/** * iwlagn_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr] * @trans - transport private data * @txq - tx queue * @index - the index of the TFD to be freed *@dma_dir - the direction of the DMA mapping * * Does NOT advance any TFD circular buffer read/write indexes * Does NOT free the TFD itself (which is within circular buffer) */ void iwlagn_txq_free_tfd(struct iwl_trans *trans, struct iwl_tx_queue *txq, int index, enum dma_data_direction dma_dir) { struct iwl_tfd *tfd_tmp = txq->tfds; lockdep_assert_held(&txq->lock); iwlagn_unmap_tfd(trans, &txq->meta[index], &tfd_tmp[index], dma_dir); /* free SKB */ if (txq->skbs) { struct sk_buff *skb; skb = txq->skbs[index]; /* Can be called from irqs-disabled context * If skb is not NULL, it means that the whole queue is being * freed and that the queue is not empty - free the skb */ if (skb) { iwl_op_mode_free_skb(trans->op_mode, skb); txq->skbs[index] = NULL; } } }
/** * iwl_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr] * @trans - transport private data * @txq - tx queue * @dma_dir - the direction of the DMA mapping * * Does NOT advance any TFD circular buffer read/write indexes * Does NOT free the TFD itself (which is within circular buffer) */ void iwl_txq_free_tfd(struct iwl_trans *trans, struct iwl_tx_queue *txq, enum dma_data_direction dma_dir) { struct iwl_tfd *tfd_tmp = txq->tfds; /* rd_ptr is bounded by n_bd and idx is bounded by n_window */ int rd_ptr = txq->q.read_ptr; int idx = get_cmd_index(&txq->q, rd_ptr); lockdep_assert_held(&txq->lock); /* We have only q->n_window txq->entries, but we use q->n_bd tfds */ iwl_unmap_tfd(trans, &txq->entries[idx].meta, &tfd_tmp[rd_ptr], dma_dir); /* free SKB */ if (txq->entries) { struct sk_buff *skb; skb = txq->entries[idx].skb; /* Can be called from irqs-disabled context * If skb is not NULL, it means that the whole queue is being * freed and that the queue is not empty - free the skb */ if (skb) { iwl_op_mode_free_skb(trans->op_mode, skb); txq->entries[idx].skb = NULL; } } }
static void iwl_pcie_gen2_free_tfd(struct iwl_trans *trans, struct iwl_txq *txq) { /* rd_ptr is bounded by TFD_QUEUE_SIZE_MAX and * idx is bounded by n_window */ int idx = iwl_pcie_get_cmd_index(txq, txq->read_ptr); lockdep_assert_held(&txq->lock); iwl_pcie_gen2_tfd_unmap(trans, &txq->entries[idx].meta, iwl_pcie_get_tfd(trans, txq, idx)); /* free SKB */ if (txq->entries) { struct sk_buff *skb; skb = txq->entries[idx].skb; /* Can be called from irqs-disabled context * If skb is not NULL, it means that the whole queue is being * freed and that the queue is not empty - free the skb */ if (skb) { iwl_op_mode_free_skb(trans->op_mode, skb); txq->entries[idx].skb = NULL; } } }
/* * iwl_pcie_gen2_txq_unmap - Unmap any remaining DMA mappings and free skb's */ void iwl_pcie_gen2_txq_unmap(struct iwl_trans *trans, int txq_id) { struct iwl_trans_pcie *trans_pcie = IWL_TRANS_GET_PCIE_TRANS(trans); struct iwl_txq *txq = trans_pcie->txq[txq_id]; spin_lock_bh(&txq->lock); while (txq->write_ptr != txq->read_ptr) { IWL_DEBUG_TX_REPLY(trans, "Q %d Free %d\n", txq_id, txq->read_ptr); if (txq_id != trans_pcie->cmd_queue) { int idx = iwl_pcie_get_cmd_index(txq, txq->read_ptr); struct sk_buff *skb = txq->entries[idx].skb; if (WARN_ON_ONCE(!skb)) continue; iwl_pcie_free_tso_page(trans_pcie, skb); } iwl_pcie_gen2_free_tfd(trans, txq); txq->read_ptr = iwl_queue_inc_wrap(trans, txq->read_ptr); if (txq->read_ptr == txq->write_ptr) { unsigned long flags; spin_lock_irqsave(&trans_pcie->reg_lock, flags); if (txq_id != trans_pcie->cmd_queue) { IWL_DEBUG_RPM(trans, "Q %d - last tx freed\n", txq->id); iwl_trans_unref(trans); } else if (trans_pcie->ref_cmd_in_flight) { trans_pcie->ref_cmd_in_flight = false; IWL_DEBUG_RPM(trans, "clear ref_cmd_in_flight\n"); iwl_trans_unref(trans); } spin_unlock_irqrestore(&trans_pcie->reg_lock, flags); } } while (!skb_queue_empty(&txq->overflow_q)) { struct sk_buff *skb = __skb_dequeue(&txq->overflow_q); iwl_op_mode_free_skb(trans->op_mode, skb); } spin_unlock_bh(&txq->lock); /* just in case - this queue may have been stopped */ iwl_wake_queue(trans, txq); }
void iwlagn_txq_free_tfd(struct iwl_trans *trans, struct iwl_tx_queue *txq, int index, enum dma_data_direction dma_dir) { struct iwl_tfd *tfd_tmp = txq->tfds; lockdep_assert_held(&txq->lock); iwlagn_unmap_tfd(trans, &txq->meta[index], &tfd_tmp[index], dma_dir); if (txq->skbs) { struct sk_buff *skb; skb = txq->skbs[index]; if (skb) { iwl_op_mode_free_skb(trans->op_mode, skb); txq->skbs[idx] = NULL; } } }