2343 строки
56 KiB
C
2343 строки
56 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2004-2014 Cavium, Inc.
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*/
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#include <linux/of_address.h>
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#include <linux/interrupt.h>
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#include <linux/irqdomain.h>
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#include <linux/bitops.h>
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#include <linux/of_irq.h>
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#include <linux/percpu.h>
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#include <linux/slab.h>
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#include <linux/irq.h>
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#include <linux/smp.h>
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#include <linux/of.h>
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#include <asm/octeon/octeon.h>
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#include <asm/octeon/cvmx-ciu2-defs.h>
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static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu0_en_mirror);
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static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu1_en_mirror);
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static DEFINE_PER_CPU(raw_spinlock_t, octeon_irq_ciu_spinlock);
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struct octeon_irq_ciu_domain_data {
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int num_sum; /* number of sum registers (2 or 3). */
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};
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static __read_mostly u8 octeon_irq_ciu_to_irq[8][64];
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struct octeon_ciu_chip_data {
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union {
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struct { /* only used for ciu3 */
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u64 ciu3_addr;
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unsigned int intsn;
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};
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struct { /* only used for ciu/ciu2 */
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u8 line;
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u8 bit;
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u8 gpio_line;
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};
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};
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int current_cpu; /* Next CPU expected to take this irq */
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};
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struct octeon_core_chip_data {
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struct mutex core_irq_mutex;
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bool current_en;
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bool desired_en;
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u8 bit;
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};
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#define MIPS_CORE_IRQ_LINES 8
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static struct octeon_core_chip_data octeon_irq_core_chip_data[MIPS_CORE_IRQ_LINES];
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static int octeon_irq_set_ciu_mapping(int irq, int line, int bit, int gpio_line,
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struct irq_chip *chip,
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irq_flow_handler_t handler)
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{
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struct octeon_ciu_chip_data *cd;
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cd = kzalloc(sizeof(*cd), GFP_KERNEL);
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if (!cd)
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return -ENOMEM;
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irq_set_chip_and_handler(irq, chip, handler);
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cd->line = line;
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cd->bit = bit;
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cd->gpio_line = gpio_line;
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irq_set_chip_data(irq, cd);
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octeon_irq_ciu_to_irq[line][bit] = irq;
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return 0;
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}
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static void octeon_irq_free_cd(struct irq_domain *d, unsigned int irq)
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{
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struct irq_data *data = irq_get_irq_data(irq);
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struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data);
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irq_set_chip_data(irq, NULL);
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kfree(cd);
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}
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static int octeon_irq_force_ciu_mapping(struct irq_domain *domain,
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int irq, int line, int bit)
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{
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return irq_domain_associate(domain, irq, line << 6 | bit);
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}
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static int octeon_coreid_for_cpu(int cpu)
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{
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#ifdef CONFIG_SMP
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return cpu_logical_map(cpu);
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#else
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return cvmx_get_core_num();
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#endif
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}
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static int octeon_cpu_for_coreid(int coreid)
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{
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#ifdef CONFIG_SMP
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return cpu_number_map(coreid);
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#else
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return smp_processor_id();
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#endif
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}
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static void octeon_irq_core_ack(struct irq_data *data)
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{
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struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
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unsigned int bit = cd->bit;
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/*
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* We don't need to disable IRQs to make these atomic since
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* they are already disabled earlier in the low level
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* interrupt code.
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*/
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clear_c0_status(0x100 << bit);
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/* The two user interrupts must be cleared manually. */
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if (bit < 2)
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clear_c0_cause(0x100 << bit);
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}
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static void octeon_irq_core_eoi(struct irq_data *data)
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{
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struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
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/*
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* We don't need to disable IRQs to make these atomic since
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* they are already disabled earlier in the low level
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* interrupt code.
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*/
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set_c0_status(0x100 << cd->bit);
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}
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static void octeon_irq_core_set_enable_local(void *arg)
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{
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struct irq_data *data = arg;
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struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
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unsigned int mask = 0x100 << cd->bit;
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/*
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* Interrupts are already disabled, so these are atomic.
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*/
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if (cd->desired_en)
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set_c0_status(mask);
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else
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clear_c0_status(mask);
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}
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static void octeon_irq_core_disable(struct irq_data *data)
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{
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struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
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cd->desired_en = false;
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}
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static void octeon_irq_core_enable(struct irq_data *data)
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{
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struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
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cd->desired_en = true;
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}
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static void octeon_irq_core_bus_lock(struct irq_data *data)
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{
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struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
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mutex_lock(&cd->core_irq_mutex);
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}
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static void octeon_irq_core_bus_sync_unlock(struct irq_data *data)
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{
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struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
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if (cd->desired_en != cd->current_en) {
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on_each_cpu(octeon_irq_core_set_enable_local, data, 1);
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cd->current_en = cd->desired_en;
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}
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mutex_unlock(&cd->core_irq_mutex);
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}
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static struct irq_chip octeon_irq_chip_core = {
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.name = "Core",
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.irq_enable = octeon_irq_core_enable,
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.irq_disable = octeon_irq_core_disable,
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.irq_ack = octeon_irq_core_ack,
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.irq_eoi = octeon_irq_core_eoi,
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.irq_bus_lock = octeon_irq_core_bus_lock,
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.irq_bus_sync_unlock = octeon_irq_core_bus_sync_unlock,
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.irq_cpu_online = octeon_irq_core_eoi,
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.irq_cpu_offline = octeon_irq_core_ack,
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.flags = IRQCHIP_ONOFFLINE_ENABLED,
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};
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static void __init octeon_irq_init_core(void)
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{
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int i;
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int irq;
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struct octeon_core_chip_data *cd;
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for (i = 0; i < MIPS_CORE_IRQ_LINES; i++) {
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cd = &octeon_irq_core_chip_data[i];
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cd->current_en = false;
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cd->desired_en = false;
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cd->bit = i;
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mutex_init(&cd->core_irq_mutex);
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irq = OCTEON_IRQ_SW0 + i;
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irq_set_chip_data(irq, cd);
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irq_set_chip_and_handler(irq, &octeon_irq_chip_core,
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handle_percpu_irq);
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}
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}
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static int next_cpu_for_irq(struct irq_data *data)
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{
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#ifdef CONFIG_SMP
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int cpu;
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int weight = cpumask_weight(data->affinity);
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struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data);
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if (weight > 1) {
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cpu = cd->current_cpu;
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for (;;) {
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cpu = cpumask_next(cpu, data->affinity);
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if (cpu >= nr_cpu_ids) {
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cpu = -1;
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continue;
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} else if (cpumask_test_cpu(cpu, cpu_online_mask)) {
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break;
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}
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}
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} else if (weight == 1) {
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cpu = cpumask_first(data->affinity);
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} else {
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cpu = smp_processor_id();
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}
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cd->current_cpu = cpu;
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return cpu;
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#else
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return smp_processor_id();
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#endif
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}
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static void octeon_irq_ciu_enable(struct irq_data *data)
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{
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int cpu = next_cpu_for_irq(data);
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int coreid = octeon_coreid_for_cpu(cpu);
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unsigned long *pen;
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unsigned long flags;
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struct octeon_ciu_chip_data *cd;
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raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
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cd = irq_data_get_irq_chip_data(data);
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raw_spin_lock_irqsave(lock, flags);
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if (cd->line == 0) {
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pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
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__set_bit(cd->bit, pen);
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/*
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* Must be visible to octeon_irq_ip{2,3}_ciu() before
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* enabling the irq.
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*/
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wmb();
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cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
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} else {
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pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
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__set_bit(cd->bit, pen);
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/*
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* Must be visible to octeon_irq_ip{2,3}_ciu() before
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* enabling the irq.
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*/
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wmb();
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cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
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}
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raw_spin_unlock_irqrestore(lock, flags);
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}
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static void octeon_irq_ciu_enable_local(struct irq_data *data)
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{
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unsigned long *pen;
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unsigned long flags;
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struct octeon_ciu_chip_data *cd;
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raw_spinlock_t *lock = this_cpu_ptr(&octeon_irq_ciu_spinlock);
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cd = irq_data_get_irq_chip_data(data);
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raw_spin_lock_irqsave(lock, flags);
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if (cd->line == 0) {
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pen = this_cpu_ptr(&octeon_irq_ciu0_en_mirror);
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__set_bit(cd->bit, pen);
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/*
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* Must be visible to octeon_irq_ip{2,3}_ciu() before
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* enabling the irq.
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*/
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wmb();
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cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2), *pen);
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} else {
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pen = this_cpu_ptr(&octeon_irq_ciu1_en_mirror);
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__set_bit(cd->bit, pen);
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/*
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* Must be visible to octeon_irq_ip{2,3}_ciu() before
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* enabling the irq.
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*/
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wmb();
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cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1), *pen);
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}
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raw_spin_unlock_irqrestore(lock, flags);
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}
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static void octeon_irq_ciu_disable_local(struct irq_data *data)
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{
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unsigned long *pen;
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unsigned long flags;
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struct octeon_ciu_chip_data *cd;
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raw_spinlock_t *lock = this_cpu_ptr(&octeon_irq_ciu_spinlock);
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cd = irq_data_get_irq_chip_data(data);
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raw_spin_lock_irqsave(lock, flags);
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if (cd->line == 0) {
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pen = this_cpu_ptr(&octeon_irq_ciu0_en_mirror);
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__clear_bit(cd->bit, pen);
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/*
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* Must be visible to octeon_irq_ip{2,3}_ciu() before
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* enabling the irq.
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*/
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wmb();
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cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2), *pen);
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} else {
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pen = this_cpu_ptr(&octeon_irq_ciu1_en_mirror);
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__clear_bit(cd->bit, pen);
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/*
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* Must be visible to octeon_irq_ip{2,3}_ciu() before
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* enabling the irq.
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*/
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wmb();
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cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1), *pen);
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}
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raw_spin_unlock_irqrestore(lock, flags);
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}
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static void octeon_irq_ciu_disable_all(struct irq_data *data)
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{
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unsigned long flags;
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unsigned long *pen;
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int cpu;
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struct octeon_ciu_chip_data *cd;
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raw_spinlock_t *lock;
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cd = irq_data_get_irq_chip_data(data);
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for_each_online_cpu(cpu) {
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int coreid = octeon_coreid_for_cpu(cpu);
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lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
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if (cd->line == 0)
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pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
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else
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pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
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raw_spin_lock_irqsave(lock, flags);
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__clear_bit(cd->bit, pen);
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/*
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* Must be visible to octeon_irq_ip{2,3}_ciu() before
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* enabling the irq.
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*/
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wmb();
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if (cd->line == 0)
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cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
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else
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cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
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raw_spin_unlock_irqrestore(lock, flags);
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}
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}
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static void octeon_irq_ciu_enable_all(struct irq_data *data)
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{
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unsigned long flags;
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unsigned long *pen;
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int cpu;
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struct octeon_ciu_chip_data *cd;
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raw_spinlock_t *lock;
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cd = irq_data_get_irq_chip_data(data);
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for_each_online_cpu(cpu) {
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int coreid = octeon_coreid_for_cpu(cpu);
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lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
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if (cd->line == 0)
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pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
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else
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pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
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raw_spin_lock_irqsave(lock, flags);
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__set_bit(cd->bit, pen);
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/*
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* Must be visible to octeon_irq_ip{2,3}_ciu() before
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* enabling the irq.
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*/
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wmb();
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if (cd->line == 0)
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cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
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else
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cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
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raw_spin_unlock_irqrestore(lock, flags);
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}
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}
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/*
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* Enable the irq on the next core in the affinity set for chips that
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* have the EN*_W1{S,C} registers.
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*/
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static void octeon_irq_ciu_enable_v2(struct irq_data *data)
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{
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u64 mask;
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int cpu = next_cpu_for_irq(data);
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struct octeon_ciu_chip_data *cd;
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cd = irq_data_get_irq_chip_data(data);
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mask = 1ull << (cd->bit);
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/*
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* Called under the desc lock, so these should never get out
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* of sync.
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*/
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if (cd->line == 0) {
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int index = octeon_coreid_for_cpu(cpu) * 2;
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set_bit(cd->bit, &per_cpu(octeon_irq_ciu0_en_mirror, cpu));
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cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
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} else {
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int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
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set_bit(cd->bit, &per_cpu(octeon_irq_ciu1_en_mirror, cpu));
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cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
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}
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}
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/*
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* Enable the irq in the sum2 registers.
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*/
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static void octeon_irq_ciu_enable_sum2(struct irq_data *data)
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{
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u64 mask;
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int cpu = next_cpu_for_irq(data);
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int index = octeon_coreid_for_cpu(cpu);
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struct octeon_ciu_chip_data *cd;
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cd = irq_data_get_irq_chip_data(data);
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mask = 1ull << (cd->bit);
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cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1S(index), mask);
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}
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/*
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* Disable the irq in the sum2 registers.
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*/
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static void octeon_irq_ciu_disable_local_sum2(struct irq_data *data)
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{
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u64 mask;
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int cpu = next_cpu_for_irq(data);
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int index = octeon_coreid_for_cpu(cpu);
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struct octeon_ciu_chip_data *cd;
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cd = irq_data_get_irq_chip_data(data);
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mask = 1ull << (cd->bit);
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cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(index), mask);
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}
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static void octeon_irq_ciu_ack_sum2(struct irq_data *data)
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{
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u64 mask;
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int cpu = next_cpu_for_irq(data);
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int index = octeon_coreid_for_cpu(cpu);
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struct octeon_ciu_chip_data *cd;
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cd = irq_data_get_irq_chip_data(data);
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mask = 1ull << (cd->bit);
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cvmx_write_csr(CVMX_CIU_SUM2_PPX_IP4(index), mask);
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|
}
|
|
|
|
static void octeon_irq_ciu_disable_all_sum2(struct irq_data *data)
|
|
{
|
|
int cpu;
|
|
struct octeon_ciu_chip_data *cd;
|
|
u64 mask;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << (cd->bit);
|
|
|
|
for_each_online_cpu(cpu) {
|
|
int coreid = octeon_coreid_for_cpu(cpu);
|
|
|
|
cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(coreid), mask);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Enable the irq on the current CPU for chips that
|
|
* have the EN*_W1{S,C} registers.
|
|
*/
|
|
static void octeon_irq_ciu_enable_local_v2(struct irq_data *data)
|
|
{
|
|
u64 mask;
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << (cd->bit);
|
|
|
|
if (cd->line == 0) {
|
|
int index = cvmx_get_core_num() * 2;
|
|
set_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu0_en_mirror));
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
|
|
} else {
|
|
int index = cvmx_get_core_num() * 2 + 1;
|
|
set_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu1_en_mirror));
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
|
|
}
|
|
}
|
|
|
|
static void octeon_irq_ciu_disable_local_v2(struct irq_data *data)
|
|
{
|
|
u64 mask;
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << (cd->bit);
|
|
|
|
if (cd->line == 0) {
|
|
int index = cvmx_get_core_num() * 2;
|
|
clear_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu0_en_mirror));
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask);
|
|
} else {
|
|
int index = cvmx_get_core_num() * 2 + 1;
|
|
clear_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu1_en_mirror));
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Write to the W1C bit in CVMX_CIU_INTX_SUM0 to clear the irq.
|
|
*/
|
|
static void octeon_irq_ciu_ack(struct irq_data *data)
|
|
{
|
|
u64 mask;
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << (cd->bit);
|
|
|
|
if (cd->line == 0) {
|
|
int index = cvmx_get_core_num() * 2;
|
|
cvmx_write_csr(CVMX_CIU_INTX_SUM0(index), mask);
|
|
} else {
|
|
cvmx_write_csr(CVMX_CIU_INT_SUM1, mask);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Disable the irq on the all cores for chips that have the EN*_W1{S,C}
|
|
* registers.
|
|
*/
|
|
static void octeon_irq_ciu_disable_all_v2(struct irq_data *data)
|
|
{
|
|
int cpu;
|
|
u64 mask;
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << (cd->bit);
|
|
|
|
if (cd->line == 0) {
|
|
for_each_online_cpu(cpu) {
|
|
int index = octeon_coreid_for_cpu(cpu) * 2;
|
|
clear_bit(cd->bit,
|
|
&per_cpu(octeon_irq_ciu0_en_mirror, cpu));
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask);
|
|
}
|
|
} else {
|
|
for_each_online_cpu(cpu) {
|
|
int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
|
|
clear_bit(cd->bit,
|
|
&per_cpu(octeon_irq_ciu1_en_mirror, cpu));
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Enable the irq on the all cores for chips that have the EN*_W1{S,C}
|
|
* registers.
|
|
*/
|
|
static void octeon_irq_ciu_enable_all_v2(struct irq_data *data)
|
|
{
|
|
int cpu;
|
|
u64 mask;
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << (cd->bit);
|
|
|
|
if (cd->line == 0) {
|
|
for_each_online_cpu(cpu) {
|
|
int index = octeon_coreid_for_cpu(cpu) * 2;
|
|
set_bit(cd->bit,
|
|
&per_cpu(octeon_irq_ciu0_en_mirror, cpu));
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
|
|
}
|
|
} else {
|
|
for_each_online_cpu(cpu) {
|
|
int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
|
|
set_bit(cd->bit,
|
|
&per_cpu(octeon_irq_ciu1_en_mirror, cpu));
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void octeon_irq_gpio_setup(struct irq_data *data)
|
|
{
|
|
union cvmx_gpio_bit_cfgx cfg;
|
|
struct octeon_ciu_chip_data *cd;
|
|
u32 t = irqd_get_trigger_type(data);
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
|
|
cfg.u64 = 0;
|
|
cfg.s.int_en = 1;
|
|
cfg.s.int_type = (t & IRQ_TYPE_EDGE_BOTH) != 0;
|
|
cfg.s.rx_xor = (t & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING)) != 0;
|
|
|
|
/* 140 nS glitch filter*/
|
|
cfg.s.fil_cnt = 7;
|
|
cfg.s.fil_sel = 3;
|
|
|
|
cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), cfg.u64);
|
|
}
|
|
|
|
static void octeon_irq_ciu_enable_gpio_v2(struct irq_data *data)
|
|
{
|
|
octeon_irq_gpio_setup(data);
|
|
octeon_irq_ciu_enable_v2(data);
|
|
}
|
|
|
|
static void octeon_irq_ciu_enable_gpio(struct irq_data *data)
|
|
{
|
|
octeon_irq_gpio_setup(data);
|
|
octeon_irq_ciu_enable(data);
|
|
}
|
|
|
|
static int octeon_irq_ciu_gpio_set_type(struct irq_data *data, unsigned int t)
|
|
{
|
|
irqd_set_trigger_type(data, t);
|
|
octeon_irq_gpio_setup(data);
|
|
|
|
return IRQ_SET_MASK_OK;
|
|
}
|
|
|
|
static void octeon_irq_ciu_disable_gpio_v2(struct irq_data *data)
|
|
{
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0);
|
|
|
|
octeon_irq_ciu_disable_all_v2(data);
|
|
}
|
|
|
|
static void octeon_irq_ciu_disable_gpio(struct irq_data *data)
|
|
{
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0);
|
|
|
|
octeon_irq_ciu_disable_all(data);
|
|
}
|
|
|
|
static void octeon_irq_ciu_gpio_ack(struct irq_data *data)
|
|
{
|
|
struct octeon_ciu_chip_data *cd;
|
|
u64 mask;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << (cd->gpio_line);
|
|
|
|
cvmx_write_csr(CVMX_GPIO_INT_CLR, mask);
|
|
}
|
|
|
|
static void octeon_irq_handle_trigger(unsigned int irq, struct irq_desc *desc)
|
|
{
|
|
if (irq_get_trigger_type(irq) & IRQ_TYPE_EDGE_BOTH)
|
|
handle_edge_irq(irq, desc);
|
|
else
|
|
handle_level_irq(irq, desc);
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
static void octeon_irq_cpu_offline_ciu(struct irq_data *data)
|
|
{
|
|
int cpu = smp_processor_id();
|
|
cpumask_t new_affinity;
|
|
|
|
if (!cpumask_test_cpu(cpu, data->affinity))
|
|
return;
|
|
|
|
if (cpumask_weight(data->affinity) > 1) {
|
|
/*
|
|
* It has multi CPU affinity, just remove this CPU
|
|
* from the affinity set.
|
|
*/
|
|
cpumask_copy(&new_affinity, data->affinity);
|
|
cpumask_clear_cpu(cpu, &new_affinity);
|
|
} else {
|
|
/* Otherwise, put it on lowest numbered online CPU. */
|
|
cpumask_clear(&new_affinity);
|
|
cpumask_set_cpu(cpumask_first(cpu_online_mask), &new_affinity);
|
|
}
|
|
irq_set_affinity_locked(data, &new_affinity, false);
|
|
}
|
|
|
|
static int octeon_irq_ciu_set_affinity(struct irq_data *data,
|
|
const struct cpumask *dest, bool force)
|
|
{
|
|
int cpu;
|
|
bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
|
|
unsigned long flags;
|
|
struct octeon_ciu_chip_data *cd;
|
|
unsigned long *pen;
|
|
raw_spinlock_t *lock;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
|
|
/*
|
|
* For non-v2 CIU, we will allow only single CPU affinity.
|
|
* This removes the need to do locking in the .ack/.eoi
|
|
* functions.
|
|
*/
|
|
if (cpumask_weight(dest) != 1)
|
|
return -EINVAL;
|
|
|
|
if (!enable_one)
|
|
return 0;
|
|
|
|
|
|
for_each_online_cpu(cpu) {
|
|
int coreid = octeon_coreid_for_cpu(cpu);
|
|
|
|
lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
|
|
raw_spin_lock_irqsave(lock, flags);
|
|
|
|
if (cd->line == 0)
|
|
pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
|
|
else
|
|
pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
|
|
|
|
if (cpumask_test_cpu(cpu, dest) && enable_one) {
|
|
enable_one = 0;
|
|
__set_bit(cd->bit, pen);
|
|
} else {
|
|
__clear_bit(cd->bit, pen);
|
|
}
|
|
/*
|
|
* Must be visible to octeon_irq_ip{2,3}_ciu() before
|
|
* enabling the irq.
|
|
*/
|
|
wmb();
|
|
|
|
if (cd->line == 0)
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
|
|
else
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
|
|
|
|
raw_spin_unlock_irqrestore(lock, flags);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Set affinity for the irq for chips that have the EN*_W1{S,C}
|
|
* registers.
|
|
*/
|
|
static int octeon_irq_ciu_set_affinity_v2(struct irq_data *data,
|
|
const struct cpumask *dest,
|
|
bool force)
|
|
{
|
|
int cpu;
|
|
bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
|
|
u64 mask;
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
if (!enable_one)
|
|
return 0;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << cd->bit;
|
|
|
|
if (cd->line == 0) {
|
|
for_each_online_cpu(cpu) {
|
|
unsigned long *pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
|
|
int index = octeon_coreid_for_cpu(cpu) * 2;
|
|
if (cpumask_test_cpu(cpu, dest) && enable_one) {
|
|
enable_one = false;
|
|
set_bit(cd->bit, pen);
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask);
|
|
} else {
|
|
clear_bit(cd->bit, pen);
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask);
|
|
}
|
|
}
|
|
} else {
|
|
for_each_online_cpu(cpu) {
|
|
unsigned long *pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
|
|
int index = octeon_coreid_for_cpu(cpu) * 2 + 1;
|
|
if (cpumask_test_cpu(cpu, dest) && enable_one) {
|
|
enable_one = false;
|
|
set_bit(cd->bit, pen);
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask);
|
|
} else {
|
|
clear_bit(cd->bit, pen);
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int octeon_irq_ciu_set_affinity_sum2(struct irq_data *data,
|
|
const struct cpumask *dest,
|
|
bool force)
|
|
{
|
|
int cpu;
|
|
bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
|
|
u64 mask;
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
if (!enable_one)
|
|
return 0;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << cd->bit;
|
|
|
|
for_each_online_cpu(cpu) {
|
|
int index = octeon_coreid_for_cpu(cpu);
|
|
|
|
if (cpumask_test_cpu(cpu, dest) && enable_one) {
|
|
enable_one = false;
|
|
cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1S(index), mask);
|
|
} else {
|
|
cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(index), mask);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Newer octeon chips have support for lockless CIU operation.
|
|
*/
|
|
static struct irq_chip octeon_irq_chip_ciu_v2 = {
|
|
.name = "CIU",
|
|
.irq_enable = octeon_irq_ciu_enable_v2,
|
|
.irq_disable = octeon_irq_ciu_disable_all_v2,
|
|
.irq_mask = octeon_irq_ciu_disable_local_v2,
|
|
.irq_unmask = octeon_irq_ciu_enable_v2,
|
|
#ifdef CONFIG_SMP
|
|
.irq_set_affinity = octeon_irq_ciu_set_affinity_v2,
|
|
.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
|
|
#endif
|
|
};
|
|
|
|
static struct irq_chip octeon_irq_chip_ciu_v2_edge = {
|
|
.name = "CIU",
|
|
.irq_enable = octeon_irq_ciu_enable_v2,
|
|
.irq_disable = octeon_irq_ciu_disable_all_v2,
|
|
.irq_ack = octeon_irq_ciu_ack,
|
|
.irq_mask = octeon_irq_ciu_disable_local_v2,
|
|
.irq_unmask = octeon_irq_ciu_enable_v2,
|
|
#ifdef CONFIG_SMP
|
|
.irq_set_affinity = octeon_irq_ciu_set_affinity_v2,
|
|
.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
|
|
#endif
|
|
};
|
|
|
|
/*
|
|
* Newer octeon chips have support for lockless CIU operation.
|
|
*/
|
|
static struct irq_chip octeon_irq_chip_ciu_sum2 = {
|
|
.name = "CIU",
|
|
.irq_enable = octeon_irq_ciu_enable_sum2,
|
|
.irq_disable = octeon_irq_ciu_disable_all_sum2,
|
|
.irq_mask = octeon_irq_ciu_disable_local_sum2,
|
|
.irq_unmask = octeon_irq_ciu_enable_sum2,
|
|
#ifdef CONFIG_SMP
|
|
.irq_set_affinity = octeon_irq_ciu_set_affinity_sum2,
|
|
.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
|
|
#endif
|
|
};
|
|
|
|
static struct irq_chip octeon_irq_chip_ciu_sum2_edge = {
|
|
.name = "CIU",
|
|
.irq_enable = octeon_irq_ciu_enable_sum2,
|
|
.irq_disable = octeon_irq_ciu_disable_all_sum2,
|
|
.irq_ack = octeon_irq_ciu_ack_sum2,
|
|
.irq_mask = octeon_irq_ciu_disable_local_sum2,
|
|
.irq_unmask = octeon_irq_ciu_enable_sum2,
|
|
#ifdef CONFIG_SMP
|
|
.irq_set_affinity = octeon_irq_ciu_set_affinity_sum2,
|
|
.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
|
|
#endif
|
|
};
|
|
|
|
static struct irq_chip octeon_irq_chip_ciu = {
|
|
.name = "CIU",
|
|
.irq_enable = octeon_irq_ciu_enable,
|
|
.irq_disable = octeon_irq_ciu_disable_all,
|
|
.irq_mask = octeon_irq_ciu_disable_local,
|
|
.irq_unmask = octeon_irq_ciu_enable,
|
|
#ifdef CONFIG_SMP
|
|
.irq_set_affinity = octeon_irq_ciu_set_affinity,
|
|
.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
|
|
#endif
|
|
};
|
|
|
|
static struct irq_chip octeon_irq_chip_ciu_edge = {
|
|
.name = "CIU",
|
|
.irq_enable = octeon_irq_ciu_enable,
|
|
.irq_disable = octeon_irq_ciu_disable_all,
|
|
.irq_ack = octeon_irq_ciu_ack,
|
|
.irq_mask = octeon_irq_ciu_disable_local,
|
|
.irq_unmask = octeon_irq_ciu_enable,
|
|
#ifdef CONFIG_SMP
|
|
.irq_set_affinity = octeon_irq_ciu_set_affinity,
|
|
.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
|
|
#endif
|
|
};
|
|
|
|
/* The mbox versions don't do any affinity or round-robin. */
|
|
static struct irq_chip octeon_irq_chip_ciu_mbox_v2 = {
|
|
.name = "CIU-M",
|
|
.irq_enable = octeon_irq_ciu_enable_all_v2,
|
|
.irq_disable = octeon_irq_ciu_disable_all_v2,
|
|
.irq_ack = octeon_irq_ciu_disable_local_v2,
|
|
.irq_eoi = octeon_irq_ciu_enable_local_v2,
|
|
|
|
.irq_cpu_online = octeon_irq_ciu_enable_local_v2,
|
|
.irq_cpu_offline = octeon_irq_ciu_disable_local_v2,
|
|
.flags = IRQCHIP_ONOFFLINE_ENABLED,
|
|
};
|
|
|
|
static struct irq_chip octeon_irq_chip_ciu_mbox = {
|
|
.name = "CIU-M",
|
|
.irq_enable = octeon_irq_ciu_enable_all,
|
|
.irq_disable = octeon_irq_ciu_disable_all,
|
|
.irq_ack = octeon_irq_ciu_disable_local,
|
|
.irq_eoi = octeon_irq_ciu_enable_local,
|
|
|
|
.irq_cpu_online = octeon_irq_ciu_enable_local,
|
|
.irq_cpu_offline = octeon_irq_ciu_disable_local,
|
|
.flags = IRQCHIP_ONOFFLINE_ENABLED,
|
|
};
|
|
|
|
static struct irq_chip octeon_irq_chip_ciu_gpio_v2 = {
|
|
.name = "CIU-GPIO",
|
|
.irq_enable = octeon_irq_ciu_enable_gpio_v2,
|
|
.irq_disable = octeon_irq_ciu_disable_gpio_v2,
|
|
.irq_ack = octeon_irq_ciu_gpio_ack,
|
|
.irq_mask = octeon_irq_ciu_disable_local_v2,
|
|
.irq_unmask = octeon_irq_ciu_enable_v2,
|
|
.irq_set_type = octeon_irq_ciu_gpio_set_type,
|
|
#ifdef CONFIG_SMP
|
|
.irq_set_affinity = octeon_irq_ciu_set_affinity_v2,
|
|
.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
|
|
#endif
|
|
.flags = IRQCHIP_SET_TYPE_MASKED,
|
|
};
|
|
|
|
static struct irq_chip octeon_irq_chip_ciu_gpio = {
|
|
.name = "CIU-GPIO",
|
|
.irq_enable = octeon_irq_ciu_enable_gpio,
|
|
.irq_disable = octeon_irq_ciu_disable_gpio,
|
|
.irq_mask = octeon_irq_ciu_disable_local,
|
|
.irq_unmask = octeon_irq_ciu_enable,
|
|
.irq_ack = octeon_irq_ciu_gpio_ack,
|
|
.irq_set_type = octeon_irq_ciu_gpio_set_type,
|
|
#ifdef CONFIG_SMP
|
|
.irq_set_affinity = octeon_irq_ciu_set_affinity,
|
|
.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
|
|
#endif
|
|
.flags = IRQCHIP_SET_TYPE_MASKED,
|
|
};
|
|
|
|
/*
|
|
* Watchdog interrupts are special. They are associated with a single
|
|
* core, so we hardwire the affinity to that core.
|
|
*/
|
|
static void octeon_irq_ciu_wd_enable(struct irq_data *data)
|
|
{
|
|
unsigned long flags;
|
|
unsigned long *pen;
|
|
int coreid = data->irq - OCTEON_IRQ_WDOG0; /* Bit 0-63 of EN1 */
|
|
int cpu = octeon_cpu_for_coreid(coreid);
|
|
raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
|
|
|
|
raw_spin_lock_irqsave(lock, flags);
|
|
pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
|
|
__set_bit(coreid, pen);
|
|
/*
|
|
* Must be visible to octeon_irq_ip{2,3}_ciu() before enabling
|
|
* the irq.
|
|
*/
|
|
wmb();
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen);
|
|
raw_spin_unlock_irqrestore(lock, flags);
|
|
}
|
|
|
|
/*
|
|
* Watchdog interrupts are special. They are associated with a single
|
|
* core, so we hardwire the affinity to that core.
|
|
*/
|
|
static void octeon_irq_ciu1_wd_enable_v2(struct irq_data *data)
|
|
{
|
|
int coreid = data->irq - OCTEON_IRQ_WDOG0;
|
|
int cpu = octeon_cpu_for_coreid(coreid);
|
|
|
|
set_bit(coreid, &per_cpu(octeon_irq_ciu1_en_mirror, cpu));
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(coreid * 2 + 1), 1ull << coreid);
|
|
}
|
|
|
|
|
|
static struct irq_chip octeon_irq_chip_ciu_wd_v2 = {
|
|
.name = "CIU-W",
|
|
.irq_enable = octeon_irq_ciu1_wd_enable_v2,
|
|
.irq_disable = octeon_irq_ciu_disable_all_v2,
|
|
.irq_mask = octeon_irq_ciu_disable_local_v2,
|
|
.irq_unmask = octeon_irq_ciu_enable_local_v2,
|
|
};
|
|
|
|
static struct irq_chip octeon_irq_chip_ciu_wd = {
|
|
.name = "CIU-W",
|
|
.irq_enable = octeon_irq_ciu_wd_enable,
|
|
.irq_disable = octeon_irq_ciu_disable_all,
|
|
.irq_mask = octeon_irq_ciu_disable_local,
|
|
.irq_unmask = octeon_irq_ciu_enable_local,
|
|
};
|
|
|
|
static bool octeon_irq_ciu_is_edge(unsigned int line, unsigned int bit)
|
|
{
|
|
bool edge = false;
|
|
|
|
if (line == 0)
|
|
switch (bit) {
|
|
case 48 ... 49: /* GMX DRP */
|
|
case 50: /* IPD_DRP */
|
|
case 52 ... 55: /* Timers */
|
|
case 58: /* MPI */
|
|
edge = true;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
else /* line == 1 */
|
|
switch (bit) {
|
|
case 47: /* PTP */
|
|
edge = true;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return edge;
|
|
}
|
|
|
|
struct octeon_irq_gpio_domain_data {
|
|
unsigned int base_hwirq;
|
|
};
|
|
|
|
static int octeon_irq_gpio_xlat(struct irq_domain *d,
|
|
struct device_node *node,
|
|
const u32 *intspec,
|
|
unsigned int intsize,
|
|
unsigned long *out_hwirq,
|
|
unsigned int *out_type)
|
|
{
|
|
unsigned int type;
|
|
unsigned int pin;
|
|
unsigned int trigger;
|
|
|
|
if (d->of_node != node)
|
|
return -EINVAL;
|
|
|
|
if (intsize < 2)
|
|
return -EINVAL;
|
|
|
|
pin = intspec[0];
|
|
if (pin >= 16)
|
|
return -EINVAL;
|
|
|
|
trigger = intspec[1];
|
|
|
|
switch (trigger) {
|
|
case 1:
|
|
type = IRQ_TYPE_EDGE_RISING;
|
|
break;
|
|
case 2:
|
|
type = IRQ_TYPE_EDGE_FALLING;
|
|
break;
|
|
case 4:
|
|
type = IRQ_TYPE_LEVEL_HIGH;
|
|
break;
|
|
case 8:
|
|
type = IRQ_TYPE_LEVEL_LOW;
|
|
break;
|
|
default:
|
|
pr_err("Error: (%s) Invalid irq trigger specification: %x\n",
|
|
node->name,
|
|
trigger);
|
|
type = IRQ_TYPE_LEVEL_LOW;
|
|
break;
|
|
}
|
|
*out_type = type;
|
|
*out_hwirq = pin;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int octeon_irq_ciu_xlat(struct irq_domain *d,
|
|
struct device_node *node,
|
|
const u32 *intspec,
|
|
unsigned int intsize,
|
|
unsigned long *out_hwirq,
|
|
unsigned int *out_type)
|
|
{
|
|
unsigned int ciu, bit;
|
|
struct octeon_irq_ciu_domain_data *dd = d->host_data;
|
|
|
|
ciu = intspec[0];
|
|
bit = intspec[1];
|
|
|
|
if (ciu >= dd->num_sum || bit > 63)
|
|
return -EINVAL;
|
|
|
|
*out_hwirq = (ciu << 6) | bit;
|
|
*out_type = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct irq_chip *octeon_irq_ciu_chip;
|
|
static struct irq_chip *octeon_irq_ciu_chip_edge;
|
|
static struct irq_chip *octeon_irq_gpio_chip;
|
|
|
|
static bool octeon_irq_virq_in_range(unsigned int virq)
|
|
{
|
|
/* We cannot let it overflow the mapping array. */
|
|
if (virq < (1ul << 8 * sizeof(octeon_irq_ciu_to_irq[0][0])))
|
|
return true;
|
|
|
|
WARN_ONCE(true, "virq out of range %u.\n", virq);
|
|
return false;
|
|
}
|
|
|
|
static int octeon_irq_ciu_map(struct irq_domain *d,
|
|
unsigned int virq, irq_hw_number_t hw)
|
|
{
|
|
int rv;
|
|
unsigned int line = hw >> 6;
|
|
unsigned int bit = hw & 63;
|
|
struct octeon_irq_ciu_domain_data *dd = d->host_data;
|
|
|
|
if (!octeon_irq_virq_in_range(virq))
|
|
return -EINVAL;
|
|
|
|
/* Don't map irq if it is reserved for GPIO. */
|
|
if (line == 0 && bit >= 16 && bit <32)
|
|
return 0;
|
|
|
|
if (line >= dd->num_sum || octeon_irq_ciu_to_irq[line][bit] != 0)
|
|
return -EINVAL;
|
|
|
|
if (line == 2) {
|
|
if (octeon_irq_ciu_is_edge(line, bit))
|
|
rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
|
|
&octeon_irq_chip_ciu_sum2_edge,
|
|
handle_edge_irq);
|
|
else
|
|
rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
|
|
&octeon_irq_chip_ciu_sum2,
|
|
handle_level_irq);
|
|
} else {
|
|
if (octeon_irq_ciu_is_edge(line, bit))
|
|
rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
|
|
octeon_irq_ciu_chip_edge,
|
|
handle_edge_irq);
|
|
else
|
|
rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0,
|
|
octeon_irq_ciu_chip,
|
|
handle_level_irq);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
static int octeon_irq_gpio_map(struct irq_domain *d,
|
|
unsigned int virq, irq_hw_number_t hw)
|
|
{
|
|
struct octeon_irq_gpio_domain_data *gpiod = d->host_data;
|
|
unsigned int line, bit;
|
|
int r;
|
|
|
|
if (!octeon_irq_virq_in_range(virq))
|
|
return -EINVAL;
|
|
|
|
line = (hw + gpiod->base_hwirq) >> 6;
|
|
bit = (hw + gpiod->base_hwirq) & 63;
|
|
if (line > ARRAY_SIZE(octeon_irq_ciu_to_irq) ||
|
|
octeon_irq_ciu_to_irq[line][bit] != 0)
|
|
return -EINVAL;
|
|
|
|
r = octeon_irq_set_ciu_mapping(virq, line, bit, hw,
|
|
octeon_irq_gpio_chip, octeon_irq_handle_trigger);
|
|
return r;
|
|
}
|
|
|
|
static struct irq_domain_ops octeon_irq_domain_ciu_ops = {
|
|
.map = octeon_irq_ciu_map,
|
|
.unmap = octeon_irq_free_cd,
|
|
.xlate = octeon_irq_ciu_xlat,
|
|
};
|
|
|
|
static struct irq_domain_ops octeon_irq_domain_gpio_ops = {
|
|
.map = octeon_irq_gpio_map,
|
|
.unmap = octeon_irq_free_cd,
|
|
.xlate = octeon_irq_gpio_xlat,
|
|
};
|
|
|
|
static void octeon_irq_ip2_ciu(void)
|
|
{
|
|
const unsigned long core_id = cvmx_get_core_num();
|
|
u64 ciu_sum = cvmx_read_csr(CVMX_CIU_INTX_SUM0(core_id * 2));
|
|
|
|
ciu_sum &= __this_cpu_read(octeon_irq_ciu0_en_mirror);
|
|
if (likely(ciu_sum)) {
|
|
int bit = fls64(ciu_sum) - 1;
|
|
int irq = octeon_irq_ciu_to_irq[0][bit];
|
|
if (likely(irq))
|
|
do_IRQ(irq);
|
|
else
|
|
spurious_interrupt();
|
|
} else {
|
|
spurious_interrupt();
|
|
}
|
|
}
|
|
|
|
static void octeon_irq_ip3_ciu(void)
|
|
{
|
|
u64 ciu_sum = cvmx_read_csr(CVMX_CIU_INT_SUM1);
|
|
|
|
ciu_sum &= __this_cpu_read(octeon_irq_ciu1_en_mirror);
|
|
if (likely(ciu_sum)) {
|
|
int bit = fls64(ciu_sum) - 1;
|
|
int irq = octeon_irq_ciu_to_irq[1][bit];
|
|
if (likely(irq))
|
|
do_IRQ(irq);
|
|
else
|
|
spurious_interrupt();
|
|
} else {
|
|
spurious_interrupt();
|
|
}
|
|
}
|
|
|
|
static void octeon_irq_ip4_ciu(void)
|
|
{
|
|
int coreid = cvmx_get_core_num();
|
|
u64 ciu_sum = cvmx_read_csr(CVMX_CIU_SUM2_PPX_IP4(coreid));
|
|
u64 ciu_en = cvmx_read_csr(CVMX_CIU_EN2_PPX_IP4(coreid));
|
|
|
|
ciu_sum &= ciu_en;
|
|
if (likely(ciu_sum)) {
|
|
int bit = fls64(ciu_sum) - 1;
|
|
int irq = octeon_irq_ciu_to_irq[2][bit];
|
|
|
|
if (likely(irq))
|
|
do_IRQ(irq);
|
|
else
|
|
spurious_interrupt();
|
|
} else {
|
|
spurious_interrupt();
|
|
}
|
|
}
|
|
|
|
static bool octeon_irq_use_ip4;
|
|
|
|
static void octeon_irq_local_enable_ip4(void *arg)
|
|
{
|
|
set_c0_status(STATUSF_IP4);
|
|
}
|
|
|
|
static void octeon_irq_ip4_mask(void)
|
|
{
|
|
clear_c0_status(STATUSF_IP4);
|
|
spurious_interrupt();
|
|
}
|
|
|
|
static void (*octeon_irq_ip2)(void);
|
|
static void (*octeon_irq_ip3)(void);
|
|
static void (*octeon_irq_ip4)(void);
|
|
|
|
void (*octeon_irq_setup_secondary)(void);
|
|
|
|
void octeon_irq_set_ip4_handler(octeon_irq_ip4_handler_t h)
|
|
{
|
|
octeon_irq_ip4 = h;
|
|
octeon_irq_use_ip4 = true;
|
|
on_each_cpu(octeon_irq_local_enable_ip4, NULL, 1);
|
|
}
|
|
|
|
static void octeon_irq_percpu_enable(void)
|
|
{
|
|
irq_cpu_online();
|
|
}
|
|
|
|
static void octeon_irq_init_ciu_percpu(void)
|
|
{
|
|
int coreid = cvmx_get_core_num();
|
|
|
|
|
|
__this_cpu_write(octeon_irq_ciu0_en_mirror, 0);
|
|
__this_cpu_write(octeon_irq_ciu1_en_mirror, 0);
|
|
wmb();
|
|
raw_spin_lock_init(this_cpu_ptr(&octeon_irq_ciu_spinlock));
|
|
/*
|
|
* Disable All CIU Interrupts. The ones we need will be
|
|
* enabled later. Read the SUM register so we know the write
|
|
* completed.
|
|
*/
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2)), 0);
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2 + 1)), 0);
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2)), 0);
|
|
cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2 + 1)), 0);
|
|
cvmx_read_csr(CVMX_CIU_INTX_SUM0((coreid * 2)));
|
|
}
|
|
|
|
static void octeon_irq_init_ciu2_percpu(void)
|
|
{
|
|
u64 regx, ipx;
|
|
int coreid = cvmx_get_core_num();
|
|
u64 base = CVMX_CIU2_EN_PPX_IP2_WRKQ(coreid);
|
|
|
|
/*
|
|
* Disable All CIU2 Interrupts. The ones we need will be
|
|
* enabled later. Read the SUM register so we know the write
|
|
* completed.
|
|
*
|
|
* There are 9 registers and 3 IPX levels with strides 0x1000
|
|
* and 0x200 respectivly. Use loops to clear them.
|
|
*/
|
|
for (regx = 0; regx <= 0x8000; regx += 0x1000) {
|
|
for (ipx = 0; ipx <= 0x400; ipx += 0x200)
|
|
cvmx_write_csr(base + regx + ipx, 0);
|
|
}
|
|
|
|
cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP2(coreid));
|
|
}
|
|
|
|
static void octeon_irq_setup_secondary_ciu(void)
|
|
{
|
|
octeon_irq_init_ciu_percpu();
|
|
octeon_irq_percpu_enable();
|
|
|
|
/* Enable the CIU lines */
|
|
set_c0_status(STATUSF_IP3 | STATUSF_IP2);
|
|
if (octeon_irq_use_ip4)
|
|
set_c0_status(STATUSF_IP4);
|
|
else
|
|
clear_c0_status(STATUSF_IP4);
|
|
}
|
|
|
|
static void octeon_irq_setup_secondary_ciu2(void)
|
|
{
|
|
octeon_irq_init_ciu2_percpu();
|
|
octeon_irq_percpu_enable();
|
|
|
|
/* Enable the CIU lines */
|
|
set_c0_status(STATUSF_IP3 | STATUSF_IP2);
|
|
if (octeon_irq_use_ip4)
|
|
set_c0_status(STATUSF_IP4);
|
|
else
|
|
clear_c0_status(STATUSF_IP4);
|
|
}
|
|
|
|
static int __init octeon_irq_init_ciu(
|
|
struct device_node *ciu_node, struct device_node *parent)
|
|
{
|
|
unsigned int i, r;
|
|
struct irq_chip *chip;
|
|
struct irq_chip *chip_edge;
|
|
struct irq_chip *chip_mbox;
|
|
struct irq_chip *chip_wd;
|
|
struct irq_domain *ciu_domain = NULL;
|
|
struct octeon_irq_ciu_domain_data *dd;
|
|
|
|
dd = kzalloc(sizeof(*dd), GFP_KERNEL);
|
|
if (!dd)
|
|
return -ENOMEM;
|
|
|
|
octeon_irq_init_ciu_percpu();
|
|
octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu;
|
|
|
|
octeon_irq_ip2 = octeon_irq_ip2_ciu;
|
|
octeon_irq_ip3 = octeon_irq_ip3_ciu;
|
|
if ((OCTEON_IS_OCTEON2() || OCTEON_IS_OCTEON3())
|
|
&& !OCTEON_IS_MODEL(OCTEON_CN63XX)) {
|
|
octeon_irq_ip4 = octeon_irq_ip4_ciu;
|
|
dd->num_sum = 3;
|
|
octeon_irq_use_ip4 = true;
|
|
} else {
|
|
octeon_irq_ip4 = octeon_irq_ip4_mask;
|
|
dd->num_sum = 2;
|
|
octeon_irq_use_ip4 = false;
|
|
}
|
|
if (OCTEON_IS_MODEL(OCTEON_CN58XX_PASS2_X) ||
|
|
OCTEON_IS_MODEL(OCTEON_CN56XX_PASS2_X) ||
|
|
OCTEON_IS_MODEL(OCTEON_CN52XX_PASS2_X) ||
|
|
OCTEON_IS_OCTEON2() || OCTEON_IS_OCTEON3()) {
|
|
chip = &octeon_irq_chip_ciu_v2;
|
|
chip_edge = &octeon_irq_chip_ciu_v2_edge;
|
|
chip_mbox = &octeon_irq_chip_ciu_mbox_v2;
|
|
chip_wd = &octeon_irq_chip_ciu_wd_v2;
|
|
octeon_irq_gpio_chip = &octeon_irq_chip_ciu_gpio_v2;
|
|
} else {
|
|
chip = &octeon_irq_chip_ciu;
|
|
chip_edge = &octeon_irq_chip_ciu_edge;
|
|
chip_mbox = &octeon_irq_chip_ciu_mbox;
|
|
chip_wd = &octeon_irq_chip_ciu_wd;
|
|
octeon_irq_gpio_chip = &octeon_irq_chip_ciu_gpio;
|
|
}
|
|
octeon_irq_ciu_chip = chip;
|
|
octeon_irq_ciu_chip_edge = chip_edge;
|
|
|
|
/* Mips internal */
|
|
octeon_irq_init_core();
|
|
|
|
ciu_domain = irq_domain_add_tree(
|
|
ciu_node, &octeon_irq_domain_ciu_ops, dd);
|
|
irq_set_default_host(ciu_domain);
|
|
|
|
/* CIU_0 */
|
|
for (i = 0; i < 16; i++) {
|
|
r = octeon_irq_force_ciu_mapping(
|
|
ciu_domain, i + OCTEON_IRQ_WORKQ0, 0, i + 0);
|
|
if (r)
|
|
goto err;
|
|
}
|
|
|
|
r = octeon_irq_set_ciu_mapping(
|
|
OCTEON_IRQ_MBOX0, 0, 32, 0, chip_mbox, handle_percpu_irq);
|
|
if (r)
|
|
goto err;
|
|
r = octeon_irq_set_ciu_mapping(
|
|
OCTEON_IRQ_MBOX1, 0, 33, 0, chip_mbox, handle_percpu_irq);
|
|
if (r)
|
|
goto err;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
r = octeon_irq_force_ciu_mapping(
|
|
ciu_domain, i + OCTEON_IRQ_PCI_INT0, 0, i + 36);
|
|
if (r)
|
|
goto err;
|
|
}
|
|
for (i = 0; i < 4; i++) {
|
|
r = octeon_irq_force_ciu_mapping(
|
|
ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 0, i + 40);
|
|
if (r)
|
|
goto err;
|
|
}
|
|
|
|
r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI, 0, 45);
|
|
if (r)
|
|
goto err;
|
|
|
|
r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_RML, 0, 46);
|
|
if (r)
|
|
goto err;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
r = octeon_irq_force_ciu_mapping(
|
|
ciu_domain, i + OCTEON_IRQ_TIMER0, 0, i + 52);
|
|
if (r)
|
|
goto err;
|
|
}
|
|
|
|
r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB0, 0, 56);
|
|
if (r)
|
|
goto err;
|
|
|
|
r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI2, 0, 59);
|
|
if (r)
|
|
goto err;
|
|
|
|
/* CIU_1 */
|
|
for (i = 0; i < 16; i++) {
|
|
r = octeon_irq_set_ciu_mapping(
|
|
i + OCTEON_IRQ_WDOG0, 1, i + 0, 0, chip_wd,
|
|
handle_level_irq);
|
|
if (r)
|
|
goto err;
|
|
}
|
|
|
|
r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB1, 1, 17);
|
|
if (r)
|
|
goto err;
|
|
|
|
/* Enable the CIU lines */
|
|
set_c0_status(STATUSF_IP3 | STATUSF_IP2);
|
|
if (octeon_irq_use_ip4)
|
|
set_c0_status(STATUSF_IP4);
|
|
else
|
|
clear_c0_status(STATUSF_IP4);
|
|
|
|
return 0;
|
|
err:
|
|
return r;
|
|
}
|
|
|
|
static int __init octeon_irq_init_gpio(
|
|
struct device_node *gpio_node, struct device_node *parent)
|
|
{
|
|
struct octeon_irq_gpio_domain_data *gpiod;
|
|
u32 interrupt_cells;
|
|
unsigned int base_hwirq;
|
|
int r;
|
|
|
|
r = of_property_read_u32(parent, "#interrupt-cells", &interrupt_cells);
|
|
if (r)
|
|
return r;
|
|
|
|
if (interrupt_cells == 1) {
|
|
u32 v;
|
|
|
|
r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v);
|
|
if (r) {
|
|
pr_warn("No \"interrupts\" property.\n");
|
|
return r;
|
|
}
|
|
base_hwirq = v;
|
|
} else if (interrupt_cells == 2) {
|
|
u32 v0, v1;
|
|
|
|
r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v0);
|
|
if (r) {
|
|
pr_warn("No \"interrupts\" property.\n");
|
|
return r;
|
|
}
|
|
r = of_property_read_u32_index(gpio_node, "interrupts", 1, &v1);
|
|
if (r) {
|
|
pr_warn("No \"interrupts\" property.\n");
|
|
return r;
|
|
}
|
|
base_hwirq = (v0 << 6) | v1;
|
|
} else {
|
|
pr_warn("Bad \"#interrupt-cells\" property: %u\n",
|
|
interrupt_cells);
|
|
return -EINVAL;
|
|
}
|
|
|
|
gpiod = kzalloc(sizeof(*gpiod), GFP_KERNEL);
|
|
if (gpiod) {
|
|
/* gpio domain host_data is the base hwirq number. */
|
|
gpiod->base_hwirq = base_hwirq;
|
|
irq_domain_add_linear(
|
|
gpio_node, 16, &octeon_irq_domain_gpio_ops, gpiod);
|
|
} else {
|
|
pr_warn("Cannot allocate memory for GPIO irq_domain.\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/*
|
|
* Watchdog interrupts are special. They are associated with a single
|
|
* core, so we hardwire the affinity to that core.
|
|
*/
|
|
static void octeon_irq_ciu2_wd_enable(struct irq_data *data)
|
|
{
|
|
u64 mask;
|
|
u64 en_addr;
|
|
int coreid = data->irq - OCTEON_IRQ_WDOG0;
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << (cd->bit);
|
|
|
|
en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) +
|
|
(0x1000ull * cd->line);
|
|
cvmx_write_csr(en_addr, mask);
|
|
|
|
}
|
|
|
|
static void octeon_irq_ciu2_enable(struct irq_data *data)
|
|
{
|
|
u64 mask;
|
|
u64 en_addr;
|
|
int cpu = next_cpu_for_irq(data);
|
|
int coreid = octeon_coreid_for_cpu(cpu);
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << (cd->bit);
|
|
|
|
en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) +
|
|
(0x1000ull * cd->line);
|
|
cvmx_write_csr(en_addr, mask);
|
|
}
|
|
|
|
static void octeon_irq_ciu2_enable_local(struct irq_data *data)
|
|
{
|
|
u64 mask;
|
|
u64 en_addr;
|
|
int coreid = cvmx_get_core_num();
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << (cd->bit);
|
|
|
|
en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) +
|
|
(0x1000ull * cd->line);
|
|
cvmx_write_csr(en_addr, mask);
|
|
|
|
}
|
|
|
|
static void octeon_irq_ciu2_disable_local(struct irq_data *data)
|
|
{
|
|
u64 mask;
|
|
u64 en_addr;
|
|
int coreid = cvmx_get_core_num();
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << (cd->bit);
|
|
|
|
en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(coreid) +
|
|
(0x1000ull * cd->line);
|
|
cvmx_write_csr(en_addr, mask);
|
|
|
|
}
|
|
|
|
static void octeon_irq_ciu2_ack(struct irq_data *data)
|
|
{
|
|
u64 mask;
|
|
u64 en_addr;
|
|
int coreid = cvmx_get_core_num();
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << (cd->bit);
|
|
|
|
en_addr = CVMX_CIU2_RAW_PPX_IP2_WRKQ(coreid) + (0x1000ull * cd->line);
|
|
cvmx_write_csr(en_addr, mask);
|
|
|
|
}
|
|
|
|
static void octeon_irq_ciu2_disable_all(struct irq_data *data)
|
|
{
|
|
int cpu;
|
|
u64 mask;
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << (cd->bit);
|
|
|
|
for_each_online_cpu(cpu) {
|
|
u64 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(
|
|
octeon_coreid_for_cpu(cpu)) + (0x1000ull * cd->line);
|
|
cvmx_write_csr(en_addr, mask);
|
|
}
|
|
}
|
|
|
|
static void octeon_irq_ciu2_mbox_enable_all(struct irq_data *data)
|
|
{
|
|
int cpu;
|
|
u64 mask;
|
|
|
|
mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
|
|
|
|
for_each_online_cpu(cpu) {
|
|
u64 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1S(
|
|
octeon_coreid_for_cpu(cpu));
|
|
cvmx_write_csr(en_addr, mask);
|
|
}
|
|
}
|
|
|
|
static void octeon_irq_ciu2_mbox_disable_all(struct irq_data *data)
|
|
{
|
|
int cpu;
|
|
u64 mask;
|
|
|
|
mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
|
|
|
|
for_each_online_cpu(cpu) {
|
|
u64 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1C(
|
|
octeon_coreid_for_cpu(cpu));
|
|
cvmx_write_csr(en_addr, mask);
|
|
}
|
|
}
|
|
|
|
static void octeon_irq_ciu2_mbox_enable_local(struct irq_data *data)
|
|
{
|
|
u64 mask;
|
|
u64 en_addr;
|
|
int coreid = cvmx_get_core_num();
|
|
|
|
mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
|
|
en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1S(coreid);
|
|
cvmx_write_csr(en_addr, mask);
|
|
}
|
|
|
|
static void octeon_irq_ciu2_mbox_disable_local(struct irq_data *data)
|
|
{
|
|
u64 mask;
|
|
u64 en_addr;
|
|
int coreid = cvmx_get_core_num();
|
|
|
|
mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0);
|
|
en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1C(coreid);
|
|
cvmx_write_csr(en_addr, mask);
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
static int octeon_irq_ciu2_set_affinity(struct irq_data *data,
|
|
const struct cpumask *dest, bool force)
|
|
{
|
|
int cpu;
|
|
bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
|
|
u64 mask;
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
if (!enable_one)
|
|
return 0;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
mask = 1ull << cd->bit;
|
|
|
|
for_each_online_cpu(cpu) {
|
|
u64 en_addr;
|
|
if (cpumask_test_cpu(cpu, dest) && enable_one) {
|
|
enable_one = false;
|
|
en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(
|
|
octeon_coreid_for_cpu(cpu)) +
|
|
(0x1000ull * cd->line);
|
|
} else {
|
|
en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(
|
|
octeon_coreid_for_cpu(cpu)) +
|
|
(0x1000ull * cd->line);
|
|
}
|
|
cvmx_write_csr(en_addr, mask);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static void octeon_irq_ciu2_enable_gpio(struct irq_data *data)
|
|
{
|
|
octeon_irq_gpio_setup(data);
|
|
octeon_irq_ciu2_enable(data);
|
|
}
|
|
|
|
static void octeon_irq_ciu2_disable_gpio(struct irq_data *data)
|
|
{
|
|
struct octeon_ciu_chip_data *cd;
|
|
|
|
cd = irq_data_get_irq_chip_data(data);
|
|
|
|
cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0);
|
|
|
|
octeon_irq_ciu2_disable_all(data);
|
|
}
|
|
|
|
static struct irq_chip octeon_irq_chip_ciu2 = {
|
|
.name = "CIU2-E",
|
|
.irq_enable = octeon_irq_ciu2_enable,
|
|
.irq_disable = octeon_irq_ciu2_disable_all,
|
|
.irq_mask = octeon_irq_ciu2_disable_local,
|
|
.irq_unmask = octeon_irq_ciu2_enable,
|
|
#ifdef CONFIG_SMP
|
|
.irq_set_affinity = octeon_irq_ciu2_set_affinity,
|
|
.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
|
|
#endif
|
|
};
|
|
|
|
static struct irq_chip octeon_irq_chip_ciu2_edge = {
|
|
.name = "CIU2-E",
|
|
.irq_enable = octeon_irq_ciu2_enable,
|
|
.irq_disable = octeon_irq_ciu2_disable_all,
|
|
.irq_ack = octeon_irq_ciu2_ack,
|
|
.irq_mask = octeon_irq_ciu2_disable_local,
|
|
.irq_unmask = octeon_irq_ciu2_enable,
|
|
#ifdef CONFIG_SMP
|
|
.irq_set_affinity = octeon_irq_ciu2_set_affinity,
|
|
.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
|
|
#endif
|
|
};
|
|
|
|
static struct irq_chip octeon_irq_chip_ciu2_mbox = {
|
|
.name = "CIU2-M",
|
|
.irq_enable = octeon_irq_ciu2_mbox_enable_all,
|
|
.irq_disable = octeon_irq_ciu2_mbox_disable_all,
|
|
.irq_ack = octeon_irq_ciu2_mbox_disable_local,
|
|
.irq_eoi = octeon_irq_ciu2_mbox_enable_local,
|
|
|
|
.irq_cpu_online = octeon_irq_ciu2_mbox_enable_local,
|
|
.irq_cpu_offline = octeon_irq_ciu2_mbox_disable_local,
|
|
.flags = IRQCHIP_ONOFFLINE_ENABLED,
|
|
};
|
|
|
|
static struct irq_chip octeon_irq_chip_ciu2_wd = {
|
|
.name = "CIU2-W",
|
|
.irq_enable = octeon_irq_ciu2_wd_enable,
|
|
.irq_disable = octeon_irq_ciu2_disable_all,
|
|
.irq_mask = octeon_irq_ciu2_disable_local,
|
|
.irq_unmask = octeon_irq_ciu2_enable_local,
|
|
};
|
|
|
|
static struct irq_chip octeon_irq_chip_ciu2_gpio = {
|
|
.name = "CIU-GPIO",
|
|
.irq_enable = octeon_irq_ciu2_enable_gpio,
|
|
.irq_disable = octeon_irq_ciu2_disable_gpio,
|
|
.irq_ack = octeon_irq_ciu_gpio_ack,
|
|
.irq_mask = octeon_irq_ciu2_disable_local,
|
|
.irq_unmask = octeon_irq_ciu2_enable,
|
|
.irq_set_type = octeon_irq_ciu_gpio_set_type,
|
|
#ifdef CONFIG_SMP
|
|
.irq_set_affinity = octeon_irq_ciu2_set_affinity,
|
|
.irq_cpu_offline = octeon_irq_cpu_offline_ciu,
|
|
#endif
|
|
.flags = IRQCHIP_SET_TYPE_MASKED,
|
|
};
|
|
|
|
static int octeon_irq_ciu2_xlat(struct irq_domain *d,
|
|
struct device_node *node,
|
|
const u32 *intspec,
|
|
unsigned int intsize,
|
|
unsigned long *out_hwirq,
|
|
unsigned int *out_type)
|
|
{
|
|
unsigned int ciu, bit;
|
|
|
|
ciu = intspec[0];
|
|
bit = intspec[1];
|
|
|
|
*out_hwirq = (ciu << 6) | bit;
|
|
*out_type = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static bool octeon_irq_ciu2_is_edge(unsigned int line, unsigned int bit)
|
|
{
|
|
bool edge = false;
|
|
|
|
if (line == 3) /* MIO */
|
|
switch (bit) {
|
|
case 2: /* IPD_DRP */
|
|
case 8 ... 11: /* Timers */
|
|
case 48: /* PTP */
|
|
edge = true;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
else if (line == 6) /* PKT */
|
|
switch (bit) {
|
|
case 52 ... 53: /* ILK_DRP */
|
|
case 8 ... 12: /* GMX_DRP */
|
|
edge = true;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return edge;
|
|
}
|
|
|
|
static int octeon_irq_ciu2_map(struct irq_domain *d,
|
|
unsigned int virq, irq_hw_number_t hw)
|
|
{
|
|
unsigned int line = hw >> 6;
|
|
unsigned int bit = hw & 63;
|
|
|
|
if (!octeon_irq_virq_in_range(virq))
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Don't map irq if it is reserved for GPIO.
|
|
* (Line 7 are the GPIO lines.)
|
|
*/
|
|
if (line == 7)
|
|
return 0;
|
|
|
|
if (line > 7 || octeon_irq_ciu_to_irq[line][bit] != 0)
|
|
return -EINVAL;
|
|
|
|
if (octeon_irq_ciu2_is_edge(line, bit))
|
|
octeon_irq_set_ciu_mapping(virq, line, bit, 0,
|
|
&octeon_irq_chip_ciu2_edge,
|
|
handle_edge_irq);
|
|
else
|
|
octeon_irq_set_ciu_mapping(virq, line, bit, 0,
|
|
&octeon_irq_chip_ciu2,
|
|
handle_level_irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct irq_domain_ops octeon_irq_domain_ciu2_ops = {
|
|
.map = octeon_irq_ciu2_map,
|
|
.unmap = octeon_irq_free_cd,
|
|
.xlate = octeon_irq_ciu2_xlat,
|
|
};
|
|
|
|
static void octeon_irq_ciu2(void)
|
|
{
|
|
int line;
|
|
int bit;
|
|
int irq;
|
|
u64 src_reg, src, sum;
|
|
const unsigned long core_id = cvmx_get_core_num();
|
|
|
|
sum = cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP2(core_id)) & 0xfful;
|
|
|
|
if (unlikely(!sum))
|
|
goto spurious;
|
|
|
|
line = fls64(sum) - 1;
|
|
src_reg = CVMX_CIU2_SRC_PPX_IP2_WRKQ(core_id) + (0x1000 * line);
|
|
src = cvmx_read_csr(src_reg);
|
|
|
|
if (unlikely(!src))
|
|
goto spurious;
|
|
|
|
bit = fls64(src) - 1;
|
|
irq = octeon_irq_ciu_to_irq[line][bit];
|
|
if (unlikely(!irq))
|
|
goto spurious;
|
|
|
|
do_IRQ(irq);
|
|
goto out;
|
|
|
|
spurious:
|
|
spurious_interrupt();
|
|
out:
|
|
/* CN68XX pass 1.x has an errata that accessing the ACK registers
|
|
can stop interrupts from propagating */
|
|
if (OCTEON_IS_MODEL(OCTEON_CN68XX))
|
|
cvmx_read_csr(CVMX_CIU2_INTR_CIU_READY);
|
|
else
|
|
cvmx_read_csr(CVMX_CIU2_ACK_PPX_IP2(core_id));
|
|
return;
|
|
}
|
|
|
|
static void octeon_irq_ciu2_mbox(void)
|
|
{
|
|
int line;
|
|
|
|
const unsigned long core_id = cvmx_get_core_num();
|
|
u64 sum = cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP3(core_id)) >> 60;
|
|
|
|
if (unlikely(!sum))
|
|
goto spurious;
|
|
|
|
line = fls64(sum) - 1;
|
|
|
|
do_IRQ(OCTEON_IRQ_MBOX0 + line);
|
|
goto out;
|
|
|
|
spurious:
|
|
spurious_interrupt();
|
|
out:
|
|
/* CN68XX pass 1.x has an errata that accessing the ACK registers
|
|
can stop interrupts from propagating */
|
|
if (OCTEON_IS_MODEL(OCTEON_CN68XX))
|
|
cvmx_read_csr(CVMX_CIU2_INTR_CIU_READY);
|
|
else
|
|
cvmx_read_csr(CVMX_CIU2_ACK_PPX_IP3(core_id));
|
|
return;
|
|
}
|
|
|
|
static int __init octeon_irq_init_ciu2(
|
|
struct device_node *ciu_node, struct device_node *parent)
|
|
{
|
|
unsigned int i, r;
|
|
struct irq_domain *ciu_domain = NULL;
|
|
|
|
octeon_irq_init_ciu2_percpu();
|
|
octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu2;
|
|
|
|
octeon_irq_gpio_chip = &octeon_irq_chip_ciu2_gpio;
|
|
octeon_irq_ip2 = octeon_irq_ciu2;
|
|
octeon_irq_ip3 = octeon_irq_ciu2_mbox;
|
|
octeon_irq_ip4 = octeon_irq_ip4_mask;
|
|
|
|
/* Mips internal */
|
|
octeon_irq_init_core();
|
|
|
|
ciu_domain = irq_domain_add_tree(
|
|
ciu_node, &octeon_irq_domain_ciu2_ops, NULL);
|
|
irq_set_default_host(ciu_domain);
|
|
|
|
/* CUI2 */
|
|
for (i = 0; i < 64; i++) {
|
|
r = octeon_irq_force_ciu_mapping(
|
|
ciu_domain, i + OCTEON_IRQ_WORKQ0, 0, i);
|
|
if (r)
|
|
goto err;
|
|
}
|
|
|
|
for (i = 0; i < 32; i++) {
|
|
r = octeon_irq_set_ciu_mapping(i + OCTEON_IRQ_WDOG0, 1, i, 0,
|
|
&octeon_irq_chip_ciu2_wd, handle_level_irq);
|
|
if (r)
|
|
goto err;
|
|
}
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
r = octeon_irq_force_ciu_mapping(
|
|
ciu_domain, i + OCTEON_IRQ_TIMER0, 3, i + 8);
|
|
if (r)
|
|
goto err;
|
|
}
|
|
|
|
r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB0, 3, 44);
|
|
if (r)
|
|
goto err;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
r = octeon_irq_force_ciu_mapping(
|
|
ciu_domain, i + OCTEON_IRQ_PCI_INT0, 4, i);
|
|
if (r)
|
|
goto err;
|
|
}
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
r = octeon_irq_force_ciu_mapping(
|
|
ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 4, i + 8);
|
|
if (r)
|
|
goto err;
|
|
}
|
|
|
|
irq_set_chip_and_handler(OCTEON_IRQ_MBOX0, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
|
|
irq_set_chip_and_handler(OCTEON_IRQ_MBOX1, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
|
|
irq_set_chip_and_handler(OCTEON_IRQ_MBOX2, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
|
|
irq_set_chip_and_handler(OCTEON_IRQ_MBOX3, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq);
|
|
|
|
/* Enable the CIU lines */
|
|
set_c0_status(STATUSF_IP3 | STATUSF_IP2);
|
|
clear_c0_status(STATUSF_IP4);
|
|
return 0;
|
|
err:
|
|
return r;
|
|
}
|
|
|
|
struct octeon_irq_cib_host_data {
|
|
raw_spinlock_t lock;
|
|
u64 raw_reg;
|
|
u64 en_reg;
|
|
int max_bits;
|
|
};
|
|
|
|
struct octeon_irq_cib_chip_data {
|
|
struct octeon_irq_cib_host_data *host_data;
|
|
int bit;
|
|
};
|
|
|
|
static void octeon_irq_cib_enable(struct irq_data *data)
|
|
{
|
|
unsigned long flags;
|
|
u64 en;
|
|
struct octeon_irq_cib_chip_data *cd = irq_data_get_irq_chip_data(data);
|
|
struct octeon_irq_cib_host_data *host_data = cd->host_data;
|
|
|
|
raw_spin_lock_irqsave(&host_data->lock, flags);
|
|
en = cvmx_read_csr(host_data->en_reg);
|
|
en |= 1ull << cd->bit;
|
|
cvmx_write_csr(host_data->en_reg, en);
|
|
raw_spin_unlock_irqrestore(&host_data->lock, flags);
|
|
}
|
|
|
|
static void octeon_irq_cib_disable(struct irq_data *data)
|
|
{
|
|
unsigned long flags;
|
|
u64 en;
|
|
struct octeon_irq_cib_chip_data *cd = irq_data_get_irq_chip_data(data);
|
|
struct octeon_irq_cib_host_data *host_data = cd->host_data;
|
|
|
|
raw_spin_lock_irqsave(&host_data->lock, flags);
|
|
en = cvmx_read_csr(host_data->en_reg);
|
|
en &= ~(1ull << cd->bit);
|
|
cvmx_write_csr(host_data->en_reg, en);
|
|
raw_spin_unlock_irqrestore(&host_data->lock, flags);
|
|
}
|
|
|
|
static int octeon_irq_cib_set_type(struct irq_data *data, unsigned int t)
|
|
{
|
|
irqd_set_trigger_type(data, t);
|
|
return IRQ_SET_MASK_OK;
|
|
}
|
|
|
|
static struct irq_chip octeon_irq_chip_cib = {
|
|
.name = "CIB",
|
|
.irq_enable = octeon_irq_cib_enable,
|
|
.irq_disable = octeon_irq_cib_disable,
|
|
.irq_mask = octeon_irq_cib_disable,
|
|
.irq_unmask = octeon_irq_cib_enable,
|
|
.irq_set_type = octeon_irq_cib_set_type,
|
|
};
|
|
|
|
static int octeon_irq_cib_xlat(struct irq_domain *d,
|
|
struct device_node *node,
|
|
const u32 *intspec,
|
|
unsigned int intsize,
|
|
unsigned long *out_hwirq,
|
|
unsigned int *out_type)
|
|
{
|
|
unsigned int type = 0;
|
|
|
|
if (intsize == 2)
|
|
type = intspec[1];
|
|
|
|
switch (type) {
|
|
case 0: /* unofficial value, but we might as well let it work. */
|
|
case 4: /* official value for level triggering. */
|
|
*out_type = IRQ_TYPE_LEVEL_HIGH;
|
|
break;
|
|
case 1: /* official value for edge triggering. */
|
|
*out_type = IRQ_TYPE_EDGE_RISING;
|
|
break;
|
|
default: /* Nothing else is acceptable. */
|
|
return -EINVAL;
|
|
}
|
|
|
|
*out_hwirq = intspec[0];
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int octeon_irq_cib_map(struct irq_domain *d,
|
|
unsigned int virq, irq_hw_number_t hw)
|
|
{
|
|
struct octeon_irq_cib_host_data *host_data = d->host_data;
|
|
struct octeon_irq_cib_chip_data *cd;
|
|
|
|
if (hw >= host_data->max_bits) {
|
|
pr_err("ERROR: %s mapping %u is to big!\n",
|
|
d->of_node->name, (unsigned)hw);
|
|
return -EINVAL;
|
|
}
|
|
|
|
cd = kzalloc(sizeof(*cd), GFP_KERNEL);
|
|
cd->host_data = host_data;
|
|
cd->bit = hw;
|
|
|
|
irq_set_chip_and_handler(virq, &octeon_irq_chip_cib,
|
|
handle_simple_irq);
|
|
irq_set_chip_data(virq, cd);
|
|
return 0;
|
|
}
|
|
|
|
static struct irq_domain_ops octeon_irq_domain_cib_ops = {
|
|
.map = octeon_irq_cib_map,
|
|
.unmap = octeon_irq_free_cd,
|
|
.xlate = octeon_irq_cib_xlat,
|
|
};
|
|
|
|
/* Chain to real handler. */
|
|
static irqreturn_t octeon_irq_cib_handler(int my_irq, void *data)
|
|
{
|
|
u64 en;
|
|
u64 raw;
|
|
u64 bits;
|
|
int i;
|
|
int irq;
|
|
struct irq_domain *cib_domain = data;
|
|
struct octeon_irq_cib_host_data *host_data = cib_domain->host_data;
|
|
|
|
en = cvmx_read_csr(host_data->en_reg);
|
|
raw = cvmx_read_csr(host_data->raw_reg);
|
|
|
|
bits = en & raw;
|
|
|
|
for (i = 0; i < host_data->max_bits; i++) {
|
|
if ((bits & 1ull << i) == 0)
|
|
continue;
|
|
irq = irq_find_mapping(cib_domain, i);
|
|
if (!irq) {
|
|
unsigned long flags;
|
|
|
|
pr_err("ERROR: CIB bit %d@%llx IRQ unhandled, disabling\n",
|
|
i, host_data->raw_reg);
|
|
raw_spin_lock_irqsave(&host_data->lock, flags);
|
|
en = cvmx_read_csr(host_data->en_reg);
|
|
en &= ~(1ull << i);
|
|
cvmx_write_csr(host_data->en_reg, en);
|
|
cvmx_write_csr(host_data->raw_reg, 1ull << i);
|
|
raw_spin_unlock_irqrestore(&host_data->lock, flags);
|
|
} else {
|
|
struct irq_desc *desc = irq_to_desc(irq);
|
|
struct irq_data *irq_data = irq_desc_get_irq_data(desc);
|
|
/* If edge, acknowledge the bit we will be sending. */
|
|
if (irqd_get_trigger_type(irq_data) &
|
|
IRQ_TYPE_EDGE_BOTH)
|
|
cvmx_write_csr(host_data->raw_reg, 1ull << i);
|
|
generic_handle_irq_desc(irq, desc);
|
|
}
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int __init octeon_irq_init_cib(struct device_node *ciu_node,
|
|
struct device_node *parent)
|
|
{
|
|
const __be32 *addr;
|
|
u32 val;
|
|
struct octeon_irq_cib_host_data *host_data;
|
|
int parent_irq;
|
|
int r;
|
|
struct irq_domain *cib_domain;
|
|
|
|
parent_irq = irq_of_parse_and_map(ciu_node, 0);
|
|
if (!parent_irq) {
|
|
pr_err("ERROR: Couldn't acquire parent_irq for %s\n.",
|
|
ciu_node->name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
host_data = kzalloc(sizeof(*host_data), GFP_KERNEL);
|
|
raw_spin_lock_init(&host_data->lock);
|
|
|
|
addr = of_get_address(ciu_node, 0, NULL, NULL);
|
|
if (!addr) {
|
|
pr_err("ERROR: Couldn't acquire reg(0) %s\n.", ciu_node->name);
|
|
return -EINVAL;
|
|
}
|
|
host_data->raw_reg = (u64)phys_to_virt(
|
|
of_translate_address(ciu_node, addr));
|
|
|
|
addr = of_get_address(ciu_node, 1, NULL, NULL);
|
|
if (!addr) {
|
|
pr_err("ERROR: Couldn't acquire reg(1) %s\n.", ciu_node->name);
|
|
return -EINVAL;
|
|
}
|
|
host_data->en_reg = (u64)phys_to_virt(
|
|
of_translate_address(ciu_node, addr));
|
|
|
|
r = of_property_read_u32(ciu_node, "cavium,max-bits", &val);
|
|
if (r) {
|
|
pr_err("ERROR: Couldn't read cavium,max-bits from %s\n.",
|
|
ciu_node->name);
|
|
return r;
|
|
}
|
|
host_data->max_bits = val;
|
|
|
|
cib_domain = irq_domain_add_linear(ciu_node, host_data->max_bits,
|
|
&octeon_irq_domain_cib_ops,
|
|
host_data);
|
|
if (!cib_domain) {
|
|
pr_err("ERROR: Couldn't irq_domain_add_linear()\n.");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
cvmx_write_csr(host_data->en_reg, 0); /* disable all IRQs */
|
|
cvmx_write_csr(host_data->raw_reg, ~0); /* ack any outstanding */
|
|
|
|
r = request_irq(parent_irq, octeon_irq_cib_handler,
|
|
IRQF_NO_THREAD, "cib", cib_domain);
|
|
if (r) {
|
|
pr_err("request_irq cib failed %d\n", r);
|
|
return r;
|
|
}
|
|
pr_info("CIB interrupt controller probed: %llx %d\n",
|
|
host_data->raw_reg, host_data->max_bits);
|
|
return 0;
|
|
}
|
|
|
|
static struct of_device_id ciu_types[] __initdata = {
|
|
{.compatible = "cavium,octeon-3860-ciu", .data = octeon_irq_init_ciu},
|
|
{.compatible = "cavium,octeon-3860-gpio", .data = octeon_irq_init_gpio},
|
|
{.compatible = "cavium,octeon-6880-ciu2", .data = octeon_irq_init_ciu2},
|
|
{.compatible = "cavium,octeon-7130-cib", .data = octeon_irq_init_cib},
|
|
{}
|
|
};
|
|
|
|
void __init arch_init_irq(void)
|
|
{
|
|
#ifdef CONFIG_SMP
|
|
/* Set the default affinity to the boot cpu. */
|
|
cpumask_clear(irq_default_affinity);
|
|
cpumask_set_cpu(smp_processor_id(), irq_default_affinity);
|
|
#endif
|
|
of_irq_init(ciu_types);
|
|
}
|
|
|
|
asmlinkage void plat_irq_dispatch(void)
|
|
{
|
|
unsigned long cop0_cause;
|
|
unsigned long cop0_status;
|
|
|
|
while (1) {
|
|
cop0_cause = read_c0_cause();
|
|
cop0_status = read_c0_status();
|
|
cop0_cause &= cop0_status;
|
|
cop0_cause &= ST0_IM;
|
|
|
|
if (cop0_cause & STATUSF_IP2)
|
|
octeon_irq_ip2();
|
|
else if (cop0_cause & STATUSF_IP3)
|
|
octeon_irq_ip3();
|
|
else if (cop0_cause & STATUSF_IP4)
|
|
octeon_irq_ip4();
|
|
else if (cop0_cause)
|
|
do_IRQ(fls(cop0_cause) - 9 + MIPS_CPU_IRQ_BASE);
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
|
|
void octeon_fixup_irqs(void)
|
|
{
|
|
irq_cpu_offline();
|
|
}
|
|
|
|
#endif /* CONFIG_HOTPLUG_CPU */
|