From 2c452297ff3eaafad41d24fa03d54a169ced8de1 Mon Sep 17 00:00:00 2001 From: Emmanuel Grumbach Date: Thu, 25 Aug 2011 23:11:21 -0700 Subject: [PATCH] iwlagn: upper layer stores iwl_rxon_context in skb's CB This removes the need for iwl_tx_info. Each tx queue holds an array of skbs, the transport layer doesn't need to know anything about the context in which a specific skb is sent. Signed-off-by: Emmanuel Grumbach Signed-off-by: Wey-Yi Guy Signed-off-by: John W. Linville --- drivers/net/wireless/iwlwifi/iwl-agn-tx.c | 4 +++- drivers/net/wireless/iwlwifi/iwl-dev.h | 12 +++--------- drivers/net/wireless/iwlwifi/iwl-trans-tx-pcie.c | 19 ++++++------------- drivers/net/wireless/iwlwifi/iwl-trans.c | 23 ++++++++++------------- drivers/net/wireless/iwlwifi/iwl-trans.h | 8 +++----- 5 files changed, 25 insertions(+), 41 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c index 8edb3f89..60ba4f8 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn-tx.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-tx.c @@ -454,7 +454,9 @@ int iwlagn_tx_skb(struct iwl_priv *priv, struct sk_buff *skb) iwl_update_stats(priv, true, fc, len); - if (iwl_trans_tx(trans(priv), skb, tx_cmd, txq_id, fc, is_agg, ctx)) + info->driver_data[0] = ctx; + + if (iwl_trans_tx(trans(priv), skb, tx_cmd, txq_id, fc, is_agg)) goto drop_unlock_sta; if (ieee80211_is_data_qos(fc)) { diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h index 4133404..aa56736 100644 --- a/drivers/net/wireless/iwlwifi/iwl-dev.h +++ b/drivers/net/wireless/iwlwifi/iwl-dev.h @@ -146,12 +146,6 @@ struct iwl_queue { * space less than this */ }; -/* One for each TFD */ -struct iwl_tx_info { - struct sk_buff *skb; - struct iwl_rxon_context *ctx; -}; - /** * struct iwl_tx_queue - Tx Queue for DMA * @q: generic Rx/Tx queue descriptor @@ -177,7 +171,7 @@ struct iwl_tx_queue { struct iwl_tfd *tfds; struct iwl_device_cmd **cmd; struct iwl_cmd_meta *meta; - struct iwl_tx_info *txb; + struct sk_buff **skbs; unsigned long time_stamp; u8 need_update; u8 sched_retry; @@ -1373,9 +1367,9 @@ extern struct iwl_mod_params iwlagn_mod_params; static inline struct ieee80211_hdr *iwl_tx_queue_get_hdr(struct iwl_priv *priv, int txq_id, int idx) { - if (priv->txq[txq_id].txb[idx].skb) + if (priv->txq[txq_id].skbs[idx]) return (struct ieee80211_hdr *)priv->txq[txq_id]. - txb[idx].skb->data; + skbs[idx]->data; return NULL; } diff --git a/drivers/net/wireless/iwlwifi/iwl-trans-tx-pcie.c b/drivers/net/wireless/iwlwifi/iwl-trans-tx-pcie.c index 8c18a75..cc518af 100644 --- a/drivers/net/wireless/iwlwifi/iwl-trans-tx-pcie.c +++ b/drivers/net/wireless/iwlwifi/iwl-trans-tx-pcie.c @@ -215,15 +215,15 @@ void iwlagn_txq_free_tfd(struct iwl_trans *trans, struct iwl_tx_queue *txq, DMA_TO_DEVICE); /* free SKB */ - if (txq->txb) { + if (txq->skbs) { struct sk_buff *skb; - skb = txq->txb[index].skb; + skb = txq->skbs[index]; /* can be called from irqs-disabled context */ if (skb) { dev_kfree_skb_any(skb); - txq->txb[index].skb = NULL; + txq->skbs[index] = NULL; } } } @@ -1056,8 +1056,6 @@ void iwl_tx_queue_reclaim(struct iwl_trans *trans, int txq_id, int index, { struct iwl_tx_queue *txq = &priv(trans)->txq[txq_id]; struct iwl_queue *q = &txq->q; - struct iwl_tx_info *tx_info; - struct ieee80211_tx_info *info; int last_to_free; /*Since we free until index _not_ inclusive, the one before index is @@ -1083,17 +1081,12 @@ void iwl_tx_queue_reclaim(struct iwl_trans *trans, int txq_id, int index, q->read_ptr != index; q->read_ptr = iwl_queue_inc_wrap(q->read_ptr, q->n_bd)) { - tx_info = &txq->txb[txq->q.read_ptr]; - - if (WARN_ON_ONCE(tx_info->skb == NULL)) + if (WARN_ON_ONCE(txq->skbs[txq->q.read_ptr] == NULL)) continue; - info = IEEE80211_SKB_CB(tx_info->skb); - info->driver_data[0] = tx_info->ctx; - - __skb_queue_tail(skbs, tx_info->skb); + __skb_queue_tail(skbs, txq->skbs[txq->q.read_ptr]); - tx_info->skb = NULL; + txq->skbs[txq->q.read_ptr] = NULL; iwlagn_txq_inval_byte_cnt_tbl(trans, txq); diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.c b/drivers/net/wireless/iwlwifi/iwl-trans.c index 0a3dd6b..e545898 100644 --- a/drivers/net/wireless/iwlwifi/iwl-trans.c +++ b/drivers/net/wireless/iwlwifi/iwl-trans.c @@ -304,7 +304,7 @@ static int iwl_trans_txq_alloc(struct iwl_trans *trans, size_t tfd_sz = sizeof(struct iwl_tfd) * TFD_QUEUE_SIZE_MAX; int i; - if (WARN_ON(txq->meta || txq->cmd || txq->txb || txq->tfds)) + if (WARN_ON(txq->meta || txq->cmd || txq->skbs || txq->tfds)) return -EINVAL; txq->q.n_window = slots_num; @@ -328,15 +328,15 @@ static int iwl_trans_txq_alloc(struct iwl_trans *trans, /* Driver private data, only for Tx (not command) queues, * not shared with device. */ if (txq_id != trans->shrd->cmd_queue) { - txq->txb = kzalloc(sizeof(txq->txb[0]) * + txq->skbs = kzalloc(sizeof(txq->skbs[0]) * TFD_QUEUE_SIZE_MAX, GFP_KERNEL); - if (!txq->txb) { + if (!txq->skbs) { IWL_ERR(trans, "kmalloc for auxiliary BD " "structures failed\n"); goto error; } } else { - txq->txb = NULL; + txq->skbs = NULL; } /* Circular buffer of transmit frame descriptors (TFDs), @@ -351,8 +351,8 @@ static int iwl_trans_txq_alloc(struct iwl_trans *trans, return 0; error: - kfree(txq->txb); - txq->txb = NULL; + kfree(txq->skbs); + txq->skbs = NULL; /* since txq->cmd has been zeroed, * all non allocated cmd[i] will be NULL */ if (txq->cmd) @@ -453,8 +453,8 @@ static void iwl_tx_queue_free(struct iwl_trans *trans, int txq_id) } /* De-alloc array of per-TFD driver data */ - kfree(txq->txb); - txq->txb = NULL; + kfree(txq->skbs); + txq->skbs = NULL; /* deallocate arrays */ kfree(txq->cmd); @@ -1035,8 +1035,7 @@ static struct iwl_tx_cmd *iwl_trans_pcie_get_tx_cmd(struct iwl_trans *trans, } static int iwl_trans_pcie_tx(struct iwl_priv *priv, struct sk_buff *skb, - struct iwl_tx_cmd *tx_cmd, int txq_id, __le16 fc, bool ampdu, - struct iwl_rxon_context *ctx) + struct iwl_tx_cmd *tx_cmd, int txq_id, __le16 fc, bool ampdu) { struct iwl_tx_queue *txq = &priv->txq[txq_id]; struct iwl_queue *q = &txq->q; @@ -1051,9 +1050,7 @@ static int iwl_trans_pcie_tx(struct iwl_priv *priv, struct sk_buff *skb, u8 hdr_len = ieee80211_hdrlen(fc); /* Set up driver data for this TFD */ - memset(&(txq->txb[q->write_ptr]), 0, sizeof(struct iwl_tx_info)); - txq->txb[q->write_ptr].skb = skb; - txq->txb[q->write_ptr].ctx = ctx; + txq->skbs[q->write_ptr] = skb; /* Set up first empty entry in queue's array of Tx/cmd buffers */ out_meta = &txq->meta[q->write_ptr]; diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h index e72e480..2385de2 100644 --- a/drivers/net/wireless/iwlwifi/iwl-trans.h +++ b/drivers/net/wireless/iwlwifi/iwl-trans.h @@ -119,8 +119,7 @@ struct iwl_trans_ops { const void *data); struct iwl_tx_cmd * (*get_tx_cmd)(struct iwl_trans *trans, int txq_id); int (*tx)(struct iwl_priv *priv, struct sk_buff *skb, - struct iwl_tx_cmd *tx_cmd, int txq_id, __le16 fc, bool ampdu, - struct iwl_rxon_context *ctx); + struct iwl_tx_cmd *tx_cmd, int txq_id, __le16 fc, bool ampdu); void (*reclaim)(struct iwl_trans *trans, int txq_id, int ssn, u32 status, struct sk_buff_head *skbs); @@ -198,10 +197,9 @@ static inline struct iwl_tx_cmd *iwl_trans_get_tx_cmd(struct iwl_trans *trans, } static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb, - struct iwl_tx_cmd *tx_cmd, int txq_id, __le16 fc, bool ampdu, - struct iwl_rxon_context *ctx) + struct iwl_tx_cmd *tx_cmd, int txq_id, __le16 fc, bool ampdu) { - return trans->ops->tx(priv(trans), skb, tx_cmd, txq_id, fc, ampdu, ctx); + return trans->ops->tx(priv(trans), skb, tx_cmd, txq_id, fc, ampdu); } static inline void iwl_trans_reclaim(struct iwl_trans *trans, int txq_id, -- 2.7.4