From: <stefanc@marvell.com>
To: <netdev@vger.kernel.org>
Cc: <thomas.petazzoni@bootlin.com>, <davem@davemloft.net>,
<nadavh@marvell.com>, <ymarkman@marvell.com>,
<linux-kernel@vger.kernel.org>, <stefanc@marvell.com>,
<kuba@kernel.org>, <linux@armlinux.org.uk>, <mw@semihalf.com>,
<andrew@lunn.ch>, <rmk+kernel@armlinux.org.uk>,
<atenart@kernel.org>
Subject: [PATCH v2 RFC net-next 08/18] net: mvpp2: add FCA periodic timer configurations
Date: Sun, 24 Jan 2021 13:43:57 +0200 [thread overview]
Message-ID: <1611488647-12478-9-git-send-email-stefanc@marvell.com> (raw)
In-Reply-To: <1611488647-12478-1-git-send-email-stefanc@marvell.com>
From: Stefan Chulski <stefanc@marvell.com>
Flow Control periodic timer would be used if port in
XOFF to transmit periodic XOFF frames.
Signed-off-by: Stefan Chulski <stefanc@marvell.com>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 13 +++++-
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 45 ++++++++++++++++++++
2 files changed, 57 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index cac9885..0861c0b 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -596,6 +596,15 @@
#define MVPP22_MPCS_CLK_RESET_DIV_RATIO(n) ((n) << 4)
#define MVPP22_MPCS_CLK_RESET_DIV_SET BIT(11)
+/* FCA registers. PPv2.2 and PPv2.3 */
+#define MVPP22_FCA_BASE(port) (0x7600 + (port) * 0x1000)
+#define MVPP22_FCA_REG_SIZE 16
+#define MVPP22_FCA_REG_MASK 0xFFFF
+#define MVPP22_FCA_CONTROL_REG 0x0
+#define MVPP22_FCA_ENABLE_PERIODIC BIT(11)
+#define MVPP22_PERIODIC_COUNTER_LSB_REG (0x110)
+#define MVPP22_PERIODIC_COUNTER_MSB_REG (0x114)
+
/* XPCS registers. PPv2.2 and PPv2.3 */
#define MVPP22_XPCS_BASE(port) (0x7400 + (port) * 0x1000)
#define MVPP22_XPCS_CFG0 0x0
@@ -752,7 +761,9 @@
((kb) * 1024 - MVPP2_TX_FIFO_THRESHOLD_MIN)
/* MSS Flow control */
-#define MSS_SRAM_SIZE 0x800
+#define MSS_SRAM_SIZE 0x800
+#define FC_QUANTA 0xFFFF
+#define FC_CLK_DIVIDER 0x140
/* RX buffer constants */
#define MVPP2_SKB_SHINFO_SIZE \
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 7143909..9d69752 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -1293,6 +1293,49 @@ static void mvpp22_gop_init_10gkr(struct mvpp2_port *port)
writel(val, mpcs + MVPP22_MPCS_CLK_RESET);
}
+static void mvpp22_gop_fca_enable_periodic(struct mvpp2_port *port, bool en)
+{
+ struct mvpp2 *priv = port->priv;
+ void __iomem *fca = priv->iface_base + MVPP22_FCA_BASE(port->gop_id);
+ u32 val;
+
+ val = readl(fca + MVPP22_FCA_CONTROL_REG);
+ val &= ~MVPP22_FCA_ENABLE_PERIODIC;
+ if (en)
+ val |= MVPP22_FCA_ENABLE_PERIODIC;
+ writel(val, fca + MVPP22_FCA_CONTROL_REG);
+}
+
+static void mvpp22_gop_fca_set_timer(struct mvpp2_port *port, u32 timer)
+{
+ struct mvpp2 *priv = port->priv;
+ void __iomem *fca = priv->iface_base + MVPP22_FCA_BASE(port->gop_id);
+ u32 lsb, msb;
+
+ lsb = timer & MVPP22_FCA_REG_MASK;
+ msb = timer >> MVPP22_FCA_REG_SIZE;
+
+ writel(lsb, fca + MVPP22_PERIODIC_COUNTER_LSB_REG);
+ writel(msb, fca + MVPP22_PERIODIC_COUNTER_MSB_REG);
+}
+
+/* Set Flow Control timer x140 faster than pause quanta to ensure that link
+ * partner won't send taffic if port in XOFF mode.
+ */
+static void mvpp22_gop_fca_set_periodic_timer(struct mvpp2_port *port)
+{
+ u32 timer;
+
+ timer = (port->priv->tclk / (USEC_PER_SEC * FC_CLK_DIVIDER))
+ * FC_QUANTA;
+
+ mvpp22_gop_fca_enable_periodic(port, false);
+
+ mvpp22_gop_fca_set_timer(port, timer);
+
+ mvpp22_gop_fca_enable_periodic(port, true);
+}
+
static int mvpp22_gop_init(struct mvpp2_port *port)
{
struct mvpp2 *priv = port->priv;
@@ -1337,6 +1380,8 @@ static int mvpp22_gop_init(struct mvpp2_port *port)
val |= GENCONF_SOFT_RESET1_GOP;
regmap_write(priv->sysctrl_base, GENCONF_SOFT_RESET1, val);
+ mvpp22_gop_fca_set_periodic_timer(port);
+
unsupported_conf:
return 0;
--
1.9.1
next prev parent reply other threads:[~2021-01-24 12:01 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-24 11:43 [PATCH v2 RFC net-next 00/18] net: mvpp2: Add TX Flow Control support stefanc
2021-01-24 11:43 ` [PATCH v2 RFC net-next 01/18] doc: marvell: add cm3-mem device tree bindings description stefanc
2021-01-24 11:43 ` [PATCH v2 RFC net-next 02/18] dts: marvell: add CM3 SRAM memory to cp115 ethernet device tree stefanc
2021-01-24 11:43 ` [PATCH v2 RFC net-next 03/18] net: mvpp2: add CM3 SRAM memory map stefanc
2021-01-24 12:28 ` Russell King - ARM Linux admin
2021-01-24 12:44 ` Russell King - ARM Linux admin
2021-01-24 18:51 ` Andrew Lunn
2021-01-24 18:46 ` Andrew Lunn
2021-01-25 7:16 ` [EXT] " Stefan Chulski
2021-01-24 11:43 ` [PATCH v2 RFC net-next 04/18] net: mvpp2: add PPv23 version definition stefanc
2021-01-24 13:18 ` Russell King - ARM Linux admin
2021-01-24 13:55 ` [EXT] " Stefan Chulski
2021-01-24 19:03 ` Andrew Lunn
2021-01-25 7:12 ` Stefan Chulski
2021-01-24 11:43 ` [PATCH v2 RFC net-next 05/18] net: mvpp2: always compare hw-version vs MVPP21 stefanc
2021-01-24 11:43 ` [PATCH v2 RFC net-next 06/18] net: mvpp2: increase BM pool size to 2048 buffers stefanc
2021-01-24 11:43 ` [PATCH v2 RFC net-next 07/18] net: mvpp2: increase RXQ size to 1024 descriptors stefanc
2021-01-24 11:43 ` stefanc [this message]
2021-01-24 12:14 ` [PATCH v2 RFC net-next 08/18] net: mvpp2: add FCA periodic timer configurations Russell King - ARM Linux admin
2021-01-24 14:43 ` [EXT] " Stefan Chulski
2021-01-24 19:11 ` Andrew Lunn
2021-01-25 7:15 ` Stefan Chulski
2021-01-24 11:43 ` [PATCH v2 RFC net-next 09/18] net: mvpp2: add FCA RXQ non occupied descriptor threshold stefanc
2021-01-24 13:01 ` Russell King - ARM Linux admin
2021-01-24 13:24 ` [EXT] " Stefan Chulski
2021-01-24 11:43 ` [PATCH v2 RFC net-next 10/18] net: mvpp2: add spinlock for FW FCA configuration path stefanc
2021-01-24 11:44 ` [PATCH v2 RFC net-next 11/18] net: mvpp2: enable global flow control stefanc
2021-01-24 11:44 ` [PATCH v2 RFC net-next 12/18] net: mvpp2: add RXQ flow control configurations stefanc
2021-01-24 11:44 ` [PATCH v2 RFC net-next 13/18] net: mvpp2: add ethtool flow control configuration support stefanc
2021-01-24 12:35 ` Russell King - ARM Linux admin
2021-01-24 12:39 ` [EXT] " Stefan Chulski
2021-01-24 11:44 ` [PATCH v2 RFC net-next 14/18] net: mvpp2: add BM protection underrun feature support stefanc
2021-01-24 11:44 ` [PATCH v2 RFC net-next 15/18] net: mvpp2: add PPv23 RX FIFO flow control stefanc
2021-01-24 11:44 ` [PATCH v2 RFC net-next 16/18] net: mvpp2: set 802.3x GoP Flow Control mode stefanc
2021-01-24 11:44 ` [PATCH v2 RFC net-next 17/18] net: mvpp2: limit minimum ring size to 1024 descriptors stefanc
2021-01-24 11:44 ` [PATCH v2 RFC net-next 18/18] net: mvpp2: add TX FC firmware check stefanc
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