[spp] [PATCH v2 1/6] shared: add dev_attach_by_devargs

[Yasufumi Ogawa]

> SPP uses deprecated APIs removed in DPDK v18.11. Using rte_eth_hotplug_add()
> is recommended instead of rte_eth_dev_attach()[1]. This patch is to add
> dev_attach_by_devargs() to shared directory so that spp_primary, spp_nfv,
> spp_vm and spp_vf can refer this new function.
Hideyuki,

The number of characters per line should be less than 72. It exceeds the 
limitation in 1st and 3rd lines.

Thanks
> 
> [1]https://mails.dpdk.org/archives/dev/2018-October/117115.html
> 
> Signed-off-by: Hideyuki Yamashita <yamashita.hideyuki at po.ntt-tx.co.jp>
> Signed-off-by: Naoki Takada <takada.naoki at lab.ntt.co.jp>
> ---
>   src/shared/common.c | 26 ++++++++++++++++++++++++++
>   src/shared/common.h | 17 +++++++++++++++++
>   2 files changed, 43 insertions(+)
> 
> diff --git a/src/shared/common.c b/src/shared/common.c
> index f1754db..c88ce14 100644
> --- a/src/shared/common.c
> +++ b/src/shared/common.c
> @@ -500,3 +500,29 @@ append_patch_info_json(char *str,
>   
>   	return 0;
>   }
> +
> +/* attach the new device, then store port_id of the device */
> +int
> +dev_attach_by_devargs(const char *devargs, uint16_t *port_id)
> +{
> +	int ret = -1;
> +	struct rte_devargs da;
> +
> +	memset(&da, 0, sizeof(da));
> +
> +	/* parse devargs */
> +	if (rte_devargs_parse(&da, devargs))
> +		return -1;
> +
> +	ret = rte_eal_hotplug_add(da.bus->name, da.name, da.args);
> +	if (ret < 0) {
> +		free(da.args);
> +		return ret;
> +	}
> +
> +	ret = rte_eth_dev_get_port_by_name(da.name, port_id);
> +
> +	free(da.args);
> +
> +	return ret;
> +}
> diff --git a/src/shared/common.h b/src/shared/common.h
> index a5395aa..60514e5 100644
> --- a/src/shared/common.h
> +++ b/src/shared/common.h
> @@ -18,7 +18,9 @@
>   #include <rte_common.h>
>   #include <rte_config.h>
>   #include <rte_eal.h>
> +#include <rte_devargs.h>
>   #include <rte_ethdev.h>
> +#include <rte_ethdev_driver.h>
>   #include <rte_launch.h>
>   #include <rte_lcore.h>
>   #include <rte_log.h>
> @@ -217,4 +219,19 @@ int spp_atoi(const char *str, int *val);
>   
>   #define RTE_LOGTYPE_APP RTE_LOGTYPE_USER1
>   
> +/**
> + * Attach a new Ethernet device specified by arguments.
> + *
> + * @param devargs
> + *  A pointer to a strings array describing the new device
> + *  to be attached. The strings should be a pci address like
> + *  '0000:01:00.0' or virtual device name like 'net_pcap0'.
> + * @param port_id
> + *  A pointer to a port identifier actually attached.
> + * @return
> + *  0 on success and port_id is filled, negative on error
> + */
> +int
> +dev_attach_by_devargs(const char *devargs, uint16_t *port_id);
> +
>   #endif
>