[PATCH 21/23] drm/i915/guc: Move fields protected by guc->contexts_lock into sub structure
Matthew Brost
matthew.brost at intel.com
Thu Sep 9 16:47:42 UTC 2021
To make ownership of locking clear move fields (guc_id, guc_id_ref,
guc_id_link) to sub structure guc_id in intel_context.
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Signed-off-by: Matthew Brost <matthew.brost at intel.com>
---
drivers/gpu/drm/i915/gt/intel_context.c | 4 +-
drivers/gpu/drm/i915/gt/intel_context_types.h | 18 +--
drivers/gpu/drm/i915/gt/selftest_hangcheck.c | 6 +-
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 104 +++++++++---------
drivers/gpu/drm/i915/i915_trace.h | 4 +-
5 files changed, 69 insertions(+), 67 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_context.c b/drivers/gpu/drm/i915/gt/intel_context.c
index 3048267ddc7e..485460a11331 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.c
+++ b/drivers/gpu/drm/i915/gt/intel_context.c
@@ -398,8 +398,8 @@ intel_context_init(struct intel_context *ce, struct intel_engine_cs *engine)
spin_lock_init(&ce->guc_active.lock);
INIT_LIST_HEAD(&ce->guc_active.requests);
- ce->guc_id = GUC_INVALID_LRC_ID;
- INIT_LIST_HEAD(&ce->guc_id_link);
+ ce->guc_id.id = GUC_INVALID_LRC_ID;
+ INIT_LIST_HEAD(&ce->guc_id.link);
/*
* Initialize fence to be complete as this is expected to be complete
diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index b56960a781da..0b00d249c884 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -186,16 +186,18 @@ struct intel_context {
u32 prio_count[GUC_CLIENT_PRIORITY_NUM];
} guc_active;
- /* GuC LRC descriptor ID */
- u16 guc_id;
+ struct {
+ /* GuC LRC descriptor ID */
+ u16 id;
- /* GuC LRC descriptor reference count */
- atomic_t guc_id_ref;
+ /* GuC LRC descriptor reference count */
+ atomic_t ref;
- /*
- * GuC ID link - in list when unpinned but guc_id still valid in GuC
- */
- struct list_head guc_id_link;
+ /*
+ * GuC ID link - in list when unpinned but guc_id still valid in GuC
+ */
+ struct list_head link;
+ } guc_id;
#ifdef CONFIG_DRM_I915_SELFTEST
/**
diff --git a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
index 8be23e0f9306..7e6fdabac599 100644
--- a/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
+++ b/drivers/gpu/drm/i915/gt/selftest_hangcheck.c
@@ -789,7 +789,7 @@ static int __igt_reset_engine(struct intel_gt *gt, bool active)
if (err)
pr_err("[%s] Wait for request %lld:%lld [0x%04X] failed: %d!\n",
engine->name, rq->fence.context,
- rq->fence.seqno, rq->context->guc_id, err);
+ rq->fence.seqno, rq->context->guc_id.id, err);
}
skip:
@@ -1098,7 +1098,7 @@ static int __igt_reset_engines(struct intel_gt *gt,
if (err)
pr_err("[%s] Wait for request %lld:%lld [0x%04X] failed: %d!\n",
engine->name, rq->fence.context,
- rq->fence.seqno, rq->context->guc_id, err);
+ rq->fence.seqno, rq->context->guc_id.id, err);
}
count++;
@@ -1108,7 +1108,7 @@ static int __igt_reset_engines(struct intel_gt *gt,
pr_err("i915_reset_engine(%s:%s): failed to reset request %lld:%lld [0x%04X]\n",
engine->name, test_name,
rq->fence.context,
- rq->fence.seqno, rq->context->guc_id);
+ rq->fence.seqno, rq->context->guc_id.id);
i915_request_put(rq);
GEM_TRACE_DUMP();
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 7e9ee7d5aaab..2c9a6b4ce071 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -270,12 +270,12 @@ static inline void decr_context_committed_requests(struct intel_context *ce)
static inline bool context_guc_id_invalid(struct intel_context *ce)
{
- return ce->guc_id == GUC_INVALID_LRC_ID;
+ return ce->guc_id.id == GUC_INVALID_LRC_ID;
}
static inline void set_context_guc_id_invalid(struct intel_context *ce)
{
- ce->guc_id = GUC_INVALID_LRC_ID;
+ ce->guc_id.id = GUC_INVALID_LRC_ID;
}
static inline struct intel_guc *ce_to_guc(struct intel_context *ce)
@@ -468,14 +468,14 @@ static int guc_add_request(struct intel_guc *guc, struct i915_request *rq)
return 0;
}
- GEM_BUG_ON(!atomic_read(&ce->guc_id_ref));
+ GEM_BUG_ON(!atomic_read(&ce->guc_id.ref));
GEM_BUG_ON(context_guc_id_invalid(ce));
/*
* Corner case where the GuC firmware was blown away and reloaded while
* this context was pinned.
*/
- if (unlikely(!lrc_desc_registered(guc, ce->guc_id))) {
+ if (unlikely(!lrc_desc_registered(guc, ce->guc_id.id))) {
err = guc_lrc_desc_pin(ce, false);
if (unlikely(err))
return err;
@@ -494,14 +494,14 @@ static int guc_add_request(struct intel_guc *guc, struct i915_request *rq)
if (!enabled) {
action[len++] = INTEL_GUC_ACTION_SCHED_CONTEXT_MODE_SET;
- action[len++] = ce->guc_id;
+ action[len++] = ce->guc_id.id;
action[len++] = GUC_CONTEXT_ENABLE;
set_context_pending_enable(ce);
intel_context_get(ce);
g2h_len_dw = G2H_LEN_DW_SCHED_CONTEXT_MODE_SET;
} else {
action[len++] = INTEL_GUC_ACTION_SCHED_CONTEXT;
- action[len++] = ce->guc_id;
+ action[len++] = ce->guc_id.id;
}
err = intel_guc_send_nb(guc, action, len, g2h_len_dw);
@@ -1167,12 +1167,12 @@ static int new_guc_id(struct intel_guc *guc)
static void __release_guc_id(struct intel_guc *guc, struct intel_context *ce)
{
if (!context_guc_id_invalid(ce)) {
- ida_simple_remove(&guc->guc_ids, ce->guc_id);
- reset_lrc_desc(guc, ce->guc_id);
+ ida_simple_remove(&guc->guc_ids, ce->guc_id.id);
+ reset_lrc_desc(guc, ce->guc_id.id);
set_context_guc_id_invalid(ce);
}
- if (!list_empty(&ce->guc_id_link))
- list_del_init(&ce->guc_id_link);
+ if (!list_empty(&ce->guc_id.link))
+ list_del_init(&ce->guc_id.link);
}
static void release_guc_id(struct intel_guc *guc, struct intel_context *ce)
@@ -1194,13 +1194,13 @@ static int steal_guc_id(struct intel_guc *guc)
if (!list_empty(&guc->guc_id_list)) {
ce = list_first_entry(&guc->guc_id_list,
struct intel_context,
- guc_id_link);
+ guc_id.link);
- GEM_BUG_ON(atomic_read(&ce->guc_id_ref));
+ GEM_BUG_ON(atomic_read(&ce->guc_id.ref));
GEM_BUG_ON(context_guc_id_invalid(ce));
- list_del_init(&ce->guc_id_link);
- guc_id = ce->guc_id;
+ list_del_init(&ce->guc_id.link);
+ guc_id = ce->guc_id.id;
spin_lock(&ce->guc_state.lock);
clr_context_registered(ce);
@@ -1236,7 +1236,7 @@ static int pin_guc_id(struct intel_guc *guc, struct intel_context *ce)
int ret = 0;
unsigned long flags, tries = PIN_GUC_ID_TRIES;
- GEM_BUG_ON(atomic_read(&ce->guc_id_ref));
+ GEM_BUG_ON(atomic_read(&ce->guc_id.ref));
try_again:
spin_lock_irqsave(&guc->contexts_lock, flags);
@@ -1244,20 +1244,20 @@ static int pin_guc_id(struct intel_guc *guc, struct intel_context *ce)
might_lock(&ce->guc_state.lock);
if (context_guc_id_invalid(ce)) {
- ret = assign_guc_id(guc, &ce->guc_id);
+ ret = assign_guc_id(guc, &ce->guc_id.id);
if (ret)
goto out_unlock;
ret = 1; /* Indidcates newly assigned guc_id */
}
- if (!list_empty(&ce->guc_id_link))
- list_del_init(&ce->guc_id_link);
- atomic_inc(&ce->guc_id_ref);
+ if (!list_empty(&ce->guc_id.link))
+ list_del_init(&ce->guc_id.link);
+ atomic_inc(&ce->guc_id.ref);
out_unlock:
spin_unlock_irqrestore(&guc->contexts_lock, flags);
/*
- * -EAGAIN indicates no guc_ids are available, let's retire any
+ * -EAGAIN indicates no guc_id are available, let's retire any
* outstanding requests to see if that frees up a guc_id. If the first
* retire didn't help, insert a sleep with the timeslice duration before
* attempting to retire more requests. Double the sleep period each
@@ -1285,15 +1285,15 @@ static void unpin_guc_id(struct intel_guc *guc, struct intel_context *ce)
{
unsigned long flags;
- GEM_BUG_ON(atomic_read(&ce->guc_id_ref) < 0);
+ GEM_BUG_ON(atomic_read(&ce->guc_id.ref) < 0);
if (unlikely(context_guc_id_invalid(ce)))
return;
spin_lock_irqsave(&guc->contexts_lock, flags);
- if (!context_guc_id_invalid(ce) && list_empty(&ce->guc_id_link) &&
- !atomic_read(&ce->guc_id_ref))
- list_add_tail(&ce->guc_id_link, &guc->guc_id_list);
+ if (!context_guc_id_invalid(ce) && list_empty(&ce->guc_id.link) &&
+ !atomic_read(&ce->guc_id.ref))
+ list_add_tail(&ce->guc_id.link, &guc->guc_id_list);
spin_unlock_irqrestore(&guc->contexts_lock, flags);
}
@@ -1316,12 +1316,12 @@ static int register_context(struct intel_context *ce, bool loop)
{
struct intel_guc *guc = ce_to_guc(ce);
u32 offset = intel_guc_ggtt_offset(guc, guc->lrc_desc_pool) +
- ce->guc_id * sizeof(struct guc_lrc_desc);
+ ce->guc_id.id * sizeof(struct guc_lrc_desc);
int ret;
trace_intel_context_register(ce);
- ret = __guc_action_register_context(guc, ce->guc_id, offset, loop);
+ ret = __guc_action_register_context(guc, ce->guc_id.id, offset, loop);
if (likely(!ret)) {
unsigned long flags;
@@ -1390,7 +1390,7 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
struct intel_engine_cs *engine = ce->engine;
struct intel_runtime_pm *runtime_pm = engine->uncore->rpm;
struct intel_guc *guc = &engine->gt->uc.guc;
- u32 desc_idx = ce->guc_id;
+ u32 desc_idx = ce->guc_id.id;
struct guc_lrc_desc *desc;
bool context_registered;
intel_wakeref_t wakeref;
@@ -1453,7 +1453,7 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
* context whose guc_id was stolen.
*/
with_intel_runtime_pm(runtime_pm, wakeref)
- ret = deregister_context(ce, ce->guc_id);
+ ret = deregister_context(ce, ce->guc_id.id);
if (unlikely(ret == -ENODEV))
ret = 0; /* Will get registered later */
} else {
@@ -1524,7 +1524,7 @@ static void __guc_context_sched_enable(struct intel_guc *guc,
{
u32 action[] = {
INTEL_GUC_ACTION_SCHED_CONTEXT_MODE_SET,
- ce->guc_id,
+ ce->guc_id.id,
GUC_CONTEXT_ENABLE
};
@@ -1540,7 +1540,7 @@ static void __guc_context_sched_disable(struct intel_guc *guc,
{
u32 action[] = {
INTEL_GUC_ACTION_SCHED_CONTEXT_MODE_SET,
- guc_id, /* ce->guc_id not stable */
+ guc_id, /* ce->guc_id.id not stable */
GUC_CONTEXT_DISABLE
};
@@ -1585,7 +1585,7 @@ static u16 prep_context_pending_disable(struct intel_context *ce)
guc_blocked_fence_reinit(ce);
intel_context_get(ce);
- return ce->guc_id;
+ return ce->guc_id.id;
}
static struct i915_sw_fence *guc_context_block(struct intel_context *ce)
@@ -1638,7 +1638,7 @@ static bool context_cant_unblock(struct intel_context *ce)
return (ce->guc_state.sched_state & SCHED_STATE_NO_UNBLOCK) ||
context_guc_id_invalid(ce) ||
- !lrc_desc_registered(ce_to_guc(ce), ce->guc_id) ||
+ !lrc_desc_registered(ce_to_guc(ce), ce->guc_id.id) ||
!intel_context_is_pinned(ce);
}
@@ -1757,7 +1757,7 @@ static void guc_context_ban(struct intel_context *ce, struct i915_request *rq)
if (!context_guc_id_invalid(ce))
with_intel_runtime_pm(runtime_pm, wakeref)
__guc_context_set_preemption_timeout(guc,
- ce->guc_id,
+ ce->guc_id.id,
1);
spin_unlock_irqrestore(&ce->guc_state.lock, flags);
}
@@ -1802,11 +1802,11 @@ static inline void guc_lrc_desc_unpin(struct intel_context *ce)
{
struct intel_guc *guc = ce_to_guc(ce);
- GEM_BUG_ON(!lrc_desc_registered(guc, ce->guc_id));
- GEM_BUG_ON(ce != __get_context(guc, ce->guc_id));
+ GEM_BUG_ON(!lrc_desc_registered(guc, ce->guc_id.id));
+ GEM_BUG_ON(ce != __get_context(guc, ce->guc_id.id));
GEM_BUG_ON(context_enabled(ce));
- deregister_context(ce, ce->guc_id);
+ deregister_context(ce, ce->guc_id.id);
}
static void __guc_context_destroy(struct intel_context *ce)
@@ -1851,7 +1851,7 @@ static void guc_context_destroy(struct kref *kref)
__guc_context_destroy(ce);
return;
} else if (submission_disabled(guc) ||
- !lrc_desc_registered(guc, ce->guc_id)) {
+ !lrc_desc_registered(guc, ce->guc_id.id)) {
release_guc_id(guc, ce);
__guc_context_destroy(ce);
return;
@@ -1860,10 +1860,10 @@ static void guc_context_destroy(struct kref *kref)
/*
* We have to acquire the context spinlock and check guc_id again, if it
* is valid it hasn't been stolen and needs to be deregistered. We
- * delete this context from the list of unpinned guc_ids available to
+ * delete this context from the list of unpinned guc_id available to
* steal to seal a race with guc_lrc_desc_pin(). When the G2H CTB
* returns indicating this context has been deregistered the guc_id is
- * returned to the pool of available guc_ids.
+ * returned to the pool of available guc_id.
*/
spin_lock_irqsave(&guc->contexts_lock, flags);
if (context_guc_id_invalid(ce)) {
@@ -1872,8 +1872,8 @@ static void guc_context_destroy(struct kref *kref)
return;
}
- if (!list_empty(&ce->guc_id_link))
- list_del_init(&ce->guc_id_link);
+ if (!list_empty(&ce->guc_id.link))
+ list_del_init(&ce->guc_id.link);
spin_unlock_irqrestore(&guc->contexts_lock, flags);
/* Seal race with Reset */
@@ -1918,7 +1918,7 @@ static void guc_context_set_prio(struct intel_guc *guc,
{
u32 action[] = {
INTEL_GUC_ACTION_SET_CONTEXT_PRIORITY,
- ce->guc_id,
+ ce->guc_id.id,
prio,
};
@@ -2053,7 +2053,7 @@ static void remove_from_context(struct i915_request *rq)
decr_context_committed_requests(ce);
spin_unlock_irq(&ce->guc_state.lock);
- atomic_dec(&ce->guc_id_ref);
+ atomic_dec(&ce->guc_id.ref);
i915_request_notify_execute_cb_imm(rq);
}
@@ -2123,7 +2123,7 @@ static void guc_signal_context_fence(struct intel_context *ce)
static bool context_needs_register(struct intel_context *ce, bool new_guc_id)
{
return (new_guc_id || test_bit(CONTEXT_LRCA_DIRTY, &ce->flags) ||
- !lrc_desc_registered(ce_to_guc(ce), ce->guc_id)) &&
+ !lrc_desc_registered(ce_to_guc(ce), ce->guc_id.id)) &&
!submission_disabled(ce_to_guc(ce));
}
@@ -2179,11 +2179,11 @@ static int guc_request_alloc(struct i915_request *rq)
/*
* Call pin_guc_id here rather than in the pinning step as with
* dma_resv, contexts can be repeatedly pinned / unpinned trashing the
- * guc_ids and creating horrible race conditions. This is especially bad
- * when guc_ids are being stolen due to over subscription. By the time
+ * guc_id and creating horrible race conditions. This is especially bad
+ * when guc_id are being stolen due to over subscription. By the time
* this function is reached, it is guaranteed that the guc_id will be
* persistent until the generated request is retired. Thus, sealing these
- * race conditions. It is still safe to fail here if guc_ids are
+ * race conditions. It is still safe to fail here if guc_id are
* exhausted and return -EAGAIN to the user indicating that they can try
* again in the future.
*
@@ -2193,7 +2193,7 @@ static int guc_request_alloc(struct i915_request *rq)
* 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))
+ if (atomic_add_unless(&ce->guc_id.ref, 1, 0))
goto out;
ret = pin_guc_id(guc, ce); /* returns 1 if new guc_id assigned */
@@ -2206,7 +2206,7 @@ static int guc_request_alloc(struct i915_request *rq)
disable_submission(guc);
goto out; /* GPU will be reset */
}
- atomic_dec(&ce->guc_id_ref);
+ atomic_dec(&ce->guc_id.ref);
unpin_guc_id(guc, ce);
return ret;
}
@@ -3040,7 +3040,7 @@ void intel_guc_submission_print_info(struct intel_guc *guc,
priolist_for_each_request(rq, pl)
drm_printf(p, "guc_id=%u, seqno=%llu\n",
- rq->context->guc_id,
+ rq->context->guc_id.id,
rq->fence.seqno);
}
spin_unlock_irqrestore(&sched_engine->lock, flags);
@@ -3071,7 +3071,7 @@ void intel_guc_submission_print_context_info(struct intel_guc *guc,
xa_lock_irqsave(&guc->context_lookup, flags);
xa_for_each(&guc->context_lookup, index, ce) {
- drm_printf(p, "GuC lrc descriptor %u:\n", ce->guc_id);
+ drm_printf(p, "GuC lrc descriptor %u:\n", ce->guc_id.id);
drm_printf(p, "\tHW Context Desc: 0x%08x\n", ce->lrc.lrca);
drm_printf(p, "\t\tLRC Head: Internal %u, Memory %u\n",
ce->ring->head,
@@ -3082,7 +3082,7 @@ void intel_guc_submission_print_context_info(struct intel_guc *guc,
drm_printf(p, "\t\tContext Pin Count: %u\n",
atomic_read(&ce->pin_count));
drm_printf(p, "\t\tGuC ID Ref Count: %u\n",
- atomic_read(&ce->guc_id_ref));
+ atomic_read(&ce->guc_id.ref));
drm_printf(p, "\t\tSchedule State: 0x%x\n\n",
ce->guc_state.sched_state);
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index 181c5831405b..75a40a33e13a 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -805,7 +805,7 @@ DECLARE_EVENT_CLASS(i915_request,
__entry->dev = rq->engine->i915->drm.primary->index;
__entry->class = rq->engine->uabi_class;
__entry->instance = rq->engine->uabi_instance;
- __entry->guc_id = rq->context->guc_id;
+ __entry->guc_id = rq->context->guc_id.id;
__entry->ctx = rq->fence.context;
__entry->seqno = rq->fence.seqno;
__entry->tail = rq->tail;
@@ -907,7 +907,7 @@ DECLARE_EVENT_CLASS(intel_context,
),
TP_fast_assign(
- __entry->guc_id = ce->guc_id;
+ __entry->guc_id = ce->guc_id.id;
__entry->pin_count = atomic_read(&ce->pin_count);
__entry->sched_state = ce->guc_state.sched_state;
__entry->guc_prio = ce->guc_active.prio;
--
2.32.0
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