text: // 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_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 void ifcvf_free_irq_vectors(void *data)
  {
  	pci_free_irq_vectors(data);
  }
  
  static void ifcvf_free_irq(struct ifcvf_adapter *adapter, int queues)
  {
  	struct pci_dev *pdev = adapter->pdev;
  	struct ifcvf_hw *vf = &adapter->vf;
  	int i;
  
  
  	for (i = 0; i < queues; i++) {
  		devm_free_irq(&pdev->dev, vf->vring[i].irq, &vf->vring[i]);
  		vf->vring[i].irq = -EINVAL;
  	}
  
  	devm_free_irq(&pdev->dev, vf->config_irq, vf);
  	ifcvf_free_irq_vectors(pdev);
  }
  
  static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
  {
  	struct pci_dev *pdev = adapter->pdev;
  	struct ifcvf_hw *vf = &adapter->vf;
  	int vector, i, ret, irq;
  	u16 max_intr;
  
  	/* all queues and config interrupt  */
  	max_intr = vf->nr_vring + 1;
  
  	ret = pci_alloc_irq_vectors(pdev, max_intr,
  				    max_intr, PCI_IRQ_MSIX);
  	if (ret < 0) {
  		IFCVF_ERR(pdev, "Failed to alloc IRQ vectors\n");
  		return ret;
  	}
  
  	snprintf(vf->config_msix_name, 256, "ifcvf[%s]-config\n",
  		 pci_name(pdev));
  	vector = 0;
  	vf->config_irq = pci_irq_vector(pdev, 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");
  		return ret;
  	}
  
  	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 + IFCVF_MSI_QUEUE_OFF;
  		irq = pci_irq_vector(pdev, vector);
  		ret = devm_request_irq(&pdev->dev, irq,
  				       ifcvf_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);
  			ifcvf_free_irq(adapter, i);
  
  			return ret;
  		}
  
  		vf->vring[i].irq = irq;
  	}
  
  	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(adapter);
  		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(adapter, vf->nr_vring);
  	}
  
  	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 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 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);
  
  	return vf->vring[qid].irq;
  }
  
  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 does'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_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 pci_dev *pdev;
  	struct ifcvf_hw *vf;
  	struct device *dev;
  	int ret, i;
  
  	ifcvf_mgmt_dev = container_of(mdev, struct ifcvf_vdpa_mgmt_dev, mdev);
  	if (ifcvf_mgmt_dev->adapter)
  		return -EOPNOTSUPP;
  
  	pdev = ifcvf_mgmt_dev->pdev;
  	dev = &pdev->dev;
  	adapter = vdpa_alloc_device(struct ifcvf_adapter, vdpa,
  				    dev, &ifc_vdpa_ops, name, false);
  	if (IS_ERR(adapter)) {
  		IFCVF_ERR(pdev, "Failed to allocate vDPA structure");
  		return PTR_ERR(adapter);
  	}
  
  	ifcvf_mgmt_dev->adapter = adapter;
  	pci_set_drvdata(pdev, ifcvf_mgmt_dev);
  
  	vf = &adapter->vf;
  	vf->dev_type = get_dev_type(pdev);
  	vf->base = pcim_iomap_table(pdev);
  
  	adapter->pdev = pdev;
  	adapter->vdpa.dma_dev = &pdev->dev;
  
  	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);
  
  	adapter->vdpa.mdev = &ifcvf_mgmt_dev->mdev;
  	ret = _vdpa_register_device(&adapter->vdpa, vf->nr_vring);
  	if (ret) {
  		IFCVF_ERR(pdev, "Failed to register to vDPA bus");
  		goto err;
  	}
  
  	return 0;
  
  err:
  	put_device(&adapter->vdpa.dev);
  	return ret;
  }
  
  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;
  	u32 dev_type;
  	int ret;
  
  	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;
  	}
  
  	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->pdev = pdev;
  
  	ret = pcim_enable_device(pdev);
  	if (ret) {
  		IFCVF_ERR(pdev, "Failed to enable device\n");
  		goto err;
  	}
  
  	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");
  		goto err;
  	}
  
  	ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64));
  	if (ret) {
  		IFCVF_ERR(pdev, "No usable DMA configuration\n");
  		goto err;
  	}
  
  	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");
  		goto err;
  	}
  
  	pci_set_master(pdev);
  
  	ret = vdpa_mgmtdev_register(&ifcvf_mgmt_dev->mdev);
  	if (ret) {
  		IFCVF_ERR(pdev,
  			  "Failed to initialize the management interfaces\n");
  		goto err;
  	}
  
  	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");
  