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, 537 insertions, 0 deletions

diff --git a/drivers/media/common/siano/smsdvb-debugfs.c b/drivers/media/common/siano/smsdvb-debugfs.c
new file mode 100644
index 000000000..8916bb644
--- /dev/null
+++ b/drivers/media/common/siano/smsdvb-debugfs.c
@@ -0,0 +1,537 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Copyright(c) 2013 Mauro Carvalho Chehab
+
+#include "smscoreapi.h"
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/debugfs.h>
+#include <linux/spinlock.h>
+#include <linux/usb.h>
+
+#include <media/dmxdev.h>
+#include <media/dvbdev.h>
+#include <media/dvb_demux.h>
+#include <media/dvb_frontend.h>
+
+#include "smsdvb.h"
+
+static struct dentry *smsdvb_debugfs_usb_root;
+
+struct smsdvb_debugfs {
+	struct kref		refcount;
+	spinlock_t		lock;
+
+	char			stats_data[PAGE_SIZE];
+	unsigned		stats_count;
+	bool			stats_was_read;
+
+	wait_queue_head_t	stats_queue;
+};
+
+static void smsdvb_print_dvb_stats(struct smsdvb_debugfs *debug_data,
+			    struct sms_stats *p)
+{
+	int n = 0;
+	char *buf;
+
+	spin_lock(&debug_data->lock);
+	if (debug_data->stats_count) {
+		spin_unlock(&debug_data->lock);
+		return;
+	}
+
+	buf = debug_data->stats_data;
+
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "is_rf_locked = %d\n", p->is_rf_locked);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "is_demod_locked = %d\n", p->is_demod_locked);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "is_external_lna_on = %d\n", p->is_external_lna_on);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "SNR = %d\n", p->SNR);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "ber = %d\n", p->ber);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "FIB_CRC = %d\n", p->FIB_CRC);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "ts_per = %d\n", p->ts_per);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "MFER = %d\n", p->MFER);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "RSSI = %d\n", p->RSSI);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "in_band_pwr = %d\n", p->in_band_pwr);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "carrier_offset = %d\n", p->carrier_offset);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "modem_state = %d\n", p->modem_state);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "frequency = %d\n", p->frequency);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "bandwidth = %d\n", p->bandwidth);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "transmission_mode = %d\n", p->transmission_mode);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "modem_state = %d\n", p->modem_state);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "guard_interval = %d\n", p->guard_interval);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "code_rate = %d\n", p->code_rate);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "lp_code_rate = %d\n", p->lp_code_rate);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "hierarchy = %d\n", p->hierarchy);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "constellation = %d\n", p->constellation);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "burst_size = %d\n", p->burst_size);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "burst_duration = %d\n", p->burst_duration);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "burst_cycle_time = %d\n", p->burst_cycle_time);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "calc_burst_cycle_time = %d\n",
+		      p->calc_burst_cycle_time);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "num_of_rows = %d\n", p->num_of_rows);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "num_of_padd_cols = %d\n", p->num_of_padd_cols);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "num_of_punct_cols = %d\n", p->num_of_punct_cols);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "error_ts_packets = %d\n", p->error_ts_packets);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "total_ts_packets = %d\n", p->total_ts_packets);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "num_of_valid_mpe_tlbs = %d\n", p->num_of_valid_mpe_tlbs);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "num_of_invalid_mpe_tlbs = %d\n", p->num_of_invalid_mpe_tlbs);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "num_of_corrected_mpe_tlbs = %d\n", p->num_of_corrected_mpe_tlbs);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "ber_error_count = %d\n", p->ber_error_count);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "ber_bit_count = %d\n", p->ber_bit_count);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "pre_ber = %d\n", p->pre_ber);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "cell_id = %d\n", p->cell_id);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "dvbh_srv_ind_hp = %d\n", p->dvbh_srv_ind_hp);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "dvbh_srv_ind_lp = %d\n", p->dvbh_srv_ind_lp);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "num_mpe_received = %d\n", p->num_mpe_received);
+
+	debug_data->stats_count = n;
+	spin_unlock(&debug_data->lock);
+	wake_up(&debug_data->stats_queue);
+}
+
+static void smsdvb_print_isdb_stats(struct smsdvb_debugfs *debug_data,
+			     struct sms_isdbt_stats *p)
+{
+	int i, n = 0;
+	char *buf;
+
+	spin_lock(&debug_data->lock);
+	if (debug_data->stats_count) {
+		spin_unlock(&debug_data->lock);
+		return;
+	}
+
+	buf = debug_data->stats_data;
+
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "statistics_type = %d\t", p->statistics_type);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "full_size = %d\n", p->full_size);
+
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "is_rf_locked = %d\t\t", p->is_rf_locked);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "is_demod_locked = %d\t", p->is_demod_locked);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "is_external_lna_on = %d\n", p->is_external_lna_on);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "SNR = %d dB\t\t", p->SNR);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "RSSI = %d dBm\t\t", p->RSSI);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "in_band_pwr = %d dBm\n", p->in_band_pwr);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "carrier_offset = %d\t", p->carrier_offset);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "bandwidth = %d\t\t", p->bandwidth);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "frequency = %d Hz\n", p->frequency);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "transmission_mode = %d\t", p->transmission_mode);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "modem_state = %d\t\t", p->modem_state);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "guard_interval = %d\n", p->guard_interval);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "system_type = %d\t\t", p->system_type);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "partial_reception = %d\t", p->partial_reception);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "num_of_layers = %d\n", p->num_of_layers);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "sms_to_host_tx_errors = %d\n", p->sms_to_host_tx_errors);
+
+	for (i = 0; i < 3; i++) {
+		if (p->layer_info[i].number_of_segments < 1 ||
+		    p->layer_info[i].number_of_segments > 13)
+			continue;
+
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
+			      p->layer_info[i].code_rate);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
+			      p->layer_info[i].constellation);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
+			      p->layer_info[i].ber);
+		n += scnprintf(&buf[n], PAGE_SIZE - n,
+			      "\tber_error_count = %-5d\t",
+			      p->layer_info[i].ber_error_count);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
+			      p->layer_info[i].ber_bit_count);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
+			      p->layer_info[i].pre_ber);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
+			      p->layer_info[i].ts_per);
+		n += scnprintf(&buf[n], PAGE_SIZE - n,
+			      "\terror_ts_packets = %-5d\t",
+			      p->layer_info[i].error_ts_packets);
+		n += scnprintf(&buf[n], PAGE_SIZE - n,
+			      "total_ts_packets = %-5d\t",
+			      p->layer_info[i].total_ts_packets);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
+			      p->layer_info[i].ti_ldepth_i);
+		n += scnprintf(&buf[n], PAGE_SIZE - n,
+			      "\tnumber_of_segments = %d\t",
+			      p->layer_info[i].number_of_segments);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
+			      p->layer_info[i].tmcc_errors);
+	}
+
+	debug_data->stats_count = n;
+	spin_unlock(&debug_data->lock);
+	wake_up(&debug_data->stats_queue);
+}
+
+static void smsdvb_print_isdb_stats_ex(struct smsdvb_debugfs *debug_data,
+				struct sms_isdbt_stats_ex *p)
+{
+	int i, n = 0;
+	char *buf;
+
+	spin_lock(&debug_data->lock);
+	if (debug_data->stats_count) {
+		spin_unlock(&debug_data->lock);
+		return;
+	}
+
+	buf = debug_data->stats_data;
+
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "statistics_type = %d\t", p->statistics_type);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "full_size = %d\n", p->full_size);
+
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "is_rf_locked = %d\t\t", p->is_rf_locked);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "is_demod_locked = %d\t", p->is_demod_locked);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "is_external_lna_on = %d\n", p->is_external_lna_on);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "SNR = %d dB\t\t", p->SNR);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "RSSI = %d dBm\t\t", p->RSSI);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "in_band_pwr = %d dBm\n", p->in_band_pwr);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "carrier_offset = %d\t", p->carrier_offset);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "bandwidth = %d\t\t", p->bandwidth);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "frequency = %d Hz\n", p->frequency);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "transmission_mode = %d\t", p->transmission_mode);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "modem_state = %d\t\t", p->modem_state);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "guard_interval = %d\n", p->guard_interval);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "system_type = %d\t\t", p->system_type);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "partial_reception = %d\t", p->partial_reception);
+	n += scnprintf(&buf[n], PAGE_SIZE - n,
+		      "num_of_layers = %d\n", p->num_of_layers);
+	n += scnprintf(&buf[n], PAGE_SIZE - n, "segment_number = %d\t",
+		      p->segment_number);
+	n += scnprintf(&buf[n], PAGE_SIZE - n, "tune_bw = %d\n",
+		      p->tune_bw);
+
+	for (i = 0; i < 3; i++) {
+		if (p->layer_info[i].number_of_segments < 1 ||
+		    p->layer_info[i].number_of_segments > 13)
+			continue;
+
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "\nLayer %d\n", i);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "\tcode_rate = %d\t",
+			      p->layer_info[i].code_rate);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "constellation = %d\n",
+			      p->layer_info[i].constellation);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "\tber = %-5d\t",
+			      p->layer_info[i].ber);
+		n += scnprintf(&buf[n], PAGE_SIZE - n,
+			      "\tber_error_count = %-5d\t",
+			      p->layer_info[i].ber_error_count);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "ber_bit_count = %-5d\n",
+			      p->layer_info[i].ber_bit_count);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "\tpre_ber = %-5d\t",
+			      p->layer_info[i].pre_ber);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "\tts_per = %-5d\n",
+			      p->layer_info[i].ts_per);
+		n += scnprintf(&buf[n], PAGE_SIZE - n,
+			      "\terror_ts_packets = %-5d\t",
+			      p->layer_info[i].error_ts_packets);
+		n += scnprintf(&buf[n], PAGE_SIZE - n,
+			      "total_ts_packets = %-5d\t",
+			      p->layer_info[i].total_ts_packets);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "ti_ldepth_i = %d\n",
+			      p->layer_info[i].ti_ldepth_i);
+		n += scnprintf(&buf[n], PAGE_SIZE - n,
+			      "\tnumber_of_segments = %d\t",
+			      p->layer_info[i].number_of_segments);
+		n += scnprintf(&buf[n], PAGE_SIZE - n, "tmcc_errors = %d\n",
+			      p->layer_info[i].tmcc_errors);
+	}
+
+
+	debug_data->stats_count = n;
+	spin_unlock(&debug_data->lock);
+
+	wake_up(&debug_data->stats_queue);
+}
+
+static int smsdvb_stats_open(struct inode *inode, struct file *file)
+{
+	struct smsdvb_client_t *client = inode->i_private;
+	struct smsdvb_debugfs *debug_data = client->debug_data;
+
+	kref_get(&debug_data->refcount);
+
+	spin_lock(&debug_data->lock);
+	debug_data->stats_count = 0;
+	debug_data->stats_was_read = false;
+	spin_unlock(&debug_data->lock);
+
+	file->private_data = debug_data;
+
+	return 0;
+}
+
+static void smsdvb_debugfs_data_release(struct kref *ref)
+{
+	struct smsdvb_debugfs *debug_data;
+
+	debug_data = container_of(ref, struct smsdvb_debugfs, refcount);
+	kfree(debug_data);
+}
+
+static int smsdvb_stats_wait_read(struct smsdvb_debugfs *debug_data)
+{
+	int rc = 1;
+
+	spin_lock(&debug_data->lock);
+
+	if (debug_data->stats_was_read)
+		goto exit;
+
+	rc = debug_data->stats_count;
+
+exit:
+	spin_unlock(&debug_data->lock);
+	return rc;
+}
+
+static __poll_t smsdvb_stats_poll(struct file *file, poll_table *wait)
+{
+	struct smsdvb_debugfs *debug_data = file->private_data;
+	int rc;
+
+	kref_get(&debug_data->refcount);
+
+	poll_wait(file, &debug_data->stats_queue, wait);
+
+	rc = smsdvb_stats_wait_read(debug_data);
+	kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
+
+	return rc > 0 ? EPOLLIN | EPOLLRDNORM : 0;
+}
+
+static ssize_t smsdvb_stats_read(struct file *file, char __user *user_buf,
+				      size_t nbytes, loff_t *ppos)
+{
+	int rc = 0, len;
+	struct smsdvb_debugfs *debug_data = file->private_data;
+
+	kref_get(&debug_data->refcount);
+
+	if (file->f_flags & O_NONBLOCK) {
+		rc = smsdvb_stats_wait_read(debug_data);
+		if (!rc) {
+			rc = -EWOULDBLOCK;
+			goto ret;
+		}
+	} else {
+		rc = wait_event_interruptible(debug_data->stats_queue,
+				      smsdvb_stats_wait_read(debug_data));
+		if (rc < 0)
+			goto ret;
+	}
+
+	if (debug_data->stats_was_read) {
+		rc = 0;	/* EOF */
+		goto ret;
+	}
+
+	len = debug_data->stats_count - *ppos;
+	if (len >= 0)
+		rc = simple_read_from_buffer(user_buf, nbytes, ppos,
+					     debug_data->stats_data, len);
+	else
+		rc = 0;
+
+	if (*ppos >= debug_data->stats_count) {
+		spin_lock(&debug_data->lock);
+		debug_data->stats_was_read = true;
+		spin_unlock(&debug_data->lock);
+	}
+ret:
+	kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
+	return rc;
+}
+
+static int smsdvb_stats_release(struct inode *inode, struct file *file)
+{
+	struct smsdvb_debugfs *debug_data = file->private_data;
+
+	spin_lock(&debug_data->lock);
+	debug_data->stats_was_read = true;	/* return EOF to read() */
+	spin_unlock(&debug_data->lock);
+	wake_up_interruptible_sync(&debug_data->stats_queue);
+
+	kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
+	file->private_data = NULL;
+
+	return 0;
+}
+
+static const struct file_operations debugfs_stats_ops = {
+	.open = smsdvb_stats_open,
+	.poll = smsdvb_stats_poll,
+	.read = smsdvb_stats_read,
+	.release = smsdvb_stats_release,
+	.llseek = generic_file_llseek,
+};
+
+/*
+ * Functions used by smsdvb, in order to create the interfaces
+ */
+
+int smsdvb_debugfs_create(struct smsdvb_client_t *client)
+{
+	struct smscore_device_t *coredev = client->coredev;
+	struct dentry *d;
+	struct smsdvb_debugfs *debug_data;
+
+	if (!smsdvb_debugfs_usb_root || !coredev->is_usb_device)
+		return -ENODEV;
+
+	client->debugfs = debugfs_create_dir(coredev->devpath,
+					     smsdvb_debugfs_usb_root);
+	if (IS_ERR_OR_NULL(client->debugfs)) {
+		pr_info("Unable to create debugfs %s directory.\n",
+			coredev->devpath);
+		return -ENODEV;
+	}
+
+	d = debugfs_create_file("stats", S_IRUGO | S_IWUSR, client->debugfs,
+				client, &debugfs_stats_ops);
+	if (!d) {
+		debugfs_remove(client->debugfs);
+		return -ENOMEM;
+	}
+
+	debug_data = kzalloc(sizeof(*client->debug_data), GFP_KERNEL);
+	if (!debug_data)
+		return -ENOMEM;
+
+	client->debug_data        = debug_data;
+	client->prt_dvb_stats     = smsdvb_print_dvb_stats;
+	client->prt_isdb_stats    = smsdvb_print_isdb_stats;
+	client->prt_isdb_stats_ex = smsdvb_print_isdb_stats_ex;
+
+	init_waitqueue_head(&debug_data->stats_queue);
+	spin_lock_init(&debug_data->lock);
+	kref_init(&debug_data->refcount);
+
+	return 0;
+}
+
+void smsdvb_debugfs_release(struct smsdvb_client_t *client)
+{
+	if (!client->debugfs)
+		return;
+
+	client->prt_dvb_stats     = NULL;
+	client->prt_isdb_stats    = NULL;
+	client->prt_isdb_stats_ex = NULL;
+
+	debugfs_remove_recursive(client->debugfs);
+	kref_put(&client->debug_data->refcount, smsdvb_debugfs_data_release);
+
+	client->debug_data = NULL;
+	client->debugfs = NULL;
+}
+
+void smsdvb_debugfs_register(void)
+{
+	struct dentry *d;
+
+	/*
+	 * FIXME: This was written to debug Siano USB devices. So, it creates
+	 * the debugfs node under <debugfs>/usb.
+	 * A similar logic would be needed for Siano sdio devices, but, in that
+	 * case, usb_debug_root is not a good choice.
+	 *
+	 * Perhaps the right fix here would be to create another sysfs root
+	 * node for sdio-based boards, but this may need some logic at sdio
+	 * subsystem.
+	 */
+	d = debugfs_create_dir("smsdvb", usb_debug_root);
+	if (IS_ERR_OR_NULL(d)) {
+		pr_err("Couldn't create sysfs node for smsdvb\n");
+		return;
+	}
+	smsdvb_debugfs_usb_root = d;
+}
+
+void smsdvb_debugfs_unregister(void)
+{
+	if (!smsdvb_debugfs_usb_root)
+		return;
+	debugfs_remove_recursive(smsdvb_debugfs_usb_root);
+	smsdvb_debugfs_usb_root = NULL;
+}