[dpdk-dev] [PATCH v4 5/5] raw/ifpga_rawdev/base: fix retimer link status issue

Tianfei zhang tianfei.zhang at intel.com
Fri Jun 21 10:40:17 CEST 2019


Fix the readout retimer link status incorrectly when we
remove the linux intel-fpga-driver and run the DPDK application.
The linux driver will stop the retimer when remove the kernel
modules.

Fixes: 8a256bef ("raw/ifpga/base: add eth group driver")
Cc: stable at dpdk.org

Reported-by: Sampath Amrutha <amrutha.sampath at intel.com>
Signed-off-by: Tianfei zhang <tianfei.zhang at intel.com>
---
 .../raw/ifpga_rawdev/base/opae_eth_group.c    | 172 ++++++++++++++++++
 .../raw/ifpga_rawdev/base/opae_eth_group.h    |   6 +
 .../raw/ifpga_rawdev/base/opae_intel_max10.c  |   7 -
 3 files changed, 178 insertions(+), 7 deletions(-)

diff --git a/drivers/raw/ifpga_rawdev/base/opae_eth_group.c b/drivers/raw/ifpga_rawdev/base/opae_eth_group.c
index 8db6693b1..d189dd578 100644
--- a/drivers/raw/ifpga_rawdev/base/opae_eth_group.c
+++ b/drivers/raw/ifpga_rawdev/base/opae_eth_group.c
@@ -113,6 +113,171 @@ int eth_group_read_reg(struct eth_group_device *dev,
 	return 0;
 }
 
+static int eth_group_reset_mac(struct eth_group_device *dev, u8 index,
+			       bool enable)
+{
+	u32 val;
+	int ret;
+
+	/*
+	 * only support 25G & 40G mac reset for now. It uses internal reset.
+	 * as PHY and MAC are integrated together, below action will trigger
+	 * PHY reset too.
+	 */
+	if (dev->speed != 25 && dev->speed != 40)
+		return 0;
+
+	ret = eth_group_read_reg(dev, ETH_GROUP_MAC, index, MAC_CONFIG,
+				 &val);
+	if (ret) {
+		dev_err(dev, "fail to read PHY_CONFIG: %d\n", ret);
+		return ret;
+	}
+
+	/* skip if mac is in expected state already */
+	if ((((val & MAC_RESET_MASK) == MAC_RESET_MASK) && enable) ||
+	    (((val & MAC_RESET_MASK) == 0) && !enable))
+		return 0;
+
+	if (enable)
+		val |= MAC_RESET_MASK;
+	else
+		val &= ~MAC_RESET_MASK;
+
+	ret = eth_group_write_reg(dev, ETH_GROUP_MAC, index, MAC_CONFIG,
+				  val);
+	if (ret)
+		dev_err(dev, "fail to write PHY_CONFIG: %d\n", ret);
+
+	return ret;
+}
+
+static void eth_group_mac_uinit(struct eth_group_device *dev)
+{
+	u8 i;
+
+	for (i = 0; i < dev->mac_num; i++) {
+		if (eth_group_reset_mac(dev, i, true))
+			dev_err(dev, "fail to disable mac %d\n", i);
+	}
+}
+
+static int eth_group_mac_init(struct eth_group_device *dev)
+{
+	int ret;
+	u8 i;
+
+	for (i = 0; i < dev->mac_num; i++) {
+		ret = eth_group_reset_mac(dev, i, false);
+		if (ret) {
+			dev_err(dev, "fail to enable mac %d\n", i);
+			goto exit;
+		}
+	}
+
+	return 0;
+
+exit:
+	while (i--)
+		eth_group_reset_mac(dev, i, true);
+
+	return ret;
+}
+
+static int eth_group_reset_phy(struct eth_group_device *dev, u8 index,
+		bool enable)
+{
+	u32 val;
+	int ret;
+
+	/* only support 10G PHY reset for now. It uses external reset. */
+	if (dev->speed != 10)
+		return 0;
+
+	ret = eth_group_read_reg(dev, ETH_GROUP_PHY, index,
+			ADD_PHY_CTRL, &val);
+	if (ret) {
+		dev_err(dev, "fail to read ADD_PHY_CTRL reg: %d\n", ret);
+		return ret;
+	}
+
+	/* return if PHY is already in expected state */
+	if ((val & PHY_RESET && enable) || (!(val & PHY_RESET) && !enable))
+		return 0;
+
+	if (enable)
+		val |= PHY_RESET;
+	else
+		val &= ~PHY_RESET;
+
+	ret = eth_group_write_reg(dev, ETH_GROUP_PHY, index,
+			ADD_PHY_CTRL, val);
+	if (ret)
+		dev_err(dev, "fail to write ADD_PHY_CTRL reg: %d\n", ret);
+
+	return ret;
+}
+
+static int eth_group_phy_init(struct eth_group_device *dev)
+{
+	int ret;
+	int i;
+
+	for (i = 0; i < dev->phy_num; i++) {
+		ret = eth_group_reset_phy(dev, i, false);
+		if (ret) {
+			dev_err(dev, "fail to enable phy %d\n", i);
+			goto exit;
+		}
+	}
+
+	return 0;
+exit:
+	while (i--)
+		eth_group_reset_phy(dev, i, true);
+
+	return ret;
+}
+
+static void eth_group_phy_uinit(struct eth_group_device *dev)
+{
+	int i;
+
+	for (i = 0; i < dev->phy_num; i++) {
+		if (eth_group_reset_phy(dev, i, true))
+			dev_err(dev, "fail to disable phy %d\n", i);
+	}
+}
+
+static int eth_group_hw_init(struct eth_group_device *dev)
+{
+	int ret;
+
+	ret = eth_group_phy_init(dev);
+	if (ret) {
+		dev_err(dev, "fail to init eth group phys\n");
+		return ret;
+	}
+
+	ret = eth_group_mac_init(dev);
+	if (ret) {
+		dev_err(priv->dev, "fail to init eth group macs\n");
+		goto phy_exit;
+	}
+
+	return 0;
+
+phy_exit:
+	eth_group_phy_uinit(dev);
+	return ret;
+}
+
+static void eth_group_hw_uinit(struct eth_group_device *dev)
+{
+	eth_group_mac_uinit(dev);
+	eth_group_phy_uinit(dev);
+}
+
 struct eth_group_device *eth_group_probe(void *base)
 {
 	struct eth_group_device *dev;
@@ -130,6 +295,11 @@ struct eth_group_device *eth_group_probe(void *base)
 
 	dev->status = ETH_GROUP_DEV_ATTACHED;
 
+	if (eth_group_hw_init(dev)) {
+		dev_err(dev, "eth group hw init fail\n");
+		return NULL;
+	}
+
 	dev_info(dev, "eth group device %d probe done: phy_num=mac_num:%d, speed=%d\n",
 			dev->group_id, dev->phy_num, dev->speed);
 
@@ -138,6 +308,8 @@ struct eth_group_device *eth_group_probe(void *base)
 
 void eth_group_release(struct eth_group_device *dev)
 {
+	eth_group_hw_uinit(dev);
+
 	if (dev) {
 		dev->status = ETH_GROUP_DEV_NOUSED;
 		opae_free(dev);
diff --git a/drivers/raw/ifpga_rawdev/base/opae_eth_group.h b/drivers/raw/ifpga_rawdev/base/opae_eth_group.h
index a66d77e27..4868bd0e1 100644
--- a/drivers/raw/ifpga_rawdev/base/opae_eth_group.h
+++ b/drivers/raw/ifpga_rawdev/base/opae_eth_group.h
@@ -44,6 +44,12 @@
 #define STAT_DATA_VAL		BIT_ULL(32)
 #define STAT_RD_DATA		GENMASK_ULL(31, 0)
 
+/* Additional Feature Register */
+#define ADD_PHY_CTRL            0x0
+#define PHY_RESET               BIT(0)
+#define MAC_CONFIG      0x310
+#define MAC_RESET_MASK  GENMASK(2, 0)
+
 struct opae_eth_group_info {
 	u8 group_id;
 	u8 speed;
diff --git a/drivers/raw/ifpga_rawdev/base/opae_intel_max10.c b/drivers/raw/ifpga_rawdev/base/opae_intel_max10.c
index 3ff6575d7..9ed10e282 100644
--- a/drivers/raw/ifpga_rawdev/base/opae_intel_max10.c
+++ b/drivers/raw/ifpga_rawdev/base/opae_intel_max10.c
@@ -57,13 +57,6 @@ intel_max10_device_probe(struct altera_spi_device *spi,
 	}
 	dev_info(dev, "FPGA loaded from %s Image\n", val ? "User" : "Factory");
 
-	/* set PKVL Polling manually in BBS */
-	ret = max10_reg_write(PKVL_POLLING_CTRL, 0x3);
-	if (ret != 0) {
-		dev_err(dev, "%s set PKVL polling fail\n", __func__);
-		goto spi_tran_fail;
-	}
-
 	return dev;
 
 spi_tran_fail:
-- 
2.17.1



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