This patch is to add new sysfs interface of "notify_vf" under sysfs
directory of VF PCI device for Qemu to notify VF when migration status
is changed.
Signed-off-by: Lan Tianyu <tianyu.lan@xxxxxxxxx>
---
drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c | 30 ++++++++++++++++++++++++++
drivers/net/ethernet/intel/ixgbe/ixgbe_type.h | 4 ++++
2 files changed, 34 insertions(+)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
index e247d67..5cc7817 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
@@ -217,10 +217,37 @@ static ssize_t ixgbe_store_state_in_pf(struct device *dev,
return count;
}
+static ssize_t ixgbe_store_notify_vf(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ixgbe_adapter *adapter = to_adapter(dev);
+ struct ixgbe_hw *hw = &adapter->hw;
+ struct pci_dev *vf_pdev = to_pci_dev(dev);
+ int vfn = vf_pdev->virtfn_index;
+ u32 ivar;
+
+ /* Enable VF mailbox irq first */
+ IXGBE_WRITE_REG(hw, IXGBE_PVTEIMS(vfn), 0x4);
+ IXGBE_WRITE_REG(hw, IXGBE_PVTEIAM(vfn), 0x4);
+ IXGBE_WRITE_REG(hw, IXGBE_PVTEIAC(vfn), 0x4);
+
+ ivar = IXGBE_READ_REG(hw, IXGBE_PVTIVAR_MISC(vfn));
+ ivar &= ~0xFF;
+ ivar |= 0x2 | IXGBE_IVAR_ALLOC_VAL;
+ IXGBE_WRITE_REG(hw, IXGBE_PVTIVAR_MISC(vfn), ivar);
+
+ ixgbe_ping_vf(adapter, vfn);
+ return count;
+}
+
static struct device_attribute ixgbe_per_state_in_pf_attribute =
__ATTR(state_in_pf, S_IRUGO | S_IWUSR,
ixgbe_show_state_in_pf, ixgbe_store_state_in_pf);
+static struct device_attribute ixgbe_per_notify_vf_attribute =
+ __ATTR(notify_vf, S_IWUSR, NULL, ixgbe_store_notify_vf);
+
void ixgbe_add_vf_attrib(struct ixgbe_adapter *adapter)
{
struct pci_dev *pdev = adapter->pdev;
@@ -241,6 +268,8 @@ void ixgbe_add_vf_attrib(struct ixgbe_adapter *adapter)
if (vfdev->is_virtfn) {
ret = device_create_file(&vfdev->dev,
&ixgbe_per_state_in_pf_attribute);
+ ret |= device_create_file(&vfdev->dev,
+ &ixgbe_per_notify_vf_attribute);
if (ret)
pr_warn("Unable to add VF attribute for dev %s,\n",
dev_name(&vfdev->dev));
@@ -269,6 +298,7 @@ void ixgbe_remove_vf_attrib(struct ixgbe_adapter *adapter)
while (vfdev) {
if (vfdev->is_virtfn) {
device_remove_file(&vfdev->dev, &ixgbe_per_state_in_pf_attribute);
+ device_remove_file(&vfdev->dev, &ixgbe_per_notify_vf_attribute);
}
vfdev = pci_get_device(pdev->vendor, vf_id, vfdev);
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
index dd6ba59..c6ddb66 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_type.h
@@ -2302,6 +2302,10 @@ enum {
#define IXGBE_PVFTDT(P) (0x06018 + (0x40 * (P)))
#define IXGBE_PVFTDWBAL(P) (0x06038 + (0x40 * (P)))
#define IXGBE_PVFTDWBAH(P) (0x0603C + (0x40 * (P)))
+#define IXGBE_PVTEIMS(P) (0x00D00 + (4 * (P)))
+#define IXGBE_PVTIVAR_MISC(P) (0x04E00 + (4 * (P)))
+#define IXGBE_PVTEIAC(P) (0x00F00 + (4 * P))
+#define IXGBE_PVTEIAM(P) (0x04D00 + (4 * P))
#define IXGBE_PVFTDWBALn(q_per_pool, vf_number, vf_q_index) \
(IXGBE_PVFTDWBAL((q_per_pool)*(vf_number) + (vf_q_index)))
--
1.8.4.rc0.1.g8f6a3e5.dirty
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