core/pldm: Decode the GetFruRecordTable request

The GetFRURecordTable command is used to get the FRU Record Table data.
This command is defined to allow the FRU Record Table data to be
transferred using a sequence of one or more command/response messages.

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

3 files changed, 96 insertions, 0 deletions

diff --git a/core/pldm/pldm-fru-requests.c b/core/pldm/pldm-fru-requests.c
index fa4764b..a29a80a 100644
--- a/core/pldm/pldm-fru-requests.c
+++ b/core/pldm/pldm-fru-requests.c
@@ -269,6 +269,18 @@ void pldm_fru_set_local_table(uint32_t *table_length,
 	local_fru_table_length = *table_length;
 }
 
+int pldm_fru_get_local_table(void **fru_record_table_bytes,
+			     uint32_t *fru_record_table_size)
+{
+	if (!local_fru_record_table)
+		return OPAL_PARAMETER;
+
+	*fru_record_table_bytes = local_fru_record_table;
+	*fru_record_table_size = local_fru_table_length;
+
+	return OPAL_SUCCESS;
+}
+
 int pldm_fru_init(void)
 {
 	int rc;
diff --git a/core/pldm/pldm-responder.c b/core/pldm/pldm-responder.c
index 3ab813f..d42d9f5 100644
--- a/core/pldm/pldm-responder.c
+++ b/core/pldm/pldm-responder.c
@@ -1038,6 +1038,87 @@ static struct pldm_cmd pldm_fru_get_record_table_metadata = {
 	.handler = fru_get_record_table_metadata_handler,
 };
 
+/*
+ * GetFRURecordTable (0X02)
+ * The GetFRURecordTable command is used to get the FRU Record Table
+ * data. This command is defined to allow the FRU Record Table data to
+ * be transferred using a sequence of one or more command/response
+ * messages.
+ */
+static int fru_get_record_table_handler(const struct pldm_rx_data *rx)
+{
+	struct pldm_get_fru_record_table_resp *resp;
+	void *fru_record_table_bytes;
+	uint32_t fru_record_table_size;
+	struct pldm_tx_data *tx;
+	struct pldm_msg *msg;
+	size_t data_size;
+	int rc;
+
+	/* The getFruRecordTable requests do have request data, but it's
+	 * only related to multi-part transfers which we don't support
+	 * and which the BMC will not send us.
+	 */
+
+	/* get local fru record table */
+	rc = pldm_fru_get_local_table(&fru_record_table_bytes, &fru_record_table_size);
+	if (rc) {
+		prlog(PR_ERR, "Failed to get Fru Record Table\n");
+		cc_resp(rx, rx->hdrinf.pldm_type,
+			rx->hdrinf.command, PLDM_ERROR);
+		return OPAL_PARAMETER;
+	}
+
+	/* create a PLDM response message for GetFRURecordTable */
+	data_size = sizeof(struct pldm_msg_hdr) +
+		    sizeof(struct pldm_get_fru_record_table_resp) +
+		    fru_record_table_size;
+
+	tx = zalloc(sizeof(struct pldm_tx_data) + data_size);
+	if (!tx)
+		return OPAL_NO_MEM;
+	tx->data_size = data_size - 1;
+	tx->tag_owner = true;
+	tx->msg_tag = rx->msg_tag;
+
+	rc = encode_get_fru_record_table_resp(
+				rx->hdrinf.instance,
+				PLDM_SUCCESS,
+				0, // No next transfer handle
+				PLDM_START_AND_END,
+				(struct pldm_msg *)tx->data);
+	if (rc != PLDM_SUCCESS) {
+		prlog(PR_ERR, "Encode GetFruRecordTable Error, rc: %d\n", rc);
+		cc_resp(rx, rx->hdrinf.pldm_type,
+			rx->hdrinf.command, PLDM_ERROR);
+		free(tx);
+		return OPAL_PARAMETER;
+	}
+
+	msg = (struct pldm_msg *)tx->data;
+	resp = (struct pldm_get_fru_record_table_resp *)(msg->payload);
+	memcpy(resp->fru_record_table_data,
+	       fru_record_table_bytes,
+	       fru_record_table_size);
+
+	/* send PLDM message over MCTP */
+	rc = pldm_mctp_message_tx(tx);
+	if (rc) {
+		prlog(PR_ERR, "Failed to send GetFruRecordTable response, rc = %d\n", rc);
+		free(tx);
+		return OPAL_HARDWARE;
+	}
+
+	free(tx);
+	return OPAL_SUCCESS;
+}
+
+static struct pldm_cmd pldm_fru_get_record_table = {
+	.name = "PLDM_GET_FRU_RECORD_TABLE",
+	.pldm_cmd_id = PLDM_GET_FRU_RECORD_TABLE,
+	.handler = fru_get_record_table_handler,
+};
+
 int pldm_responder_handle_request(struct pldm_rx_data *rx)
 {
 	const struct pldm_type *type;
@@ -1089,6 +1170,7 @@ int pldm_responder_init(void)
 	/* Register fru commands we'll respond to - DSP0257 */
 	add_type(&pldm_fru_type);
 	add_cmd(&pldm_fru_type, &pldm_fru_get_record_table_metadata);
+	add_cmd(&pldm_fru_type, &pldm_fru_get_record_table);
 
 	return OPAL_SUCCESS;
 }
diff --git a/core/pldm/pldm.h b/core/pldm/pldm.h
index bc87824..fb837bf 100644
--- a/core/pldm/pldm.h
+++ b/core/pldm/pldm.h
@@ -83,6 +83,8 @@ int pldm_fru_get_bmc_version(void *bv, int len);
 void pldm_fru_set_local_table(uint32_t *table_length,
 			      uint16_t *total_record_set_identifiers,
 			      uint16_t *total_table_records);
+int pldm_fru_get_local_table(void **fru_record_table_bytes,
+			     uint32_t *fru_record_table_size);
 int pldm_fru_init(void);
 
 int pldm_bios_find_lid_by_attr_name(const char *name, char **lid);