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1/*2 * Copyright 2012 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Ben Skeggs23 */24#include "priv.h"25 26#include <core/client.h>27#include <engine/fifo.h>28 29#include <nvif/class.h>30 31static int32nvkm_dma_oclass_new(struct nvkm_device *device,33 const struct nvkm_oclass *oclass, void *data, u32 size,34 struct nvkm_object **pobject)35{36 struct nvkm_dma *dma = nvkm_dma(oclass->engine);37 struct nvkm_dmaobj *dmaobj = NULL;38 int ret;39 40 ret = dma->func->class_new(dma, oclass, data, size, &dmaobj);41 if (dmaobj)42 *pobject = &dmaobj->object;43 return ret;44}45 46static const struct nvkm_device_oclass47nvkm_dma_oclass_base = {48 .ctor = nvkm_dma_oclass_new,49};50 51static int52nvkm_dma_oclass_fifo_new(const struct nvkm_oclass *oclass, void *data, u32 size,53 struct nvkm_object **pobject)54{55 return nvkm_dma_oclass_new(oclass->engine->subdev.device,56 oclass, data, size, pobject);57}58 59static const struct nvkm_sclass60nvkm_dma_sclass[] = {61 { 0, 0, NV_DMA_FROM_MEMORY, NULL, nvkm_dma_oclass_fifo_new },62 { 0, 0, NV_DMA_TO_MEMORY, NULL, nvkm_dma_oclass_fifo_new },63 { 0, 0, NV_DMA_IN_MEMORY, NULL, nvkm_dma_oclass_fifo_new },64};65 66static int67nvkm_dma_oclass_base_get(struct nvkm_oclass *sclass, int index,68 const struct nvkm_device_oclass **class)69{70 const int count = ARRAY_SIZE(nvkm_dma_sclass);71 if (index < count) {72 const struct nvkm_sclass *oclass = &nvkm_dma_sclass[index];73 sclass->base = oclass[0];74 sclass->engn = oclass;75 *class = &nvkm_dma_oclass_base;76 return index;77 }78 return count;79}80 81static int82nvkm_dma_oclass_fifo_get(struct nvkm_oclass *oclass, int index)83{84 const int count = ARRAY_SIZE(nvkm_dma_sclass);85 if (index < count) {86 oclass->base = nvkm_dma_sclass[index];87 return index;88 }89 return count;90}91 92static void *93nvkm_dma_dtor(struct nvkm_engine *engine)94{95 return nvkm_dma(engine);96}97 98static const struct nvkm_engine_func99nvkm_dma = {100 .dtor = nvkm_dma_dtor,101 .base.sclass = nvkm_dma_oclass_base_get,102 .fifo.sclass = nvkm_dma_oclass_fifo_get,103};104 105int106nvkm_dma_new_(const struct nvkm_dma_func *func, struct nvkm_device *device,107 enum nvkm_subdev_type type, int inst, struct nvkm_dma **pdma)108{109 struct nvkm_dma *dma;110 111 if (!(dma = *pdma = kzalloc(sizeof(*dma), GFP_KERNEL)))112 return -ENOMEM;113 dma->func = func;114 115 return nvkm_engine_ctor(&nvkm_dma, device, type, inst, true, &dma->engine);116}117