ixgbe: Add support for dcbnl_rtnl_ops.setapp/getapp
Add support for dcbnl_rtnl_ops.setapp/getapp to set or get the current user
priority bitmap for the given application protocol. Currently, 82599 only
supports setapp/getapp for Fiber Channel over Ethernet (FCoE) protocol.
Signed-off-by: Yi Zou <yi.zou@intel.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ixgbe/ixgbe_fcoe.c b/drivers/net/ixgbe/ixgbe_fcoe.c
index 26fe46f..0607cff 100644
--- a/drivers/net/ixgbe/ixgbe_fcoe.c
+++ b/drivers/net/ixgbe/ixgbe_fcoe.c
@@ -27,6 +27,9 @@
#include "ixgbe.h"
+#ifdef CONFIG_IXGBE_DCB
+#include "ixgbe_dcb_82599.h"
+#endif /* CONFIG_IXGBE_DCB */
#include <linux/if_ether.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
@@ -648,3 +651,64 @@
out_disable:
return rc;
}
+
+#ifdef CONFIG_IXGBE_DCB
+/**
+ * ixgbe_fcoe_getapp - retrieves current user priority bitmap for FCoE
+ * @adapter : ixgbe adapter
+ *
+ * Finds out the corresponding user priority bitmap from the current
+ * traffic class that FCoE belongs to. Returns 0 as the invalid user
+ * priority bitmap to indicate an error.
+ *
+ * Returns : 802.1p user priority bitmap for FCoE
+ */
+u8 ixgbe_fcoe_getapp(struct ixgbe_adapter *adapter)
+{
+ int i;
+ u8 tc;
+ u32 up2tc;
+
+ up2tc = IXGBE_READ_REG(&adapter->hw, IXGBE_RTTUP2TC);
+ for (i = 0; i < MAX_USER_PRIORITY; i++) {
+ tc = (u8)(up2tc >> (i * IXGBE_RTTUP2TC_UP_SHIFT));
+ tc &= (MAX_TRAFFIC_CLASS - 1);
+ if (adapter->fcoe.tc == tc)
+ return 1 << i;
+ }
+
+ return 0;
+}
+
+/**
+ * ixgbe_fcoe_setapp - sets the user priority bitmap for FCoE
+ * @adapter : ixgbe adapter
+ * @up : 802.1p user priority bitmap
+ *
+ * Finds out the traffic class from the input user priority
+ * bitmap for FCoE.
+ *
+ * Returns : 0 on success otherwise returns 1 on error
+ */
+u8 ixgbe_fcoe_setapp(struct ixgbe_adapter *adapter, u8 up)
+{
+ int i;
+ u32 up2tc;
+
+ /* valid user priority bitmap must not be 0 */
+ if (up) {
+ /* from user priority to the corresponding traffic class */
+ up2tc = IXGBE_READ_REG(&adapter->hw, IXGBE_RTTUP2TC);
+ for (i = 0; i < MAX_USER_PRIORITY; i++) {
+ if (up & (1 << i)) {
+ up2tc >>= (i * IXGBE_RTTUP2TC_UP_SHIFT);
+ up2tc &= (MAX_TRAFFIC_CLASS - 1);
+ adapter->fcoe.tc = (u8)up2tc;
+ return 0;
+ }
+ }
+ }
+
+ return 1;
+}
+#endif /* CONFIG_IXGBE_DCB */