> Currently, if dev_configure is not called or fails to be called, users
> can still call dev_start successfully. So it is necessary to have a flag
> which indicates whether the device is configured, to control whether
> dev_start can be called and eliminate dependency on user invocation order.
>
> The flag stored in "struct rte_eth_dev_data" is more reasonable than
> "enum rte_eth_dev_state". "enum rte_eth_dev_state" is private to the
> primary and secondary processes, and can be independently controlled.
> However, the secondary process does not make resource allocations and
> does not call dev_configure(). These are done by the primary process
> and can be obtained or used by the secondary process. So this patch
> adds a "dev_configured" flag in "rte_eth_dev_data", like "dev_started".
>
> Signed-off-by: Huisong Li <lihuis...@huawei.com>
> ---
> v1 -> v2:
> - adjusting the description of patch.
>
> ---
> lib/ethdev/rte_ethdev.c | 16 ++++++++++++++++
> lib/ethdev/rte_ethdev_core.h | 6 +++++-
> 2 files changed, 21 insertions(+), 1 deletion(-)
>
> diff --git a/lib/ethdev/rte_ethdev.c b/lib/ethdev/rte_ethdev.c
> index c607eab..6540432 100644
> --- a/lib/ethdev/rte_ethdev.c
> +++ b/lib/ethdev/rte_ethdev.c
> @@ -1356,6 +1356,13 @@ rte_eth_dev_configure(uint16_t port_id, uint16_t
> nb_rx_q, uint16_t nb_tx_q,
> return -EBUSY;
> }
>
> + /*
> + * Ensure that "dev_configured" is always 0 each time prepare to do
> + * dev_configure() to avoid any non-anticipated behaviour.
> + * And set to 1 when dev_configure() is executed successfully.
> + */
> + dev->data->dev_configured = 0;
> +
> /* Store original config, as rollback required on failure */
> memcpy(&orig_conf, &dev->data->dev_conf, sizeof(dev->data->dev_conf));
>
> @@ -1606,6 +1613,8 @@ rte_eth_dev_configure(uint16_t port_id, uint16_t
> nb_rx_q, uint16_t nb_tx_q,
> }
>
> rte_ethdev_trace_configure(port_id, nb_rx_q, nb_tx_q, dev_conf, 0);
> + dev->data->dev_configured = 1;
> +
> return 0;
> reset_queues:
> eth_dev_rx_queue_config(dev, 0);
> @@ -1751,6 +1760,13 @@ rte_eth_dev_start(uint16_t port_id)
>
> RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_start, -ENOTSUP);
>
> + if (dev->data->dev_configured == 0) {
> + RTE_ETHDEV_LOG(INFO,
> + "Device with port_id=%"PRIu16" is not configured.\n",
> + port_id);
> + return -EINVAL;
> + }
> +
> if (dev->data->dev_started != 0) {
> RTE_ETHDEV_LOG(INFO,
> "Device with port_id=%"PRIu16" already started\n",
> diff --git a/lib/ethdev/rte_ethdev_core.h b/lib/ethdev/rte_ethdev_core.h
> index 4679d94..edf96de 100644
> --- a/lib/ethdev/rte_ethdev_core.h
> +++ b/lib/ethdev/rte_ethdev_core.h
> @@ -167,7 +167,11 @@ struct rte_eth_dev_data {
> scattered_rx : 1, /**< RX of scattered packets is ON(1) /
> OFF(0) */
> all_multicast : 1, /**< RX all multicast mode ON(1) / OFF(0). */
> dev_started : 1, /**< Device state: STARTED(1) / STOPPED(0).
> */
> - lro : 1; /**< RX LRO is ON(1) / OFF(0) */
> + lro : 1, /**< RX LRO is ON(1) / OFF(0) */
> + dev_configured : 1;
> + /**< Indicates whether the device is configured.
> + * CONFIGURED(1) / NOT CONFIGURED(0).
> + */
> uint8_t rx_queue_state[RTE_MAX_QUEUES_PER_PORT];
> /**< Queues state: HAIRPIN(2) / STARTED(1) / STOPPED(0). */
> uint8_t tx_queue_state[RTE_MAX_QUEUES_PER_PORT];
> --
Acked-by: Konstantin Ananyev <konstantin.anan...@intel.com>
> 2.7.4
