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/ath9k/link.c | 544 ++++++++++++++++++++++++++++++++++ 1 file changed, 544 insertions(+) create mode 100644 drivers/net/wireless/ath/ath9k/link.c (limited to 'drivers/net/wireless/ath/ath9k/link.c') diff --git a/drivers/net/wireless/ath/ath9k/link.c b/drivers/net/wireless/ath/ath9k/link.c new file mode 100644 index 000000000..9d84003db --- /dev/null +++ b/drivers/net/wireless/ath/ath9k/link.c @@ -0,0 +1,544 @@ +/* + * Copyright (c) 2012 Qualcomm Atheros, Inc. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include "ath9k.h" + +/* + * TX polling - checks if the TX engine is stuck somewhere + * and issues a chip reset if so. + */ +static bool ath_tx_complete_check(struct ath_softc *sc) +{ + struct ath_txq *txq; + int i; + + if (sc->tx99_state) + return true; + + for (i = 0; i < IEEE80211_NUM_ACS; i++) { + txq = sc->tx.txq_map[i]; + + ath_txq_lock(sc, txq); + if (txq->axq_depth) { + if (txq->axq_tx_inprogress) { + ath_txq_unlock(sc, txq); + goto reset; + } + + txq->axq_tx_inprogress = true; + } + ath_txq_unlock(sc, txq); + } + + return true; + +reset: + ath_dbg(ath9k_hw_common(sc->sc_ah), RESET, + "tx hung, resetting the chip\n"); + ath9k_queue_reset(sc, RESET_TYPE_TX_HANG); + return false; + +} + +void ath_hw_check_work(struct work_struct *work) +{ + struct ath_softc *sc = container_of(work, struct ath_softc, + hw_check_work.work); + + if (!ath_hw_check(sc) || + !ath_tx_complete_check(sc)) + return; + + ieee80211_queue_delayed_work(sc->hw, &sc->hw_check_work, + msecs_to_jiffies(ATH_HW_CHECK_POLL_INT)); +} + +/* + * Checks if the BB/MAC is hung. + */ +bool ath_hw_check(struct ath_softc *sc) +{ + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + enum ath_reset_type type; + bool is_alive; + + ath9k_ps_wakeup(sc); + + is_alive = ath9k_hw_check_alive(sc->sc_ah); + + if (!is_alive) { + ath_dbg(common, RESET, + "HW hang detected, schedule chip reset\n"); + type = RESET_TYPE_MAC_HANG; + ath9k_queue_reset(sc, type); + } + + ath9k_ps_restore(sc); + + return is_alive; +} + +/* + * PLL-WAR for AR9485/AR9340 + */ +static bool ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum) +{ + static int count; + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + + if (pll_sqsum >= 0x40000) { + count++; + if (count == 3) { + ath_dbg(common, RESET, "PLL WAR, resetting the chip\n"); + ath9k_queue_reset(sc, RESET_TYPE_PLL_HANG); + count = 0; + return true; + } + } else { + count = 0; + } + + return false; +} + +void ath_hw_pll_work(struct work_struct *work) +{ + u32 pll_sqsum; + struct ath_softc *sc = container_of(work, struct ath_softc, + hw_pll_work.work); + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + /* + * ensure that the PLL WAR is executed only + * after the STA is associated (or) if the + * beaconing had started in interfaces that + * uses beacons. + */ + if (!test_bit(ATH_OP_BEACONS, &common->op_flags)) + return; + + if (sc->tx99_state) + return; + + ath9k_ps_wakeup(sc); + pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah); + ath9k_ps_restore(sc); + if (ath_hw_pll_rx_hang_check(sc, pll_sqsum)) + return; + + ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, + msecs_to_jiffies(ATH_PLL_WORK_INTERVAL)); +} + +/* + * PA Pre-distortion. + */ +static void ath_paprd_activate(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + struct ath9k_hw_cal_data *caldata = ah->caldata; + int chain; + + if (!caldata || !test_bit(PAPRD_DONE, &caldata->cal_flags)) { + ath_dbg(common, CALIBRATE, "Failed to activate PAPRD\n"); + return; + } + + ar9003_paprd_enable(ah, false); + for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) { + if (!(ah->txchainmask & BIT(chain))) + continue; + + ar9003_paprd_populate_single_table(ah, caldata, chain); + } + + ath_dbg(common, CALIBRATE, "Activating PAPRD\n"); + ar9003_paprd_enable(ah, true); +} + +static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain) +{ + struct ieee80211_hw *hw = sc->hw; + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + struct ath_tx_control txctl; + unsigned long time_left; + + memset(&txctl, 0, sizeof(txctl)); + txctl.txq = sc->tx.txq_map[IEEE80211_AC_BE]; + + memset(tx_info, 0, sizeof(*tx_info)); + tx_info->band = sc->cur_chandef.chan->band; + tx_info->flags |= IEEE80211_TX_CTL_NO_ACK; + tx_info->control.rates[0].idx = 0; + tx_info->control.rates[0].count = 1; + tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS; + tx_info->control.rates[1].idx = -1; + + init_completion(&sc->paprd_complete); + txctl.paprd = BIT(chain); + + if (ath_tx_start(hw, skb, &txctl) != 0) { + ath_dbg(common, CALIBRATE, "PAPRD TX failed\n"); + dev_kfree_skb_any(skb); + return false; + } + + time_left = wait_for_completion_timeout(&sc->paprd_complete, + msecs_to_jiffies(ATH_PAPRD_TIMEOUT)); + + if (!time_left) + ath_dbg(common, CALIBRATE, + "Timeout waiting for paprd training on TX chain %d\n", + chain); + + return !!time_left; +} + +void ath_paprd_calibrate(struct work_struct *work) +{ + struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work); + struct ieee80211_hw *hw = sc->hw; + struct ath_hw *ah = sc->sc_ah; + struct ieee80211_hdr *hdr; + struct sk_buff *skb = NULL; + struct ath9k_hw_cal_data *caldata = ah->caldata; + struct ath_common *common = ath9k_hw_common(ah); + int ftype; + int chain_ok = 0; + int chain; + int len = 1800; + int ret; + + if (!caldata || + !test_bit(PAPRD_PACKET_SENT, &caldata->cal_flags) || + test_bit(PAPRD_DONE, &caldata->cal_flags)) { + ath_dbg(common, CALIBRATE, "Skipping PAPRD calibration\n"); + return; + } + + ath9k_ps_wakeup(sc); + + if (ar9003_paprd_init_table(ah) < 0) + goto fail_paprd; + + skb = alloc_skb(len, GFP_KERNEL); + if (!skb) + goto fail_paprd; + + skb_put(skb, len); + memset(skb->data, 0, len); + hdr = (struct ieee80211_hdr *)skb->data; + ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC; + hdr->frame_control = cpu_to_le16(ftype); + hdr->duration_id = cpu_to_le16(10); + memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN); + memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN); + memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN); + + for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) { + if (!(ah->txchainmask & BIT(chain))) + continue; + + chain_ok = 0; + ar9003_paprd_setup_gain_table(ah, chain); + + ath_dbg(common, CALIBRATE, + "Sending PAPRD training frame on chain %d\n", chain); + if (!ath_paprd_send_frame(sc, skb, chain)) + goto fail_paprd; + + if (!ar9003_paprd_is_done(ah)) { + ath_dbg(common, CALIBRATE, + "PAPRD not yet done on chain %d\n", chain); + break; + } + + ret = ar9003_paprd_create_curve(ah, caldata, chain); + if (ret == -EINPROGRESS) { + ath_dbg(common, CALIBRATE, + "PAPRD curve on chain %d needs to be re-trained\n", + chain); + break; + } else if (ret) { + ath_dbg(common, CALIBRATE, + "PAPRD create curve failed on chain %d\n", + chain); + break; + } + + chain_ok = 1; + } + kfree_skb(skb); + + if (chain_ok) { + set_bit(PAPRD_DONE, &caldata->cal_flags); + ath_paprd_activate(sc); + } + +fail_paprd: + ath9k_ps_restore(sc); +} + +/* + * ANI performs periodic noise floor calibration + * that is used to adjust and optimize the chip performance. This + * takes environmental changes (location, temperature) into account. + * When the task is complete, it reschedules itself depending on the + * appropriate interval that was calculated. + */ +void ath_ani_calibrate(struct timer_list *t) +{ + struct ath_common *common = from_timer(common, t, ani.timer); + struct ath_softc *sc = (struct ath_softc *)common->priv; + struct ath_hw *ah = sc->sc_ah; + bool longcal = false; + bool shortcal = false; + bool aniflag = false; + unsigned int timestamp = jiffies_to_msecs(jiffies); + u32 cal_interval, short_cal_interval, long_cal_interval; + unsigned long flags; + + if (ah->caldata && test_bit(NFCAL_INTF, &ah->caldata->cal_flags)) + long_cal_interval = ATH_LONG_CALINTERVAL_INT; + else + long_cal_interval = ATH_LONG_CALINTERVAL; + + short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ? + ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL; + + /* Only calibrate if awake */ + if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE) { + if (++ah->ani_skip_count >= ATH_ANI_MAX_SKIP_COUNT) { + spin_lock_irqsave(&sc->sc_pm_lock, flags); + sc->ps_flags |= PS_WAIT_FOR_ANI; + spin_unlock_irqrestore(&sc->sc_pm_lock, flags); + } + goto set_timer; + } + ah->ani_skip_count = 0; + spin_lock_irqsave(&sc->sc_pm_lock, flags); + sc->ps_flags &= ~PS_WAIT_FOR_ANI; + spin_unlock_irqrestore(&sc->sc_pm_lock, flags); + + ath9k_ps_wakeup(sc); + + /* Long calibration runs independently of short calibration. */ + if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) { + longcal = true; + common->ani.longcal_timer = timestamp; + } + + /* Short calibration applies only while caldone is false */ + if (!common->ani.caldone) { + if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) { + shortcal = true; + common->ani.shortcal_timer = timestamp; + common->ani.resetcal_timer = timestamp; + } + } else { + if ((timestamp - common->ani.resetcal_timer) >= + ATH_RESTART_CALINTERVAL) { + common->ani.caldone = ath9k_hw_reset_calvalid(ah); + if (common->ani.caldone) + common->ani.resetcal_timer = timestamp; + } + } + + /* Verify whether we must check ANI */ + if ((timestamp - common->ani.checkani_timer) >= ah->config.ani_poll_interval) { + aniflag = true; + common->ani.checkani_timer = timestamp; + } + + /* Call ANI routine if necessary */ + if (aniflag) { + spin_lock_irqsave(&common->cc_lock, flags); + ath9k_hw_ani_monitor(ah, ah->curchan); + ath_update_survey_stats(sc); + spin_unlock_irqrestore(&common->cc_lock, flags); + } + + /* Perform calibration if necessary */ + if (longcal || shortcal) { + int ret = ath9k_hw_calibrate(ah, ah->curchan, ah->rxchainmask, + longcal); + if (ret < 0) { + common->ani.caldone = 0; + ath9k_queue_reset(sc, RESET_TYPE_CALIBRATION); + return; + } + + common->ani.caldone = ret; + } + + ath_dbg(common, ANI, + "Calibration @%lu finished: %s %s %s, caldone: %s\n", + jiffies, + longcal ? "long" : "", shortcal ? "short" : "", + aniflag ? "ani" : "", common->ani.caldone ? "true" : "false"); + + ath9k_ps_restore(sc); + +set_timer: + /* + * Set timer interval based on previous results. + * The interval must be the shortest necessary to satisfy ANI, + * short calibration and long calibration. + */ + cal_interval = ATH_LONG_CALINTERVAL; + cal_interval = min(cal_interval, (u32)ah->config.ani_poll_interval); + if (!common->ani.caldone) + cal_interval = min(cal_interval, (u32)short_cal_interval); + + mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval)); + + if (ar9003_is_paprd_enabled(ah) && ah->caldata) { + if (!test_bit(PAPRD_DONE, &ah->caldata->cal_flags)) { + ieee80211_queue_work(sc->hw, &sc->paprd_work); + } else if (!ah->paprd_table_write_done) { + ath9k_ps_wakeup(sc); + ath_paprd_activate(sc); + ath9k_ps_restore(sc); + } + } +} + +void ath_start_ani(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + unsigned long timestamp = jiffies_to_msecs(jiffies); + + if (common->disable_ani || + !test_bit(ATH_OP_ANI_RUN, &common->op_flags) || + sc->cur_chan->offchannel) + return; + + common->ani.longcal_timer = timestamp; + common->ani.shortcal_timer = timestamp; + common->ani.checkani_timer = timestamp; + + ath_dbg(common, ANI, "Starting ANI\n"); + mod_timer(&common->ani.timer, + jiffies + msecs_to_jiffies((u32)ah->config.ani_poll_interval)); +} + +void ath_stop_ani(struct ath_softc *sc) +{ + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + + ath_dbg(common, ANI, "Stopping ANI\n"); + del_timer_sync(&common->ani.timer); +} + +void ath_check_ani(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + struct ath_beacon_config *cur_conf = &sc->cur_chan->beacon; + + /* + * Check for the various conditions in which ANI has to + * be stopped. + */ + if (ah->opmode == NL80211_IFTYPE_ADHOC) { + if (!cur_conf->enable_beacon) + goto stop_ani; + } else if (ah->opmode == NL80211_IFTYPE_AP) { + if (!cur_conf->enable_beacon) { + /* + * Disable ANI only when there are no + * associated stations. + */ + if (!test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags)) + goto stop_ani; + } + } else if (ah->opmode == NL80211_IFTYPE_STATION) { + if (!test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags)) + goto stop_ani; + } + + if (!test_bit(ATH_OP_ANI_RUN, &common->op_flags)) { + set_bit(ATH_OP_ANI_RUN, &common->op_flags); + ath_start_ani(sc); + } + + return; + +stop_ani: + clear_bit(ATH_OP_ANI_RUN, &common->op_flags); + ath_stop_ani(sc); +} + +void ath_update_survey_nf(struct ath_softc *sc, int channel) +{ + struct ath_hw *ah = sc->sc_ah; + struct ath9k_channel *chan = &ah->channels[channel]; + struct survey_info *survey = &sc->survey[channel]; + + if (chan->noisefloor) { + survey->filled |= SURVEY_INFO_NOISE_DBM; + survey->noise = ath9k_hw_getchan_noise(ah, chan, + chan->noisefloor); + } +} + +/* + * Updates the survey statistics and returns the busy time since last + * update in %, if the measurement duration was long enough for the + * result to be useful, -1 otherwise. + */ +int ath_update_survey_stats(struct ath_softc *sc) +{ + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + int pos = ah->curchan - &ah->channels[0]; + struct survey_info *survey = &sc->survey[pos]; + struct ath_cycle_counters *cc = &common->cc_survey; + unsigned int div = common->clockrate * 1000; + int ret = 0; + + if (!ah->curchan) + return -1; + + if (ah->power_mode == ATH9K_PM_AWAKE) + ath_hw_cycle_counters_update(common); + + if (cc->cycles > 0) { + survey->filled |= SURVEY_INFO_TIME | + SURVEY_INFO_TIME_BUSY | + SURVEY_INFO_TIME_RX | + SURVEY_INFO_TIME_TX; + survey->time += cc->cycles / div; + survey->time_busy += cc->rx_busy / div; + survey->time_rx += cc->rx_frame / div; + survey->time_tx += cc->tx_frame / div; + } + + if (cc->cycles < div) + return -1; + + if (cc->cycles > 0) + ret = cc->rx_busy * 100 / cc->cycles; + + memset(cc, 0, sizeof(*cc)); + + ath_update_survey_nf(sc, pos); + + return ret; +} -- cgit v1.2.3