linux-kernel - [PATCH 13/30] iommu/amd: deprecate pci_get_bus_and

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Message-Id: <1511328675-21981-14-git-send-email-okaya@codeaurora.org>
Date:   Wed, 22 Nov 2017 00:30:58 -0500
From:   Sinan Kaya <okaya@...eaurora.org>
To:     linux-pci@...r.kernel.org, timur@...eaurora.org
Cc:     linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Sinan Kaya <okaya@...eaurora.org>,
        Joerg Roedel <joro@...tes.org>,
        iommu@...ts.linux-foundation.org (open list:AMD IOMMU (AMD-VI)),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 13/30] iommu/amd: deprecate pci_get_bus_and_slot()

pci_get_bus_and_slot() is restrictive such that it assumes domain=0 as
where a PCI device is present. This restricts the device drivers to be
reused for other domain numbers.

Use pci_get_domain_bus_and_slot() with a domain number of 0 where we can't
extract the domain number. Other places, use the actual domain number from
the device.

Signed-off-by: Sinan Kaya <okaya@...eaurora.org>
---
 drivers/iommu/amd_iommu.c      |  3 ++-
 drivers/iommu/amd_iommu_init.c | 10 ++++++----
 drivers/iommu/amd_iommu_v2.c   |  3 ++-
 3 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 8e8874d..2c3452f 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -528,7 +528,8 @@ static void amd_iommu_report_page_fault(u16 devid, u16 domain_id,
 	struct iommu_dev_data *dev_data = NULL;
 	struct pci_dev *pdev;
 
-	pdev = pci_get_bus_and_slot(PCI_BUS_NUM(devid), devid & 0xff);
+	pdev = pci_get_domain_bus_and_slot(0, PCI_BUS_NUM(devid),
+					   devid & 0xff);
 	if (pdev)
 		dev_data = get_dev_data(&pdev->dev);
 
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 6fe2d03..8d159ff 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1697,8 +1697,8 @@ static int iommu_init_pci(struct amd_iommu *iommu)
 	u32 range, misc, low, high;
 	int ret;
 
-	iommu->dev = pci_get_bus_and_slot(PCI_BUS_NUM(iommu->devid),
-					  iommu->devid & 0xff);
+	iommu->dev = pci_get_domain_bus_and_slot(0, PCI_BUS_NUM(iommu->devid),
+						 iommu->devid & 0xff);
 	if (!iommu->dev)
 		return -ENODEV;
 
@@ -1763,9 +1763,11 @@ static int iommu_init_pci(struct amd_iommu *iommu)
 
 	if (is_rd890_iommu(iommu->dev)) {
 		int i, j;
+		u16 busnr = iommu->dev->bus->number;
+		u16 devfn = PCI_DEVFN(0, 0);
 
-		iommu->root_pdev = pci_get_bus_and_slot(iommu->dev->bus->number,
-				PCI_DEVFN(0, 0));
+		iommu->root_pdev = pci_get_domain_bus_and_slot(0, busnr,
+							       devfn);
 
 		/*
 		 * Some rd890 systems may not be fully reconfigured by the
diff --git a/drivers/iommu/amd_iommu_v2.c b/drivers/iommu/amd_iommu_v2.c
index 7d94e1d..8696382 100644
--- a/drivers/iommu/amd_iommu_v2.c
+++ b/drivers/iommu/amd_iommu_v2.c
@@ -564,7 +564,8 @@ static int ppr_notifier(struct notifier_block *nb, unsigned long e, void *data)
 	finish      = (iommu_fault->tag >> 9) & 1;
 
 	devid = iommu_fault->device_id;
-	pdev = pci_get_bus_and_slot(PCI_BUS_NUM(devid), devid & 0xff);
+	pdev = pci_get_domain_bus_and_slot(0, PCI_BUS_NUM(devid),
+					   devid & 0xff);
 	if (!pdev)
 		return -ENODEV;
 	dev_data = get_dev_data(&pdev->dev);
-- 
1.9.1