/*******************************************************************************
Copyright (C) Marvell International Ltd. and its affiliates

This software file (the "File") is owned and distributed by Marvell
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File under one of the following license alternatives, please (i) delete this
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********************************************************************************
Marvell GPL License Option

If you received this File from Marvell, you may opt to use, redistribute and/or
modify this File in accordance with the terms and conditions of the General
Public License Version 2, June 1991 (the "GPL License"), a copy of which is
available along with the File in the license.txt file or by writing to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 or
on the worldwide web at http://www.gnu.org/licenses/gpl.txt.

THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY
DISCLAIMED.  The GPL License provides additional details about this warranty
disclaimer.
*******************************************************************************/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/capability.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>

#include "gbe/mvNeta.h"
#include "bm/mvBm.h"

#include "net_dev/mv_netdev.h"

static MV_BM_POOL	hwfBmPool[MV_BM_POOLS];


static int mv_eth_hwf_pool_add(MV_BM_POOL *pBmPool, int bufNum)
{
	int      i;
	void     *pVirt;
	MV_ULONG physAddr;

	/* Check total number of buffers doesn't exceed capacity */
	if ((bufNum < 0) ||
		((bufNum + pBmPool->bufNum) > (pBmPool->capacity))) {

		mvOsPrintf("%s: to many %d buffers for BM pool #%d: capacity=%d, buf_num=%d\n",
			   __func__, bufNum, pBmPool->pool, pBmPool->capacity, pBmPool->bufNum);
		return 0;
	}
	/* Allocate buffers for the pool */
	for (i = 0; i < bufNum; i++) {

		pVirt = mvOsIoCachedMalloc(NULL, pBmPool->bufSize, &physAddr, NULL);
		if (pVirt == NULL) {
			mvOsPrintf("%s: Warning! Not all buffers of %d bytes allocated\n",
						__func__, pBmPool->bufSize);
			break;
		}
		mvBmPoolPut(pBmPool->pool, (MV_ULONG) physAddr);
	}
	pBmPool->bufNum += i;

	mvOsPrintf("BM pool #%d for HWF: bufSize=%4d - %4d of %4d buffers added\n",
	       pBmPool->pool, pBmPool->bufSize, i, bufNum);

	return i;
}

/*******************************************************************************
 * mv_eth_hwf_bm_create - create BM pools used by the port for HWF only
 *
 * INPUT:
 *       int        port	- port number
 *
 * RETURN:   MV_STATUS
 *               MV_OK - Success, Others - Failure
 *
 *******************************************************************************/
MV_STATUS mv_eth_hwf_bm_create(int port, int mtuPktSize)
{
	static bool		isFirst = true;
	MV_BM_POOL		*pBmPool;
	int				long_pool, short_pool;
	int				long_buf_size, short_buf_size;

	/* Check validity of the parameters */
	if (mvNetaPortCheck(port))
		return MV_FAIL;

	/* For the first time - clean hwfBmPool array */
	if (isFirst == true) {
		memset(&hwfBmPool, 0, sizeof(hwfBmPool));
		isFirst = false;
	}

	long_pool = mv_eth_bm_config_long_pool_get(port);
	/* Check validity of the parameters */
	if (mvNetaMaxCheck(long_pool,  MV_BM_POOLS))
		return MV_FAIL;

	/* For HWF Packet offset in the packet is 8 bytes */
	long_buf_size = mv_eth_bm_config_pkt_size_get(long_pool);
	if (long_buf_size == 0)
		long_buf_size = mtuPktSize + 8;

	/* Check validity of the parameters */
	if (long_buf_size < (mtuPktSize + 8))
		return MV_FAIL;

	/* Create long pool */
	pBmPool = &hwfBmPool[long_pool];
	if (pBmPool->pVirt == NULL) {
		/* Allocate new pool */
		pBmPool->pVirt = mv_eth_bm_pool_create(long_pool, MV_BM_POOL_CAP_MAX, &pBmPool->physAddr);
		if (pBmPool->pVirt == NULL) {
			mvOsPrintf("%s: Can't allocate %d bytes for Long pool #%d of port #%d\n",
					__func__, MV_BM_POOL_CAP_MAX * sizeof(MV_U32), long_pool, port);
			return MV_OUT_OF_CPU_MEM;
		}
		pBmPool->pool = long_pool;
		pBmPool->capacity = MV_BM_POOL_CAP_MAX;
		pBmPool->bufSize = long_buf_size;
	} else {
		/* Share pool with other port - check buffer size */
		if (long_buf_size > pBmPool->bufSize) {
			/* The BM pool doesn't match the mtuPktSize */
			mvOsPrintf("%s: longBufSize=%d is too match for the pool #%d (%d bytes)\n",
						__func__, long_buf_size, pBmPool->pool, pBmPool->bufSize);
			return MV_FAIL;
		}
	}
	/* Set long pool buffer size */
	mvNetaBmPoolBufSizeSet(port, long_pool, long_buf_size);
	
	mv_eth_hwf_pool_add(pBmPool, mv_eth_bm_config_long_buf_num_get(port));

	/* Create short pool */
	short_pool = mv_eth_bm_config_short_pool_get(port);
	short_buf_size = mv_eth_bm_config_pkt_size_get(short_pool);
	if (short_pool != long_pool) {
		pBmPool = &hwfBmPool[short_pool];
		if (pBmPool->pVirt == NULL) {
			/* Allocate new pool */
			pBmPool->pVirt = mv_eth_bm_pool_create(short_pool, MV_BM_POOL_CAP_MAX, &pBmPool->physAddr);
			if (pBmPool->pVirt == NULL) {
				mvOsPrintf("%s: Can't allocate %d bytes for Short pool #%d of port #%d\n",
						__func__, MV_BM_POOL_CAP_MAX * sizeof(MV_U32), short_pool, port);
				return MV_OUT_OF_CPU_MEM;
			}
			pBmPool->pool = short_pool;
			pBmPool->capacity = MV_BM_POOL_CAP_MAX;
			pBmPool->bufSize = short_buf_size;
		} else {
			/* Share pool with other port - check buffer size */
			if (short_buf_size > pBmPool->bufSize) {
				/* The BM pool doesn't match the mtuPktSize */
				mvOsPrintf("%s: shortBufSize=%d is too match for the pool #%d (%d bytes)\n",
							__func__, short_buf_size, pBmPool->pool, pBmPool->bufSize);
				return MV_FAIL;
			}
		}
		/* Set short pool buffer size */
		mvNetaBmPoolBufSizeSet(port, short_pool, short_buf_size);		

		/* Add buffers to short pool */
		mv_eth_hwf_pool_add(pBmPool, mv_eth_bm_config_short_buf_num_get(port));
	}
	mvNetaHwfBmPoolsSet(port, short_pool, long_pool);
	return MV_OK;
}

void mv_hwf_bm_dump(void)
{
	int          i;
	MV_BM_POOL   *bmPool;

	mvOsPrintf("HWF BM Pools configuration\n");
	mvOsPrintf("pool:    capacity    bufSize    bufNum      virtPtr       physAddr\n");
	for (i = 0; i < MV_BM_POOLS; i++) {
		bmPool = &hwfBmPool[i];
		if (bmPool->pVirt)
			mvOsPrintf("  %2d:     %4d       %4d       %4d      %p      0x%08x\n",
						bmPool->pool, bmPool->capacity, bmPool->bufSize, bmPool->bufNum,
						bmPool->pVirt, (unsigned)bmPool->physAddr);
	}
}