From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757259AbcK2Nn1 (ORCPT ); Tue, 29 Nov 2016 08:43:27 -0500 Received: from szxga01-in.huawei.com ([58.251.152.64]:46023 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754093AbcK2NnF (ORCPT ); Tue, 29 Nov 2016 08:43:05 -0500 From: Hanjun Guo To: Marc Zyngier , "Rafael J. Wysocki" , Lorenzo Pieralisi CC: , , , Thomas Gleixner , Greg KH , Tomasz Nowicki , Ma Jun , Kefeng Wang , "Agustin Vega-Frias" , Sinan Kaya , "G Gregory" , Charles Garcia-Tobin , , , , Hanjun Guo Subject: [PATCH v4 07/11] irqchip: gicv3-its: platform-msi: scan MADT to create platform msi domain Date: Tue, 29 Nov 2016 21:39:35 +0800 Message-ID: <1480426779-31387-8-git-send-email-guohanjun@huawei.com> X-Mailer: git-send-email 1.7.12.4 In-Reply-To: <1480426779-31387-1-git-send-email-guohanjun@huawei.com> References: <1480426779-31387-1-git-send-email-guohanjun@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.175.102.37] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Hanjun Guo With the introduction of its_pmsi_init_one(), we can add some code on top for ACPI support of platform MSI. We are scanning the MADT table to get the ITS entry(ies), then use the information to create the platform msi domain for devices connect to it, just like the PCI MSI for ITS did. Signed-off-by: Hanjun Guo Tested-by: Sinan Kaya Cc: Marc Zyngier Cc: Tomasz Nowicki Cc: Thomas Gleixner --- drivers/irqchip/irq-gic-v3-its-platform-msi.c | 36 +++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/drivers/irqchip/irq-gic-v3-its-platform-msi.c b/drivers/irqchip/irq-gic-v3-its-platform-msi.c index ff72704..0be0437 100644 --- a/drivers/irqchip/irq-gic-v3-its-platform-msi.c +++ b/drivers/irqchip/irq-gic-v3-its-platform-msi.c @@ -105,6 +105,41 @@ static int __init its_pmsi_init_one(struct fwnode_handle *fwnode, return 0; } +#ifdef CONFIG_ACPI +static int __init +its_pmsi_parse_madt(struct acpi_subtable_header *header, + const unsigned long end) +{ + struct acpi_madt_generic_translator *its_entry; + struct fwnode_handle *domain_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); + domain_handle = iort_find_domain_token(its_entry->translation_id); + if (!domain_handle) { + pr_err("%s: Unable to locate ITS domain handle\n", node_name); + goto out; + } + + err = its_pmsi_init_one(domain_handle, node_name); + +out: + kfree(node_name); + return err; +} + +static void __init its_acpi_pmsi_init(void) +{ + acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR, + its_pmsi_parse_madt, 0); +} +#else +static inline void its_acpi_pmsi_init(void) { } +#endif + static void __init its_pmsi_of_init(void) { struct device_node *np; @@ -121,6 +156,7 @@ static void __init its_pmsi_of_init(void) static int __init its_pmsi_init(void) { its_pmsi_of_init(); + its_acpi_pmsi_init(); return 0; } early_initcall(its_pmsi_init); -- 1.7.12.4