dm: virtio: add support for VBS-K device reset

chejianj · lijinxia · commit 1378a8440a35 · 2018-08-16T16:22:43.000+08:00
A new ioctl is introduced in VBS-K to issue reset command to kernel
VBS-K driver. This is used to support VBS-K S3. When FE enters S3
reset command is sent to device model. Backend driver in device model
should use this ioctl to inform the VBS-K drvier in kernel.

Signed-off-by: Jian Jun Chen &lt;jian.jun.chen@intel.com&gt;
Reviewed-by: Shuo Liu &lt;shuo.a.liu@intel.com&gt;
Acked-by: Yu Wang &lt;yu1.wang@intel.com&gt;
diff --git a/devicemodel/hw/pci/virtio/virtio_kernel.c b/devicemodel/hw/pci/virtio/virtio_kernel.c
@@ -38,7 +38,7 @@ vbs_kernel_init(int fd)
 int
 vbs_kernel_reset(int fd)
 {
-	return VIRTIO_SUCCESS;
+	return ioctl(fd, VBS_K_RESET_DEV, NULL);
 }
 
 /*
diff --git a/devicemodel/include/vbs_common_if.h b/devicemodel/include/vbs_common_if.h
@@ -43,5 +43,6 @@ struct vbs_dev_info {
 
 #define VBS_K_SET_DEV _IOW(VBS_K_IOCTL, 0x00, struct vbs_dev_info)
 #define VBS_K_SET_VQ _IOW(VBS_K_IOCTL, 0x01, struct vbs_vqs_info)
+#define VBS_K_RESET_DEV _IO(VBS_K_IOCTL, 0x02)
 
 #endif /* _VBS_COMMON_IF_H_ */

Original file line number	Diff line number	Diff line change
`@@ -38,7 +38,7 @@ vbs_kernel_init(int fd)`
`38`	`38`	`int`
`39`	`39`	`vbs_kernel_reset(int fd)`
`40`	`40`	`{`
`41`		`- return VIRTIO_SUCCESS;`
	`41`	`+ return ioctl(fd, VBS_K_RESET_DEV, NULL);`
`42`	`42`	`}`
`43`	`43`
`44`	`44`	`/*`