1 files changed, 404 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_rx.c
new file mode 100644
index 000000000000..b860569d4247
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_rx.c
@@ -0,0 +1,404 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2019 Mellanox Technologies.
+
+#include "health.h"
+#include "params.h"
+
+static int mlx5e_query_rq_state(struct mlx5_core_dev *dev, u32 rqn, u8 *state)
+{
+	int outlen = MLX5_ST_SZ_BYTES(query_rq_out);
+	void *out;
+	void *rqc;
+	int err;
+
+	out = kvzalloc(outlen, GFP_KERNEL);
+	if (!out)
+		return -ENOMEM;
+
+	err = mlx5_core_query_rq(dev, rqn, out);
+	if (err)
+		goto out;
+
+	rqc = MLX5_ADDR_OF(query_rq_out, out, rq_context);
+	*state = MLX5_GET(rqc, rqc, state);
+
+out:
+	kvfree(out);
+	return err;
+}
+
+static int mlx5e_wait_for_icosq_flush(struct mlx5e_icosq *icosq)
+{
+	unsigned long exp_time = jiffies + msecs_to_jiffies(2000);
+
+	while (time_before(jiffies, exp_time)) {
+		if (icosq->cc == icosq->pc)
+			return 0;
+
+		msleep(20);
+	}
+
+	netdev_err(icosq->channel->netdev,
+		   "Wait for ICOSQ 0x%x flush timeout (cc = 0x%x, pc = 0x%x)\n",
+		   icosq->sqn, icosq->cc, icosq->pc);
+
+	return -ETIMEDOUT;
+}
+
+static void mlx5e_reset_icosq_cc_pc(struct mlx5e_icosq *icosq)
+{
+	WARN_ONCE(icosq->cc != icosq->pc, "ICOSQ 0x%x: cc (0x%x) != pc (0x%x)\n",
+		  icosq->sqn, icosq->cc, icosq->pc);
+	icosq->cc = 0;
+	icosq->pc = 0;
+}
+
+static int mlx5e_rx_reporter_err_icosq_cqe_recover(void *ctx)
+{
+	struct mlx5_core_dev *mdev;
+	struct mlx5e_icosq *icosq;
+	struct net_device *dev;
+	struct mlx5e_rq *rq;
+	u8 state;
+	int err;
+
+	icosq = ctx;
+	rq = &icosq->channel->rq;
+	mdev = icosq->channel->mdev;
+	dev = icosq->channel->netdev;
+	err = mlx5_core_query_sq_state(mdev, icosq->sqn, &state);
+	if (err) {
+		netdev_err(dev, "Failed to query ICOSQ 0x%x state. err = %d\n",
+			   icosq->sqn, err);
+		goto out;
+	}
+
+	if (state != MLX5_SQC_STATE_ERR)
+		goto out;
+
+	mlx5e_deactivate_rq(rq);
+	err = mlx5e_wait_for_icosq_flush(icosq);
+	if (err)
+		goto out;
+
+	mlx5e_deactivate_icosq(icosq);
+
+	/* At this point, both the rq and the icosq are disabled */
+
+	err = mlx5e_health_sq_to_ready(icosq->channel, icosq->sqn);
+	if (err)
+		goto out;
+
+	mlx5e_reset_icosq_cc_pc(icosq);
+	mlx5e_free_rx_descs(rq);
+	clear_bit(MLX5E_SQ_STATE_RECOVERING, &icosq->state);
+	mlx5e_activate_icosq(icosq);
+	mlx5e_activate_rq(rq);
+
+	rq->stats->recover++;
+	return 0;
+out:
+	clear_bit(MLX5E_SQ_STATE_RECOVERING, &icosq->state);
+	return err;
+}
+
+void mlx5e_reporter_icosq_cqe_err(struct mlx5e_icosq *icosq)
+{
+	struct mlx5e_priv *priv = icosq->channel->priv;
+	char err_str[MLX5E_REPORTER_PER_Q_MAX_LEN];
+	struct mlx5e_err_ctx err_ctx = {};
+
+	err_ctx.ctx = icosq;
+	err_ctx.recover = mlx5e_rx_reporter_err_icosq_cqe_recover;
+	sprintf(err_str, "ERR CQE on ICOSQ: 0x%x", icosq->sqn);
+
+	mlx5e_health_report(priv, priv->rx_reporter, err_str, &err_ctx);
+}
+
+static int mlx5e_rq_to_ready(struct mlx5e_rq *rq, int curr_state)
+{
+	struct net_device *dev = rq->netdev;
+	int err;
+
+	err = mlx5e_modify_rq_state(rq, curr_state, MLX5_RQC_STATE_RST);
+	if (err) {
+		netdev_err(dev, "Failed to move rq 0x%x to reset\n", rq->rqn);
+		return err;
+	}
+	err = mlx5e_modify_rq_state(rq, MLX5_RQC_STATE_RST, MLX5_RQC_STATE_RDY);
+	if (err) {
+		netdev_err(dev, "Failed to move rq 0x%x to ready\n", rq->rqn);
+		return err;
+	}
+
+	return 0;
+}
+
+static int mlx5e_rx_reporter_err_rq_cqe_recover(void *ctx)
+{
+	struct mlx5_core_dev *mdev;
+	struct net_device *dev;
+	struct mlx5e_rq *rq;
+	u8 state;
+	int err;
+
+	rq = ctx;
+	mdev = rq->mdev;
+	dev = rq->netdev;
+	err = mlx5e_query_rq_state(mdev, rq->rqn, &state);
+	if (err) {
+		netdev_err(dev, "Failed to query RQ 0x%x state. err = %d\n",
+			   rq->rqn, err);
+		goto out;
+	}
+
+	if (state != MLX5_RQC_STATE_ERR)
+		goto out;
+
+	mlx5e_deactivate_rq(rq);
+	mlx5e_free_rx_descs(rq);
+
+	err = mlx5e_rq_to_ready(rq, MLX5_RQC_STATE_ERR);
+	if (err)
+		goto out;
+
+	clear_bit(MLX5E_RQ_STATE_RECOVERING, &rq->state);
+	mlx5e_activate_rq(rq);
+	rq->stats->recover++;
+	return 0;
+out:
+	clear_bit(MLX5E_RQ_STATE_RECOVERING, &rq->state);
+	return err;
+}
+
+void mlx5e_reporter_rq_cqe_err(struct mlx5e_rq *rq)
+{
+	struct mlx5e_priv *priv = rq->channel->priv;
+	char err_str[MLX5E_REPORTER_PER_Q_MAX_LEN];
+	struct mlx5e_err_ctx err_ctx = {};
+
+	err_ctx.ctx = rq;
+	err_ctx.recover = mlx5e_rx_reporter_err_rq_cqe_recover;
+	sprintf(err_str, "ERR CQE on RQ: 0x%x", rq->rqn);
+
+	mlx5e_health_report(priv, priv->rx_reporter, err_str, &err_ctx);
+}
+
+static int mlx5e_rx_reporter_timeout_recover(void *ctx)
+{
+	struct mlx5e_icosq *icosq;
+	struct mlx5_eq_comp *eq;
+	struct mlx5e_rq *rq;
+	int err;
+
+	rq = ctx;
+	icosq = &rq->channel->icosq;
+	eq = rq->cq.mcq.eq;
+	err = mlx5e_health_channel_eq_recover(eq, rq->channel);
+	if (err)
+		clear_bit(MLX5E_SQ_STATE_ENABLED, &icosq->state);
+
+	return err;
+}
+
+void mlx5e_reporter_rx_timeout(struct mlx5e_rq *rq)
+{
+	struct mlx5e_icosq *icosq = &rq->channel->icosq;
+	struct mlx5e_priv *priv = rq->channel->priv;
+	char err_str[MLX5E_REPORTER_PER_Q_MAX_LEN];
+	struct mlx5e_err_ctx err_ctx = {};
+
+	err_ctx.ctx = rq;
+	err_ctx.recover = mlx5e_rx_reporter_timeout_recover;
+	sprintf(err_str, "RX timeout on channel: %d, ICOSQ: 0x%x RQ: 0x%x, CQ: 0x%x\n",
+		icosq->channel->ix, icosq->sqn, rq->rqn, rq->cq.mcq.cqn);
+
+	mlx5e_health_report(priv, priv->rx_reporter, err_str, &err_ctx);
+}
+
+static int mlx5e_rx_reporter_recover_from_ctx(struct mlx5e_err_ctx *err_ctx)
+{
+	return err_ctx->recover(err_ctx->ctx);
+}
+
+static int mlx5e_rx_reporter_recover(struct devlink_health_reporter *reporter,
+				     void *context)
+{
+	struct mlx5e_priv *priv = devlink_health_reporter_priv(reporter);
+	struct mlx5e_err_ctx *err_ctx = context;
+
+	return err_ctx ? mlx5e_rx_reporter_recover_from_ctx(err_ctx) :
+			 mlx5e_health_recover_channels(priv);
+}
+
+static int mlx5e_rx_reporter_build_diagnose_output(struct mlx5e_rq *rq,
+						   struct devlink_fmsg *fmsg)
+{
+	struct mlx5e_priv *priv = rq->channel->priv;
+	struct mlx5e_params *params;
+	struct mlx5e_icosq *icosq;
+	u8 icosq_hw_state;
+	int wqes_sz;
+	u8 hw_state;
+	u16 wq_head;
+	int err;
+
+	params = &priv->channels.params;
+	icosq = &rq->channel->icosq;
+	err = mlx5e_query_rq_state(priv->mdev, rq->rqn, &hw_state);
+	if (err)
+		return err;
+
+	err = mlx5_core_query_sq_state(priv->mdev, icosq->sqn, &icosq_hw_state);
+	if (err)
+		return err;
+
+	wqes_sz = mlx5e_rqwq_get_cur_sz(rq);
+	wq_head = params->rq_wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ ?
+		  rq->mpwqe.wq.head : mlx5_wq_cyc_get_head(&rq->wqe.wq);
+
+	err = devlink_fmsg_obj_nest_start(fmsg);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_u32_pair_put(fmsg, "channel ix", rq->channel->ix);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_u32_pair_put(fmsg, "rqn", rq->rqn);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_u8_pair_put(fmsg, "HW state", hw_state);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_u8_pair_put(fmsg, "SW state", rq->state);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_u32_pair_put(fmsg, "posted WQEs", wqes_sz);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_u32_pair_put(fmsg, "cc", wq_head);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_u8_pair_put(fmsg, "ICOSQ HW state", icosq_hw_state);
+	if (err)
+		return err;
+
+	err = mlx5e_reporter_cq_diagnose(&rq->cq, fmsg);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_obj_nest_end(fmsg);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static int mlx5e_rx_reporter_diagnose(struct devlink_health_reporter *reporter,
+				      struct devlink_fmsg *fmsg)
+{
+	struct mlx5e_priv *priv = devlink_health_reporter_priv(reporter);
+	struct mlx5e_params *params = &priv->channels.params;
+	struct mlx5e_rq *generic_rq;
+	u32 rq_stride, rq_sz;
+	int i, err = 0;
+
+	mutex_lock(&priv->state_lock);
+
+	if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
+		goto unlock;
+
+	generic_rq = &priv->channels.c[0]->rq;
+	rq_sz = mlx5e_rqwq_get_size(generic_rq);
+	rq_stride = BIT(mlx5e_mpwqe_get_log_stride_size(priv->mdev, params, NULL));
+
+	err = mlx5e_reporter_named_obj_nest_start(fmsg, "Common config");
+	if (err)
+		goto unlock;
+
+	err = mlx5e_reporter_named_obj_nest_start(fmsg, "RQ");
+	if (err)
+		goto unlock;
+
+	err = devlink_fmsg_u8_pair_put(fmsg, "type", params->rq_wq_type);
+	if (err)
+		goto unlock;
+
+	err = devlink_fmsg_u64_pair_put(fmsg, "stride size", rq_stride);
+	if (err)
+		goto unlock;
+
+	err = devlink_fmsg_u32_pair_put(fmsg, "size", rq_sz);
+	if (err)
+		goto unlock;
+
+	err = mlx5e_reporter_named_obj_nest_end(fmsg);
+	if (err)
+		goto unlock;
+
+	err = mlx5e_reporter_cq_common_diagnose(&generic_rq->cq, 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, "RQs");
+	if (err)
+		goto unlock;
+
+	for (i = 0; i < priv->channels.num; i++) {
+		struct mlx5e_rq *rq = &priv->channels.c[i]->rq;
+
+		err = mlx5e_rx_reporter_build_diagnose_output(rq, fmsg);
+		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 const struct devlink_health_reporter_ops mlx5_rx_reporter_ops = {
+	.name = "rx",
+	.recover = mlx5e_rx_reporter_recover,
+	.diagnose = mlx5e_rx_reporter_diagnose,
+};
+
+#define MLX5E_REPORTER_RX_GRACEFUL_PERIOD 500
+
+int mlx5e_reporter_rx_create(struct mlx5e_priv *priv)
+{
+	struct devlink *devlink = priv_to_devlink(priv->mdev);
+	struct devlink_health_reporter *reporter;
+
+	reporter = devlink_health_reporter_create(devlink,
+						  &mlx5_rx_reporter_ops,
+						  MLX5E_REPORTER_RX_GRACEFUL_PERIOD,
+						  true, priv);
+	if (IS_ERR(reporter)) {
+		netdev_warn(priv->netdev, "Failed to create rx reporter, err = %ld\n",
+			    PTR_ERR(reporter));
+		return PTR_ERR(reporter);
+	}
+	priv->rx_reporter = reporter;
+	return 0;
+}
+
+void mlx5e_reporter_rx_destroy(struct mlx5e_priv *priv)
+{
+	if (!priv->rx_reporter)
+		return;
+
+	devlink_health_reporter_destroy(priv->rx_reporter);
+}