/*
* HMAT ACPI Implementation
*
* Copyright(C) 2019 Intel Corporation.
*
* Author:
* Liu jingqi <jingqi.liu@linux.intel.com>
* Tao Xu <tao3.xu@intel.com>
*
* HMAT is defined in ACPI 6.3: 5.2.27 Heterogeneous Memory Attribute Table
* (HMAT)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "sysemu/numa.h"
#include "hw/acpi/hmat.h"
/*
* ACPI 6.3:
* 5.2.27.3 Memory Proximity Domain Attributes Structure: Table 5-145
*/
static void build_hmat_mpda(GArray *table_data, uint16_t flags,
uint32_t initiator, uint32_t mem_node)
{
/* Memory Proximity Domain Attributes Structure */
/* Type */
build_append_int_noprefix(table_data, 0, 2);
/* Reserved */
build_append_int_noprefix(table_data, 0, 2);
/* Length */
build_append_int_noprefix(table_data, 40, 4);
/* Flags */
build_append_int_noprefix(table_data, flags, 2);
/* Reserved */
build_append_int_noprefix(table_data, 0, 2);
/* Proximity Domain for the Attached Initiator */
build_append_int_noprefix(table_data, initiator, 4);
/* Proximity Domain for the Memory */
build_append_int_noprefix(table_data, mem_node, 4);
/* Reserved */
build_append_int_noprefix(table_data, 0, 4);
/*
* Reserved:
* Previously defined as the Start Address of the System Physical
* Address Range. Deprecated since ACPI Spec 6.3.
*/
build_append_int_noprefix(table_data, 0, 8);
/*
* Reserved:
* Previously defined as the Range Length of the region in bytes.
* Deprecated since ACPI Spec 6.3.
*/
build_append_int_noprefix(table_data, 0, 8);
}
/*
* ACPI 6.3: 5.2.27.4 System Locality Latency and Bandwidth Information
* Structure: Table 5-146
*/
static void build_hmat_lb(GArray *table_data, HMAT_LB_Info *hmat_lb,
uint32_t num_initiator, uint32_t num_target,
uint32_t *initiator_list)
{
int i, index;
HMAT_LB_Data *lb_data;
uint16_t *entry_list;
uint32_t base;
/* Length in bytes for entire structure */
uint32_t lb_length
= 32 /* Table length upto and including Entry Base Unit */
+ 4 * num_initiator /* Initiator Proximity Domain List */
+ 4 * num_target /* Target Proximity Domain List */
+ 2 * num_initiator * num_target; /* Latency or Bandwidth Entries */
/* Type */
build_append_int_noprefix(table_data, 1, 2);
/* Reserved */
build_append_int_noprefix(table_data, 0, 2);
/* Length */
build_append_int_noprefix(table_data, lb_length, 4);
/* Flags: Bits [3:0] Memory Hierarchy, Bits[7:4] Reserved */
assert(!(hmat_lb->hierarchy >> 4));
build_append_int_noprefix(table_data, hmat_lb->hierarchy, 1);
/* Data Type */
build_append_int_noprefix(table_data, hmat_lb->data_type, 1);
/* Reserved */
build_append_int_noprefix(table_data, 0, 2);
/* Number of Initiator Proximity Domains (s) */
build_append_int_noprefix(table_data, num_initiator, 4);
/* Number of Target Proximity Domains (t) */
build_append_int_noprefix(table_data, num_target, 4);
/* Reserved */
build_append_int_noprefix(table_data, 0, 4);
/* Entry Base Unit */
if (hmat_lb->data_type <= HMAT_LB_DATA_WRITE_LATENCY) {
/* Convert latency base from nanoseconds to picosecond */
base = hmat_lb->base * 1000;
} else {
/* Convert bandwidth base from Byte to Megabyte */
base = hmat_lb->base / MiB;
}
build_append_int_noprefix(table_data, base, 8);
/* Initiator Proximity Domain List */
for (i = 0; i < num_initiator; i++) {
build_append_int_noprefix(table_data, initiator_list[i], 4);
}
/* Target Proximity Domain List */
for (i = 0; i < num_target; i++) {
build_append_int_noprefix(table_data, i, 4);
}
/* Latency or Bandwidth Entries */
entry_list = g_malloc0(num_initiator * num_target * sizeof(uint16_t));
for (i = 0; i < hmat_lb->list->len; i++) {
lb_data = &g_array_index(hmat_lb->list, HMAT_LB_Data, i);
index = lb_data->initiator * num_target + lb_data->target;
entry_list[index] = (uint16_t)(lb_data->data / hmat_lb->base);
}
for (i = 0; i < num_initiator * num_target; i++) {
build_append_int_noprefix(table_data, entry_list[i], 2);
}
g_free(entry_list);
}
/* ACPI 6.3: 5.2.27.5 Memory Side Cache Information Structure: Table 5-147 */
static void build_hmat_cache(GArray *table_data, uint8_t total_levels,
NumaHmatCacheOptions *hmat_cache)
{
/*
* Cache Attributes: Bits [3:0] – Total Cache Levels
* for this Memory Proximity Domain
*/
uint32_t cache_attr = total_levels;
/* Bits [7:4] : Cache Level described in this structure */
cache_attr |= (uint32_t) hmat_cache->level << 4;
/* Bits [11:8] - Cache Associativity */
cache_attr |= (uint32_t) hmat_cache->associativity << 8;
/* Bits [15:12] - Write Policy */
cache_attr |= (uint32_t) hmat_cache->policy << 12;
/* Bits [31:16] - Cache Line size in bytes */
cache_attr |= (uint32_t) hmat_cache->line << 16;
/* Type */
build_append_int_noprefix(table_data, 2, 2);
/* Reserved */
build_append_int_noprefix(table_data, 0, 2);
/* Length */
build_append_int_noprefix(table_data, 32, 4);
/* Proximity Domain for the Memory */
build_append_int_noprefix(table_data, hmat_cache->node_id, 4);
/* Reserved */
build_append_int_noprefix(table_data, 0, 4);
/* Memory Side Cache Size */
build_append_int_noprefix(table_data, hmat_cache->size, 8);
/* Cache Attributes */
build_append_int_noprefix(table_data, cache_attr, 4);
/* Reserved */
build_append_int_noprefix(table_data, 0, 2);
/*
* Number of SMBIOS handles (n)
* Linux kernel uses Memory Side Cache Information Structure
* without SMBIOS entries for now, so set Number of SMBIOS handles
* as 0.
*/
build_append_int_noprefix(table_data, 0, 2);
}
/* Build HMAT sub table structures */
static void hmat_build_table_structs(GArray *table_data, NumaState *numa_state)
{
uint16_t flags;
uint32_t num_initiator = 0;
uint32_t initiator_list[MAX_NODES];
int i, hierarchy, type, cache_level, total_levels;
HMAT_LB_Info *hmat_lb;
NumaHmatCacheOptions *hmat_cache;
for (i = 0; i < numa_state->num_nodes; i++) {
flags = 0;
if (numa_state->nodes[i].initiator < MAX_NODES) {
flags |= HMAT_PROXIMITY_INITIATOR_VALID;
}
build_hmat_mpda(table_data, flags, numa_state->nodes[i].initiator, i);
}
for (i = 0; i < numa_state->num_nodes; i++) {
if (numa_state->nodes[i].has_cpu) {
initiator_list[num_initiator++] = i;
}
}
/*
* ACPI 6.3: 5.2.27.4 System Locality Latency and Bandwidth Information
* Structure: Table 5-146
*/
for (hierarchy = HMAT_LB_MEM_MEMORY;
hierarchy <= HMAT_LB_MEM_CACHE_3RD_LEVEL; hierarchy++) {
for (type = HMAT_LB_DATA_ACCESS_LATENCY;
type <= HMAT_LB_DATA_WRITE_BANDWIDTH; type++) {
hmat_lb = numa_state->hmat_lb[hierarchy][type];
if (hmat_lb && hmat_lb->list->len) {
build_hmat_lb(table_data, hmat_lb, num_initiator,
numa_state->num_nodes, initiator_list);
}
}
}
/*
* ACPI 6.3: 5.2.27.5 Memory Side Cache Information Structure:
* Table 5-147
*/
for (i = 0; i < numa_state->num_nodes; i++) {
total_levels = 0;
for (cache_level = 1; cache_level < HMAT_LB_LEVELS; cache_level++) {
if (numa_state->hmat_cache[i][cache_level]) {
total_levels++;
}
}
for (cache_level = 0; cache_level <= total_levels; cache_level++) {
hmat_cache = numa_state->hmat_cache[i][cache_level];
if (hmat_cache) {
build_hmat_cache(table_data, total_levels, hmat_cache);
}
}
}
}
void build_hmat(GArray *table_data, BIOSLinker *linker, NumaState *numa_state)
{
int hmat_start = table_data->len;
/* reserve space for HMAT header */
acpi_data_push(table_data, 40);
hmat_build_table_structs(table_data, numa_state);
build_header(linker, table_data,
(void *)(table_data->data + hmat_start),
"HMAT", table_data->len - hmat_start, 2, NULL, NULL);
}
