drm/nouveau/fifo/gk104-: switch dev_top fault handling to type+inst

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>

drivers/gpu/drm/nouveau/include/nvkm/subdev/top.h

@@ -12,7 +12,6 @@ struct nvkm_top {
 struct nvkm_top_device {
 	enum nvkm_subdev_type type;
 	int inst;
-	enum nvkm_devidx index;
 	u32 addr;
 	int fault;
 	int engine;
@@ -26,7 +25,7 @@ u32 nvkm_top_addr(struct nvkm_device *, enum nvkm_subdev_type, int);
 u32 nvkm_top_reset(struct nvkm_device *, enum nvkm_subdev_type, int);
 u32 nvkm_top_intr_mask(struct nvkm_device *, enum nvkm_subdev_type, int);
 int nvkm_top_fault_id(struct nvkm_device *, enum nvkm_subdev_type, int);
-enum nvkm_devidx nvkm_top_fault(struct nvkm_device *, int fault);
+struct nvkm_subdev *nvkm_top_fault(struct nvkm_device *, int fault);
 
 int gk104_top_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_top **);
 #endif

drivers/gpu/drm/nouveau/nvkm/engine/fifo/gk104.c

@@ -483,7 +483,8 @@ gk104_fifo_fault(struct nvkm_fifo *base, struct nvkm_fault_data *info)
 	struct nvkm_engine *engine = NULL;
 	struct nvkm_fifo_chan *chan;
 	unsigned long flags;
-	char ct[8] = "HUB/", en[16] = "";
+	const char *en = "";
+	char ct[8] = "HUB/";
 
 	er = nvkm_enum_find(fifo->func->fault.reason, info->reason);
 	ee = nvkm_enum_find(fifo->func->fault.engine, info->engine);
@@ -513,17 +514,14 @@ gk104_fifo_fault(struct nvkm_fifo *base, struct nvkm_fault_data *info)
 	}
 
 	if (ee == NULL) {
-		enum nvkm_devidx engidx = nvkm_top_fault(device, info->engine);
-		if (engidx < NVKM_SUBDEV_NR) {
-			const char *src = nvkm_subdev_type[engidx];
-			char *dst = en;
-			do {
-				*dst++ = toupper(*src++);
-			} while(*src);
-			engine = nvkm_device_engine(device, engidx, 0);
+		struct nvkm_subdev *subdev = nvkm_top_fault(device, info->engine);
+		if (subdev) {
+			if (subdev->func == &nvkm_engine)
+				engine = container_of(subdev, typeof(*engine), subdev);
+			en = engine->subdev.name;
 		}
 	} else {
-		snprintf(en, sizeof(en), "%s", ee->name);
+		en = ee->name;
 	}
 
 	spin_lock_irqsave(&fifo->base.lock, flags);

drivers/gpu/drm/nouveau/nvkm/engine/fifo/tu102.c

@@ -278,7 +278,8 @@ tu102_fifo_fault(struct nvkm_fifo *base, struct nvkm_fault_data *info)
 	struct nvkm_engine *engine = NULL;
 	struct nvkm_fifo_chan *chan;
 	unsigned long flags;
-	char ct[8] = "HUB/", en[16] = "";
+	const char *en = "";
+	char ct[8] = "HUB/";
 	int engn;
 
 	er = nvkm_enum_find(fifo->func->fault.reason, info->reason);
@@ -309,19 +310,14 @@ tu102_fifo_fault(struct nvkm_fifo *base, struct nvkm_fault_data *info)
 	}
 
 	if (ee == NULL) {
-		enum nvkm_devidx engidx = nvkm_top_fault(device, info->engine);
-
-		if (engidx < NVKM_SUBDEV_NR) {
-			const char *src = nvkm_subdev_type[engidx];
-			char *dst = en;
-
-			do {
-				*dst++ = toupper(*src++);
-			} while (*src);
-			engine = nvkm_device_engine(device, engidx, 0);
+		struct nvkm_subdev *subdev = nvkm_top_fault(device, info->engine);
+		if (subdev) {
+			if (subdev->func == &nvkm_engine)
+				engine = container_of(subdev, typeof(*engine), subdev);
+			en = engine->subdev.name;
 		}
 	} else {
-		snprintf(en, sizeof(en), "%s", ee->name);
+		en = ee->name;
 	}
 
 	spin_lock_irqsave(&fifo->base.lock, flags);

drivers/gpu/drm/nouveau/nvkm/subdev/top/base.c

@@ -30,7 +30,6 @@ nvkm_top_device_new(struct nvkm_top *top)
 	if (info) {
 		info->type = NVKM_SUBDEV_NR;
 		info->inst = -1;
-		info->index = NVKM_SUBDEV_NR;
 		info->addr = 0;
 		info->fault = -1;
 		info->engine = -1;
@@ -104,7 +103,7 @@ nvkm_top_fault_id(struct nvkm_device *device, enum nvkm_subdev_type type, int in
 	return -ENOENT;
 }
 
-enum nvkm_devidx
+struct nvkm_subdev *
 nvkm_top_fault(struct nvkm_device *device, int fault)
 {
 	struct nvkm_top *top = device->top;
@@ -112,10 +111,10 @@ nvkm_top_fault(struct nvkm_device *device, int fault)
 
 	list_for_each_entry(info, &top->device, head) {
 		if (info->fault == fault)
-			return info->index;
+			return nvkm_device_subdev(device, info->type, info->inst);
 	}
 
-	return NVKM_SUBDEV_NR;
+	return NULL;
 }
 
 static int

drivers/gpu/drm/nouveau/nvkm/subdev/top/gk104.c

@@ -70,7 +70,7 @@ gk104_top_oneinit(struct nvkm_top *top)
 			continue;
 
 		/* Translate engine type to NVKM engine identifier. */
-#define I_(T,I) do { info->type = (T); info->inst = (I); info->index = (T) + (I); } while(0)
+#define I_(T,I) do { info->type = (T); info->inst = (I); } while(0)
 #define O_(T,I) do { WARN_ON(inst); I_(T, I); } while (0)
 		switch (type) {
 		case 0x00000000: O_(NVKM_ENGINE_GR    ,    0); break;