drivers/gpu/drm/amd/powerplay/eventmgr/eventmgr.c

   1 /*
   2  * Copyright 2015 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  */
  23 #include <linux/types.h>
  24 #include <linux/kernel.h>
  25 #include <linux/slab.h>
  26 #include "eventmgr.h"
  27 #include "hwmgr.h"
  28 #include "eventinit.h"
  29 #include "eventmanagement.h"
  30
  31 static int pem_init(struct pp_eventmgr *eventmgr)
  32 {
  33         int result = 0;
  34         struct pem_event_data event_data = { {0} };
  35
  36         /* Initialize PowerPlay feature info */
  37         pem_init_feature_info(eventmgr);
  38
  39         /* Initialize event action chains */
  40         pem_init_event_action_chains(eventmgr);
  41
  42         /* Call initialization event */
  43         result = pem_handle_event(eventmgr, AMD_PP_EVENT_INITIALIZE, &event_data);
  44
  45         if (0 != result)
  46                 return result;
  47
  48         /* Register interrupt callback functions */
  49         result = pem_register_interrupts(eventmgr);
  50         return 0;
  51 }
  52
  53 static void pem_fini(struct pp_eventmgr *eventmgr)
  54 {
  55         struct pem_event_data event_data = { {0} };
  56
  57         pem_uninit_featureInfo(eventmgr);
  58         pem_unregister_interrupts(eventmgr);
  59
  60         pem_handle_event(eventmgr, AMD_PP_EVENT_UNINITIALIZE, &event_data);
  61
  62         if (eventmgr != NULL)
  63                 kfree(eventmgr);
  64 }
  65
  66 int eventmgr_init(struct pp_instance *handle)
  67 {
  68         int result = 0;
  69         struct pp_eventmgr *eventmgr;
  70
  71         if (handle == NULL)
  72                 return -EINVAL;
  73
  74         eventmgr = kzalloc(sizeof(struct pp_eventmgr), GFP_KERNEL);
  75         if (eventmgr == NULL)
  76                 return -ENOMEM;
  77
  78         eventmgr->hwmgr = handle->hwmgr;
  79         handle->eventmgr = eventmgr;
  80
  81         eventmgr->platform_descriptor = &(eventmgr->hwmgr->platform_descriptor);
  82         eventmgr->pp_eventmgr_init = pem_init;
  83         eventmgr->pp_eventmgr_fini = pem_fini;
  84
  85         return result;
  86 }
  87
  88 int eventmgr_fini(struct pp_eventmgr *eventmgr)
  89 {
  90         kfree(eventmgr);
  91         return 0;
  92 }
  93
  94 static int pem_handle_event_unlocked(struct pp_eventmgr *eventmgr, enum amd_pp_event event, struct pem_event_data *data)
  95 {
  96         if (eventmgr == NULL || event >= AMD_PP_EVENT_MAX || data == NULL)
  97                 return -EINVAL;
  98
  99         return pem_excute_event_chain(eventmgr, eventmgr->event_chain[event], data);
 100 }
 101
 102 int pem_handle_event(struct pp_eventmgr *eventmgr, enum amd_pp_event event, struct pem_event_data *event_data)
 103 {
 104         int r = 0;
 105
 106         r = pem_handle_event_unlocked(eventmgr, event, event_data);
 107
 108         return r;
 109 }
 110
 111 bool pem_is_hw_access_blocked(struct pp_eventmgr *eventmgr)
 112 {
 113         return (eventmgr->block_adjust_power_state || phm_is_hw_access_blocked(eventmgr->hwmgr));
 114 }