gpu: nvgpu: add HAL to handle nonstall interrupts

Add new HAL gops.mc.isr_nonstall() to handle nonstall interrupts

We already handle nonstall interrupts in nvgpu_intr_nonstall()
But this API is completely in linux specific code

Separate out os-independent code to handle nonstall interrupts in new API
mc_gk20a_isr_nonstall() and set it to HAL gops.mc.isr_nonstall() for all
existing chips

Call this HAL from nvgpu_intr_nonstall()

Jira NVGPUT-8

Change-Id: Iec6a56db03158a72a256f7eee8989a0a8a42ae2f
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1706589
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

drivers/gpu/nvgpu/common/linux/intr.c

@@ -69,11 +69,8 @@ irqreturn_t nvgpu_intr_thread_stall(struct gk20a *g)
 
 irqreturn_t nvgpu_intr_nonstall(struct gk20a *g)
 {
-	u32 mc_intr_1;
+	u32 non_stall_intr_val;
 	u32 hw_irq_count;
-	u32 engine_id_idx;
-	u32 active_engine_id = 0;
-	u32 engine_enum = ENGINE_INVAL_GK20A;
 	int ops_old, ops_new, ops = 0;
 	struct nvgpu_os_linux *l = nvgpu_os_linux_from_gk20a(g);
 
@@ -81,37 +78,13 @@ irqreturn_t nvgpu_intr_nonstall(struct gk20a *g)
 		return IRQ_NONE;
 
 	/* not from gpu when sharing irq with others */
-	mc_intr_1 = g->ops.mc.intr_nonstall(g);
-	if (unlikely(!mc_intr_1))
+	non_stall_intr_val = g->ops.mc.intr_nonstall(g);
+	if (unlikely(!non_stall_intr_val))
 		return IRQ_NONE;
 
 	g->ops.mc.intr_nonstall_pause(g);
 
-	if (g->ops.mc.is_intr1_pending(g, NVGPU_UNIT_FIFO, mc_intr_1))
-		ops |= gk20a_fifo_nonstall_isr(g);
-
-	for (engine_id_idx = 0; engine_id_idx < g->fifo.num_engines;
-							engine_id_idx++) {
-		struct fifo_engine_info_gk20a *engine_info;
-
-		active_engine_id = g->fifo.active_engines_list[engine_id_idx];
-		engine_info = &g->fifo.engine_info[active_engine_id];
-
-		if (mc_intr_1 & engine_info->intr_mask) {
-			engine_enum = engine_info->engine_enum;
-			/* GR Engine */
-			if (engine_enum == ENGINE_GR_GK20A)
-				ops |= gk20a_gr_nonstall_isr(g);
-
-			/* CE Engine */
-			if (((engine_enum == ENGINE_GRCE_GK20A) ||
-				(engine_enum == ENGINE_ASYNC_CE_GK20A)) &&
-				g->ops.ce2.isr_nonstall)
-					ops |= g->ops.ce2.isr_nonstall(g,
-						engine_info->inst_id,
-						engine_info->pri_base);
-		}
-	}
+	ops = g->ops.mc.isr_nonstall(g);
 	if (ops) {
 		do {
 			ops_old = atomic_read(&l->nonstall_ops);

drivers/gpu/nvgpu/gk20a/gk20a.h

@@ -1066,6 +1066,7 @@ struct gpu_ops {
 		u32 (*intr_nonstall)(struct gk20a *g);
 		void (*intr_nonstall_pause)(struct gk20a *g);
 		void (*intr_nonstall_resume)(struct gk20a *g);
+		int (*isr_nonstall)(struct gk20a *g);
 		void (*enable)(struct gk20a *g, u32 units);
 		void (*disable)(struct gk20a *g, u32 units);
 		void (*reset)(struct gk20a *g, u32 units);

drivers/gpu/nvgpu/gk20a/mc_gk20a.c

@@ -74,6 +74,45 @@ void mc_gk20a_isr_stall(struct gk20a *g)
 		g->ops.bus.isr(g);
 }
 
+int mc_gk20a_isr_nonstall(struct gk20a *g)
+{
+	int ops = 0;
+	u32 mc_intr_1;
+	u32 engine_id_idx;
+	u32 active_engine_id = 0;
+	u32 engine_enum = ENGINE_INVAL_GK20A;
+
+	mc_intr_1 = g->ops.mc.intr_nonstall(g);
+
+	if (g->ops.mc.is_intr1_pending(g, NVGPU_UNIT_FIFO, mc_intr_1))
+		ops |= gk20a_fifo_nonstall_isr(g);
+
+	for (engine_id_idx = 0; engine_id_idx < g->fifo.num_engines;
+							engine_id_idx++) {
+		struct fifo_engine_info_gk20a *engine_info;
+
+		active_engine_id = g->fifo.active_engines_list[engine_id_idx];
+		engine_info = &g->fifo.engine_info[active_engine_id];
+
+		if (mc_intr_1 & engine_info->intr_mask) {
+			engine_enum = engine_info->engine_enum;
+			/* GR Engine */
+			if (engine_enum == ENGINE_GR_GK20A)
+				ops |= gk20a_gr_nonstall_isr(g);
+
+			/* CE Engine */
+			if (((engine_enum == ENGINE_GRCE_GK20A) ||
+			     (engine_enum == ENGINE_ASYNC_CE_GK20A)) &&
+			      g->ops.ce2.isr_nonstall)
+				ops |= g->ops.ce2.isr_nonstall(g,
+					engine_info->inst_id,
+					engine_info->pri_base);
+		}
+	}
+
+	return ops;
+}
+
 void mc_gk20a_intr_enable(struct gk20a *g)
 {
 	u32 eng_intr_mask = gk20a_fifo_engine_interrupt_mask(g);

drivers/gpu/nvgpu/gk20a/mc_gk20a.h

@@ -32,6 +32,7 @@ u32 mc_gk20a_intr_stall(struct gk20a *g);
 void mc_gk20a_intr_stall_pause(struct gk20a *g);
 void mc_gk20a_intr_stall_resume(struct gk20a *g);
 u32 mc_gk20a_intr_nonstall(struct gk20a *g);
+int mc_gk20a_isr_nonstall(struct gk20a *g);
 void mc_gk20a_intr_nonstall_pause(struct gk20a *g);
 void mc_gk20a_intr_nonstall_resume(struct gk20a *g);
 void gk20a_mc_enable(struct gk20a *g, u32 units);

drivers/gpu/nvgpu/gm20b/hal_gm20b.c

@@ -573,6 +573,7 @@ static const struct gpu_ops gm20b_ops = {
 		.intr_nonstall = mc_gk20a_intr_nonstall,
 		.intr_nonstall_pause = mc_gk20a_intr_nonstall_pause,
 		.intr_nonstall_resume = mc_gk20a_intr_nonstall_resume,
+		.isr_nonstall = mc_gk20a_isr_nonstall,
 		.enable = gk20a_mc_enable,
 		.disable = gk20a_mc_disable,
 		.reset = gk20a_mc_reset,

drivers/gpu/nvgpu/gp106/hal_gp106.c

@@ -688,6 +688,7 @@ static const struct gpu_ops gp106_ops = {
 		.intr_nonstall = mc_gp10b_intr_nonstall,
 		.intr_nonstall_pause = mc_gp10b_intr_nonstall_pause,
 		.intr_nonstall_resume = mc_gp10b_intr_nonstall_resume,
+		.isr_nonstall = mc_gk20a_isr_nonstall,
 		.enable = gk20a_mc_enable,
 		.disable = gk20a_mc_disable,
 		.reset = gk20a_mc_reset,

drivers/gpu/nvgpu/gp10b/hal_gp10b.c

@@ -621,6 +621,7 @@ static const struct gpu_ops gp10b_ops = {
 		.intr_nonstall = mc_gp10b_intr_nonstall,
 		.intr_nonstall_pause = mc_gp10b_intr_nonstall_pause,
 		.intr_nonstall_resume = mc_gp10b_intr_nonstall_resume,
+		.isr_nonstall = mc_gk20a_isr_nonstall,
 		.enable = gk20a_mc_enable,
 		.disable = gk20a_mc_disable,
 		.reset = gk20a_mc_reset,

drivers/gpu/nvgpu/gv100/hal_gv100.c

@@ -745,6 +745,7 @@ static const struct gpu_ops gv100_ops = {
 		.intr_nonstall = mc_gp10b_intr_nonstall,
 		.intr_nonstall_pause = mc_gp10b_intr_nonstall_pause,
 		.intr_nonstall_resume = mc_gp10b_intr_nonstall_resume,
+		.isr_nonstall = mc_gk20a_isr_nonstall,
 		.enable = gk20a_mc_enable,
 		.disable = gk20a_mc_disable,
 		.reset = gk20a_mc_reset,

drivers/gpu/nvgpu/gv11b/hal_gv11b.c

@@ -684,6 +684,7 @@ static const struct gpu_ops gv11b_ops = {
 		.intr_nonstall = mc_gp10b_intr_nonstall,
 		.intr_nonstall_pause = mc_gp10b_intr_nonstall_pause,
 		.intr_nonstall_resume = mc_gp10b_intr_nonstall_resume,
+		.isr_nonstall = mc_gk20a_isr_nonstall,
 		.enable = gk20a_mc_enable,
 		.disable = gk20a_mc_disable,
 		.reset = gk20a_mc_reset,

drivers/gpu/nvgpu/vgpu/gp10b/vgpu_hal_gp10b.c

@@ -494,6 +494,7 @@ static const struct gpu_ops vgpu_gp10b_ops = {
 		.intr_nonstall = mc_gp10b_intr_nonstall,
 		.intr_nonstall_pause = mc_gp10b_intr_nonstall_pause,
 		.intr_nonstall_resume = mc_gp10b_intr_nonstall_resume,
+		.isr_nonstall = mc_gk20a_isr_nonstall,
 		.enable = gk20a_mc_enable,
 		.disable = gk20a_mc_disable,
 		.reset = gk20a_mc_reset,

drivers/gpu/nvgpu/vgpu/gv11b/vgpu_hal_gv11b.c

@@ -541,6 +541,7 @@ static const struct gpu_ops vgpu_gv11b_ops = {
 		.intr_nonstall = mc_gp10b_intr_nonstall,
 		.intr_nonstall_pause = mc_gp10b_intr_nonstall_pause,
 		.intr_nonstall_resume = mc_gp10b_intr_nonstall_resume,
+		.isr_nonstall = mc_gk20a_isr_nonstall,
 		.enable = gk20a_mc_enable,
 		.disable = gk20a_mc_disable,
 		.reset = gk20a_mc_reset,