diff options
Diffstat (limited to 'drivers/net/wireless/mac80211_hwsim.c')
| -rw-r--r-- | drivers/net/wireless/mac80211_hwsim.c | 177 |
1 files changed, 130 insertions, 47 deletions
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c index ff9085502bea..b73e497fe770 100644 --- a/drivers/net/wireless/mac80211_hwsim.c +++ b/drivers/net/wireless/mac80211_hwsim.c @@ -48,6 +48,10 @@ static int channels = 1; module_param(channels, int, 0444); MODULE_PARM_DESC(channels, "Number of concurrent channels"); +static bool paged_rx = false; +module_param(paged_rx, bool, 0644); +MODULE_PARM_DESC(paged_rx, "Use paged SKBs for RX instead of linear ones"); + /** * enum hwsim_regtest - the type of regulatory tests we offer * @@ -333,11 +337,11 @@ struct mac80211_hwsim_data { int scan_chan_idx; struct ieee80211_channel *channel; - unsigned long beacon_int; /* in jiffies unit */ + u64 beacon_int /* beacon interval in us */; unsigned int rx_filter; bool started, idle, scanning; struct mutex mutex; - struct timer_list beacon_timer; + struct tasklet_hrtimer beacon_timer; enum ps_mode { PS_DISABLED, PS_ENABLED, PS_AUTO_POLL, PS_MANUAL_POLL } ps; @@ -357,7 +361,10 @@ struct mac80211_hwsim_data { int power_level; /* difference between this hw's clock and the real clock, in usecs */ - u64 tsf_offset; + s64 tsf_offset; + s64 bcn_delta; + /* absolute beacon transmission time. Used to cover up "tx" delay. */ + u64 abs_bcn_ts; }; @@ -405,15 +412,19 @@ static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb, return NETDEV_TX_OK; } +static inline u64 mac80211_hwsim_get_tsf_raw(void) +{ + return ktime_to_us(ktime_get_real()); +} + static __le64 __mac80211_hwsim_get_tsf(struct mac80211_hwsim_data *data) { - struct timeval tv = ktime_to_timeval(ktime_get_real()); - u64 now = tv.tv_sec * USEC_PER_SEC + tv.tv_usec; + u64 now = mac80211_hwsim_get_tsf_raw(); return cpu_to_le64(now + data->tsf_offset); } static u64 mac80211_hwsim_get_tsf(struct ieee80211_hw *hw, - struct ieee80211_vif *vif) + struct ieee80211_vif *vif) { struct mac80211_hwsim_data *data = hw->priv; return le64_to_cpu(__mac80211_hwsim_get_tsf(data)); @@ -423,9 +434,13 @@ static void mac80211_hwsim_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif, u64 tsf) { struct mac80211_hwsim_data *data = hw->priv; - struct timeval tv = ktime_to_timeval(ktime_get_real()); - u64 now = tv.tv_sec * USEC_PER_SEC + tv.tv_usec; - data->tsf_offset = tsf - now; + u64 now = mac80211_hwsim_get_tsf(hw, vif); + u32 bcn_int = data->beacon_int; + s64 delta = tsf - now; + + data->tsf_offset += delta; + /* adjust after beaconing with new timestamp at old TBTT */ + data->bcn_delta = do_div(delta, bcn_int); } static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw, @@ -696,7 +711,7 @@ static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw, struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct ieee80211_rx_status rx_status; - struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info); + u64 now; memset(&rx_status, 0, sizeof(rx_status)); rx_status.flag |= RX_FLAG_MACTIME_START; @@ -722,11 +737,23 @@ static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw, secpath_reset(skb); nf_reset(skb); + /* + * Get absolute mactime here so all HWs RX at the "same time", and + * absolute TX time for beacon mactime so the timestamp matches. + * Giving beacons a different mactime than non-beacons looks messy, but + * it helps the Toffset be exact and a ~10us mactime discrepancy + * probably doesn't really matter. + */ + if (ieee80211_is_beacon(hdr->frame_control) || + ieee80211_is_probe_resp(hdr->frame_control)) + now = data->abs_bcn_ts; + else + now = mac80211_hwsim_get_tsf_raw(); + /* Copy skb to all enabled radios that are on the current frequency */ spin_lock(&hwsim_radio_lock); list_for_each_entry(data2, &hwsim_radios, list) { struct sk_buff *nskb; - struct ieee80211_mgmt *mgmt; struct tx_iter_data tx_iter_data = { .receive = false, .channel = chan, @@ -755,24 +782,30 @@ static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw, * reserve some space for our vendor and the normal * radiotap header, since we're copying anyway */ - nskb = skb_copy_expand(skb, 64, 0, GFP_ATOMIC); - if (nskb == NULL) - continue; + if (skb->len < PAGE_SIZE && paged_rx) { + struct page *page = alloc_page(GFP_ATOMIC); + + if (!page) + continue; + + nskb = dev_alloc_skb(128); + if (!nskb) { + __free_page(page); + continue; + } + + memcpy(page_address(page), skb->data, skb->len); + skb_add_rx_frag(nskb, 0, page, 0, skb->len, skb->len); + } else { + nskb = skb_copy(skb, GFP_ATOMIC); + if (!nskb) + continue; + } if (mac80211_hwsim_addr_match(data2, hdr->addr1)) ack = true; - /* set bcn timestamp relative to receiver mactime */ - rx_status.mactime = - le64_to_cpu(__mac80211_hwsim_get_tsf(data2)); - mgmt = (struct ieee80211_mgmt *) nskb->data; - if (ieee80211_is_beacon(mgmt->frame_control) || - ieee80211_is_probe_resp(mgmt->frame_control)) - mgmt->u.beacon.timestamp = cpu_to_le64( - rx_status.mactime + - (data->tsf_offset - data2->tsf_offset) + - 24 * 8 * 10 / txrate->bitrate); - + rx_status.mactime = now + data2->tsf_offset; #if 0 /* * Don't enable this code by default as the OUI 00:00:00 @@ -896,7 +929,7 @@ static void mac80211_hwsim_stop(struct ieee80211_hw *hw) { struct mac80211_hwsim_data *data = hw->priv; data->started = false; - del_timer(&data->beacon_timer); + tasklet_hrtimer_cancel(&data->beacon_timer); wiphy_debug(hw->wiphy, "%s\n", __func__); } @@ -962,7 +995,11 @@ static void mac80211_hwsim_tx_frame(struct ieee80211_hw *hw, static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac, struct ieee80211_vif *vif) { - struct ieee80211_hw *hw = arg; + struct mac80211_hwsim_data *data = arg; + struct ieee80211_hw *hw = data->hw; + struct ieee80211_tx_info *info; + struct ieee80211_rate *txrate; + struct ieee80211_mgmt *mgmt; struct sk_buff *skb; hwsim_check_magic(vif); @@ -975,26 +1012,48 @@ static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac, skb = ieee80211_beacon_get(hw, vif); if (skb == NULL) return; + info = IEEE80211_SKB_CB(skb); + txrate = ieee80211_get_tx_rate(hw, info); + + mgmt = (struct ieee80211_mgmt *) skb->data; + /* fake header transmission time */ + data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw(); + mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts + + data->tsf_offset + + 24 * 8 * 10 / txrate->bitrate); mac80211_hwsim_tx_frame(hw, skb, rcu_dereference(vif->chanctx_conf)->def.chan); } - -static void mac80211_hwsim_beacon(unsigned long arg) +static enum hrtimer_restart +mac80211_hwsim_beacon(struct hrtimer *timer) { - struct ieee80211_hw *hw = (struct ieee80211_hw *) arg; - struct mac80211_hwsim_data *data = hw->priv; + struct mac80211_hwsim_data *data = + container_of(timer, struct mac80211_hwsim_data, + beacon_timer.timer); + struct ieee80211_hw *hw = data->hw; + u64 bcn_int = data->beacon_int; + ktime_t next_bcn; if (!data->started) - return; + goto out; ieee80211_iterate_active_interfaces_atomic( hw, IEEE80211_IFACE_ITER_NORMAL, - mac80211_hwsim_beacon_tx, hw); + mac80211_hwsim_beacon_tx, data); + + /* beacon at new TBTT + beacon interval */ + if (data->bcn_delta) { + bcn_int -= data->bcn_delta; + data->bcn_delta = 0; + } - data->beacon_timer.expires = jiffies + data->beacon_int; - add_timer(&data->beacon_timer); + next_bcn = ktime_add(hrtimer_get_expires(timer), + ns_to_ktime(bcn_int * 1000)); + tasklet_hrtimer_start(&data->beacon_timer, next_bcn, HRTIMER_MODE_ABS); +out: + return HRTIMER_NORESTART; } static const char *hwsim_chantypes[] = { @@ -1032,9 +1091,16 @@ static int mac80211_hwsim_config(struct ieee80211_hw *hw, u32 changed) data->power_level = conf->power_level; if (!data->started || !data->beacon_int) - del_timer(&data->beacon_timer); - else - mod_timer(&data->beacon_timer, jiffies + data->beacon_int); + tasklet_hrtimer_cancel(&data->beacon_timer); + else if (!hrtimer_is_queued(&data->beacon_timer.timer)) { + u64 tsf = mac80211_hwsim_get_tsf(hw, NULL); + u32 bcn_int = data->beacon_int; + u64 until_tbtt = bcn_int - do_div(tsf, bcn_int); + + tasklet_hrtimer_start(&data->beacon_timer, + ns_to_ktime(until_tbtt * 1000), + HRTIMER_MODE_REL); + } return 0; } @@ -1084,12 +1150,26 @@ static void mac80211_hwsim_bss_info_changed(struct ieee80211_hw *hw, if (changed & BSS_CHANGED_BEACON_INT) { wiphy_debug(hw->wiphy, " BCNINT: %d\n", info->beacon_int); - data->beacon_int = 1024 * info->beacon_int / 1000 * HZ / 1000; - if (WARN_ON(!data->beacon_int)) - data->beacon_int = 1; - if (data->started) - mod_timer(&data->beacon_timer, - jiffies + data->beacon_int); + data->beacon_int = info->beacon_int * 1024; + } + + if (changed & BSS_CHANGED_BEACON_ENABLED) { + wiphy_debug(hw->wiphy, " BCN EN: %d\n", info->enable_beacon); + if (data->started && + !hrtimer_is_queued(&data->beacon_timer.timer) && + info->enable_beacon) { + u64 tsf, until_tbtt; + u32 bcn_int; + if (WARN_ON(!data->beacon_int)) + data->beacon_int = 1000 * 1024; + tsf = mac80211_hwsim_get_tsf(hw, vif); + bcn_int = data->beacon_int; + until_tbtt = bcn_int - do_div(tsf, bcn_int); + tasklet_hrtimer_start(&data->beacon_timer, + ns_to_ktime(until_tbtt * 1000), + HRTIMER_MODE_REL); + } else if (!info->enable_beacon) + tasklet_hrtimer_cancel(&data->beacon_timer); } if (changed & BSS_CHANGED_ERP_CTS_PROT) { @@ -1292,7 +1372,9 @@ static int mac80211_hwsim_ampdu_action(struct ieee80211_hw *hw, case IEEE80211_AMPDU_TX_START: ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); break; - case IEEE80211_AMPDU_TX_STOP: + case IEEE80211_AMPDU_TX_STOP_CONT: + case IEEE80211_AMPDU_TX_STOP_FLUSH: + case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); break; case IEEE80211_AMPDU_TX_OPERATIONAL: @@ -2370,8 +2452,9 @@ static int __init init_mac80211_hwsim(void) data->debugfs, data, &hwsim_fops_group); - setup_timer(&data->beacon_timer, mac80211_hwsim_beacon, - (unsigned long) hw); + tasklet_hrtimer_init(&data->beacon_timer, + mac80211_hwsim_beacon, + CLOCK_REALTIME, HRTIMER_MODE_ABS); list_add_tail(&data->list, &hwsim_radios); } |