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Sat, 17 Apr 2021 21:12:55 GMT Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 52A3C78060; Sat, 17 Apr 2021 21:12:55 +0000 (GMT) Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 10BA77805C; Sat, 17 Apr 2021 21:12:54 +0000 (GMT) Received: from localhost.localdomain (unknown [9.80.232.48]) by b03ledav004.gho.boulder.ibm.com (Postfix) with ESMTP; Sat, 17 Apr 2021 21:12:53 +0000 (GMT) Message-ID: Subject: [V3 PATCH 15/16] crypto/nx: Get NX capabilities for GZIP coprocessor type 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: Sat, 17 Apr 2021 14:12:51 -0700 In-Reply-To: References: User-Agent: Evolution 3.36.2 (3.36.2-1.fc32) MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: DqNnksXLh7vYaD9l1mK35uIfQaPb0l8W X-Proofpoint-ORIG-GUID: AplVzCIziz9w-4rpxAmsEvuRRkx05dof X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391,18.0.761 definitions=2021-04-17_12:2021-04-16,2021-04-17 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 adultscore=0 phishscore=0 suspectscore=0 mlxlogscore=999 impostorscore=0 clxscore=1015 spamscore=0 bulkscore=0 lowpriorityscore=0 mlxscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104060000 definitions=main-2104170152 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org phyp provides NX capabilities which gives recommended minimum compression / decompression length and maximum request buffer size in bytes. Changes to get NX overall capabilities which points to the specific features phyp supports. Then retrieve NXGZIP specific capabilities. Signed-off-by: Haren Myneni Acked-by: Herbert Xu --- drivers/crypto/nx/nx-common-pseries.c | 83 +++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) diff --git a/drivers/crypto/nx/nx-common-pseries.c b/drivers/crypto/nx/nx-common-pseries.c index 9a40fca8a9e6..49224870d05e 100644 --- a/drivers/crypto/nx/nx-common-pseries.c +++ b/drivers/crypto/nx/nx-common-pseries.c @@ -9,6 +9,7 @@ */ #include +#include #include #include "nx-842.h" @@ -20,6 +21,24 @@ MODULE_DESCRIPTION("842 H/W Compression driver for IBM Power processors"); MODULE_ALIAS_CRYPTO("842"); MODULE_ALIAS_CRYPTO("842-nx"); +struct nx_ct_capabs_be { + __be64 descriptor; + __be64 req_max_processed_len; /* Max bytes in one GZIP request */ + __be64 min_compress_len; /* Min compression size in bytes */ + __be64 min_decompress_len; /* Min decompression size in bytes */ +} __packed __aligned(0x1000); + +struct nx_ct_capabs { + char name[VAS_DESCR_LEN + 1]; + u64 descriptor; + u64 req_max_processed_len; /* Max bytes in one GZIP request */ + u64 min_compress_len; /* Min compression in bytes */ + u64 min_decompress_len; /* Min decompression in bytes */ +}; + +u64 capab_feat = 0; +struct nx_ct_capabs nx_ct_capab; + static struct nx842_constraints nx842_pseries_constraints = { .alignment = DDE_BUFFER_ALIGN, .multiple = DDE_BUFFER_LAST_MULT, @@ -1066,6 +1085,66 @@ static void nx842_remove(struct vio_dev *viodev) kfree(old_devdata); } +/* + * Get NX capabilities from pHyp. + * Only NXGZIP capabilities are available right now and these values + * are available through sysfs. + */ +static void __init nxct_get_capabilities(void) +{ + struct vas_all_capabs_be *capabs_be; + struct nx_ct_capabs_be *nxc_be; + int rc; + + capabs_be = kmalloc(sizeof(*capabs_be), GFP_KERNEL); + if (!capabs_be) + return; + /* + * Get NX overall capabilities with feature type=0 + */ + rc = plpar_vas_query_capabilities(H_QUERY_NX_CAPABILITIES, 0, + (u64)virt_to_phys(capabs_be)); + if (rc) + goto out; + + capab_feat = be64_to_cpu(capabs_be->feat_type); + /* + * NX-GZIP feature available + */ + if (capab_feat & VAS_NX_GZIP_FEAT_BIT) { + nxc_be = kmalloc(sizeof(*nxc_be), GFP_KERNEL); + if (!nxc_be) + goto out; + /* + * Get capabilities for NX-GZIP feature + */ + rc = plpar_vas_query_capabilities(H_QUERY_NX_CAPABILITIES, + VAS_NX_GZIP_FEAT, + (u64)virt_to_phys(nxc_be)); + } else { + pr_err("NX-GZIP feature is not available\n"); + rc = -EINVAL; + } + + if (!rc) { + snprintf(nx_ct_capab.name, VAS_DESCR_LEN + 1, "%.8s", + (char *)&nxc_be->descriptor); + nx_ct_capab.descriptor = be64_to_cpu(nxc_be->descriptor); + nx_ct_capab.req_max_processed_len = + be64_to_cpu(nxc_be->req_max_processed_len); + nx_ct_capab.min_compress_len = + be64_to_cpu(nxc_be->min_compress_len); + nx_ct_capab.min_decompress_len = + be64_to_cpu(nxc_be->min_decompress_len); + } else { + capab_feat = 0; + } + + kfree(nxc_be); +out: + kfree(capabs_be); +} + static const struct vio_device_id nx842_vio_driver_ids[] = { {"ibm,compression-v1", "ibm,compression"}, {"", ""}, @@ -1093,6 +1172,10 @@ static int __init nx842_pseries_init(void) return -ENOMEM; RCU_INIT_POINTER(devdata, new_devdata); + /* + * Get NX capabilities from pHyp which is used for NX-GZIP. + */ + nxct_get_capabilities(); ret = vio_register_driver(&nx842_vio_driver); if (ret) {