From: Matthew Brost <matthew.brost@intel.com>
To: <intel-gfx@lists.freedesktop.org>, <dri-devel@lists.freedesktop.org>
Subject: [Intel-gfx] [PATCH 18/46] drm/i915/guc: Ensure GuC schedule operations do not operate on child contexts
Date: Tue, 3 Aug 2021 15:29:15 -0700 [thread overview]
Message-ID: <20210803222943.27686-19-matthew.brost@intel.com> (raw)
In-Reply-To: <20210803222943.27686-1-matthew.brost@intel.com>
In GuC parent-child contexts the parent context controls the scheduling,
ensure only the parent does the scheduling operations.
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
---
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 52 +++++++++++++++----
1 file changed, 41 insertions(+), 11 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 98c1c0b7b087..f23dd716723f 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -405,6 +405,18 @@ static inline void decr_context_blocked(struct intel_context *ce)
ce->guc_state.sched_state -= SCHED_STATE_BLOCKED;
}
+static inline struct intel_context *
+to_parent(struct intel_context *ce)
+{
+ return intel_context_is_child(ce) ? ce->parent : ce;
+}
+
+static inline struct intel_context *
+request_to_scheduling_context(struct i915_request *rq)
+{
+ return to_parent(rq->context);
+}
+
static inline bool context_guc_id_invalid(struct intel_context *ce)
{
return ce->guc_id == GUC_INVALID_LRC_ID;
@@ -711,7 +723,7 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop);
static int tasklet_register_context(struct guc_submit_engine *gse,
struct i915_request *rq)
{
- struct intel_context *ce = rq->context;
+ struct intel_context *ce = request_to_scheduling_context(rq);
struct intel_guc *guc = gse->sched_engine.private_data;
int ret = 0;
@@ -720,6 +732,7 @@ static int tasklet_register_context(struct guc_submit_engine *gse,
GEM_BUG_ON(ce->guc_num_rq_submit_no_id);
GEM_BUG_ON(request_has_no_guc_id(rq));
GEM_BUG_ON(context_guc_id_invalid(ce));
+ GEM_BUG_ON(intel_context_is_child(ce));
GEM_BUG_ON(!atomic_read(&ce->guc_id_ref));
/*
@@ -2355,6 +2368,7 @@ static void __guc_context_sched_disable(struct intel_guc *guc,
GEM_BUG_ON(guc_id == GUC_INVALID_LRC_ID);
#endif
+ GEM_BUG_ON(intel_context_is_child(ce));
trace_intel_context_sched_disable(ce);
guc_submission_send_busy_loop(guc, action, ARRAY_SIZE(action),
@@ -2570,6 +2584,8 @@ static void guc_context_sched_disable(struct intel_context *ce)
u16 guc_id;
bool enabled;
+ GEM_BUG_ON(intel_context_is_child(ce));
+
if (submission_disabled(guc) || context_guc_id_invalid(ce) ||
!lrc_desc_registered(guc, ce->guc_id)) {
clr_context_enabled(ce);
@@ -2971,6 +2987,8 @@ static void guc_signal_context_fence(struct intel_context *ce)
{
unsigned long flags;
+ GEM_BUG_ON(intel_context_is_child(ce));
+
spin_lock_irqsave(&ce->guc_state.lock, flags);
clr_context_wait_for_deregister_to_register(ce);
__guc_signal_context_fence(ce);
@@ -3056,14 +3074,26 @@ static bool context_needs_lrc_desc_pin(struct intel_context *ce, bool new_guc_id
!submission_disabled(ce_to_guc(ce));
}
+static void clear_lrca_dirty(struct intel_context *ce)
+{
+ struct intel_context *child;
+
+ GEM_BUG_ON(intel_context_is_child(ce));
+
+ clear_bit(CONTEXT_LRCA_DIRTY, &ce->flags);
+ for_each_child(ce, child)
+ clear_bit(CONTEXT_LRCA_DIRTY, &child->flags);
+}
+
static int tasklet_pin_guc_id(struct guc_submit_engine *gse,
struct i915_request *rq)
{
- struct intel_context *ce = rq->context;
+ struct intel_context *ce = request_to_scheduling_context(rq);
int ret = 0;
lockdep_assert_held(&gse->sched_engine.lock);
GEM_BUG_ON(!ce->guc_num_rq_submit_no_id);
+ GEM_BUG_ON(intel_context_is_child(ce));
if (atomic_add_unless(&ce->guc_id_ref, ce->guc_num_rq_submit_no_id, 0))
goto out;
@@ -3091,7 +3121,7 @@ static int tasklet_pin_guc_id(struct guc_submit_engine *gse,
gse->submission_stall_reason = STALL_SCHED_DISABLE;
}
- clear_bit(CONTEXT_LRCA_DIRTY, &ce->flags);
+ clear_lrca_dirty(ce);
out:
gse->total_num_rq_with_no_guc_id -= ce->guc_num_rq_submit_no_id;
GEM_BUG_ON(gse->total_num_rq_with_no_guc_id < 0);
@@ -3122,7 +3152,7 @@ static int tasklet_pin_guc_id(struct guc_submit_engine *gse,
static int guc_request_alloc(struct i915_request *rq)
{
- struct intel_context *ce = rq->context;
+ struct intel_context *ce = request_to_scheduling_context(rq);
struct intel_guc *guc = ce_to_guc(ce);
struct guc_submit_engine *gse = ce_to_gse(ce);
unsigned long flags;
@@ -3173,11 +3203,12 @@ static int guc_request_alloc(struct i915_request *rq)
* persistent until the generated request is retired. Thus, sealing these
* race conditions.
*
- * There is no need for a lock here as the timeline mutex ensures at
- * most one context can be executing this code path at once. The
- * guc_id_ref is incremented once for every request in flight and
- * decremented on each retire. When it is zero, a lock around the
- * increment (in pin_guc_id) is needed to seal a race with unpin_guc_id.
+ * There is no need for a lock here as the timeline mutex (or
+ * parallel_submit mutex in the case of multi-lrc) ensures at most one
+ * context can be executing this code path at once. The guc_id_ref is
+ * incremented once for every request in flight and decremented on each
+ * retire. When it is zero, a lock around the increment (in pin_guc_id)
+ * is needed to seal a race with unpin_guc_id.
*/
if (atomic_add_unless(&ce->guc_id_ref, 1, 0))
goto out;
@@ -3215,8 +3246,7 @@ static int guc_request_alloc(struct i915_request *rq)
}
}
- clear_bit(CONTEXT_LRCA_DIRTY, &ce->flags);
-
+ clear_lrca_dirty(ce);
out:
incr_num_rq_not_ready(ce);
--
2.28.0
next prev parent reply other threads:[~2021-08-03 22:12 UTC|newest]
Thread overview: 111+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-03 22:28 [Intel-gfx] [PATCH 00/46] Parallel submission aka multi-bb execbuf Matthew Brost
2021-08-03 22:28 ` [Intel-gfx] [PATCH 01/46] drm/i915/guc: Allow flexible number of context ids Matthew Brost
2021-08-03 22:28 ` [Intel-gfx] [PATCH 02/46] drm/i915/guc: Connect the number of guc_ids to debugfs Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 03/46] drm/i915/guc: Don't return -EAGAIN to user when guc_ids exhausted Matthew Brost
2021-08-05 8:27 ` Daniel Vetter
2021-08-03 22:29 ` [Intel-gfx] [PATCH 04/46] drm/i915/guc: Don't allow requests not ready to consume all guc_ids Matthew Brost
2021-08-05 8:29 ` Daniel Vetter
2021-08-03 22:29 ` [Intel-gfx] [PATCH 05/46] drm/i915/guc: Introduce guc_submit_engine object Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 06/46] drm/i915/guc: Check return of __xa_store when registering a context Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 07/46] drm/i915/guc: Non-static lrc descriptor registration buffer Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 08/46] drm/i915/guc: Take GT PM ref when deregistering context Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 09/46] drm/i915: Add GT PM unpark worker Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 10/46] drm/i915/guc: Take engine PM when a context is pinned with GuC submission Matthew Brost
2021-08-09 14:23 ` Daniel Vetter
2021-08-09 18:11 ` Matthew Brost
2021-08-10 6:43 ` Daniel Vetter
2021-08-10 21:29 ` Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 11/46] drm/i915/guc: Don't call switch_to_kernel_context " Matthew Brost
2021-08-09 14:27 ` Daniel Vetter
2021-08-09 18:20 ` Matthew Brost
2021-08-10 6:47 ` Daniel Vetter
2021-08-11 17:47 ` Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 12/46] drm/i915/guc: Selftest for GuC flow control Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 13/46] drm/i915: Add logical engine mapping Matthew Brost
2021-08-09 14:28 ` Daniel Vetter
2021-08-09 18:28 ` Matthew Brost
2021-08-10 6:49 ` Daniel Vetter
2021-08-03 22:29 ` [Intel-gfx] [PATCH 14/46] drm/i915: Expose logical engine instance to user Matthew Brost
2021-08-09 14:30 ` Daniel Vetter
2021-08-09 18:37 ` Matthew Brost
2021-08-10 6:53 ` Daniel Vetter
2021-08-11 17:55 ` Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 15/46] drm/i915/guc: Introduce context parent-child relationship Matthew Brost
2021-08-09 14:37 ` Daniel Vetter
2021-08-09 14:40 ` Daniel Vetter
2021-08-09 18:45 ` Matthew Brost
2021-08-09 18:44 ` Matthew Brost
2021-08-10 8:45 ` Daniel Vetter
2021-08-03 22:29 ` [Intel-gfx] [PATCH 16/46] drm/i915/guc: Implement GuC parent-child context pin / unpin functions Matthew Brost
2021-08-09 15:17 ` Daniel Vetter
2021-08-09 18:58 ` Matthew Brost
2021-08-10 8:53 ` Daniel Vetter
2021-08-10 9:07 ` Daniel Vetter
2021-08-11 18:06 ` Matthew Brost
2021-08-12 14:45 ` Daniel Vetter
2021-08-12 14:52 ` Daniel Vetter
2021-08-11 18:23 ` Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 17/46] drm/i915/guc: Add multi-lrc context registration Matthew Brost
2021-08-03 22:29 ` Matthew Brost [this message]
2021-08-03 22:29 ` [Intel-gfx] [PATCH 19/46] drm/i915/guc: Assign contexts in parent-child relationship consecutive guc_ids Matthew Brost
2021-08-09 15:31 ` Daniel Vetter
2021-08-09 19:03 ` Matthew Brost
2021-08-10 9:12 ` Daniel Vetter
2021-08-03 22:29 ` [Intel-gfx] [PATCH 20/46] drm/i915/guc: Add hang check to GuC submit engine Matthew Brost
2021-08-09 15:35 ` Daniel Vetter
2021-08-09 19:05 ` Matthew Brost
2021-08-10 9:18 ` Daniel Vetter
2021-08-03 22:29 ` [Intel-gfx] [PATCH 21/46] drm/i915/guc: Add guc_child_context_destroy Matthew Brost
2021-08-09 15:36 ` Daniel Vetter
2021-08-09 19:06 ` Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 22/46] drm/i915/guc: Implement multi-lrc submission Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 23/46] drm/i915/guc: Insert submit fences between requests in parent-child relationship Matthew Brost
2021-08-09 16:32 ` Daniel Vetter
2021-08-09 16:39 ` Matthew Brost
2021-08-09 17:03 ` Daniel Vetter
2021-08-03 22:29 ` [Intel-gfx] [PATCH 24/46] drm/i915/guc: Implement multi-lrc reset Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 25/46] drm/i915/guc: Update debugfs for GuC multi-lrc Matthew Brost
2021-08-09 16:36 ` Daniel Vetter
2021-08-09 19:13 ` Matthew Brost
2021-08-10 9:23 ` Daniel Vetter
2021-08-10 9:27 ` Daniel Vetter
2021-08-10 17:29 ` Matthew Brost
2021-08-11 10:04 ` Daniel Vetter
2021-08-11 17:35 ` Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 26/46] drm/i915: Connect UAPI to GuC multi-lrc interface Matthew Brost
2021-08-09 16:37 ` Daniel Vetter
2021-08-03 22:29 ` [Intel-gfx] [PATCH 27/46] drm/i915/doc: Update parallel submit doc to point to i915_drm.h Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 28/46] drm/i915/guc: Add basic GuC multi-lrc selftest Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 29/46] drm/i915/guc: Extend GuC flow control selftest for multi-lrc Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 30/46] drm/i915/guc: Implement no mid batch preemption " Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 31/46] drm/i915: Move secure execbuf check to execbuf2 Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 32/46] drm/i915: Move input/exec fence handling to i915_gem_execbuffer2 Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 33/46] drm/i915: Move output " Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 34/46] drm/i915: Return output fence from i915_gem_do_execbuffer Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 35/46] drm/i915: Store batch index in struct i915_execbuffer Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 36/46] drm/i915: Allow callers of i915_gem_do_execbuffer to override the batch index Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 37/46] drm/i915: Teach execbuf there can be more than one batch in the objects list Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 38/46] drm/i915: Only track object dependencies on first request Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 39/46] drm/i915: Force parallel contexts to use copy engine for reloc Matthew Brost
2021-08-09 16:39 ` Daniel Vetter
2021-08-03 22:29 ` [Intel-gfx] [PATCH 40/46] drm/i915: Multi-batch execbuffer2 Matthew Brost
2021-08-09 17:02 ` Daniel Vetter
2021-08-03 22:29 ` [Intel-gfx] [PATCH 41/46] drm/i915: Eliminate unnecessary VMA calls for multi-BB submission Matthew Brost
2021-08-09 17:07 ` Daniel Vetter
2021-08-09 17:12 ` Daniel Vetter
2021-08-03 22:29 ` [Intel-gfx] [PATCH 42/46] drm/i915: Hold all parallel requests until last request, properly handle error Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 43/46] drm/i915/guc: Handle errors in multi-lrc requests Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 44/46] drm/i915: Enable multi-bb execbuf Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 45/46] drm/i915/execlists: Weak parallel submission support for execlists Matthew Brost
2021-08-03 22:29 ` [Intel-gfx] [PATCH 46/46] drm/i915/guc: Add delay before disabling scheduling on contexts Matthew Brost
2021-08-09 17:17 ` Daniel Vetter
2021-08-09 19:32 ` Matthew Brost
2021-08-11 9:55 ` Daniel Vetter
2021-08-11 17:43 ` Matthew Brost
2021-08-12 14:04 ` Daniel Vetter
2021-08-12 19:26 ` Daniel Vetter
2021-08-03 22:51 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for Parallel submission aka multi-bb execbuf (rev2) Patchwork
2021-08-03 22:53 ` [Intel-gfx] ✗ Fi.CI.SPARSE: " Patchwork
2021-08-03 22:57 ` [Intel-gfx] ✗ Fi.CI.DOCS: " Patchwork
2021-08-03 23:19 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2021-08-05 3:53 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
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