---
drivers/net/wireless/nxp/nxpwifi/wmm.c | 1379 ++++++++++++++++++++++++
1 file changed, 1379 insertions(+)
create mode 100644 drivers/net/wireless/nxp/nxpwifi/wmm.c
diff --git a/drivers/net/wireless/nxp/nxpwifi/wmm.c b/drivers/net/wireless/nxp/nxpwifi/wmm.c
new file mode 100644
index 000000000000..d8ae54458096
--- /dev/null
+++ b/drivers/net/wireless/nxp/nxpwifi/wmm.c
@@ -0,0 +1,1379 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * NXP Wireless LAN device driver: WMM
+ *
+ * Copyright 2011-2024 NXP
+ */
+
+#include "decl.h"
+#include "cfg.h"
+#include "util.h"
+#include "fw.h"
+#include "main.h"
+#include "wmm.h"
+#include "11n.h"
+
+/* Maximum value FW can accept for driver delay in packet transmission */
+#define DRV_PKT_DELAY_TO_FW_MAX 512
+
+#define WMM_QUEUED_PACKET_LOWER_LIMIT 180
+
+#define WMM_QUEUED_PACKET_UPPER_LIMIT 200
+
+/* Offset for TOS field in the IP header */
+#define IPTOS_OFFSET 5
+
+static bool disable_tx_amsdu;
+
+/* This table inverses the tos_to_tid operation to get a priority
+ * which is in sequential order, and can be compared.
+ * Use this to compare the priority of two different TIDs.
+ */
+const u8 tos_to_tid_inv[] = {
+ 0x02, /* from tos_to_tid[2] = 0 */
+ 0x00, /* from tos_to_tid[0] = 1 */
+ 0x01, /* from tos_to_tid[1] = 2 */
+ 0x03,
+ 0x04,
+ 0x05,
+ 0x06,
+ 0x07
+};
+
+/* WMM information IE */
+static const u8 wmm_info_ie[] = { WLAN_EID_VENDOR_SPECIFIC, 0x07,
+ 0x00, 0x50, 0xf2, 0x02,
+ 0x00, 0x01, 0x00
+};
+
+static const u8 wmm_aci_to_qidx_map[] = { WMM_AC_BE,
+ WMM_AC_BK,
+ WMM_AC_VI,
+ WMM_AC_VO
+};
+
+static u8 tos_to_tid[] = {
+ /* TID DSCP_P2 DSCP_P1 DSCP_P0 WMM_AC */
+ 0x01, /* 0 1 0 AC_BK */
+ 0x02, /* 0 0 0 AC_BK */
+ 0x00, /* 0 0 1 AC_BE */
+ 0x03, /* 0 1 1 AC_BE */
+ 0x04, /* 1 0 0 AC_VI */
+ 0x05, /* 1 0 1 AC_VI */
+ 0x06, /* 1 1 0 AC_VO */
+ 0x07 /* 1 1 1 AC_VO */
+};
+
+static u8 ac_to_tid[4][2] = { {1, 2}, {0, 3}, {4, 5}, {6, 7} };
+
+/* This function debug prints the priority parameters for a WMM AC.
+ */
+static void
+nxpwifi_wmm_ac_debug_print(const struct ieee80211_wmm_ac_param *ac_param)
+{
+ static const char * const ac_str[] = { "BK", "BE", "VI", "VO" };
+
+ pr_debug("info: WMM AC_%s: ACI=%d, ACM=%d, Aifsn=%d, ",
+ ac_str[wmm_aci_to_qidx_map[(ac_param->aci_aifsn
+ & NXPWIFI_ACI) >> 5]],
+ (ac_param->aci_aifsn & NXPWIFI_ACI) >> 5,
+ (ac_param->aci_aifsn & NXPWIFI_ACM) >> 4,
+ ac_param->aci_aifsn & NXPWIFI_AIFSN);
+ pr_debug("EcwMin=%d, EcwMax=%d, TxopLimit=%d\n",
+ ac_param->cw & NXPWIFI_ECW_MIN,
+ (ac_param->cw & NXPWIFI_ECW_MAX) >> 4,
+ le16_to_cpu(ac_param->txop_limit));
+}
+
+/* This function allocates a route address list.
+ *
+ * The function also initializes the list with the provided RA.
+ */
+static struct nxpwifi_ra_list_tbl *
+nxpwifi_wmm_allocate_ralist_node(struct nxpwifi_adapter *adapter, const u8 *ra)
+{
+ struct nxpwifi_ra_list_tbl *ra_list;
+
+ ra_list = kzalloc(sizeof(*ra_list), GFP_ATOMIC);
+ if (!ra_list)
+ return NULL;
+
+ INIT_LIST_HEAD(&ra_list->list);
+ skb_queue_head_init(&ra_list->skb_head);
+
+ memcpy(ra_list->ra, ra, ETH_ALEN);
+
+ ra_list->total_pkt_count = 0;
+
+ nxpwifi_dbg(adapter, INFO, "info: allocated ra_list %p\n", ra_list);
+
+ return ra_list;
+}
+
+/* This function returns random no between 16 and 32 to be used as threshold
+ * for no of packets after which BA setup is initiated.
+ */
+static u8 nxpwifi_get_random_ba_threshold(void)
+{
+ u64 ns;
+ /* setup ba_packet_threshold here random number between
+ * [BA_SETUP_PACKET_OFFSET,
+ * BA_SETUP_PACKET_OFFSET+BA_SETUP_MAX_PACKET_THRESHOLD-1]
+ */
+ ns = ktime_get_ns();
+ ns += (ns >> 32) + (ns >> 16);
+
+ return ((u8)ns % BA_SETUP_MAX_PACKET_THRESHOLD) + BA_SETUP_PACKET_OFFSET;
+}
+
+/* This function allocates and adds a RA list for all TIDs
+ * with the given RA.
+ */
+void nxpwifi_ralist_add(struct nxpwifi_private *priv, const u8 *ra)
+{
+ int i;
+ struct nxpwifi_ra_list_tbl *ra_list;
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct nxpwifi_sta_node *node;
+
+ for (i = 0; i < MAX_NUM_TID; ++i) {
+ ra_list = nxpwifi_wmm_allocate_ralist_node(adapter, ra);
+ nxpwifi_dbg(adapter, INFO,
+ "info: created ra_list %p\n", ra_list);
+
+ if (!ra_list)
+ break;
+
+ ra_list->is_11n_enabled = 0;
+ ra_list->ba_status = BA_SETUP_NONE;
+ ra_list->amsdu_in_ampdu = false;
+ if (!nxpwifi_queuing_ra_based(priv)) {
+ ra_list->is_11n_enabled = IS_11N_ENABLED(priv);
+ } else {
+ spin_lock_bh(&priv->sta_list_spinlock);
+ node = nxpwifi_get_sta_entry(priv, ra);
+ if (node)
+ ra_list->tx_paused = node->tx_pause;
+ ra_list->is_11n_enabled =
+ nxpwifi_is_sta_11n_enabled(priv, node);
+ if (ra_list->is_11n_enabled)
+ ra_list->max_amsdu = node->max_amsdu;
+ spin_unlock_bh(&priv->sta_list_spinlock);
+ }
+
+ nxpwifi_dbg(adapter, DATA, "data: ralist %p: is_11n_enabled=%d\n",
+ ra_list, ra_list->is_11n_enabled);
+
+ if (ra_list->is_11n_enabled) {
+ ra_list->ba_pkt_count = 0;
+ ra_list->ba_packet_thr =
+ nxpwifi_get_random_ba_threshold();
+ }
+ list_add_tail(&ra_list->list,
+ &priv->wmm.tid_tbl_ptr[i].ra_list);
+ }
+}
+
+/* This function sets the WMM queue priorities to their default values.
+ */
+static void nxpwifi_wmm_default_queue_priorities(struct nxpwifi_private *priv)
+{
+ /* Default queue priorities: VO->VI->BE->BK */
+ priv->wmm.queue_priority[0] = WMM_AC_VO;
+ priv->wmm.queue_priority[1] = WMM_AC_VI;
+ priv->wmm.queue_priority[2] = WMM_AC_BE;
+ priv->wmm.queue_priority[3] = WMM_AC_BK;
+}
+
+/* This function map ACs to TIDs.
+ */
+static void
+nxpwifi_wmm_queue_priorities_tid(struct nxpwifi_private *priv)
+{
+ struct nxpwifi_wmm_desc *wmm = &priv->wmm;
+ u8 *queue_priority = wmm->queue_priority;
+ int i;
+
+ for (i = 0; i < 4; ++i) {
+ tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1];
+ tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0];
+ }
+
+ for (i = 0; i < MAX_NUM_TID; ++i)
+ priv->tos_to_tid_inv[tos_to_tid[i]] = (u8)i;
+
+ atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID);
+}
+
+/* This function initializes WMM priority queues.
+ */
+void
+nxpwifi_wmm_setup_queue_priorities(struct nxpwifi_private *priv,
+ struct ieee80211_wmm_param_ie *wmm_ie)
+{
+ u16 cw_min, avg_back_off, tmp[4];
+ u32 i, j, num_ac;
+ u8 ac_idx;
+
+ if (!wmm_ie || !priv->wmm_enabled) {
+ /* WMM is not enabled, just set the defaults and return */
+ nxpwifi_wmm_default_queue_priorities(priv);
+ return;
+ }
+
+ nxpwifi_dbg(priv->adapter, INFO,
+ "info: WMM Parameter IE: version=%d,\t"
+ "qos_info Parameter Set Count=%d, Reserved=%#x\n",
+ wmm_ie->version, wmm_ie->qos_info &
+ IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
+ wmm_ie->reserved);
+
+ for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac); num_ac++) {
+ u8 ecw = wmm_ie->ac[num_ac].cw;
+ u8 aci_aifsn = wmm_ie->ac[num_ac].aci_aifsn;
+
+ cw_min = (1 << (ecw & NXPWIFI_ECW_MIN)) - 1;
+ avg_back_off = (cw_min >> 1) + (aci_aifsn & NXPWIFI_AIFSN);
+
+ ac_idx = wmm_aci_to_qidx_map[(aci_aifsn & NXPWIFI_ACI) >> 5];
+ priv->wmm.queue_priority[ac_idx] = ac_idx;
+ tmp[ac_idx] = avg_back_off;
+
+ nxpwifi_dbg(priv->adapter, INFO,
+ "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
+ (1 << ((ecw & NXPWIFI_ECW_MAX) >> 4)) - 1,
+ cw_min, avg_back_off);
+ nxpwifi_wmm_ac_debug_print(&wmm_ie->ac[num_ac]);
+ }
+
+ /* Bubble sort */
+ for (i = 0; i < num_ac; i++) {
+ for (j = 1; j < num_ac - i; j++) {
+ if (tmp[j - 1] > tmp[j]) {
+ swap(tmp[j - 1], tmp[j]);
+ swap(priv->wmm.queue_priority[j - 1],
+ priv->wmm.queue_priority[j]);
+ } else if (tmp[j - 1] == tmp[j]) {
+ if (priv->wmm.queue_priority[j - 1]
+ < priv->wmm.queue_priority[j])
+ swap(priv->wmm.queue_priority[j - 1],
+ priv->wmm.queue_priority[j]);
+ }
+ }
+ }
+
+ nxpwifi_wmm_queue_priorities_tid(priv);
+}
+
+/* This function evaluates whether or not an AC is to be downgraded.
+ *
+ * In case the AC is not enabled, the highest AC is returned that is
+ * enabled and does not require admission control.
+ */
+static enum nxpwifi_wmm_ac_e
+nxpwifi_wmm_eval_downgrade_ac(struct nxpwifi_private *priv,
+ enum nxpwifi_wmm_ac_e eval_ac)
+{
+ int down_ac;
+ enum nxpwifi_wmm_ac_e ret_ac;
+ struct nxpwifi_wmm_ac_status *ac_status;
+
+ ac_status = &priv->wmm.ac_status[eval_ac];
+
+ if (!ac_status->disabled)
+ /* Okay to use this AC, its enabled */
+ return eval_ac;
+
+ /* Setup a default return value of the lowest priority */
+ ret_ac = WMM_AC_BK;
+
+ /* Find the highest AC that is enabled and does not require
+ * admission control. The spec disallows downgrading to an AC,
+ * which is enabled due to a completed admission control.
+ * Unadmitted traffic is not to be sent on an AC with admitted
+ * traffic.
+ */
+ for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
+ ac_status = &priv->wmm.ac_status[down_ac];
+
+ if (!ac_status->disabled && !ac_status->flow_required)
+ /* AC is enabled and does not require admission
+ * control
+ */
+ ret_ac = (enum nxpwifi_wmm_ac_e)down_ac;
+ }
+
+ return ret_ac;
+}
+
+/* This function downgrades WMM priority queue.
+ */
+void
+nxpwifi_wmm_setup_ac_downgrade(struct nxpwifi_private *priv)
+{
+ int ac_val;
+
+ nxpwifi_dbg(priv->adapter, INFO, "info: WMM: AC Priorities:\t"
+ "BK(0), BE(1), VI(2), VO(3)\n");
+
+ if (!priv->wmm_enabled) {
+ /* WMM is not enabled, default priorities */
+ for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
+ priv->wmm.ac_down_graded_vals[ac_val] =
+ (enum nxpwifi_wmm_ac_e)ac_val;
+ } else {
+ for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
+ priv->wmm.ac_down_graded_vals[ac_val] =
+ nxpwifi_wmm_eval_downgrade_ac
+ (priv, (enum nxpwifi_wmm_ac_e)ac_val);
+ nxpwifi_dbg(priv->adapter, INFO,
+ "info: WMM: AC PRIO %d maps to %d\n",
+ ac_val,
+ priv->wmm.ac_down_graded_vals[ac_val]);
+ }
+ }
+}
+
+/* This function converts the IP TOS field to an WMM AC
+ * Queue assignment.
+ */
+static enum nxpwifi_wmm_ac_e
+nxpwifi_wmm_convert_tos_to_ac(struct nxpwifi_adapter *adapter, u32 tos)
+{
+ /* Map of TOS UP values to WMM AC */
+ static const enum nxpwifi_wmm_ac_e tos_to_ac[] = {
+ WMM_AC_BE,
+ WMM_AC_BK,
+ WMM_AC_BK,
+ WMM_AC_BE,
+ WMM_AC_VI,
+ WMM_AC_VI,
+ WMM_AC_VO,
+ WMM_AC_VO
+ };
+
+ if (tos >= ARRAY_SIZE(tos_to_ac))
+ return WMM_AC_BE;
+
+ return tos_to_ac[tos];
+}
+
+/* This function evaluates a given TID and downgrades it to a lower
+ * TID if the WMM Parameter IE received from the AP indicates that the
+ * AP is disabled (due to call admission control (ACM bit). Mapping
+ * of TID to AC is taken care of internally.
+ */
+u8 nxpwifi_wmm_downgrade_tid(struct nxpwifi_private *priv, u32 tid)
+{
+ enum nxpwifi_wmm_ac_e ac, ac_down;
+ u8 new_tid;
+
+ ac = nxpwifi_wmm_convert_tos_to_ac(priv->adapter, tid);
+ ac_down = priv->wmm.ac_down_graded_vals[ac];
+
+ /* Send the index to tid array, picking from the array will be
+ * taken care by dequeuing function
+ */
+ new_tid = ac_to_tid[ac_down][tid % 2];
+
+ return new_tid;
+}
+
+/* This function initializes the WMM state information and the
+ * WMM data path queues.
+ */
+void
+nxpwifi_wmm_init(struct nxpwifi_adapter *adapter)
+{
+ int i, j;
+ struct nxpwifi_private *priv;
+
+ for (j = 0; j < adapter->priv_num; ++j) {
+ priv = adapter->priv[j];
+ if (!priv)
+ continue;
+
+ for (i = 0; i < MAX_NUM_TID; ++i) {
+ if (!disable_tx_amsdu &&
+ adapter->tx_buf_size > NXPWIFI_TX_DATA_BUF_SIZE_2K)
+ priv->aggr_prio_tbl[i].amsdu =
+ priv->tos_to_tid_inv[i];
+ else
+ priv->aggr_prio_tbl[i].amsdu =
+ BA_STREAM_NOT_ALLOWED;
+ priv->aggr_prio_tbl[i].ampdu_ap =
+ priv->tos_to_tid_inv[i];
+ priv->aggr_prio_tbl[i].ampdu_user =
+ priv->tos_to_tid_inv[i];
+ }
+
+ priv->aggr_prio_tbl[6].amsdu =
+ priv->aggr_prio_tbl[6].ampdu_ap =
+ priv->aggr_prio_tbl[6].ampdu_user =
+ BA_STREAM_NOT_ALLOWED;
+
+ priv->aggr_prio_tbl[7].amsdu =
+ priv->aggr_prio_tbl[7].ampdu_ap =
+ priv->aggr_prio_tbl[7].ampdu_user =
+ BA_STREAM_NOT_ALLOWED;
+
+ nxpwifi_set_ba_params(priv);
+ nxpwifi_reset_11n_rx_seq_num(priv);
+
+ priv->wmm.drv_pkt_delay_max = NXPWIFI_WMM_DRV_DELAY_MAX;
+ atomic_set(&priv->wmm.tx_pkts_queued, 0);
+ atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
+ }
+}
+
+bool nxpwifi_bypass_txlist_empty(struct nxpwifi_adapter *adapter)
+{
+ struct nxpwifi_private *priv;
+ int i;
+
+ for (i = 0; i < adapter->priv_num; i++) {
+ priv = adapter->priv[i];
+ if (!priv)
+ continue;
+ if (!skb_queue_empty(&priv->bypass_txq))
+ return false;
+ }
+
+ return true;
+}
+
+/* This function checks if WMM Tx queue is empty.
+ */
+bool nxpwifi_wmm_lists_empty(struct nxpwifi_adapter *adapter)
+{
+ int i;
+ struct nxpwifi_private *priv;
+
+ for (i = 0; i < adapter->priv_num; ++i) {
+ priv = adapter->priv[i];
+ if (!priv)
+ continue;
+ if (!priv->port_open)
+ continue;
+ if (atomic_read(&priv->wmm.tx_pkts_queued))
+ return false;
+ }
+
+ return true;
+}
+
+/* This function deletes all packets in an RA list node.
+ *
+ * The packet sent completion callback handler are called with
+ * status failure, after they are dequeued to ensure proper
+ * cleanup. The RA list node itself is freed at the end.
+ */
+static void
+nxpwifi_wmm_del_pkts_in_ralist_node(struct nxpwifi_private *priv,
+ struct nxpwifi_ra_list_tbl *ra_list)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct sk_buff *skb, *tmp;
+
+ skb_queue_walk_safe(&ra_list->skb_head, skb, tmp) {
+ skb_unlink(skb, &ra_list->skb_head);
+ nxpwifi_write_data_complete(adapter, skb, 0, -1);
+ }
+}
+
+/* This function deletes all packets in an RA list.
+ *
+ * Each nodes in the RA list are freed individually first, and then
+ * the RA list itself is freed.
+ */
+static void
+nxpwifi_wmm_del_pkts_in_ralist(struct nxpwifi_private *priv,
+ struct list_head *ra_list_head)
+{
+ struct nxpwifi_ra_list_tbl *ra_list;
+
+ list_for_each_entry(ra_list, ra_list_head, list)
+ nxpwifi_wmm_del_pkts_in_ralist_node(priv, ra_list);
+}
+
+/* This function deletes all packets in all RA lists.
+ */
+static void nxpwifi_wmm_cleanup_queues(struct nxpwifi_private *priv)
+{
+ int i;
+
+ for (i = 0; i < MAX_NUM_TID; i++)
+ nxpwifi_wmm_del_pkts_in_ralist
+ (priv, &priv->wmm.tid_tbl_ptr[i].ra_list);
+
+ atomic_set(&priv->wmm.tx_pkts_queued, 0);
+ atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
+}
+
+/* This function deletes all route addresses from all RA lists.
+ */
+static void nxpwifi_wmm_delete_all_ralist(struct nxpwifi_private *priv)
+{
+ struct nxpwifi_ra_list_tbl *ra_list, *tmp_node;
+ int i;
+
+ for (i = 0; i < MAX_NUM_TID; ++i) {
+ nxpwifi_dbg(priv->adapter, INFO,
+ "info: ra_list: freeing buf for tid %d\n", i);
+ list_for_each_entry_safe(ra_list, tmp_node,
+ &priv->wmm.tid_tbl_ptr[i].ra_list,
+ list) {
+ list_del(&ra_list->list);
+ kfree(ra_list);
+ }
+
+ INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
+ }
+}
+
+static int nxpwifi_free_ack_frame(int id, void *p, void *data)
+{
+ pr_warn("Have pending ack frames!\n");
+ kfree_skb(p);
+ return 0;
+}
+
+/* This function cleans up the Tx and Rx queues.
+ *
+ * Cleanup includes -
+ * - All packets in RA lists
+ * - All entries in Rx reorder table
+ * - All entries in Tx BA stream table
+ * - MPA buffer (if required)
+ * - All RA lists
+ */
+void
+nxpwifi_clean_txrx(struct nxpwifi_private *priv)
+{
+ struct sk_buff *skb, *tmp;
+
+ nxpwifi_11n_cleanup_reorder_tbl(priv);
+ spin_lock_bh(&priv->wmm.ra_list_spinlock);
+
+ nxpwifi_wmm_cleanup_queues(priv);
+ nxpwifi_11n_delete_all_tx_ba_stream_tbl(priv);
+
+ if (priv->adapter->if_ops.cleanup_mpa_buf)
+ priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
+
+ nxpwifi_wmm_delete_all_ralist(priv);
+ memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
+
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+
+ skb_queue_walk_safe(&priv->bypass_txq, skb, tmp) {
+ skb_unlink(skb, &priv->bypass_txq);
+ nxpwifi_write_data_complete(priv->adapter, skb, 0, -1);
+ }
+ atomic_set(&priv->adapter->bypass_tx_pending, 0);
+
+ idr_for_each(&priv->ack_status_frames, nxpwifi_free_ack_frame, NULL);
+ idr_destroy(&priv->ack_status_frames);
+}
+
+/* This function retrieves a particular RA list node, matching with the
+ * given TID and RA address.
+ */
+struct nxpwifi_ra_list_tbl *
+nxpwifi_wmm_get_ralist_node(struct nxpwifi_private *priv, u8 tid,
+ const u8 *ra_addr)
+{
+ struct nxpwifi_ra_list_tbl *ra_list;
+
+ list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
+ list) {
+ if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
+ return ra_list;
+ }
+
+ return NULL;
+}
+
+void nxpwifi_update_ralist_tx_pause(struct nxpwifi_private *priv, u8 *mac,
+ u8 tx_pause)
+{
+ struct nxpwifi_ra_list_tbl *ra_list;
+ u32 pkt_cnt = 0, tx_pkts_queued;
+ int i;
+
+ spin_lock_bh(&priv->wmm.ra_list_spinlock);
+
+ for (i = 0; i < MAX_NUM_TID; ++i) {
+ ra_list = nxpwifi_wmm_get_ralist_node(priv, i, mac);
+ if (ra_list && ra_list->tx_paused != tx_pause) {
+ pkt_cnt += ra_list->total_pkt_count;
+ ra_list->tx_paused = tx_pause;
+ if (tx_pause)
+ priv->wmm.pkts_paused[i] +=
+ ra_list->total_pkt_count;
+ else
+ priv->wmm.pkts_paused[i] -=
+ ra_list->total_pkt_count;
+ }
+ }
+
+ if (pkt_cnt) {
+ tx_pkts_queued = atomic_read(&priv->wmm.tx_pkts_queued);
+ if (tx_pause)
+ tx_pkts_queued -= pkt_cnt;
+ else
+ tx_pkts_queued += pkt_cnt;
+
+ atomic_set(&priv->wmm.tx_pkts_queued, tx_pkts_queued);
+ atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
+ }
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+}
+
+/* This function retrieves an RA list node for a given TID and
+ * RA address pair.
+ *
+ * If no such node is found, a new node is added first and then
+ * retrieved.
+ */
+struct nxpwifi_ra_list_tbl *
+nxpwifi_wmm_get_queue_raptr(struct nxpwifi_private *priv, u8 tid,
+ const u8 *ra_addr)
+{
+ struct nxpwifi_ra_list_tbl *ra_list;
+
+ ra_list = nxpwifi_wmm_get_ralist_node(priv, tid, ra_addr);
+ if (ra_list)
+ return ra_list;
+ nxpwifi_ralist_add(priv, ra_addr);
+
+ return nxpwifi_wmm_get_ralist_node(priv, tid, ra_addr);
+}
+
+/* This function deletes RA list nodes for given mac for all TIDs.
+ * Function also decrements TX pending count accordingly.
+ */
+void
+nxpwifi_wmm_del_peer_ra_list(struct nxpwifi_private *priv, const u8 *ra_addr)
+{
+ struct nxpwifi_ra_list_tbl *ra_list;
+ int i;
+
+ spin_lock_bh(&priv->wmm.ra_list_spinlock);
+
+ for (i = 0; i < MAX_NUM_TID; ++i) {
+ ra_list = nxpwifi_wmm_get_ralist_node(priv, i, ra_addr);
+
+ if (!ra_list)
+ continue;
+ nxpwifi_wmm_del_pkts_in_ralist_node(priv, ra_list);
+ if (ra_list->tx_paused)
+ priv->wmm.pkts_paused[i] -= ra_list->total_pkt_count;
+ else
+ atomic_sub(ra_list->total_pkt_count,
+ &priv->wmm.tx_pkts_queued);
+ list_del(&ra_list->list);
+ kfree(ra_list);
+ }
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+}
+
+/* This function checks if a particular RA list node exists in a given TID
+ * table index.
+ */
+bool nxpwifi_is_ralist_valid(struct nxpwifi_private *priv,
+ struct nxpwifi_ra_list_tbl *ra_list, int ptr_index)
+{
+ struct nxpwifi_ra_list_tbl *rlist;
+
+ list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
+ list) {
+ if (rlist == ra_list)
+ return true;
+ }
+
+ return false;
+}
+
+/* This function adds a packet to bypass TX queue.
+ * This is special TX queue for packets which can be sent even when port_open
+ * is false.
+ */
+void
+nxpwifi_wmm_add_buf_bypass_txqueue(struct nxpwifi_private *priv,
+ struct sk_buff *skb)
+{
+ skb_queue_tail(&priv->bypass_txq, skb);
+}
+
+/* This function adds a packet to WMM queue.
+ *
+ * In disconnected state the packet is immediately dropped and the
+ * packet send completion callback is called with status failure.
+ *
+ * Otherwise, the correct RA list node is located and the packet
+ * is queued at the list tail.
+ */
+void
+nxpwifi_wmm_add_buf_txqueue(struct nxpwifi_private *priv,
+ struct sk_buff *skb)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ u32 tid;
+ struct nxpwifi_ra_list_tbl *ra_list;
+ u8 ra[ETH_ALEN], tid_down;
+ struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
+
+ memcpy(ra, eth_hdr->h_dest, ETH_ALEN);
+
+ if (!priv->media_connected && !nxpwifi_is_skb_mgmt_frame(skb)) {
+ nxpwifi_dbg(adapter, DATA, "data: drop packet in disconnect\n");
+ nxpwifi_write_data_complete(adapter, skb, 0, -1);
+ return;
+ }
+
+ tid = skb->priority;
+
+ spin_lock_bh(&priv->wmm.ra_list_spinlock);
+
+ tid_down = nxpwifi_wmm_downgrade_tid(priv, tid);
+
+ /* In case of infra as we have already created the list during
+ * association we just don't have to call get_queue_raptr, we will
+ * have only 1 raptr for a tid in case of infra
+ */
+ memcpy(ra, skb->data, ETH_ALEN);
+ if (is_multicast_ether_addr(ra) || nxpwifi_is_skb_mgmt_frame(skb))
+ eth_broadcast_addr(ra);
+ ra_list = nxpwifi_wmm_get_queue_raptr(priv, tid_down, ra);
+
+ if (!ra_list) {
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+ nxpwifi_write_data_complete(adapter, skb, 0, -1);
+ return;
+ }
+
+ skb_queue_tail(&ra_list->skb_head, skb);
+
+ ra_list->ba_pkt_count++;
+ ra_list->total_pkt_count++;
+
+ if (atomic_read(&priv->wmm.highest_queued_prio) <
+ priv->tos_to_tid_inv[tid_down])
+ atomic_set(&priv->wmm.highest_queued_prio,
+ priv->tos_to_tid_inv[tid_down]);
+
+ if (ra_list->tx_paused)
+ priv->wmm.pkts_paused[tid_down]++;
+ else
+ atomic_inc(&priv->wmm.tx_pkts_queued);
+
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+}
+
+/* This function processes the get WMM status command response from firmware.
+ *
+ * The response may contain multiple TLVs -
+ * - AC Queue status TLVs
+ * - Current WMM Parameter IE TLV
+ * - Admission Control action frame TLVs
+ *
+ * This function parses the TLVs and then calls further specific functions
+ * to process any changes in the queue prioritize or state.
+ */
+int nxpwifi_ret_wmm_get_status(struct nxpwifi_private *priv,
+ const struct host_cmd_ds_command *resp)
+{
+ u8 *curr = (u8 *)&resp->params.get_wmm_status;
+ u16 resp_len = le16_to_cpu(resp->size), tlv_len;
+ int mask = IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK;
+ bool valid = true;
+
+ struct nxpwifi_ie_types_data *tlv_hdr;
+ struct nxpwifi_ie_types_wmm_queue_status *wmm_qs;
+ struct ieee80211_wmm_param_ie *wmm_param_ie = NULL;
+ struct nxpwifi_wmm_ac_status *ac_status;
+
+ nxpwifi_dbg(priv->adapter, INFO,
+ "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
+ resp_len);
+
+ while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
+ tlv_hdr = (struct nxpwifi_ie_types_data *)curr;
+ tlv_len = le16_to_cpu(tlv_hdr->header.len);
+
+ if (resp_len < tlv_len + sizeof(tlv_hdr->header))
+ break;
+
+ switch (le16_to_cpu(tlv_hdr->header.type)) {
+ case TLV_TYPE_WMMQSTATUS:
+ wmm_qs = (struct nxpwifi_ie_types_wmm_queue_status *)
+ tlv_hdr;
+ nxpwifi_dbg(priv->adapter, CMD,
+ "info: CMD_RESP: WMM_GET_STATUS:\t"
+ "QSTATUS TLV: %d, %d, %d\n",
+ wmm_qs->queue_index,
+ wmm_qs->flow_required,
+ wmm_qs->disabled);
+
+ ac_status = &priv->wmm.ac_status[wmm_qs->queue_index];
+ ac_status->disabled = wmm_qs->disabled;
+ ac_status->flow_required = wmm_qs->flow_required;
+ ac_status->flow_created = wmm_qs->flow_created;
+ break;
+
+ case WLAN_EID_VENDOR_SPECIFIC:
+ /* Point the regular IEEE IE 2 bytes into the NXP IE
+ * and setup the IEEE IE type and length byte fields
+ */
+
+ wmm_param_ie =
+ (struct ieee80211_wmm_param_ie *)(curr + 2);
+ wmm_param_ie->len = (u8)tlv_len;
+ wmm_param_ie->element_id = WLAN_EID_VENDOR_SPECIFIC;
+
+ nxpwifi_dbg(priv->adapter, CMD,
+ "info: CMD_RESP: WMM_GET_STATUS:\t"
+ "WMM Parameter Set Count: %d\n",
+ wmm_param_ie->qos_info & mask);
+
+ if (wmm_param_ie->len + 2 >
+ sizeof(struct ieee80211_wmm_param_ie))
+ break;
+
+ memcpy(&priv->curr_bss_params.bss_descriptor.wmm_ie,
+ wmm_param_ie, wmm_param_ie->len + 2);
+
+ break;
+
+ default:
+ valid = false;
+ break;
+ }
+
+ curr += (tlv_len + sizeof(tlv_hdr->header));
+ resp_len -= (tlv_len + sizeof(tlv_hdr->header));
+ }
+
+ nxpwifi_wmm_setup_queue_priorities(priv, wmm_param_ie);
+ nxpwifi_wmm_setup_ac_downgrade(priv);
+
+ return 0;
+}
+
+/* Callback handler from the command module to allow insertion of a WMM TLV.
+ *
+ * If the BSS we are associating to supports WMM, this function adds the
+ * required WMM Information IE to the association request command buffer in
+ * the form of a NXP extended IEEE IE.
+ */
+u32
+nxpwifi_wmm_process_association_req(struct nxpwifi_private *priv,
+ u8 **assoc_buf,
+ struct ieee80211_wmm_param_ie *wmm_ie,
+ struct ieee80211_ht_cap *ht_cap)
+{
+ struct nxpwifi_ie_types_wmm_param_set *wmm_tlv;
+ u32 ret_len = 0;
+
+ /* Null checks */
+ if (!assoc_buf)
+ return 0;
+ if (!(*assoc_buf))
+ return 0;
+
+ if (!wmm_ie)
+ return 0;
+
+ nxpwifi_dbg(priv->adapter, INFO,
+ "info: WMM: process assoc req: bss->wmm_ie=%#x\n",
+ wmm_ie->element_id);
+
+ if ((priv->wmm_required ||
+ (ht_cap && (priv->adapter->config_bands & BAND_GN ||
+ priv->adapter->config_bands & BAND_AN))) &&
+ wmm_ie->element_id == WLAN_EID_VENDOR_SPECIFIC) {
+ wmm_tlv = (struct nxpwifi_ie_types_wmm_param_set *)*assoc_buf;
+ wmm_tlv->header.type = cpu_to_le16((u16)wmm_info_ie[0]);
+ wmm_tlv->header.len = cpu_to_le16((u16)wmm_info_ie[1]);
+ memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
+ le16_to_cpu(wmm_tlv->header.len));
+ if (wmm_ie->qos_info & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
+ memcpy((u8 *)(wmm_tlv->wmm_ie
+ + le16_to_cpu(wmm_tlv->header.len)
+ - sizeof(priv->wmm_qosinfo)),
+ &priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo));
+
+ ret_len = sizeof(wmm_tlv->header)
+ + le16_to_cpu(wmm_tlv->header.len);
+
+ *assoc_buf += ret_len;
+ }
+
+ return ret_len;
+}
+
+/* This function computes the time delay in the driver queues for a
+ * given packet.
+ *
+ * When the packet is received at the OS/Driver interface, the current
+ * time is set in the packet structure. The difference between the present
+ * time and that received time is computed in this function and limited
+ * based on pre-compiled limits in the driver.
+ */
+u8
+nxpwifi_wmm_compute_drv_pkt_delay(struct nxpwifi_private *priv,
+ const struct sk_buff *skb)
+{
+ u32 queue_delay = ktime_to_ms(net_timedelta(skb->tstamp));
+ u8 ret_val;
+
+ /* Queue delay is passed as a uint8 in units of 2ms (ms shifted
+ * by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
+ *
+ * Pass max value if queue_delay is beyond the uint8 range
+ */
+ ret_val = (u8)(min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
+
+ nxpwifi_dbg(priv->adapter, DATA, "data: WMM: Pkt Delay: %d ms,\t"
+ "%d ms sent to FW\n", queue_delay, ret_val);
+
+ return ret_val;
+}
+
+/* This function retrieves the highest priority RA list table pointer.
+ */
+static struct nxpwifi_ra_list_tbl *
+nxpwifi_wmm_get_highest_priolist_ptr(struct nxpwifi_adapter *adapter,
+ struct nxpwifi_private **priv, int *tid)
+{
+ struct nxpwifi_private *priv_tmp;
+ struct nxpwifi_ra_list_tbl *ptr;
+ struct nxpwifi_tid_tbl *tid_ptr;
+ atomic_t *hqp;
+ int i, j;
+ u8 to_tid;
+
+ /* check the BSS with highest priority first */
+ for (j = adapter->priv_num - 1; j >= 0; --j) {
+ /* iterate over BSS with the equal priority */
+ list_for_each_entry(adapter->bss_prio_tbl[j].bss_prio_cur,
+ &adapter->bss_prio_tbl[j].bss_prio_head,
+ list) {
+try_again:
+ priv_tmp = adapter->bss_prio_tbl[j].bss_prio_cur->priv;
+
+ if (!priv_tmp->port_open ||
+ (atomic_read(&priv_tmp->wmm.tx_pkts_queued) == 0))
+ continue;
+
+ /* iterate over the WMM queues of the BSS */
+ hqp = &priv_tmp->wmm.highest_queued_prio;
+ for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) {
+ spin_lock_bh(&priv_tmp->wmm.ra_list_spinlock);
+
+ to_tid = tos_to_tid[i];
+ tid_ptr = &(priv_tmp)->wmm.tid_tbl_ptr[to_tid];
+
+ /* iterate over receiver addresses */
+ list_for_each_entry(ptr, &tid_ptr->ra_list,
+ list) {
+ if (!ptr->tx_paused &&
+ !skb_queue_empty(&ptr->skb_head))
+ /* holds both locks */
+ goto found;
+ }
+
+ spin_unlock_bh(&priv_tmp->wmm.ra_list_spinlock);
+ }
+
+ if (atomic_read(&priv_tmp->wmm.tx_pkts_queued) != 0) {
+ atomic_set(&priv_tmp->wmm.highest_queued_prio,
+ HIGH_PRIO_TID);
+ /* Iterate current private once more, since
+ * there still exist packets in data queue
+ */
+ goto try_again;
+ } else {
+ atomic_set(&priv_tmp->wmm.highest_queued_prio,
+ NO_PKT_PRIO_TID);
+ }
+ }
+ }
+
+ return NULL;
+
+found:
+ /* holds ra_list_spinlock */
+ if (atomic_read(hqp) > i)
+ atomic_set(hqp, i);
+ spin_unlock_bh(&priv_tmp->wmm.ra_list_spinlock);
+
+ *priv = priv_tmp;
+ *tid = tos_to_tid[i];
+
+ return ptr;
+}
+
+/* This functions rotates ra and bss lists so packets are picked round robin.
+ *
+ * After a packet is successfully transmitted, rotate the ra list, so the ra
+ * next to the one transmitted, will come first in the list. This way we pick
+ * the ra' in a round robin fashion. Same applies to bss nodes of equal
+ * priority.
+ *
+ * Function also increments wmm.packets_out counter.
+ */
+void nxpwifi_rotate_priolists(struct nxpwifi_private *priv,
+ struct nxpwifi_ra_list_tbl *ra,
+ int tid)
+{
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct nxpwifi_bss_prio_tbl *tbl = adapter->bss_prio_tbl;
+ struct nxpwifi_tid_tbl *tid_ptr = &priv->wmm.tid_tbl_ptr[tid];
+
+ spin_lock_bh(&tbl[priv->bss_priority].bss_prio_lock);
+ /* dirty trick: we remove 'head' temporarily and reinsert it after
+ * curr bss node. imagine list to stay fixed while head is moved
+ */
+ list_move(&tbl[priv->bss_priority].bss_prio_head,
+ &tbl[priv->bss_priority].bss_prio_cur->list);
+ spin_unlock_bh(&tbl[priv->bss_priority].bss_prio_lock);
+
+ spin_lock_bh(&priv->wmm.ra_list_spinlock);
+ if (nxpwifi_is_ralist_valid(priv, ra, tid)) {
+ priv->wmm.packets_out[tid]++;
+ /* same as above */
+ list_move(&tid_ptr->ra_list, &ra->list);
+ }
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+}
+
+/* This function checks if 11n aggregation is possible.
+ */
+static bool
+nxpwifi_is_11n_aggragation_possible(struct nxpwifi_private *priv,
+ struct nxpwifi_ra_list_tbl *ptr,
+ int max_buf_size)
+{
+ int count = 0, total_size = 0;
+ struct sk_buff *skb, *tmp;
+ int max_amsdu_size;
+
+ if (priv->bss_role == NXPWIFI_BSS_ROLE_UAP && priv->ap_11n_enabled &&
+ ptr->is_11n_enabled)
+ max_amsdu_size = min_t(int, ptr->max_amsdu, max_buf_size);
+ else
+ max_amsdu_size = max_buf_size;
+
+ skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
+ total_size += skb->len;
+ if (total_size >= max_amsdu_size)
+ break;
+ if (++count >= MIN_NUM_AMSDU)
+ return true;
+ }
+
+ return false;
+}
+
+/* This function sends a single packet to firmware for transmission.
+ */
+static void
+nxpwifi_send_single_packet(struct nxpwifi_private *priv,
+ struct nxpwifi_ra_list_tbl *ptr, int ptr_index)
+__releases(&priv->wmm.ra_list_spinlock)
+{
+ struct sk_buff *skb, *skb_next;
+ struct nxpwifi_tx_param tx_param;
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ struct nxpwifi_txinfo *tx_info;
+
+ if (skb_queue_empty(&ptr->skb_head)) {
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+ nxpwifi_dbg(adapter, DATA, "data: nothing to send\n");
+ return;
+ }
+
+ skb = skb_dequeue(&ptr->skb_head);
+
+ tx_info = NXPWIFI_SKB_TXCB(skb);
+ nxpwifi_dbg(adapter, DATA,
+ "data: dequeuing the packet %p %p\n", ptr, skb);
+
+ ptr->total_pkt_count--;
+
+ if (!skb_queue_empty(&ptr->skb_head))
+ skb_next = skb_peek(&ptr->skb_head);
+ else
+ skb_next = NULL;
+
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+
+ tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
+ sizeof(struct txpd) : 0);
+
+ if (nxpwifi_process_tx(priv, skb, &tx_param) == -EBUSY) {
+ /* Queue the packet back at the head */
+ spin_lock_bh(&priv->wmm.ra_list_spinlock);
+
+ if (!nxpwifi_is_ralist_valid(priv, ptr, ptr_index)) {
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+ nxpwifi_write_data_complete(adapter, skb, 0, -1);
+ return;
+ }
+
+ skb_queue_tail(&ptr->skb_head, skb);
+
+ ptr->total_pkt_count++;
+ ptr->ba_pkt_count++;
+ tx_info->flags |= NXPWIFI_BUF_FLAG_REQUEUED_PKT;
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+ } else {
+ nxpwifi_rotate_priolists(priv, ptr, ptr_index);
+ atomic_dec(&priv->wmm.tx_pkts_queued);
+ }
+}
+
+/* This function checks if the first packet in the given RA list
+ * is already processed or not.
+ */
+static bool
+nxpwifi_is_ptr_processed(struct nxpwifi_private *priv,
+ struct nxpwifi_ra_list_tbl *ptr)
+{
+ struct sk_buff *skb;
+ struct nxpwifi_txinfo *tx_info;
+
+ if (skb_queue_empty(&ptr->skb_head))
+ return false;
+
+ skb = skb_peek(&ptr->skb_head);
+
+ tx_info = NXPWIFI_SKB_TXCB(skb);
+ if (tx_info->flags & NXPWIFI_BUF_FLAG_REQUEUED_PKT)
+ return true;
+
+ return false;
+}
+
+/* This function sends a single processed packet to firmware for
+ * transmission.
+ */
+static void
+nxpwifi_send_processed_packet(struct nxpwifi_private *priv,
+ struct nxpwifi_ra_list_tbl *ptr, int ptr_index)
+ __releases(&priv->wmm.ra_list_spinlock)
+{
+ struct nxpwifi_tx_param tx_param;
+ struct nxpwifi_adapter *adapter = priv->adapter;
+ int ret;
+ struct sk_buff *skb, *skb_next;
+ struct nxpwifi_txinfo *tx_info;
+
+ if (skb_queue_empty(&ptr->skb_head)) {
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+ return;
+ }
+
+ skb = skb_dequeue(&ptr->skb_head);
+
+ if (adapter->data_sent || adapter->tx_lock_flag) {
+ ptr->total_pkt_count--;
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+ skb_queue_tail(&adapter->tx_data_q, skb);
+ atomic_dec(&priv->wmm.tx_pkts_queued);
+ atomic_inc(&adapter->tx_queued);
+ return;
+ }
+
+ if (!skb_queue_empty(&ptr->skb_head))
+ skb_next = skb_peek(&ptr->skb_head);
+ else
+ skb_next = NULL;
+
+ tx_info = NXPWIFI_SKB_TXCB(skb);
+
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+
+ tx_param.next_pkt_len =
+ ((skb_next) ? skb_next->len +
+ sizeof(struct txpd) : 0);
+
+ ret = adapter->if_ops.host_to_card(adapter, NXPWIFI_TYPE_DATA,
+ skb, &tx_param);
+
+ switch (ret) {
+ case -EBUSY:
+ nxpwifi_dbg(adapter, ERROR, "data: -EBUSY is returned\n");
+ spin_lock_bh(&priv->wmm.ra_list_spinlock);
+
+ if (!nxpwifi_is_ralist_valid(priv, ptr, ptr_index)) {
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+ nxpwifi_write_data_complete(adapter, skb, 0, -1);
+ return;
+ }
+
+ skb_queue_tail(&ptr->skb_head, skb);
+
+ tx_info->flags |= NXPWIFI_BUF_FLAG_REQUEUED_PKT;
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+ break;
+ case -EINPROGRESS:
+ break;
+ case 0:
+ nxpwifi_write_data_complete(adapter, skb, 0, ret);
+ break;
+ default:
+ nxpwifi_dbg(adapter, ERROR, "host_to_card failed: %#x\n", ret);
+ adapter->dbg.num_tx_host_to_card_failure++;
+ nxpwifi_write_data_complete(adapter, skb, 0, ret);
+ break;
+ }
+
+ if (ret != -EBUSY) {
+ nxpwifi_rotate_priolists(priv, ptr, ptr_index);
+ atomic_dec(&priv->wmm.tx_pkts_queued);
+ spin_lock_bh(&priv->wmm.ra_list_spinlock);
+ ptr->total_pkt_count--;
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+ }
+}
+
+/* This function dequeues a packet from the highest priority list
+ * and transmits it.
+ */
+static int
+nxpwifi_dequeue_tx_packet(struct nxpwifi_adapter *adapter)
+{
+ struct nxpwifi_ra_list_tbl *ptr;
+ struct nxpwifi_private *priv = NULL;
+ int ptr_index = 0;
+ u8 ra[ETH_ALEN];
+ int tid_del = 0, tid = 0;
+
+ ptr = nxpwifi_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
+ if (!ptr)
+ return -ENOENT;
+
+ tid = nxpwifi_get_tid(ptr);
+
+ nxpwifi_dbg(adapter, DATA, "data: tid=%d\n", tid);
+
+ spin_lock_bh(&priv->wmm.ra_list_spinlock);
+ if (!nxpwifi_is_ralist_valid(priv, ptr, ptr_index)) {
+ spin_unlock_bh(&priv->wmm.ra_list_spinlock);
+ return -EINVAL;
+ }
+
+ if (nxpwifi_is_ptr_processed(priv, ptr)) {
+ nxpwifi_send_processed_packet(priv, ptr, ptr_index);
+ /* ra_list_spinlock has been freed in
+ * nxpwifi_send_processed_packet()
+ */
+ return 0;
+ }
+
+ if (!ptr->is_11n_enabled ||
+ ptr->ba_status ||
+ priv->wps.session_enable) {
+ if (ptr->is_11n_enabled &&
+ ptr->ba_status &&
+ ptr->amsdu_in_ampdu &&
+ nxpwifi_is_amsdu_allowed(priv, tid) &&
+ nxpwifi_is_11n_aggragation_possible(priv, ptr,
+ adapter->tx_buf_size))
+ nxpwifi_11n_aggregate_pkt(priv, ptr, ptr_index);
+ /* ra_list_spinlock has been freed in
+ * nxpwifi_11n_aggregate_pkt()
+ */
+ else
+ nxpwifi_send_single_packet(priv, ptr, ptr_index);
+ /* ra_list_spinlock has been freed in
+ * nxpwifi_send_single_packet()
+ */
+ } else {
+ if (nxpwifi_is_ampdu_allowed(priv, ptr, tid) &&
+ ptr->ba_pkt_count > ptr->ba_packet_thr) {
+ if (nxpwifi_space_avail_for_new_ba_stream(adapter)) {
+ nxpwifi_create_ba_tbl(priv, ptr->ra, tid,
+ BA_SETUP_INPROGRESS);
+ nxpwifi_send_addba(priv, tid, ptr->ra);
+ } else if (nxpwifi_find_stream_to_delete
+ (priv, tid, &tid_del, ra)) {
+ nxpwifi_create_ba_tbl(priv, ptr->ra, tid,
+ BA_SETUP_INPROGRESS);
+ nxpwifi_send_delba(priv, tid_del, ra, 1);
+ }
+ }
+ if (nxpwifi_is_amsdu_allowed(priv, tid) &&
+ nxpwifi_is_11n_aggragation_possible(priv, ptr,
+ adapter->tx_buf_size))
+ nxpwifi_11n_aggregate_pkt(priv, ptr, ptr_index);
+ /* ra_list_spinlock has been freed in
+ * nxpwifi_11n_aggregate_pkt()
+ */
+ else
+ nxpwifi_send_single_packet(priv, ptr, ptr_index);
+ /* ra_list_spinlock has been freed in
+ * nxpwifi_send_single_packet()
+ */
+ }
+ return 0;
+}
+
+void nxpwifi_process_bypass_tx(struct nxpwifi_adapter *adapter)
+{
+ struct nxpwifi_tx_param tx_param;
+ struct sk_buff *skb;
+ struct nxpwifi_txinfo *tx_info;
+ struct nxpwifi_private *priv;
+ int i;
+
+ if (adapter->data_sent || adapter->tx_lock_flag)
+ return;
+
+ for (i = 0; i < adapter->priv_num; ++i) {
+ priv = adapter->priv[i];
+
+ if (!priv)
+ continue;
+
+ if (skb_queue_empty(&priv->bypass_txq))
+ continue;
+
+ skb = skb_dequeue(&priv->bypass_txq);
+ tx_info = NXPWIFI_SKB_TXCB(skb);
+
+ /* no aggregation for bypass packets */
+ tx_param.next_pkt_len = 0;
+
+ if (nxpwifi_process_tx(priv, skb, &tx_param) == -EBUSY) {
+ skb_queue_head(&priv->bypass_txq, skb);
+ tx_info->flags |= NXPWIFI_BUF_FLAG_REQUEUED_PKT;
+ } else {
+ atomic_dec(&adapter->bypass_tx_pending);
+ }
+ }
+}
+
+/* This function transmits the highest priority packet awaiting in the
+ * WMM Queues.
+ */
+void
+nxpwifi_wmm_process_tx(struct nxpwifi_adapter *adapter)
+{
+ do {
+ if (nxpwifi_dequeue_tx_packet(adapter))
+ break;
+ if (adapter->iface_type != NXPWIFI_SDIO) {
+ if (adapter->data_sent ||
+ adapter->tx_lock_flag)
+ break;
+ } else {
+ if (atomic_read(&adapter->tx_queued) >=
+ NXPWIFI_MAX_PKTS_TXQ)
+ break;
+ }
+ } while (!nxpwifi_wmm_lists_empty(adapter));
+}
--
2.34.1
