Thread (1 message) 1 message, 1 author, 2021-01-20

Re: [dpdk-dev] [PATCH v1] net/e1000: fix the invalid flow control mode setting

From: Guo, Jia <hidden>
Date: 2021-01-20 05:55:34

Hi, wenjun
quoted hunk
-----Original Message-----
From: Wu, Wenjun1 <redacted>
Sent: Wednesday, January 20, 2021 12:59 PM
To: dev@dpdk.org; Guo, Jia <redacted>
Cc: Wu, Wenjun1 <redacted>; stable@dpdk.org
Subject: [PATCH v1] net/e1000: fix the invalid flow control mode setting

E1000_CTRL register should be updated according to fc_conf->mode's value.

Fixes: af75078fece3 ("first public release")
Cc: stable@dpdk.org

Signed-off-by: Wenjun Wu <redacted>
---
 drivers/net/e1000/igb_ethdev.c | 32
++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
diff --git a/drivers/net/e1000/igb_ethdev.c
b/drivers/net/e1000/igb_ethdev.c index 647aa8d99..8fecd657d 100644
--- a/drivers/net/e1000/igb_ethdev.c
+++ b/drivers/net/e1000/igb_ethdev.c
@@ -3064,6 +3064,7 @@ eth_igb_flow_ctrl_set(struct rte_eth_dev *dev,
struct rte_eth_fc_conf *fc_conf)
 	uint32_t rx_buf_size;
 	uint32_t max_high_water;
 	uint32_t rctl;
+	uint32_t ctrl;

 	hw = E1000_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	if (fc_conf->autoneg != hw->mac.autoneg) @@ -3101,6 +3102,37
@@ eth_igb_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf
*fc_conf)
 			rctl &= ~E1000_RCTL_PMCF;

 		E1000_WRITE_REG(hw, E1000_RCTL, rctl);
+
+		/* check if we want to change flow control mode - driver
doesn't have native
+		 * capability to do that, so we'll write the registers ourselves
*/
No need the blank line with the code block which be explain by the doc, and please considerate the format for multiple line, like that:
		/*
		 * XXXXX
		 * XXXXX
		 */
+
+		ctrl = E1000_READ_REG(hw, E1000_CTRL);
+
+		/* set or clear E1000_CTRL_RFCE and E1000_CTRL_TFCE bits
depending
+		 * on configuration */
+
Ditto.
+		switch (fc_conf->mode) {
+		case RTE_FC_NONE:
+			ctrl &= ~E1000_CTRL_RFCE & ~E1000_CTRL_TFCE;
+			break;
+		case RTE_FC_RX_PAUSE:
+			ctrl |= E1000_CTRL_RFCE;
+			ctrl &= ~E1000_CTRL_TFCE;
+			break;
+		case RTE_FC_TX_PAUSE:
+			ctrl |= E1000_CTRL_TFCE;
+			ctrl &= ~E1000_CTRL_RFCE;
+			break;
+		case RTE_FC_FULL:
+			ctrl |= E1000_CTRL_RFCE | E1000_CTRL_TFCE;
+			break;
+		default:
+			PMD_INIT_LOG(ERR, "invalid flow control mode");
+			return -EIO;
Would be better if use "-EINVAL" for the meaning of invalid configure mode?
+		}
+
+		E1000_WRITE_REG(hw, E1000_CTRL, ctrl);
+
 		E1000_WRITE_FLUSH(hw);

 		return 0;
--
2.25.1
  
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