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From: Maxime Chevallier <maxime.chevallier@bootlin.com>
To: davem@davemloft.net
Cc: Maxime Chevallier <maxime.chevallier@bootlin.com>,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	Antoine Tenart <antoine.tenart@bootlin.com>,
	thomas.petazzoni@bootlin.com, gregory.clement@bootlin.com,
	miquel.raynal@bootlin.com, nadavh@marvell.com,
	stefanc@marvell.com, mw@semihalf.com,
	Russell King <linux@armlinux.org.uk>,
	linux-arm-kernel@lists.infradead.org,
	Alan Winkowski <walan@marvell.com>
Subject: [PATCH net-next 2/5] net: mvpp2: cls: Bypass C2 internals FIFOs at init
Date: Fri, 24 May 2019 12:05:51 +0200	[thread overview]
Message-ID: <20190524100554.8606-3-maxime.chevallier@bootlin.com> (raw)
In-Reply-To: <20190524100554.8606-1-maxime.chevallier@bootlin.com>

The C2 TCAM has internal FIFOs that are only useful for the built-in
self-tests. Disable these FIFOS at init, as recommended in the
functionnal specs.

Suggested-by: Alan Winkowski <walan@marvell.com>
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
---
 drivers/net/ethernet/marvell/mvpp2/mvpp2.h     | 2 ++
 drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index d5df813e08c4..bb466af9434b 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -148,6 +148,8 @@
 #define MVPP22_CLS_C2_ATTR2			0x1b6c
 #define     MVPP22_CLS_C2_ATTR2_RSS_EN		BIT(30)
 #define MVPP22_CLS_C2_ATTR3			0x1b70
+#define MVPP22_CLS_C2_TCAM_CTRL			0x1b90
+#define     MVPP22_CLS_C2_TCAM_BYPASS_FIFO	BIT(0)
 
 /* Descriptor Manager Top Registers */
 #define MVPP2_RXQ_NUM_REG			0x2040
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c
index 9ce73297276e..d549e9a29d9a 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c
@@ -923,6 +923,12 @@ void mvpp2_cls_init(struct mvpp2 *priv)
 		mvpp2_cls_c2_write(priv, &c2);
 	}
 
+	/* Disable the FIFO stages in C2 engine, which are only used in BIST
+	 * mode
+	 */
+	mvpp2_write(priv, MVPP22_CLS_C2_TCAM_CTRL,
+		    MVPP22_CLS_C2_TCAM_BYPASS_FIFO);
+
 	mvpp2_cls_port_init_flows(priv);
 }
 
-- 
2.20.1


  parent reply	other threads:[~2019-05-24 10:06 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-24 10:05 [PATCH net-next 0/5] net: mvpp2: Classifier updates, RSS Maxime Chevallier
2019-05-24 10:05 ` [PATCH net-next 1/5] net: mvpp2: cls: Use the correct number of rules in various places Maxime Chevallier
2019-05-24 10:05 ` Maxime Chevallier [this message]
2019-05-24 10:05 ` [PATCH net-next 3/5] net: mvpp2: cls: Use RSS contexts to handle RSS tables Maxime Chevallier
2020-04-13 23:43   ` Matteo Croce
2020-04-23 17:00     ` Russell King - ARM Linux admin
2020-05-09  0:12       ` Matteo Croce
2020-05-09 11:15         ` [EXT] " Stefan Chulski
2020-05-09 11:45           ` Russell King - ARM Linux admin
2020-05-09 12:16             ` Thomas Petazzoni
2020-05-09 12:48               ` Russell King - ARM Linux admin
2020-05-09 13:10                 ` Thomas Petazzoni
2020-05-09 13:14             ` Matteo Croce
2020-05-09 13:51               ` Russell King - ARM Linux admin
2020-05-09 14:48                 ` Russell King - ARM Linux admin
2020-05-09 15:31                   ` Matteo Croce
2020-05-09 19:52               ` Russell King - ARM Linux admin
2020-05-09 20:20                 ` Russell King - ARM Linux admin
2020-05-19  9:53                   ` Russell King - ARM Linux admin
2020-05-19 10:05                     ` Matteo Croce
2020-05-19 17:05                       ` Matteo Croce
2020-05-20 11:10                         ` Russell King - ARM Linux admin
2020-05-20 11:16                           ` Matteo Croce
2020-05-20 11:18                             ` Russell King - ARM Linux admin
2020-05-09 12:16           ` Matteo Croce
2020-05-09 12:31             ` Stefan Chulski
2020-05-09 13:25               ` Russell King - ARM Linux admin
2019-05-24 10:05 ` [PATCH net-next 4/5] net: mvpp2: cls: Extract the RSS context when parsing the ethtool rule Maxime Chevallier
2019-05-24 10:05 ` [PATCH net-next 5/5] net: mvpp2: cls: Support steering to RSS contexts Maxime Chevallier
2019-05-25 23:38 ` [PATCH net-next 0/5] net: mvpp2: Classifier updates, RSS David Miller

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