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From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: Tiwei Bie <tiwei.bie@intel.com>
Cc: zhihong.wang@intel.com, amorenoz@redhat.com,
	xiao.w.wang@intel.com, dev@dpdk.org, jfreimann@redhat.com,
	stable@dpdk.org
Subject: Re: [dpdk-stable] [PATCH 08/15] net/virtio: add virtio vDPA op to get features
Date: Tue, 3 Sep 2019 09:27:38 +0200
Message-ID: <87a0f7ad-6df1-0027-5a98-f4db72ff4709@redhat.com> (raw)
In-Reply-To: <20190902064340.GA15111@___>



On 9/2/19 8:43 AM, Tiwei Bie wrote:
> On Thu, Aug 29, 2019 at 09:59:53AM +0200, Maxime Coquelin wrote:
>> This patch implements the vDPA .get_features() callback.
>>
>> Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
>> ---
>>  drivers/net/virtio/virtio_vdpa.c | 32 ++++++++++++++++++++++++++++++++
>>  1 file changed, 32 insertions(+)
>>
>> diff --git a/drivers/net/virtio/virtio_vdpa.c b/drivers/net/virtio/virtio_vdpa.c
>> index 07ff1e090..9e2af8313 100644
>> --- a/drivers/net/virtio/virtio_vdpa.c
>> +++ b/drivers/net/virtio/virtio_vdpa.c
>> @@ -173,8 +173,40 @@ virtio_vdpa_get_queue_num(int did, uint32_t *queue_num)
>>  	return 0;
>>  }
>>  
>> +static int
>> +virtio_vdpa_get_features(int did, uint64_t *features)
>> +{
>> +	struct internal_list *list;
>> +	struct virtio_vdpa_device *dev;
>> +
>> +	list = find_internal_resource_by_did(did);
>> +	if (list == NULL) {
>> +		DRV_LOG(ERR, "Invalid device id: %d", did);
>> +		return -1;
>> +	}
>> +
>> +	dev = list->dev;
>> +
>> +	*features = VTPCI_OPS(&dev->hw)->get_features(&dev->hw);
>> +
>> +	if (!(*features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))) {
>> +		DRV_LOG(ERR, "Device does not support IOMMU");
>> +		return -1;
>> +	}
>> +
>> +	if (*features & (1ULL << VIRTIO_NET_F_CTRL_VQ))
>> +		dev->has_ctrl_vq = true;
>> +	else
>> +		dev->has_ctrl_vq = false;
>> +
>> +	*features |= (1ULL << VHOST_USER_F_PROTOCOL_FEATURES);
> 
> We need to drop the VIRTIO_F_IOMMU_PLATFORM bit before
> reporting features to the upper layer as the vDPA backend
> doesn't support the vIOMMU yet.

Indeed, it just work for now because Virtio-user does not advertise
IOMMU feature.

> Regards,
> Tiwei
> 
> 
>> +
>> +	return 0;
>> +}
>> +
>>  static struct rte_vdpa_dev_ops virtio_vdpa_ops = {
>>  	.get_queue_num = virtio_vdpa_get_queue_num,
>> +	.get_features = virtio_vdpa_get_features,
>>  };
>>  
>>  static inline int
>> -- 
>> 2.21.0
>>

  reply index

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-29  7:59 [dpdk-stable] [PATCH 00/15] Introduce Virtio vDPA driver Maxime Coquelin
2019-08-29  7:59 ` [dpdk-stable] [PATCH 01/15] vhost: remove vhost kernel header inclusion Maxime Coquelin
2019-09-02  6:03   ` Tiwei Bie
2019-09-03  7:24     ` Maxime Coquelin
2019-08-29  7:59 ` [dpdk-stable] [PATCH 02/15] vhost: configure vDPA as soon as the device is ready Maxime Coquelin
2019-09-02  8:34   ` Ye Xiaolong
2019-09-02  9:02     ` Wang, Xiao W
2019-09-03  7:34       ` Maxime Coquelin
2019-09-03 10:58         ` Wang, Xiao W
2019-08-29  7:59 ` [dpdk-stable] [PATCH 03/15] net/virtio: move control path fonctions in virtqueue file Maxime Coquelin
2019-09-02  6:05   ` Tiwei Bie
2019-08-29  7:59 ` [dpdk-stable] [PATCH 04/15] net/virtio: add virtio PCI subsystem device ID declaration Maxime Coquelin
2019-09-02  6:14   ` Tiwei Bie
2019-09-03  7:25     ` Maxime Coquelin
2019-08-29  7:59 ` [dpdk-stable] [PATCH 05/15] net/virtio: save notify bar ID in virtio HW struct Maxime Coquelin
2019-09-02  6:17   ` Tiwei Bie
2019-08-29  7:59 ` [dpdk-stable] [PATCH 06/15] net/virtio: add skeleton for virtio vDPA driver Maxime Coquelin
2019-09-02  6:27   ` Tiwei Bie
2019-09-03  7:25     ` Maxime Coquelin
2019-08-29  7:59 ` [dpdk-stable] [PATCH 07/15] net/virtio: add vDPA ops to get number of queue Maxime Coquelin
2019-09-02  6:32   ` Tiwei Bie
2019-08-29  7:59 ` [dpdk-stable] [PATCH 08/15] net/virtio: add virtio vDPA op to get features Maxime Coquelin
2019-09-02  6:43   ` Tiwei Bie
2019-09-03  7:27     ` Maxime Coquelin [this message]
2019-08-29  7:59 ` [dpdk-stable] [PATCH 09/15] net/virtio: add virtio vDPA op to get protocol features Maxime Coquelin
2019-09-02  6:46   ` Tiwei Bie
2019-08-29  7:59 ` [dpdk-stable] [PATCH 10/15] net/virtio: add vDPA op to configure and start the device Maxime Coquelin
2019-09-03  5:30   ` Tiwei Bie
2019-09-03  7:40     ` Maxime Coquelin
2019-09-03  8:49       ` Tiwei Bie
2019-09-04  4:06         ` Jason Wang
2019-09-04  6:56           ` Maxime Coquelin
2019-09-05  2:57             ` Tiwei Bie
2019-08-29  7:59 ` [dpdk-stable] [PATCH 11/15] net/virtio: add vDPA op to stop and close " Maxime Coquelin
2019-09-02  7:07   ` Tiwei Bie
2019-09-03  7:30     ` Maxime Coquelin
2019-08-29  7:59 ` [dpdk-stable] [PATCH 12/15] net/virtio: add vDPA op to set features Maxime Coquelin
2019-08-29  7:59 ` [dpdk-stable] [PATCH 13/15] net/virtio: add vDPA ops to get VFIO FDs Maxime Coquelin
2019-09-03  4:47   ` Tiwei Bie
2019-08-29  7:59 ` [dpdk-stable] [PATCH 14/15] net/virtio: add vDPA op to get notification area Maxime Coquelin
2019-09-03  5:02   ` Tiwei Bie
2019-09-03  7:36     ` Maxime Coquelin
2019-09-03  8:40       ` Tiwei Bie
2019-08-29  8:00 ` [dpdk-stable] [PATCH 15/15] doc: add documentation for Virtio vDPA driver Maxime Coquelin
2019-09-09 11:55 ` [dpdk-stable] [dpdk-dev] [PATCH 00/15] Introduce " Shahaf Shuler
2019-09-10  7:46   ` Maxime Coquelin
2019-09-10 13:44     ` Shahaf Shuler
2019-09-10 13:56       ` Maxime Coquelin
2019-09-11  5:15         ` Shahaf Shuler
2019-09-11  7:15           ` Maxime Coquelin
2019-10-24  6:32 ` [dpdk-stable] " Maxime Coquelin

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