[SCSI] libosd: OSD version 2 Support

[karo-tx-linux.git] / include / scsi / osd_initiator.h

diff --git a/include/scsi/osd_initiator.h b/include/scsi/osd_initiator.h
index e84dc7aa5e34fa7b6130b2932612feb042bba760..8482777416d85c507379486c566def93a41a19ad 100644 (file)
--- a/include/scsi/osd_initiator.h
+++ b/include/scsi/osd_initiator.h
@@ -21,6 +21,23 @@
 
 /* Note: "NI" in comments below means "Not Implemented yet" */
 
+/* Configure of code:
+ * #undef if you *don't* want OSD v1 support in runtime.
+ * If #defined the initiator will dynamically configure to encode OSD v1
+ * CDB's if the target is detected to be OSD v1 only.
+ * OSD v2 only commands, options, and attributes will be ignored if target
+ * is v1 only.
+ * If #defined will result in bigger/slower code (OK Slower maybe not)
+ * Q: Should this be CONFIG_SCSI_OSD_VER1_SUPPORT and set from Kconfig?
+ */
+#define OSD_VER1_SUPPORT y
+
+enum osd_std_version {
+       OSD_VER_NONE = 0,
+       OSD_VER1 = 1,
+       OSD_VER2 = 2,
+};
+
 /*
  * Object-based Storage Device.
  * This object represents an OSD device.
@@ -31,6 +48,10 @@
 struct osd_dev {
        struct scsi_device *scsi_device;
        unsigned def_timeout;
+
+#ifdef OSD_VER1_SUPPORT
+       enum osd_std_version version;
+#endif
 };
 
 /* Retrieve/return osd_dev(s) for use by Kernel clients */
@@ -46,6 +67,14 @@ void osduld_unregister_test(unsigned ioctl);
 void osd_dev_init(struct osd_dev *od, struct scsi_device *scsi_device);
 void osd_dev_fini(struct osd_dev *od);
 
+/* we might want to use function vector in the future */
+static inline void osd_dev_set_ver(struct osd_dev *od, enum osd_std_version v)
+{
+#ifdef OSD_VER1_SUPPORT
+       od->version = v;
+#endif
+}
+
 struct osd_request;
 typedef void (osd_req_done_fn)(struct osd_request *or, void *private);
 
@@ -82,6 +111,16 @@ struct osd_request {
        int async_error;
 };
 
+/* OSD Version control */
+static inline bool osd_req_is_ver1(struct osd_request *or)
+{
+#ifdef OSD_VER1_SUPPORT
+       return or->osd_dev->version == OSD_VER1;
+#else
+       return false;
+#endif
+}
+
 /*
  * How to use the osd library:
  *