[Intel-gfx] [PATCH v2 0/4]

[Intel-gfx] [PATCH v2 0/4]

[Daniele Ceraolo Spurio]

Now that we have a common set of function for general lrc management,
the only remaining dependency the guc submission code has towards the
execlists submission is the engine setup. This series gets rid of that
by copying the required execlists setup function in the GuC submission
file; the copied functions have been further simplified by removing all
the parts that are specific to the execlists submission back-end.

To make the work easier, a bunch of GuC code that is not applicable to
the latest GuC submission flow (which should be posted soon-ish) is
removed as part of the series.

v2: address comments from Chris. I've also removed the interrupt
patch from teh series; I'm playing with a couple of possible
alternatives and will send the patch on its own later. There is no issue
in not including the patch yet since GuC submission can't be turned on.

Cc: John Harrison <John.C.Harrison@Intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>

Daniele Ceraolo Spurio (3):
  drm/i915/guc: do not dump execlists state with GuC submission
  drm/i915/guc: init engine directly in GuC submission mode
  drm/i915/guc: stop calling execlists_set_default_submission

Matthew Brost (1):
  drm/i915/guc: Delete GuC code unused in future patches

 drivers/gpu/drm/i915/gt/intel_engine_cs.c     |  12 +-
 .../drm/i915/gt/intel_execlists_submission.c  |   9 +-
 .../drm/i915/gt/intel_execlists_submission.h  |   2 -
 drivers/gpu/drm/i915/gt/uc/intel_guc.c        |  16 +-
 drivers/gpu/drm/i915/gt/uc/intel_guc.h        |   7 -
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 442 ++++++++++--------
 .../gpu/drm/i915/gt/uc/intel_guc_submission.h |   1 +
 7 files changed, 267 insertions(+), 222 deletions(-)

-- 
2.29.2

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[Intel-gfx] [PATCH v2 1/4] drm/i915/guc: Delete GuC code unused in future patches

[Daniele Ceraolo Spurio]

From: Matthew Brost <matthew.brost@intel.com>

Delete GuC code unused in future patches that rewrite the GuC interface
to work with the new firmware. Most of the code deleted relates to
workqueues or execlist port. The code is safe to remove because we still
don't allow GuC submission to be enabled, even when overriding the
modparam, so it currently can't be reached.

The defines + structs for the process descriptor and workqueue remain.
Although the new GuC interface does not require either of these for the
normal submission path multi-lrc submission does. The usage of the
process descriptor and workqueue for multi-lrc will be quite different
from the code that is deleted in this patch. A future patch will
implement multi-lrc submission.

v2: add a code in the commit message about the code being safe to
remove (Chris)

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: John Harrison <john.c.harrison@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc.c        |  16 +-
 drivers/gpu/drm/i915/gt/uc/intel_guc.h        |   7 -
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 170 +-----------------
 3 files changed, 3 insertions(+), 190 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.c b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
index 2a343a977987..4545e90e3bf1 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.c
@@ -579,20 +579,8 @@ int intel_guc_reset_engine(struct intel_guc *guc,
  */
 int intel_guc_resume(struct intel_guc *guc)
 {
-	u32 action[] = {
-		INTEL_GUC_ACTION_EXIT_S_STATE,
-		GUC_POWER_D0,
-	};
-
-	/*
-	 * If GuC communication is enabled but submission is not supported,
-	 * we do not need to resume the GuC but we do need to enable the
-	 * GuC communication on resume (above).
-	 */
-	if (!intel_guc_submission_is_used(guc) || !intel_guc_is_ready(guc))
-		return 0;
-
-	return intel_guc_send(guc, action, ARRAY_SIZE(action));
+	/* XXX: to be implemented with submission interface rework */
+	return 0;
 }
 
 /**
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc.h b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
index e84ab67b317d..bc2ba7d0626c 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc.h
@@ -47,13 +47,6 @@ struct intel_guc {
 	struct i915_vma *stage_desc_pool;
 	void *stage_desc_pool_vaddr;
 
-	struct i915_vma *workqueue;
-	void *workqueue_vaddr;
-	spinlock_t wq_lock;
-
-	struct i915_vma *proc_desc;
-	void *proc_desc_vaddr;
-
 	/* Control params for fw initialization */
 	u32 params[GUC_CTL_MAX_DWORDS];
 
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 694ee424b4ee..d4f88d2379e9 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -67,58 +67,6 @@ static struct guc_stage_desc *__get_stage_desc(struct intel_guc *guc, u32 id)
 	return &base[id];
 }
 
-static int guc_workqueue_create(struct intel_guc *guc)
-{
-	return intel_guc_allocate_and_map_vma(guc, GUC_WQ_SIZE, &guc->workqueue,
-					      &guc->workqueue_vaddr);
-}
-
-static void guc_workqueue_destroy(struct intel_guc *guc)
-{
-	i915_vma_unpin_and_release(&guc->workqueue, I915_VMA_RELEASE_MAP);
-}
-
-/*
- * Initialise the process descriptor shared with the GuC firmware.
- */
-static int guc_proc_desc_create(struct intel_guc *guc)
-{
-	const u32 size = PAGE_ALIGN(sizeof(struct guc_process_desc));
-
-	return intel_guc_allocate_and_map_vma(guc, size, &guc->proc_desc,
-					      &guc->proc_desc_vaddr);
-}
-
-static void guc_proc_desc_destroy(struct intel_guc *guc)
-{
-	i915_vma_unpin_and_release(&guc->proc_desc, I915_VMA_RELEASE_MAP);
-}
-
-static void guc_proc_desc_init(struct intel_guc *guc)
-{
-	struct guc_process_desc *desc;
-
-	desc = memset(guc->proc_desc_vaddr, 0, sizeof(*desc));
-
-	/*
-	 * XXX: pDoorbell and WQVBaseAddress are pointers in process address
-	 * space for ring3 clients (set them as in mmap_ioctl) or kernel
-	 * space for kernel clients (map on demand instead? May make debug
-	 * easier to have it mapped).
-	 */
-	desc->wq_base_addr = 0;
-	desc->db_base_addr = 0;
-
-	desc->wq_size_bytes = GUC_WQ_SIZE;
-	desc->wq_status = WQ_STATUS_ACTIVE;
-	desc->priority = GUC_CLIENT_PRIORITY_KMD_NORMAL;
-}
-
-static void guc_proc_desc_fini(struct intel_guc *guc)
-{
-	memset(guc->proc_desc_vaddr, 0, sizeof(struct guc_process_desc));
-}
-
 static int guc_stage_desc_pool_create(struct intel_guc *guc)
 {
 	u32 size = PAGE_ALIGN(sizeof(struct guc_stage_desc) *
@@ -154,8 +102,6 @@ static void guc_stage_desc_init(struct intel_guc *guc)
 	desc->stage_id = 0;
 	desc->priority = GUC_CLIENT_PRIORITY_KMD_NORMAL;
 
-	desc->process_desc = intel_guc_ggtt_offset(guc, guc->proc_desc);
-	desc->wq_addr = intel_guc_ggtt_offset(guc, guc->workqueue);
 	desc->wq_size = GUC_WQ_SIZE;
 }
 
@@ -167,62 +113,9 @@ static void guc_stage_desc_fini(struct intel_guc *guc)
 	memset(desc, 0, sizeof(*desc));
 }
 
-/* Construct a Work Item and append it to the GuC's Work Queue */
-static void guc_wq_item_append(struct intel_guc *guc,
-			       u32 target_engine, u32 context_desc,
-			       u32 ring_tail, u32 fence_id)
-{
-	/* wqi_len is in DWords, and does not include the one-word header */
-	const size_t wqi_size = sizeof(struct guc_wq_item);
-	const u32 wqi_len = wqi_size / sizeof(u32) - 1;
-	struct guc_process_desc *desc = guc->proc_desc_vaddr;
-	struct guc_wq_item *wqi;
-	u32 wq_off;
-
-	lockdep_assert_held(&guc->wq_lock);
-
-	/* For now workqueue item is 4 DWs; workqueue buffer is 2 pages. So we
-	 * should not have the case where structure wqi is across page, neither
-	 * wrapped to the beginning. This simplifies the implementation below.
-	 *
-	 * XXX: if not the case, we need save data to a temp wqi and copy it to
-	 * workqueue buffer dw by dw.
-	 */
-	BUILD_BUG_ON(wqi_size != 16);
-
-	/* We expect the WQ to be active if we're appending items to it */
-	GEM_BUG_ON(desc->wq_status != WQ_STATUS_ACTIVE);
-
-	/* Free space is guaranteed. */
-	wq_off = READ_ONCE(desc->tail);
-	GEM_BUG_ON(CIRC_SPACE(wq_off, READ_ONCE(desc->head),
-			      GUC_WQ_SIZE) < wqi_size);
-	GEM_BUG_ON(wq_off & (wqi_size - 1));
-
-	wqi = guc->workqueue_vaddr + wq_off;
-
-	/* Now fill in the 4-word work queue item */
-	wqi->header = WQ_TYPE_INORDER |
-		      (wqi_len << WQ_LEN_SHIFT) |
-		      (target_engine << WQ_TARGET_SHIFT) |
-		      WQ_NO_WCFLUSH_WAIT;
-	wqi->context_desc = context_desc;
-	wqi->submit_element_info = ring_tail << WQ_RING_TAIL_SHIFT;
-	GEM_BUG_ON(ring_tail > WQ_RING_TAIL_MAX);
-	wqi->fence_id = fence_id;
-
-	/* Make the update visible to GuC */
-	WRITE_ONCE(desc->tail, (wq_off + wqi_size) & (GUC_WQ_SIZE - 1));
-}
-
 static void guc_add_request(struct intel_guc *guc, struct i915_request *rq)
 {
-	struct intel_engine_cs *engine = rq->engine;
-	u32 ctx_desc = rq->context->lrc.ccid;
-	u32 ring_tail = intel_ring_set_tail(rq->ring, rq->tail) / sizeof(u64);
-
-	guc_wq_item_append(guc, engine->guc_id, ctx_desc,
-			   ring_tail, rq->fence.seqno);
+	/* Leaving stub as this function will be used in future patches */
 }
 
 /*
@@ -245,16 +138,12 @@ static void guc_submit(struct intel_engine_cs *engine,
 {
 	struct intel_guc *guc = &engine->gt->uc.guc;
 
-	spin_lock(&guc->wq_lock);
-
 	do {
 		struct i915_request *rq = *out++;
 
 		flush_ggtt_writes(rq->ring->vma);
 		guc_add_request(guc, rq);
 	} while (out != end);
-
-	spin_unlock(&guc->wq_lock);
 }
 
 static inline int rq_prio(const struct i915_request *rq)
@@ -389,19 +278,6 @@ static void guc_reset_prepare(struct intel_engine_cs *engine)
 	__tasklet_disable_sync_once(&execlists->tasklet);
 }
 
-static void
-cancel_port_requests(struct intel_engine_execlists * const execlists)
-{
-	struct i915_request * const *port, *rq;
-
-	/* Note we are only using the inflight and not the pending queue */
-
-	for (port = execlists->active; (rq = *port); port++)
-		schedule_out(rq);
-	execlists->active =
-		memset(execlists->inflight, 0, sizeof(execlists->inflight));
-}
-
 static void guc_reset_state(struct intel_context *ce,
 			    struct intel_engine_cs *engine,
 			    u32 head,
@@ -432,8 +308,6 @@ static void guc_reset_rewind(struct intel_engine_cs *engine, bool stalled)
 
 	spin_lock_irqsave(&engine->active.lock, flags);
 
-	cancel_port_requests(execlists);
-
 	/* Push back any incomplete requests for replay after the reset. */
 	rq = execlists_unwind_incomplete_requests(execlists);
 	if (!rq)
@@ -474,9 +348,6 @@ static void guc_reset_cancel(struct intel_engine_cs *engine)
 	 */
 	spin_lock_irqsave(&engine->active.lock, flags);
 
-	/* Cancel the requests on the HW and clear the ELSP tracker. */
-	cancel_port_requests(execlists);
-
 	/* Mark all executing requests as skipped. */
 	list_for_each_entry(rq, &engine->active.requests, sched.link) {
 		i915_request_set_error_once(rq, -EIO);
@@ -519,12 +390,6 @@ static void guc_reset_finish(struct intel_engine_cs *engine)
 		     atomic_read(&execlists->tasklet.count));
 }
 
-/*
- * Everything below here is concerned with setup & teardown, and is
- * therefore not part of the somewhat time-critical batch-submission
- * path of guc_submit() above.
- */
-
 /*
  * Set up the memory resources to be shared with the GuC (via the GGTT)
  * at firmware loading time.
@@ -545,30 +410,12 @@ int intel_guc_submission_init(struct intel_guc *guc)
 	 */
 	GEM_BUG_ON(!guc->stage_desc_pool);
 
-	ret = guc_workqueue_create(guc);
-	if (ret)
-		goto err_pool;
-
-	ret = guc_proc_desc_create(guc);
-	if (ret)
-		goto err_workqueue;
-
-	spin_lock_init(&guc->wq_lock);
-
 	return 0;
-
-err_workqueue:
-	guc_workqueue_destroy(guc);
-err_pool:
-	guc_stage_desc_pool_destroy(guc);
-	return ret;
 }
 
 void intel_guc_submission_fini(struct intel_guc *guc)
 {
 	if (guc->stage_desc_pool) {
-		guc_proc_desc_destroy(guc);
-		guc_workqueue_destroy(guc);
 		guc_stage_desc_pool_destroy(guc);
 	}
 }
@@ -642,20 +489,6 @@ void intel_guc_submission_enable(struct intel_guc *guc)
 	struct intel_engine_cs *engine;
 	enum intel_engine_id id;
 
-	/*
-	 * We're using GuC work items for submitting work through GuC. Since
-	 * we're coalescing multiple requests from a single context into a
-	 * single work item prior to assigning it to execlist_port, we can
-	 * never have more work items than the total number of ports (for all
-	 * engines). The GuC firmware is controlling the HEAD of work queue,
-	 * and it is guaranteed that it will remove the work item from the
-	 * queue before our request is completed.
-	 */
-	BUILD_BUG_ON(ARRAY_SIZE(engine->execlists.inflight) *
-		     sizeof(struct guc_wq_item) *
-		     I915_NUM_ENGINES > GUC_WQ_SIZE);
-
-	guc_proc_desc_init(guc);
 	guc_stage_desc_init(guc);
 
 	/* Take over from manual control of ELSP (execlists) */
@@ -678,7 +511,6 @@ void intel_guc_submission_disable(struct intel_guc *guc)
 	guc_interrupts_release(gt);
 
 	guc_stage_desc_fini(guc);
-	guc_proc_desc_fini(guc);
 }
 
 static bool __guc_submission_selected(struct intel_guc *guc)
-- 
2.29.2

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[Intel-gfx] [PATCH v2 2/4] drm/i915/guc: do not dump execlists state with GuC submission

[Daniele Ceraolo Spurio]

GuC owns the execlists state and the context IDs used for submission, so
the status of the ports and the CSB entries are not something we control
or can decode from the i915 side, therefore we can avoid dumping it. A
follow-up patch will also stop setting the csb pointers when using GuC
submission.

GuC dumps all the required events in the GuC logs when verbosity is set
high enough.

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: John Harrison <John.C.Harrison@Intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gt/intel_engine_cs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index 1847d3c2ea99..f62303bf80b8 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -1470,7 +1470,9 @@ static void intel_engine_print_registers(struct intel_engine_cs *engine,
 		drm_printf(m, "\tIPEHR: 0x%08x\n", ENGINE_READ(engine, IPEHR));
 	}
 
-	if (HAS_EXECLISTS(dev_priv)) {
+	if (intel_engine_in_guc_submission_mode(engine)) {
+		/* nothing to print yet */
+	} else if (HAS_EXECLISTS(dev_priv)) {
 		struct i915_request * const *port, *rq;
 		const u32 *hws =
 			&engine->status_page.addr[I915_HWS_CSB_BUF0_INDEX];
-- 
2.29.2

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[Intel-gfx] [PATCH v2 3/4] drm/i915/guc: init engine directly in GuC submission mode

[Daniele Ceraolo Spurio]

Instead of starting the engine in execlists submission mode and then
switching to GuC, start directly in GuC submission mode. The initial
setup functions have been copied over from the execlists code
and simplified by removing the execlists submission-specific parts.

v2: remove unneeded unexpected starting state check (Chris)

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: John Harrison <john.c.harrison@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gt/intel_engine_cs.c     |   5 +-
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 224 +++++++++++++++++-
 .../gpu/drm/i915/gt/uc/intel_guc_submission.h |   1 +
 3 files changed, 219 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index f62303bf80b8..6b4483b72c3f 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -40,6 +40,7 @@
 #include "intel_lrc_reg.h"
 #include "intel_reset.h"
 #include "intel_ring.h"
+#include "uc/intel_guc_submission.h"
 
 /* Haswell does have the CXT_SIZE register however it does not appear to be
  * valid. Now, docs explain in dwords what is in the context object. The full
@@ -907,7 +908,9 @@ int intel_engines_init(struct intel_gt *gt)
 	enum intel_engine_id id;
 	int err;
 
-	if (HAS_EXECLISTS(gt->i915))
+	if (intel_uc_uses_guc_submission(&gt->uc))
+		setup = intel_guc_submission_setup;
+	else if (HAS_EXECLISTS(gt->i915))
 		setup = intel_execlists_submission_setup;
 	else
 		setup = intel_ring_submission_setup;
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 d4f88d2379e9..29d58e1c9694 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -6,12 +6,15 @@
 #include <linux/circ_buf.h>
 
 #include "gem/i915_gem_context.h"
+#include "gt/gen8_engine_cs.h"
+#include "gt/intel_breadcrumbs.h"
 #include "gt/intel_context.h"
 #include "gt/intel_engine_pm.h"
 #include "gt/intel_execlists_submission.h" /* XXX */
 #include "gt/intel_gt.h"
 #include "gt/intel_gt_pm.h"
 #include "gt/intel_lrc.h"
+#include "gt/intel_mocs.h"
 #include "gt/intel_ring.h"
 
 #include "intel_guc_submission.h"
@@ -55,6 +58,8 @@
  *
  */
 
+#define GUC_REQUEST_SIZE 64 /* bytes */
+
 static inline struct i915_priolist *to_priolist(struct rb_node *rb)
 {
 	return rb_entry(rb, struct i915_priolist, node);
@@ -446,6 +451,134 @@ static void guc_interrupts_release(struct intel_gt *gt)
 	intel_uncore_rmw(uncore, GEN11_VCS_VECS_INTR_ENABLE, 0, dmask);
 }
 
+static int guc_context_alloc(struct intel_context *ce)
+{
+	return lrc_alloc(ce, ce->engine);
+}
+
+static int guc_context_pre_pin(struct intel_context *ce,
+				     struct i915_gem_ww_ctx *ww,
+				     void **vaddr)
+{
+	return lrc_pre_pin(ce, ce->engine, ww, vaddr);
+}
+
+static int guc_context_pin(struct intel_context *ce, void *vaddr)
+{
+	return lrc_pin(ce, ce->engine, vaddr);
+}
+
+static const struct intel_context_ops guc_context_ops = {
+	.alloc = guc_context_alloc,
+
+	.pre_pin = guc_context_pre_pin,
+	.pin = guc_context_pin,
+	.unpin = lrc_unpin,
+	.post_unpin = lrc_post_unpin,
+
+	.enter = intel_context_enter_engine,
+	.exit = intel_context_exit_engine,
+
+	.reset = lrc_reset,
+	.destroy = lrc_destroy,
+};
+
+static int guc_request_alloc(struct i915_request *request)
+{
+	int ret;
+
+	GEM_BUG_ON(!intel_context_is_pinned(request->context));
+
+	/*
+	 * Flush enough space to reduce the likelihood of waiting after
+	 * we start building the request - in which case we will just
+	 * have to repeat work.
+	 */
+	request->reserved_space += GUC_REQUEST_SIZE;
+
+	/*
+	 * Note that after this point, we have committed to using
+	 * this request as it is being used to both track the
+	 * state of engine initialisation and liveness of the
+	 * golden renderstate above. Think twice before you try
+	 * to cancel/unwind this request now.
+	 */
+
+	/* Unconditionally invalidate GPU caches and TLBs. */
+	ret = request->engine->emit_flush(request, EMIT_INVALIDATE);
+	if (ret)
+		return ret;
+
+	request->reserved_space -= GUC_REQUEST_SIZE;
+	return 0;
+}
+
+static void sanitize_hwsp(struct intel_engine_cs *engine)
+{
+	struct intel_timeline *tl;
+
+	list_for_each_entry(tl, &engine->status_page.timelines, engine_link)
+		intel_timeline_reset_seqno(tl);
+}
+
+static void guc_sanitize(struct intel_engine_cs *engine)
+{
+	/*
+	 * Poison residual state on resume, in case the suspend didn't!
+	 *
+	 * We have to assume that across suspend/resume (or other loss
+	 * of control) that the contents of our pinned buffers has been
+	 * lost, replaced by garbage. Since this doesn't always happen,
+	 * let's poison such state so that we more quickly spot when
+	 * we falsely assume it has been preserved.
+	 */
+	if (IS_ENABLED(CONFIG_DRM_I915_DEBUG_GEM))
+		memset(engine->status_page.addr, POISON_INUSE, PAGE_SIZE);
+
+	/*
+	 * The kernel_context HWSP is stored in the status_page. As above,
+	 * that may be lost on resume/initialisation, and so we need to
+	 * reset the value in the HWSP.
+	 */
+	sanitize_hwsp(engine);
+
+	/* And scrub the dirty cachelines for the HWSP */
+	clflush_cache_range(engine->status_page.addr, PAGE_SIZE);
+}
+
+static void setup_hwsp(struct intel_engine_cs *engine)
+{
+	intel_engine_set_hwsp_writemask(engine, ~0u); /* HWSTAM */
+
+	ENGINE_WRITE_FW(engine,
+			RING_HWS_PGA,
+			i915_ggtt_offset(engine->status_page.vma));
+}
+
+static void start_engine(struct intel_engine_cs *engine)
+{
+	ENGINE_WRITE_FW(engine,
+			RING_MODE_GEN7,
+			_MASKED_BIT_ENABLE(GEN11_GFX_DISABLE_LEGACY_MODE));
+
+	ENGINE_WRITE_FW(engine, RING_MI_MODE, _MASKED_BIT_DISABLE(STOP_RING));
+	ENGINE_POSTING_READ(engine, RING_MI_MODE);
+}
+
+static int guc_resume(struct intel_engine_cs *engine)
+{
+	assert_forcewakes_active(engine->uncore, FORCEWAKE_ALL);
+
+	intel_mocs_init_engine(engine);
+
+	intel_breadcrumbs_reset(engine->breadcrumbs);
+
+	setup_hwsp(engine);
+	start_engine(engine);
+
+	return 0;
+}
+
 static void guc_set_default_submission(struct intel_engine_cs *engine)
 {
 	/*
@@ -483,23 +616,94 @@ static void guc_set_default_submission(struct intel_engine_cs *engine)
 	GEM_BUG_ON(engine->irq_enable || engine->irq_disable);
 }
 
-void intel_guc_submission_enable(struct intel_guc *guc)
+static void guc_release(struct intel_engine_cs *engine)
 {
-	struct intel_gt *gt = guc_to_gt(guc);
-	struct intel_engine_cs *engine;
-	enum intel_engine_id id;
+	engine->sanitize = NULL; /* no longer in control, nothing to sanitize */
 
-	guc_stage_desc_init(guc);
+	tasklet_kill(&engine->execlists.tasklet);
 
-	/* Take over from manual control of ELSP (execlists) */
-	guc_interrupts_capture(gt);
+	intel_engine_cleanup_common(engine);
+	lrc_fini_wa_ctx(engine);
+}
+
+static void guc_default_vfuncs(struct intel_engine_cs *engine)
+{
+	/* Default vfuncs which can be overriden by each engine. */
+
+	engine->resume = guc_resume;
+
+	engine->cops = &guc_context_ops;
+	engine->request_alloc = guc_request_alloc;
+
+	engine->emit_flush = gen8_emit_flush_xcs;
+	engine->emit_init_breadcrumb = gen8_emit_init_breadcrumb;
+	engine->emit_fini_breadcrumb = gen8_emit_fini_breadcrumb_xcs;
+	if (INTEL_GEN(engine->i915) >= 12) {
+		engine->emit_fini_breadcrumb = gen12_emit_fini_breadcrumb_xcs;
+		engine->emit_flush = gen12_emit_flush_xcs;
+	}
+	engine->set_default_submission = guc_set_default_submission;
+}
 
-	for_each_engine(engine, gt, id) {
-		engine->set_default_submission = guc_set_default_submission;
-		engine->set_default_submission(engine);
+static void rcs_submission_override(struct intel_engine_cs *engine)
+{
+	switch (INTEL_GEN(engine->i915)) {
+	case 12:
+		engine->emit_flush = gen12_emit_flush_rcs;
+		engine->emit_fini_breadcrumb = gen12_emit_fini_breadcrumb_rcs;
+		break;
+	case 11:
+		engine->emit_flush = gen11_emit_flush_rcs;
+		engine->emit_fini_breadcrumb = gen11_emit_fini_breadcrumb_rcs;
+		break;
+	default:
+		engine->emit_flush = gen8_emit_flush_rcs;
+		engine->emit_fini_breadcrumb = gen8_emit_fini_breadcrumb_rcs;
+		break;
 	}
 }
 
+static inline void guc_default_irqs(struct intel_engine_cs *engine)
+{
+	engine->irq_keep_mask = GT_RENDER_USER_INTERRUPT;
+}
+
+int intel_guc_submission_setup(struct intel_engine_cs *engine)
+{
+	struct drm_i915_private *i915 = engine->i915;
+
+	/*
+	 * The setup relies on several assumptions (e.g. irqs always enabled)
+	 * that are only valid on gen11+
+	 */
+	GEM_BUG_ON(INTEL_GEN(i915) < 11);
+
+	tasklet_init(&engine->execlists.tasklet,
+		     guc_submission_tasklet, (unsigned long)engine);
+
+	guc_default_vfuncs(engine);
+	guc_default_irqs(engine);
+
+	if (engine->class == RENDER_CLASS)
+		rcs_submission_override(engine);
+
+	lrc_init_wa_ctx(engine);
+
+	/* Finally, take ownership and responsibility for cleanup! */
+	engine->sanitize = guc_sanitize;
+	engine->release = guc_release;
+
+	return 0;
+}
+
+void intel_guc_submission_enable(struct intel_guc *guc)
+{
+	guc_stage_desc_init(guc);
+
+	/* Take over from manual control of ELSP (execlists) */
+	guc_interrupts_capture(guc_to_gt(guc));
+}
+
 void intel_guc_submission_disable(struct intel_guc *guc)
 {
 	struct intel_gt *gt = guc_to_gt(guc);
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
index 4cf9d3e50263..5f7b9e6347d0 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.h
@@ -19,6 +19,7 @@ void intel_guc_submission_disable(struct intel_guc *guc);
 void intel_guc_submission_fini(struct intel_guc *guc);
 int intel_guc_preempt_work_create(struct intel_guc *guc);
 void intel_guc_preempt_work_destroy(struct intel_guc *guc);
+int intel_guc_submission_setup(struct intel_engine_cs *engine);
 bool intel_engine_in_guc_submission_mode(const struct intel_engine_cs *engine);
 
 static inline bool intel_guc_submission_is_supported(struct intel_guc *guc)
-- 
2.29.2

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[Intel-gfx] [PATCH v2 4/4] drm/i915/guc: stop calling execlists_set_default_submission

[Daniele Ceraolo Spurio]

Initialize all required entries from guc_set_default_submission, instead
of calling the execlists function. The previously inherited setup has
been copied over from the execlist code and simplified by removing the
execlists submission-specific parts.

v2: move setting of relative_mmio flag to engine_setup_common (Chris)

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: John Harrison <john.c.harrison@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> #v1
---
 drivers/gpu/drm/i915/gt/intel_engine_cs.c     |  3 +
 .../drm/i915/gt/intel_execlists_submission.c  |  9 +--
 .../drm/i915/gt/intel_execlists_submission.h  |  2 -
 .../gpu/drm/i915/gt/uc/intel_guc_submission.c | 60 +++++++++++++------
 4 files changed, 48 insertions(+), 26 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index 6b4483b72c3f..f531207971d1 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -727,6 +727,9 @@ static int engine_setup_common(struct intel_engine_cs *engine)
 	intel_engine_init_whitelist(engine);
 	intel_engine_init_ctx_wa(engine);
 
+	if (INTEL_GEN(engine->i915) >= 12)
+		engine->flags |= I915_ENGINE_HAS_RELATIVE_MMIO;
+
 	return 0;
 
 err_status:
diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
index 10e9940cf3f5..d7d5a58990bb 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.c
@@ -3100,7 +3100,7 @@ static bool can_preempt(struct intel_engine_cs *engine)
 	return engine->class != RENDER_CLASS;
 }
 
-void intel_execlists_set_default_submission(struct intel_engine_cs *engine)
+static void execlists_set_default_submission(struct intel_engine_cs *engine)
 {
 	engine->submit_request = execlists_submit_request;
 	engine->schedule = i915_schedule;
@@ -3124,9 +3124,6 @@ void intel_execlists_set_default_submission(struct intel_engine_cs *engine)
 		}
 	}
 
-	if (INTEL_GEN(engine->i915) >= 12)
-		engine->flags |= I915_ENGINE_HAS_RELATIVE_MMIO;
-
 	if (intel_engine_has_preemption(engine))
 		engine->emit_bb_start = gen8_emit_bb_start;
 	else
@@ -3168,7 +3165,7 @@ logical_ring_default_vfuncs(struct intel_engine_cs *engine)
 		engine->emit_fini_breadcrumb = gen12_emit_fini_breadcrumb_xcs;
 		engine->emit_flush = gen12_emit_flush_xcs;
 	}
-	engine->set_default_submission = intel_execlists_set_default_submission;
+	engine->set_default_submission = execlists_set_default_submission;
 
 	if (INTEL_GEN(engine->i915) < 11) {
 		engine->irq_enable = gen8_logical_ring_enable_irq;
@@ -3924,7 +3921,7 @@ bool
 intel_engine_in_execlists_submission_mode(const struct intel_engine_cs *engine)
 {
 	return engine->set_default_submission ==
-	       intel_execlists_set_default_submission;
+	       execlists_set_default_submission;
 }
 
 #if IS_ENABLED(CONFIG_DRM_I915_SELFTEST)
diff --git a/drivers/gpu/drm/i915/gt/intel_execlists_submission.h b/drivers/gpu/drm/i915/gt/intel_execlists_submission.h
index 0c675bbff351..a8fd7adefd82 100644
--- a/drivers/gpu/drm/i915/gt/intel_execlists_submission.h
+++ b/drivers/gpu/drm/i915/gt/intel_execlists_submission.h
@@ -22,8 +22,6 @@ enum {
 
 int intel_execlists_submission_setup(struct intel_engine_cs *engine);
 
-void intel_execlists_set_default_submission(struct intel_engine_cs *engine);
-
 void intel_execlists_show_requests(struct intel_engine_cs *engine,
 				   struct drm_printer *m,
 				   void (*show_request)(struct drm_printer *m,
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 29d58e1c9694..0c2216b1ce46 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c
@@ -10,7 +10,6 @@
 #include "gt/intel_breadcrumbs.h"
 #include "gt/intel_context.h"
 #include "gt/intel_engine_pm.h"
-#include "gt/intel_execlists_submission.h" /* XXX */
 #include "gt/intel_gt.h"
 #include "gt/intel_gt_pm.h"
 #include "gt/intel_lrc.h"
@@ -513,6 +512,34 @@ static int guc_request_alloc(struct i915_request *request)
 	return 0;
 }
 
+static inline void queue_request(struct intel_engine_cs *engine,
+				 struct i915_request *rq,
+				 int prio)
+{
+	GEM_BUG_ON(!list_empty(&rq->sched.link));
+	list_add_tail(&rq->sched.link,
+		      i915_sched_lookup_priolist(engine, prio));
+	set_bit(I915_FENCE_FLAG_PQUEUE, &rq->fence.flags);
+}
+
+static void guc_submit_request(struct i915_request *rq)
+{
+	struct intel_engine_cs *engine = rq->engine;
+	unsigned long flags;
+
+	/* Will be called from irq-context when using foreign fences. */
+	spin_lock_irqsave(&engine->active.lock, flags);
+
+	queue_request(engine, rq, rq_prio(rq));
+
+	GEM_BUG_ON(RB_EMPTY_ROOT(&engine->execlists.queue.rb_root));
+	GEM_BUG_ON(list_empty(&rq->sched.link));
+
+	tasklet_hi_schedule(&engine->execlists.tasklet);
+
+	spin_unlock_irqrestore(&engine->active.lock, flags);
+}
+
 static void sanitize_hwsp(struct intel_engine_cs *engine)
 {
 	struct intel_timeline *tl;
@@ -581,31 +608,28 @@ static int guc_resume(struct intel_engine_cs *engine)
 
 static void guc_set_default_submission(struct intel_engine_cs *engine)
 {
-	/*
-	 * We inherit a bunch of functions from execlists that we'd like
-	 * to keep using:
-	 *
-	 *    engine->submit_request = execlists_submit_request;
-	 *    engine->cancel_requests = execlists_cancel_requests;
-	 *    engine->schedule = execlists_schedule;
-	 *
-	 * But we need to override the actual submission backend in order
-	 * to talk to the GuC.
-	 */
-	intel_execlists_set_default_submission(engine);
-
+	engine->submit_request = guc_submit_request;
+	engine->schedule = i915_schedule;
 	engine->execlists.tasklet.func = guc_submission_tasklet;
 
-	/* do not use execlists park/unpark */
-	engine->park = engine->unpark = NULL;
-
 	engine->reset.prepare = guc_reset_prepare;
 	engine->reset.rewind = guc_reset_rewind;
 	engine->reset.cancel = guc_reset_cancel;
 	engine->reset.finish = guc_reset_finish;
 
-	engine->flags &= ~I915_ENGINE_SUPPORTS_STATS;
 	engine->flags |= I915_ENGINE_NEEDS_BREADCRUMB_TASKLET;
+	engine->flags |= I915_ENGINE_HAS_PREEMPTION;
+
+	/*
+	 * TODO: GuC supports timeslicing and semaphores as well, but they're
+	 * handled by the firmware so some minor tweaks are required before
+	 * enabling.
+	 *
+	 * engine->flags |= I915_ENGINE_HAS_TIMESLICES;
+	 * engine->flags |= I915_ENGINE_HAS_SEMAPHORES;
+	 */
+
+	engine->emit_bb_start = gen8_emit_bb_start;
 
 	/*
 	 * For the breadcrumb irq to work we need the interrupts to stay
-- 
2.29.2

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[Intel-gfx] ✗ Fi.CI.BUILD: failure for series starting with [v2,1/4] drm/i915/guc: Delete GuC code unused in future patches

[Patchwork]

== Series Details ==

Series: series starting with [v2,1/4] drm/i915/guc: Delete GuC code unused in future patches
URL   : https://patchwork.freedesktop.org/series/85778/
State : failure

== Summary ==

Patch is empty.
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".


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