1 // SPDX-License-Identifier: GPL-2.0 2 /****************************************************************************** 3 * recv_linux.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 _RECV_OSDEP_C_ 18 19 #include <linux/usb.h> 20 21 #include "osdep_service.h" 22 #include "drv_types.h" 23 #include "wifi.h" 24 #include "recv_osdep.h" 25 #include "osdep_intf.h" 26 #include "ethernet.h" 27 #include <linux/if_arp.h> 28 #include "usb_ops.h" 29 30 /*init os related resource in struct recv_priv*/ 31 /*alloc os related resource in union recv_frame*/ 32 int r8712_os_recv_resource_alloc(struct _adapter *padapter, 33 union recv_frame *precvframe) 34 { 35 precvframe->u.hdr.pkt_newalloc = NULL; 36 precvframe->u.hdr.pkt = NULL; 37 return _SUCCESS; 38 } 39 40 /*alloc os related resource in struct recv_buf*/ 41 int r8712_os_recvbuf_resource_alloc(struct _adapter *padapter, 42 struct recv_buf *precvbuf) 43 { 44 int res = _SUCCESS; 45 46 precvbuf->irp_pending = false; 47 precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL); 48 if (!precvbuf->purb) 49 res = _FAIL; 50 precvbuf->pskb = NULL; 51 precvbuf->pallocated_buf = NULL; 52 precvbuf->pbuf = NULL; 53 precvbuf->pdata = NULL; 54 precvbuf->phead = NULL; 55 precvbuf->ptail = NULL; 56 precvbuf->pend = NULL; 57 precvbuf->transfer_len = 0; 58 precvbuf->len = 0; 59 return res; 60 } 61 62 /*free os related resource in struct recv_buf*/ 63 int r8712_os_recvbuf_resource_free(struct _adapter *padapter, 64 struct recv_buf *precvbuf) 65 { 66 if (precvbuf->pskb) 67 dev_kfree_skb_any(precvbuf->pskb); 68 if (precvbuf->purb) { 69 usb_kill_urb(precvbuf->purb); 70 usb_free_urb(precvbuf->purb); 71 } 72 return _SUCCESS; 73 } 74 75 void r8712_handle_tkip_mic_err(struct _adapter *padapter, u8 bgroup) 76 { 77 union iwreq_data wrqu; 78 struct iw_michaelmicfailure ev; 79 struct mlme_priv *pmlmepriv = &padapter->mlmepriv; 80 81 memset(&ev, 0x00, sizeof(ev)); 82 if (bgroup) 83 ev.flags |= IW_MICFAILURE_GROUP; 84 else 85 ev.flags |= IW_MICFAILURE_PAIRWISE; 86 ev.src_addr.sa_family = ARPHRD_ETHER; 87 ether_addr_copy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0]); 88 memset(&wrqu, 0x00, sizeof(wrqu)); 89 wrqu.data.length = sizeof(ev); 90 wireless_send_event(padapter->pnetdev, IWEVMICHAELMICFAILURE, &wrqu, 91 (char *)&ev); 92 } 93 94 void r8712_recv_indicatepkt(struct _adapter *padapter, 95 union recv_frame *precv_frame) 96 { 97 struct recv_priv *precvpriv; 98 struct __queue *pfree_recv_queue; 99 _pkt *skb; 100 struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; 101 102 precvpriv = &padapter->recvpriv; 103 pfree_recv_queue = &precvpriv->free_recv_queue; 104 skb = precv_frame->u.hdr.pkt; 105 if (!skb) 106 goto _recv_indicatepkt_drop; 107 skb->data = precv_frame->u.hdr.rx_data; 108 skb->len = precv_frame->u.hdr.len; 109 skb_set_tail_pointer(skb, skb->len); 110 if ((pattrib->tcpchk_valid == 1) && (pattrib->tcp_chkrpt == 1)) 111 skb->ip_summed = CHECKSUM_UNNECESSARY; 112 else 113 skb->ip_summed = CHECKSUM_NONE; 114 skb->dev = padapter->pnetdev; 115 skb->protocol = eth_type_trans(skb, padapter->pnetdev); 116 netif_rx(skb); 117 precv_frame->u.hdr.pkt = NULL; /* pointers to NULL before 118 * r8712_free_recvframe() 119 */ 120 r8712_free_recvframe(precv_frame, pfree_recv_queue); 121 return; 122 _recv_indicatepkt_drop: 123 /*enqueue back to free_recv_queue*/ 124 if (precv_frame) 125 r8712_free_recvframe(precv_frame, pfree_recv_queue); 126 precvpriv->rx_drop++; 127 } 128 129 static void _r8712_reordering_ctrl_timeout_handler (struct timer_list *t) 130 { 131 struct recv_reorder_ctrl *preorder_ctrl = 132 from_timer(preorder_ctrl, t, reordering_ctrl_timer); 133 134 r8712_reordering_ctrl_timeout_handler(preorder_ctrl); 135 } 136 137 void r8712_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl) 138 { 139 timer_setup(&preorder_ctrl->reordering_ctrl_timer, 140 _r8712_reordering_ctrl_timeout_handler, 0); 141 } 142