diff options
Diffstat (limited to 'core/pldm/pldm-file-io-requests.c')
-rw-r--r-- | core/pldm/pldm-file-io-requests.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/core/pldm/pldm-file-io-requests.c b/core/pldm/pldm-file-io-requests.c new file mode 100644 index 0000000..11251a3 --- /dev/null +++ b/core/pldm/pldm-file-io-requests.c @@ -0,0 +1,156 @@ +// 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; +} |