diff mbox series

[v3,05/20] cxl: add function for type2 cxl regs setup

Message ID 20240907081836.5801-6-alejandro.lucero-palau@amd.com
State New
Headers show
Series cxl: add Type2 device support | expand

Commit Message

Lucero Palau, Alejandro Sept. 7, 2024, 8:18 a.m. UTC 
From: Alejandro Lucero <alucerop@amd.com>

Create a new function for a type2 device initialising
cxl_dev_state struct regarding cxl regs setup and mapping.

Signed-off-by: Alejandro Lucero <alucerop@amd.com>
---
 drivers/cxl/core/pci.c             | 30 ++++++++++++++++++++++++++++++
 drivers/net/ethernet/sfc/efx_cxl.c |  6 ++++++
 include/linux/cxl/cxl.h            |  2 ++
 3 files changed, 38 insertions(+)

Comments

Li, Ming4 Sept. 10, 2024, 6 a.m. UTC | #1 
On 9/7/2024 4:18 PM, alejandro.lucero-palau@amd.com wrote:
> From: Alejandro Lucero <alucerop@amd.com>
>
> Create a new function for a type2 device initialising
> cxl_dev_state struct regarding cxl regs setup and mapping.
>
> Signed-off-by: Alejandro Lucero <alucerop@amd.com>
> ---
>  drivers/cxl/core/pci.c             | 30 ++++++++++++++++++++++++++++++
>  drivers/net/ethernet/sfc/efx_cxl.c |  6 ++++++
>  include/linux/cxl/cxl.h            |  2 ++
>  3 files changed, 38 insertions(+)
>
> diff --git a/drivers/cxl/core/pci.c b/drivers/cxl/core/pci.c
> index bf57f081ef8f..9afcdd643866 100644
> --- a/drivers/cxl/core/pci.c
> +++ b/drivers/cxl/core/pci.c
> @@ -1142,6 +1142,36 @@ int cxl_pci_setup_regs(struct pci_dev *pdev, enum cxl_regloc_type type,
>  }
>  EXPORT_SYMBOL_NS_GPL(cxl_pci_setup_regs, CXL);
>  
> +int cxl_pci_accel_setup_regs(struct pci_dev *pdev, struct cxl_dev_state *cxlds)
> +{
> +	struct cxl_register_map map;
> +	int rc;
> +
> +	rc = cxl_pci_setup_regs(pdev, CXL_REGLOC_RBI_MEMDEV, &map,
> +				&cxlds->capabilities);
> +	if (!rc) {
> +		rc = cxl_map_device_regs(&map, &cxlds->regs.device_regs);
> +		if (rc)
> +			return rc;
> +	}
> +
> +	rc = cxl_pci_setup_regs(pdev, CXL_REGLOC_RBI_COMPONENT,
> +				&cxlds->reg_map, &cxlds->capabilities);
> +	if (rc)
> +		dev_warn(&pdev->dev, "No component registers (%d)\n", rc);
> +
> +	if (cxlds->capabilities & BIT(CXL_CM_CAP_CAP_ID_RAS)) {
> +		rc = cxl_map_component_regs(&cxlds->reg_map,
> +					    &cxlds->regs.component,
> +					    BIT(CXL_CM_CAP_CAP_ID_RAS));
> +		if (rc)
> +			dev_dbg(&pdev->dev, "Failed to map RAS capability.\n");
> +	}
> +
> +	return rc;
> +}
> +EXPORT_SYMBOL_NS_GPL(cxl_pci_accel_setup_regs, CXL);
> +

I thought this function should be implemented in efx driver, just like what cxl_pci driver does, because I think it is not a generic setup flow for all CXL type-2 devices.


>  bool cxl_pci_check_caps(struct cxl_dev_state *cxlds, u32 expected_caps,
>  			u32 *current_caps)
>  {
> diff --git a/drivers/net/ethernet/sfc/efx_cxl.c b/drivers/net/ethernet/sfc/efx_cxl.c
> index bba36cbbab22..fee143e94c1f 100644
> --- a/drivers/net/ethernet/sfc/efx_cxl.c
> +++ b/drivers/net/ethernet/sfc/efx_cxl.c
> @@ -66,6 +66,12 @@ int efx_cxl_init(struct efx_nic *efx)
>  		goto err;
>  	}
>  
> +	rc = cxl_pci_accel_setup_regs(pci_dev, cxl->cxlds);
> +	if (rc) {
> +		pci_err(pci_dev, "CXL accel setup regs failed");
> +		goto err;
> +	}
> +
>  	return 0;
>  err:
>  	kfree(cxl->cxlds);
> diff --git a/include/linux/cxl/cxl.h b/include/linux/cxl/cxl.h
> index 4a57bf60403d..f2dcba6cdc22 100644
> --- a/include/linux/cxl/cxl.h
> +++ b/include/linux/cxl/cxl.h
> @@ -5,6 +5,7 @@
>  #define __CXL_H
>  
>  #include <linux/device.h>
> +#include <linux/pci.h>
>  
>  enum cxl_resource {
>  	CXL_ACCEL_RES_DPA,
> @@ -50,4 +51,5 @@ int cxl_set_resource(struct cxl_dev_state *cxlds, struct resource res,
>  		     enum cxl_resource);
>  bool cxl_pci_check_caps(struct cxl_dev_state *cxlds, u32 expected_caps,
>  			u32 *current_caps);
> +int cxl_pci_accel_setup_regs(struct pci_dev *pdev, struct cxl_dev_state *cxlds);
>  #endif
Alejandro Lucero Palau Sept. 10, 2024, 7:24 a.m. UTC | #2 
On 9/10/24 07:00, Li, Ming4 wrote:
> On 9/7/2024 4:18 PM, alejandro.lucero-palau@amd.com wrote:
>> From: Alejandro Lucero <alucerop@amd.com>
>>
>> Create a new function for a type2 device initialising
>> cxl_dev_state struct regarding cxl regs setup and mapping.
>>
>> Signed-off-by: Alejandro Lucero <alucerop@amd.com>
>> ---
>>   drivers/cxl/core/pci.c             | 30 ++++++++++++++++++++++++++++++
>>   drivers/net/ethernet/sfc/efx_cxl.c |  6 ++++++
>>   include/linux/cxl/cxl.h            |  2 ++
>>   3 files changed, 38 insertions(+)
>>
>> diff --git a/drivers/cxl/core/pci.c b/drivers/cxl/core/pci.c
>> index bf57f081ef8f..9afcdd643866 100644
>> --- a/drivers/cxl/core/pci.c
>> +++ b/drivers/cxl/core/pci.c
>> @@ -1142,6 +1142,36 @@ int cxl_pci_setup_regs(struct pci_dev *pdev, enum cxl_regloc_type type,
>>   }
>>   EXPORT_SYMBOL_NS_GPL(cxl_pci_setup_regs, CXL);
>>   
>> +int cxl_pci_accel_setup_regs(struct pci_dev *pdev, struct cxl_dev_state *cxlds)
>> +{
>> +	struct cxl_register_map map;
>> +	int rc;
>> +
>> +	rc = cxl_pci_setup_regs(pdev, CXL_REGLOC_RBI_MEMDEV, &map,
>> +				&cxlds->capabilities);
>> +	if (!rc) {
>> +		rc = cxl_map_device_regs(&map, &cxlds->regs.device_regs);
>> +		if (rc)
>> +			return rc;
>> +	}
>> +
>> +	rc = cxl_pci_setup_regs(pdev, CXL_REGLOC_RBI_COMPONENT,
>> +				&cxlds->reg_map, &cxlds->capabilities);
>> +	if (rc)
>> +		dev_warn(&pdev->dev, "No component registers (%d)\n", rc);
>> +
>> +	if (cxlds->capabilities & BIT(CXL_CM_CAP_CAP_ID_RAS)) {
>> +		rc = cxl_map_component_regs(&cxlds->reg_map,
>> +					    &cxlds->regs.component,
>> +					    BIT(CXL_CM_CAP_CAP_ID_RAS));
>> +		if (rc)
>> +			dev_dbg(&pdev->dev, "Failed to map RAS capability.\n");
>> +	}
>> +
>> +	return rc;
>> +}
>> +EXPORT_SYMBOL_NS_GPL(cxl_pci_accel_setup_regs, CXL);
>> +
> I thought this function should be implemented in efx driver, just like what cxl_pci driver does, because I think it is not a generic setup flow for all CXL type-2 devices.
>

The idea here is to have a single function for discovering the 
registers, both Device and Component registers. If an accel has not all 
of them, as in the sfc case, not a problem with the last changes added.

Keeping with the idea of avoiding an accel driver to manipulate 
cxl_dev_state, this accessor is created.


>>   bool cxl_pci_check_caps(struct cxl_dev_state *cxlds, u32 expected_caps,
>>   			u32 *current_caps)
>>   {
>> diff --git a/drivers/net/ethernet/sfc/efx_cxl.c b/drivers/net/ethernet/sfc/efx_cxl.c
>> index bba36cbbab22..fee143e94c1f 100644
>> --- a/drivers/net/ethernet/sfc/efx_cxl.c
>> +++ b/drivers/net/ethernet/sfc/efx_cxl.c
>> @@ -66,6 +66,12 @@ int efx_cxl_init(struct efx_nic *efx)
>>   		goto err;
>>   	}
>>   
>> +	rc = cxl_pci_accel_setup_regs(pci_dev, cxl->cxlds);
>> +	if (rc) {
>> +		pci_err(pci_dev, "CXL accel setup regs failed");
>> +		goto err;
>> +	}
>> +
>>   	return 0;
>>   err:
>>   	kfree(cxl->cxlds);
>> diff --git a/include/linux/cxl/cxl.h b/include/linux/cxl/cxl.h
>> index 4a57bf60403d..f2dcba6cdc22 100644
>> --- a/include/linux/cxl/cxl.h
>> +++ b/include/linux/cxl/cxl.h
>> @@ -5,6 +5,7 @@
>>   #define __CXL_H
>>   
>>   #include <linux/device.h>
>> +#include <linux/pci.h>
>>   
>>   enum cxl_resource {
>>   	CXL_ACCEL_RES_DPA,
>> @@ -50,4 +51,5 @@ int cxl_set_resource(struct cxl_dev_state *cxlds, struct resource res,
>>   		     enum cxl_resource);
>>   bool cxl_pci_check_caps(struct cxl_dev_state *cxlds, u32 expected_caps,
>>   			u32 *current_caps);
>> +int cxl_pci_accel_setup_regs(struct pci_dev *pdev, struct cxl_dev_state *cxlds);
>>   #endif
>
Zhi Wang Sept. 12, 2024, 9:08 a.m. UTC | #3 
On Tue, 10 Sep 2024 08:24:33 +0100
Alejandro Lucero Palau <alucerop@amd.com> wrote:

> 
> On 9/10/24 07:00, Li, Ming4 wrote:
> > On 9/7/2024 4:18 PM, alejandro.lucero-palau@amd.com wrote:
> >> From: Alejandro Lucero <alucerop@amd.com>
> >>
> >> Create a new function for a type2 device initialising
> >> cxl_dev_state struct regarding cxl regs setup and mapping.
> >>
> >> Signed-off-by: Alejandro Lucero <alucerop@amd.com>
> >> ---
> >>   drivers/cxl/core/pci.c             | 30
> >> ++++++++++++++++++++++++++++++ drivers/net/ethernet/sfc/efx_cxl.c
> >> |  6 ++++++ include/linux/cxl/cxl.h            |  2 ++
> >>   3 files changed, 38 insertions(+)
> >>
> >> diff --git a/drivers/cxl/core/pci.c b/drivers/cxl/core/pci.c
> >> index bf57f081ef8f..9afcdd643866 100644
> >> --- a/drivers/cxl/core/pci.c
> >> +++ b/drivers/cxl/core/pci.c
> >> @@ -1142,6 +1142,36 @@ int cxl_pci_setup_regs(struct pci_dev
> >> *pdev, enum cxl_regloc_type type, }
> >>   EXPORT_SYMBOL_NS_GPL(cxl_pci_setup_regs, CXL);
> >>   
> >> +int cxl_pci_accel_setup_regs(struct pci_dev *pdev, struct
> >> cxl_dev_state *cxlds) +{
> >> +	struct cxl_register_map map;
> >> +	int rc;
> >> +
> >> +	rc = cxl_pci_setup_regs(pdev, CXL_REGLOC_RBI_MEMDEV, &map,
> >> +				&cxlds->capabilities);
> >> +	if (!rc) {
> >> +		rc = cxl_map_device_regs(&map,
> >> &cxlds->regs.device_regs);
> >> +		if (rc)
> >> +			return rc;
> >> +	}
> >> +
> >> +	rc = cxl_pci_setup_regs(pdev, CXL_REGLOC_RBI_COMPONENT,
> >> +				&cxlds->reg_map,
> >> &cxlds->capabilities);
> >> +	if (rc)
> >> +		dev_warn(&pdev->dev, "No component registers
> >> (%d)\n", rc); +
> >> +	if (cxlds->capabilities & BIT(CXL_CM_CAP_CAP_ID_RAS)) {
> >> +		rc = cxl_map_component_regs(&cxlds->reg_map,
> >> +
> >> &cxlds->regs.component,
> >> +
> >> BIT(CXL_CM_CAP_CAP_ID_RAS));
> >> +		if (rc)
> >> +			dev_dbg(&pdev->dev, "Failed to map RAS
> >> capability.\n");
> >> +	}
> >> +
> >> +	return rc;
> >> +}
> >> +EXPORT_SYMBOL_NS_GPL(cxl_pci_accel_setup_regs, CXL);
> >> +
> > I thought this function should be implemented in efx driver, just
> > like what cxl_pci driver does, because I think it is not a generic
> > setup flow for all CXL type-2 devices.
> >
> 
> The idea here is to have a single function for discovering the 
> registers, both Device and Component registers. If an accel has not
> all of them, as in the sfc case, not a problem with the last changes
> added.
> 
> Keeping with the idea of avoiding an accel driver to manipulate 
> cxl_dev_state, this accessor is created.
>

Agree. Let's keep this function.
 
> 
> >>   bool cxl_pci_check_caps(struct cxl_dev_state *cxlds, u32
> >> expected_caps, u32 *current_caps)
> >>   {
> >> diff --git a/drivers/net/ethernet/sfc/efx_cxl.c
> >> b/drivers/net/ethernet/sfc/efx_cxl.c index
> >> bba36cbbab22..fee143e94c1f 100644 ---
> >> a/drivers/net/ethernet/sfc/efx_cxl.c +++
> >> b/drivers/net/ethernet/sfc/efx_cxl.c @@ -66,6 +66,12 @@ int
> >> efx_cxl_init(struct efx_nic *efx) goto err;
> >>   	}
> >>   
> >> +	rc = cxl_pci_accel_setup_regs(pci_dev, cxl->cxlds);
> >> +	if (rc) {
> >> +		pci_err(pci_dev, "CXL accel setup regs failed");
> >> +		goto err;
> >> +	}
> >> +
> >>   	return 0;
> >>   err:
> >>   	kfree(cxl->cxlds);
> >> diff --git a/include/linux/cxl/cxl.h b/include/linux/cxl/cxl.h
> >> index 4a57bf60403d..f2dcba6cdc22 100644
> >> --- a/include/linux/cxl/cxl.h
> >> +++ b/include/linux/cxl/cxl.h
> >> @@ -5,6 +5,7 @@
> >>   #define __CXL_H
> >>   
> >>   #include <linux/device.h>
> >> +#include <linux/pci.h>
> >>   
> >>   enum cxl_resource {
> >>   	CXL_ACCEL_RES_DPA,
> >> @@ -50,4 +51,5 @@ int cxl_set_resource(struct cxl_dev_state
> >> *cxlds, struct resource res, enum cxl_resource);
> >>   bool cxl_pci_check_caps(struct cxl_dev_state *cxlds, u32
> >> expected_caps, u32 *current_caps);
> >> +int cxl_pci_accel_setup_regs(struct pci_dev *pdev, struct
> >> cxl_dev_state *cxlds); #endif
> >
>
Jonathan Cameron Sept. 13, 2024, 5:32 p.m. UTC | #4 
On Sat, 7 Sep 2024 09:18:21 +0100
<alejandro.lucero-palau@amd.com> wrote:

> From: Alejandro Lucero <alucerop@amd.com>
> 
> Create a new function for a type2 device initialising
> cxl_dev_state struct regarding cxl regs setup and mapping.
> 
> Signed-off-by: Alejandro Lucero <alucerop@amd.com>
> ---
>  drivers/cxl/core/pci.c             | 30 ++++++++++++++++++++++++++++++
>  drivers/net/ethernet/sfc/efx_cxl.c |  6 ++++++
>  include/linux/cxl/cxl.h            |  2 ++
>  3 files changed, 38 insertions(+)
> 
> diff --git a/drivers/cxl/core/pci.c b/drivers/cxl/core/pci.c
> index bf57f081ef8f..9afcdd643866 100644
> --- a/drivers/cxl/core/pci.c
> +++ b/drivers/cxl/core/pci.c
> @@ -1142,6 +1142,36 @@ int cxl_pci_setup_regs(struct pci_dev *pdev, enum cxl_regloc_type type,
>  }
>  EXPORT_SYMBOL_NS_GPL(cxl_pci_setup_regs, CXL);
>  
> +int cxl_pci_accel_setup_regs(struct pci_dev *pdev, struct cxl_dev_state *cxlds)
> +{
> +	struct cxl_register_map map;
> +	int rc;
> +
> +	rc = cxl_pci_setup_regs(pdev, CXL_REGLOC_RBI_MEMDEV, &map,
> +				&cxlds->capabilities);
> +	if (!rc) {

I'd be tempted to wrap these two up in a separate function called
from here as the out of line good path is less than ideal from
readability point of view.

> +		rc = cxl_map_device_regs(&map, &cxlds->regs.device_regs);
> +		if (rc)
> +			return rc;
> +	}
> +
> +	rc = cxl_pci_setup_regs(pdev, CXL_REGLOC_RBI_COMPONENT,
> +				&cxlds->reg_map, &cxlds->capabilities);
> +	if (rc)
> +		dev_warn(&pdev->dev, "No component registers (%d)\n", rc);
> +
> +	if (cxlds->capabilities & BIT(CXL_CM_CAP_CAP_ID_RAS)) {

If there are no component registers this isn't going to work yet this
tries anyway?

> +		rc = cxl_map_component_regs(&cxlds->reg_map,
> +					    &cxlds->regs.component,
> +					    BIT(CXL_CM_CAP_CAP_ID_RAS));
> +		if (rc)
> +			dev_dbg(&pdev->dev, "Failed to map RAS capability.\n");
> +	}
> +
> +	return rc;
> +}
> +EXPORT_SYMBOL_NS_GPL(cxl_pci_accel_setup_regs, CXL);
> +
Alejandro Lucero Palau Sept. 16, 2024, 12:23 p.m. UTC | #5 
On 9/13/24 18:32, Jonathan Cameron wrote:
> On Sat, 7 Sep 2024 09:18:21 +0100
> <alejandro.lucero-palau@amd.com> wrote:
>
>> From: Alejandro Lucero <alucerop@amd.com>
>>
>> Create a new function for a type2 device initialising
>> cxl_dev_state struct regarding cxl regs setup and mapping.
>>
>> Signed-off-by: Alejandro Lucero <alucerop@amd.com>
>> ---
>>   drivers/cxl/core/pci.c             | 30 ++++++++++++++++++++++++++++++
>>   drivers/net/ethernet/sfc/efx_cxl.c |  6 ++++++
>>   include/linux/cxl/cxl.h            |  2 ++
>>   3 files changed, 38 insertions(+)
>>
>> diff --git a/drivers/cxl/core/pci.c b/drivers/cxl/core/pci.c
>> index bf57f081ef8f..9afcdd643866 100644
>> --- a/drivers/cxl/core/pci.c
>> +++ b/drivers/cxl/core/pci.c
>> @@ -1142,6 +1142,36 @@ int cxl_pci_setup_regs(struct pci_dev *pdev, enum cxl_regloc_type type,
>>   }
>>   EXPORT_SYMBOL_NS_GPL(cxl_pci_setup_regs, CXL);
>>   
>> +int cxl_pci_accel_setup_regs(struct pci_dev *pdev, struct cxl_dev_state *cxlds)
>> +{
>> +	struct cxl_register_map map;
>> +	int rc;
>> +
>> +	rc = cxl_pci_setup_regs(pdev, CXL_REGLOC_RBI_MEMDEV, &map,
>> +				&cxlds->capabilities);
>> +	if (!rc) {
> I'd be tempted to wrap these two up in a separate function called
> from here as the out of line good path is less than ideal from
> readability point of view.


OK. It makes sense.


>> +		rc = cxl_map_device_regs(&map, &cxlds->regs.device_regs);
>> +		if (rc)
>> +			return rc;
>> +	}
>> +
>> +	rc = cxl_pci_setup_regs(pdev, CXL_REGLOC_RBI_COMPONENT,
>> +				&cxlds->reg_map, &cxlds->capabilities);
>> +	if (rc)
>> +		dev_warn(&pdev->dev, "No component registers (%d)\n", rc);
>> +
>> +	if (cxlds->capabilities & BIT(CXL_CM_CAP_CAP_ID_RAS)) {
> If there are no component registers this isn't going to work yet this
> tries anyway?


Right. I should return if no component registers.

Thanks!


>> +		rc = cxl_map_component_regs(&cxlds->reg_map,
>> +					    &cxlds->regs.component,
>> +					    BIT(CXL_CM_CAP_CAP_ID_RAS));
>> +		if (rc)
>> +			dev_dbg(&pdev->dev, "Failed to map RAS capability.\n");
>> +	}
>> +
>> +	return rc;
>> +}
>> +EXPORT_SYMBOL_NS_GPL(cxl_pci_accel_setup_regs, CXL);
>> +
diff mbox series

Patch

diff --git a/drivers/cxl/core/pci.c b/drivers/cxl/core/pci.c
index bf57f081ef8f..9afcdd643866 100644
--- a/drivers/cxl/core/pci.c
+++ b/drivers/cxl/core/pci.c
@@ -1142,6 +1142,36 @@  int cxl_pci_setup_regs(struct pci_dev *pdev, enum cxl_regloc_type type,
 }
 EXPORT_SYMBOL_NS_GPL(cxl_pci_setup_regs, CXL);
 
+int cxl_pci_accel_setup_regs(struct pci_dev *pdev, struct cxl_dev_state *cxlds)
+{
+	struct cxl_register_map map;
+	int rc;
+
+	rc = cxl_pci_setup_regs(pdev, CXL_REGLOC_RBI_MEMDEV, &map,
+				&cxlds->capabilities);
+	if (!rc) {
+		rc = cxl_map_device_regs(&map, &cxlds->regs.device_regs);
+		if (rc)
+			return rc;
+	}
+
+	rc = cxl_pci_setup_regs(pdev, CXL_REGLOC_RBI_COMPONENT,
+				&cxlds->reg_map, &cxlds->capabilities);
+	if (rc)
+		dev_warn(&pdev->dev, "No component registers (%d)\n", rc);
+
+	if (cxlds->capabilities & BIT(CXL_CM_CAP_CAP_ID_RAS)) {
+		rc = cxl_map_component_regs(&cxlds->reg_map,
+					    &cxlds->regs.component,
+					    BIT(CXL_CM_CAP_CAP_ID_RAS));
+		if (rc)
+			dev_dbg(&pdev->dev, "Failed to map RAS capability.\n");
+	}
+
+	return rc;
+}
+EXPORT_SYMBOL_NS_GPL(cxl_pci_accel_setup_regs, CXL);
+
 bool cxl_pci_check_caps(struct cxl_dev_state *cxlds, u32 expected_caps,
 			u32 *current_caps)
 {
diff --git a/drivers/net/ethernet/sfc/efx_cxl.c b/drivers/net/ethernet/sfc/efx_cxl.c
index bba36cbbab22..fee143e94c1f 100644
--- a/drivers/net/ethernet/sfc/efx_cxl.c
+++ b/drivers/net/ethernet/sfc/efx_cxl.c
@@ -66,6 +66,12 @@  int efx_cxl_init(struct efx_nic *efx)
 		goto err;
 	}
 
+	rc = cxl_pci_accel_setup_regs(pci_dev, cxl->cxlds);
+	if (rc) {
+		pci_err(pci_dev, "CXL accel setup regs failed");
+		goto err;
+	}
+
 	return 0;
 err:
 	kfree(cxl->cxlds);
diff --git a/include/linux/cxl/cxl.h b/include/linux/cxl/cxl.h
index 4a57bf60403d..f2dcba6cdc22 100644
--- a/include/linux/cxl/cxl.h
+++ b/include/linux/cxl/cxl.h
@@ -5,6 +5,7 @@ 
 #define __CXL_H
 
 #include <linux/device.h>
+#include <linux/pci.h>
 
 enum cxl_resource {
 	CXL_ACCEL_RES_DPA,
@@ -50,4 +51,5 @@  int cxl_set_resource(struct cxl_dev_state *cxlds, struct resource res,
 		     enum cxl_resource);
 bool cxl_pci_check_caps(struct cxl_dev_state *cxlds, u32 expected_caps,
 			u32 *current_caps);
+int cxl_pci_accel_setup_regs(struct pci_dev *pdev, struct cxl_dev_state *cxlds);
 #endif