/** * @brief This function will dispatch all packets sequentially * from start_win until a hole is found and adjust the * start_win appropriately * * @param priv A pointer to mlan_private * @param rx_reor_tbl_ptr A pointer to structure RxReorderTbl * * @return MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE */ static mlan_status wlan_11n_scan_and_dispatch(t_void * priv, RxReorderTbl * rx_reor_tbl_ptr) { int i, j, xchg; mlan_status ret = MLAN_STATUS_SUCCESS; void *rx_tmp_ptr = MNULL; mlan_private *pmpriv = (mlan_private *) priv; ENTER(); for (i = 0; i < rx_reor_tbl_ptr->win_size; ++i) { pmpriv->adapter->callbacks.moal_spin_lock(pmpriv->adapter->pmoal_handle, pmpriv->rx_pkt_lock); if (!rx_reor_tbl_ptr->rx_reorder_ptr[i]) { pmpriv->adapter->callbacks.moal_spin_unlock(pmpriv->adapter-> pmoal_handle, pmpriv->rx_pkt_lock); break; } rx_tmp_ptr = rx_reor_tbl_ptr->rx_reorder_ptr[i]; rx_reor_tbl_ptr->rx_reorder_ptr[i] = MNULL; pmpriv->adapter->callbacks.moal_spin_unlock(pmpriv->adapter-> pmoal_handle, pmpriv->rx_pkt_lock); wlan_11n_dispatch_pkt(priv, rx_tmp_ptr); } pmpriv->adapter->callbacks.moal_spin_lock(pmpriv->adapter->pmoal_handle, pmpriv->rx_pkt_lock); /* * We don't have a circular buffer, hence use rotation to simulate * circular buffer */ if (i > 0) { xchg = rx_reor_tbl_ptr->win_size - i; for (j = 0; j < xchg; ++j) { rx_reor_tbl_ptr->rx_reorder_ptr[j] = rx_reor_tbl_ptr->rx_reorder_ptr[i + j]; rx_reor_tbl_ptr->rx_reorder_ptr[i + j] = MNULL; } } rx_reor_tbl_ptr->start_win = (rx_reor_tbl_ptr->start_win + i) & (MAX_TID_VALUE - 1); pmpriv->adapter->callbacks.moal_spin_unlock(pmpriv->adapter->pmoal_handle, pmpriv->rx_pkt_lock); LEAVE(); return ret; }
/** * @brief This function dispatchs all the packets in the buffer. * There could be holes in the buffer. * * @param priv A pointer to mlan_private * @param rx_reor_tbl_ptr A pointer to structure RxReorderTbl * @param start_win Start window * * @return MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE */ static mlan_status wlan_11n_dispatch_pkt_until_start_win(t_void * priv, RxReorderTbl * rx_reor_tbl_ptr, int start_win) { int no_pkt_to_send, i, xchg; mlan_status ret = MLAN_STATUS_SUCCESS; ENTER(); no_pkt_to_send = (start_win > rx_reor_tbl_ptr->start_win) ? MIN((start_win - rx_reor_tbl_ptr->start_win), rx_reor_tbl_ptr->win_size) : rx_reor_tbl_ptr->win_size; for (i = 0; i < no_pkt_to_send; ++i) { if (rx_reor_tbl_ptr->rx_reorder_ptr[i]) { wlan_11n_dispatch_pkt(priv, rx_reor_tbl_ptr->rx_reorder_ptr[i]); rx_reor_tbl_ptr->rx_reorder_ptr[i] = MNULL; } } /* * We don't have a circular buffer, hence use rotation to simulate * circular buffer */ xchg = rx_reor_tbl_ptr->win_size - no_pkt_to_send; for (i = 0; i < xchg; ++i) { rx_reor_tbl_ptr->rx_reorder_ptr[i] = rx_reor_tbl_ptr->rx_reorder_ptr[no_pkt_to_send + i]; rx_reor_tbl_ptr->rx_reorder_ptr[no_pkt_to_send + i] = MNULL; } rx_reor_tbl_ptr->start_win = start_win; LEAVE(); return ret; }
/** * @brief This function will identify if RxReodering is needed for the packet * and will do the reordering if required before sending it to kernel * * @param priv A pointer to mlan_private * @param seq_num Seqence number of the current packet * @param tid Tid of the current packet * @param ta Transmiter address of the current packet * @param pkt_type Packetype for the current packet (to identify if its a BAR) * @param payload Pointer to the payload * * @return MLAN_STATUS_SUCCESS or MLAN_STATUS_FAILURE */ mlan_status mlan_11n_rxreorder_pkt(void *priv, t_u16 seq_num, t_u16 tid, t_u8 * ta, t_u8 pkt_type, void *payload) { RxReorderTbl *rx_reor_tbl_ptr; int start_win, end_win, win_size; mlan_status ret = MLAN_STATUS_SUCCESS; pmlan_adapter pmadapter = ((mlan_private *) priv)->adapter; ENTER(); if (! (rx_reor_tbl_ptr = wlan_11n_get_rxreorder_tbl((mlan_private *) priv, tid, ta))) { LEAVE(); if (pkt_type == PKT_TYPE_BAR) return ret; else { wlan_11n_dispatch_pkt(priv, payload); return ret; } } else { if (pkt_type == PKT_TYPE_BAR) PRINTM(MDAT_D, "BAR "); start_win = rx_reor_tbl_ptr->start_win; win_size = rx_reor_tbl_ptr->win_size; end_win = ((start_win + win_size) - 1) & ~(MAX_TID_VALUE); if (rx_reor_tbl_ptr->timer_context.timer_is_set) pmadapter->callbacks.moal_stop_timer(rx_reor_tbl_ptr->timer_context. timer); pmadapter->callbacks.moal_start_timer(rx_reor_tbl_ptr->timer_context. timer, MFALSE, MIN_FLUSH_TIMER_MS * win_size); rx_reor_tbl_ptr->timer_context.timer_is_set = MTRUE; PRINTM(MDAT_D, "TID %d, TA %02x:%02x:%02x:%02x:%02x:%02x\n", tid, ta[0], ta[1], ta[2], ta[3], ta[4], ta[5]); PRINTM(MDAT_D, "1:seq_num %d start_win %d win_size %d end_win %d\n", seq_num, start_win, win_size, end_win); /* * If seq_num is less then starting win then ignore and drop the * packet */ if ((start_win + TWOPOW11) > (MAX_TID_VALUE - 1)) { /* Wrap */ if (seq_num >= ((start_win + (TWOPOW11)) & ~(MAX_TID_VALUE)) && (seq_num < start_win)) { LEAVE(); return MLAN_STATUS_FAILURE; } } else if ((seq_num < start_win) || (seq_num > (start_win + (TWOPOW11)))) { LEAVE(); return MLAN_STATUS_FAILURE; } /* * If this packet is a BAR we adjust seq_num as * WinStart = seq_num */ if (pkt_type == PKT_TYPE_BAR) seq_num = ((seq_num + win_size) - 1) & ~(MAX_TID_VALUE); PRINTM(MDAT_D, "2:seq_num %d start_win %d win_size %d end_win %d\n", seq_num, start_win, win_size, end_win); if (((end_win < start_win) && (seq_num < (TWOPOW11 - (MAX_TID_VALUE - start_win))) && (seq_num > end_win)) || ((end_win > start_win) && ((seq_num > end_win) || (seq_num < start_win)))) { end_win = seq_num; if (((seq_num - win_size) + 1) >= 0) start_win = (end_win - win_size) + 1; else start_win = (MAX_TID_VALUE - (win_size - seq_num)) + 1; if ((ret = wlan_11n_dispatch_pkt_until_start_win(priv, rx_reor_tbl_ptr, start_win))) { LEAVE(); return ret; } } PRINTM(MDAT_D, "3:seq_num %d start_win %d win_size %d" " end_win %d\n", seq_num, start_win, win_size, end_win); if (pkt_type != PKT_TYPE_BAR) { if (seq_num >= start_win) rx_reor_tbl_ptr->rx_reorder_ptr[seq_num - start_win] = payload; else /* Wrap condition */ rx_reor_tbl_ptr->rx_reorder_ptr[(seq_num + (MAX_TID_VALUE)) - start_win] = payload; } wlan_11n_display_tbl_ptr(pmadapter, rx_reor_tbl_ptr); /* * Dispatch all packets sequentially from start_win until a * hole is found and adjust the start_win appropriately */ ret = wlan_11n_scan_and_dispatch(priv, rx_reor_tbl_ptr); wlan_11n_display_tbl_ptr(pmadapter, rx_reor_tbl_ptr); } LEAVE(); return ret; }