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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 <string.h>
#include <endian.h>
#include <errno.h>
#include "libsbefifo.h"
#include "sbefifo_private.h"
static int sbefifo_control_fast_array_push(uint16_t target_type, uint8_t chiplet_id, uint8_t mode, uint64_t clock_cycle, uint8_t **buf, uint32_t *buflen)
{
uint32_t *msg;
uint32_t nwords, cmd;
uint32_t target;
nwords = 5;
*buflen = nwords * sizeof(uint32_t);
msg = malloc(*buflen);
if (!msg)
return ENOMEM;
cmd = SBEFIFO_CMD_CLASS_ARRAY | SBEFIFO_CMD_FAST_ARRAY;
target = ((uint32_t)target_type << 16) |
((uint32_t)chiplet_id << 8) |
((uint32_t)(mode & 0x3));
msg[0] = htobe32(nwords);
msg[1] = htobe32(cmd);
msg[2] = htobe32(target);
msg[3] = htobe32(clock_cycle >> 32);
msg[4] = htobe32(clock_cycle & 0xffffffff);
*buf = (uint8_t *)msg;
return 0;
}
static int sbefifo_control_fast_array_pull(uint8_t *buf, uint32_t buflen)
{
if (buflen != 0)
return EPROTO;
return 0;
}
int sbefifo_control_fast_array(struct sbefifo_context *sctx, uint16_t target_type, uint8_t chiplet_id, uint8_t mode, uint64_t clock_cycle)
{
uint8_t *msg, *out;
uint32_t msg_len, out_len;
int rc;
rc = sbefifo_control_fast_array_push(target_type, chiplet_id, mode, clock_cycle, &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_control_fast_array_pull(out, out_len);
if (out)
free(out);
return rc;
}
static int sbefifo_control_trace_array_push(uint16_t target_type, uint8_t chiplet_id, uint16_t array_id, uint16_t operation, uint8_t **buf, uint32_t *buflen)
{
uint32_t *msg;
uint32_t nwords, cmd;
uint32_t target, oper;
nwords = 4;
*buflen = nwords * sizeof(uint32_t);
msg = malloc(*buflen);
if (!msg)
return ENOMEM;
cmd = SBEFIFO_CMD_CLASS_ARRAY | SBEFIFO_CMD_TRACE_ARRAY;
target = ((uint32_t)target_type << 16) | ((uint32_t)chiplet_id);
oper = ((uint32_t)array_id << 16) | ((uint32_t)operation);
msg[0] = htobe32(nwords);
msg[1] = htobe32(cmd);
msg[2] = htobe32(target);
msg[3] = htobe32(oper);
*buf = (uint8_t *)msg;
return 0;
}
static int sbefifo_control_trace_array_pull(uint8_t *buf, uint32_t buflen, uint8_t **trace_data, uint32_t *trace_data_len)
{
if (buflen < 4)
return EPROTO;
*trace_data_len = 4 * be32toh(*(uint32_t *) &buf[buflen-4]);
if (buflen != *trace_data_len + 4)
return EPROTO;
*trace_data = malloc(*trace_data_len);
if (! *trace_data)
return ENOMEM;
memcpy(*trace_data, buf, *trace_data_len);
return 0;
}
int sbefifo_control_trace_array(struct sbefifo_context *sctx, uint16_t target_type, uint8_t chiplet_id, uint16_t array_id, uint16_t operation, uint8_t **trace_data, uint32_t *trace_data_len)
{
uint8_t *msg, *out;
uint32_t msg_len, out_len;
int rc;
rc = sbefifo_control_trace_array_push(target_type, chiplet_id, array_id, operation, &msg, &msg_len);
if (rc)
return rc;
rc = sbefifo_set_long_timeout(sctx);
if (rc) {
free(msg);
return rc;
}
/* The size of returned data is just a guess */
out_len = 16 * sizeof(uint32_t);
rc = sbefifo_operation(sctx, msg, msg_len, &out, &out_len);
sbefifo_reset_timeout(sctx);
free(msg);
if (rc)
return rc;
rc = sbefifo_control_trace_array_pull(out, out_len, trace_data, trace_data_len);
if (out)
free(out);
return rc;
}
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