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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_ring_get_push(uint32_t ring_addr, uint32_t ring_len_bits, uint16_t flags, uint8_t **buf, uint32_t *buflen)
{
uint32_t *msg;
uint32_t nwords, cmd;
nwords = 5;
*buflen = nwords * sizeof(uint32_t);
msg = malloc(*buflen);
if (!msg)
return ENOMEM;
cmd = SBEFIFO_CMD_CLASS_RING | SBEFIFO_CMD_GET_RING;
msg[0] = htobe32(nwords);
msg[1] = htobe32(cmd);
msg[2] = htobe32(ring_addr);
msg[3] = htobe32(ring_len_bits);
msg[4] = htobe32(flags);
*buf = (uint8_t *)msg;
return 0;
}
static int sbefifo_ring_get_pull(uint8_t *buf, uint32_t buflen, uint32_t ring_len_bits, uint8_t **ring_data, uint32_t *ring_len)
{
if (buflen*8 < ring_len_bits) {
return EPROTO;
}
*ring_len = be32toh(*(uint32_t *) &buf[buflen-4]);
*ring_data = malloc(*ring_len);
if (! *ring_data)
return ENOMEM;
memcpy(*ring_data, buf, *ring_len);
return 0;
}
int sbefifo_ring_get(struct sbefifo_context *sctx, uint32_t ring_addr, uint32_t ring_len_bits, uint16_t flags, uint8_t **ring_data, uint32_t *ring_len)
{
uint8_t *msg, *out;
uint32_t msg_len, out_len;
int rc;
rc = sbefifo_ring_get_push(ring_addr, ring_len_bits, flags, &msg, &msg_len);
if (rc)
return rc;
rc = sbefifo_set_long_timeout(sctx);
if (rc) {
free(msg);
return rc;
}
/* multiples of 64 bits */
out_len = (ring_len_bits + 63) / 8;
rc = sbefifo_operation(sctx, msg, msg_len, &out, &out_len);
sbefifo_reset_timeout(sctx);
free(msg);
if (rc)
return rc;
rc = sbefifo_ring_get_pull(out, out_len, ring_len_bits, ring_data, ring_len);
if (out)
free(out);
return rc;
}
static int sbefifo_ring_put_push(uint16_t ring_mode, uint8_t *ring_data, uint32_t ring_data_len, uint8_t **buf, uint32_t *buflen)
{
uint32_t *msg;
uint32_t nwords, cmd;
nwords = 3 + (ring_data_len + 3) / 4;
*buflen = nwords * sizeof(uint32_t);
msg = malloc(*buflen);
if (!msg)
return ENOMEM;
cmd = SBEFIFO_CMD_CLASS_RING | SBEFIFO_CMD_PUT_RING;
msg[0] = htobe32(nwords);
msg[1] = htobe32(cmd);
msg[2] = htobe32(ring_mode);
memcpy(&msg[3], ring_data, ring_data_len);
*buf = (uint8_t *)msg;
return 0;
}
static int sbefifo_ring_put_pull(uint8_t *buf, uint32_t buflen)
{
if (buflen != 0)
return EPROTO;
return 0;
}
int sbefifo_ring_put(struct sbefifo_context *sctx, uint16_t ring_mode, uint8_t *ring_data, uint32_t ring_data_len)
{
uint8_t *msg, *out;
uint32_t msg_len, out_len;
int rc;
rc = sbefifo_ring_put_push(ring_mode, ring_data, ring_data_len, &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_ring_put_pull(out, out_len);
if (out)
free(out);
return rc;
}
static int sbefifo_ring_put_from_image_push(uint16_t target, uint8_t chiplet_id, uint16_t ring_id, uint16_t ring_mode, uint8_t **buf, uint32_t *buflen)
{
uint32_t *msg;
uint32_t nwords, cmd;
uint32_t target_word, ring_word;
nwords = 4;
*buflen = nwords * sizeof(uint32_t);
msg = malloc(*buflen);
if (!msg)
return ENOMEM;
cmd = SBEFIFO_CMD_CLASS_RING | SBEFIFO_CMD_PUT_RING_IMAGE;
target_word = ((uint32_t)target << 16) | (uint32_t)chiplet_id;
ring_word = ((uint32_t)ring_id << 16) | (uint32_t)ring_mode;
msg[0] = htobe32(nwords);
msg[1] = htobe32(cmd);
msg[2] = htobe32(target_word);
msg[3] = htobe32(ring_word);
*buf = (uint8_t *)msg;
return 0;
}
static int sbefifo_ring_put_from_image_pull(uint8_t *buf, uint32_t buflen)
{
if (buflen != 0)
return EPROTO;
return 0;
}
int sbefifo_ring_put_from_image(struct sbefifo_context *sctx, uint16_t target, uint8_t chiplet_id, uint16_t ring_id, uint16_t ring_mode)
{
uint8_t *msg, *out;
uint32_t msg_len, out_len;
int rc;
if (sctx->proc != SBEFIFO_PROC_P9)
return ENOSYS;
rc = sbefifo_ring_put_from_image_push(target, chiplet_id, ring_id, ring_mode, &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(out);
if (rc)
return rc;
rc = sbefifo_ring_put_from_image_pull(out, out_len);
if (out)
free(out);
return rc;
}
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