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support multiple clients; guard against clients vanishing

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1634 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Mark D. Studebaker committed 2002-11-21 01:32:35 +00:00
1 parent 6e54291649
commit 5d2f13b9c3
1 file changed
+38 -10
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kernel/busses/i2c-ipmi.c
+38 -10
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@@ -109,9 +109,19 @@ static u32 i2c_ipmi_func(struct i2c_adapter *adapter)
/************** Message Sending **************/
static int find_client(struct i2c_client * client)
{
int i;
for (i = 0; i < I2C_CLIENT_MAX; i++)
if (client == i2c_ipmi_adapter.clients[i])
return i;
return -1;
}
static void ipmi_i2c_send_message(int id, struct ipmi_msg * msg)
{
ipmi_request(i2c_ipmi_user, &address, id, msg, 0);
ipmi_request(i2c_ipmi_user, &address, (long) id, msg, 0);
}
/* This is the message send function exported to the client
@@ -123,10 +133,21 @@ static int bmcclient_i2c_send_message(struct i2c_adapter *clnt,
{
struct ipmi_msg *msg = (struct ipmi_msg *) mesg;
struct i2c_client *client = (struct i2c_client *) clnt;
int clientid;
#ifdef DEBUG
if(msg->data == NULL)
printk(KERN_INFO "i2c-ipmi.o: Send 0x%x\n", msg->cmd);
else
printk(KERN_INFO "i2c-ipmi.o: Send 0x%x 0x%x 0x%x\n", msg->cmd, msg->data[0], msg->data[1]);
#endif
/* save the client number in the upper 8 bits of the message id */
if((clientid = find_client(client)) < 0) {
printk(KERN_WARNING "i2c-ipmi.o: Request from unknown client\n");
return -1;
}
/* todo: keep track of multiple clients and save callback for each */
id = (id & 0xffffff) | 0x1000000;
rcv_callback = client->driver->command;
id = (id & 0xffffff) | (clientid << 24);
ipmi_i2c_send_message(id, msg);
return 0;
}
@@ -137,18 +158,25 @@ static void ipmi_i2c_msg_handler(struct ipmi_recv_msg *msg,
void *handler_data)
{
int rcvid = msg->msgid & 0xffffff;
int client = (msg->msgid >> 24) & 0xf;
int clientid = (msg->msgid >> 24) & 0xff;
#ifdef DEBUG
if (msg->msg.data[0] != 0)
printk(KERN_WARNING "IPMI BMC response: Error 0x%x on cmd 0x%x/0x%x\n",
printk(KERN_WARNING "i2c-ipmi.o: Error 0x%x on cmd 0x%x/0x%x\n",
msg->msg.data[0], msg->msg.netfn, msg->msg.cmd);
#endif
/* todo: keep track of multiple clients */
if(client == 1 && rcv_callback != NULL)
(*rcv_callback)(NULL, client, msg);
else
/* Protect ourselves here; verify the client and its callback
since the client may have gone away since
the message was sent! */
if(clientid < I2C_CLIENT_MAX &&
i2c_ipmi_adapter.clients[clientid] != NULL &&
i2c_ipmi_adapter.clients[clientid]->driver->command != NULL)
(* i2c_ipmi_adapter.clients[clientid]->driver->command)
(i2c_ipmi_adapter.clients[clientid], rcvid, msg);
else {
printk(KERN_WARNING "i2c-ipmi.o: Response for unknown client\n");
ipmi_free_recv_msg(msg);
}
}
static struct ipmi_user_hndl ipmi_hndlrs =