[Skiboot] [PATCH 10/14] core/pldm: Decode the GetFRURecordTableMetadata request

Christophe Lombard clombard at linux.vnet.ibm.com
Tue Apr 19 23:46:29 AEST 2022


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 at linux.vnet.ibm.com>
---
 core/pldm/pldm-fru-requests.c | 53 ++++++++++++++++++++++
 core/pldm/pldm-responder.c    | 85 +++++++++++++++++++++++++++++++++++
 core/pldm/pldm.h              |  3 ++
 3 files changed, 141 insertions(+)

diff --git a/core/pldm/pldm-fru-requests.c b/core/pldm/pldm-fru-requests.c
index eda8f939..6da1fb55 100644
--- a/core/pldm/pldm-fru-requests.c
+++ b/core/pldm/pldm-fru-requests.c
@@ -11,6 +11,9 @@
 #include <pldm/libpldm/fru.h>
 #include "pldm.h"
 
+static void *fru_table;
+static size_t fru_table_length;
+
 static int get_fru_record_by_option_req(uint16_t fru_table_handle,
 					uint16_t record_set_identifier,
 					uint8_t record_type,
@@ -146,3 +149,53 @@ int pldm_fru_dt_add_bmc_version(void)
 
 	return OPAL_SUCCESS;
 }
+
+#define RECORD_SET_ID 100
+
+void pldm_fru_add_record(uint32_t *table_length,
+			 uint16_t *total_record_set_identifiers,
+			 uint16_t *total_table_records)
+{
+	struct pldm_fru_record_data_format *record;
+	struct pldm_fru_record_tlv *fru_tlv;
+	size_t fru_table_size, record_size;
+	char fru_product[] = "IBM, skiboot";
+
+	if (fru_table) {
+		*table_length = fru_table_length;
+		*total_record_set_identifiers =  1;
+		*total_table_records = 1;
+		return;
+	}
+
+	/* allocate fru table */
+	fru_table_size = sizeof(struct pldm_fru_record_data_format) +
+			 sizeof(struct pldm_fru_record_tlv) +
+			 strlen(fru_product);
+	fru_table = malloc(fru_table_size);
+
+	/* fill fru record data */
+	record = (struct pldm_fru_record_data_format *)fru_table;
+	record->record_set_id = htole16(RECORD_SET_ID);
+	record->record_type = PLDM_FRU_RECORD_TYPE_GENERAL;
+	record->num_fru_fields = 1;
+	record->encoding_type = PLDM_FRU_ENCODING_ASCII;
+
+	/* to start, set the size as the start of the TLV structs */
+	record_size = offsetof(struct pldm_fru_record_data_format, tlvs);
+
+	/* TLVs data */
+	fru_tlv = (struct pldm_fru_record_tlv *)(fru_table + record_size);
+	fru_tlv->type = PLDM_FRU_FIELD_TYPE_OTHER;
+	fru_tlv->length = strlen(fru_product);
+	memcpy(fru_tlv->value, fru_product, fru_tlv->length);
+
+	/* increment record_size by total size of this TLV */
+	record_size += (offsetof(struct pldm_fru_record_tlv, value) + fru_tlv->length);
+
+	*table_length = record_size;
+	*total_record_set_identifiers =  1;
+	*total_table_records = 1;
+
+	fru_table_length = *table_length;
+}
diff --git a/core/pldm/pldm-responder.c b/core/pldm/pldm-responder.c
index 69d411f9..008f76b6 100644
--- a/core/pldm/pldm-responder.c
+++ b/core/pldm/pldm-responder.c
@@ -11,6 +11,7 @@
 #include <opal-msg.h>
 #include <debug_descriptor.h>
 #include <pldm/ibm/libpldm/platform_oem_ibm.h>
+#include <pldm/libpldm/fru.h>
 #include <pldm/libpldm/platform.h>
 #include <pldm/libpldm/state_set.h>
 #include <pldm/libpldm/utils.h>
@@ -880,6 +881,86 @@ 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 *req)
+{
+	char response_msg[PKT_SIZE(struct pldm_get_fru_record_table_metadata_resp)];
+	uint16_t total_record_set_identifiers, total_table_records;
+	uint32_t fru_table_length;
+	int rc;
+
+	/*
+	 * GetFRURecordTableMetadataGetFRURecordTableMetadata requests
+	 * don't have any payload, so no need to decode them
+	 */
+
+	/* add specific fru record */
+	pldm_fru_add_record(&fru_table_length,
+			    &total_record_set_identifiers,
+			    &total_table_records);
+
+	/* create a PLDM response message for GetFRURecordTableMetadata */
+	rc = encode_get_fru_record_table_metadata_resp(
+				req->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 *)response_msg);
+	if (rc != PLDM_SUCCESS) {
+		prlog(PR_ERR, "Encode GetFRURecordTableMetadata Error, rc: %d\n", rc);
+		pldm_cc_resp(req, req->hdrinf.pldm_type,
+			     req->hdrinf.command, PLDM_ERROR);
+		return OPAL_PARAMETER;
+	}
+
+	/* send PLDM message over MCTP */
+	rc = pldm_send(req->source_eid, response_msg, sizeof(response_msg));
+	if (rc) {
+		prlog(PR_ERR, "Failed to send GetFRURecordTableMetadata response, rc = %d\n", rc);
+		return OPAL_HARDWARE;
+	}
+
+	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_rx_handle_request(struct pldm_rx_data *rx)
 {
 	const struct pldm_type *t;
@@ -928,5 +1009,9 @@ int pldm_mctp_responder_init(void)
 	pldm_add_cmd(&pldm_platform_type, &pldm_platform_set_state_effecter_states);
 	pldm_add_cmd(&pldm_platform_type, &pldm_platform_get_pdr);
 
+	/* Register platform commands we'll respond to - DSP0257 */
+	pldm_add_type(&pldm_fru_type);
+	pldm_add_cmd(&pldm_fru_type, &pldm_fru_get_record_table_metadata);
+
 	return OPAL_SUCCESS;
 }
diff --git a/core/pldm/pldm.h b/core/pldm/pldm.h
index c7dd21f5..fa2a1f94 100644
--- a/core/pldm/pldm.h
+++ b/core/pldm/pldm.h
@@ -73,6 +73,9 @@ int pldm_fru_get_record_by_option(uint16_t fru_table_handle,
 				  uint8_t record_type,
 				  uint8_t field_type,
 				  struct variable_field *fru_structure_data);
+void pldm_fru_add_record(uint32_t *fru_table_length,
+			 uint16_t *total_record_set_identifiers,
+			 uint16_t *total_table_records);
 
 int pldm_bios_find_lid_by_attr_name(const char *name, char **lid);
 int pldm_bios_get_lids_id(char **lid_ids_string);
-- 
2.35.1



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