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author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2015-06-05 16:35:06 +1000 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2015-06-11 15:14:56 +1000 |
commit | da004c3600f52e4f05017f60970e5010978006bc (patch) | |
tree | 2f8573ad65adccea54af87be3ecd5bb5f0fa2007 /arch/powerpc/include/asm/iommu.h | |
parent | 10b35b2b7485c342334a48cf199063eed8b8748e (diff) | |
download | linux-da004c3600f52e4f05017f60970e5010978006bc.tar.gz |
powerpc/iommu: Move tce_xxx callbacks from ppc_md to iommu_table
This adds a iommu_table_ops struct and puts pointer to it into the iommu_table struct. This moves tce_build/tce_free/tce_get/tce_flush callbacks from ppc_md to the new struct where they really belong to. This adds the requirement for @it_ops to be initialized before calling iommu_init_table() to make sure that we do not leave any IOMMU table with iommu_table_ops uninitialized. This is not a parameter of iommu_init_table() though as there will be cases when iommu_init_table() will not be called on TCE tables, for example - VFIO. This does s/tce_build/set/, s/tce_free/clear/ and removes "tce_" redundant prefixes. This removes tce_xxx_rm handlers from ppc_md but does not add them to iommu_table_ops as this will be done later if we decide to support TCE hypercalls in real mode. This removes _vm callbacks as only virtual mode is supported by now so this also removes @rm parameter. For pSeries, this always uses tce_buildmulti_pSeriesLP/ tce_buildmulti_pSeriesLP. This changes multi callback to fall back to tce_build_pSeriesLP/tce_free_pSeriesLP if FW_FEATURE_MULTITCE is not present. The reason for this is we still have to support "multitce=off" boot parameter in disable_multitce() and we do not want to walk through all IOMMU tables in the system and replace "multi" callbacks with single ones. For powernv, this defines _ops per PHB type which are P5IOC2/IODA1/IODA2. This makes the callbacks for them public. Later patches will extend callbacks for IODA1/2. No change in behaviour is expected. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/iommu.h')
-rw-r--r-- | arch/powerpc/include/asm/iommu.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h index d91bd69d3196..e2a45c37dba8 100644 --- a/arch/powerpc/include/asm/iommu.h +++ b/arch/powerpc/include/asm/iommu.h @@ -44,6 +44,22 @@ extern int iommu_is_off; extern int iommu_force_on; +struct iommu_table_ops { + int (*set)(struct iommu_table *tbl, + long index, long npages, + unsigned long uaddr, + enum dma_data_direction direction, + struct dma_attrs *attrs); + void (*clear)(struct iommu_table *tbl, + long index, long npages); + unsigned long (*get)(struct iommu_table *tbl, long index); + void (*flush)(struct iommu_table *tbl); +}; + +/* These are used by VIO */ +extern struct iommu_table_ops iommu_table_lpar_multi_ops; +extern struct iommu_table_ops iommu_table_pseries_ops; + /* * IOMAP_MAX_ORDER defines the largest contiguous block * of dma space we can get. IOMAP_MAX_ORDER = 13 @@ -78,6 +94,7 @@ struct iommu_table { #ifdef CONFIG_IOMMU_API struct iommu_group *it_group; #endif + struct iommu_table_ops *it_ops; void (*set_bypass)(struct iommu_table *tbl, bool enable); #ifdef CONFIG_PPC_POWERNV void *data; |