Imported Upstream version 16.04

[deb_dpdk.git] / lib / librte_power / rte_power_kvm_vm.c

diff --git a/lib/librte_power/rte_power_kvm_vm.c b/lib/librte_power/rte_power_kvm_vm.c
new file mode 100644 (file)
index 0000000..7bb2774
--- /dev/null
+++ b/lib/librte_power/rte_power_kvm_vm.c
@@ -0,0 +1,135 @@
+/*-
+ *   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", strerror(ret));
+       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);
+}