> -----Original Message-----
> From: liulongfang <liulongfang@xxxxxxxxxx>
> Sent: Tuesday, July 30, 2024 1:15 PM
> To: alex.williamson@xxxxxxxxxx; jgg@xxxxxxxxxx; Shameerali Kolothum
> Thodi <shameerali.kolothum.thodi@xxxxxxxxxx>; Jonathan Cameron
> <jonathan.cameron@xxxxxxxxxx>
> Cc: kvm@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> linuxarm@xxxxxxxxxxxxx; liulongfang <liulongfang@xxxxxxxxxx>
> Subject: [PATCH v7 2/4] hisi_acc_vfio_pci: create subfunction for data
> reading
>
> This patch generates the code for the operation of reading data from
> the device into a sub-function.
> Then, it can be called during the device status data saving phase of
> the live migration process and the device status data reading function
> in debugfs.
> Thereby reducing the redundant code of the driver.
>
> Signed-off-by: Longfang Liu <liulongfang@xxxxxxxxxx>
> ---
LGTM,
Reviewed-by: Shameer Kolothum <shameerali.kolothum.thodi@xxxxxxxxxx>
Thanks,
Shameer
> .../vfio/pci/hisilicon/hisi_acc_vfio_pci.c | 54 +++++++++++--------
> 1 file changed, 33 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
> b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
> index 45351be8e270..a8c53952d82e 100644
> --- a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
> +++ b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
> @@ -486,31 +486,11 @@ static int vf_qm_load_data(struct
> hisi_acc_vf_core_device *hisi_acc_vdev,
> return 0;
> }
>
> -static int vf_qm_state_save(struct hisi_acc_vf_core_device *hisi_acc_vdev,
> - struct hisi_acc_vf_migration_file *migf)
> +static int vf_qm_read_data(struct hisi_qm *vf_qm, struct acc_vf_data
> *vf_data)
> {
> - struct acc_vf_data *vf_data = &migf->vf_data;
> - struct hisi_qm *vf_qm = &hisi_acc_vdev->vf_qm;
> struct device *dev = &vf_qm->pdev->dev;
> int ret;
>
> - if (unlikely(qm_wait_dev_not_ready(vf_qm))) {
> - /* Update state and return with match data */
> - vf_data->vf_qm_state = QM_NOT_READY;
> - hisi_acc_vdev->vf_qm_state = vf_data->vf_qm_state;
> - migf->total_length = QM_MATCH_SIZE;
> - return 0;
> - }
> -
> - vf_data->vf_qm_state = QM_READY;
> - hisi_acc_vdev->vf_qm_state = vf_data->vf_qm_state;
> -
> - ret = vf_qm_cache_wb(vf_qm);
> - if (ret) {
> - dev_err(dev, "failed to writeback QM Cache!\n");
> - return ret;
> - }
> -
> ret = qm_get_regs(vf_qm, vf_data);
> if (ret)
> return -EINVAL;
> @@ -536,6 +516,38 @@ static int vf_qm_state_save(struct
> hisi_acc_vf_core_device *hisi_acc_vdev,
> return -EINVAL;
> }
>
> + return 0;
> +}
> +
> +static int vf_qm_state_save(struct hisi_acc_vf_core_device *hisi_acc_vdev,
> + struct hisi_acc_vf_migration_file *migf)
> +{
> + struct acc_vf_data *vf_data = &migf->vf_data;
> + struct hisi_qm *vf_qm = &hisi_acc_vdev->vf_qm;
> + struct device *dev = &vf_qm->pdev->dev;
> + int ret;
> +
> + if (unlikely(qm_wait_dev_not_ready(vf_qm))) {
> + /* Update state and return with match data */
> + vf_data->vf_qm_state = QM_NOT_READY;
> + hisi_acc_vdev->vf_qm_state = vf_data->vf_qm_state;
> + migf->total_length = QM_MATCH_SIZE;
> + return 0;
> + }
> +
> + vf_data->vf_qm_state = QM_READY;
> + hisi_acc_vdev->vf_qm_state = vf_data->vf_qm_state;
> +
> + ret = vf_qm_cache_wb(vf_qm);
> + if (ret) {
> + dev_err(dev, "failed to writeback QM Cache!\n");
> + return ret;
> + }
> +
> + ret = vf_qm_read_data(vf_qm, vf_data);
> + if (ret)
> + return -EINVAL;
> +
> migf->total_length = sizeof(struct acc_vf_data);
> return 0;
> }
> --
> 2.24.0
