Re: [dpdk-dev] [PATCH] ethdev: add HIGIG2 key field to flow API

[Stephen Hemminger <stephen@networkplumber.org>]

On Mon, 14 Oct 2019 09:59:56 +0530
<kirankumark@marvell.com> wrote:

> +/**
> + * RTE_FLOW_ITEM_TYPE_HIGIG2
> + * Matches higig2 header.
> + */
> +struct rte_higig2_frc {
> +	uint32_t ksop:8;
> +	uint32_t resv:3;
> +	uint32_t mcst:1;
> +	uint32_t tc:4;
> +	uint32_t dst_modid:8;
> +	uint32_t dst_pid:8;
> +	uint32_t src_modid:8;
> +	uint32_t src_pid:8;
> +	uint32_t lbid:8;
> +	uint32_t dp:2;
> +	uint32_t resv1:3;
> +	uint32_t ppd_type:3;
> +} __attribute__((packed));
> +
> +struct rte_higig2_ppt_type0 {
> +	uint32_t dst_t:1;
> +	uint32_t dst_tgid:3;
> +	uint32_t ingress_tagged:1;
> +	uint32_t mirror_only:1;
> +	uint32_t mirror_done:1;
> +	uint32_t mirror:1;
> +	uint32_t res:2;
> +	uint32_t l3:1;
> +	uint32_t label_present:1;
> +	uint32_t vc_label2:4;
> +	uint32_t vc_label1:8;
> +	uint32_t vc_label0:8;
> +	uint32_t vid_high:8;
> +	uint32_t vid_low:8;
> +	uint32_t pfm:2;
> +	uint32_t src_t:1;
> +	uint32_t res1:2;
> +	uint32_t opcode:3;
> +	uint32_t hdr_ext_len:3;
> +	uint32_t res2:5;
> +} __attribute__((packed));
> +
> +struct rte_higig2_ppt_type1 {
> +	uint32_t classification:16;
> +	uint32_t resv:16;
> +	uint32_t vid:16;
> +	uint32_t pfm:2;
> +	uint32_t src_t:1;
> +	uint32_t resv1:2;
> +	uint32_t opcode:3;
> +	uint32_t hdr_ext_len:3;
> +	uint32_t resv2:5;
> +} __attribute__((packed));
> +
> +RTE_STD_C11
> +struct rte_flow_item_higig2_hdr {
> +	struct rte_higig2_frc fcr;
> +	union {
> +		struct rte_higig2_ppt_type0 ppt0;
> +		struct rte_higig2_ppt_type1 ppt1;
> +	};
> +} __attribute__((packed));
> +
> +/** Default mask for RTE_FLOW_ITEM_TYPE_HIGIG2. */
> +#ifndef __cplusplus
> +static const struct rte_flow_item_higig2_hdr rte_flow_item_higig2_hdr_mask = {
> +	.ppt1.classification = 0xffff,
> +	.ppt1.vid = 0xfff,
> +};
> +#endif
> +

Why do all these structures have to be packed. They are all uint32.