Re: [PATCH 03/21] drm/i915/gem: Set the watchdog timeout directly in intel_context_set_gem

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On 23/04/2021 23:31, Jason Ekstrand wrote:
Instead of handling it like a context param, unconditionally set it when
intel_contexts are created.  This doesn't fix anything but does simplify
the code a bit.

Signed-off-by: Jason Ekstrand <jason@xxxxxxxxxxxxxx>
---
  drivers/gpu/drm/i915/gem/i915_gem_context.c   | 43 +++----------------
  .../gpu/drm/i915/gem/i915_gem_context_types.h |  4 --
  drivers/gpu/drm/i915/gt/intel_context_param.h |  3 +-
  3 files changed, 6 insertions(+), 44 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index 35bcdeddfbf3f..1091cc04a242a 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -233,7 +233,11 @@ static void intel_context_set_gem(struct intel_context *ce,
  	    intel_engine_has_timeslices(ce->engine))
  		__set_bit(CONTEXT_USE_SEMAPHORES, &ce->flags);
- intel_context_set_watchdog_us(ce, ctx->watchdog.timeout_us);
+	if (IS_ACTIVE(CONFIG_DRM_I915_REQUEST_TIMEOUT) &&
+	    ctx->i915->params.request_timeout_ms) {
+		unsigned int timeout_ms = ctx->i915->params.request_timeout_ms;
+		intel_context_set_watchdog_us(ce, (u64)timeout_ms * 1000);

Blank line between declarations and code please, or just lose the local.

Otherwise looks okay. Slight change that same GEM context can now have a mix of different request expirations isn't interesting I think. At least the change goes away by the end of the series.

Regards,

Tvrtko

+	}
  }
static void __free_engines(struct i915_gem_engines *e, unsigned int count)
@@ -792,41 +796,6 @@ static void __assign_timeline(struct i915_gem_context *ctx,
  	context_apply_all(ctx, __apply_timeline, timeline);
  }
-static int __apply_watchdog(struct intel_context *ce, void *timeout_us)
-{
-	return intel_context_set_watchdog_us(ce, (uintptr_t)timeout_us);
-}
-
-static int
-__set_watchdog(struct i915_gem_context *ctx, unsigned long timeout_us)
-{
-	int ret;
-
-	ret = context_apply_all(ctx, __apply_watchdog,
-				(void *)(uintptr_t)timeout_us);
-	if (!ret)
-		ctx->watchdog.timeout_us = timeout_us;
-
-	return ret;
-}
-
-static void __set_default_fence_expiry(struct i915_gem_context *ctx)
-{
-	struct drm_i915_private *i915 = ctx->i915;
-	int ret;
-
-	if (!IS_ACTIVE(CONFIG_DRM_I915_REQUEST_TIMEOUT) ||
-	    !i915->params.request_timeout_ms)
-		return;
-
-	/* Default expiry for user fences. */
-	ret = __set_watchdog(ctx, i915->params.request_timeout_ms * 1000);
-	if (ret)
-		drm_notice(&i915->drm,
-			   "Failed to configure default fence expiry! (%d)",
-			   ret);
-}
-
  static struct i915_gem_context *
  i915_gem_create_context(struct drm_i915_private *i915, unsigned int flags)
  {
@@ -871,8 +840,6 @@ i915_gem_create_context(struct drm_i915_private *i915, unsigned int flags)
  		intel_timeline_put(timeline);
  	}
- __set_default_fence_expiry(ctx);
-
  	trace_i915_context_create(ctx);
return ctx;
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context_types.h b/drivers/gpu/drm/i915/gem/i915_gem_context_types.h
index 5ae71ec936f7c..676592e27e7d2 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context_types.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context_types.h
@@ -153,10 +153,6 @@ struct i915_gem_context {
  	 */
  	atomic_t active_count;
- struct {
-		u64 timeout_us;
-	} watchdog;
-
  	/**
  	 * @hang_timestamp: The last time(s) this context caused a GPU hang
  	 */
diff --git a/drivers/gpu/drm/i915/gt/intel_context_param.h b/drivers/gpu/drm/i915/gt/intel_context_param.h
index dffedd983693d..0c69cb42d075c 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_param.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_param.h
@@ -10,11 +10,10 @@
#include "intel_context.h" -static inline int
+static inline void
  intel_context_set_watchdog_us(struct intel_context *ce, u64 timeout_us)
  {
  	ce->watchdog.timeout_us = timeout_us;
-	return 0;
  }
#endif /* INTEL_CONTEXT_PARAM_H */

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