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|
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) 2019 Mellanox Technologies. */
#include "health.h"
static int mlx5e_wait_for_sq_flush(struct mlx5e_txqsq *sq)
{
unsigned long exp_time = jiffies + msecs_to_jiffies(2000);
while (time_before(jiffies, exp_time)) {
if (sq->cc == sq->pc)
return 0;
msleep(20);
}
netdev_err(sq->channel->netdev,
"Wait for SQ 0x%x flush timeout (sq cc = 0x%x, sq pc = 0x%x)\n",
sq->sqn, sq->cc, sq->pc);
return -ETIMEDOUT;
}
static void mlx5e_reset_txqsq_cc_pc(struct mlx5e_txqsq *sq)
{
WARN_ONCE(sq->cc != sq->pc,
"SQ 0x%x: cc (0x%x) != pc (0x%x)\n",
sq->sqn, sq->cc, sq->pc);
sq->cc = 0;
sq->dma_fifo_cc = 0;
sq->pc = 0;
}
static int mlx5e_tx_reporter_err_cqe_recover(void *ctx)
{
struct mlx5_core_dev *mdev;
struct net_device *dev;
struct mlx5e_txqsq *sq;
u8 state;
int err;
sq = ctx;
mdev = sq->channel->mdev;
dev = sq->channel->netdev;
if (!test_bit(MLX5E_SQ_STATE_RECOVERING, &sq->state))
return 0;
err = mlx5_core_query_sq_state(mdev, sq->sqn, &state);
if (err) {
netdev_err(dev, "Failed to query SQ 0x%x state. err = %d\n",
sq->sqn, err);
goto out;
}
if (state != MLX5_SQC_STATE_ERR)
goto out;
mlx5e_tx_disable_queue(sq->txq);
err = mlx5e_wait_for_sq_flush(sq);
if (err)
goto out;
/* At this point, no new packets will arrive from the stack as TXQ is
* marked with QUEUE_STATE_DRV_XOFF. In addition, NAPI cleared all
* pending WQEs. SQ can safely reset the SQ.
*/
err = mlx5e_health_sq_to_ready(sq->channel, sq->sqn);
if (err)
goto out;
mlx5e_reset_txqsq_cc_pc(sq);
sq->stats->recover++;
clear_bit(MLX5E_SQ_STATE_RECOVERING, &sq->state);
mlx5e_activate_txqsq(sq);
return 0;
out:
clear_bit(MLX5E_SQ_STATE_RECOVERING, &sq->state);
return err;
}
static int mlx5e_tx_reporter_timeout_recover(void *ctx)
{
struct mlx5_eq_comp *eq;
struct mlx5e_txqsq *sq;
int err;
sq = ctx;
eq = sq->cq.mcq.eq;
err = mlx5e_health_channel_eq_recover(eq, sq->channel);
if (err)
clear_bit(MLX5E_SQ_STATE_ENABLED, &sq->state);
return err;
}
/* state lock cannot be grabbed within this function.
* It can cause a dead lock or a read-after-free.
*/
static int mlx5e_tx_reporter_recover_from_ctx(struct mlx5e_err_ctx *err_ctx)
{
return err_ctx->recover(err_ctx->ctx);
}
static int mlx5e_tx_reporter_recover(struct devlink_health_reporter *reporter,
void *context,
struct netlink_ext_ack *extack)
{
struct mlx5e_priv *priv = devlink_health_reporter_priv(reporter);
struct mlx5e_err_ctx *err_ctx = context;
return err_ctx ? mlx5e_tx_reporter_recover_from_ctx(err_ctx) :
mlx5e_health_recover_channels(priv);
}
static int
mlx5e_tx_reporter_build_diagnose_output(struct devlink_fmsg *fmsg,
struct mlx5e_txqsq *sq, int tc)
{
struct mlx5e_priv *priv = sq->channel->priv;
bool stopped = netif_xmit_stopped(sq->txq);
u8 state;
int err;
err = mlx5_core_query_sq_state(priv->mdev, sq->sqn, &state);
if (err)
return err;
err = devlink_fmsg_obj_nest_start(fmsg);
if (err)
return err;
err = devlink_fmsg_u32_pair_put(fmsg, "channel ix", sq->ch_ix);
if (err)
return err;
err = devlink_fmsg_u32_pair_put(fmsg, "tc", tc);
if (err)
return err;
err = devlink_fmsg_u32_pair_put(fmsg, "txq ix", sq->txq_ix);
if (err)
return err;
err = devlink_fmsg_u32_pair_put(fmsg, "sqn", sq->sqn);
if (err)
return err;
err = devlink_fmsg_u8_pair_put(fmsg, "HW state", state);
if (err)
return err;
err = devlink_fmsg_bool_pair_put(fmsg, "stopped", stopped);
if (err)
return err;
err = devlink_fmsg_u32_pair_put(fmsg, "cc", sq->cc);
if (err)
return err;
err = devlink_fmsg_u32_pair_put(fmsg, "pc", sq->pc);
if (err)
return err;
err = mlx5e_reporter_cq_diagnose(&sq->cq, fmsg);
if (err)
return err;
err = devlink_fmsg_obj_nest_end(fmsg);
if (err)
return err;
return 0;
}
static int mlx5e_tx_reporter_diagnose(struct devlink_health_reporter *reporter,
struct devlink_fmsg *fmsg,
struct netlink_ext_ack *extack)
{
struct mlx5e_priv *priv = devlink_health_reporter_priv(reporter);
struct mlx5e_txqsq *generic_sq = priv->txq2sq[0];
u32 sq_stride, sq_sz;
int i, tc, err = 0;
mutex_lock(&priv->state_lock);
if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
goto unlock;
sq_sz = mlx5_wq_cyc_get_size(&generic_sq->wq);
sq_stride = MLX5_SEND_WQE_BB;
err = mlx5e_reporter_named_obj_nest_start(fmsg, "Common Config");
if (err)
goto unlock;
err = mlx5e_reporter_named_obj_nest_start(fmsg, "SQ");
if (err)
goto unlock;
err = devlink_fmsg_u64_pair_put(fmsg, "stride size", sq_stride);
if (err)
goto unlock;
err = devlink_fmsg_u32_pair_put(fmsg, "size", sq_sz);
if (err)
goto unlock;
err = mlx5e_reporter_cq_common_diagnose(&generic_sq->cq, fmsg);
if (err)
goto unlock;
err = mlx5e_reporter_named_obj_nest_end(fmsg);
if (err)
goto unlock;
err = mlx5e_reporter_named_obj_nest_end(fmsg);
if (err)
goto unlock;
err = devlink_fmsg_arr_pair_nest_start(fmsg, "SQs");
if (err)
goto unlock;
for (i = 0; i < priv->channels.num; i++) {
struct mlx5e_channel *c = priv->channels.c[i];
for (tc = 0; tc < priv->channels.params.num_tc; tc++) {
struct mlx5e_txqsq *sq = &c->sq[tc];
err = mlx5e_tx_reporter_build_diagnose_output(fmsg, sq, tc);
if (err)
goto unlock;
}
}
err = devlink_fmsg_arr_pair_nest_end(fmsg);
if (err)
goto unlock;
unlock:
mutex_unlock(&priv->state_lock);
return err;
}
static int mlx5e_tx_reporter_dump_sq(struct mlx5e_priv *priv, struct devlink_fmsg *fmsg,
void *ctx)
{
struct mlx5_rsc_key key = {};
struct mlx5e_txqsq *sq = ctx;
int err;
if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
return 0;
err = mlx5e_reporter_named_obj_nest_start(fmsg, "SX Slice");
if (err)
return err;
key.size = PAGE_SIZE;
key.rsc = MLX5_SGMT_TYPE_SX_SLICE_ALL;
err = mlx5e_health_rsc_fmsg_dump(priv, &key, fmsg);
if (err)
return err;
err = mlx5e_reporter_named_obj_nest_end(fmsg);
if (err)
return err;
err = mlx5e_reporter_named_obj_nest_start(fmsg, "SQ");
if (err)
return err;
err = mlx5e_reporter_named_obj_nest_start(fmsg, "QPC");
if (err)
return err;
key.rsc = MLX5_SGMT_TYPE_FULL_QPC;
key.index1 = sq->sqn;
key.num_of_obj1 = 1;
err = mlx5e_health_rsc_fmsg_dump(priv, &key, fmsg);
if (err)
return err;
err = mlx5e_reporter_named_obj_nest_end(fmsg);
if (err)
return err;
err = mlx5e_reporter_named_obj_nest_start(fmsg, "send_buff");
if (err)
return err;
key.rsc = MLX5_SGMT_TYPE_SND_BUFF;
key.num_of_obj2 = MLX5_RSC_DUMP_ALL;
err = mlx5e_health_rsc_fmsg_dump(priv, &key, fmsg);
if (err)
return err;
err = mlx5e_reporter_named_obj_nest_end(fmsg);
if (err)
return err;
return mlx5e_reporter_named_obj_nest_end(fmsg);
}
static int mlx5e_tx_reporter_dump_all_sqs(struct mlx5e_priv *priv,
struct devlink_fmsg *fmsg)
{
struct mlx5_rsc_key key = {};
int i, tc, err;
if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
return 0;
err = mlx5e_reporter_named_obj_nest_start(fmsg, "SX Slice");
if (err)
return err;
key.size = PAGE_SIZE;
key.rsc = MLX5_SGMT_TYPE_SX_SLICE_ALL;
err = mlx5e_health_rsc_fmsg_dump(priv, &key, fmsg);
if (err)
return err;
err = mlx5e_reporter_named_obj_nest_end(fmsg);
if (err)
return err;
err = devlink_fmsg_arr_pair_nest_start(fmsg, "SQs");
if (err)
return err;
for (i = 0; i < priv->channels.num; i++) {
struct mlx5e_channel *c = priv->channels.c[i];
for (tc = 0; tc < priv->channels.params.num_tc; tc++) {
struct mlx5e_txqsq *sq = &c->sq[tc];
err = mlx5e_health_queue_dump(priv, fmsg, sq->sqn, "SQ");
if (err)
return err;
}
}
return devlink_fmsg_arr_pair_nest_end(fmsg);
}
static int mlx5e_tx_reporter_dump_from_ctx(struct mlx5e_priv *priv,
struct mlx5e_err_ctx *err_ctx,
struct devlink_fmsg *fmsg)
{
return err_ctx->dump(priv, fmsg, err_ctx->ctx);
}
static int mlx5e_tx_reporter_dump(struct devlink_health_reporter *reporter,
struct devlink_fmsg *fmsg, void *context,
struct netlink_ext_ack *extack)
{
struct mlx5e_priv *priv = devlink_health_reporter_priv(reporter);
struct mlx5e_err_ctx *err_ctx = context;
return err_ctx ? mlx5e_tx_reporter_dump_from_ctx(priv, err_ctx, fmsg) :
mlx5e_tx_reporter_dump_all_sqs(priv, fmsg);
}
void mlx5e_reporter_tx_err_cqe(struct mlx5e_txqsq *sq)
{
struct mlx5e_priv *priv = sq->channel->priv;
char err_str[MLX5E_REPORTER_PER_Q_MAX_LEN];
struct mlx5e_err_ctx err_ctx = {};
err_ctx.ctx = sq;
err_ctx.recover = mlx5e_tx_reporter_err_cqe_recover;
err_ctx.dump = mlx5e_tx_reporter_dump_sq;
snprintf(err_str, sizeof(err_str), "ERR CQE on SQ: 0x%x", sq->sqn);
mlx5e_health_report(priv, priv->tx_reporter, err_str, &err_ctx);
}
int mlx5e_reporter_tx_timeout(struct mlx5e_txqsq *sq)
{
struct mlx5e_priv *priv = sq->channel->priv;
char err_str[MLX5E_REPORTER_PER_Q_MAX_LEN];
struct mlx5e_err_ctx err_ctx = {};
err_ctx.ctx = sq;
err_ctx.recover = mlx5e_tx_reporter_timeout_recover;
err_ctx.dump = mlx5e_tx_reporter_dump_sq;
snprintf(err_str, sizeof(err_str),
"TX timeout on queue: %d, SQ: 0x%x, CQ: 0x%x, SQ Cons: 0x%x SQ Prod: 0x%x, usecs since last trans: %u",
sq->channel->ix, sq->sqn, sq->cq.mcq.cqn, sq->cc, sq->pc,
jiffies_to_usecs(jiffies - sq->txq->trans_start));
return mlx5e_health_report(priv, priv->tx_reporter, err_str, &err_ctx);
}
static const struct devlink_health_reporter_ops mlx5_tx_reporter_ops = {
.name = "tx",
.recover = mlx5e_tx_reporter_recover,
.diagnose = mlx5e_tx_reporter_diagnose,
.dump = mlx5e_tx_reporter_dump,
};
#define MLX5_REPORTER_TX_GRACEFUL_PERIOD 500
int mlx5e_reporter_tx_create(struct mlx5e_priv *priv)
{
struct devlink_health_reporter *reporter;
struct mlx5_core_dev *mdev = priv->mdev;
struct devlink *devlink;
devlink = priv_to_devlink(mdev);
reporter =
devlink_health_reporter_create(devlink, &mlx5_tx_reporter_ops,
MLX5_REPORTER_TX_GRACEFUL_PERIOD,
priv);
if (IS_ERR(reporter)) {
netdev_warn(priv->netdev,
"Failed to create tx reporter, err = %ld\n",
PTR_ERR(reporter));
return PTR_ERR(reporter);
}
priv->tx_reporter = reporter;
return 0;
}
void mlx5e_reporter_tx_destroy(struct mlx5e_priv *priv)
{
if (!priv->tx_reporter)
return;
devlink_health_reporter_destroy(priv->tx_reporter);
}
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