linux-kernel - Re: [PATCH v9 1/3] i915/gvt: Separate the MMIO tracking table from GVT-g

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Date:   Wed, 13 Apr 2022 12:31:07 +0300
From:   Jani Nikula <jani.nikula@...ux.intel.com>
To:     "Wang, Zhi A" <zhi.a.wang@...el.com>,
        Zhi Wang <zhi.wang.linux@...il.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org>,
        "intel-gvt-dev@...ts.freedesktop.org" 
        <intel-gvt-dev@...ts.freedesktop.org>
Cc:     Zhi Wang <zhi.a.wang@...il.com>, Christoph Hellwig <hch@....de>,
        Jason Gunthorpe <jgg@...dia.com>,
        Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
        "Vivi, Rodrigo" <rodrigo.vivi@...el.com>,
        Zhenyu Wang <zhenyuw@...ux.intel.com>
Subject: Re: [PATCH v9 1/3] i915/gvt: Separate the MMIO tracking table from
 GVT-g

On Fri, 08 Apr 2022, "Wang, Zhi A" <zhi.a.wang@...el.com> wrote:
> Hi Jani:
>
> Thanks so much for the help. Can you generate a new tag on
> drm-intel-next? I noticed that there was one patch moving the DMC
> related registers into display/intel_dmc_regs.h, which is not included
> in the latest tag on drm-intel-next.

Sorry, I'm not sure what you're asking exactly. We do tags when we
create pull requests for drm-next, but I don't see the connection to
gvt.

BR,
Jani.

>
> Guess it would be better that I can change this patch according to it
> when checking in. This would prevent a conflict in future.
>
> Thanks,
> Zhi.
>
> On 4/7/22 3:03 PM, Jani Nikula wrote:
>> On Thu, 07 Apr 2022, Zhi Wang <zhi.wang.linux@...il.com> wrote:
>>> diff --git a/drivers/gpu/drm/i915/intel_gvt.h b/drivers/gpu/drm/i915/intel_gvt.h
>>> index d7d3fb6186fd..7665d7cf0bdd 100644
>>> --- a/drivers/gpu/drm/i915/intel_gvt.h
>>> +++ b/drivers/gpu/drm/i915/intel_gvt.h
>>> @@ -26,7 +26,17 @@
>>>  
>>>  struct drm_i915_private;
>>>  
>>> +#include <linux/kernel.h>
>> 
>> You only need <linux/types.h>. Please add it before the forward
>> declaration above.
>> 
>>> +
>>>  #ifdef CONFIG_DRM_I915_GVT
>>> +
>>> +struct intel_gvt_mmio_table_iter {
>>> +	struct drm_i915_private *i915;
>>> +	void *data;
>>> +	int (*handle_mmio_cb)(struct intel_gvt_mmio_table_iter *iter,
>>> +			      u32 offset, u32 size);
>>> +};
>>> +
>>>  int intel_gvt_init(struct drm_i915_private *dev_priv);
>>>  void intel_gvt_driver_remove(struct drm_i915_private *dev_priv);
>>>  int intel_gvt_init_device(struct drm_i915_private *dev_priv);
>>> @@ -34,6 +44,7 @@ void intel_gvt_clean_device(struct drm_i915_private *dev_priv);
>>>  int intel_gvt_init_host(void);
>>>  void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv);
>>>  void intel_gvt_resume(struct drm_i915_private *dev_priv);
>>> +int intel_gvt_iterate_mmio_table(struct intel_gvt_mmio_table_iter *iter);
>>>  #else
>>>  static inline int intel_gvt_init(struct drm_i915_private *dev_priv)
>>>  {
>>> @@ -51,6 +62,16 @@ static inline void intel_gvt_sanitize_options(struct drm_i915_private *dev_priv)
>>>  static inline void intel_gvt_resume(struct drm_i915_private *dev_priv)
>>>  {
>>>  }
>>> +
>>> +unsigned long intel_gvt_get_device_type(struct drm_i915_private *i915)
>>> +{
>>> +	return 0;
>>> +}
>> 
>> The CONFIG_DRM_I915_GVT=y counterpart for this is in mmio.h. Should be
>> both in the same header.
>> 
>>> +
>>> +int intel_gvt_iterate_mmio_table(struct intel_gvt_mmio_table_iter *iter)
>>> +{
>>> +	return 0;
>>> +}
>>>  #endif
>>>  
>>>  #endif /* _INTEL_GVT_H_ */
>>> diff --git a/drivers/gpu/drm/i915/intel_gvt_mmio_table.c b/drivers/gpu/drm/i915/intel_gvt_mmio_table.c
>>> new file mode 100644
>>> index 000000000000..d29491a6d209
>>> --- /dev/null
>>> +++ b/drivers/gpu/drm/i915/intel_gvt_mmio_table.c
>>> @@ -0,0 +1,1290 @@
>>> +// SPDX-License-Identifier: MIT
>>> +/*
>>> + * Copyright © 2020 Intel Corporation
>>> + */
>>> +
>>> +#include "i915_drv.h"
>>> +#include "i915_reg.h"
>>> +#include "display/vlv_dsi_pll_regs.h"
>>> +#include "gt/intel_gt_regs.h"
>>> +#include "intel_mchbar_regs.h"
>>> +#include "i915_pvinfo.h"
>>> +#include "intel_gvt.h"
>>> +#include "gvt/gvt.h"
>> 
>> Generally we have the include lists sorted.
>> 
>> Other than the nitpicks above, the series is
>> 
>> Acked-by: Jani Nikula <jani.nikula@...el.com>
>> 
>> 
>> BR,
>> Jani.
>> 
>> 
>

-- 
Jani Nikula, Intel Open Source Graphics Center