drm/nouveau/nvif: device time mthd

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

drivers/gpu/drm/nouveau/include/nvif/class.h

@@ -129,6 +129,7 @@ struct nv_device_v0 {
 };
 
 #define NV_DEVICE_V0_INFO                                                  0x00
+#define NV_DEVICE_V0_TIME                                                  0x01
 
 struct nv_device_info_v0 {
 	__u8  version;
@@ -157,6 +158,12 @@ struct nv_device_info_v0 {
 	char  name[64];
 };
 
+struct nv_device_time_v0 {
+	__u8  version;
+	__u8  pad01[7];
+	__u64 time;
+};
+
 
 /*******************************************************************************
  * context dma

drivers/gpu/drm/nouveau/include/nvif/device.h

@@ -57,7 +57,6 @@ u64  nvif_device_time(struct nvif_device *);
 #define nvxx_gpio(a) nvkm_gpio(nvxx_device(a))
 #define nvxx_clk(a) nvkm_clk(nvxx_device(a))
 #define nvxx_i2c(a) nvkm_i2c(nvxx_device(a))
-#define nvxx_timer(a) nvkm_timer(nvxx_device(a))
 #define nvxx_therm(a) nvkm_therm(nvxx_device(a))
 
 #include <core/device.h>

drivers/gpu/drm/nouveau/nvif/device.c

@@ -27,7 +27,11 @@
 u64
 nvif_device_time(struct nvif_device *device)
 {
-	return nvxx_timer(device)->read(nvxx_timer(device));
+	struct nv_device_time_v0 args = {};
+	int ret = nvif_object_mthd(&device->object, NV_DEVICE_V0_TIME,
+				   &args, sizeof(args));
+	WARN_ON_ONCE(ret != 0);
+	return args.time;
 }
 
 void

drivers/gpu/drm/nouveau/nvkm/engine/device/user.c

@@ -26,6 +26,7 @@
 #include <core/client.h>
 #include <subdev/fb.h>
 #include <subdev/instmem.h>
+#include <subdev/timer.h>
 
 #include <nvif/class.h>
 #include <nvif/unpack.h>
@@ -111,12 +112,32 @@ nvkm_udevice_info(struct nvkm_object *object, void *data, u32 size)
 	return 0;
 }
 
+static int
+nvkm_udevice_time(struct nvkm_object *object, void *data, u32 size)
+{
+	struct nvkm_udevice *udev = (void *)object;
+	struct nvkm_device *device = udev->device;
+	struct nvkm_timer *tmr = device->timer;
+	union {
+		struct nv_device_time_v0 v0;
+	} *args = data;
+	int ret;
+
+	if (nvif_unpack(args->v0, 0, 0, false)) {
+		args->v0.time = tmr->read(tmr);
+	}
+
+	return ret;
+}
+
 static int
 nvkm_udevice_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
 {
 	switch (mthd) {
 	case NV_DEVICE_V0_INFO:
 		return nvkm_udevice_info(object, data, size);
+	case NV_DEVICE_V0_TIME:
+		return nvkm_udevice_time(object, data, size);
 	default:
 		break;
 	}