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net/mlx4: fix removal detection of stopped port

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In failsafe device start can be called for ports/devices that
had been plugged out.
The mlx4 PMD detects device removal by listening to the device RMV
events, when the mlx4 port is being stopped, the PMD no longer
listens to these events causing the PMD to stop detecting device
removals.
This patch fixes this issue by moving installation of the interrupt
handler to device configuration, and toggle only the Rx-queue
interrupts on start/stop.

Fixes: a6e8b01c3c ("net/mlx4: compact interrupt functions")
Cc: stable@dpdk.org

Signed-off-by: Moti Haimovsky <motih@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>
This commit is contained in:
Moti Haimovsky 2018-01-29 10:34:37 +02:00 committed by Thomas Monjalon
parent f8ec9e2fff
commit fc1b5ec522
3 changed files with 48 additions and 5 deletions
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10
drivers/net/mlx4/mlx4.c
View File

@ -108,7 +108,13 @@ mlx4_dev_configure(struct rte_eth_dev *dev)
" flow error type %d, cause %p, message: %s",
-ret, strerror(-ret), error.type, error.cause,
error.message ? error.message : "(unspecified)");
goto exit;
}
ret = mlx4_intr_install(priv);
if (ret)
ERROR("%p: interrupt handler installation failed",
(void *)dev);
exit:
return ret;
}
@ -141,7 +147,7 @@ mlx4_dev_start(struct rte_eth_dev *dev)
(void *)dev, strerror(-ret));
goto err;
}
ret = mlx4_intr_install(priv);
ret = mlx4_rxq_intr_enable(priv);
if (ret) {
ERROR("%p: interrupt handler installation failed",
(void *)dev);
@ -187,7 +193,7 @@ mlx4_dev_stop(struct rte_eth_dev *dev)
dev->rx_pkt_burst = mlx4_rx_burst_removed;
rte_wmb();
mlx4_flow_sync(priv, NULL);
mlx4_intr_uninstall(priv);
mlx4_rxq_intr_disable(priv);
mlx4_rss_deinit(priv);
}

2
drivers/net/mlx4/mlx4.h
View File

@ -177,6 +177,8 @@ int mlx4_is_removed(struct rte_eth_dev *dev);
int mlx4_intr_uninstall(struct priv *priv);
int mlx4_intr_install(struct priv *priv);
int mlx4_rxq_intr_enable(struct priv *priv);
void mlx4_rxq_intr_disable(struct priv *priv);
int mlx4_rx_intr_disable(struct rte_eth_dev *dev, uint16_t idx);
int mlx4_rx_intr_enable(struct rte_eth_dev *dev, uint16_t idx);

41
drivers/net/mlx4/mlx4_intr.c
View File

@ -291,7 +291,7 @@ mlx4_intr_uninstall(struct priv *priv)
}
rte_eal_alarm_cancel((void (*)(void *))mlx4_link_status_alarm, priv);
priv->intr_alarm = 0;
mlx4_rx_intr_vec_disable(priv);
mlx4_rxq_intr_disable(priv);
rte_errno = err;
return 0;
}
@ -313,8 +313,6 @@ mlx4_intr_install(struct priv *priv)
int rc;
mlx4_intr_uninstall(priv);
if (intr_conf->rxq && mlx4_rx_intr_vec_enable(priv) < 0)
goto error;
if (intr_conf->lsc | intr_conf->rmv) {
priv->intr_handle.fd = priv->ctx->async_fd;
rc = rte_intr_callback_register(&priv->intr_handle,
@ -395,3 +393,40 @@ mlx4_rx_intr_enable(struct rte_eth_dev *dev, uint16_t idx)
}
return -ret;
}
/**
* Enable datapath interrupts.
*
* @param priv
* Pointer to private structure.
*
* @return
* 0 on success, negative errno value otherwise and rte_errno is set.
*/
int
mlx4_rxq_intr_enable(struct priv *priv)
{
const struct rte_intr_conf *const intr_conf =
&priv->dev->data->dev_conf.intr_conf;
if (intr_conf->rxq && mlx4_rx_intr_vec_enable(priv) < 0)
goto error;
return 0;
error:
return -rte_errno;
}
/**
* Disable datapath interrupts, keeping other interrupts intact.
*
* @param priv
* Pointer to private structure.
*/
void
mlx4_rxq_intr_disable(struct priv *priv)
{
int err = rte_errno; /* Make sure rte_errno remains unchanged. */
mlx4_rx_intr_vec_disable(priv);
rte_errno = err;
}