[PATCH 32/36] drm/i915: Fix workarounds selftest, part 1
Maarten Lankhorst
maarten.lankhorst at linux.intel.com
Fri Sep 18 10:34:01 UTC 2020
pin_map needs the ww lock, so ensure we pin both before submission.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
.../gpu/drm/i915/gt/selftest_workarounds.c | 65 ++++++++++++-------
1 file changed, 43 insertions(+), 22 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/selftest_workarounds.c b/drivers/gpu/drm/i915/gt/selftest_workarounds.c
index 810ab026a55e..f39e4377fd49 100644
--- a/drivers/gpu/drm/i915/gt/selftest_workarounds.c
+++ b/drivers/gpu/drm/i915/gt/selftest_workarounds.c
@@ -520,6 +520,7 @@ static int check_dirty_whitelist(struct intel_context *ce)
for (i = 0; i < engine->whitelist.count; i++) {
u32 reg = i915_mmio_reg_offset(engine->whitelist.list[i].reg);
+ struct i915_gem_ww_ctx ww;
u64 addr = scratch->node.start;
struct i915_request *rq;
u32 srm, lrm, rsvd;
@@ -535,6 +536,29 @@ static int check_dirty_whitelist(struct intel_context *ce)
ro_reg = ro_register(reg);
+ i915_gem_ww_ctx_init(&ww, false);
+retry:
+ cs = NULL;
+ err = i915_gem_object_lock(scratch->obj, &ww);
+ if (!err)
+ err = i915_gem_object_lock(batch->obj, &ww);
+ if (!err)
+ err = intel_context_pin_ww(ce, &ww);
+ if (err)
+ goto out;
+
+ cs = i915_gem_object_pin_map(batch->obj, I915_MAP_WC);
+ if (IS_ERR(cs)) {
+ err = PTR_ERR(cs);
+ goto out_ctx;
+ }
+
+ results = i915_gem_object_pin_map(scratch->obj, I915_MAP_WB);
+ if (IS_ERR(results)) {
+ err = PTR_ERR(results);
+ goto out_unmap_batch;
+ }
+
/* Clear non priv flags */
reg &= RING_FORCE_TO_NONPRIV_ADDRESS_MASK;
@@ -546,12 +570,6 @@ static int check_dirty_whitelist(struct intel_context *ce)
pr_debug("%s: Writing garbage to %x\n",
engine->name, reg);
- cs = i915_gem_object_pin_map(batch->obj, I915_MAP_WC);
- if (IS_ERR(cs)) {
- err = PTR_ERR(cs);
- goto out_batch;
- }
-
/* SRM original */
*cs++ = srm;
*cs++ = reg;
@@ -598,11 +616,12 @@ static int check_dirty_whitelist(struct intel_context *ce)
i915_gem_object_flush_map(batch->obj);
i915_gem_object_unpin_map(batch->obj);
intel_gt_chipset_flush(engine->gt);
+ cs = NULL;
- rq = intel_context_create_request(ce);
+ rq = i915_request_create(ce);
if (IS_ERR(rq)) {
err = PTR_ERR(rq);
- goto out_batch;
+ goto out_unmap_scratch;
}
if (engine->emit_init_breadcrumb) { /* Be nice if we hang */
@@ -611,20 +630,16 @@ static int check_dirty_whitelist(struct intel_context *ce)
goto err_request;
}
- i915_vma_lock(batch);
err = i915_request_await_object(rq, batch->obj, false);
if (err == 0)
err = i915_vma_move_to_active(batch, rq, 0);
- i915_vma_unlock(batch);
if (err)
goto err_request;
- i915_vma_lock(scratch);
err = i915_request_await_object(rq, scratch->obj, true);
if (err == 0)
err = i915_vma_move_to_active(scratch, rq,
EXEC_OBJECT_WRITE);
- i915_vma_unlock(scratch);
if (err)
goto err_request;
@@ -640,13 +655,7 @@ static int check_dirty_whitelist(struct intel_context *ce)
pr_err("%s: Futzing %x timedout; cancelling test\n",
engine->name, reg);
intel_gt_set_wedged(engine->gt);
- goto out_batch;
- }
-
- results = i915_gem_object_pin_map(scratch->obj, I915_MAP_WB);
- if (IS_ERR(results)) {
- err = PTR_ERR(results);
- goto out_batch;
+ goto out_unmap_scratch;
}
GEM_BUG_ON(values[ARRAY_SIZE(values) - 1] != 0xffffffff);
@@ -657,7 +666,7 @@ static int check_dirty_whitelist(struct intel_context *ce)
pr_err("%s: Unable to write to whitelisted register %x\n",
engine->name, reg);
err = -EINVAL;
- goto out_unpin;
+ goto out_unmap_scratch;
}
} else {
rsvd = 0;
@@ -723,15 +732,27 @@ static int check_dirty_whitelist(struct intel_context *ce)
err = -EINVAL;
}
-out_unpin:
+out_unmap_scratch:
i915_gem_object_unpin_map(scratch->obj);
+out_unmap_batch:
+ if (cs)
+ i915_gem_object_unpin_map(batch->obj);
+out_ctx:
+ intel_context_unpin(ce);
+out:
+ if (err == -EDEADLK) {
+ err = i915_gem_ww_ctx_backoff(&ww);
+ if (!err)
+ goto retry;
+ }
+ i915_gem_ww_ctx_fini(&ww);
if (err)
break;
}
if (igt_flush_test(engine->i915))
err = -EIO;
-out_batch:
+
i915_vma_unpin_and_release(&batch, 0);
out_scratch:
i915_vma_unpin_and_release(&scratch, 0);
--
2.28.0
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