1/*
2 * ipc_k.c
3 *
4 * Copyright(c) 1998 - 2009 Texas Instruments. All rights reserved.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 *  * Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 *  * Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in
15 *    the documentation and/or other materials provided with the
16 *    distribution.
17 *  * Neither the name Texas Instruments nor the names of its
18 *    contributors may be used to endorse or promote products derived
19 *    from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34
35/*
36 * src/ipc_k.c
37 *
38 */
39
40#include <linux/module.h>
41#include <linux/kernel.h>
42#include <linux/stddef.h>
43#include <linux/netdevice.h>
44#include <linux/rtnetlink.h>
45#include <linux/netlink.h>
46
47#include "tidef.h"
48#include "WlanDrvIf.h"
49#include "osApi.h"
50#include "ioctl_init.h"
51#include "cli_cu_common.h"
52#include "TI_IPC_Api.h"
53
54TI_UINT32 IPCKernelInit    (TI_HANDLE hAdapter,TI_HANDLE  hIPCEv)
55{
56    return 0;
57}
58
59TI_UINT32 IPCKernelDeInit  (TI_HANDLE hAdapter)
60{
61    return 0;
62}
63
64
65/*******************************************************/
66TI_INT32 IPC_EventSend(TI_HANDLE hAdapter, TI_UINT8* pEvData, TI_UINT32 EvDataSize)
67{
68	struct sk_buff *skb;
69	int res;
70	TWlanDrvIfObj *drv = (TWlanDrvIfObj *) hAdapter;
71	TI_UINT32 realSize = 0;
72	TI_UINT32 msgSize;
73	struct nlmsghdr *nlh;
74	TI_UINT8 *msg;
75
76	os_wake_lock_timeout_enable(drv);
77	/* This event is targetted to the OS process Id 0 is not a valid pId for LINUX*/
78	if (((IPC_EVENT_PARAMS *)pEvData)->uProcessID == 0)
79	{
80		((IPC_EVENT_PARAMS *)pEvData)->pfEventCallback(( IPC_EV_DATA *)pEvData);
81		return 0;
82	}
83
84	/* set the payload size */
85	msgSize = (( IPC_EV_DATA *) pEvData) ->uBufferSize + offsetof(IPC_EV_DATA,uBuffer);
86
87	/* add the netlink header size */
88	realSize = NLMSG_SPACE(msgSize);
89
90	/* allocate the complete message */
91	skb = dev_alloc_skb(realSize);
92	if (!skb) {
93		printk(KERN_ERR "Failed to allocate new skb with size=%u.\n",realSize);
94		return -1;
95	}
96
97	/* set the netlink header params */
98	nlh = NLMSG_PUT(skb, 0, 0, NLMSG_DONE, realSize - sizeof(*nlh));
99
100	/* get the payload pointer */
101	msg = (char *)NLMSG_DATA(nlh);
102
103	/* copy the data to the payload */
104	memcpy(msg,pEvData,msgSize);
105
106	NETLINK_CB(skb).pid = 0;   /* from kernel */
107#define RTMGRP_LINK 1
108	NETLINK_CB(skb).dst_group = RTMGRP_LINK;
109
110	/* send the message*/
111	res = netlink_unicast(drv->wl_sock, skb, (( IPC_EVENT_PARAMS *) pEvData) ->uProcessID, MSG_DONTWAIT);
112
113	/* Sanity checks. As far as we're concerned this error is unrecovarable.*/
114	if (res >= 0)
115	{
116		return 0;
117	}
118
119nlmsg_failure:
120	ti_dprintf(TIWLAN_LOG_INFO,"IPC kernel: did not send the netlink message\n");
121	return -1;
122}
123