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| author | Cédric Le Goater <clg@kaod.org> | 2021-07-01 15:27:38 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-08-10 23:15:00 +1000 |
| commit | e4f0aa3b4731430ad73fb4485e97f751c7500668 (patch) | |
| tree | 2f2f3c51fa98fe5556df177692649d9ad19d4e1a | |
| parent | 53b34e8db73af98fa652641bf490384dc665d0f2 (diff) | |
| download | linux-e4f0aa3b4731430ad73fb4485e97f751c7500668.tar.gz | |
powerpc/xics: Add support for IRQ domain hierarchy
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 <clg@kaod.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210701132750.1475580-21-clg@kaod.org
| -rw-r--r-- | arch/powerpc/sysdev/xics/xics-common.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/xics/xics-common.c b/arch/powerpc/sysdev/xics/xics-common.c index 18d3de2f2249..febab57f060f 100644 --- a/arch/powerpc/sysdev/xics/xics-common.c +++ b/arch/powerpc/sysdev/xics/xics-common.c @@ -406,7 +406,48 @@ int xics_retrigger(struct irq_data *data) return 0; } +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY +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); +} +#endif + static const struct irq_domain_ops xics_host_ops = { +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY + .alloc = xics_host_domain_alloc, + .free = xics_host_domain_free, + .translate = xics_host_domain_translate, +#endif .match = xics_host_match, .map = xics_host_map, .xlate = xics_host_xlate, |