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 = common->coex_cb; 56 u32 timeout = EVENT_WAIT_FOREVER; 57 58 do { 59 rsi_wait_event(&coex_cb->coex_tx_thread.event, timeout); 60 rsi_reset_event(&coex_cb->coex_tx_thread.event); 61 62 rsi_coex_sched_tx_pkts(coex_cb); 63 } while (atomic_read(&coex_cb->coex_tx_thread.thread_done) == 0); 64 65 kthread_complete_and_exit(&coex_cb->coex_tx_thread.completion, 0); 66 } 67 68 int rsi_coex_recv_pkt(struct rsi_common *common, u8 *msg) 69 { 70 u8 msg_type = msg[RSI_RX_DESC_MSG_TYPE_OFFSET]; 71 72 switch (msg_type) { 73 case COMMON_CARD_READY_IND: 74 rsi_dbg(INFO_ZONE, "common card ready received\n"); 75 common->hibernate_resume = false; 76 rsi_handle_card_ready(common, msg); 77 break; 78 case SLEEP_NOTIFY_IND: 79 rsi_dbg(INFO_ZONE, "sleep notify received\n"); 80 rsi_mgmt_pkt_recv(common, msg); 81 break; 82 } 83 84 return 0; 85 } 86 87 static inline int rsi_map_coex_q(u8 hal_queue) 88 { 89 switch (hal_queue) { 90 case RSI_COEX_Q: 91 return RSI_COEX_Q_COMMON; 92 case RSI_WLAN_Q: 93 return RSI_COEX_Q_WLAN; 94 case RSI_BT_Q: 95 return RSI_COEX_Q_BT; 96 } 97 return RSI_COEX_Q_INVALID; 98 } 99 100 int rsi_coex_send_pkt(void *priv, struct sk_buff *skb, u8 hal_queue) 101 { 102 struct rsi_common *common = priv; 103 struct rsi_coex_ctrl_block *coex_cb = common->coex_cb; 104 struct skb_info *tx_params = NULL; 105 enum rsi_coex_queues coex_q; 106 int status; 107 108 coex_q = rsi_map_coex_q(hal_queue); 109 if (coex_q == RSI_COEX_Q_INVALID) { 110 rsi_dbg(ERR_ZONE, "Invalid coex queue\n"); 111 return -EINVAL; 112 } 113 if (coex_q != RSI_COEX_Q_COMMON && 114 coex_q != RSI_COEX_Q_WLAN) { 115 skb_queue_tail(&coex_cb->coex_tx_qs[coex_q], skb); 116 rsi_set_event(&coex_cb->coex_tx_thread.event); 117 return 0; 118 } 119 if (common->iface_down) { 120 tx_params = 121 (struct skb_info *)&IEEE80211_SKB_CB(skb)->driver_data; 122 123 if (!(tx_params->flags & INTERNAL_MGMT_PKT)) { 124 rsi_indicate_tx_status(common->priv, skb, -EINVAL); 125 return 0; 126 } 127 } 128 129 /* Send packet to hal */ 130 if (skb->priority == MGMT_SOFT_Q) 131 status = rsi_send_mgmt_pkt(common, skb); 132 else 133 status = rsi_send_data_pkt(common, skb); 134 135 return status; 136 } 137 138 int rsi_coex_attach(struct rsi_common *common) 139 { 140 struct rsi_coex_ctrl_block *coex_cb; 141 int cnt; 142 143 coex_cb = kzalloc(sizeof(*coex_cb), GFP_KERNEL); 144 if (!coex_cb) 145 return -ENOMEM; 146 147 common->coex_cb = (void *)coex_cb; 148 coex_cb->priv = common; 149 150 /* Initialize co-ex queues */ 151 for (cnt = 0; cnt < NUM_COEX_TX_QUEUES; cnt++) 152 skb_queue_head_init(&coex_cb->coex_tx_qs[cnt]); 153 rsi_init_event(&coex_cb->coex_tx_thread.event); 154 155 /* Initialize co-ex thread */ 156 if (rsi_create_kthread(common, 157 &coex_cb->coex_tx_thread, 158 rsi_coex_scheduler_thread, 159 "Coex-Tx-Thread")) { 160 rsi_dbg(ERR_ZONE, "%s: Unable to init tx thrd\n", __func__); 161 kfree(coex_cb); 162 return -EINVAL; 163 } 164 return 0; 165 } 166 167 void rsi_coex_detach(struct rsi_common *common) 168 { 169 struct rsi_coex_ctrl_block *coex_cb = common->coex_cb; 170 int cnt; 171 172 rsi_kill_thread(&coex_cb->coex_tx_thread); 173 174 for (cnt = 0; cnt < NUM_COEX_TX_QUEUES; cnt++) 175 skb_queue_purge(&coex_cb->coex_tx_qs[cnt]); 176 177 kfree(coex_cb); 178 } 179