core/pldm: Decode the GetFRURecordTableMetadata request

The GetFRURecordTableMetadata command is used to get the FRU Record
Table metadata information that includes the FRU Record major version,
the FRU Record minor version, the size of the largest FRU Record data,
total length of the FRU Record Table, total number of FRU Record Data
structures, and the integrity checksum on the FRU Record Table data.

Add an "IBM, skiboot" FRU Record product requested by the BMC.

Signed-off-by: Christophe Lombard <clombard@linux.ibm.com>
Signed-off-by: Reza Arbab <arbab@linux.ibm.com>

1 files changed, 96 insertions, 0 deletions

diff --git a/core/pldm/pldm-responder.c b/core/pldm/pldm-responder.c
index 3eba2e9..3ab813f 100644
--- a/core/pldm/pldm-responder.c
+++ b/core/pldm/pldm-responder.c
@@ -10,6 +10,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <debug_descriptor.h>
+#include <libpldm/fru.h>
 #include <libpldm/platform.h>
 #include <libpldm/platform_oem_ibm.h>
 #include <libpldm/state_set.h>
@@ -946,6 +947,97 @@ static struct pldm_cmd pldm_platform_get_pdr = {
 	.handler = platform_get_pdr_handle,
 };
 
+/*
+ * PLDM Fru commands support
+ */
+static struct pldm_type pldm_fru_type = {
+	.name = "fru",
+	.pldm_type_id = PLDM_FRU,
+};
+
+/* currently we support version 1.0 of fru table */
+#define SUPPORTED_FRU_VERSION_MAJOR 1
+#define SUPPORTED_FRU_VERSION_MINOR 0
+
+/* Used by the metadata request handler for the value of
+ * FRUTableMaximumSize
+ * 0 means SetFRURecordTable command is not supported (see DSP 0257
+ * v1.0.0 Table 9)
+ */
+#define FRU_TABLE_MAX_SIZE_UNSUPPORTED 0
+
+/*
+ * GetFRURecordTableMetadata (0X01)
+ * The GetFRURecordTableMetadata command is used to get the FRU Record
+ * Table metadata information that includes the FRU Record major
+ * version, the FRU Record minor version, the size of the largest FRU
+ * Record data, total length of the FRU Record Table, total number of
+ * FRU Record Data structures, and the integrity checksum on the FRU
+ * Record Table data.
+ */
+static int fru_get_record_table_metadata_handler(const struct pldm_rx_data *rx)
+{
+	size_t data_size = PLDM_MSG_SIZE(struct pldm_get_fru_record_table_metadata_resp);
+	uint16_t total_record_set_identifiers, total_table_records;
+	uint32_t fru_table_length;
+	struct pldm_tx_data *tx;
+	int rc;
+
+	/*
+	 * GetFRURecordTableMetadata requests
+	 * don't have any payload, so no need to decode them
+	 */
+
+	/* add specific fru record */
+	pldm_fru_set_local_table(&fru_table_length,
+				 &total_record_set_identifiers,
+				 &total_table_records);
+
+	/* create a PLDM response message for GetFRURecordTableMetadata */
+	tx = zalloc(sizeof(struct pldm_tx_data) + data_size);
+	if (!tx)
+		return OPAL_NO_MEM;
+	tx->data_size = data_size;
+	tx->tag_owner = true;
+	tx->msg_tag = rx->msg_tag;
+
+	rc = encode_get_fru_record_table_metadata_resp(
+				rx->hdrinf.instance,
+				PLDM_SUCCESS,
+				SUPPORTED_FRU_VERSION_MAJOR,
+				SUPPORTED_FRU_VERSION_MINOR,
+				FRU_TABLE_MAX_SIZE_UNSUPPORTED,
+				fru_table_length,
+				total_record_set_identifiers,
+				total_table_records,
+				0, // checksum, not calculated
+				(struct pldm_msg *)tx->data);
+	if (rc != PLDM_SUCCESS) {
+		prlog(PR_ERR, "Encode GetFRURecordTableMetadata Error, rc: %d\n", rc);
+		cc_resp(rx, rx->hdrinf.pldm_type,
+			rx->hdrinf.command, PLDM_ERROR);
+		free(tx);
+		return OPAL_PARAMETER;
+	}
+
+	/* send PLDM message over MCTP */
+	rc = pldm_mctp_message_tx(tx);
+	if (rc) {
+		prlog(PR_ERR, "Failed to send GetFRURecordTableMetadata response, rc = %d\n", rc);
+		free(tx);
+		return OPAL_HARDWARE;
+	}
+
+	free(tx);
+	return OPAL_SUCCESS;
+}
+
+static struct pldm_cmd pldm_fru_get_record_table_metadata = {
+	.name = "PLDM_GET_FRU_RECORD_TABLE_METADATA",
+	.pldm_cmd_id = PLDM_GET_FRU_RECORD_TABLE_METADATA,
+	.handler = fru_get_record_table_metadata_handler,
+};
+
 int pldm_responder_handle_request(struct pldm_rx_data *rx)
 {
 	const struct pldm_type *type;
@@ -994,5 +1086,9 @@ int pldm_responder_init(void)
 	add_cmd(&pldm_platform_type, &pldm_platform_set_state_effecter_states);
 	add_cmd(&pldm_platform_type, &pldm_platform_get_pdr);
 
+	/* Register fru commands we'll respond to - DSP0257 */
+	add_type(&pldm_fru_type);
+	add_cmd(&pldm_fru_type, &pldm_fru_get_record_table_metadata);
+
 	return OPAL_SUCCESS;
 }