[dpdk-stable] [PATCH 18.08] net/vmxnet3: fix hot-unplug
Luca Boccassi
bluca at debian.org
Fri Nov 23 15:06:44 CET 2018
[ backported from upstream commit 6c99085d972b5f0fddf9f986ea8907ed5dafd086 ]
The vmxnet3 driver can't call back into dev_close(), and possibly
dev_stop(), in dev_uninit(). When dev_uninit() is called, anything
that those routines would want to clean up has already been released.
Further, for complete cleanup, it is necessary to release any of the
queue resources during dev_close().
This allows a vmxnet3 device to be hot-unplugged without leaking
queues.
Also set RTE_ETH_DEV_CLOSE_REMOVE on close so that the port resources
can be deallocated.
Return EBUSY if remove is called before stop.
Fixes: dfaff37fc46d ("vmxnet3: import new vmxnet3 poll mode driver implementation")
Cc: stable at dpdk.org
Signed-off-by: Brian Russell <brussell at brocade.com>
Signed-off-by: Luca Boccassi <bluca at debian.org>
---
Removed setting RTE_ETH_DEV_CLOSE_REMOVE which was added in 18.11.
drivers/net/vmxnet3/vmxnet3_ethdev.c | 37 ++++++++++++++++++++++------
1 file changed, 30 insertions(+), 7 deletions(-)
diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/vmxnet3_ethdev.c
index 2613cd135..610b8c8ea 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
@@ -355,8 +355,10 @@ eth_vmxnet3_dev_uninit(struct rte_eth_dev *eth_dev)
if (rte_eal_process_type() != RTE_PROC_PRIMARY)
return 0;
- if (hw->adapter_stopped == 0)
- vmxnet3_dev_close(eth_dev);
+ if (hw->adapter_stopped == 0) {
+ PMD_INIT_LOG(DEBUG, "Device has not been closed.");
+ return -EBUSY;
+ }
eth_dev->dev_ops = NULL;
eth_dev->rx_pkt_burst = NULL;
@@ -803,7 +805,7 @@ vmxnet3_dev_stop(struct rte_eth_dev *dev)
PMD_INIT_FUNC_TRACE();
if (hw->adapter_stopped == 1) {
- PMD_INIT_LOG(DEBUG, "Device already closed.");
+ PMD_INIT_LOG(DEBUG, "Device already stopped.");
return;
}
@@ -827,7 +829,6 @@ vmxnet3_dev_stop(struct rte_eth_dev *dev)
/* reset the device */
VMXNET3_WRITE_BAR1_REG(hw, VMXNET3_REG_CMD, VMXNET3_CMD_RESET_DEV);
PMD_INIT_LOG(DEBUG, "Device reset.");
- hw->adapter_stopped = 0;
vmxnet3_dev_clear_queues(dev);
@@ -837,6 +838,30 @@ vmxnet3_dev_stop(struct rte_eth_dev *dev)
link.link_speed = ETH_SPEED_NUM_10G;
link.link_autoneg = ETH_LINK_FIXED;
rte_eth_linkstatus_set(dev, &link);
+
+ hw->adapter_stopped = 1;
+}
+
+static void
+vmxnet3_free_queues(struct rte_eth_dev *dev)
+{
+ int i;
+
+ PMD_INIT_FUNC_TRACE();
+
+ for (i = 0; i < dev->data->nb_rx_queues; i++) {
+ void *rxq = dev->data->rx_queues[i];
+
+ vmxnet3_dev_rx_queue_release(rxq);
+ }
+ dev->data->nb_rx_queues = 0;
+
+ for (i = 0; i < dev->data->nb_tx_queues; i++) {
+ void *txq = dev->data->tx_queues[i];
+
+ vmxnet3_dev_tx_queue_release(txq);
+ }
+ dev->data->nb_tx_queues = 0;
}
/*
@@ -845,12 +870,10 @@ vmxnet3_dev_stop(struct rte_eth_dev *dev)
static void
vmxnet3_dev_close(struct rte_eth_dev *dev)
{
- struct vmxnet3_hw *hw = dev->data->dev_private;
-
PMD_INIT_FUNC_TRACE();
vmxnet3_dev_stop(dev);
- hw->adapter_stopped = 1;
+ vmxnet3_free_queues(dev);
}
static void
--
2.19.1
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