inc/listener_buf.h

/**
 * Copyright (c) 2019, The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *    * Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *    * Redistributions in binary form must reproduce the above
 *      copyright notice, this list of conditions and the following
 *      disclaimer in the documentation and/or other materials provided
 *      with the distribution.
 *    * Neither the name of The Linux Foundation nor the names of its
 *      contributors may be used to endorse or promote products derived
 *      from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef LISTENER_BUF_H
#define LISTENER_BUF_H

#include "sbuf.h"
#include "remote.h"
#include "verify.h"

static __inline void pack_in_bufs(struct sbuf* buf, remote_arg* pra, int nBufs) {
   int ii;
   uint32_t len;
   C_ASSERT(sizeof(len) == 4);
   for(ii = 0; ii < nBufs; ++ii) {
      len = (uint32_t)pra[ii].buf.nLen;
      sbuf_write(buf, (uint8*)&len, 4);
      if(len) {
         sbuf_align(buf, 8);
         sbuf_write(buf, pra[ii].buf.pv, len);
      }
   }
}

static __inline void pack_out_lens(struct sbuf* buf, remote_arg* pra, int nBufs) {
   int ii;
   uint32_t len;
   C_ASSERT(sizeof(len) == 4);
   for(ii = 0; ii < nBufs; ++ii) {
      len = (uint32_t)pra[ii].buf.nLen;
      sbuf_write(buf, (uint8*)&len, 4);
   }
}

static __inline void unpack_in_bufs(struct sbuf* buf, remote_arg* pra, int nBufs) {
   int ii;
   uint32_t len=0;
   C_ASSERT(sizeof(len) == 4);
   for(ii = 0; ii < nBufs; ++ii) {
      sbuf_read(buf, (uint8*)&len, 4);
      pra[ii].buf.nLen = len;
      if(pra[ii].buf.nLen) {
         sbuf_align(buf, 8);
         if((int)pra[ii].buf.nLen <= sbuf_left(buf)) {
            pra[ii].buf.pv = sbuf_head(buf);
         }
         sbuf_advance(buf, pra[ii].buf.nLen);
      }
   }
}

static __inline void unpack_out_lens(struct sbuf* buf, remote_arg* pra, int nBufs) {
   int ii;
   uint32_t len=0;
   C_ASSERT(sizeof(len) == 4);
   for(ii = 0; ii < nBufs; ++ii) {
      sbuf_read(buf, (uint8*)&len, 4);
      pra[ii].buf.nLen = len;
   }
}

//map out buffers on the hlos side to the remote_arg array
//dst is the space required for buffers we coun't map from the adsp
static __inline void pack_out_bufs(struct sbuf* buf, remote_arg* pra, int nBufs) {
   int ii;
   uint32_t len;
   C_ASSERT(sizeof(len) == 4);
   for(ii = 0; ii < nBufs; ++ii) {
      len = (uint32_t)pra[ii].buf.nLen;
      sbuf_write(buf, (uint8*)&len, 4);
      if(pra[ii].buf.nLen) {
         sbuf_align(buf, 8);
         if((int)pra[ii].buf.nLen <= sbuf_left(buf)) {
            pra[ii].buf.pv = sbuf_head(buf);
         }
         sbuf_advance(buf, pra[ii].buf.nLen);
      }
   }
}

//on the aDSP copy the data from buffers we had to copy to the local remote_arg structure
static __inline int unpack_out_bufs(struct sbuf* buf, remote_arg* pra, int nBufs) {
   int ii, nErr = 0;
   uint32_t len;
   C_ASSERT(sizeof(len) == 4);
   for(ii = 0; ii < nBufs; ++ii) {
      sbuf_read(buf, (uint8*)&len, 4);
      VERIFY(len == pra[ii].buf.nLen);
      if(pra[ii].buf.nLen) {
         sbuf_align(buf, 8);
         sbuf_read(buf, pra[ii].buf.pv, pra[ii].buf.nLen);
      }
   }
bail:
   return nErr;
}

#endif