All of lore.kernel.org
 help / color / mirror / Atom feed
From: Matthew Brost <matthew.brost@intel.com>
To: <intel-gfx@lists.freedesktop.org>, drmdevel@freedesktop.org
Cc: <daniel.vetter@ffwll.ch>
Subject: [Intel-gfx] [PATCH 14/21] drm/i915/guc: Flush G2H work queue during reset
Date: Sun, 15 Aug 2021 13:15:52 -0700	[thread overview]
Message-ID: <20210815201559.1150-15-matthew.brost@intel.com> (raw)
In-Reply-To: <20210815201559.1150-1-matthew.brost@intel.com>

It isn't safe to scrub for missing G2H or continue with the reset until
all G2H processing is complete. Flush the G2H work queue during reset to
ensure it is done running.

Fixes: eb5e7da736f3 ("drm/i915/guc: Reset implementation for new GuC interface")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c  | 18 ++----------------
 1 file changed, 2 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
index a8ac446f32f3..54c0914b21f3 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -707,8 +707,6 @@ static void guc_flush_submissions(struct intel_guc *guc)
 
 void intel_guc_submission_reset_prepare(struct intel_guc *guc)
 {
-	int i;
-
 	if (unlikely(!guc_submission_initialized(guc))) {
 		/* Reset called during driver load? GuC not yet initialised! */
 		return;
@@ -724,20 +722,8 @@ void intel_guc_submission_reset_prepare(struct intel_guc *guc)
 
 	guc_flush_submissions(guc);
 
-	/*
-	 * Handle any outstanding G2Hs before reset. Call IRQ handler directly
-	 * each pass as interrupt have been disabled. We always scrub for
-	 * outstanding G2H as it is possible for outstanding_submission_g2h to
-	 * be incremented after the context state update.
-	 */
-	for (i = 0; i < 4 && atomic_read(&guc->outstanding_submission_g2h); ++i) {
-		intel_guc_to_host_event_handler(guc);
-#define wait_for_reset(guc, wait_var) \
-		intel_guc_wait_for_pending_msg(guc, wait_var, false, (HZ / 20))
-		do {
-			wait_for_reset(guc, &guc->outstanding_submission_g2h);
-		} while (!list_empty(&guc->ct.requests.incoming));
-	}
+	flush_work(&guc->ct.requests.worker);
+
 	scrub_guc_desc_for_outstanding_g2h(guc);
 }
 
-- 
2.32.0


  parent reply	other threads:[~2021-08-15 20:21 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-15 20:15 [Intel-gfx] [PATCH 00/21] Clean up GuC CI failures, simplify locking, and kernel DOC Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 01/21] drm/i915/guc: Fix blocked context accounting Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 02/21] drm/i915/guc: outstanding G2H accounting Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 03/21] drm/i915/guc: Unwind context requests in reverse order Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 04/21] drm/i915/guc: Don't drop ce->guc_active.lock when unwinding context Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 05/21] drm/i915/guc: Workaround reset G2H is received after schedule done G2H Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 06/21] drm/i915/selftests: Add a cancel request selftest that triggers a reset Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 07/21] drm/i915/guc: Don't enable scheduling on a banned context, guc_id invalid, not registered Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 08/21] drm/i915/selftests: Fix memory corruption in live_lrc_isolation Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 09/21] drm/i915/selftests: Add initial GuC selftest for scrubbing lost G2H Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 10/21] drm/i915/guc: Take context ref when cancelling request Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 11/21] drm/i915/guc: Don't touch guc_state.sched_state without a lock Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 12/21] drm/i915/guc: Reset LRC descriptor if register returns -ENODEV Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 13/21] drm/i915: Allocate error capture in atomic context Matthew Brost
2021-08-15 20:15 ` Matthew Brost [this message]
2021-08-15 20:15 ` [Intel-gfx] [PATCH 15/21] drm/i915/guc: Release submit fence from an IRQ Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 16/21] drm/i915/guc: Move guc_blocked fence to struct guc_state Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 17/21] drm/i915/guc: Rework and simplify locking Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 18/21] drm/i915/guc: Proper xarray usage for contexts_lookup Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 19/21] drm/i915/guc: Drop pin count check trick between sched_disable and re-pin Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 20/21] drm/i915/guc: Move GuC priority fields in context under guc_active Matthew Brost
2021-08-15 20:15 ` [Intel-gfx] [PATCH 21/21] drm/i915/guc: Add GuC kernel doc Matthew Brost
2021-08-15 20:33 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for Clean up GuC CI failures, simplify locking, and kernel DOC Patchwork
2021-08-15 20:35 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork
2021-08-15 21:15 ` [Intel-gfx] ✗ Fi.CI.BAT: failure " Patchwork
2021-08-15 21:54   ` Matthew Brost

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210815201559.1150-15-matthew.brost@intel.com \
    --to=matthew.brost@intel.com \
    --cc=daniel.vetter@ffwll.ch \
    --cc=drmdevel@freedesktop.org \
    --cc=intel-gfx@lists.freedesktop.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.