drm/i915: Move the ban period onto the context

This will allow us to set per-file, or even per-context, periods in the
future.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

3 files changed, 9 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index da52f9cdc5df..ee841349407e 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -678,6 +678,11 @@ struct i915_ctx_hang_stats {
         /* Time when this context was last blamed for a GPU reset */
         unsigned long guilty_ts;
 
+        /* If the contexts causes a second GPU hang within this time,
+         * it is permanently banned from submitting any more work.
+         */
+        unsigned long ban_period_seconds;
+
         /* This context is banned to submit more work */
         bool banned;
 };
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 9cd457ae4427..3f6ca46a1dfe 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2535,7 +2535,8 @@ static bool i915_context_is_banned(struct drm_i915_private *dev_priv,
         if (ctx->hang_stats.banned)
                 return true;
 
-        if (elapsed <= DRM_I915_CTX_BAN_PERIOD) {
+        if (ctx->hang_stats.ban_period_seconds &&
+            elapsed <= ctx->hang_stats.ban_period_seconds) {
                 if (!i915_gem_context_is_default(ctx)) {
                         DRM_DEBUG("context hanging too fast, banning!\n");
                         return true;
diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index b9deade53f2e..1d10c21f979b 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -222,6 +222,8 @@ __create_hw_context(struct drm_device *dev,
          * is no remap info, it will be a NOP. */
         ctx->remap_slice = (1 << NUM_L3_SLICES(dev)) - 1;
 
+        ctx->hang_stats.ban_period_seconds = DRM_I915_CTX_BAN_PERIOD;
+
         return ctx;
 
 err_out: