gpuobj.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 <core/gpuobj.h>

#include <subdev/instmem.h>
#include <subdev/bar.h>
#include <subdev/vm.h>

void
nouveau_gpuobj_destroy(struct nouveau_gpuobj *gpuobj)
{
    int i;

    if (gpuobj->flags & NVOBJ_FLAG_ZERO_FREE) {
        for (i = 0; i < gpuobj->size; i += 4)
            nv_wo32(gpuobj, i, 0x00000000);
    }

    if (gpuobj->node) {
        nouveau_mm_free(&nv_gpuobj(gpuobj->parent)->heap,
                &gpuobj->node);
    }

    if (gpuobj->heap.block_size)
        nouveau_mm_fini(&gpuobj->heap);

    nouveau_object_destroy(&gpuobj->base);
}

int
nouveau_gpuobj_create_(struct nouveau_object *parent,
               struct nouveau_object *engine,
               struct nouveau_oclass *oclass, u32 pclass,
               struct nouveau_object *pargpu,
               u32 size, u32 align, u32 flags,
               int length, void **pobject)
{
    struct nouveau_instmem *imem = nouveau_instmem(parent);
    struct nouveau_bar *bar = nouveau_bar(parent);
    struct nouveau_gpuobj *gpuobj;
    struct nouveau_mm *heap = NULL;
    int ret, i;
    u64 addr;

    *pobject = NULL;

    if (pargpu) {
        while ((pargpu = nv_pclass(pargpu, NV_GPUOBJ_CLASS))) {
            if (nv_gpuobj(pargpu)->heap.block_size)
                break;
            pargpu = pargpu->parent;
        }

        if (unlikely(pargpu == NULL)) {
            nv_error(parent, "no gpuobj heap\n");
            return -EINVAL;
        }

        addr =  nv_gpuobj(pargpu)->addr;
        heap = &nv_gpuobj(pargpu)->heap;
        atomic_inc(&parent->refcount);
    } else {
        ret = imem->alloc(imem, parent, size, align, &parent);
        pargpu = parent;
        if (ret)
            return ret;

        addr = nv_memobj(pargpu)->addr;
        size = nv_memobj(pargpu)->size;

        if (bar && bar->alloc) {
            struct nouveau_instobj *iobj = (void *)parent;
            struct nouveau_mem **mem = (void *)(iobj + 1);
            struct nouveau_mem *node = *mem;
            if (!bar->alloc(bar, parent, node, &pargpu)) {
                nouveau_object_ref(NULL, &parent);
                parent = pargpu;
            }
        }
    }

    ret = nouveau_object_create_(parent, engine, oclass, pclass |
                     NV_GPUOBJ_CLASS, length, pobject);
    nouveau_object_ref(NULL, &parent);
    gpuobj = *pobject;
    if (ret)
        return ret;

    gpuobj->parent = pargpu;
    gpuobj->flags = flags;
    gpuobj->addr = addr;
    gpuobj->size = size;

    if (heap) {
        ret = nouveau_mm_head(heap, 1, size, size,
                      max(align, (u32)1), &gpuobj->node);
        if (ret)
            return ret;

        gpuobj->addr += gpuobj->node->offset;
    }

    if (gpuobj->flags & NVOBJ_FLAG_HEAP) {
        ret = nouveau_mm_init(&gpuobj->heap, 0, gpuobj->size, 1);
        if (ret)
            return ret;
    }

    if (flags & NVOBJ_FLAG_ZERO_ALLOC) {
        for (i = 0; i < gpuobj->size; i += 4)
            nv_wo32(gpuobj, i, 0x00000000);
    }

    return ret;
}

struct nouveau_gpuobj_class {
    struct nouveau_object *pargpu;
    u64 size;
    u32 align;
    u32 flags;
};

static int
_nouveau_gpuobj_ctor(struct nouveau_object *parent,
             struct nouveau_object *engine,
             struct nouveau_oclass *oclass, void *data, u32 size,
             struct nouveau_object **pobject)
{
    struct nouveau_gpuobj_class *args = data;
    struct nouveau_gpuobj *object;
    int ret;

    ret = nouveau_gpuobj_create(parent, engine, oclass, 0, args->pargpu,
                    args->size, args->align, args->flags,
                    &object);
    *pobject = nv_object(object);
    if (ret)
        return ret;

    return 0;
}

void
_nouveau_gpuobj_dtor(struct nouveau_object *object)
{
    nouveau_gpuobj_destroy(nv_gpuobj(object));
}

int
_nouveau_gpuobj_init(struct nouveau_object *object)
{
    return nouveau_gpuobj_init(nv_gpuobj(object));
}

int
_nouveau_gpuobj_fini(struct nouveau_object *object, bool suspend)
{
    return nouveau_gpuobj_fini(nv_gpuobj(object), suspend);
}

u32
_nouveau_gpuobj_rd32(struct nouveau_object *object, u32 addr)
{
    struct nouveau_gpuobj *gpuobj = nv_gpuobj(object);
    struct nouveau_ofuncs *pfuncs = nv_ofuncs(gpuobj->parent);
    if (gpuobj->node)
        addr += gpuobj->node->offset;
    return pfuncs->rd32(gpuobj->parent, addr);
}

void
_nouveau_gpuobj_wr32(struct nouveau_object *object, u32 addr, u32 data)
{
    struct nouveau_gpuobj *gpuobj = nv_gpuobj(object);
    struct nouveau_ofuncs *pfuncs = nv_ofuncs(gpuobj->parent);
    if (gpuobj->node)
        addr += gpuobj->node->offset;
    pfuncs->wr32(gpuobj->parent, addr, data);
}

static struct nouveau_oclass
_nouveau_gpuobj_oclass = {
    .handle = 0x00000000,
    .ofuncs = &(struct nouveau_ofuncs) {
        .ctor = _nouveau_gpuobj_ctor,
        .dtor = _nouveau_gpuobj_dtor,
        .init = _nouveau_gpuobj_init,
        .fini = _nouveau_gpuobj_fini,
        .rd32 = _nouveau_gpuobj_rd32,
        .wr32 = _nouveau_gpuobj_wr32,
    },
};

int
nouveau_gpuobj_new(struct nouveau_object *parent, struct nouveau_object *pargpu,
           u32 size, u32 align, u32 flags,
           struct nouveau_gpuobj **pgpuobj)
{
    struct nouveau_object *engine = parent;
    struct nouveau_gpuobj_class args = {
        .pargpu = pargpu,
        .size = size,
        .align = align,
        .flags = flags,
    };

    if (!nv_iclass(engine, NV_SUBDEV_CLASS))
        engine = engine->engine;
    BUG_ON(engine == NULL);

    return nouveau_object_ctor(parent, engine, &_nouveau_gpuobj_oclass,
                   &args, sizeof(args),
                   (struct nouveau_object **)pgpuobj);
}

int
nouveau_gpuobj_map(struct nouveau_gpuobj *gpuobj, u32 access,
           struct nouveau_vma *vma)
{
    struct nouveau_bar *bar = nouveau_bar(gpuobj);
    int ret = -EINVAL;

    if (bar && bar->umap) {
        struct nouveau_instobj *iobj = (void *)
            nv_pclass(nv_object(gpuobj), NV_MEMOBJ_CLASS);
        struct nouveau_mem **mem = (void *)(iobj + 1);
        ret = bar->umap(bar, *mem, access, vma);
    }

    return ret;
}

int
nouveau_gpuobj_map_vm(struct nouveau_gpuobj *gpuobj, struct nouveau_vm *vm,
              u32 access, struct nouveau_vma *vma)
{
    struct nouveau_instobj *iobj = (void *)
        nv_pclass(nv_object(gpuobj), NV_MEMOBJ_CLASS);
    struct nouveau_mem **mem = (void *)(iobj + 1);
    int ret;

    ret = nouveau_vm_get(vm, gpuobj->size, 12, access, vma);
    if (ret)
        return ret;

    nouveau_vm_map(vma, *mem);
    return 0;
}

void
nouveau_gpuobj_unmap(struct nouveau_vma *vma)
{
    if (vma->node) {
        nouveau_vm_unmap(vma);
        nouveau_vm_put(vma);
    }
}

/* the below is basically only here to support sharing the paged dma object
 * for PCI(E)GART on <=nv4x chipsets, and should *not* be expected to work
 * anywhere else.
 */

static void
nouveau_gpudup_dtor(struct nouveau_object *object)
{
    struct nouveau_gpuobj *gpuobj = (void *)object;
    nouveau_object_ref(NULL, &gpuobj->parent);
    nouveau_object_destroy(&gpuobj->base);
}

static struct nouveau_oclass
nouveau_gpudup_oclass = {
    .handle = NV_GPUOBJ_CLASS,
    .ofuncs = &(struct nouveau_ofuncs) {
        .dtor = nouveau_gpudup_dtor,
        .init = nouveau_object_init,
        .fini = nouveau_object_fini,
    },
};

int
nouveau_gpuobj_dup(struct nouveau_object *parent, struct nouveau_gpuobj *base,
           struct nouveau_gpuobj **pgpuobj)
{
    struct nouveau_gpuobj *gpuobj;
    int ret;

    ret = nouveau_object_create(parent, parent->engine,
                   &nouveau_gpudup_oclass, 0, &gpuobj);
    *pgpuobj = gpuobj;
    if (ret)
        return ret;

    nouveau_object_ref(nv_object(base), &gpuobj->parent);
    gpuobj->addr = base->addr;
    gpuobj->size = base->size;
    return 0;
}