From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jason Wang Subject: Re: [PATCH 6/7] ifcvf: replace irq_request/free with helpers in vDPA core. Date: Wed, 15 Jul 2020 18:04:11 +0800 Message-ID: References: <1594565366-3195-1-git-send-email-lingshan.zhu@intel.com> <1594565366-3195-6-git-send-email-lingshan.zhu@intel.com> <09e67c20-dda1-97a2-1858-6a543c64fba6@redhat.com> <20200715055538-mutt-send-email-mst@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20200715055538-mutt-send-email-mst@kernel.org> Content-Language: en-US Sender: netdev-owner@vger.kernel.org To: "Michael S. Tsirkin" Cc: "Zhu, Lingshan" , alex.williamson@redhat.com, pbonzini@redhat.com, sean.j.christopherson@intel.com, wanpengli@tencent.com, virtualization@lists.linux-foundation.org, kvm@vger.kernel.org, netdev@vger.kernel.org, dan.daly@intel.com List-Id: virtualization@lists.linuxfoundation.org On 2020/7/15 下午6:01, Michael S. Tsirkin wrote: > On Wed, Jul 15, 2020 at 04:40:17PM +0800, Jason Wang wrote: >> On 2020/7/13 下午6:22, Zhu, Lingshan wrote: >>> On 7/13/2020 4:33 PM, Jason Wang wrote: >>>> On 2020/7/12 下午10:49, Zhu Lingshan wrote: >>>>> This commit replaced irq_request/free() with helpers in vDPA >>>>> core, so that it can request/free irq and setup irq offloading >>>>> on order. >>>>> >>>>> Signed-off-by: Zhu Lingshan >>>>> --- >>>>>   drivers/vdpa/ifcvf/ifcvf_main.c | 11 ++++++----- >>>>>   1 file changed, 6 insertions(+), 5 deletions(-) >>>>> >>>>> diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c >>>>> b/drivers/vdpa/ifcvf/ifcvf_main.c >>>>> index f5a60c1..65b84e1 100644 >>>>> --- a/drivers/vdpa/ifcvf/ifcvf_main.c >>>>> +++ b/drivers/vdpa/ifcvf/ifcvf_main.c >>>>> @@ -47,11 +47,12 @@ static void ifcvf_free_irq(struct >>>>> ifcvf_adapter *adapter, int queues) >>>>>   { >>>>>       struct pci_dev *pdev = adapter->pdev; >>>>>       struct ifcvf_hw *vf = &adapter->vf; >>>>> +    struct vdpa_device *vdpa = &adapter->vdpa; >>>>>       int i; >>>>>           for (i = 0; i < queues; i++) >>>>> -        devm_free_irq(&pdev->dev, vf->vring[i].irq, &vf->vring[i]); >>>>> +        vdpa_free_vq_irq(&pdev->dev, vdpa, vf->vring[i].irq, i, >>>>> &vf->vring[i]); >>>>>         ifcvf_free_irq_vectors(pdev); >>>>>   } >>>>> @@ -60,6 +61,7 @@ static int ifcvf_request_irq(struct >>>>> ifcvf_adapter *adapter) >>>>>   { >>>>>       struct pci_dev *pdev = adapter->pdev; >>>>>       struct ifcvf_hw *vf = &adapter->vf; >>>>> +    struct vdpa_device *vdpa = &adapter->vdpa; >>>>>       int vector, i, ret, irq; >>>>>         ret = pci_alloc_irq_vectors(pdev, IFCVF_MAX_INTR, >>>>> @@ -73,6 +75,7 @@ static int ifcvf_request_irq(struct >>>>> ifcvf_adapter *adapter) >>>>>            pci_name(pdev)); >>>>>       vector = 0; >>>>>       irq = pci_irq_vector(pdev, vector); >>>>> +    /* config interrupt */ >>>> Unnecessary changes. >>> This is to show we did not setup this irq offloading for config >>> interrupt, only setup irq offloading for data vq. But can remove this >>> since we have config_msix_name in code to show what it is >> Btw, any reason for not making config interrupt work for irq offloading? I >> don't see any thing that blocks this. >> >> Thanks > Well config accesses all go through userspace right? > Doing config interrupt directly would just be messy ... Right, so I think we need a better comment here. Thanks > >