Begin to implement target mode that for Fibre Channel has a private

per-command component that we *don't* try and pass thru CAM. CAM just
is too risky and too much of a pain- structures get copied, but not
all info of interest can be considered safely transported thru all
consumers (including user space) from the incoming ATIO to the outgoing
CTIO- it's just much safer to have a buddy structure, identified by the
command's tag which *does* make it thru safely.

Pay attention to link speed and report 200MB/s xfer speed for a
23XX card in 2GPs mode.

MFC after:	1 week

1 files changed, 9 insertions, 0 deletions

diff --git a/sys/dev/isp/isp_freebsd.h b/sys/dev/isp/isp_freebsd.h
index 91b837d..67abd62 100644
--- a/sys/dev/isp/isp_freebsd.h
+++ b/sys/dev/isp/isp_freebsd.h
@@ -66,6 +66,14 @@
 typedef void ispfwfunc __P((int, int, int, const u_int16_t **));
 
 #ifdef	ISP_TARGET_MODE
+#define	ATPDPSIZE	256
+typedef struct {
+	u_int32_t	orig_datalen;
+	u_int32_t	bytes_xfered;
+	u_int32_t	last_xframt;
+	u_int32_t	tag;
+} atio_private_data_t;
+
 typedef struct tstate {
 	struct tstate *next;
 	struct cam_path *owner;
@@ -112,6 +120,7 @@ struct isposinfo {
 	u_int16_t		rollinfo;
 	tstate_t		tsdflt[2];	/* two busses */
 	tstate_t		*lun_hash[LUN_HASH_SIZE];
+	atio_private_data_t	atpdp[ATPDPSIZE];
 #endif
 };