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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/cpufreq/apple-soc-cpufreq.c
downloadlinux-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 'drivers/cpufreq/apple-soc-cpufreq.c')
-rw-r--r--drivers/cpufreq/apple-soc-cpufreq.c353
1 files changed, 353 insertions, 0 deletions
diff --git a/drivers/cpufreq/apple-soc-cpufreq.c b/drivers/cpufreq/apple-soc-cpufreq.c
new file mode 100644
index 000000000..c11d22fd8
--- /dev/null
+++ b/drivers/cpufreq/apple-soc-cpufreq.c
@@ -0,0 +1,353 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Apple SoC CPU cluster performance state driver
+ *
+ * Copyright The Asahi Linux Contributors
+ *
+ * Based on scpi-cpufreq.c
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/cpu.h>
+#include <linux/cpufreq.h>
+#include <linux/cpumask.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/pm_opp.h>
+#include <linux/slab.h>
+
+#define APPLE_DVFS_CMD 0x20
+#define APPLE_DVFS_CMD_BUSY BIT(31)
+#define APPLE_DVFS_CMD_SET BIT(25)
+#define APPLE_DVFS_CMD_PS2 GENMASK(16, 12)
+#define APPLE_DVFS_CMD_PS1 GENMASK(4, 0)
+
+/* Same timebase as CPU counter (24MHz) */
+#define APPLE_DVFS_LAST_CHG_TIME 0x38
+
+/*
+ * Apple ran out of bits and had to shift this in T8112...
+ */
+#define APPLE_DVFS_STATUS 0x50
+#define APPLE_DVFS_STATUS_CUR_PS_T8103 GENMASK(7, 4)
+#define APPLE_DVFS_STATUS_CUR_PS_SHIFT_T8103 4
+#define APPLE_DVFS_STATUS_TGT_PS_T8103 GENMASK(3, 0)
+#define APPLE_DVFS_STATUS_CUR_PS_T8112 GENMASK(9, 5)
+#define APPLE_DVFS_STATUS_CUR_PS_SHIFT_T8112 5
+#define APPLE_DVFS_STATUS_TGT_PS_T8112 GENMASK(4, 0)
+
+/*
+ * Div is +1, base clock is 12MHz on existing SoCs.
+ * For documentation purposes. We use the OPP table to
+ * get the frequency.
+ */
+#define APPLE_DVFS_PLL_STATUS 0xc0
+#define APPLE_DVFS_PLL_FACTOR 0xc8
+#define APPLE_DVFS_PLL_FACTOR_MULT GENMASK(31, 16)
+#define APPLE_DVFS_PLL_FACTOR_DIV GENMASK(15, 0)
+
+#define APPLE_DVFS_TRANSITION_TIMEOUT 100
+
+struct apple_soc_cpufreq_info {
+ u64 max_pstate;
+ u64 cur_pstate_mask;
+ u64 cur_pstate_shift;
+};
+
+struct apple_cpu_priv {
+ struct device *cpu_dev;
+ void __iomem *reg_base;
+ const struct apple_soc_cpufreq_info *info;
+};
+
+static struct cpufreq_driver apple_soc_cpufreq_driver;
+
+static const struct apple_soc_cpufreq_info soc_t8103_info = {
+ .max_pstate = 15,
+ .cur_pstate_mask = APPLE_DVFS_STATUS_CUR_PS_T8103,
+ .cur_pstate_shift = APPLE_DVFS_STATUS_CUR_PS_SHIFT_T8103,
+};
+
+static const struct apple_soc_cpufreq_info soc_t8112_info = {
+ .max_pstate = 31,
+ .cur_pstate_mask = APPLE_DVFS_STATUS_CUR_PS_T8112,
+ .cur_pstate_shift = APPLE_DVFS_STATUS_CUR_PS_SHIFT_T8112,
+};
+
+static const struct apple_soc_cpufreq_info soc_default_info = {
+ .max_pstate = 15,
+ .cur_pstate_mask = 0, /* fallback */
+};
+
+static const struct of_device_id apple_soc_cpufreq_of_match[] = {
+ {
+ .compatible = "apple,t8103-cluster-cpufreq",
+ .data = &soc_t8103_info,
+ },
+ {
+ .compatible = "apple,t8112-cluster-cpufreq",
+ .data = &soc_t8112_info,
+ },
+ {
+ .compatible = "apple,cluster-cpufreq",
+ .data = &soc_default_info,
+ },
+ {}
+};
+
+static unsigned int apple_soc_cpufreq_get_rate(unsigned int cpu)
+{
+ struct cpufreq_policy *policy = cpufreq_cpu_get_raw(cpu);
+ struct apple_cpu_priv *priv = policy->driver_data;
+ struct cpufreq_frequency_table *p;
+ unsigned int pstate;
+
+ if (priv->info->cur_pstate_mask) {
+ u64 reg = readq_relaxed(priv->reg_base + APPLE_DVFS_STATUS);
+
+ pstate = (reg & priv->info->cur_pstate_mask) >> priv->info->cur_pstate_shift;
+ } else {
+ /*
+ * For the fallback case we might not know the layout of DVFS_STATUS,
+ * so just use the command register value (which ignores boost limitations).
+ */
+ u64 reg = readq_relaxed(priv->reg_base + APPLE_DVFS_CMD);
+
+ pstate = FIELD_GET(APPLE_DVFS_CMD_PS1, reg);
+ }
+
+ cpufreq_for_each_valid_entry(p, policy->freq_table)
+ if (p->driver_data == pstate)
+ return p->frequency;
+
+ dev_err(priv->cpu_dev, "could not find frequency for pstate %d\n",
+ pstate);
+ return 0;
+}
+
+static int apple_soc_cpufreq_set_target(struct cpufreq_policy *policy,
+ unsigned int index)
+{
+ struct apple_cpu_priv *priv = policy->driver_data;
+ unsigned int pstate = policy->freq_table[index].driver_data;
+ u64 reg;
+
+ /* Fallback for newer SoCs */
+ if (index > priv->info->max_pstate)
+ index = priv->info->max_pstate;
+
+ if (readq_poll_timeout_atomic(priv->reg_base + APPLE_DVFS_CMD, reg,
+ !(reg & APPLE_DVFS_CMD_BUSY), 2,
+ APPLE_DVFS_TRANSITION_TIMEOUT)) {
+ return -EIO;
+ }
+
+ reg &= ~(APPLE_DVFS_CMD_PS1 | APPLE_DVFS_CMD_PS2);
+ reg |= FIELD_PREP(APPLE_DVFS_CMD_PS1, pstate);
+ reg |= FIELD_PREP(APPLE_DVFS_CMD_PS2, pstate);
+ reg |= APPLE_DVFS_CMD_SET;
+
+ writeq_relaxed(reg, priv->reg_base + APPLE_DVFS_CMD);
+
+ return 0;
+}
+
+static unsigned int apple_soc_cpufreq_fast_switch(struct cpufreq_policy *policy,
+ unsigned int target_freq)
+{
+ if (apple_soc_cpufreq_set_target(policy, policy->cached_resolved_idx) < 0)
+ return 0;
+
+ return policy->freq_table[policy->cached_resolved_idx].frequency;
+}
+
+static int apple_soc_cpufreq_find_cluster(struct cpufreq_policy *policy,
+ void __iomem **reg_base,
+ const struct apple_soc_cpufreq_info **info)
+{
+ struct of_phandle_args args;
+ const struct of_device_id *match;
+ int ret = 0;
+
+ ret = of_perf_domain_get_sharing_cpumask(policy->cpu, "performance-domains",
+ "#performance-domain-cells",
+ policy->cpus, &args);
+ if (ret < 0)
+ return ret;
+
+ match = of_match_node(apple_soc_cpufreq_of_match, args.np);
+ of_node_put(args.np);
+ if (!match)
+ return -ENODEV;
+
+ *info = match->data;
+
+ *reg_base = of_iomap(args.np, 0);
+ if (IS_ERR(*reg_base))
+ return PTR_ERR(*reg_base);
+
+ return 0;
+}
+
+static struct freq_attr *apple_soc_cpufreq_hw_attr[] = {
+ &cpufreq_freq_attr_scaling_available_freqs,
+ NULL, /* Filled in below if boost is enabled */
+ NULL,
+};
+
+static int apple_soc_cpufreq_init(struct cpufreq_policy *policy)
+{
+ int ret, i;
+ unsigned int transition_latency;
+ void __iomem *reg_base;
+ struct device *cpu_dev;
+ struct apple_cpu_priv *priv;
+ const struct apple_soc_cpufreq_info *info;
+ struct cpufreq_frequency_table *freq_table;
+
+ cpu_dev = get_cpu_device(policy->cpu);
+ if (!cpu_dev) {
+ pr_err("failed to get cpu%d device\n", policy->cpu);
+ return -ENODEV;
+ }
+
+ ret = dev_pm_opp_of_add_table(cpu_dev);
+ if (ret < 0) {
+ dev_err(cpu_dev, "%s: failed to add OPP table: %d\n", __func__, ret);
+ return ret;
+ }
+
+ ret = apple_soc_cpufreq_find_cluster(policy, &reg_base, &info);
+ if (ret) {
+ dev_err(cpu_dev, "%s: failed to get cluster info: %d\n", __func__, ret);
+ return ret;
+ }
+
+ ret = dev_pm_opp_set_sharing_cpus(cpu_dev, policy->cpus);
+ if (ret) {
+ dev_err(cpu_dev, "%s: failed to mark OPPs as shared: %d\n", __func__, ret);
+ goto out_iounmap;
+ }
+
+ ret = dev_pm_opp_get_opp_count(cpu_dev);
+ if (ret <= 0) {
+ dev_dbg(cpu_dev, "OPP table is not ready, deferring probe\n");
+ ret = -EPROBE_DEFER;
+ goto out_free_opp;
+ }
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv) {
+ ret = -ENOMEM;
+ goto out_free_opp;
+ }
+
+ ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table);
+ if (ret) {
+ dev_err(cpu_dev, "failed to init cpufreq table: %d\n", ret);
+ goto out_free_priv;
+ }
+
+ /* Get OPP levels (p-state indexes) and stash them in driver_data */
+ for (i = 0; freq_table[i].frequency != CPUFREQ_TABLE_END; i++) {
+ unsigned long rate = freq_table[i].frequency * 1000 + 999;
+ struct dev_pm_opp *opp = dev_pm_opp_find_freq_floor(cpu_dev, &rate);
+
+ if (IS_ERR(opp)) {
+ ret = PTR_ERR(opp);
+ goto out_free_cpufreq_table;
+ }
+ freq_table[i].driver_data = dev_pm_opp_get_level(opp);
+ dev_pm_opp_put(opp);
+ }
+
+ priv->cpu_dev = cpu_dev;
+ priv->reg_base = reg_base;
+ priv->info = info;
+ policy->driver_data = priv;
+ policy->freq_table = freq_table;
+
+ transition_latency = dev_pm_opp_get_max_transition_latency(cpu_dev);
+ if (!transition_latency)
+ transition_latency = CPUFREQ_ETERNAL;
+
+ policy->cpuinfo.transition_latency = transition_latency;
+ policy->dvfs_possible_from_any_cpu = true;
+ policy->fast_switch_possible = true;
+ policy->suspend_freq = freq_table[0].frequency;
+
+ if (policy_has_boost_freq(policy)) {
+ ret = cpufreq_enable_boost_support();
+ if (ret) {
+ dev_warn(cpu_dev, "failed to enable boost: %d\n", ret);
+ } else {
+ apple_soc_cpufreq_hw_attr[1] = &cpufreq_freq_attr_scaling_boost_freqs;
+ apple_soc_cpufreq_driver.boost_enabled = true;
+ }
+ }
+
+ return 0;
+
+out_free_cpufreq_table:
+ dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table);
+out_free_priv:
+ kfree(priv);
+out_free_opp:
+ dev_pm_opp_remove_all_dynamic(cpu_dev);
+out_iounmap:
+ iounmap(reg_base);
+ return ret;
+}
+
+static int apple_soc_cpufreq_exit(struct cpufreq_policy *policy)
+{
+ struct apple_cpu_priv *priv = policy->driver_data;
+
+ dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table);
+ dev_pm_opp_remove_all_dynamic(priv->cpu_dev);
+ iounmap(priv->reg_base);
+ kfree(priv);
+
+ return 0;
+}
+
+static struct cpufreq_driver apple_soc_cpufreq_driver = {
+ .name = "apple-cpufreq",
+ .flags = CPUFREQ_HAVE_GOVERNOR_PER_POLICY |
+ CPUFREQ_NEED_INITIAL_FREQ_CHECK | CPUFREQ_IS_COOLING_DEV,
+ .verify = cpufreq_generic_frequency_table_verify,
+ .get = apple_soc_cpufreq_get_rate,
+ .init = apple_soc_cpufreq_init,
+ .exit = apple_soc_cpufreq_exit,
+ .target_index = apple_soc_cpufreq_set_target,
+ .fast_switch = apple_soc_cpufreq_fast_switch,
+ .register_em = cpufreq_register_em_with_opp,
+ .attr = apple_soc_cpufreq_hw_attr,
+ .suspend = cpufreq_generic_suspend,
+};
+
+static int __init apple_soc_cpufreq_module_init(void)
+{
+ if (!of_machine_is_compatible("apple,arm-platform"))
+ return -ENODEV;
+
+ return cpufreq_register_driver(&apple_soc_cpufreq_driver);
+}
+module_init(apple_soc_cpufreq_module_init);
+
+static void __exit apple_soc_cpufreq_module_exit(void)
+{
+ cpufreq_unregister_driver(&apple_soc_cpufreq_driver);
+}
+module_exit(apple_soc_cpufreq_module_exit);
+
+MODULE_DEVICE_TABLE(of, apple_soc_cpufreq_of_match);
+MODULE_AUTHOR("Hector Martin <marcan@marcan.st>");
+MODULE_DESCRIPTION("Apple SoC CPU cluster DVFS driver");
+MODULE_LICENSE("GPL");