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Thu, 30 Apr 2020 07:40:46 -0700 (PDT) Received: from localhost.localdomain ([2001:171b:226e:c200:c43b:ef78:d083:b355]) by smtp.gmail.com with ESMTPSA id n2sm4153286wrt.33.2020.04.30.07.40.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Apr 2020 07:40:45 -0700 (PDT) From: Jean-Philippe Brucker To: iommu@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, linux-mm@kvack.org Cc: joro@8bytes.org, catalin.marinas@arm.com, will@kernel.org, robin.murphy@arm.com, kevin.tian@intel.com, baolu.lu@linux.intel.com, Jonathan.Cameron@huawei.com, jacob.jun.pan@linux.intel.com, christian.koenig@amd.com, felix.kuehling@amd.com, zhangfei.gao@linaro.org, jgg@ziepe.ca, xuzaibo@huawei.com, fenghua.yu@intel.com, hch@infradead.org, Jean-Philippe Brucker , Bjorn Helgaas , Kuppuswamy Sathyanarayanan Subject: [PATCH v6 23/25] PCI/ATS: Add PRI stubs Date: Thu, 30 Apr 2020 16:34:22 +0200 Message-Id: <20200430143424.2787566-24-jean-philippe@linaro.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200430143424.2787566-1-jean-philippe@linaro.org> References: <20200430143424.2787566-1-jean-philippe@linaro.org> MIME-Version: 1.0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The SMMUv3 driver, which can be built without CONFIG_PCI, will soon gain support for PRI. Partially revert commit c6e9aefbf9db ("PCI/ATS: Remove unused PRI and PASID stubs") to re-introduce the PRI stubs, and avoid adding more #ifdefs to the SMMU driver. Acked-by: Bjorn Helgaas Reviewed-by: Kuppuswamy Sathyanarayanan Signed-off-by: Jean-Philippe Brucker --- include/linux/pci-ats.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/pci-ats.h b/include/linux/pci-ats.h index f75c307f346de..e9e266df9b37c 100644 --- a/include/linux/pci-ats.h +++ b/include/linux/pci-ats.h @@ -28,6 +28,14 @@ int pci_enable_pri(struct pci_dev *pdev, u32 reqs); void pci_disable_pri(struct pci_dev *pdev); int pci_reset_pri(struct pci_dev *pdev); int pci_prg_resp_pasid_required(struct pci_dev *pdev); +#else /* CONFIG_PCI_PRI */ +static inline int pci_enable_pri(struct pci_dev *pdev, u32 reqs) +{ return -ENODEV; } +static inline void pci_disable_pri(struct pci_dev *pdev) { } +static inline int pci_reset_pri(struct pci_dev *pdev) +{ return -ENODEV; } +static inline int pci_prg_resp_pasid_required(struct pci_dev *pdev) +{ return 0; } #endif /* CONFIG_PCI_PRI */ #ifdef CONFIG_PCI_PASID