1200 lines
31 KiB
C
1200 lines
31 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright The Asahi Linux Contributors
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*
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* Based on irq-lpc32xx:
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* Copyright 2015-2016 Vladimir Zapolskiy <vz@mleia.com>
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* Based on irq-bcm2836:
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* Copyright 2015 Broadcom
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*/
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/*
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* AIC is a fairly simple interrupt controller with the following features:
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*
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* - 896 level-triggered hardware IRQs
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* - Single mask bit per IRQ
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* - Per-IRQ affinity setting
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* - Automatic masking on event delivery (auto-ack)
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* - Software triggering (ORed with hw line)
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* - 2 per-CPU IPIs (meant as "self" and "other", but they are
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* interchangeable if not symmetric)
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* - Automatic prioritization (single event/ack register per CPU, lower IRQs =
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* higher priority)
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* - Automatic masking on ack
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* - Default "this CPU" register view and explicit per-CPU views
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*
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* In addition, this driver also handles FIQs, as these are routed to the same
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* IRQ vector. These are used for Fast IPIs, the ARMv8 timer IRQs, and
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* performance counters (TODO).
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*
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* Implementation notes:
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*
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* - This driver creates two IRQ domains, one for HW IRQs and internal FIQs,
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* and one for IPIs.
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* - Since Linux needs more than 2 IPIs, we implement a software IRQ controller
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* and funnel all IPIs into one per-CPU IPI (the second "self" IPI is unused).
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* - FIQ hwirq numbers are assigned after true hwirqs, and are per-cpu.
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* - DT bindings use 3-cell form (like GIC):
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* - <0 nr flags> - hwirq #nr
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* - <1 nr flags> - FIQ #nr
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* - nr=0 Physical HV timer
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* - nr=1 Virtual HV timer
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* - nr=2 Physical guest timer
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* - nr=3 Virtual guest timer
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/bits.h>
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#include <linux/bitfield.h>
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#include <linux/cpuhotplug.h>
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#include <linux/io.h>
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#include <linux/irqchip.h>
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#include <linux/irqchip/arm-vgic-info.h>
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#include <linux/irqdomain.h>
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#include <linux/jump_label.h>
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#include <linux/limits.h>
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#include <linux/of_address.h>
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#include <linux/slab.h>
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#include <asm/apple_m1_pmu.h>
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#include <asm/cputype.h>
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#include <asm/exception.h>
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#include <asm/sysreg.h>
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#include <asm/virt.h>
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#include <dt-bindings/interrupt-controller/apple-aic.h>
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/*
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* AIC v1 registers (MMIO)
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*/
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#define AIC_INFO 0x0004
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#define AIC_INFO_NR_IRQ GENMASK(15, 0)
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#define AIC_CONFIG 0x0010
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#define AIC_WHOAMI 0x2000
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#define AIC_EVENT 0x2004
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#define AIC_EVENT_DIE GENMASK(31, 24)
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#define AIC_EVENT_TYPE GENMASK(23, 16)
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#define AIC_EVENT_NUM GENMASK(15, 0)
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#define AIC_EVENT_TYPE_FIQ 0 /* Software use */
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#define AIC_EVENT_TYPE_IRQ 1
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#define AIC_EVENT_TYPE_IPI 4
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#define AIC_EVENT_IPI_OTHER 1
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#define AIC_EVENT_IPI_SELF 2
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#define AIC_IPI_SEND 0x2008
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#define AIC_IPI_ACK 0x200c
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#define AIC_IPI_MASK_SET 0x2024
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#define AIC_IPI_MASK_CLR 0x2028
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#define AIC_IPI_SEND_CPU(cpu) BIT(cpu)
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#define AIC_IPI_OTHER BIT(0)
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#define AIC_IPI_SELF BIT(31)
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#define AIC_TARGET_CPU 0x3000
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#define AIC_CPU_IPI_SET(cpu) (0x5008 + ((cpu) << 7))
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#define AIC_CPU_IPI_CLR(cpu) (0x500c + ((cpu) << 7))
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#define AIC_CPU_IPI_MASK_SET(cpu) (0x5024 + ((cpu) << 7))
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#define AIC_CPU_IPI_MASK_CLR(cpu) (0x5028 + ((cpu) << 7))
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#define AIC_MAX_IRQ 0x400
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/*
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* AIC v2 registers (MMIO)
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*/
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#define AIC2_VERSION 0x0000
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#define AIC2_VERSION_VER GENMASK(7, 0)
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#define AIC2_INFO1 0x0004
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#define AIC2_INFO1_NR_IRQ GENMASK(15, 0)
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#define AIC2_INFO1_LAST_DIE GENMASK(27, 24)
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#define AIC2_INFO2 0x0008
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#define AIC2_INFO3 0x000c
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#define AIC2_INFO3_MAX_IRQ GENMASK(15, 0)
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#define AIC2_INFO3_MAX_DIE GENMASK(27, 24)
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#define AIC2_RESET 0x0010
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#define AIC2_RESET_RESET BIT(0)
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#define AIC2_CONFIG 0x0014
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#define AIC2_CONFIG_ENABLE BIT(0)
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#define AIC2_CONFIG_PREFER_PCPU BIT(28)
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#define AIC2_TIMEOUT 0x0028
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#define AIC2_CLUSTER_PRIO 0x0030
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#define AIC2_DELAY_GROUPS 0x0100
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#define AIC2_IRQ_CFG 0x2000
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/*
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* AIC2 registers are laid out like this, starting at AIC2_IRQ_CFG:
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*
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* Repeat for each die:
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* IRQ_CFG: u32 * MAX_IRQS
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* SW_SET: u32 * (MAX_IRQS / 32)
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* SW_CLR: u32 * (MAX_IRQS / 32)
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* MASK_SET: u32 * (MAX_IRQS / 32)
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* MASK_CLR: u32 * (MAX_IRQS / 32)
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* HW_STATE: u32 * (MAX_IRQS / 32)
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*
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* This is followed by a set of event registers, each 16K page aligned.
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* The first one is the AP event register we will use. Unfortunately,
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* the actual implemented die count is not specified anywhere in the
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* capability registers, so we have to explicitly specify the event
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* register as a second reg entry in the device tree to remain
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* forward-compatible.
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*/
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#define AIC2_IRQ_CFG_TARGET GENMASK(3, 0)
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#define AIC2_IRQ_CFG_DELAY_IDX GENMASK(7, 5)
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#define MASK_REG(x) (4 * ((x) >> 5))
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#define MASK_BIT(x) BIT((x) & GENMASK(4, 0))
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/*
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* IMP-DEF sysregs that control FIQ sources
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*/
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/* IPI request registers */
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#define SYS_IMP_APL_IPI_RR_LOCAL_EL1 sys_reg(3, 5, 15, 0, 0)
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#define SYS_IMP_APL_IPI_RR_GLOBAL_EL1 sys_reg(3, 5, 15, 0, 1)
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#define IPI_RR_CPU GENMASK(7, 0)
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/* Cluster only used for the GLOBAL register */
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#define IPI_RR_CLUSTER GENMASK(23, 16)
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#define IPI_RR_TYPE GENMASK(29, 28)
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#define IPI_RR_IMMEDIATE 0
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#define IPI_RR_RETRACT 1
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#define IPI_RR_DEFERRED 2
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#define IPI_RR_NOWAKE 3
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/* IPI status register */
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#define SYS_IMP_APL_IPI_SR_EL1 sys_reg(3, 5, 15, 1, 1)
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#define IPI_SR_PENDING BIT(0)
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/* Guest timer FIQ enable register */
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#define SYS_IMP_APL_VM_TMR_FIQ_ENA_EL2 sys_reg(3, 5, 15, 1, 3)
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#define VM_TMR_FIQ_ENABLE_V BIT(0)
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#define VM_TMR_FIQ_ENABLE_P BIT(1)
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/* Deferred IPI countdown register */
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#define SYS_IMP_APL_IPI_CR_EL1 sys_reg(3, 5, 15, 3, 1)
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/* Uncore PMC control register */
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#define SYS_IMP_APL_UPMCR0_EL1 sys_reg(3, 7, 15, 0, 4)
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#define UPMCR0_IMODE GENMASK(18, 16)
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#define UPMCR0_IMODE_OFF 0
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#define UPMCR0_IMODE_AIC 2
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#define UPMCR0_IMODE_HALT 3
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#define UPMCR0_IMODE_FIQ 4
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/* Uncore PMC status register */
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#define SYS_IMP_APL_UPMSR_EL1 sys_reg(3, 7, 15, 6, 4)
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#define UPMSR_IACT BIT(0)
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/* MPIDR fields */
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#define MPIDR_CPU(x) MPIDR_AFFINITY_LEVEL(x, 0)
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#define MPIDR_CLUSTER(x) MPIDR_AFFINITY_LEVEL(x, 1)
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#define AIC_IRQ_HWIRQ(die, irq) (FIELD_PREP(AIC_EVENT_DIE, die) | \
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FIELD_PREP(AIC_EVENT_TYPE, AIC_EVENT_TYPE_IRQ) | \
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FIELD_PREP(AIC_EVENT_NUM, irq))
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#define AIC_FIQ_HWIRQ(x) (FIELD_PREP(AIC_EVENT_TYPE, AIC_EVENT_TYPE_FIQ) | \
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FIELD_PREP(AIC_EVENT_NUM, x))
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#define AIC_HWIRQ_IRQ(x) FIELD_GET(AIC_EVENT_NUM, x)
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#define AIC_HWIRQ_DIE(x) FIELD_GET(AIC_EVENT_DIE, x)
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#define AIC_NR_FIQ 6
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#define AIC_NR_SWIPI 32
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/*
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* FIQ hwirq index definitions: FIQ sources use the DT binding defines
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* directly, except that timers are special. At the irqchip level, the
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* two timer types are represented by their access method: _EL0 registers
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* or _EL02 registers. In the DT binding, the timers are represented
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* by their purpose (HV or guest). This mapping is for when the kernel is
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* running at EL2 (with VHE). When the kernel is running at EL1, the
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* mapping differs and aic_irq_domain_translate() performs the remapping.
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*/
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#define AIC_TMR_EL0_PHYS AIC_TMR_HV_PHYS
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#define AIC_TMR_EL0_VIRT AIC_TMR_HV_VIRT
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#define AIC_TMR_EL02_PHYS AIC_TMR_GUEST_PHYS
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#define AIC_TMR_EL02_VIRT AIC_TMR_GUEST_VIRT
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static DEFINE_STATIC_KEY_TRUE(use_fast_ipi);
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struct aic_info {
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int version;
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/* Register offsets */
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u32 event;
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u32 target_cpu;
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u32 irq_cfg;
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u32 sw_set;
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u32 sw_clr;
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u32 mask_set;
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u32 mask_clr;
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u32 die_stride;
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/* Features */
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bool fast_ipi;
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};
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static const struct aic_info aic1_info = {
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.version = 1,
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.event = AIC_EVENT,
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.target_cpu = AIC_TARGET_CPU,
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};
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static const struct aic_info aic1_fipi_info = {
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.version = 1,
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.event = AIC_EVENT,
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.target_cpu = AIC_TARGET_CPU,
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.fast_ipi = true,
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};
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static const struct aic_info aic2_info = {
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.version = 2,
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.irq_cfg = AIC2_IRQ_CFG,
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.fast_ipi = true,
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};
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static const struct of_device_id aic_info_match[] = {
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{
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.compatible = "apple,t8103-aic",
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.data = &aic1_fipi_info,
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},
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{
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.compatible = "apple,aic",
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.data = &aic1_info,
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},
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{
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.compatible = "apple,aic2",
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.data = &aic2_info,
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},
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{}
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};
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struct aic_irq_chip {
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void __iomem *base;
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void __iomem *event;
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struct irq_domain *hw_domain;
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struct irq_domain *ipi_domain;
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struct {
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cpumask_t aff;
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} *fiq_aff[AIC_NR_FIQ];
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int nr_irq;
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int max_irq;
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int nr_die;
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int max_die;
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struct aic_info info;
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};
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static DEFINE_PER_CPU(uint32_t, aic_fiq_unmasked);
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static DEFINE_PER_CPU(atomic_t, aic_vipi_flag);
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static DEFINE_PER_CPU(atomic_t, aic_vipi_enable);
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static struct aic_irq_chip *aic_irqc;
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static void aic_handle_ipi(struct pt_regs *regs);
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static u32 aic_ic_read(struct aic_irq_chip *ic, u32 reg)
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{
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return readl_relaxed(ic->base + reg);
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}
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static void aic_ic_write(struct aic_irq_chip *ic, u32 reg, u32 val)
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{
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writel_relaxed(val, ic->base + reg);
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}
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/*
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* IRQ irqchip
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*/
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static void aic_irq_mask(struct irq_data *d)
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{
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irq_hw_number_t hwirq = irqd_to_hwirq(d);
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struct aic_irq_chip *ic = irq_data_get_irq_chip_data(d);
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u32 off = AIC_HWIRQ_DIE(hwirq) * ic->info.die_stride;
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u32 irq = AIC_HWIRQ_IRQ(hwirq);
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aic_ic_write(ic, ic->info.mask_set + off + MASK_REG(irq), MASK_BIT(irq));
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}
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static void aic_irq_unmask(struct irq_data *d)
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{
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irq_hw_number_t hwirq = irqd_to_hwirq(d);
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struct aic_irq_chip *ic = irq_data_get_irq_chip_data(d);
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u32 off = AIC_HWIRQ_DIE(hwirq) * ic->info.die_stride;
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u32 irq = AIC_HWIRQ_IRQ(hwirq);
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aic_ic_write(ic, ic->info.mask_clr + off + MASK_REG(irq), MASK_BIT(irq));
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}
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static void aic_irq_eoi(struct irq_data *d)
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{
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/*
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* Reading the interrupt reason automatically acknowledges and masks
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* the IRQ, so we just unmask it here if needed.
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*/
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if (!irqd_irq_masked(d))
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aic_irq_unmask(d);
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}
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static void __exception_irq_entry aic_handle_irq(struct pt_regs *regs)
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{
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struct aic_irq_chip *ic = aic_irqc;
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u32 event, type, irq;
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do {
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/*
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* We cannot use a relaxed read here, as reads from DMA buffers
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* need to be ordered after the IRQ fires.
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*/
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event = readl(ic->event + ic->info.event);
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type = FIELD_GET(AIC_EVENT_TYPE, event);
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irq = FIELD_GET(AIC_EVENT_NUM, event);
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if (type == AIC_EVENT_TYPE_IRQ)
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generic_handle_domain_irq(aic_irqc->hw_domain, event);
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else if (type == AIC_EVENT_TYPE_IPI && irq == 1)
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aic_handle_ipi(regs);
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else if (event != 0)
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pr_err_ratelimited("Unknown IRQ event %d, %d\n", type, irq);
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} while (event);
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/*
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* vGIC maintenance interrupts end up here too, so we need to check
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* for them separately. This should never trigger if KVM is working
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* properly, because it will have already taken care of clearing it
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* on guest exit before this handler runs.
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*/
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if (is_kernel_in_hyp_mode() && (read_sysreg_s(SYS_ICH_HCR_EL2) & ICH_HCR_EN) &&
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read_sysreg_s(SYS_ICH_MISR_EL2) != 0) {
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pr_err_ratelimited("vGIC IRQ fired and not handled by KVM, disabling.\n");
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sysreg_clear_set_s(SYS_ICH_HCR_EL2, ICH_HCR_EN, 0);
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}
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}
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static int aic_irq_set_affinity(struct irq_data *d,
|
||
|
const struct cpumask *mask_val, bool force)
|
||
|
{
|
||
|
irq_hw_number_t hwirq = irqd_to_hwirq(d);
|
||
|
struct aic_irq_chip *ic = irq_data_get_irq_chip_data(d);
|
||
|
int cpu;
|
||
|
|
||
|
BUG_ON(!ic->info.target_cpu);
|
||
|
|
||
|
if (force)
|
||
|
cpu = cpumask_first(mask_val);
|
||
|
else
|
||
|
cpu = cpumask_any_and(mask_val, cpu_online_mask);
|
||
|
|
||
|
aic_ic_write(ic, ic->info.target_cpu + AIC_HWIRQ_IRQ(hwirq) * 4, BIT(cpu));
|
||
|
irq_data_update_effective_affinity(d, cpumask_of(cpu));
|
||
|
|
||
|
return IRQ_SET_MASK_OK;
|
||
|
}
|
||
|
|
||
|
static int aic_irq_set_type(struct irq_data *d, unsigned int type)
|
||
|
{
|
||
|
/*
|
||
|
* Some IRQs (e.g. MSIs) implicitly have edge semantics, and we don't
|
||
|
* have a way to find out the type of any given IRQ, so just allow both.
|
||
|
*/
|
||
|
return (type == IRQ_TYPE_LEVEL_HIGH || type == IRQ_TYPE_EDGE_RISING) ? 0 : -EINVAL;
|
||
|
}
|
||
|
|
||
|
static struct irq_chip aic_chip = {
|
||
|
.name = "AIC",
|
||
|
.irq_mask = aic_irq_mask,
|
||
|
.irq_unmask = aic_irq_unmask,
|
||
|
.irq_eoi = aic_irq_eoi,
|
||
|
.irq_set_affinity = aic_irq_set_affinity,
|
||
|
.irq_set_type = aic_irq_set_type,
|
||
|
};
|
||
|
|
||
|
static struct irq_chip aic2_chip = {
|
||
|
.name = "AIC2",
|
||
|
.irq_mask = aic_irq_mask,
|
||
|
.irq_unmask = aic_irq_unmask,
|
||
|
.irq_eoi = aic_irq_eoi,
|
||
|
.irq_set_type = aic_irq_set_type,
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* FIQ irqchip
|
||
|
*/
|
||
|
|
||
|
static unsigned long aic_fiq_get_idx(struct irq_data *d)
|
||
|
{
|
||
|
return AIC_HWIRQ_IRQ(irqd_to_hwirq(d));
|
||
|
}
|
||
|
|
||
|
static void aic_fiq_set_mask(struct irq_data *d)
|
||
|
{
|
||
|
/* Only the guest timers have real mask bits, unfortunately. */
|
||
|
switch (aic_fiq_get_idx(d)) {
|
||
|
case AIC_TMR_EL02_PHYS:
|
||
|
sysreg_clear_set_s(SYS_IMP_APL_VM_TMR_FIQ_ENA_EL2, VM_TMR_FIQ_ENABLE_P, 0);
|
||
|
isb();
|
||
|
break;
|
||
|
case AIC_TMR_EL02_VIRT:
|
||
|
sysreg_clear_set_s(SYS_IMP_APL_VM_TMR_FIQ_ENA_EL2, VM_TMR_FIQ_ENABLE_V, 0);
|
||
|
isb();
|
||
|
break;
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void aic_fiq_clear_mask(struct irq_data *d)
|
||
|
{
|
||
|
switch (aic_fiq_get_idx(d)) {
|
||
|
case AIC_TMR_EL02_PHYS:
|
||
|
sysreg_clear_set_s(SYS_IMP_APL_VM_TMR_FIQ_ENA_EL2, 0, VM_TMR_FIQ_ENABLE_P);
|
||
|
isb();
|
||
|
break;
|
||
|
case AIC_TMR_EL02_VIRT:
|
||
|
sysreg_clear_set_s(SYS_IMP_APL_VM_TMR_FIQ_ENA_EL2, 0, VM_TMR_FIQ_ENABLE_V);
|
||
|
isb();
|
||
|
break;
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void aic_fiq_mask(struct irq_data *d)
|
||
|
{
|
||
|
aic_fiq_set_mask(d);
|
||
|
__this_cpu_and(aic_fiq_unmasked, ~BIT(aic_fiq_get_idx(d)));
|
||
|
}
|
||
|
|
||
|
static void aic_fiq_unmask(struct irq_data *d)
|
||
|
{
|
||
|
aic_fiq_clear_mask(d);
|
||
|
__this_cpu_or(aic_fiq_unmasked, BIT(aic_fiq_get_idx(d)));
|
||
|
}
|
||
|
|
||
|
static void aic_fiq_eoi(struct irq_data *d)
|
||
|
{
|
||
|
/* We mask to ack (where we can), so we need to unmask at EOI. */
|
||
|
if (__this_cpu_read(aic_fiq_unmasked) & BIT(aic_fiq_get_idx(d)))
|
||
|
aic_fiq_clear_mask(d);
|
||
|
}
|
||
|
|
||
|
#define TIMER_FIRING(x) \
|
||
|
(((x) & (ARCH_TIMER_CTRL_ENABLE | ARCH_TIMER_CTRL_IT_MASK | \
|
||
|
ARCH_TIMER_CTRL_IT_STAT)) == \
|
||
|
(ARCH_TIMER_CTRL_ENABLE | ARCH_TIMER_CTRL_IT_STAT))
|
||
|
|
||
|
static void __exception_irq_entry aic_handle_fiq(struct pt_regs *regs)
|
||
|
{
|
||
|
/*
|
||
|
* It would be really nice if we had a system register that lets us get
|
||
|
* the FIQ source state without having to peek down into sources...
|
||
|
* but such a register does not seem to exist.
|
||
|
*
|
||
|
* So, we have these potential sources to test for:
|
||
|
* - Fast IPIs (not yet used)
|
||
|
* - The 4 timers (CNTP, CNTV for each of HV and guest)
|
||
|
* - Per-core PMCs (not yet supported)
|
||
|
* - Per-cluster uncore PMCs (not yet supported)
|
||
|
*
|
||
|
* Since not dealing with any of these results in a FIQ storm,
|
||
|
* we check for everything here, even things we don't support yet.
|
||
|
*/
|
||
|
|
||
|
if (read_sysreg_s(SYS_IMP_APL_IPI_SR_EL1) & IPI_SR_PENDING) {
|
||
|
if (static_branch_likely(&use_fast_ipi)) {
|
||
|
aic_handle_ipi(regs);
|
||
|
} else {
|
||
|
pr_err_ratelimited("Fast IPI fired. Acking.\n");
|
||
|
write_sysreg_s(IPI_SR_PENDING, SYS_IMP_APL_IPI_SR_EL1);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (TIMER_FIRING(read_sysreg(cntp_ctl_el0)))
|
||
|
generic_handle_domain_irq(aic_irqc->hw_domain,
|
||
|
AIC_FIQ_HWIRQ(AIC_TMR_EL0_PHYS));
|
||
|
|
||
|
if (TIMER_FIRING(read_sysreg(cntv_ctl_el0)))
|
||
|
generic_handle_domain_irq(aic_irqc->hw_domain,
|
||
|
AIC_FIQ_HWIRQ(AIC_TMR_EL0_VIRT));
|
||
|
|
||
|
if (is_kernel_in_hyp_mode()) {
|
||
|
uint64_t enabled = read_sysreg_s(SYS_IMP_APL_VM_TMR_FIQ_ENA_EL2);
|
||
|
|
||
|
if ((enabled & VM_TMR_FIQ_ENABLE_P) &&
|
||
|
TIMER_FIRING(read_sysreg_s(SYS_CNTP_CTL_EL02)))
|
||
|
generic_handle_domain_irq(aic_irqc->hw_domain,
|
||
|
AIC_FIQ_HWIRQ(AIC_TMR_EL02_PHYS));
|
||
|
|
||
|
if ((enabled & VM_TMR_FIQ_ENABLE_V) &&
|
||
|
TIMER_FIRING(read_sysreg_s(SYS_CNTV_CTL_EL02)))
|
||
|
generic_handle_domain_irq(aic_irqc->hw_domain,
|
||
|
AIC_FIQ_HWIRQ(AIC_TMR_EL02_VIRT));
|
||
|
}
|
||
|
|
||
|
if (read_sysreg_s(SYS_IMP_APL_PMCR0_EL1) & PMCR0_IACT) {
|
||
|
int irq;
|
||
|
if (cpumask_test_cpu(smp_processor_id(),
|
||
|
&aic_irqc->fiq_aff[AIC_CPU_PMU_P]->aff))
|
||
|
irq = AIC_CPU_PMU_P;
|
||
|
else
|
||
|
irq = AIC_CPU_PMU_E;
|
||
|
generic_handle_domain_irq(aic_irqc->hw_domain,
|
||
|
AIC_FIQ_HWIRQ(irq));
|
||
|
}
|
||
|
|
||
|
if (FIELD_GET(UPMCR0_IMODE, read_sysreg_s(SYS_IMP_APL_UPMCR0_EL1)) == UPMCR0_IMODE_FIQ &&
|
||
|
(read_sysreg_s(SYS_IMP_APL_UPMSR_EL1) & UPMSR_IACT)) {
|
||
|
/* Same story with uncore PMCs */
|
||
|
pr_err_ratelimited("Uncore PMC FIQ fired. Masking.\n");
|
||
|
sysreg_clear_set_s(SYS_IMP_APL_UPMCR0_EL1, UPMCR0_IMODE,
|
||
|
FIELD_PREP(UPMCR0_IMODE, UPMCR0_IMODE_OFF));
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static int aic_fiq_set_type(struct irq_data *d, unsigned int type)
|
||
|
{
|
||
|
return (type == IRQ_TYPE_LEVEL_HIGH) ? 0 : -EINVAL;
|
||
|
}
|
||
|
|
||
|
static struct irq_chip fiq_chip = {
|
||
|
.name = "AIC-FIQ",
|
||
|
.irq_mask = aic_fiq_mask,
|
||
|
.irq_unmask = aic_fiq_unmask,
|
||
|
.irq_ack = aic_fiq_set_mask,
|
||
|
.irq_eoi = aic_fiq_eoi,
|
||
|
.irq_set_type = aic_fiq_set_type,
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* Main IRQ domain
|
||
|
*/
|
||
|
|
||
|
static int aic_irq_domain_map(struct irq_domain *id, unsigned int irq,
|
||
|
irq_hw_number_t hw)
|
||
|
{
|
||
|
struct aic_irq_chip *ic = id->host_data;
|
||
|
u32 type = FIELD_GET(AIC_EVENT_TYPE, hw);
|
||
|
struct irq_chip *chip = &aic_chip;
|
||
|
|
||
|
if (ic->info.version == 2)
|
||
|
chip = &aic2_chip;
|
||
|
|
||
|
if (type == AIC_EVENT_TYPE_IRQ) {
|
||
|
irq_domain_set_info(id, irq, hw, chip, id->host_data,
|
||
|
handle_fasteoi_irq, NULL, NULL);
|
||
|
irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(irq)));
|
||
|
} else {
|
||
|
int fiq = FIELD_GET(AIC_EVENT_NUM, hw);
|
||
|
|
||
|
switch (fiq) {
|
||
|
case AIC_CPU_PMU_P:
|
||
|
case AIC_CPU_PMU_E:
|
||
|
irq_set_percpu_devid_partition(irq, &ic->fiq_aff[fiq]->aff);
|
||
|
break;
|
||
|
default:
|
||
|
irq_set_percpu_devid(irq);
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
irq_domain_set_info(id, irq, hw, &fiq_chip, id->host_data,
|
||
|
handle_percpu_devid_irq, NULL, NULL);
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int aic_irq_domain_translate(struct irq_domain *id,
|
||
|
struct irq_fwspec *fwspec,
|
||
|
unsigned long *hwirq,
|
||
|
unsigned int *type)
|
||
|
{
|
||
|
struct aic_irq_chip *ic = id->host_data;
|
||
|
u32 *args;
|
||
|
u32 die = 0;
|
||
|
|
||
|
if (fwspec->param_count < 3 || fwspec->param_count > 4 ||
|
||
|
!is_of_node(fwspec->fwnode))
|
||
|
return -EINVAL;
|
||
|
|
||
|
args = &fwspec->param[1];
|
||
|
|
||
|
if (fwspec->param_count == 4) {
|
||
|
die = args[0];
|
||
|
args++;
|
||
|
}
|
||
|
|
||
|
switch (fwspec->param[0]) {
|
||
|
case AIC_IRQ:
|
||
|
if (die >= ic->nr_die)
|
||
|
return -EINVAL;
|
||
|
if (args[0] >= ic->nr_irq)
|
||
|
return -EINVAL;
|
||
|
*hwirq = AIC_IRQ_HWIRQ(die, args[0]);
|
||
|
break;
|
||
|
case AIC_FIQ:
|
||
|
if (die != 0)
|
||
|
return -EINVAL;
|
||
|
if (args[0] >= AIC_NR_FIQ)
|
||
|
return -EINVAL;
|
||
|
*hwirq = AIC_FIQ_HWIRQ(args[0]);
|
||
|
|
||
|
/*
|
||
|
* In EL1 the non-redirected registers are the guest's,
|
||
|
* not EL2's, so remap the hwirqs to match.
|
||
|
*/
|
||
|
if (!is_kernel_in_hyp_mode()) {
|
||
|
switch (args[0]) {
|
||
|
case AIC_TMR_GUEST_PHYS:
|
||
|
*hwirq = AIC_FIQ_HWIRQ(AIC_TMR_EL0_PHYS);
|
||
|
break;
|
||
|
case AIC_TMR_GUEST_VIRT:
|
||
|
*hwirq = AIC_FIQ_HWIRQ(AIC_TMR_EL0_VIRT);
|
||
|
break;
|
||
|
case AIC_TMR_HV_PHYS:
|
||
|
case AIC_TMR_HV_VIRT:
|
||
|
return -ENOENT;
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
break;
|
||
|
default:
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
|
||
|
*type = args[1] & IRQ_TYPE_SENSE_MASK;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int aic_irq_domain_alloc(struct irq_domain *domain, unsigned int virq,
|
||
|
unsigned int nr_irqs, void *arg)
|
||
|
{
|
||
|
unsigned int type = IRQ_TYPE_NONE;
|
||
|
struct irq_fwspec *fwspec = arg;
|
||
|
irq_hw_number_t hwirq;
|
||
|
int i, ret;
|
||
|
|
||
|
ret = aic_irq_domain_translate(domain, fwspec, &hwirq, &type);
|
||
|
if (ret)
|
||
|
return ret;
|
||
|
|
||
|
for (i = 0; i < nr_irqs; i++) {
|
||
|
ret = aic_irq_domain_map(domain, virq + i, hwirq + i);
|
||
|
if (ret)
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static void aic_irq_domain_free(struct irq_domain *domain, unsigned int virq,
|
||
|
unsigned int nr_irqs)
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
for (i = 0; i < nr_irqs; i++) {
|
||
|
struct irq_data *d = irq_domain_get_irq_data(domain, virq + i);
|
||
|
|
||
|
irq_set_handler(virq + i, NULL);
|
||
|
irq_domain_reset_irq_data(d);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static const struct irq_domain_ops aic_irq_domain_ops = {
|
||
|
.translate = aic_irq_domain_translate,
|
||
|
.alloc = aic_irq_domain_alloc,
|
||
|
.free = aic_irq_domain_free,
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* IPI irqchip
|
||
|
*/
|
||
|
|
||
|
static void aic_ipi_send_fast(int cpu)
|
||
|
{
|
||
|
u64 mpidr = cpu_logical_map(cpu);
|
||
|
u64 my_mpidr = read_cpuid_mpidr();
|
||
|
u64 cluster = MPIDR_CLUSTER(mpidr);
|
||
|
u64 idx = MPIDR_CPU(mpidr);
|
||
|
|
||
|
if (MPIDR_CLUSTER(my_mpidr) == cluster)
|
||
|
write_sysreg_s(FIELD_PREP(IPI_RR_CPU, idx),
|
||
|
SYS_IMP_APL_IPI_RR_LOCAL_EL1);
|
||
|
else
|
||
|
write_sysreg_s(FIELD_PREP(IPI_RR_CPU, idx) | FIELD_PREP(IPI_RR_CLUSTER, cluster),
|
||
|
SYS_IMP_APL_IPI_RR_GLOBAL_EL1);
|
||
|
isb();
|
||
|
}
|
||
|
|
||
|
static void aic_ipi_mask(struct irq_data *d)
|
||
|
{
|
||
|
u32 irq_bit = BIT(irqd_to_hwirq(d));
|
||
|
|
||
|
/* No specific ordering requirements needed here. */
|
||
|
atomic_andnot(irq_bit, this_cpu_ptr(&aic_vipi_enable));
|
||
|
}
|
||
|
|
||
|
static void aic_ipi_unmask(struct irq_data *d)
|
||
|
{
|
||
|
struct aic_irq_chip *ic = irq_data_get_irq_chip_data(d);
|
||
|
u32 irq_bit = BIT(irqd_to_hwirq(d));
|
||
|
|
||
|
atomic_or(irq_bit, this_cpu_ptr(&aic_vipi_enable));
|
||
|
|
||
|
/*
|
||
|
* The atomic_or() above must complete before the atomic_read()
|
||
|
* below to avoid racing aic_ipi_send_mask().
|
||
|
*/
|
||
|
smp_mb__after_atomic();
|
||
|
|
||
|
/*
|
||
|
* If a pending vIPI was unmasked, raise a HW IPI to ourselves.
|
||
|
* No barriers needed here since this is a self-IPI.
|
||
|
*/
|
||
|
if (atomic_read(this_cpu_ptr(&aic_vipi_flag)) & irq_bit) {
|
||
|
if (static_branch_likely(&use_fast_ipi))
|
||
|
aic_ipi_send_fast(smp_processor_id());
|
||
|
else
|
||
|
aic_ic_write(ic, AIC_IPI_SEND, AIC_IPI_SEND_CPU(smp_processor_id()));
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void aic_ipi_send_mask(struct irq_data *d, const struct cpumask *mask)
|
||
|
{
|
||
|
struct aic_irq_chip *ic = irq_data_get_irq_chip_data(d);
|
||
|
u32 irq_bit = BIT(irqd_to_hwirq(d));
|
||
|
u32 send = 0;
|
||
|
int cpu;
|
||
|
unsigned long pending;
|
||
|
|
||
|
for_each_cpu(cpu, mask) {
|
||
|
/*
|
||
|
* This sequence is the mirror of the one in aic_ipi_unmask();
|
||
|
* see the comment there. Additionally, release semantics
|
||
|
* ensure that the vIPI flag set is ordered after any shared
|
||
|
* memory accesses that precede it. This therefore also pairs
|
||
|
* with the atomic_fetch_andnot in aic_handle_ipi().
|
||
|
*/
|
||
|
pending = atomic_fetch_or_release(irq_bit, per_cpu_ptr(&aic_vipi_flag, cpu));
|
||
|
|
||
|
/*
|
||
|
* The atomic_fetch_or_release() above must complete before the
|
||
|
* atomic_read() below to avoid racing aic_ipi_unmask().
|
||
|
*/
|
||
|
smp_mb__after_atomic();
|
||
|
|
||
|
if (!(pending & irq_bit) &&
|
||
|
(atomic_read(per_cpu_ptr(&aic_vipi_enable, cpu)) & irq_bit)) {
|
||
|
if (static_branch_likely(&use_fast_ipi))
|
||
|
aic_ipi_send_fast(cpu);
|
||
|
else
|
||
|
send |= AIC_IPI_SEND_CPU(cpu);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* The flag writes must complete before the physical IPI is issued
|
||
|
* to another CPU. This is implied by the control dependency on
|
||
|
* the result of atomic_read_acquire() above, which is itself
|
||
|
* already ordered after the vIPI flag write.
|
||
|
*/
|
||
|
if (send)
|
||
|
aic_ic_write(ic, AIC_IPI_SEND, send);
|
||
|
}
|
||
|
|
||
|
static struct irq_chip ipi_chip = {
|
||
|
.name = "AIC-IPI",
|
||
|
.irq_mask = aic_ipi_mask,
|
||
|
.irq_unmask = aic_ipi_unmask,
|
||
|
.ipi_send_mask = aic_ipi_send_mask,
|
||
|
};
|
||
|
|
||
|
/*
|
||
|
* IPI IRQ domain
|
||
|
*/
|
||
|
|
||
|
static void aic_handle_ipi(struct pt_regs *regs)
|
||
|
{
|
||
|
int i;
|
||
|
unsigned long enabled, firing;
|
||
|
|
||
|
/*
|
||
|
* Ack the IPI. We need to order this after the AIC event read, but
|
||
|
* that is enforced by normal MMIO ordering guarantees.
|
||
|
*
|
||
|
* For the Fast IPI case, this needs to be ordered before the vIPI
|
||
|
* handling below, so we need to isb();
|
||
|
*/
|
||
|
if (static_branch_likely(&use_fast_ipi)) {
|
||
|
write_sysreg_s(IPI_SR_PENDING, SYS_IMP_APL_IPI_SR_EL1);
|
||
|
isb();
|
||
|
} else {
|
||
|
aic_ic_write(aic_irqc, AIC_IPI_ACK, AIC_IPI_OTHER);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* The mask read does not need to be ordered. Only we can change
|
||
|
* our own mask anyway, so no races are possible here, as long as
|
||
|
* we are properly in the interrupt handler (which is covered by
|
||
|
* the barrier that is part of the top-level AIC handler's readl()).
|
||
|
*/
|
||
|
enabled = atomic_read(this_cpu_ptr(&aic_vipi_enable));
|
||
|
|
||
|
/*
|
||
|
* Clear the IPIs we are about to handle. This pairs with the
|
||
|
* atomic_fetch_or_release() in aic_ipi_send_mask(), and needs to be
|
||
|
* ordered after the aic_ic_write() above (to avoid dropping vIPIs) and
|
||
|
* before IPI handling code (to avoid races handling vIPIs before they
|
||
|
* are signaled). The former is taken care of by the release semantics
|
||
|
* of the write portion, while the latter is taken care of by the
|
||
|
* acquire semantics of the read portion.
|
||
|
*/
|
||
|
firing = atomic_fetch_andnot(enabled, this_cpu_ptr(&aic_vipi_flag)) & enabled;
|
||
|
|
||
|
for_each_set_bit(i, &firing, AIC_NR_SWIPI)
|
||
|
generic_handle_domain_irq(aic_irqc->ipi_domain, i);
|
||
|
|
||
|
/*
|
||
|
* No ordering needed here; at worst this just changes the timing of
|
||
|
* when the next IPI will be delivered.
|
||
|
*/
|
||
|
if (!static_branch_likely(&use_fast_ipi))
|
||
|
aic_ic_write(aic_irqc, AIC_IPI_MASK_CLR, AIC_IPI_OTHER);
|
||
|
}
|
||
|
|
||
|
static int aic_ipi_alloc(struct irq_domain *d, unsigned int virq,
|
||
|
unsigned int nr_irqs, void *args)
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
for (i = 0; i < nr_irqs; i++) {
|
||
|
irq_set_percpu_devid(virq + i);
|
||
|
irq_domain_set_info(d, virq + i, i, &ipi_chip, d->host_data,
|
||
|
handle_percpu_devid_irq, NULL, NULL);
|
||
|
}
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static void aic_ipi_free(struct irq_domain *d, unsigned int virq, unsigned int nr_irqs)
|
||
|
{
|
||
|
/* Not freeing IPIs */
|
||
|
}
|
||
|
|
||
|
static const struct irq_domain_ops aic_ipi_domain_ops = {
|
||
|
.alloc = aic_ipi_alloc,
|
||
|
.free = aic_ipi_free,
|
||
|
};
|
||
|
|
||
|
static int __init aic_init_smp(struct aic_irq_chip *irqc, struct device_node *node)
|
||
|
{
|
||
|
struct irq_domain *ipi_domain;
|
||
|
int base_ipi;
|
||
|
|
||
|
ipi_domain = irq_domain_create_linear(irqc->hw_domain->fwnode, AIC_NR_SWIPI,
|
||
|
&aic_ipi_domain_ops, irqc);
|
||
|
if (WARN_ON(!ipi_domain))
|
||
|
return -ENODEV;
|
||
|
|
||
|
ipi_domain->flags |= IRQ_DOMAIN_FLAG_IPI_SINGLE;
|
||
|
irq_domain_update_bus_token(ipi_domain, DOMAIN_BUS_IPI);
|
||
|
|
||
|
base_ipi = __irq_domain_alloc_irqs(ipi_domain, -1, AIC_NR_SWIPI,
|
||
|
NUMA_NO_NODE, NULL, false, NULL);
|
||
|
|
||
|
if (WARN_ON(!base_ipi)) {
|
||
|
irq_domain_remove(ipi_domain);
|
||
|
return -ENODEV;
|
||
|
}
|
||
|
|
||
|
set_smp_ipi_range(base_ipi, AIC_NR_SWIPI);
|
||
|
|
||
|
irqc->ipi_domain = ipi_domain;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int aic_init_cpu(unsigned int cpu)
|
||
|
{
|
||
|
/* Mask all hard-wired per-CPU IRQ/FIQ sources */
|
||
|
|
||
|
/* Pending Fast IPI FIQs */
|
||
|
write_sysreg_s(IPI_SR_PENDING, SYS_IMP_APL_IPI_SR_EL1);
|
||
|
|
||
|
/* Timer FIQs */
|
||
|
sysreg_clear_set(cntp_ctl_el0, 0, ARCH_TIMER_CTRL_IT_MASK);
|
||
|
sysreg_clear_set(cntv_ctl_el0, 0, ARCH_TIMER_CTRL_IT_MASK);
|
||
|
|
||
|
/* EL2-only (VHE mode) IRQ sources */
|
||
|
if (is_kernel_in_hyp_mode()) {
|
||
|
/* Guest timers */
|
||
|
sysreg_clear_set_s(SYS_IMP_APL_VM_TMR_FIQ_ENA_EL2,
|
||
|
VM_TMR_FIQ_ENABLE_V | VM_TMR_FIQ_ENABLE_P, 0);
|
||
|
|
||
|
/* vGIC maintenance IRQ */
|
||
|
sysreg_clear_set_s(SYS_ICH_HCR_EL2, ICH_HCR_EN, 0);
|
||
|
}
|
||
|
|
||
|
/* PMC FIQ */
|
||
|
sysreg_clear_set_s(SYS_IMP_APL_PMCR0_EL1, PMCR0_IMODE | PMCR0_IACT,
|
||
|
FIELD_PREP(PMCR0_IMODE, PMCR0_IMODE_OFF));
|
||
|
|
||
|
/* Uncore PMC FIQ */
|
||
|
sysreg_clear_set_s(SYS_IMP_APL_UPMCR0_EL1, UPMCR0_IMODE,
|
||
|
FIELD_PREP(UPMCR0_IMODE, UPMCR0_IMODE_OFF));
|
||
|
|
||
|
/* Commit all of the above */
|
||
|
isb();
|
||
|
|
||
|
if (aic_irqc->info.version == 1) {
|
||
|
/*
|
||
|
* Make sure the kernel's idea of logical CPU order is the same as AIC's
|
||
|
* If we ever end up with a mismatch here, we will have to introduce
|
||
|
* a mapping table similar to what other irqchip drivers do.
|
||
|
*/
|
||
|
WARN_ON(aic_ic_read(aic_irqc, AIC_WHOAMI) != smp_processor_id());
|
||
|
|
||
|
/*
|
||
|
* Always keep IPIs unmasked at the hardware level (except auto-masking
|
||
|
* by AIC during processing). We manage masks at the vIPI level.
|
||
|
* These registers only exist on AICv1, AICv2 always uses fast IPIs.
|
||
|
*/
|
||
|
aic_ic_write(aic_irqc, AIC_IPI_ACK, AIC_IPI_SELF | AIC_IPI_OTHER);
|
||
|
if (static_branch_likely(&use_fast_ipi)) {
|
||
|
aic_ic_write(aic_irqc, AIC_IPI_MASK_SET, AIC_IPI_SELF | AIC_IPI_OTHER);
|
||
|
} else {
|
||
|
aic_ic_write(aic_irqc, AIC_IPI_MASK_SET, AIC_IPI_SELF);
|
||
|
aic_ic_write(aic_irqc, AIC_IPI_MASK_CLR, AIC_IPI_OTHER);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* Initialize the local mask state */
|
||
|
__this_cpu_write(aic_fiq_unmasked, 0);
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static struct gic_kvm_info vgic_info __initdata = {
|
||
|
.type = GIC_V3,
|
||
|
.no_maint_irq_mask = true,
|
||
|
.no_hw_deactivation = true,
|
||
|
};
|
||
|
|
||
|
static void build_fiq_affinity(struct aic_irq_chip *ic, struct device_node *aff)
|
||
|
{
|
||
|
int i, n;
|
||
|
u32 fiq;
|
||
|
|
||
|
if (of_property_read_u32(aff, "apple,fiq-index", &fiq) ||
|
||
|
WARN_ON(fiq >= AIC_NR_FIQ) || ic->fiq_aff[fiq])
|
||
|
return;
|
||
|
|
||
|
n = of_property_count_elems_of_size(aff, "cpus", sizeof(u32));
|
||
|
if (WARN_ON(n < 0))
|
||
|
return;
|
||
|
|
||
|
ic->fiq_aff[fiq] = kzalloc(sizeof(*ic->fiq_aff[fiq]), GFP_KERNEL);
|
||
|
if (!ic->fiq_aff[fiq])
|
||
|
return;
|
||
|
|
||
|
for (i = 0; i < n; i++) {
|
||
|
struct device_node *cpu_node;
|
||
|
u32 cpu_phandle;
|
||
|
int cpu;
|
||
|
|
||
|
if (of_property_read_u32_index(aff, "cpus", i, &cpu_phandle))
|
||
|
continue;
|
||
|
|
||
|
cpu_node = of_find_node_by_phandle(cpu_phandle);
|
||
|
if (WARN_ON(!cpu_node))
|
||
|
continue;
|
||
|
|
||
|
cpu = of_cpu_node_to_id(cpu_node);
|
||
|
of_node_put(cpu_node);
|
||
|
if (WARN_ON(cpu < 0))
|
||
|
continue;
|
||
|
|
||
|
cpumask_set_cpu(cpu, &ic->fiq_aff[fiq]->aff);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static int __init aic_of_ic_init(struct device_node *node, struct device_node *parent)
|
||
|
{
|
||
|
int i, die;
|
||
|
u32 off, start_off;
|
||
|
void __iomem *regs;
|
||
|
struct aic_irq_chip *irqc;
|
||
|
struct device_node *affs;
|
||
|
const struct of_device_id *match;
|
||
|
|
||
|
regs = of_iomap(node, 0);
|
||
|
if (WARN_ON(!regs))
|
||
|
return -EIO;
|
||
|
|
||
|
irqc = kzalloc(sizeof(*irqc), GFP_KERNEL);
|
||
|
if (!irqc) {
|
||
|
iounmap(regs);
|
||
|
return -ENOMEM;
|
||
|
}
|
||
|
|
||
|
irqc->base = regs;
|
||
|
|
||
|
match = of_match_node(aic_info_match, node);
|
||
|
if (!match)
|
||
|
goto err_unmap;
|
||
|
|
||
|
irqc->info = *(struct aic_info *)match->data;
|
||
|
|
||
|
aic_irqc = irqc;
|
||
|
|
||
|
switch (irqc->info.version) {
|
||
|
case 1: {
|
||
|
u32 info;
|
||
|
|
||
|
info = aic_ic_read(irqc, AIC_INFO);
|
||
|
irqc->nr_irq = FIELD_GET(AIC_INFO_NR_IRQ, info);
|
||
|
irqc->max_irq = AIC_MAX_IRQ;
|
||
|
irqc->nr_die = irqc->max_die = 1;
|
||
|
|
||
|
off = start_off = irqc->info.target_cpu;
|
||
|
off += sizeof(u32) * irqc->max_irq; /* TARGET_CPU */
|
||
|
|
||
|
irqc->event = irqc->base;
|
||
|
|
||
|
break;
|
||
|
}
|
||
|
case 2: {
|
||
|
u32 info1, info3;
|
||
|
|
||
|
info1 = aic_ic_read(irqc, AIC2_INFO1);
|
||
|
info3 = aic_ic_read(irqc, AIC2_INFO3);
|
||
|
|
||
|
irqc->nr_irq = FIELD_GET(AIC2_INFO1_NR_IRQ, info1);
|
||
|
irqc->max_irq = FIELD_GET(AIC2_INFO3_MAX_IRQ, info3);
|
||
|
irqc->nr_die = FIELD_GET(AIC2_INFO1_LAST_DIE, info1) + 1;
|
||
|
irqc->max_die = FIELD_GET(AIC2_INFO3_MAX_DIE, info3);
|
||
|
|
||
|
off = start_off = irqc->info.irq_cfg;
|
||
|
off += sizeof(u32) * irqc->max_irq; /* IRQ_CFG */
|
||
|
|
||
|
irqc->event = of_iomap(node, 1);
|
||
|
if (WARN_ON(!irqc->event))
|
||
|
goto err_unmap;
|
||
|
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
irqc->info.sw_set = off;
|
||
|
off += sizeof(u32) * (irqc->max_irq >> 5); /* SW_SET */
|
||
|
irqc->info.sw_clr = off;
|
||
|
off += sizeof(u32) * (irqc->max_irq >> 5); /* SW_CLR */
|
||
|
irqc->info.mask_set = off;
|
||
|
off += sizeof(u32) * (irqc->max_irq >> 5); /* MASK_SET */
|
||
|
irqc->info.mask_clr = off;
|
||
|
off += sizeof(u32) * (irqc->max_irq >> 5); /* MASK_CLR */
|
||
|
off += sizeof(u32) * (irqc->max_irq >> 5); /* HW_STATE */
|
||
|
|
||
|
if (irqc->info.fast_ipi)
|
||
|
static_branch_enable(&use_fast_ipi);
|
||
|
else
|
||
|
static_branch_disable(&use_fast_ipi);
|
||
|
|
||
|
irqc->info.die_stride = off - start_off;
|
||
|
|
||
|
irqc->hw_domain = irq_domain_create_tree(of_node_to_fwnode(node),
|
||
|
&aic_irq_domain_ops, irqc);
|
||
|
if (WARN_ON(!irqc->hw_domain))
|
||
|
goto err_unmap;
|
||
|
|
||
|
irq_domain_update_bus_token(irqc->hw_domain, DOMAIN_BUS_WIRED);
|
||
|
|
||
|
if (aic_init_smp(irqc, node))
|
||
|
goto err_remove_domain;
|
||
|
|
||
|
affs = of_get_child_by_name(node, "affinities");
|
||
|
if (affs) {
|
||
|
struct device_node *chld;
|
||
|
|
||
|
for_each_child_of_node(affs, chld)
|
||
|
build_fiq_affinity(irqc, chld);
|
||
|
}
|
||
|
of_node_put(affs);
|
||
|
|
||
|
set_handle_irq(aic_handle_irq);
|
||
|
set_handle_fiq(aic_handle_fiq);
|
||
|
|
||
|
off = 0;
|
||
|
for (die = 0; die < irqc->nr_die; die++) {
|
||
|
for (i = 0; i < BITS_TO_U32(irqc->nr_irq); i++)
|
||
|
aic_ic_write(irqc, irqc->info.mask_set + off + i * 4, U32_MAX);
|
||
|
for (i = 0; i < BITS_TO_U32(irqc->nr_irq); i++)
|
||
|
aic_ic_write(irqc, irqc->info.sw_clr + off + i * 4, U32_MAX);
|
||
|
if (irqc->info.target_cpu)
|
||
|
for (i = 0; i < irqc->nr_irq; i++)
|
||
|
aic_ic_write(irqc, irqc->info.target_cpu + off + i * 4, 1);
|
||
|
off += irqc->info.die_stride;
|
||
|
}
|
||
|
|
||
|
if (irqc->info.version == 2) {
|
||
|
u32 config = aic_ic_read(irqc, AIC2_CONFIG);
|
||
|
|
||
|
config |= AIC2_CONFIG_ENABLE;
|
||
|
aic_ic_write(irqc, AIC2_CONFIG, config);
|
||
|
}
|
||
|
|
||
|
if (!is_kernel_in_hyp_mode())
|
||
|
pr_info("Kernel running in EL1, mapping interrupts");
|
||
|
|
||
|
if (static_branch_likely(&use_fast_ipi))
|
||
|
pr_info("Using Fast IPIs");
|
||
|
|
||
|
cpuhp_setup_state(CPUHP_AP_IRQ_APPLE_AIC_STARTING,
|
||
|
"irqchip/apple-aic/ipi:starting",
|
||
|
aic_init_cpu, NULL);
|
||
|
|
||
|
vgic_set_kvm_info(&vgic_info);
|
||
|
|
||
|
pr_info("Initialized with %d/%d IRQs * %d/%d die(s), %d FIQs, %d vIPIs",
|
||
|
irqc->nr_irq, irqc->max_irq, irqc->nr_die, irqc->max_die, AIC_NR_FIQ, AIC_NR_SWIPI);
|
||
|
|
||
|
return 0;
|
||
|
|
||
|
err_remove_domain:
|
||
|
irq_domain_remove(irqc->hw_domain);
|
||
|
err_unmap:
|
||
|
if (irqc->event && irqc->event != irqc->base)
|
||
|
iounmap(irqc->event);
|
||
|
iounmap(irqc->base);
|
||
|
kfree(irqc);
|
||
|
return -ENODEV;
|
||
|
}
|
||
|
|
||
|
IRQCHIP_DECLARE(apple_aic, "apple,aic", aic_of_ic_init);
|
||
|
IRQCHIP_DECLARE(apple_aic2, "apple,aic2", aic_of_ic_init);
|