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 18/18] net: mvpp2: add TX FC firmware check
Date: Sun, 24 Jan 2021 13:44:07 +0200 [thread overview]
Message-ID: <1611488647-12478-19-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>
Patch check that TX FC firmware is running in CM3.
If not, global TX FC would be disabled.
Signed-off-by: Stefan Chulski <stefanc@marvell.com>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 1 +
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 41 ++++++++++++++++----
2 files changed, 35 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index 417cc43..40aad0c 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -829,6 +829,7 @@
#define MSS_THRESHOLD_STOP 768
#define MSS_THRESHOLD_START 1024
+#define MSS_FC_MAX_TIMEOUT 5000
/* 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 f8fc682..69157e8 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -934,6 +934,34 @@ static void mvpp2_bm_pool_update_fc(struct mvpp2_port *port,
spin_unlock_irqrestore(&port->priv->mss_spinlock, flags);
}
+static int mvpp2_enable_global_fc(struct mvpp2 *priv)
+{
+ int val, timeout = 0;
+
+ /* Enable global flow control. In this stage global
+ * flow control enabled, but still disabled per port.
+ */
+ val = mvpp2_cm3_read(priv, MSS_FC_COM_REG);
+ val |= FLOW_CONTROL_ENABLE_BIT;
+ mvpp2_cm3_write(priv, MSS_FC_COM_REG, val);
+
+ /* Check if Firmware running and disable FC if not*/
+ val |= FLOW_CONTROL_UPDATE_COMMAND_BIT;
+ mvpp2_cm3_write(priv, MSS_FC_COM_REG, val);
+
+ while (timeout < MSS_FC_MAX_TIMEOUT) {
+ val = mvpp2_cm3_read(priv, MSS_FC_COM_REG);
+
+ if (!(val & FLOW_CONTROL_UPDATE_COMMAND_BIT))
+ return 0;
+ usleep_range(10, 20);
+ timeout++;
+ }
+
+ priv->global_tx_fc = false;
+ return -EOPNOTSUPP;
+}
+
/* Release buffer to BM */
static inline void mvpp2_bm_pool_put(struct mvpp2_port *port, int pool,
dma_addr_t buf_dma_addr,
@@ -7289,7 +7317,7 @@ static int mvpp2_probe(struct platform_device *pdev)
struct resource *res;
void __iomem *base;
int i, shared;
- int err, val;
+ int err;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
@@ -7517,13 +7545,12 @@ 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);
+ err = mvpp2_enable_global_fc(priv);
+ if (err) {
+ dev_warn(&pdev->dev, "CM3 firmware not running, version should be higher than 18.09\n");
+ dev_warn(&pdev->dev, "Flow control not supported\n");
+ }
}
mvpp2_dbgfs_init(priv, pdev->name);
--
1.9.1
prev parent reply other threads:[~2021-01-24 11:49 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 ` [PATCH v2 RFC net-next 08/18] net: mvpp2: add FCA periodic timer configurations stefanc
2021-01-24 12:14 ` 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 ` stefanc [this message]
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