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/* Copyright 2019 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <endian.h>
#include <errno.h>
#include "libsbefifo.h"
#include "sbefifo_private.h"
static int sbefifo_istep_execute_push(uint8_t major, uint8_t minor, uint8_t **buf, uint32_t *buflen)
{
uint32_t *msg;
uint32_t nwords, cmd;
uint32_t step;
nwords = 3;
*buflen = nwords * sizeof(uint32_t);
msg = malloc(*buflen);
if (!msg)
return ENOMEM;
cmd = SBEFIFO_CMD_CLASS_CONTROL | SBEFIFO_CMD_EXECUTE_ISTEP;
step = ((uint32_t)major << 16) | (uint32_t)minor;
msg[0] = htobe32(nwords);
msg[1] = htobe32(cmd);
msg[2] = htobe32(step);
*buf = (uint8_t *)msg;
return 0;
}
static int sbefifo_istep_execute_pull(uint8_t *buf, uint32_t buflen)
{
if (buflen != 0)
return EPROTO;
return 0;
}
int sbefifo_istep_execute(struct sbefifo_context *sctx, uint8_t major, uint8_t minor)
{
uint8_t *msg, *out;
uint32_t msg_len, out_len;
int rc;
rc = sbefifo_istep_execute_push(major, minor, &msg, &msg_len);
if (rc)
return rc;
rc = sbefifo_set_long_timeout(sctx);
if (rc) {
free(msg);
return rc;
}
out_len = 0;
rc = sbefifo_operation(sctx, msg, msg_len, &out, &out_len);
sbefifo_reset_timeout(sctx);
free(msg);
if (rc)
return rc;
rc = sbefifo_istep_execute_pull(out, out_len);
if (out)
free(out);
return rc;
}
static int sbefifo_suspend_io_push(uint8_t **buf, uint32_t *buflen)
{
uint32_t *msg;
uint32_t nwords, cmd;
nwords = 2;
*buflen = nwords * sizeof(uint32_t);
msg = malloc(*buflen);
if (!msg)
return ENOMEM;
cmd = SBEFIFO_CMD_CLASS_CONTROL | SBEFIFO_CMD_SUSPEND_IO;
msg[0] = htobe32(nwords);
msg[1] = htobe32(cmd);
*buf = (uint8_t *)msg;
return 0;
}
static int sbefifo_suspend_io_pull(uint8_t *buf, uint32_t buflen)
{
if (buflen != 0)
return EPROTO;
return 0;
}
int sbefifo_suspend_io(struct sbefifo_context *sctx)
{
uint8_t *msg, *out;
uint32_t msg_len, out_len;
int rc;
rc = sbefifo_suspend_io_push(&msg, &msg_len);
if (rc)
return rc;
out_len = 0;
rc = sbefifo_operation(sctx, msg, msg_len, &out, &out_len);
free(msg);
if (rc)
return rc;
rc = sbefifo_suspend_io_pull(out, out_len);
if (out)
free(out);
return rc;
}
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