[PATCH 5/5] ixgbe: add driver set_max_vfs support

Yinghai Lu
2012-10-03T17:52:28Z

Need ixgbe guys to close the loop to use set_max_vfs instead
kernel parameters.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Cc: Jesse Brandeburg <jesse.brandeburg@intel.com>
Cc: Greg Rose <gregory.v.rose@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: John Fastabend <john.r.fastabend@intel.com>
Cc: e1000-devel@lists.sourceforge.net
Cc: netdev@vger.kernel.org
---
drivers/net/ethernet/intel/ixgbe/ixgbe.h | 2 +
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 44 +++++++++++++++++++-----
2 files changed, 37 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
index b9623e9..d39d975 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
@@ -558,6 +558,8 @@ struct ixgbe_adapter {
u32 interrupt_event;
u32 led_reg;

+ struct ixgbe_info *ixgbe_info;
+
#ifdef CONFIG_IXGBE_PTP
struct ptp_clock *ptp_clock;
struct ptp_clock_info ptp_caps;
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index ee61819..1c097c7 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -129,13 +129,6 @@ static struct notifier_block dca_notifier = {
};
#endif

-#ifdef CONFIG_PCI_IOV
-static unsigned int max_vfs;
-module_param(max_vfs, uint, 0);
-MODULE_PARM_DESC(max_vfs,
- "Maximum number of virtual functions to allocate per physical function - default is zero and maximum value is 63");
-#endif /* CONFIG_PCI_IOV */
-
static unsigned int allow_unsupported_sfp;
module_param(allow_unsupported_sfp, uint, 0);
MODULE_PARM_DESC(allow_unsupported_sfp,
@@ -4496,7 +4489,7 @@ static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
#ifdef CONFIG_PCI_IOV
/* assign number of SR-IOV VFs */
if (hw->mac.type != ixgbe_mac_82598EB)
- adapter->num_vfs = (max_vfs > 63) ? 0 : max_vfs;
+ adapter->num_vfs = min_t(int, pdev->max_vfs, 63);

#endif
/* enable itr by default in dynamic mode */
@@ -7220,8 +7213,9 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,

#ifdef CONFIG_PCI_IOV
ixgbe_enable_sriov(adapter, ii);
-
#endif
+ adapter->ixgbe_info = ii;
+
netdev->features = NETIF_F_SG |
NETIF_F_IP_CSUM |
NETIF_F_IPV6_CSUM |
@@ -7683,11 +7677,43 @@ static const struct pci_error_handlers ixgbe_err_handler = {
.resume = ixgbe_io_resume,
};

+static void ixgbe_set_max_vfs(struct pci_dev *pdev)
+{
+#ifdef CONFIG_PCI_IOV
+ struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
+ struct ixgbe_hw *hw = &adapter->hw;
+ int num_vfs = 0;
+
+ /* assign number of SR-IOV VFs */
+ if (hw->mac.type != ixgbe_mac_82598EB)
+ num_vfs = min_t(int, pdev->max_vfs, 63);
+
+ /* no change */
+ if (adapter->num_vfs == num_vfs)
+ return;
+
+ if (!num_vfs) {
+ /* disable sriov */
+ ixgbe_disable_sriov(adapter);
+ adapter->num_vfs = 0;
+ } else if (!adapter->num_vfs && num_vfs) {
+ /* enable sriov */
+ adapter->num_vfs = num_vfs;
+ ixgbe_enable_sriov(adapter, adapter->ixgbe_info);
+ } else {
+ /* increase or decrease */
+ }
+
+ pdev->max_vfs = adapter->num_vfs;
+#endif
+}
+
static struct pci_driver ixgbe_driver = {
.name = ixgbe_driver_name,
.id_table = ixgbe_pci_tbl,
.probe = ixgbe_probe,
.remove = __devexit_p(ixgbe_remove),
+ .set_max_vfs = ixgbe_set_max_vfs,
#ifdef CONFIG_PM
.suspend = ixgbe_suspend,
.resume = ixgbe_resume,
--
1.7.7