src/drivers/ocp/ewl/ewl.c

/* SPDX-License-Identifier: GPL-2.0-or-later */

#include <soc/soc_util.h>
#include <lib.h>
#include <drivers/ipmi/ocp/ipmi_ocp.h>
#include "ocp_ewl.h"

static void ipmi_send_sel_ewl_type3_err(EWL_ENTRY_HEADER *header,
		EWL_ENTRY_MEMORY_LOCATION memory_location)
{
	struct ipmi_sel_mem_err sel;
	uint8_t socketid;
	EWL_ENTRY_TYPE3 *basic_warning;
	basic_warning = (EWL_ENTRY_TYPE3 *)header;

	/* Ignore invalid EWL DIMM location before sending SEL */
	if (memory_location.Channel == 0xff || memory_location.Dimm == 0xff)
		return;
	memset(&sel, 0, sizeof(struct ipmi_sel_mem_err));
	sel.record_id = 0x0000;
	sel.record_type = 0xfb;
	sel.general_info = SEL_INTEL_MEMORY_ERROR;
	sel.timestamp = 0;
	socketid = get_blade_id() - 1;
	sel.socket =  socketid <<= 4;
	sel.channel = memory_location.Channel;
	sel.dimm_slot = memory_location.Dimm;
	sel.rsvd1 = 0xff;
	sel.dimm_failure_type = MEM_TRAINING_ERR;
	sel.major_code = basic_warning->Context.MajorWarningCode;
	sel.minor_code = basic_warning->Context.MinorWarningCode;
	sel.rsvd2 = 0xff;
	ipmi_send_to_bmc((unsigned char *)&sel, sizeof(sel));
	printk(BIOS_DEBUG, "ipmi send memory training error\n");
}

static void process_ewl_type3(EWL_ENTRY_HEADER *header, EWL_ENTRY_MEMORY_LOCATION memory_location)
{
	/* Treat warning as type 3, collect basic information and print to serial log */
	EWL_ENTRY_TYPE3 *basic_warning;
	basic_warning = (EWL_ENTRY_TYPE3 *)header;
	printk(BIOS_ERR, "Major Warning Code = 0x%02x, Minor Warning Code = 0x%02x,\n",
			basic_warning->Context.MajorWarningCode,
			basic_warning->Context.MinorWarningCode);
	printk(BIOS_ERR, "Major Checkpoint: 0x%02x\n", basic_warning->Context.MajorCheckpoint);
	printk(BIOS_ERR, "Minor Checkpoint: 0x%02x\n", basic_warning->Context.MinorCheckpoint);

	if (memory_location.Socket != 0xff)
		printk(BIOS_ERR, "Socket %d\n", memory_location.Socket);
	if (memory_location.Channel != 0xff)
		printk(BIOS_ERR, "Channel %d\n", memory_location.Channel);
	if (memory_location.Dimm != 0xff)
		printk(BIOS_ERR, "Dimm %d\n", memory_location.Dimm);
	if (memory_location.Rank != 0xff)
		printk(BIOS_ERR, "Rank %d\n", memory_location.Rank);
}

void get_ewl(void)
{
	const EWL_PRIVATE_DATA *hob = get_ewl_hob();
	int offset = 0;
	bool type3_flag = 0;
	EWL_ENTRY_HEADER *warning_header;
	printk(BIOS_DEBUG, "Number of EWL entries %d\n", hob->numEntries);
	while (offset < hob->status.Header.FreeOffset) {
		warning_header = (EWL_ENTRY_HEADER *) &(hob->status.Buffer[offset]);
		if (warning_header->Type == EwlType3) {
			printk(BIOS_ERR, "EWL type: %d size:%d severity level:%d\n",
					warning_header->Type,
					warning_header->Size,
					warning_header->Severity);
			if (warning_header->Size != sizeof(EWL_ENTRY_TYPE3)) {
				printk(BIOS_ERR, "EWL type3 size mismatch!\n");
				return;
			}
			EWL_ENTRY_TYPE3 *type3;
			type3 = (EWL_ENTRY_TYPE3 *)warning_header;
			process_ewl_type3(warning_header, type3->MemoryLocation);
			type3_flag = 1;
			ipmi_send_sel_ewl_type3_err(warning_header, type3->MemoryLocation);
		} else {
			printk(BIOS_DEBUG, "EWL type: %d size:%d severity level:%d\n",
					warning_header->Type,
					warning_header->Size,
					warning_header->Severity);
			hexdump(&(hob->status.Buffer[offset]), warning_header->Size);
		}
		offset += warning_header->Size;
	}
	if (type3_flag) {
		/* If Fastboot is enabled, the next boot will skip MRC and won't detect
		   MRC error via EWL and still can boot up, so enforce MRC after reboot. */
		soc_set_mrc_cold_boot_flag(true);
		die("Memory Training Error!\n");
	}
}