linux-kernel - [PATCH v2 03/15] vfio/mlx5: Use the new device life cycle helpers

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Date:   Thu,  1 Sep 2022 22:37:35 +0800
From:   Kevin Tian <kevin.tian@...el.com>
To:     Zhenyu Wang <zhenyuw@...ux.intel.com>,
        Zhi Wang <zhi.a.wang@...el.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Tvrtko Ursulin <tvrtko.ursulin@...ux.intel.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Eric Farman <farman@...ux.ibm.com>,
        Matthew Rosato <mjrosato@...ux.ibm.com>,
        Halil Pasic <pasic@...ux.ibm.com>,
        Vineeth Vijayan <vneethv@...ux.ibm.com>,
        Peter Oberparleiter <oberpar@...ux.ibm.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        Tony Krowiak <akrowiak@...ux.ibm.com>,
        Jason Herne <jjherne@...ux.ibm.com>,
        Harald Freudenberger <freude@...ux.ibm.com>,
        Diana Craciun <diana.craciun@....nxp.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Cornelia Huck <cohuck@...hat.com>,
        Longfang Liu <liulongfang@...wei.com>,
        Shameer Kolothum <shameerali.kolothum.thodi@...wei.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Yishai Hadas <yishaih@...dia.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Eric Auger <eric.auger@...hat.com>,
        Kirti Wankhede <kwankhede@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        Abhishek Sahu <abhsahu@...dia.com>,
        intel-gvt-dev@...ts.freedesktop.org,
        intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     Yi Liu <yi.l.liu@...el.com>
Subject: [PATCH v2 03/15] vfio/mlx5: Use the new device life cycle helpers

From: Yi Liu <yi.l.liu@...el.com>

mlx5 has its own @init/@...ease for handling migration cap.

Signed-off-by: Yi Liu <yi.l.liu@...el.com>
Signed-off-by: Kevin Tian <kevin.tian@...el.com>
Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
---
 drivers/vfio/pci/mlx5/main.c | 49 ++++++++++++++++++++++++++----------
 1 file changed, 36 insertions(+), 13 deletions(-)

diff --git a/drivers/vfio/pci/mlx5/main.c b/drivers/vfio/pci/mlx5/main.c
index a9b63d15c5d3..168c1133e337 100644
--- a/drivers/vfio/pci/mlx5/main.c
+++ b/drivers/vfio/pci/mlx5/main.c
@@ -579,8 +579,35 @@ static const struct vfio_migration_ops mlx5vf_pci_mig_ops = {
 	.migration_get_state = mlx5vf_pci_get_device_state,
 };
 
+static int mlx5vf_pci_init_dev(struct vfio_device *core_vdev)
+{
+	struct mlx5vf_pci_core_device *mvdev = container_of(core_vdev,
+			struct mlx5vf_pci_core_device, core_device.vdev);
+	int ret;
+
+	ret = vfio_pci_core_init_dev(core_vdev);
+	if (ret)
+		return ret;
+
+	mlx5vf_cmd_set_migratable(mvdev, &mlx5vf_pci_mig_ops);
+
+	return 0;
+
+}
+
+static void mlx5vf_pci_release_dev(struct vfio_device *core_vdev)
+{
+	struct mlx5vf_pci_core_device *mvdev = container_of(core_vdev,
+			struct mlx5vf_pci_core_device, core_device.vdev);
+
+	mlx5vf_cmd_remove_migratable(mvdev);
+	vfio_pci_core_release_dev(core_vdev);
+}
+
 static const struct vfio_device_ops mlx5vf_pci_ops = {
 	.name = "mlx5-vfio-pci",
+	.init = mlx5vf_pci_init_dev,
+	.release = mlx5vf_pci_release_dev,
 	.open_device = mlx5vf_pci_open_device,
 	.close_device = mlx5vf_pci_close_device,
 	.ioctl = vfio_pci_core_ioctl,
@@ -598,21 +625,19 @@ static int mlx5vf_pci_probe(struct pci_dev *pdev,
 	struct mlx5vf_pci_core_device *mvdev;
 	int ret;
 
-	mvdev = kzalloc(sizeof(*mvdev), GFP_KERNEL);
-	if (!mvdev)
-		return -ENOMEM;
-	vfio_pci_core_init_device(&mvdev->core_device, pdev, &mlx5vf_pci_ops);
-	mlx5vf_cmd_set_migratable(mvdev, &mlx5vf_pci_mig_ops);
+	mvdev = vfio_alloc_device(mlx5vf_pci_core_device, core_device.vdev,
+				  &pdev->dev, &mlx5vf_pci_ops);
+	if (IS_ERR(mvdev))
+		return PTR_ERR(mvdev);
+
 	dev_set_drvdata(&pdev->dev, &mvdev->core_device);
 	ret = vfio_pci_core_register_device(&mvdev->core_device);
 	if (ret)
-		goto out_free;
+		goto out_put_vdev;
 	return 0;
 
-out_free:
-	mlx5vf_cmd_remove_migratable(mvdev);
-	vfio_pci_core_uninit_device(&mvdev->core_device);
-	kfree(mvdev);
+out_put_vdev:
+	vfio_put_device(&mvdev->core_device.vdev);
 	return ret;
 }
 
@@ -621,9 +646,7 @@ static void mlx5vf_pci_remove(struct pci_dev *pdev)
 	struct mlx5vf_pci_core_device *mvdev = mlx5vf_drvdata(pdev);
 
 	vfio_pci_core_unregister_device(&mvdev->core_device);
-	mlx5vf_cmd_remove_migratable(mvdev);
-	vfio_pci_core_uninit_device(&mvdev->core_device);
-	kfree(mvdev);
+	vfio_put_device(&mvdev->core_device.vdev);
 }
 
 static const struct pci_device_id mlx5vf_pci_table[] = {
-- 
2.21.3