On Fri, Jul 21, 2017 at 10:01:42PM -0700, Haren Myneni wrote: > > This patch adds P9 NX support for 842 compression engine. Virtual > Accelerator Switchboard (VAS) is used to access 842 engine on P9. > > For each NX engine per chip, setup receive window using > vas_rx_win_open() which configures RxFIFo with FIFO address, lpid, > pid and tid values. This unique (lpid, pid, tid) combination will > be used to identify the target engine. > > For crypto open request, open send window on the NX engine for > the corresponding chip / cpu where the open request is executed. > This send window will be closed upon crypto close request. > > NX provides high and normal priority FIFOs. For compression / > decompression requests, we use only hight priority FIFOs in kernel. > > Each NX request will be communicated to VAS using copy/paste > instructions with vas_copy_crb() / vas_paste_crb() functions. > Reviewed-by: Ram Pai <linuxram@xxxxxxxxxx> > Signed-off-by: Haren Myneni <haren@xxxxxxxxxx> > --- > drivers/crypto/nx/Kconfig | 1 + > drivers/crypto/nx/nx-842-powernv.c | 375 ++++++++++++++++++++++++++++++++++++- > drivers/crypto/nx/nx-842.c | 2 +- > 3 files changed, 371 insertions(+), 7 deletions(-)
