diff --git a/drivers/net/ethernet/intel/idpf/idpf.h b/drivers/net/ethernet/intel/idpf/idpf.h
index 0b3b5259bd43..1bcfa0f0940f 100644
--- a/drivers/net/ethernet/intel/idpf/idpf.h
+++ b/drivers/net/ethernet/intel/idpf/idpf.h
@@ -11,6 +11,8 @@ struct idpf_adapter;
 #include <linux/etherdevice.h>
 #include <linux/pci.h>
 
+#include "virtchnl2.h"
+#include "idpf_txrx.h"
 #include "idpf_controlq.h"
 
 /* Default Mailbox settings */
@@ -18,12 +20,24 @@ struct idpf_adapter;
 #define IDPF_NUM_DFLT_MBX_Q		2	/* includes both TX and RX */
 #define IDPF_DFLT_MBX_Q_LEN		64
 #define IDPF_DFLT_MBX_ID		-1
+/* maximum number of times to try before resetting mailbox */
+#define IDPF_MB_MAX_ERR			20
+#define IDPF_WAIT_FOR_EVENT_TIMEO_MIN	2000
+#define IDPF_WAIT_FOR_EVENT_TIMEO	60000
+
+#define IDPF_MAX_WAIT			500
 
 /* available message levels */
 #define IDPF_AVAIL_NETIF_M (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK)
 
+#define IDPF_VIRTCHNL_VERSION_MAJOR VIRTCHNL2_VERSION_MAJOR_2
+#define IDPF_VIRTCHNL_VERSION_MINOR VIRTCHNL2_VERSION_MINOR_0
+
 enum idpf_state {
 	__IDPF_STARTUP,
+	__IDPF_VER_CHECK,
+	__IDPF_GET_CAPS,
+	__IDPF_INIT_SW,
 	__IDPF_STATE_LAST /* this member MUST be last */
 };
 
@@ -37,6 +51,16 @@ enum idpf_flags {
 	__IDPF_HR_DRV_LOAD,
 	/* Reset in progress */
 	__IDPF_HR_RESET_IN_PROG,
+	/* Resources release in progress*/
+	__IDPF_REL_RES_IN_PROG,
+	/* Generic bits to share a message */
+	/* Mailbox interrupt event */
+	__IDPF_MB_INTR_MODE,
+	__IDPF_MB_INTR_TRIGGER,
+	/* Virtchnl message buffer received needs to be processed */
+	__IDPF_VC_MSG_PENDING,
+	/* Do not schedule service task if bit is set */
+	__IDPF_CANCEL_SERVICE_TASK,
 	/* Driver remove in progress */
 	__IDPF_REMOVE_IN_PROG,
 	/* must be last */
@@ -53,6 +77,7 @@ struct idpf_reset_reg {
 /* product specific register API */
 struct idpf_reg_ops {
 	void (*ctlq_reg_init)(struct idpf_ctlq_create_info *cq);
+	void (*mb_intr_reg_init)(struct idpf_adapter *adapter);
 	void (*reset_reg_init)(struct idpf_adapter *adapter);
 	void (*trigger_reset)(struct idpf_adapter *adapter,
 			      enum idpf_flags trig_cause);
@@ -62,22 +87,104 @@ struct idpf_dev_ops {
 	struct idpf_reg_ops reg_ops;
 };
 
+/* These macros allow us to generate an enum and a matching char * array of
+ * stringified enums that are always in sync. Checkpatch issues a bogus warning
+ * about this being a complex macro; but it's wrong, these are never used as a
+ * statement and instead only used to define the enum and array.
+ */
+#define IDPF_FOREACH_VPORT_VC_STATE(STATE)	\
+	STATE(IDPF_VC_ALLOC_VECTORS)		\
+	STATE(IDPF_VC_ALLOC_VECTORS_ERR)	\
+	STATE(IDPF_VC_DEALLOC_VECTORS)		\
+	STATE(IDPF_VC_DEALLOC_VECTORS_ERR)	\
+	STATE(IDPF_VC_NBITS)
+
+#define IDPF_GEN_ENUM(ENUM) ENUM,
+#define IDPF_GEN_STRING(STRING) #STRING,
+
+enum idpf_vport_vc_state {
+	IDPF_FOREACH_VPORT_VC_STATE(IDPF_GEN_ENUM)
+};
+
+extern const char * const idpf_vport_vc_state_str[];
+
+struct idpf_vport {
+	u32 vport_id;
+};
+
+/* Stack to maintain vector indexes used for 'vector distribution' algorithm */
+struct idpf_vector_lifo {
+	/* Vector stack maintains all the relative vector indexes at the
+	 * *adapter* level. This stack is divided into 2 parts, first one is
+	 * called as 'default pool' and other one is called 'free pool'.
+	 * Vector distribution algorithm gives priority to default vports in
+	 * a way that at least IDPF_MIN_Q_VEC vectors are allocated per
+	 * default vport and the relative vector indexes for those are
+	 * maintained in default pool. Free pool contains all the unallocated
+	 * vector indexes which can be allocated on-demand basis.
+	 * Mailbox vector index is maintained in the default pool of the stack.
+	 */
+	u16 top;	/* Points to stack top i.e. next available vector index */
+	u16 base;	/* Always points to start of the 'free pool' */
+	u16 size;	/* Total size of the vector stack */
+	u16 *vec_idx;	/* Array to store all the vector indexes */
+};
+
 struct idpf_adapter {
 	struct pci_dev *pdev;
+	u32 virt_ver_maj;
+	u32 virt_ver_min;
+
 	u32 msg_enable;
+	u32 mb_wait_count;
 	enum idpf_state state;
 	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;
+	struct virtchnl2_alloc_vectors *req_vec_chunks;
+	struct idpf_q_vector mb_vector;
+	/* Stack to store the msix vector indexes */
+	struct idpf_vector_lifo vector_stack;
+	/* handler for hard interrupt for mailbox*/
+	irqreturn_t (*irq_mb_handler)(int irq, void *data);
+
+	struct delayed_work serv_task; /* delayed service task */
+	struct workqueue_struct *serv_wq;
 	struct delayed_work vc_event_task; /* delayed virtchannel event task */
 	struct workqueue_struct *vc_event_wq;
+	struct virtchnl2_get_capabilities caps;
 
+	wait_queue_head_t vchnl_wq;
+	DECLARE_BITMAP(vc_state, IDPF_VC_NBITS);
+	char vc_msg[IDPF_DFLT_MBX_BUF_SIZE];
 	struct idpf_dev_ops dev_ops;
 
 	struct mutex reset_lock;	/* lock to protect reset flows */
+	struct mutex vector_lock;	/* lock to protect vector distribution */
 };
 
+/**
+ * idpf_get_reserved_vecs - Get reserved vectors
+ * @adapter: private data struct
+ */
+static inline u16 idpf_get_reserved_vecs(struct idpf_adapter *adapter)
+{
+	return le16_to_cpu(adapter->caps.num_allocated_vectors);
+}
+
+/**
+ * idpf_get_default_vports - Get default number of vports
+ * @adapter: private data struct
+ */
+static inline u16 idpf_get_default_vports(struct idpf_adapter *adapter)
+{
+	return le16_to_cpu(adapter->caps.default_num_vports);
+}
+
 /**
  * idpf_get_reg_addr - Get BAR0 register address
  * @adapter: private data struct
@@ -106,10 +213,38 @@ static inline bool idpf_is_reset_detected(struct idpf_adapter *adapter)
 		 adapter->hw.arq->reg.len_ena_mask);
 }
 
+/**
+ * idpf_is_reset_in_prog - check if reset is in progress
+ * @adapter: driver specific private structure
+ *
+ * Returns true if hard reset is in progress, false otherwise
+ */
+static inline bool idpf_is_reset_in_prog(struct idpf_adapter *adapter)
+{
+	return (test_bit(__IDPF_HR_RESET_IN_PROG, adapter->flags) ||
+		test_bit(__IDPF_HR_FUNC_RESET, adapter->flags) ||
+		test_bit(__IDPF_HR_CORE_RESET, adapter->flags) ||
+		test_bit(__IDPF_HR_DRV_LOAD, adapter->flags));
+}
+
+void idpf_service_task(struct work_struct *work);
 void idpf_vc_event_task(struct work_struct *work);
 void idpf_dev_ops_init(struct idpf_adapter *adapter);
 void idpf_vf_dev_ops_init(struct idpf_adapter *adapter);
 int idpf_init_dflt_mbx(struct idpf_adapter *adapter);
 void idpf_deinit_dflt_mbx(struct idpf_adapter *adapter);
+int idpf_vc_core_init(struct idpf_adapter *adapter);
+void idpf_vc_core_deinit(struct idpf_adapter *adapter);
+int idpf_intr_req(struct idpf_adapter *adapter);
+void idpf_intr_rel(struct idpf_adapter *adapter);
+int idpf_send_dealloc_vectors_msg(struct idpf_adapter *adapter);
+int idpf_send_alloc_vectors_msg(struct idpf_adapter *adapter, u16 num_vectors);
+int idpf_get_vec_ids(struct idpf_adapter *adapter,
+		     u16 *vecids, int num_vecids,
+		     struct virtchnl2_vector_chunks *chunks);
+int idpf_recv_mb_msg(struct idpf_adapter *adapter, u32 op,
+		     void *msg, int msg_size);
+int idpf_send_mb_msg(struct idpf_adapter *adapter, u32 op,
+		     u16 msg_size, u8 *msg);
 
 #endif /* !_IDPF_H_ */
diff --git a/drivers/net/ethernet/intel/idpf/idpf_dev.c b/drivers/net/ethernet/intel/idpf/idpf_dev.c
index 7c0c8a14aba9..11cc33eb0b44 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_dev.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_dev.c
@@ -44,6 +44,22 @@ static void idpf_ctlq_reg_init(struct idpf_ctlq_create_info *cq)
 	}
 }
 
+/**
+ * idpf_mb_intr_reg_init - Initialize mailbox interrupt register
+ * @adapter: adapter structure
+ */
+static void idpf_mb_intr_reg_init(struct idpf_adapter *adapter)
+{
+	struct idpf_intr_reg *intr = &adapter->mb_vector.intr_reg;
+	u32 dyn_ctl = le32_to_cpu(adapter->caps.mailbox_dyn_ctl);
+
+	intr->dyn_ctl = idpf_get_reg_addr(adapter, dyn_ctl);
+	intr->dyn_ctl_intena_m = PF_GLINT_DYN_CTL_INTENA_M;
+	intr->dyn_ctl_itridx_m = PF_GLINT_DYN_CTL_ITR_INDX_M;
+	intr->icr_ena = idpf_get_reg_addr(adapter, PF_INT_DIR_OICR_ENA);
+	intr->icr_ena_ctlq_m = PF_INT_DIR_OICR_ENA_M;
+}
+
 /**
  * idpf_reset_reg_init - Initialize reset registers
  * @adapter: Driver specific private structure
@@ -75,6 +91,7 @@ static void idpf_trigger_reset(struct idpf_adapter *adapter,
 static void idpf_reg_ops_init(struct idpf_adapter *adapter)
 {
 	adapter->dev_ops.reg_ops.ctlq_reg_init = idpf_ctlq_reg_init;
+	adapter->dev_ops.reg_ops.mb_intr_reg_init = idpf_mb_intr_reg_init;
 	adapter->dev_ops.reg_ops.reset_reg_init = idpf_reset_reg_init;
 	adapter->dev_ops.reg_ops.trigger_reset = idpf_trigger_reset;
 }
diff --git a/drivers/net/ethernet/intel/idpf/idpf_lan_pf_regs.h b/drivers/net/ethernet/intel/idpf/idpf_lan_pf_regs.h
index 9cc9610990b4..a832319f535c 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_lan_pf_regs.h
+++ b/drivers/net/ethernet/intel/idpf/idpf_lan_pf_regs.h
@@ -53,6 +53,49 @@
 #define PF_FW_ATQH_ATQH_M		GENMASK(9, 0)
 #define PF_FW_ATQT			(PF_FW_BASE + 0x24)
 
+/* Interrupts */
+#define PF_GLINT_BASE			0x08900000
+#define PF_GLINT_DYN_CTL(_INT)		(PF_GLINT_BASE + ((_INT) * 0x1000))
+#define PF_GLINT_DYN_CTL_INTENA_S	0
+#define PF_GLINT_DYN_CTL_INTENA_M	BIT(PF_GLINT_DYN_CTL_INTENA_S)
+#define PF_GLINT_DYN_CTL_CLEARPBA_S	1
+#define PF_GLINT_DYN_CTL_CLEARPBA_M	BIT(PF_GLINT_DYN_CTL_CLEARPBA_S)
+#define PF_GLINT_DYN_CTL_SWINT_TRIG_S	2
+#define PF_GLINT_DYN_CTL_SWINT_TRIG_M	BIT(PF_GLINT_DYN_CTL_SWINT_TRIG_S)
+#define PF_GLINT_DYN_CTL_ITR_INDX_S	3
+#define PF_GLINT_DYN_CTL_ITR_INDX_M	GENMASK(4, 3)
+#define PF_GLINT_DYN_CTL_INTERVAL_S	5
+#define PF_GLINT_DYN_CTL_INTERVAL_M	BIT(PF_GLINT_DYN_CTL_INTERVAL_S)
+#define PF_GLINT_DYN_CTL_SW_ITR_INDX_ENA_S	24
+#define PF_GLINT_DYN_CTL_SW_ITR_INDX_ENA_M BIT(PF_GLINT_DYN_CTL_SW_ITR_INDX_ENA_S)
+#define PF_GLINT_DYN_CTL_SW_ITR_INDX_S	25
+#define PF_GLINT_DYN_CTL_SW_ITR_INDX_M	BIT(PF_GLINT_DYN_CTL_SW_ITR_INDX_S)
+#define PF_GLINT_DYN_CTL_WB_ON_ITR_S	30
+#define PF_GLINT_DYN_CTL_WB_ON_ITR_M	BIT(PF_GLINT_DYN_CTL_WB_ON_ITR_S)
+#define PF_GLINT_DYN_CTL_INTENA_MSK_S	31
+#define PF_GLINT_DYN_CTL_INTENA_MSK_M	BIT(PF_GLINT_DYN_CTL_INTENA_MSK_S)
+
+/* Generic registers */
+#define PF_INT_DIR_OICR_ENA		0x08406000
+#define PF_INT_DIR_OICR_ENA_S		0
+#define PF_INT_DIR_OICR_ENA_M		GENMASK(31, 0)
+#define PF_INT_DIR_OICR			0x08406004
+#define PF_INT_DIR_OICR_TSYN_EVNT	0
+#define PF_INT_DIR_OICR_PHY_TS_0	BIT(1)
+#define PF_INT_DIR_OICR_PHY_TS_1	BIT(2)
+#define PF_INT_DIR_OICR_CAUSE		0x08406008
+#define PF_INT_DIR_OICR_CAUSE_CAUSE_S	0
+#define PF_INT_DIR_OICR_CAUSE_CAUSE_M	GENMASK(31, 0)
+#define PF_INT_PBA_CLEAR		0x0840600C
+
+#define PF_FUNC_RID			0x08406010
+#define PF_FUNC_RID_FUNCTION_NUMBER_S	0
+#define PF_FUNC_RID_FUNCTION_NUMBER_M	GENMASK(2, 0)
+#define PF_FUNC_RID_DEVICE_NUMBER_S	3
+#define PF_FUNC_RID_DEVICE_NUMBER_M	GENMASK(7, 3)
+#define PF_FUNC_RID_BUS_NUMBER_S	8
+#define PF_FUNC_RID_BUS_NUMBER_M	GENMASK(15, 8)
+
 /* Reset registers */
 #define PFGEN_RTRIG			0x08407000
 #define PFGEN_RTRIG_CORER_S		0
diff --git a/drivers/net/ethernet/intel/idpf/idpf_lan_vf_regs.h b/drivers/net/ethernet/intel/idpf/idpf_lan_vf_regs.h
index 8040bedea2fd..d1bff18e2a7d 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_lan_vf_regs.h
+++ b/drivers/net/ethernet/intel/idpf/idpf_lan_vf_regs.h
@@ -62,4 +62,42 @@
 #define VF_QRXB_TAIL_BASE		0x00060000
 #define VF_QRXB_TAIL(_QRX)		(VF_QRXB_TAIL_BASE + ((_QRX) * 4))
 
+/* Interrupts */
+#define VF_INT_DYN_CTL0			0x00005C00
+#define VF_INT_DYN_CTL0_INTENA_S	0
+#define VF_INT_DYN_CTL0_INTENA_M	BIT(VF_INT_DYN_CTL0_INTENA_S)
+#define VF_INT_DYN_CTL0_ITR_INDX_S	3
+#define VF_INT_DYN_CTL0_ITR_INDX_M	GENMASK(4, 3)
+#define VF_INT_DYN_CTLN(_INT)		(0x00003800 + ((_INT) * 4))
+#define VF_INT_DYN_CTLN_EXT(_INT)	(0x00070000 + ((_INT) * 4))
+#define VF_INT_DYN_CTLN_INTENA_S	0
+#define VF_INT_DYN_CTLN_INTENA_M	BIT(VF_INT_DYN_CTLN_INTENA_S)
+#define VF_INT_DYN_CTLN_CLEARPBA_S	1
+#define VF_INT_DYN_CTLN_CLEARPBA_M	BIT(VF_INT_DYN_CTLN_CLEARPBA_S)
+#define VF_INT_DYN_CTLN_SWINT_TRIG_S	2
+#define VF_INT_DYN_CTLN_SWINT_TRIG_M	BIT(VF_INT_DYN_CTLN_SWINT_TRIG_S)
+#define VF_INT_DYN_CTLN_ITR_INDX_S	3
+#define VF_INT_DYN_CTLN_ITR_INDX_M	GENMASK(4, 3)
+#define VF_INT_DYN_CTLN_INTERVAL_S	5
+#define VF_INT_DYN_CTLN_INTERVAL_M	BIT(VF_INT_DYN_CTLN_INTERVAL_S)
+#define VF_INT_DYN_CTLN_SW_ITR_INDX_ENA_S 24
+#define VF_INT_DYN_CTLN_SW_ITR_INDX_ENA_M BIT(VF_INT_DYN_CTLN_SW_ITR_INDX_ENA_S)
+#define VF_INT_DYN_CTLN_SW_ITR_INDX_S	25
+#define VF_INT_DYN_CTLN_SW_ITR_INDX_M	BIT(VF_INT_DYN_CTLN_SW_ITR_INDX_S)
+#define VF_INT_DYN_CTLN_WB_ON_ITR_S	30
+#define VF_INT_DYN_CTLN_WB_ON_ITR_M	BIT(VF_INT_DYN_CTLN_WB_ON_ITR_S)
+#define VF_INT_DYN_CTLN_INTENA_MSK_S	31
+#define VF_INT_DYN_CTLN_INTENA_MSK_M	BIT(VF_INT_DYN_CTLN_INTENA_MSK_S)
+
+#define VF_INT_ICR0_ENA1		0x00005000
+#define VF_INT_ICR0_ENA1_ADMINQ_S	30
+#define VF_INT_ICR0_ENA1_ADMINQ_M	BIT(VF_INT_ICR0_ENA1_ADMINQ_S)
+#define VF_INT_ICR0_ENA1_RSVD_S		31
+#define VF_INT_ICR01			0x00004800
+#define VF_QF_HENA(_i)			(0x0000C400 + ((_i) * 4))
+#define VF_QF_HENA_MAX_INDX		1
+#define VF_QF_HKEY(_i)			(0x0000CC00 + ((_i) * 4))
+#define VF_QF_HKEY_MAX_INDX		12
+#define VF_QF_HLUT(_i)			(0x0000D000 + ((_i) * 4))
+#define VF_QF_HLUT_MAX_INDX		15
 #endif
diff --git a/drivers/net/ethernet/intel/idpf/idpf_lib.c b/drivers/net/ethernet/intel/idpf/idpf_lib.c
index d4f346312915..1399fcd8ae98 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_lib.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_lib.c
@@ -3,6 +3,333 @@
 
 #include "idpf.h"
 
+const char * const idpf_vport_vc_state_str[] = {
+	IDPF_FOREACH_VPORT_VC_STATE(IDPF_GEN_STRING)
+};
+
+/**
+ * idpf_init_vector_stack - Fill the MSIX vector stack with vector index
+ * @adapter: private data struct
+ *
+ * Return 0 on success, error on failure
+ */
+static int idpf_init_vector_stack(struct idpf_adapter *adapter)
+{
+	struct idpf_vector_lifo *stack;
+	u16 min_vec;
+	u32 i;
+
+	mutex_lock(&adapter->vector_lock);
+	min_vec = adapter->num_msix_entries - adapter->num_avail_msix;
+	stack = &adapter->vector_stack;
+	stack->size = adapter->num_msix_entries;
+	/* set the base and top to point at start of the 'free pool' to
+	 * distribute the unused vectors on-demand basis
+	 */
+	stack->base = min_vec;
+	stack->top = min_vec;
+
+	stack->vec_idx = kcalloc(stack->size, sizeof(u16), GFP_KERNEL);
+	if (!stack->vec_idx) {
+		mutex_unlock(&adapter->vector_lock);
+
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < stack->size; i++)
+		stack->vec_idx[i] = i;
+
+	mutex_unlock(&adapter->vector_lock);
+
+	return 0;
+}
+
+/**
+ * idpf_deinit_vector_stack - zero out the MSIX vector stack
+ * @adapter: private data struct
+ */
+static void idpf_deinit_vector_stack(struct idpf_adapter *adapter)
+{
+	struct idpf_vector_lifo *stack;
+
+	mutex_lock(&adapter->vector_lock);
+	stack = &adapter->vector_stack;
+	kfree(stack->vec_idx);
+	stack->vec_idx = NULL;
+	mutex_unlock(&adapter->vector_lock);
+}
+
+/**
+ * idpf_mb_intr_rel_irq - Free the IRQ association with the OS
+ * @adapter: adapter structure
+ */
+static void idpf_mb_intr_rel_irq(struct idpf_adapter *adapter)
+{
+	free_irq(adapter->msix_entries[0].vector, adapter);
+}
+
+/**
+ * idpf_intr_rel - Release interrupt capabilities and free memory
+ * @adapter: adapter to disable interrupts on
+ */
+void idpf_intr_rel(struct idpf_adapter *adapter)
+{
+	int err;
+
+	if (!adapter->msix_entries)
+		return;
+
+	clear_bit(__IDPF_MB_INTR_MODE, adapter->flags);
+	clear_bit(__IDPF_MB_INTR_TRIGGER, adapter->flags);
+
+	idpf_mb_intr_rel_irq(adapter);
+	pci_free_irq_vectors(adapter->pdev);
+
+	err = idpf_send_dealloc_vectors_msg(adapter);
+	if (err)
+		dev_err(&adapter->pdev->dev,
+			"Failed to deallocate vectors: %d\n", err);
+
+	idpf_deinit_vector_stack(adapter);
+	kfree(adapter->msix_entries);
+	adapter->msix_entries = NULL;
+}
+
+/**
+ * idpf_mb_intr_clean - Interrupt handler for the mailbox
+ * @irq: interrupt number
+ * @data: pointer to the adapter structure
+ */
+static irqreturn_t idpf_mb_intr_clean(int __always_unused irq, void *data)
+{
+	struct idpf_adapter *adapter = (struct idpf_adapter *)data;
+
+	set_bit(__IDPF_MB_INTR_TRIGGER, adapter->flags);
+	mod_delayed_work(adapter->serv_wq, &adapter->serv_task,
+			 msecs_to_jiffies(0));
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * idpf_mb_irq_enable - Enable MSIX interrupt for the mailbox
+ * @adapter: adapter to get the hardware address for register write
+ */
+static void idpf_mb_irq_enable(struct idpf_adapter *adapter)
+{
+	struct idpf_intr_reg *intr = &adapter->mb_vector.intr_reg;
+	u32 val;
+
+	val = intr->dyn_ctl_intena_m | intr->dyn_ctl_itridx_m;
+	writel(val, intr->dyn_ctl);
+	writel(intr->icr_ena_ctlq_m, intr->icr_ena);
+}
+
+/**
+ * idpf_mb_intr_req_irq - Request irq for the mailbox interrupt
+ * @adapter: adapter structure to pass to the mailbox irq handler
+ */
+static int idpf_mb_intr_req_irq(struct idpf_adapter *adapter)
+{
+	struct idpf_q_vector *mb_vector = &adapter->mb_vector;
+	int irq_num, mb_vidx = 0, err;
+
+	irq_num = adapter->msix_entries[mb_vidx].vector;
+	snprintf(mb_vector->name, sizeof(mb_vector->name) - 1,
+		 "%s-%s-%d", dev_driver_string(&adapter->pdev->dev),
+		 "Mailbox", mb_vidx);
+	err = request_irq(irq_num, adapter->irq_mb_handler, 0,
+			  mb_vector->name, adapter);
+	if (err) {
+		dev_err(&adapter->pdev->dev,
+			"IRQ request for mailbox failed, error: %d\n", err);
+
+		return err;
+	}
+
+	set_bit(__IDPF_MB_INTR_MODE, adapter->flags);
+
+	return 0;
+}
+
+/**
+ * idpf_set_mb_vec_id - Set vector index for mailbox
+ * @adapter: adapter structure to access the vector chunks
+ *
+ * The first vector id in the requested vector chunks from the CP is for
+ * the mailbox
+ */
+static void idpf_set_mb_vec_id(struct idpf_adapter *adapter)
+{
+	if (adapter->req_vec_chunks)
+		adapter->mb_vector.v_idx =
+			le16_to_cpu(adapter->caps.mailbox_vector_id);
+	else
+		adapter->mb_vector.v_idx = 0;
+}
+
+/**
+ * idpf_mb_intr_init - Initialize the mailbox interrupt
+ * @adapter: adapter structure to store the mailbox vector
+ */
+static int idpf_mb_intr_init(struct idpf_adapter *adapter)
+{
+	adapter->dev_ops.reg_ops.mb_intr_reg_init(adapter);
+	adapter->irq_mb_handler = idpf_mb_intr_clean;
+
+	return idpf_mb_intr_req_irq(adapter);
+}
+
+/**
+ * idpf_intr_req - Request interrupt capabilities
+ * @adapter: adapter to enable interrupts on
+ *
+ * Returns 0 on success, negative on failure
+ */
+int idpf_intr_req(struct idpf_adapter *adapter)
+{
+	u16 default_vports = idpf_get_default_vports(adapter);
+	int num_q_vecs, total_vecs, num_vec_ids;
+	int min_vectors, v_actual, err = 0;
+	unsigned int vector;
+	u16 *vecids;
+
+	total_vecs = idpf_get_reserved_vecs(adapter);
+	num_q_vecs = total_vecs - IDPF_MBX_Q_VEC;
+
+	err = idpf_send_alloc_vectors_msg(adapter, num_q_vecs);
+	if (err) {
+		dev_err(&adapter->pdev->dev,
+			"Failed to allocate vectors: %d\n", err);
+
+		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;
+		goto send_dealloc_vecs;
+	}
+
+	adapter->msix_entries = kcalloc(v_actual, sizeof(struct msix_entry),
+					GFP_KERNEL);
+
+	if (!adapter->msix_entries) {
+		err = -ENOMEM;
+		goto free_irq;
+	}
+
+	idpf_set_mb_vec_id(adapter);
+
+	vecids = kcalloc(total_vecs, sizeof(u16), GFP_KERNEL);
+	if (!vecids) {
+		err = -ENOMEM;
+		goto free_msix;
+	}
+
+	if (adapter->req_vec_chunks) {
+		struct virtchnl2_vector_chunks *vchunks;
+		struct virtchnl2_alloc_vectors *ac;
+
+		ac = adapter->req_vec_chunks;
+		vchunks = &ac->vchunks;
+
+		num_vec_ids = idpf_get_vec_ids(adapter, vecids, total_vecs,
+					       vchunks);
+		if (num_vec_ids < v_actual) {
+			err = -EINVAL;
+			goto free_vecids;
+		}
+	} else {
+		int i = 0;
+
+		for (i = 0; i < v_actual; i++)
+			vecids[i] = i;
+	}
+
+	for (vector = 0; vector < v_actual; vector++) {
+		adapter->msix_entries[vector].entry = vecids[vector];
+		adapter->msix_entries[vector].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;
+
+	/* Fill MSIX vector lifo stack with vector indexes */
+	err = idpf_init_vector_stack(adapter);
+	if (err)
+		goto free_vecids;
+
+	err = idpf_mb_intr_init(adapter);
+	if (err)
+		goto deinit_vec_stack;
+	idpf_mb_irq_enable(adapter);
+	kfree(vecids);
+
+	return err;
+
+deinit_vec_stack:
+	idpf_deinit_vector_stack(adapter);
+free_vecids:
+	kfree(vecids);
+free_msix:
+	kfree(adapter->msix_entries);
+	adapter->msix_entries = NULL;
+free_irq:
+	pci_free_irq_vectors(adapter->pdev);
+send_dealloc_vecs:
+	idpf_send_dealloc_vectors_msg(adapter);
+
+	return err;
+}
+
+/**
+ * idpf_service_task - Delayed task for handling mailbox responses
+ * @work: work_struct handle to our data
+ *
+ */
+void idpf_service_task(struct work_struct *work)
+{
+	struct idpf_adapter *adapter;
+
+	adapter = container_of(work, struct idpf_adapter, serv_task.work);
+
+	if (test_bit(__IDPF_MB_INTR_MODE, adapter->flags)) {
+		if (test_and_clear_bit(__IDPF_MB_INTR_TRIGGER,
+				       adapter->flags)) {
+			idpf_recv_mb_msg(adapter, VIRTCHNL2_OP_UNKNOWN,
+					 NULL, 0);
+			idpf_mb_irq_enable(adapter);
+		}
+	} else {
+		idpf_recv_mb_msg(adapter, VIRTCHNL2_OP_UNKNOWN, NULL, 0);
+	}
+
+	if (idpf_is_reset_detected(adapter) &&
+	    !idpf_is_reset_in_prog(adapter) &&
+	    !test_bit(__IDPF_REMOVE_IN_PROG, adapter->flags)) {
+		dev_info(&adapter->pdev->dev, "HW reset detected\n");
+		set_bit(__IDPF_HR_FUNC_RESET, adapter->flags);
+		queue_delayed_work(adapter->vc_event_wq,
+				   &adapter->vc_event_task,
+				   msecs_to_jiffies(10));
+	}
+
+	if (!test_bit(__IDPF_CANCEL_SERVICE_TASK, adapter->flags))
+		queue_delayed_work(adapter->serv_wq, &adapter->serv_task,
+				   msecs_to_jiffies(300));
+}
+
 /**
  * idpf_check_reset_complete - check that reset is complete
  * @hw: pointer to hw struct
@@ -61,9 +388,12 @@ static int idpf_init_hard_reset(struct idpf_adapter *adapter)
 	} else if (test_and_clear_bit(__IDPF_HR_FUNC_RESET, adapter->flags)) {
 		bool is_reset = idpf_is_reset_detected(adapter);
 
+		idpf_vc_core_deinit(adapter);
 		if (!is_reset)
 			reg_ops->trigger_reset(adapter, __IDPF_HR_FUNC_RESET);
 		idpf_deinit_dflt_mbx(adapter);
+	} else if (test_and_clear_bit(__IDPF_HR_CORE_RESET, adapter->flags)) {
+		idpf_vc_core_deinit(adapter);
 	} else {
 		dev_err(dev, "Unhandled hard reset cause\n");
 		err = -EBADRQC;
@@ -83,6 +413,19 @@ static int idpf_init_hard_reset(struct idpf_adapter *adapter)
 	if (err)
 		dev_err(dev, "Failed to initialize default mailbox: %d\n", err);
 
+	/* Initialize the state machine, also allocate memory and request
+	 * resources
+	 */
+	err = idpf_vc_core_init(adapter);
+	if (err)
+		goto init_err;
+
+	mutex_unlock(&adapter->reset_lock);
+
+	return 0;
+
+init_err:
+	idpf_deinit_dflt_mbx(adapter);
 handle_err:
 	mutex_unlock(&adapter->reset_lock);
 
diff --git a/drivers/net/ethernet/intel/idpf/idpf_main.c b/drivers/net/ethernet/intel/idpf/idpf_main.c
index 4bb0727f7abd..895451cdfa79 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_main.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_main.c
@@ -25,12 +25,14 @@ static void idpf_remove(struct pci_dev *pdev)
 	 * end up in bad state.
 	 */
 	cancel_delayed_work_sync(&adapter->vc_event_task);
+	idpf_vc_core_deinit(adapter);
 	/* Be a good citizen and leave the device clean on exit */
 	adapter->dev_ops.reg_ops.trigger_reset(adapter, __IDPF_HR_FUNC_RESET);
 	idpf_deinit_dflt_mbx(adapter);
 
 	destroy_workqueue(adapter->vc_event_wq);
 	mutex_destroy(&adapter->reset_lock);
+	mutex_destroy(&adapter->vector_lock);
 
 	pci_disable_pcie_error_reporting(pdev);
 	pci_set_drvdata(pdev, NULL);
@@ -127,6 +129,15 @@ static int idpf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	pci_set_master(pdev);
 	pci_set_drvdata(pdev, adapter);
 
+	adapter->serv_wq = alloc_workqueue("%s-%s-service", 0, 0,
+					   dev_driver_string(dev),
+					   dev_name(dev));
+	if (!adapter->serv_wq) {
+		dev_err(dev, "Failed to allocate service workqueue\n");
+		err = -ENOMEM;
+		goto err_mbx_wq_alloc;
+	}
+
 	adapter->vc_event_wq = alloc_workqueue("%s-%s-vc_event", 0, 0,
 					       dev_driver_string(dev),
 					       dev_name(dev));
@@ -147,7 +158,10 @@ static int idpf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	}
 
 	mutex_init(&adapter->reset_lock);
+	mutex_init(&adapter->vector_lock);
+	init_waitqueue_head(&adapter->vchnl_wq);
 
+	INIT_DELAYED_WORK(&adapter->serv_task, idpf_service_task);
 	INIT_DELAYED_WORK(&adapter->vc_event_task, idpf_vc_event_task);
 
 	adapter->dev_ops.reg_ops.reset_reg_init(adapter);
@@ -160,6 +174,8 @@ static int idpf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 err_cfg_hw:
 	destroy_workqueue(adapter->vc_event_wq);
 err_vc_event_wq_alloc:
+	destroy_workqueue(adapter->serv_wq);
+err_mbx_wq_alloc:
 	pci_disable_pcie_error_reporting(pdev);
 err_free:
 	kfree(adapter);
diff --git a/drivers/net/ethernet/intel/idpf/idpf_txrx.h b/drivers/net/ethernet/intel/idpf/idpf_txrx.h
new file mode 100644
index 000000000000..32f312dbf22b
--- /dev/null
+++ b/drivers/net/ethernet/intel/idpf/idpf_txrx.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright (C) 2023 Intel Corporation */
+
+#ifndef _IDPF_TXRX_H_
+#define _IDPF_TXRX_H_
+
+/* Default vector sharing */
+#define IDPF_MBX_Q_VEC		1
+#define IDPF_MIN_Q_VEC		1
+
+#define IDPF_INT_NAME_STR_LEN   (IFNAMSIZ + 16)
+
+struct idpf_intr_reg {
+	void __iomem *dyn_ctl;
+	u32 dyn_ctl_intena_m;
+	u32 dyn_ctl_itridx_m;
+	void __iomem *icr_ena;
+	u32 icr_ena_ctlq_m;
+};
+
+struct idpf_q_vector {
+	u16 v_idx;		/* index in the vport->q_vector array */
+	struct idpf_intr_reg intr_reg;
+	char name[IDPF_INT_NAME_STR_LEN];
+};
+#endif /* !_IDPF_TXRX_H_ */
diff --git a/drivers/net/ethernet/intel/idpf/idpf_vf_dev.c b/drivers/net/ethernet/intel/idpf/idpf_vf_dev.c
index facf525e8e44..40ece76cbc16 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_vf_dev.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_vf_dev.c
@@ -44,6 +44,22 @@ static void idpf_vf_ctlq_reg_init(struct idpf_ctlq_create_info *cq)
 	}
 }
 
+/**
+ * idpf_vf_mb_intr_reg_init - Initialize the mailbox register
+ * @adapter: adapter structure
+ */
+static void idpf_vf_mb_intr_reg_init(struct idpf_adapter *adapter)
+{
+	struct idpf_intr_reg *intr = &adapter->mb_vector.intr_reg;
+	u32 dyn_ctl = le32_to_cpu(adapter->caps.mailbox_dyn_ctl);
+
+	intr->dyn_ctl = idpf_get_reg_addr(adapter, dyn_ctl);
+	intr->dyn_ctl_intena_m = VF_INT_DYN_CTL0_INTENA_M;
+	intr->dyn_ctl_itridx_m = VF_INT_DYN_CTL0_ITR_INDX_M;
+	intr->icr_ena = idpf_get_reg_addr(adapter, VF_INT_ICR0_ENA1);
+	intr->icr_ena_ctlq_m = VF_INT_ICR0_ENA1_ADMINQ_M;
+}
+
 /**
  * idpf_vf_reset_reg_init - Initialize reset registers
  * @adapter: Driver specific private structure
@@ -62,7 +78,10 @@ static void idpf_vf_reset_reg_init(struct idpf_adapter *adapter)
 static void idpf_vf_trigger_reset(struct idpf_adapter *adapter,
 				  enum idpf_flags trig_cause)
 {
-	/* stub */
+	/* Do not send VIRTCHNL2_OP_RESET_VF message on driver unload */
+	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);
 }
 
 /**
@@ -72,6 +91,7 @@ static void idpf_vf_trigger_reset(struct idpf_adapter *adapter,
 static void idpf_vf_reg_ops_init(struct idpf_adapter *adapter)
 {
 	adapter->dev_ops.reg_ops.ctlq_reg_init = idpf_vf_ctlq_reg_init;
+	adapter->dev_ops.reg_ops.mb_intr_reg_init = idpf_vf_mb_intr_reg_init;
 	adapter->dev_ops.reg_ops.reset_reg_init = idpf_vf_reset_reg_init;
 	adapter->dev_ops.reg_ops.trigger_reset = idpf_vf_trigger_reset;
 }
diff --git a/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c b/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c
index 87298c99027d..b26884b5cc60 100644
--- a/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c
+++ b/drivers/net/ethernet/intel/idpf/idpf_virtchnl.c
@@ -46,6 +46,635 @@ static int idpf_mb_clean(struct idpf_adapter *adapter)
 	return err;
 }
 
+/**
+ * idpf_send_mb_msg - Send message over mailbox
+ * @adapter: Driver specific private structure
+ * @op: virtchnl opcode
+ * @msg_size: size of the payload
+ * @msg: pointer to buffer holding the payload
+ *
+ * Will prepare the control queue message and initiates the send api
+ *
+ * Returns 0 on success, negative on failure
+ */
+int idpf_send_mb_msg(struct idpf_adapter *adapter, u32 op,
+		     u16 msg_size, u8 *msg)
+{
+	struct idpf_ctlq_msg *ctlq_msg;
+	struct idpf_dma_mem *dma_mem;
+	int err;
+
+	/* If we are here and a reset is detected nothing much can be
+	 * done. This thread should silently abort and expected to
+	 * be corrected with a new run either by user or driver
+	 * flows after reset
+	 */
+	if (idpf_is_reset_detected(adapter))
+		return 0;
+
+	err = idpf_mb_clean(adapter);
+	if (err)
+		return err;
+
+	ctlq_msg = kzalloc(sizeof(*ctlq_msg), GFP_ATOMIC);
+	if (!ctlq_msg)
+		return -ENOMEM;
+
+	dma_mem = kzalloc(sizeof(*dma_mem), GFP_ATOMIC);
+	if (!dma_mem) {
+		err = -ENOMEM;
+		goto dma_mem_error;
+	}
+
+	memset(ctlq_msg, 0, sizeof(struct idpf_ctlq_msg));
+	ctlq_msg->opcode = idpf_mbq_opc_send_msg_to_pf;
+	ctlq_msg->func_id = 0;
+	ctlq_msg->data_len = msg_size;
+	ctlq_msg->cookie.mbx.chnl_opcode = op;
+	ctlq_msg->cookie.mbx.chnl_retval = VIRTCHNL2_STATUS_SUCCESS;
+	dma_mem->size = IDPF_DFLT_MBX_BUF_SIZE;
+	dma_mem->va = dmam_alloc_coherent(&adapter->pdev->dev, dma_mem->size,
+					  &dma_mem->pa, GFP_ATOMIC);
+	if (!dma_mem->va) {
+		err = -ENOMEM;
+		goto dma_alloc_error;
+	}
+	memcpy(dma_mem->va, msg, msg_size);
+	ctlq_msg->ctx.indirect.payload = dma_mem;
+
+	err = idpf_ctlq_send(&adapter->hw, adapter->hw.asq, 1, ctlq_msg);
+	if (err)
+		goto send_error;
+
+	return 0;
+
+send_error:
+	dmam_free_coherent(&adapter->pdev->dev, dma_mem->size, dma_mem->va,
+			   dma_mem->pa);
+dma_alloc_error:
+	kfree(dma_mem);
+dma_mem_error:
+	kfree(ctlq_msg);
+
+	return err;
+}
+
+/**
+ * idpf_set_msg_pending_bit - Wait for clear and set msg pending
+ * @adapter: driver specific private structure
+ * @vport: virtual port structure
+ *
+ * If clear sets msg pending bit, otherwise waits for it to clear before
+ * setting it again. Returns 0 on success, negative on failure.
+ */
+static int idpf_set_msg_pending_bit(struct idpf_adapter *adapter,
+				    struct idpf_vport *vport)
+{
+	unsigned int retries = 100;
+
+	/* If msg pending bit already set, there's a message waiting to be
+	 * parsed and we must wait for it to be cleared before copying a new
+	 * message into the vc_msg buffer or else we'll stomp all over the
+	 * previous message.
+	 */
+	while (retries) {
+		if (!test_and_set_bit(__IDPF_VC_MSG_PENDING, adapter->flags))
+			break;
+		msleep(20);
+		retries--;
+	}
+
+	return retries ? 0 : -ETIMEDOUT;
+}
+
+/**
+ * idpf_set_msg_pending - Wait for msg pending bit and copy msg to buf
+ * @adapter: driver specific private structure
+ * @vport: virtual port structure
+ * @ctlq_msg: msg to copy from
+ * @err_enum: err bit to set on error
+ *
+ * Copies payload from ctlq_msg into vc_msg buf in adapter and sets msg pending
+ * bit. Returns 0 on success, negative on failure.
+ */
+static int idpf_set_msg_pending(struct idpf_adapter *adapter,
+				struct idpf_vport *vport,
+				struct idpf_ctlq_msg *ctlq_msg,
+				enum idpf_vport_vc_state err_enum)
+{
+	if (ctlq_msg->cookie.mbx.chnl_retval) {
+		set_bit(err_enum, adapter->vc_state);
+
+		return -EINVAL;
+	}
+
+	if (idpf_set_msg_pending_bit(adapter, vport)) {
+		set_bit(err_enum, adapter->vc_state);
+		dev_err(&adapter->pdev->dev, "Timed out setting msg pending\n");
+
+		return -ETIMEDOUT;
+	}
+
+	memcpy(adapter->vc_msg, ctlq_msg->ctx.indirect.payload->va,
+	       min_t(int, ctlq_msg->ctx.indirect.payload->size,
+		     IDPF_DFLT_MBX_BUF_SIZE));
+
+	return 0;
+}
+
+/**
+ * idpf_recv_vchnl_op - helper function with common logic when handling the
+ * reception of VIRTCHNL OPs.
+ * @adapter: driver specific private structure
+ * @vport: virtual port structure
+ * @ctlq_msg: msg to copy from
+ * @state: state bit used on timeout check
+ * @err_state: err bit to set on error
+ */
+static void idpf_recv_vchnl_op(struct idpf_adapter *adapter,
+			       struct idpf_vport *vport,
+			       struct idpf_ctlq_msg *ctlq_msg,
+			       enum idpf_vport_vc_state state,
+			       enum idpf_vport_vc_state err_state)
+{
+	wait_queue_head_t *vchnl_wq = &adapter->vchnl_wq;
+	int err;
+
+	err = idpf_set_msg_pending(adapter, vport, ctlq_msg, err_state);
+	if (wq_has_sleeper(vchnl_wq)) {
+		/* sleeper is present and we got the pending bit */
+		set_bit(state, adapter->vc_state);
+
+		wake_up(vchnl_wq);
+	} else {
+		if (!err) {
+			/* We got the pending bit, but release it if we cannot
+			 * find a thread waiting for the message.
+			 */
+			dev_warn(&adapter->pdev->dev, "opcode %d received without waiting thread\n",
+				 ctlq_msg->cookie.mbx.chnl_opcode);
+			clear_bit(__IDPF_VC_MSG_PENDING, adapter->flags);
+		} else {
+			/* Clear the errors since there is no sleeper to pass them on */
+			clear_bit(err_state, adapter->vc_state);
+		}
+	}
+}
+
+/**
+ * idpf_recv_mb_msg - Receive message over mailbox
+ * @adapter: Driver specific private structure
+ * @op: virtchannel operation code
+ * @msg: Received message holding buffer
+ * @msg_size: message size
+ *
+ * Will receive control queue message and posts the receive buffer. Returns 0
+ * on success and negative on failure.
+ */
+int idpf_recv_mb_msg(struct idpf_adapter *adapter, u32 op,
+		     void *msg, int msg_size)
+{
+	struct idpf_ctlq_msg ctlq_msg;
+	struct idpf_dma_mem *dma_mem;
+	bool work_done = false;
+	int num_retry = 2000;
+	u16 num_q_msg;
+	int err;
+
+	while (1) {
+		int payload_size = 0;
+
+		/* Try to get one message */
+		num_q_msg = 1;
+		dma_mem = NULL;
+		err = idpf_ctlq_recv(adapter->hw.arq, &num_q_msg, &ctlq_msg);
+		/* If no message then decide if we have to retry based on
+		 * opcode
+		 */
+		if (err || !num_q_msg) {
+			/* Increasing num_retry to consider the delayed
+			 * responses because of large number of VF's mailbox
+			 * messages. If the mailbox message is received from
+			 * the other side, we come out of the sleep cycle
+			 * immediately else we wait for more time.
+			 */
+			if (!op || !num_retry--)
+				break;
+			if (test_bit(__IDPF_REL_RES_IN_PROG, adapter->flags)) {
+				err = -EIO;
+				break;
+			}
+			msleep(20);
+			continue;
+		}
+
+		/* If we are here a message is received. Check if we are looking
+		 * for a specific message based on opcode. If it is different
+		 * ignore and post buffers
+		 */
+		if (op && ctlq_msg.cookie.mbx.chnl_opcode != op)
+			goto post_buffs;
+
+		if (ctlq_msg.data_len)
+			payload_size = ctlq_msg.ctx.indirect.payload->size;
+
+		/* All conditions are met. Either a message requested is
+		 * received or we received a message to be processed
+		 */
+		switch (ctlq_msg.cookie.mbx.chnl_opcode) {
+		case VIRTCHNL2_OP_VERSION:
+		case VIRTCHNL2_OP_GET_CAPS:
+			if (ctlq_msg.cookie.mbx.chnl_retval) {
+				dev_err(&adapter->pdev->dev, "Failure initializing, vc op: %u retval: %u\n",
+					ctlq_msg.cookie.mbx.chnl_opcode,
+					ctlq_msg.cookie.mbx.chnl_retval);
+				err = -EBADMSG;
+			} else if (msg) {
+				memcpy(msg, ctlq_msg.ctx.indirect.payload->va,
+				       min_t(int, payload_size, msg_size));
+			}
+			work_done = true;
+			break;
+		case VIRTCHNL2_OP_ALLOC_VECTORS:
+			idpf_recv_vchnl_op(adapter, NULL, &ctlq_msg,
+					   IDPF_VC_ALLOC_VECTORS,
+					   IDPF_VC_ALLOC_VECTORS_ERR);
+			break;
+		case VIRTCHNL2_OP_DEALLOC_VECTORS:
+			idpf_recv_vchnl_op(adapter, NULL, &ctlq_msg,
+					   IDPF_VC_DEALLOC_VECTORS,
+					   IDPF_VC_DEALLOC_VECTORS_ERR);
+			break;
+		default:
+			dev_warn(&adapter->pdev->dev,
+				 "Unhandled virtchnl response %d\n",
+				 ctlq_msg.cookie.mbx.chnl_opcode);
+			break;
+		}
+
+post_buffs:
+		if (ctlq_msg.data_len)
+			dma_mem = ctlq_msg.ctx.indirect.payload;
+		else
+			num_q_msg = 0;
+
+		err = idpf_ctlq_post_rx_buffs(&adapter->hw, adapter->hw.arq,
+					      &num_q_msg, &dma_mem);
+		/* If post failed clear the only buffer we supplied */
+		if (err && dma_mem)
+			dmam_free_coherent(&adapter->pdev->dev, dma_mem->size,
+					   dma_mem->va, dma_mem->pa);
+
+		/* Applies only if we are looking for a specific opcode */
+		if (work_done)
+			break;
+	}
+
+	return err;
+}
+
+/**
+ * __idpf_wait_for_event - wrapper function for wait on virtchannel response
+ * @adapter: Driver private data structure
+ * @vport: virtual port structure
+ * @state: check on state upon timeout
+ * @err_check: check if this specific error bit is set
+ * @timeout: Max time to wait
+ *
+ * Checks if state is set upon expiry of timeout.  Returns 0 on success,
+ * negative on failure.
+ */
+static int __idpf_wait_for_event(struct idpf_adapter *adapter,
+				 struct idpf_vport *vport,
+				 enum idpf_vport_vc_state state,
+				 enum idpf_vport_vc_state err_check,
+				 int timeout)
+{
+	int time_to_wait, num_waits;
+	wait_queue_head_t *vchnl_wq;
+	unsigned long *vc_state;
+
+	time_to_wait = ((timeout <= IDPF_MAX_WAIT) ? timeout : IDPF_MAX_WAIT);
+	num_waits = ((timeout <= IDPF_MAX_WAIT) ? 1 : timeout / IDPF_MAX_WAIT);
+
+	vchnl_wq = &adapter->vchnl_wq;
+	vc_state = adapter->vc_state;
+
+	while (num_waits) {
+		int event;
+
+		/* If we are here and a reset is detected do not wait but
+		 * return. Reset timing is out of drivers control. So
+		 * while we are cleaning resources as part of reset if the
+		 * underlying HW mailbox is gone, wait on mailbox messages
+		 * is not meaningful
+		 */
+		if (idpf_is_reset_detected(adapter))
+			return 0;
+
+		event = wait_event_timeout(*vchnl_wq,
+					   test_and_clear_bit(state, vc_state),
+					   msecs_to_jiffies(time_to_wait));
+		if (event) {
+			if (test_and_clear_bit(err_check, vc_state)) {
+				dev_err(&adapter->pdev->dev, "VC response error %s\n",
+					idpf_vport_vc_state_str[err_check]);
+
+				return -EINVAL;
+			}
+
+			return 0;
+		}
+		num_waits--;
+	}
+
+	/* Timeout occurred */
+	dev_err(&adapter->pdev->dev, "VC timeout, state = %s\n",
+		idpf_vport_vc_state_str[state]);
+
+	return -ETIMEDOUT;
+}
+
+/**
+ * idpf_min_wait_for_event - wait for virtchannel response
+ * @adapter: Driver private data structure
+ * @vport: virtual port structure
+ * @state: check on state upon timeout
+ * @err_check: check if this specific error bit is set
+ *
+ * Returns 0 on success, negative on failure.
+ */
+static int idpf_min_wait_for_event(struct idpf_adapter *adapter,
+				   struct idpf_vport *vport,
+				   enum idpf_vport_vc_state state,
+				   enum idpf_vport_vc_state err_check)
+{
+	return __idpf_wait_for_event(adapter, vport, state, err_check,
+				     IDPF_WAIT_FOR_EVENT_TIMEO_MIN);
+}
+
+/**
+ * idpf_wait_for_event - wait for virtchannel response
+ * @adapter: Driver private data structure
+ * @vport: virtual port structure
+ * @state: check on state upon timeout after 500ms
+ * @err_check: check if this specific error bit is set
+ *
+ * Returns 0 on success, negative on failure.
+ */
+static int idpf_wait_for_event(struct idpf_adapter *adapter,
+			       struct idpf_vport *vport,
+			       enum idpf_vport_vc_state state,
+			       enum idpf_vport_vc_state err_check)
+{
+	/* Increasing the timeout in __IDPF_INIT_SW flow to consider large
+	 * number of VF's mailbox message responses. When a message is received
+	 * on mailbox, this thread is wake up by the idpf_recv_mb_msg before the
+	 * timeout expires. Only in the error case i.e. if no message is
+	 * received on mailbox, we wait for the complete timeout which is
+	 * less likely to happen.
+	 */
+	return __idpf_wait_for_event(adapter, vport, state, err_check,
+				     IDPF_WAIT_FOR_EVENT_TIMEO);
+}
+
+/**
+ * idpf_send_ver_msg - send virtchnl version message
+ * @adapter: Driver specific private structure
+ *
+ * Send virtchnl version message.  Returns 0 on success, negative on failure.
+ */
+static int idpf_send_ver_msg(struct idpf_adapter *adapter)
+{
+	struct virtchnl2_version_info vvi;
+
+	if (adapter->virt_ver_maj) {
+		vvi.major = cpu_to_le32(adapter->virt_ver_maj);
+		vvi.minor = cpu_to_le32(adapter->virt_ver_min);
+	} else {
+		vvi.major = cpu_to_le32(IDPF_VIRTCHNL_VERSION_MAJOR);
+		vvi.minor = cpu_to_le32(IDPF_VIRTCHNL_VERSION_MINOR);
+	}
+
+	return idpf_send_mb_msg(adapter, VIRTCHNL2_OP_VERSION, sizeof(vvi),
+				(u8 *)&vvi);
+}
+
+/**
+ * idpf_recv_ver_msg - Receive virtchnl version message
+ * @adapter: Driver specific private structure
+ *
+ * Receive virtchnl version message. Returns 0 on success, -EAGAIN if we need
+ * to send version message again, otherwise negative on failure.
+ */
+static int idpf_recv_ver_msg(struct idpf_adapter *adapter)
+{
+	struct virtchnl2_version_info vvi;
+	u32 major, minor;
+	int err;
+
+	err = idpf_recv_mb_msg(adapter, VIRTCHNL2_OP_VERSION, &vvi, sizeof(vvi));
+	if (err)
+		return err;
+
+	major = le32_to_cpu(vvi.major);
+	minor = le32_to_cpu(vvi.minor);
+
+	if (major > IDPF_VIRTCHNL_VERSION_MAJOR) {
+		dev_warn(&adapter->pdev->dev, "Virtchnl major version greater than supported\n");
+
+		return -EINVAL;
+	}
+
+	if (major == IDPF_VIRTCHNL_VERSION_MAJOR &&
+	    minor > IDPF_VIRTCHNL_VERSION_MINOR)
+		dev_warn(&adapter->pdev->dev, "Virtchnl minor version didn't match\n");
+
+	/* If we have a mismatch, resend version to update receiver on what
+	 * version we will use.
+	 */
+	if (!adapter->virt_ver_maj &&
+	    major != IDPF_VIRTCHNL_VERSION_MAJOR &&
+	    minor != IDPF_VIRTCHNL_VERSION_MINOR)
+		err = -EAGAIN;
+
+	adapter->virt_ver_maj = major;
+	adapter->virt_ver_min = minor;
+
+	return err;
+}
+
+/**
+ * idpf_send_get_caps_msg - Send virtchnl get capabilities message
+ * @adapter: Driver specific private structure
+ *
+ * Send virtchl get capabilities message. Returns 0 on success, negative on
+ * failure.
+ */
+static int idpf_send_get_caps_msg(struct idpf_adapter *adapter)
+{
+	struct virtchnl2_get_capabilities caps = { };
+
+	caps.csum_caps =
+		cpu_to_le32(VIRTCHNL2_CAP_TX_CSUM_L3_IPV4	|
+			    VIRTCHNL2_CAP_TX_CSUM_L4_IPV4_TCP	|
+			    VIRTCHNL2_CAP_TX_CSUM_L4_IPV4_UDP	|
+			    VIRTCHNL2_CAP_TX_CSUM_L4_IPV4_SCTP	|
+			    VIRTCHNL2_CAP_TX_CSUM_L4_IPV6_TCP	|
+			    VIRTCHNL2_CAP_TX_CSUM_L4_IPV6_UDP	|
+			    VIRTCHNL2_CAP_TX_CSUM_L4_IPV6_SCTP	|
+			    VIRTCHNL2_CAP_RX_CSUM_L3_IPV4	|
+			    VIRTCHNL2_CAP_RX_CSUM_L4_IPV4_TCP	|
+			    VIRTCHNL2_CAP_RX_CSUM_L4_IPV4_UDP	|
+			    VIRTCHNL2_CAP_RX_CSUM_L4_IPV4_SCTP	|
+			    VIRTCHNL2_CAP_RX_CSUM_L4_IPV6_TCP	|
+			    VIRTCHNL2_CAP_RX_CSUM_L4_IPV6_UDP	|
+			    VIRTCHNL2_CAP_RX_CSUM_L4_IPV6_SCTP	|
+			    VIRTCHNL2_CAP_TX_CSUM_L3_SINGLE_TUNNEL |
+			    VIRTCHNL2_CAP_RX_CSUM_L3_SINGLE_TUNNEL |
+			    VIRTCHNL2_CAP_TX_CSUM_L4_SINGLE_TUNNEL |
+			    VIRTCHNL2_CAP_RX_CSUM_L4_SINGLE_TUNNEL |
+			    VIRTCHNL2_CAP_RX_CSUM_GENERIC);
+
+	caps.seg_caps =
+		cpu_to_le32(VIRTCHNL2_CAP_SEG_IPV4_TCP		|
+			    VIRTCHNL2_CAP_SEG_IPV4_UDP		|
+			    VIRTCHNL2_CAP_SEG_IPV4_SCTP		|
+			    VIRTCHNL2_CAP_SEG_IPV6_TCP		|
+			    VIRTCHNL2_CAP_SEG_IPV6_UDP		|
+			    VIRTCHNL2_CAP_SEG_IPV6_SCTP		|
+			    VIRTCHNL2_CAP_SEG_TX_SINGLE_TUNNEL);
+
+	caps.rss_caps =
+		cpu_to_le64(VIRTCHNL2_CAP_RSS_IPV4_TCP		|
+			    VIRTCHNL2_CAP_RSS_IPV4_UDP		|
+			    VIRTCHNL2_CAP_RSS_IPV4_SCTP		|
+			    VIRTCHNL2_CAP_RSS_IPV4_OTHER	|
+			    VIRTCHNL2_CAP_RSS_IPV6_TCP		|
+			    VIRTCHNL2_CAP_RSS_IPV6_UDP		|
+			    VIRTCHNL2_CAP_RSS_IPV6_SCTP		|
+			    VIRTCHNL2_CAP_RSS_IPV6_OTHER);
+
+	caps.hsplit_caps =
+		cpu_to_le32(VIRTCHNL2_CAP_RX_HSPLIT_AT_L4V4	|
+			    VIRTCHNL2_CAP_RX_HSPLIT_AT_L4V6);
+
+	caps.rsc_caps =
+		cpu_to_le32(VIRTCHNL2_CAP_RSC_IPV4_TCP		|
+			    VIRTCHNL2_CAP_RSC_IPV6_TCP);
+
+	caps.other_caps =
+		cpu_to_le64(VIRTCHNL2_CAP_SRIOV			|
+			    VIRTCHNL2_CAP_MACFILTER		|
+			    VIRTCHNL2_CAP_SPLITQ_QSCHED		|
+			    VIRTCHNL2_CAP_PROMISC		|
+			    VIRTCHNL2_CAP_LOOPBACK		|
+			    VIRTCHNL2_CAP_MISS_COMPL_TAG);
+
+	return idpf_send_mb_msg(adapter, VIRTCHNL2_OP_GET_CAPS, sizeof(caps),
+				(u8 *)&caps);
+}
+
+/**
+ * idpf_recv_get_caps_msg - Receive virtchnl get capabilities message
+ * @adapter: Driver specific private structure
+ *
+ * Receive virtchnl get capabilities message. Returns 0 on success, negative on
+ * failure.
+ */
+static int idpf_recv_get_caps_msg(struct idpf_adapter *adapter)
+{
+	return idpf_recv_mb_msg(adapter, VIRTCHNL2_OP_GET_CAPS, &adapter->caps,
+				sizeof(struct virtchnl2_get_capabilities));
+}
+
+/**
+ * idpf_send_alloc_vectors_msg - Send virtchnl alloc vectors message
+ * @adapter: Driver specific private structure
+ * @num_vectors: number of vectors to be allocated
+ *
+ * Returns 0 on success, negative on failure.
+ */
+int idpf_send_alloc_vectors_msg(struct idpf_adapter *adapter, u16 num_vectors)
+{
+	struct virtchnl2_alloc_vectors *alloc_vec, *rcvd_vec;
+	struct virtchnl2_alloc_vectors ac = { };
+	u16 num_vchunks;
+	int size, err;
+
+	ac.num_vectors = cpu_to_le16(num_vectors);
+
+	err = idpf_send_mb_msg(adapter, VIRTCHNL2_OP_ALLOC_VECTORS,
+			       sizeof(ac), (u8 *)&ac);
+	if (err)
+		return err;
+
+	err = idpf_wait_for_event(adapter, NULL, IDPF_VC_ALLOC_VECTORS,
+				  IDPF_VC_ALLOC_VECTORS_ERR);
+	if (err)
+		return err;
+
+	rcvd_vec = (struct virtchnl2_alloc_vectors *)adapter->vc_msg;
+	num_vchunks = le16_to_cpu(rcvd_vec->vchunks.num_vchunks);
+
+	size = struct_size(rcvd_vec, vchunks.vchunks, num_vchunks);
+	if (size > sizeof(adapter->vc_msg)) {
+		err = -EINVAL;
+		goto error;
+	}
+
+	kfree(adapter->req_vec_chunks);
+	adapter->req_vec_chunks = NULL;
+	adapter->req_vec_chunks = kmemdup(adapter->vc_msg, size, GFP_KERNEL);
+	if (!adapter->req_vec_chunks) {
+		err = -ENOMEM;
+		goto error;
+	}
+
+	alloc_vec = adapter->req_vec_chunks;
+	if (le16_to_cpu(alloc_vec->num_vectors) < num_vectors) {
+		kfree(adapter->req_vec_chunks);
+		adapter->req_vec_chunks = NULL;
+		err = -EINVAL;
+	}
+
+error:
+	clear_bit(__IDPF_VC_MSG_PENDING, adapter->flags);
+
+	return err;
+}
+
+/**
+ * idpf_send_dealloc_vectors_msg - Send virtchnl de allocate vectors message
+ * @adapter: Driver specific private structure
+ *
+ * Returns 0 on success, negative on failure.
+ */
+int idpf_send_dealloc_vectors_msg(struct idpf_adapter *adapter)
+{
+	struct virtchnl2_alloc_vectors *ac = adapter->req_vec_chunks;
+	struct virtchnl2_vector_chunks *vcs = &ac->vchunks;
+	int buf_size, err;
+
+	buf_size = struct_size(vcs, vchunks, le16_to_cpu(vcs->num_vchunks));
+
+	err = idpf_send_mb_msg(adapter, VIRTCHNL2_OP_DEALLOC_VECTORS, buf_size,
+			       (u8 *)vcs);
+	if (err)
+		return err;
+
+	err = idpf_min_wait_for_event(adapter, NULL, IDPF_VC_DEALLOC_VECTORS,
+				      IDPF_VC_DEALLOC_VECTORS_ERR);
+	if (err)
+		return err;
+
+	kfree(adapter->req_vec_chunks);
+	adapter->req_vec_chunks = NULL;
+	clear_bit(__IDPF_VC_MSG_PENDING, adapter->flags);
+
+	return 0;
+}
+
 /**
  * idpf_find_ctlq - Given a type and id, find ctlq info
  * @hw: hardware struct
@@ -126,3 +755,175 @@ void idpf_deinit_dflt_mbx(struct idpf_adapter *adapter)
 	adapter->hw.arq = NULL;
 	adapter->hw.asq = NULL;
 }
+
+/**
+ * idpf_vc_core_init - Initialize state machine and get driver specific
+ * resources
+ * @adapter: Driver specific private structure
+ *
+ * This function will initialize the state machine and request all necessary
+ * resources required by the device driver. Once the state machine is
+ * initialized, allocate memory to store vport specific information and also
+ * requests required interrupts.
+ *
+ * Returns 0 on success, -EAGAIN function will get called again,
+ * otherwise negative on failure.
+ */
+int idpf_vc_core_init(struct idpf_adapter *adapter)
+{
+	int task_delay = 30;
+	int err = 0;
+
+	while (adapter->state != __IDPF_INIT_SW) {
+		switch (adapter->state) {
+		case __IDPF_STARTUP:
+			if (idpf_send_ver_msg(adapter))
+				goto init_failed;
+			adapter->state = __IDPF_VER_CHECK;
+			goto restart;
+		case __IDPF_VER_CHECK:
+			err = idpf_recv_ver_msg(adapter);
+			if (err == -EIO) {
+				return err;
+			} else if (err == -EAGAIN) {
+				adapter->state = __IDPF_STARTUP;
+				goto restart;
+			} else if (err) {
+				goto init_failed;
+			}
+			if (idpf_send_get_caps_msg(adapter))
+				goto init_failed;
+			adapter->state = __IDPF_GET_CAPS;
+			goto restart;
+		case __IDPF_GET_CAPS:
+			if (idpf_recv_get_caps_msg(adapter))
+				goto init_failed;
+			adapter->state = __IDPF_INIT_SW;
+			break;
+		default:
+			dev_err(&adapter->pdev->dev, "Device is in bad state: %d\n",
+				adapter->state);
+			goto init_failed;
+		}
+		break;
+restart:
+		/* Give enough time before proceeding further with
+		 * state machine
+		 */
+		msleep(task_delay);
+	}
+
+	/* Start the service task before requesting vectors. This will ensure
+	 * vector information response from mailbox is handled
+	 */
+	queue_delayed_work(adapter->serv_wq, &adapter->serv_task,
+			   msecs_to_jiffies(5 * (adapter->pdev->devfn & 0x07)));
+
+	err = idpf_intr_req(adapter);
+	if (err) {
+		dev_err(&adapter->pdev->dev, "failed to enable interrupt vectors: %d\n",
+			err);
+		goto err_intr_req;
+	}
+
+	goto no_err;
+
+err_intr_req:
+	cancel_delayed_work_sync(&adapter->serv_task);
+no_err:
+	return err;
+
+init_failed:
+	if (++adapter->mb_wait_count > IDPF_MB_MAX_ERR) {
+		dev_err(&adapter->pdev->dev, "Failed to establish mailbox communications with hardware\n");
+
+		return -EFAULT;
+	}
+	/* If it reached here, it is possible that mailbox queue initialization
+	 * register writes might not have taken effect. Retry to initialize
+	 * the mailbox again
+	 */
+	adapter->state = __IDPF_STARTUP;
+	idpf_deinit_dflt_mbx(adapter);
+	set_bit(__IDPF_HR_DRV_LOAD, adapter->flags);
+	queue_delayed_work(adapter->vc_event_wq, &adapter->vc_event_task,
+			   msecs_to_jiffies(task_delay));
+
+	return -EAGAIN;
+}
+
+/**
+ * idpf_vc_core_deinit - Device deinit routine
+ * @adapter: Driver specific private structure
+ *
+ */
+void idpf_vc_core_deinit(struct idpf_adapter *adapter)
+{
+	int i;
+
+	set_bit(__IDPF_REL_RES_IN_PROG, adapter->flags);
+
+	idpf_intr_rel(adapter);
+	/* Set all bits as we dont know on which vc_state the vhnl_wq is
+	 * waiting on and wakeup the virtchnl workqueue even if it is waiting
+	 * for the response as we are going down
+	 */
+	for (i = 0; i < IDPF_VC_NBITS; i++)
+		set_bit(i, adapter->vc_state);
+	wake_up(&adapter->vchnl_wq);
+
+	/* Required to indicate periodic task not to schedule again */
+	set_bit(__IDPF_CANCEL_SERVICE_TASK, adapter->flags);
+	cancel_delayed_work_sync(&adapter->serv_task);
+	clear_bit(__IDPF_CANCEL_SERVICE_TASK, adapter->flags);
+	/* Clear all the bits */
+	for (i = 0; i < IDPF_VC_NBITS; i++)
+		clear_bit(i, adapter->vc_state);
+
+	clear_bit(__IDPF_REL_RES_IN_PROG, adapter->flags);
+}
+
+/**
+ * idpf_get_vec_ids - Initialize vector id from Mailbox parameters
+ * @adapter: adapter structure to get the mailbox vector id
+ * @vecids: Array of vector ids
+ * @num_vecids: number of vector ids
+ * @chunks: vector ids received over mailbox
+ *
+ * Will initialize the mailbox vector id which is received from the
+ * get capabilities and data queue vector ids with ids received as
+ * mailbox parameters.
+ * Returns number of ids filled
+ */
+int idpf_get_vec_ids(struct idpf_adapter *adapter,
+		     u16 *vecids, int num_vecids,
+		     struct virtchnl2_vector_chunks *chunks)
+{
+	u16 num_chunks = le16_to_cpu(chunks->num_vchunks);
+	int num_vecid_filled = 0;
+	int i, j;
+
+	vecids[num_vecid_filled] = adapter->mb_vector.v_idx;
+	num_vecid_filled++;
+
+	for (j = 0; j < num_chunks; j++) {
+		struct virtchnl2_vector_chunk *chunk;
+		u16 start_vecid, num_vec;
+
+		chunk = &chunks->vchunks[j];
+		num_vec = le16_to_cpu(chunk->num_vectors);
+		start_vecid = le16_to_cpu(chunk->start_vector_id);
+
+		for (i = 0; i < num_vec; i++) {
+			if ((num_vecid_filled + i) < num_vecids) {
+				vecids[num_vecid_filled + i] = start_vecid;
+				start_vecid++;
+			} else {
+				break;
+			}
+		}
+		num_vecid_filled = num_vecid_filled + i;
+	}
+
+	return num_vecid_filled;
+}
