Jason Wang
2021-Mar-17 03:57 UTC
[PATCH V4 5/7] vDPA/ifcvf: fetch device feature bits when probe
? 2021/3/15 ??3:44, Zhu Lingshan ??:> This commit would read and store device feature > bits when probe. > > rename ifcvf_get_features() to ifcvf_get_hw_features(), > it reads and stores features of the probed device. > > new ifcvf_get_features() simply returns stored > feature bits. > > Signed-off-by: Zhu Lingshan <lingshan.zhu at intel.com>Acked-by: Jason Wang <jasowang at redhat.com>> --- > drivers/vdpa/ifcvf/ifcvf_base.c | 12 ++++++++++-- > drivers/vdpa/ifcvf/ifcvf_base.h | 2 ++ > drivers/vdpa/ifcvf/ifcvf_main.c | 2 ++ > 3 files changed, 14 insertions(+), 2 deletions(-) > > diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c > index f2a128e56de5..ea6a78791c9b 100644 > --- a/drivers/vdpa/ifcvf/ifcvf_base.c > +++ b/drivers/vdpa/ifcvf/ifcvf_base.c > @@ -202,10 +202,11 @@ static void ifcvf_add_status(struct ifcvf_hw *hw, u8 status) > ifcvf_get_status(hw); > } > > -u64 ifcvf_get_features(struct ifcvf_hw *hw) > +u64 ifcvf_get_hw_features(struct ifcvf_hw *hw) > { > struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg; > u32 features_lo, features_hi; > + u64 features; > > ifc_iowrite32(0, &cfg->device_feature_select); > features_lo = ifc_ioread32(&cfg->device_feature); > @@ -213,7 +214,14 @@ u64 ifcvf_get_features(struct ifcvf_hw *hw) > ifc_iowrite32(1, &cfg->device_feature_select); > features_hi = ifc_ioread32(&cfg->device_feature); > > - return ((u64)features_hi << 32) | features_lo; > + features = ((u64)features_hi << 32) | features_lo; > + > + return features; > +} > + > +u64 ifcvf_get_features(struct ifcvf_hw *hw) > +{ > + return hw->hw_features; > } > > void ifcvf_read_net_config(struct ifcvf_hw *hw, u64 offset, > diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h > index 794d1505d857..dbb8c10aa3b1 100644 > --- a/drivers/vdpa/ifcvf/ifcvf_base.h > +++ b/drivers/vdpa/ifcvf/ifcvf_base.h > @@ -83,6 +83,7 @@ struct ifcvf_hw { > void __iomem *notify_base; > u32 notify_off_multiplier; > u64 req_features; > + u64 hw_features; > struct virtio_pci_common_cfg __iomem *common_cfg; > void __iomem *net_cfg; > struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2]; > @@ -121,6 +122,7 @@ void ifcvf_set_status(struct ifcvf_hw *hw, u8 status); > void io_write64_twopart(u64 val, u32 *lo, u32 *hi); > void ifcvf_reset(struct ifcvf_hw *hw); > u64 ifcvf_get_features(struct ifcvf_hw *hw); > +u64 ifcvf_get_hw_features(struct ifcvf_hw *hw); > u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid); > int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num); > struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw); > diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c > index c34e1eec6b6c..25fb9dfe23f0 100644 > --- a/drivers/vdpa/ifcvf/ifcvf_main.c > +++ b/drivers/vdpa/ifcvf/ifcvf_main.c > @@ -458,6 +458,8 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id) > for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) > vf->vring[i].irq = -EINVAL; > > + vf->hw_features = ifcvf_get_hw_features(vf); > + > ret = vdpa_register_device(&adapter->vdpa); > if (ret) { > IFCVF_ERR(pdev, "Failed to register ifcvf to vdpa bus");