Move session state from on-card memory to host memory so we no longer are

constrained to a small number of sessions by the small on-card memories found
in newer devices.  This is really a stopgap solution as having session state
in main memory incurs a (small but noticeable) performance penalty. The better
solution is to manage session state so that it's cached on chip.

Obtained from:	openbsd

1 files changed, 3 insertions, 8 deletions

diff --git a/sys/dev/hifn/hifn7751var.h b/sys/dev/hifn/hifn7751var.h
index b40b819..e3bd2f6 100644
--- a/sys/dev/hifn/hifn7751var.h
+++ b/sys/dev/hifn/hifn7751var.h
@@ -111,8 +111,7 @@ struct hifn_dma {
 };
 
 struct hifn_session {
-	int hs_state;
-	int hs_prev_op; /* XXX collapse into hs_flags? */
+	int hs_used;
 	u_int8_t hs_iv[HIFN_MAX_IV_LENGTH];
 };
 
@@ -130,11 +129,6 @@ struct hifn_session {
 #define	HIFN_RES_SYNC(sc, i, f)						\
 	bus_dmamap_sync((sc)->sc_dmat, (sc)->sc_dmamap, (f))
 
-/* We use a state machine to on sessions */
-#define	HS_STATE_FREE	0		/* unused session entry */
-#define	HS_STATE_USED	1		/* allocated, but key not on card */
-#define	HS_STATE_KEY	2		/* allocated and key is on card */
-
 /*
  * Holds data specific to a single HIFN board.
  */
@@ -164,6 +158,8 @@ struct hifn_softc {
 	int			sc_dmansegs;
 	int32_t			sc_cid;
 	int			sc_maxses;
+	int			sc_nsessions;
+	struct hifn_session	*sc_sessions;
 	int			sc_ramsize;
 	int			sc_flags;
 #define	HIFN_HAS_RNG		0x1	/* includes random number generator */
@@ -186,7 +182,6 @@ struct hifn_softc {
 	int			sc_needwakeup;	/* ops q'd wating on resources */
 	int			sc_curbatch;	/* # ops submitted w/o int */
 	int			sc_suspended;
-	struct hifn_session	sc_sessions[2048];
 };
 
 #define	HIFN_LOCK(_sc)		mtx_lock(&(_sc)->sc_mtx)