base.c

  1/*
  2 * Copyright 2012 Red Hat Inc.
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the "Software"),
  6 * to deal in the Software without restriction, including without limitation
  7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8 * and/or sell copies of the Software, and to permit persons to whom the
  9 * Software is furnished to do so, subject to the following conditions:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 18 * 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 OR
 20 * OTHER DEALINGS IN THE SOFTWARE.
 21 *
 22 * Authors: Ben Skeggs
 23 */
 24#include "priv.h"
 25
 26#include <core/client.h>
 27#include <engine/fifo.h>
 28
 29#include <nvif/class.h>
 30
 31static int
 32nvkm_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_oclass
 47nvkm_dma_oclass_base = {
 48	.ctor = nvkm_dma_oclass_new,
 49};
 50
 51static int
 52nvkm_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_sclass
 60nvkm_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 int
 67nvkm_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 int
 82nvkm_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_func
 99nvkm_dma = {
100	.dtor = nvkm_dma_dtor,
101	.base.sclass = nvkm_dma_oclass_base_get,
102	.fifo.sclass = nvkm_dma_oclass_fifo_get,
103};
104
105int
106nvkm_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}