linux-kernel - Re: [PATCH] dmaengine: idxd: Add a new IAA device ID on Panther Lake family platforms

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Message-ID: <326a2bdb-d4cc-2cf7-d4a7-c2c84e222d10@intel.com>
Date: Wed, 11 Sep 2024 15:38:47 -0700
From: Fenghua Yu <fenghua.yu@...el.com>
To: Dave Jiang <dave.jiang@...el.com>, Vinod Koul <vkoul@...nel.org>
CC: <dmaengine@...r.kernel.org>, linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] dmaengine: idxd: Add a new IAA device ID on Panther Lake
 family platforms



On 9/11/24 13:58, Dave Jiang wrote:
> 
> 
> On 9/11/24 1:45 PM, Fenghua Yu wrote:
>> A new IAA device ID, 0xb02d, is introduced across all Panther Lake family
>> platforms. Add the device ID to the IDXD driver.
>>
>> Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
>> ---
>> Hi, Vinod,
>>
>> This patch is applied cleanly on the next branch in the dmaengine repo.
>>
>> The next branch already includes a few new DSA/IAA device IDs in IDXD
>> driver.
>>
>> Please check the patches and the reasons why the new IDs should be added:
>> https://lore.kernel.org/lkml/20240828233401.186007-1-fenghua.yu@intel.com/
>>
>>   drivers/dma/idxd/init.c | 2 ++
>>   include/linux/pci_ids.h | 1 +
>>   2 files changed, 3 insertions(+)
>>
>> diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
>> index 0f693b27879c..3ae494a7a706 100644
>> --- a/drivers/dma/idxd/init.c
>> +++ b/drivers/dma/idxd/init.c
>> @@ -78,6 +78,8 @@ static struct pci_device_id idxd_pci_tbl[] = {
>>   	{ PCI_DEVICE_DATA(INTEL, IAX_SPR0, &idxd_driver_data[IDXD_TYPE_IAX]) },
>>   	/* IAA on DMR platforms */
>>   	{ PCI_DEVICE_DATA(INTEL, IAA_DMR, &idxd_driver_data[IDXD_TYPE_IAX]) },
>> +	/* IAX PTL platforms */
>> +	{ PCI_DEVICE_DATA(INTEL, IAX_PTL, &idxd_driver_data[IDXD_TYPE_IAX]) },
> 
> Use IAA going forward?
Will fix it in v2.

> 
>>   	{ 0, }
>>   };
>>   MODULE_DEVICE_TABLE(pci, idxd_pci_tbl);
>> diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
>> index 8139231d0e86..e598d6ff58bf 100644
>> --- a/include/linux/pci_ids.h
>> +++ b/include/linux/pci_ids.h
>> @@ -3117,6 +3117,7 @@
>>   #define PCI_DEVICE_ID_INTEL_HDA_CNL_H	0xa348
>>   #define PCI_DEVICE_ID_INTEL_HDA_CML_S	0xa3f0
>>   #define PCI_DEVICE_ID_INTEL_HDA_LNL_P	0xa828
>> +#define PCI_DEVICE_ID_INTEL_IAX_PTL	0xb02d
> 
> What is using this devid beyond the driver that needs pci_ids.h addition?

No other usage beyond the driver. Will move it inside the driver.

> 
>>   #define PCI_DEVICE_ID_INTEL_S21152BB	0xb152
>>   #define PCI_DEVICE_ID_INTEL_HDA_BMG	0xe2f7
>>   #define PCI_DEVICE_ID_INTEL_HDA_PTL	0xe428

Thanks.

-Fenghua