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b=JAqvauOYWsj2m2H+bc0DLStO5+/enypN4ofYsLVVz6Lq+oDoBIWSgBXqghMu6qXQGZ4MlEXU+FasEYcx98dz+e9D34d75i9ccEQlvSmWITGpBslQKnkekhPErjmFdkTPL9GkAicHUrx3QqqqQoQUXen7XCmOyKcEsaYcQ0alUtdu5FWDcDj+80kgS0+xNRuC/OqFi9gh7jPV5zzSR9r+jTkwE8kPSpF9VBdFMaeSvN15yv1cNgHBnNQWgRwNtW/NenFlh7vUfLb5scnAkncw6va0ERD+tBXjeph+J0U44kiAnmLP3YQf3Kcncyl2CDsBD/GL6/3pIVAku4QuTVSKTw== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from PAXPR04MB8510.eurprd04.prod.outlook.com (2603:10a6:102:211::7) by AM7PR04MB7032.eurprd04.prod.outlook.com (2603:10a6:20b:112::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8272.13; Thu, 19 Dec 2024 06:04:29 +0000 Received: from PAXPR04MB8510.eurprd04.prod.outlook.com ([fe80::a7c2:e2fa:8e04:40db]) by PAXPR04MB8510.eurprd04.prod.outlook.com ([fe80::a7c2:e2fa:8e04:40db%6]) with mapi id 15.20.8272.005; Thu, 19 Dec 2024 06:04:29 +0000 From: Wei Fang To: claudiu.manoil@nxp.com, vladimir.oltean@nxp.com, xiaoning.wang@nxp.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, frank.li@nxp.com, horms@kernel.org, idosch@idosch.org, aleksander.lobakin@intel.com Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev Subject: [PATCH v9 net-next 2/4] net: enetc: update max chained Tx BD number for i.MX95 ENETC Date: Thu, 19 Dec 2024 13:47:53 +0800 Message-Id: <20241219054755.1615626-3-wei.fang@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241219054755.1615626-1-wei.fang@nxp.com> References: <20241219054755.1615626-1-wei.fang@nxp.com> X-ClientProxiedBy: JH0PR01CA0107.apcprd01.prod.exchangelabs.com (2603:1096:990:59::7) To PAXPR04MB8510.eurprd04.prod.outlook.com (2603:10a6:102:211::7) Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PAXPR04MB8510:EE_|AM7PR04MB7032:EE_ X-MS-Office365-Filtering-Correlation-Id: 1226a3a3-f73f-45d8-b2ed-08dd1ff2ffcf X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|52116014|7416014|376014|1800799024|366016|921020|38350700014; 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In addition, add max_frags in struct enetc_drvdata to indicate the max chained BDs supported by device. Because the max number of chained BDs supported by LS1028A and i.MX95 ENETC is different. Signed-off-by: Wei Fang Reviewed-by: Frank Li Reviewed-by: Claudiu Manoil Reviewed-by: Simon Horman --- v2: 1. Refine the commit message 2. Add Reviewed-by tag v3 ~ v9: no changes --- drivers/net/ethernet/freescale/enetc/enetc.c | 13 +++++++++---- drivers/net/ethernet/freescale/enetc/enetc.h | 13 +++++++++++-- .../net/ethernet/freescale/enetc/enetc_pf_common.c | 1 + drivers/net/ethernet/freescale/enetc/enetc_vf.c | 1 + 4 files changed, 22 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/ethernet/freescale/enetc/enetc.c index 88f12c88110f..76c33506991b 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc.c +++ b/drivers/net/ethernet/freescale/enetc/enetc.c @@ -534,6 +534,7 @@ static void enetc_tso_complete_csum(struct enetc_bdr *tx_ring, struct tso_t *tso static int enetc_map_tx_tso_buffs(struct enetc_bdr *tx_ring, struct sk_buff *skb) { + struct enetc_ndev_priv *priv = netdev_priv(tx_ring->ndev); int hdr_len, total_len, data_len; struct enetc_tx_swbd *tx_swbd; union enetc_tx_bd *txbd; @@ -599,7 +600,7 @@ static int enetc_map_tx_tso_buffs(struct enetc_bdr *tx_ring, struct sk_buff *skb bd_data_num++; tso_build_data(skb, &tso, size); - if (unlikely(bd_data_num >= ENETC_MAX_SKB_FRAGS && data_len)) + if (unlikely(bd_data_num >= priv->max_frags && data_len)) goto err_chained_bd; } @@ -660,7 +661,7 @@ static netdev_tx_t enetc_start_xmit(struct sk_buff *skb, count = enetc_map_tx_tso_buffs(tx_ring, skb); enetc_unlock_mdio(); } else { - if (unlikely(skb_shinfo(skb)->nr_frags > ENETC_MAX_SKB_FRAGS)) + if (unlikely(skb_shinfo(skb)->nr_frags > priv->max_frags)) if (unlikely(skb_linearize(skb))) goto drop_packet_err; @@ -678,7 +679,7 @@ static netdev_tx_t enetc_start_xmit(struct sk_buff *skb, if (unlikely(!count)) goto drop_packet_err; - if (enetc_bd_unused(tx_ring) < ENETC_TXBDS_MAX_NEEDED) + if (enetc_bd_unused(tx_ring) < ENETC_TXBDS_MAX_NEEDED(priv->max_frags)) netif_stop_subqueue(ndev, tx_ring->index); return NETDEV_TX_OK; @@ -946,7 +947,8 @@ static bool enetc_clean_tx_ring(struct enetc_bdr *tx_ring, int napi_budget) if (unlikely(tx_frm_cnt && netif_carrier_ok(ndev) && __netif_subqueue_stopped(ndev, tx_ring->index) && !test_bit(ENETC_TX_DOWN, &priv->flags) && - (enetc_bd_unused(tx_ring) >= ENETC_TXBDS_MAX_NEEDED))) { + (enetc_bd_unused(tx_ring) >= + ENETC_TXBDS_MAX_NEEDED(priv->max_frags)))) { netif_wake_subqueue(ndev, tx_ring->index); } @@ -3307,18 +3309,21 @@ EXPORT_SYMBOL_GPL(enetc_pci_remove); static const struct enetc_drvdata enetc_pf_data = { .sysclk_freq = ENETC_CLK_400M, .pmac_offset = ENETC_PMAC_OFFSET, + .max_frags = ENETC_MAX_SKB_FRAGS, .eth_ops = &enetc_pf_ethtool_ops, }; static const struct enetc_drvdata enetc4_pf_data = { .sysclk_freq = ENETC_CLK_333M, .tx_csum = true, + .max_frags = ENETC4_MAX_SKB_FRAGS, .pmac_offset = ENETC4_PMAC_OFFSET, .eth_ops = &enetc4_pf_ethtool_ops, }; static const struct enetc_drvdata enetc_vf_data = { .sysclk_freq = ENETC_CLK_400M, + .max_frags = ENETC_MAX_SKB_FRAGS, .eth_ops = &enetc_vf_ethtool_ops, }; diff --git a/drivers/net/ethernet/freescale/enetc/enetc.h b/drivers/net/ethernet/freescale/enetc/enetc.h index e82eb9a9137c..1e680f0f5123 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc.h +++ b/drivers/net/ethernet/freescale/enetc/enetc.h @@ -59,9 +59,16 @@ struct enetc_rx_swbd { /* ENETC overhead: optional extension BD + 1 BD gap */ #define ENETC_TXBDS_NEEDED(val) ((val) + 2) -/* max # of chained Tx BDs is 15, including head and extension BD */ +/* For LS1028A, max # of chained Tx BDs is 15, including head and + * extension BD. + */ #define ENETC_MAX_SKB_FRAGS 13 -#define ENETC_TXBDS_MAX_NEEDED ENETC_TXBDS_NEEDED(ENETC_MAX_SKB_FRAGS + 1) +/* For ENETC v4 and later versions, max # of chained Tx BDs is 63, + * including head and extension BD, but the range of MAX_SKB_FRAGS + * is 17 ~ 45, so set ENETC4_MAX_SKB_FRAGS to MAX_SKB_FRAGS. + */ +#define ENETC4_MAX_SKB_FRAGS MAX_SKB_FRAGS +#define ENETC_TXBDS_MAX_NEEDED(x) ENETC_TXBDS_NEEDED((x) + 1) struct enetc_ring_stats { unsigned int packets; @@ -235,6 +242,7 @@ enum enetc_errata { struct enetc_drvdata { u32 pmac_offset; /* Only valid for PSI which supports 802.1Qbu */ u8 tx_csum:1; + u8 max_frags; u64 sysclk_freq; const struct ethtool_ops *eth_ops; }; @@ -377,6 +385,7 @@ struct enetc_ndev_priv { u16 msg_enable; u8 preemptible_tcs; + u8 max_frags; /* The maximum number of BDs for fragments */ enum enetc_active_offloads active_offloads; diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c b/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c index 09f2d7ec44eb..00b73a948746 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c +++ b/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c @@ -101,6 +101,7 @@ void enetc_pf_netdev_setup(struct enetc_si *si, struct net_device *ndev, priv->msg_enable = (NETIF_MSG_WOL << 1) - 1; priv->sysclk_freq = si->drvdata->sysclk_freq; + priv->max_frags = si->drvdata->max_frags; ndev->netdev_ops = ndev_ops; enetc_set_ethtool_ops(ndev); ndev->watchdog_timeo = 5 * HZ; diff --git a/drivers/net/ethernet/freescale/enetc/enetc_vf.c b/drivers/net/ethernet/freescale/enetc/enetc_vf.c index a5f8ce576b6e..63d78b2b8670 100644 --- a/drivers/net/ethernet/freescale/enetc/enetc_vf.c +++ b/drivers/net/ethernet/freescale/enetc/enetc_vf.c @@ -136,6 +136,7 @@ static void enetc_vf_netdev_setup(struct enetc_si *si, struct net_device *ndev, priv->msg_enable = (NETIF_MSG_IFUP << 1) - 1; priv->sysclk_freq = si->drvdata->sysclk_freq; + priv->max_frags = si->drvdata->max_frags; ndev->netdev_ops = ndev_ops; enetc_set_ethtool_ops(ndev); ndev->watchdog_timeo = 5 * HZ;