The branch main has been updated by adrian:
URL:
https://cgit.FreeBSD.org/src/commit/?id=b73f52a0344d0f18207ef51397ceded3ffe58cd0
commit b73f52a0344d0f18207ef51397ceded3ffe58cd0
Author: Adrian Chadd <adr...@freebsd.org>
AuthorDate: 2025-06-09 02:09:37 +0000
Commit: Adrian Chadd <adr...@freebsd.org>
CommitDate: 2025-09-09 01:46:42 +0000
rsu: implement A-MPDU TX; add TODO items for further work
* Enable A-MPDU TX by fixing the A-MPDU TX establish routine;
always assign sequence numbers from net80211 (for now); and
fix the descriptor programming.
* Add TODO items around CAM allocation for keys, MAC ID stuff which
we likely need to fix for working IBSS/AP behaviour, and whatever
other bits and pieces I noticed.
* Disable amsdu2ampdu, we can decap A-MSDU just fine in net80211,
doubly so if we somehow get A-MSDU inside an A-MPDU.
I've tested / verified that A-MPDU TX and A-MPDU RX is correctly
established and functioning by using rtwn in monitor mode.
I used an old r92su linux out of tree driver for comparison.
Differential Revision: https://reviews.freebsd.org/D50748
Okayed by: bz
---
sys/dev/usb/wlan/if_rsu.c | 62 ++++++++++++++++++++++++++++++--------------
sys/dev/usb/wlan/if_rsureg.h | 9 ++++++-
2 files changed, 51 insertions(+), 20 deletions(-)
diff --git a/sys/dev/usb/wlan/if_rsu.c b/sys/dev/usb/wlan/if_rsu.c
index ce2b98a1ba55..e976948f6849 100644
--- a/sys/dev/usb/wlan/if_rsu.c
+++ b/sys/dev/usb/wlan/if_rsu.c
@@ -371,18 +371,16 @@ rsu_update_chw(struct ieee80211com *ic)
/*
* notification from net80211 that it'd like to do A-MPDU on the given TID.
- *
- * Note: this actually hangs traffic at the present moment, so don't use it.
- * The firmware debug does indiciate it's sending and establishing a TX AMPDU
- * session, but then no traffic flows.
*/
static int
rsu_ampdu_enable(struct ieee80211_node *ni, struct ieee80211_tx_ampdu *tap)
{
-#if 0
struct rsu_softc *sc = ni->ni_ic->ic_softc;
struct r92s_add_ba_req req;
+ RSU_DPRINTF(sc, RSU_DEBUG_AMPDU, "%s: called, tid=%d\n",
+ __func__, tap->txa_tid);
+
/* Don't enable if it's requested or running */
if (IEEE80211_AMPDU_REQUESTED(tap))
return (0);
@@ -397,23 +395,30 @@ rsu_ampdu_enable(struct ieee80211_node *ni, struct
ieee80211_tx_ampdu *tap)
return (0);
/* Send the firmware command */
- RSU_DPRINTF(sc, RSU_DEBUG_AMPDU, "%s: establishing AMPDU TX for TID
%d\n",
+ RSU_DPRINTF(sc, RSU_DEBUG_AMPDU,
+ "%s: establishing AMPDU TX for TID %d\n",
__func__,
tap->txa_tid);
RSU_LOCK(sc);
- if (rsu_fw_cmd(sc, R92S_CMD_ADDBA_REQ, &req, sizeof(req)) != 1) {
+ if (rsu_fw_cmd(sc, R92S_CMD_ADDBA_REQ, &req, sizeof(req)) != 0) {
RSU_UNLOCK(sc);
+ RSU_DPRINTF(sc, RSU_DEBUG_AMPDU, "%s: AMPDU TX cmd failure\n",
+ __func__);
/* Mark failure */
- (void) ieee80211_ampdu_tx_request_active_ext(ni, tap->txa_tid,
0);
+ ieee80211_ampdu_tx_request_active_ext(ni, tap->txa_tid, 0);
+ /* Return 0, we've been driving this ourselves */
return (0);
}
RSU_UNLOCK(sc);
+ RSU_DPRINTF(sc, RSU_DEBUG_AMPDU, "%s: AMPDU TX cmd success\n",
+ __func__);
+
/* Mark success; we don't get any further notifications */
- (void) ieee80211_ampdu_tx_request_active_ext(ni, tap->txa_tid, 1);
-#endif
- /* Return 0, we're driving this ourselves */
+ ieee80211_ampdu_tx_request_active_ext(ni, tap->txa_tid, 1);
+
+ /* Return 0, we've been driving this ourselves */
return (0);
}
@@ -563,9 +568,7 @@ rsu_attach(device_t self)
/* Enable basic HT */
ic->ic_htcaps = IEEE80211_HTC_HT |
-#if 0
IEEE80211_HTC_AMPDU |
-#endif
IEEE80211_HTC_AMSDU |
IEEE80211_HTCAP_MAXAMSDU_3839 |
IEEE80211_HTCAP_SMPS_OFF;
@@ -1538,6 +1541,10 @@ rsu_key_alloc(struct ieee80211vap *vap, struct
ieee80211_key *k,
is_checked = 1;
k->wk_flags |= IEEE80211_KEY_SWCRYPT;
} else
+ /*
+ * TODO: should allocate these from the CAM space;
+ * skipping over the fixed slots and _BC / _BSS.
+ */
*keyix = R92S_MACID_BSS;
}
@@ -2167,7 +2174,7 @@ rsu_event_addba_req_report(struct rsu_softc *sc, uint8_t
*buf, int len)
__func__,
ether_sprintf(ba->mac_addr),
(int) ba->tid,
- (int) le16toh(ba->ssn));
+ (int) le16toh(ba->ssn) >> 4);
/* XXX do node lookup; this is STA specific */
@@ -2213,6 +2220,11 @@ rsu_rx_event(struct rsu_softc *sc, uint8_t code, uint8_t
*buf, int len)
if (vap->iv_state == IEEE80211_S_AUTH)
rsu_event_join_bss(sc, buf, len);
break;
+
+ /* TODO: what about R92S_EVT_ADD_STA? and decoding macid? */
+ /* It likely is required for IBSS/AP mode */
+
+ /* TODO: should I be doing this transition in AP mode? */
case R92S_EVT_DEL_STA:
RSU_DPRINTF(sc, RSU_DEBUG_FWCMD | RSU_DEBUG_STATE,
"%s: disassociated from %s\n", __func__,
@@ -2230,6 +2242,7 @@ rsu_rx_event(struct rsu_softc *sc, uint8_t code, uint8_t
*buf, int len)
break;
case R92S_EVT_FWDBG:
buf[60] = '\0';
+ /* TODO: some are \n terminated, some aren't, sigh */
RSU_DPRINTF(sc, RSU_DEBUG_FWDBG, "FWDBG: %s\n", (char *)buf);
break;
case R92S_EVT_ADDBA_REQ_REPORT:
@@ -2842,8 +2855,10 @@ rsu_tx_start(struct rsu_softc *sc, struct ieee80211_node
*ni,
SM(R92S_TXDW0_OFFSET, sizeof(*txd)) |
R92S_TXDW0_OWN | R92S_TXDW0_FSG | R92S_TXDW0_LSG);
+ /* TODO: correct macid here? It should be in the node */
txd->txdw1 |= htole32(
SM(R92S_TXDW1_MACID, R92S_MACID_BSS) | SM(R92S_TXDW1_QSEL, qid));
+
if (!hasqos)
txd->txdw1 |= htole32(R92S_TXDW1_NONQOS);
if (k != NULL && !(k->wk_flags & IEEE80211_KEY_SWENCRYPT)) {
@@ -2864,8 +2879,13 @@ rsu_tx_start(struct rsu_softc *sc, struct ieee80211_node
*ni,
SM(R92S_TXDW1_CIPHER, cipher) |
SM(R92S_TXDW1_KEYIDX, k->wk_keyix));
}
- /* XXX todo: set AGGEN bit if appropriate? */
- txd->txdw2 |= htole32(R92S_TXDW2_BK);
+
+ /*
+ * Note: no need to set TXDW2_AGGEN/TXDW2_BK to mark
+ * A-MPDU and non-AMPDU candidates; the firmware will
+ * handle this for us.
+ */
+
if (ismcast)
txd->txdw2 |= htole32(R92S_TXDW2_BMCAST);
@@ -2884,8 +2904,11 @@ rsu_tx_start(struct rsu_softc *sc, struct ieee80211_node
*ni,
}
/*
- * Firmware will use and increment the sequence number for the
- * specified priority.
+ * Pass in prio here, NOT the sequence number.
+ *
+ * The hardware is in theory incrementing sequence numbers
+ * for us, but I haven't yet figured out exactly when/how
+ * it's supposed to work.
*/
txd->txdw3 |= htole32(SM(R92S_TXDW3_SEQ, prio));
@@ -3485,7 +3508,8 @@ rsu_load_firmware(struct rsu_softc *sc)
dmem.vcs_mode = R92S_VCS_MODE_RTS_CTS;
dmem.turbo_mode = 0;
dmem.bw40_en = !! (ic->ic_htcaps & IEEE80211_HTCAP_CHWIDTH40);
- dmem.amsdu2ampdu_en = !! (sc->sc_ht);
+ /* net80211 handles AMSDUs just fine */
+ dmem.amsdu2ampdu_en = 0;
dmem.ampdu_en = !! (sc->sc_ht);
dmem.agg_offload = !! (sc->sc_ht);
dmem.qos_en = 1;
diff --git a/sys/dev/usb/wlan/if_rsureg.h b/sys/dev/usb/wlan/if_rsureg.h
index fb706a4d9b1a..e2074e1dd2ad 100644
--- a/sys/dev/usb/wlan/if_rsureg.h
+++ b/sys/dev/usb/wlan/if_rsureg.h
@@ -593,7 +593,14 @@ struct r92s_event_join_bss {
struct ndis_wlan_bssid_ex bss;
} __packed;
-#define R92S_MACID_BSS 5 /* XXX hardcoded somewhere */
+/*
+ * This is hard-coded in the firmware for a STA mode
+ * BSS join. If you turn on FWDEBUG, you'll see this
+ * in the logs:
+ *
+ * rsu0: FWDBG: mac id #5: 0000005b, 000fffff, 00000000
+ */
+#define R92S_MACID_BSS 5
/* Rx MAC descriptor. */
struct r92s_rx_stat {
