drivers/gpu/drm/panfrost/panfrost_gpu.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 /* Copyright 2019 Collabora ltd. */
   5 #include <linux/bitfield.h>
   6 #include <linux/bitmap.h>
   7 #include <linux/delay.h>
   8 #include <linux/dma-mapping.h>
   9 #include <linux/interrupt.h>
  10 #include <linux/io.h>
  11 #include <linux/iopoll.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/pm_runtime.h>
  14
  15 #include "panfrost_device.h"
  16 #include "panfrost_features.h"
  17 #include "panfrost_issues.h"
  18 #include "panfrost_gpu.h"
  19 #include "panfrost_perfcnt.h"
  20 #include "panfrost_regs.h"
  21
  22 static irqreturn_t panfrost_gpu_irq_handler(int irq, void *data)
  23 {
  24         struct panfrost_device *pfdev = data;
  25         u32 state = gpu_read(pfdev, GPU_INT_STAT);
  26         u32 fault_status = gpu_read(pfdev, GPU_FAULT_STATUS);
  27
  28         if (!state)
  29                 return IRQ_NONE;
  30
  31         if (state & GPU_IRQ_MASK_ERROR) {
  32                 u64 address = (u64) gpu_read(pfdev, GPU_FAULT_ADDRESS_HI) << 32;
  33                 address |= gpu_read(pfdev, GPU_FAULT_ADDRESS_LO);
  34
  35                 dev_warn(pfdev->dev, "GPU Fault 0x%08x (%s) at 0x%016llx\n",
  36                          fault_status & 0xFF, panfrost_exception_name(pfdev, fault_status),
  37                          address);
  38
  39                 if (state & GPU_IRQ_MULTIPLE_FAULT)
  40                         dev_warn(pfdev->dev, "There were multiple GPU faults - some have not been reported\n");
  41
  42                 gpu_write(pfdev, GPU_INT_MASK, 0);
  43         }
  44
  45         if (state & GPU_IRQ_PERFCNT_SAMPLE_COMPLETED)
  46                 panfrost_perfcnt_sample_done(pfdev);
  47
  48         if (state & GPU_IRQ_CLEAN_CACHES_COMPLETED)
  49                 panfrost_perfcnt_clean_cache_done(pfdev);
  50
  51         gpu_write(pfdev, GPU_INT_CLEAR, state);
  52
  53         return IRQ_HANDLED;
  54 }
  55
  56 int panfrost_gpu_soft_reset(struct panfrost_device *pfdev)
  57 {
  58         int ret;
  59         u32 val;
  60
  61         gpu_write(pfdev, GPU_INT_MASK, 0);
  62         gpu_write(pfdev, GPU_INT_CLEAR, GPU_IRQ_RESET_COMPLETED);
  63         gpu_write(pfdev, GPU_CMD, GPU_CMD_SOFT_RESET);
  64
  65         ret = readl_relaxed_poll_timeout(pfdev->iomem + GPU_INT_RAWSTAT,
  66                 val, val & GPU_IRQ_RESET_COMPLETED, 100, 10000);
  67
  68         if (ret) {
  69                 dev_err(pfdev->dev, "gpu soft reset timed out\n");
  70                 return ret;
  71         }
  72
  73         gpu_write(pfdev, GPU_INT_CLEAR, GPU_IRQ_MASK_ALL);
  74         gpu_write(pfdev, GPU_INT_MASK, GPU_IRQ_MASK_ALL);
  75
  76         return 0;
  77 }
  78
  79 static void panfrost_gpu_init_quirks(struct panfrost_device *pfdev)
  80 {
  81         u32 quirks = 0;
  82
  83         if (panfrost_has_hw_issue(pfdev, HW_ISSUE_8443) ||
  84             panfrost_has_hw_issue(pfdev, HW_ISSUE_11035))
  85                 quirks |= SC_LS_PAUSEBUFFER_DISABLE;
  86
  87         if (panfrost_has_hw_issue(pfdev, HW_ISSUE_10327))
  88                 quirks |= SC_SDC_DISABLE_OQ_DISCARD;
  89
  90         if (panfrost_has_hw_issue(pfdev, HW_ISSUE_10797))
  91                 quirks |= SC_ENABLE_TEXGRD_FLAGS;
  92
  93         if (!panfrost_has_hw_issue(pfdev, GPUCORE_1619)) {
  94                 if (panfrost_model_cmp(pfdev, 0x750) < 0) /* T60x, T62x, T72x */
  95                         quirks |= SC_LS_ATTR_CHECK_DISABLE;
  96                 else if (panfrost_model_cmp(pfdev, 0x880) <= 0) /* T76x, T8xx */
  97                         quirks |= SC_LS_ALLOW_ATTR_TYPES;
  98         }
  99
 100         if (panfrost_has_hw_feature(pfdev, HW_FEATURE_TLS_HASHING))
 101                 quirks |= SC_TLS_HASH_ENABLE;
 102
 103         if (quirks)
 104                 gpu_write(pfdev, GPU_SHADER_CONFIG, quirks);
 105
 106
 107         quirks = gpu_read(pfdev, GPU_TILER_CONFIG);
 108
 109         /* Set tiler clock gate override if required */
 110         if (panfrost_has_hw_issue(pfdev, HW_ISSUE_T76X_3953))
 111                 quirks |= TC_CLOCK_GATE_OVERRIDE;
 112
 113         gpu_write(pfdev, GPU_TILER_CONFIG, quirks);
 114
 115
 116         quirks = gpu_read(pfdev, GPU_L2_MMU_CONFIG);
 117
 118         /* Limit read & write ID width for AXI */
 119         if (panfrost_has_hw_feature(pfdev, HW_FEATURE_3BIT_EXT_RW_L2_MMU_CONFIG))
 120                 quirks &= ~(L2_MMU_CONFIG_3BIT_LIMIT_EXTERNAL_READS |
 121                             L2_MMU_CONFIG_3BIT_LIMIT_EXTERNAL_WRITES);
 122         else
 123                 quirks &= ~(L2_MMU_CONFIG_LIMIT_EXTERNAL_READS |
 124                             L2_MMU_CONFIG_LIMIT_EXTERNAL_WRITES);
 125
 126         gpu_write(pfdev, GPU_L2_MMU_CONFIG, quirks);
 127
 128         quirks = 0;
 129         if ((panfrost_model_eq(pfdev, 0x860) || panfrost_model_eq(pfdev, 0x880)) &&
 130             pfdev->features.revision >= 0x2000)
 131                 quirks |= JM_MAX_JOB_THROTTLE_LIMIT << JM_JOB_THROTTLE_LIMIT_SHIFT;
 132         else if (panfrost_model_eq(pfdev, 0x6000) &&
 133                  pfdev->features.coherency_features == COHERENCY_ACE)
 134                 quirks |= (COHERENCY_ACE_LITE | COHERENCY_ACE) <<
 135                            JM_FORCE_COHERENCY_FEATURES_SHIFT;
 136
 137         if (quirks)
 138                 gpu_write(pfdev, GPU_JM_CONFIG, quirks);
 139
 140         /* Here goes platform specific quirks */
 141         if (pfdev->comp->vendor_quirk)
 142                 pfdev->comp->vendor_quirk(pfdev);
 143 }
 144
 145 #define MAX_HW_REVS 6
 146
 147 struct panfrost_model {
 148         const char *name;
 149         u32 id;
 150         u32 id_mask;
 151         u64 features;
 152         u64 issues;
 153         struct {
 154                 u32 revision;
 155                 u64 issues;
 156         } revs[MAX_HW_REVS];
 157 };
 158
 159 #define GPU_MODEL(_name, _id, ...) \
 160 {\
 161         .name = __stringify(_name),                             \
 162         .id = _id,                                              \
 163         .features = hw_features_##_name,                        \
 164         .issues = hw_issues_##_name,                            \
 165         .revs = { __VA_ARGS__ },                                \
 166 }
 167
 168 #define GPU_REV_EXT(name, _rev, _p, _s, stat) \
 169 {\
 170         .revision = (_rev) << 12 | (_p) << 4 | (_s),            \
 171         .issues = hw_issues_##name##_r##_rev##p##_p##stat,      \
 172 }
 173 #define GPU_REV(name, r, p) GPU_REV_EXT(name, r, p, 0, )
 174
 175 static const struct panfrost_model gpu_models[] = {
 176         /* T60x has an oddball version */
 177         GPU_MODEL(t600, 0x600,
 178                 GPU_REV_EXT(t600, 0, 0, 1, _15dev0)),
 179         GPU_MODEL(t620, 0x620,
 180                 GPU_REV(t620, 0, 1), GPU_REV(t620, 1, 0)),
 181         GPU_MODEL(t720, 0x720),
 182         GPU_MODEL(t760, 0x750,
 183                 GPU_REV(t760, 0, 0), GPU_REV(t760, 0, 1),
 184                 GPU_REV_EXT(t760, 0, 1, 0, _50rel0),
 185                 GPU_REV(t760, 0, 2), GPU_REV(t760, 0, 3)),
 186         GPU_MODEL(t820, 0x820),
 187         GPU_MODEL(t830, 0x830),
 188         GPU_MODEL(t860, 0x860),
 189         GPU_MODEL(t880, 0x880),
 190
 191         GPU_MODEL(g71, 0x6000,
 192                 GPU_REV_EXT(g71, 0, 0, 1, _05dev0)),
 193         GPU_MODEL(g72, 0x6001),
 194         GPU_MODEL(g51, 0x7000),
 195         GPU_MODEL(g76, 0x7001),
 196         GPU_MODEL(g52, 0x7002),
 197         GPU_MODEL(g31, 0x7003,
 198                 GPU_REV(g31, 1, 0)),
 199 };
 200
 201 static void panfrost_gpu_init_features(struct panfrost_device *pfdev)
 202 {
 203         u32 gpu_id, num_js, major, minor, status, rev;
 204         const char *name = "unknown";
 205         u64 hw_feat = 0;
 206         u64 hw_issues = hw_issues_all;
 207         const struct panfrost_model *model;
 208         int i;
 209
 210         pfdev->features.l2_features = gpu_read(pfdev, GPU_L2_FEATURES);
 211         pfdev->features.core_features = gpu_read(pfdev, GPU_CORE_FEATURES);
 212         pfdev->features.tiler_features = gpu_read(pfdev, GPU_TILER_FEATURES);
 213         pfdev->features.mem_features = gpu_read(pfdev, GPU_MEM_FEATURES);
 214         pfdev->features.mmu_features = gpu_read(pfdev, GPU_MMU_FEATURES);
 215         pfdev->features.thread_features = gpu_read(pfdev, GPU_THREAD_FEATURES);
 216         pfdev->features.max_threads = gpu_read(pfdev, GPU_THREAD_MAX_THREADS);
 217         pfdev->features.thread_max_workgroup_sz = gpu_read(pfdev, GPU_THREAD_MAX_WORKGROUP_SIZE);
 218         pfdev->features.thread_max_barrier_sz = gpu_read(pfdev, GPU_THREAD_MAX_BARRIER_SIZE);
 219         pfdev->features.coherency_features = gpu_read(pfdev, GPU_COHERENCY_FEATURES);
 220         for (i = 0; i < 4; i++)
 221                 pfdev->features.texture_features[i] = gpu_read(pfdev, GPU_TEXTURE_FEATURES(i));
 222
 223         pfdev->features.as_present = gpu_read(pfdev, GPU_AS_PRESENT);
 224
 225         pfdev->features.js_present = gpu_read(pfdev, GPU_JS_PRESENT);
 226         num_js = hweight32(pfdev->features.js_present);
 227         for (i = 0; i < num_js; i++)
 228                 pfdev->features.js_features[i] = gpu_read(pfdev, GPU_JS_FEATURES(i));
 229
 230         pfdev->features.shader_present = gpu_read(pfdev, GPU_SHADER_PRESENT_LO);
 231         pfdev->features.shader_present |= (u64)gpu_read(pfdev, GPU_SHADER_PRESENT_HI) << 32;
 232
 233         pfdev->features.tiler_present = gpu_read(pfdev, GPU_TILER_PRESENT_LO);
 234         pfdev->features.tiler_present |= (u64)gpu_read(pfdev, GPU_TILER_PRESENT_HI) << 32;
 235
 236         pfdev->features.l2_present = gpu_read(pfdev, GPU_L2_PRESENT_LO);
 237         pfdev->features.l2_present |= (u64)gpu_read(pfdev, GPU_L2_PRESENT_HI) << 32;
 238         pfdev->features.nr_core_groups = hweight64(pfdev->features.l2_present);
 239
 240         pfdev->features.stack_present = gpu_read(pfdev, GPU_STACK_PRESENT_LO);
 241         pfdev->features.stack_present |= (u64)gpu_read(pfdev, GPU_STACK_PRESENT_HI) << 32;
 242
 243         pfdev->features.thread_tls_alloc = gpu_read(pfdev, GPU_THREAD_TLS_ALLOC);
 244
 245         gpu_id = gpu_read(pfdev, GPU_ID);
 246         pfdev->features.revision = gpu_id & 0xffff;
 247         pfdev->features.id = gpu_id >> 16;
 248
 249         /* The T60x has an oddball ID value. Fix it up to the standard Midgard
 250          * format so we (and userspace) don't have to special case it.
 251          */
 252         if (pfdev->features.id == 0x6956)
 253                 pfdev->features.id = 0x0600;
 254
 255         major = (pfdev->features.revision >> 12) & 0xf;
 256         minor = (pfdev->features.revision >> 4) & 0xff;
 257         status = pfdev->features.revision & 0xf;
 258         rev = pfdev->features.revision;
 259
 260         gpu_id = pfdev->features.id;
 261
 262         for (model = gpu_models; model->name; model++) {
 263                 int best = -1;
 264
 265                 if (!panfrost_model_eq(pfdev, model->id))
 266                         continue;
 267
 268                 name = model->name;
 269                 hw_feat = model->features;
 270                 hw_issues |= model->issues;
 271                 for (i = 0; i < MAX_HW_REVS; i++) {
 272                         if (model->revs[i].revision == rev) {
 273                                 best = i;
 274                                 break;
 275                         } else if (model->revs[i].revision == (rev & ~0xf))
 276                                 best = i;
 277                 }
 278
 279                 if (best >= 0)
 280                         hw_issues |= model->revs[best].issues;
 281
 282                 break;
 283         }
 284
 285         bitmap_from_u64(pfdev->features.hw_features, hw_feat);
 286         bitmap_from_u64(pfdev->features.hw_issues, hw_issues);
 287
 288         dev_info(pfdev->dev, "mali-%s id 0x%x major 0x%x minor 0x%x status 0x%x",
 289                  name, gpu_id, major, minor, status);
 290         dev_info(pfdev->dev, "features: %64pb, issues: %64pb",
 291                  pfdev->features.hw_features,
 292                  pfdev->features.hw_issues);
 293
 294         dev_info(pfdev->dev, "Features: L2:0x%08x Shader:0x%08x Tiler:0x%08x Mem:0x%0x MMU:0x%08x AS:0x%x JS:0x%x",
 295                  pfdev->features.l2_features,
 296                  pfdev->features.core_features,
 297                  pfdev->features.tiler_features,
 298                  pfdev->features.mem_features,
 299                  pfdev->features.mmu_features,
 300                  pfdev->features.as_present,
 301                  pfdev->features.js_present);
 302
 303         dev_info(pfdev->dev, "shader_present=0x%0llx l2_present=0x%0llx",
 304                  pfdev->features.shader_present, pfdev->features.l2_present);
 305 }
 306
 307 void panfrost_gpu_power_on(struct panfrost_device *pfdev)
 308 {
 309         int ret;
 310         u32 val;
 311
 312         panfrost_gpu_init_quirks(pfdev);
 313
 314         /* Just turn on everything for now */
 315         gpu_write(pfdev, L2_PWRON_LO, pfdev->features.l2_present);
 316         ret = readl_relaxed_poll_timeout(pfdev->iomem + L2_READY_LO,
 317                 val, val == pfdev->features.l2_present, 100, 1000);
 318         if (ret)
 319                 dev_err(pfdev->dev, "error powering up gpu L2");
 320
 321         gpu_write(pfdev, SHADER_PWRON_LO, pfdev->features.shader_present);
 322         ret = readl_relaxed_poll_timeout(pfdev->iomem + SHADER_READY_LO,
 323                 val, val == pfdev->features.shader_present, 100, 1000);
 324         if (ret)
 325                 dev_err(pfdev->dev, "error powering up gpu shader");
 326
 327         gpu_write(pfdev, TILER_PWRON_LO, pfdev->features.tiler_present);
 328         ret = readl_relaxed_poll_timeout(pfdev->iomem + TILER_READY_LO,
 329                 val, val == pfdev->features.tiler_present, 100, 1000);
 330         if (ret)
 331                 dev_err(pfdev->dev, "error powering up gpu tiler");
 332 }
 333
 334 void panfrost_gpu_power_off(struct panfrost_device *pfdev)
 335 {
 336         gpu_write(pfdev, TILER_PWROFF_LO, 0);
 337         gpu_write(pfdev, SHADER_PWROFF_LO, 0);
 338         gpu_write(pfdev, L2_PWROFF_LO, 0);
 339 }
 340
 341 int panfrost_gpu_init(struct panfrost_device *pfdev)
 342 {
 343         int err, irq;
 344
 345         err = panfrost_gpu_soft_reset(pfdev);
 346         if (err)
 347                 return err;
 348
 349         panfrost_gpu_init_features(pfdev);
 350
 351         dma_set_mask_and_coherent(pfdev->dev,
 352                 DMA_BIT_MASK(FIELD_GET(0xff00, pfdev->features.mmu_features)));
 353         dma_set_max_seg_size(pfdev->dev, UINT_MAX);
 354
 355         irq = platform_get_irq_byname(to_platform_device(pfdev->dev), "gpu");
 356         if (irq <= 0)
 357                 return -ENODEV;
 358
 359         err = devm_request_irq(pfdev->dev, irq, panfrost_gpu_irq_handler,
 360                                IRQF_SHARED, KBUILD_MODNAME "-gpu", pfdev);
 361         if (err) {
 362                 dev_err(pfdev->dev, "failed to request gpu irq");
 363                 return err;
 364         }
 365
 366         panfrost_gpu_power_on(pfdev);
 367
 368         return 0;
 369 }
 370
 371 void panfrost_gpu_fini(struct panfrost_device *pfdev)
 372 {
 373         panfrost_gpu_power_off(pfdev);
 374 }
 375
 376 u32 panfrost_gpu_get_latest_flush_id(struct panfrost_device *pfdev)
 377 {
 378         u32 flush_id;
 379
 380         if (panfrost_has_hw_feature(pfdev, HW_FEATURE_FLUSH_REDUCTION)) {
 381                 /* Flush reduction only makes sense when the GPU is kept powered on between jobs */
 382                 if (pm_runtime_get_if_in_use(pfdev->dev)) {
 383                         flush_id = gpu_read(pfdev, GPU_LATEST_FLUSH_ID);
 384                         pm_runtime_put(pfdev->dev);
 385                         return flush_id;
 386                 }
 387         }
 388
 389         return 0;
 390 }