diff options
Diffstat (limited to 'arch/mips/cavium-octeon/octeon-irq.c')
| -rw-r--r-- | arch/mips/cavium-octeon/octeon-irq.c | 3007 |
1 files changed, 3007 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 000000000..fd8043f6f --- /dev/null +++ b/arch/mips/cavium-octeon/octeon-irq.c @@ -0,0 +1,3007 @@ +/* + * 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) +{ + struct device_node *of_node; + int ret; + + of_node = irq_domain_get_of_node(domain); + if (!of_node) + return -EINVAL; + ret = irq_alloc_desc_at(irq, of_node_to_nid(of_node)); + if (ret < 0) + return ret; + + 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; + const 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; + const 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 const 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 const 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 respectively. 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 const 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 const 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 const 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; + + irq_enter(); + ret = generic_handle_domain_irq(domain, hw); + irq_exit(); + + 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); |