From: Mateusz Polrola mateuszx.potrola@intel.com
Introduced additional init and cleanup routines in the backend API structure that might be useful for hypervisors other than Xen.
Signed-off-by: Mateusz Polrola mateuszx.potrola@intel.com Signed-off-by: Dongwon Kim dongwon.kim@intel.com --- drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.c | 14 ++++++++++++++ drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.h | 6 ++++++ drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_drv.c | 2 ++ 3 files changed, 22 insertions(+)
diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.c b/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.c index 161fee7..f2731bf 100644 --- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.c +++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.c @@ -330,6 +330,16 @@ static int __init hyper_dmabuf_drv_init(void) hy_drv_priv->pending = 0; #endif
+ if (hy_drv_priv->bknd_ops->init) { + ret = hy_drv_priv->bknd_ops->init(); + + if (ret < 0) { + dev_dbg(hy_drv_priv->dev, + "failed to initialize backend.\n"); + return ret; + } + } + hy_drv_priv->domid = hy_drv_priv->bknd_ops->get_vm_id();
ret = hy_drv_priv->bknd_ops->init_comm_env(); @@ -362,6 +372,10 @@ static void hyper_dmabuf_drv_exit(void)
hy_drv_priv->bknd_ops->destroy_comm();
+ if (hy_drv_priv->bknd_ops->cleanup) { + hy_drv_priv->bknd_ops->cleanup(); + }; + /* destroy workqueue */ if (hy_drv_priv->work_queue) destroy_workqueue(hy_drv_priv->work_queue); diff --git a/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.h b/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.h index 4a51f9e..9337d53 100644 --- a/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.h +++ b/drivers/xen/hyper_dmabuf/hyper_dmabuf_drv.h @@ -73,6 +73,12 @@ struct list_reusable_id { };
struct hyper_dmabuf_bknd_ops { + /* backend initialization routine (optional) */ + int (*init)(void); + + /* backend cleanup routine (optional) */ + int (*cleanup)(void); + /* retreiving id of current virtual machine */ int (*get_vm_id)(void);
diff --git a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_drv.c b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_drv.c index 1d7249d..14ed3bc 100644 --- a/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_drv.c +++ b/drivers/xen/hyper_dmabuf/xen/hyper_dmabuf_xen_drv.c @@ -31,6 +31,8 @@ #include "hyper_dmabuf_xen_shm.h"
struct hyper_dmabuf_bknd_ops xen_bknd_ops = { + .init = NULL, /* not needed for xen */ + .cleanup = NULL, /* not needed for xen */ .get_vm_id = xen_be_get_domid, .share_pages = xen_be_share_pages, .unshare_pages = xen_be_unshare_pages,