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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <acpi/acpigen.h>
#include <acpi/acpigen_pci.h>
#include <assert.h>
#include <device/pci_ops.h>
#include <intelblocks/acpi.h>
#include <soc/chip_common.h>
#include <soc/pci_devs.h>
#include <soc/util.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include "chip.h"
/*
* List of supported C-states in this processor.
*/
enum {
C_STATE_C1, /* 0 */
C_STATE_C3, /* 1 */
C_STATE_C6, /* 2 */
C_STATE_C7, /* 3 */
NUM_C_STATES
};
static const acpi_cstate_t cstate_map[NUM_C_STATES] = {
[C_STATE_C1] = {
/* C1 */
.latency = 1,
.power = 0x3e8,
.resource = MWAIT_RES(0, 0),
},
[C_STATE_C3] = {
/* C3 */
.latency = 15,
.power = 0x1f4,
.resource = MWAIT_RES(1, 0),
},
[C_STATE_C6] = {
/* C6 */
.latency = 41,
.power = 0x15e,
.resource = MWAIT_RES(2, 0),
},
[C_STATE_C7] = {
/* C7 */
.latency = 41,
.power = 0x0c8,
.resource = MWAIT_RES(3, 0),
}
};
/* Max states supported */
static int cstate_set_all[] = {
C_STATE_C1,
C_STATE_C3,
C_STATE_C6,
C_STATE_C7
};
static int cstate_set_c1_c6[] = {
C_STATE_C1,
C_STATE_C6,
};
const acpi_cstate_t *soc_get_cstate_map(size_t *entries)
{
static acpi_cstate_t map[ARRAY_SIZE(cstate_set_all)];
int *cstate_set;
int i;
const config_t *config = config_of_soc();
const enum acpi_cstate_mode states = config->cstate_states;
switch (states) {
case CSTATES_C1C6:
*entries = ARRAY_SIZE(cstate_set_c1_c6);
cstate_set = cstate_set_c1_c6;
break;
case CSTATES_ALL:
default:
*entries = ARRAY_SIZE(cstate_set_all);
cstate_set = cstate_set_all;
break;
}
for (i = 0; i < *entries; i++) {
map[i] = cstate_map[cstate_set[i]];
map[i].ctype = i + 1;
}
return map;
}
void iio_domain_set_acpi_name(struct device *dev, const char *prefix)
{
const union xeon_domain_path dn = {
.domain_path = dev_get_domain_id(dev)
};
assert(dn.socket < 8);
assert(dn.stack < 32);
assert(prefix != NULL && strlen(prefix) == 2);
if (dn.socket >= 8 || dn.stack >= 32 ||
!prefix || strlen(prefix) != 2)
return;
char *name = xmalloc(ACPI_NAME_BUFFER_SIZE);
snprintf(name, ACPI_NAME_BUFFER_SIZE, "%s%02X", prefix, ((dn.socket << 5) + dn.stack));
dev->name = name;
}
const char *soc_acpi_name(const struct device *dev)
{
if (dev->path.type == DEVICE_PATH_DOMAIN)
return dev->name;
/* FIXME: Add SoC specific device names here */
return NULL;
}
void acpigen_write_OSC_pci_domain_fixed_caps(const struct device *domain,
const uint32_t granted_pcie_features,
const bool is_cxl_domain,
const uint32_t granted_cxl_features)
{
acpigen_write_method("_OSC", 4);
acpigen_write_return_namestr("\\_SB.POSC");
acpigen_emit_byte(ARG0_OP);
acpigen_emit_byte(ARG1_OP);
acpigen_emit_byte(ARG2_OP);
acpigen_emit_byte(ARG3_OP);
acpigen_write_integer(granted_pcie_features);
acpigen_write_integer(is_cxl_domain);
acpigen_write_integer(granted_cxl_features);
acpigen_pop_len();
}
static bool read_physical_slot_number(const struct device *dev, uint8_t *psn)
{
if (!is_pci(dev))
return false;
const size_t pos = pci_find_capability(dev, PCI_CAP_ID_PCIE);
if (!pos)
return false;
u32 sltcap = pci_read_config32(dev, pos + PCI_EXP_SLTCAP);
*psn = ((sltcap >> 19) & 0x1FF);
return true;
}
static void acpigen_write_pci_root_port_devices(const struct device *rp)
{
uint8_t psn;
bool have_psn = read_physical_slot_number(rp, &psn);
struct device *dev = NULL;
while ((dev = dev_bus_each_child(rp->downstream, dev))) {
if (!is_pci(dev))
continue;
const char *name = acpi_device_name(dev);
if (!name)
continue;
acpigen_write_device(name);
acpigen_write_ADR_pci_device(dev);
if (have_psn)
acpigen_write_name_integer("_SUN", psn);
acpigen_pop_len();
}
}
void acpigen_write_pci_root_port(const struct device *rp)
{
const char *acpi_scope = acpi_device_scope(rp);
if (!acpi_scope)
return;
acpigen_write_scope(acpi_scope);
const char *acpi_name = acpi_device_name(rp);
if (!acpi_name)
return;
acpigen_write_device(acpi_name);
acpigen_write_ADR_pci_device(rp);
acpigen_write_pci_root_port_devices(rp);
acpigen_pop_len();
acpigen_pop_len();
}
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