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// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
// Copyright 2022 IBM Corp.
#define pr_fmt(fmt) "PLDM: " fmt
#include <opal.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include <libpldm/file_io.h>
#include "pldm.h"
/* list of lid files available */
static void *file_attr_table;
static size_t file_attr_length;
static bool file_io_ready;
static void file_io_init_complete(bool success)
{
/* Read not successful, error out and free the buffer */
if (!success) {
file_io_ready = false;
if (file_attr_table != NULL) {
free(file_attr_table);
file_attr_length = 0;
}
return;
}
/* Mark ready */
file_io_ready = true;
}
/*
* Send/receive a PLDM GetFileTable request message.
* The file table contains the list of files available and
* their attributes.
*
* Ex:
* {
* "FileHandle": "11",
* "FileNameLength": 12,
* "FileName": "81e0066b.lid",
* "FileSize": 589824,
* "FileTraits": 6
* },
*/
static int get_file_table_req(void)
{
size_t data_size = PLDM_MSG_SIZE(struct pldm_get_file_table_req);
size_t response_len, payload_len;
uint8_t file_table_data_start_offset;
uint8_t transfer_flag, completion_code;
struct pldm_tx_data *tx = NULL;
uint32_t next_transfer_handle;
void *response_msg;
int rc = OPAL_SUCCESS;
struct pldm_get_file_table_req file_table_req = {
.transfer_handle = 0, /* (0 if operation op is FIRSTPART) */
.operation_flag = PLDM_GET_FIRSTPART,
.table_type = PLDM_FILE_ATTRIBUTE_TABLE,
};
prlog(PR_DEBUG, "%s - GetFileReq\n", __func__);
/* Encode the file table request */
tx = zalloc(sizeof(struct pldm_tx_data) + data_size);
if (!tx)
return OPAL_NO_MEM;
tx->data_size = data_size;
rc = encode_get_file_table_req(
DEFAULT_INSTANCE_ID,
file_table_req.transfer_handle,
file_table_req.operation_flag,
file_table_req.table_type,
(struct pldm_msg *)tx->data);
if (rc != PLDM_SUCCESS) {
prlog(PR_ERR, "Encode GetFileReq Error, rc: %d\n", rc);
free(tx);
return OPAL_PARAMETER;
}
/* Send and get the response message bytes */
rc = pldm_requester_queue_and_wait(tx,
&response_msg, &response_len);
if (rc) {
prlog(PR_ERR, "Communication Error, req: GetFileReq, rc: %d\n", rc);
free(tx);
return rc;
}
/* Decode the message */
payload_len = response_len - sizeof(struct pldm_msg_hdr);
rc = decode_get_file_table_resp(
response_msg,
payload_len,
&completion_code,
&next_transfer_handle,
&transfer_flag,
&file_table_data_start_offset,
&file_attr_length);
if (rc != PLDM_SUCCESS || completion_code != PLDM_SUCCESS) {
prlog(PR_ERR, "Decode GetFileResp Error, rc: %d, cc: %d\n",
rc, completion_code);
rc = OPAL_PARAMETER;
goto out;
}
/* we do not support multipart transfer */
if ((next_transfer_handle != PLDM_GET_NEXTPART) ||
(transfer_flag != PLDM_START_AND_END)) {
prlog(PR_ERR, "Transfert GetFileResp not complete, "
"transfer_hndl: %d, transfer_flag: %d\n",
next_transfer_handle,
transfer_flag);
}
file_attr_table = zalloc(file_attr_length);
if (!file_attr_table) {
rc = OPAL_NO_MEM;
goto out;
}
memcpy(file_attr_table,
((struct pldm_msg *)response_msg)->payload +
file_table_data_start_offset,
file_attr_length);
out:
free(tx);
free(response_msg);
return rc;
}
int pldm_file_io_init(void)
{
int rc;
/* PLDM GetFileTable request */
rc = get_file_table_req();
if (rc)
goto err;
file_io_init_complete(true);
prlog(PR_DEBUG, "%s - done\n", __func__);
return OPAL_SUCCESS;
err:
file_io_init_complete(false);
return rc;
}
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