Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 1690 insertions, 0 deletions

diff --git a/drivers/scsi/csiostor/csio_mb.c b/drivers/scsi/csiostor/csio_mb.c
new file mode 100644
index 000000000..94810b19e
--- /dev/null
+++ b/drivers/scsi/csiostor/csio_mb.c
@@ -0,0 +1,1690 @@
+/*
+ * This file is part of the Chelsio FCoE driver for Linux.
+ *
+ * Copyright (c) 2008-2012 Chelsio Communications, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *      - Redistributions of source code must retain the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer.
+ *
+ *      - Redistributions in binary form must reproduce the above
+ *        copyright notice, this list of conditions and the following
+ *        disclaimer in the documentation and/or other materials
+ *        provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/delay.h>
+#include <linux/jiffies.h>
+#include <linux/string.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_transport_fc.h>
+
+#include "csio_hw.h"
+#include "csio_lnode.h"
+#include "csio_rnode.h"
+#include "csio_mb.h"
+#include "csio_wr.h"
+
+#define csio_mb_is_host_owner(__owner)		((__owner) == CSIO_MBOWNER_PL)
+
+/* MB Command/Response Helpers */
+/*
+ * csio_mb_fw_retval - FW return value from a mailbox response.
+ * @mbp: Mailbox structure
+ *
+ */
+enum fw_retval
+csio_mb_fw_retval(struct csio_mb *mbp)
+{
+	struct fw_cmd_hdr *hdr;
+
+	hdr = (struct fw_cmd_hdr *)(mbp->mb);
+
+	return FW_CMD_RETVAL_G(ntohl(hdr->lo));
+}
+
+/*
+ * csio_mb_hello - FW HELLO command helper
+ * @hw: The HW structure
+ * @mbp: Mailbox structure
+ * @m_mbox: Master mailbox number, if any.
+ * @a_mbox: Mailbox number for asycn notifications.
+ * @master: Device mastership.
+ * @cbfn: Callback, if any.
+ *
+ */
+void
+csio_mb_hello(struct csio_hw *hw, struct csio_mb *mbp, uint32_t tmo,
+	      uint32_t m_mbox, uint32_t a_mbox, enum csio_dev_master master,
+	      void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_hello_cmd *cmdp = (struct fw_hello_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, tmo, hw, cbfn, 1);
+
+	cmdp->op_to_write = htonl(FW_CMD_OP_V(FW_HELLO_CMD) |
+				       FW_CMD_REQUEST_F | FW_CMD_WRITE_F);
+	cmdp->retval_len16 = htonl(FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+	cmdp->err_to_clearinit = htonl(
+		FW_HELLO_CMD_MASTERDIS_V(master == CSIO_MASTER_CANT)	|
+		FW_HELLO_CMD_MASTERFORCE_V(master == CSIO_MASTER_MUST)	|
+		FW_HELLO_CMD_MBMASTER_V(master == CSIO_MASTER_MUST ?
+				m_mbox : FW_HELLO_CMD_MBMASTER_M)	|
+		FW_HELLO_CMD_MBASYNCNOT_V(a_mbox) |
+		FW_HELLO_CMD_STAGE_V(fw_hello_cmd_stage_os) |
+		FW_HELLO_CMD_CLEARINIT_F);
+
+}
+
+/*
+ * csio_mb_process_hello_rsp - FW HELLO response processing helper
+ * @hw: The HW structure
+ * @mbp: Mailbox structure
+ * @retval: Mailbox return value from Firmware
+ * @state: State that the function is in.
+ * @mpfn: Master pfn
+ *
+ */
+void
+csio_mb_process_hello_rsp(struct csio_hw *hw, struct csio_mb *mbp,
+			  enum fw_retval *retval, enum csio_dev_state *state,
+			  uint8_t *mpfn)
+{
+	struct fw_hello_cmd *rsp = (struct fw_hello_cmd *)(mbp->mb);
+	uint32_t value;
+
+	*retval = FW_CMD_RETVAL_G(ntohl(rsp->retval_len16));
+
+	if (*retval == FW_SUCCESS) {
+		hw->fwrev = ntohl(rsp->fwrev);
+
+		value = ntohl(rsp->err_to_clearinit);
+		*mpfn = FW_HELLO_CMD_MBMASTER_G(value);
+
+		if (value & FW_HELLO_CMD_INIT_F)
+			*state = CSIO_DEV_STATE_INIT;
+		else if (value & FW_HELLO_CMD_ERR_F)
+			*state = CSIO_DEV_STATE_ERR;
+		else
+			*state = CSIO_DEV_STATE_UNINIT;
+	}
+}
+
+/*
+ * csio_mb_bye - FW BYE command helper
+ * @hw: The HW structure
+ * @mbp: Mailbox structure
+ * @cbfn: Callback, if any.
+ *
+ */
+void
+csio_mb_bye(struct csio_hw *hw, struct csio_mb *mbp, uint32_t tmo,
+	    void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_bye_cmd *cmdp = (struct fw_bye_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, tmo, hw, cbfn, 1);
+
+	cmdp->op_to_write = htonl(FW_CMD_OP_V(FW_BYE_CMD) |
+				       FW_CMD_REQUEST_F | FW_CMD_WRITE_F);
+	cmdp->retval_len16 = htonl(FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+
+}
+
+/*
+ * csio_mb_reset - FW RESET command helper
+ * @hw: The HW structure
+ * @mbp: Mailbox structure
+ * @reset: Type of reset.
+ * @cbfn: Callback, if any.
+ *
+ */
+void
+csio_mb_reset(struct csio_hw *hw, struct csio_mb *mbp, uint32_t tmo,
+	      int reset, int halt,
+	      void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_reset_cmd *cmdp = (struct fw_reset_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, tmo, hw, cbfn, 1);
+
+	cmdp->op_to_write = htonl(FW_CMD_OP_V(FW_RESET_CMD) |
+				  FW_CMD_REQUEST_F | FW_CMD_WRITE_F);
+	cmdp->retval_len16 = htonl(FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+	cmdp->val = htonl(reset);
+	cmdp->halt_pkd = htonl(halt);
+
+}
+
+/*
+ * csio_mb_params - FW PARAMS command helper
+ * @hw: The HW structure
+ * @mbp: Mailbox structure
+ * @tmo: Command timeout.
+ * @pf: PF number.
+ * @vf: VF number.
+ * @nparams: Number of parameters
+ * @params: Parameter mnemonic array.
+ * @val: Parameter value array.
+ * @wr: Write/Read PARAMS.
+ * @cbfn: Callback, if any.
+ *
+ */
+void
+csio_mb_params(struct csio_hw *hw, struct csio_mb *mbp, uint32_t tmo,
+	       unsigned int pf, unsigned int vf, unsigned int nparams,
+	       const u32 *params, u32 *val, bool wr,
+	       void (*cbfn)(struct csio_hw *, struct csio_mb *))
+{
+	uint32_t i;
+	uint32_t temp_params = 0, temp_val = 0;
+	struct fw_params_cmd *cmdp = (struct fw_params_cmd *)(mbp->mb);
+	__be32 *p = &cmdp->param[0].mnem;
+
+	CSIO_INIT_MBP(mbp, cmdp, tmo, hw, cbfn, 1);
+
+	cmdp->op_to_vfn = htonl(FW_CMD_OP_V(FW_PARAMS_CMD)		|
+				FW_CMD_REQUEST_F			|
+				(wr ? FW_CMD_WRITE_F : FW_CMD_READ_F)	|
+				FW_PARAMS_CMD_PFN_V(pf)			|
+				FW_PARAMS_CMD_VFN_V(vf));
+	cmdp->retval_len16 = htonl(FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+
+	/* Write Params */
+	if (wr) {
+		while (nparams--) {
+			temp_params = *params++;
+			temp_val = *val++;
+
+			*p++ = htonl(temp_params);
+			*p++ = htonl(temp_val);
+		}
+	} else {
+		for (i = 0; i < nparams; i++, p += 2) {
+			temp_params = *params++;
+			*p = htonl(temp_params);
+		}
+	}
+
+}
+
+/*
+ * csio_mb_process_read_params_rsp - FW PARAMS response processing helper
+ * @hw: The HW structure
+ * @mbp: Mailbox structure
+ * @retval: Mailbox return value from Firmware
+ * @nparams: Number of parameters
+ * @val: Parameter value array.
+ *
+ */
+void
+csio_mb_process_read_params_rsp(struct csio_hw *hw, struct csio_mb *mbp,
+			   enum fw_retval *retval, unsigned int nparams,
+			   u32 *val)
+{
+	struct fw_params_cmd *rsp = (struct fw_params_cmd *)(mbp->mb);
+	uint32_t i;
+	__be32 *p = &rsp->param[0].val;
+
+	*retval = FW_CMD_RETVAL_G(ntohl(rsp->retval_len16));
+
+	if (*retval == FW_SUCCESS)
+		for (i = 0; i < nparams; i++, p += 2)
+			*val++ = ntohl(*p);
+}
+
+/*
+ * csio_mb_ldst - FW LDST command
+ * @hw: The HW structure
+ * @mbp: Mailbox structure
+ * @tmo: timeout
+ * @reg: register
+ *
+ */
+void
+csio_mb_ldst(struct csio_hw *hw, struct csio_mb *mbp, uint32_t tmo, int reg)
+{
+	struct fw_ldst_cmd *ldst_cmd = (struct fw_ldst_cmd *)(mbp->mb);
+	CSIO_INIT_MBP(mbp, ldst_cmd, tmo, hw, NULL, 1);
+
+	/*
+	 * Construct and send the Firmware LDST Command to retrieve the
+	 * specified PCI-E Configuration Space register.
+	 */
+	ldst_cmd->op_to_addrspace =
+			htonl(FW_CMD_OP_V(FW_LDST_CMD)	|
+			FW_CMD_REQUEST_F			|
+			FW_CMD_READ_F			|
+			FW_LDST_CMD_ADDRSPACE_V(FW_LDST_ADDRSPC_FUNC_PCIE));
+	ldst_cmd->cycles_to_len16 = htonl(FW_LEN16(struct fw_ldst_cmd));
+	ldst_cmd->u.pcie.select_naccess = FW_LDST_CMD_NACCESS_V(1);
+	ldst_cmd->u.pcie.ctrl_to_fn =
+		(FW_LDST_CMD_LC_F | FW_LDST_CMD_FN_V(hw->pfn));
+	ldst_cmd->u.pcie.r = (uint8_t)reg;
+}
+
+/*
+ *
+ * csio_mb_caps_config - FW Read/Write Capabilities command helper
+ * @hw: The HW structure
+ * @mbp: Mailbox structure
+ * @wr: Write if 1, Read if 0
+ * @init: Turn on initiator mode.
+ * @tgt: Turn on target mode.
+ * @cofld:  If 1, Control Offload for FCoE
+ * @cbfn: Callback, if any.
+ *
+ * This helper assumes that cmdp has MB payload from a previous CAPS
+ * read command.
+ */
+void
+csio_mb_caps_config(struct csio_hw *hw, struct csio_mb *mbp, uint32_t tmo,
+		    bool wr, bool init, bool tgt, bool cofld,
+		    void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_caps_config_cmd *cmdp =
+				(struct fw_caps_config_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, tmo, hw, cbfn, wr ? 0 : 1);
+
+	cmdp->op_to_write = htonl(FW_CMD_OP_V(FW_CAPS_CONFIG_CMD) |
+				  FW_CMD_REQUEST_F		|
+				  (wr ? FW_CMD_WRITE_F : FW_CMD_READ_F));
+	cmdp->cfvalid_to_len16 = htonl(FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+
+	/* Read config */
+	if (!wr)
+		return;
+
+	/* Write config */
+	cmdp->fcoecaps = 0;
+
+	if (cofld)
+		cmdp->fcoecaps |= htons(FW_CAPS_CONFIG_FCOE_CTRL_OFLD);
+	if (init)
+		cmdp->fcoecaps |= htons(FW_CAPS_CONFIG_FCOE_INITIATOR);
+	if (tgt)
+		cmdp->fcoecaps |= htons(FW_CAPS_CONFIG_FCOE_TARGET);
+}
+
+/*
+ * csio_mb_port- FW PORT command helper
+ * @hw: The HW structure
+ * @mbp: Mailbox structure
+ * @tmo: COmmand timeout
+ * @portid: Port ID to get/set info
+ * @wr: Write/Read PORT information.
+ * @fc: Flow control
+ * @caps: Port capabilites to set.
+ * @cbfn: Callback, if any.
+ *
+ */
+void
+csio_mb_port(struct csio_hw *hw, struct csio_mb *mbp, uint32_t tmo,
+	     u8 portid, bool wr, uint32_t fc, uint16_t fw_caps,
+	     void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_port_cmd *cmdp = (struct fw_port_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, tmo, hw, cbfn,  1);
+
+	cmdp->op_to_portid = htonl(FW_CMD_OP_V(FW_PORT_CMD)		|
+				   FW_CMD_REQUEST_F			|
+				   (wr ? FW_CMD_EXEC_F : FW_CMD_READ_F)	|
+				   FW_PORT_CMD_PORTID_V(portid));
+	if (!wr) {
+		cmdp->action_to_len16 = htonl(
+			FW_PORT_CMD_ACTION_V(fw_caps == FW_CAPS16
+			? FW_PORT_ACTION_GET_PORT_INFO
+			: FW_PORT_ACTION_GET_PORT_INFO32) |
+			FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+		return;
+	}
+
+	/* Set port */
+	cmdp->action_to_len16 = htonl(
+			FW_PORT_CMD_ACTION_V(fw_caps == FW_CAPS16
+			? FW_PORT_ACTION_L1_CFG
+			: FW_PORT_ACTION_L1_CFG32) |
+			FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+
+	if (fw_caps == FW_CAPS16)
+		cmdp->u.l1cfg.rcap = cpu_to_be32(fwcaps32_to_caps16(fc));
+	else
+		cmdp->u.l1cfg32.rcap32 = cpu_to_be32(fc);
+}
+
+/*
+ * csio_mb_process_read_port_rsp - FW PORT command response processing helper
+ * @hw: The HW structure
+ * @mbp: Mailbox structure
+ * @retval: Mailbox return value from Firmware
+ * @caps: port capabilities
+ *
+ */
+void
+csio_mb_process_read_port_rsp(struct csio_hw *hw, struct csio_mb *mbp,
+			 enum fw_retval *retval, uint16_t fw_caps,
+			 u32 *pcaps, u32 *acaps)
+{
+	struct fw_port_cmd *rsp = (struct fw_port_cmd *)(mbp->mb);
+
+	*retval = FW_CMD_RETVAL_G(ntohl(rsp->action_to_len16));
+
+	if (*retval == FW_SUCCESS) {
+		if (fw_caps == FW_CAPS16) {
+			*pcaps = fwcaps16_to_caps32(ntohs(rsp->u.info.pcap));
+			*acaps = fwcaps16_to_caps32(ntohs(rsp->u.info.acap));
+		} else {
+			*pcaps = be32_to_cpu(rsp->u.info32.pcaps32);
+			*acaps = be32_to_cpu(rsp->u.info32.acaps32);
+		}
+	}
+}
+
+/*
+ * csio_mb_initialize - FW INITIALIZE command helper
+ * @hw: The HW structure
+ * @mbp: Mailbox structure
+ * @tmo: COmmand timeout
+ * @cbfn: Callback, if any.
+ *
+ */
+void
+csio_mb_initialize(struct csio_hw *hw, struct csio_mb *mbp, uint32_t tmo,
+		   void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_initialize_cmd *cmdp = (struct fw_initialize_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, tmo, hw, cbfn, 1);
+
+	cmdp->op_to_write = htonl(FW_CMD_OP_V(FW_INITIALIZE_CMD)	|
+				  FW_CMD_REQUEST_F | FW_CMD_WRITE_F);
+	cmdp->retval_len16 = htonl(FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+
+}
+
+/*
+ * csio_mb_iq_alloc - Initializes the mailbox to allocate an
+ *				Ingress DMA queue in the firmware.
+ *
+ * @hw: The hw structure
+ * @mbp: Mailbox structure to initialize
+ * @priv: Private object
+ * @mb_tmo: Mailbox time-out period (in ms).
+ * @iq_params: Ingress queue params needed for allocation.
+ * @cbfn: The call-back function
+ *
+ *
+ */
+static void
+csio_mb_iq_alloc(struct csio_hw *hw, struct csio_mb *mbp, void *priv,
+		 uint32_t mb_tmo, struct csio_iq_params *iq_params,
+		 void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_iq_cmd *cmdp = (struct fw_iq_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, mb_tmo, priv, cbfn, 1);
+
+	cmdp->op_to_vfn = htonl(FW_CMD_OP_V(FW_IQ_CMD)		|
+				FW_CMD_REQUEST_F | FW_CMD_EXEC_F	|
+				FW_IQ_CMD_PFN_V(iq_params->pfn)	|
+				FW_IQ_CMD_VFN_V(iq_params->vfn));
+
+	cmdp->alloc_to_len16 = htonl(FW_IQ_CMD_ALLOC_F		|
+				FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+
+	cmdp->type_to_iqandstindex = htonl(
+				FW_IQ_CMD_VIID_V(iq_params->viid)	|
+				FW_IQ_CMD_TYPE_V(iq_params->type)	|
+				FW_IQ_CMD_IQASYNCH_V(iq_params->iqasynch));
+
+	cmdp->fl0size = htons(iq_params->fl0size);
+	cmdp->fl0size = htons(iq_params->fl1size);
+
+} /* csio_mb_iq_alloc */
+
+/*
+ * csio_mb_iq_write - Initializes the mailbox for writing into an
+ *				Ingress DMA Queue.
+ *
+ * @hw: The HW structure
+ * @mbp: Mailbox structure to initialize
+ * @priv: Private object
+ * @mb_tmo: Mailbox time-out period (in ms).
+ * @cascaded_req: TRUE - if this request is cascased with iq-alloc request.
+ * @iq_params: Ingress queue params needed for writing.
+ * @cbfn: The call-back function
+ *
+ * NOTE: We OR relevant bits with cmdp->XXX, instead of just equating,
+ * because this IQ write request can be cascaded with a previous
+ * IQ alloc request, and we dont want to over-write the bits set by
+ * that request. This logic will work even in a non-cascaded case, since the
+ * cmdp structure is zeroed out by CSIO_INIT_MBP.
+ */
+static void
+csio_mb_iq_write(struct csio_hw *hw, struct csio_mb *mbp, void *priv,
+		 uint32_t mb_tmo, bool cascaded_req,
+		 struct csio_iq_params *iq_params,
+		 void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_iq_cmd *cmdp = (struct fw_iq_cmd *)(mbp->mb);
+
+	uint32_t iq_start_stop = (iq_params->iq_start)	?
+					FW_IQ_CMD_IQSTART_F :
+					FW_IQ_CMD_IQSTOP_F;
+	int relaxed = !(hw->flags & CSIO_HWF_ROOT_NO_RELAXED_ORDERING);
+
+	/*
+	 * If this IQ write is cascaded with IQ alloc request, do not
+	 * re-initialize with 0's.
+	 *
+	 */
+	if (!cascaded_req)
+		CSIO_INIT_MBP(mbp, cmdp, mb_tmo, priv, cbfn, 1);
+
+	cmdp->op_to_vfn |= htonl(FW_CMD_OP_V(FW_IQ_CMD)		|
+				FW_CMD_REQUEST_F | FW_CMD_WRITE_F	|
+				FW_IQ_CMD_PFN_V(iq_params->pfn)	|
+				FW_IQ_CMD_VFN_V(iq_params->vfn));
+	cmdp->alloc_to_len16 |= htonl(iq_start_stop |
+				FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+	cmdp->iqid |= htons(iq_params->iqid);
+	cmdp->fl0id |= htons(iq_params->fl0id);
+	cmdp->fl1id |= htons(iq_params->fl1id);
+	cmdp->type_to_iqandstindex |= htonl(
+			FW_IQ_CMD_IQANDST_V(iq_params->iqandst)	|
+			FW_IQ_CMD_IQANUS_V(iq_params->iqanus)	|
+			FW_IQ_CMD_IQANUD_V(iq_params->iqanud)	|
+			FW_IQ_CMD_IQANDSTINDEX_V(iq_params->iqandstindex));
+	cmdp->iqdroprss_to_iqesize |= htons(
+			FW_IQ_CMD_IQPCIECH_V(iq_params->iqpciech)	|
+			FW_IQ_CMD_IQDCAEN_V(iq_params->iqdcaen)		|
+			FW_IQ_CMD_IQDCACPU_V(iq_params->iqdcacpu)	|
+			FW_IQ_CMD_IQINTCNTTHRESH_V(iq_params->iqintcntthresh) |
+			FW_IQ_CMD_IQCPRIO_V(iq_params->iqcprio)		|
+			FW_IQ_CMD_IQESIZE_V(iq_params->iqesize));
+
+	cmdp->iqsize |= htons(iq_params->iqsize);
+	cmdp->iqaddr |= cpu_to_be64(iq_params->iqaddr);
+
+	if (iq_params->type == 0) {
+		cmdp->iqns_to_fl0congen |= htonl(
+			FW_IQ_CMD_IQFLINTIQHSEN_V(iq_params->iqflintiqhsen)|
+			FW_IQ_CMD_IQFLINTCONGEN_V(iq_params->iqflintcongen));
+	}
+
+	if (iq_params->fl0size && iq_params->fl0addr &&
+	    (iq_params->fl0id != 0xFFFF)) {
+
+		cmdp->iqns_to_fl0congen |= htonl(
+			FW_IQ_CMD_FL0HOSTFCMODE_V(iq_params->fl0hostfcmode)|
+			FW_IQ_CMD_FL0CPRIO_V(iq_params->fl0cprio)	|
+			FW_IQ_CMD_FL0FETCHRO_V(relaxed)			|
+			FW_IQ_CMD_FL0DATARO_V(relaxed)			|
+			FW_IQ_CMD_FL0PADEN_V(iq_params->fl0paden)	|
+			FW_IQ_CMD_FL0PACKEN_V(iq_params->fl0packen));
+		cmdp->fl0dcaen_to_fl0cidxfthresh |= htons(
+			FW_IQ_CMD_FL0DCAEN_V(iq_params->fl0dcaen)	|
+			FW_IQ_CMD_FL0DCACPU_V(iq_params->fl0dcacpu)	|
+			FW_IQ_CMD_FL0FBMIN_V(iq_params->fl0fbmin)	|
+			FW_IQ_CMD_FL0FBMAX_V(iq_params->fl0fbmax)	|
+			FW_IQ_CMD_FL0CIDXFTHRESH_V(iq_params->fl0cidxfthresh));
+		cmdp->fl0size |= htons(iq_params->fl0size);
+		cmdp->fl0addr |= cpu_to_be64(iq_params->fl0addr);
+	}
+} /* csio_mb_iq_write */
+
+/*
+ * csio_mb_iq_alloc_write - Initializes the mailbox for allocating an
+ *				Ingress DMA Queue.
+ *
+ * @hw: The HW structure
+ * @mbp: Mailbox structure to initialize
+ * @priv: Private data.
+ * @mb_tmo: Mailbox time-out period (in ms).
+ * @iq_params: Ingress queue params needed for allocation & writing.
+ * @cbfn: The call-back function
+ *
+ *
+ */
+void
+csio_mb_iq_alloc_write(struct csio_hw *hw, struct csio_mb *mbp, void *priv,
+		       uint32_t mb_tmo, struct csio_iq_params *iq_params,
+		       void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	csio_mb_iq_alloc(hw, mbp, priv, mb_tmo, iq_params, cbfn);
+	csio_mb_iq_write(hw, mbp, priv, mb_tmo, true, iq_params, cbfn);
+} /* csio_mb_iq_alloc_write */
+
+/*
+ * csio_mb_iq_alloc_write_rsp - Process the allocation & writing
+ *				of ingress DMA queue mailbox's response.
+ *
+ * @hw: The HW structure.
+ * @mbp: Mailbox structure to initialize.
+ * @retval: Firmware return value.
+ * @iq_params: Ingress queue parameters, after allocation and write.
+ *
+ */
+void
+csio_mb_iq_alloc_write_rsp(struct csio_hw *hw, struct csio_mb *mbp,
+			   enum fw_retval *ret_val,
+			   struct csio_iq_params *iq_params)
+{
+	struct fw_iq_cmd *rsp = (struct fw_iq_cmd *)(mbp->mb);
+
+	*ret_val = FW_CMD_RETVAL_G(ntohl(rsp->alloc_to_len16));
+	if (*ret_val == FW_SUCCESS) {
+		iq_params->physiqid = ntohs(rsp->physiqid);
+		iq_params->iqid = ntohs(rsp->iqid);
+		iq_params->fl0id = ntohs(rsp->fl0id);
+		iq_params->fl1id = ntohs(rsp->fl1id);
+	} else {
+		iq_params->physiqid = iq_params->iqid =
+		iq_params->fl0id = iq_params->fl1id = 0;
+	}
+} /* csio_mb_iq_alloc_write_rsp */
+
+/*
+ * csio_mb_iq_free - Initializes the mailbox for freeing a
+ *				specified Ingress DMA Queue.
+ *
+ * @hw: The HW structure
+ * @mbp: Mailbox structure to initialize
+ * @priv: Private data
+ * @mb_tmo: Mailbox time-out period (in ms).
+ * @iq_params: Parameters of ingress queue, that is to be freed.
+ * @cbfn: The call-back function
+ *
+ *
+ */
+void
+csio_mb_iq_free(struct csio_hw *hw, struct csio_mb *mbp, void *priv,
+		uint32_t mb_tmo, struct csio_iq_params *iq_params,
+		void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_iq_cmd *cmdp = (struct fw_iq_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, mb_tmo, priv, cbfn, 1);
+
+	cmdp->op_to_vfn = htonl(FW_CMD_OP_V(FW_IQ_CMD)		|
+				FW_CMD_REQUEST_F | FW_CMD_EXEC_F	|
+				FW_IQ_CMD_PFN_V(iq_params->pfn)	|
+				FW_IQ_CMD_VFN_V(iq_params->vfn));
+	cmdp->alloc_to_len16 = htonl(FW_IQ_CMD_FREE_F		|
+				FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+	cmdp->type_to_iqandstindex = htonl(FW_IQ_CMD_TYPE_V(iq_params->type));
+
+	cmdp->iqid = htons(iq_params->iqid);
+	cmdp->fl0id = htons(iq_params->fl0id);
+	cmdp->fl1id = htons(iq_params->fl1id);
+
+} /* csio_mb_iq_free */
+
+/*
+ * csio_mb_eq_ofld_alloc - Initializes the mailbox for allocating
+ *				an offload-egress queue.
+ *
+ * @hw: The HW  structure
+ * @mbp: Mailbox structure to initialize
+ * @priv: Private data
+ * @mb_tmo: Mailbox time-out period (in ms).
+ * @eq_ofld_params: (Offload) Egress queue parameters.
+ * @cbfn: The call-back function
+ *
+ *
+ */
+static void
+csio_mb_eq_ofld_alloc(struct csio_hw *hw, struct csio_mb *mbp, void *priv,
+		uint32_t mb_tmo, struct csio_eq_params *eq_ofld_params,
+		void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_eq_ofld_cmd *cmdp = (struct fw_eq_ofld_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, mb_tmo, priv, cbfn, 1);
+	cmdp->op_to_vfn = htonl(FW_CMD_OP_V(FW_EQ_OFLD_CMD)		|
+				FW_CMD_REQUEST_F | FW_CMD_EXEC_F	|
+				FW_EQ_OFLD_CMD_PFN_V(eq_ofld_params->pfn) |
+				FW_EQ_OFLD_CMD_VFN_V(eq_ofld_params->vfn));
+	cmdp->alloc_to_len16 = htonl(FW_EQ_OFLD_CMD_ALLOC_F	|
+				FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+
+} /* csio_mb_eq_ofld_alloc */
+
+/*
+ * csio_mb_eq_ofld_write - Initializes the mailbox for writing
+ *				an alloacted offload-egress queue.
+ *
+ * @hw: The HW structure
+ * @mbp: Mailbox structure to initialize
+ * @priv: Private data
+ * @mb_tmo: Mailbox time-out period (in ms).
+ * @cascaded_req: TRUE - if this request is cascased with Eq-alloc request.
+ * @eq_ofld_params: (Offload) Egress queue parameters.
+ * @cbfn: The call-back function
+ *
+ *
+ * NOTE: We OR relevant bits with cmdp->XXX, instead of just equating,
+ * because this EQ write request can be cascaded with a previous
+ * EQ alloc request, and we dont want to over-write the bits set by
+ * that request. This logic will work even in a non-cascaded case, since the
+ * cmdp structure is zeroed out by CSIO_INIT_MBP.
+ */
+static void
+csio_mb_eq_ofld_write(struct csio_hw *hw, struct csio_mb *mbp, void *priv,
+		      uint32_t mb_tmo, bool cascaded_req,
+		      struct csio_eq_params *eq_ofld_params,
+		      void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_eq_ofld_cmd *cmdp = (struct fw_eq_ofld_cmd *)(mbp->mb);
+
+	uint32_t eq_start_stop = (eq_ofld_params->eqstart)	?
+				FW_EQ_OFLD_CMD_EQSTART_F :
+				FW_EQ_OFLD_CMD_EQSTOP_F;
+
+	/*
+	 * If this EQ write is cascaded with EQ alloc request, do not
+	 * re-initialize with 0's.
+	 *
+	 */
+	if (!cascaded_req)
+		CSIO_INIT_MBP(mbp, cmdp, mb_tmo, priv, cbfn, 1);
+
+	cmdp->op_to_vfn |= htonl(FW_CMD_OP_V(FW_EQ_OFLD_CMD)	|
+				FW_CMD_REQUEST_F | FW_CMD_WRITE_F	|
+				FW_EQ_OFLD_CMD_PFN_V(eq_ofld_params->pfn) |
+				FW_EQ_OFLD_CMD_VFN_V(eq_ofld_params->vfn));
+	cmdp->alloc_to_len16 |= htonl(eq_start_stop		|
+				      FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+
+	cmdp->eqid_pkd |= htonl(FW_EQ_OFLD_CMD_EQID_V(eq_ofld_params->eqid));
+
+	cmdp->fetchszm_to_iqid |= htonl(
+		FW_EQ_OFLD_CMD_HOSTFCMODE_V(eq_ofld_params->hostfcmode)	|
+		FW_EQ_OFLD_CMD_CPRIO_V(eq_ofld_params->cprio)		|
+		FW_EQ_OFLD_CMD_PCIECHN_V(eq_ofld_params->pciechn)	|
+		FW_EQ_OFLD_CMD_IQID_V(eq_ofld_params->iqid));
+
+	cmdp->dcaen_to_eqsize |= htonl(
+		FW_EQ_OFLD_CMD_DCAEN_V(eq_ofld_params->dcaen)		|
+		FW_EQ_OFLD_CMD_DCACPU_V(eq_ofld_params->dcacpu)		|
+		FW_EQ_OFLD_CMD_FBMIN_V(eq_ofld_params->fbmin)		|
+		FW_EQ_OFLD_CMD_FBMAX_V(eq_ofld_params->fbmax)		|
+		FW_EQ_OFLD_CMD_CIDXFTHRESHO_V(eq_ofld_params->cidxfthresho) |
+		FW_EQ_OFLD_CMD_CIDXFTHRESH_V(eq_ofld_params->cidxfthresh) |
+		FW_EQ_OFLD_CMD_EQSIZE_V(eq_ofld_params->eqsize));
+
+	cmdp->eqaddr |= cpu_to_be64(eq_ofld_params->eqaddr);
+
+} /* csio_mb_eq_ofld_write */
+
+/*
+ * csio_mb_eq_ofld_alloc_write - Initializes the mailbox for allocation
+ *				writing into an Engress DMA Queue.
+ *
+ * @hw: The HW structure
+ * @mbp: Mailbox structure to initialize
+ * @priv: Private data.
+ * @mb_tmo: Mailbox time-out period (in ms).
+ * @eq_ofld_params: (Offload) Egress queue parameters.
+ * @cbfn: The call-back function
+ *
+ *
+ */
+void
+csio_mb_eq_ofld_alloc_write(struct csio_hw *hw, struct csio_mb *mbp,
+			    void *priv, uint32_t mb_tmo,
+			    struct csio_eq_params *eq_ofld_params,
+			    void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	csio_mb_eq_ofld_alloc(hw, mbp, priv, mb_tmo, eq_ofld_params, cbfn);
+	csio_mb_eq_ofld_write(hw, mbp, priv, mb_tmo, true,
+			      eq_ofld_params, cbfn);
+} /* csio_mb_eq_ofld_alloc_write */
+
+/*
+ * csio_mb_eq_ofld_alloc_write_rsp - Process the allocation
+ *				& write egress DMA queue mailbox's response.
+ *
+ * @hw: The HW structure.
+ * @mbp: Mailbox structure to initialize.
+ * @retval: Firmware return value.
+ * @eq_ofld_params: (Offload) Egress queue parameters.
+ *
+ */
+void
+csio_mb_eq_ofld_alloc_write_rsp(struct csio_hw *hw,
+				struct csio_mb *mbp, enum fw_retval *ret_val,
+				struct csio_eq_params *eq_ofld_params)
+{
+	struct fw_eq_ofld_cmd *rsp = (struct fw_eq_ofld_cmd *)(mbp->mb);
+
+	*ret_val = FW_CMD_RETVAL_G(ntohl(rsp->alloc_to_len16));
+
+	if (*ret_val == FW_SUCCESS) {
+		eq_ofld_params->eqid = FW_EQ_OFLD_CMD_EQID_G(
+						ntohl(rsp->eqid_pkd));
+		eq_ofld_params->physeqid = FW_EQ_OFLD_CMD_PHYSEQID_G(
+						ntohl(rsp->physeqid_pkd));
+	} else
+		eq_ofld_params->eqid = 0;
+
+} /* csio_mb_eq_ofld_alloc_write_rsp */
+
+/*
+ * csio_mb_eq_ofld_free - Initializes the mailbox for freeing a
+ *				specified Engress DMA Queue.
+ *
+ * @hw: The HW structure
+ * @mbp: Mailbox structure to initialize
+ * @priv: Private data area.
+ * @mb_tmo: Mailbox time-out period (in ms).
+ * @eq_ofld_params: (Offload) Egress queue parameters, that is to be freed.
+ * @cbfn: The call-back function
+ *
+ *
+ */
+void
+csio_mb_eq_ofld_free(struct csio_hw *hw, struct csio_mb *mbp, void *priv,
+		     uint32_t mb_tmo, struct csio_eq_params *eq_ofld_params,
+		     void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_eq_ofld_cmd *cmdp = (struct fw_eq_ofld_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, mb_tmo, priv, cbfn, 1);
+
+	cmdp->op_to_vfn = htonl(FW_CMD_OP_V(FW_EQ_OFLD_CMD)	|
+				FW_CMD_REQUEST_F | FW_CMD_EXEC_F	|
+				FW_EQ_OFLD_CMD_PFN_V(eq_ofld_params->pfn) |
+				FW_EQ_OFLD_CMD_VFN_V(eq_ofld_params->vfn));
+	cmdp->alloc_to_len16 = htonl(FW_EQ_OFLD_CMD_FREE_F |
+				FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+	cmdp->eqid_pkd = htonl(FW_EQ_OFLD_CMD_EQID_V(eq_ofld_params->eqid));
+
+} /* csio_mb_eq_ofld_free */
+
+/*
+ * csio_write_fcoe_link_cond_init_mb - Initialize Mailbox to write FCoE link
+ *				 condition.
+ *
+ * @ln: The Lnode structure
+ * @mbp: Mailbox structure to initialize
+ * @mb_tmo: Mailbox time-out period (in ms).
+ * @cbfn: The call back function.
+ *
+ *
+ */
+void
+csio_write_fcoe_link_cond_init_mb(struct csio_lnode *ln, struct csio_mb *mbp,
+			uint32_t mb_tmo, uint8_t port_id, uint32_t sub_opcode,
+			uint8_t cos, bool link_status, uint32_t fcfi,
+			void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_fcoe_link_cmd *cmdp =
+				(struct fw_fcoe_link_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, mb_tmo, ln, cbfn, 1);
+
+	cmdp->op_to_portid = htonl((
+			FW_CMD_OP_V(FW_FCOE_LINK_CMD)		|
+			FW_CMD_REQUEST_F				|
+			FW_CMD_WRITE_F				|
+			FW_FCOE_LINK_CMD_PORTID(port_id)));
+	cmdp->sub_opcode_fcfi = htonl(
+			FW_FCOE_LINK_CMD_SUB_OPCODE(sub_opcode)	|
+			FW_FCOE_LINK_CMD_FCFI(fcfi));
+	cmdp->lstatus = link_status;
+	cmdp->retval_len16 = htonl(FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+
+} /* csio_write_fcoe_link_cond_init_mb */
+
+/*
+ * csio_fcoe_read_res_info_init_mb - Initializes the mailbox for reading FCoE
+ *				resource information(FW_GET_RES_INFO_CMD).
+ *
+ * @hw: The HW structure
+ * @mbp: Mailbox structure to initialize
+ * @mb_tmo: Mailbox time-out period (in ms).
+ * @cbfn: The call-back function
+ *
+ *
+ */
+void
+csio_fcoe_read_res_info_init_mb(struct csio_hw *hw, struct csio_mb *mbp,
+			uint32_t mb_tmo,
+			void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_fcoe_res_info_cmd *cmdp =
+			(struct fw_fcoe_res_info_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, mb_tmo, hw, cbfn, 1);
+
+	cmdp->op_to_read = htonl((FW_CMD_OP_V(FW_FCOE_RES_INFO_CMD)	|
+				  FW_CMD_REQUEST_F			|
+				  FW_CMD_READ_F));
+
+	cmdp->retval_len16 = htonl(FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+
+} /* csio_fcoe_read_res_info_init_mb */
+
+/*
+ * csio_fcoe_vnp_alloc_init_mb - Initializes the mailbox for allocating VNP
+ *				in the firmware (FW_FCOE_VNP_CMD).
+ *
+ * @ln: The Lnode structure.
+ * @mbp: Mailbox structure to initialize.
+ * @mb_tmo: Mailbox time-out period (in ms).
+ * @fcfi: FCF Index.
+ * @vnpi: vnpi
+ * @iqid: iqid
+ * @vnport_wwnn: vnport WWNN
+ * @vnport_wwpn: vnport WWPN
+ * @cbfn: The call-back function.
+ *
+ *
+ */
+void
+csio_fcoe_vnp_alloc_init_mb(struct csio_lnode *ln, struct csio_mb *mbp,
+		uint32_t mb_tmo, uint32_t fcfi, uint32_t vnpi, uint16_t iqid,
+		uint8_t vnport_wwnn[8],	uint8_t vnport_wwpn[8],
+		void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_fcoe_vnp_cmd *cmdp =
+			(struct fw_fcoe_vnp_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, mb_tmo, ln, cbfn, 1);
+
+	cmdp->op_to_fcfi = htonl((FW_CMD_OP_V(FW_FCOE_VNP_CMD)		|
+				  FW_CMD_REQUEST_F			|
+				  FW_CMD_EXEC_F				|
+				  FW_FCOE_VNP_CMD_FCFI(fcfi)));
+
+	cmdp->alloc_to_len16 = htonl(FW_FCOE_VNP_CMD_ALLOC		|
+				     FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+
+	cmdp->gen_wwn_to_vnpi = htonl(FW_FCOE_VNP_CMD_VNPI(vnpi));
+
+	cmdp->iqid = htons(iqid);
+
+	if (!wwn_to_u64(vnport_wwnn) && !wwn_to_u64(vnport_wwpn))
+		cmdp->gen_wwn_to_vnpi |= htonl(FW_FCOE_VNP_CMD_GEN_WWN);
+
+	if (vnport_wwnn)
+		memcpy(cmdp->vnport_wwnn, vnport_wwnn, 8);
+	if (vnport_wwpn)
+		memcpy(cmdp->vnport_wwpn, vnport_wwpn, 8);
+
+} /* csio_fcoe_vnp_alloc_init_mb */
+
+/*
+ * csio_fcoe_vnp_read_init_mb - Prepares VNP read cmd.
+ * @ln: The Lnode structure.
+ * @mbp: Mailbox structure to initialize.
+ * @mb_tmo: Mailbox time-out period (in ms).
+ * @fcfi: FCF Index.
+ * @vnpi: vnpi
+ * @cbfn: The call-back handler.
+ */
+void
+csio_fcoe_vnp_read_init_mb(struct csio_lnode *ln, struct csio_mb *mbp,
+		uint32_t mb_tmo, uint32_t fcfi, uint32_t vnpi,
+		void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_fcoe_vnp_cmd *cmdp =
+			(struct fw_fcoe_vnp_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, mb_tmo, ln, cbfn, 1);
+	cmdp->op_to_fcfi = htonl(FW_CMD_OP_V(FW_FCOE_VNP_CMD)	|
+				 FW_CMD_REQUEST_F			|
+				 FW_CMD_READ_F			|
+				 FW_FCOE_VNP_CMD_FCFI(fcfi));
+	cmdp->alloc_to_len16 = htonl(FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+	cmdp->gen_wwn_to_vnpi = htonl(FW_FCOE_VNP_CMD_VNPI(vnpi));
+}
+
+/*
+ * csio_fcoe_vnp_free_init_mb - Initializes the mailbox for freeing an
+ *			alloacted VNP in the firmware (FW_FCOE_VNP_CMD).
+ *
+ * @ln: The Lnode structure.
+ * @mbp: Mailbox structure to initialize.
+ * @mb_tmo: Mailbox time-out period (in ms).
+ * @fcfi: FCF flow id
+ * @vnpi: VNP flow id
+ * @cbfn: The call-back function.
+ * Return: None
+ */
+void
+csio_fcoe_vnp_free_init_mb(struct csio_lnode *ln, struct csio_mb *mbp,
+		uint32_t mb_tmo, uint32_t fcfi, uint32_t vnpi,
+		void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_fcoe_vnp_cmd *cmdp =
+			(struct fw_fcoe_vnp_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, mb_tmo, ln, cbfn, 1);
+
+	cmdp->op_to_fcfi = htonl(FW_CMD_OP_V(FW_FCOE_VNP_CMD)	|
+				 FW_CMD_REQUEST_F			|
+				 FW_CMD_EXEC_F			|
+				 FW_FCOE_VNP_CMD_FCFI(fcfi));
+	cmdp->alloc_to_len16 = htonl(FW_FCOE_VNP_CMD_FREE	|
+				     FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+	cmdp->gen_wwn_to_vnpi = htonl(FW_FCOE_VNP_CMD_VNPI(vnpi));
+}
+
+/*
+ * csio_fcoe_read_fcf_init_mb - Initializes the mailbox to read the
+ *				FCF records.
+ *
+ * @ln: The Lnode structure
+ * @mbp: Mailbox structure to initialize
+ * @mb_tmo: Mailbox time-out period (in ms).
+ * @fcf_params: FC-Forwarder parameters.
+ * @cbfn: The call-back function
+ *
+ *
+ */
+void
+csio_fcoe_read_fcf_init_mb(struct csio_lnode *ln, struct csio_mb *mbp,
+		uint32_t mb_tmo, uint32_t portid, uint32_t fcfi,
+		void (*cbfn) (struct csio_hw *, struct csio_mb *))
+{
+	struct fw_fcoe_fcf_cmd *cmdp =
+			(struct fw_fcoe_fcf_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, mb_tmo, ln, cbfn, 1);
+
+	cmdp->op_to_fcfi = htonl(FW_CMD_OP_V(FW_FCOE_FCF_CMD)	|
+				 FW_CMD_REQUEST_F			|
+				 FW_CMD_READ_F			|
+				 FW_FCOE_FCF_CMD_FCFI(fcfi));
+	cmdp->retval_len16 = htonl(FW_CMD_LEN16_V(sizeof(*cmdp) / 16));
+
+} /* csio_fcoe_read_fcf_init_mb */
+
+void
+csio_fcoe_read_portparams_init_mb(struct csio_hw *hw, struct csio_mb *mbp,
+				uint32_t mb_tmo,
+				struct fw_fcoe_port_cmd_params *portparams,
+				void (*cbfn)(struct csio_hw *,
+					     struct csio_mb *))
+{
+	struct fw_fcoe_stats_cmd *cmdp = (struct fw_fcoe_stats_cmd *)(mbp->mb);
+
+	CSIO_INIT_MBP(mbp, cmdp, mb_tmo, hw, cbfn, 1);
+	mbp->mb_size = 64;
+
+	cmdp->op_to_flowid = htonl(FW_CMD_OP_V(FW_FCOE_STATS_CMD)         |
+				   FW_CMD_REQUEST_F | FW_CMD_READ_F);
+	cmdp->free_to_len16 = htonl(FW_CMD_LEN16_V(CSIO_MAX_MB_SIZE/16));
+
+	cmdp->u.ctl.nstats_port = FW_FCOE_STATS_CMD_NSTATS(portparams->nstats) |
+				  FW_FCOE_STATS_CMD_PORT(portparams->portid);
+
+	cmdp->u.ctl.port_valid_ix = FW_FCOE_STATS_CMD_IX(portparams->idx)    |
+				    FW_FCOE_STATS_CMD_PORT_VALID;
+
+} /* csio_fcoe_read_portparams_init_mb */
+
+void
+csio_mb_process_portparams_rsp(struct csio_hw *hw,
+				struct csio_mb *mbp,
+				enum fw_retval *retval,
+				struct fw_fcoe_port_cmd_params *portparams,
+				struct fw_fcoe_port_stats *portstats)
+{
+	struct fw_fcoe_stats_cmd *rsp = (struct fw_fcoe_stats_cmd *)(mbp->mb);
+	struct fw_fcoe_port_stats stats;
+	uint8_t *src;
+	uint8_t *dst;
+
+	*retval = FW_CMD_RETVAL_G(ntohl(rsp->free_to_len16));
+
+	memset(&stats, 0, sizeof(struct fw_fcoe_port_stats));
+
+	if (*retval == FW_SUCCESS) {
+		dst = (uint8_t *)(&stats) + ((portparams->idx - 1) * 8);
+		src = (uint8_t *)rsp + (CSIO_STATS_OFFSET * 8);
+		memcpy(dst, src, (portparams->nstats * 8));
+		if (portparams->idx == 1) {
+			/* Get the first 6 flits from the Mailbox */
+			portstats->tx_bcast_bytes = stats.tx_bcast_bytes;
+			portstats->tx_bcast_frames = stats.tx_bcast_frames;
+			portstats->tx_mcast_bytes = stats.tx_mcast_bytes;
+			portstats->tx_mcast_frames = stats.tx_mcast_frames;
+			portstats->tx_ucast_bytes = stats.tx_ucast_bytes;
+			portstats->tx_ucast_frames = stats.tx_ucast_frames;
+		}
+		if (portparams->idx == 7) {
+			/* Get the second 6 flits from the Mailbox */
+			portstats->tx_drop_frames = stats.tx_drop_frames;
+			portstats->tx_offload_bytes = stats.tx_offload_bytes;
+			portstats->tx_offload_frames = stats.tx_offload_frames;
+#if 0
+			portstats->rx_pf_bytes = stats.rx_pf_bytes;
+			portstats->rx_pf_frames	= stats.rx_pf_frames;
+#endif
+			portstats->rx_bcast_bytes = stats.rx_bcast_bytes;
+			portstats->rx_bcast_frames = stats.rx_bcast_frames;
+			portstats->rx_mcast_bytes = stats.rx_mcast_bytes;
+		}
+		if (portparams->idx == 13) {
+			/* Get the last 4 flits from the Mailbox */
+			portstats->rx_mcast_frames = stats.rx_mcast_frames;
+			portstats->rx_ucast_bytes = stats.rx_ucast_bytes;
+			portstats->rx_ucast_frames = stats.rx_ucast_frames;
+			portstats->rx_err_frames = stats.rx_err_frames;
+		}
+	}
+}
+
+/* Entry points/APIs for MB module					     */
+/*
+ * csio_mb_intr_enable - Enable Interrupts from mailboxes.
+ * @hw: The HW structure
+ *
+ * Enables CIM interrupt bit in appropriate INT_ENABLE registers.
+ */
+void
+csio_mb_intr_enable(struct csio_hw *hw)
+{
+	csio_wr_reg32(hw, MBMSGRDYINTEN_F, MYPF_REG(CIM_PF_HOST_INT_ENABLE_A));
+	csio_rd_reg32(hw, MYPF_REG(CIM_PF_HOST_INT_ENABLE_A));
+}
+
+/*
+ * csio_mb_intr_disable - Disable Interrupts from mailboxes.
+ * @hw: The HW structure
+ *
+ * Disable bit in HostInterruptEnable CIM register.
+ */
+void
+csio_mb_intr_disable(struct csio_hw *hw)
+{
+	csio_wr_reg32(hw, MBMSGRDYINTEN_V(0),
+		      MYPF_REG(CIM_PF_HOST_INT_ENABLE_A));
+	csio_rd_reg32(hw, MYPF_REG(CIM_PF_HOST_INT_ENABLE_A));
+}
+
+static void
+csio_mb_dump_fw_dbg(struct csio_hw *hw, __be64 *cmd)
+{
+	struct fw_debug_cmd *dbg = (struct fw_debug_cmd *)cmd;
+
+	if ((FW_DEBUG_CMD_TYPE_G(ntohl(dbg->op_type))) == 1) {
+		csio_info(hw, "FW print message:\n");
+		csio_info(hw, "\tdebug->dprtstridx = %d\n",
+			    ntohs(dbg->u.prt.dprtstridx));
+		csio_info(hw, "\tdebug->dprtstrparam0 = 0x%x\n",
+			    ntohl(dbg->u.prt.dprtstrparam0));
+		csio_info(hw, "\tdebug->dprtstrparam1 = 0x%x\n",
+			    ntohl(dbg->u.prt.dprtstrparam1));
+		csio_info(hw, "\tdebug->dprtstrparam2 = 0x%x\n",
+			    ntohl(dbg->u.prt.dprtstrparam2));
+		csio_info(hw, "\tdebug->dprtstrparam3 = 0x%x\n",
+			    ntohl(dbg->u.prt.dprtstrparam3));
+	} else {
+		/* This is a FW assertion */
+		csio_fatal(hw, "FW assertion at %.16s:%u, val0 %#x, val1 %#x\n",
+			    dbg->u.assert.filename_0_7,
+			    ntohl(dbg->u.assert.line),
+			    ntohl(dbg->u.assert.x),
+			    ntohl(dbg->u.assert.y));
+	}
+}
+
+static void
+csio_mb_debug_cmd_handler(struct csio_hw *hw)
+{
+	int i;
+	__be64 cmd[CSIO_MB_MAX_REGS];
+	uint32_t ctl_reg = PF_REG(hw->pfn, CIM_PF_MAILBOX_CTRL_A);
+	uint32_t data_reg = PF_REG(hw->pfn, CIM_PF_MAILBOX_DATA_A);
+	int size = sizeof(struct fw_debug_cmd);
+
+	/* Copy mailbox data */
+	for (i = 0; i < size; i += 8)
+		cmd[i / 8] = cpu_to_be64(csio_rd_reg64(hw, data_reg + i));
+
+	csio_mb_dump_fw_dbg(hw, cmd);
+
+	/* Notify FW of mailbox by setting owner as UP */
+	csio_wr_reg32(hw, MBMSGVALID_F | MBINTREQ_F |
+		      MBOWNER_V(CSIO_MBOWNER_FW), ctl_reg);
+
+	csio_rd_reg32(hw, ctl_reg);
+	wmb();
+}
+
+/*
+ * csio_mb_issue - generic routine for issuing Mailbox commands.
+ * @hw: The HW structure
+ * @mbp: Mailbox command to issue
+ *
+ *  Caller should hold hw lock across this call.
+ */
+int
+csio_mb_issue(struct csio_hw *hw, struct csio_mb *mbp)
+{
+	uint32_t owner, ctl;
+	int i;
+	uint32_t ii;
+	__be64 *cmd = mbp->mb;
+	__be64 hdr;
+	struct csio_mbm	*mbm = &hw->mbm;
+	uint32_t ctl_reg = PF_REG(hw->pfn, CIM_PF_MAILBOX_CTRL_A);
+	uint32_t data_reg = PF_REG(hw->pfn, CIM_PF_MAILBOX_DATA_A);
+	int size = mbp->mb_size;
+	int rv = -EINVAL;
+	struct fw_cmd_hdr *fw_hdr;
+
+	/* Determine mode */
+	if (mbp->mb_cbfn == NULL) {
+		/* Need to issue/get results in the same context */
+		if (mbp->tmo < CSIO_MB_POLL_FREQ) {
+			csio_err(hw, "Invalid tmo: 0x%x\n", mbp->tmo);
+			goto error_out;
+		}
+	} else if (!csio_is_host_intr_enabled(hw) ||
+		   !csio_is_hw_intr_enabled(hw)) {
+		csio_err(hw, "Cannot issue mailbox in interrupt mode 0x%x\n",
+			 *((uint8_t *)mbp->mb));
+		goto error_out;
+	}
+
+	if (mbm->mcurrent != NULL) {
+		/* Queue mbox cmd, if another mbox cmd is active */
+		if (mbp->mb_cbfn == NULL) {
+			rv = -EBUSY;
+			csio_dbg(hw, "Couldn't own Mailbox %x op:0x%x\n",
+				    hw->pfn, *((uint8_t *)mbp->mb));
+
+			goto error_out;
+		} else {
+			list_add_tail(&mbp->list, &mbm->req_q);
+			CSIO_INC_STATS(mbm, n_activeq);
+
+			return 0;
+		}
+	}
+
+	/* Now get ownership of mailbox */
+	owner = MBOWNER_G(csio_rd_reg32(hw, ctl_reg));
+
+	if (!csio_mb_is_host_owner(owner)) {
+
+		for (i = 0; (owner == CSIO_MBOWNER_NONE) && (i < 3); i++)
+			owner = MBOWNER_G(csio_rd_reg32(hw, ctl_reg));
+		/*
+		 * Mailbox unavailable. In immediate mode, fail the command.
+		 * In other modes, enqueue the request.
+		 */
+		if (!csio_mb_is_host_owner(owner)) {
+			if (mbp->mb_cbfn == NULL) {
+				rv = owner ? -EBUSY : -ETIMEDOUT;
+
+				csio_dbg(hw,
+					 "Couldn't own Mailbox %x op:0x%x "
+					 "owner:%x\n",
+					 hw->pfn, *((uint8_t *)mbp->mb), owner);
+				goto error_out;
+			} else {
+				if (mbm->mcurrent == NULL) {
+					csio_err(hw,
+						 "Couldn't own Mailbox %x "
+						 "op:0x%x owner:%x\n",
+						 hw->pfn, *((uint8_t *)mbp->mb),
+						 owner);
+					csio_err(hw,
+						 "No outstanding driver"
+						 " mailbox as well\n");
+					goto error_out;
+				}
+			}
+		}
+	}
+
+	/* Mailbox is available, copy mailbox data into it */
+	for (i = 0; i < size; i += 8) {
+		csio_wr_reg64(hw, be64_to_cpu(*cmd), data_reg + i);
+		cmd++;
+	}
+
+	CSIO_DUMP_MB(hw, hw->pfn, data_reg);
+
+	/* Start completion timers in non-immediate modes and notify FW */
+	if (mbp->mb_cbfn != NULL) {
+		mbm->mcurrent = mbp;
+		mod_timer(&mbm->timer, jiffies + msecs_to_jiffies(mbp->tmo));
+		csio_wr_reg32(hw, MBMSGVALID_F | MBINTREQ_F |
+			      MBOWNER_V(CSIO_MBOWNER_FW), ctl_reg);
+	} else
+		csio_wr_reg32(hw, MBMSGVALID_F | MBOWNER_V(CSIO_MBOWNER_FW),
+			      ctl_reg);
+
+	/* Flush posted writes */
+	csio_rd_reg32(hw, ctl_reg);
+	wmb();
+
+	CSIO_INC_STATS(mbm, n_req);
+
+	if (mbp->mb_cbfn)
+		return 0;
+
+	/* Poll for completion in immediate mode */
+	cmd = mbp->mb;
+
+	for (ii = 0; ii < mbp->tmo; ii += CSIO_MB_POLL_FREQ) {
+		mdelay(CSIO_MB_POLL_FREQ);
+
+		/* Check for response */
+		ctl = csio_rd_reg32(hw, ctl_reg);
+		if (csio_mb_is_host_owner(MBOWNER_G(ctl))) {
+
+			if (!(ctl & MBMSGVALID_F)) {
+				csio_wr_reg32(hw, 0, ctl_reg);
+				continue;
+			}
+
+			CSIO_DUMP_MB(hw, hw->pfn, data_reg);
+
+			hdr = cpu_to_be64(csio_rd_reg64(hw, data_reg));
+			fw_hdr = (struct fw_cmd_hdr *)&hdr;
+
+			switch (FW_CMD_OP_G(ntohl(fw_hdr->hi))) {
+			case FW_DEBUG_CMD:
+				csio_mb_debug_cmd_handler(hw);
+				continue;
+			}
+
+			/* Copy response */
+			for (i = 0; i < size; i += 8)
+				*cmd++ = cpu_to_be64(csio_rd_reg64
+							  (hw, data_reg + i));
+			csio_wr_reg32(hw, 0, ctl_reg);
+
+			if (csio_mb_fw_retval(mbp) != FW_SUCCESS)
+				CSIO_INC_STATS(mbm, n_err);
+
+			CSIO_INC_STATS(mbm, n_rsp);
+			return 0;
+		}
+	}
+
+	CSIO_INC_STATS(mbm, n_tmo);
+
+	csio_err(hw, "Mailbox %x op:0x%x timed out!\n",
+		 hw->pfn, *((uint8_t *)cmd));
+
+	return -ETIMEDOUT;
+
+error_out:
+	CSIO_INC_STATS(mbm, n_err);
+	return rv;
+}
+
+/*
+ * csio_mb_completions - Completion handler for Mailbox commands
+ * @hw: The HW structure
+ * @cbfn_q: Completion queue.
+ *
+ */
+void
+csio_mb_completions(struct csio_hw *hw, struct list_head *cbfn_q)
+{
+	struct csio_mb *mbp;
+	struct csio_mbm *mbm = &hw->mbm;
+	enum fw_retval rv;
+
+	while (!list_empty(cbfn_q)) {
+		mbp = list_first_entry(cbfn_q, struct csio_mb, list);
+		list_del_init(&mbp->list);
+
+		rv = csio_mb_fw_retval(mbp);
+		if ((rv != FW_SUCCESS) && (rv != FW_HOSTERROR))
+			CSIO_INC_STATS(mbm, n_err);
+		else if (rv != FW_HOSTERROR)
+			CSIO_INC_STATS(mbm, n_rsp);
+
+		if (mbp->mb_cbfn)
+			mbp->mb_cbfn(hw, mbp);
+	}
+}
+
+static void
+csio_mb_portmod_changed(struct csio_hw *hw, uint8_t port_id)
+{
+	static char *mod_str[] = {
+		NULL, "LR", "SR", "ER", "TWINAX", "active TWINAX", "LRM"
+	};
+
+	struct csio_pport *port = &hw->pport[port_id];
+
+	if (port->mod_type == FW_PORT_MOD_TYPE_NONE)
+		csio_info(hw, "Port:%d - port module unplugged\n", port_id);
+	else if (port->mod_type < ARRAY_SIZE(mod_str))
+		csio_info(hw, "Port:%d - %s port module inserted\n", port_id,
+			  mod_str[port->mod_type]);
+	else if (port->mod_type == FW_PORT_MOD_TYPE_NOTSUPPORTED)
+		csio_info(hw,
+			  "Port:%d - unsupported optical port module "
+			  "inserted\n", port_id);
+	else if (port->mod_type == FW_PORT_MOD_TYPE_UNKNOWN)
+		csio_info(hw,
+			  "Port:%d - unknown port module inserted, forcing "
+			  "TWINAX\n", port_id);
+	else if (port->mod_type == FW_PORT_MOD_TYPE_ERROR)
+		csio_info(hw, "Port:%d - transceiver module error\n", port_id);
+	else
+		csio_info(hw, "Port:%d - unknown module type %d inserted\n",
+			  port_id, port->mod_type);
+}
+
+int
+csio_mb_fwevt_handler(struct csio_hw *hw, __be64 *cmd)
+{
+	uint8_t opcode = *(uint8_t *)cmd;
+	struct fw_port_cmd *pcmd;
+	uint8_t port_id;
+	uint32_t link_status;
+	uint16_t action;
+	uint8_t mod_type;
+	fw_port_cap32_t linkattr;
+
+	if (opcode == FW_PORT_CMD) {
+		pcmd = (struct fw_port_cmd *)cmd;
+		port_id = FW_PORT_CMD_PORTID_G(
+				ntohl(pcmd->op_to_portid));
+		action = FW_PORT_CMD_ACTION_G(
+				ntohl(pcmd->action_to_len16));
+		if (action != FW_PORT_ACTION_GET_PORT_INFO &&
+		    action != FW_PORT_ACTION_GET_PORT_INFO32) {
+			csio_err(hw, "Unhandled FW_PORT_CMD action: %u\n",
+				action);
+			return -EINVAL;
+		}
+
+		if (action == FW_PORT_ACTION_GET_PORT_INFO) {
+			link_status = ntohl(pcmd->u.info.lstatus_to_modtype);
+			mod_type = FW_PORT_CMD_MODTYPE_G(link_status);
+			linkattr = lstatus_to_fwcap(link_status);
+
+			hw->pport[port_id].link_status =
+				FW_PORT_CMD_LSTATUS_G(link_status);
+		} else {
+			link_status =
+				ntohl(pcmd->u.info32.lstatus32_to_cbllen32);
+			mod_type = FW_PORT_CMD_MODTYPE32_G(link_status);
+			linkattr = ntohl(pcmd->u.info32.linkattr32);
+
+			hw->pport[port_id].link_status =
+				FW_PORT_CMD_LSTATUS32_G(link_status);
+		}
+
+		hw->pport[port_id].link_speed = fwcap_to_fwspeed(linkattr);
+
+		csio_info(hw, "Port:%x - LINK %s\n", port_id,
+			hw->pport[port_id].link_status ? "UP" : "DOWN");
+
+		if (mod_type != hw->pport[port_id].mod_type) {
+			hw->pport[port_id].mod_type = mod_type;
+			csio_mb_portmod_changed(hw, port_id);
+		}
+	} else if (opcode == FW_DEBUG_CMD) {
+		csio_mb_dump_fw_dbg(hw, cmd);
+	} else {
+		csio_dbg(hw, "Gen MB can't handle op:0x%x on evtq.\n", opcode);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/*
+ * csio_mb_isr_handler - Handle mailboxes related interrupts.
+ * @hw: The HW structure
+ *
+ * Called from the ISR to handle Mailbox related interrupts.
+ * HW Lock should be held across this call.
+ */
+int
+csio_mb_isr_handler(struct csio_hw *hw)
+{
+	struct csio_mbm		*mbm = &hw->mbm;
+	struct csio_mb		*mbp =  mbm->mcurrent;
+	__be64			*cmd;
+	uint32_t		ctl, cim_cause, pl_cause;
+	int			i;
+	uint32_t	ctl_reg = PF_REG(hw->pfn, CIM_PF_MAILBOX_CTRL_A);
+	uint32_t	data_reg = PF_REG(hw->pfn, CIM_PF_MAILBOX_DATA_A);
+	int			size;
+	__be64			hdr;
+	struct fw_cmd_hdr	*fw_hdr;
+
+	pl_cause = csio_rd_reg32(hw, MYPF_REG(PL_PF_INT_CAUSE_A));
+	cim_cause = csio_rd_reg32(hw, MYPF_REG(CIM_PF_HOST_INT_CAUSE_A));
+
+	if (!(pl_cause & PFCIM_F) || !(cim_cause & MBMSGRDYINT_F)) {
+		CSIO_INC_STATS(hw, n_mbint_unexp);
+		return -EINVAL;
+	}
+
+	/*
+	 * The cause registers below HAVE to be cleared in the SAME
+	 * order as below: The low level cause register followed by
+	 * the upper level cause register. In other words, CIM-cause
+	 * first followed by PL-Cause next.
+	 */
+	csio_wr_reg32(hw, MBMSGRDYINT_F, MYPF_REG(CIM_PF_HOST_INT_CAUSE_A));
+	csio_wr_reg32(hw, PFCIM_F, MYPF_REG(PL_PF_INT_CAUSE_A));
+
+	ctl = csio_rd_reg32(hw, ctl_reg);
+
+	if (csio_mb_is_host_owner(MBOWNER_G(ctl))) {
+
+		CSIO_DUMP_MB(hw, hw->pfn, data_reg);
+
+		if (!(ctl & MBMSGVALID_F)) {
+			csio_warn(hw,
+				  "Stray mailbox interrupt recvd,"
+				  " mailbox data not valid\n");
+			csio_wr_reg32(hw, 0, ctl_reg);
+			/* Flush */
+			csio_rd_reg32(hw, ctl_reg);
+			return -EINVAL;
+		}
+
+		hdr = cpu_to_be64(csio_rd_reg64(hw, data_reg));
+		fw_hdr = (struct fw_cmd_hdr *)&hdr;
+
+		switch (FW_CMD_OP_G(ntohl(fw_hdr->hi))) {
+		case FW_DEBUG_CMD:
+			csio_mb_debug_cmd_handler(hw);
+			return -EINVAL;
+#if 0
+		case FW_ERROR_CMD:
+		case FW_INITIALIZE_CMD: /* When we are not master */
+#endif
+		}
+
+		CSIO_ASSERT(mbp != NULL);
+
+		cmd = mbp->mb;
+		size = mbp->mb_size;
+		/* Get response */
+		for (i = 0; i < size; i += 8)
+			*cmd++ = cpu_to_be64(csio_rd_reg64
+						  (hw, data_reg + i));
+
+		csio_wr_reg32(hw, 0, ctl_reg);
+		/* Flush */
+		csio_rd_reg32(hw, ctl_reg);
+
+		mbm->mcurrent = NULL;
+
+		/* Add completion to tail of cbfn queue */
+		list_add_tail(&mbp->list, &mbm->cbfn_q);
+		CSIO_INC_STATS(mbm, n_cbfnq);
+
+		/*
+		 * Enqueue event to EventQ. Events processing happens
+		 * in Event worker thread context
+		 */
+		if (csio_enqueue_evt(hw, CSIO_EVT_MBX, mbp, sizeof(mbp)))
+			CSIO_INC_STATS(hw, n_evt_drop);
+
+		return 0;
+
+	} else {
+		/*
+		 * We can get here if mailbox MSIX vector is shared,
+		 * or in INTx case. Or a stray interrupt.
+		 */
+		csio_dbg(hw, "Host not owner, no mailbox interrupt\n");
+		CSIO_INC_STATS(hw, n_int_stray);
+		return -EINVAL;
+	}
+}
+
+/*
+ * csio_mb_tmo_handler - Timeout handler
+ * @hw: The HW structure
+ *
+ */
+struct csio_mb *
+csio_mb_tmo_handler(struct csio_hw *hw)
+{
+	struct csio_mbm *mbm = &hw->mbm;
+	struct csio_mb *mbp =  mbm->mcurrent;
+	struct fw_cmd_hdr *fw_hdr;
+
+	/*
+	 * Could be a race b/w the completion handler and the timer
+	 * and the completion handler won that race.
+	 */
+	if (mbp == NULL) {
+		CSIO_DB_ASSERT(0);
+		return NULL;
+	}
+
+	fw_hdr = (struct fw_cmd_hdr *)(mbp->mb);
+
+	csio_dbg(hw, "Mailbox num:%x op:0x%x timed out\n", hw->pfn,
+		    FW_CMD_OP_G(ntohl(fw_hdr->hi)));
+
+	mbm->mcurrent = NULL;
+	CSIO_INC_STATS(mbm, n_tmo);
+	fw_hdr->lo = htonl(FW_CMD_RETVAL_V(FW_ETIMEDOUT));
+
+	return mbp;
+}
+
+/*
+ * csio_mb_cancel_all - Cancel all waiting commands.
+ * @hw: The HW structure
+ * @cbfn_q: The callback queue.
+ *
+ * Caller should hold hw lock across this call.
+ */
+void
+csio_mb_cancel_all(struct csio_hw *hw, struct list_head *cbfn_q)
+{
+	struct csio_mb *mbp;
+	struct csio_mbm *mbm = &hw->mbm;
+	struct fw_cmd_hdr *hdr;
+	struct list_head *tmp;
+
+	if (mbm->mcurrent) {
+		mbp = mbm->mcurrent;
+
+		/* Stop mailbox completion timer */
+		del_timer_sync(&mbm->timer);
+
+		/* Add completion to tail of cbfn queue */
+		list_add_tail(&mbp->list, cbfn_q);
+		mbm->mcurrent = NULL;
+	}
+
+	if (!list_empty(&mbm->req_q)) {
+		list_splice_tail_init(&mbm->req_q, cbfn_q);
+		mbm->stats.n_activeq = 0;
+	}
+
+	if (!list_empty(&mbm->cbfn_q)) {
+		list_splice_tail_init(&mbm->cbfn_q, cbfn_q);
+		mbm->stats.n_cbfnq = 0;
+	}
+
+	if (list_empty(cbfn_q))
+		return;
+
+	list_for_each(tmp, cbfn_q) {
+		mbp = (struct csio_mb *)tmp;
+		hdr = (struct fw_cmd_hdr *)(mbp->mb);
+
+		csio_dbg(hw, "Cancelling pending mailbox num %x op:%x\n",
+			    hw->pfn, FW_CMD_OP_G(ntohl(hdr->hi)));
+
+		CSIO_INC_STATS(mbm, n_cancel);
+		hdr->lo = htonl(FW_CMD_RETVAL_V(FW_HOSTERROR));
+	}
+}
+
+/*
+ * csio_mbm_init - Initialize Mailbox module
+ * @mbm: Mailbox module
+ * @hw: The HW structure
+ * @timer: Timing function for interrupting mailboxes
+ *
+ * Initialize timer and the request/response queues.
+ */
+int
+csio_mbm_init(struct csio_mbm *mbm, struct csio_hw *hw,
+	      void (*timer_fn)(struct timer_list *))
+{
+	mbm->hw = hw;
+	timer_setup(&mbm->timer, timer_fn, 0);
+
+	INIT_LIST_HEAD(&mbm->req_q);
+	INIT_LIST_HEAD(&mbm->cbfn_q);
+	csio_set_mb_intr_idx(mbm, -1);
+
+	return 0;
+}
+
+/*
+ * csio_mbm_exit - Uninitialize mailbox module
+ * @mbm: Mailbox module
+ *
+ * Stop timer.
+ */
+void
+csio_mbm_exit(struct csio_mbm *mbm)
+{
+	del_timer_sync(&mbm->timer);
+
+	CSIO_DB_ASSERT(mbm->mcurrent == NULL);
+	CSIO_DB_ASSERT(list_empty(&mbm->req_q));
+	CSIO_DB_ASSERT(list_empty(&mbm->cbfn_q));
+}