diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/wireless/ath/ath10k/htt.h | 18 | ||||
-rw-r--r-- | drivers/net/wireless/ath/ath10k/htt_rx.c | 58 | ||||
-rw-r--r-- | drivers/net/wireless/ath/ath10k/htt_tx.c | 14 | ||||
-rw-r--r-- | drivers/net/wireless/ath/ath10k/txrx.c | 12 |
4 files changed, 65 insertions, 37 deletions
diff --git a/drivers/net/wireless/ath/ath10k/htt.h b/drivers/net/wireless/ath/ath10k/htt.h index d196bcc..76c4bae 100644 --- a/drivers/net/wireless/ath/ath10k/htt.h +++ b/drivers/net/wireless/ath/ath10k/htt.h @@ -22,6 +22,7 @@ #include <linux/interrupt.h> #include <linux/dmapool.h> #include <linux/hashtable.h> +#include <linux/kfifo.h> #include <net/mac80211.h> #include "htc.h" @@ -1526,10 +1527,15 @@ struct htt_resp { /*** host side structures follow ***/ struct htt_tx_done { - u32 msdu_id; - bool discard; - bool no_ack; - bool success; + u16 msdu_id; + u16 status; +}; + +enum htt_tx_compl_state { + HTT_TX_COMPL_STATE_NONE, + HTT_TX_COMPL_STATE_ACK, + HTT_TX_COMPL_STATE_NOACK, + HTT_TX_COMPL_STATE_DISCARD, }; struct htt_peer_map_event { @@ -1650,6 +1656,9 @@ struct ath10k_htt { struct idr pending_tx; wait_queue_head_t empty_tx_wq; + /* FIFO for storing tx done status {ack, no-ack, discard} and msdu id */ + DECLARE_KFIFO_PTR(txdone_fifo, struct htt_tx_done); + /* set if host-fw communication goes haywire * used to avoid further failures */ bool rx_confused; @@ -1658,7 +1667,6 @@ struct ath10k_htt { /* This is used to group tx/rx completions separately and process them * in batches to reduce cache stalls */ struct tasklet_struct txrx_compl_task; - struct sk_buff_head tx_compl_q; struct sk_buff_head rx_compl_q; struct sk_buff_head rx_in_ord_compl_q; struct sk_buff_head tx_fetch_ind_q; diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c index 06975bf..ea73a23 100644 --- a/drivers/net/wireless/ath/ath10k/htt_rx.c +++ b/drivers/net/wireless/ath/ath10k/htt_rx.c @@ -226,7 +226,6 @@ void ath10k_htt_rx_free(struct ath10k_htt *htt) tasklet_kill(&htt->rx_replenish_task); tasklet_kill(&htt->txrx_compl_task); - skb_queue_purge(&htt->tx_compl_q); skb_queue_purge(&htt->rx_compl_q); skb_queue_purge(&htt->rx_in_ord_compl_q); skb_queue_purge(&htt->tx_fetch_ind_q); @@ -567,7 +566,6 @@ int ath10k_htt_rx_alloc(struct ath10k_htt *htt) tasklet_init(&htt->rx_replenish_task, ath10k_htt_rx_replenish_task, (unsigned long)htt); - skb_queue_head_init(&htt->tx_compl_q); skb_queue_head_init(&htt->rx_compl_q); skb_queue_head_init(&htt->rx_in_ord_compl_q); skb_queue_head_init(&htt->tx_fetch_ind_q); @@ -1678,7 +1676,7 @@ static void ath10k_htt_rx_frag_handler(struct ath10k_htt *htt, } } -static void ath10k_htt_rx_frm_tx_compl(struct ath10k *ar, +static void ath10k_htt_rx_tx_compl_ind(struct ath10k *ar, struct sk_buff *skb) { struct ath10k_htt *htt = &ar->htt; @@ -1690,19 +1688,19 @@ static void ath10k_htt_rx_frm_tx_compl(struct ath10k *ar, switch (status) { case HTT_DATA_TX_STATUS_NO_ACK: - tx_done.no_ack = true; + tx_done.status = HTT_TX_COMPL_STATE_NOACK; break; case HTT_DATA_TX_STATUS_OK: - tx_done.success = true; + tx_done.status = HTT_TX_COMPL_STATE_ACK; break; case HTT_DATA_TX_STATUS_DISCARD: case HTT_DATA_TX_STATUS_POSTPONE: case HTT_DATA_TX_STATUS_DOWNLOAD_FAIL: - tx_done.discard = true; + tx_done.status = HTT_TX_COMPL_STATE_DISCARD; break; default: ath10k_warn(ar, "unhandled tx completion status %d\n", status); - tx_done.discard = true; + tx_done.status = HTT_TX_COMPL_STATE_DISCARD; break; } @@ -1712,7 +1710,20 @@ static void ath10k_htt_rx_frm_tx_compl(struct ath10k *ar, for (i = 0; i < resp->data_tx_completion.num_msdus; i++) { msdu_id = resp->data_tx_completion.msdus[i]; tx_done.msdu_id = __le16_to_cpu(msdu_id); - ath10k_txrx_tx_unref(htt, &tx_done); + + /* kfifo_put: In practice firmware shouldn't fire off per-CE + * interrupt and main interrupt (MSI/-X range case) for the same + * HTC service so it should be safe to use kfifo_put w/o lock. + * + * From kfifo_put() documentation: + * Note that with only one concurrent reader and one concurrent + * writer, you don't need extra locking to use these macro. + */ + if (!kfifo_put(&htt->txdone_fifo, tx_done)) { + ath10k_warn(ar, "txdone fifo overrun, msdu_id %d status %d\n", + tx_done.msdu_id, tx_done.status); + ath10k_txrx_tx_unref(htt, &tx_done); + } } } @@ -2339,18 +2350,17 @@ void ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb) struct htt_tx_done tx_done = {}; int status = __le32_to_cpu(resp->mgmt_tx_completion.status); - tx_done.msdu_id = - __le32_to_cpu(resp->mgmt_tx_completion.desc_id); + tx_done.msdu_id = __le32_to_cpu(resp->mgmt_tx_completion.desc_id); switch (status) { case HTT_MGMT_TX_STATUS_OK: - tx_done.success = true; + tx_done.status = HTT_TX_COMPL_STATE_ACK; break; case HTT_MGMT_TX_STATUS_RETRY: - tx_done.no_ack = true; + tx_done.status = HTT_TX_COMPL_STATE_NOACK; break; case HTT_MGMT_TX_STATUS_DROP: - tx_done.discard = true; + tx_done.status = HTT_TX_COMPL_STATE_DISCARD; break; } @@ -2364,9 +2374,9 @@ void ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb) break; } case HTT_T2H_MSG_TYPE_TX_COMPL_IND: - skb_queue_tail(&htt->tx_compl_q, skb); + ath10k_htt_rx_tx_compl_ind(htt->ar, skb); tasklet_schedule(&htt->txrx_compl_task); - return; + break; case HTT_T2H_MSG_TYPE_SEC_IND: { struct ath10k *ar = htt->ar; struct htt_security_indication *ev = &resp->security_indication; @@ -2475,7 +2485,7 @@ static void ath10k_htt_txrx_compl_task(unsigned long ptr) { struct ath10k_htt *htt = (struct ath10k_htt *)ptr; struct ath10k *ar = htt->ar; - struct sk_buff_head tx_q; + struct htt_tx_done tx_done = {}; struct sk_buff_head rx_q; struct sk_buff_head rx_ind_q; struct sk_buff_head tx_ind_q; @@ -2483,15 +2493,10 @@ static void ath10k_htt_txrx_compl_task(unsigned long ptr) struct sk_buff *skb; unsigned long flags; - __skb_queue_head_init(&tx_q); __skb_queue_head_init(&rx_q); __skb_queue_head_init(&rx_ind_q); __skb_queue_head_init(&tx_ind_q); - spin_lock_irqsave(&htt->tx_compl_q.lock, flags); - skb_queue_splice_init(&htt->tx_compl_q, &tx_q); - spin_unlock_irqrestore(&htt->tx_compl_q.lock, flags); - spin_lock_irqsave(&htt->rx_compl_q.lock, flags); skb_queue_splice_init(&htt->rx_compl_q, &rx_q); spin_unlock_irqrestore(&htt->rx_compl_q.lock, flags); @@ -2504,10 +2509,13 @@ static void ath10k_htt_txrx_compl_task(unsigned long ptr) skb_queue_splice_init(&htt->tx_fetch_ind_q, &tx_ind_q); spin_unlock_irqrestore(&htt->tx_fetch_ind_q.lock, flags); - while ((skb = __skb_dequeue(&tx_q))) { - ath10k_htt_rx_frm_tx_compl(htt->ar, skb); - dev_kfree_skb_any(skb); - } + /* kfifo_get: called only within txrx_tasklet so it's neatly serialized. + * From kfifo_get() documentation: + * Note that with only one concurrent reader and one concurrent writer, + * you don't need extra locking to use these macro. + */ + while (kfifo_get(&htt->txdone_fifo, &tx_done)) + ath10k_txrx_tx_unref(htt, &tx_done); while ((skb = __skb_dequeue(&tx_ind_q))) { ath10k_htt_rx_tx_fetch_ind(ar, skb); diff --git a/drivers/net/wireless/ath/ath10k/htt_tx.c b/drivers/net/wireless/ath/ath10k/htt_tx.c index b2ae122..9baa2e6 100644 --- a/drivers/net/wireless/ath/ath10k/htt_tx.c +++ b/drivers/net/wireless/ath/ath10k/htt_tx.c @@ -339,8 +339,18 @@ int ath10k_htt_tx_alloc(struct ath10k_htt *htt) goto free_frag_desc; } + size = roundup_pow_of_two(htt->max_num_pending_tx); + ret = kfifo_alloc(&htt->txdone_fifo, size, GFP_KERNEL); + if (ret) { + ath10k_err(ar, "failed to alloc txdone fifo: %d\n", ret); + goto free_txq; + } + return 0; +free_txq: + ath10k_htt_tx_free_txq(htt); + free_frag_desc: ath10k_htt_tx_free_cont_frag_desc(htt); @@ -364,8 +374,8 @@ static int ath10k_htt_tx_clean_up_pending(int msdu_id, void *skb, void *ctx) ath10k_dbg(ar, ATH10K_DBG_HTT, "force cleanup msdu_id %hu\n", msdu_id); - tx_done.discard = 1; tx_done.msdu_id = msdu_id; + tx_done.status = HTT_TX_COMPL_STATE_DISCARD; ath10k_txrx_tx_unref(htt, &tx_done); @@ -388,6 +398,8 @@ void ath10k_htt_tx_free(struct ath10k_htt *htt) ath10k_htt_tx_free_txq(htt); ath10k_htt_tx_free_cont_frag_desc(htt); + WARN_ON(!kfifo_is_empty(&htt->txdone_fifo)); + kfifo_free(&htt->txdone_fifo); } void ath10k_htt_htc_tx_complete(struct ath10k *ar, struct sk_buff *skb) diff --git a/drivers/net/wireless/ath/ath10k/txrx.c b/drivers/net/wireless/ath/ath10k/txrx.c index 48e26cd..9369411 100644 --- a/drivers/net/wireless/ath/ath10k/txrx.c +++ b/drivers/net/wireless/ath/ath10k/txrx.c @@ -61,9 +61,8 @@ int ath10k_txrx_tx_unref(struct ath10k_htt *htt, struct sk_buff *msdu; ath10k_dbg(ar, ATH10K_DBG_HTT, - "htt tx completion msdu_id %u discard %d no_ack %d success %d\n", - tx_done->msdu_id, !!tx_done->discard, - !!tx_done->no_ack, !!tx_done->success); + "htt tx completion msdu_id %u status %d\n", + tx_done->msdu_id, tx_done->status); if (tx_done->msdu_id >= htt->max_num_pending_tx) { ath10k_warn(ar, "warning: msdu_id %d too big, ignoring\n", @@ -101,7 +100,7 @@ int ath10k_txrx_tx_unref(struct ath10k_htt *htt, memset(&info->status, 0, sizeof(info->status)); trace_ath10k_txrx_tx_unref(ar, tx_done->msdu_id); - if (tx_done->discard) { + if (tx_done->status == HTT_TX_COMPL_STATE_DISCARD) { ieee80211_free_txskb(htt->ar->hw, msdu); return 0; } @@ -109,10 +108,11 @@ int ath10k_txrx_tx_unref(struct ath10k_htt *htt, if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) info->flags |= IEEE80211_TX_STAT_ACK; - if (tx_done->no_ack) + if (tx_done->status == HTT_TX_COMPL_STATE_NOACK) info->flags &= ~IEEE80211_TX_STAT_ACK; - if (tx_done->success && (info->flags & IEEE80211_TX_CTL_NO_ACK)) + if ((tx_done->status == HTT_TX_COMPL_STATE_ACK) && + (info->flags & IEEE80211_TX_CTL_NO_ACK)) info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED; ieee80211_tx_status(htt->ar->hw, msdu); |