[PATCH v13 07/15] irqchip/gicv3-its: Register the MSI doorbell
From: eric.auger@redhat.com (Eric Auger)
Date: 2016-10-06 08:46:19
Also in:
kvm, linux-iommu, lkml
Subsystem:
arm generic interrupt controller drivers, irqchip drivers, the rest · Maintainers:
Marc Zyngier, Thomas Gleixner, Linus Torvalds
This patch registers the ITS global doorbell. Registered information are needed to set up the KVM passthrough use case. Signed-off-by: Eric Auger <eric.auger@redhat.com> --- v12 -> v13: - use new doorbell registration prototype v11 -> v12: - use new irq_get_msi_doorbell_info name - simplify error handling v10 -> v11: - adapt to new doorbell registration API and implement msi_doorbell_info --- drivers/irqchip/irq-gic-v3-its.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 98ff669..3fc715e 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c@@ -30,6 +30,7 @@ #include <linux/of_platform.h> #include <linux/percpu.h> #include <linux/slab.h> +#include <linux/msi-doorbell.h> #include <linux/irqchip.h> #include <linux/irqchip/arm-gic-v3.h>
@@ -86,6 +87,7 @@ struct its_node { u32 ite_size; u32 device_ids; int numa_node; + struct msi_doorbell_info *doorbell_info; }; #define ITS_ITT_ALIGN SZ_256
@@ -1717,6 +1719,7 @@ static int __init its_probe(struct device_node *node, if (of_property_read_bool(node, "msi-controller")) { struct msi_domain_info *info; + phys_addr_t translater; info = kzalloc(sizeof(*info), GFP_KERNEL); if (!info) {
@@ -1724,10 +1727,21 @@ static int __init its_probe(struct device_node *node, goto out_free_tables; } + translater = its->phys_base + GITS_TRANSLATER; + err = msi_doorbell_register_global(translater, sizeof(u32), + true, &its->doorbell_info); + + if (err) { + kfree(info); + goto out_free_tables; + } + + inner_domain = irq_domain_add_tree(node, &its_domain_ops, its); if (!inner_domain) { err = -ENOMEM; kfree(info); + msi_doorbell_unregister_global(its->doorbell_info); goto out_free_tables; }
--
1.9.1