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author | 2015-06-24 08:46:32 -0700 | |
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committer | 2015-06-24 08:46:32 -0700 | |
commit | 08d183e3c1f650b4db1d07d764502116861542fa (patch) | |
tree | f868a813f36744597bc7a8260c63cd37a3a94338 /arch/powerpc/include/asm/iommu.h | |
parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux (diff) | |
parent | Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/scottwood/linux into next (diff) | |
download | linux-dev-08d183e3c1f650b4db1d07d764502116861542fa.tar.xz linux-dev-08d183e3c1f650b4db1d07d764502116861542fa.zip |
Merge tag 'powerpc-4.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux
Pull powerpc updates from Michael Ellerman:
- disable the 32-bit vdso when building LE, so we can build with a
64-bit only toolchain.
- EEH fixes from Gavin & Richard.
- enable the sys_kcmp syscall from Laurent.
- sysfs control for fastsleep workaround from Shreyas.
- expose OPAL events as an irq chip by Alistair.
- MSI ops moved to pci_controller_ops by Daniel.
- fix for kernel to userspace backtraces for perf from Anton.
- merge pseries and pseries_le defconfigs from Cyril.
- CXL in-kernel API from Mikey.
- OPAL prd driver from Jeremy.
- fix for DSCR handling & tests from Anshuman.
- Powernv flash mtd driver from Cyril.
- dynamic DMA Window support on powernv from Alexey.
- LLVM clang fixes & workarounds from Anton.
- reworked version of the patch to abort syscalls when transactional.
- fix the swap encoding to support 4TB, from Aneesh.
- various fixes as usual.
- Freescale updates from Scott: Highlights include more 8xx
optimizations, an e6500 hugetlb optimization, QMan device tree nodes,
t1024/t1023 support, and various fixes and cleanup.
* tag 'powerpc-4.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: (180 commits)
cxl: Fix typo in debug print
cxl: Add CXL_KERNEL_API config option
powerpc/powernv: Fix wrong IOMMU table in pnv_ioda_setup_bus_dma()
powerpc/mm: Change the swap encoding in pte.
powerpc/mm: PTE_RPN_MAX is not used, remove the same
powerpc/tm: Abort syscalls in active transactions
powerpc/iommu/ioda2: Enable compile with IOV=on and IOMMU_API=off
powerpc/include: Add opal-prd to installed uapi headers
powerpc/powernv: fix construction of opal PRD messages
powerpc/powernv: Increase opal-irqchip initcall priority
powerpc: Make doorbell check preemption safe
powerpc/powernv: pnv_init_idle_states() should only run on powernv
macintosh/nvram: Remove as unused
powerpc: Don't use gcc specific options on clang
powerpc: Don't use -mno-strict-align on clang
powerpc: Only use -mtraceback=no, -mno-string and -msoft-float if toolchain supports it
powerpc: Only use -mabi=altivec if toolchain supports it
powerpc: Fix duplicate const clang warning in user access code
vfio: powerpc/spapr: Support Dynamic DMA windows
vfio: powerpc/spapr: Register memory and define IOMMU v2
...
Diffstat (limited to 'arch/powerpc/include/asm/iommu.h')
-rw-r--r-- | arch/powerpc/include/asm/iommu.h | 119 |
1 files changed, 95 insertions, 24 deletions
diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h index 1e27d6338565..ca18cff90900 100644 --- a/arch/powerpc/include/asm/iommu.h +++ b/arch/powerpc/include/asm/iommu.h @@ -44,6 +44,39 @@ extern int iommu_is_off; extern int iommu_force_on; +struct iommu_table_ops { + /* + * When called with direction==DMA_NONE, it is equal to clear(). + * uaddr is a linear map address. + */ + int (*set)(struct iommu_table *tbl, + long index, long npages, + unsigned long uaddr, + enum dma_data_direction direction, + struct dma_attrs *attrs); +#ifdef CONFIG_IOMMU_API + /* + * Exchanges existing TCE with new TCE plus direction bits; + * returns old TCE and DMA direction mask. + * @tce is a physical address. + */ + int (*exchange)(struct iommu_table *tbl, + long index, + unsigned long *hpa, + enum dma_data_direction *direction); +#endif + void (*clear)(struct iommu_table *tbl, + long index, long npages); + /* get() returns a physical address */ + unsigned long (*get)(struct iommu_table *tbl, long index); + void (*flush)(struct iommu_table *tbl); + void (*free)(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 @@ -64,6 +97,9 @@ struct iommu_pool { struct iommu_table { unsigned long it_busno; /* Bus number this table belongs to */ unsigned long it_size; /* Size of iommu table in entries */ + unsigned long it_indirect_levels; + unsigned long it_level_size; + unsigned long it_allocated_size; unsigned long it_offset; /* Offset into global table */ unsigned long it_base; /* mapped address of tce table */ unsigned long it_index; /* which iommu table this is */ @@ -75,15 +111,16 @@ struct iommu_table { struct iommu_pool pools[IOMMU_NR_POOLS]; unsigned long *it_map; /* A simple allocation bitmap for now */ unsigned long it_page_shift;/* table iommu page size */ -#ifdef CONFIG_IOMMU_API - struct iommu_group *it_group; -#endif - void (*set_bypass)(struct iommu_table *tbl, bool enable); -#ifdef CONFIG_PPC_POWERNV - void *data; -#endif + struct list_head it_group_list;/* List of iommu_table_group_link */ + unsigned long *it_userspace; /* userspace view of the table */ + struct iommu_table_ops *it_ops; }; +#define IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry) \ + ((tbl)->it_userspace ? \ + &((tbl)->it_userspace[(entry) - (tbl)->it_offset]) : \ + NULL) + /* Pure 2^n version of get_order */ static inline __attribute_const__ int get_iommu_order(unsigned long size, struct iommu_table *tbl) @@ -112,14 +149,62 @@ extern void iommu_free_table(struct iommu_table *tbl, const char *node_name); */ extern struct iommu_table *iommu_init_table(struct iommu_table * tbl, int nid); +#define IOMMU_TABLE_GROUP_MAX_TABLES 2 + +struct iommu_table_group; + +struct iommu_table_group_ops { + unsigned long (*get_table_size)( + __u32 page_shift, + __u64 window_size, + __u32 levels); + long (*create_table)(struct iommu_table_group *table_group, + int num, + __u32 page_shift, + __u64 window_size, + __u32 levels, + struct iommu_table **ptbl); + long (*set_window)(struct iommu_table_group *table_group, + int num, + struct iommu_table *tblnew); + long (*unset_window)(struct iommu_table_group *table_group, + int num); + /* Switch ownership from platform code to external user (e.g. VFIO) */ + void (*take_ownership)(struct iommu_table_group *table_group); + /* Switch ownership from external user (e.g. VFIO) back to core */ + void (*release_ownership)(struct iommu_table_group *table_group); +}; + +struct iommu_table_group_link { + struct list_head next; + struct rcu_head rcu; + struct iommu_table_group *table_group; +}; + +struct iommu_table_group { + /* IOMMU properties */ + __u32 tce32_start; + __u32 tce32_size; + __u64 pgsizes; /* Bitmap of supported page sizes */ + __u32 max_dynamic_windows_supported; + __u32 max_levels; + + struct iommu_group *group; + struct iommu_table *tables[IOMMU_TABLE_GROUP_MAX_TABLES]; + struct iommu_table_group_ops *ops; +}; + #ifdef CONFIG_IOMMU_API -extern void iommu_register_group(struct iommu_table *tbl, + +extern void iommu_register_group(struct iommu_table_group *table_group, int pci_domain_number, unsigned long pe_num); extern int iommu_add_device(struct device *dev); extern void iommu_del_device(struct device *dev); extern int __init tce_iommu_bus_notifier_init(void); +extern long iommu_tce_xchg(struct iommu_table *tbl, unsigned long entry, + unsigned long *hpa, enum dma_data_direction *direction); #else -static inline void iommu_register_group(struct iommu_table *tbl, +static inline void iommu_register_group(struct iommu_table_group *table_group, int pci_domain_number, unsigned long pe_num) { @@ -140,13 +225,6 @@ static inline int __init tce_iommu_bus_notifier_init(void) } #endif /* !CONFIG_IOMMU_API */ -static inline void set_iommu_table_base_and_group(struct device *dev, - void *base) -{ - set_iommu_table_base(dev, base); - iommu_add_device(dev); -} - extern int ppc_iommu_map_sg(struct device *dev, struct iommu_table *tbl, struct scatterlist *sglist, int nelems, unsigned long mask, @@ -197,20 +275,13 @@ extern int iommu_tce_clear_param_check(struct iommu_table *tbl, unsigned long npages); extern int iommu_tce_put_param_check(struct iommu_table *tbl, unsigned long ioba, unsigned long tce); -extern int iommu_tce_build(struct iommu_table *tbl, unsigned long entry, - unsigned long hwaddr, enum dma_data_direction direction); -extern unsigned long iommu_clear_tce(struct iommu_table *tbl, - unsigned long entry); -extern int iommu_clear_tces_and_put_pages(struct iommu_table *tbl, - unsigned long entry, unsigned long pages); -extern int iommu_put_tce_user_mode(struct iommu_table *tbl, - unsigned long entry, unsigned long tce); extern void iommu_flush_tce(struct iommu_table *tbl); extern int iommu_take_ownership(struct iommu_table *tbl); extern void iommu_release_ownership(struct iommu_table *tbl); extern enum dma_data_direction iommu_tce_direction(unsigned long tce); +extern unsigned long iommu_direction_to_tce_perm(enum dma_data_direction dir); #endif /* __KERNEL__ */ #endif /* _ASM_IOMMU_H */ |