text: /*
   * Copyright 2015 Advanced Micro Devices, Inc.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
   * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
   * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   * OTHER DEALINGS IN THE SOFTWARE.
   *
   */
  #include <linux/types.h>
  #include <linux/kernel.h>
  #include <linux/slab.h>
  #include "eventmgr.h"
  #include "hwmgr.h"
  #include "eventinit.h"
  #include "eventmanagement.h"
  
  static int pem_init(struct pp_eventmgr *eventmgr)
  {
  	int result = 0;
  	struct pem_event_data event_data = { {0} };
  
  	/* Initialize PowerPlay feature info */
  	pem_init_feature_info(eventmgr);
  
  	/* Initialize event action chains */
  	pem_init_event_action_chains(eventmgr);
  
  	/* Call initialization event */
  	result = pem_handle_event(eventmgr, AMD_PP_EVENT_INITIALIZE, &event_data);
  
  	if (0 != result)
  		return result;
  
  	/* Register interrupt callback functions */
  	result = pem_register_interrupts(eventmgr);
  	return 0;
  }
  
  static void pem_fini(struct pp_eventmgr *eventmgr)
  {
  	struct pem_event_data event_data = { {0} };
  
  	pem_uninit_featureInfo(eventmgr);
  	pem_unregister_interrupts(eventmgr);
  
  	pem_handle_event(eventmgr, AMD_PP_EVENT_UNINITIALIZE, &event_data);
  }
  
  int eventmgr_early_init(struct pp_instance *handle)
  {
  	struct pp_eventmgr *eventmgr;
  
  	if (handle == NULL)
  		return -EINVAL;
  
  	eventmgr = kzalloc(sizeof(struct pp_eventmgr), GFP_KERNEL);
  	if (eventmgr == NULL)
  		return -ENOMEM;
  
  	eventmgr->hwmgr = handle->hwmgr;
  	handle->eventmgr = eventmgr;
  
  	eventmgr->platform_descriptor = &(eventmgr->hwmgr->platform_descriptor);
  	eventmgr->pp_eventmgr_init = pem_init;
  	eventmgr->pp_eventmgr_fini = pem_fini;
  
  	return 0;
  }
  
  static int pem_handle_event_unlocked(struct pp_eventmgr *eventmgr, enum amd_pp_event event, struct pem_event_data *data)
  {
  	if (eventmgr == NULL || event >= AMD_PP_EVENT_MAX || data == NULL)
  		return -EINVAL;
  
  	return pem_excute_event_chain(eventmgr, eventmgr->event_chain[event], data);
  }
  
  int pem_handle_event(struct pp_eventmgr *eventmgr, enum amd_pp_event event, struct pem_event_data *event_data)
  {
  	int r = 0;
  
  	r = pem_handle_event_unlocked(eventmgr, event, event_data);
  
  	return r;
  }
  
  bool pem_is_hw_access_blocked(struct pp_eventmgr *eventmgr)
  {
  	return (eventmgr->block_adjust_power_state || phm_is_hw_access_blocked(eventmgr->hwmgr));
  }
  