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irqchip/mips-gic: Add device hierarchy domain

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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 <qais.yousef@imgtec.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: <jason@lakedaemon.net>
Cc: <marc.zyngier@arm.com>
Cc: <jiang.liu@linux.intel.com>
Cc: <linux-mips@linux-mips.org>
Cc: <lisa.parratt@imgtec.com>
Cc: Qais Yousef <qsyousef@gmail.com>
Link: http://lkml.kernel.org/r/1449580830-23652-14-git-send-email-qais.yousef@imgtec.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Qais Yousef 2015-12-08 13:20:24 +00:00 committed by Thomas Gleixner
parent 2af70a9620
commit c98c1822ee
1 changed files with 83 additions and 20 deletions
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103
drivers/irqchip/irq-mips-gic.c
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@ -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,