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/*
* msg.c
*
* DSP-BIOS Bridge driver support functions for TI OMAP processors.
*
* DSP/BIOS Bridge msg_ctrl Module.
*
* Copyright (C) 2005-2006 Texas Instruments, Inc.
*
* This package is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include <linux/types.h>
/* ----------------------------------- Host OS */
#include <dspbridge/host_os.h>
/* ----------------------------------- DSP/BIOS Bridge */
#include <dspbridge/dbdefs.h>
/* ----------------------------------- Trace & Debug */
#include <dspbridge/dbc.h>
/* ----------------------------------- Bridge Driver */
#include <dspbridge/dspdefs.h>
/* ----------------------------------- Platform Manager */
#include <dspbridge/dev.h>
/* ----------------------------------- This */
#include <msgobj.h>
#include <dspbridge/msg.h>
/* ----------------------------------- Globals */
static u32 refs; /* module reference count */
/*
* ======== msg_create ========
* Purpose:
* Create an object to manage message queues. Only one of these objects
* can exist per device object.
*/
int msg_create(struct msg_mgr **msg_man,
struct dev_object *hdev_obj, msg_onexit msg_callback)
{
struct bridge_drv_interface *intf_fxns;
struct msg_mgr_ *msg_mgr_obj;
struct msg_mgr *hmsg_mgr;
int status = 0;
DBC_REQUIRE(refs > 0);
DBC_REQUIRE(msg_man != NULL);
DBC_REQUIRE(msg_callback != NULL);
DBC_REQUIRE(hdev_obj != NULL);
*msg_man = NULL;
dev_get_intf_fxns(hdev_obj, &intf_fxns);
/* Let Bridge message module finish the create: */
status =
(*intf_fxns->pfn_msg_create) (&hmsg_mgr, hdev_obj, msg_callback);
if (!status) {
/* Fill in DSP API message module's fields of the msg_mgr
* structure */
msg_mgr_obj = (struct msg_mgr_ *)hmsg_mgr;
msg_mgr_obj->intf_fxns = intf_fxns;
/* Finally, return the new message manager handle: */
*msg_man = hmsg_mgr;
} else {
status = -EPERM;
}
return status;
}
/*
* ======== msg_delete ========
* Purpose:
* Delete a msg_ctrl manager allocated in msg_create().
*/
void msg_delete(struct msg_mgr *hmsg_mgr)
{
struct msg_mgr_ *msg_mgr_obj = (struct msg_mgr_ *)hmsg_mgr;
struct bridge_drv_interface *intf_fxns;
DBC_REQUIRE(refs > 0);
if (msg_mgr_obj) {
intf_fxns = msg_mgr_obj->intf_fxns;
/* Let Bridge message module destroy the msg_mgr: */
(*intf_fxns->pfn_msg_delete) (hmsg_mgr);
} else {
dev_dbg(bridge, "%s: Error hmsg_mgr handle: %p\n",
__func__, hmsg_mgr);
}
}
/*
* ======== msg_exit ========
*/
void msg_exit(void)
{
DBC_REQUIRE(refs > 0);
refs--;
DBC_ENSURE(refs >= 0);
}
/*
* ======== msg_mod_init ========
*/
bool msg_mod_init(void)
{
DBC_REQUIRE(refs >= 0);
refs++;
DBC_ENSURE(refs >= 0);
return true;
}
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