Re: [Nouveau] [PATCH nouveau 08/11] instmem: add dummy support for GK20A

[Ilia Mirkin]

On Tue, Dec 23, 2014 at 5:40 AM, Vince Hsu <vinceh@xxxxxxxxxx> wrote:
> This is a workaround to avoid the instmem backup/restore during the suspend
> and resume process in nv50 instemem driver.
>
> Signed-off-by: Vince Hsu <vinceh@xxxxxxxxxx>
> ---
>  drm/Kbuild                    |  1 +
>  nvkm/engine/device/nve0.c     |  2 +-
>  nvkm/include/subdev/instmem.h |  1 +
>  nvkm/subdev/instmem/gk20a.c   | 70 +++++++++++++++++++++++++++++++++++++++++++
>  4 files changed, 73 insertions(+), 1 deletion(-)
>  create mode 100644 nvkm/subdev/instmem/gk20a.c
>
> diff --git a/drm/Kbuild b/drm/Kbuild
> index 6461e3565afe..ea40cd653c7c 100644
> --- a/drm/Kbuild
> +++ b/drm/Kbuild
> @@ -176,6 +176,7 @@ nouveau-y += core/subdev/instmem/base.o
>  nouveau-y += core/subdev/instmem/nv04.o
>  nouveau-y += core/subdev/instmem/nv40.o
>  nouveau-y += core/subdev/instmem/nv50.o
> +nouveau-y += core/subdev/instmem/gk20a.o
>  nouveau-y += core/subdev/ltc/base.o
>  nouveau-y += core/subdev/ltc/gf100.o
>  nouveau-y += core/subdev/ltc/gk104.o
> diff --git a/nvkm/engine/device/nve0.c b/nvkm/engine/device/nve0.c
> index 732922690653..fcbdc5259c7c 100644
> --- a/nvkm/engine/device/nve0.c
> +++ b/nvkm/engine/device/nve0.c
> @@ -170,7 +170,7 @@ nve0_identify(struct nouveau_device *device)
>                 device->oclass[NVDEV_SUBDEV_FB     ] =  gk20a_fb_oclass;
>                 device->oclass[NVDEV_SUBDEV_LTC    ] =  gk104_ltc_oclass;
>                 device->oclass[NVDEV_SUBDEV_IBUS   ] = &gk20a_ibus_oclass;
> -               device->oclass[NVDEV_SUBDEV_INSTMEM] = nv50_instmem_oclass;
> +               device->oclass[NVDEV_SUBDEV_INSTMEM] = gk20a_instmem_oclass;
>                 device->oclass[NVDEV_SUBDEV_VM     ] = &nvc0_vmmgr_oclass;
>                 device->oclass[NVDEV_SUBDEV_BAR    ] = &gk20a_bar_oclass;
>                 device->oclass[NVDEV_ENGINE_DMAOBJ ] =  nvd0_dmaeng_oclass;
> diff --git a/nvkm/include/subdev/instmem.h b/nvkm/include/subdev/instmem.h
> index c1df26f3230c..6264660bedce 100644
> --- a/nvkm/include/subdev/instmem.h
> +++ b/nvkm/include/subdev/instmem.h
> @@ -48,5 +48,6 @@ nouveau_instmem(void *obj)
>  extern struct nouveau_oclass *nv04_instmem_oclass;
>  extern struct nouveau_oclass *nv40_instmem_oclass;
>  extern struct nouveau_oclass *nv50_instmem_oclass;
> +extern struct nouveau_oclass *gk20a_instmem_oclass;
>
>  #endif
> diff --git a/nvkm/subdev/instmem/gk20a.c b/nvkm/subdev/instmem/gk20a.c
> new file mode 100644
> index 000000000000..5e072d6e743f
> --- /dev/null
> +++ b/nvkm/subdev/instmem/gk20a.c
> @@ -0,0 +1,70 @@
> +/*
> + * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved.
> + *
> + * 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 AUTHORS OR COPYRIGHT HOLDERS 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.
> + *
> + */
> +
> +#include "nv50.h"

I'm confused... what exactly depends on nv50_instmem_priv here? Why
not just create a gk20a_instmem_priv and leave the nv50 one alone?

> +#include "priv.h"
> +
> +static int
> +gk20a_instmem_fini(struct nouveau_object *object, bool suspend)
> +{
> +       struct nouveau_instmem *imem = (void *)object;
> +
> +       return nouveau_subdev_fini(&imem->base, suspend);
> +}
> +
> +static int
> +gk20a_instmem_init(struct nouveau_object *object)
> +{
> +       struct nouveau_instmem *imem = (void *)object;
> +
> +       return nouveau_subdev_init(&imem->base);
> +}

I think the style is to just link those up directly in the class
definition when they're trivial like that, i.e. point them at
_nouveau_subdev_init and such.

> +
> +static int
> +gk20a_instmem_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
> +                 struct nouveau_oclass *oclass, void *data, u32 size,
> +                 struct nouveau_object **pobject)
> +{
> +       struct nv50_instmem_priv *priv;
> +       int ret;
> +
> +       ret = nouveau_instmem_create(parent, engine, oclass, &priv);
> +       *pobject = nv_object(priv);
> +       if (ret)
> +               return ret;
> +
> +       spin_lock_init(&priv->lock);
> +       return 0;
> +}
> +
> +struct nouveau_oclass *
> +gk20a_instmem_oclass = &(struct nouveau_instmem_impl) {
> +       .base.handle = NV_SUBDEV(INSTMEM, 0x50),
> +       .base.ofuncs = &(struct nouveau_ofuncs) {
> +               .ctor = gk20a_instmem_ctor,
> +               .dtor = _nouveau_instmem_dtor,
> +               .init = gk20a_instmem_init,
> +               .fini = gk20a_instmem_fini,
> +       },
> +       .instobj = &nv50_instobj_oclass.base,
> +}.base;
> --
> 1.9.1
>
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