params.nsched_cls - 1))
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return (EINVAL);
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if (p->queue < 0) {
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/*
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* Change the scheduling on all the TX queues for the
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* interface.
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*/
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for_each_txq(vi, i, txq) {
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rc = bind_txq_to_traffic_class(sc, txq, p->cl);
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if (rc != 0)
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break;
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}
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} else {
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/*
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* If op.queue is non-negative, then we're only changing the
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* scheduling on a single specified TX queue.
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*/
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txq = &sc->sge.txq[vi->first_txq + p->queue];
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rc = bind_txq_to_traffic_class(sc, txq, p->cl);
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}
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return (rc);
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}
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int
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t4_init_tx_sched(struct adapter *sc)
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{
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int i;
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const int n = sc->params.nsched_cls;
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struct port_info *pi;
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mtx_init(&sc->tc_lock, "tx_sched lock", NULL, MTX_DEF);
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TASK_INIT(&sc->tc_task, 0, update_tx_sched, sc);
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for_each_port(sc, i) {
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pi = sc->port[i];
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pi->sched_params = malloc(sizeof(*pi->sched_params) +
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n * sizeof(struct tx_cl_rl_params), M_CXGBE, M_ZERO | M_WAITOK);
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}
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return (0);
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}
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int
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t4_free_tx_sched(struct adapter *sc)
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{
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int i;
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taskqueue_drain(taskqueue_thread, &sc->tc_task);
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for_each_port(sc, i) {
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if (sc->port[i] != NULL)
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free(sc->port[i]->sched_params, M_CXGBE);
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}
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if (mtx_initialized(&sc->tc_lock))
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mtx_destroy(&sc->tc_lock);
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return (0);
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}
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void
|
|
t4_update_tx_sched(struct adapter *sc)
|
|
{
|
|
|
|
taskqueue_enqueue(taskqueue_thread, &sc->tc_task);
|
|
}
|
|
|
|
int
|
|
t4_reserve_cl_rl_kbps(struct adapter *sc, int port_id, u_int maxrate,
|
|
int *tc_idx)
|
|
{
|
|
int rc = 0, fa, fa2, i, pktsize, burstsize;
|
|
bool update;
|
|
struct tx_cl_rl_params *tc;
|
|
struct port_info *pi;
|
|
|
|
MPASS(port_id >= 0 && port_id < sc->params.nports);
|
|
|
|
pi = sc->port[port_id];
|
|
if (pi->sched_params->pktsize > 0)
|
|
pktsize = pi->sched_params->pktsize;
|
|
else
|
|
pktsize = if_getmtu(pi->vi[0].ifp);
|
|
if (pi->sched_params->burstsize > 0)
|
|
burstsize = pi->sched_params->burstsize;
|
|
else
|
|
burstsize = pktsize * 4;
|
|
tc = &pi->sched_params->cl_rl[0];
|
|
|
|
update = false;
|
|
fa = fa2 = -1;
|
|
mtx_lock(&sc->tc_lock);
|
|
for (i = 0; i < sc->params.nsched_cls; i++, tc++) {
|
|
if (tc->state >= CS_PARAMS_SET &&
|
|
tc->ratemode == FW_SCHED_PARAMS_RATE_ABS &&
|
|
tc->rateunit == FW_SCHED_PARAMS_UNIT_BITRATE &&
|
|
tc->mode == FW_SCHED_PARAMS_MODE_FLOW &&
|
|
tc->maxrate == maxrate && tc->pktsize == pktsize &&
|
|
tc->burstsize == burstsize) {
|
|
tc->refcount++;
|
|
*tc_idx = i;
|
|
if (tc->state == CS_PARAMS_SET) {
|
|
tc->state = CS_HW_UPDATE_REQUESTED;
|
|
update = true;
|
|
}
|
|
goto done;
|
|
}
|
|
|
|
if (fa < 0 && tc->state == CS_UNINITIALIZED) {
|
|
MPASS(tc->refcount == 0);
|
|
fa = i; /* first available, never used. */
|
|
}
|
|
if (fa2 < 0 && tc->refcount == 0 && !(tc->flags & CF_USER)) {
|
|
fa2 = i; /* first available, used previously. */
|
|
}
|
|
}
|
|
/* Not found */
|
|
MPASS(i == sc->params.nsched_cls);
|
|
if (fa == -1)
|
|
fa = fa2;
|
|
if (fa == -1) {
|
|
*tc_idx = -1;
|
|
rc = ENOSPC;
|
|
} else {
|
|
MPASS(fa >= 0 && fa < sc->params.nsched_cls);
|
|
tc = &pi->sched_params->cl_rl[fa];
|
|
MPASS(!(tc->flags & CF_USER));
|
|
MPASS(tc->refcount == 0);
|
|
|
|
tc->refcount = 1;
|
|
tc->state = CS_HW_UPDATE_REQUESTED;
|
|
tc->ratemode = FW_SCHED_PARAMS_RATE_ABS;
|
|
tc->rateunit = FW_SCHED_PARAMS_UNIT_BITRATE;
|
|
tc->mode = FW_SCHED_PARAMS_MODE_FLOW;
|
|
tc->maxrate = maxrate;
|
|
tc->pktsize = pktsize;
|
|
tc->burstsize = burstsize;
|
|
*tc_idx = fa;
|
|
update = true;
|
|
}
|
|
done:
|
|
mtx_unlock(&sc->tc_lock);
|
|
if (update)
|
|
t4_update_tx_sched(sc);
|
|
return (rc);
|
|
}
|
|
|
|
void
|
|
t4_release_cl_rl(struct adapter *sc, int port_id, int tc_idx)
|
|
{
|
|
struct tx_cl_rl_params *tc;
|
|
|
|
MPASS(port_id >= 0 && port_id < sc->params.nports);
|
|
MPASS(tc_idx >= 0 && tc_idx < sc->params.nsched_cls);
|
|
|
|
mtx_lock(&sc->tc_lock);
|
|
tc = &sc->port[port_id]->sched_params->cl_rl[tc_idx];
|
|
MPASS(tc->refcount > 0);
|
|
tc->refcount--;
|
|
mtx_unlock(&sc->tc_lock);
|
|
}
|
|
|
|
int
|
|
sysctl_tc(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct vi_info *vi = arg1;
|
|
struct adapter *sc = vi->adapter;
|
|
struct sge_txq *txq;
|
|
int qidx = arg2, rc, tc_idx;
|
|
|
|
MPASS(qidx >= vi->first_txq && qidx < vi->first_txq + vi->ntxq);
|
|
|
|
txq = &sc->sge.txq[qidx];
|
|
tc_idx = txq->tc_idx;
|
|
rc = sysctl_handle_int(oidp, &tc_idx, 0, req);
|
|
if (rc != 0 || req->newptr == NULL)
|
|
return (rc);
|
|
|
|
if (sc->flags & IS_VF)
|
|
return (EPERM);
|
|
if (!in_range(tc_idx, 0, sc->params.nsched_cls - 1))
|
|
return (EINVAL);
|
|
|
|
return (bind_txq_to_traffic_class(sc, txq, tc_idx));
|
|
}
|
|
|
|
int
|
|
sysctl_tc_params(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct adapter *sc = arg1;
|
|
struct tx_cl_rl_params tc;
|
|
struct sbuf *sb;
|
|
int i, rc, port_id, mbps, gbps;
|
|
|
|
rc = sysctl_wire_old_buffer(req, 0);
|
|
if (rc != 0)
|
|
return (rc);
|
|
|
|
sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
|
|
if (sb == NULL)
|
|
return (ENOMEM);
|
|
|
|
port_id = arg2 >> 16;
|
|
MPASS(port_id < sc->params.nports);
|
|
MPASS(sc->port[port_id] != NULL);
|
|
i = arg2 & 0xffff;
|
|
MPASS(i < sc->params.nsched_cls);
|
|
|
|
mtx_lock(&sc->tc_lock);
|
|
tc = sc->port[port_id]->sched_params->cl_rl[i];
|
|
mtx_unlock(&sc->tc_lock);
|
|
|
|
if (tc.state < CS_PARAMS_SET) {
|
|
sbuf_printf(sb, "uninitialized");
|
|
goto done;
|
|
}
|
|
|
|
switch (tc.rateunit) {
|
|
case SCHED_CLASS_RATEUNIT_BITS:
|
|
switch (tc.ratemode) {
|
|
case SCHED_CLASS_RATEMODE_REL:
|
|
/* XXX: top speed or actual link speed? */
|
|
gbps = port_top_speed(sc->port[port_id]);
|
|
sbuf_printf(sb, "%u%% of %uGbps", tc.maxrate, gbps);
|
|
break;
|
|
case SCHED_CLASS_RATEMODE_ABS:
|
|
mbps = tc.maxrate / 1000;
|
|
gbps = tc.maxrate / 1000000;
|
|
if (tc.maxrate == gbps * 1000000)
|
|
sbuf_printf(sb, "%uGbps", gbps);
|
|
else if (tc.maxrate == mbps * 1000)
|
|
sbuf_printf(sb, "%uMbps", mbps);
|
|
else
|
|
sbuf_printf(sb, "%uKbps", tc.maxrate);
|
|
break;
|
|
default:
|
|
rc = ENXIO;
|
|
goto done;
|
|
}
|
|
break;
|
|
case SCHED_CLASS_RATEUNIT_PKTS:
|
|
sbuf_printf(sb, "%upps", tc.maxrate);
|
|
break;
|
|
default:
|
|
rc = ENXIO;
|
|
goto done;
|
|
}
|
|
|
|
switch (tc.mode) {
|
|
case SCHED_CLASS_MODE_CLASS:
|
|
/* Note that pktsize and burstsize are not used in this mode. */
|
|
sbuf_printf(sb, " aggregate");
|
|
break;
|
|
case SCHED_CLASS_MODE_FLOW:
|
|
sbuf_printf(sb, " per-flow");
|
|
if (tc.pktsize > 0)
|
|
sbuf_printf(sb, " pkt-size %u", tc.pktsize);
|
|
if (tc.burstsize > 0)
|
|
sbuf_printf(sb, " burst-size %u", tc.burstsize);
|
|
break;
|
|
default:
|
|
rc = ENXIO;
|
|
goto done;
|
|
}
|
|
|
|
done:
|
|
if (rc == 0)
|
|
rc = sbuf_finish(sb);
|
|
sbuf_delete(sb);
|
|
|
|
return (rc);
|
|
}
|
|
|
|
#ifdef RATELIMIT
|
|
void
|
|
t4_init_etid_table(struct adapter *sc)
|
|
{
|
|
int i;
|
|
struct tid_info *t;
|
|
|
|
if (!is_ethoffload(sc))
|
|
return;
|
|
|
|
t = &sc->tids;
|
|
MPASS(t->netids > 0);
|
|
|
|
mtx_init(&t->etid_lock, "etid lock", NULL, MTX_DEF);
|
|
t->etid_tab = malloc(sizeof(*t->etid_tab) * t->netids, M_CXGBE,
|
|
M_ZERO | M_WAITOK);
|
|
t->efree = t->etid_tab;
|
|
t->etids_in_use = 0;
|
|
for (i = 1; i < t->netids; i++)
|
|
t->etid_tab[i - 1].next = &t->etid_tab[i];
|
|
t->etid_tab[t->netids - 1].next = NULL;
|
|
}
|
|
|
|
void
|
|
t4_free_etid_table(struct adapter *sc)
|
|
{
|
|
struct tid_info *t;
|
|
|
|
if (!is_ethoffload(sc))
|
|
return;
|
|
|
|
t = &sc->tids;
|
|
MPASS(t->netids > 0);
|
|
|
|
free(t->etid_tab, M_CXGBE);
|
|
t->etid_tab = NULL;
|
|
|
|
if (mtx_initialized(&t->etid_lock))
|
|
mtx_destroy(&t->etid_lock);
|
|
}
|
|
|
|
/* etid services */
|
|
static int alloc_etid(struct adapter *, struct cxgbe_rate_tag *);
|
|
static void free_etid(struct adapter *, int);
|
|
|
|
static int
|
|
alloc_etid(struct adapter *sc, struct cxgbe_rate_tag *cst)
|
|
{
|
|
struct tid_info *t = &sc->tids;
|
|
int etid = -1;
|
|
|
|
mtx_lock(&t->etid_lock);
|
|
if (t->efree) {
|
|
union etid_entry *p = t->efree;
|
|
|
|
etid = p - t->etid_tab + t->etid_base;
|
|
t->efree = p->next;
|
|
p->cst = cst;
|
|
t->etids_in_use++;
|
|
}
|
|
mtx_unlock(&t->etid_lock);
|
|
return (etid);
|
|
}
|
|
|
|
struct cxgbe_rate_tag *
|
|
lookup_etid(struct adapter *sc, int etid)
|
|
{
|
|
struct tid_info *t = &sc->tids;
|
|
|
|
return (t->etid_tab[etid - t->etid_base].cst);
|
|
}
|
|
|
|
static void
|
|
free_etid(struct adapter *sc, int etid)
|
|
{
|
|
struct tid_info *t = &sc->tids;
|
|
union etid_entry *p = &t->etid_tab[etid - t->etid_base];
|
|
|
|
mtx_lock(&t->etid_lock);
|
|
p->next = t->efree;
|
|
t->efree = p;
|
|
t->etids_in_use--;
|
|
mtx_unlock(&t->etid_lock);
|
|
}
|
|
|
|
static int cxgbe_rate_tag_modify(struct m_snd_tag *,
|
|
union if_snd_tag_modify_params *);
|
|
static int cxgbe_rate_tag_query(struct m_snd_tag *,
|
|
union if_snd_tag_query_params *);
|
|
static void cxgbe_rate_tag_free(struct m_snd_tag *);
|
|
|
|
static const struct if_snd_tag_sw cxgbe_rate_tag_sw = {
|
|
.snd_tag_modify = cxgbe_rate_tag_modify,
|
|
.snd_tag_query = cxgbe_rate_tag_query,
|
|
.snd_tag_free = cxgbe_rate_tag_free,
|
|
.type = IF_SND_TAG_TYPE_RATE_LIMIT
|
|
};
|
|
|
|
int
|
|
cxgbe_rate_tag_alloc(if_t ifp, union if_snd_tag_alloc_params *params,
|
|
struct m_snd_tag **pt)
|
|
{
|
|
int rc, schedcl;
|
|
struct vi_info *vi = if_getsoftc(ifp);
|
|
struct port_info *pi = vi->pi;
|
|
struct adapter *sc = pi->adapter;
|
|
struct cxgbe_rate_tag *cst;
|
|
|
|
MPASS(params->hdr.type == IF_SND_TAG_TYPE_RATE_LIMIT);
|
|
|
|
rc = t4_reserve_cl_rl_kbps(sc, pi->port_id,
|
|
(params->rate_limit.max_rate * 8ULL / 1000), &schedcl);
|
|
if (rc != 0)
|
|
return (rc);
|
|
MPASS(schedcl >= 0 && schedcl < sc->params.nsched_cls);
|
|
|
|
cst = malloc(sizeof(*cst), M_CXGBE, M_ZERO | M_NOWAIT);
|
|
if (cst == NULL) {
|
|
failed:
|
|
t4_release_cl_rl(sc, pi->port_id, schedcl);
|
|
return (ENOMEM);
|
|
}
|
|
|
|
cst->etid = alloc_etid(sc, cst);
|
|
if (cst->etid < 0) {
|
|
free(cst, M_CXGBE);
|
|
goto failed;
|
|
}
|
|
|
|
mtx_init(&cst->lock, "cst_lock", NULL, MTX_DEF);
|
|
mbufq_init(&cst->pending_tx, INT_MAX);
|
|
mbufq_init(&cst->pending_fwack, INT_MAX);
|
|
m_snd_tag_init(&cst->com, ifp, &cxgbe_rate_tag_sw);
|
|
cst->flags |= EO_FLOWC_PENDING | EO_SND_TAG_REF;
|
|
cst->adapter = sc;
|
|
cst->port_id = pi->port_id;
|
|
cst->schedcl = schedcl;
|
|
cst->max_rate = params->rate_limit.max_rate;
|
|
cst->tx_credits = sc->params.eo_wr_cred;
|
|
cst->tx_total = cst->tx_credits;
|
|
cst->plen = 0;
|
|
cst->ctrl0 = htobe32(V_TXPKT_OPCODE(CPL_TX_PKT_XT) |
|
|
V_TXPKT_INTF(pi->tx_chan) | V_TXPKT_PF(sc->pf) |
|
|
V_TXPKT_VF(vi->vin) | V_TXPKT_VF_VLD(vi->vfvld));
|
|
|
|
/*
|
|
* Queues will be selected later when the connection flowid is available.
|
|
*/
|
|
|
|
*pt = &cst->com;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Change in parameters, no change in ifp.
|
|
*/
|
|
static int
|
|
cxgbe_rate_tag_modify(struct m_snd_tag *mst,
|
|
union if_snd_tag_modify_params *params)
|
|
{
|
|
int rc, schedcl;
|
|
struct cxgbe_rate_tag *cst = mst_to_crt(mst);
|
|
struct adapter *sc = cst->adapter;
|
|
|
|
/* XXX: is schedcl -1 ok here? */
|
|
MPASS(cst->schedcl >= 0 && cst->schedcl < sc->params.nsched_cls);
|
|
|
|
mtx_lock(&cst->lock);
|
|
MPASS(cst->flags & EO_SND_TAG_REF);
|
|
rc = t4_reserve_cl_rl_kbps(sc, cst->port_id,
|
|
(params->rate_limit.max_rate * 8ULL / 1000), &schedcl);
|
|
if (rc != 0)
|
|
return (rc);
|
|
MPASS(schedcl >= 0 && schedcl < sc->params.nsched_cls);
|
|
t4_release_cl_rl(sc, cst->port_id, cst->schedcl);
|
|
cst->schedcl = schedcl;
|
|
cst->max_rate = params->rate_limit.max_rate;
|
|
mtx_unlock(&cst->lock);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
cxgbe_rate_tag_query(struct m_snd_tag *mst,
|
|
union if_snd_tag_query_params *params)
|
|
{
|
|
struct cxgbe_rate_tag *cst = mst_to_crt(mst);
|
|
|
|
params->rate_limit.max_rate = cst->max_rate;
|
|
|
|
#define CST_TO_MST_QLEVEL_SCALE (IF_SND_QUEUE_LEVEL_MAX / cst->tx_total)
|
|
params->rate_limit.queue_level =
|
|
(cst->tx_total - cst->tx_credits) * CST_TO_MST_QLEVEL_SCALE;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Unlocks cst and frees it.
|
|
*/
|
|
void
|
|
cxgbe_rate_tag_free_locked(struct cxgbe_rate_tag *cst)
|
|
{
|
|
struct adapter *sc = cst->adapter;
|
|
|
|
mtx_assert(&cst->lock, MA_OWNED);
|
|
MPASS((cst->flags & EO_SND_TAG_REF) == 0);
|
|
MPASS(cst->tx_credits == cst->tx_total);
|
|
MPASS(cst->plen == 0);
|
|
MPASS(mbufq_first(&cst->pending_tx) == NULL);
|
|
MPASS(mbufq_first(&cst->pending_fwack) == NULL);
|
|
|
|
if (cst->etid >= 0)
|
|
free_etid(sc, cst->etid);
|
|
if (cst->schedcl != -1)
|
|
t4_release_cl_rl(sc, cst->port_id, cst->schedcl);
|
|
mtx_unlock(&cst->lock);
|
|
mtx_destroy(&cst->lock);
|
|
free(cst, M_CXGBE);
|
|
}
|
|
|
|
static void
|
|
cxgbe_rate_tag_free(struct m_snd_tag *mst)
|
|
{
|
|
struct cxgbe_rate_tag *cst = mst_to_crt(mst);
|
|
|
|
mtx_lock(&cst->lock);
|
|
|
|
/* The kernel is done with the snd_tag. Remove its reference. */
|
|
MPASS(cst->flags & EO_SND_TAG_REF);
|
|
cst->flags &= ~EO_SND_TAG_REF;
|
|
|
|
if (cst->ncompl == 0) {
|
|
/*
|
|
* No fw4_ack in flight. Free the tag right away if there are
|
|
* no outstanding credits. Request the firmware to return all
|
|
* credits for the etid otherwise.
|
|
*/
|
|
if (cst->tx_credits == cst->tx_total) {
|
|
cxgbe_rate_tag_free_locked(cst);
|
|
return; /* cst is gone. */
|
|
}
|
|
send_etid_flush_wr(cst);
|
|
}
|
|
mtx_unlock(&cst->lock);
|
|
}
|
|
|
|
void
|
|
cxgbe_ratelimit_query(if_t ifp, struct if_ratelimit_query_results *q)
|
|
{
|
|
struct vi_info *vi = if_getsoftc(ifp);
|
|
struct adapter *sc = vi->adapter;
|
|
|
|
q->rate_table = NULL;
|
|
q->flags = RT_IS_SELECTABLE;
|
|
/*
|
|
* Absolute max limits from the firmware configuration. Practical
|
|
* limits depend on the burstsize, pktsize (if_getmtu(ifp) ultimately) and
|
|
* the card's cclk.
|
|
*/
|
|
q->max_flows = sc->tids.netids;
|
|
q->number_of_rates = sc->params.nsched_cls;
|
|
q->min_segment_burst = 4; /* matches PKTSCHED_BURST in the firmware. */
|
|
|
|
#if 1
|
|
if (chip_id(sc) < CHELSIO_T6) {
|
|
/* Based on testing by rrs@ with a T580 at burstsize = 4. */
|
|
MPASS(q->min_segment_burst == 4);
|
|
q->max_flows = min(4000, q->max_flows);
|
|
} else {
|
|
/* XXX: TBD, carried forward from T5 for now. */
|
|
q->max_flows = min(4000, q->max_flows);
|
|
}
|
|
|
|
/*
|
|
* XXX: tcp_ratelimit.c grabs all available rates on link-up before it
|
|
* even knows whether hw pacing will be used or not. This prevents
|
|
* other consumers like SO_MAX_PACING_RATE or those using cxgbetool or
|
|
* the private ioctls from using any of traffic classes.
|
|
*
|
|
* Underreport the number of rates to tcp_ratelimit so that it doesn't
|
|
* hog all of them. This can be removed if/when tcp_ratelimit switches
|
|
* to making its allocations on first-use rather than link-up. There is
|
|
* nothing wrong with one particular consumer reserving all the classes
|
|
* but it should do so only if it'll actually use hw rate limiting.
|
|
*/
|
|
q->number_of_rates /= 4;
|
|
#endif
|
|
}
|
|
#endif
|