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

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Message-ID: <2878ef8c-6ceb-4530-956e-92cc3504f9f3@intel.com>
Date: Wed, 11 Sep 2024 13:58:13 -0700
From: Dave Jiang <dave.jiang@...el.com>
To: Fenghua Yu <fenghua.yu@...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 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?

>  	{ 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?

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