drivers/gpu/drm/amd/pm/powerplay/kv_smc.c

   1 /*
   2  * Copyright 2013 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  * Authors: Alex Deucher
  23  */
  24
  25 #include "amdgpu.h"
  26 #include "cikd.h"
  27 #include "kv_dpm.h"
  28
  29 #include "smu/smu_7_0_0_d.h"
  30 #include "smu/smu_7_0_0_sh_mask.h"
  31
  32 int amdgpu_kv_notify_message_to_smu(struct amdgpu_device *adev, u32 id)
  33 {
  34         u32 i;
  35         u32 tmp = 0;
  36
  37         WREG32(mmSMC_MESSAGE_0, id & SMC_MESSAGE_0__SMC_MSG_MASK);
  38
  39         for (i = 0; i < adev->usec_timeout; i++) {
  40                 if ((RREG32(mmSMC_RESP_0) & SMC_RESP_0__SMC_RESP_MASK) != 0)
  41                         break;
  42                 udelay(1);
  43         }
  44         tmp = RREG32(mmSMC_RESP_0) & SMC_RESP_0__SMC_RESP_MASK;
  45
  46         if (tmp != 1) {
  47                 if (tmp == 0xFF)
  48                         return -EINVAL;
  49                 else if (tmp == 0xFE)
  50                         return -EINVAL;
  51         }
  52
  53         return 0;
  54 }
  55
  56 int amdgpu_kv_dpm_get_enable_mask(struct amdgpu_device *adev, u32 *enable_mask)
  57 {
  58         int ret;
  59
  60         ret = amdgpu_kv_notify_message_to_smu(adev, PPSMC_MSG_SCLKDPM_GetEnabledMask);
  61
  62         if (ret == 0)
  63                 *enable_mask = RREG32_SMC(ixSMC_SYSCON_MSG_ARG_0);
  64
  65         return ret;
  66 }
  67
  68 int amdgpu_kv_send_msg_to_smc_with_parameter(struct amdgpu_device *adev,
  69                                       PPSMC_Msg msg, u32 parameter)
  70 {
  71
  72         WREG32(mmSMC_MSG_ARG_0, parameter);
  73
  74         return amdgpu_kv_notify_message_to_smu(adev, msg);
  75 }
  76
  77 static int kv_set_smc_sram_address(struct amdgpu_device *adev,
  78                                    u32 smc_address, u32 limit)
  79 {
  80         if (smc_address & 3)
  81                 return -EINVAL;
  82         if ((smc_address + 3) > limit)
  83                 return -EINVAL;
  84
  85         WREG32(mmSMC_IND_INDEX_0, smc_address);
  86         WREG32_P(mmSMC_IND_ACCESS_CNTL, 0,
  87                         ~SMC_IND_ACCESS_CNTL__AUTO_INCREMENT_IND_0_MASK);
  88
  89         return 0;
  90 }
  91
  92 int amdgpu_kv_read_smc_sram_dword(struct amdgpu_device *adev, u32 smc_address,
  93                            u32 *value, u32 limit)
  94 {
  95         int ret;
  96
  97         ret = kv_set_smc_sram_address(adev, smc_address, limit);
  98         if (ret)
  99                 return ret;
 100
 101         *value = RREG32(mmSMC_IND_DATA_0);
 102         return 0;
 103 }
 104
 105 int amdgpu_kv_smc_dpm_enable(struct amdgpu_device *adev, bool enable)
 106 {
 107         if (enable)
 108                 return amdgpu_kv_notify_message_to_smu(adev, PPSMC_MSG_DPM_Enable);
 109         else
 110                 return amdgpu_kv_notify_message_to_smu(adev, PPSMC_MSG_DPM_Disable);
 111 }
 112
 113 int amdgpu_kv_smc_bapm_enable(struct amdgpu_device *adev, bool enable)
 114 {
 115         if (enable)
 116                 return amdgpu_kv_notify_message_to_smu(adev, PPSMC_MSG_EnableBAPM);
 117         else
 118                 return amdgpu_kv_notify_message_to_smu(adev, PPSMC_MSG_DisableBAPM);
 119 }
 120
 121 int amdgpu_kv_copy_bytes_to_smc(struct amdgpu_device *adev,
 122                          u32 smc_start_address,
 123                          const u8 *src, u32 byte_count, u32 limit)
 124 {
 125         int ret;
 126         u32 data, original_data, addr, extra_shift, t_byte, count, mask;
 127
 128         if ((smc_start_address + byte_count) > limit)
 129                 return -EINVAL;
 130
 131         addr = smc_start_address;
 132         t_byte = addr & 3;
 133
 134         /* RMW for the initial bytes */
 135         if  (t_byte != 0) {
 136                 addr -= t_byte;
 137
 138                 ret = kv_set_smc_sram_address(adev, addr, limit);
 139                 if (ret)
 140                         return ret;
 141
 142                 original_data = RREG32(mmSMC_IND_DATA_0);
 143
 144                 data = 0;
 145                 mask = 0;
 146                 count = 4;
 147                 while (count > 0) {
 148                         if (t_byte > 0) {
 149                                 mask = (mask << 8) | 0xff;
 150                                 t_byte--;
 151                         } else if (byte_count > 0) {
 152                                 data = (data << 8) + *src++;
 153                                 byte_count--;
 154                                 mask <<= 8;
 155                         } else {
 156                                 data <<= 8;
 157                                 mask = (mask << 8) | 0xff;
 158                         }
 159                         count--;
 160                 }
 161
 162                 data |= original_data & mask;
 163
 164                 ret = kv_set_smc_sram_address(adev, addr, limit);
 165                 if (ret)
 166                         return ret;
 167
 168                 WREG32(mmSMC_IND_DATA_0, data);
 169
 170                 addr += 4;
 171         }
 172
 173         while (byte_count >= 4) {
 174                 /* SMC address space is BE */
 175                 data = (src[0] << 24) + (src[1] << 16) + (src[2] << 8) + src[3];
 176
 177                 ret = kv_set_smc_sram_address(adev, addr, limit);
 178                 if (ret)
 179                         return ret;
 180
 181                 WREG32(mmSMC_IND_DATA_0, data);
 182
 183                 src += 4;
 184                 byte_count -= 4;
 185                 addr += 4;
 186         }
 187
 188         /* RMW for the final bytes */
 189         if (byte_count > 0) {
 190                 data = 0;
 191
 192                 ret = kv_set_smc_sram_address(adev, addr, limit);
 193                 if (ret)
 194                         return ret;
 195
 196                 original_data = RREG32(mmSMC_IND_DATA_0);
 197
 198                 extra_shift = 8 * (4 - byte_count);
 199
 200                 while (byte_count > 0) {
 201                         /* SMC address space is BE */
 202                         data = (data << 8) + *src++;
 203                         byte_count--;
 204                 }
 205
 206                 data <<= extra_shift;
 207
 208                 data |= (original_data & ~((~0UL) << extra_shift));
 209
 210                 ret = kv_set_smc_sram_address(adev, addr, limit);
 211                 if (ret)
 212                         return ret;
 213
 214                 WREG32(mmSMC_IND_DATA_0, data);
 215         }
 216         return 0;
 217 }
 218