linux-kernel - [PATCH 9/9] vfio/pci: use powernv naming instead of nvlink2

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Message-ID: <20210201162828.5938-10-mgurtovoy@nvidia.com>
Date:   Mon, 1 Feb 2021 16:28:28 +0000
From:   Max Gurtovoy <mgurtovoy@...dia.com>
To:     <jgg@...dia.com>, <cohuck@...hat.com>, <kvm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <alex.williamson@...hat.com>
CC:     <liranl@...dia.com>, <oren@...dia.com>, <tzahio@...dia.com>,
        <leonro@...dia.com>, <yarong@...dia.com>, <aviadye@...dia.com>,
        <shahafs@...dia.com>, <artemp@...dia.com>, <kwankhede@...dia.com>,
        <ACurrid@...dia.com>, <gmataev@...dia.com>, <cjia@...dia.com>,
        <mjrosato@...ux.ibm.com>, <yishaih@...dia.com>, <aik@...abs.ru>,
        Max Gurtovoy <mgurtovoy@...dia.com>
Subject: [PATCH 9/9] vfio/pci: use powernv naming instead of nvlink2

This patch doesn't change any logic but only align to the concept of
vfio_pci_core extensions. Extensions that are related to a platform
and not to a specific vendor of PCI devices should be part of the
core driver. Extensions that are specific for PCI device vendor should go
to a dedicated vendor vfio-pci driver.

For now, powernv extensions will include only nvlink2.

Signed-off-by: Max Gurtovoy <mgurtovoy@...dia.com>
---
 drivers/vfio/pci/Kconfig                                    | 6 ++++--
 drivers/vfio/pci/Makefile                                   | 2 +-
 drivers/vfio/pci/vfio_pci_core.c                            | 4 ++--
 drivers/vfio/pci/{vfio_pci_nvlink2.c => vfio_pci_powernv.c} | 0
 drivers/vfio/pci/vfio_pci_private.h                         | 2 +-
 5 files changed, 8 insertions(+), 6 deletions(-)
 rename drivers/vfio/pci/{vfio_pci_nvlink2.c => vfio_pci_powernv.c} (100%)

diff --git a/drivers/vfio/pci/Kconfig b/drivers/vfio/pci/Kconfig
index c98f2df01a60..fe0264b3d02f 100644
--- a/drivers/vfio/pci/Kconfig
+++ b/drivers/vfio/pci/Kconfig
@@ -47,11 +47,13 @@ config VFIO_PCI_X86
 
 	  To enable Intel X86 extensions for vfio-pci-core, say Y.
 
-config VFIO_PCI_NVLINK2
+config VFIO_PCI_POWERNV
 	def_bool y
 	depends on VFIO_PCI_CORE && PPC_POWERNV
 	help
-	  VFIO PCI support for P9 Witherspoon machine with NVIDIA V100 GPUs
+	  VFIO PCI extensions for IBM PowerNV (Non-Virtualized) platform
+
+	  To enable POWERNV extensions for vfio-pci-core, say Y.
 
 config VFIO_PCI_S390
 	bool "VFIO PCI extensions for S390 platform"
diff --git a/drivers/vfio/pci/Makefile b/drivers/vfio/pci/Makefile
index d8ccb70e015a..442b7c78de4c 100644
--- a/drivers/vfio/pci/Makefile
+++ b/drivers/vfio/pci/Makefile
@@ -6,7 +6,7 @@ obj-$(CONFIG_MLX5_VFIO_PCI) += mlx5-vfio-pci.o
 
 vfio-pci-core-y := vfio_pci_core.o vfio_pci_intrs.o vfio_pci_rdwr.o vfio_pci_config.o
 vfio-pci-core-$(CONFIG_VFIO_PCI_X86) += vfio_pci_x86.o
-vfio-pci-core-$(CONFIG_VFIO_PCI_NVLINK2) += vfio_pci_nvlink2.o
+vfio-pci-core-$(CONFIG_VFIO_PCI_POWERNV) += vfio_pci_powernv.o
 vfio-pci-core-$(CONFIG_VFIO_PCI_ZDEV) += vfio_pci_s390.o
 
 vfio-pci-y := vfio_pci.o
diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c
index e0e258c37fb5..90cc728fffc7 100644
--- a/drivers/vfio/pci/vfio_pci_core.c
+++ b/drivers/vfio/pci/vfio_pci_core.c
@@ -337,7 +337,7 @@ static int vfio_pci_enable(struct vfio_pci_device *vdev)
 	}
 
 	if (pdev->vendor == PCI_VENDOR_ID_NVIDIA &&
-	    IS_ENABLED(CONFIG_VFIO_PCI_NVLINK2)) {
+	    IS_ENABLED(CONFIG_VFIO_PCI_POWERNV)) {
 		ret = vfio_pci_nvdia_v100_nvlink2_init(vdev);
 		if (ret && ret != -ENODEV) {
 			pci_warn(pdev, "Failed to setup NVIDIA NV2 RAM region\n");
@@ -346,7 +346,7 @@ static int vfio_pci_enable(struct vfio_pci_device *vdev)
 	}
 
 	if (pdev->vendor == PCI_VENDOR_ID_IBM &&
-	    IS_ENABLED(CONFIG_VFIO_PCI_NVLINK2)) {
+	    IS_ENABLED(CONFIG_VFIO_PCI_POWERNV)) {
 		ret = vfio_pci_ibm_npu2_init(vdev);
 		if (ret && ret != -ENODEV) {
 			pci_warn(pdev, "Failed to setup NVIDIA NV2 ATSD region\n");
diff --git a/drivers/vfio/pci/vfio_pci_nvlink2.c b/drivers/vfio/pci/vfio_pci_powernv.c
similarity index 100%
rename from drivers/vfio/pci/vfio_pci_nvlink2.c
rename to drivers/vfio/pci/vfio_pci_powernv.c
diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h
index efc688525784..dc6a9191a704 100644
--- a/drivers/vfio/pci/vfio_pci_private.h
+++ b/drivers/vfio/pci/vfio_pci_private.h
@@ -173,7 +173,7 @@ static inline int vfio_pci_igd_init(struct vfio_pci_device *vdev)
 	return -ENODEV;
 }
 #endif
-#ifdef CONFIG_VFIO_PCI_NVLINK2
+#ifdef CONFIG_VFIO_PCI_POWERNV
 extern int vfio_pci_nvdia_v100_nvlink2_init(struct vfio_pci_device *vdev);
 extern int vfio_pci_ibm_npu2_init(struct vfio_pci_device *vdev);
 #else
-- 
2.25.4