Re: [PATCH net-next v2 7/7] net: ti: icssg-prueth: Enable HSR Tx Tag and Rx Tag offload

[Roger Quadros <rogerq@kernel.org>]

On 13/08/2024 10:42, MD Danish Anwar wrote:
> From: Ravi Gunasekaran <r-gunasekaran@ti.com>
> 
> Add support to offload HSR Tx Tag Insertion and Rx Tag Removal
> and duplicate discard.

I can see code for Tx Tag insertion and RX tag removal.
Where are you doing duplicate discard in this patch?

> 
> Signed-off-by: Ravi Gunasekaran <r-gunasekaran@ti.com>
> ---
>  drivers/net/ethernet/ti/icssg/icssg_common.c |  3 +++
>  drivers/net/ethernet/ti/icssg/icssg_config.c |  4 +++-
>  drivers/net/ethernet/ti/icssg/icssg_config.h |  2 ++
>  drivers/net/ethernet/ti/icssg/icssg_prueth.c | 11 ++++++++++-
>  drivers/net/ethernet/ti/icssg/icssg_prueth.h |  1 +
>  5 files changed, 19 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/ti/icssg/icssg_common.c b/drivers/net/ethernet/ti/icssg/icssg_common.c
> index 2d6d8648f5a9..4eae4f9250c0 100644
> --- a/drivers/net/ethernet/ti/icssg/icssg_common.c
> +++ b/drivers/net/ethernet/ti/icssg/icssg_common.c
> @@ -721,6 +721,9 @@ enum netdev_tx icssg_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev
>  	if (prueth->is_hsr_offload_mode && (ndev->features & NETIF_F_HW_HSR_DUP))
>  		dst_tag_id = PRUETH_UNDIRECTED_PKT_DST_TAG;
>  
> +	if (prueth->is_hsr_offload_mode && (ndev->features & NETIF_F_HW_HSR_TAG_INS))
> +		epib[1] |= PRUETH_UNDIRECTED_PKT_TAG_INS;
> +
>  	cppi5_desc_set_tags_ids(&first_desc->hdr, 0, dst_tag_id);
>  	k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma);
>  	cppi5_hdesc_attach_buf(first_desc, buf_dma, pkt_len, buf_dma, pkt_len);
> diff --git a/drivers/net/ethernet/ti/icssg/icssg_config.c b/drivers/net/ethernet/ti/icssg/icssg_config.c
> index 2f485318c940..f061fa97a377 100644
> --- a/drivers/net/ethernet/ti/icssg/icssg_config.c
> +++ b/drivers/net/ethernet/ti/icssg/icssg_config.c
> @@ -531,7 +531,9 @@ static const struct icssg_r30_cmd emac_r32_bitmask[] = {
>  	{{EMAC_NONE,  0xffff4000, EMAC_NONE, EMAC_NONE}},	/* Preemption on Tx ENABLE*/
>  	{{EMAC_NONE,  0xbfff0000, EMAC_NONE, EMAC_NONE}},	/* Preemption on Tx DISABLE*/
>  	{{0xffff0010,  EMAC_NONE, 0xffff0010, EMAC_NONE}},	/* VLAN AWARE*/
> -	{{0xffef0000,  EMAC_NONE, 0xffef0000, EMAC_NONE}}	/* VLAN UNWARE*/
> +	{{0xffef0000,  EMAC_NONE, 0xffef0000, EMAC_NONE}},	/* VLAN UNWARE*/
> +	{{0xffff2000, EMAC_NONE, EMAC_NONE, EMAC_NONE}},	/* HSR_RX_OFFLOAD_ENABLE */
> +	{{0xdfff0000, EMAC_NONE, EMAC_NONE, EMAC_NONE}}		/* HSR_RX_OFFLOAD_DISABLE */
>  };
>  
>  int icssg_set_port_state(struct prueth_emac *emac,
> diff --git a/drivers/net/ethernet/ti/icssg/icssg_config.h b/drivers/net/ethernet/ti/icssg/icssg_config.h
> index 1ac60283923b..92c2deaa3068 100644
> --- a/drivers/net/ethernet/ti/icssg/icssg_config.h
> +++ b/drivers/net/ethernet/ti/icssg/icssg_config.h
> @@ -80,6 +80,8 @@ enum icssg_port_state_cmd {
>  	ICSSG_EMAC_PORT_PREMPT_TX_DISABLE,
>  	ICSSG_EMAC_PORT_VLAN_AWARE_ENABLE,
>  	ICSSG_EMAC_PORT_VLAN_AWARE_DISABLE,
> +	ICSSG_EMAC_HSR_RX_OFFLOAD_ENABLE,
> +	ICSSG_EMAC_HSR_RX_OFFLOAD_DISABLE,
>  	ICSSG_EMAC_PORT_MAX_COMMANDS
>  };
>  
> diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
> index 521e9f914459..582e72dd8f3f 100644
> --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c
> +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c
> @@ -42,7 +42,9 @@
>  #define DEFAULT_UNTAG_MASK	1
>  
>  #define NETIF_PRUETH_HSR_OFFLOAD	(NETIF_F_HW_HSR_FWD | \
> -					 NETIF_F_HW_HSR_DUP)
> +					 NETIF_F_HW_HSR_DUP | \
> +					 NETIF_F_HW_HSR_TAG_INS | \
> +					 NETIF_F_HW_HSR_TAG_RM)
>  
>  /* CTRLMMR_ICSSG_RGMII_CTRL register bits */
>  #define ICSSG_CTRL_RGMII_ID_MODE                BIT(24)
> @@ -1032,6 +1034,13 @@ static void icssg_change_mode(struct prueth *prueth)
>  
>  	for (mac = PRUETH_MAC0; mac < PRUETH_NUM_MACS; mac++) {
>  		emac = prueth->emac[mac];
> +		if (prueth->is_hsr_offload_mode) {
> +			if (emac->ndev->features & NETIF_F_HW_HSR_TAG_RM)
> +				icssg_set_port_state(emac, ICSSG_EMAC_HSR_RX_OFFLOAD_ENABLE);
> +			else
> +				icssg_set_port_state(emac, ICSSG_EMAC_HSR_RX_OFFLOAD_DISABLE);
> +		}
> +
>  		if (netif_running(emac->ndev)) {
>  			icssg_fdb_add_del(emac, eth_stp_addr, prueth->default_vlan,
>  					  ICSSG_FDB_ENTRY_P0_MEMBERSHIP |
> diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.h b/drivers/net/ethernet/ti/icssg/icssg_prueth.h
> index 6cb1dce8b309..246f1e41c13a 100644
> --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.h
> +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.h
> @@ -58,6 +58,7 @@
>  #define IEP_DEFAULT_CYCLE_TIME_NS	1000000	/* 1 ms */
>  
>  #define PRUETH_UNDIRECTED_PKT_DST_TAG	0
> +#define PRUETH_UNDIRECTED_PKT_TAG_INS	BIT(30)
>  
>  /* Firmware status codes */
>  #define ICSS_HS_FW_READY 0x55555555

-- 
cheers,
-roger