// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Common code for mac80211 Prism54 drivers
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*
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* Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
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* Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
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* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
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*
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* Based on:
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* - the islsm (softmac prism54) driver, which is:
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* Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
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* - stlc45xx driver
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* Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
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*/
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#include <linux/export.h>
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#include <linux/firmware.h>
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#include <linux/etherdevice.h>
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#include <asm/div64.h>
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#include <net/mac80211.h>
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#include "p54.h"
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#include "lmac.h"
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#ifdef P54_MM_DEBUG
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static void p54_dump_tx_queue(struct p54_common *priv)
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{
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unsigned long flags;
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struct ieee80211_tx_info *info;
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struct p54_tx_info *range;
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struct sk_buff *skb;
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struct p54_hdr *hdr;
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unsigned int i = 0;
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u32 prev_addr;
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u32 largest_hole = 0, free;
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spin_lock_irqsave(&priv->tx_queue.lock, flags);
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wiphy_debug(priv->hw->wiphy, "/ --- tx queue dump (%d entries) ---\n",
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skb_queue_len(&priv->tx_queue));
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prev_addr = priv->rx_start;
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skb_queue_walk(&priv->tx_queue, skb) {
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info = IEEE80211_SKB_CB(skb);
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range = (void *) info->rate_driver_data;
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hdr = (void *) skb->data;
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free = range->start_addr - prev_addr;
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wiphy_debug(priv->hw->wiphy,
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"| [%02d] => [skb:%p skb_len:0x%04x "
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"hdr:{flags:%02x len:%04x req_id:%04x type:%02x} "
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"mem:{start:%04x end:%04x, free:%d}]\n",
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i++, skb, skb->len,
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le16_to_cpu(hdr->flags), le16_to_cpu(hdr->len),
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le32_to_cpu(hdr->req_id), le16_to_cpu(hdr->type),
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range->start_addr, range->end_addr, free);
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prev_addr = range->end_addr;
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largest_hole = max(largest_hole, free);
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}
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free = priv->rx_end - prev_addr;
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largest_hole = max(largest_hole, free);
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wiphy_debug(priv->hw->wiphy,
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"\\ --- [free: %d], largest free block: %d ---\n",
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free, largest_hole);
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spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
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}
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#endif /* P54_MM_DEBUG */
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/*
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* So, the firmware is somewhat stupid and doesn't know what places in its
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* memory incoming data should go to. By poking around in the firmware, we
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* can find some unused memory to upload our packets to. However, data that we
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* want the card to TX needs to stay intact until the card has told us that
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* it is done with it. This function finds empty places we can upload to and
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* marks allocated areas as reserved if necessary. p54_find_and_unlink_skb or
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* p54_free_skb frees allocated areas.
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*/
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static int p54_assign_address(struct p54_common *priv, struct sk_buff *skb)
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{
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struct sk_buff *entry, *target_skb = NULL;
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struct ieee80211_tx_info *info;
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struct p54_tx_info *range;
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struct p54_hdr *data = (void *) skb->data;
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unsigned long flags;
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u32 last_addr = priv->rx_start;
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u32 target_addr = priv->rx_start;
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u16 len = priv->headroom + skb->len + priv->tailroom + 3;
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info = IEEE80211_SKB_CB(skb);
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range = (void *) info->rate_driver_data;
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len = (range->extra_len + len) & ~0x3;
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spin_lock_irqsave(&priv->tx_queue.lock, flags);
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if (unlikely(skb_queue_len(&priv->tx_queue) == 32)) {
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/*
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* The tx_queue is now really full.
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*
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* TODO: check if the device has crashed and reset it.
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*/
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spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
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return -EBUSY;
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}
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skb_queue_walk(&priv->tx_queue, entry) {
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u32 hole_size;
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info = IEEE80211_SKB_CB(entry);
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range = (void *) info->rate_driver_data;
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hole_size = range->start_addr - last_addr;
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if (!target_skb && hole_size >= len) {
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target_skb = entry->prev;
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hole_size -= len;
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target_addr = last_addr;
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break;
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}
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last_addr = range->end_addr;
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}
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if (unlikely(!target_skb)) {
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if (priv->rx_end - last_addr >= len) {
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target_skb = skb_peek_tail(&priv->tx_queue);
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if (target_skb) {
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info = IEEE80211_SKB_CB(target_skb);
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range = (void *)info->rate_driver_data;
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target_addr = range->end_addr;
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}
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} else {
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spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
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return -ENOSPC;
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}
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}
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info = IEEE80211_SKB_CB(skb);
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range = (void *) info->rate_driver_data;
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range->start_addr = target_addr;
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range->end_addr = target_addr + len;
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data->req_id = cpu_to_le32(target_addr + priv->headroom);
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if (IS_DATA_FRAME(skb) &&
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unlikely(GET_HW_QUEUE(skb) == P54_QUEUE_BEACON))
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priv->beacon_req_id = data->req_id;
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if (target_skb)
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__skb_queue_after(&priv->tx_queue, target_skb, skb);
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else
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__skb_queue_head(&priv->tx_queue, skb);
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spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
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return 0;
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}
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static void p54_tx_pending(struct p54_common *priv)
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{
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struct sk_buff *skb;
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int ret;
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skb = skb_dequeue(&priv->tx_pending);
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if (unlikely(!skb))
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return ;
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ret = p54_assign_address(priv, skb);
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if (unlikely(ret))
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skb_queue_head(&priv->tx_pending, skb);
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else
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priv->tx(priv->hw, skb);
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}
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static void p54_wake_queues(struct p54_common *priv)
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{
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unsigned long flags;
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unsigned int i;
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if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
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return ;
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p54_tx_pending(priv);
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spin_lock_irqsave(&priv->tx_stats_lock, flags);
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for (i = 0; i < priv->hw->queues; i++) {
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if (priv->tx_stats[i + P54_QUEUE_DATA].len <
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priv->tx_stats[i + P54_QUEUE_DATA].limit)
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ieee80211_wake_queue(priv->hw, i);
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}
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spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
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}
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static int p54_tx_qos_accounting_alloc(struct p54_common *priv,
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struct sk_buff *skb,
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const u16 p54_queue)
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{
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struct p54_tx_queue_stats *queue;
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unsigned long flags;
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if (WARN_ON(p54_queue >= P54_QUEUE_NUM))
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return -EINVAL;
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queue = &priv->tx_stats[p54_queue];
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spin_lock_irqsave(&priv->tx_stats_lock, flags);
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if (unlikely(queue->len >= queue->limit && IS_QOS_QUEUE(p54_queue))) {
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spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
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return -ENOSPC;
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}
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queue->len++;
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queue->count++;
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if (unlikely(queue->len == queue->limit && IS_QOS_QUEUE(p54_queue))) {
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u16 ac_queue = p54_queue - P54_QUEUE_DATA;
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ieee80211_stop_queue(priv->hw, ac_queue);
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}
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spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
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return 0;
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}
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static void p54_tx_qos_accounting_free(struct p54_common *priv,
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struct sk_buff *skb)
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{
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if (IS_DATA_FRAME(skb)) {
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unsigned long flags;
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|
spin_lock_irqsave(&priv->tx_stats_lock, flags);
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priv->tx_stats[GET_HW_QUEUE(skb)].len--;
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spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
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if (unlikely(GET_HW_QUEUE(skb) == P54_QUEUE_BEACON)) {
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if (priv->beacon_req_id == GET_REQ_ID(skb)) {
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/* this is the active beacon set anymore */
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priv->beacon_req_id = 0;
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}
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complete(&priv->beacon_comp);
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}
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}
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p54_wake_queues(priv);
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}
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void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb)
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{
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struct p54_common *priv = dev->priv;
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if (unlikely(!skb))
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return ;
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skb_unlink(skb, &priv->tx_queue);
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p54_tx_qos_accounting_free(priv, skb);
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ieee80211_free_txskb(dev, skb);
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}
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EXPORT_SYMBOL_GPL(p54_free_skb);
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static struct sk_buff *p54_find_and_unlink_skb(struct p54_common *priv,
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const __le32 req_id)
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{
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struct sk_buff *entry;
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unsigned long flags;
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spin_lock_irqsave(&priv->tx_queue.lock, flags);
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skb_queue_walk(&priv->tx_queue, entry) {
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struct p54_hdr *hdr = (struct p54_hdr *) entry->data;
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if (hdr->req_id == req_id) {
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__skb_unlink(entry, &priv->tx_queue);
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spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
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p54_tx_qos_accounting_free(priv, entry);
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return entry;
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}
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}
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spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
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return NULL;
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}
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void p54_tx(struct p54_common *priv, struct sk_buff *skb)
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{
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skb_queue_tail(&priv->tx_pending, skb);
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p54_tx_pending(priv);
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}
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static int p54_rssi_to_dbm(struct p54_common *priv, int rssi)
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{
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if (priv->rxhw != 5) {
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return ((rssi * priv->cur_rssi->mul) / 64 +
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priv->cur_rssi->add) / 4;
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} else {
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/*
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* TODO: find the correct formula
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*/
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return rssi / 2 - 110;
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}
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}
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/*
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* Even if the firmware is capable of dealing with incoming traffic,
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* while dozing, we have to prepared in case mac80211 uses PS-POLL
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* to retrieve outstanding frames from our AP.
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* (see comment in net/mac80211/mlme.c @ line 1993)
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*/
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static void p54_pspoll_workaround(struct p54_common *priv, struct sk_buff *skb)
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{
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struct ieee80211_hdr *hdr = (void *) skb->data;
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struct ieee80211_tim_ie *tim_ie;
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u8 *tim;
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u8 tim_len;
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bool new_psm;
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/* only beacons have a TIM IE */
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if (!ieee80211_is_beacon(hdr->frame_control))
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return;
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if (!priv->aid)
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return;
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/* only consider beacons from the associated BSSID */
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if (!ether_addr_equal_64bits(hdr->addr3, priv->bssid))
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return;
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tim = p54_find_ie(skb, WLAN_EID_TIM);
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if (!tim)
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return;
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tim_len = tim[1];
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tim_ie = (struct ieee80211_tim_ie *) &tim[2];
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new_psm = ieee80211_check_tim(tim_ie, tim_len, priv->aid);
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if (new_psm != priv->powersave_override) {
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priv->powersave_override = new_psm;
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p54_set_ps(priv);
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}
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}
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static int p54_rx_data(struct p54_common *priv, struct sk_buff *skb)
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{
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struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data;
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struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
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u16 freq = le16_to_cpu(hdr->freq);
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size_t header_len = sizeof(*hdr);
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u32 tsf32;
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__le16 fc;
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u8 rate = hdr->rate & 0xf;
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/*
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* If the device is in a unspecified state we have to
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* ignore all data frames. Else we could end up with a
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* nasty crash.
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*/
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if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
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return 0;
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if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD)))
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return 0;
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if (hdr->decrypt_status == P54_DECRYPT_OK)
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rx_status->flag |= RX_FLAG_DECRYPTED;
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if ((hdr->decrypt_status == P54_DECRYPT_FAIL_MICHAEL) ||
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(hdr->decrypt_status == P54_DECRYPT_FAIL_TKIP))
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rx_status->flag |= RX_FLAG_MMIC_ERROR;
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rx_status->signal = p54_rssi_to_dbm(priv, hdr->rssi);
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if (hdr->rate & 0x10)
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rx_status->enc_flags |= RX_ENC_FLAG_SHORTPRE;
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if (priv->hw->conf.chandef.chan->band == NL80211_BAND_5GHZ)
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rx_status->rate_idx = (rate < 4) ? 0 : rate - 4;
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else
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rx_status->rate_idx = rate;
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rx_status->freq = freq;
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rx_status->band = priv->hw->conf.chandef.chan->band;
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rx_status->antenna = hdr->antenna;
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tsf32 = le32_to_cpu(hdr->tsf32);
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if (tsf32 < priv->tsf_low32)
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priv->tsf_high32++;
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rx_status->mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
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priv->tsf_low32 = tsf32;
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/* LMAC API Page 10/29 - s_lm_data_in - clock
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* "usec accurate timestamp of hardware clock
|
* at end of frame (before OFDM SIFS EOF padding"
|
*/
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rx_status->flag |= RX_FLAG_MACTIME_END;
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if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
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header_len += hdr->align[0];
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skb_pull(skb, header_len);
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skb_trim(skb, le16_to_cpu(hdr->len));
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fc = ((struct ieee80211_hdr *)skb->data)->frame_control;
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if (ieee80211_is_probe_resp(fc) || ieee80211_is_beacon(fc))
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rx_status->boottime_ns = ktime_get_boottime_ns();
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if (unlikely(priv->hw->conf.flags & IEEE80211_CONF_PS))
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p54_pspoll_workaround(priv, skb);
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ieee80211_rx_irqsafe(priv->hw, skb);
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ieee80211_queue_delayed_work(priv->hw, &priv->work,
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msecs_to_jiffies(P54_STATISTICS_UPDATE));
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|
return -1;
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}
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static void p54_rx_frame_sent(struct p54_common *priv, struct sk_buff *skb)
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{
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struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
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struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data;
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struct ieee80211_tx_info *info;
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struct p54_hdr *entry_hdr;
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struct p54_tx_data *entry_data;
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struct sk_buff *entry;
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unsigned int pad = 0, frame_len;
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int count, idx;
|
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entry = p54_find_and_unlink_skb(priv, hdr->req_id);
|
if (unlikely(!entry))
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return ;
|
|
frame_len = entry->len;
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info = IEEE80211_SKB_CB(entry);
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entry_hdr = (struct p54_hdr *) entry->data;
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entry_data = (struct p54_tx_data *) entry_hdr->data;
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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.
|
*/
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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 = skb_push(skb, sizeof(*txhdr) + padding);
|
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 == NL80211_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;
|
skb_put_data(skb,
|
&(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;
|
skb_put_zero(skb, 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);
|
}
|
