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Date:	Wed, 24 Dec 2014 10:44:43 +0800
From:	Vince Hsu <vinceh@...dia.com>
To:	Ilia Mirkin <imirkin@...m.mit.edu>
CC:	Thierry Reding <thierry.reding@...il.com>,
	Stephen Warren <swarren@...dotorg.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Ben Skeggs <bskeggs@...hat.com>,
	Martin Peres <martin.peres@...e.fr>,
	Roy Spliet <seven@...rod-online.com>,
	Samuel Pitoiset <samuel.pitoiset@...il.com>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"nouveau@...ts.freedesktop.org" <nouveau@...ts.freedesktop.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [Nouveau] [PATCH nouveau 08/11] instmem: add dummy support for
 GK20A

Hi,

On 12/24/2014 12:39 AM, Ilia Mirkin wrote:
> On Tue, Dec 23, 2014 at 5:40 AM, Vince Hsu <vinceh@...dia.com> 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@...dia.com>
>> ---
>>   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?
You're right. Will fix in the next version.
>
>> +#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.
Thanks for the hint. Will fix. :)

>
>> +
>> +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
>>
>> _______________________________________________
>> Nouveau mailing list
>> Nouveau@...ts.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/nouveau

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