We can now lookup the base ITS domain, making it possible to initialize the PCI/MSI code independently from the main ITS subsystem.
Signed-off-by: Marc Zyngier <[email protected]> --- drivers/irqchip/irq-gic-v3-its-pci-msi.c | 36 +++++++++++++++++++++++++++++--- drivers/irqchip/irq-gic-v3-its.c | 14 +------------ include/linux/irqchip/arm-gic-v3.h | 3 --- 3 files changed, 34 insertions(+), 19 deletions(-) diff --git a/drivers/irqchip/irq-gic-v3-its-pci-msi.c b/drivers/irqchip/irq-gic-v3-its-pci-msi.c index 7614721..4de130ac 100644 --- a/drivers/irqchip/irq-gic-v3-its-pci-msi.c +++ b/drivers/irqchip/irq-gic-v3-its-pci-msi.c @@ -98,8 +98,38 @@ static struct msi_domain_info its_pci_msi_domain_info = { .chip = &its_msi_irq_chip, }; -struct irq_domain *its_pci_msi_alloc_domain(struct device_node *np, - struct irq_domain *parent) +static struct of_device_id its_device_id[] = { + { .compatible = "arm,gic-v3-its", }, + {}, +}; + +static int __init its_pci_msi_init(void) { - return pci_msi_create_irq_domain(np, &its_pci_msi_domain_info, parent); + struct device_node *np; + struct irq_domain *parent; + + for (np = of_find_matching_node(NULL, its_device_id); np; + np = of_find_matching_node(np, its_device_id)) { + if (!of_property_read_bool(np, "msi-controller")) + continue; + + parent = irq_find_matching_host(np, DOMAIN_BUS_PLATFORM_MSI); + if (!parent) { + pr_err("%s: unable to locate ITS domain\n", + np->full_name); + continue; + } + + if (!pci_msi_create_irq_domain(np, &its_pci_msi_domain_info, + parent)) { + pr_err("%s: unable to create PCI domain\n", + np->full_name); + continue; + } + + pr_info("PCI/MSI: %s domain created\n", np->full_name); + } + + return 0; } +subsys_initcall(its_pci_msi_init); diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index c0b574e..49020da 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -60,7 +60,6 @@ struct its_collection { struct its_node { raw_spinlock_t lock; struct list_head entry; - struct irq_domain *domain; void __iomem *base; unsigned long phys_base; struct its_cmd_block *cmd_base; @@ -1316,7 +1315,7 @@ static int its_probe(struct device_node *node, struct irq_domain *parent) struct resource res; struct its_node *its; void __iomem *its_base; - struct irq_domain *inner_domain = NULL; + struct irq_domain *inner_domain; u32 val; u64 baser, tmp; int err; @@ -1414,12 +1413,6 @@ static int its_probe(struct device_node *node, struct irq_domain *parent) inner_domain->parent = parent; inner_domain->bus_token = DOMAIN_BUS_PLATFORM_MSI; - - its->domain = its_pci_msi_alloc_domain(node, inner_domain); - if (!its->domain) { - err = -ENOMEM; - goto out_free_domains; - } } spin_lock(&its_lock); @@ -1428,11 +1421,6 @@ static int its_probe(struct device_node *node, struct irq_domain *parent) return 0; -out_free_domains: - if (its->domain) - irq_domain_remove(its->domain); - if (inner_domain) - irq_domain_remove(inner_domain); out_free_tables: its_free_tables(its); out_free_cmd: diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h index d6149ba..01caef8 100644 --- a/include/linux/irqchip/arm-gic-v3.h +++ b/include/linux/irqchip/arm-gic-v3.h @@ -392,9 +392,6 @@ int its_init(struct device_node *node, struct rdists *rdists, int its_msi_prepare(struct irq_domain *domain, u32 dev_id, int nvec, msi_alloc_info_t *info); -struct irq_domain *its_pci_msi_alloc_domain(struct device_node *node, - struct irq_domain *parent); - #endif #endif -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
