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946 lines
25 KiB
946 lines
25 KiB
// 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 <[email protected]> |
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* Copyright (c) 2007-2009, Christian Lamparter <[email protected]> |
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* Copyright 2008, Johannes Berg <[email protected]> |
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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 <[email protected]>, 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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|
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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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|
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#include <net/mac80211.h> |
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|
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#include "p54.h" |
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#include "lmac.h" |
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|
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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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|
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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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|
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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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|
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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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|
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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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/* |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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/* |
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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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|
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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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|
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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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/* |
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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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|
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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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|
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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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|
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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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|
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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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|
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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 |
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* at end of frame (before OFDM SIFS EOF padding" |
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*/ |
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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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|
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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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|
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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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|
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ieee80211_rx_irqsafe(priv->hw, skb); |
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|
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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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|
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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); |
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if (unlikely(!entry)) |
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return ; |
|
|
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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; |
|
|
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/* |
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* Frames in P54_QUEUE_FWSCAN and P54_QUEUE_BEACON are |
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* generated by the driver. Therefore tx_status is bogus |
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* and we don't want to confuse the mac80211 stack. |
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*/ |
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if (unlikely(entry_data->hw_queue < P54_QUEUE_FWSCAN)) { |
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dev_kfree_skb_any(entry); |
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return ; |
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} |
|
|
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/* |
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* Clear manually, ieee80211_tx_info_clear_status would |
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* clear the counts too and we need them. |
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*/ |
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memset(&info->status.ack_signal, 0, |
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sizeof(struct ieee80211_tx_info) - |
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offsetof(struct ieee80211_tx_info, status.ack_signal)); |
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BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, |
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status.ack_signal) != 20); |
|
|
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if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN)) |
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pad = entry_data->align[0]; |
|
|
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/* walk through the rates array and adjust the counts */ |
|
count = payload->tries; |
|
for (idx = 0; idx < 4; idx++) { |
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if (count >= info->status.rates[idx].count) { |
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count -= info->status.rates[idx].count; |
|
} else if (count > 0) { |
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info->status.rates[idx].count = count; |
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count = 0; |
|
} else { |
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info->status.rates[idx].idx = -1; |
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info->status.rates[idx].count = 0; |
|
} |
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} |
|
|
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if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && |
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!(payload->status & P54_TX_FAILED)) |
|
info->flags |= IEEE80211_TX_STAT_ACK; |
|
if (payload->status & P54_TX_PSM_CANCELLED) |
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info->flags |= IEEE80211_TX_STAT_TX_FILTERED; |
|
info->status.ack_signal = p54_rssi_to_dbm(priv, |
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(int)payload->ack_rssi); |
|
|
|
/* Undo all changes to the frame. */ |
|
switch (entry_data->key_type) { |
|
case P54_CRYPTO_TKIPMICHAEL: { |
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u8 *iv = (u8 *)(entry_data->align + pad + |
|
entry_data->crypt_offset); |
|
|
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/* Restore the original TKIP IV. */ |
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iv[2] = iv[0]; |
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iv[0] = iv[1]; |
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iv[1] = (iv[0] | 0x20) & 0x7f; /* WEPSeed - 8.3.2.2 */ |
|
|
|
frame_len -= 12; /* remove TKIP_MMIC + TKIP_ICV */ |
|
break; |
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} |
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case P54_CRYPTO_AESCCMP: |
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frame_len -= 8; /* remove CCMP_MIC */ |
|
break; |
|
case P54_CRYPTO_WEP: |
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frame_len -= 4; /* remove WEP_ICV */ |
|
break; |
|
} |
|
|
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skb_trim(entry, frame_len); |
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skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data)); |
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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); |
|
}
|
|
|