| Message ID | 20200310091229.29830-7-joro@8bytes.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | iommu: Move iommu_fwspec out of 'struct device' | expand |
On Tue, Mar 10, 2020 at 10:12:20AM +0100, Joerg Roedel wrote: > From: Joerg Roedel <jroedel@suse.de> > > Move the iommu_fwspec pointer in struct device into struct dev_iommu. > This is a step in the effort to reduce the iommu related pointers in > struct device to one. > > Tested-by: Will Deacon <will@kernel.org> # arm-smmu > Signed-off-by: Joerg Roedel <jroedel@suse.de> > --- > drivers/iommu/iommu.c | 3 +++ > include/linux/device.h | 1 - > include/linux/iommu.h | 12 ++++++++---- > 3 files changed, 11 insertions(+), 5 deletions(-) > > diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c > index beac2ef063dd..826a67ba247f 100644 > --- a/drivers/iommu/iommu.c > +++ b/drivers/iommu/iommu.c > @@ -2405,6 +2405,9 @@ int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode, > if (fwspec) > return ops == fwspec->ops ? 0 : -EINVAL; > > + if (!dev_iommu_get(dev)) > + return -ENOMEM; > + > fwspec = kzalloc(sizeof(*fwspec), GFP_KERNEL); > if (!fwspec) > return -ENOMEM; > diff --git a/include/linux/device.h b/include/linux/device.h > index 405a8f11bec1..ca29c39a6480 100644 > --- a/include/linux/device.h > +++ b/include/linux/device.h > @@ -613,7 +613,6 @@ struct device { > > void (*release)(struct device *dev); > struct iommu_group *iommu_group; > - struct iommu_fwspec *iommu_fwspec; > struct dev_iommu *iommu; > > bool offline_disabled:1; > diff --git a/include/linux/iommu.h b/include/linux/iommu.h > index 1c9fa5c1174b..f5edc21a644d 100644 > --- a/include/linux/iommu.h > +++ b/include/linux/iommu.h > @@ -368,14 +368,15 @@ struct iommu_fault_param { > * struct dev_iommu - Collection of per-device IOMMU data > * > * @fault_param: IOMMU detected device fault reporting data > + * @fwspec: IOMMU fwspec data > * > * TODO: migrate other per device data pointers under iommu_dev_data, e.g. > * struct iommu_group *iommu_group; > - * struct iommu_fwspec *iommu_fwspec; > */ > struct dev_iommu { > struct mutex lock; > - struct iommu_fault_param *fault_param; > + struct iommu_fault_param *fault_param; > + struct iommu_fwspec *fwspec; > }; > > int iommu_device_register(struct iommu_device *iommu); > @@ -614,13 +615,16 @@ const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode); > > static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev) > { > - return dev->iommu_fwspec; > + if (dev->iommu) > + return dev->iommu->fwspec; > + else > + return NULL; > } > > static inline void dev_iommu_fwspec_set(struct device *dev, > struct iommu_fwspec *fwspec) > { > - dev->iommu_fwspec = fwspec; > + dev->iommu->fwspec = fwspec; It may be worth moving the set() to iommu.c and prevent any misuse. Regardless: Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org> > } > > int iommu_probe_device(struct device *dev); > -- > 2.17.1 >
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index beac2ef063dd..826a67ba247f 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -2405,6 +2405,9 @@ int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode, if (fwspec) return ops == fwspec->ops ? 0 : -EINVAL; + if (!dev_iommu_get(dev)) + return -ENOMEM; + fwspec = kzalloc(sizeof(*fwspec), GFP_KERNEL); if (!fwspec) return -ENOMEM; diff --git a/include/linux/device.h b/include/linux/device.h index 405a8f11bec1..ca29c39a6480 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -613,7 +613,6 @@ struct device { void (*release)(struct device *dev); struct iommu_group *iommu_group; - struct iommu_fwspec *iommu_fwspec; struct dev_iommu *iommu; bool offline_disabled:1; diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 1c9fa5c1174b..f5edc21a644d 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -368,14 +368,15 @@ struct iommu_fault_param { * struct dev_iommu - Collection of per-device IOMMU data * * @fault_param: IOMMU detected device fault reporting data + * @fwspec: IOMMU fwspec data * * TODO: migrate other per device data pointers under iommu_dev_data, e.g. * struct iommu_group *iommu_group; - * struct iommu_fwspec *iommu_fwspec; */ struct dev_iommu { struct mutex lock; - struct iommu_fault_param *fault_param; + struct iommu_fault_param *fault_param; + struct iommu_fwspec *fwspec; }; int iommu_device_register(struct iommu_device *iommu); @@ -614,13 +615,16 @@ const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode); static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev) { - return dev->iommu_fwspec; + if (dev->iommu) + return dev->iommu->fwspec; + else + return NULL; } static inline void dev_iommu_fwspec_set(struct device *dev, struct iommu_fwspec *fwspec) { - dev->iommu_fwspec = fwspec; + dev->iommu->fwspec = fwspec; } int iommu_probe_device(struct device *dev);