/*
 * 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 <subdev/fb.h>

#include "nv04.h"

static int
nv04_instobj_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
                  struct nouveau_oclass *oclass, void *data, u32 size,
                  struct nouveau_object **pobject)
{
        struct nv04_instmem_priv *priv = (void *)engine;
        struct nv04_instobj_priv *node;
        int ret, align;

        align = (unsigned long)data;
        if (!align)
                align = 1;

        ret = nouveau_instobj_create(parent, engine, oclass, &node);
        *pobject = nv_object(node);
        if (ret)
                return ret;

        ret = nouveau_mm_head(&priv->heap, 1, size, size, align, &node->mem);
        if (ret)
                return ret;

        node->base.addr = node->mem->offset;
        node->base.size = node->mem->length;
        return 0;
}

static void
nv04_instobj_dtor(struct nouveau_object *object)
{
        struct nv04_instmem_priv *priv = (void *)object->engine;
        struct nv04_instobj_priv *node = (void *)object;
        nouveau_mm_free(&priv->heap, &node->mem);
        nouveau_instobj_destroy(&node->base);
}

static u32
nv04_instobj_rd32(struct nouveau_object *object, u32 addr)
{
        struct nv04_instobj_priv *node = (void *)object;
        return nv_ro32(object->engine, node->mem->offset + addr);
}

static void
nv04_instobj_wr32(struct nouveau_object *object, u32 addr, u32 data)
{
        struct nv04_instobj_priv *node = (void *)object;
        nv_wo32(object->engine, node->mem->offset + addr, data);
}

static struct nouveau_oclass
nv04_instobj_oclass = {
        .ofuncs = &(struct nouveau_ofuncs) {
                .ctor = nv04_instobj_ctor,
                .dtor = nv04_instobj_dtor,
                .init = _nouveau_instobj_init,
                .fini = _nouveau_instobj_fini,
                .rd32 = nv04_instobj_rd32,
                .wr32 = nv04_instobj_wr32,
        },
};

int
nv04_instmem_alloc(struct nouveau_instmem *imem, struct nouveau_object *parent,
                   u32 size, u32 align, struct nouveau_object **pobject)
{
        struct nouveau_object *engine = nv_object(imem);
        struct nv04_instmem_priv *priv = (void *)(imem);
        int ret;

        ret = nouveau_object_ctor(parent, engine, &nv04_instobj_oclass,
                                  (void *)(unsigned long)align, size, pobject);
        if (ret)
                return ret;

        /* INSTMEM itself creates objects to reserve (and preserve across
         * suspend/resume) various fixed data locations, each one of these
         * takes a reference on INSTMEM itself, causing it to never be
         * freed.  We drop all the self-references here to avoid this.
         */
        if (unlikely(!priv->created))
                atomic_dec(&engine->refcount);

        return 0;
}

static int
nv04_instmem_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
                  struct nouveau_oclass *oclass, void *data, u32 size,
                  struct nouveau_object **pobject)
{
        struct nv04_instmem_priv *priv;
        int ret;

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

        /* PRAMIN aperture maps over the end of VRAM, reserve it */
        priv->base.reserved = 512 * 1024;
        priv->base.alloc    = nv04_instmem_alloc;

        ret = nouveau_mm_init(&priv->heap, 0, priv->base.reserved, 1);
        if (ret)
                return ret;

        /* 0x00000-0x10000: reserve for probable vbios image */
        ret = nouveau_gpuobj_new(parent, NULL, 0x10000, 0, 0, &priv->vbios);
        if (ret)
                return ret;

        /* 0x10000-0x18000: reserve for RAMHT */
        ret = nouveau_ramht_new(parent, NULL, 0x08000, 0, &priv->ramht);
        if (ret)
                return ret;

        /* 0x18000-0x18800: reserve for RAMFC (enough for 32 nv30 channels) */
        ret = nouveau_gpuobj_new(parent, NULL, 0x00800, 0,
                                 NVOBJ_FLAG_ZERO_ALLOC, &priv->ramfc);
        if (ret)
                return ret;

        /* 0x18800-0x18a00: reserve for RAMRO */
        ret = nouveau_gpuobj_new(parent, NULL, 0x00200, 0, 0, &priv->ramro);
        if (ret)
                return ret;

        priv->created = true;
        return 0;
}

void
nv04_instmem_dtor(struct nouveau_object *object)
{
        struct nv04_instmem_priv *priv = (void *)object;
        nouveau_gpuobj_ref(NULL, &priv->ramfc);
        nouveau_gpuobj_ref(NULL, &priv->ramro);
        nouveau_ramht_ref(NULL, &priv->ramht);
        nouveau_gpuobj_ref(NULL, &priv->vbios);
        nouveau_mm_fini(&priv->heap);
        if (priv->iomem)
                iounmap(priv->iomem);
        nouveau_instmem_destroy(&priv->base);
}

static u32
nv04_instmem_rd32(struct nouveau_object *object, u32 addr)
{
        return nv_rd32(object, 0x700000 + addr);
}

static void
nv04_instmem_wr32(struct nouveau_object *object, u32 addr, u32 data)
{
        return nv_wr32(object, 0x700000 + addr, data);
}

struct nouveau_oclass
nv04_instmem_oclass = {
        .handle = NV_SUBDEV(INSTMEM, 0x04),
        .ofuncs = &(struct nouveau_ofuncs) {
                .ctor = nv04_instmem_ctor,
                .dtor = nv04_instmem_dtor,
                .init = _nouveau_instmem_init,
                .fini = _nouveau_instmem_fini,
                .rd32 = nv04_instmem_rd32,
                .wr32 = nv04_instmem_wr32,
        },
};