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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <errno.h>
#include <string.h>
#include <rte_log.h>
#include "guest_channel.h"
#include "channel_commands.h"
#include "rte_power_kvm_vm.h"
#include "rte_power_common.h"
#define FD_PATH "/dev/virtio-ports/virtio.serial.port.poweragent"
static struct channel_packet pkt[CHANNEL_CMDS_MAX_VM_CHANNELS];
int
rte_power_kvm_vm_init(unsigned 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
rte_power_kvm_vm_exit(unsigned lcore_id)
{
guest_channel_host_disconnect(lcore_id);
return 0;
}
uint32_t
rte_power_kvm_vm_freqs(__attribute__((unused)) unsigned 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
rte_power_kvm_vm_get_freq(__attribute__((unused)) unsigned lcore_id)
{
RTE_LOG(ERR, POWER, "rte_power_get_freq is not implemented "
"for Virtual Machine Power Management\n");
return -ENOTSUP;
}
int
rte_power_kvm_vm_set_freq(__attribute__((unused)) unsigned 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 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
rte_power_kvm_vm_freq_up(unsigned lcore_id)
{
return send_msg(lcore_id, CPU_POWER_SCALE_UP);
}
int
rte_power_kvm_vm_freq_down(unsigned lcore_id)
{
return send_msg(lcore_id, CPU_POWER_SCALE_DOWN);
}
int
rte_power_kvm_vm_freq_max(unsigned lcore_id)
{
return send_msg(lcore_id, CPU_POWER_SCALE_MAX);
}
int
rte_power_kvm_vm_freq_min(unsigned lcore_id)
{
return send_msg(lcore_id, CPU_POWER_SCALE_MIN);
}
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