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* DSP-BIOS Bridge driver support functions for TI OMAP processors.
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* Private header file defining msg_ctrl manager objects and defines needed
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* Copyright (C) 2005-2006 Texas Instruments, Inc.
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* This package is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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* THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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#include <linux/list.h>
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#include <dspbridge/msgdefs.h>
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* These target side symbols define the beginning and ending addresses
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* of the section of shared memory used for messages. They are
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* defined in the *cfg.cmd file by cdb code.
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#define MSG_SHARED_BUFFER_BASE_SYM "_MSG_BEG"
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#define MSG_SHARED_BUFFER_LIMIT_SYM "_MSG_END"
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#ifndef _CHNL_WORDSIZE
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#define _CHNL_WORDSIZE 4 /* default _CHNL_WORDSIZE is 2 bytes/word */
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* ======== msg_ctrl ========
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* There is a control structure for messages to the DSP, and a control
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* structure for messages from the DSP. The shared memory region for
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* transferring messages is partitioned as follows:
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* ----------------------------------------------------------
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* |Control | Messages from DSP | Control | Messages to DSP |
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* ----------------------------------------------------------
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* msg_ctrl control structure for messages to the DSP is used in the following
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* buf_empty - This flag is set to FALSE by the GPP after it has output
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* messages for the DSP. The DSP host driver sets it to
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* TRUE after it has copied the messages.
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* post_swi - Set to 1 by the GPP after it has written the messages,
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* set the size, and set buf_empty to FALSE.
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* The DSP Host driver uses SWI_andn of the post_swi field
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* when a host interrupt occurs. The host driver clears
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* this after posting the SWI.
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* size - Number of messages to be read by the DSP.
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* For messages from the DSP:
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* buf_empty - This flag is set to FALSE by the DSP after it has output
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* messages for the GPP. The DPC on the GPP sets it to
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* TRUE after it has copied the messages.
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* post_swi - Set to 1 the DPC on the GPP after copying the messages.
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* size - Number of messages to be read by the GPP.
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u32 buf_empty; /* to/from DSP buffer is empty */
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u32 post_swi; /* Set to "1" to post msg_ctrl SWI */
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u32 size; /* Number of messages to/from the DSP */
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* ======== msg_mgr ========
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* The msg_mgr maintains a list of all MSG_QUEUEs. Each NODE object can
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* have msg_queue to hold all messages that come up from the corresponding
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* node on the DSP. The msg_mgr also has a shared queue of messages
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* ready to go to the DSP.
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/* The first field must match that in msgobj.h */
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/* Function interface to Bridge driver */
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struct bridge_drv_interface *intf_fxns;
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struct io_mgr *iomgr; /* IO manager */
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struct list_head queue_list; /* List of MSG_QUEUEs */
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spinlock_t msg_mgr_lock; /* For critical sections */
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/* Signalled when MsgFrame is available */
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struct sync_object *sync_event;
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struct list_head msg_free_list; /* Free MsgFrames ready to be filled */
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struct list_head msg_used_list; /* MsgFrames ready to go to DSP */
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u32 msgs_pending; /* # of queued messages to go to DSP */
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u32 max_msgs; /* Max # of msgs that fit in buffer */
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msg_onexit on_exit; /* called when RMS_EXIT is received */
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* ======== msg_queue ========
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* Each NODE has a msg_queue for receiving messages from the
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* corresponding node on the DSP. The msg_queue object maintains a list
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* of messages that have been sent to the host, but not yet read (MSG_Get),
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* and a list of free frames that can be filled when new messages arrive
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* The msg_queue's hSynEvent gets posted when a message is ready.
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struct list_head list_elem;
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struct msg_mgr *msg_mgr;
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u32 max_msgs; /* Node message depth */
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u32 msgq_id; /* Node environment pointer */
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struct list_head msg_free_list; /* Free MsgFrames ready to be filled */
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/* Filled MsgFramess waiting to be read */
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struct list_head msg_used_list;
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void *arg; /* Handle passed to mgr on_exit callback */
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struct sync_object *sync_event; /* Signalled when message is ready */
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struct sync_object *sync_done; /* For synchronizing cleanup */
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struct sync_object *sync_done_ack; /* For synchronizing cleanup */
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struct ntfy_object *ntfy_obj; /* For notification of message ready */
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bool done; /* TRUE <==> deleting the object */
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u32 io_msg_pend; /* Number of pending MSG_get/put calls */
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* ======== msg_dspmsg ========
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u32 msgq_id; /* Identifies the node the message goes to */
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* ======== msg_frame ========
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struct list_head list_elem;
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struct msg_dspmsg msg_data;
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#endif /* _MSG_SM_ */