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, 451 insertions, 0 deletions

diff --git a/drivers/net/wireless/broadcom/b43legacy/debugfs.c b/drivers/net/wireless/broadcom/b43legacy/debugfs.c
new file mode 100644
index 000000000..6b0e8d117
--- /dev/null
+++ b/drivers/net/wireless/broadcom/b43legacy/debugfs.c
@@ -0,0 +1,451 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+
+  Broadcom B43legacy wireless driver
+
+  debugfs driver debugging code
+
+  Copyright (c) 2005-2007 Michael Buesch <m@bues.ch>
+
+
+*/
+
+#include <linux/fs.h>
+#include <linux/debugfs.h>
+#include <linux/slab.h>
+#include <linux/netdevice.h>
+#include <linux/pci.h>
+#include <linux/mutex.h>
+
+#include "b43legacy.h"
+#include "main.h"
+#include "debugfs.h"
+#include "dma.h"
+#include "pio.h"
+#include "xmit.h"
+
+
+/* The root directory. */
+static struct dentry *rootdir;
+
+struct b43legacy_debugfs_fops {
+	ssize_t (*read)(struct b43legacy_wldev *dev, char *buf, size_t bufsize);
+	int (*write)(struct b43legacy_wldev *dev, const char *buf, size_t count);
+	struct file_operations fops;
+	/* Offset of struct b43legacy_dfs_file in struct b43legacy_dfsentry */
+	size_t file_struct_offset;
+	/* Take wl->irq_lock before calling read/write? */
+	bool take_irqlock;
+};
+
+static inline
+struct b43legacy_dfs_file * fops_to_dfs_file(struct b43legacy_wldev *dev,
+				       const struct b43legacy_debugfs_fops *dfops)
+{
+	void *p;
+
+	p = dev->dfsentry;
+	p += dfops->file_struct_offset;
+
+	return p;
+}
+
+
+#define fappend(fmt, x...)	\
+	do {							\
+		if (bufsize - count)				\
+			count += scnprintf(buf + count,		\
+					  bufsize - count,	\
+					  fmt , ##x);		\
+		else						\
+			printk(KERN_ERR "b43legacy: fappend overflow\n"); \
+	} while (0)
+
+
+/* wl->irq_lock is locked */
+static ssize_t tsf_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize)
+{
+	ssize_t count = 0;
+	u64 tsf;
+
+	b43legacy_tsf_read(dev, &tsf);
+	fappend("0x%08x%08x\n",
+		(unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
+		(unsigned int)(tsf & 0xFFFFFFFFULL));
+
+	return count;
+}
+
+/* wl->irq_lock is locked */
+static int tsf_write_file(struct b43legacy_wldev *dev, const char *buf, size_t count)
+{
+	u64 tsf;
+
+	if (sscanf(buf, "%llu", (unsigned long long *)(&tsf)) != 1)
+		return -EINVAL;
+	b43legacy_tsf_write(dev, tsf);
+
+	return 0;
+}
+
+/* wl->irq_lock is locked */
+static ssize_t ucode_regs_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize)
+{
+	ssize_t count = 0;
+	int i;
+
+	for (i = 0; i < 64; i++) {
+		fappend("r%d = 0x%04x\n", i,
+			b43legacy_shm_read16(dev, B43legacy_SHM_WIRELESS, i));
+	}
+
+	return count;
+}
+
+/* wl->irq_lock is locked */
+static ssize_t shm_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize)
+{
+	ssize_t count = 0;
+	int i;
+	u16 tmp;
+	__le16 *le16buf = (__le16 *)buf;
+
+	for (i = 0; i < 0x1000; i++) {
+		if (bufsize < sizeof(tmp))
+			break;
+		tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 2 * i);
+		le16buf[i] = cpu_to_le16(tmp);
+		count += sizeof(tmp);
+		bufsize -= sizeof(tmp);
+	}
+
+	return count;
+}
+
+static ssize_t txstat_read_file(struct b43legacy_wldev *dev, char *buf, size_t bufsize)
+{
+	struct b43legacy_txstatus_log *log = &dev->dfsentry->txstatlog;
+	ssize_t count = 0;
+	unsigned long flags;
+	int i, idx;
+	struct b43legacy_txstatus *stat;
+
+	spin_lock_irqsave(&log->lock, flags);
+	if (log->end < 0) {
+		fappend("Nothing transmitted, yet\n");
+		goto out_unlock;
+	}
+	fappend("b43legacy TX status reports:\n\n"
+		"index | cookie | seq | phy_stat | frame_count | "
+		"rts_count | supp_reason | pm_indicated | "
+		"intermediate | for_ampdu | acked\n" "---\n");
+	i = log->end + 1;
+	idx = 0;
+	while (1) {
+		if (i == B43legacy_NR_LOGGED_TXSTATUS)
+			i = 0;
+		stat = &(log->log[i]);
+		if (stat->cookie) {
+			fappend("%03d | "
+				"0x%04X | 0x%04X | 0x%02X | "
+				"0x%X | 0x%X | "
+				"%u | %u | "
+				"%u | %u | %u\n",
+				idx,
+				stat->cookie, stat->seq, stat->phy_stat,
+				stat->frame_count, stat->rts_count,
+				stat->supp_reason, stat->pm_indicated,
+				stat->intermediate, stat->for_ampdu,
+				stat->acked);
+			idx++;
+		}
+		if (i == log->end)
+			break;
+		i++;
+	}
+out_unlock:
+	spin_unlock_irqrestore(&log->lock, flags);
+
+	return count;
+}
+
+/* wl->irq_lock is locked */
+static int restart_write_file(struct b43legacy_wldev *dev, const char *buf, size_t count)
+{
+	int err = 0;
+
+	if (count > 0 && buf[0] == '1') {
+		b43legacy_controller_restart(dev, "manually restarted");
+	} else
+		err = -EINVAL;
+
+	return err;
+}
+
+#undef fappend
+
+static ssize_t b43legacy_debugfs_read(struct file *file, char __user *userbuf,
+				size_t count, loff_t *ppos)
+{
+	struct b43legacy_wldev *dev;
+	struct b43legacy_debugfs_fops *dfops;
+	struct b43legacy_dfs_file *dfile;
+	ssize_t ret;
+	char *buf;
+	const size_t bufsize = 1024 * 16; /* 16 KiB buffer */
+	const size_t buforder = get_order(bufsize);
+	int err = 0;
+
+	if (!count)
+		return 0;
+	dev = file->private_data;
+	if (!dev)
+		return -ENODEV;
+
+	mutex_lock(&dev->wl->mutex);
+	if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
+		err = -ENODEV;
+		goto out_unlock;
+	}
+
+	dfops = container_of(debugfs_real_fops(file),
+			     struct b43legacy_debugfs_fops, fops);
+	if (!dfops->read) {
+		err = -ENOSYS;
+		goto out_unlock;
+	}
+	dfile = fops_to_dfs_file(dev, dfops);
+
+	if (!dfile->buffer) {
+		buf = (char *)__get_free_pages(GFP_KERNEL, buforder);
+		if (!buf) {
+			err = -ENOMEM;
+			goto out_unlock;
+		}
+		memset(buf, 0, bufsize);
+		if (dfops->take_irqlock) {
+			spin_lock_irq(&dev->wl->irq_lock);
+			ret = dfops->read(dev, buf, bufsize);
+			spin_unlock_irq(&dev->wl->irq_lock);
+		} else
+			ret = dfops->read(dev, buf, bufsize);
+		if (ret <= 0) {
+			free_pages((unsigned long)buf, buforder);
+			err = ret;
+			goto out_unlock;
+		}
+		dfile->data_len = ret;
+		dfile->buffer = buf;
+	}
+
+	ret = simple_read_from_buffer(userbuf, count, ppos,
+				      dfile->buffer,
+				      dfile->data_len);
+	if (*ppos >= dfile->data_len) {
+		free_pages((unsigned long)dfile->buffer, buforder);
+		dfile->buffer = NULL;
+		dfile->data_len = 0;
+	}
+out_unlock:
+	mutex_unlock(&dev->wl->mutex);
+
+	return err ? err : ret;
+}
+
+static ssize_t b43legacy_debugfs_write(struct file *file,
+				 const char __user *userbuf,
+				 size_t count, loff_t *ppos)
+{
+	struct b43legacy_wldev *dev;
+	struct b43legacy_debugfs_fops *dfops;
+	char *buf;
+	int err = 0;
+
+	if (!count)
+		return 0;
+	if (count > PAGE_SIZE)
+		return -E2BIG;
+	dev = file->private_data;
+	if (!dev)
+		return -ENODEV;
+
+	mutex_lock(&dev->wl->mutex);
+	if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
+		err = -ENODEV;
+		goto out_unlock;
+	}
+
+	dfops = container_of(debugfs_real_fops(file),
+			     struct b43legacy_debugfs_fops, fops);
+	if (!dfops->write) {
+		err = -ENOSYS;
+		goto out_unlock;
+	}
+
+	buf = (char *)get_zeroed_page(GFP_KERNEL);
+	if (!buf) {
+		err = -ENOMEM;
+		goto out_unlock;
+	}
+	if (copy_from_user(buf, userbuf, count)) {
+		err = -EFAULT;
+		goto out_freepage;
+	}
+	if (dfops->take_irqlock) {
+		spin_lock_irq(&dev->wl->irq_lock);
+		err = dfops->write(dev, buf, count);
+		spin_unlock_irq(&dev->wl->irq_lock);
+	} else
+		err = dfops->write(dev, buf, count);
+	if (err)
+		goto out_freepage;
+
+out_freepage:
+	free_page((unsigned long)buf);
+out_unlock:
+	mutex_unlock(&dev->wl->mutex);
+
+	return err ? err : count;
+}
+
+
+#define B43legacy_DEBUGFS_FOPS(name, _read, _write, _take_irqlock)	\
+	static struct b43legacy_debugfs_fops fops_##name = {		\
+		.read	= _read,				\
+		.write	= _write,				\
+		.fops	= {					\
+			.open	= simple_open,				\
+			.read	= b43legacy_debugfs_read,		\
+			.write	= b43legacy_debugfs_write,		\
+			.llseek = generic_file_llseek,			\
+		},						\
+		.file_struct_offset = offsetof(struct b43legacy_dfsentry, \
+					       file_##name),	\
+		.take_irqlock	= _take_irqlock,		\
+	}
+
+B43legacy_DEBUGFS_FOPS(tsf, tsf_read_file, tsf_write_file, 1);
+B43legacy_DEBUGFS_FOPS(ucode_regs, ucode_regs_read_file, NULL, 1);
+B43legacy_DEBUGFS_FOPS(shm, shm_read_file, NULL, 1);
+B43legacy_DEBUGFS_FOPS(txstat, txstat_read_file, NULL, 0);
+B43legacy_DEBUGFS_FOPS(restart, NULL, restart_write_file, 1);
+
+
+int b43legacy_debug(struct b43legacy_wldev *dev, enum b43legacy_dyndbg feature)
+{
+	return !!(dev->dfsentry && dev->dfsentry->dyn_debug[feature]);
+}
+
+static void b43legacy_add_dynamic_debug(struct b43legacy_wldev *dev)
+{
+	struct b43legacy_dfsentry *e = dev->dfsentry;
+
+#define add_dyn_dbg(name, id, initstate) do {			\
+	e->dyn_debug[id] = (initstate);				\
+	debugfs_create_bool(name, 0600, e->subdir,		\
+			    &(e->dyn_debug[id]));		\
+	} while (0)
+
+	add_dyn_dbg("debug_xmitpower", B43legacy_DBG_XMITPOWER, false);
+	add_dyn_dbg("debug_dmaoverflow", B43legacy_DBG_DMAOVERFLOW, false);
+	add_dyn_dbg("debug_dmaverbose", B43legacy_DBG_DMAVERBOSE, false);
+	add_dyn_dbg("debug_pwork_fast", B43legacy_DBG_PWORK_FAST, false);
+	add_dyn_dbg("debug_pwork_stop", B43legacy_DBG_PWORK_STOP, false);
+
+#undef add_dyn_dbg
+}
+
+void b43legacy_debugfs_add_device(struct b43legacy_wldev *dev)
+{
+	struct b43legacy_dfsentry *e;
+	struct b43legacy_txstatus_log *log;
+	char devdir[16];
+
+	B43legacy_WARN_ON(!dev);
+	e = kzalloc(sizeof(*e), GFP_KERNEL);
+	if (!e) {
+		b43legacyerr(dev->wl, "debugfs: add device OOM\n");
+		return;
+	}
+	e->dev = dev;
+	log = &e->txstatlog;
+	log->log = kcalloc(B43legacy_NR_LOGGED_TXSTATUS,
+			   sizeof(struct b43legacy_txstatus), GFP_KERNEL);
+	if (!log->log) {
+		b43legacyerr(dev->wl, "debugfs: add device txstatus OOM\n");
+		kfree(e);
+		return;
+	}
+	log->end = -1;
+	spin_lock_init(&log->lock);
+
+	dev->dfsentry = e;
+
+	snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
+	e->subdir = debugfs_create_dir(devdir, rootdir);
+
+#define ADD_FILE(name, mode)	\
+	do {							\
+		debugfs_create_file(__stringify(name), mode,	\
+				    e->subdir, dev,		\
+				    &fops_##name.fops);		\
+	} while (0)
+
+
+	ADD_FILE(tsf, 0600);
+	ADD_FILE(ucode_regs, 0400);
+	ADD_FILE(shm, 0400);
+	ADD_FILE(txstat, 0400);
+	ADD_FILE(restart, 0200);
+
+#undef ADD_FILE
+
+	b43legacy_add_dynamic_debug(dev);
+}
+
+void b43legacy_debugfs_remove_device(struct b43legacy_wldev *dev)
+{
+	struct b43legacy_dfsentry *e;
+
+	if (!dev)
+		return;
+	e = dev->dfsentry;
+	if (!e)
+		return;
+
+	debugfs_remove(e->subdir);
+	kfree(e->txstatlog.log);
+	kfree(e);
+}
+
+void b43legacy_debugfs_log_txstat(struct b43legacy_wldev *dev,
+			    const struct b43legacy_txstatus *status)
+{
+	struct b43legacy_dfsentry *e = dev->dfsentry;
+	struct b43legacy_txstatus_log *log;
+	struct b43legacy_txstatus *cur;
+	int i;
+
+	if (!e)
+		return;
+	log = &e->txstatlog;
+	B43legacy_WARN_ON(!irqs_disabled());
+	spin_lock(&log->lock);
+	i = log->end + 1;
+	if (i == B43legacy_NR_LOGGED_TXSTATUS)
+		i = 0;
+	log->end = i;
+	cur = &(log->log[i]);
+	memcpy(cur, status, sizeof(*cur));
+	spin_unlock(&log->lock);
+}
+
+void b43legacy_debugfs_init(void)
+{
+	rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
+}
+
+void b43legacy_debugfs_exit(void)
+{
+	debugfs_remove(rootdir);
+}