Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

Pull virtio updates from Michael Tsirkin:

 - resume support in vdpa/solidrun

 - structure size optimizations in virtio_pci

 - new pds_vdpa driver

 - immediate initialization mechanism for vdpa/ifcvf

 - interrupt bypass for vdpa/mlx5

 - multiple worker support for vhost

 - viirtio net in Intel F2000X-PL support for vdpa/ifcvf

 - fixes, cleanups all over the place

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (48 commits)
  vhost: Make parameter name match of vhost_get_vq_desc()
  vduse: fix NULL pointer dereference
  vhost: Allow worker switching while work is queueing
  vhost_scsi: add support for worker ioctls
  vhost: allow userspace to create workers
  vhost: replace single worker pointer with xarray
  vhost: add helper to parse userspace vring state/file
  vhost: remove vhost_work_queue
  vhost_scsi: flush IO vqs then send TMF rsp
  vhost_scsi: convert to vhost_vq_work_queue
  vhost_scsi: make SCSI cmd completion per vq
  vhost_sock: convert to vhost_vq_work_queue
  vhost: convert poll work to be vq based
  vhost: take worker or vq for flushing
  vhost: take worker or vq instead of dev for queueing
  vhost, vhost_net: add helper to check if vq has work
  vhost: add vhost_worker pointer to vhost_virtqueue
  vhost: dynamically allocate vhost_worker
  vhost: create worker at end of vhost_dev_set_owner
  virtio_bt: call scheduler when we free unused buffs
  ...

21 files changed, 1880 insertions, 201 deletions

diff --git a/drivers/vdpa/Kconfig b/drivers/vdpa/Kconfig
index cd6ad92f3f0598..656c1cb541deb7 100644
--- a/drivers/vdpa/Kconfig
+++ b/drivers/vdpa/Kconfig
@@ -116,4 +116,14 @@ config ALIBABA_ENI_VDPA
 	  This driver includes a HW monitor device that
 	  reads health values from the DPU.
 
+config PDS_VDPA
+	tristate "vDPA driver for AMD/Pensando DSC devices"
+	select VIRTIO_PCI_LIB
+	depends on PCI_MSI
+	depends on PDS_CORE
+	help
+	  vDPA network driver for AMD/Pensando's PDS Core devices.
+	  With this driver, the VirtIO dataplane can be
+	  offloaded to an AMD/Pensando DSC device.
+
 endif # VDPA
diff --git a/drivers/vdpa/Makefile b/drivers/vdpa/Makefile
index 59396ff2a31828..8f53c6f3cca7c5 100644
--- a/drivers/vdpa/Makefile
+++ b/drivers/vdpa/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_MLX5_VDPA) += mlx5/
 obj-$(CONFIG_VP_VDPA)    += virtio_pci/
 obj-$(CONFIG_ALIBABA_ENI_VDPA) += alibaba/
 obj-$(CONFIG_SNET_VDPA) += solidrun/
+obj-$(CONFIG_PDS_VDPA) += pds/
diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c
index 5563b3a773c7bd..060f837a4f9f76 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.c
+++ b/drivers/vdpa/ifcvf/ifcvf_base.c
@@ -69,6 +69,37 @@ static int ifcvf_read_config_range(struct pci_dev *dev,
 	return 0;
 }
 
+static u16 ifcvf_get_vq_size(struct ifcvf_hw *hw, u16 qid)
+{
+	u16 queue_size;
+
+	vp_iowrite16(qid, &hw->common_cfg->queue_select);
+	queue_size = vp_ioread16(&hw->common_cfg->queue_size);
+
+	return queue_size;
+}
+
+/* This function returns the max allowed safe size for
+ * all virtqueues. It is the minimal size that can be
+ * suppprted by all virtqueues.
+ */
+u16 ifcvf_get_max_vq_size(struct ifcvf_hw *hw)
+{
+	u16 queue_size, max_size, qid;
+
+	max_size = ifcvf_get_vq_size(hw, 0);
+	for (qid = 1; qid < hw->nr_vring; qid++) {
+		queue_size = ifcvf_get_vq_size(hw, qid);
+		/* 0 means the queue is unavailable */
+		if (!queue_size)
+			continue;
+
+		max_size = min(queue_size, max_size);
+	}
+
+	return max_size;
+}
+
 int ifcvf_init_hw(struct ifcvf_hw *hw, struct pci_dev *pdev)
 {
 	struct virtio_pci_cap cap;
@@ -134,6 +165,9 @@ next:
 	}
 
 	hw->nr_vring = vp_ioread16(&hw->common_cfg->num_queues);
+	hw->vring = kzalloc(sizeof(struct vring_info) * hw->nr_vring, GFP_KERNEL);
+	if (!hw->vring)
+		return -ENOMEM;
 
 	for (i = 0; i < hw->nr_vring; i++) {
 		vp_iowrite16(i, &hw->common_cfg->queue_select);
@@ -170,21 +204,9 @@ void ifcvf_set_status(struct ifcvf_hw *hw, u8 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);
+	while (ifcvf_get_status(hw))
+		msleep(1);
 }
 
 u64 ifcvf_get_hw_features(struct ifcvf_hw *hw)
@@ -204,11 +226,29 @@ u64 ifcvf_get_hw_features(struct ifcvf_hw *hw)
 	return features;
 }
 
-u64 ifcvf_get_features(struct ifcvf_hw *hw)
+/* return provisioned vDPA dev features */
+u64 ifcvf_get_dev_features(struct ifcvf_hw *hw)
 {
 	return hw->dev_features;
 }
 
+u64 ifcvf_get_driver_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->guest_feature);
+
+	vp_iowrite32(1, &cfg->device_feature_select);
+	features_hi = vp_ioread32(&cfg->guest_feature);
+
+	features = ((u64)features_hi << 32) | features_lo;
+
+	return features;
+}
+
 int ifcvf_verify_min_features(struct ifcvf_hw *hw, u64 features)
 {
 	if (!(features & BIT_ULL(VIRTIO_F_ACCESS_PLATFORM)) && features) {
@@ -275,7 +315,7 @@ void ifcvf_write_dev_config(struct ifcvf_hw *hw, u64 offset,
 		vp_iowrite8(*p++, hw->dev_cfg + offset + i);
 }
 
-static void ifcvf_set_features(struct ifcvf_hw *hw, u64 features)
+void ifcvf_set_driver_features(struct ifcvf_hw *hw, u64 features)
 {
 	struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg;
 
@@ -286,105 +326,104 @@ static void ifcvf_set_features(struct ifcvf_hw *hw, u64 features)
 	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;
+	struct ifcvf_lm_cfg  __iomem *lm_cfg = hw->lm_cfg;
 	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);
+	last_avail_idx = vp_ioread16(&lm_cfg->vq_state_region + qid * 2);
 
 	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;
+	struct ifcvf_lm_cfg  __iomem *lm_cfg = hw->lm_cfg;
 
-	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);
+	vp_iowrite16(num, &lm_cfg->vq_state_region + qid * 2);
 
 	return 0;
 }
 
-static int ifcvf_hw_enable(struct ifcvf_hw *hw)
+void ifcvf_set_vq_num(struct ifcvf_hw *hw, u16 qid, u32 num)
 {
-	struct virtio_pci_common_cfg __iomem *cfg;
-	u32 i;
+	struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg;
 
-	cfg = hw->common_cfg;
-	for (i = 0; i < hw->nr_vring; i++) {
-		if (!hw->vring[i].ready)
-			break;
+	vp_iowrite16(qid, &cfg->queue_select);
+	vp_iowrite16(num, &cfg->queue_size);
+}
 
-		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);
-	}
+int ifcvf_set_vq_address(struct ifcvf_hw *hw, u16 qid, u64 desc_area,
+			 u64 driver_area, u64 device_area)
+{
+	struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg;
+
+	vp_iowrite16(qid, &cfg->queue_select);
+	vp_iowrite64_twopart(desc_area, &cfg->queue_desc_lo,
+			     &cfg->queue_desc_hi);
+	vp_iowrite64_twopart(driver_area, &cfg->queue_avail_lo,
+			     &cfg->queue_avail_hi);
+	vp_iowrite64_twopart(device_area, &cfg->queue_used_lo,
+			     &cfg->queue_used_hi);
 
 	return 0;
 }
 
-static void ifcvf_hw_disable(struct ifcvf_hw *hw)
+bool ifcvf_get_vq_ready(struct ifcvf_hw *hw, u16 qid)
 {
-	u32 i;
+	struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg;
+	u16 queue_enable;
 
-	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);
-	}
+	vp_iowrite16(qid, &cfg->queue_select);
+	queue_enable = vp_ioread16(&cfg->queue_enable);
+
+	return (bool)queue_enable;
 }
 
-int ifcvf_start_hw(struct ifcvf_hw *hw)
+void ifcvf_set_vq_ready(struct ifcvf_hw *hw, u16 qid, bool ready)
 {
-	ifcvf_reset(hw);
-	ifcvf_add_status(hw, VIRTIO_CONFIG_S_ACKNOWLEDGE);
-	ifcvf_add_status(hw, VIRTIO_CONFIG_S_DRIVER);
+	struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg;
 
-	if (ifcvf_config_features(hw) < 0)
-		return -EINVAL;
+	vp_iowrite16(qid, &cfg->queue_select);
+	vp_iowrite16(ready, &cfg->queue_enable);
+}
 
-	if (ifcvf_hw_enable(hw) < 0)
-		return -EINVAL;
+static void ifcvf_reset_vring(struct ifcvf_hw *hw)
+{
+	u16 qid;
 
-	ifcvf_add_status(hw, VIRTIO_CONFIG_S_DRIVER_OK);
+	for (qid = 0; qid < hw->nr_vring; qid++) {
+		hw->vring[qid].cb.callback = NULL;
+		hw->vring[qid].cb.private = NULL;
+		ifcvf_set_vq_vector(hw, qid, VIRTIO_MSI_NO_VECTOR);
+	}
+}
 
-	return 0;
+static void ifcvf_reset_config_handler(struct ifcvf_hw *hw)
+{
+	hw->config_cb.callback = NULL;
+	hw->config_cb.private = NULL;
+	ifcvf_set_config_vector(hw, VIRTIO_MSI_NO_VECTOR);
+}
+
+static void ifcvf_synchronize_irq(struct ifcvf_hw *hw)
+{
+	u32 nvectors = hw->num_msix_vectors;
+	struct pci_dev *pdev = hw->pdev;
+	int i, irq;
+
+	for (i = 0; i < nvectors; i++) {
+		irq = pci_irq_vector(pdev, i);
+		if (irq >= 0)
+			synchronize_irq(irq);
+	}
 }
 
-void ifcvf_stop_hw(struct ifcvf_hw *hw)
+void ifcvf_stop(struct ifcvf_hw *hw)
 {
-	ifcvf_hw_disable(hw);
-	ifcvf_reset(hw);
+	ifcvf_synchronize_irq(hw);
+	ifcvf_reset_vring(hw);
+	ifcvf_reset_config_handler(hw);
 }
 
 void ifcvf_notify_queue(struct ifcvf_hw *hw, u16 qid)
diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
index c20d1c40214e06..b57849c643f611 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.h
+++ b/drivers/vdpa/ifcvf/ifcvf_base.h
@@ -24,15 +24,9 @@
 #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__)
@@ -47,12 +41,7 @@
 #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;
@@ -60,10 +49,18 @@ struct vring_info {
 	char msix_name[256];
 };
 
+struct ifcvf_lm_cfg {
+	__le64 control;
+	__le64 status;
+	__le64 lm_mem_log_start_addr;
+	__le64 lm_mem_log_end_addr;
+	__le16 vq_state_region;
+};
+
 struct ifcvf_hw {
 	u8 __iomem *isr;
 	/* Live migration */
-	u8 __iomem *lm_cfg;
+	struct ifcvf_lm_cfg  __iomem *lm_cfg;
 	/* Notification bar number */
 	u8 notify_bar;
 	u8 msix_vector_status;
@@ -74,13 +71,12 @@ struct ifcvf_hw {
 	phys_addr_t notify_base_pa;
 	u32 notify_off_multiplier;
 	u32 dev_type;
-	u64 req_features;
 	u64 hw_features;
 	/* provisioned device features */
 	u64 dev_features;
 	struct virtio_pci_common_cfg __iomem *common_cfg;
 	void __iomem *dev_cfg;
-	struct vring_info vring[IFCVF_MAX_QUEUES];
+	struct vring_info *vring;
 	void __iomem * const *base;
 	char config_msix_name[256];
 	struct vdpa_callback config_cb;
@@ -88,6 +84,7 @@ struct ifcvf_hw {
 	int vqs_reused_irq;
 	u16 nr_vring;
 	/* VIRTIO_PCI_CAP_DEVICE_CFG size */
+	u32 num_msix_vectors;
 	u32 cap_dev_config_size;
 	struct pci_dev *pdev;
 };
@@ -98,16 +95,6 @@ struct ifcvf_adapter {
 	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;
@@ -116,8 +103,7 @@ struct ifcvf_vdpa_mgmt_dev {
 };
 
 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_stop(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);
@@ -127,7 +113,7 @@ 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_dev_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);
@@ -137,4 +123,12 @@ 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);
+void ifcvf_set_vq_num(struct ifcvf_hw *hw, u16 qid, u32 num);
+int ifcvf_set_vq_address(struct ifcvf_hw *hw, u16 qid, u64 desc_area,
+			 u64 driver_area, u64 device_area);
+bool ifcvf_get_vq_ready(struct ifcvf_hw *hw, u16 qid);
+void ifcvf_set_vq_ready(struct ifcvf_hw *hw, u16 qid, bool ready);
+void ifcvf_set_driver_features(struct ifcvf_hw *hw, u64 features);
+u64 ifcvf_get_driver_features(struct ifcvf_hw *hw);
+u16 ifcvf_get_max_vq_size(struct ifcvf_hw *hw);
 #endif /* _IFCVF_H_ */
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index 7f78c47e40d607..e98fa8100f3cc7 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -125,6 +125,7 @@ static void ifcvf_free_irq(struct ifcvf_hw *vf)
 	ifcvf_free_vq_irq(vf);
 	ifcvf_free_config_irq(vf);
 	ifcvf_free_irq_vectors(pdev);
+	vf->num_msix_vectors = 0;
 }
 
 /* ifcvf MSIX vectors allocator, this helper tries to allocate
@@ -343,56 +344,11 @@ static int ifcvf_request_irq(struct ifcvf_hw *vf)
 	if (ret)
 		return ret;
 
-	return 0;
-}
-
-static int ifcvf_start_datapath(struct ifcvf_adapter *adapter)
-{
-	struct ifcvf_hw *vf = adapter->vf;
-	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(struct ifcvf_adapter *adapter)
-{
-	struct ifcvf_hw *vf = adapter->vf;
-	int i;
-
-	for (i = 0; i < vf->nr_vring; i++)
-		vf->vring[i].cb.callback = NULL;
-
-	ifcvf_stop_hw(vf);
+	vf->num_msix_vectors = nvectors;
 
 	return 0;
 }
 
-static void ifcvf_reset_vring(struct ifcvf_adapter *adapter)
-{
-	struct ifcvf_hw *vf = adapter->vf;
-	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);
@@ -414,7 +370,7 @@ static u64 ifcvf_vdpa_get_device_features(struct vdpa_device *vdpa_dev)
 	u64 features;
 
 	if (type == VIRTIO_ID_NET || type == VIRTIO_ID_BLOCK)
-		features = ifcvf_get_features(vf);
+		features = ifcvf_get_dev_features(vf);
 	else {
 		features = 0;
 		IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", vf->dev_type);
@@ -432,7 +388,7 @@ static int ifcvf_vdpa_set_driver_features(struct vdpa_device *vdpa_dev, u64 feat
 	if (ret)
 		return ret;
 
-	vf->req_features = features;
+	ifcvf_set_driver_features(vf, features);
 
 	return 0;
 }
@@ -440,8 +396,11 @@ static int ifcvf_vdpa_set_driver_features(struct vdpa_device *vdpa_dev, u64 feat
 static u64 ifcvf_vdpa_get_driver_features(struct vdpa_device *vdpa_dev)
 {
 	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+	u64 features;
+
+	features = ifcvf_get_driver_features(vf);
 
-	return vf->req_features;
+	return features;
 }
 
 static u8 ifcvf_vdpa_get_status(struct vdpa_device *vdpa_dev)
@@ -453,13 +412,11 @@ static u8 ifcvf_vdpa_get_status(struct vdpa_device *vdpa_dev)
 
 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)
@@ -469,16 +426,9 @@ static void ifcvf_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
 	    !(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);
+			IFCVF_ERR(vf->pdev, "failed to request irq with error %d\n", ret);
 			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);
@@ -486,30 +436,24 @@ static void ifcvf_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 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);
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+	u8 status = ifcvf_get_status(vf);
 
-	if (status_old == 0)
-		return 0;
+	ifcvf_stop(vf);
 
-	if (status_old & VIRTIO_CONFIG_S_DRIVER_OK) {
-		ifcvf_stop_datapath(adapter);
+	if (status & VIRTIO_CONFIG_S_DRIVER_OK)
 		ifcvf_free_irq(vf);
-	}
 
-	ifcvf_reset_vring(adapter);
+	ifcvf_reset(vf);
 
 	return 0;
 }
 
 static u16 ifcvf_vdpa_get_vq_num_max(struct vdpa_device *vdpa_dev)
 {
-	return IFCVF_QUEUE_MAX;
+	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
+
+	return ifcvf_get_max_vq_size(vf);
 }
 
 static int ifcvf_vdpa_get_vq_state(struct vdpa_device *vdpa_dev, u16 qid,
@@ -542,14 +486,14 @@ static void ifcvf_vdpa_set_vq_ready(struct vdpa_device *vdpa_dev,
 {
 	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 
-	vf->vring[qid].ready = ready;
+	ifcvf_set_vq_ready(vf, qid, 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;
+	return ifcvf_get_vq_ready(vf, qid);
 }
 
 static void ifcvf_vdpa_set_vq_num(struct vdpa_device *vdpa_dev, u16 qid,
@@ -557,7 +501,7 @@ static void ifcvf_vdpa_set_vq_num(struct vdpa_device *vdpa_dev, u16 qid,
 {
 	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
 
-	vf->vring[qid].size = num;
+	ifcvf_set_vq_num(vf, qid, num);
 }
 
 static int ifcvf_vdpa_set_vq_address(struct vdpa_device *vdpa_dev, u16 qid,
@@ -566,11 +510,7 @@ static int ifcvf_vdpa_set_vq_address(struct vdpa_device *vdpa_dev, u16 qid,
 {
 	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;
+	return ifcvf_set_vq_address(vf, qid, desc_area, driver_area, device_area);
 }
 
 static void ifcvf_vdpa_kick_vq(struct vdpa_device *vdpa_dev, u16 qid)
@@ -892,6 +832,7 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	return 0;
 
 err:
+	kfree(ifcvf_mgmt_dev->vf.vring);
 	kfree(ifcvf_mgmt_dev);
 	return ret;
 }
@@ -902,6 +843,7 @@ static void ifcvf_remove(struct pci_dev *pdev)
 
 	ifcvf_mgmt_dev = pci_get_drvdata(pdev);
 	vdpa_mgmtdev_unregister(&ifcvf_mgmt_dev->mdev);
+	kfree(ifcvf_mgmt_dev->vf.vring);
 	kfree(ifcvf_mgmt_dev);
 }
 
@@ -911,7 +853,9 @@ static struct pci_device_id ifcvf_pci_ids[] = {
 			 N3000_DEVICE_ID,
 			 PCI_VENDOR_ID_INTEL,
 			 N3000_SUBSYS_DEVICE_ID) },
-	/* C5000X-PL network device */
+	/* C5000X-PL network device
+	 * F2000X-PL network device
+	 */
 	{ PCI_DEVICE_SUB(PCI_VENDOR_ID_REDHAT_QUMRANET,
 			 VIRTIO_TRANS_ID_NET,
 			 PCI_VENDOR_ID_INTEL,
diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 279ac6a558d29a..9138ef2fb2c853 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -83,6 +83,7 @@ struct mlx5_vq_restore_info {
 	u64 driver_addr;
 	u16 avail_index;
 	u16 used_index;
+	struct msi_map map;
 	bool ready;
 	bool restore;
 };
@@ -118,6 +119,7 @@ struct mlx5_vdpa_virtqueue {
 	u16 avail_idx;
 	u16 used_idx;
 	int fw_state;
+	struct msi_map map;
 
 	/* keep last in the struct */
 	struct mlx5_vq_restore_info ri;
@@ -808,6 +810,13 @@ static bool counters_supported(const struct mlx5_vdpa_dev *mvdev)
 	       BIT_ULL(MLX5_OBJ_TYPE_VIRTIO_Q_COUNTERS);
 }
 
+static bool msix_mode_supported(struct mlx5_vdpa_dev *mvdev)
+{
+	return MLX5_CAP_DEV_VDPA_EMULATION(mvdev->mdev, event_mode) &
+		(1 << MLX5_VIRTIO_Q_EVENT_MODE_MSIX_MODE) &&
+		pci_msix_can_alloc_dyn(mvdev->mdev->pdev);
+}
+
 static int create_virtqueue(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq)
 {
 	int inlen = MLX5_ST_SZ_BYTES(create_virtio_net_q_in);
@@ -849,9 +858,15 @@ static int create_virtqueue(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtque
 	if (vq_is_tx(mvq->index))
 		MLX5_SET(virtio_net_q_object, obj_context, tisn_or_qpn, ndev->res.tisn);
 
-	MLX5_SET(virtio_q, vq_ctx, event_mode, MLX5_VIRTIO_Q_EVENT_MODE_QP_MODE);
+	if (mvq->map.virq) {
+		MLX5_SET(virtio_q, vq_ctx, event_mode, MLX5_VIRTIO_Q_EVENT_MODE_MSIX_MODE);
+		MLX5_SET(virtio_q, vq_ctx, event_qpn_or_msix, mvq->map.index);
+	} else {
+		MLX5_SET(virtio_q, vq_ctx, event_mode, MLX5_VIRTIO_Q_EVENT_MODE_QP_MODE);
+		MLX5_SET(virtio_q, vq_ctx, event_qpn_or_msix, mvq->fwqp.mqp.qpn);
+	}
+
 	MLX5_SET(virtio_q, vq_ctx, queue_index, mvq->index);
-	MLX5_SET(virtio_q, vq_ctx, event_qpn_or_msix, mvq->fwqp.mqp.qpn);
 	MLX5_SET(virtio_q, vq_ctx, queue_size, mvq->num_ent);
 	MLX5_SET(virtio_q, vq_ctx, virtio_version_1_0,
 		 !!(ndev->mvdev.actual_features & BIT_ULL(VIRTIO_F_VERSION_1)));
@@ -1194,6 +1209,56 @@ static void counter_set_dealloc(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_vir
 		mlx5_vdpa_warn(&ndev->mvdev, "dealloc counter set 0x%x\n", mvq->counter_set_id);
 }
 
+static irqreturn_t mlx5_vdpa_int_handler(int irq, void *priv)
+{
+	struct vdpa_callback *cb = priv;
+
+	if (cb->callback)
+		return cb->callback(cb->private);
+
+	return IRQ_HANDLED;
+}
+
+static void alloc_vector(struct mlx5_vdpa_net *ndev,
+			 struct mlx5_vdpa_virtqueue *mvq)
+{
+	struct mlx5_vdpa_irq_pool *irqp = &ndev->irqp;
+	struct mlx5_vdpa_irq_pool_entry *ent;
+	int err;
+	int i;
+
+	for (i = 0; i < irqp->num_ent; i++) {
+		ent = &irqp->entries[i];
+		if (!ent->used) {
+			snprintf(ent->name, MLX5_VDPA_IRQ_NAME_LEN, "%s-vq-%d",
+				 dev_name(&ndev->mvdev.vdev.dev), mvq->index);
+			ent->dev_id = &ndev->event_cbs[mvq->index];
+			err = request_irq(ent->map.virq, mlx5_vdpa_int_handler, 0,
+					  ent->name, ent->dev_id);
+			if (err)
+				return;
+
+			ent->used = true;
+			mvq->map = ent->map;
+			return;
+		}
+	}
+}
+
+static void dealloc_vector(struct mlx5_vdpa_net *ndev,
+			   struct mlx5_vdpa_virtqueue *mvq)
+{
+	struct mlx5_vdpa_irq_pool *irqp = &ndev->irqp;
+	int i;
+
+	for (i = 0; i < irqp->num_ent; i++)
+		if (mvq->map.virq == irqp->entries[i].map.virq) {
+			free_irq(mvq->map.virq, irqp->entries[i].dev_id);
+			irqp->entries[i].used = false;
+			return;
+		}
+}
+
 static int setup_vq(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq)
 {
 	u16 idx = mvq->index;
@@ -1223,27 +1288,31 @@ static int setup_vq(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq)
 
 	err = counter_set_alloc(ndev, mvq);
 	if (err)
-		goto err_counter;
+		goto err_connect;
 
+	alloc_vector(ndev, mvq);
 	err = create_virtqueue(ndev, mvq);
 	if (err)
-		goto err_connect;
+		goto err_vq;
 
 	if (mvq->ready) {
 		err = modify_virtqueue(ndev, mvq, MLX5_VIRTIO_NET_Q_OBJECT_STATE_RDY);
 		if (err) {
 			mlx5_vdpa_warn(&ndev->mvdev, "failed to modify to ready vq idx %d(%d)\n",
 				       idx, err);
-			goto err_connect;
+			goto err_modify;
 		}
 	}
 
 	mvq->initialized = true;
 	return 0;
 
-err_connect:
+err_modify:
+	destroy_virtqueue(ndev, mvq);
+err_vq:
+	dealloc_vector(ndev, mvq);
 	counter_set_dealloc(ndev, mvq);
-err_counter:
+err_connect:
 	qp_destroy(ndev, &mvq->vqqp);
 err_vqqp:
 	qp_destroy(ndev, &mvq->fwqp);
@@ -1288,6 +1357,7 @@ static void teardown_vq(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *
 
 	suspend_vq(ndev, mvq);
 	destroy_virtqueue(ndev, mvq);
+	dealloc_vector(ndev, mvq);
 	counter_set_dealloc(ndev, mvq);
 	qp_destroy(ndev, &mvq->vqqp);
 	qp_destroy(ndev, &mvq->fwqp);
@@ -2505,6 +2575,7 @@ static int save_channel_info(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqu
 	ri->desc_addr = mvq->desc_addr;
 	ri->device_addr = mvq->device_addr;
 	ri->driver_addr = mvq->driver_addr;
+	ri->map = mvq->map;
 	ri->restore = true;
 	return 0;
 }
@@ -2549,6 +2620,7 @@ static void restore_channels_info(struct mlx5_vdpa_net *ndev)
 		mvq->desc_addr = ri->desc_addr;
 		mvq->device_addr = ri->device_addr;
 		mvq->driver_addr = ri->driver_addr;
+		mvq->map = ri->map;
 	}
 }
 
@@ -2833,6 +2905,25 @@ static struct device *mlx5_get_vq_dma_dev(struct vdpa_device *vdev, u16 idx)
 	return mvdev->vdev.dma_dev;
 }
 
+static void free_irqs(struct mlx5_vdpa_net *ndev)
+{
+	struct mlx5_vdpa_irq_pool_entry *ent;
+	int i;
+
+	if (!msix_mode_supported(&ndev->mvdev))
+		return;
+
+	if (!ndev->irqp.entries)
+		return;
+
+	for (i = ndev->irqp.num_ent - 1; i >= 0; i--) {
+		ent = ndev->irqp.entries + i;
+		if (ent->map.virq)
+			pci_msix_free_irq(ndev->mvdev.mdev->pdev, ent->map);
+	}
+	kfree(ndev->irqp.entries);
+}
+
 static void mlx5_vdpa_free(struct vdpa_device *vdev)
 {
 	struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
@@ -2848,6 +2939,7 @@ static void mlx5_vdpa_free(struct vdpa_device *vdev)
 		mlx5_mpfs_del_mac(pfmdev, ndev->config.mac);
 	}
 	mlx5_vdpa_free_resources(&ndev->mvdev);
+	free_irqs(ndev);
 	kfree(ndev->event_cbs);
 	kfree(ndev->vqs);
 }
@@ -2876,9 +2968,23 @@ static struct vdpa_notification_area mlx5_get_vq_notification(struct vdpa_device
 	return ret;
 }
 
-static int mlx5_get_vq_irq(struct vdpa_device *vdv, u16 idx)
+static int mlx5_get_vq_irq(struct vdpa_device *vdev, u16 idx)
 {
-	return -EOPNOTSUPP;
+	struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
+	struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
+	struct mlx5_vdpa_virtqueue *mvq;
+
+	if (!is_index_valid(mvdev, idx))
+		return -EINVAL;
+
+	if (is_ctrl_vq_idx(mvdev, idx))
+		return -EOPNOTSUPP;
+
+	mvq = &ndev->vqs[idx];
+	if (!mvq->map.virq)
+		return -EOPNOTSUPP;
+
+	return mvq->map.virq;
 }
 
 static u64 mlx5_vdpa_get_driver_features(struct vdpa_device *vdev)
@@ -3155,6 +3261,34 @@ static int config_func_mtu(struct mlx5_core_dev *mdev, u16 mtu)
 	return err;
 }
 
+static void allocate_irqs(struct mlx5_vdpa_net *ndev)
+{
+	struct mlx5_vdpa_irq_pool_entry *ent;
+	int i;
+
+	if (!msix_mode_supported(&ndev->mvdev))
+		return;
+
+	if (!ndev->mvdev.mdev->pdev)
+		return;
+
+	ndev->irqp.entries = kcalloc(ndev->mvdev.max_vqs, sizeof(*ndev->irqp.entries), GFP_KERNEL);
+	if (!ndev->irqp.entries)
+		return;
+
+
+	for (i = 0; i < ndev->mvdev.max_vqs; i++) {
+		ent = ndev->irqp.entries + i;
+		snprintf(ent->name, MLX5_VDPA_IRQ_NAME_LEN, "%s-vq-%d",
+			 dev_name(&ndev->mvdev.vdev.dev), i);
+		ent->map = pci_msix_alloc_irq_at(ndev->mvdev.mdev->pdev, MSI_ANY_INDEX, NULL);
+		if (!ent->map.virq)
+			return;
+
+		ndev->irqp.num_ent++;
+	}
+}
+
 static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name,
 			     const struct vdpa_dev_set_config *add_config)
 {
@@ -3233,6 +3367,7 @@ static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name,
 	}
 
 	init_mvqs(ndev);
+	allocate_irqs(ndev);
 	init_rwsem(&ndev->reslock);
 	config = &ndev->config;
 
@@ -3413,6 +3548,17 @@ static void mlx5v_remove(struct auxiliary_device *adev)
 	kfree(mgtdev);
 }
 
+static void mlx5v_shutdown(struct auxiliary_device *auxdev)
+{
+	struct mlx5_vdpa_mgmtdev *mgtdev;
+	struct mlx5_vdpa_net *ndev;
+
+	mgtdev = auxiliary_get_drvdata(auxdev);
+	ndev = mgtdev->ndev;
+
+	free_irqs(ndev);
+}
+
 static const struct auxiliary_device_id mlx5v_id_table[] = {
 	{ .name = MLX5_ADEV_NAME ".vnet", },
 	{},
@@ -3424,6 +3570,7 @@ static struct auxiliary_driver mlx5v_driver = {
 	.name = "vnet",
 	.probe = mlx5v_probe,
 	.remove = mlx5v_remove,
+	.shutdown = mlx5v_shutdown,
 	.id_table = mlx5v_id_table,
 };
 
diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.h b/drivers/vdpa/mlx5/net/mlx5_vnet.h
index c90a89e1de4d52..36c44d9fdd166b 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.h
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.h
@@ -26,6 +26,20 @@ static inline u16 key2vid(u64 key)
 	return (u16)(key >> 48) & 0xfff;
 }
 
+#define MLX5_VDPA_IRQ_NAME_LEN 32
+
+struct mlx5_vdpa_irq_pool_entry {
+	struct msi_map map;
+	bool used;
+	char name[MLX5_VDPA_IRQ_NAME_LEN];
+	void *dev_id;
+};
+
+struct mlx5_vdpa_irq_pool {
+	int num_ent;
+	struct mlx5_vdpa_irq_pool_entry *entries;
+};
+
 struct mlx5_vdpa_net {
 	struct mlx5_vdpa_dev mvdev;
 	struct mlx5_vdpa_net_resources res;
@@ -49,6 +63,7 @@ struct mlx5_vdpa_net {
 	struct vdpa_callback config_cb;
 	struct mlx5_vdpa_wq_ent cvq_ent;
 	struct hlist_head macvlan_hash[MLX5V_MACVLAN_SIZE];
+	struct mlx5_vdpa_irq_pool irqp;
 	struct dentry *debugfs;
 };
 
diff --git a/drivers/vdpa/pds/Makefile b/drivers/vdpa/pds/Makefile
new file mode 100644
index 00000000000000..2e22418e3ab305
--- /dev/null
+++ b/drivers/vdpa/pds/Makefile
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0-only
+# Copyright(c) 2023 Advanced Micro Devices, Inc
+
+obj-$(CONFIG_PDS_VDPA) := pds_vdpa.o
+
+pds_vdpa-y := aux_drv.o \
+	      cmds.o \
+	      vdpa_dev.o
+
+pds_vdpa-$(CONFIG_DEBUG_FS) += debugfs.o
diff --git a/drivers/vdpa/pds/aux_drv.c b/drivers/vdpa/pds/aux_drv.c
new file mode 100644
index 00000000000000..186e9ee22eb112
--- /dev/null
+++ b/drivers/vdpa/pds/aux_drv.c
@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include <linux/auxiliary_bus.h>
+#include <linux/pci.h>
+#include <linux/vdpa.h>
+#include <linux/virtio_pci_modern.h>
+
+#include <linux/pds/pds_common.h>
+#include <linux/pds/pds_core_if.h>
+#include <linux/pds/pds_adminq.h>
+#include <linux/pds/pds_auxbus.h>
+
+#include "aux_drv.h"
+#include "debugfs.h"
+#include "vdpa_dev.h"
+
+static const struct auxiliary_device_id pds_vdpa_id_table[] = {
+	{ .name = PDS_VDPA_DEV_NAME, },
+	{},
+};
+
+static int pds_vdpa_device_id_check(struct pci_dev *pdev)
+{
+	if (pdev->device != PCI_DEVICE_ID_PENSANDO_VDPA_VF ||
+	    pdev->vendor != PCI_VENDOR_ID_PENSANDO)
+		return -ENODEV;
+
+	return PCI_DEVICE_ID_PENSANDO_VDPA_VF;
+}
+
+static int pds_vdpa_probe(struct auxiliary_device *aux_dev,
+			  const struct auxiliary_device_id *id)
+
+{
+	struct pds_auxiliary_dev *padev =
+		container_of(aux_dev, struct pds_auxiliary_dev, aux_dev);
+	struct device *dev = &aux_dev->dev;
+	struct pds_vdpa_aux *vdpa_aux;
+	int err;
+
+	vdpa_aux = kzalloc(sizeof(*vdpa_aux), GFP_KERNEL);
+	if (!vdpa_aux)
+		return -ENOMEM;
+
+	vdpa_aux->padev = padev;
+	vdpa_aux->vf_id = pci_iov_vf_id(padev->vf_pdev);
+	auxiliary_set_drvdata(aux_dev, vdpa_aux);
+
+	/* Get device ident info and set up the vdpa_mgmt_dev */
+	err = pds_vdpa_get_mgmt_info(vdpa_aux);
+	if (err)
+		goto err_free_mem;
+
+	/* Find the virtio configuration */
+	vdpa_aux->vd_mdev.pci_dev = padev->vf_pdev;
+	vdpa_aux->vd_mdev.device_id_check = pds_vdpa_device_id_check;
+	vdpa_aux->vd_mdev.dma_mask = DMA_BIT_MASK(PDS_CORE_ADDR_LEN);
+	err = vp_modern_probe(&vdpa_aux->vd_mdev);
+	if (err) {
+		dev_err(dev, "Unable to probe for virtio configuration: %pe\n",
+			ERR_PTR(err));
+		goto err_free_mgmt_info;
+	}
+
+	/* Let vdpa know that we can provide devices */
+	err = vdpa_mgmtdev_register(&vdpa_aux->vdpa_mdev);
+	if (err) {
+		dev_err(dev, "%s: Failed to initialize vdpa_mgmt interface: %pe\n",
+			__func__, ERR_PTR(err));
+		goto err_free_virtio;
+	}
+
+	pds_vdpa_debugfs_add_pcidev(vdpa_aux);
+	pds_vdpa_debugfs_add_ident(vdpa_aux);
+
+	return 0;
+
+err_free_virtio:
+	vp_modern_remove(&vdpa_aux->vd_mdev);
+err_free_mgmt_info:
+	pci_free_irq_vectors(padev->vf_pdev);
+err_free_mem:
+	kfree(vdpa_aux);
+	auxiliary_set_drvdata(aux_dev, NULL);
+
+	return err;
+}
+
+static void pds_vdpa_remove(struct auxiliary_device *aux_dev)
+{
+	struct pds_vdpa_aux *vdpa_aux = auxiliary_get_drvdata(aux_dev);
+	struct device *dev = &aux_dev->dev;
+
+	vdpa_mgmtdev_unregister(&vdpa_aux->vdpa_mdev);
+	vp_modern_remove(&vdpa_aux->vd_mdev);
+	pci_free_irq_vectors(vdpa_aux->padev->vf_pdev);
+
+	pds_vdpa_debugfs_del_vdpadev(vdpa_aux);
+	kfree(vdpa_aux);
+	auxiliary_set_drvdata(aux_dev, NULL);
+
+	dev_info(dev, "Removed\n");
+}
+
+static struct auxiliary_driver pds_vdpa_driver = {
+	.name = PDS_DEV_TYPE_VDPA_STR,
+	.probe = pds_vdpa_probe,
+	.remove = pds_vdpa_remove,
+	.id_table = pds_vdpa_id_table,
+};
+
+static void __exit pds_vdpa_cleanup(void)
+{
+	auxiliary_driver_unregister(&pds_vdpa_driver);
+
+	pds_vdpa_debugfs_destroy();
+}
+module_exit(pds_vdpa_cleanup);
+
+static int __init pds_vdpa_init(void)
+{
+	int err;
+
+	pds_vdpa_debugfs_create();
+
+	err = auxiliary_driver_register(&pds_vdpa_driver);
+	if (err) {
+		pr_err("%s: aux driver register failed: %pe\n",
+		       PDS_VDPA_DRV_NAME, ERR_PTR(err));
+		pds_vdpa_debugfs_destroy();
+	}
+
+	return err;
+}
+module_init(pds_vdpa_init);
+
+MODULE_DESCRIPTION(PDS_VDPA_DRV_DESCRIPTION);
+MODULE_AUTHOR("Advanced Micro Devices, Inc");
+MODULE_LICENSE("GPL");
diff --git a/drivers/vdpa/pds/aux_drv.h b/drivers/vdpa/pds/aux_drv.h
new file mode 100644
index 00000000000000..26b75344156e4a
--- /dev/null
+++ b/drivers/vdpa/pds/aux_drv.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#ifndef _AUX_DRV_H_
+#define _AUX_DRV_H_
+
+#include <linux/virtio_pci_modern.h>
+
+#define PDS_VDPA_DRV_DESCRIPTION    "AMD/Pensando vDPA VF Device Driver"
+#define PDS_VDPA_DRV_NAME           KBUILD_MODNAME
+
+struct pds_vdpa_aux {
+	struct pds_auxiliary_dev *padev;
+
+	struct vdpa_mgmt_dev vdpa_mdev;
+	struct pds_vdpa_device *pdsv;
+
+	struct pds_vdpa_ident ident;
+
+	int vf_id;
+	struct dentry *dentry;
+	struct virtio_pci_modern_device vd_mdev;
+
+	int nintrs;
+};
+#endif /* _AUX_DRV_H_ */
diff --git a/drivers/vdpa/pds/cmds.c b/drivers/vdpa/pds/cmds.c
new file mode 100644
index 00000000000000..80863a41c3cdd2
--- /dev/null
+++ b/drivers/vdpa/pds/cmds.c
@@ -0,0 +1,185 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include <linux/vdpa.h>
+#include <linux/virtio_pci_modern.h>
+
+#include <linux/pds/pds_common.h>
+#include <linux/pds/pds_core_if.h>
+#include <linux/pds/pds_adminq.h>
+#include <linux/pds/pds_auxbus.h>
+
+#include "vdpa_dev.h"
+#include "aux_drv.h"
+#include "cmds.h"
+
+int pds_vdpa_init_hw(struct pds_vdpa_device *pdsv)
+{
+	struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+	struct device *dev = &padev->aux_dev.dev;
+	union pds_core_adminq_cmd cmd = {
+		.vdpa_init.opcode = PDS_VDPA_CMD_INIT,
+		.vdpa_init.vdpa_index = pdsv->vdpa_index,
+		.vdpa_init.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
+	};
+	union pds_core_adminq_comp comp = {};
+	int err;
+
+	/* Initialize the vdpa/virtio device */
+	err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_init),
+				    &comp, 0);
+	if (err)
+		dev_dbg(dev, "Failed to init hw, status %d: %pe\n",
+			comp.status, ERR_PTR(err));
+
+	return err;
+}
+
+int pds_vdpa_cmd_reset(struct pds_vdpa_device *pdsv)
+{
+	struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+	struct device *dev = &padev->aux_dev.dev;
+	union pds_core_adminq_cmd cmd = {
+		.vdpa.opcode = PDS_VDPA_CMD_RESET,
+		.vdpa.vdpa_index = pdsv->vdpa_index,
+		.vdpa.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
+	};
+	union pds_core_adminq_comp comp = {};
+	int err;
+
+	err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa), &comp, 0);
+	if (err)
+		dev_dbg(dev, "Failed to reset hw, status %d: %pe\n",
+			comp.status, ERR_PTR(err));
+
+	return err;
+}
+
+int pds_vdpa_cmd_set_status(struct pds_vdpa_device *pdsv, u8 status)
+{
+	struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+	struct device *dev = &padev->aux_dev.dev;
+	union pds_core_adminq_cmd cmd = {
+		.vdpa_status.opcode = PDS_VDPA_CMD_STATUS_UPDATE,
+		.vdpa_status.vdpa_index = pdsv->vdpa_index,
+		.vdpa_status.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
+		.vdpa_status.status = status,
+	};
+	union pds_core_adminq_comp comp = {};
+	int err;
+
+	err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_status), &comp, 0);
+	if (err)
+		dev_dbg(dev, "Failed to set status to %#x, error status %d: %pe\n",
+			status, comp.status, ERR_PTR(err));
+
+	return err;
+}
+
+int pds_vdpa_cmd_set_mac(struct pds_vdpa_device *pdsv, u8 *mac)
+{
+	struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+	struct device *dev = &padev->aux_dev.dev;
+	union pds_core_adminq_cmd cmd = {
+		.vdpa_setattr.opcode = PDS_VDPA_CMD_SET_ATTR,
+		.vdpa_setattr.vdpa_index = pdsv->vdpa_index,
+		.vdpa_setattr.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
+		.vdpa_setattr.attr = PDS_VDPA_ATTR_MAC,
+	};
+	union pds_core_adminq_comp comp = {};
+	int err;
+
+	ether_addr_copy(cmd.vdpa_setattr.mac, mac);
+	err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_setattr),
+				    &comp, 0);
+	if (err)
+		dev_dbg(dev, "Failed to set mac address %pM, status %d: %pe\n",
+			mac, comp.status, ERR_PTR(err));
+
+	return err;
+}
+
+int pds_vdpa_cmd_set_max_vq_pairs(struct pds_vdpa_device *pdsv, u16 max_vqp)
+{
+	struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+	struct device *dev = &padev->aux_dev.dev;
+	union pds_core_adminq_cmd cmd = {
+		.vdpa_setattr.opcode = PDS_VDPA_CMD_SET_ATTR,
+		.vdpa_setattr.vdpa_index = pdsv->vdpa_index,
+		.vdpa_setattr.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
+		.vdpa_setattr.attr = PDS_VDPA_ATTR_MAX_VQ_PAIRS,
+		.vdpa_setattr.max_vq_pairs = cpu_to_le16(max_vqp),
+	};
+	union pds_core_adminq_comp comp = {};
+	int err;
+
+	err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_setattr),
+				    &comp, 0);
+	if (err)
+		dev_dbg(dev, "Failed to set max vq pairs %u, status %d: %pe\n",
+			max_vqp, comp.status, ERR_PTR(err));
+
+	return err;
+}
+
+int pds_vdpa_cmd_init_vq(struct pds_vdpa_device *pdsv, u16 qid, u16 invert_idx,
+			 struct pds_vdpa_vq_info *vq_info)
+{
+	struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+	struct device *dev = &padev->aux_dev.dev;
+	union pds_core_adminq_cmd cmd = {
+		.vdpa_vq_init.opcode = PDS_VDPA_CMD_VQ_INIT,
+		.vdpa_vq_init.vdpa_index = pdsv->vdpa_index,
+		.vdpa_vq_init.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
+		.vdpa_vq_init.qid = cpu_to_le16(qid),
+		.vdpa_vq_init.len = cpu_to_le16(ilog2(vq_info->q_len)),
+		.vdpa_vq_init.desc_addr = cpu_to_le64(vq_info->desc_addr),
+		.vdpa_vq_init.avail_addr = cpu_to_le64(vq_info->avail_addr),
+		.vdpa_vq_init.used_addr = cpu_to_le64(vq_info->used_addr),
+		.vdpa_vq_init.intr_index = cpu_to_le16(qid),
+		.vdpa_vq_init.avail_index = cpu_to_le16(vq_info->avail_idx ^ invert_idx),
+		.vdpa_vq_init.used_index = cpu_to_le16(vq_info->used_idx ^ invert_idx),
+	};
+	union pds_core_adminq_comp comp = {};
+	int err;
+
+	dev_dbg(dev, "%s: qid %d len %d desc_addr %#llx avail_addr %#llx used_addr %#llx\n",
+		__func__, qid, ilog2(vq_info->q_len),
+		vq_info->desc_addr, vq_info->avail_addr, vq_info->used_addr);
+
+	err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_vq_init),
+				    &comp, 0);
+	if (err)
+		dev_dbg(dev, "Failed to init vq %d, status %d: %pe\n",
+			qid, comp.status, ERR_PTR(err));
+
+	return err;
+}
+
+int pds_vdpa_cmd_reset_vq(struct pds_vdpa_device *pdsv, u16 qid, u16 invert_idx,
+			  struct pds_vdpa_vq_info *vq_info)
+{
+	struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+	struct device *dev = &padev->aux_dev.dev;
+	union pds_core_adminq_cmd cmd = {
+		.vdpa_vq_reset.opcode = PDS_VDPA_CMD_VQ_RESET,
+		.vdpa_vq_reset.vdpa_index = pdsv->vdpa_index,
+		.vdpa_vq_reset.vf_id = cpu_to_le16(pdsv->vdpa_aux->vf_id),
+		.vdpa_vq_reset.qid = cpu_to_le16(qid),
+	};
+	union pds_core_adminq_comp comp = {};
+	int err;
+
+	err = pds_client_adminq_cmd(padev, &cmd, sizeof(cmd.vdpa_vq_reset),
+				    &comp, 0);
+	if (err) {
+		dev_dbg(dev, "Failed to reset vq %d, status %d: %pe\n",
+			qid, comp.status, ERR_PTR(err));
+		return err;
+	}
+
+	vq_info->avail_idx = le16_to_cpu(comp.vdpa_vq_reset.avail_index) ^ invert_idx;
+	vq_info->used_idx = le16_to_cpu(comp.vdpa_vq_reset.used_index) ^ invert_idx;
+
+	return 0;
+}
diff --git a/drivers/vdpa/pds/cmds.h b/drivers/vdpa/pds/cmds.h
new file mode 100644
index 00000000000000..e24d85cb8f1ced
--- /dev/null
+++ b/drivers/vdpa/pds/cmds.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#ifndef _VDPA_CMDS_H_
+#define _VDPA_CMDS_H_
+
+int pds_vdpa_init_hw(struct pds_vdpa_device *pdsv);
+
+int pds_vdpa_cmd_reset(struct pds_vdpa_device *pdsv);
+int pds_vdpa_cmd_set_status(struct pds_vdpa_device *pdsv, u8 status);
+int pds_vdpa_cmd_set_mac(struct pds_vdpa_device *pdsv, u8 *mac);
+int pds_vdpa_cmd_set_max_vq_pairs(struct pds_vdpa_device *pdsv, u16 max_vqp);
+int pds_vdpa_cmd_init_vq(struct pds_vdpa_device *pdsv, u16 qid, u16 invert_idx,
+			 struct pds_vdpa_vq_info *vq_info);
+int pds_vdpa_cmd_reset_vq(struct pds_vdpa_device *pdsv, u16 qid, u16 invert_idx,
+			  struct pds_vdpa_vq_info *vq_info);
+int pds_vdpa_cmd_set_features(struct pds_vdpa_device *pdsv, u64 features);
+#endif /* _VDPA_CMDS_H_ */
diff --git a/drivers/vdpa/pds/debugfs.c b/drivers/vdpa/pds/debugfs.c
new file mode 100644
index 00000000000000..21a0dc0cb607ca
--- /dev/null
+++ b/drivers/vdpa/pds/debugfs.c
@@ -0,0 +1,289 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include <linux/pci.h>
+#include <linux/vdpa.h>
+
+#include <linux/pds/pds_common.h>
+#include <linux/pds/pds_core_if.h>
+#include <linux/pds/pds_adminq.h>
+#include <linux/pds/pds_auxbus.h>
+
+#include "aux_drv.h"
+#include "vdpa_dev.h"
+#include "debugfs.h"
+
+static struct dentry *dbfs_dir;
+
+void pds_vdpa_debugfs_create(void)
+{
+	dbfs_dir = debugfs_create_dir(PDS_VDPA_DRV_NAME, NULL);
+}
+
+void pds_vdpa_debugfs_destroy(void)
+{
+	debugfs_remove_recursive(dbfs_dir);
+	dbfs_dir = NULL;
+}
+
+#define PRINT_SBIT_NAME(__seq, __f, __name)                     \
+	do {                                                    \
+		if ((__f) & (__name))                               \
+			seq_printf(__seq, " %s", &#__name[16]); \
+	} while (0)
+
+static void print_status_bits(struct seq_file *seq, u8 status)
+{
+	seq_puts(seq, "status:");
+	PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_ACKNOWLEDGE);
+	PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_DRIVER);
+	PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_DRIVER_OK);
+	PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_FEATURES_OK);
+	PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_NEEDS_RESET);
+	PRINT_SBIT_NAME(seq, status, VIRTIO_CONFIG_S_FAILED);
+	seq_puts(seq, "\n");
+}
+
+static void print_feature_bits_all(struct seq_file *seq, u64 features)
+{
+	int i;
+
+	seq_puts(seq, "features:");
+
+	for (i = 0; i < (sizeof(u64) * 8); i++) {
+		u64 mask = BIT_ULL(i);
+
+		switch (features & mask) {
+		case BIT_ULL(VIRTIO_NET_F_CSUM):
+			seq_puts(seq, " VIRTIO_NET_F_CSUM");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_GUEST_CSUM):
+			seq_puts(seq, " VIRTIO_NET_F_GUEST_CSUM");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_CTRL_GUEST_OFFLOADS):
+			seq_puts(seq, " VIRTIO_NET_F_CTRL_GUEST_OFFLOADS");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_MTU):
+			seq_puts(seq, " VIRTIO_NET_F_MTU");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_MAC):
+			seq_puts(seq, " VIRTIO_NET_F_MAC");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_GUEST_TSO4):
+			seq_puts(seq, " VIRTIO_NET_F_GUEST_TSO4");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_GUEST_TSO6):
+			seq_puts(seq, " VIRTIO_NET_F_GUEST_TSO6");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_GUEST_ECN):
+			seq_puts(seq, " VIRTIO_NET_F_GUEST_ECN");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_GUEST_UFO):
+			seq_puts(seq, " VIRTIO_NET_F_GUEST_UFO");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_HOST_TSO4):
+			seq_puts(seq, " VIRTIO_NET_F_HOST_TSO4");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_HOST_TSO6):
+			seq_puts(seq, " VIRTIO_NET_F_HOST_TSO6");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_HOST_ECN):
+			seq_puts(seq, " VIRTIO_NET_F_HOST_ECN");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_HOST_UFO):
+			seq_puts(seq, " VIRTIO_NET_F_HOST_UFO");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_MRG_RXBUF):
+			seq_puts(seq, " VIRTIO_NET_F_MRG_RXBUF");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_STATUS):
+			seq_puts(seq, " VIRTIO_NET_F_STATUS");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_CTRL_VQ):
+			seq_puts(seq, " VIRTIO_NET_F_CTRL_VQ");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_CTRL_RX):
+			seq_puts(seq, " VIRTIO_NET_F_CTRL_RX");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_CTRL_VLAN):
+			seq_puts(seq, " VIRTIO_NET_F_CTRL_VLAN");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_CTRL_RX_EXTRA):
+			seq_puts(seq, " VIRTIO_NET_F_CTRL_RX_EXTRA");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_GUEST_ANNOUNCE):
+			seq_puts(seq, " VIRTIO_NET_F_GUEST_ANNOUNCE");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_MQ):
+			seq_puts(seq, " VIRTIO_NET_F_MQ");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR):
+			seq_puts(seq, " VIRTIO_NET_F_CTRL_MAC_ADDR");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_HASH_REPORT):
+			seq_puts(seq, " VIRTIO_NET_F_HASH_REPORT");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_RSS):
+			seq_puts(seq, " VIRTIO_NET_F_RSS");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_RSC_EXT):
+			seq_puts(seq, " VIRTIO_NET_F_RSC_EXT");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_STANDBY):
+			seq_puts(seq, " VIRTIO_NET_F_STANDBY");
+			break;
+		case BIT_ULL(VIRTIO_NET_F_SPEED_DUPLEX):
+			seq_puts(seq, " VIRTIO_NET_F_SPEED_DUPLEX");
+			break;
+		case BIT_ULL(VIRTIO_F_NOTIFY_ON_EMPTY):
+			seq_puts(seq, " VIRTIO_F_NOTIFY_ON_EMPTY");
+			break;
+		case BIT_ULL(VIRTIO_F_ANY_LAYOUT):
+			seq_puts(seq, " VIRTIO_F_ANY_LAYOUT");
+			break;
+		case BIT_ULL(VIRTIO_F_VERSION_1):
+			seq_puts(seq, " VIRTIO_F_VERSION_1");
+			break;
+		case BIT_ULL(VIRTIO_F_ACCESS_PLATFORM):
+			seq_puts(seq, " VIRTIO_F_ACCESS_PLATFORM");
+			break;
+		case BIT_ULL(VIRTIO_F_RING_PACKED):
+			seq_puts(seq, " VIRTIO_F_RING_PACKED");
+			break;
+		case BIT_ULL(VIRTIO_F_ORDER_PLATFORM):
+			seq_puts(seq, " VIRTIO_F_ORDER_PLATFORM");
+			break;
+		case BIT_ULL(VIRTIO_F_SR_IOV):
+			seq_puts(seq, " VIRTIO_F_SR_IOV");
+			break;
+		case 0:
+			break;
+		default:
+			seq_printf(seq, " bit_%d", i);
+			break;
+		}
+	}
+
+	seq_puts(seq, "\n");
+}
+
+void pds_vdpa_debugfs_add_pcidev(struct pds_vdpa_aux *vdpa_aux)
+{
+	vdpa_aux->dentry = debugfs_create_dir(pci_name(vdpa_aux->padev->vf_pdev), dbfs_dir);
+}
+
+static int identity_show(struct seq_file *seq, void *v)
+{
+	struct pds_vdpa_aux *vdpa_aux = seq->private;
+	struct vdpa_mgmt_dev *mgmt;
+
+	seq_printf(seq, "aux_dev:            %s\n",
+		   dev_name(&vdpa_aux->padev->aux_dev.dev));
+
+	mgmt = &vdpa_aux->vdpa_mdev;
+	seq_printf(seq, "max_vqs:            %d\n", mgmt->max_supported_vqs);
+	seq_printf(seq, "config_attr_mask:   %#llx\n", mgmt->config_attr_mask);
+	seq_printf(seq, "supported_features: %#llx\n", mgmt->supported_features);
+	print_feature_bits_all(seq, mgmt->supported_features);
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(identity);
+
+void pds_vdpa_debugfs_add_ident(struct pds_vdpa_aux *vdpa_aux)
+{
+	debugfs_create_file("identity", 0400, vdpa_aux->dentry,
+			    vdpa_aux, &identity_fops);
+}
+
+static int config_show(struct seq_file *seq, void *v)
+{
+	struct pds_vdpa_device *pdsv = seq->private;
+	struct virtio_net_config vc;
+	u64 driver_features;
+	u8 status;
+
+	memcpy_fromio(&vc, pdsv->vdpa_aux->vd_mdev.device,
+		      sizeof(struct virtio_net_config));
+
+	seq_printf(seq, "mac:                  %pM\n", vc.mac);
+	seq_printf(seq, "max_virtqueue_pairs:  %d\n",
+		   __virtio16_to_cpu(true, vc.max_virtqueue_pairs));
+	seq_printf(seq, "mtu:                  %d\n", __virtio16_to_cpu(true, vc.mtu));
+	seq_printf(seq, "speed:                %d\n", le32_to_cpu(vc.speed));
+	seq_printf(seq, "duplex:               %d\n", vc.duplex);
+	seq_printf(seq, "rss_max_key_size:     %d\n", vc.rss_max_key_size);
+	seq_printf(seq, "rss_max_indirection_table_length: %d\n",
+		   le16_to_cpu(vc.rss_max_indirection_table_length));
+	seq_printf(seq, "supported_hash_types: %#x\n",
+		   le32_to_cpu(vc.supported_hash_types));
+	seq_printf(seq, "vn_status:            %#x\n",
+		   __virtio16_to_cpu(true, vc.status));
+
+	status = vp_modern_get_status(&pdsv->vdpa_aux->vd_mdev);
+	seq_printf(seq, "dev_status:           %#x\n", status);
+	print_status_bits(seq, status);
+
+	seq_printf(seq, "req_features:         %#llx\n", pdsv->req_features);
+	print_feature_bits_all(seq, pdsv->req_features);
+	driver_features = vp_modern_get_driver_features(&pdsv->vdpa_aux->vd_mdev);
+	seq_printf(seq, "driver_features:      %#llx\n", driver_features);
+	print_feature_bits_all(seq, driver_features);
+	seq_printf(seq, "vdpa_index:           %d\n", pdsv->vdpa_index);
+	seq_printf(seq, "num_vqs:              %d\n", pdsv->num_vqs);
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(config);
+
+static int vq_show(struct seq_file *seq, void *v)
+{
+	struct pds_vdpa_vq_info *vq = seq->private;
+
+	seq_printf(seq, "ready:      %d\n", vq->ready);
+	seq_printf(seq, "desc_addr:  %#llx\n", vq->desc_addr);
+	seq_printf(seq, "avail_addr: %#llx\n", vq->avail_addr);
+	seq_printf(seq, "used_addr:  %#llx\n", vq->used_addr);
+	seq_printf(seq, "q_len:      %d\n", vq->q_len);
+	seq_printf(seq, "qid:        %d\n", vq->qid);
+
+	seq_printf(seq, "doorbell:   %#llx\n", vq->doorbell);
+	seq_printf(seq, "avail_idx:  %d\n", vq->avail_idx);
+	seq_printf(seq, "used_idx:   %d\n", vq->used_idx);
+	seq_printf(seq, "irq:        %d\n", vq->irq);
+	seq_printf(seq, "irq-name:   %s\n", vq->irq_name);
+
+	return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(vq);
+
+void pds_vdpa_debugfs_add_vdpadev(struct pds_vdpa_aux *vdpa_aux)
+{
+	int i;
+
+	debugfs_create_file("config", 0400, vdpa_aux->dentry, vdpa_aux->pdsv, &config_fops);
+
+	for (i = 0; i < vdpa_aux->pdsv->num_vqs; i++) {
+		char name[8];
+
+		snprintf(name, sizeof(name), "vq%02d", i);
+		debugfs_create_file(name, 0400, vdpa_aux->dentry,
+				    &vdpa_aux->pdsv->vqs[i], &vq_fops);
+	}
+}
+
+void pds_vdpa_debugfs_del_vdpadev(struct pds_vdpa_aux *vdpa_aux)
+{
+	debugfs_remove_recursive(vdpa_aux->dentry);
+	vdpa_aux->dentry = NULL;
+}
+
+void pds_vdpa_debugfs_reset_vdpadev(struct pds_vdpa_aux *vdpa_aux)
+{
+	/* we don't keep track of the entries, so remove it all
+	 * then rebuild the basics
+	 */
+	pds_vdpa_debugfs_del_vdpadev(vdpa_aux);
+	pds_vdpa_debugfs_add_pcidev(vdpa_aux);
+	pds_vdpa_debugfs_add_ident(vdpa_aux);
+}
diff --git a/drivers/vdpa/pds/debugfs.h b/drivers/vdpa/pds/debugfs.h
new file mode 100644
index 00000000000000..c088a4e8f1e929
--- /dev/null
+++ b/drivers/vdpa/pds/debugfs.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#ifndef _PDS_VDPA_DEBUGFS_H_
+#define _PDS_VDPA_DEBUGFS_H_
+
+#include <linux/debugfs.h>
+
+void pds_vdpa_debugfs_create(void);
+void pds_vdpa_debugfs_destroy(void);
+void pds_vdpa_debugfs_add_pcidev(struct pds_vdpa_aux *vdpa_aux);
+void pds_vdpa_debugfs_add_ident(struct pds_vdpa_aux *vdpa_aux);
+void pds_vdpa_debugfs_add_vdpadev(struct pds_vdpa_aux *vdpa_aux);
+void pds_vdpa_debugfs_del_vdpadev(struct pds_vdpa_aux *vdpa_aux);
+void pds_vdpa_debugfs_reset_vdpadev(struct pds_vdpa_aux *vdpa_aux);
+
+#endif /* _PDS_VDPA_DEBUGFS_H_ */
diff --git a/drivers/vdpa/pds/vdpa_dev.c b/drivers/vdpa/pds/vdpa_dev.c
new file mode 100644
index 00000000000000..5071a4d58f8db3
--- /dev/null
+++ b/drivers/vdpa/pds/vdpa_dev.c
@@ -0,0 +1,769 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#include <linux/pci.h>
+#include <linux/vdpa.h>
+#include <uapi/linux/vdpa.h>
+#include <linux/virtio_pci_modern.h>
+
+#include <linux/pds/pds_common.h>
+#include <linux/pds/pds_core_if.h>
+#include <linux/pds/pds_adminq.h>
+#include <linux/pds/pds_auxbus.h>
+
+#include "vdpa_dev.h"
+#include "aux_drv.h"
+#include "cmds.h"
+#include "debugfs.h"
+
+static u64 pds_vdpa_get_driver_features(struct vdpa_device *vdpa_dev);
+
+static struct pds_vdpa_device *vdpa_to_pdsv(struct vdpa_device *vdpa_dev)
+{
+	return container_of(vdpa_dev, struct pds_vdpa_device, vdpa_dev);
+}
+
+static int pds_vdpa_notify_handler(struct notifier_block *nb,
+				   unsigned long ecode,
+				   void *data)
+{
+	struct pds_vdpa_device *pdsv = container_of(nb, struct pds_vdpa_device, nb);
+	struct device *dev = &pdsv->vdpa_aux->padev->aux_dev.dev;
+
+	dev_dbg(dev, "%s: event code %lu\n", __func__, ecode);
+
+	if (ecode == PDS_EVENT_RESET || ecode == PDS_EVENT_LINK_CHANGE) {
+		if (pdsv->config_cb.callback)
+			pdsv->config_cb.callback(pdsv->config_cb.private);
+	}
+
+	return 0;
+}
+
+static int pds_vdpa_register_event_handler(struct pds_vdpa_device *pdsv)
+{
+	struct device *dev = &pdsv->vdpa_aux->padev->aux_dev.dev;
+	struct notifier_block *nb = &pdsv->nb;
+	int err;
+
+	if (!nb->notifier_call) {
+		nb->notifier_call = pds_vdpa_notify_handler;
+		err = pdsc_register_notify(nb);
+		if (err) {
+			nb->notifier_call = NULL;
+			dev_err(dev, "failed to register pds event handler: %ps\n",
+				ERR_PTR(err));
+			return -EINVAL;
+		}
+		dev_dbg(dev, "pds event handler registered\n");
+	}
+
+	return 0;
+}
+
+static void pds_vdpa_unregister_event_handler(struct pds_vdpa_device *pdsv)
+{
+	if (pdsv->nb.notifier_call) {
+		pdsc_unregister_notify(&pdsv->nb);
+		pdsv->nb.notifier_call = NULL;
+	}
+}
+
+static int pds_vdpa_set_vq_address(struct vdpa_device *vdpa_dev, u16 qid,
+				   u64 desc_addr, u64 driver_addr, u64 device_addr)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+
+	pdsv->vqs[qid].desc_addr = desc_addr;
+	pdsv->vqs[qid].avail_addr = driver_addr;
+	pdsv->vqs[qid].used_addr = device_addr;
+
+	return 0;
+}
+
+static void pds_vdpa_set_vq_num(struct vdpa_device *vdpa_dev, u16 qid, u32 num)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+
+	pdsv->vqs[qid].q_len = num;
+}
+
+static void pds_vdpa_kick_vq(struct vdpa_device *vdpa_dev, u16 qid)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+
+	iowrite16(qid, pdsv->vqs[qid].notify);
+}
+
+static void pds_vdpa_set_vq_cb(struct vdpa_device *vdpa_dev, u16 qid,
+			       struct vdpa_callback *cb)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+
+	pdsv->vqs[qid].event_cb = *cb;
+}
+
+static irqreturn_t pds_vdpa_isr(int irq, void *data)
+{
+	struct pds_vdpa_vq_info *vq;
+
+	vq = data;
+	if (vq->event_cb.callback)
+		vq->event_cb.callback(vq->event_cb.private);
+
+	return IRQ_HANDLED;
+}
+
+static void pds_vdpa_release_irq(struct pds_vdpa_device *pdsv, int qid)
+{
+	if (pdsv->vqs[qid].irq == VIRTIO_MSI_NO_VECTOR)
+		return;
+
+	free_irq(pdsv->vqs[qid].irq, &pdsv->vqs[qid]);
+	pdsv->vqs[qid].irq = VIRTIO_MSI_NO_VECTOR;
+}
+
+static void pds_vdpa_set_vq_ready(struct vdpa_device *vdpa_dev, u16 qid, bool ready)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+	struct pci_dev *pdev = pdsv->vdpa_aux->padev->vf_pdev;
+	struct device *dev = &pdsv->vdpa_dev.dev;
+	u64 driver_features;
+	u16 invert_idx = 0;
+	int irq;
+	int err;
+
+	dev_dbg(dev, "%s: qid %d ready %d => %d\n",
+		__func__, qid, pdsv->vqs[qid].ready, ready);
+	if (ready == pdsv->vqs[qid].ready)
+		return;
+
+	driver_features = pds_vdpa_get_driver_features(vdpa_dev);
+	if (driver_features & BIT_ULL(VIRTIO_F_RING_PACKED))
+		invert_idx = PDS_VDPA_PACKED_INVERT_IDX;
+
+	if (ready) {
+		irq = pci_irq_vector(pdev, qid);
+		snprintf(pdsv->vqs[qid].irq_name, sizeof(pdsv->vqs[qid].irq_name),
+			 "vdpa-%s-%d", dev_name(dev), qid);
+
+		err = request_irq(irq, pds_vdpa_isr, 0,
+				  pdsv->vqs[qid].irq_name, &pdsv->vqs[qid]);
+		if (err) {
+			dev_err(dev, "%s: no irq for qid %d: %pe\n",
+				__func__, qid, ERR_PTR(err));
+			return;
+		}
+		pdsv->vqs[qid].irq = irq;
+
+		/* Pass vq setup info to DSC using adminq to gather up and
+		 * send all info at once so FW can do its full set up in
+		 * one easy operation
+		 */
+		err = pds_vdpa_cmd_init_vq(pdsv, qid, invert_idx, &pdsv->vqs[qid]);
+		if (err) {
+			dev_err(dev, "Failed to init vq %d: %pe\n",
+				qid, ERR_PTR(err));
+			pds_vdpa_release_irq(pdsv, qid);
+			ready = false;
+		}
+	} else {
+		err = pds_vdpa_cmd_reset_vq(pdsv, qid, invert_idx, &pdsv->vqs[qid]);
+		if (err)
+			dev_err(dev, "%s: reset_vq failed qid %d: %pe\n",
+				__func__, qid, ERR_PTR(err));
+		pds_vdpa_release_irq(pdsv, qid);
+	}
+
+	pdsv->vqs[qid].ready = ready;
+}
+
+static bool pds_vdpa_get_vq_ready(struct vdpa_device *vdpa_dev, u16 qid)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+
+	return pdsv->vqs[qid].ready;
+}
+
+static int pds_vdpa_set_vq_state(struct vdpa_device *vdpa_dev, u16 qid,
+				 const struct vdpa_vq_state *state)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+	struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+	struct device *dev = &padev->aux_dev.dev;
+	u64 driver_features;
+	u16 avail;
+	u16 used;
+
+	if (pdsv->vqs[qid].ready) {
+		dev_err(dev, "Setting device position is denied while vq is enabled\n");
+		return -EINVAL;
+	}
+
+	driver_features = pds_vdpa_get_driver_features(vdpa_dev);
+	if (driver_features & BIT_ULL(VIRTIO_F_RING_PACKED)) {
+		avail = state->packed.last_avail_idx |
+			(state->packed.last_avail_counter << 15);
+		used = state->packed.last_used_idx |
+		       (state->packed.last_used_counter << 15);
+
+		/* The avail and used index are stored with the packed wrap
+		 * counter bit inverted.  This way, in case set_vq_state is
+		 * not called, the initial value can be set to zero prior to
+		 * feature negotiation, and it is good for both packed and
+		 * split vq.
+		 */
+		avail ^= PDS_VDPA_PACKED_INVERT_IDX;
+		used ^= PDS_VDPA_PACKED_INVERT_IDX;
+	} else {
+		avail = state->split.avail_index;
+		/* state->split does not provide a used_index:
+		 * the vq will be set to "empty" here, and the vq will read
+		 * the current used index the next time the vq is kicked.
+		 */
+		used = avail;
+	}
+
+	if (used != avail) {
+		dev_dbg(dev, "Setting used equal to avail, for interoperability\n");
+		used = avail;
+	}
+
+	pdsv->vqs[qid].avail_idx = avail;
+	pdsv->vqs[qid].used_idx = used;
+
+	return 0;
+}
+
+static int pds_vdpa_get_vq_state(struct vdpa_device *vdpa_dev, u16 qid,
+				 struct vdpa_vq_state *state)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+	struct pds_auxiliary_dev *padev = pdsv->vdpa_aux->padev;
+	struct device *dev = &padev->aux_dev.dev;
+	u64 driver_features;
+	u16 avail;
+	u16 used;
+
+	if (pdsv->vqs[qid].ready) {
+		dev_err(dev, "Getting device position is denied while vq is enabled\n");
+		return -EINVAL;
+	}
+
+	avail = pdsv->vqs[qid].avail_idx;
+	used = pdsv->vqs[qid].used_idx;
+
+	driver_features = pds_vdpa_get_driver_features(vdpa_dev);
+	if (driver_features & BIT_ULL(VIRTIO_F_RING_PACKED)) {
+		avail ^= PDS_VDPA_PACKED_INVERT_IDX;
+		used ^= PDS_VDPA_PACKED_INVERT_IDX;
+
+		state->packed.last_avail_idx = avail & 0x7fff;
+		state->packed.last_avail_counter = avail >> 15;
+		state->packed.last_used_idx = used & 0x7fff;
+		state->packed.last_used_counter = used >> 15;
+	} else {
+		state->split.avail_index = avail;
+		/* state->split does not provide a used_index. */
+	}
+
+	return 0;
+}
+
+static struct vdpa_notification_area
+pds_vdpa_get_vq_notification(struct vdpa_device *vdpa_dev, u16 qid)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+	struct virtio_pci_modern_device *vd_mdev;
+	struct vdpa_notification_area area;
+
+	area.addr = pdsv->vqs[qid].notify_pa;
+
+	vd_mdev = &pdsv->vdpa_aux->vd_mdev;
+	if (!vd_mdev->notify_offset_multiplier)
+		area.size = PDS_PAGE_SIZE;
+	else
+		area.size = vd_mdev->notify_offset_multiplier;
+
+	return area;
+}
+
+static int pds_vdpa_get_vq_irq(struct vdpa_device *vdpa_dev, u16 qid)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+
+	return pdsv->vqs[qid].irq;
+}
+
+static u32 pds_vdpa_get_vq_align(struct vdpa_device *vdpa_dev)
+{
+	return PDS_PAGE_SIZE;
+}
+
+static u32 pds_vdpa_get_vq_group(struct vdpa_device *vdpa_dev, u16 idx)
+{
+	return 0;
+}
+
+static u64 pds_vdpa_get_device_features(struct vdpa_device *vdpa_dev)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+
+	return pdsv->supported_features;
+}
+
+static int pds_vdpa_set_driver_features(struct vdpa_device *vdpa_dev, u64 features)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+	struct device *dev = &pdsv->vdpa_dev.dev;
+	u64 driver_features;
+	u64 nego_features;
+	u64 missing;
+
+	if (!(features & BIT_ULL(VIRTIO_F_ACCESS_PLATFORM)) && features) {
+		dev_err(dev, "VIRTIO_F_ACCESS_PLATFORM is not negotiated\n");
+		return -EOPNOTSUPP;
+	}
+
+	pdsv->req_features = features;
+
+	/* Check for valid feature bits */
+	nego_features = features & le64_to_cpu(pdsv->vdpa_aux->ident.hw_features);
+	missing = pdsv->req_features & ~nego_features;
+	if (missing) {
+		dev_err(dev, "Can't support all requested features in %#llx, missing %#llx features\n",
+			pdsv->req_features, missing);
+		return -EOPNOTSUPP;
+	}
+
+	driver_features = pds_vdpa_get_driver_features(vdpa_dev);
+	dev_dbg(dev, "%s: %#llx => %#llx\n",
+		__func__, driver_features, nego_features);
+
+	if (driver_features == nego_features)
+		return 0;
+
+	vp_modern_set_features(&pdsv->vdpa_aux->vd_mdev, nego_features);
+
+	return 0;
+}
+
+static u64 pds_vdpa_get_driver_features(struct vdpa_device *vdpa_dev)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+
+	return vp_modern_get_driver_features(&pdsv->vdpa_aux->vd_mdev);
+}
+
+static void pds_vdpa_set_config_cb(struct vdpa_device *vdpa_dev,
+				   struct vdpa_callback *cb)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+
+	pdsv->config_cb.callback = cb->callback;
+	pdsv->config_cb.private = cb->private;
+}
+
+static u16 pds_vdpa_get_vq_num_max(struct vdpa_device *vdpa_dev)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+
+	/* qemu has assert() that vq_num_max <= VIRTQUEUE_MAX_SIZE (1024) */
+	return min_t(u16, 1024, BIT(le16_to_cpu(pdsv->vdpa_aux->ident.max_qlen)));
+}
+
+static u32 pds_vdpa_get_device_id(struct vdpa_device *vdpa_dev)
+{
+	return VIRTIO_ID_NET;
+}
+
+static u32 pds_vdpa_get_vendor_id(struct vdpa_device *vdpa_dev)
+{
+	return PCI_VENDOR_ID_PENSANDO;
+}
+
+static u8 pds_vdpa_get_status(struct vdpa_device *vdpa_dev)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+
+	return vp_modern_get_status(&pdsv->vdpa_aux->vd_mdev);
+}
+
+static void pds_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+	struct device *dev = &pdsv->vdpa_dev.dev;
+	u8 old_status;
+	int i;
+
+	old_status = pds_vdpa_get_status(vdpa_dev);
+	dev_dbg(dev, "%s: old %#x new %#x\n", __func__, old_status, status);
+
+	pds_vdpa_cmd_set_status(pdsv, status);
+
+	/* Note: still working with FW on the need for this reset cmd */
+	if (status == 0) {
+		pds_vdpa_cmd_reset(pdsv);
+
+		for (i = 0; i < pdsv->num_vqs; i++) {
+			pdsv->vqs[i].avail_idx = 0;
+			pdsv->vqs[i].used_idx = 0;
+		}
+	}
+
+	if (status & ~old_status & VIRTIO_CONFIG_S_FEATURES_OK) {
+		for (i = 0; i < pdsv->num_vqs; i++) {
+			pdsv->vqs[i].notify =
+				vp_modern_map_vq_notify(&pdsv->vdpa_aux->vd_mdev,
+							i, &pdsv->vqs[i].notify_pa);
+		}
+	}
+}
+
+static int pds_vdpa_reset(struct vdpa_device *vdpa_dev)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+	struct device *dev;
+	int err = 0;
+	u8 status;
+	int i;
+
+	dev = &pdsv->vdpa_aux->padev->aux_dev.dev;
+	status = pds_vdpa_get_status(vdpa_dev);
+
+	if (status == 0)
+		return 0;
+
+	if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
+		/* Reset the vqs */
+		for (i = 0; i < pdsv->num_vqs && !err; i++) {
+			err = pds_vdpa_cmd_reset_vq(pdsv, i, 0, &pdsv->vqs[i]);
+			if (err)
+				dev_err(dev, "%s: reset_vq failed qid %d: %pe\n",
+					__func__, i, ERR_PTR(err));
+			pds_vdpa_release_irq(pdsv, i);
+			memset(&pdsv->vqs[i], 0, sizeof(pdsv->vqs[0]));
+			pdsv->vqs[i].ready = false;
+		}
+	}
+
+	pds_vdpa_set_status(vdpa_dev, 0);
+
+	return 0;
+}
+
+static size_t pds_vdpa_get_config_size(struct vdpa_device *vdpa_dev)
+{
+	return sizeof(struct virtio_net_config);
+}
+
+static void pds_vdpa_get_config(struct vdpa_device *vdpa_dev,
+				unsigned int offset,
+				void *buf, unsigned int len)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+	void __iomem *device;
+
+	if (offset + len > sizeof(struct virtio_net_config)) {
+		WARN(true, "%s: bad read, offset %d len %d\n", __func__, offset, len);
+		return;
+	}
+
+	device = pdsv->vdpa_aux->vd_mdev.device;
+	memcpy_fromio(buf, device + offset, len);
+}
+
+static void pds_vdpa_set_config(struct vdpa_device *vdpa_dev,
+				unsigned int offset, const void *buf,
+				unsigned int len)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+	void __iomem *device;
+
+	if (offset + len > sizeof(struct virtio_net_config)) {
+		WARN(true, "%s: bad read, offset %d len %d\n", __func__, offset, len);
+		return;
+	}
+
+	device = pdsv->vdpa_aux->vd_mdev.device;
+	memcpy_toio(device + offset, buf, len);
+}
+
+static const struct vdpa_config_ops pds_vdpa_ops = {
+	.set_vq_address		= pds_vdpa_set_vq_address,
+	.set_vq_num		= pds_vdpa_set_vq_num,
+	.kick_vq		= pds_vdpa_kick_vq,
+	.set_vq_cb		= pds_vdpa_set_vq_cb,
+	.set_vq_ready		= pds_vdpa_set_vq_ready,
+	.get_vq_ready		= pds_vdpa_get_vq_ready,
+	.set_vq_state		= pds_vdpa_set_vq_state,
+	.get_vq_state		= pds_vdpa_get_vq_state,
+	.get_vq_notification	= pds_vdpa_get_vq_notification,
+	.get_vq_irq		= pds_vdpa_get_vq_irq,
+	.get_vq_align		= pds_vdpa_get_vq_align,
+	.get_vq_group		= pds_vdpa_get_vq_group,
+
+	.get_device_features	= pds_vdpa_get_device_features,
+	.set_driver_features	= pds_vdpa_set_driver_features,
+	.get_driver_features	= pds_vdpa_get_driver_features,
+	.set_config_cb		= pds_vdpa_set_config_cb,
+	.get_vq_num_max		= pds_vdpa_get_vq_num_max,
+	.get_device_id		= pds_vdpa_get_device_id,
+	.get_vendor_id		= pds_vdpa_get_vendor_id,
+	.get_status		= pds_vdpa_get_status,
+	.set_status		= pds_vdpa_set_status,
+	.reset			= pds_vdpa_reset,
+	.get_config_size	= pds_vdpa_get_config_size,
+	.get_config		= pds_vdpa_get_config,
+	.set_config		= pds_vdpa_set_config,
+};
+static struct virtio_device_id pds_vdpa_id_table[] = {
+	{VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID},
+	{0},
+};
+
+static int pds_vdpa_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
+			    const struct vdpa_dev_set_config *add_config)
+{
+	struct pds_vdpa_aux *vdpa_aux;
+	struct pds_vdpa_device *pdsv;
+	struct vdpa_mgmt_dev *mgmt;
+	u16 fw_max_vqs, vq_pairs;
+	struct device *dma_dev;
+	struct pci_dev *pdev;
+	struct device *dev;
+	u8 mac[ETH_ALEN];
+	int err;
+	int i;
+
+	vdpa_aux = container_of(mdev, struct pds_vdpa_aux, vdpa_mdev);
+	dev = &vdpa_aux->padev->aux_dev.dev;
+	mgmt = &vdpa_aux->vdpa_mdev;
+
+	if (vdpa_aux->pdsv) {
+		dev_warn(dev, "Multiple vDPA devices on a VF is not supported.\n");
+		return -EOPNOTSUPP;
+	}
+
+	pdsv = vdpa_alloc_device(struct pds_vdpa_device, vdpa_dev,
+				 dev, &pds_vdpa_ops, 1, 1, name, false);
+	if (IS_ERR(pdsv)) {
+		dev_err(dev, "Failed to allocate vDPA structure: %pe\n", pdsv);
+		return PTR_ERR(pdsv);
+	}
+
+	vdpa_aux->pdsv = pdsv;
+	pdsv->vdpa_aux = vdpa_aux;
+
+	pdev = vdpa_aux->padev->vf_pdev;
+	dma_dev = &pdev->dev;
+	pdsv->vdpa_dev.dma_dev = dma_dev;
+
+	pdsv->supported_features = mgmt->supported_features;
+
+	if (add_config->mask & BIT_ULL(VDPA_ATTR_DEV_FEATURES)) {
+		u64 unsupp_features =
+			add_config->device_features & ~mgmt->supported_features;
+
+		if (unsupp_features) {
+			dev_err(dev, "Unsupported features: %#llx\n", unsupp_features);
+			err = -EOPNOTSUPP;
+			goto err_unmap;
+		}
+
+		pdsv->supported_features = add_config->device_features;
+	}
+
+	err = pds_vdpa_cmd_reset(pdsv);
+	if (err) {
+		dev_err(dev, "Failed to reset hw: %pe\n", ERR_PTR(err));
+		goto err_unmap;
+	}
+
+	err = pds_vdpa_init_hw(pdsv);
+	if (err) {
+		dev_err(dev, "Failed to init hw: %pe\n", ERR_PTR(err));
+		goto err_unmap;
+	}
+
+	fw_max_vqs = le16_to_cpu(pdsv->vdpa_aux->ident.max_vqs);
+	vq_pairs = fw_max_vqs / 2;
+
+	/* Make sure we have the queues being requested */
+	if (add_config->mask & (1 << VDPA_ATTR_DEV_NET_CFG_MAX_VQP))
+		vq_pairs = add_config->net.max_vq_pairs;
+
+	pdsv->num_vqs = 2 * vq_pairs;
+	if (pdsv->supported_features & BIT_ULL(VIRTIO_NET_F_CTRL_VQ))
+		pdsv->num_vqs++;
+
+	if (pdsv->num_vqs > fw_max_vqs) {
+		dev_err(dev, "%s: queue count requested %u greater than max %u\n",
+			__func__, pdsv->num_vqs, fw_max_vqs);
+		err = -ENOSPC;
+		goto err_unmap;
+	}
+
+	if (pdsv->num_vqs != fw_max_vqs) {
+		err = pds_vdpa_cmd_set_max_vq_pairs(pdsv, vq_pairs);
+		if (err) {
+			dev_err(dev, "Failed to set max_vq_pairs: %pe\n",
+				ERR_PTR(err));
+			goto err_unmap;
+		}
+	}
+
+	/* Set a mac, either from the user config if provided
+	 * or set a random mac if default is 00:..:00
+	 */
+	if (add_config->mask & BIT_ULL(VDPA_ATTR_DEV_NET_CFG_MACADDR)) {
+		ether_addr_copy(mac, add_config->net.mac);
+		pds_vdpa_cmd_set_mac(pdsv, mac);
+	} else {
+		struct virtio_net_config __iomem *vc;
+
+		vc = pdsv->vdpa_aux->vd_mdev.device;
+		memcpy_fromio(mac, vc->mac, sizeof(mac));
+		if (is_zero_ether_addr(mac)) {
+			eth_random_addr(mac);
+			dev_info(dev, "setting random mac %pM\n", mac);
+			pds_vdpa_cmd_set_mac(pdsv, mac);
+		}
+	}
+
+	for (i = 0; i < pdsv->num_vqs; i++) {
+		pdsv->vqs[i].qid = i;
+		pdsv->vqs[i].pdsv = pdsv;
+		pdsv->vqs[i].irq = VIRTIO_MSI_NO_VECTOR;
+		pdsv->vqs[i].notify = vp_modern_map_vq_notify(&pdsv->vdpa_aux->vd_mdev,
+							      i, &pdsv->vqs[i].notify_pa);
+	}
+
+	pdsv->vdpa_dev.mdev = &vdpa_aux->vdpa_mdev;
+
+	err = pds_vdpa_register_event_handler(pdsv);
+	if (err) {
+		dev_err(dev, "Failed to register for PDS events: %pe\n", ERR_PTR(err));
+		goto err_unmap;
+	}
+
+	/* We use the _vdpa_register_device() call rather than the
+	 * vdpa_register_device() to avoid a deadlock because our
+	 * dev_add() is called with the vdpa_dev_lock already set
+	 * by vdpa_nl_cmd_dev_add_set_doit()
+	 */
+	err = _vdpa_register_device(&pdsv->vdpa_dev, pdsv->num_vqs);
+	if (err) {
+		dev_err(dev, "Failed to register to vDPA bus: %pe\n", ERR_PTR(err));
+		goto err_unevent;
+	}
+
+	pds_vdpa_debugfs_add_vdpadev(vdpa_aux);
+
+	return 0;
+
+err_unevent:
+	pds_vdpa_unregister_event_handler(pdsv);
+err_unmap:
+	put_device(&pdsv->vdpa_dev.dev);
+	vdpa_aux->pdsv = NULL;
+	return err;
+}
+
+static void pds_vdpa_dev_del(struct vdpa_mgmt_dev *mdev,
+			     struct vdpa_device *vdpa_dev)
+{
+	struct pds_vdpa_device *pdsv = vdpa_to_pdsv(vdpa_dev);
+	struct pds_vdpa_aux *vdpa_aux;
+
+	pds_vdpa_unregister_event_handler(pdsv);
+
+	vdpa_aux = container_of(mdev, struct pds_vdpa_aux, vdpa_mdev);
+	_vdpa_unregister_device(vdpa_dev);
+
+	pds_vdpa_cmd_reset(vdpa_aux->pdsv);
+	pds_vdpa_debugfs_reset_vdpadev(vdpa_aux);
+
+	vdpa_aux->pdsv = NULL;
+
+	dev_info(&vdpa_aux->padev->aux_dev.dev, "Removed vdpa device\n");
+}
+
+static const struct vdpa_mgmtdev_ops pds_vdpa_mgmt_dev_ops = {
+	.dev_add = pds_vdpa_dev_add,
+	.dev_del = pds_vdpa_dev_del
+};
+
+int pds_vdpa_get_mgmt_info(struct pds_vdpa_aux *vdpa_aux)
+{
+	union pds_core_adminq_cmd cmd = {
+		.vdpa_ident.opcode = PDS_VDPA_CMD_IDENT,
+		.vdpa_ident.vf_id = cpu_to_le16(vdpa_aux->vf_id),
+	};
+	union pds_core_adminq_comp comp = {};
+	struct vdpa_mgmt_dev *mgmt;
+	struct pci_dev *pf_pdev;
+	struct device *pf_dev;
+	struct pci_dev *pdev;
+	dma_addr_t ident_pa;
+	struct device *dev;
+	u16 dev_intrs;
+	u16 max_vqs;
+	int err;
+
+	dev = &vdpa_aux->padev->aux_dev.dev;
+	pdev = vdpa_aux->padev->vf_pdev;
+	mgmt = &vdpa_aux->vdpa_mdev;
+
+	/* Get resource info through the PF's adminq.  It is a block of info,
+	 * so we need to map some memory for PF to make available to the
+	 * firmware for writing the data.
+	 */
+	pf_pdev = pci_physfn(vdpa_aux->padev->vf_pdev);
+	pf_dev = &pf_pdev->dev;
+	ident_pa = dma_map_single(pf_dev, &vdpa_aux->ident,
+				  sizeof(vdpa_aux->ident), DMA_FROM_DEVICE);
+	if (dma_mapping_error(pf_dev, ident_pa)) {
+		dev_err(dev, "Failed to map ident space\n");
+		return -ENOMEM;
+	}
+
+	cmd.vdpa_ident.ident_pa = cpu_to_le64(ident_pa);
+	cmd.vdpa_ident.len = cpu_to_le32(sizeof(vdpa_aux->ident));
+	err = pds_client_adminq_cmd(vdpa_aux->padev, &cmd,
+				    sizeof(cmd.vdpa_ident), &comp, 0);
+	dma_unmap_single(pf_dev, ident_pa,
+			 sizeof(vdpa_aux->ident), DMA_FROM_DEVICE);
+	if (err) {
+		dev_err(dev, "Failed to ident hw, status %d: %pe\n",
+			comp.status, ERR_PTR(err));
+		return err;
+	}
+
+	max_vqs = le16_to_cpu(vdpa_aux->ident.max_vqs);
+	dev_intrs = pci_msix_vec_count(pdev);
+	dev_dbg(dev, "ident.max_vqs %d dev_intrs %d\n", max_vqs, dev_intrs);
+
+	max_vqs = min_t(u16, dev_intrs, max_vqs);
+	mgmt->max_supported_vqs = min_t(u16, PDS_VDPA_MAX_QUEUES, max_vqs);
+	vdpa_aux->nintrs = mgmt->max_supported_vqs;
+
+	mgmt->ops = &pds_vdpa_mgmt_dev_ops;
+	mgmt->id_table = pds_vdpa_id_table;
+	mgmt->device = dev;
+	mgmt->supported_features = le64_to_cpu(vdpa_aux->ident.hw_features);
+	mgmt->config_attr_mask = BIT_ULL(VDPA_ATTR_DEV_NET_CFG_MACADDR);
+	mgmt->config_attr_mask |= BIT_ULL(VDPA_ATTR_DEV_NET_CFG_MAX_VQP);
+	mgmt->config_attr_mask |= BIT_ULL(VDPA_ATTR_DEV_FEATURES);
+
+	err = pci_alloc_irq_vectors(pdev, vdpa_aux->nintrs, vdpa_aux->nintrs,
+				    PCI_IRQ_MSIX);
+	if (err < 0) {
+		dev_err(dev, "Couldn't get %d msix vectors: %pe\n",
+			vdpa_aux->nintrs, ERR_PTR(err));
+		return err;
+	}
+	vdpa_aux->nintrs = err;
+
+	return 0;
+}
diff --git a/drivers/vdpa/pds/vdpa_dev.h b/drivers/vdpa/pds/vdpa_dev.h
new file mode 100644
index 00000000000000..a1bc37de953746
--- /dev/null
+++ b/drivers/vdpa/pds/vdpa_dev.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright(c) 2023 Advanced Micro Devices, Inc */
+
+#ifndef _VDPA_DEV_H_
+#define _VDPA_DEV_H_
+
+#include <linux/pci.h>
+#include <linux/vdpa.h>
+
+struct pds_vdpa_vq_info {
+	bool ready;
+	u64 desc_addr;
+	u64 avail_addr;
+	u64 used_addr;
+	u32 q_len;
+	u16 qid;
+	int irq;
+	char irq_name[32];
+
+	void __iomem *notify;
+	dma_addr_t notify_pa;
+
+	u64 doorbell;
+	u16 avail_idx;
+	u16 used_idx;
+
+	struct vdpa_callback event_cb;
+	struct pds_vdpa_device *pdsv;
+};
+
+#define PDS_VDPA_MAX_QUEUES	65
+#define PDS_VDPA_MAX_QLEN	32768
+struct pds_vdpa_device {
+	struct vdpa_device vdpa_dev;
+	struct pds_vdpa_aux *vdpa_aux;
+
+	struct pds_vdpa_vq_info vqs[PDS_VDPA_MAX_QUEUES];
+	u64 supported_features;		/* specified device features */
+	u64 req_features;		/* features requested by vdpa */
+	u8 vdpa_index;			/* rsvd for future subdevice use */
+	u8 num_vqs;			/* num vqs in use */
+	struct vdpa_callback config_cb;
+	struct notifier_block nb;
+};
+
+#define PDS_VDPA_PACKED_INVERT_IDX	0x8000
+
+int pds_vdpa_get_mgmt_info(struct pds_vdpa_aux *vdpa_aux);
+#endif /* _VDPA_DEV_H_ */
diff --git a/drivers/vdpa/solidrun/snet_ctrl.c b/drivers/vdpa/solidrun/snet_ctrl.c
index 3858738643b407..3cef2571d15d3d 100644
--- a/drivers/vdpa/solidrun/snet_ctrl.c
+++ b/drivers/vdpa/solidrun/snet_ctrl.c
@@ -16,6 +16,7 @@ enum snet_ctrl_opcodes {
 	SNET_CTRL_OP_DESTROY = 1,
 	SNET_CTRL_OP_READ_VQ_STATE,
 	SNET_CTRL_OP_SUSPEND,
+	SNET_CTRL_OP_RESUME,
 };
 
 #define SNET_CTRL_TIMEOUT	        2000000
@@ -328,3 +329,8 @@ int snet_suspend_dev(struct snet *snet)
 {
 	return snet_send_ctrl_msg(snet, SNET_CTRL_OP_SUSPEND, 0);
 }
+
+int snet_resume_dev(struct snet *snet)
+{
+	return snet_send_ctrl_msg(snet, SNET_CTRL_OP_RESUME, 0);
+}
diff --git a/drivers/vdpa/solidrun/snet_hwmon.c b/drivers/vdpa/solidrun/snet_hwmon.c
index 42c87387a0f1a7..af531a3390824f 100644
--- a/drivers/vdpa/solidrun/snet_hwmon.c
+++ b/drivers/vdpa/solidrun/snet_hwmon.c
@@ -159,7 +159,7 @@ static const struct hwmon_ops snet_hwmon_ops = {
 	.read_string = snet_hwmon_read_string
 };
 
-static const struct hwmon_channel_info *snet_hwmon_info[] = {
+static const struct hwmon_channel_info * const snet_hwmon_info[] = {
 	HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_LABEL,
 			   HWMON_T_INPUT | HWMON_T_CRIT | HWMON_T_LABEL),
 	HWMON_CHANNEL_INFO(power, HWMON_P_INPUT | HWMON_P_LABEL),
diff --git a/drivers/vdpa/solidrun/snet_main.c b/drivers/vdpa/solidrun/snet_main.c
index cdcd84ce4f5a95..99428a04068d2d 100644
--- a/drivers/vdpa/solidrun/snet_main.c
+++ b/drivers/vdpa/solidrun/snet_main.c
@@ -509,6 +509,20 @@ static int snet_suspend(struct vdpa_device *vdev)
 	return ret;
 }
 
+static int snet_resume(struct vdpa_device *vdev)
+{
+	struct snet *snet = vdpa_to_snet(vdev);
+	int ret;
+
+	ret = snet_resume_dev(snet);
+	if (ret)
+		SNET_ERR(snet->pdev, "SNET[%u] resume failed, err: %d\n", snet->sid, ret);
+	else
+		SNET_DBG(snet->pdev, "Resume SNET[%u] device\n", snet->sid);
+
+	return ret;
+}
+
 static const struct vdpa_config_ops snet_config_ops = {
 	.set_vq_address         = snet_set_vq_address,
 	.set_vq_num             = snet_set_vq_num,
@@ -536,6 +550,7 @@ static const struct vdpa_config_ops snet_config_ops = {
 	.get_config             = snet_get_config,
 	.set_config             = snet_set_config,
 	.suspend		= snet_suspend,
+	.resume			= snet_resume,
 };
 
 static int psnet_open_pf_bar(struct pci_dev *pdev, struct psnet *psnet)
diff --git a/drivers/vdpa/solidrun/snet_vdpa.h b/drivers/vdpa/solidrun/snet_vdpa.h
index 3c78d4e7d48570..36ac285835ea85 100644
--- a/drivers/vdpa/solidrun/snet_vdpa.h
+++ b/drivers/vdpa/solidrun/snet_vdpa.h
@@ -204,5 +204,6 @@ void snet_ctrl_clear(struct snet *snet);
 int snet_destroy_dev(struct snet *snet);
 int snet_read_vq_state(struct snet *snet, u16 idx, struct vdpa_vq_state *state);
 int snet_suspend_dev(struct snet *snet);
+int snet_resume_dev(struct snet *snet);
 
 #endif //_SNET_VDPA_H_
diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index 4619b4a520efe5..dc38ed21319da9 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -726,7 +726,11 @@ static int vduse_vdpa_set_vq_affinity(struct vdpa_device *vdpa, u16 idx,
 {
 	struct vduse_dev *dev = vdpa_to_vduse(vdpa);
 
-	cpumask_copy(&dev->vqs[idx]->irq_affinity, cpu_mask);
+	if (cpu_mask)
+		cpumask_copy(&dev->vqs[idx]->irq_affinity, cpu_mask);
+	else
+		cpumask_setall(&dev->vqs[idx]->irq_affinity);
+
 	return 0;
 }