Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933654AbcJLNXx (ORCPT ); Wed, 12 Oct 2016 09:23:53 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36268 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933593AbcJLNXK (ORCPT ); Wed, 12 Oct 2016 09:23:10 -0400 From: Eric Auger To: eric.auger@redhat.com, eric.auger.pro@gmail.com, christoffer.dall@linaro.org, marc.zyngier@arm.com, robin.murphy@arm.com, alex.williamson@redhat.com, will.deacon@arm.com, joro@8bytes.org, tglx@linutronix.de, jason@lakedaemon.net, linux-arm-kernel@lists.infradead.org Cc: kvm@vger.kernel.org, drjones@redhat.com, linux-kernel@vger.kernel.org, Bharat.Bhushan@freescale.com, pranav.sawargaonkar@gmail.com, p.fedin@samsung.com, iommu@lists.linux-foundation.org, Jean-Philippe.Brucker@arm.com, yehuday@marvell.com, Manish.Jaggi@caviumnetworks.com Subject: [PATCH v14 08/16] irqchip/gicv3-its: Register the MSI doorbell Date: Wed, 12 Oct 2016 13:22:16 +0000 Message-Id: <1476278544-3397-9-git-send-email-eric.auger@redhat.com> In-Reply-To: <1476278544-3397-1-git-send-email-eric.auger@redhat.com> References: <1476278544-3397-1-git-send-email-eric.auger@redhat.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Wed, 12 Oct 2016 13:23:10 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1719 Lines: 66 This patch registers the ITS global doorbell. Registered information are needed to set up the KVM passthrough use case. Signed-off-by: Eric Auger --- v13 -> v14: - use iommu_msi_doorbell_alloc/free 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 | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 98ff669..b42e006 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -86,6 +86,7 @@ struct its_node { u32 ite_size; u32 device_ids; int numa_node; + struct iommu_msi_doorbell_info *doorbell_info; }; #define ITS_ITT_ALIGN SZ_256 @@ -1717,6 +1718,7 @@ 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 +1726,21 @@ static int __init its_probe(struct device_node *node, goto out_free_tables; } + translater = its->phys_base + GITS_TRANSLATER; + its->doorbell_info = + iommu_msi_doorbell_alloc(translater, sizeof(u32), true); + + if (IS_ERR(its->doorbell_info)) { + kfree(info); + goto out_free_tables; + } + + inner_domain = irq_domain_add_tree(node, &its_domain_ops, its); if (!inner_domain) { err = -ENOMEM; kfree(info); + iommu_msi_doorbell_free(its->doorbell_info); goto out_free_tables; } -- 1.9.1