diff options
author | David Daney <david.daney@cavium.com> | 2015-01-15 16:11:19 +0300 |
---|---|---|
committer | Ralf Baechle <ralf@linux-mips.org> | 2015-02-20 15:33:40 +0100 |
commit | 64b139f97c01f3624b3f0a4e84f65b0c2bf2ebda (patch) | |
tree | 3f2fd25e07ed95a6f9e165944f08079e69f63fa1 /arch/mips | |
parent | 2e3ecab1d373846d68c310065aab2365d0da3a75 (diff) |
MIPS: OCTEON: irq: add CIB and other fixes
- Use of_irq_init() to initialize interrupt controllers
- Get rid of some unlikely()
- Add CIB to support SATA and other interrupts
- Add support for CIU SUM2 interrupt sources
Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Leonid Rosenboim <lrosenboim@caviumnetworks.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Signed-off-by: Peter Swain <peter.swain@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8947/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
-rw-r--r-- | arch/mips/cavium-octeon/octeon-irq.c | 1049 |
1 files changed, 780 insertions, 269 deletions
diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c index 1b25998fe1ea..10f762557b92 100644 --- a/arch/mips/cavium-octeon/octeon-irq.c +++ b/arch/mips/cavium-octeon/octeon-irq.c @@ -3,12 +3,14 @@ * License. See the file "COPYING" in the main directory of this archive * for more details. * - * Copyright (C) 2004-2012 Cavium, Inc. + * Copyright (C) 2004-2014 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> @@ -22,16 +24,25 @@ 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); +struct octeon_irq_ciu_domain_data { + int num_sum; /* number of sum registers (2 or 3). */ +}; + static __read_mostly u8 octeon_irq_ciu_to_irq[8][64]; -union octeon_ciu_chip_data { - void *p; - unsigned long l; - struct { - unsigned long line:6; - unsigned long bit:6; - unsigned long gpio_line:6; - } s; +struct octeon_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; + u8 gpio_line; + }; + }; + int current_cpu; /* Next CPU expected to take this irq */ }; struct octeon_core_chip_data { @@ -45,27 +56,40 @@ struct octeon_core_chip_data { static struct octeon_core_chip_data octeon_irq_core_chip_data[MIPS_CORE_IRQ_LINES]; -static void octeon_irq_set_ciu_mapping(int irq, int line, int bit, int gpio_line, - struct irq_chip *chip, - irq_flow_handler_t handler) +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) { - union octeon_ciu_chip_data cd; + 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.l = 0; - cd.s.line = line; - cd.s.bit = bit; - cd.s.gpio_line = gpio_line; + cd->line = line; + cd->bit = bit; + cd->gpio_line = gpio_line; - irq_set_chip_data(irq, cd.p); + 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 void octeon_irq_force_ciu_mapping(struct irq_domain *domain, - int irq, int line, int bit) +static int octeon_irq_force_ciu_mapping(struct irq_domain *domain, + int irq, int line, int bit) { - irq_domain_associate(domain, irq, line << 6 | bit); + return irq_domain_associate(domain, irq, line << 6 | bit); } static int octeon_coreid_for_cpu(int cpu) @@ -202,9 +226,10 @@ static int next_cpu_for_irq(struct irq_data *data) #ifdef CONFIG_SMP int cpu; int weight = cpumask_weight(data->affinity); + struct octeon_ciu_chip_data *cd = irq_data_get_irq_chip_data(data); if (weight > 1) { - cpu = smp_processor_id(); + cpu = cd->current_cpu; for (;;) { cpu = cpumask_next(cpu, data->affinity); if (cpu >= nr_cpu_ids) { @@ -219,6 +244,7 @@ static int next_cpu_for_irq(struct irq_data *data) } else { cpu = smp_processor_id(); } + cd->current_cpu = cpu; return cpu; #else return smp_processor_id(); @@ -231,15 +257,15 @@ static void octeon_irq_ciu_enable(struct irq_data *data) int coreid = octeon_coreid_for_cpu(cpu); unsigned long *pen; unsigned long flags; - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; raw_spinlock_t *lock = &per_cpu(octeon_irq_ciu_spinlock, cpu); - cd.p = irq_data_get_irq_chip_data(data); + cd = irq_data_get_irq_chip_data(data); raw_spin_lock_irqsave(lock, flags); - if (cd.s.line == 0) { + if (cd->line == 0) { pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu); - __set_bit(cd.s.bit, pen); + __set_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. @@ -248,7 +274,7 @@ static void octeon_irq_ciu_enable(struct irq_data *data) cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), *pen); } else { pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu); - __set_bit(cd.s.bit, pen); + __set_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. @@ -263,15 +289,15 @@ static void octeon_irq_ciu_enable_local(struct irq_data *data) { unsigned long *pen; unsigned long flags; - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; raw_spinlock_t *lock = this_cpu_ptr(&octeon_irq_ciu_spinlock); - cd.p = irq_data_get_irq_chip_data(data); + cd = irq_data_get_irq_chip_data(data); raw_spin_lock_irqsave(lock, flags); - if (cd.s.line == 0) { + if (cd->line == 0) { pen = this_cpu_ptr(&octeon_irq_ciu0_en_mirror); - __set_bit(cd.s.bit, pen); + __set_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. @@ -280,7 +306,7 @@ static void octeon_irq_ciu_enable_local(struct irq_data *data) 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.s.bit, pen); + __set_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. @@ -295,15 +321,15 @@ static void octeon_irq_ciu_disable_local(struct irq_data *data) { unsigned long *pen; unsigned long flags; - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; raw_spinlock_t *lock = this_cpu_ptr(&octeon_irq_ciu_spinlock); - cd.p = irq_data_get_irq_chip_data(data); + cd = irq_data_get_irq_chip_data(data); raw_spin_lock_irqsave(lock, flags); - if (cd.s.line == 0) { + if (cd->line == 0) { pen = this_cpu_ptr(&octeon_irq_ciu0_en_mirror); - __clear_bit(cd.s.bit, pen); + __clear_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. @@ -312,7 +338,7 @@ static void octeon_irq_ciu_disable_local(struct irq_data *data) 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.s.bit, pen); + __clear_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. @@ -328,27 +354,27 @@ static void octeon_irq_ciu_disable_all(struct irq_data *data) unsigned long flags; unsigned long *pen; int cpu; - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; raw_spinlock_t *lock; - cd.p = irq_data_get_irq_chip_data(data); + 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.s.line == 0) + 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.s.bit, pen); + __clear_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. */ wmb(); - if (cd.s.line == 0) + 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); @@ -361,27 +387,27 @@ static void octeon_irq_ciu_enable_all(struct irq_data *data) unsigned long flags; unsigned long *pen; int cpu; - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; raw_spinlock_t *lock; - cd.p = irq_data_get_irq_chip_data(data); + 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.s.line == 0) + 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.s.bit, pen); + __set_bit(cd->bit, pen); /* * Must be visible to octeon_irq_ip{2,3}_ciu() before * enabling the irq. */ wmb(); - if (cd.s.line == 0) + 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); @@ -397,45 +423,106 @@ static void octeon_irq_ciu_enable_v2(struct irq_data *data) { u64 mask; int cpu = next_cpu_for_irq(data); - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; - cd.p = irq_data_get_irq_chip_data(data); - mask = 1ull << (cd.s.bit); + 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.s.line == 0) { + if (cd->line == 0) { int index = octeon_coreid_for_cpu(cpu) * 2; - set_bit(cd.s.bit, &per_cpu(octeon_irq_ciu0_en_mirror, cpu)); + 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.s.bit, &per_cpu(octeon_irq_ciu1_en_mirror, cpu)); + 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; - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; - cd.p = irq_data_get_irq_chip_data(data); - mask = 1ull << (cd.s.bit); + cd = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd->bit); - if (cd.s.line == 0) { + if (cd->line == 0) { int index = cvmx_get_core_num() * 2; - set_bit(cd.s.bit, this_cpu_ptr(&octeon_irq_ciu0_en_mirror)); + 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.s.bit, this_cpu_ptr(&octeon_irq_ciu1_en_mirror)); + set_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu1_en_mirror)); cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask); } } @@ -443,18 +530,18 @@ static void octeon_irq_ciu_enable_local_v2(struct irq_data *data) static void octeon_irq_ciu_disable_local_v2(struct irq_data *data) { u64 mask; - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; - cd.p = irq_data_get_irq_chip_data(data); - mask = 1ull << (cd.s.bit); + cd = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd->bit); - if (cd.s.line == 0) { + if (cd->line == 0) { int index = cvmx_get_core_num() * 2; - clear_bit(cd.s.bit, this_cpu_ptr(&octeon_irq_ciu0_en_mirror)); + 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.s.bit, this_cpu_ptr(&octeon_irq_ciu1_en_mirror)); + clear_bit(cd->bit, this_cpu_ptr(&octeon_irq_ciu1_en_mirror)); cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask); } } @@ -465,12 +552,12 @@ static void octeon_irq_ciu_disable_local_v2(struct irq_data *data) static void octeon_irq_ciu_ack(struct irq_data *data) { u64 mask; - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; - cd.p = irq_data_get_irq_chip_data(data); - mask = 1ull << (cd.s.bit); + cd = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd->bit); - if (cd.s.line == 0) { + if (cd->line == 0) { int index = cvmx_get_core_num() * 2; cvmx_write_csr(CVMX_CIU_INTX_SUM0(index), mask); } else { @@ -486,21 +573,23 @@ static void octeon_irq_ciu_disable_all_v2(struct irq_data *data) { int cpu; u64 mask; - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; - cd.p = irq_data_get_irq_chip_data(data); - mask = 1ull << (cd.s.bit); + cd = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd->bit); - if (cd.s.line == 0) { + if (cd->line == 0) { for_each_online_cpu(cpu) { int index = octeon_coreid_for_cpu(cpu) * 2; - clear_bit(cd.s.bit, &per_cpu(octeon_irq_ciu0_en_mirror, cpu)); + 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.s.bit, &per_cpu(octeon_irq_ciu1_en_mirror, cpu)); + clear_bit(cd->bit, + &per_cpu(octeon_irq_ciu1_en_mirror, cpu)); cvmx_write_csr(CVMX_CIU_INTX_EN1_W1C(index), mask); } } @@ -514,21 +603,23 @@ static void octeon_irq_ciu_enable_all_v2(struct irq_data *data) { int cpu; u64 mask; - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; - cd.p = irq_data_get_irq_chip_data(data); - mask = 1ull << (cd.s.bit); + cd = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd->bit); - if (cd.s.line == 0) { + if (cd->line == 0) { for_each_online_cpu(cpu) { int index = octeon_coreid_for_cpu(cpu) * 2; - set_bit(cd.s.bit, &per_cpu(octeon_irq_ciu0_en_mirror, cpu)); + 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.s.bit, &per_cpu(octeon_irq_ciu1_en_mirror, cpu)); + set_bit(cd->bit, + &per_cpu(octeon_irq_ciu1_en_mirror, cpu)); cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask); } } @@ -537,10 +628,10 @@ static void octeon_irq_ciu_enable_all_v2(struct irq_data *data) static void octeon_irq_gpio_setup(struct irq_data *data) { union cvmx_gpio_bit_cfgx cfg; - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; u32 t = irqd_get_trigger_type(data); - cd.p = irq_data_get_irq_chip_data(data); + cd = irq_data_get_irq_chip_data(data); cfg.u64 = 0; cfg.s.int_en = 1; @@ -551,7 +642,7 @@ static void octeon_irq_gpio_setup(struct irq_data *data) cfg.s.fil_cnt = 7; cfg.s.fil_sel = 3; - cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd.s.gpio_line), cfg.u64); + cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd->gpio_line), cfg.u64); } static void octeon_irq_ciu_enable_gpio_v2(struct irq_data *data) @@ -576,36 +667,36 @@ static int octeon_irq_ciu_gpio_set_type(struct irq_data *data, unsigned int t) static void octeon_irq_ciu_disable_gpio_v2(struct irq_data *data) { - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; - cd.p = irq_data_get_irq_chip_data(data); - cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd.s.gpio_line), 0); + 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) { - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; - cd.p = irq_data_get_irq_chip_data(data); - cvmx_write_csr(CVMX_GPIO_BIT_CFGX(cd.s.gpio_line), 0); + 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) { - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; u64 mask; - cd.p = irq_data_get_irq_chip_data(data); - mask = 1ull << (cd.s.gpio_line); + cd = irq_data_get_irq_chip_data(data); + mask = 1ull << (cd->gpio_line); cvmx_write_csr(CVMX_GPIO_INT_CLR, mask); } -static void octeon_irq_handle_gpio(unsigned int irq, struct irq_desc *desc) +static void octeon_irq_handle_trigger(unsigned int irq, struct irq_desc *desc) { if (irq_get_trigger_type(irq) & IRQ_TYPE_EDGE_BOTH) handle_edge_irq(irq, desc); @@ -644,11 +735,11 @@ static int octeon_irq_ciu_set_affinity(struct irq_data *data, int cpu; bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data); unsigned long flags; - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; unsigned long *pen; raw_spinlock_t *lock; - cd.p = irq_data_get_irq_chip_data(data); + cd = irq_data_get_irq_chip_data(data); /* * For non-v2 CIU, we will allow only single CPU affinity. @@ -668,16 +759,16 @@ static int octeon_irq_ciu_set_affinity(struct irq_data *data, lock = &per_cpu(octeon_irq_ciu_spinlock, cpu); raw_spin_lock_irqsave(lock, flags); - if (cd.s.line == 0) + if (cd->line == 0) pen = &per_cpu(octeon_irq_ciu0_en_mirror, cpu); else pen = &per_cpu(octeon_irq_ciu1_en_mirror, cpu); if (cpumask_test_cpu(cpu, dest) && enable_one) { enable_one = 0; - __set_bit(cd.s.bit, pen); + __set_bit(cd->bit, pen); } else { - __clear_bit(cd.s.bit, pen); + __clear_bit(cd->bit, pen); } /* * Must be visible to octeon_irq_ip{2,3}_ciu() before @@ -685,7 +776,7 @@ static int octeon_irq_ciu_set_affinity(struct irq_data *data, */ wmb(); - if (cd.s.line == 0) + 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); @@ -706,24 +797,24 @@ static int octeon_irq_ciu_set_affinity_v2(struct irq_data *data, int cpu; bool enable_one = !irqd_irq_disabled(data) && !irqd_irq_masked(data); u64 mask; - union octeon_ciu_chip_data cd; + struct octeon_ciu_chip_data *cd; if (!enable_one) return 0; - cd.p = irq_data_get_irq_chip_data(data); - mask = 1ull << cd.s.bit; + cd = irq_data_get_irq_chip_data(data); + mask = 1ull << cd->bit; - if (cd.s.line == 0) { + 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.s.bit, pen); + set_bit(cd->bit, pen); cvmx_write_csr(CVMX_CIU_INTX_EN0_W1S(index), mask); } else { - clear_bit(cd.s.bit, pen); + clear_bit(cd->bit, pen); cvmx_write_csr(CVMX_CIU_INTX_EN0_W1C(index), mask); } } @@ -733,16 +824,44 @@ static int octeon_irq_ciu_set_affinity_v2(struct irq_data *data, int index = octeon_coreid_for_cpu(cpu) * 2 + 1; if (cpumask_test_cpu(cpu, dest) && enable_one) { enable_one = false; - set_bit(cd.s.bit, pen); + set_bit(cd->bit, pen); cvmx_write_csr(CVMX_CIU_INTX_EN1_W1S(index), mask); } else { - clear_bit(cd.s.bit, pen); + 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 /* @@ -773,6 +892,34 @@ static struct irq_chip octeon_irq_chip_ciu_v2_edge = { #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, @@ -994,11 +1141,12 @@ static int octeon_irq_ciu_xlat(struct irq_domain *d, 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 > 1 || bit > 63) + if (ciu >= dd->num_sum || bit > 63) return -EINVAL; *out_hwirq = (ciu << 6) | bit; @@ -1024,8 +1172,10 @@ static bool octeon_irq_virq_in_range(unsigned int virq) static int octeon_irq_ciu_map(struct irq_domain *d, unsigned int virq, irq_hw_number_t hw) { + int rv; unsigned int line = hw >> 6; unsigned int bit = hw & 63; + struct octeon_irq_ciu_domain_data *dd = d->host_data; if (!octeon_irq_virq_in_range(virq)) return -EINVAL; @@ -1034,54 +1184,61 @@ static int octeon_irq_ciu_map(struct irq_domain *d, if (line == 0 && bit >= 16 && bit <32) return 0; - if (line > 1 || octeon_irq_ciu_to_irq[line][bit] != 0) + if (line >= dd->num_sum || octeon_irq_ciu_to_irq[line][bit] != 0) return -EINVAL; - if (octeon_irq_ciu_is_edge(line, bit)) - octeon_irq_set_ciu_mapping(virq, line, bit, 0, - octeon_irq_ciu_chip_edge, - handle_edge_irq); - else - octeon_irq_set_ciu_mapping(virq, line, bit, 0, - octeon_irq_ciu_chip, - handle_level_irq); - - return 0; + 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_common(struct irq_domain *d, - unsigned int virq, irq_hw_number_t hw, - int line_limit, struct irq_chip *chip) +static int octeon_irq_gpio_map(struct irq_domain *d, + unsigned int virq, irq_hw_number_t hw) { struct octeon_irq_gpio_domain_data *gpiod = d->host_data; unsigned int line, bit; + int r; if (!octeon_irq_virq_in_range(virq)) return -EINVAL; line = (hw + gpiod->base_hwirq) >> 6; bit = (hw + gpiod->base_hwirq) & 63; - if (line > line_limit || octeon_irq_ciu_to_irq[line][bit] != 0) + if (line > ARRAY_SIZE(octeon_irq_ciu_to_irq) || + octeon_irq_ciu_to_irq[line][bit] != 0) return -EINVAL; - octeon_irq_set_ciu_mapping(virq, line, bit, hw, - chip, octeon_irq_handle_gpio); - return 0; -} - -static int octeon_irq_gpio_map(struct irq_domain *d, - unsigned int virq, irq_hw_number_t hw) -{ - return octeon_irq_gpio_map_common(d, virq, hw, 1, octeon_irq_gpio_chip); + r = octeon_irq_set_ciu_mapping(virq, line, bit, hw, + octeon_irq_gpio_chip, octeon_irq_handle_trigger); + return r; } static struct irq_domain_ops octeon_irq_domain_ciu_ops = { .map = octeon_irq_ciu_map, + .unmap = octeon_irq_free_cd, .xlate = octeon_irq_ciu_xlat, }; static struct irq_domain_ops octeon_irq_domain_gpio_ops = { .map = octeon_irq_gpio_map, + .unmap = octeon_irq_free_cd, .xlate = octeon_irq_gpio_xlat, }; @@ -1120,6 +1277,26 @@ static void octeon_irq_ip3_ciu(void) } } +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) @@ -1201,7 +1378,10 @@ static void octeon_irq_setup_secondary_ciu(void) /* Enable the CIU lines */ set_c0_status(STATUSF_IP3 | STATUSF_IP2); - clear_c0_status(STATUSF_IP4); + if (octeon_irq_use_ip4) + set_c0_status(STATUSF_IP4); + else + clear_c0_status(STATUSF_IP4); } static void octeon_irq_setup_secondary_ciu2(void) @@ -1217,22 +1397,36 @@ static void octeon_irq_setup_secondary_ciu2(void) clear_c0_status(STATUSF_IP4); } -static void __init octeon_irq_init_ciu(void) +static int __init octeon_irq_init_ciu( + struct device_node *ciu_node, struct device_node *parent) { - unsigned int i; + unsigned int i, r; struct irq_chip *chip; struct irq_chip *chip_edge; struct irq_chip *chip_mbox; struct irq_chip *chip_wd; - struct device_node *gpio_node; - struct device_node *ciu_node; struct irq_domain *ciu_domain = NULL; + 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) || @@ -1251,65 +1445,146 @@ static void __init octeon_irq_init_ciu(void) } octeon_irq_ciu_chip = chip; octeon_irq_ciu_chip_edge = chip_edge; - octeon_irq_ip4 = octeon_irq_ip4_mask; /* Mips internal */ octeon_irq_init_core(); - gpio_node = of_find_compatible_node(NULL, NULL, "cavium,octeon-3860-gpio"); - if (gpio_node) { - struct octeon_irq_gpio_domain_data *gpiod; - - gpiod = kzalloc(sizeof(*gpiod), GFP_KERNEL); - if (gpiod) { - /* gpio domain host_data is the base hwirq number. */ - gpiod->base_hwirq = 16; - irq_domain_add_linear(gpio_node, 16, &octeon_irq_domain_gpio_ops, gpiod); - of_node_put(gpio_node); - } else - pr_warn("Cannot allocate memory for GPIO irq_domain.\n"); - } else - pr_warn("Cannot find device node for cavium,octeon-3860-gpio.\n"); - - ciu_node = of_find_compatible_node(NULL, NULL, "cavium,octeon-3860-ciu"); - if (ciu_node) { - ciu_domain = irq_domain_add_tree(ciu_node, &octeon_irq_domain_ciu_ops, NULL); - irq_set_default_host(ciu_domain); - of_node_put(ciu_node); - } else - panic("Cannot find device node for cavium,octeon-3860-ciu."); + ciu_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++) - octeon_irq_force_ciu_mapping(ciu_domain, i + OCTEON_IRQ_WORKQ0, 0, i + 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; + } - octeon_irq_set_ciu_mapping(OCTEON_IRQ_MBOX0, 0, 32, 0, chip_mbox, handle_percpu_irq); - octeon_irq_set_ciu_mapping(OCTEON_IRQ_MBOX1, 0, 33, 0, chip_mbox, handle_percpu_irq); + r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI, 0, 45); + if (r) + goto err; - for (i = 0; i < 4; i++) - octeon_irq_force_ciu_mapping(ciu_domain, i + OCTEON_IRQ_PCI_INT0, 0, i + 36); - for (i = 0; i < 4; i++) - octeon_irq_force_ciu_mapping(ciu_domain, i + OCTEON_IRQ_PCI_MSI0, 0, i + 40); + r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_RML, 0, 46); + if (r) + goto err; - octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI, 0, 45); - octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_RML, 0, 46); - for (i = 0; i < 4; i++) - octeon_irq_force_ciu_mapping(ciu_domain, i + OCTEON_IRQ_TIMER0, 0, i + 52); + for (i = 0; i < 4; i++) { + r = octeon_irq_force_ciu_mapping( + ciu_domain, i + OCTEON_IRQ_TIMER0, 0, i + 52); + if (r) + goto err; + } + + r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB0, 0, 56); + if (r) + goto err; - octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB0, 0, 56); - octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_TWSI2, 0, 59); + 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++) - octeon_irq_set_ciu_mapping(i + OCTEON_IRQ_WDOG0, 1, i + 0, 0, chip_wd, handle_level_irq); + 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; + } - octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB1, 1, 17); + r = octeon_irq_force_ciu_mapping(ciu_domain, OCTEON_IRQ_USB1, 1, 17); + if (r) + goto err; /* Enable the CIU lines */ set_c0_status(STATUSF_IP3 | STATUSF_IP2); - clear_c0_status(STATUSF_IP4); + if (octeon_irq_use_ip4) + set_c0_status(STATUSF_IP4); + else + clear_c0_status(STATUSF_IP4); + + return 0; +err: + return r; } +static int __init octeon_irq_init_gpio( + struct device_node *gpio_node, struct device_node *parent) +{ + struct octeon_irq_gpio_domain_data *gpiod; + u32 interrupt_cells; + unsigned int base_hwirq; + int r; + + r = of_property_read_u32(parent, "#interrupt-cells", &interrupt_cells); + if (r) + return r; + + if (interrupt_cells == 1) { + u32 v; + + r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v); + if (r) { + pr_warn("No \"interrupts\" property.\n"); + return r; + } + base_hwirq = v; + } else if (interrupt_cells == 2) { + u32 v0, v1; + + r = of_property_read_u32_index(gpio_node, "interrupts", 0, &v0); + if (r) { + pr_warn("No \"interrupts\" property.\n"); + return r; + } + r = of_property_read_u32_index(gpio_node, "interrupts", 1, &v1); + if (r) { + pr_warn("No \"interrupts\" property.\n"); + return r; + } + base_hwirq = (v0 << 6) | v1; + } else { + pr_warn("Bad \"#interrupt-cells\" property: %u\n", + interrupt_cells); + return -EINVAL; + } + + gpiod = kzalloc(sizeof(*gpiod), GFP_KERNEL); + if (gpiod) { + /* gpio domain host_data is the base hwirq number. */ + gpiod->base_hwirq = base_hwirq; + irq_domain_add_linear( + gpio_node, 16, &octeon_irq_domain_gpio_ops, gpiod); + } else { + pr_warn("Cannot allocate memory for GPIO irq_domain.\n"); + return -ENOMEM; + } + + return 0; +} /* * Watchdog interrupts are special. They are associated with a single * core, so we hardwire the affinity to that core. @@ -1319,12 +1594,13 @@ static void octeon_irq_ciu2_wd_enable(struct irq_data *data) u64 mask; u64 en_addr; int coreid = data->irq - OCTEON_ |