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drm/i915/selftests: Always hold a reference on a waited upon request 

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 <chris@chris-wilson.co.uk>
Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191121071044.97798-4-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2019-11-21 07:10:43 +00:00
parent 93b0e8fe47
commit 1ff2f9e26c
1 changed files with 66 additions and 21 deletions
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87
drivers/gpu/drm/i915/gt/selftest_lrc.c
View File

@ -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;
@ -1698,7 +1707,6 @@ 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;
engine->execlists.preempt_hang.count = 0;
@ -1708,18 +1716,22 @@ static int live_suppress_wait_preempt(void *arg)
goto err_client_3;
for (i = 0; i < ARRAY_SIZE(client); i++) {
rq[i] = spinner_create_request(&client[i].spin,
client[i].ctx, engine,
MI_NOOP);
if (IS_ERR(rq[i])) {
err = PTR_ERR(rq[i]);
struct i915_request *this;
this = spinner_create_request(&client[i].spin,
client[i].ctx, engine,
MI_NOOP);
if (IS_ERR(this)) {
err = PTR_ERR(this);
goto err_wedged;
}
/* Disable NEWCLIENT promotion */
__i915_active_fence_set(&i915_request_timeline(rq[i])->last_request,
__i915_active_fence_set(&i915_request_timeline(this)->last_request,
&dummy->fence);
i915_request_add(rq[i]);
rq[i] = i915_request_get(this);
i915_request_add(this);
}
dummy_request_free(dummy);
@ -1740,8 +1752,11 @@ 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]);
rq[i] = NULL;
}
if (igt_flush_test(gt->i915))
goto err_wedged;
@ -1769,8 +1784,10 @@ err_client_0:
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 +1832,8 @@ 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 +1846,10 @@ 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 +1883,8 @@ 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 +1897,19 @@ 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 +1918,11 @@ 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)) {
@ -2586,7 +2617,7 @@ static int nop_virtual_engine(struct intel_gt *gt,
#define CHAIN BIT(0)
{
IGT_TIMEOUT(end_time);
struct i915_request *request[16];
struct i915_request *request[16] = {};
struct i915_gem_context *ctx[16];
struct intel_context *ve[16];
unsigned long n, prime, nc;
@ -2632,27 +2663,35 @@ static int nop_virtual_engine(struct intel_gt *gt,
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]);
if (request[nc])
i915_request_put(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]);
if (request[nc])
i915_request_put(request[nc]);
request[nc] = i915_request_get(rq);
i915_request_add(rq);
}
}
}
@ -2678,6 +2717,11 @@ 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]);
request[nc] = NULL;
}
if (__igt_timeout(end_time, NULL))
break;
}
@ -2695,6 +2739,7 @@ out:
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]);