drivers/staging/rtl8192e/rtl8192e/r8192E_cmdpkt.c

/******************************************************************************
 * Copyright(c) 2008 - 2010 Realtek Corporation. All rights reserved.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 * wlanfae <wlanfae@realtek.com>
******************************************************************************/

#include "rtl_core.h"
#include "r8192E_hw.h"
#include "r8192E_cmdpkt.h"

bool rtl92e_send_cmd_pkt(struct net_device *dev, u32 type, const void *data,
			 u32 len)
{

	bool				rt_status = true;
	struct r8192_priv *priv = rtllib_priv(dev);
	u16				frag_length = 0, frag_offset = 0;
	struct sk_buff		*skb;
	unsigned char		*seg_ptr;
	struct cb_desc *tcb_desc;
	u8				bLastIniPkt;

	struct tx_fwinfo_8190pci *pTxFwInfo = NULL;

	RT_TRACE(COMP_CMDPKT, "%s(),buffer_len is %d\n", __func__, len);

	do {
		if ((len - frag_offset) > CMDPACKET_FRAG_SIZE) {
			frag_length = CMDPACKET_FRAG_SIZE;
			bLastIniPkt = 0;

		} else {
			frag_length = (u16)(len - frag_offset);
			bLastIniPkt = 1;
		}

		if (type == DESC_PACKET_TYPE_NORMAL)
			skb = dev_alloc_skb(frag_length +
					    priv->rtllib->tx_headroom + 4);
		else
			skb = dev_alloc_skb(frag_length + 4);

		if (skb == NULL) {
			rt_status = false;
			goto Failed;
		}

		memcpy((unsigned char *)(skb->cb), &dev, sizeof(dev));
		tcb_desc = (struct cb_desc *)(skb->cb + MAX_DEV_ADDR_SIZE);
		tcb_desc->queue_index = TXCMD_QUEUE;
		tcb_desc->bCmdOrInit = type;
		tcb_desc->bLastIniPkt = bLastIniPkt;

		if (type == DESC_PACKET_TYPE_NORMAL) {
			tcb_desc->pkt_size = frag_length;

			seg_ptr = skb_put(skb, priv->rtllib->tx_headroom);
			pTxFwInfo = (struct tx_fwinfo_8190pci *)seg_ptr;
			memset(pTxFwInfo, 0, sizeof(struct tx_fwinfo_8190pci));
			memset(pTxFwInfo, 0x12, 8);
		} else {
			tcb_desc->txbuf_size = (u16)frag_length;
		}

		seg_ptr = skb_put(skb, frag_length);
		memcpy(seg_ptr, data, (u32)frag_length);

		if (type == DESC_PACKET_TYPE_INIT &&
		    (!priv->rtllib->check_nic_enough_desc(dev, TXCMD_QUEUE) ||
		     (!skb_queue_empty(&priv->rtllib->skb_waitQ[TXCMD_QUEUE])) ||
		     (priv->rtllib->queue_stop))) {
			skb_queue_tail(&priv->rtllib->skb_waitQ[TXCMD_QUEUE],
				       skb);
		} else {
			priv->rtllib->softmac_hard_start_xmit(skb, dev);
		}

		data += frag_length;
		frag_offset += frag_length;

	} while (frag_offset < len);

	rtl92e_writeb(dev, TPPoll, TPPoll_CQ);
Failed:
	return rt_status;
}