XICS doesn't have any state associated with the IRQ. The support is
straightforward and simpler than for XIVE.
Signed-off-by: Cédric Le Goater <c...@kaod.org>
---
arch/powerpc/sysdev/xics/xics-common.c | 37 ++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/arch/powerpc/sysdev/xics/xics-common.c
b/arch/powerpc/sysdev/xics/xics-common.c
index 9815873333c7..05d21005dc79 100644
--- a/arch/powerpc/sysdev/xics/xics-common.c
+++ b/arch/powerpc/sysdev/xics/xics-common.c
@@ -406,7 +406,44 @@ int xics_retrigger(struct irq_data *data)
return 0;
}
+static int xics_host_domain_translate(struct irq_domain *d, struct irq_fwspec
*fwspec,
+ unsigned long *hwirq, unsigned int *type)
+{
+ return xics_host_xlate(d, to_of_node(fwspec->fwnode), fwspec->param,
+ fwspec->param_count, hwirq, type);
+}
+
+static int xics_host_domain_alloc(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs, void *arg)
+{
+ struct irq_fwspec *fwspec = arg;
+ irq_hw_number_t hwirq;
+ unsigned int type = IRQ_TYPE_NONE;
+ int i, rc;
+
+ rc = xics_host_domain_translate(domain, fwspec, &hwirq, &type);
+ if (rc)
+ return rc;
+
+ pr_debug("%s %d/%lx #%d\n", __func__, virq, hwirq, nr_irqs);
+
+ for (i = 0; i < nr_irqs; i++)
+ irq_domain_set_info(domain, virq + i, hwirq + i, xics_ics->chip,
+ xics_ics, handle_fasteoi_irq, NULL, NULL);
+
+ return 0;
+}
+
+static void xics_host_domain_free(struct irq_domain *domain,
+ unsigned int virq, unsigned int nr_irqs)
+{
+ pr_debug("%s %d #%d\n", __func__, virq, nr_irqs);
+}
+
static const struct irq_domain_ops xics_host_ops = {
+ .alloc = xics_host_domain_alloc,
+ .free = xics_host_domain_free,
+ .translate = xics_host_domain_translate,
.match = xics_host_match,
.map = xics_host_map,
.xlate = xics_host_xlate,
--
2.26.3
