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[176.36.245.220]) by smtp.gmail.com with ESMTPSA id f8sm151147lfq.168.2021.10.07.22.55.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Oct 2021 22:55:40 -0700 (PDT) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: ed7e8cc1-4239-4f45-8045-5b34d893a9a8 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=EUxyn0W/J9FSEJt/oYDsZ4o/QnKV7HT+djJUv5IJGRI=; b=FOHeQrPpZjYnooNZoJwcDT+3DsxC7jSXr0W62SmV6caWCd9lQwvAm+woeZ84HrSy8C wcj5F9sgXkqc2rQqDAxnc0LAj5WNybYKIIJxPsCffDMF0/UqdzXIxbyNLU9Us5OnhOE/ F38tNM5+VU7HjSAxwtMytOdTgqLiTfRoDuUS8ORW5yjmm13zkM2bHWAMBVznfRVfkjl3 rpJBF+8o18GItAHoAmDNdWYYxvthFdd9ZGPJCTGqhR5J3j6UExtc06qbyKnFfoSQkgZL 71JFOK4QDeIQy/KkM4FiO48iayIr0i4m2VYfLp1HJyu108kte47sfl+1vs2rloZD/2tN Uh7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=EUxyn0W/J9FSEJt/oYDsZ4o/QnKV7HT+djJUv5IJGRI=; b=WcPvAzEwT5u3Pz/Q424gWlNqlFSglK7ReC0sGZmEE/ObbGFEmTm6k47iWjOI8UOdC2 X49jTVDc2buAuvkzAadUuDm9qKTAZZcAHyhYc/+p6eJ3eyUOR37zcxzooA2B47ibIk6U cEXIEDwUwNySkl95z6QaohyozizNqaOA2SDAL4uj9RPoK4t3+v1K8vbclEfLTxHc6QLM Ec71BP6XkJBekf0uL+ghlMOUp1+ooX3YeN3hatx0yPqpdhUIsNwG6+DFoJNBx7+3Gnlq wbvr9dGdPTacRNPPQCQd4m3mLDYVYlW3UPHqCU+1P/6+J8llWuphatDDUh+f+PLTTWll oqGA== X-Gm-Message-State: AOAM530H8xeW39bUdrssGL66EcpmbEiFJAbUBXmkd8V02/yH28ePM3pK sE2m3qvNK6V0j/eyTEZTfPcCwRWkpIU= X-Google-Smtp-Source: ABdhPJzpgP/E37Fhmrcnp+lC6oW8HAGf4BnPXjfohPryrmrhNQPYI3/Cf15FFhtcGNbKCrjKVfxDgg== X-Received: by 2002:a05:6512:3502:: with SMTP id h2mr8706956lfs.415.1633672540556; Thu, 07 Oct 2021 22:55:40 -0700 (PDT) From: Oleksandr Andrushchenko To: xen-devel@lists.xenproject.org Cc: julien@xen.org, sstabellini@kernel.org, oleksandr_tyshchenko@epam.com, volodymyr_babchuk@epam.com, Artem_Mygaiev@epam.com, roger.pau@citrix.com, jbeulich@suse.com, andrew.cooper3@citrix.com, george.dunlap@citrix.com, paul@xen.org, bertrand.marquis@arm.com, rahul.singh@arm.com, Oleksandr Andrushchenko Subject: [PATCH v5 02/10] xen/arm: Introduce pci_find_host_bridge_node helper Date: Fri, 8 Oct 2021 08:55:27 +0300 Message-Id: <20211008055535.337436-3-andr2000@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211008055535.337436-1-andr2000@gmail.com> References: <20211008055535.337436-1-andr2000@gmail.com> MIME-Version: 1.0 From: Oleksandr Andrushchenko Get host bridge node given a PCI device attached to it. This helper will be re-used for adding PCI devices by the subsequent patches. Signed-off-by: Oleksandr Andrushchenko Signed-off-by: Oleksandr Tyshchenko Reviewed-by: Stefano Stabellini Reviewed-by: Rahul Singh Tested-by: Rahul Singh --- Since v2: - !! dropped Stefano's r-b because of the changes - s/PRI_pci/%pp after rebase onto Arm series --- xen/arch/arm/pci/pci-host-common.c | 16 ++++++++++++++++ xen/include/asm-arm/pci.h | 1 + 2 files changed, 17 insertions(+) diff --git a/xen/arch/arm/pci/pci-host-common.c b/xen/arch/arm/pci/pci-host-common.c index 593beeb48ce4..592c01aae5bb 100644 --- a/xen/arch/arm/pci/pci-host-common.c +++ b/xen/arch/arm/pci/pci-host-common.c @@ -276,6 +276,22 @@ int pci_get_host_bridge_segment(const struct dt_device_node *node, return -EINVAL; } +/* + * Get host bridge node given a device attached to it. + */ +struct dt_device_node *pci_find_host_bridge_node(struct device *dev) +{ + struct pci_host_bridge *bridge; + struct pci_dev *pdev = dev_to_pci(dev); + + bridge = pci_find_host_bridge(pdev->seg, pdev->bus); + if ( unlikely(!bridge) ) + { + printk(XENLOG_ERR "Unable to find PCI bridge for %pp\n", &pdev->sbdf); + return NULL; + } + return bridge->dt_node; +} /* * Local variables: * mode: C diff --git a/xen/include/asm-arm/pci.h b/xen/include/asm-arm/pci.h index 7a91ebbdaf0c..9aa8eca53175 100644 --- a/xen/include/asm-arm/pci.h +++ b/xen/include/asm-arm/pci.h @@ -99,6 +99,7 @@ void __iomem *pci_ecam_map_bus(struct pci_host_bridge *bridge, struct pci_host_bridge *pci_find_host_bridge(uint16_t segment, uint8_t bus); int pci_get_host_bridge_segment(const struct dt_device_node *node, uint16_t *segment); +struct dt_device_node *pci_find_host_bridge_node(struct device *dev); static always_inline bool is_pci_passthrough_enabled(void) {