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Miller" CC: , Subject: [PATCH net-next 2/2] net: ethernet: ti: am65-cpsw: Enable RX HW timestamp only for PTP packets Date: Thu, 15 Feb 2024 16:39:53 +0530 Message-ID: <20240215110953.3225099-2-c-vankar@ti.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240215110953.3225099-1-c-vankar@ti.com> References: <20240215110953.3225099-1-c-vankar@ti.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1790963891266593640 X-GMAIL-MSGID: 1790963891266593640 The CPSW peripherals on J7AHP, J7VCL, J7AEP, J7ES, AM64 SoCs have an errata i2401 "CPSW: Host Timestamps Cause CPSW Port to Lock up". As a workaround, Disable timestamping on all RX packets and timestamp only PTP packets. Set Time Sync Receive bits in Time Sync control register so that packets can be determined as a valid Ethernet Receive Event for time synchronization. Update the RX filter configuration to indicate Hardware Timestamping support only for PTP packets. Replace "am65_cpsw_rx_ts()" function with "am65_cpts_rx_timestamp()" function which timestamps only PTP packets. Fixes: b1f66a5bee07 ("net: ethernet: ti: am65-cpsw-nuss: enable packet timestamping support") Signed-off-by: Chintan Vankar --- drivers/net/ethernet/ti/am65-cpsw-nuss.c | 51 +++++++++++------------- 1 file changed, 24 insertions(+), 27 deletions(-) diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c index 9d2f4ac783e4..ab843fb64b93 100644 --- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c +++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c @@ -101,6 +101,12 @@ #define AM65_CPSW_PN_TS_CTL_TX_HOST_TS_EN BIT(11) #define AM65_CPSW_PN_TS_CTL_MSG_TYPE_EN_SHIFT 16 +#define AM65_CPSW_PN_TS_CTL_RX_ANX_F_EN BIT(0) +#define AM65_CPSW_PN_TS_CTL_RX_VLAN_LT1_EN BIT(1) +#define AM65_CPSW_PN_TS_CTL_RX_VLAN_LT2_EN BIT(2) +#define AM65_CPSW_PN_TS_CTL_RX_ANX_D_EN BIT(3) +#define AM65_CPSW_PN_TS_CTL_RX_ANX_E_EN BIT(9) + /* AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG register fields */ #define AM65_CPSW_PN_TS_SEQ_ID_OFFSET_SHIFT 16 @@ -124,6 +130,11 @@ AM65_CPSW_PN_TS_CTL_TX_ANX_E_EN | \ AM65_CPSW_PN_TS_CTL_TX_ANX_F_EN) +#define AM65_CPSW_TS_RX_ANX_ALL_EN \ + (AM65_CPSW_PN_TS_CTL_RX_ANX_D_EN | \ + AM65_CPSW_PN_TS_CTL_RX_ANX_E_EN | \ + AM65_CPSW_PN_TS_CTL_RX_ANX_F_EN) + #define AM65_CPSW_ALE_AGEOUT_DEFAULT 30 /* Number of TX/RX descriptors */ #define AM65_CPSW_MAX_TX_DESC 500 @@ -749,18 +760,6 @@ static int am65_cpsw_nuss_ndo_slave_open(struct net_device *ndev) return ret; } -static void am65_cpsw_nuss_rx_ts(struct sk_buff *skb, u32 *psdata) -{ - struct skb_shared_hwtstamps *ssh; - u64 ns; - - ns = ((u64)psdata[1] << 32) | psdata[0]; - - ssh = skb_hwtstamps(skb); - memset(ssh, 0, sizeof(*ssh)); - ssh->hwtstamp = ns_to_ktime(ns); -} - /* RX psdata[2] word format - checksum information */ #define AM65_CPSW_RX_PSD_CSUM_ADD GENMASK(15, 0) #define AM65_CPSW_RX_PSD_CSUM_ERR BIT(16) @@ -841,9 +840,6 @@ static int am65_cpsw_nuss_rx_packets(struct am65_cpsw_common *common, skb->dev = ndev; psdata = cppi5_hdesc_get_psdata(desc_rx); - /* add RX timestamp */ - if (port->rx_ts_enabled) - am65_cpsw_nuss_rx_ts(skb, psdata); csum_info = psdata[2]; dev_dbg(dev, "%s rx csum_info:%#x\n", __func__, csum_info); @@ -856,6 +852,9 @@ static int am65_cpsw_nuss_rx_packets(struct am65_cpsw_common *common, ndev_priv = netdev_priv(ndev); am65_cpsw_nuss_set_offload_fwd_mark(skb, ndev_priv->offload_fwd_mark); skb_put(skb, pkt_len); + skb_reset_mac_header(skb); + if (port->rx_ts_enabled) + am65_cpts_rx_timestamp(common->cpts, skb); skb->protocol = eth_type_trans(skb, ndev); am65_cpsw_nuss_rx_csum(skb, csum_info); napi_gro_receive(&common->napi_rx, skb); @@ -1334,7 +1333,6 @@ static int am65_cpsw_nuss_ndo_slave_set_mac_address(struct net_device *ndev, static int am65_cpsw_nuss_hwtstamp_set(struct net_device *ndev, struct ifreq *ifr) { - struct am65_cpsw_common *common = am65_ndev_to_common(ndev); struct am65_cpsw_port *port = am65_ndev_to_port(ndev); u32 ts_ctrl, seq_id, ts_ctrl_ltype2, ts_vlan_ltype; struct hwtstamp_config cfg; @@ -1358,11 +1356,6 @@ static int am65_cpsw_nuss_hwtstamp_set(struct net_device *ndev, case HWTSTAMP_FILTER_NONE: port->rx_ts_enabled = false; break; - case HWTSTAMP_FILTER_ALL: - case HWTSTAMP_FILTER_SOME: - case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: - case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: - case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: @@ -1372,10 +1365,13 @@ static int am65_cpsw_nuss_hwtstamp_set(struct net_device *ndev, case HWTSTAMP_FILTER_PTP_V2_EVENT: case HWTSTAMP_FILTER_PTP_V2_SYNC: case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: - case HWTSTAMP_FILTER_NTP_ALL: port->rx_ts_enabled = true; - cfg.rx_filter = HWTSTAMP_FILTER_ALL; + cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; break; + case HWTSTAMP_FILTER_ALL: + case HWTSTAMP_FILTER_SOME: + case HWTSTAMP_FILTER_NTP_ALL: + return -EOPNOTSUPP; default: return -ERANGE; } @@ -1405,6 +1401,10 @@ static int am65_cpsw_nuss_hwtstamp_set(struct net_device *ndev, ts_ctrl |= AM65_CPSW_TS_TX_ANX_ALL_EN | AM65_CPSW_PN_TS_CTL_TX_VLAN_LT1_EN; + if (port->rx_ts_enabled) + ts_ctrl |= AM65_CPSW_TS_RX_ANX_ALL_EN | + AM65_CPSW_PN_TS_CTL_RX_VLAN_LT1_EN; + writel(seq_id, port->port_base + AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG); writel(ts_vlan_ltype, port->port_base + AM65_CPSW_PORTN_REG_TS_VLAN_LTYPE_REG); @@ -1412,9 +1412,6 @@ static int am65_cpsw_nuss_hwtstamp_set(struct net_device *ndev, AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2); writel(ts_ctrl, port->port_base + AM65_CPSW_PORTN_REG_TS_CTL); - /* en/dis RX timestamp */ - am65_cpts_rx_enable(common->cpts, port->rx_ts_enabled); - return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0; } @@ -1431,7 +1428,7 @@ static int am65_cpsw_nuss_hwtstamp_get(struct net_device *ndev, cfg.tx_type = port->tx_ts_enabled ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF; cfg.rx_filter = port->rx_ts_enabled ? - HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE; + HWTSTAMP_FILTER_PTP_V2_EVENT : HWTSTAMP_FILTER_NONE; return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0; }