| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| David Daney | 12586 | 98.06% | 21 | 47.73% |
| Thomas Gleixner | 63 | 0.49% | 4 | 9.09% |
| Steven J. Hill | 48 | 0.37% | 2 | 4.55% |
| Jiang Liu | 26 | 0.20% | 1 | 2.27% |
| Christoph Lameter | 22 | 0.17% | 1 | 2.27% |
| Alexander Sverdlin | 21 | 0.16% | 2 | 4.55% |
| Eunbong Song 송은봉 | 18 | 0.14% | 1 | 2.27% |
| Ralf Baechle | 13 | 0.10% | 3 | 6.82% |
| Andreas Herrmann | 11 | 0.09% | 1 | 2.27% |
| Colin Ian King | 9 | 0.07% | 1 | 2.27% |
| Marc Zyngier | 6 | 0.05% | 1 | 2.27% |
| Rob Herring | 5 | 0.04% | 1 | 2.27% |
| Yinghai Lu | 3 | 0.02% | 1 | 2.27% |
| Dan Carpenter | 1 | 0.01% | 1 | 2.27% |
| Nicholas Mc Guire | 1 | 0.01% | 1 | 2.27% |
| Joe Perches | 1 | 0.01% | 1 | 2.27% |
| Aaro Koskinen | 1 | 0.01% | 1 | 2.27% |
| Total | 12835 | 44 |
/* * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2004-2016 Cavium, Inc. */ #include <linux/of_address.h> #include <linux/interrupt.h> #include <linux/irqdomain.h> #include <linux/bitops.h> #include <linux/of_irq.h> #include <linux/percpu.h> #include <linux/slab.h> #include <linux/irq.h> #include <linux/smp.h> #include <linux/of.h> #include <asm/octeon/octeon.h> #include <asm/octeon/cvmx-ciu2-defs.h> #include <asm/octeon/cvmx-ciu3-defs.h> static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu0_en_mirror); static DEFINE_PER_CPU(unsigned long, octeon_irq_ciu1_en_mirror); static DEFINE_PER_CPU(raw_spinlock_t, octeon_irq_ciu_spinlock); static DEFINE_PER_CPU(unsigned int, octeon_irq_ciu3_idt_ip2); static DEFINE_PER_CPU(unsigned int, octeon_irq_ciu3_idt_ip3); static DEFINE_PER_CPU(struct octeon_ciu3_info *, octeon_ciu3_info); #define CIU3_MBOX_PER_CORE 10 /* * The 8 most significant bits of the intsn identify the interrupt major block. * Each major block might use its own interrupt domain. Thus 256 domains are * needed. */ #define MAX_CIU3_DOMAINS 256 typedef irq_hw_number_t (*octeon_ciu3_intsn2hw_t)(struct irq_domain *, unsigned int); /* Information for each ciu3 in the system */ struct octeon_ciu3_info { u64 ciu3_addr; int node; struct irq_domain *domain[MAX_CIU3_DOMAINS]; octeon_ciu3_intsn2hw_t intsn2hw[MAX_CIU3_DOMAINS]; }; /* Each ciu3 in the system uses its own data (one ciu3 per node) */ static struct octeon_ciu3_info *octeon_ciu3_info_per_node[4]; struct octeon_irq_ciu_domain_data { int num_sum; /* number of sum registers (2 or 3). */ }; /* Register offsets from ciu3_addr */ #define CIU3_CONST 0x220 #define CIU3_IDT_CTL(_idt) ((_idt) * 8 + 0x110000) #define CIU3_IDT_PP(_idt, _idx) ((_idt) * 32 + (_idx) * 8 + 0x120000) #define CIU3_IDT_IO(_idt) ((_idt) * 8 + 0x130000) #define CIU3_DEST_PP_INT(_pp_ip) ((_pp_ip) * 8 + 0x200000) #define CIU3_DEST_IO_INT(_io) ((_io) * 8 + 0x210000) #define CIU3_ISC_CTL(_intsn) ((_intsn) * 8 + 0x80000000) #define CIU3_ISC_W1C(_intsn) ((_intsn) * 8 + 0x90000000) #define CIU3_ISC_W1S(_intsn) ((_intsn) * 8 + 0xa0000000) static __read_mostly int octeon_irq_ciu_to_irq[8][64]; struct octeon_ciu_chip_data { union { struct { /* only used for ciu3 */ u64 ciu3_addr; unsigned int intsn; }; struct { /* only used for ciu/ciu2 */ u8 line; u8 bit; }; }; int gpio_line; int current_cpu; /* Next CPU expected to take this irq */ int ciu_node; /* NUMA node number of the CIU */ }; struct octeon_core_chip_data { struct mutex core_irq_mutex; bool current_en; bool desired_en; u8 bit; }; #define MIPS_CORE_IRQ_LINES 8 static struct octeon_core_chip_data octeon_irq_core_chip_data[MIPS_CORE_IRQ_LINES]; static int octeon_irq_set_ciu_mapping(int irq, int line, int bit, int gpio_line, struct irq_chip *chip, irq_flow_handler_t handler) { struct octeon_ciu_chip_data *cd; cd = kzalloc(sizeof(*cd), GFP_KERNEL); if (!cd) return -ENOMEM; irq_set_chip_and_handler(irq, chip, handler); cd->line = line; cd->bit = bit; cd->gpio_line = gpio_line; irq_set_chip_data(irq, cd); octeon_irq_ciu_to_irq[line][bit] = irq; return 0; } static void octeon_irq_free_cd(struct irq_domain *d, unsigned int irq) { struct irq_data *data = irq_get_irq_data(irq); struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data); irq_set_chip_data(irq, NULL); kfree(cd); } static int octeon_irq_force_ciu_mapping(struct irq_domain *domain, int irq, int line, int bit) { return irq_domain_associate(domain, irq, line << 6 | bit); } static int octeon_coreid_for_cpu(int cpu) { #ifdef CONFIG_SMP return cpu_logical_map(cpu); #else return cvmx_get_core_num(); #endif } static int octeon_cpu_for_coreid(int coreid) { #ifdef CONFIG_SMP return cpu_number_map(coreid); #else return smp_processor_id(); #endif } static void octeon_irq_core_ack(struct irq_data *data) { struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data); unsigned int bit = cd->bit; /* * We don't need to disable IRQs to make these atomic since * they are already disabled earlier in the low level * interrupt code. */ clear_c0_status(0x100 << bit); /* The two user interrupts must be cleared manually. */ if (bit < 2) clear_c0_cause(0x100 << bit); } static void octeon_irq_core_eoi(struct irq_data *data) { struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data); /* * We don't need to disable IRQs to make these atomic since * they are already disabled earlier in the low level * interrupt code. */ set_c0_status(0x100 << cd->bit); } static void octeon_irq_core_set_enable_local(void *arg) { struct irq_data *data = arg; struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data); unsigned int mask = 0x100 << cd->bit; /* * Interrupts are already disabled, so these are atomic. */ if (cd->desired_en) set_c0_status(mask); else clear_c0_status(mask); } static void octeon_irq_core_disable(struct irq_data *data) { struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data); cd->desired_en = false; } static void octeon_irq_core_enable(struct irq_data *data) { struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data); cd->desired_en = true; } static void octeon_irq_core_bus_lock(struct irq_data *data) { struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data); mutex_lock(&cd->core_irq_mutex); } static void octeon_irq_core_bus_sync_unlock(struct irq_data *data) { struct octeon_core_chip_data *cd = irq_data_get_irq_chip_data(data); if (cd->desired_en != cd->current_en) { on_each_cpu(octeon_irq_core_set_enable_local, data, 1); cd->current_en = cd->desired_en; } mutex_unlock(&cd->core_irq_mutex); } static struct irq_chip octeon_irq_chip_core = { .name = "Core", .irq_enable = octeon_irq_core_enable, .irq_disable = octeon_irq_core_disable, .irq_ack = octeon_irq_core_ack, .irq_eoi = octeon_irq_core_eoi, .irq_bus_lock = octeon_irq_core_bus_lock, .irq_bus_sync_unlock = octeon_irq_core_bus_sync_unlock, .irq_cpu_online = octeon_irq_core_eoi, .irq_cpu_offline = octeon_irq_core_ack, .flags = IRQCHIP_ONOFFLINE_ENABLED, }; static void __init octeon_irq_init_core(void) { int i; int irq; struct octeon_core_chip_data *cd; for (i = 0; i < MIPS_CORE_IRQ_LINES; i++) { cd = &octeon_irq_core_chip_data[i]; cd->current_en = false; cd->desired_en = false; cd->bit = i; mutex_init(&cd->core_irq_mutex); irq = OCTEON_IRQ_SW0 + i; irq_set_chip_data(irq, cd); irq_set_chip_and_handler(irq, &octeon_irq_chip_core, handle_percpu_irq); } } static int next_cpu_for_irq(struct irq_data *data) { #ifdef CONFIG_SMP int cpu; struct cpumask *mask = irq_data_get_affinity_mask(data); int weight = cpumask_weight(mask); struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data); if (weight > 1) { cpu = cd->current_cpu; for (;;) { cpu = cpumask_next(cpu, mask); if (cpu >= nr_cpu_ids) { cpu = -1; continue; } else if (cpumask_test_cpu(cpu, cpu_online_mask)) { break; } } } else if (weight == 1) { cpu = cpumask_first(mask); } else { cpu = smp_processor_id(); } cd->current_cpu = cpu; return cpu; #else return smp_processor_id(); #endif } static void octeon_irq_ciu_enable(struct irq_data *data) { int cpu = next_cpu_for_irq(data); int coreid = octeon_coreid_for_cpu(cpu); unsigned long *pen; unsigned long flags; struct octeon_ciu_chip_data *cd; raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu); cd = irq_data_get_irq_chip_data(data); raw_spin_lock_irqsave(lock, flags); if (cd->line == 0) { pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu); __set_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. */ wmb(); cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen); } else { pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu); __set_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. */ wmb(); cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen); } raw_spin_unlock_irqrestore(lock, flags); } static void octeon_irq_ciu_enable_local(struct irq_data *data) { unsigned long *pen; unsigned long flags; struct octeon_ciu_chip_data *cd; raw_spinlock_t *lock = this_cpu_ptr(&octeon_irq_ciu_spinlock); cd = irq_data_get_irq_chip_data(data); raw_spin_lock_irqsave(lock, flags); if (cd->line == 0) { pen = this_cpu_ptr(&octeon_irq_ciu0_en_mirror); __set_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. */ wmb(); cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2), *pen); } else { pen = this_cpu_ptr(&octeon_irq_ciu1_en_mirror); __set_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. */ wmb(); cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1), *pen); } raw_spin_unlock_irqrestore(lock, flags); } static void octeon_irq_ciu_disable_local(struct irq_data *data) { unsigned long *pen; unsigned long flags; struct octeon_ciu_chip_data *cd; raw_spinlock_t *lock = this_cpu_ptr(&octeon_irq_ciu_spinlock); cd = irq_data_get_irq_chip_data(data); raw_spin_lock_irqsave(lock, flags); if (cd->line == 0) { pen = this_cpu_ptr(&octeon_irq_ciu0_en_mirror); __clear_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. */ wmb(); cvmx_write_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2), *pen); } else { pen = this_cpu_ptr(&octeon_irq_ciu1_en_mirror); __clear_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. */ wmb(); cvmx_write_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1), *pen); } raw_spin_unlock_irqrestore(lock, flags); } static void octeon_irq_ciu_disable_all(struct irq_data *data) { unsigned long flags; unsigned long *pen; int cpu; struct octeon_ciu_chip_data *cd; raw_spinlock_t *lock; cd = irq_data_get_irq_chip_data(data); for_each_online_cpu(cpu) { int coreid = octeon_coreid_for_cpu(cpu); lock = &per_cpu(octeon_irq_ciu_spinlock, cpu); if (cd->line == 0) pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu); else pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu); raw_spin_lock_irqsave(lock, flags); __clear_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. */ wmb(); if (cd->line == 0) cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen); else cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen); raw_spin_unlock_irqrestore(lock, flags); } } static void octeon_irq_ciu_enable_all(struct irq_data *data) { unsigned long flags; unsigned long *pen; int cpu; struct octeon_ciu_chip_data *cd; raw_spinlock_t *lock; cd = irq_data_get_irq_chip_data(data); for_each_online_cpu(cpu) { int coreid = octeon_coreid_for_cpu(cpu); lock = &per_cpu(octeon_irq_ciu_spinlock, cpu); if (cd->line == 0) pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu); else pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu); raw_spin_lock_irqsave(lock, flags); __set_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. */ wmb(); if (cd->line == 0) cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen); else cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen); raw_spin_unlock_irqrestore(lock, flags); } } /* * Enable the irq on the next core in the affinity set for chips that * have the EN*_W1{S,C} registers. */ static void octeon_irq_ciu_enable_v2(struct irq_data *data) { u64 mask; int cpu = next_cpu_for_irq(data); struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); /* * Called under the desc lock, so these should never get out * of sync. */ if (cd->line == 0) { int index = octeon_coreid_for_cpu(cpu) * 2; set_bit(cd->bit, &per_cpu(octeon_irq_ciu0_en_mirror, cpu)); cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask); } else { int index = octeon_coreid_for_cpu(cpu) * 2 + 1; set_bit(cd->bit, &per_cpu(octeon_irq_ciu1_en_mirror, cpu)); cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask); } } /* * Enable the irq in the sum2 registers. */ static void octeon_irq_ciu_enable_sum2(struct irq_data *data) { u64 mask; int cpu = next_cpu_for_irq(data); int index = octeon_coreid_for_cpu(cpu); struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1S(index), mask); } /* * Disable the irq in the sum2 registers. */ static void octeon_irq_ciu_disable_local_sum2(struct irq_data *data) { u64 mask; int cpu = next_cpu_for_irq(data); int index = octeon_coreid_for_cpu(cpu); struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(index), mask); } static void octeon_irq_ciu_ack_sum2(struct irq_data *data) { u64 mask; int cpu = next_cpu_for_irq(data); int index = octeon_coreid_for_cpu(cpu); struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); cvmx_write_csr(CVMX_CIU_SUM2_PPX_IP4(index), mask); } static void octeon_irq_ciu_disable_all_sum2(struct irq_data *data) { int cpu; struct octeon_ciu_chip_data *cd; u64 mask; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); for_each_online_cpu(cpu) { int coreid = octeon_coreid_for_cpu(cpu); cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(coreid), mask); } } /* * Enable the irq on the current CPU for chips that * have the EN*_W1{S,C} registers. */ static void octeon_irq_ciu_enable_local_v2(struct irq_data *data) { u64 mask; struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); if (cd->line == 0) { int index = cvmx_get_core_num() * 2; set_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu0_en_mirror)); cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask); } else { int index = cvmx_get_core_num() * 2 + 1; set_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu1_en_mirror)); cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask); } } static void octeon_irq_ciu_disable_local_v2(struct irq_data *data) { u64 mask; struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); if (cd->line == 0) { int index = cvmx_get_core_num() * 2; clear_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu0_en_mirror)); cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask); } else { int index = cvmx_get_core_num() * 2 + 1; clear_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu1_en_mirror)); cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask); } } /* * Write to the W1C bit in CVMX_CIU_INTX_SUM0 to clear the irq. */ static void octeon_irq_ciu_ack(struct irq_data *data) { u64 mask; struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); if (cd->line == 0) { int index = cvmx_get_core_num() * 2; cvmx_write_csr(CVMX_CIU_INTX_SUM0(index), mask); } else { cvmx_write_csr(CVMX_CIU_INT_SUM1, mask); } } /* * Disable the irq on the all cores for chips that have the EN*_W1{S,C} * registers. */ static void octeon_irq_ciu_disable_all_v2(struct irq_data *data) { int cpu; u64 mask; struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); if (cd->line == 0) { for_each_online_cpu(cpu) { int index = octeon_coreid_for_cpu(cpu) * 2; clear_bit(cd->bit, &per_cpu(octeon_irq_ciu0_en_mirror, cpu)); cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask); } } else { for_each_online_cpu(cpu) { int index = octeon_coreid_for_cpu(cpu) * 2 + 1; clear_bit(cd->bit, &per_cpu(octeon_irq_ciu1_en_mirror, cpu)); cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask); } } } /* * Enable the irq on the all cores for chips that have the EN*_W1{S,C} * registers. */ static void octeon_irq_ciu_enable_all_v2(struct irq_data *data) { int cpu; u64 mask; struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); if (cd->line == 0) { for_each_online_cpu(cpu) { int index = octeon_coreid_for_cpu(cpu) * 2; set_bit(cd->bit, &per_cpu(octeon_irq_ciu0_en_mirror, cpu)); cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask); } } else { for_each_online_cpu(cpu) { int index = octeon_coreid_for_cpu(cpu) * 2 + 1; set_bit(cd->bit, &per_cpu(octeon_irq_ciu1_en_mirror, cpu)); cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask); } } } static int octeon_irq_ciu_set_type(struct irq_data *data, unsigned int t) { irqd_set_trigger_type(data, t); if (t & IRQ_TYPE_EDGE_BOTH) irq_set_handler_locked(data, handle_edge_irq); else irq_set_handler_locked(data, handle_level_irq); return IRQ_SET_MASK_OK; } static void octeon_irq_gpio_setup(struct irq_data *data) { union cvmx_gpio_bit_cfgx cfg; struct octeon_ciu_chip_data *cd; u32 t = irqd_get_trigger_type(data); cd = irq_data_get_irq_chip_data(data); cfg.u64 = 0; cfg.s.int_en = 1; cfg.s.int_type = (t & IRQ_TYPE_EDGE_BOTH) != 0; cfg.s.rx_xor = (t & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING)) != 0; /* 140 nS glitch filter*/ cfg.s.fil_cnt = 7; cfg.s.fil_sel = 3; cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), cfg.u64); } static void octeon_irq_ciu_enable_gpio_v2(struct irq_data *data) { octeon_irq_gpio_setup(data); octeon_irq_ciu_enable_v2(data); } static void octeon_irq_ciu_enable_gpio(struct irq_data *data) { octeon_irq_gpio_setup(data); octeon_irq_ciu_enable(data); } static int octeon_irq_ciu_gpio_set_type(struct irq_data *data, unsigned int t) { irqd_set_trigger_type(data, t); octeon_irq_gpio_setup(data); if (t & IRQ_TYPE_EDGE_BOTH) irq_set_handler_locked(data, handle_edge_irq); else irq_set_handler_locked(data, handle_level_irq); return IRQ_SET_MASK_OK; } static void octeon_irq_ciu_disable_gpio_v2(struct irq_data *data) { struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0); octeon_irq_ciu_disable_all_v2(data); } static void octeon_irq_ciu_disable_gpio(struct irq_data *data) { struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0); octeon_irq_ciu_disable_all(data); } static void octeon_irq_ciu_gpio_ack(struct irq_data *data) { struct octeon_ciu_chip_data *cd; u64 mask; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->gpio_line); cvmx_write_csr(CVMX_GPIO_INT_CLR, mask); } #ifdef CONFIG_SMP static void octeon_irq_cpu_offline_ciu(struct irq_data *data) { int cpu = smp_processor_id(); cpumask_t new_affinity; struct cpumask *mask = irq_data_get_affinity_mask(data); if (!cpumask_test_cpu(cpu, mask)) return; if (cpumask_weight(mask) > 1) { /* * It has multi CPU affinity, just remove this CPU * from the affinity set. */ cpumask_copy(&new_affinity, mask); cpumask_clear_cpu(cpu, &new_affinity); } else { /* Otherwise, put it on lowest numbered online CPU. */ cpumask_clear(&new_affinity); cpumask_set_cpu(cpumask_first(cpu_online_mask), &new_affinity); } irq_set_affinity_locked(data, &new_affinity, false); } static int octeon_irq_ciu_set_affinity(struct irq_data *data, const struct cpumask *dest, bool force) { int cpu; bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data); unsigned long flags; struct octeon_ciu_chip_data *cd; unsigned long *pen; raw_spinlock_t *lock; cd = irq_data_get_irq_chip_data(data); /* * For non-v2 CIU, we will allow only single CPU affinity. * This removes the need to do locking in the .ack/.eoi * functions. */ if (cpumask_weight(dest) != 1) return -EINVAL; if (!enable_one) return 0; for_each_online_cpu(cpu) { int coreid = octeon_coreid_for_cpu(cpu); lock = &per_cpu(octeon_irq_ciu_spinlock, cpu); raw_spin_lock_irqsave(lock, flags); if (cd->line == 0) pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu); else pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu); if (cpumask_test_cpu(cpu, dest) && enable_one) { enable_one = false; __set_bit(cd->bit, pen); } else { __clear_bit(cd->bit, pen); } /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. */ wmb(); if (cd->line == 0) cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen); else cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen); raw_spin_unlock_irqrestore(lock, flags); } return 0; } /* * Set affinity for the irq for chips that have the EN*_W1{S,C} * registers. */ static int octeon_irq_ciu_set_affinity_v2(struct irq_data *data, const struct cpumask *dest, bool force) { int cpu; bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data); u64 mask; struct octeon_ciu_chip_data *cd; if (!enable_one) return 0; cd = irq_data_get_irq_chip_data(data); mask = 1ull << cd->bit; if (cd->line == 0) { for_each_online_cpu(cpu) { unsigned long *pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu); int index = octeon_coreid_for_cpu(cpu) * 2; if (cpumask_test_cpu(cpu, dest) && enable_one) { enable_one = false; set_bit(cd->bit, pen); cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask); } else { clear_bit(cd->bit, pen); cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask); } } } else { for_each_online_cpu(cpu) { unsigned long *pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu); int index = octeon_coreid_for_cpu(cpu) * 2 + 1; if (cpumask_test_cpu(cpu, dest) && enable_one) { enable_one = false; set_bit(cd->bit, pen); cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask); } else { clear_bit(cd->bit, pen); cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask); } } } return 0; } static int octeon_irq_ciu_set_affinity_sum2(struct irq_data *data, const struct cpumask *dest, bool force) { int cpu; bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data); u64 mask; struct octeon_ciu_chip_data *cd; if (!enable_one) return 0; cd = irq_data_get_irq_chip_data(data); mask = 1ull << cd->bit; for_each_online_cpu(cpu) { int index = octeon_coreid_for_cpu(cpu); if (cpumask_test_cpu(cpu, dest) && enable_one) { enable_one = false; cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1S(index), mask); } else { cvmx_write_csr(CVMX_CIU_EN2_PPX_IP4_W1C(index), mask); } } return 0; } #endif static unsigned int edge_startup(struct irq_data *data) { /* ack any pending edge-irq at startup, so there is * an _edge_ to fire on when the event reappears. */ data->chip->irq_ack(data); data->chip->irq_enable(data); return 0; } /* * Newer octeon chips have support for lockless CIU operation. */ static struct irq_chip octeon_irq_chip_ciu_v2 = { .name = "CIU", .irq_enable = octeon_irq_ciu_enable_v2, .irq_disable = octeon_irq_ciu_disable_all_v2, .irq_mask = octeon_irq_ciu_disable_local_v2, .irq_unmask = octeon_irq_ciu_enable_v2, #ifdef CONFIG_SMP .irq_set_affinity = octeon_irq_ciu_set_affinity_v2, .irq_cpu_offline = octeon_irq_cpu_offline_ciu, #endif }; static struct irq_chip octeon_irq_chip_ciu_v2_edge = { .name = "CIU", .irq_enable = octeon_irq_ciu_enable_v2, .irq_disable = octeon_irq_ciu_disable_all_v2, .irq_ack = octeon_irq_ciu_ack, .irq_mask = octeon_irq_ciu_disable_local_v2, .irq_unmask = octeon_irq_ciu_enable_v2, #ifdef CONFIG_SMP .irq_set_affinity = octeon_irq_ciu_set_affinity_v2, .irq_cpu_offline = octeon_irq_cpu_offline_ciu, #endif }; /* * Newer octeon chips have support for lockless CIU operation. */ static struct irq_chip octeon_irq_chip_ciu_sum2 = { .name = "CIU", .irq_enable = octeon_irq_ciu_enable_sum2, .irq_disable = octeon_irq_ciu_disable_all_sum2, .irq_mask = octeon_irq_ciu_disable_local_sum2, .irq_unmask = octeon_irq_ciu_enable_sum2, #ifdef CONFIG_SMP .irq_set_affinity = octeon_irq_ciu_set_affinity_sum2, .irq_cpu_offline = octeon_irq_cpu_offline_ciu, #endif }; static struct irq_chip octeon_irq_chip_ciu_sum2_edge = { .name = "CIU", .irq_enable = octeon_irq_ciu_enable_sum2, .irq_disable = octeon_irq_ciu_disable_all_sum2, .irq_ack = octeon_irq_ciu_ack_sum2, .irq_mask = octeon_irq_ciu_disable_local_sum2, .irq_unmask = octeon_irq_ciu_enable_sum2, #ifdef CONFIG_SMP .irq_set_affinity = octeon_irq_ciu_set_affinity_sum2, .irq_cpu_offline = octeon_irq_cpu_offline_ciu, #endif }; static struct irq_chip octeon_irq_chip_ciu = { .name = "CIU", .irq_enable = octeon_irq_ciu_enable, .irq_disable = octeon_irq_ciu_disable_all, .irq_mask = octeon_irq_ciu_disable_local, .irq_unmask = octeon_irq_ciu_enable, #ifdef CONFIG_SMP .irq_set_affinity = octeon_irq_ciu_set_affinity, .irq_cpu_offline = octeon_irq_cpu_offline_ciu, #endif }; static struct irq_chip octeon_irq_chip_ciu_edge = { .name = "CIU", .irq_enable = octeon_irq_ciu_enable, .irq_disable = octeon_irq_ciu_disable_all, .irq_ack = octeon_irq_ciu_ack, .irq_mask = octeon_irq_ciu_disable_local, .irq_unmask = octeon_irq_ciu_enable, #ifdef CONFIG_SMP .irq_set_affinity = octeon_irq_ciu_set_affinity, .irq_cpu_offline = octeon_irq_cpu_offline_ciu, #endif }; /* The mbox versions don't do any affinity or round-robin. */ static struct irq_chip octeon_irq_chip_ciu_mbox_v2 = { .name = "CIU-M", .irq_enable = octeon_irq_ciu_enable_all_v2, .irq_disable = octeon_irq_ciu_disable_all_v2, .irq_ack = octeon_irq_ciu_disable_local_v2, .irq_eoi = octeon_irq_ciu_enable_local_v2, .irq_cpu_online = octeon_irq_ciu_enable_local_v2, .irq_cpu_offline = octeon_irq_ciu_disable_local_v2, .flags = IRQCHIP_ONOFFLINE_ENABLED, }; static struct irq_chip octeon_irq_chip_ciu_mbox = { .name = "CIU-M", .irq_enable = octeon_irq_ciu_enable_all, .irq_disable = octeon_irq_ciu_disable_all, .irq_ack = octeon_irq_ciu_disable_local, .irq_eoi = octeon_irq_ciu_enable_local, .irq_cpu_online = octeon_irq_ciu_enable_local, .irq_cpu_offline = octeon_irq_ciu_disable_local, .flags = IRQCHIP_ONOFFLINE_ENABLED, }; static struct irq_chip octeon_irq_chip_ciu_gpio_v2 = { .name = "CIU-GPIO", .irq_enable = octeon_irq_ciu_enable_gpio_v2, .irq_disable = octeon_irq_ciu_disable_gpio_v2, .irq_ack = octeon_irq_ciu_gpio_ack, .irq_mask = octeon_irq_ciu_disable_local_v2, .irq_unmask = octeon_irq_ciu_enable_v2, .irq_set_type = octeon_irq_ciu_gpio_set_type, #ifdef CONFIG_SMP .irq_set_affinity = octeon_irq_ciu_set_affinity_v2, .irq_cpu_offline = octeon_irq_cpu_offline_ciu, #endif .flags = IRQCHIP_SET_TYPE_MASKED, }; static struct irq_chip octeon_irq_chip_ciu_gpio = { .name = "CIU-GPIO", .irq_enable = octeon_irq_ciu_enable_gpio, .irq_disable = octeon_irq_ciu_disable_gpio, .irq_mask = octeon_irq_ciu_disable_local, .irq_unmask = octeon_irq_ciu_enable, .irq_ack = octeon_irq_ciu_gpio_ack, .irq_set_type = octeon_irq_ciu_gpio_set_type, #ifdef CONFIG_SMP .irq_set_affinity = octeon_irq_ciu_set_affinity, .irq_cpu_offline = octeon_irq_cpu_offline_ciu, #endif .flags = IRQCHIP_SET_TYPE_MASKED, }; /* * Watchdog interrupts are special. They are associated with a single * core, so we hardwire the affinity to that core. */ static void octeon_irq_ciu_wd_enable(struct irq_data *data) { unsigned long flags; unsigned long *pen; int coreid = data->irq - OCTEON_IRQ_WDOG0; /* Bit 0-63 of EN1 */ int cpu = octeon_cpu_for_coreid(coreid); raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu); raw_spin_lock_irqsave(lock, flags); pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu); __set_bit(coreid, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before enabling * the irq. */ wmb(); cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), *pen); raw_spin_unlock_irqrestore(lock, flags); } /* * Watchdog interrupts are special. They are associated with a single * core, so we hardwire the affinity to that core. */ static void octeon_irq_ciu1_wd_enable_v2(struct irq_data *data) { int coreid = data->irq - OCTEON_IRQ_WDOG0; int cpu = octeon_cpu_for_coreid(coreid); set_bit(coreid, &per_cpu(octeon_irq_ciu1_en_mirror, cpu)); cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(coreid * 2 + 1), 1ull << coreid); } static struct irq_chip octeon_irq_chip_ciu_wd_v2 = { .name = "CIU-W", .irq_enable = octeon_irq_ciu1_wd_enable_v2, .irq_disable = octeon_irq_ciu_disable_all_v2, .irq_mask = octeon_irq_ciu_disable_local_v2, .irq_unmask = octeon_irq_ciu_enable_local_v2, }; static struct irq_chip octeon_irq_chip_ciu_wd = { .name = "CIU-W", .irq_enable = octeon_irq_ciu_wd_enable, .irq_disable = octeon_irq_ciu_disable_all, .irq_mask = octeon_irq_ciu_disable_local, .irq_unmask = octeon_irq_ciu_enable_local, }; static bool octeon_irq_ciu_is_edge(unsigned int line, unsigned int bit) { bool edge = false; if (line == 0) switch (bit) { case 48 ... 49: /* GMX DRP */ case 50: /* IPD_DRP */ case 52 ... 55: /* Timers */ case 58: /* MPI */ edge = true; break; default: break; } else /* line == 1 */ switch (bit) { case 47: /* PTP */ edge = true; break; default: break; } return edge; } struct octeon_irq_gpio_domain_data { unsigned int base_hwirq; }; static int octeon_irq_gpio_xlat(struct irq_domain *d, struct device_node *node, const u32 *intspec, unsigned int intsize, unsigned long *out_hwirq, unsigned int *out_type) { unsigned int type; unsigned int pin; unsigned int trigger; if (irq_domain_get_of_node(d) != node) return -EINVAL; if (intsize < 2) return -EINVAL; pin = intspec[0]; if (pin >= 16) return -EINVAL; trigger = intspec[1]; switch (trigger) { case 1: type = IRQ_TYPE_EDGE_RISING; break; case 2: type = IRQ_TYPE_EDGE_FALLING; break; case 4: type = IRQ_TYPE_LEVEL_HIGH; break; case 8: type = IRQ_TYPE_LEVEL_LOW; break; default: pr_err("Error: (%pOFn) Invalid irq trigger specification: %x\n", node, trigger); type = IRQ_TYPE_LEVEL_LOW; break; } *out_type = type; *out_hwirq = pin; return 0; } static int octeon_irq_ciu_xlat(struct irq_domain *d, struct device_node *node, const u32 *intspec, unsigned int intsize, unsigned long *out_hwirq, unsigned int *out_type) { unsigned int ciu, bit; struct octeon_irq_ciu_domain_data *dd = d->host_data; ciu = intspec[0]; bit = intspec[1]; if (ciu >= dd->num_sum || bit > 63) return -EINVAL; *out_hwirq = (ciu << 6) | bit; *out_type = 0; return 0; } static struct irq_chip *octeon_irq_ciu_chip; static struct irq_chip *octeon_irq_ciu_chip_edge; static struct irq_chip *octeon_irq_gpio_chip; static int octeon_irq_ciu_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw) { int rv; unsigned int line = hw >> 6; unsigned int bit = hw & 63; struct octeon_irq_ciu_domain_data *dd = d->host_data; if (line >= dd->num_sum || octeon_irq_ciu_to_irq[line][bit] != 0) return -EINVAL; if (line == 2) { if (octeon_irq_ciu_is_edge(line, bit)) rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0, &octeon_irq_chip_ciu_sum2_edge, handle_edge_irq); else rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0, &octeon_irq_chip_ciu_sum2, handle_level_irq); } else { if (octeon_irq_ciu_is_edge(line, bit)) rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0, octeon_irq_ciu_chip_edge, handle_edge_irq); else rv = octeon_irq_set_ciu_mapping(virq, line, bit, 0, octeon_irq_ciu_chip, handle_level_irq); } return rv; } static int octeon_irq_gpio_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw) { struct octeon_irq_gpio_domain_data *gpiod = d->host_data; unsigned int line, bit; int r; line = (hw + gpiod->base_hwirq) >> 6; bit = (hw + gpiod->base_hwirq) & 63; if (line >= ARRAY_SIZE(octeon_irq_ciu_to_irq) || octeon_irq_ciu_to_irq[line][bit] != 0) return -EINVAL; /* * Default to handle_level_irq. If the DT contains a different * trigger type, it will call the irq_set_type callback and * the handler gets updated. */ r = octeon_irq_set_ciu_mapping(virq, line, bit, hw, octeon_irq_gpio_chip, handle_level_irq); return r; } static struct irq_domain_ops octeon_irq_domain_ciu_ops = { .map = octeon_irq_ciu_map, .unmap = octeon_irq_free_cd, .xlate = octeon_irq_ciu_xlat, }; static struct irq_domain_ops octeon_irq_domain_gpio_ops = { .map = octeon_irq_gpio_map, .unmap = octeon_irq_free_cd, .xlate = octeon_irq_gpio_xlat, }; static void octeon_irq_ip2_ciu(void) { const unsigned long core_id = cvmx_get_core_num(); u64 ciu_sum = cvmx_read_csr(CVMX_CIU_INTX_SUM0(core_id * 2)); ciu_sum &= __this_cpu_read(octeon_irq_ciu0_en_mirror); if (likely(ciu_sum)) { int bit = fls64(ciu_sum) - 1; int irq = octeon_irq_ciu_to_irq[0][bit]; if (likely(irq)) do_IRQ(irq); else spurious_interrupt(); } else { spurious_interrupt(); } } static void octeon_irq_ip3_ciu(void) { u64 ciu_sum = cvmx_read_csr(CVMX_CIU_INT_SUM1); ciu_sum &= __this_cpu_read(octeon_irq_ciu1_en_mirror); if (likely(ciu_sum)) { int bit = fls64(ciu_sum) - 1; int irq = octeon_irq_ciu_to_irq[1][bit]; if (likely(irq)) do_IRQ(irq); else spurious_interrupt(); } else { spurious_interrupt(); } } static void octeon_irq_ip4_ciu(void) { int coreid = cvmx_get_core_num(); u64 ciu_sum = cvmx_read_csr(CVMX_CIU_SUM2_PPX_IP4(coreid)); u64 ciu_en = cvmx_read_csr(CVMX_CIU_EN2_PPX_IP4(coreid)); ciu_sum &= ciu_en; if (likely(ciu_sum)) { int bit = fls64(ciu_sum) - 1; int irq = octeon_irq_ciu_to_irq[2][bit]; if (likely(irq)) do_IRQ(irq); else spurious_interrupt(); } else { spurious_interrupt(); } } static bool octeon_irq_use_ip4; static void octeon_irq_local_enable_ip4(void *arg) { set_c0_status(STATUSF_IP4); } static void octeon_irq_ip4_mask(void) { clear_c0_status(STATUSF_IP4); spurious_interrupt(); } static void (*octeon_irq_ip2)(void); static void (*octeon_irq_ip3)(void); static void (*octeon_irq_ip4)(void); void (*octeon_irq_setup_secondary)(void); void octeon_irq_set_ip4_handler(octeon_irq_ip4_handler_t h) { octeon_irq_ip4 = h; octeon_irq_use_ip4 = true; on_each_cpu(octeon_irq_local_enable_ip4, NULL, 1); } static void octeon_irq_percpu_enable(void) { irq_cpu_online(); } static void octeon_irq_init_ciu_percpu(void) { int coreid = cvmx_get_core_num(); __this_cpu_write(octeon_irq_ciu0_en_mirror, 0); __this_cpu_write(octeon_irq_ciu1_en_mirror, 0); wmb(); raw_spin_lock_init(this_cpu_ptr(&octeon_irq_ciu_spinlock)); /* * Disable All CIU Interrupts. The ones we need will be * enabled later. Read the SUM register so we know the write * completed. */ cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2)), 0); cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2 + 1)), 0); cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2)), 0); cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2 + 1)), 0); cvmx_read_csr(CVMX_CIU_INTX_SUM0((coreid * 2))); } static void octeon_irq_init_ciu2_percpu(void) { u64 regx, ipx; int coreid = cvmx_get_core_num(); u64 base = CVMX_CIU2_EN_PPX_IP2_WRKQ(coreid); /* * Disable All CIU2 Interrupts. The ones we need will be * enabled later. Read the SUM register so we know the write * completed. * * There are 9 registers and 3 IPX levels with strides 0x1000 * and 0x200 respectivly. Use loops to clear them. */ for (regx = 0; regx <= 0x8000; regx += 0x1000) { for (ipx = 0; ipx <= 0x400; ipx += 0x200) cvmx_write_csr(base + regx + ipx, 0); } cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP2(coreid)); } static void octeon_irq_setup_secondary_ciu(void) { octeon_irq_init_ciu_percpu(); octeon_irq_percpu_enable(); /* Enable the CIU lines */ set_c0_status(STATUSF_IP3 | STATUSF_IP2); if (octeon_irq_use_ip4) set_c0_status(STATUSF_IP4); else clear_c0_status(STATUSF_IP4); } static void octeon_irq_setup_secondary_ciu2(void) { octeon_irq_init_ciu2_percpu(); octeon_irq_percpu_enable(); /* Enable the CIU lines */ set_c0_status(STATUSF_IP3 | STATUSF_IP2); if (octeon_irq_use_ip4) set_c0_status(STATUSF_IP4); else clear_c0_status(STATUSF_IP4); } static int __init octeon_irq_init_ciu( struct device_node *ciu_node, struct device_node *parent) { unsigned int i, r; struct irq_chip *chip; struct irq_chip *chip_edge; struct irq_chip *chip_mbox; struct irq_chip *chip_wd; struct irq_domain *ciu_domain = NULL; struct octeon_irq_ciu_domain_data *dd; dd = kzalloc(sizeof(*dd), GFP_KERNEL); if (!dd) return -ENOMEM; octeon_irq_init_ciu_percpu(); octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu; octeon_irq_ip2 = octeon_irq_ip2_ciu; octeon_irq_ip3 = octeon_irq_ip3_ciu; if ((OCTEON_IS_OCTEON2() || OCTEON_IS_OCTEON3()) && !OCTEON_IS_MODEL(OCTEON_CN63XX)) { octeon_irq_ip4 = octeon_irq_ip4_ciu; dd->num_sum = 3; octeon_irq_use_ip4 = true; } else { octeon_irq_ip4 = octeon_irq_ip4_mask; dd->num_sum = 2; octeon_irq_use_ip4 = false; } if (OCTEON_IS_MODEL(OCTEON_CN58XX_PASS2_X) || OCTEON_IS_MODEL(OCTEON_CN56XX_PASS2_X) || OCTEON_IS_MODEL(OCTEON_CN52XX_PASS2_X) || OCTEON_IS_OCTEON2() || OCTEON_IS_OCTEON3()) { chip = &octeon_irq_chip_ciu_v2; chip_edge = &octeon_irq_chip_ciu_v2_edge; chip_mbox = &octeon_irq_chip_ciu_mbox_v2; chip_wd = &octeon_irq_chip_ciu_wd_v2; octeon_irq_gpio_chip = &octeon_irq_chip_ciu_gpio_v2; } else { chip = &octeon_irq_chip_ciu; chip_edge = &octeon_irq_chip_ciu_edge; chip_mbox = &octeon_irq_chip_ciu_mbox; chip_wd = &octeon_irq_chip_ciu_wd; octeon_irq_gpio_chip = &octeon_irq_chip_ciu_gpio; } octeon_irq_ciu_chip = chip; octeon_irq_ciu_chip_edge = chip_edge; /* Mips internal */ octeon_irq_init_core(); ciu_domain = irq_domain_add_tree( ciu_node, &octeon_irq_domain_ciu_ops, dd); irq_set_default_host(ciu_domain); /* CIU_0 */ for (i = 0; i < 16; i++) { r = octeon_irq_force_ciu_mapping( ciu_domain, i + OCTEON_IRQ_WORKQ0, 0, i + 0); if (r) goto err; } r = octeon_irq_set_ciu_mapping( OCTEON_IRQ_MBOX0, 0, 32, 0, chip_mbox, handle_percpu_irq); if (r) goto err; r = octeon_irq_set_ciu_mapping( OCTEON_IRQ_MBOX1, 0, 33, 0, chip_mbox, handle_percpu_irq); if (r) goto err; for (i = 0; i < 4; i++) { r = octeon_irq_force_ciu_mapping( ciu_domain, i + OCTEON_IRQ_PCI_INT0, 0, i + 36); if (r) goto err; } for (i = 0; i < 4; i++) { r = octeon_irq_force_ciu_mapping( ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 0, i + 40); if (r) goto err; } r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI, 0, 45); if (r) goto err; r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_RML, 0, 46); if (r) goto err; for (i = 0; i < 4; i++) { r = octeon_irq_force_ciu_mapping( ciu_domain, i + OCTEON_IRQ_TIMER0, 0, i + 52); if (r) goto err; } r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI2, 0, 59); if (r) goto err; /* CIU_1 */ for (i = 0; i < 16; i++) { r = octeon_irq_set_ciu_mapping( i + OCTEON_IRQ_WDOG0, 1, i + 0, 0, chip_wd, handle_level_irq); if (r) goto err; } /* Enable the CIU lines */ set_c0_status(STATUSF_IP3 | STATUSF_IP2); if (octeon_irq_use_ip4) set_c0_status(STATUSF_IP4); else clear_c0_status(STATUSF_IP4); return 0; err: return r; } static int __init octeon_irq_init_gpio( struct device_node *gpio_node, struct device_node *parent) { struct octeon_irq_gpio_domain_data *gpiod; u32 interrupt_cells; unsigned int base_hwirq; int r; r = of_property_read_u32(parent, "#interrupt-cells", &interrupt_cells); if (r) return r; if (interrupt_cells == 1) { u32 v; r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v); if (r) { pr_warn("No \"interrupts\" property.\n"); return r; } base_hwirq = v; } else if (interrupt_cells == 2) { u32 v0, v1; r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v0); if (r) { pr_warn("No \"interrupts\" property.\n"); return r; } r = of_property_read_u32_index(gpio_node, "interrupts", 1, &v1); if (r) { pr_warn("No \"interrupts\" property.\n"); return r; } base_hwirq = (v0 << 6) | v1; } else { pr_warn("Bad \"#interrupt-cells\" property: %u\n", interrupt_cells); return -EINVAL; } gpiod = kzalloc(sizeof(*gpiod), GFP_KERNEL); if (gpiod) { /* gpio domain host_data is the base hwirq number. */ gpiod->base_hwirq = base_hwirq; irq_domain_add_linear( gpio_node, 16, &octeon_irq_domain_gpio_ops, gpiod); } else { pr_warn("Cannot allocate memory for GPIO irq_domain.\n"); return -ENOMEM; } /* * Clear the OF_POPULATED flag that was set by of_irq_init() * so that all GPIO devices will be probed. */ of_node_clear_flag(gpio_node, OF_POPULATED); return 0; } /* * Watchdog interrupts are special. They are associated with a single * core, so we hardwire the affinity to that core. */ static void octeon_irq_ciu2_wd_enable(struct irq_data *data) { u64 mask; u64 en_addr; int coreid = data->irq - OCTEON_IRQ_WDOG0; struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) + (0x1000ull * cd->line); cvmx_write_csr(en_addr, mask); } static void octeon_irq_ciu2_enable(struct irq_data *data) { u64 mask; u64 en_addr; int cpu = next_cpu_for_irq(data); int coreid = octeon_coreid_for_cpu(cpu); struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) + (0x1000ull * cd->line); cvmx_write_csr(en_addr, mask); } static void octeon_irq_ciu2_enable_local(struct irq_data *data) { u64 mask; u64 en_addr; int coreid = cvmx_get_core_num(); struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S(coreid) + (0x1000ull * cd->line); cvmx_write_csr(en_addr, mask); } static void octeon_irq_ciu2_disable_local(struct irq_data *data) { u64 mask; u64 en_addr; int coreid = cvmx_get_core_num(); struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C(coreid) + (0x1000ull * cd->line); cvmx_write_csr(en_addr, mask); } static void octeon_irq_ciu2_ack(struct irq_data *data) { u64 mask; u64 en_addr; int coreid = cvmx_get_core_num(); struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); en_addr = CVMX_CIU2_RAW_PPX_IP2_WRKQ(coreid) + (0x1000ull * cd->line); cvmx_write_csr(en_addr, mask); } static void octeon_irq_ciu2_disable_all(struct irq_data *data) { int cpu; u64 mask; struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); mask = 1ull << (cd->bit); for_each_online_cpu(cpu) { u64 en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C( octeon_coreid_for_cpu(cpu)) + (0x1000ull * cd->line); cvmx_write_csr(en_addr, mask); } } static void octeon_irq_ciu2_mbox_enable_all(struct irq_data *data) { int cpu; u64 mask; mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0); for_each_online_cpu(cpu) { u64 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1S( octeon_coreid_for_cpu(cpu)); cvmx_write_csr(en_addr, mask); } } static void octeon_irq_ciu2_mbox_disable_all(struct irq_data *data) { int cpu; u64 mask; mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0); for_each_online_cpu(cpu) { u64 en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1C( octeon_coreid_for_cpu(cpu)); cvmx_write_csr(en_addr, mask); } } static void octeon_irq_ciu2_mbox_enable_local(struct irq_data *data) { u64 mask; u64 en_addr; int coreid = cvmx_get_core_num(); mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0); en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1S(coreid); cvmx_write_csr(en_addr, mask); } static void octeon_irq_ciu2_mbox_disable_local(struct irq_data *data) { u64 mask; u64 en_addr; int coreid = cvmx_get_core_num(); mask = 1ull << (data->irq - OCTEON_IRQ_MBOX0); en_addr = CVMX_CIU2_EN_PPX_IP3_MBOX_W1C(coreid); cvmx_write_csr(en_addr, mask); } #ifdef CONFIG_SMP static int octeon_irq_ciu2_set_affinity(struct irq_data *data, const struct cpumask *dest, bool force) { int cpu; bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data); u64 mask; struct octeon_ciu_chip_data *cd; if (!enable_one) return 0; cd = irq_data_get_irq_chip_data(data); mask = 1ull << cd->bit; for_each_online_cpu(cpu) { u64 en_addr; if (cpumask_test_cpu(cpu, dest) && enable_one) { enable_one = false; en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1S( octeon_coreid_for_cpu(cpu)) + (0x1000ull * cd->line); } else { en_addr = CVMX_CIU2_EN_PPX_IP2_WRKQ_W1C( octeon_coreid_for_cpu(cpu)) + (0x1000ull * cd->line); } cvmx_write_csr(en_addr, mask); } return 0; } #endif static void octeon_irq_ciu2_enable_gpio(struct irq_data *data) { octeon_irq_gpio_setup(data); octeon_irq_ciu2_enable(data); } static void octeon_irq_ciu2_disable_gpio(struct irq_data *data) { struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), 0); octeon_irq_ciu2_disable_all(data); } static struct irq_chip octeon_irq_chip_ciu2 = { .name = "CIU2-E", .irq_enable = octeon_irq_ciu2_enable, .irq_disable = octeon_irq_ciu2_disable_all, .irq_mask = octeon_irq_ciu2_disable_local, .irq_unmask = octeon_irq_ciu2_enable, #ifdef CONFIG_SMP .irq_set_affinity = octeon_irq_ciu2_set_affinity, .irq_cpu_offline = octeon_irq_cpu_offline_ciu, #endif }; static struct irq_chip octeon_irq_chip_ciu2_edge = { .name = "CIU2-E", .irq_enable = octeon_irq_ciu2_enable, .irq_disable = octeon_irq_ciu2_disable_all, .irq_ack = octeon_irq_ciu2_ack, .irq_mask = octeon_irq_ciu2_disable_local, .irq_unmask = octeon_irq_ciu2_enable, #ifdef CONFIG_SMP .irq_set_affinity = octeon_irq_ciu2_set_affinity, .irq_cpu_offline = octeon_irq_cpu_offline_ciu, #endif }; static struct irq_chip octeon_irq_chip_ciu2_mbox = { .name = "CIU2-M", .irq_enable = octeon_irq_ciu2_mbox_enable_all, .irq_disable = octeon_irq_ciu2_mbox_disable_all, .irq_ack = octeon_irq_ciu2_mbox_disable_local, .irq_eoi = octeon_irq_ciu2_mbox_enable_local, .irq_cpu_online = octeon_irq_ciu2_mbox_enable_local, .irq_cpu_offline = octeon_irq_ciu2_mbox_disable_local, .flags = IRQCHIP_ONOFFLINE_ENABLED, }; static struct irq_chip octeon_irq_chip_ciu2_wd = { .name = "CIU2-W", .irq_enable = octeon_irq_ciu2_wd_enable, .irq_disable = octeon_irq_ciu2_disable_all, .irq_mask = octeon_irq_ciu2_disable_local, .irq_unmask = octeon_irq_ciu2_enable_local, }; static struct irq_chip octeon_irq_chip_ciu2_gpio = { .name = "CIU-GPIO", .irq_enable = octeon_irq_ciu2_enable_gpio, .irq_disable = octeon_irq_ciu2_disable_gpio, .irq_ack = octeon_irq_ciu_gpio_ack, .irq_mask = octeon_irq_ciu2_disable_local, .irq_unmask = octeon_irq_ciu2_enable, .irq_set_type = octeon_irq_ciu_gpio_set_type, #ifdef CONFIG_SMP .irq_set_affinity = octeon_irq_ciu2_set_affinity, .irq_cpu_offline = octeon_irq_cpu_offline_ciu, #endif .flags = IRQCHIP_SET_TYPE_MASKED, }; static int octeon_irq_ciu2_xlat(struct irq_domain *d, struct device_node *node, const u32 *intspec, unsigned int intsize, unsigned long *out_hwirq, unsigned int *out_type) { unsigned int ciu, bit; ciu = intspec[0]; bit = intspec[1]; *out_hwirq = (ciu << 6) | bit; *out_type = 0; return 0; } static bool octeon_irq_ciu2_is_edge(unsigned int line, unsigned int bit) { bool edge = false; if (line == 3) /* MIO */ switch (bit) { case 2: /* IPD_DRP */ case 8 ... 11: /* Timers */ case 48: /* PTP */ edge = true; break; default: break; } else if (line == 6) /* PKT */ switch (bit) { case 52 ... 53: /* ILK_DRP */ case 8 ... 12: /* GMX_DRP */ edge = true; break; default: break; } return edge; } static int octeon_irq_ciu2_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw) { unsigned int line = hw >> 6; unsigned int bit = hw & 63; /* * Don't map irq if it is reserved for GPIO. * (Line 7 are the GPIO lines.) */ if (line == 7) return 0; if (line > 7 || octeon_irq_ciu_to_irq[line][bit] != 0) return -EINVAL; if (octeon_irq_ciu2_is_edge(line, bit)) octeon_irq_set_ciu_mapping(virq, line, bit, 0, &octeon_irq_chip_ciu2_edge, handle_edge_irq); else octeon_irq_set_ciu_mapping(virq, line, bit, 0, &octeon_irq_chip_ciu2, handle_level_irq); return 0; } static struct irq_domain_ops octeon_irq_domain_ciu2_ops = { .map = octeon_irq_ciu2_map, .unmap = octeon_irq_free_cd, .xlate = octeon_irq_ciu2_xlat, }; static void octeon_irq_ciu2(void) { int line; int bit; int irq; u64 src_reg, src, sum; const unsigned long core_id = cvmx_get_core_num(); sum = cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP2(core_id)) & 0xfful; if (unlikely(!sum)) goto spurious; line = fls64(sum) - 1; src_reg = CVMX_CIU2_SRC_PPX_IP2_WRKQ(core_id) + (0x1000 * line); src = cvmx_read_csr(src_reg); if (unlikely(!src)) goto spurious; bit = fls64(src) - 1; irq = octeon_irq_ciu_to_irq[line][bit]; if (unlikely(!irq)) goto spurious; do_IRQ(irq); goto out; spurious: spurious_interrupt(); out: /* CN68XX pass 1.x has an errata that accessing the ACK registers can stop interrupts from propagating */ if (OCTEON_IS_MODEL(OCTEON_CN68XX)) cvmx_read_csr(CVMX_CIU2_INTR_CIU_READY); else cvmx_read_csr(CVMX_CIU2_ACK_PPX_IP2(core_id)); return; } static void octeon_irq_ciu2_mbox(void) { int line; const unsigned long core_id = cvmx_get_core_num(); u64 sum = cvmx_read_csr(CVMX_CIU2_SUM_PPX_IP3(core_id)) >> 60; if (unlikely(!sum)) goto spurious; line = fls64(sum) - 1; do_IRQ(OCTEON_IRQ_MBOX0 + line); goto out; spurious: spurious_interrupt(); out: /* CN68XX pass 1.x has an errata that accessing the ACK registers can stop interrupts from propagating */ if (OCTEON_IS_MODEL(OCTEON_CN68XX)) cvmx_read_csr(CVMX_CIU2_INTR_CIU_READY); else cvmx_read_csr(CVMX_CIU2_ACK_PPX_IP3(core_id)); return; } static int __init octeon_irq_init_ciu2( struct device_node *ciu_node, struct device_node *parent) { unsigned int i, r; struct irq_domain *ciu_domain = NULL; octeon_irq_init_ciu2_percpu(); octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu2; octeon_irq_gpio_chip = &octeon_irq_chip_ciu2_gpio; octeon_irq_ip2 = octeon_irq_ciu2; octeon_irq_ip3 = octeon_irq_ciu2_mbox; octeon_irq_ip4 = octeon_irq_ip4_mask; /* Mips internal */ octeon_irq_init_core(); ciu_domain = irq_domain_add_tree( ciu_node, &octeon_irq_domain_ciu2_ops, NULL); irq_set_default_host(ciu_domain); /* CUI2 */ for (i = 0; i < 64; i++) { r = octeon_irq_force_ciu_mapping( ciu_domain, i + OCTEON_IRQ_WORKQ0, 0, i); if (r) goto err; } for (i = 0; i < 32; i++) { r = octeon_irq_set_ciu_mapping(i + OCTEON_IRQ_WDOG0, 1, i, 0, &octeon_irq_chip_ciu2_wd, handle_level_irq); if (r) goto err; } for (i = 0; i < 4; i++) { r = octeon_irq_force_ciu_mapping( ciu_domain, i + OCTEON_IRQ_TIMER0, 3, i + 8); if (r) goto err; } for (i = 0; i < 4; i++) { r = octeon_irq_force_ciu_mapping( ciu_domain, i + OCTEON_IRQ_PCI_INT0, 4, i); if (r) goto err; } for (i = 0; i < 4; i++) { r = octeon_irq_force_ciu_mapping( ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 4, i + 8); if (r) goto err; } irq_set_chip_and_handler(OCTEON_IRQ_MBOX0, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq); irq_set_chip_and_handler(OCTEON_IRQ_MBOX1, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq); irq_set_chip_and_handler(OCTEON_IRQ_MBOX2, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq); irq_set_chip_and_handler(OCTEON_IRQ_MBOX3, &octeon_irq_chip_ciu2_mbox, handle_percpu_irq); /* Enable the CIU lines */ set_c0_status(STATUSF_IP3 | STATUSF_IP2); clear_c0_status(STATUSF_IP4); return 0; err: return r; } struct octeon_irq_cib_host_data { raw_spinlock_t lock; u64 raw_reg; u64 en_reg; int max_bits; }; struct octeon_irq_cib_chip_data { struct octeon_irq_cib_host_data *host_data; int bit; }; static void octeon_irq_cib_enable(struct irq_data *data) { unsigned long flags; u64 en; struct octeon_irq_cib_chip_data *cd = irq_data_get_irq_chip_data(data); struct octeon_irq_cib_host_data *host_data = cd->host_data; raw_spin_lock_irqsave(&host_data->lock, flags); en = cvmx_read_csr(host_data->en_reg); en |= 1ull << cd->bit; cvmx_write_csr(host_data->en_reg, en); raw_spin_unlock_irqrestore(&host_data->lock, flags); } static void octeon_irq_cib_disable(struct irq_data *data) { unsigned long flags; u64 en; struct octeon_irq_cib_chip_data *cd = irq_data_get_irq_chip_data(data); struct octeon_irq_cib_host_data *host_data = cd->host_data; raw_spin_lock_irqsave(&host_data->lock, flags); en = cvmx_read_csr(host_data->en_reg); en &= ~(1ull << cd->bit); cvmx_write_csr(host_data->en_reg, en); raw_spin_unlock_irqrestore(&host_data->lock, flags); } static int octeon_irq_cib_set_type(struct irq_data *data, unsigned int t) { irqd_set_trigger_type(data, t); return IRQ_SET_MASK_OK; } static struct irq_chip octeon_irq_chip_cib = { .name = "CIB", .irq_enable = octeon_irq_cib_enable, .irq_disable = octeon_irq_cib_disable, .irq_mask = octeon_irq_cib_disable, .irq_unmask = octeon_irq_cib_enable, .irq_set_type = octeon_irq_cib_set_type, }; static int octeon_irq_cib_xlat(struct irq_domain *d, struct device_node *node, const u32 *intspec, unsigned int intsize, unsigned long *out_hwirq, unsigned int *out_type) { unsigned int type = 0; if (intsize == 2) type = intspec[1]; switch (type) { case 0: /* unofficial value, but we might as well let it work. */ case 4: /* official value for level triggering. */ *out_type = IRQ_TYPE_LEVEL_HIGH; break; case 1: /* official value for edge triggering. */ *out_type = IRQ_TYPE_EDGE_RISING; break; default: /* Nothing else is acceptable. */ return -EINVAL; } *out_hwirq = intspec[0]; return 0; } static int octeon_irq_cib_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw) { struct octeon_irq_cib_host_data *host_data = d->host_data; struct octeon_irq_cib_chip_data *cd; if (hw >= host_data->max_bits) { pr_err("ERROR: %s mapping %u is to big!\n", irq_domain_get_of_node(d)->name, (unsigned)hw); return -EINVAL; } cd = kzalloc(sizeof(*cd), GFP_KERNEL); cd->host_data = host_data; cd->bit = hw; irq_set_chip_and_handler(virq, &octeon_irq_chip_cib, handle_simple_irq); irq_set_chip_data(virq, cd); return 0; } static struct irq_domain_ops octeon_irq_domain_cib_ops = { .map = octeon_irq_cib_map, .unmap = octeon_irq_free_cd, .xlate = octeon_irq_cib_xlat, }; /* Chain to real handler. */ static irqreturn_t octeon_irq_cib_handler(int my_irq, void *data) { u64 en; u64 raw; u64 bits; int i; int irq; struct irq_domain *cib_domain = data; struct octeon_irq_cib_host_data *host_data = cib_domain->host_data; en = cvmx_read_csr(host_data->en_reg); raw = cvmx_read_csr(host_data->raw_reg); bits = en & raw; for (i = 0; i < host_data->max_bits; i++) { if ((bits & 1ull << i) == 0) continue; irq = irq_find_mapping(cib_domain, i); if (!irq) { unsigned long flags; pr_err("ERROR: CIB bit %d@%llx IRQ unhandled, disabling\n", i, host_data->raw_reg); raw_spin_lock_irqsave(&host_data->lock, flags); en = cvmx_read_csr(host_data->en_reg); en &= ~(1ull << i); cvmx_write_csr(host_data->en_reg, en); cvmx_write_csr(host_data->raw_reg, 1ull << i); raw_spin_unlock_irqrestore(&host_data->lock, flags); } else { struct irq_desc *desc = irq_to_desc(irq); struct irq_data *irq_data = irq_desc_get_irq_data(desc); /* If edge, acknowledge the bit we will be sending. */ if (irqd_get_trigger_type(irq_data) & IRQ_TYPE_EDGE_BOTH) cvmx_write_csr(host_data->raw_reg, 1ull << i); generic_handle_irq_desc(desc); } } return IRQ_HANDLED; } static int __init octeon_irq_init_cib(struct device_node *ciu_node, struct device_node *parent) { const __be32 *addr; u32 val; struct octeon_irq_cib_host_data *host_data; int parent_irq; int r; struct irq_domain *cib_domain; parent_irq = irq_of_parse_and_map(ciu_node, 0); if (!parent_irq) { pr_err("ERROR: Couldn't acquire parent_irq for %pOFn\n", ciu_node); return -EINVAL; } host_data = kzalloc(sizeof(*host_data), GFP_KERNEL); if (!host_data) return -ENOMEM; raw_spin_lock_init(&host_data->lock); addr = of_get_address(ciu_node, 0, NULL, NULL); if (!addr) { pr_err("ERROR: Couldn't acquire reg(0) %pOFn\n", ciu_node); return -EINVAL; } host_data->raw_reg = (u64)phys_to_virt( of_translate_address(ciu_node, addr)); addr = of_get_address(ciu_node, 1, NULL, NULL); if (!addr) { pr_err("ERROR: Couldn't acquire reg(1) %pOFn\n", ciu_node); return -EINVAL; } host_data->en_reg = (u64)phys_to_virt( of_translate_address(ciu_node, addr)); r = of_property_read_u32(ciu_node, "cavium,max-bits", &val); if (r) { pr_err("ERROR: Couldn't read cavium,max-bits from %pOFn\n", ciu_node); return r; } host_data->max_bits = val; cib_domain = irq_domain_add_linear(ciu_node, host_data->max_bits, &octeon_irq_domain_cib_ops, host_data); if (!cib_domain) { pr_err("ERROR: Couldn't irq_domain_add_linear()\n"); return -ENOMEM; } cvmx_write_csr(host_data->en_reg, 0); /* disable all IRQs */ cvmx_write_csr(host_data->raw_reg, ~0); /* ack any outstanding */ r = request_irq(parent_irq, octeon_irq_cib_handler, IRQF_NO_THREAD, "cib", cib_domain); if (r) { pr_err("request_irq cib failed %d\n", r); return r; } pr_info("CIB interrupt controller probed: %llx %d\n", host_data->raw_reg, host_data->max_bits); return 0; } int octeon_irq_ciu3_xlat(struct irq_domain *d, struct device_node *node, const u32 *intspec, unsigned int intsize, unsigned long *out_hwirq, unsigned int *out_type) { struct octeon_ciu3_info *ciu3_info = d->host_data; unsigned int hwirq, type, intsn_major; union cvmx_ciu3_iscx_ctl isc; if (intsize < 2) return -EINVAL; hwirq = intspec[0]; type = intspec[1]; if (hwirq >= (1 << 20)) return -EINVAL; intsn_major = hwirq >> 12; switch (intsn_major) { case 0x04: /* Software handled separately. */ return -EINVAL; default: break; } isc.u64 = cvmx_read_csr(ciu3_info->ciu3_addr + CIU3_ISC_CTL(hwirq)); if (!isc.s.imp) return -EINVAL; switch (type) { case 4: /* official value for level triggering. */ *out_type = IRQ_TYPE_LEVEL_HIGH; break; case 0: /* unofficial value, but we might as well let it work. */ case 1: /* official value for edge triggering. */ *out_type = IRQ_TYPE_EDGE_RISING; break; default: /* Nothing else is acceptable. */ return -EINVAL; } *out_hwirq = hwirq; return 0; } void octeon_irq_ciu3_enable(struct irq_data *data) { int cpu; union cvmx_ciu3_iscx_ctl isc_ctl; union cvmx_ciu3_iscx_w1c isc_w1c; u64 isc_ctl_addr; struct octeon_ciu_chip_data *cd; cpu = next_cpu_for_irq(data); cd = irq_data_get_irq_chip_data(data); isc_w1c.u64 = 0; isc_w1c.s.en = 1; cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64); isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn); isc_ctl.u64 = 0; isc_ctl.s.en = 1; isc_ctl.s.idt = per_cpu(octeon_irq_ciu3_idt_ip2, cpu); cvmx_write_csr(isc_ctl_addr, isc_ctl.u64); cvmx_read_csr(isc_ctl_addr); } void octeon_irq_ciu3_disable(struct irq_data *data) { u64 isc_ctl_addr; union cvmx_ciu3_iscx_w1c isc_w1c; struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); isc_w1c.u64 = 0; isc_w1c.s.en = 1; isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn); cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64); cvmx_write_csr(isc_ctl_addr, 0); cvmx_read_csr(isc_ctl_addr); } void octeon_irq_ciu3_ack(struct irq_data *data) { u64 isc_w1c_addr; union cvmx_ciu3_iscx_w1c isc_w1c; struct octeon_ciu_chip_data *cd; u32 trigger_type = irqd_get_trigger_type(data); /* * We use a single irq_chip, so we have to do nothing to ack a * level interrupt. */ if (!(trigger_type & IRQ_TYPE_EDGE_BOTH)) return; cd = irq_data_get_irq_chip_data(data); isc_w1c.u64 = 0; isc_w1c.s.raw = 1; isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn); cvmx_write_csr(isc_w1c_addr, isc_w1c.u64); cvmx_read_csr(isc_w1c_addr); } void octeon_irq_ciu3_mask(struct irq_data *data) { union cvmx_ciu3_iscx_w1c isc_w1c; u64 isc_w1c_addr; struct octeon_ciu_chip_data *cd; cd = irq_data_get_irq_chip_data(data); isc_w1c.u64 = 0; isc_w1c.s.en = 1; isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn); cvmx_write_csr(isc_w1c_addr, isc_w1c.u64); cvmx_read_csr(isc_w1c_addr); } void octeon_irq_ciu3_mask_ack(struct irq_data *data) { union cvmx_ciu3_iscx_w1c isc_w1c; u64 isc_w1c_addr; struct octeon_ciu_chip_data *cd; u32 trigger_type = irqd_get_trigger_type(data); cd = irq_data_get_irq_chip_data(data); isc_w1c.u64 = 0; isc_w1c.s.en = 1; /* * We use a single irq_chip, so only ack an edge (!level) * interrupt. */ if (trigger_type & IRQ_TYPE_EDGE_BOTH) isc_w1c.s.raw = 1; isc_w1c_addr = cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn); cvmx_write_csr(isc_w1c_addr, isc_w1c.u64); cvmx_read_csr(isc_w1c_addr); } #ifdef CONFIG_SMP static int octeon_irq_ciu3_set_affinity(struct irq_data *data, const struct cpumask *dest, bool force) { union cvmx_ciu3_iscx_ctl isc_ctl; union cvmx_ciu3_iscx_w1c isc_w1c; u64 isc_ctl_addr; int cpu; bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data); struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data); if (!cpumask_subset(dest, cpumask_of_node(cd->ciu_node))) return -EINVAL; if (!enable_one) return IRQ_SET_MASK_OK; cd = irq_data_get_irq_chip_data(data); cpu = cpumask_first(dest); if (cpu >= nr_cpu_ids) cpu = smp_processor_id(); cd->current_cpu = cpu; isc_w1c.u64 = 0; isc_w1c.s.en = 1; cvmx_write_csr(cd->ciu3_addr + CIU3_ISC_W1C(cd->intsn), isc_w1c.u64); isc_ctl_addr = cd->ciu3_addr + CIU3_ISC_CTL(cd->intsn); isc_ctl.u64 = 0; isc_ctl.s.en = 1; isc_ctl.s.idt = per_cpu(octeon_irq_ciu3_idt_ip2, cpu); cvmx_write_csr(isc_ctl_addr, isc_ctl.u64); cvmx_read_csr(isc_ctl_addr); return IRQ_SET_MASK_OK; } #endif static struct irq_chip octeon_irq_chip_ciu3 = { .name = "CIU3", .irq_startup = edge_startup, .irq_enable = octeon_irq_ciu3_enable, .irq_disable = octeon_irq_ciu3_disable, .irq_ack = octeon_irq_ciu3_ack, .irq_mask = octeon_irq_ciu3_mask, .irq_mask_ack = octeon_irq_ciu3_mask_ack, .irq_unmask = octeon_irq_ciu3_enable, .irq_set_type = octeon_irq_ciu_set_type, #ifdef CONFIG_SMP .irq_set_affinity = octeon_irq_ciu3_set_affinity, .irq_cpu_offline = octeon_irq_cpu_offline_ciu, #endif }; int octeon_irq_ciu3_mapx(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw, struct irq_chip *chip) { struct octeon_ciu3_info *ciu3_info = d->host_data; struct octeon_ciu_chip_data *cd = kzalloc_node(sizeof(*cd), GFP_KERNEL, ciu3_info->node); if (!cd) return -ENOMEM; cd->intsn = hw; cd->current_cpu = -1; cd->ciu3_addr = ciu3_info->ciu3_addr; cd->ciu_node = ciu3_info->node; irq_set_chip_and_handler(virq, chip, handle_edge_irq); irq_set_chip_data(virq, cd); return 0; } static int octeon_irq_ciu3_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw) { return octeon_irq_ciu3_mapx(d, virq, hw, &octeon_irq_chip_ciu3); } static struct irq_domain_ops octeon_dflt_domain_ciu3_ops = { .map = octeon_irq_ciu3_map, .unmap = octeon_irq_free_cd, .xlate = octeon_irq_ciu3_xlat, }; static void octeon_irq_ciu3_ip2(void) { union cvmx_ciu3_destx_pp_int dest_pp_int; struct octeon_ciu3_info *ciu3_info; u64 ciu3_addr; ciu3_info = __this_cpu_read(octeon_ciu3_info); ciu3_addr = ciu3_info->ciu3_addr; dest_pp_int.u64 = cvmx_read_csr(ciu3_addr + CIU3_DEST_PP_INT(3 * cvmx_get_local_core_num())); if (likely(dest_pp_int.s.intr)) { irq_hw_number_t intsn = dest_pp_int.s.intsn; irq_hw_number_t hw; struct irq_domain *domain; /* Get the domain to use from the major block */ int block = intsn >> 12; int ret; domain = ciu3_info->domain[block]; if (ciu3_info->intsn2hw[block]) hw = ciu3_info->intsn2hw[block](domain, intsn); else hw = intsn; ret = handle_domain_irq(domain, hw, NULL); if (ret < 0) { union cvmx_ciu3_iscx_w1c isc_w1c; u64 isc_w1c_addr = ciu3_addr + CIU3_ISC_W1C(intsn); isc_w1c.u64 = 0; isc_w1c.s.en = 1; cvmx_write_csr(isc_w1c_addr, isc_w1c.u64); cvmx_read_csr(isc_w1c_addr); spurious_interrupt(); } } else { spurious_interrupt(); } } /* * 10 mbox per core starting from zero. * Base mbox is core * 10 */ static unsigned int octeon_irq_ciu3_base_mbox_intsn(int core) { /* SW (mbox) are 0x04 in bits 12..19 */ return 0x04000 + CIU3_MBOX_PER_CORE * core; } static unsigned int octeon_irq_ciu3_mbox_intsn_for_core(int core, unsigned int mbox) { return octeon_irq_ciu3_base_mbox_intsn(core) + mbox; } static unsigned int octeon_irq_ciu3_mbox_intsn_for_cpu(int cpu, unsigned int mbox) { int local_core = octeon_coreid_for_cpu(cpu) & 0x3f; return octeon_irq_ciu3_mbox_intsn_for_core(local_core, mbox); } static void octeon_irq_ciu3_mbox(void) { union cvmx_ciu3_destx_pp_int dest_pp_int; struct octeon_ciu3_info *ciu3_info; u64 ciu3_addr; int core = cvmx_get_local_core_num(); ciu3_info = __this_cpu_read(octeon_ciu3_info); ciu3_addr = ciu3_info->ciu3_addr; dest_pp_int.u64 = cvmx_read_csr(ciu3_addr + CIU3_DEST_PP_INT(1 + 3 * core)); if (likely(dest_pp_int.s.intr)) { irq_hw_number_t intsn = dest_pp_int.s.intsn; int mbox = intsn - octeon_irq_ciu3_base_mbox_intsn(core); if (likely(mbox >= 0 && mbox < CIU3_MBOX_PER_CORE)) { do_IRQ(mbox + OCTEON_IRQ_MBOX0); } else { union cvmx_ciu3_iscx_w1c isc_w1c; u64 isc_w1c_addr = ciu3_addr + CIU3_ISC_W1C(intsn); isc_w1c.u64 = 0; isc_w1c.s.en = 1; cvmx_write_csr(isc_w1c_addr, isc_w1c.u64); cvmx_read_csr(isc_w1c_addr); spurious_interrupt(); } } else { spurious_interrupt(); } } void octeon_ciu3_mbox_send(int cpu, unsigned int mbox) { struct octeon_ciu3_info *ciu3_info; unsigned int intsn; union cvmx_ciu3_iscx_w1s isc_w1s; u64 isc_w1s_addr; if (WARN_ON_ONCE(mbox >= CIU3_MBOX_PER_CORE)) return; intsn = octeon_irq_ciu3_mbox_intsn_for_cpu(cpu, mbox); ciu3_info = per_cpu(octeon_ciu3_info, cpu); isc_w1s_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1S(intsn); isc_w1s.u64 = 0; isc_w1s.s.raw = 1; cvmx_write_csr(isc_w1s_addr, isc_w1s.u64); cvmx_read_csr(isc_w1s_addr); } static void octeon_irq_ciu3_mbox_set_enable(struct irq_data *data, int cpu, bool en) { struct octeon_ciu3_info *ciu3_info; unsigned int intsn; u64 isc_ctl_addr, isc_w1c_addr; union cvmx_ciu3_iscx_ctl isc_ctl; unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0; intsn = octeon_irq_ciu3_mbox_intsn_for_cpu(cpu, mbox); ciu3_info = per_cpu(octeon_ciu3_info, cpu); isc_w1c_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1C(intsn); isc_ctl_addr = ciu3_info->ciu3_addr + CIU3_ISC_CTL(intsn); isc_ctl.u64 = 0; isc_ctl.s.en = 1; cvmx_write_csr(isc_w1c_addr, isc_ctl.u64); cvmx_write_csr(isc_ctl_addr, 0); if (en) { unsigned int idt = per_cpu(octeon_irq_ciu3_idt_ip3, cpu); isc_ctl.u64 = 0; isc_ctl.s.en = 1; isc_ctl.s.idt = idt; cvmx_write_csr(isc_ctl_addr, isc_ctl.u64); } cvmx_read_csr(isc_ctl_addr); } static void octeon_irq_ciu3_mbox_enable(struct irq_data *data) { int cpu; unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0; WARN_ON(mbox >= CIU3_MBOX_PER_CORE); for_each_online_cpu(cpu) octeon_irq_ciu3_mbox_set_enable(data, cpu, true); } static void octeon_irq_ciu3_mbox_disable(struct irq_data *data) { int cpu; unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0; WARN_ON(mbox >= CIU3_MBOX_PER_CORE); for_each_online_cpu(cpu) octeon_irq_ciu3_mbox_set_enable(data, cpu, false); } static void octeon_irq_ciu3_mbox_ack(struct irq_data *data) { struct octeon_ciu3_info *ciu3_info; unsigned int intsn; u64 isc_w1c_addr; union cvmx_ciu3_iscx_w1c isc_w1c; unsigned int mbox = data->irq - OCTEON_IRQ_MBOX0; intsn = octeon_irq_ciu3_mbox_intsn_for_core(cvmx_get_local_core_num(), mbox); isc_w1c.u64 = 0; isc_w1c.s.raw = 1; ciu3_info = __this_cpu_read(octeon_ciu3_info); isc_w1c_addr = ciu3_info->ciu3_addr + CIU3_ISC_W1C(intsn); cvmx_write_csr(isc_w1c_addr, isc_w1c.u64); cvmx_read_csr(isc_w1c_addr); } static void octeon_irq_ciu3_mbox_cpu_online(struct irq_data *data) { octeon_irq_ciu3_mbox_set_enable(data, smp_processor_id(), true); } static void octeon_irq_ciu3_mbox_cpu_offline(struct irq_data *data) { octeon_irq_ciu3_mbox_set_enable(data, smp_processor_id(), false); } static int octeon_irq_ciu3_alloc_resources(struct octeon_ciu3_info *ciu3_info) { u64 b = ciu3_info->ciu3_addr; int idt_ip2, idt_ip3, idt_ip4; int unused_idt2; int core = cvmx_get_local_core_num(); int i; __this_cpu_write(octeon_ciu3_info, ciu3_info); /* * 4 idt per core starting from 1 because zero is reserved. * Base idt per core is 4 * core + 1 */ idt_ip2 = core * 4 + 1; idt_ip3 = core * 4 + 2; idt_ip4 = core * 4 + 3; unused_idt2 = core * 4 + 4; __this_cpu_write(octeon_irq_ciu3_idt_ip2, idt_ip2); __this_cpu_write(octeon_irq_ciu3_idt_ip3, idt_ip3); /* ip2 interrupts for this CPU */ cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip2), 0); cvmx_write_csr(b + CIU3_IDT_PP(idt_ip2, 0), 1ull << core); cvmx_write_csr(b + CIU3_IDT_IO(idt_ip2), 0); /* ip3 interrupts for this CPU */ cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip3), 1); cvmx_write_csr(b + CIU3_IDT_PP(idt_ip3, 0), 1ull << core); cvmx_write_csr(b + CIU3_IDT_IO(idt_ip3), 0); /* ip4 interrupts for this CPU */ cvmx_write_csr(b + CIU3_IDT_CTL(idt_ip4), 2); cvmx_write_csr(b + CIU3_IDT_PP(idt_ip4, 0), 0); cvmx_write_csr(b + CIU3_IDT_IO(idt_ip4), 0); cvmx_write_csr(b + CIU3_IDT_CTL(unused_idt2), 0); cvmx_write_csr(b + CIU3_IDT_PP(unused_idt2, 0), 0); cvmx_write_csr(b + CIU3_IDT_IO(unused_idt2), 0); for (i = 0; i < CIU3_MBOX_PER_CORE; i++) { unsigned int intsn = octeon_irq_ciu3_mbox_intsn_for_core(core, i); cvmx_write_csr(b + CIU3_ISC_W1C(intsn), 2); cvmx_write_csr(b + CIU3_ISC_CTL(intsn), 0); } return 0; } static void octeon_irq_setup_secondary_ciu3(void) { struct octeon_ciu3_info *ciu3_info; ciu3_info = octeon_ciu3_info_per_node[cvmx_get_node_num()]; octeon_irq_ciu3_alloc_resources(ciu3_info); irq_cpu_online(); /* Enable the CIU lines */ set_c0_status(STATUSF_IP3 | STATUSF_IP2); if (octeon_irq_use_ip4) set_c0_status(STATUSF_IP4); else clear_c0_status(STATUSF_IP4); } static struct irq_chip octeon_irq_chip_ciu3_mbox = { .name = "CIU3-M", .irq_enable = octeon_irq_ciu3_mbox_enable, .irq_disable = octeon_irq_ciu3_mbox_disable, .irq_ack = octeon_irq_ciu3_mbox_ack, .irq_cpu_online = octeon_irq_ciu3_mbox_cpu_online, .irq_cpu_offline = octeon_irq_ciu3_mbox_cpu_offline, .flags = IRQCHIP_ONOFFLINE_ENABLED, }; static int __init octeon_irq_init_ciu3(struct device_node *ciu_node, struct device_node *parent) { int i; int node; struct irq_domain *domain; struct octeon_ciu3_info *ciu3_info; const __be32 *zero_addr; u64 base_addr; union cvmx_ciu3_const consts; node = 0; /* of_node_to_nid(ciu_node); */ ciu3_info = kzalloc_node(sizeof(*ciu3_info), GFP_KERNEL, node); if (!ciu3_info) return -ENOMEM; zero_addr = of_get_address(ciu_node, 0, NULL, NULL); if (WARN_ON(!zero_addr)) return -EINVAL; base_addr = of_translate_address(ciu_node, zero_addr); base_addr = (u64)phys_to_virt(base_addr); ciu3_info->ciu3_addr = base_addr; ciu3_info->node = node; consts.u64 = cvmx_read_csr(base_addr + CIU3_CONST); octeon_irq_setup_secondary = octeon_irq_setup_secondary_ciu3; octeon_irq_ip2 = octeon_irq_ciu3_ip2; octeon_irq_ip3 = octeon_irq_ciu3_mbox; octeon_irq_ip4 = octeon_irq_ip4_mask; if (node == cvmx_get_node_num()) { /* Mips internal */ octeon_irq_init_core(); /* Only do per CPU things if it is the CIU of the boot node. */ i = irq_alloc_descs_from(OCTEON_IRQ_MBOX0, 8, node); WARN_ON(i < 0); for (i = 0; i < 8; i++) irq_set_chip_and_handler(i + OCTEON_IRQ_MBOX0, &octeon_irq_chip_ciu3_mbox, handle_percpu_irq); } /* * Initialize all domains to use the default domain. Specific major * blocks will overwrite the default domain as needed. */ domain = irq_domain_add_tree(ciu_node, &octeon_dflt_domain_ciu3_ops, ciu3_info); for (i = 0; i < MAX_CIU3_DOMAINS; i++) ciu3_info->domain[i] = domain; octeon_ciu3_info_per_node[node] = ciu3_info; if (node == cvmx_get_node_num()) { /* Only do per CPU things if it is the CIU of the boot node. */ octeon_irq_ciu3_alloc_resources(ciu3_info); if (node == 0) irq_set_default_host(domain); octeon_irq_use_ip4 = false; /* Enable the CIU lines */ set_c0_status(STATUSF_IP2 | STATUSF_IP3); clear_c0_status(STATUSF_IP4); } return 0; } static struct of_device_id ciu_types[] __initdata = { {.compatible = "cavium,octeon-3860-ciu", .data = octeon_irq_init_ciu}, {.compatible = "cavium,octeon-3860-gpio", .data = octeon_irq_init_gpio}, {.compatible = "cavium,octeon-6880-ciu2", .data = octeon_irq_init_ciu2}, {.compatible = "cavium,octeon-7890-ciu3", .data = octeon_irq_init_ciu3}, {.compatible = "cavium,octeon-7130-cib", .data = octeon_irq_init_cib}, {} }; void __init arch_init_irq(void) { #ifdef CONFIG_SMP /* Set the default affinity to the boot cpu. */ cpumask_clear(irq_default_affinity); cpumask_set_cpu(smp_processor_id(), irq_default_affinity); #endif of_irq_init(ciu_types); } asmlinkage void plat_irq_dispatch(void) { unsigned long cop0_cause; unsigned long cop0_status; while (1) { cop0_cause = read_c0_cause(); cop0_status = read_c0_status(); cop0_cause &= cop0_status; cop0_cause &= ST0_IM; if (cop0_cause & STATUSF_IP2) octeon_irq_ip2(); else if (cop0_cause & STATUSF_IP3) octeon_irq_ip3(); else if (cop0_cause & STATUSF_IP4) octeon_irq_ip4(); else if (cop0_cause) do_IRQ(fls(cop0_cause) - 9 + MIPS_CPU_IRQ_BASE); else break; } } #ifdef CONFIG_HOTPLUG_CPU void octeon_fixup_irqs(void) { irq_cpu_offline(); } #endif /* CONFIG_HOTPLUG_CPU */ struct irq_domain *octeon_irq_get_block_domain(int node, uint8_t block) { struct octeon_ciu3_info *ciu3_info; ciu3_info = octeon_ciu3_info_per_node[node & CVMX_NODE_MASK]; return ciu3_info->domain[block]; } EXPORT_SYMBOL(octeon_irq_get_block_domain);
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