drivers/gpu/drm/msm/adreno/a5xx_power.c

   1 /* Copyright (c) 2016 The Linux Foundation. All rights reserved.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License version 2 and
   5  * only version 2 as published by the Free Software Foundation.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  */
  13
  14 #include <linux/pm_opp.h>
  15 #include "a5xx_gpu.h"
  16
  17 /*
  18  * The GPMU data block is a block of shared registers that can be used to
  19  * communicate back and forth. These "registers" are by convention with the GPMU
  20  * firwmare and not bound to any specific hardware design
  21  */
  22
  23 #define AGC_INIT_BASE REG_A5XX_GPMU_DATA_RAM_BASE
  24 #define AGC_INIT_MSG_MAGIC (AGC_INIT_BASE + 5)
  25 #define AGC_MSG_BASE (AGC_INIT_BASE + 7)
  26
  27 #define AGC_MSG_STATE (AGC_MSG_BASE + 0)
  28 #define AGC_MSG_COMMAND (AGC_MSG_BASE + 1)
  29 #define AGC_MSG_PAYLOAD_SIZE (AGC_MSG_BASE + 3)
  30 #define AGC_MSG_PAYLOAD(_o) ((AGC_MSG_BASE + 5) + (_o))
  31
  32 #define AGC_POWER_CONFIG_PRODUCTION_ID 1
  33 #define AGC_INIT_MSG_VALUE 0xBABEFACE
  34
  35 static struct {
  36         uint32_t reg;
  37         uint32_t value;
  38 } a5xx_sequence_regs[] = {
  39         { 0xB9A1, 0x00010303 },
  40         { 0xB9A2, 0x13000000 },
  41         { 0xB9A3, 0x00460020 },
  42         { 0xB9A4, 0x10000000 },
  43         { 0xB9A5, 0x040A1707 },
  44         { 0xB9A6, 0x00010000 },
  45         { 0xB9A7, 0x0E000904 },
  46         { 0xB9A8, 0x10000000 },
  47         { 0xB9A9, 0x01165000 },
  48         { 0xB9AA, 0x000E0002 },
  49         { 0xB9AB, 0x03884141 },
  50         { 0xB9AC, 0x10000840 },
  51         { 0xB9AD, 0x572A5000 },
  52         { 0xB9AE, 0x00000003 },
  53         { 0xB9AF, 0x00000000 },
  54         { 0xB9B0, 0x10000000 },
  55         { 0xB828, 0x6C204010 },
  56         { 0xB829, 0x6C204011 },
  57         { 0xB82A, 0x6C204012 },
  58         { 0xB82B, 0x6C204013 },
  59         { 0xB82C, 0x6C204014 },
  60         { 0xB90F, 0x00000004 },
  61         { 0xB910, 0x00000002 },
  62         { 0xB911, 0x00000002 },
  63         { 0xB912, 0x00000002 },
  64         { 0xB913, 0x00000002 },
  65         { 0xB92F, 0x00000004 },
  66         { 0xB930, 0x00000005 },
  67         { 0xB931, 0x00000005 },
  68         { 0xB932, 0x00000005 },
  69         { 0xB933, 0x00000005 },
  70         { 0xB96F, 0x00000001 },
  71         { 0xB970, 0x00000003 },
  72         { 0xB94F, 0x00000004 },
  73         { 0xB950, 0x0000000B },
  74         { 0xB951, 0x0000000B },
  75         { 0xB952, 0x0000000B },
  76         { 0xB953, 0x0000000B },
  77         { 0xB907, 0x00000019 },
  78         { 0xB927, 0x00000019 },
  79         { 0xB947, 0x00000019 },
  80         { 0xB967, 0x00000019 },
  81         { 0xB987, 0x00000019 },
  82         { 0xB906, 0x00220001 },
  83         { 0xB926, 0x00220001 },
  84         { 0xB946, 0x00220001 },
  85         { 0xB966, 0x00220001 },
  86         { 0xB986, 0x00300000 },
  87         { 0xAC40, 0x0340FF41 },
  88         { 0xAC41, 0x03BEFED0 },
  89         { 0xAC42, 0x00331FED },
  90         { 0xAC43, 0x021FFDD3 },
  91         { 0xAC44, 0x5555AAAA },
  92         { 0xAC45, 0x5555AAAA },
  93         { 0xB9BA, 0x00000008 },
  94 };
  95
  96 /*
  97  * Get the actual voltage value for the operating point at the specified
  98  * frequency
  99  */
 100 static inline uint32_t _get_mvolts(struct msm_gpu *gpu, uint32_t freq)
 101 {
 102         struct drm_device *dev = gpu->dev;
 103         struct msm_drm_private *priv = dev->dev_private;
 104         struct platform_device *pdev = priv->gpu_pdev;
 105         struct dev_pm_opp *opp;
 106         u32 ret = 0;
 107
 108         opp = dev_pm_opp_find_freq_exact(&pdev->dev, freq, true);
 109
 110         if (!IS_ERR(opp)) {
 111                 ret = dev_pm_opp_get_voltage(opp) / 1000;
 112                 dev_pm_opp_put(opp);
 113         }
 114
 115         return ret;
 116 }
 117
 118 /* Setup thermal limit management */
 119 static void a5xx_lm_setup(struct msm_gpu *gpu)
 120 {
 121         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 122         struct a5xx_gpu *a5xx_gpu = to_a5xx_gpu(adreno_gpu);
 123         unsigned int i;
 124
 125         /* Write the block of sequence registers */
 126         for (i = 0; i < ARRAY_SIZE(a5xx_sequence_regs); i++)
 127                 gpu_write(gpu, a5xx_sequence_regs[i].reg,
 128                         a5xx_sequence_regs[i].value);
 129
 130         /* Hard code the A530 GPU thermal sensor ID for the GPMU */
 131         gpu_write(gpu, REG_A5XX_GPMU_TEMP_SENSOR_ID, 0x60007);
 132         gpu_write(gpu, REG_A5XX_GPMU_DELTA_TEMP_THRESHOLD, 0x01);
 133         gpu_write(gpu, REG_A5XX_GPMU_TEMP_SENSOR_CONFIG, 0x01);
 134
 135         /* Until we get clock scaling 0 is always the active power level */
 136         gpu_write(gpu, REG_A5XX_GPMU_GPMU_VOLTAGE, 0x80000000 | 0);
 137
 138         gpu_write(gpu, REG_A5XX_GPMU_BASE_LEAKAGE, a5xx_gpu->lm_leakage);
 139
 140         /* The threshold is fixed at 6000 for A530 */
 141         gpu_write(gpu, REG_A5XX_GPMU_GPMU_PWR_THRESHOLD, 0x80000000 | 6000);
 142
 143         gpu_write(gpu, REG_A5XX_GPMU_BEC_ENABLE, 0x10001FFF);
 144         gpu_write(gpu, REG_A5XX_GDPM_CONFIG1, 0x00201FF1);
 145
 146         /* Write the voltage table */
 147         gpu_write(gpu, REG_A5XX_GPMU_BEC_ENABLE, 0x10001FFF);
 148         gpu_write(gpu, REG_A5XX_GDPM_CONFIG1, 0x201FF1);
 149
 150         gpu_write(gpu, AGC_MSG_STATE, 1);
 151         gpu_write(gpu, AGC_MSG_COMMAND, AGC_POWER_CONFIG_PRODUCTION_ID);
 152
 153         /* Write the max power - hard coded to 5448 for A530 */
 154         gpu_write(gpu, AGC_MSG_PAYLOAD(0), 5448);
 155         gpu_write(gpu, AGC_MSG_PAYLOAD(1), 1);
 156
 157         /*
 158          * For now just write the one voltage level - we will do more when we
 159          * can do scaling
 160          */
 161         gpu_write(gpu, AGC_MSG_PAYLOAD(2), _get_mvolts(gpu, gpu->fast_rate));
 162         gpu_write(gpu, AGC_MSG_PAYLOAD(3), gpu->fast_rate / 1000000);
 163
 164         gpu_write(gpu, AGC_MSG_PAYLOAD_SIZE, 4 * sizeof(uint32_t));
 165         gpu_write(gpu, AGC_INIT_MSG_MAGIC, AGC_INIT_MSG_VALUE);
 166 }
 167
 168 /* Enable SP/TP cpower collapse */
 169 static void a5xx_pc_init(struct msm_gpu *gpu)
 170 {
 171         gpu_write(gpu, REG_A5XX_GPMU_PWR_COL_INTER_FRAME_CTRL, 0x7F);
 172         gpu_write(gpu, REG_A5XX_GPMU_PWR_COL_BINNING_CTRL, 0);
 173         gpu_write(gpu, REG_A5XX_GPMU_PWR_COL_INTER_FRAME_HYST, 0xA0080);
 174         gpu_write(gpu, REG_A5XX_GPMU_PWR_COL_STAGGER_DELAY, 0x600040);
 175 }
 176
 177 /* Enable the GPMU microcontroller */
 178 static int a5xx_gpmu_init(struct msm_gpu *gpu)
 179 {
 180         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 181         struct a5xx_gpu *a5xx_gpu = to_a5xx_gpu(adreno_gpu);
 182         struct msm_ringbuffer *ring = gpu->rb[0];
 183
 184         if (!a5xx_gpu->gpmu_dwords)
 185                 return 0;
 186
 187         /* Turn off protected mode for this operation */
 188         OUT_PKT7(ring, CP_SET_PROTECTED_MODE, 1);
 189         OUT_RING(ring, 0);
 190
 191         /* Kick off the IB to load the GPMU microcode */
 192         OUT_PKT7(ring, CP_INDIRECT_BUFFER_PFE, 3);
 193         OUT_RING(ring, lower_32_bits(a5xx_gpu->gpmu_iova));
 194         OUT_RING(ring, upper_32_bits(a5xx_gpu->gpmu_iova));
 195         OUT_RING(ring, a5xx_gpu->gpmu_dwords);
 196
 197         /* Turn back on protected mode */
 198         OUT_PKT7(ring, CP_SET_PROTECTED_MODE, 1);
 199         OUT_RING(ring, 1);
 200
 201         gpu->funcs->flush(gpu, ring);
 202
 203         if (!a5xx_idle(gpu, ring)) {
 204                 DRM_ERROR("%s: Unable to load GPMU firmware. GPMU will not be active\n",
 205                         gpu->name);
 206                 return -EINVAL;
 207         }
 208
 209         gpu_write(gpu, REG_A5XX_GPMU_WFI_CONFIG, 0x4014);
 210
 211         /* Kick off the GPMU */
 212         gpu_write(gpu, REG_A5XX_GPMU_CM3_SYSRESET, 0x0);
 213
 214         /*
 215          * Wait for the GPMU to respond. It isn't fatal if it doesn't, we just
 216          * won't have advanced power collapse.
 217          */
 218         if (spin_usecs(gpu, 25, REG_A5XX_GPMU_GENERAL_0, 0xFFFFFFFF,
 219                 0xBABEFACE))
 220                 DRM_ERROR("%s: GPMU firmware initialization timed out\n",
 221                         gpu->name);
 222
 223         return 0;
 224 }
 225
 226 /* Enable limits management */
 227 static void a5xx_lm_enable(struct msm_gpu *gpu)
 228 {
 229         gpu_write(gpu, REG_A5XX_GDPM_INT_MASK, 0x0);
 230         gpu_write(gpu, REG_A5XX_GDPM_INT_EN, 0x0A);
 231         gpu_write(gpu, REG_A5XX_GPMU_GPMU_VOLTAGE_INTR_EN_MASK, 0x01);
 232         gpu_write(gpu, REG_A5XX_GPMU_TEMP_THRESHOLD_INTR_EN_MASK, 0x50000);
 233         gpu_write(gpu, REG_A5XX_GPMU_THROTTLE_UNMASK_FORCE_CTRL, 0x30000);
 234
 235         gpu_write(gpu, REG_A5XX_GPMU_CLOCK_THROTTLE_CTRL, 0x011);
 236 }
 237
 238 int a5xx_power_init(struct msm_gpu *gpu)
 239 {
 240         int ret;
 241
 242         /* Set up the limits management */
 243         a5xx_lm_setup(gpu);
 244
 245         /* Set up SP/TP power collpase */
 246         a5xx_pc_init(gpu);
 247
 248         /* Start the GPMU */
 249         ret = a5xx_gpmu_init(gpu);
 250         if (ret)
 251                 return ret;
 252
 253         /* Start the limits management */
 254         a5xx_lm_enable(gpu);
 255
 256         return 0;
 257 }
 258
 259 void a5xx_gpmu_ucode_init(struct msm_gpu *gpu)
 260 {
 261         struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 262         struct a5xx_gpu *a5xx_gpu = to_a5xx_gpu(adreno_gpu);
 263         struct drm_device *drm = gpu->dev;
 264         const struct firmware *fw;
 265         uint32_t dwords = 0, offset = 0, bosize;
 266         unsigned int *data, *ptr, *cmds;
 267         unsigned int cmds_size;
 268
 269         if (a5xx_gpu->gpmu_bo)
 270                 return;
 271
 272         /* Get the firmware */
 273         fw = adreno_request_fw(adreno_gpu, adreno_gpu->info->gpmufw);
 274         if (IS_ERR(fw)) {
 275                 DRM_ERROR("%s: Could not get GPMU firmware. GPMU will not be active\n",
 276                         gpu->name);
 277                 return;
 278         }
 279
 280         data = (unsigned int *) fw->data;
 281
 282         /*
 283          * The first dword is the size of the remaining data in dwords. Use it
 284          * as a checksum of sorts and make sure it matches the actual size of
 285          * the firmware that we read
 286          */
 287
 288         if (fw->size < 8 || (data[0] < 2) || (data[0] >= (fw->size >> 2)))
 289                 goto out;
 290
 291         /* The second dword is an ID - look for 2 (GPMU_FIRMWARE_ID) */
 292         if (data[1] != 2)
 293                 goto out;
 294
 295         cmds = data + data[2] + 3;
 296         cmds_size = data[0] - data[2] - 2;
 297
 298         /*
 299          * A single type4 opcode can only have so many values attached so
 300          * add enough opcodes to load the all the commands
 301          */
 302         bosize = (cmds_size + (cmds_size / TYPE4_MAX_PAYLOAD) + 1) << 2;
 303
 304         ptr = msm_gem_kernel_new_locked(drm, bosize,
 305                 MSM_BO_UNCACHED | MSM_BO_GPU_READONLY, gpu->aspace,
 306                 &a5xx_gpu->gpmu_bo, &a5xx_gpu->gpmu_iova);
 307         if (IS_ERR(ptr))
 308                 goto err;
 309
 310         while (cmds_size > 0) {
 311                 int i;
 312                 uint32_t _size = cmds_size > TYPE4_MAX_PAYLOAD ?
 313                         TYPE4_MAX_PAYLOAD : cmds_size;
 314
 315                 ptr[dwords++] = PKT4(REG_A5XX_GPMU_INST_RAM_BASE + offset,
 316                         _size);
 317
 318                 for (i = 0; i < _size; i++)
 319                         ptr[dwords++] = *cmds++;
 320
 321                 offset += _size;
 322                 cmds_size -= _size;
 323         }
 324
 325         msm_gem_put_vaddr(a5xx_gpu->gpmu_bo);
 326         a5xx_gpu->gpmu_dwords = dwords;
 327
 328         goto out;
 329
 330 err:
 331         if (a5xx_gpu->gpmu_iova)
 332                 msm_gem_put_iova(a5xx_gpu->gpmu_bo, gpu->aspace);
 333         if (a5xx_gpu->gpmu_bo)
 334                 drm_gem_object_unreference(a5xx_gpu->gpmu_bo);
 335
 336         a5xx_gpu->gpmu_bo = NULL;
 337         a5xx_gpu->gpmu_iova = 0;
 338         a5xx_gpu->gpmu_dwords = 0;
 339
 340 out:
 341         /* No need to keep that firmware laying around anymore */
 342         release_firmware(fw);
 343 }