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author | 2023-02-21 18:24:12 -0800 | |
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committer | 2023-02-21 18:24:12 -0800 | |
commit | 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch) | |
tree | cc5c2d0a898769fd59549594fedb3ee6f84e59a0 /arch/arm/mach-omap2/cpuidle34xx.c | |
download | linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip |
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().
...
Diffstat (limited to 'arch/arm/mach-omap2/cpuidle34xx.c')
-rw-r--r-- | arch/arm/mach-omap2/cpuidle34xx.c | 420 |
1 files changed, 420 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c new file mode 100644 index 000000000..2ab5dcbfb --- /dev/null +++ b/arch/arm/mach-omap2/cpuidle34xx.c @@ -0,0 +1,420 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/arch/arm/mach-omap2/cpuidle34xx.c + * + * OMAP3 CPU IDLE Routines + * + * Copyright (C) 2008 Texas Instruments, Inc. + * Rajendra Nayak <rnayak@ti.com> + * + * Copyright (C) 2007 Texas Instruments, Inc. + * Karthik Dasu <karthik-dp@ti.com> + * + * Copyright (C) 2006 Nokia Corporation + * Tony Lindgren <tony@atomide.com> + * + * Copyright (C) 2005 Texas Instruments, Inc. + * Richard Woodruff <r-woodruff2@ti.com> + * + * Based on pm.c for omap2 + */ + +#include <linux/sched.h> +#include <linux/cpuidle.h> +#include <linux/export.h> +#include <linux/cpu_pm.h> +#include <asm/cpuidle.h> + +#include "powerdomain.h" +#include "clockdomain.h" + +#include "pm.h" +#include "control.h" +#include "common.h" +#include "soc.h" + +/* Mach specific information to be recorded in the C-state driver_data */ +struct omap3_idle_statedata { + u8 mpu_state; + u8 core_state; + u8 per_min_state; + u8 flags; +}; + +static struct powerdomain *mpu_pd, *core_pd, *per_pd, *cam_pd; + +/* + * Possible flag bits for struct omap3_idle_statedata.flags: + * + * OMAP_CPUIDLE_CX_NO_CLKDM_IDLE: don't allow the MPU clockdomain to go + * inactive. This in turn prevents the MPU DPLL from entering autoidle + * mode, so wakeup latency is greatly reduced, at the cost of additional + * energy consumption. This also prevents the CORE clockdomain from + * entering idle. + */ +#define OMAP_CPUIDLE_CX_NO_CLKDM_IDLE BIT(0) + +/* + * Prevent PER OFF if CORE is not in RETention or OFF as this would + * disable PER wakeups completely. + */ +static struct omap3_idle_statedata omap3_idle_data[] = { + { + .mpu_state = PWRDM_POWER_ON, + .core_state = PWRDM_POWER_ON, + /* In C1 do not allow PER state lower than CORE state */ + .per_min_state = PWRDM_POWER_ON, + .flags = OMAP_CPUIDLE_CX_NO_CLKDM_IDLE, + }, + { + .mpu_state = PWRDM_POWER_ON, + .core_state = PWRDM_POWER_ON, + .per_min_state = PWRDM_POWER_RET, + }, + { + .mpu_state = PWRDM_POWER_RET, + .core_state = PWRDM_POWER_ON, + .per_min_state = PWRDM_POWER_RET, + }, + { + .mpu_state = PWRDM_POWER_OFF, + .core_state = PWRDM_POWER_ON, + .per_min_state = PWRDM_POWER_RET, + }, + { + .mpu_state = PWRDM_POWER_RET, + .core_state = PWRDM_POWER_RET, + .per_min_state = PWRDM_POWER_OFF, + }, + { + .mpu_state = PWRDM_POWER_OFF, + .core_state = PWRDM_POWER_RET, + .per_min_state = PWRDM_POWER_OFF, + }, + { + .mpu_state = PWRDM_POWER_OFF, + .core_state = PWRDM_POWER_OFF, + .per_min_state = PWRDM_POWER_OFF, + }, +}; + +/** + * omap3_enter_idle - Programs OMAP3 to enter the specified state + * @dev: cpuidle device + * @drv: cpuidle driver + * @index: the index of state to be entered + */ +static int omap3_enter_idle(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) +{ + struct omap3_idle_statedata *cx = &omap3_idle_data[index]; + int error; + + if (omap_irq_pending() || need_resched()) + goto return_sleep_time; + + /* Deny idle for C1 */ + if (cx->flags & OMAP_CPUIDLE_CX_NO_CLKDM_IDLE) { + clkdm_deny_idle(mpu_pd->pwrdm_clkdms[0]); + } else { + pwrdm_set_next_pwrst(mpu_pd, cx->mpu_state); + pwrdm_set_next_pwrst(core_pd, cx->core_state); + } + + /* + * Call idle CPU PM enter notifier chain so that + * VFP context is saved. + */ + if (cx->mpu_state == PWRDM_POWER_OFF) { + error = cpu_pm_enter(); + if (error) + goto out_clkdm_set; + } + + /* Execute ARM wfi */ + omap_sram_idle(true); + + /* + * Call idle CPU PM enter notifier chain to restore + * VFP context. + */ + if (cx->mpu_state == PWRDM_POWER_OFF && + pwrdm_read_prev_pwrst(mpu_pd) == PWRDM_POWER_OFF) + cpu_pm_exit(); + +out_clkdm_set: + /* Re-allow idle for C1 */ + if (cx->flags & OMAP_CPUIDLE_CX_NO_CLKDM_IDLE) + clkdm_allow_idle(mpu_pd->pwrdm_clkdms[0]); + +return_sleep_time: + + return index; +} + +/** + * next_valid_state - Find next valid C-state + * @dev: cpuidle device + * @drv: cpuidle driver + * @index: Index of currently selected c-state + * + * If the state corresponding to index is valid, index is returned back + * to the caller. Else, this function searches for a lower c-state which is + * still valid (as defined in omap3_power_states[]) and returns its index. + * + * A state is valid if the 'valid' field is enabled and + * if it satisfies the enable_off_mode condition. + */ +static int next_valid_state(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index) +{ + struct omap3_idle_statedata *cx = &omap3_idle_data[index]; + u32 mpu_deepest_state = PWRDM_POWER_RET; + u32 core_deepest_state = PWRDM_POWER_RET; + int idx; + int next_index = 0; /* C1 is the default value */ + + if (enable_off_mode) { + mpu_deepest_state = PWRDM_POWER_OFF; + /* + * Erratum i583: valable for ES rev < Es1.2 on 3630. + * CORE OFF mode is not supported in a stable form, restrict + * instead the CORE state to RET. + */ + if (!IS_PM34XX_ERRATUM(PM_SDRC_WAKEUP_ERRATUM_i583)) + core_deepest_state = PWRDM_POWER_OFF; + } + + /* Check if current state is valid */ + if ((cx->mpu_state >= mpu_deepest_state) && + (cx->core_state >= core_deepest_state)) + return index; + + /* + * Drop to next valid state. + * Start search from the next (lower) state. + */ + for (idx = index - 1; idx >= 0; idx--) { + cx = &omap3_idle_data[idx]; + if ((cx->mpu_state >= mpu_deepest_state) && + (cx->core_state >= core_deepest_state)) { + next_index = idx; + break; + } + } + + return next_index; +} + +/** + * omap3_enter_idle_bm - Checks for any bus activity + * @dev: cpuidle device + * @drv: cpuidle driver + * @index: array index of target state to be programmed + * + * This function checks for any pending activity and then programs + * the device to the specified or a safer state. + */ +static int omap3_enter_idle_bm(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) +{ + int new_state_idx, ret; + u8 per_next_state, per_saved_state; + struct omap3_idle_statedata *cx; + + /* + * Use only C1 if CAM is active. + * CAM does not have wakeup capability in OMAP3. + */ + if (pwrdm_read_pwrst(cam_pd) == PWRDM_POWER_ON) + new_state_idx = drv->safe_state_index; + else + new_state_idx = next_valid_state(dev, drv, index); + + /* + * FIXME: we currently manage device-specific idle states + * for PER and CORE in combination with CPU-specific + * idle states. This is wrong, and device-specific + * idle management needs to be separated out into + * its own code. + */ + + /* Program PER state */ + cx = &omap3_idle_data[new_state_idx]; + + per_next_state = pwrdm_read_next_pwrst(per_pd); + per_saved_state = per_next_state; + if (per_next_state < cx->per_min_state) { + per_next_state = cx->per_min_state; + pwrdm_set_next_pwrst(per_pd, per_next_state); + } + + ret = omap3_enter_idle(dev, drv, new_state_idx); + + /* Restore original PER state if it was modified */ + if (per_next_state != per_saved_state) + pwrdm_set_next_pwrst(per_pd, per_saved_state); + + return ret; +} + +static struct cpuidle_driver omap3_idle_driver = { + .name = "omap3_idle", + .owner = THIS_MODULE, + .states = { + { + .flags = CPUIDLE_FLAG_RCU_IDLE, + .enter = omap3_enter_idle_bm, + .exit_latency = 2 + 2, + .target_residency = 5, + .name = "C1", + .desc = "MPU ON + CORE ON", + }, + { + .flags = CPUIDLE_FLAG_RCU_IDLE, + .enter = omap3_enter_idle_bm, + .exit_latency = 10 + 10, + .target_residency = 30, + .name = "C2", + .desc = "MPU ON + CORE ON", + }, + { + .flags = CPUIDLE_FLAG_RCU_IDLE, + .enter = omap3_enter_idle_bm, + .exit_latency = 50 + 50, + .target_residency = 300, + .name = "C3", + .desc = "MPU RET + CORE ON", + }, + { + .flags = CPUIDLE_FLAG_RCU_IDLE, + .enter = omap3_enter_idle_bm, + .exit_latency = 1500 + 1800, + .target_residency = 4000, + .name = "C4", + .desc = "MPU OFF + CORE ON", + }, + { + .flags = CPUIDLE_FLAG_RCU_IDLE, + .enter = omap3_enter_idle_bm, + .exit_latency = 2500 + 7500, + .target_residency = 12000, + .name = "C5", + .desc = "MPU RET + CORE RET", + }, + { + .flags = CPUIDLE_FLAG_RCU_IDLE, + .enter = omap3_enter_idle_bm, + .exit_latency = 3000 + 8500, + .target_residency = 15000, + .name = "C6", + .desc = "MPU OFF + CORE RET", + }, + { + .flags = CPUIDLE_FLAG_RCU_IDLE, + .enter = omap3_enter_idle_bm, + .exit_latency = 10000 + 30000, + .target_residency = 30000, + .name = "C7", + .desc = "MPU OFF + CORE OFF", + }, + }, + .state_count = ARRAY_SIZE(omap3_idle_data), + .safe_state_index = 0, +}; + +/* + * Numbers based on measurements made in October 2009 for PM optimized kernel + * with CPU freq enabled on device Nokia N900. Assumes OPP2 (main idle OPP, + * and worst case latencies). + */ +static struct cpuidle_driver omap3430_idle_driver = { + .name = "omap3430_idle", + .owner = THIS_MODULE, + .states = { + { + .flags = CPUIDLE_FLAG_RCU_IDLE, + .enter = omap3_enter_idle_bm, + .exit_latency = 110 + 162, + .target_residency = 5, + .name = "C1", + .desc = "MPU ON + CORE ON", + }, + { + .flags = CPUIDLE_FLAG_RCU_IDLE, + .enter = omap3_enter_idle_bm, + .exit_latency = 106 + 180, + .target_residency = 309, + .name = "C2", + .desc = "MPU ON + CORE ON", + }, + { + .flags = CPUIDLE_FLAG_RCU_IDLE, + .enter = omap3_enter_idle_bm, + .exit_latency = 107 + 410, + .target_residency = 46057, + .name = "C3", + .desc = "MPU RET + CORE ON", + }, + { + .flags = CPUIDLE_FLAG_RCU_IDLE, + .enter = omap3_enter_idle_bm, + .exit_latency = 121 + 3374, + .target_residency = 46057, + .name = "C4", + .desc = "MPU OFF + CORE ON", + }, + { + .flags = CPUIDLE_FLAG_RCU_IDLE, + .enter = omap3_enter_idle_bm, + .exit_latency = 855 + 1146, + .target_residency = 46057, + .name = "C5", + .desc = "MPU RET + CORE RET", + }, + { + .flags = CPUIDLE_FLAG_RCU_IDLE, + .enter = omap3_enter_idle_bm, + .exit_latency = 7580 + 4134, + .target_residency = 484329, + .name = "C6", + .desc = "MPU OFF + CORE RET", + }, + { + .flags = CPUIDLE_FLAG_RCU_IDLE, + .enter = omap3_enter_idle_bm, + .exit_latency = 7505 + 15274, + .target_residency = 484329, + .name = "C7", + .desc = "MPU OFF + CORE OFF", + }, + }, + .state_count = ARRAY_SIZE(omap3_idle_data), + .safe_state_index = 0, +}; + +/* Public functions */ + +/** + * omap3_idle_init - Init routine for OMAP3 idle + * + * Registers the OMAP3 specific cpuidle driver to the cpuidle + * framework with the valid set of states. + */ +int __init omap3_idle_init(void) +{ + mpu_pd = pwrdm_lookup("mpu_pwrdm"); + core_pd = pwrdm_lookup("core_pwrdm"); + per_pd = pwrdm_lookup("per_pwrdm"); + cam_pd = pwrdm_lookup("cam_pwrdm"); + + if (!mpu_pd || !core_pd || !per_pd || !cam_pd) + return -ENODEV; + + if (cpu_is_omap3430()) + return cpuidle_register(&omap3430_idle_driver, NULL); + else + return cpuidle_register(&omap3_idle_driver, NULL); +} |