On Thu, May 4, 2023 at 2:13 AM Shannon Nelson <shannon.nelson@xxxxxxx> wrote:
>
> Prep and use the "modern" virtio bar utilities to get our
> virtio config space ready.
>
> Signed-off-by: Shannon Nelson <shannon.nelson@xxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
Thanks
> ---
> drivers/vdpa/pds/aux_drv.c | 25 +++++++++++++++++++++++++
> drivers/vdpa/pds/aux_drv.h | 3 +++
> 2 files changed, 28 insertions(+)
>
> diff --git a/drivers/vdpa/pds/aux_drv.c b/drivers/vdpa/pds/aux_drv.c
> index aa748cf55d2b..0c4a135b1484 100644
> --- a/drivers/vdpa/pds/aux_drv.c
> +++ b/drivers/vdpa/pds/aux_drv.c
> @@ -4,6 +4,7 @@
> #include <linux/auxiliary_bus.h>
> #include <linux/pci.h>
> #include <linux/vdpa.h>
> +#include <linux/virtio_pci_modern.h>
>
> #include <linux/pds/pds_common.h>
> #include <linux/pds/pds_core_if.h>
> @@ -19,12 +20,22 @@ static const struct auxiliary_device_id pds_vdpa_id_table[] = {
> {},
> };
>
> +static int pds_vdpa_device_id_check(struct pci_dev *pdev)
> +{
> + if (pdev->device != PCI_DEVICE_ID_PENSANDO_VDPA_VF ||
> + pdev->vendor != PCI_VENDOR_ID_PENSANDO)
> + return -ENODEV;
> +
> + return PCI_DEVICE_ID_PENSANDO_VDPA_VF;
> +}
> +
> static int pds_vdpa_probe(struct auxiliary_device *aux_dev,
> const struct auxiliary_device_id *id)
>
> {
> struct pds_auxiliary_dev *padev =
> container_of(aux_dev, struct pds_auxiliary_dev, aux_dev);
> + struct device *dev = &aux_dev->dev;
> struct pds_vdpa_aux *vdpa_aux;
> int err;
>
> @@ -41,8 +52,21 @@ static int pds_vdpa_probe(struct auxiliary_device *aux_dev,
> if (err)
> goto err_free_mem;
>
> + /* Find the virtio configuration */
> + vdpa_aux->vd_mdev.pci_dev = padev->vf_pdev;
> + vdpa_aux->vd_mdev.device_id_check = pds_vdpa_device_id_check;
> + vdpa_aux->vd_mdev.dma_mask = DMA_BIT_MASK(PDS_CORE_ADDR_LEN);
> + err = vp_modern_probe(&vdpa_aux->vd_mdev);
> + if (err) {
> + dev_err(dev, "Unable to probe for virtio configuration: %pe\n",
> + ERR_PTR(err));
> + goto err_free_mgmt_info;
> + }
> +
> return 0;
>
> +err_free_mgmt_info:
> + pci_free_irq_vectors(padev->vf_pdev);
> err_free_mem:
> kfree(vdpa_aux);
> auxiliary_set_drvdata(aux_dev, NULL);
> @@ -55,6 +79,7 @@ static void pds_vdpa_remove(struct auxiliary_device *aux_dev)
> struct pds_vdpa_aux *vdpa_aux = auxiliary_get_drvdata(aux_dev);
> struct device *dev = &aux_dev->dev;
>
> + vp_modern_remove(&vdpa_aux->vd_mdev);
> pci_free_irq_vectors(vdpa_aux->padev->vf_pdev);
>
> kfree(vdpa_aux);
> diff --git a/drivers/vdpa/pds/aux_drv.h b/drivers/vdpa/pds/aux_drv.h
> index dcec782e79eb..99e0ff340bfa 100644
> --- a/drivers/vdpa/pds/aux_drv.h
> +++ b/drivers/vdpa/pds/aux_drv.h
> @@ -4,6 +4,8 @@
> #ifndef _AUX_DRV_H_
> #define _AUX_DRV_H_
>
> +#include <linux/virtio_pci_modern.h>
> +
> #define PDS_VDPA_DRV_DESCRIPTION "AMD/Pensando vDPA VF Device Driver"
> #define PDS_VDPA_DRV_NAME KBUILD_MODNAME
>
> @@ -16,6 +18,7 @@ struct pds_vdpa_aux {
>
> int vf_id;
> struct dentry *dentry;
> + struct virtio_pci_modern_device vd_mdev;
>
> int nintrs;
> };
> --
> 2.17.1
>
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