From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Auger 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> References: <1476278544-3397-1-git-send-email-eric.auger@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1476278544-3397-1-git-send-email-eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, eric.auger.pro-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, christoffer.dall-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, marc.zyngier-5wv7dgnIgG8@public.gmane.org, robin.murphy-5wv7dgnIgG8@public.gmane.org, alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, will.deacon-5wv7dgnIgG8@public.gmane.org, joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org, tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org, jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org Cc: drjones-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Manish.Jaggi-M3mlKVOIwJVv6pq1l3V1OdBPR1lH4CV8@public.gmane.org, p.fedin-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, pranav.sawargaonkar-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, yehuday-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org List-Id: iommu@lists.linux-foundation.org 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