1/* $NetBSD: nouveau_nvkm_engine_dma_base.c,v 1.5 2021/12/18 23:45:35 riastradh Exp $ */ 2 3/* 4 * Copyright 2012 Red Hat Inc. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 * 24 * Authors: Ben Skeggs 25 */ 26#include <sys/cdefs.h> 27__KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_dma_base.c,v 1.5 2021/12/18 23:45:35 riastradh Exp $"); 28 29#include "priv.h" 30 31#include <core/client.h> 32#include <engine/fifo.h> 33 34#include <nvif/class.h> 35 36static int 37nvkm_dma_oclass_new(struct nvkm_device *device, 38 const struct nvkm_oclass *oclass, void *data, u32 size, 39 struct nvkm_object **pobject) 40{ 41 struct nvkm_dma *dma = nvkm_dma(oclass->engine); 42 struct nvkm_dmaobj *dmaobj = NULL; 43 int ret; 44 45 ret = dma->func->class_new(dma, oclass, data, size, &dmaobj); 46 if (dmaobj) 47 *pobject = &dmaobj->object; 48 return ret; 49} 50 51static const struct nvkm_device_oclass 52nvkm_dma_oclass_base = { 53 .ctor = nvkm_dma_oclass_new, 54}; 55 56static int 57nvkm_dma_oclass_fifo_new(const struct nvkm_oclass *oclass, void *data, u32 size, 58 struct nvkm_object **pobject) 59{ 60 return nvkm_dma_oclass_new(oclass->engine->subdev.device, 61 oclass, data, size, pobject); 62} 63 64static const struct nvkm_sclass 65nvkm_dma_sclass[] = { 66 { 0, 0, NV_DMA_FROM_MEMORY, NULL, nvkm_dma_oclass_fifo_new }, 67 { 0, 0, NV_DMA_TO_MEMORY, NULL, nvkm_dma_oclass_fifo_new }, 68 { 0, 0, NV_DMA_IN_MEMORY, NULL, nvkm_dma_oclass_fifo_new }, 69}; 70 71static int 72nvkm_dma_oclass_base_get(struct nvkm_oclass *sclass, int index, 73 const struct nvkm_device_oclass **class) 74{ 75 const int count = ARRAY_SIZE(nvkm_dma_sclass); 76 if (index < count) { 77 const struct nvkm_sclass *oclass = &nvkm_dma_sclass[index]; 78 sclass->base = oclass[0]; 79 sclass->engn = oclass; 80 *class = &nvkm_dma_oclass_base; 81 return index; 82 } 83 return count; 84} 85 86static int 87nvkm_dma_oclass_fifo_get(struct nvkm_oclass *oclass, int index) 88{ 89 const int count = ARRAY_SIZE(nvkm_dma_sclass); 90 if (index < count) { 91 oclass->base = nvkm_dma_sclass[index]; 92 return index; 93 } 94 return count; 95} 96 97static void * 98nvkm_dma_dtor(struct nvkm_engine *engine) 99{ 100 return nvkm_dma(engine); 101} 102 103static const struct nvkm_engine_func 104nvkm_dma = { 105 .dtor = nvkm_dma_dtor, 106 .base.sclass = nvkm_dma_oclass_base_get, 107 .fifo.sclass = nvkm_dma_oclass_fifo_get, 108}; 109 110int 111nvkm_dma_new_(const struct nvkm_dma_func *func, struct nvkm_device *device, 112 int index, struct nvkm_dma **pdma) 113{ 114 struct nvkm_dma *dma; 115 116 if (!(dma = *pdma = kzalloc(sizeof(*dma), GFP_KERNEL))) 117 return -ENOMEM; 118 dma->func = func; 119 120 return nvkm_engine_ctor(&nvkm_dma, device, index, true, &dma->engine); 121} 122