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Date: Wed, 14 Dec 2022 14:43:40 +0800
From: Jason Wang <jasowang@...hat.com>
To: Gautam Dawar <gautam.dawar@....com>
Cc: linux-net-drivers@....com, netdev@...r.kernel.org,
eperezma@...hat.com, tanuj.kamde@....com, Koushik.Dutta@....com,
harpreet.anand@....com, Edward Cree <ecree.xilinx@...il.com>,
Martin Habets <habetsm.xilinx@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 04/11] sfc: implement vDPA management device operations
On Wed, Dec 7, 2022 at 10:56 PM Gautam Dawar <gautam.dawar@....com> wrote:
>
> To allow vDPA device creation and deletion, add a vDPA management
> device per function. Currently, the vDPA devices can be created
> only on a VF. Also, for now only network class of vDPA devices
> are supported.
>
> Signed-off-by: Gautam Dawar <gautam.dawar@....com>
> ---
> drivers/net/ethernet/sfc/Makefile | 2 +-
> drivers/net/ethernet/sfc/ef10.c | 2 +-
> drivers/net/ethernet/sfc/ef100_nic.c | 24 ++-
> drivers/net/ethernet/sfc/ef100_nic.h | 11 +
> drivers/net/ethernet/sfc/ef100_vdpa.c | 232 ++++++++++++++++++++++
> drivers/net/ethernet/sfc/ef100_vdpa.h | 84 ++++++++
> drivers/net/ethernet/sfc/ef100_vdpa_ops.c | 28 +++
> drivers/net/ethernet/sfc/mcdi_functions.c | 9 +-
> drivers/net/ethernet/sfc/mcdi_functions.h | 3 +-
> drivers/net/ethernet/sfc/net_driver.h | 6 +
> 10 files changed, 394 insertions(+), 7 deletions(-)
> create mode 100644 drivers/net/ethernet/sfc/ef100_vdpa_ops.c
>
> diff --git a/drivers/net/ethernet/sfc/Makefile b/drivers/net/ethernet/sfc/Makefile
> index 84c9f0590368..a10eac91ab23 100644
> --- a/drivers/net/ethernet/sfc/Makefile
> +++ b/drivers/net/ethernet/sfc/Makefile
> @@ -11,7 +11,7 @@ sfc-$(CONFIG_SFC_MTD) += mtd.o
> sfc-$(CONFIG_SFC_SRIOV) += sriov.o ef10_sriov.o ef100_sriov.o ef100_rep.o \
> mae.o tc.o tc_bindings.o tc_counters.o
>
> -sfc-$(CONFIG_SFC_VDPA) += mcdi_vdpa.o ef100_vdpa.o
> +sfc-$(CONFIG_SFC_VDPA) += mcdi_vdpa.o ef100_vdpa.o ef100_vdpa_ops.o
> obj-$(CONFIG_SFC) += sfc.o
>
> obj-$(CONFIG_SFC_FALCON) += falcon/
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 7022fb2005a2..366ecd3c80b1 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -589,7 +589,7 @@ static int efx_ef10_probe(struct efx_nic *efx)
> if (rc)
> goto fail4;
>
> - rc = efx_get_pf_index(efx, &nic_data->pf_index);
> + rc = efx_get_fn_info(efx, &nic_data->pf_index, NULL);
> if (rc)
> goto fail5;
>
> diff --git a/drivers/net/ethernet/sfc/ef100_nic.c b/drivers/net/ethernet/sfc/ef100_nic.c
> index 41175eb00326..41811c519275 100644
> --- a/drivers/net/ethernet/sfc/ef100_nic.c
> +++ b/drivers/net/ethernet/sfc/ef100_nic.c
> @@ -1160,7 +1160,7 @@ static int ef100_probe_main(struct efx_nic *efx)
> if (rc)
> goto fail;
>
> - rc = efx_get_pf_index(efx, &nic_data->pf_index);
> + rc = efx_get_fn_info(efx, &nic_data->pf_index, &nic_data->vf_index);
> if (rc)
> goto fail;
>
> @@ -1247,13 +1247,33 @@ int ef100_probe_netdev_pf(struct efx_nic *efx)
>
> int ef100_probe_vf(struct efx_nic *efx)
> {
> - return ef100_probe_main(efx);
> +#if defined(CONFIG_SFC_VDPA)
> + int err;
> +#endif
> + int rc;
> +
> + rc = ef100_probe_main(efx);
> + if (rc)
> + return rc;
> +
> +#if defined(CONFIG_SFC_VDPA)
> + err = ef100_vdpa_register_mgmtdev(efx);
> + if (err)
> + pci_warn(efx->pci_dev,
> + "vdpa_register_mgmtdev failed, err: %d\n", err);
> +#endif
> + return 0;
> }
>
> void ef100_remove(struct efx_nic *efx)
> {
> struct ef100_nic_data *nic_data = efx->nic_data;
>
> +#if defined(CONFIG_SFC_VDPA)
> + if (efx_vdpa_supported(efx))
> + ef100_vdpa_unregister_mgmtdev(efx);
> +#endif
> +
> efx_mcdi_detach(efx);
> efx_mcdi_fini(efx);
> if (nic_data) {
> diff --git a/drivers/net/ethernet/sfc/ef100_nic.h b/drivers/net/ethernet/sfc/ef100_nic.h
> index 5ed693fbe79f..730c8bb932b0 100644
> --- a/drivers/net/ethernet/sfc/ef100_nic.h
> +++ b/drivers/net/ethernet/sfc/ef100_nic.h
> @@ -68,6 +68,13 @@ enum ef100_bar_config {
> EF100_BAR_CONFIG_VDPA,
> };
>
> +#ifdef CONFIG_SFC_VDPA
> +enum ef100_vdpa_class {
> + EF100_VDPA_CLASS_NONE,
> + EF100_VDPA_CLASS_NET,
> +};
> +#endif
> +
> struct ef100_nic_data {
> struct efx_nic *efx;
> struct efx_buffer mcdi_buf;
> @@ -75,7 +82,11 @@ struct ef100_nic_data {
> u32 datapath_caps2;
> u32 datapath_caps3;
> unsigned int pf_index;
> + unsigned int vf_index;
> u16 warm_boot_count;
> +#ifdef CONFIG_SFC_VDPA
> + enum ef100_vdpa_class vdpa_class;
> +#endif
> u8 port_id[ETH_ALEN];
> DECLARE_BITMAP(evq_phases, EFX_MAX_CHANNELS);
> enum ef100_bar_config bar_config;
> diff --git a/drivers/net/ethernet/sfc/ef100_vdpa.c b/drivers/net/ethernet/sfc/ef100_vdpa.c
> index 5e215cee585a..ff4bb61e598e 100644
> --- a/drivers/net/ethernet/sfc/ef100_vdpa.c
> +++ b/drivers/net/ethernet/sfc/ef100_vdpa.c
> @@ -11,11 +11,17 @@
> #include <linux/err.h>
> #include <linux/vdpa.h>
> #include <linux/virtio_net.h>
> +#include <uapi/linux/vdpa.h>
> #include "ef100_vdpa.h"
> #include "mcdi_vdpa.h"
> #include "mcdi_filters.h"
> #include "ef100_netdev.h"
>
> +static struct virtio_device_id ef100_vdpa_id_table[] = {
> + { .device = VIRTIO_ID_NET, .vendor = PCI_VENDOR_ID_REDHAT_QUMRANET },
> + { 0 },
> +};
> +
> int ef100_vdpa_init(struct efx_probe_data *probe_data)
> {
> struct efx_nic *efx = &probe_data->efx;
> @@ -42,17 +48,243 @@ int ef100_vdpa_init(struct efx_probe_data *probe_data)
> return rc;
> }
>
> +static void ef100_vdpa_delete(struct efx_nic *efx)
> +{
> + if (efx->vdpa_nic) {
> + /* replace with _vdpa_unregister_device later */
> + put_device(&efx->vdpa_nic->vdpa_dev.dev);
> + efx->vdpa_nic = NULL;
> + }
> +}
> +
> void ef100_vdpa_fini(struct efx_probe_data *probe_data)
> {
> struct efx_nic *efx = &probe_data->efx;
> + struct ef100_nic_data *nic_data;
>
> if (efx->state != STATE_VDPA && efx->state != STATE_DISABLED) {
> pci_err(efx->pci_dev, "Invalid efx state %u", efx->state);
> return;
> }
>
> + /* Handle vdpa device deletion, if not done explicitly */
> + ef100_vdpa_delete(efx);
> + nic_data = efx->nic_data;
> + nic_data->vdpa_class = EF100_VDPA_CLASS_NONE;
> efx->state = STATE_PROBED;
> down_write(&efx->filter_sem);
> efx_mcdi_filter_table_remove(efx);
> up_write(&efx->filter_sem);
> }
> +
> +static int get_net_config(struct ef100_vdpa_nic *vdpa_nic)
> +{
> + struct efx_nic *efx = vdpa_nic->efx;
> + u16 mtu;
> + int rc;
> +
> + vdpa_nic->net_config.max_virtqueue_pairs =
> + cpu_to_efx_vdpa16(vdpa_nic, vdpa_nic->max_queue_pairs);
> +
> + rc = efx_vdpa_get_mtu(efx, &mtu);
> + if (rc) {
> + dev_err(&vdpa_nic->vdpa_dev.dev,
> + "%s: Get MTU for vf:%u failed:%d\n", __func__,
> + vdpa_nic->vf_index, rc);
> + return rc;
> + }
> + vdpa_nic->net_config.mtu = cpu_to_efx_vdpa16(vdpa_nic, mtu);
> + vdpa_nic->net_config.status = cpu_to_efx_vdpa16(vdpa_nic,
> + VIRTIO_NET_S_LINK_UP);
> + return 0;
> +}
> +
> +static struct ef100_vdpa_nic *ef100_vdpa_create(struct efx_nic *efx,
> + const char *dev_name,
> + enum ef100_vdpa_class dev_type,
> + const u8 *mac)
> +{
> + struct ef100_nic_data *nic_data = efx->nic_data;
> + struct ef100_vdpa_nic *vdpa_nic;
> + struct device *dev;
> + int rc;
> +
> + nic_data->vdpa_class = dev_type;
> + vdpa_nic = vdpa_alloc_device(struct ef100_vdpa_nic,
> + vdpa_dev, &efx->pci_dev->dev,
> + &ef100_vdpa_config_ops,
> + 1, 1,
> + dev_name, false);
> + if (!vdpa_nic) {
> + pci_err(efx->pci_dev,
> + "vDPA device allocation failed for vf: %u\n",
> + nic_data->vf_index);
> + nic_data->vdpa_class = EF100_VDPA_CLASS_NONE;
> + return ERR_PTR(-ENOMEM);
> + }
> +
> + mutex_init(&vdpa_nic->lock);
> + dev = &vdpa_nic->vdpa_dev.dev;
> + efx->vdpa_nic = vdpa_nic;
> + vdpa_nic->vdpa_dev.dma_dev = &efx->pci_dev->dev;
> + vdpa_nic->vdpa_dev.mdev = efx->mgmt_dev;
> + vdpa_nic->efx = efx;
> + vdpa_nic->pf_index = nic_data->pf_index;
> + vdpa_nic->vf_index = nic_data->vf_index;
> + vdpa_nic->vdpa_state = EF100_VDPA_STATE_INITIALIZED;
> + vdpa_nic->mac_address = (u8 *)&vdpa_nic->net_config.mac;
> + ether_addr_copy(vdpa_nic->mac_address, mac);
> + vdpa_nic->mac_configured = true;
> +
> + rc = get_net_config(vdpa_nic);
> + if (rc)
> + goto err_put_device;
> +
> + /* _vdpa_register_device when its ready */
> +
> + return vdpa_nic;
> +
> +err_put_device:
> + /* put_device invokes ef100_vdpa_free */
> + put_device(&vdpa_nic->vdpa_dev.dev);
> + return ERR_PTR(rc);
> +}
> +
> +static void ef100_vdpa_net_dev_del(struct vdpa_mgmt_dev *mgmt_dev,
> + struct vdpa_device *vdev)
> +{
> + struct ef100_nic_data *nic_data;
> + struct efx_nic *efx;
> + int rc;
> +
> + efx = pci_get_drvdata(to_pci_dev(mgmt_dev->device));
> + nic_data = efx->nic_data;
> +
> + rc = efx_ef100_set_bar_config(efx, EF100_BAR_CONFIG_EF100);
> + if (rc)
> + pci_err(efx->pci_dev,
> + "set_bar_config EF100 failed, err: %d\n", rc);
> + else
> + pci_dbg(efx->pci_dev,
> + "vdpa net device deleted, vf: %u\n",
> + nic_data->vf_index);
> +}
> +
> +static int ef100_vdpa_net_dev_add(struct vdpa_mgmt_dev *mgmt_dev,
> + const char *name,
> + const struct vdpa_dev_set_config *config)
> +{
> + struct ef100_vdpa_nic *vdpa_nic;
> + struct ef100_nic_data *nic_data;
> + struct efx_nic *efx;
> + int rc, err;
> +
> + efx = pci_get_drvdata(to_pci_dev(mgmt_dev->device));
> + if (efx->vdpa_nic) {
> + pci_warn(efx->pci_dev,
> + "vDPA device already exists on this VF\n");
> + return -EEXIST;
> + }
> +
> + if (config->mask & BIT_ULL(VDPA_ATTR_DEV_NET_CFG_MACADDR)) {
> + if (!is_valid_ether_addr(config->net.mac)) {
> + pci_err(efx->pci_dev, "Invalid MAC address %pM\n",
> + config->net.mac);
> + return -EINVAL;
> + }
> + } else {
> + pci_err(efx->pci_dev, "MAC address parameter missing\n");
Does this mean ef100 vf doesn't have a given mac address?
> + return -EIO;
> + }
> +
> + nic_data = efx->nic_data;
> +
> + rc = efx_ef100_set_bar_config(efx, EF100_BAR_CONFIG_VDPA);
> + if (rc) {
> + pci_err(efx->pci_dev,
> + "set_bar_config vDPA failed, err: %d\n", rc);
> + goto err_set_bar_config;
> + }
> +
> + vdpa_nic = ef100_vdpa_create(efx, name, EF100_VDPA_CLASS_NET,
> + (const u8 *)config->net.mac);
> + if (IS_ERR(vdpa_nic)) {
> + pci_err(efx->pci_dev,
> + "vDPA device creation failed, vf: %u, err: %ld\n",
> + nic_data->vf_index, PTR_ERR(vdpa_nic));
> + rc = PTR_ERR(vdpa_nic);
> + goto err_set_bar_config;
> + } else {
> + pci_dbg(efx->pci_dev,
> + "vdpa net device created, vf: %u\n",
> + nic_data->vf_index);
> + pci_warn(efx->pci_dev,
> + "Use QEMU versions 6.1.0 and later with vhost-vdpa\n");
> + }
> +
> + return 0;
> +
> +err_set_bar_config:
> + err = efx_ef100_set_bar_config(efx, EF100_BAR_CONFIG_EF100);
> + if (err)
> + pci_err(efx->pci_dev,
> + "set_bar_config EF100 failed, err: %d\n", err);
> +
> + return rc;
> +}
> +
> +static const struct vdpa_mgmtdev_ops ef100_vdpa_net_mgmtdev_ops = {
> + .dev_add = ef100_vdpa_net_dev_add,
> + .dev_del = ef100_vdpa_net_dev_del
> +};
> +
> +int ef100_vdpa_register_mgmtdev(struct efx_nic *efx)
> +{
> + struct vdpa_mgmt_dev *mgmt_dev;
> + u64 features;
> + int rc;
> +
> + mgmt_dev = kzalloc(sizeof(*mgmt_dev), GFP_KERNEL);
> + if (!mgmt_dev)
> + return -ENOMEM;
> +
> + rc = efx_vdpa_get_features(efx, EF100_VDPA_DEVICE_TYPE_NET, &features);
> + if (rc) {
> + pci_err(efx->pci_dev, "%s: MCDI get features error:%d\n",
> + __func__, rc);
> + goto err_get_features;
> + }
> +
> + efx->mgmt_dev = mgmt_dev;
> + mgmt_dev->device = &efx->pci_dev->dev;
> + mgmt_dev->id_table = ef100_vdpa_id_table;
> + mgmt_dev->ops = &ef100_vdpa_net_mgmtdev_ops;
> + mgmt_dev->supported_features = features;
> + mgmt_dev->max_supported_vqs = EF100_VDPA_MAX_QUEUES_PAIRS * 2;
> + mgmt_dev->config_attr_mask = BIT_ULL(VDPA_ATTR_DEV_NET_CFG_MACADDR);
> +
> + rc = vdpa_mgmtdev_register(mgmt_dev);
> + if (rc) {
> + pci_err(efx->pci_dev,
> + "vdpa_mgmtdev_register failed, err: %d\n", rc);
> + goto err_mgmtdev_register;
> + }
> +
> + return 0;
> +
> +err_mgmtdev_register:
> +err_get_features:
> + kfree(mgmt_dev);
> + efx->mgmt_dev = NULL;
> +
> + return rc;
> +}
> +
> +void ef100_vdpa_unregister_mgmtdev(struct efx_nic *efx)
> +{
> + if (efx->mgmt_dev) {
> + vdpa_mgmtdev_unregister(efx->mgmt_dev);
> + kfree(efx->mgmt_dev);
> + efx->mgmt_dev = NULL;
> + }
> +}
> diff --git a/drivers/net/ethernet/sfc/ef100_vdpa.h b/drivers/net/ethernet/sfc/ef100_vdpa.h
> index 6b51a05becd8..83f6d819f6a5 100644
> --- a/drivers/net/ethernet/sfc/ef100_vdpa.h
> +++ b/drivers/net/ethernet/sfc/ef100_vdpa.h
> @@ -18,6 +18,24 @@
>
> #if defined(CONFIG_SFC_VDPA)
>
> +/* Max queue pairs currently supported */
> +#define EF100_VDPA_MAX_QUEUES_PAIRS 1
> +
> +/**
> + * enum ef100_vdpa_nic_state - possible states for a vDPA NIC
> + *
> + * @EF100_VDPA_STATE_INITIALIZED: State after vDPA NIC created
> + * @EF100_VDPA_STATE_NEGOTIATED: State after feature negotiation
> + * @EF100_VDPA_STATE_STARTED: State after driver ok
> + * @EF100_VDPA_STATE_NSTATES: Number of VDPA states
> + */
> +enum ef100_vdpa_nic_state {
> + EF100_VDPA_STATE_INITIALIZED,
> + EF100_VDPA_STATE_NEGOTIATED,
> + EF100_VDPA_STATE_STARTED,
> + EF100_VDPA_STATE_NSTATES
> +};
> +
> enum ef100_vdpa_device_type {
> EF100_VDPA_DEVICE_TYPE_NET,
> };
> @@ -28,7 +46,73 @@ enum ef100_vdpa_vq_type {
> EF100_VDPA_VQ_NTYPES
> };
>
> +/**
> + * struct ef100_vdpa_nic - vDPA NIC data structure
> + *
> + * @vdpa_dev: vdpa_device object which registers on the vDPA bus.
> + * @vdpa_state: NIC state machine governed by ef100_vdpa_nic_state
> + * @efx: pointer to the VF's efx_nic object
> + * @lock: Managing access to vdpa config operations
> + * @pf_index: PF index of the vDPA VF
> + * @vf_index: VF index of the vDPA VF
> + * @status: device status as per VIRTIO spec
> + * @features: negotiated feature bits
> + * @max_queue_pairs: maximum number of queue pairs supported
> + * @net_config: virtio_net_config data
> + * @mac_address: mac address of interface associated with this vdpa device
> + * @mac_configured: true after MAC address is configured
> + */
> +struct ef100_vdpa_nic {
> + struct vdpa_device vdpa_dev;
> + enum ef100_vdpa_nic_state vdpa_state;
> + struct efx_nic *efx;
> + /* for synchronizing access to vdpa config operations */
> + struct mutex lock;
> + u32 pf_index;
> + u32 vf_index;
> + u8 status;
> + u64 features;
> + u32 max_queue_pairs;
> + struct virtio_net_config net_config;
> + u8 *mac_address;
> + bool mac_configured;
> +};
> +
> int ef100_vdpa_init(struct efx_probe_data *probe_data);
> void ef100_vdpa_fini(struct efx_probe_data *probe_data);
> +int ef100_vdpa_register_mgmtdev(struct efx_nic *efx);
> +void ef100_vdpa_unregister_mgmtdev(struct efx_nic *efx);
> +
> +static inline bool efx_vdpa_is_little_endian(struct ef100_vdpa_nic *vdpa_nic)
> +{
> + return virtio_legacy_is_little_endian() ||
> + (vdpa_nic->features & (1ULL << VIRTIO_F_VERSION_1));
> +}
> +
> +static inline u16 efx_vdpa16_to_cpu(struct ef100_vdpa_nic *vdpa_nic,
> + __virtio16 val)
> +{
> + return __virtio16_to_cpu(efx_vdpa_is_little_endian(vdpa_nic), val);
> +}
> +
> +static inline __virtio16 cpu_to_efx_vdpa16(struct ef100_vdpa_nic *vdpa_nic,
> + u16 val)
> +{
> + return __cpu_to_virtio16(efx_vdpa_is_little_endian(vdpa_nic), val);
> +}
> +
> +static inline u32 efx_vdpa32_to_cpu(struct ef100_vdpa_nic *vdpa_nic,
> + __virtio32 val)
> +{
> + return __virtio32_to_cpu(efx_vdpa_is_little_endian(vdpa_nic), val);
> +}
> +
> +static inline __virtio32 cpu_to_efx_vdpa32(struct ef100_vdpa_nic *vdpa_nic,
> + u32 val)
> +{
> + return __cpu_to_virtio32(efx_vdpa_is_little_endian(vdpa_nic), val);
> +}
> +
> +extern const struct vdpa_config_ops ef100_vdpa_config_ops;
> #endif /* CONFIG_SFC_VDPA */
> #endif /* __EF100_VDPA_H__ */
> diff --git a/drivers/net/ethernet/sfc/ef100_vdpa_ops.c b/drivers/net/ethernet/sfc/ef100_vdpa_ops.c
> new file mode 100644
> index 000000000000..31952931c198
> --- /dev/null
> +++ b/drivers/net/ethernet/sfc/ef100_vdpa_ops.c
> @@ -0,0 +1,28 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/* Driver for Xilinx network controllers and boards
> + * Copyright(C) 2020-2022 Xilinx, Inc.
> + * Copyright(C) 2022 Advanced Micro Devices, Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License version 2 as published
> + * by the Free Software Foundation, incorporated herein by reference.
> + */
> +
> +#include <linux/vdpa.h>
> +#include "ef100_vdpa.h"
> +
> +static struct ef100_vdpa_nic *get_vdpa_nic(struct vdpa_device *vdev)
> +{
> + return container_of(vdev, struct ef100_vdpa_nic, vdpa_dev);
> +}
> +
> +static void ef100_vdpa_free(struct vdpa_device *vdev)
> +{
> + struct ef100_vdpa_nic *vdpa_nic = get_vdpa_nic(vdev);
> +
> + mutex_destroy(&vdpa_nic->lock);
> +}
> +
> +const struct vdpa_config_ops ef100_vdpa_config_ops = {
> + .free = ef100_vdpa_free,
> +};
> diff --git a/drivers/net/ethernet/sfc/mcdi_functions.c b/drivers/net/ethernet/sfc/mcdi_functions.c
> index d3e6d8239f5c..4415f19cf68f 100644
> --- a/drivers/net/ethernet/sfc/mcdi_functions.c
> +++ b/drivers/net/ethernet/sfc/mcdi_functions.c
> @@ -413,7 +413,8 @@ int efx_mcdi_window_mode_to_stride(struct efx_nic *efx, u8 vi_window_mode)
> return 0;
> }
>
> -int efx_get_pf_index(struct efx_nic *efx, unsigned int *pf_index)
> +int efx_get_fn_info(struct efx_nic *efx, unsigned int *pf_index,
> + unsigned int *vf_index)
> {
> MCDI_DECLARE_BUF(outbuf, MC_CMD_GET_FUNCTION_INFO_OUT_LEN);
> size_t outlen;
> @@ -426,6 +427,10 @@ int efx_get_pf_index(struct efx_nic *efx, unsigned int *pf_index)
> if (outlen < sizeof(outbuf))
> return -EIO;
>
> - *pf_index = MCDI_DWORD(outbuf, GET_FUNCTION_INFO_OUT_PF);
> + if (pf_index)
> + *pf_index = MCDI_DWORD(outbuf, GET_FUNCTION_INFO_OUT_PF);
> +
> + if (efx->type->is_vf && vf_index)
> + *vf_index = MCDI_DWORD(outbuf, GET_FUNCTION_INFO_OUT_VF);
> return 0;
> }
> diff --git a/drivers/net/ethernet/sfc/mcdi_functions.h b/drivers/net/ethernet/sfc/mcdi_functions.h
> index b0e2f53a0d9b..76dc0a13463e 100644
> --- a/drivers/net/ethernet/sfc/mcdi_functions.h
> +++ b/drivers/net/ethernet/sfc/mcdi_functions.h
> @@ -28,6 +28,7 @@ void efx_mcdi_rx_remove(struct efx_rx_queue *rx_queue);
> void efx_mcdi_rx_fini(struct efx_rx_queue *rx_queue);
> int efx_fini_dmaq(struct efx_nic *efx);
> int efx_mcdi_window_mode_to_stride(struct efx_nic *efx, u8 vi_window_mode);
> -int efx_get_pf_index(struct efx_nic *efx, unsigned int *pf_index);
> +int efx_get_fn_info(struct efx_nic *efx, unsigned int *pf_index,
> + unsigned int *vf_index);
>
> #endif
> diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
> index ffda80a95221..79356d614109 100644
> --- a/drivers/net/ethernet/sfc/net_driver.h
> +++ b/drivers/net/ethernet/sfc/net_driver.h
> @@ -1182,6 +1182,12 @@ struct efx_nic {
>
> unsigned int mem_bar;
> u32 reg_base;
> +#ifdef CONFIG_SFC_VDPA
> + /** @mgmt_dev: vDPA Management device */
> + struct vdpa_mgmt_dev *mgmt_dev;
> + /** @vdpa_nic: vDPA device structure (EF100) */
> + struct ef100_vdpa_nic *vdpa_nic;
> +#endif
>
> /* The following fields may be written more often */
>
> --
> 2.30.1
>
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