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 void 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 } 38 39 /*alloc os related resource in struct recv_buf*/ 40 int r8712_os_recvbuf_resource_alloc(struct _adapter *padapter, 41 struct recv_buf *precvbuf) 42 { 43 int res = 0; 44 45 precvbuf->irp_pending = false; 46 precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL); 47 if (!precvbuf->purb) 48 res = -ENOMEM; 49 precvbuf->pskb = NULL; 50 precvbuf->pallocated_buf = NULL; 51 precvbuf->pbuf = NULL; 52 precvbuf->pdata = NULL; 53 precvbuf->phead = NULL; 54 precvbuf->ptail = NULL; 55 precvbuf->pend = NULL; 56 precvbuf->transfer_len = 0; 57 precvbuf->len = 0; 58 return res; 59 } 60 61 /*free os related resource in struct recv_buf*/ 62 void r8712_os_recvbuf_resource_free(struct _adapter *padapter, 63 struct recv_buf *precvbuf) 64 { 65 if (precvbuf->pskb) 66 dev_kfree_skb_any(precvbuf->pskb); 67 if (precvbuf->purb) { 68 usb_kill_urb(precvbuf->purb); 69 usb_free_urb(precvbuf->purb); 70 } 71 } 72 73 void r8712_handle_tkip_mic_err(struct _adapter *adapter, u8 bgroup) 74 { 75 union iwreq_data wrqu; 76 struct iw_michaelmicfailure ev; 77 struct mlme_priv *mlmepriv = &adapter->mlmepriv; 78 79 memset(&ev, 0x00, sizeof(ev)); 80 if (bgroup) 81 ev.flags |= IW_MICFAILURE_GROUP; 82 else 83 ev.flags |= IW_MICFAILURE_PAIRWISE; 84 ev.src_addr.sa_family = ARPHRD_ETHER; 85 ether_addr_copy(ev.src_addr.sa_data, &mlmepriv->assoc_bssid[0]); 86 memset(&wrqu, 0x00, sizeof(wrqu)); 87 wrqu.data.length = sizeof(ev); 88 wireless_send_event(adapter->pnetdev, IWEVMICHAELMICFAILURE, &wrqu, 89 (char *)&ev); 90 } 91 92 void r8712_recv_indicatepkt(struct _adapter *adapter, 93 union recv_frame *recvframe) 94 { 95 struct recv_priv *recvpriv; 96 struct __queue *free_recv_queue; 97 _pkt *skb; 98 struct rx_pkt_attrib *attrib = &recvframe->u.hdr.attrib; 99 100 recvpriv = &adapter->recvpriv; 101 free_recv_queue = &recvpriv->free_recv_queue; 102 skb = recvframe->u.hdr.pkt; 103 if (!skb) 104 goto _recv_indicatepkt_drop; 105 skb->data = recvframe->u.hdr.rx_data; 106 skb->len = recvframe->u.hdr.len; 107 skb_set_tail_pointer(skb, skb->len); 108 if ((attrib->tcpchk_valid == 1) && (attrib->tcp_chkrpt == 1)) 109 skb->ip_summed = CHECKSUM_UNNECESSARY; 110 else 111 skb->ip_summed = CHECKSUM_NONE; 112 skb->dev = adapter->pnetdev; 113 skb->protocol = eth_type_trans(skb, adapter->pnetdev); 114 netif_rx(skb); 115 recvframe->u.hdr.pkt = NULL; /* pointers to NULL before 116 * r8712_free_recvframe() 117 */ 118 r8712_free_recvframe(recvframe, free_recv_queue); 119 return; 120 _recv_indicatepkt_drop: 121 /*enqueue back to free_recv_queue*/ 122 if (recvframe) 123 r8712_free_recvframe(recvframe, free_recv_queue); 124 recvpriv->rx_drop++; 125 } 126 127 static void _r8712_reordering_ctrl_timeout_handler (struct timer_list *t) 128 { 129 struct recv_reorder_ctrl *reorder_ctrl = 130 from_timer(reorder_ctrl, t, reordering_ctrl_timer); 131 132 r8712_reordering_ctrl_timeout_handler(reorder_ctrl); 133 } 134 135 void r8712_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl) 136 { 137 timer_setup(&preorder_ctrl->reordering_ctrl_timer, 138 _r8712_reordering_ctrl_timeout_handler, 0); 139 } 140