svn commit: r288999 - head/sys/dev/wpi
Adrian Chadd
adrian at FreeBSD.org
Thu Oct 8 00:52:43 UTC 2015
Author: adrian
Date: Thu Oct 8 00:52:41 2015
New Revision: 288999
URL: https://svnweb.freebsd.org/changeset/base/288999
Log:
wpi(4): remove software queues
Use direct dispatch into the destination hardware ring instead of using
a staging queue.
Submitted by: <s3erios at gmail.com>
Differential Revision: https://reviews.freebsd.org/D3757
Modified:
head/sys/dev/wpi/if_wpi.c
head/sys/dev/wpi/if_wpivar.h
Modified: head/sys/dev/wpi/if_wpi.c
==============================================================================
--- head/sys/dev/wpi/if_wpi.c Thu Oct 8 00:48:29 2015 (r288998)
+++ head/sys/dev/wpi/if_wpi.c Thu Oct 8 00:52:41 2015 (r288999)
@@ -206,7 +206,6 @@ static int wpi_tx_data_raw(struct wpi_so
static int wpi_raw_xmit(struct ieee80211_node *, struct mbuf *,
const struct ieee80211_bpf_params *);
static int wpi_transmit(struct ieee80211com *, struct mbuf *);
-static void wpi_start(void *, int);
static void wpi_watchdog_rfkill(void *);
static void wpi_scan_timeout(void *);
static void wpi_tx_timeout(void *);
@@ -525,7 +524,6 @@ wpi_attach(device_t dev)
TASK_INIT(&sc->sc_reinittask, 0, wpi_hw_reset, sc);
TASK_INIT(&sc->sc_radiooff_task, 0, wpi_radio_off, sc);
TASK_INIT(&sc->sc_radioon_task, 0, wpi_radio_on, sc);
- TASK_INIT(&sc->sc_start_task, 0, wpi_start, sc);
sc->sc_tq = taskqueue_create("wpi_taskq", M_WAITOK,
taskqueue_thread_enqueue, &sc->sc_tq);
@@ -685,7 +683,6 @@ wpi_detach(device_t dev)
if (ic->ic_vap_create == wpi_vap_create) {
ieee80211_draintask(ic, &sc->sc_radioon_task);
- ieee80211_draintask(ic, &sc->sc_start_task);
wpi_stop(sc);
@@ -1165,7 +1162,6 @@ wpi_alloc_tx_ring(struct wpi_softc *sc,
ring->queued = 0;
ring->cur = 0;
ring->update = 0;
- mbufq_init(&ring->snd, ifqmaxlen);
DPRINTF(sc, WPI_DEBUG_TRACE, TRACE_STR_BEGIN, __func__);
@@ -1293,8 +1289,6 @@ wpi_reset_tx_ring(struct wpi_softc *sc,
memset(ring->desc, 0, ring->desc_dma.size);
bus_dmamap_sync(ring->desc_dma.tag, ring->desc_dma.map,
BUS_DMASYNC_PREWRITE);
- mbufq_drain(&ring->snd);
- sc->qfullmsk &= ~(1 << ring->qid);
ring->queued = 0;
ring->cur = 0;
ring->update = 0;
@@ -2104,16 +2098,9 @@ wpi_tx_done(struct wpi_softc *sc, struct
ieee80211_tx_complete(ni, m, (status & WPI_TX_STATUS_FAIL) != 0);
WPI_TXQ_STATE_LOCK(sc);
- ring->queued -= 1;
- if (ring->queued > 0) {
+ if (--ring->queued > 0)
callout_reset(&sc->tx_timeout, 5*hz, wpi_tx_timeout, sc);
-
- if ((sc->qfullmsk & (1 << ring->qid)) != 0 &&
- ring->queued < WPI_TX_RING_LOMARK) {
- sc->qfullmsk &= ~(1 << ring->qid);
- ieee80211_runtask(ic, &sc->sc_start_task);
- }
- } else
+ else
callout_stop(&sc->tx_timeout);
WPI_TXQ_STATE_UNLOCK(sc);
@@ -2692,10 +2679,8 @@ wpi_cmd2(struct wpi_softc *sc, struct wp
sc->sc_update_tx_ring(sc, ring);
if (ring->qid < WPI_CMD_QUEUE_NUM) {
- /* Mark TX ring as full if we reach a certain threshold. */
WPI_TXQ_STATE_LOCK(sc);
- if (++ring->queued > WPI_TX_RING_HIMARK)
- sc->qfullmsk |= 1 << ring->qid;
+ ring->queued++;
callout_reset(&sc->tx_timeout, 5*hz, wpi_tx_timeout, sc);
WPI_TXQ_STATE_UNLOCK(sc);
}
@@ -3063,7 +3048,6 @@ wpi_transmit(struct ieee80211com *ic, st
{
struct wpi_softc *sc = ic->ic_softc;
struct ieee80211_node *ni;
- struct mbufq *sndq;
int ac, error;
WPI_TX_LOCK(sc);
@@ -3077,10 +3061,8 @@ wpi_transmit(struct ieee80211com *ic, st
/* Check for available space. */
ac = M_WME_GETAC(m);
- sndq = &sc->txq[ac].snd;
- if (wpi_tx_ring_is_full(sc, ac) || mbufq_len(sndq) != 0) {
- /* wpi_tx_done() will dequeue it. */
- error = mbufq_enqueue(sndq, m);
+ if (wpi_tx_ring_is_full(sc, ac)) {
+ error = ENOBUFS;
goto unlock;
}
@@ -3097,44 +3079,6 @@ unlock: WPI_TX_UNLOCK(sc);
return (error);
}
-/**
- * Process data waiting to be sent on the output queue
- */
-static void
-wpi_start(void *arg0, int pending)
-{
- struct wpi_softc *sc = arg0;
- struct ieee80211_node *ni;
- struct mbuf *m;
- uint8_t i;
-
- WPI_TX_LOCK(sc);
- if (sc->sc_running == 0)
- goto unlock;
-
- DPRINTF(sc, WPI_DEBUG_XMIT, "%s: called\n", __func__);
-
- for (i = 0; i < WPI_CMD_QUEUE_NUM; i++) {
- struct mbufq *sndq = &sc->txq[i].snd;
-
- for (;;) {
- if (wpi_tx_ring_is_full(sc, i))
- break;
-
- if ((m = mbufq_dequeue(sndq)) == NULL)
- break;
-
- ni = (struct ieee80211_node *)m->m_pkthdr.rcvif;
- if (wpi_tx_data(sc, m, ni) != 0) {
- wpi_handle_tx_failure(ni);
- }
- }
- }
-
- DPRINTF(sc, WPI_DEBUG_XMIT, "%s: done\n", __func__);
-unlock: WPI_TX_UNLOCK(sc);
-}
-
static void
wpi_watchdog_rfkill(void *arg)
{
Modified: head/sys/dev/wpi/if_wpivar.h
==============================================================================
--- head/sys/dev/wpi/if_wpivar.h Thu Oct 8 00:48:29 2015 (r288998)
+++ head/sys/dev/wpi/if_wpivar.h Thu Oct 8 00:52:41 2015 (r288999)
@@ -72,7 +72,6 @@ struct wpi_tx_ring {
struct wpi_tx_cmd *cmd;
struct wpi_tx_data data[WPI_TX_RING_COUNT];
bus_dma_tag_t data_dmat;
- struct mbufq snd;
int qid;
int queued;
int cur;
@@ -188,7 +187,6 @@ struct wpi_softc {
/* TX Thermal Callibration. */
struct callout calib_to;
- int calib_cnt;
struct callout scan_timeout;
struct callout tx_timeout;
@@ -212,7 +210,6 @@ struct wpi_softc {
struct mtx rxon_mtx;
int temp;
- uint32_t qfullmsk;
uint32_t nodesmsk;
struct mtx nt_mtx;
@@ -235,7 +232,6 @@ struct wpi_softc {
struct task sc_reinittask;
struct task sc_radiooff_task;
struct task sc_radioon_task;
- struct task sc_start_task;
/* Taskqueue */
struct taskqueue *sc_tq;
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