From mboxrd@z Thu Jan 1 00:00:00 1970 From: eric.auger@redhat.com (Eric Auger) Date: Tue, 7 Jun 2016 16:01:26 +0000 Subject: [PATCH v10 7/9] irqchip/gicv3-its: register the MSI global doorbell In-Reply-To: <1465315288-5931-1-git-send-email-eric.auger@redhat.com> References: <1465315288-5931-1-git-send-email-eric.auger@redhat.com> Message-ID: <1465315288-5931-8-git-send-email-eric.auger@redhat.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This patch adds the registration of the MSI global doorbell in gicv3-its driver. This will allow the msi layer to iommu_map this doorbell when requested. Signed-off-by: Eric Auger --- 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 5eb1f9e..ed9dfce 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -29,6 +29,8 @@ #include #include #include +#include +#include #include #include @@ -1607,6 +1609,7 @@ 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) { @@ -1614,10 +1617,21 @@ static int __init its_probe(struct device_node *node, goto out_free_tables; } + translater = its->phys_base + GITS_TRANSLATER; + err = msi_doorbell_register_global(its, translater, + sizeof(u32), + IOMMU_WRITE | IOMMU_MMIO, true); + 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(its); goto out_free_tables; } -- 1.9.1