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Fri, 21 May 2021 05:42:42 -0400 Received: from m0098421.ppops.net (m0098421.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 14L9gg2o042267; Fri, 21 May 2021 05:42:42 -0400 Received: from ppma03dal.us.ibm.com (b.bd.3ea9.ip4.static.sl-reverse.com [169.62.189.11]) by mx0a-001b2d01.pphosted.com with ESMTP id 38p8wvjbnt-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 21 May 2021 05:42:42 -0400 Received: from pps.filterd (ppma03dal.us.ibm.com [127.0.0.1]) by ppma03dal.us.ibm.com (8.16.0.43/8.16.0.43) with SMTP id 14L9YMqd007692; Fri, 21 May 2021 09:42:41 GMT Received: from b01cxnp22035.gho.pok.ibm.com (b01cxnp22035.gho.pok.ibm.com [9.57.198.25]) by ppma03dal.us.ibm.com with ESMTP id 38j5xaa8m0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 21 May 2021 09:42:41 +0000 Received: from b01ledav004.gho.pok.ibm.com (b01ledav004.gho.pok.ibm.com [9.57.199.109]) by b01cxnp22035.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 14L9geiD33751546 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 21 May 2021 09:42:40 GMT Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A405A112062; Fri, 21 May 2021 09:42:40 +0000 (GMT) Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A3E3F112061; Fri, 21 May 2021 09:42:39 +0000 (GMT) Received: from sig-9-65-94-165.ibm.com (unknown [9.65.94.165]) by b01ledav004.gho.pok.ibm.com (Postfix) with ESMTP; Fri, 21 May 2021 09:42:39 +0000 (GMT) Message-ID: <35bca44c5a8af7bdffbe03b22fd82713bced8d0e.camel@linux.ibm.com> Subject: [PATCH v4 16/16] crypto/nx: Add sysfs interface to export NX capabilities From: Haren Myneni To: linuxppc-dev@lists.ozlabs.org, linux-crypto@vger.kernel.org, mpe@ellerman.id.au, herbert@gondor.apana.org.au, npiggin@gmail.com Cc: hbabu@us.ibm.com, haren@us.ibm.com Date: Fri, 21 May 2021 02:42:37 -0700 In-Reply-To: <8d219c0816133a8643d650709066cf04c9c77322.camel@linux.ibm.com> References: <8d219c0816133a8643d650709066cf04c9c77322.camel@linux.ibm.com> User-Agent: Evolution 3.36.2 (3.36.2-1.fc32) MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: utbOSzOp0QqEut9rGVxhvAQB18XlImms X-Proofpoint-ORIG-GUID: tN5eMp1jtk6mAYs3WFwwYpFsEUgIzMc5 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-05-21_03:2021-05-20,2021-05-21 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 phishscore=0 malwarescore=0 priorityscore=1501 suspectscore=0 bulkscore=0 mlxscore=0 adultscore=0 impostorscore=0 mlxlogscore=999 clxscore=1015 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2105210061 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Changes to export the following NXGZIP capabilities through sysfs: /sys/devices/vio/ibm,compression-v1/NxGzCaps: min_compress_len /*Recommended minimum compress length in bytes*/ min_decompress_len /*Recommended minimum decompress length in bytes*/ req_max_processed_len /* Maximum number of bytes processed in one request */ NX will return RMA_Reject if the request buffer size is greater than req_max_processed_len. Signed-off-by: Haren Myneni Acked-by: Herbert Xu --- drivers/crypto/nx/nx-common-pseries.c | 43 +++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/crypto/nx/nx-common-pseries.c b/drivers/crypto/nx/nx-common-pseries.c index 4a7278464156..121718a337fd 100644 --- a/drivers/crypto/nx/nx-common-pseries.c +++ b/drivers/crypto/nx/nx-common-pseries.c @@ -968,6 +968,36 @@ static struct attribute_group nx842_attribute_group = { .attrs = nx842_sysfs_entries, }; +#define nxct_caps_read(_name) \ +static ssize_t nxct_##_name##_show(struct device *dev, \ + struct device_attribute *attr, char *buf) \ +{ \ + return sprintf(buf, "%lld\n", nx_ct_caps._name); \ +} + +#define NXCT_ATTR_RO(_name) \ + nxct_caps_read(_name); \ + static struct device_attribute dev_attr_##_name = __ATTR(_name, \ + 0444, \ + nxct_##_name##_show, \ + NULL); + +NXCT_ATTR_RO(req_max_processed_len); +NXCT_ATTR_RO(min_compress_len); +NXCT_ATTR_RO(min_decompress_len); + +static struct attribute *nxct_caps_sysfs_entries[] = { + &dev_attr_req_max_processed_len.attr, + &dev_attr_min_compress_len.attr, + &dev_attr_min_decompress_len.attr, + NULL, +}; + +static struct attribute_group nxct_caps_attr_group = { + .name = nx_ct_caps.name, + .attrs = nxct_caps_sysfs_entries, +}; + static struct nx842_driver nx842_pseries_driver = { .name = KBUILD_MODNAME, .owner = THIS_MODULE, @@ -1057,6 +1087,16 @@ static int nx842_probe(struct vio_dev *viodev, goto error; } + if (caps_feat) { + if (sysfs_create_group(&viodev->dev.kobj, + &nxct_caps_attr_group)) { + dev_err(&viodev->dev, + "Could not create sysfs NX capability entries\n"); + ret = -1; + goto error; + } + } + return 0; error_unlock: @@ -1076,6 +1116,9 @@ static void nx842_remove(struct vio_dev *viodev) pr_info("Removing IBM Power 842 compression device\n"); sysfs_remove_group(&viodev->dev.kobj, &nx842_attribute_group); + if (caps_feat) + sysfs_remove_group(&viodev->dev.kobj, &nxct_caps_attr_group); + crypto_unregister_alg(&nx842_pseries_alg); spin_lock_irqsave(&devdata_mutex, flags);