Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Pull networking updates from David Miller:
 "Highlights:

   1) Steady transitioning of the BPF instructure to a generic spot so
      all kernel subsystems can make use of it, from Alexei Starovoitov.

   2) SFC driver supports busy polling, from Alexandre Rames.

   3) Take advantage of hash table in UDP multicast delivery, from David
      Held.

   4) Lighten locking, in particular by getting rid of the LRU lists, in
      inet frag handling.  From Florian Westphal.

   5) Add support for various RFC6458 control messages in SCTP, from
      Geir Ola Vaagland.

   6) Allow to filter bridge forwarding database dumps by device, from
      Jamal Hadi Salim.

   7) virtio-net also now supports busy polling, from Jason Wang.

   8) Some low level optimization tweaks in pktgen from Jesper Dangaard
      Brouer.

   9) Add support for ipv6 address generation modes, so that userland
      can have some input into the process.  From Jiri Pirko.

  10) Consolidate common TCP connection request code in ipv4 and ipv6,
      from Octavian Purdila.

  11) New ARP packet logger in netfilter, from Pablo Neira Ayuso.

  12) Generic resizable RCU hash table, with intial users in netlink and
      nftables.  From Thomas Graf.

  13) Maintain a name assignment type so that userspace can see where a
      network device name came from (enumerated by kernel, assigned
      explicitly by userspace, etc.) From Tom Gundersen.

  14) Automatic flow label generation on transmit in ipv6, from Tom
      Herbert.

  15) New packet timestamping facilities from Willem de Bruijn, meant to
      assist in measuring latencies going into/out-of the packet
      scheduler, latency from TCP data transmission to ACK, etc"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1536 commits)
  cxgb4 : Disable recursive mailbox commands when enabling vi
  net: reduce USB network driver config options.
  tg3: Modify tg3_tso_bug() to handle multiple TX rings
  amd-xgbe: Perform phy connect/disconnect at dev open/stop
  amd-xgbe: Use dma_set_mask_and_coherent to set DMA mask
  net: sun4i-emac: fix memory leak on bad packet
  sctp: fix possible seqlock seadlock in sctp_packet_transmit()
  Revert "net: phy: Set the driver when registering an MDIO bus device"
  cxgb4vf: Turn off SGE RX/TX Callback Timers and interrupts in PCI shutdown routine
  team: Simplify return path of team_newlink
  bridge: Update outdated comment on promiscuous mode
  net-timestamp: ACK timestamp for bytestreams
  net-timestamp: TCP timestamping
  net-timestamp: SCHED timestamp on entering packet scheduler
  net-timestamp: add key to disambiguate concurrent datagrams
  net-timestamp: move timestamp flags out of sk_flags
  net-timestamp: extend SCM_TIMESTAMPING ancillary data struct
  cxgb4i : Move stray CPL definitions to cxgb4 driver
  tcp: reduce spurious retransmits due to transient SACK reneging
  qlcnic: Initialize dcbnl_ops before register_netdev
  ...

1 files changed, 971 insertions, 0 deletions

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_dcb.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_dcb.c
new file mode 100644
index 000000000000..0d3a9df5be36
--- /dev/null
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_dcb.c
@@ -0,0 +1,971 @@
+/*
+ *  Copyright (C) 2013-2014 Chelsio Communications.  All rights reserved.
+ *
+ *  Written by Anish Bhatt (anish@chelsio.com)
+ *	       Casey Leedom (leedom@chelsio.com)
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms and conditions of the GNU General Public License,
+ *  version 2, as published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ *  more details.
+ *
+ *  The full GNU General Public License is included in this distribution in
+ *  the file called "COPYING".
+ *
+ */
+
+#include "cxgb4.h"
+
+/* Initialize a port's Data Center Bridging state.  Typically used after a
+ * Link Down event.
+ */
+void cxgb4_dcb_state_init(struct net_device *dev)
+{
+	struct port_info *pi = netdev2pinfo(dev);
+	struct port_dcb_info *dcb = &pi->dcb;
+
+	memset(dcb, 0, sizeof(struct port_dcb_info));
+	dcb->state = CXGB4_DCB_STATE_START;
+}
+
+/* Finite State machine for Data Center Bridging.
+ */
+void cxgb4_dcb_state_fsm(struct net_device *dev,
+			 enum cxgb4_dcb_state_input input)
+{
+	struct port_info *pi = netdev2pinfo(dev);
+	struct port_dcb_info *dcb = &pi->dcb;
+	struct adapter *adap = pi->adapter;
+
+	switch (input) {
+	case CXGB4_DCB_INPUT_FW_DISABLED: {
+		/* Firmware tells us it's not doing DCB */
+		switch (dcb->state) {
+		case CXGB4_DCB_STATE_START: {
+			/* we're going to use Host DCB */
+			dcb->state = CXGB4_DCB_STATE_HOST;
+			dcb->supported = CXGB4_DCBX_HOST_SUPPORT;
+			dcb->enabled = 1;
+			break;
+		}
+
+		case CXGB4_DCB_STATE_HOST: {
+			/* we're alreaady in Host DCB mode */
+			break;
+		}
+
+		default:
+			goto bad_state_transition;
+		}
+		break;
+	}
+
+	case CXGB4_DCB_INPUT_FW_ENABLED: {
+		/* Firmware tells us that it is doing DCB */
+		switch (dcb->state) {
+		case CXGB4_DCB_STATE_START: {
+			/* we're going to use Firmware DCB */
+			dcb->state = CXGB4_DCB_STATE_FW_INCOMPLETE;
+			dcb->supported = CXGB4_DCBX_FW_SUPPORT;
+			break;
+		}
+
+		case CXGB4_DCB_STATE_FW_INCOMPLETE:
+		case CXGB4_DCB_STATE_FW_ALLSYNCED: {
+			/* we're alreaady in firmware DCB mode */
+			break;
+		}
+
+		default:
+			goto bad_state_transition;
+		}
+		break;
+	}
+
+	case CXGB4_DCB_INPUT_FW_INCOMPLETE: {
+		/* Firmware tells us that its DCB state is incomplete */
+		switch (dcb->state) {
+		case CXGB4_DCB_STATE_FW_INCOMPLETE: {
+			/* we're already incomplete */
+			break;
+		}
+
+		case CXGB4_DCB_STATE_FW_ALLSYNCED: {
+			/* We were successfully running with firmware DCB but
+			 * now it's telling us that it's in an "incomplete
+			 * state.  We need to reset back to a ground state
+			 * of incomplete.
+			 */
+			cxgb4_dcb_state_init(dev);
+			dcb->state = CXGB4_DCB_STATE_FW_INCOMPLETE;
+			dcb->supported = CXGB4_DCBX_FW_SUPPORT;
+			linkwatch_fire_event(dev);
+			break;
+		}
+
+		default:
+			goto bad_state_transition;
+		}
+		break;
+	}
+
+	case CXGB4_DCB_INPUT_FW_ALLSYNCED: {
+		/* Firmware tells us that its DCB state is complete */
+		switch (dcb->state) {
+		case CXGB4_DCB_STATE_FW_INCOMPLETE: {
+			dcb->state = CXGB4_DCB_STATE_FW_ALLSYNCED;
+			dcb->enabled = 1;
+			linkwatch_fire_event(dev);
+			break;
+		}
+
+		case CXGB4_DCB_STATE_FW_ALLSYNCED: {
+			/* we're already all sync'ed */
+			break;
+		}
+
+		default:
+			goto bad_state_transition;
+		}
+		break;
+	}
+
+	default:
+		goto  bad_state_input;
+	}
+	return;
+
+bad_state_input:
+	dev_err(adap->pdev_dev, "cxgb4_dcb_state_fsm: illegal input symbol %d\n",
+		input);
+	return;
+
+bad_state_transition:
+	dev_err(adap->pdev_dev, "cxgb4_dcb_state_fsm: bad state transition, state = %d, input = %d\n",
+		dcb->state, input);
+}
+
+/* Handle a DCB/DCBX update message from the firmware.
+ */
+void cxgb4_dcb_handle_fw_update(struct adapter *adap,
+				const struct fw_port_cmd *pcmd)
+{
+	const union fw_port_dcb *fwdcb = &pcmd->u.dcb;
+	int port = FW_PORT_CMD_PORTID_GET(be32_to_cpu(pcmd->op_to_portid));
+	struct net_device *dev = adap->port[port];
+	struct port_info *pi = netdev_priv(dev);
+	struct port_dcb_info *dcb = &pi->dcb;
+	int dcb_type = pcmd->u.dcb.pgid.type;
+
+	/* Handle Firmware DCB Control messages separately since they drive
+	 * our state machine.
+	 */
+	if (dcb_type == FW_PORT_DCB_TYPE_CONTROL) {
+		enum cxgb4_dcb_state_input input =
+			((pcmd->u.dcb.control.all_syncd_pkd &
+			  FW_PORT_CMD_ALL_SYNCD)
+			 ? CXGB4_DCB_STATE_FW_ALLSYNCED
+			 : CXGB4_DCB_STATE_FW_INCOMPLETE);
+
+		cxgb4_dcb_state_fsm(dev, input);
+		return;
+	}
+
+	/* It's weird, and almost certainly an error, to get Firmware DCB
+	 * messages when we either haven't been told whether we're going to be
+	 * doing Host or Firmware DCB; and even worse when we've been told
+	 * that we're doing Host DCB!
+	 */
+	if (dcb->state == CXGB4_DCB_STATE_START ||
+	    dcb->state == CXGB4_DCB_STATE_HOST) {
+		dev_err(adap->pdev_dev, "Receiving Firmware DCB messages in State %d\n",
+			dcb->state);
+		return;
+	}
+
+	/* Now handle the general Firmware DCB update messages ...
+	 */
+	switch (dcb_type) {
+	case FW_PORT_DCB_TYPE_PGID:
+		dcb->pgid = be32_to_cpu(fwdcb->pgid.pgid);
+		dcb->msgs |= CXGB4_DCB_FW_PGID;
+		break;
+
+	case FW_PORT_DCB_TYPE_PGRATE:
+		dcb->pg_num_tcs_supported = fwdcb->pgrate.num_tcs_supported;
+		memcpy(dcb->pgrate, &fwdcb->pgrate.pgrate,
+		       sizeof(dcb->pgrate));
+		dcb->msgs |= CXGB4_DCB_FW_PGRATE;
+		break;
+
+	case FW_PORT_DCB_TYPE_PRIORATE:
+		memcpy(dcb->priorate, &fwdcb->priorate.strict_priorate,
+		       sizeof(dcb->priorate));
+		dcb->msgs |= CXGB4_DCB_FW_PRIORATE;
+		break;
+
+	case FW_PORT_DCB_TYPE_PFC:
+		dcb->pfcen = fwdcb->pfc.pfcen;
+		dcb->pfc_num_tcs_supported = fwdcb->pfc.max_pfc_tcs;
+		dcb->msgs |= CXGB4_DCB_FW_PFC;
+		break;
+
+	case FW_PORT_DCB_TYPE_APP_ID: {
+		const struct fw_port_app_priority *fwap = &fwdcb->app_priority;
+		int idx = fwap->idx;
+		struct app_priority *ap = &dcb->app_priority[idx];
+
+		struct dcb_app app = {
+			.selector = fwap->sel_field,
+			.protocol = be16_to_cpu(fwap->protocolid),
+			.priority = fwap->user_prio_map,
+		};
+		int err;
+
+		err = dcb_setapp(dev, &app);
+		if (err)
+			dev_err(adap->pdev_dev,
+				"Failed DCB Set Application Priority: sel=%d, prot=%d, prio=%d, err=%d\n",
+				app.selector, app.protocol, app.priority, -err);
+
+		ap->user_prio_map = fwap->user_prio_map;
+		ap->sel_field = fwap->sel_field;
+		ap->protocolid = be16_to_cpu(fwap->protocolid);
+		dcb->msgs |= CXGB4_DCB_FW_APP_ID;
+		break;
+	}
+
+	default:
+		dev_err(adap->pdev_dev, "Unknown DCB update type received %x\n",
+			dcb_type);
+		break;
+	}
+}
+
+/* Data Center Bridging netlink operations.
+ */
+
+
+/* Get current DCB enabled/disabled state.
+ */
+static u8 cxgb4_getstate(struct net_device *dev)
+{
+	struct port_info *pi = netdev2pinfo(dev);
+
+	return pi->dcb.enabled;
+}
+
+/* Set DCB enabled/disabled.
+ */
+static u8 cxgb4_setstate(struct net_device *dev, u8 enabled)
+{
+	struct port_info *pi = netdev2pinfo(dev);
+
+	/* Firmware doesn't provide any mechanism to control the DCB state.
+	 */
+	if (enabled != (pi->dcb.state == CXGB4_DCB_STATE_FW_ALLSYNCED))
+		return 1;
+
+	return 0;
+}
+
+static void cxgb4_getpgtccfg(struct net_device *dev, int tc,
+			     u8 *prio_type, u8 *pgid, u8 *bw_per,
+			     u8 *up_tc_map, int local)
+{
+	struct fw_port_cmd pcmd;
+	struct port_info *pi = netdev2pinfo(dev);
+	struct adapter *adap = pi->adapter;
+	int err;
+
+	*prio_type = *pgid = *bw_per = *up_tc_map = 0;
+
+	if (local)
+		INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
+	else
+		INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
+
+	pcmd.u.dcb.pgid.type = FW_PORT_DCB_TYPE_PGID;
+	err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+	if (err != FW_PORT_DCB_CFG_SUCCESS) {
+		dev_err(adap->pdev_dev, "DCB read PGID failed with %d\n", -err);
+		return;
+	}
+	*pgid = (be32_to_cpu(pcmd.u.dcb.pgid.pgid) >> (tc * 4)) & 0xf;
+
+	INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
+	pcmd.u.dcb.pgrate.type = FW_PORT_DCB_TYPE_PGRATE;
+	err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+	if (err != FW_PORT_DCB_CFG_SUCCESS) {
+		dev_err(adap->pdev_dev, "DCB read PGRATE failed with %d\n",
+			-err);
+		return;
+	}
+
+	*bw_per = pcmd.u.dcb.pgrate.pgrate[*pgid];
+	*up_tc_map = (1 << tc);
+
+	/* prio_type is link strict */
+	*prio_type = 0x2;
+}
+
+static void cxgb4_getpgtccfg_tx(struct net_device *dev, int tc,
+				u8 *prio_type, u8 *pgid, u8 *bw_per,
+				u8 *up_tc_map)
+{
+	return cxgb4_getpgtccfg(dev, tc, prio_type, pgid, bw_per, up_tc_map, 1);
+}
+
+
+static void cxgb4_getpgtccfg_rx(struct net_device *dev, int tc,
+				u8 *prio_type, u8 *pgid, u8 *bw_per,
+				u8 *up_tc_map)
+{
+	return cxgb4_getpgtccfg(dev, tc, prio_type, pgid, bw_per, up_tc_map, 0);
+}
+
+static void cxgb4_setpgtccfg_tx(struct net_device *dev, int tc,
+				u8 prio_type, u8 pgid, u8 bw_per,
+				u8 up_tc_map)
+{
+	struct fw_port_cmd pcmd;
+	struct port_info *pi = netdev2pinfo(dev);
+	struct adapter *adap = pi->adapter;
+	u32 _pgid;
+	int err;
+
+	if (pgid == DCB_ATTR_VALUE_UNDEFINED)
+		return;
+	if (bw_per == DCB_ATTR_VALUE_UNDEFINED)
+		return;
+
+	INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
+	pcmd.u.dcb.pgid.type = FW_PORT_DCB_TYPE_PGID;
+
+	err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+	if (err != FW_PORT_DCB_CFG_SUCCESS) {
+		dev_err(adap->pdev_dev, "DCB read PGID failed with %d\n", -err);
+		return;
+	}
+
+	_pgid = be32_to_cpu(pcmd.u.dcb.pgid.pgid);
+	_pgid &= ~(0xF << (tc * 4));
+	_pgid |= pgid << (tc * 4);
+	pcmd.u.dcb.pgid.pgid = cpu_to_be32(_pgid);
+
+	INIT_PORT_DCB_WRITE_CMD(pcmd, pi->port_id);
+
+	err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+	if (err != FW_PORT_DCB_CFG_SUCCESS) {
+		dev_err(adap->pdev_dev, "DCB write PGID failed with %d\n",
+			-err);
+		return;
+	}
+
+	memset(&pcmd, 0, sizeof(struct fw_port_cmd));
+
+	INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
+	pcmd.u.dcb.pgrate.type = FW_PORT_DCB_TYPE_PGRATE;
+
+	err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+	if (err != FW_PORT_DCB_CFG_SUCCESS) {
+		dev_err(adap->pdev_dev, "DCB read PGRATE failed with %d\n",
+			-err);
+		return;
+	}
+
+	pcmd.u.dcb.pgrate.pgrate[pgid] = bw_per;
+
+	INIT_PORT_DCB_WRITE_CMD(pcmd, pi->port_id);
+	if (pi->dcb.state == CXGB4_DCB_STATE_HOST)
+		pcmd.op_to_portid |= cpu_to_be32(FW_PORT_CMD_APPLY);
+
+	err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+	if (err != FW_PORT_DCB_CFG_SUCCESS)
+		dev_err(adap->pdev_dev, "DCB write PGRATE failed with %d\n",
+			-err);
+}
+
+static void cxgb4_getpgbwgcfg(struct net_device *dev, int pgid, u8 *bw_per,
+			      int local)
+{
+	struct fw_port_cmd pcmd;
+	struct port_info *pi = netdev2pinfo(dev);
+	struct adapter *adap = pi->adapter;
+	int err;
+
+	if (local)
+		INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
+	else
+		INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
+
+	pcmd.u.dcb.pgrate.type = FW_PORT_DCB_TYPE_PGRATE;
+	err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+	if (err != FW_PORT_DCB_CFG_SUCCESS) {
+		dev_err(adap->pdev_dev, "DCB read PGRATE failed with %d\n",
+			-err);
+	} else {
+		*bw_per = pcmd.u.dcb.pgrate.pgrate[pgid];
+	}
+}
+
+static void cxgb4_getpgbwgcfg_tx(struct net_device *dev, int pgid, u8 *bw_per)
+{
+	return cxgb4_getpgbwgcfg(dev, pgid, bw_per, 1);
+}
+
+static void cxgb4_getpgbwgcfg_rx(struct net_device *dev, int pgid, u8 *bw_per)
+{
+	return cxgb4_getpgbwgcfg(dev, pgid, bw_per, 0);
+}
+
+static void cxgb4_setpgbwgcfg_tx(struct net_device *dev, int pgid,
+				 u8 bw_per)
+{
+	struct fw_port_cmd pcmd;
+	struct port_info *pi = netdev2pinfo(dev);
+	struct adapter *adap = pi->adapter;
+	int err;
+
+	INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
+	pcmd.u.dcb.pgrate.type = FW_PORT_DCB_TYPE_PGRATE;
+
+	err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+	if (err != FW_PORT_DCB_CFG_SUCCESS) {
+		dev_err(adap->pdev_dev, "DCB read PGRATE failed with %d\n",
+			-err);
+		return;
+	}
+
+	pcmd.u.dcb.pgrate.pgrate[pgid] = bw_per;
+
+	INIT_PORT_DCB_WRITE_CMD(pcmd, pi->port_id);
+	if (pi->dcb.state == CXGB4_DCB_STATE_HOST)
+		pcmd.op_to_portid |= cpu_to_be32(FW_PORT_CMD_APPLY);
+
+	err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+
+	if (err != FW_PORT_DCB_CFG_SUCCESS)
+		dev_err(adap->pdev_dev, "DCB write PGRATE failed with %d\n",
+			-err);
+}
+
+/* Return whether the specified Traffic Class Priority has Priority Pause
+ * Frames enabled.
+ */
+static void cxgb4_getpfccfg(struct net_device *dev, int priority, u8 *pfccfg)
+{
+	struct port_info *pi = netdev2pinfo(dev);
+	struct port_dcb_info *dcb = &pi->dcb;
+
+	if (dcb->state != CXGB4_DCB_STATE_FW_ALLSYNCED ||
+	    priority >= CXGB4_MAX_PRIORITY)
+		*pfccfg = 0;
+	else
+		*pfccfg = (pi->dcb.pfcen >> priority) & 1;
+}
+
+/* Enable/disable Priority Pause Frames for the specified Traffic Class
+ * Priority.
+ */
+static void cxgb4_setpfccfg(struct net_device *dev, int priority, u8 pfccfg)
+{
+	struct fw_port_cmd pcmd;
+	struct port_info *pi = netdev2pinfo(dev);
+	struct adapter *adap = pi->adapter;
+	int err;
+
+	if (pi->dcb.state != CXGB4_DCB_STATE_FW_ALLSYNCED ||
+	    priority >= CXGB4_MAX_PRIORITY)
+		return;
+
+	INIT_PORT_DCB_WRITE_CMD(pcmd, pi->port_id);
+	if (pi->dcb.state == CXGB4_DCB_STATE_HOST)
+		pcmd.op_to_portid |= cpu_to_be32(FW_PORT_CMD_APPLY);
+
+	pcmd.u.dcb.pfc.type = FW_PORT_DCB_TYPE_PFC;
+	pcmd.u.dcb.pfc.pfcen = pi->dcb.pfcen;
+
+	if (pfccfg)
+		pcmd.u.dcb.pfc.pfcen |= (1 << priority);
+	else
+		pcmd.u.dcb.pfc.pfcen &= (~(1 << priority));
+
+	err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+	if (err != FW_PORT_DCB_CFG_SUCCESS) {
+		dev_err(adap->pdev_dev, "DCB PFC write failed with %d\n", -err);
+		return;
+	}
+
+	pi->dcb.pfcen = pcmd.u.dcb.pfc.pfcen;
+}
+
+static u8 cxgb4_setall(struct net_device *dev)
+{
+	return 0;
+}
+
+/* Return DCB capabilities.
+ */
+static u8 cxgb4_getcap(struct net_device *dev, int cap_id, u8 *caps)
+{
+	struct port_info *pi = netdev2pinfo(dev);
+
+	switch (cap_id) {
+	case DCB_CAP_ATTR_PG:
+	case DCB_CAP_ATTR_PFC:
+		*caps = true;
+		break;
+
+	case DCB_CAP_ATTR_PG_TCS:
+		/* 8 priorities for PG represented by bitmap */
+		*caps = 0x80;
+		break;
+
+	case DCB_CAP_ATTR_PFC_TCS:
+		/* 8 priorities for PFC represented by bitmap */
+		*caps = 0x80;
+		break;
+
+	case DCB_CAP_ATTR_GSP:
+		*caps = true;
+		break;
+
+	case DCB_CAP_ATTR_UP2TC:
+	case DCB_CAP_ATTR_BCN:
+		*caps = false;
+		break;
+
+	case DCB_CAP_ATTR_DCBX:
+		*caps = pi->dcb.supported;
+		break;
+
+	default:
+		*caps = false;
+	}
+
+	return 0;
+}
+
+/* Return the number of Traffic Classes for the indicated Traffic Class ID.
+ */
+static int cxgb4_getnumtcs(struct net_device *dev, int tcs_id, u8 *num)
+{
+	struct port_info *pi = netdev2pinfo(dev);
+
+	switch (tcs_id) {
+	case DCB_NUMTCS_ATTR_PG:
+		if (pi->dcb.msgs & CXGB4_DCB_FW_PGRATE)
+			*num = pi->dcb.pg_num_tcs_supported;
+		else
+			*num = 0x8;
+		break;
+
+	case DCB_NUMTCS_ATTR_PFC:
+		*num = 0x8;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/* Set the number of Traffic Classes supported for the indicated Traffic Class
+ * ID.
+ */
+static int cxgb4_setnumtcs(struct net_device *dev, int tcs_id, u8 num)
+{
+	/* Setting the number of Traffic Classes isn't supported.
+	 */
+	return -ENOSYS;
+}
+
+/* Return whether Priority Flow Control is enabled.  */
+static u8 cxgb4_getpfcstate(struct net_device *dev)
+{
+	struct port_info *pi = netdev2pinfo(dev);
+
+	if (pi->dcb.state != CXGB4_DCB_STATE_FW_ALLSYNCED)
+		return false;
+
+	return pi->dcb.pfcen != 0;
+}
+
+/* Enable/disable Priority Flow Control. */
+static void cxgb4_setpfcstate(struct net_device *dev, u8 state)
+{
+	/* We can't enable/disable Priority Flow Control but we also can't
+	 * return an error ...
+	 */
+}
+
+/* Return the Application User Priority Map associated with the specified
+ * Application ID.
+ */
+static int __cxgb4_getapp(struct net_device *dev, u8 app_idtype, u16 app_id,
+			  int peer)
+{
+	struct port_info *pi = netdev2pinfo(dev);
+	struct adapter *adap = pi->adapter;
+	int i;
+
+	if (pi->dcb.state != CXGB4_DCB_STATE_FW_ALLSYNCED)
+		return 0;
+
+	for (i = 0; i < CXGB4_MAX_DCBX_APP_SUPPORTED; i++) {
+		struct fw_port_cmd pcmd;
+		int err;
+
+		if (peer)
+			INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
+		else
+			INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
+
+		pcmd.u.dcb.app_priority.type = FW_PORT_DCB_TYPE_APP_ID;
+		pcmd.u.dcb.app_priority.idx = i;
+
+		err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+		if (err != FW_PORT_DCB_CFG_SUCCESS) {
+			dev_err(adap->pdev_dev, "DCB APP read failed with %d\n",
+				-err);
+			return err;
+		}
+		if (be16_to_cpu(pcmd.u.dcb.app_priority.protocolid) == app_id)
+			return pcmd.u.dcb.app_priority.user_prio_map;
+
+		/* exhausted app list */
+		if (!pcmd.u.dcb.app_priority.protocolid)
+			break;
+	}
+
+	return -EEXIST;
+}
+
+/* Return the Application User Priority Map associated with the specified
+ * Application ID.
+ */
+static int cxgb4_getapp(struct net_device *dev, u8 app_idtype, u16 app_id)
+{
+	return __cxgb4_getapp(dev, app_idtype, app_id, 0);
+}
+
+/* Write a new Application User Priority Map for the specified Application ID
+ */
+static int cxgb4_setapp(struct net_device *dev, u8 app_idtype, u16 app_id,
+			u8 app_prio)
+{
+	struct fw_port_cmd pcmd;
+	struct port_info *pi = netdev2pinfo(dev);
+	struct adapter *adap = pi->adapter;
+	int i, err;
+
+
+	if (pi->dcb.state != CXGB4_DCB_STATE_FW_ALLSYNCED)
+		return -EINVAL;
+
+	/* DCB info gets thrown away on link up */
+	if (!netif_carrier_ok(dev))
+		return -ENOLINK;
+
+	if (app_idtype != DCB_APP_IDTYPE_ETHTYPE &&
+	    app_idtype != DCB_APP_IDTYPE_PORTNUM)
+		return -EINVAL;
+
+	for (i = 0; i < CXGB4_MAX_DCBX_APP_SUPPORTED; i++) {
+		INIT_PORT_DCB_READ_LOCAL_CMD(pcmd, pi->port_id);
+		pcmd.u.dcb.app_priority.type = FW_PORT_DCB_TYPE_APP_ID;
+		pcmd.u.dcb.app_priority.idx = i;
+		err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+
+		if (err != FW_PORT_DCB_CFG_SUCCESS) {
+			dev_err(adap->pdev_dev, "DCB app table read failed with %d\n",
+				-err);
+			return err;
+		}
+		if (be16_to_cpu(pcmd.u.dcb.app_priority.protocolid) == app_id) {
+			/* overwrite existing app table */
+			pcmd.u.dcb.app_priority.protocolid = 0;
+			break;
+		}
+		/* find first empty slot */
+		if (!pcmd.u.dcb.app_priority.protocolid)
+			break;
+	}
+
+	if (i == CXGB4_MAX_DCBX_APP_SUPPORTED) {
+		/* no empty slots available */
+		dev_err(adap->pdev_dev, "DCB app table full\n");
+		return -EBUSY;
+	}
+
+	/* write out new app table entry */
+	INIT_PORT_DCB_WRITE_CMD(pcmd, pi->port_id);
+	if (pi->dcb.state == CXGB4_DCB_STATE_HOST)
+		pcmd.op_to_portid |= cpu_to_be32(FW_PORT_CMD_APPLY);
+
+	pcmd.u.dcb.app_priority.type = FW_PORT_DCB_TYPE_APP_ID;
+	pcmd.u.dcb.app_priority.protocolid = cpu_to_be16(app_id);
+	pcmd.u.dcb.app_priority.sel_field = app_idtype;
+	pcmd.u.dcb.app_priority.user_prio_map = app_prio;
+	pcmd.u.dcb.app_priority.idx = i;
+
+	err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+	if (err != FW_PORT_DCB_CFG_SUCCESS) {
+		dev_err(adap->pdev_dev, "DCB app table write failed with %d\n",
+			-err);
+		return err;
+	}
+
+	return 0;
+}
+
+/* Return whether IEEE Data Center Bridging has been negotiated.
+ */
+static inline int cxgb4_ieee_negotiation_complete(struct net_device *dev)
+{
+	struct port_info *pi = netdev2pinfo(dev);
+	struct port_dcb_info *dcb = &pi->dcb;
+
+	return (dcb->state == CXGB4_DCB_STATE_FW_ALLSYNCED &&
+		(dcb->supported & DCB_CAP_DCBX_VER_IEEE));
+}
+
+/* Fill in the Application User Priority Map associated with the
+ * specified Application.
+ */
+static int cxgb4_ieee_getapp(struct net_device *dev, struct dcb_app *app)
+{
+	int prio;
+
+	if (!cxgb4_ieee_negotiation_complete(dev))
+		return -EINVAL;
+	if (!(app->selector && app->protocol))
+		return -EINVAL;
+
+	prio = dcb_getapp(dev, app);
+	if (prio == 0) {
+		/* If app doesn't exist in dcb_app table, try firmware
+		 * directly.
+		 */
+		prio = __cxgb4_getapp(dev, app->selector, app->protocol, 0);
+	}
+
+	app->priority = prio;
+	return 0;
+}
+
+/* Write a new Application User Priority Map for the specified App id. */
+static int cxgb4_ieee_setapp(struct net_device *dev, struct dcb_app *app)
+{
+	if (!cxgb4_ieee_negotiation_complete(dev))
+		return -EINVAL;
+	if (!(app->selector && app->protocol && app->priority))
+		return -EINVAL;
+
+	cxgb4_setapp(dev, app->selector, app->protocol, app->priority);
+	return dcb_setapp(dev, app);
+}
+
+/* Return our DCBX parameters.
+ */
+static u8 cxgb4_getdcbx(struct net_device *dev)
+{
+	struct port_info *pi = netdev2pinfo(dev);
+
+	/* This is already set by cxgb4_set_dcb_caps, so just return it */
+	return pi->dcb.supported;
+}
+
+/* Set our DCBX parameters.
+ */
+static u8 cxgb4_setdcbx(struct net_device *dev, u8 dcb_request)
+{
+	struct port_info *pi = netdev2pinfo(dev);
+
+	/* Filter out requests which exceed our capabilities.
+	 */
+	if ((dcb_request & (CXGB4_DCBX_FW_SUPPORT | CXGB4_DCBX_HOST_SUPPORT))
+	    != dcb_request)
+		return 1;
+
+	/* Can't set DCBX capabilities if DCBX isn't enabled. */
+	if (!pi->dcb.state)
+		return 1;
+
+	/* There's currently no mechanism to allow for the firmware DCBX
+	 * negotiation to be changed from the Host Driver.  If the caller
+	 * requests exactly the same parameters that we already have then
+	 * we'll allow them to be successfully "set" ...
+	 */
+	if (dcb_request != pi->dcb.supported)
+		return 1;
+
+	pi->dcb.supported = dcb_request;
+	return 0;
+}
+
+static int cxgb4_getpeer_app(struct net_device *dev,
+			     struct dcb_peer_app_info *info, u16 *app_count)
+{
+	struct fw_port_cmd pcmd;
+	struct port_info *pi = netdev2pinfo(dev);
+	struct adapter *adap = pi->adapter;
+	int i, err = 0;
+
+	if (pi->dcb.state != CXGB4_DCB_STATE_FW_ALLSYNCED)
+		return 1;
+
+	info->willing = 0;
+	info->error = 0;
+
+	*app_count = 0;
+	for (i = 0; i < CXGB4_MAX_DCBX_APP_SUPPORTED; i++) {
+		INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
+		pcmd.u.dcb.app_priority.type = FW_PORT_DCB_TYPE_APP_ID;
+		pcmd.u.dcb.app_priority.idx = *app_count;
+		err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+
+		if (err != FW_PORT_DCB_CFG_SUCCESS) {
+			dev_err(adap->pdev_dev, "DCB app table read failed with %d\n",
+				-err);
+			return err;
+		}
+
+		/* find first empty slot */
+		if (!pcmd.u.dcb.app_priority.protocolid)
+			break;
+	}
+	*app_count = i;
+	return err;
+}
+
+static int cxgb4_getpeerapp_tbl(struct net_device *dev, struct dcb_app *table)
+{
+	struct fw_port_cmd pcmd;
+	struct port_info *pi = netdev2pinfo(dev);
+	struct adapter *adap = pi->adapter;
+	int i, err = 0;
+
+	if (pi->dcb.state != CXGB4_DCB_STATE_FW_ALLSYNCED)
+		return 1;
+
+	for (i = 0; i < CXGB4_MAX_DCBX_APP_SUPPORTED; i++) {
+		INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
+		pcmd.u.dcb.app_priority.type = FW_PORT_DCB_TYPE_APP_ID;
+		pcmd.u.dcb.app_priority.idx = i;
+		err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+
+		if (err != FW_PORT_DCB_CFG_SUCCESS) {
+			dev_err(adap->pdev_dev, "DCB app table read failed with %d\n",
+				-err);
+			return err;
+		}
+
+		/* find first empty slot */
+		if (!pcmd.u.dcb.app_priority.protocolid)
+			break;
+
+		table[i].selector = pcmd.u.dcb.app_priority.sel_field;
+		table[i].protocol =
+			be16_to_cpu(pcmd.u.dcb.app_priority.protocolid);
+		table[i].priority = pcmd.u.dcb.app_priority.user_prio_map;
+	}
+	return err;
+}
+
+/* Return Priority Group information.
+ */
+static int cxgb4_cee_peer_getpg(struct net_device *dev, struct cee_pg *pg)
+{
+	struct fw_port_cmd pcmd;
+	struct port_info *pi = netdev2pinfo(dev);
+	struct adapter *adap = pi->adapter;
+	u32 pgid;
+	int i, err;
+
+	/* We're always "willing" -- the Switch Fabric always dictates the
+	 * DCBX parameters to us.
+	 */
+	pg->willing = true;
+
+	INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
+	pcmd.u.dcb.pgid.type = FW_PORT_DCB_TYPE_PGID;
+	err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+	if (err != FW_PORT_DCB_CFG_SUCCESS) {
+		dev_err(adap->pdev_dev, "DCB read PGID failed with %d\n", -err);
+		return err;
+	}
+	pgid = be32_to_cpu(pcmd.u.dcb.pgid.pgid);
+
+	for (i = 0; i < CXGB4_MAX_PRIORITY; i++)
+		pg->prio_pg[i] = (pgid >> (i * 4)) & 0xF;
+
+	INIT_PORT_DCB_READ_PEER_CMD(pcmd, pi->port_id);
+	pcmd.u.dcb.pgrate.type = FW_PORT_DCB_TYPE_PGRATE;
+	err = t4_wr_mbox(adap, adap->mbox, &pcmd, sizeof(pcmd), &pcmd);
+	if (err != FW_PORT_DCB_CFG_SUCCESS) {
+		dev_err(adap->pdev_dev, "DCB read PGRATE failed with %d\n",
+			-err);
+		return err;
+	}
+
+	for (i = 0; i < CXGB4_MAX_PRIORITY; i++)
+		pg->pg_bw[i] = pcmd.u.dcb.pgrate.pgrate[i];
+
+	return 0;
+}
+
+/* Return Priority Flow Control information.
+ */
+static int cxgb4_cee_peer_getpfc(struct net_device *dev, struct cee_pfc *pfc)
+{
+	struct port_info *pi = netdev2pinfo(dev);
+
+	cxgb4_getnumtcs(dev, DCB_NUMTCS_ATTR_PFC, &(pfc->tcs_supported));
+	pfc->pfc_en = pi->dcb.pfcen;
+
+	return 0;
+}
+
+const struct dcbnl_rtnl_ops cxgb4_dcb_ops = {
+	.ieee_getapp		= cxgb4_ieee_getapp,
+	.ieee_setapp		= cxgb4_ieee_setapp,
+
+	/* CEE std */
+	.getstate		= cxgb4_getstate,
+	.setstate		= cxgb4_setstate,
+	.getpgtccfgtx		= cxgb4_getpgtccfg_tx,
+	.getpgbwgcfgtx		= cxgb4_getpgbwgcfg_tx,
+	.getpgtccfgrx		= cxgb4_getpgtccfg_rx,
+	.getpgbwgcfgrx		= cxgb4_getpgbwgcfg_rx,
+	.setpgtccfgtx		= cxgb4_setpgtccfg_tx,
+	.setpgbwgcfgtx		= cxgb4_setpgbwgcfg_tx,
+	.setpfccfg		= cxgb4_setpfccfg,
+	.getpfccfg		= cxgb4_getpfccfg,
+	.setall			= cxgb4_setall,
+	.getcap			= cxgb4_getcap,
+	.getnumtcs		= cxgb4_getnumtcs,
+	.setnumtcs		= cxgb4_setnumtcs,
+	.getpfcstate		= cxgb4_getpfcstate,
+	.setpfcstate		= cxgb4_setpfcstate,
+	.getapp			= cxgb4_getapp,
+	.setapp			= cxgb4_setapp,
+
+	/* DCBX configuration */
+	.getdcbx		= cxgb4_getdcbx,
+	.setdcbx		= cxgb4_setdcbx,
+
+	/* peer apps */
+	.peer_getappinfo	= cxgb4_getpeer_app,
+	.peer_getapptable	= cxgb4_getpeerapp_tbl,
+
+	/* CEE peer */
+	.cee_peer_getpg		= cxgb4_cee_peer_getpg,
+	.cee_peer_getpfc	= cxgb4_cee_peer_getpfc,
+};