drivers/staging/rtl8712/xmit_linux.c

   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 UserPriority = 0;
  70
  71         _r8712_open_pktfile(ppktfile->pkt, ppktfile);
  72         _r8712_pktfile_read(ppktfile, (unsigned char *)&etherhdr, ETH_HLEN);
  73
  74         /* get UserPriority from IP hdr*/
  75         if (pattrib->ether_type == 0x0800) {
  76                 _r8712_pktfile_read(ppktfile, (u8 *)&ip_hdr, sizeof(ip_hdr));
  77                 /*UserPriority = (ntohs(ip_hdr.tos) >> 5) & 0x3 ;*/
  78                 UserPriority = 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                         UserPriority = 7;
  87         }
  88         pattrib->priority = UserPriority;
  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         unsigned long irqL;
  99
 100         oldvalue = r8712_read8(adapter, 0x117);
 101         newvalue = oldvalue & 0xfe;
 102         r8712_write8(adapter, 0x117, newvalue);
 103
 104         spin_lock_irqsave(&adapter->lock_rx_ff0_filter, irqL);
 105         adapter->blnEnableRxFF0Filter = 1;
 106         spin_unlock_irqrestore(&adapter->lock_rx_ff0_filter, irqL);
 107         do {
 108                 msleep(100);
 109         } while (adapter->blnEnableRxFF0Filter == 1);
 110         r8712_write8(adapter, 0x117, oldvalue);
 111 }
 112
 113 int r8712_xmit_resource_alloc(struct _adapter *padapter,
 114                               struct xmit_buf *pxmitbuf)
 115 {
 116         int i;
 117
 118         for (i = 0; i < 8; i++) {
 119                 pxmitbuf->pxmit_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
 120                 if (!pxmitbuf->pxmit_urb[i]) {
 121                         netdev_err(padapter->pnetdev, "pxmitbuf->pxmit_urb[i] == NULL\n");
 122                         return -ENOMEM;
 123                 }
 124                 kmemleak_not_leak(pxmitbuf->pxmit_urb[i]);
 125         }
 126         return 0;
 127 }
 128
 129 void r8712_xmit_resource_free(struct _adapter *padapter,
 130                               struct xmit_buf *pxmitbuf)
 131 {
 132         int i;
 133
 134         for (i = 0; i < 8; i++) {
 135                 if (pxmitbuf->pxmit_urb[i]) {
 136                         usb_kill_urb(pxmitbuf->pxmit_urb[i]);
 137                         usb_free_urb(pxmitbuf->pxmit_urb[i]);
 138                 }
 139         }
 140 }
 141
 142 void r8712_xmit_complete(struct _adapter *padapter, struct xmit_frame *pxframe)
 143 {
 144         if (pxframe->pkt)
 145                 dev_kfree_skb_any(pxframe->pkt);
 146         pxframe->pkt = NULL;
 147 }
 148
 149 int r8712_xmit_entry(_pkt *pkt, struct  net_device *netdev)
 150 {
 151         struct xmit_frame *xmitframe = NULL;
 152         struct _adapter *adapter = netdev_priv(netdev);
 153         struct xmit_priv *xmitpriv = &(adapter->xmitpriv);
 154
 155         if (!r8712_if_up(adapter))
 156                 goto _xmit_entry_drop;
 157
 158         xmitframe = r8712_alloc_xmitframe(xmitpriv);
 159         if (!xmitframe)
 160                 goto _xmit_entry_drop;
 161
 162         if (r8712_update_attrib(adapter, pkt, &xmitframe->attrib))
 163                 goto _xmit_entry_drop;
 164
 165         adapter->ledpriv.LedControlHandler(adapter, LED_CTL_TX);
 166         xmitframe->pkt = pkt;
 167         if (r8712_pre_xmit(adapter, xmitframe)) {
 168                 /*dump xmitframe directly or drop xframe*/
 169                 dev_kfree_skb_any(pkt);
 170                 xmitframe->pkt = NULL;
 171         }
 172         xmitpriv->tx_pkts++;
 173         xmitpriv->tx_bytes += xmitframe->attrib.last_txcmdsz;
 174         return 0;
 175 _xmit_entry_drop:
 176         if (xmitframe)
 177                 r8712_free_xmitframe(xmitpriv, xmitframe);
 178         xmitpriv->tx_drop++;
 179         dev_kfree_skb_any(pkt);
 180         return 0;
 181 }