[mirror_ubuntu-bionic-kernel.git] / drivers / irqchip / irq-bcm6345-l1.c

/*
 * Broadcom BCM6345 style Level 1 interrupt controller driver
 *
 * Copyright (C) 2014 Broadcom Corporation
 * Copyright 2015 Simon Arlott
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * 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/of_platform.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 {
	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_chip *intc = irq_desc_get_handler_data(desc);
	struct bcm6345_l1_cpu *cpu;
	struct irq_chip *chip = irq_desc_get_chip(desc);
	unsigned int idx;

#ifdef CONFIG_SMP
	cpu = intc->cpus[cpu_logical_map(smp_processor_id())];
#else
	cpu = intc->cpus[0];
#endif

	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;
		unsigned int irq;

		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) {
			irq = irq_linear_revmap(intc->domain, base + hwirq);
			if (irq)
				do_IRQ(irq);
			else
				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;
	struct cpumask valid;
	unsigned long flags;
	bool enabled;

	if (!cpumask_and(&valid, &intc->cpumask, dest))
		return -EINVAL;

	new_cpu = cpumask_any_and(&valid, 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);
		cpumask_copy(irq_data_get_affinity_mask(d), dest);
		if (enabled)
			__bcm6345_l1_unmask(d);
	} else {
		cpumask_copy(irq_data_get_affinity_mask(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(sizeof(*cpu) + n_words * sizeof(u32),
					GFP_KERNEL);
	if (!cpu)
		return -ENOMEM;

	cpu->map_base = ioremap(res.start, sz);
	if (!cpu->map_base)
		return -ENOMEM;

	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, intc);

	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_weight(&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 at MMIO 0x%p (irq = %d)\n", idx,
				cpu->map_base, 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);
Commit	Line	Data
c7c42ec2 SA	1	/*
	2	* Broadcom BCM6345 style Level 1 interrupt controller driver
	3	*
	4	* Copyright (C) 2014 Broadcom Corporation
	5	* Copyright 2015 Simon Arlott
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*
	11	* This is based on the BCM7038 (which supports SMP) but with a single
	12	* enable register instead of separate mask/set/clear registers.
	13	*
	14	* The BCM3380 has a similar mask/status register layout, but each pair
	15	* of words is at separate locations (and SMP is not supported).
	16	*
	17	* ENABLE/STATUS words are packed next to each other for each CPU:
	18	*
	19	* BCM6368:
	20	* 0x1000_0020: CPU0_W0_ENABLE
	21	* 0x1000_0024: CPU0_W1_ENABLE
	22	* 0x1000_0028: CPU0_W0_STATUS IRQs 31-63
	23	* 0x1000_002c: CPU0_W1_STATUS IRQs 0-31
	24	* 0x1000_0030: CPU1_W0_ENABLE
	25	* 0x1000_0034: CPU1_W1_ENABLE
	26	* 0x1000_0038: CPU1_W0_STATUS IRQs 31-63
	27	* 0x1000_003c: CPU1_W1_STATUS IRQs 0-31
	28	*
	29	* BCM63168:
	30	* 0x1000_0020: CPU0_W0_ENABLE
	31	* 0x1000_0024: CPU0_W1_ENABLE
	32	* 0x1000_0028: CPU0_W2_ENABLE
	33	* 0x1000_002c: CPU0_W3_ENABLE
	34	* 0x1000_0030: CPU0_W0_STATUS IRQs 96-127
	35	* 0x1000_0034: CPU0_W1_STATUS IRQs 64-95
	36	* 0x1000_0038: CPU0_W2_STATUS IRQs 32-63
	37	* 0x1000_003c: CPU0_W3_STATUS IRQs 0-31
	38	* 0x1000_0040: CPU1_W0_ENABLE
	39	* 0x1000_0044: CPU1_W1_ENABLE
	40	* 0x1000_0048: CPU1_W2_ENABLE
	41	* 0x1000_004c: CPU1_W3_ENABLE
	42	* 0x1000_0050: CPU1_W0_STATUS IRQs 96-127
	43	* 0x1000_0054: CPU1_W1_STATUS IRQs 64-95
	44	* 0x1000_0058: CPU1_W2_STATUS IRQs 32-63
	45	* 0x1000_005c: CPU1_W3_STATUS IRQs 0-31
	46	*
	47	* IRQs are numbered in CPU native endian order
	48	* (which is big-endian in these examples)
	49	*/
	50
	51	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	52
	53	#include <linux/bitops.h>
	54	#include <linux/cpumask.h>
c7c42ec2 SA	55	#include <linux/kernel.h>
	56	#include <linux/init.h>
	57	#include <linux/interrupt.h>
	58	#include <linux/io.h>
	59	#include <linux/ioport.h>
	60	#include <linux/irq.h>
	61	#include <linux/irqdomain.h>
	62	#include <linux/module.h>
	63	#include <linux/of.h>
	64	#include <linux/of_irq.h>
	65	#include <linux/of_address.h>
	66	#include <linux/of_platform.h>
	67	#include <linux/platform_device.h>
	68	#include <linux/slab.h>
	69	#include <linux/smp.h>
	70	#include <linux/types.h>
	71	#include <linux/irqchip.h>
	72	#include <linux/irqchip/chained_irq.h>
	73
	74	#define IRQS_PER_WORD 32
	75	#define REG_BYTES_PER_IRQ_WORD (sizeof(u32) * 2)
	76
	77	struct bcm6345_l1_cpu;
	78
	79	struct bcm6345_l1_chip {
	80	raw_spinlock_t lock;
	81	unsigned int n_words;
	82	struct irq_domain *domain;
	83	struct cpumask cpumask;
	84	struct bcm6345_l1_cpu *cpus[NR_CPUS];
	85	};
	86
	87	struct bcm6345_l1_cpu {
	88	void __iomem *map_base;
	89	unsigned int parent_irq;
	90	u32 enable_cache[];
	91	};
	92
	93	static inline unsigned int reg_enable(struct bcm6345_l1_chip *intc,
	94	unsigned int word)
	95	{
	96	#ifdef __BIG_ENDIAN
	97	return (1 * intc->n_words - word - 1) * sizeof(u32);
	98	#else
	99	return (0 * intc->n_words + word) * sizeof(u32);
	100	#endif
	101	}
	102
	103	static inline unsigned int reg_status(struct bcm6345_l1_chip *intc,
	104	unsigned int word)
	105	{
	106	#ifdef __BIG_ENDIAN
	107	return (2 * intc->n_words - word - 1) * sizeof(u32);
	108	#else
	109	return (1 * intc->n_words + word) * sizeof(u32);
	110	#endif
	111	}
	112
	113	static inline unsigned int cpu_for_irq(struct bcm6345_l1_chip *intc,
	114	struct irq_data *d)
	115	{
	116	return cpumask_first_and(&intc->cpumask, irq_data_get_affinity_mask(d));
	117	}
	118
119	static void bcm6345_l1_irq_handle(struct irq_desc *desc)
120	{
121	struct bcm6345_l1_chip *intc = irq_desc_get_handler_data(desc);
122	struct bcm6345_l1_cpu *cpu;
123	struct irq_chip *chip = irq_desc_get_chip(desc);
124	unsigned int idx;
125
126	#ifdef CONFIG_SMP
127	cpu = intc->cpus[cpu_logical_map(smp_processor_id())];
128	#else
129	cpu = intc->cpus[0];
130	#endif
131
132	chained_irq_enter(chip, desc);
133
134	for (idx = 0; idx < intc->n_words; idx++) {
135	int base = idx * IRQS_PER_WORD;
136	unsigned long pending;
137	irq_hw_number_t hwirq;
138	unsigned int irq;
139
140	pending = __raw_readl(cpu->map_base + reg_status(intc, idx));
141	pending &= __raw_readl(cpu->map_base + reg_enable(intc, idx));
142
143	for_each_set_bit(hwirq, &pending, IRQS_PER_WORD) {
144	irq = irq_linear_revmap(intc->domain, base + hwirq);
145	if (irq)
146	do_IRQ(irq);
147	else
148	spurious_interrupt();
149	}
150	}
151
152	chained_irq_exit(chip, desc);
153	}
154
155	static inline void __bcm6345_l1_unmask(struct irq_data *d)
156	{
157	struct bcm6345_l1_chip *intc = irq_data_get_irq_chip_data(d);
158	u32 word = d->hwirq / IRQS_PER_WORD;
159	u32 mask = BIT(d->hwirq % IRQS_PER_WORD);
160	unsigned int cpu_idx = cpu_for_irq(intc, d);
161
162	intc->cpus[cpu_idx]->enable_cache[word] \|= mask;
163	__raw_writel(intc->cpus[cpu_idx]->enable_cache[word],
164	intc->cpus[cpu_idx]->map_base + reg_enable(intc, word));
165	}
166
167	static inline void __bcm6345_l1_mask(struct irq_data *d)
168	{
169	struct bcm6345_l1_chip *intc = irq_data_get_irq_chip_data(d);
170	u32 word = d->hwirq / IRQS_PER_WORD;
171	u32 mask = BIT(d->hwirq % IRQS_PER_WORD);
172	unsigned int cpu_idx = cpu_for_irq(intc, d);
173
174	intc->cpus[cpu_idx]->enable_cache[word] &= ~mask;
175	__raw_writel(intc->cpus[cpu_idx]->enable_cache[word],
176	intc->cpus[cpu_idx]->map_base + reg_enable(intc, word));
177	}
178
179	static void bcm6345_l1_unmask(struct irq_data *d)
180	{
181	struct bcm6345_l1_chip *intc = irq_data_get_irq_chip_data(d);
182	unsigned long flags;
183
184	raw_spin_lock_irqsave(&intc->lock, flags);
185	__bcm6345_l1_unmask(d);
186	raw_spin_unlock_irqrestore(&intc->lock, flags);
187	}
188
189	static void bcm6345_l1_mask(struct irq_data *d)
190	{
191	struct bcm6345_l1_chip *intc = irq_data_get_irq_chip_data(d);
192	unsigned long flags;
193
194	raw_spin_lock_irqsave(&intc->lock, flags);
195	__bcm6345_l1_mask(d);
196	raw_spin_unlock_irqrestore(&intc->lock, flags);
197	}
198
199	static int bcm6345_l1_set_affinity(struct irq_data *d,
200	const struct cpumask *dest,
201	bool force)
202	{
203	struct bcm6345_l1_chip *intc = irq_data_get_irq_chip_data(d);
204	u32 word = d->hwirq / IRQS_PER_WORD;
205	u32 mask = BIT(d->hwirq % IRQS_PER_WORD);
206	unsigned int old_cpu = cpu_for_irq(intc, d);
207	unsigned int new_cpu;
208	struct cpumask valid;
209	unsigned long flags;
210	bool enabled;
211
212	if (!cpumask_and(&valid, &intc->cpumask, dest))
213	return -EINVAL;
214
215	new_cpu = cpumask_any_and(&valid, cpu_online_mask);
216	if (new_cpu >= nr_cpu_ids)
217	return -EINVAL;
218
219	dest = cpumask_of(new_cpu);
220
221	raw_spin_lock_irqsave(&intc->lock, flags);
222	if (old_cpu != new_cpu) {
223	enabled = intc->cpus[old_cpu]->enable_cache[word] & mask;
224	if (enabled)
225	__bcm6345_l1_mask(d);
226	cpumask_copy(irq_data_get_affinity_mask(d), dest);
227	if (enabled)
228	__bcm6345_l1_unmask(d);
229	} else {
230	cpumask_copy(irq_data_get_affinity_mask(d), dest);
231	}
232	raw_spin_unlock_irqrestore(&intc->lock, flags);
233
d0ed5e8e MZ	234	irq_data_update_effective_affinity(d, cpumask_of(new_cpu));
d0ed5e8e MZ	235
c7c42ec2 SA	236	return IRQ_SET_MASK_OK_NOCOPY;
	237	}
	238
	239	static int __init bcm6345_l1_init_one(struct device_node *dn,
	240	unsigned int idx,
	241	struct bcm6345_l1_chip *intc)
	242	{
	243	struct resource res;
	244	resource_size_t sz;
	245	struct bcm6345_l1_cpu *cpu;
	246	unsigned int i, n_words;
	247
	248	if (of_address_to_resource(dn, idx, &res))
	249	return -EINVAL;
	250	sz = resource_size(&res);
	251	n_words = sz / REG_BYTES_PER_IRQ_WORD;
	252
	253	if (!intc->n_words)
	254	intc->n_words = n_words;
	255	else if (intc->n_words != n_words)
	256	return -EINVAL;
	257
	258	cpu = intc->cpus[idx] = kzalloc(sizeof(cpu) + n_words sizeof(u32),
	259	GFP_KERNEL);
	260	if (!cpu)
	261	return -ENOMEM;
	262
	263	cpu->map_base = ioremap(res.start, sz);
	264	if (!cpu->map_base)
	265	return -ENOMEM;
	266
	267	for (i = 0; i < n_words; i++) {
	268	cpu->enable_cache[i] = 0;
	269	__raw_writel(0, cpu->map_base + reg_enable(intc, i));
	270	}
	271
	272	cpu->parent_irq = irq_of_parse_and_map(dn, idx);
	273	if (!cpu->parent_irq) {
	274	pr_err("failed to map parent interrupt %d\n", cpu->parent_irq);
	275	return -EINVAL;
	276	}
	277	irq_set_chained_handler_and_data(cpu->parent_irq,
	278	bcm6345_l1_irq_handle, intc);
	279
	280	return 0;
	281	}
	282
	283	static struct irq_chip bcm6345_l1_irq_chip = {
	284	.name = "bcm6345-l1",
	285	.irq_mask = bcm6345_l1_mask,
	286	.irq_unmask = bcm6345_l1_unmask,
	287	.irq_set_affinity = bcm6345_l1_set_affinity,
	288	};
	289
	290	static int bcm6345_l1_map(struct irq_domain *d, unsigned int virq,
	291	irq_hw_number_t hw_irq)
	292	{
	293	irq_set_chip_and_handler(virq,
	294	&bcm6345_l1_irq_chip, handle_percpu_irq);
	295	irq_set_chip_data(virq, d->host_data);
d0ed5e8e	296	irqd_set_single_target(irq_desc_get_irq_data(irq_to_desc(virq)));
c7c42ec2 SA	297	return 0;
	298	}
	299
	300	static const struct irq_domain_ops bcm6345_l1_domain_ops = {
	301	.xlate = irq_domain_xlate_onecell,
	302	.map = bcm6345_l1_map,
	303	};
	304
	305	static int __init bcm6345_l1_of_init(struct device_node *dn,
	306	struct device_node *parent)
	307	{
	308	struct bcm6345_l1_chip *intc;
	309	unsigned int idx;
	310	int ret;
	311
	312	intc = kzalloc(sizeof(*intc), GFP_KERNEL);
	313	if (!intc)
	314	return -ENOMEM;
	315
	316	for_each_possible_cpu(idx) {
	317	ret = bcm6345_l1_init_one(dn, idx, intc);
	318	if (ret)
	319	pr_err("failed to init intc L1 for cpu %d: %d\n",
	320	idx, ret);
	321	else
	322	cpumask_set_cpu(idx, &intc->cpumask);
	323	}
	324
	325	if (!cpumask_weight(&intc->cpumask)) {
	326	ret = -ENODEV;
	327	goto out_free;
	328	}
	329
	330	raw_spin_lock_init(&intc->lock);
	331
	332	intc->domain = irq_domain_add_linear(dn, IRQS_PER_WORD * intc->n_words,
	333	&bcm6345_l1_domain_ops,
	334	intc);
	335	if (!intc->domain) {
	336	ret = -ENOMEM;
	337	goto out_unmap;
	338	}
	339
	340	pr_info("registered BCM6345 L1 intc (IRQs: %d)\n",
	341	IRQS_PER_WORD * intc->n_words);
	342	for_each_cpu(idx, &intc->cpumask) {
	343	struct bcm6345_l1_cpu *cpu = intc->cpus[idx];
	344
	345	pr_info(" CPU%u at MMIO 0x%p (irq = %d)\n", idx,
	346	cpu->map_base, cpu->parent_irq);
	347	}
	348
	349	return 0;
	350
	351	out_unmap:
	352	for_each_possible_cpu(idx) {
	353	struct bcm6345_l1_cpu *cpu = intc->cpus[idx];
	354
	355	if (cpu) {
	356	if (cpu->map_base)
	357	iounmap(cpu->map_base);
	358	kfree(cpu);
	359	}
	360	}
361	out_free:
362	kfree(intc);
363	return ret;
364	}
365
366	IRQCHIP_DECLARE(bcm6345_l1, "brcm,bcm6345-l1-intc", bcm6345_l1_of_init);