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[31.172.191.173]) by smtp.gmail.com with ESMTPSA id p21sm448233lfp.4.2016.08.11.03.06.47 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 11 Aug 2016 03:06:48 -0700 (PDT) From: Tomasz Nowicki To: marc.zyngier@arm.com, tglx@linutronix.de, jason@lakedaemon.net, rjw@rjwysocki.net, helgaas@kernel.org, rafael@kernel.org, Lorenzo.Pieralisi@arm.com Cc: will.deacon@arm.com, catalin.marinas@arm.com, hanjun.guo@linaro.org, shijie.huang@arm.com, robert.richter@caviumnetworks.com, mw@semihalf.com, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linaro-acpi@lists.linaro.org, andrea.gallo@linaro.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, al.stone@linaro.org, graeme.gregory@linaro.org, ddaney.cavm@gmail.com, okaya@codeaurora.org, Tomasz Nowicki Subject: [PATCH V8 3/8] PCI/MSI: Setup MSI domain on a per-device basis using IORT ACPI table Date: Thu, 11 Aug 2016 12:06:33 +0200 Message-Id: <1470909998-16710-4-git-send-email-tn@semihalf.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1470909998-16710-1-git-send-email-tn@semihalf.com> References: <1470909998-16710-1-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 It is possible to provide information about which MSI controller to use on a per-device basis for DT. This patch supply this with ACPI support. Currently, IORT is the only one ACPI table which can provide such mapping. In order to plug IORT into MSI infrastructure we are adding ACPI equivalents for finding PCI device domain and its RID translation (pci_msi_domain_get_msi_rid and pci_msi_domain_get_msi_rid calls). Signed-off-by: Tomasz Nowicki Reviewed-by: Hanjun Guo Acked-by: Marc Zyngier Acked-by: Bjorn Helgaas --- drivers/pci/msi.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index a02981e..7bb981a 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -1498,8 +1499,8 @@ u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev) pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid); of_node = irq_domain_get_of_node(domain); - if (of_node) - rid = of_msi_map_rid(&pdev->dev, of_node, rid); + rid = of_node ? of_msi_map_rid(&pdev->dev, of_node, rid) : + iort_msi_map_rid(&pdev->dev, rid); return rid; } @@ -1515,9 +1516,13 @@ u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev) */ struct irq_domain *pci_msi_get_device_domain(struct pci_dev *pdev) { + struct irq_domain *dom; u32 rid = 0; pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid); - return of_msi_map_get_device_domain(&pdev->dev, rid); + dom = of_msi_map_get_device_domain(&pdev->dev, rid); + if (!dom) + dom = iort_get_device_domain(&pdev->dev, rid); + return dom; } #endif /* CONFIG_PCI_MSI_IRQ_DOMAIN */