[dpdk-dev] [PATCH v2] net/mlx5: allow multiple probing for representor
Yongseok Koh
yskoh at mellanox.com
Fri Oct 5 20:06:29 CEST 2018
> On Oct 5, 2018, at 4:06 AM, Ophir Munk <ophirmu at mellanox.com> wrote:
>
> Implement probing of a device multiple times, see [1].
> Consecutive probing requests with a devargs string may contain
> repetitive master and representors devices for which eth device should
> be created. If an eth device already exists - silently ignore it.
>
> [1]
> https://patches.dpdk.org/patch/45601/
> ("eal: allow probing a device again")
>
> Signed-off-by: Ophir Munk <ophirmu at mellanox.com>
> ---
Acked-by: Yongseok Koh <yskoh at mellanox.com>
Thanks
> v1:
> Initial release
>
> v2:
> Rebase + code review updates
> https://patches.dpdk.org/patch/45927/
>
> drivers/net/mlx5/mlx5.c | 27 ++++++++++++++++-----------
> 1 file changed, 16 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
> index 9131290..a5a9eca 100644
> --- a/drivers/net/mlx5/mlx5.c
> +++ b/drivers/net/mlx5/mlx5.c
> @@ -693,9 +693,10 @@
> *
> * @return
> * A valid Ethernet device object on success, NULL otherwise and rte_errno
> - * is set. The following error is defined:
> + * is set. The following errors are defined:
> *
> * EBUSY: device is not supposed to be spawned.
> + * EEXIST: device is already spawned
> */
> static struct rte_eth_dev *
> mlx5_dev_spawn(struct rte_device *dpdk_dev,
> @@ -744,6 +745,7 @@
> struct ether_addr mac;
> char name[RTE_ETH_NAME_MAX_LEN];
> int own_domain_id = 0;
> + uint16_t port_id;
> unsigned int i;
>
> /* Determine if this port representor is supposed to be spawned. */
> @@ -766,6 +768,17 @@
> return NULL;
> }
> }
> + /* Build device name. */
> + if (!switch_info->representor)
> + rte_strlcpy(name, dpdk_dev->name, sizeof(name));
> + else
> + snprintf(name, sizeof(name), "%s_representor_%u",
> + dpdk_dev->name, switch_info->port_name);
> + /* check if the device is already spawned */
> + if (rte_eth_dev_get_port_by_name(name, &port_id) == 0) {
> + rte_errno = EEXIST;
> + return NULL;
> + }
> /* Prepare shared data between primary and secondary process. */
> mlx5_prepare_shared_data();
> errno = 0;
> @@ -872,11 +885,6 @@
> DEBUG("ibv_query_device_ex() failed");
> goto error;
> }
> - if (!switch_info->representor)
> - rte_strlcpy(name, dpdk_dev->name, sizeof(name));
> - else
> - snprintf(name, sizeof(name), "%s_representor_%u",
> - dpdk_dev->name, switch_info->port_name);
> DRV_LOG(DEBUG, "naming Ethernet device \"%s\"", name);
> if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
> eth_dev = rte_eth_dev_attach_secondary(name);
> @@ -1306,9 +1314,6 @@ struct mlx5_dev_spawn_data {
> assert(pci_drv == &mlx5_driver);
> errno = 0;
>
> - if (rte_dev_is_probed(&pci_dev->device))
> - return -EEXIST;
> -
> ibv_list = mlx5_glue->get_device_list(&ret);
> if (!ibv_list) {
> rte_errno = errno ? errno : ENOSYS;
> @@ -1418,9 +1423,9 @@ struct mlx5_dev_spawn_data {
> list[i].eth_dev = mlx5_dev_spawn
> (&pci_dev->device, list[i].ibv_dev, vf, &list[i].info);
> if (!list[i].eth_dev) {
> - if (rte_errno != EBUSY)
> + if (rte_errno != EBUSY && rte_errno != EEXIST)
> break;
> - /* Device is disabled, ignore it. */
> + /* Device is disabled or already spawned. Ignore it. */
> continue;
> }
> restore = list[i].eth_dev->data->dev_flags;
> --
> 1.8.3.1
>
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