drm/i915: Move request->ctx aside

In the next patch, we want to store the intel_context pointer inside
i915_request, as it is frequently access via a convoluted dance when
submitting the request to hw. Having two context pointers inside
i915_request leads to confusion so first rename the existing
i915_gem_context pointer to i915_request.gem_context.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180517212633.24934-1-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/gvt/scheduler.c

@@ -205,7 +205,7 @@ static int populate_shadow_context(struct intel_vgpu_workload *workload)
 
 static inline bool is_gvt_request(struct i915_request *req)
 {
-	return i915_gem_context_force_single_submission(req->ctx);
+	return i915_gem_context_force_single_submission(req->gem_context);
 }
 
 static void save_ring_hw_state(struct intel_vgpu *vgpu, int ring_id)
@@ -305,7 +305,7 @@ static int copy_workload_to_ring_buffer(struct intel_vgpu_workload *workload)
 	struct i915_request *req = workload->req;
 
 	if (IS_KABYLAKE(req->i915) &&
-	    is_inhibit_context(req->ctx, req->engine->id))
+	    is_inhibit_context(req->gem_context, req->engine->id))
 		intel_vgpu_restore_inhibit_context(vgpu, req);
 
 	/* allocate shadow ring buffer */

drivers/gpu/drm/i915/i915_debugfs.c

@@ -542,8 +542,8 @@ static int i915_gem_object_info(struct seq_file *m, void *data)
 						   struct i915_request,
 						   client_link);
 		rcu_read_lock();
-		task = pid_task(request && request->ctx->pid ?
-				request->ctx->pid : file->pid,
+		task = pid_task(request && request->gem_context->pid ?
+				request->gem_context->pid : file->pid,
 				PIDTYPE_PID);
 		print_file_stats(m, task ? task->comm : "<unknown>", stats);
 		rcu_read_unlock();

drivers/gpu/drm/i915/i915_gem.c

@@ -3067,7 +3067,7 @@ static void skip_request(struct i915_request *request)
 static void engine_skip_context(struct i915_request *request)
 {
 	struct intel_engine_cs *engine = request->engine;
-	struct i915_gem_context *hung_ctx = request->ctx;
+	struct i915_gem_context *hung_ctx = request->gem_context;
 	struct i915_timeline *timeline = request->timeline;
 	unsigned long flags;
 
@@ -3077,7 +3077,7 @@ static void engine_skip_context(struct i915_request *request)
 	spin_lock_nested(&timeline->lock, SINGLE_DEPTH_NESTING);
 
 	list_for_each_entry_continue(request, &engine->timeline.requests, link)
-		if (request->ctx == hung_ctx)
+		if (request->gem_context == hung_ctx)
 			skip_request(request);
 
 	list_for_each_entry(request, &timeline->requests, link)
@@ -3123,11 +3123,11 @@ i915_gem_reset_request(struct intel_engine_cs *engine,
 	}
 
 	if (stalled) {
-		i915_gem_context_mark_guilty(request->ctx);
+		i915_gem_context_mark_guilty(request->gem_context);
 		skip_request(request);
 
 		/* If this context is now banned, skip all pending requests. */
-		if (i915_gem_context_is_banned(request->ctx))
+		if (i915_gem_context_is_banned(request->gem_context))
 			engine_skip_context(request);
 	} else {
 		/*
@@ -3137,7 +3137,7 @@ i915_gem_reset_request(struct intel_engine_cs *engine,
 		 */
 		request = i915_gem_find_active_request(engine);
 		if (request) {
-			i915_gem_context_mark_innocent(request->ctx);
+			i915_gem_context_mark_innocent(request->gem_context);
 			dma_fence_set_error(&request->fence, -EAGAIN);
 
 			/* Rewind the engine to replay the incomplete rq */

drivers/gpu/drm/i915/i915_gpu_error.c

@@ -1287,17 +1287,19 @@ static void error_record_engine_registers(struct i915_gpu_state *error,
 static void record_request(struct i915_request *request,
 			   struct drm_i915_error_request *erq)
 {
-	erq->context = request->ctx->hw_id;
+	struct i915_gem_context *ctx = request->gem_context;
+
+	erq->context = ctx->hw_id;
 	erq->sched_attr = request->sched.attr;
-	erq->ban_score = atomic_read(&request->ctx->ban_score);
+	erq->ban_score = atomic_read(&ctx->ban_score);
 	erq->seqno = request->global_seqno;
 	erq->jiffies = request->emitted_jiffies;
 	erq->start = i915_ggtt_offset(request->ring->vma);
 	erq->head = request->head;
 	erq->tail = request->tail;
 
 	rcu_read_lock();
-	erq->pid = request->ctx->pid ? pid_nr(request->ctx->pid) : 0;
+	erq->pid = ctx->pid ? pid_nr(ctx->pid) : 0;
 	rcu_read_unlock();
 }
 
@@ -1461,12 +1463,12 @@ static void gem_record_rings(struct i915_gpu_state *error)
 
 		request = i915_gem_find_active_request(engine);
 		if (request) {
+			struct i915_gem_context *ctx = request->gem_context;
 			struct intel_ring *ring;
 
-			ee->vm = request->ctx->ppgtt ?
-				&request->ctx->ppgtt->base : &ggtt->base;
+			ee->vm = ctx->ppgtt ? &ctx->ppgtt->base : &ggtt->base;
 
-			record_context(&ee->context, request->ctx);
+			record_context(&ee->context, ctx);
 
 			/* We need to copy these to an anonymous buffer
 			 * as the simplest method to avoid being overwritten
@@ -1483,11 +1485,11 @@ static void gem_record_rings(struct i915_gpu_state *error)
 
 			ee->ctx =
 				i915_error_object_create(i915,
-							 to_intel_context(request->ctx,
+							 to_intel_context(ctx,
 									  engine)->state);
 
 			error->simulated |=
-				i915_gem_context_no_error_capture(request->ctx);
+				i915_gem_context_no_error_capture(ctx);
 
 			ee->rq_head = request->head;
 			ee->rq_post = request->postfix;

drivers/gpu/drm/i915/i915_request.c

@@ -384,7 +384,7 @@ static void __retire_engine_request(struct intel_engine_cs *engine,
 	 */
 	if (engine->last_retired_context)
 		intel_context_unpin(engine->last_retired_context, engine);
-	engine->last_retired_context = rq->ctx;
+	engine->last_retired_context = rq->gem_context;
 }
 
 static void __retire_engine_upto(struct intel_engine_cs *engine,
@@ -455,8 +455,8 @@ static void i915_request_retire(struct i915_request *request)
 	i915_request_remove_from_client(request);
 
 	/* Retirement decays the ban score as it is a sign of ctx progress */
-	atomic_dec_if_positive(&request->ctx->ban_score);
-	intel_context_unpin(request->ctx, request->engine);
+	atomic_dec_if_positive(&request->gem_context->ban_score);
+	intel_context_unpin(request->gem_context, request->engine);
 
 	__retire_engine_upto(request->engine, request);
 
@@ -760,7 +760,7 @@ i915_request_alloc(struct intel_engine_cs *engine, struct i915_gem_context *ctx)
 	INIT_LIST_HEAD(&rq->active_list);
 	rq->i915 = i915;
 	rq->engine = engine;
-	rq->ctx = ctx;
+	rq->gem_context = ctx;
 	rq->ring = ring;
 	rq->timeline = ring->timeline;
 	GEM_BUG_ON(rq->timeline == &engine->timeline);
@@ -814,7 +814,7 @@ i915_request_alloc(struct intel_engine_cs *engine, struct i915_gem_context *ctx)
 		goto err_unwind;
 
 	/* Keep a second pin for the dual retirement along engine and ring */
-	__intel_context_pin(rq->ctx, engine);
+	__intel_context_pin(rq->gem_context, engine);
 
 	/* Check that we didn't interrupt ourselves with a new request */
 	GEM_BUG_ON(rq->timeline->seqno != rq->fence.seqno);
@@ -1113,7 +1113,7 @@ void __i915_request_add(struct i915_request *request, bool flush_caches)
 	local_bh_disable();
 	rcu_read_lock(); /* RCU serialisation for set-wedged protection */
 	if (engine->schedule)
-		engine->schedule(request, &request->ctx->sched);
+		engine->schedule(request, &request->gem_context->sched);
 	rcu_read_unlock();
 	i915_sw_fence_commit(&request->submit);
 	local_bh_enable(); /* Kick the execlists tasklet if just scheduled */

drivers/gpu/drm/i915/i915_request.h

@@ -93,7 +93,7 @@ struct i915_request {
 	 * i915_request_free() will then decrement the refcount on the
 	 * context.
 	 */
-	struct i915_gem_context *ctx;
+	struct i915_gem_context *gem_context;
 	struct intel_engine_cs *engine;
 	struct intel_ring *ring;
 	struct i915_timeline *timeline;

drivers/gpu/drm/i915/i915_trace.h

@@ -624,7 +624,7 @@ TRACE_EVENT(i915_request_queue,
 
 	    TP_fast_assign(
 			   __entry->dev = rq->i915->drm.primary->index;
-			   __entry->hw_id = rq->ctx->hw_id;
+			   __entry->hw_id = rq->gem_context->hw_id;
 			   __entry->ring = rq->engine->id;
 			   __entry->ctx = rq->fence.context;
 			   __entry->seqno = rq->fence.seqno;
@@ -651,7 +651,7 @@ DECLARE_EVENT_CLASS(i915_request,
 
 	    TP_fast_assign(
 			   __entry->dev = rq->i915->drm.primary->index;
-			   __entry->hw_id = rq->ctx->hw_id;
+			   __entry->hw_id = rq->gem_context->hw_id;
 			   __entry->ring = rq->engine->id;
 			   __entry->ctx = rq->fence.context;
 			   __entry->seqno = rq->fence.seqno;
@@ -696,7 +696,7 @@ TRACE_EVENT(i915_request_in,
 
 	    TP_fast_assign(
 			   __entry->dev = rq->i915->drm.primary->index;
-			   __entry->hw_id = rq->ctx->hw_id;
+			   __entry->hw_id = rq->gem_context->hw_id;
 			   __entry->ring = rq->engine->id;
 			   __entry->ctx = rq->fence.context;
 			   __entry->seqno = rq->fence.seqno;
@@ -727,7 +727,7 @@ TRACE_EVENT(i915_request_out,
 
 	    TP_fast_assign(
 			   __entry->dev = rq->i915->drm.primary->index;
-			   __entry->hw_id = rq->ctx->hw_id;
+			   __entry->hw_id = rq->gem_context->hw_id;
 			   __entry->ring = rq->engine->id;
 			   __entry->ctx = rq->fence.context;
 			   __entry->seqno = rq->fence.seqno;
@@ -815,7 +815,7 @@ TRACE_EVENT(i915_request_wait_begin,
 	     */
 	    TP_fast_assign(
 			   __entry->dev = rq->i915->drm.primary->index;
-			   __entry->hw_id = rq->ctx->hw_id;
+			   __entry->hw_id = rq->gem_context->hw_id;
 			   __entry->ring = rq->engine->id;
 			   __entry->ctx = rq->fence.context;
 			   __entry->seqno = rq->fence.seqno;

drivers/gpu/drm/i915/intel_engine_cs.c

@@ -1020,7 +1020,7 @@ bool intel_engine_has_kernel_context(const struct intel_engine_cs *engine)
 	 */
 	rq = __i915_gem_active_peek(&engine->timeline.last_request);
 	if (rq)
-		return rq->ctx == kernel_context;
+		return rq->gem_context == kernel_context;
 	else
 		return engine->last_retired_context == kernel_context;
 }

drivers/gpu/drm/i915/intel_guc_submission.c

@@ -513,8 +513,9 @@ static void guc_add_request(struct intel_guc *guc, struct i915_request *rq)
 {
 	struct intel_guc_client *client = guc->execbuf_client;
 	struct intel_engine_cs *engine = rq->engine;
-	u32 ctx_desc = lower_32_bits(intel_lr_context_descriptor(rq->ctx,
-								 engine));
+	u32 ctx_desc =
+		lower_32_bits(intel_lr_context_descriptor(rq->gem_context,
+							  engine));
 	u32 ring_tail = intel_ring_set_tail(rq->ring, rq->tail) / sizeof(u64);
 
 	spin_lock(&client->wq_lock);
@@ -725,7 +726,7 @@ static bool __guc_dequeue(struct intel_engine_cs *engine)
 		struct i915_request *rq, *rn;
 
 		list_for_each_entry_safe(rq, rn, &p->requests, sched.link) {
-			if (last && rq->ctx != last->ctx) {
+			if (last && rq->gem_context != last->gem_context) {
 				if (port == last_port) {
 					__list_del_many(&p->requests,
 							&rq->sched.link);

drivers/gpu/drm/i915/intel_lrc.c

@@ -418,9 +418,10 @@ execlists_update_context_pdps(struct i915_hw_ppgtt *ppgtt, u32 *reg_state)
 
 static u64 execlists_update_context(struct i915_request *rq)
 {
-	struct intel_context *ce = to_intel_context(rq->ctx, rq->engine);
+	struct intel_context *ce =
+		to_intel_context(rq->gem_context, rq->engine);
 	struct i915_hw_ppgtt *ppgtt =
-		rq->ctx->ppgtt ?: rq->i915->mm.aliasing_ppgtt;
+		rq->gem_context->ppgtt ?: rq->i915->mm.aliasing_ppgtt;
 	u32 *reg_state = ce->lrc_reg_state;
 
 	reg_state[CTX_RING_TAIL+1] = intel_ring_set_tail(rq->ring, rq->tail);
@@ -679,7 +680,8 @@ static bool __execlists_dequeue(struct intel_engine_cs *engine)
 			 * second request, and so we never need to tell the
 			 * hardware about the first.
 			 */
-			if (last && !can_merge_ctx(rq->ctx, last->ctx)) {
+			if (last && !can_merge_ctx(rq->gem_context,
+						   last->gem_context)) {
 				/*
 				 * If we are on the second port and cannot
 				 * combine this request with the last, then we
@@ -698,14 +700,14 @@ static bool __execlists_dequeue(struct intel_engine_cs *engine)
 				 * the same context (even though a different
 				 * request) to the second port.
 				 */
-				if (ctx_single_port_submission(last->ctx) ||
-				    ctx_single_port_submission(rq->ctx)) {
+				if (ctx_single_port_submission(last->gem_context) ||
+				    ctx_single_port_submission(rq->gem_context)) {
 					__list_del_many(&p->requests,
 							&rq->sched.link);
 					goto done;
 				}
 
-				GEM_BUG_ON(last->ctx == rq->ctx);
+				GEM_BUG_ON(last->gem_context == rq->gem_context);
 
 				if (submit)
 					port_assign(port, last);
@@ -1437,7 +1439,7 @@ static void execlists_context_unpin(struct intel_engine_cs *engine,
 static int execlists_request_alloc(struct i915_request *request)
 {
 	struct intel_context *ce =
-		to_intel_context(request->ctx, request->engine);
+		to_intel_context(request->gem_context, request->engine);
 	int ret;
 
 	GEM_BUG_ON(!ce->pin_count);
@@ -1954,7 +1956,7 @@ static void execlists_reset(struct intel_engine_cs *engine,
 	 * future request will be after userspace has had the opportunity
 	 * to recreate its own state.
 	 */
-	regs = to_intel_context(request->ctx, engine)->lrc_reg_state;
+	regs = to_intel_context(request->gem_context, engine)->lrc_reg_state;
 	if (engine->default_state) {
 		void *defaults;
 
@@ -1967,7 +1969,8 @@ static void execlists_reset(struct intel_engine_cs *engine,
 			i915_gem_object_unpin_map(engine->default_state);
 		}
 	}
-	execlists_init_reg_state(regs, request->ctx, engine, request->ring);
+	execlists_init_reg_state(regs,
+				 request->gem_context, engine, request->ring);
 
 	/* Move the RING_HEAD onto the breadcrumb, past the hanging batch */
 	regs[CTX_RING_BUFFER_START + 1] = i915_ggtt_offset(request->ring->vma);
@@ -1989,7 +1992,7 @@ static void execlists_reset_finish(struct intel_engine_cs *engine)
 
 static int intel_logical_ring_emit_pdps(struct i915_request *rq)
 {
-	struct i915_hw_ppgtt *ppgtt = rq->ctx->ppgtt;
+	struct i915_hw_ppgtt *ppgtt = rq->gem_context->ppgtt;
 	struct intel_engine_cs *engine = rq->engine;
 	const int num_lri_cmds = GEN8_3LVL_PDPES * 2;
 	u32 *cs;
@@ -2028,15 +2031,15 @@ static int gen8_emit_bb_start(struct i915_request *rq,
 	 * it is unsafe in case of lite-restore (because the ctx is
 	 * not idle). PML4 is allocated during ppgtt init so this is
 	 * not needed in 48-bit.*/
-	if (rq->ctx->ppgtt &&
-	    (intel_engine_flag(rq->engine) & rq->ctx->ppgtt->pd_dirty_rings) &&
-	    !i915_vm_is_48bit(&rq->ctx->ppgtt->base) &&
+	if (rq->gem_context->ppgtt &&
+	    (intel_engine_flag(rq->engine) & rq->gem_context->ppgtt->pd_dirty_rings) &&
+	    !i915_vm_is_48bit(&rq->gem_context->ppgtt->base) &&
 	    !intel_vgpu_active(rq->i915)) {
 		ret = intel_logical_ring_emit_pdps(rq);
 		if (ret)
 			return ret;
 
-		rq->ctx->ppgtt->pd_dirty_rings &= ~intel_engine_flag(rq->engine);
+		rq->gem_context->ppgtt->pd_dirty_rings &= ~intel_engine_flag(rq->engine);
 	}
 
 	cs = intel_ring_begin(rq, 6);

drivers/gpu/drm/i915/intel_ringbuffer.c

@@ -571,8 +571,8 @@ static void reset_ring(struct intel_engine_cs *engine,
 	 */
 	if (request) {
 		struct drm_i915_private *dev_priv = request->i915;
-		struct intel_context *ce = to_intel_context(request->ctx,
-							    engine);
+		struct intel_context *ce =
+			to_intel_context(request->gem_context, engine);
 		struct i915_hw_ppgtt *ppgtt;
 
 		if (ce->state) {
@@ -584,7 +584,7 @@ static void reset_ring(struct intel_engine_cs *engine,
 				   CCID_EN);
 		}
 
-		ppgtt = request->ctx->ppgtt ?: engine->i915->mm.aliasing_ppgtt;
+		ppgtt = request->gem_context->ppgtt ?: engine->i915->mm.aliasing_ppgtt;
 		if (ppgtt) {
 			u32 pd_offset = ppgtt->pd.base.ggtt_offset << 10;
 
@@ -1458,7 +1458,7 @@ static inline int mi_set_context(struct i915_request *rq, u32 flags)
 
 	*cs++ = MI_NOOP;
 	*cs++ = MI_SET_CONTEXT;
-	*cs++ = i915_ggtt_offset(to_intel_context(rq->ctx, engine)->state) | flags;
+	*cs++ = i915_ggtt_offset(to_intel_context(rq->gem_context, engine)->state) | flags;
 	/*
 	 * w/a: MI_SET_CONTEXT must always be followed by MI_NOOP
 	 * WaMiSetContext_Hang:snb,ivb,vlv
@@ -1526,7 +1526,7 @@ static int remap_l3(struct i915_request *rq, int slice)
 static int switch_context(struct i915_request *rq)
 {
 	struct intel_engine_cs *engine = rq->engine;
-	struct i915_gem_context *to_ctx = rq->ctx;
+	struct i915_gem_context *to_ctx = rq->gem_context;
 	struct i915_hw_ppgtt *to_mm =
 		to_ctx->ppgtt ?: rq->i915->mm.aliasing_ppgtt;
 	struct i915_gem_context *from_ctx = engine->legacy_active_context;
@@ -1597,7 +1597,7 @@ static int ring_request_alloc(struct i915_request *request)
 {
 	int ret;
 
-	GEM_BUG_ON(!to_intel_context(request->ctx, request->engine)->pin_count);
+	GEM_BUG_ON(!to_intel_context(request->gem_context, request->engine)->pin_count);
 
 	/* Flush enough space to reduce the likelihood of waiting after
 	 * we start building the request - in which case we will just