From patchwork Fri May 29 22:05:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vaibhav Jain X-Patchwork-Id: 11579725 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 6F0D514F6 for ; Fri, 29 May 2020 22:06:29 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 551D020776 for ; Fri, 29 May 2020 22:06:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 551D020776 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 53E4C100F227E; Fri, 29 May 2020 15:02:02 -0700 (PDT) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=148.163.158.5; helo=mx0b-001b2d01.pphosted.com; envelope-from=vaibhav@linux.ibm.com; receiver= Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 7F830100F2276 for ; Fri, 29 May 2020 15:02:00 -0700 (PDT) Received: from pps.filterd (m0127361.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 04TM3XZE011681; Fri, 29 May 2020 18:06:24 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 31as1bchyk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 29 May 2020 18:06:24 -0400 Received: from m0127361.ppops.net (m0127361.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.36/8.16.0.36) with SMTP id 04TM45ft013190; Fri, 29 May 2020 18:06:24 -0400 Received: from ppma01fra.de.ibm.com (46.49.7a9f.ip4.static.sl-reverse.com [159.122.73.70]) by mx0a-001b2d01.pphosted.com with ESMTP id 31as1bchxf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 29 May 2020 18:06:24 -0400 Received: from pps.filterd (ppma01fra.de.ibm.com [127.0.0.1]) by ppma01fra.de.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 04TM61H1001292; Fri, 29 May 2020 22:06:20 GMT Received: from b06cxnps4075.portsmouth.uk.ibm.com (d06relay12.portsmouth.uk.ibm.com [9.149.109.197]) by ppma01fra.de.ibm.com with ESMTP id 316uf8n7pd-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 29 May 2020 22:06:20 +0000 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 04TM6Gmi3277130 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 29 May 2020 22:06:17 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CDB504C04A; Fri, 29 May 2020 22:06:16 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 21CF14C046; Fri, 29 May 2020 22:06:13 +0000 (GMT) Received: from vajain21-in-ibm-com (unknown [9.199.34.115]) by d06av22.portsmouth.uk.ibm.com (Postfix) with SMTP; Fri, 29 May 2020 22:06:12 +0000 (GMT) Received: by vajain21-in-ibm-com (sSMTP sendmail emulation); Sat, 30 May 2020 03:36:11 +0530 From: Vaibhav Jain To: linux-nvdimm@lists.01.org Subject: [ndctl PATCH v5 1/6] libndctl: Refactor out add_dimm() to handle NFIT specific init Date: Sat, 30 May 2020 03:35:55 +0530 Message-Id: <20200529220600.225320-2-vaibhav@linux.ibm.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200529220600.225320-1-vaibhav@linux.ibm.com> References: <20200529220600.225320-1-vaibhav@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216,18.0.687 definitions=2020-05-29_13:2020-05-28,2020-05-29 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 priorityscore=1501 spamscore=0 mlxscore=0 suspectscore=3 malwarescore=0 lowpriorityscore=0 bulkscore=0 adultscore=0 phishscore=0 clxscore=1015 impostorscore=0 cotscore=-2147483648 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2005290159 Message-ID-Hash: OXEYOSDTZO7NIAMLFVIN3P4ANFHJ7XMR X-Message-ID-Hash: OXEYOSDTZO7NIAMLFVIN3P4ANFHJ7XMR X-MailFrom: vaibhav@linux.ibm.com X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation CC: Vaibhav Jain , "Aneesh Kumar K . V" X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: Presently add_dimm() only probes dimms that support NFIT/ACPI. Hence this patch refactors this functionality into two functions namely add_dimm() and add_nfit_dimm(). Function add_dimm() performs allocation and common 'struct ndctl_dimm' initialization and depending on whether the dimm-bus supports NIFT, calls add_nfit_dimm(). Once the probe is completed based on the value of 'ndctl_dimm.cmd_family' appropriate dimm-ops are assigned to the dimm. In case dimm-bus is of unknown type or doesn't support NFIT the initialization still continues, with no dimm-ops assigned to the 'struct ndctl_dimm' there-by limiting the functionality available. This patch shouldn't introduce any behavioral change. Signed-off-by: Vaibhav Jain --- Changelog: v4..v5: * None v3..v4: * None v2..v3: * None v1..v2: * None --- ndctl/lib/libndctl.c | 193 +++++++++++++++++++++++++------------------ 1 file changed, 112 insertions(+), 81 deletions(-) diff --git a/ndctl/lib/libndctl.c b/ndctl/lib/libndctl.c index ee737cbbfe3e..d76dbf7e17de 100644 --- a/ndctl/lib/libndctl.c +++ b/ndctl/lib/libndctl.c @@ -1441,82 +1441,15 @@ static int ndctl_bind(struct ndctl_ctx *ctx, struct kmod_module *module, static int ndctl_unbind(struct ndctl_ctx *ctx, const char *devpath); static struct kmod_module *to_module(struct ndctl_ctx *ctx, const char *alias); -static void *add_dimm(void *parent, int id, const char *dimm_base) +static int add_nfit_dimm(struct ndctl_dimm *dimm, const char *dimm_base) { - int formats, i; - struct ndctl_dimm *dimm; + int i, rc = -1; char buf[SYSFS_ATTR_SIZE]; - struct ndctl_bus *bus = parent; - struct ndctl_ctx *ctx = bus->ctx; + struct ndctl_ctx *ctx = dimm->bus->ctx; char *path = calloc(1, strlen(dimm_base) + 100); if (!path) - return NULL; - - sprintf(path, "%s/nfit/formats", dimm_base); - if (sysfs_read_attr(ctx, path, buf) < 0) - formats = 1; - else - formats = clamp(strtoul(buf, NULL, 0), 1UL, 2UL); - - dimm = calloc(1, sizeof(*dimm) + sizeof(int) * formats); - if (!dimm) - goto err_dimm; - dimm->bus = bus; - dimm->id = id; - - sprintf(path, "%s/dev", dimm_base); - if (sysfs_read_attr(ctx, path, buf) < 0) - goto err_read; - if (sscanf(buf, "%d:%d", &dimm->major, &dimm->minor) != 2) - goto err_read; - - sprintf(path, "%s/commands", dimm_base); - if (sysfs_read_attr(ctx, path, buf) < 0) - goto err_read; - dimm->cmd_mask = parse_commands(buf, 1); - - dimm->dimm_buf = calloc(1, strlen(dimm_base) + 50); - if (!dimm->dimm_buf) - goto err_read; - dimm->buf_len = strlen(dimm_base) + 50; - - dimm->dimm_path = strdup(dimm_base); - if (!dimm->dimm_path) - goto err_read; - - sprintf(path, "%s/modalias", dimm_base); - if (sysfs_read_attr(ctx, path, buf) < 0) - goto err_read; - dimm->module = to_module(ctx, buf); - - dimm->handle = -1; - dimm->phys_id = -1; - dimm->serial = -1; - dimm->vendor_id = -1; - dimm->device_id = -1; - dimm->revision_id = -1; - dimm->health_eventfd = -1; - dimm->dirty_shutdown = -ENOENT; - dimm->subsystem_vendor_id = -1; - dimm->subsystem_device_id = -1; - dimm->subsystem_revision_id = -1; - dimm->manufacturing_date = -1; - dimm->manufacturing_location = -1; - dimm->cmd_family = -1; - dimm->nfit_dsm_mask = ULONG_MAX; - for (i = 0; i < formats; i++) - dimm->format[i] = -1; - - sprintf(path, "%s/flags", dimm_base); - if (sysfs_read_attr(ctx, path, buf) < 0) { - dimm->locked = -1; - dimm->aliased = -1; - } else - parse_dimm_flags(dimm, buf); - - if (!ndctl_bus_has_nfit(bus)) - goto out; + return -1; /* * 'unique_id' may not be available on older kernels, so don't @@ -1582,24 +1515,15 @@ static void *add_dimm(void *parent, int id, const char *dimm_base) sprintf(path, "%s/nfit/family", dimm_base); if (sysfs_read_attr(ctx, path, buf) == 0) dimm->cmd_family = strtoul(buf, NULL, 0); - if (dimm->cmd_family == NVDIMM_FAMILY_INTEL) - dimm->ops = intel_dimm_ops; - if (dimm->cmd_family == NVDIMM_FAMILY_HPE1) - dimm->ops = hpe1_dimm_ops; - if (dimm->cmd_family == NVDIMM_FAMILY_MSFT) - dimm->ops = msft_dimm_ops; - if (dimm->cmd_family == NVDIMM_FAMILY_HYPERV) - dimm->ops = hyperv_dimm_ops; sprintf(path, "%s/nfit/dsm_mask", dimm_base); if (sysfs_read_attr(ctx, path, buf) == 0) dimm->nfit_dsm_mask = strtoul(buf, NULL, 0); - dimm->formats = formats; sprintf(path, "%s/nfit/format", dimm_base); if (sysfs_read_attr(ctx, path, buf) == 0) dimm->format[0] = strtoul(buf, NULL, 0); - for (i = 1; i < formats; i++) { + for (i = 1; i < dimm->formats; i++) { sprintf(path, "%s/nfit/format%d", dimm_base, i); if (sysfs_read_attr(ctx, path, buf) == 0) dimm->format[i] = strtoul(buf, NULL, 0); @@ -1610,7 +1534,114 @@ static void *add_dimm(void *parent, int id, const char *dimm_base) parse_nfit_mem_flags(dimm, buf); dimm->health_eventfd = open(path, O_RDONLY|O_CLOEXEC); + rc = 0; + err_read: + + free(path); + return rc; +} + +static void *add_dimm(void *parent, int id, const char *dimm_base) +{ + int formats, i, rc = -ENODEV; + struct ndctl_dimm *dimm = NULL; + char buf[SYSFS_ATTR_SIZE]; + struct ndctl_bus *bus = parent; + struct ndctl_ctx *ctx = bus->ctx; + char *path = calloc(1, strlen(dimm_base) + 100); + + if (!path) + return NULL; + + sprintf(path, "%s/nfit/formats", dimm_base); + if (sysfs_read_attr(ctx, path, buf) < 0) + formats = 1; + else + formats = clamp(strtoul(buf, NULL, 0), 1UL, 2UL); + + dimm = calloc(1, sizeof(*dimm) + sizeof(int) * formats); + if (!dimm) + goto err_dimm; + dimm->bus = bus; + dimm->id = id; + + sprintf(path, "%s/dev", dimm_base); + if (sysfs_read_attr(ctx, path, buf) < 0) + goto err_read; + if (sscanf(buf, "%d:%d", &dimm->major, &dimm->minor) != 2) + goto err_read; + + sprintf(path, "%s/commands", dimm_base); + if (sysfs_read_attr(ctx, path, buf) < 0) + goto err_read; + dimm->cmd_mask = parse_commands(buf, 1); + + dimm->dimm_buf = calloc(1, strlen(dimm_base) + 50); + if (!dimm->dimm_buf) + goto err_read; + dimm->buf_len = strlen(dimm_base) + 50; + + dimm->dimm_path = strdup(dimm_base); + if (!dimm->dimm_path) + goto err_read; + + sprintf(path, "%s/modalias", dimm_base); + if (sysfs_read_attr(ctx, path, buf) < 0) + goto err_read; + dimm->module = to_module(ctx, buf); + + dimm->handle = -1; + dimm->phys_id = -1; + dimm->serial = -1; + dimm->vendor_id = -1; + dimm->device_id = -1; + dimm->revision_id = -1; + dimm->health_eventfd = -1; + dimm->dirty_shutdown = -ENOENT; + dimm->subsystem_vendor_id = -1; + dimm->subsystem_device_id = -1; + dimm->subsystem_revision_id = -1; + dimm->manufacturing_date = -1; + dimm->manufacturing_location = -1; + dimm->cmd_family = -1; + dimm->nfit_dsm_mask = ULONG_MAX; + for (i = 0; i < formats; i++) + dimm->format[i] = -1; + + sprintf(path, "%s/flags", dimm_base); + if (sysfs_read_attr(ctx, path, buf) < 0) { + dimm->locked = -1; + dimm->aliased = -1; + } else + parse_dimm_flags(dimm, buf); + + /* Check if the given dimm supports nfit */ + if (ndctl_bus_has_nfit(bus)) { + dimm->formats = formats; + rc = add_nfit_dimm(dimm, dimm_base); + } + + if (rc == -ENODEV) { + /* Unprobed dimm with no family */ + rc = 0; + goto out; + } + + /* Assign dimm-ops based on command family */ + if (dimm->cmd_family == NVDIMM_FAMILY_INTEL) + dimm->ops = intel_dimm_ops; + if (dimm->cmd_family == NVDIMM_FAMILY_HPE1) + dimm->ops = hpe1_dimm_ops; + if (dimm->cmd_family == NVDIMM_FAMILY_MSFT) + dimm->ops = msft_dimm_ops; + if (dimm->cmd_family == NVDIMM_FAMILY_HYPERV) + dimm->ops = hyperv_dimm_ops; out: + if (rc) { + err(ctx, "Unable to probe dimm:%d. Err:%d\n", id, rc); + goto err_read; + } + list_add(&bus->dimms, &dimm->list); free(path);