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ixgbe: Reconfigure SR-IOV Init

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Use the PCI device flag indicating if a VF is assigned to a guest VM
to guard against destroying VFs upon driver removal.  Implement
additional feature to detect if VFs already exist when the driver
is loaded and if so configure them and set the driver state to
SR-IOV enabled.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Greg Rose 2011-08-24 02:37:55 +00:00 • committed by Jeff Kirsher
parent 6777829cfe
commit c6bda30a06
5 changed files with 225 additions and 97 deletions
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105
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View file

@ -134,42 +134,6 @@ MODULE_VERSION(DRV_VERSION);
#define DEFAULT_DEBUG_LEVEL_SHIFT 3
static inline void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
{
struct ixgbe_hw *hw = &adapter->hw;
u32 gcr;
u32 gpie;
u32 vmdctl;
#ifdef CONFIG_PCI_IOV
/* disable iov and allow time for transactions to clear */
pci_disable_sriov(adapter->pdev);
#endif
/* turn off device IOV mode */
gcr = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
gcr &= ~(IXGBE_GCR_EXT_SRIOV);
IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr);
gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
gpie &= ~IXGBE_GPIE_VTMODE_MASK;
IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
/* set default pool back to 0 */
vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
IXGBE_WRITE_FLUSH(hw);
/* take a breather then clean up driver data */
msleep(100);
kfree(adapter->vfinfo);
adapter->vfinfo = NULL;
adapter->num_vfs = 0;
adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
}
static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter)
{
if (!test_bit(__IXGBE_DOWN, &adapter->state) &&
@ -7064,11 +7028,8 @@ static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
{
#ifdef CONFIG_PCI_IOV
struct ixgbe_hw *hw = &adapter->hw;
int err;
int num_vf_macvlans, i;
struct vf_macvlans *mv_list;
if (hw->mac.type == ixgbe_mac_82598EB || !max_vfs)
if (hw->mac.type == ixgbe_mac_82598EB)
return;
/* The 82599 supports up to 64 VFs per physical function
@ -7077,60 +7038,7 @@ static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
* physical function
*/
adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs;
adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED;
err = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
if (err) {
e_err(probe, "Failed to enable PCI sriov: %d\n", err);
goto err_novfs;
}
num_vf_macvlans = hw->mac.num_rar_entries -
(IXGBE_MAX_PF_MACVLANS + 1 + adapter->num_vfs);
adapter->mv_list = mv_list = kcalloc(num_vf_macvlans,
sizeof(struct vf_macvlans),
GFP_KERNEL);
if (mv_list) {
/* Initialize list of VF macvlans */
INIT_LIST_HEAD(&adapter->vf_mvs.l);
for (i = 0; i < num_vf_macvlans; i++) {
mv_list->vf = -1;
mv_list->free = true;
mv_list->rar_entry = hw->mac.num_rar_entries -
(i + adapter->num_vfs + 1);
list_add(&mv_list->l, &adapter->vf_mvs.l);
mv_list++;
}
}
/* If call to enable VFs succeeded then allocate memory
* for per VF control structures.
*/
adapter->vfinfo =
kcalloc(adapter->num_vfs,
sizeof(struct vf_data_storage), GFP_KERNEL);
if (adapter->vfinfo) {
/* Now that we're sure SR-IOV is enabled
* and memory allocated set up the mailbox parameters
*/
ixgbe_init_mbx_params_pf(hw);
memcpy(&hw->mbx.ops, ii->mbx_ops,
sizeof(hw->mbx.ops));
/* Disable RSC when in SR-IOV mode */
adapter->flags2 &= ~(IXGBE_FLAG2_RSC_CAPABLE |
IXGBE_FLAG2_RSC_ENABLED);
return;
}
/* Oh oh */
e_err(probe, "Unable to allocate memory for VF Data Storage - "
"SRIOV disabled\n");
pci_disable_sriov(adapter->pdev);
err_novfs:
adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
adapter->num_vfs = 0;
ixgbe_enable_sriov(adapter, ii);
#endif /* CONFIG_PCI_IOV */
}
@ -7580,8 +7488,13 @@ static void __devexit ixgbe_remove(struct pci_dev *pdev)
if (netdev->reg_state == NETREG_REGISTERED)
unregister_netdev(netdev);
if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
ixgbe_disable_sriov(adapter);
if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
if (!(ixgbe_check_vf_assignment(adapter)))
ixgbe_disable_sriov(adapter);
else
e_dev_warn("Unloading driver while VFs are assigned "
"- VFs will not be deallocated\n");
}
ixgbe_clear_interrupt_scheme(adapter);