| Message ID | 20221014044049.2557085-4-nipun.gupta@amd.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | add support for CDX bus | expand |
[AMD Official Use Only - General] This patch will be rebased on top of https://lore.kernel.org/linux-iommu/cover.1660572783.git.robin.murphy@arm.com/T/#t in next respin. Regards, Nipun > -----Original Message----- > From: Nipun Gupta <nipun.gupta@amd.com> > Sent: Friday, October 14, 2022 10:11 AM > To: robh+dt@kernel.org; krzysztof.kozlowski+dt@linaro.org; > gregkh@linuxfoundation.org; rafael@kernel.org; eric.auger@redhat.com; > alex.williamson@redhat.com; cohuck@redhat.com; Gupta, Puneet (DCG-ENG) > <puneet.gupta@amd.com>; song.bao.hua@hisilicon.com; > mchehab+huawei@kernel.org; maz@kernel.org; f.fainelli@gmail.com; > jeffrey.l.hugo@gmail.com; saravanak@google.com; Michael.Srba@seznam.cz; > mani@kernel.org; yishaih@nvidia.com; jgg@ziepe.ca; jgg@nvidia.com; > robin.murphy@arm.com; will@kernel.org; joro@8bytes.org; > masahiroy@kernel.org; ndesaulniers@google.com; linux-arm- > kernel@lists.infradead.org; linux-kbuild@vger.kernel.org; linux- > kernel@vger.kernel.org; devicetree@vger.kernel.org; kvm@vger.kernel.org > Cc: okaya@kernel.org; Anand, Harpreet <harpreet.anand@amd.com>; Agarwal, > Nikhil <nikhil.agarwal@amd.com>; Simek, Michal <michal.simek@amd.com>; > Radovanovic, Aleksandar <aleksandar.radovanovic@amd.com>; git (AMD-Xilinx) > <git@amd.com>; Gupta, Nipun <Nipun.Gupta@amd.com> > Subject: [RFC PATCH v4 3/8] iommu/arm-smmu-v3: support ops registration for > CDX bus > > With new CDX bus supported for AMD FPGA devices on ARM > platform, the bus requires registration for the SMMU v3 > driver. > > Signed-off-by: Nipun Gupta <nipun.gupta@amd.com> > --- > drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 16 ++++++++++++++-- > 1 file changed, 14 insertions(+), 2 deletions(-) > > diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c > b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c > index d32b02336411..8ec9f2baf12d 100644 > --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c > +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c > @@ -29,6 +29,7 @@ > #include <linux/platform_device.h> > > #include <linux/amba/bus.h> > +#include <linux/cdx/cdx_bus.h> > > #include "arm-smmu-v3.h" > #include "../../iommu-sva-lib.h" > @@ -3690,16 +3691,27 @@ static int arm_smmu_set_bus_ops(struct > iommu_ops *ops) > if (err) > goto err_reset_pci_ops; > } > +#endif > +#ifdef CONFIG_CDX_BUS > + if (cdx_bus_type.iommu_ops != ops) { > + err = bus_set_iommu(&cdx_bus_type, ops); > + if (err) > + goto err_reset_amba_ops; > + } > #endif > if (platform_bus_type.iommu_ops != ops) { > err = bus_set_iommu(&platform_bus_type, ops); > if (err) > - goto err_reset_amba_ops; > + goto err_reset_cdx_ops; > } > > return 0; > > -err_reset_amba_ops: > +err_reset_cdx_ops: > +#ifdef CONFIG_CDX_BUS > + bus_set_iommu(&cdx_bus_type, NULL); > +#endif > +err_reset_amba_ops: __maybe_unused; > #ifdef CONFIG_ARM_AMBA > bus_set_iommu(&amba_bustype, NULL); > #endif > -- > 2.25.1
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index d32b02336411..8ec9f2baf12d 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -29,6 +29,7 @@ #include <linux/platform_device.h> #include <linux/amba/bus.h> +#include <linux/cdx/cdx_bus.h> #include "arm-smmu-v3.h" #include "../../iommu-sva-lib.h" @@ -3690,16 +3691,27 @@ static int arm_smmu_set_bus_ops(struct iommu_ops *ops) if (err) goto err_reset_pci_ops; } +#endif +#ifdef CONFIG_CDX_BUS + if (cdx_bus_type.iommu_ops != ops) { + err = bus_set_iommu(&cdx_bus_type, ops); + if (err) + goto err_reset_amba_ops; + } #endif if (platform_bus_type.iommu_ops != ops) { err = bus_set_iommu(&platform_bus_type, ops); if (err) - goto err_reset_amba_ops; + goto err_reset_cdx_ops; } return 0; -err_reset_amba_ops: +err_reset_cdx_ops: +#ifdef CONFIG_CDX_BUS + bus_set_iommu(&cdx_bus_type, NULL); +#endif +err_reset_amba_ops: __maybe_unused; #ifdef CONFIG_ARM_AMBA bus_set_iommu(&amba_bustype, NULL); #endif
With new CDX bus supported for AMD FPGA devices on ARM platform, the bus requires registration for the SMMU v3 driver. Signed-off-by: Nipun Gupta <nipun.gupta@amd.com> --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-)