1 // SPDX-License-Identifier: GPL-2.0 2 /****************************************************************************** 3 * rtl871x_sta_mgt.c 4 * 5 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved. 6 * Linux device driver for RTL8192SU 7 * 8 * Modifications for inclusion into the Linux staging tree are 9 * Copyright(c) 2010 Larry Finger. All rights reserved. 10 * 11 * Contact information: 12 * WLAN FAE <wlanfae@realtek.com> 13 * Larry Finger <Larry.Finger@lwfinger.net> 14 * 15 ******************************************************************************/ 16 17 #define _RTL871X_STA_MGT_C_ 18 19 #include "osdep_service.h" 20 #include "drv_types.h" 21 #include "recv_osdep.h" 22 #include "xmit_osdep.h" 23 #include "sta_info.h" 24 25 static void _init_stainfo(struct sta_info *psta) 26 { 27 memset((u8 *)psta, 0, sizeof(struct sta_info)); 28 spin_lock_init(&psta->lock); 29 INIT_LIST_HEAD(&psta->list); 30 INIT_LIST_HEAD(&psta->hash_list); 31 _r8712_init_sta_xmit_priv(&psta->sta_xmitpriv); 32 _r8712_init_sta_recv_priv(&psta->sta_recvpriv); 33 INIT_LIST_HEAD(&psta->asoc_list); 34 INIT_LIST_HEAD(&psta->auth_list); 35 } 36 37 int _r8712_init_sta_priv(struct sta_priv *pstapriv) 38 { 39 struct sta_info *psta; 40 s32 i; 41 42 pstapriv->pallocated_stainfo_buf = kmalloc(sizeof(struct sta_info) * 43 NUM_STA + 4, GFP_ATOMIC); 44 if (!pstapriv->pallocated_stainfo_buf) 45 return -ENOMEM; 46 pstapriv->pstainfo_buf = pstapriv->pallocated_stainfo_buf + 4 - 47 ((addr_t)(pstapriv->pallocated_stainfo_buf) & 3); 48 _init_queue(&pstapriv->free_sta_queue); 49 spin_lock_init(&pstapriv->sta_hash_lock); 50 pstapriv->asoc_sta_count = 0; 51 _init_queue(&pstapriv->sleep_q); 52 _init_queue(&pstapriv->wakeup_q); 53 psta = (struct sta_info *)(pstapriv->pstainfo_buf); 54 for (i = 0; i < NUM_STA; i++) { 55 _init_stainfo(psta); 56 INIT_LIST_HEAD(&(pstapriv->sta_hash[i])); 57 list_add_tail(&psta->list, &pstapriv->free_sta_queue.queue); 58 psta++; 59 } 60 INIT_LIST_HEAD(&pstapriv->asoc_list); 61 INIT_LIST_HEAD(&pstapriv->auth_list); 62 return 0; 63 } 64 65 /* this function is used to free the memory of lock || sema for all stainfos */ 66 static void mfree_all_stainfo(struct sta_priv *pstapriv) 67 { 68 unsigned long irqL; 69 struct list_head *plist, *phead; 70 71 spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL); 72 phead = &pstapriv->free_sta_queue.queue; 73 plist = phead->next; 74 while (!end_of_queue_search(phead, plist)) 75 plist = plist->next; 76 77 spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL); 78 } 79 80 void _r8712_free_sta_priv(struct sta_priv *pstapriv) 81 { 82 if (pstapriv) { 83 /* be done before free sta_hash_lock */ 84 mfree_all_stainfo(pstapriv); 85 kfree(pstapriv->pallocated_stainfo_buf); 86 } 87 } 88 89 struct sta_info *r8712_alloc_stainfo(struct sta_priv *pstapriv, u8 *hwaddr) 90 { 91 s32 index; 92 struct list_head *phash_list; 93 struct sta_info *psta; 94 struct __queue *pfree_sta_queue; 95 struct recv_reorder_ctrl *preorder_ctrl; 96 int i = 0; 97 u16 wRxSeqInitialValue = 0xffff; 98 unsigned long flags; 99 100 pfree_sta_queue = &pstapriv->free_sta_queue; 101 spin_lock_irqsave(&pfree_sta_queue->lock, flags); 102 psta = list_first_entry_or_null(&pfree_sta_queue->queue, 103 struct sta_info, list); 104 if (psta) { 105 list_del_init(&psta->list); 106 _init_stainfo(psta); 107 memcpy(psta->hwaddr, hwaddr, ETH_ALEN); 108 index = wifi_mac_hash(hwaddr); 109 if (index >= NUM_STA) { 110 psta = NULL; 111 goto exit; 112 } 113 phash_list = &pstapriv->sta_hash[index]; 114 list_add_tail(&psta->hash_list, phash_list); 115 pstapriv->asoc_sta_count++; 116 117 /* For the SMC router, the sequence number of first packet of WPS handshake 118 * will be 0. In this case, this packet will be dropped by recv_decache function 119 * if we use the 0x00 as the default value for tid_rxseq variable. So, we 120 * initialize the tid_rxseq variable as the 0xffff. 121 */ 122 for (i = 0; i < 16; i++) 123 memcpy(&psta->sta_recvpriv.rxcache.tid_rxseq[i], 124 &wRxSeqInitialValue, 2); 125 /* for A-MPDU Rx reordering buffer control */ 126 for (i = 0; i < 16; i++) { 127 preorder_ctrl = &psta->recvreorder_ctrl[i]; 128 preorder_ctrl->padapter = pstapriv->padapter; 129 preorder_ctrl->indicate_seq = 0xffff; 130 preorder_ctrl->wend_b = 0xffff; 131 preorder_ctrl->wsize_b = 64; 132 _init_queue(&preorder_ctrl->pending_recvframe_queue); 133 r8712_init_recv_timer(preorder_ctrl); 134 } 135 } 136 exit: 137 spin_unlock_irqrestore(&pfree_sta_queue->lock, flags); 138 return psta; 139 } 140 141 /* using pstapriv->sta_hash_lock to protect */ 142 void r8712_free_stainfo(struct _adapter *padapter, struct sta_info *psta) 143 { 144 int i; 145 unsigned long irqL0; 146 struct __queue *pfree_sta_queue; 147 struct recv_reorder_ctrl *preorder_ctrl; 148 struct sta_xmit_priv *pstaxmitpriv; 149 struct xmit_priv *pxmitpriv = &padapter->xmitpriv; 150 struct sta_priv *pstapriv = &padapter->stapriv; 151 152 if (psta == NULL) 153 return; 154 pfree_sta_queue = &pstapriv->free_sta_queue; 155 pstaxmitpriv = &psta->sta_xmitpriv; 156 spin_lock_irqsave(&(pxmitpriv->vo_pending.lock), irqL0); 157 r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vo_q.sta_pending); 158 list_del_init(&(pstaxmitpriv->vo_q.tx_pending)); 159 spin_unlock_irqrestore(&(pxmitpriv->vo_pending.lock), irqL0); 160 spin_lock_irqsave(&(pxmitpriv->vi_pending.lock), irqL0); 161 r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->vi_q.sta_pending); 162 list_del_init(&(pstaxmitpriv->vi_q.tx_pending)); 163 spin_unlock_irqrestore(&(pxmitpriv->vi_pending.lock), irqL0); 164 spin_lock_irqsave(&(pxmitpriv->bk_pending.lock), irqL0); 165 r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->bk_q.sta_pending); 166 list_del_init(&(pstaxmitpriv->bk_q.tx_pending)); 167 spin_unlock_irqrestore(&(pxmitpriv->bk_pending.lock), irqL0); 168 spin_lock_irqsave(&(pxmitpriv->be_pending.lock), irqL0); 169 r8712_free_xmitframe_queue(pxmitpriv, &pstaxmitpriv->be_q.sta_pending); 170 list_del_init(&(pstaxmitpriv->be_q.tx_pending)); 171 spin_unlock_irqrestore(&(pxmitpriv->be_pending.lock), irqL0); 172 list_del_init(&psta->hash_list); 173 pstapriv->asoc_sta_count--; 174 /* re-init sta_info; 20061114 */ 175 _r8712_init_sta_xmit_priv(&psta->sta_xmitpriv); 176 _r8712_init_sta_recv_priv(&psta->sta_recvpriv); 177 /* for A-MPDU Rx reordering buffer control, 178 * cancel reordering_ctrl_timer 179 */ 180 for (i = 0; i < 16; i++) { 181 preorder_ctrl = &psta->recvreorder_ctrl[i]; 182 del_timer(&preorder_ctrl->reordering_ctrl_timer); 183 } 184 spin_lock(&(pfree_sta_queue->lock)); 185 /* insert into free_sta_queue; 20061114 */ 186 list_add_tail(&psta->list, &pfree_sta_queue->queue); 187 spin_unlock(&(pfree_sta_queue->lock)); 188 } 189 190 /* free all stainfo which in sta_hash[all] */ 191 void r8712_free_all_stainfo(struct _adapter *padapter) 192 { 193 unsigned long irqL; 194 struct list_head *plist, *phead; 195 s32 index; 196 struct sta_info *psta = NULL; 197 struct sta_priv *pstapriv = &padapter->stapriv; 198 struct sta_info *pbcmc_stainfo = r8712_get_bcmc_stainfo(padapter); 199 200 if (pstapriv->asoc_sta_count == 1) 201 return; 202 spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL); 203 for (index = 0; index < NUM_STA; index++) { 204 phead = &(pstapriv->sta_hash[index]); 205 plist = phead->next; 206 while (!end_of_queue_search(phead, plist)) { 207 psta = container_of(plist, 208 struct sta_info, hash_list); 209 plist = plist->next; 210 if (pbcmc_stainfo != psta) 211 r8712_free_stainfo(padapter, psta); 212 } 213 } 214 spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL); 215 } 216 217 /* any station allocated can be searched by hash list */ 218 struct sta_info *r8712_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr) 219 { 220 unsigned long irqL; 221 struct list_head *plist, *phead; 222 struct sta_info *psta = NULL; 223 u32 index; 224 225 if (hwaddr == NULL) 226 return NULL; 227 index = wifi_mac_hash(hwaddr); 228 spin_lock_irqsave(&pstapriv->sta_hash_lock, irqL); 229 phead = &(pstapriv->sta_hash[index]); 230 plist = phead->next; 231 while (!end_of_queue_search(phead, plist)) { 232 psta = container_of(plist, struct sta_info, hash_list); 233 if ((!memcmp(psta->hwaddr, hwaddr, ETH_ALEN))) { 234 /* if found the matched address */ 235 break; 236 } 237 psta = NULL; 238 plist = plist->next; 239 } 240 spin_unlock_irqrestore(&pstapriv->sta_hash_lock, irqL); 241 return psta; 242 } 243 244 void r8712_init_bcmc_stainfo(struct _adapter *padapter) 245 { 246 unsigned char bcast_addr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 247 struct sta_priv *pstapriv = &padapter->stapriv; 248 249 r8712_alloc_stainfo(pstapriv, bcast_addr); 250 } 251 252 struct sta_info *r8712_get_bcmc_stainfo(struct _adapter *padapter) 253 { 254 struct sta_priv *pstapriv = &padapter->stapriv; 255 u8 bc_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 256 257 return r8712_get_stainfo(pstapriv, bc_addr); 258 } 259 260 261 u8 r8712_access_ctrl(struct wlan_acl_pool *pacl_list, u8 *mac_addr) 262 { 263 return true; 264 } 265