Add driver API rte_eth_release_port_private to support the case when an ethdev need to be detached on a secondary process. Local state is set to unused and shared data will not be reset so the primary process can still use it.
Signed-off-by: Qi Zhang <qi.z.zh...@intel.com> Reviewed-by: Andrew Rybchenko <arybche...@solarflare.com> Acked-by: Remy Horton <remy.hor...@intel.com> --- lib/librte_ethdev/rte_ethdev.c | 12 ++++++++++++ lib/librte_ethdev/rte_ethdev_driver.h | 16 +++++++++++++++- lib/librte_ethdev/rte_ethdev_pci.h | 8 ++++++++ 3 files changed, 35 insertions(+), 1 deletion(-) diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c index a9977df97..52a97694c 100644 --- a/lib/librte_ethdev/rte_ethdev.c +++ b/lib/librte_ethdev/rte_ethdev.c @@ -359,6 +359,18 @@ rte_eth_dev_attach_secondary(const char *name) } int +rte_eth_dev_release_port_private(struct rte_eth_dev *eth_dev) +{ + if (eth_dev == NULL) + return -EINVAL; + + _rte_eth_dev_callback_process(eth_dev, RTE_ETH_EVENT_DESTROY, NULL); + eth_dev->state = RTE_ETH_DEV_UNUSED; + + return 0; +} + +int rte_eth_dev_release_port(struct rte_eth_dev *eth_dev) { if (eth_dev == NULL) diff --git a/lib/librte_ethdev/rte_ethdev_driver.h b/lib/librte_ethdev/rte_ethdev_driver.h index c9c825e3f..269586d88 100644 --- a/lib/librte_ethdev/rte_ethdev_driver.h +++ b/lib/librte_ethdev/rte_ethdev_driver.h @@ -62,7 +62,7 @@ struct rte_eth_dev *rte_eth_dev_attach_secondary(const char *name); * Release the specified ethdev port. * * @param eth_dev - * The *eth_dev* pointer is the address of the *rte_eth_dev* structure. + * Device to be detached. * @return * - 0 on success, negative on error */ @@ -70,6 +70,20 @@ int rte_eth_dev_release_port(struct rte_eth_dev *eth_dev); /** * @internal + * Release the specified ethdev port in the local process. + * Only set ethdev state to unused, but not reset shared data since + * it assume other processes is still using it. typically it is + * called by a secondary process. + * + * @param eth_dev + * Device to be detached. + * @return + * - 0 on success, negative on error + */ +int rte_eth_dev_release_port_private(struct rte_eth_dev *eth_dev); + +/** + * @internal * Release device queues and clear its configuration to force the user * application to reconfigure it. It is for internal use only. * diff --git a/lib/librte_ethdev/rte_ethdev_pci.h b/lib/librte_ethdev/rte_ethdev_pci.h index 2cfd37274..a46d9e182 100644 --- a/lib/librte_ethdev/rte_ethdev_pci.h +++ b/lib/librte_ethdev/rte_ethdev_pci.h @@ -197,6 +197,14 @@ rte_eth_dev_pci_generic_remove(struct rte_pci_device *pci_dev, if (!eth_dev) return -ENODEV; + /** + * PCI device can only be globally detached directly by a + * primary process. In secondary process, we only need to + * release port. + */ + if (rte_eal_process_type() != RTE_PROC_PRIMARY) + return rte_eth_dev_release_port_private(eth_dev); + if (dev_uninit) { ret = dev_uninit(eth_dev); if (ret) -- 2.13.6