diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-03-25 03:53:42 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-03-25 03:53:42 -0300 |
commit | 03dd4cb26d967f9588437b0fc9cc0e8353322bb7 (patch) | |
tree | fa581f6dc1c0596391690d1f67eceef3af8246dc /drivers/net/wireless/p54/txrx.c | |
parent | d4e493caf788ef44982e131ff9c786546904d934 (diff) |
Linux-libre 4.5-gnu
Diffstat (limited to 'drivers/net/wireless/p54/txrx.c')
-rw-r--r-- | drivers/net/wireless/p54/txrx.c | 940 |
1 files changed, 0 insertions, 940 deletions
diff --git a/drivers/net/wireless/p54/txrx.c b/drivers/net/wireless/p54/txrx.c deleted file mode 100644 index 24e5ff9a9..000000000 --- a/drivers/net/wireless/p54/txrx.c +++ /dev/null @@ -1,940 +0,0 @@ -/* - * Common code for mac80211 Prism54 drivers - * - * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net> - * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de> - * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> - * - * Based on: - * - the islsm (softmac prism54) driver, which is: - * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al. - * - stlc45xx driver - * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/export.h> -#include <linux/firmware.h> -#include <linux/etherdevice.h> -#include <asm/div64.h> - -#include <net/mac80211.h> - -#include "p54.h" -#include "lmac.h" - -#ifdef P54_MM_DEBUG -static void p54_dump_tx_queue(struct p54_common *priv) -{ - unsigned long flags; - struct ieee80211_tx_info *info; - struct p54_tx_info *range; - struct sk_buff *skb; - struct p54_hdr *hdr; - unsigned int i = 0; - u32 prev_addr; - u32 largest_hole = 0, free; - - spin_lock_irqsave(&priv->tx_queue.lock, flags); - wiphy_debug(priv->hw->wiphy, "/ --- tx queue dump (%d entries) ---\n", - skb_queue_len(&priv->tx_queue)); - - prev_addr = priv->rx_start; - skb_queue_walk(&priv->tx_queue, skb) { - info = IEEE80211_SKB_CB(skb); - range = (void *) info->rate_driver_data; - hdr = (void *) skb->data; - - free = range->start_addr - prev_addr; - wiphy_debug(priv->hw->wiphy, - "| [%02d] => [skb:%p skb_len:0x%04x " - "hdr:{flags:%02x len:%04x req_id:%04x type:%02x} " - "mem:{start:%04x end:%04x, free:%d}]\n", - i++, skb, skb->len, - le16_to_cpu(hdr->flags), le16_to_cpu(hdr->len), - le32_to_cpu(hdr->req_id), le16_to_cpu(hdr->type), - range->start_addr, range->end_addr, free); - - prev_addr = range->end_addr; - largest_hole = max(largest_hole, free); - } - free = priv->rx_end - prev_addr; - largest_hole = max(largest_hole, free); - wiphy_debug(priv->hw->wiphy, - "\\ --- [free: %d], largest free block: %d ---\n", - free, largest_hole); - spin_unlock_irqrestore(&priv->tx_queue.lock, flags); -} -#endif /* P54_MM_DEBUG */ - -/* - * So, the firmware is somewhat stupid and doesn't know what places in its - * memory incoming data should go to. By poking around in the firmware, we - * can find some unused memory to upload our packets to. However, data that we - * want the card to TX needs to stay intact until the card has told us that - * it is done with it. This function finds empty places we can upload to and - * marks allocated areas as reserved if necessary. p54_find_and_unlink_skb or - * p54_free_skb frees allocated areas. - */ -static int p54_assign_address(struct p54_common *priv, struct sk_buff *skb) -{ - struct sk_buff *entry, *target_skb = NULL; - struct ieee80211_tx_info *info; - struct p54_tx_info *range; - struct p54_hdr *data = (void *) skb->data; - unsigned long flags; - u32 last_addr = priv->rx_start; - u32 target_addr = priv->rx_start; - u16 len = priv->headroom + skb->len + priv->tailroom + 3; - - info = IEEE80211_SKB_CB(skb); - range = (void *) info->rate_driver_data; - len = (range->extra_len + len) & ~0x3; - - spin_lock_irqsave(&priv->tx_queue.lock, flags); - if (unlikely(skb_queue_len(&priv->tx_queue) == 32)) { - /* - * The tx_queue is now really full. - * - * TODO: check if the device has crashed and reset it. - */ - spin_unlock_irqrestore(&priv->tx_queue.lock, flags); - return -EBUSY; - } - - skb_queue_walk(&priv->tx_queue, entry) { - u32 hole_size; - info = IEEE80211_SKB_CB(entry); - range = (void *) info->rate_driver_data; - hole_size = range->start_addr - last_addr; - - if (!target_skb && hole_size >= len) { - target_skb = entry->prev; - hole_size -= len; - target_addr = last_addr; - break; - } - last_addr = range->end_addr; - } - if (unlikely(!target_skb)) { - if (priv->rx_end - last_addr >= len) { - target_skb = priv->tx_queue.prev; - if (!skb_queue_empty(&priv->tx_queue)) { - info = IEEE80211_SKB_CB(target_skb); - range = (void *)info->rate_driver_data; - target_addr = range->end_addr; - } - } else { - spin_unlock_irqrestore(&priv->tx_queue.lock, flags); - return -ENOSPC; - } - } - - info = IEEE80211_SKB_CB(skb); - range = (void *) info->rate_driver_data; - range->start_addr = target_addr; - range->end_addr = target_addr + len; - data->req_id = cpu_to_le32(target_addr + priv->headroom); - if (IS_DATA_FRAME(skb) && - unlikely(GET_HW_QUEUE(skb) == P54_QUEUE_BEACON)) - priv->beacon_req_id = data->req_id; - - __skb_queue_after(&priv->tx_queue, target_skb, skb); - spin_unlock_irqrestore(&priv->tx_queue.lock, flags); - return 0; -} - -static void p54_tx_pending(struct p54_common *priv) -{ - struct sk_buff *skb; - int ret; - - skb = skb_dequeue(&priv->tx_pending); - if (unlikely(!skb)) - return ; - - ret = p54_assign_address(priv, skb); - if (unlikely(ret)) - skb_queue_head(&priv->tx_pending, skb); - else - priv->tx(priv->hw, skb); -} - -static void p54_wake_queues(struct p54_common *priv) -{ - unsigned long flags; - unsigned int i; - - if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) - return ; - - p54_tx_pending(priv); - - spin_lock_irqsave(&priv->tx_stats_lock, flags); - for (i = 0; i < priv->hw->queues; i++) { - if (priv->tx_stats[i + P54_QUEUE_DATA].len < - priv->tx_stats[i + P54_QUEUE_DATA].limit) - ieee80211_wake_queue(priv->hw, i); - } - spin_unlock_irqrestore(&priv->tx_stats_lock, flags); -} - -static int p54_tx_qos_accounting_alloc(struct p54_common *priv, - struct sk_buff *skb, - const u16 p54_queue) -{ - struct p54_tx_queue_stats *queue; - unsigned long flags; - - if (WARN_ON(p54_queue >= P54_QUEUE_NUM)) - return -EINVAL; - - queue = &priv->tx_stats[p54_queue]; - - spin_lock_irqsave(&priv->tx_stats_lock, flags); - if (unlikely(queue->len >= queue->limit && IS_QOS_QUEUE(p54_queue))) { - spin_unlock_irqrestore(&priv->tx_stats_lock, flags); - return -ENOSPC; - } - - queue->len++; - queue->count++; - - if (unlikely(queue->len == queue->limit && IS_QOS_QUEUE(p54_queue))) { - u16 ac_queue = p54_queue - P54_QUEUE_DATA; - ieee80211_stop_queue(priv->hw, ac_queue); - } - - spin_unlock_irqrestore(&priv->tx_stats_lock, flags); - return 0; -} - -static void p54_tx_qos_accounting_free(struct p54_common *priv, - struct sk_buff *skb) -{ - if (IS_DATA_FRAME(skb)) { - unsigned long flags; - - spin_lock_irqsave(&priv->tx_stats_lock, flags); - priv->tx_stats[GET_HW_QUEUE(skb)].len--; - spin_unlock_irqrestore(&priv->tx_stats_lock, flags); - - if (unlikely(GET_HW_QUEUE(skb) == P54_QUEUE_BEACON)) { - if (priv->beacon_req_id == GET_REQ_ID(skb)) { - /* this is the active beacon set anymore */ - priv->beacon_req_id = 0; - } - complete(&priv->beacon_comp); - } - } - p54_wake_queues(priv); -} - -void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb) -{ - struct p54_common *priv = dev->priv; - if (unlikely(!skb)) - return ; - - skb_unlink(skb, &priv->tx_queue); - p54_tx_qos_accounting_free(priv, skb); - ieee80211_free_txskb(dev, skb); -} -EXPORT_SYMBOL_GPL(p54_free_skb); - -static struct sk_buff *p54_find_and_unlink_skb(struct p54_common *priv, - const __le32 req_id) -{ - struct sk_buff *entry; - unsigned long flags; - - spin_lock_irqsave(&priv->tx_queue.lock, flags); - skb_queue_walk(&priv->tx_queue, entry) { - struct p54_hdr *hdr = (struct p54_hdr *) entry->data; - - if (hdr->req_id == req_id) { - __skb_unlink(entry, &priv->tx_queue); - spin_unlock_irqrestore(&priv->tx_queue.lock, flags); - p54_tx_qos_accounting_free(priv, entry); - return entry; - } - } - spin_unlock_irqrestore(&priv->tx_queue.lock, flags); - return NULL; -} - -void p54_tx(struct p54_common *priv, struct sk_buff *skb) -{ - skb_queue_tail(&priv->tx_pending, skb); - p54_tx_pending(priv); -} - -static int p54_rssi_to_dbm(struct p54_common *priv, int rssi) -{ - if (priv->rxhw != 5) { - return ((rssi * priv->cur_rssi->mul) / 64 + - priv->cur_rssi->add) / 4; - } else { - /* - * TODO: find the correct formula - */ - return rssi / 2 - 110; - } -} - -/* - * Even if the firmware is capable of dealing with incoming traffic, - * while dozing, we have to prepared in case mac80211 uses PS-POLL - * to retrieve outstanding frames from our AP. - * (see comment in net/mac80211/mlme.c @ line 1993) - */ -static void p54_pspoll_workaround(struct p54_common *priv, struct sk_buff *skb) -{ - struct ieee80211_hdr *hdr = (void *) skb->data; - struct ieee80211_tim_ie *tim_ie; - u8 *tim; - u8 tim_len; - bool new_psm; - - /* only beacons have a TIM IE */ - if (!ieee80211_is_beacon(hdr->frame_control)) - return; - - if (!priv->aid) - return; - - /* only consider beacons from the associated BSSID */ - if (!ether_addr_equal_64bits(hdr->addr3, priv->bssid)) - return; - - tim = p54_find_ie(skb, WLAN_EID_TIM); - if (!tim) - return; - - tim_len = tim[1]; - tim_ie = (struct ieee80211_tim_ie *) &tim[2]; - - new_psm = ieee80211_check_tim(tim_ie, tim_len, priv->aid); - if (new_psm != priv->powersave_override) { - priv->powersave_override = new_psm; - p54_set_ps(priv); - } -} - -static int p54_rx_data(struct p54_common *priv, struct sk_buff *skb) -{ - struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data; - struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); - u16 freq = le16_to_cpu(hdr->freq); - size_t header_len = sizeof(*hdr); - u32 tsf32; - u8 rate = hdr->rate & 0xf; - - /* - * If the device is in a unspecified state we have to - * ignore all data frames. Else we could end up with a - * nasty crash. - */ - if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) - return 0; - - if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD))) - return 0; - - if (hdr->decrypt_status == P54_DECRYPT_OK) - rx_status->flag |= RX_FLAG_DECRYPTED; - if ((hdr->decrypt_status == P54_DECRYPT_FAIL_MICHAEL) || - (hdr->decrypt_status == P54_DECRYPT_FAIL_TKIP)) - rx_status->flag |= RX_FLAG_MMIC_ERROR; - - rx_status->signal = p54_rssi_to_dbm(priv, hdr->rssi); - if (hdr->rate & 0x10) - rx_status->flag |= RX_FLAG_SHORTPRE; - if (priv->hw->conf.chandef.chan->band == IEEE80211_BAND_5GHZ) - rx_status->rate_idx = (rate < 4) ? 0 : rate - 4; - else - rx_status->rate_idx = rate; - - rx_status->freq = freq; - rx_status->band = priv->hw->conf.chandef.chan->band; - rx_status->antenna = hdr->antenna; - - tsf32 = le32_to_cpu(hdr->tsf32); - if (tsf32 < priv->tsf_low32) - priv->tsf_high32++; - rx_status->mactime = ((u64)priv->tsf_high32) << 32 | tsf32; - priv->tsf_low32 = tsf32; - - /* LMAC API Page 10/29 - s_lm_data_in - clock - * "usec accurate timestamp of hardware clock - * at end of frame (before OFDM SIFS EOF padding" - */ - rx_status->flag |= RX_FLAG_MACTIME_END; - - if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN)) - header_len += hdr->align[0]; - - skb_pull(skb, header_len); - skb_trim(skb, le16_to_cpu(hdr->len)); - if (unlikely(priv->hw->conf.flags & IEEE80211_CONF_PS)) - p54_pspoll_workaround(priv, skb); - - ieee80211_rx_irqsafe(priv->hw, skb); - - ieee80211_queue_delayed_work(priv->hw, &priv->work, - msecs_to_jiffies(P54_STATISTICS_UPDATE)); - - return -1; -} - -static void p54_rx_frame_sent(struct p54_common *priv, struct sk_buff *skb) -{ - struct p54_hdr *hdr = (struct p54_hdr *) skb->data; - struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data; - struct ieee80211_tx_info *info; - struct p54_hdr *entry_hdr; - struct p54_tx_data *entry_data; - struct sk_buff *entry; - unsigned int pad = 0, frame_len; - int count, idx; - - entry = p54_find_and_unlink_skb(priv, hdr->req_id); - if (unlikely(!entry)) - return ; - - frame_len = entry->len; - info = IEEE80211_SKB_CB(entry); - entry_hdr = (struct p54_hdr *) entry->data; - entry_data = (struct p54_tx_data *) entry_hdr->data; - priv->stats.dot11ACKFailureCount += payload->tries - 1; - - /* - * Frames in P54_QUEUE_FWSCAN and P54_QUEUE_BEACON are - * generated by the driver. Therefore tx_status is bogus - * and we don't want to confuse the mac80211 stack. - */ - if (unlikely(entry_data->hw_queue < P54_QUEUE_FWSCAN)) { - dev_kfree_skb_any(entry); - return ; - } - - /* - * Clear manually, ieee80211_tx_info_clear_status would - * clear the counts too and we need them. - */ - memset(&info->status.ack_signal, 0, - sizeof(struct ieee80211_tx_info) - - offsetof(struct ieee80211_tx_info, status.ack_signal)); - BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, - status.ack_signal) != 20); - - if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN)) - pad = entry_data->align[0]; - - /* walk through the rates array and adjust the counts */ - count = payload->tries; - for (idx = 0; idx < 4; idx++) { - if (count >= info->status.rates[idx].count) { - count -= info->status.rates[idx].count; - } else if (count > 0) { - info->status.rates[idx].count = count; - count = 0; - } else { - info->status.rates[idx].idx = -1; - info->status.rates[idx].count = 0; - } - } - - if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && - !(payload->status & P54_TX_FAILED)) - info->flags |= IEEE80211_TX_STAT_ACK; - if (payload->status & P54_TX_PSM_CANCELLED) - info->flags |= IEEE80211_TX_STAT_TX_FILTERED; - info->status.ack_signal = p54_rssi_to_dbm(priv, - (int)payload->ack_rssi); - - /* Undo all changes to the frame. */ - switch (entry_data->key_type) { - case P54_CRYPTO_TKIPMICHAEL: { - u8 *iv = (u8 *)(entry_data->align + pad + - entry_data->crypt_offset); - - /* Restore the original TKIP IV. */ - iv[2] = iv[0]; - iv[0] = iv[1]; - iv[1] = (iv[0] | 0x20) & 0x7f; /* WEPSeed - 8.3.2.2 */ - - frame_len -= 12; /* remove TKIP_MMIC + TKIP_ICV */ - break; - } - case P54_CRYPTO_AESCCMP: - frame_len -= 8; /* remove CCMP_MIC */ - break; - case P54_CRYPTO_WEP: - frame_len -= 4; /* remove WEP_ICV */ - break; - } - - skb_trim(entry, frame_len); - skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data)); - ieee80211_tx_status_irqsafe(priv->hw, entry); -} - -static void p54_rx_eeprom_readback(struct p54_common *priv, - struct sk_buff *skb) -{ - struct p54_hdr *hdr = (struct p54_hdr *) skb->data; - struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data; - struct sk_buff *tmp; - - if (!priv->eeprom) - return ; - - if (priv->fw_var >= 0x509) { - memcpy(priv->eeprom, eeprom->v2.data, - le16_to_cpu(eeprom->v2.len)); - } else { - memcpy(priv->eeprom, eeprom->v1.data, - le16_to_cpu(eeprom->v1.len)); - } - - priv->eeprom = NULL; - tmp = p54_find_and_unlink_skb(priv, hdr->req_id); - dev_kfree_skb_any(tmp); - complete(&priv->eeprom_comp); -} - -static void p54_rx_stats(struct p54_common *priv, struct sk_buff *skb) -{ - struct p54_hdr *hdr = (struct p54_hdr *) skb->data; - struct p54_statistics *stats = (struct p54_statistics *) hdr->data; - struct sk_buff *tmp; - struct ieee80211_channel *chan; - unsigned int i, rssi, tx, cca, dtime, dtotal, dcca, dtx, drssi, unit; - u32 tsf32; - - if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED)) - return ; - - tsf32 = le32_to_cpu(stats->tsf32); - if (tsf32 < priv->tsf_low32) - priv->tsf_high32++; - priv->tsf_low32 = tsf32; - - priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail); - priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success); - priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs); - - priv->noise = p54_rssi_to_dbm(priv, le32_to_cpu(stats->noise)); - - /* - * STSW450X LMAC API page 26 - 3.8 Statistics - * "The exact measurement period can be derived from the - * timestamp member". - */ - dtime = tsf32 - priv->survey_raw.timestamp; - - /* - * STSW450X LMAC API page 26 - 3.8.1 Noise histogram - * The LMAC samples RSSI, CCA and transmit state at regular - * periods (typically 8 times per 1k [as in 1024] usec). - */ - cca = le32_to_cpu(stats->sample_cca); - tx = le32_to_cpu(stats->sample_tx); - rssi = 0; - for (i = 0; i < ARRAY_SIZE(stats->sample_noise); i++) - rssi += le32_to_cpu(stats->sample_noise[i]); - - dcca = cca - priv->survey_raw.cached_cca; - drssi = rssi - priv->survey_raw.cached_rssi; - dtx = tx - priv->survey_raw.cached_tx; - dtotal = dcca + drssi + dtx; - - /* - * update statistics when more than a second is over since the - * last call, or when a update is badly needed. - */ - if (dtotal && (priv->update_stats || dtime >= USEC_PER_SEC) && - dtime >= dtotal) { - priv->survey_raw.timestamp = tsf32; - priv->update_stats = false; - unit = dtime / dtotal; - - if (dcca) { - priv->survey_raw.cca += dcca * unit; - priv->survey_raw.cached_cca = cca; - } - if (dtx) { - priv->survey_raw.tx += dtx * unit; - priv->survey_raw.cached_tx = tx; - } - if (drssi) { - priv->survey_raw.rssi += drssi * unit; - priv->survey_raw.cached_rssi = rssi; - } - - /* 1024 usec / 8 times = 128 usec / time */ - if (!(priv->phy_ps || priv->phy_idle)) - priv->survey_raw.active += dtotal * unit; - else - priv->survey_raw.active += (dcca + dtx) * unit; - } - - chan = priv->curchan; - if (chan) { - struct survey_info *survey = &priv->survey[chan->hw_value]; - survey->noise = clamp(priv->noise, -128, 127); - survey->time = priv->survey_raw.active; - survey->time_tx = priv->survey_raw.tx; - survey->time_busy = priv->survey_raw.tx + - priv->survey_raw.cca; - do_div(survey->time, 1024); - do_div(survey->time_tx, 1024); - do_div(survey->time_busy, 1024); - } - - tmp = p54_find_and_unlink_skb(priv, hdr->req_id); - dev_kfree_skb_any(tmp); - complete(&priv->stat_comp); -} - -static void p54_rx_trap(struct p54_common *priv, struct sk_buff *skb) -{ - struct p54_hdr *hdr = (struct p54_hdr *) skb->data; - struct p54_trap *trap = (struct p54_trap *) hdr->data; - u16 event = le16_to_cpu(trap->event); - u16 freq = le16_to_cpu(trap->frequency); - - switch (event) { - case P54_TRAP_BEACON_TX: - break; - case P54_TRAP_RADAR: - wiphy_info(priv->hw->wiphy, "radar (freq:%d MHz)\n", freq); - break; - case P54_TRAP_NO_BEACON: - if (priv->vif) - ieee80211_beacon_loss(priv->vif); - break; - case P54_TRAP_SCAN: - break; - case P54_TRAP_TBTT: - break; - case P54_TRAP_TIMER: - break; - case P54_TRAP_FAA_RADIO_OFF: - wiphy_rfkill_set_hw_state(priv->hw->wiphy, true); - break; - case P54_TRAP_FAA_RADIO_ON: - wiphy_rfkill_set_hw_state(priv->hw->wiphy, false); - break; - default: - wiphy_info(priv->hw->wiphy, "received event:%x freq:%d\n", - event, freq); - break; - } -} - -static int p54_rx_control(struct p54_common *priv, struct sk_buff *skb) -{ - struct p54_hdr *hdr = (struct p54_hdr *) skb->data; - - switch (le16_to_cpu(hdr->type)) { - case P54_CONTROL_TYPE_TXDONE: - p54_rx_frame_sent(priv, skb); - break; - case P54_CONTROL_TYPE_TRAP: - p54_rx_trap(priv, skb); - break; - case P54_CONTROL_TYPE_BBP: - break; - case P54_CONTROL_TYPE_STAT_READBACK: - p54_rx_stats(priv, skb); - break; - case P54_CONTROL_TYPE_EEPROM_READBACK: - p54_rx_eeprom_readback(priv, skb); - break; - default: - wiphy_debug(priv->hw->wiphy, - "not handling 0x%02x type control frame\n", - le16_to_cpu(hdr->type)); - break; - } - return 0; -} - -/* returns zero if skb can be reused */ -int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb) -{ - struct p54_common *priv = dev->priv; - u16 type = le16_to_cpu(*((__le16 *)skb->data)); - - if (type & P54_HDR_FLAG_CONTROL) - return p54_rx_control(priv, skb); - else - return p54_rx_data(priv, skb); -} -EXPORT_SYMBOL_GPL(p54_rx); - -static void p54_tx_80211_header(struct p54_common *priv, struct sk_buff *skb, - struct ieee80211_tx_info *info, - struct ieee80211_sta *sta, - u8 *queue, u32 *extra_len, u16 *flags, u16 *aid, - bool *burst_possible) -{ - struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; - - if (ieee80211_is_data_qos(hdr->frame_control)) - *burst_possible = true; - else - *burst_possible = false; - - if (!(info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)) - *flags |= P54_HDR_FLAG_DATA_OUT_SEQNR; - - if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) - *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL; - - if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT) - *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL; - - *queue = skb_get_queue_mapping(skb) + P54_QUEUE_DATA; - - switch (priv->mode) { - case NL80211_IFTYPE_MONITOR: - /* - * We have to set P54_HDR_FLAG_DATA_OUT_PROMISC for - * every frame in promiscuous/monitor mode. - * see STSW45x0C LMAC API - page 12. - */ - *aid = 0; - *flags |= P54_HDR_FLAG_DATA_OUT_PROMISC; - break; - case NL80211_IFTYPE_STATION: - *aid = 1; - break; - case NL80211_IFTYPE_AP: - case NL80211_IFTYPE_ADHOC: - case NL80211_IFTYPE_MESH_POINT: - if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) { - *aid = 0; - *queue = P54_QUEUE_CAB; - return; - } - - if (unlikely(ieee80211_is_mgmt(hdr->frame_control))) { - if (ieee80211_is_probe_resp(hdr->frame_control)) { - *aid = 0; - *flags |= P54_HDR_FLAG_DATA_OUT_TIMESTAMP | - P54_HDR_FLAG_DATA_OUT_NOCANCEL; - return; - } else if (ieee80211_is_beacon(hdr->frame_control)) { - *aid = 0; - - if (info->flags & IEEE80211_TX_CTL_INJECTED) { - /* - * Injecting beacons on top of a AP is - * not a good idea... nevertheless, - * it should be doable. - */ - - return; - } - - *flags |= P54_HDR_FLAG_DATA_OUT_TIMESTAMP; - *queue = P54_QUEUE_BEACON; - *extra_len = IEEE80211_MAX_TIM_LEN; - return; - } - } - - if (sta) - *aid = sta->aid; - break; - } -} - -static u8 p54_convert_algo(u32 cipher) -{ - switch (cipher) { - case WLAN_CIPHER_SUITE_WEP40: - case WLAN_CIPHER_SUITE_WEP104: - return P54_CRYPTO_WEP; - case WLAN_CIPHER_SUITE_TKIP: - return P54_CRYPTO_TKIPMICHAEL; - case WLAN_CIPHER_SUITE_CCMP: - return P54_CRYPTO_AESCCMP; - default: - return 0; - } -} - -void p54_tx_80211(struct ieee80211_hw *dev, - struct ieee80211_tx_control *control, - struct sk_buff *skb) -{ - struct p54_common *priv = dev->priv; - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - struct p54_tx_info *p54info; - struct p54_hdr *hdr; - struct p54_tx_data *txhdr; - unsigned int padding, len, extra_len = 0; - int i, j, ridx; - u16 hdr_flags = 0, aid = 0; - u8 rate, queue = 0, crypt_offset = 0; - u8 cts_rate = 0x20; - u8 rc_flags; - u8 calculated_tries[4]; - u8 nrates = 0, nremaining = 8; - bool burst_allowed = false; - - p54_tx_80211_header(priv, skb, info, control->sta, &queue, &extra_len, - &hdr_flags, &aid, &burst_allowed); - - if (p54_tx_qos_accounting_alloc(priv, skb, queue)) { - ieee80211_free_txskb(dev, skb); - return; - } - - padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3; - len = skb->len; - - if (info->control.hw_key) { - crypt_offset = ieee80211_get_hdrlen_from_skb(skb); - if (info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { - u8 *iv = (u8 *)(skb->data + crypt_offset); - /* - * The firmware excepts that the IV has to have - * this special format - */ - iv[1] = iv[0]; - iv[0] = iv[2]; - iv[2] = 0; - } - } - - txhdr = (struct p54_tx_data *) skb_push(skb, sizeof(*txhdr) + padding); - hdr = (struct p54_hdr *) skb_push(skb, sizeof(*hdr)); - - if (padding) - hdr_flags |= P54_HDR_FLAG_DATA_ALIGN; - hdr->type = cpu_to_le16(aid); - hdr->rts_tries = info->control.rates[0].count; - - /* - * we register the rates in perfect order, and - * RTS/CTS won't happen on 5 GHz - */ - cts_rate = info->control.rts_cts_rate_idx; - - memset(&txhdr->rateset, 0, sizeof(txhdr->rateset)); - - /* see how many rates got used */ - for (i = 0; i < dev->max_rates; i++) { - if (info->control.rates[i].idx < 0) - break; - nrates++; - } - - /* limit tries to 8/nrates per rate */ - for (i = 0; i < nrates; i++) { - /* - * The magic expression here is equivalent to 8/nrates for - * all values that matter, but avoids division and jumps. - * Note that nrates can only take the values 1 through 4. - */ - calculated_tries[i] = min_t(int, ((15 >> nrates) | 1) + 1, - info->control.rates[i].count); - nremaining -= calculated_tries[i]; - } - - /* if there are tries left, distribute from back to front */ - for (i = nrates - 1; nremaining > 0 && i >= 0; i--) { - int tmp = info->control.rates[i].count - calculated_tries[i]; - - if (tmp <= 0) - continue; - /* RC requested more tries at this rate */ - - tmp = min_t(int, tmp, nremaining); - calculated_tries[i] += tmp; - nremaining -= tmp; - } - - ridx = 0; - for (i = 0; i < nrates && ridx < 8; i++) { - /* we register the rates in perfect order */ - rate = info->control.rates[i].idx; - if (info->band == IEEE80211_BAND_5GHZ) - rate += 4; - - /* store the count we actually calculated for TX status */ - info->control.rates[i].count = calculated_tries[i]; - - rc_flags = info->control.rates[i].flags; - if (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) { - rate |= 0x10; - cts_rate |= 0x10; - } - if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) { - burst_allowed = false; - rate |= 0x40; - } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { - rate |= 0x20; - burst_allowed = false; - } - for (j = 0; j < calculated_tries[i] && ridx < 8; j++) { - txhdr->rateset[ridx] = rate; - ridx++; - } - } - - if (burst_allowed) - hdr_flags |= P54_HDR_FLAG_DATA_OUT_BURST; - - /* TODO: enable bursting */ - hdr->flags = cpu_to_le16(hdr_flags); - hdr->tries = ridx; - txhdr->rts_rate_idx = 0; - if (info->control.hw_key) { - txhdr->key_type = p54_convert_algo(info->control.hw_key->cipher); - txhdr->key_len = min((u8)16, info->control.hw_key->keylen); - memcpy(txhdr->key, info->control.hw_key->key, txhdr->key_len); - if (info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) { - /* reserve space for the MIC key */ - len += 8; - memcpy(skb_put(skb, 8), &(info->control.hw_key->key - [NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY]), 8); - } - /* reserve some space for ICV */ - len += info->control.hw_key->icv_len; - memset(skb_put(skb, info->control.hw_key->icv_len), 0, - info->control.hw_key->icv_len); - } else { - txhdr->key_type = 0; - txhdr->key_len = 0; - } - txhdr->crypt_offset = crypt_offset; - txhdr->hw_queue = queue; - txhdr->backlog = priv->tx_stats[queue].len - 1; - memset(txhdr->durations, 0, sizeof(txhdr->durations)); - txhdr->tx_antenna = 2 & priv->tx_diversity_mask; - if (priv->rxhw == 5) { - txhdr->longbow.cts_rate = cts_rate; - txhdr->longbow.output_power = cpu_to_le16(priv->output_power); - } else { - txhdr->normal.output_power = priv->output_power; - txhdr->normal.cts_rate = cts_rate; - } - if (padding) - txhdr->align[0] = padding; - - hdr->len = cpu_to_le16(len); - /* modifies skb->cb and with it info, so must be last! */ - p54info = (void *) info->rate_driver_data; - p54info->extra_len = extra_len; - - p54_tx(priv, skb); -} |