// SPDX-License-Identifier: GPL-2.0-only
/*
 *  Copyright (C) 2017 Chelsio Communications.  All rights reserved.
 */

#include "cxgb4.h"
#include "cudbg_if.h"
#include "cudbg_lib_common.h"

int cudbg_get_buff(struct cudbg_init *pdbg_init,
                   struct cudbg_buffer *pdbg_buff, u32 size,
                   struct cudbg_buffer *pin_buff)
{
        u32 offset;

        offset = pdbg_buff->offset;
        if (offset + size > pdbg_buff->size)
                return CUDBG_STATUS_NO_MEM;

        if (pdbg_init->compress_type != CUDBG_COMPRESSION_NONE) {
                if (size > pdbg_init->compress_buff_size)
                        return CUDBG_STATUS_NO_MEM;

                pin_buff->data = (char *)pdbg_init->compress_buff;
                pin_buff->offset = 0;
                pin_buff->size = size;
                return 0;
        }

        pin_buff->data = (char *)pdbg_buff->data + offset;
        pin_buff->offset = offset;
        pin_buff->size = size;
        return 0;
}

void cudbg_put_buff(struct cudbg_init *pdbg_init,
                    struct cudbg_buffer *pin_buff)
{
        /* Clear compression buffer for re-use */
        if (pdbg_init->compress_type != CUDBG_COMPRESSION_NONE)
                memset(pdbg_init->compress_buff, 0,
                       pdbg_init->compress_buff_size);

        pin_buff->data = NULL;
        pin_buff->offset = 0;
        pin_buff->size = 0;
}

void cudbg_update_buff(struct cudbg_buffer *pin_buff,
                       struct cudbg_buffer *pout_buff)
{
        /* We already write to buffer provided by ethool, so just
         * increment offset to next free space.
         */
        pout_buff->offset += pin_buff->size;
}