--- /dev/null
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#include "../i915_selftest.h"
+
+struct hang {
+ struct drm_i915_private *i915;
+ struct drm_i915_gem_object *hws;
+ struct drm_i915_gem_object *obj;
+ u32 *seqno;
+ u32 *batch;
+};
+
+static int hang_init(struct hang *h, struct drm_i915_private *i915)
+{
+ void *vaddr;
+ int err;
+
+ memset(h, 0, sizeof(*h));
+ h->i915 = i915;
+
+ h->hws = i915_gem_object_create_internal(i915, PAGE_SIZE);
+ if (IS_ERR(h->hws))
+ return PTR_ERR(h->hws);
+
+ h->obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
+ if (IS_ERR(h->obj)) {
+ err = PTR_ERR(h->obj);
+ goto err_hws;
+ }
+
+ i915_gem_object_set_cache_level(h->hws, I915_CACHE_LLC);
+ vaddr = i915_gem_object_pin_map(h->hws, I915_MAP_WB);
+ if (IS_ERR(vaddr)) {
+ err = PTR_ERR(vaddr);
+ goto err_obj;
+ }
+ h->seqno = memset(vaddr, 0xff, PAGE_SIZE);
+
+ vaddr = i915_gem_object_pin_map(h->obj,
+ HAS_LLC(i915) ? I915_MAP_WB : I915_MAP_WC);
+ if (IS_ERR(vaddr)) {
+ err = PTR_ERR(vaddr);
+ goto err_unpin_hws;
+ }
+ h->batch = vaddr;
+
+ return 0;
+
+err_unpin_hws:
+ i915_gem_object_unpin_map(h->hws);
+err_obj:
+ i915_gem_object_put(h->obj);
+err_hws:
+ i915_gem_object_put(h->hws);
+ return err;
+}
+
+static u64 hws_address(const struct i915_vma *hws,
+ const struct drm_i915_gem_request *rq)
+{
+ return hws->node.start + offset_in_page(sizeof(u32)*rq->fence.context);
+}
+
+static int emit_recurse_batch(struct hang *h,
+ struct drm_i915_gem_request *rq)
+{
+ struct drm_i915_private *i915 = h->i915;
+ struct i915_address_space *vm = rq->ctx->ppgtt ? &rq->ctx->ppgtt->base : &i915->ggtt.base;
+ struct i915_vma *hws, *vma;
+ unsigned int flags;
+ u32 *batch;
+ int err;
+
+ vma = i915_vma_instance(h->obj, vm, NULL);
+ if (IS_ERR(vma))
+ return PTR_ERR(vma);
+
+ hws = i915_vma_instance(h->hws, vm, NULL);
+ if (IS_ERR(hws))
+ return PTR_ERR(hws);
+
+ err = i915_vma_pin(vma, 0, 0, PIN_USER);
+ if (err)
+ return err;
+
+ err = i915_vma_pin(hws, 0, 0, PIN_USER);
+ if (err)
+ goto unpin_vma;
+
+ err = rq->engine->emit_flush(rq, EMIT_INVALIDATE);
+ if (err)
+ goto unpin_hws;
+
+ err = i915_switch_context(rq);
+ if (err)
+ goto unpin_hws;
+
+ i915_vma_move_to_active(vma, rq, 0);
+ if (!i915_gem_object_has_active_reference(vma->obj)) {
+ i915_gem_object_get(vma->obj);
+ i915_gem_object_set_active_reference(vma->obj);
+ }
+
+ i915_vma_move_to_active(hws, rq, 0);
+ if (!i915_gem_object_has_active_reference(hws->obj)) {
+ i915_gem_object_get(hws->obj);
+ i915_gem_object_set_active_reference(hws->obj);
+ }
+
+ batch = h->batch;
+ if (INTEL_GEN(i915) >= 8) {
+ *batch++ = MI_STORE_DWORD_IMM_GEN4;
+ *batch++ = lower_32_bits(hws_address(hws, rq));
+ *batch++ = upper_32_bits(hws_address(hws, rq));
+ *batch++ = rq->fence.seqno;
+ *batch++ = MI_BATCH_BUFFER_START | 1 << 8 | 1;
+ *batch++ = lower_32_bits(vma->node.start);
+ *batch++ = upper_32_bits(vma->node.start);
+ } else if (INTEL_GEN(i915) >= 6) {
+ *batch++ = MI_STORE_DWORD_IMM_GEN4;
+ *batch++ = 0;
+ *batch++ = lower_32_bits(hws_address(hws, rq));
+ *batch++ = rq->fence.seqno;
+ *batch++ = MI_BATCH_BUFFER_START | 1 << 8;
+ *batch++ = lower_32_bits(vma->node.start);
+ } else if (INTEL_GEN(i915) >= 4) {
+ *batch++ = MI_STORE_DWORD_IMM_GEN4 | 1 << 22;
+ *batch++ = 0;
+ *batch++ = lower_32_bits(hws_address(hws, rq));
+ *batch++ = rq->fence.seqno;
+ *batch++ = MI_BATCH_BUFFER_START | 2 << 6;
+ *batch++ = lower_32_bits(vma->node.start);
+ } else {
+ *batch++ = MI_STORE_DWORD_IMM;
+ *batch++ = lower_32_bits(hws_address(hws, rq));
+ *batch++ = rq->fence.seqno;
+ *batch++ = MI_BATCH_BUFFER_START | 2 << 6 | 1;
+ *batch++ = lower_32_bits(vma->node.start);
+ }
+ *batch++ = MI_BATCH_BUFFER_END; /* not reached */
+
+ flags = 0;
+ if (INTEL_GEN(vm->i915) <= 5)
+ flags |= I915_DISPATCH_SECURE;
+
+ err = rq->engine->emit_bb_start(rq, vma->node.start, PAGE_SIZE, flags);
+
+unpin_hws:
+ i915_vma_unpin(hws);
+unpin_vma:
+ i915_vma_unpin(vma);
+ return err;
+}
+
+static struct drm_i915_gem_request *
+hang_create_request(struct hang *h,
+ struct intel_engine_cs *engine,
+ struct i915_gem_context *ctx)
+{
+ struct drm_i915_gem_request *rq;
+ int err;
+
+ if (i915_gem_object_is_active(h->obj)) {
+ struct drm_i915_gem_object *obj;
+ void *vaddr;
+
+ obj = i915_gem_object_create_internal(h->i915, PAGE_SIZE);
+ if (IS_ERR(obj))
+ return ERR_CAST(obj);
+
+ vaddr = i915_gem_object_pin_map(obj,
+ HAS_LLC(h->i915) ? I915_MAP_WB : I915_MAP_WC);
+ if (IS_ERR(vaddr)) {
+ i915_gem_object_put(obj);
+ return ERR_CAST(vaddr);
+ }
+
+ i915_gem_object_unpin_map(h->obj);
+ i915_gem_object_put(h->obj);
+
+ h->obj = obj;
+ h->batch = vaddr;
+ }
+
+ rq = i915_gem_request_alloc(engine, ctx);
+ if (IS_ERR(rq))
+ return rq;
+
+ err = emit_recurse_batch(h, rq);
+ if (err) {
+ __i915_add_request(rq, false);
+ return ERR_PTR(err);
+ }
+
+ return rq;
+}
+
+static u32 hws_seqno(const struct hang *h,
+ const struct drm_i915_gem_request *rq)
+{
+ return READ_ONCE(h->seqno[rq->fence.context % (PAGE_SIZE/sizeof(u32))]);
+}
+
+static void hang_fini(struct hang *h)
+{
+ *h->batch = MI_BATCH_BUFFER_END;
+ wmb();
+
+ i915_gem_object_unpin_map(h->obj);
+ i915_gem_object_put(h->obj);
+
+ i915_gem_object_unpin_map(h->hws);
+ i915_gem_object_put(h->hws);
+
+ i915_gem_wait_for_idle(h->i915, I915_WAIT_LOCKED);
+ i915_gem_retire_requests(h->i915);
+}
+
+static int igt_hang_sanitycheck(void *arg)
+{
+ struct drm_i915_private *i915 = arg;
+ struct drm_i915_gem_request *rq;
+ struct intel_engine_cs *engine;
+ enum intel_engine_id id;
+ struct hang h;
+ int err;
+
+ /* Basic check that we can execute our hanging batch */
+
+ if (!igt_can_mi_store_dword_imm(i915))
+ return 0;
+
+ mutex_lock(&i915->drm.struct_mutex);
+ err = hang_init(&h, i915);
+ if (err)
+ goto unlock;
+
+ for_each_engine(engine, i915, id) {
+ long timeout;
+
+ rq = hang_create_request(&h, engine, i915->kernel_context);
+ if (IS_ERR(rq)) {
+ err = PTR_ERR(rq);
+ pr_err("Failed to create request for %s, err=%d\n",
+ engine->name, err);
+ goto fini;
+ }
+
+ i915_gem_request_get(rq);
+
+ *h.batch = MI_BATCH_BUFFER_END;
+ __i915_add_request(rq, true);
+
+ timeout = i915_wait_request(rq,
+ I915_WAIT_LOCKED,
+ MAX_SCHEDULE_TIMEOUT);
+ i915_gem_request_put(rq);
+
+ if (timeout < 0) {
+ err = timeout;
+ pr_err("Wait for request failed on %s, err=%d\n",
+ engine->name, err);
+ goto fini;
+ }
+ }
+
+fini:
+ hang_fini(&h);
+unlock:
+ mutex_unlock(&i915->drm.struct_mutex);
+ return err;
+}
+
+static int igt_global_reset(void *arg)
+{
+ struct drm_i915_private *i915 = arg;
+ unsigned int reset_count;
+ int err = 0;
+
+ /* Check that we can issue a global GPU reset */
+
+ set_bit(I915_RESET_IN_PROGRESS, &i915->gpu_error.flags);
+
+ mutex_lock(&i915->drm.struct_mutex);
+ reset_count = i915_reset_count(&i915->gpu_error);
+
+ i915_reset(i915);
+
+ if (i915_reset_count(&i915->gpu_error) == reset_count) {
+ pr_err("No GPU reset recorded!\n");
+ err = -EINVAL;
+ }
+ mutex_unlock(&i915->drm.struct_mutex);
+
+ GEM_BUG_ON(test_bit(I915_RESET_IN_PROGRESS, &i915->gpu_error.flags));
+ if (i915_terminally_wedged(&i915->gpu_error))
+ err = -EIO;
+
+ return err;
+}
+
+static u32 fake_hangcheck(struct drm_i915_gem_request *rq)
+{
+ u32 reset_count;
+
+ rq->engine->hangcheck.stalled = true;
+ rq->engine->hangcheck.seqno = intel_engine_get_seqno(rq->engine);
+
+ reset_count = i915_reset_count(&rq->i915->gpu_error);
+
+ set_bit(I915_RESET_IN_PROGRESS, &rq->i915->gpu_error.flags);
+ wake_up_all(&rq->i915->gpu_error.wait_queue);
+
+ return reset_count;
+}
+
+static bool wait_for_hang(struct hang *h, struct drm_i915_gem_request *rq)
+{
+ return !(wait_for_us(i915_seqno_passed(hws_seqno(h, rq),
+ rq->fence.seqno),
+ 10) &&
+ wait_for(i915_seqno_passed(hws_seqno(h, rq),
+ rq->fence.seqno),
+ 1000));
+}
+
+static int igt_wait_reset(void *arg)
+{
+ struct drm_i915_private *i915 = arg;
+ struct drm_i915_gem_request *rq;
+ unsigned int reset_count;
+ struct hang h;
+ long timeout;
+ int err;
+
+ /* Check that we detect a stuck waiter and issue a reset */
+
+ set_bit(I915_RESET_IN_PROGRESS, &i915->gpu_error.flags);
+
+ mutex_lock(&i915->drm.struct_mutex);
+ err = hang_init(&h, i915);
+ if (err)
+ goto unlock;
+
+ rq = hang_create_request(&h, i915->engine[RCS], i915->kernel_context);
+ if (IS_ERR(rq)) {
+ err = PTR_ERR(rq);
+ goto fini;
+ }
+
+ i915_gem_request_get(rq);
+ __i915_add_request(rq, true);
+
+ if (!wait_for_hang(&h, rq)) {
+ pr_err("Failed to start request %x\n", rq->fence.seqno);
+ err = -EIO;
+ goto out_rq;
+ }
+
+ reset_count = fake_hangcheck(rq);
+
+ timeout = i915_wait_request(rq, I915_WAIT_LOCKED, 10);
+ if (timeout < 0) {
+ pr_err("i915_wait_request failed on a stuck request: err=%ld\n",
+ timeout);
+ err = timeout;
+ goto out_rq;
+ }
+ GEM_BUG_ON(test_bit(I915_RESET_IN_PROGRESS, &i915->gpu_error.flags));
+
+ if (i915_reset_count(&i915->gpu_error) == reset_count) {
+ pr_err("No GPU reset recorded!\n");
+ err = -EINVAL;
+ goto out_rq;
+ }
+
+out_rq:
+ i915_gem_request_put(rq);
+fini:
+ hang_fini(&h);
+unlock:
+ mutex_unlock(&i915->drm.struct_mutex);
+
+ if (i915_terminally_wedged(&i915->gpu_error))
+ return -EIO;
+
+ return err;
+}
+
+static int igt_reset_queue(void *arg)
+{
+ struct drm_i915_private *i915 = arg;
+ struct intel_engine_cs *engine;
+ enum intel_engine_id id;
+ struct hang h;
+ int err;
+
+ /* Check that we replay pending requests following a hang */
+
+ if (!igt_can_mi_store_dword_imm(i915))
+ return 0;
+
+ mutex_lock(&i915->drm.struct_mutex);
+ err = hang_init(&h, i915);
+ if (err)
+ goto unlock;
+
+ for_each_engine(engine, i915, id) {
+ struct drm_i915_gem_request *prev;
+ IGT_TIMEOUT(end_time);
+ unsigned int count;
+
+ prev = hang_create_request(&h, engine, i915->kernel_context);
+ if (IS_ERR(prev)) {
+ err = PTR_ERR(prev);
+ goto fini;
+ }
+
+ i915_gem_request_get(prev);
+ __i915_add_request(prev, true);
+
+ count = 0;
+ do {
+ struct drm_i915_gem_request *rq;
+ unsigned int reset_count;
+
+ rq = hang_create_request(&h,
+ engine,
+ i915->kernel_context);
+ if (IS_ERR(rq)) {
+ err = PTR_ERR(rq);
+ goto fini;
+ }
+
+ i915_gem_request_get(rq);
+ __i915_add_request(rq, true);
+
+ if (!wait_for_hang(&h, prev)) {
+ pr_err("Failed to start request %x\n",
+ prev->fence.seqno);
+ i915_gem_request_put(rq);
+ i915_gem_request_put(prev);
+ err = -EIO;
+ goto fini;
+ }
+
+ reset_count = fake_hangcheck(prev);
+
+ i915_reset(i915);
+
+ GEM_BUG_ON(test_bit(I915_RESET_IN_PROGRESS,
+ &i915->gpu_error.flags));
+ if (prev->fence.error != -EIO) {
+ pr_err("GPU reset not recorded on hanging request [fence.error=%d]!\n",
+ prev->fence.error);
+ i915_gem_request_put(rq);
+ i915_gem_request_put(prev);
+ err = -EINVAL;
+ goto fini;
+ }
+
+ if (rq->fence.error) {
+ pr_err("Fence error status not zero [%d] after unrelated reset\n",
+ rq->fence.error);
+ i915_gem_request_put(rq);
+ i915_gem_request_put(prev);
+ err = -EINVAL;
+ goto fini;
+ }
+
+ if (i915_reset_count(&i915->gpu_error) == reset_count) {
+ pr_err("No GPU reset recorded!\n");
+ i915_gem_request_put(rq);
+ i915_gem_request_put(prev);
+ err = -EINVAL;
+ goto fini;
+ }
+
+ i915_gem_request_put(prev);
+ prev = rq;
+ count++;
+ } while (time_before(jiffies, end_time));
+ pr_info("%s: Completed %d resets\n", engine->name, count);
+
+ *h.batch = MI_BATCH_BUFFER_END;
+ wmb();
+
+ i915_gem_request_put(prev);
+ }
+
+fini:
+ hang_fini(&h);
+unlock:
+ mutex_unlock(&i915->drm.struct_mutex);
+
+ if (i915_terminally_wedged(&i915->gpu_error))
+ return -EIO;
+
+ return err;
+}
+
+int intel_hangcheck_live_selftests(struct drm_i915_private *i915)
+{
+ static const struct i915_subtest tests[] = {
+ SUBTEST(igt_hang_sanitycheck),
+ SUBTEST(igt_global_reset),
+ SUBTEST(igt_wait_reset),
+ SUBTEST(igt_reset_queue),
+ };
+
+ if (!intel_has_gpu_reset(i915))
+ return 0;
+
+ return i915_subtests(tests, i915);
+}
OSDN Git Service
