From e068ef3fd5a3574359b80ff823089ca59057f9c8 Mon Sep 17 00:00:00 2001
From: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Date: Mon, 14 Feb 2022 17:11:23 -0800
Subject: [PATCH] drm/i915/guc: Initialize GuC submission locks and queues
early
Move initialization of submission-related spinlock, lists and workers to
init_early. This fixes an issue where if the GuC init fails we might
still try to get the lock in the context cleanup code. Note that it is
safe to call the GuC context cleanup code even if the init failed
because all contexts are initialized with an invalid GuC ID, which will
cause the GuC side of the cleanup to be skipped, so it is easier to just
make sure the variables are initialized than to special case the cleanup
to handle the case when they're not.
References: https://gitlab.freedesktop.org/drm/intel/-/issues/4932
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220215011123.734572-1-daniele.ceraolospurio@intel.com
---
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 27 ++++++++++---------
1 file changed, 14 insertions(+), 13 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 25cac44583d90..b0de9110884a4 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1818,24 +1818,11 @@ int intel_guc_submission_init(struct intel_guc *guc)
*/
GEM_BUG_ON(!guc->lrc_desc_pool);
- xa_init_flags(&guc->context_lookup, XA_FLAGS_LOCK_IRQ);
-
- spin_lock_init(&guc->submission_state.lock);
- INIT_LIST_HEAD(&guc->submission_state.guc_id_list);
- ida_init(&guc->submission_state.guc_ids);
- INIT_LIST_HEAD(&guc->submission_state.destroyed_contexts);
- INIT_WORK(&guc->submission_state.destroyed_worker,
- destroyed_worker_func);
- INIT_WORK(&guc->submission_state.reset_fail_worker,
- reset_fail_worker_func);
-
guc->submission_state.guc_ids_bitmap =
bitmap_zalloc(NUMBER_MULTI_LRC_GUC_ID(guc), GFP_KERNEL);
if (!guc->submission_state.guc_ids_bitmap)
return -ENOMEM;
- spin_lock_init(&guc->timestamp.lock);
- INIT_DELAYED_WORK(&guc->timestamp.work, guc_timestamp_ping);
guc->timestamp.ping_delay = (POLL_TIME_CLKS / gt->clock_frequency + 1) * HZ;
guc->timestamp.shift = gpm_timestamp_shift(gt);
@@ -3831,6 +3818,20 @@ static bool __guc_submission_selected(struct intel_guc *guc)
void intel_guc_submission_init_early(struct intel_guc *guc)
{
+ xa_init_flags(&guc->context_lookup, XA_FLAGS_LOCK_IRQ);
+
+ spin_lock_init(&guc->submission_state.lock);
+ INIT_LIST_HEAD(&guc->submission_state.guc_id_list);
+ ida_init(&guc->submission_state.guc_ids);
+ INIT_LIST_HEAD(&guc->submission_state.destroyed_contexts);
+ INIT_WORK(&guc->submission_state.destroyed_worker,
+ destroyed_worker_func);
+ INIT_WORK(&guc->submission_state.reset_fail_worker,
+ reset_fail_worker_func);
+
+ spin_lock_init(&guc->timestamp.lock);
+ INIT_DELAYED_WORK(&guc->timestamp.work, guc_timestamp_ping);
+
guc->submission_state.num_guc_ids = GUC_MAX_LRC_DESCRIPTORS;
guc->submission_supported = __guc_submission_supported(guc);
guc->submission_selected = __guc_submission_selected(guc);
--
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