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ixgbe: Implement PCI SR-IOV sysfs callback operation 

Implement callbacks in the driver for the new PCI bus driver
interface that allows the user to enable/disable SR-IOV VFs
in a device via the sysfs interface.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
CC: Don Dutile <ddutile@redhat.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Greg Rose 2012-12-11 08:26:43 +00:00 committed by Jeff Kirsher
parent 66dcfd7569
commit da36b64736
4 changed files with 122 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/ethernet/intel/ixgbe/ixgbe.h
View File

@ -778,5 +778,8 @@ extern int ixgbe_ptp_hwtstamp_ioctl(struct ixgbe_adapter *adapter,
extern void ixgbe_ptp_start_cyclecounter(struct ixgbe_adapter *adapter);
extern void ixgbe_ptp_reset(struct ixgbe_adapter *adapter);
extern void ixgbe_ptp_check_pps_event(struct ixgbe_adapter *adapter, u32 eicr);
#ifdef CONFIG_PCI_IOV
void ixgbe_sriov_reinit(struct ixgbe_adapter *adapter);
#endif
#endif /* _IXGBE_H_ */

31
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View File

@ -6836,6 +6836,26 @@ int ixgbe_setup_tc(struct net_device *dev, u8 tc)
}
#endif /* CONFIG_IXGBE_DCB */
#ifdef CONFIG_PCI_IOV
void ixgbe_sriov_reinit(struct ixgbe_adapter *adapter)
{
struct net_device *netdev = adapter->netdev;
rtnl_lock();
#ifdef CONFIG_IXGBE_DCB
ixgbe_setup_tc(netdev, netdev_get_num_tc(netdev));
#else
if (netif_running(netdev))
ixgbe_close(netdev);
ixgbe_clear_interrupt_scheme(adapter);
ixgbe_init_interrupt_scheme(adapter);
if (netif_running(netdev))
ixgbe_open(netdev);
#endif
rtnl_unlock();
}
#endif
void ixgbe_do_reset(struct net_device *netdev)
{
struct ixgbe_adapter *adapter = netdev_priv(netdev);
@ -7625,8 +7645,14 @@ static void ixgbe_remove(struct pci_dev *pdev)
if (netdev->reg_state == NETREG_REGISTERED)
unregister_netdev(netdev);
ixgbe_disable_sriov(adapter);
#ifdef CONFIG_PCI_IOV
/*
* Only disable SR-IOV on unload if the user specified the now
* deprecated max_vfs module parameter.
*/
if (max_vfs)
ixgbe_disable_sriov(adapter);
#endif
ixgbe_clear_interrupt_scheme(adapter);
ixgbe_release_hw_control(adapter);
@ -7840,6 +7866,7 @@ static struct pci_driver ixgbe_driver = {
.resume = ixgbe_resume,
#endif
.shutdown = ixgbe_shutdown,
.sriov_configure = ixgbe_pci_sriov_configure,
.err_handler = &ixgbe_err_handler
};

91
drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
View File

@ -207,11 +207,12 @@ static bool ixgbe_vfs_are_assigned(struct ixgbe_adapter *adapter)
}
#endif /* #ifdef CONFIG_PCI_IOV */
void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
int ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
{
struct ixgbe_hw *hw = &adapter->hw;
u32 gpie;
u32 vmdctl;
int rss;
/* set num VFs to 0 to prevent access to vfinfo */
adapter->num_vfs = 0;
@ -226,7 +227,7 @@ void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
/* if SR-IOV is already disabled then there is nothing to do */
if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
return;
return 0;
#ifdef CONFIG_PCI_IOV
/*
@ -236,7 +237,7 @@ void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
*/
if (ixgbe_vfs_are_assigned(adapter)) {
e_dev_warn("Unloading driver while VFs are assigned - VFs will not be deallocated\n");
return;
return -EPERM;
}
/* disable iov and allow time for transactions to clear */
pci_disable_sriov(adapter->pdev);
@ -259,10 +260,94 @@ void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
adapter->flags &= ~IXGBE_FLAG_VMDQ_ENABLED;
adapter->ring_feature[RING_F_VMDQ].offset = 0;
rss = min_t(int, IXGBE_MAX_RSS_INDICES, num_online_cpus());
adapter->ring_feature[RING_F_RSS].limit = rss;
/* take a breather then clean up driver data */
msleep(100);
adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
return 0;
}
static int ixgbe_pci_sriov_enable(struct pci_dev *dev, int num_vfs)
{
#ifdef CONFIG_PCI_IOV
struct ixgbe_adapter *adapter = pci_get_drvdata(dev);
int err = 0;
int i;
int pre_existing_vfs = pci_num_vf(dev);
if (pre_existing_vfs && pre_existing_vfs != num_vfs)
err = ixgbe_disable_sriov(adapter);
else if (pre_existing_vfs && pre_existing_vfs == num_vfs)
goto out;
if (err)
goto err_out;
/* While the SR-IOV capability structure reports total VFs to be
* 64 we limit the actual number that can be allocated to 63 so
* that some transmit/receive resources can be reserved to the
* PF. The PCI bus driver already checks for other values out of
* range.
*/
if (num_vfs > 63) {
err = -EPERM;
goto err_out;
}
adapter->num_vfs = num_vfs;
err = __ixgbe_enable_sriov(adapter);
if (err)
goto err_out;
for (i = 0; i < adapter->num_vfs; i++)
ixgbe_vf_configuration(dev, (i | 0x10000000));
err = pci_enable_sriov(dev, num_vfs);
if (err) {
e_dev_warn("Failed to enable PCI sriov: %d\n", err);
goto err_out;
}
ixgbe_sriov_reinit(adapter);
out:
return num_vfs;
err_out:
return err;
#endif
return 0;
}
static int ixgbe_pci_sriov_disable(struct pci_dev *dev)
{
struct ixgbe_adapter *adapter = pci_get_drvdata(dev);
int err;
u32 current_flags = adapter->flags;
err = ixgbe_disable_sriov(adapter);
/* Only reinit if no error and state changed */
if (!err && current_flags != adapter->flags) {
/* ixgbe_disable_sriov() doesn't clear VMDQ flag */
adapter->flags &= ~IXGBE_FLAG_VMDQ_ENABLED;
#ifdef CONFIG_PCI_IOV
ixgbe_sriov_reinit(adapter);
#endif
}
return err;
}
int ixgbe_pci_sriov_configure(struct pci_dev *dev, int num_vfs)
{
if (num_vfs == 0)
return ixgbe_pci_sriov_disable(dev);
else
return ixgbe_pci_sriov_enable(dev, num_vfs);
}
static int ixgbe_set_vf_multicasts(struct ixgbe_adapter *adapter,

3
drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h
View File

@ -41,10 +41,11 @@ int ixgbe_ndo_set_vf_spoofchk(struct net_device *netdev, int vf, bool setting);
int ixgbe_ndo_get_vf_config(struct net_device *netdev,
int vf, struct ifla_vf_info *ivi);
void ixgbe_check_vf_rate_limit(struct ixgbe_adapter *adapter);
void ixgbe_disable_sriov(struct ixgbe_adapter *adapter);
int ixgbe_disable_sriov(struct ixgbe_adapter *adapter);
#ifdef CONFIG_PCI_IOV
void ixgbe_enable_sriov(struct ixgbe_adapter *adapter);
#endif
int ixgbe_pci_sriov_configure(struct pci_dev *dev, int num_vfs);
static inline void ixgbe_set_vmvir(struct ixgbe_adapter *adapter,
u16 vid, u16 qos, u32 vf)