drivers/gpu/drm/nouveau/nvkm/engine/falcon.c - linux - Git at Google

 /*
  * Copyright 2012 Red Hat Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  * OTHER DEALINGS IN THE SOFTWARE.
  */
 #include <engine/falcon.h>

 #include <core/gpuobj.h>
 #include <subdev/mc.h>
 #include <subdev/timer.h>
 #include <engine/fifo.h>

 static int
 nvkm_falcon_oclass_get(struct nvkm_oclass *oclass, int index)
 {
 	struct nvkm_falcon *falcon = nvkm_falcon(oclass->engine);
 	int c = 0;

 	while (falcon->func->sclass[c].oclass) {
 		if (c++ == index) {
 			oclass->base = falcon->func->sclass[index];
 			return index;
 		}
 	}

 	return c;
 }

 static int
 nvkm_falcon_cclass_bind(struct nvkm_object *object, struct nvkm_gpuobj *parent,
 			int align, struct nvkm_gpuobj **pgpuobj)
 {
 	return nvkm_gpuobj_new(object->engine->subdev.device, 256,
 			       align, true, parent, pgpuobj);
 }

 static const struct nvkm_object_func
 nvkm_falcon_cclass = {
 	.bind = nvkm_falcon_cclass_bind,
 };

 static void
 nvkm_falcon_intr(struct nvkm_engine *engine)
 {
 	struct nvkm_falcon *falcon = nvkm_falcon(engine);
 	struct nvkm_subdev *subdev = &falcon->engine.subdev;
 	struct nvkm_device *device = subdev->device;
 	const u32 base = falcon->addr;
 	u32 dest = nvkm_rd32(device, base + 0x01c);
 	u32 intr = nvkm_rd32(device, base + 0x008) & dest & ~(dest >> 16);
 	u32 inst = nvkm_rd32(device, base + 0x050) & 0x3fffffff;
 	struct nvkm_fifo_chan *chan;
 	unsigned long flags;

 	chan = nvkm_fifo_chan_inst(device->fifo, (u64)inst << 12, &flags);

 	if (intr & 0x00000040) {
 		if (falcon->func->intr) {
 			falcon->func->intr(falcon, chan);
 			nvkm_wr32(device, base + 0x004, 0x00000040);
 			intr &= ~0x00000040;
 		}
 	}

 	if (intr & 0x00000010) {
 		nvkm_debug(subdev, "ucode halted\n");
 		nvkm_wr32(device, base + 0x004, 0x00000010);
 		intr &= ~0x00000010;
 	}

 	if (intr)  {
 		nvkm_error(subdev, "intr %08x\n", intr);
 		nvkm_wr32(device, base + 0x004, intr);
 	}

 	nvkm_fifo_chan_put(device->fifo, flags, &chan);
 }

 static int
 nvkm_falcon_fini(struct nvkm_engine *engine, bool suspend)
 {
 	struct nvkm_falcon *falcon = nvkm_falcon(engine);
 	struct nvkm_device *device = falcon->engine.subdev.device;
 	const u32 base = falcon->addr;

 	if (!suspend) {
 		nvkm_memory_unref(&falcon->core);
 		if (falcon->external) {
 			vfree(falcon->data.data);
 			vfree(falcon->code.data);
 			falcon->code.data = NULL;
 		}
 	}

 	if (nvkm_mc_enabled(device, engine->subdev.type, engine->subdev.inst)) {
 		nvkm_mask(device, base + 0x048, 0x00000003, 0x00000000);
 		nvkm_wr32(device, base + 0x014, 0xffffffff);
 	}
 	return 0;
 }

 static void *
 vmemdup(const void *src, size_t len)
 {
 	void *p = vmalloc(len);

 	if (p)
 		memcpy(p, src, len);
 	return p;
 }

 static int
 nvkm_falcon_oneinit(struct nvkm_engine *engine)
 {
 	struct nvkm_falcon *falcon = nvkm_falcon(engine);
 	struct nvkm_subdev *subdev = &falcon->engine.subdev;
 	struct nvkm_device *device = subdev->device;
 	const u32 base = falcon->addr;
 	u32 caps;

 	/* determine falcon capabilities */
 	if (device->chipset <  0xa3 ||
 	    device->chipset == 0xaa || device->chipset == 0xac) {
 		falcon->version = 0;
 		falcon->secret  = (falcon->addr == 0x087000) ? 1 : 0;
 	} else {
 		caps = nvkm_rd32(device, base + 0x12c);
 		falcon->version = (caps & 0x0000000f);
 		falcon->secret  = (caps & 0x00000030) >> 4;
 	}

 	caps = nvkm_rd32(device, base + 0x108);
 	falcon->code.limit = (caps & 0x000001ff) << 8;
 	falcon->data.limit = (caps & 0x0003fe00) >> 1;

 	nvkm_debug(subdev, "falcon version: %d\n", falcon->version);
 	nvkm_debug(subdev, "secret level: %d\n", falcon->secret);
 	nvkm_debug(subdev, "code limit: %d\n", falcon->code.limit);
 	nvkm_debug(subdev, "data limit: %d\n", falcon->data.limit);
 	return 0;
 }

 static int
 nvkm_falcon_init(struct nvkm_engine *engine)
 {
 	struct nvkm_falcon *falcon = nvkm_falcon(engine);
 	struct nvkm_subdev *subdev = &falcon->engine.subdev;
 	struct nvkm_device *device = subdev->device;
 	const struct firmware *fw;
 	char name[32] = "internal";
 	const u32 base = falcon->addr;
 	int ret, i;

 	/* wait for 'uc halted' to be signalled before continuing */
 	if (falcon->secret && falcon->version < 4) {
 		if (!falcon->version) {
 			nvkm_msec(device, 2000,
 				if (nvkm_rd32(device, base + 0x008) & 0x00000010)
 					break;
 			);
 		} else {
 			nvkm_msec(device, 2000,
 				if (!(nvkm_rd32(device, base + 0x180) & 0x80000000))
 					break;
 			);
 		}
 		nvkm_wr32(device, base + 0x004, 0x00000010);
 	}

 	/* disable all interrupts */
 	nvkm_wr32(device, base + 0x014, 0xffffffff);

 	/* no default ucode provided by the engine implementation, try and
 	 * locate a "self-bootstrapping" firmware image for the engine
 	 */
 	if (!falcon->code.data) {
 		snprintf(name, sizeof(name), "nouveau/nv%02x_fuc%03x",
 			 device->chipset, falcon->addr >> 12);

 		ret = request_firmware(&fw, name, device->dev);
 		if (ret == 0) {
 			falcon->code.data = vmemdup(fw->data, fw->size);
 			falcon->code.size = fw->size;
 			falcon->data.data = NULL;
 			falcon->data.size = 0;
 			release_firmware(fw);
 		}

 		falcon->external = true;
 	}

 	/* next step is to try and load "static code/data segment" firmware
 	 * images for the engine
 	 */
 	if (!falcon->code.data) {
 		snprintf(name, sizeof(name), "nouveau/nv%02x_fuc%03xd",
 			 device->chipset, falcon->addr >> 12);

 		ret = request_firmware(&fw, name, device->dev);
 		if (ret) {
 			nvkm_error(subdev, "unable to load firmware data\n");
 			return -ENODEV;
 		}

 		falcon->data.data = vmemdup(fw->data, fw->size);
 		falcon->data.size = fw->size;
 		release_firmware(fw);
 		if (!falcon->data.data)
 			return -ENOMEM;

 		snprintf(name, sizeof(name), "nouveau/nv%02x_fuc%03xc",
 			 device->chipset, falcon->addr >> 12);

 		ret = request_firmware(&fw, name, device->dev);
 		if (ret) {
 			nvkm_error(subdev, "unable to load firmware code\n");
 			return -ENODEV;
 		}

 		falcon->code.data = vmemdup(fw->data, fw->size);
 		falcon->code.size = fw->size;
 		release_firmware(fw);
 		if (!falcon->code.data)
 			return -ENOMEM;
 	}

 	nvkm_debug(subdev, "firmware: %s (%s)\n", name, falcon->data.data ?
 		   "static code/data segments" : "self-bootstrapping");

 	/* ensure any "self-bootstrapping" firmware image is in vram */
 	if (!falcon->data.data && !falcon->core) {
 		ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST,
 				      falcon->code.size, 256, false,
 				      &falcon->core);
 		if (ret) {
 			nvkm_error(subdev, "core allocation failed, %d\n", ret);
 			return ret;
 		}

 		nvkm_kmap(falcon->core);
 		for (i = 0; i < falcon->code.size; i += 4)
 			nvkm_wo32(falcon->core, i, falcon->code.data[i / 4]);
 		nvkm_done(falcon->core);
 	}

 	/* upload firmware bootloader (or the full code segments) */
 	if (falcon->core) {
 		u64 addr = nvkm_memory_addr(falcon->core);
 		if (device->card_type < NV_C0)
 			nvkm_wr32(device, base + 0x618, 0x04000000);
 		else
 			nvkm_wr32(device, base + 0x618, 0x00000114);
 		nvkm_wr32(device, base + 0x11c, 0);
 		nvkm_wr32(device, base + 0x110, addr >> 8);
 		nvkm_wr32(device, base + 0x114, 0);
 		nvkm_wr32(device, base + 0x118, 0x00006610);
 	} else {
 		if (falcon->code.size > falcon->code.limit ||
 		    falcon->data.size > falcon->data.limit) {
 			nvkm_error(subdev, "ucode exceeds falcon limit(s)\n");
 			return -EINVAL;
 		}

 		if (falcon->version < 3) {
 			nvkm_wr32(device, base + 0xff8, 0x00100000);
 			for (i = 0; i < falcon->code.size / 4; i++)
 				nvkm_wr32(device, base + 0xff4, falcon->code.data[i]);
 		} else {
 			nvkm_wr32(device, base + 0x180, 0x01000000);
 			for (i = 0; i < falcon->code.size / 4; i++) {
 				if ((i & 0x3f) == 0)
 					nvkm_wr32(device, base + 0x188, i >> 6);
 				nvkm_wr32(device, base + 0x184, falcon->code.data[i]);
 			}
 		}
 	}

 	/* upload data segment (if necessary), zeroing the remainder */
 	if (falcon->version < 3) {
 		nvkm_wr32(device, base + 0xff8, 0x00000000);
 		for (i = 0; !falcon->core && i < falcon->data.size / 4; i++)
 			nvkm_wr32(device, base + 0xff4, falcon->data.data[i]);
 		for (; i < falcon->data.limit; i += 4)
 			nvkm_wr32(device, base + 0xff4, 0x00000000);
 	} else {
 		nvkm_wr32(device, base + 0x1c0, 0x01000000);
 		for (i = 0; !falcon->core && i < falcon->data.size / 4; i++)
 			nvkm_wr32(device, base + 0x1c4, falcon->data.data[i]);
 		for (; i < falcon->data.limit / 4; i++)
 			nvkm_wr32(device, base + 0x1c4, 0x00000000);
 	}

 	/* start it running */
 	nvkm_wr32(device, base + 0x10c, 0x00000001); /* BLOCK_ON_FIFO */
 	nvkm_wr32(device, base + 0x104, 0x00000000); /* ENTRY */
 	nvkm_wr32(device, base + 0x100, 0x00000002); /* TRIGGER */
 	nvkm_wr32(device, base + 0x048, 0x00000003); /* FIFO | CHSW */

 	if (falcon->func->init)
 		falcon->func->init(falcon);
 	return 0;
 }

 static void *
 nvkm_falcon_dtor(struct nvkm_engine *engine)
 {
 	return nvkm_falcon(engine);
 }

 static const struct nvkm_engine_func
 nvkm_falcon = {
 	.dtor = nvkm_falcon_dtor,
 	.oneinit = nvkm_falcon_oneinit,
 	.init = nvkm_falcon_init,
 	.fini = nvkm_falcon_fini,
 	.intr = nvkm_falcon_intr,
 	.fifo.sclass = nvkm_falcon_oclass_get,
 	.cclass = &nvkm_falcon_cclass,
 };

 int
 nvkm_falcon_new_(const struct nvkm_falcon_func *func, struct nvkm_device *device,
 		 enum nvkm_subdev_type type, int inst, bool enable, u32 addr,
 		 struct nvkm_engine **pengine)
 {
 	struct nvkm_falcon *falcon;

 	if (!(falcon = kzalloc(sizeof(*falcon), GFP_KERNEL)))
 		return -ENOMEM;
 	falcon->func = func;
 	falcon->addr = addr;
 	falcon->code.data = func->code.data;
 	falcon->code.size = func->code.size;
 	falcon->data.data = func->data.data;
 	falcon->data.size = func->data.size;
 	*pengine = &falcon->engine;

 	return nvkm_engine_ctor(&nvkm_falcon, device, type, inst, enable, &falcon->engine);
 }
	/*
	* Copyright 2012 Red Hat Inc.
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* and/or sell copies of the Software, and to permit persons to whom the
	* Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	* OTHER DEALINGS IN THE SOFTWARE.
	*/
	#include <engine/falcon.h>

	#include <core/gpuobj.h>
	#include <subdev/mc.h>
	#include <subdev/timer.h>
	#include <engine/fifo.h>

	static int
	nvkm_falcon_oclass_get(struct nvkm_oclass *oclass, int index)
	{
	struct nvkm_falcon *falcon = nvkm_falcon(oclass->engine);
	int c = 0;

	while (falcon->func->sclass[c].oclass) {
	if (c++ == index) {
	oclass->base = falcon->func->sclass[index];
	return index;
	}
	}

	return c;
	}

	static int
	nvkm_falcon_cclass_bind(struct nvkm_object object, struct nvkm_gpuobj parent,
	int align, struct nvkm_gpuobj **pgpuobj)
	{
	return nvkm_gpuobj_new(object->engine->subdev.device, 256,
	align, true, parent, pgpuobj);
	}

	static const struct nvkm_object_func
	nvkm_falcon_cclass = {
	.bind = nvkm_falcon_cclass_bind,
	};

	static void
	nvkm_falcon_intr(struct nvkm_engine *engine)
	{
	struct nvkm_falcon *falcon = nvkm_falcon(engine);
	struct nvkm_subdev *subdev = &falcon->engine.subdev;
	struct nvkm_device *device = subdev->device;
	const u32 base = falcon->addr;
	u32 dest = nvkm_rd32(device, base + 0x01c);
	u32 intr = nvkm_rd32(device, base + 0x008) & dest & ~(dest >> 16);
	u32 inst = nvkm_rd32(device, base + 0x050) & 0x3fffffff;
	struct nvkm_fifo_chan *chan;
	unsigned long flags;

	chan = nvkm_fifo_chan_inst(device->fifo, (u64)inst << 12, &flags);

	if (intr & 0x00000040) {
	if (falcon->func->intr) {
	falcon->func->intr(falcon, chan);
	nvkm_wr32(device, base + 0x004, 0x00000040);
	intr &= ~0x00000040;
	}
	}

	if (intr & 0x00000010) {
	nvkm_debug(subdev, "ucode halted\n");
	nvkm_wr32(device, base + 0x004, 0x00000010);
	intr &= ~0x00000010;
	}

	if (intr) {
	nvkm_error(subdev, "intr %08x\n", intr);
	nvkm_wr32(device, base + 0x004, intr);
	}

	nvkm_fifo_chan_put(device->fifo, flags, &chan);
	}

	static int
	nvkm_falcon_fini(struct nvkm_engine *engine, bool suspend)
	{
	struct nvkm_falcon *falcon = nvkm_falcon(engine);
	struct nvkm_device *device = falcon->engine.subdev.device;
	const u32 base = falcon->addr;

	if (!suspend) {
	nvkm_memory_unref(&falcon->core);
	if (falcon->external) {
	vfree(falcon->data.data);
	vfree(falcon->code.data);
	falcon->code.data = NULL;
	}
	}

	if (nvkm_mc_enabled(device, engine->subdev.type, engine->subdev.inst)) {
	nvkm_mask(device, base + 0x048, 0x00000003, 0x00000000);
	nvkm_wr32(device, base + 0x014, 0xffffffff);
	}
	return 0;
	}

	static void *
	vmemdup(const void *src, size_t len)
	{
	void *p = vmalloc(len);

	if (p)
	memcpy(p, src, len);
	return p;
	}

	static int
	nvkm_falcon_oneinit(struct nvkm_engine *engine)
	{
	struct nvkm_falcon *falcon = nvkm_falcon(engine);
	struct nvkm_subdev *subdev = &falcon->engine.subdev;
	struct nvkm_device *device = subdev->device;
	const u32 base = falcon->addr;
	u32 caps;

	/* determine falcon capabilities */
	if (device->chipset < 0xa3 \|\|
	device->chipset == 0xaa \|\| device->chipset == 0xac) {
	falcon->version = 0;
	falcon->secret = (falcon->addr == 0x087000) ? 1 : 0;
	} else {
	caps = nvkm_rd32(device, base + 0x12c);
	falcon->version = (caps & 0x0000000f);
	falcon->secret = (caps & 0x00000030) >> 4;
	}

	caps = nvkm_rd32(device, base + 0x108);
	falcon->code.limit = (caps & 0x000001ff) << 8;
	falcon->data.limit = (caps & 0x0003fe00) >> 1;

	nvkm_debug(subdev, "falcon version: %d\n", falcon->version);
	nvkm_debug(subdev, "secret level: %d\n", falcon->secret);
	nvkm_debug(subdev, "code limit: %d\n", falcon->code.limit);
	nvkm_debug(subdev, "data limit: %d\n", falcon->data.limit);
	return 0;
	}

	static int
	nvkm_falcon_init(struct nvkm_engine *engine)
	{
	struct nvkm_falcon *falcon = nvkm_falcon(engine);
	struct nvkm_subdev *subdev = &falcon->engine.subdev;
	struct nvkm_device *device = subdev->device;
	const struct firmware *fw;
	char name[32] = "internal";
	const u32 base = falcon->addr;
	int ret, i;

	/* wait for 'uc halted' to be signalled before continuing */
	if (falcon->secret && falcon->version < 4) {
	if (!falcon->version) {
	nvkm_msec(device, 2000,
	if (nvkm_rd32(device, base + 0x008) & 0x00000010)
	break;
	);
	} else {
	nvkm_msec(device, 2000,
	if (!(nvkm_rd32(device, base + 0x180) & 0x80000000))
	break;
	);
	}
	nvkm_wr32(device, base + 0x004, 0x00000010);
	}

	/* disable all interrupts */
	nvkm_wr32(device, base + 0x014, 0xffffffff);

	/* no default ucode provided by the engine implementation, try and
	* locate a "self-bootstrapping" firmware image for the engine
	*/
	if (!falcon->code.data) {
	snprintf(name, sizeof(name), "nouveau/nv%02x_fuc%03x",
	device->chipset, falcon->addr >> 12);

	ret = request_firmware(&fw, name, device->dev);
	if (ret == 0) {
	falcon->code.data = vmemdup(fw->data, fw->size);
	falcon->code.size = fw->size;
	falcon->data.data = NULL;
	falcon->data.size = 0;
	release_firmware(fw);
	}

	falcon->external = true;
	}

	/* next step is to try and load "static code/data segment" firmware
	* images for the engine
	*/
	if (!falcon->code.data) {
	snprintf(name, sizeof(name), "nouveau/nv%02x_fuc%03xd",
	device->chipset, falcon->addr >> 12);

	ret = request_firmware(&fw, name, device->dev);
	if (ret) {
	nvkm_error(subdev, "unable to load firmware data\n");
	return -ENODEV;
	}

	falcon->data.data = vmemdup(fw->data, fw->size);
	falcon->data.size = fw->size;
	release_firmware(fw);
	if (!falcon->data.data)
	return -ENOMEM;

	snprintf(name, sizeof(name), "nouveau/nv%02x_fuc%03xc",
	device->chipset, falcon->addr >> 12);

	ret = request_firmware(&fw, name, device->dev);
	if (ret) {
	nvkm_error(subdev, "unable to load firmware code\n");
	return -ENODEV;
	}

	falcon->code.data = vmemdup(fw->data, fw->size);
	falcon->code.size = fw->size;
	release_firmware(fw);
	if (!falcon->code.data)
	return -ENOMEM;
	}

	nvkm_debug(subdev, "firmware: %s (%s)\n", name, falcon->data.data ?
	"static code/data segments" : "self-bootstrapping");

	/* ensure any "self-bootstrapping" firmware image is in vram */
	if (!falcon->data.data && !falcon->core) {
	ret = nvkm_memory_new(device, NVKM_MEM_TARGET_INST,
	falcon->code.size, 256, false,
	&falcon->core);
	if (ret) {
	nvkm_error(subdev, "core allocation failed, %d\n", ret);
	return ret;
	}

	nvkm_kmap(falcon->core);
	for (i = 0; i < falcon->code.size; i += 4)
	nvkm_wo32(falcon->core, i, falcon->code.data[i / 4]);
	nvkm_done(falcon->core);
	}

	/* upload firmware bootloader (or the full code segments) */
	if (falcon->core) {
	u64 addr = nvkm_memory_addr(falcon->core);
	if (device->card_type < NV_C0)
	nvkm_wr32(device, base + 0x618, 0x04000000);
	else
	nvkm_wr32(device, base + 0x618, 0x00000114);
	nvkm_wr32(device, base + 0x11c, 0);
	nvkm_wr32(device, base + 0x110, addr >> 8);
	nvkm_wr32(device, base + 0x114, 0);
	nvkm_wr32(device, base + 0x118, 0x00006610);
	} else {
	if (falcon->code.size > falcon->code.limit \|\|
	falcon->data.size > falcon->data.limit) {
	nvkm_error(subdev, "ucode exceeds falcon limit(s)\n");
	return -EINVAL;
	}

	if (falcon->version < 3) {
	nvkm_wr32(device, base + 0xff8, 0x00100000);
	for (i = 0; i < falcon->code.size / 4; i++)
	nvkm_wr32(device, base + 0xff4, falcon->code.data[i]);
	} else {
	nvkm_wr32(device, base + 0x180, 0x01000000);
	for (i = 0; i < falcon->code.size / 4; i++) {
	if ((i & 0x3f) == 0)
	nvkm_wr32(device, base + 0x188, i >> 6);
	nvkm_wr32(device, base + 0x184, falcon->code.data[i]);
	}
	}
	}

	/* upload data segment (if necessary), zeroing the remainder */
	if (falcon->version < 3) {
	nvkm_wr32(device, base + 0xff8, 0x00000000);
	for (i = 0; !falcon->core && i < falcon->data.size / 4; i++)
	nvkm_wr32(device, base + 0xff4, falcon->data.data[i]);
	for (; i < falcon->data.limit; i += 4)
	nvkm_wr32(device, base + 0xff4, 0x00000000);
	} else {
	nvkm_wr32(device, base + 0x1c0, 0x01000000);
	for (i = 0; !falcon->core && i < falcon->data.size / 4; i++)
	nvkm_wr32(device, base + 0x1c4, falcon->data.data[i]);
	for (; i < falcon->data.limit / 4; i++)
	nvkm_wr32(device, base + 0x1c4, 0x00000000);
	}

	/* start it running */
	nvkm_wr32(device, base + 0x10c, 0x00000001); /* BLOCK_ON_FIFO */
	nvkm_wr32(device, base + 0x104, 0x00000000); /* ENTRY */
	nvkm_wr32(device, base + 0x100, 0x00000002); /* TRIGGER */
	nvkm_wr32(device, base + 0x048, 0x00000003); /* FIFO \| CHSW */

	if (falcon->func->init)
	falcon->func->init(falcon);
	return 0;
	}

	static void *
	nvkm_falcon_dtor(struct nvkm_engine *engine)
	{
	return nvkm_falcon(engine);
	}

	static const struct nvkm_engine_func
	nvkm_falcon = {
	.dtor = nvkm_falcon_dtor,
	.oneinit = nvkm_falcon_oneinit,
	.init = nvkm_falcon_init,
	.fini = nvkm_falcon_fini,
	.intr = nvkm_falcon_intr,
	.fifo.sclass = nvkm_falcon_oclass_get,
	.cclass = &nvkm_falcon_cclass,
	};

	int
	nvkm_falcon_new_(const struct nvkm_falcon_func func, struct nvkm_device device,
	enum nvkm_subdev_type type, int inst, bool enable, u32 addr,
	struct nvkm_engine **pengine)
	{
	struct nvkm_falcon *falcon;

	if (!(falcon = kzalloc(sizeof(*falcon), GFP_KERNEL)))
	return -ENOMEM;
	falcon->func = func;
	falcon->addr = addr;
	falcon->code.data = func->code.data;
	falcon->code.size = func->code.size;
	falcon->data.data = func->data.data;
	falcon->data.size = func->data.size;
	*pengine = &falcon->engine;

	return nvkm_engine_ctor(&nvkm_falcon, device, type, inst, enable, &falcon->engine);
	}