/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2004-2016 Cavium, Inc.
 */

#include <linux/of_address.h>
#include <linux/interrupt.h>
#include <linux/irqdomain.h>
#include <linux/bitops.h>
#include <linux/of_irq.h>
#include <linux/percpu.h>
#include <linux/slab.h>
#include <linux/irq.h>
#include <linux/smp.h>
#include <linux/of.h>

#include <asm/octeon/octeon.h>
#include <asm/octeon/cvmx-ciu2-defs.h>
#include <asm/octeon/cvmx-ciu3-defs.h>

static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu0_en_mirror);
static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu1_en_mirror);
static DEFINE_PER_CPU(raw_spinlock_t, octeon_irq_ciu_spinlock);
static DEFINE_PER_CPU(unsigned int, octeon_irq_ciu3_idt_ip2);

static DEFINE_PER_CPU(unsigned int, octeon_irq_ciu3_idt_ip3);
static DEFINE_PER_CPU(struct octeon_ciu3_info *, octeon_ciu3_info);
#define CIU3_MBOX_PER_CORE 10

/*
 * The 8 most significant bits of the intsn identify the interrupt major block.
 * Each major block might use its own interrupt domain. Thus 256 domains are
 * needed.
 */
#define MAX_CIU3_DOMAINS                256

typedef irq_hw_number_t (*octeon_ciu3_intsn2hw_t)(struct irq_domain *, unsigned int);

/* Information for each ciu3 in the system */
struct octeon_ciu3_info {
        u64                     ciu3_addr;
        int                     node;
        struct irq_domain       *domain[MAX_CIU3_DOMAINS];
        octeon_ciu3_intsn2hw_t  intsn2hw[MAX_CIU3_DOMAINS];
};

/* Each ciu3 in the system uses its own data (one ciu3 per node) */
static struct octeon_ciu3_info  *octeon_ciu3_info_per_node[4];

struct octeon_irq_ciu_domain_data {
        int num_sum;  /* number of sum registers (2 or 3). */
};

/* Register offsets from ciu3_addr */
#define CIU3_CONST              0x220
#define CIU3_IDT_CTL(_idt)      ((_idt) * 8 + 0x110000)
#define CIU3_IDT_PP(_idt, _idx) ((_idt) * 32 + (_idx) * 8 + 0x120000)
#define CIU3_IDT_IO(_idt)       ((_idt) * 8 + 0x130000)
#define CIU3_DEST_PP_INT(_pp_ip) ((_pp_ip) * 8 + 0x200000)
#define CIU3_DEST_IO_INT(_io)   ((_io) * 8 + 0x210000)
#define CIU3_ISC_CTL(_intsn)    ((_intsn) * 8 + 0x80000000)
#define CIU3_ISC_W1C(_intsn)    ((_intsn) * 8 + 0x90000000)
#define CIU3_ISC_W1S(_intsn)    ((_intsn) * 8 + 0xa0000000)

static __read_mostly int octeon_irq_ciu_to_irq[8][64];

struct octeon_ciu_chip_data {
        union {
                struct {                /* only used for ciu3 */
                        u64 ciu3_addr;
                        unsigned int intsn;
                };
                struct {                /* only used for ciu/ciu2 */
                        u8 line;
                        u8 bit;
                };
        };
        int gpio_line;
        int current_cpu;        /* Next CPU expected to take this irq */
        int ciu_node; /* NUMA node number of the CIU */
};

struct octeon_core_chip_data {
        struct mutex core_irq_mutex;
        bool current_en;
        bool desired_en;
        u8 bit;
};

#define MIPS_CORE_IRQ_LINES 8

static struct octeon_core_chip_data octeon_irq_core_chip_data[MIPS_CORE_IRQ_LINES];

static int octeon_irq_set_ciu_mapping(int irq, int line, int bit, int gpio_line,
                                      struct irq_chip *chip,
                                      irq_flow_handler_t handler)
{
        struct octeon_ciu_chip_data *cd;

        cd = kzalloc(sizeof(*cd), GFP_KERNEL);
        if (!cd)
                return -ENOMEM;

        irq_set_chip_and_handler(irq, chip, handler);

        cd->line = line;
        cd->bit = bit;
        cd->gpio_line = gpio_line;

        irq_set_chip_data(irq, cd);
        octeon_irq_ciu_to_irq[line][bit] = irq;
        return 0;
}

static void octeon_irq_free_cd(struct irq_domain *d, unsigned int irq)
{
        struct irq_data *data = irq_get_irq_data(irq);
        struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data);

        irq_set_chip_data(irq, NULL);
        kfree(cd);
}

static int octeon_irq_force_ciu_mapping(struct irq_domain *domain,
                                        int irq, int line, int bit)
{
        return irq_domain_associate(domain, irq, line << 6 | bit);
}

static int octeon_coreid_for_cpu(int cpu)
{
#ifdef CONFIG_SMP
        return cpu_logical_map(cpu);
#else
        return cvmx_get_core_num();
#endif
}

static int octeon_cpu_for_coreid(int coreid)
{
#ifdef CONFIG_SMP
        return cpu_number_map(coreid);
#else
        return smp_processor_id();
#endif
}

static void octeon_irq_core_ack(struct irq_data *data)
{
        struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
        unsigned int bit = cd->bit;

        /*
         * We don't need to disable IRQs to make these atomic since
         * they are already disabled earlier in the low level
         * interrupt code.
         */
        clear_c0_status(0x100 << bit);
        /* The two user interrupts must be cleared manually. */
        if (bit < 2)
                clear_c0_cause(0x100 << bit);
}

static void octeon_irq_core_eoi(struct irq_data *data)
{
        struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);

        /*
         * We don't need to disable IRQs to make these atomic since
         * they are already disabled earlier in the low level
         * interrupt code.
         */
        set_c0_status(0x100 << cd->bit);
}

static void octeon_irq_core_set_enable_local(void *arg)
{
        struct irq_data *data = arg;
        struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
        unsigned int mask = 0x100 << cd->bit;

        /*
         * Interrupts are already disabled, so these are atomic.
         */
        if (cd->desired_en)
                set_c0_status(mask);
        else
                clear_c0_status(mask);

}

static void octeon_irq_core_disable(struct irq_data *data)
{
        struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
        cd->desired_en = false;
}

static void octeon_irq_core_enable(struct irq_data *data)
{
        struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);
        cd->desired_en = true;
}

static void octeon_irq_core_bus_lock(struct irq_data *data)
{
        struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);

        mutex_lock(&cd->core_irq_mutex);
}

static void octeon_irq_core_bus_sync_unlock(struct irq_data *data)
{
        struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data);

        if (cd->desired_en != cd->current_en) {
                on_each_cpu(octeon_irq_core_set_enable_local, data, 1);

                cd->current_en = cd->desired_en;
        }

        mutex_unlock(&cd->core_irq_mutex);
}

static struct irq_chip octeon_irq_chip_core = {
        .name = "Core",
        .irq_enable = octeon_irq_core_enable,
        .irq_disable = octeon_irq_core_disable,
        .irq_ack = octeon_irq_core_ack,
        .irq_eoi = octeon_irq_core_eoi,
        .irq_bus_lock = octeon_irq_core_bus_lock,
        .irq_bus_sync_unlock = octeon_irq_core_bus_sync_unlock,

        .irq_cpu_online = octeon_irq_core_eoi,
        .irq_cpu_offline = octeon_irq_core_ack,
        .flags = IRQCHIP_ONOFFLINE_ENABLED,
};

static void __init octeon_irq_init_core(void)
{
        int i;
        int irq;
        struct octeon_core_chip_data *cd;

        for (i = 0; i < MIPS_CORE_IRQ_LINES; i++) {
                cd = &octeon_irq_core_chip_data[i];
                cd->current_en = false;
                cd->desired_en = false;
                cd->bit = i;
                mutex_init(&cd->core_irq_mutex);

                irq = OCTEON_IRQ_SW0 + i;
                irq_set_chip_data(irq, cd);
                irq_set_chip_and_handler(irq, &octeon_irq_chip_core,
                                         handle_percpu_irq);
        }
}

static int next_cpu_for_irq(struct irq_data *data)
{

#ifdef CONFIG_SMP
        int cpu;
        struct cpumask *mask = irq_data_get_affinity_mask(data);
        int weight = cpumask_weight(mask);
        struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data);

        if (weight > 1) {
                cpu = cd->current_cpu;
                for (;;) {
                        cpu = cpumask_next(cpu, mask);
                        if (cpu >= nr_cpu_ids) {
                                cpu = -1;
                                continue;
                        } else if (cpumask_test_cpu(cpu, cpu_online_mask)) {
                                break;
                        }
                }
        } else if (weight == 1) {
                cpu = cpumask_first(mask);
        } else {
                cpu = smp_processor_id();
        }
        cd->current_cpu = cpu;
        return cpu;
#else
        return smp_processor_id();
#endif
}

static void octeon_irq_ciu_enable(struct irq_data *data)
{
        int cpu = next_cpu_for_irq(data);
        int coreid = octeon_coreid_for_cpu(cpu);
        unsigned long *pen;
        unsigned long flags;
        struct octeon_ciu_chip_data *cd;
        raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);

        cd = irq_data_get_irq_chip_data(data);

        raw_spin_lock_irqsave(lock, flags);
        if (cd->line == 0) {
                pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
                __set_bit(cd->bit, pen);
                /*
                 * Must be visible to octeon_irq_ip{2,3}_ciu() before
                 * enabling the irq.
                 */
                wmb();
                cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen);
        } else {
                pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);
                __set_bit(cd->bit, 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);
}

static void octeon_irq_ciu_enable_local(struct irq_data *data)
{
        unsigned long *pen;
        unsigned long flags;
        struct octeon_ciu_chip_data *cd;
        raw_spinlock_t *lock = this_cpu_ptr(&octeon_irq_ciu_spinlock);

        cd = irq_data_get_irq_chip_data(data);

        raw_spin_lock_irqsave(lock, flags);
        if (cd->line == 0) {
                pen = this_cpu_ptr(&octeon_irq_ciu0_en_mirror);
                __set_bit(cd->bit, pen);
                /*
                 * Must be visible to octeon_irq_ip{2,3}_ciu() before
                 * enabling the irq.
                 */
                wmb();
                cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2), *pen);
        } else {
                pen = this_cpu_ptr(&octeon_irq_ciu1_en_mirror);
                __set_bit(cd->bit, pen);
                /*
                 * Must be visible to octeon_irq_ip{2,3}_ciu() before
                 * enabling the irq.
                 */
                wmb();
                cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1), *pen);
        }
        raw_spin_unlock_irqrestore(lock, flags);
}

static void octeon_irq_ciu_disable_local(struct irq_data *data)
{
        unsigned long *pen;
        unsigned long flags;
        struct octeon_ciu_chip_data *cd;
        raw_spinlock_t *lock = this_cpu_ptr(&octeon_irq_ciu_spinlock);

        cd = irq_data_get_irq_chip_data(data);

        raw_spin_lock_irqsave(lock, flags);
        if (cd->line == 0) {
                pen = this_cpu_ptr(&octeon_irq_ciu0_en_mirror);
                __clear_bit(cd->bit, pen);
                /*
                 * Must be visible to octeon_irq_ip{2,3}_ciu() before
                 * enabling the irq.
                 */
                wmb();
                cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2), *pen);
        } else {
                pen = this_cpu_ptr(&octeon_irq_ciu1_en_mirror);
                __clear_bit(cd->bit, pen);
                /*
                 * Must be visible to octeon_irq_ip{2,3}_ciu() before
                 * enabling the irq.
                 */
                wmb();
                cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1), *pen);
        }
        raw_spin_unlock_irqrestore(lock, flags);
}

static void octeon_irq_ciu_disable_all(struct irq_data *data)
{
        unsigned long flags;
        unsigned long *pen;
        int cpu;
        struct octeon_ciu_chip_data *cd;
        raw_spinlock_t *lock;

        cd = irq_data_get_irq_chip_data(data);

        for_each_online_cpu(cpu) {
                int coreid = octeon_coreid_for_cpu(cpu);
                lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
                if (cd->line == 0)
                        pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
                else
                        pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);

                raw_spin_lock_irqsave(lock, flags);
                __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);
        }
}

static void octeon_irq_ciu_enable_all(struct irq_data *data)
{
        unsigned long flags;
        unsigned long *pen;
        int cpu;
        struct octeon_ciu_chip_data *cd;
        raw_spinlock_t *lock;

        cd = irq_data_get_irq_chip_data(data);

        for_each_online_cpu(cpu) {
                int coreid = octeon_coreid_for_cpu(cpu);
                lock = &per_cpu(octeon_irq_ciu_spinlock, cpu);
                if (cd->line == 0)
                        pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu);
                else
                        pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu);

                raw_spin_lock_irqsave(lock, flags);
                __set_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);
        }
}

/*
 * Enable the irq on the next core in the affinity set for chips that
 * have the EN*_W1{S,C} registers.
 */
static void octeon_irq_ciu_enable_v2(struct irq_data *data)
{
        u64 mask;
        int cpu = next_cpu_for_irq(data);
        struct octeon_ciu_chip_data *cd;

        cd = irq_data_get_irq_chip_data(data);
        mask = 1ull << (cd->bit);

        /*
         * Called under the desc lock, so these should never get out
         * of sync.
         */
        if (cd->line == 0) {
                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 {
                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);
        }
}

/*
 * Enable the irq in the sum2 registers.
 */
static void octeon_irq_ciu_enable_sum2(struct irq_data *data)
{
        u64 mask;
        int cpu = next_cpu_for_irq(data);
        int index = octeon_coreid_for_cpu(cpu);
        struct octeon_ciu_chip_data *cd;

        cd = irq_data_get_irq_chip_data(data);
        mask = 1ull << (cd->bit);

        cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1S(index), mask);
}

/*
 * Disable the irq in the sum2 registers.
 */
static void octeon_irq_ciu_disable_local_sum2(struct irq_data *data)
{
        u64 mask;
        int cpu = next_cpu_for_irq(data);
        int index = octeon_coreid_for_cpu(cpu);
        struct octeon_ciu_chip_data *cd;

        cd = irq_data_get_irq_chip_data(data);
        mask = 1ull << (cd->bit);

        cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(index), mask);
}

static void octeon_irq_ciu_ack_sum2(struct irq_data *data)
{
        u64 mask;
        int cpu = next_cpu_for_irq(data);
        int index = octeon_coreid_for_cpu(cpu);
        struct octeon_ciu_chip_data *cd;

        cd = irq_data_get_irq_chip_data(data);
        mask = 1ull << (cd->bit);

        cvmx_write_csr(CVMX_CIU_SUM2_PPX_IP4(index), mask);
}

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 int octeon_irq_ciu_set_type(struct irq_data *data, unsigned int t)
{
        irqd_set_trigger_type(data, t);

        if (t & IRQ_TYPE_EDGE_BOTH)
                irq_set_handler_locked(data, handle_edge_irq);
        else
                irq_set_handler_locked(data, handle_level_irq);

        return IRQ_SET_MASK_OK;
}

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);

        if (t & IRQ_TYPE_EDGE_BOTH)
                irq_set_handler_locked(data, handle_edge_irq);
        else
                irq_set_handler_locked(data, handle_level_irq);

        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);
}

#ifdef CONFIG_SMP

static void octeon_irq_cpu_offline_ciu(struct irq_data *data)
{
        int cpu = smp_processor_id();
        cpumask_t new_affinity;
        struct cpumask *mask = irq_data_get_affinity_mask(data);

        if (!cpumask_test_cpu(cpu, mask))
                return;

        if (cpumask_weight(mask) > 1) {
                /*
                 * It has multi CPU affinity, just remove this CPU
                 * from the affinity set.
                 */
                cpumask_copy(&new_affinity, mask);
                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 = false;
                        __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

static unsigned int edge_startup(struct irq_data *data)
{
        /* ack any pending edge-irq at startup, so there is
         * an _edge_ to fire on when the event reappears.
         */
        data->chip->irq_ack(data);
        data->chip->irq_enable(data);
        return 0;
}

/*
 * 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 (irq_domain_get_of_node(d) != 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: (%pOFn) Invalid irq trigger specification: %x\n",
                       node,
                       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 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 (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;

        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;

        /*
         * Default to handle_level_irq. If the DT contains a different
         * trigger type, it will call the irq_set_type callback and
         * the handler gets updated.
         */
        r = octeon_irq_set_ciu_mapping(virq, line, bit, hw,
                                       octeon_irq_gpio_chip, handle_level_irq);
        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)
{
        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 = irq_alloc_desc_at(OCTEON_IRQ_MBOX0, -1);
        if (r < 0) {
                pr_err("Failed to allocate desc for %s\n", "OCTEON_IRQ_MBOX0");
                goto err;
        }
        r = octeon_irq_set_ciu_mapping(
                OCTEON_IRQ_MBOX0, 0, 32, 0, chip_mbox, handle_percpu_irq);
        if (r)
                goto err;
        r = irq_alloc_desc_at(OCTEON_IRQ_MBOX1, -1);
        if (r < 0) {
                pr_err("Failed to allocate desc for %s\n", "OCTEON_IRQ_MBOX1");
                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_TWSI2, 0, 59);
        if (r)
                goto err;

        r = irq_alloc_descs(OCTEON_IRQ_WDOG0, OCTEON_IRQ_WDOG0, 16, -1);
        if (r < 0) {
                pr_err("Failed to allocate desc for %s\n", "OCTEON_IRQ_WDOGx");
                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;
        }

        /* 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;
        }

        /*
         * Clear the OF_POPULATED flag that was set by of_irq_init()
         * so that all GPIO devices will be probed.
         */
        of_node_clear_flag(gpio_node, OF_POPULATED);

        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;

        /*
         * 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;
        }

        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 too big!\n",
                       irq_domain_get_of_node(d)->name, (unsigned)hw);
                return -EINVAL;
        }

        cd = kzalloc(sizeof(*cd), GFP_KERNEL);
        if (!cd)
                return -ENOMEM;

        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(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 %pOFn\n",
                        ciu_node);
                return -EINVAL;
        }

        host_data = kzalloc(sizeof(*host_data), GFP_KERNEL);
        if (!host_data)
                return -ENOMEM;
        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) %pOFn\n", ciu_node);
                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) %pOFn\n", ciu_node);
                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 %pOFn\n",
                        ciu_node);
                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;
}

int octeon_irq_ciu3_xlat(struct irq_domain *d,
                         struct device_node *node,
                         const u32 *intspec,
                         unsigned int intsize,
                         unsigned long *out_hwirq,
                         unsigned int *out_type)
{
        struct octeon_ciu3_info *ciu3_info = d->host_data;
        unsigned int hwirq, type, intsn_major;
        union cvmx_ciu3_iscx_ctl isc;

        if (intsize < 2)
                return -EINVAL;
        hwirq = intspec[0];
        type = intspec[1];

        if (hwirq >= (1 << 20))
                return -EINVAL;

        intsn_major = hwirq >> 12;
        switch (intsn_major) {
        case 0x04: /* Software handled separately. */
                return -EINVAL;
        default:
                break;
        }

        isc.u64 =  cvmx_read_csr(ciu3_info->ciu3_addr + CIU3_ISC_CTL(hwirq));
        if (!isc.s.imp)
                return -EINVAL;

        switch (type) {
        case 4: /* official value for level triggering. */
                *out_type = IRQ_TYPE_LEVEL_HIGH;
                break;
        case 0: /* unofficial value, but we might as well let it work. */
        case 1: /* official value for edge triggering. */
                *out_type = IRQ_TYPE_EDGE_RISING;
                break;
        default: /* Nothing else is acceptable. */
                return -EINVAL;
        }

        *out_hwirq = hwirq;

        return 0;
}

void octeon_irq_ciu3_enable(struct irq_data *data)
{
        int cpu;
        union cvmx_ciu3_iscx_ctl isc_ctl;
        union cvmx_ciu3_iscx_w1c isc_w1c;
        u64 isc_ctl_addr;

        struct octeon_ciu_chip_data *cd;

        cpu = next_cpu_for_irq(data);

        cd = irq_data_get_irq_chip_data(data);

        isc_w1c.u64 = 0;
        isc_w1c.s.en = 1;
        cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64);

        isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn);
        isc_ctl.u64 = 0;
        isc_ctl.s.en = 1;
        isc_ctl.s.idt = per_cpu(octeon_irq_ciu3_idt_ip2, cpu);
        cvmx_write_csr(isc_ctl_addr, isc_ctl.u64);
        cvmx_read_csr(isc_ctl_addr);
}

void octeon_irq_ciu3_disable(struct irq_data *data)
{
        u64 isc_ctl_addr;
        union cvmx_ciu3_iscx_w1c isc_w1c;

        struct octeon_ciu_chip_data *cd;

        cd = irq_data_get_irq_chip_data(data);

        isc_w1c.u64 = 0;
        isc_w1c.s.en = 1;

        isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn);
        cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64);
        cvmx_write_csr(isc_ctl_addr, 0);
        cvmx_read_csr(isc_ctl_addr);
}

void octeon_irq_ciu3_ack(struct irq_data *data)
{
        u64 isc_w1c_addr;
        union cvmx_ciu3_iscx_w1c isc_w1c;
        struct octeon_ciu_chip_data *cd;
        u32 trigger_type = irqd_get_trigger_type(data);

        /*
         * We use a single irq_chip, so we have to do nothing to ack a
         * level interrupt.
         */
        if (!(trigger_type & IRQ_TYPE_EDGE_BOTH))
                return;

        cd = irq_data_get_irq_chip_data(data);

        isc_w1c.u64 = 0;
        isc_w1c.s.raw = 1;

        isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn);
        cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
        cvmx_read_csr(isc_w1c_addr);
}

void octeon_irq_ciu3_mask(struct irq_data *data)
{
        union cvmx_ciu3_iscx_w1c isc_w1c;
        u64 isc_w1c_addr;
        struct octeon_ciu_chip_data *cd;

        cd = irq_data_get_irq_chip_data(data);

        isc_w1c.u64 = 0;
        isc_w1c.s.en = 1;

        isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn);
        cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
        cvmx_read_csr(isc_w1c_addr);
}

void octeon_irq_ciu3_mask_ack(struct irq_data *data)
{
        union cvmx_ciu3_iscx_w1c isc_w1c;
        u64 isc_w1c_addr;
        struct octeon_ciu_chip_data *cd;
        u32 trigger_type = irqd_get_trigger_type(data);

        cd = irq_data_get_irq_chip_data(data);

        isc_w1c.u64 = 0;
        isc_w1c.s.en = 1;

        /*
         * We use a single irq_chip, so only ack an edge (!level)
         * interrupt.
         */
        if (trigger_type & IRQ_TYPE_EDGE_BOTH)
                isc_w1c.s.raw = 1;

        isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn);
        cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
        cvmx_read_csr(isc_w1c_addr);
}

#ifdef CONFIG_SMP
static int octeon_irq_ciu3_set_affinity(struct irq_data *data,
                                        const struct cpumask *dest, bool force)
{
        union cvmx_ciu3_iscx_ctl isc_ctl;
        union cvmx_ciu3_iscx_w1c isc_w1c;
        u64 isc_ctl_addr;
        int cpu;
        bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data);
        struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data);

        if (!cpumask_subset(dest, cpumask_of_node(cd->ciu_node)))
                return -EINVAL;

        if (!enable_one)
                return IRQ_SET_MASK_OK;

        cd = irq_data_get_irq_chip_data(data);
        cpu = cpumask_first(dest);
        if (cpu >= nr_cpu_ids)
                cpu = smp_processor_id();
        cd->current_cpu = cpu;

        isc_w1c.u64 = 0;
        isc_w1c.s.en = 1;
        cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64);

        isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn);
        isc_ctl.u64 = 0;
        isc_ctl.s.en = 1;
        isc_ctl.s.idt = per_cpu(octeon_irq_ciu3_idt_ip2, cpu);
        cvmx_write_csr(isc_ctl_addr, isc_ctl.u64);
        cvmx_read_csr(isc_ctl_addr);

        return IRQ_SET_MASK_OK;
}
#endif

static struct irq_chip octeon_irq_chip_ciu3 = {
        .name = "CIU3",
        .irq_startup = edge_startup,
        .irq_enable = octeon_irq_ciu3_enable,
        .irq_disable = octeon_irq_ciu3_disable,
        .irq_ack = octeon_irq_ciu3_ack,
        .irq_mask = octeon_irq_ciu3_mask,
        .irq_mask_ack = octeon_irq_ciu3_mask_ack,
        .irq_unmask = octeon_irq_ciu3_enable,
        .irq_set_type = octeon_irq_ciu_set_type,
#ifdef CONFIG_SMP
        .irq_set_affinity = octeon_irq_ciu3_set_affinity,
        .irq_cpu_offline = octeon_irq_cpu_offline_ciu,
#endif
};

int octeon_irq_ciu3_mapx(struct irq_domain *d, unsigned int virq,
                         irq_hw_number_t hw, struct irq_chip *chip)
{
        struct octeon_ciu3_info *ciu3_info = d->host_data;
        struct octeon_ciu_chip_data *cd = kzalloc_node(sizeof(*cd), GFP_KERNEL,
                                                       ciu3_info->node);
        if (!cd)
                return -ENOMEM;
        cd->intsn = hw;
        cd->current_cpu = -1;
        cd->ciu3_addr = ciu3_info->ciu3_addr;
        cd->ciu_node = ciu3_info->node;
        irq_set_chip_and_handler(virq, chip, handle_edge_irq);
        irq_set_chip_data(virq, cd);

        return 0;
}

static int octeon_irq_ciu3_map(struct irq_domain *d,
                               unsigned int virq, irq_hw_number_t hw)
{
        return octeon_irq_ciu3_mapx(d, virq, hw, &octeon_irq_chip_ciu3);
}

static struct irq_domain_ops octeon_dflt_domain_ciu3_ops = {
        .map = octeon_irq_ciu3_map,
        .unmap = octeon_irq_free_cd,
        .xlate = octeon_irq_ciu3_xlat,
};

static void octeon_irq_ciu3_ip2(void)
{
        union cvmx_ciu3_destx_pp_int dest_pp_int;
        struct octeon_ciu3_info *ciu3_info;
        u64 ciu3_addr;

        ciu3_info = __this_cpu_read(octeon_ciu3_info);
        ciu3_addr = ciu3_info->ciu3_addr;

        dest_pp_int.u64 = cvmx_read_csr(ciu3_addr + CIU3_DEST_PP_INT(3 * cvmx_get_local_core_num()));

        if (likely(dest_pp_int.s.intr)) {
                irq_hw_number_t intsn = dest_pp_int.s.intsn;
                irq_hw_number_t hw;
                struct irq_domain *domain;
                /* Get the domain to use from the major block */
                int block = intsn >> 12;
                int ret;

                domain = ciu3_info->domain[block];
                if (ciu3_info->intsn2hw[block])
                        hw = ciu3_info->intsn2hw[block](domain, intsn);
                else
                        hw = intsn;

                ret = handle_domain_irq(domain, hw, NULL);
                if (ret < 0) {
                        union cvmx_ciu3_iscx_w1c isc_w1c;
                        u64 isc_w1c_addr = ciu3_addr + CIU3_ISC_W1C(intsn);

                        isc_w1c.u64 = 0;
                        isc_w1c.s.en = 1;
                        cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
                        cvmx_read_csr(isc_w1c_addr);
                        spurious_interrupt();
                }
        } else {
                spurious_interrupt();
        }
}

/*
 * 10 mbox per core starting from zero.
 * Base mbox is core * 10
 */
static unsigned int octeon_irq_ciu3_base_mbox_intsn(int core)
{
        /* SW (mbox) are 0x04 in bits 12..19 */
        return 0x04000 + CIU3_MBOX_PER_CORE * core;
}

static unsigned int octeon_irq_ciu3_mbox_intsn_for_core(int core, unsigned int mbox)
{
        return octeon_irq_ciu3_base_mbox_intsn(core) + mbox;
}

static unsigned int octeon_irq_ciu3_mbox_intsn_for_cpu(int cpu, unsigned int mbox)
{
        int local_core = octeon_coreid_for_cpu(cpu) & 0x3f;

        return octeon_irq_ciu3_mbox_intsn_for_core(local_core, mbox);
}

static void octeon_irq_ciu3_mbox(void)
{
        union cvmx_ciu3_destx_pp_int dest_pp_int;
        struct octeon_ciu3_info *ciu3_info;
        u64 ciu3_addr;
        int core = cvmx_get_local_core_num();

        ciu3_info = __this_cpu_read(octeon_ciu3_info);
        ciu3_addr = ciu3_info->ciu3_addr;

        dest_pp_int.u64 = cvmx_read_csr(ciu3_addr + CIU3_DEST_PP_INT(1 + 3 * core));

        if (likely(dest_pp_int.s.intr)) {
                irq_hw_number_t intsn = dest_pp_int.s.intsn;
                int mbox = intsn - octeon_irq_ciu3_base_mbox_intsn(core);

                if (likely(mbox >= 0 && mbox < CIU3_MBOX_PER_CORE)) {
                        do_IRQ(mbox + OCTEON_IRQ_MBOX0);
                } else {
                        union cvmx_ciu3_iscx_w1c isc_w1c;
                        u64 isc_w1c_addr = ciu3_addr + CIU3_ISC_W1C(intsn);

                        isc_w1c.u64 = 0;
                        isc_w1c.s.en = 1;
                        cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
                        cvmx_read_csr(isc_w1c_addr);
                        spurious_interrupt();
                }
        } else {
                spurious_interrupt();
        }
}

void octeon_ciu3_mbox_send(int cpu, unsigned int mbox)
{
        struct octeon_ciu3_info *ciu3_info;
        unsigned int intsn;
        union cvmx_ciu3_iscx_w1s isc_w1s;
        u64 isc_w1s_addr;

        if (WARN_ON_ONCE(mbox >= CIU3_MBOX_PER_CORE))
                return;

        intsn = octeon_irq_ciu3_mbox_intsn_for_cpu(cpu, mbox);
        ciu3_info = per_cpu(octeon_ciu3_info, cpu);
        isc_w1s_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1S(intsn);

        isc_w1s.u64 = 0;
        isc_w1s.s.raw = 1;

        cvmx_write_csr(isc_w1s_addr, isc_w1s.u64);
        cvmx_read_csr(isc_w1s_addr);
}

static void octeon_irq_ciu3_mbox_set_enable(struct irq_data *data, int cpu, bool en)
{
        struct octeon_ciu3_info *ciu3_info;
        unsigned int intsn;
        u64 isc_ctl_addr, isc_w1c_addr;
        union cvmx_ciu3_iscx_ctl isc_ctl;
        unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;

        intsn = octeon_irq_ciu3_mbox_intsn_for_cpu(cpu, mbox);
        ciu3_info = per_cpu(octeon_ciu3_info, cpu);
        isc_w1c_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1C(intsn);
        isc_ctl_addr = ciu3_info->ciu3_addr + CIU3_ISC_CTL(intsn);

        isc_ctl.u64 = 0;
        isc_ctl.s.en = 1;

        cvmx_write_csr(isc_w1c_addr, isc_ctl.u64);
        cvmx_write_csr(isc_ctl_addr, 0);
        if (en) {
                unsigned int idt = per_cpu(octeon_irq_ciu3_idt_ip3, cpu);

                isc_ctl.u64 = 0;
                isc_ctl.s.en = 1;
                isc_ctl.s.idt = idt;
                cvmx_write_csr(isc_ctl_addr, isc_ctl.u64);
        }
        cvmx_read_csr(isc_ctl_addr);
}

static void octeon_irq_ciu3_mbox_enable(struct irq_data *data)
{
        int cpu;
        unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;

        WARN_ON(mbox >= CIU3_MBOX_PER_CORE);

        for_each_online_cpu(cpu)
                octeon_irq_ciu3_mbox_set_enable(data, cpu, true);
}

static void octeon_irq_ciu3_mbox_disable(struct irq_data *data)
{
        int cpu;
        unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;

        WARN_ON(mbox >= CIU3_MBOX_PER_CORE);

        for_each_online_cpu(cpu)
                octeon_irq_ciu3_mbox_set_enable(data, cpu, false);
}

static void octeon_irq_ciu3_mbox_ack(struct irq_data *data)
{
        struct octeon_ciu3_info *ciu3_info;
        unsigned int intsn;
        u64 isc_w1c_addr;
        union cvmx_ciu3_iscx_w1c isc_w1c;
        unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0;

        intsn = octeon_irq_ciu3_mbox_intsn_for_core(cvmx_get_local_core_num(), mbox);

        isc_w1c.u64 = 0;
        isc_w1c.s.raw = 1;

        ciu3_info = __this_cpu_read(octeon_ciu3_info);
        isc_w1c_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1C(intsn);
        cvmx_write_csr(isc_w1c_addr, isc_w1c.u64);
        cvmx_read_csr(isc_w1c_addr);
}

static void octeon_irq_ciu3_mbox_cpu_online(struct irq_data *data)
{
        octeon_irq_ciu3_mbox_set_enable(data, smp_processor_id(), true);
}

static void octeon_irq_ciu3_mbox_cpu_offline(struct irq_data *data)
{
        octeon_irq_ciu3_mbox_set_enable(data, smp_processor_id(), false);
}

static int octeon_irq_ciu3_alloc_resources(struct octeon_ciu3_info *ciu3_info)
{
        u64 b = ciu3_info->ciu3_addr;
        int idt_ip2, idt_ip3, idt_ip4;
        int unused_idt2;
        int core = cvmx_get_local_core_num();
        int i;

        __this_cpu_write(octeon_ciu3_info, ciu3_info);

        /*
         * 4 idt per core starting from 1 because zero is reserved.
         * Base idt per core is 4 * core + 1
         */
        idt_ip2 = core * 4 + 1;
        idt_ip3 = core * 4 + 2;
        idt_ip4 = core * 4 + 3;
        unused_idt2 = core * 4 + 4;
        __this_cpu_write(octeon_irq_ciu3_idt_ip2, idt_ip2);
        __this_cpu_write(octeon_irq_ciu3_idt_ip3, idt_ip3);

        /* ip2 interrupts for this CPU */
        cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip2), 0);
        cvmx_write_csr(b + CIU3_IDT_PP(idt_ip2, 0), 1ull << core);
        cvmx_write_csr(b + CIU3_IDT_IO(idt_ip2), 0);

        /* ip3 interrupts for this CPU */
        cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip3), 1);
        cvmx_write_csr(b + CIU3_IDT_PP(idt_ip3, 0), 1ull << core);
        cvmx_write_csr(b + CIU3_IDT_IO(idt_ip3), 0);

        /* ip4 interrupts for this CPU */
        cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip4), 2);
        cvmx_write_csr(b + CIU3_IDT_PP(idt_ip4, 0), 0);
        cvmx_write_csr(b + CIU3_IDT_IO(idt_ip4), 0);

        cvmx_write_csr(b + CIU3_IDT_CTL(unused_idt2), 0);
        cvmx_write_csr(b + CIU3_IDT_PP(unused_idt2, 0), 0);
        cvmx_write_csr(b + CIU3_IDT_IO(unused_idt2), 0);

        for (i = 0; i < CIU3_MBOX_PER_CORE; i++) {
                unsigned int intsn = octeon_irq_ciu3_mbox_intsn_for_core(core, i);

                cvmx_write_csr(b + CIU3_ISC_W1C(intsn), 2);
                cvmx_write_csr(b + CIU3_ISC_CTL(intsn), 0);
        }

        return 0;
}

static void octeon_irq_setup_secondary_ciu3(void)
{
        struct octeon_ciu3_info *ciu3_info;

        ciu3_info = octeon_ciu3_info_per_node[cvmx_get_node_num()];
        octeon_irq_ciu3_alloc_resources(ciu3_info);
        irq_cpu_online();

        /* 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 struct irq_chip octeon_irq_chip_ciu3_mbox = {
        .name = "CIU3-M",
        .irq_enable = octeon_irq_ciu3_mbox_enable,
        .irq_disable = octeon_irq_ciu3_mbox_disable,
        .irq_ack = octeon_irq_ciu3_mbox_ack,

        .irq_cpu_online = octeon_irq_ciu3_mbox_cpu_online,
        .irq_cpu_offline = octeon_irq_ciu3_mbox_cpu_offline,
        .flags = IRQCHIP_ONOFFLINE_ENABLED,
};

static int __init octeon_irq_init_ciu3(struct device_node *ciu_node,
                                       struct device_node *parent)
{
        int i;
        int node;
        struct irq_domain *domain;
        struct octeon_ciu3_info *ciu3_info;
        const __be32 *zero_addr;
        u64 base_addr;
        union cvmx_ciu3_const consts;

        node = 0; /* of_node_to_nid(ciu_node); */
        ciu3_info = kzalloc_node(sizeof(*ciu3_info), GFP_KERNEL, node);

        if (!ciu3_info)
                return -ENOMEM;

        zero_addr = of_get_address(ciu_node, 0, NULL, NULL);
        if (WARN_ON(!zero_addr))
                return -EINVAL;

        base_addr = of_translate_address(ciu_node, zero_addr);
        base_addr = (u64)phys_to_virt(base_addr);

        ciu3_info->ciu3_addr = base_addr;
        ciu3_info->node = node;

        consts.u64 = cvmx_read_csr(base_addr + CIU3_CONST);

        octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu3;

        octeon_irq_ip2 = octeon_irq_ciu3_ip2;
        octeon_irq_ip3 = octeon_irq_ciu3_mbox;
        octeon_irq_ip4 = octeon_irq_ip4_mask;

        if (node == cvmx_get_node_num()) {
                /* Mips internal */
                octeon_irq_init_core();

                /* Only do per CPU things if it is the CIU of the boot node. */
                i = irq_alloc_descs_from(OCTEON_IRQ_MBOX0, 8, node);
                WARN_ON(i < 0);

                for (i = 0; i < 8; i++)
                        irq_set_chip_and_handler(i + OCTEON_IRQ_MBOX0,
                                                 &octeon_irq_chip_ciu3_mbox, handle_percpu_irq);
        }

        /*
         * Initialize all domains to use the default domain. Specific major
         * blocks will overwrite the default domain as needed.
         */
        domain = irq_domain_add_tree(ciu_node, &octeon_dflt_domain_ciu3_ops,
                                     ciu3_info);
        for (i = 0; i < MAX_CIU3_DOMAINS; i++)
                ciu3_info->domain[i] = domain;

        octeon_ciu3_info_per_node[node] = ciu3_info;

        if (node == cvmx_get_node_num()) {
                /* Only do per CPU things if it is the CIU of the boot node. */
                octeon_irq_ciu3_alloc_resources(ciu3_info);
                if (node == 0)
                        irq_set_default_host(domain);

                octeon_irq_use_ip4 = false;
                /* Enable the CIU lines */
                set_c0_status(STATUSF_IP2 | STATUSF_IP3);
                clear_c0_status(STATUSF_IP4);
        }

        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-7890-ciu3", .data = octeon_irq_init_ciu3},
        {.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 */

struct irq_domain *octeon_irq_get_block_domain(int node, uint8_t block)
{
        struct octeon_ciu3_info *ciu3_info;

        ciu3_info = octeon_ciu3_info_per_node[node & CVMX_NODE_MASK];
        return ciu3_info->domain[block];
}
EXPORT_SYMBOL(octeon_irq_get_block_domain);