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Sat, 07 Mar 2020 00:28:01 +0000 Received: from b01ledav006.gho.pok.ibm.com (b01ledav006.gho.pok.ibm.com [9.57.199.111]) by b01cxnp22034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0270S0tX52298170 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 7 Mar 2020 00:28:00 GMT Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DA867AC059; Sat, 7 Mar 2020 00:28:00 +0000 (GMT) Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3E735AC05B; Sat, 7 Mar 2020 00:28:00 +0000 (GMT) Received: from [9.70.82.143] (unknown [9.70.82.143]) by b01ledav006.gho.pok.ibm.com (Postfix) with ESMTP; Sat, 7 Mar 2020 00:28:00 +0000 (GMT) Subject: [PATCH v3 0/9] crypto/nx: Enable GZIP engine and provide userpace API From: Haren Myneni To: herbert@gondor.apana.org.au, mpe@ellerman.id.au Content-Type: text/plain; charset="UTF-8" Date: Fri, 06 Mar 2020 16:27:57 -0800 Message-ID: <1583540877.9256.24.camel@hbabu-laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572 definitions=2020-03-06_09:2020-03-06, 2020-03-06 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 spamscore=0 mlxlogscore=999 lowpriorityscore=0 priorityscore=1501 bulkscore=0 adultscore=0 suspectscore=0 clxscore=1015 mlxscore=0 phishscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2003070000 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mikey@neuling.org, sukadev@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org, linux-crypto@vger.kernel.org, npiggin@gmail.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Power9 processor supports Virtual Accelerator Switchboard (VAS) which allows kernel and userspace to send compression requests to Nest Accelerator (NX) directly. The NX unit comprises of 2 842 compression engines and 1 GZIP engine. Linux kernel already has 842 compression support on kernel. This patch series adds GZIP compression support from user space. The GZIP Compression engine implements the ZLIB and GZIP compression algorithms. No plans of adding NX-GZIP compression support in kernel right now. Applications can send requests to NX directly with COPY/PASTE instructions. But kernel has to establish channel / window on NX-GZIP device for the userspace. So userspace access to the GZIP engine is provided through /dev/crypto/nx-gzip device with several operations. An application must open the this device to obtain a file descriptor (fd). Using the fd, application should issue the VAS_TX_WIN_OPEN ioctl to establish a connection to the engine. Once window is opened, should use mmap() system call to map the hardware address of engine's request queue into the application's virtual address space. Then user space forms the request as co-processor Request Block (CRB) and paste this CRB on the mapped HW address using COPY/PASTE instructions. Application can poll on status flags (part of CRB) with timeout for request completion. For VAS_TX_WIN_OPEN ioctl, if user space passes vas_id = -1 (struct vas_tx_win_open_attr), kernel determines the VAS instance on the corresponding chip based on the CPU on which the process is executing. Otherwise, the specified VAS instance is used if application passes the proper VAS instance (vas_id listed in /proc/device-tree/vas@*/ibm,vas_id). Process can open multiple windows with different FDs or can send several requests to NX on the same window at the same time. A userspace library libnxz is available: https://github.com/abalib/power-gzip Applications that use inflate/deflate calls can link with libNXz and use NX GZIP compression without any modification. Tested the available 842 compression on power8 and power9 system to make sure no regression and tested GZIP compression on power9 with tests available in the above link. Thanks to Bulent Abali for nxz library and tests development. Changelog: V2: - Move user space API code to powerpc as suggested. Also this API can be extended to any other coprocessor type that VAS can support in future. Example: Fast thread wakeup feature from VAS - Rebased to 5.6-rc3 V3: - Fix sparse warnings (patches 3&6) Haren Myneni (9): powerpc/vas: Initialize window attributes for GZIP coprocessor type powerpc/vas: Define VAS_TX_WIN_OPEN ioctl API powerpc/vas: Add VAS user space API crypto/nx: Initialize coproc entry with kzalloc crypto/nx: Rename nx-842-powernv file name to nx-common-powernv crypto/NX: Make enable code generic to add new GZIP compression type crypto/nx: Enable and setup GZIP compresstion type crypto/nx: Remove 'pid' in vas_tx_win_attr struct Documentation/powerpc: VAS API Documentation/powerpc/index.rst | 1 + Documentation/powerpc/vas-api.rst | 246 +++++ Documentation/userspace-api/ioctl/ioctl-number.rst | 1 + arch/powerpc/include/asm/vas.h | 12 +- arch/powerpc/include/uapi/asm/vas-api.h | 22 + arch/powerpc/platforms/powernv/Makefile | 2 +- arch/powerpc/platforms/powernv/vas-api.c | 290 +++++ arch/powerpc/platforms/powernv/vas-window.c | 23 +- arch/powerpc/platforms/powernv/vas.h | 2 + drivers/crypto/nx/Makefile | 2 +- drivers/crypto/nx/nx-842-powernv.c | 1062 ------------------ drivers/crypto/nx/nx-common-powernv.c | 1133 ++++++++++++++++++++ 12 files changed, 1723 insertions(+), 1073 deletions(-) create mode 100644 Documentation/powerpc/vas-api.rst create mode 100644 arch/powerpc/include/uapi/asm/vas-api.h create mode 100644 arch/powerpc/platforms/powernv/vas-api.c delete mode 100644 drivers/crypto/nx/nx-842-powernv.c create mode 100644 drivers/crypto/nx/nx-common-powernv.c -- 1.8.3.1