| Message ID | 20210315163450.254396-15-sgarzare@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | vdpa: add vdpa simulator for block device | expand |
在 2021/3/16 上午12:34, Stefano Garzarella 写道: > Enable the user to create vDPA block simulator devices using the > vdpa management tool: > > # Show vDPA supported devices > $ vdpa mgmtdev show > vdpasim_blk: > supported_classes block > > # Create a vDPA block device named as 'blk0' from the management > # device vdpasim: > $ vdpa dev add mgmtdev vdpasim_blk name blk0 > > # Show the info of the 'blk0' device just created > $ vdpa dev show blk0 -jp > { > "dev": { > "blk0": { > "type": "block", > "mgmtdev": "vdpasim_blk", > "vendor_id": 0, > "max_vqs": 1, > "max_vq_size": 256 > } > } > } > > # Delete the vDPA device after its use > $ vdpa dev del blk0 > > Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> > --- > drivers/vdpa/vdpa_sim/vdpa_sim_blk.c | 76 +++++++++++++++++++++++----- > 1 file changed, 63 insertions(+), 13 deletions(-) > > diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c > index 643ae3bc62c0..5bfe1c281645 100644 > --- a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c > +++ b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c > @@ -37,7 +37,6 @@ > #define VDPASIM_BLK_SEG_MAX 32 > #define VDPASIM_BLK_VQ_NUM 1 > > -static struct vdpasim *vdpasim_blk_dev; > static char vdpasim_blk_id[VIRTIO_BLK_ID_BYTES] = "vdpa_blk_sim"; > > static bool vdpasim_blk_check_range(u64 start_sector, size_t range_size) > @@ -241,11 +240,23 @@ static void vdpasim_blk_get_config(struct vdpasim *vdpasim, void *config) > blk_config->blk_size = cpu_to_vdpasim32(vdpasim, SECTOR_SIZE); > } > > -static int __init vdpasim_blk_init(void) > +static void vdpasim_blk_mgmtdev_release(struct device *dev) > +{ > +} > + > +static struct device vdpasim_blk_mgmtdev = { > + .init_name = "vdpasim_blk", > + .release = vdpasim_blk_mgmtdev_release, > +}; > + > +static int vdpasim_blk_dev_add(struct vdpa_mgmt_dev *mdev, const char *name) > { > struct vdpasim_dev_attr dev_attr = {}; > + struct vdpasim *simdev; > int ret; > > + dev_attr.mgmt_dev = mdev; > + dev_attr.name = name; > dev_attr.id = VIRTIO_ID_BLOCK; > dev_attr.supported_features = VDPASIM_BLK_FEATURES; > dev_attr.nvqs = VDPASIM_BLK_VQ_NUM; > @@ -254,29 +265,68 @@ static int __init vdpasim_blk_init(void) > dev_attr.work_fn = vdpasim_blk_work; > dev_attr.buffer_size = VDPASIM_BLK_CAPACITY << SECTOR_SHIFT; > > - vdpasim_blk_dev = vdpasim_create(&dev_attr); > - if (IS_ERR(vdpasim_blk_dev)) { > - ret = PTR_ERR(vdpasim_blk_dev); > - goto out; > - } > + simdev = vdpasim_create(&dev_attr); > + if (IS_ERR(simdev)) > + return PTR_ERR(simdev); > > - ret = vdpa_register_device(&vdpasim_blk_dev->vdpa, VDPASIM_BLK_VQ_NUM); > + ret = _vdpa_register_device(&simdev->vdpa, VDPASIM_BLK_VQ_NUM); > if (ret) > goto put_dev; > > return 0; > > put_dev: > - put_device(&vdpasim_blk_dev->vdpa.dev); > -out: > + put_device(&simdev->vdpa.dev); > return ret; > } > > -static void __exit vdpasim_blk_exit(void) > +static void vdpasim_blk_dev_del(struct vdpa_mgmt_dev *mdev, > + struct vdpa_device *dev) > { > - struct vdpa_device *vdpa = &vdpasim_blk_dev->vdpa; > + struct vdpasim *simdev = container_of(dev, struct vdpasim, vdpa); > + > + _vdpa_unregister_device(&simdev->vdpa); > +} > + > +static const struct vdpa_mgmtdev_ops vdpasim_blk_mgmtdev_ops = { > + .dev_add = vdpasim_blk_dev_add, > + .dev_del = vdpasim_blk_dev_del > +}; > > - vdpa_unregister_device(vdpa); > +static struct virtio_device_id id_table[] = { > + { VIRTIO_ID_BLOCK, VIRTIO_DEV_ANY_ID }, > + { 0 }, > +}; > + > +static struct vdpa_mgmt_dev mgmt_dev = { > + .device = &vdpasim_blk_mgmtdev, > + .id_table = id_table, > + .ops = &vdpasim_blk_mgmtdev_ops, > +}; > + > +static int __init vdpasim_blk_init(void) > +{ > + int ret; > + > + ret = device_register(&vdpasim_blk_mgmtdev); > + if (ret) > + return ret; > + > + ret = vdpa_mgmtdev_register(&mgmt_dev); > + if (ret) > + goto parent_err; > + > + return 0; > + > +parent_err: > + device_unregister(&vdpasim_blk_mgmtdev); > + return ret; > +} > + > +static void __exit vdpasim_blk_exit(void) > +{ > + vdpa_mgmtdev_unregister(&mgmt_dev); > + device_unregister(&vdpasim_blk_mgmtdev); > } > > module_init(vdpasim_blk_init)
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c index 643ae3bc62c0..5bfe1c281645 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c @@ -37,7 +37,6 @@ #define VDPASIM_BLK_SEG_MAX 32 #define VDPASIM_BLK_VQ_NUM 1 -static struct vdpasim *vdpasim_blk_dev; static char vdpasim_blk_id[VIRTIO_BLK_ID_BYTES] = "vdpa_blk_sim"; static bool vdpasim_blk_check_range(u64 start_sector, size_t range_size) @@ -241,11 +240,23 @@ static void vdpasim_blk_get_config(struct vdpasim *vdpasim, void *config) blk_config->blk_size = cpu_to_vdpasim32(vdpasim, SECTOR_SIZE); } -static int __init vdpasim_blk_init(void) +static void vdpasim_blk_mgmtdev_release(struct device *dev) +{ +} + +static struct device vdpasim_blk_mgmtdev = { + .init_name = "vdpasim_blk", + .release = vdpasim_blk_mgmtdev_release, +}; + +static int vdpasim_blk_dev_add(struct vdpa_mgmt_dev *mdev, const char *name) { struct vdpasim_dev_attr dev_attr = {}; + struct vdpasim *simdev; int ret; + dev_attr.mgmt_dev = mdev; + dev_attr.name = name; dev_attr.id = VIRTIO_ID_BLOCK; dev_attr.supported_features = VDPASIM_BLK_FEATURES; dev_attr.nvqs = VDPASIM_BLK_VQ_NUM; @@ -254,29 +265,68 @@ static int __init vdpasim_blk_init(void) dev_attr.work_fn = vdpasim_blk_work; dev_attr.buffer_size = VDPASIM_BLK_CAPACITY << SECTOR_SHIFT; - vdpasim_blk_dev = vdpasim_create(&dev_attr); - if (IS_ERR(vdpasim_blk_dev)) { - ret = PTR_ERR(vdpasim_blk_dev); - goto out; - } + simdev = vdpasim_create(&dev_attr); + if (IS_ERR(simdev)) + return PTR_ERR(simdev); - ret = vdpa_register_device(&vdpasim_blk_dev->vdpa, VDPASIM_BLK_VQ_NUM); + ret = _vdpa_register_device(&simdev->vdpa, VDPASIM_BLK_VQ_NUM); if (ret) goto put_dev; return 0; put_dev: - put_device(&vdpasim_blk_dev->vdpa.dev); -out: + put_device(&simdev->vdpa.dev); return ret; } -static void __exit vdpasim_blk_exit(void) +static void vdpasim_blk_dev_del(struct vdpa_mgmt_dev *mdev, + struct vdpa_device *dev) { - struct vdpa_device *vdpa = &vdpasim_blk_dev->vdpa; + struct vdpasim *simdev = container_of(dev, struct vdpasim, vdpa); + + _vdpa_unregister_device(&simdev->vdpa); +} + +static const struct vdpa_mgmtdev_ops vdpasim_blk_mgmtdev_ops = { + .dev_add = vdpasim_blk_dev_add, + .dev_del = vdpasim_blk_dev_del +}; - vdpa_unregister_device(vdpa); +static struct virtio_device_id id_table[] = { + { VIRTIO_ID_BLOCK, VIRTIO_DEV_ANY_ID }, + { 0 }, +}; + +static struct vdpa_mgmt_dev mgmt_dev = { + .device = &vdpasim_blk_mgmtdev, + .id_table = id_table, + .ops = &vdpasim_blk_mgmtdev_ops, +}; + +static int __init vdpasim_blk_init(void) +{ + int ret; + + ret = device_register(&vdpasim_blk_mgmtdev); + if (ret) + return ret; + + ret = vdpa_mgmtdev_register(&mgmt_dev); + if (ret) + goto parent_err; + + return 0; + +parent_err: + device_unregister(&vdpasim_blk_mgmtdev); + return ret; +} + +static void __exit vdpasim_blk_exit(void) +{ + vdpa_mgmtdev_unregister(&mgmt_dev); + device_unregister(&vdpasim_blk_mgmtdev); } module_init(vdpasim_blk_init)
Enable the user to create vDPA block simulator devices using the vdpa management tool: # Show vDPA supported devices $ vdpa mgmtdev show vdpasim_blk: supported_classes block # Create a vDPA block device named as 'blk0' from the management # device vdpasim: $ vdpa dev add mgmtdev vdpasim_blk name blk0 # Show the info of the 'blk0' device just created $ vdpa dev show blk0 -jp { "dev": { "blk0": { "type": "block", "mgmtdev": "vdpasim_blk", "vendor_id": 0, "max_vqs": 1, "max_vq_size": 256 } } } # Delete the vDPA device after its use $ vdpa dev del blk0 Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> --- drivers/vdpa/vdpa_sim/vdpa_sim_blk.c | 76 +++++++++++++++++++++++----- 1 file changed, 63 insertions(+), 13 deletions(-)