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Date: Fri, 14 Aug 2009 15:45:19 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org, linux-scsi@...r.kernel.org,
gospo@...hat.com, Yi Zou <yi.zou@...el.com>,
Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next PATCH 12/12] ixgbe: Add support for
dcbnl_rtnl_ops.setapp/getapp
From: Yi Zou <yi.zou@...el.com>
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@...el.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
drivers/net/ixgbe/ixgbe.h | 4 ++
drivers/net/ixgbe/ixgbe_dcb_nl.c | 60 ++++++++++++++++++++++++++++++++++++
drivers/net/ixgbe/ixgbe_fcoe.c | 64 ++++++++++++++++++++++++++++++++++++++
drivers/net/ixgbe/ixgbe_fcoe.h | 4 ++
drivers/net/ixgbe/ixgbe_main.c | 2 +
5 files changed, 134 insertions(+), 0 deletions(-)
diff --git a/drivers/net/ixgbe/ixgbe.h b/drivers/net/ixgbe/ixgbe.h
index 3c25524..cc324f3 100644
--- a/drivers/net/ixgbe/ixgbe.h
+++ b/drivers/net/ixgbe/ixgbe.h
@@ -486,6 +486,10 @@ extern int ixgbe_fcoe_ddp_get(struct net_device *netdev, u16 xid,
struct scatterlist *sgl, unsigned int sgc);
extern int ixgbe_fcoe_ddp_put(struct net_device *netdev, u16 xid);
extern int ixgbe_fcoe_control(struct net_device *netdev, u32 op);
+#ifdef CONFIG_IXGBE_DCB
+extern u8 ixgbe_fcoe_getapp(struct ixgbe_adapter *adapter);
+extern u8 ixgbe_fcoe_setapp(struct ixgbe_adapter *adapter, u8 up);
+#endif /* CONFIG_IXGBE_DCB */
#endif /* IXGBE_FCOE */
#endif /* _IXGBE_H_ */
diff --git a/drivers/net/ixgbe/ixgbe_dcb_nl.c b/drivers/net/ixgbe/ixgbe_dcb_nl.c
index e05c62a..47d9dde 100644
--- a/drivers/net/ixgbe/ixgbe_dcb_nl.c
+++ b/drivers/net/ixgbe/ixgbe_dcb_nl.c
@@ -480,6 +480,64 @@ static void ixgbe_dcbnl_setpfcstate(struct net_device *netdev, u8 state)
return;
}
+/**
+ * ixgbe_dcbnl_getapp - retrieve the DCBX application user priority
+ * @netdev : the corresponding netdev
+ * @idtype : identifies the id as ether type or TCP/UDP port number
+ * @id: id is either ether type or TCP/UDP port number
+ *
+ * Returns : on success, returns a non-zero 802.1p user priority bitmap
+ * otherwise returns 0 as the invalid user priority bitmap to indicate an
+ * error.
+ */
+static u8 ixgbe_dcbnl_getapp(struct net_device *netdev, u8 idtype, u16 id)
+{
+ u8 rval = 0;
+
+ switch (idtype) {
+ case DCB_APP_IDTYPE_ETHTYPE:
+#ifdef IXGBE_FCOE
+ if (id == ETH_P_FCOE)
+ rval = ixgbe_fcoe_getapp(netdev_priv(netdev));
+#endif
+ break;
+ case DCB_APP_IDTYPE_PORTNUM:
+ break;
+ default:
+ break;
+ }
+ return rval;
+}
+
+/**
+ * ixgbe_dcbnl_setapp - set the DCBX application user priority
+ * @netdev : the corresponding netdev
+ * @idtype : identifies the id as ether type or TCP/UDP port number
+ * @id: id is either ether type or TCP/UDP port number
+ * @up: the 802.1p user priority bitmap
+ *
+ * Returns : 0 on success or 1 on error
+ */
+static u8 ixgbe_dcbnl_setapp(struct net_device *netdev,
+ u8 idtype, u16 id, u8 up)
+{
+ u8 rval = 1;
+
+ switch (idtype) {
+ case DCB_APP_IDTYPE_ETHTYPE:
+#ifdef IXGBE_FCOE
+ if (id == ETH_P_FCOE)
+ rval = ixgbe_fcoe_setapp(netdev_priv(netdev), up);
+#endif
+ break;
+ case DCB_APP_IDTYPE_PORTNUM:
+ break;
+ default:
+ break;
+ }
+ return rval;
+}
+
struct dcbnl_rtnl_ops dcbnl_ops = {
.getstate = ixgbe_dcbnl_get_state,
.setstate = ixgbe_dcbnl_set_state,
@@ -500,5 +558,7 @@ struct dcbnl_rtnl_ops dcbnl_ops = {
.setnumtcs = ixgbe_dcbnl_setnumtcs,
.getpfcstate = ixgbe_dcbnl_getpfcstate,
.setpfcstate = ixgbe_dcbnl_setpfcstate,
+ .getapp = ixgbe_dcbnl_getapp,
+ .setapp = ixgbe_dcbnl_setapp,
};
diff --git a/drivers/net/ixgbe/ixgbe_fcoe.c b/drivers/net/ixgbe/ixgbe_fcoe.c
index b67ed27..39336f0 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>
@@ -674,3 +677,64 @@ int ixgbe_fcoe_control(struct net_device *netdev, u32 op)
out:
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 */
diff --git a/drivers/net/ixgbe/ixgbe_fcoe.h b/drivers/net/ixgbe/ixgbe_fcoe.h
index c5b5002..b5dee7b 100644
--- a/drivers/net/ixgbe/ixgbe_fcoe.h
+++ b/drivers/net/ixgbe/ixgbe_fcoe.h
@@ -46,6 +46,9 @@
#define IXGBE_FCBUFF_MIN 4096 /* 4KB min */
#define IXGBE_FCOE_DDP_MAX 512 /* 9 bits xid */
+/* Default traffic class to use for FCoE */
+#define IXGBE_FCOE_DEFTC 3
+
/* fcerr */
#define IXGBE_FCERR_BADCRC 0x00100000
@@ -59,6 +62,7 @@ struct ixgbe_fcoe_ddp {
};
struct ixgbe_fcoe {
+ u8 tc;
spinlock_t lock;
struct pci_pool *pool;
struct ixgbe_fcoe_ddp ddp[IXGBE_FCOE_DDP_MAX];
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 9738317..f4fc4ae 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -3801,6 +3801,8 @@ static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
adapter->ring_feature[RING_F_FCOE].indices = 0;
+ /* Default traffic class to use for FCoE */
+ adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
#endif /* IXGBE_FCOE */
}
--
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