From patchwork Thu Oct 6 08:45:23 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 9364021 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 5A3F4607D3 for ; Thu, 6 Oct 2016 08:50:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4881B28E68 for ; Thu, 6 Oct 2016 08:50:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3BD5C28E70; Thu, 6 Oct 2016 08:50:35 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C010828E68 for ; Thu, 6 Oct 2016 08:50:34 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bs4MO-0006uI-I5; Thu, 06 Oct 2016 08:49:00 +0000 Received: from mx1.redhat.com ([209.132.183.28]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bs4K0-0005FM-PT for linux-arm-kernel@lists.infradead.org; Thu, 06 Oct 2016 08:46:35 +0000 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 72AFD769F6; Thu, 6 Oct 2016 08:46:14 +0000 (UTC) Received: from localhost.redhat.com (vpn1-6-233.ams2.redhat.com [10.36.6.233]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u968jZtP011450; Thu, 6 Oct 2016 04:46:10 -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 Subject: [PATCH v13 07/15] irqchip/gicv3-its: Register the MSI doorbell Date: Thu, 6 Oct 2016 08:45:23 +0000 Message-Id: <1475743531-4780-8-git-send-email-eric.auger@redhat.com> In-Reply-To: <1475743531-4780-1-git-send-email-eric.auger@redhat.com> References: <1475743531-4780-1-git-send-email-eric.auger@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Thu, 06 Oct 2016 08:46:14 +0000 (UTC) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161006_014633_523485_09FC825E X-CRM114-Status: GOOD ( 13.04 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: drjones@redhat.com, kvm@vger.kernel.org, Jean-Philippe.Brucker@arm.com, Manish.Jaggi@caviumnetworks.com, p.fedin@samsung.com, linux-kernel@vger.kernel.org, Bharat.Bhushan@freescale.com, iommu@lists.linux-foundation.org, pranav.sawargaonkar@gmail.com, yehuday@marvell.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This patch registers the ITS global doorbell. Registered information are needed to set up the KVM passthrough use case. Signed-off-by: Eric Auger --- 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 #include #include +#include #include #include @@ -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; }