llc_nop.c
2.35 KB
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/*
* nop (passthrough) Link Layer Control
*
* Copyright (C) 2012 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/types.h>
#include "llc.h"
struct llc_nop {
struct nfc_hci_dev *hdev;
xmit_to_drv_t xmit_to_drv;
rcv_to_hci_t rcv_to_hci;
int tx_headroom;
int tx_tailroom;
llc_failure_t llc_failure;
};
static void *llc_nop_init(struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv,
rcv_to_hci_t rcv_to_hci, int tx_headroom,
int tx_tailroom, int *rx_headroom, int *rx_tailroom,
llc_failure_t llc_failure)
{
struct llc_nop *llc_nop;
*rx_headroom = 0;
*rx_tailroom = 0;
llc_nop = kzalloc(sizeof(struct llc_nop), GFP_KERNEL);
if (llc_nop == NULL)
return NULL;
llc_nop->hdev = hdev;
llc_nop->xmit_to_drv = xmit_to_drv;
llc_nop->rcv_to_hci = rcv_to_hci;
llc_nop->tx_headroom = tx_headroom;
llc_nop->tx_tailroom = tx_tailroom;
llc_nop->llc_failure = llc_failure;
return llc_nop;
}
static void llc_nop_deinit(struct nfc_llc *llc)
{
kfree(nfc_llc_get_data(llc));
}
static int llc_nop_start(struct nfc_llc *llc)
{
return 0;
}
static int llc_nop_stop(struct nfc_llc *llc)
{
return 0;
}
static void llc_nop_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb)
{
struct llc_nop *llc_nop = nfc_llc_get_data(llc);
llc_nop->rcv_to_hci(llc_nop->hdev, skb);
}
static int llc_nop_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb)
{
struct llc_nop *llc_nop = nfc_llc_get_data(llc);
return llc_nop->xmit_to_drv(llc_nop->hdev, skb);
}
static struct nfc_llc_ops llc_nop_ops = {
.init = llc_nop_init,
.deinit = llc_nop_deinit,
.start = llc_nop_start,
.stop = llc_nop_stop,
.rcv_from_drv = llc_nop_rcv_from_drv,
.xmit_from_hci = llc_nop_xmit_from_hci,
};
int nfc_llc_nop_register(void)
{
return nfc_llc_register(LLC_NOP_NAME, &llc_nop_ops);
}