@@ -34,6 +34,82 @@ static void file_io_init_complete(bool success)
file_io_ready = true;
}
+#define CHKSUM_PADDING 8
+
+/*
+ * Retrieve the file handle and file length from the file attribute
+ * table.
+ */
+static int find_file_handle_by_lid_id(const char *lid_id,
+ uint32_t *file_handle,
+ uint32_t *file_length)
+{
+ const struct pldm_file_attr_table_entry *file_entry;
+ char *startptr, *endptr;
+ uint16_t file_name_length;
+
+ if ((file_attr_table == NULL) || (file_attr_length == 0))
+ return OPAL_HARDWARE;
+
+ startptr = (char *)file_attr_table;
+ endptr = startptr + file_attr_length - CHKSUM_PADDING;
+ *file_handle = 0;
+ *file_length = 0;
+
+ while (startptr < endptr) {
+ /* file entry:
+ * 4 Bytes: file handle
+ * 2 Bytes: file name length
+ * <file name length> Bytes: file name
+ * 4 Bytes: file length
+ */
+ file_entry = (struct pldm_file_attr_table_entry *)startptr;
+
+ *file_handle = le32_to_cpu(file_entry->file_handle);
+ startptr += sizeof(uint32_t);
+
+ file_name_length = le16_to_cpu(file_entry->file_name_length);
+ startptr += sizeof(file_name_length);
+
+ if (!strncmp(startptr, lid_id, strlen(lid_id))) {
+ startptr += file_name_length;
+ *file_length = le32_to_cpu(*(uint32_t *)startptr);
+ break;
+ }
+ startptr += file_name_length;
+ startptr += sizeof(uint32_t);
+ startptr += sizeof(bitfield32_t);
+ }
+
+ if (*file_length == 0) {
+ prlog(PR_ERR, "%s - lid_id: %s, no file handle found\n",
+ __func__, lid_id);
+ *file_handle = 0xff;
+ *file_length = 0;
+ return OPAL_PARAMETER;
+ }
+
+ prlog(PR_DEBUG, "%s - lid_id: %s, file_handle: %d, file_length: %d\n",
+ __func__, lid_id, *file_handle, *file_length);
+
+ return OPAL_SUCCESS;
+}
+
+/*
+ * Retrieve the file handle and file length based on lid id.
+ */
+int pldm_find_file_handle_by_lid_id(const char *lid_id,
+ uint32_t *file_handle,
+ uint32_t *file_length)
+{
+ if (!file_io_ready)
+ return OPAL_HARDWARE;
+
+ return find_file_handle_by_lid_id(lid_id,
+ file_handle,
+ file_length);
+}
+
/* maximum currently transfer size for PLDM */
#define KILOBYTE 1024ul
#define MAX_TRANSFER_SIZE_BYTES (127 * KILOBYTE)
@@ -52,6 +52,9 @@ int pldm_responder_handle_request(struct pldm_rx_data *rx);
int pldm_responder_init(void);
/* Requester support */
+int pldm_find_file_handle_by_lid_id(const char *lid_id,
+ uint32_t *file_handle,
+ uint32_t *file_length);
int pldm_file_io_read_file(uint32_t file_handle, uint32_t file_length,
uint32_t pos, void *buf, uint64_t len);
int pldm_file_io_write_file(uint32_t file_handle, uint32_t pos,