/*
 * 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 <core/os.h>
#include <core/class.h>
#include <core/engctx.h>
#include <core/namedb.h>
#include <core/handle.h>
#include <core/gpuobj.h>
#include <core/event.h>

#include <subdev/bar.h>

#include <engine/software.h>
#include <engine/disp.h>

struct nv50_software_priv {
        struct nouveau_software base;
};

struct nv50_software_chan {
        struct nouveau_software_chan base;
};

/*******************************************************************************
 * software object classes
 ******************************************************************************/

static int
nv50_software_mthd_dma_vblsem(struct nouveau_object *object, u32 mthd,
                              void *args, u32 size)
{
        struct nv50_software_chan *chan = (void *)nv_engctx(object->parent);
        struct nouveau_fifo_chan *fifo = (void *)nv_object(chan)->parent;
        struct nouveau_handle *handle;
        int ret = -EINVAL;

        handle = nouveau_namedb_get(nv_namedb(fifo), *(u32 *)args);
        if (!handle)
                return -ENOENT;

        if (nv_iclass(handle->object, NV_GPUOBJ_CLASS)) {
                struct nouveau_gpuobj *gpuobj = nv_gpuobj(handle->object);
                chan->base.vblank.ctxdma = gpuobj->node->offset >> 4;
                ret = 0;
        }
        nouveau_namedb_put(handle);
        return ret;
}

static int
nv50_software_mthd_vblsem_offset(struct nouveau_object *object, u32 mthd,
                                 void *args, u32 size)
{
        struct nv50_software_chan *chan = (void *)nv_engctx(object->parent);
        chan->base.vblank.offset = *(u32 *)args;
        return 0;
}

static int
nv50_software_mthd_vblsem_value(struct nouveau_object *object, u32 mthd,
                                void *args, u32 size)
{
        struct nv50_software_chan *chan = (void *)nv_engctx(object->parent);
        chan->base.vblank.value = *(u32 *)args;
        return 0;
}

static int
nv50_software_mthd_vblsem_release(struct nouveau_object *object, u32 mthd,
                                  void *args, u32 size)
{
        struct nv50_software_chan *chan = (void *)nv_engctx(object->parent);
        struct nouveau_disp *disp = nouveau_disp(object);
        u32 crtc = *(u32 *)args;
        if (crtc > 1)
                return -EINVAL;

        nouveau_event_get(disp->vblank, crtc, &chan->base.vblank.event);
        return 0;
}

static int
nv50_software_mthd_flip(struct nouveau_object *object, u32 mthd,
                        void *args, u32 size)
{
        struct nv50_software_chan *chan = (void *)nv_engctx(object->parent);
        if (chan->base.flip)
                return chan->base.flip(chan->base.flip_data);
        return -EINVAL;
}

static struct nouveau_omthds
nv50_software_omthds[] = {
        { 0x018c, 0x018c, nv50_software_mthd_dma_vblsem },
        { 0x0400, 0x0400, nv50_software_mthd_vblsem_offset },
        { 0x0404, 0x0404, nv50_software_mthd_vblsem_value },
        { 0x0408, 0x0408, nv50_software_mthd_vblsem_release },
        { 0x0500, 0x0500, nv50_software_mthd_flip },
        {}
};

static struct nouveau_oclass
nv50_software_sclass[] = {
        { 0x506e, &nouveau_object_ofuncs, nv50_software_omthds },
        {}
};

/*******************************************************************************
 * software context
 ******************************************************************************/

static int
nv50_software_vblsem_release(struct nouveau_eventh *event, int head)
{
        struct nouveau_software_chan *chan =
                container_of(event, struct nouveau_software_chan, vblank.event);
        struct nv50_software_priv *priv = (void *)nv_object(chan)->engine;
        struct nouveau_bar *bar = nouveau_bar(priv);

        nv_wr32(priv, 0x001704, chan->vblank.channel);
        nv_wr32(priv, 0x001710, 0x80000000 | chan->vblank.ctxdma);
        bar->flush(bar);

        if (nv_device(priv)->chipset == 0x50) {
                nv_wr32(priv, 0x001570, chan->vblank.offset);
                nv_wr32(priv, 0x001574, chan->vblank.value);
        } else {
                nv_wr32(priv, 0x060010, chan->vblank.offset);
                nv_wr32(priv, 0x060014, chan->vblank.value);
        }

        return NVKM_EVENT_DROP;
}

static int
nv50_software_context_ctor(struct nouveau_object *parent,
                           struct nouveau_object *engine,
                           struct nouveau_oclass *oclass, void *data, u32 size,
                           struct nouveau_object **pobject)
{
        struct nv50_software_chan *chan;
        int ret;

        ret = nouveau_software_context_create(parent, engine, oclass, &chan);
        *pobject = nv_object(chan);
        if (ret)
                return ret;

        chan->base.vblank.channel = nv_gpuobj(parent->parent)->addr >> 12;
        chan->base.vblank.event.func = nv50_software_vblsem_release;
        return 0;
}

static struct nouveau_oclass
nv50_software_cclass = {
        .handle = NV_ENGCTX(SW, 0x50),
        .ofuncs = &(struct nouveau_ofuncs) {
                .ctor = nv50_software_context_ctor,
                .dtor = _nouveau_software_context_dtor,
                .init = _nouveau_software_context_init,
                .fini = _nouveau_software_context_fini,
        },
};

/*******************************************************************************
 * software engine/subdev functions
 ******************************************************************************/

static int
nv50_software_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
                   struct nouveau_oclass *oclass, void *data, u32 size,
                   struct nouveau_object **pobject)
{
        struct nv50_software_priv *priv;
        int ret;

        ret = nouveau_software_create(parent, engine, oclass, &priv);
        *pobject = nv_object(priv);
        if (ret)
                return ret;

        nv_engine(priv)->cclass = &nv50_software_cclass;
        nv_engine(priv)->sclass = nv50_software_sclass;
        nv_subdev(priv)->intr = nv04_software_intr;
        return 0;
}

struct nouveau_oclass
nv50_software_oclass = {
        .handle = NV_ENGINE(SW, 0x50),
        .ofuncs = &(struct nouveau_ofuncs) {
                .ctor = nv50_software_ctor,
                .dtor = _nouveau_software_dtor,
                .init = _nouveau_software_init,
                .fini = _nouveau_software_fini,
        },
};