linux-kernel - Re: [PATCH v4 14/23] cxl/port: Remove Component Register base address from struct cxl

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Date:   Thu, 1 Jun 2023 14:27:18 +0100
From:   Jonathan Cameron <Jonathan.Cameron@...wei.com>
To:     Terry Bowman <terry.bowman@....com>
CC:     <alison.schofield@...el.com>, <vishal.l.verma@...el.com>,
        <ira.weiny@...el.com>, <bwidawsk@...nel.org>,
        <dan.j.williams@...el.com>, <dave.jiang@...el.com>,
        <linux-cxl@...r.kernel.org>, <rrichter@....com>,
        <linux-kernel@...r.kernel.org>, <bhelgaas@...gle.com>
Subject: Re: [PATCH v4 14/23] cxl/port: Remove Component Register base
 address from struct cxl_port

On Tue, 23 May 2023 18:22:05 -0500
Terry Bowman <terry.bowman@....com> wrote:

> From: Robert Richter <rrichter@....com>
> 
> The Component Register base address @component_reg_phys is no longer
> used after the rework of the Component Register setup which now uses
> struct member @comp_map instead. Remove the base address.
> 
> Signed-off-by: Robert Richter <rrichter@....com>
> Signed-off-by: Terry Bowman <terry.bowman@....com>

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

> ---
>  drivers/cxl/core/port.c | 4 +---
>  drivers/cxl/cxl.h       | 2 --
>  2 files changed, 1 insertion(+), 5 deletions(-)
> 
> diff --git a/drivers/cxl/core/port.c b/drivers/cxl/core/port.c
> index db2ba0c886e2..183f9f8548e2 100644
> --- a/drivers/cxl/core/port.c
> +++ b/drivers/cxl/core/port.c
> @@ -615,7 +615,6 @@ static int devm_cxl_link_parent_dport(struct device *host,
>  static struct lock_class_key cxl_port_key;
>  
>  static struct cxl_port *cxl_port_alloc(struct device *uport,
> -				       resource_size_t component_reg_phys,
>  				       struct cxl_dport *parent_dport)
>  {
>  	struct cxl_port *port;
> @@ -665,7 +664,6 @@ static struct cxl_port *cxl_port_alloc(struct device *uport,
>  	} else
>  		dev->parent = uport;
>  
> -	port->component_reg_phys = component_reg_phys;
>  	ida_init(&port->decoder_ida);
>  	port->hdm_end = -1;
>  	port->commit_end = -1;
> @@ -724,7 +722,7 @@ static struct cxl_port *__devm_cxl_add_port(struct device *host,
>  	struct device *dev;
>  	int rc;
>  
> -	port = cxl_port_alloc(uport, component_reg_phys, parent_dport);
> +	port = cxl_port_alloc(uport, parent_dport);
>  	if (IS_ERR(port))
>  		return port;
>  
> diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h
> index dc83c1d0396e..4365d46606df 100644
> --- a/drivers/cxl/cxl.h
> +++ b/drivers/cxl/cxl.h
> @@ -556,7 +556,6 @@ struct cxl_dax_region {
>   * @nr_dports: number of entries in @dports
>   * @hdm_end: track last allocated HDM decoder instance for allocation ordering
>   * @commit_end: cursor to track highest committed decoder for commit ordering
> - * @component_reg_phys: component register capability base address (optional)
>   * @dead: last ep has been removed, force port re-creation
>   * @depth: How deep this port is relative to the root. depth 0 is the root.
>   * @cdat: Cached CDAT data
> @@ -576,7 +575,6 @@ struct cxl_port {
>  	int nr_dports;
>  	int hdm_end;
>  	int commit_end;
> -	resource_size_t component_reg_phys;
>  	bool dead;
>  	unsigned int depth;
>  	struct cxl_cdat {