qlcnic: Support SR-IOV enable and disable

o Add QLCNIC_SRIOV to Kconfig.
o Provide PCI sysfs hooks to enable and disable SR-IOV.
o Allow enabling only when CONFIG_QLCNIC_SRIOV is defined.
o qlcnic_sriov_pf.c has all the PF related SR-IOV
  functionality.
o qlcnic_sriov_common.c has VF functionality and SR-IOV
  functionality which is common between VF and PF.
o qlcnic_sriov.h is a common header file for SR-IOV defines.

Signed-off-by: Manish Chopra <manish.chopra@qlogic.com>
Signed-off-by: Sucheta Chakraborty <sucheta.chakraborty@qlogic.com>
Signed-off-by: Rajesh Borundia <rajesh.borundia@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 40 insertions, 0 deletions

diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_common.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_common.c
new file mode 100644
index 000000000000..fb08ad02f7df
--- /dev/null
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_common.c
@@ -0,0 +1,40 @@
+/*
+ * QLogic qlcnic NIC Driver
+ * Copyright (c) 2009-2013 QLogic Corporation
+ *
+ * See LICENSE.qlcnic for copyright and licensing details.
+ */
+
+#include "qlcnic_sriov.h"
+#include "qlcnic.h"
+#include <linux/types.h>
+
+int qlcnic_sriov_init(struct qlcnic_adapter *adapter, int num_vfs)
+{
+	struct qlcnic_sriov *sriov;
+
+	if (!qlcnic_sriov_enable_check(adapter))
+		return -EIO;
+
+	sriov  = kzalloc(sizeof(struct qlcnic_sriov), GFP_KERNEL);
+	if (!sriov)
+		return -ENOMEM;
+
+	adapter->ahw->sriov = sriov;
+	sriov->num_vfs = num_vfs;
+	return 0;
+}
+
+void __qlcnic_sriov_cleanup(struct qlcnic_adapter *adapter)
+{
+	if (!qlcnic_sriov_enable_check(adapter))
+		return;
+
+	kfree(adapter->ahw->sriov);
+}
+
+void qlcnic_sriov_cleanup(struct qlcnic_adapter *adapter)
+{
+	if (qlcnic_sriov_pf_check(adapter))
+		qlcnic_sriov_pf_cleanup(adapter);
+}