[PATCH 21/41] drm/i915/gt: Track timeline GGTT offset separately from subpage offset

Chris Wilson chris at chris-wilson.co.uk
Tue Feb 9 23:26:29 UTC 2021


Currently we know that the timeline status page is at most a page in
size, and so we can preserve the lower 12bits of the offset when
relocating the status page in the GGTT. If we want to use a larger
object, such as the context state, we may not necessarily use a position
within the first page and so need more than 12b.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Reviewed-by: Matthew Brost <matthew.brost at intel.com>
---
 drivers/gpu/drm/i915/gt/gen6_engine_cs.c        |  4 ++--
 drivers/gpu/drm/i915/gt/gen8_engine_cs.c        |  2 +-
 .../drm/i915/gt/intel_execlists_submission.c    |  2 +-
 drivers/gpu/drm/i915/gt/intel_timeline.c        | 17 +++++++----------
 drivers/gpu/drm/i915/gt/intel_timeline_types.h  |  1 +
 drivers/gpu/drm/i915/gt/selftest_engine_cs.c    |  2 +-
 drivers/gpu/drm/i915/gt/selftest_rc6.c          |  2 +-
 drivers/gpu/drm/i915/gt/selftest_timeline.c     | 16 ++++++++--------
 drivers/gpu/drm/i915/i915_scheduler.c           |  2 +-
 9 files changed, 23 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/gen6_engine_cs.c b/drivers/gpu/drm/i915/gt/gen6_engine_cs.c
index ce38d1bcaba3..2f59dd3bdc18 100644
--- a/drivers/gpu/drm/i915/gt/gen6_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/gen6_engine_cs.c
@@ -161,7 +161,7 @@ u32 *gen6_emit_breadcrumb_rcs(struct i915_request *rq, u32 *cs)
 		 PIPE_CONTROL_DC_FLUSH_ENABLE |
 		 PIPE_CONTROL_QW_WRITE |
 		 PIPE_CONTROL_CS_STALL);
-	*cs++ = i915_request_active_timeline(rq)->hwsp_offset |
+	*cs++ = i915_request_active_timeline(rq)->ggtt_offset |
 		PIPE_CONTROL_GLOBAL_GTT;
 	*cs++ = rq->fence.seqno;
 
@@ -359,7 +359,7 @@ u32 *gen7_emit_breadcrumb_rcs(struct i915_request *rq, u32 *cs)
 		 PIPE_CONTROL_QW_WRITE |
 		 PIPE_CONTROL_GLOBAL_GTT_IVB |
 		 PIPE_CONTROL_CS_STALL);
-	*cs++ = i915_request_active_timeline(rq)->hwsp_offset;
+	*cs++ = i915_request_active_timeline(rq)->ggtt_offset;
 	*cs++ = rq->fence.seqno;
 
 	*cs++ = MI_USER_INTERRUPT;
diff --git a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
index d8763146e054..187f1dad1054 100644
--- a/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/gen8_engine_cs.c
@@ -346,7 +346,7 @@ static u32 hwsp_offset(const struct i915_request *rq)
 	if (cl)
 		return cl->ggtt_offset;
 
-	return rcu_dereference_protected(rq->timeline, 1)->hwsp_offset;
+	return rcu_dereference_protected(rq->timeline, 1)->ggtt_offset;
 }
 
 int gen8_emit_init_breadcrumb(struct i915_request *rq)
diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
index 00669aaa737e..6e58f442b688 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -3556,7 +3556,7 @@ static int print_ring(char *buf, int sz, struct i915_request *rq)
 		len = scnprintf(buf, sz,
 				"ring:{start:%08x, hwsp:%08x, seqno:%08x, runtime:%llums}, ",
 				i915_ggtt_offset(rq->ring->vma),
-				tl ? tl->hwsp_offset : 0,
+				tl ? tl->ggtt_offset : 0,
 				hwsp_seqno(rq),
 				DIV_ROUND_CLOSEST_ULL(intel_context_get_total_runtime_ns(rq->context),
 						      1000 * 1000));
diff --git a/drivers/gpu/drm/i915/gt/intel_timeline.c b/drivers/gpu/drm/i915/gt/intel_timeline.c
index 1505dffbaba9..b684322c879c 100644
--- a/drivers/gpu/drm/i915/gt/intel_timeline.c
+++ b/drivers/gpu/drm/i915/gt/intel_timeline.c
@@ -354,13 +354,11 @@ int intel_timeline_pin(struct intel_timeline *tl, struct i915_gem_ww_ctx *ww)
 	if (err)
 		return err;
 
-	tl->hwsp_offset =
-		i915_ggtt_offset(tl->hwsp_ggtt) +
-		offset_in_page(tl->hwsp_offset);
+	tl->ggtt_offset = i915_ggtt_offset(tl->hwsp_ggtt) + tl->hwsp_offset;
 	GT_TRACE(tl->gt, "timeline:%llx using HWSP offset:%x\n",
-		 tl->fence_context, tl->hwsp_offset);
+		 tl->fence_context, tl->ggtt_offset);
 
-	cacheline_acquire(tl->hwsp_cacheline, tl->hwsp_offset);
+	cacheline_acquire(tl->hwsp_cacheline, tl->ggtt_offset);
 	if (atomic_fetch_inc(&tl->pin_count)) {
 		cacheline_release(tl->hwsp_cacheline);
 		__i915_vma_unpin(tl->hwsp_ggtt);
@@ -528,14 +526,13 @@ __intel_timeline_get_seqno(struct intel_timeline *tl,
 
 	vaddr = page_mask_bits(cl->vaddr);
 	tl->hwsp_offset = cacheline * CACHELINE_BYTES;
-	tl->hwsp_seqno =
-		memset(vaddr + tl->hwsp_offset, 0, CACHELINE_BYTES);
+	tl->hwsp_seqno = memset(vaddr + tl->hwsp_offset, 0, CACHELINE_BYTES);
 
-	tl->hwsp_offset += i915_ggtt_offset(vma);
+	tl->ggtt_offset = i915_ggtt_offset(vma) + tl->hwsp_offset;
 	GT_TRACE(tl->gt, "timeline:%llx using HWSP offset:%x\n",
-		 tl->fence_context, tl->hwsp_offset);
+		 tl->fence_context, tl->ggtt_offset);
 
-	cacheline_acquire(cl, tl->hwsp_offset);
+	cacheline_acquire(cl, tl->ggtt_offset);
 	tl->hwsp_cacheline = cl;
 
 	*seqno = timeline_advance(tl);
diff --git a/drivers/gpu/drm/i915/gt/intel_timeline_types.h b/drivers/gpu/drm/i915/gt/intel_timeline_types.h
index 9f677c9b7d06..c5995cc290a0 100644
--- a/drivers/gpu/drm/i915/gt/intel_timeline_types.h
+++ b/drivers/gpu/drm/i915/gt/intel_timeline_types.h
@@ -47,6 +47,7 @@ struct intel_timeline {
 	const u32 *hwsp_seqno;
 	struct i915_vma *hwsp_ggtt;
 	u32 hwsp_offset;
+	u32 ggtt_offset;
 
 	struct intel_timeline_cacheline *hwsp_cacheline;
 
diff --git a/drivers/gpu/drm/i915/gt/selftest_engine_cs.c b/drivers/gpu/drm/i915/gt/selftest_engine_cs.c
index 84d883de30ee..e33ec4e3b35d 100644
--- a/drivers/gpu/drm/i915/gt/selftest_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/selftest_engine_cs.c
@@ -53,7 +53,7 @@ static int write_timestamp(struct i915_request *rq, int slot)
 		cmd++;
 	*cs++ = cmd;
 	*cs++ = i915_mmio_reg_offset(RING_TIMESTAMP(rq->engine->mmio_base));
-	*cs++ = i915_request_timeline(rq)->hwsp_offset + slot * sizeof(u32);
+	*cs++ = i915_request_timeline(rq)->ggtt_offset + slot * sizeof(u32);
 	*cs++ = 0;
 
 	intel_ring_advance(rq, cs);
diff --git a/drivers/gpu/drm/i915/gt/selftest_rc6.c b/drivers/gpu/drm/i915/gt/selftest_rc6.c
index f097e420ac45..285cead849dd 100644
--- a/drivers/gpu/drm/i915/gt/selftest_rc6.c
+++ b/drivers/gpu/drm/i915/gt/selftest_rc6.c
@@ -137,7 +137,7 @@ static const u32 *__live_rc6_ctx(struct intel_context *ce)
 
 	*cs++ = cmd;
 	*cs++ = i915_mmio_reg_offset(GEN8_RC6_CTX_INFO);
-	*cs++ = ce->timeline->hwsp_offset + 8;
+	*cs++ = ce->timeline->ggtt_offset + 8;
 	*cs++ = 0;
 	intel_ring_advance(rq, cs);
 
diff --git a/drivers/gpu/drm/i915/gt/selftest_timeline.c b/drivers/gpu/drm/i915/gt/selftest_timeline.c
index 562a450d2832..6b412228a6fd 100644
--- a/drivers/gpu/drm/i915/gt/selftest_timeline.c
+++ b/drivers/gpu/drm/i915/gt/selftest_timeline.c
@@ -468,7 +468,7 @@ tl_write(struct intel_timeline *tl, struct intel_engine_cs *engine, u32 value)
 
 	i915_request_get(rq);
 
-	err = emit_ggtt_store_dw(rq, tl->hwsp_offset, value);
+	err = emit_ggtt_store_dw(rq, tl->ggtt_offset, value);
 	i915_request_add(rq);
 	if (err) {
 		i915_request_put(rq);
@@ -564,7 +564,7 @@ static int live_hwsp_engine(void *arg)
 
 		if (!err && READ_ONCE(*tl->hwsp_seqno) != n) {
 			GEM_TRACE_ERR("Invalid seqno:%lu stored in timeline %llu @ %x, found 0x%x\n",
-				      n, tl->fence_context, tl->hwsp_offset, *tl->hwsp_seqno);
+				      n, tl->fence_context, tl->ggtt_offset, *tl->hwsp_seqno);
 			GEM_TRACE_DUMP();
 			err = -EINVAL;
 		}
@@ -636,7 +636,7 @@ static int live_hwsp_alternate(void *arg)
 
 		if (!err && READ_ONCE(*tl->hwsp_seqno) != n) {
 			GEM_TRACE_ERR("Invalid seqno:%lu stored in timeline %llu @ %x, found 0x%x\n",
-				      n, tl->fence_context, tl->hwsp_offset, *tl->hwsp_seqno);
+				      n, tl->fence_context, tl->ggtt_offset, *tl->hwsp_seqno);
 			GEM_TRACE_DUMP();
 			err = -EINVAL;
 		}
@@ -696,9 +696,9 @@ static int live_hwsp_wrap(void *arg)
 			goto out;
 		}
 		pr_debug("seqno[0]:%08x, hwsp_offset:%08x\n",
-			 seqno[0], tl->hwsp_offset);
+			 seqno[0], tl->ggtt_offset);
 
-		err = emit_ggtt_store_dw(rq, tl->hwsp_offset, seqno[0]);
+		err = emit_ggtt_store_dw(rq, tl->ggtt_offset, seqno[0]);
 		if (err) {
 			i915_request_add(rq);
 			goto out;
@@ -713,9 +713,9 @@ static int live_hwsp_wrap(void *arg)
 			goto out;
 		}
 		pr_debug("seqno[1]:%08x, hwsp_offset:%08x\n",
-			 seqno[1], tl->hwsp_offset);
+			 seqno[1], tl->ggtt_offset);
 
-		err = emit_ggtt_store_dw(rq, tl->hwsp_offset, seqno[1]);
+		err = emit_ggtt_store_dw(rq, tl->ggtt_offset, seqno[1]);
 		if (err) {
 			i915_request_add(rq);
 			goto out;
@@ -1343,7 +1343,7 @@ static int live_hwsp_recycle(void *arg)
 			if (READ_ONCE(*tl->hwsp_seqno) != count) {
 				GEM_TRACE_ERR("Invalid seqno:%lu stored in timeline %llu @ %x found 0x%x\n",
 					      count, tl->fence_context,
-					      tl->hwsp_offset, *tl->hwsp_seqno);
+					      tl->ggtt_offset, *tl->hwsp_seqno);
 				GEM_TRACE_DUMP();
 				err = -EINVAL;
 			}
diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c
index 90a1263b52e3..66ec51785bba 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.c
+++ b/drivers/gpu/drm/i915/i915_scheduler.c
@@ -1732,7 +1732,7 @@ void i915_sched_show(struct drm_printer *m,
 		drm_printf(m, "\tring->space:  0x%08x\n",
 			   rq->ring->space);
 		drm_printf(m, "\tring->hwsp:   0x%08x\n",
-			   i915_request_active_timeline(rq)->hwsp_offset);
+			   i915_request_active_timeline(rq)->ggtt_offset);
 
 		print_request_ring(m, rq);
 
-- 
2.20.1



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