diff mbox series

[v3,09/20] cxl: support type2 memdev creation

Message ID 20240907081836.5801-10-alejandro.lucero-palau@amd.com (mailing list archive)
State Changes Requested
Delegated to: Netdev Maintainers
Headers show
Series cxl: add Type2 device support | expand

Checks

Context Check Description
netdev/series_format fail Series longer than 15 patches
netdev/tree_selection success Guessed tree name to be net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 18 this patch: 18
netdev/build_tools success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 9 maintainers not CCed: alison.schofield@intel.com vishal.l.verma@intel.com linux-net-drivers@amd.com habetsm.xilinx@gmail.com jonathan.cameron@huawei.com dave.jiang@intel.com ira.weiny@intel.com dave@stgolabs.net ecree.xilinx@gmail.com
netdev/build_clang success Errors and warnings before: 18 this patch: 18
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 18 this patch: 18
netdev/checkpatch warning WARNING: line length of 81 exceeds 80 columns WARNING: line length of 82 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

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

Add memdev creation from sfc driver.

Current cxl core is relying on a CXL_DEVTYPE_CLASSMEM type device when
creating a memdev leading to problems when obtaining cxl_memdev_state
references from a CXL_DEVTYPE_DEVMEM type. This last device type is
managed by a specific vendor driver and does not need same sysfs files
since not userspace intervention is expected. This patch checks for the
right device type in those functions using cxl_memdev_state.

Signed-off-by: Alejandro Lucero <alucerop@amd.com>
---
 drivers/cxl/core/cdat.c            |  3 +++
 drivers/cxl/core/memdev.c          |  9 +++++++++
 drivers/cxl/mem.c                  | 17 +++++++++++------
 drivers/net/ethernet/sfc/efx_cxl.c |  7 +++++++
 include/linux/cxl/cxl.h            |  2 ++
 5 files changed, 32 insertions(+), 6 deletions(-)

Comments

Dave Jiang Sept. 12, 2024, 6:19 p.m. UTC | #1 
On 9/7/24 1:18 AM, alejandro.lucero-palau@amd.com wrote:
> From: Alejandro Lucero <alucerop@amd.com>
> 
> Add memdev creation from sfc driver.
> 
> Current cxl core is relying on a CXL_DEVTYPE_CLASSMEM type device when
> creating a memdev leading to problems when obtaining cxl_memdev_state
> references from a CXL_DEVTYPE_DEVMEM type. This last device type is
> managed by a specific vendor driver and does not need same sysfs files
> since not userspace intervention is expected. This patch checks for the
> right device type in those functions using cxl_memdev_state.
> 
> Signed-off-by: Alejandro Lucero <alucerop@amd.com>
> ---
>  drivers/cxl/core/cdat.c            |  3 +++
>  drivers/cxl/core/memdev.c          |  9 +++++++++
>  drivers/cxl/mem.c                  | 17 +++++++++++------
>  drivers/net/ethernet/sfc/efx_cxl.c |  7 +++++++
>  include/linux/cxl/cxl.h            |  2 ++
>  5 files changed, 32 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/cxl/core/cdat.c b/drivers/cxl/core/cdat.c
> index bb83867d9fec..0d4679c137d4 100644
> --- a/drivers/cxl/core/cdat.c
> +++ b/drivers/cxl/core/cdat.c
> @@ -558,6 +558,9 @@ void cxl_region_perf_data_calculate(struct cxl_region *cxlr,
>  	};
>  	struct cxl_dpa_perf *perf;
>  
> +	if (!mds)
> +		return;
> +
>  	switch (cxlr->mode) {
>  	case CXL_DECODER_RAM:
>  		perf = &mds->ram_perf;
> diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c
> index 836faf09b328..5f8418620b70 100644
> --- a/drivers/cxl/core/memdev.c
> +++ b/drivers/cxl/core/memdev.c
> @@ -468,6 +468,9 @@ static umode_t cxl_ram_visible(struct kobject *kobj, struct attribute *a, int n)
>  	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
>  	struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
>  
> +	if (!mds)
> +		return 0;

I think instead of altering the sysfs visible attributes, what you really want is to not register the unwanted group attributes. Or basically only register the cxl_memdev_attribute_group and not the other ones. Otherwise it gets really messy. And whomever adds future attributes need to also remember the special case. I think you can refer to core/port.c and look at the different decoder types as inspiration for creating different memdev types where it has cxl_decoder_base_attribute_group and then tack on specific attribute groups.

DJ 

> +
>  	if (a == &dev_attr_ram_qos_class.attr)
>  		if (mds->ram_perf.qos_class == CXL_QOS_CLASS_INVALID)
>  			return 0;
> @@ -487,6 +490,9 @@ static umode_t cxl_pmem_visible(struct kobject *kobj, struct attribute *a, int n
>  	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
>  	struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
>  
> +	if (!mds)
> +		return 0;
> +
>  	if (a == &dev_attr_pmem_qos_class.attr)
>  		if (mds->pmem_perf.qos_class == CXL_QOS_CLASS_INVALID)
>  			return 0;
> @@ -507,6 +513,9 @@ static umode_t cxl_memdev_security_visible(struct kobject *kobj,
>  	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
>  	struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
>  
> +	if (!mds)
> +		return 0;
> +
>  	if (a == &dev_attr_security_sanitize.attr &&
>  	    !test_bit(CXL_SEC_ENABLED_SANITIZE, mds->security.enabled_cmds))
>  		return 0;
> diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c
> index 7de232eaeb17..5c7ad230bccb 100644
> --- a/drivers/cxl/mem.c
> +++ b/drivers/cxl/mem.c
> @@ -131,12 +131,14 @@ static int cxl_mem_probe(struct device *dev)
>  	dentry = cxl_debugfs_create_dir(dev_name(dev));
>  	debugfs_create_devm_seqfile(dev, "dpamem", dentry, cxl_mem_dpa_show);
>  
> -	if (test_bit(CXL_POISON_ENABLED_INJECT, mds->poison.enabled_cmds))
> -		debugfs_create_file("inject_poison", 0200, dentry, cxlmd,
> -				    &cxl_poison_inject_fops);
> -	if (test_bit(CXL_POISON_ENABLED_CLEAR, mds->poison.enabled_cmds))
> -		debugfs_create_file("clear_poison", 0200, dentry, cxlmd,
> -				    &cxl_poison_clear_fops);
> +	if (mds) {
> +		if (test_bit(CXL_POISON_ENABLED_INJECT, mds->poison.enabled_cmds))
> +			debugfs_create_file("inject_poison", 0200, dentry, cxlmd,
> +					    &cxl_poison_inject_fops);
> +		if (test_bit(CXL_POISON_ENABLED_CLEAR, mds->poison.enabled_cmds))
> +			debugfs_create_file("clear_poison", 0200, dentry, cxlmd,
> +					    &cxl_poison_clear_fops);
> +	}
>  
>  	rc = devm_add_action_or_reset(dev, remove_debugfs, dentry);
>  	if (rc)
> @@ -222,6 +224,9 @@ static umode_t cxl_mem_visible(struct kobject *kobj, struct attribute *a, int n)
>  	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
>  	struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
>  
> +	if (!mds)
> +		return 0;
> +
>  	if (a == &dev_attr_trigger_poison_list.attr)
>  		if (!test_bit(CXL_POISON_ENABLED_LIST,
>  			      mds->poison.enabled_cmds))
> diff --git a/drivers/net/ethernet/sfc/efx_cxl.c b/drivers/net/ethernet/sfc/efx_cxl.c
> index 14fab41fe10a..899bc823a212 100644
> --- a/drivers/net/ethernet/sfc/efx_cxl.c
> +++ b/drivers/net/ethernet/sfc/efx_cxl.c
> @@ -83,6 +83,13 @@ int efx_cxl_init(struct efx_nic *efx)
>  	 */
>  	cxl_set_media_ready(cxl->cxlds);
>  
> +	cxl->cxlmd = devm_cxl_add_memdev(&pci_dev->dev, cxl->cxlds);
> +	if (IS_ERR(cxl->cxlmd)) {
> +		pci_err(pci_dev, "CXL accel memdev creation failed");
> +		rc = PTR_ERR(cxl->cxlmd);
> +		goto err;
> +	}
> +
>  	return 0;
>  err:
>  	kfree(cxl->cxlds);
> diff --git a/include/linux/cxl/cxl.h b/include/linux/cxl/cxl.h
> index 08723b2d75bc..fc0859f841dc 100644
> --- a/include/linux/cxl/cxl.h
> +++ b/include/linux/cxl/cxl.h
> @@ -55,4 +55,6 @@ int cxl_pci_accel_setup_regs(struct pci_dev *pdev, struct cxl_dev_state *cxlds);
>  int cxl_request_resource(struct cxl_dev_state *cxlds, enum cxl_resource type);
>  int cxl_release_resource(struct cxl_dev_state *cxlds, enum cxl_resource type);
>  void cxl_set_media_ready(struct cxl_dev_state *cxlds);
> +struct cxl_memdev *devm_cxl_add_memdev(struct device *host,
> +				       struct cxl_dev_state *cxlds);
>  #endif
Alejandro Lucero Palau Sept. 16, 2024, 12:38 p.m. UTC | #2 
On 9/12/24 19:19, Dave Jiang wrote:
>
> On 9/7/24 1:18 AM, alejandro.lucero-palau@amd.com wrote:
>> From: Alejandro Lucero <alucerop@amd.com>
>>
>> Add memdev creation from sfc driver.
>>
>> Current cxl core is relying on a CXL_DEVTYPE_CLASSMEM type device when
>> creating a memdev leading to problems when obtaining cxl_memdev_state
>> references from a CXL_DEVTYPE_DEVMEM type. This last device type is
>> managed by a specific vendor driver and does not need same sysfs files
>> since not userspace intervention is expected. This patch checks for the
>> right device type in those functions using cxl_memdev_state.
>>
>> Signed-off-by: Alejandro Lucero <alucerop@amd.com>
>> ---
>>   drivers/cxl/core/cdat.c            |  3 +++
>>   drivers/cxl/core/memdev.c          |  9 +++++++++
>>   drivers/cxl/mem.c                  | 17 +++++++++++------
>>   drivers/net/ethernet/sfc/efx_cxl.c |  7 +++++++
>>   include/linux/cxl/cxl.h            |  2 ++
>>   5 files changed, 32 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/cxl/core/cdat.c b/drivers/cxl/core/cdat.c
>> index bb83867d9fec..0d4679c137d4 100644
>> --- a/drivers/cxl/core/cdat.c
>> +++ b/drivers/cxl/core/cdat.c
>> @@ -558,6 +558,9 @@ void cxl_region_perf_data_calculate(struct cxl_region *cxlr,
>>   	};
>>   	struct cxl_dpa_perf *perf;
>>   
>> +	if (!mds)
>> +		return;
>> +
>>   	switch (cxlr->mode) {
>>   	case CXL_DECODER_RAM:
>>   		perf = &mds->ram_perf;
>> diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c
>> index 836faf09b328..5f8418620b70 100644
>> --- a/drivers/cxl/core/memdev.c
>> +++ b/drivers/cxl/core/memdev.c
>> @@ -468,6 +468,9 @@ static umode_t cxl_ram_visible(struct kobject *kobj, struct attribute *a, int n)
>>   	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
>>   	struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
>>   
>> +	if (!mds)
>> +		return 0;
> I think instead of altering the sysfs visible attributes, what you really want is to not register the unwanted group attributes. Or basically only register the cxl_memdev_attribute_group and not the other ones. Otherwise it gets really messy. And whomever adds future attributes need to also remember the special case. I think you can refer to core/port.c and look at the different decoder types as inspiration for creating different memdev types where it has cxl_decoder_base_attribute_group and then tack on specific attribute groups.
>
> DJ


I think you are right. It was a quick fix for having things working and 
not thought about it in detail.

I'll do and fix it for v4.

Thanks!


>> +
>>   	if (a == &dev_attr_ram_qos_class.attr)
>>   		if (mds->ram_perf.qos_class == CXL_QOS_CLASS_INVALID)
>>   			return 0;
>> @@ -487,6 +490,9 @@ static umode_t cxl_pmem_visible(struct kobject *kobj, struct attribute *a, int n
>>   	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
>>   	struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
>>   
>> +	if (!mds)
>> +		return 0;
>> +
>>   	if (a == &dev_attr_pmem_qos_class.attr)
>>   		if (mds->pmem_perf.qos_class == CXL_QOS_CLASS_INVALID)
>>   			return 0;
>> @@ -507,6 +513,9 @@ static umode_t cxl_memdev_security_visible(struct kobject *kobj,
>>   	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
>>   	struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
>>   
>> +	if (!mds)
>> +		return 0;
>> +
>>   	if (a == &dev_attr_security_sanitize.attr &&
>>   	    !test_bit(CXL_SEC_ENABLED_SANITIZE, mds->security.enabled_cmds))
>>   		return 0;
>> diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c
>> index 7de232eaeb17..5c7ad230bccb 100644
>> --- a/drivers/cxl/mem.c
>> +++ b/drivers/cxl/mem.c
>> @@ -131,12 +131,14 @@ static int cxl_mem_probe(struct device *dev)
>>   	dentry = cxl_debugfs_create_dir(dev_name(dev));
>>   	debugfs_create_devm_seqfile(dev, "dpamem", dentry, cxl_mem_dpa_show);
>>   
>> -	if (test_bit(CXL_POISON_ENABLED_INJECT, mds->poison.enabled_cmds))
>> -		debugfs_create_file("inject_poison", 0200, dentry, cxlmd,
>> -				    &cxl_poison_inject_fops);
>> -	if (test_bit(CXL_POISON_ENABLED_CLEAR, mds->poison.enabled_cmds))
>> -		debugfs_create_file("clear_poison", 0200, dentry, cxlmd,
>> -				    &cxl_poison_clear_fops);
>> +	if (mds) {
>> +		if (test_bit(CXL_POISON_ENABLED_INJECT, mds->poison.enabled_cmds))
>> +			debugfs_create_file("inject_poison", 0200, dentry, cxlmd,
>> +					    &cxl_poison_inject_fops);
>> +		if (test_bit(CXL_POISON_ENABLED_CLEAR, mds->poison.enabled_cmds))
>> +			debugfs_create_file("clear_poison", 0200, dentry, cxlmd,
>> +					    &cxl_poison_clear_fops);
>> +	}
>>   
>>   	rc = devm_add_action_or_reset(dev, remove_debugfs, dentry);
>>   	if (rc)
>> @@ -222,6 +224,9 @@ static umode_t cxl_mem_visible(struct kobject *kobj, struct attribute *a, int n)
>>   	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
>>   	struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
>>   
>> +	if (!mds)
>> +		return 0;
>> +
>>   	if (a == &dev_attr_trigger_poison_list.attr)
>>   		if (!test_bit(CXL_POISON_ENABLED_LIST,
>>   			      mds->poison.enabled_cmds))
>> diff --git a/drivers/net/ethernet/sfc/efx_cxl.c b/drivers/net/ethernet/sfc/efx_cxl.c
>> index 14fab41fe10a..899bc823a212 100644
>> --- a/drivers/net/ethernet/sfc/efx_cxl.c
>> +++ b/drivers/net/ethernet/sfc/efx_cxl.c
>> @@ -83,6 +83,13 @@ int efx_cxl_init(struct efx_nic *efx)
>>   	 */
>>   	cxl_set_media_ready(cxl->cxlds);
>>   
>> +	cxl->cxlmd = devm_cxl_add_memdev(&pci_dev->dev, cxl->cxlds);
>> +	if (IS_ERR(cxl->cxlmd)) {
>> +		pci_err(pci_dev, "CXL accel memdev creation failed");
>> +		rc = PTR_ERR(cxl->cxlmd);
>> +		goto err;
>> +	}
>> +
>>   	return 0;
>>   err:
>>   	kfree(cxl->cxlds);
>> diff --git a/include/linux/cxl/cxl.h b/include/linux/cxl/cxl.h
>> index 08723b2d75bc..fc0859f841dc 100644
>> --- a/include/linux/cxl/cxl.h
>> +++ b/include/linux/cxl/cxl.h
>> @@ -55,4 +55,6 @@ int cxl_pci_accel_setup_regs(struct pci_dev *pdev, struct cxl_dev_state *cxlds);
>>   int cxl_request_resource(struct cxl_dev_state *cxlds, enum cxl_resource type);
>>   int cxl_release_resource(struct cxl_dev_state *cxlds, enum cxl_resource type);
>>   void cxl_set_media_ready(struct cxl_dev_state *cxlds);
>> +struct cxl_memdev *devm_cxl_add_memdev(struct device *host,
>> +				       struct cxl_dev_state *cxlds);
>>   #endif
diff mbox series

Patch

diff --git a/drivers/cxl/core/cdat.c b/drivers/cxl/core/cdat.c
index bb83867d9fec..0d4679c137d4 100644
--- a/drivers/cxl/core/cdat.c
+++ b/drivers/cxl/core/cdat.c
@@ -558,6 +558,9 @@  void cxl_region_perf_data_calculate(struct cxl_region *cxlr,
 	};
 	struct cxl_dpa_perf *perf;
 
+	if (!mds)
+		return;
+
 	switch (cxlr->mode) {
 	case CXL_DECODER_RAM:
 		perf = &mds->ram_perf;
diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c
index 836faf09b328..5f8418620b70 100644
--- a/drivers/cxl/core/memdev.c
+++ b/drivers/cxl/core/memdev.c
@@ -468,6 +468,9 @@  static umode_t cxl_ram_visible(struct kobject *kobj, struct attribute *a, int n)
 	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
 	struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
 
+	if (!mds)
+		return 0;
+
 	if (a == &dev_attr_ram_qos_class.attr)
 		if (mds->ram_perf.qos_class == CXL_QOS_CLASS_INVALID)
 			return 0;
@@ -487,6 +490,9 @@  static umode_t cxl_pmem_visible(struct kobject *kobj, struct attribute *a, int n
 	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
 	struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
 
+	if (!mds)
+		return 0;
+
 	if (a == &dev_attr_pmem_qos_class.attr)
 		if (mds->pmem_perf.qos_class == CXL_QOS_CLASS_INVALID)
 			return 0;
@@ -507,6 +513,9 @@  static umode_t cxl_memdev_security_visible(struct kobject *kobj,
 	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
 	struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
 
+	if (!mds)
+		return 0;
+
 	if (a == &dev_attr_security_sanitize.attr &&
 	    !test_bit(CXL_SEC_ENABLED_SANITIZE, mds->security.enabled_cmds))
 		return 0;
diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c
index 7de232eaeb17..5c7ad230bccb 100644
--- a/drivers/cxl/mem.c
+++ b/drivers/cxl/mem.c
@@ -131,12 +131,14 @@  static int cxl_mem_probe(struct device *dev)
 	dentry = cxl_debugfs_create_dir(dev_name(dev));
 	debugfs_create_devm_seqfile(dev, "dpamem", dentry, cxl_mem_dpa_show);
 
-	if (test_bit(CXL_POISON_ENABLED_INJECT, mds->poison.enabled_cmds))
-		debugfs_create_file("inject_poison", 0200, dentry, cxlmd,
-				    &cxl_poison_inject_fops);
-	if (test_bit(CXL_POISON_ENABLED_CLEAR, mds->poison.enabled_cmds))
-		debugfs_create_file("clear_poison", 0200, dentry, cxlmd,
-				    &cxl_poison_clear_fops);
+	if (mds) {
+		if (test_bit(CXL_POISON_ENABLED_INJECT, mds->poison.enabled_cmds))
+			debugfs_create_file("inject_poison", 0200, dentry, cxlmd,
+					    &cxl_poison_inject_fops);
+		if (test_bit(CXL_POISON_ENABLED_CLEAR, mds->poison.enabled_cmds))
+			debugfs_create_file("clear_poison", 0200, dentry, cxlmd,
+					    &cxl_poison_clear_fops);
+	}
 
 	rc = devm_add_action_or_reset(dev, remove_debugfs, dentry);
 	if (rc)
@@ -222,6 +224,9 @@  static umode_t cxl_mem_visible(struct kobject *kobj, struct attribute *a, int n)
 	struct cxl_memdev *cxlmd = to_cxl_memdev(dev);
 	struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds);
 
+	if (!mds)
+		return 0;
+
 	if (a == &dev_attr_trigger_poison_list.attr)
 		if (!test_bit(CXL_POISON_ENABLED_LIST,
 			      mds->poison.enabled_cmds))
diff --git a/drivers/net/ethernet/sfc/efx_cxl.c b/drivers/net/ethernet/sfc/efx_cxl.c
index 14fab41fe10a..899bc823a212 100644
--- a/drivers/net/ethernet/sfc/efx_cxl.c
+++ b/drivers/net/ethernet/sfc/efx_cxl.c
@@ -83,6 +83,13 @@  int efx_cxl_init(struct efx_nic *efx)
 	 */
 	cxl_set_media_ready(cxl->cxlds);
 
+	cxl->cxlmd = devm_cxl_add_memdev(&pci_dev->dev, cxl->cxlds);
+	if (IS_ERR(cxl->cxlmd)) {
+		pci_err(pci_dev, "CXL accel memdev creation failed");
+		rc = PTR_ERR(cxl->cxlmd);
+		goto err;
+	}
+
 	return 0;
 err:
 	kfree(cxl->cxlds);
diff --git a/include/linux/cxl/cxl.h b/include/linux/cxl/cxl.h
index 08723b2d75bc..fc0859f841dc 100644
--- a/include/linux/cxl/cxl.h
+++ b/include/linux/cxl/cxl.h
@@ -55,4 +55,6 @@  int cxl_pci_accel_setup_regs(struct pci_dev *pdev, struct cxl_dev_state *cxlds);
 int cxl_request_resource(struct cxl_dev_state *cxlds, enum cxl_resource type);
 int cxl_release_resource(struct cxl_dev_state *cxlds, enum cxl_resource type);
 void cxl_set_media_ready(struct cxl_dev_state *cxlds);
+struct cxl_memdev *devm_cxl_add_memdev(struct device *host,
+				       struct cxl_dev_state *cxlds);
 #endif