power/utils.c - device/lge/bullhead - Git at Google

 /*
  * Copyright (c) 2012-2013, The Linux Foundation. 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 The Linux Foundation 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 "AS IS" AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
  * 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.
  */
 #define LOG_NIDEBUG 0

 #include <dlfcn.h>
 #include <fcntl.h>
 #include <errno.h>
 #include <stdlib.h>
 #include <string.h>

 #include "utils.h"
 #include "list.h"
 #include "hint-data.h"
 #include "power-common.h"

 #define LOG_TAG "QCOMPowerHAL"
 #include <utils/Log.h>

 #define INTERACTION_BOOST

 static void *qcopt_handle;
 static int (*perf_lock_acq)(unsigned long handle, int duration,
     int list[], int numArgs);
 static int (*perf_lock_rel)(unsigned long handle);
 static struct list_node active_hint_list_head;

 static void *get_qcopt_handle()
 {
     char qcopt_lib_path[PATH_MAX] = "libqti-perfd-client.so";
     void *handle = NULL;

     dlerror();

     handle = dlopen(qcopt_lib_path, RTLD_NOW);
 	if (!handle) {
 	    ALOGE("Unable to open %s: %s\n", qcopt_lib_path,
 	    dlerror());
     }

     return handle;
 }

 static void __attribute__ ((constructor)) initialize(void)
 {
     qcopt_handle = get_qcopt_handle();

     if (!qcopt_handle) {
         ALOGE("Failed to get qcopt handle.\n");
     } else {
         /*
          * qc-opt handle obtained. Get the perflock acquire/release
          * function pointers.
          */
         perf_lock_acq = dlsym(qcopt_handle, "perf_lock_acq");

         if (!perf_lock_acq) {
             ALOGE("Unable to get perf_lock_acq function handle.\n");
         }

         perf_lock_rel = dlsym(qcopt_handle, "perf_lock_rel");

         if (!perf_lock_rel) {
             ALOGE("Unable to get perf_lock_rel function handle.\n");
         }
     }
 }

 static void __attribute__ ((destructor)) cleanup(void)
 {
     if (qcopt_handle) {
         if (dlclose(qcopt_handle))
             ALOGE("Error occurred while closing qc-opt library.");
     }
 }

 int sysfs_read(char *path, char *s, int num_bytes)
 {
     char buf[80];
     int count;
     int ret = 0;
     int fd = open(path, O_RDONLY);

     if (fd < 0) {
         strerror_r(errno, buf, sizeof(buf));
         ALOGE("Error opening %s: %s\n", path, buf);

         return -1;
     }

     if ((count = read(fd, s, num_bytes - 1)) < 0) {
         strerror_r(errno, buf, sizeof(buf));
         ALOGE("Error writing to %s: %s\n", path, buf);

         ret = -1;
     } else {
         s[count] = '\0';
     }

     close(fd);

     return ret;
 }

 int sysfs_write(char *path, char *s)
 {
     char buf[80];
     int len;
     int ret = 0;
     int fd = open(path, O_WRONLY);

     if (fd < 0) {
         strerror_r(errno, buf, sizeof(buf));
         ALOGE("Error opening %s: %s\n", path, buf);
         return -1 ;
     }

     len = write(fd, s, strlen(s));
     if (len < 0) {
         strerror_r(errno, buf, sizeof(buf));
         ALOGE("Error writing to %s: %s\n", path, buf);

         ret = -1;
     }

     close(fd);

     return ret;
 }

 int get_scaling_governor(char governor[], int size)
 {
     if (sysfs_read(SCALING_GOVERNOR_PATH, governor,
                 size) == -1) {
         // Can't obtain the scaling governor. Return.
         return -1;
     } else {
         // Strip newline at the end.
         int len = strlen(governor);

         len--;

         while (len >= 0 && (governor[len] == '\n' || governor[len] == '\r'))
             governor[len--] = '\0';
     }

     return 0;
 }

 int interaction(int duration, int num_args, int opt_list[])
 {
 #ifdef INTERACTION_BOOST
     int lock_handle = 0;

     if (duration < 0 || num_args < 1 || opt_list[0] == NULL)
         return 0;

     if (qcopt_handle) {
         if (perf_lock_acq) {
             lock_handle = perf_lock_acq(lock_handle, duration, opt_list, num_args);
             if (lock_handle == -1)
                 ALOGE("Failed to acquire lock.");
         }
     }
     return lock_handle;
 #endif
     return 0;
 }

 int interaction_with_handle(int lock_handle, int duration, int num_args, int opt_list[])
 {
 #ifdef INTERACTION_BOOST
     if (duration < 0 || num_args < 1 || opt_list[0] == NULL)
         return 0;

     if (qcopt_handle) {
         if (perf_lock_acq) {
             lock_handle = perf_lock_acq(lock_handle, duration, opt_list, num_args);
             if (lock_handle == -1)
                 ALOGE("Failed to acquire lock.");
         }
     }
     return lock_handle;
 #endif
     return 0;
 }

 void perform_hint_action(int hint_id, int resource_values[], int num_resources)
 {
     if (qcopt_handle) {
         if (perf_lock_acq) {
             /* Acquire an indefinite lock for the requested resources. */
             int lock_handle = perf_lock_acq(0, 0, resource_values,
                     num_resources);

             if (lock_handle == -1) {
                 ALOGE("Failed to acquire lock.");
             } else {
                 /* Add this handle to our internal hint-list. */
                 struct hint_data *new_hint =
                     (struct hint_data *)malloc(sizeof(struct hint_data));

                 if (new_hint) {
                     if (!active_hint_list_head.compare) {
                         active_hint_list_head.compare =
                             (int (*)(void *, void *))hint_compare;
                         active_hint_list_head.dump = (void (*)(void *))hint_dump;
                     }

                     new_hint->hint_id = hint_id;
                     new_hint->perflock_handle = lock_handle;

                     if (add_list_node(&active_hint_list_head, new_hint) == NULL) {
                         free(new_hint);
                         /* Can't keep track of this lock. Release it. */
                         if (perf_lock_rel)
                             perf_lock_rel(lock_handle);

                         ALOGE("Failed to process hint.");
                     }
                 } else {
                     /* Can't keep track of this lock. Release it. */
                     if (perf_lock_rel)
                         perf_lock_rel(lock_handle);

                     ALOGE("Failed to process hint.");
                 }
             }
         }
     }
 }

 void undo_hint_action(int hint_id)
 {
     if (qcopt_handle) {
         if (perf_lock_rel) {
             /* Get hint-data associated with this hint-id */
             struct list_node *found_node;
             struct hint_data temp_hint_data = {
                 .hint_id = hint_id
             };

             found_node = find_node(&active_hint_list_head,
                     &temp_hint_data);

             if (found_node) {
                 /* Release this lock. */
                 struct hint_data *found_hint_data =
                     (struct hint_data *)(found_node->data);

                 if (found_hint_data) {
                     if (perf_lock_rel(found_hint_data->perflock_handle) == -1)
                         ALOGE("Perflock release failed.");
                 }

                 if (found_node->data) {
                     /* We can free the hint-data for this node. */
                     free(found_node->data);
                 }

                 remove_list_node(&active_hint_list_head, found_node);
             } else {
                 ALOGE("Invalid hint ID.");
             }
         }
     }
 }

 /*
  * Used to release initial lock holding
  * two cores online when the display is on
  */
 void undo_initial_hint_action()
 {
     if (qcopt_handle) {
         if (perf_lock_rel) {
             perf_lock_rel(1);
         }
     }
 }
	/*
	* Copyright (c) 2012-2013, The Linux Foundation. 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 The Linux Foundation 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 "AS IS" AND ANY EXPRESS OR IMPLIED
	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
	* 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.
	*/
	#define LOG_NIDEBUG 0

	#include <dlfcn.h>
	#include <fcntl.h>
	#include <errno.h>
	#include <stdlib.h>
	#include <string.h>

	#include "utils.h"
	#include "list.h"
	#include "hint-data.h"
	#include "power-common.h"

	#define LOG_TAG "QCOMPowerHAL"
	#include <utils/Log.h>

	#define INTERACTION_BOOST

	static void *qcopt_handle;
	static int (*perf_lock_acq)(unsigned long handle, int duration,
	int list[], int numArgs);
	static int (*perf_lock_rel)(unsigned long handle);
	static struct list_node active_hint_list_head;

	static void *get_qcopt_handle()
	{
	char qcopt_lib_path[PATH_MAX] = "libqti-perfd-client.so";
	void *handle = NULL;

	dlerror();

	handle = dlopen(qcopt_lib_path, RTLD_NOW);
	if (!handle) {
	ALOGE("Unable to open %s: %s\n", qcopt_lib_path,
	dlerror());
	}

	return handle;
	}

	static void __attribute__ ((constructor)) initialize(void)
	{
	qcopt_handle = get_qcopt_handle();

	if (!qcopt_handle) {
	ALOGE("Failed to get qcopt handle.\n");
	} else {
	/*
	* qc-opt handle obtained. Get the perflock acquire/release
	* function pointers.
	*/
	perf_lock_acq = dlsym(qcopt_handle, "perf_lock_acq");

	if (!perf_lock_acq) {
	ALOGE("Unable to get perf_lock_acq function handle.\n");
	}

	perf_lock_rel = dlsym(qcopt_handle, "perf_lock_rel");

	if (!perf_lock_rel) {
	ALOGE("Unable to get perf_lock_rel function handle.\n");
	}
	}
	}

	static void __attribute__ ((destructor)) cleanup(void)
	{
	if (qcopt_handle) {
	if (dlclose(qcopt_handle))
	ALOGE("Error occurred while closing qc-opt library.");
	}
	}

	int sysfs_read(char path, char s, int num_bytes)
	{
	char buf[80];
	int count;
	int ret = 0;
	int fd = open(path, O_RDONLY);

	if (fd < 0) {
	strerror_r(errno, buf, sizeof(buf));
	ALOGE("Error opening %s: %s\n", path, buf);

	return -1;
	}

	if ((count = read(fd, s, num_bytes - 1)) < 0) {
	strerror_r(errno, buf, sizeof(buf));
	ALOGE("Error writing to %s: %s\n", path, buf);

	ret = -1;
	} else {
	s[count] = '\0';
	}

	close(fd);

	return ret;
	}

	int sysfs_write(char path, char s)
	{
	char buf[80];
	int len;
	int ret = 0;
	int fd = open(path, O_WRONLY);

	if (fd < 0) {
	strerror_r(errno, buf, sizeof(buf));
	ALOGE("Error opening %s: %s\n", path, buf);
	return -1 ;
	}

	len = write(fd, s, strlen(s));
	if (len < 0) {
	strerror_r(errno, buf, sizeof(buf));
	ALOGE("Error writing to %s: %s\n", path, buf);

	ret = -1;
	}

	close(fd);

	return ret;
	}

	int get_scaling_governor(char governor[], int size)
	{
	if (sysfs_read(SCALING_GOVERNOR_PATH, governor,
	size) == -1) {
	// Can't obtain the scaling governor. Return.
	return -1;
	} else {
	// Strip newline at the end.
	int len = strlen(governor);

	len--;

	while (len >= 0 && (governor[len] == '\n' \|\| governor[len] == '\r'))
	governor[len--] = '\0';
	}

	return 0;
	}

	int interaction(int duration, int num_args, int opt_list[])
	{
	#ifdef INTERACTION_BOOST
	int lock_handle = 0;

	if (duration < 0 \|\| num_args < 1 \|\| opt_list[0] == NULL)
	return 0;

	if (qcopt_handle) {
	if (perf_lock_acq) {
	lock_handle = perf_lock_acq(lock_handle, duration, opt_list, num_args);
	if (lock_handle == -1)
	ALOGE("Failed to acquire lock.");
	}
	}
	return lock_handle;
	#endif
	return 0;
	}

	int interaction_with_handle(int lock_handle, int duration, int num_args, int opt_list[])
	{
	#ifdef INTERACTION_BOOST
	if (duration < 0 \|\| num_args < 1 \|\| opt_list[0] == NULL)
	return 0;

	if (qcopt_handle) {
	if (perf_lock_acq) {
	lock_handle = perf_lock_acq(lock_handle, duration, opt_list, num_args);
	if (lock_handle == -1)
	ALOGE("Failed to acquire lock.");
	}
	}
	return lock_handle;
	#endif
	return 0;
	}

	void perform_hint_action(int hint_id, int resource_values[], int num_resources)
	{
	if (qcopt_handle) {
	if (perf_lock_acq) {
	/* Acquire an indefinite lock for the requested resources. */
	int lock_handle = perf_lock_acq(0, 0, resource_values,
	num_resources);

	if (lock_handle == -1) {
	ALOGE("Failed to acquire lock.");
	} else {
	/* Add this handle to our internal hint-list. */
	struct hint_data *new_hint =
	(struct hint_data *)malloc(sizeof(struct hint_data));

	if (new_hint) {
	if (!active_hint_list_head.compare) {
	active_hint_list_head.compare =
	(int ()(void , void *))hint_compare;
	active_hint_list_head.dump = (void ()(void ))hint_dump;
	}

	new_hint->hint_id = hint_id;
	new_hint->perflock_handle = lock_handle;

	if (add_list_node(&active_hint_list_head, new_hint) == NULL) {
	free(new_hint);
	/* Can't keep track of this lock. Release it. */
	if (perf_lock_rel)
	perf_lock_rel(lock_handle);

	ALOGE("Failed to process hint.");
	}
	} else {
	/* Can't keep track of this lock. Release it. */
	if (perf_lock_rel)
	perf_lock_rel(lock_handle);

	ALOGE("Failed to process hint.");
	}
	}
	}
	}
	}

	void undo_hint_action(int hint_id)
	{
	if (qcopt_handle) {
	if (perf_lock_rel) {
	/* Get hint-data associated with this hint-id */
	struct list_node *found_node;
	struct hint_data temp_hint_data = {
	.hint_id = hint_id
	};

	found_node = find_node(&active_hint_list_head,
	&temp_hint_data);

	if (found_node) {
	/* Release this lock. */
	struct hint_data *found_hint_data =
	(struct hint_data *)(found_node->data);

	if (found_hint_data) {
	if (perf_lock_rel(found_hint_data->perflock_handle) == -1)
	ALOGE("Perflock release failed.");
	}

	if (found_node->data) {
	/* We can free the hint-data for this node. */
	free(found_node->data);
	}

	remove_list_node(&active_hint_list_head, found_node);
	} else {
	ALOGE("Invalid hint ID.");
	}
	}
	}
	}

	/*
	* Used to release initial lock holding
	* two cores online when the display is on
	*/
	void undo_initial_hint_action()
	{
	if (qcopt_handle) {
	if (perf_lock_rel) {
	perf_lock_rel(1);
	}
	}
	}