Wednesday, March 28, 2018 4:54 PM, Declan Doherty:
> Subject: [dpdk-dev][PATCH v6 4/8] ethdev: Add port representor device flag
>
> Add new device flag to specify that ethdev port is a port representor.
> Extend rte_eth_dev_info structure to expose device flags to user which
> enable applications to discover if a port is a representor port.
>
> Signed-off-by: Declan Doherty <declan.dohe...@intel.com>
> ---
> lib/librte_ether/rte_ethdev.c | 1 +
> lib/librte_ether/rte_ethdev.h | 9 ++++++---
> lib/librte_ether/rte_ethdev_representor.h | 3 +++
> 3 files changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
> index c719f84a3..163246433 100644
> --- a/lib/librte_ether/rte_ethdev.c
> +++ b/lib/librte_ether/rte_ethdev.c
> @@ -2399,6 +2399,7 @@ rte_eth_dev_info_get(uint16_t port_id, struct
> rte_eth_dev_info *dev_info)
> dev_info->nb_rx_queues = dev->data->nb_rx_queues;
> dev_info->nb_tx_queues = dev->data->nb_tx_queues;
> dev_info->switch_id = dev->data->switch_id;
> + dev_info->dev_flags = dev->data->dev_flags;
> }
>
> int
> diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
> index dced4fc41..226acc8b1 100644
> --- a/lib/librte_ether/rte_ethdev.h
> +++ b/lib/librte_ether/rte_ethdev.h
> @@ -996,6 +996,7 @@ struct rte_eth_dev_info {
> const char *driver_name; /**< Device Driver name. */
> unsigned int if_index; /**< Index to bound host interface, or 0 if
> none.
> Use if_indextoname() to translate into an interface name. */
> + uint32_t dev_flags; /**< Device flags */
> uint32_t min_rx_bufsize; /**< Minimum size of RX buffer. */
> uint32_t max_rx_pktlen; /**< Maximum configurable length of RX
> pkt. */
> uint16_t max_rx_queues; /**< Maximum number of RX queues. */
> @@ -1229,11 +1230,13 @@ struct rte_eth_dev_owner { };
>
> /** Device supports link state interrupt */
> -#define RTE_ETH_DEV_INTR_LSC 0x0002
> +#define RTE_ETH_DEV_INTR_LSC 0x0002
> /** Device is a bonded slave */
> -#define RTE_ETH_DEV_BONDED_SLAVE 0x0004
> +#define RTE_ETH_DEV_BONDED_SLAVE 0x0004
> /** Device supports device removal interrupt */
> -#define RTE_ETH_DEV_INTR_RMV 0x0008
> +#define RTE_ETH_DEV_INTR_RMV 0x0008
> +/** Device is port representor */
> +#define RTE_ETH_DEV_REPRESENTOR 0x0010
Maybe it is a good time to make some order here.
I understand the decision to use flags instead of bit-field. It is better.
However there is a mix here of device capabilities like : RTE_ETH_DEV_INTR_LSC
and RTE_ETH_DEV_INTR_RMV
And device attributes like : RTE_ETH_DEV_BONDED_SLAVE and
RTE_ETH_DEV_REPRESENTOR.
I don't think they belong together under the genetic name of dev_flags.
Moreover, I am not sure the fact device is bonded slave should be exposed to
the application. It should be internal to ethdev and its port iterators.
Finally I think representor port may need more info now (and in the future),
for example the associated vf id.
For that, I think it is better it to be exposed as a dedicated struct on device
info.
>
> /**
> * @warning
> diff --git a/lib/librte_ether/rte_ethdev_representor.h
> b/lib/librte_ether/rte_ethdev_representor.h
> index cbc1f2855..f3726d0ba 100644
> --- a/lib/librte_ether/rte_ethdev_representor.h
> +++ b/lib/librte_ether/rte_ethdev_representor.h
> @@ -22,6 +22,9 @@ eth_dev_representor_port_init(struct rte_eth_dev
> *ethdev, void *init_params)
> /** representor inherits the switch id of it's base device */
> ethdev->data->switch_id = base_ethdev->data->switch_id;
>
> + /** Set device flags to specify that device is a representor port */
> + ethdev->data->dev_flags |= RTE_ETH_DEV_REPRESENTOR;
Should be set in the PMD, not in ethdev layer.
> +
> return 0;
> }
>
> --
> 2.14.3
