Whenever we wait on a request, make sure we actually hold a reference to
it and that it cannot be retired/freed on another CPU!
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/gt/selftest_lrc.c | 65 ++++++++++++++++++++------
1 file changed, 52 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c
b/drivers/gpu/drm/i915/gt/selftest_lrc.c
index f3b0610d1f10..4b645de43ea6 100644
--- a/drivers/gpu/drm/i915/gt/selftest_lrc.c
+++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c
@@ -748,15 +748,19 @@ static int live_busywait_preempt(void *arg)
*cs++ = 0;
intel_ring_advance(lo, cs);
+
+ i915_request_get(lo);
i915_request_add(lo);
if (wait_for(READ_ONCE(*map), 10)) {
+ i915_request_put(lo);
err = -ETIMEDOUT;
goto err_vma;
}
/* Low priority request should be busywaiting now */
if (i915_request_wait(lo, 0, 1) != -ETIME) {
+ i915_request_put(lo);
pr_err("%s: Busywaiting request did not!\n",
engine->name);
err = -EIO;
@@ -766,6 +770,7 @@ static int live_busywait_preempt(void *arg)
hi = igt_request_alloc(ctx_hi, engine);
if (IS_ERR(hi)) {
err = PTR_ERR(hi);
+ i915_request_put(lo);
goto err_vma;
}
@@ -773,6 +778,7 @@ static int live_busywait_preempt(void *arg)
if (IS_ERR(cs)) {
err = PTR_ERR(cs);
i915_request_add(hi);
+ i915_request_put(lo);
goto err_vma;
}
@@ -793,11 +799,13 @@ static int live_busywait_preempt(void *arg)
intel_engine_dump(engine, &p, "%s\n", engine->name);
GEM_TRACE_DUMP();
+ i915_request_put(lo);
intel_gt_set_wedged(gt);
err = -EIO;
goto err_vma;
}
GEM_BUG_ON(READ_ONCE(*map));
+ i915_request_put(lo);
if (igt_live_test_end(&t)) {
err = -EIO;
@@ -1665,6 +1673,7 @@ static int live_suppress_wait_preempt(void *arg)
{
struct intel_gt *gt = arg;
struct preempt_client client[4];
+ struct i915_request *rq[ARRAY_SIZE(client)];
struct intel_engine_cs *engine;
enum intel_engine_id id;
int err = -ENOMEM;
@@ -1698,9 +1707,9 @@ static int live_suppress_wait_preempt(void *arg)
continue;
for (depth = 0; depth < ARRAY_SIZE(client); depth++) {
- struct i915_request *rq[ARRAY_SIZE(client)];
struct i915_request *dummy;
+ memset(rq, 0, sizeof(rq));
engine->execlists.preempt_hang.count = 0;
dummy = dummy_request(engine);
@@ -1719,6 +1728,8 @@ static int live_suppress_wait_preempt(void *arg)
/* Disable NEWCLIENT promotion */
__i915_active_fence_set(&i915_request_timeline(rq[i])->last_request,
&dummy->fence);
+
+ i915_request_get(rq[i]);
i915_request_add(rq[i]);
}
@@ -1740,8 +1751,10 @@ static int live_suppress_wait_preempt(void *arg)
goto err_wedged;
}
- for (i = 0; i < ARRAY_SIZE(client); i++)
+ for (i = 0; i < ARRAY_SIZE(client); i++) {
igt_spinner_end(&client[i].spin);
+ i915_request_put(rq[i]);
+ }
if (igt_flush_test(gt->i915))
goto err_wedged;
@@ -1769,8 +1782,10 @@ static int live_suppress_wait_preempt(void *arg)
return err;
err_wedged:
- for (i = 0; i < ARRAY_SIZE(client); i++)
+ for (i = 0; i < ARRAY_SIZE(client); i++) {
igt_spinner_end(&client[i].spin);
+ i915_request_put(rq[i]);
+ }
intel_gt_set_wedged(gt);
err = -EIO;
goto err_client_3;
@@ -1815,6 +1830,8 @@ static int live_chain_preempt(void *arg)
MI_ARB_CHECK);
if (IS_ERR(rq))
goto err_wedged;
+
+ i915_request_get(rq);
i915_request_add(rq);
ring_size = rq->wa_tail - rq->head;
@@ -1827,8 +1844,10 @@ static int live_chain_preempt(void *arg)
igt_spinner_end(&lo.spin);
if (i915_request_wait(rq, 0, HZ / 2) < 0) {
pr_err("Timed out waiting to flush %s\n", engine->name);
+ i915_request_put(rq);
goto err_wedged;
}
+ i915_request_put(rq);
if (igt_live_test_begin(&t, gt->i915, __func__, engine->name)) {
err = -EIO;
@@ -1862,6 +1881,8 @@ static int live_chain_preempt(void *arg)
rq = igt_request_alloc(hi.ctx, engine);
if (IS_ERR(rq))
goto err_wedged;
+
+ i915_request_get(rq);
i915_request_add(rq);
engine->schedule(rq, &attr);
@@ -1874,14 +1895,19 @@ static int live_chain_preempt(void *arg)
count);
intel_engine_dump(engine, &p,
"%s\n", engine->name);
+ i915_request_put(rq);
goto err_wedged;
}
igt_spinner_end(&lo.spin);
+ i915_request_put(rq);
rq = igt_request_alloc(lo.ctx, engine);
if (IS_ERR(rq))
goto err_wedged;
+
+ i915_request_get(rq);
i915_request_add(rq);
+
if (i915_request_wait(rq, 0, HZ / 5) < 0) {
struct drm_printer p =
drm_info_printer(gt->i915->drm.dev);
@@ -1890,8 +1916,11 @@ static int live_chain_preempt(void *arg)
count);
intel_engine_dump(engine, &p,
"%s\n", engine->name);
+
+ i915_request_put(rq);
goto err_wedged;
}
+ i915_request_put(rq);
}
if (igt_live_test_end(&t)) {
@@ -2627,32 +2656,37 @@ static int nop_virtual_engine(struct intel_gt *gt,
goto out;
for_each_prime_number_from(prime, 1, 8192) {
+ memset(request, 0, sizeof(request));
times[1] = ktime_get_raw();
if (flags & CHAIN) {
for (nc = 0; nc < nctx; nc++) {
for (n = 0; n < prime; n++) {
- request[nc] =
- i915_request_create(ve[nc]);
- if (IS_ERR(request[nc])) {
- err = PTR_ERR(request[nc]);
+ struct i915_request *rq;
+
+ rq = i915_request_create(ve[nc]);
+ if (IS_ERR(rq)) {
+ err = PTR_ERR(rq);
goto out;
}
- i915_request_add(request[nc]);
+ request[nc] = i915_request_get(rq);
+ i915_request_add(rq);
}
}
} else {
for (n = 0; n < prime; n++) {
for (nc = 0; nc < nctx; nc++) {
- request[nc] =
- i915_request_create(ve[nc]);
- if (IS_ERR(request[nc])) {
- err = PTR_ERR(request[nc]);
+ struct i915_request *rq;
+
+ rq = i915_request_create(ve[nc]);
+ if (IS_ERR(rq)) {
+ err = PTR_ERR(rq);
goto out;
}
- i915_request_add(request[nc]);
+ request[nc] = i915_request_get(rq);
+ i915_request_add(rq);
}
}
}
@@ -2678,6 +2712,10 @@ static int nop_virtual_engine(struct intel_gt *gt,
if (prime == 1)
times[0] = times[1];
+ for (nc = 0; nc < nctx; nc++)
+ i915_request_put(request[nc]);
+ memset(request, 0, sizeof(request));
+
if (__igt_timeout(end_time, NULL))
break;
}
@@ -2695,6 +2733,7 @@ static int nop_virtual_engine(struct intel_gt *gt,
err = -EIO;
for (nc = 0; nc < nctx; nc++) {
+ i915_request_put(request[nc]);
intel_context_unpin(ve[nc]);
intel_context_put(ve[nc]);
kernel_context_close(ctx[nc]);
--
2.24.0
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