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/*
* 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
*/
#include "priv.h"
#include <core/client.h>
#include <engine/fifo.h>
#include <nvif/class.h>
struct nvkm_dmaobj *
nvkm_dma_search(struct nvkm_dma *dma, struct nvkm_client *client, u64 object)
{
struct rb_node *node = client->dmaroot.rb_node;
while (node) {
struct nvkm_dmaobj *dmaobj =
container_of(node, typeof(*dmaobj), rb);
if (object < dmaobj->handle)
node = node->rb_left;
else
if (object > dmaobj->handle)
node = node->rb_right;
else
return dmaobj;
}
return NULL;
}
static int
nvkm_dma_oclass_new(struct nvkm_device *device,
const struct nvkm_oclass *oclass, void *data, u32 size,
struct nvkm_object **pobject)
{
struct nvkm_dma *dma = nvkm_dma(oclass->engine);
struct nvkm_dmaobj *dmaobj = NULL;
struct nvkm_client *client = oclass->client;
struct rb_node **ptr = &client->dmaroot.rb_node;
struct rb_node *parent = NULL;
int ret;
ret = dma->func->class_new(dma, oclass, data, size, &dmaobj);
if (dmaobj)
*pobject = &dmaobj->object;
if (ret)
return ret;
dmaobj->handle = oclass->object;
while (*ptr) {
struct nvkm_dmaobj *obj = container_of(*ptr, typeof(*obj), rb);
parent = *ptr;
if (dmaobj->handle < obj->handle)
ptr = &parent->rb_left;
else
if (dmaobj->handle > obj->handle)
ptr = &parent->rb_right;
else
return -EEXIST;
}
rb_link_node(&dmaobj->rb, parent, ptr);
rb_insert_color(&dmaobj->rb, &client->dmaroot);
return 0;
}
static const struct nvkm_device_oclass
nvkm_dma_oclass_base = {
.ctor = nvkm_dma_oclass_new,
};
static int
nvkm_dma_oclass_fifo_new(const struct nvkm_oclass *oclass, void *data, u32 size,
struct nvkm_object **pobject)
{
return nvkm_dma_oclass_new(oclass->engine->subdev.device,
oclass, data, size, pobject);
}
static const struct nvkm_sclass
nvkm_dma_sclass[] = {
{ 0, 0, NV_DMA_FROM_MEMORY, NULL, nvkm_dma_oclass_fifo_new },
{ 0, 0, NV_DMA_TO_MEMORY, NULL, nvkm_dma_oclass_fifo_new },
{ 0, 0, NV_DMA_IN_MEMORY, NULL, nvkm_dma_oclass_fifo_new },
};
static int
nvkm_dma_oclass_base_get(struct nvkm_oclass *sclass, int index,
const struct nvkm_device_oclass **class)
{
const int count = ARRAY_SIZE(nvkm_dma_sclass);
if (index < count) {
const struct nvkm_sclass *oclass = &nvkm_dma_sclass[index];
sclass->base = oclass[0];
sclass->engn = oclass;
*class = &nvkm_dma_oclass_base;
return index;
}
return count;
}
static int
nvkm_dma_oclass_fifo_get(struct nvkm_oclass *oclass, int index)
{
const int count = ARRAY_SIZE(nvkm_dma_sclass);
if (index < count) {
oclass->base = nvkm_dma_sclass[index];
return index;
}
return count;
}
static void *
nvkm_dma_dtor(struct nvkm_engine *engine)
{
return nvkm_dma(engine);
}
static const struct nvkm_engine_func
nvkm_dma = {
.dtor = nvkm_dma_dtor,
.base.sclass = nvkm_dma_oclass_base_get,
.fifo.sclass = nvkm_dma_oclass_fifo_get,
};
int
nvkm_dma_new_(const struct nvkm_dma_func *func, struct nvkm_device *device,
int index, struct nvkm_dma **pdma)
{
struct nvkm_dma *dma;
if (!(dma = *pdma = kzalloc(sizeof(*dma), GFP_KERNEL)))
return -ENOMEM;
dma->func = func;
return nvkm_engine_ctor(&nvkm_dma, device, index,
0, true, &dma->engine);
}
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