Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/linux

Tony Nguyen says:

====================
Add RDMA support for Intel IPU E2000 in idpf

Tatyana Nikolova says:

This idpf patch series is the second part of the staged submission for
introducing RDMA RoCEv2 support for the IPU E2000 line of products,
referred to as GEN3.

To support RDMA GEN3 devices, the idpf driver uses common definitions
of the IIDC interface and implements specific device functionality in
iidc_rdma_idpf.h.

The IPU model can host one or more logical network endpoints called
vPorts per PCI function that are flexibly associated with a physical
port or an internal communication port.

Other features as it pertains to GEN3 devices include:
* MMIO learning
* RDMA capability negotiation
* RDMA vectors discovery between idpf and control plane

These patches are split from the submission "Add RDMA support for Intel
IPU E2000 (GEN3)" [1]. The patches have been tested on a range of hosts
and platforms with a variety of general RDMA applications which include
standalone verbs (rping, perftest, etc.), storage and HPC applications.

Signed-off-by: Tony Nguyen <[e-mail]>

[1] https://lore.kernel.org/all/[e-mail]/
This idpf patch series is the second part of the staged submission for
introducing RDMA RoCEv2 support for the IPU E2000 line of products,
referred to as GEN3.

To support RDMA GEN3 devices, the idpf driver uses common definitions
of the IIDC interface and implements specific device functionality in
iidc_rdma_idpf.h.

The IPU model can host one or more logical network endpoints called
vPorts per PCI function that are flexibly associated with a physical
port or an internal communication port.

Other features as it pertains to GEN3 devices include:
* MMIO learning
* RDMA capability negotiation
* RDMA vectors discovery between idpf and control plane

These patches are split from the submission "Add RDMA support for Intel
IPU E2000 (GEN3)" [1]. The patches have been tested on a range of hosts
and platforms with a variety of general RDMA applications which include
standalone verbs (rping, perftest, etc.), storage and HPC applications.

Signed-off-by: Tony Nguyen <[e-mail]>

[1] https://lore.kernel.org/all/[e-mail]/

IWL reviews:
v3: https://lore.kernel.org/all/[e-mail]/
v2: https://lore.kernel.org/all/[e-mail]/
v1 (split from previous series):
https://lore.kernel.org/all/[e-mail]/

v3: https://lore.kernel.org/all/[e-mail]/
RFC v2: https://lore.kernel.org/all/[e-mail]/
RFC: https://lore.kernel.org/all/[e-mail]/

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/linux:
idpf: implement get LAN MMIO memory regions
idpf: implement IDC vport aux driver MTU change handler
idpf: implement remaining IDC RDMA core callbacks and handlers
idpf: implement RDMA vport auxiliary dev create, init, and destroy
idpf: implement core RDMA auxiliary dev create, init, and destroy
idpf: use reserved RDMA vectors from control plane
====================

Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Paolo Abeni <[e-mail]>

drivers/net/ethernet/intel/idpf/Makefile

···
 	idpf_controlq_setup.o	\
 	idpf_dev.o		\
 	idpf_ethtool.o		\
+	idpf_idc.o		\
 	idpf_lib.o		\
 	idpf_main.o		\
 	idpf_txrx.o		\

drivers/net/ethernet/intel/idpf/idpf.h

···
 #include <net/pkt_sched.h>
 #include <linux/aer.h>
 #include <linux/etherdevice.h>
+#include <linux/ioport.h>
 #include <linux/pci.h>
 #include <linux/bitfield.h>
 #include <linux/sctp.h>
 #include <linux/ethtool_netlink.h>
 #include <net/gro.h>
+
+#include <linux/net/intel/iidc_rdma.h>
+#include <linux/net/intel/iidc_rdma_idpf.h>
 
 #include "virtchnl2.h"
 #include "idpf_txrx.h"
···
  * @ptp_reg_init: PTP register initialization
  */
 struct idpf_reg_ops {
-	void (*ctlq_reg_init)(struct idpf_ctlq_create_info *cq);
+	void (*ctlq_reg_init)(struct idpf_adapter *adapter,
+			      struct idpf_ctlq_create_info *cq);
 	int (*intr_reg_init)(struct idpf_vport *vport);
 	void (*mb_intr_reg_init)(struct idpf_adapter *adapter);
 	void (*reset_reg_init)(struct idpf_adapter *adapter);
···
 	void (*ptp_reg_init)(const struct idpf_adapter *adapter);
 };
 
+#define IDPF_MMIO_REG_NUM_STATIC	2
+#define IDPF_PF_MBX_REGION_SZ		4096
+#define IDPF_PF_RSTAT_REGION_SZ		2048
+#define IDPF_VF_MBX_REGION_SZ		10240
+#define IDPF_VF_RSTAT_REGION_SZ		2048
+
 /**
  * struct idpf_dev_ops - Device specific operations
  * @reg_ops: Register operations
+ * @idc_init: IDC initialization
+ * @static_reg_info: array of mailbox and rstat register info
  */
 struct idpf_dev_ops {
 	struct idpf_reg_ops reg_ops;
+
+	int (*idc_init)(struct idpf_adapter *adapter);
+
+	/* static_reg_info[0] is mailbox region, static_reg_info[1] is rstat */
+	struct resource static_reg_info[IDPF_MMIO_REG_NUM_STATIC];
 };
 
 /**
···
  *	      group will yield total number of RX queues.
  * @rxq_model: Splitq queue or single queue queuing model
  * @rx_ptype_lkup: Lookup table for ptypes on RX
+ * @vdev_info: IDC vport device info pointer
  * @adapter: back pointer to associated adapter
  * @netdev: Associated net_device. Each vport should have one and only one
  *	    associated netdev.
···
 	struct idpf_rxq_group *rxq_grps;
 	u32 rxq_model;
 	struct libeth_rx_pt *rx_ptype_lkup;
+
+	struct iidc_rdma_vport_dev_info *vdev_info;
 
 	struct idpf_adapter *adapter;
 	struct net_device *netdev;
···
  * @flags: See enum idpf_flags
  * @reset_reg: See struct idpf_reset_reg
  * @hw: Device access data
- * @num_req_msix: Requested number of MSIX vectors
  * @num_avail_msix: Available number of MSIX vectors
  * @num_msix_entries: Number of entries in MSIX table
  * @msix_entries: MSIX table
+ * @num_rdma_msix_entries: Available number of MSIX vectors for RDMA
+ * @rdma_msix_entries: RDMA MSIX table
  * @req_vec_chunks: Requested vector chunk data
  * @mb_vector: Mailbox vector data
  * @vector_stack: Stack to store the msix vector indexes
···
  * @caps: Negotiated capabilities with device
  * @vcxn_mngr: Virtchnl transaction manager
  * @dev_ops: See idpf_dev_ops
+ * @cdev_info: IDC core device info pointer
  * @num_vfs: Number of allocated VFs through sysfs. PF does not directly talk
  *	     to VFs but is used to initialize them
  * @crc_enable: Enable CRC insertion offload
···
 	DECLARE_BITMAP(flags, IDPF_FLAGS_NBITS);
 	struct idpf_reset_reg reset_reg;
 	struct idpf_hw hw;
-	u16 num_req_msix;
 	u16 num_avail_msix;
 	u16 num_msix_entries;
 	struct msix_entry *msix_entries;
+	u16 num_rdma_msix_entries;
+	struct msix_entry *rdma_msix_entries;
 	struct virtchnl2_alloc_vectors *req_vec_chunks;
 	struct idpf_q_vector mb_vector;
 	struct idpf_vector_lifo vector_stack;
···
 	struct idpf_vc_xn_manager *vcxn_mngr;
 
 	struct idpf_dev_ops dev_ops;
+	struct iidc_rdma_core_dev_info *cdev_info;
 	int num_vfs;
 	bool crc_enable;
 	bool req_tx_splitq;
···
 
 bool idpf_is_capability_ena(struct idpf_adapter *adapter, bool all,
 			    enum idpf_cap_field field, u64 flag);
+
+/**
+ * idpf_is_rdma_cap_ena - Determine if RDMA is supported
+ * @adapter: private data struct
+ *
+ * Return: true if RDMA capability is enabled, false otherwise
+ */
+static inline bool idpf_is_rdma_cap_ena(struct idpf_adapter *adapter)
+{
+	return idpf_is_cap_ena(adapter, IDPF_OTHER_CAPS, VIRTCHNL2_CAP_RDMA);
+}
 
 #define IDPF_CAP_RSS (\
 	VIRTCHNL2_CAP_RSS_IPV4_TCP	|\
···
 }
 
 /**
+ * idpf_get_reserved_rdma_vecs - Get reserved RDMA vectors
+ * @adapter: private data struct
+ *
+ * Return: number of vectors reserved for RDMA
+ */
+static inline u16 idpf_get_reserved_rdma_vecs(struct idpf_adapter *adapter)
+{
+	return le16_to_cpu(adapter->caps.num_rdma_allocated_vectors);
+}
+
+/**
  * idpf_get_default_vports - Get default number of vports
  * @adapter: private data struct
  */
···
 }
 
 /**
+ * idpf_get_mbx_reg_addr - Get BAR0 mailbox register address
+ * @adapter: private data struct
+ * @reg_offset: register offset value
+ *
+ * Return: BAR0 mailbox register address based on register offset.
+ */
+static inline void __iomem *idpf_get_mbx_reg_addr(struct idpf_adapter *adapter,
+						  resource_size_t reg_offset)
+{
+	return adapter->hw.mbx.vaddr + reg_offset;
+}
+
+/**
+ * idpf_get_rstat_reg_addr - Get BAR0 rstat register address
+ * @adapter: private data struct
+ * @reg_offset: register offset value
+ *
+ * Return: BAR0 rstat register address based on register offset.
+ */
+static inline void __iomem *idpf_get_rstat_reg_addr(struct idpf_adapter *adapter,
+						    resource_size_t reg_offset)
+{
+	reg_offset -= adapter->dev_ops.static_reg_info[1].start;
+
+	return adapter->hw.rstat.vaddr + reg_offset;
+}
+
+/**
  * idpf_get_reg_addr - Get BAR0 register address
  * @adapter: private data struct
  * @reg_offset: register offset value
···
 static inline void __iomem *idpf_get_reg_addr(struct idpf_adapter *adapter,
 					      resource_size_t reg_offset)
 {
-	return (void __iomem *)(adapter->hw.hw_addr + reg_offset);
+	struct idpf_hw *hw = &adapter->hw;
+
+	for (int i = 0; i < hw->num_lan_regs; i++) {
+		struct idpf_mmio_reg *region = &hw->lan_regs[i];
+
+		if (reg_offset >= region->addr_start &&
+		    reg_offset < (region->addr_start + region->addr_len)) {
+			/* Convert the offset so that it is relative to the
+			 * start of the region.  Then add the base address of
+			 * the region to get the final address.
+			 */
+			reg_offset -= region->addr_start;
+
+			return region->vaddr + reg_offset;
+		}
+	}
+
+	/* It's impossible to hit this case with offsets from the CP. But if we
+	 * do for any other reason, the kernel will panic on that register
+	 * access. Might as well do it here to make it clear what's happening.
+	 */
+	BUG();
+
+	return NULL;
 }
 
 /**
···
 	if (!adapter->hw.arq)
 		return true;
 
-	return !(readl(idpf_get_reg_addr(adapter, adapter->hw.arq->reg.len)) &
+	return !(readl(idpf_get_mbx_reg_addr(adapter, adapter->hw.arq->reg.len)) &
 		 adapter->hw.arq->reg.len_mask);
 }
 
···
 
 u8 idpf_vport_get_hsplit(const struct idpf_vport *vport);
 bool idpf_vport_set_hsplit(const struct idpf_vport *vport, u8 val);
+int idpf_idc_init(struct idpf_adapter *adapter);
+int idpf_idc_init_aux_core_dev(struct idpf_adapter *adapter,
+			       enum iidc_function_type ftype);
+void idpf_idc_deinit_core_aux_device(struct iidc_rdma_core_dev_info *cdev_info);
+void idpf_idc_deinit_vport_aux_device(struct iidc_rdma_vport_dev_info *vdev_info);
+void idpf_idc_issue_reset_event(struct iidc_rdma_core_dev_info *cdev_info);
+void idpf_idc_vdev_mtu_event(struct iidc_rdma_vport_dev_info *vdev_info,
+			     enum iidc_rdma_event_type event_type);
 
 #endif /* !_IDPF_H_ */

drivers/net/ethernet/intel/idpf/idpf_controlq.c

···
 {
 	/* Update tail to post pre-allocated buffers for rx queues */
 	if (is_rxq)
-		wr32(hw, cq->reg.tail, (u32)(cq->ring_size - 1));
+		idpf_mbx_wr32(hw, cq->reg.tail, (u32)(cq->ring_size - 1));
 
 	/* For non-Mailbox control queues only TAIL need to be set */
 	if (cq->q_id != -1)
 		return;
 
 	/* Clear Head for both send or receive */
-	wr32(hw, cq->reg.head, 0);
+	idpf_mbx_wr32(hw, cq->reg.head, 0);
 
 	/* set starting point */
-	wr32(hw, cq->reg.bal, lower_32_bits(cq->desc_ring.pa));
-	wr32(hw, cq->reg.bah, upper_32_bits(cq->desc_ring.pa));
-	wr32(hw, cq->reg.len, (cq->ring_size | cq->reg.len_ena_mask));
+	idpf_mbx_wr32(hw, cq->reg.bal, lower_32_bits(cq->desc_ring.pa));
+	idpf_mbx_wr32(hw, cq->reg.bah, upper_32_bits(cq->desc_ring.pa));
+	idpf_mbx_wr32(hw, cq->reg.len, (cq->ring_size | cq->reg.len_ena_mask));
 }
 
 /**
···
 	 */
 	dma_wmb();
 
-	wr32(hw, cq->reg.tail, cq->next_to_use);
+	idpf_mbx_wr32(hw, cq->reg.tail, cq->next_to_use);
 
 err_unlock:
 	spin_unlock(&cq->cq_lock);
···
 
 		dma_wmb();
 
-		wr32(hw, cq->reg.tail, cq->next_to_post);
+		idpf_mbx_wr32(hw, cq->reg.tail, cq->next_to_post);
 	}
 
 	spin_unlock(&cq->cq_lock);

drivers/net/ethernet/intel/idpf/idpf_controlq.h

···
 	u32 pf_vf_id;		/* used by CP when sending to PF */
 };
 
+/* Max number of MMIO regions not including the mailbox and rstat regions in
+ * the fallback case when the whole bar is mapped.
+ */
+#define IDPF_MMIO_MAP_FALLBACK_MAX_REMAINING		3
+
+struct idpf_mmio_reg {
+	void __iomem *vaddr;
+	resource_size_t addr_start;
+	resource_size_t addr_len;
+};
+
 /* Define the driver hardware struct to replace other control structs as needed
  * Align to ctlq_hw_info
  */
 struct idpf_hw {
-	void __iomem *hw_addr;
-	resource_size_t hw_addr_len;
+	struct idpf_mmio_reg mbx;
+	struct idpf_mmio_reg rstat;
+	/* Array of remaining LAN BAR regions */
+	int num_lan_regs;
+	struct idpf_mmio_reg *lan_regs;
 
 	struct idpf_adapter *back;
 

drivers/net/ethernet/intel/idpf/idpf_dev.c

···
 
 /**
  * idpf_ctlq_reg_init - initialize default mailbox registers
+ * @adapter: adapter structure
  * @cq: pointer to the array of create control queues
  */
-static void idpf_ctlq_reg_init(struct idpf_ctlq_create_info *cq)
+static void idpf_ctlq_reg_init(struct idpf_adapter *adapter,
+			       struct idpf_ctlq_create_info *cq)
 {
+	resource_size_t mbx_start = adapter->dev_ops.static_reg_info[0].start;
 	int i;
 
 	for (i = 0; i < IDPF_NUM_DFLT_MBX_Q; i++) {
···
 		switch (ccq->type) {
 		case IDPF_CTLQ_TYPE_MAILBOX_TX:
 			/* set head and tail registers in our local struct */
-			ccq->reg.head = PF_FW_ATQH;
-			ccq->reg.tail = PF_FW_ATQT;
-			ccq->reg.len = PF_FW_ATQLEN;
-			ccq->reg.bah = PF_FW_ATQBAH;
-			ccq->reg.bal = PF_FW_ATQBAL;
+			ccq->reg.head = PF_FW_ATQH - mbx_start;
+			ccq->reg.tail = PF_FW_ATQT - mbx_start;
+			ccq->reg.len = PF_FW_ATQLEN - mbx_start;
+			ccq->reg.bah = PF_FW_ATQBAH - mbx_start;
+			ccq->reg.bal = PF_FW_ATQBAL - mbx_start;
 			ccq->reg.len_mask = PF_FW_ATQLEN_ATQLEN_M;
 			ccq->reg.len_ena_mask = PF_FW_ATQLEN_ATQENABLE_M;
 			ccq->reg.head_mask = PF_FW_ATQH_ATQH_M;
 			break;
 		case IDPF_CTLQ_TYPE_MAILBOX_RX:
 			/* set head and tail registers in our local struct */
-			ccq->reg.head = PF_FW_ARQH;
-			ccq->reg.tail = PF_FW_ARQT;
-			ccq->reg.len = PF_FW_ARQLEN;
-			ccq->reg.bah = PF_FW_ARQBAH;
-			ccq->reg.bal = PF_FW_ARQBAL;
+			ccq->reg.head = PF_FW_ARQH - mbx_start;
+			ccq->reg.tail = PF_FW_ARQT - mbx_start;
+			ccq->reg.len = PF_FW_ARQLEN - mbx_start;
+			ccq->reg.bah = PF_FW_ARQBAH - mbx_start;
+			ccq->reg.bal = PF_FW_ARQBAL - mbx_start;
 			ccq->reg.len_mask = PF_FW_ARQLEN_ARQLEN_M;
 			ccq->reg.len_ena_mask = PF_FW_ARQLEN_ARQENABLE_M;
 			ccq->reg.head_mask = PF_FW_ARQH_ARQH_M;
···
  */
 static void idpf_reset_reg_init(struct idpf_adapter *adapter)
 {
-	adapter->reset_reg.rstat = idpf_get_reg_addr(adapter, PFGEN_RSTAT);
+	adapter->reset_reg.rstat = idpf_get_rstat_reg_addr(adapter, PFGEN_RSTAT);
 	adapter->reset_reg.rstat_m = PFGEN_RSTAT_PFR_STATE_M;
 }
 
···
 {
 	u32 reset_reg;
 
-	reset_reg = readl(idpf_get_reg_addr(adapter, PFGEN_CTRL));
+	reset_reg = readl(idpf_get_rstat_reg_addr(adapter, PFGEN_CTRL));
 	writel(reset_reg | PFGEN_CTRL_PFSWR,
-	       idpf_get_reg_addr(adapter, PFGEN_CTRL));
+	       idpf_get_rstat_reg_addr(adapter, PFGEN_CTRL));
 }
 
 /**
···
 {
 	adapter->ptp->cmd.shtime_enable_mask = PF_GLTSYN_CMD_SYNC_SHTIME_EN_M;
 	adapter->ptp->cmd.exec_cmd_mask = PF_GLTSYN_CMD_SYNC_EXEC_CMD_M;
+}
+
+/**
+ * idpf_idc_register - register for IDC callbacks
+ * @adapter: Driver specific private structure
+ *
+ * Return: 0 on success or error code on failure.
+ */
+static int idpf_idc_register(struct idpf_adapter *adapter)
+{
+	return idpf_idc_init_aux_core_dev(adapter, IIDC_FUNCTION_TYPE_PF);
 }
 
 /**
···
 void idpf_dev_ops_init(struct idpf_adapter *adapter)
 {
 	idpf_reg_ops_init(adapter);
+
+	adapter->dev_ops.idc_init = idpf_idc_register;
+
+	resource_set_range(&adapter->dev_ops.static_reg_info[0],
+			   PF_FW_BASE, IDPF_PF_MBX_REGION_SZ);
+	resource_set_range(&adapter->dev_ops.static_reg_info[1],
+			   PFGEN_RTRIG, IDPF_PF_RSTAT_REGION_SZ);
 }

drivers/net/ethernet/intel/idpf/idpf_idc.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (C) 2025 Intel Corporation */
+
+#include <linux/export.h>
+
+#include "idpf.h"
+#include "idpf_virtchnl.h"
+
+static DEFINE_IDA(idpf_idc_ida);
+
+#define IDPF_IDC_MAX_ADEV_NAME_LEN	15
+
+/**
+ * idpf_idc_init - Called to initialize IDC
+ * @adapter: driver private data structure
+ *
+ * Return: 0 on success or cap not enabled, error code on failure.
+ */
+int idpf_idc_init(struct idpf_adapter *adapter)
+{
+	int err;
+
+	if (!idpf_is_rdma_cap_ena(adapter) ||
+	    !adapter->dev_ops.idc_init)
+		return 0;
+
+	err = adapter->dev_ops.idc_init(adapter);
+	if (err)
+		dev_err(&adapter->pdev->dev, "failed to initialize idc: %d\n",
+			err);
+
+	return err;
+}
+
+/**
+ * idpf_vport_adev_release - function to be mapped to aux dev's release op
+ * @dev: pointer to device to free
+ */
+static void idpf_vport_adev_release(struct device *dev)
+{
+	struct iidc_rdma_vport_auxiliary_dev *iadev;
+
+	iadev = container_of(dev, struct iidc_rdma_vport_auxiliary_dev, adev.dev);
+	kfree(iadev);
+	iadev = NULL;
+}
+
+/**
+ * idpf_plug_vport_aux_dev - allocate and register a vport Auxiliary device
+ * @cdev_info: IDC core device info pointer
+ * @vdev_info: IDC vport device info pointer
+ *
+ * Return: 0 on success or error code on failure.
+ */
+static int idpf_plug_vport_aux_dev(struct iidc_rdma_core_dev_info *cdev_info,
+				   struct iidc_rdma_vport_dev_info *vdev_info)
+{
+	struct iidc_rdma_vport_auxiliary_dev *iadev;
+	char name[IDPF_IDC_MAX_ADEV_NAME_LEN];
+	struct auxiliary_device *adev;
+	int ret;
+
+	iadev = kzalloc(sizeof(*iadev), GFP_KERNEL);
+	if (!iadev)
+		return -ENOMEM;
+
+	adev = &iadev->adev;
+	vdev_info->adev = &iadev->adev;
+	iadev->vdev_info = vdev_info;
+
+	ret = ida_alloc(&idpf_idc_ida, GFP_KERNEL);
+	if (ret < 0) {
+		pr_err("failed to allocate unique device ID for Auxiliary driver\n");
+		goto err_ida_alloc;
+	}
+	adev->id = ret;
+	adev->dev.release = idpf_vport_adev_release;
+	adev->dev.parent = &cdev_info->pdev->dev;
+	sprintf(name, "%04x.rdma.vdev", cdev_info->pdev->vendor);
+	adev->name = name;
+
+	ret = auxiliary_device_init(adev);
+	if (ret)
+		goto err_aux_dev_init;
+
+	ret = auxiliary_device_add(adev);
+	if (ret)
+		goto err_aux_dev_add;
+
+	return 0;
+
+err_aux_dev_add:
+	auxiliary_device_uninit(adev);
+err_aux_dev_init:
+	ida_free(&idpf_idc_ida, adev->id);
+err_ida_alloc:
+	vdev_info->adev = NULL;
+	kfree(iadev);
+
+	return ret;
+}
+
+/**
+ * idpf_idc_init_aux_vport_dev - initialize vport Auxiliary Device(s)
+ * @vport: virtual port data struct
+ *
+ * Return: 0 on success or error code on failure.
+ */
+static int idpf_idc_init_aux_vport_dev(struct idpf_vport *vport)
+{
+	struct idpf_adapter *adapter = vport->adapter;
+	struct iidc_rdma_vport_dev_info *vdev_info;
+	struct iidc_rdma_core_dev_info *cdev_info;
+	struct virtchnl2_create_vport *vport_msg;
+	int err;
+
+	vport_msg = (struct virtchnl2_create_vport *)
+			adapter->vport_params_recvd[vport->idx];
+
+	if (!(le16_to_cpu(vport_msg->vport_flags) & VIRTCHNL2_VPORT_ENABLE_RDMA))
+		return 0;
+
+	vport->vdev_info = kzalloc(sizeof(*vdev_info), GFP_KERNEL);
+	if (!vport->vdev_info)
+		return -ENOMEM;
+
+	cdev_info = vport->adapter->cdev_info;
+
+	vdev_info = vport->vdev_info;
+	vdev_info->vport_id = vport->vport_id;
+	vdev_info->netdev = vport->netdev;
+	vdev_info->core_adev = cdev_info->adev;
+
+	err = idpf_plug_vport_aux_dev(cdev_info, vdev_info);
+	if (err) {
+		vport->vdev_info = NULL;
+		kfree(vdev_info);
+		return err;
+	}
+
+	return 0;
+}
+
+/**
+ * idpf_idc_vdev_mtu_event - Function to handle IDC vport mtu change events
+ * @vdev_info: IDC vport device info pointer
+ * @event_type: type of event to pass to handler
+ */
+void idpf_idc_vdev_mtu_event(struct iidc_rdma_vport_dev_info *vdev_info,
+			     enum iidc_rdma_event_type event_type)
+{
+	struct iidc_rdma_vport_auxiliary_drv *iadrv;
+	struct iidc_rdma_event event = { };
+	struct auxiliary_device *adev;
+
+	if (!vdev_info)
+		/* RDMA is not enabled */
+		return;
+
+	set_bit(event_type, event.type);
+
+	device_lock(&vdev_info->adev->dev);
+	adev = vdev_info->adev;
+	if (!adev || !adev->dev.driver)
+		goto unlock;
+	iadrv = container_of(adev->dev.driver,
+			     struct iidc_rdma_vport_auxiliary_drv,
+			     adrv.driver);
+	if (iadrv->event_handler)
+		iadrv->event_handler(vdev_info, &event);
+unlock:
+	device_unlock(&vdev_info->adev->dev);
+}
+
+/**
+ * idpf_core_adev_release - function to be mapped to aux dev's release op
+ * @dev: pointer to device to free
+ */
+static void idpf_core_adev_release(struct device *dev)
+{
+	struct iidc_rdma_core_auxiliary_dev *iadev;
+
+	iadev = container_of(dev, struct iidc_rdma_core_auxiliary_dev, adev.dev);
+	kfree(iadev);
+	iadev = NULL;
+}
+
+/**
+ * idpf_plug_core_aux_dev - allocate and register an Auxiliary device
+ * @cdev_info: IDC core device info pointer
+ *
+ * Return: 0 on success or error code on failure.
+ */
+static int idpf_plug_core_aux_dev(struct iidc_rdma_core_dev_info *cdev_info)
+{
+	struct iidc_rdma_core_auxiliary_dev *iadev;
+	char name[IDPF_IDC_MAX_ADEV_NAME_LEN];
+	struct auxiliary_device *adev;
+	int ret;
+
+	iadev = kzalloc(sizeof(*iadev), GFP_KERNEL);
+	if (!iadev)
+		return -ENOMEM;
+
+	adev = &iadev->adev;
+	cdev_info->adev = adev;
+	iadev->cdev_info = cdev_info;
+
+	ret = ida_alloc(&idpf_idc_ida, GFP_KERNEL);
+	if (ret < 0) {
+		pr_err("failed to allocate unique device ID for Auxiliary driver\n");
+		goto err_ida_alloc;
+	}
+	adev->id = ret;
+	adev->dev.release = idpf_core_adev_release;
+	adev->dev.parent = &cdev_info->pdev->dev;
+	sprintf(name, "%04x.rdma.core", cdev_info->pdev->vendor);
+	adev->name = name;
+
+	ret = auxiliary_device_init(adev);
+	if (ret)
+		goto err_aux_dev_init;
+
+	ret = auxiliary_device_add(adev);
+	if (ret)
+		goto err_aux_dev_add;
+
+	return 0;
+
+err_aux_dev_add:
+	auxiliary_device_uninit(adev);
+err_aux_dev_init:
+	ida_free(&idpf_idc_ida, adev->id);
+err_ida_alloc:
+	cdev_info->adev = NULL;
+	kfree(iadev);
+
+	return ret;
+}
+
+/**
+ * idpf_unplug_aux_dev - unregister and free an Auxiliary device
+ * @adev: auxiliary device struct
+ */
+static void idpf_unplug_aux_dev(struct auxiliary_device *adev)
+{
+	if (!adev)
+		return;
+
+	auxiliary_device_delete(adev);
+	auxiliary_device_uninit(adev);
+
+	ida_free(&idpf_idc_ida, adev->id);
+}
+
+/**
+ * idpf_idc_issue_reset_event - Function to handle reset IDC event
+ * @cdev_info: IDC core device info pointer
+ */
+void idpf_idc_issue_reset_event(struct iidc_rdma_core_dev_info *cdev_info)
+{
+	enum iidc_rdma_event_type event_type = IIDC_RDMA_EVENT_WARN_RESET;
+	struct iidc_rdma_core_auxiliary_drv *iadrv;
+	struct iidc_rdma_event event = { };
+	struct auxiliary_device *adev;
+
+	if (!cdev_info)
+		/* RDMA is not enabled */
+		return;
+
+	set_bit(event_type, event.type);
+
+	device_lock(&cdev_info->adev->dev);
+
+	adev = cdev_info->adev;
+	if (!adev || !adev->dev.driver)
+		goto unlock;
+
+	iadrv = container_of(adev->dev.driver,
+			     struct iidc_rdma_core_auxiliary_drv,
+			     adrv.driver);
+	if (iadrv->event_handler)
+		iadrv->event_handler(cdev_info, &event);
+unlock:
+	device_unlock(&cdev_info->adev->dev);
+}
+
+/**
+ * idpf_idc_vport_dev_up - called when CORE is ready for vport aux devs
+ * @adapter: private data struct
+ *
+ * Return: 0 on success or error code on failure.
+ */
+static int idpf_idc_vport_dev_up(struct idpf_adapter *adapter)
+{
+	int i, err = 0;
+
+	for (i = 0; i < adapter->num_alloc_vports; i++) {
+		struct idpf_vport *vport = adapter->vports[i];
+
+		if (!vport)
+			continue;
+
+		if (!vport->vdev_info)
+			err = idpf_idc_init_aux_vport_dev(vport);
+		else
+			err = idpf_plug_vport_aux_dev(vport->adapter->cdev_info,
+						      vport->vdev_info);
+	}
+
+	return err;
+}
+
+/**
+ * idpf_idc_vport_dev_down - called CORE is leaving vport aux dev support state
+ * @adapter: private data struct
+ */
+static void idpf_idc_vport_dev_down(struct idpf_adapter *adapter)
+{
+	int i;
+
+	for (i = 0; i < adapter->num_alloc_vports; i++) {
+		struct idpf_vport *vport = adapter->vports[i];
+
+		if (!vport)
+			continue;
+
+		idpf_unplug_aux_dev(vport->vdev_info->adev);
+		vport->vdev_info->adev = NULL;
+	}
+}
+
+/**
+ * idpf_idc_vport_dev_ctrl - Called by an Auxiliary Driver
+ * @cdev_info: IDC core device info pointer
+ * @up: RDMA core driver status
+ *
+ * This callback function is accessed by an Auxiliary Driver to indicate
+ * whether core driver is ready to support vport driver load or if vport
+ * drivers need to be taken down.
+ *
+ * Return: 0 on success or error code on failure.
+ */
+int idpf_idc_vport_dev_ctrl(struct iidc_rdma_core_dev_info *cdev_info, bool up)
+{
+	struct idpf_adapter *adapter = pci_get_drvdata(cdev_info->pdev);
+
+	if (up)
+		return idpf_idc_vport_dev_up(adapter);
+
+	idpf_idc_vport_dev_down(adapter);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(idpf_idc_vport_dev_ctrl);
+
+/**
+ * idpf_idc_request_reset - Called by an Auxiliary Driver
+ * @cdev_info: IDC core device info pointer
+ * @reset_type: function, core or other
+ *
+ * This callback function is accessed by an Auxiliary Driver to request a reset
+ * on the Auxiliary Device.
+ *
+ * Return: 0 on success or error code on failure.
+ */
+int idpf_idc_request_reset(struct iidc_rdma_core_dev_info *cdev_info,
+			   enum iidc_rdma_reset_type __always_unused reset_type)
+{
+	struct idpf_adapter *adapter = pci_get_drvdata(cdev_info->pdev);
+
+	if (!idpf_is_reset_in_prog(adapter)) {
+		set_bit(IDPF_HR_FUNC_RESET, adapter->flags);
+		queue_delayed_work(adapter->vc_event_wq,
+				   &adapter->vc_event_task,
+				   msecs_to_jiffies(10));
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(idpf_idc_request_reset);
+
+/**
+ * idpf_idc_init_msix_data - initialize MSIX data for the cdev_info structure
+ * @adapter: driver private data structure
+ */
+static void
+idpf_idc_init_msix_data(struct idpf_adapter *adapter)
+{
+	struct iidc_rdma_core_dev_info *cdev_info;
+	struct iidc_rdma_priv_dev_info *privd;
+
+	if (!adapter->rdma_msix_entries)
+		return;
+
+	cdev_info = adapter->cdev_info;
+	privd = cdev_info->iidc_priv;
+
+	privd->msix_entries = adapter->rdma_msix_entries;
+	privd->msix_count = adapter->num_rdma_msix_entries;
+}
+
+/**
+ * idpf_idc_init_aux_core_dev - initialize Auxiliary Device(s)
+ * @adapter: driver private data structure
+ * @ftype: PF or VF
+ *
+ * Return: 0 on success or error code on failure.
+ */
+int idpf_idc_init_aux_core_dev(struct idpf_adapter *adapter,
+			       enum iidc_function_type ftype)
+{
+	struct iidc_rdma_core_dev_info *cdev_info;
+	struct iidc_rdma_priv_dev_info *privd;
+	int err, i;
+
+	adapter->cdev_info = kzalloc(sizeof(*cdev_info), GFP_KERNEL);
+	if (!adapter->cdev_info)
+		return -ENOMEM;
+	cdev_info = adapter->cdev_info;
+
+	privd = kzalloc(sizeof(*privd), GFP_KERNEL);
+	if (!privd) {
+		err = -ENOMEM;
+		goto err_privd_alloc;
+	}
+
+	cdev_info->iidc_priv = privd;
+	cdev_info->pdev = adapter->pdev;
+	cdev_info->rdma_protocol = IIDC_RDMA_PROTOCOL_ROCEV2;
+	privd->ftype = ftype;
+
+	privd->mapped_mem_regions =
+		kcalloc(adapter->hw.num_lan_regs,
+			sizeof(struct iidc_rdma_lan_mapped_mem_region),
+			GFP_KERNEL);
+	if (!privd->mapped_mem_regions) {
+		err = -ENOMEM;
+		goto err_plug_aux_dev;
+	}
+
+	privd->num_memory_regions = cpu_to_le16(adapter->hw.num_lan_regs);
+	for (i = 0; i < adapter->hw.num_lan_regs; i++) {
+		privd->mapped_mem_regions[i].region_addr =
+			adapter->hw.lan_regs[i].vaddr;
+		privd->mapped_mem_regions[i].size =
+			cpu_to_le64(adapter->hw.lan_regs[i].addr_len);
+		privd->mapped_mem_regions[i].start_offset =
+			cpu_to_le64(adapter->hw.lan_regs[i].addr_start);
+	}
+
+	idpf_idc_init_msix_data(adapter);
+
+	err = idpf_plug_core_aux_dev(cdev_info);
+	if (err)
+		goto err_free_mem_regions;
+
+	return 0;
+
+err_free_mem_regions:
+	kfree(privd->mapped_mem_regions);
+	privd->mapped_mem_regions = NULL;
+err_plug_aux_dev:
+	kfree(privd);
+err_privd_alloc:
+	kfree(cdev_info);
+	adapter->cdev_info = NULL;
+
+	return err;
+}
+
+/**
+ * idpf_idc_deinit_core_aux_device - de-initialize Auxiliary Device(s)
+ * @cdev_info: IDC core device info pointer
+ */
+void idpf_idc_deinit_core_aux_device(struct iidc_rdma_core_dev_info *cdev_info)
+{
+	struct iidc_rdma_priv_dev_info *privd;
+
+	if (!cdev_info)
+		return;
+
+	idpf_unplug_aux_dev(cdev_info->adev);
+
+	privd = cdev_info->iidc_priv;
+	kfree(privd->mapped_mem_regions);
+	kfree(privd);
+	kfree(cdev_info);
+}
+
+/**
+ * idpf_idc_deinit_vport_aux_device - de-initialize Auxiliary Device(s)
+ * @vdev_info: IDC vport device info pointer
+ */
+void idpf_idc_deinit_vport_aux_device(struct iidc_rdma_vport_dev_info *vdev_info)
+{
+	if (!vdev_info)
+		return;
+
+	idpf_unplug_aux_dev(vdev_info->adev);
+
+	kfree(vdev_info);
+}

drivers/net/ethernet/intel/idpf/idpf_lib.c

···
 	idpf_deinit_vector_stack(adapter);
 	kfree(adapter->msix_entries);
 	adapter->msix_entries = NULL;
+	kfree(adapter->rdma_msix_entries);
+	adapter->rdma_msix_entries = NULL;
 }
 
 /**
···
  */
 int idpf_intr_req(struct idpf_adapter *adapter)
 {
+	u16 num_lan_vecs, min_lan_vecs, num_rdma_vecs = 0, min_rdma_vecs = 0;
 	u16 default_vports = idpf_get_default_vports(adapter);
 	int num_q_vecs, total_vecs, num_vec_ids;
-	int min_vectors, v_actual, err;
+	int min_vectors, actual_vecs, err;
 	unsigned int vector;
 	u16 *vecids;
+	int i;
 
 	total_vecs = idpf_get_reserved_vecs(adapter);
+	num_lan_vecs = total_vecs;
+	if (idpf_is_rdma_cap_ena(adapter)) {
+		num_rdma_vecs = idpf_get_reserved_rdma_vecs(adapter);
+		min_rdma_vecs = IDPF_MIN_RDMA_VEC;
+
+		if (!num_rdma_vecs) {
+			/* If idpf_get_reserved_rdma_vecs is 0, vectors are
+			 * pulled from the LAN pool.
+			 */
+			num_rdma_vecs = min_rdma_vecs;
+		} else if (num_rdma_vecs < min_rdma_vecs) {
+			dev_err(&adapter->pdev->dev,
+				"Not enough vectors reserved for RDMA (min: %u, current: %u)\n",
+				min_rdma_vecs, num_rdma_vecs);
+			return -EINVAL;
+		}
+	}
+
 	num_q_vecs = total_vecs - IDPF_MBX_Q_VEC;
 
 	err = idpf_send_alloc_vectors_msg(adapter, num_q_vecs);
···
 		return -EAGAIN;
 	}
 
-	min_vectors = IDPF_MBX_Q_VEC + IDPF_MIN_Q_VEC * default_vports;
-	v_actual = pci_alloc_irq_vectors(adapter->pdev, min_vectors,
-					 total_vecs, PCI_IRQ_MSIX);
-	if (v_actual < min_vectors) {
-		dev_err(&adapter->pdev->dev, "Failed to allocate MSIX vectors: %d\n",
-			v_actual);
-		err = -EAGAIN;
+	min_lan_vecs = IDPF_MBX_Q_VEC + IDPF_MIN_Q_VEC * default_vports;
+	min_vectors = min_lan_vecs + min_rdma_vecs;
+	actual_vecs = pci_alloc_irq_vectors(adapter->pdev, min_vectors,
+					    total_vecs, PCI_IRQ_MSIX);
+	if (actual_vecs < 0) {
+		dev_err(&adapter->pdev->dev, "Failed to allocate minimum MSIX vectors required: %d\n",
+			min_vectors);
+		err = actual_vecs;
 		goto send_dealloc_vecs;
 	}
 
-	adapter->msix_entries = kcalloc(v_actual, sizeof(struct msix_entry),
-					GFP_KERNEL);
+	if (idpf_is_rdma_cap_ena(adapter)) {
+		if (actual_vecs < total_vecs) {
+			dev_warn(&adapter->pdev->dev,
+				 "Warning: %d vectors requested, only %d available. Defaulting to minimum (%d) for RDMA and remaining for LAN.\n",
+				 total_vecs, actual_vecs, IDPF_MIN_RDMA_VEC);
+			num_rdma_vecs = IDPF_MIN_RDMA_VEC;
+		}
 
+		adapter->rdma_msix_entries = kcalloc(num_rdma_vecs,
+						     sizeof(struct msix_entry),
+						     GFP_KERNEL);
+		if (!adapter->rdma_msix_entries) {
+			err = -ENOMEM;
+			goto free_irq;
+		}
+	}
+
+	num_lan_vecs = actual_vecs - num_rdma_vecs;
+	adapter->msix_entries = kcalloc(num_lan_vecs, sizeof(struct msix_entry),
+					GFP_KERNEL);
 	if (!adapter->msix_entries) {
 		err = -ENOMEM;
-		goto free_irq;
+		goto free_rdma_msix;
 	}
 
 	adapter->mb_vector.v_idx = le16_to_cpu(adapter->caps.mailbox_vector_id);
 
-	vecids = kcalloc(total_vecs, sizeof(u16), GFP_KERNEL);
+	vecids = kcalloc(actual_vecs, sizeof(u16), GFP_KERNEL);
 	if (!vecids) {
 		err = -ENOMEM;
 		goto free_msix;
 	}
 
-	num_vec_ids = idpf_get_vec_ids(adapter, vecids, total_vecs,
+	num_vec_ids = idpf_get_vec_ids(adapter, vecids, actual_vecs,
 				       &adapter->req_vec_chunks->vchunks);
-	if (num_vec_ids < v_actual) {
+	if (num_vec_ids < actual_vecs) {
 		err = -EINVAL;
 		goto free_vecids;
 	}
 
-	for (vector = 0; vector < v_actual; vector++) {
+	for (vector = 0; vector < num_lan_vecs; vector++) {
 		adapter->msix_entries[vector].entry = vecids[vector];
 		adapter->msix_entries[vector].vector =
 			pci_irq_vector(adapter->pdev, vector);
 	}
+	for (i = 0; i < num_rdma_vecs; vector++, i++) {
+		adapter->rdma_msix_entries[i].entry = vecids[vector];
+		adapter->rdma_msix_entries[i].vector =
+			pci_irq_vector(adapter->pdev, vector);
+	}
 
-	adapter->num_req_msix = total_vecs;
-	adapter->num_msix_entries = v_actual;
 	/* 'num_avail_msix' is used to distribute excess vectors to the vports
 	 * after considering the minimum vectors required per each default
 	 * vport
 	 */
-	adapter->num_avail_msix = v_actual - min_vectors;
+	adapter->num_avail_msix = num_lan_vecs - min_lan_vecs;
+	adapter->num_msix_entries = num_lan_vecs;
+	if (idpf_is_rdma_cap_ena(adapter))
+		adapter->num_rdma_msix_entries = num_rdma_vecs;
 
 	/* Fill MSIX vector lifo stack with vector indexes */
 	err = idpf_init_vector_stack(adapter);
···
 free_msix:
 	kfree(adapter->msix_entries);
 	adapter->msix_entries = NULL;
+free_rdma_msix:
+	kfree(adapter->rdma_msix_entries);
+	adapter->rdma_msix_entries = NULL;
 free_irq:
 	pci_free_irq_vectors(adapter->pdev);
 send_dealloc_vecs:
···
 {
 	struct idpf_adapter *adapter = vport->adapter;
 	unsigned int i = vport->idx;
+
+	idpf_idc_deinit_vport_aux_device(vport->vdev_info);
 
 	idpf_deinit_mac_addr(vport);
 	idpf_vport_stop(vport);
···
 	} else if (test_and_clear_bit(IDPF_HR_FUNC_RESET, adapter->flags)) {
 		bool is_reset = idpf_is_reset_detected(adapter);
 
+		idpf_idc_issue_reset_event(adapter->cdev_info);
+
 		idpf_set_vport_state(adapter);
 		idpf_vc_core_deinit(adapter);
 		if (!is_reset)
···
 
 unlock_mutex:
 	mutex_unlock(&adapter->vport_ctrl_lock);
+
+	/* Wait until all vports are created to init RDMA CORE AUX */
+	if (!err)
+		err = idpf_idc_init(adapter);
 
 	return err;
 }
···
 		idpf_vport_calc_num_q_desc(new_vport);
 		break;
 	case IDPF_SR_MTU_CHANGE:
+		idpf_idc_vdev_mtu_event(vport->vdev_info,
+					IIDC_RDMA_EVENT_BEFORE_MTU_CHANGE);
+		break;
 	case IDPF_SR_RSC_CHANGE:
 		break;
 	default:
···
 	if (current_state == __IDPF_VPORT_UP)
 		err = idpf_vport_open(vport);
 
-	kfree(new_vport);
-
-	return err;
+	goto free_vport;
 
 err_reset:
 	idpf_send_add_queues_msg(vport, vport->num_txq, vport->num_complq,
···
 
 free_vport:
 	kfree(new_vport);
+
+	if (reset_cause == IDPF_SR_MTU_CHANGE)
+		idpf_idc_vdev_mtu_event(vport->vdev_info,
+					IIDC_RDMA_EVENT_AFTER_MTU_CHANGE);
 
 	return err;
 }

drivers/net/ethernet/intel/idpf/idpf_main.c

···
  */
 static int idpf_cfg_hw(struct idpf_adapter *adapter)
 {
+	resource_size_t res_start, mbx_start, rstat_start;
 	struct pci_dev *pdev = adapter->pdev;
 	struct idpf_hw *hw = &adapter->hw;
+	struct device *dev = &pdev->dev;
+	long len;
 
-	hw->hw_addr = pcim_iomap_table(pdev)[0];
-	if (!hw->hw_addr) {
-		pci_err(pdev, "failed to allocate PCI iomap table\n");
+	res_start = pci_resource_start(pdev, 0);
+
+	/* Map mailbox space for virtchnl communication */
+	mbx_start = res_start + adapter->dev_ops.static_reg_info[0].start;
+	len = resource_size(&adapter->dev_ops.static_reg_info[0]);
+	hw->mbx.vaddr = devm_ioremap(dev, mbx_start, len);
+	if (!hw->mbx.vaddr) {
+		pci_err(pdev, "failed to allocate BAR0 mbx region\n");
 
 		return -ENOMEM;
 	}
+	hw->mbx.addr_start = adapter->dev_ops.static_reg_info[0].start;
+	hw->mbx.addr_len = len;
+
+	/* Map rstat space for resets */
+	rstat_start = res_start + adapter->dev_ops.static_reg_info[1].start;
+	len = resource_size(&adapter->dev_ops.static_reg_info[1]);
+	hw->rstat.vaddr = devm_ioremap(dev, rstat_start, len);
+	if (!hw->rstat.vaddr) {
+		pci_err(pdev, "failed to allocate BAR0 rstat region\n");
+
+		return -ENOMEM;
+	}
+	hw->rstat.addr_start = adapter->dev_ops.static_reg_info[1].start;
+	hw->rstat.addr_len = len;
 
 	hw->back = adapter;
 
···
 	if (err)
 		goto err_free;
 
-	err = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
+	err = pcim_request_region(pdev, 0, pci_name(pdev));
 	if (err) {
-		pci_err(pdev, "pcim_iomap_regions failed %pe\n", ERR_PTR(err));
+		pci_err(pdev, "pcim_request_region failed %pe\n", ERR_PTR(err));
 
 		goto err_free;
 	}

drivers/net/ethernet/intel/idpf/idpf_mem.h

···
 	size_t size;
 };
 
-#define wr32(a, reg, value)	writel((value), ((a)->hw_addr + (reg)))
-#define rd32(a, reg)		readl((a)->hw_addr + (reg))
-#define wr64(a, reg, value)	writeq((value), ((a)->hw_addr + (reg)))
-#define rd64(a, reg)		readq((a)->hw_addr + (reg))
+#define idpf_mbx_wr32(a, reg, value)	writel((value), ((a)->mbx.vaddr + (reg)))
+#define idpf_mbx_rd32(a, reg)		readl((a)->mbx.vaddr + (reg))
+#define idpf_mbx_wr64(a, reg, value)	writeq((value), ((a)->mbx.vaddr + (reg)))
+#define idpf_mbx_rd64(a, reg)		readq((a)->mbx.vaddr + (reg))
 
 #endif /* _IDPF_MEM_H_ */

drivers/net/ethernet/intel/idpf/idpf_txrx.h

···
 /* Default vector sharing */
 #define IDPF_MBX_Q_VEC		1
 #define IDPF_MIN_Q_VEC		1
+#define IDPF_MIN_RDMA_VEC	2
 
 #define IDPF_DFLT_TX_Q_DESC_COUNT		512
 #define IDPF_DFLT_TX_COMPLQ_DESC_COUNT		512

drivers/net/ethernet/intel/idpf/idpf_vf_dev.c

···
 
 /**
  * idpf_vf_ctlq_reg_init - initialize default mailbox registers
+ * @adapter: adapter structure
  * @cq: pointer to the array of create control queues
  */
-static void idpf_vf_ctlq_reg_init(struct idpf_ctlq_create_info *cq)
+static void idpf_vf_ctlq_reg_init(struct idpf_adapter *adapter,
+				  struct idpf_ctlq_create_info *cq)
 {
+	resource_size_t mbx_start = adapter->dev_ops.static_reg_info[0].start;
 	int i;
 
 	for (i = 0; i < IDPF_NUM_DFLT_MBX_Q; i++) {
···
 		switch (ccq->type) {
 		case IDPF_CTLQ_TYPE_MAILBOX_TX:
 			/* set head and tail registers in our local struct */
-			ccq->reg.head = VF_ATQH;
-			ccq->reg.tail = VF_ATQT;
-			ccq->reg.len = VF_ATQLEN;
-			ccq->reg.bah = VF_ATQBAH;
-			ccq->reg.bal = VF_ATQBAL;
+			ccq->reg.head = VF_ATQH - mbx_start;
+			ccq->reg.tail = VF_ATQT - mbx_start;
+			ccq->reg.len = VF_ATQLEN - mbx_start;
+			ccq->reg.bah = VF_ATQBAH - mbx_start;
+			ccq->reg.bal = VF_ATQBAL - mbx_start;
 			ccq->reg.len_mask = VF_ATQLEN_ATQLEN_M;
 			ccq->reg.len_ena_mask = VF_ATQLEN_ATQENABLE_M;
 			ccq->reg.head_mask = VF_ATQH_ATQH_M;
 			break;
 		case IDPF_CTLQ_TYPE_MAILBOX_RX:
 			/* set head and tail registers in our local struct */
-			ccq->reg.head = VF_ARQH;
-			ccq->reg.tail = VF_ARQT;
-			ccq->reg.len = VF_ARQLEN;
-			ccq->reg.bah = VF_ARQBAH;
-			ccq->reg.bal = VF_ARQBAL;
+			ccq->reg.head = VF_ARQH - mbx_start;
+			ccq->reg.tail = VF_ARQT - mbx_start;
+			ccq->reg.len = VF_ARQLEN - mbx_start;
+			ccq->reg.bah = VF_ARQBAH - mbx_start;
+			ccq->reg.bal = VF_ARQBAL - mbx_start;
 			ccq->reg.len_mask = VF_ARQLEN_ARQLEN_M;
 			ccq->reg.len_ena_mask = VF_ARQLEN_ARQENABLE_M;
 			ccq->reg.head_mask = VF_ARQH_ARQH_M;
···
  */
 static void idpf_vf_reset_reg_init(struct idpf_adapter *adapter)
 {
-	adapter->reset_reg.rstat = idpf_get_reg_addr(adapter, VFGEN_RSTAT);
+	adapter->reset_reg.rstat = idpf_get_rstat_reg_addr(adapter, VFGEN_RSTAT);
 	adapter->reset_reg.rstat_m = VFGEN_RSTAT_VFR_STATE_M;
 }
 
···
 	if (trig_cause == IDPF_HR_FUNC_RESET &&
 	    !test_bit(IDPF_REMOVE_IN_PROG, adapter->flags))
 		idpf_send_mb_msg(adapter, VIRTCHNL2_OP_RESET_VF, 0, NULL, 0);
+}
+
+/**
+ * idpf_idc_vf_register - register for IDC callbacks
+ * @adapter: Driver specific private structure
+ *
+ * Return: 0 on success or error code on failure.
+ */
+static int idpf_idc_vf_register(struct idpf_adapter *adapter)
+{
+	return idpf_idc_init_aux_core_dev(adapter, IIDC_FUNCTION_TYPE_VF);
 }
 
 /**
···
 void idpf_vf_dev_ops_init(struct idpf_adapter *adapter)
 {
 	idpf_vf_reg_ops_init(adapter);
+
+	adapter->dev_ops.idc_init = idpf_idc_vf_register;
+
+	resource_set_range(&adapter->dev_ops.static_reg_info[0],
+			   VF_BASE, IDPF_VF_MBX_REGION_SZ);
+	resource_set_range(&adapter->dev_ops.static_reg_info[1],
+			   VFGEN_RSTAT, IDPF_VF_RSTAT_REGION_SZ);
 }

drivers/net/ethernet/intel/idpf/idpf_virtchnl.c

···
 // SPDX-License-Identifier: GPL-2.0-only
 /* Copyright (C) 2023 Intel Corporation */
 
+#include <linux/export.h>
 #include <net/libeth/rx.h>
 
 #include "idpf.h"
···
 
 	caps.other_caps =
 		cpu_to_le64(VIRTCHNL2_CAP_SRIOV			|
+			    VIRTCHNL2_CAP_RDMA                  |
+			    VIRTCHNL2_CAP_LAN_MEMORY_REGIONS	|
 			    VIRTCHNL2_CAP_MACFILTER		|
 			    VIRTCHNL2_CAP_SPLITQ_QSCHED		|
 			    VIRTCHNL2_CAP_PROMISC		|
···
 		return reply_sz;
 	if (reply_sz < sizeof(adapter->caps))
 		return -EIO;
+
+	return 0;
+}
+
+/**
+ * idpf_send_get_lan_memory_regions - Send virtchnl get LAN memory regions msg
+ * @adapter: Driver specific private struct
+ *
+ * Return: 0 on success or error code on failure.
+ */
+static int idpf_send_get_lan_memory_regions(struct idpf_adapter *adapter)
+{
+	struct virtchnl2_get_lan_memory_regions *rcvd_regions __free(kfree);
+	struct idpf_vc_xn_params xn_params = {
+		.vc_op = VIRTCHNL2_OP_GET_LAN_MEMORY_REGIONS,
+		.recv_buf.iov_len = IDPF_CTLQ_MAX_BUF_LEN,
+		.timeout_ms = IDPF_VC_XN_DEFAULT_TIMEOUT_MSEC,
+	};
+	int num_regions, size;
+	struct idpf_hw *hw;
+	ssize_t reply_sz;
+	int err = 0;
+
+	rcvd_regions = kzalloc(IDPF_CTLQ_MAX_BUF_LEN, GFP_KERNEL);
+	if (!rcvd_regions)
+		return -ENOMEM;
+
+	xn_params.recv_buf.iov_base = rcvd_regions;
+	reply_sz = idpf_vc_xn_exec(adapter, &xn_params);
+	if (reply_sz < 0)
+		return reply_sz;
+
+	num_regions = le16_to_cpu(rcvd_regions->num_memory_regions);
+	size = struct_size(rcvd_regions, mem_reg, num_regions);
+	if (reply_sz < size)
+		return -EIO;
+
+	if (size > IDPF_CTLQ_MAX_BUF_LEN)
+		return -EINVAL;
+
+	hw = &adapter->hw;
+	hw->lan_regs = kcalloc(num_regions, sizeof(*hw->lan_regs), GFP_KERNEL);
+	if (!hw->lan_regs)
+		return -ENOMEM;
+
+	for (int i = 0; i < num_regions; i++) {
+		hw->lan_regs[i].addr_len =
+			le64_to_cpu(rcvd_regions->mem_reg[i].size);
+		hw->lan_regs[i].addr_start =
+			le64_to_cpu(rcvd_regions->mem_reg[i].start_offset);
+	}
+	hw->num_lan_regs = num_regions;
+
+	return err;
+}
+
+/**
+ * idpf_calc_remaining_mmio_regs - calculate MMIO regions outside mbx and rstat
+ * @adapter: Driver specific private structure
+ *
+ * Called when idpf_send_get_lan_memory_regions is not supported. This will
+ * calculate the offsets and sizes for the regions before, in between, and
+ * after the mailbox and rstat MMIO mappings.
+ *
+ * Return: 0 on success or error code on failure.
+ */
+static int idpf_calc_remaining_mmio_regs(struct idpf_adapter *adapter)
+{
+	struct resource *rstat_reg = &adapter->dev_ops.static_reg_info[1];
+	struct resource *mbx_reg = &adapter->dev_ops.static_reg_info[0];
+	struct idpf_hw *hw = &adapter->hw;
+
+	hw->num_lan_regs = IDPF_MMIO_MAP_FALLBACK_MAX_REMAINING;
+	hw->lan_regs = kcalloc(hw->num_lan_regs, sizeof(*hw->lan_regs),
+			       GFP_KERNEL);
+	if (!hw->lan_regs)
+		return -ENOMEM;
+
+	/* Region preceding mailbox */
+	hw->lan_regs[0].addr_start = 0;
+	hw->lan_regs[0].addr_len = mbx_reg->start;
+	/* Region between mailbox and rstat */
+	hw->lan_regs[1].addr_start = mbx_reg->end + 1;
+	hw->lan_regs[1].addr_len = rstat_reg->start -
+					hw->lan_regs[1].addr_start;
+	/* Region after rstat */
+	hw->lan_regs[2].addr_start = rstat_reg->end + 1;
+	hw->lan_regs[2].addr_len = pci_resource_len(adapter->pdev, 0) -
+					hw->lan_regs[2].addr_start;
+
+	return 0;
+}
+
+/**
+ * idpf_map_lan_mmio_regs - map remaining LAN BAR regions
+ * @adapter: Driver specific private structure
+ *
+ * Return: 0 on success or error code on failure.
+ */
+static int idpf_map_lan_mmio_regs(struct idpf_adapter *adapter)
+{
+	struct pci_dev *pdev = adapter->pdev;
+	struct idpf_hw *hw = &adapter->hw;
+	resource_size_t res_start;
+
+	res_start = pci_resource_start(pdev, 0);
+
+	for (int i = 0; i < hw->num_lan_regs; i++) {
+		resource_size_t start;
+		long len;
+
+		len = hw->lan_regs[i].addr_len;
+		if (!len)
+			continue;
+		start = hw->lan_regs[i].addr_start + res_start;
+
+		hw->lan_regs[i].vaddr = devm_ioremap(&pdev->dev, start, len);
+		if (!hw->lan_regs[i].vaddr) {
+			pci_err(pdev, "failed to allocate BAR0 region\n");
+			return -ENOMEM;
+		}
+	}
 
 	return 0;
 }
···
 	struct idpf_hw *hw = &adapter->hw;
 	int err;
 
-	adapter->dev_ops.reg_ops.ctlq_reg_init(ctlq_info);
+	adapter->dev_ops.reg_ops.ctlq_reg_init(adapter, ctlq_info);
 
 	err = idpf_ctlq_init(hw, IDPF_NUM_DFLT_MBX_Q, ctlq_info);
 	if (err)
···
 		msleep(task_delay);
 	}
 
+	if (idpf_is_cap_ena(adapter, IDPF_OTHER_CAPS, VIRTCHNL2_CAP_LAN_MEMORY_REGIONS)) {
+		err = idpf_send_get_lan_memory_regions(adapter);
+		if (err) {
+			dev_err(&adapter->pdev->dev, "Failed to get LAN memory regions: %d\n",
+				err);
+			return -EINVAL;
+		}
+	} else {
+		/* Fallback to mapping the remaining regions of the entire BAR */
+		err = idpf_calc_remaining_mmio_regs(adapter);
+		if (err) {
+			dev_err(&adapter->pdev->dev, "Failed to allocate BAR0 region(s): %d\n",
+				err);
+			return -ENOMEM;
+		}
+	}
+
+	err = idpf_map_lan_mmio_regs(adapter);
+	if (err) {
+		dev_err(&adapter->pdev->dev, "Failed to map BAR0 region(s): %d\n",
+			err);
+		return -ENOMEM;
+	}
+
 	pci_sriov_set_totalvfs(adapter->pdev, idpf_get_max_vfs(adapter));
 	num_max_vports = idpf_get_max_vports(adapter);
 	adapter->max_vports = num_max_vports;
···
 
 	idpf_ptp_release(adapter);
 	idpf_deinit_task(adapter);
+	idpf_idc_deinit_core_aux_device(adapter->cdev_info);
 	idpf_intr_rel(adapter);
 
 	if (remove_in_prog)
···
 
 	return reply_sz < 0 ? reply_sz : 0;
 }
+
+/**
+ * idpf_idc_rdma_vc_send_sync - virtchnl send callback for IDC registered drivers
+ * @cdev_info: IDC core device info pointer
+ * @send_msg: message to send
+ * @msg_size: size of message to send
+ * @recv_msg: message to populate on reception of response
+ * @recv_len: length of message copied into recv_msg or 0 on error
+ *
+ * Return: 0 on success or error code on failure.
+ */
+int idpf_idc_rdma_vc_send_sync(struct iidc_rdma_core_dev_info *cdev_info,
+			       u8 *send_msg, u16 msg_size,
+			       u8 *recv_msg, u16 *recv_len)
+{
+	struct idpf_adapter *adapter = pci_get_drvdata(cdev_info->pdev);
+	struct idpf_vc_xn_params xn_params = { };
+	ssize_t reply_sz;
+	u16 recv_size;
+
+	if (!recv_msg || !recv_len || msg_size > IDPF_CTLQ_MAX_BUF_LEN)
+		return -EINVAL;
+
+	recv_size = min_t(u16, *recv_len, IDPF_CTLQ_MAX_BUF_LEN);
+	*recv_len = 0;
+	xn_params.vc_op = VIRTCHNL2_OP_RDMA;
+	xn_params.timeout_ms = IDPF_VC_XN_DEFAULT_TIMEOUT_MSEC;
+	xn_params.send_buf.iov_base = send_msg;
+	xn_params.send_buf.iov_len = msg_size;
+	xn_params.recv_buf.iov_base = recv_msg;
+	xn_params.recv_buf.iov_len = recv_size;
+	reply_sz = idpf_vc_xn_exec(adapter, &xn_params);
+	if (reply_sz < 0)
+		return reply_sz;
+	*recv_len = reply_sz;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(idpf_idc_rdma_vc_send_sync);

drivers/net/ethernet/intel/idpf/idpf_virtchnl.h

···
 int idpf_send_get_set_rss_key_msg(struct idpf_vport *vport, bool get);
 int idpf_send_get_set_rss_lut_msg(struct idpf_vport *vport, bool get);
 void idpf_vc_xn_shutdown(struct idpf_vc_xn_manager *vcxn_mngr);
+int idpf_idc_rdma_vc_send_sync(struct iidc_rdma_core_dev_info *cdev_info,
+			       u8 *send_msg, u16 msg_size,
+			       u8 *recv_msg, u16 *recv_len);
 
 #endif /* _IDPF_VIRTCHNL_H_ */

drivers/net/ethernet/intel/idpf/virtchnl2.h

···
 	VIRTCHNL2_OP_GET_PTYPE_INFO		= 526,
 	/* Opcode 527 and 528 are reserved for VIRTCHNL2_OP_GET_PTYPE_ID and
 	 * VIRTCHNL2_OP_GET_PTYPE_INFO_RAW.
-	 * Opcodes 529, 530, 531, 532 and 533 are reserved.
 	 */
+	VIRTCHNL2_OP_RDMA			= 529,
+	/* Opcodes 530 through 533 are reserved. */
 	VIRTCHNL2_OP_LOOPBACK			= 534,
 	VIRTCHNL2_OP_ADD_MAC_ADDR		= 535,
 	VIRTCHNL2_OP_DEL_MAC_ADDR		= 536,
···
 	VIRTCHNL2_OP_PTP_ADJ_DEV_CLK_FINE		= 546,
 	VIRTCHNL2_OP_PTP_ADJ_DEV_CLK_TIME		= 547,
 	VIRTCHNL2_OP_PTP_GET_VPORT_TX_TSTAMP_CAPS	= 548,
+	VIRTCHNL2_OP_GET_LAN_MEMORY_REGIONS		= 549,
 };
 
 /**
···
 	VIRTCHNL2_CAP_RX_FLEX_DESC		= BIT_ULL(17),
 	VIRTCHNL2_CAP_PTYPE			= BIT_ULL(18),
 	VIRTCHNL2_CAP_LOOPBACK			= BIT_ULL(19),
-	/* Other capability 20 is reserved */
+	/* Other capability 20-21 is reserved */
+	VIRTCHNL2_CAP_LAN_MEMORY_REGIONS	= BIT_ULL(22),
 
 	/* this must be the last capability */
 	VIRTCHNL2_CAP_OEM			= BIT_ULL(63),
···
  *			segment offload.
  * @max_hdr_buf_per_lso: Max number of header buffers that can be used for
  *			 an LSO.
+ * @num_rdma_allocated_vectors: Maximum number of allocated RDMA vectors for
+ *				the device.
  * @pad1: Padding for future extensions.
  *
  * Dataplane driver sends this message to CP to negotiate capabilities and
···
 	__le32 device_type;
 	u8 min_sso_packet_len;
 	u8 max_hdr_buf_per_lso;
-	u8 pad1[10];
+	__le16 num_rdma_allocated_vectors;
+	u8 pad1[8];
 };
 VIRTCHNL2_CHECK_STRUCT_LEN(80, virtchnl2_get_capabilities);
 
···
 /**
  * enum virtchnl2_vport_flags - Vport flags that indicate vport capabilities.
  * @VIRTCHNL2_VPORT_UPLINK_PORT: Representatives of underlying physical ports
+ * @VIRTCHNL2_VPORT_ENABLE_RDMA: RDMA is enabled for this vport
  */
 enum virtchnl2_vport_flags {
 	VIRTCHNL2_VPORT_UPLINK_PORT	= BIT(0),
+	/* VIRTCHNL2_VPORT_* bits [1:3] rsvd */
+	VIRTCHNL2_VPORT_ENABLE_RDMA             = BIT(4),
 };
 
 /**
···
 	__le64 delta;
 };
 VIRTCHNL2_CHECK_STRUCT_LEN(8, virtchnl2_ptp_adj_dev_clk_time);
+
+/**
+ * struct virtchnl2_mem_region - MMIO memory region
+ * @start_offset: starting offset of the MMIO memory region
+ * @size: size of the MMIO memory region
+ */
+struct virtchnl2_mem_region {
+	__le64 start_offset;
+	__le64 size;
+};
+VIRTCHNL2_CHECK_STRUCT_LEN(16, virtchnl2_mem_region);
+
+/**
+ * struct virtchnl2_get_lan_memory_regions - List of LAN MMIO memory regions
+ * @num_memory_regions: number of memory regions
+ * @pad: Padding
+ * @mem_reg: List with memory region info
+ *
+ * PF/VF sends this message to learn what LAN MMIO memory regions it should map.
+ */
+struct virtchnl2_get_lan_memory_regions {
+	__le16 num_memory_regions;
+	u8 pad[6];
+	struct virtchnl2_mem_region mem_reg[];
+};
+VIRTCHNL2_CHECK_STRUCT_LEN(8, virtchnl2_get_lan_memory_regions);
 
 #endif /* _VIRTCHNL_2_H_ */

include/linux/net/intel/iidc_rdma_idpf.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2025 Intel Corporation. */
+
+#ifndef _IIDC_RDMA_IDPF_H_
+#define _IIDC_RDMA_IDPF_H_
+
+#include <linux/auxiliary_bus.h>
+
+/* struct to be populated by core LAN PCI driver */
+struct iidc_rdma_vport_dev_info {
+	struct auxiliary_device *adev;
+	struct auxiliary_device *core_adev;
+	struct net_device *netdev;
+	u16 vport_id;
+};
+
+struct iidc_rdma_vport_auxiliary_dev {
+	struct auxiliary_device adev;
+	struct iidc_rdma_vport_dev_info *vdev_info;
+};
+
+struct iidc_rdma_vport_auxiliary_drv {
+	struct auxiliary_driver adrv;
+	void (*event_handler)(struct iidc_rdma_vport_dev_info *vdev,
+			      struct iidc_rdma_event *event);
+};
+
+/* struct to be populated by core LAN PCI driver */
+enum iidc_function_type {
+	IIDC_FUNCTION_TYPE_PF,
+	IIDC_FUNCTION_TYPE_VF,
+};
+
+struct iidc_rdma_lan_mapped_mem_region {
+	u8 __iomem *region_addr;
+	__le64 size;
+	__le64 start_offset;
+};
+
+struct iidc_rdma_priv_dev_info {
+	struct msix_entry *msix_entries;
+	u16 msix_count; /* How many vectors are reserved for this device */
+	enum iidc_function_type ftype;
+	__le16 num_memory_regions;
+	struct iidc_rdma_lan_mapped_mem_region *mapped_mem_regions;
+};
+
+int idpf_idc_vport_dev_ctrl(struct iidc_rdma_core_dev_info *cdev_info, bool up);
+int idpf_idc_request_reset(struct iidc_rdma_core_dev_info *cdev_info,
+			   enum iidc_rdma_reset_type __always_unused reset_type);
+int idpf_idc_rdma_vc_send_sync(struct iidc_rdma_core_dev_info *cdev_info,
+			       u8 *send_msg, u16 msg_size,
+			       u8 *recv_msg, u16 *recv_len);
+
+#endif /* _IIDC_RDMA_IDPF_H_ */