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dpdk: fix crash with chelsio pmd

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cxgbe PMD initializes its control channel as part of dev_configure(),
and trying to get link status prior to it will lead to a crash.

DPDK documentation loosely hints that we should not call any device
function before dev_start(), call link_state() only for the relevant
PMDs.

From DPDK API documentation:
The functions exported by the application Ethernet API to setup a device
designated by its port identifier must be invoked in the following
order:
    rte_eth_dev_configure()
    rte_eth_tx_queue_setup()
    rte_eth_rx_queue_setup()
    rte_eth_dev_start()
Then, the network application can invoke, in any order, the functions
exported by the Ethernet API to get the MAC address of a given device,
to get the speed and the status of a device physical link, to
receive/transmit [burst of] packets, and so on.

Type: fix

Change-Id: I12d2ab4d84e6bd72a9f695447e86f3222929c804
Signed-off-by: Benoît Ganne <bganne@cisco.com>
(cherry picked from commit 31eb471d0cb0105ab74ee637028f4ab3cc00cf2a)
This commit is contained in:
Benoît Ganne
2020-05-13 14:48:01 +02:00
committed by Andrew Yourtchenko
parent 8563b52376
commit d8c4326aae
1 changed files with 12 additions and 6 deletions
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18
src/plugins/dpdk/device/init.c
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@ -279,7 +279,6 @@ dpdk_lib_init (dpdk_main_t * dm)
int vlan_off;
struct rte_eth_dev_info dev_info;
struct rte_pci_device *pci_dev;
struct rte_eth_link l;
dpdk_portid_t next_port_id;
dpdk_device_config_t *devconf = 0;
vlib_pci_addr_t pci_addr;
@ -288,7 +287,6 @@ dpdk_lib_init (dpdk_main_t * dm)
if (!rte_eth_dev_is_valid_port(i))
continue;
rte_eth_link_get_nowait (i, &l);
rte_eth_dev_info_get (i, &dev_info);
if (dev_info.device == 0)
@ -504,9 +502,13 @@ dpdk_lib_init (dpdk_main_t * dm)
/* Cisco VIC */
case VNET_DPDK_PMD_ENIC:
xd->port_type = port_type_from_link_speed (l.link_speed);
if (dm->conf->enable_tcp_udp_checksum)
dpdk_enable_l4_csum_offload (xd);
{
struct rte_eth_link l;
rte_eth_link_get_nowait (i, &l);
xd->port_type = port_type_from_link_speed (l.link_speed);
if (dm->conf->enable_tcp_udp_checksum)
dpdk_enable_l4_csum_offload (xd);
}
break;
/* Intel Red Rock Canyon */
@ -551,7 +553,11 @@ dpdk_lib_init (dpdk_main_t * dm)
break;
case VNET_DPDK_PMD_NETVSC:
xd->port_type = port_type_from_link_speed (l.link_speed);
{
struct rte_eth_link l;
rte_eth_link_get_nowait (i, &l);
xd->port_type = port_type_from_link_speed (l.link_speed);
}
break;
default: