From d3bb20195b5e4c65835f4f3150422313a20f0342 Mon Sep 17 00:00:00 2001 From: Stefano Garzarella Date: Mon, 15 Mar 2021 17:34:50 +0100 Subject: [PATCH] vdpa_sim_blk: add support for vdpa management tool stable inclusion from stable-v5.13 commit 899c4d187f6a5c11d8eae33506fa0736dbabc39f category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I5WXCZ CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=899c4d187f6a5c11d8eae33506fa0736dbabc39f ---------------------------------------------------------------------- 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 Link: https://lore.kernel.org/r/20210315163450.254396-15-sgarzare@redhat.com Signed-off-by: Michael S. Tsirkin Acked-by: Jason Wang Signed-off-by: Pengyuan Zhao --- drivers/vdpa/vdpa_sim/vdpa_sim_blk.c | 77 +++++++++++++++++++++++----- 1 file changed, 63 insertions(+), 14 deletions(-) diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c index 64926a70af5e..0650328c7475 100644 --- a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c +++ b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c @@ -35,8 +35,6 @@ #define VDPASIM_BLK_SEG_MAX 32 #define VDPASIM_BLK_VQ_NUM 1 -static struct vdpasim *vdpasim_blk_dev; - static void vdpasim_blk_work(struct work_struct *work) { struct vdpasim *vdpasim = container_of(work, struct vdpasim, work); @@ -98,11 +96,23 @@ 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; @@ -111,29 +121,68 @@ static int __init vdpasim_blk_init(void) dev_attr.work_fn = vdpasim_blk_work; dev_attr.buffer_size = PAGE_SIZE; - 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) -- GitLab