drm/nouveau/core/object: allow arguments to be passed to map function

MMU will be needing this to specify kind info on BAR mappings.

We have no userspace currently using these interfaces, so break the ABI
instead of supporting both.  NVIF version bump so any future use can be
guarded.

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

drivers/gpu/drm/nouveau/dispnv04/disp.c

@@ -48,7 +48,7 @@ nv04_display_create(struct drm_device *dev)
 	if (!disp)
 		return -ENOMEM;
 
-	nvif_object_map(&drm->client.device.object);
+	nvif_object_map(&drm->client.device.object, NULL, 0);
 
 	nouveau_display(dev)->priv = disp;
 	nouveau_display(dev)->dtor = nv04_display_destroy;

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

@@ -1,7 +1,7 @@
 #ifndef __NVIF_IOCTL_H__
 #define __NVIF_IOCTL_H__
 
-#define NVIF_VERSION_LATEST                               0x0000000000000000ULL
+#define NVIF_VERSION_LATEST                               0x0000000000000100ULL
 
 struct nvif_ioctl_v0 {
 	__u8  version;
@@ -83,9 +83,13 @@ struct nvif_ioctl_wr_v0 {
 struct nvif_ioctl_map_v0 {
 	/* nvif_ioctl ... */
 	__u8  version;
-	__u8  pad01[3];
-	__u32 length;
+#define NVIF_IOCTL_MAP_V0_IO                                               0x00
+#define NVIF_IOCTL_MAP_V0_VA                                               0x01
+	__u8  type;
+	__u8  pad02[6];
 	__u64 handle;
+	__u64 length;
+	__u8  data[];
 };
 
 struct nvif_ioctl_unmap {

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

@@ -16,7 +16,7 @@ struct nvif_object {
 	void *priv; /*XXX: hack */
 	struct {
 		void __iomem *ptr;
-		u32 size;
+		u64 size;
 	} map;
 };
 
@@ -29,7 +29,10 @@ void nvif_object_sclass_put(struct nvif_sclass **);
 u32  nvif_object_rd(struct nvif_object *, int, u64);
 void nvif_object_wr(struct nvif_object *, int, u64, u32);
 int  nvif_object_mthd(struct nvif_object *, u32, void *, u32);
-int  nvif_object_map(struct nvif_object *);
+int  nvif_object_map_handle(struct nvif_object *, void *, u32,
+			    u64 *handle, u64 *length);
+void nvif_object_unmap_handle(struct nvif_object *);
+int  nvif_object_map(struct nvif_object *, void *, u32);
 void nvif_object_unmap(struct nvif_object *);
 
 #define nvif_handle(a) (unsigned long)(void *)(a)

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

@@ -19,13 +19,19 @@ struct nvkm_object {
 	struct rb_node node;
 };
 
+enum nvkm_object_map {
+	NVKM_OBJECT_MAP_IO,
+	NVKM_OBJECT_MAP_VA
+};
+
 struct nvkm_object_func {
 	void *(*dtor)(struct nvkm_object *);
 	int (*init)(struct nvkm_object *);
 	int (*fini)(struct nvkm_object *, bool suspend);
 	int (*mthd)(struct nvkm_object *, u32 mthd, void *data, u32 size);
 	int (*ntfy)(struct nvkm_object *, u32 mthd, struct nvkm_event **);
-	int (*map)(struct nvkm_object *, u64 *addr, u32 *size);
+	int (*map)(struct nvkm_object *, void *argv, u32 argc,
+		   enum nvkm_object_map *, u64 *addr, u64 *size);
 	int (*rd08)(struct nvkm_object *, u64 addr, u8 *data);
 	int (*rd16)(struct nvkm_object *, u64 addr, u16 *data);
 	int (*rd32)(struct nvkm_object *, u64 addr, u32 *data);
@@ -50,7 +56,8 @@ int nvkm_object_init(struct nvkm_object *);
 int nvkm_object_fini(struct nvkm_object *, bool suspend);
 int nvkm_object_mthd(struct nvkm_object *, u32 mthd, void *data, u32 size);
 int nvkm_object_ntfy(struct nvkm_object *, u32 mthd, struct nvkm_event **);
-int nvkm_object_map(struct nvkm_object *, u64 *addr, u32 *size);
+int nvkm_object_map(struct nvkm_object *, void *argv, u32 argc,
+		    enum nvkm_object_map *, u64 *addr, u64 *size);
 int nvkm_object_rd08(struct nvkm_object *, u64 addr, u8  *data);
 int nvkm_object_rd16(struct nvkm_object *, u64 addr, u16 *data);
 int nvkm_object_rd32(struct nvkm_object *, u64 addr, u32 *data);

drivers/gpu/drm/nouveau/nouveau_chan.c

@@ -318,7 +318,7 @@ nouveau_channel_init(struct nouveau_channel *chan, u32 vram, u32 gart)
 	struct nv_dma_v0 args = {};
 	int ret, i;
 
-	nvif_object_map(&chan->user);
+	nvif_object_map(&chan->user, NULL, 0);
 
 	if (chan->user.oclass >= FERMI_CHANNEL_GPFIFO) {
 		ret = nvif_notify_init(&chan->user, nouveau_channel_killed,

drivers/gpu/drm/nouveau/nv50_display.c

@@ -318,7 +318,7 @@ nv50_chan_create(struct nvif_device *device, struct nvif_object *disp,
 				ret = nvif_object_init(disp, 0, oclass[0],
 						       data, size, &chan->user);
 				if (ret == 0)
-					nvif_object_map(&chan->user);
+					nvif_object_map(&chan->user, NULL, 0);
 				nvif_object_sclass_put(&sclass);
 				return ret;
 			}

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

@@ -165,47 +165,78 @@ nvif_object_mthd(struct nvif_object *object, u32 mthd, void *data, u32 size)
 	return ret;
 }
 
+void
+nvif_object_unmap_handle(struct nvif_object *object)
+{
+	struct {
+		struct nvif_ioctl_v0 ioctl;
+		struct nvif_ioctl_unmap unmap;
+	} args = {
+		.ioctl.type = NVIF_IOCTL_V0_UNMAP,
+	};
+
+	nvif_object_ioctl(object, &args, sizeof(args), NULL);
+}
+
+int
+nvif_object_map_handle(struct nvif_object *object, void *argv, u32 argc,
+		       u64 *handle, u64 *length)
+{
+	struct {
+		struct nvif_ioctl_v0 ioctl;
+		struct nvif_ioctl_map_v0 map;
+	} *args;
+	u32 argn = sizeof(*args) + argc;
+	int ret, maptype;
+
+	if (!(args = kzalloc(argn, GFP_KERNEL)))
+		return -ENOMEM;
+	args->ioctl.type = NVIF_IOCTL_V0_MAP;
+	memcpy(args->map.data, argv, argc);
+
+	ret = nvif_object_ioctl(object, args, argn, NULL);
+	*handle = args->map.handle;
+	*length = args->map.length;
+	maptype = args->map.type;
+	kfree(args);
+	return ret ? ret : (maptype == NVIF_IOCTL_MAP_V0_IO);
+}
+
 void
 nvif_object_unmap(struct nvif_object *object)
 {
-	if (object->map.size) {
-		struct nvif_client *client = object->client;
-		struct {
-			struct nvif_ioctl_v0 ioctl;
-			struct nvif_ioctl_unmap unmap;
-		} args = {
-			.ioctl.type = NVIF_IOCTL_V0_UNMAP,
-		};
-
-		if (object->map.ptr) {
+	struct nvif_client *client = object->client;
+	if (object->map.ptr) {
+		if (object->map.size) {
 			client->driver->unmap(client, object->map.ptr,
 						      object->map.size);
-			object->map.ptr = NULL;
+			object->map.size = 0;
 		}
-
-		nvif_object_ioctl(object, &args, sizeof(args), NULL);
-		object->map.size = 0;
+		object->map.ptr = NULL;
+		nvif_object_unmap_handle(object);
 	}
 }
 
 int
-nvif_object_map(struct nvif_object *object)
+nvif_object_map(struct nvif_object *object, void *argv, u32 argc)
 {
 	struct nvif_client *client = object->client;
-	struct {
-		struct nvif_ioctl_v0 ioctl;
-		struct nvif_ioctl_map_v0 map;
-	} args = {
-		.ioctl.type = NVIF_IOCTL_V0_MAP,
-	};
-	int ret = nvif_object_ioctl(object, &args, sizeof(args), NULL);
-	if (ret == 0) {
-		object->map.size = args.map.length;
-		object->map.ptr = client->driver->map(client, args.map.handle,
-						      object->map.size);
-		if (ret = -ENOMEM, object->map.ptr)
+	u64 handle, length;
+	int ret = nvif_object_map_handle(object, argv, argc, &handle, &length);
+	if (ret >= 0) {
+		if (ret) {
+			object->map.ptr = client->driver->map(client,
+							      handle,
+							      length);
+			if (ret = -ENOMEM, object->map.ptr) {
+				object->map.size = length;
+				return 0;
+			}
+		} else {
+			object->map.ptr = (void *)(unsigned long)handle;
 			return 0;
-		nvif_object_unmap(object);
+		}
+		nvif_object_unmap_handle(object);
 	}
 	return ret;
 }

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

@@ -257,13 +257,19 @@ nvkm_ioctl_map(struct nvkm_client *client,
 	union {
 		struct nvif_ioctl_map_v0 v0;
 	} *args = data;
+	enum nvkm_object_map type;
 	int ret = -ENOSYS;
 
 	nvif_ioctl(object, "map size %d\n", size);
-	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
+	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, true))) {
 		nvif_ioctl(object, "map vers %d\n", args->v0.version);
-		ret = nvkm_object_map(object, &args->v0.handle,
-					      &args->v0.length);
+		ret = nvkm_object_map(object, data, size, &type,
+				      &args->v0.handle,
+				      &args->v0.length);
+		if (type == NVKM_OBJECT_MAP_IO)
+			args->v0.type = NVIF_IOCTL_MAP_V0_IO;
+		else
+			args->v0.type = NVIF_IOCTL_MAP_V0_VA;
 	}
 
 	return ret;

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

@@ -102,10 +102,11 @@ nvkm_object_ntfy(struct nvkm_object *object, u32 mthd,
 }
 
 int
-nvkm_object_map(struct nvkm_object *object, u64 *addr, u32 *size)
+nvkm_object_map(struct nvkm_object *object, void *argv, u32 argc,
+		enum nvkm_object_map *type, u64 *addr, u64 *size)
 {
 	if (likely(object->func->map))
-		return object->func->map(object, addr, size);
+		return object->func->map(object, argv, argc, type, addr, size);
 	return -ENODEV;
 }
 

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

@@ -37,9 +37,11 @@ nvkm_oproxy_ntfy(struct nvkm_object *object, u32 mthd,
 }
 
 static int
-nvkm_oproxy_map(struct nvkm_object *object, u64 *addr, u32 *size)
+nvkm_oproxy_map(struct nvkm_object *object, void *argv, u32 argc,
+		enum nvkm_object_map *type, u64 *addr, u64 *size)
 {
-	return nvkm_object_map(nvkm_oproxy(object)->object, addr, size);
+	struct nvkm_oproxy *oproxy = nvkm_oproxy(object);
+	return nvkm_object_map(oproxy->object, argv, argc, type, addr, size);
 }
 
 static int

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

@@ -206,10 +206,12 @@ nvkm_udevice_wr32(struct nvkm_object *object, u64 addr, u32 data)
 }
 
 static int
-nvkm_udevice_map(struct nvkm_object *object, u64 *addr, u32 *size)
+nvkm_udevice_map(struct nvkm_object *object, void *argv, u32 argc,
+		 enum nvkm_object_map *type, u64 *addr, u64 *size)
 {
 	struct nvkm_udevice *udev = nvkm_udevice(object);
 	struct nvkm_device *device = udev->device;
+	*type = NVKM_OBJECT_MAP_IO;
 	*addr = device->func->resource_addr(device, 0);
 	*size = device->func->resource_size(device, 0);
 	return 0;

drivers/gpu/drm/nouveau/nvkm/engine/disp/channv50.c

@@ -191,11 +191,13 @@ nv50_disp_chan_ntfy(struct nvkm_object *object, u32 type,
 }
 
 static int
-nv50_disp_chan_map(struct nvkm_object *object, u64 *addr, u32 *size)
+nv50_disp_chan_map(struct nvkm_object *object, void *argv, u32 argc,
+		   enum nvkm_object_map *type, u64 *addr, u64 *size)
 {
 	struct nv50_disp_chan *chan = nv50_disp_chan(object);
 	struct nv50_disp *disp = chan->root->disp;
 	struct nvkm_device *device = disp->base.engine.subdev.device;
+	*type = NVKM_OBJECT_MAP_IO;
 	*addr = device->func->resource_addr(device, 0) +
 		0x640000 + (chan->chid.user * 0x1000);
 	*size = 0x001000;

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

@@ -253,9 +253,11 @@ nvkm_fifo_chan_ntfy(struct nvkm_object *object, u32 type,
 }
 
 static int
-nvkm_fifo_chan_map(struct nvkm_object *object, u64 *addr, u32 *size)
+nvkm_fifo_chan_map(struct nvkm_object *object, void *argv, u32 argc,
+		   enum nvkm_object_map *type, u64 *addr, u64 *size)
 {
 	struct nvkm_fifo_chan *chan = nvkm_fifo_chan(object);
+	*type = NVKM_OBJECT_MAP_IO;
 	*addr = chan->addr;
 	*size = chan->size;
 	return 0;