diff options
| author | Alistair Popple <alistair@popple.id.au> | 2017-04-03 19:51:44 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-04-04 13:27:26 +1000 |
| commit | 1ab66d1fbadad86b1f4a9c7857e193af0ee0022c (patch) | |
| tree | 0416486fa6ef85c67e1f679b5df5a110ef68b734 /arch/powerpc/include/asm/opal.h | |
| parent | 4c3b89effc281704d5395282c800c45e453235f6 (diff) | |
powerpc/powernv: Introduce address translation services for Nvlink2
Nvlink2 supports address translation services (ATS) allowing devices
to request address translations from an mmu known as the nest MMU
which is setup to walk the CPU page tables.
To access this functionality certain firmware calls are required to
setup and manage hardware context tables in the nvlink processing unit
(NPU). The NPU also manages forwarding of TLB invalidates (known as
address translation shootdowns/ATSDs) to attached devices.
This patch exports several methods to allow device drivers to register
a process id (PASID/PID) in the hardware tables and to receive
notification of when a device should stop issuing address translation
requests (ATRs). It also adds a fault handler to allow device drivers
to demand fault pages in.
Signed-off-by: Alistair Popple <alistair@popple.id.au>
[mpe: Fix up comment formatting, use flush_tlb_mm()]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/opal.h')
| -rw-r--r-- | arch/powerpc/include/asm/opal.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h index 1ff03a6da76e..b3b97c4cd54b 100644 --- a/arch/powerpc/include/asm/opal.h +++ b/arch/powerpc/include/asm/opal.h @@ -29,6 +29,11 @@ extern struct device_node *opal_node; /* API functions */ int64_t opal_invalid_call(void); +int64_t opal_npu_destroy_context(uint64_t phb_id, uint64_t pid, uint64_t bdf); +int64_t opal_npu_init_context(uint64_t phb_id, int pasid, uint64_t msr, + uint64_t bdf); +int64_t opal_npu_map_lpar(uint64_t phb_id, uint64_t bdf, uint64_t lparid, + uint64_t lpcr); int64_t opal_console_write(int64_t term_number, __be64 *length, const uint8_t *buffer); int64_t opal_console_read(int64_t term_number, __be64 *length, |