167cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade/* 267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade * Link Layer Control manager 367cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade * 467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade * Copyright (C) 2012 Intel Corporation. All rights reserved. 567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade * 667cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade * This program is free software; you can redistribute it and/or modify it 767cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade * under the terms and conditions of the GNU General Public License, 867cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade * version 2, as published by the Free Software Foundation. 967cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade * 1067cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade * This program is distributed in the hope that it will be useful, 1167cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade * but WITHOUT ANY WARRANTY; without even the implied warranty of 1267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1367cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade * GNU General Public License for more details. 1467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade * 1567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade * You should have received a copy of the GNU General Public License 1698b32decc83ed3137e3ddbc918b102f8fc406b6dJeff Kirsher * along with this program; if not, see <http://www.gnu.org/licenses/>. 1767cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade */ 1867cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 1967cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade#include <net/nfc/llc.h> 20f4f20d0650e9cd13f65b5e7f93af126b526af721Samuel Ortiz 2167cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade#include "llc.h" 2267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 230b51fc5633df563695f5021bc121a9df20b3eb14Axel Linstatic LIST_HEAD(llc_engines); 2467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 2567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyadeint nfc_llc_init(void) 2667cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade{ 274a61cd6687fc6348d08724676d34e38160d6cf9bEric Lapuyade int r; 284a61cd6687fc6348d08724676d34e38160d6cf9bEric Lapuyade 294a61cd6687fc6348d08724676d34e38160d6cf9bEric Lapuyade r = nfc_llc_nop_register(); 304a61cd6687fc6348d08724676d34e38160d6cf9bEric Lapuyade if (r) 314a61cd6687fc6348d08724676d34e38160d6cf9bEric Lapuyade goto exit; 324a61cd6687fc6348d08724676d34e38160d6cf9bEric Lapuyade 334a61cd6687fc6348d08724676d34e38160d6cf9bEric Lapuyade r = nfc_llc_shdlc_register(); 344a61cd6687fc6348d08724676d34e38160d6cf9bEric Lapuyade if (r) 354a61cd6687fc6348d08724676d34e38160d6cf9bEric Lapuyade goto exit; 364a61cd6687fc6348d08724676d34e38160d6cf9bEric Lapuyade 374a61cd6687fc6348d08724676d34e38160d6cf9bEric Lapuyade return 0; 384a61cd6687fc6348d08724676d34e38160d6cf9bEric Lapuyade 394a61cd6687fc6348d08724676d34e38160d6cf9bEric Lapuyadeexit: 404a61cd6687fc6348d08724676d34e38160d6cf9bEric Lapuyade nfc_llc_exit(); 414a61cd6687fc6348d08724676d34e38160d6cf9bEric Lapuyade return r; 4267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade} 4367cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 4467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyadevoid nfc_llc_exit(void) 4567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade{ 4667cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade struct nfc_llc_engine *llc_engine, *n; 4767cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 4867cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade list_for_each_entry_safe(llc_engine, n, &llc_engines, entry) { 4967cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade list_del(&llc_engine->entry); 5067cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade kfree(llc_engine->name); 5167cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade kfree(llc_engine); 5267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade } 5367cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade} 5467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 5567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyadeint nfc_llc_register(const char *name, struct nfc_llc_ops *ops) 5667cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade{ 5767cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade struct nfc_llc_engine *llc_engine; 5867cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 5967cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade llc_engine = kzalloc(sizeof(struct nfc_llc_engine), GFP_KERNEL); 6067cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade if (llc_engine == NULL) 6167cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade return -ENOMEM; 6267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 6367cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade llc_engine->name = kstrdup(name, GFP_KERNEL); 6467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade if (llc_engine->name == NULL) { 6567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade kfree(llc_engine); 6667cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade return -ENOMEM; 6767cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade } 6867cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade llc_engine->ops = ops; 6967cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 7067cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade INIT_LIST_HEAD(&llc_engine->entry); 710f450772224f99db3b8384bfb8f751889d0c4cb8Szymon Janc list_add_tail(&llc_engine->entry, &llc_engines); 7267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 7367cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade return 0; 7467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade} 7567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 7667cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyadestatic struct nfc_llc_engine *nfc_llc_name_to_engine(const char *name) 7767cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade{ 7867cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade struct nfc_llc_engine *llc_engine; 7967cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 8067cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade list_for_each_entry(llc_engine, &llc_engines, entry) { 8167cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade if (strcmp(llc_engine->name, name) == 0) 8267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade return llc_engine; 8367cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade } 8467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 8567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade return NULL; 8667cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade} 8767cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 8867cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyadevoid nfc_llc_unregister(const char *name) 8967cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade{ 9067cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade struct nfc_llc_engine *llc_engine; 9167cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 9267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade llc_engine = nfc_llc_name_to_engine(name); 9367cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade if (llc_engine == NULL) 9467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade return; 9567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 9667cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade list_del(&llc_engine->entry); 9767cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade kfree(llc_engine->name); 9867cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade kfree(llc_engine); 9967cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade} 10067cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 10167cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyadestruct nfc_llc *nfc_llc_allocate(const char *name, struct nfc_hci_dev *hdev, 10267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade xmit_to_drv_t xmit_to_drv, 10367cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade rcv_to_hci_t rcv_to_hci, int tx_headroom, 10467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade int tx_tailroom, llc_failure_t llc_failure) 10567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade{ 10667cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade struct nfc_llc_engine *llc_engine; 10767cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade struct nfc_llc *llc; 10867cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 10967cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade llc_engine = nfc_llc_name_to_engine(name); 11067cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade if (llc_engine == NULL) 11167cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade return NULL; 11267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 11367cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade llc = kzalloc(sizeof(struct nfc_llc), GFP_KERNEL); 11467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade if (llc == NULL) 11567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade return NULL; 11667cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 11767cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade llc->data = llc_engine->ops->init(hdev, xmit_to_drv, rcv_to_hci, 11867cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade tx_headroom, tx_tailroom, 11967cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade &llc->rx_headroom, &llc->rx_tailroom, 12067cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade llc_failure); 12167cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade if (llc->data == NULL) { 12267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade kfree(llc); 12367cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade return NULL; 12467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade } 12567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade llc->ops = llc_engine->ops; 12667cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 12767cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade return llc; 12867cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade} 12967cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 13067cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyadevoid nfc_llc_free(struct nfc_llc *llc) 13167cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade{ 13267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade llc->ops->deinit(llc); 13367cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade kfree(llc); 13467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade} 13567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 13667cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyadeinline void nfc_llc_get_rx_head_tail_room(struct nfc_llc *llc, int *rx_headroom, 13767cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade int *rx_tailroom) 13867cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade{ 13967cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade *rx_headroom = llc->rx_headroom; 14067cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade *rx_tailroom = llc->rx_tailroom; 14167cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade} 14267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 14367cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyadeinline int nfc_llc_start(struct nfc_llc *llc) 14467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade{ 14567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade return llc->ops->start(llc); 14667cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade} 14767cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 14867cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyadeinline int nfc_llc_stop(struct nfc_llc *llc) 14967cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade{ 15067cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade return llc->ops->stop(llc); 15167cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade} 15267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 15367cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyadeinline void nfc_llc_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb) 15467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade{ 15567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade llc->ops->rcv_from_drv(llc, skb); 15667cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade} 15767cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 15867cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyadeinline int nfc_llc_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb) 15967cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade{ 16067cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade return llc->ops->xmit_from_hci(llc, skb); 16167cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade} 16267cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade 16367cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyadeinline void *nfc_llc_get_data(struct nfc_llc *llc) 16467cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade{ 16567cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade return llc->data; 16667cccfe17d1b3da1ed6c79e643c9be95ebde9642Eric Lapuyade} 167