Currently, we only combine a sentinel request with a max-priority
barrier such that a sentinel request is always in ELSP[0] with nothing
following it. However, we will want to create similar ELSP[] submissions
providing a full-barrier in the submission queue, but without forcing
maximum priority. As such I915_FENCE_FLAG_SENTINEL takes on the
single-submission property and so we can remove the gvt special casing.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/gt/intel_context.h | 24 +++++++-------
drivers/gpu/drm/i915/gt/intel_context_types.h | 4 +--
drivers/gpu/drm/i915/gt/intel_lrc.c | 33 +++++--------------
drivers/gpu/drm/i915/gvt/scheduler.c | 7 ++--
4 files changed, 26 insertions(+), 42 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/intel_context.h
b/drivers/gpu/drm/i915/gt/intel_context.h
index 18efad255124..ee5d47165c12 100644
--- a/drivers/gpu/drm/i915/gt/intel_context.h
+++ b/drivers/gpu/drm/i915/gt/intel_context.h
@@ -198,18 +198,6 @@ static inline bool intel_context_set_banned(struct
intel_context *ce)
return test_and_set_bit(CONTEXT_BANNED, &ce->flags);
}
-static inline bool
-intel_context_force_single_submission(const struct intel_context *ce)
-{
- return test_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ce->flags);
-}
-
-static inline void
-intel_context_set_single_submission(struct intel_context *ce)
-{
- __set_bit(CONTEXT_FORCE_SINGLE_SUBMISSION, &ce->flags);
-}
-
static inline bool
intel_context_nopreempt(const struct intel_context *ce)
{
@@ -228,6 +216,18 @@ intel_context_clear_nopreempt(struct intel_context *ce)
clear_bit(CONTEXT_NOPREEMPT, &ce->flags);
}
+static inline bool
+intel_context_is_gvt(const struct intel_context *ce)
+{
+ return test_bit(CONTEXT_GVT, &ce->flags);
+}
+
+static inline void
+intel_context_set_gvt(struct intel_context *ce)
+{
+ set_bit(CONTEXT_GVT, &ce->flags);
+}
+
static inline u64 intel_context_get_total_runtime_ns(struct intel_context *ce)
{
const u32 period =
diff --git a/drivers/gpu/drm/i915/gt/intel_context_types.h
b/drivers/gpu/drm/i915/gt/intel_context_types.h
index 0f3b68b95c56..fd2703efc10c 100644
--- a/drivers/gpu/drm/i915/gt/intel_context_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_context_types.h
@@ -64,8 +64,8 @@ struct intel_context {
#define CONTEXT_VALID_BIT 2
#define CONTEXT_USE_SEMAPHORES 3
#define CONTEXT_BANNED 4
-#define CONTEXT_FORCE_SINGLE_SUBMISSION 5
-#define CONTEXT_NOPREEMPT 6
+#define CONTEXT_NOPREEMPT 5
+#define CONTEXT_GVT 6
u32 *lrc_reg_state;
u64 lrc_desc;
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c
b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 112531b29f59..30a5b4049504 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -1579,22 +1579,10 @@ static void execlists_submit_ports(struct
intel_engine_cs *engine)
writel(EL_CTRL_LOAD, execlists->ctrl_reg);
}
-static bool ctx_single_port_submission(const struct intel_context *ce)
-{
- return (IS_ENABLED(CONFIG_DRM_I915_GVT) &&
- intel_context_force_single_submission(ce));
-}
-
static bool can_merge_ctx(const struct intel_context *prev,
const struct intel_context *next)
{
- if (prev != next)
- return false;
-
- if (ctx_single_port_submission(prev))
- return false;
-
- return true;
+ return prev == next;
}
static unsigned long i915_request_flags(const struct i915_request *rq)
@@ -1844,6 +1832,12 @@ static inline void clear_ports(struct i915_request
**ports, int count)
memset_p((void **)ports, NULL, count);
}
+static bool has_sentinel(struct i915_request *prev, struct i915_request *next)
+{
+ return (i915_request_flags(prev) | i915_request_flags(next)) &
+ BIT(I915_FENCE_FLAG_NOPREEMPT);
+}
+
static void execlists_dequeue(struct intel_engine_cs *engine)
{
struct intel_engine_execlists * const execlists = &engine->execlists;
@@ -2125,18 +2119,7 @@ static void execlists_dequeue(struct intel_engine_cs
*engine)
if (last->context == rq->context)
goto done;
- if (i915_request_has_sentinel(last))
- goto done;
-
- /*
- * If GVT overrides us we only ever submit
- * port[0], leaving port[1] empty. Note that we
- * also have to be careful that we don't queue
- * the same context (even though a different
- * request) to the second port.
- */
- if (ctx_single_port_submission(last->context) ||
- ctx_single_port_submission(rq->context))
+ if (has_sentinel(last, rq))
goto done;
merge = false;
diff --git a/drivers/gpu/drm/i915/gvt/scheduler.c
b/drivers/gpu/drm/i915/gvt/scheduler.c
index 1c95bf8cbed0..4fccf4b194b0 100644
--- a/drivers/gpu/drm/i915/gvt/scheduler.c
+++ b/drivers/gpu/drm/i915/gvt/scheduler.c
@@ -204,9 +204,9 @@ static int populate_shadow_context(struct
intel_vgpu_workload *workload)
return 0;
}
-static inline bool is_gvt_request(struct i915_request *rq)
+static inline bool is_gvt_request(const struct i915_request *rq)
{
- return intel_context_force_single_submission(rq->context);
+ return intel_context_is_gvt(rq->context);
}
static void save_ring_hw_state(struct intel_vgpu *vgpu,
@@ -401,6 +401,7 @@ intel_gvt_workload_req_alloc(struct intel_vgpu_workload
*workload)
return PTR_ERR(rq);
}
+ __set_bit(I915_FENCE_FLAG_SENTINEL, &rq->fence.flags);
workload->req = i915_request_get(rq);
return 0;
}
@@ -1226,7 +1227,7 @@ int intel_vgpu_setup_submission(struct intel_vgpu *vgpu)
i915_vm_put(ce->vm);
ce->vm = i915_vm_get(&ppgtt->vm);
- intel_context_set_single_submission(ce);
+ intel_context_set_gvt(ce);
/* Max ring buffer size */
if (!intel_uc_wants_guc_submission(&engine->gt->uc)) {
--
2.20.1
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