Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

4 files changed, 1461 insertions, 0 deletions

diff --git a/drivers/vdpa/ifcvf/Makefile b/drivers/vdpa/ifcvf/Makefile
new file mode 100644
index 000000000..d70991599
--- /dev/null
+++ b/drivers/vdpa/ifcvf/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_IFCVF) += ifcvf.o
+ifcvf-$(CONFIG_IFCVF) += ifcvf_main.o ifcvf_base.o
diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c
new file mode 100644
index 000000000..3ec5ca3ae
--- /dev/null
+++ b/drivers/vdpa/ifcvf/ifcvf_base.c
@@ -0,0 +1,393 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Intel IFC VF NIC driver for virtio dataplane offloading
+ *
+ * Copyright (C) 2020 Intel Corporation.
+ *
+ * Author: Zhu Lingshan <lingshan.zhu@intel.com>
+ *
+ */
+
+#include "ifcvf_base.h"
+
+u16 ifcvf_set_vq_vector(struct ifcvf_hw *hw, u16 qid, int vector)
+{
+	struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg;
+
+	vp_iowrite16(qid, &cfg->queue_select);
+	vp_iowrite16(vector, &cfg->queue_msix_vector);
+
+	return vp_ioread16(&cfg->queue_msix_vector);
+}
+
+u16 ifcvf_set_config_vector(struct ifcvf_hw *hw, int vector)
+{
+	struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg;
+
+	vp_iowrite16(vector,  &cfg->msix_config);
+
+	return vp_ioread16(&cfg->msix_config);
+}
+
+static void __iomem *get_cap_addr(struct ifcvf_hw *hw,
+				  struct virtio_pci_cap *cap)
+{
+	u32 length, offset;
+	u8 bar;
+
+	length = le32_to_cpu(cap->length);
+	offset = le32_to_cpu(cap->offset);
+	bar = cap->bar;
+
+	if (bar >= IFCVF_PCI_MAX_RESOURCE) {
+		IFCVF_DBG(hw->pdev,
+			  "Invalid bar number %u to get capabilities\n", bar);
+		return NULL;
+	}
+
+	if (offset + length > pci_resource_len(hw->pdev, bar)) {
+		IFCVF_DBG(hw->pdev,
+			  "offset(%u) + len(%u) overflows bar%u's capability\n",
+			  offset, length, bar);
+		return NULL;
+	}
+
+	return hw->base[bar] + offset;
+}
+
+static int ifcvf_read_config_range(struct pci_dev *dev,
+				   uint32_t *val, int size, int where)
+{
+	int ret, i;
+
+	for (i = 0; i < size; i += 4) {
+		ret = pci_read_config_dword(dev, where + i, val + i / 4);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *pdev)
+{
+	struct virtio_pci_cap cap;
+	u16 notify_off;
+	int ret;
+	u8 pos;
+	u32 i;
+
+	ret = pci_read_config_byte(pdev, PCI_CAPABILITY_LIST, &pos);
+	if (ret < 0) {
+		IFCVF_ERR(pdev, "Failed to read PCI capability list\n");
+		return -EIO;
+	}
+	hw->pdev = pdev;
+
+	while (pos) {
+		ret = ifcvf_read_config_range(pdev, (u32 *)&cap,
+					      sizeof(cap), pos);
+		if (ret < 0) {
+			IFCVF_ERR(pdev,
+				  "Failed to get PCI capability at %x\n", pos);
+			break;
+		}
+
+		if (cap.cap_vndr != PCI_CAP_ID_VNDR)
+			goto next;
+
+		switch (cap.cfg_type) {
+		case VIRTIO_PCI_CAP_COMMON_CFG:
+			hw->common_cfg = get_cap_addr(hw, &cap);
+			IFCVF_DBG(pdev, "hw->common_cfg = %p\n",
+				  hw->common_cfg);
+			break;
+		case VIRTIO_PCI_CAP_NOTIFY_CFG:
+			pci_read_config_dword(pdev, pos + sizeof(cap),
+					      &hw->notify_off_multiplier);
+			hw->notify_bar = cap.bar;
+			hw->notify_base = get_cap_addr(hw, &cap);
+			hw->notify_base_pa = pci_resource_start(pdev, cap.bar) +
+					le32_to_cpu(cap.offset);
+			IFCVF_DBG(pdev, "hw->notify_base = %p\n",
+				  hw->notify_base);
+			break;
+		case VIRTIO_PCI_CAP_ISR_CFG:
+			hw->isr = get_cap_addr(hw, &cap);
+			IFCVF_DBG(pdev, "hw->isr = %p\n", hw->isr);
+			break;
+		case VIRTIO_PCI_CAP_DEVICE_CFG:
+			hw->dev_cfg = get_cap_addr(hw, &cap);
+			hw->cap_dev_config_size = le32_to_cpu(cap.length);
+			IFCVF_DBG(pdev, "hw->dev_cfg = %p\n", hw->dev_cfg);
+			break;
+		}
+
+next:
+		pos = cap.cap_next;
+	}
+
+	if (hw->common_cfg == NULL || hw->notify_base == NULL ||
+	    hw->isr == NULL || hw->dev_cfg == NULL) {
+		IFCVF_ERR(pdev, "Incomplete PCI capabilities\n");
+		return -EIO;
+	}
+
+	hw->nr_vring = vp_ioread16(&hw->common_cfg->num_queues);
+
+	for (i = 0; i < hw->nr_vring; i++) {
+		vp_iowrite16(i, &hw->common_cfg->queue_select);
+		notify_off = vp_ioread16(&hw->common_cfg->queue_notify_off);
+		hw->vring[i].notify_addr = hw->notify_base +
+			notify_off * hw->notify_off_multiplier;
+		hw->vring[i].notify_pa = hw->notify_base_pa +
+			notify_off * hw->notify_off_multiplier;
+		hw->vring[i].irq = -EINVAL;
+	}
+
+	hw->lm_cfg = hw->base[IFCVF_LM_BAR];
+
+	IFCVF_DBG(pdev,
+		  "PCI capability mapping: common cfg: %p, notify base: %p\n, isr cfg: %p, device cfg: %p, multiplier: %u\n",
+		  hw->common_cfg, hw->notify_base, hw->isr,
+		  hw->dev_cfg, hw->notify_off_multiplier);
+
+	hw->vqs_reused_irq = -EINVAL;
+	hw->config_irq = -EINVAL;
+
+	return 0;
+}
+
+u8 ifcvf_get_status(struct ifcvf_hw *hw)
+{
+	return vp_ioread8(&hw->common_cfg->device_status);
+}
+
+void ifcvf_set_status(struct ifcvf_hw *hw, u8 status)
+{
+	vp_iowrite8(status, &hw->common_cfg->device_status);
+}
+
+void ifcvf_reset(struct ifcvf_hw *hw)
+{
+	hw->config_cb.callback = NULL;
+	hw->config_cb.private = NULL;
+
+	ifcvf_set_status(hw, 0);
+	/* flush set_status, make sure VF is stopped, reset */
+	ifcvf_get_status(hw);
+}
+
+static void ifcvf_add_status(struct ifcvf_hw *hw, u8 status)
+{
+	if (status != 0)
+		status |= ifcvf_get_status(hw);
+
+	ifcvf_set_status(hw, status);
+	ifcvf_get_status(hw);
+}
+
+u64 ifcvf_get_hw_features(struct ifcvf_hw *hw)
+{
+	struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg;
+	u32 features_lo, features_hi;
+	u64 features;
+
+	vp_iowrite32(0, &cfg->device_feature_select);
+	features_lo = vp_ioread32(&cfg->device_feature);
+
+	vp_iowrite32(1, &cfg->device_feature_select);
+	features_hi = vp_ioread32(&cfg->device_feature);
+
+	features = ((u64)features_hi << 32) | features_lo;
+
+	return features;
+}
+
+u64 ifcvf_get_features(struct ifcvf_hw *hw)
+{
+	return hw->hw_features;
+}
+
+int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features)
+{
+	if (!(features & BIT_ULL(VIRTIO_F_ACCESS_PLATFORM)) && features) {
+		IFCVF_ERR(hw->pdev, "VIRTIO_F_ACCESS_PLATFORM is not negotiated\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+u32 ifcvf_get_config_size(struct ifcvf_hw *hw)
+{
+	u32 net_config_size = sizeof(struct virtio_net_config);
+	u32 blk_config_size = sizeof(struct virtio_blk_config);
+	u32 cap_size = hw->cap_dev_config_size;
+	u32 config_size;
+
+	/* If the onboard device config space size is greater than
+	 * the size of struct virtio_net/blk_config, only the spec
+	 * implementing contents size is returned, this is very
+	 * unlikely, defensive programming.
+	 */
+	switch (hw->dev_type) {
+	case VIRTIO_ID_NET:
+		config_size = min(cap_size, net_config_size);
+		break;
+	case VIRTIO_ID_BLOCK:
+		config_size = min(cap_size, blk_config_size);
+		break;
+	default:
+		config_size = 0;
+		IFCVF_ERR(hw->pdev, "VIRTIO ID %u not supported\n", hw->dev_type);
+	}
+
+	return config_size;
+}
+
+void ifcvf_read_dev_config(struct ifcvf_hw *hw, u64 offset,
+			   void *dst, int length)
+{
+	u8 old_gen, new_gen, *p;
+	int i;
+
+	WARN_ON(offset + length > hw->config_size);
+	do {
+		old_gen = vp_ioread8(&hw->common_cfg->config_generation);
+		p = dst;
+		for (i = 0; i < length; i++)
+			*p++ = vp_ioread8(hw->dev_cfg + offset + i);
+
+		new_gen = vp_ioread8(&hw->common_cfg->config_generation);
+	} while (old_gen != new_gen);
+}
+
+void ifcvf_write_dev_config(struct ifcvf_hw *hw, u64 offset,
+			    const void *src, int length)
+{
+	const u8 *p;
+	int i;
+
+	p = src;
+	WARN_ON(offset + length > hw->config_size);
+	for (i = 0; i < length; i++)
+		vp_iowrite8(*p++, hw->dev_cfg + offset + i);
+}
+
+static void ifcvf_set_features(struct ifcvf_hw *hw, u64 features)
+{
+	struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg;
+
+	vp_iowrite32(0, &cfg->guest_feature_select);
+	vp_iowrite32((u32)features, &cfg->guest_feature);
+
+	vp_iowrite32(1, &cfg->guest_feature_select);
+	vp_iowrite32(features >> 32, &cfg->guest_feature);
+}
+
+static int ifcvf_config_features(struct ifcvf_hw *hw)
+{
+	ifcvf_set_features(hw, hw->req_features);
+	ifcvf_add_status(hw, VIRTIO_CONFIG_S_FEATURES_OK);
+
+	if (!(ifcvf_get_status(hw) & VIRTIO_CONFIG_S_FEATURES_OK)) {
+		IFCVF_ERR(hw->pdev, "Failed to set FEATURES_OK status\n");
+		return -EIO;
+	}
+
+	return 0;
+}
+
+u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid)
+{
+	struct ifcvf_lm_cfg __iomem *ifcvf_lm;
+	void __iomem *avail_idx_addr;
+	u16 last_avail_idx;
+	u32 q_pair_id;
+
+	ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg;
+	q_pair_id = qid / 2;
+	avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2];
+	last_avail_idx = vp_ioread16(avail_idx_addr);
+
+	return last_avail_idx;
+}
+
+int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num)
+{
+	struct ifcvf_lm_cfg __iomem *ifcvf_lm;
+	void __iomem *avail_idx_addr;
+	u32 q_pair_id;
+
+	ifcvf_lm = (struct ifcvf_lm_cfg __iomem *)hw->lm_cfg;
+	q_pair_id = qid / 2;
+	avail_idx_addr = &ifcvf_lm->vring_lm_cfg[q_pair_id].idx_addr[qid % 2];
+	hw->vring[qid].last_avail_idx = num;
+	vp_iowrite16(num, avail_idx_addr);
+
+	return 0;
+}
+
+static int ifcvf_hw_enable(struct ifcvf_hw *hw)
+{
+	struct virtio_pci_common_cfg __iomem *cfg;
+	u32 i;
+
+	cfg = hw->common_cfg;
+	for (i = 0; i < hw->nr_vring; i++) {
+		if (!hw->vring[i].ready)
+			break;
+
+		vp_iowrite16(i, &cfg->queue_select);
+		vp_iowrite64_twopart(hw->vring[i].desc, &cfg->queue_desc_lo,
+				     &cfg->queue_desc_hi);
+		vp_iowrite64_twopart(hw->vring[i].avail, &cfg->queue_avail_lo,
+				      &cfg->queue_avail_hi);
+		vp_iowrite64_twopart(hw->vring[i].used, &cfg->queue_used_lo,
+				     &cfg->queue_used_hi);
+		vp_iowrite16(hw->vring[i].size, &cfg->queue_size);
+		ifcvf_set_vq_state(hw, i, hw->vring[i].last_avail_idx);
+		vp_iowrite16(1, &cfg->queue_enable);
+	}
+
+	return 0;
+}
+
+static void ifcvf_hw_disable(struct ifcvf_hw *hw)
+{
+	u32 i;
+
+	ifcvf_set_config_vector(hw, VIRTIO_MSI_NO_VECTOR);
+	for (i = 0; i < hw->nr_vring; i++) {
+		ifcvf_set_vq_vector(hw, i, VIRTIO_MSI_NO_VECTOR);
+	}
+}
+
+int ifcvf_start_hw(struct ifcvf_hw *hw)
+{
+	ifcvf_reset(hw);
+	ifcvf_add_status(hw, VIRTIO_CONFIG_S_ACKNOWLEDGE);
+	ifcvf_add_status(hw, VIRTIO_CONFIG_S_DRIVER);
+
+	if (ifcvf_config_features(hw) < 0)
+		return -EINVAL;
+
+	if (ifcvf_hw_enable(hw) < 0)
+		return -EINVAL;
+
+	ifcvf_add_status(hw, VIRTIO_CONFIG_S_DRIVER_OK);
+
+	return 0;
+}
+
+void ifcvf_stop_hw(struct ifcvf_hw *hw)
+{
+	ifcvf_hw_disable(hw);
+	ifcvf_reset(hw);
+}
+
+void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid)
+{
+	vp_iowrite16(qid, hw->vring[qid].notify_addr);
+}
diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
new file mode 100644
index 000000000..25bd4e927
--- /dev/null
+++ b/drivers/vdpa/ifcvf/ifcvf_base.h
@@ -0,0 +1,140 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Intel IFC VF NIC driver for virtio dataplane offloading
+ *
+ * Copyright (C) 2020 Intel Corporation.
+ *
+ * Author: Zhu Lingshan <lingshan.zhu@intel.com>
+ *
+ */
+
+#ifndef _IFCVF_H_
+#define _IFCVF_H_
+
+#include <linux/pci.h>
+#include <linux/pci_regs.h>
+#include <linux/vdpa.h>
+#include <linux/virtio_pci_modern.h>
+#include <uapi/linux/virtio_net.h>
+#include <uapi/linux/virtio_blk.h>
+#include <uapi/linux/virtio_config.h>
+#include <uapi/linux/virtio_pci.h>
+
+#define N3000_DEVICE_ID		0x1041
+#define N3000_SUBSYS_DEVICE_ID	0x001A
+
+/* Max 8 data queue pairs(16 queues) and one control vq for now. */
+#define IFCVF_MAX_QUEUES	17
+
+#define IFCVF_QUEUE_ALIGNMENT	PAGE_SIZE
+#define IFCVF_QUEUE_MAX		32768
+#define IFCVF_PCI_MAX_RESOURCE	6
+
+#define IFCVF_LM_CFG_SIZE		0x40
+#define IFCVF_LM_RING_STATE_OFFSET	0x20
+#define IFCVF_LM_BAR			4
+
+#define IFCVF_ERR(pdev, fmt, ...)	dev_err(&pdev->dev, fmt, ##__VA_ARGS__)
+#define IFCVF_DBG(pdev, fmt, ...)	dev_dbg(&pdev->dev, fmt, ##__VA_ARGS__)
+#define IFCVF_INFO(pdev, fmt, ...)	dev_info(&pdev->dev, fmt, ##__VA_ARGS__)
+
+#define ifcvf_private_to_vf(adapter) \
+	(((struct ifcvf_adapter *)adapter)->vf)
+
+/* all vqs and config interrupt has its own vector */
+#define MSIX_VECTOR_PER_VQ_AND_CONFIG		1
+/* all vqs share a vector, and config interrupt has a separate vector */
+#define MSIX_VECTOR_SHARED_VQ_AND_CONFIG	2
+/* all vqs and config interrupt share a vector */
+#define MSIX_VECTOR_DEV_SHARED			3
+
+struct vring_info {
+	u64 desc;
+	u64 avail;
+	u64 used;
+	u16 size;
+	u16 last_avail_idx;
+	bool ready;
+	void __iomem *notify_addr;
+	phys_addr_t notify_pa;
+	u32 irq;
+	struct vdpa_callback cb;
+	char msix_name[256];
+};
+
+struct ifcvf_hw {
+	u8 __iomem *isr;
+	/* Live migration */
+	u8 __iomem *lm_cfg;
+	/* Notification bar number */
+	u8 notify_bar;
+	u8 msix_vector_status;
+	/* virtio-net or virtio-blk device config size */
+	u32 config_size;
+	/* Notificaiton bar address */
+	void __iomem *notify_base;
+	phys_addr_t notify_base_pa;
+	u32 notify_off_multiplier;
+	u32 dev_type;
+	u64 req_features;
+	u64 hw_features;
+	struct virtio_pci_common_cfg __iomem *common_cfg;
+	void __iomem *dev_cfg;
+	struct vring_info vring[IFCVF_MAX_QUEUES];
+	void __iomem * const *base;
+	char config_msix_name[256];
+	struct vdpa_callback config_cb;
+	int config_irq;
+	int vqs_reused_irq;
+	u16 nr_vring;
+	/* VIRTIO_PCI_CAP_DEVICE_CFG size */
+	u32 cap_dev_config_size;
+	struct pci_dev *pdev;
+};
+
+struct ifcvf_adapter {
+	struct vdpa_device vdpa;
+	struct pci_dev *pdev;
+	struct ifcvf_hw *vf;
+};
+
+struct ifcvf_vring_lm_cfg {
+	u32 idx_addr[2];
+	u8 reserved[IFCVF_LM_CFG_SIZE - 8];
+};
+
+struct ifcvf_lm_cfg {
+	u8 reserved[IFCVF_LM_RING_STATE_OFFSET];
+	struct ifcvf_vring_lm_cfg vring_lm_cfg[IFCVF_MAX_QUEUES];
+};
+
+struct ifcvf_vdpa_mgmt_dev {
+	struct vdpa_mgmt_dev mdev;
+	struct ifcvf_hw vf;
+	struct ifcvf_adapter *adapter;
+	struct pci_dev *pdev;
+};
+
+int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *dev);
+int ifcvf_start_hw(struct ifcvf_hw *hw);
+void ifcvf_stop_hw(struct ifcvf_hw *hw);
+void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid);
+void ifcvf_read_dev_config(struct ifcvf_hw *hw, u64 offset,
+			   void *dst, int length);
+void ifcvf_write_dev_config(struct ifcvf_hw *hw, u64 offset,
+			    const void *src, int length);
+u8 ifcvf_get_status(struct ifcvf_hw *hw);
+void ifcvf_set_status(struct ifcvf_hw *hw, u8 status);
+void io_write64_twopart(u64 val, u32 *lo, u32 *hi);
+void ifcvf_reset(struct ifcvf_hw *hw);
+u64 ifcvf_get_features(struct ifcvf_hw *hw);
+u64 ifcvf_get_hw_features(struct ifcvf_hw *hw);
+int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features);
+u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid);
+int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num);
+struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw);
+int ifcvf_probed_virtio_net(struct ifcvf_hw *hw);
+u32 ifcvf_get_config_size(struct ifcvf_hw *hw);
+u16 ifcvf_set_vq_vector(struct ifcvf_hw *hw, u16 qid, int vector);
+u16 ifcvf_set_config_vector(struct ifcvf_hw *hw, int vector);
+#endif /* _IFCVF_H_ */
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
new file mode 100644
index 000000000..d5036f49f
--- /dev/null
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -0,0 +1,925 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Intel IFC VF NIC driver for virtio dataplane offloading
+ *
+ * Copyright (C) 2020 Intel Corporation.
+ *
+ * Author: Zhu Lingshan <lingshan.zhu@intel.com>
+ *
+ */
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/sysfs.h>
+#include "ifcvf_base.h"
+
+#define DRIVER_AUTHOR   "Intel Corporation"
+#define IFCVF_DRIVER_NAME       "ifcvf"
+
+static irqreturn_t ifcvf_config_changed(int irq, void *arg)
+{
+	struct ifcvf_hw *vf = arg;
+
+	if (vf->config_cb.callback)
+		return vf->config_cb.callback(vf->config_cb.private);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t ifcvf_vq_intr_handler(int irq, void *arg)
+{
+	struct vring_info *vring = arg;
+
+	if (vring->cb.callback)
+		return vring->cb.callback(vring->cb.private);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t ifcvf_vqs_reused_intr_handler(int irq, void *arg)
+{
+	struct ifcvf_hw *vf = arg;
+	struct vring_info *vring;
+	int i;
+
+	for (i = 0; i < vf->nr_vring; i++) {
+		vring = &vf->vring[i];
+		if (vring->cb.callback)
+			vring->cb.callback(vring->cb.private);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t ifcvf_dev_intr_handler(int irq, void *arg)
+{
+	struct ifcvf_hw *vf = arg;
+	u8 isr;
+
+	isr = vp_ioread8(vf->isr);
+	if (isr & VIRTIO_PCI_ISR_CONFIG)
+		ifcvf_config_changed(irq, arg);
+
+	return ifcvf_vqs_reused_intr_handler(irq, arg);
+}
+
+static void ifcvf_free_irq_vectors(void *data)
+{
+	pci_free_irq_vectors(data);
+}
+
+static void ifcvf_free_per_vq_irq(struct ifcvf_hw *vf)
+{
+	struct pci_dev *pdev = vf->pdev;
+	int i;
+
+	for (i = 0; i < vf->nr_vring; i++) {
+		if (vf->vring[i].irq != -EINVAL) {
+			devm_free_irq(&pdev->dev, vf->vring[i].irq, &vf->vring[i]);
+			vf->vring[i].irq = -EINVAL;
+		}
+	}
+}
+
+static void ifcvf_free_vqs_reused_irq(struct ifcvf_hw *vf)
+{
+	struct pci_dev *pdev = vf->pdev;
+
+	if (vf->vqs_reused_irq != -EINVAL) {
+		devm_free_irq(&pdev->dev, vf->vqs_reused_irq, vf);
+		vf->vqs_reused_irq = -EINVAL;
+	}
+
+}
+
+static void ifcvf_free_vq_irq(struct ifcvf_hw *vf)
+{
+	if (vf->msix_vector_status == MSIX_VECTOR_PER_VQ_AND_CONFIG)
+		ifcvf_free_per_vq_irq(vf);
+	else
+		ifcvf_free_vqs_reused_irq(vf);
+}
+
+static void ifcvf_free_config_irq(struct ifcvf_hw *vf)
+{
+	struct pci_dev *pdev = vf->pdev;
+
+	if (vf->config_irq == -EINVAL)
+		return;
+
+	/* If the irq is shared by all vqs and the config interrupt,
+	 * it is already freed in ifcvf_free_vq_irq, so here only
+	 * need to free config irq when msix_vector_status != MSIX_VECTOR_DEV_SHARED
+	 */
+	if (vf->msix_vector_status != MSIX_VECTOR_DEV_SHARED) {
+		devm_free_irq(&pdev->dev, vf->config_irq, vf);
+		vf->config_irq = -EINVAL;
+	}
+}
+
+static void ifcvf_free_irq(struct ifcvf_hw *vf)
+{
+	struct pci_dev *pdev = vf->pdev;
+
+	ifcvf_free_vq_irq(vf);
+	ifcvf_free_config_irq(vf);
+	ifcvf_free_irq_vectors(pdev);
+}
+
+/* ifcvf MSIX vectors allocator, this helper tries to allocate
+ * vectors for all virtqueues and the config interrupt.
+ * It returns the number of allocated vectors, negative
+ * return value when fails.
+ */
+static int ifcvf_alloc_vectors(struct ifcvf_hw *vf)
+{
+	struct pci_dev *pdev = vf->pdev;
+	int max_intr, ret;
+
+	/* all queues and config interrupt  */
+	max_intr = vf->nr_vring + 1;
+	ret = pci_alloc_irq_vectors(pdev, 1, max_intr, PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
+
+	if (ret < 0) {
+		IFCVF_ERR(pdev, "Failed to alloc IRQ vectors\n");
+		return ret;
+	}
+
+	if (ret < max_intr)
+		IFCVF_INFO(pdev,
+			   "Requested %u vectors, however only %u allocated, lower performance\n",
+			   max_intr, ret);
+
+	return ret;
+}
+
+static int ifcvf_request_per_vq_irq(struct ifcvf_hw *vf)
+{
+	struct pci_dev *pdev = vf->pdev;
+	int i, vector, ret, irq;
+
+	vf->vqs_reused_irq = -EINVAL;
+	for (i = 0; i < vf->nr_vring; i++) {
+		snprintf(vf->vring[i].msix_name, 256, "ifcvf[%s]-%d\n", pci_name(pdev), i);
+		vector = i;
+		irq = pci_irq_vector(pdev, vector);
+		ret = devm_request_irq(&pdev->dev, irq,
+				       ifcvf_vq_intr_handler, 0,
+				       vf->vring[i].msix_name,
+				       &vf->vring[i]);
+		if (ret) {
+			IFCVF_ERR(pdev, "Failed to request irq for vq %d\n", i);
+			goto err;
+		}
+
+		vf->vring[i].irq = irq;
+		ret = ifcvf_set_vq_vector(vf, i, vector);
+		if (ret == VIRTIO_MSI_NO_VECTOR) {
+			IFCVF_ERR(pdev, "No msix vector for vq %u\n", i);
+			goto err;
+		}
+	}
+
+	return 0;
+err:
+	ifcvf_free_irq(vf);
+
+	return -EFAULT;
+}
+
+static int ifcvf_request_vqs_reused_irq(struct ifcvf_hw *vf)
+{
+	struct pci_dev *pdev = vf->pdev;
+	int i, vector, ret, irq;
+
+	vector = 0;
+	snprintf(vf->vring[0].msix_name, 256, "ifcvf[%s]-vqs-reused-irq\n", pci_name(pdev));
+	irq = pci_irq_vector(pdev, vector);
+	ret = devm_request_irq(&pdev->dev, irq,
+			       ifcvf_vqs_reused_intr_handler, 0,
+			       vf->vring[0].msix_name, vf);
+	if (ret) {
+		IFCVF_ERR(pdev, "Failed to request reused irq for the device\n");
+		goto err;
+	}
+
+	vf->vqs_reused_irq = irq;
+	for (i = 0; i < vf->nr_vring; i++) {
+		vf->vring[i].irq = -EINVAL;
+		ret = ifcvf_set_vq_vector(vf, i, vector);
+		if (ret == VIRTIO_MSI_NO_VECTOR) {
+			IFCVF_ERR(pdev, "No msix vector for vq %u\n", i);
+			goto err;
+		}
+	}
+
+	return 0;
+err:
+	ifcvf_free_irq(vf);
+
+	return -EFAULT;
+}
+
+static int ifcvf_request_dev_irq(struct ifcvf_hw *vf)
+{
+	struct pci_dev *pdev = vf->pdev;
+	int i, vector, ret, irq;
+
+	vector = 0;
+	snprintf(vf->vring[0].msix_name, 256, "ifcvf[%s]-dev-irq\n", pci_name(pdev));
+	irq = pci_irq_vector(pdev, vector);
+	ret = devm_request_irq(&pdev->dev, irq,
+			       ifcvf_dev_intr_handler, 0,
+			       vf->vring[0].msix_name, vf);
+	if (ret) {
+		IFCVF_ERR(pdev, "Failed to request irq for the device\n");
+		goto err;
+	}
+
+	vf->vqs_reused_irq = irq;
+	for (i = 0; i < vf->nr_vring; i++) {
+		vf->vring[i].irq = -EINVAL;
+		ret = ifcvf_set_vq_vector(vf, i, vector);
+		if (ret == VIRTIO_MSI_NO_VECTOR) {
+			IFCVF_ERR(pdev, "No msix vector for vq %u\n", i);
+			goto err;
+		}
+	}
+
+	vf->config_irq = irq;
+	ret = ifcvf_set_config_vector(vf, vector);
+	if (ret == VIRTIO_MSI_NO_VECTOR) {
+		IFCVF_ERR(pdev, "No msix vector for device config\n");
+		goto err;
+	}
+
+	return 0;
+err:
+	ifcvf_free_irq(vf);
+
+	return -EFAULT;
+
+}
+
+static int ifcvf_request_vq_irq(struct ifcvf_hw *vf)
+{
+	int ret;
+
+	if (vf->msix_vector_status == MSIX_VECTOR_PER_VQ_AND_CONFIG)
+		ret = ifcvf_request_per_vq_irq(vf);
+	else
+		ret = ifcvf_request_vqs_reused_irq(vf);
+
+	return ret;
+}
+
+static int ifcvf_request_config_irq(struct ifcvf_hw *vf)
+{
+	struct pci_dev *pdev = vf->pdev;
+	int config_vector, ret;
+
+	if (vf->msix_vector_status == MSIX_VECTOR_PER_VQ_AND_CONFIG)
+		config_vector = vf->nr_vring;
+	else if (vf->msix_vector_status ==  MSIX_VECTOR_SHARED_VQ_AND_CONFIG)
+		/* vector 0 for vqs and 1 for config interrupt */
+		config_vector = 1;
+	else if (vf->msix_vector_status == MSIX_VECTOR_DEV_SHARED)
+		/* re-use the vqs vector */
+		return 0;
+	else
+		return -EINVAL;
+
+	snprintf(vf->config_msix_name, 256, "ifcvf[%s]-config\n",
+		 pci_name(pdev));
+	vf->config_irq = pci_irq_vector(pdev, config_vector);
+	ret = devm_request_irq(&pdev->dev, vf->config_irq,
+			       ifcvf_config_changed, 0,
+			       vf->config_msix_name, vf);
+	if (ret) {
+		IFCVF_ERR(pdev, "Failed to request config irq\n");
+		goto err;
+	}
+
+	ret = ifcvf_set_config_vector(vf, config_vector);
+	if (ret == VIRTIO_MSI_NO_VECTOR) {
+		IFCVF_ERR(pdev, "No msix vector for device config\n");
+		goto err;
+	}
+
+	return 0;
+err:
+	ifcvf_free_irq(vf);
+
+	return -EFAULT;
+}
+
+static int ifcvf_request_irq(struct ifcvf_hw *vf)
+{
+	int nvectors, ret, max_intr;
+
+	nvectors = ifcvf_alloc_vectors(vf);
+	if (nvectors <= 0)
+		return -EFAULT;
+
+	vf->msix_vector_status = MSIX_VECTOR_PER_VQ_AND_CONFIG;
+	max_intr = vf->nr_vring + 1;
+	if (nvectors < max_intr)
+		vf->msix_vector_status = MSIX_VECTOR_SHARED_VQ_AND_CONFIG;
+
+	if (nvectors == 1) {
+		vf->msix_vector_status = MSIX_VECTOR_DEV_SHARED;
+		ret = ifcvf_request_dev_irq(vf);
+
+		return ret;
+	}
+
+	ret = ifcvf_request_vq_irq(vf);
+	if (ret)
+		return ret;
+
+	ret = ifcvf_request_config_irq(vf);
+
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int ifcvf_start_datapath(void *private)
+{
+	struct ifcvf_hw *vf = ifcvf_private_to_vf(private);
+	u8 status;
+	int ret;
+
+	ret = ifcvf_start_hw(vf);
+	if (ret < 0) {
+		status = ifcvf_get_status(vf);
+		status |= VIRTIO_CONFIG_S_FAILED;
+		ifcvf_set_status(vf, status);
+	}
+
+	return ret;
+}
+
+static int ifcvf_stop_datapath(void *private)
+{
+	struct ifcvf_hw *vf = ifcvf_private_to_vf(private);
+	int i;
+
+	for (i = 0; i < vf->nr_vring; i++)
+		vf->vring[i].cb.callback = NULL;
+
+	ifcvf_stop_hw(vf);
+
+	return 0;
+}
+
+static void ifcvf_reset_vring(struct ifcvf_adapter *adapter)
+{
+	struct ifcvf_hw *vf = ifcvf_private_to_vf(adapter);
+	int i;
+
+	for (i = 0; i < vf->nr_vring; i++) {
+		vf->vring[i].last_avail_idx = 0;
+		vf->vring[i].desc = 0;
+		vf->vring[i].avail = 0;
+		vf->vring[i].used = 0;
+		vf->vring[i].ready = 0;
+		vf->vring[i].cb.callback = NULL;
+		vf->vring[i].cb.private = NULL;
+	}
+
+	ifcvf_reset(vf);
+}
+
+static struct ifcvf_adapter *vdpa_to_adapter(struct vdpa_device *vdpa_dev)
+{
+	return container_of(vdpa_dev, struct ifcvf_adapter, vdpa);
+}
+
+static struct ifcvf_hw *vdpa_to_vf(struct vdpa_device *vdpa_dev)
+{
+	struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
+
+	return adapter->vf;
+}
+
+static u64 ifcvf_vdpa_get_device_features(struct vdpa_device *vdpa_dev)
+{
+	struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+	struct pci_dev *pdev = adapter->pdev;
+	u32 type = vf->dev_type;
+	u64 features;
+
+	if (type == VIRTIO_ID_NET || type == VIRTIO_ID_BLOCK)
+		features = ifcvf_get_features(vf);
+	else {
+		features = 0;
+		IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", vf->dev_type);
+	}
+
+	return features;
+}
+
+static int ifcvf_vdpa_set_driver_features(struct vdpa_device *vdpa_dev, u64 features)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+	int ret;
+
+	ret = ifcvf_verify_min_features(vf, features);
+	if (ret)
+		return ret;
+
+	vf->req_features = features;
+
+	return 0;
+}
+
+static u64 ifcvf_vdpa_get_driver_features(struct vdpa_device *vdpa_dev)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	return vf->req_features;
+}
+
+static u8 ifcvf_vdpa_get_status(struct vdpa_device *vdpa_dev)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	return ifcvf_get_status(vf);
+}
+
+static void ifcvf_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
+{
+	struct ifcvf_adapter *adapter;
+	struct ifcvf_hw *vf;
+	u8 status_old;
+	int ret;
+
+	vf  = vdpa_to_vf(vdpa_dev);
+	adapter = vdpa_to_adapter(vdpa_dev);
+	status_old = ifcvf_get_status(vf);
+
+	if (status_old == status)
+		return;
+
+	if ((status & VIRTIO_CONFIG_S_DRIVER_OK) &&
+	    !(status_old & VIRTIO_CONFIG_S_DRIVER_OK)) {
+		ret = ifcvf_request_irq(vf);
+		if (ret) {
+			status = ifcvf_get_status(vf);
+			status |= VIRTIO_CONFIG_S_FAILED;
+			ifcvf_set_status(vf, status);
+			return;
+		}
+
+		if (ifcvf_start_datapath(adapter) < 0)
+			IFCVF_ERR(adapter->pdev,
+				  "Failed to set ifcvf vdpa  status %u\n",
+				  status);
+	}
+
+	ifcvf_set_status(vf, status);
+}
+
+static int ifcvf_vdpa_reset(struct vdpa_device *vdpa_dev)
+{
+	struct ifcvf_adapter *adapter;
+	struct ifcvf_hw *vf;
+	u8 status_old;
+
+	vf  = vdpa_to_vf(vdpa_dev);
+	adapter = vdpa_to_adapter(vdpa_dev);
+	status_old = ifcvf_get_status(vf);
+
+	if (status_old == 0)
+		return 0;
+
+	if (status_old & VIRTIO_CONFIG_S_DRIVER_OK) {
+		ifcvf_stop_datapath(adapter);
+		ifcvf_free_irq(vf);
+	}
+
+	ifcvf_reset_vring(adapter);
+
+	return 0;
+}
+
+static u16 ifcvf_vdpa_get_vq_num_max(struct vdpa_device *vdpa_dev)
+{
+	return IFCVF_QUEUE_MAX;
+}
+
+static int ifcvf_vdpa_get_vq_state(struct vdpa_device *vdpa_dev, u16 qid,
+				   struct vdpa_vq_state *state)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	state->split.avail_index = ifcvf_get_vq_state(vf, qid);
+	return 0;
+}
+
+static int ifcvf_vdpa_set_vq_state(struct vdpa_device *vdpa_dev, u16 qid,
+				   const struct vdpa_vq_state *state)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	return ifcvf_set_vq_state(vf, qid, state->split.avail_index);
+}
+
+static void ifcvf_vdpa_set_vq_cb(struct vdpa_device *vdpa_dev, u16 qid,
+				 struct vdpa_callback *cb)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	vf->vring[qid].cb = *cb;
+}
+
+static void ifcvf_vdpa_set_vq_ready(struct vdpa_device *vdpa_dev,
+				    u16 qid, bool ready)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	vf->vring[qid].ready = ready;
+}
+
+static bool ifcvf_vdpa_get_vq_ready(struct vdpa_device *vdpa_dev, u16 qid)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	return vf->vring[qid].ready;
+}
+
+static void ifcvf_vdpa_set_vq_num(struct vdpa_device *vdpa_dev, u16 qid,
+				  u32 num)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	vf->vring[qid].size = num;
+}
+
+static int ifcvf_vdpa_set_vq_address(struct vdpa_device *vdpa_dev, u16 qid,
+				     u64 desc_area, u64 driver_area,
+				     u64 device_area)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	vf->vring[qid].desc = desc_area;
+	vf->vring[qid].avail = driver_area;
+	vf->vring[qid].used = device_area;
+
+	return 0;
+}
+
+static void ifcvf_vdpa_kick_vq(struct vdpa_device *vdpa_dev, u16 qid)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	ifcvf_notify_queue(vf, qid);
+}
+
+static u32 ifcvf_vdpa_get_generation(struct vdpa_device *vdpa_dev)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	return vp_ioread8(&vf->common_cfg->config_generation);
+}
+
+static u32 ifcvf_vdpa_get_device_id(struct vdpa_device *vdpa_dev)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	return vf->dev_type;
+}
+
+static u32 ifcvf_vdpa_get_vendor_id(struct vdpa_device *vdpa_dev)
+{
+	struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
+	struct pci_dev *pdev = adapter->pdev;
+
+	return pdev->subsystem_vendor;
+}
+
+static u32 ifcvf_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
+{
+	return IFCVF_QUEUE_ALIGNMENT;
+}
+
+static size_t ifcvf_vdpa_get_config_size(struct vdpa_device *vdpa_dev)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	return  vf->config_size;
+}
+
+static u32 ifcvf_vdpa_get_vq_group(struct vdpa_device *vdpa, u16 idx)
+{
+	return 0;
+}
+
+static void ifcvf_vdpa_get_config(struct vdpa_device *vdpa_dev,
+				  unsigned int offset,
+				  void *buf, unsigned int len)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	ifcvf_read_dev_config(vf, offset, buf, len);
+}
+
+static void ifcvf_vdpa_set_config(struct vdpa_device *vdpa_dev,
+				  unsigned int offset, const void *buf,
+				  unsigned int len)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	ifcvf_write_dev_config(vf, offset, buf, len);
+}
+
+static void ifcvf_vdpa_set_config_cb(struct vdpa_device *vdpa_dev,
+				     struct vdpa_callback *cb)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	vf->config_cb.callback = cb->callback;
+	vf->config_cb.private = cb->private;
+}
+
+static int ifcvf_vdpa_get_vq_irq(struct vdpa_device *vdpa_dev,
+				 u16 qid)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	if (vf->vqs_reused_irq < 0)
+		return vf->vring[qid].irq;
+	else
+		return -EINVAL;
+}
+
+static struct vdpa_notification_area ifcvf_get_vq_notification(struct vdpa_device *vdpa_dev,
+							       u16 idx)
+{
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+	struct vdpa_notification_area area;
+
+	area.addr = vf->vring[idx].notify_pa;
+	if (!vf->notify_off_multiplier)
+		area.size = PAGE_SIZE;
+	else
+		area.size = vf->notify_off_multiplier;
+
+	return area;
+}
+
+/*
+ * IFCVF currently doesn't have on-chip IOMMU, so not
+ * implemented set_map()/dma_map()/dma_unmap()
+ */
+static const struct vdpa_config_ops ifc_vdpa_ops = {
+	.get_device_features = ifcvf_vdpa_get_device_features,
+	.set_driver_features = ifcvf_vdpa_set_driver_features,
+	.get_driver_features = ifcvf_vdpa_get_driver_features,
+	.get_status	= ifcvf_vdpa_get_status,
+	.set_status	= ifcvf_vdpa_set_status,
+	.reset		= ifcvf_vdpa_reset,
+	.get_vq_num_max	= ifcvf_vdpa_get_vq_num_max,
+	.get_vq_state	= ifcvf_vdpa_get_vq_state,
+	.set_vq_state	= ifcvf_vdpa_set_vq_state,
+	.set_vq_cb	= ifcvf_vdpa_set_vq_cb,
+	.set_vq_ready	= ifcvf_vdpa_set_vq_ready,
+	.get_vq_ready	= ifcvf_vdpa_get_vq_ready,
+	.set_vq_num	= ifcvf_vdpa_set_vq_num,
+	.set_vq_address	= ifcvf_vdpa_set_vq_address,
+	.get_vq_irq	= ifcvf_vdpa_get_vq_irq,
+	.kick_vq	= ifcvf_vdpa_kick_vq,
+	.get_generation	= ifcvf_vdpa_get_generation,
+	.get_device_id	= ifcvf_vdpa_get_device_id,
+	.get_vendor_id	= ifcvf_vdpa_get_vendor_id,
+	.get_vq_align	= ifcvf_vdpa_get_vq_align,
+	.get_vq_group	= ifcvf_vdpa_get_vq_group,
+	.get_config_size	= ifcvf_vdpa_get_config_size,
+	.get_config	= ifcvf_vdpa_get_config,
+	.set_config	= ifcvf_vdpa_set_config,
+	.set_config_cb  = ifcvf_vdpa_set_config_cb,
+	.get_vq_notification = ifcvf_get_vq_notification,
+};
+
+static struct virtio_device_id id_table_net[] = {
+	{VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID},
+	{0},
+};
+
+static struct virtio_device_id id_table_blk[] = {
+	{VIRTIO_ID_BLOCK, VIRTIO_DEV_ANY_ID},
+	{0},
+};
+
+static u32 get_dev_type(struct pci_dev *pdev)
+{
+	u32 dev_type;
+
+	/* This drirver drives both modern virtio devices and transitional
+	 * devices in modern mode.
+	 * vDPA requires feature bit VIRTIO_F_ACCESS_PLATFORM,
+	 * so legacy devices and transitional devices in legacy
+	 * mode will not work for vDPA, this driver will not
+	 * drive devices with legacy interface.
+	 */
+
+	if (pdev->device < 0x1040)
+		dev_type =  pdev->subsystem_device;
+	else
+		dev_type =  pdev->device - 0x1040;
+
+	return dev_type;
+}
+
+static int ifcvf_vdpa_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
+			      const struct vdpa_dev_set_config *config)
+{
+	struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
+	struct ifcvf_adapter *adapter;
+	struct vdpa_device *vdpa_dev;
+	struct pci_dev *pdev;
+	struct ifcvf_hw *vf;
+	int ret;
+
+	ifcvf_mgmt_dev = container_of(mdev, struct ifcvf_vdpa_mgmt_dev, mdev);
+	vf = &ifcvf_mgmt_dev->vf;
+	pdev = vf->pdev;
+	adapter = vdpa_alloc_device(struct ifcvf_adapter, vdpa,
+				    &pdev->dev, &ifc_vdpa_ops, 1, 1, NULL, false);
+	if (IS_ERR(adapter)) {
+		IFCVF_ERR(pdev, "Failed to allocate vDPA structure");
+		return PTR_ERR(adapter);
+	}
+
+	ifcvf_mgmt_dev->adapter = adapter;
+	adapter->pdev = pdev;
+	adapter->vdpa.dma_dev = &pdev->dev;
+	adapter->vdpa.mdev = mdev;
+	adapter->vf = vf;
+	vdpa_dev = &adapter->vdpa;
+
+	if (name)
+		ret = dev_set_name(&vdpa_dev->dev, "%s", name);
+	else
+		ret = dev_set_name(&vdpa_dev->dev, "vdpa%u", vdpa_dev->index);
+
+	ret = _vdpa_register_device(&adapter->vdpa, vf->nr_vring);
+	if (ret) {
+		put_device(&adapter->vdpa.dev);
+		IFCVF_ERR(pdev, "Failed to register to vDPA bus");
+		return ret;
+	}
+
+	return 0;
+}
+
+static void ifcvf_vdpa_dev_del(struct vdpa_mgmt_dev *mdev, struct vdpa_device *dev)
+{
+	struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
+
+	ifcvf_mgmt_dev = container_of(mdev, struct ifcvf_vdpa_mgmt_dev, mdev);
+	_vdpa_unregister_device(dev);
+	ifcvf_mgmt_dev->adapter = NULL;
+}
+
+static const struct vdpa_mgmtdev_ops ifcvf_vdpa_mgmt_dev_ops = {
+	.dev_add = ifcvf_vdpa_dev_add,
+	.dev_del = ifcvf_vdpa_dev_del
+};
+
+static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
+	struct device *dev = &pdev->dev;
+	struct ifcvf_hw *vf;
+	u32 dev_type;
+	int ret, i;
+
+	ret = pcim_enable_device(pdev);
+	if (ret) {
+		IFCVF_ERR(pdev, "Failed to enable device\n");
+		return ret;
+	}
+	ret = pcim_iomap_regions(pdev, BIT(0) | BIT(2) | BIT(4),
+				 IFCVF_DRIVER_NAME);
+	if (ret) {
+		IFCVF_ERR(pdev, "Failed to request MMIO region\n");
+		return ret;
+	}
+
+	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
+	if (ret) {
+		IFCVF_ERR(pdev, "No usable DMA configuration\n");
+		return ret;
+	}
+
+	ret = devm_add_action_or_reset(dev, ifcvf_free_irq_vectors, pdev);
+	if (ret) {
+		IFCVF_ERR(pdev,
+			  "Failed for adding devres for freeing irq vectors\n");
+		return ret;
+	}
+
+	pci_set_master(pdev);
+	ifcvf_mgmt_dev = kzalloc(sizeof(struct ifcvf_vdpa_mgmt_dev), GFP_KERNEL);
+	if (!ifcvf_mgmt_dev) {
+		IFCVF_ERR(pdev, "Failed to alloc memory for the vDPA management device\n");
+		return -ENOMEM;
+	}
+
+	vf = &ifcvf_mgmt_dev->vf;
+	vf->dev_type = get_dev_type(pdev);
+	vf->base = pcim_iomap_table(pdev);
+	vf->pdev = pdev;
+
+	ret = ifcvf_init_hw(vf, pdev);
+	if (ret) {
+		IFCVF_ERR(pdev, "Failed to init IFCVF hw\n");
+		goto err;
+	}
+
+	for (i = 0; i < vf->nr_vring; i++)
+		vf->vring[i].irq = -EINVAL;
+
+	vf->hw_features = ifcvf_get_hw_features(vf);
+	vf->config_size = ifcvf_get_config_size(vf);
+
+	dev_type = get_dev_type(pdev);
+	switch (dev_type) {
+	case VIRTIO_ID_NET:
+		ifcvf_mgmt_dev->mdev.id_table = id_table_net;
+		break;
+	case VIRTIO_ID_BLOCK:
+		ifcvf_mgmt_dev->mdev.id_table = id_table_blk;
+		break;
+	default:
+		IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", dev_type);
+		ret = -EOPNOTSUPP;
+		goto err;
+	}
+
+	ifcvf_mgmt_dev->mdev.ops = &ifcvf_vdpa_mgmt_dev_ops;
+	ifcvf_mgmt_dev->mdev.device = dev;
+	ifcvf_mgmt_dev->mdev.max_supported_vqs = vf->nr_vring;
+	ifcvf_mgmt_dev->mdev.supported_features = vf->hw_features;
+
+	ret = vdpa_mgmtdev_register(&ifcvf_mgmt_dev->mdev);
+	if (ret) {
+		IFCVF_ERR(pdev,
+			  "Failed to initialize the management interfaces\n");
+		goto err;
+	}
+
+	pci_set_drvdata(pdev, ifcvf_mgmt_dev);
+
+	return 0;
+
+err:
+	kfree(ifcvf_mgmt_dev);
+	return ret;
+}
+
+static void ifcvf_remove(struct pci_dev *pdev)
+{
+	struct ifcvf_vdpa_mgmt_dev *ifcvf_mgmt_dev;
+
+	ifcvf_mgmt_dev = pci_get_drvdata(pdev);
+	vdpa_mgmtdev_unregister(&ifcvf_mgmt_dev->mdev);
+	kfree(ifcvf_mgmt_dev);
+}
+
+static struct pci_device_id ifcvf_pci_ids[] = {
+	/* N3000 network device */
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_REDHAT_QUMRANET,
+			 N3000_DEVICE_ID,
+			 PCI_VENDOR_ID_INTEL,
+			 N3000_SUBSYS_DEVICE_ID) },
+	/* C5000X-PL network device */
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_REDHAT_QUMRANET,
+			 VIRTIO_TRANS_ID_NET,
+			 PCI_VENDOR_ID_INTEL,
+			 VIRTIO_ID_NET) },
+	/* C5000X-PL block device */
+	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_REDHAT_QUMRANET,
+			 VIRTIO_TRANS_ID_BLOCK,
+			 PCI_VENDOR_ID_INTEL,
+			 VIRTIO_ID_BLOCK) },
+
+	{ 0 },
+};
+MODULE_DEVICE_TABLE(pci, ifcvf_pci_ids);
+
+static struct pci_driver ifcvf_driver = {
+	.name     = IFCVF_DRIVER_NAME,
+	.id_table = ifcvf_pci_ids,
+	.probe    = ifcvf_probe,
+	.remove   = ifcvf_remove,
+};
+
+module_pci_driver(ifcvf_driver);
+
+MODULE_LICENSE("GPL v2");