| 1 | // SPDX-License-Identifier: MIT |
| 2 | /* |
| 3 | * Copyright © 2018 Intel Corporation |
| 4 | */ |
| 5 | |
| 6 | #include <linux/prime_numbers.h> |
| 7 | |
| 8 | #include "gem/i915_gem_internal.h" |
| 9 | |
| 10 | #include "i915_drv.h" |
| 11 | #include "i915_selftest.h" |
| 12 | #include "intel_engine_heartbeat.h" |
| 13 | #include "intel_engine_pm.h" |
| 14 | #include "intel_reset.h" |
| 15 | #include "intel_ring.h" |
| 16 | #include "selftest_engine_heartbeat.h" |
| 17 | #include "selftests/i915_random.h" |
| 18 | #include "selftests/igt_flush_test.h" |
| 19 | #include "selftests/igt_live_test.h" |
| 20 | #include "selftests/igt_spinner.h" |
| 21 | #include "selftests/lib_sw_fence.h" |
| 22 | #include "shmem_utils.h" |
| 23 | |
| 24 | #include "gem/selftests/igt_gem_utils.h" |
| 25 | #include "gem/selftests/mock_context.h" |
| 26 | |
| 27 | #define CS_GPR(engine, n) ((engine)->mmio_base + 0x600 + (n) * 4) |
| 28 | #define NUM_GPR 16 |
| 29 | #define NUM_GPR_DW (NUM_GPR * 2) /* each GPR is 2 dwords */ |
| 30 | |
| 31 | #define MI_INSTR(0x22, 0) |
| 32 | #define LRI_LENGTH_MASK GENMASK(7, 0) |
| 33 | |
| 34 | static struct i915_vma *create_scratch(struct intel_gt *gt) |
| 35 | { |
| 36 | return __vm_create_scratch_for_read_pinned(vm: >->ggtt->vm, PAGE_SIZE); |
| 37 | } |
| 38 | |
| 39 | static bool is_active(struct i915_request *rq) |
| 40 | { |
| 41 | if (i915_request_is_active(rq)) |
| 42 | return true; |
| 43 | |
| 44 | if (i915_request_on_hold(rq)) |
| 45 | return true; |
| 46 | |
| 47 | if (i915_request_has_initial_breadcrumb(rq) && i915_request_started(rq)) |
| 48 | return true; |
| 49 | |
| 50 | return false; |
| 51 | } |
| 52 | |
| 53 | static int wait_for_submit(struct intel_engine_cs *engine, |
| 54 | struct i915_request *rq, |
| 55 | unsigned long timeout) |
| 56 | { |
| 57 | /* Ignore our own attempts to suppress excess tasklets */ |
| 58 | tasklet_hi_schedule(t: &engine->sched_engine->tasklet); |
| 59 | |
| 60 | timeout += jiffies; |
| 61 | do { |
| 62 | bool done = time_after(jiffies, timeout); |
| 63 | |
| 64 | if (i915_request_completed(rq)) /* that was quick! */ |
| 65 | return 0; |
| 66 | |
| 67 | /* Wait until the HW has acknowledged the submission (or err) */ |
| 68 | intel_engine_flush_submission(engine); |
| 69 | if (!READ_ONCE(engine->execlists.pending[0]) && is_active(rq)) |
| 70 | return 0; |
| 71 | |
| 72 | if (done) |
| 73 | return -ETIME; |
| 74 | |
| 75 | cond_resched(); |
| 76 | } while (1); |
| 77 | } |
| 78 | |
| 79 | static int emit_semaphore_signal(struct intel_context *ce, void *slot) |
| 80 | { |
| 81 | const u32 offset = |
| 82 | i915_ggtt_offset(vma: ce->engine->status_page.vma) + |
| 83 | offset_in_page(slot); |
| 84 | struct i915_request *rq; |
| 85 | u32 *cs; |
| 86 | |
| 87 | rq = intel_context_create_request(ce); |
| 88 | if (IS_ERR(ptr: rq)) |
| 89 | return PTR_ERR(ptr: rq); |
| 90 | |
| 91 | cs = intel_ring_begin(rq, num_dwords: 4); |
| 92 | if (IS_ERR(ptr: cs)) { |
| 93 | i915_request_add(rq); |
| 94 | return PTR_ERR(ptr: cs); |
| 95 | } |
| 96 | |
| 97 | *cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT; |
| 98 | *cs++ = offset; |
| 99 | *cs++ = 0; |
| 100 | *cs++ = 1; |
| 101 | |
| 102 | intel_ring_advance(rq, cs); |
| 103 | |
| 104 | rq->sched.attr.priority = I915_PRIORITY_BARRIER; |
| 105 | i915_request_add(rq); |
| 106 | return 0; |
| 107 | } |
| 108 | |
| 109 | static int context_flush(struct intel_context *ce, long timeout) |
| 110 | { |
| 111 | struct i915_request *rq; |
| 112 | struct dma_fence *fence; |
| 113 | int err = 0; |
| 114 | |
| 115 | rq = intel_engine_create_kernel_request(engine: ce->engine); |
| 116 | if (IS_ERR(ptr: rq)) |
| 117 | return PTR_ERR(ptr: rq); |
| 118 | |
| 119 | fence = i915_active_fence_get(active: &ce->timeline->last_request); |
| 120 | if (fence) { |
| 121 | i915_request_await_dma_fence(rq, fence); |
| 122 | dma_fence_put(fence); |
| 123 | } |
| 124 | |
| 125 | rq = i915_request_get(rq); |
| 126 | i915_request_add(rq); |
| 127 | if (i915_request_wait(rq, flags: 0, timeout) < 0) |
| 128 | err = -ETIME; |
| 129 | i915_request_put(rq); |
| 130 | |
| 131 | rmb(); /* We know the request is written, make sure all state is too! */ |
| 132 | return err; |
| 133 | } |
| 134 | |
| 135 | static int get_lri_mask(struct intel_engine_cs *engine, u32 lri) |
| 136 | { |
| 137 | if ((lri & MI_LRI_LRM_CS_MMIO) == 0) |
| 138 | return ~0u; |
| 139 | |
| 140 | if (GRAPHICS_VER(engine->i915) < 12) |
| 141 | return 0xfff; |
| 142 | |
| 143 | switch (engine->class) { |
| 144 | default: |
| 145 | case RENDER_CLASS: |
| 146 | case COMPUTE_CLASS: |
| 147 | return 0x07ff; |
| 148 | case COPY_ENGINE_CLASS: |
| 149 | return 0x0fff; |
| 150 | case VIDEO_DECODE_CLASS: |
| 151 | case VIDEO_ENHANCEMENT_CLASS: |
| 152 | return 0x3fff; |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | static int live_lrc_layout(void *arg) |
| 157 | { |
| 158 | struct intel_gt *gt = arg; |
| 159 | struct intel_engine_cs *engine; |
| 160 | enum intel_engine_id id; |
| 161 | u32 *lrc; |
| 162 | int err; |
| 163 | |
| 164 | /* |
| 165 | * Check the registers offsets we use to create the initial reg state |
| 166 | * match the layout saved by HW. |
| 167 | */ |
| 168 | |
| 169 | lrc = (u32 *)__get_free_page(GFP_KERNEL); /* requires page alignment */ |
| 170 | if (!lrc) |
| 171 | return -ENOMEM; |
| 172 | GEM_BUG_ON(offset_in_page(lrc)); |
| 173 | |
| 174 | err = 0; |
| 175 | for_each_engine(engine, gt, id) { |
| 176 | u32 *hw; |
| 177 | int dw; |
| 178 | |
| 179 | if (!engine->default_state) |
| 180 | continue; |
| 181 | |
| 182 | hw = shmem_pin_map(file: engine->default_state); |
| 183 | if (!hw) { |
| 184 | err = -ENOMEM; |
| 185 | break; |
| 186 | } |
| 187 | hw += LRC_STATE_OFFSET / sizeof(*hw); |
| 188 | |
| 189 | __lrc_init_regs(memset(lrc, POISON_INUSE, PAGE_SIZE), |
| 190 | ce: engine->kernel_context, engine, inhibit: true); |
| 191 | |
| 192 | dw = 0; |
| 193 | do { |
| 194 | u32 lri = READ_ONCE(hw[dw]); |
| 195 | u32 lri_mask; |
| 196 | |
| 197 | if (lri == 0) { |
| 198 | dw++; |
| 199 | continue; |
| 200 | } |
| 201 | |
| 202 | if (lrc[dw] == 0) { |
| 203 | pr_debug("%s: skipped instruction %x at dword %d\n" , |
| 204 | engine->name, lri, dw); |
| 205 | dw++; |
| 206 | continue; |
| 207 | } |
| 208 | |
| 209 | if ((lri & GENMASK(31, 23)) != LRI_HEADER) { |
| 210 | pr_err("%s: Expected LRI command at dword %d, found %08x\n" , |
| 211 | engine->name, dw, lri); |
| 212 | err = -EINVAL; |
| 213 | break; |
| 214 | } |
| 215 | |
| 216 | if (lrc[dw] != lri) { |
| 217 | pr_err("%s: LRI command mismatch at dword %d, expected %08x found %08x\n" , |
| 218 | engine->name, dw, lri, lrc[dw]); |
| 219 | err = -EINVAL; |
| 220 | break; |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * When bit 19 of MI_LOAD_REGISTER_IMM instruction |
| 225 | * opcode is set on Gen12+ devices, HW does not |
| 226 | * care about certain register address offsets, and |
| 227 | * instead check the following for valid address |
| 228 | * ranges on specific engines: |
| 229 | * RCS && CCS: BITS(0 - 10) |
| 230 | * BCS: BITS(0 - 11) |
| 231 | * VECS && VCS: BITS(0 - 13) |
| 232 | */ |
| 233 | lri_mask = get_lri_mask(engine, lri); |
| 234 | |
| 235 | lri &= 0x7f; |
| 236 | lri++; |
| 237 | dw++; |
| 238 | |
| 239 | while (lri) { |
| 240 | u32 offset = READ_ONCE(hw[dw]); |
| 241 | |
| 242 | if ((offset ^ lrc[dw]) & lri_mask) { |
| 243 | pr_err("%s: Different registers found at dword %d, expected %x, found %x\n" , |
| 244 | engine->name, dw, offset, lrc[dw]); |
| 245 | err = -EINVAL; |
| 246 | break; |
| 247 | } |
| 248 | |
| 249 | /* |
| 250 | * Skip over the actual register value as we |
| 251 | * expect that to differ. |
| 252 | */ |
| 253 | dw += 2; |
| 254 | lri -= 2; |
| 255 | } |
| 256 | } while (!err && (lrc[dw] & ~BIT(0)) != MI_BATCH_BUFFER_END); |
| 257 | |
| 258 | if (err) { |
| 259 | pr_info("%s: HW register image:\n" , engine->name); |
| 260 | igt_hexdump(buf: hw, PAGE_SIZE); |
| 261 | |
| 262 | pr_info("%s: SW register image:\n" , engine->name); |
| 263 | igt_hexdump(buf: lrc, PAGE_SIZE); |
| 264 | } |
| 265 | |
| 266 | shmem_unpin_map(file: engine->default_state, ptr: hw); |
| 267 | if (err) |
| 268 | break; |
| 269 | } |
| 270 | |
| 271 | free_page((unsigned long)lrc); |
| 272 | return err; |
| 273 | } |
| 274 | |
| 275 | static int find_offset(const u32 *lri, u32 offset) |
| 276 | { |
| 277 | int i; |
| 278 | |
| 279 | for (i = 0; i < PAGE_SIZE / sizeof(u32); i++) |
| 280 | if (lri[i] == offset) |
| 281 | return i; |
| 282 | |
| 283 | return -1; |
| 284 | } |
| 285 | |
| 286 | static int live_lrc_fixed(void *arg) |
| 287 | { |
| 288 | struct intel_gt *gt = arg; |
| 289 | struct intel_engine_cs *engine; |
| 290 | enum intel_engine_id id; |
| 291 | int err = 0; |
| 292 | |
| 293 | /* |
| 294 | * Check the assumed register offsets match the actual locations in |
| 295 | * the context image. |
| 296 | */ |
| 297 | |
| 298 | for_each_engine(engine, gt, id) { |
| 299 | const struct { |
| 300 | u32 reg; |
| 301 | u32 offset; |
| 302 | const char *name; |
| 303 | } tbl[] = { |
| 304 | { |
| 305 | i915_mmio_reg_offset(RING_START(engine->mmio_base)), |
| 306 | CTX_RING_START - 1, |
| 307 | "RING_START" |
| 308 | }, |
| 309 | { |
| 310 | i915_mmio_reg_offset(RING_CTL(engine->mmio_base)), |
| 311 | CTX_RING_CTL - 1, |
| 312 | "RING_CTL" |
| 313 | }, |
| 314 | { |
| 315 | i915_mmio_reg_offset(RING_HEAD(engine->mmio_base)), |
| 316 | CTX_RING_HEAD - 1, |
| 317 | "RING_HEAD" |
| 318 | }, |
| 319 | { |
| 320 | i915_mmio_reg_offset(RING_TAIL(engine->mmio_base)), |
| 321 | CTX_RING_TAIL - 1, |
| 322 | "RING_TAIL" |
| 323 | }, |
| 324 | { |
| 325 | i915_mmio_reg_offset(RING_MI_MODE(engine->mmio_base)), |
| 326 | lrc_ring_mi_mode(engine), |
| 327 | "RING_MI_MODE" |
| 328 | }, |
| 329 | { |
| 330 | i915_mmio_reg_offset(RING_BBSTATE(engine->mmio_base)), |
| 331 | CTX_BB_STATE - 1, |
| 332 | "BB_STATE" |
| 333 | }, |
| 334 | { |
| 335 | i915_mmio_reg_offset(RING_BB_PER_CTX_PTR(engine->mmio_base)), |
| 336 | lrc_ring_wa_bb_per_ctx(engine), |
| 337 | "RING_BB_PER_CTX_PTR" |
| 338 | }, |
| 339 | { |
| 340 | i915_mmio_reg_offset(RING_INDIRECT_CTX(engine->mmio_base)), |
| 341 | lrc_ring_indirect_ptr(engine), |
| 342 | "RING_INDIRECT_CTX_PTR" |
| 343 | }, |
| 344 | { |
| 345 | i915_mmio_reg_offset(RING_INDIRECT_CTX_OFFSET(engine->mmio_base)), |
| 346 | lrc_ring_indirect_offset(engine), |
| 347 | "RING_INDIRECT_CTX_OFFSET" |
| 348 | }, |
| 349 | { |
| 350 | i915_mmio_reg_offset(RING_CTX_TIMESTAMP(engine->mmio_base)), |
| 351 | CTX_TIMESTAMP - 1, |
| 352 | "RING_CTX_TIMESTAMP" |
| 353 | }, |
| 354 | { |
| 355 | i915_mmio_reg_offset(GEN8_RING_CS_GPR(engine->mmio_base, 0)), |
| 356 | lrc_ring_gpr0(engine), |
| 357 | "RING_CS_GPR0" |
| 358 | }, |
| 359 | { |
| 360 | i915_mmio_reg_offset(RING_CMD_BUF_CCTL(engine->mmio_base)), |
| 361 | lrc_ring_cmd_buf_cctl(engine), |
| 362 | "RING_CMD_BUF_CCTL" |
| 363 | }, |
| 364 | { |
| 365 | i915_mmio_reg_offset(RING_BB_OFFSET(engine->mmio_base)), |
| 366 | lrc_ring_bb_offset(engine), |
| 367 | "RING_BB_OFFSET" |
| 368 | }, |
| 369 | { }, |
| 370 | }, *t; |
| 371 | u32 *hw; |
| 372 | |
| 373 | if (!engine->default_state) |
| 374 | continue; |
| 375 | |
| 376 | hw = shmem_pin_map(file: engine->default_state); |
| 377 | if (!hw) { |
| 378 | err = -ENOMEM; |
| 379 | break; |
| 380 | } |
| 381 | hw += LRC_STATE_OFFSET / sizeof(*hw); |
| 382 | |
| 383 | for (t = tbl; t->name; t++) { |
| 384 | int dw = find_offset(lri: hw, offset: t->reg); |
| 385 | |
| 386 | if (dw != t->offset) { |
| 387 | pr_err("%s: Offset for %s [0x%x] mismatch, found %x, expected %x\n" , |
| 388 | engine->name, |
| 389 | t->name, |
| 390 | t->reg, |
| 391 | dw, |
| 392 | t->offset); |
| 393 | err = -EINVAL; |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | shmem_unpin_map(file: engine->default_state, ptr: hw); |
| 398 | } |
| 399 | |
| 400 | return err; |
| 401 | } |
| 402 | |
| 403 | static int __live_lrc_state(struct intel_engine_cs *engine, |
| 404 | struct i915_vma *scratch) |
| 405 | { |
| 406 | struct intel_context *ce; |
| 407 | struct i915_request *rq; |
| 408 | struct i915_gem_ww_ctx ww; |
| 409 | enum { |
| 410 | RING_START_IDX = 0, |
| 411 | RING_TAIL_IDX, |
| 412 | MAX_IDX |
| 413 | }; |
| 414 | u32 expected[MAX_IDX]; |
| 415 | u32 *cs; |
| 416 | int err; |
| 417 | int n; |
| 418 | |
| 419 | ce = intel_context_create(engine); |
| 420 | if (IS_ERR(ptr: ce)) |
| 421 | return PTR_ERR(ptr: ce); |
| 422 | |
| 423 | i915_gem_ww_ctx_init(ctx: &ww, intr: false); |
| 424 | retry: |
| 425 | err = i915_gem_object_lock(obj: scratch->obj, ww: &ww); |
| 426 | if (!err) |
| 427 | err = intel_context_pin_ww(ce, ww: &ww); |
| 428 | if (err) |
| 429 | goto err_put; |
| 430 | |
| 431 | rq = i915_request_create(ce); |
| 432 | if (IS_ERR(ptr: rq)) { |
| 433 | err = PTR_ERR(ptr: rq); |
| 434 | goto err_unpin; |
| 435 | } |
| 436 | |
| 437 | cs = intel_ring_begin(rq, num_dwords: 4 * MAX_IDX); |
| 438 | if (IS_ERR(ptr: cs)) { |
| 439 | err = PTR_ERR(ptr: cs); |
| 440 | i915_request_add(rq); |
| 441 | goto err_unpin; |
| 442 | } |
| 443 | |
| 444 | *cs++ = MI_STORE_REGISTER_MEM_GEN8 | MI_USE_GGTT; |
| 445 | *cs++ = i915_mmio_reg_offset(RING_START(engine->mmio_base)); |
| 446 | *cs++ = i915_ggtt_offset(vma: scratch) + RING_START_IDX * sizeof(u32); |
| 447 | *cs++ = 0; |
| 448 | |
| 449 | expected[RING_START_IDX] = i915_ggtt_offset(vma: ce->ring->vma); |
| 450 | |
| 451 | *cs++ = MI_STORE_REGISTER_MEM_GEN8 | MI_USE_GGTT; |
| 452 | *cs++ = i915_mmio_reg_offset(RING_TAIL(engine->mmio_base)); |
| 453 | *cs++ = i915_ggtt_offset(vma: scratch) + RING_TAIL_IDX * sizeof(u32); |
| 454 | *cs++ = 0; |
| 455 | |
| 456 | err = i915_vma_move_to_active(vma: scratch, rq, EXEC_OBJECT_WRITE); |
| 457 | |
| 458 | i915_request_get(rq); |
| 459 | i915_request_add(rq); |
| 460 | if (err) |
| 461 | goto err_rq; |
| 462 | |
| 463 | intel_engine_flush_submission(engine); |
| 464 | expected[RING_TAIL_IDX] = ce->ring->tail; |
| 465 | |
| 466 | if (i915_request_wait(rq, flags: 0, HZ / 5) < 0) { |
| 467 | err = -ETIME; |
| 468 | goto err_rq; |
| 469 | } |
| 470 | |
| 471 | cs = i915_gem_object_pin_map(obj: scratch->obj, type: I915_MAP_WB); |
| 472 | if (IS_ERR(ptr: cs)) { |
| 473 | err = PTR_ERR(ptr: cs); |
| 474 | goto err_rq; |
| 475 | } |
| 476 | |
| 477 | for (n = 0; n < MAX_IDX; n++) { |
| 478 | if (cs[n] != expected[n]) { |
| 479 | pr_err("%s: Stored register[%d] value[0x%x] did not match expected[0x%x]\n" , |
| 480 | engine->name, n, cs[n], expected[n]); |
| 481 | err = -EINVAL; |
| 482 | break; |
| 483 | } |
| 484 | } |
| 485 | |
| 486 | i915_gem_object_unpin_map(obj: scratch->obj); |
| 487 | |
| 488 | err_rq: |
| 489 | i915_request_put(rq); |
| 490 | err_unpin: |
| 491 | intel_context_unpin(ce); |
| 492 | err_put: |
| 493 | if (err == -EDEADLK) { |
| 494 | err = i915_gem_ww_ctx_backoff(ctx: &ww); |
| 495 | if (!err) |
| 496 | goto retry; |
| 497 | } |
| 498 | i915_gem_ww_ctx_fini(ctx: &ww); |
| 499 | intel_context_put(ce); |
| 500 | return err; |
| 501 | } |
| 502 | |
| 503 | static int live_lrc_state(void *arg) |
| 504 | { |
| 505 | struct intel_gt *gt = arg; |
| 506 | struct intel_engine_cs *engine; |
| 507 | struct i915_vma *scratch; |
| 508 | enum intel_engine_id id; |
| 509 | int err = 0; |
| 510 | |
| 511 | /* |
| 512 | * Check the live register state matches what we expect for this |
| 513 | * intel_context. |
| 514 | */ |
| 515 | |
| 516 | scratch = create_scratch(gt); |
| 517 | if (IS_ERR(ptr: scratch)) |
| 518 | return PTR_ERR(ptr: scratch); |
| 519 | |
| 520 | for_each_engine(engine, gt, id) { |
| 521 | err = __live_lrc_state(engine, scratch); |
| 522 | if (err) |
| 523 | break; |
| 524 | } |
| 525 | |
| 526 | if (igt_flush_test(i915: gt->i915)) |
| 527 | err = -EIO; |
| 528 | |
| 529 | i915_vma_unpin_and_release(p_vma: &scratch, flags: 0); |
| 530 | return err; |
| 531 | } |
| 532 | |
| 533 | static int gpr_make_dirty(struct intel_context *ce) |
| 534 | { |
| 535 | struct i915_request *rq; |
| 536 | u32 *cs; |
| 537 | int n; |
| 538 | |
| 539 | rq = intel_context_create_request(ce); |
| 540 | if (IS_ERR(ptr: rq)) |
| 541 | return PTR_ERR(ptr: rq); |
| 542 | |
| 543 | cs = intel_ring_begin(rq, num_dwords: 2 * NUM_GPR_DW + 2); |
| 544 | if (IS_ERR(ptr: cs)) { |
| 545 | i915_request_add(rq); |
| 546 | return PTR_ERR(ptr: cs); |
| 547 | } |
| 548 | |
| 549 | *cs++ = MI_LOAD_REGISTER_IMM(NUM_GPR_DW); |
| 550 | for (n = 0; n < NUM_GPR_DW; n++) { |
| 551 | *cs++ = CS_GPR(ce->engine, n); |
| 552 | *cs++ = STACK_MAGIC; |
| 553 | } |
| 554 | *cs++ = MI_NOOP; |
| 555 | |
| 556 | intel_ring_advance(rq, cs); |
| 557 | |
| 558 | rq->sched.attr.priority = I915_PRIORITY_BARRIER; |
| 559 | i915_request_add(rq); |
| 560 | |
| 561 | return 0; |
| 562 | } |
| 563 | |
| 564 | static struct i915_request * |
| 565 | __gpr_read(struct intel_context *ce, struct i915_vma *scratch, u32 *slot) |
| 566 | { |
| 567 | const u32 offset = |
| 568 | i915_ggtt_offset(vma: ce->engine->status_page.vma) + |
| 569 | offset_in_page(slot); |
| 570 | struct i915_request *rq; |
| 571 | u32 *cs; |
| 572 | int err; |
| 573 | int n; |
| 574 | |
| 575 | rq = intel_context_create_request(ce); |
| 576 | if (IS_ERR(ptr: rq)) |
| 577 | return rq; |
| 578 | |
| 579 | cs = intel_ring_begin(rq, num_dwords: 6 + 4 * NUM_GPR_DW); |
| 580 | if (IS_ERR(ptr: cs)) { |
| 581 | i915_request_add(rq); |
| 582 | return ERR_CAST(ptr: cs); |
| 583 | } |
| 584 | |
| 585 | *cs++ = MI_ARB_ON_OFF | MI_ARB_ENABLE; |
| 586 | *cs++ = MI_NOOP; |
| 587 | |
| 588 | *cs++ = MI_SEMAPHORE_WAIT | |
| 589 | MI_SEMAPHORE_GLOBAL_GTT | |
| 590 | MI_SEMAPHORE_POLL | |
| 591 | MI_SEMAPHORE_SAD_NEQ_SDD; |
| 592 | *cs++ = 0; |
| 593 | *cs++ = offset; |
| 594 | *cs++ = 0; |
| 595 | |
| 596 | for (n = 0; n < NUM_GPR_DW; n++) { |
| 597 | *cs++ = MI_STORE_REGISTER_MEM_GEN8 | MI_USE_GGTT; |
| 598 | *cs++ = CS_GPR(ce->engine, n); |
| 599 | *cs++ = i915_ggtt_offset(vma: scratch) + n * sizeof(u32); |
| 600 | *cs++ = 0; |
| 601 | } |
| 602 | |
| 603 | err = igt_vma_move_to_active_unlocked(vma: scratch, rq, EXEC_OBJECT_WRITE); |
| 604 | |
| 605 | i915_request_get(rq); |
| 606 | i915_request_add(rq); |
| 607 | if (err) { |
| 608 | i915_request_put(rq); |
| 609 | rq = ERR_PTR(error: err); |
| 610 | } |
| 611 | |
| 612 | return rq; |
| 613 | } |
| 614 | |
| 615 | static int __live_lrc_gpr(struct intel_engine_cs *engine, |
| 616 | struct i915_vma *scratch, |
| 617 | bool preempt) |
| 618 | { |
| 619 | u32 *slot = memset32(s: engine->status_page.addr + 1000, v: 0, n: 4); |
| 620 | struct intel_context *ce; |
| 621 | struct i915_request *rq; |
| 622 | u32 *cs; |
| 623 | int err; |
| 624 | int n; |
| 625 | |
| 626 | if (GRAPHICS_VER(engine->i915) < 9 && engine->class != RENDER_CLASS) |
| 627 | return 0; /* GPR only on rcs0 for gen8 */ |
| 628 | |
| 629 | err = gpr_make_dirty(ce: engine->kernel_context); |
| 630 | if (err) |
| 631 | return err; |
| 632 | |
| 633 | ce = intel_context_create(engine); |
| 634 | if (IS_ERR(ptr: ce)) |
| 635 | return PTR_ERR(ptr: ce); |
| 636 | |
| 637 | rq = __gpr_read(ce, scratch, slot); |
| 638 | if (IS_ERR(ptr: rq)) { |
| 639 | err = PTR_ERR(ptr: rq); |
| 640 | goto err_put; |
| 641 | } |
| 642 | |
| 643 | err = wait_for_submit(engine, rq, HZ / 2); |
| 644 | if (err) |
| 645 | goto err_rq; |
| 646 | |
| 647 | if (preempt) { |
| 648 | err = gpr_make_dirty(ce: engine->kernel_context); |
| 649 | if (err) |
| 650 | goto err_rq; |
| 651 | |
| 652 | err = emit_semaphore_signal(ce: engine->kernel_context, slot); |
| 653 | if (err) |
| 654 | goto err_rq; |
| 655 | |
| 656 | err = wait_for_submit(engine, rq, HZ / 2); |
| 657 | if (err) |
| 658 | goto err_rq; |
| 659 | } else { |
| 660 | slot[0] = 1; |
| 661 | wmb(); |
| 662 | } |
| 663 | |
| 664 | if (i915_request_wait(rq, flags: 0, HZ / 5) < 0) { |
| 665 | err = -ETIME; |
| 666 | goto err_rq; |
| 667 | } |
| 668 | |
| 669 | cs = i915_gem_object_pin_map_unlocked(obj: scratch->obj, type: I915_MAP_WB); |
| 670 | if (IS_ERR(ptr: cs)) { |
| 671 | err = PTR_ERR(ptr: cs); |
| 672 | goto err_rq; |
| 673 | } |
| 674 | |
| 675 | for (n = 0; n < NUM_GPR_DW; n++) { |
| 676 | if (cs[n]) { |
| 677 | pr_err("%s: GPR[%d].%s was not zero, found 0x%08x!\n" , |
| 678 | engine->name, |
| 679 | n / 2, n & 1 ? "udw" : "ldw" , |
| 680 | cs[n]); |
| 681 | err = -EINVAL; |
| 682 | break; |
| 683 | } |
| 684 | } |
| 685 | |
| 686 | i915_gem_object_unpin_map(obj: scratch->obj); |
| 687 | |
| 688 | err_rq: |
| 689 | memset32(s: &slot[0], v: -1, n: 4); |
| 690 | wmb(); |
| 691 | i915_request_put(rq); |
| 692 | err_put: |
| 693 | intel_context_put(ce); |
| 694 | return err; |
| 695 | } |
| 696 | |
| 697 | static int live_lrc_gpr(void *arg) |
| 698 | { |
| 699 | struct intel_gt *gt = arg; |
| 700 | struct intel_engine_cs *engine; |
| 701 | struct i915_vma *scratch; |
| 702 | enum intel_engine_id id; |
| 703 | int err = 0; |
| 704 | |
| 705 | /* |
| 706 | * Check that GPR registers are cleared in new contexts as we need |
| 707 | * to avoid leaking any information from previous contexts. |
| 708 | */ |
| 709 | |
| 710 | scratch = create_scratch(gt); |
| 711 | if (IS_ERR(ptr: scratch)) |
| 712 | return PTR_ERR(ptr: scratch); |
| 713 | |
| 714 | for_each_engine(engine, gt, id) { |
| 715 | st_engine_heartbeat_disable(engine); |
| 716 | |
| 717 | err = __live_lrc_gpr(engine, scratch, preempt: false); |
| 718 | if (err) |
| 719 | goto err; |
| 720 | |
| 721 | err = __live_lrc_gpr(engine, scratch, preempt: true); |
| 722 | if (err) |
| 723 | goto err; |
| 724 | |
| 725 | err: |
| 726 | st_engine_heartbeat_enable(engine); |
| 727 | if (igt_flush_test(i915: gt->i915)) |
| 728 | err = -EIO; |
| 729 | if (err) |
| 730 | break; |
| 731 | } |
| 732 | |
| 733 | i915_vma_unpin_and_release(p_vma: &scratch, flags: 0); |
| 734 | return err; |
| 735 | } |
| 736 | |
| 737 | static struct i915_request * |
| 738 | create_timestamp(struct intel_context *ce, void *slot, int idx) |
| 739 | { |
| 740 | const u32 offset = |
| 741 | i915_ggtt_offset(vma: ce->engine->status_page.vma) + |
| 742 | offset_in_page(slot); |
| 743 | struct i915_request *rq; |
| 744 | u32 *cs; |
| 745 | int err; |
| 746 | |
| 747 | rq = intel_context_create_request(ce); |
| 748 | if (IS_ERR(ptr: rq)) |
| 749 | return rq; |
| 750 | |
| 751 | cs = intel_ring_begin(rq, num_dwords: 10); |
| 752 | if (IS_ERR(ptr: cs)) { |
| 753 | err = PTR_ERR(ptr: cs); |
| 754 | goto err; |
| 755 | } |
| 756 | |
| 757 | *cs++ = MI_ARB_ON_OFF | MI_ARB_ENABLE; |
| 758 | *cs++ = MI_NOOP; |
| 759 | |
| 760 | *cs++ = MI_SEMAPHORE_WAIT | |
| 761 | MI_SEMAPHORE_GLOBAL_GTT | |
| 762 | MI_SEMAPHORE_POLL | |
| 763 | MI_SEMAPHORE_SAD_NEQ_SDD; |
| 764 | *cs++ = 0; |
| 765 | *cs++ = offset; |
| 766 | *cs++ = 0; |
| 767 | |
| 768 | *cs++ = MI_STORE_REGISTER_MEM_GEN8 | MI_USE_GGTT; |
| 769 | *cs++ = i915_mmio_reg_offset(RING_CTX_TIMESTAMP(rq->engine->mmio_base)); |
| 770 | *cs++ = offset + idx * sizeof(u32); |
| 771 | *cs++ = 0; |
| 772 | |
| 773 | intel_ring_advance(rq, cs); |
| 774 | |
| 775 | err = 0; |
| 776 | err: |
| 777 | i915_request_get(rq); |
| 778 | i915_request_add(rq); |
| 779 | if (err) { |
| 780 | i915_request_put(rq); |
| 781 | return ERR_PTR(error: err); |
| 782 | } |
| 783 | |
| 784 | return rq; |
| 785 | } |
| 786 | |
| 787 | struct lrc_timestamp { |
| 788 | struct intel_engine_cs *engine; |
| 789 | struct intel_context *ce[2]; |
| 790 | u32 poison; |
| 791 | }; |
| 792 | |
| 793 | static bool timestamp_advanced(u32 start, u32 end) |
| 794 | { |
| 795 | return (s32)(end - start) > 0; |
| 796 | } |
| 797 | |
| 798 | static int __lrc_timestamp(const struct lrc_timestamp *arg, bool preempt) |
| 799 | { |
| 800 | u32 *slot = memset32(s: arg->engine->status_page.addr + 1000, v: 0, n: 4); |
| 801 | struct i915_request *rq; |
| 802 | u32 timestamp; |
| 803 | int err = 0; |
| 804 | |
| 805 | arg->ce[0]->lrc_reg_state[CTX_TIMESTAMP] = arg->poison; |
| 806 | rq = create_timestamp(ce: arg->ce[0], slot, idx: 1); |
| 807 | if (IS_ERR(ptr: rq)) |
| 808 | return PTR_ERR(ptr: rq); |
| 809 | |
| 810 | err = wait_for_submit(engine: rq->engine, rq, HZ / 2); |
| 811 | if (err) |
| 812 | goto err; |
| 813 | |
| 814 | if (preempt) { |
| 815 | arg->ce[1]->lrc_reg_state[CTX_TIMESTAMP] = 0xdeadbeef; |
| 816 | err = emit_semaphore_signal(ce: arg->ce[1], slot); |
| 817 | if (err) |
| 818 | goto err; |
| 819 | } else { |
| 820 | slot[0] = 1; |
| 821 | wmb(); |
| 822 | } |
| 823 | |
| 824 | /* And wait for switch to kernel (to save our context to memory) */ |
| 825 | err = context_flush(ce: arg->ce[0], HZ / 2); |
| 826 | if (err) |
| 827 | goto err; |
| 828 | |
| 829 | if (!timestamp_advanced(start: arg->poison, end: slot[1])) { |
| 830 | pr_err("%s(%s): invalid timestamp on restore, context:%x, request:%x\n" , |
| 831 | arg->engine->name, preempt ? "preempt" : "simple" , |
| 832 | arg->poison, slot[1]); |
| 833 | err = -EINVAL; |
| 834 | } |
| 835 | |
| 836 | timestamp = READ_ONCE(arg->ce[0]->lrc_reg_state[CTX_TIMESTAMP]); |
| 837 | if (!timestamp_advanced(start: slot[1], end: timestamp)) { |
| 838 | pr_err("%s(%s): invalid timestamp on save, request:%x, context:%x\n" , |
| 839 | arg->engine->name, preempt ? "preempt" : "simple" , |
| 840 | slot[1], timestamp); |
| 841 | err = -EINVAL; |
| 842 | } |
| 843 | |
| 844 | err: |
| 845 | memset32(s: slot, v: -1, n: 4); |
| 846 | i915_request_put(rq); |
| 847 | return err; |
| 848 | } |
| 849 | |
| 850 | static int live_lrc_timestamp(void *arg) |
| 851 | { |
| 852 | struct lrc_timestamp data = {}; |
| 853 | struct intel_gt *gt = arg; |
| 854 | enum intel_engine_id id; |
| 855 | const u32 poison[] = { |
| 856 | 0, |
| 857 | S32_MAX, |
| 858 | (u32)S32_MAX + 1, |
| 859 | U32_MAX, |
| 860 | }; |
| 861 | |
| 862 | /* |
| 863 | * This test was designed to isolate a hardware bug. |
| 864 | * The bug was found and fixed in future generations but |
| 865 | * now the test pollutes our CI on previous generation. |
| 866 | */ |
| 867 | if (GRAPHICS_VER(gt->i915) == 12) |
| 868 | return 0; |
| 869 | |
| 870 | /* |
| 871 | * We want to verify that the timestamp is saved and restore across |
| 872 | * context switches and is monotonic. |
| 873 | * |
| 874 | * So we do this with a little bit of LRC poisoning to check various |
| 875 | * boundary conditions, and see what happens if we preempt the context |
| 876 | * with a second request (carrying more poison into the timestamp). |
| 877 | */ |
| 878 | |
| 879 | for_each_engine(data.engine, gt, id) { |
| 880 | int i, err = 0; |
| 881 | |
| 882 | st_engine_heartbeat_disable(engine: data.engine); |
| 883 | |
| 884 | for (i = 0; i < ARRAY_SIZE(data.ce); i++) { |
| 885 | struct intel_context *tmp; |
| 886 | |
| 887 | tmp = intel_context_create(engine: data.engine); |
| 888 | if (IS_ERR(ptr: tmp)) { |
| 889 | err = PTR_ERR(ptr: tmp); |
| 890 | goto err; |
| 891 | } |
| 892 | |
| 893 | err = intel_context_pin(ce: tmp); |
| 894 | if (err) { |
| 895 | intel_context_put(ce: tmp); |
| 896 | goto err; |
| 897 | } |
| 898 | |
| 899 | data.ce[i] = tmp; |
| 900 | } |
| 901 | |
| 902 | for (i = 0; i < ARRAY_SIZE(poison); i++) { |
| 903 | data.poison = poison[i]; |
| 904 | |
| 905 | err = __lrc_timestamp(arg: &data, preempt: false); |
| 906 | if (err) |
| 907 | break; |
| 908 | |
| 909 | err = __lrc_timestamp(arg: &data, preempt: true); |
| 910 | if (err) |
| 911 | break; |
| 912 | } |
| 913 | |
| 914 | err: |
| 915 | st_engine_heartbeat_enable(engine: data.engine); |
| 916 | for (i = 0; i < ARRAY_SIZE(data.ce); i++) { |
| 917 | if (!data.ce[i]) |
| 918 | break; |
| 919 | |
| 920 | intel_context_unpin(ce: data.ce[i]); |
| 921 | intel_context_put(ce: data.ce[i]); |
| 922 | } |
| 923 | |
| 924 | if (igt_flush_test(i915: gt->i915)) |
| 925 | err = -EIO; |
| 926 | if (err) |
| 927 | return err; |
| 928 | } |
| 929 | |
| 930 | return 0; |
| 931 | } |
| 932 | |
| 933 | static struct i915_vma * |
| 934 | create_user_vma(struct i915_address_space *vm, unsigned long size) |
| 935 | { |
| 936 | struct drm_i915_gem_object *obj; |
| 937 | struct i915_vma *vma; |
| 938 | int err; |
| 939 | |
| 940 | obj = i915_gem_object_create_internal(i915: vm->i915, size); |
| 941 | if (IS_ERR(ptr: obj)) |
| 942 | return ERR_CAST(ptr: obj); |
| 943 | |
| 944 | vma = i915_vma_instance(obj, vm, NULL); |
| 945 | if (IS_ERR(ptr: vma)) { |
| 946 | i915_gem_object_put(obj); |
| 947 | return vma; |
| 948 | } |
| 949 | |
| 950 | err = i915_vma_pin(vma, size: 0, alignment: 0, PIN_USER); |
| 951 | if (err) { |
| 952 | i915_gem_object_put(obj); |
| 953 | return ERR_PTR(error: err); |
| 954 | } |
| 955 | |
| 956 | return vma; |
| 957 | } |
| 958 | |
| 959 | static u32 safe_poison(u32 offset, u32 poison) |
| 960 | { |
| 961 | /* |
| 962 | * Do not enable predication as it will nop all subsequent commands, |
| 963 | * not only disabling the tests (by preventing all the other SRM) but |
| 964 | * also preventing the arbitration events at the end of the request. |
| 965 | */ |
| 966 | if (offset == i915_mmio_reg_offset(RING_PREDICATE_RESULT(0))) |
| 967 | poison &= ~REG_BIT(0); |
| 968 | |
| 969 | return poison; |
| 970 | } |
| 971 | |
| 972 | static struct i915_vma * |
| 973 | store_context(struct intel_context *ce, struct i915_vma *scratch) |
| 974 | { |
| 975 | struct i915_vma *batch; |
| 976 | u32 dw, x, *cs, *hw; |
| 977 | u32 *defaults; |
| 978 | |
| 979 | batch = create_user_vma(vm: ce->vm, SZ_64K); |
| 980 | if (IS_ERR(ptr: batch)) |
| 981 | return batch; |
| 982 | |
| 983 | cs = i915_gem_object_pin_map_unlocked(obj: batch->obj, type: I915_MAP_WC); |
| 984 | if (IS_ERR(ptr: cs)) { |
| 985 | i915_vma_put(vma: batch); |
| 986 | return ERR_CAST(ptr: cs); |
| 987 | } |
| 988 | |
| 989 | defaults = shmem_pin_map(file: ce->engine->default_state); |
| 990 | if (!defaults) { |
| 991 | i915_gem_object_unpin_map(obj: batch->obj); |
| 992 | i915_vma_put(vma: batch); |
| 993 | return ERR_PTR(error: -ENOMEM); |
| 994 | } |
| 995 | |
| 996 | x = 0; |
| 997 | dw = 0; |
| 998 | hw = defaults; |
| 999 | hw += LRC_STATE_OFFSET / sizeof(*hw); |
| 1000 | do { |
| 1001 | u32 len = hw[dw] & LRI_LENGTH_MASK; |
| 1002 | |
| 1003 | /* |
| 1004 | * Keep it simple, skip parsing complex commands |
| 1005 | * |
| 1006 | * At present, there are no more MI_LOAD_REGISTER_IMM |
| 1007 | * commands after the first 3D state command. Rather |
| 1008 | * than include a table (see i915_cmd_parser.c) of all |
| 1009 | * the possible commands and their instruction lengths |
| 1010 | * (or mask for variable length instructions), assume |
| 1011 | * we have gathered the complete list of registers and |
| 1012 | * bail out. |
| 1013 | */ |
| 1014 | if ((hw[dw] >> INSTR_CLIENT_SHIFT) != INSTR_MI_CLIENT) |
| 1015 | break; |
| 1016 | |
| 1017 | if (hw[dw] == 0) { |
| 1018 | dw++; |
| 1019 | continue; |
| 1020 | } |
| 1021 | |
| 1022 | if ((hw[dw] & GENMASK(31, 23)) != LRI_HEADER) { |
| 1023 | /* Assume all other MI commands match LRI length mask */ |
| 1024 | dw += len + 2; |
| 1025 | continue; |
| 1026 | } |
| 1027 | |
| 1028 | if (!len) { |
| 1029 | pr_err("%s: invalid LRI found in context image\n" , |
| 1030 | ce->engine->name); |
| 1031 | igt_hexdump(buf: defaults, PAGE_SIZE); |
| 1032 | break; |
| 1033 | } |
| 1034 | |
| 1035 | dw++; |
| 1036 | len = (len + 1) / 2; |
| 1037 | while (len--) { |
| 1038 | *cs++ = MI_STORE_REGISTER_MEM_GEN8; |
| 1039 | *cs++ = hw[dw]; |
| 1040 | *cs++ = lower_32_bits(i915_vma_offset(scratch) + x); |
| 1041 | *cs++ = upper_32_bits(i915_vma_offset(scratch) + x); |
| 1042 | |
| 1043 | dw += 2; |
| 1044 | x += 4; |
| 1045 | } |
| 1046 | } while (dw < PAGE_SIZE / sizeof(u32) && |
| 1047 | (hw[dw] & ~BIT(0)) != MI_BATCH_BUFFER_END); |
| 1048 | |
| 1049 | *cs++ = MI_BATCH_BUFFER_END; |
| 1050 | |
| 1051 | shmem_unpin_map(file: ce->engine->default_state, ptr: defaults); |
| 1052 | |
| 1053 | i915_gem_object_flush_map(obj: batch->obj); |
| 1054 | i915_gem_object_unpin_map(obj: batch->obj); |
| 1055 | |
| 1056 | return batch; |
| 1057 | } |
| 1058 | |
| 1059 | static struct i915_request * |
| 1060 | record_registers(struct intel_context *ce, |
| 1061 | struct i915_vma *before, |
| 1062 | struct i915_vma *after, |
| 1063 | u32 *sema) |
| 1064 | { |
| 1065 | struct i915_vma *b_before, *b_after; |
| 1066 | struct i915_request *rq; |
| 1067 | u32 *cs; |
| 1068 | int err; |
| 1069 | |
| 1070 | b_before = store_context(ce, scratch: before); |
| 1071 | if (IS_ERR(ptr: b_before)) |
| 1072 | return ERR_CAST(ptr: b_before); |
| 1073 | |
| 1074 | b_after = store_context(ce, scratch: after); |
| 1075 | if (IS_ERR(ptr: b_after)) { |
| 1076 | rq = ERR_CAST(ptr: b_after); |
| 1077 | goto err_before; |
| 1078 | } |
| 1079 | |
| 1080 | rq = intel_context_create_request(ce); |
| 1081 | if (IS_ERR(ptr: rq)) |
| 1082 | goto err_after; |
| 1083 | |
| 1084 | err = igt_vma_move_to_active_unlocked(vma: before, rq, EXEC_OBJECT_WRITE); |
| 1085 | if (err) |
| 1086 | goto err_rq; |
| 1087 | |
| 1088 | err = igt_vma_move_to_active_unlocked(vma: b_before, rq, flags: 0); |
| 1089 | if (err) |
| 1090 | goto err_rq; |
| 1091 | |
| 1092 | err = igt_vma_move_to_active_unlocked(vma: after, rq, EXEC_OBJECT_WRITE); |
| 1093 | if (err) |
| 1094 | goto err_rq; |
| 1095 | |
| 1096 | err = igt_vma_move_to_active_unlocked(vma: b_after, rq, flags: 0); |
| 1097 | if (err) |
| 1098 | goto err_rq; |
| 1099 | |
| 1100 | cs = intel_ring_begin(rq, num_dwords: 14); |
| 1101 | if (IS_ERR(ptr: cs)) { |
| 1102 | err = PTR_ERR(ptr: cs); |
| 1103 | goto err_rq; |
| 1104 | } |
| 1105 | |
| 1106 | *cs++ = MI_ARB_ON_OFF | MI_ARB_DISABLE; |
| 1107 | *cs++ = MI_BATCH_BUFFER_START_GEN8 | BIT(8); |
| 1108 | *cs++ = lower_32_bits(i915_vma_offset(b_before)); |
| 1109 | *cs++ = upper_32_bits(i915_vma_offset(b_before)); |
| 1110 | |
| 1111 | *cs++ = MI_ARB_ON_OFF | MI_ARB_ENABLE; |
| 1112 | *cs++ = MI_SEMAPHORE_WAIT | |
| 1113 | MI_SEMAPHORE_GLOBAL_GTT | |
| 1114 | MI_SEMAPHORE_POLL | |
| 1115 | MI_SEMAPHORE_SAD_NEQ_SDD; |
| 1116 | *cs++ = 0; |
| 1117 | *cs++ = i915_ggtt_offset(vma: ce->engine->status_page.vma) + |
| 1118 | offset_in_page(sema); |
| 1119 | *cs++ = 0; |
| 1120 | *cs++ = MI_NOOP; |
| 1121 | |
| 1122 | *cs++ = MI_ARB_ON_OFF | MI_ARB_DISABLE; |
| 1123 | *cs++ = MI_BATCH_BUFFER_START_GEN8 | BIT(8); |
| 1124 | *cs++ = lower_32_bits(i915_vma_offset(b_after)); |
| 1125 | *cs++ = upper_32_bits(i915_vma_offset(b_after)); |
| 1126 | |
| 1127 | intel_ring_advance(rq, cs); |
| 1128 | |
| 1129 | WRITE_ONCE(*sema, 0); |
| 1130 | i915_request_get(rq); |
| 1131 | i915_request_add(rq); |
| 1132 | err_after: |
| 1133 | i915_vma_put(vma: b_after); |
| 1134 | err_before: |
| 1135 | i915_vma_put(vma: b_before); |
| 1136 | return rq; |
| 1137 | |
| 1138 | err_rq: |
| 1139 | i915_request_add(rq); |
| 1140 | rq = ERR_PTR(error: err); |
| 1141 | goto err_after; |
| 1142 | } |
| 1143 | |
| 1144 | static struct i915_vma *load_context(struct intel_context *ce, u32 poison) |
| 1145 | { |
| 1146 | struct i915_vma *batch; |
| 1147 | u32 dw, *cs, *hw; |
| 1148 | u32 *defaults; |
| 1149 | |
| 1150 | batch = create_user_vma(vm: ce->vm, SZ_64K); |
| 1151 | if (IS_ERR(ptr: batch)) |
| 1152 | return batch; |
| 1153 | |
| 1154 | cs = i915_gem_object_pin_map_unlocked(obj: batch->obj, type: I915_MAP_WC); |
| 1155 | if (IS_ERR(ptr: cs)) { |
| 1156 | i915_vma_put(vma: batch); |
| 1157 | return ERR_CAST(ptr: cs); |
| 1158 | } |
| 1159 | |
| 1160 | defaults = shmem_pin_map(file: ce->engine->default_state); |
| 1161 | if (!defaults) { |
| 1162 | i915_gem_object_unpin_map(obj: batch->obj); |
| 1163 | i915_vma_put(vma: batch); |
| 1164 | return ERR_PTR(error: -ENOMEM); |
| 1165 | } |
| 1166 | |
| 1167 | dw = 0; |
| 1168 | hw = defaults; |
| 1169 | hw += LRC_STATE_OFFSET / sizeof(*hw); |
| 1170 | do { |
| 1171 | u32 len = hw[dw] & LRI_LENGTH_MASK; |
| 1172 | |
| 1173 | /* For simplicity, break parsing at the first complex command */ |
| 1174 | if ((hw[dw] >> INSTR_CLIENT_SHIFT) != INSTR_MI_CLIENT) |
| 1175 | break; |
| 1176 | |
| 1177 | if (hw[dw] == 0) { |
| 1178 | dw++; |
| 1179 | continue; |
| 1180 | } |
| 1181 | |
| 1182 | if ((hw[dw] & GENMASK(31, 23)) != LRI_HEADER) { |
| 1183 | dw += len + 2; |
| 1184 | continue; |
| 1185 | } |
| 1186 | |
| 1187 | if (!len) { |
| 1188 | pr_err("%s: invalid LRI found in context image\n" , |
| 1189 | ce->engine->name); |
| 1190 | igt_hexdump(buf: defaults, PAGE_SIZE); |
| 1191 | break; |
| 1192 | } |
| 1193 | |
| 1194 | dw++; |
| 1195 | len = (len + 1) / 2; |
| 1196 | *cs++ = MI_LOAD_REGISTER_IMM(len); |
| 1197 | while (len--) { |
| 1198 | *cs++ = hw[dw]; |
| 1199 | *cs++ = safe_poison(offset: hw[dw] & get_lri_mask(engine: ce->engine, |
| 1200 | MI_LRI_LRM_CS_MMIO), |
| 1201 | poison); |
| 1202 | dw += 2; |
| 1203 | } |
| 1204 | } while (dw < PAGE_SIZE / sizeof(u32) && |
| 1205 | (hw[dw] & ~BIT(0)) != MI_BATCH_BUFFER_END); |
| 1206 | |
| 1207 | *cs++ = MI_BATCH_BUFFER_END; |
| 1208 | |
| 1209 | shmem_unpin_map(file: ce->engine->default_state, ptr: defaults); |
| 1210 | |
| 1211 | i915_gem_object_flush_map(obj: batch->obj); |
| 1212 | i915_gem_object_unpin_map(obj: batch->obj); |
| 1213 | |
| 1214 | return batch; |
| 1215 | } |
| 1216 | |
| 1217 | static int poison_registers(struct intel_context *ce, u32 poison, u32 *sema) |
| 1218 | { |
| 1219 | struct i915_request *rq; |
| 1220 | struct i915_vma *batch; |
| 1221 | u32 *cs; |
| 1222 | int err; |
| 1223 | |
| 1224 | batch = load_context(ce, poison); |
| 1225 | if (IS_ERR(ptr: batch)) |
| 1226 | return PTR_ERR(ptr: batch); |
| 1227 | |
| 1228 | rq = intel_context_create_request(ce); |
| 1229 | if (IS_ERR(ptr: rq)) { |
| 1230 | err = PTR_ERR(ptr: rq); |
| 1231 | goto err_batch; |
| 1232 | } |
| 1233 | |
| 1234 | err = igt_vma_move_to_active_unlocked(vma: batch, rq, flags: 0); |
| 1235 | if (err) |
| 1236 | goto err_rq; |
| 1237 | |
| 1238 | cs = intel_ring_begin(rq, num_dwords: 8); |
| 1239 | if (IS_ERR(ptr: cs)) { |
| 1240 | err = PTR_ERR(ptr: cs); |
| 1241 | goto err_rq; |
| 1242 | } |
| 1243 | |
| 1244 | *cs++ = MI_ARB_ON_OFF | MI_ARB_DISABLE; |
| 1245 | *cs++ = MI_BATCH_BUFFER_START_GEN8 | BIT(8); |
| 1246 | *cs++ = lower_32_bits(i915_vma_offset(batch)); |
| 1247 | *cs++ = upper_32_bits(i915_vma_offset(batch)); |
| 1248 | |
| 1249 | *cs++ = MI_STORE_DWORD_IMM_GEN4 | MI_USE_GGTT; |
| 1250 | *cs++ = i915_ggtt_offset(vma: ce->engine->status_page.vma) + |
| 1251 | offset_in_page(sema); |
| 1252 | *cs++ = 0; |
| 1253 | *cs++ = 1; |
| 1254 | |
| 1255 | intel_ring_advance(rq, cs); |
| 1256 | |
| 1257 | rq->sched.attr.priority = I915_PRIORITY_BARRIER; |
| 1258 | err_rq: |
| 1259 | i915_request_add(rq); |
| 1260 | err_batch: |
| 1261 | i915_vma_put(vma: batch); |
| 1262 | return err; |
| 1263 | } |
| 1264 | |
| 1265 | static bool is_moving(u32 a, u32 b) |
| 1266 | { |
| 1267 | return a != b; |
| 1268 | } |
| 1269 | |
| 1270 | static int compare_isolation(struct intel_engine_cs *engine, |
| 1271 | struct i915_vma *ref[2], |
| 1272 | struct i915_vma *result[2], |
| 1273 | struct intel_context *ce, |
| 1274 | u32 poison) |
| 1275 | { |
| 1276 | u32 x, dw, *hw, *lrc; |
| 1277 | u32 *A[2], *B[2]; |
| 1278 | u32 *defaults; |
| 1279 | int err = 0; |
| 1280 | |
| 1281 | A[0] = i915_gem_object_pin_map_unlocked(obj: ref[0]->obj, type: I915_MAP_WC); |
| 1282 | if (IS_ERR(ptr: A[0])) |
| 1283 | return PTR_ERR(ptr: A[0]); |
| 1284 | |
| 1285 | A[1] = i915_gem_object_pin_map_unlocked(obj: ref[1]->obj, type: I915_MAP_WC); |
| 1286 | if (IS_ERR(ptr: A[1])) { |
| 1287 | err = PTR_ERR(ptr: A[1]); |
| 1288 | goto err_A0; |
| 1289 | } |
| 1290 | |
| 1291 | B[0] = i915_gem_object_pin_map_unlocked(obj: result[0]->obj, type: I915_MAP_WC); |
| 1292 | if (IS_ERR(ptr: B[0])) { |
| 1293 | err = PTR_ERR(ptr: B[0]); |
| 1294 | goto err_A1; |
| 1295 | } |
| 1296 | |
| 1297 | B[1] = i915_gem_object_pin_map_unlocked(obj: result[1]->obj, type: I915_MAP_WC); |
| 1298 | if (IS_ERR(ptr: B[1])) { |
| 1299 | err = PTR_ERR(ptr: B[1]); |
| 1300 | goto err_B0; |
| 1301 | } |
| 1302 | |
| 1303 | lrc = i915_gem_object_pin_map_unlocked(obj: ce->state->obj, |
| 1304 | type: intel_gt_coherent_map_type(gt: engine->gt, |
| 1305 | obj: ce->state->obj, |
| 1306 | always_coherent: false)); |
| 1307 | if (IS_ERR(ptr: lrc)) { |
| 1308 | err = PTR_ERR(ptr: lrc); |
| 1309 | goto err_B1; |
| 1310 | } |
| 1311 | lrc += LRC_STATE_OFFSET / sizeof(*hw); |
| 1312 | |
| 1313 | defaults = shmem_pin_map(file: ce->engine->default_state); |
| 1314 | if (!defaults) { |
| 1315 | err = -ENOMEM; |
| 1316 | goto err_lrc; |
| 1317 | } |
| 1318 | |
| 1319 | x = 0; |
| 1320 | dw = 0; |
| 1321 | hw = defaults; |
| 1322 | hw += LRC_STATE_OFFSET / sizeof(*hw); |
| 1323 | do { |
| 1324 | u32 len = hw[dw] & LRI_LENGTH_MASK; |
| 1325 | |
| 1326 | /* For simplicity, break parsing at the first complex command */ |
| 1327 | if ((hw[dw] >> INSTR_CLIENT_SHIFT) != INSTR_MI_CLIENT) |
| 1328 | break; |
| 1329 | |
| 1330 | if (hw[dw] == 0) { |
| 1331 | dw++; |
| 1332 | continue; |
| 1333 | } |
| 1334 | |
| 1335 | if ((hw[dw] & GENMASK(31, 23)) != LRI_HEADER) { |
| 1336 | dw += len + 2; |
| 1337 | continue; |
| 1338 | } |
| 1339 | |
| 1340 | if (!len) { |
| 1341 | pr_err("%s: invalid LRI found in context image\n" , |
| 1342 | engine->name); |
| 1343 | igt_hexdump(buf: defaults, PAGE_SIZE); |
| 1344 | break; |
| 1345 | } |
| 1346 | |
| 1347 | dw++; |
| 1348 | len = (len + 1) / 2; |
| 1349 | while (len--) { |
| 1350 | if (!is_moving(a: A[0][x], b: A[1][x]) && |
| 1351 | (A[0][x] != B[0][x] || A[1][x] != B[1][x])) { |
| 1352 | switch (hw[dw] & 4095) { |
| 1353 | case 0x30: /* RING_HEAD */ |
| 1354 | case 0x34: /* RING_TAIL */ |
| 1355 | break; |
| 1356 | |
| 1357 | default: |
| 1358 | pr_err("%s[%d]: Mismatch for register %4x, default %08x, reference %08x, result (%08x, %08x), poison %08x, context %08x\n" , |
| 1359 | engine->name, dw, |
| 1360 | hw[dw], hw[dw + 1], |
| 1361 | A[0][x], B[0][x], B[1][x], |
| 1362 | poison, lrc[dw + 1]); |
| 1363 | err = -EINVAL; |
| 1364 | } |
| 1365 | } |
| 1366 | dw += 2; |
| 1367 | x++; |
| 1368 | } |
| 1369 | } while (dw < PAGE_SIZE / sizeof(u32) && |
| 1370 | (hw[dw] & ~BIT(0)) != MI_BATCH_BUFFER_END); |
| 1371 | |
| 1372 | shmem_unpin_map(file: ce->engine->default_state, ptr: defaults); |
| 1373 | err_lrc: |
| 1374 | i915_gem_object_unpin_map(obj: ce->state->obj); |
| 1375 | err_B1: |
| 1376 | i915_gem_object_unpin_map(obj: result[1]->obj); |
| 1377 | err_B0: |
| 1378 | i915_gem_object_unpin_map(obj: result[0]->obj); |
| 1379 | err_A1: |
| 1380 | i915_gem_object_unpin_map(obj: ref[1]->obj); |
| 1381 | err_A0: |
| 1382 | i915_gem_object_unpin_map(obj: ref[0]->obj); |
| 1383 | return err; |
| 1384 | } |
| 1385 | |
| 1386 | static struct i915_vma * |
| 1387 | create_result_vma(struct i915_address_space *vm, unsigned long sz) |
| 1388 | { |
| 1389 | struct i915_vma *vma; |
| 1390 | void *ptr; |
| 1391 | |
| 1392 | vma = create_user_vma(vm, size: sz); |
| 1393 | if (IS_ERR(ptr: vma)) |
| 1394 | return vma; |
| 1395 | |
| 1396 | /* Set the results to a known value distinct from the poison */ |
| 1397 | ptr = i915_gem_object_pin_map_unlocked(obj: vma->obj, type: I915_MAP_WC); |
| 1398 | if (IS_ERR(ptr)) { |
| 1399 | i915_vma_put(vma); |
| 1400 | return ERR_CAST(ptr); |
| 1401 | } |
| 1402 | |
| 1403 | memset(ptr, POISON_INUSE, vma->size); |
| 1404 | i915_gem_object_flush_map(obj: vma->obj); |
| 1405 | i915_gem_object_unpin_map(obj: vma->obj); |
| 1406 | |
| 1407 | return vma; |
| 1408 | } |
| 1409 | |
| 1410 | static int __lrc_isolation(struct intel_engine_cs *engine, u32 poison) |
| 1411 | { |
| 1412 | u32 *sema = memset32(s: engine->status_page.addr + 1000, v: 0, n: 1); |
| 1413 | struct i915_vma *ref[2], *result[2]; |
| 1414 | struct intel_context *A, *B; |
| 1415 | struct i915_request *rq; |
| 1416 | int err; |
| 1417 | |
| 1418 | A = intel_context_create(engine); |
| 1419 | if (IS_ERR(ptr: A)) |
| 1420 | return PTR_ERR(ptr: A); |
| 1421 | |
| 1422 | B = intel_context_create(engine); |
| 1423 | if (IS_ERR(ptr: B)) { |
| 1424 | err = PTR_ERR(ptr: B); |
| 1425 | goto err_A; |
| 1426 | } |
| 1427 | |
| 1428 | ref[0] = create_result_vma(vm: A->vm, SZ_64K); |
| 1429 | if (IS_ERR(ptr: ref[0])) { |
| 1430 | err = PTR_ERR(ptr: ref[0]); |
| 1431 | goto err_B; |
| 1432 | } |
| 1433 | |
| 1434 | ref[1] = create_result_vma(vm: A->vm, SZ_64K); |
| 1435 | if (IS_ERR(ptr: ref[1])) { |
| 1436 | err = PTR_ERR(ptr: ref[1]); |
| 1437 | goto err_ref0; |
| 1438 | } |
| 1439 | |
| 1440 | rq = record_registers(ce: A, before: ref[0], after: ref[1], sema); |
| 1441 | if (IS_ERR(ptr: rq)) { |
| 1442 | err = PTR_ERR(ptr: rq); |
| 1443 | goto err_ref1; |
| 1444 | } |
| 1445 | |
| 1446 | WRITE_ONCE(*sema, 1); |
| 1447 | wmb(); |
| 1448 | |
| 1449 | if (i915_request_wait(rq, flags: 0, HZ / 2) < 0) { |
| 1450 | i915_request_put(rq); |
| 1451 | err = -ETIME; |
| 1452 | goto err_ref1; |
| 1453 | } |
| 1454 | i915_request_put(rq); |
| 1455 | |
| 1456 | result[0] = create_result_vma(vm: A->vm, SZ_64K); |
| 1457 | if (IS_ERR(ptr: result[0])) { |
| 1458 | err = PTR_ERR(ptr: result[0]); |
| 1459 | goto err_ref1; |
| 1460 | } |
| 1461 | |
| 1462 | result[1] = create_result_vma(vm: A->vm, SZ_64K); |
| 1463 | if (IS_ERR(ptr: result[1])) { |
| 1464 | err = PTR_ERR(ptr: result[1]); |
| 1465 | goto err_result0; |
| 1466 | } |
| 1467 | |
| 1468 | rq = record_registers(ce: A, before: result[0], after: result[1], sema); |
| 1469 | if (IS_ERR(ptr: rq)) { |
| 1470 | err = PTR_ERR(ptr: rq); |
| 1471 | goto err_result1; |
| 1472 | } |
| 1473 | |
| 1474 | err = poison_registers(ce: B, poison, sema); |
| 1475 | if (err == 0 && i915_request_wait(rq, flags: 0, HZ / 2) < 0) { |
| 1476 | pr_err("%s(%s): wait for results timed out\n" , |
| 1477 | __func__, engine->name); |
| 1478 | err = -ETIME; |
| 1479 | } |
| 1480 | |
| 1481 | /* Always cancel the semaphore wait, just in case the GPU gets stuck */ |
| 1482 | WRITE_ONCE(*sema, -1); |
| 1483 | i915_request_put(rq); |
| 1484 | if (err) |
| 1485 | goto err_result1; |
| 1486 | |
| 1487 | err = compare_isolation(engine, ref, result, ce: A, poison); |
| 1488 | |
| 1489 | err_result1: |
| 1490 | i915_vma_put(vma: result[1]); |
| 1491 | err_result0: |
| 1492 | i915_vma_put(vma: result[0]); |
| 1493 | err_ref1: |
| 1494 | i915_vma_put(vma: ref[1]); |
| 1495 | err_ref0: |
| 1496 | i915_vma_put(vma: ref[0]); |
| 1497 | err_B: |
| 1498 | intel_context_put(ce: B); |
| 1499 | err_A: |
| 1500 | intel_context_put(ce: A); |
| 1501 | return err; |
| 1502 | } |
| 1503 | |
| 1504 | static bool skip_isolation(const struct intel_engine_cs *engine) |
| 1505 | { |
| 1506 | if (engine->class == COPY_ENGINE_CLASS && GRAPHICS_VER(engine->i915) == 9) |
| 1507 | return true; |
| 1508 | |
| 1509 | if (engine->class == RENDER_CLASS && GRAPHICS_VER(engine->i915) == 11) |
| 1510 | return true; |
| 1511 | |
| 1512 | return false; |
| 1513 | } |
| 1514 | |
| 1515 | static int live_lrc_isolation(void *arg) |
| 1516 | { |
| 1517 | struct intel_gt *gt = arg; |
| 1518 | struct intel_engine_cs *engine; |
| 1519 | enum intel_engine_id id; |
| 1520 | const u32 poison[] = { |
| 1521 | STACK_MAGIC, |
| 1522 | 0x3a3a3a3a, |
| 1523 | 0x5c5c5c5c, |
| 1524 | 0xffffffff, |
| 1525 | 0xffff0000, |
| 1526 | }; |
| 1527 | int err = 0; |
| 1528 | |
| 1529 | /* |
| 1530 | * Our goal is try and verify that per-context state cannot be |
| 1531 | * tampered with by another non-privileged client. |
| 1532 | * |
| 1533 | * We take the list of context registers from the LRI in the default |
| 1534 | * context image and attempt to modify that list from a remote context. |
| 1535 | */ |
| 1536 | |
| 1537 | for_each_engine(engine, gt, id) { |
| 1538 | int i; |
| 1539 | |
| 1540 | /* Just don't even ask */ |
| 1541 | if (!IS_ENABLED(CONFIG_DRM_I915_SELFTEST_BROKEN) && |
| 1542 | skip_isolation(engine)) |
| 1543 | continue; |
| 1544 | |
| 1545 | intel_engine_pm_get(engine); |
| 1546 | for (i = 0; i < ARRAY_SIZE(poison); i++) { |
| 1547 | int result; |
| 1548 | |
| 1549 | result = __lrc_isolation(engine, poison: poison[i]); |
| 1550 | if (result && !err) |
| 1551 | err = result; |
| 1552 | |
| 1553 | result = __lrc_isolation(engine, poison: ~poison[i]); |
| 1554 | if (result && !err) |
| 1555 | err = result; |
| 1556 | } |
| 1557 | intel_engine_pm_put(engine); |
| 1558 | if (igt_flush_test(i915: gt->i915)) { |
| 1559 | err = -EIO; |
| 1560 | break; |
| 1561 | } |
| 1562 | } |
| 1563 | |
| 1564 | return err; |
| 1565 | } |
| 1566 | |
| 1567 | static int wabb_ctx_submit_req(struct intel_context *ce) |
| 1568 | { |
| 1569 | struct i915_request *rq; |
| 1570 | int err = 0; |
| 1571 | |
| 1572 | rq = intel_context_create_request(ce); |
| 1573 | if (IS_ERR(ptr: rq)) |
| 1574 | return PTR_ERR(ptr: rq); |
| 1575 | |
| 1576 | i915_request_get(rq); |
| 1577 | i915_request_add(rq); |
| 1578 | |
| 1579 | if (i915_request_wait(rq, flags: 0, HZ / 5) < 0) |
| 1580 | err = -ETIME; |
| 1581 | |
| 1582 | i915_request_put(rq); |
| 1583 | |
| 1584 | return err; |
| 1585 | } |
| 1586 | |
| 1587 | #define CTX_BB_CANARY_OFFSET (3 * 1024) |
| 1588 | #define CTX_BB_CANARY_INDEX (CTX_BB_CANARY_OFFSET / sizeof(u32)) |
| 1589 | |
| 1590 | static u32 * |
| 1591 | emit_wabb_ctx_canary(const struct intel_context *ce, |
| 1592 | u32 *cs, bool per_ctx) |
| 1593 | { |
| 1594 | *cs++ = MI_STORE_REGISTER_MEM_GEN8 | |
| 1595 | MI_SRM_LRM_GLOBAL_GTT | |
| 1596 | MI_LRI_LRM_CS_MMIO; |
| 1597 | *cs++ = i915_mmio_reg_offset(RING_START(0)); |
| 1598 | *cs++ = i915_ggtt_offset(vma: ce->state) + |
| 1599 | context_wa_bb_offset(ce) + |
| 1600 | CTX_BB_CANARY_OFFSET + |
| 1601 | (per_ctx ? PAGE_SIZE : 0); |
| 1602 | *cs++ = 0; |
| 1603 | |
| 1604 | return cs; |
| 1605 | } |
| 1606 | |
| 1607 | static u32 * |
| 1608 | emit_indirect_ctx_bb_canary(const struct intel_context *ce, u32 *cs) |
| 1609 | { |
| 1610 | return emit_wabb_ctx_canary(ce, cs, per_ctx: false); |
| 1611 | } |
| 1612 | |
| 1613 | static u32 * |
| 1614 | emit_per_ctx_bb_canary(const struct intel_context *ce, u32 *cs) |
| 1615 | { |
| 1616 | return emit_wabb_ctx_canary(ce, cs, per_ctx: true); |
| 1617 | } |
| 1618 | |
| 1619 | static void |
| 1620 | wabb_ctx_setup(struct intel_context *ce, bool per_ctx) |
| 1621 | { |
| 1622 | u32 *cs = context_wabb(ce, per_ctx); |
| 1623 | |
| 1624 | cs[CTX_BB_CANARY_INDEX] = 0xdeadf00d; |
| 1625 | |
| 1626 | if (per_ctx) |
| 1627 | setup_per_ctx_bb(ce, engine: ce->engine, emit: emit_per_ctx_bb_canary); |
| 1628 | else |
| 1629 | setup_indirect_ctx_bb(ce, engine: ce->engine, emit: emit_indirect_ctx_bb_canary); |
| 1630 | } |
| 1631 | |
| 1632 | static bool check_ring_start(struct intel_context *ce, bool per_ctx) |
| 1633 | { |
| 1634 | const u32 * const ctx_bb = (void *)(ce->lrc_reg_state) - |
| 1635 | LRC_STATE_OFFSET + context_wa_bb_offset(ce) + |
| 1636 | (per_ctx ? PAGE_SIZE : 0); |
| 1637 | |
| 1638 | if (ctx_bb[CTX_BB_CANARY_INDEX] == ce->lrc_reg_state[CTX_RING_START]) |
| 1639 | return true; |
| 1640 | |
| 1641 | pr_err("ring start mismatch: canary 0x%08x vs state 0x%08x\n" , |
| 1642 | ctx_bb[CTX_BB_CANARY_INDEX], |
| 1643 | ce->lrc_reg_state[CTX_RING_START]); |
| 1644 | |
| 1645 | return false; |
| 1646 | } |
| 1647 | |
| 1648 | static int wabb_ctx_check(struct intel_context *ce, bool per_ctx) |
| 1649 | { |
| 1650 | int err; |
| 1651 | |
| 1652 | err = wabb_ctx_submit_req(ce); |
| 1653 | if (err) |
| 1654 | return err; |
| 1655 | |
| 1656 | if (!check_ring_start(ce, per_ctx)) |
| 1657 | return -EINVAL; |
| 1658 | |
| 1659 | return 0; |
| 1660 | } |
| 1661 | |
| 1662 | static int __lrc_wabb_ctx(struct intel_engine_cs *engine, bool per_ctx) |
| 1663 | { |
| 1664 | struct intel_context *a, *b; |
| 1665 | int err; |
| 1666 | |
| 1667 | a = intel_context_create(engine); |
| 1668 | if (IS_ERR(ptr: a)) |
| 1669 | return PTR_ERR(ptr: a); |
| 1670 | err = intel_context_pin(ce: a); |
| 1671 | if (err) |
| 1672 | goto put_a; |
| 1673 | |
| 1674 | b = intel_context_create(engine); |
| 1675 | if (IS_ERR(ptr: b)) { |
| 1676 | err = PTR_ERR(ptr: b); |
| 1677 | goto unpin_a; |
| 1678 | } |
| 1679 | err = intel_context_pin(ce: b); |
| 1680 | if (err) |
| 1681 | goto put_b; |
| 1682 | |
| 1683 | /* We use the already reserved extra page in context state */ |
| 1684 | if (!a->wa_bb_page) { |
| 1685 | GEM_BUG_ON(b->wa_bb_page); |
| 1686 | GEM_BUG_ON(GRAPHICS_VER(engine->i915) == 12); |
| 1687 | goto unpin_b; |
| 1688 | } |
| 1689 | |
| 1690 | /* |
| 1691 | * In order to test that our per context bb is truly per context, |
| 1692 | * and executes at the intended spot on context restoring process, |
| 1693 | * make the batch store the ring start value to memory. |
| 1694 | * As ring start is restored apriori of starting the indirect ctx bb and |
| 1695 | * as it will be different for each context, it fits to this purpose. |
| 1696 | */ |
| 1697 | wabb_ctx_setup(ce: a, per_ctx); |
| 1698 | wabb_ctx_setup(ce: b, per_ctx); |
| 1699 | |
| 1700 | err = wabb_ctx_check(ce: a, per_ctx); |
| 1701 | if (err) |
| 1702 | goto unpin_b; |
| 1703 | |
| 1704 | err = wabb_ctx_check(ce: b, per_ctx); |
| 1705 | |
| 1706 | unpin_b: |
| 1707 | intel_context_unpin(ce: b); |
| 1708 | put_b: |
| 1709 | intel_context_put(ce: b); |
| 1710 | unpin_a: |
| 1711 | intel_context_unpin(ce: a); |
| 1712 | put_a: |
| 1713 | intel_context_put(ce: a); |
| 1714 | |
| 1715 | return err; |
| 1716 | } |
| 1717 | |
| 1718 | static int lrc_wabb_ctx(void *arg, bool per_ctx) |
| 1719 | { |
| 1720 | struct intel_gt *gt = arg; |
| 1721 | struct intel_engine_cs *engine; |
| 1722 | enum intel_engine_id id; |
| 1723 | int err = 0; |
| 1724 | |
| 1725 | for_each_engine(engine, gt, id) { |
| 1726 | intel_engine_pm_get(engine); |
| 1727 | err = __lrc_wabb_ctx(engine, per_ctx); |
| 1728 | intel_engine_pm_put(engine); |
| 1729 | |
| 1730 | if (igt_flush_test(i915: gt->i915)) |
| 1731 | err = -EIO; |
| 1732 | |
| 1733 | if (err) |
| 1734 | break; |
| 1735 | } |
| 1736 | |
| 1737 | return err; |
| 1738 | } |
| 1739 | |
| 1740 | static int live_lrc_indirect_ctx_bb(void *arg) |
| 1741 | { |
| 1742 | return lrc_wabb_ctx(arg, per_ctx: false); |
| 1743 | } |
| 1744 | |
| 1745 | static int live_lrc_per_ctx_bb(void *arg) |
| 1746 | { |
| 1747 | return lrc_wabb_ctx(arg, per_ctx: true); |
| 1748 | } |
| 1749 | |
| 1750 | static void garbage_reset(struct intel_engine_cs *engine, |
| 1751 | struct i915_request *rq) |
| 1752 | { |
| 1753 | const unsigned int bit = I915_RESET_ENGINE + engine->id; |
| 1754 | unsigned long *lock = &engine->gt->reset.flags; |
| 1755 | |
| 1756 | local_bh_disable(); |
| 1757 | if (!test_and_set_bit(nr: bit, addr: lock)) { |
| 1758 | tasklet_disable(t: &engine->sched_engine->tasklet); |
| 1759 | |
| 1760 | if (!rq->fence.error) |
| 1761 | __intel_engine_reset_bh(engine, NULL); |
| 1762 | |
| 1763 | tasklet_enable(t: &engine->sched_engine->tasklet); |
| 1764 | clear_and_wake_up_bit(bit, word: lock); |
| 1765 | } |
| 1766 | local_bh_enable(); |
| 1767 | } |
| 1768 | |
| 1769 | static struct i915_request *garbage(struct intel_context *ce, |
| 1770 | struct rnd_state *prng) |
| 1771 | { |
| 1772 | struct i915_request *rq; |
| 1773 | int err; |
| 1774 | |
| 1775 | err = intel_context_pin(ce); |
| 1776 | if (err) |
| 1777 | return ERR_PTR(error: err); |
| 1778 | |
| 1779 | prandom_bytes_state(state: prng, |
| 1780 | buf: ce->lrc_reg_state, |
| 1781 | nbytes: ce->engine->context_size - |
| 1782 | LRC_STATE_OFFSET); |
| 1783 | |
| 1784 | rq = intel_context_create_request(ce); |
| 1785 | if (IS_ERR(ptr: rq)) { |
| 1786 | err = PTR_ERR(ptr: rq); |
| 1787 | goto err_unpin; |
| 1788 | } |
| 1789 | |
| 1790 | i915_request_get(rq); |
| 1791 | i915_request_add(rq); |
| 1792 | return rq; |
| 1793 | |
| 1794 | err_unpin: |
| 1795 | intel_context_unpin(ce); |
| 1796 | return ERR_PTR(error: err); |
| 1797 | } |
| 1798 | |
| 1799 | static int __lrc_garbage(struct intel_engine_cs *engine, struct rnd_state *prng) |
| 1800 | { |
| 1801 | struct intel_context *ce; |
| 1802 | struct i915_request *hang; |
| 1803 | int err = 0; |
| 1804 | |
| 1805 | ce = intel_context_create(engine); |
| 1806 | if (IS_ERR(ptr: ce)) |
| 1807 | return PTR_ERR(ptr: ce); |
| 1808 | |
| 1809 | hang = garbage(ce, prng); |
| 1810 | if (IS_ERR(ptr: hang)) { |
| 1811 | err = PTR_ERR(ptr: hang); |
| 1812 | goto err_ce; |
| 1813 | } |
| 1814 | |
| 1815 | if (wait_for_submit(engine, rq: hang, HZ / 2)) { |
| 1816 | i915_request_put(rq: hang); |
| 1817 | err = -ETIME; |
| 1818 | goto err_ce; |
| 1819 | } |
| 1820 | |
| 1821 | intel_context_set_banned(ce); |
| 1822 | garbage_reset(engine, rq: hang); |
| 1823 | |
| 1824 | intel_engine_flush_submission(engine); |
| 1825 | if (!hang->fence.error) { |
| 1826 | i915_request_put(rq: hang); |
| 1827 | pr_err("%s: corrupted context was not reset\n" , |
| 1828 | engine->name); |
| 1829 | err = -EINVAL; |
| 1830 | goto err_ce; |
| 1831 | } |
| 1832 | |
| 1833 | if (i915_request_wait(rq: hang, flags: 0, HZ / 2) < 0) { |
| 1834 | pr_err("%s: corrupted context did not recover\n" , |
| 1835 | engine->name); |
| 1836 | i915_request_put(rq: hang); |
| 1837 | err = -EIO; |
| 1838 | goto err_ce; |
| 1839 | } |
| 1840 | i915_request_put(rq: hang); |
| 1841 | |
| 1842 | err_ce: |
| 1843 | intel_context_put(ce); |
| 1844 | return err; |
| 1845 | } |
| 1846 | |
| 1847 | static int live_lrc_garbage(void *arg) |
| 1848 | { |
| 1849 | struct intel_gt *gt = arg; |
| 1850 | struct intel_engine_cs *engine; |
| 1851 | enum intel_engine_id id; |
| 1852 | |
| 1853 | /* |
| 1854 | * Verify that we can recover if one context state is completely |
| 1855 | * corrupted. |
| 1856 | */ |
| 1857 | |
| 1858 | if (!IS_ENABLED(CONFIG_DRM_I915_SELFTEST_BROKEN)) |
| 1859 | return 0; |
| 1860 | |
| 1861 | for_each_engine(engine, gt, id) { |
| 1862 | I915_RND_STATE(prng); |
| 1863 | int err = 0, i; |
| 1864 | |
| 1865 | if (!intel_has_reset_engine(gt: engine->gt)) |
| 1866 | continue; |
| 1867 | |
| 1868 | intel_engine_pm_get(engine); |
| 1869 | for (i = 0; i < 3; i++) { |
| 1870 | err = __lrc_garbage(engine, prng: &prng); |
| 1871 | if (err) |
| 1872 | break; |
| 1873 | } |
| 1874 | intel_engine_pm_put(engine); |
| 1875 | |
| 1876 | if (igt_flush_test(i915: gt->i915)) |
| 1877 | err = -EIO; |
| 1878 | if (err) |
| 1879 | return err; |
| 1880 | } |
| 1881 | |
| 1882 | return 0; |
| 1883 | } |
| 1884 | |
| 1885 | static int __live_pphwsp_runtime(struct intel_engine_cs *engine) |
| 1886 | { |
| 1887 | struct intel_context *ce; |
| 1888 | struct i915_request *rq; |
| 1889 | IGT_TIMEOUT(end_time); |
| 1890 | int err; |
| 1891 | |
| 1892 | ce = intel_context_create(engine); |
| 1893 | if (IS_ERR(ptr: ce)) |
| 1894 | return PTR_ERR(ptr: ce); |
| 1895 | |
| 1896 | ce->stats.runtime.num_underflow = 0; |
| 1897 | ce->stats.runtime.max_underflow = 0; |
| 1898 | |
| 1899 | do { |
| 1900 | unsigned int loop = 1024; |
| 1901 | |
| 1902 | while (loop) { |
| 1903 | rq = intel_context_create_request(ce); |
| 1904 | if (IS_ERR(ptr: rq)) { |
| 1905 | err = PTR_ERR(ptr: rq); |
| 1906 | goto err_rq; |
| 1907 | } |
| 1908 | |
| 1909 | if (--loop == 0) |
| 1910 | i915_request_get(rq); |
| 1911 | |
| 1912 | i915_request_add(rq); |
| 1913 | } |
| 1914 | |
| 1915 | if (__igt_timeout(timeout: end_time, NULL)) |
| 1916 | break; |
| 1917 | |
| 1918 | i915_request_put(rq); |
| 1919 | } while (1); |
| 1920 | |
| 1921 | err = i915_request_wait(rq, flags: 0, HZ / 5); |
| 1922 | if (err < 0) { |
| 1923 | pr_err("%s: request not completed!\n" , engine->name); |
| 1924 | goto err_wait; |
| 1925 | } |
| 1926 | |
| 1927 | igt_flush_test(i915: engine->i915); |
| 1928 | |
| 1929 | pr_info("%s: pphwsp runtime %lluns, average %lluns\n" , |
| 1930 | engine->name, |
| 1931 | intel_context_get_total_runtime_ns(ce), |
| 1932 | intel_context_get_avg_runtime_ns(ce)); |
| 1933 | |
| 1934 | err = 0; |
| 1935 | if (ce->stats.runtime.num_underflow) { |
| 1936 | pr_err("%s: pphwsp underflow %u time(s), max %u cycles!\n" , |
| 1937 | engine->name, |
| 1938 | ce->stats.runtime.num_underflow, |
| 1939 | ce->stats.runtime.max_underflow); |
| 1940 | GEM_TRACE_DUMP(); |
| 1941 | err = -EOVERFLOW; |
| 1942 | } |
| 1943 | |
| 1944 | err_wait: |
| 1945 | i915_request_put(rq); |
| 1946 | err_rq: |
| 1947 | intel_context_put(ce); |
| 1948 | return err; |
| 1949 | } |
| 1950 | |
| 1951 | static int live_pphwsp_runtime(void *arg) |
| 1952 | { |
| 1953 | struct intel_gt *gt = arg; |
| 1954 | struct intel_engine_cs *engine; |
| 1955 | enum intel_engine_id id; |
| 1956 | int err = 0; |
| 1957 | |
| 1958 | /* |
| 1959 | * Check that cumulative context runtime as stored in the pphwsp[16] |
| 1960 | * is monotonic. |
| 1961 | */ |
| 1962 | |
| 1963 | for_each_engine(engine, gt, id) { |
| 1964 | err = __live_pphwsp_runtime(engine); |
| 1965 | if (err) |
| 1966 | break; |
| 1967 | } |
| 1968 | |
| 1969 | if (igt_flush_test(i915: gt->i915)) |
| 1970 | err = -EIO; |
| 1971 | |
| 1972 | return err; |
| 1973 | } |
| 1974 | |
| 1975 | int intel_lrc_live_selftests(struct drm_i915_private *i915) |
| 1976 | { |
| 1977 | static const struct i915_subtest tests[] = { |
| 1978 | SUBTEST(live_lrc_layout), |
| 1979 | SUBTEST(live_lrc_fixed), |
| 1980 | SUBTEST(live_lrc_state), |
| 1981 | SUBTEST(live_lrc_gpr), |
| 1982 | SUBTEST(live_lrc_isolation), |
| 1983 | SUBTEST(live_lrc_timestamp), |
| 1984 | SUBTEST(live_lrc_garbage), |
| 1985 | SUBTEST(live_pphwsp_runtime), |
| 1986 | SUBTEST(live_lrc_indirect_ctx_bb), |
| 1987 | SUBTEST(live_lrc_per_ctx_bb), |
| 1988 | }; |
| 1989 | |
| 1990 | if (!HAS_LOGICAL_RING_CONTEXTS(i915)) |
| 1991 | return 0; |
| 1992 | |
| 1993 | return intel_gt_live_subtests(tests, to_gt(i915)); |
| 1994 | } |
| 1995 | |