Due to render mmio switch, GVT context cannot be scheduled with the host
i915 context together in a ELSP combo. Currently we will only allow the
a single submission if host i915 will schedule a GVT context.
At the time of schedule-in/out a GVT context, host i915 has to notify
GVT-g the status of GVT context has been changed. so that GVT-g can copy
the content of a GVT context back into the guest execlist context.
Signed-off-by: Zhi Wang <zhi.a.w...@intel.com>
---
drivers/gpu/drm/i915/intel_lrc.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 830133d..42638e0 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -449,6 +449,9 @@ static void execlists_context_unqueue(struct
intel_engine_cs *ring)
execlist_link) {
if (!req0) {
req0 = cursor;
+ /* single submission for gvt context */
+ if (req0->ctx->gvt_context)
+ break;
} else if (req0->ctx == cursor->ctx) {
/* Same ctx: ignore first request, as second request
* will update tail past first request's workload */
@@ -457,7 +460,9 @@ static void execlists_context_unqueue(struct
intel_engine_cs *ring)
&ring->execlist_retired_req_list);
req0 = cursor;
} else {
- req1 = cursor;
+ if (!cursor->ctx->gvt_context)
+ req1 = cursor;
+
break;
}
}
@@ -484,6 +489,11 @@ static void execlists_context_unqueue(struct
intel_engine_cs *ring)
WARN_ON(req1 && req1->elsp_submitted);
+ if (req0->ctx->gvt_context) {
+ struct intel_context *ctx = req0->ctx;
+
ctx->gvt_context_schedule_in(ctx->gvt_context_private_data[ring->id]);
+ }
+
execlists_submit_requests(req0, req1);
}
@@ -504,6 +514,10 @@ static bool execlists_check_remove_request(struct
intel_engine_cs *ring,
"Never submitted head request\n");
if (--head_req->elsp_submitted <= 0) {
+ if (head_req->ctx->gvt_context) {
+ struct intel_context *ctx =
head_req->ctx;
+
ctx->gvt_context_schedule_out(ctx->gvt_context_private_data[ring->id]);
+ }
list_move_tail(&head_req->execlist_link,
&ring->execlist_retired_req_list);
return true;
--
1.9.1
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