Implement a sequential descriptor ID value and stuff it in the ath_buf.

This will be used by the EDMA TX code to assign descriptor IDs in order
to provide some debugging.

2 files changed, 10 insertions, 0 deletions

diff --git a/sys/dev/ath/if_ath.c b/sys/dev/ath/if_ath.c
index 3977c16a..ed4b3c3 100644
--- a/sys/dev/ath/if_ath.c
+++ b/sys/dev/ath/if_ath.c
@@ -2344,6 +2344,14 @@ _ath_getbuf_locked(struct ath_softc *sc, ath_buf_type_t btype)
 	bf->bf_comp = NULL;	/* XXX again, just to be sure */
 	bzero(&bf->bf_state, sizeof(bf->bf_state));
 
+	/*
+	 * Track the descriptor ID only if doing EDMA
+	 */
+	if (sc->sc_isedma) {
+		bf->bf_descid = sc->sc_txbuf_descid;
+		sc->sc_txbuf_descid++;
+	}
+
 	return bf;
 }
 
diff --git a/sys/dev/ath/if_athvar.h b/sys/dev/ath/if_athvar.h
index 617ebf8..fa3ca4b 100644
--- a/sys/dev/ath/if_athvar.h
+++ b/sys/dev/ath/if_athvar.h
@@ -191,6 +191,7 @@ struct ath_buf {
 	int			bf_nseg;
 	HAL_STATUS		bf_rxstatus;
 	uint16_t		bf_flags;	/* status flags (below) */
+	uint16_t		bf_descid;	/* 16 bit descriptor ID */
 	struct ath_desc		*bf_desc;	/* virtual addr of desc */
 	struct ath_desc_status	bf_status;	/* tx/rx status */
 	bus_addr_t		bf_daddr;	/* physical addr of desc */
@@ -576,6 +577,7 @@ struct ath_softc {
 	u_int			sc_monpass;	/* frames to pass in mon.mode */
 
 	struct ath_descdma	sc_txdma;	/* TX descriptors */
+	uint16_t		sc_txbuf_descid;
 	ath_bufhead		sc_txbuf;	/* transmit buffer */
 	int			sc_txbuf_cnt;	/* how many buffers avail */
 	struct ath_descdma	sc_txdma_mgmt;	/* mgmt TX descriptors */