diff options
| author | Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2021-03-24 12:13:33 +0000 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2021-03-26 00:58:52 +0100 |
| commit | 9b4d0598ee940df33ea6cbbba8c80e951223131b (patch) | |
| tree | e55bf9931bcc6033e9eb11974a7c67a4bbb65f3d /drivers/gpu/drm/i915/i915_request.h | |
| parent | 90a79a91dcc0e8b1986a2ad9b00cf3b281fb09f0 (diff) | |
drm/i915: Request watchdog infrastructure
Prepares the plumbing for setting request/fence expiration time. All code
is put in place but is never activated due yet missing ability to actually
configure the timer.
Outline of the basic operation:
A timer is started when request is ready for execution. If the request
completes (retires) before the timer fires, timer is cancelled and nothing
further happens.
If the timer fires request is added to a lockless list and worker queued.
Purpose of this is twofold: a) It allows request cancellation from a more
friendly context and b) coalesces multiple expirations into a single event
of consuming the list.
Worker locklessly consumes the list of expired requests and cancels them
all using previous added i915_request_cancel().
Associated timeout value is stored in rq->context.watchdog.timeout_us.
v2:
* Log expiration.
v3:
* Include more information about user timeline in the log message.
v4:
* Remove obsolete comment and fix formatting. (Matt)
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210324121335.2307063-6-tvrtko.ursulin@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/i915_request.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_request.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_request.h b/drivers/gpu/drm/i915/i915_request.h index e4d190ab76b2..36071d3d383d 100644 --- a/drivers/gpu/drm/i915/i915_request.h +++ b/drivers/gpu/drm/i915/i915_request.h @@ -26,7 +26,9 @@ #define I915_REQUEST_H #include <linux/dma-fence.h> +#include <linux/hrtimer.h> #include <linux/irq_work.h> +#include <linux/llist.h> #include <linux/lockdep.h> #include "gem/i915_gem_context_types.h" @@ -277,6 +279,12 @@ struct i915_request { /** timeline->request entry for this request */ struct list_head link; + /** Watchdog support fields. */ + struct i915_request_watchdog { + struct llist_node link; + struct hrtimer timer; + } watchdog; + I915_SELFTEST_DECLARE(struct { struct list_head link; unsigned long delay; |