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From: Jason Gunthorpe <jgg@nvidia.com>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Lu Baolu <baolu.lu@linux.intel.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Joerg Roedel <joro@8bytes.org>,
	Alex Williamson <alex.williamson@redhat.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Christoph Hellwig <hch@infradead.org>,
	Kevin Tian <kevin.tian@intel.com>,
	Ashok Raj <ashok.raj@intel.com>,
	kvm@vger.kernel.org, rafael@kernel.org,
	David Airlie <airlied@linux.ie>,
	linux-pci@vger.kernel.org,
	Thierry Reding <thierry.reding@gmail.com>,
	Diana Craciun <diana.craciun@oss.nxp.com>,
	Dmitry Osipenko <digetx@gmail.com>, Will Deacon <will@kernel.org>,
	Stuart Yoder <stuyoder@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Chaitanya Kulkarni <kch@nvidia.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Cornelia Huck <cohuck@redhat.com>,
	linux-kernel@vger.kernel.org, Li Yang <leoyang.li@nxp.com>,
	iommu@lists.linux-foundation.org,
	Jacob jun Pan <jacob.jun.pan@intel.com>,
	Daniel Vetter <daniel@ffwll.ch>,
	Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH v5 07/14] PCI: Add driver dma ownership management
Date: Wed, 23 Feb 2022 14:07:57 -0400	[thread overview]
Message-ID: <20220223180757.GB390403@nvidia.com> (raw)
In-Reply-To: <20220223180056.GA140951@bhelgaas>

On Wed, Feb 23, 2022 at 12:00:56PM -0600, Bjorn Helgaas wrote:

> >  static int pci_dma_configure(struct device *dev)
> >  {
> > +	struct pci_driver *driver = to_pci_driver(dev->driver);
> >  	struct device *bridge;
> >  	int ret = 0;
> >  
> > +	if (!driver->no_kernel_api_dma) {
> 
> Ugh.  Double negative, totally agree this needs a better name that
> reverses the sense.  Every place you use it, you negate it again.

Greg came up with driver_managed_dma which is in the v6 version:

https://lore.kernel.org/all/20220218005521.172832-5-baolu.lu@linux.intel.com/

Thanks,
Jason

WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe via iommu <iommu@lists.linux-foundation.org>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: kvm@vger.kernel.org, rafael@kernel.org,
	David Airlie <airlied@linux.ie>,
	linux-pci@vger.kernel.org,
	Thierry Reding <thierry.reding@gmail.com>,
	Diana Craciun <diana.craciun@oss.nxp.com>,
	Dmitry Osipenko <digetx@gmail.com>, Will Deacon <will@kernel.org>,
	Ashok Raj <ashok.raj@intel.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Christoph Hellwig <hch@infradead.org>,
	Stuart Yoder <stuyoder@gmail.com>,
	Kevin Tian <kevin.tian@intel.com>,
	Chaitanya Kulkarni <kch@nvidia.com>,
	Alex Williamson <alex.williamson@redhat.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Cornelia Huck <cohuck@redhat.com>,
	linux-kernel@vger.kernel.org, Li Yang <leoyang.li@nxp.com>,
	iommu@lists.linux-foundation.org,
	Jacob jun Pan <jacob.jun.pan@intel.com>,
	Daniel Vetter <daniel@ffwll.ch>,
	Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH v5 07/14] PCI: Add driver dma ownership management
Date: Wed, 23 Feb 2022 14:07:57 -0400	[thread overview]
Message-ID: <20220223180757.GB390403@nvidia.com> (raw)
In-Reply-To: <20220223180056.GA140951@bhelgaas>

On Wed, Feb 23, 2022 at 12:00:56PM -0600, Bjorn Helgaas wrote:

> >  static int pci_dma_configure(struct device *dev)
> >  {
> > +	struct pci_driver *driver = to_pci_driver(dev->driver);
> >  	struct device *bridge;
> >  	int ret = 0;
> >  
> > +	if (!driver->no_kernel_api_dma) {
> 
> Ugh.  Double negative, totally agree this needs a better name that
> reverses the sense.  Every place you use it, you negate it again.

Greg came up with driver_managed_dma which is in the v6 version:

https://lore.kernel.org/all/20220218005521.172832-5-baolu.lu@linux.intel.com/

Thanks,
Jason
_______________________________________________
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iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

  reply	other threads:[~2022-02-23 18:08 UTC|newest]

Thread overview: 112+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-04  1:56 [PATCH v5 00/14] Fix BUG_ON in vfio_iommu_group_notifier() Lu Baolu
2022-01-04  1:56 ` Lu Baolu
2022-01-04  1:56 ` [PATCH v5 01/14] iommu: Add dma ownership management interfaces Lu Baolu
2022-01-04  1:56   ` Lu Baolu
2022-01-04 10:08   ` Christoph Hellwig
2022-01-04 10:08     ` Christoph Hellwig
2022-01-04 16:41     ` Bjorn Helgaas
2022-01-04 16:41       ` Bjorn Helgaas
2022-01-04 19:23       ` Jason Gunthorpe
2022-01-04 19:23         ` Jason Gunthorpe via iommu
2022-01-06  3:18         ` Lu Baolu
2022-01-06  3:18           ` Lu Baolu
2022-01-06  3:54         ` Lu Baolu
2022-01-06  3:54           ` Lu Baolu
2022-01-06 15:46           ` Jason Gunthorpe
2022-01-06 15:46             ` Jason Gunthorpe via iommu
2022-01-07  1:50             ` Lu Baolu
2022-01-07  1:50               ` Lu Baolu
2022-01-06  3:43       ` Lu Baolu
2022-01-06  3:43         ` Lu Baolu
2022-01-06  3:47       ` Lu Baolu
2022-01-06  3:47         ` Lu Baolu
2022-01-06  3:51       ` Lu Baolu
2022-01-06  3:51         ` Lu Baolu
2022-01-05  6:57     ` Lu Baolu
2022-01-05  6:57       ` Lu Baolu
2022-01-04  1:56 ` [PATCH v5 02/14] driver core: Add dma_cleanup callback in bus_type Lu Baolu
2022-01-04  1:56   ` Lu Baolu
2022-01-04 10:08   ` Christoph Hellwig
2022-01-04 10:08     ` Christoph Hellwig
2022-01-04 12:39     ` Jason Gunthorpe
2022-01-04 12:39       ` Jason Gunthorpe via iommu
2022-01-04 13:04       ` Greg Kroah-Hartman
2022-01-04 13:04         ` Greg Kroah-Hartman
2022-02-08  5:55         ` Lu Baolu
2022-02-08  5:55           ` Lu Baolu
2022-02-08 11:35           ` Greg Kroah-Hartman
2022-02-08 11:35             ` Greg Kroah-Hartman
2022-02-14 10:01     ` Greg Kroah-Hartman
2022-02-14 10:01       ` Greg Kroah-Hartman
2022-02-14 10:02   ` Greg Kroah-Hartman
2022-02-14 10:02     ` Greg Kroah-Hartman
2022-01-04  1:56 ` [PATCH v5 03/14] amba: Stop sharing platform_dma_configure() Lu Baolu
2022-01-04  1:56   ` Lu Baolu
2022-01-04  1:56 ` [PATCH v5 04/14] driver core: platform: Add driver dma ownership management Lu Baolu
2022-01-04  1:56   ` Lu Baolu
2022-02-14  9:59   ` Greg Kroah-Hartman
2022-02-14  9:59     ` Greg Kroah-Hartman
2022-02-14 13:18     ` Jason Gunthorpe
2022-02-14 13:18       ` Jason Gunthorpe via iommu
2022-02-14 13:37       ` Greg Kroah-Hartman
2022-02-14 13:37         ` Greg Kroah-Hartman
2022-02-14 13:43         ` Jason Gunthorpe
2022-02-14 13:43           ` Jason Gunthorpe via iommu
2022-01-04  1:56 ` [PATCH v5 05/14] amba: " Lu Baolu
2022-01-04  1:56   ` Lu Baolu
2022-01-04  1:56 ` [PATCH v5 06/14] bus: fsl-mc: " Lu Baolu
2022-01-04  1:56   ` Lu Baolu
2022-01-04  1:56 ` [PATCH v5 07/14] PCI: " Lu Baolu
2022-01-04  1:56   ` Lu Baolu
2022-02-14 10:03   ` Greg Kroah-Hartman
2022-02-14 10:03     ` Greg Kroah-Hartman
2022-02-14 12:38     ` Jason Gunthorpe
2022-02-14 12:38       ` Jason Gunthorpe via iommu
2022-02-14 12:51       ` Greg Kroah-Hartman
2022-02-14 12:51         ` Greg Kroah-Hartman
2022-02-14 13:11         ` Jason Gunthorpe
2022-02-14 13:11           ` Jason Gunthorpe via iommu
2022-02-14 13:39           ` Greg Kroah-Hartman
2022-02-14 13:39             ` Greg Kroah-Hartman
2022-02-14 13:43             ` Jason Gunthorpe
2022-02-14 13:43               ` Jason Gunthorpe via iommu
2022-02-15  3:06               ` Lu Baolu
2022-02-15  3:06                 ` Lu Baolu
2022-02-23 18:00   ` Bjorn Helgaas
2022-02-23 18:00     ` Bjorn Helgaas
2022-02-23 18:07     ` Jason Gunthorpe [this message]
2022-02-23 18:07       ` Jason Gunthorpe via iommu
2022-01-04  1:56 ` [PATCH v5 08/14] PCI: pci_stub: Suppress kernel DMA ownership auto-claiming Lu Baolu
2022-01-04  1:56   ` Lu Baolu
2022-01-04  1:56 ` [PATCH v5 09/14] PCI: portdrv: " Lu Baolu
2022-01-04  1:56   ` Lu Baolu
2022-01-04 17:06   ` Bjorn Helgaas
2022-01-04 17:06     ` Bjorn Helgaas
2022-01-04 19:26     ` Jason Gunthorpe
2022-01-04 19:26       ` Jason Gunthorpe via iommu
2022-01-04 19:51       ` Bjorn Helgaas
2022-01-04 19:51         ` Bjorn Helgaas
2022-01-05  0:35         ` Jason Gunthorpe
2022-01-05  0:35           ` Jason Gunthorpe via iommu
2022-01-06  4:12     ` Lu Baolu
2022-01-06  4:12       ` Lu Baolu
2022-01-06 18:32       ` Bjorn Helgaas
2022-01-06 18:32         ` Bjorn Helgaas
2022-01-07  1:53         ` Lu Baolu
2022-01-07  1:53           ` Lu Baolu
2022-01-04  1:56 ` [PATCH v5 10/14] vfio: Set DMA ownership for VFIO devices Lu Baolu
2022-01-04  1:56   ` Lu Baolu
2022-01-04  1:56 ` [PATCH v5 11/14] vfio: Remove use of vfio_group_viable() Lu Baolu
2022-01-04  1:56   ` Lu Baolu
2022-01-04  1:56 ` [PATCH v5 12/14] vfio: Delete the unbound_list Lu Baolu
2022-01-04  1:56   ` Lu Baolu
2022-01-04  1:56 ` [PATCH v5 13/14] vfio: Remove iommu group notifier Lu Baolu
2022-01-04  1:56   ` Lu Baolu
2022-01-04  1:56 ` [PATCH v5 14/14] iommu: Remove iommu group changes notifier Lu Baolu
2022-01-04  1:56   ` Lu Baolu
2022-01-04 12:48 ` [PATCH v5 00/14] Fix BUG_ON in vfio_iommu_group_notifier() Jason Gunthorpe
2022-01-04 12:48   ` Jason Gunthorpe via iommu
2022-01-05  6:52   ` Lu Baolu
2022-01-05  6:52     ` Lu Baolu
2022-02-18  1:07 ` Lu Baolu
2022-02-18  1:07   ` Lu Baolu

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