Revert "gpu: nvgpu: allocate only active runlists"

This reverts commit 45fa0441f7.

Bug 2522374

Change-Id: Icb80b7a31c7588a269850a3768ab0238dbec67b1
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2030292
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com>
Reviewed-by: svc-misra-checker <svc-misra-checker@nvidia.com>
Reviewed-by: Hoang Pham <hopham@nvidia.com>

drivers/gpu/nvgpu/common/fifo/runlist.c

@@ -26,32 +26,6 @@
 #include <nvgpu/runlist.h>
 #include <nvgpu/bug.h>
 
-void nvgpu_fifo_lock_active_runlists(struct gk20a *g)
-{
-	struct fifo_gk20a *f = &g->fifo;
-	struct fifo_runlist_info_gk20a *runlist;
-	u32 i;
-
-	nvgpu_log_info(g, "acquire runlist_lock for active runlists");
-	for (i = 0; i < g->fifo.num_runlists; i++) {
-		runlist = &f->active_runlist_info[i];
-		nvgpu_mutex_acquire(&runlist->runlist_lock);
-	}
-}
-
-void nvgpu_fifo_unlock_active_runlists(struct gk20a *g)
-{
-	struct fifo_gk20a *f = &g->fifo;
-	struct fifo_runlist_info_gk20a *runlist;
-	u32 i;
-
-	nvgpu_log_info(g, "release runlist_lock for active runlists");
-	for (i = 0; i < g->fifo.num_runlists; i++) {
-		runlist = &f->active_runlist_info[i];
-		nvgpu_mutex_release(&runlist->runlist_lock);
-	}
-}
-
 static u32 nvgpu_runlist_append_tsg(struct gk20a *g,
 		struct fifo_runlist_info_gk20a *runlist,
 		u32 **runlist_entry,
@@ -606,7 +580,8 @@ void gk20a_fifo_set_runlist_state(struct gk20a *g, u32 runlists_mask,
 
 void gk20a_fifo_delete_runlist(struct fifo_gk20a *f)
 {
-	u32 i, j;
+	u32 i;
+	u32 runlist_id;
 	struct fifo_runlist_info_gk20a *runlist;
 	struct gk20a *g = NULL;
 
@@ -616,10 +591,10 @@ void gk20a_fifo_delete_runlist(struct fifo_gk20a *f)
 
 	g = f->g;
 
-	for (i = 0; i < f->num_runlists; i++) {
-		runlist = &f->active_runlist_info[i];
-		for (j = 0; j < MAX_RUNLIST_BUFFERS; j++) {
-			nvgpu_dma_free(g, &runlist->mem[j]);
+	for (runlist_id = 0; runlist_id < f->max_runlists; runlist_id++) {
+		runlist = f->runlist_info[runlist_id];
+		for (i = 0; i < MAX_RUNLIST_BUFFERS; i++) {
+			nvgpu_dma_free(g, &runlist->mem[i]);
 		}
 
 		nvgpu_kfree(g, runlist->active_channels);
@@ -629,11 +604,10 @@ void gk20a_fifo_delete_runlist(struct fifo_gk20a *f)
 		runlist->active_tsgs = NULL;
 
 		nvgpu_mutex_destroy(&runlist->runlist_lock);
-		f->runlist_info[runlist->runlist_id] = NULL;
 		nvgpu_kfree(g, runlist);
+		f->runlist_info[runlist_id] = NULL;
 	}
 
-	nvgpu_kfree(g, f->active_runlist_info);
 	nvgpu_kfree(g, f->runlist_info);
 	f->runlist_info = NULL;
 	f->max_runlists = 0;
@@ -643,8 +617,7 @@ int nvgpu_init_runlist(struct gk20a *g, struct fifo_gk20a *f)
 {
 	struct fifo_runlist_info_gk20a *runlist;
 	unsigned int runlist_id;
-	u32 i, j;
-	u32 num_runlists = 0U;
+	u32 i;
 	size_t runlist_size;
 	int err = 0;
 
@@ -652,39 +625,18 @@ int nvgpu_init_runlist(struct gk20a *g, struct fifo_gk20a *f)
 
 	f->max_runlists = g->ops.runlist.count_max();
 	f->runlist_info = nvgpu_kzalloc(g,
-			sizeof(*f->runlist_info) * f->max_runlists);
+					sizeof(struct fifo_runlist_info_gk20a *) *
+					f->max_runlists);
 	if (f->runlist_info == NULL) {
 		goto clean_up_runlist;
 	}
 
 	for (runlist_id = 0; runlist_id < f->max_runlists; runlist_id++) {
-		if (gk20a_fifo_is_valid_runlist_id(g, runlist_id)) {
-			num_runlists++;
+		runlist = nvgpu_kzalloc(g, sizeof(*runlist));
+		if (runlist == NULL) {
+			goto clean_up_runlist;
 		}
-	}
-	f->num_runlists = num_runlists;
-
-	f->active_runlist_info = nvgpu_kzalloc(g,
-			 sizeof(*f->active_runlist_info) * num_runlists);
-	if (f->active_runlist_info == NULL) {
-		goto clean_up_runlist;
-	}
-	nvgpu_log_info(g, "num_runlists=%u", num_runlists);
-
-	/* In most case we want to loop through active runlists only. Here
-	 * we need to loop through all possible runlists, to build the mapping
-	 * between runlist_info[runlist_id] and active_runlist_info[i].
-	 */
-	i = 0U;
-	for (runlist_id = 0; runlist_id < f->max_runlists; runlist_id++) {
-		if (!gk20a_fifo_is_valid_runlist_id(g, runlist_id)) {
-			/* skip inactive runlist */
-			continue;
-		}
-		runlist = &f->active_runlist_info[i];
-		runlist->runlist_id = runlist_id;
 		f->runlist_info[runlist_id] = runlist;
-		i++;
 
 		runlist->active_channels =
 			nvgpu_kzalloc(g, DIV_ROUND_UP(f->num_channels,
@@ -706,15 +658,19 @@ int nvgpu_init_runlist(struct gk20a *g, struct fifo_gk20a *f)
 				"runlist_entries %d runlist size %zu",
 				f->num_runlist_entries, runlist_size);
 
-		for (j = 0; j < MAX_RUNLIST_BUFFERS; j++) {
-			err = nvgpu_dma_alloc_flags_sys(g,
-					g->is_virtual ?
-					  0 : NVGPU_DMA_PHYSICALLY_ADDRESSED,
-					runlist_size,
-					&runlist->mem[j]);
-			if (err != 0) {
-				nvgpu_err(g, "memory allocation failed");
-				goto clean_up_runlist;
+		/* skip buffer allocation for unused runlists */
+		if (gk20a_fifo_is_valid_runlist_id(g, runlist_id)) {
+			unsigned long flags = g->is_virtual ? 0 :
+						NVGPU_DMA_PHYSICALLY_ADDRESSED;
+			for (i = 0; i < MAX_RUNLIST_BUFFERS; i++) {
+				err = nvgpu_dma_alloc_flags_sys(g,
+						flags,
+						runlist_size,
+						&runlist->mem[i]);
+				if (err != 0) {
+					nvgpu_err(g, "memory allocation failed");
+					goto clean_up_runlist;
+				}
 			}
 		}
 

drivers/gpu/nvgpu/common/fifo/tsg.c

@@ -93,8 +93,8 @@ static bool gk20a_is_channel_active(struct gk20a *g, struct channel_gk20a *ch)
 	struct fifo_runlist_info_gk20a *runlist;
 	unsigned int i;
 
-	for (i = 0; i < f->num_runlists; ++i) {
-		runlist = &f->active_runlist_info[i];
+	for (i = 0; i < f->max_runlists; ++i) {
+		runlist = f->runlist_info[i];
 		if (test_bit((int)ch->chid, runlist->active_channels)) {
 			return true;
 		}

drivers/gpu/nvgpu/gk20a/fifo_gk20a.c

@@ -388,33 +388,33 @@ static int nvgpu_init_runlist_enginfo(struct gk20a *g, struct fifo_gk20a *f)
 {
 	struct fifo_runlist_info_gk20a *runlist;
 	struct fifo_engine_info_gk20a *engine_info;
-	u32 i, active_engine_id, pbdma_id, engine_id;
+	unsigned int runlist_id;
+	u32 active_engine_id, pbdma_id, engine_id;
 
 	nvgpu_log_fn(g, " ");
 
-	for (i = 0; i < f->num_runlists; i++) {
-		runlist = &f->active_runlist_info[i];
+	for (runlist_id = 0; runlist_id < f->max_runlists; runlist_id++) {
+		runlist = f->runlist_info[runlist_id];
 
 		for (pbdma_id = 0; pbdma_id < f->num_pbdma; pbdma_id++) {
-			if ((f->pbdma_map[pbdma_id] &
-					BIT32(runlist->runlist_id)) != 0U) {
+			if ((f->pbdma_map[pbdma_id] & BIT32(runlist_id)) != 0U) {
 				runlist->pbdma_bitmask |= BIT32(pbdma_id);
 			}
 		}
 		nvgpu_log(g, gpu_dbg_info, "runlist %d : pbdma bitmask 0x%x",
-				 runlist->runlist_id, runlist->pbdma_bitmask);
+				 runlist_id, runlist->pbdma_bitmask);
 
 		for (engine_id = 0; engine_id < f->num_engines; ++engine_id) {
 			active_engine_id = f->active_engines_list[engine_id];
 			engine_info = &f->engine_info[active_engine_id];
 
 			if ((engine_info != NULL) &&
-			    (engine_info->runlist_id == runlist->runlist_id)) {
+			    (engine_info->runlist_id == runlist_id)) {
 				runlist->eng_bitmask |= BIT(active_engine_id);
 			}
 		}
 		nvgpu_log(g, gpu_dbg_info, "runlist %d : act eng bitmask 0x%x",
-				 runlist->runlist_id, runlist->eng_bitmask);
+				 runlist_id, runlist->eng_bitmask);
 	}
 
 	nvgpu_log_fn(g, "done");
@@ -1340,17 +1340,23 @@ static bool gk20a_fifo_handle_mmu_fault(
 	u32 hw_id, /* queried from HW if ~(u32)0 OR mmu_fault_engines == 0*/
 	bool id_is_tsg)
 {
+	u32 rlid;
 	bool verbose;
 
 	nvgpu_log_fn(g, " ");
 
-	nvgpu_fifo_lock_active_runlists(g);
+	nvgpu_log_info(g, "acquire runlist_lock for all runlists");
+	for (rlid = 0; rlid < g->fifo.max_runlists; rlid++) {
+		nvgpu_mutex_acquire(&g->fifo.runlist_info[rlid]->runlist_lock);
+	}
 
 	verbose = gk20a_fifo_handle_mmu_fault_locked(g, mmu_fault_engines,
 			hw_id, id_is_tsg);
 
-	nvgpu_fifo_unlock_active_runlists(g);
-
+	nvgpu_log_info(g, "release runlist_lock for all runlists");
+	for (rlid = 0; rlid < g->fifo.max_runlists; rlid++) {
+		nvgpu_mutex_release(&g->fifo.runlist_info[rlid]->runlist_lock);
+	}
 	return verbose;
 }
 
@@ -1444,8 +1450,12 @@ void gk20a_fifo_teardown_ch_tsg(struct gk20a *g, u32 __engine_ids,
 	bool ref_id_is_tsg = false;
 	bool id_is_known = (id_type != ID_TYPE_UNKNOWN) ? true : false;
 	bool id_is_tsg = (id_type == ID_TYPE_TSG) ? true : false;
+	u32 rlid;
 
-	nvgpu_fifo_lock_active_runlists(g);
+	nvgpu_log_info(g, "acquire runlist_lock for all runlists");
+	for (rlid = 0; rlid < g->fifo.max_runlists; rlid++) {
+		nvgpu_mutex_acquire(&g->fifo.runlist_info[rlid]->runlist_lock);
+	}
 
 	if (id_is_known) {
 		engine_ids = g->ops.fifo.get_engines_mask_on_id(g,
@@ -1504,7 +1514,10 @@ void gk20a_fifo_teardown_ch_tsg(struct gk20a *g, u32 __engine_ids,
 		g->ops.fifo.teardown_unmask_intr(g);
 	}
 
-	nvgpu_fifo_unlock_active_runlists(g);
+	nvgpu_log_info(g, "release runlist_lock for all runlists");
+	for (rlid = 0; rlid < g->fifo.max_runlists; rlid++) {
+		nvgpu_mutex_release(&g->fifo.runlist_info[rlid]->runlist_lock);
+	}
 }
 
 void gk20a_fifo_recover(struct gk20a *g, u32 engine_ids,
@@ -2249,14 +2262,18 @@ int __locked_fifo_preempt(struct gk20a *g, u32 id, bool is_tsg)
 
 int gk20a_fifo_preempt_channel(struct gk20a *g, struct channel_gk20a *ch)
 {
+	struct fifo_gk20a *f = &g->fifo;
 	int ret = 0;
 	u32 token = PMU_INVALID_MUTEX_OWNER_ID;
 	int mutex_ret = -EINVAL;
+	u32 i;
 
 	nvgpu_log_fn(g, "chid: %d", ch->chid);
 
 	/* we have no idea which runlist we are using. lock all */
-	nvgpu_fifo_lock_active_runlists(g);
+	for (i = 0; i < g->fifo.max_runlists; i++) {
+		nvgpu_mutex_acquire(&f->runlist_info[i]->runlist_lock);
+	}
 
 	if (g->ops.pmu.is_pmu_supported(g)) {
 		mutex_ret = nvgpu_pmu_mutex_acquire(&g->pmu,
@@ -2269,7 +2286,9 @@ int gk20a_fifo_preempt_channel(struct gk20a *g, struct channel_gk20a *ch)
 		nvgpu_pmu_mutex_release(&g->pmu, PMU_MUTEX_ID_FIFO, &token);
 	}
 
-	nvgpu_fifo_unlock_active_runlists(g);
+	for (i = 0; i < g->fifo.max_runlists; i++) {
+		nvgpu_mutex_release(&f->runlist_info[i]->runlist_lock);
+	}
 
 	if (ret != 0) {
 		if (nvgpu_platform_is_silicon(g)) {
@@ -2288,14 +2307,18 @@ int gk20a_fifo_preempt_channel(struct gk20a *g, struct channel_gk20a *ch)
 
 int gk20a_fifo_preempt_tsg(struct gk20a *g, struct tsg_gk20a *tsg)
 {
+	struct fifo_gk20a *f = &g->fifo;
 	int ret = 0;
 	u32 token = PMU_INVALID_MUTEX_OWNER_ID;
 	int mutex_ret = -EINVAL;
+	u32 i;
 
 	nvgpu_log_fn(g, "tsgid: %d", tsg->tsgid);
 
 	/* we have no idea which runlist we are using. lock all */
-	nvgpu_fifo_lock_active_runlists(g);
+	for (i = 0; i < g->fifo.max_runlists; i++) {
+		nvgpu_mutex_acquire(&f->runlist_info[i]->runlist_lock);
+	}
 
 	if (g->ops.pmu.is_pmu_supported(g)) {
 		mutex_ret = nvgpu_pmu_mutex_acquire(&g->pmu,
@@ -2308,7 +2331,9 @@ int gk20a_fifo_preempt_tsg(struct gk20a *g, struct tsg_gk20a *tsg)
 		nvgpu_pmu_mutex_release(&g->pmu, PMU_MUTEX_ID_FIFO, &token);
 	}
 
-	nvgpu_fifo_unlock_active_runlists(g);
+	for (i = 0; i < g->fifo.max_runlists; i++) {
+		nvgpu_mutex_release(&f->runlist_info[i]->runlist_lock);
+	}
 
 	if (ret != 0) {
 		if (nvgpu_platform_is_silicon(g)) {

drivers/gpu/nvgpu/gk20a/fifo_gk20a.h

@@ -75,7 +75,6 @@ struct tsg_gk20a;
 /* generally corresponds to the "pbdma" engine */
 
 struct fifo_runlist_info_gk20a {
-	u32 runlist_id;
 	unsigned long *active_channels;
 	unsigned long *active_tsgs;
 	/* Each engine has its own SW and HW runlist buffer.*/
@@ -150,16 +149,8 @@ struct fifo_gk20a {
 	u32 num_engines;
 	u32 *active_engines_list;
 
-	/* Pointers to runlists, indexed by real hw runlist_id.
-	 * If a runlist is active, then runlist_info[runlist_id] points
-	 * to one entry in active_runlist_info. Otherwise, it is NULL.
-	 */
 	struct fifo_runlist_info_gk20a **runlist_info;
 	u32 max_runlists;
-
-	/* Array of runlists that are actually in use */
-	struct fifo_runlist_info_gk20a *active_runlist_info;
-	u32 num_runlists; /* number of active runlists */
 #ifdef CONFIG_DEBUG_FS
 	struct {
 		struct fifo_profile_gk20a *data;

drivers/gpu/nvgpu/gv11b/fifo_gv11b.c

@@ -624,7 +624,7 @@ static u32 gv11b_fifo_get_runlists_mask(struct gk20a *g, u32 act_eng_bitmask,
 	u32 runlists_mask = 0;
 	struct fifo_gk20a *f = &g->fifo;
 	struct fifo_runlist_info_gk20a *runlist;
-	u32 i, pbdma_bitmask = 0;
+	u32 rlid, pbdma_bitmask = 0;
 
 	if (id_type != ID_TYPE_UNKNOWN) {
 		if (id_type == ID_TYPE_TSG) {
@@ -639,30 +639,30 @@ static u32 gv11b_fifo_get_runlists_mask(struct gk20a *g, u32 act_eng_bitmask,
 			pbdma_bitmask = BIT32(mmfault->faulted_pbdma);
 		}
 
-		for (i = 0U; i < f->num_runlists; i++) {
-			runlist = &f->active_runlist_info[i];
+		for (rlid = 0; rlid < f->max_runlists; rlid++) {
+
+			runlist = f->runlist_info[rlid];
 
 			if ((runlist->eng_bitmask & act_eng_bitmask) != 0U) {
-				runlists_mask |= BIT32(runlist->runlist_id);
+				runlists_mask |= BIT32(rlid);
 			}
 
 			if ((runlist->pbdma_bitmask & pbdma_bitmask) != 0U) {
-				runlists_mask |= BIT32(runlist->runlist_id);
+				runlists_mask |= BIT32(rlid);
 			}
 		}
 	}
 
 	if (id_type == ID_TYPE_UNKNOWN) {
-		for (i = 0U; i < f->num_runlists; i++) {
-			runlist = &f->active_runlist_info[i];
-
+		for (rlid = 0; rlid < f->max_runlists; rlid++) {
 			if (act_eng_bitmask != 0U) {
 				/* eng ids are known */
+				runlist = f->runlist_info[rlid];
 				if ((runlist->eng_bitmask & act_eng_bitmask) != 0U) {
-					runlists_mask |= BIT32(runlist->runlist_id);
-				}
+					runlists_mask |= BIT32(rlid);
+                                }
 			} else {
-				runlists_mask |= BIT32(runlist->runlist_id);
+				runlists_mask |= BIT32(rlid);
 			}
 		}
 	}
@@ -813,11 +813,9 @@ int gv11b_fifo_preempt_tsg(struct gk20a *g, struct tsg_gk20a *tsg)
 static void gv11b_fifo_locked_preempt_runlists_rc(struct gk20a *g,
 						u32 runlists_mask)
 {
-	struct fifo_gk20a *f = &g->fifo;
-	struct fifo_runlist_info_gk20a *runlist;
 	u32 token = PMU_INVALID_MUTEX_OWNER_ID;
 	int mutex_ret = -EINVAL;
-	u32 i;
+	u32 rlid;
 
 	/* runlist_lock are locked by teardown and sched are disabled too */
 	nvgpu_log_fn(g, "preempt runlists_mask:0x%08x", runlists_mask);
@@ -835,12 +833,11 @@ static void gv11b_fifo_locked_preempt_runlists_rc(struct gk20a *g,
 	 * Do not poll for preemption to complete. Reset engines served by
 	 * runlists.
 	 */
-	for (i = 0U; i < f->num_runlists; i++) {
-		runlist = &f->active_runlist_info[i];
-
-		if ((fifo_runlist_preempt_runlist_m(runlist->runlist_id) &
-				runlists_mask) != 0U) {
-			runlist->reset_eng_bitmask = runlist->eng_bitmask;
+	for (rlid = 0; rlid < g->fifo.max_runlists; rlid++) {
+		if ((runlists_mask &
+			fifo_runlist_preempt_runlist_m(rlid)) != 0U) {
+			g->fifo.runlist_info[rlid]->reset_eng_bitmask =
+			g->fifo.runlist_info[rlid]->eng_bitmask;
 		}
 	}
 
@@ -858,14 +855,13 @@ static void gv11b_fifo_locked_abort_runlist_active_tsgs(struct gk20a *g,
 			unsigned int rc_type,
 			u32 runlists_mask)
 {
-	struct fifo_gk20a *f = &g->fifo;
 	struct tsg_gk20a *tsg = NULL;
 	unsigned long tsgid;
+	u32 rlid;
 	struct fifo_runlist_info_gk20a *runlist = NULL;
 	u32 token = PMU_INVALID_MUTEX_OWNER_ID;
 	int mutex_ret = -EINVAL;
 	int err;
-	u32 i;
 
 	nvgpu_err(g, "runlist id unknown, abort active tsgs in runlists");
 
@@ -875,14 +871,14 @@ static void gv11b_fifo_locked_abort_runlist_active_tsgs(struct gk20a *g,
 						PMU_MUTEX_ID_FIFO, &token);
 	}
 
-	for (i = 0U; i < f->num_runlists; i++) {
-		runlist = &f->active_runlist_info[i];
-
-		if ((runlists_mask & BIT32(runlist->runlist_id)) == 0U) {
+	for (rlid = 0; rlid < g->fifo.max_runlists;
+						 rlid++) {
+		if ((runlists_mask & BIT32(rlid)) == 0U) {
 			continue;
 		}
 		nvgpu_log(g, gpu_dbg_info, "abort runlist id %d",
-				runlist->runlist_id);
+				rlid);
+		runlist = g->fifo.runlist_info[rlid];
 
 		for_each_set_bit(tsgid, runlist->active_tsgs,
 			g->fifo.num_channels) {
@@ -920,11 +916,11 @@ static void gv11b_fifo_locked_abort_runlist_active_tsgs(struct gk20a *g,
 			 * remove all entries from this runlist; don't wait for
 			 * the update to finish on hw.
 			 */
-			err = gk20a_runlist_update_locked(g, runlist->runlist_id,
+			err = gk20a_runlist_update_locked(g, rlid,
 					NULL, false, false);
 			if (err != 0) {
 				nvgpu_err(g, "runlist id %d is not cleaned up",
-					runlist->runlist_id);
+					rlid);
 			}
 
 			gk20a_fifo_abort_tsg(g, tsg, false);
@@ -974,7 +970,7 @@ void gv11b_fifo_teardown_ch_tsg(struct gk20a *g, u32 act_eng_bitmask,
 			 struct mmu_fault_info *mmfault)
 {
 	struct tsg_gk20a *tsg = NULL;
-	u32 runlists_mask, rlid, i;
+	u32 runlists_mask, rlid;
 	unsigned long pbdma_id;
 	struct fifo_runlist_info_gk20a *runlist = NULL;
 	unsigned long engine_id;
@@ -984,7 +980,11 @@ void gv11b_fifo_teardown_ch_tsg(struct gk20a *g, u32 act_eng_bitmask,
 	u32 num_runlists = 0U;
 	unsigned long runlist_served_pbdmas;
 
-	nvgpu_fifo_lock_active_runlists(g);
+	nvgpu_log_fn(g, "acquire runlist_lock for all runlists");
+	for (rlid = 0; rlid < g->fifo.max_runlists; rlid++) {
+		nvgpu_mutex_acquire(&f->runlist_info[rlid]->
+			runlist_lock);
+	}
 
 	g->ops.fifo.teardown_mask_intr(g);
 
@@ -1007,12 +1007,16 @@ void gv11b_fifo_teardown_ch_tsg(struct gk20a *g, u32 act_eng_bitmask,
 		 * it corresponds to single runlist id. If eng mask corresponds
 		 * to multiple runlists, then abort all runlists
 		 */
-		for (i = 0U; i < f->num_runlists; i++) {
-			runlist = &f->active_runlist_info[i];
-
-			if ((runlist->eng_bitmask & act_eng_bitmask) != 0U) {
-				runlist_id = runlist->runlist_id;
-				num_runlists++;
+		for (rlid = 0; rlid < f->max_runlists; rlid++) {
+			if (act_eng_bitmask != 0U) {
+				/* eng ids are known */
+				runlist = f->runlist_info[rlid];
+				if ((runlist->eng_bitmask & act_eng_bitmask) != 0U) {
+					runlist_id = rlid;
+					num_runlists++;
+				}
+			} else {
+				break;
 			}
 		}
 		if (num_runlists > 1U) {
@@ -1026,14 +1030,12 @@ void gv11b_fifo_teardown_ch_tsg(struct gk20a *g, u32 act_eng_bitmask,
 	 * needed for this recovery
 	 */
 	if (runlist_id != FIFO_INVAL_RUNLIST_ID && num_runlists == 1U) {
-		for (i = 0U; i < f->num_runlists; i++) {
-			runlist = &f->active_runlist_info[i];
-
-			if (runlist->runlist_id != runlist_id) {
+		for (rlid = 0; rlid < g->fifo.max_runlists; rlid++) {
+			if (rlid != runlist_id) {
 				nvgpu_log_fn(g, "release runlist_lock for "
-						"unused runlist id: %d",
-						runlist->runlist_id);
-				nvgpu_mutex_release(&runlist->runlist_lock);
+					"unused runlist id: %d", rlid);
+				nvgpu_mutex_release(&f->runlist_info[rlid]->
+					runlist_lock);
 			}
 		}
 	}
@@ -1115,10 +1117,10 @@ void gv11b_fifo_teardown_ch_tsg(struct gk20a *g, u32 act_eng_bitmask,
 	}
 
 	/* check if engine reset should be deferred */
-	for (i = 0U; i < f->num_runlists; i++) {
-		runlist = &f->active_runlist_info[i];
+	for (rlid = 0; rlid < g->fifo.max_runlists; rlid++) {
 
-		if (((runlists_mask & BIT32(runlist->runlist_id)) != 0U) &&
+		runlist = g->fifo.runlist_info[rlid];
+		if (((runlists_mask & BIT32(rlid)) != 0U) &&
 		    (runlist->reset_eng_bitmask != 0U)) {
 
 			unsigned long __reset_eng_bitmask =
@@ -1191,10 +1193,13 @@ void gv11b_fifo_teardown_ch_tsg(struct gk20a *g, u32 act_eng_bitmask,
 	if (runlist_id != FIFO_INVAL_RUNLIST_ID) {
 		nvgpu_log_fn(g, "release runlist_lock runlist_id = %d",
 				runlist_id);
-		runlist = f->runlist_info[runlist_id];
-		nvgpu_mutex_release(&runlist->runlist_lock);
+		nvgpu_mutex_release(&f->runlist_info[runlist_id]->runlist_lock);
 	} else {
-		nvgpu_fifo_unlock_active_runlists(g);
+		nvgpu_log_fn(g, "release runlist_lock for all runlists");
+		for (rlid = 0; rlid < g->fifo.max_runlists; rlid++) {
+			nvgpu_mutex_release(&f->runlist_info[rlid]->
+				runlist_lock);
+		}
 	}
 }
 

drivers/gpu/nvgpu/include/nvgpu/runlist.h

@@ -58,7 +58,4 @@ void gk20a_fifo_set_runlist_state(struct gk20a *g, u32 runlists_mask,
 void gk20a_fifo_delete_runlist(struct fifo_gk20a *f);
 int nvgpu_init_runlist(struct gk20a *g, struct fifo_gk20a *f);
 
-void nvgpu_fifo_lock_active_runlists(struct gk20a *g);
-void nvgpu_fifo_unlock_active_runlists(struct gk20a *g);
-
 #endif /* NVGPU_RUNLIST_H */