diff --git a/Documentation/userspace-api/fwctl/fwctl.rst b/Documentation/userspace-api/fwctl/fwctl.rst
index 8c586a8f677d5b..04ad78a7cd48bb 100644
--- a/Documentation/userspace-api/fwctl/fwctl.rst
+++ b/Documentation/userspace-api/fwctl/fwctl.rst
@@ -149,6 +149,7 @@ fwctl User API
 ==============
 
 .. kernel-doc:: include/uapi/fwctl/fwctl.h
+.. kernel-doc:: include/uapi/fwctl/mlx5.h
 
 sysfs Class
 -----------
diff --git a/MAINTAINERS b/MAINTAINERS
index 319169f7cb7e1c..93e64a54c56f37 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9558,14 +9558,23 @@ F:	tools/perf/bench/futex*
 F:	tools/testing/selftests/futex/
 
 FWCTL SUBSYSTEM
+M:	Dave Jiang <dave.jiang@intel.com>
 M:	Jason Gunthorpe <jgg@nvidia.com>
 M:	Saeed Mahameed <saeedm@nvidia.com>
+R:	Jonathan Cameron <Jonathan.Cameron@huawei.com>
 S:	Maintained
 F:	Documentation/userspace-api/fwctl/
 F:	drivers/fwctl/
 F:	include/linux/fwctl.h
 F:	include/uapi/fwctl/
 
+FWCTL MLX5 DRIVER
+M:	Saeed Mahameed <saeedm@nvidia.com>
+R:	Itay Avraham <itayavr@nvidia.com>
+L:	linux-kernel@vger.kernel.org
+S:	Maintained
+F:	drivers/fwctl/mlx5/
+
 GALAXYCORE GC0308 CAMERA SENSOR DRIVER
 M:	Sebastian Reichel <sre@kernel.org>
 L:	linux-media@vger.kernel.org
diff --git a/drivers/fwctl/Kconfig b/drivers/fwctl/Kconfig
index 37147a695add9a..f802cf5d4951e8 100644
--- a/drivers/fwctl/Kconfig
+++ b/drivers/fwctl/Kconfig
@@ -7,3 +7,17 @@ menuconfig FWCTL
 	  support a wide range of lockdown compatible device behaviors including
 	  manipulating device FLASH, debugging, and other activities that don't
 	  fit neatly into an existing subsystem.
+
+if FWCTL
+config FWCTL_MLX5
+	tristate "mlx5 ConnectX control fwctl driver"
+	depends on MLX5_CORE
+	help
+	  MLX5 provides interface for the user process to access the debug and
+	  configuration registers of the ConnectX hardware family
+	  (NICs, PCI switches and SmartNIC SoCs).
+	  This will allow configuration and debug tools to work out of the box on
+	  mainstream kernel.
+
+	  If you don't know what to do here, say N.
+endif
diff --git a/drivers/fwctl/Makefile b/drivers/fwctl/Makefile
index 1cad210f6ba580..1c535f694d7fe4 100644
--- a/drivers/fwctl/Makefile
+++ b/drivers/fwctl/Makefile
@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_FWCTL) += fwctl.o
+obj-$(CONFIG_FWCTL_MLX5) += mlx5/
 
 fwctl-y += main.o
diff --git a/drivers/fwctl/mlx5/Makefile b/drivers/fwctl/mlx5/Makefile
new file mode 100644
index 00000000000000..139a23e3c7c517
--- /dev/null
+++ b/drivers/fwctl/mlx5/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_FWCTL_MLX5) += mlx5_fwctl.o
+
+mlx5_fwctl-y += main.o
diff --git a/drivers/fwctl/mlx5/main.c b/drivers/fwctl/mlx5/main.c
new file mode 100644
index 00000000000000..f93aa0cecdb978
--- /dev/null
+++ b/drivers/fwctl/mlx5/main.c
@@ -0,0 +1,411 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/*
+ * Copyright (c) 2024-2025, NVIDIA CORPORATION & AFFILIATES
+ */
+#include <linux/fwctl.h>
+#include <linux/auxiliary_bus.h>
+#include <linux/mlx5/device.h>
+#include <linux/mlx5/driver.h>
+#include <uapi/fwctl/mlx5.h>
+
+#define mlx5ctl_err(mcdev, format, ...) \
+	dev_err(&mcdev->fwctl.dev, format, ##__VA_ARGS__)
+
+#define mlx5ctl_dbg(mcdev, format, ...)                             \
+	dev_dbg(&mcdev->fwctl.dev, "PID %u: " format, current->pid, \
+		##__VA_ARGS__)
+
+struct mlx5ctl_uctx {
+	struct fwctl_uctx uctx;
+	u32 uctx_caps;
+	u32 uctx_uid;
+};
+
+struct mlx5ctl_dev {
+	struct fwctl_device fwctl;
+	struct mlx5_core_dev *mdev;
+};
+DEFINE_FREE(mlx5ctl, struct mlx5ctl_dev *, if (_T) fwctl_put(&_T->fwctl));
+
+struct mlx5_ifc_mbox_in_hdr_bits {
+	u8 opcode[0x10];
+	u8 uid[0x10];
+
+	u8 reserved_at_20[0x10];
+	u8 op_mod[0x10];
+
+	u8 reserved_at_40[0x40];
+};
+
+struct mlx5_ifc_mbox_out_hdr_bits {
+	u8 status[0x8];
+	u8 reserved_at_8[0x18];
+
+	u8 syndrome[0x20];
+
+	u8 reserved_at_40[0x40];
+};
+
+enum {
+	MLX5_UCTX_OBJECT_CAP_TOOLS_RESOURCES = 0x4,
+};
+
+enum {
+	MLX5_CMD_OP_QUERY_DRIVER_VERSION = 0x10c,
+	MLX5_CMD_OP_QUERY_OTHER_HCA_CAP = 0x10e,
+	MLX5_CMD_OP_QUERY_RDB = 0x512,
+	MLX5_CMD_OP_QUERY_PSV = 0x602,
+	MLX5_CMD_OP_QUERY_DC_CNAK_TRACE = 0x716,
+	MLX5_CMD_OP_QUERY_NVMF_BACKEND_CONTROLLER = 0x722,
+	MLX5_CMD_OP_QUERY_NVMF_NAMESPACE_CONTEXT = 0x728,
+	MLX5_CMD_OP_QUERY_BURST_SIZE = 0x813,
+	MLX5_CMD_OP_QUERY_DIAGNOSTIC_PARAMS = 0x819,
+	MLX5_CMD_OP_SET_DIAGNOSTIC_PARAMS = 0x820,
+	MLX5_CMD_OP_QUERY_DIAGNOSTIC_COUNTERS = 0x821,
+	MLX5_CMD_OP_QUERY_DELAY_DROP_PARAMS = 0x911,
+	MLX5_CMD_OP_QUERY_AFU = 0x971,
+	MLX5_CMD_OP_QUERY_CAPI_PEC = 0x981,
+	MLX5_CMD_OP_QUERY_UCTX = 0xa05,
+	MLX5_CMD_OP_QUERY_UMEM = 0xa09,
+	MLX5_CMD_OP_QUERY_NVMF_CC_RESPONSE = 0xb02,
+	MLX5_CMD_OP_QUERY_EMULATED_FUNCTIONS_INFO = 0xb03,
+	MLX5_CMD_OP_QUERY_REGEXP_PARAMS = 0xb05,
+	MLX5_CMD_OP_QUERY_REGEXP_REGISTER = 0xb07,
+	MLX5_CMD_OP_USER_QUERY_XRQ_DC_PARAMS_ENTRY = 0xb08,
+	MLX5_CMD_OP_USER_QUERY_XRQ_ERROR_PARAMS = 0xb0a,
+	MLX5_CMD_OP_ACCESS_REGISTER_USER = 0xb0c,
+	MLX5_CMD_OP_QUERY_EMULATION_DEVICE_EQ_MSIX_MAPPING = 0xb0f,
+	MLX5_CMD_OP_QUERY_MATCH_SAMPLE_INFO = 0xb13,
+	MLX5_CMD_OP_QUERY_CRYPTO_STATE = 0xb14,
+	MLX5_CMD_OP_QUERY_VUID = 0xb22,
+	MLX5_CMD_OP_QUERY_DPA_PARTITION = 0xb28,
+	MLX5_CMD_OP_QUERY_DPA_PARTITIONS = 0xb2a,
+	MLX5_CMD_OP_POSTPONE_CONNECTED_QP_TIMEOUT = 0xb2e,
+	MLX5_CMD_OP_QUERY_EMULATED_RESOURCES_INFO = 0xb2f,
+	MLX5_CMD_OP_QUERY_RSV_RESOURCES = 0x8000,
+	MLX5_CMD_OP_QUERY_MTT = 0x8001,
+	MLX5_CMD_OP_QUERY_SCHED_QUEUE = 0x8006,
+};
+
+static int mlx5ctl_alloc_uid(struct mlx5ctl_dev *mcdev, u32 cap)
+{
+	u32 out[MLX5_ST_SZ_DW(create_uctx_out)] = {};
+	u32 in[MLX5_ST_SZ_DW(create_uctx_in)] = {};
+	void *uctx;
+	int ret;
+	u16 uid;
+
+	uctx = MLX5_ADDR_OF(create_uctx_in, in, uctx);
+
+	mlx5ctl_dbg(mcdev, "%s: caps 0x%x\n", __func__, cap);
+	MLX5_SET(create_uctx_in, in, opcode, MLX5_CMD_OP_CREATE_UCTX);
+	MLX5_SET(uctx, uctx, cap, cap);
+
+	ret = mlx5_cmd_exec(mcdev->mdev, in, sizeof(in), out, sizeof(out));
+	if (ret)
+		return ret;
+
+	uid = MLX5_GET(create_uctx_out, out, uid);
+	mlx5ctl_dbg(mcdev, "allocated uid %u with caps 0x%x\n", uid, cap);
+	return uid;
+}
+
+static void mlx5ctl_release_uid(struct mlx5ctl_dev *mcdev, u16 uid)
+{
+	u32 in[MLX5_ST_SZ_DW(destroy_uctx_in)] = {};
+	struct mlx5_core_dev *mdev = mcdev->mdev;
+	int ret;
+
+	MLX5_SET(destroy_uctx_in, in, opcode, MLX5_CMD_OP_DESTROY_UCTX);
+	MLX5_SET(destroy_uctx_in, in, uid, uid);
+
+	ret = mlx5_cmd_exec_in(mdev, destroy_uctx, in);
+	mlx5ctl_dbg(mcdev, "released uid %u %pe\n", uid, ERR_PTR(ret));
+}
+
+static int mlx5ctl_open_uctx(struct fwctl_uctx *uctx)
+{
+	struct mlx5ctl_uctx *mfd =
+		container_of(uctx, struct mlx5ctl_uctx, uctx);
+	struct mlx5ctl_dev *mcdev =
+		container_of(uctx->fwctl, struct mlx5ctl_dev, fwctl);
+	int uid;
+
+	/*
+	 * New FW supports the TOOLS_RESOURCES uid security label
+	 * which allows commands to manipulate the global device state.
+	 * Otherwise only basic existing RDMA devx privilege are allowed.
+	 */
+	if (MLX5_CAP_GEN(mcdev->mdev, uctx_cap) &
+	    MLX5_UCTX_OBJECT_CAP_TOOLS_RESOURCES)
+		mfd->uctx_caps |= MLX5_UCTX_OBJECT_CAP_TOOLS_RESOURCES;
+
+	uid = mlx5ctl_alloc_uid(mcdev, mfd->uctx_caps);
+	if (uid < 0)
+		return uid;
+
+	mfd->uctx_uid = uid;
+	return 0;
+}
+
+static void mlx5ctl_close_uctx(struct fwctl_uctx *uctx)
+{
+	struct mlx5ctl_dev *mcdev =
+		container_of(uctx->fwctl, struct mlx5ctl_dev, fwctl);
+	struct mlx5ctl_uctx *mfd =
+		container_of(uctx, struct mlx5ctl_uctx, uctx);
+
+	mlx5ctl_release_uid(mcdev, mfd->uctx_uid);
+}
+
+static void *mlx5ctl_info(struct fwctl_uctx *uctx, size_t *length)
+{
+	struct mlx5ctl_uctx *mfd =
+		container_of(uctx, struct mlx5ctl_uctx, uctx);
+	struct fwctl_info_mlx5 *info;
+
+	info = kzalloc(sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return ERR_PTR(-ENOMEM);
+
+	info->uid = mfd->uctx_uid;
+	info->uctx_caps = mfd->uctx_caps;
+	*length = sizeof(*info);
+	return info;
+}
+
+static bool mlx5ctl_validate_rpc(const void *in, enum fwctl_rpc_scope scope)
+{
+	u16 opcode = MLX5_GET(mbox_in_hdr, in, opcode);
+	u16 op_mod = MLX5_GET(mbox_in_hdr, in, op_mod);
+
+	/*
+	 * Currently the driver can't keep track of commands that allocate
+	 * objects in the FW, these commands are safe from a security
+	 * perspective but nothing will free the memory when the FD is closed.
+	 * For now permit only query commands and set commands that don't alter
+	 * objects. Also the caps for the scope have not been defined yet,
+	 * filter commands manually for now.
+	 */
+	switch (opcode) {
+	case MLX5_CMD_OP_POSTPONE_CONNECTED_QP_TIMEOUT:
+	case MLX5_CMD_OP_QUERY_ADAPTER:
+	case MLX5_CMD_OP_QUERY_ESW_FUNCTIONS:
+	case MLX5_CMD_OP_QUERY_HCA_CAP:
+	case MLX5_CMD_OP_QUERY_HCA_VPORT_CONTEXT:
+	case MLX5_CMD_OP_QUERY_OTHER_HCA_CAP:
+	case MLX5_CMD_OP_QUERY_ROCE_ADDRESS:
+	case MLX5_CMD_OPCODE_QUERY_VUID:
+	/*
+	 * FW limits SET_HCA_CAP on the tools UID to only the other function
+	 * mode which is used for function pre-configuration
+	 */
+	case MLX5_CMD_OP_SET_HCA_CAP:
+		return true; /* scope >= FWCTL_RPC_CONFIGURATION; */
+
+	case MLX5_CMD_OP_FPGA_QUERY_QP_COUNTERS:
+	case MLX5_CMD_OP_FPGA_QUERY_QP:
+	case MLX5_CMD_OP_NOP:
+	case MLX5_CMD_OP_QUERY_AFU:
+	case MLX5_CMD_OP_QUERY_BURST_SIZE:
+	case MLX5_CMD_OP_QUERY_CAPI_PEC:
+	case MLX5_CMD_OP_QUERY_CONG_PARAMS:
+	case MLX5_CMD_OP_QUERY_CONG_STATISTICS:
+	case MLX5_CMD_OP_QUERY_CONG_STATUS:
+	case MLX5_CMD_OP_QUERY_CQ:
+	case MLX5_CMD_OP_QUERY_CRYPTO_STATE:
+	case MLX5_CMD_OP_QUERY_DC_CNAK_TRACE:
+	case MLX5_CMD_OP_QUERY_DCT:
+	case MLX5_CMD_OP_QUERY_DELAY_DROP_PARAMS:
+	case MLX5_CMD_OP_QUERY_DIAGNOSTIC_COUNTERS:
+	case MLX5_CMD_OP_QUERY_DIAGNOSTIC_PARAMS:
+	case MLX5_CMD_OP_QUERY_DPA_PARTITION:
+	case MLX5_CMD_OP_QUERY_DPA_PARTITIONS:
+	case MLX5_CMD_OP_QUERY_DRIVER_VERSION:
+	case MLX5_CMD_OP_QUERY_EMULATED_FUNCTIONS_INFO:
+	case MLX5_CMD_OP_QUERY_EMULATED_RESOURCES_INFO:
+	case MLX5_CMD_OP_QUERY_EMULATION_DEVICE_EQ_MSIX_MAPPING:
+	case MLX5_CMD_OP_QUERY_EQ:
+	case MLX5_CMD_OP_QUERY_ESW_VPORT_CONTEXT:
+	case MLX5_CMD_OP_QUERY_FLOW_COUNTER:
+	case MLX5_CMD_OP_QUERY_FLOW_GROUP:
+	case MLX5_CMD_OP_QUERY_FLOW_TABLE_ENTRY:
+	case MLX5_CMD_OP_QUERY_FLOW_TABLE:
+	case MLX5_CMD_OP_QUERY_GENERAL_OBJECT:
+	case MLX5_CMD_OP_QUERY_HCA_VPORT_GID:
+	case MLX5_CMD_OP_QUERY_HCA_VPORT_PKEY:
+	case MLX5_CMD_OP_QUERY_ISSI:
+	case MLX5_CMD_OP_QUERY_L2_TABLE_ENTRY:
+	case MLX5_CMD_OP_QUERY_LAG:
+	case MLX5_CMD_OP_QUERY_MAD_DEMUX:
+	case MLX5_CMD_OP_QUERY_MATCH_SAMPLE_INFO:
+	case MLX5_CMD_OP_QUERY_MKEY:
+	case MLX5_CMD_OP_QUERY_MODIFY_HEADER_CONTEXT:
+	case MLX5_CMD_OP_QUERY_MTT:
+	case MLX5_CMD_OP_QUERY_NIC_VPORT_CONTEXT:
+	case MLX5_CMD_OP_QUERY_NVMF_BACKEND_CONTROLLER:
+	case MLX5_CMD_OP_QUERY_NVMF_CC_RESPONSE:
+	case MLX5_CMD_OP_QUERY_NVMF_NAMESPACE_CONTEXT:
+	case MLX5_CMD_OP_QUERY_PACKET_REFORMAT_CONTEXT:
+	case MLX5_CMD_OP_QUERY_PAGES:
+	case MLX5_CMD_OP_QUERY_PSV:
+	case MLX5_CMD_OP_QUERY_Q_COUNTER:
+	case MLX5_CMD_OP_QUERY_QP:
+	case MLX5_CMD_OP_QUERY_RATE_LIMIT:
+	case MLX5_CMD_OP_QUERY_RDB:
+	case MLX5_CMD_OP_QUERY_REGEXP_PARAMS:
+	case MLX5_CMD_OP_QUERY_REGEXP_REGISTER:
+	case MLX5_CMD_OP_QUERY_RMP:
+	case MLX5_CMD_OP_QUERY_RQ:
+	case MLX5_CMD_OP_QUERY_RQT:
+	case MLX5_CMD_OP_QUERY_RSV_RESOURCES:
+	case MLX5_CMD_OP_QUERY_SCHED_QUEUE:
+	case MLX5_CMD_OP_QUERY_SCHEDULING_ELEMENT:
+	case MLX5_CMD_OP_QUERY_SF_PARTITION:
+	case MLX5_CMD_OP_QUERY_SPECIAL_CONTEXTS:
+	case MLX5_CMD_OP_QUERY_SQ:
+	case MLX5_CMD_OP_QUERY_SRQ:
+	case MLX5_CMD_OP_QUERY_TIR:
+	case MLX5_CMD_OP_QUERY_TIS:
+	case MLX5_CMD_OP_QUERY_UCTX:
+	case MLX5_CMD_OP_QUERY_UMEM:
+	case MLX5_CMD_OP_QUERY_VHCA_MIGRATION_STATE:
+	case MLX5_CMD_OP_QUERY_VHCA_STATE:
+	case MLX5_CMD_OP_QUERY_VNIC_ENV:
+	case MLX5_CMD_OP_QUERY_VPORT_COUNTER:
+	case MLX5_CMD_OP_QUERY_VPORT_STATE:
+	case MLX5_CMD_OP_QUERY_WOL_ROL:
+	case MLX5_CMD_OP_QUERY_XRC_SRQ:
+	case MLX5_CMD_OP_QUERY_XRQ_DC_PARAMS_ENTRY:
+	case MLX5_CMD_OP_QUERY_XRQ_ERROR_PARAMS:
+	case MLX5_CMD_OP_QUERY_XRQ:
+	case MLX5_CMD_OP_USER_QUERY_XRQ_DC_PARAMS_ENTRY:
+	case MLX5_CMD_OP_USER_QUERY_XRQ_ERROR_PARAMS:
+		return scope >= FWCTL_RPC_DEBUG_READ_ONLY;
+
+	case MLX5_CMD_OP_SET_DIAGNOSTIC_PARAMS:
+		return scope >= FWCTL_RPC_DEBUG_WRITE;
+
+	case MLX5_CMD_OP_ACCESS_REG:
+	case MLX5_CMD_OP_ACCESS_REGISTER_USER:
+		if (op_mod == 0) /* write */
+			return true; /* scope >= FWCTL_RPC_CONFIGURATION; */
+		return scope >= FWCTL_RPC_DEBUG_READ_ONLY;
+	default:
+		return false;
+	}
+}
+
+static void *mlx5ctl_fw_rpc(struct fwctl_uctx *uctx, enum fwctl_rpc_scope scope,
+			    void *rpc_in, size_t in_len, size_t *out_len)
+{
+	struct mlx5ctl_dev *mcdev =
+		container_of(uctx->fwctl, struct mlx5ctl_dev, fwctl);
+	struct mlx5ctl_uctx *mfd =
+		container_of(uctx, struct mlx5ctl_uctx, uctx);
+	void *rpc_out;
+	int ret;
+
+	if (in_len < MLX5_ST_SZ_BYTES(mbox_in_hdr) ||
+	    *out_len < MLX5_ST_SZ_BYTES(mbox_out_hdr))
+		return ERR_PTR(-EMSGSIZE);
+
+	mlx5ctl_dbg(mcdev, "[UID %d] cmdif: opcode 0x%x inlen %zu outlen %zu\n",
+		    mfd->uctx_uid, MLX5_GET(mbox_in_hdr, rpc_in, opcode),
+		    in_len, *out_len);
+
+	if (!mlx5ctl_validate_rpc(rpc_in, scope))
+		return ERR_PTR(-EBADMSG);
+
+	/*
+	 * mlx5_cmd_do() copies the input message to its own buffer before
+	 * executing it, so we can reuse the allocation for the output.
+	 */
+	if (*out_len <= in_len) {
+		rpc_out = rpc_in;
+	} else {
+		rpc_out = kvzalloc(*out_len, GFP_KERNEL);
+		if (!rpc_out)
+			return ERR_PTR(-ENOMEM);
+	}
+
+	/* Enforce the user context for the command */
+	MLX5_SET(mbox_in_hdr, rpc_in, uid, mfd->uctx_uid);
+	ret = mlx5_cmd_do(mcdev->mdev, rpc_in, in_len, rpc_out, *out_len);
+
+	mlx5ctl_dbg(mcdev,
+		    "[UID %d] cmdif: opcode 0x%x status 0x%x retval %pe\n",
+		    mfd->uctx_uid, MLX5_GET(mbox_in_hdr, rpc_in, opcode),
+		    MLX5_GET(mbox_out_hdr, rpc_out, status), ERR_PTR(ret));
+
+	/*
+	 * -EREMOTEIO means execution succeeded and the out is valid,
+	 * but an error code was returned inside out. Everything else
+	 * means the RPC did not make it to the device.
+	 */
+	if (ret && ret != -EREMOTEIO) {
+		if (rpc_out != rpc_in)
+			kfree(rpc_out);
+		return ERR_PTR(ret);
+	}
+	return rpc_out;
+}
+
+static const struct fwctl_ops mlx5ctl_ops = {
+	.device_type = FWCTL_DEVICE_TYPE_MLX5,
+	.uctx_size = sizeof(struct mlx5ctl_uctx),
+	.open_uctx = mlx5ctl_open_uctx,
+	.close_uctx = mlx5ctl_close_uctx,
+	.info = mlx5ctl_info,
+	.fw_rpc = mlx5ctl_fw_rpc,
+};
+
+static int mlx5ctl_probe(struct auxiliary_device *adev,
+			 const struct auxiliary_device_id *id)
+
+{
+	struct mlx5_adev *madev = container_of(adev, struct mlx5_adev, adev);
+	struct mlx5_core_dev *mdev = madev->mdev;
+	struct mlx5ctl_dev *mcdev __free(mlx5ctl) = fwctl_alloc_device(
+		&mdev->pdev->dev, &mlx5ctl_ops, struct mlx5ctl_dev, fwctl);
+	int ret;
+
+	if (!mcdev)
+		return -ENOMEM;
+
+	mcdev->mdev = mdev;
+
+	ret = fwctl_register(&mcdev->fwctl);
+	if (ret)
+		return ret;
+	auxiliary_set_drvdata(adev, no_free_ptr(mcdev));
+	return 0;
+}
+
+static void mlx5ctl_remove(struct auxiliary_device *adev)
+{
+	struct mlx5ctl_dev *mcdev = auxiliary_get_drvdata(adev);
+
+	fwctl_unregister(&mcdev->fwctl);
+	fwctl_put(&mcdev->fwctl);
+}
+
+static const struct auxiliary_device_id mlx5ctl_id_table[] = {
+	{.name = MLX5_ADEV_NAME ".fwctl",},
+	{}
+};
+MODULE_DEVICE_TABLE(auxiliary, mlx5ctl_id_table);
+
+static struct auxiliary_driver mlx5ctl_driver = {
+	.name = "mlx5_fwctl",
+	.probe = mlx5ctl_probe,
+	.remove = mlx5ctl_remove,
+	.id_table = mlx5ctl_id_table,
+};
+
+module_auxiliary_driver(mlx5ctl_driver);
+
+MODULE_IMPORT_NS("FWCTL");
+MODULE_DESCRIPTION("mlx5 ConnectX fwctl driver");
+MODULE_AUTHOR("Saeed Mahameed <saeedm@nvidia.com>");
+MODULE_LICENSE("Dual BSD/GPL");
diff --git a/include/uapi/fwctl/fwctl.h b/include/uapi/fwctl/fwctl.h
index 0bec798790a67a..584a5ea8ecee11 100644
--- a/include/uapi/fwctl/fwctl.h
+++ b/include/uapi/fwctl/fwctl.h
@@ -42,6 +42,7 @@ enum {
 
 enum fwctl_device_type {
 	FWCTL_DEVICE_TYPE_ERROR = 0,
+	FWCTL_DEVICE_TYPE_MLX5 = 1,
 };
 
 /**
diff --git a/include/uapi/fwctl/mlx5.h b/include/uapi/fwctl/mlx5.h
new file mode 100644
index 00000000000000..625819180ac6b8
--- /dev/null
+++ b/include/uapi/fwctl/mlx5.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * Copyright (c) 2024-2025, NVIDIA CORPORATION & AFFILIATES
+ *
+ * These are definitions for the command interface for mlx5 HW. mlx5 FW has a
+ * User Context mechanism which allows the FW to understand a security scope.
+ * FWCTL binds each FD to a FW user context and then places the User Context ID
+ * (UID) in each command header. The created User Context has a capability set
+ * that is appropriate for FWCTL's security model.
+ *
+ * Command formation should use a copy of the structs in mlx5_ifc.h following
+ * the Programmers Reference Manual. A open release is available here:
+ *
+ *  https://network.nvidia.com/files/doc-2020/ethernet-adapters-programming-manual.pdf
+ *
+ * The device_type for this file is FWCTL_DEVICE_TYPE_MLX5.
+ */
+#ifndef _UAPI_FWCTL_MLX5_H
+#define _UAPI_FWCTL_MLX5_H
+
+#include <linux/types.h>
+
+/**
+ * struct fwctl_info_mlx5 - ioctl(FWCTL_INFO) out_device_data
+ * @uid: The FW UID this FD is bound to. Each command header will force
+ *	this value.
+ * @uctx_caps: The FW capabilities that are enabled for the uid.
+ *
+ * Return basic information about the FW interface available.
+ */
+struct fwctl_info_mlx5 {
+	__u32 uid;
+	__u32 uctx_caps;
+};
+
+#endif
