[Intel-gfx] [PATCH] drm/i915/selftests: Use request managed wakerefs

[Tvrtko Ursulin]

On 20/06/2019 11:24, Chris Wilson wrote:
> Since commit 79ffac8599c4 ("drm/i915: Invert the GEM wakeref
> hierarchy"), the request creation itself took responsibility for
> managing the engine/GT wakerefs and so we can remove the redundant grabs
> in our selftests.
> 
> References: 79ffac8599c4 ("drm/i915: Invert the GEM wakeref hierarchy")
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> ---
>   .../drm/i915/gem/selftests/i915_gem_context.c | 35 ++++---------------
>   1 file changed, 7 insertions(+), 28 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
> index eaa2b16574c7..f2d4e773404a 100644
> --- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
> +++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_context.c
> @@ -31,7 +31,6 @@ static int live_nop_switch(void *arg)
>   	struct intel_engine_cs *engine;
>   	struct i915_gem_context **ctx;
>   	enum intel_engine_id id;
> -	intel_wakeref_t wakeref;
>   	struct igt_live_test t;
>   	struct drm_file *file;
>   	unsigned long n;
> @@ -53,7 +52,6 @@ static int live_nop_switch(void *arg)
>   		return PTR_ERR(file);
>   
>   	mutex_lock(&i915->drm.struct_mutex);
> -	wakeref = intel_runtime_pm_get(&i915->runtime_pm);
>   
>   	ctx = kcalloc(nctx, sizeof(*ctx), GFP_KERNEL);
>   	if (!ctx) {
> @@ -152,7 +150,6 @@ static int live_nop_switch(void *arg)
>   	}
>   
>   out_unlock:
> -	intel_runtime_pm_put(&i915->runtime_pm, wakeref);
>   	mutex_unlock(&i915->drm.struct_mutex);
>   	mock_file_free(i915, file);
>   	return err;
> @@ -507,7 +504,6 @@ static int igt_ctx_exec(void *arg)
>   		dw = 0;
>   		while (!time_after(jiffies, end_time)) {
>   			struct i915_gem_context *ctx;
> -			intel_wakeref_t wakeref;
>   
>   			ctx = live_context(i915, file);
>   			if (IS_ERR(ctx)) {
> @@ -523,8 +519,7 @@ static int igt_ctx_exec(void *arg)
>   				}
>   			}
>   
> -			with_intel_runtime_pm(&i915->runtime_pm, wakeref)
> -				err = gpu_fill(obj, ctx, engine, dw);
> +			err = gpu_fill(obj, ctx, engine, dw);
>   			if (err) {
>   				pr_err("Failed to fill dword %lu [%lu/%lu] with gpu (%s) in ctx %u [full-ppgtt? %s], err=%d\n",
>   				       ndwords, dw, max_dwords(obj),
> @@ -623,7 +618,6 @@ static int igt_shared_ctx_exec(void *arg)
>   		ncontexts = 0;
>   		while (!time_after(jiffies, end_time)) {
>   			struct i915_gem_context *ctx;
> -			intel_wakeref_t wakeref;
>   
>   			ctx = kernel_context(i915);
>   			if (IS_ERR(ctx)) {
> @@ -642,9 +636,7 @@ static int igt_shared_ctx_exec(void *arg)
>   				}
>   			}
>   
> -			err = 0;
> -			with_intel_runtime_pm(&i915->runtime_pm, wakeref)
> -				err = gpu_fill(obj, ctx, engine, dw);
> +			err = gpu_fill(obj, ctx, engine, dw);
>   			if (err) {
>   				pr_err("Failed to fill dword %lu [%lu/%lu] with gpu (%s) in ctx %u [full-ppgtt? %s], err=%d\n",
>   				       ndwords, dw, max_dwords(obj),
> @@ -1030,7 +1022,6 @@ __igt_ctx_sseu(struct drm_i915_private *i915,
>   	struct i915_gem_context *ctx;
>   	struct intel_context *ce;
>   	struct intel_sseu pg_sseu;
> -	intel_wakeref_t wakeref;
>   	struct drm_file *file;
>   	int ret;
>   
> @@ -1078,12 +1069,10 @@ __igt_ctx_sseu(struct drm_i915_private *i915,
>   		goto out_unlock;
>   	}
>   
> -	wakeref = intel_runtime_pm_get(&i915->runtime_pm);
> -
>   	ce = i915_gem_context_get_engine(ctx, RCS0);
>   	if (IS_ERR(ce)) {
>   		ret = PTR_ERR(ce);
> -		goto out_rpm;
> +		goto out_put;
>   	}
>   
>   	ret = intel_context_pin(ce);
> @@ -1117,8 +1106,7 @@ __igt_ctx_sseu(struct drm_i915_private *i915,
>   	intel_context_unpin(ce);
>   out_context:
>   	intel_context_put(ce);
> -out_rpm:
> -	intel_runtime_pm_put(&i915->runtime_pm, wakeref);
> +out_put:
>   	i915_gem_object_put(obj);
>   
>   out_unlock:
> @@ -1207,8 +1195,6 @@ static int igt_ctx_readonly(void *arg)
>   		unsigned int id;
>   
>   		for_each_engine(engine, i915, id) {
> -			intel_wakeref_t wakeref;
> -
>   			if (!intel_engine_can_store_dword(engine))
>   				continue;
>   
> @@ -1223,9 +1209,7 @@ static int igt_ctx_readonly(void *arg)
>   					i915_gem_object_set_readonly(obj);
>   			}
>   
> -			err = 0;
> -			with_intel_runtime_pm(&i915->runtime_pm, wakeref)
> -				err = gpu_fill(obj, ctx, engine, dw);
> +			err = gpu_fill(obj, ctx, engine, dw);
>   			if (err) {
>   				pr_err("Failed to fill dword %lu [%lu/%lu] with gpu (%s) in ctx %u [full-ppgtt? %s], err=%d\n",
>   				       ndwords, dw, max_dwords(obj),
> @@ -1488,7 +1472,6 @@ static int igt_vm_isolation(void *arg)
>   	struct drm_i915_private *i915 = arg;
>   	struct i915_gem_context *ctx_a, *ctx_b;
>   	struct intel_engine_cs *engine;
> -	intel_wakeref_t wakeref;
>   	struct igt_live_test t;
>   	struct drm_file *file;
>   	I915_RND_STATE(prng);
> @@ -1535,8 +1518,6 @@ static int igt_vm_isolation(void *arg)
>   	GEM_BUG_ON(ctx_b->vm->total != vm_total);
>   	vm_total -= I915_GTT_PAGE_SIZE;
>   
> -	wakeref = intel_runtime_pm_get(&i915->runtime_pm);
> -
>   	count = 0;
>   	for_each_engine(engine, i915, id) {
>   		IGT_TIMEOUT(end_time);
> @@ -1560,7 +1541,7 @@ static int igt_vm_isolation(void *arg)
>   				err = read_from_scratch(ctx_b, engine,
>   							offset, &value);
>   			if (err)
> -				goto out_rpm;
> +				goto out_unlock;
>   
>   			if (value) {
>   				pr_err("%s: Read %08x from scratch (offset 0x%08x_%08x), after %lu reads!\n",
> @@ -1569,7 +1550,7 @@ static int igt_vm_isolation(void *arg)
>   				       lower_32_bits(offset),
>   				       this);
>   				err = -EINVAL;
> -				goto out_rpm;
> +				goto out_unlock;
>   			}
>   
>   			this++;
> @@ -1579,8 +1560,6 @@ static int igt_vm_isolation(void *arg)
>   	pr_info("Checked %lu scratch offsets across %d engines\n",
>   		count, RUNTIME_INFO(i915)->num_engines);
>   
> -out_rpm:
> -	intel_runtime_pm_put(&i915->runtime_pm, wakeref);
>   out_unlock:
>   	if (igt_live_test_end(&t))
>   		err = -EIO;
> 

Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

Regards,

Tvrtko