--- zzzz-none-000/linux-3.10.107/drivers/pci/iov.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/pci/iov.c	2021-02-04 17:41:59.000000000 +0000
@@ -19,16 +19,64 @@
 
 #define VIRTFN_ID_LEN	16
 
-static inline u8 virtfn_bus(struct pci_dev *dev, int id)
+int pci_iov_virtfn_bus(struct pci_dev *dev, int vf_id)
 {
+	if (!dev->is_physfn)
+		return -EINVAL;
 	return dev->bus->number + ((dev->devfn + dev->sriov->offset +
-				    dev->sriov->stride * id) >> 8);
+				    dev->sriov->stride * vf_id) >> 8);
 }
 
-static inline u8 virtfn_devfn(struct pci_dev *dev, int id)
+int pci_iov_virtfn_devfn(struct pci_dev *dev, int vf_id)
 {
+	if (!dev->is_physfn)
+		return -EINVAL;
 	return (dev->devfn + dev->sriov->offset +
-		dev->sriov->stride * id) & 0xff;
+		dev->sriov->stride * vf_id) & 0xff;
+}
+
+/*
+ * Per SR-IOV spec sec 3.3.10 and 3.3.11, First VF Offset and VF Stride may
+ * change when NumVFs changes.
+ *
+ * Update iov->offset and iov->stride when NumVFs is written.
+ */
+static inline void pci_iov_set_numvfs(struct pci_dev *dev, int nr_virtfn)
+{
+	struct pci_sriov *iov = dev->sriov;
+
+	pci_write_config_word(dev, iov->pos + PCI_SRIOV_NUM_VF, nr_virtfn);
+	pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_OFFSET, &iov->offset);
+	pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_STRIDE, &iov->stride);
+}
+
+/*
+ * The PF consumes one bus number.  NumVFs, First VF Offset, and VF Stride
+ * determine how many additional bus numbers will be consumed by VFs.
+ *
+ * Iterate over all valid NumVFs, validate offset and stride, and calculate
+ * the maximum number of bus numbers that could ever be required.
+ */
+static int compute_max_vf_buses(struct pci_dev *dev)
+{
+	struct pci_sriov *iov = dev->sriov;
+	int nr_virtfn, busnr, rc = 0;
+
+	for (nr_virtfn = iov->total_VFs; nr_virtfn; nr_virtfn--) {
+		pci_iov_set_numvfs(dev, nr_virtfn);
+		if (!iov->offset || (nr_virtfn > 1 && !iov->stride)) {
+			rc = -EIO;
+			goto out;
+		}
+
+		busnr = pci_iov_virtfn_bus(dev, nr_virtfn - 1);
+		if (busnr > iov->max_VF_buses)
+			iov->max_VF_buses = busnr;
+	}
+
+out:
+	pci_iov_set_numvfs(dev, 0);
+	return rc;
 }
 
 static struct pci_bus *virtfn_add_bus(struct pci_bus *bus, int busnr)
@@ -47,62 +95,60 @@
 		return NULL;
 
 	pci_bus_insert_busn_res(child, busnr, busnr);
-	bus->is_added = 1;
 
 	return child;
 }
 
-static void virtfn_remove_bus(struct pci_bus *bus, int busnr)
+static void virtfn_remove_bus(struct pci_bus *physbus, struct pci_bus *virtbus)
 {
-	struct pci_bus *child;
-
-	if (bus->number == busnr)
-		return;
+	if (physbus != virtbus && list_empty(&virtbus->devices))
+		pci_remove_bus(virtbus);
+}
 
-	child = pci_find_bus(pci_domain_nr(bus), busnr);
-	BUG_ON(!child);
+resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
+{
+	if (!dev->is_physfn)
+		return 0;
 
-	if (list_empty(&child->devices))
-		pci_remove_bus(child);
+	return dev->sriov->barsz[resno - PCI_IOV_RESOURCES];
 }
 
 static int virtfn_add(struct pci_dev *dev, int id, int reset)
 {
 	int i;
-	int rc;
+	int rc = -ENOMEM;
 	u64 size;
 	char buf[VIRTFN_ID_LEN];
 	struct pci_dev *virtfn;
 	struct resource *res;
 	struct pci_sriov *iov = dev->sriov;
+	struct pci_bus *bus;
 
-	virtfn = alloc_pci_dev();
+	mutex_lock(&iov->dev->sriov->lock);
+	bus = virtfn_add_bus(dev->bus, pci_iov_virtfn_bus(dev, id));
+	if (!bus)
+		goto failed;
+
+	virtfn = pci_alloc_dev(bus);
 	if (!virtfn)
-		return -ENOMEM;
+		goto failed0;
 
-	mutex_lock(&iov->dev->sriov->lock);
-	virtfn->bus = virtfn_add_bus(dev->bus, virtfn_bus(dev, id));
-	if (!virtfn->bus) {
-		kfree(virtfn);
-		mutex_unlock(&iov->dev->sriov->lock);
-		return -ENOMEM;
-	}
-	virtfn->devfn = virtfn_devfn(dev, id);
+	virtfn->devfn = pci_iov_virtfn_devfn(dev, id);
 	virtfn->vendor = dev->vendor;
 	pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_DID, &virtfn->device);
 	pci_setup_device(virtfn);
 	virtfn->dev.parent = dev->dev.parent;
 	virtfn->physfn = pci_dev_get(dev);
 	virtfn->is_virtfn = 1;
+	virtfn->multifunction = 0;
 
 	for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
-		res = dev->resource + PCI_IOV_RESOURCES + i;
+		res = &dev->resource[i + PCI_IOV_RESOURCES];
 		if (!res->parent)
 			continue;
 		virtfn->resource[i].name = pci_name(virtfn);
 		virtfn->resource[i].flags = res->flags;
-		size = resource_size(res);
-		do_div(size, iov->total_VFs);
+		size = pci_iov_resource_size(dev, i + PCI_IOV_RESOURCES);
 		virtfn->resource[i].start = res->start + size * id;
 		virtfn->resource[i].end = virtfn->resource[i].start + size - 1;
 		rc = request_resource(res, &virtfn->resource[i]);
@@ -115,7 +161,7 @@
 	pci_device_add(virtfn, virtfn->bus);
 	mutex_unlock(&iov->dev->sriov->lock);
 
-	rc = pci_bus_add_device(virtfn);
+	pci_bus_add_device(virtfn);
 	sprintf(buf, "virtfn%u", id);
 	rc = sysfs_create_link(&dev->dev.kobj, &virtfn->dev.kobj, buf);
 	if (rc)
@@ -134,7 +180,9 @@
 	pci_dev_put(dev);
 	mutex_lock(&iov->dev->sriov->lock);
 	pci_stop_and_remove_bus_device(virtfn);
-	virtfn_remove_bus(dev->bus, virtfn_bus(dev, id));
+failed0:
+	virtfn_remove_bus(dev->bus, bus);
+failed:
 	mutex_unlock(&iov->dev->sriov->lock);
 
 	return rc;
@@ -143,20 +191,15 @@
 static void virtfn_remove(struct pci_dev *dev, int id, int reset)
 {
 	char buf[VIRTFN_ID_LEN];
-	struct pci_bus *bus;
 	struct pci_dev *virtfn;
 	struct pci_sriov *iov = dev->sriov;
 
-	bus = pci_find_bus(pci_domain_nr(dev->bus), virtfn_bus(dev, id));
-	if (!bus)
-		return;
-
-	virtfn = pci_get_slot(bus, virtfn_devfn(dev, id));
+	virtfn = pci_get_domain_bus_and_slot(pci_domain_nr(dev->bus),
+					     pci_iov_virtfn_bus(dev, id),
+					     pci_iov_virtfn_devfn(dev, id));
 	if (!virtfn)
 		return;
 
-	pci_dev_put(virtfn);
-
 	if (reset) {
 		device_release_driver(&virtfn->dev);
 		__pci_reset_function(virtfn);
@@ -174,113 +217,35 @@
 
 	mutex_lock(&iov->dev->sriov->lock);
 	pci_stop_and_remove_bus_device(virtfn);
-	virtfn_remove_bus(dev->bus, virtfn_bus(dev, id));
+	virtfn_remove_bus(dev->bus, virtfn->bus);
 	mutex_unlock(&iov->dev->sriov->lock);
 
+	/* balance pci_get_domain_bus_and_slot() */
+	pci_dev_put(virtfn);
 	pci_dev_put(dev);
 }
 
-static int sriov_migration(struct pci_dev *dev)
-{
-	u16 status;
-	struct pci_sriov *iov = dev->sriov;
-
-	if (!iov->num_VFs)
-		return 0;
-
-	if (!(iov->cap & PCI_SRIOV_CAP_VFM))
-		return 0;
-
-	pci_read_config_word(dev, iov->pos + PCI_SRIOV_STATUS, &status);
-	if (!(status & PCI_SRIOV_STATUS_VFM))
-		return 0;
-
-	schedule_work(&iov->mtask);
-
-	return 1;
-}
-
-static void sriov_migration_task(struct work_struct *work)
+int __weak pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
 {
-	int i;
-	u8 state;
-	u16 status;
-	struct pci_sriov *iov = container_of(work, struct pci_sriov, mtask);
-
-	for (i = iov->initial_VFs; i < iov->num_VFs; i++) {
-		state = readb(iov->mstate + i);
-		if (state == PCI_SRIOV_VFM_MI) {
-			writeb(PCI_SRIOV_VFM_AV, iov->mstate + i);
-			state = readb(iov->mstate + i);
-			if (state == PCI_SRIOV_VFM_AV)
-				virtfn_add(iov->self, i, 1);
-		} else if (state == PCI_SRIOV_VFM_MO) {
-			virtfn_remove(iov->self, i, 1);
-			writeb(PCI_SRIOV_VFM_UA, iov->mstate + i);
-			state = readb(iov->mstate + i);
-			if (state == PCI_SRIOV_VFM_AV)
-				virtfn_add(iov->self, i, 0);
-		}
-	}
-
-	pci_read_config_word(iov->self, iov->pos + PCI_SRIOV_STATUS, &status);
-	status &= ~PCI_SRIOV_STATUS_VFM;
-	pci_write_config_word(iov->self, iov->pos + PCI_SRIOV_STATUS, status);
-}
-
-static int sriov_enable_migration(struct pci_dev *dev, int nr_virtfn)
-{
-	int bir;
-	u32 table;
-	resource_size_t pa;
-	struct pci_sriov *iov = dev->sriov;
-
-	if (nr_virtfn <= iov->initial_VFs)
-		return 0;
-
-	pci_read_config_dword(dev, iov->pos + PCI_SRIOV_VFM, &table);
-	bir = PCI_SRIOV_VFM_BIR(table);
-	if (bir > PCI_STD_RESOURCE_END)
-		return -EIO;
-
-	table = PCI_SRIOV_VFM_OFFSET(table);
-	if (table + nr_virtfn > pci_resource_len(dev, bir))
-		return -EIO;
-
-	pa = pci_resource_start(dev, bir) + table;
-	iov->mstate = ioremap(pa, nr_virtfn);
-	if (!iov->mstate)
-		return -ENOMEM;
-
-	INIT_WORK(&iov->mtask, sriov_migration_task);
-
-	iov->ctrl |= PCI_SRIOV_CTRL_VFM | PCI_SRIOV_CTRL_INTR;
-	pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
-
 	return 0;
 }
 
-static void sriov_disable_migration(struct pci_dev *dev)
+int __weak pcibios_sriov_disable(struct pci_dev *pdev)
 {
-	struct pci_sriov *iov = dev->sriov;
-
-	iov->ctrl &= ~(PCI_SRIOV_CTRL_VFM | PCI_SRIOV_CTRL_INTR);
-	pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
-
-	cancel_work_sync(&iov->mtask);
-	iounmap(iov->mstate);
+	return 0;
 }
 
 static int sriov_enable(struct pci_dev *dev, int nr_virtfn)
 {
 	int rc;
-	int i, j;
+	int i;
 	int nres;
-	u16 offset, stride, initial;
+	u16 initial;
 	struct resource *res;
 	struct pci_dev *pdev;
 	struct pci_sriov *iov = dev->sriov;
 	int bars = 0;
+	int bus;
 
 	if (!nr_virtfn)
 		return 0;
@@ -297,16 +262,10 @@
 	    (!(iov->cap & PCI_SRIOV_CAP_VFM) && (nr_virtfn > initial)))
 		return -EINVAL;
 
-	pci_write_config_word(dev, iov->pos + PCI_SRIOV_NUM_VF, nr_virtfn);
-	pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_OFFSET, &offset);
-	pci_read_config_word(dev, iov->pos + PCI_SRIOV_VF_STRIDE, &stride);
-	if (!offset || (nr_virtfn > 1 && !stride))
-		return -EIO;
-
 	nres = 0;
 	for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
 		bars |= (1 << (i + PCI_IOV_RESOURCES));
-		res = dev->resource + PCI_IOV_RESOURCES + i;
+		res = &dev->resource[i + PCI_IOV_RESOURCES];
 		if (res->parent)
 			nres++;
 	}
@@ -315,11 +274,10 @@
 		return -ENOMEM;
 	}
 
-	iov->offset = offset;
-	iov->stride = stride;
-
-	if (virtfn_bus(dev, nr_virtfn - 1) > dev->bus->busn_res.end) {
-		dev_err(&dev->dev, "SR-IOV: bus number out of range\n");
+	bus = pci_iov_virtfn_bus(dev, nr_virtfn - 1);
+	if (bus > dev->bus->busn_res.end) {
+		dev_err(&dev->dev, "can't enable %d VFs (bus %02x out of range of %pR)\n",
+			nr_virtfn, bus, &dev->bus->busn_res);
 		return -ENOMEM;
 	}
 
@@ -333,48 +291,52 @@
 		if (!pdev)
 			return -ENODEV;
 
-		pci_dev_put(pdev);
-
-		if (!pdev->is_physfn)
-			return -ENODEV;
+		if (!pdev->is_physfn) {
+			pci_dev_put(pdev);
+			return -ENOSYS;
+		}
 
 		rc = sysfs_create_link(&dev->dev.kobj,
 					&pdev->dev.kobj, "dep_link");
+		pci_dev_put(pdev);
 		if (rc)
 			return rc;
 	}
 
+	iov->initial_VFs = initial;
+	if (nr_virtfn < initial)
+		initial = nr_virtfn;
+
+	rc = pcibios_sriov_enable(dev, initial);
+	if (rc) {
+		dev_err(&dev->dev, "failure %d from pcibios_sriov_enable()\n", rc);
+		goto err_pcibios;
+	}
+
+	pci_iov_set_numvfs(dev, nr_virtfn);
 	iov->ctrl |= PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE;
 	pci_cfg_access_lock(dev);
 	pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
 	msleep(100);
 	pci_cfg_access_unlock(dev);
 
-	iov->initial_VFs = initial;
-	if (nr_virtfn < initial)
-		initial = nr_virtfn;
-
 	for (i = 0; i < initial; i++) {
 		rc = virtfn_add(dev, i, 0);
 		if (rc)
 			goto failed;
 	}
 
-	if (iov->cap & PCI_SRIOV_CAP_VFM) {
-		rc = sriov_enable_migration(dev, nr_virtfn);
-		if (rc)
-			goto failed;
-	}
-
 	kobject_uevent(&dev->dev.kobj, KOBJ_CHANGE);
 	iov->num_VFs = nr_virtfn;
 
 	return 0;
 
 failed:
-	for (j = 0; j < i; j++)
-		virtfn_remove(dev, j, 0);
+	while (i--)
+		virtfn_remove(dev, i, 0);
 
+	pcibios_sriov_disable(dev);
+err_pcibios:
 	iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE);
 	pci_cfg_access_lock(dev);
 	pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
@@ -384,6 +346,7 @@
 	if (iov->link != dev->devfn)
 		sysfs_remove_link(&dev->dev.kobj, "dep_link");
 
+	pci_iov_set_numvfs(dev, 0);
 	return rc;
 }
 
@@ -395,12 +358,11 @@
 	if (!iov->num_VFs)
 		return;
 
-	if (iov->cap & PCI_SRIOV_CAP_VFM)
-		sriov_disable_migration(dev);
-
 	for (i = 0; i < iov->num_VFs; i++)
 		virtfn_remove(dev, i, 0);
 
+	pcibios_sriov_disable(dev);
+
 	iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE);
 	pci_cfg_access_lock(dev);
 	pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
@@ -411,15 +373,16 @@
 		sysfs_remove_link(&dev->dev.kobj, "dep_link");
 
 	iov->num_VFs = 0;
+	pci_iov_set_numvfs(dev, 0);
 }
 
 static int sriov_init(struct pci_dev *dev, int pos)
 {
-	int i;
+	int i, bar64;
 	int rc;
 	int nres;
 	u32 pgsz;
-	u16 ctrl, total, offset, stride;
+	u16 ctrl, total;
 	struct pci_sriov *iov;
 	struct resource *res;
 	struct pci_dev *pdev;
@@ -434,10 +397,6 @@
 		ssleep(1);
 	}
 
-	pci_read_config_word(dev, pos + PCI_SRIOV_TOTAL_VF, &total);
-	if (!total)
-		return 0;
-
 	ctrl = 0;
 	list_for_each_entry(pdev, &dev->bus->devices, bus_list)
 		if (pdev->is_physfn)
@@ -449,10 +408,10 @@
 
 found:
 	pci_write_config_word(dev, pos + PCI_SRIOV_CTRL, ctrl);
-	pci_read_config_word(dev, pos + PCI_SRIOV_VF_OFFSET, &offset);
-	pci_read_config_word(dev, pos + PCI_SRIOV_VF_STRIDE, &stride);
-	if (!offset || (total > 1 && !stride))
-		return -EIO;
+
+	pci_read_config_word(dev, pos + PCI_SRIOV_TOTAL_VF, &total);
+	if (!total)
+		return 0;
 
 	pci_read_config_dword(dev, pos + PCI_SRIOV_SUP_PGSIZE, &pgsz);
 	i = PAGE_SHIFT > 12 ? PAGE_SHIFT - 12 : 0;
@@ -463,33 +422,40 @@
 	pgsz &= ~(pgsz - 1);
 	pci_write_config_dword(dev, pos + PCI_SRIOV_SYS_PGSIZE, pgsz);
 
+	iov = kzalloc(sizeof(*iov), GFP_KERNEL);
+	if (!iov)
+		return -ENOMEM;
+
 	nres = 0;
 	for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
-		res = dev->resource + PCI_IOV_RESOURCES + i;
-		i += __pci_read_base(dev, pci_bar_unknown, res,
-				     pos + PCI_SRIOV_BAR + i * 4);
+		res = &dev->resource[i + PCI_IOV_RESOURCES];
+		/*
+		 * If it is already FIXED, don't change it, something
+		 * (perhaps EA or header fixups) wants it this way.
+		 */
+		if (res->flags & IORESOURCE_PCI_FIXED)
+			bar64 = (res->flags & IORESOURCE_MEM_64) ? 1 : 0;
+		else
+			bar64 = __pci_read_base(dev, pci_bar_unknown, res,
+						pos + PCI_SRIOV_BAR + i * 4);
 		if (!res->flags)
 			continue;
 		if (resource_size(res) & (PAGE_SIZE - 1)) {
 			rc = -EIO;
 			goto failed;
 		}
+		iov->barsz[i] = resource_size(res);
 		res->end = res->start + resource_size(res) * total - 1;
+		dev_info(&dev->dev, "VF(n) BAR%d space: %pR (contains BAR%d for %d VFs)\n",
+			 i, res, i, total);
+		i += bar64;
 		nres++;
 	}
 
-	iov = kzalloc(sizeof(*iov), GFP_KERNEL);
-	if (!iov) {
-		rc = -ENOMEM;
-		goto failed;
-	}
-
 	iov->pos = pos;
 	iov->nres = nres;
 	iov->ctrl = ctrl;
 	iov->total_VFs = total;
-	iov->offset = offset;
-	iov->stride = stride;
 	iov->pgsz = pgsz;
 	iov->self = dev;
 	pci_read_config_dword(dev, pos + PCI_SRIOV_CAP, &iov->cap);
@@ -506,15 +472,22 @@
 
 	dev->sriov = iov;
 	dev->is_physfn = 1;
+	rc = compute_max_vf_buses(dev);
+	if (rc)
+		goto fail_max_buses;
 
 	return 0;
 
+fail_max_buses:
+	dev->sriov = NULL;
+	dev->is_physfn = 0;
 failed:
 	for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
-		res = dev->resource + PCI_IOV_RESOURCES + i;
+		res = &dev->resource[i + PCI_IOV_RESOURCES];
 		res->flags = 0;
 	}
 
+	kfree(iov);
 	return rc;
 }
 
@@ -545,7 +518,7 @@
 		pci_update_resource(dev, i);
 
 	pci_write_config_dword(dev, iov->pos + PCI_SRIOV_SYS_PGSIZE, iov->pgsz);
-	pci_write_config_word(dev, iov->pos + PCI_SRIOV_NUM_VF, iov->num_VFs);
+	pci_iov_set_numvfs(dev, iov->num_VFs);
 	pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl);
 	if (iov->ctrl & PCI_SRIOV_CTRL_VFE)
 		msleep(100);
@@ -582,25 +555,67 @@
 }
 
 /**
- * pci_iov_resource_bar - get position of the SR-IOV BAR
+ * pci_iov_update_resource - update a VF BAR
  * @dev: the PCI device
  * @resno: the resource number
- * @type: the BAR type to be filled in
  *
- * Returns position of the BAR encapsulated in the SR-IOV capability.
+ * Update a VF BAR in the SR-IOV capability of a PF.
  */
-int pci_iov_resource_bar(struct pci_dev *dev, int resno,
-			 enum pci_bar_type *type)
+void pci_iov_update_resource(struct pci_dev *dev, int resno)
 {
-	if (resno < PCI_IOV_RESOURCES || resno > PCI_IOV_RESOURCE_END)
-		return 0;
+	struct pci_sriov *iov = dev->is_physfn ? dev->sriov : NULL;
+	struct resource *res = dev->resource + resno;
+	int vf_bar = resno - PCI_IOV_RESOURCES;
+	struct pci_bus_region region;
+	u16 cmd;
+	u32 new;
+	int reg;
+
+	/*
+	 * The generic pci_restore_bars() path calls this for all devices,
+	 * including VFs and non-SR-IOV devices.  If this is not a PF, we
+	 * have nothing to do.
+	 */
+	if (!iov)
+		return;
 
-	BUG_ON(!dev->is_physfn);
+	pci_read_config_word(dev, iov->pos + PCI_SRIOV_CTRL, &cmd);
+	if ((cmd & PCI_SRIOV_CTRL_VFE) && (cmd & PCI_SRIOV_CTRL_MSE)) {
+		dev_WARN(&dev->dev, "can't update enabled VF BAR%d %pR\n",
+			 vf_bar, res);
+		return;
+	}
 
-	*type = pci_bar_unknown;
+	/*
+	 * Ignore unimplemented BARs, unused resource slots for 64-bit
+	 * BARs, and non-movable resources, e.g., those described via
+	 * Enhanced Allocation.
+	 */
+	if (!res->flags)
+		return;
+
+	if (res->flags & IORESOURCE_UNSET)
+		return;
+
+	if (res->flags & IORESOURCE_PCI_FIXED)
+		return;
 
-	return dev->sriov->pos + PCI_SRIOV_BAR +
-		4 * (resno - PCI_IOV_RESOURCES);
+	pcibios_resource_to_bus(dev->bus, &region, res);
+	new = region.start;
+	new |= res->flags & ~PCI_BASE_ADDRESS_MEM_MASK;
+
+	reg = iov->pos + PCI_SRIOV_BAR + 4 * vf_bar;
+	pci_write_config_dword(dev, reg, new);
+	if (res->flags & IORESOURCE_MEM_64) {
+		new = region.start >> 16 >> 16;
+		pci_write_config_dword(dev, reg + 4, new);
+	}
+}
+
+resource_size_t __weak pcibios_iov_resource_alignment(struct pci_dev *dev,
+						      int resno)
+{
+	return pci_iov_resource_size(dev, resno);
 }
 
 /**
@@ -615,15 +630,7 @@
  */
 resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno)
 {
-	struct resource tmp;
-	enum pci_bar_type type;
-	int reg = pci_iov_resource_bar(dev, resno, &type);
-	
-	if (!reg)
-		return 0;
-
-	 __pci_read_base(dev, type, &tmp, reg);
-	return resource_alignment(&tmp);
+	return pcibios_iov_resource_alignment(dev, resno);
 }
 
 /**
@@ -646,15 +653,13 @@
 int pci_iov_bus_range(struct pci_bus *bus)
 {
 	int max = 0;
-	u8 busnr;
 	struct pci_dev *dev;
 
 	list_for_each_entry(dev, &bus->devices, bus_list) {
 		if (!dev->is_physfn)
 			continue;
-		busnr = virtfn_bus(dev, dev->sriov->total_VFs - 1);
-		if (busnr > max)
-			max = busnr;
+		if (dev->sriov->max_VF_buses > max)
+			max = dev->sriov->max_VF_buses;
 	}
 
 	return max ? max - bus->number : 0;
@@ -672,7 +677,7 @@
 	might_sleep();
 
 	if (!dev->is_physfn)
-		return -ENODEV;
+		return -ENOSYS;
 
 	return sriov_enable(dev, nr_virtfn);
 }
@@ -694,25 +699,6 @@
 EXPORT_SYMBOL_GPL(pci_disable_sriov);
 
 /**
- * pci_sriov_migration - notify SR-IOV core of Virtual Function Migration
- * @dev: the PCI device
- *
- * Returns IRQ_HANDLED if the IRQ is handled, or IRQ_NONE if not.
- *
- * Physical Function driver is responsible to register IRQ handler using
- * VF Migration Interrupt Message Number, and call this function when the
- * interrupt is generated by the hardware.
- */
-irqreturn_t pci_sriov_migration(struct pci_dev *dev)
-{
-	if (!dev->is_physfn)
-		return IRQ_NONE;
-
-	return sriov_migration(dev) ? IRQ_HANDLED : IRQ_NONE;
-}
-EXPORT_SYMBOL_GPL(pci_sriov_migration);
-
-/**
  * pci_num_vf - return number of VFs associated with a PF device_release_driver
  * @dev: the PCI device
  *
@@ -732,7 +718,7 @@
  * @dev: the PCI device
  *
  * Returns number of VFs belonging to this device that are assigned to a guest.
- * If device is not a physical function returns -ENODEV.
+ * If device is not a physical function returns 0.
  */
 int pci_vfs_assigned(struct pci_dev *dev)
 {
@@ -758,7 +744,7 @@
 		 * our dev as the physical function and the assigned bit is set
 		 */
 		if (vfdev->is_virtfn && (vfdev->physfn == dev) &&
-		    (vfdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED))
+			pci_is_dev_assigned(vfdev))
 			vfs_assigned++;
 
 		vfdev = pci_get_device(dev->vendor, dev_id, vfdev);
@@ -777,12 +763,15 @@
  * device's mutex held.
  *
  * Returns 0 if PF is an SRIOV-capable device and
- * value of numvfs valid. If not a PF with VFS, return -EINVAL;
+ * value of numvfs valid. If not a PF return -ENOSYS;
+ * if numvfs is invalid return -EINVAL;
  * if VFs already enabled, return -EBUSY.
  */
 int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
 {
-	if (!dev->is_physfn || (numvfs > dev->sriov->total_VFs))
+	if (!dev->is_physfn)
+		return -ENOSYS;
+	if (numvfs > dev->sriov->total_VFs)
 		return -EINVAL;
 
 	/* Shouldn't change if VFs already enabled */
@@ -796,17 +785,17 @@
 EXPORT_SYMBOL_GPL(pci_sriov_set_totalvfs);
 
 /**
- * pci_sriov_get_totalvfs -- get total VFs supported on this devic3
+ * pci_sriov_get_totalvfs -- get total VFs supported on this device
  * @dev: the PCI PF device
  *
  * For a PCIe device with SRIOV support, return the PCIe
  * SRIOV capability value of TotalVFs or the value of driver_max_VFs
- * if the driver reduced it.  Otherwise, -EINVAL.
+ * if the driver reduced it.  Otherwise 0.
  */
 int pci_sriov_get_totalvfs(struct pci_dev *dev)
 {
 	if (!dev->is_physfn)
-		return -EINVAL;
+		return 0;
 
 	if (dev->sriov->driver_max_VFs)
 		return dev->sriov->driver_max_VFs;