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, 566 insertions, 0 deletions

diff --git a/drivers/net/ethernet/brocade/bna/bnad_debugfs.c b/drivers/net/ethernet/brocade/bna/bnad_debugfs.c
new file mode 100644
index 000000000..04ad0f2b9
--- /dev/null
+++ b/drivers/net/ethernet/brocade/bna/bnad_debugfs.c
@@ -0,0 +1,566 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Linux network driver for QLogic BR-series Converged Network Adapter.
+ */
+/*
+ * Copyright (c) 2005-2014 Brocade Communications Systems, Inc.
+ * Copyright (c) 2014-2015 QLogic Corporation
+ * All rights reserved
+ * www.qlogic.com
+ */
+
+#include <linux/debugfs.h>
+#include <linux/module.h>
+#include "bnad.h"
+
+/*
+ * BNA debufs interface
+ *
+ * To access the interface, debugfs file system should be mounted
+ * if not already mounted using:
+ *	mount -t debugfs none /sys/kernel/debug
+ *
+ * BNA Hierarchy:
+ *	- bna/pci_dev:<pci_name>
+ * where the pci_name corresponds to the one under /sys/bus/pci/drivers/bna
+ *
+ * Debugging service available per pci_dev:
+ *	fwtrc:  To collect current firmware trace.
+ *	fwsave: To collect last saved fw trace as a result of firmware crash.
+ *	regwr:  To write one word to chip register
+ *	regrd:  To read one or more words from chip register.
+ */
+
+struct bnad_debug_info {
+	char *debug_buffer;
+	void *i_private;
+	int buffer_len;
+};
+
+static int
+bnad_debugfs_open_fwtrc(struct inode *inode, struct file *file)
+{
+	struct bnad *bnad = inode->i_private;
+	struct bnad_debug_info *fw_debug;
+	unsigned long flags;
+	int rc;
+
+	fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
+	if (!fw_debug)
+		return -ENOMEM;
+
+	fw_debug->buffer_len = BNA_DBG_FWTRC_LEN;
+
+	fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL);
+	if (!fw_debug->debug_buffer) {
+		kfree(fw_debug);
+		fw_debug = NULL;
+		return -ENOMEM;
+	}
+
+	spin_lock_irqsave(&bnad->bna_lock, flags);
+	rc = bfa_nw_ioc_debug_fwtrc(&bnad->bna.ioceth.ioc,
+			fw_debug->debug_buffer,
+			&fw_debug->buffer_len);
+	spin_unlock_irqrestore(&bnad->bna_lock, flags);
+	if (rc != BFA_STATUS_OK) {
+		kfree(fw_debug->debug_buffer);
+		fw_debug->debug_buffer = NULL;
+		kfree(fw_debug);
+		fw_debug = NULL;
+		netdev_warn(bnad->netdev, "failed to collect fwtrc\n");
+		return -ENOMEM;
+	}
+
+	file->private_data = fw_debug;
+
+	return 0;
+}
+
+static int
+bnad_debugfs_open_fwsave(struct inode *inode, struct file *file)
+{
+	struct bnad *bnad = inode->i_private;
+	struct bnad_debug_info *fw_debug;
+	unsigned long flags;
+	int rc;
+
+	fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
+	if (!fw_debug)
+		return -ENOMEM;
+
+	fw_debug->buffer_len = BNA_DBG_FWTRC_LEN;
+
+	fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL);
+	if (!fw_debug->debug_buffer) {
+		kfree(fw_debug);
+		fw_debug = NULL;
+		return -ENOMEM;
+	}
+
+	spin_lock_irqsave(&bnad->bna_lock, flags);
+	rc = bfa_nw_ioc_debug_fwsave(&bnad->bna.ioceth.ioc,
+			fw_debug->debug_buffer,
+			&fw_debug->buffer_len);
+	spin_unlock_irqrestore(&bnad->bna_lock, flags);
+	if (rc != BFA_STATUS_OK && rc != BFA_STATUS_ENOFSAVE) {
+		kfree(fw_debug->debug_buffer);
+		fw_debug->debug_buffer = NULL;
+		kfree(fw_debug);
+		fw_debug = NULL;
+		netdev_warn(bnad->netdev, "failed to collect fwsave\n");
+		return -ENOMEM;
+	}
+
+	file->private_data = fw_debug;
+
+	return 0;
+}
+
+static int
+bnad_debugfs_open_reg(struct inode *inode, struct file *file)
+{
+	struct bnad_debug_info *reg_debug;
+
+	reg_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
+	if (!reg_debug)
+		return -ENOMEM;
+
+	reg_debug->i_private = inode->i_private;
+
+	file->private_data = reg_debug;
+
+	return 0;
+}
+
+static int
+bnad_get_debug_drvinfo(struct bnad *bnad, void *buffer, u32 len)
+{
+	struct bnad_drvinfo *drvinfo = (struct bnad_drvinfo *) buffer;
+	struct bnad_iocmd_comp fcomp;
+	unsigned long flags = 0;
+	int ret = BFA_STATUS_FAILED;
+
+	/* Get IOC info */
+	spin_lock_irqsave(&bnad->bna_lock, flags);
+	bfa_nw_ioc_get_attr(&bnad->bna.ioceth.ioc, &drvinfo->ioc_attr);
+	spin_unlock_irqrestore(&bnad->bna_lock, flags);
+
+	/* Retrieve CEE related info */
+	fcomp.bnad = bnad;
+	fcomp.comp_status = 0;
+	init_completion(&fcomp.comp);
+	spin_lock_irqsave(&bnad->bna_lock, flags);
+	ret = bfa_nw_cee_get_attr(&bnad->bna.cee, &drvinfo->cee_attr,
+				bnad_cb_completion, &fcomp);
+	if (ret != BFA_STATUS_OK) {
+		spin_unlock_irqrestore(&bnad->bna_lock, flags);
+		goto out;
+	}
+	spin_unlock_irqrestore(&bnad->bna_lock, flags);
+	wait_for_completion(&fcomp.comp);
+	drvinfo->cee_status = fcomp.comp_status;
+
+	/* Retrieve flash partition info */
+	fcomp.comp_status = 0;
+	reinit_completion(&fcomp.comp);
+	spin_lock_irqsave(&bnad->bna_lock, flags);
+	ret = bfa_nw_flash_get_attr(&bnad->bna.flash, &drvinfo->flash_attr,
+				bnad_cb_completion, &fcomp);
+	if (ret != BFA_STATUS_OK) {
+		spin_unlock_irqrestore(&bnad->bna_lock, flags);
+		goto out;
+	}
+	spin_unlock_irqrestore(&bnad->bna_lock, flags);
+	wait_for_completion(&fcomp.comp);
+	drvinfo->flash_status = fcomp.comp_status;
+out:
+	return ret;
+}
+
+static int
+bnad_debugfs_open_drvinfo(struct inode *inode, struct file *file)
+{
+	struct bnad *bnad = inode->i_private;
+	struct bnad_debug_info *drv_info;
+	int rc;
+
+	drv_info = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
+	if (!drv_info)
+		return -ENOMEM;
+
+	drv_info->buffer_len = sizeof(struct bnad_drvinfo);
+
+	drv_info->debug_buffer = kzalloc(drv_info->buffer_len, GFP_KERNEL);
+	if (!drv_info->debug_buffer) {
+		kfree(drv_info);
+		drv_info = NULL;
+		return -ENOMEM;
+	}
+
+	mutex_lock(&bnad->conf_mutex);
+	rc = bnad_get_debug_drvinfo(bnad, drv_info->debug_buffer,
+				drv_info->buffer_len);
+	mutex_unlock(&bnad->conf_mutex);
+	if (rc != BFA_STATUS_OK) {
+		kfree(drv_info->debug_buffer);
+		drv_info->debug_buffer = NULL;
+		kfree(drv_info);
+		drv_info = NULL;
+		netdev_warn(bnad->netdev, "failed to collect drvinfo\n");
+		return -ENOMEM;
+	}
+
+	file->private_data = drv_info;
+
+	return 0;
+}
+
+/* Changes the current file position */
+static loff_t
+bnad_debugfs_lseek(struct file *file, loff_t offset, int orig)
+{
+	struct bnad_debug_info *debug = file->private_data;
+
+	if (!debug)
+		return -EINVAL;
+
+	return fixed_size_llseek(file, offset, orig, debug->buffer_len);
+}
+
+static ssize_t
+bnad_debugfs_read(struct file *file, char __user *buf,
+		  size_t nbytes, loff_t *pos)
+{
+	struct bnad_debug_info *debug = file->private_data;
+
+	if (!debug || !debug->debug_buffer)
+		return 0;
+
+	return simple_read_from_buffer(buf, nbytes, pos,
+				debug->debug_buffer, debug->buffer_len);
+}
+
+#define BFA_REG_CT_ADDRSZ	(0x40000)
+#define BFA_REG_CB_ADDRSZ	(0x20000)
+#define BFA_REG_ADDRSZ(__ioc)	\
+	((u32)(bfa_asic_id_ctc(bfa_ioc_devid(__ioc)) ?  \
+	 BFA_REG_CT_ADDRSZ : BFA_REG_CB_ADDRSZ))
+#define BFA_REG_ADDRMSK(__ioc)	(BFA_REG_ADDRSZ(__ioc) - 1)
+
+/*
+ * Function to check if the register offset passed is valid.
+ */
+static int
+bna_reg_offset_check(struct bfa_ioc *ioc, u32 offset, u32 len)
+{
+	u8 area;
+
+	/* check [16:15] */
+	area = (offset >> 15) & 0x7;
+	if (area == 0) {
+		/* PCIe core register */
+		if (offset + (len << 2) > 0x8000)	/* 8k dwords or 32KB */
+			return BFA_STATUS_EINVAL;
+	} else if (area == 0x1) {
+		/* CB 32 KB memory page */
+		if (offset + (len << 2) > 0x10000)	/* 8k dwords or 32KB */
+			return BFA_STATUS_EINVAL;
+	} else {
+		/* CB register space 64KB */
+		if (offset + (len << 2) > BFA_REG_ADDRMSK(ioc))
+			return BFA_STATUS_EINVAL;
+	}
+	return BFA_STATUS_OK;
+}
+
+static ssize_t
+bnad_debugfs_read_regrd(struct file *file, char __user *buf,
+			size_t nbytes, loff_t *pos)
+{
+	struct bnad_debug_info *regrd_debug = file->private_data;
+	struct bnad *bnad = (struct bnad *)regrd_debug->i_private;
+	ssize_t rc;
+
+	if (!bnad->regdata)
+		return 0;
+
+	rc = simple_read_from_buffer(buf, nbytes, pos,
+			bnad->regdata, bnad->reglen);
+
+	if ((*pos + nbytes) >= bnad->reglen) {
+		kfree(bnad->regdata);
+		bnad->regdata = NULL;
+		bnad->reglen = 0;
+	}
+
+	return rc;
+}
+
+static ssize_t
+bnad_debugfs_write_regrd(struct file *file, const char __user *buf,
+		size_t nbytes, loff_t *ppos)
+{
+	struct bnad_debug_info *regrd_debug = file->private_data;
+	struct bnad *bnad = (struct bnad *)regrd_debug->i_private;
+	struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc;
+	int rc, i;
+	u32 addr, len;
+	u32 *regbuf;
+	void __iomem *rb, *reg_addr;
+	unsigned long flags;
+	void *kern_buf;
+
+	/* Copy the user space buf */
+	kern_buf = memdup_user(buf, nbytes);
+	if (IS_ERR(kern_buf))
+		return PTR_ERR(kern_buf);
+
+	rc = sscanf(kern_buf, "%x:%x", &addr, &len);
+	if (rc < 2 || len > UINT_MAX >> 2) {
+		netdev_warn(bnad->netdev, "failed to read user buffer\n");
+		kfree(kern_buf);
+		return -EINVAL;
+	}
+
+	kfree(kern_buf);
+	kfree(bnad->regdata);
+	bnad->reglen = 0;
+
+	bnad->regdata = kzalloc(len << 2, GFP_KERNEL);
+	if (!bnad->regdata)
+		return -ENOMEM;
+
+	bnad->reglen = len << 2;
+	rb = bfa_ioc_bar0(ioc);
+	addr &= BFA_REG_ADDRMSK(ioc);
+
+	/* offset and len sanity check */
+	rc = bna_reg_offset_check(ioc, addr, len);
+	if (rc) {
+		netdev_warn(bnad->netdev, "failed reg offset check\n");
+		kfree(bnad->regdata);
+		bnad->regdata = NULL;
+		bnad->reglen = 0;
+		return -EINVAL;
+	}
+
+	reg_addr = rb + addr;
+	regbuf =  (u32 *)bnad->regdata;
+	spin_lock_irqsave(&bnad->bna_lock, flags);
+	for (i = 0; i < len; i++) {
+		*regbuf = readl(reg_addr);
+		regbuf++;
+		reg_addr += sizeof(u32);
+	}
+	spin_unlock_irqrestore(&bnad->bna_lock, flags);
+
+	return nbytes;
+}
+
+static ssize_t
+bnad_debugfs_write_regwr(struct file *file, const char __user *buf,
+		size_t nbytes, loff_t *ppos)
+{
+	struct bnad_debug_info *debug = file->private_data;
+	struct bnad *bnad = (struct bnad *)debug->i_private;
+	struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc;
+	int rc;
+	u32 addr, val;
+	void __iomem *reg_addr;
+	unsigned long flags;
+	void *kern_buf;
+
+	/* Copy the user space buf */
+	kern_buf = memdup_user(buf, nbytes);
+	if (IS_ERR(kern_buf))
+		return PTR_ERR(kern_buf);
+
+	rc = sscanf(kern_buf, "%x:%x", &addr, &val);
+	if (rc < 2) {
+		netdev_warn(bnad->netdev, "failed to read user buffer\n");
+		kfree(kern_buf);
+		return -EINVAL;
+	}
+	kfree(kern_buf);
+
+	addr &= BFA_REG_ADDRMSK(ioc); /* offset only 17 bit and word align */
+
+	/* offset and len sanity check */
+	rc = bna_reg_offset_check(ioc, addr, 1);
+	if (rc) {
+		netdev_warn(bnad->netdev, "failed reg offset check\n");
+		return -EINVAL;
+	}
+
+	reg_addr = (bfa_ioc_bar0(ioc)) + addr;
+	spin_lock_irqsave(&bnad->bna_lock, flags);
+	writel(val, reg_addr);
+	spin_unlock_irqrestore(&bnad->bna_lock, flags);
+
+	return nbytes;
+}
+
+static int
+bnad_debugfs_release(struct inode *inode, struct file *file)
+{
+	struct bnad_debug_info *debug = file->private_data;
+
+	if (!debug)
+		return 0;
+
+	file->private_data = NULL;
+	kfree(debug);
+	return 0;
+}
+
+static int
+bnad_debugfs_buffer_release(struct inode *inode, struct file *file)
+{
+	struct bnad_debug_info *debug = file->private_data;
+
+	if (!debug)
+		return 0;
+
+	kfree(debug->debug_buffer);
+
+	file->private_data = NULL;
+	kfree(debug);
+	debug = NULL;
+	return 0;
+}
+
+static const struct file_operations bnad_debugfs_op_fwtrc = {
+	.owner		=	THIS_MODULE,
+	.open		=	bnad_debugfs_open_fwtrc,
+	.llseek		=	bnad_debugfs_lseek,
+	.read		=	bnad_debugfs_read,
+	.release	=	bnad_debugfs_buffer_release,
+};
+
+static const struct file_operations bnad_debugfs_op_fwsave = {
+	.owner		=	THIS_MODULE,
+	.open		=	bnad_debugfs_open_fwsave,
+	.llseek		=	bnad_debugfs_lseek,
+	.read		=	bnad_debugfs_read,
+	.release	=	bnad_debugfs_buffer_release,
+};
+
+static const struct file_operations bnad_debugfs_op_regrd = {
+	.owner		=       THIS_MODULE,
+	.open		=	bnad_debugfs_open_reg,
+	.llseek		=	bnad_debugfs_lseek,
+	.read		=	bnad_debugfs_read_regrd,
+	.write		=	bnad_debugfs_write_regrd,
+	.release	=	bnad_debugfs_release,
+};
+
+static const struct file_operations bnad_debugfs_op_regwr = {
+	.owner		=	THIS_MODULE,
+	.open		=	bnad_debugfs_open_reg,
+	.llseek		=	bnad_debugfs_lseek,
+	.write		=	bnad_debugfs_write_regwr,
+	.release	=	bnad_debugfs_release,
+};
+
+static const struct file_operations bnad_debugfs_op_drvinfo = {
+	.owner		=	THIS_MODULE,
+	.open		=	bnad_debugfs_open_drvinfo,
+	.llseek		=	bnad_debugfs_lseek,
+	.read		=	bnad_debugfs_read,
+	.release	=	bnad_debugfs_buffer_release,
+};
+
+struct bnad_debugfs_entry {
+	const char *name;
+	umode_t  mode;
+	const struct file_operations *fops;
+};
+
+static const struct bnad_debugfs_entry bnad_debugfs_files[] = {
+	{ "fwtrc",  S_IFREG | 0444, &bnad_debugfs_op_fwtrc, },
+	{ "fwsave", S_IFREG | 0444, &bnad_debugfs_op_fwsave, },
+	{ "regrd",  S_IFREG | 0644, &bnad_debugfs_op_regrd, },
+	{ "regwr",  S_IFREG | 0200, &bnad_debugfs_op_regwr, },
+	{ "drvinfo", S_IFREG | 0444, &bnad_debugfs_op_drvinfo, },
+};
+
+static struct dentry *bna_debugfs_root;
+static atomic_t bna_debugfs_port_count;
+
+/* Initialize debugfs interface for BNA */
+void
+bnad_debugfs_init(struct bnad *bnad)
+{
+	const struct bnad_debugfs_entry *file;
+	char name[64];
+	int i;
+
+	/* Setup the BNA debugfs root directory*/
+	if (!bna_debugfs_root) {
+		bna_debugfs_root = debugfs_create_dir("bna", NULL);
+		atomic_set(&bna_debugfs_port_count, 0);
+		if (!bna_debugfs_root) {
+			netdev_warn(bnad->netdev,
+				    "debugfs root dir creation failed\n");
+			return;
+		}
+	}
+
+	/* Setup the pci_dev debugfs directory for the port */
+	snprintf(name, sizeof(name), "pci_dev:%s", pci_name(bnad->pcidev));
+	if (!bnad->port_debugfs_root) {
+		bnad->port_debugfs_root =
+			debugfs_create_dir(name, bna_debugfs_root);
+		if (!bnad->port_debugfs_root) {
+			netdev_warn(bnad->netdev,
+				    "debugfs root dir creation failed\n");
+			return;
+		}
+
+		atomic_inc(&bna_debugfs_port_count);
+
+		for (i = 0; i < ARRAY_SIZE(bnad_debugfs_files); i++) {
+			file = &bnad_debugfs_files[i];
+			bnad->bnad_dentry_files[i] =
+					debugfs_create_file(file->name,
+							file->mode,
+							bnad->port_debugfs_root,
+							bnad,
+							file->fops);
+			if (!bnad->bnad_dentry_files[i]) {
+				netdev_warn(bnad->netdev,
+					    "create %s entry failed\n",
+					    file->name);
+				return;
+			}
+		}
+	}
+}
+
+/* Uninitialize debugfs interface for BNA */
+void
+bnad_debugfs_uninit(struct bnad *bnad)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(bnad_debugfs_files); i++) {
+		if (bnad->bnad_dentry_files[i]) {
+			debugfs_remove(bnad->bnad_dentry_files[i]);
+			bnad->bnad_dentry_files[i] = NULL;
+		}
+	}
+
+	/* Remove the pci_dev debugfs directory for the port */
+	if (bnad->port_debugfs_root) {
+		debugfs_remove(bnad->port_debugfs_root);
+		bnad->port_debugfs_root = NULL;
+		atomic_dec(&bna_debugfs_port_count);
+	}
+
+	/* Remove the BNA debugfs root directory */
+	if (atomic_read(&bna_debugfs_port_count) == 0) {
+		debugfs_remove(bna_debugfs_root);
+		bna_debugfs_root = NULL;
+	}
+}