Re: [dpdk-dev] [PATCH 3/3 v4] app/testpmd: support hardware offload to drop error packets

[Dharmik Thakkar <Dharmik.Thakkar@arm.com>]

Hi Nipun,

Some nits. Looks good otherwise.

> On Oct 15, 2020, at 8:23 AM, Nipun.gupta@nxp.com <nipun.gupta@nxp.com> wrote:
> 
> From: Nipun Gupta <nipun.gupta@nxp.com>
> 
> With DEV_RX_OFFLOAD_ERR_PKT_DROP now defined as an offload
> capability, and separate RTE_DEV_RX_ERR_PKT_DROP_OFFLOAD_ALL
> capability to drop all error packets in hardware, testpmd
> showcases this with a new added configuration option
> 'enable-hw-drop-err-all'.
> 
> Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
> ---
> app/test-pmd/config.c                 | 35 +++++++++++++++++++++
> app/test-pmd/parameters.c             |  7 +++++
> app/test-pmd/testpmd.c                |  8 +++++
> app/test-pmd/testpmd.h                |  1 +
> doc/guides/nics/features.rst          | 44 +++++++++++++++++++++++++++
> doc/guides/testpmd_app_ug/run_app.rst |  4 +++
> 6 files changed, 99 insertions(+)
> 
> diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
> index e73dc66c8..14ef4e468 100644
> --- a/app/test-pmd/config.c
> +++ b/app/test-pmd/config.c
> @@ -1027,6 +1027,41 @@ port_offload_cap_display(portid_t port_id)
> 			printf("off\n");
> 	}
> 
> +	if (dev_info.rx_offload_capa & DEV_RX_OFFLOAD_ERR_PKT_DROP) {
> +		if (dev_info.rx_err_drop_offload_capa &
> +			RTE_DEV_RX_ERR_PKT_DROP_OFFLOAD_L1_FCS) {
> +			printf("RX L1 FCS Error pkt drop:      ");
> +			if (ports[port_id].dev_conf.err_pkt_drop_conf.l1_fcs)
> +				printf("on\n");
> +			else
> +				printf("off\n");
> +		}
> +		if (dev_info.rx_err_drop_offload_capa &
> +			RTE_DEV_RX_ERR_PKT_DROP_OFFLOAD_L3_CSUM) {
> +			printf("RX L3 Csum Error pkt drop:     ");
> +			if (ports[port_id].dev_conf.err_pkt_drop_conf.l3_csum)
> +				printf("on\n");
> +			else
> +				printf("off\n");
> +		}
> +		if (dev_info.rx_err_drop_offload_capa &
> +			RTE_DEV_RX_ERR_PKT_DROP_OFFLOAD_L4_CSUM) {
> +			printf("RX L4 Csum Error pkt drop:     ");
> +			if (ports[port_id].dev_conf.err_pkt_drop_conf.l4_csum)
> +				printf("on\n");
> +			else
> +				printf("off\n");
> +		}
> +		if (dev_info.rx_err_drop_offload_capa &
> +			RTE_DEV_RX_ERR_PKT_DROP_OFFLOAD_ALL) {
> +			printf("RX all Error pkt drop:         ");
> +			if (ports[port_id].dev_conf.err_pkt_drop_conf.all)
> +				printf("on\n");
> +			else
> +				printf("off\n");
> +		}
> +	}
> +
> 	if (dev_info.tx_offload_capa & DEV_TX_OFFLOAD_VLAN_INSERT) {
> 		printf("VLAN insert:                   ");
> 		if (ports[port_id].dev_conf.txmode.offloads &
> diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c
> index 1ead59579..508612426 100644
> --- a/app/test-pmd/parameters.c
> +++ b/app/test-pmd/parameters.c
> @@ -142,6 +142,7 @@ usage(char* progname)
> 	printf("  --enable-hw-vlan-strip: enable hardware vlan strip.\n");
> 	printf("  --enable-hw-vlan-extend: enable hardware vlan extend.\n");
> 	printf("  --enable-hw-qinq-strip: enable hardware qinq strip.\n");
> +	printf("  --enable-hw-drop-err-all: enable hardware packet drop for all error packets.\n");
> 	printf("  --enable-drop-en: enable per queue packet drop.\n");
> 	printf("  --disable-rss: disable rss.\n");
> 	printf("  --port-topology=<paired|chained|loop>: set port topology (paired "
> @@ -631,6 +632,7 @@ launch_args_parse(int argc, char** argv)
> 		{ "enable-hw-vlan-strip",       0, 0, 0 },
> 		{ "enable-hw-vlan-extend",      0, 0, 0 },
> 		{ "enable-hw-qinq-strip",       0, 0, 0 },
> +		{ "enable-hw-drop-err-all",     0, 0, 0 },
> 		{ "enable-drop-en",            0, 0, 0 },
> 		{ "disable-rss",                0, 0, 0 },
> 		{ "port-topology",              1, 0, 0 },
> @@ -1283,6 +1285,11 @@ launch_args_parse(int argc, char** argv)
> 				rmv_interrupt = 0;
> 			if (!strcmp(lgopts[opt_idx].name, "flow-isolate-all"))
> 				flow_isolate_all = 1;
> +			if (!strcmp(lgopts[opt_idx].name,
> +					"enable-hw-drop-err-all")) {
> +				rx_err_pkt_drop_all = 1;
> +			}

{ } can be removed.

> +
> 			if (!strcmp(lgopts[opt_idx].name, "tx-offloads")) {
> 				char *end = NULL;
> 				n = strtoull(optarg, &end, 16);
> diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
> index ccba71c07..c9e7397e6 100644
> --- a/app/test-pmd/testpmd.c
> +++ b/app/test-pmd/testpmd.c
> @@ -359,6 +359,11 @@ uint8_t lsc_interrupt = 1; /* enabled by default */
>  */
> uint8_t rmv_interrupt = 1; /* enabled by default */
> 
> +/*
> + * Drop all RX error packets on HW itself.
> + */
> +uint8_t rx_err_pkt_drop_all = 0; /* disabled by default */

= 0 can be removed.

> +
> uint8_t hot_plug = 0; /**< hotplug disabled by default. */
> 
> /* After attach, port setup is called on event or by iterator */
> @@ -3359,6 +3364,9 @@ init_port_config(void)
> 		    (rte_eth_devices[pid].data->dev_flags &
> 		     RTE_ETH_DEV_INTR_RMV))
> 			port->dev_conf.intr_conf.rmv = 1;
> +
> +		if (rx_err_pkt_drop_all)
> +			port->dev_conf.err_pkt_drop_conf.all = 1;
> 	}
> }
> 
> diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
> index c7e7e41a9..eab154ed4 100644
> --- a/app/test-pmd/testpmd.h
> +++ b/app/test-pmd/testpmd.h
> @@ -314,6 +314,7 @@ extern uint8_t no_device_start; /**<set by "--disable-device-start" parameter */
> extern volatile int test_done; /* stop packet forwarding when set to 1. */
> extern uint8_t lsc_interrupt; /**< disabled by "--no-lsc-interrupt" parameter */
> extern uint8_t rmv_interrupt; /**< disabled by "--no-rmv-interrupt" parameter */
> +extern uint8_t rx_err_pkt_drop_all; /**< enabled by "--enable-hw-drop-err-all" parameter */
> extern uint32_t event_print_mask;
> /**< set by "--print-event xxxx" and "--mask-event xxxx parameters */
> extern bool setup_on_probe_event; /**< disabled by port setup-on iterator */
> diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst
> index dd8c9555b..cb7fdfd8b 100644
> --- a/doc/guides/nics/features.rst
> +++ b/doc/guides/nics/features.rst
> @@ -606,6 +606,50 @@ Supports inner packet L4 checksum.
>   ``tx_offload_capa,tx_queue_offload_capa:DEV_TX_OFFLOAD_OUTER_UDP_CKSUM``.
> 
> 
> +.. _nic_features_l1_fcs_rx_error_packet_drop:
> +
> +L1 FCS Error Packet drop on Rx
> +------------------------------
> +
> +Supports dropping of packets having L1 FCS error on Rx.
> +
> +* **[uses]     user config**: ``dev_conf.err_pkt_drop_conf.l1_fcs``.
> +* **[provides] rte_eth_dev_info**: ``rx_err_drop_offload_capa:RTE_DEV_RX_ERR_PKT_DROP_OFFLOAD_L1_FCS``.
> +
> +
> +.. _nic_features_l3_csum_rx_error_packet_drop:
> +
> +L3 checksum Error Packet drop on Rx
> +-----------------------------------
> +
> +Supports dropping of packets having L3 Checksum error on Rx.
> +
> +* **[uses]     user config**: ``dev_conf.err_pkt_drop_conf.l3_csum``.
> +* **[provides] rte_eth_dev_info**: ``rx_err_drop_offload_capa:RTE_DEV_RX_ERR_PKT_DROP_OFFLOAD_L3_CSUM``.
> +
> +
> +.. _nic_features_l4_csum_rx_error_packet_drop:
> +
> +L4 Checksum Error Packet drop on Rx
> +-----------------------------------
> +
> +Supports dropping of packets having L1 FCS error on Rx.
> +
> +* **[uses]     user config**: ``dev_conf.err_pkt_drop_conf.l4_csum``.
> +* **[provides] rte_eth_dev_info**: ``rx_err_drop_offload_capa:RTE_DEV_RX_ERR_PKT_DROP_OFFLOAD_L4_CSUM``.
> +
> +
> +.. _nic_features_all_rx_error_packet_drop:
> +
> +All/any Error Packet drop on Rx
> +-------------------------------
> +
> +Supports dropping of packets having any of the errors like L1 FSC, L3/L4 Checksum on Rx.

s/FSC/FCS

> +
> +* **[uses]     user config**: ``dev_conf.err_pkt_drop_conf.all``.
> +* **[provides] rte_eth_dev_info**: ``rx_err_drop_offload_capa:RTE_DEV_RX_ERR_PKT_DROP_OFFLOAD_ALL``.
> +
> +
> .. _nic_features_packet_type_parsing:
> 
> Packet type parsing
> diff --git a/doc/guides/testpmd_app_ug/run_app.rst b/doc/guides/testpmd_app_ug/run_app.rst
> index e2539f693..20f2f8083 100644
> --- a/doc/guides/testpmd_app_ug/run_app.rst
> +++ b/doc/guides/testpmd_app_ug/run_app.rst
> @@ -213,6 +213,10 @@ The command line options are:
> 
>     Enable hardware QINQ strip.
> 
> +*  ``--enable-hw-drop-err-all``
> +
> +    Enable hardware packet drop for any error packets
> +
> *   ``--enable-drop-en``
> 
>     Enable per-queue packet drop for packets with no descriptors.
> — 
> 2.17.1
> 

Reviewed-by: Dharmik Thakkar <dharmik.thakkar@arm.com>