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/pm_runtime.h>
   9 #include <linux/regulator/consumer.h>
  10
  11 #include "panfrost_device.h"
  12 #include "panfrost_devfreq.h"
  13 #include "panfrost_features.h"
  14 #include "panfrost_gpu.h"
  15 #include "panfrost_job.h"
  16 #include "panfrost_mmu.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         return 0;
  59 }
  60
  61 static void panfrost_clk_fini(struct panfrost_device *pfdev)
  62 {
  63         clk_disable_unprepare(pfdev->clock);
  64 }
  65
  66 static int panfrost_regulator_init(struct panfrost_device *pfdev)
  67 {
  68         int ret;
  69
  70         pfdev->regulator = devm_regulator_get_optional(pfdev->dev, "mali");
  71         if (IS_ERR(pfdev->regulator)) {
  72                 ret = PTR_ERR(pfdev->regulator);
  73                 pfdev->regulator = NULL;
  74                 if (ret == -ENODEV)
  75                         return 0;
  76                 dev_err(pfdev->dev, "failed to get regulator: %d\n", ret);
  77                 return ret;
  78         }
  79
  80         ret = regulator_enable(pfdev->regulator);
  81         if (ret < 0) {
  82                 dev_err(pfdev->dev, "failed to enable regulator: %d\n", ret);
  83                 return ret;
  84         }
  85
  86         return 0;
  87 }
  88
  89 static void panfrost_regulator_fini(struct panfrost_device *pfdev)
  90 {
  91         if (pfdev->regulator)
  92                 regulator_disable(pfdev->regulator);
  93 }
  94
  95 int panfrost_device_init(struct panfrost_device *pfdev)
  96 {
  97         int err;
  98         struct resource *res;
  99
 100         mutex_init(&pfdev->sched_lock);
 101         mutex_init(&pfdev->reset_lock);
 102         INIT_LIST_HEAD(&pfdev->scheduled_jobs);
 103
 104         spin_lock_init(&pfdev->hwaccess_lock);
 105
 106         err = panfrost_clk_init(pfdev);
 107         if (err) {
 108                 dev_err(pfdev->dev, "clk init failed %d\n", err);
 109                 return err;
 110         }
 111
 112         err = panfrost_regulator_init(pfdev);
 113         if (err) {
 114                 dev_err(pfdev->dev, "regulator init failed %d\n", err);
 115                 goto err_out0;
 116         }
 117
 118         err = panfrost_reset_init(pfdev);
 119         if (err) {
 120                 dev_err(pfdev->dev, "reset init failed %d\n", err);
 121                 goto err_out1;
 122         }
 123
 124         res = platform_get_resource(pfdev->pdev, IORESOURCE_MEM, 0);
 125         pfdev->iomem = devm_ioremap_resource(pfdev->dev, res);
 126         if (IS_ERR(pfdev->iomem)) {
 127                 dev_err(pfdev->dev, "failed to ioremap iomem\n");
 128                 err = PTR_ERR(pfdev->iomem);
 129                 goto err_out2;
 130         }
 131
 132         err = panfrost_gpu_init(pfdev);
 133         if (err)
 134                 goto err_out2;
 135
 136         err = panfrost_mmu_init(pfdev);
 137         if (err)
 138                 goto err_out3;
 139
 140         err = panfrost_job_init(pfdev);
 141         if (err)
 142                 goto err_out4;
 143
 144         /* runtime PM will wake us up later */
 145         panfrost_gpu_power_off(pfdev);
 146
 147         pm_runtime_set_active(pfdev->dev);
 148         pm_runtime_get_sync(pfdev->dev);
 149         pm_runtime_mark_last_busy(pfdev->dev);
 150         pm_runtime_put_autosuspend(pfdev->dev);
 151
 152         return 0;
 153 err_out4:
 154         panfrost_mmu_fini(pfdev);
 155 err_out3:
 156         panfrost_gpu_fini(pfdev);
 157 err_out2:
 158         panfrost_reset_fini(pfdev);
 159 err_out1:
 160         panfrost_regulator_fini(pfdev);
 161 err_out0:
 162         panfrost_clk_fini(pfdev);
 163         return err;
 164 }
 165
 166 void panfrost_device_fini(struct panfrost_device *pfdev)
 167 {
 168         panfrost_regulator_fini(pfdev);
 169         panfrost_clk_fini(pfdev);
 170 }
 171
 172 const char *panfrost_exception_name(struct panfrost_device *pfdev, u32 exception_code)
 173 {
 174         switch (exception_code) {
 175                 /* Non-Fault Status code */
 176         case 0x00: return "NOT_STARTED/IDLE/OK";
 177         case 0x01: return "DONE";
 178         case 0x02: return "INTERRUPTED";
 179         case 0x03: return "STOPPED";
 180         case 0x04: return "TERMINATED";
 181         case 0x08: return "ACTIVE";
 182                 /* Job exceptions */
 183         case 0x40: return "JOB_CONFIG_FAULT";
 184         case 0x41: return "JOB_POWER_FAULT";
 185         case 0x42: return "JOB_READ_FAULT";
 186         case 0x43: return "JOB_WRITE_FAULT";
 187         case 0x44: return "JOB_AFFINITY_FAULT";
 188         case 0x48: return "JOB_BUS_FAULT";
 189         case 0x50: return "INSTR_INVALID_PC";
 190         case 0x51: return "INSTR_INVALID_ENC";
 191         case 0x52: return "INSTR_TYPE_MISMATCH";
 192         case 0x53: return "INSTR_OPERAND_FAULT";
 193         case 0x54: return "INSTR_TLS_FAULT";
 194         case 0x55: return "INSTR_BARRIER_FAULT";
 195         case 0x56: return "INSTR_ALIGN_FAULT";
 196         case 0x58: return "DATA_INVALID_FAULT";
 197         case 0x59: return "TILE_RANGE_FAULT";
 198         case 0x5A: return "ADDR_RANGE_FAULT";
 199         case 0x60: return "OUT_OF_MEMORY";
 200                 /* GPU exceptions */
 201         case 0x80: return "DELAYED_BUS_FAULT";
 202         case 0x88: return "SHAREABILITY_FAULT";
 203                 /* MMU exceptions */
 204         case 0xC1: return "TRANSLATION_FAULT_LEVEL1";
 205         case 0xC2: return "TRANSLATION_FAULT_LEVEL2";
 206         case 0xC3: return "TRANSLATION_FAULT_LEVEL3";
 207         case 0xC4: return "TRANSLATION_FAULT_LEVEL4";
 208         case 0xC8: return "PERMISSION_FAULT";
 209         case 0xC9 ... 0xCF: return "PERMISSION_FAULT";
 210         case 0xD1: return "TRANSTAB_BUS_FAULT_LEVEL1";
 211         case 0xD2: return "TRANSTAB_BUS_FAULT_LEVEL2";
 212         case 0xD3: return "TRANSTAB_BUS_FAULT_LEVEL3";
 213         case 0xD4: return "TRANSTAB_BUS_FAULT_LEVEL4";
 214         case 0xD8: return "ACCESS_FLAG";
 215         case 0xD9 ... 0xDF: return "ACCESS_FLAG";
 216         case 0xE0 ... 0xE7: return "ADDRESS_SIZE_FAULT";
 217         case 0xE8 ... 0xEF: return "MEMORY_ATTRIBUTES_FAULT";
 218         }
 219
 220         return "UNKNOWN";
 221 }
 222
 223 #ifdef CONFIG_PM
 224 int panfrost_device_resume(struct device *dev)
 225 {
 226         struct platform_device *pdev = to_platform_device(dev);
 227         struct panfrost_device *pfdev = platform_get_drvdata(pdev);
 228
 229         panfrost_gpu_soft_reset(pfdev);
 230
 231         /* TODO: Re-enable all other address spaces */
 232         panfrost_gpu_power_on(pfdev);
 233         panfrost_mmu_enable(pfdev, 0);
 234         panfrost_job_enable_interrupts(pfdev);
 235         panfrost_devfreq_resume(pfdev);
 236
 237         return 0;
 238 }
 239
 240 int panfrost_device_suspend(struct device *dev)
 241 {
 242         struct platform_device *pdev = to_platform_device(dev);
 243         struct panfrost_device *pfdev = platform_get_drvdata(pdev);
 244
 245         if (!panfrost_job_is_idle(pfdev))
 246                 return -EBUSY;
 247
 248         panfrost_devfreq_suspend(pfdev);
 249         panfrost_gpu_power_off(pfdev);
 250
 251         return 0;
 252 }
 253 #endif