430 lines
11 KiB
C
430 lines
11 KiB
C
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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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/* Copyright (C) 2018 Netronome Systems, Inc. */
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#include <linux/bitops.h>
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#include <linux/kernel.h>
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#include <linux/log2.h>
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#include "../nfpcore/nfp_cpp.h"
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#include "../nfpcore/nfp_nffw.h"
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#include "../nfp_app.h"
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#include "../nfp_abi.h"
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#include "../nfp_main.h"
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#include "../nfp_net.h"
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#include "main.h"
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#define NFP_NUM_PRIOS_SYM_NAME "_abi_pci_dscp_num_prio_%u"
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#define NFP_NUM_BANDS_SYM_NAME "_abi_pci_dscp_num_band_%u"
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#define NFP_ACT_MASK_SYM_NAME "_abi_nfd_out_q_actions_%u"
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#define NFP_RED_SUPPORT_SYM_NAME "_abi_nfd_out_red_offload_%u"
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#define NFP_QLVL_SYM_NAME "_abi_nfd_out_q_lvls_%u%s"
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#define NFP_QLVL_STRIDE 16
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#define NFP_QLVL_BLOG_BYTES 0
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#define NFP_QLVL_BLOG_PKTS 4
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#define NFP_QLVL_THRS 8
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#define NFP_QLVL_ACT 12
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#define NFP_QMSTAT_SYM_NAME "_abi_nfdqm%u_stats%s"
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#define NFP_QMSTAT_STRIDE 32
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#define NFP_QMSTAT_NON_STO 0
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#define NFP_QMSTAT_STO 8
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#define NFP_QMSTAT_DROP 16
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#define NFP_QMSTAT_ECN 24
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#define NFP_Q_STAT_SYM_NAME "_abi_nfd_rxq_stats%u%s"
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#define NFP_Q_STAT_STRIDE 16
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#define NFP_Q_STAT_PKTS 0
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#define NFP_Q_STAT_BYTES 8
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#define NFP_NET_ABM_MBOX_CMD NFP_NET_CFG_MBOX_SIMPLE_CMD
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#define NFP_NET_ABM_MBOX_RET NFP_NET_CFG_MBOX_SIMPLE_RET
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#define NFP_NET_ABM_MBOX_DATALEN NFP_NET_CFG_MBOX_SIMPLE_VAL
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#define NFP_NET_ABM_MBOX_RESERVED (NFP_NET_CFG_MBOX_SIMPLE_VAL + 4)
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#define NFP_NET_ABM_MBOX_DATA (NFP_NET_CFG_MBOX_SIMPLE_VAL + 8)
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static int
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nfp_abm_ctrl_stat(struct nfp_abm_link *alink, const struct nfp_rtsym *sym,
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unsigned int stride, unsigned int offset, unsigned int band,
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unsigned int queue, bool is_u64, u64 *res)
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{
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struct nfp_cpp *cpp = alink->abm->app->cpp;
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u64 val, sym_offset;
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unsigned int qid;
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u32 val32;
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int err;
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qid = band * NFP_NET_MAX_RX_RINGS + alink->queue_base + queue;
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sym_offset = qid * stride + offset;
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if (is_u64)
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err = __nfp_rtsym_readq(cpp, sym, 3, 0, sym_offset, &val);
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else
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err = __nfp_rtsym_readl(cpp, sym, 3, 0, sym_offset, &val32);
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if (err) {
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nfp_err(cpp, "RED offload reading stat failed on vNIC %d band %d queue %d (+ %d)\n",
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alink->id, band, queue, alink->queue_base);
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return err;
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}
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*res = is_u64 ? val : val32;
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return 0;
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}
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int __nfp_abm_ctrl_set_q_lvl(struct nfp_abm *abm, unsigned int id, u32 val)
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{
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struct nfp_cpp *cpp = abm->app->cpp;
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u64 sym_offset;
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int err;
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__clear_bit(id, abm->threshold_undef);
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if (abm->thresholds[id] == val)
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return 0;
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sym_offset = id * NFP_QLVL_STRIDE + NFP_QLVL_THRS;
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err = __nfp_rtsym_writel(cpp, abm->q_lvls, 4, 0, sym_offset, val);
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if (err) {
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nfp_err(cpp,
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"RED offload setting level failed on subqueue %d\n",
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id);
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return err;
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}
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abm->thresholds[id] = val;
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return 0;
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}
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int nfp_abm_ctrl_set_q_lvl(struct nfp_abm_link *alink, unsigned int band,
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unsigned int queue, u32 val)
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{
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unsigned int threshold;
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threshold = band * NFP_NET_MAX_RX_RINGS + alink->queue_base + queue;
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return __nfp_abm_ctrl_set_q_lvl(alink->abm, threshold, val);
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}
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int __nfp_abm_ctrl_set_q_act(struct nfp_abm *abm, unsigned int id,
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enum nfp_abm_q_action act)
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{
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struct nfp_cpp *cpp = abm->app->cpp;
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u64 sym_offset;
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int err;
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if (abm->actions[id] == act)
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return 0;
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sym_offset = id * NFP_QLVL_STRIDE + NFP_QLVL_ACT;
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err = __nfp_rtsym_writel(cpp, abm->q_lvls, 4, 0, sym_offset, act);
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if (err) {
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nfp_err(cpp,
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"RED offload setting action failed on subqueue %d\n",
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id);
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return err;
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}
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abm->actions[id] = act;
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return 0;
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}
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int nfp_abm_ctrl_set_q_act(struct nfp_abm_link *alink, unsigned int band,
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unsigned int queue, enum nfp_abm_q_action act)
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{
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unsigned int qid;
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qid = band * NFP_NET_MAX_RX_RINGS + alink->queue_base + queue;
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return __nfp_abm_ctrl_set_q_act(alink->abm, qid, act);
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}
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u64 nfp_abm_ctrl_stat_non_sto(struct nfp_abm_link *alink, unsigned int queue)
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{
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unsigned int band;
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u64 val, sum = 0;
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for (band = 0; band < alink->abm->num_bands; band++) {
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if (nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
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NFP_QMSTAT_STRIDE, NFP_QMSTAT_NON_STO,
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band, queue, true, &val))
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return 0;
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sum += val;
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}
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return sum;
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}
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u64 nfp_abm_ctrl_stat_sto(struct nfp_abm_link *alink, unsigned int queue)
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{
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unsigned int band;
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u64 val, sum = 0;
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for (band = 0; band < alink->abm->num_bands; band++) {
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if (nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
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NFP_QMSTAT_STRIDE, NFP_QMSTAT_STO,
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band, queue, true, &val))
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return 0;
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sum += val;
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}
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return sum;
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}
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static int
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nfp_abm_ctrl_stat_basic(struct nfp_abm_link *alink, unsigned int band,
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unsigned int queue, unsigned int off, u64 *val)
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{
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if (!nfp_abm_has_prio(alink->abm)) {
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if (!band) {
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unsigned int id = alink->queue_base + queue;
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*val = nn_readq(alink->vnic,
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NFP_NET_CFG_RXR_STATS(id) + off);
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} else {
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*val = 0;
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}
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return 0;
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} else {
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return nfp_abm_ctrl_stat(alink, alink->abm->q_stats,
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NFP_Q_STAT_STRIDE, off, band, queue,
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true, val);
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}
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}
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int nfp_abm_ctrl_read_q_stats(struct nfp_abm_link *alink, unsigned int band,
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unsigned int queue, struct nfp_alink_stats *stats)
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{
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int err;
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err = nfp_abm_ctrl_stat_basic(alink, band, queue, NFP_Q_STAT_PKTS,
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&stats->tx_pkts);
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if (err)
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return err;
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err = nfp_abm_ctrl_stat_basic(alink, band, queue, NFP_Q_STAT_BYTES,
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&stats->tx_bytes);
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if (err)
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return err;
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err = nfp_abm_ctrl_stat(alink, alink->abm->q_lvls, NFP_QLVL_STRIDE,
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NFP_QLVL_BLOG_BYTES, band, queue, false,
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&stats->backlog_bytes);
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if (err)
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return err;
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err = nfp_abm_ctrl_stat(alink, alink->abm->q_lvls,
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NFP_QLVL_STRIDE, NFP_QLVL_BLOG_PKTS,
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band, queue, false, &stats->backlog_pkts);
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if (err)
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return err;
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err = nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
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NFP_QMSTAT_STRIDE, NFP_QMSTAT_DROP,
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band, queue, true, &stats->drops);
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if (err)
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return err;
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return nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
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NFP_QMSTAT_STRIDE, NFP_QMSTAT_ECN,
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band, queue, true, &stats->overlimits);
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}
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int nfp_abm_ctrl_read_q_xstats(struct nfp_abm_link *alink,
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unsigned int band, unsigned int queue,
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struct nfp_alink_xstats *xstats)
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{
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int err;
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err = nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
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NFP_QMSTAT_STRIDE, NFP_QMSTAT_DROP,
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band, queue, true, &xstats->pdrop);
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if (err)
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return err;
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return nfp_abm_ctrl_stat(alink, alink->abm->qm_stats,
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NFP_QMSTAT_STRIDE, NFP_QMSTAT_ECN,
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band, queue, true, &xstats->ecn_marked);
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}
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int nfp_abm_ctrl_qm_enable(struct nfp_abm *abm)
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{
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return nfp_mbox_cmd(abm->app->pf, NFP_MBOX_PCIE_ABM_ENABLE,
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NULL, 0, NULL, 0);
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}
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int nfp_abm_ctrl_qm_disable(struct nfp_abm *abm)
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{
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return nfp_mbox_cmd(abm->app->pf, NFP_MBOX_PCIE_ABM_DISABLE,
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NULL, 0, NULL, 0);
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}
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int nfp_abm_ctrl_prio_map_update(struct nfp_abm_link *alink, u32 *packed)
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{
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const u32 cmd = NFP_NET_CFG_MBOX_CMD_PCI_DSCP_PRIOMAP_SET;
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struct nfp_net *nn = alink->vnic;
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unsigned int i;
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int err;
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err = nfp_net_mbox_lock(nn, alink->abm->prio_map_len);
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if (err)
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return err;
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/* Write data_len and wipe reserved */
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nn_writeq(nn, nn->tlv_caps.mbox_off + NFP_NET_ABM_MBOX_DATALEN,
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alink->abm->prio_map_len);
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for (i = 0; i < alink->abm->prio_map_len; i += sizeof(u32))
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nn_writel(nn, nn->tlv_caps.mbox_off + NFP_NET_ABM_MBOX_DATA + i,
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packed[i / sizeof(u32)]);
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err = nfp_net_mbox_reconfig_and_unlock(nn, cmd);
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if (err)
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nfp_err(alink->abm->app->cpp,
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"setting DSCP -> VQ map failed with error %d\n", err);
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return err;
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}
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static int nfp_abm_ctrl_prio_check_params(struct nfp_abm_link *alink)
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{
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struct nfp_abm *abm = alink->abm;
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struct nfp_net *nn = alink->vnic;
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unsigned int min_mbox_sz;
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if (!nfp_abm_has_prio(alink->abm))
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return 0;
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min_mbox_sz = NFP_NET_ABM_MBOX_DATA + alink->abm->prio_map_len;
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if (nn->tlv_caps.mbox_len < min_mbox_sz) {
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nfp_err(abm->app->pf->cpp, "vNIC mailbox too small for prio offload: %u, need: %u\n",
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nn->tlv_caps.mbox_len, min_mbox_sz);
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return -EINVAL;
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}
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return 0;
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}
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int nfp_abm_ctrl_read_params(struct nfp_abm_link *alink)
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{
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alink->queue_base = nn_readl(alink->vnic, NFP_NET_CFG_START_RXQ);
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alink->queue_base /= alink->vnic->stride_rx;
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return nfp_abm_ctrl_prio_check_params(alink);
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}
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static unsigned int nfp_abm_ctrl_prio_map_size(struct nfp_abm *abm)
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{
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unsigned int size;
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size = roundup_pow_of_two(order_base_2(abm->num_bands));
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size = DIV_ROUND_UP(size * abm->num_prios, BITS_PER_BYTE);
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size = round_up(size, sizeof(u32));
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return size;
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}
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static const struct nfp_rtsym *
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nfp_abm_ctrl_find_rtsym(struct nfp_pf *pf, const char *name, unsigned int size)
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{
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const struct nfp_rtsym *sym;
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sym = nfp_rtsym_lookup(pf->rtbl, name);
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if (!sym) {
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nfp_err(pf->cpp, "Symbol '%s' not found\n", name);
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return ERR_PTR(-ENOENT);
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}
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if (nfp_rtsym_size(sym) != size) {
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nfp_err(pf->cpp,
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"Symbol '%s' wrong size: expected %u got %llu\n",
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name, size, nfp_rtsym_size(sym));
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return ERR_PTR(-EINVAL);
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||
|
|
}
|
||
|
|
|
||
|
|
return sym;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct nfp_rtsym *
|
||
|
|
nfp_abm_ctrl_find_q_rtsym(struct nfp_abm *abm, const char *name_fmt,
|
||
|
|
size_t size)
|
||
|
|
{
|
||
|
|
char pf_symbol[64];
|
||
|
|
|
||
|
|
size = array3_size(size, abm->num_bands, NFP_NET_MAX_RX_RINGS);
|
||
|
|
snprintf(pf_symbol, sizeof(pf_symbol), name_fmt,
|
||
|
|
abm->pf_id, nfp_abm_has_prio(abm) ? "_per_band" : "");
|
||
|
|
|
||
|
|
return nfp_abm_ctrl_find_rtsym(abm->app->pf, pf_symbol, size);
|
||
|
|
}
|
||
|
|
|
||
|
|
int nfp_abm_ctrl_find_addrs(struct nfp_abm *abm)
|
||
|
|
{
|
||
|
|
struct nfp_pf *pf = abm->app->pf;
|
||
|
|
const struct nfp_rtsym *sym;
|
||
|
|
int res;
|
||
|
|
|
||
|
|
abm->pf_id = nfp_cppcore_pcie_unit(pf->cpp);
|
||
|
|
|
||
|
|
/* Check if Qdisc offloads are supported */
|
||
|
|
res = nfp_pf_rtsym_read_optional(pf, NFP_RED_SUPPORT_SYM_NAME, 1);
|
||
|
|
if (res < 0)
|
||
|
|
return res;
|
||
|
|
abm->red_support = res;
|
||
|
|
|
||
|
|
/* Read count of prios and prio bands */
|
||
|
|
res = nfp_pf_rtsym_read_optional(pf, NFP_NUM_BANDS_SYM_NAME, 1);
|
||
|
|
if (res < 0)
|
||
|
|
return res;
|
||
|
|
abm->num_bands = res;
|
||
|
|
|
||
|
|
res = nfp_pf_rtsym_read_optional(pf, NFP_NUM_PRIOS_SYM_NAME, 1);
|
||
|
|
if (res < 0)
|
||
|
|
return res;
|
||
|
|
abm->num_prios = res;
|
||
|
|
|
||
|
|
/* Read available actions */
|
||
|
|
res = nfp_pf_rtsym_read_optional(pf, NFP_ACT_MASK_SYM_NAME,
|
||
|
|
BIT(NFP_ABM_ACT_MARK_DROP));
|
||
|
|
if (res < 0)
|
||
|
|
return res;
|
||
|
|
abm->action_mask = res;
|
||
|
|
|
||
|
|
abm->prio_map_len = nfp_abm_ctrl_prio_map_size(abm);
|
||
|
|
abm->dscp_mask = GENMASK(7, 8 - order_base_2(abm->num_prios));
|
||
|
|
|
||
|
|
/* Check values are sane, U16_MAX is arbitrarily chosen as max */
|
||
|
|
if (!is_power_of_2(abm->num_bands) || !is_power_of_2(abm->num_prios) ||
|
||
|
|
abm->num_bands > U16_MAX || abm->num_prios > U16_MAX ||
|
||
|
|
(abm->num_bands == 1) != (abm->num_prios == 1)) {
|
||
|
|
nfp_err(pf->cpp,
|
||
|
|
"invalid priomap description num bands: %u and num prios: %u\n",
|
||
|
|
abm->num_bands, abm->num_prios);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Find level and stat symbols */
|
||
|
|
if (!abm->red_support)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
sym = nfp_abm_ctrl_find_q_rtsym(abm, NFP_QLVL_SYM_NAME,
|
||
|
|
NFP_QLVL_STRIDE);
|
||
|
|
if (IS_ERR(sym))
|
||
|
|
return PTR_ERR(sym);
|
||
|
|
abm->q_lvls = sym;
|
||
|
|
|
||
|
|
sym = nfp_abm_ctrl_find_q_rtsym(abm, NFP_QMSTAT_SYM_NAME,
|
||
|
|
NFP_QMSTAT_STRIDE);
|
||
|
|
if (IS_ERR(sym))
|
||
|
|
return PTR_ERR(sym);
|
||
|
|
abm->qm_stats = sym;
|
||
|
|
|
||
|
|
if (nfp_abm_has_prio(abm)) {
|
||
|
|
sym = nfp_abm_ctrl_find_q_rtsym(abm, NFP_Q_STAT_SYM_NAME,
|
||
|
|
NFP_Q_STAT_STRIDE);
|
||
|
|
if (IS_ERR(sym))
|
||
|
|
return PTR_ERR(sym);
|
||
|
|
abm->q_stats = sym;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|