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| author | Alistair Popple <alistair@popple.id.au> | 2017-04-03 11:51:44 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-04-04 05:27:26 +0200 |
| commit | 1ab66d1fbadad86b1f4a9c7857e193af0ee0022c (patch) | |
| tree | 0416486fa6ef85c67e1f679b5df5a110ef68b734 /arch/powerpc/include/asm/opal-api.h | |
| parent | powerpc/powernv: Add sanity checks to pnv_pci_get_{gpu|npu}_dev (diff) | |
| download | linux-1ab66d1fbadad86b1f4a9c7857e193af0ee0022c.tar.xz linux-1ab66d1fbadad86b1f4a9c7857e193af0ee0022c.zip | |
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-api.h')
| -rw-r--r-- | arch/powerpc/include/asm/opal-api.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h index a0aa285869b5..a599a2c893c3 100644 --- a/arch/powerpc/include/asm/opal-api.h +++ b/arch/powerpc/include/asm/opal-api.h @@ -168,7 +168,10 @@ #define OPAL_INT_SET_MFRR 125 #define OPAL_PCI_TCE_KILL 126 #define OPAL_NMMU_SET_PTCR 127 -#define OPAL_LAST 127 +#define OPAL_NPU_INIT_CONTEXT 146 +#define OPAL_NPU_DESTROY_CONTEXT 147 +#define OPAL_NPU_MAP_LPAR 148 +#define OPAL_LAST 148 /* Device tree flags */ |