1/****************************************************************************** 2 * recv_linux.c 3 * 4 * Copyright(c) 2007 - 2010 Realtek Corporation. All rights reserved. 5 * Linux device driver for RTL8192SU 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of version 2 of the GNU General Public License as 9 * published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 14 * more details. 15 * 16 * You should have received a copy of the GNU General Public License along with 17 * this program; if not, write to the Free Software Foundation, Inc., 18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA 19 * 20 * Modifications for inclusion into the Linux staging tree are 21 * Copyright(c) 2010 Larry Finger. All rights reserved. 22 * 23 * Contact information: 24 * WLAN FAE <wlanfae@realtek.com>. 25 * Larry Finger <Larry.Finger@lwfinger.net> 26 * 27 ******************************************************************************/ 28 29#define _RECV_OSDEP_C_ 30 31#include <linux/usb.h> 32 33#include "osdep_service.h" 34#include "drv_types.h" 35#include "wifi.h" 36#include "recv_osdep.h" 37#include "osdep_intf.h" 38#include "ethernet.h" 39#include <linux/if_arp.h> 40#include "usb_ops.h" 41 42/*init os related resource in struct recv_priv*/ 43/*alloc os related resource in union recv_frame*/ 44int r8712_os_recv_resource_alloc(struct _adapter *padapter, 45 union recv_frame *precvframe) 46{ 47 precvframe->u.hdr.pkt_newalloc = precvframe->u.hdr.pkt = NULL; 48 return _SUCCESS; 49} 50 51/*alloc os related resource in struct recv_buf*/ 52int r8712_os_recvbuf_resource_alloc(struct _adapter *padapter, 53 struct recv_buf *precvbuf) 54{ 55 int res = _SUCCESS; 56 57 precvbuf->irp_pending = false; 58 precvbuf->purb = usb_alloc_urb(0, GFP_KERNEL); 59 if (precvbuf->purb == NULL) 60 res = _FAIL; 61 precvbuf->pskb = NULL; 62 precvbuf->reuse = false; 63 precvbuf->pallocated_buf = NULL; 64 precvbuf->pbuf = NULL; 65 precvbuf->pdata = NULL; 66 precvbuf->phead = NULL; 67 precvbuf->ptail = NULL; 68 precvbuf->pend = NULL; 69 precvbuf->transfer_len = 0; 70 precvbuf->len = 0; 71 return res; 72} 73 74/*free os related resource in struct recv_buf*/ 75int r8712_os_recvbuf_resource_free(struct _adapter *padapter, 76 struct recv_buf *precvbuf) 77{ 78 if (precvbuf->pskb) 79 dev_kfree_skb_any(precvbuf->pskb); 80 if (precvbuf->purb) { 81 usb_kill_urb(precvbuf->purb); 82 usb_free_urb(precvbuf->purb); 83 } 84 return _SUCCESS; 85} 86 87void r8712_handle_tkip_mic_err(struct _adapter *padapter, u8 bgroup) 88{ 89 union iwreq_data wrqu; 90 struct iw_michaelmicfailure ev; 91 struct mlme_priv *pmlmepriv = &padapter->mlmepriv; 92 93 memset(&ev, 0x00, sizeof(ev)); 94 if (bgroup) 95 ev.flags |= IW_MICFAILURE_GROUP; 96 else 97 ev.flags |= IW_MICFAILURE_PAIRWISE; 98 ev.src_addr.sa_family = ARPHRD_ETHER; 99 memcpy(ev.src_addr.sa_data, &pmlmepriv->assoc_bssid[0], ETH_ALEN); 100 memset(&wrqu, 0x00, sizeof(wrqu)); 101 wrqu.data.length = sizeof(ev); 102 wireless_send_event(padapter->pnetdev, IWEVMICHAELMICFAILURE, &wrqu, 103 (char *)&ev); 104} 105 106void r8712_recv_indicatepkt(struct _adapter *padapter, 107 union recv_frame *precv_frame) 108{ 109 struct recv_priv *precvpriv; 110 struct __queue *pfree_recv_queue; 111 _pkt *skb; 112 struct rx_pkt_attrib *pattrib = &precv_frame->u.hdr.attrib; 113 114 precvpriv = &(padapter->recvpriv); 115 pfree_recv_queue = &(precvpriv->free_recv_queue); 116 skb = precv_frame->u.hdr.pkt; 117 if (skb == NULL) 118 goto _recv_indicatepkt_drop; 119 skb->data = precv_frame->u.hdr.rx_data; 120 skb->len = precv_frame->u.hdr.len; 121 skb_set_tail_pointer(skb, skb->len); 122 if ((pattrib->tcpchk_valid == 1) && (pattrib->tcp_chkrpt == 1)) 123 skb->ip_summed = CHECKSUM_UNNECESSARY; 124 else 125 skb->ip_summed = CHECKSUM_NONE; 126 skb->dev = padapter->pnetdev; 127 skb->protocol = eth_type_trans(skb, padapter->pnetdev); 128 netif_rx(skb); 129 precv_frame->u.hdr.pkt = NULL; /* pointers to NULL before 130 * r8712_free_recvframe() */ 131 r8712_free_recvframe(precv_frame, pfree_recv_queue); 132 return; 133_recv_indicatepkt_drop: 134 /*enqueue back to free_recv_queue*/ 135 if (precv_frame) 136 r8712_free_recvframe(precv_frame, pfree_recv_queue); 137 precvpriv->rx_drop++; 138} 139 140void r8712_os_read_port(struct _adapter *padapter, struct recv_buf *precvbuf) 141{ 142 struct recv_priv *precvpriv = &padapter->recvpriv; 143 144 precvbuf->ref_cnt--; 145 /*free skb in recv_buf*/ 146 dev_kfree_skb_any(precvbuf->pskb); 147 precvbuf->pskb = NULL; 148 precvbuf->reuse = false; 149 if (precvbuf->irp_pending == false) 150 r8712_read_port(padapter, precvpriv->ff_hwaddr, 0, 151 (unsigned char *)precvbuf); 152} 153 154static void _r8712_reordering_ctrl_timeout_handler (void *FunctionContext) 155{ 156 struct recv_reorder_ctrl *preorder_ctrl = 157 (struct recv_reorder_ctrl *)FunctionContext; 158 159 r8712_reordering_ctrl_timeout_handler(preorder_ctrl); 160} 161 162void r8712_init_recv_timer(struct recv_reorder_ctrl *preorder_ctrl) 163{ 164 struct _adapter *padapter = preorder_ctrl->padapter; 165 166 _init_timer(&(preorder_ctrl->reordering_ctrl_timer), padapter->pnetdev, 167 _r8712_reordering_ctrl_timeout_handler, preorder_ctrl); 168} 169