linux-kernel - [SR-IOV driver example 2/3] PF driver: integrate with SR-IOV core

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Message-ID: <20081126142156.GB13668@yzhao12-linux.sh.intel.com>
Date:	Wed, 26 Nov 2008 22:21:56 +0800
From:	Yu Zhao <yu.zhao@...el.com>
To:	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Cc:	"greg@...ah.com" <greg@...ah.com>,
	"matthew@....cx" <matthew@....cx>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"virtualization@...ts.linux-foundation.org" 
	<virtualization@...ts.linux-foundation.org>
Subject: [SR-IOV driver example 2/3] PF driver: integrate with SR-IOV core

This patch integrates the IGB driver with the SR-IOV core. It shows how
the SR-IOV API is used to support the capability. Obviously people does
not need to put much effort to integrate the PF driver with SR-IOV core.
All SR-IOV standard stuff are handled by SR-IOV core and PF driver only
concerns the device specific resource allocation and deallocation once it
gets the necessary information (i.e. number of Virtual Functions) from
the callback function.

---
 drivers/net/igb/igb_main.c |   30 ++++++++++++++++++++++++++++++
 1 files changed, 30 insertions(+), 0 deletions(-)

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index bc063d4..b8c7dc6 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -139,6 +139,7 @@ void igb_set_mc_list_pools(struct igb_adapter *, struct e1000_hw *, int, u16);
 static int igb_vmm_control(struct igb_adapter *, bool);
 static int igb_set_vf_mac(struct net_device *, int, u8*);
 static void igb_mbox_handler(struct igb_adapter *);
+static int igb_virtual(struct pci_dev *, int);
 #endif
 
 static int igb_suspend(struct pci_dev *, pm_message_t);
@@ -184,6 +185,9 @@ static struct pci_driver igb_driver = {
 #endif
 	.shutdown = igb_shutdown,
 	.err_handler = &igb_err_handler,
+#ifdef CONFIG_PCI_IOV
+	.virtual = igb_virtual
+#endif
 };
 
 static int global_quad_port_a; /* global quad port a indication */
@@ -5107,6 +5111,32 @@ void igb_set_mc_list_pools(struct igb_adapter *adapter,
 	reg_data |= (1 << 25);
 	wr32(E1000_VMOLR(pool), reg_data);
 }
+
+static	int
+igb_virtual(struct pci_dev *pdev, int nr_virtfn)
+{
+	unsigned char my_mac_addr[6] = {0x00, 0xDE, 0xAD, 0xBE, 0xEF, 0xFF};
+	struct net_device *netdev = pci_get_drvdata(pdev);
+	struct igb_adapter *adapter = netdev_priv(netdev);
+	int i;
+
+	if (nr_virtfn > 7)
+		return -EINVAL;
+
+	if (nr_virtfn) {
+		for (i = 0; i < nr_virtfn; i++) {
+			printk(KERN_INFO "SR-IOV: VF %d is enabled\n", i);
+			my_mac_addr[5] = (unsigned char)i;
+			igb_set_vf_mac(netdev, i, my_mac_addr);
+			igb_set_vf_vmolr(adapter, i);
+		}
+	} else
+		printk(KERN_INFO "SR-IOV is disabled\n");
+
+	adapter->vfs_allocated_count = nr_virtfn;
+
+	return 0;
+}
 #endif
 
 /* igb_main.c */
-- 
1.5.4.4

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