Messages in this thread Patch in this message |  | | From | Vignesh Raghavendra <> | Subject | [RFC PATCH 2/2] irqchip: irq-ti-sci-inta: Introduce IRQ affinity support | Date | Sun, 22 Jan 2023 13:46:07 +0530 |
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Add support for setting IRQ affinity for VINTs which have only one event mapped to them. This just involves changing the parent IRQs affinity (GIC/INTR). Flag VINTs which have affinity configured so as to not aggregate/map more events to such VINTs.
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> --- drivers/irqchip/irq-ti-sci-inta.c | 39 +++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+)
diff --git a/drivers/irqchip/irq-ti-sci-inta.c b/drivers/irqchip/irq-ti-sci-inta.c index f1419d24568e..237cb4707cb8 100644 --- a/drivers/irqchip/irq-ti-sci-inta.c +++ b/drivers/irqchip/irq-ti-sci-inta.c @@ -64,6 +64,7 @@ struct ti_sci_inta_event_desc { * @events: Array of event descriptors assigned to this vint. * @parent_virq: Linux IRQ number that gets attached to parent * @vint_id: TISCI vint ID + * @affinity_managed flag to indicate VINT affinity is managed */ struct ti_sci_inta_vint_desc { struct irq_domain *domain; @@ -72,6 +73,7 @@ struct ti_sci_inta_vint_desc { struct ti_sci_inta_event_desc events[MAX_EVENTS_PER_VINT]; unsigned int parent_virq; u16 vint_id; + bool affinity_managed; }; /** @@ -334,6 +336,8 @@ static struct ti_sci_inta_event_desc *ti_sci_inta_alloc_irq(struct irq_domain *d vint_id = ti_sci_get_free_resource(inta->vint); if (vint_id == TI_SCI_RESOURCE_NULL) { list_for_each_entry(vint_desc, &inta->vint_list, list) { + if (vint_desc->affinity_managed) + continue; free_bit = find_first_zero_bit(vint_desc->event_map, MAX_EVENTS_PER_VINT); if (free_bit != MAX_EVENTS_PER_VINT) @@ -434,6 +438,7 @@ static int ti_sci_inta_request_resources(struct irq_data *data) return PTR_ERR(event_desc); data->chip_data = event_desc; + irq_data_update_effective_affinity(data, cpu_online_mask); return 0; } @@ -504,11 +509,45 @@ static void ti_sci_inta_ack_irq(struct irq_data *data) ti_sci_inta_manage_event(data, VINT_STATUS_OFFSET); } +#ifdef CONFIG_SMP +static int ti_sci_inta_set_affinity(struct irq_data *d, + const struct cpumask *mask_val, bool force) +{ + struct ti_sci_inta_event_desc *event_desc; + struct ti_sci_inta_vint_desc *vint_desc; + struct irq_data *parent_irq_data; + + if (cpumask_equal(irq_data_get_effective_affinity_mask(d), mask_val)) + return 0; + + event_desc = irq_data_get_irq_chip_data(d); + if (event_desc) { + vint_desc = to_vint_desc(event_desc, event_desc->vint_bit); + + /* + * Cannot set affinity if there is more than one event + * mapped to same VINT + */ + if (bitmap_weight(vint_desc->event_map, MAX_EVENTS_PER_VINT) > 1) + return -EINVAL; + + vint_desc->affinity_managed = true; + + irq_data_update_effective_affinity(d, mask_val); + parent_irq_data = irq_get_irq_data(vint_desc->parent_virq); + if (parent_irq_data->chip->irq_set_affinity) + return parent_irq_data->chip->irq_set_affinity(parent_irq_data, mask_val, force); + } + + return -EINVAL; +} +#else static int ti_sci_inta_set_affinity(struct irq_data *d, const struct cpumask *mask_val, bool force) { return -EINVAL; } +#endif /** * ti_sci_inta_set_type() - Update the trigger type of the irq. -- 2.39.0
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