4 files changed, 66 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/Kconfig.profile b/drivers/gpu/drm/i915/Kconfig.profile
index 35bbe2b80596..39328567c200 100644
--- a/drivers/gpu/drm/i915/Kconfig.profile
+++ b/drivers/gpu/drm/i915/Kconfig.profile
@@ -1,3 +1,17 @@
+config DRM_I915_REQUEST_TIMEOUT
+	int "Default timeout for requests (ms)"
+	default 20000 # milliseconds
+	help
+	  Configures the default timeout after which any user submissions will
+	  be forcefully terminated.
+
+	  Beware setting this value lower, or close to heartbeat interval
+	  rounded to whole seconds times three, in order to avoid allowing
+	  misbehaving applications causing total rendering failure in unrelated
+	  clients.
+
+	  May be 0 to disable the timeout.
+
 config DRM_I915_FENCE_TIMEOUT
 	int "Timeout for unsignaled foreign fences (ms, jiffy granularity)"
 	default 10000 # milliseconds
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index 9b031d88046f..11e799951d86 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -232,6 +232,8 @@ static void intel_context_set_gem(struct intel_context *ce,
 	if (ctx->sched.priority >= I915_PRIORITY_NORMAL &&
 	    intel_engine_has_timeslices(ce->engine))
 		__set_bit(CONTEXT_USE_SEMAPHORES, &ce->flags);
+
+	intel_context_set_watchdog_us(ce, ctx->watchdog.timeout_us);
 }
 
 static void __free_engines(struct i915_gem_engines *e, unsigned int count)
@@ -790,6 +792,40 @@ 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))
+		return;
+
+	/* Default expiry for user fences. */
+	ret = __set_watchdog(ctx, CONFIG_DRM_I915_REQUEST_TIMEOUT * 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)
 {
@@ -834,6 +870,8 @@ 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 1449f54924e0..340473aa70de 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context_types.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context_types.h
@@ -154,6 +154,10 @@ 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 f053d8633fe2..3ecacc675f41 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_param.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_param.h
@@ -6,9 +6,18 @@
 #ifndef INTEL_CONTEXT_PARAM_H
 #define INTEL_CONTEXT_PARAM_H
 
-struct intel_context;
+#include <linux/types.h>
+
+#include "intel_context.h"
 
 int intel_context_set_ring_size(struct intel_context *ce, long sz);
 long intel_context_get_ring_size(struct intel_context *ce);
 
+static inline int
+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 */