LXR linux/drivers/gpu/drm/msm/adreno/a5xx

   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
  35static 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 */
 100static 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
 107        opp = dev_pm_opp_find_freq_exact(&pdev->dev, freq, true);
 108
 109        return (!IS_ERR(opp)) ? dev_pm_opp_get_voltage(opp) / 1000 : 0;
 110}
 111
 112/* Setup thermal limit management */
 113static void a5xx_lm_setup(struct msm_gpu *gpu)
 114{
 115        struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 116        struct a5xx_gpu *a5xx_gpu = to_a5xx_gpu(adreno_gpu);
 117        unsigned int i;
 118
 119        /* Write the block of sequence registers */
 120        for (i = 0; i < ARRAY_SIZE(a5xx_sequence_regs); i++)
 121                gpu_write(gpu, a5xx_sequence_regs[i].reg,
 122                        a5xx_sequence_regs[i].value);
 123
 124        /* Hard code the A530 GPU thermal sensor ID for the GPMU */
 125        gpu_write(gpu, REG_A5XX_GPMU_TEMP_SENSOR_ID, 0x60007);
 126        gpu_write(gpu, REG_A5XX_GPMU_DELTA_TEMP_THRESHOLD, 0x01);
 127        gpu_write(gpu, REG_A5XX_GPMU_TEMP_SENSOR_CONFIG, 0x01);
 128
 129        /* Until we get clock scaling 0 is always the active power level */
 130        gpu_write(gpu, REG_A5XX_GPMU_GPMU_VOLTAGE, 0x80000000 | 0);
 131
 132        gpu_write(gpu, REG_A5XX_GPMU_BASE_LEAKAGE, a5xx_gpu->lm_leakage);
 133
 134        /* The threshold is fixed at 6000 for A530 */
 135        gpu_write(gpu, REG_A5XX_GPMU_GPMU_PWR_THRESHOLD, 0x80000000 | 6000);
 136
 137        gpu_write(gpu, REG_A5XX_GPMU_BEC_ENABLE, 0x10001FFF);
 138        gpu_write(gpu, REG_A5XX_GDPM_CONFIG1, 0x00201FF1);
 139
 140        /* Write the voltage table */
 141        gpu_write(gpu, REG_A5XX_GPMU_BEC_ENABLE, 0x10001FFF);
 142        gpu_write(gpu, REG_A5XX_GDPM_CONFIG1, 0x201FF1);
 143
 144        gpu_write(gpu, AGC_MSG_STATE, 1);
 145        gpu_write(gpu, AGC_MSG_COMMAND, AGC_POWER_CONFIG_PRODUCTION_ID);
 146
 147        /* Write the max power - hard coded to 5448 for A530 */
 148        gpu_write(gpu, AGC_MSG_PAYLOAD(0), 5448);
 149        gpu_write(gpu, AGC_MSG_PAYLOAD(1), 1);
 150
 151        /*
 152         * For now just write the one voltage level - we will do more when we
 153         * can do scaling
 154         */
 155        gpu_write(gpu, AGC_MSG_PAYLOAD(2), _get_mvolts(gpu, gpu->fast_rate));
 156        gpu_write(gpu, AGC_MSG_PAYLOAD(3), gpu->fast_rate / 1000000);
 157
 158        gpu_write(gpu, AGC_MSG_PAYLOAD_SIZE, 4 * sizeof(uint32_t));
 159        gpu_write(gpu, AGC_INIT_MSG_MAGIC, AGC_INIT_MSG_VALUE);
 160}
 161
 162/* Enable SP/TP cpower collapse */
 163static void a5xx_pc_init(struct msm_gpu *gpu)
 164{
 165        gpu_write(gpu, REG_A5XX_GPMU_PWR_COL_INTER_FRAME_CTRL, 0x7F);
 166        gpu_write(gpu, REG_A5XX_GPMU_PWR_COL_BINNING_CTRL, 0);
 167        gpu_write(gpu, REG_A5XX_GPMU_PWR_COL_INTER_FRAME_HYST, 0xA0080);
 168        gpu_write(gpu, REG_A5XX_GPMU_PWR_COL_STAGGER_DELAY, 0x600040);
 169}
 170
 171/* Enable the GPMU microcontroller */
 172static int a5xx_gpmu_init(struct msm_gpu *gpu)
 173{
 174        struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 175        struct a5xx_gpu *a5xx_gpu = to_a5xx_gpu(adreno_gpu);
 176        struct msm_ringbuffer *ring = gpu->rb;
 177
 178        if (!a5xx_gpu->gpmu_dwords)
 179                return 0;
 180
 181        /* Turn off protected mode for this operation */
 182        OUT_PKT7(ring, CP_SET_PROTECTED_MODE, 1);
 183        OUT_RING(ring, 0);
 184
 185        /* Kick off the IB to load the GPMU microcode */
 186        OUT_PKT7(ring, CP_INDIRECT_BUFFER_PFE, 3);
 187        OUT_RING(ring, lower_32_bits(a5xx_gpu->gpmu_iova));
 188        OUT_RING(ring, upper_32_bits(a5xx_gpu->gpmu_iova));
 189        OUT_RING(ring, a5xx_gpu->gpmu_dwords);
 190
 191        /* Turn back on protected mode */
 192        OUT_PKT7(ring, CP_SET_PROTECTED_MODE, 1);
 193        OUT_RING(ring, 1);
 194
 195        gpu->funcs->flush(gpu);
 196
 197        if (!a5xx_idle(gpu)) {
 198                DRM_ERROR("%s: Unable to load GPMU firmware. GPMU will not be active\n",
 199                        gpu->name);
 200                return -EINVAL;
 201        }
 202
 203        gpu_write(gpu, REG_A5XX_GPMU_WFI_CONFIG, 0x4014);
 204
 205        /* Kick off the GPMU */
 206        gpu_write(gpu, REG_A5XX_GPMU_CM3_SYSRESET, 0x0);
 207
 208        /*
 209         * Wait for the GPMU to respond. It isn't fatal if it doesn't, we just
 210         * won't have advanced power collapse.
 211         */
 212        if (spin_usecs(gpu, 25, REG_A5XX_GPMU_GENERAL_0, 0xFFFFFFFF,
 213                0xBABEFACE))
 214                DRM_ERROR("%s: GPMU firmware initialization timed out\n",
 215                        gpu->name);
 216
 217        return 0;
 218}
 219
 220/* Enable limits management */
 221static void a5xx_lm_enable(struct msm_gpu *gpu)
 222{
 223        gpu_write(gpu, REG_A5XX_GDPM_INT_MASK, 0x0);
 224        gpu_write(gpu, REG_A5XX_GDPM_INT_EN, 0x0A);
 225        gpu_write(gpu, REG_A5XX_GPMU_GPMU_VOLTAGE_INTR_EN_MASK, 0x01);
 226        gpu_write(gpu, REG_A5XX_GPMU_TEMP_THRESHOLD_INTR_EN_MASK, 0x50000);
 227        gpu_write(gpu, REG_A5XX_GPMU_THROTTLE_UNMASK_FORCE_CTRL, 0x30000);
 228
 229        gpu_write(gpu, REG_A5XX_GPMU_CLOCK_THROTTLE_CTRL, 0x011);
 230}
 231
 232int a5xx_power_init(struct msm_gpu *gpu)
 233{
 234        int ret;
 235
 236        /* Set up the limits management */
 237        a5xx_lm_setup(gpu);
 238
 239        /* Set up SP/TP power collpase */
 240        a5xx_pc_init(gpu);
 241
 242        /* Start the GPMU */
 243        ret = a5xx_gpmu_init(gpu);
 244        if (ret)
 245                return ret;
 246
 247        /* Start the limits management */
 248        a5xx_lm_enable(gpu);
 249
 250        return 0;
 251}
 252
 253void a5xx_gpmu_ucode_init(struct msm_gpu *gpu)
 254{
 255        struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
 256        struct a5xx_gpu *a5xx_gpu = to_a5xx_gpu(adreno_gpu);
 257        struct drm_device *drm = gpu->dev;
 258        const struct firmware *fw;
 259        uint32_t dwords = 0, offset = 0, bosize;
 260        unsigned int *data, *ptr, *cmds;
 261        unsigned int cmds_size;
 262
 263        if (a5xx_gpu->gpmu_bo)
 264                return;
 265
 266        /* Get the firmware */
 267        if (request_firmware(&fw, adreno_gpu->info->gpmufw, drm->dev)) {
 268                DRM_ERROR("%s: Could not get GPMU firmware. GPMU will not be active\n",
 269                        gpu->name);
 270                return;
 271        }
 272
 273        data = (unsigned int *) fw->data;
 274
 275        /*
 276         * The first dword is the size of the remaining data in dwords. Use it
 277         * as a checksum of sorts and make sure it matches the actual size of
 278         * the firmware that we read
 279         */
 280
 281        if (fw->size < 8 || (data[0] < 2) || (data[0] >= (fw->size >> 2)))
 282                goto out;
 283
 284        /* The second dword is an ID - look for 2 (GPMU_FIRMWARE_ID) */
 285        if (data[1] != 2)
 286                goto out;
 287
 288        cmds = data + data[2] + 3;
 289        cmds_size = data[0] - data[2] - 2;
 290
 291        /*
 292         * A single type4 opcode can only have so many values attached so
 293         * add enough opcodes to load the all the commands
 294         */
 295        bosize = (cmds_size + (cmds_size / TYPE4_MAX_PAYLOAD) + 1) << 2;
 296
 297        ptr = msm_gem_kernel_new_locked(drm, bosize,
 298                MSM_BO_UNCACHED | MSM_BO_GPU_READONLY, gpu->aspace,
 299                &a5xx_gpu->gpmu_bo, &a5xx_gpu->gpmu_iova);
 300        if (IS_ERR(ptr))
 301                goto err;
 302
 303        while (cmds_size > 0) {
 304                int i;
 305                uint32_t _size = cmds_size > TYPE4_MAX_PAYLOAD ?
 306                        TYPE4_MAX_PAYLOAD : cmds_size;
 307
 308                ptr[dwords++] = PKT4(REG_A5XX_GPMU_INST_RAM_BASE + offset,
 309                        _size);
 310
 311                for (i = 0; i < _size; i++)
 312                        ptr[dwords++] = *cmds++;
 313
 314                offset += _size;
 315                cmds_size -= _size;
 316        }
 317
 318        msm_gem_put_vaddr(a5xx_gpu->gpmu_bo);
 319        a5xx_gpu->gpmu_dwords = dwords;
 320
 321        goto out;
 322
 323err:
 324        if (a5xx_gpu->gpmu_iova)
 325                msm_gem_put_iova(a5xx_gpu->gpmu_bo, gpu->aspace);
 326        if (a5xx_gpu->gpmu_bo)
 327                drm_gem_object_unreference(a5xx_gpu->gpmu_bo);
 328
 329        a5xx_gpu->gpmu_bo = NULL;
 330        a5xx_gpu->gpmu_iova = 0;
 331        a5xx_gpu->gpmu_dwords = 0;
 332
 333out:
 334        /* No need to keep that firmware laying around anymore */
 335        release_firmware(fw);
 336}
 337