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vdpa: Add reset callback in vdpa_config_ops 

This adds a new callback to support device specific reset
behavior. The vdpa bus driver will call the reset function
instead of setting status to zero during resetting.

Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Link: https://lore.kernel.org/r/20210831103634.33-6-xieyongji@bytedance.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Xie Yongji 2021-08-31 18:36:26 +08:00 committed by Michael S. Tsirkin
parent 86e17a51c1
commit 0686082dbf
6 changed files with 89 additions and 36 deletions
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35
drivers/vdpa/ifcvf/ifcvf_main.c
View File

@ -222,17 +222,6 @@ static void ifcvf_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
if (status_old == status)
return;
if ((status_old & VIRTIO_CONFIG_S_DRIVER_OK) &&
!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
ifcvf_stop_datapath(adapter);
ifcvf_free_irq(adapter, vf->nr_vring);
}
if (status == 0) {
ifcvf_reset_vring(adapter);
return;
}
if ((status & VIRTIO_CONFIG_S_DRIVER_OK) &&
!(status_old & VIRTIO_CONFIG_S_DRIVER_OK)) {
ret = ifcvf_request_irq(adapter);
@ -252,6 +241,29 @@ static void ifcvf_vdpa_set_status(struct vdpa_device *vdpa_dev, u8 status)
ifcvf_set_status(vf, status);
}
static int ifcvf_vdpa_reset(struct vdpa_device *vdpa_dev)
{
struct ifcvf_adapter *adapter;
struct ifcvf_hw *vf;
u8 status_old;
vf = vdpa_to_vf(vdpa_dev);
adapter = vdpa_to_adapter(vdpa_dev);
status_old = ifcvf_get_status(vf);
if (status_old == 0)
return 0;
if (status_old & VIRTIO_CONFIG_S_DRIVER_OK) {
ifcvf_stop_datapath(adapter);
ifcvf_free_irq(adapter, vf->nr_vring);
}
ifcvf_reset_vring(adapter);
return 0;
}
static u16 ifcvf_vdpa_get_vq_num_max(struct vdpa_device *vdpa_dev)
{
return IFCVF_QUEUE_MAX;
@ -435,6 +447,7 @@ static const struct vdpa_config_ops ifc_vdpa_ops = {
.set_features = ifcvf_vdpa_set_features,
.get_status = ifcvf_vdpa_get_status,
.set_status = ifcvf_vdpa_set_status,
.reset = ifcvf_vdpa_reset,
.get_vq_num_max = ifcvf_vdpa_get_vq_num_max,
.get_vq_state = ifcvf_vdpa_get_vq_state,
.set_vq_state = ifcvf_vdpa_set_vq_state,

40
drivers/vdpa/mlx5/net/mlx5_vnet.c
View File

@ -2154,22 +2154,6 @@ static void mlx5_vdpa_set_status(struct vdpa_device *vdev, u8 status)
int err;
print_status(mvdev, status, true);
if (!status) {
mlx5_vdpa_info(mvdev, "performing device reset\n");
teardown_driver(ndev);
clear_vqs_ready(ndev);
mlx5_vdpa_destroy_mr(&ndev->mvdev);
ndev->mvdev.status = 0;
ndev->mvdev.mlx_features = 0;
memset(ndev->event_cbs, 0, sizeof(ndev->event_cbs));
ndev->mvdev.actual_features = 0;
++mvdev->generation;
if (MLX5_CAP_GEN(mvdev->mdev, umem_uid_0)) {
if (mlx5_vdpa_create_mr(mvdev, NULL))
mlx5_vdpa_warn(mvdev, "create MR failed\n");
}
return;
}
if ((status ^ ndev->mvdev.status) & VIRTIO_CONFIG_S_DRIVER_OK) {
if (status & VIRTIO_CONFIG_S_DRIVER_OK) {
@ -2192,6 +2176,29 @@ err_setup:
ndev->mvdev.status |= VIRTIO_CONFIG_S_FAILED;
}
static int mlx5_vdpa_reset(struct vdpa_device *vdev)
{
struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
struct mlx5_vdpa_net *ndev = to_mlx5_vdpa_ndev(mvdev);
print_status(mvdev, 0, true);
mlx5_vdpa_info(mvdev, "performing device reset\n");
teardown_driver(ndev);
clear_vqs_ready(ndev);
mlx5_vdpa_destroy_mr(&ndev->mvdev);
ndev->mvdev.status = 0;
ndev->mvdev.mlx_features = 0;
memset(ndev->event_cbs, 0, sizeof(ndev->event_cbs));
ndev->mvdev.actual_features = 0;
++mvdev->generation;
if (MLX5_CAP_GEN(mvdev->mdev, umem_uid_0)) {
if (mlx5_vdpa_create_mr(mvdev, NULL))
mlx5_vdpa_warn(mvdev, "create MR failed\n");
}
return 0;
}
static size_t mlx5_vdpa_get_config_size(struct vdpa_device *vdev)
{
return sizeof(struct virtio_net_config);
@ -2305,6 +2312,7 @@ static const struct vdpa_config_ops mlx5_vdpa_ops = {
.get_vendor_id = mlx5_vdpa_get_vendor_id,
.get_status = mlx5_vdpa_get_status,
.set_status = mlx5_vdpa_set_status,
.reset = mlx5_vdpa_reset,
.get_config_size = mlx5_vdpa_get_config_size,
.get_config = mlx5_vdpa_get_config,
.set_config = mlx5_vdpa_set_config,

18
drivers/vdpa/vdpa_sim/vdpa_sim.c
View File

@ -92,7 +92,7 @@ static void vdpasim_vq_reset(struct vdpasim *vdpasim,
vq->vring.notify = NULL;
}
static void vdpasim_reset(struct vdpasim *vdpasim)
static void vdpasim_do_reset(struct vdpasim *vdpasim)
{
int i;
@ -460,11 +460,21 @@ static void vdpasim_set_status(struct vdpa_device *vdpa, u8 status)
spin_lock(&vdpasim->lock);
vdpasim->status = status;
if (status == 0)
vdpasim_reset(vdpasim);
spin_unlock(&vdpasim->lock);
}
static int vdpasim_reset(struct vdpa_device *vdpa)
{
struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
spin_lock(&vdpasim->lock);
vdpasim->status = 0;
vdpasim_do_reset(vdpasim);
spin_unlock(&vdpasim->lock);
return 0;
}
static size_t vdpasim_get_config_size(struct vdpa_device *vdpa)
{
struct vdpasim *vdpasim = vdpa_to_sim(vdpa);
@ -608,6 +618,7 @@ static const struct vdpa_config_ops vdpasim_config_ops = {
.get_vendor_id = vdpasim_get_vendor_id,
.get_status = vdpasim_get_status,
.set_status = vdpasim_set_status,
.reset = vdpasim_reset,
.get_config_size = vdpasim_get_config_size,
.get_config = vdpasim_get_config,
.set_config = vdpasim_set_config,
@ -636,6 +647,7 @@ static const struct vdpa_config_ops vdpasim_batch_config_ops = {
.get_vendor_id = vdpasim_get_vendor_id,
.get_status = vdpasim_get_status,
.set_status = vdpasim_set_status,
.reset = vdpasim_reset,
.get_config_size = vdpasim_get_config_size,
.get_config = vdpasim_get_config,
.set_config = vdpasim_set_config,

15
drivers/vdpa/virtio_pci/vp_vdpa.c
View File

@ -189,10 +189,20 @@ static void vp_vdpa_set_status(struct vdpa_device *vdpa, u8 status)
}
vp_modern_set_status(mdev, status);
}
if (!(status & VIRTIO_CONFIG_S_DRIVER_OK) &&
(s & VIRTIO_CONFIG_S_DRIVER_OK))
static int vp_vdpa_reset(struct vdpa_device *vdpa)
{
struct vp_vdpa *vp_vdpa = vdpa_to_vp(vdpa);
struct virtio_pci_modern_device *mdev = &vp_vdpa->mdev;
u8 s = vp_vdpa_get_status(vdpa);
vp_modern_set_status(mdev, 0);
if (s & VIRTIO_CONFIG_S_DRIVER_OK)
vp_vdpa_free_irq(vp_vdpa);
return 0;
}
static u16 vp_vdpa_get_vq_num_max(struct vdpa_device *vdpa)
@ -398,6 +408,7 @@ static const struct vdpa_config_ops vp_vdpa_ops = {
.set_features = vp_vdpa_set_features,
.get_status = vp_vdpa_get_status,
.set_status = vp_vdpa_set_status,
.reset = vp_vdpa_reset,
.get_vq_num_max = vp_vdpa_get_vq_num_max,
.get_vq_state = vp_vdpa_get_vq_state,
.get_vq_notification = vp_vdpa_get_vq_notification,

9
drivers/vhost/vdpa.c
View File

@ -157,7 +157,7 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
struct vdpa_device *vdpa = v->vdpa;
const struct vdpa_config_ops *ops = vdpa->config;
u8 status, status_old;
int nvqs = v->nvqs;
int ret, nvqs = v->nvqs;
u16 i;
if (copy_from_user(&status, statusp, sizeof(status)))
@ -172,7 +172,12 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
if (status != 0 && (ops->get_status(vdpa) & ~status) != 0)
return -EINVAL;
ops->set_status(vdpa, status);
if (status == 0) {
ret = ops->reset(vdpa);
if (ret)
return ret;
} else
ops->set_status(vdpa, status);
if ((status & VIRTIO_CONFIG_S_DRIVER_OK) && !(status_old & VIRTIO_CONFIG_S_DRIVER_OK))
for (i = 0; i < nvqs; i++)

8
include/linux/vdpa.h
View File

@ -171,6 +171,9 @@ struct vdpa_iova_range {
* @set_status: Set the device status
* @vdev: vdpa device
* @status: virtio device status
* @reset: Reset device
* @vdev: vdpa device
* Returns integer: success (0) or error (< 0)
* @get_config_size: Get the size of the configuration space
* @vdev: vdpa device
* Returns size_t: configuration size
@ -255,6 +258,7 @@ struct vdpa_config_ops {
u32 (*get_vendor_id)(struct vdpa_device *vdev);
u8 (*get_status)(struct vdpa_device *vdev);
void (*set_status)(struct vdpa_device *vdev, u8 status);
int (*reset)(struct vdpa_device *vdev);
size_t (*get_config_size)(struct vdpa_device *vdev);
void (*get_config)(struct vdpa_device *vdev, unsigned int offset,
void *buf, unsigned int len);
@ -348,12 +352,12 @@ static inline struct device *vdpa_get_dma_dev(struct vdpa_device *vdev)
return vdev->dma_dev;
}
static inline void vdpa_reset(struct vdpa_device *vdev)
static inline int vdpa_reset(struct vdpa_device *vdev)
{
const struct vdpa_config_ops *ops = vdev->config;
vdev->features_valid = false;
ops->set_status(vdev, 0);
return ops->reset(vdev);
}
static inline int vdpa_set_features(struct vdpa_device *vdev, u64 features)