[PATCH v3 02/15] vfio/pci: Use the new device life cycle helpers

[Kevin Tian]

From: Yi Liu <yi.l....@intel.com>

Also introduce two pci core helpers as @init/@release for pci drivers:

 - vfio_pci_core_init_dev()
 - vfio_pci_core_release_dev()

Signed-off-by: Yi Liu <yi.l....@intel.com>
Signed-off-by: Kevin Tian <kevin.t...@intel.com>
Reviewed-by: Jason Gunthorpe <j...@nvidia.com>
---
 drivers/vfio/pci/vfio_pci.c      | 20 +++++++++---------
 drivers/vfio/pci/vfio_pci_core.c | 35 ++++++++++++++++++++++++++++++++
 include/linux/vfio_pci_core.h    |  2 ++
 3 files changed, 47 insertions(+), 10 deletions(-)

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index d9b5c03f8d5b..1d4919edfbde 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -127,6 +127,8 @@ static int vfio_pci_open_device(struct vfio_device 
*core_vdev)
 
 static const struct vfio_device_ops vfio_pci_ops = {
        .name           = "vfio-pci",
+       .init           = vfio_pci_core_init_dev,
+       .release        = vfio_pci_core_release_dev,
        .open_device    = vfio_pci_open_device,
        .close_device   = vfio_pci_core_close_device,
        .ioctl          = vfio_pci_core_ioctl,
@@ -146,20 +148,19 @@ static int vfio_pci_probe(struct pci_dev *pdev, const 
struct pci_device_id *id)
        if (vfio_pci_is_denylisted(pdev))
                return -EINVAL;
 
-       vdev = kzalloc(sizeof(*vdev), GFP_KERNEL);
-       if (!vdev)
-               return -ENOMEM;
-       vfio_pci_core_init_device(vdev, pdev, &vfio_pci_ops);
+       vdev = vfio_alloc_device(vfio_pci_core_device, vdev, &pdev->dev,
+                                &vfio_pci_ops);
+       if (IS_ERR(vdev))
+               return PTR_ERR(vdev);
 
        dev_set_drvdata(&pdev->dev, vdev);
        ret = vfio_pci_core_register_device(vdev);
        if (ret)
-               goto out_free;
+               goto out_put_vdev;
        return 0;
 
-out_free:
-       vfio_pci_core_uninit_device(vdev);
-       kfree(vdev);
+out_put_vdev:
+       vfio_put_device(&vdev->vdev);
        return ret;
 }
 
@@ -168,8 +169,7 @@ static void vfio_pci_remove(struct pci_dev *pdev)
        struct vfio_pci_core_device *vdev = dev_get_drvdata(&pdev->dev);
 
        vfio_pci_core_unregister_device(vdev);
-       vfio_pci_core_uninit_device(vdev);
-       kfree(vdev);
+       vfio_put_device(&vdev->vdev);
 }
 
 static int vfio_pci_sriov_configure(struct pci_dev *pdev, int nr_virtfn)
diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c
index 0a801aee2f2d..77d33739c6e8 100644
--- a/drivers/vfio/pci/vfio_pci_core.c
+++ b/drivers/vfio/pci/vfio_pci_core.c
@@ -2078,6 +2078,41 @@ static void vfio_pci_vga_uninit(struct 
vfio_pci_core_device *vdev)
                                              VGA_RSRC_LEGACY_MEM);
 }
 
+int vfio_pci_core_init_dev(struct vfio_device *core_vdev)
+{
+       struct vfio_pci_core_device *vdev =
+               container_of(core_vdev, struct vfio_pci_core_device, vdev);
+
+       vdev->pdev = to_pci_dev(core_vdev->dev);
+       vdev->irq_type = VFIO_PCI_NUM_IRQS;
+       mutex_init(&vdev->igate);
+       spin_lock_init(&vdev->irqlock);
+       mutex_init(&vdev->ioeventfds_lock);
+       INIT_LIST_HEAD(&vdev->dummy_resources_list);
+       INIT_LIST_HEAD(&vdev->ioeventfds_list);
+       mutex_init(&vdev->vma_lock);
+       INIT_LIST_HEAD(&vdev->vma_list);
+       INIT_LIST_HEAD(&vdev->sriov_pfs_item);
+       init_rwsem(&vdev->memory_lock);
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(vfio_pci_core_init_dev);
+
+void vfio_pci_core_release_dev(struct vfio_device *core_vdev)
+{
+       struct vfio_pci_core_device *vdev =
+               container_of(core_vdev, struct vfio_pci_core_device, vdev);
+
+       mutex_destroy(&vdev->igate);
+       mutex_destroy(&vdev->ioeventfds_lock);
+       mutex_destroy(&vdev->vma_lock);
+       kfree(vdev->region);
+       kfree(vdev->pm_save);
+       vfio_free_device(core_vdev);
+}
+EXPORT_SYMBOL_GPL(vfio_pci_core_release_dev);
+
 void vfio_pci_core_init_device(struct vfio_pci_core_device *vdev,
                               struct pci_dev *pdev,
                               const struct vfio_device_ops *vfio_pci_ops)
diff --git a/include/linux/vfio_pci_core.h b/include/linux/vfio_pci_core.h
index 089b603bcfdc..0499ea836058 100644
--- a/include/linux/vfio_pci_core.h
+++ b/include/linux/vfio_pci_core.h
@@ -109,6 +109,8 @@ void vfio_pci_core_close_device(struct vfio_device 
*core_vdev);
 void vfio_pci_core_init_device(struct vfio_pci_core_device *vdev,
                               struct pci_dev *pdev,
                               const struct vfio_device_ops *vfio_pci_ops);
+int vfio_pci_core_init_dev(struct vfio_device *core_vdev);
+void vfio_pci_core_release_dev(struct vfio_device *core_vdev);
 int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev);
 void vfio_pci_core_uninit_device(struct vfio_pci_core_device *vdev);
 void vfio_pci_core_unregister_device(struct vfio_pci_core_device *vdev);
-- 
2.21.3