> -----Original Message-----
> From: dev [mailto:dev-boun...@dpdk.org] On Behalf Of Declan Doherty
> Sent: Monday, April 16, 2018 2:06 PM
> To: dev@dpdk.org
> Cc: Adrien Mazarguil <adrien.mazarg...@6wind.com>; Yigit, Ferruh
> <ferruh.yi...@intel.com>; Thomas Monjalon <tho...@monjalon.net>;
> Shahaf Shuler <shah...@mellanox.com>; Doherty, Declan
> <declan.dohe...@intel.com>
> Subject: [dpdk-dev] [PATCH v7 7/9] ethdev: add switch domain allocator
>
> Signed-off-by: Declan Doherty <declan.dohe...@intel.com>
> ---
> lib/librte_ether/rte_ethdev.c | 53
> +++++++++++++++++++++++++++++++++
> lib/librte_ether/rte_ethdev_driver.h | 39 ++++++++++++++++++++++++
> lib/librte_ether/rte_ethdev_version.map | 3 ++
> 3 files changed, 95 insertions(+)
>
> diff --git a/lib/librte_ether/rte_ethdev.c b/lib/librte_ether/rte_ethdev.c
> index a082b211c..d1f95161f 100644
> --- a/lib/librte_ether/rte_ethdev.c
> +++ b/lib/librte_ether/rte_ethdev.c
> @@ -4300,6 +4300,59 @@ rte_eth_devargs_parse_ports(char *str, void *data)
> ð_da->nb_ports, RTE_MAX_ETHPORTS);
> }
>
> +/**
> + * A set of values to describe the possible states of a switch domain.
> + */
> +enum rte_eth_switch_domain_state {
> + RTE_ETH_SWITCH_DOMAIN_UNUSED = 0,
> + RTE_ETH_SWITCH_DOMAIN_ALLOCATED
> +};
> +
> +/**
> + * Array of switch domains available for allocation. Array is sized to
> + * RTE_MAX_ETHPORTS elements as there cannot be more active switch domains
> than
> + * ethdev ports in a single process.
> + */
> +struct rte_eth_dev_switch {
> + enum rte_eth_switch_domain_state state;
> +} rte_eth_switch_domains[RTE_MAX_ETHPORTS];
Probably already discussed before, but if we can't have more than one
switch_id per port,
while we can't use port_id as switch_id?
> +
> +int __rte_experimental
> +rte_eth_switch_domain_alloc(uint16_t *domain_id)
> +{
> + unsigned int i;
> +
> + *domain_id = RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID;
> +
> + for (i = RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID + 1;
> + i < RTE_MAX_ETHPORTS; i++) {
> + if (rte_eth_switch_domains[i].state ==
> + RTE_ETH_SWITCH_DOMAIN_UNUSED) {
> + rte_eth_switch_domains[i].state =
> + RTE_ETH_SWITCH_DOMAIN_ALLOCATED;
> + *domain_id = i;
> + return 0;
> + }
> + }
So all we need for state is just one status bit (occupied/free)?
Wouldn't bitmap do then?
> +
> + return -ENOSPC;
> +}
> +
> +int __rte_experimental
> +rte_eth_switch_domain_free(uint16_t domain_id)
> +{
> + if (domain_id == RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID ||
> + domain_id >= RTE_MAX_ETHPORTS)
> + return -EINVAL;
> +
> + if (rte_eth_switch_domains[domain_id].state !=
> + RTE_ETH_SWITCH_DOMAIN_ALLOCATED)
> + return -EINVAL;
> +
> + rte_eth_switch_domains[domain_id].state = RTE_ETH_SWITCH_DOMAIN_UNUSED;
> +
> + return 0;
> +}
>
> static int
> rte_eth_devargs_parse_representor_ports(char *str, void *data)
> diff --git a/lib/librte_ether/rte_ethdev_driver.h
> b/lib/librte_ether/rte_ethdev_driver.h
> index 3bce5747d..c22fcbde1 100644
> --- a/lib/librte_ether/rte_ethdev_driver.h
> +++ b/lib/librte_ether/rte_ethdev_driver.h
> @@ -188,6 +188,45 @@ rte_eth_linkstatus_get(const struct rte_eth_dev *dev,
> #endif
> }
>
> +/**
> + * @warning
> + * @b EXPERIMENTAL: this API may change without prior notice.
> + *
> + * Allocate an unique switch domain identifier.
> + *
> + * A pool of switch domain identifiers which can be allocated on request.
> This
> + * will enabled devices which support the concept of switch domains to
> request
> + * a switch domain id which is guaranteed to be unique from other devices
> + * running in the same process.
> + *
> + * @param domain_id
> + * switch domain identifier parameter to pass back to application
> + *
> + * @return
> + * Negative errno value on error, 0 on success.
> + */
> +int __rte_experimental
> +rte_eth_switch_domain_alloc(uint16_t *domain_id);
> +
> +/**
> + * @warning
> + * @b EXPERIMENTAL: this API may change without prior notice.
> + *
> + * Free switch domain.
> + *
> + * Return a switch domain identifier to the pool of free identifiers after
> it is
> + * no longer in use by device.
> + *
> + * @param domain_id
> + * switch domain identifier to free
> + *
> + * @return
> + * Negative errno value on error, 0 on success.
> + */
> +int __rte_experimental
> +rte_eth_switch_domain_free(uint16_t domain_id);
> +
> +
>
> /** Generic Ethernet device arguments */
> struct rte_eth_devargs {
> diff --git a/lib/librte_ether/rte_ethdev_version.map
> b/lib/librte_ether/rte_ethdev_version.map
> index 62ecbdb8a..6601ef106 100644
> --- a/lib/librte_ether/rte_ethdev_version.map
> +++ b/lib/librte_ether/rte_ethdev_version.map
> @@ -236,5 +236,8 @@ EXPERIMENTAL {
> rt_eth_devargs_parse;
> rte_eth_dev_create;
> rte_eth_dev_destroy;
> + rte_eth_switch_domain_alloc;
> + rte_eth_switch_domain_free;
> + rte_eth_switch_domains;
>
> } DPDK_18.05;
> --
> 2.14.3
