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
IPCKernelInit(TI_HANDLE hAdapter,TI_HANDLE hIPCEv)54 TI_UINT32 IPCKernelInit (TI_HANDLE hAdapter,TI_HANDLE hIPCEv)
55 {
56 return 0;
57 }
58
IPCKernelDeInit(TI_HANDLE hAdapter)59 TI_UINT32 IPCKernelDeInit (TI_HANDLE hAdapter)
60 {
61 return 0;
62 }
63
64
65 /*******************************************************/
IPC_EventSend(TI_HANDLE hAdapter,TI_UINT8 * pEvData,TI_UINT32 EvDataSize)66 TI_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
119 nlmsg_failure:
120 ti_dprintf(TIWLAN_LOG_INFO,"IPC kernel: did not send the netlink message\n");
121 return -1;
122 }
123