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/intel/iwlwifi/dvm/tt.c | 668 ++++++++++++++++++++++++++++ 1 file changed, 668 insertions(+) create mode 100644 drivers/net/wireless/intel/iwlwifi/dvm/tt.c (limited to 'drivers/net/wireless/intel/iwlwifi/dvm/tt.c') diff --git a/drivers/net/wireless/intel/iwlwifi/dvm/tt.c b/drivers/net/wireless/intel/iwlwifi/dvm/tt.c new file mode 100644 index 000000000..43e8d04d5 --- /dev/null +++ b/drivers/net/wireless/intel/iwlwifi/dvm/tt.c @@ -0,0 +1,668 @@ +// SPDX-License-Identifier: GPL-2.0-only +/****************************************************************************** + * + * Copyright(c) 2007 - 2014 Intel Corporation. All rights reserved. + * Copyright (C) 2018, 2020 Intel Corporation + * + * Portions of this file are derived from the ipw3945 project, as well + * as portions of the ieee80211 subsystem header files. + *****************************************************************************/ + + +#include +#include +#include +#include +#include "iwl-io.h" +#include "iwl-modparams.h" +#include "iwl-debug.h" +#include "agn.h" +#include "dev.h" +#include "commands.h" +#include "tt.h" + +/* default Thermal Throttling transaction table + * Current state | Throttling Down | Throttling Up + *============================================================================= + * Condition Nxt State Condition Nxt State Condition Nxt State + *----------------------------------------------------------------------------- + * IWL_TI_0 T >= 114 CT_KILL 114>T>=105 TI_1 N/A N/A + * IWL_TI_1 T >= 114 CT_KILL 114>T>=110 TI_2 T<=95 TI_0 + * IWL_TI_2 T >= 114 CT_KILL T<=100 TI_1 + * IWL_CT_KILL N/A N/A N/A N/A T<=95 TI_0 + *============================================================================= + */ +static const struct iwl_tt_trans tt_range_0[IWL_TI_STATE_MAX - 1] = { + {IWL_TI_0, IWL_ABSOLUTE_ZERO, 104}, + {IWL_TI_1, 105, CT_KILL_THRESHOLD - 1}, + {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX} +}; +static const struct iwl_tt_trans tt_range_1[IWL_TI_STATE_MAX - 1] = { + {IWL_TI_0, IWL_ABSOLUTE_ZERO, 95}, + {IWL_TI_2, 110, CT_KILL_THRESHOLD - 1}, + {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX} +}; +static const struct iwl_tt_trans tt_range_2[IWL_TI_STATE_MAX - 1] = { + {IWL_TI_1, IWL_ABSOLUTE_ZERO, 100}, + {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX}, + {IWL_TI_CT_KILL, CT_KILL_THRESHOLD, IWL_ABSOLUTE_MAX} +}; +static const struct iwl_tt_trans tt_range_3[IWL_TI_STATE_MAX - 1] = { + {IWL_TI_0, IWL_ABSOLUTE_ZERO, CT_KILL_EXIT_THRESHOLD}, + {IWL_TI_CT_KILL, CT_KILL_EXIT_THRESHOLD + 1, IWL_ABSOLUTE_MAX}, + {IWL_TI_CT_KILL, CT_KILL_EXIT_THRESHOLD + 1, IWL_ABSOLUTE_MAX} +}; + +/* Advance Thermal Throttling default restriction table */ +static const struct iwl_tt_restriction restriction_range[IWL_TI_STATE_MAX] = { + {IWL_ANT_OK_MULTI, IWL_ANT_OK_MULTI, true }, + {IWL_ANT_OK_SINGLE, IWL_ANT_OK_MULTI, true }, + {IWL_ANT_OK_SINGLE, IWL_ANT_OK_SINGLE, false }, + {IWL_ANT_OK_NONE, IWL_ANT_OK_NONE, false } +}; + +bool iwl_tt_is_low_power_state(struct iwl_priv *priv) +{ + struct iwl_tt_mgmt *tt = &priv->thermal_throttle; + + if (tt->state >= IWL_TI_1) + return true; + return false; +} + +u8 iwl_tt_current_power_mode(struct iwl_priv *priv) +{ + struct iwl_tt_mgmt *tt = &priv->thermal_throttle; + + return tt->tt_power_mode; +} + +bool iwl_ht_enabled(struct iwl_priv *priv) +{ + struct iwl_tt_mgmt *tt = &priv->thermal_throttle; + struct iwl_tt_restriction *restriction; + + if (!priv->thermal_throttle.advanced_tt) + return true; + restriction = tt->restriction + tt->state; + return restriction->is_ht; +} + +static bool iwl_within_ct_kill_margin(struct iwl_priv *priv) +{ + s32 temp = priv->temperature; /* degrees CELSIUS except specified */ + bool within_margin = false; + + if (!priv->thermal_throttle.advanced_tt) + within_margin = ((temp + IWL_TT_CT_KILL_MARGIN) >= + CT_KILL_THRESHOLD_LEGACY) ? true : false; + else + within_margin = ((temp + IWL_TT_CT_KILL_MARGIN) >= + CT_KILL_THRESHOLD) ? true : false; + return within_margin; +} + +bool iwl_check_for_ct_kill(struct iwl_priv *priv) +{ + bool is_ct_kill = false; + + if (iwl_within_ct_kill_margin(priv)) { + iwl_tt_enter_ct_kill(priv); + is_ct_kill = true; + } + return is_ct_kill; +} + +enum iwl_antenna_ok iwl_tx_ant_restriction(struct iwl_priv *priv) +{ + struct iwl_tt_mgmt *tt = &priv->thermal_throttle; + struct iwl_tt_restriction *restriction; + + if (!priv->thermal_throttle.advanced_tt) + return IWL_ANT_OK_MULTI; + restriction = tt->restriction + tt->state; + return restriction->tx_stream; +} + +enum iwl_antenna_ok iwl_rx_ant_restriction(struct iwl_priv *priv) +{ + struct iwl_tt_mgmt *tt = &priv->thermal_throttle; + struct iwl_tt_restriction *restriction; + + if (!priv->thermal_throttle.advanced_tt) + return IWL_ANT_OK_MULTI; + restriction = tt->restriction + tt->state; + return restriction->rx_stream; +} + +#define CT_KILL_EXIT_DURATION (5) /* 5 seconds duration */ +#define CT_KILL_WAITING_DURATION (300) /* 300ms duration */ + +/* + * toggle the bit to wake up uCode and check the temperature + * if the temperature is below CT, uCode will stay awake and send card + * state notification with CT_KILL bit clear to inform Thermal Throttling + * Management to change state. Otherwise, uCode will go back to sleep + * without doing anything, driver should continue the 5 seconds timer + * to wake up uCode for temperature check until temperature drop below CT + */ +static void iwl_tt_check_exit_ct_kill(struct timer_list *t) +{ + struct iwl_priv *priv = from_timer(priv, t, + thermal_throttle.ct_kill_exit_tm); + struct iwl_tt_mgmt *tt = &priv->thermal_throttle; + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + if (tt->state == IWL_TI_CT_KILL) { + if (priv->thermal_throttle.ct_kill_toggle) { + iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, + CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); + priv->thermal_throttle.ct_kill_toggle = false; + } else { + iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET, + CSR_UCODE_DRV_GP1_REG_BIT_CT_KILL_EXIT); + priv->thermal_throttle.ct_kill_toggle = true; + } + iwl_read32(priv->trans, CSR_UCODE_DRV_GP1); + if (iwl_trans_grab_nic_access(priv->trans)) + iwl_trans_release_nic_access(priv->trans); + + /* Reschedule the ct_kill timer to occur in + * CT_KILL_EXIT_DURATION seconds to ensure we get a + * thermal update */ + IWL_DEBUG_TEMP(priv, "schedule ct_kill exit timer\n"); + mod_timer(&priv->thermal_throttle.ct_kill_exit_tm, + jiffies + CT_KILL_EXIT_DURATION * HZ); + } +} + +static void iwl_perform_ct_kill_task(struct iwl_priv *priv, + bool stop) +{ + if (stop) { + IWL_DEBUG_TEMP(priv, "Stop all queues\n"); + if (priv->mac80211_registered) + ieee80211_stop_queues(priv->hw); + IWL_DEBUG_TEMP(priv, + "Schedule 5 seconds CT_KILL Timer\n"); + mod_timer(&priv->thermal_throttle.ct_kill_exit_tm, + jiffies + CT_KILL_EXIT_DURATION * HZ); + } else { + IWL_DEBUG_TEMP(priv, "Wake all queues\n"); + if (priv->mac80211_registered) + ieee80211_wake_queues(priv->hw); + } +} + +static void iwl_tt_ready_for_ct_kill(struct timer_list *t) +{ + struct iwl_priv *priv = from_timer(priv, t, + thermal_throttle.ct_kill_waiting_tm); + struct iwl_tt_mgmt *tt = &priv->thermal_throttle; + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + /* temperature timer expired, ready to go into CT_KILL state */ + if (tt->state != IWL_TI_CT_KILL) { + IWL_DEBUG_TEMP(priv, "entering CT_KILL state when " + "temperature timer expired\n"); + tt->state = IWL_TI_CT_KILL; + set_bit(STATUS_CT_KILL, &priv->status); + iwl_perform_ct_kill_task(priv, true); + } +} + +static void iwl_prepare_ct_kill_task(struct iwl_priv *priv) +{ + IWL_DEBUG_TEMP(priv, "Prepare to enter IWL_TI_CT_KILL\n"); + /* make request to retrieve statistics information */ + iwl_send_statistics_request(priv, 0, false); + /* Reschedule the ct_kill wait timer */ + mod_timer(&priv->thermal_throttle.ct_kill_waiting_tm, + jiffies + msecs_to_jiffies(CT_KILL_WAITING_DURATION)); +} + +#define IWL_MINIMAL_POWER_THRESHOLD (CT_KILL_THRESHOLD_LEGACY) +#define IWL_REDUCED_PERFORMANCE_THRESHOLD_2 (100) +#define IWL_REDUCED_PERFORMANCE_THRESHOLD_1 (90) + +/* + * Legacy thermal throttling + * 1) Avoid NIC destruction due to high temperatures + * Chip will identify dangerously high temperatures that can + * harm the device and will power down + * 2) Avoid the NIC power down due to high temperature + * Throttle early enough to lower the power consumption before + * drastic steps are needed + */ +static void iwl_legacy_tt_handler(struct iwl_priv *priv, s32 temp, bool force) +{ + struct iwl_tt_mgmt *tt = &priv->thermal_throttle; + enum iwl_tt_state old_state; + +#ifdef CONFIG_IWLWIFI_DEBUG + if ((tt->tt_previous_temp) && + (temp > tt->tt_previous_temp) && + ((temp - tt->tt_previous_temp) > + IWL_TT_INCREASE_MARGIN)) { + IWL_DEBUG_TEMP(priv, + "Temperature increase %d degree Celsius\n", + (temp - tt->tt_previous_temp)); + } +#endif + old_state = tt->state; + /* in Celsius */ + if (temp >= IWL_MINIMAL_POWER_THRESHOLD) + tt->state = IWL_TI_CT_KILL; + else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_2) + tt->state = IWL_TI_2; + else if (temp >= IWL_REDUCED_PERFORMANCE_THRESHOLD_1) + tt->state = IWL_TI_1; + else + tt->state = IWL_TI_0; + +#ifdef CONFIG_IWLWIFI_DEBUG + tt->tt_previous_temp = temp; +#endif + /* stop ct_kill_waiting_tm timer */ + del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm); + if (tt->state != old_state) { + switch (tt->state) { + case IWL_TI_0: + /* + * When the system is ready to go back to IWL_TI_0 + * we only have to call iwl_power_update_mode() to + * do so. + */ + break; + case IWL_TI_1: + tt->tt_power_mode = IWL_POWER_INDEX_3; + break; + case IWL_TI_2: + tt->tt_power_mode = IWL_POWER_INDEX_4; + break; + default: + tt->tt_power_mode = IWL_POWER_INDEX_5; + break; + } + mutex_lock(&priv->mutex); + if (old_state == IWL_TI_CT_KILL) + clear_bit(STATUS_CT_KILL, &priv->status); + if (tt->state != IWL_TI_CT_KILL && + iwl_power_update_mode(priv, true)) { + /* TT state not updated + * try again during next temperature read + */ + if (old_state == IWL_TI_CT_KILL) + set_bit(STATUS_CT_KILL, &priv->status); + tt->state = old_state; + IWL_ERR(priv, "Cannot update power mode, " + "TT state not updated\n"); + } else { + if (tt->state == IWL_TI_CT_KILL) { + if (force) { + set_bit(STATUS_CT_KILL, &priv->status); + iwl_perform_ct_kill_task(priv, true); + } else { + iwl_prepare_ct_kill_task(priv); + tt->state = old_state; + } + } else if (old_state == IWL_TI_CT_KILL) { + iwl_perform_ct_kill_task(priv, false); + } + IWL_DEBUG_TEMP(priv, "Temperature state changed %u\n", + tt->state); + IWL_DEBUG_TEMP(priv, "Power Index change to %u\n", + tt->tt_power_mode); + } + mutex_unlock(&priv->mutex); + } +} + +/* + * Advance thermal throttling + * 1) Avoid NIC destruction due to high temperatures + * Chip will identify dangerously high temperatures that can + * harm the device and will power down + * 2) Avoid the NIC power down due to high temperature + * Throttle early enough to lower the power consumption before + * drastic steps are needed + * Actions include relaxing the power down sleep thresholds and + * decreasing the number of TX streams + * 3) Avoid throughput performance impact as much as possible + * + *============================================================================= + * Condition Nxt State Condition Nxt State Condition Nxt State + *----------------------------------------------------------------------------- + * IWL_TI_0 T >= 114 CT_KILL 114>T>=105 TI_1 N/A N/A + * IWL_TI_1 T >= 114 CT_KILL 114>T>=110 TI_2 T<=95 TI_0 + * IWL_TI_2 T >= 114 CT_KILL T<=100 TI_1 + * IWL_CT_KILL N/A N/A N/A N/A T<=95 TI_0 + *============================================================================= + */ +static void iwl_advance_tt_handler(struct iwl_priv *priv, s32 temp, bool force) +{ + struct iwl_tt_mgmt *tt = &priv->thermal_throttle; + int i; + bool changed = false; + enum iwl_tt_state old_state; + struct iwl_tt_trans *transaction; + + old_state = tt->state; + for (i = 0; i < IWL_TI_STATE_MAX - 1; i++) { + /* based on the current TT state, + * find the curresponding transaction table + * each table has (IWL_TI_STATE_MAX - 1) entries + * tt->transaction + ((old_state * (IWL_TI_STATE_MAX - 1)) + * will advance to the correct table. + * then based on the current temperature + * find the next state need to transaction to + * go through all the possible (IWL_TI_STATE_MAX - 1) entries + * in the current table to see if transaction is needed + */ + transaction = tt->transaction + + ((old_state * (IWL_TI_STATE_MAX - 1)) + i); + if (temp >= transaction->tt_low && + temp <= transaction->tt_high) { +#ifdef CONFIG_IWLWIFI_DEBUG + if ((tt->tt_previous_temp) && + (temp > tt->tt_previous_temp) && + ((temp - tt->tt_previous_temp) > + IWL_TT_INCREASE_MARGIN)) { + IWL_DEBUG_TEMP(priv, + "Temperature increase %d " + "degree Celsius\n", + (temp - tt->tt_previous_temp)); + } + tt->tt_previous_temp = temp; +#endif + if (old_state != + transaction->next_state) { + changed = true; + tt->state = + transaction->next_state; + } + break; + } + } + /* stop ct_kill_waiting_tm timer */ + del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm); + if (changed) { + if (tt->state >= IWL_TI_1) { + /* force PI = IWL_POWER_INDEX_5 in the case of TI > 0 */ + tt->tt_power_mode = IWL_POWER_INDEX_5; + + if (!iwl_ht_enabled(priv)) { + struct iwl_rxon_context *ctx; + + for_each_context(priv, ctx) { + struct iwl_rxon_cmd *rxon; + + rxon = &ctx->staging; + + /* disable HT */ + rxon->flags &= ~( + RXON_FLG_CHANNEL_MODE_MSK | + RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK | + RXON_FLG_HT40_PROT_MSK | + RXON_FLG_HT_PROT_MSK); + } + } else { + /* check HT capability and set + * according to the system HT capability + * in case get disabled before */ + iwl_set_rxon_ht(priv, &priv->current_ht_config); + } + + } else { + /* + * restore system power setting -- it will be + * recalculated automatically. + */ + + /* check HT capability and set + * according to the system HT capability + * in case get disabled before */ + iwl_set_rxon_ht(priv, &priv->current_ht_config); + } + mutex_lock(&priv->mutex); + if (old_state == IWL_TI_CT_KILL) + clear_bit(STATUS_CT_KILL, &priv->status); + if (tt->state != IWL_TI_CT_KILL && + iwl_power_update_mode(priv, true)) { + /* TT state not updated + * try again during next temperature read + */ + IWL_ERR(priv, "Cannot update power mode, " + "TT state not updated\n"); + if (old_state == IWL_TI_CT_KILL) + set_bit(STATUS_CT_KILL, &priv->status); + tt->state = old_state; + } else { + IWL_DEBUG_TEMP(priv, + "Thermal Throttling to new state: %u\n", + tt->state); + if (old_state != IWL_TI_CT_KILL && + tt->state == IWL_TI_CT_KILL) { + if (force) { + IWL_DEBUG_TEMP(priv, + "Enter IWL_TI_CT_KILL\n"); + set_bit(STATUS_CT_KILL, &priv->status); + iwl_perform_ct_kill_task(priv, true); + } else { + tt->state = old_state; + iwl_prepare_ct_kill_task(priv); + } + } else if (old_state == IWL_TI_CT_KILL && + tt->state != IWL_TI_CT_KILL) { + IWL_DEBUG_TEMP(priv, "Exit IWL_TI_CT_KILL\n"); + iwl_perform_ct_kill_task(priv, false); + } + } + mutex_unlock(&priv->mutex); + } +} + +/* Card State Notification indicated reach critical temperature + * if PSP not enable, no Thermal Throttling function will be performed + * just set the GP1 bit to acknowledge the event + * otherwise, go into IWL_TI_CT_KILL state + * since Card State Notification will not provide any temperature reading + * for Legacy mode + * so just pass the CT_KILL temperature to iwl_legacy_tt_handler() + * for advance mode + * pass CT_KILL_THRESHOLD+1 to make sure move into IWL_TI_CT_KILL state + */ +static void iwl_bg_ct_enter(struct work_struct *work) +{ + struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_enter); + struct iwl_tt_mgmt *tt = &priv->thermal_throttle; + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + if (!iwl_is_ready(priv)) + return; + + if (tt->state != IWL_TI_CT_KILL) { + IWL_ERR(priv, "Device reached critical temperature " + "- ucode going to sleep!\n"); + if (!priv->thermal_throttle.advanced_tt) + iwl_legacy_tt_handler(priv, + IWL_MINIMAL_POWER_THRESHOLD, + true); + else + iwl_advance_tt_handler(priv, + CT_KILL_THRESHOLD + 1, true); + } +} + +/* Card State Notification indicated out of critical temperature + * since Card State Notification will not provide any temperature reading + * so pass the IWL_REDUCED_PERFORMANCE_THRESHOLD_2 temperature + * to iwl_legacy_tt_handler() to get out of IWL_CT_KILL state + */ +static void iwl_bg_ct_exit(struct work_struct *work) +{ + struct iwl_priv *priv = container_of(work, struct iwl_priv, ct_exit); + struct iwl_tt_mgmt *tt = &priv->thermal_throttle; + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + if (!iwl_is_ready(priv)) + return; + + /* stop ct_kill_exit_tm timer */ + del_timer_sync(&priv->thermal_throttle.ct_kill_exit_tm); + + if (tt->state == IWL_TI_CT_KILL) { + IWL_ERR(priv, + "Device temperature below critical" + "- ucode awake!\n"); + /* + * exit from CT_KILL state + * reset the current temperature reading + */ + priv->temperature = 0; + if (!priv->thermal_throttle.advanced_tt) + iwl_legacy_tt_handler(priv, + IWL_REDUCED_PERFORMANCE_THRESHOLD_2, + true); + else + iwl_advance_tt_handler(priv, CT_KILL_EXIT_THRESHOLD, + true); + } +} + +void iwl_tt_enter_ct_kill(struct iwl_priv *priv) +{ + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + IWL_DEBUG_TEMP(priv, "Queueing critical temperature enter.\n"); + queue_work(priv->workqueue, &priv->ct_enter); +} + +void iwl_tt_exit_ct_kill(struct iwl_priv *priv) +{ + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + IWL_DEBUG_TEMP(priv, "Queueing critical temperature exit.\n"); + queue_work(priv->workqueue, &priv->ct_exit); +} + +static void iwl_bg_tt_work(struct work_struct *work) +{ + struct iwl_priv *priv = container_of(work, struct iwl_priv, tt_work); + s32 temp = priv->temperature; /* degrees CELSIUS except specified */ + + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + if (!priv->thermal_throttle.advanced_tt) + iwl_legacy_tt_handler(priv, temp, false); + else + iwl_advance_tt_handler(priv, temp, false); +} + +void iwl_tt_handler(struct iwl_priv *priv) +{ + if (test_bit(STATUS_EXIT_PENDING, &priv->status)) + return; + + IWL_DEBUG_TEMP(priv, "Queueing thermal throttling work.\n"); + queue_work(priv->workqueue, &priv->tt_work); +} + +/* Thermal throttling initialization + * For advance thermal throttling: + * Initialize Thermal Index and temperature threshold table + * Initialize thermal throttling restriction table + */ +void iwl_tt_initialize(struct iwl_priv *priv) +{ + struct iwl_tt_mgmt *tt = &priv->thermal_throttle; + int size = sizeof(struct iwl_tt_trans) * (IWL_TI_STATE_MAX - 1); + struct iwl_tt_trans *transaction; + + IWL_DEBUG_TEMP(priv, "Initialize Thermal Throttling\n"); + + memset(tt, 0, sizeof(struct iwl_tt_mgmt)); + + tt->state = IWL_TI_0; + timer_setup(&priv->thermal_throttle.ct_kill_exit_tm, + iwl_tt_check_exit_ct_kill, 0); + timer_setup(&priv->thermal_throttle.ct_kill_waiting_tm, + iwl_tt_ready_for_ct_kill, 0); + /* setup deferred ct kill work */ + INIT_WORK(&priv->tt_work, iwl_bg_tt_work); + INIT_WORK(&priv->ct_enter, iwl_bg_ct_enter); + INIT_WORK(&priv->ct_exit, iwl_bg_ct_exit); + + if (priv->lib->adv_thermal_throttle) { + IWL_DEBUG_TEMP(priv, "Advanced Thermal Throttling\n"); + tt->restriction = kcalloc(IWL_TI_STATE_MAX, + sizeof(struct iwl_tt_restriction), + GFP_KERNEL); + tt->transaction = kcalloc(IWL_TI_STATE_MAX * + (IWL_TI_STATE_MAX - 1), + sizeof(struct iwl_tt_trans), + GFP_KERNEL); + if (!tt->restriction || !tt->transaction) { + IWL_ERR(priv, "Fallback to Legacy Throttling\n"); + priv->thermal_throttle.advanced_tt = false; + kfree(tt->restriction); + tt->restriction = NULL; + kfree(tt->transaction); + tt->transaction = NULL; + } else { + transaction = tt->transaction + + (IWL_TI_0 * (IWL_TI_STATE_MAX - 1)); + memcpy(transaction, &tt_range_0[0], size); + transaction = tt->transaction + + (IWL_TI_1 * (IWL_TI_STATE_MAX - 1)); + memcpy(transaction, &tt_range_1[0], size); + transaction = tt->transaction + + (IWL_TI_2 * (IWL_TI_STATE_MAX - 1)); + memcpy(transaction, &tt_range_2[0], size); + transaction = tt->transaction + + (IWL_TI_CT_KILL * (IWL_TI_STATE_MAX - 1)); + memcpy(transaction, &tt_range_3[0], size); + size = sizeof(struct iwl_tt_restriction) * + IWL_TI_STATE_MAX; + memcpy(tt->restriction, + &restriction_range[0], size); + priv->thermal_throttle.advanced_tt = true; + } + } else { + IWL_DEBUG_TEMP(priv, "Legacy Thermal Throttling\n"); + priv->thermal_throttle.advanced_tt = false; + } +} + +/* cleanup thermal throttling management related memory and timer */ +void iwl_tt_exit(struct iwl_priv *priv) +{ + struct iwl_tt_mgmt *tt = &priv->thermal_throttle; + + /* stop ct_kill_exit_tm timer if activated */ + del_timer_sync(&priv->thermal_throttle.ct_kill_exit_tm); + /* stop ct_kill_waiting_tm timer if activated */ + del_timer_sync(&priv->thermal_throttle.ct_kill_waiting_tm); + cancel_work_sync(&priv->tt_work); + cancel_work_sync(&priv->ct_enter); + cancel_work_sync(&priv->ct_exit); + + if (priv->thermal_throttle.advanced_tt) { + /* free advance thermal throttling memory */ + kfree(tt->restriction); + tt->restriction = NULL; + kfree(tt->transaction); + tt->transaction = NULL; + } +} -- cgit v1.2.3