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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 /drivers/interconnect/qcom/bcm-voter.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 'drivers/interconnect/qcom/bcm-voter.c')
-rw-r--r-- | drivers/interconnect/qcom/bcm-voter.c | 379 |
1 files changed, 379 insertions, 0 deletions
diff --git a/drivers/interconnect/qcom/bcm-voter.c b/drivers/interconnect/qcom/bcm-voter.c new file mode 100644 index 000000000..8f385f9c2 --- /dev/null +++ b/drivers/interconnect/qcom/bcm-voter.c @@ -0,0 +1,379 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved. + */ + +#include <asm/div64.h> +#include <linux/interconnect-provider.h> +#include <linux/list_sort.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> + +#include <soc/qcom/rpmh.h> +#include <soc/qcom/tcs.h> + +#include "bcm-voter.h" +#include "icc-rpmh.h" + +static LIST_HEAD(bcm_voters); +static DEFINE_MUTEX(bcm_voter_lock); + +/** + * struct bcm_voter - Bus Clock Manager voter + * @dev: reference to the device that communicates with the BCM + * @np: reference to the device node to match bcm voters + * @lock: mutex to protect commit and wake/sleep lists in the voter + * @commit_list: list containing bcms to be committed to hardware + * @ws_list: list containing bcms that have different wake/sleep votes + * @voter_node: list of bcm voters + * @tcs_wait: mask for which buckets require TCS completion + */ +struct bcm_voter { + struct device *dev; + struct device_node *np; + struct mutex lock; + struct list_head commit_list; + struct list_head ws_list; + struct list_head voter_node; + u32 tcs_wait; +}; + +static int cmp_vcd(void *priv, const struct list_head *a, const struct list_head *b) +{ + const struct qcom_icc_bcm *bcm_a = list_entry(a, struct qcom_icc_bcm, list); + const struct qcom_icc_bcm *bcm_b = list_entry(b, struct qcom_icc_bcm, list); + + return bcm_a->aux_data.vcd - bcm_b->aux_data.vcd; +} + +static u64 bcm_div(u64 num, u32 base) +{ + /* Ensure that small votes aren't lost. */ + if (num && num < base) + return 1; + + do_div(num, base); + + return num; +} + +static void bcm_aggregate(struct qcom_icc_bcm *bcm) +{ + struct qcom_icc_node *node; + size_t i, bucket; + u64 agg_avg[QCOM_ICC_NUM_BUCKETS] = {0}; + u64 agg_peak[QCOM_ICC_NUM_BUCKETS] = {0}; + u64 temp; + + for (bucket = 0; bucket < QCOM_ICC_NUM_BUCKETS; bucket++) { + for (i = 0; i < bcm->num_nodes; i++) { + node = bcm->nodes[i]; + temp = bcm_div(node->sum_avg[bucket] * bcm->aux_data.width, + node->buswidth * node->channels); + agg_avg[bucket] = max(agg_avg[bucket], temp); + + temp = bcm_div(node->max_peak[bucket] * bcm->aux_data.width, + node->buswidth); + agg_peak[bucket] = max(agg_peak[bucket], temp); + } + + temp = agg_avg[bucket] * bcm->vote_scale; + bcm->vote_x[bucket] = bcm_div(temp, bcm->aux_data.unit); + + temp = agg_peak[bucket] * bcm->vote_scale; + bcm->vote_y[bucket] = bcm_div(temp, bcm->aux_data.unit); + } + + if (bcm->keepalive && bcm->vote_x[QCOM_ICC_BUCKET_AMC] == 0 && + bcm->vote_y[QCOM_ICC_BUCKET_AMC] == 0) { + bcm->vote_x[QCOM_ICC_BUCKET_AMC] = 1; + bcm->vote_x[QCOM_ICC_BUCKET_WAKE] = 1; + bcm->vote_y[QCOM_ICC_BUCKET_AMC] = 1; + bcm->vote_y[QCOM_ICC_BUCKET_WAKE] = 1; + } +} + +static inline void tcs_cmd_gen(struct tcs_cmd *cmd, u64 vote_x, u64 vote_y, + u32 addr, bool commit, bool wait) +{ + bool valid = true; + + if (!cmd) + return; + + memset(cmd, 0, sizeof(*cmd)); + + if (vote_x == 0 && vote_y == 0) + valid = false; + + if (vote_x > BCM_TCS_CMD_VOTE_MASK) + vote_x = BCM_TCS_CMD_VOTE_MASK; + + if (vote_y > BCM_TCS_CMD_VOTE_MASK) + vote_y = BCM_TCS_CMD_VOTE_MASK; + + cmd->addr = addr; + cmd->data = BCM_TCS_CMD(commit, valid, vote_x, vote_y); + + /* + * Set the wait for completion flag on command that need to be completed + * before the next command. + */ + cmd->wait = wait; +} + +static void tcs_list_gen(struct bcm_voter *voter, int bucket, + struct tcs_cmd tcs_list[MAX_VCD], + int n[MAX_VCD + 1]) +{ + struct list_head *bcm_list = &voter->commit_list; + struct qcom_icc_bcm *bcm; + bool commit, wait; + size_t idx = 0, batch = 0, cur_vcd_size = 0; + + memset(n, 0, sizeof(int) * (MAX_VCD + 1)); + + list_for_each_entry(bcm, bcm_list, list) { + commit = false; + cur_vcd_size++; + if ((list_is_last(&bcm->list, bcm_list)) || + bcm->aux_data.vcd != list_next_entry(bcm, list)->aux_data.vcd) { + commit = true; + cur_vcd_size = 0; + } + + wait = commit && (voter->tcs_wait & BIT(bucket)); + + tcs_cmd_gen(&tcs_list[idx], bcm->vote_x[bucket], + bcm->vote_y[bucket], bcm->addr, commit, wait); + idx++; + n[batch]++; + /* + * Batch the BCMs in such a way that we do not split them in + * multiple payloads when they are under the same VCD. This is + * to ensure that every BCM is committed since we only set the + * commit bit on the last BCM request of every VCD. + */ + if (n[batch] >= MAX_RPMH_PAYLOAD) { + if (!commit) { + n[batch] -= cur_vcd_size; + n[batch + 1] = cur_vcd_size; + } + batch++; + } + } +} + +/** + * of_bcm_voter_get - gets a bcm voter handle from DT node + * @dev: device pointer for the consumer device + * @name: name for the bcm voter device + * + * This function will match a device_node pointer for the phandle + * specified in the device DT and return a bcm_voter handle on success. + * + * Returns bcm_voter pointer or ERR_PTR() on error. EPROBE_DEFER is returned + * when matching bcm voter is yet to be found. + */ +struct bcm_voter *of_bcm_voter_get(struct device *dev, const char *name) +{ + struct bcm_voter *voter = ERR_PTR(-EPROBE_DEFER); + struct bcm_voter *temp; + struct device_node *np, *node; + int idx = 0; + + if (!dev || !dev->of_node) + return ERR_PTR(-ENODEV); + + np = dev->of_node; + + if (name) { + idx = of_property_match_string(np, "qcom,bcm-voter-names", name); + if (idx < 0) + return ERR_PTR(idx); + } + + node = of_parse_phandle(np, "qcom,bcm-voters", idx); + + mutex_lock(&bcm_voter_lock); + list_for_each_entry(temp, &bcm_voters, voter_node) { + if (temp->np == node) { + voter = temp; + break; + } + } + mutex_unlock(&bcm_voter_lock); + + of_node_put(node); + return voter; +} +EXPORT_SYMBOL_GPL(of_bcm_voter_get); + +/** + * qcom_icc_bcm_voter_add - queues up the bcm nodes that require updates + * @voter: voter that the bcms are being added to + * @bcm: bcm to add to the commit and wake sleep list + */ +void qcom_icc_bcm_voter_add(struct bcm_voter *voter, struct qcom_icc_bcm *bcm) +{ + if (!voter) + return; + + mutex_lock(&voter->lock); + if (list_empty(&bcm->list)) + list_add_tail(&bcm->list, &voter->commit_list); + + if (list_empty(&bcm->ws_list)) + list_add_tail(&bcm->ws_list, &voter->ws_list); + + mutex_unlock(&voter->lock); +} +EXPORT_SYMBOL_GPL(qcom_icc_bcm_voter_add); + +/** + * qcom_icc_bcm_voter_commit - generates and commits tcs cmds based on bcms + * @voter: voter that needs flushing + * + * This function generates a set of AMC commands and flushes to the BCM device + * associated with the voter. It conditionally generate WAKE and SLEEP commands + * based on deltas between WAKE/SLEEP requirements. The ws_list persists + * through multiple commit requests and bcm nodes are removed only when the + * requirements for WAKE matches SLEEP. + * + * Returns 0 on success, or an appropriate error code otherwise. + */ +int qcom_icc_bcm_voter_commit(struct bcm_voter *voter) +{ + struct qcom_icc_bcm *bcm; + struct qcom_icc_bcm *bcm_tmp; + int commit_idx[MAX_VCD + 1]; + struct tcs_cmd cmds[MAX_BCMS]; + int ret = 0; + + if (!voter) + return 0; + + mutex_lock(&voter->lock); + list_for_each_entry(bcm, &voter->commit_list, list) + bcm_aggregate(bcm); + + /* + * Pre sort the BCMs based on VCD for ease of generating a command list + * that groups the BCMs with the same VCD together. VCDs are numbered + * with lowest being the most expensive time wise, ensuring that + * those commands are being sent the earliest in the queue. This needs + * to be sorted every commit since we can't guarantee the order in which + * the BCMs are added to the list. + */ + list_sort(NULL, &voter->commit_list, cmp_vcd); + + /* + * Construct the command list based on a pre ordered list of BCMs + * based on VCD. + */ + tcs_list_gen(voter, QCOM_ICC_BUCKET_AMC, cmds, commit_idx); + if (!commit_idx[0]) + goto out; + + rpmh_invalidate(voter->dev); + + ret = rpmh_write_batch(voter->dev, RPMH_ACTIVE_ONLY_STATE, + cmds, commit_idx); + if (ret) { + pr_err("Error sending AMC RPMH requests (%d)\n", ret); + goto out; + } + + list_for_each_entry_safe(bcm, bcm_tmp, &voter->commit_list, list) + list_del_init(&bcm->list); + + list_for_each_entry_safe(bcm, bcm_tmp, &voter->ws_list, ws_list) { + /* + * Only generate WAKE and SLEEP commands if a resource's + * requirements change as the execution environment transitions + * between different power states. + */ + if (bcm->vote_x[QCOM_ICC_BUCKET_WAKE] != + bcm->vote_x[QCOM_ICC_BUCKET_SLEEP] || + bcm->vote_y[QCOM_ICC_BUCKET_WAKE] != + bcm->vote_y[QCOM_ICC_BUCKET_SLEEP]) + list_add_tail(&bcm->list, &voter->commit_list); + else + list_del_init(&bcm->ws_list); + } + + if (list_empty(&voter->commit_list)) + goto out; + + list_sort(NULL, &voter->commit_list, cmp_vcd); + + tcs_list_gen(voter, QCOM_ICC_BUCKET_WAKE, cmds, commit_idx); + + ret = rpmh_write_batch(voter->dev, RPMH_WAKE_ONLY_STATE, cmds, commit_idx); + if (ret) { + pr_err("Error sending WAKE RPMH requests (%d)\n", ret); + goto out; + } + + tcs_list_gen(voter, QCOM_ICC_BUCKET_SLEEP, cmds, commit_idx); + + ret = rpmh_write_batch(voter->dev, RPMH_SLEEP_STATE, cmds, commit_idx); + if (ret) { + pr_err("Error sending SLEEP RPMH requests (%d)\n", ret); + goto out; + } + +out: + list_for_each_entry_safe(bcm, bcm_tmp, &voter->commit_list, list) + list_del_init(&bcm->list); + + mutex_unlock(&voter->lock); + return ret; +} +EXPORT_SYMBOL_GPL(qcom_icc_bcm_voter_commit); + +static int qcom_icc_bcm_voter_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct bcm_voter *voter; + + voter = devm_kzalloc(&pdev->dev, sizeof(*voter), GFP_KERNEL); + if (!voter) + return -ENOMEM; + + voter->dev = &pdev->dev; + voter->np = np; + + if (of_property_read_u32(np, "qcom,tcs-wait", &voter->tcs_wait)) + voter->tcs_wait = QCOM_ICC_TAG_ACTIVE_ONLY; + + mutex_init(&voter->lock); + INIT_LIST_HEAD(&voter->commit_list); + INIT_LIST_HEAD(&voter->ws_list); + + mutex_lock(&bcm_voter_lock); + list_add_tail(&voter->voter_node, &bcm_voters); + mutex_unlock(&bcm_voter_lock); + + return 0; +} + +static const struct of_device_id bcm_voter_of_match[] = { + { .compatible = "qcom,bcm-voter" }, + { } +}; +MODULE_DEVICE_TABLE(of, bcm_voter_of_match); + +static struct platform_driver qcom_icc_bcm_voter_driver = { + .probe = qcom_icc_bcm_voter_probe, + .driver = { + .name = "bcm_voter", + .of_match_table = bcm_voter_of_match, + }, +}; +module_platform_driver(qcom_icc_bcm_voter_driver); + +MODULE_AUTHOR("David Dai <daidavid1@codeaurora.org>"); +MODULE_DESCRIPTION("Qualcomm BCM Voter interconnect driver"); +MODULE_LICENSE("GPL v2"); |