base.c

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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 <core/object.h>
#include <subdev/bar.h>

struct nouveau_barobj {
    struct nouveau_object base;
    struct nouveau_vma vma;
    void __iomem *iomem;
};

static int
nouveau_barobj_ctor(struct nouveau_object *parent,
            struct nouveau_object *engine,
            struct nouveau_oclass *oclass, void *mem, u32 size,
            struct nouveau_object **pobject)
{
    struct nouveau_bar *bar = (void *)engine;
    struct nouveau_barobj *barobj;
    int ret;

    ret = nouveau_object_create(parent, engine, oclass, 0, &barobj);
    *pobject = nv_object(barobj);
    if (ret)
        return ret;

    ret = bar->kmap(bar, mem, NV_MEM_ACCESS_RW, &barobj->vma);
    if (ret)
        return ret;

    barobj->iomem = bar->iomem + (u32)barobj->vma.offset;
    return 0;
}

static void
nouveau_barobj_dtor(struct nouveau_object *object)
{
    struct nouveau_bar *bar = (void *)object->engine;
    struct nouveau_barobj *barobj = (void *)object;
    if (barobj->vma.node)
        bar->unmap(bar, &barobj->vma);
    nouveau_object_destroy(&barobj->base);
}

static u32
nouveau_barobj_rd32(struct nouveau_object *object, u32 addr)
{
    struct nouveau_barobj *barobj = (void *)object;
    return ioread32_native(barobj->iomem + addr);
}

static void
nouveau_barobj_wr32(struct nouveau_object *object, u32 addr, u32 data)
{
    struct nouveau_barobj *barobj = (void *)object;
    iowrite32_native(data, barobj->iomem + addr);
}

static struct nouveau_oclass
nouveau_barobj_oclass = {
    .ofuncs = &(struct nouveau_ofuncs) {
        .ctor = nouveau_barobj_ctor,
        .dtor = nouveau_barobj_dtor,
        .init = nouveau_object_init,
        .fini = nouveau_object_fini,
        .rd32 = nouveau_barobj_rd32,
        .wr32 = nouveau_barobj_wr32,
    },
};

int
nouveau_bar_alloc(struct nouveau_bar *bar, struct nouveau_object *parent,
          struct nouveau_mem *mem, struct nouveau_object **pobject)
{
    struct nouveau_object *engine = nv_object(bar);
    return nouveau_object_ctor(parent, engine, &nouveau_barobj_oclass,
                   mem, 0, pobject);
}

int
nouveau_bar_create_(struct nouveau_object *parent,
            struct nouveau_object *engine,
            struct nouveau_oclass *oclass, int length, void **pobject)
{
    struct nouveau_device *device = nv_device(parent);
    struct nouveau_bar *bar;
    int ret;

    ret = nouveau_subdev_create_(parent, engine, oclass, 0, "BARCTL",
                     "bar", length, pobject);
    bar = *pobject;
    if (ret)
        return ret;

    bar->iomem = ioremap(pci_resource_start(device->pdev, 3),
                 pci_resource_len(device->pdev, 3));
    return 0;
}

void
nouveau_bar_destroy(struct nouveau_bar *bar)
{
    if (bar->iomem)
        iounmap(bar->iomem);
    nouveau_subdev_destroy(&bar->base);
}

void
_nouveau_bar_dtor(struct nouveau_object *object)
{
    struct nouveau_bar *bar = (void *)object;
    nouveau_bar_destroy(bar);
}