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path: root/drivers/irqchip/irq-gic.c
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Diffstat (limited to 'drivers/irqchip/irq-gic.c')
-rw-r--r--drivers/irqchip/irq-gic.c129
1 files changed, 73 insertions, 56 deletions
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 471e1cdc1933..a6ce3476834e 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -151,13 +151,24 @@ static inline unsigned int gic_irq(struct irq_data *d)
/*
* Routines to acknowledge, disable and enable interrupts
*/
-static void gic_mask_irq(struct irq_data *d)
+static void gic_poke_irq(struct irq_data *d, u32 offset)
{
u32 mask = 1 << (gic_irq(d) % 32);
+ writel_relaxed(mask, gic_dist_base(d) + offset + (gic_irq(d) / 32) * 4);
+}
+
+static int gic_peek_irq(struct irq_data *d, u32 offset)
+{
+ u32 mask = 1 << (gic_irq(d) % 32);
+ return !!(readl_relaxed(gic_dist_base(d) + offset + (gic_irq(d) / 32) * 4) & mask);
+}
+
+static void gic_mask_irq(struct irq_data *d)
+{
unsigned long flags;
raw_spin_lock_irqsave(&irq_controller_lock, flags);
- writel_relaxed(mask, gic_dist_base(d) + GIC_DIST_ENABLE_CLEAR + (gic_irq(d) / 32) * 4);
+ gic_poke_irq(d, GIC_DIST_ENABLE_CLEAR);
if (gic_arch_extn.irq_mask)
gic_arch_extn.irq_mask(d);
raw_spin_unlock_irqrestore(&irq_controller_lock, flags);
@@ -165,13 +176,12 @@ static void gic_mask_irq(struct irq_data *d)
static void gic_unmask_irq(struct irq_data *d)
{
- u32 mask = 1 << (gic_irq(d) % 32);
unsigned long flags;
raw_spin_lock_irqsave(&irq_controller_lock, flags);
if (gic_arch_extn.irq_unmask)
gic_arch_extn.irq_unmask(d);
- writel_relaxed(mask, gic_dist_base(d) + GIC_DIST_ENABLE_SET + (gic_irq(d) / 32) * 4);
+ gic_poke_irq(d, GIC_DIST_ENABLE_SET);
raw_spin_unlock_irqrestore(&irq_controller_lock, flags);
}
@@ -186,6 +196,55 @@ static void gic_eoi_irq(struct irq_data *d)
writel_relaxed(gic_irq(d), gic_cpu_base(d) + GIC_CPU_EOI);
}
+static int gic_irq_set_irqchip_state(struct irq_data *d,
+ enum irqchip_irq_state which, bool val)
+{
+ u32 reg;
+
+ switch (which) {
+ case IRQCHIP_STATE_PENDING:
+ reg = val ? GIC_DIST_PENDING_SET : GIC_DIST_PENDING_CLEAR;
+ break;
+
+ case IRQCHIP_STATE_ACTIVE:
+ reg = val ? GIC_DIST_ACTIVE_SET : GIC_DIST_ACTIVE_CLEAR;
+ break;
+
+ case IRQCHIP_STATE_MASKED:
+ reg = val ? GIC_DIST_ENABLE_CLEAR : GIC_DIST_ENABLE_SET;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ gic_poke_irq(d, reg);
+ return 0;
+}
+
+static int gic_irq_get_irqchip_state(struct irq_data *d,
+ enum irqchip_irq_state which, bool *val)
+{
+ switch (which) {
+ case IRQCHIP_STATE_PENDING:
+ *val = gic_peek_irq(d, GIC_DIST_PENDING_SET);
+ break;
+
+ case IRQCHIP_STATE_ACTIVE:
+ *val = gic_peek_irq(d, GIC_DIST_ACTIVE_SET);
+ break;
+
+ case IRQCHIP_STATE_MASKED:
+ *val = !gic_peek_irq(d, GIC_DIST_ENABLE_SET);
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
static int gic_set_type(struct irq_data *d, unsigned int type)
{
void __iomem *base = gic_dist_base(d);
@@ -329,6 +388,8 @@ static struct irq_chip gic_chip = {
.irq_set_affinity = gic_set_affinity,
#endif
.irq_set_wake = gic_set_wake,
+ .irq_get_irqchip_state = gic_irq_get_irqchip_state,
+ .irq_set_irqchip_state = gic_irq_set_irqchip_state,
};
void __init gic_cascade_irq(unsigned int gic_nr, unsigned int irq)
@@ -353,7 +414,7 @@ static u8 gic_get_cpumask(struct gic_chip_data *gic)
break;
}
- if (!mask)
+ if (!mask && num_possible_cpus() > 1)
pr_crit("GIC CPU mask not found - kernel will fail to boot.\n");
return mask;
@@ -802,15 +863,12 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq,
irq_domain_set_info(d, irq, hw, &gic_chip, d->host_data,
handle_fasteoi_irq, NULL, NULL);
set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
-
- gic_routable_irq_domain_ops->map(d, irq, hw);
}
return 0;
}
static void gic_irq_domain_unmap(struct irq_domain *d, unsigned int irq)
{
- gic_routable_irq_domain_ops->unmap(d, irq);
}
static int gic_irq_domain_xlate(struct irq_domain *d,
@@ -829,16 +887,8 @@ static int gic_irq_domain_xlate(struct irq_domain *d,
*out_hwirq = intspec[1] + 16;
/* For SPIs, we need to add 16 more to get the GIC irq ID number */
- if (!intspec[0]) {
- ret = gic_routable_irq_domain_ops->xlate(d, controller,
- intspec,
- intsize,
- out_hwirq,
- out_type);
-
- if (IS_ERR_VALUE(ret))
- return ret;
- }
+ if (!intspec[0])
+ *out_hwirq += 16;
*out_type = intspec[2] & IRQ_TYPE_SENSE_MASK;
@@ -895,37 +945,11 @@ static const struct irq_domain_ops gic_irq_domain_ops = {
.xlate = gic_irq_domain_xlate,
};
-/* Default functions for routable irq domain */
-static int gic_routable_irq_domain_map(struct irq_domain *d, unsigned int irq,
- irq_hw_number_t hw)
+void gic_set_irqchip_flags(unsigned long flags)
{
- return 0;
+ gic_chip.flags |= flags;
}
-static void gic_routable_irq_domain_unmap(struct irq_domain *d,
- unsigned int irq)
-{
-}
-
-static int gic_routable_irq_domain_xlate(struct irq_domain *d,
- struct device_node *controller,
- const u32 *intspec, unsigned int intsize,
- unsigned long *out_hwirq,
- unsigned int *out_type)
-{
- *out_hwirq += 16;
- return 0;
-}
-
-static const struct irq_domain_ops gic_default_routable_irq_domain_ops = {
- .map = gic_routable_irq_domain_map,
- .unmap = gic_routable_irq_domain_unmap,
- .xlate = gic_routable_irq_domain_xlate,
-};
-
-const struct irq_domain_ops *gic_routable_irq_domain_ops =
- &gic_default_routable_irq_domain_ops;
-
void __init gic_init_bases(unsigned int gic_nr, int irq_start,
void __iomem *dist_base, void __iomem *cpu_base,
u32 percpu_offset, struct device_node *node)
@@ -933,7 +957,6 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start,
irq_hw_number_t hwirq_base;
struct gic_chip_data *gic;
int gic_irqs, irq_base, i;
- int nr_routable_irqs;
BUG_ON(gic_nr >= MAX_GIC_NR);
@@ -989,15 +1012,9 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start,
gic->gic_irqs = gic_irqs;
if (node) { /* DT case */
- const struct irq_domain_ops *ops = &gic_irq_domain_hierarchy_ops;
-
- if (!of_property_read_u32(node, "arm,routable-irqs",
- &nr_routable_irqs)) {
- ops = &gic_irq_domain_ops;
- gic_irqs = nr_routable_irqs;
- }
-
- gic->domain = irq_domain_add_linear(node, gic_irqs, ops, gic);
+ gic->domain = irq_domain_add_linear(node, gic_irqs,
+ &gic_irq_domain_hierarchy_ops,
+ gic);
} else { /* Non-DT case */
/*
* For primary GICs, skip over SGIs.
generated by cgit (git 2.34.1) at 2024-06-03 12:12:39 +0000