On Wednesday 24 February 2021 14:11:30 Jianjun Wang wrote:
> +static int mtk_msi_bottom_domain_alloc(struct irq_domain *domain,
> + unsigned int virq, unsigned int nr_irqs,
> + void *arg)
> +{
> + struct mtk_pcie_port *port = domain->host_data;
> + struct mtk_msi_set *msi_set;
> + int i, hwirq, set_idx;
> +
> + mutex_lock(&port->lock);
> +
> + hwirq = bitmap_find_free_region(port->msi_irq_in_use, PCIE_MSI_IRQS_NUM,
> + order_base_2(nr_irqs));
> +
> + mutex_unlock(&port->lock);
> +
> + if (hwirq < 0)
> + return -ENOSPC;
> +
> + set_idx = hwirq / PCIE_MSI_IRQS_PER_SET;
> + msi_set = &port->msi_sets[set_idx];
> +
> + for (i = 0; i < nr_irqs; i++)
> + irq_domain_set_info(domain, virq + i, hwirq + i,
> + &mtk_msi_bottom_irq_chip, msi_set,
> + handle_edge_irq, NULL, NULL);
> +
> + return 0;
> +}
> +
> +static void mtk_msi_bottom_domain_free(struct irq_domain *domain,
> + unsigned int virq, unsigned int nr_irqs)
> +{
> + struct mtk_pcie_port *port = domain->host_data;
> + struct irq_data *data = irq_domain_get_irq_data(domain, virq);
> +
> + mutex_lock(&port->lock);
> +
> + bitmap_clear(port->msi_irq_in_use, data->hwirq, nr_irqs);
Marc, should not be there bitmap_release_region() with order_base_2()?
bitmap_release_region(port->msi_irq_in_use, data->hwirq, order_base_2(nr_irqs));
Because mtk_msi_bottom_domain_alloc() is allocating
order_base_2(nr_irqs) interrupts, not only nr_irqs.
> +
> + mutex_unlock(&port->lock);
> +
> + irq_domain_free_irqs_common(domain, virq, nr_irqs);
> +}
