netdev - Re: [PATCH v10 01/26] cxl: make memdev creation type agnostic

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Message-ID: <c4da5f36-ad30-44a4-bb1e-6f51ebbea588@amd.com>
Date: Mon, 17 Feb 2025 13:06:34 +0000
From: Alejandro Lucero Palau <alucerop@....com>
To: Alison Schofield <alison.schofield@...el.com>
Cc: 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
Subject: Re: [PATCH v10 01/26] cxl: make memdev creation type agnostic


On 2/13/25 03:57, Alison Schofield wrote:
> On Wed, Feb 05, 2025 at 03:19:25PM +0000, alucerop@....com wrote:
>> From: Alejandro Lucero <alucerop@....com>
>>
>> In preparation for Type2 support, change memdev creation making
>> type based on argument.
>>
>> Integrate initialization of dvsec and serial fields in the related
>> cxl_dev_state within same function creating the memdev.
>>
>> Move the code from mbox file to memdev file.
>>
>> Add new header files with type2 required definitions for memdev
>> state creation.
>>
>> Signed-off-by: Alejandro Lucero <alucerop@....com>
>> ---
>>   drivers/cxl/core/mbox.c   | 20 --------------------
>>   drivers/cxl/core/memdev.c | 23 +++++++++++++++++++++++
>>   drivers/cxl/cxlmem.h      | 18 +++---------------
>>   drivers/cxl/cxlpci.h      | 17 +----------------
>>   drivers/cxl/pci.c         | 16 +++++++++-------
>>   include/cxl/cxl.h         | 26 ++++++++++++++++++++++++++
>>   include/cxl/pci.h         | 23 +++++++++++++++++++++++
>>   7 files changed, 85 insertions(+), 58 deletions(-)
>>   create mode 100644 include/cxl/cxl.h
>>   create mode 100644 include/cxl/pci.h
>>
>> diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c
>> index 4d22bb731177..96155b8af535 100644
>> --- a/drivers/cxl/core/mbox.c
>> +++ b/drivers/cxl/core/mbox.c
>> @@ -1435,26 +1435,6 @@ int cxl_mailbox_init(struct cxl_mailbox *cxl_mbox, struct device *host)
>>   }
>>   EXPORT_SYMBOL_NS_GPL(cxl_mailbox_init, "CXL");
>>   
>> -struct cxl_memdev_state *cxl_memdev_state_create(struct device *dev)
>> -{
>> -	struct cxl_memdev_state *mds;
>> -
>> -	mds = devm_kzalloc(dev, sizeof(*mds), GFP_KERNEL);
>> -	if (!mds) {
>> -		dev_err(dev, "No memory available\n");
>> -		return ERR_PTR(-ENOMEM);
>> -	}
>> -
>> -	mutex_init(&mds->event.log_lock);
>> -	mds->cxlds.dev = dev;
>> -	mds->cxlds.reg_map.host = dev;
>> -	mds->cxlds.reg_map.resource = CXL_RESOURCE_NONE;
>> -	mds->cxlds.type = CXL_DEVTYPE_CLASSMEM;
>> -
>> -	return mds;
>> -}
>> -EXPORT_SYMBOL_NS_GPL(cxl_memdev_state_create, "CXL");
>> -
>>   void __init cxl_mbox_init(void)
>>   {
>>   	struct dentry *mbox_debugfs;
>> diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c
>> index 63c6c681125d..456d505f1bc8 100644
>> --- a/drivers/cxl/core/memdev.c
>> +++ b/drivers/cxl/core/memdev.c
>> @@ -632,6 +632,29 @@ static void detach_memdev(struct work_struct *work)
>>   
>>   static struct lock_class_key cxl_memdev_key;
>>   
>> +struct cxl_memdev_state *cxl_memdev_state_create(struct device *dev, u64 serial,
>> +						 u16 dvsec, enum cxl_devtype type)
>> +{
>> +	struct cxl_memdev_state *mds;
>> +
>> +	mds = devm_kzalloc(dev, sizeof(*mds), GFP_KERNEL);
>> +	if (!mds) {
>> +		dev_err(dev, "No memory available\n");
>> +		return ERR_PTR(-ENOMEM);
>> +	}
> I know you are only the 'mover' of the above code, but can
> you drop the dev_err message. OOM messages from the core are
> typically enough.
>

Sure. I'll do so.