IBM PowerPC processors starting at version P7+ contain a NX coprocessor that provides various hw-accelerated functions, one of which is memory compression to the IBM "842" compression format. This NX-842 coprocessor is already supported on the pSeries platform, by the nx-842.c driver and the crypto compression interface at crypto/842.c. This patch set adds support for NX-842 on the PowerNV (Non-Virtualized) platform. The existing pSeries platform NX-842 driver could not be re-used for the PowerNV platform driver, as there are fundamentally different interfaces; on pSeries the system hypervisor (pHyp) provides the interface and manages communication with the coprocessor, while on PowerNV the kernel talks directly to the coprocessor using the ICSWX instruction. The data structures used to describe each compression or decompression request to the coprocessor are also different between pHyp's interface and direct communication with ICSWX. So, different drivers for pSeries and PowerNV are required. Adding the new PowerNV driver but keeping the interface to the drivers the same required adding a new common frontend interface, to which only one of the platform drivers will connect (based on what platform the kernel is currently running on), and moving some functionality out of the existing pSeries driver into a more common location. Also, the crypto/842.c interface to the NX-842 hw driver is modified to be able to handle any alignment or length input or output buffer; currently with the pSeries driver only page-size and page-aligned (uncompressed) buffers are possible. The result is a crypto 842 interface that allows using any input and output buffers (i.e. any alignment and length) to communicate with the NX-842 hardware on either the pSeries or PowerNV platforms, as well as a generic 842 software decompressor that the crypto 842 interface falls back to if the NX-842 hardware fails and/or returns error during decompression. Finally, this also adds a generic crypto compression selftest module, that can verify correct compression/decompression cycles using variable alignment and length buffers, multiple threads, and can calculate the throughput. Dan Streetman (11): powerpc: export of_get_ibm_chip_id function powerpc: Add ICSWX instruction crypto: add software 842 decompression drivers/crypto/nx: move nx-842.c to nx-842-pseries.c drivers/crypto/nx: add NX-842 platform frontend driver drivers/crypto/nx: add nx842 constraints drivers/crypto/nx: add PowerNV platform NX-842 driver drivers/crypto/nx: simplify pSeries nx842 driver crypto: remove LZO fallback from crypto 842 crypto: rewrite crypto 842 to use nx842 constraints crypto: add crypto compression sefltest MAINTAINERS | 5 +- arch/powerpc/include/asm/icswx.h | 184 ++++ arch/powerpc/include/asm/ppc-opcode.h | 13 + arch/powerpc/kernel/prom.c | 1 + crypto/842.c | 495 ++++++++-- crypto/Kconfig | 13 +- crypto/Makefile | 1 + crypto/comp_selftest.c | 928 +++++++++++++++++++ drivers/crypto/Kconfig | 6 +- drivers/crypto/nx/Kconfig | 43 +- drivers/crypto/nx/Makefile | 4 + drivers/crypto/nx/nx-842-powernv.c | 623 +++++++++++++ drivers/crypto/nx/nx-842-pseries.c | 1126 +++++++++++++++++++++++ drivers/crypto/nx/nx-842.c | 1623 +++------------------------------ drivers/crypto/nx/nx-842.h | 131 +++ include/linux/nx842.h | 17 +- include/linux/sw842.h | 7 + lib/842/842_decompress.c | 413 +++++++++ lib/842/Makefile | 1 + lib/Kconfig | 3 + lib/Makefile | 1 + 21 files changed, 4001 insertions(+), 1637 deletions(-) create mode 100644 arch/powerpc/include/asm/icswx.h create mode 100644 crypto/comp_selftest.c create mode 100644 drivers/crypto/nx/nx-842-powernv.c create mode 100644 drivers/crypto/nx/nx-842-pseries.c create mode 100644 drivers/crypto/nx/nx-842.h create mode 100644 include/linux/sw842.h create mode 100644 lib/842/842_decompress.c create mode 100644 lib/842/Makefile -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
