From c98c1822ee13e4501bf48a9e3184fb9a84c149c0 Mon Sep 17 00:00:00 2001 From: Qais Yousef Date: Tue, 8 Dec 2015 13:20:24 +0000 Subject: [PATCH] irqchip/mips-gic: Add device hierarchy domain Now the root gic_irq_domain is split into device and IPI domains. This form provides a better representation of how the root domain is split into 2. One for devices and one for IPIs. Signed-off-by: Qais Yousef Acked-by: Ralf Baechle Cc: Cc: Cc: Cc: Cc: Cc: Qais Yousef Link: http://lkml.kernel.org/r/1449580830-23652-14-git-send-email-qais.yousef@imgtec.com Signed-off-by: Thomas Gleixner --- drivers/irqchip/irq-mips-gic.c | 103 ++++++++++++++++++++++++++------- 1 file changed, 83 insertions(+), 20 deletions(-) diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c index 99f01ca1869a..794fc5949c9f 100644 --- a/drivers/irqchip/irq-mips-gic.c +++ b/drivers/irqchip/irq-mips-gic.c @@ -47,6 +47,7 @@ static void __iomem *gic_base; static struct gic_pcpu_mask pcpu_masks[NR_CPUS]; static DEFINE_SPINLOCK(gic_lock); static struct irq_domain *gic_irq_domain; +static struct irq_domain *gic_dev_domain; static struct irq_domain *gic_ipi_domain; static int gic_shared_intrs; static int gic_vpes; @@ -793,25 +794,6 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int virq, return gic_shared_irq_domain_map(d, virq, hw, 0); } -static int gic_irq_domain_xlate(struct irq_domain *d, struct device_node *ctrlr, - const u32 *intspec, unsigned int intsize, - irq_hw_number_t *out_hwirq, - unsigned int *out_type) -{ - if (intsize != 3) - return -EINVAL; - - if (intspec[0] == GIC_SHARED) - *out_hwirq = GIC_SHARED_TO_HWIRQ(intspec[1]); - else if (intspec[0] == GIC_LOCAL) - *out_hwirq = GIC_LOCAL_TO_HWIRQ(intspec[1]); - else - return -EINVAL; - *out_type = intspec[2] & IRQ_TYPE_SENSE_MASK; - - return 0; -} - static int gic_irq_domain_alloc(struct irq_domain *d, unsigned int virq, unsigned int nr_irqs, void *arg) { @@ -881,11 +863,86 @@ void gic_irq_domain_free(struct irq_domain *d, unsigned int virq, bitmap_set(ipi_resrv, base_hwirq, nr_irqs); } +int gic_irq_domain_match(struct irq_domain *d, struct device_node *node, + enum irq_domain_bus_token bus_token) +{ + /* this domain should'nt be accessed directly */ + return 0; +} + static const struct irq_domain_ops gic_irq_domain_ops = { .map = gic_irq_domain_map, - .xlate = gic_irq_domain_xlate, .alloc = gic_irq_domain_alloc, .free = gic_irq_domain_free, + .match = gic_irq_domain_match, +}; + +static int gic_dev_domain_xlate(struct irq_domain *d, struct device_node *ctrlr, + const u32 *intspec, unsigned int intsize, + irq_hw_number_t *out_hwirq, + unsigned int *out_type) +{ + if (intsize != 3) + return -EINVAL; + + if (intspec[0] == GIC_SHARED) + *out_hwirq = GIC_SHARED_TO_HWIRQ(intspec[1]); + else if (intspec[0] == GIC_LOCAL) + *out_hwirq = GIC_LOCAL_TO_HWIRQ(intspec[1]); + else + return -EINVAL; + *out_type = intspec[2] & IRQ_TYPE_SENSE_MASK; + + return 0; +} + +static int gic_dev_domain_alloc(struct irq_domain *d, unsigned int virq, + unsigned int nr_irqs, void *arg) +{ + struct irq_fwspec *fwspec = arg; + struct gic_irq_spec spec = { + .type = GIC_DEVICE, + .hwirq = fwspec->param[1], + }; + int i, ret; + bool is_shared = fwspec->param[0] == GIC_SHARED; + + if (is_shared) { + ret = irq_domain_alloc_irqs_parent(d, virq, nr_irqs, &spec); + if (ret) + return ret; + } + + for (i = 0; i < nr_irqs; i++) { + irq_hw_number_t hwirq; + + if (is_shared) + hwirq = GIC_SHARED_TO_HWIRQ(spec.hwirq + i); + else + hwirq = GIC_LOCAL_TO_HWIRQ(spec.hwirq + i); + + ret = irq_domain_set_hwirq_and_chip(d, virq + i, + hwirq, + &gic_level_irq_controller, + NULL); + if (ret) + return ret; + } + + return 0; +} + +void gic_dev_domain_free(struct irq_domain *d, unsigned int virq, + unsigned int nr_irqs) +{ + /* no real allocation is done for dev irqs, so no need to free anything */ + return; +} + +static struct irq_domain_ops gic_dev_domain_ops = { + .xlate = gic_dev_domain_xlate, + .alloc = gic_dev_domain_alloc, + .free = gic_dev_domain_free, }; static int gic_ipi_domain_xlate(struct irq_domain *d, struct device_node *ctrlr, @@ -1026,6 +1083,12 @@ static void __init __gic_init(unsigned long gic_base_addr, if (!gic_irq_domain) panic("Failed to add GIC IRQ domain"); + gic_dev_domain = irq_domain_add_hierarchy(gic_irq_domain, 0, + GIC_NUM_LOCAL_INTRS + gic_shared_intrs, + node, &gic_dev_domain_ops, NULL); + if (!gic_dev_domain) + panic("Failed to add GIC DEV domain"); + gic_ipi_domain = irq_domain_add_hierarchy(gic_irq_domain, IRQ_DOMAIN_FLAG_IPI_PER_CPU, GIC_NUM_LOCAL_INTRS + gic_shared_intrs, -- 2.20.1