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authorChris Wilson <chris@chris-wilson.co.uk>2019-10-14 15:13:36 +0300
committerChris Wilson <chris@chris-wilson.co.uk>2019-10-14 23:10:59 +0300
commit3c00660db18371c632adae4836ed2b2d3d78ecb6 (patch)
treea81f26db4aef103e46d9504b85e3352e72eb0725 /drivers/gpu/drm/i915/i915_gem.h
parent53448aed7b805cf36ecc59ed5fe8e53815ce4fe8 (diff)
downloadlinux-3c00660db18371c632adae4836ed2b2d3d78ecb6.tar.xz
drm/i915/execlists: Assert tasklet is locked for process_csb()
We rely on only the tasklet being allowed to call into process_csb(), so assert that is locked when we do. As the tasklet uses a simple bitlock, there is no strong lockdep checking so we must make do with a plain assertion that the tasklet is running and assume that we are the tasklet! v2: Fixup intel_gt_sanitize() to prepare each engine for the reset so that the locks are marked as held during the reset v3: Check for existent function pointers for very early sanitisation. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191014121336.30137-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/i915_gem.h')
-rw-r--r--drivers/gpu/drm/i915/i915_gem.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.h b/drivers/gpu/drm/i915/i915_gem.h
index db20d2b0842b..f6f9675848b8 100644
--- a/drivers/gpu/drm/i915/i915_gem.h
+++ b/drivers/gpu/drm/i915/i915_gem.h
@@ -86,6 +86,11 @@ static inline void tasklet_lock(struct tasklet_struct *t)
cpu_relax();
}
+static inline bool tasklet_is_locked(const struct tasklet_struct *t)
+{
+ return test_bit(TASKLET_STATE_RUN, &t->state);
+}
+
static inline void __tasklet_disable_sync_once(struct tasklet_struct *t)
{
if (!atomic_fetch_inc(&t->count))