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Date: Thu, 27 Oct 2022 18:00:10 -0400
From: David Thompson <davthompson@...dia.com>
To: <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
<pabeni@...hat.com>
CC: <netdev@...r.kernel.org>, <cai.huoqing@...ux.dev>, <brgl@...ev.pl>,
<limings@...dia.com>, David Thompson <davthompson@...dia.com>,
Asmaa Mnebhi <asmaa@...dia.com>
Subject: [PATCH net-next v1 1/4] mlxbf_gige: add MDIO support for BlueField-3
This patch adds initial MDIO support for the BlueField-3
SoC. Separate header files for the BlueField-2 and the
BlueField-3 SoCs have been created. These header files
hold the SoC-specific MDIO macros since the register
offsets and bit fields have changed. Also, in BlueField-3
there is a separate register for writing and reading the
MDIO data. Finally, instead of having "if" statements
everywhere to differentiate between SoC-specific logic,
a mlxbf_gige_mdio_gw_t struct was created for this purpose.
Signed-off-by: David Thompson <davthompson@...dia.com>
Signed-off-by: Asmaa Mnebhi <asmaa@...dia.com>
---
.../ethernet/mellanox/mlxbf_gige/mlxbf_gige.h | 19 ++
.../mellanox/mlxbf_gige/mlxbf_gige_main.c | 2 +
.../mellanox/mlxbf_gige/mlxbf_gige_mdio.c | 172 +++++++++++++-----
.../mellanox/mlxbf_gige/mlxbf_gige_mdio_bf2.h | 53 ++++++
.../mellanox/mlxbf_gige/mlxbf_gige_mdio_bf3.h | 54 ++++++
.../mellanox/mlxbf_gige/mlxbf_gige_regs.h | 1 +
6 files changed, 251 insertions(+), 50 deletions(-)
create mode 100644 drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio_bf2.h
create mode 100644 drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio_bf3.h
diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige.h b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige.h
index 5a1027b07215..421a0b1b766c 100644
--- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige.h
+++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige.h
@@ -67,6 +67,23 @@ struct mlxbf_gige_stats {
u64 rx_filter_discard_pkts;
};
+struct mlxbf_gige_reg_param {
+ u32 mask;
+ u32 shift;
+};
+
+struct mlxbf_gige_mdio_gw {
+ u32 gw_address;
+ u32 read_data_address;
+ struct mlxbf_gige_reg_param busy;
+ struct mlxbf_gige_reg_param write_data;
+ struct mlxbf_gige_reg_param read_data;
+ struct mlxbf_gige_reg_param devad;
+ struct mlxbf_gige_reg_param partad;
+ struct mlxbf_gige_reg_param opcode;
+ struct mlxbf_gige_reg_param st1;
+};
+
struct mlxbf_gige {
void __iomem *base;
void __iomem *llu_base;
@@ -102,6 +119,8 @@ struct mlxbf_gige {
u8 valid_polarity;
struct napi_struct napi;
struct mlxbf_gige_stats stats;
+ u8 hw_version;
+ struct mlxbf_gige_mdio_gw *mdio_gw;
};
/* Rx Work Queue Element definitions */
diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c
index 2292d63a279c..e08c07e914c1 100644
--- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c
+++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_main.c
@@ -315,6 +315,8 @@ static int mlxbf_gige_probe(struct platform_device *pdev)
spin_lock_init(&priv->lock);
+ priv->hw_version = readq(base + MLXBF_GIGE_VERSION);
+
/* Attach MDIO device */
err = mlxbf_gige_mdio_probe(pdev, priv);
if (err)
diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c
index aa780b1614a3..7ac06fd31011 100644
--- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c
+++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio.c
@@ -23,9 +23,75 @@
#include "mlxbf_gige.h"
#include "mlxbf_gige_regs.h"
+#include "mlxbf_gige_mdio_bf2.h"
+#include "mlxbf_gige_mdio_bf3.h"
-#define MLXBF_GIGE_MDIO_GW_OFFSET 0x0
-#define MLXBF_GIGE_MDIO_CFG_OFFSET 0x4
+static struct mlxbf_gige_mdio_gw mlxbf_gige_mdio_gw_t[] = {
+ [MLXBF_GIGE_VERSION_BF2] = {
+ .gw_address = MLXBF2_GIGE_MDIO_GW_OFFSET,
+ .read_data_address = MLXBF2_GIGE_MDIO_GW_OFFSET,
+ .busy = {
+ .mask = MLXBF2_GIGE_MDIO_GW_BUSY_MASK,
+ .shift = MLXBF2_GIGE_MDIO_GW_BUSY_SHIFT,
+ },
+ .read_data = {
+ .mask = MLXBF2_GIGE_MDIO_GW_AD_MASK,
+ .shift = MLXBF2_GIGE_MDIO_GW_AD_SHIFT,
+ },
+ .write_data = {
+ .mask = MLXBF2_GIGE_MDIO_GW_AD_MASK,
+ .shift = MLXBF2_GIGE_MDIO_GW_AD_SHIFT,
+ },
+ .devad = {
+ .mask = MLXBF2_GIGE_MDIO_GW_DEVAD_MASK,
+ .shift = MLXBF2_GIGE_MDIO_GW_DEVAD_SHIFT,
+ },
+ .partad = {
+ .mask = MLXBF2_GIGE_MDIO_GW_PARTAD_MASK,
+ .shift = MLXBF2_GIGE_MDIO_GW_PARTAD_SHIFT,
+ },
+ .opcode = {
+ .mask = MLXBF2_GIGE_MDIO_GW_OPCODE_MASK,
+ .shift = MLXBF2_GIGE_MDIO_GW_OPCODE_SHIFT,
+ },
+ .st1 = {
+ .mask = MLXBF2_GIGE_MDIO_GW_ST1_MASK,
+ .shift = MLXBF2_GIGE_MDIO_GW_ST1_SHIFT,
+ },
+ },
+ [MLXBF_GIGE_VERSION_BF3] = {
+ .gw_address = MLXBF3_GIGE_MDIO_GW_OFFSET,
+ .read_data_address = MLXBF3_GIGE_MDIO_DATA_READ,
+ .busy = {
+ .mask = MLXBF3_GIGE_MDIO_GW_BUSY_MASK,
+ .shift = MLXBF3_GIGE_MDIO_GW_BUSY_SHIFT,
+ },
+ .read_data = {
+ .mask = MLXBF3_GIGE_MDIO_GW_DATA_READ_MASK,
+ .shift = MLXBF3_GIGE_MDIO_GW_DATA_READ_SHIFT,
+ },
+ .write_data = {
+ .mask = MLXBF3_GIGE_MDIO_GW_DATA_MASK,
+ .shift = MLXBF3_GIGE_MDIO_GW_DATA_SHIFT,
+ },
+ .devad = {
+ .mask = MLXBF3_GIGE_MDIO_GW_DEVAD_MASK,
+ .shift = MLXBF3_GIGE_MDIO_GW_DEVAD_SHIFT,
+ },
+ .partad = {
+ .mask = MLXBF3_GIGE_MDIO_GW_PARTAD_MASK,
+ .shift = MLXBF3_GIGE_MDIO_GW_PARTAD_SHIFT,
+ },
+ .opcode = {
+ .mask = MLXBF3_GIGE_MDIO_GW_OPCODE_MASK,
+ .shift = MLXBF3_GIGE_MDIO_GW_OPCODE_SHIFT,
+ },
+ .st1 = {
+ .mask = MLXBF3_GIGE_MDIO_GW_ST1_MASK,
+ .shift = MLXBF3_GIGE_MDIO_GW_ST1_SHIFT,
+ },
+ },
+};
#define MLXBF_GIGE_MDIO_FREQ_REFERENCE 156250000ULL
#define MLXBF_GIGE_MDIO_COREPLL_CONST 16384ULL
@@ -47,30 +113,10 @@
/* Busy bit is set by software and cleared by hardware */
#define MLXBF_GIGE_MDIO_SET_BUSY 0x1
-/* MDIO GW register bits */
-#define MLXBF_GIGE_MDIO_GW_AD_MASK GENMASK(15, 0)
-#define MLXBF_GIGE_MDIO_GW_DEVAD_MASK GENMASK(20, 16)
-#define MLXBF_GIGE_MDIO_GW_PARTAD_MASK GENMASK(25, 21)
-#define MLXBF_GIGE_MDIO_GW_OPCODE_MASK GENMASK(27, 26)
-#define MLXBF_GIGE_MDIO_GW_ST1_MASK GENMASK(28, 28)
-#define MLXBF_GIGE_MDIO_GW_BUSY_MASK GENMASK(30, 30)
-
-/* MDIO config register bits */
-#define MLXBF_GIGE_MDIO_CFG_MDIO_MODE_MASK GENMASK(1, 0)
-#define MLXBF_GIGE_MDIO_CFG_MDIO3_3_MASK GENMASK(2, 2)
-#define MLXBF_GIGE_MDIO_CFG_MDIO_FULL_DRIVE_MASK GENMASK(4, 4)
-#define MLXBF_GIGE_MDIO_CFG_MDC_PERIOD_MASK GENMASK(15, 8)
-#define MLXBF_GIGE_MDIO_CFG_MDIO_IN_SAMP_MASK GENMASK(23, 16)
-#define MLXBF_GIGE_MDIO_CFG_MDIO_OUT_SAMP_MASK GENMASK(31, 24)
-
-#define MLXBF_GIGE_MDIO_CFG_VAL (FIELD_PREP(MLXBF_GIGE_MDIO_CFG_MDIO_MODE_MASK, 1) | \
- FIELD_PREP(MLXBF_GIGE_MDIO_CFG_MDIO3_3_MASK, 1) | \
- FIELD_PREP(MLXBF_GIGE_MDIO_CFG_MDIO_FULL_DRIVE_MASK, 1) | \
- FIELD_PREP(MLXBF_GIGE_MDIO_CFG_MDIO_IN_SAMP_MASK, 6) | \
- FIELD_PREP(MLXBF_GIGE_MDIO_CFG_MDIO_OUT_SAMP_MASK, 13))
-
#define MLXBF_GIGE_BF2_COREPLL_ADDR 0x02800c30
#define MLXBF_GIGE_BF2_COREPLL_SIZE 0x0000000c
+#define MLXBF_GIGE_BF3_COREPLL_ADDR 0x13409824
+#define MLXBF_GIGE_BF3_COREPLL_SIZE 0x00000010
static struct resource corepll_params[] = {
[MLXBF_GIGE_VERSION_BF2] = {
@@ -78,6 +124,11 @@ static struct resource corepll_params[] = {
.end = MLXBF_GIGE_BF2_COREPLL_ADDR + MLXBF_GIGE_BF2_COREPLL_SIZE - 1,
.name = "COREPLL_RES"
},
+ [MLXBF_GIGE_VERSION_BF3] = {
+ .start = MLXBF_GIGE_BF3_COREPLL_ADDR,
+ .end = MLXBF_GIGE_BF3_COREPLL_ADDR + MLXBF_GIGE_BF3_COREPLL_SIZE - 1,
+ .name = "COREPLL_RES"
+ }
};
/* Returns core clock i1clk in Hz */
@@ -134,19 +185,23 @@ static u8 mdio_period_map(struct mlxbf_gige *priv)
return mdio_period;
}
-static u32 mlxbf_gige_mdio_create_cmd(u16 data, int phy_add,
+static u32 mlxbf_gige_mdio_create_cmd(struct mlxbf_gige_mdio_gw *mdio_gw, u16 data, int phy_add,
int phy_reg, u32 opcode)
{
u32 gw_reg = 0;
- gw_reg |= FIELD_PREP(MLXBF_GIGE_MDIO_GW_AD_MASK, data);
- gw_reg |= FIELD_PREP(MLXBF_GIGE_MDIO_GW_DEVAD_MASK, phy_reg);
- gw_reg |= FIELD_PREP(MLXBF_GIGE_MDIO_GW_PARTAD_MASK, phy_add);
- gw_reg |= FIELD_PREP(MLXBF_GIGE_MDIO_GW_OPCODE_MASK, opcode);
- gw_reg |= FIELD_PREP(MLXBF_GIGE_MDIO_GW_ST1_MASK,
- MLXBF_GIGE_MDIO_CL22_ST1);
- gw_reg |= FIELD_PREP(MLXBF_GIGE_MDIO_GW_BUSY_MASK,
- MLXBF_GIGE_MDIO_SET_BUSY);
+ gw_reg |= ((data << mdio_gw->write_data.shift) &
+ mdio_gw->write_data.mask);
+ gw_reg |= ((phy_reg << mdio_gw->devad.shift) &
+ mdio_gw->devad.mask);
+ gw_reg |= ((phy_add << mdio_gw->partad.shift) &
+ mdio_gw->partad.mask);
+ gw_reg |= ((opcode << mdio_gw->opcode.shift) &
+ mdio_gw->opcode.mask);
+ gw_reg |= ((MLXBF_GIGE_MDIO_CL22_ST1 << mdio_gw->st1.shift) &
+ mdio_gw->st1.mask);
+ gw_reg |= ((MLXBF_GIGE_MDIO_SET_BUSY << mdio_gw->busy.shift) &
+ mdio_gw->busy.mask);
return gw_reg;
}
@@ -162,25 +217,26 @@ static int mlxbf_gige_mdio_read(struct mii_bus *bus, int phy_add, int phy_reg)
return -EOPNOTSUPP;
/* Send mdio read request */
- cmd = mlxbf_gige_mdio_create_cmd(0, phy_add, phy_reg, MLXBF_GIGE_MDIO_CL22_READ);
+ cmd = mlxbf_gige_mdio_create_cmd(priv->mdio_gw, 0, phy_add, phy_reg,
+ MLXBF_GIGE_MDIO_CL22_READ);
- writel(cmd, priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET);
+ writel(cmd, priv->mdio_io + priv->mdio_gw->gw_address);
- ret = readl_poll_timeout_atomic(priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET,
- val, !(val & MLXBF_GIGE_MDIO_GW_BUSY_MASK),
+ ret = readl_poll_timeout_atomic(priv->mdio_io + priv->mdio_gw->gw_address,
+ val, !(val & priv->mdio_gw->busy.mask),
5, 1000000);
if (ret) {
- writel(0, priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET);
+ writel(0, priv->mdio_io + priv->mdio_gw->gw_address);
return ret;
}
- ret = readl(priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET);
+ ret = readl(priv->mdio_io + priv->mdio_gw->read_data_address);
/* Only return ad bits of the gw register */
- ret &= MLXBF_GIGE_MDIO_GW_AD_MASK;
+ ret &= priv->mdio_gw->read_data.mask;
/* The MDIO lock is set on read. To release it, clear gw register */
- writel(0, priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET);
+ writel(0, priv->mdio_io + priv->mdio_gw->gw_address);
return ret;
}
@@ -197,17 +253,17 @@ static int mlxbf_gige_mdio_write(struct mii_bus *bus, int phy_add,
return -EOPNOTSUPP;
/* Send mdio write request */
- cmd = mlxbf_gige_mdio_create_cmd(val, phy_add, phy_reg,
+ cmd = mlxbf_gige_mdio_create_cmd(priv->mdio_gw, val, phy_add, phy_reg,
MLXBF_GIGE_MDIO_CL22_WRITE);
- writel(cmd, priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET);
+ writel(cmd, priv->mdio_io + priv->mdio_gw->gw_address);
/* If the poll timed out, drop the request */
- ret = readl_poll_timeout_atomic(priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET,
- temp, !(temp & MLXBF_GIGE_MDIO_GW_BUSY_MASK),
+ ret = readl_poll_timeout_atomic(priv->mdio_io + priv->mdio_gw->gw_address,
+ temp, !(temp & priv->mdio_gw->busy.mask),
5, 1000000);
/* The MDIO lock is set on read. To release it, clear gw register */
- writel(0, priv->mdio_io + MLXBF_GIGE_MDIO_GW_OFFSET);
+ writel(0, priv->mdio_io + priv->mdio_gw->gw_address);
return ret;
}
@@ -219,9 +275,20 @@ static void mlxbf_gige_mdio_cfg(struct mlxbf_gige *priv)
mdio_period = mdio_period_map(priv);
- val = MLXBF_GIGE_MDIO_CFG_VAL;
- val |= FIELD_PREP(MLXBF_GIGE_MDIO_CFG_MDC_PERIOD_MASK, mdio_period);
- writel(val, priv->mdio_io + MLXBF_GIGE_MDIO_CFG_OFFSET);
+ if (priv->hw_version == MLXBF_GIGE_VERSION_BF2) {
+ val = MLXBF2_GIGE_MDIO_CFG_VAL;
+ val |= FIELD_PREP(MLXBF2_GIGE_MDIO_CFG_MDC_PERIOD_MASK, mdio_period);
+ writel(val, priv->mdio_io + MLXBF2_GIGE_MDIO_CFG_OFFSET);
+ } else {
+ val = FIELD_PREP(MLXBF3_GIGE_MDIO_CFG_MDIO_MODE_MASK, 1) |
+ FIELD_PREP(MLXBF3_GIGE_MDIO_CFG_MDIO_FULL_DRIVE_MASK, 1);
+ writel(val, priv->mdio_io + MLXBF3_GIGE_MDIO_CFG_REG0);
+ val = FIELD_PREP(MLXBF3_GIGE_MDIO_CFG_MDC_PERIOD_MASK, mdio_period);
+ writel(val, priv->mdio_io + MLXBF3_GIGE_MDIO_CFG_REG1);
+ val = FIELD_PREP(MLXBF3_GIGE_MDIO_CFG_MDIO_IN_SAMP_MASK, 6) |
+ FIELD_PREP(MLXBF3_GIGE_MDIO_CFG_MDIO_OUT_SAMP_MASK, 13);
+ writel(val, priv->mdio_io + MLXBF3_GIGE_MDIO_CFG_REG2);
+ }
}
int mlxbf_gige_mdio_probe(struct platform_device *pdev, struct mlxbf_gige *priv)
@@ -230,6 +297,9 @@ int mlxbf_gige_mdio_probe(struct platform_device *pdev, struct mlxbf_gige *priv)
struct resource *res;
int ret;
+ if (priv->hw_version > MLXBF_GIGE_VERSION_BF3)
+ return -ENODEV;
+
priv->mdio_io = devm_platform_ioremap_resource(pdev, MLXBF_GIGE_RES_MDIO9);
if (IS_ERR(priv->mdio_io))
return PTR_ERR(priv->mdio_io);
@@ -242,13 +312,15 @@ int mlxbf_gige_mdio_probe(struct platform_device *pdev, struct mlxbf_gige *priv)
/* For backward compatibility with older ACPI tables, also keep
* CLK resource internal to the driver.
*/
- res = &corepll_params[MLXBF_GIGE_VERSION_BF2];
+ res = &corepll_params[priv->hw_version];
}
priv->clk_io = devm_ioremap(dev, res->start, resource_size(res));
if (!priv->clk_io)
return -ENOMEM;
+ priv->mdio_gw = &mlxbf_gige_mdio_gw_t[priv->hw_version];
+
mlxbf_gige_mdio_cfg(priv);
priv->mdiobus = devm_mdiobus_alloc(dev);
diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio_bf2.h b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio_bf2.h
new file mode 100644
index 000000000000..7f1ff0ac7699
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio_bf2.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR BSD-3-Clause */
+
+/* MDIO support for Mellanox Gigabit Ethernet driver
+ *
+ * Copyright (c) 2022 NVIDIA CORPORATION & AFFILIATES, ALL RIGHTS RESERVED.
+ *
+ * This software product is a proprietary product of NVIDIA CORPORATION &
+ * AFFILIATES (the "Company") and all right, title, and interest in and to the
+ * software product, including all associated intellectual property rights, are
+ * and shall remain exclusively with the Company.
+ *
+ * This software product is governed by the End User License Agreement
+ * provided with the software product.
+ */
+
+#ifndef __MLXBF_GIGE_MDIO_BF2_H__
+#define __MLXBF_GIGE_MDIO_BF2_H__
+
+#include <linux/bitfield.h>
+
+#define MLXBF2_GIGE_MDIO_GW_OFFSET 0x0
+#define MLXBF2_GIGE_MDIO_CFG_OFFSET 0x4
+
+/* MDIO GW register bits */
+#define MLXBF2_GIGE_MDIO_GW_AD_MASK GENMASK(15, 0)
+#define MLXBF2_GIGE_MDIO_GW_DEVAD_MASK GENMASK(20, 16)
+#define MLXBF2_GIGE_MDIO_GW_PARTAD_MASK GENMASK(25, 21)
+#define MLXBF2_GIGE_MDIO_GW_OPCODE_MASK GENMASK(27, 26)
+#define MLXBF2_GIGE_MDIO_GW_ST1_MASK GENMASK(28, 28)
+#define MLXBF2_GIGE_MDIO_GW_BUSY_MASK GENMASK(30, 30)
+
+#define MLXBF2_GIGE_MDIO_GW_AD_SHIFT 0
+#define MLXBF2_GIGE_MDIO_GW_DEVAD_SHIFT 16
+#define MLXBF2_GIGE_MDIO_GW_PARTAD_SHIFT 21
+#define MLXBF2_GIGE_MDIO_GW_OPCODE_SHIFT 26
+#define MLXBF2_GIGE_MDIO_GW_ST1_SHIFT 28
+#define MLXBF2_GIGE_MDIO_GW_BUSY_SHIFT 30
+
+/* MDIO config register bits */
+#define MLXBF2_GIGE_MDIO_CFG_MDIO_MODE_MASK GENMASK(1, 0)
+#define MLXBF2_GIGE_MDIO_CFG_MDIO3_3_MASK GENMASK(2, 2)
+#define MLXBF2_GIGE_MDIO_CFG_MDIO_FULL_DRIVE_MASK GENMASK(4, 4)
+#define MLXBF2_GIGE_MDIO_CFG_MDC_PERIOD_MASK GENMASK(15, 8)
+#define MLXBF2_GIGE_MDIO_CFG_MDIO_IN_SAMP_MASK GENMASK(23, 16)
+#define MLXBF2_GIGE_MDIO_CFG_MDIO_OUT_SAMP_MASK GENMASK(31, 24)
+
+#define MLXBF2_GIGE_MDIO_CFG_VAL (FIELD_PREP(MLXBF2_GIGE_MDIO_CFG_MDIO_MODE_MASK, 1) | \
+ FIELD_PREP(MLXBF2_GIGE_MDIO_CFG_MDIO3_3_MASK, 1) | \
+ FIELD_PREP(MLXBF2_GIGE_MDIO_CFG_MDIO_FULL_DRIVE_MASK, 1) | \
+ FIELD_PREP(MLXBF2_GIGE_MDIO_CFG_MDIO_IN_SAMP_MASK, 6) | \
+ FIELD_PREP(MLXBF2_GIGE_MDIO_CFG_MDIO_OUT_SAMP_MASK, 13))
+
+#endif /* __MLXBF_GIGE_MDIO_BF2_H__ */
diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio_bf3.h b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio_bf3.h
new file mode 100644
index 000000000000..9dd9144b9173
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_mdio_bf3.h
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: GPL-2.0-only OR BSD-3-Clause */
+
+/* MDIO support for Mellanox Gigabit Ethernet driver
+ *
+ * Copyright (c) 2022 NVIDIA CORPORATION & AFFILIATES, ALL RIGHTS RESERVED.
+ *
+ * This software product is a proprietary product of NVIDIA CORPORATION &
+ * AFFILIATES (the "Company") and all right, title, and interest in and to the
+ * software product, including all associated intellectual property rights, are
+ * and shall remain exclusively with the Company.
+ *
+ * This software product is governed by the End User License Agreement
+ * provided with the software product.
+ */
+
+#ifndef __MLXBF_GIGE_MDIO_BF3_H__
+#define __MLXBF_GIGE_MDIO_BF3_H__
+
+#include <linux/bitfield.h>
+
+#define MLXBF3_GIGE_MDIO_GW_OFFSET 0x80
+#define MLXBF3_GIGE_MDIO_DATA_READ 0x8c
+#define MLXBF3_GIGE_MDIO_CFG_REG0 0x100
+#define MLXBF3_GIGE_MDIO_CFG_REG1 0x104
+#define MLXBF3_GIGE_MDIO_CFG_REG2 0x108
+
+/* MDIO GW register bits */
+#define MLXBF3_GIGE_MDIO_GW_ST1_MASK GENMASK(1, 1)
+#define MLXBF3_GIGE_MDIO_GW_OPCODE_MASK GENMASK(3, 2)
+#define MLXBF3_GIGE_MDIO_GW_PARTAD_MASK GENMASK(8, 4)
+#define MLXBF3_GIGE_MDIO_GW_DEVAD_MASK GENMASK(13, 9)
+/* For BlueField-3, this field is only used for mdio write */
+#define MLXBF3_GIGE_MDIO_GW_DATA_MASK GENMASK(29, 14)
+#define MLXBF3_GIGE_MDIO_GW_BUSY_MASK GENMASK(30, 30)
+
+#define MLXBF3_GIGE_MDIO_GW_DATA_READ_MASK GENMASK(15, 0)
+
+#define MLXBF3_GIGE_MDIO_GW_ST1_SHIFT 1
+#define MLXBF3_GIGE_MDIO_GW_OPCODE_SHIFT 2
+#define MLXBF3_GIGE_MDIO_GW_PARTAD_SHIFT 4
+#define MLXBF3_GIGE_MDIO_GW_DEVAD_SHIFT 9
+#define MLXBF3_GIGE_MDIO_GW_DATA_SHIFT 14
+#define MLXBF3_GIGE_MDIO_GW_BUSY_SHIFT 30
+
+#define MLXBF3_GIGE_MDIO_GW_DATA_READ_SHIFT 0
+
+/* MDIO config register bits */
+#define MLXBF3_GIGE_MDIO_CFG_MDIO_MODE_MASK GENMASK(1, 0)
+#define MLXBF3_GIGE_MDIO_CFG_MDIO_FULL_DRIVE_MASK GENMASK(2, 2)
+#define MLXBF3_GIGE_MDIO_CFG_MDC_PERIOD_MASK GENMASK(7, 0)
+#define MLXBF3_GIGE_MDIO_CFG_MDIO_IN_SAMP_MASK GENMASK(7, 0)
+#define MLXBF3_GIGE_MDIO_CFG_MDIO_OUT_SAMP_MASK GENMASK(15, 8)
+
+#endif /* __MLXBF_GIGE_MDIO_BF3_H__ */
diff --git a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_regs.h b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_regs.h
index 7be3a793984d..8d52dbef4adf 100644
--- a/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_regs.h
+++ b/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_regs.h
@@ -10,6 +10,7 @@
#define MLXBF_GIGE_VERSION 0x0000
#define MLXBF_GIGE_VERSION_BF2 0x0
+#define MLXBF_GIGE_VERSION_BF3 0x1
#define MLXBF_GIGE_STATUS 0x0010
#define MLXBF_GIGE_STATUS_READY BIT(0)
#define MLXBF_GIGE_INT_STATUS 0x0028
--
2.30.1
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