[dpdk-dev] [PATCH 1/3 v3] ethdev: add rx offload to drop error packets

[Andrew Rybchenko]

On 10/9/20 4:13 PM, nipun.gupta at nxp.com wrote:
> From: Nipun Gupta <nipun.gupta at nxp.com>
> 
> This change adds a RX offload capability and configuration to
> enable hardware to drop the packets in case of any error in the
> packets such as L3 checksum error or L4 checksum.
> 
> Signed-off-by: Nipun Gupta <nipun.gupta at nxp.com>
> Signed-off-by: Rohit Raj <rohit.raj at nxp.com>
> Reviewed-by: Asaf Penso <asafp at nvidia.com>
> ---
> 
> v3:
>  - Add additional rx_err_drop_offload_capa, which is specific
>    capability flag for RX packets error drop offload. Currently
>    only 'all' error packet drops are enabled, but can be extended
>    to provide capability to drop any specific errors like L1 FCS,
>    L3 Checksum etc.
>  - Added separate config structure to enable the drop configuration.
>  - Updated doc with the new updated option in testbbdev (patch 3/3)
> 
> v2:
>  - Add support in DPAA1 driver (patch 2/3)
>  - Add support and config parameter in testpmd (patch 3/3)
> 
>  lib/librte_ethdev/rte_ethdev.c |  1 +
>  lib/librte_ethdev/rte_ethdev.h | 22 ++++++++++++++++++++++
>  2 files changed, 23 insertions(+)
> 
> diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
> index 48d1333b1..be25e947e 100644
> --- a/lib/librte_ethdev/rte_ethdev.c
> +++ b/lib/librte_ethdev/rte_ethdev.c
> @@ -128,6 +128,7 @@ static const struct {
>  	RTE_RX_OFFLOAD_BIT2STR(SCTP_CKSUM),
>  	RTE_RX_OFFLOAD_BIT2STR(OUTER_UDP_CKSUM),
>  	RTE_RX_OFFLOAD_BIT2STR(RSS_HASH),
> +	RTE_RX_OFFLOAD_BIT2STR(ERR_PKT_DROP),
>  };
>  
>  #undef RTE_RX_OFFLOAD_BIT2STR
> diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethdev.h
> index d2bf74f12..cb968d38a 100644
> --- a/lib/librte_ethdev/rte_ethdev.h
> +++ b/lib/librte_ethdev/rte_ethdev.h
> @@ -1194,6 +1194,16 @@ struct rte_intr_conf {
>  	uint32_t rmv:1;
>  };
>  
> +/**
> + * A structure used to enable/disable error packet drop on RX.
> + */
> +struct rte_rx_err_pkt_drop_conf {
> +	/** enable/disable all RX error packet drop.
> +	 * 0 (default) - disable, 1 enable
> +	 */
> +	uint32_t all:1;

"all" is bad. It should be granular and in the same terms
as mask in dev_info capability.

> +};
> +
>  /**
>   * A structure used to configure an Ethernet port.
>   * Depending upon the RX multi-queue mode, extra advanced
> @@ -1236,6 +1246,8 @@ struct rte_eth_conf {
>  	uint32_t dcb_capability_en;
>  	struct rte_fdir_conf fdir_conf; /**< FDIR configuration. DEPRECATED */
>  	struct rte_intr_conf intr_conf; /**< Interrupt mode configuration. */
> +	struct rte_rx_err_pkt_drop_conf err_pkt_drop_conf;
> +	/**< RX error packet drop configuration. */

Why not per queue?

>  };
>  
>  /**
> @@ -1260,6 +1272,7 @@ struct rte_eth_conf {
>  #define DEV_RX_OFFLOAD_SCTP_CKSUM	0x00020000
>  #define DEV_RX_OFFLOAD_OUTER_UDP_CKSUM  0x00040000
>  #define DEV_RX_OFFLOAD_RSS_HASH		0x00080000
> +#define DEV_RX_OFFLOAD_ERR_PKT_DROP	0x00100000
>  
>  #define DEV_RX_OFFLOAD_CHECKSUM (DEV_RX_OFFLOAD_IPV4_CKSUM | \
>  				 DEV_RX_OFFLOAD_UDP_CKSUM | \
> @@ -1274,6 +1287,13 @@ struct rte_eth_conf {
>   * mentioned in rte_rx_offload_names in rte_ethdev.c file.
>   */
>  
> +/**
> + * RX Error Drop offload config/capabilities of a device. These
> + * are valid only when RX capability DEV_RX_OFFLOAD_ERR_PKT_DROP
> + * is supported by the device.
> + */
> +#define DEV_RX_ERR_PKT_DROP_OFFLOAD_ALL		0x00000001
> +

I strictly dislike "all". It will always be bad defined.
It must be granular.

>  /**
>   * TX offload capabilities of a device.
>   */
> @@ -1411,6 +1431,8 @@ struct rte_eth_dev_info {
>  	/**< Device per-queue RX offload capabilities. */
>  	uint64_t tx_queue_offload_capa;
>  	/**< Device per-queue TX offload capabilities. */
> +	uint64_t rx_err_drop_offload_capa;
> +	/**< RX error packet drop offload capabilities. */
>  	uint16_t reta_size;
>  	/**< Device redirection table size, the total number of entries. */
>  	uint8_t hash_key_size; /**< Hash key size in bytes */
>