1 // SPDX-License-Identifier: GPL-2.0 2 /****************************************************************************** 3 * xmit_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 _XMIT_OSDEP_C_ 18 19 #include <linux/usb.h> 20 #include <linux/ip.h> 21 #include <linux/if_ether.h> 22 #include <linux/kmemleak.h> 23 24 #include "osdep_service.h" 25 #include "drv_types.h" 26 27 #include "wifi.h" 28 #include "mlme_osdep.h" 29 #include "xmit_osdep.h" 30 #include "osdep_intf.h" 31 32 static uint remainder_len(struct pkt_file *pfile) 33 { 34 return (uint)(pfile->buf_len - ((addr_t)(pfile->cur_addr) - 35 (addr_t)(pfile->buf_start))); 36 } 37 38 void _r8712_open_pktfile(_pkt *pktptr, struct pkt_file *pfile) 39 { 40 pfile->pkt = pktptr; 41 pfile->cur_addr = pfile->buf_start = pktptr->data; 42 pfile->pkt_len = pfile->buf_len = pktptr->len; 43 pfile->cur_buffer = pfile->buf_start; 44 } 45 46 uint _r8712_pktfile_read(struct pkt_file *pfile, u8 *rmem, uint rlen) 47 { 48 uint len; 49 50 len = remainder_len(pfile); 51 len = (rlen > len) ? len : rlen; 52 if (rmem) 53 skb_copy_bits(pfile->pkt, pfile->buf_len - pfile->pkt_len, 54 rmem, len); 55 pfile->cur_addr += len; 56 pfile->pkt_len -= len; 57 return len; 58 } 59 60 sint r8712_endofpktfile(struct pkt_file *pfile) 61 { 62 return (pfile->pkt_len == 0); 63 } 64 65 void r8712_set_qos(struct pkt_file *ppktfile, struct pkt_attrib *pattrib) 66 { 67 struct ethhdr etherhdr; 68 struct iphdr ip_hdr; 69 u16 user_priority = 0; 70 71 _r8712_open_pktfile(ppktfile->pkt, ppktfile); 72 _r8712_pktfile_read(ppktfile, (unsigned char *)ðerhdr, ETH_HLEN); 73 74 /* get user_priority from IP hdr*/ 75 if (pattrib->ether_type == 0x0800) { 76 _r8712_pktfile_read(ppktfile, (u8 *)&ip_hdr, sizeof(ip_hdr)); 77 /*user_priority = (ntohs(ip_hdr.tos) >> 5) & 0x3 ;*/ 78 user_priority = ip_hdr.tos >> 5; 79 } else { 80 /* "When priority processing of data frames is supported, 81 * a STA's SME should send EAPOL-Key frames at the highest 82 * priority." 83 */ 84 85 if (pattrib->ether_type == 0x888e) 86 user_priority = 7; 87 } 88 pattrib->priority = user_priority; 89 pattrib->hdrlen = WLAN_HDR_A3_QOS_LEN; 90 pattrib->subtype = WIFI_QOS_DATA_TYPE; 91 } 92 93 void r8712_SetFilter(struct work_struct *work) 94 { 95 struct _adapter *adapter = container_of(work, struct _adapter, 96 wk_filter_rx_ff0); 97 u8 oldvalue = 0x00, newvalue = 0x00; 98 99 oldvalue = r8712_read8(adapter, 0x117); 100 newvalue = oldvalue & 0xfe; 101 r8712_write8(adapter, 0x117, newvalue); 102 103 wait_for_completion(&adapter->rx_filter_ready); 104 r8712_write8(adapter, 0x117, oldvalue); 105 } 106 107 int r8712_xmit_resource_alloc(struct _adapter *padapter, 108 struct xmit_buf *pxmitbuf) 109 { 110 int i; 111 112 for (i = 0; i < 8; i++) { 113 pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL); 114 if (!pxmitbuf->pxmit_urb[i]) { 115 netdev_err(padapter->pnetdev, "pxmitbuf->pxmit_urb[i] == NULL\n"); 116 return -ENOMEM; 117 } 118 kmemleak_not_leak(pxmitbuf->pxmit_urb[i]); 119 } 120 return 0; 121 } 122 123 void r8712_xmit_resource_free(struct _adapter *padapter, 124 struct xmit_buf *pxmitbuf) 125 { 126 int i; 127 128 for (i = 0; i < 8; i++) { 129 if (pxmitbuf->pxmit_urb[i]) { 130 usb_kill_urb(pxmitbuf->pxmit_urb[i]); 131 usb_free_urb(pxmitbuf->pxmit_urb[i]); 132 } 133 } 134 } 135 136 void r8712_xmit_complete(struct _adapter *padapter, struct xmit_frame *pxframe) 137 { 138 if (pxframe->pkt) 139 dev_kfree_skb_any(pxframe->pkt); 140 pxframe->pkt = NULL; 141 } 142 143 netdev_tx_t r8712_xmit_entry(_pkt *pkt, struct net_device *netdev) 144 { 145 struct xmit_frame *xmitframe = NULL; 146 struct _adapter *adapter = netdev_priv(netdev); 147 struct xmit_priv *xmitpriv = &(adapter->xmitpriv); 148 149 if (!r8712_if_up(adapter)) 150 goto _xmit_entry_drop; 151 152 xmitframe = r8712_alloc_xmitframe(xmitpriv); 153 if (!xmitframe) 154 goto _xmit_entry_drop; 155 156 if (r8712_update_attrib(adapter, pkt, &xmitframe->attrib)) 157 goto _xmit_entry_drop; 158 159 adapter->ledpriv.LedControlHandler(adapter, LED_CTL_TX); 160 xmitframe->pkt = pkt; 161 if (r8712_pre_xmit(adapter, xmitframe)) { 162 /*dump xmitframe directly or drop xframe*/ 163 dev_kfree_skb_any(pkt); 164 xmitframe->pkt = NULL; 165 } 166 xmitpriv->tx_pkts++; 167 xmitpriv->tx_bytes += xmitframe->attrib.last_txcmdsz; 168 return NETDEV_TX_OK; 169 _xmit_entry_drop: 170 if (xmitframe) 171 r8712_free_xmitframe(xmitpriv, xmitframe); 172 xmitpriv->tx_drop++; 173 dev_kfree_skb_any(pkt); 174 return NETDEV_TX_OK; 175 } 176