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igb: Change how we check for pre-existing and assigned VFs 

Adapt the pre-existing and assigned VFs code to the ixgbe way introduced
in commit 9297127b9c.

Instead of searching the enabled VFs we use pci_num_vf to determine enabled VFs.
By comparing to which PF an assigned VF is owned it's possible to decide
whether to leave it enabled or not.

Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
Acked-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Robert Garrett <robertx.e.garrett@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Stefan Assmann 2012-08-18 04:06:11 +00:00 committed by Jeff Kirsher
parent abb17e6c0c
commit f557147c46
2 changed files with 22 additions and 83 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/net/ethernet/intel/igb/igb.h
View File

@ -101,7 +101,6 @@ struct vf_data_storage {
u16 pf_vlan; /* When set, guest VLAN config not allowed. */
u16 pf_qos;
u16 tx_rate;
struct pci_dev *vfdev;
};
#define IGB_VF_FLAG_CTS 0x00000001 /* VF is clear to send data */

104
drivers/net/ethernet/intel/igb/igb_main.c
View File

@ -172,8 +172,7 @@ static void igb_check_vf_rate_limit(struct igb_adapter *);
#ifdef CONFIG_PCI_IOV
static int igb_vf_configure(struct igb_adapter *adapter, int vf);
static int igb_find_enabled_vfs(struct igb_adapter *adapter);
static int igb_check_vf_assignment(struct igb_adapter *adapter);
static bool igb_vfs_are_assigned(struct igb_adapter *adapter);
#endif
#ifdef CONFIG_PM
@ -2300,11 +2299,11 @@ static void __devexit igb_remove(struct pci_dev *pdev)
/* reclaim resources allocated to VFs */
if (adapter->vf_data) {
/* disable iov and allow time for transactions to clear */
if (!igb_check_vf_assignment(adapter)) {
if (igb_vfs_are_assigned(adapter)) {
dev_info(&pdev->dev, "Unloading driver while VFs are assigned - VFs will not be deallocated\n");
} else {
pci_disable_sriov(pdev);
msleep(500);
} else {
dev_info(&pdev->dev, "VF(s) assigned to guests!\n");
}
kfree(adapter->vf_data);
@ -2344,7 +2343,7 @@ static void __devinit igb_probe_vfs(struct igb_adapter * adapter)
#ifdef CONFIG_PCI_IOV
struct pci_dev *pdev = adapter->pdev;
struct e1000_hw *hw = &adapter->hw;
int old_vfs = igb_find_enabled_vfs(adapter);
int old_vfs = pci_num_vf(adapter->pdev);
int i;
/* Virtualization features not supported on i210 family. */
@ -5037,102 +5036,43 @@ static int igb_notify_dca(struct notifier_block *nb, unsigned long event,
static int igb_vf_configure(struct igb_adapter *adapter, int vf)
{
unsigned char mac_addr[ETH_ALEN];
struct pci_dev *pdev = adapter->pdev;
struct e1000_hw *hw = &adapter->hw;
struct pci_dev *pvfdev;
unsigned int device_id;
u16 thisvf_devfn;
eth_random_addr(mac_addr);
igb_set_vf_mac(adapter, vf, mac_addr);
switch (adapter->hw.mac.type) {
case e1000_82576:
device_id = IGB_82576_VF_DEV_ID;
/* VF Stride for 82576 is 2 */
thisvf_devfn = (pdev->devfn + 0x80 + (vf << 1)) |
(pdev->devfn & 1);
break;
case e1000_i350:
device_id = IGB_I350_VF_DEV_ID;
/* VF Stride for I350 is 4 */
thisvf_devfn = (pdev->devfn + 0x80 + (vf << 2)) |
(pdev->devfn & 3);
break;
default:
device_id = 0;
thisvf_devfn = 0;
break;
}
pvfdev = pci_get_device(hw->vendor_id, device_id, NULL);
while (pvfdev) {
if (pvfdev->devfn == thisvf_devfn)
break;
pvfdev = pci_get_device(hw->vendor_id,
device_id, pvfdev);
}
if (pvfdev)
adapter->vf_data[vf].vfdev = pvfdev;
else
dev_err(&pdev->dev,
"Couldn't find pci dev ptr for VF %4.4x\n",
thisvf_devfn);
return pvfdev != NULL;
return 0;
}
static int igb_find_enabled_vfs(struct igb_adapter *adapter)
static bool igb_vfs_are_assigned(struct igb_adapter *adapter)
{
struct e1000_hw *hw = &adapter->hw;
struct pci_dev *pdev = adapter->pdev;
struct pci_dev *pvfdev;
u16 vf_devfn = 0;
u16 vf_stride;
unsigned int device_id;
int vfs_found = 0;
struct pci_dev *vfdev;
int dev_id;
switch (adapter->hw.mac.type) {
case e1000_82576:
device_id = IGB_82576_VF_DEV_ID;
/* VF Stride for 82576 is 2 */
vf_stride = 2;
dev_id = IGB_82576_VF_DEV_ID;
break;
case e1000_i350:
device_id = IGB_I350_VF_DEV_ID;
/* VF Stride for I350 is 4 */
vf_stride = 4;
dev_id = IGB_I350_VF_DEV_ID;
break;
default:
device_id = 0;
vf_stride = 0;
break;
return false;
}
vf_devfn = pdev->devfn + 0x80;
pvfdev = pci_get_device(hw->vendor_id, device_id, NULL);
while (pvfdev) {
if (pvfdev->devfn == vf_devfn &&
(pvfdev->bus->number >= pdev->bus->number))
vfs_found++;
vf_devfn += vf_stride;
pvfdev = pci_get_device(hw->vendor_id,
device_id, pvfdev);
}
return vfs_found;
}
static int igb_check_vf_assignment(struct igb_adapter *adapter)
{
int i;
for (i = 0; i < adapter->vfs_allocated_count; i++) {
if (adapter->vf_data[i].vfdev) {
if (adapter->vf_data[i].vfdev->dev_flags &
PCI_DEV_FLAGS_ASSIGNED)
/* loop through all the VFs to see if we own any that are assigned */
vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, dev_id, NULL);
while (vfdev) {
/* if we don't own it we don't care */
if (vfdev->is_virtfn && vfdev->physfn == pdev) {
/* if it is assigned we cannot release it */
if (vfdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED)
return true;
}
vfdev = pci_get_device(PCI_VENDOR_ID_INTEL, dev_id, vfdev);
}
return false;
}