From patchwork Mon Jun 20 11:02:21 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomasz Nowicki X-Patchwork-Id: 637938 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3rY7Lf3GKQz9t0N for ; Mon, 20 Jun 2016 21:05:30 +1000 (AEST) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=semihalf-com.20150623.gappssmtp.com header.i=@semihalf-com.20150623.gappssmtp.com header.b=zZzHiMOn; dkim-atps=neutral Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754607AbcFTLF2 (ORCPT ); Mon, 20 Jun 2016 07:05:28 -0400 Received: from mail-lf0-f53.google.com ([209.85.215.53]:35306 "EHLO mail-lf0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932451AbcFTLED (ORCPT ); Mon, 20 Jun 2016 07:04:03 -0400 Received: by mail-lf0-f53.google.com with SMTP id l188so35204981lfe.2 for ; Mon, 20 Jun 2016 04:04:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=semihalf-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Iqt2z0KCDi49as4mcvy2edQ6G8G2zi91tYmcx6AVl7M=; b=zZzHiMOn+e08+ez0fGzz9xh1oO+RyXAP28g1K5qaWr8DA8oYRadQJtz+Q4imR8/RXO 5I0xpSRPUQ5DQ/PLtNWRFd3QLV6pimrfYzKVLRIWsSvog6dx88o/+rf7LTOaMZpLzBdQ V1xkCWC7zRwe4RtX0M8ZMWkodDmseNfrLJMN92mJY2I3aaOeqhfKzi9pLEtIWE2FYa9n ipCveS/L2u6JmZ4sdPhFbLFwktNsyQDl2n8XsTuxYJpvgy8Imp4rD2NlVoCk0fo8VZz9 n0Xdei626cN/6K8WNljr9z1IxTG8UkylBdZjA70qOehUk8qaugMDkEuMJqEMGejnyLDE FEzA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Iqt2z0KCDi49as4mcvy2edQ6G8G2zi91tYmcx6AVl7M=; b=A1kVGx4Q5HF4SOcqkVTt118x8N7J7N64nGqcoD7cZ3yNF1lVir39F7z6Tb/+4mLdVX GxE3PGDo5tCPrq3EilGv6Oc+dJTfZF22SnjOaa8IJ1qSaxxk+VawNZbncboibkX7eedl PFJxlVuhB6hyqwMQcdUFikeh3fZdSOs1k0M/oJJBz39MBW2gCDqk/d6VoD0+sZ7TeyP9 gX4ikFJU1DIQKelYcfDYVa6z3cdTy9Ndd0enMm44GMp5zPC6Kq+cys6Yky5Mz2y5i4wE edXfnORThyuDhXasAdrmD2AHzECB1O5YRJ9sRSbiSI5oX4yyJ47Hif8WppL89n5UQ7YY PyBw== X-Gm-Message-State: ALyK8tIb2ZLfIm12eKfCHB/Q5D6HN6Y2PDfsNAuQIO7S1jN5z7Ir3vwMA/vgfeTrYcTcYA== X-Received: by 10.25.20.213 with SMTP id 82mr4106382lfu.90.1466420642013; Mon, 20 Jun 2016 04:04:02 -0700 (PDT) Received: from tn-HP-4.semihalf.local (31-172-191-173.noc.fibertech.net.pl. [31.172.191.173]) by smtp.gmail.com with ESMTPSA id e10sm44291lbr.36.2016.06.20.04.03.59 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 20 Jun 2016 04:04:01 -0700 (PDT) From: Tomasz Nowicki To: marc.zyngier@arm.com, tglx@linutronix.de, jason@lakedaemon.net, rjw@rjwysocki.net, bhelgaas@google.com, lorenzo.pieralisi@arm.com, robert.richter@caviumnetworks.com, shijie.huang@arm.com, Suravee.Suthikulpanit@amd.com, hanjun.guo@linaro.org Cc: al.stone@linaro.org, mw@semihalf.com, graeme.gregory@linaro.org, Catalin.Marinas@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, ddaney.cavm@gmail.com, okaya@codeaurora.org, andrea.gallo@linaro.org, linux-pci@vger.kernel.org, Tomasz Nowicki Subject: [PATCH V7 8/8] irqchip/gicv3-its: Use MADT ITS subtable to do PCI/MSI domain initialization Date: Mon, 20 Jun 2016 13:02:21 +0200 Message-Id: <1466420541-20101-9-git-send-email-tn@semihalf.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1466420541-20101-1-git-send-email-tn@semihalf.com> References: <1466420541-20101-1-git-send-email-tn@semihalf.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Let ACPI build ITS PCI MSI domain. ACPI code is responsible for retrieving inner domain token and passing it on to its_pci_msi_init_one generic init call. IORT maintains list of registered domain tokens and allows to find corresponding domain based on MADT ITS subtable ID info. Signed-off-by: Tomasz Nowicki Acked-by: Marc Zyngier Reviewed-by: Hanjun Guo --- drivers/irqchip/irq-gic-v3-its-pci-msi.c | 44 ++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/drivers/irqchip/irq-gic-v3-its-pci-msi.c b/drivers/irqchip/irq-gic-v3-its-pci-msi.c index d2c2496..ae7221c 100644 --- a/drivers/irqchip/irq-gic-v3-its-pci-msi.c +++ b/drivers/irqchip/irq-gic-v3-its-pci-msi.c @@ -15,6 +15,7 @@ * along with this program. If not, see . */ +#include #include #include #include @@ -144,9 +145,52 @@ static int __init its_pci_of_msi_init(void) return 0; } +#ifdef CONFIG_ACPI + +static int __init +its_pci_msi_parse_madt(struct acpi_subtable_header *header, + const unsigned long end) +{ + struct acpi_madt_generic_translator *its_entry; + struct fwnode_handle *dom_handle; + const char *node_name; + int err = -ENXIO; + + its_entry = (struct acpi_madt_generic_translator *)header; + node_name = kasprintf(GFP_KERNEL, "ITS@0x%lx", + (long)its_entry->base_address); + dom_handle = iort_find_domain_token(its_entry->translation_id); + if (!dom_handle) { + pr_err("%s: Unable to locate ITS domain handle\n", node_name); + goto out; + } + + err = its_pci_msi_init_one(dom_handle, node_name); + if (!err) + pr_info("PCI/MSI: %s domain created\n", node_name); + +out: + kfree(node_name); + return err; +} + +static int __init its_pci_acpi_msi_init(void) +{ + acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR, + its_pci_msi_parse_madt, 0); + return 0; +} +#else +static int __init its_pci_acpi_msi_init(void) +{ + return 0; +} +#endif + static int __init its_pci_msi_init(void) { its_pci_of_msi_init(); + its_pci_acpi_msi_init(); return 0; }