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From:   Si-Wei Liu <si-wei.liu@oracle.com>
To:     mst@redhat.com, jasowang@redhat.com
Cc:     virtualization@lists.linux-foundation.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH v2 2/4] vdpa: pass initial config to _vdpa_register_device()
Date:   Tue, 18 Oct 2022 16:50:30 -0700
Message-Id: <1666137032-28192-3-git-send-email-si-wei.liu@oracle.com>
In-Reply-To: <1666137032-28192-1-git-send-email-si-wei.liu@oracle.com>
References: <1666137032-28192-1-git-send-email-si-wei.liu@oracle.com>
Precedence: bulk

Just as _vdpa_register_device taking @nvqs as the number of queues
to feed userspace inquery via vdpa_dev_fill(), we can follow the
same to stash config attributes in struct vdpa_device at the time
of vdpa registration.

Signed-off-by: Si-Wei Liu <si-wei.liu@oracle.com>
---
 drivers/vdpa/ifcvf/ifcvf_main.c      |  2 +-
 drivers/vdpa/mlx5/net/mlx5_vnet.c    |  2 +-
 drivers/vdpa/vdpa.c                  | 15 +++++++++++----
 drivers/vdpa/vdpa_sim/vdpa_sim_blk.c |  2 +-
 drivers/vdpa/vdpa_sim/vdpa_sim_net.c |  2 +-
 drivers/vdpa/vdpa_user/vduse_dev.c   |  2 +-
 drivers/vdpa/virtio_pci/vp_vdpa.c    |  3 ++-
 include/linux/vdpa.h                 |  3 ++-
 8 files changed, 20 insertions(+), 11 deletions(-)

diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index f9c0044..c54ab2c 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -771,7 +771,7 @@ static int ifcvf_vdpa_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
 	else
 		ret = dev_set_name(&vdpa_dev->dev, "vdpa%u", vdpa_dev->index);
 
-	ret = _vdpa_register_device(&adapter->vdpa, vf->nr_vring);
+	ret = _vdpa_register_device(&adapter->vdpa, vf->nr_vring, config);
 	if (ret) {
 		put_device(&adapter->vdpa.dev);
 		IFCVF_ERR(pdev, "Failed to register to vDPA bus");
diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 9091336..376082e 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -3206,7 +3206,7 @@ static int mlx5_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name,
 	mlx5_notifier_register(mdev, &ndev->nb);
 	ndev->nb_registered = true;
 	mvdev->vdev.mdev = &mgtdev->mgtdev;
-	err = _vdpa_register_device(&mvdev->vdev, max_vqs + 1);
+	err = _vdpa_register_device(&mvdev->vdev, max_vqs + 1, add_config);
 	if (err)
 		goto err_reg;
 
diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index febdc99..566c1c6 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -215,11 +215,16 @@ static int vdpa_name_match(struct device *dev, const void *data)
 	return (strcmp(dev_name(&vdev->dev), data) == 0);
 }
 
-static int __vdpa_register_device(struct vdpa_device *vdev, u32 nvqs)
+static int __vdpa_register_device(struct vdpa_device *vdev, u32 nvqs,
+				  const struct vdpa_dev_set_config *cfg)
 {
 	struct device *dev;
 
 	vdev->nvqs = nvqs;
+	if (cfg)
+		vdev->vdev_cfg = *cfg;
+	else
+		vdev->vdev_cfg.mask = 0ULL;
 
 	lockdep_assert_held(&vdpa_dev_lock);
 	dev = bus_find_device(&vdpa_bus, NULL, dev_name(&vdev->dev), vdpa_name_match);
@@ -237,15 +242,17 @@ static int __vdpa_register_device(struct vdpa_device *vdev, u32 nvqs)
  * callback after setting up valid mgmtdev for this vdpa device.
  * @vdev: the vdpa device to be registered to vDPA bus
  * @nvqs: number of virtqueues supported by this device
+ * @cfg: initial config on vdpa device creation
  *
  * Return: Returns an error when fail to add device to vDPA bus
  */
-int _vdpa_register_device(struct vdpa_device *vdev, u32 nvqs)
+int _vdpa_register_device(struct vdpa_device *vdev, u32 nvqs,
+			  const struct vdpa_dev_set_config *cfg)
 {
 	if (!vdev->mdev)
 		return -EINVAL;
 
-	return __vdpa_register_device(vdev, nvqs);
+	return __vdpa_register_device(vdev, nvqs, cfg);
 }
 EXPORT_SYMBOL_GPL(_vdpa_register_device);
 
@@ -262,7 +269,7 @@ int vdpa_register_device(struct vdpa_device *vdev, u32 nvqs)
 	int err;
 
 	down_write(&vdpa_dev_lock);
-	err = __vdpa_register_device(vdev, nvqs);
+	err = __vdpa_register_device(vdev, nvqs, NULL);
 	up_write(&vdpa_dev_lock);
 	return err;
 }
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
index c6db1a1..5e1cebc 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
@@ -387,7 +387,7 @@ static int vdpasim_blk_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
 	if (IS_ERR(simdev))
 		return PTR_ERR(simdev);
 
-	ret = _vdpa_register_device(&simdev->vdpa, VDPASIM_BLK_VQ_NUM);
+	ret = _vdpa_register_device(&simdev->vdpa, VDPASIM_BLK_VQ_NUM, config);
 	if (ret)
 		goto put_dev;
 
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
index c3cb225..06ef5a0 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim_net.c
@@ -260,7 +260,7 @@ static int vdpasim_net_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
 
 	vdpasim_net_setup_config(simdev, config);
 
-	ret = _vdpa_register_device(&simdev->vdpa, VDPASIM_NET_VQ_NUM);
+	ret = _vdpa_register_device(&simdev->vdpa, VDPASIM_NET_VQ_NUM, config);
 	if (ret)
 		goto reg_err;
 
diff --git a/drivers/vdpa/vdpa_user/vduse_dev.c b/drivers/vdpa/vdpa_user/vduse_dev.c
index 35dceee..6530fd2 100644
--- a/drivers/vdpa/vdpa_user/vduse_dev.c
+++ b/drivers/vdpa/vdpa_user/vduse_dev.c
@@ -1713,7 +1713,7 @@ static int vdpa_dev_add(struct vdpa_mgmt_dev *mdev, const char *name,
 	if (ret)
 		return ret;
 
-	ret = _vdpa_register_device(&dev->vdev->vdpa, dev->vq_num);
+	ret = _vdpa_register_device(&dev->vdev->vdpa, dev->vq_num, config);
 	if (ret) {
 		put_device(&dev->vdev->vdpa.dev);
 		return ret;
diff --git a/drivers/vdpa/virtio_pci/vp_vdpa.c b/drivers/vdpa/virtio_pci/vp_vdpa.c
index d448db0..ffdc90e 100644
--- a/drivers/vdpa/virtio_pci/vp_vdpa.c
+++ b/drivers/vdpa/virtio_pci/vp_vdpa.c
@@ -538,7 +538,8 @@ static int vp_vdpa_dev_add(struct vdpa_mgmt_dev *v_mdev, const char *name,
 	vp_vdpa->config_irq = VIRTIO_MSI_NO_VECTOR;
 
 	vp_vdpa->vdpa.mdev = &vp_vdpa_mgtdev->mgtdev;
-	ret = _vdpa_register_device(&vp_vdpa->vdpa, vp_vdpa->queues);
+	ret = _vdpa_register_device(&vp_vdpa->vdpa, vp_vdpa->queues,
+				    add_config);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to register to vdpa bus\n");
 		goto err;
diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index f1838f5..b9d50e8 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -381,7 +381,8 @@ struct vdpa_device *__vdpa_alloc_device(struct device *parent,
 int vdpa_register_device(struct vdpa_device *vdev, u32 nvqs);
 void vdpa_unregister_device(struct vdpa_device *vdev);
 
-int _vdpa_register_device(struct vdpa_device *vdev, u32 nvqs);
+int _vdpa_register_device(struct vdpa_device *vdev, u32 nvqs,
+			  const struct vdpa_dev_set_config *cfg);
 void _vdpa_unregister_device(struct vdpa_device *vdev);
 
 /**
-- 
1.8.3.1