From patchwork Thu Nov 7 12:29:30 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roger Quadros X-Patchwork-Id: 841612 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EC7062101A4; Thu, 7 Nov 2024 12:29:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730982588; cv=none; b=h1pbqmr/i7mfIXX6WF8Rh9+n8gz/BgVPxUS9Xd0DrMyIGNME1QVCrOgspCblw8sC95NjC1kd4cnxlwn+Ab+eaJxrcTpH6ACuupI43wT/9nRRvYKbCDUkHX9gc+YDe8eUveOvHQ0a4mXlSuRjNsycBOgABLmjc6X3vOpIUgABVBQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730982588; c=relaxed/simple; bh=NrEV4iAZN0aliHTzyP3alx8+mfS5kV8sLdO0OPZy9zY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Mk14a8Q2gSrfUrufhkRMLzQSIXCo+MS3uVprOX7R+kwH5v+uKPBqFNcpysI9PGn8/zr5SjugSq65kbELegiJLS13vhFv8pe9rMF7Jfi/XC2EKjFZNwZp3Zc7mx/1/SMPKHLsLvXO8KOUdTdBSfxOGRjEXtVJvvKyhOINFW9nLu4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JLt1LscA; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JLt1LscA" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A5637C4CED2; Thu, 7 Nov 2024 12:29:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1730982587; bh=NrEV4iAZN0aliHTzyP3alx8+mfS5kV8sLdO0OPZy9zY=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=JLt1LscAzbLbz4jXQOAxppFBWpowV+pDW2x6NkVQeFkEuPYugn8FIiwZhzdxfxFeW HzhR1KM8iT0OsAZ8BbgwYw/ANqTnGMCQOxVpeIDk8LuiMPA0k9D3uoSK9otgCquIHS 30F90ArfTx/PdTokvY1DtOL9Du2bPgtKvpvQ/CaXJRSZQOKgBqpw7Bkd3inRLQ76tG 1VZdWxGLrLAdrDcZY0UsdG/tE/NUb6TCbWcxyatIFWpHrb9JSCAquU9U+tePbFmXaB rCi3fBbFE2xFtwRp2hrvLug7fENjgzwXSlzjS3U/xaJpUZ115nA6/AgvCacVRveMEN /isp1nQRqCm1Q== From: Roger Quadros Date: Thu, 07 Nov 2024 14:29:30 +0200 Subject: [PATCH net-next v2 2/2] net: ethernet: ti: am65-cpsw: enable DSCP to priority map for RX Precedence: bulk X-Mailing-List: linux-omap@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241107-am65-cpsw-multi-rx-dscp-v2-2-9e9cd1920035@kernel.org> References: <20241107-am65-cpsw-multi-rx-dscp-v2-0-9e9cd1920035@kernel.org> In-Reply-To: <20241107-am65-cpsw-multi-rx-dscp-v2-0-9e9cd1920035@kernel.org> To: Siddharth Vadapalli , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman Cc: linux-omap@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, srk@ti.com, Pekka Varis , Roger Quadros X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=3364; i=rogerq@kernel.org; h=from:subject:message-id; bh=NrEV4iAZN0aliHTzyP3alx8+mfS5kV8sLdO0OPZy9zY=; b=owEBbQKS/ZANAwAIAdJaa9O+djCTAcsmYgBnLLKx3sRmt/4x9giNnh1pnVhDarGvXWedi/5k8 0rxZdpLLpqJAjMEAAEIAB0WIQRBIWXUTJ9SeA+rEFjSWmvTvnYwkwUCZyyysQAKCRDSWmvTvnYw k0PbD/wJm+z+1i5O7IO8HfrlRGQ4ZkkgAXW387plEg2xN9CsLML5cFzsDJXuQSRfqm0DVmiB4B0 7fKvYwigtS6YxpK3DkhNGK6CYVXB85exGSE9ak9LT5M7dUjpkrUWxJdFFiFTnVkuA0lGd4IWM4y 2gwYCLvrj8hJSNsPjUUu3ZUGM/Bqfou3yMTH+Rhl9YnnIZaL9TEYxofsEMKWnvDcsu8DdwcmzWi XIMixFHVrGsVORaYq1l2zjXbS5fubFagQ2YPzJQWfkaZbYqdKHEpg8vlojv/tQC8HuHl8K6hpsl WhEPFL7dLpGLR1hLndYiqxjxc4mcoGzxR2t7lHskqBbFy8Sbf2J5o5d3x7ElfteBHuMl0IBh9XV v5HC4N5ThC1ctM/WSI3KNcw/Ly6z7PtwLctbJgFfqvj90kppvMStgkNrWLmy/xUhAocy4HVryiV V4IaUKrDJ4DhKuFUVMco4QwjEw+xndzEKx5wBi8ehjWXC19aZl6mz9r62uNjBMckBn9I6Q8sBy2 uhyS5euhdTopmbG9Tzy9IZ/KuvKhfIhBY0fUnBjPnLob5eouP/4TWcWvtqRLOO3gCZ42b29xaIA YF4vUPiBL/9+qBCEDHM1GEWgUeHxpDbyXCiABiArmx+tqtw5yF1UyoV7Xgje14qoyDjEMaD+TvK idX50VQETRt8DNA== X-Developer-Key: i=rogerq@kernel.org; a=openpgp; fpr=412165D44C9F52780FAB1058D25A6BD3BE763093 AM65 CPSW hardware can map the 6-bit DSCP/TOS field to appropriate priority queue via DSCP to Priority mapping registers (CPSW_PN_RX_PRI_MAP_REG). We use the upper 3 bits of the DSCP field that indicate IP Precedence to map traffic to 8 priority queues. Signed-off-by: Roger Quadros --- drivers/net/ethernet/ti/am65-cpsw-nuss.c | 50 ++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c index 0520e9f4bea7..65fbf6727e02 100644 --- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c +++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c @@ -71,6 +71,8 @@ #define AM65_CPSW_PORT_REG_RX_PRI_MAP 0x020 #define AM65_CPSW_PORT_REG_RX_MAXLEN 0x024 +#define AM65_CPSW_PORTN_REG_CTL 0x004 +#define AM65_CPSW_PORTN_REG_DSCP_MAP 0x120 #define AM65_CPSW_PORTN_REG_SA_L 0x308 #define AM65_CPSW_PORTN_REG_SA_H 0x30c #define AM65_CPSW_PORTN_REG_TS_CTL 0x310 @@ -94,6 +96,10 @@ /* AM65_CPSW_PORT_REG_PRI_CTL */ #define AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN BIT(8) +/* AM65_CPSW_PN_REG_CTL */ +#define AM65_CPSW_PN_REG_CTL_DSCP_IPV4_EN BIT(1) +#define AM65_CPSW_PN_REG_CTL_DSCP_IPV6_EN BIT(2) + /* AM65_CPSW_PN_TS_CTL register fields */ #define AM65_CPSW_PN_TS_CTL_TX_ANX_F_EN BIT(4) #define AM65_CPSW_PN_TS_CTL_TX_VLAN_LT1_EN BIT(5) @@ -176,6 +182,49 @@ static void am65_cpsw_port_set_sl_mac(struct am65_cpsw_port *slave, writel(mac_lo, slave->port_base + AM65_CPSW_PORTN_REG_SA_L); } +#define AM65_CPSW_DSCP_MAX GENMASK(5, 0) +#define AM65_CPSW_PRI_MAX GENMASK(2, 0) +static int am65_cpsw_port_set_dscp_map(struct am65_cpsw_port *slave, u8 dscp, u8 pri) +{ + int reg_ofs; + int bit_ofs; + u32 val; + + if (dscp > AM65_CPSW_DSCP_MAX) + return -EINVAL; + + if (pri > AM65_CPSW_PRI_MAX) + return -EINVAL; + + reg_ofs = (dscp / 8) * 4; /* reg offset to this dscp */ + bit_ofs = 4 * (dscp % 8); /* bit offset to this dscp */ + val = readl(slave->port_base + AM65_CPSW_PORTN_REG_DSCP_MAP + reg_ofs); + val &= ~(AM65_CPSW_PRI_MAX << bit_ofs); /* clear */ + val |= pri << bit_ofs; /* set */ + writel(val, slave->port_base + AM65_CPSW_PORTN_REG_DSCP_MAP + reg_ofs); + val = readl(slave->port_base + AM65_CPSW_PORTN_REG_DSCP_MAP + reg_ofs); + + return 0; +} + +static void am65_cpsw_port_enable_dscp_map(struct am65_cpsw_port *slave) +{ + int dscp, pri; + u32 val; + + /* Map IP Precedence field to Priority */ + for (dscp = 0; dscp <= AM65_CPSW_DSCP_MAX; dscp++) { + pri = dscp >> 3; /* Extract IP Precedence */ + am65_cpsw_port_set_dscp_map(slave, dscp, pri); + } + + /* enable port IPV4 and IPV6 DSCP for this port */ + val = readl(slave->port_base + AM65_CPSW_PORTN_REG_CTL); + val |= AM65_CPSW_PN_REG_CTL_DSCP_IPV4_EN | + AM65_CPSW_PN_REG_CTL_DSCP_IPV6_EN; + writel(val, slave->port_base + AM65_CPSW_PORTN_REG_CTL); +} + static void am65_cpsw_sl_ctl_reset(struct am65_cpsw_port *port) { cpsw_sl_reset(port->slave.mac_sl, 100); @@ -921,6 +970,7 @@ static int am65_cpsw_nuss_ndo_slave_open(struct net_device *ndev) common->usage_count++; am65_cpsw_port_set_sl_mac(port, ndev->dev_addr); + am65_cpsw_port_enable_dscp_map(port); if (common->is_emac_mode) am65_cpsw_init_port_emac_ale(port);