1 /** 2 * Copyright (c) 2018 Redpine Signals Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include "rsi_main.h" 18 #include "rsi_coex.h" 19 #include "rsi_mgmt.h" 20 #include "rsi_hal.h" 21 22 static enum rsi_coex_queues rsi_coex_determine_coex_q 23 (struct rsi_coex_ctrl_block *coex_cb) 24 { 25 enum rsi_coex_queues q_num = RSI_COEX_Q_INVALID; 26 27 if (skb_queue_len(&coex_cb->coex_tx_qs[RSI_COEX_Q_COMMON]) > 0) 28 q_num = RSI_COEX_Q_COMMON; 29 if (skb_queue_len(&coex_cb->coex_tx_qs[RSI_COEX_Q_BT]) > 0) 30 q_num = RSI_COEX_Q_BT; 31 if (skb_queue_len(&coex_cb->coex_tx_qs[RSI_COEX_Q_WLAN]) > 0) 32 q_num = RSI_COEX_Q_WLAN; 33 34 return q_num; 35 } 36 37 static void rsi_coex_sched_tx_pkts(struct rsi_coex_ctrl_block *coex_cb) 38 { 39 enum rsi_coex_queues coex_q = RSI_COEX_Q_INVALID; 40 struct sk_buff *skb; 41 42 do { 43 coex_q = rsi_coex_determine_coex_q(coex_cb); 44 rsi_dbg(INFO_ZONE, "queue = %d\n", coex_q); 45 46 if (coex_q == RSI_COEX_Q_BT) { 47 skb = skb_dequeue(&coex_cb->coex_tx_qs[RSI_COEX_Q_BT]); 48 rsi_send_bt_pkt(coex_cb->priv, skb); 49 } 50 } while (coex_q != RSI_COEX_Q_INVALID); 51 } 52 53 static void rsi_coex_scheduler_thread(struct rsi_common *common) 54 { 55 struct rsi_coex_ctrl_block *coex_cb = 56 (struct rsi_coex_ctrl_block *)common->coex_cb; 57 u32 timeout = EVENT_WAIT_FOREVER; 58 59 do { 60 rsi_wait_event(&coex_cb->coex_tx_thread.event, timeout); 61 rsi_reset_event(&coex_cb->coex_tx_thread.event); 62 63 rsi_coex_sched_tx_pkts(coex_cb); 64 } while (atomic_read(&coex_cb->coex_tx_thread.thread_done) == 0); 65 66 complete_and_exit(&coex_cb->coex_tx_thread.completion, 0); 67 } 68 69 int rsi_coex_recv_pkt(struct rsi_common *common, u8 *msg) 70 { 71 u8 msg_type = msg[RSI_RX_DESC_MSG_TYPE_OFFSET]; 72 73 switch (msg_type) { 74 case COMMON_CARD_READY_IND: 75 rsi_dbg(INFO_ZONE, "common card ready received\n"); 76 common->hibernate_resume = false; 77 rsi_handle_card_ready(common, msg); 78 break; 79 case SLEEP_NOTIFY_IND: 80 rsi_dbg(INFO_ZONE, "sleep notify received\n"); 81 rsi_mgmt_pkt_recv(common, msg); 82 break; 83 } 84 85 return 0; 86 } 87 88 static inline int rsi_map_coex_q(u8 hal_queue) 89 { 90 switch (hal_queue) { 91 case RSI_COEX_Q: 92 return RSI_COEX_Q_COMMON; 93 case RSI_WLAN_Q: 94 return RSI_COEX_Q_WLAN; 95 case RSI_BT_Q: 96 return RSI_COEX_Q_BT; 97 } 98 return RSI_COEX_Q_INVALID; 99 } 100 101 int rsi_coex_send_pkt(void *priv, struct sk_buff *skb, u8 hal_queue) 102 { 103 struct rsi_common *common = (struct rsi_common *)priv; 104 struct rsi_coex_ctrl_block *coex_cb = 105 (struct rsi_coex_ctrl_block *)common->coex_cb; 106 struct skb_info *tx_params = NULL; 107 enum rsi_coex_queues coex_q; 108 int status; 109 110 coex_q = rsi_map_coex_q(hal_queue); 111 if (coex_q == RSI_COEX_Q_INVALID) { 112 rsi_dbg(ERR_ZONE, "Invalid coex queue\n"); 113 return -EINVAL; 114 } 115 if (coex_q != RSI_COEX_Q_COMMON && 116 coex_q != RSI_COEX_Q_WLAN) { 117 skb_queue_tail(&coex_cb->coex_tx_qs[coex_q], skb); 118 rsi_set_event(&coex_cb->coex_tx_thread.event); 119 return 0; 120 } 121 if (common->iface_down) { 122 tx_params = 123 (struct skb_info *)&IEEE80211_SKB_CB(skb)->driver_data; 124 125 if (!(tx_params->flags & INTERNAL_MGMT_PKT)) { 126 rsi_indicate_tx_status(common->priv, skb, -EINVAL); 127 return 0; 128 } 129 } 130 131 /* Send packet to hal */ 132 if (skb->priority == MGMT_SOFT_Q) 133 status = rsi_send_mgmt_pkt(common, skb); 134 else 135 status = rsi_send_data_pkt(common, skb); 136 137 return status; 138 } 139 140 int rsi_coex_attach(struct rsi_common *common) 141 { 142 struct rsi_coex_ctrl_block *coex_cb; 143 int cnt; 144 145 coex_cb = kzalloc(sizeof(*coex_cb), GFP_KERNEL); 146 if (!coex_cb) 147 return -ENOMEM; 148 149 common->coex_cb = (void *)coex_cb; 150 coex_cb->priv = common; 151 152 /* Initialize co-ex queues */ 153 for (cnt = 0; cnt < NUM_COEX_TX_QUEUES; cnt++) 154 skb_queue_head_init(&coex_cb->coex_tx_qs[cnt]); 155 rsi_init_event(&coex_cb->coex_tx_thread.event); 156 157 /* Initialize co-ex thread */ 158 if (rsi_create_kthread(common, 159 &coex_cb->coex_tx_thread, 160 rsi_coex_scheduler_thread, 161 "Coex-Tx-Thread")) { 162 rsi_dbg(ERR_ZONE, "%s: Unable to init tx thrd\n", __func__); 163 return -EINVAL; 164 } 165 return 0; 166 } 167 168 void rsi_coex_detach(struct rsi_common *common) 169 { 170 struct rsi_coex_ctrl_block *coex_cb = 171 (struct rsi_coex_ctrl_block *)common->coex_cb; 172 int cnt; 173 174 rsi_kill_thread(&coex_cb->coex_tx_thread); 175 176 for (cnt = 0; cnt < NUM_COEX_TX_QUEUES; cnt++) 177 skb_queue_purge(&coex_cb->coex_tx_qs[cnt]); 178 179 kfree(coex_cb); 180 } 181