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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/irqchip/irq-vf610-mscm-ir.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/irqchip/irq-vf610-mscm-ir.c')
-rw-r--r-- | drivers/irqchip/irq-vf610-mscm-ir.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-vf610-mscm-ir.c b/drivers/irqchip/irq-vf610-mscm-ir.c new file mode 100644 index 000000000..2b9a8ba58 --- /dev/null +++ b/drivers/irqchip/irq-vf610-mscm-ir.c @@ -0,0 +1,234 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2014-2015 Toradex AG + * Author: Stefan Agner <stefan@agner.ch> + * + * IRQ chip driver for MSCM interrupt router available on Vybrid SoC's. + * The interrupt router is between the CPU's interrupt controller and the + * peripheral. The router allows to route the peripheral interrupts to + * one of the two available CPU's on Vybrid VF6xx SoC's (Cortex-A5 or + * Cortex-M4). The router will be configured transparently on a IRQ + * request. + * + * o All peripheral interrupts of the Vybrid SoC can be routed to + * CPU 0, CPU 1 or both. The routing is useful for dual-core + * variants of Vybrid SoC such as VF6xx. This driver routes the + * requested interrupt to the CPU currently running on. + * + * o It is required to setup the interrupt router even on single-core + * variants of Vybrid. + */ + +#include <linux/cpu_pm.h> +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/irqchip.h> +#include <linux/irqdomain.h> +#include <linux/mfd/syscon.h> +#include <dt-bindings/interrupt-controller/arm-gic.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/slab.h> +#include <linux/regmap.h> + +#define MSCM_CPxNUM 0x4 + +#define MSCM_IRSPRC(n) (0x80 + 2 * (n)) +#define MSCM_IRSPRC_CPEN_MASK 0x3 + +#define MSCM_IRSPRC_NUM 112 + +struct vf610_mscm_ir_chip_data { + void __iomem *mscm_ir_base; + u16 cpu_mask; + u16 saved_irsprc[MSCM_IRSPRC_NUM]; + bool is_nvic; +}; + +static struct vf610_mscm_ir_chip_data *mscm_ir_data; + +static inline void vf610_mscm_ir_save(struct vf610_mscm_ir_chip_data *data) +{ + int i; + + for (i = 0; i < MSCM_IRSPRC_NUM; i++) + data->saved_irsprc[i] = readw_relaxed(data->mscm_ir_base + MSCM_IRSPRC(i)); +} + +static inline void vf610_mscm_ir_restore(struct vf610_mscm_ir_chip_data *data) +{ + int i; + + for (i = 0; i < MSCM_IRSPRC_NUM; i++) + writew_relaxed(data->saved_irsprc[i], data->mscm_ir_base + MSCM_IRSPRC(i)); +} + +static int vf610_mscm_ir_notifier(struct notifier_block *self, + unsigned long cmd, void *v) +{ + switch (cmd) { + case CPU_CLUSTER_PM_ENTER: + vf610_mscm_ir_save(mscm_ir_data); + break; + case CPU_CLUSTER_PM_ENTER_FAILED: + case CPU_CLUSTER_PM_EXIT: + vf610_mscm_ir_restore(mscm_ir_data); + break; + } + + return NOTIFY_OK; +} + +static struct notifier_block mscm_ir_notifier_block = { + .notifier_call = vf610_mscm_ir_notifier, +}; + +static void vf610_mscm_ir_enable(struct irq_data *data) +{ + irq_hw_number_t hwirq = data->hwirq; + struct vf610_mscm_ir_chip_data *chip_data = data->chip_data; + u16 irsprc; + + irsprc = readw_relaxed(chip_data->mscm_ir_base + MSCM_IRSPRC(hwirq)); + irsprc &= MSCM_IRSPRC_CPEN_MASK; + + WARN_ON(irsprc & ~chip_data->cpu_mask); + + writew_relaxed(chip_data->cpu_mask, + chip_data->mscm_ir_base + MSCM_IRSPRC(hwirq)); + + irq_chip_enable_parent(data); +} + +static void vf610_mscm_ir_disable(struct irq_data *data) +{ + irq_hw_number_t hwirq = data->hwirq; + struct vf610_mscm_ir_chip_data *chip_data = data->chip_data; + + writew_relaxed(0x0, chip_data->mscm_ir_base + MSCM_IRSPRC(hwirq)); + + irq_chip_disable_parent(data); +} + +static struct irq_chip vf610_mscm_ir_irq_chip = { + .name = "mscm-ir", + .irq_mask = irq_chip_mask_parent, + .irq_unmask = irq_chip_unmask_parent, + .irq_eoi = irq_chip_eoi_parent, + .irq_enable = vf610_mscm_ir_enable, + .irq_disable = vf610_mscm_ir_disable, + .irq_retrigger = irq_chip_retrigger_hierarchy, + .irq_set_affinity = irq_chip_set_affinity_parent, +}; + +static int vf610_mscm_ir_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *arg) +{ + int i; + irq_hw_number_t hwirq; + struct irq_fwspec *fwspec = arg; + struct irq_fwspec parent_fwspec; + + if (!irq_domain_get_of_node(domain->parent)) + return -EINVAL; + + if (fwspec->param_count != 2) + return -EINVAL; + + hwirq = fwspec->param[0]; + for (i = 0; i < nr_irqs; i++) + irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i, + &vf610_mscm_ir_irq_chip, + domain->host_data); + + parent_fwspec.fwnode = domain->parent->fwnode; + + if (mscm_ir_data->is_nvic) { + parent_fwspec.param_count = 1; + parent_fwspec.param[0] = fwspec->param[0]; + } else { + parent_fwspec.param_count = 3; + parent_fwspec.param[0] = GIC_SPI; + parent_fwspec.param[1] = fwspec->param[0]; + parent_fwspec.param[2] = fwspec->param[1]; + } + + return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, + &parent_fwspec); +} + +static int vf610_mscm_ir_domain_translate(struct irq_domain *d, + struct irq_fwspec *fwspec, + unsigned long *hwirq, + unsigned int *type) +{ + if (WARN_ON(fwspec->param_count < 2)) + return -EINVAL; + *hwirq = fwspec->param[0]; + *type = fwspec->param[1] & IRQ_TYPE_SENSE_MASK; + return 0; +} + +static const struct irq_domain_ops mscm_irq_domain_ops = { + .translate = vf610_mscm_ir_domain_translate, + .alloc = vf610_mscm_ir_domain_alloc, + .free = irq_domain_free_irqs_common, +}; + +static int __init vf610_mscm_ir_of_init(struct device_node *node, + struct device_node *parent) +{ + struct irq_domain *domain, *domain_parent; + struct regmap *mscm_cp_regmap; + int ret, cpuid; + + domain_parent = irq_find_host(parent); + if (!domain_parent) { + pr_err("vf610_mscm_ir: interrupt-parent not found\n"); + return -EINVAL; + } + + mscm_ir_data = kzalloc(sizeof(*mscm_ir_data), GFP_KERNEL); + if (!mscm_ir_data) + return -ENOMEM; + + mscm_ir_data->mscm_ir_base = of_io_request_and_map(node, 0, "mscm-ir"); + if (IS_ERR(mscm_ir_data->mscm_ir_base)) { + pr_err("vf610_mscm_ir: unable to map mscm register\n"); + ret = PTR_ERR(mscm_ir_data->mscm_ir_base); + goto out_free; + } + + mscm_cp_regmap = syscon_regmap_lookup_by_phandle(node, "fsl,cpucfg"); + if (IS_ERR(mscm_cp_regmap)) { + ret = PTR_ERR(mscm_cp_regmap); + pr_err("vf610_mscm_ir: regmap lookup for cpucfg failed\n"); + goto out_unmap; + } + + regmap_read(mscm_cp_regmap, MSCM_CPxNUM, &cpuid); + mscm_ir_data->cpu_mask = 0x1 << cpuid; + + domain = irq_domain_add_hierarchy(domain_parent, 0, + MSCM_IRSPRC_NUM, node, + &mscm_irq_domain_ops, mscm_ir_data); + if (!domain) { + ret = -ENOMEM; + goto out_unmap; + } + + if (of_device_is_compatible(irq_domain_get_of_node(domain->parent), + "arm,armv7m-nvic")) + mscm_ir_data->is_nvic = true; + + cpu_pm_register_notifier(&mscm_ir_notifier_block); + + return 0; + +out_unmap: + iounmap(mscm_ir_data->mscm_ir_base); +out_free: + kfree(mscm_ir_data); + return ret; +} +IRQCHIP_DECLARE(vf610_mscm_ir, "fsl,vf610-mscm-ir", vf610_mscm_ir_of_init); |