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ethdev: add function to release port in secondary process

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Add driver API rte_eth_release_port_secondary 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.zhang@intel.com>
This commit is contained in:
Qi Zhang 2018-10-16 08:16:27 +08:00 committed by Thomas Monjalon
parent 94d7265976
commit 95f3e8846e
4 changed files with 45 additions and 5 deletions
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17
lib/librte_ethdev/rte_ethdev.c
View File

@ -362,6 +362,18 @@ rte_eth_dev_attach_secondary(const char *name)
return eth_dev;
}
int
rte_eth_dev_release_port_secondary(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)
{
@ -3578,9 +3590,10 @@ rte_eth_dev_destroy(struct rte_eth_dev *ethdev,
return ret;
}
if (rte_eal_process_type() == RTE_PROC_PRIMARY)
rte_free(ethdev->data->dev_private);
if (rte_eal_process_type() != RTE_PROC_PRIMARY)
return rte_eth_dev_release_port_secondary(ethdev);
rte_free(ethdev->data->dev_private);
ethdev->data->dev_private = NULL;
return rte_eth_dev_release_port(ethdev);

16
lib/librte_ethdev/rte_ethdev_driver.h
View File

@ -61,12 +61,26 @@ 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
*/
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_secondary(struct rte_eth_dev *eth_dev);
/**
* @internal
* Release device queues and clear its configuration to force the user

10
lib/librte_ethdev/rte_ethdev_pci.h
View File

@ -135,9 +135,15 @@ rte_eth_dev_pci_allocate(struct rte_pci_device *dev, size_t private_data_size)
static inline void
rte_eth_dev_pci_release(struct rte_eth_dev *eth_dev)
{
if (rte_eal_process_type() == RTE_PROC_PRIMARY)
rte_free(eth_dev->data->dev_private);
if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
eth_dev->device = NULL;
eth_dev->intr_handle = NULL;
rte_eth_dev_release_port_secondary(eth_dev);
return;
}
/* primary process */
rte_free(eth_dev->data->dev_private);
eth_dev->data->dev_private = NULL;
/*

7
lib/librte_ethdev/rte_ethdev_version.map
View File

@ -220,6 +220,13 @@ DPDK_18.08 {
} DPDK_18.05;
DPDK_18.11 {
global:
rte_eth_dev_release_port_secondary;
} DPDK_18.08;
EXPERIMENTAL {
global: