kernel/drivers/staging/rtl8192e/rtl8192e/r8192E_cmdpkt.c

   1 /******************************************************************************
   2  * Copyright(c) 2008 - 2010 Realtek Corporation. All rights reserved.
   3  *
   4  * This program is distributed in the hope that it will be useful, but WITHOUT
   5  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   6  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   7  * more details.
   8  *
   9  * The full GNU General Public License is included in this distribution in the
  10  * file called LICENSE.
  11  *
  12  * Contact Information:
  13  * wlanfae <wlanfae@realtek.com>
  14 ******************************************************************************/
  15
  16 #include "rtl_core.h"
  17 #include "r8192E_hw.h"
  18 #include "r8192E_cmdpkt.h"
  19
  20 bool rtl92e_send_cmd_pkt(struct net_device *dev, u32 type, const void *data,
  21                          u32 len)
  22 {
  23
  24         bool                            rt_status = true;
  25         struct r8192_priv *priv = rtllib_priv(dev);
  26         u16                             frag_length = 0, frag_offset = 0;
  27         struct sk_buff          *skb;
  28         unsigned char           *seg_ptr;
  29         struct cb_desc *tcb_desc;
  30         u8                              bLastIniPkt;
  31
  32         struct tx_fwinfo_8190pci *pTxFwInfo = NULL;
  33
  34         RT_TRACE(COMP_CMDPKT, "%s(),buffer_len is %d\n", __func__, len);
  35
  36         do {
  37                 if ((len - frag_offset) > CMDPACKET_FRAG_SIZE) {
  38                         frag_length = CMDPACKET_FRAG_SIZE;
  39                         bLastIniPkt = 0;
  40
  41                 } else {
  42                         frag_length = (u16)(len - frag_offset);
  43                         bLastIniPkt = 1;
  44                 }
  45
  46                 if (type == DESC_PACKET_TYPE_NORMAL)
  47                         skb = dev_alloc_skb(frag_length +
  48                                             priv->rtllib->tx_headroom + 4);
  49                 else
  50                         skb = dev_alloc_skb(frag_length + 4);
  51
  52                 if (skb == NULL) {
  53                         rt_status = false;
  54                         goto Failed;
  55                 }
  56
  57                 memcpy((unsigned char *)(skb->cb), &dev, sizeof(dev));
  58                 tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
  59                 tcb_desc->queue_index = TXCMD_QUEUE;
  60                 tcb_desc->bCmdOrInit = type;
  61                 tcb_desc->bLastIniPkt = bLastIniPkt;
  62
  63                 if (type == DESC_PACKET_TYPE_NORMAL) {
  64                         tcb_desc->pkt_size = frag_length;
  65
  66                         seg_ptr = skb_put(skb, priv->rtllib->tx_headroom);
  67                         pTxFwInfo = (struct tx_fwinfo_8190pci *)seg_ptr;
  68                         memset(pTxFwInfo, 0, sizeof(struct tx_fwinfo_8190pci));
  69                         memset(pTxFwInfo, 0x12, 8);
  70                 } else {
  71                         tcb_desc->txbuf_size = (u16)frag_length;
  72                 }
  73
  74                 seg_ptr = skb_put(skb, frag_length);
  75                 memcpy(seg_ptr, data, (u32)frag_length);
  76
  77                 if (type == DESC_PACKET_TYPE_INIT &&
  78                     (!priv->rtllib->check_nic_enough_desc(dev, TXCMD_QUEUE) ||
  79                      (!skb_queue_empty(&priv->rtllib->skb_waitQ[TXCMD_QUEUE])) ||
  80                      (priv->rtllib->queue_stop))) {
  81                         skb_queue_tail(&priv->rtllib->skb_waitQ[TXCMD_QUEUE],
  82                                        skb);
  83                 } else {
  84                         priv->rtllib->softmac_hard_start_xmit(skb, dev);
  85                 }
  86
  87                 data += frag_length;
  88                 frag_offset += frag_length;
  89
  90         } while (frag_offset < len);
  91
  92         rtl92e_writeb(dev, TPPoll, TPPoll_CQ);
  93 Failed:
  94         return rt_status;
  95 }