Re: [PATCH net-next v3 4/6] net: ti: icssg-prueth: Enable HSR Tx Packet duplication offload
From: Roger Quadros <rogerq@kernel.org>
Date: 2024-08-30 13:30:16
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linux-arm-kernel, lkml
On 28/08/2024 12:18, MD Danish Anwar wrote:
quoted hunk ↗ jump to hunk
From: Ravi Gunasekaran <redacted> The HSR stack allows to offload its Tx packet duplication functionality to the hardware. Enable this offloading feature for ICSSG driver Signed-off-by: Ravi Gunasekaran <redacted> Signed-off-by: MD Danish Anwar <danishanwar@ti.com> --- drivers/net/ethernet/ti/icssg/icssg_common.c | 13 ++++++++++--- drivers/net/ethernet/ti/icssg/icssg_prueth.c | 5 +++-- drivers/net/ethernet/ti/icssg/icssg_prueth.h | 2 ++ 3 files changed, 15 insertions(+), 5 deletions(-)diff --git a/drivers/net/ethernet/ti/icssg/icssg_common.c b/drivers/net/ethernet/ti/icssg/icssg_common.c index b9d8a93d1680..2d6d8648f5a9 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_common.c +++ b/drivers/net/ethernet/ti/icssg/icssg_common.c@@ -660,14 +660,15 @@ enum netdev_tx icssg_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev { struct cppi5_host_desc_t *first_desc, *next_desc, *cur_desc; struct prueth_emac *emac = netdev_priv(ndev); + struct prueth *prueth = emac->prueth; struct netdev_queue *netif_txq; struct prueth_tx_chn *tx_chn; dma_addr_t desc_dma, buf_dma; + u32 pkt_len, dst_tag_id; int i, ret = 0, q_idx; bool in_tx_ts = 0; int tx_ts_cookie; void **swdata; - u32 pkt_len; u32 *epib; pkt_len = skb_headlen(skb);@@ -712,9 +713,15 @@ enum netdev_tx icssg_ndo_start_xmit(struct sk_buff *skb, struct net_device *ndev /* set dst tag to indicate internal qid at the firmware which is at * bit8..bit15. bit0..bit7 indicates port num for directed - * packets in case of switch mode operation + * packets in case of switch mode operation and port num 0 + * for undirected packets in case of HSR offload mode */ - cppi5_desc_set_tags_ids(&first_desc->hdr, 0, (emac->port_id | (q_idx << 8))); + dst_tag_id = emac->port_id | (q_idx << 8); + + if (prueth->is_hsr_offload_mode && (ndev->features & NETIF_F_HW_HSR_DUP)) + dst_tag_id = PRUETH_UNDIRECTED_PKT_DST_TAG; + + 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); swdata = cppi5_hdesc_get_swdata(first_desc);diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.c b/drivers/net/ethernet/ti/icssg/icssg_prueth.c index f4fd346fe6f5..b60efe7bd7a7 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.c +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.c@@ -41,7 +41,8 @@ #define DEFAULT_PORT_MASK 1 #define DEFAULT_UNTAG_MASK 1 -#define NETIF_PRUETH_HSR_OFFLOAD_FEATURES NETIF_F_HW_HSR_FWD +#define NETIF_PRUETH_HSR_OFFLOAD_FEATURES (NETIF_F_HW_HSR_FWD | \ + NETIF_F_HW_HSR_DUP)
You mentioned that these 2 features can't be enabled individually. So better to squash this with previous patch and use ndo_fix_features() to make sure both are set or cleared together.
quoted hunk ↗ jump to hunk
/* CTRLMMR_ICSSG_RGMII_CTRL register bits */ #define ICSSG_CTRL_RGMII_ID_MODE BIT(24)@@ -897,7 +898,7 @@ static int prueth_netdev_init(struct prueth *prueth, ndev->ethtool_ops = &icssg_ethtool_ops; ndev->hw_features = NETIF_F_SG; ndev->features = ndev->hw_features; - ndev->hw_features |= NETIF_F_HW_HSR_FWD; + ndev->hw_features |= NETIF_PRUETH_HSR_OFFLOAD_FEATURES; netif_napi_add(ndev, &emac->napi_rx, icssg_napi_rx_poll); hrtimer_init(&emac->rx_hrtimer, CLOCK_MONOTONIC,diff --git a/drivers/net/ethernet/ti/icssg/icssg_prueth.h b/drivers/net/ethernet/ti/icssg/icssg_prueth.h index a4b025fae797..e110a5f92684 100644 --- a/drivers/net/ethernet/ti/icssg/icssg_prueth.h +++ b/drivers/net/ethernet/ti/icssg/icssg_prueth.h@@ -59,6 +59,8 @@ #define IEP_DEFAULT_CYCLE_TIME_NS 1000000 /* 1 ms */ +#define PRUETH_UNDIRECTED_PKT_DST_TAG 0 + /* Firmware status codes */ #define ICSS_HS_FW_READY 0x55555555 #define ICSS_HS_FW_DEAD 0xDEAD0000 /* lower 16 bits contain error code */
-- cheers, -roger