linux_kernel/drivers/gpu/drm/nouveau/nvkm/engine/dma/usergf119.c

/*
 * 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.
 *
 * Authors: Ben Skeggs
 */
#define gf119_dmaobj(p) container_of((p), struct gf119_dmaobj, base)
#include "user.h"

#include <core/client.h>
#include <core/gpuobj.h>
#include <subdev/fb.h>

#include <nvif/cl0002.h>
#include <nvif/unpack.h>

struct gf119_dmaobj {
	struct nvkm_dmaobj base;
	u32 flags0;
};

static int
gf119_dmaobj_bind(struct nvkm_dmaobj *base, struct nvkm_gpuobj *parent,
		  int align, struct nvkm_gpuobj **pgpuobj)
{
	struct gf119_dmaobj *dmaobj = gf119_dmaobj(base);
	struct nvkm_device *device = dmaobj->base.dma->engine.subdev.device;
	int ret;

	ret = nvkm_gpuobj_new(device, 24, align, false, parent, pgpuobj);
	if (ret == 0) {
		nvkm_kmap(*pgpuobj);
		nvkm_wo32(*pgpuobj, 0x00, dmaobj->flags0);
		nvkm_wo32(*pgpuobj, 0x04, dmaobj->base.start >> 8);
		nvkm_wo32(*pgpuobj, 0x08, dmaobj->base.limit >> 8);
		nvkm_wo32(*pgpuobj, 0x0c, 0x00000000);
		nvkm_wo32(*pgpuobj, 0x10, 0x00000000);
		nvkm_wo32(*pgpuobj, 0x14, 0x00000000);
		nvkm_done(*pgpuobj);
	}

	return ret;
}

static const struct nvkm_dmaobj_func
gf119_dmaobj_func = {
	.bind = gf119_dmaobj_bind,
};

int
gf119_dmaobj_new(struct nvkm_dma *dma, const struct nvkm_oclass *oclass,
		 void *data, u32 size, struct nvkm_dmaobj **pdmaobj)
{
	union {
		struct gf119_dma_v0 v0;
	} *args;
	struct nvkm_object *parent = oclass->parent;
	struct gf119_dmaobj *dmaobj;
	u32 kind, page;
	int ret;

	if (!(dmaobj = kzalloc(sizeof(*dmaobj), GFP_KERNEL)))
		return -ENOMEM;
	*pdmaobj = &dmaobj->base;

	ret = nvkm_dmaobj_ctor(&gf119_dmaobj_func, dma, oclass,
			       &data, &size, &dmaobj->base);
	if (ret)
		return ret;

	ret  = -ENOSYS;
	args = data;

	nvif_ioctl(parent, "create gf119 dma size %d\n", size);
	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
		nvif_ioctl(parent,
			   "create gf100 dma vers %d page %d kind %02x\n",
			   args->v0.version, args->v0.page, args->v0.kind);
		kind = args->v0.kind;
		page = args->v0.page;
	} else
	if (size == 0) {
		if (dmaobj->base.target != NV_MEM_TARGET_VM) {
			kind = GF119_DMA_V0_KIND_PITCH;
			page = GF119_DMA_V0_PAGE_SP;
		} else {
			kind = GF119_DMA_V0_KIND_VM;
			page = GF119_DMA_V0_PAGE_LP;
		}
	} else
		return ret;

	if (page > 1)
		return -EINVAL;
	dmaobj->flags0 = (kind << 20) | (page << 6);

	switch (dmaobj->base.target) {
	case NV_MEM_TARGET_VRAM:
		dmaobj->flags0 |= 0x00000009;
		break;
	case NV_MEM_TARGET_VM:
	case NV_MEM_TARGET_PCI:
	case NV_MEM_TARGET_PCI_NOSNOOP:
		/* XXX: don't currently know how to construct a real one
		 *      of these.  we only use them to represent pushbufs
		 *      on these chipsets, and the classes that use them
		 *      deal with the target themselves.
		 */
		break;
	default:
		return -EINVAL;
	}

	return 0;
}