Sorry for reposting. Missed to specify dependency - VAS kernel changes. [PATCH 0/5] Enable NX 842 compression engine on Power9
P9 introduces Virtual Accelerator Switchboard (VAS) to communicate with NX 842 engine. icswx function is used to access NX before. On powerNV systems, NX-842 driver invokes VAS functions for configuring RxFIFO (receive window) per each NX engine. VAS uses this FIFO to communicate the request to NX. The kernel opens send window which is used to transfer compression/decompression requests to VAS. It maps the send window to the corresponding RxFIFO. copy/paste instructions are used to pass the CRB to VAS. This patch series adds P9 NX support for 842 compression engine. First 3 patches reorganize the current code so that VAS function can be added. - nx842_powernv_function points to VAS function if VAS feature is available. Otherwise icswx function is used. - Move configure CRB code nx842_cfg_crb() - In addition to freeing co-processor structs for initialization failures and exit, both send and receive windows have to closed for VAS. The last 2 patches adds configuring and invoking VAS, and also checking P9 NX specific errors that are provided in co-processor status block (CSB) for failures. Patches have been tested in P9 Simics environment using VAS changes. This patchset depends on VAS kernel changes: https://lists.ozlabs.org/pipermail/linuxppc-dev/2017-March/156078.html Thanks to Sukadev Bhattiprolu for his review, input and testing with VAS changes. Haren Myneni (5): crypto/nx: Rename nx842_powernv_function as icswx function crypto/nx: Create nx842_cfg_crb function crypto/nx: Create nx842_delete_coproc function crypto/nx: Add P9 NX support for 842 compression engine. crypto/nx: Add P9 NX specific error codes for 842 engine arch/powerpc/include/asm/icswx.h | 3 + arch/powerpc/include/asm/vas.h | 2 + drivers/crypto/nx/Kconfig | 1 + drivers/crypto/nx/nx-842-powernv.c | 435 +++++++++++++++++++++++++++++++++---- drivers/crypto/nx/nx-842.h | 8 + 5 files changed, 407 insertions(+), 42 deletions(-) -- 1.8.3.1
