From: Jean-Philippe Brucker <jean-philippe@linaro.org>
To: joro@8bytes.org, will@kernel.org, lorenzo.pieralisi@arm.com,
robh+dt@kernel.org
Cc: guohanjun@huawei.com, sudeep.holla@arm.com, rjw@rjwysocki.net,
lenb@kernel.org, robin.murphy@arm.com, bhelgaas@google.com,
Jonathan.Cameron@huawei.com, eric.auger@redhat.com,
iommu@lists.linux-foundation.org, devicetree@vger.kernel.org,
linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-pci@vger.kernel.org, baolu.lu@linux.intel.com,
zhangfei.gao@linaro.org, shameerali.kolothum.thodi@huawei.com,
vivek.gautam@arm.com,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@linux.intel.com>
Subject: [PATCH v8 7/9] PCI/ATS: Add PRI stubs
Date: Thu, 12 Nov 2020 13:55:19 +0100 [thread overview]
Message-ID: <20201112125519.3987595-8-jean-philippe@linaro.org> (raw)
In-Reply-To: <20201112125519.3987595-1-jean-philippe@linaro.org>
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 <bhelgaas@google.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
---
include/linux/pci-ats.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/linux/pci-ats.h b/include/linux/pci-ats.h
index df54cd5b15db..ccfca09fd232 100644
--- a/include/linux/pci-ats.h
+++ b/include/linux/pci-ats.h
@@ -30,6 +30,13 @@ int pci_reset_pri(struct pci_dev *pdev);
int pci_prg_resp_pasid_required(struct pci_dev *pdev);
bool pci_pri_supported(struct pci_dev *pdev);
#else
+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; }
static inline bool pci_pri_supported(struct pci_dev *pdev)
{ return false; }
#endif /* CONFIG_PCI_PRI */
--
2.29.1
next prev parent reply other threads:[~2020-11-12 13:03 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-12 12:55 [PATCH v8 0/9] iommu: I/O page faults for SMMUv3 Jean-Philippe Brucker
2020-11-12 12:55 ` [PATCH v8 1/9] iommu: Add a page fault handler Jean-Philippe Brucker
2020-11-12 12:55 ` [PATCH v8 2/9] iommu/arm-smmu-v3: Maintain a SID->device structure Jean-Philippe Brucker
2020-11-12 12:55 ` [PATCH v8 3/9] dt-bindings: document stall property for IOMMU masters Jean-Philippe Brucker
2020-11-12 12:55 ` [PATCH v8 4/9] of/iommu: Support dma-can-stall property Jean-Philippe Brucker
2020-11-26 18:09 ` Robin Murphy
2020-12-14 12:51 ` Jean-Philippe Brucker
2020-12-18 6:47 ` Zhangfei Gao
2020-11-12 12:55 ` [PATCH v8 5/9] ACPI/IORT: Enable stall support for platform devices Jean-Philippe Brucker
2020-11-13 0:41 ` Hanjun Guo
2020-11-12 12:55 ` [PATCH v8 6/9] iommu/arm-smmu-v3: Add " Jean-Philippe Brucker
2020-11-12 12:55 ` Jean-Philippe Brucker [this message]
2020-11-12 12:55 ` [PATCH v8 8/9] PCI/ATS: Export PRI functions Jean-Philippe Brucker
2020-11-12 12:55 ` [PATCH v8 9/9] iommu/arm-smmu-v3: Add support for PRI Jean-Philippe Brucker
2020-12-03 6:52 ` [PATCH v8 0/9] iommu: I/O page faults for SMMUv3 Vivek Gautam
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