Hi Magnus, On 20/10/16 00:36, Magnus Damm wrote: > From: Magnus Damm <damm+rene...@opensource.se> > > Not all architectures have an iommu member in their archdata, so > use #ifdefs support build wit COMPILE_TEST on any architecture.
As an alternative to this we could now use iommu_fwspec in place of the custom ipmmu_vmsa_archdata - that's deliberately architecture-independent. I converted the Mediatek drivers[1] as an example to stand separately from the big SMMU rework, as those are the ones I'm most familiar with, but it looks like the IPMMU is a similarly perfect fit. Of course, that could always come afterwards as a cleanup - I wouldn't consider it a blocker at this point - but it does look like it might simplify some of the code being moved around in this series if it were to be done beforehand. Robin. [1]:http://www.mail-archive.com/iommu@lists.linux-foundation.org/msg14577.html > > Signed-off-by: Magnus Damm <damm+rene...@opensource.se> > Reviewed-by: Joerg Roedel <jroe...@suse.de> > --- > > Changes since V5: > - None > > Changes since V4: > - None > > Changes since V3: > - New patch > > drivers/iommu/ipmmu-vmsa.c | 37 +++++++++++++++++++++++++++---------- > 1 file changed, 27 insertions(+), 10 deletions(-) > > --- 0012/drivers/iommu/ipmmu-vmsa.c > +++ work/drivers/iommu/ipmmu-vmsa.c 2016-09-20 21:59:21.690607110 +0900 > @@ -70,6 +70,25 @@ static struct ipmmu_vmsa_domain *to_vmsa > return container_of(dom, struct ipmmu_vmsa_domain, io_domain); > } > > +#if defined(CONFIG_ARM) || defined(CONFIG_ARM64) > +static struct ipmmu_vmsa_archdata *to_archdata(struct device *dev) > +{ > + return dev->archdata.iommu; > +} > +static void set_archdata(struct device *dev, struct ipmmu_vmsa_archdata *p) > +{ > + dev->archdata.iommu = p; > +} > +#else > +static struct ipmmu_vmsa_archdata *to_archdata(struct device *dev) > +{ > + return NULL; > +} > +static void set_archdata(struct device *dev, struct ipmmu_vmsa_archdata *p) > +{ > +} > +#endif > + > #define TLB_LOOP_TIMEOUT 100 /* 100us */ > > /* > ----------------------------------------------------------------------------- > @@ -539,7 +558,7 @@ static void ipmmu_domain_free(struct iom > static int ipmmu_attach_device(struct iommu_domain *io_domain, > struct device *dev) > { > - struct ipmmu_vmsa_archdata *archdata = dev->archdata.iommu; > + struct ipmmu_vmsa_archdata *archdata = to_archdata(dev); > struct ipmmu_vmsa_device *mmu = archdata->mmu; > struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain); > unsigned long flags; > @@ -581,7 +600,7 @@ static int ipmmu_attach_device(struct io > static void ipmmu_detach_device(struct iommu_domain *io_domain, > struct device *dev) > { > - struct ipmmu_vmsa_archdata *archdata = dev->archdata.iommu; > + struct ipmmu_vmsa_archdata *archdata = to_archdata(dev); > struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain); > unsigned int i; > > @@ -701,7 +720,7 @@ static int ipmmu_init_platform_device(st > archdata->mmu = mmu; > archdata->utlbs = utlbs; > archdata->num_utlbs = num_utlbs; > - dev->archdata.iommu = archdata; > + set_archdata(dev, archdata); > return 0; > > error: > @@ -713,12 +732,11 @@ error: > > static int ipmmu_add_device(struct device *dev) > { > - struct ipmmu_vmsa_archdata *archdata; > struct ipmmu_vmsa_device *mmu = NULL; > struct iommu_group *group; > int ret; > > - if (dev->archdata.iommu) { > + if (to_archdata(dev)) { > dev_warn(dev, "IOMMU driver already assigned to device %s\n", > dev_name(dev)); > return -EINVAL; > @@ -754,8 +772,7 @@ static int ipmmu_add_device(struct devic > * - Make the mapping size configurable ? We currently use a 2GB mapping > * at a 1GB offset to ensure that NULL VAs will fault. > */ > - archdata = dev->archdata.iommu; > - mmu = archdata->mmu; > + mmu = to_archdata(dev)->mmu; > if (!mmu->mapping) { > struct dma_iommu_mapping *mapping; > > @@ -783,7 +800,7 @@ error: > if (mmu) > arm_iommu_release_mapping(mmu->mapping); > > - dev->archdata.iommu = NULL; > + set_archdata(dev, NULL); > > if (!IS_ERR_OR_NULL(group)) > iommu_group_remove_device(dev); > @@ -793,7 +810,7 @@ error: > > static void ipmmu_remove_device(struct device *dev) > { > - struct ipmmu_vmsa_archdata *archdata = dev->archdata.iommu; > + struct ipmmu_vmsa_archdata *archdata = to_archdata(dev); > > arm_iommu_detach_device(dev); > iommu_group_remove_device(dev); > @@ -801,7 +818,7 @@ static void ipmmu_remove_device(struct d > kfree(archdata->utlbs); > kfree(archdata); > > - dev->archdata.iommu = NULL; > + set_archdata(dev, NULL); > } > > static struct iommu_domain *ipmmu_domain_alloc(unsigned type) >
