linux-kernel - Re: [PATCH V4 2/3] vDPA/ifcvf: enable Intel C5000X-PL virtio-block for vDPA

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Date:   Thu, 6 May 2021 11:11:36 +0800
From:   "Zhu, Lingshan" <lingshan.zhu@...el.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     jasowang@...hat.com, lulu@...hat.com, sgarzare@...hat.com,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V4 2/3] vDPA/ifcvf: enable Intel C5000X-PL virtio-block
 for vDPA



On 5/3/2021 4:47 PM, Michael S. Tsirkin wrote:
> On Mon, Apr 19, 2021 at 02:33:25PM +0800, Zhu Lingshan wrote:
>> This commit enabled Intel FPGA SmartNIC C5000X-PL virtio-block
>> for vDPA.
>>
>> Signed-off-by: Zhu Lingshan <lingshan.zhu@...el.com>
>> Reviewed-by: Stefano Garzarella <sgarzare@...hat.com>
>> Acked-by: Jason Wang <jasowang@...hat.com>
>> ---
>>   drivers/vdpa/ifcvf/ifcvf_base.h |  8 +++++++-
>>   drivers/vdpa/ifcvf/ifcvf_main.c | 19 ++++++++++++++++++-
>>   2 files changed, 25 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
>> index 1c04cd256fa7..0111bfdeb342 100644
>> --- a/drivers/vdpa/ifcvf/ifcvf_base.h
>> +++ b/drivers/vdpa/ifcvf/ifcvf_base.h
>> @@ -15,6 +15,7 @@
>>   #include <linux/pci_regs.h>
>>   #include <linux/vdpa.h>
>>   #include <uapi/linux/virtio_net.h>
>> +#include <uapi/linux/virtio_blk.h>
>>   #include <uapi/linux/virtio_config.h>
>>   #include <uapi/linux/virtio_pci.h>
>>   
>> @@ -28,7 +29,12 @@
>>   #define C5000X_PL_SUBSYS_VENDOR_ID	0x8086
>>   #define C5000X_PL_SUBSYS_DEVICE_ID	0x0001
>>   
>> -#define IFCVF_SUPPORTED_FEATURES \
>> +#define C5000X_PL_BLK_VENDOR_ID		0x1AF4
>
> Come on this is just PCI_VENDOR_ID_REDHAT_QUMRANET right?
Hi Michael,

I will re-use the predefined macro in next patches

#define C5000X_PL_BLK_VENDOR_ID	  PCI_VENDOR_ID_REDHAT_QUMRANET
#define C5000X_PL_BLK_SUBSYS_DEVICE_ID	VIRTIO_ID_BLOCK?

to keep the readabilities in probe().

>
>
>
>> +#define C5000X_PL_BLK_DEVICE_ID		0x1001
> 0x1001 is a transitional blk device from virtio spec too right? Let's add these to virtio_ids.h?
will update virtio_ids.h in next patchset.

Thanks
Zhu Lingshan
>
>> +#define C5000X_PL_BLK_SUBSYS_VENDOR_ID	0x8086
>> +#define C5000X_PL_BLK_SUBSYS_DEVICE_ID	0x0002
> VIRTIO_ID_BLOCK?
>
>> +
>> +#define IFCVF_NET_SUPPORTED_FEATURES \
>>   		((1ULL << VIRTIO_NET_F_MAC)			| \
>>   		 (1ULL << VIRTIO_F_ANY_LAYOUT)			| \
>>   		 (1ULL << VIRTIO_F_VERSION_1)			| \
>> diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
>> index 66927ec81fa5..9a4a6df91f08 100644
>> --- a/drivers/vdpa/ifcvf/ifcvf_main.c
>> +++ b/drivers/vdpa/ifcvf/ifcvf_main.c
>> @@ -168,10 +168,23 @@ static struct ifcvf_hw *vdpa_to_vf(struct vdpa_device *vdpa_dev)
>>   
>>   static u64 ifcvf_vdpa_get_features(struct vdpa_device *vdpa_dev)
>>   {
>> +	struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev);
>>   	struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
>> +	struct pci_dev *pdev = adapter->pdev;
>> +
>>   	u64 features;
>>   
>> -	features = ifcvf_get_features(vf) & IFCVF_SUPPORTED_FEATURES;
>> +	switch (vf->dev_type) {
>> +	case VIRTIO_ID_NET:
>> +		features = ifcvf_get_features(vf) & IFCVF_NET_SUPPORTED_FEATURES;
>> +		break;
>> +	case VIRTIO_ID_BLOCK:
>> +		features = ifcvf_get_features(vf);
>> +		break;
>> +	default:
>> +		features = 0;
>> +		IFCVF_ERR(pdev, "VIRTIO ID %u not supported\n", vf->dev_type);
>> +	}
>>   
>>   	return features;
>>   }
>> @@ -514,6 +527,10 @@ static struct pci_device_id ifcvf_pci_ids[] = {
>>   			 C5000X_PL_DEVICE_ID,
>>   			 C5000X_PL_SUBSYS_VENDOR_ID,
>>   			 C5000X_PL_SUBSYS_DEVICE_ID) },
>> +	{ PCI_DEVICE_SUB(C5000X_PL_BLK_VENDOR_ID,
>> +			 C5000X_PL_BLK_DEVICE_ID,
>> +			 C5000X_PL_BLK_SUBSYS_VENDOR_ID,
>> +			 C5000X_PL_BLK_SUBSYS_DEVICE_ID) },
>>   
>>   	{ 0 },
>>   };
>> -- 
>> 2.27.0