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/*******************************************************************************
* Copyright (C) 2018 Cadence Design Systems, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to use this Software with Cadence processor cores only and
* not with any other processors and platforms, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
******************************************************************************/
/*******************************************************************************
* xf-msg.c
*
* Message/message pool handling
*
******************************************************************************/
#define MODULE_TAG MSG
/*******************************************************************************
* Includes
******************************************************************************/
#include "xf.h"
/*******************************************************************************
* Entry points
******************************************************************************/
/* ...allocate message pool */
int xf_msg_pool_init(xf_msg_pool_t *pool, u32 n, u32 core)
{
u32 i;
/* ...allocate shared memory from global pool */
XF_CHK_ERR(pool->p = xf_mem_alloc(XF_MM(sizeof(*pool->p) * n), XF_PROXY_ALIGNMENT, core, 1), -ENOMEM);
/* ...place all messages into single-liked list */
for (pool->head = &pool->p[i = 0]; i < n - 1; i++)
{
/* ...set message pointer to next message in the pool */
xf_msg_pool_item(pool, i)->next = xf_msg_pool_item(pool, i + 1);
}
/* ...set tail of the list */
xf_msg_pool_item(pool, i)->next = NULL;
/* ...save pool size */
pool->n = n;
return 0;
}
/* ...destroy memory pool */
void xf_msg_pool_destroy(xf_msg_pool_t *pool, u32 core)
{
/* ...release pool memory (from shared local-IPC memory) */
xf_mem_free(pool->p, XF_MM(sizeof(*pool->p) * pool->n), core, 1);
}
/* ...allocate message from a pool (no concurrent access from other cores) */
xf_message_t * xf_msg_pool_get(xf_msg_pool_t *pool)
{
__xf_message_t *_m;
/* ...pop message from the head of the pool */
XF_CHK_ERR(_m = pool->head, NULL);
/* ...advance list head */
pool->head = (__xf_message_t *)(((xf_message_t *) _m)->next);
/* ...debug - wipe out message "next" pointer */
((xf_message_t *) _m)->next = NULL;
/* ...return properly aligned message pointer */
return (xf_message_t *) _m;
}
/* ...return message back to the pool (no concurrent access from other cores) */
void xf_msg_pool_put(xf_msg_pool_t *pool, xf_message_t *m)
{
__xf_message_t *_m = (__xf_message_t *) m;
/* ...make sure the message is properly aligned object */
BUG(!XF_IS_ALIGNED(_m), _x("Corrupted message pointer: %p"), _m);
/* ...make sure it is returned to the same pool (need a length for that - tbd) */
BUG(!xf_msg_from_pool(pool, m) < 0, _x("Bad pool/message: %p/%p"), pool->p, _m);
/* ...place message into the head */
m->next = (xf_message_t *) pool->head;
/* ...advance pool head */
pool->head = _m;
}
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