| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Simon Arlott | 1470 | 95.21% | 1 | 8.33% |
| Marc Zyngier | 21 | 1.36% | 1 | 8.33% |
| Jonas Gorski | 19 | 1.23% | 1 | 8.33% |
| Álvaro Fernández Rojas | 16 | 1.04% | 1 | 8.33% |
| Erick Archer | 4 | 0.26% | 1 | 8.33% |
| Mark Rutland | 3 | 0.19% | 1 | 8.33% |
| Dawei Li | 3 | 0.19% | 1 | 8.33% |
| Thomas Gleixner | 2 | 0.13% | 1 | 8.33% |
| Samuel Holland | 2 | 0.13% | 1 | 8.33% |
| Kevin Cernekee | 2 | 0.13% | 1 | 8.33% |
| Joël Porquet | 1 | 0.06% | 1 | 8.33% |
| Yury Norov | 1 | 0.06% | 1 | 8.33% |
| Total | 1544 | 12 |
// SPDX-License-Identifier: GPL-2.0-only /* * Broadcom BCM6345 style Level 1 interrupt controller driver * * Copyright (C) 2014 Broadcom Corporation * Copyright 2015 Simon Arlott * * This is based on the BCM7038 (which supports SMP) but with a single * enable register instead of separate mask/set/clear registers. * * The BCM3380 has a similar mask/status register layout, but each pair * of words is at separate locations (and SMP is not supported). * * ENABLE/STATUS words are packed next to each other for each CPU: * * BCM6368: * 0x1000_0020: CPU0_W0_ENABLE * 0x1000_0024: CPU0_W1_ENABLE * 0x1000_0028: CPU0_W0_STATUS IRQs 31-63 * 0x1000_002c: CPU0_W1_STATUS IRQs 0-31 * 0x1000_0030: CPU1_W0_ENABLE * 0x1000_0034: CPU1_W1_ENABLE * 0x1000_0038: CPU1_W0_STATUS IRQs 31-63 * 0x1000_003c: CPU1_W1_STATUS IRQs 0-31 * * BCM63168: * 0x1000_0020: CPU0_W0_ENABLE * 0x1000_0024: CPU0_W1_ENABLE * 0x1000_0028: CPU0_W2_ENABLE * 0x1000_002c: CPU0_W3_ENABLE * 0x1000_0030: CPU0_W0_STATUS IRQs 96-127 * 0x1000_0034: CPU0_W1_STATUS IRQs 64-95 * 0x1000_0038: CPU0_W2_STATUS IRQs 32-63 * 0x1000_003c: CPU0_W3_STATUS IRQs 0-31 * 0x1000_0040: CPU1_W0_ENABLE * 0x1000_0044: CPU1_W1_ENABLE * 0x1000_0048: CPU1_W2_ENABLE * 0x1000_004c: CPU1_W3_ENABLE * 0x1000_0050: CPU1_W0_STATUS IRQs 96-127 * 0x1000_0054: CPU1_W1_STATUS IRQs 64-95 * 0x1000_0058: CPU1_W2_STATUS IRQs 32-63 * 0x1000_005c: CPU1_W3_STATUS IRQs 0-31 * * IRQs are numbered in CPU native endian order * (which is big-endian in these examples) */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/bitops.h> #include <linux/cpumask.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/ioport.h> #include <linux/irq.h> #include <linux/irqdomain.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_irq.h> #include <linux/of_address.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/smp.h> #include <linux/types.h> #include <linux/irqchip.h> #include <linux/irqchip/chained_irq.h> #define IRQS_PER_WORD 32 #define REG_BYTES_PER_IRQ_WORD (sizeof(u32) * 2) struct bcm6345_l1_cpu; struct bcm6345_l1_chip { raw_spinlock_t lock; unsigned int n_words; struct irq_domain *domain; struct cpumask cpumask; struct bcm6345_l1_cpu *cpus[NR_CPUS]; }; struct bcm6345_l1_cpu { struct bcm6345_l1_chip *intc; void __iomem *map_base; unsigned int parent_irq; u32 enable_cache[]; }; static inline unsigned int reg_enable(struct bcm6345_l1_chip *intc, unsigned int word) { #ifdef __BIG_ENDIAN return (1 * intc->n_words - word - 1) * sizeof(u32); #else return (0 * intc->n_words + word) * sizeof(u32); #endif } static inline unsigned int reg_status(struct bcm6345_l1_chip *intc, unsigned int word) { #ifdef __BIG_ENDIAN return (2 * intc->n_words - word - 1) * sizeof(u32); #else return (1 * intc->n_words + word) * sizeof(u32); #endif } static inline unsigned int cpu_for_irq(struct bcm6345_l1_chip *intc, struct irq_data *d) { return cpumask_first_and(&intc->cpumask, irq_data_get_affinity_mask(d)); } static void bcm6345_l1_irq_handle(struct irq_desc *desc) { struct bcm6345_l1_cpu *cpu = irq_desc_get_handler_data(desc); struct bcm6345_l1_chip *intc = cpu->intc; struct irq_chip *chip = irq_desc_get_chip(desc); unsigned int idx; chained_irq_enter(chip, desc); for (idx = 0; idx < intc->n_words; idx++) { int base = idx * IRQS_PER_WORD; unsigned long pending; irq_hw_number_t hwirq; pending = __raw_readl(cpu->map_base + reg_status(intc, idx)); pending &= __raw_readl(cpu->map_base + reg_enable(intc, idx)); for_each_set_bit(hwirq, &pending, IRQS_PER_WORD) { if (generic_handle_domain_irq(intc->domain, base + hwirq)) spurious_interrupt(); } } chained_irq_exit(chip, desc); } static inline void __bcm6345_l1_unmask(struct irq_data *d) { struct bcm6345_l1_chip *intc = irq_data_get_irq_chip_data(d); u32 word = d->hwirq / IRQS_PER_WORD; u32 mask = BIT(d->hwirq % IRQS_PER_WORD); unsigned int cpu_idx = cpu_for_irq(intc, d); intc->cpus[cpu_idx]->enable_cache[word] |= mask; __raw_writel(intc->cpus[cpu_idx]->enable_cache[word], intc->cpus[cpu_idx]->map_base + reg_enable(intc, word)); } static inline void __bcm6345_l1_mask(struct irq_data *d) { struct bcm6345_l1_chip *intc = irq_data_get_irq_chip_data(d); u32 word = d->hwirq / IRQS_PER_WORD; u32 mask = BIT(d->hwirq % IRQS_PER_WORD); unsigned int cpu_idx = cpu_for_irq(intc, d); intc->cpus[cpu_idx]->enable_cache[word] &= ~mask; __raw_writel(intc->cpus[cpu_idx]->enable_cache[word], intc->cpus[cpu_idx]->map_base + reg_enable(intc, word)); } static void bcm6345_l1_unmask(struct irq_data *d) { struct bcm6345_l1_chip *intc = irq_data_get_irq_chip_data(d); unsigned long flags; raw_spin_lock_irqsave(&intc->lock, flags); __bcm6345_l1_unmask(d); raw_spin_unlock_irqrestore(&intc->lock, flags); } static void bcm6345_l1_mask(struct irq_data *d) { struct bcm6345_l1_chip *intc = irq_data_get_irq_chip_data(d); unsigned long flags; raw_spin_lock_irqsave(&intc->lock, flags); __bcm6345_l1_mask(d); raw_spin_unlock_irqrestore(&intc->lock, flags); } static int bcm6345_l1_set_affinity(struct irq_data *d, const struct cpumask *dest, bool force) { struct bcm6345_l1_chip *intc = irq_data_get_irq_chip_data(d); u32 word = d->hwirq / IRQS_PER_WORD; u32 mask = BIT(d->hwirq % IRQS_PER_WORD); unsigned int old_cpu = cpu_for_irq(intc, d); unsigned int new_cpu; unsigned long flags; bool enabled; new_cpu = cpumask_first_and_and(&intc->cpumask, dest, cpu_online_mask); if (new_cpu >= nr_cpu_ids) return -EINVAL; dest = cpumask_of(new_cpu); raw_spin_lock_irqsave(&intc->lock, flags); if (old_cpu != new_cpu) { enabled = intc->cpus[old_cpu]->enable_cache[word] & mask; if (enabled) __bcm6345_l1_mask(d); irq_data_update_affinity(d, dest); if (enabled) __bcm6345_l1_unmask(d); } else { irq_data_update_affinity(d, dest); } raw_spin_unlock_irqrestore(&intc->lock, flags); irq_data_update_effective_affinity(d, cpumask_of(new_cpu)); return IRQ_SET_MASK_OK_NOCOPY; } static int __init bcm6345_l1_init_one(struct device_node *dn, unsigned int idx, struct bcm6345_l1_chip *intc) { struct resource res; resource_size_t sz; struct bcm6345_l1_cpu *cpu; unsigned int i, n_words; if (of_address_to_resource(dn, idx, &res)) return -EINVAL; sz = resource_size(&res); n_words = sz / REG_BYTES_PER_IRQ_WORD; if (!intc->n_words) intc->n_words = n_words; else if (intc->n_words != n_words) return -EINVAL; cpu = intc->cpus[idx] = kzalloc(struct_size(cpu, enable_cache, n_words), GFP_KERNEL); if (!cpu) return -ENOMEM; cpu->intc = intc; cpu->map_base = ioremap(res.start, sz); if (!cpu->map_base) return -ENOMEM; if (!request_mem_region(res.start, sz, res.name)) pr_err("failed to request intc memory"); for (i = 0; i < n_words; i++) { cpu->enable_cache[i] = 0; __raw_writel(0, cpu->map_base + reg_enable(intc, i)); } cpu->parent_irq = irq_of_parse_and_map(dn, idx); if (!cpu->parent_irq) { pr_err("failed to map parent interrupt %d\n", cpu->parent_irq); return -EINVAL; } irq_set_chained_handler_and_data(cpu->parent_irq, bcm6345_l1_irq_handle, cpu); return 0; } static struct irq_chip bcm6345_l1_irq_chip = { .name = "bcm6345-l1", .irq_mask = bcm6345_l1_mask, .irq_unmask = bcm6345_l1_unmask, .irq_set_affinity = bcm6345_l1_set_affinity, }; static int bcm6345_l1_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw_irq) { irq_set_chip_and_handler(virq, &bcm6345_l1_irq_chip, handle_percpu_irq); irq_set_chip_data(virq, d->host_data); irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(virq))); return 0; } static const struct irq_domain_ops bcm6345_l1_domain_ops = { .xlate = irq_domain_xlate_onecell, .map = bcm6345_l1_map, }; static int __init bcm6345_l1_of_init(struct device_node *dn, struct device_node *parent) { struct bcm6345_l1_chip *intc; unsigned int idx; int ret; intc = kzalloc(sizeof(*intc), GFP_KERNEL); if (!intc) return -ENOMEM; for_each_possible_cpu(idx) { ret = bcm6345_l1_init_one(dn, idx, intc); if (ret) pr_err("failed to init intc L1 for cpu %d: %d\n", idx, ret); else cpumask_set_cpu(idx, &intc->cpumask); } if (cpumask_empty(&intc->cpumask)) { ret = -ENODEV; goto out_free; } raw_spin_lock_init(&intc->lock); intc->domain = irq_domain_add_linear(dn, IRQS_PER_WORD * intc->n_words, &bcm6345_l1_domain_ops, intc); if (!intc->domain) { ret = -ENOMEM; goto out_unmap; } pr_info("registered BCM6345 L1 intc (IRQs: %d)\n", IRQS_PER_WORD * intc->n_words); for_each_cpu(idx, &intc->cpumask) { struct bcm6345_l1_cpu *cpu = intc->cpus[idx]; pr_info(" CPU%u (irq = %d)\n", idx, cpu->parent_irq); } return 0; out_unmap: for_each_possible_cpu(idx) { struct bcm6345_l1_cpu *cpu = intc->cpus[idx]; if (cpu) { if (cpu->map_base) iounmap(cpu->map_base); kfree(cpu); } } out_free: kfree(intc); return ret; } IRQCHIP_DECLARE(bcm6345_l1, "brcm,bcm6345-l1-intc", bcm6345_l1_of_init);
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