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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* AMD Address Translation Library
*
* umc.c : Unified Memory Controller (UMC) topology helpers
*
* Copyright (c) 2023, Advanced Micro Devices, Inc.
* All Rights Reserved.
*
* Author: Yazen Ghannam <Yazen.Ghannam@amd.com>
*/
#include "internal.h"
/*
* MI300 has a fixed, model-specific mapping between a UMC instance and
* its related Data Fabric Coherent Station instance.
*
* The MCA_IPID_UMC[InstanceId] field holds a unique identifier for the
* UMC instance within a Node. Use this to find the appropriate Coherent
* Station ID.
*
* Redundant bits were removed from the map below.
*/
static const u16 umc_coh_st_map[32] = {
0x393, 0x293, 0x193, 0x093,
0x392, 0x292, 0x192, 0x092,
0x391, 0x291, 0x191, 0x091,
0x390, 0x290, 0x190, 0x090,
0x793, 0x693, 0x593, 0x493,
0x792, 0x692, 0x592, 0x492,
0x791, 0x691, 0x591, 0x491,
0x790, 0x690, 0x590, 0x490,
};
#define UMC_ID_MI300 GENMASK(23, 12)
static u8 get_coh_st_inst_id_mi300(struct atl_err *err)
{
u16 umc_id = FIELD_GET(UMC_ID_MI300, err->ipid);
u8 i;
for (i = 0; i < ARRAY_SIZE(umc_coh_st_map); i++) {
if (umc_id == umc_coh_st_map[i])
break;
}
WARN_ON_ONCE(i >= ARRAY_SIZE(umc_coh_st_map));
return i;
}
#define MCA_IPID_INST_ID_HI GENMASK_ULL(47, 44)
static u8 get_die_id(struct atl_err *err)
{
/*
* AMD Node ID is provided in MCA_IPID[InstanceIdHi], and this
* needs to be divided by 4 to get the internal Die ID.
*/
if (df_cfg.rev == DF4p5 && df_cfg.flags.heterogeneous) {
u8 node_id = FIELD_GET(MCA_IPID_INST_ID_HI, err->ipid);
return node_id >> 2;
}
/*
* For CPUs, this is the AMD Node ID modulo the number
* of AMD Nodes per socket.
*/
return topology_die_id(err->cpu) % amd_get_nodes_per_socket();
}
#define UMC_CHANNEL_NUM GENMASK(31, 20)
static u8 get_coh_st_inst_id(struct atl_err *err)
{
if (df_cfg.rev == DF4p5 && df_cfg.flags.heterogeneous)
return get_coh_st_inst_id_mi300(err);
return FIELD_GET(UMC_CHANNEL_NUM, err->ipid);
}
unsigned long convert_umc_mca_addr_to_sys_addr(struct atl_err *err)
{
u8 socket_id = topology_physical_package_id(err->cpu);
u8 coh_st_inst_id = get_coh_st_inst_id(err);
unsigned long addr = err->addr;
u8 die_id = get_die_id(err);
pr_debug("socket_id=0x%x die_id=0x%x coh_st_inst_id=0x%x addr=0x%016lx",
socket_id, die_id, coh_st_inst_id, addr);
return norm_to_sys_addr(socket_id, die_id, coh_st_inst_id, addr);
}
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