drm/nouveau/core: type-safe printk macros

These require an explicit pointers to nvkm_object/nvkm_subdev/nvkm_device,
depending on which macros are used.  This is unlike the previous macros
which take a void *, and work for anything derived from nvkm_object (by
way of some awful heuristics).

The output will be a bit confused until everything has been transitioned,
as the logging format used is a more standard style that previously.

In addition, usage of pr_cont(), which doesn't work correctly with the
dev_*() printk functions (and was potentially racy to begin with), will
be replaced.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/include/nvkm/core/client.h

@@ -52,4 +52,16 @@ int nvkm_client_notify_new(struct nvkm_object *, struct nvkm_event *,
 int nvkm_client_notify_del(struct nvkm_client *, int index);
 int nvkm_client_notify_get(struct nvkm_client *, int index);
 int nvkm_client_notify_put(struct nvkm_client *, int index);
+
+/* logging for client-facing objects */
+#define nvif_printk(o,l,p,f,a...) do {                                         \
+	struct nvkm_object *_object = (o);                                     \
+	struct nvkm_client *_client = nvkm_client(_object);                    \
+	if (_client->debug >= NV_DBG_##l)                                      \
+		printk(KERN_##p "nouveau: %s: "f, _client->name, ##a);         \
+} while(0)
+#define nvif_error(o,f,a...) nvif_printk((o), ERROR,  ERR, f, ##a)
+#define nvif_debug(o,f,a...) nvif_printk((o), DEBUG, INFO, f, ##a)
+#define nvif_trace(o,f,a...) nvif_printk((o), TRACE, INFO, f, ##a)
+#define nvif_ioctl(o,f,a...) nvif_trace((o), "ioctl: "f, ##a)
 #endif

drivers/gpu/drm/nouveau/include/nvkm/core/device.h

@@ -214,4 +214,19 @@ enum nv_bus_type {
 int  nvkm_device_create_(void *, enum nv_bus_type type, u64 name,
 			    const char *sname, const char *cfg, const char *dbg,
 			    int, void **);
+
+/* device logging */
+#define nvdev_printk_(d,l,p,f,a...) do {                                       \
+	struct nvkm_device *_device = (d);                                     \
+	if (_device->engine.subdev.debug >= (l))                               \
+		dev_##p(_device->dev, f, ##a);                                 \
+} while(0)
+#define nvdev_printk(d,l,p,f,a...) nvdev_printk_((d), NV_DBG_##l, p, f, ##a)
+#define nvdev_fatal(d,f,a...) nvdev_printk((d), FATAL,   crit, f, ##a)
+#define nvdev_error(d,f,a...) nvdev_printk((d), ERROR,    err, f, ##a)
+#define nvdev_warn(d,f,a...)  nvdev_printk((d),  WARN, notice, f, ##a)
+#define nvdev_info(d,f,a...)  nvdev_printk((d),  INFO,   info, f, ##a)
+#define nvdev_debug(d,f,a...) nvdev_printk((d), DEBUG,   info, f, ##a)
+#define nvdev_trace(d,f,a...) nvdev_printk((d), TRACE,   info, f, ##a)
+#define nvdev_spam(d,f,a...)  nvdev_printk((d),  SPAM,    dbg, f, ##a)
 #endif

drivers/gpu/drm/nouveau/include/nvkm/core/enum.h

@@ -18,4 +18,5 @@ struct nvkm_bitfield {
 };
 
 void nvkm_bitfield_print(const struct nvkm_bitfield *, u32 value);
+void nvkm_snprintbf(char *, int, const struct nvkm_bitfield *, u32 value);
 #endif

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

@@ -11,7 +11,7 @@ struct nvkm_subdev {
 	struct nvkm_device *device;
 
 	struct mutex mutex;
-	const char *name;
+	const char *name, *sname;
 	u32 debug;
 	u32 unit;
 
@@ -53,11 +53,20 @@ void _nvkm_subdev_dtor(struct nvkm_object *);
 int  _nvkm_subdev_init(struct nvkm_object *);
 int  _nvkm_subdev_fini(struct nvkm_object *, bool suspend);
 
-#define s_printk(s,l,f,a...) do {                                              \
-	if ((s)->debug >= OS_DBG_##l) {                                        \
-		nv_printk((s)->base.parent, (s)->name, l, f, ##a);             \
-	}                                                                      \
+/* subdev logging */
+#define nvkm_printk_(s,l,p,f,a...) do {                                        \
+	struct nvkm_subdev *_subdev = (s);                                     \
+	if (_subdev->debug >= (l))                                             \
+		dev_##p(_subdev->device->dev, "%s: "f, _subdev->sname, ##a);   \
 } while(0)
+#define nvkm_printk(s,l,p,f,a...) nvkm_printk_((s), NV_DBG_##l, p, f, ##a)
+#define nvkm_fatal(s,f,a...) nvkm_printk((s), FATAL,   crit, f, ##a)
+#define nvkm_error(s,f,a...) nvkm_printk((s), ERROR,    err, f, ##a)
+#define nvkm_warn(s,f,a...)  nvkm_printk((s),  WARN, notice, f, ##a)
+#define nvkm_info(s,f,a...)  nvkm_printk((s),  INFO,   info, f, ##a)
+#define nvkm_debug(s,f,a...) nvkm_printk((s), DEBUG,   info, f, ##a)
+#define nvkm_trace(s,f,a...) nvkm_printk((s), TRACE,   info, f, ##a)
+#define nvkm_spam(s,f,a...)  nvkm_printk((s),  SPAM,    dbg, f, ##a)
 
 #include <core/engine.h>
 #endif

drivers/gpu/drm/nouveau/nvkm/core/enum.c

@@ -64,3 +64,20 @@ nvkm_bitfield_print(const struct nvkm_bitfield *bf, u32 value)
 	if (value)
 		pr_cont(" (unknown bits 0x%08x)", value);
 }
+
+void
+nvkm_snprintbf(char *data, int size, const struct nvkm_bitfield *bf, u32 value)
+{
+	bool space = false;
+	while (size >= 1 && bf->name) {
+		if (value & bf->mask) {
+			int this = snprintf(data, size, "%s%s",
+					    space ? " " : "", bf->name);
+			size -= this;
+			data += this;
+			space = true;
+		}
+		bf++;
+	}
+	data[0] = '\0';
+}

drivers/gpu/drm/nouveau/nvkm/core/subdev.c

@@ -111,6 +111,7 @@ nvkm_subdev_create_(struct nvkm_object *parent, struct nvkm_object *engine,
 
 	__mutex_init(&subdev->mutex, subname, &oclass->lock_class_key);
 	subdev->name = subname;
+	subdev->sname = sysname;
 
 	if (parent) {
 		struct nvkm_device *device = nv_device(parent);