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| author | Christophe Lombard <clombard@linux.vnet.ibm.com> | 2017-04-12 16:34:07 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-04-13 23:34:31 +1000 |
| commit | f24be42aab37c6d07c05126673138e06223a6399 (patch) | |
| tree | 778de3d0c4b2dd8d80be7edb262174d1755ee8d9 /Documentation/powerpc | |
| parent | abd1d99bb3da42d6c7341c14986f5b8f4dcc6bd5 (diff) | |
| download | lwn-f24be42aab37c6d07c05126673138e06223a6399.tar.gz lwn-f24be42aab37c6d07c05126673138e06223a6399.zip | |
cxl: Add psl9 specific code
The new Coherent Accelerator Interface Architecture, level 2, for the
IBM POWER9 brings new content and features:
- POWER9 Service Layer
- Registers
- Radix mode
- Process element entry
- Dedicated-Shared Process Programming Model
- Translation Fault Handling
- CAPP
- Memory Context ID
If a valid mm_struct is found the memory context id is used for each
transaction associated with the process handle. The PSL uses the
context ID to find the corresponding process element.
Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Acked-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
[mpe: Fixup comment formatting, unsplit long strings]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'Documentation/powerpc')
| -rw-r--r-- | Documentation/powerpc/cxl.txt | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/Documentation/powerpc/cxl.txt b/Documentation/powerpc/cxl.txt index d5506ba0fef7..c5e8d5098ed3 100644 --- a/Documentation/powerpc/cxl.txt +++ b/Documentation/powerpc/cxl.txt @@ -21,7 +21,7 @@ Introduction Hardware overview ================= - POWER8 FPGA + POWER8/9 FPGA +----------+ +---------+ | | | | | CPU | | AFU | @@ -34,7 +34,7 @@ Hardware overview | | CAPP |<------>| | +---+------+ PCIE +---------+ - The POWER8 chip has a Coherently Attached Processor Proxy (CAPP) + The POWER8/9 chip has a Coherently Attached Processor Proxy (CAPP) unit which is part of the PCIe Host Bridge (PHB). This is managed by Linux by calls into OPAL. Linux doesn't directly program the CAPP. @@ -59,6 +59,17 @@ Hardware overview the fault. The context to which this fault is serviced is based on who owns that acceleration function. + POWER8 <-----> PSL Version 8 is compliant to the CAIA Version 1.0. + POWER9 <-----> PSL Version 9 is compliant to the CAIA Version 2.0. + This PSL Version 9 provides new features such as: + * Interaction with the nest MMU on the P9 chip. + * Native DMA support. + * Supports sending ASB_Notify messages for host thread wakeup. + * Supports Atomic operations. + * .... + + Cards with a PSL9 won't work on a POWER8 system and cards with a + PSL8 won't work on a POWER9 system. AFU Modes ========= |