drivers/gpu/drm/amd/amdgpu/si_smc.c

   1 /*
   2  * Copyright 2011 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 <linux/firmware.h>
  26 #include <drm/drmP.h>
  27 #include "amdgpu.h"
  28 #include "sid.h"
  29 #include "ppsmc.h"
  30 #include "amdgpu_ucode.h"
  31 #include "sislands_smc.h"
  32
  33 static int si_set_smc_sram_address(struct amdgpu_device *adev,
  34                                    u32 smc_address, u32 limit)
  35 {
  36         if (smc_address & 3)
  37                 return -EINVAL;
  38         if ((smc_address + 3) > limit)
  39                 return -EINVAL;
  40
  41         WREG32(SMC_IND_INDEX_0, smc_address);
  42         WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0);
  43
  44         return 0;
  45 }
  46
  47 int amdgpu_si_copy_bytes_to_smc(struct amdgpu_device *adev,
  48                                 u32 smc_start_address,
  49                                 const u8 *src, u32 byte_count, u32 limit)
  50 {
  51         unsigned long flags;
  52         int ret = 0;
  53         u32 data, original_data, addr, extra_shift;
  54
  55         if (smc_start_address & 3)
  56                 return -EINVAL;
  57         if ((smc_start_address + byte_count) > limit)
  58                 return -EINVAL;
  59
  60         addr = smc_start_address;
  61
  62         spin_lock_irqsave(&adev->smc_idx_lock, flags);
  63         while (byte_count >= 4) {
  64                 /* SMC address space is BE */
  65                 data = (src[0] << 24) | (src[1] << 16) | (src[2] << 8) | src[3];
  66
  67                 ret = si_set_smc_sram_address(adev, addr, limit);
  68                 if (ret)
  69                         goto done;
  70
  71                 WREG32(SMC_IND_DATA_0, data);
  72
  73                 src += 4;
  74                 byte_count -= 4;
  75                 addr += 4;
  76         }
  77
  78         /* RMW for the final bytes */
  79         if (byte_count > 0) {
  80                 data = 0;
  81
  82                 ret = si_set_smc_sram_address(adev, addr, limit);
  83                 if (ret)
  84                         goto done;
  85
  86                 original_data = RREG32(SMC_IND_DATA_0);
  87                 extra_shift = 8 * (4 - byte_count);
  88
  89                 while (byte_count > 0) {
  90                         /* SMC address space is BE */
  91                         data = (data << 8) + *src++;
  92                         byte_count--;
  93                 }
  94
  95                 data <<= extra_shift;
  96                 data |= (original_data & ~((~0UL) << extra_shift));
  97
  98                 ret = si_set_smc_sram_address(adev, addr, limit);
  99                 if (ret)
 100                         goto done;
 101
 102                 WREG32(SMC_IND_DATA_0, data);
 103         }
 104
 105 done:
 106         spin_unlock_irqrestore(&adev->smc_idx_lock, flags);
 107
 108         return ret;
 109 }
 110
 111 void amdgpu_si_start_smc(struct amdgpu_device *adev)
 112 {
 113         u32 tmp = RREG32_SMC(SMC_SYSCON_RESET_CNTL);
 114
 115         tmp &= ~RST_REG;
 116
 117         WREG32_SMC(SMC_SYSCON_RESET_CNTL, tmp);
 118 }
 119
 120 void amdgpu_si_reset_smc(struct amdgpu_device *adev)
 121 {
 122         u32 tmp;
 123
 124         RREG32(CB_CGTT_SCLK_CTRL);
 125         RREG32(CB_CGTT_SCLK_CTRL);
 126         RREG32(CB_CGTT_SCLK_CTRL);
 127         RREG32(CB_CGTT_SCLK_CTRL);
 128
 129         tmp = RREG32_SMC(SMC_SYSCON_RESET_CNTL) |
 130               RST_REG;
 131         WREG32_SMC(SMC_SYSCON_RESET_CNTL, tmp);
 132 }
 133
 134 int amdgpu_si_program_jump_on_start(struct amdgpu_device *adev)
 135 {
 136         static const u8 data[] = { 0x0E, 0x00, 0x40, 0x40 };
 137
 138         return amdgpu_si_copy_bytes_to_smc(adev, 0x0, data, 4, sizeof(data)+1);
 139 }
 140
 141 void amdgpu_si_smc_clock(struct amdgpu_device *adev, bool enable)
 142 {
 143         u32 tmp = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
 144
 145         if (enable)
 146                 tmp &= ~CK_DISABLE;
 147         else
 148                 tmp |= CK_DISABLE;
 149
 150         WREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0, tmp);
 151 }
 152
 153 bool amdgpu_si_is_smc_running(struct amdgpu_device *adev)
 154 {
 155         u32 rst = RREG32_SMC(SMC_SYSCON_RESET_CNTL);
 156         u32 clk = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
 157
 158         if (!(rst & RST_REG) && !(clk & CK_DISABLE))
 159                 return true;
 160
 161         return false;
 162 }
 163
 164 PPSMC_Result amdgpu_si_send_msg_to_smc(struct amdgpu_device *adev,
 165                                        PPSMC_Msg msg)
 166 {
 167         u32 tmp;
 168         int i;
 169
 170         if (!amdgpu_si_is_smc_running(adev))
 171                 return PPSMC_Result_Failed;
 172
 173         WREG32(SMC_MESSAGE_0, msg);
 174
 175         for (i = 0; i < adev->usec_timeout; i++) {
 176                 tmp = RREG32(SMC_RESP_0);
 177                 if (tmp != 0)
 178                         break;
 179                 udelay(1);
 180         }
 181
 182         return (PPSMC_Result)RREG32(SMC_RESP_0);
 183 }
 184
 185 PPSMC_Result amdgpu_si_wait_for_smc_inactive(struct amdgpu_device *adev)
 186 {
 187         u32 tmp;
 188         int i;
 189
 190         if (!amdgpu_si_is_smc_running(adev))
 191                 return PPSMC_Result_OK;
 192
 193         for (i = 0; i < adev->usec_timeout; i++) {
 194                 tmp = RREG32_SMC(SMC_SYSCON_CLOCK_CNTL_0);
 195                 if ((tmp & CKEN) == 0)
 196                         break;
 197                 udelay(1);
 198         }
 199
 200         return PPSMC_Result_OK;
 201 }
 202
 203 int amdgpu_si_load_smc_ucode(struct amdgpu_device *adev, u32 limit)
 204 {
 205         const struct smc_firmware_header_v1_0 *hdr;
 206         unsigned long flags;
 207         u32 ucode_start_address;
 208         u32 ucode_size;
 209         const u8 *src;
 210         u32 data;
 211
 212         if (!adev->pm.fw)
 213                 return -EINVAL;
 214
 215         hdr = (const struct smc_firmware_header_v1_0 *)adev->pm.fw->data;
 216
 217         amdgpu_ucode_print_smc_hdr(&hdr->header);
 218
 219         adev->pm.fw_version = le32_to_cpu(hdr->header.ucode_version);
 220         ucode_start_address = le32_to_cpu(hdr->ucode_start_addr);
 221         ucode_size = le32_to_cpu(hdr->header.ucode_size_bytes);
 222         src = (const u8 *)
 223                 (adev->pm.fw->data + le32_to_cpu(hdr->header.ucode_array_offset_bytes));
 224         if (ucode_size & 3)
 225                 return -EINVAL;
 226
 227         spin_lock_irqsave(&adev->smc_idx_lock, flags);
 228         WREG32(SMC_IND_INDEX_0, ucode_start_address);
 229         WREG32_P(SMC_IND_ACCESS_CNTL, AUTO_INCREMENT_IND_0, ~AUTO_INCREMENT_IND_0);
 230         while (ucode_size >= 4) {
 231                 /* SMC address space is BE */
 232                 data = (src[0] << 24) | (src[1] << 16) | (src[2] << 8) | src[3];
 233
 234                 WREG32(SMC_IND_DATA_0, data);
 235
 236                 src += 4;
 237                 ucode_size -= 4;
 238         }
 239         WREG32_P(SMC_IND_ACCESS_CNTL, 0, ~AUTO_INCREMENT_IND_0);
 240         spin_unlock_irqrestore(&adev->smc_idx_lock, flags);
 241
 242         return 0;
 243 }
 244
 245 int amdgpu_si_read_smc_sram_dword(struct amdgpu_device *adev, u32 smc_address,
 246                                   u32 *value, u32 limit)
 247 {
 248         unsigned long flags;
 249         int ret;
 250
 251         spin_lock_irqsave(&adev->smc_idx_lock, flags);
 252         ret = si_set_smc_sram_address(adev, smc_address, limit);
 253         if (ret == 0)
 254                 *value = RREG32(SMC_IND_DATA_0);
 255         spin_unlock_irqrestore(&adev->smc_idx_lock, flags);
 256
 257         return ret;
 258 }
 259
 260 int amdgpu_si_write_smc_sram_dword(struct amdgpu_device *adev, u32 smc_address,
 261                                    u32 value, u32 limit)
 262 {
 263         unsigned long flags;
 264         int ret;
 265
 266         spin_lock_irqsave(&adev->smc_idx_lock, flags);
 267         ret = si_set_smc_sram_address(adev, smc_address, limit);
 268         if (ret == 0)
 269                 WREG32(SMC_IND_DATA_0, value);
 270         spin_unlock_irqrestore(&adev->smc_idx_lock, flags);
 271
 272         return ret;
 273 }