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Message-Id: <20240621075208.513497-9-yu-hao.lin@nxp.com>
Date: Fri, 21 Jun 2024 15:51:33 +0800
From: David Lin <yu-hao.lin@....com>
To: linux-wireless@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
briannorris@...omium.org,
kvalo@...nel.org,
francesco@...cini.it,
tsung-hsien.hsieh@....com,
David Lin <yu-hao.lin@....com>
Subject: [PATCH 08/43] wifi: nxpwifi: add 11n_rxreorder.c
Signed-off-by: David Lin <yu-hao.lin@....com>
---
.../net/wireless/nxp/nxpwifi/11n_rxreorder.c | 928 ++++++++++++++++++
1 file changed, 928 insertions(+)
create mode 100644 drivers/net/wireless/nxp/nxpwifi/11n_rxreorder.c
diff --git a/drivers/net/wireless/nxp/nxpwifi/11n_rxreorder.c b/drivers/net/wireless/nxp/nxpwifi/11n_rxreorder.c
new file mode 100644
index 000000000000..20faab3d6994
--- /dev/null
+++ b/drivers/net/wireless/nxp/nxpwifi/11n_rxreorder.c
@@ -0,0 +1,928 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP Wireless LAN device driver: 802.11n RX Re-ordering
+ *
+ * Copyright 2011-2024 NXP
+ */
+
+#include "decl.h"
+#include "ioctl.h"
+#include "util.h"
+#include "fw.h"
+#include "main.h"
+#include "cmdevt.h"
+#include "wmm.h"
+#include "11n.h"
+#include "11n_rxreorder.h"
+
+/* This function will dispatch amsdu packet and forward it to kernel/upper
+ * layer.
+ */
+static int nxpwifi_11n_dispatch_amsdu_pkt(struct nxpwifi_private *priv,
+ struct sk_buff *skb)
+{
+ struct rxpd *local_rx_pd = (struct rxpd *)(skb->data);
+ int ret;
+
+ if (le16_to_cpu(local_rx_pd->rx_pkt_type) == PKT_TYPE_AMSDU) {
+ struct sk_buff_head list;
+ struct sk_buff *rx_skb;
+
+ __skb_queue_head_init(&list);
+
+ skb_pull(skb, le16_to_cpu(local_rx_pd->rx_pkt_offset));
+ skb_trim(skb, le16_to_cpu(local_rx_pd->rx_pkt_length));
+
+ ieee80211_amsdu_to_8023s(skb, &list, priv->curr_addr,
+ priv->wdev.iftype, 0, NULL, NULL, false);
+
+ while (!skb_queue_empty(&list)) {
+ struct rx_packet_hdr *rx_hdr;
+
+ rx_skb = __skb_dequeue(&list);
+ rx_hdr = (struct rx_packet_hdr *)rx_skb->data;
+
+ if (priv->bss_role == NXPWIFI_BSS_ROLE_UAP)
+ ret = nxpwifi_uap_recv_packet(priv, rx_skb);
+ else
+ ret = nxpwifi_recv_packet(priv, rx_skb);
+ if (ret == -1)
+ nxpwifi_dbg(priv->adapter, ERROR,
+ "Rx of A-MSDU failed");
+ }
+ return 0;
+ }
+
+ return -1;
+}
+
+/* This function will process the rx packet and forward it to kernel/upper
+ * layer.
+ */
+static int nxpwifi_11n_dispatch_pkt(struct nxpwifi_private *priv,
+ struct sk_buff *payload)
+{
+ int ret;
+
+ if (!payload) {
+ nxpwifi_dbg(priv->adapter, INFO, "info: fw drop data\n");
+ return 0;
+ }
+
+ ret = nxpwifi_11n_dispatch_amsdu_pkt(priv, payload);
+ if (!ret)
+ return 0;
+
+ if (priv->bss_role == NXPWIFI_BSS_ROLE_UAP)
+ return nxpwifi_handle_uap_rx_forward(priv, payload);
+
+ return nxpwifi_process_rx_packet(priv, payload);
+}
+
+/* This function dispatches all packets in the Rx reorder table until the
+ * start window.
+ *
+ * There could be holes in the buffer, which are skipped by the function.
+ * Since the buffer is linear, the function uses rotation to simulate
+ * circular buffer.
+ */
+static void
+nxpwifi_11n_dispatch_pkt_until_start_win(struct nxpwifi_private *priv,
+ struct nxpwifi_rx_reorder_tbl *tbl,
+ int start_win)
+{
+ struct sk_buff_head list;
+ struct sk_buff *skb;
+ int pkt_to_send, i;
+
+ __skb_queue_head_init(&list);
+ spin_lock_bh(&priv->rx_reorder_tbl_lock);
+
+ pkt_to_send = (start_win > tbl->start_win) ?
+ min((start_win - tbl->start_win), tbl->win_size) :
+ tbl->win_size;
+
+ for (i = 0; i < pkt_to_send; ++i) {
+ if (tbl->rx_reorder_ptr[i]) {
+ skb = tbl->rx_reorder_ptr[i];
+ __skb_queue_tail(&list, skb);
+ tbl->rx_reorder_ptr[i] = NULL;
+ }
+ }
+
+ /* We don't have a circular buffer, hence use rotation to simulate
+ * circular buffer
+ */
+ for (i = 0; i < tbl->win_size - pkt_to_send; ++i) {
+ tbl->rx_reorder_ptr[i] = tbl->rx_reorder_ptr[pkt_to_send + i];
+ tbl->rx_reorder_ptr[pkt_to_send + i] = NULL;
+ }
+
+ tbl->start_win = start_win;
+ spin_unlock_bh(&priv->rx_reorder_tbl_lock);
+
+ while ((skb = __skb_dequeue(&list)))
+ nxpwifi_11n_dispatch_pkt(priv, skb);
+}
+
+/* This function dispatches all packets in the Rx reorder table until
+ * a hole is found.
+ *
+ * The start window is adjusted automatically when a hole is located.
+ * Since the buffer is linear, the function uses rotation to simulate
+ * circular buffer.
+ */
+static void
+nxpwifi_11n_scan_and_dispatch(struct nxpwifi_private *priv,
+ struct nxpwifi_rx_reorder_tbl *tbl)
+{
+ struct sk_buff_head list;
+ struct sk_buff *skb;
+ int i, j, xchg;
+
+ __skb_queue_head_init(&list);
+ spin_lock_bh(&priv->rx_reorder_tbl_lock);
+
+ for (i = 0; i < tbl->win_size; ++i) {
+ if (!tbl->rx_reorder_ptr[i])
+ break;
+ skb = tbl->rx_reorder_ptr[i];
+ __skb_queue_tail(&list, skb);
+ tbl->rx_reorder_ptr[i] = NULL;
+ }
+
+ /* We don't have a circular buffer, hence use rotation to simulate
+ * circular buffer
+ */
+ if (i > 0) {
+ xchg = tbl->win_size - i;
+ for (j = 0; j < xchg; ++j) {
+ tbl->rx_reorder_ptr[j] = tbl->rx_reorder_ptr[i + j];
+ tbl->rx_reorder_ptr[i + j] = NULL;
+ }
+ }
+ tbl->start_win = (tbl->start_win + i) & (MAX_TID_VALUE - 1);
+
+ spin_unlock_bh(&priv->rx_reorder_tbl_lock);
+
+ while ((skb = __skb_dequeue(&list)))
+ nxpwifi_11n_dispatch_pkt(priv, skb);
+}
+
+/* This function deletes the Rx reorder table and frees the memory.
+ *
+ * The function stops the associated timer and dispatches all the
+ * pending packets in the Rx reorder table before deletion.
+ */
+static void
+nxpwifi_del_rx_reorder_entry(struct nxpwifi_private *priv,
+ struct nxpwifi_rx_reorder_tbl *tbl)
+{
+ int start_win;
+
+ if (!tbl)
+ return;
+
+ spin_lock_bh(&priv->adapter->rx_proc_lock);
+ priv->adapter->rx_locked = true;
+ if (priv->adapter->rx_processing) {
+ spin_unlock_bh(&priv->adapter->rx_proc_lock);
+ flush_workqueue(priv->adapter->rx_workqueue);
+ } else {
+ spin_unlock_bh(&priv->adapter->rx_proc_lock);
+ }
+
+ start_win = (tbl->start_win + tbl->win_size) & (MAX_TID_VALUE - 1);
+ nxpwifi_11n_dispatch_pkt_until_start_win(priv, tbl, start_win);
+
+ del_timer_sync(&tbl->timer_context.timer);
+ tbl->timer_context.timer_is_set = false;
+
+ spin_lock_bh(&priv->rx_reorder_tbl_lock);
+ list_del(&tbl->list);
+ spin_unlock_bh(&priv->rx_reorder_tbl_lock);
+
+ kfree(tbl->rx_reorder_ptr);
+ kfree(tbl);
+
+ spin_lock_bh(&priv->adapter->rx_proc_lock);
+ priv->adapter->rx_locked = false;
+ spin_unlock_bh(&priv->adapter->rx_proc_lock);
+}
+
+/* This function returns the pointer to an entry in Rx reordering
+ * table which matches the given TA/TID pair.
+ */
+struct nxpwifi_rx_reorder_tbl *
+nxpwifi_11n_get_rx_reorder_tbl(struct nxpwifi_private *priv, int tid, u8 *ta)
+{
+ struct nxpwifi_rx_reorder_tbl *tbl;
+
+ spin_lock_bh(&priv->rx_reorder_tbl_lock);
+ list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list) {
+ if (!memcmp(tbl->ta, ta, ETH_ALEN) && tbl->tid == tid) {
+ spin_unlock_bh(&priv->rx_reorder_tbl_lock);
+ return tbl;
+ }
+ }
+ spin_unlock_bh(&priv->rx_reorder_tbl_lock);
+
+ return NULL;
+}
+
+/* This function retrieves the pointer to an entry in Rx reordering
+ * table which matches the given TA and deletes it.
+ */
+void nxpwifi_11n_del_rx_reorder_tbl_by_ta(struct nxpwifi_private *priv, u8 *ta)
+{
+ struct nxpwifi_rx_reorder_tbl *tbl, *tmp;
+
+ if (!ta)
+ return;
+
+ spin_lock_bh(&priv->rx_reorder_tbl_lock);
+ list_for_each_entry_safe(tbl, tmp, &priv->rx_reorder_tbl_ptr, list) {
+ if (!memcmp(tbl->ta, ta, ETH_ALEN)) {
+ spin_unlock_bh(&priv->rx_reorder_tbl_lock);
+ nxpwifi_del_rx_reorder_entry(priv, tbl);
+ spin_lock_bh(&priv->rx_reorder_tbl_lock);
+ }
+ }
+ spin_unlock_bh(&priv->rx_reorder_tbl_lock);
+}
+
+/* This function finds the last sequence number used in the packets
+ * buffered in Rx reordering table.
+ */
+static int
+nxpwifi_11n_find_last_seq_num(struct reorder_tmr_cnxt *ctx)
+{
+ struct nxpwifi_rx_reorder_tbl *rx_reorder_tbl_ptr = ctx->ptr;
+ struct nxpwifi_private *priv = ctx->priv;
+ int i;
+
+ spin_lock_bh(&priv->rx_reorder_tbl_lock);
+ for (i = rx_reorder_tbl_ptr->win_size - 1; i >= 0; --i) {
+ if (rx_reorder_tbl_ptr->rx_reorder_ptr[i]) {
+ spin_unlock_bh(&priv->rx_reorder_tbl_lock);
+ return i;
+ }
+ }
+ spin_unlock_bh(&priv->rx_reorder_tbl_lock);
+
+ return -1;
+}
+
+/* This function flushes all the packets in Rx reordering table.
+ *
+ * The function checks if any packets are currently buffered in the
+ * table or not. In case there are packets available, it dispatches
+ * them and then dumps the Rx reordering table.
+ */
+static void
+nxpwifi_flush_data(struct timer_list *t)
+{
+ struct reorder_tmr_cnxt *ctx =
+ from_timer(ctx, t, timer);
+ int start_win, seq_num;
+
+ ctx->timer_is_set = false;
+ seq_num = nxpwifi_11n_find_last_seq_num(ctx);
+
+ if (seq_num < 0)
+ return;
+
+ nxpwifi_dbg(ctx->priv->adapter, INFO, "info: flush data %d\n", seq_num);
+ start_win = (ctx->ptr->start_win + seq_num + 1) & (MAX_TID_VALUE - 1);
+ nxpwifi_11n_dispatch_pkt_until_start_win(ctx->priv, ctx->ptr,
+ start_win);
+}
+
+/* This function creates an entry in Rx reordering table for the
+ * given TA/TID.
+ *
+ * The function also initializes the entry with sequence number, window
+ * size as well as initializes the timer.
+ *
+ * If the received TA/TID pair is already present, all the packets are
+ * dispatched and the window size is moved until the SSN.
+ */
+static void
+nxpwifi_11n_create_rx_reorder_tbl(struct nxpwifi_private *priv, u8 *ta,
+ int tid, int win_size, int seq_num)
+{
+ int i;
+ struct nxpwifi_rx_reorder_tbl *tbl, *new_node;
+ u16 last_seq = 0;
+ struct nxpwifi_sta_node *node;
+
+ /* If we get a TID, ta pair which is already present dispatch all
+ * the packets and move the window size until the ssn
+ */
+ tbl = nxpwifi_11n_get_rx_reorder_tbl(priv, tid, ta);
+ if (tbl) {
+ nxpwifi_11n_dispatch_pkt_until_start_win(priv, tbl, seq_num);
+ return;
+ }
+ /* if !tbl then create one */
+ new_node = kzalloc(sizeof(*new_node), GFP_KERNEL);
+ if (!new_node)
+ return;
+
+ INIT_LIST_HEAD(&new_node->list);
+ new_node->tid = tid;
+ memcpy(new_node->ta, ta, ETH_ALEN);
+ new_node->start_win = seq_num;
+ new_node->init_win = seq_num;
+ new_node->flags = 0;
+
+ spin_lock_bh(&priv->sta_list_spinlock);
+ if (nxpwifi_queuing_ra_based(priv)) {
+ if (priv->bss_role == NXPWIFI_BSS_ROLE_UAP) {
+ node = nxpwifi_get_sta_entry(priv, ta);
+ if (node)
+ last_seq = node->rx_seq[tid];
+ }
+ } else {
+ node = nxpwifi_get_sta_entry(priv, ta);
+ if (node)
+ last_seq = node->rx_seq[tid];
+ else
+ last_seq = priv->rx_seq[tid];
+ }
+ spin_unlock_bh(&priv->sta_list_spinlock);
+
+ nxpwifi_dbg(priv->adapter, INFO,
+ "info: last_seq=%d start_win=%d\n",
+ last_seq, new_node->start_win);
+
+ if (last_seq != NXPWIFI_DEF_11N_RX_SEQ_NUM &&
+ last_seq >= new_node->start_win) {
+ new_node->start_win = last_seq + 1;
+ new_node->flags |= RXREOR_INIT_WINDOW_SHIFT;
+ }
+
+ new_node->win_size = win_size;
+
+ new_node->rx_reorder_ptr = kcalloc(win_size, sizeof(void *),
+ GFP_KERNEL);
+ if (!new_node->rx_reorder_ptr) {
+ kfree(new_node);
+ nxpwifi_dbg(priv->adapter, ERROR,
+ "%s: failed to alloc reorder_ptr\n", __func__);
+ return;
+ }
+
+ new_node->timer_context.ptr = new_node;
+ new_node->timer_context.priv = priv;
+ new_node->timer_context.timer_is_set = false;
+
+ timer_setup(&new_node->timer_context.timer, nxpwifi_flush_data, 0);
+
+ for (i = 0; i < win_size; ++i)
+ new_node->rx_reorder_ptr[i] = NULL;
+
+ spin_lock_bh(&priv->rx_reorder_tbl_lock);
+ list_add_tail(&new_node->list, &priv->rx_reorder_tbl_ptr);
+ spin_unlock_bh(&priv->rx_reorder_tbl_lock);
+}
+
+static void
+nxpwifi_11n_rxreorder_timer_restart(struct nxpwifi_rx_reorder_tbl *tbl)
+{
+ u32 min_flush_time;
+
+ if (tbl->win_size >= NXPWIFI_BA_WIN_SIZE_32)
+ min_flush_time = MIN_FLUSH_TIMER_15_MS;
+ else
+ min_flush_time = MIN_FLUSH_TIMER_MS;
+
+ mod_timer(&tbl->timer_context.timer,
+ jiffies + msecs_to_jiffies(min_flush_time * tbl->win_size));
+
+ tbl->timer_context.timer_is_set = true;
+}
+
+/* This function prepares command for adding a BA request.
+ *
+ * Preparation includes -
+ * - Setting command ID and proper size
+ * - Setting add BA request buffer
+ * - Ensuring correct endian-ness
+ */
+int nxpwifi_cmd_11n_addba_req(struct host_cmd_ds_command *cmd, void *data_buf)
+{
+ struct host_cmd_ds_11n_addba_req *add_ba_req = &cmd->params.add_ba_req;
+
+ cmd->command = cpu_to_le16(HOST_CMD_11N_ADDBA_REQ);
+ cmd->size = cpu_to_le16(sizeof(*add_ba_req) + S_DS_GEN);
+ memcpy(add_ba_req, data_buf, sizeof(*add_ba_req));
+
+ return 0;
+}
+
+/* This function prepares command for adding a BA response.
+ *
+ * Preparation includes -
+ * - Setting command ID and proper size
+ * - Setting add BA response buffer
+ * - Ensuring correct endian-ness
+ */
+int nxpwifi_cmd_11n_addba_rsp_gen(struct nxpwifi_private *priv,
+ struct host_cmd_ds_command *cmd,
+ struct host_cmd_ds_11n_addba_req
+ *cmd_addba_req)
+{
+ struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &cmd->params.add_ba_rsp;
+ u32 rx_win_size = priv->add_ba_param.rx_win_size;
+ u8 tid;
+ int win_size;
+ u16 block_ack_param_set;
+
+ cmd->command = cpu_to_le16(HOST_CMD_11N_ADDBA_RSP);
+ cmd->size = cpu_to_le16(sizeof(*add_ba_rsp) + S_DS_GEN);
+
+ memcpy(add_ba_rsp->peer_mac_addr, cmd_addba_req->peer_mac_addr,
+ ETH_ALEN);
+ add_ba_rsp->dialog_token = cmd_addba_req->dialog_token;
+ add_ba_rsp->block_ack_tmo = cmd_addba_req->block_ack_tmo;
+ add_ba_rsp->ssn = cmd_addba_req->ssn;
+
+ block_ack_param_set = le16_to_cpu(cmd_addba_req->block_ack_param_set);
+ tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK)
+ >> BLOCKACKPARAM_TID_POS;
+ add_ba_rsp->status_code = cpu_to_le16(ADDBA_RSP_STATUS_ACCEPT);
+ block_ack_param_set &= ~IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK;
+
+ /* If we don't support AMSDU inside AMPDU, reset the bit */
+ if (!priv->add_ba_param.rx_amsdu ||
+ priv->aggr_prio_tbl[tid].amsdu == BA_STREAM_NOT_ALLOWED)
+ block_ack_param_set &= ~BLOCKACKPARAM_AMSDU_SUPP_MASK;
+ block_ack_param_set |= rx_win_size << BLOCKACKPARAM_WINSIZE_POS;
+ add_ba_rsp->block_ack_param_set = cpu_to_le16(block_ack_param_set);
+ win_size = (le16_to_cpu(add_ba_rsp->block_ack_param_set)
+ & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK)
+ >> BLOCKACKPARAM_WINSIZE_POS;
+ cmd_addba_req->block_ack_param_set = cpu_to_le16(block_ack_param_set);
+
+ nxpwifi_11n_create_rx_reorder_tbl(priv, cmd_addba_req->peer_mac_addr,
+ tid, win_size,
+ le16_to_cpu(cmd_addba_req->ssn));
+ return 0;
+}
+
+/* This function prepares command for deleting a BA request.
+ *
+ * Preparation includes -
+ * - Setting command ID and proper size
+ * - Setting del BA request buffer
+ * - Ensuring correct endian-ness
+ */
+int nxpwifi_cmd_11n_delba(struct host_cmd_ds_command *cmd, void *data_buf)
+{
+ struct host_cmd_ds_11n_delba *del_ba = &cmd->params.del_ba;
+
+ cmd->command = cpu_to_le16(HOST_CMD_11N_DELBA);
+ cmd->size = cpu_to_le16(sizeof(*del_ba) + S_DS_GEN);
+ memcpy(del_ba, data_buf, sizeof(*del_ba));
+
+ return 0;
+}
+
+/* This function identifies if Rx reordering is needed for a received packet.
+ *
+ * In case reordering is required, the function will do the reordering
+ * before sending it to kernel.
+ *
+ * The Rx reorder table is checked first with the received TID/TA pair. If
+ * not found, the received packet is dispatched immediately. But if found,
+ * the packet is reordered and all the packets in the updated Rx reordering
+ * table is dispatched until a hole is found.
+ *
+ * For sequence number less than the starting window, the packet is dropped.
+ */
+int nxpwifi_11n_rx_reorder_pkt(struct nxpwifi_private *priv,
+ u16 seq_num, u16 tid,
+ u8 *ta, u8 pkt_type, void *payload)
+{
+ struct nxpwifi_rx_reorder_tbl *tbl;
+ int prev_start_win, start_win, end_win, win_size;
+ u16 pkt_index;
+ bool init_window_shift = false;
+ int ret = 0;
+
+ tbl = nxpwifi_11n_get_rx_reorder_tbl(priv, tid, ta);
+ if (!tbl) {
+ if (pkt_type != PKT_TYPE_BAR)
+ nxpwifi_11n_dispatch_pkt(priv, payload);
+ return ret;
+ }
+
+ if (pkt_type == PKT_TYPE_AMSDU && !tbl->amsdu) {
+ nxpwifi_11n_dispatch_pkt(priv, payload);
+ return ret;
+ }
+
+ start_win = tbl->start_win;
+ prev_start_win = start_win;
+ win_size = tbl->win_size;
+ end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1);
+ if (tbl->flags & RXREOR_INIT_WINDOW_SHIFT) {
+ init_window_shift = true;
+ tbl->flags &= ~RXREOR_INIT_WINDOW_SHIFT;
+ }
+
+ if (tbl->flags & RXREOR_FORCE_NO_DROP) {
+ nxpwifi_dbg(priv->adapter, INFO,
+ "RXREOR_FORCE_NO_DROP when HS is activated\n");
+ tbl->flags &= ~RXREOR_FORCE_NO_DROP;
+ } else if (init_window_shift && seq_num < start_win &&
+ seq_num >= tbl->init_win) {
+ nxpwifi_dbg(priv->adapter, INFO,
+ "Sender TID sequence number reset %d->%d for SSN %d\n",
+ start_win, seq_num, tbl->init_win);
+ start_win = seq_num;
+ tbl->start_win = start_win;
+ end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1);
+ } else {
+ /* If seq_num is less then starting win then ignore and drop
+ * the packet
+ */
+ if ((start_win + TWOPOW11) > (MAX_TID_VALUE - 1)) {
+ if (seq_num >= ((start_win + TWOPOW11) &
+ (MAX_TID_VALUE - 1)) &&
+ seq_num < start_win) {
+ ret = -1;
+ goto done;
+ }
+ } else if ((seq_num < start_win) ||
+ (seq_num >= (start_win + TWOPOW11))) {
+ ret = -1;
+ goto done;
+ }
+ }
+
+ /* 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 - 1);
+
+ if ((end_win < start_win &&
+ seq_num < start_win && seq_num > end_win) ||
+ (end_win > start_win && (seq_num > end_win ||
+ seq_num < start_win))) {
+ end_win = seq_num;
+ if (((end_win - win_size) + 1) >= 0)
+ start_win = (end_win - win_size) + 1;
+ else
+ start_win = (MAX_TID_VALUE - (win_size - end_win)) + 1;
+ nxpwifi_11n_dispatch_pkt_until_start_win(priv, tbl, start_win);
+ }
+
+ if (pkt_type != PKT_TYPE_BAR) {
+ if (seq_num >= start_win)
+ pkt_index = seq_num - start_win;
+ else
+ pkt_index = (seq_num + MAX_TID_VALUE) - start_win;
+
+ if (tbl->rx_reorder_ptr[pkt_index]) {
+ ret = -1;
+ goto done;
+ }
+
+ tbl->rx_reorder_ptr[pkt_index] = payload;
+ }
+
+ /* Dispatch all packets sequentially from start_win until a
+ * hole is found and adjust the start_win appropriately
+ */
+ nxpwifi_11n_scan_and_dispatch(priv, tbl);
+
+done:
+ if (!tbl->timer_context.timer_is_set ||
+ prev_start_win != tbl->start_win)
+ nxpwifi_11n_rxreorder_timer_restart(tbl);
+ return ret;
+}
+
+/* This function deletes an entry for a given TID/TA pair.
+ *
+ * The TID/TA are taken from del BA event body.
+ */
+void
+nxpwifi_del_ba_tbl(struct nxpwifi_private *priv, int tid, u8 *peer_mac,
+ u8 type, int initiator)
+{
+ struct nxpwifi_rx_reorder_tbl *tbl;
+ struct nxpwifi_tx_ba_stream_tbl *ptx_tbl;
+ struct nxpwifi_ra_list_tbl *ra_list;
+ u8 cleanup_rx_reorder_tbl;
+ int tid_down;
+
+ if (type == TYPE_DELBA_RECEIVE)
+ cleanup_rx_reorder_tbl = (initiator) ? true : false;
+ else
+ cleanup_rx_reorder_tbl = (initiator) ? false : true;
+
+ nxpwifi_dbg(priv->adapter, EVENT, "event: DELBA: %pM tid=%d initiator=%d\n",
+ peer_mac, tid, initiator);
+
+ if (cleanup_rx_reorder_tbl) {
+ tbl = nxpwifi_11n_get_rx_reorder_tbl(priv, tid, peer_mac);
+ if (!tbl) {
+ nxpwifi_dbg(priv->adapter, EVENT,
+ "event: TID, TA not found in table\n");
+ return;
+ }
+ nxpwifi_del_rx_reorder_entry(priv, tbl);
+ } else {
+ ptx_tbl = nxpwifi_get_ba_tbl(priv, tid, peer_mac);
+ if (!ptx_tbl) {
+ nxpwifi_dbg(priv->adapter, EVENT,
+ "event: TID, RA not found in table\n");
+ return;
+ }
+
+ tid_down = nxpwifi_wmm_downgrade_tid(priv, tid);
+ ra_list = nxpwifi_wmm_get_ralist_node(priv, tid_down, peer_mac);
+ if (ra_list) {
+ ra_list->amsdu_in_ampdu = false;
+ ra_list->ba_status = BA_SETUP_NONE;
+ }
+ spin_lock_bh(&priv->tx_ba_stream_tbl_lock);
+ nxpwifi_11n_delete_tx_ba_stream_tbl_entry(priv, ptx_tbl);
+ spin_unlock_bh(&priv->tx_ba_stream_tbl_lock);
+ }
+}
+
+/* This function handles the command response of an add BA response.
+ *
+ * Handling includes changing the header fields into CPU format and
+ * creating the stream, provided the add BA is accepted.
+ */
+int nxpwifi_ret_11n_addba_resp(struct nxpwifi_private *priv,
+ struct host_cmd_ds_command *resp)
+{
+ struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &resp->params.add_ba_rsp;
+ int tid, win_size;
+ struct nxpwifi_rx_reorder_tbl *tbl;
+ u16 block_ack_param_set;
+
+ block_ack_param_set = le16_to_cpu(add_ba_rsp->block_ack_param_set);
+
+ tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK)
+ >> BLOCKACKPARAM_TID_POS;
+ /* Check if we had rejected the ADDBA, if yes then do not create
+ * the stream
+ */
+ if (le16_to_cpu(add_ba_rsp->status_code) != BA_RESULT_SUCCESS) {
+ nxpwifi_dbg(priv->adapter, ERROR, "ADDBA RSP: failed %pM tid=%d)\n",
+ add_ba_rsp->peer_mac_addr, tid);
+
+ tbl = nxpwifi_11n_get_rx_reorder_tbl(priv, tid,
+ add_ba_rsp->peer_mac_addr);
+ if (tbl)
+ nxpwifi_del_rx_reorder_entry(priv, tbl);
+
+ return 0;
+ }
+
+ win_size = (block_ack_param_set & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK)
+ >> BLOCKACKPARAM_WINSIZE_POS;
+
+ tbl = nxpwifi_11n_get_rx_reorder_tbl(priv, tid,
+ add_ba_rsp->peer_mac_addr);
+ if (tbl) {
+ if ((block_ack_param_set & BLOCKACKPARAM_AMSDU_SUPP_MASK) &&
+ priv->add_ba_param.rx_amsdu &&
+ priv->aggr_prio_tbl[tid].amsdu != BA_STREAM_NOT_ALLOWED)
+ tbl->amsdu = true;
+ else
+ tbl->amsdu = false;
+ }
+
+ nxpwifi_dbg(priv->adapter, CMD,
+ "cmd: ADDBA RSP: %pM tid=%d ssn=%d win_size=%d\n",
+ add_ba_rsp->peer_mac_addr, tid, add_ba_rsp->ssn, win_size);
+
+ return 0;
+}
+
+/* This function handles BA stream timeout event by preparing and sending
+ * a command to the firmware.
+ */
+void nxpwifi_11n_ba_stream_timeout(struct nxpwifi_private *priv,
+ struct host_cmd_ds_11n_batimeout *event)
+{
+ struct host_cmd_ds_11n_delba delba;
+
+ memset(&delba, 0, sizeof(struct host_cmd_ds_11n_delba));
+ memcpy(delba.peer_mac_addr, event->peer_mac_addr, ETH_ALEN);
+
+ delba.del_ba_param_set |=
+ cpu_to_le16((u16)event->tid << DELBA_TID_POS);
+ delba.del_ba_param_set |=
+ cpu_to_le16((u16)event->origninator << DELBA_INITIATOR_POS);
+ delba.reason_code = cpu_to_le16(WLAN_REASON_QSTA_TIMEOUT);
+ nxpwifi_send_cmd(priv, HOST_CMD_11N_DELBA, 0, 0, &delba, false);
+}
+
+/* This function cleans up the Rx reorder table by deleting all the entries
+ * and re-initializing.
+ */
+void nxpwifi_11n_cleanup_reorder_tbl(struct nxpwifi_private *priv)
+{
+ struct nxpwifi_rx_reorder_tbl *del_tbl_ptr, *tmp_node;
+
+ spin_lock_bh(&priv->rx_reorder_tbl_lock);
+ list_for_each_entry_safe(del_tbl_ptr, tmp_node,
+ &priv->rx_reorder_tbl_ptr, list) {
+ spin_unlock_bh(&priv->rx_reorder_tbl_lock);
+ nxpwifi_del_rx_reorder_entry(priv, del_tbl_ptr);
+ spin_lock_bh(&priv->rx_reorder_tbl_lock);
+ }
+ INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
+ spin_unlock_bh(&priv->rx_reorder_tbl_lock);
+
+ nxpwifi_reset_11n_rx_seq_num(priv);
+}
+
+/* This function updates all rx_reorder_tbl's flags.
+ */
+void nxpwifi_update_rxreor_flags(struct nxpwifi_adapter *adapter, u8 flags)
+{
+ struct nxpwifi_private *priv;
+ struct nxpwifi_rx_reorder_tbl *tbl;
+ int i;
+
+ for (i = 0; i < adapter->priv_num; i++) {
+ priv = adapter->priv[i];
+ if (!priv)
+ continue;
+
+ spin_lock_bh(&priv->rx_reorder_tbl_lock);
+ list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list)
+ tbl->flags = flags;
+ spin_unlock_bh(&priv->rx_reorder_tbl_lock);
+ }
+}
+
+/* This function update all the rx_win_size based on coex flag
+ */
+static void nxpwifi_update_ampdu_rxwinsize(struct nxpwifi_adapter *adapter,
+ bool coex_flag)
+{
+ u8 i;
+ u32 rx_win_size;
+ struct nxpwifi_private *priv;
+
+ dev_dbg(adapter->dev, "Update rxwinsize %d\n", coex_flag);
+
+ for (i = 0; i < adapter->priv_num; i++) {
+ if (!adapter->priv[i])
+ continue;
+ priv = adapter->priv[i];
+ rx_win_size = priv->add_ba_param.rx_win_size;
+ if (coex_flag) {
+ if (priv->bss_type == NXPWIFI_BSS_TYPE_STA)
+ priv->add_ba_param.rx_win_size =
+ NXPWIFI_STA_COEX_AMPDU_DEF_RXWINSIZE;
+ if (priv->bss_type == NXPWIFI_BSS_TYPE_UAP)
+ priv->add_ba_param.rx_win_size =
+ NXPWIFI_UAP_COEX_AMPDU_DEF_RXWINSIZE;
+ } else {
+ if (priv->bss_type == NXPWIFI_BSS_TYPE_STA)
+ priv->add_ba_param.rx_win_size =
+ NXPWIFI_STA_AMPDU_DEF_RXWINSIZE;
+ if (priv->bss_type == NXPWIFI_BSS_TYPE_UAP)
+ priv->add_ba_param.rx_win_size =
+ NXPWIFI_UAP_AMPDU_DEF_RXWINSIZE;
+ }
+
+ if (adapter->coex_win_size && adapter->coex_rx_win_size)
+ priv->add_ba_param.rx_win_size =
+ adapter->coex_rx_win_size;
+
+ if (rx_win_size != priv->add_ba_param.rx_win_size) {
+ if (!priv->media_connected)
+ continue;
+ for (i = 0; i < MAX_NUM_TID; i++)
+ nxpwifi_11n_delba(priv, i);
+ }
+ }
+}
+
+/* This function check coex for RX BA
+ */
+void nxpwifi_coex_ampdu_rxwinsize(struct nxpwifi_adapter *adapter)
+{
+ u8 i;
+ struct nxpwifi_private *priv;
+ u8 count = 0;
+
+ for (i = 0; i < adapter->priv_num; i++) {
+ if (adapter->priv[i]) {
+ priv = adapter->priv[i];
+ if (GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_STA) {
+ if (priv->media_connected)
+ count++;
+ }
+ if (GET_BSS_ROLE(priv) == NXPWIFI_BSS_ROLE_UAP) {
+ if (priv->bss_started)
+ count++;
+ }
+ }
+ if (count >= NXPWIFI_BSS_COEX_COUNT)
+ break;
+ }
+ if (count >= NXPWIFI_BSS_COEX_COUNT)
+ nxpwifi_update_ampdu_rxwinsize(adapter, true);
+ else
+ nxpwifi_update_ampdu_rxwinsize(adapter, false);
+}
+
+/* This function handles rxba_sync event
+ */
+void nxpwifi_11n_rxba_sync_event(struct nxpwifi_private *priv,
+ u8 *event_buf, u16 len)
+{
+ struct nxpwifi_ie_types_rxba_sync *tlv_rxba = (void *)event_buf;
+ u16 tlv_type, tlv_len;
+ struct nxpwifi_rx_reorder_tbl *rx_reor_tbl_ptr;
+ u8 i, j;
+ u16 seq_num, tlv_seq_num, tlv_bitmap_len;
+ int tlv_buf_left = len;
+ int ret;
+ u8 *tmp;
+
+ nxpwifi_dbg_dump(priv->adapter, EVT_D, "RXBA_SYNC event:",
+ event_buf, len);
+ while (tlv_buf_left > sizeof(*tlv_rxba)) {
+ tlv_type = le16_to_cpu(tlv_rxba->header.type);
+ tlv_len = le16_to_cpu(tlv_rxba->header.len);
+ if (size_add(sizeof(tlv_rxba->header), tlv_len) > tlv_buf_left) {
+ nxpwifi_dbg(priv->adapter, WARN,
+ "TLV size (%zu) overflows event_buf buf_left=%d\n",
+ size_add(sizeof(tlv_rxba->header), tlv_len),
+ tlv_buf_left);
+ return;
+ }
+
+ if (tlv_type != TLV_TYPE_RXBA_SYNC) {
+ nxpwifi_dbg(priv->adapter, ERROR,
+ "Wrong TLV id=0x%x\n", tlv_type);
+ return;
+ }
+
+ tlv_seq_num = le16_to_cpu(tlv_rxba->seq_num);
+ tlv_bitmap_len = le16_to_cpu(tlv_rxba->bitmap_len);
+ if (size_add(sizeof(*tlv_rxba), tlv_bitmap_len) > tlv_buf_left) {
+ nxpwifi_dbg(priv->adapter, WARN,
+ "TLV size (%zu) overflows event_buf buf_left=%d\n",
+ size_add(sizeof(*tlv_rxba), tlv_bitmap_len),
+ tlv_buf_left);
+ return;
+ }
+
+ nxpwifi_dbg(priv->adapter, INFO,
+ "%pM tid=%d seq_num=%d bitmap_len=%d\n",
+ tlv_rxba->mac, tlv_rxba->tid, tlv_seq_num,
+ tlv_bitmap_len);
+
+ rx_reor_tbl_ptr =
+ nxpwifi_11n_get_rx_reorder_tbl(priv, tlv_rxba->tid,
+ tlv_rxba->mac);
+ if (!rx_reor_tbl_ptr) {
+ nxpwifi_dbg(priv->adapter, ERROR,
+ "Can not find rx_reorder_tbl!");
+ return;
+ }
+
+ for (i = 0; i < tlv_bitmap_len; i++) {
+ for (j = 0 ; j < 8; j++) {
+ if (tlv_rxba->bitmap[i] & (1 << j)) {
+ seq_num = (MAX_TID_VALUE - 1) &
+ (tlv_seq_num + i * 8 + j);
+
+ nxpwifi_dbg(priv->adapter, ERROR,
+ "drop packet,seq=%d\n",
+ seq_num);
+
+ ret = nxpwifi_11n_rx_reorder_pkt
+ (priv, seq_num, tlv_rxba->tid,
+ tlv_rxba->mac, 0, NULL);
+
+ if (ret)
+ nxpwifi_dbg(priv->adapter,
+ ERROR,
+ "Fail to drop packet");
+ }
+ }
+ }
+
+ tlv_buf_left -= (sizeof(tlv_rxba->header) + tlv_len);
+ tmp = (u8 *)tlv_rxba + sizeof(tlv_rxba->header) + tlv_len;
+ tlv_rxba = (struct nxpwifi_ie_types_rxba_sync *)tmp;
+ }
+}
--
2.34.1
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