netdev - Re: [PATCH v14 03/22] cxl: move pci generic code

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Message-ID: <aBzn2dYVhh4W_I0S@aschofie-mobl2.lan>
Date: Thu, 8 May 2025 10:20:25 -0700
From: Alison Schofield <alison.schofield@...el.com>
To: Alejandro Lucero Palau <alucerop@....com>
CC: <alejandro.lucero-palau@....com>, <linux-cxl@...r.kernel.org>,
	<netdev@...r.kernel.org>, <dan.j.williams@...el.com>, <edward.cree@....com>,
	<davem@...emloft.net>, <kuba@...nel.org>, <pabeni@...hat.com>,
	<edumazet@...gle.com>, <dave.jiang@...el.com>, Ben Cheatham
	<benjamin.cheatham@....com>, Fan Ni <fan.ni@...sung.com>, Jonathan Cameron
	<Jonathan.Cameron@...wei.com>
Subject: Re: [PATCH v14 03/22] cxl: move pci generic code

On Thu, May 08, 2025 at 01:45:16PM +0100, Alejandro Lucero Palau wrote:
> 
> On 5/8/25 01:36, Alison Schofield wrote:
> > On Thu, Apr 17, 2025 at 10:29:06PM +0100, alejandro.lucero-palau@....com wrote:
> > > From: Alejandro Lucero <alucerop@....com>
> > > 
> > > Inside cxl/core/pci.c there are helpers for CXL PCIe initialization
> > > meanwhile cxl/pci.c implements the functionality for a Type3 device
> > > initialization.
> > > 
> > > Move helper functions from cxl/pci.c to cxl/core/pci.c in order to be
> > > exported and shared with CXL Type2 device initialization.
> > > 
> > > Signed-off-by: Alejandro Lucero <alucerop@....com>
> > > Reviewed-by: Dave Jiang <dave.jiang@...el.com>
> > > Reviewed-by: Ben Cheatham <benjamin.cheatham@....com>
> > > Reviewed-by: Fan Ni <fan.ni@...sung.com>
> > > Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
> > > ---
> > >   drivers/cxl/core/core.h       |  2 +
> > >   drivers/cxl/core/pci.c        | 62 +++++++++++++++++++++++++++++++
> > >   drivers/cxl/core/regs.c       |  1 -
> > >   drivers/cxl/cxl.h             |  2 -
> > >   drivers/cxl/cxlpci.h          |  2 +
> > >   drivers/cxl/pci.c             | 70 -----------------------------------
> > >   include/cxl/pci.h             | 13 +++++++
> > >   tools/testing/cxl/Kbuild      |  1 -
> > >   tools/testing/cxl/test/mock.c | 17 ---------
> > The commit log doesn't mention these cxl/test changes.
> > Why are these done?
> 
> 
> If I recall this right, moving the code has the effect of not requiring this
> code anymore.
> 
> 
> This comes from Dan's work for fixing the problem with that code moving.

BTW - It works fine, I just see no comment noting that the wrapper can
be removed because this function was 'elevated' out of the core? And I'm
not sure that is a good explanation.


> 
> 
> > 
> > > index af2594e4f35d..3c6a071fbbe3 100644
> > > --- a/tools/testing/cxl/test/mock.c
> > > +++ b/tools/testing/cxl/test/mock.c
> > > @@ -268,23 +268,6 @@ struct cxl_dport *__wrap_devm_cxl_add_rch_dport(struct cxl_port *port,
> > >   }
> > >   EXPORT_SYMBOL_NS_GPL(__wrap_devm_cxl_add_rch_dport, "CXL");
> > > -resource_size_t __wrap_cxl_rcd_component_reg_phys(struct device *dev,
> > > -						  struct cxl_dport *dport)
> > > -{
> > > -	int index;
> > > -	resource_size_t component_reg_phys;
> > > -	struct cxl_mock_ops *ops = get_cxl_mock_ops(&index);
> > > -
> > > -	if (ops && ops->is_mock_port(dev))
> > > -		component_reg_phys = CXL_RESOURCE_NONE;
> > > -	else
> > > -		component_reg_phys = cxl_rcd_component_reg_phys(dev, dport);
> > > -	put_cxl_mock_ops(index);
> > > -
> > > -	return component_reg_phys;
> > > -}
> > > -EXPORT_SYMBOL_NS_GPL(__wrap_cxl_rcd_component_reg_phys, "CXL");
> > > -
> > >   void __wrap_cxl_endpoint_parse_cdat(struct cxl_port *port)
> > >   {
> > >   	int index;
> > > -- 
> > > 2.34.1
> > > 
> > > 
>