From patchwork Wed Mar 11 12:44:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Philippe Brucker X-Patchwork-Id: 11431625 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6C1B418E8 for ; Wed, 11 Mar 2020 12:47:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4BA01222D9 for ; Wed, 11 Mar 2020 12:47:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="PaFI7USc" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729475AbgCKMrC (ORCPT ); Wed, 11 Mar 2020 08:47:02 -0400 Received: from mail-wm1-f65.google.com ([209.85.128.65]:53827 "EHLO mail-wm1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729459AbgCKMrB (ORCPT ); Wed, 11 Mar 2020 08:47:01 -0400 Received: by mail-wm1-f65.google.com with SMTP id 25so1932577wmk.3 for ; Wed, 11 Mar 2020 05:47:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=U47FGde+FbNcdQs+RPhyYEqijb3kd9q1HrNDc4ml5OM=; b=PaFI7UScmuJq/vQMffhQojPOeVfgLOAOjM4tY3da2DCq6MkkfzqrKf7V1Pxw17ncw8 I7lQsl4LNyrad1s2jqB7jxtjderJz1RfVJLzyzLHT+oAi/Nou6U8jheMoW1RCz5MFSmt 8TqQOYGDNPNoEyjr7Wiqwd81sNgrr8blWpNAwkKUf1YvpBlEq53rad+vRE26mSuLionw wAz0sy3xHgGF1Xt7nkvW0dLEL7P3CqIctcFCnPvoWBwkwSJ3aEqgNcQBJaSFzZUK4ZuH LE/gRrJ60DA+fHf+OG44ZIz5IHRMbefyq84xQfidyBcnHlOEgny1G6Qa9QaCs7OF3Ab7 7uwQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=U47FGde+FbNcdQs+RPhyYEqijb3kd9q1HrNDc4ml5OM=; b=QYbxmQd2T2fBN0+D3Xj8HqtP53hh1fWGJO17bqY8RFRZ0RjeKcj+lHoKi6ks7JcGb2 KIoGL1z+YXAlLryKwrkMBoHQ+rfLe3vFC6/1RZqdN0Y8Q3OzjgDHnwvbgpMBesJd3bRm G1FHrnEqh97E3AZZ8Bqj5U815ng4cGsIRxTaUglpYf3H7SzTN5Yw1jLLMpVgPa14YkCq nkOpfaTEPnYTzuM2YUOMsbCX0EKGWRyh1+n8BgrATdYs3iiNy275L4sZZH9albne4XZT xWr811s7kw5n+YDIsLXJ3kR9d68G+5zn32LkhRgYr5hQYQr+vO/p1XajVIrEm2Tc7+30 m0Ow== X-Gm-Message-State: ANhLgQ17va+zLr9Y42ETpmMSSiL7Y/pnYQh1iiSIvQljaIgsDYlsI2xh WjcTn+mpd5LjZMU/CN5ufIHAgg== X-Google-Smtp-Source: ADFU+vssp6pgSA4SHhUAKAeskjqrgFN5K6L5kBvQztm1aXqSMSSOxW9M674hcGUdXj2nfa3aXBAr9Q== X-Received: by 2002:a1c:5fc5:: with SMTP id t188mr1007198wmb.110.1583930819703; Wed, 11 Mar 2020 05:46:59 -0700 (PDT) Received: from localhost.localdomain ([2001:171b:c9a8:fbc0:116c:c27a:3e7f:5eaf]) by smtp.gmail.com with ESMTPSA id c2sm8380020wma.39.2020.03.11.05.46.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Mar 2020 05:46:59 -0700 (PDT) From: Jean-Philippe Brucker To: bhelgaas@google.com, will@kernel.org, robh+dt@kernel.org, joro@8bytes.org, baolu.lu@linux.intel.com, sudeep.holla@arm.com, linux-doc@vger.kernel.org, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-acpi@vger.kernel.org, iommu@lists.linux-foundation.org Cc: lorenzo.pieralisi@arm.com, corbet@lwn.net, mark.rutland@arm.com, liviu.dudau@arm.com, guohanjun@huawei.com, rjw@rjwysocki.net, lenb@kernel.org, robin.murphy@arm.com, dwmw2@infradead.org, amurray@thegoodpenguin.co.uk, frowand.list@gmail.com, Jean-Philippe Brucker Subject: [PATCH v2 04/11] ACPI/IORT: Check ATS capability in root complex node Date: Wed, 11 Mar 2020 13:44:59 +0100 Message-Id: <20200311124506.208376-5-jean-philippe@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200311124506.208376-1-jean-philippe@linaro.org> References: <20200311124506.208376-1-jean-philippe@linaro.org> MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org When initializing a PCI root bridge, copy its "ATS supported" attribute into the root bridge. Acked-by: Hanjun Guo Signed-off-by: Jean-Philippe Brucker --- drivers/acpi/arm64/iort.c | 27 +++++++++++++++++++++++++++ drivers/acpi/pci_root.c | 3 +++ include/linux/acpi_iort.h | 8 ++++++++ 3 files changed, 38 insertions(+) diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index ed3d2d1a7ae9..d99d7f5b51e1 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -1633,6 +1633,33 @@ static void __init iort_enable_acs(struct acpi_iort_node *iort_node) } } } + +static acpi_status iort_match_host_bridge_callback(struct acpi_iort_node *node, + void *context) +{ + struct acpi_iort_root_complex *pci_rc; + struct pci_host_bridge *host_bridge = context; + + pci_rc = (struct acpi_iort_root_complex *)node->node_data; + + return pci_domain_nr(host_bridge->bus) == pci_rc->pci_segment_number ? + AE_OK : AE_NOT_FOUND; +} + +void iort_pci_host_bridge_setup(struct pci_host_bridge *host_bridge) +{ + struct acpi_iort_node *node; + struct acpi_iort_root_complex *pci_rc; + + node = iort_scan_node(ACPI_IORT_NODE_PCI_ROOT_COMPLEX, + iort_match_host_bridge_callback, host_bridge); + if (!node) + return; + + pci_rc = (struct acpi_iort_root_complex *)node->node_data; + host_bridge->ats_supported = !!(pci_rc->ats_attribute & + ACPI_IORT_ATS_SUPPORTED); +} #else static inline void iort_enable_acs(struct acpi_iort_node *iort_node) { } #endif diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index d1e666ef3fcc..eb2fb8f17c0b 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -6,6 +6,7 @@ * Copyright (C) 2001, 2002 Paul Diefenbaugh */ +#include #include #include #include @@ -917,6 +918,8 @@ struct pci_bus *acpi_pci_root_create(struct acpi_pci_root *root, if (!(root->osc_control_set & OSC_PCI_EXPRESS_LTR_CONTROL)) host_bridge->native_ltr = 0; + iort_pci_host_bridge_setup(host_bridge); + /* * Evaluate the "PCI Boot Configuration" _DSM Function. If it * exists and returns 0, we must preserve any PCI resource diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h index 8e7e2ec37f1b..7b06871cc3aa 100644 --- a/include/linux/acpi_iort.h +++ b/include/linux/acpi_iort.h @@ -10,6 +10,7 @@ #include #include #include +#include #define IORT_IRQ_MASK(irq) (irq & 0xffffffffULL) #define IORT_IRQ_TRIGGER_MASK(irq) ((irq >> 32) & 0xffffffffULL) @@ -55,4 +56,11 @@ int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) { return 0; } #endif +#if defined(CONFIG_ACPI_IORT) && defined(CONFIG_PCI) +void iort_pci_host_bridge_setup(struct pci_host_bridge *host_bridge); +#else +static inline +void iort_pci_host_bridge_setup(struct pci_host_bridge *host_bridge) { } +#endif + #endif /* __ACPI_IORT_H__ */