From: Lu Baolu <baolu.lu@linux.intel.com>
To: Jason Gunthorpe <jgg@nvidia.com>, Christoph Hellwig <hch@infradead.org>
Cc: 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>,
Kevin Tian <kevin.tian@intel.com>,
Ashok Raj <ashok.raj@intel.com>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Dan Williams <dan.j.williams@intel.com>,
rafael@kernel.org, Diana Craciun <diana.craciun@oss.nxp.com>,
Cornelia Huck <cohuck@redhat.com>,
Eric Auger <eric.auger@redhat.com>, Liu Yi L <yi.l.liu@intel.com>,
Jacob jun Pan <jacob.jun.pan@intel.com>,
Chaitanya Kulkarni <kch@nvidia.com>,
Stuart Yoder <stuyoder@gmail.com>,
Laurentiu Tudor <laurentiu.tudor@nxp.com>,
Thierry Reding <thierry.reding@gmail.com>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Jonathan Hunter <jonathanh@nvidia.com>,
Li Yang <leoyang.li@nxp.com>, Dmitry Osipenko <digetx@gmail.com>,
iommu@lists.linux-foundation.org, linux-pci@vger.kernel.org,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 04/18] driver core: platform: Add driver dma ownership management
Date: Tue, 7 Dec 2021 10:57:25 +0800 [thread overview]
Message-ID: <56a63776-48ca-0d6e-c25c-016dc016e0d5@linux.intel.com> (raw)
In-Reply-To: <20211206150647.GE4670@nvidia.com>
On 12/6/21 11:06 PM, Jason Gunthorpe wrote:
> On Mon, Dec 06, 2021 at 06:36:27AM -0800, Christoph Hellwig wrote:
>> I really hate the amount of boilerplate code that having this in each
>> bus type causes.
> +1
>
> I liked the first version of this series better with the code near
> really_probe().
>
> Can we go back to that with some device_configure_dma() wrapper
> condtionally called by really_probe as we discussed?
>
Are you talking about below change?
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 68ea1f949daa..368f9e530515 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -577,7 +577,13 @@ static int really_probe(struct device *dev, struct
device_driver *drv)
if (dev->bus->dma_configure) {
ret = dev->bus->dma_configure(dev);
if (ret)
- goto probe_failed;
+ goto pinctrl_bind_failed;
+
+ if (!drv->no_kernel_dma) {
+ ret = iommu_device_set_dma_owner(dev, DMA_OWNER_DMA_API, NULL);
+ if (ret)
+ goto pinctrl_bind_failed;
+ }
}
ret = driver_sysfs_add(dev);
@@ -660,6 +666,9 @@ static int really_probe(struct device *dev, struct
device_driver *drv)
if (dev->bus)
blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_DRIVER_NOT_BOUND, dev);
+
+ if (dev->bus->dma_configure && !drv->no_kernel_dma)
+ iommu_device_release_dma_owner(dev, DMA_OWNER_DMA_API);
pinctrl_bind_failed:
device_links_no_driver(dev);
devres_release_all(dev);
@@ -1204,6 +1213,9 @@ static void __device_release_driver(struct device
*dev, struct device *parent)
else if (drv->remove)
drv->remove(dev);
+ if (dev->bus->dma_configure && !drv->no_kernel_dma)
+ iommu_device_release_dma_owner(dev, DMA_OWNER_DMA_API);
+
device_links_driver_cleanup(dev);
devres_release_all(dev);
diff --git a/include/linux/device/driver.h b/include/linux/device/driver.h
index a498ebcf4993..2cf7b757b28e 100644
--- a/include/linux/device/driver.h
+++ b/include/linux/device/driver.h
@@ -100,6 +100,7 @@ struct device_driver {
const char *mod_name; /* used for built-in modules */
bool suppress_bind_attrs; /* disables bind/unbind via sysfs */
+ bool no_kernel_dma;
enum probe_type probe_type;
const struct of_device_id *of_match_table;
Best regards,
baolu
next prev parent reply other threads:[~2021-12-07 2:57 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-06 1:58 [PATCH v3 00/18] Fix BUG_ON in vfio_iommu_group_notifier() Lu Baolu
2021-12-06 1:58 ` [PATCH v3 01/18] iommu: Add device dma ownership set/release interfaces Lu Baolu
2021-12-06 13:35 ` Joerg Roedel
2021-12-06 14:29 ` Christoph Hellwig
2021-12-06 15:01 ` Jason Gunthorpe
2021-12-07 1:52 ` Lu Baolu
2021-12-06 14:42 ` Christoph Hellwig
2021-12-07 2:07 ` Lu Baolu
2021-12-06 1:58 ` [PATCH v3 02/18] driver core: Add dma_cleanup callback in bus_type Lu Baolu
2021-12-06 1:58 ` [PATCH v3 03/18] driver core: platform: Rename platform_dma_configure() Lu Baolu
2021-12-06 7:53 ` Greg Kroah-Hartman
2021-12-06 14:13 ` Christoph Hellwig
2021-12-06 14:43 ` Greg Kroah-Hartman
2021-12-06 14:45 ` Jason Gunthorpe
2021-12-06 14:47 ` Christoph Hellwig
2021-12-06 15:04 ` Jason Gunthorpe
2021-12-07 1:21 ` Lu Baolu
2021-12-07 23:09 ` Dan Williams
2021-12-06 1:58 ` [PATCH v3 04/18] driver core: platform: Add driver dma ownership management Lu Baolu
2021-12-06 7:54 ` Greg Kroah-Hartman
2021-12-06 14:36 ` Christoph Hellwig
2021-12-06 15:06 ` Jason Gunthorpe
2021-12-07 2:57 ` Lu Baolu [this message]
2021-12-07 13:16 ` Jason Gunthorpe
2021-12-07 13:25 ` Christoph Hellwig
2021-12-07 13:30 ` Jason Gunthorpe
2021-12-09 1:20 ` Lu Baolu
2021-12-10 1:23 ` Lu Baolu
2021-12-13 0:50 ` Lu Baolu
2021-12-13 13:24 ` Jason Gunthorpe
2021-12-15 12:24 ` Lu Baolu
2021-12-14 16:35 ` Christoph Hellwig
2021-12-06 1:58 ` [PATCH v3 05/18] amba: " Lu Baolu
2021-12-06 1:58 ` [PATCH v3 06/18] bus: fsl-mc: " Lu Baolu
2021-12-06 1:58 ` [PATCH v3 07/18] PCI: " Lu Baolu
2021-12-06 1:58 ` [PATCH v3 08/18] PCI: pci_stub: Suppress kernel DMA ownership auto-claiming Lu Baolu
2021-12-06 1:58 ` [PATCH v3 09/18] PCI: portdrv: " Lu Baolu
2021-12-06 1:58 ` [PATCH v3 10/18] iommu: Add security context management for assigned devices Lu Baolu
2021-12-06 1:58 ` [PATCH v3 11/18] iommu: Expose group variants of dma ownership interfaces Lu Baolu
2021-12-06 1:58 ` [PATCH v3 12/18] iommu: Add iommu_at[de]tach_device_shared() for multi-device groups Lu Baolu
2021-12-06 14:43 ` Christoph Hellwig
2021-12-07 2:33 ` Lu Baolu
2021-12-06 1:58 ` [PATCH v3 13/18] vfio: Set DMA USER ownership for VFIO devices Lu Baolu
2021-12-06 1:58 ` [PATCH v3 14/18] vfio: Remove use of vfio_group_viable() Lu Baolu
2021-12-06 1:59 ` [PATCH v3 15/18] vfio: Delete the unbound_list Lu Baolu
2021-12-06 1:59 ` [PATCH v3 16/18] vfio: Remove iommu group notifier Lu Baolu
2021-12-06 1:59 ` [PATCH v3 17/18] iommu: Remove iommu group changes notifier Lu Baolu
2021-12-06 1:59 ` [PATCH v3 18/18] drm/tegra: Use the iommu dma_owner mechanism Lu Baolu
2021-12-06 12:40 ` Jason Gunthorpe
2021-12-07 2:34 ` Lu Baolu
2021-12-17 6:41 ` [PATCH v3 00/18] Fix BUG_ON in vfio_iommu_group_notifier() Lu Baolu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=56a63776-48ca-0d6e-c25c-016dc016e0d5@linux.intel.com \
--to=baolu.lu@linux.intel.com \
--cc=airlied@linux.ie \
--cc=alex.williamson@redhat.com \
--cc=ashok.raj@intel.com \
--cc=bhelgaas@google.com \
--cc=cohuck@redhat.com \
--cc=dan.j.williams@intel.com \
--cc=daniel@ffwll.ch \
--cc=diana.craciun@oss.nxp.com \
--cc=digetx@gmail.com \
--cc=eric.auger@redhat.com \
--cc=gregkh@linuxfoundation.org \
--cc=hch@infradead.org \
--cc=iommu@lists.linux-foundation.org \
--cc=jacob.jun.pan@intel.com \
--cc=jgg@nvidia.com \
--cc=jonathanh@nvidia.com \
--cc=joro@8bytes.org \
--cc=kch@nvidia.com \
--cc=kevin.tian@intel.com \
--cc=kvm@vger.kernel.org \
--cc=laurentiu.tudor@nxp.com \
--cc=leoyang.li@nxp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=rafael@kernel.org \
--cc=robin.murphy@arm.com \
--cc=stuyoder@gmail.com \
--cc=thierry.reding@gmail.com \
--cc=will@kernel.org \
--cc=yi.l.liu@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).