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af190494f9
This patch enables support for OSPM suspend and resume in the MIC driver. During a host suspend event, the driver performs an orderly shutdown of the cards if they are online. Upon resume, any cards that were previously online before suspend are rebooted. The driver performs an orderly shutdown of the card primarily to ensure that applications in the card are terminated and mounted devices are safely un-mounted before the card is powered down in the event of an OSPM suspend. The driver makes use of the MIC daemon to accomplish OSPM suspend and resume. The driver registers a PM notifier per MIC device. The devices get notified synchronously during PM_SUSPEND_PREPARE and PM_POST_SUSPEND phases. During the PM_SUSPEND_PREPARE phase, the driver performs one of the following three tasks. 1) If the card is 'offline', the driver sets the card to a 'suspended' state and returns. 2) If the card is 'online', the driver initiates card shutdown by setting the card state to suspending. This notifies the MIC daemon which invokes shutdown and sets card state to 'suspended'. The driver returns after the shutdown is complete. 3) If the card is already being shutdown, possibly by a host user space application, the driver sets the card state to 'suspended' and returns after the shutdown is complete. During the PM_POST_SUSPEND phase, the driver simply notifies the daemon and returns. The daemon boots those cards that were previously online during the suspend phase. Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com> Signed-off-by: Nikhil Rao <nikhil.rao@intel.com> Signed-off-by: Harshavardhan R Kharche <harshavardhan.r.kharche@intel.com> Signed-off-by: Sudeep Dutt <sudeep.dutt@intel.com> Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
103 lines
2.3 KiB
C
103 lines
2.3 KiB
C
/*
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* Intel MIC Platform Software Stack (MPSS)
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*
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* Copyright(c) 2013 Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* The full GNU General Public License is included in this distribution in
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* the file called "COPYING".
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*
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* Intel MIC User Space Tools.
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*/
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#ifndef _MPSSD_H_
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#define _MPSSD_H_
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <libgen.h>
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#include <pthread.h>
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#include <stdarg.h>
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#include <time.h>
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#include <errno.h>
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#include <sys/dir.h>
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#include <sys/ioctl.h>
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#include <sys/poll.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <sys/utsname.h>
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#include <sys/wait.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <pthread.h>
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#include <signal.h>
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#include <limits.h>
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#include <syslog.h>
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#include <getopt.h>
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#include <net/if.h>
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#include <linux/if_tun.h>
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#include <linux/if_tun.h>
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#include <linux/virtio_ids.h>
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#define MICSYSFSDIR "/sys/class/mic"
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#define LOGFILE_NAME "/var/log/mpssd"
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#define PAGE_SIZE 4096
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struct mic_console_info {
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pthread_t console_thread;
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int virtio_console_fd;
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void *console_dp;
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};
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struct mic_net_info {
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pthread_t net_thread;
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int virtio_net_fd;
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int tap_fd;
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void *net_dp;
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};
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struct mic_virtblk_info {
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pthread_t block_thread;
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int virtio_block_fd;
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void *block_dp;
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volatile sig_atomic_t signaled;
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char *backend_file;
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int backend;
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void *backend_addr;
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long backend_size;
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};
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struct mic_info {
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int id;
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char *name;
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pthread_t config_thread;
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pid_t pid;
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struct mic_console_info mic_console;
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struct mic_net_info mic_net;
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struct mic_virtblk_info mic_virtblk;
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int restart;
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int boot_on_resume;
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struct mic_info *next;
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};
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__attribute__((format(printf, 1, 2)))
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void mpsslog(char *format, ...);
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char *readsysfs(char *dir, char *entry);
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int setsysfs(char *dir, char *entry, char *value);
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#endif
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