drivers/gpu/drm/amd/powerplay/hwmgr/functiontables.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 "hwmgr.h"
  27
  28 static int phm_run_table(struct pp_hwmgr *hwmgr,
  29                          struct phm_runtime_table_header *rt_table,
  30                          void *input,
  31                          void *output,
  32                          void *temp_storage)
  33 {
  34         int result = 0;
  35         phm_table_function *function;
  36
  37         for (function = rt_table->function_list; NULL != *function; function++) {
  38                 int tmp = (*function)(hwmgr, input, output, temp_storage, result);
  39
  40                 if (tmp == PP_Result_TableImmediateExit)
  41                         break;
  42                 if (tmp) {
  43                         if (0 == result)
  44                                 result = tmp;
  45                         if (rt_table->exit_error)
  46                                 break;
  47                 }
  48         }
  49
  50         return result;
  51 }
  52
  53 int phm_dispatch_table(struct pp_hwmgr *hwmgr,
  54                        struct phm_runtime_table_header *rt_table,
  55                        void *input, void *output)
  56 {
  57         int result = 0;
  58         void *temp_storage = NULL;
  59
  60         if (hwmgr == NULL || rt_table == NULL || rt_table->function_list == NULL) {
  61                 printk(KERN_ERR "[ powerplay ] Invalid Parameter!\n");
  62                 return 0; /*temp return ture because some function not implement on some asic */
  63         }
  64
  65         if (0 != rt_table->storage_size) {
  66                 temp_storage = kzalloc(rt_table->storage_size, GFP_KERNEL);
  67                 if (temp_storage == NULL) {
  68                         printk(KERN_ERR "[ powerplay ] Could not allocate table temporary storage\n");
  69                         return -1;
  70                 }
  71         }
  72
  73         result = phm_run_table(hwmgr, rt_table, input, output, temp_storage);
  74
  75         if (NULL != temp_storage)
  76                 kfree(temp_storage);
  77
  78         return result;
  79 }
  80
  81 int phm_construct_table(struct pp_hwmgr *hwmgr,
  82                         struct phm_master_table_header *master_table,
  83                         struct phm_runtime_table_header *rt_table)
  84 {
  85         uint32_t function_count = 0;
  86         const struct phm_master_table_item *table_item;
  87         uint32_t size;
  88         phm_table_function *run_time_list;
  89         phm_table_function *rtf;
  90
  91         if (hwmgr == NULL || master_table == NULL || rt_table == NULL) {
  92                 printk(KERN_ERR "[ powerplay ] Invalid Parameter!\n");
  93                 return -1;
  94         }
  95
  96         for (table_item = master_table->master_list;
  97                 NULL != table_item->tableFunction; table_item++) {
  98                 if ((NULL == table_item->isFunctionNeededInRuntimeTable) ||
  99                     (table_item->isFunctionNeededInRuntimeTable(hwmgr)))
 100                         function_count++;
 101         }
 102
 103         size = (function_count + 1) * sizeof(phm_table_function);
 104         run_time_list = kzalloc(size, GFP_KERNEL);
 105         if (NULL == run_time_list)
 106                 return -1;
 107
 108         rtf = run_time_list;
 109         for (table_item = master_table->master_list;
 110                 NULL != table_item->tableFunction; table_item++) {
 111                 if ((rtf - run_time_list) > function_count) {
 112                         printk(KERN_ERR "[ powerplay ] Check function results have changed\n");
 113                         kfree(run_time_list);
 114                         return -1;
 115                 }
 116
 117                 if ((NULL == table_item->isFunctionNeededInRuntimeTable) ||
 118                      (table_item->isFunctionNeededInRuntimeTable(hwmgr))) {
 119                         *(rtf++) = table_item->tableFunction;
 120                 }
 121         }
 122
 123         if ((rtf - run_time_list) > function_count) {
 124                 printk(KERN_ERR "[ powerplay ] Check function results have changed\n");
 125                 kfree(run_time_list);
 126                 return -1;
 127         }
 128
 129         *rtf = NULL;
 130         rt_table->function_list = run_time_list;
 131         rt_table->exit_error = (0 != (master_table->flags & PHM_MasterTableFlag_ExitOnError));
 132         rt_table->storage_size = master_table->storage_size;
 133         return 0;
 134 }
 135
 136 int phm_destroy_table(struct pp_hwmgr *hwmgr,
 137                       struct phm_runtime_table_header *rt_table)
 138 {
 139         if (hwmgr == NULL || rt_table == NULL) {
 140                 printk(KERN_ERR "[ powerplay ] Invalid Parameter\n");
 141                 return -1;
 142         }
 143
 144         if (NULL == rt_table->function_list)
 145                 return 0;
 146
 147         kfree(rt_table->function_list);
 148
 149         rt_table->function_list = NULL;
 150         rt_table->storage_size = 0;
 151         rt_table->exit_error = false;
 152
 153         return 0;
 154 }