[PATCH 23/27] drm/i915/guc: Move GuC priority fields in context under guc_active
Matthew Brost
matthew.brost at intel.com
Thu Aug 19 06:16:35 UTC 2021
Move GuC management fields in context under guc_active struct as this is
where the lock that protects theses fields lives. Also only set guc_prio
field once during context init.
Fixes: ee242ca704d3 ("drm/i915/guc: Implement GuC priority management")
Signed-off-by: Matthew Brost <matthew.brost at intel.com>
Cc: <stable at vger.kernel.org>
---
drivers/gpu/drm/i915/gt/intel_context_types.h | 12 ++--
.../gpu/drm/i915/gt/uc/intel_guc_submission.c | 68 +++++++++++--------
drivers/gpu/drm/i915/i915_trace.h | 2 +-
3 files changed, 45 insertions(+), 37 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 524a35a78bf4..9fb0480ccf3b 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -112,6 +112,7 @@ struct intel_context {
#define CONTEXT_FORCE_SINGLE_SUBMISSION 7
#define CONTEXT_NOPREEMPT 8
#define CONTEXT_LRCA_DIRTY 9
+#define CONTEXT_GUC_INIT 10
struct {
u64 timeout_us;
@@ -178,6 +179,11 @@ struct intel_context {
spinlock_t lock;
/** requests: active requests on this context */
struct list_head requests;
+ /*
+ * GuC priority management
+ */
+ u8 prio;
+ u32 prio_count[GUC_CLIENT_PRIORITY_NUM];
} guc_active;
/* GuC LRC descriptor ID */
@@ -191,12 +197,6 @@ struct intel_context {
*/
struct list_head guc_id_link;
- /*
- * GuC priority management
- */
- u8 guc_prio;
- u32 guc_prio_count[GUC_CLIENT_PRIORITY_NUM];
-
#ifdef CONFIG_DRM_I915_SELFTEST
/**
* @drop_schedule_enable: Force drop of schedule enable G2H for selftest
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 3e90985b0c1b..bb90bedb1305 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -1369,8 +1369,6 @@ static void guc_context_policy_init(struct intel_engine_cs *engine,
desc->preemption_timeout = engine->props.preempt_timeout_ms * 1000;
}
-static inline u8 map_i915_prio_to_guc_prio(int prio);
-
static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
{
struct intel_engine_cs *engine = ce->engine;
@@ -1378,8 +1376,6 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
struct intel_guc *guc = &engine->gt->uc.guc;
u32 desc_idx = ce->guc_id;
struct guc_lrc_desc *desc;
- const struct i915_gem_context *ctx;
- int prio = I915_CONTEXT_DEFAULT_PRIORITY;
bool context_registered;
intel_wakeref_t wakeref;
int ret = 0;
@@ -1396,12 +1392,6 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
context_registered = lrc_desc_registered(guc, desc_idx);
- rcu_read_lock();
- ctx = rcu_dereference(ce->gem_context);
- if (ctx)
- prio = ctx->sched.priority;
- rcu_read_unlock();
-
reset_lrc_desc(guc, desc_idx);
set_lrc_desc_registered(guc, desc_idx, ce);
@@ -1410,8 +1400,7 @@ static int guc_lrc_desc_pin(struct intel_context *ce, bool loop)
desc->engine_submit_mask = adjust_engine_mask(engine->class,
engine->mask);
desc->hw_context_desc = ce->lrc.lrca;
- ce->guc_prio = map_i915_prio_to_guc_prio(prio);
- desc->priority = ce->guc_prio;
+ desc->priority = ce->guc_active.prio;
desc->context_flags = CONTEXT_REGISTRATION_FLAG_KMD;
guc_context_policy_init(engine, desc);
@@ -1813,10 +1802,10 @@ static inline void guc_lrc_desc_unpin(struct intel_context *ce)
static void __guc_context_destroy(struct intel_context *ce)
{
- GEM_BUG_ON(ce->guc_prio_count[GUC_CLIENT_PRIORITY_KMD_HIGH] ||
- ce->guc_prio_count[GUC_CLIENT_PRIORITY_HIGH] ||
- ce->guc_prio_count[GUC_CLIENT_PRIORITY_KMD_NORMAL] ||
- ce->guc_prio_count[GUC_CLIENT_PRIORITY_NORMAL]);
+ GEM_BUG_ON(ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_KMD_HIGH] ||
+ ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_HIGH] ||
+ ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_KMD_NORMAL] ||
+ ce->guc_active.prio_count[GUC_CLIENT_PRIORITY_NORMAL]);
GEM_BUG_ON(ce->guc_state.number_committed_requests);
lrc_fini(ce);
@@ -1926,14 +1915,17 @@ static void guc_context_set_prio(struct intel_guc *guc,
GEM_BUG_ON(prio < GUC_CLIENT_PRIORITY_KMD_HIGH ||
prio > GUC_CLIENT_PRIORITY_NORMAL);
+ lockdep_assert_held(&ce->guc_active.lock);
- if (ce->guc_prio == prio || submission_disabled(guc) ||
- !context_registered(ce))
+ if (ce->guc_active.prio == prio || submission_disabled(guc) ||
+ !context_registered(ce)) {
+ ce->guc_active.prio = prio;
return;
+ }
guc_submission_send_busy_loop(guc, action, ARRAY_SIZE(action), 0, true);
- ce->guc_prio = prio;
+ ce->guc_active.prio = prio;
trace_intel_context_set_prio(ce);
}
@@ -1953,24 +1945,24 @@ static inline void add_context_inflight_prio(struct intel_context *ce,
u8 guc_prio)
{
lockdep_assert_held(&ce->guc_active.lock);
- GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_prio_count));
+ GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_active.prio_count));
- ++ce->guc_prio_count[guc_prio];
+ ++ce->guc_active.prio_count[guc_prio];
/* Overflow protection */
- GEM_WARN_ON(!ce->guc_prio_count[guc_prio]);
+ GEM_WARN_ON(!ce->guc_active.prio_count[guc_prio]);
}
static inline void sub_context_inflight_prio(struct intel_context *ce,
u8 guc_prio)
{
lockdep_assert_held(&ce->guc_active.lock);
- GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_prio_count));
+ GEM_BUG_ON(guc_prio >= ARRAY_SIZE(ce->guc_active.prio_count));
/* Underflow protection */
- GEM_WARN_ON(!ce->guc_prio_count[guc_prio]);
+ GEM_WARN_ON(!ce->guc_active.prio_count[guc_prio]);
- --ce->guc_prio_count[guc_prio];
+ --ce->guc_active.prio_count[guc_prio];
}
static inline void update_context_prio(struct intel_context *ce)
@@ -1983,8 +1975,8 @@ static inline void update_context_prio(struct intel_context *ce)
lockdep_assert_held(&ce->guc_active.lock);
- for (i = 0; i < ARRAY_SIZE(ce->guc_prio_count); ++i) {
- if (ce->guc_prio_count[i]) {
+ for (i = 0; i < ARRAY_SIZE(ce->guc_active.prio_count); ++i) {
+ if (ce->guc_active.prio_count[i]) {
guc_context_set_prio(guc, ce, i);
break;
}
@@ -2123,6 +2115,20 @@ static bool context_needs_register(struct intel_context *ce, bool new_guc_id)
!submission_disabled(ce_to_guc(ce));
}
+static void guc_context_init(struct intel_context *ce)
+{
+ const struct i915_gem_context *ctx;
+ int prio = I915_CONTEXT_DEFAULT_PRIORITY;
+
+ rcu_read_lock();
+ ctx = rcu_dereference(ce->gem_context);
+ if (ctx)
+ prio = ctx->sched.priority;
+ rcu_read_unlock();
+
+ ce->guc_active.prio = map_i915_prio_to_guc_prio(prio);
+}
+
static int guc_request_alloc(struct i915_request *rq)
{
struct intel_context *ce = rq->context;
@@ -2154,6 +2160,9 @@ static int guc_request_alloc(struct i915_request *rq)
rq->reserved_space -= GUC_REQUEST_SIZE;
+ if (unlikely(!test_bit(CONTEXT_GUC_INIT, &ce->flags)))
+ guc_context_init(ce);
+
/*
* Call pin_guc_id here rather than in the pinning step as with
* dma_resv, contexts can be repeatedly pinned / unpinned trashing the
@@ -3031,13 +3040,12 @@ static inline void guc_log_context_priority(struct drm_printer *p,
{
int i;
- drm_printf(p, "\t\tPriority: %d\n",
- ce->guc_prio);
+ drm_printf(p, "\t\tPriority: %d\n", ce->guc_active.prio);
drm_printf(p, "\t\tNumber Requests (lower index == higher priority)\n");
for (i = GUC_CLIENT_PRIORITY_KMD_HIGH;
i < GUC_CLIENT_PRIORITY_NUM; ++i) {
drm_printf(p, "\t\tNumber requests in priority band[%d]: %d\n",
- i, ce->guc_prio_count[i]);
+ i, ce->guc_active.prio_count[i]);
}
drm_printf(p, "\n");
}
diff --git a/drivers/gpu/drm/i915/i915_trace.h b/drivers/gpu/drm/i915/i915_trace.h
index 0a77eb2944b5..6f882e72ed11 100644
--- a/drivers/gpu/drm/i915/i915_trace.h
+++ b/drivers/gpu/drm/i915/i915_trace.h
@@ -910,7 +910,7 @@ DECLARE_EVENT_CLASS(intel_context,
__entry->guc_id = ce->guc_id;
__entry->pin_count = atomic_read(&ce->pin_count);
__entry->sched_state = ce->guc_state.sched_state;
- __entry->guc_prio = ce->guc_prio;
+ __entry->guc_prio = ce->guc_active.prio;
),
TP_printk("guc_id=%d, pin_count=%d sched_state=0x%x, guc_prio=%u",
--
2.32.0
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