From patchwork Sun Dec 15 12:50:39 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Haren Myneni X-Patchwork-Id: 11292769 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9D0C4112B for ; Sun, 15 Dec 2019 12:53:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 84D0B20726 for ; Sun, 15 Dec 2019 12:53:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726136AbfLOMxA (ORCPT ); Sun, 15 Dec 2019 07:53:00 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:47170 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726135AbfLOMw7 (ORCPT ); Sun, 15 Dec 2019 07:52:59 -0500 Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id xBFCqAlZ095443; Sun, 15 Dec 2019 07:52:32 -0500 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 2wwdpx38pv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 15 Dec 2019 07:52:31 -0500 Received: from m0098409.ppops.net (m0098409.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id xBFCqVQ4096177; Sun, 15 Dec 2019 07:52:31 -0500 Received: from ppma04dal.us.ibm.com (7a.29.35a9.ip4.static.sl-reverse.com [169.53.41.122]) by mx0a-001b2d01.pphosted.com with ESMTP id 2wwdpx38pf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 15 Dec 2019 07:52:31 -0500 Received: from pps.filterd (ppma04dal.us.ibm.com [127.0.0.1]) by ppma04dal.us.ibm.com (8.16.0.27/8.16.0.27) with SMTP id xBFCoXdE009159; Sun, 15 Dec 2019 12:52:30 GMT Received: from b01cxnp22035.gho.pok.ibm.com (b01cxnp22035.gho.pok.ibm.com [9.57.198.25]) by ppma04dal.us.ibm.com with ESMTP id 2wvqc5x5y7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 15 Dec 2019 12:52:30 +0000 Received: from b01ledav006.gho.pok.ibm.com (b01ledav006.gho.pok.ibm.com [9.57.199.111]) by b01cxnp22035.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id xBFCqTrd52560196 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 15 Dec 2019 12:52:29 GMT Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DBF52AC059; Sun, 15 Dec 2019 12:52:29 +0000 (GMT) Received: from b01ledav006.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1D90CAC062; Sun, 15 Dec 2019 12:52:29 +0000 (GMT) Received: from [9.70.82.143] (unknown [9.70.82.143]) by b01ledav006.gho.pok.ibm.com (Postfix) with ESMTP; Sun, 15 Dec 2019 12:52:28 +0000 (GMT) Subject: [PATCH 00/10] crypto/nx: Enable GZIP engine and provide userpace API From: Haren Myneni To: herbert@gondor.apana.org.au, mpe@ellerman.id.au, linux-crypto@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, hch@infradead.org, npiggin@gmail.com, mikey@neuling.org Cc: sukadev@linux.vnet.ibm.com, hbabu@us.ibm.com Date: Sun, 15 Dec 2019 04:50:39 -0800 Message-ID: <1576414240.16318.4066.camel@hbabu-laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-12-15_03:2019-12-13,2019-12-15 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 priorityscore=1501 suspectscore=0 lowpriorityscore=0 spamscore=0 clxscore=1011 impostorscore=0 mlxlogscore=999 malwarescore=0 bulkscore=0 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-1912150123 Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org 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 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 determins 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. Haren Myneni (10): powerpc/vas: Define vas_win_paste_addr() powerpc/vas: Initialize window attributes for GZIP coprocessor type powerpc/vas: Define VAS_TX_WIN_OPEN ioctl API crypto/nx: Initialize coproc entry with kzalloc crypto/nx: Organize powernv 842 code to add new GZIP compression type crypto/NX: Make code generic to add new GZIP compression type crypto/nx: Enable and setup GZIP compresstion type crypto/NX: Add NX GZIP user space API powerpc/vas: Remove 'pid' in vas_tx_win_attr struct Documentation/powerpc: VAS API Documentation/ioctl/ioctl-number.rst | 1 + Documentation/powerpc/index.rst | 1 + Documentation/powerpc/vas-api.rst | 246 +++++++++++++++ arch/powerpc/include/asm/vas.h | 6 +- arch/powerpc/include/uapi/asm/vas-api.h | 22 ++ arch/powerpc/platforms/powernv/vas-window.c | 27 +- drivers/crypto/nx/Makefile | 2 +- drivers/crypto/nx/nx-842-powernv.c | 412 +----------------------- drivers/crypto/nx/nx-842-powernv.h | 31 ++ drivers/crypto/nx/nx-commom-powernv.c | 474 ++++++++++++++++++++++++++++ drivers/crypto/nx/nx-gzip-powernv.c | 282 +++++++++++++++++ 11 files changed, 1094 insertions(+), 410 deletions(-) create mode 100644 Documentation/powerpc/vas-api.rst create mode 100644 arch/powerpc/include/uapi/asm/vas-api.h create mode 100644 drivers/crypto/nx/nx-842-powernv.h create mode 100644 drivers/crypto/nx/nx-commom-powernv.c create mode 100644 drivers/crypto/nx/nx-gzip-powernv.c