[PATCH v3 04/15] vfio/hisi_acc: Use the new device life cycle helpers

Kevin Tian
2022-09-09T03:06:35Z

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

Tidy up @probe so all migration specific initialization logic is moved
to migration specific @init callback.

Remove vfio_pci_core_{un}init_device() given no user now.

Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
.../vfio/pci/hisilicon/hisi_acc_vfio_pci.c | 80 +++++++++----------
drivers/vfio/pci/vfio_pci_core.c | 30 -------
include/linux/vfio_pci_core.h | 4 -
3 files changed, 37 insertions(+), 77 deletions(-)

diff --git a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
index 258cae0863ea..47174e2b61bd 100644
--- a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
+++ b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
@@ -1213,8 +1213,28 @@ static const struct vfio_migration_ops hisi_acc_vfio_pci_migrn_state_ops = {
.migration_get_state = hisi_acc_vfio_pci_get_device_state,
};

+static int hisi_acc_vfio_pci_migrn_init_dev(struct vfio_device *core_vdev)
+{
+ struct hisi_acc_vf_core_device *hisi_acc_vdev = container_of(core_vdev,
+ struct hisi_acc_vf_core_device, core_device.vdev);
+ struct pci_dev *pdev = to_pci_dev(core_vdev->dev);
+ struct hisi_qm *pf_qm = hisi_acc_get_pf_qm(pdev);
+
+ hisi_acc_vdev->vf_id = pci_iov_vf_id(pdev) + 1;
+ hisi_acc_vdev->pf_qm = pf_qm;
+ hisi_acc_vdev->vf_dev = pdev;
+ mutex_init(&hisi_acc_vdev->state_mutex);
+
+ core_vdev->migration_flags = VFIO_MIGRATION_STOP_COPY;
+ core_vdev->mig_ops = &hisi_acc_vfio_pci_migrn_state_ops;
+
+ return vfio_pci_core_init_dev(core_vdev);
+}
+
static const struct vfio_device_ops hisi_acc_vfio_pci_migrn_ops = {
.name = "hisi-acc-vfio-pci-migration",
+ .init = hisi_acc_vfio_pci_migrn_init_dev,
+ .release = vfio_pci_core_release_dev,
.open_device = hisi_acc_vfio_pci_open_device,
.close_device = hisi_acc_vfio_pci_close_device,
.ioctl = hisi_acc_vfio_pci_ioctl,
@@ -1228,6 +1248,8 @@ static const struct vfio_device_ops hisi_acc_vfio_pci_migrn_ops = {

static const struct vfio_device_ops hisi_acc_vfio_pci_ops = {
.name = "hisi-acc-vfio-pci",
+ .init = vfio_pci_core_init_dev,
+ .release = vfio_pci_core_release_dev,
.open_device = hisi_acc_vfio_pci_open_device,
.close_device = vfio_pci_core_close_device,
.ioctl = vfio_pci_core_ioctl,
@@ -1239,63 +1261,36 @@ static const struct vfio_device_ops hisi_acc_vfio_pci_ops = {
.match = vfio_pci_core_match,
};

-static int
-hisi_acc_vfio_pci_migrn_init(struct hisi_acc_vf_core_device *hisi_acc_vdev,
- struct pci_dev *pdev, struct hisi_qm *pf_qm)
-{
- int vf_id;
-
- vf_id = pci_iov_vf_id(pdev);
- if (vf_id < 0)
- return vf_id;
-
- hisi_acc_vdev->vf_id = vf_id + 1;
- hisi_acc_vdev->core_device.vdev.migration_flags =
- VFIO_MIGRATION_STOP_COPY;
- hisi_acc_vdev->pf_qm = pf_qm;
- hisi_acc_vdev->vf_dev = pdev;
- mutex_init(&hisi_acc_vdev->state_mutex);
-
- return 0;
-}
-
static int hisi_acc_vfio_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct hisi_acc_vf_core_device *hisi_acc_vdev;
+ const struct vfio_device_ops *ops = &hisi_acc_vfio_pci_ops;
struct hisi_qm *pf_qm;
+ int vf_id;
int ret;

- hisi_acc_vdev = kzalloc(sizeof(*hisi_acc_vdev), GFP_KERNEL);
- if (!hisi_acc_vdev)
- return -ENOMEM;
-
pf_qm = hisi_acc_get_pf_qm(pdev);
if (pf_qm && pf_qm->ver >= QM_HW_V3) {
- ret = hisi_acc_vfio_pci_migrn_init(hisi_acc_vdev, pdev, pf_qm);
- if (!ret) {
- vfio_pci_core_init_device(&hisi_acc_vdev->core_device, pdev,
- &hisi_acc_vfio_pci_migrn_ops);
- hisi_acc_vdev->core_device.vdev.mig_ops =
- &hisi_acc_vfio_pci_migrn_state_ops;
- } else {
+ vf_id = pci_iov_vf_id(pdev);
+ if (vf_id >= 0)
+ ops = &hisi_acc_vfio_pci_migrn_ops;
+ else
pci_warn(pdev, "migration support failed, continue with generic interface\n");
- vfio_pci_core_init_device(&hisi_acc_vdev->core_device, pdev,
- &hisi_acc_vfio_pci_ops);
- }
- } else {
- vfio_pci_core_init_device(&hisi_acc_vdev->core_device, pdev,
- &hisi_acc_vfio_pci_ops);
}

+ hisi_acc_vdev = vfio_alloc_device(hisi_acc_vf_core_device,
+ core_device.vdev, &pdev->dev, ops);
+ if (IS_ERR(hisi_acc_vdev))
+ return PTR_ERR(hisi_acc_vdev);
+
dev_set_drvdata(&pdev->dev, &hisi_acc_vdev->core_device);
ret = vfio_pci_core_register_device(&hisi_acc_vdev->core_device);
if (ret)
- goto out_free;
+ goto out_put_vdev;
return 0;

-out_free:
- vfio_pci_core_uninit_device(&hisi_acc_vdev->core_device);
- kfree(hisi_acc_vdev);
+out_put_vdev:
+ vfio_put_device(&hisi_acc_vdev->core_device.vdev);
return ret;
}

@@ -1304,8 +1299,7 @@ static void hisi_acc_vfio_pci_remove(struct pci_dev *pdev)
struct hisi_acc_vf_core_device *hisi_acc_vdev = hisi_acc_drvdata(pdev);

vfio_pci_core_unregister_device(&hisi_acc_vdev->core_device);
- vfio_pci_core_uninit_device(&hisi_acc_vdev->core_device);
- kfree(hisi_acc_vdev);
+ vfio_put_device(&hisi_acc_vdev->core_device.vdev);
}

static const struct pci_device_id hisi_acc_vfio_pci_table[] = {
diff --git a/drivers/vfio/pci/vfio_pci_core.c b/drivers/vfio/pci/vfio_pci_core.c
index 77d33739c6e8..59a28251bb0b 100644
--- a/drivers/vfio/pci/vfio_pci_core.c
+++ b/drivers/vfio/pci/vfio_pci_core.c
@@ -2113,36 +2113,6 @@ void vfio_pci_core_release_dev(struct vfio_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)
-{
- vfio_init_group_dev(&vdev->vdev, &pdev->dev, vfio_pci_ops);
- vdev->pdev = pdev;
- 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);
-}
-EXPORT_SYMBOL_GPL(vfio_pci_core_init_device);
-
-void vfio_pci_core_uninit_device(struct vfio_pci_core_device *vdev)
-{
- mutex_destroy(&vdev->igate);
- mutex_destroy(&vdev->ioeventfds_lock);
- mutex_destroy(&vdev->vma_lock);
- vfio_uninit_group_dev(&vdev->vdev);
- kfree(vdev->region);
- kfree(vdev->pm_save);
-}
-EXPORT_SYMBOL_GPL(vfio_pci_core_uninit_device);
-
int vfio_pci_core_register_device(struct vfio_pci_core_device *vdev)
{
struct pci_dev *pdev = vdev->pdev;
diff --git a/include/linux/vfio_pci_core.h b/include/linux/vfio_pci_core.h
index 0499ea836058..367fd79226a3 100644
--- a/include/linux/vfio_pci_core.h
+++ b/include/linux/vfio_pci_core.h
@@ -106,13 +106,9 @@ int vfio_pci_core_register_dev_region(struct vfio_pci_core_device *vdev,
void vfio_pci_core_set_params(bool nointxmask, bool is_disable_vga,
bool is_disable_idle_d3);
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);
extern const struct pci_error_handlers vfio_pci_core_err_handlers;
int vfio_pci_core_sriov_configure(struct vfio_pci_core_device *vdev,
--
2.21.3