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Tue, 09 Feb 2021 00:45:41 -0800 Received: from SC-EXCH04.marvell.com (10.93.176.84) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 9 Feb 2021 00:45:31 -0800 Received: from DC5-EXCH01.marvell.com (10.69.176.38) by SC-EXCH04.marvell.com (10.93.176.84) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 9 Feb 2021 00:45:31 -0800 Received: from maili.marvell.com (10.69.176.80) by DC5-EXCH01.marvell.com (10.69.176.38) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 9 Feb 2021 00:45:31 -0800 Received: from stefan-pc.marvell.com (stefan-pc.marvell.com [10.5.25.21]) by maili.marvell.com (Postfix) with ESMTP id 39F373F703F; Tue, 9 Feb 2021 00:45:27 -0800 (PST) From: To: Subject: [PATCH v11 net-next 09/15] net: mvpp2: enable global flow control Date: Tue, 9 Feb 2021 10:42:25 +0200 Message-ID: <1612860151-12275-10-git-send-email-stefanc@marvell.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1612860151-12275-1-git-send-email-stefanc@marvell.com> References: <1612860151-12275-1-git-send-email-stefanc@marvell.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.737 definitions=2021-02-09_02:2021-02-09, 2021-02-09 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210209_034549_386748_991A0FE2 X-CRM114-Status: GOOD ( 18.68 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: andrew@lunn.ch, ymarkman@marvell.com, devicetree@vger.kernel.org, atenart@kernel.org, linux-kernel@vger.kernel.org, linux@armlinux.org.uk, nadavh@marvell.com, rmk+kernel@armlinux.org.uk, robh+dt@kernel.org, linux-arm-kernel@lists.infradead.org, thomas.petazzoni@bootlin.com, kuba@kernel.org, stefanc@marvell.com, mw@semihalf.com, davem@davemloft.net, gregory.clement@bootlin.com, sebastian.hesselbarth@gmail.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Stefan Chulski This patch enables global flow control in FW and in the phylink validate mask. Signed-off-by: Stefan Chulski --- drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 11 +++++-- drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 30 +++++++++++++++++++- 2 files changed, 37 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h index d2cc513c..8945fb9 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h @@ -763,9 +763,11 @@ ((kb) * 1024 - MVPP2_TX_FIFO_THRESHOLD_MIN) /* MSS Flow control */ -#define FC_QUANTA 0xFFFF -#define FC_CLK_DIVIDER 100 -#define MSS_THRESHOLD_STOP 768 +#define MSS_FC_COM_REG 0 +#define FLOW_CONTROL_ENABLE_BIT BIT(0) +#define FC_QUANTA 0xFFFF +#define FC_CLK_DIVIDER 100 +#define MSS_THRESHOLD_STOP 768 /* RX buffer constants */ #define MVPP2_SKB_SHINFO_SIZE \ @@ -1017,6 +1019,9 @@ struct mvpp2 { /* page_pool allocator */ struct page_pool *page_pool[MVPP2_PORT_MAX_RXQ]; + + /* Global TX Flow Control config */ + bool global_tx_fc; }; struct mvpp2_pcpu_stats { diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c index 8b4073c..027101b 100644 --- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c +++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c @@ -91,6 +91,16 @@ static inline u32 mvpp2_cpu_to_thread(struct mvpp2 *priv, int cpu) return cpu % priv->nthreads; } +static void mvpp2_cm3_write(struct mvpp2 *priv, u32 offset, u32 data) +{ + writel(data, priv->cm3_base + offset); +} + +static u32 mvpp2_cm3_read(struct mvpp2 *priv, u32 offset) +{ + return readl(priv->cm3_base + offset); +} + static struct page_pool * mvpp2_create_page_pool(struct device *dev, int num, int len, enum dma_data_direction dma_dir) @@ -5950,6 +5960,11 @@ static void mvpp2_phylink_validate(struct phylink_config *config, phylink_set(mask, Autoneg); phylink_set_port_modes(mask); + if (port->priv->global_tx_fc) { + phylink_set(mask, Pause); + phylink_set(mask, Asym_Pause); + } + switch (state->interface) { case PHY_INTERFACE_MODE_10GBASER: case PHY_INTERFACE_MODE_XAUI: @@ -6951,7 +6966,7 @@ static int mvpp2_probe(struct platform_device *pdev) struct resource *res; void __iomem *base; int i, shared; - int err; + int err, val; priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) @@ -7003,6 +7018,10 @@ static int mvpp2_probe(struct platform_device *pdev) err = mvpp2_get_sram(pdev, priv); if (err) dev_warn(&pdev->dev, "Fail to alloc CM3 SRAM\n"); + + /* Enable global Flow Control only if handler to SRAM not NULL */ + if (priv->cm3_base) + priv->global_tx_fc = true; } if (priv->hw_version != MVPP21 && dev_of_node(&pdev->dev)) { @@ -7168,6 +7187,15 @@ static int mvpp2_probe(struct platform_device *pdev) goto err_port_probe; } + /* Enable global flow control. In this stage global + * flow control enabled, but still disabled per port. + */ + if (priv->global_tx_fc && priv->hw_version != MVPP21) { + val = mvpp2_cm3_read(priv, MSS_FC_COM_REG); + val |= FLOW_CONTROL_ENABLE_BIT; + mvpp2_cm3_write(priv, MSS_FC_COM_REG, val); + } + mvpp2_dbgfs_init(priv, pdev->name); platform_set_drvdata(pdev, priv);