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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation
*/
#include <errno.h>
#include <string.h>
#include <rte_log.h>
#include "guest_channel.h"
#include "channel_commands.h"
#include "power_kvm_vm.h"
#include "power_common.h"
#define FD_PATH "/dev/virtio-ports/virtio.serial.port.poweragent"
static struct channel_packet pkt[CHANNEL_CMDS_MAX_VM_CHANNELS];
int
power_kvm_vm_init(unsigned int lcore_id)
{
if (lcore_id >= CHANNEL_CMDS_MAX_VM_CHANNELS) {
RTE_LOG(ERR, POWER, "Core(%u) is out of range 0...%d\n",
lcore_id, CHANNEL_CMDS_MAX_VM_CHANNELS-1);
return -1;
}
pkt[lcore_id].command = CPU_POWER;
pkt[lcore_id].resource_id = lcore_id;
return guest_channel_host_connect(FD_PATH, lcore_id);
}
int
power_kvm_vm_exit(unsigned int lcore_id)
{
guest_channel_host_disconnect(lcore_id);
return 0;
}
uint32_t
power_kvm_vm_freqs(__attribute__((unused)) unsigned int lcore_id,
__attribute__((unused)) uint32_t *freqs,
__attribute__((unused)) uint32_t num)
{
RTE_LOG(ERR, POWER, "rte_power_freqs is not implemented "
"for Virtual Machine Power Management\n");
return -ENOTSUP;
}
uint32_t
power_kvm_vm_get_freq(__attribute__((unused)) unsigned int lcore_id)
{
RTE_LOG(ERR, POWER, "rte_power_get_freq is not implemented "
"for Virtual Machine Power Management\n");
return -ENOTSUP;
}
int
power_kvm_vm_set_freq(__attribute__((unused)) unsigned int lcore_id,
__attribute__((unused)) uint32_t index)
{
RTE_LOG(ERR, POWER, "rte_power_set_freq is not implemented "
"for Virtual Machine Power Management\n");
return -ENOTSUP;
}
static inline int
send_msg(unsigned int lcore_id, uint32_t scale_direction)
{
int ret;
if (lcore_id >= CHANNEL_CMDS_MAX_VM_CHANNELS) {
RTE_LOG(ERR, POWER, "Core(%u) is out of range 0...%d\n",
lcore_id, CHANNEL_CMDS_MAX_VM_CHANNELS-1);
return -1;
}
pkt[lcore_id].unit = scale_direction;
ret = guest_channel_send_msg(&pkt[lcore_id], lcore_id);
if (ret == 0)
return 1;
RTE_LOG(DEBUG, POWER, "Error sending message: %s\n",
ret > 0 ? strerror(ret) : "channel not connected");
return -1;
}
int
power_kvm_vm_freq_up(unsigned int lcore_id)
{
return send_msg(lcore_id, CPU_POWER_SCALE_UP);
}
int
power_kvm_vm_freq_down(unsigned int lcore_id)
{
return send_msg(lcore_id, CPU_POWER_SCALE_DOWN);
}
int
power_kvm_vm_freq_max(unsigned int lcore_id)
{
return send_msg(lcore_id, CPU_POWER_SCALE_MAX);
}
int
power_kvm_vm_freq_min(unsigned int lcore_id)
{
return send_msg(lcore_id, CPU_POWER_SCALE_MIN);
}
int
power_kvm_vm_turbo_status(__attribute__((unused)) unsigned int lcore_id)
{
RTE_LOG(ERR, POWER, "rte_power_turbo_status is not implemented for Virtual Machine Power Management\n");
return -ENOTSUP;
}
int
power_kvm_vm_enable_turbo(unsigned int lcore_id)
{
return send_msg(lcore_id, CPU_POWER_ENABLE_TURBO);
}
int
power_kvm_vm_disable_turbo(unsigned int lcore_id)
{
return send_msg(lcore_id, CPU_POWER_DISABLE_TURBO);
}
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