From 9a61d0838cd0a81529badfba7bfa39e81d5529d3 Mon Sep 17 00:00:00 2001 From: Kajol Jain Date: Fri, 25 Feb 2022 20:00:21 +0530 Subject: drivers/nvdimm: Add nvdimm pmu structure A structure is added called nvdimm_pmu, for performance stats reporting support of nvdimm devices. It can be used to add device pmu data such as pmu data structure for performance stats, nvdimm device pointer along with cpumask attributes. Acked-by: Peter Zijlstra (Intel) Tested-by: Nageswara R Sastry Signed-off-by: Kajol Jain Reviewed-by: Madhavan Srinivasan Link: https://lore.kernel.org/r/20220225143024.47947-2-kjain@linux.ibm.com Signed-off-by: Dan Williams --- include/linux/nd.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'include/linux') diff --git a/include/linux/nd.h b/include/linux/nd.h index 8a8c63edb1b2..ad186e828263 100644 --- a/include/linux/nd.h +++ b/include/linux/nd.h @@ -8,6 +8,7 @@ #include #include #include +#include enum nvdimm_event { NVDIMM_REVALIDATE_POISON, @@ -23,6 +24,25 @@ enum nvdimm_claim_class { NVDIMM_CCLASS_UNKNOWN, }; +/** + * struct nvdimm_pmu - data structure for nvdimm perf driver + * @pmu: pmu data structure for nvdimm performance stats. + * @dev: nvdimm device pointer. + * @cpu: designated cpu for counter access. + * @node: node for cpu hotplug notifier link. + * @cpuhp_state: state for cpu hotplug notification. + * @arch_cpumask: cpumask to get designated cpu for counter access. + */ +struct nvdimm_pmu { + struct pmu pmu; + struct device *dev; + int cpu; + struct hlist_node node; + enum cpuhp_state cpuhp_state; + /* cpumask provided by arch/platform specific code */ + struct cpumask arch_cpumask; +}; + struct nd_device_driver { struct device_driver drv; unsigned long type; -- cgit v1.2.3 From 0fab1ba6ad6ba1f76380f92ead95c6e861ef8116 Mon Sep 17 00:00:00 2001 From: Kajol Jain Date: Fri, 25 Feb 2022 20:00:22 +0530 Subject: drivers/nvdimm: Add perf interface to expose nvdimm performance stats A common interface is added to get performance stats reporting support for nvdimm devices. Added interface defines supported event list, config fields for the event attributes and their corresponding bit values which are exported via sysfs. Interface also added support for pmu register/unregister functions, cpu hotplug feature along with macros for handling events addition via sysfs. It adds attribute groups for format, cpumask and events to the pmu structure. User could use the standard perf tool to access perf events exposed via nvdimm pmu. [Declare pmu functions in nd.h file to resolve implicit-function-declaration warning and make hotplug function static as reported by kernel test robot] Acked-by: Peter Zijlstra (Intel) Tested-by: Nageswara R Sastry Signed-off-by: Kajol Jain Link: https://lore.kernel.org/all/202202241242.zqzGkguy-lkp@intel.com/ Reported-by: kernel test robot Reviewed-by: Madhavan Srinivasan Link: https://lore.kernel.org/r/20220225143024.47947-3-kjain@linux.ibm.com Signed-off-by: Dan Williams --- drivers/nvdimm/Makefile | 1 + drivers/nvdimm/nd_perf.c | 328 +++++++++++++++++++++++++++++++++++++++++++++++ include/linux/nd.h | 24 ++++ 3 files changed, 353 insertions(+) create mode 100644 drivers/nvdimm/nd_perf.c (limited to 'include/linux') diff --git a/drivers/nvdimm/Makefile b/drivers/nvdimm/Makefile index 29203f3d3069..25dba6095612 100644 --- a/drivers/nvdimm/Makefile +++ b/drivers/nvdimm/Makefile @@ -18,6 +18,7 @@ nd_e820-y := e820.o libnvdimm-y := core.o libnvdimm-y += bus.o libnvdimm-y += dimm_devs.o +libnvdimm-y += nd_perf.o libnvdimm-y += dimm.o libnvdimm-y += region_devs.o libnvdimm-y += region.o diff --git a/drivers/nvdimm/nd_perf.c b/drivers/nvdimm/nd_perf.c new file mode 100644 index 000000000000..314415894acf --- /dev/null +++ b/drivers/nvdimm/nd_perf.c @@ -0,0 +1,328 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * nd_perf.c: NVDIMM Device Performance Monitoring Unit support + * + * Perf interface to expose nvdimm performance stats. + * + * Copyright (C) 2021 IBM Corporation + */ + +#define pr_fmt(fmt) "nvdimm_pmu: " fmt + +#include + +#define EVENT(_name, _code) enum{_name = _code} + +/* + * NVDIMM Events codes. + */ + +/* Controller Reset Count */ +EVENT(CTL_RES_CNT, 0x1); +/* Controller Reset Elapsed Time */ +EVENT(CTL_RES_TM, 0x2); +/* Power-on Seconds */ +EVENT(POWERON_SECS, 0x3); +/* Life Remaining */ +EVENT(MEM_LIFE, 0x4); +/* Critical Resource Utilization */ +EVENT(CRI_RES_UTIL, 0x5); +/* Host Load Count */ +EVENT(HOST_L_CNT, 0x6); +/* Host Store Count */ +EVENT(HOST_S_CNT, 0x7); +/* Host Store Duration */ +EVENT(HOST_S_DUR, 0x8); +/* Host Load Duration */ +EVENT(HOST_L_DUR, 0x9); +/* Media Read Count */ +EVENT(MED_R_CNT, 0xa); +/* Media Write Count */ +EVENT(MED_W_CNT, 0xb); +/* Media Read Duration */ +EVENT(MED_R_DUR, 0xc); +/* Media Write Duration */ +EVENT(MED_W_DUR, 0xd); +/* Cache Read Hit Count */ +EVENT(CACHE_RH_CNT, 0xe); +/* Cache Write Hit Count */ +EVENT(CACHE_WH_CNT, 0xf); +/* Fast Write Count */ +EVENT(FAST_W_CNT, 0x10); + +NVDIMM_EVENT_ATTR(ctl_res_cnt, CTL_RES_CNT); +NVDIMM_EVENT_ATTR(ctl_res_tm, CTL_RES_TM); +NVDIMM_EVENT_ATTR(poweron_secs, POWERON_SECS); +NVDIMM_EVENT_ATTR(mem_life, MEM_LIFE); +NVDIMM_EVENT_ATTR(cri_res_util, CRI_RES_UTIL); +NVDIMM_EVENT_ATTR(host_l_cnt, HOST_L_CNT); +NVDIMM_EVENT_ATTR(host_s_cnt, HOST_S_CNT); +NVDIMM_EVENT_ATTR(host_s_dur, HOST_S_DUR); +NVDIMM_EVENT_ATTR(host_l_dur, HOST_L_DUR); +NVDIMM_EVENT_ATTR(med_r_cnt, MED_R_CNT); +NVDIMM_EVENT_ATTR(med_w_cnt, MED_W_CNT); +NVDIMM_EVENT_ATTR(med_r_dur, MED_R_DUR); +NVDIMM_EVENT_ATTR(med_w_dur, MED_W_DUR); +NVDIMM_EVENT_ATTR(cache_rh_cnt, CACHE_RH_CNT); +NVDIMM_EVENT_ATTR(cache_wh_cnt, CACHE_WH_CNT); +NVDIMM_EVENT_ATTR(fast_w_cnt, FAST_W_CNT); + +static struct attribute *nvdimm_events_attr[] = { + NVDIMM_EVENT_PTR(CTL_RES_CNT), + NVDIMM_EVENT_PTR(CTL_RES_TM), + NVDIMM_EVENT_PTR(POWERON_SECS), + NVDIMM_EVENT_PTR(MEM_LIFE), + NVDIMM_EVENT_PTR(CRI_RES_UTIL), + NVDIMM_EVENT_PTR(HOST_L_CNT), + NVDIMM_EVENT_PTR(HOST_S_CNT), + NVDIMM_EVENT_PTR(HOST_S_DUR), + NVDIMM_EVENT_PTR(HOST_L_DUR), + NVDIMM_EVENT_PTR(MED_R_CNT), + NVDIMM_EVENT_PTR(MED_W_CNT), + NVDIMM_EVENT_PTR(MED_R_DUR), + NVDIMM_EVENT_PTR(MED_W_DUR), + NVDIMM_EVENT_PTR(CACHE_RH_CNT), + NVDIMM_EVENT_PTR(CACHE_WH_CNT), + NVDIMM_EVENT_PTR(FAST_W_CNT), + NULL +}; + +static struct attribute_group nvdimm_pmu_events_group = { + .name = "events", + .attrs = nvdimm_events_attr, +}; + +PMU_FORMAT_ATTR(event, "config:0-4"); + +static struct attribute *nvdimm_pmu_format_attr[] = { + &format_attr_event.attr, + NULL, +}; + +static struct attribute_group nvdimm_pmu_format_group = { + .name = "format", + .attrs = nvdimm_pmu_format_attr, +}; + +ssize_t nvdimm_events_sysfs_show(struct device *dev, + struct device_attribute *attr, char *page) +{ + struct perf_pmu_events_attr *pmu_attr; + + pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr); + + return sprintf(page, "event=0x%02llx\n", pmu_attr->id); +} + +static ssize_t nvdimm_pmu_cpumask_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pmu *pmu = dev_get_drvdata(dev); + struct nvdimm_pmu *nd_pmu; + + nd_pmu = container_of(pmu, struct nvdimm_pmu, pmu); + + return cpumap_print_to_pagebuf(true, buf, cpumask_of(nd_pmu->cpu)); +} + +static int nvdimm_pmu_cpu_offline(unsigned int cpu, struct hlist_node *node) +{ + struct nvdimm_pmu *nd_pmu; + u32 target; + int nodeid; + const struct cpumask *cpumask; + + nd_pmu = hlist_entry_safe(node, struct nvdimm_pmu, node); + + /* Clear it, incase given cpu is set in nd_pmu->arch_cpumask */ + cpumask_test_and_clear_cpu(cpu, &nd_pmu->arch_cpumask); + + /* + * If given cpu is not same as current designated cpu for + * counter access, just return. + */ + if (cpu != nd_pmu->cpu) + return 0; + + /* Check for any active cpu in nd_pmu->arch_cpumask */ + target = cpumask_any(&nd_pmu->arch_cpumask); + + /* + * Incase we don't have any active cpu in nd_pmu->arch_cpumask, + * check in given cpu's numa node list. + */ + if (target >= nr_cpu_ids) { + nodeid = cpu_to_node(cpu); + cpumask = cpumask_of_node(nodeid); + target = cpumask_any_but(cpumask, cpu); + } + nd_pmu->cpu = target; + + /* Migrate nvdimm pmu events to the new target cpu if valid */ + if (target >= 0 && target < nr_cpu_ids) + perf_pmu_migrate_context(&nd_pmu->pmu, cpu, target); + + return 0; +} + +static int nvdimm_pmu_cpu_online(unsigned int cpu, struct hlist_node *node) +{ + struct nvdimm_pmu *nd_pmu; + + nd_pmu = hlist_entry_safe(node, struct nvdimm_pmu, node); + + if (nd_pmu->cpu >= nr_cpu_ids) + nd_pmu->cpu = cpu; + + return 0; +} + +static int create_cpumask_attr_group(struct nvdimm_pmu *nd_pmu) +{ + struct perf_pmu_events_attr *pmu_events_attr; + struct attribute **attrs_group; + struct attribute_group *nvdimm_pmu_cpumask_group; + + pmu_events_attr = kzalloc(sizeof(*pmu_events_attr), GFP_KERNEL); + if (!pmu_events_attr) + return -ENOMEM; + + attrs_group = kzalloc(2 * sizeof(struct attribute *), GFP_KERNEL); + if (!attrs_group) { + kfree(pmu_events_attr); + return -ENOMEM; + } + + /* Allocate memory for cpumask attribute group */ + nvdimm_pmu_cpumask_group = kzalloc(sizeof(*nvdimm_pmu_cpumask_group), GFP_KERNEL); + if (!nvdimm_pmu_cpumask_group) { + kfree(pmu_events_attr); + kfree(attrs_group); + return -ENOMEM; + } + + sysfs_attr_init(&pmu_events_attr->attr.attr); + pmu_events_attr->attr.attr.name = "cpumask"; + pmu_events_attr->attr.attr.mode = 0444; + pmu_events_attr->attr.show = nvdimm_pmu_cpumask_show; + attrs_group[0] = &pmu_events_attr->attr.attr; + attrs_group[1] = NULL; + + nvdimm_pmu_cpumask_group->attrs = attrs_group; + nd_pmu->pmu.attr_groups[NVDIMM_PMU_CPUMASK_ATTR] = nvdimm_pmu_cpumask_group; + return 0; +} + +static int nvdimm_pmu_cpu_hotplug_init(struct nvdimm_pmu *nd_pmu) +{ + int nodeid, rc; + const struct cpumask *cpumask; + + /* + * Incase of cpu hotplug feature, arch specific code + * can provide required cpumask which can be used + * to get designatd cpu for counter access. + * Check for any active cpu in nd_pmu->arch_cpumask. + */ + if (!cpumask_empty(&nd_pmu->arch_cpumask)) { + nd_pmu->cpu = cpumask_any(&nd_pmu->arch_cpumask); + } else { + /* pick active cpu from the cpumask of device numa node. */ + nodeid = dev_to_node(nd_pmu->dev); + cpumask = cpumask_of_node(nodeid); + nd_pmu->cpu = cpumask_any(cpumask); + } + + rc = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "perf/nvdimm:online", + nvdimm_pmu_cpu_online, nvdimm_pmu_cpu_offline); + + if (rc < 0) + return rc; + + nd_pmu->cpuhp_state = rc; + + /* Register the pmu instance for cpu hotplug */ + rc = cpuhp_state_add_instance_nocalls(nd_pmu->cpuhp_state, &nd_pmu->node); + if (rc) { + cpuhp_remove_multi_state(nd_pmu->cpuhp_state); + return rc; + } + + /* Create cpumask attribute group */ + rc = create_cpumask_attr_group(nd_pmu); + if (rc) { + cpuhp_state_remove_instance_nocalls(nd_pmu->cpuhp_state, &nd_pmu->node); + cpuhp_remove_multi_state(nd_pmu->cpuhp_state); + return rc; + } + + return 0; +} + +static void nvdimm_pmu_free_hotplug_memory(struct nvdimm_pmu *nd_pmu) +{ + cpuhp_state_remove_instance_nocalls(nd_pmu->cpuhp_state, &nd_pmu->node); + cpuhp_remove_multi_state(nd_pmu->cpuhp_state); + + if (nd_pmu->pmu.attr_groups[NVDIMM_PMU_CPUMASK_ATTR]) + kfree(nd_pmu->pmu.attr_groups[NVDIMM_PMU_CPUMASK_ATTR]->attrs); + kfree(nd_pmu->pmu.attr_groups[NVDIMM_PMU_CPUMASK_ATTR]); +} + +int register_nvdimm_pmu(struct nvdimm_pmu *nd_pmu, struct platform_device *pdev) +{ + int rc; + + if (!nd_pmu || !pdev) + return -EINVAL; + + /* event functions like add/del/read/event_init and pmu name should not be NULL */ + if (WARN_ON_ONCE(!(nd_pmu->pmu.event_init && nd_pmu->pmu.add && + nd_pmu->pmu.del && nd_pmu->pmu.read && nd_pmu->pmu.name))) + return -EINVAL; + + nd_pmu->pmu.attr_groups = kzalloc((NVDIMM_PMU_NULL_ATTR + 1) * + sizeof(struct attribute_group *), GFP_KERNEL); + if (!nd_pmu->pmu.attr_groups) + return -ENOMEM; + + /* + * Add platform_device->dev pointer to nvdimm_pmu to access + * device data in events functions. + */ + nd_pmu->dev = &pdev->dev; + + /* Fill attribute groups for the nvdimm pmu device */ + nd_pmu->pmu.attr_groups[NVDIMM_PMU_FORMAT_ATTR] = &nvdimm_pmu_format_group; + nd_pmu->pmu.attr_groups[NVDIMM_PMU_EVENT_ATTR] = &nvdimm_pmu_events_group; + nd_pmu->pmu.attr_groups[NVDIMM_PMU_NULL_ATTR] = NULL; + + /* Fill attribute group for cpumask */ + rc = nvdimm_pmu_cpu_hotplug_init(nd_pmu); + if (rc) { + pr_info("cpu hotplug feature failed for device: %s\n", nd_pmu->pmu.name); + kfree(nd_pmu->pmu.attr_groups); + return rc; + } + + rc = perf_pmu_register(&nd_pmu->pmu, nd_pmu->pmu.name, -1); + if (rc) { + kfree(nd_pmu->pmu.attr_groups); + nvdimm_pmu_free_hotplug_memory(nd_pmu); + return rc; + } + + pr_info("%s NVDIMM performance monitor support registered\n", + nd_pmu->pmu.name); + + return 0; +} +EXPORT_SYMBOL_GPL(register_nvdimm_pmu); + +void unregister_nvdimm_pmu(struct nvdimm_pmu *nd_pmu) +{ + perf_pmu_unregister(&nd_pmu->pmu); + nvdimm_pmu_free_hotplug_memory(nd_pmu); + kfree(nd_pmu); +} +EXPORT_SYMBOL_GPL(unregister_nvdimm_pmu); diff --git a/include/linux/nd.h b/include/linux/nd.h index ad186e828263..4813c7089e5c 100644 --- a/include/linux/nd.h +++ b/include/linux/nd.h @@ -9,6 +9,7 @@ #include #include #include +#include enum nvdimm_event { NVDIMM_REVALIDATE_POISON, @@ -24,6 +25,19 @@ enum nvdimm_claim_class { NVDIMM_CCLASS_UNKNOWN, }; +#define NVDIMM_EVENT_VAR(_id) event_attr_##_id +#define NVDIMM_EVENT_PTR(_id) (&event_attr_##_id.attr.attr) + +#define NVDIMM_EVENT_ATTR(_name, _id) \ + PMU_EVENT_ATTR(_name, NVDIMM_EVENT_VAR(_id), _id, \ + nvdimm_events_sysfs_show) + +/* Event attribute array index */ +#define NVDIMM_PMU_FORMAT_ATTR 0 +#define NVDIMM_PMU_EVENT_ATTR 1 +#define NVDIMM_PMU_CPUMASK_ATTR 2 +#define NVDIMM_PMU_NULL_ATTR 3 + /** * struct nvdimm_pmu - data structure for nvdimm perf driver * @pmu: pmu data structure for nvdimm performance stats. @@ -43,6 +57,16 @@ struct nvdimm_pmu { struct cpumask arch_cpumask; }; +extern ssize_t nvdimm_events_sysfs_show(struct device *dev, + struct device_attribute *attr, + char *page); + +int register_nvdimm_pmu(struct nvdimm_pmu *nvdimm, struct platform_device *pdev); +void unregister_nvdimm_pmu(struct nvdimm_pmu *nd_pmu); +void perf_pmu_migrate_context(struct pmu *pmu, int src_cpu, int dst_cpu); +int perf_pmu_register(struct pmu *pmu, const char *name, int type); +void perf_pmu_unregister(struct pmu *pmu); + struct nd_device_driver { struct device_driver drv; unsigned long type; -- cgit v1.2.3 From 84bd3690bf54a2f2f3b8449afa022aac1957ba17 Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Wed, 9 Mar 2022 19:49:37 -0800 Subject: nvdimm/namespace: Delete nd_namespace_blk Now that none of the configuration paths consider BLK namespaces, delete the BLK namespace data and supporting code. Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/164688417727.2879318.11691110761800109662.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams --- drivers/nvdimm/label.c | 340 ---------------------------------------- drivers/nvdimm/label.h | 3 - drivers/nvdimm/namespace_devs.c | 227 ++------------------------- drivers/nvdimm/nd-core.h | 3 - drivers/nvdimm/nd.h | 1 - include/linux/nd.h | 26 --- 6 files changed, 13 insertions(+), 587 deletions(-) (limited to 'include/linux') diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c index 5ec9a4023df9..8c972bcb2ac3 100644 --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -968,326 +968,6 @@ static int __pmem_label_update(struct nd_region *nd_region, return rc; } -static bool is_old_resource(struct resource *res, struct resource **list, int n) -{ - int i; - - if (res->flags & DPA_RESOURCE_ADJUSTED) - return false; - for (i = 0; i < n; i++) - if (res == list[i]) - return true; - return false; -} - -static struct resource *to_resource(struct nvdimm_drvdata *ndd, - struct nd_namespace_label *nd_label) -{ - struct resource *res; - - for_each_dpa_resource(ndd, res) { - if (res->start != nsl_get_dpa(ndd, nd_label)) - continue; - if (resource_size(res) != nsl_get_rawsize(ndd, nd_label)) - continue; - return res; - } - - return NULL; -} - -/* - * Use the presence of the type_guid as a flag to determine isetcookie - * usage and nlabel + position policy for blk-aperture namespaces. - */ -static void nsl_set_blk_isetcookie(struct nvdimm_drvdata *ndd, - struct nd_namespace_label *nd_label, - u64 isetcookie) -{ - if (efi_namespace_label_has(ndd, type_guid)) { - nsl_set_isetcookie(ndd, nd_label, isetcookie); - return; - } - nsl_set_isetcookie(ndd, nd_label, 0); /* N/A */ -} - -bool nsl_validate_blk_isetcookie(struct nvdimm_drvdata *ndd, - struct nd_namespace_label *nd_label, - u64 isetcookie) -{ - if (!efi_namespace_label_has(ndd, type_guid)) - return true; - - if (nsl_get_isetcookie(ndd, nd_label) != isetcookie) { - dev_dbg(ndd->dev, "expect cookie %#llx got %#llx\n", isetcookie, - nsl_get_isetcookie(ndd, nd_label)); - return false; - } - - return true; -} - -static void nsl_set_blk_nlabel(struct nvdimm_drvdata *ndd, - struct nd_namespace_label *nd_label, int nlabel, - bool first) -{ - if (!efi_namespace_label_has(ndd, type_guid)) { - nsl_set_nlabel(ndd, nd_label, 0); /* N/A */ - return; - } - nsl_set_nlabel(ndd, nd_label, first ? nlabel : 0xffff); -} - -static void nsl_set_blk_position(struct nvdimm_drvdata *ndd, - struct nd_namespace_label *nd_label, - bool first) -{ - if (!efi_namespace_label_has(ndd, type_guid)) { - nsl_set_position(ndd, nd_label, 0); - return; - } - nsl_set_position(ndd, nd_label, first ? 0 : 0xffff); -} - -/* - * 1/ Account all the labels that can be freed after this update - * 2/ Allocate and write the label to the staging (next) index - * 3/ Record the resources in the namespace device - */ -static int __blk_label_update(struct nd_region *nd_region, - struct nd_mapping *nd_mapping, struct nd_namespace_blk *nsblk, - int num_labels) -{ - int i, alloc, victims, nfree, old_num_resources, nlabel, rc = -ENXIO; - struct nd_interleave_set *nd_set = nd_region->nd_set; - struct nd_namespace_common *ndns = &nsblk->common; - struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); - struct nd_namespace_label *nd_label; - struct nd_label_ent *label_ent, *e; - struct nd_namespace_index *nsindex; - unsigned long *free, *victim_map = NULL; - struct resource *res, **old_res_list; - struct nd_label_id label_id; - int min_dpa_idx = 0; - LIST_HEAD(list); - u32 nslot, slot; - - if (!preamble_next(ndd, &nsindex, &free, &nslot)) - return -ENXIO; - - old_res_list = nsblk->res; - nfree = nd_label_nfree(ndd); - old_num_resources = nsblk->num_resources; - nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); - - /* - * We need to loop over the old resources a few times, which seems a - * bit inefficient, but we need to know that we have the label - * space before we start mutating the tracking structures. - * Otherwise the recovery method of last resort for userspace is - * disable and re-enable the parent region. - */ - alloc = 0; - for_each_dpa_resource(ndd, res) { - if (strcmp(res->name, label_id.id) != 0) - continue; - if (!is_old_resource(res, old_res_list, old_num_resources)) - alloc++; - } - - victims = 0; - if (old_num_resources) { - /* convert old local-label-map to dimm-slot victim-map */ - victim_map = bitmap_zalloc(nslot, GFP_KERNEL); - if (!victim_map) - return -ENOMEM; - - /* mark unused labels for garbage collection */ - for_each_clear_bit_le(slot, free, nslot) { - nd_label = to_label(ndd, slot); - if (!nsl_uuid_equal(ndd, nd_label, nsblk->uuid)) - continue; - res = to_resource(ndd, nd_label); - if (res && is_old_resource(res, old_res_list, - old_num_resources)) - continue; - slot = to_slot(ndd, nd_label); - set_bit(slot, victim_map); - victims++; - } - } - - /* don't allow updates that consume the last label */ - if (nfree - alloc < 0 || nfree - alloc + victims < 1) { - dev_info(&nsblk->common.dev, "insufficient label space\n"); - bitmap_free(victim_map); - return -ENOSPC; - } - /* from here on we need to abort on error */ - - - /* assign all resources to the namespace before writing the labels */ - nsblk->res = NULL; - nsblk->num_resources = 0; - for_each_dpa_resource(ndd, res) { - if (strcmp(res->name, label_id.id) != 0) - continue; - if (!nsblk_add_resource(nd_region, ndd, nsblk, res->start)) { - rc = -ENOMEM; - goto abort; - } - } - - /* release slots associated with any invalidated UUIDs */ - mutex_lock(&nd_mapping->lock); - list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) - if (test_and_clear_bit(ND_LABEL_REAP, &label_ent->flags)) { - reap_victim(nd_mapping, label_ent); - list_move(&label_ent->list, &list); - } - mutex_unlock(&nd_mapping->lock); - - /* - * Find the resource associated with the first label in the set - * per the v1.2 namespace specification. - */ - for (i = 0; i < nsblk->num_resources; i++) { - struct resource *min = nsblk->res[min_dpa_idx]; - - res = nsblk->res[i]; - if (res->start < min->start) - min_dpa_idx = i; - } - - for (i = 0; i < nsblk->num_resources; i++) { - size_t offset; - - res = nsblk->res[i]; - if (is_old_resource(res, old_res_list, old_num_resources)) - continue; /* carry-over */ - slot = nd_label_alloc_slot(ndd); - if (slot == UINT_MAX) { - rc = -ENXIO; - goto abort; - } - dev_dbg(ndd->dev, "allocated: %d\n", slot); - - nd_label = to_label(ndd, slot); - memset(nd_label, 0, sizeof_namespace_label(ndd)); - nsl_set_uuid(ndd, nd_label, nsblk->uuid); - nsl_set_name(ndd, nd_label, nsblk->alt_name); - nsl_set_flags(ndd, nd_label, NSLABEL_FLAG_LOCAL); - - nsl_set_blk_nlabel(ndd, nd_label, nsblk->num_resources, - i == min_dpa_idx); - nsl_set_blk_position(ndd, nd_label, i == min_dpa_idx); - nsl_set_blk_isetcookie(ndd, nd_label, nd_set->cookie2); - - nsl_set_dpa(ndd, nd_label, res->start); - nsl_set_rawsize(ndd, nd_label, resource_size(res)); - nsl_set_lbasize(ndd, nd_label, nsblk->lbasize); - nsl_set_slot(ndd, nd_label, slot); - nsl_set_type_guid(ndd, nd_label, &nd_set->type_guid); - nsl_set_claim_class(ndd, nd_label, ndns->claim_class); - nsl_calculate_checksum(ndd, nd_label); - - /* update label */ - offset = nd_label_offset(ndd, nd_label); - rc = nvdimm_set_config_data(ndd, offset, nd_label, - sizeof_namespace_label(ndd)); - if (rc < 0) - goto abort; - } - - /* free up now unused slots in the new index */ - for_each_set_bit(slot, victim_map, victim_map ? nslot : 0) { - dev_dbg(ndd->dev, "free: %d\n", slot); - nd_label_free_slot(ndd, slot); - } - - /* update index */ - rc = nd_label_write_index(ndd, ndd->ns_next, - nd_inc_seq(__le32_to_cpu(nsindex->seq)), 0); - if (rc) - goto abort; - - /* - * Now that the on-dimm labels are up to date, fix up the tracking - * entries in nd_mapping->labels - */ - nlabel = 0; - mutex_lock(&nd_mapping->lock); - list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { - nd_label = label_ent->label; - if (!nd_label) - continue; - nlabel++; - if (!nsl_uuid_equal(ndd, nd_label, nsblk->uuid)) - continue; - nlabel--; - list_move(&label_ent->list, &list); - label_ent->label = NULL; - } - list_splice_tail_init(&list, &nd_mapping->labels); - mutex_unlock(&nd_mapping->lock); - - if (nlabel + nsblk->num_resources > num_labels) { - /* - * Bug, we can't end up with more resources than - * available labels - */ - WARN_ON_ONCE(1); - rc = -ENXIO; - goto out; - } - - mutex_lock(&nd_mapping->lock); - label_ent = list_first_entry_or_null(&nd_mapping->labels, - typeof(*label_ent), list); - if (!label_ent) { - WARN_ON(1); - mutex_unlock(&nd_mapping->lock); - rc = -ENXIO; - goto out; - } - for_each_clear_bit_le(slot, free, nslot) { - nd_label = to_label(ndd, slot); - if (!nsl_uuid_equal(ndd, nd_label, nsblk->uuid)) - continue; - res = to_resource(ndd, nd_label); - res->flags &= ~DPA_RESOURCE_ADJUSTED; - dev_vdbg(&nsblk->common.dev, "assign label slot: %d\n", slot); - list_for_each_entry_from(label_ent, &nd_mapping->labels, list) { - if (label_ent->label) - continue; - label_ent->label = nd_label; - nd_label = NULL; - break; - } - if (nd_label) - dev_WARN(&nsblk->common.dev, - "failed to track label slot%d\n", slot); - } - mutex_unlock(&nd_mapping->lock); - - out: - kfree(old_res_list); - bitmap_free(victim_map); - return rc; - - abort: - /* - * 1/ repair the allocated label bitmap in the index - * 2/ restore the resource list - */ - nd_label_copy(ndd, nsindex, to_current_namespace_index(ndd)); - kfree(nsblk->res); - nsblk->res = old_res_list; - nsblk->num_resources = old_num_resources; - old_res_list = NULL; - goto out; -} - static int init_labels(struct nd_mapping *nd_mapping, int num_labels) { int i, old_num_labels = 0; @@ -1425,26 +1105,6 @@ int nd_pmem_namespace_label_update(struct nd_region *nd_region, return 0; } -int nd_blk_namespace_label_update(struct nd_region *nd_region, - struct nd_namespace_blk *nsblk, resource_size_t size) -{ - struct nd_mapping *nd_mapping = &nd_region->mapping[0]; - struct resource *res; - int count = 0; - - if (size == 0) - return del_labels(nd_mapping, nsblk->uuid); - - for_each_dpa_resource(to_ndd(nd_mapping), res) - count++; - - count = init_labels(nd_mapping, count); - if (count < 0) - return count; - - return __blk_label_update(nd_region, nd_mapping, nsblk, count); -} - int __init nd_label_init(void) { WARN_ON(guid_parse(NVDIMM_BTT_GUID, &nvdimm_btt_guid)); diff --git a/drivers/nvdimm/label.h b/drivers/nvdimm/label.h index 8ee248fc214f..198ef1df298b 100644 --- a/drivers/nvdimm/label.h +++ b/drivers/nvdimm/label.h @@ -221,9 +221,6 @@ bool nd_label_free_slot(struct nvdimm_drvdata *ndd, u32 slot); u32 nd_label_nfree(struct nvdimm_drvdata *ndd); struct nd_region; struct nd_namespace_pmem; -struct nd_namespace_blk; int nd_pmem_namespace_label_update(struct nd_region *nd_region, struct nd_namespace_pmem *nspm, resource_size_t size); -int nd_blk_namespace_label_update(struct nd_region *nd_region, - struct nd_namespace_blk *nsblk, resource_size_t size); #endif /* __LABEL_H__ */ diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index 5c76547c9b84..d1c190b02657 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -32,19 +32,6 @@ static void namespace_pmem_release(struct device *dev) kfree(nspm); } -static void namespace_blk_release(struct device *dev) -{ - struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); - struct nd_region *nd_region = to_nd_region(dev->parent); - - if (nsblk->id >= 0) - ida_simple_remove(&nd_region->ns_ida, nsblk->id); - kfree(nsblk->alt_name); - kfree(nsblk->uuid); - kfree(nsblk->res); - kfree(nsblk); -} - static bool is_namespace_pmem(const struct device *dev); static bool is_namespace_io(const struct device *dev); @@ -245,65 +232,6 @@ out: return rc; } -static bool __nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) -{ - struct nd_region *nd_region = to_nd_region(nsblk->common.dev.parent); - struct nd_mapping *nd_mapping = &nd_region->mapping[0]; - struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); - struct nd_label_id label_id; - struct resource *res; - int count, i; - - if (!nsblk->uuid || !nsblk->lbasize || !ndd) - return false; - - count = 0; - nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); - for_each_dpa_resource(ndd, res) { - if (strcmp(res->name, label_id.id) != 0) - continue; - /* - * Resources with unacknowledged adjustments indicate a - * failure to update labels - */ - if (res->flags & DPA_RESOURCE_ADJUSTED) - return false; - count++; - } - - /* These values match after a successful label update */ - if (count != nsblk->num_resources) - return false; - - for (i = 0; i < nsblk->num_resources; i++) { - struct resource *found = NULL; - - for_each_dpa_resource(ndd, res) - if (res == nsblk->res[i]) { - found = res; - break; - } - /* stale resource */ - if (!found) - return false; - } - - return true; -} - -resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk) -{ - resource_size_t size; - - nvdimm_bus_lock(&nsblk->common.dev); - size = __nd_namespace_blk_validate(nsblk); - nvdimm_bus_unlock(&nsblk->common.dev); - - return size; -} -EXPORT_SYMBOL(nd_namespace_blk_validate); - - static int nd_namespace_label_update(struct nd_region *nd_region, struct device *dev) { @@ -1579,12 +1507,6 @@ static const struct device_type namespace_pmem_device_type = { .groups = nd_namespace_attribute_groups, }; -static const struct device_type namespace_blk_device_type = { - .name = "nd_namespace_blk", - .release = namespace_blk_release, - .groups = nd_namespace_attribute_groups, -}; - static bool is_namespace_pmem(const struct device *dev) { return dev ? dev->type == &namespace_pmem_device_type : false; @@ -1964,54 +1886,6 @@ static struct device *create_namespace_pmem(struct nd_region *nd_region, return ERR_PTR(rc); } -struct resource *nsblk_add_resource(struct nd_region *nd_region, - struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk, - resource_size_t start) -{ - struct nd_label_id label_id; - struct resource *res; - - nd_label_gen_id(&label_id, nsblk->uuid, NSLABEL_FLAG_LOCAL); - res = krealloc(nsblk->res, - sizeof(void *) * (nsblk->num_resources + 1), - GFP_KERNEL); - if (!res) - return NULL; - nsblk->res = (struct resource **) res; - for_each_dpa_resource(ndd, res) - if (strcmp(res->name, label_id.id) == 0 - && res->start == start) { - nsblk->res[nsblk->num_resources++] = res; - return res; - } - return NULL; -} - -static struct device *nd_namespace_blk_create(struct nd_region *nd_region) -{ - struct nd_namespace_blk *nsblk; - struct device *dev; - - if (!is_nd_blk(&nd_region->dev)) - return NULL; - - nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); - if (!nsblk) - return NULL; - - dev = &nsblk->common.dev; - dev->type = &namespace_blk_device_type; - nsblk->id = ida_simple_get(&nd_region->ns_ida, 0, 0, GFP_KERNEL); - if (nsblk->id < 0) { - kfree(nsblk); - return NULL; - } - dev_set_name(dev, "namespace%d.%d", nd_region->id, nsblk->id); - dev->parent = &nd_region->dev; - - return &nsblk->common.dev; -} - static struct device *nd_namespace_pmem_create(struct nd_region *nd_region) { struct nd_namespace_pmem *nspm; @@ -2050,10 +1924,7 @@ void nd_region_create_ns_seed(struct nd_region *nd_region) if (nd_region_to_nstype(nd_region) == ND_DEVICE_NAMESPACE_IO) return; - if (is_nd_blk(&nd_region->dev)) - nd_region->ns_seed = nd_namespace_blk_create(nd_region); - else - nd_region->ns_seed = nd_namespace_pmem_create(nd_region); + nd_region->ns_seed = nd_namespace_pmem_create(nd_region); /* * Seed creation failures are not fatal, provisioning is simply @@ -2128,54 +1999,6 @@ static int add_namespace_resource(struct nd_region *nd_region, return i; } -static struct device *create_namespace_blk(struct nd_region *nd_region, - struct nd_namespace_label *nd_label, int count) -{ - - struct nd_mapping *nd_mapping = &nd_region->mapping[0]; - struct nd_interleave_set *nd_set = nd_region->nd_set; - struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); - struct nd_namespace_blk *nsblk; - char name[NSLABEL_NAME_LEN]; - struct device *dev = NULL; - struct resource *res; - uuid_t uuid; - - if (!nsl_validate_type_guid(ndd, nd_label, &nd_set->type_guid)) - return ERR_PTR(-EAGAIN); - if (!nsl_validate_blk_isetcookie(ndd, nd_label, nd_set->cookie2)) - return ERR_PTR(-EAGAIN); - - nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); - if (!nsblk) - return ERR_PTR(-ENOMEM); - dev = &nsblk->common.dev; - dev->type = &namespace_blk_device_type; - dev->parent = &nd_region->dev; - nsblk->id = -1; - nsblk->lbasize = nsl_get_lbasize(ndd, nd_label); - nsl_get_uuid(ndd, nd_label, &uuid); - nsblk->uuid = kmemdup(&uuid, sizeof(uuid_t), GFP_KERNEL); - nsblk->common.claim_class = nsl_get_claim_class(ndd, nd_label); - if (!nsblk->uuid) - goto blk_err; - nsl_get_name(ndd, nd_label, name); - if (name[0]) { - nsblk->alt_name = kmemdup(name, NSLABEL_NAME_LEN, GFP_KERNEL); - if (!nsblk->alt_name) - goto blk_err; - } - res = nsblk_add_resource(nd_region, ndd, nsblk, - nsl_get_dpa(ndd, nd_label)); - if (!res) - goto blk_err; - nd_dbg_dpa(nd_region, ndd, res, "%d: assign\n", count); - return dev; - blk_err: - namespace_blk_release(dev); - return ERR_PTR(-ENXIO); -} - static int cmp_dpa(const void *a, const void *b) { const struct device *dev_a = *(const struct device **) a; @@ -2233,12 +2056,7 @@ static struct device **scan_labels(struct nd_region *nd_region) kfree(devs); devs = __devs; - if (is_nd_blk(&nd_region->dev)) - dev = create_namespace_blk(nd_region, nd_label, count); - else - dev = create_namespace_pmem(nd_region, nd_mapping, - nd_label); - + dev = create_namespace_pmem(nd_region, nd_mapping, nd_label); if (IS_ERR(dev)) { switch (PTR_ERR(dev)) { case -EAGAIN: @@ -2260,30 +2078,21 @@ static struct device **scan_labels(struct nd_region *nd_region) ? "blk" : "pmem", count == 1 ? "" : "s"); if (count == 0) { + struct nd_namespace_pmem *nspm; + /* Publish a zero-sized namespace for userspace to configure. */ nd_mapping_free_labels(nd_mapping); devs = kcalloc(2, sizeof(dev), GFP_KERNEL); if (!devs) goto err; - if (is_nd_blk(&nd_region->dev)) { - struct nd_namespace_blk *nsblk; - - nsblk = kzalloc(sizeof(*nsblk), GFP_KERNEL); - if (!nsblk) - goto err; - dev = &nsblk->common.dev; - dev->type = &namespace_blk_device_type; - } else { - struct nd_namespace_pmem *nspm; - nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); - if (!nspm) - goto err; - dev = &nspm->nsio.common.dev; - dev->type = &namespace_pmem_device_type; - nd_namespace_pmem_set_resource(nd_region, nspm, 0); - } + nspm = kzalloc(sizeof(*nspm), GFP_KERNEL); + if (!nspm) + goto err; + dev = &nspm->nsio.common.dev; + dev->type = &namespace_pmem_device_type; + nd_namespace_pmem_set_resource(nd_region, nspm, 0); dev->parent = &nd_region->dev; devs[count++] = dev; } else if (is_memory(&nd_region->dev)) { @@ -2318,10 +2127,7 @@ static struct device **scan_labels(struct nd_region *nd_region) err: if (devs) { for (i = 0; devs[i]; i++) - if (is_nd_blk(&nd_region->dev)) - namespace_blk_release(devs[i]); - else - namespace_pmem_release(devs[i]); + namespace_pmem_release(devs[i]); kfree(devs); } return NULL; @@ -2484,19 +2290,12 @@ int nd_region_register_namespaces(struct nd_region *nd_region, int *err) struct device *dev = devs[i]; int id; - if (type == ND_DEVICE_NAMESPACE_BLK) { - struct nd_namespace_blk *nsblk; - - nsblk = to_nd_namespace_blk(dev); - id = ida_simple_get(&nd_region->ns_ida, 0, 0, - GFP_KERNEL); - nsblk->id = id; - } else if (type == ND_DEVICE_NAMESPACE_PMEM) { + if (type == ND_DEVICE_NAMESPACE_PMEM) { struct nd_namespace_pmem *nspm; nspm = to_nd_namespace_pmem(dev); id = ida_simple_get(&nd_region->ns_ida, 0, 0, - GFP_KERNEL); + GFP_KERNEL); nspm->id = id; } else id = i; diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h index a11850dd475d..e4af0719cf33 100644 --- a/drivers/nvdimm/nd-core.h +++ b/drivers/nvdimm/nd-core.h @@ -150,9 +150,6 @@ int nd_region_conflict(struct nd_region *nd_region, resource_size_t start, resource_size_t nvdimm_allocated_dpa(struct nvdimm_drvdata *ndd, struct nd_label_id *label_id); int alias_dpa_busy(struct device *dev, void *data); -struct resource *nsblk_add_resource(struct nd_region *nd_region, - struct nvdimm_drvdata *ndd, struct nd_namespace_blk *nsblk, - resource_size_t start); int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd); void get_ndd(struct nvdimm_drvdata *ndd); resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns); diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index 6f8ce114032d..8391bf2729bc 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -687,7 +687,6 @@ static inline bool is_bad_pmem(struct badblocks *bb, sector_t sector, return false; } -resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk); const uuid_t *nd_dev_to_uuid(struct device *dev); bool pmem_should_map_pages(struct device *dev); #endif /* __ND_H__ */ diff --git a/include/linux/nd.h b/include/linux/nd.h index 4813c7089e5c..7b2ccbdc1cbc 100644 --- a/include/linux/nd.h +++ b/include/linux/nd.h @@ -136,27 +136,6 @@ struct nd_namespace_pmem { int id; }; -/** - * struct nd_namespace_blk - namespace for dimm-bounded persistent memory - * @alt_name: namespace name supplied in the dimm label - * @uuid: namespace name supplied in the dimm label - * @id: ida allocated id - * @lbasize: blk namespaces have a native sector size when btt not present - * @size: sum of all the resource ranges allocated to this namespace - * @num_resources: number of dpa extents to claim - * @res: discontiguous dpa extents for given dimm - */ -struct nd_namespace_blk { - struct nd_namespace_common common; - char *alt_name; - uuid_t *uuid; - int id; - unsigned long lbasize; - resource_size_t size; - int num_resources; - struct resource **res; -}; - static inline struct nd_namespace_io *to_nd_namespace_io(const struct device *dev) { return container_of(dev, struct nd_namespace_io, common.dev); @@ -169,11 +148,6 @@ static inline struct nd_namespace_pmem *to_nd_namespace_pmem(const struct device return container_of(nsio, struct nd_namespace_pmem, nsio); } -static inline struct nd_namespace_blk *to_nd_namespace_blk(const struct device *dev) -{ - return container_of(dev, struct nd_namespace_blk, common.dev); -} - /** * nvdimm_read_bytes() - synchronously read bytes from an nvdimm namespace * @ndns: device to read -- cgit v1.2.3 From 3b6c6c039707f6bb7c64af2aa82a437fabb93aee Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Wed, 9 Mar 2022 19:49:48 -0800 Subject: nvdimm/region: Delete nd_blk_region infrastructure Now that the nd_namespace_blk infrastructure is removed, delete all the region machinery to coordinate provisioning aliased capacity between PMEM and BLK. Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/164688418803.2879318.1302315202397235855.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams --- drivers/acpi/nfit/core.c | 11 +- drivers/nvdimm/bus.c | 2 - drivers/nvdimm/dimm_devs.c | 204 +++---------------------------------- drivers/nvdimm/label.c | 6 +- drivers/nvdimm/label.h | 2 +- drivers/nvdimm/namespace_devs.c | 127 +++-------------------- drivers/nvdimm/nd-core.h | 24 +---- drivers/nvdimm/nd.h | 12 --- drivers/nvdimm/region.c | 31 ++---- drivers/nvdimm/region_devs.c | 158 ++++------------------------ include/linux/libnvdimm.h | 24 ----- include/uapi/linux/ndctl.h | 2 - tools/testing/nvdimm/test/ndtest.c | 67 +----------- 13 files changed, 66 insertions(+), 604 deletions(-) (limited to 'include/linux') diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index bea6a219fddd..fe61f617a943 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -2036,10 +2036,6 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc) cmd_mask |= nfit_mem->dsm_mask & NVDIMM_STANDARD_CMDMASK; } - /* Quirk to ignore LOCAL for labels on HYPERV DIMMs */ - if (nfit_mem->family == NVDIMM_FAMILY_HYPERV) - set_bit(NDD_NOBLK, &flags); - if (test_bit(NFIT_MEM_LSR, &nfit_mem->flags)) { set_bit(ND_CMD_GET_CONFIG_SIZE, &cmd_mask); set_bit(ND_CMD_GET_CONFIG_DATA, &cmd_mask); @@ -2602,8 +2598,7 @@ static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc, { static struct nd_mapping_desc mappings[ND_MAX_MAPPINGS]; struct acpi_nfit_system_address *spa = nfit_spa->spa; - struct nd_blk_region_desc ndbr_desc; - struct nd_region_desc *ndr_desc; + struct nd_region_desc *ndr_desc, _ndr_desc; struct nfit_memdev *nfit_memdev; struct nvdimm_bus *nvdimm_bus; struct resource res; @@ -2619,10 +2614,10 @@ static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc, memset(&res, 0, sizeof(res)); memset(&mappings, 0, sizeof(mappings)); - memset(&ndbr_desc, 0, sizeof(ndbr_desc)); + memset(&_ndr_desc, 0, sizeof(_ndr_desc)); res.start = spa->address; res.end = res.start + spa->length - 1; - ndr_desc = &ndbr_desc.ndr_desc; + ndr_desc = &_ndr_desc; ndr_desc->res = &res; ndr_desc->provider_data = nfit_spa; ndr_desc->attr_groups = acpi_nfit_region_attribute_groups; diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c index 9dc7f3edd42b..a4b5f637e599 100644 --- a/drivers/nvdimm/bus.c +++ b/drivers/nvdimm/bus.c @@ -35,8 +35,6 @@ static int to_nd_device_type(struct device *dev) return ND_DEVICE_DIMM; else if (is_memory(dev)) return ND_DEVICE_REGION_PMEM; - else if (is_nd_blk(dev)) - return ND_DEVICE_REGION_BLK; else if (is_nd_dax(dev)) return ND_DEVICE_DAX_PMEM; else if (is_nd_region(dev->parent)) diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c index dc7449a40003..ee507eed42b5 100644 --- a/drivers/nvdimm/dimm_devs.c +++ b/drivers/nvdimm/dimm_devs.c @@ -18,10 +18,6 @@ static DEFINE_IDA(dimm_ida); -static bool noblk; -module_param(noblk, bool, 0444); -MODULE_PARM_DESC(noblk, "force disable BLK / local alias support"); - /* * Retrieve bus and dimm handle and return if this bus supports * get_config_data commands @@ -211,22 +207,6 @@ struct nvdimm *to_nvdimm(struct device *dev) } EXPORT_SYMBOL_GPL(to_nvdimm); -struct nvdimm *nd_blk_region_to_dimm(struct nd_blk_region *ndbr) -{ - struct nd_region *nd_region = &ndbr->nd_region; - struct nd_mapping *nd_mapping = &nd_region->mapping[0]; - - return nd_mapping->nvdimm; -} -EXPORT_SYMBOL_GPL(nd_blk_region_to_dimm); - -unsigned long nd_blk_memremap_flags(struct nd_blk_region *ndbr) -{ - /* pmem mapping properties are private to libnvdimm */ - return ARCH_MEMREMAP_PMEM; -} -EXPORT_SYMBOL_GPL(nd_blk_memremap_flags); - struct nvdimm_drvdata *to_ndd(struct nd_mapping *nd_mapping) { struct nvdimm *nvdimm = nd_mapping->nvdimm; @@ -312,8 +292,7 @@ static ssize_t flags_show(struct device *dev, { struct nvdimm *nvdimm = to_nvdimm(dev); - return sprintf(buf, "%s%s%s\n", - test_bit(NDD_ALIASING, &nvdimm->flags) ? "alias " : "", + return sprintf(buf, "%s%s\n", test_bit(NDD_LABELING, &nvdimm->flags) ? "label " : "", test_bit(NDD_LOCKED, &nvdimm->flags) ? "lock " : ""); } @@ -612,8 +591,6 @@ struct nvdimm *__nvdimm_create(struct nvdimm_bus *nvdimm_bus, nvdimm->dimm_id = dimm_id; nvdimm->provider_data = provider_data; - if (noblk) - flags |= 1 << NDD_NOBLK; nvdimm->flags = flags; nvdimm->cmd_mask = cmd_mask; nvdimm->num_flush = num_flush; @@ -726,133 +703,6 @@ static unsigned long dpa_align(struct nd_region *nd_region) return nd_region->align / nd_region->ndr_mappings; } -int alias_dpa_busy(struct device *dev, void *data) -{ - resource_size_t map_end, blk_start, new; - struct blk_alloc_info *info = data; - struct nd_mapping *nd_mapping; - struct nd_region *nd_region; - struct nvdimm_drvdata *ndd; - struct resource *res; - unsigned long align; - int i; - - if (!is_memory(dev)) - return 0; - - nd_region = to_nd_region(dev); - for (i = 0; i < nd_region->ndr_mappings; i++) { - nd_mapping = &nd_region->mapping[i]; - if (nd_mapping->nvdimm == info->nd_mapping->nvdimm) - break; - } - - if (i >= nd_region->ndr_mappings) - return 0; - - ndd = to_ndd(nd_mapping); - map_end = nd_mapping->start + nd_mapping->size - 1; - blk_start = nd_mapping->start; - - /* - * In the allocation case ->res is set to free space that we are - * looking to validate against PMEM aliasing collision rules - * (i.e. BLK is allocated after all aliased PMEM). - */ - if (info->res) { - if (info->res->start >= nd_mapping->start - && info->res->start < map_end) - /* pass */; - else - return 0; - } - - retry: - /* - * Find the free dpa from the end of the last pmem allocation to - * the end of the interleave-set mapping. - */ - align = dpa_align(nd_region); - if (!align) - return 0; - - for_each_dpa_resource(ndd, res) { - resource_size_t start, end; - - if (strncmp(res->name, "pmem", 4) != 0) - continue; - - start = ALIGN_DOWN(res->start, align); - end = ALIGN(res->end + 1, align) - 1; - if ((start >= blk_start && start < map_end) - || (end >= blk_start && end <= map_end)) { - new = max(blk_start, min(map_end, end) + 1); - if (new != blk_start) { - blk_start = new; - goto retry; - } - } - } - - /* update the free space range with the probed blk_start */ - if (info->res && blk_start > info->res->start) { - info->res->start = max(info->res->start, blk_start); - if (info->res->start > info->res->end) - info->res->end = info->res->start - 1; - return 1; - } - - info->available -= blk_start - nd_mapping->start; - - return 0; -} - -/** - * nd_blk_available_dpa - account the unused dpa of BLK region - * @nd_mapping: container of dpa-resource-root + labels - * - * Unlike PMEM, BLK namespaces can occupy discontiguous DPA ranges, but - * we arrange for them to never start at an lower dpa than the last - * PMEM allocation in an aliased region. - */ -resource_size_t nd_blk_available_dpa(struct nd_region *nd_region) -{ - struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); - struct nd_mapping *nd_mapping = &nd_region->mapping[0]; - struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); - struct blk_alloc_info info = { - .nd_mapping = nd_mapping, - .available = nd_mapping->size, - .res = NULL, - }; - struct resource *res; - unsigned long align; - - if (!ndd) - return 0; - - device_for_each_child(&nvdimm_bus->dev, &info, alias_dpa_busy); - - /* now account for busy blk allocations in unaliased dpa */ - align = dpa_align(nd_region); - if (!align) - return 0; - for_each_dpa_resource(ndd, res) { - resource_size_t start, end, size; - - if (strncmp(res->name, "blk", 3) != 0) - continue; - start = ALIGN_DOWN(res->start, align); - end = ALIGN(res->end + 1, align) - 1; - size = end - start + 1; - if (size >= info.available) - return 0; - info.available -= size; - } - - return info.available; -} - /** * nd_pmem_max_contiguous_dpa - For the given dimm+region, return the max * contiguous unallocated dpa range. @@ -900,24 +750,16 @@ resource_size_t nd_pmem_max_contiguous_dpa(struct nd_region *nd_region, * nd_pmem_available_dpa - for the given dimm+region account unallocated dpa * @nd_mapping: container of dpa-resource-root + labels * @nd_region: constrain available space check to this reference region - * @overlap: calculate available space assuming this level of overlap * * Validate that a PMEM label, if present, aligns with the start of an - * interleave set and truncate the available size at the lowest BLK - * overlap point. - * - * The expectation is that this routine is called multiple times as it - * probes for the largest BLK encroachment for any single member DIMM of - * the interleave set. Once that value is determined the PMEM-limit for - * the set can be established. + * interleave set. */ resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region, - struct nd_mapping *nd_mapping, resource_size_t *overlap) + struct nd_mapping *nd_mapping) { - resource_size_t map_start, map_end, busy = 0, available, blk_start; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); + resource_size_t map_start, map_end, busy = 0; struct resource *res; - const char *reason; unsigned long align; if (!ndd) @@ -929,46 +771,28 @@ resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region, map_start = nd_mapping->start; map_end = map_start + nd_mapping->size - 1; - blk_start = max(map_start, map_end + 1 - *overlap); for_each_dpa_resource(ndd, res) { resource_size_t start, end; start = ALIGN_DOWN(res->start, align); end = ALIGN(res->end + 1, align) - 1; if (start >= map_start && start < map_end) { - if (strncmp(res->name, "blk", 3) == 0) - blk_start = min(blk_start, - max(map_start, start)); - else if (end > map_end) { - reason = "misaligned to iset"; - goto err; - } else - busy += end - start + 1; + if (end > map_end) { + nd_dbg_dpa(nd_region, ndd, res, + "misaligned to iset\n"); + return 0; + } + busy += end - start + 1; } else if (end >= map_start && end <= map_end) { - if (strncmp(res->name, "blk", 3) == 0) { - /* - * If a BLK allocation overlaps the start of - * PMEM the entire interleave set may now only - * be used for BLK. - */ - blk_start = map_start; - } else - busy += end - start + 1; + busy += end - start + 1; } else if (map_start > start && map_start < end) { /* total eclipse of the mapping */ busy += nd_mapping->size; - blk_start = map_start; } } - *overlap = map_end + 1 - blk_start; - available = blk_start - map_start; - if (busy < available) - return ALIGN_DOWN(available - busy, align); - return 0; - - err: - nd_dbg_dpa(nd_region, ndd, res, "%s\n", reason); + if (busy < nd_mapping->size) + return ALIGN_DOWN(nd_mapping->size - busy, align); return 0; } @@ -999,7 +823,7 @@ struct resource *nvdimm_allocate_dpa(struct nvdimm_drvdata *ndd, /** * nvdimm_allocated_dpa - sum up the dpa currently allocated to this label_id * @nvdimm: container of dpa-resource-root + labels - * @label_id: dpa resource name of the form {pmem|blk}- + * @label_id: dpa resource name of the form pmem- */ resource_size_t nvdimm_allocated_dpa(struct nvdimm_drvdata *ndd, struct nd_label_id *label_id) diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c index 8c972bcb2ac3..082253a3a956 100644 --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -334,8 +334,7 @@ char *nd_label_gen_id(struct nd_label_id *label_id, const uuid_t *uuid, { if (!label_id || !uuid) return NULL; - snprintf(label_id->id, ND_LABEL_ID_SIZE, "%s-%pUb", - flags & NSLABEL_FLAG_LOCAL ? "blk" : "pmem", uuid); + snprintf(label_id->id, ND_LABEL_ID_SIZE, "pmem-%pUb", uuid); return label_id->id; } @@ -406,7 +405,6 @@ int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd) return 0; /* no label, nothing to reserve */ for_each_clear_bit_le(slot, free, nslot) { - struct nvdimm *nvdimm = to_nvdimm(ndd->dev); struct nd_namespace_label *nd_label; struct nd_region *nd_region = NULL; struct nd_label_id label_id; @@ -421,8 +419,6 @@ int nd_label_reserve_dpa(struct nvdimm_drvdata *ndd) nsl_get_uuid(ndd, nd_label, &label_uuid); flags = nsl_get_flags(ndd, nd_label); - if (test_bit(NDD_NOBLK, &nvdimm->flags)) - flags &= ~NSLABEL_FLAG_LOCAL; nd_label_gen_id(&label_id, &label_uuid, flags); res = nvdimm_allocate_dpa(ndd, &label_id, nsl_get_dpa(ndd, nd_label), diff --git a/drivers/nvdimm/label.h b/drivers/nvdimm/label.h index 198ef1df298b..0650fb4b9821 100644 --- a/drivers/nvdimm/label.h +++ b/drivers/nvdimm/label.h @@ -193,7 +193,7 @@ struct nd_namespace_label { /** * struct nd_label_id - identifier string for dpa allocation - * @id: "{blk|pmem}-" + * @id: "pmem-" */ struct nd_label_id { char id[ND_LABEL_ID_SIZE]; diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index d1c190b02657..62b83b2e26e3 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -297,13 +297,11 @@ static int scan_free(struct nd_region *nd_region, struct nd_mapping *nd_mapping, struct nd_label_id *label_id, resource_size_t n) { - bool is_blk = strncmp(label_id->id, "blk", 3) == 0; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); int rc = 0; while (n) { struct resource *res, *last; - resource_size_t new_start; last = NULL; for_each_dpa_resource(ndd, res) @@ -321,16 +319,7 @@ static int scan_free(struct nd_region *nd_region, continue; } - /* - * Keep BLK allocations relegated to high DPA as much as - * possible - */ - if (is_blk) - new_start = res->start + n; - else - new_start = res->start; - - rc = adjust_resource(res, new_start, resource_size(res) - n); + rc = adjust_resource(res, res->start, resource_size(res) - n); if (rc == 0) res->flags |= DPA_RESOURCE_ADJUSTED; nd_dbg_dpa(nd_region, ndd, res, "shrink %d\n", rc); @@ -372,20 +361,12 @@ static resource_size_t init_dpa_allocation(struct nd_label_id *label_id, struct nd_region *nd_region, struct nd_mapping *nd_mapping, resource_size_t n) { - bool is_blk = strncmp(label_id->id, "blk", 3) == 0; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); - resource_size_t first_dpa; struct resource *res; int rc = 0; - /* allocate blk from highest dpa first */ - if (is_blk) - first_dpa = nd_mapping->start + nd_mapping->size - n; - else - first_dpa = nd_mapping->start; - /* first resource allocation for this label-id or dimm */ - res = nvdimm_allocate_dpa(ndd, label_id, first_dpa, n); + res = nvdimm_allocate_dpa(ndd, label_id, nd_mapping->start, n); if (!res) rc = -EBUSY; @@ -416,7 +397,6 @@ static void space_valid(struct nd_region *nd_region, struct nvdimm_drvdata *ndd, resource_size_t n, struct resource *valid) { bool is_reserve = strcmp(label_id->id, "pmem-reserve") == 0; - bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; unsigned long align; align = nd_region->align / nd_region->ndr_mappings; @@ -429,21 +409,6 @@ static void space_valid(struct nd_region *nd_region, struct nvdimm_drvdata *ndd, if (is_reserve) return; - if (!is_pmem) { - struct nd_mapping *nd_mapping = &nd_region->mapping[0]; - struct nvdimm_bus *nvdimm_bus; - struct blk_alloc_info info = { - .nd_mapping = nd_mapping, - .available = nd_mapping->size, - .res = valid, - }; - - WARN_ON(!is_nd_blk(&nd_region->dev)); - nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); - device_for_each_child(&nvdimm_bus->dev, &info, alias_dpa_busy); - return; - } - /* allocation needs to be contiguous, so this is all or nothing */ if (resource_size(valid) < n) goto invalid; @@ -471,7 +436,6 @@ static resource_size_t scan_allocate(struct nd_region *nd_region, resource_size_t n) { resource_size_t mapping_end = nd_mapping->start + nd_mapping->size - 1; - bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); struct resource *res, *exist = NULL, valid; const resource_size_t to_allocate = n; @@ -569,10 +533,6 @@ static resource_size_t scan_allocate(struct nd_region *nd_region, } if (strcmp(action, "allocate") == 0) { - /* BLK allocate bottom up */ - if (!is_pmem) - valid.start += available - allocate; - new_res = nvdimm_allocate_dpa(ndd, label_id, valid.start, allocate); if (!new_res) @@ -608,12 +568,7 @@ static resource_size_t scan_allocate(struct nd_region *nd_region, return 0; } - /* - * If we allocated nothing in the BLK case it may be because we are in - * an initial "pmem-reserve pass". Only do an initial BLK allocation - * when none of the DPA space is reserved. - */ - if ((is_pmem || !ndd->dpa.child) && n == to_allocate) + if (n == to_allocate) return init_dpa_allocation(label_id, nd_region, nd_mapping, n); return n; } @@ -672,7 +627,7 @@ int __reserve_free_pmem(struct device *dev, void *data) if (nd_mapping->nvdimm != nvdimm) continue; - n = nd_pmem_available_dpa(nd_region, nd_mapping, &rem); + n = nd_pmem_available_dpa(nd_region, nd_mapping); if (n == 0) return 0; rem = scan_allocate(nd_region, nd_mapping, &label_id, n); @@ -697,19 +652,6 @@ void release_free_pmem(struct nvdimm_bus *nvdimm_bus, nvdimm_free_dpa(ndd, res); } -static int reserve_free_pmem(struct nvdimm_bus *nvdimm_bus, - struct nd_mapping *nd_mapping) -{ - struct nvdimm *nvdimm = nd_mapping->nvdimm; - int rc; - - rc = device_for_each_child(&nvdimm_bus->dev, nvdimm, - __reserve_free_pmem); - if (rc) - release_free_pmem(nvdimm_bus, nd_mapping); - return rc; -} - /** * grow_dpa_allocation - for each dimm allocate n bytes for @label_id * @nd_region: the set of dimms to allocate @n more bytes from @@ -726,37 +668,14 @@ static int reserve_free_pmem(struct nvdimm_bus *nvdimm_bus, static int grow_dpa_allocation(struct nd_region *nd_region, struct nd_label_id *label_id, resource_size_t n) { - struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(&nd_region->dev); - bool is_pmem = strncmp(label_id->id, "pmem", 4) == 0; int i; for (i = 0; i < nd_region->ndr_mappings; i++) { struct nd_mapping *nd_mapping = &nd_region->mapping[i]; resource_size_t rem = n; - int rc, j; - - /* - * In the BLK case try once with all unallocated PMEM - * reserved, and once without - */ - for (j = is_pmem; j < 2; j++) { - bool blk_only = j == 0; - - if (blk_only) { - rc = reserve_free_pmem(nvdimm_bus, nd_mapping); - if (rc) - return rc; - } - rem = scan_allocate(nd_region, nd_mapping, - label_id, rem); - if (blk_only) - release_free_pmem(nvdimm_bus, nd_mapping); - - /* try again and allow encroachments into PMEM */ - if (rem == 0) - break; - } + int rc; + rem = scan_allocate(nd_region, nd_mapping, label_id, rem); dev_WARN_ONCE(&nd_region->dev, rem, "allocation underrun: %#llx of %#llx bytes\n", (unsigned long long) n - rem, @@ -869,8 +788,8 @@ static ssize_t __size_store(struct device *dev, unsigned long long val) ndd = to_ndd(nd_mapping); /* - * All dimms in an interleave set, or the base dimm for a blk - * region, need to be enabled for the size to be changed. + * All dimms in an interleave set, need to be enabled + * for the size to be changed. */ if (!ndd) return -ENXIO; @@ -1169,9 +1088,6 @@ static ssize_t resource_show(struct device *dev, } static DEVICE_ATTR_ADMIN_RO(resource); -static const unsigned long blk_lbasize_supported[] = { 512, 520, 528, - 4096, 4104, 4160, 4224, 0 }; - static const unsigned long pmem_lbasize_supported[] = { 512, 4096, 0 }; static ssize_t sector_size_show(struct device *dev, @@ -1823,10 +1739,7 @@ static struct device *create_namespace_pmem(struct nd_region *nd_region, /* * Fix up each mapping's 'labels' to have the validated pmem label for * that position at labels[0], and NULL at labels[1]. In the process, - * check that the namespace aligns with interleave-set. We know - * that it does not overlap with any blk namespaces by virtue of - * the dimm being enabled (i.e. nd_label_reserve_dpa() - * succeeded). + * check that the namespace aligns with interleave-set. */ nsl_get_uuid(ndd, nd_label, &uuid); rc = select_pmem_id(nd_region, &uuid); @@ -1931,8 +1844,7 @@ void nd_region_create_ns_seed(struct nd_region *nd_region) * disabled until memory becomes available */ if (!nd_region->ns_seed) - dev_err(&nd_region->dev, "failed to create %s namespace\n", - is_nd_blk(&nd_region->dev) ? "blk" : "pmem"); + dev_err(&nd_region->dev, "failed to create namespace\n"); else nd_device_register(nd_region->ns_seed); } @@ -2028,16 +1940,9 @@ static struct device **scan_labels(struct nd_region *nd_region) list_for_each_entry_safe(label_ent, e, &nd_mapping->labels, list) { struct nd_namespace_label *nd_label = label_ent->label; struct device **__devs; - u32 flags; if (!nd_label) continue; - flags = nsl_get_flags(ndd, nd_label); - if (is_nd_blk(&nd_region->dev) - == !!(flags & NSLABEL_FLAG_LOCAL)) - /* pass, region matches label type */; - else - continue; /* skip labels that describe extents outside of the region */ if (nsl_get_dpa(ndd, nd_label) < nd_mapping->start || @@ -2073,9 +1978,8 @@ static struct device **scan_labels(struct nd_region *nd_region) } - dev_dbg(&nd_region->dev, "discovered %d %s namespace%s\n", - count, is_nd_blk(&nd_region->dev) - ? "blk" : "pmem", count == 1 ? "" : "s"); + dev_dbg(&nd_region->dev, "discovered %d namespace%s\n", count, + count == 1 ? "" : "s"); if (count == 0) { struct nd_namespace_pmem *nspm; @@ -2226,12 +2130,6 @@ static int init_active_labels(struct nd_region *nd_region) if (!label_ent) break; label = nd_label_active(ndd, j); - if (test_bit(NDD_NOBLK, &nvdimm->flags)) { - u32 flags = nsl_get_flags(ndd, label); - - flags &= ~NSLABEL_FLAG_LOCAL; - nsl_set_flags(ndd, label, flags); - } label_ent->label = label; mutex_lock(&nd_mapping->lock); @@ -2275,7 +2173,6 @@ int nd_region_register_namespaces(struct nd_region *nd_region, int *err) devs = create_namespace_io(nd_region); break; case ND_DEVICE_NAMESPACE_PMEM: - case ND_DEVICE_NAMESPACE_BLK: devs = create_namespaces(nd_region); break; default: diff --git a/drivers/nvdimm/nd-core.h b/drivers/nvdimm/nd-core.h index e4af0719cf33..17febf9ac911 100644 --- a/drivers/nvdimm/nd-core.h +++ b/drivers/nvdimm/nd-core.h @@ -82,30 +82,12 @@ static inline void nvdimm_security_overwrite_query(struct work_struct *work) } #endif -/** - * struct blk_alloc_info - tracking info for BLK dpa scanning - * @nd_mapping: blk region mapping boundaries - * @available: decremented in alias_dpa_busy as aliased PMEM is scanned - * @busy: decremented in blk_dpa_busy to account for ranges already - * handled by alias_dpa_busy - * @res: alias_dpa_busy interprets this a free space range that needs to - * be truncated to the valid BLK allocation starting DPA, blk_dpa_busy - * treats it as a busy range that needs the aliased PMEM ranges - * truncated. - */ -struct blk_alloc_info { - struct nd_mapping *nd_mapping; - resource_size_t available, busy; - struct resource *res; -}; - bool is_nvdimm(struct device *dev); bool is_nd_pmem(struct device *dev); bool is_nd_volatile(struct device *dev); -bool is_nd_blk(struct device *dev); static inline bool is_nd_region(struct device *dev) { - return is_nd_pmem(dev) || is_nd_blk(dev) || is_nd_volatile(dev); + return is_nd_pmem(dev) || is_nd_volatile(dev); } static inline bool is_memory(struct device *dev) { @@ -142,14 +124,12 @@ resource_size_t nd_pmem_max_contiguous_dpa(struct nd_region *nd_region, struct nd_mapping *nd_mapping); resource_size_t nd_region_allocatable_dpa(struct nd_region *nd_region); resource_size_t nd_pmem_available_dpa(struct nd_region *nd_region, - struct nd_mapping *nd_mapping, resource_size_t *overlap); -resource_size_t nd_blk_available_dpa(struct nd_region *nd_region); + struct nd_mapping *nd_mapping); resource_size_t nd_region_available_dpa(struct nd_region *nd_region); int nd_region_conflict(struct nd_region *nd_region, resource_size_t start, resource_size_t size); resource_size_t nvdimm_allocated_dpa(struct nvdimm_drvdata *ndd, struct nd_label_id *label_id); -int alias_dpa_busy(struct device *dev, void *data); int nvdimm_num_label_slots(struct nvdimm_drvdata *ndd); void get_ndd(struct nvdimm_drvdata *ndd); resource_size_t __nvdimm_namespace_capacity(struct nd_namespace_common *ndns); diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index 8391bf2729bc..ec5219680092 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -295,9 +295,6 @@ static inline const u8 *nsl_uuid_raw(struct nvdimm_drvdata *ndd, return nd_label->efi.uuid; } -bool nsl_validate_blk_isetcookie(struct nvdimm_drvdata *ndd, - struct nd_namespace_label *nd_label, - u64 isetcookie); bool nsl_validate_type_guid(struct nvdimm_drvdata *ndd, struct nd_namespace_label *nd_label, guid_t *guid); enum nvdimm_claim_class nsl_get_claim_class(struct nvdimm_drvdata *ndd, @@ -437,14 +434,6 @@ static inline bool nsl_validate_nlabel(struct nd_region *nd_region, return nsl_get_nlabel(ndd, nd_label) == nd_region->ndr_mappings; } -struct nd_blk_region { - int (*enable)(struct nvdimm_bus *nvdimm_bus, struct device *dev); - int (*do_io)(struct nd_blk_region *ndbr, resource_size_t dpa, - void *iobuf, u64 len, int rw); - void *blk_provider_data; - struct nd_region nd_region; -}; - /* * Lookup next in the repeating sequence of 01, 10, and 11. */ @@ -672,7 +661,6 @@ static inline int nvdimm_setup_pfn(struct nd_pfn *nd_pfn, return -ENXIO; } #endif -int nd_blk_region_init(struct nd_region *nd_region); int nd_region_activate(struct nd_region *nd_region); static inline bool is_bad_pmem(struct badblocks *bb, sector_t sector, unsigned int len) diff --git a/drivers/nvdimm/region.c b/drivers/nvdimm/region.c index e0c34120df37..188560b1c110 100644 --- a/drivers/nvdimm/region.c +++ b/drivers/nvdimm/region.c @@ -15,6 +15,10 @@ static int nd_region_probe(struct device *dev) static unsigned long once; struct nd_region_data *ndrd; struct nd_region *nd_region = to_nd_region(dev); + struct range range = { + .start = nd_region->ndr_start, + .end = nd_region->ndr_start + nd_region->ndr_size - 1, + }; if (nd_region->num_lanes > num_online_cpus() && nd_region->num_lanes < num_possible_cpus() @@ -30,25 +34,13 @@ static int nd_region_probe(struct device *dev) if (rc) return rc; - rc = nd_blk_region_init(nd_region); - if (rc) - return rc; - - if (is_memory(&nd_region->dev)) { - struct range range = { - .start = nd_region->ndr_start, - .end = nd_region->ndr_start + nd_region->ndr_size - 1, - }; - - if (devm_init_badblocks(dev, &nd_region->bb)) - return -ENODEV; - nd_region->bb_state = sysfs_get_dirent(nd_region->dev.kobj.sd, - "badblocks"); - if (!nd_region->bb_state) - dev_warn(&nd_region->dev, - "'badblocks' notification disabled\n"); - nvdimm_badblocks_populate(nd_region, &nd_region->bb, &range); - } + if (devm_init_badblocks(dev, &nd_region->bb)) + return -ENODEV; + nd_region->bb_state = + sysfs_get_dirent(nd_region->dev.kobj.sd, "badblocks"); + if (!nd_region->bb_state) + dev_warn(dev, "'badblocks' notification disabled\n"); + nvdimm_badblocks_populate(nd_region, &nd_region->bb, &range); rc = nd_region_register_namespaces(nd_region, &err); if (rc < 0) @@ -158,4 +150,3 @@ void nd_region_exit(void) } MODULE_ALIAS_ND_DEVICE(ND_DEVICE_REGION_PMEM); -MODULE_ALIAS_ND_DEVICE(ND_DEVICE_REGION_BLK); diff --git a/drivers/nvdimm/region_devs.c b/drivers/nvdimm/region_devs.c index 70ad891a76ba..0cb274c2b508 100644 --- a/drivers/nvdimm/region_devs.c +++ b/drivers/nvdimm/region_devs.c @@ -134,10 +134,7 @@ static void nd_region_release(struct device *dev) } free_percpu(nd_region->lane); memregion_free(nd_region->id); - if (is_nd_blk(dev)) - kfree(to_nd_blk_region(dev)); - else - kfree(nd_region); + kfree(nd_region); } struct nd_region *to_nd_region(struct device *dev) @@ -157,33 +154,12 @@ struct device *nd_region_dev(struct nd_region *nd_region) } EXPORT_SYMBOL_GPL(nd_region_dev); -struct nd_blk_region *to_nd_blk_region(struct device *dev) -{ - struct nd_region *nd_region = to_nd_region(dev); - - WARN_ON(!is_nd_blk(dev)); - return container_of(nd_region, struct nd_blk_region, nd_region); -} -EXPORT_SYMBOL_GPL(to_nd_blk_region); - void *nd_region_provider_data(struct nd_region *nd_region) { return nd_region->provider_data; } EXPORT_SYMBOL_GPL(nd_region_provider_data); -void *nd_blk_region_provider_data(struct nd_blk_region *ndbr) -{ - return ndbr->blk_provider_data; -} -EXPORT_SYMBOL_GPL(nd_blk_region_provider_data); - -void nd_blk_region_set_provider_data(struct nd_blk_region *ndbr, void *data) -{ - ndbr->blk_provider_data = data; -} -EXPORT_SYMBOL_GPL(nd_blk_region_set_provider_data); - /** * nd_region_to_nstype() - region to an integer namespace type * @nd_region: region-device to interrogate @@ -208,8 +184,6 @@ int nd_region_to_nstype(struct nd_region *nd_region) return ND_DEVICE_NAMESPACE_PMEM; else return ND_DEVICE_NAMESPACE_IO; - } else if (is_nd_blk(&nd_region->dev)) { - return ND_DEVICE_NAMESPACE_BLK; } return 0; @@ -332,14 +306,12 @@ static DEVICE_ATTR_RO(set_cookie); resource_size_t nd_region_available_dpa(struct nd_region *nd_region) { - resource_size_t blk_max_overlap = 0, available, overlap; + resource_size_t available; int i; WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); - retry: available = 0; - overlap = blk_max_overlap; for (i = 0; i < nd_region->ndr_mappings; i++) { struct nd_mapping *nd_mapping = &nd_region->mapping[i]; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); @@ -348,15 +320,7 @@ resource_size_t nd_region_available_dpa(struct nd_region *nd_region) if (!ndd) return 0; - if (is_memory(&nd_region->dev)) { - available += nd_pmem_available_dpa(nd_region, - nd_mapping, &overlap); - if (overlap > blk_max_overlap) { - blk_max_overlap = overlap; - goto retry; - } - } else if (is_nd_blk(&nd_region->dev)) - available += nd_blk_available_dpa(nd_region); + available += nd_pmem_available_dpa(nd_region, nd_mapping); } return available; @@ -364,26 +328,17 @@ resource_size_t nd_region_available_dpa(struct nd_region *nd_region) resource_size_t nd_region_allocatable_dpa(struct nd_region *nd_region) { - resource_size_t available = 0; + resource_size_t avail = 0; int i; - if (is_memory(&nd_region->dev)) - available = PHYS_ADDR_MAX; - WARN_ON(!is_nvdimm_bus_locked(&nd_region->dev)); for (i = 0; i < nd_region->ndr_mappings; i++) { struct nd_mapping *nd_mapping = &nd_region->mapping[i]; - if (is_memory(&nd_region->dev)) - available = min(available, - nd_pmem_max_contiguous_dpa(nd_region, - nd_mapping)); - else if (is_nd_blk(&nd_region->dev)) - available += nd_blk_available_dpa(nd_region); + avail = min_not_zero(avail, nd_pmem_max_contiguous_dpa( + nd_region, nd_mapping)); } - if (is_memory(&nd_region->dev)) - return available * nd_region->ndr_mappings; - return available; + return avail * nd_region->ndr_mappings; } static ssize_t available_size_show(struct device *dev, @@ -693,9 +648,8 @@ static umode_t region_visible(struct kobject *kobj, struct attribute *a, int n) && a != &dev_attr_available_size.attr) return a->mode; - if ((type == ND_DEVICE_NAMESPACE_PMEM - || type == ND_DEVICE_NAMESPACE_BLK) - && a == &dev_attr_available_size.attr) + if (type == ND_DEVICE_NAMESPACE_PMEM && + a == &dev_attr_available_size.attr) return a->mode; else if (is_memory(dev) && nd_set) return a->mode; @@ -828,12 +782,6 @@ static const struct attribute_group *nd_region_attribute_groups[] = { NULL, }; -static const struct device_type nd_blk_device_type = { - .name = "nd_blk", - .release = nd_region_release, - .groups = nd_region_attribute_groups, -}; - static const struct device_type nd_pmem_device_type = { .name = "nd_pmem", .release = nd_region_release, @@ -851,11 +799,6 @@ bool is_nd_pmem(struct device *dev) return dev ? dev->type == &nd_pmem_device_type : false; } -bool is_nd_blk(struct device *dev) -{ - return dev ? dev->type == &nd_blk_device_type : false; -} - bool is_nd_volatile(struct device *dev) { return dev ? dev->type == &nd_volatile_device_type : false; @@ -929,22 +872,6 @@ void nd_region_advance_seeds(struct nd_region *nd_region, struct device *dev) nvdimm_bus_unlock(dev); } -int nd_blk_region_init(struct nd_region *nd_region) -{ - struct device *dev = &nd_region->dev; - struct nvdimm_bus *nvdimm_bus = walk_to_nvdimm_bus(dev); - - if (!is_nd_blk(dev)) - return 0; - - if (nd_region->ndr_mappings < 1) { - dev_dbg(dev, "invalid BLK region\n"); - return -ENXIO; - } - - return to_nd_blk_region(dev)->enable(nvdimm_bus, dev); -} - /** * nd_region_acquire_lane - allocate and lock a lane * @nd_region: region id and number of lanes possible @@ -1007,24 +934,10 @@ EXPORT_SYMBOL(nd_region_release_lane); static unsigned long default_align(struct nd_region *nd_region) { unsigned long align; - int i, mappings; u32 remainder; + int mappings; - if (is_nd_blk(&nd_region->dev)) - align = PAGE_SIZE; - else - align = MEMREMAP_COMPAT_ALIGN_MAX; - - for (i = 0; i < nd_region->ndr_mappings; i++) { - struct nd_mapping *nd_mapping = &nd_region->mapping[i]; - struct nvdimm *nvdimm = nd_mapping->nvdimm; - - if (test_bit(NDD_ALIASING, &nvdimm->flags)) { - align = MEMREMAP_COMPAT_ALIGN_MAX; - break; - } - } - + align = MEMREMAP_COMPAT_ALIGN_MAX; if (nd_region->ndr_size < MEMREMAP_COMPAT_ALIGN_MAX) align = PAGE_SIZE; @@ -1042,7 +955,6 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus, { struct nd_region *nd_region; struct device *dev; - void *region_buf; unsigned int i; int ro = 0; @@ -1060,36 +972,13 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus, if (test_bit(NDD_UNARMED, &nvdimm->flags)) ro = 1; - if (test_bit(NDD_NOBLK, &nvdimm->flags) - && dev_type == &nd_blk_device_type) { - dev_err(&nvdimm_bus->dev, "%s: %s mapping%d is not BLK capable\n", - caller, dev_name(&nvdimm->dev), i); - return NULL; - } } - if (dev_type == &nd_blk_device_type) { - struct nd_blk_region_desc *ndbr_desc; - struct nd_blk_region *ndbr; - - ndbr_desc = to_blk_region_desc(ndr_desc); - ndbr = kzalloc(sizeof(*ndbr) + sizeof(struct nd_mapping) - * ndr_desc->num_mappings, - GFP_KERNEL); - if (ndbr) { - nd_region = &ndbr->nd_region; - ndbr->enable = ndbr_desc->enable; - ndbr->do_io = ndbr_desc->do_io; - } - region_buf = ndbr; - } else { - nd_region = kzalloc(struct_size(nd_region, mapping, - ndr_desc->num_mappings), - GFP_KERNEL); - region_buf = nd_region; - } + nd_region = + kzalloc(struct_size(nd_region, mapping, ndr_desc->num_mappings), + GFP_KERNEL); - if (!region_buf) + if (!nd_region) return NULL; nd_region->id = memregion_alloc(GFP_KERNEL); if (nd_region->id < 0) @@ -1153,7 +1042,7 @@ static struct nd_region *nd_region_create(struct nvdimm_bus *nvdimm_bus, err_percpu: memregion_free(nd_region->id); err_id: - kfree(region_buf); + kfree(nd_region); return NULL; } @@ -1166,17 +1055,6 @@ struct nd_region *nvdimm_pmem_region_create(struct nvdimm_bus *nvdimm_bus, } EXPORT_SYMBOL_GPL(nvdimm_pmem_region_create); -struct nd_region *nvdimm_blk_region_create(struct nvdimm_bus *nvdimm_bus, - struct nd_region_desc *ndr_desc) -{ - if (ndr_desc->num_mappings > 1) - return NULL; - ndr_desc->num_lanes = min(ndr_desc->num_lanes, ND_MAX_LANES); - return nd_region_create(nvdimm_bus, ndr_desc, &nd_blk_device_type, - __func__); -} -EXPORT_SYMBOL_GPL(nvdimm_blk_region_create); - struct nd_region *nvdimm_volatile_region_create(struct nvdimm_bus *nvdimm_bus, struct nd_region_desc *ndr_desc) { @@ -1201,7 +1079,7 @@ int nvdimm_flush(struct nd_region *nd_region, struct bio *bio) } /** * nvdimm_flush - flush any posted write queues between the cpu and pmem media - * @nd_region: blk or interleaved pmem region + * @nd_region: interleaved pmem region */ int generic_nvdimm_flush(struct nd_region *nd_region) { @@ -1234,7 +1112,7 @@ EXPORT_SYMBOL_GPL(nvdimm_flush); /** * nvdimm_has_flush - determine write flushing requirements - * @nd_region: blk or interleaved pmem region + * @nd_region: interleaved pmem region * * Returns 1 if writes require flushing * Returns 0 if writes do not require flushing diff --git a/include/linux/libnvdimm.h b/include/linux/libnvdimm.h index 7074aa9af525..0d61e07b6827 100644 --- a/include/linux/libnvdimm.h +++ b/include/linux/libnvdimm.h @@ -25,8 +25,6 @@ struct badrange { }; enum { - /* when a dimm supports both PMEM and BLK access a label is required */ - NDD_ALIASING = 0, /* unarmed memory devices may not persist writes */ NDD_UNARMED = 1, /* locked memory devices should not be accessed */ @@ -35,8 +33,6 @@ enum { NDD_SECURITY_OVERWRITE = 3, /* tracking whether or not there is a pending device reference */ NDD_WORK_PENDING = 4, - /* ignore / filter NSLABEL_FLAG_LOCAL for this DIMM, i.e. no aliasing */ - NDD_NOBLK = 5, /* dimm supports namespace labels */ NDD_LABELING = 6, @@ -140,21 +136,6 @@ static inline void __iomem *devm_nvdimm_ioremap(struct device *dev, } struct nvdimm_bus; -struct module; -struct nd_blk_region; -struct nd_blk_region_desc { - int (*enable)(struct nvdimm_bus *nvdimm_bus, struct device *dev); - int (*do_io)(struct nd_blk_region *ndbr, resource_size_t dpa, - void *iobuf, u64 len, int rw); - struct nd_region_desc ndr_desc; -}; - -static inline struct nd_blk_region_desc *to_blk_region_desc( - struct nd_region_desc *ndr_desc) -{ - return container_of(ndr_desc, struct nd_blk_region_desc, ndr_desc); - -} /* * Note that separate bits for locked + unlocked are defined so that @@ -257,7 +238,6 @@ struct nvdimm_bus *nvdimm_to_bus(struct nvdimm *nvdimm); struct nvdimm *to_nvdimm(struct device *dev); struct nd_region *to_nd_region(struct device *dev); struct device *nd_region_dev(struct nd_region *nd_region); -struct nd_blk_region *to_nd_blk_region(struct device *dev); struct nvdimm_bus_descriptor *to_nd_desc(struct nvdimm_bus *nvdimm_bus); struct device *to_nvdimm_bus_dev(struct nvdimm_bus *nvdimm_bus); const char *nvdimm_name(struct nvdimm *nvdimm); @@ -295,10 +275,6 @@ struct nd_region *nvdimm_blk_region_create(struct nvdimm_bus *nvdimm_bus, struct nd_region *nvdimm_volatile_region_create(struct nvdimm_bus *nvdimm_bus, struct nd_region_desc *ndr_desc); void *nd_region_provider_data(struct nd_region *nd_region); -void *nd_blk_region_provider_data(struct nd_blk_region *ndbr); -void nd_blk_region_set_provider_data(struct nd_blk_region *ndbr, void *data); -struct nvdimm *nd_blk_region_to_dimm(struct nd_blk_region *ndbr); -unsigned long nd_blk_memremap_flags(struct nd_blk_region *ndbr); unsigned int nd_region_acquire_lane(struct nd_region *nd_region); void nd_region_release_lane(struct nd_region *nd_region, unsigned int lane); u64 nd_fletcher64(void *addr, size_t len, bool le); diff --git a/include/uapi/linux/ndctl.h b/include/uapi/linux/ndctl.h index 8cf1e4884fd5..17e02b64ea2e 100644 --- a/include/uapi/linux/ndctl.h +++ b/include/uapi/linux/ndctl.h @@ -189,7 +189,6 @@ static inline const char *nvdimm_cmd_name(unsigned cmd) #define ND_DEVICE_REGION_BLK 3 /* nd_region: (parent of BLK namespaces) */ #define ND_DEVICE_NAMESPACE_IO 4 /* legacy persistent memory */ #define ND_DEVICE_NAMESPACE_PMEM 5 /* PMEM namespace (may alias with BLK) */ -#define ND_DEVICE_NAMESPACE_BLK 6 /* BLK namespace (may alias with PMEM) */ #define ND_DEVICE_DAX_PMEM 7 /* Device DAX interface to pmem */ enum nd_driver_flags { @@ -198,7 +197,6 @@ enum nd_driver_flags { ND_DRIVER_REGION_BLK = 1 << ND_DEVICE_REGION_BLK, ND_DRIVER_NAMESPACE_IO = 1 << ND_DEVICE_NAMESPACE_IO, ND_DRIVER_NAMESPACE_PMEM = 1 << ND_DEVICE_NAMESPACE_PMEM, - ND_DRIVER_NAMESPACE_BLK = 1 << ND_DEVICE_NAMESPACE_BLK, ND_DRIVER_DAX_PMEM = 1 << ND_DEVICE_DAX_PMEM, }; diff --git a/tools/testing/nvdimm/test/ndtest.c b/tools/testing/nvdimm/test/ndtest.c index 3ca7c32e9362..4d1a947367f9 100644 --- a/tools/testing/nvdimm/test/ndtest.c +++ b/tools/testing/nvdimm/test/ndtest.c @@ -338,62 +338,6 @@ static int ndtest_ctl(struct nvdimm_bus_descriptor *nd_desc, return 0; } -static int ndtest_blk_do_io(struct nd_blk_region *ndbr, resource_size_t dpa, - void *iobuf, u64 len, int rw) -{ - struct ndtest_dimm *dimm = ndbr->blk_provider_data; - struct ndtest_blk_mmio *mmio = dimm->mmio; - struct nd_region *nd_region = &ndbr->nd_region; - unsigned int lane; - - if (!mmio) - return -ENOMEM; - - lane = nd_region_acquire_lane(nd_region); - if (rw) - memcpy(mmio->base + dpa, iobuf, len); - else { - memcpy(iobuf, mmio->base + dpa, len); - arch_invalidate_pmem(mmio->base + dpa, len); - } - - nd_region_release_lane(nd_region, lane); - - return 0; -} - -static int ndtest_blk_region_enable(struct nvdimm_bus *nvdimm_bus, - struct device *dev) -{ - struct nd_blk_region *ndbr = to_nd_blk_region(dev); - struct nvdimm *nvdimm; - struct ndtest_dimm *dimm; - struct ndtest_blk_mmio *mmio; - - nvdimm = nd_blk_region_to_dimm(ndbr); - dimm = nvdimm_provider_data(nvdimm); - - nd_blk_region_set_provider_data(ndbr, dimm); - dimm->blk_region = to_nd_region(dev); - - mmio = devm_kzalloc(dev, sizeof(struct ndtest_blk_mmio), GFP_KERNEL); - if (!mmio) - return -ENOMEM; - - mmio->base = (void __iomem *) devm_nvdimm_memremap( - dev, dimm->address, 12, nd_blk_memremap_flags(ndbr)); - if (!mmio->base) { - dev_err(dev, "%s failed to map blk dimm\n", nvdimm_name(nvdimm)); - return -ENOMEM; - } - mmio->size = dimm->size; - mmio->base_offset = 0; - - dimm->mmio = mmio; - - return 0; -} - static struct nfit_test_resource *ndtest_resource_lookup(resource_size_t addr) { int i; @@ -523,17 +467,16 @@ static int ndtest_create_region(struct ndtest_priv *p, struct ndtest_region *region) { struct nd_mapping_desc mappings[NDTEST_MAX_MAPPING]; - struct nd_blk_region_desc ndbr_desc; + struct nd_region_desc *ndr_desc, _ndr_desc; struct nd_interleave_set *nd_set; - struct nd_region_desc *ndr_desc; struct resource res; int i, ndimm = region->mapping[0].dimm; u64 uuid[2]; memset(&res, 0, sizeof(res)); memset(&mappings, 0, sizeof(mappings)); - memset(&ndbr_desc, 0, sizeof(ndbr_desc)); - ndr_desc = &ndbr_desc.ndr_desc; + memset(&_ndr_desc, 0, sizeof(_ndr_desc)); + ndr_desc = &_ndr_desc; if (!ndtest_alloc_resource(p, region->size, &res.start)) return -ENOMEM; @@ -857,10 +800,8 @@ static int ndtest_dimm_register(struct ndtest_priv *priv, struct device *dev = &priv->pdev.dev; unsigned long dimm_flags = dimm->flags; - if (dimm->num_formats > 1) { - set_bit(NDD_ALIASING, &dimm_flags); + if (dimm->num_formats > 1) set_bit(NDD_LABELING, &dimm_flags); - } if (dimm->flags & PAPR_PMEM_UNARMED_MASK) set_bit(NDD_UNARMED, &dimm_flags); -- cgit v1.2.3 From de7a9e949f4f094741f708cd05572f932d009d02 Mon Sep 17 00:00:00 2001 From: Kajol Jain Date: Wed, 23 Mar 2022 22:15:49 +0530 Subject: drivers/nvdimm: Fix build failure when CONFIG_PERF_EVENTS is not set The following build failure occurs when CONFIG_PERF_EVENTS is not set as generic pmu functions are not visible in that scenario. |-- s390-randconfig-r044-20220313 | |-- nd_perf.c:(.text):undefined-reference-to-perf_pmu_migrate_context | |-- nd_perf.c:(.text):undefined-reference-to-perf_pmu_register | `-- nd_perf.c:(.text):undefined-reference-to-perf_pmu_unregister Similar build failure in nds32 architecture: nd_perf.c:(.text+0x21e): undefined reference to `perf_pmu_migrate_context' nd_perf.c:(.text+0x434): undefined reference to `perf_pmu_register' nd_perf.c:(.text+0x57c): undefined reference to `perf_pmu_unregister' Fix this issue by adding check for CONFIG_PERF_EVENTS config option and disabling the nvdimm perf interface incase this config is not set. Also remove function declaration of perf_pmu_migrate_context, perf_pmu_register, perf_pmu_unregister functions from nd.h as these are common pmu functions which are part of perf_event.h and since we are disabling nvdimm perf interface incase CONFIG_PERF_EVENTS option is not set, we not need to declare them in nd.h Also move the platform_device header file addition part from nd.h to nd_perf.c and add stub functions for register_nvdimm_pmu and unregister_nvdimm_pmu functions to handle CONFIG_PERF_EVENTS=n case. Fixes: 0fab1ba6ad6b ("drivers/nvdimm: Add perf interface to expose nvdimm performance stats") (Commit id based on libnvdimm-for-next tree) Signed-off-by: Kajol Jain Link: https://lore.kernel.org/all/62317124.YBQFU33+s%2FwdvWGj%25lkp@intel.com/ Reported-by: kernel test robot Link: https://lore.kernel.org/r/20220323164550.109768-1-kjain@linux.ibm.com Signed-off-by: Dan Williams --- drivers/nvdimm/Makefile | 2 +- drivers/nvdimm/nd_perf.c | 1 + include/linux/nd.h | 16 ++++++++++++---- 3 files changed, 14 insertions(+), 5 deletions(-) (limited to 'include/linux') diff --git a/drivers/nvdimm/Makefile b/drivers/nvdimm/Makefile index 3fb806748716..ba0296dca9db 100644 --- a/drivers/nvdimm/Makefile +++ b/drivers/nvdimm/Makefile @@ -15,7 +15,7 @@ nd_e820-y := e820.o libnvdimm-y := core.o libnvdimm-y += bus.o libnvdimm-y += dimm_devs.o -libnvdimm-y += nd_perf.o +libnvdimm-$(CONFIG_PERF_EVENTS) += nd_perf.o libnvdimm-y += dimm.o libnvdimm-y += region_devs.o libnvdimm-y += region.o diff --git a/drivers/nvdimm/nd_perf.c b/drivers/nvdimm/nd_perf.c index 314415894acf..433bbb68ae64 100644 --- a/drivers/nvdimm/nd_perf.c +++ b/drivers/nvdimm/nd_perf.c @@ -10,6 +10,7 @@ #define pr_fmt(fmt) "nvdimm_pmu: " fmt #include +#include #define EVENT(_name, _code) enum{_name = _code} diff --git a/include/linux/nd.h b/include/linux/nd.h index 7b2ccbdc1cbc..b9771ba1ef87 100644 --- a/include/linux/nd.h +++ b/include/linux/nd.h @@ -9,7 +9,6 @@ #include #include #include -#include enum nvdimm_event { NVDIMM_REVALIDATE_POISON, @@ -57,15 +56,24 @@ struct nvdimm_pmu { struct cpumask arch_cpumask; }; +struct platform_device; + +#ifdef CONFIG_PERF_EVENTS extern ssize_t nvdimm_events_sysfs_show(struct device *dev, struct device_attribute *attr, char *page); int register_nvdimm_pmu(struct nvdimm_pmu *nvdimm, struct platform_device *pdev); void unregister_nvdimm_pmu(struct nvdimm_pmu *nd_pmu); -void perf_pmu_migrate_context(struct pmu *pmu, int src_cpu, int dst_cpu); -int perf_pmu_register(struct pmu *pmu, const char *name, int type); -void perf_pmu_unregister(struct pmu *pmu); + +#else +static inline int register_nvdimm_pmu(struct nvdimm_pmu *nvdimm, struct platform_device *pdev) +{ + return -ENXIO; +} + +static inline void unregister_nvdimm_pmu(struct nvdimm_pmu *nd_pmu) { } +#endif struct nd_device_driver { struct device_driver drv; -- cgit v1.2.3