From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- drivers/net/wireless/ath/ath10k/spectral.c | 560 +++++++++++++++++++++++++++++ 1 file changed, 560 insertions(+) create mode 100644 drivers/net/wireless/ath/ath10k/spectral.c (limited to 'drivers/net/wireless/ath/ath10k/spectral.c') diff --git a/drivers/net/wireless/ath/ath10k/spectral.c b/drivers/net/wireless/ath/ath10k/spectral.c new file mode 100644 index 000000000..68254a967 --- /dev/null +++ b/drivers/net/wireless/ath/ath10k/spectral.c @@ -0,0 +1,560 @@ +// SPDX-License-Identifier: ISC +/* + * Copyright (c) 2013-2017 Qualcomm Atheros, Inc. + */ + +#include +#include "core.h" +#include "debug.h" +#include "wmi-ops.h" + +static void send_fft_sample(struct ath10k *ar, + const struct fft_sample_tlv *fft_sample_tlv) +{ + int length; + + if (!ar->spectral.rfs_chan_spec_scan) + return; + + length = __be16_to_cpu(fft_sample_tlv->length) + + sizeof(*fft_sample_tlv); + relay_write(ar->spectral.rfs_chan_spec_scan, fft_sample_tlv, length); +} + +static uint8_t get_max_exp(s8 max_index, u16 max_magnitude, size_t bin_len, + u8 *data) +{ + int dc_pos; + u8 max_exp; + + dc_pos = bin_len / 2; + + /* peak index outside of bins */ + if (dc_pos < max_index || -dc_pos >= max_index) + return 0; + + for (max_exp = 0; max_exp < 8; max_exp++) { + if (data[dc_pos + max_index] == (max_magnitude >> max_exp)) + break; + } + + /* max_exp not found */ + if (data[dc_pos + max_index] != (max_magnitude >> max_exp)) + return 0; + + return max_exp; +} + +static inline size_t ath10k_spectral_fix_bin_size(struct ath10k *ar, + size_t bin_len) +{ + /* some chipsets reports bin size as 2^n bytes + 'm' bytes in + * report mode 2. First 2^n bytes carries inband tones and last + * 'm' bytes carries band edge detection data mainly used in + * radar detection purpose. Strip last 'm' bytes to make bin size + * as a valid one. 'm' can take possible values of 4, 12. + */ + if (!is_power_of_2(bin_len)) + bin_len -= ar->hw_params.spectral_bin_discard; + + return bin_len; +} + +int ath10k_spectral_process_fft(struct ath10k *ar, + struct wmi_phyerr_ev_arg *phyerr, + const struct phyerr_fft_report *fftr, + size_t bin_len, u64 tsf) +{ + struct fft_sample_ath10k *fft_sample; + u8 buf[sizeof(*fft_sample) + SPECTRAL_ATH10K_MAX_NUM_BINS]; + u16 freq1, freq2, total_gain_db, base_pwr_db, length, peak_mag; + u32 reg0, reg1; + u8 chain_idx, *bins; + int dc_pos; + + fft_sample = (struct fft_sample_ath10k *)&buf; + + bin_len = ath10k_spectral_fix_bin_size(ar, bin_len); + + if (bin_len < 64 || bin_len > SPECTRAL_ATH10K_MAX_NUM_BINS) + return -EINVAL; + + reg0 = __le32_to_cpu(fftr->reg0); + reg1 = __le32_to_cpu(fftr->reg1); + + length = sizeof(*fft_sample) - sizeof(struct fft_sample_tlv) + bin_len; + fft_sample->tlv.type = ATH_FFT_SAMPLE_ATH10K; + fft_sample->tlv.length = __cpu_to_be16(length); + + /* TODO: there might be a reason why the hardware reports 20/40/80 MHz, + * but the results/plots suggest that its actually 22/44/88 MHz. + */ + switch (phyerr->chan_width_mhz) { + case 20: + fft_sample->chan_width_mhz = 22; + break; + case 40: + fft_sample->chan_width_mhz = 44; + break; + case 80: + /* TODO: As experiments with an analogue sender and various + * configurations (fft-sizes of 64/128/256 and 20/40/80 Mhz) + * show, the particular configuration of 80 MHz/64 bins does + * not match with the other samples at all. Until the reason + * for that is found, don't report these samples. + */ + if (bin_len == 64) + return -EINVAL; + fft_sample->chan_width_mhz = 88; + break; + default: + fft_sample->chan_width_mhz = phyerr->chan_width_mhz; + } + + fft_sample->relpwr_db = MS(reg1, SEARCH_FFT_REPORT_REG1_RELPWR_DB); + fft_sample->avgpwr_db = MS(reg1, SEARCH_FFT_REPORT_REG1_AVGPWR_DB); + + peak_mag = MS(reg1, SEARCH_FFT_REPORT_REG1_PEAK_MAG); + fft_sample->max_magnitude = __cpu_to_be16(peak_mag); + fft_sample->max_index = MS(reg0, SEARCH_FFT_REPORT_REG0_PEAK_SIDX); + fft_sample->rssi = phyerr->rssi_combined; + + total_gain_db = MS(reg0, SEARCH_FFT_REPORT_REG0_TOTAL_GAIN_DB); + base_pwr_db = MS(reg0, SEARCH_FFT_REPORT_REG0_BASE_PWR_DB); + fft_sample->total_gain_db = __cpu_to_be16(total_gain_db); + fft_sample->base_pwr_db = __cpu_to_be16(base_pwr_db); + + freq1 = phyerr->freq1; + freq2 = phyerr->freq2; + fft_sample->freq1 = __cpu_to_be16(freq1); + fft_sample->freq2 = __cpu_to_be16(freq2); + + chain_idx = MS(reg0, SEARCH_FFT_REPORT_REG0_FFT_CHN_IDX); + + fft_sample->noise = __cpu_to_be16(phyerr->nf_chains[chain_idx]); + + bins = (u8 *)fftr; + bins += sizeof(*fftr) + ar->hw_params.spectral_bin_offset; + + fft_sample->tsf = __cpu_to_be64(tsf); + + /* max_exp has been directly reported by previous hardware (ath9k), + * maybe its possible to get it by other means? + */ + fft_sample->max_exp = get_max_exp(fft_sample->max_index, peak_mag, + bin_len, bins); + + memcpy(fft_sample->data, bins, bin_len); + + /* DC value (value in the middle) is the blind spot of the spectral + * sample and invalid, interpolate it. + */ + dc_pos = bin_len / 2; + fft_sample->data[dc_pos] = (fft_sample->data[dc_pos + 1] + + fft_sample->data[dc_pos - 1]) / 2; + + send_fft_sample(ar, &fft_sample->tlv); + + return 0; +} + +static struct ath10k_vif *ath10k_get_spectral_vdev(struct ath10k *ar) +{ + struct ath10k_vif *arvif; + + lockdep_assert_held(&ar->conf_mutex); + + if (list_empty(&ar->arvifs)) + return NULL; + + /* if there already is a vif doing spectral, return that. */ + list_for_each_entry(arvif, &ar->arvifs, list) + if (arvif->spectral_enabled) + return arvif; + + /* otherwise, return the first vif. */ + return list_first_entry(&ar->arvifs, typeof(*arvif), list); +} + +static int ath10k_spectral_scan_trigger(struct ath10k *ar) +{ + struct ath10k_vif *arvif; + int res; + int vdev_id; + + lockdep_assert_held(&ar->conf_mutex); + + arvif = ath10k_get_spectral_vdev(ar); + if (!arvif) + return -ENODEV; + vdev_id = arvif->vdev_id; + + if (ar->spectral.mode == SPECTRAL_DISABLED) + return 0; + + res = ath10k_wmi_vdev_spectral_enable(ar, vdev_id, + WMI_SPECTRAL_TRIGGER_CMD_CLEAR, + WMI_SPECTRAL_ENABLE_CMD_ENABLE); + if (res < 0) + return res; + + res = ath10k_wmi_vdev_spectral_enable(ar, vdev_id, + WMI_SPECTRAL_TRIGGER_CMD_TRIGGER, + WMI_SPECTRAL_ENABLE_CMD_ENABLE); + if (res < 0) + return res; + + return 0; +} + +static int ath10k_spectral_scan_config(struct ath10k *ar, + enum ath10k_spectral_mode mode) +{ + struct wmi_vdev_spectral_conf_arg arg; + struct ath10k_vif *arvif; + int vdev_id, count, res = 0; + + lockdep_assert_held(&ar->conf_mutex); + + arvif = ath10k_get_spectral_vdev(ar); + if (!arvif) + return -ENODEV; + + vdev_id = arvif->vdev_id; + + arvif->spectral_enabled = (mode != SPECTRAL_DISABLED); + ar->spectral.mode = mode; + + res = ath10k_wmi_vdev_spectral_enable(ar, vdev_id, + WMI_SPECTRAL_TRIGGER_CMD_CLEAR, + WMI_SPECTRAL_ENABLE_CMD_DISABLE); + if (res < 0) { + ath10k_warn(ar, "failed to enable spectral scan: %d\n", res); + return res; + } + + if (mode == SPECTRAL_DISABLED) + return 0; + + if (mode == SPECTRAL_BACKGROUND) + count = WMI_SPECTRAL_COUNT_DEFAULT; + else + count = max_t(u8, 1, ar->spectral.config.count); + + arg.vdev_id = vdev_id; + arg.scan_count = count; + arg.scan_period = WMI_SPECTRAL_PERIOD_DEFAULT; + arg.scan_priority = WMI_SPECTRAL_PRIORITY_DEFAULT; + arg.scan_fft_size = ar->spectral.config.fft_size; + arg.scan_gc_ena = WMI_SPECTRAL_GC_ENA_DEFAULT; + arg.scan_restart_ena = WMI_SPECTRAL_RESTART_ENA_DEFAULT; + arg.scan_noise_floor_ref = WMI_SPECTRAL_NOISE_FLOOR_REF_DEFAULT; + arg.scan_init_delay = WMI_SPECTRAL_INIT_DELAY_DEFAULT; + arg.scan_nb_tone_thr = WMI_SPECTRAL_NB_TONE_THR_DEFAULT; + arg.scan_str_bin_thr = WMI_SPECTRAL_STR_BIN_THR_DEFAULT; + arg.scan_wb_rpt_mode = WMI_SPECTRAL_WB_RPT_MODE_DEFAULT; + arg.scan_rssi_rpt_mode = WMI_SPECTRAL_RSSI_RPT_MODE_DEFAULT; + arg.scan_rssi_thr = WMI_SPECTRAL_RSSI_THR_DEFAULT; + arg.scan_pwr_format = WMI_SPECTRAL_PWR_FORMAT_DEFAULT; + arg.scan_rpt_mode = WMI_SPECTRAL_RPT_MODE_DEFAULT; + arg.scan_bin_scale = WMI_SPECTRAL_BIN_SCALE_DEFAULT; + arg.scan_dbm_adj = WMI_SPECTRAL_DBM_ADJ_DEFAULT; + arg.scan_chn_mask = WMI_SPECTRAL_CHN_MASK_DEFAULT; + + res = ath10k_wmi_vdev_spectral_conf(ar, &arg); + if (res < 0) { + ath10k_warn(ar, "failed to configure spectral scan: %d\n", res); + return res; + } + + return 0; +} + +static ssize_t read_file_spec_scan_ctl(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ath10k *ar = file->private_data; + char *mode = ""; + size_t len; + enum ath10k_spectral_mode spectral_mode; + + mutex_lock(&ar->conf_mutex); + spectral_mode = ar->spectral.mode; + mutex_unlock(&ar->conf_mutex); + + switch (spectral_mode) { + case SPECTRAL_DISABLED: + mode = "disable"; + break; + case SPECTRAL_BACKGROUND: + mode = "background"; + break; + case SPECTRAL_MANUAL: + mode = "manual"; + break; + } + + len = strlen(mode); + return simple_read_from_buffer(user_buf, count, ppos, mode, len); +} + +static ssize_t write_file_spec_scan_ctl(struct file *file, + const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ath10k *ar = file->private_data; + char buf[32]; + ssize_t len; + int res; + + len = min(count, sizeof(buf) - 1); + if (copy_from_user(buf, user_buf, len)) + return -EFAULT; + + buf[len] = '\0'; + + mutex_lock(&ar->conf_mutex); + + if (strncmp("trigger", buf, 7) == 0) { + if (ar->spectral.mode == SPECTRAL_MANUAL || + ar->spectral.mode == SPECTRAL_BACKGROUND) { + /* reset the configuration to adopt possibly changed + * debugfs parameters + */ + res = ath10k_spectral_scan_config(ar, + ar->spectral.mode); + if (res < 0) { + ath10k_warn(ar, "failed to reconfigure spectral scan: %d\n", + res); + } + res = ath10k_spectral_scan_trigger(ar); + if (res < 0) { + ath10k_warn(ar, "failed to trigger spectral scan: %d\n", + res); + } + } else { + res = -EINVAL; + } + } else if (strncmp("background", buf, 10) == 0) { + res = ath10k_spectral_scan_config(ar, SPECTRAL_BACKGROUND); + } else if (strncmp("manual", buf, 6) == 0) { + res = ath10k_spectral_scan_config(ar, SPECTRAL_MANUAL); + } else if (strncmp("disable", buf, 7) == 0) { + res = ath10k_spectral_scan_config(ar, SPECTRAL_DISABLED); + } else { + res = -EINVAL; + } + + mutex_unlock(&ar->conf_mutex); + + if (res < 0) + return res; + + return count; +} + +static const struct file_operations fops_spec_scan_ctl = { + .read = read_file_spec_scan_ctl, + .write = write_file_spec_scan_ctl, + .open = simple_open, + .owner = THIS_MODULE, + .llseek = default_llseek, +}; + +static ssize_t read_file_spectral_count(struct file *file, + char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ath10k *ar = file->private_data; + char buf[32]; + size_t len; + u8 spectral_count; + + mutex_lock(&ar->conf_mutex); + spectral_count = ar->spectral.config.count; + mutex_unlock(&ar->conf_mutex); + + len = sprintf(buf, "%d\n", spectral_count); + return simple_read_from_buffer(user_buf, count, ppos, buf, len); +} + +static ssize_t write_file_spectral_count(struct file *file, + const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ath10k *ar = file->private_data; + unsigned long val; + char buf[32]; + ssize_t len; + + len = min(count, sizeof(buf) - 1); + if (copy_from_user(buf, user_buf, len)) + return -EFAULT; + + buf[len] = '\0'; + if (kstrtoul(buf, 0, &val)) + return -EINVAL; + + if (val > 255) + return -EINVAL; + + mutex_lock(&ar->conf_mutex); + ar->spectral.config.count = val; + mutex_unlock(&ar->conf_mutex); + + return count; +} + +static const struct file_operations fops_spectral_count = { + .read = read_file_spectral_count, + .write = write_file_spectral_count, + .open = simple_open, + .owner = THIS_MODULE, + .llseek = default_llseek, +}; + +static ssize_t read_file_spectral_bins(struct file *file, + char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ath10k *ar = file->private_data; + char buf[32]; + unsigned int bins, fft_size, bin_scale; + size_t len; + + mutex_lock(&ar->conf_mutex); + + fft_size = ar->spectral.config.fft_size; + bin_scale = WMI_SPECTRAL_BIN_SCALE_DEFAULT; + bins = 1 << (fft_size - bin_scale); + + mutex_unlock(&ar->conf_mutex); + + len = sprintf(buf, "%d\n", bins); + return simple_read_from_buffer(user_buf, count, ppos, buf, len); +} + +static ssize_t write_file_spectral_bins(struct file *file, + const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct ath10k *ar = file->private_data; + unsigned long val; + char buf[32]; + ssize_t len; + + len = min(count, sizeof(buf) - 1); + if (copy_from_user(buf, user_buf, len)) + return -EFAULT; + + buf[len] = '\0'; + if (kstrtoul(buf, 0, &val)) + return -EINVAL; + + if (val < 64 || val > SPECTRAL_ATH10K_MAX_NUM_BINS) + return -EINVAL; + + if (!is_power_of_2(val)) + return -EINVAL; + + mutex_lock(&ar->conf_mutex); + ar->spectral.config.fft_size = ilog2(val); + ar->spectral.config.fft_size += WMI_SPECTRAL_BIN_SCALE_DEFAULT; + mutex_unlock(&ar->conf_mutex); + + return count; +} + +static const struct file_operations fops_spectral_bins = { + .read = read_file_spectral_bins, + .write = write_file_spectral_bins, + .open = simple_open, + .owner = THIS_MODULE, + .llseek = default_llseek, +}; + +static struct dentry *create_buf_file_handler(const char *filename, + struct dentry *parent, + umode_t mode, + struct rchan_buf *buf, + int *is_global) +{ + struct dentry *buf_file; + + buf_file = debugfs_create_file(filename, mode, parent, buf, + &relay_file_operations); + if (IS_ERR(buf_file)) + return NULL; + + *is_global = 1; + return buf_file; +} + +static int remove_buf_file_handler(struct dentry *dentry) +{ + debugfs_remove(dentry); + + return 0; +} + +static const struct rchan_callbacks rfs_spec_scan_cb = { + .create_buf_file = create_buf_file_handler, + .remove_buf_file = remove_buf_file_handler, +}; + +int ath10k_spectral_start(struct ath10k *ar) +{ + struct ath10k_vif *arvif; + + lockdep_assert_held(&ar->conf_mutex); + + list_for_each_entry(arvif, &ar->arvifs, list) + arvif->spectral_enabled = 0; + + ar->spectral.mode = SPECTRAL_DISABLED; + ar->spectral.config.count = WMI_SPECTRAL_COUNT_DEFAULT; + ar->spectral.config.fft_size = WMI_SPECTRAL_FFT_SIZE_DEFAULT; + + return 0; +} + +int ath10k_spectral_vif_stop(struct ath10k_vif *arvif) +{ + if (!arvif->spectral_enabled) + return 0; + + return ath10k_spectral_scan_config(arvif->ar, SPECTRAL_DISABLED); +} + +int ath10k_spectral_create(struct ath10k *ar) +{ + /* The buffer size covers whole channels in dual bands up to 128 bins. + * Scan with bigger than 128 bins needs to be run on single band each. + */ + ar->spectral.rfs_chan_spec_scan = relay_open("spectral_scan", + ar->debug.debugfs_phy, + 1140, 2500, + &rfs_spec_scan_cb, NULL); + debugfs_create_file("spectral_scan_ctl", + 0600, + ar->debug.debugfs_phy, ar, + &fops_spec_scan_ctl); + debugfs_create_file("spectral_count", + 0600, + ar->debug.debugfs_phy, ar, + &fops_spectral_count); + debugfs_create_file("spectral_bins", + 0600, + ar->debug.debugfs_phy, ar, + &fops_spectral_bins); + + return 0; +} + +void ath10k_spectral_destroy(struct ath10k *ar) +{ + if (ar->spectral.rfs_chan_spec_scan) { + relay_close(ar->spectral.rfs_chan_spec_scan); + ar->spectral.rfs_chan_spec_scan = NULL; + } +} -- cgit v1.2.3