1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * nop (passthrough) Link Layer Control
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2012 Intel Corporation. All rights reserved.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/types.h>
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include "llc.h"
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun struct llc_nop {
13*4882a593Smuzhiyun struct nfc_hci_dev *hdev;
14*4882a593Smuzhiyun xmit_to_drv_t xmit_to_drv;
15*4882a593Smuzhiyun rcv_to_hci_t rcv_to_hci;
16*4882a593Smuzhiyun int tx_headroom;
17*4882a593Smuzhiyun int tx_tailroom;
18*4882a593Smuzhiyun llc_failure_t llc_failure;
19*4882a593Smuzhiyun };
20*4882a593Smuzhiyun
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)21*4882a593Smuzhiyun static void *llc_nop_init(struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv,
22*4882a593Smuzhiyun rcv_to_hci_t rcv_to_hci, int tx_headroom,
23*4882a593Smuzhiyun int tx_tailroom, int *rx_headroom, int *rx_tailroom,
24*4882a593Smuzhiyun llc_failure_t llc_failure)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun struct llc_nop *llc_nop;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun *rx_headroom = 0;
29*4882a593Smuzhiyun *rx_tailroom = 0;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun llc_nop = kzalloc(sizeof(struct llc_nop), GFP_KERNEL);
32*4882a593Smuzhiyun if (llc_nop == NULL)
33*4882a593Smuzhiyun return NULL;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun llc_nop->hdev = hdev;
36*4882a593Smuzhiyun llc_nop->xmit_to_drv = xmit_to_drv;
37*4882a593Smuzhiyun llc_nop->rcv_to_hci = rcv_to_hci;
38*4882a593Smuzhiyun llc_nop->tx_headroom = tx_headroom;
39*4882a593Smuzhiyun llc_nop->tx_tailroom = tx_tailroom;
40*4882a593Smuzhiyun llc_nop->llc_failure = llc_failure;
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun return llc_nop;
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
llc_nop_deinit(struct nfc_llc * llc)45*4882a593Smuzhiyun static void llc_nop_deinit(struct nfc_llc *llc)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun kfree(nfc_llc_get_data(llc));
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
llc_nop_start(struct nfc_llc * llc)50*4882a593Smuzhiyun static int llc_nop_start(struct nfc_llc *llc)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun return 0;
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
llc_nop_stop(struct nfc_llc * llc)55*4882a593Smuzhiyun static int llc_nop_stop(struct nfc_llc *llc)
56*4882a593Smuzhiyun {
57*4882a593Smuzhiyun return 0;
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
llc_nop_rcv_from_drv(struct nfc_llc * llc,struct sk_buff * skb)60*4882a593Smuzhiyun static void llc_nop_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb)
61*4882a593Smuzhiyun {
62*4882a593Smuzhiyun struct llc_nop *llc_nop = nfc_llc_get_data(llc);
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun llc_nop->rcv_to_hci(llc_nop->hdev, skb);
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
llc_nop_xmit_from_hci(struct nfc_llc * llc,struct sk_buff * skb)67*4882a593Smuzhiyun static int llc_nop_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb)
68*4882a593Smuzhiyun {
69*4882a593Smuzhiyun struct llc_nop *llc_nop = nfc_llc_get_data(llc);
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun return llc_nop->xmit_to_drv(llc_nop->hdev, skb);
72*4882a593Smuzhiyun }
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun static struct nfc_llc_ops llc_nop_ops = {
75*4882a593Smuzhiyun .init = llc_nop_init,
76*4882a593Smuzhiyun .deinit = llc_nop_deinit,
77*4882a593Smuzhiyun .start = llc_nop_start,
78*4882a593Smuzhiyun .stop = llc_nop_stop,
79*4882a593Smuzhiyun .rcv_from_drv = llc_nop_rcv_from_drv,
80*4882a593Smuzhiyun .xmit_from_hci = llc_nop_xmit_from_hci,
81*4882a593Smuzhiyun };
82*4882a593Smuzhiyun
nfc_llc_nop_register(void)83*4882a593Smuzhiyun int nfc_llc_nop_register(void)
84*4882a593Smuzhiyun {
85*4882a593Smuzhiyun return nfc_llc_register(LLC_NOP_NAME, &llc_nop_ops);
86*4882a593Smuzhiyun }
87