vfio/migration: Modify the vf id acquisition method

driver inclusion
category:feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I6DRLU
CVE: NA

When using the old PCI_FUNC method to obtain the vf id, if the number
of vf big than 8, the obtained id number will be wrong, and the new
method needs to be used to correct it.
Signed-off-by: NLongfang Liu <liulongfang@huawei.com>
Signed-off-by: NJiangShui Yang <yangjiangshui@h-partners.com>

drivers/crypto/hisilicon/migration/acc_vf_migration.c

@@ -1610,6 +1610,19 @@ static int acc_vf_dev_init(struct pci_dev *pdev, struct hisi_qm *pf_qm,
 	return -ENOMEM;
 }
 
+static int hisi_acc_get_vf_id(struct pci_dev *dev)
+{
+	struct pci_dev *pf;
+
+	if (!dev->is_virtfn)
+		return -EINVAL;
+
+	pf = pci_physfn(dev);
+	return (((dev->bus->number << 8) + dev->devfn) -
+		((pf->bus->number << 8) + pf->devfn + pf->sriov->offset)) /
+	       pf->sriov->stride;
+}
+
 static void *acc_vf_probe(struct pci_dev *pdev)
 {
 	struct acc_vf_migration *acc_vf_dev;
@@ -1635,7 +1648,7 @@ static void *acc_vf_probe(struct pci_dev *pdev)
 		return ERR_PTR(-EINVAL);
 	}
 
-	vf_id = PCI_FUNC(vf_dev->devfn);
+	vf_id = hisi_acc_get_vf_id(vf_dev);
 	if (vf_id < 0) {
 		dev_info(&pdev->dev, "vf device: %s, vf id: %d\n",
 			 pf_qm->dev_name, vf_id);
@@ -1652,7 +1665,7 @@ static void *acc_vf_probe(struct pci_dev *pdev)
 		return ERR_PTR(-ENOMEM);
 	}
 
-	acc_vf_dev->vf_id = vf_id;
+	acc_vf_dev->vf_id = vf_id + 1;
 	acc_vf_dev->vf_vendor = pdev->vendor;
 	acc_vf_dev->vf_device = pdev->device;
 	acc_vf_dev->pf_dev = pf_dev;

drivers/crypto/hisilicon/migration/acc_vf_migration.h

@@ -215,6 +215,32 @@ struct acc_vf_region_ops {
 			   struct vfio_info_cap *caps);
 };
 
+/* Single Root I/O Virtualization */
+struct pci_sriov {
+	int		pos;		/* Capability position */
+	int		nres;		/* Number of resources */
+	u32		cap;		/* SR-IOV Capabilities */
+	u16		ctrl;		/* SR-IOV Control */
+	u16		total_VFs;	/* Total VFs associated with the PF */
+	u16		initial_VFs;	/* Initial VFs associated with the PF */
+	u16		num_VFs;	/* Number of VFs available */
+	u16		offset;		/* First VF Routing ID offset */
+	u16		stride;		/* Following VF stride */
+	u16		vf_device;	/* VF device ID */
+	u32		pgsz;		/* Page size for BAR alignment */
+	u8		link;		/* Function Dependency Link */
+	u8		max_VF_buses;	/* Max buses consumed by VFs */
+	u16		driver_max_VFs;	/* Max num VFs driver supports */
+	struct pci_dev	*dev;		/* Lowest numbered PF */
+	struct pci_dev	*self;		/* This PF */
+	u32		class;		/* VF device */
+	u8		hdr_type;	/* VF header type */
+	u16		subsystem_vendor; /* VF subsystem vendor */
+	u16		subsystem_device; /* VF subsystem device */
+	resource_size_t	barsz[PCI_SRIOV_NUM_BARS];	/* VF BAR size */
+	bool		drivers_autoprobe; /* Auto probing of VFs by driver */
+};
+
 struct acc_vf_region {
 	u32				type;
 	u32				subtype;