drivers/gpu/drm/xe/tests/xe_migrate.c

   1 // SPDX-License-Identifier: MIT
   2 /*
   3  * Copyright © 2020-2022 Intel Corporation
   4  */
   5
   6 #include <kunit/test.h>
   7 #include <kunit/visibility.h>
   8
   9 #include "tests/xe_migrate_test.h"
  10 #include "tests/xe_pci_test.h"
  11
  12 #include "xe_pci.h"
  13
  14 static bool sanity_fence_failed(struct xe_device *xe, struct dma_fence *fence,
  15                                 const char *str, struct kunit *test)
  16 {
  17         long ret;
  18
  19         if (IS_ERR(fence)) {
  20                 KUNIT_FAIL(test, "Failed to create fence for %s: %li\n", str,
  21                            PTR_ERR(fence));
  22                 return true;
  23         }
  24         if (!fence)
  25                 return true;
  26
  27         ret = dma_fence_wait_timeout(fence, false, 5 * HZ);
  28         if (ret <= 0) {
  29                 KUNIT_FAIL(test, "Fence timed out for %s: %li\n", str, ret);
  30                 return true;
  31         }
  32
  33         return false;
  34 }
  35
  36 static int run_sanity_job(struct xe_migrate *m, struct xe_device *xe,
  37                           struct xe_bb *bb, u32 second_idx, const char *str,
  38                           struct kunit *test)
  39 {
  40         u64 batch_base = xe_migrate_batch_base(m, xe->info.has_usm);
  41         struct xe_sched_job *job = xe_bb_create_migration_job(m->q, bb,
  42                                                               batch_base,
  43                                                               second_idx);
  44         struct dma_fence *fence;
  45
  46         if (IS_ERR(job)) {
  47                 KUNIT_FAIL(test, "Failed to allocate fake pt: %li\n",
  48                            PTR_ERR(job));
  49                 return PTR_ERR(job);
  50         }
  51
  52         xe_sched_job_arm(job);
  53         fence = dma_fence_get(&job->drm.s_fence->finished);
  54         xe_sched_job_push(job);
  55
  56         if (sanity_fence_failed(xe, fence, str, test))
  57                 return -ETIMEDOUT;
  58
  59         dma_fence_put(fence);
  60         kunit_info(test, "%s: Job completed\n", str);
  61         return 0;
  62 }
  63
  64 static void
  65 sanity_populate_cb(struct xe_migrate_pt_update *pt_update,
  66                    struct xe_tile *tile, struct iosys_map *map, void *dst,
  67                    u32 qword_ofs, u32 num_qwords,
  68                    const struct xe_vm_pgtable_update *update)
  69 {
  70         struct migrate_test_params *p =
  71                 to_migrate_test_params(xe_cur_kunit_priv(XE_TEST_LIVE_MIGRATE));
  72         int i;
  73         u64 *ptr = dst;
  74         u64 value;
  75
  76         for (i = 0; i < num_qwords; i++) {
  77                 value = (qword_ofs + i - update->ofs) * 0x1111111111111111ULL;
  78                 if (map)
  79                         xe_map_wr(tile_to_xe(tile), map, (qword_ofs + i) *
  80                                   sizeof(u64), u64, value);
  81                 else
  82                         ptr[i] = value;
  83         }
  84
  85         kunit_info(xe_cur_kunit(), "Used %s.\n", map ? "CPU" : "GPU");
  86         if (p->force_gpu && map)
  87                 KUNIT_FAIL(xe_cur_kunit(), "GPU pagetable update used CPU.\n");
  88 }
  89
  90 static const struct xe_migrate_pt_update_ops sanity_ops = {
  91         .populate = sanity_populate_cb,
  92 };
  93
  94 #define check(_retval, _expected, str, _test)                           \
  95         do { if ((_retval) != (_expected)) {                            \
  96                         KUNIT_FAIL(_test, "Sanity check failed: " str   \
  97                                    " expected %llx, got %llx\n",        \
  98                                    (u64)(_expected), (u64)(_retval));   \
  99                 } } while (0)
 100
 101 static void test_copy(struct xe_migrate *m, struct xe_bo *bo,
 102                       struct kunit *test, u32 region)
 103 {
 104         struct xe_device *xe = tile_to_xe(m->tile);
 105         u64 retval, expected = 0;
 106         bool big = bo->size >= SZ_2M;
 107         struct dma_fence *fence;
 108         const char *str = big ? "Copying big bo" : "Copying small bo";
 109         int err;
 110
 111         struct xe_bo *remote = xe_bo_create_locked(xe, m->tile, NULL,
 112                                                    bo->size,
 113                                                    ttm_bo_type_kernel,
 114                                                    region |
 115                                                    XE_BO_NEEDS_CPU_ACCESS);
 116         if (IS_ERR(remote)) {
 117                 KUNIT_FAIL(test, "Failed to allocate remote bo for %s: %li\n",
 118                            str, PTR_ERR(remote));
 119                 return;
 120         }
 121
 122         err = xe_bo_validate(remote, NULL, false);
 123         if (err) {
 124                 KUNIT_FAIL(test, "Failed to validate system bo for %s: %li\n",
 125                            str, err);
 126                 goto out_unlock;
 127         }
 128
 129         err = xe_bo_vmap(remote);
 130         if (err) {
 131                 KUNIT_FAIL(test, "Failed to vmap system bo for %s: %li\n",
 132                            str, err);
 133                 goto out_unlock;
 134         }
 135
 136         xe_map_memset(xe, &remote->vmap, 0, 0xd0, remote->size);
 137         fence = xe_migrate_clear(m, remote, remote->ttm.resource);
 138         if (!sanity_fence_failed(xe, fence, big ? "Clearing remote big bo" :
 139                                  "Clearing remote small bo", test)) {
 140                 retval = xe_map_rd(xe, &remote->vmap, 0, u64);
 141                 check(retval, expected, "remote first offset should be cleared",
 142                       test);
 143                 retval = xe_map_rd(xe, &remote->vmap, remote->size - 8, u64);
 144                 check(retval, expected, "remote last offset should be cleared",
 145                       test);
 146         }
 147         dma_fence_put(fence);
 148
 149         /* Try to copy 0xc0 from remote to vram with 2MB or 64KiB/4KiB pages */
 150         xe_map_memset(xe, &remote->vmap, 0, 0xc0, remote->size);
 151         xe_map_memset(xe, &bo->vmap, 0, 0xd0, bo->size);
 152
 153         expected = 0xc0c0c0c0c0c0c0c0;
 154         fence = xe_migrate_copy(m, remote, bo, remote->ttm.resource,
 155                                 bo->ttm.resource, false);
 156         if (!sanity_fence_failed(xe, fence, big ? "Copying big bo remote -> vram" :
 157                                  "Copying small bo remote -> vram", test)) {
 158                 retval = xe_map_rd(xe, &bo->vmap, 0, u64);
 159                 check(retval, expected,
 160                       "remote -> vram bo first offset should be copied", test);
 161                 retval = xe_map_rd(xe, &bo->vmap, bo->size - 8, u64);
 162                 check(retval, expected,
 163                       "remote -> vram bo offset should be copied", test);
 164         }
 165         dma_fence_put(fence);
 166
 167         /* And other way around.. slightly hacky.. */
 168         xe_map_memset(xe, &remote->vmap, 0, 0xd0, remote->size);
 169         xe_map_memset(xe, &bo->vmap, 0, 0xc0, bo->size);
 170
 171         fence = xe_migrate_copy(m, bo, remote, bo->ttm.resource,
 172                                 remote->ttm.resource, false);
 173         if (!sanity_fence_failed(xe, fence, big ? "Copying big bo vram -> remote" :
 174                                  "Copying small bo vram -> remote", test)) {
 175                 retval = xe_map_rd(xe, &remote->vmap, 0, u64);
 176                 check(retval, expected,
 177                       "vram -> remote bo first offset should be copied", test);
 178                 retval = xe_map_rd(xe, &remote->vmap, bo->size - 8, u64);
 179                 check(retval, expected,
 180                       "vram -> remote bo last offset should be copied", test);
 181         }
 182         dma_fence_put(fence);
 183
 184         xe_bo_vunmap(remote);
 185 out_unlock:
 186         xe_bo_unlock(remote);
 187         xe_bo_put(remote);
 188 }
 189
 190 static void test_copy_sysmem(struct xe_migrate *m, struct xe_bo *bo,
 191                              struct kunit *test)
 192 {
 193         test_copy(m, bo, test, XE_BO_CREATE_SYSTEM_BIT);
 194 }
 195
 196 static void test_copy_vram(struct xe_migrate *m, struct xe_bo *bo,
 197                            struct kunit *test)
 198 {
 199         u32 region;
 200
 201         if (bo->ttm.resource->mem_type == XE_PL_SYSTEM)
 202                 return;
 203
 204         if (bo->ttm.resource->mem_type == XE_PL_VRAM0)
 205                 region = XE_BO_CREATE_VRAM1_BIT;
 206         else
 207                 region = XE_BO_CREATE_VRAM0_BIT;
 208         test_copy(m, bo, test, region);
 209 }
 210
 211 static void test_pt_update(struct xe_migrate *m, struct xe_bo *pt,
 212                            struct kunit *test, bool force_gpu)
 213 {
 214         struct xe_device *xe = tile_to_xe(m->tile);
 215         struct dma_fence *fence;
 216         u64 retval, expected;
 217         ktime_t then, now;
 218         int i;
 219
 220         struct xe_vm_pgtable_update update = {
 221                 .ofs = 1,
 222                 .qwords = 0x10,
 223                 .pt_bo = pt,
 224         };
 225         struct xe_migrate_pt_update pt_update = {
 226                 .ops = &sanity_ops,
 227         };
 228         struct migrate_test_params p = {
 229                 .base.id = XE_TEST_LIVE_MIGRATE,
 230                 .force_gpu = force_gpu,
 231         };
 232
 233         test->priv = &p;
 234         /* Test xe_migrate_update_pgtables() updates the pagetable as expected */
 235         expected = 0xf0f0f0f0f0f0f0f0ULL;
 236         xe_map_memset(xe, &pt->vmap, 0, (u8)expected, pt->size);
 237
 238         then = ktime_get();
 239         fence = xe_migrate_update_pgtables(m, m->q->vm, NULL, m->q, &update, 1,
 240                                            NULL, 0, &pt_update);
 241         now = ktime_get();
 242         if (sanity_fence_failed(xe, fence, "Migration pagetable update", test))
 243                 return;
 244
 245         kunit_info(test, "Updating without syncing took %llu us,\n",
 246                    (unsigned long long)ktime_to_us(ktime_sub(now, then)));
 247
 248         dma_fence_put(fence);
 249         retval = xe_map_rd(xe, &pt->vmap, 0, u64);
 250         check(retval, expected, "PTE[0] must stay untouched", test);
 251
 252         for (i = 0; i < update.qwords; i++) {
 253                 retval = xe_map_rd(xe, &pt->vmap, (update.ofs + i) * 8, u64);
 254                 check(retval, i * 0x1111111111111111ULL, "PTE update", test);
 255         }
 256
 257         retval = xe_map_rd(xe, &pt->vmap, 8 * (update.ofs + update.qwords),
 258                            u64);
 259         check(retval, expected, "PTE[0x11] must stay untouched", test);
 260 }
 261
 262 static void xe_migrate_sanity_test(struct xe_migrate *m, struct kunit *test)
 263 {
 264         struct xe_tile *tile = m->tile;
 265         struct xe_device *xe = tile_to_xe(tile);
 266         struct xe_bo *pt, *bo = m->pt_bo, *big, *tiny;
 267         struct xe_res_cursor src_it;
 268         struct dma_fence *fence;
 269         u64 retval, expected;
 270         struct xe_bb *bb;
 271         int err;
 272         u8 id = tile->id;
 273
 274         err = xe_bo_vmap(bo);
 275         if (err) {
 276                 KUNIT_FAIL(test, "Failed to vmap our pagetables: %li\n",
 277                            PTR_ERR(bo));
 278                 return;
 279         }
 280
 281         big = xe_bo_create_pin_map(xe, tile, m->q->vm, SZ_4M,
 282                                    ttm_bo_type_kernel,
 283                                    XE_BO_CREATE_VRAM_IF_DGFX(tile) |
 284                                    XE_BO_CREATE_PINNED_BIT);
 285         if (IS_ERR(big)) {
 286                 KUNIT_FAIL(test, "Failed to allocate bo: %li\n", PTR_ERR(big));
 287                 goto vunmap;
 288         }
 289
 290         pt = xe_bo_create_pin_map(xe, tile, m->q->vm, XE_PAGE_SIZE,
 291                                   ttm_bo_type_kernel,
 292                                   XE_BO_CREATE_VRAM_IF_DGFX(tile) |
 293                                   XE_BO_CREATE_PINNED_BIT);
 294         if (IS_ERR(pt)) {
 295                 KUNIT_FAIL(test, "Failed to allocate fake pt: %li\n",
 296                            PTR_ERR(pt));
 297                 goto free_big;
 298         }
 299
 300         tiny = xe_bo_create_pin_map(xe, tile, m->q->vm,
 301                                     2 * SZ_4K,
 302                                     ttm_bo_type_kernel,
 303                                     XE_BO_CREATE_VRAM_IF_DGFX(tile) |
 304                                     XE_BO_CREATE_PINNED_BIT);
 305         if (IS_ERR(tiny)) {
 306                 KUNIT_FAIL(test, "Failed to allocate fake pt: %li\n",
 307                            PTR_ERR(pt));
 308                 goto free_pt;
 309         }
 310
 311         bb = xe_bb_new(tile->primary_gt, 32, xe->info.has_usm);
 312         if (IS_ERR(bb)) {
 313                 KUNIT_FAIL(test, "Failed to create batchbuffer: %li\n",
 314                            PTR_ERR(bb));
 315                 goto free_tiny;
 316         }
 317
 318         kunit_info(test, "Starting tests, top level PT addr: %lx, special pagetable base addr: %lx\n",
 319                    (unsigned long)xe_bo_main_addr(m->q->vm->pt_root[id]->bo, XE_PAGE_SIZE),
 320                    (unsigned long)xe_bo_main_addr(m->pt_bo, XE_PAGE_SIZE));
 321
 322         /* First part of the test, are we updating our pagetable bo with a new entry? */
 323         xe_map_wr(xe, &bo->vmap, XE_PAGE_SIZE * (NUM_KERNEL_PDE - 1), u64,
 324                   0xdeaddeadbeefbeef);
 325         expected = m->q->vm->pt_ops->pte_encode_bo(pt, 0, xe->pat.idx[XE_CACHE_WB], 0);
 326         if (m->q->vm->flags & XE_VM_FLAG_64K)
 327                 expected |= XE_PTE_PS64;
 328         if (xe_bo_is_vram(pt))
 329                 xe_res_first(pt->ttm.resource, 0, pt->size, &src_it);
 330         else
 331                 xe_res_first_sg(xe_bo_sg(pt), 0, pt->size, &src_it);
 332
 333         emit_pte(m, bb, NUM_KERNEL_PDE - 1, xe_bo_is_vram(pt), false,
 334                  &src_it, XE_PAGE_SIZE, pt->ttm.resource);
 335
 336         run_sanity_job(m, xe, bb, bb->len, "Writing PTE for our fake PT", test);
 337
 338         retval = xe_map_rd(xe, &bo->vmap, XE_PAGE_SIZE * (NUM_KERNEL_PDE - 1),
 339                            u64);
 340         check(retval, expected, "PTE entry write", test);
 341
 342         /* Now try to write data to our newly mapped 'pagetable', see if it succeeds */
 343         bb->len = 0;
 344         bb->cs[bb->len++] = MI_BATCH_BUFFER_END;
 345         xe_map_wr(xe, &pt->vmap, 0, u32, 0xdeaddead);
 346         expected = 0;
 347
 348         emit_clear(tile->primary_gt, bb, xe_migrate_vm_addr(NUM_KERNEL_PDE - 1, 0), 4, 4,
 349                    IS_DGFX(xe));
 350         run_sanity_job(m, xe, bb, 1, "Writing to our newly mapped pagetable",
 351                        test);
 352
 353         retval = xe_map_rd(xe, &pt->vmap, 0, u32);
 354         check(retval, expected, "Write to PT after adding PTE", test);
 355
 356         /* Sanity checks passed, try the full ones! */
 357
 358         /* Clear a small bo */
 359         kunit_info(test, "Clearing small buffer object\n");
 360         xe_map_memset(xe, &tiny->vmap, 0, 0x22, tiny->size);
 361         expected = 0;
 362         fence = xe_migrate_clear(m, tiny, tiny->ttm.resource);
 363         if (sanity_fence_failed(xe, fence, "Clearing small bo", test))
 364                 goto out;
 365
 366         dma_fence_put(fence);
 367         retval = xe_map_rd(xe, &tiny->vmap, 0, u32);
 368         check(retval, expected, "Command clear small first value", test);
 369         retval = xe_map_rd(xe, &tiny->vmap, tiny->size - 4, u32);
 370         check(retval, expected, "Command clear small last value", test);
 371
 372         kunit_info(test, "Copying small buffer object to system\n");
 373         test_copy_sysmem(m, tiny, test);
 374         if (xe->info.tile_count > 1) {
 375                 kunit_info(test, "Copying small buffer object to other vram\n");
 376                 test_copy_vram(m, tiny, test);
 377         }
 378
 379         /* Clear a big bo */
 380         kunit_info(test, "Clearing big buffer object\n");
 381         xe_map_memset(xe, &big->vmap, 0, 0x11, big->size);
 382         expected = 0;
 383         fence = xe_migrate_clear(m, big, big->ttm.resource);
 384         if (sanity_fence_failed(xe, fence, "Clearing big bo", test))
 385                 goto out;
 386
 387         dma_fence_put(fence);
 388         retval = xe_map_rd(xe, &big->vmap, 0, u32);
 389         check(retval, expected, "Command clear big first value", test);
 390         retval = xe_map_rd(xe, &big->vmap, big->size - 4, u32);
 391         check(retval, expected, "Command clear big last value", test);
 392
 393         kunit_info(test, "Copying big buffer object to system\n");
 394         test_copy_sysmem(m, big, test);
 395         if (xe->info.tile_count > 1) {
 396                 kunit_info(test, "Copying big buffer object to other vram\n");
 397                 test_copy_vram(m, big, test);
 398         }
 399
 400         kunit_info(test, "Testing page table update using CPU if GPU idle.\n");
 401         test_pt_update(m, pt, test, false);
 402         kunit_info(test, "Testing page table update using GPU\n");
 403         test_pt_update(m, pt, test, true);
 404
 405 out:
 406         xe_bb_free(bb, NULL);
 407 free_tiny:
 408         xe_bo_unpin(tiny);
 409         xe_bo_put(tiny);
 410 free_pt:
 411         xe_bo_unpin(pt);
 412         xe_bo_put(pt);
 413 free_big:
 414         xe_bo_unpin(big);
 415         xe_bo_put(big);
 416 vunmap:
 417         xe_bo_vunmap(m->pt_bo);
 418 }
 419
 420 static int migrate_test_run_device(struct xe_device *xe)
 421 {
 422         struct kunit *test = xe_cur_kunit();
 423         struct xe_tile *tile;
 424         int id;
 425
 426         for_each_tile(tile, xe, id) {
 427                 struct xe_migrate *m = tile->migrate;
 428
 429                 kunit_info(test, "Testing tile id %d.\n", id);
 430                 xe_vm_lock(m->q->vm, true);
 431                 xe_device_mem_access_get(xe);
 432                 xe_migrate_sanity_test(m, test);
 433                 xe_device_mem_access_put(xe);
 434                 xe_vm_unlock(m->q->vm);
 435         }
 436
 437         return 0;
 438 }
 439
 440 void xe_migrate_sanity_kunit(struct kunit *test)
 441 {
 442         xe_call_for_each_device(migrate_test_run_device);
 443 }
 444 EXPORT_SYMBOL_IF_KUNIT(xe_migrate_sanity_kunit);