wifi: ath9k: Add PTP patch from wifi-ptp project

drivers/net/wireless/ath/ath9k/Makefile

@@ -10,7 +10,7 @@ ath9k-y +=	beacon.o \
 		channel.o
 
 ath9k-$(CONFIG_ATH9K_BTCOEX_SUPPORT) += mci.o
-ath9k-$(CONFIG_ATH9K_PCI) += pci.o
+ath9k-$(CONFIG_ATH9K_PCI) += pci.o ptp.o
 ath9k-$(CONFIG_ATH9K_AHB) += ahb.o
 ath9k-$(CONFIG_ATH9K_DFS_DEBUGFS) += dfs_debug.o
 ath9k-$(CONFIG_ATH9K_DFS_CERTIFIED) += dfs.o

drivers/net/wireless/ath/ath9k/ath9k.h

@@ -24,7 +24,12 @@
 #include <linux/leds.h>
 #include <linux/completion.h>
 #include <linux/time.h>
+#include <linux/ktime.h>
+#include <linux/timecounter.h>
 #include <linux/hw_random.h>
+#include <linux/ptp_clock_kernel.h>
+#include <linux/ptp_classify.h>
+#include <linux/hrtimer.h>
 
 #include "common.h"
 #include "debug.h"
@@ -109,7 +114,7 @@
 /* minimum h/w qdepth to be sustained to maximize aggregation */
 #define ATH_AGGR_MIN_QDEPTH        2
 /* minimum h/w qdepth for non-aggregated traffic */
-#define ATH_NON_AGGR_MIN_QDEPTH    8
+#define ATH_NON_AGGR_MIN_QDEPTH    32
 #define ATH_HW_CHECK_POLL_INT      1000
 #define ATH_TXFIFO_DEPTH           8
 #define ATH_TX_ERROR               0x01
@@ -579,7 +584,7 @@
 u32 ath_calcrxfilter(struct ath_softc *sc);
 int ath_rx_init(struct ath_softc *sc, int nbufs);
 void ath_rx_cleanup(struct ath_softc *sc);
-int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp);
+int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp, ktime_t *tstamp);
 struct ath_txq *ath_txq_setup(struct ath_softc *sc, int qtype, int subtype);
 void ath_txq_unlock_complete(struct ath_softc *sc, struct ath_txq *txq);
 void ath_tx_cleanupq(struct ath_softc *sc, struct ath_txq *txq);
@@ -601,7 +606,7 @@
 void ath_tx_cabq(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 		 struct sk_buff *skb);
 void ath_tx_tasklet(struct ath_softc *sc);
-void ath_tx_edma_tasklet(struct ath_softc *sc);
+void ath_tx_edma_tasklet(struct ath_softc *sc, ktime_t *tstamp);
 int ath_tx_aggr_start(struct ath_softc *sc, struct ieee80211_sta *sta,
 		      u16 tid, u16 *ssn);
 void ath_tx_aggr_stop(struct ath_softc *sc, struct ieee80211_sta *sta, u16 tid);
@@ -1018,12 +1023,27 @@
 
 	u8 gtt_cnt;
 	u32 intrstatus;
-	u16 ps_flags; /* PS_* */
+	ktime_t intrtstamp;
+    	u16 ps_flags; /* PS_* */
 	bool ps_enabled;
 	bool ps_idle;
 	short nbcnvifs;
 	unsigned long ps_usecount;
 
+	spinlock_t systim_lock;
+	struct cyclecounter cc;
+	struct timecounter tc;
+	struct ptp_clock *ptp_clock;
+	struct ptp_clock_info ptp_clock_info;
+	u32    cc_mult;
+	struct hrtimer off_timer;
+	ktime_t off_interval;
+	u32    off_counter;
+	s64    off_last;
+	u64    off_base_time;
+
+	u64 ptp_dirtyts;
+
 	struct ath_rx rx;
 	struct ath_tx tx;
 	struct ath_beacon beacon;
@@ -1152,4 +1172,9 @@
 static inline void ath_ahb_exit(void) {};
 #endif
 
+void ath9k_ptp_init(struct ath_softc *sc);
+void ath9k_ptp_remove(struct ath_softc *sc);
+void ath9k_cyc2hwtstamp(struct ath_softc *sc, struct skb_shared_hwtstamps *hwtstamps, u32 cycle);
+#define ATH9K_PTP_FAKE_SHIFT 21
+
 #endif /* ATH9K_H */

drivers/net/wireless/ath/ath9k/beacon.c

@@ -314,8 +314,8 @@ static int ath9k_beacon_choose_slot(struct ath_softc *sc)
 
 	if (sc->sc_ah->opmode != NL80211_IFTYPE_AP &&
 	    sc->sc_ah->opmode != NL80211_IFTYPE_MESH_POINT) {
-		ath_dbg(common, BEACON, "slot 0, tsf: %llu\n",
-			ath9k_hw_gettsf64(sc->sc_ah));
+//		ath_dbg(common, BEACON, "slot 0, tsf: %llu\n",
+//			ath9k_hw_gettsf64(sc->sc_ah));
 		return 0;
 	}
 

drivers/net/wireless/ath/ath9k/debug.c

@@ -121,6 +121,91 @@
 
 #endif
 
+static ssize_t read_file_dirtyts(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) {
+    struct ath_softc *sc = file->private_data;
+    u8 buf[sizeof(u64)];
+
+    memcpy(buf, &sc->ptp_dirtyts, sizeof buf);
+    return simple_read_from_buffer(user_buf, count, ppos, buf, sizeof buf);
+}
+
+static ssize_t write_file_dirtyts(struct file *file, const char __user *user_buf,
+                size_t count, loff_t *ppos) {
+    struct ath_softc *sc = file->private_data;
+    u8 buf[sizeof(u64)];
+    ssize_t len;
+    u64 dirty_cycle;
+    u32 raw_tsf;
+    s64 delta;
+    s64 dirty_ns;
+    unsigned long flags;
+    u32 remain;
+
+    len = simple_write_to_buffer(buf, sizeof buf, ppos, user_buf, count);
+    if (len < 0) {
+        return len;
+    }
+    if (len < sizeof buf) {
+        return -EINVAL;
+    }
+
+    memcpy(&dirty_cycle, buf, sizeof buf);
+    raw_tsf = (dirty_cycle >> 32);
+    remain = dirty_cycle & 0xffffffffU;
+
+    spin_lock_irqsave(&sc->systim_lock, flags);
+    dirty_ns = timecounter_cyc2time(&sc->tc, raw_tsf);
+    delta = 0;
+    if (remain) {
+        u64 frac = 0;
+        delta = cyclecounter_cyc2ns(&sc->cc, 1, sc->cc.mask, &frac);
+        delta = delta * remain / 1000;
+    }
+    spin_unlock_irqrestore(&sc->systim_lock, flags);
+
+    dirty_ns += delta;
+    sc->ptp_dirtyts = dirty_ns;
+
+    return len;
+}
+
+static const struct file_operations fops_dirtyts = {
+	.read = read_file_dirtyts,
+	.write = write_file_dirtyts,
+	.open = simple_open,
+	.owner = THIS_MODULE,
+	.llseek = default_llseek,
+};
+
+static ssize_t read_file_trigger_cbr(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) {
+    return -EINVAL;
+}
+
+static ssize_t write_file_trigger_cbr(struct file *file, const char __user *user_buf,
+                size_t count, loff_t *ppos) {
+    struct ath_softc *sc = file->private_data;
+    struct ath_hw *ah = sc->sc_ah;
+
+    if (count & 1) {
+        printk("ath9k: cbr open\n");
+//        REG_RMW(ah, AR_QMISC(ATH_TXQ_AC_VI), AR_Q_MISC_FSP_CBR, AR_Q_MISC_FSP);
+        REG_WRITE(ah, AR_QCBRCFG(ATH_TXQ_AC_VI), 0xc350);
+    } else {
+        printk("ath9k: cbr gated\n");
+//        REG_RMW(ah, AR_QMISC(ATH_TXQ_AC_VI), 0x4, AR_Q_MISC_FSP);
+    }
+
+    return count;
+}
+
+static const struct file_operations fops_trigger_cbr = {
+	.read = read_file_trigger_cbr,
+	.write = write_file_trigger_cbr,
+	.open = simple_open,
+	.owner = THIS_MODULE,
+	.llseek = default_llseek,
+};
+
 #define DMA_BUF_LEN 1024
 
 
@@ -1427,6 +1512,12 @@
 				    sc->debug.debugfs_phy,
 				    read_file_dump_nfcal);
 
+    debugfs_create_file("dirtyts", 0600, sc->debug.debugfs_phy,
+                sc, &fops_dirtyts);
+
+    debugfs_create_file("trigger_cbr", 0600, sc->debug.debugfs_phy,
+                sc, &fops_trigger_cbr);
+
 	ath9k_cmn_debug_base_eeprom(sc->debug.debugfs_phy, sc->sc_ah);
 	ath9k_cmn_debug_modal_eeprom(sc->debug.debugfs_phy, sc->sc_ah);
 

drivers/net/wireless/ath/ath9k/hw.c

@@ -3035,8 +3035,8 @@ EXPORT_SYMBOL(ath9k_hw_gettsf64);
 
 void ath9k_hw_settsf64(struct ath_hw *ah, u64 tsf64)
 {
-	REG_WRITE(ah, AR_TSF_L32, tsf64 & 0xffffffff);
-	REG_WRITE(ah, AR_TSF_U32, (tsf64 >> 32) & 0xffffffff);
+//	REG_WRITE(ah, AR_TSF_L32, tsf64 & 0xffffffff);
+//	REG_WRITE(ah, AR_TSF_U32, (tsf64 >> 32) & 0xffffffff);
 }
 EXPORT_SYMBOL(ath9k_hw_settsf64);
 
@@ -3056,6 +3056,7 @@ void ath9k_hw_set_tsfadjust(struct ath_hw *ah, bool set)
 	if (set)
 		ah->misc_mode |= AR_PCU_TX_ADD_TSF;
 	else
+    //    ;
 		ah->misc_mode &= ~AR_PCU_TX_ADD_TSF;
 }
 EXPORT_SYMBOL(ath9k_hw_set_tsfadjust);

drivers/net/wireless/ath/ath9k/hw.h

@@ -236,7 +236,7 @@
 enum ath_hw_txq_subtype {
 	ATH_TXQ_AC_BK = 0,
 	ATH_TXQ_AC_BE = 1,
-	ATH_TXQ_AC_VI = 2,
+	ATH_TXQ_AC_VI = 5,
 	ATH_TXQ_AC_VO = 3,
 };
 

drivers/net/wireless/ath/ath9k/init.c

@@ -197,8 +197,16 @@ static unsigned int ath9k_ioread32(void *hw_priv, u32 reg_offset)
 		spin_lock_irqsave(&sc->sc_serial_rw, flags);
 		val = ioread32(sc->mem + reg_offset);
 		spin_unlock_irqrestore(&sc->sc_serial_rw, flags);
-	} else
+	} else {
+        /*
+        if (reg_offset == AR_TSF_L32) {
+            printk("ath9k: ioread32 unlock L32");
+        } else if (reg_offset == AR_TSF_U32) {
+            printk("ath9k: ioread32 unlock U32");
+        }
+        */
 		val = ioread32(sc->mem + reg_offset);
+    }
 	return val;
 }
 

drivers/net/wireless/ath/ath9k/mac.c

@@ -369,6 +369,7 @@ bool ath9k_hw_resettxqueue(struct ath_hw *ah, u32 q)
 	struct ath_common *common = ath9k_hw_common(ah);
 	struct ath9k_tx_queue_info *qi;
 	u32 cwMin, chanCwMin, value;
+    int hcfenabled = 0;
 
 	qi = &ah->txq[q];
 	if (qi->tqi_type == ATH9K_TX_QUEUE_INACTIVE) {
@@ -378,6 +379,14 @@ bool ath9k_hw_resettxqueue(struct ath_hw *ah, u32 q)
 
 	ath_dbg(common, QUEUE, "Reset TX queue: %u\n", q);
 
+    if (q == ATH_TXQ_AC_VI) {
+        qi->tqi_cwmin = qi->tqi_cwmax = 0;
+        qi->tqi_aifs = 0;
+        qi->tqi_cbrPeriod = 5000;
+        qi->tqi_cbrOverflowLimit = 0;
+//        hcfenabled = 1;
+    }
+
 	if (qi->tqi_cwmin == ATH9K_TXQ_USEDEFAULT) {
 		chanCwMin = INIT_CWMIN;
 
@@ -413,8 +422,10 @@ bool ath9k_hw_resettxqueue(struct ath_hw *ah, u32 q)
 		REG_SET_BIT(ah, AR_QMISC(q), AR_Q_MISC_FSP_CBR |
 			    (qi->tqi_cbrOverflowLimit ?
 			     AR_Q_MISC_CBR_EXP_CNTR_LIMIT_EN : 0));
+//        REG_SET_BIT(ah, AR_QMISC(q), AR_Q_MISC_ONE_SHOT_EN);
 	}
 	if (qi->tqi_readyTime && (qi->tqi_type != ATH9K_TX_QUEUE_CAB)) {
+        printk("ath9k: tqi set rdytime: %d\n", q);
 		REG_WRITE(ah, AR_QRDYTIMECFG(q),
 			  SM(qi->tqi_readyTime, AR_Q_RDYTIMECFG_DURATION) |
 			  AR_Q_RDYTIMECFG_EN);
@@ -494,6 +505,9 @@ bool ath9k_hw_resettxqueue(struct ath_hw *ah, u32 q)
 		break;
 	}
 
+    if (hcfenabled) {
+        REG_SET_BIT(ah, AR_QMISC(q), 0x00000016);
+    }
 	if (qi->tqi_intFlags & ATH9K_TXQ_USE_LOCKOUT_BKOFF_DIS) {
 		REG_SET_BIT(ah, AR_DMISC(q),
 			    SM(AR_D_MISC_ARB_LOCKOUT_CNTRL_GLOBAL,

drivers/net/wireless/ath/ath9k/main.c

@@ -16,6 +16,7 @@
 
 #include <linux/nl80211.h>
 #include <linux/delay.h>
+#include <linux/ktime.h>
 #include "ath9k.h"
 #include "btcoex.h"
 
@@ -384,10 +385,12 @@ void ath9k_tasklet(struct tasklet_struct *t)
 	unsigned long flags;
 	u32 status;
 	u32 rxmask;
+    ktime_t tstamp;
 
 	spin_lock_irqsave(&sc->intr_lock, flags);
 	status = sc->intrstatus;
 	sc->intrstatus = 0;
+    tstamp = sc->intrtstamp;
 	spin_unlock_irqrestore(&sc->intr_lock, flags);
 
 	ath9k_ps_wakeup(sc);
@@ -436,7 +439,7 @@ void ath9k_tasklet(struct tasklet_struct *t)
 		 * the next Beacon.
 		 */
 		ath_dbg(common, PS, "TSFOOR - Sync with next Beacon\n");
-		sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
+		// sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC;
 	}
 	spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
 
@@ -450,9 +453,9 @@ void ath9k_tasklet(struct tasklet_struct *t)
 		/* Check for high priority Rx first */
 		if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) &&
 		    (status & ATH9K_INT_RXHP))
-			ath_rx_tasklet(sc, 0, true);
+			ath_rx_tasklet(sc, 0, true, &tstamp);
 
-		ath_rx_tasklet(sc, 0, false);
+		ath_rx_tasklet(sc, 0, false, &tstamp);
 	}
 
 	if (status & ATH9K_INT_TX) {
@@ -465,7 +468,7 @@ void ath9k_tasklet(struct tasklet_struct *t)
 			 */
 			sc->gtt_cnt = 0;
 
-			ath_tx_edma_tasklet(sc);
+			ath_tx_edma_tasklet(sc, &tstamp);
 		} else {
 			ath_tx_tasklet(sc);
 		}
@@ -509,6 +512,9 @@ irqreturn_t ath_isr(int irq, void *dev)
 	enum ath9k_int status;
 	u32 sync_cause = 0;
 	bool sched = false;
+    ktime_t isr_tstamp = ktime_get_real();
+
+    //printk("ath9k: ath_isr isr_tstamp=%lld, tsf64=%u\n", isr_tstamp, ath9k_hw_gettsf32(ah));
 
 	/*
 	 * The hardware is not ready/present, don't
@@ -547,6 +553,7 @@ irqreturn_t ath_isr(int irq, void *dev)
 	/* Cache the status */
 	spin_lock(&sc->intr_lock);
 	sc->intrstatus |= status;
+    sc->intrtstamp = isr_tstamp;
 	spin_unlock(&sc->intr_lock);
 
 	if (status & SCHED_INTR)
@@ -760,6 +767,8 @@ static void ath9k_tx(struct ieee80211_hw *hw,
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
 	unsigned long flags;
 
+    ath_warn(common, "ath9k_tx skb=%p, skb->sk=%p\n", skb, skb->sk);
+
 	if (sc->ps_enabled) {
 		/*
 		 * mac80211 does not set PM field for normal data frames, so we
@@ -2837,3 +2846,16 @@ struct ieee80211_ops ath9k_ops = {
 	.get_txpower        = ath9k_get_txpower,
 	.wake_tx_queue      = ath9k_wake_tx_queue,
 };
+
+void ath9k_cyc2hwtstamp(struct ath_softc *sc, struct skb_shared_hwtstamps *hwtstamps, u32 cycle) {
+    u64 ns;
+    unsigned long flags;
+
+    spin_lock_irqsave(&sc->systim_lock, flags);
+    ns = timecounter_cyc2time(&sc->tc, (u64)cycle);
+    spin_unlock_irqrestore(&sc->systim_lock, flags);
+
+    memset(hwtstamps, 0, sizeof(*hwtstamps));
+    hwtstamps->hwtstamp = ns_to_ktime(ns);
+}
+

drivers/net/wireless/ath/ath9k/pci.c

@@ -19,6 +19,7 @@
 #include <linux/nl80211.h>
 #include <linux/pci.h>
 #include <linux/module.h>
+#include <linux/clocksource.h>
 #include "ath9k.h"
 
 static const struct pci_device_id ath_pci_id_table[] = {
@@ -881,6 +882,64 @@ static const struct ath_bus_ops ath_pci_bus_ops = {
 	.aspm_init = ath_pci_aspm_init,
 };
 
+static u64 ath9k_cyclecounter_read(const struct cyclecounter *cc) {
+    struct ath_softc *sc = container_of(cc, struct ath_softc, cc);
+    return ath9k_hw_gettsf32(sc->sc_ah);
+}
+
+static enum hrtimer_restart ath_off_timer_cb(struct hrtimer *t) {
+    struct ath_softc *sc = container_of(t, struct ath_softc, off_timer);
+    struct ath_hw *ah = sc->sc_ah;
+    struct ptp_clock_info *ptp = &sc->ptp_clock_info;
+    ktime_t kt1, kt3;
+    u64 t1, t2, t3;
+    s64 offset;
+    struct timespec64 ts;
+    u64 next;
+    int i;
+
+    if (sc->off_counter == 0) {
+        ath9k_hw_ops(ah)->config_pci_powersave(ah, false);
+    }
+
+    for (i = 0; i < 1024; ++i) {
+        kt1 = ktime_get();
+        ptp->gettime64(ptp, &ts);
+        kt3 = ktime_get();
+        t3 = ktime_to_ns(kt3);
+        t1 = ktime_to_ns(kt1);
+        printk("ath9k timer: %lld\n", t3 - t1);
+    }
+
+    return HRTIMER_NORESTART;
+
+    if (!sc->off_base_time) {
+        sc->off_base_time = ktime_to_ns(ktime_get());
+    }
+
+    next = sc->off_base_time + sc->off_counter * ktime_to_ns(sc->off_interval);
+    hrtimer_forward(t, ns_to_ktime(next), sc->off_interval);
+
+    if (sc->off_counter++ >= 1024) {
+        return HRTIMER_NORESTART;
+    }
+
+    t2 = ath9k_cyclecounter_read(&sc->cc);
+
+    offset = t2 - sc->off_last;
+
+    /*
+    if (t3 - t1 > 3000) {
+        return HRTIMER_RESTART;
+    }
+    */
+
+    printk("ath9k: tsf value = %lld, diff=%lld\n", (s64)t2, offset);
+    sc->off_last = t2;
+
+    return HRTIMER_RESTART;
+}
+
 static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 {
 	struct ath_softc *sc;
@@ -989,6 +1048,25 @@ static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	wiphy_info(hw->wiphy, "%s mem=0x%p, irq=%d\n",
 		   hw_name, sc->mem, pdev->irq);
 
+    sc->cc.read  = ath9k_cyclecounter_read;
+    sc->cc.mask  = CYCLECOUNTER_MASK(32);
+    sc->cc.shift = ATH9K_PTP_FAKE_SHIFT;
+    sc->cc_mult  = clocksource_khz2mult(1000, sc->cc.shift);
+    sc->cc.mult  = sc->cc_mult;
+    spin_lock_init(&sc->systim_lock);
+
+    timecounter_init(&sc->tc, &sc->cc, ktime_to_ns(ktime_get_real()));
+
+    ath9k_ptp_init(sc);
+
+    sc->off_last = 0;
+    sc->off_interval = ktime_set(0, 1000000);
+    sc->off_base_time = 0;
+    sc->off_counter  = 0;
+    hrtimer_init(&sc->off_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+    sc->off_timer.function = &ath_off_timer_cb;
+//    hrtimer_start(&sc->off_timer, ktime_set(30, 0), HRTIMER_MODE_REL);
+
 	return 0;
 
 err_init:
@@ -1003,6 +1081,9 @@ static void ath_pci_remove(struct pci_dev *pdev)
 	struct ieee80211_hw *hw = pci_get_drvdata(pdev);
 	struct ath_softc *sc = hw->priv;
 
+    hrtimer_cancel(&sc->off_timer);
+    ath9k_ptp_remove(sc);
+
 	if (!is_ath9k_unloaded)
 		sc->sc_ah->ah_flags |= AH_UNPLUGGED;
 	ath9k_deinit_device(sc);
@@ -1089,3 +1170,4 @@ void ath_pci_exit(void)
 {
 	pci_unregister_driver(&ath_pci_driver);
 }
+

drivers/net/wireless/ath/ath9k/ptp.c

@@ -0,0 +1,110 @@
+#include "ath9k.h"
+
+#include <linux/ktime.h>
+#include <linux/clocksource.h>
+#include <linux/ptp_clock_kernel.h>
+
+static int ath9k_phc_adjfine(struct ptp_clock_info *ptp, long scaled_ppm) {
+    struct ath_softc *sc = container_of(ptp, struct ath_softc, ptp_clock_info);
+    unsigned long flags;
+
+    spin_lock_irqsave(&sc->systim_lock, flags);
+    timecounter_read(&sc->tc);
+    sc->cc.mult = adjust_by_scaled_ppm(sc->cc_mult, scaled_ppm);
+    spin_unlock_irqrestore(&sc->systim_lock, flags);
+
+    ath_dbg(ath9k_hw_common(sc->sc_ah), CONFIG, "phc adjust scaled_ppm=%ld\n", scaled_ppm);
+
+    return 0;
+}
+
+static int ath9k_phc_adjtime(struct ptp_clock_info *ptp, s64 delta) {
+    struct ath_softc *sc = container_of(ptp, struct ath_softc, ptp_clock_info);
+    unsigned long flags;
+
+    spin_lock_irqsave(&sc->systim_lock, flags);
+    timecounter_adjtime(&sc->tc, delta);
+    spin_unlock_irqrestore(&sc->systim_lock, flags);
+
+    ath_warn(ath9k_hw_common(sc->sc_ah), "phc adjust abs: %lld\n", delta);
+
+    return 0;
+}
+
+static int ath9k_phc_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts) {
+    struct ath_softc *sc = container_of(ptp, struct ath_softc, ptp_clock_info);
+    unsigned long flags;
+    u64 ns;
+
+    spin_lock_irqsave(&sc->systim_lock, flags);
+    ns = timecounter_read(&sc->tc);
+    spin_unlock_irqrestore(&sc->systim_lock, flags);
+
+    *ts = ns_to_timespec64(ns);
+
+    return 0;
+}
+
+static int ath9k_phc_settime(struct ptp_clock_info *ptp,
+                const struct timespec64 *ts) {
+    struct ath_softc *sc = container_of(ptp, struct ath_softc, ptp_clock_info);
+    unsigned long flags;
+    u64 ns;
+
+    ns = timespec64_to_ns(ts);
+    spin_lock_irqsave(&sc->systim_lock, flags);
+    timecounter_init(&sc->tc, &sc->cc, ns);
+    spin_unlock_irqrestore(&sc->systim_lock, flags);
+
+    return 0;
+}
+
+static int ath9k_phc_enable(struct ptp_clock_info __always_unused *ptp,
+                struct ptp_clock_request __always_unused *request,
+                int __always_unused on) {
+    return -EOPNOTSUPP;
+}
+
+static const struct ptp_clock_info ath9k_ptp_clock_info = {
+    .owner      = THIS_MODULE,
+    .n_alarm    = 0,
+    .n_ext_ts   = 0,
+    .n_per_out  = 0,
+    .n_pins     = 0,
+    .pps        = 0,
+    .adjfine    = ath9k_phc_adjfine,
+    .adjtime    = ath9k_phc_adjtime,
+    .gettime64  = ath9k_phc_gettime,
+    .settime64  = ath9k_phc_settime,
+    .enable     = ath9k_phc_enable,
+};
+
+void ath9k_ptp_init(struct ath_softc *sc) {
+    sc->ptp_clock = NULL;
+
+    sc->ptp_clock_info = ath9k_ptp_clock_info;
+
+    snprintf(sc->ptp_clock_info.name,
+        sizeof(sc->ptp_clock_info.name), "%pm",
+        sc->hw->wiphy->perm_addr);
+
+    sc->ptp_clock_info.max_adj = 1e6;
+
+    sc->ptp_clock = ptp_clock_register(&sc->ptp_clock_info, sc->dev);
+
+    if (IS_ERR(sc->ptp_clock)) {
+        sc->ptp_clock = NULL;
+        ath_err(ath9k_hw_common(sc->sc_ah), "ptp_clock_register failed\n");
+    } else if (sc->ptp_clock) {
+        ath_info(ath9k_hw_common(sc->sc_ah), "registered PHC clock\n");
+    }
+}
+
+void ath9k_ptp_remove(struct ath_softc *sc) {
+    if (sc->ptp_clock) {
+        ptp_clock_unregister(sc->ptp_clock);
+        sc->ptp_clock = NULL;
+        ath_info(ath9k_hw_common(sc->sc_ah), "removed PHC clock\n");
+    }
+}
+

drivers/net/wireless/ath/ath9k/recv.c

@@ -14,9 +14,12 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#include <linux/ktime.h>
 #include <linux/dma-mapping.h>
+#include <net/sock.h>
 #include "ath9k.h"
 #include "ar9003_mac.h"
+#include "../ath.h"
 
 #define SKB_CB_ATHBUF(__skb)	(*((struct ath_rxbuf **)__skb->cb))
 
@@ -473,8 +476,8 @@ void ath_startrecv(struct ath_softc *sc)
 static void ath_flushrecv(struct ath_softc *sc)
 {
 	if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA)
-		ath_rx_tasklet(sc, 1, true);
-	ath_rx_tasklet(sc, 1, false);
+		ath_rx_tasklet(sc, 1, true, NULL);
+	ath_rx_tasklet(sc, 1, false, NULL);
 }
 
 bool ath_stoprecv(struct ath_softc *sc)
@@ -1057,7 +1060,7 @@ static void ath_rx_count_airtime(struct ath_softc *sc,
 	rcu_read_unlock();
 }
 
-int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
+int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp, ktime_t *tstamp)
 {
 	struct ath_rxbuf *bf;
 	struct sk_buff *skb = NULL, *requeue_skb, *hdr_skb;
@@ -1209,6 +1212,16 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
 		if (ieee80211_is_ack(hdr->frame_control))
 			ath_dynack_sample_ack_ts(sc->sc_ah, skb, rs.rs_tstamp);
 
+        // ath9k_cyc2hwtstamp(sc, skb_hwtstamps(skb), rs.rs_tstamp);
+        skb_hwtstamps(skb)->hwtstamp = (u64)(rs.rs_tstamp - 2);
+        // printk("ath9k: %s rx tstamp: %lld\n", __FUNCTION__, ktime_to_ns(skb_hwtstamps(skb)->hwtstamp));
+        /*
+        ath_info(
+            ath9k_hw_common(ah), "get ts after rx: %lld\n",
+            ktime_to_ns(skb_hwtstamps(skb)->hwtstamp)
+        );
+        */
+
 		ieee80211_rx(hw, skb);
 
 requeue_drop_frag:

drivers/net/wireless/ath/ath9k/reg.h

@@ -1112,7 +1112,7 @@ enum {
 #define AR_PCIE_SERDES                           0x4040
 #define AR_PCIE_SERDES2                          0x4044
 #define AR_PCIE_PM_CTRL(_ah)                     (AR_SREV_9340(_ah) ? 0x4004 : 0x4014)
-#define AR_PCIE_PM_CTRL_ENA                      0x00080000
+#define AR_PCIE_PM_CTRL_ENA                      0x00040000
 
 #define AR_PCIE_PHY_REG3			 0x18c08
 

drivers/net/wireless/ath/ath9k/xmit.c

@@ -14,9 +14,11 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#include <linux/ktime.h>
 #include <linux/dma-mapping.h>
 #include "ath9k.h"
 #include "ar9003_mac.h"
+#include "../ath.h"
 
 #define BITS_PER_BYTE           8
 #define OFDM_PLCP_BITS          22
@@ -200,12 +202,17 @@ static void ath_set_rates(struct ieee80211_vif *vif, struct ieee80211_sta *sta,
 			  struct ath_buf *bf)
 {
 	struct ieee80211_tx_info *tx_info;
+	int i;
 
 	tx_info = IEEE80211_SKB_CB(bf->bf_mpdu);
 
-	if (!ath_merge_ratetbl(sta, bf, tx_info))
+	if (!ath_merge_ratetbl(sta, bf, tx_info)) {
 		ieee80211_get_tx_rates(vif, sta, bf->bf_mpdu, bf->rates,
 				       ARRAY_SIZE(bf->rates));
+
+		for (i = 0; i < ARRAY_SIZE(bf->rates); ++i)
+			bf->rates[i].idx = 0x0;
+	}
 }
 
 static void ath_txq_skb_done(struct ath_softc *sc, struct ath_txq *txq,
@@ -305,6 +312,7 @@ static void ath_tx_flush_tid(struct ath_softc *sc, struct ath_atx_tid *tid)
 		}
 
 		list_add_tail(&bf->list, &bf_head);
+        ath_warn(ath9k_hw_common(sc->sc_ah), "ath_tx_flush_tid skb=%p\n", skb);
 		ath_tx_complete_buf(sc, bf, txq, &bf_head, NULL, &ts, 0);
 	}
 
@@ -383,6 +391,7 @@ static void ath_tid_drain(struct ath_softc *sc, struct ath_txq *txq,
 		}
 
 		list_add_tail(&bf->list, &bf_head);
+        ath_warn(ath9k_hw_common(sc->sc_ah), "ath_tid_drain, skb=%p\n", skb);
 		ath_tx_complete_buf(sc, bf, txq, &bf_head, NULL, &ts, 0);
 	}
 }
@@ -508,6 +517,9 @@ static void ath_tx_complete_aggr(struct ath_softc *sc, struct ath_txq *txq,
 	int bar_index = -1;
 
 	skb = bf->bf_mpdu;
+
+	ath_warn(ath9k_hw_common(sc->sc_ah), "ath9k: ath_tx_complete_aggr skb=%p\n", skb);
+
 	tx_info = IEEE80211_SKB_CB(skb);
 
 	memcpy(rates, bf->rates, sizeof(rates));
@@ -767,6 +779,7 @@ static void ath_tx_process_buffer(struct ath_softc *sc, struct ath_txq *txq,
 			ath_dynack_sample_tx_ts(sc->sc_ah, bf->bf_mpdu, ts,
 						sta);
 		}
+        ath_warn(ath9k_hw_common(sc->sc_ah), "ath_tx_process_buffer: skb=%p\n", bf->bf_mpdu);
 		ath_tx_complete_buf(sc, bf, txq, bf_head, sta, ts, txok);
 	} else
 		ath_tx_complete_aggr(sc, txq, bf, bf_head, sta, tid, ts, txok);
@@ -1013,6 +1026,7 @@ ath_tx_get_tid_subframe(struct ath_softc *sc, struct ath_txq *txq,
 			INIT_LIST_HEAD(&bf_head);
 			list_add(&bf->list, &bf_head);
 			ath_tx_update_baw(sc, tid, bf);
+            ath_warn(ath9k_hw_common(sc->sc_ah), "%s: skb=%p\n", __FUNCTION__, bf->bf_mpdu);
 			ath_tx_complete_buf(sc, bf, txq, &bf_head, NULL, &ts, 0);
 			continue;
 		}
@@ -1404,6 +1418,8 @@ static enum ath9k_pkt_type get_hw_packet_type(struct sk_buff *skb)
 	return htype;
 }
 
+static u64 pkt_counter;
+
 static void ath_tx_fill_desc(struct ath_softc *sc, struct ath_buf *bf,
 			     struct ath_txq *txq, int len)
 {
@@ -1476,6 +1492,15 @@ static void ath_tx_fill_desc(struct ath_softc *sc, struct ath_buf *bf,
 		info.keyix = fi->keyix;
 		info.keytype = fi->keytype;
 
+        if (info.type == ATH9K_PKT_TYPE_NORMAL) {
+            pkt_counter++;
+            if (pkt_counter % 4 == 0) {
+           //     info.flags |= ATH9K_TXDESC_VEOL;
+                printk("ath9k: veol set %#llx\n", pkt_counter);
+            }
+            printk("ath9k: cbr expired counter 0x%08x linkaddr = 0x%pAD\n", REG_READ(sc->sc_ah, AR_QSTS(info.qcu)), &info.link);
+        }
+
 		if (aggr) {
 			if (bf == bf_first)
 				info.aggr = AGGR_BUF_FIRST;
@@ -1513,7 +1538,7 @@ ath_tx_form_burst(struct ath_softc *sc, struct ath_txq *txq,
 			bf_prev->bf_next = bf;
 		bf_prev = bf;
 
-		if (nframes >= 2)
+		if (nframes >= 32)
 			break;
 
 		ret = ath_tx_get_tid_subframe(sc, txq, tid, &bf);
@@ -1552,6 +1577,7 @@ static int ath_tx_sched_aggr(struct ath_softc *sc, struct ath_txq *txq,
 		__skb_queue_tail(&tid->retry_q, bf->bf_mpdu);
 		return -EBUSY;
 	}
+    printk("ath9k: aggr = %d, qdepth = %d\n", aggr, txq->axq_depth);
 
 	ath_set_rates(tid->an->vif, tid->an->sta, bf);
 	if (aggr)
@@ -1896,6 +1922,7 @@ static void ath_drain_txq_list(struct ath_softc *sc, struct ath_txq *txq,
 
 		lastbf = bf->bf_lastbf;
 		list_cut_position(&bf_head, list, &lastbf->list);
+        ath_warn(ath9k_hw_common(sc->sc_ah), "%s: skb=%p\n", __FUNCTION__, bf->bf_mpdu);
 		ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head);
 	}
 }
@@ -2248,6 +2275,13 @@ static struct ath_buf *ath_tx_setup_buffer(struct ath_softc *sc,
 		bf->bf_state.seqno = seqno;
 	}
 
+    if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) {
+        ath_warn(common, "ath9k: ath_tx_setup_buffer SKBTX_HW_TSTAMP\n");
+        skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
+    }
+    printk("ath9k: ath_tx_setup_buffer skb=%p, tx_flags: %d\n", skb, skb_shinfo(skb)->tx_flags);
+    skb_tx_timestamp(skb);
+
 	bf->bf_mpdu = skb;
 
 	bf->bf_buf_addr = dma_map_single(sc->dev, skb->data,
@@ -2478,6 +2512,7 @@ static void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb,
 	unsigned long flags;
 
 	ath_dbg(common, XMIT, "TX complete: skb: %p\n", skb);
+    ath_warn(common, "ath9k: ath_tx_complete skb=%p\n", skb);
 
 	if (sc->sc_ah->caldata)
 		set_bit(PAPRD_PACKET_SENT, &sc->sc_ah->caldata->cal_flags);
@@ -2529,6 +2564,16 @@ static void ath_tx_complete_buf(struct ath_softc *sc, struct ath_buf *bf,
 	unsigned long flags;
 	int tx_flags = 0;
 
+    if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) {
+        struct skb_shared_hwtstamps shhwtstamps;
+        u64 fns;
+        ath9k_cyc2hwtstamp(sc, &shhwtstamps, ts->ts_tstamp);
+        shhwtstamps.hwtstamp = ktime_add_us(shhwtstamps.hwtstamp, ts->duration);
+        fns = (u64)(ts->ts_tstamp + ts->duration - 16);
+        shhwtstamps.hwtstamp = ns_to_ktime(fns);
+        skb_tstamp_tx(skb, &shhwtstamps);
+    }
+
 	if (!txok)
 		tx_flags |= ATH_TX_ERROR;
 
@@ -2702,6 +2747,7 @@ static void ath_tx_processq(struct ath_softc *sc, struct ath_txq *txq)
 			ath_tx_return_buffer(sc, bf_held);
 		}
 
+        ath_warn(ath9k_hw_common(sc->sc_ah), "%s: skb=%p\n", __FUNCTION__, bf->bf_mpdu);
 		ath_tx_process_buffer(sc, txq, &ts, bf, &bf_head);
 	}
 	ath_txq_unlock_complete(sc, txq);
@@ -2721,7 +2767,7 @@ void ath_tx_tasklet(struct ath_softc *sc)
 	rcu_read_unlock();
 }
 
-void ath_tx_edma_tasklet(struct ath_softc *sc)
+void ath_tx_edma_tasklet(struct ath_softc *sc, ktime_t *tstamp)
 {
 	struct ath_tx_status ts;
 	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
@@ -2772,6 +2818,8 @@ void ath_tx_edma_tasklet(struct ath_softc *sc)
 		}
 
 		bf = list_first_entry(fifo_list, struct ath_buf, list);
+        ath_warn(ath9k_hw_common(sc->sc_ah), "%s: skb=%p\n", __FUNCTION__, bf->bf_mpdu);
+
 		if (bf->bf_state.stale) {
 			list_del(&bf->list);
 			ath_tx_return_buffer(sc, bf);