drivers/gpu/drm/panfrost/panfrost_device.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright 2018 Marty E. Plummer <hanetzer@startmail.com> */
   3 /* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */
   4
   5 #include <linux/clk.h>
   6 #include <linux/reset.h>
   7 #include <linux/platform_device.h>
   8 #include <linux/regulator/consumer.h>
   9
  10 #include "panfrost_device.h"
  11 #include "panfrost_devfreq.h"
  12 #include "panfrost_features.h"
  13 #include "panfrost_gpu.h"
  14 #include "panfrost_job.h"
  15 #include "panfrost_mmu.h"
  16 #include "panfrost_perfcnt.h"
  17
  18 static int panfrost_reset_init(struct panfrost_device *pfdev)
  19 {
  20         int err;
  21
  22         pfdev->rstc = devm_reset_control_array_get(pfdev->dev, false, true);
  23         if (IS_ERR(pfdev->rstc)) {
  24                 dev_err(pfdev->dev, "get reset failed %ld\n", PTR_ERR(pfdev->rstc));
  25                 return PTR_ERR(pfdev->rstc);
  26         }
  27
  28         err = reset_control_deassert(pfdev->rstc);
  29         if (err)
  30                 return err;
  31
  32         return 0;
  33 }
  34
  35 static void panfrost_reset_fini(struct panfrost_device *pfdev)
  36 {
  37         reset_control_assert(pfdev->rstc);
  38 }
  39
  40 static int panfrost_clk_init(struct panfrost_device *pfdev)
  41 {
  42         int err;
  43         unsigned long rate;
  44
  45         pfdev->clock = devm_clk_get(pfdev->dev, NULL);
  46         if (IS_ERR(pfdev->clock)) {
  47                 dev_err(pfdev->dev, "get clock failed %ld\n", PTR_ERR(pfdev->clock));
  48                 return PTR_ERR(pfdev->clock);
  49         }
  50
  51         rate = clk_get_rate(pfdev->clock);
  52         dev_info(pfdev->dev, "clock rate = %lu\n", rate);
  53
  54         err = clk_prepare_enable(pfdev->clock);
  55         if (err)
  56                 return err;
  57
  58         pfdev->bus_clock = devm_clk_get_optional(pfdev->dev, "bus");
  59         if (IS_ERR(pfdev->bus_clock)) {
  60                 dev_err(pfdev->dev, "get bus_clock failed %ld\n",
  61                         PTR_ERR(pfdev->bus_clock));
  62                 return PTR_ERR(pfdev->bus_clock);
  63         }
  64
  65         if (pfdev->bus_clock) {
  66                 rate = clk_get_rate(pfdev->bus_clock);
  67                 dev_info(pfdev->dev, "bus_clock rate = %lu\n", rate);
  68
  69                 err = clk_prepare_enable(pfdev->bus_clock);
  70                 if (err)
  71                         goto disable_clock;
  72         }
  73
  74         return 0;
  75
  76 disable_clock:
  77         clk_disable_unprepare(pfdev->clock);
  78
  79         return err;
  80 }
  81
  82 static void panfrost_clk_fini(struct panfrost_device *pfdev)
  83 {
  84         clk_disable_unprepare(pfdev->bus_clock);
  85         clk_disable_unprepare(pfdev->clock);
  86 }
  87
  88 static int panfrost_regulator_init(struct panfrost_device *pfdev)
  89 {
  90         int ret;
  91
  92         pfdev->regulator = devm_regulator_get(pfdev->dev, "mali");
  93         if (IS_ERR(pfdev->regulator)) {
  94                 ret = PTR_ERR(pfdev->regulator);
  95                 dev_err(pfdev->dev, "failed to get regulator: %d\n", ret);
  96                 return ret;
  97         }
  98
  99         ret = regulator_enable(pfdev->regulator);
 100         if (ret < 0) {
 101                 dev_err(pfdev->dev, "failed to enable regulator: %d\n", ret);
 102                 return ret;
 103         }
 104
 105         return 0;
 106 }
 107
 108 static void panfrost_regulator_fini(struct panfrost_device *pfdev)
 109 {
 110         regulator_disable(pfdev->regulator);
 111 }
 112
 113 int panfrost_device_init(struct panfrost_device *pfdev)
 114 {
 115         int err;
 116         struct resource *res;
 117
 118         mutex_init(&pfdev->sched_lock);
 119         mutex_init(&pfdev->reset_lock);
 120         INIT_LIST_HEAD(&pfdev->scheduled_jobs);
 121         INIT_LIST_HEAD(&pfdev->as_lru_list);
 122
 123         spin_lock_init(&pfdev->as_lock);
 124
 125         err = panfrost_clk_init(pfdev);
 126         if (err) {
 127                 dev_err(pfdev->dev, "clk init failed %d\n", err);
 128                 return err;
 129         }
 130
 131         err = panfrost_regulator_init(pfdev);
 132         if (err) {
 133                 dev_err(pfdev->dev, "regulator init failed %d\n", err);
 134                 goto err_out0;
 135         }
 136
 137         err = panfrost_reset_init(pfdev);
 138         if (err) {
 139                 dev_err(pfdev->dev, "reset init failed %d\n", err);
 140                 goto err_out1;
 141         }
 142
 143         res = platform_get_resource(pfdev->pdev, IORESOURCE_MEM, 0);
 144         pfdev->iomem = devm_ioremap_resource(pfdev->dev, res);
 145         if (IS_ERR(pfdev->iomem)) {
 146                 dev_err(pfdev->dev, "failed to ioremap iomem\n");
 147                 err = PTR_ERR(pfdev->iomem);
 148                 goto err_out2;
 149         }
 150
 151         err = panfrost_gpu_init(pfdev);
 152         if (err)
 153                 goto err_out2;
 154
 155         err = panfrost_mmu_init(pfdev);
 156         if (err)
 157                 goto err_out3;
 158
 159         err = panfrost_job_init(pfdev);
 160         if (err)
 161                 goto err_out4;
 162
 163         err = panfrost_perfcnt_init(pfdev);
 164         if (err)
 165                 goto err_out5;
 166
 167         return 0;
 168 err_out5:
 169         panfrost_job_fini(pfdev);
 170 err_out4:
 171         panfrost_mmu_fini(pfdev);
 172 err_out3:
 173         panfrost_gpu_fini(pfdev);
 174 err_out2:
 175         panfrost_reset_fini(pfdev);
 176 err_out1:
 177         panfrost_regulator_fini(pfdev);
 178 err_out0:
 179         panfrost_clk_fini(pfdev);
 180         return err;
 181 }
 182
 183 void panfrost_device_fini(struct panfrost_device *pfdev)
 184 {
 185         panfrost_perfcnt_fini(pfdev);
 186         panfrost_job_fini(pfdev);
 187         panfrost_mmu_fini(pfdev);
 188         panfrost_gpu_fini(pfdev);
 189         panfrost_reset_fini(pfdev);
 190         panfrost_regulator_fini(pfdev);
 191         panfrost_clk_fini(pfdev);
 192 }
 193
 194 const char *panfrost_exception_name(struct panfrost_device *pfdev, u32 exception_code)
 195 {
 196         switch (exception_code) {
 197                 /* Non-Fault Status code */
 198         case 0x00: return "NOT_STARTED/IDLE/OK";
 199         case 0x01: return "DONE";
 200         case 0x02: return "INTERRUPTED";
 201         case 0x03: return "STOPPED";
 202         case 0x04: return "TERMINATED";
 203         case 0x08: return "ACTIVE";
 204                 /* Job exceptions */
 205         case 0x40: return "JOB_CONFIG_FAULT";
 206         case 0x41: return "JOB_POWER_FAULT";
 207         case 0x42: return "JOB_READ_FAULT";
 208         case 0x43: return "JOB_WRITE_FAULT";
 209         case 0x44: return "JOB_AFFINITY_FAULT";
 210         case 0x48: return "JOB_BUS_FAULT";
 211         case 0x50: return "INSTR_INVALID_PC";
 212         case 0x51: return "INSTR_INVALID_ENC";
 213         case 0x52: return "INSTR_TYPE_MISMATCH";
 214         case 0x53: return "INSTR_OPERAND_FAULT";
 215         case 0x54: return "INSTR_TLS_FAULT";
 216         case 0x55: return "INSTR_BARRIER_FAULT";
 217         case 0x56: return "INSTR_ALIGN_FAULT";
 218         case 0x58: return "DATA_INVALID_FAULT";
 219         case 0x59: return "TILE_RANGE_FAULT";
 220         case 0x5A: return "ADDR_RANGE_FAULT";
 221         case 0x60: return "OUT_OF_MEMORY";
 222                 /* GPU exceptions */
 223         case 0x80: return "DELAYED_BUS_FAULT";
 224         case 0x88: return "SHAREABILITY_FAULT";
 225                 /* MMU exceptions */
 226         case 0xC1: return "TRANSLATION_FAULT_LEVEL1";
 227         case 0xC2: return "TRANSLATION_FAULT_LEVEL2";
 228         case 0xC3: return "TRANSLATION_FAULT_LEVEL3";
 229         case 0xC4: return "TRANSLATION_FAULT_LEVEL4";
 230         case 0xC8: return "PERMISSION_FAULT";
 231         case 0xC9 ... 0xCF: return "PERMISSION_FAULT";
 232         case 0xD1: return "TRANSTAB_BUS_FAULT_LEVEL1";
 233         case 0xD2: return "TRANSTAB_BUS_FAULT_LEVEL2";
 234         case 0xD3: return "TRANSTAB_BUS_FAULT_LEVEL3";
 235         case 0xD4: return "TRANSTAB_BUS_FAULT_LEVEL4";
 236         case 0xD8: return "ACCESS_FLAG";
 237         case 0xD9 ... 0xDF: return "ACCESS_FLAG";
 238         case 0xE0 ... 0xE7: return "ADDRESS_SIZE_FAULT";
 239         case 0xE8 ... 0xEF: return "MEMORY_ATTRIBUTES_FAULT";
 240         }
 241
 242         return "UNKNOWN";
 243 }
 244
 245 void panfrost_device_reset(struct panfrost_device *pfdev)
 246 {
 247         panfrost_gpu_soft_reset(pfdev);
 248
 249         panfrost_gpu_power_on(pfdev);
 250         panfrost_mmu_reset(pfdev);
 251         panfrost_job_enable_interrupts(pfdev);
 252 }
 253
 254 #ifdef CONFIG_PM
 255 int panfrost_device_resume(struct device *dev)
 256 {
 257         struct platform_device *pdev = to_platform_device(dev);
 258         struct panfrost_device *pfdev = platform_get_drvdata(pdev);
 259
 260         panfrost_device_reset(pfdev);
 261         panfrost_devfreq_resume(pfdev);
 262
 263         return 0;
 264 }
 265
 266 int panfrost_device_suspend(struct device *dev)
 267 {
 268         struct platform_device *pdev = to_platform_device(dev);
 269         struct panfrost_device *pfdev = platform_get_drvdata(pdev);
 270
 271         if (!panfrost_job_is_idle(pfdev))
 272                 return -EBUSY;
 273
 274         panfrost_devfreq_suspend(pfdev);
 275         panfrost_gpu_power_off(pfdev);
 276
 277         return 0;
 278 }
 279 #endif