netdev - [PATCH v6 1/4] vdpa: Add suspend operation

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Message-Id: <20220623160738.632852-2-eperezma@redhat.com>
Date:   Thu, 23 Jun 2022 18:07:35 +0200
From:   Eugenio Pérez <eperezma@...hat.com>
To:     netdev@...r.kernel.org, Jason Wang <jasowang@...hat.com>,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
        "Michael S. Tsirkin" <mst@...hat.com>
Cc:     Parav Pandit <parav@...dia.com>,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        lulu@...hat.com, tanuj.kamde@....com,
        Si-Wei Liu <si-wei.liu@...cle.com>, Piotr.Uminski@...el.com,
        habetsm.xilinx@...il.com, gautam.dawar@....com, pabloc@...inx.com,
        Zhu Lingshan <lingshan.zhu@...el.com>, lvivier@...hat.com,
        Longpeng <longpeng2@...wei.com>, dinang@...inx.com,
        martinh@...inx.com, martinpo@...inx.com,
        Eli Cohen <elic@...dia.com>, ecree.xilinx@...il.com,
        Wu Zongyong <wuzongyong@...ux.alibaba.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        Dan Carpenter <dan.carpenter@...cle.com>, hanand@...inx.com,
        Xie Yongji <xieyongji@...edance.com>,
        Zhang Min <zhang.min9@....com.cn>
Subject: [PATCH v6 1/4] vdpa: Add suspend operation

This operation is optional: It it's not implemented, backend feature bit
will not be exposed.

Signed-off-by: Eugenio Pérez <eperezma@...hat.com>
---
 include/linux/vdpa.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index 7b4a13d3bd91..d282f464d2f1 100644
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -218,6 +218,9 @@ struct vdpa_map_file {
  * @reset:			Reset device
  *				@vdev: vdpa device
  *				Returns integer: success (0) or error (< 0)
+ * @suspend:			Suspend or resume the device (optional)
+ *				@vdev: vdpa device
+ *				Returns integer: success (0) or error (< 0)
  * @get_config_size:		Get the size of the configuration space includes
  *				fields that are conditional on feature bits.
  *				@vdev: vdpa device
@@ -319,6 +322,7 @@ struct vdpa_config_ops {
 	u8 (*get_status)(struct vdpa_device *vdev);
 	void (*set_status)(struct vdpa_device *vdev, u8 status);
 	int (*reset)(struct vdpa_device *vdev);
+	int (*suspend)(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);
-- 
2.31.1