diff options
Diffstat (limited to 'arch/mips/cavium-octeon/octeon-irq.c')
| -rw-r--r-- | arch/mips/cavium-octeon/octeon-irq.c | 1788 |
1 files changed, 1788 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c new file mode 100644 index 00000000000..1b82ac6921e --- /dev/null +++ b/arch/mips/cavium-octeon/octeon-irq.c @@ -0,0 +1,1788 @@ +/* + * 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) 2004-2012 Cavium, Inc. + */ + +#include <linux/interrupt.h> +#include <linux/irqdomain.h> +#include <linux/bitops.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> + +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 __read_mostly u8 octeon_irq_ciu_to_irq[8][64]; + +union octeon_ciu_chip_data { + void *p; + unsigned long l; + struct { + unsigned long line:6; + unsigned long bit:6; + unsigned long gpio_line:6; + } s; +}; + +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 void octeon_irq_set_ciu_mapping(int irq, int line, int bit, int gpio_line, + struct irq_chip *chip, + irq_flow_handler_t handler) +{ + union octeon_ciu_chip_data cd; + + irq_set_chip_and_handler(irq, chip, handler); + + cd.l = 0; + cd.s.line = line; + cd.s.bit = bit; + cd.s.gpio_line = gpio_line; + + irq_set_chip_data(irq, cd.p); + octeon_irq_ciu_to_irq[line][bit] = irq; +} + +static void octeon_irq_force_ciu_mapping(struct irq_domain *domain, + int irq, int line, int bit) +{ + 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; + int weight = cpumask_weight(data->affinity); + + if (weight > 1) { + cpu = smp_processor_id(); + for (;;) { + cpu = cpumask_next(cpu, data->affinity); + 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(data->affinity); + } else { + cpu = smp_processor_id(); + } + 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; + union octeon_ciu_chip_data cd; + raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu); + + cd.p = irq_data_get_irq_chip_data(data); + + raw_spin_lock_irqsave(lock, flags); + if (cd.s.line == 0) { + pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu); + __set_bit(cd.s.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.s.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; + union octeon_ciu_chip_data cd; + raw_spinlock_t *lock = &__get_cpu_var(octeon_irq_ciu_spinlock); + + cd.p = irq_data_get_irq_chip_data(data); + + raw_spin_lock_irqsave(lock, flags); + if (cd.s.line == 0) { + pen = &__get_cpu_var(octeon_irq_ciu0_en_mirror); + __set_bit(cd.s.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 = &__get_cpu_var(octeon_irq_ciu1_en_mirror); + __set_bit(cd.s.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; + union octeon_ciu_chip_data cd; + raw_spinlock_t *lock = &__get_cpu_var(octeon_irq_ciu_spinlock); + + cd.p = irq_data_get_irq_chip_data(data); + + raw_spin_lock_irqsave(lock, flags); + if (cd.s.line == 0) { + pen = &__get_cpu_var(octeon_irq_ciu0_en_mirror); + __clear_bit(cd.s.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 = &__get_cpu_var(octeon_irq_ciu1_en_mirror); + __clear_bit(cd.s.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; + union octeon_ciu_chip_data cd; + raw_spinlock_t *lock; + + cd.p = 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.s.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.s.bit, pen); + /* + * Must be visible to octeon_irq_ip{2,3}_ciu() before + * enabling the irq. + */ + wmb(); + if (cd.s.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; + union octeon_ciu_chip_data cd; + raw_spinlock_t *lock; + + cd.p = 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.s.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.s.bit, pen); + /* + * Must be visible to octeon_irq_ip{2,3}_ciu() before + * enabling the irq. + */ + wmb(); + if (cd.s.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); + union octeon_ciu_chip_data cd; + + cd.p = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd.s.bit); + + /* + * Called under the desc lock, so these should never get out + * of sync. + */ + if (cd.s.line == 0) { + int index = octeon_coreid_for_cpu(cpu) * 2; + set_bit(cd.s.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.s.bit, &per_cpu(octeon_irq_ciu1_en_mirror, cpu)); + cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), 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; + union octeon_ciu_chip_data cd; + + cd.p = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd.s.bit); + + if (cd.s.line == 0) { + int index = cvmx_get_core_num() * 2; + set_bit(cd.s.bit, &__get_cpu_var(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.s.bit, &__get_cpu_var(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; + union octeon_ciu_chip_data cd; + + cd.p = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd.s.bit); + + if (cd.s.line == 0) { + int index = cvmx_get_core_num() * 2; + clear_bit(cd.s.bit, &__get_cpu_var(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.s.bit, &__get_cpu_var(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; + union octeon_ciu_chip_data cd; + + cd.p = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd.s.bit); + + if (cd.s.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; + union octeon_ciu_chip_data cd; + + cd.p = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd.s.bit); + + if (cd.s.line == 0) { + for_each_online_cpu(cpu) { + int index = octeon_coreid_for_cpu(cpu) * 2; + clear_bit(cd.s.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.s.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; + union octeon_ciu_chip_data cd; + + cd.p = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd.s.bit); + + if (cd.s.line == 0) { + for_each_online_cpu(cpu) { + int index = octeon_coreid_for_cpu(cpu) * 2; + set_bit(cd.s.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.s.bit, &per_cpu(octeon_irq_ciu1_en_mirror, cpu)); + cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask); + } + } +} + +static void octeon_irq_gpio_setup(struct irq_data *data) +{ + union cvmx_gpio_bit_cfgx cfg; + union octeon_ciu_chip_data cd; + u32 t = irqd_get_trigger_type(data); + + cd.p = 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.s.gpio_line), cfg.u64); +} + +static void octeon_irq_ciu_enable_gpio_v2(struct irq_data *data) +{ + octeon_irq_gpio_setup(data); + octeon_irq_ciu_enable_v2(data); +} + +static void octeon_irq_ciu_enable_gpio(struct irq_data *data) +{ + octeon_irq_gpio_setup(data); + octeon_irq_ciu_enable(data); +} + +static int octeon_irq_ciu_gpio_set_type(struct irq_data *data, unsigned int t) +{ + irqd_set_trigger_type(data, t); + octeon_irq_gpio_setup(data); + + return IRQ_SET_MASK_OK; +} + +static void octeon_irq_ciu_disable_gpio_v2(struct irq_data *data) +{ + union octeon_ciu_chip_data cd; + + cd.p = irq_data_get_irq_chip_data(data); + cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd.s.gpio_line), 0); + + octeon_irq_ciu_disable_all_v2(data); +} + +static void octeon_irq_ciu_disable_gpio(struct irq_data *data) +{ + union octeon_ciu_chip_data cd; + + cd.p = irq_data_get_irq_chip_data(data); + cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd.s.gpio_line), 0); + + octeon_irq_ciu_disable_all(data); +} + +static void octeon_irq_ciu_gpio_ack(struct irq_data *data) +{ + union octeon_ciu_chip_data cd; + u64 mask; + + cd.p = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd.s.gpio_line); + + cvmx_write_csr(CVMX_GPIO_INT_CLR, mask); +} + +static void octeon_irq_handle_gpio(unsigned int irq, struct irq_desc *desc) +{ + if (irq_get_trigger_type(irq) & IRQ_TYPE_EDGE_BOTH) + handle_edge_irq(irq, desc); + else + handle_level_irq(irq, desc); +} + +#ifdef CONFIG_SMP + +static void octeon_irq_cpu_offline_ciu(struct irq_data *data) +{ + int cpu = smp_processor_id(); + cpumask_t new_affinity; + + if (!cpumask_test_cpu(cpu, data->affinity)) + return; + + if (cpumask_weight(data->affinity) > 1) { + /* + * It has multi CPU affinity, just remove this CPU + * from the affinity set. + */ + cpumask_copy(&new_affinity, data->affinity); + cpumask_clear_cpu(cpu, &new_affinity); + } else { + /* Otherwise, put it on lowest numbered online CPU. */ + cpumask_clear(&new_affinity); + cpumask_set_cpu(cpumask_first(cpu_online_mask), &new_affinity); + } + irq_set_affinity_locked(data, &new_affinity, false); +} + +static int octeon_irq_ciu_set_affinity(struct irq_data *data, + const struct cpumask *dest, bool force) +{ + int cpu; + bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data); + unsigned long flags; + union octeon_ciu_chip_data cd; + unsigned long *pen; + raw_spinlock_t *lock; + + cd.p = 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.s.line == 0) + pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu); + else + pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu); + + if (cpumask_test_cpu(cpu, dest) && enable_one) { + enable_one = 0; + __set_bit(cd.s.bit, pen); + } else { + __clear_bit(cd.s.bit, pen); + } + /* + * Must be visible to octeon_irq_ip{2,3}_ciu() before + * enabling the irq. + */ + wmb(); + + if (cd.s.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; + union octeon_ciu_chip_data cd; + + if (!enable_one) + return 0; + + cd.p = irq_data_get_irq_chip_data(data); + mask = 1ull << cd.s.bit; + + if (cd.s.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.s.bit, pen); + cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask); + } else { + clear_bit(cd.s.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.s.bit, pen); + cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask); + } else { + clear_bit(cd.s.bit, pen); + cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask); + } + } + } + return 0; +} +#endif + +/* + * Newer octeon chips have support for lockless CIU operation. + */ +static struct irq_chip octeon_irq_chip_ciu_v2 = { + .name = "CIU", + .irq_enable = octeon_irq_ciu_enable_v2, + .irq_disable = octeon_irq_ciu_disable_all_v2, + .irq_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 +}; + +static struct irq_chip octeon_irq_chip_ciu = { + .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, +#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, +#endif + .flags = IRQCHIP_SET_TYPE_MASKED, +}; + +/* + * Watchdog interrupts are special. They are associated with a single + * core, so we hardwire the affinity to that core. + */ +static void octeon_irq_ciu_wd_enable(struct irq_data *data) +{ + unsigned long flags; + unsigned long *pen; + int coreid = data->irq - OCTEON_IRQ_WDOG0; /* Bit 0-63 of EN1 */ + int cpu = octeon_cpu_for_coreid(coreid); + raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu); + + raw_spin_lock_irqsave(lock, flags); + pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu); + __set_bit(coreid, pen); + /* + * Must be visible to octeon_irq_ip{2,3}_ciu() before enabling + * the irq. + */ + wmb(); + cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen); + raw_spin_unlock_irqrestore(lock, flags); +} + +/* + * Watchdog interrupts are special. They are associated with a single + * core, so we hardwire the affinity to that core. + */ +static void octeon_irq_ciu1_wd_enable_v2(struct irq_data *data) +{ + int coreid = data->irq - OCTEON_IRQ_WDOG0; + int cpu = octeon_cpu_for_coreid(coreid); + + set_bit(coreid, &per_cpu(octeon_irq_ciu1_en_mirror, cpu)); + cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(coreid * 2 + 1), 1ull << coreid); +} + + +static struct irq_chip octeon_irq_chip_ciu_wd_v2 = { + .name = "CIU-W", + .irq_enable = octeon_irq_ciu1_wd_enable_v2, + .irq_disable = octeon_irq_ciu_disable_all_v2, + .irq_mask = octeon_irq_ciu_disable_local_v2, + .irq_unmask = octeon_irq_ciu_enable_local_v2, +}; + +static struct irq_chip octeon_irq_chip_ciu_wd = { + .name = "CIU-W", + .irq_enable = octeon_irq_ciu_wd_enable, + .irq_disable = octeon_irq_ciu_disable_all, + .irq_mask = octeon_irq_ciu_disable_local, + .irq_unmask = octeon_irq_ciu_enable_local, +}; + +static bool octeon_irq_ciu_is_edge(unsigned int line, unsigned int bit) +{ + bool edge = false; + + if (line == 0) + switch (bit) { + case 48 ... 49: /* GMX DRP */ + case 50: /* IPD_DRP */ + case 52 ... 55: /* Timers */ + case 58: /* MPI */ + edge = true; + break; + default: + break; + } + else /* line == 1 */ + switch (bit) { + case 47: /* PTP */ + edge = true; + break; + default: + break; + } + return edge; +} + +struct octeon_irq_gpio_domain_data { + unsigned int base_hwirq; +}; + +static int octeon_irq_gpio_xlat(struct irq_domain *d, + struct device_node *node, + const u32 *intspec, + unsigned int intsize, + unsigned long *out_hwirq, + unsigned int *out_type) +{ + unsigned int type; + unsigned int pin; + unsigned int trigger; + + if (d->of_node != node) + return -EINVAL; + + if (intsize < 2) + return -EINVAL; + + pin = intspec[0]; + if (pin >= 16) + return -EINVAL; + + trigger = intspec[1]; + + switch (trigger) { + case 1: + type = IRQ_TYPE_EDGE_RISING; + break; + case 2: + type = IRQ_TYPE_EDGE_FALLING; + break; + case 4: + type = IRQ_TYPE_LEVEL_HIGH; + break; + case 8: + type = IRQ_TYPE_LEVEL_LOW; + break; + default: + pr_err("Error: (%s) Invalid irq trigger specification: %x\n", + node->name, + trigger); + type = IRQ_TYPE_LEVEL_LOW; + break; + } + *out_type = type; + *out_hwirq = pin; + + return 0; +} + +static int octeon_irq_ciu_xlat(struct irq_domain *d, + struct device_node *node, + const u32 *intspec, + unsigned int intsize, + unsigned long *out_hwirq, + unsigned int *out_type) +{ + unsigned int ciu, bit; + + ciu = intspec[0]; + bit = intspec[1]; + + if (ciu > 1 || 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_gpio_chip; + +static bool octeon_irq_virq_in_range(unsigned int virq) +{ + /* We cannot let it overflow the mapping array. */ + if (virq < (1ul << 8 * sizeof(octeon_irq_ciu_to_irq[0][0]))) + return true; + + WARN_ONCE(true, "virq out of range %u.\n", virq); + return false; +} + +static int octeon_irq_ciu_map(struct irq_domain *d, + unsigned int virq, irq_hw_number_t hw) +{ + unsigned int line = hw >> 6; + unsigned int bit = hw & 63; + + if (!octeon_irq_virq_in_range(virq)) + return -EINVAL; + + /* Don't map irq if it is reserved for GPIO. */ + if (line == 0 && bit >= 16 && bit <32) + return 0; + + if (line > 1 || octeon_irq_ciu_to_irq[line][bit] != 0) + return -EINVAL; + + if (octeon_irq_ciu_is_edge(line, bit)) + octeon_irq_set_ciu_mapping(virq, line, bit, 0, + octeon_irq_ciu_chip, + handle_edge_irq); + else + octeon_irq_set_ciu_mapping(virq, line, bit, 0, + octeon_irq_ciu_chip, + handle_level_irq); + + return 0; +} + +static int octeon_irq_gpio_map_common(struct irq_domain *d, + unsigned int virq, irq_hw_number_t hw, + int line_limit, struct irq_chip *chip) +{ + struct octeon_irq_gpio_domain_data *gpiod = d->host_data; + unsigned int line, bit; + + if (!octeon_irq_virq_in_range(virq)) + return -EINVAL; + + line = (hw + gpiod->base_hwirq) >> 6; + bit = (hw + gpiod->base_hwirq) & 63; + if (line > line_limit || octeon_irq_ciu_to_irq[line][bit] != 0) + return -EINVAL; + + octeon_irq_set_ciu_mapping(virq, line, bit, hw, + chip, octeon_irq_handle_gpio); + return 0; +} + +static int octeon_irq_gpio_map(struct irq_domain *d, + unsigned int virq, irq_hw_number_t hw) +{ + return octeon_irq_gpio_map_common(d, virq, hw, 1, octeon_irq_gpio_chip); +} + +static struct irq_domain_ops octeon_irq_domain_ciu_ops = { + .map = octeon_irq_ciu_map, + .xlate = octeon_irq_ciu_xlat, +}; + +static struct irq_domain_ops octeon_irq_domain_gpio_ops = { + .map = octeon_irq_gpio_map, + .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 &= __get_cpu_var(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 &= __get_cpu_var(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 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(); + + + __get_cpu_var(octeon_irq_ciu0_en_mirror) = 0; + __get_cpu_var(octeon_irq_ciu1_en_mirror) = 0; + wmb(); + raw_spin_lock_init(&__get_cpu_var(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); + 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 void __init octeon_irq_init_ciu(void) +{ + unsigned int i; + struct irq_chip *chip; + struct irq_chip *chip_mbox; + struct irq_chip *chip_wd; + struct device_node *gpio_node; + struct device_node *ciu_node; + struct irq_domain *ciu_domain = NULL; + + 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_MODEL(OCTEON_CN58XX_PASS2_X) || + OCTEON_IS_MODEL(OCTEON_CN56XX_PASS2_X) || + OCTEON_IS_MODEL(OCTEON_CN52XX_PASS2_X) || + OCTEON_IS_MODEL(OCTEON_CN6XXX)) { + chip = &octeon_irq_chip_ciu_v2; + 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_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_ip4 = octeon_irq_ip4_mask; + + /* Mips internal */ + octeon_irq_init_core(); + + gpio_node = of_find_compatible_node(NULL, NULL, "cavium,octeon-3860-gpio"); + if (gpio_node) { + struct octeon_irq_gpio_domain_data *gpiod; + + gpiod = kzalloc(sizeof(*gpiod), GFP_KERNEL); + if (gpiod) { + /* gpio domain host_data is the base hwirq number. */ + gpiod->base_hwirq = 16; + irq_domain_add_linear(gpio_node, 16, &octeon_irq_domain_gpio_ops, gpiod); + of_node_put(gpio_node); + } else + pr_warn("Cannot allocate memory for GPIO irq_domain.\n"); + } else + pr_warn("Cannot find device node for cavium,octeon-3860-gpio.\n"); + + ciu_node = of_find_compatible_node(NULL, NULL, "cavium,octeon-3860-ciu"); + if (ciu_node) { + ciu_domain = irq_domain_add_tree(ciu_node, &octeon_irq_domain_ciu_ops, NULL); + irq_set_default_host(ciu_domain); + of_node_put(ciu_node); + } else + panic("Cannot find device node for cavium,octeon-3860-ciu."); + + /* CIU_0 */ + for (i = 0; i < 16; i++) + octeon_irq_force_ciu_mapping(ciu_domain, i + OCTEON_IRQ_WORKQ0, 0, i + 0); + + octeon_irq_set_ciu_mapping(OCTEON_IRQ_MBOX0, 0, 32, 0, chip_mbox, handle_percpu_irq); + octeon_irq_set_ciu_mapping(OCTEON_IRQ_MBOX1, 0, 33, 0, chip_mbox, handle_percpu_irq); + + for (i = 0; i < 4; i++) + octeon_irq_force_ciu_mapping(ciu_domain, i + OCTEON_IRQ_PCI_INT0, 0, i + 36); + for (i = 0; i < 4; i++) + octeon_irq_force_ciu_mapping(ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 0, i + 40); + + octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI, 0, 45); + octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_RML, 0, 46); + for (i = 0; i < 4; i++) + octeon_irq_force_ciu_mapping(ciu_domain, i + OCTEON_IRQ_TIMER0, 0, i + 52); + + octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB0, 0, 56); + octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI2, 0, 59); + + /* CIU_1 */ + for (i = 0; i < 16; i++) + octeon_irq_set_ciu_mapping(i + OCTEON_IRQ_WDOG0, 1, i + 0, 0, chip_wd, handle_level_irq); + + octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB1, 1, 17); + + /* Enable the CIU lines */ + set_c0_status(STATUSF_IP3 | STATUSF_IP2); + clear_c0_status(STATUSF_IP4); +} + +/* + * 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; + union octeon_ciu_chip_data cd; + + cd.p = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd.s.bit); + + en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) + (0x1000ull * cd.s.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); + union octeon_ciu_chip_data cd; + + cd.p = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd.s.bit); + + en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) + (0x1000ull * cd.s.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(); + union octeon_ciu_chip_data cd; + + cd.p = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd.s.bit); + + en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) + (0x1000ull * cd.s.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(); + union octeon_ciu_chip_data cd; + + cd.p = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd.s.bit); + + en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(coreid) + (0x1000ull * cd.s.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(); + union octeon_ciu_chip_data cd; + + cd.p = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd.s.bit); + + en_addr = CVMX_CIU2_RAW_PPX_IP2_WRKQ(coreid) + (0x1000ull * cd.s.line); + cvmx_write_csr(en_addr, mask); + +} + +static void octeon_irq_ciu2_disable_all(struct irq_data *data) +{ + int cpu; + u64 mask; + union octeon_ciu_chip_data cd; + + cd.p = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd.s.bit); + + for_each_online_cpu(cpu) { + u64 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(octeon_coreid_for_cpu(cpu)) + (0x1000ull * cd.s.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; + union octeon_ciu_chip_data cd; + + if (!enable_one) + return 0; + + cd.p = irq_data_get_irq_chip_data(data); + mask = 1ull << cd.s.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.s.line); + } else { + en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(octeon_coreid_for_cpu(cpu)) + (0x1000ull * cd.s.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) +{ + union octeon_ciu_chip_data cd; + cd.p = irq_data_get_irq_chip_data(data); + + cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd.s.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_ack = octeon_irq_ciu2_ack, + .irq_mask = octeon_irq_ciu2_disable_local, + .irq_unmask = octeon_irq_ciu2_enable, +#ifdef CONFIG_SMP + .irq_set_affinity = octeon_irq_ciu2_set_affinity, + .irq_cpu_offline = octeon_irq_cpu_offline_ciu, +#endif +}; + +static struct irq_chip octeon_irq_chip_ciu2_mbox = { + .name = "CIU2-M", + .irq_enable = octeon_irq_ciu2_mbox_enable_all, + .irq_disable = octeon_irq_ciu2_mbox_disable_all, + .irq_ack = octeon_irq_ciu2_mbox_disable_local, + .irq_eoi = octeon_irq_ciu2_mbox_enable_local, + + .irq_cpu_online = octeon_irq_ciu2_mbox_enable_local, + .irq_cpu_offline = octeon_irq_ciu2_mbox_disable_local, + .flags = IRQCHIP_ONOFFLINE_ENABLED, +}; + +static struct irq_chip octeon_irq_chip_ciu2_wd = { + .name = "CIU2-W", + .irq_enable = octeon_irq_ciu2_wd_enable, + .irq_disable = octeon_irq_ciu2_disable_all, + .irq_mask = octeon_irq_ciu2_disable_local, + .irq_unmask = octeon_irq_ciu2_enable_local, +}; + +static struct irq_chip octeon_irq_chip_ciu2_gpio = { + .name = "CIU-GPIO", + .irq_enable = octeon_irq_ciu2_enable_gpio, + .irq_disable = octeon_irq_ciu2_disable_gpio, + .irq_ack = octeon_irq_ciu_gpio_ack, + .irq_mask = octeon_irq_ciu2_disable_local, + .irq_unmask = octeon_irq_ciu2_enable, + .irq_set_type = octeon_irq_ciu_gpio_set_type, +#ifdef CONFIG_SMP + .irq_set_affinity = octeon_irq_ciu2_set_affinity, + .irq_cpu_offline = octeon_irq_cpu_offline_ciu, +#endif + .flags = IRQCHIP_SET_TYPE_MASKED, +}; + +static int octeon_irq_ciu2_xlat(struct irq_domain *d, + struct device_node *node, + const u32 *intspec, + unsigned int intsize, + unsigned long *out_hwirq, + unsigned int *out_type) +{ + unsigned int ciu, bit; + + ciu = intspec[0]; + bit = intspec[1]; + + *out_hwirq = (ciu << 6) | bit; + *out_type = 0; + + return 0; +} + +static bool octeon_irq_ciu2_is_edge(unsigned int line, unsigned int bit) +{ + bool edge = false; + + if (line == 3) /* MIO */ + switch (bit) { + case 2: /* IPD_DRP */ + case 8 ... 11: /* Timers */ + case 48: /* PTP */ + edge = true; + break; + default: + break; + } + else if (line == 6) /* PKT */ + switch (bit) { + case 52 ... 53: /* ILK_DRP */ + case 8 ... 12: /* GMX_DRP */ + edge = true; + break; + default: + break; + } + return edge; +} + +static int octeon_irq_ciu2_map(struct irq_domain *d, + unsigned int virq, irq_hw_number_t hw) +{ + unsigned int line = hw >> 6; + unsigned int bit = hw & 63; + + if (!octeon_irq_virq_in_range(virq)) + return -EINVAL; + + /* + * Don't map irq if it is reserved for GPIO. + * (Line 7 are the GPIO lines.) + */ + if (line == 7) + return 0; + + if (line > 7 || octeon_irq_ciu_to_irq[line][bit] != 0) + return -EINVAL; + + if (octeon_irq_ciu2_is_edge(line, bit)) + octeon_irq_set_ciu_mapping(virq, line, bit, 0, + &octeon_irq_chip_ciu2, + handle_edge_irq); + else + octeon_irq_set_ciu_mapping(virq, line, bit, 0, + &octeon_irq_chip_ciu2, + handle_level_irq); + + return 0; +} +static int octeon_irq_ciu2_gpio_map(struct irq_domain *d, + unsigned int virq, irq_hw_number_t hw) +{ + return octeon_irq_gpio_map_common(d, virq, hw, 7, &octeon_irq_chip_ciu2_gpio); +} + +static struct irq_domain_ops octeon_irq_domain_ciu2_ops = { + .map = octeon_irq_ciu2_map, + .xlate = octeon_irq_ciu2_xlat, +}; + +static struct irq_domain_ops octeon_irq_domain_ciu2_gpio_ops = { + .map = octeon_irq_ciu2_gpio_map, + .xlate = octeon_irq_gpio_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 void __init octeon_irq_init_ciu2(void) +{ + unsigned int i; + struct device_node *gpio_node; + struct device_node *ciu_node; + struct irq_domain *ciu_domain = NULL; + + octeon_irq_init_ciu2_percpu(); + octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu2; + + 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(); + + gpio_node = of_find_compatible_node(NULL, NULL, "cavium,octeon-3860-gpio"); + if (gpio_node) { + struct octeon_irq_gpio_domain_data *gpiod; + + gpiod = kzalloc(sizeof(*gpiod), GFP_KERNEL); + if (gpiod) { + /* gpio domain host_data is the base hwirq number. */ + gpiod->base_hwirq = 7 << 6; + irq_domain_add_linear(gpio_node, 16, &octeon_irq_domain_ciu2_gpio_ops, gpiod); + of_node_put(gpio_node); + } else + pr_warn("Cannot allocate memory for GPIO irq_domain.\n"); + } else + pr_warn("Cannot find device node for cavium,octeon-3860-gpio.\n"); + + ciu_node = of_find_compatible_node(NULL, NULL, "cavium,octeon-6880-ciu2"); + if (ciu_node) { + ciu_domain = irq_domain_add_tree(ciu_node, &octeon_irq_domain_ciu2_ops, NULL); + irq_set_default_host(ciu_domain); + of_node_put(ciu_node); + } else + panic("Cannot find device node for cavium,octeon-6880-ciu2."); + + /* CUI2 */ + for (i = 0; i < 64; i++) + octeon_irq_force_ciu_mapping(ciu_domain, i + OCTEON_IRQ_WORKQ0, 0, i); + + for (i = 0; i < 32; i++) + octeon_irq_set_ciu_mapping(i + OCTEON_IRQ_WDOG0, 1, i, 0, + &octeon_irq_chip_ciu2_wd, handle_level_irq); + + for (i = 0; i < 4; i++) + octeon_irq_force_ciu_mapping(ciu_domain, i + OCTEON_IRQ_TIMER0, 3, i + 8); + + octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB0, 3, 44); + + for (i = 0; i < 4; i++) + octeon_irq_force_ciu_mapping(ciu_domain, i + OCTEON_IRQ_PCI_INT0, 4, i); + + for (i = 0; i < 4; i++) + octeon_irq_force_ciu_mapping(ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 4, i + 8); + + 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); +} + +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 + if (OCTEON_IS_MODEL(OCTEON_CN68XX)) + octeon_irq_init_ciu2(); + else + octeon_irq_init_ciu(); +} + +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 (unlikely(cop0_cause & STATUSF_IP2)) + octeon_irq_ip2(); + else if (unlikely(cop0_cause & STATUSF_IP3)) + octeon_irq_ip3(); + else if (unlikely(cop0_cause & STATUSF_IP4)) + octeon_irq_ip4(); + else if (likely(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 */ |