diff mbox series

[v2,14/15] cxl: add function for obtaining params from a region

Message ID 20240715172835.24757-15-alejandro.lucero-palau@amd.com (mailing list archive)
State Not Applicable
Headers show
Series cxl: add Type2 device support | expand

Commit Message

Lucero Palau, Alejandro July 15, 2024, 5:28 p.m. UTC 
From: Alejandro Lucero <alucerop@amd.com>

A CXL region struct contains the physical address to work with.

Add a function for given a opaque cxl region struct returns the params
to be used for mapping such memory range.

Signed-off-by: Alejandro Lucero <alucerop@amd.com>
---
 drivers/cxl/core/region.c     | 16 ++++++++++++++++
 drivers/cxl/cxl.h             |  3 +++
 include/linux/cxl_accel_mem.h |  2 ++
 3 files changed, 21 insertions(+)

Comments

Zhi Wang Aug. 9, 2024, 3:24 p.m. UTC | #1 
On Mon, 15 Jul 2024 18:28:34 +0100
<alejandro.lucero-palau@amd.com> wrote:

> From: Alejandro Lucero <alucerop@amd.com>
> 
> A CXL region struct contains the physical address to work with.
> 
> Add a function for given a opaque cxl region struct returns the params
> to be used for mapping such memory range.
> 
> Signed-off-by: Alejandro Lucero <alucerop@amd.com>
> ---
>  drivers/cxl/core/region.c     | 16 ++++++++++++++++
>  drivers/cxl/cxl.h             |  3 +++
>  include/linux/cxl_accel_mem.h |  2 ++
>  3 files changed, 21 insertions(+)
> 
> diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
> index c8fc14ac437e..9ff10923e9fc 100644
> --- a/drivers/cxl/core/region.c
> +++ b/drivers/cxl/core/region.c
> @@ -3345,6 +3345,22 @@ static int devm_cxl_add_dax_region(struct
> cxl_region *cxlr) return rc;
>  }
>  
> +int cxl_accel_get_region_params(struct cxl_region *region,
> +				resource_size_t *start,
> resource_size_t *end) +{
> +	if (!region)
> +		return -ENODEV;
> +
> +	if (!region->params.res) {
> +		return -ENODEV;
> +	}

Remove the extra {}

> +	*start = region->params.res->start;
> +	*end = region->params.res->end;
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_NS_GPL(cxl_accel_get_region_params, CXL);
> +
>  static int match_root_decoder_by_range(struct device *dev, void
> *data) {
>  	struct range *r1, *r2 = data;
> diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h
> index 1bf3b74ff959..b4c4c4455ef1 100644
> --- a/drivers/cxl/cxl.h
> +++ b/drivers/cxl/cxl.h
> @@ -906,6 +906,9 @@ void cxl_coordinates_combine(struct
> access_coordinate *out, bool
> cxl_endpoint_decoder_reset_detected(struct cxl_port *port); 
>  int cxl_region_detach(struct cxl_endpoint_decoder *cxled);
> +
> +int cxl_accel_get_region_params(struct cxl_region *region,
> +				resource_size_t *start,
> resource_size_t *end); /*
>   * Unit test builds overrides this to __weak, find the 'strong'
> version
>   * of these symbols in tools/testing/cxl/.
> diff --git a/include/linux/cxl_accel_mem.h
> b/include/linux/cxl_accel_mem.h index a5f9ffc24509..5d715eea6e91
> 100644 --- a/include/linux/cxl_accel_mem.h
> +++ b/include/linux/cxl_accel_mem.h
> @@ -53,4 +53,6 @@ struct cxl_region *cxl_create_region(struct
> cxl_root_decoder *cxlrd, int ways);
>  
>  int cxl_region_detach(struct cxl_endpoint_decoder *cxled);
> +int cxl_accel_get_region_params(struct cxl_region *region,
> +				resource_size_t *start,
> resource_size_t *end); #endif
Alejandro Lucero Palau Aug. 19, 2024, 4:14 p.m. UTC | #2 
On 8/9/24 16:24, Zhi Wang wrote:
> On Mon, 15 Jul 2024 18:28:34 +0100
> <alejandro.lucero-palau@amd.com> wrote:
>
>> From: Alejandro Lucero <alucerop@amd.com>
>>
>> A CXL region struct contains the physical address to work with.
>>
>> Add a function for given a opaque cxl region struct returns the params
>> to be used for mapping such memory range.
>>
>> Signed-off-by: Alejandro Lucero <alucerop@amd.com>
>> ---
>>   drivers/cxl/core/region.c     | 16 ++++++++++++++++
>>   drivers/cxl/cxl.h             |  3 +++
>>   include/linux/cxl_accel_mem.h |  2 ++
>>   3 files changed, 21 insertions(+)
>>
>> diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
>> index c8fc14ac437e..9ff10923e9fc 100644
>> --- a/drivers/cxl/core/region.c
>> +++ b/drivers/cxl/core/region.c
>> @@ -3345,6 +3345,22 @@ static int devm_cxl_add_dax_region(struct
>> cxl_region *cxlr) return rc;
>>   }
>>   
>> +int cxl_accel_get_region_params(struct cxl_region *region,
>> +				resource_size_t *start,
>> resource_size_t *end) +{
>> +	if (!region)
>> +		return -ENODEV;
>> +
>> +	if (!region->params.res) {
>> +		return -ENODEV;
>> +	}
> Remove the extra {}
>

Sure.

Thanks!


>> +	*start = region->params.res->start;
>> +	*end = region->params.res->end;
>> +
>> +	return 0;
>> +}
>> +EXPORT_SYMBOL_NS_GPL(cxl_accel_get_region_params, CXL);
>> +
>>   static int match_root_decoder_by_range(struct device *dev, void
>> *data) {
>>   	struct range *r1, *r2 = data;
>> diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h
>> index 1bf3b74ff959..b4c4c4455ef1 100644
>> --- a/drivers/cxl/cxl.h
>> +++ b/drivers/cxl/cxl.h
>> @@ -906,6 +906,9 @@ void cxl_coordinates_combine(struct
>> access_coordinate *out, bool
>> cxl_endpoint_decoder_reset_detected(struct cxl_port *port);
>>   int cxl_region_detach(struct cxl_endpoint_decoder *cxled);
>> +
>> +int cxl_accel_get_region_params(struct cxl_region *region,
>> +				resource_size_t *start,
>> resource_size_t *end); /*
>>    * Unit test builds overrides this to __weak, find the 'strong'
>> version
>>    * of these symbols in tools/testing/cxl/.
>> diff --git a/include/linux/cxl_accel_mem.h
>> b/include/linux/cxl_accel_mem.h index a5f9ffc24509..5d715eea6e91
>> 100644 --- a/include/linux/cxl_accel_mem.h
>> +++ b/include/linux/cxl_accel_mem.h
>> @@ -53,4 +53,6 @@ struct cxl_region *cxl_create_region(struct
>> cxl_root_decoder *cxlrd, int ways);
>>   
>>   int cxl_region_detach(struct cxl_endpoint_decoder *cxled);
>> +int cxl_accel_get_region_params(struct cxl_region *region,
>> +				resource_size_t *start,
>> resource_size_t *end); #endif
diff mbox series

Patch

diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c
index c8fc14ac437e..9ff10923e9fc 100644
--- a/drivers/cxl/core/region.c
+++ b/drivers/cxl/core/region.c
@@ -3345,6 +3345,22 @@  static int devm_cxl_add_dax_region(struct cxl_region *cxlr)
 	return rc;
 }
 
+int cxl_accel_get_region_params(struct cxl_region *region,
+				resource_size_t *start, resource_size_t *end)
+{
+	if (!region)
+		return -ENODEV;
+
+	if (!region->params.res) {
+		return -ENODEV;
+	}
+	*start = region->params.res->start;
+	*end = region->params.res->end;
+
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(cxl_accel_get_region_params, CXL);
+
 static int match_root_decoder_by_range(struct device *dev, void *data)
 {
 	struct range *r1, *r2 = data;
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h
index 1bf3b74ff959..b4c4c4455ef1 100644
--- a/drivers/cxl/cxl.h
+++ b/drivers/cxl/cxl.h
@@ -906,6 +906,9 @@  void cxl_coordinates_combine(struct access_coordinate *out,
 bool cxl_endpoint_decoder_reset_detected(struct cxl_port *port);
 
 int cxl_region_detach(struct cxl_endpoint_decoder *cxled);
+
+int cxl_accel_get_region_params(struct cxl_region *region,
+				resource_size_t *start, resource_size_t *end);
 /*
  * Unit test builds overrides this to __weak, find the 'strong' version
  * of these symbols in tools/testing/cxl/.
diff --git a/include/linux/cxl_accel_mem.h b/include/linux/cxl_accel_mem.h
index a5f9ffc24509..5d715eea6e91 100644
--- a/include/linux/cxl_accel_mem.h
+++ b/include/linux/cxl_accel_mem.h
@@ -53,4 +53,6 @@  struct cxl_region *cxl_create_region(struct cxl_root_decoder *cxlrd,
 				     int ways);
 
 int cxl_region_detach(struct cxl_endpoint_decoder *cxled);
+int cxl_accel_get_region_params(struct cxl_region *region,
+				resource_size_t *start, resource_size_t *end);
 #endif