// SPDX-License-Identifier: GPL-2.0-only #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "../watermark.h" #include "nfit_test.h" #include "ndtest.h" enum { DIMM_SIZE = SZ_32M, LABEL_SIZE = SZ_128K, NUM_INSTANCES = 2, NUM_DCR = 4, NDTEST_MAX_MAPPING = 6, }; #define NDTEST_SCM_DIMM_CMD_MASK \ ((1ul << ND_CMD_GET_CONFIG_SIZE) | \ (1ul << ND_CMD_GET_CONFIG_DATA) | \ (1ul << ND_CMD_SET_CONFIG_DATA) | \ (1ul << ND_CMD_CALL)) #define NFIT_DIMM_HANDLE(node, socket, imc, chan, dimm) \ (((node & 0xfff) << 16) | ((socket & 0xf) << 12) \ | ((imc & 0xf) << 8) | ((chan & 0xf) << 4) | (dimm & 0xf)) static DEFINE_SPINLOCK(ndtest_lock); static struct ndtest_priv *instances[NUM_INSTANCES]; static const struct class ndtest_dimm_class = { .name = "nfit_test_dimm", }; static struct gen_pool *ndtest_pool; static struct ndtest_dimm dimm_group1[] = { { .size = DIMM_SIZE, .handle = NFIT_DIMM_HANDLE(0, 0, 0, 0, 0), .uuid_str = "1e5c75d2-b618-11ea-9aa3-507b9ddc0f72", .physical_id = 0, .num_formats = 2, }, { .size = DIMM_SIZE, .handle = NFIT_DIMM_HANDLE(0, 0, 0, 0, 1), .uuid_str = "1c4d43ac-b618-11ea-be80-507b9ddc0f72", .physical_id = 1, .num_formats = 2, }, { .size = DIMM_SIZE, .handle = NFIT_DIMM_HANDLE(0, 0, 1, 0, 0), .uuid_str = "a9f17ffc-b618-11ea-b36d-507b9ddc0f72", .physical_id = 2, .num_formats = 2, }, { .size = DIMM_SIZE, .handle = NFIT_DIMM_HANDLE(0, 0, 1, 0, 1), .uuid_str = "b6b83b22-b618-11ea-8aae-507b9ddc0f72", .physical_id = 3, .num_formats = 2, }, { .size = DIMM_SIZE, .handle = NFIT_DIMM_HANDLE(0, 1, 0, 0, 0), .uuid_str = "bf9baaee-b618-11ea-b181-507b9ddc0f72", .physical_id = 4, .num_formats = 2, }, }; static struct ndtest_dimm dimm_group2[] = { { .size = DIMM_SIZE, .handle = NFIT_DIMM_HANDLE(1, 0, 0, 0, 0), .uuid_str = "ca0817e2-b618-11ea-9db3-507b9ddc0f72", .physical_id = 0, .num_formats = 1, .flags = PAPR_PMEM_UNARMED | PAPR_PMEM_EMPTY | PAPR_PMEM_SAVE_FAILED | PAPR_PMEM_SHUTDOWN_DIRTY | PAPR_PMEM_HEALTH_FATAL, }, }; static struct ndtest_mapping region0_mapping[] = { { .dimm = 0, .position = 0, .start = 0, .size = SZ_16M, }, { .dimm = 1, .position = 1, .start = 0, .size = SZ_16M, } }; static struct ndtest_mapping region1_mapping[] = { { .dimm = 0, .position = 0, .start = SZ_16M, .size = SZ_16M, }, { .dimm = 1, .position = 1, .start = SZ_16M, .size = SZ_16M, }, { .dimm = 2, .position = 2, .start = SZ_16M, .size = SZ_16M, }, { .dimm = 3, .position = 3, .start = SZ_16M, .size = SZ_16M, }, }; static struct ndtest_region bus0_regions[] = { { .type = ND_DEVICE_NAMESPACE_PMEM, .num_mappings = ARRAY_SIZE(region0_mapping), .mapping = region0_mapping, .size = DIMM_SIZE, .range_index = 1, }, { .type = ND_DEVICE_NAMESPACE_PMEM, .num_mappings = ARRAY_SIZE(region1_mapping), .mapping = region1_mapping, .size = DIMM_SIZE * 2, .range_index = 2, }, }; static struct ndtest_mapping region6_mapping[] = { { .dimm = 0, .position = 0, .start = 0, .size = DIMM_SIZE, }, }; static struct ndtest_region bus1_regions[] = { { .type = ND_DEVICE_NAMESPACE_IO, .num_mappings = ARRAY_SIZE(region6_mapping), .mapping = region6_mapping, .size = DIMM_SIZE, .range_index = 1, }, }; static struct ndtest_config bus_configs[NUM_INSTANCES] = { /* bus 1 */ { .dimm_start = 0, .dimm_count = ARRAY_SIZE(dimm_group1), .dimms = dimm_group1, .regions = bus0_regions, .num_regions = ARRAY_SIZE(bus0_regions), }, /* bus 2 */ { .dimm_start = ARRAY_SIZE(dimm_group1), .dimm_count = ARRAY_SIZE(dimm_group2), .dimms = dimm_group2, .regions = bus1_regions, .num_regions = ARRAY_SIZE(bus1_regions), }, }; static inline struct ndtest_priv *to_ndtest_priv(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); return container_of(pdev, struct ndtest_priv, pdev); } static int ndtest_config_get(struct ndtest_dimm *p, unsigned int buf_len, struct nd_cmd_get_config_data_hdr *hdr) { unsigned int len; if ((hdr->in_offset + hdr->in_length) > LABEL_SIZE) return -EINVAL; hdr->status = 0; len = min(hdr->in_length, LABEL_SIZE - hdr->in_offset); memcpy(hdr->out_buf, p->label_area + hdr->in_offset, len); return buf_len - len; } static int ndtest_config_set(struct ndtest_dimm *p, unsigned int buf_len, struct nd_cmd_set_config_hdr *hdr) { unsigned int len; if ((hdr->in_offset + hdr->in_length) > LABEL_SIZE) return -EINVAL; len = min(hdr->in_length, LABEL_SIZE - hdr->in_offset); memcpy(p->label_area + hdr->in_offset, hdr->in_buf, len); return buf_len - len; } static int ndtest_get_config_size(struct ndtest_dimm *dimm, unsigned int buf_len, struct nd_cmd_get_config_size *size) { size->status = 0; size->max_xfer = 8; size->config_size = dimm->config_size; return 0; } static int ndtest_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm, unsigned int cmd, void *buf, unsigned int buf_len, int *cmd_rc) { struct ndtest_dimm *dimm; int _cmd_rc; if (!cmd_rc) cmd_rc = &_cmd_rc; *cmd_rc = 0; if (!nvdimm) return -EINVAL; dimm = nvdimm_provider_data(nvdimm); if (!dimm) return -EINVAL; switch (cmd) { case ND_CMD_GET_CONFIG_SIZE: *cmd_rc = ndtest_get_config_size(dimm, buf_len, buf); break; case ND_CMD_GET_CONFIG_DATA: *cmd_rc = ndtest_config_get(dimm, buf_len, buf); break; case ND_CMD_SET_CONFIG_DATA: *cmd_rc = ndtest_config_set(dimm, buf_len, buf); break; default: return -EINVAL; } /* Failures for a DIMM can be injected using fail_cmd and * fail_cmd_code, see the device attributes below */ if ((1 << cmd) & dimm->fail_cmd) return dimm->fail_cmd_code ? dimm->fail_cmd_code : -EIO; return 0; } static struct nfit_test_resource *ndtest_resource_lookup(resource_size_t addr) { int i; for (i = 0; i < NUM_INSTANCES; i++) { struct nfit_test_resource *n, *nfit_res = NULL; struct ndtest_priv *t = instances[i]; if (!t) continue; spin_lock(&ndtest_lock); list_for_each_entry(n, &t->resources, list) { if (addr >= n->res.start && (addr < n->res.start + resource_size(&n->res))) { nfit_res = n; break; } else if (addr >= (unsigned long) n->buf && (addr < (unsigned long) n->buf + resource_size(&n->res))) { nfit_res = n; break; } } spin_unlock(&ndtest_lock); if (nfit_res) return nfit_res; } pr_warn("Failed to get resource\n"); return NULL; } static void ndtest_release_resource(void *data) { struct nfit_test_resource *res = data; spin_lock(&ndtest_lock); list_del(&res->list); spin_unlock(&ndtest_lock); if (resource_size(&res->res) >= DIMM_SIZE) gen_pool_free(ndtest_pool, res->res.start, resource_size(&res->res)); vfree(res->buf); kfree(res); } static void *ndtest_alloc_resource(struct ndtest_priv *p, size_t size, dma_addr_t *dma) { dma_addr_t __dma; void *buf; struct nfit_test_resource *res; struct genpool_data_align data = { .align = SZ_128M, }; res = kzalloc(sizeof(*res), GFP_KERNEL); if (!res) return NULL; buf = vmalloc(size); if (size >= DIMM_SIZE) __dma = gen_pool_alloc_algo(ndtest_pool, size, gen_pool_first_fit_align, &data); else __dma = (unsigned long) buf; if (!__dma) goto buf_err; INIT_LIST_HEAD(&res->list); res->dev = &p->pdev.dev; res->buf = buf; res->res.start = __dma; res->res.end = __dma + size - 1; res->res.name = "NFIT"; spin_lock_init(&res->lock); INIT_LIST_HEAD(&res->requests); spin_lock(&ndtest_lock); list_add(&res->list, &p->resources); spin_unlock(&ndtest_lock); if (dma) *dma = __dma; if (!devm_add_action(&p->pdev.dev, ndtest_release_resource, res)) return res->buf; buf_err: if (__dma && size >= DIMM_SIZE) gen_pool_free(ndtest_pool, __dma, size); if (buf) vfree(buf); kfree(res); return NULL; } static ssize_t range_index_show(struct device *dev, struct device_attribute *attr, char *buf) { struct nd_region *nd_region = to_nd_region(dev); struct ndtest_region *region = nd_region_provider_data(nd_region); return sprintf(buf, "%d\n", region->range_index); } static DEVICE_ATTR_RO(range_index); static struct attribute *ndtest_region_attributes[] = { &dev_attr_range_index.attr, NULL, }; static const struct attribute_group ndtest_region_attribute_group = { .name = "papr", .attrs = ndtest_region_attributes, }; static const struct attribute_group *ndtest_region_attribute_groups[] = { &ndtest_region_attribute_group, NULL, }; static int ndtest_create_region(struct ndtest_priv *p, struct ndtest_region *region) { struct nd_mapping_desc mappings[NDTEST_MAX_MAPPING]; struct nd_region_desc *ndr_desc, _ndr_desc; struct nd_interleave_set *nd_set; struct resource res; int i, ndimm = region->mapping[0].dimm; u64 uuid[2]; memset(&res, 0, sizeof(res)); memset(&mappings, 0, sizeof(mappings)); memset(&_ndr_desc, 0, sizeof(_ndr_desc)); ndr_desc = &_ndr_desc; if (!ndtest_alloc_resource(p, region->size, &res.start)) return -ENOMEM; res.end = res.start + region->size - 1; ndr_desc->mapping = mappings; ndr_desc->res = &res; ndr_desc->provider_data = region; ndr_desc->attr_groups = ndtest_region_attribute_groups; if (uuid_parse(p->config->dimms[ndimm].uuid_str, (uuid_t *)uuid)) { pr_err("failed to parse UUID\n"); return -ENXIO; } nd_set = devm_kzalloc(&p->pdev.dev, sizeof(*nd_set), GFP_KERNEL); if (!nd_set) return -ENOMEM; nd_set->cookie1 = cpu_to_le64(uuid[0]); nd_set->cookie2 = cpu_to_le64(uuid[1]); nd_set->altcookie = nd_set->cookie1; ndr_desc->nd_set = nd_set; for (i = 0; i < region->num_mappings; i++) { ndimm = region->mapping[i].dimm; mappings[i].start = region->mapping[i].start; mappings[i].size = region->mapping[i].size; mappings[i].position = region->mapping[i].position; mappings[i].nvdimm = p->config->dimms[ndimm].nvdimm; } ndr_desc->num_mappings = region->num_mappings; region->region = nvdimm_pmem_region_create(p->bus, ndr_desc); if (!region->region) { dev_err(&p->pdev.dev, "Error registering region %pR\n", ndr_desc->res); return -ENXIO; } return 0; } static int ndtest_init_regions(struct ndtest_priv *p) { int i, ret = 0; for (i = 0; i < p->config->num_regions; i++) { ret = ndtest_create_region(p, &p->config->regions[i]); if (ret) return ret; } return 0; } static void put_dimms(void *data) { struct ndtest_priv *p = data; int i; for (i = 0; i < p->config->dimm_count; i++) if (p->config->dimms[i].dev) { device_unregister(p->config->dimms[i].dev); p->config->dimms[i].dev = NULL; } } static ssize_t handle_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ndtest_dimm *dimm = dev_get_drvdata(dev); return sprintf(buf, "%#x\n", dimm->handle); } static DEVICE_ATTR_RO(handle); static ssize_t fail_cmd_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ndtest_dimm *dimm = dev_get_drvdata(dev); return sprintf(buf, "%#x\n", dimm->fail_cmd); } static ssize_t fail_cmd_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { struct ndtest_dimm *dimm = dev_get_drvdata(dev); unsigned long val; ssize_t rc; rc = kstrtol(buf, 0, &val); if (rc) return rc; dimm->fail_cmd = val; return size; } static DEVICE_ATTR_RW(fail_cmd); static ssize_t fail_cmd_code_show(struct device *dev, struct device_attribute *attr, char *buf) { struct ndtest_dimm *dimm = dev_get_drvdata(dev); return sprintf(buf, "%d\n", dimm->fail_cmd_code); } static ssize_t fail_cmd_code_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { struct ndtest_dimm *dimm = dev_get_drvdata(dev); unsigned long val; ssize_t rc; rc = kstrtol(buf, 0, &val); if (rc) return rc; dimm->fail_cmd_code = val; return size; } static DEVICE_ATTR_RW(fail_cmd_code); static struct attribute *dimm_attributes[] = { &dev_attr_handle.attr, &dev_attr_fail_cmd.attr, &dev_attr_fail_cmd_code.attr, NULL, }; static struct attribute_group dimm_attribute_group = { .attrs = dimm_attributes, }; static const struct attribute_group *dimm_attribute_groups[] = { &dimm_attribute_group, NULL, }; static ssize_t phys_id_show(struct device *dev, struct device_attribute *attr, char *buf) { struct nvdimm *nvdimm = to_nvdimm(dev); struct ndtest_dimm *dimm = nvdimm_provider_data(nvdimm); return sprintf(buf, "%#x\n", dimm->physical_id); } static DEVICE_ATTR_RO(phys_id); static ssize_t vendor_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "0x1234567\n"); } static DEVICE_ATTR_RO(vendor); static ssize_t id_show(struct device *dev, struct device_attribute *attr, char *buf) { struct nvdimm *nvdimm = to_nvdimm(dev); struct ndtest_dimm *dimm = nvdimm_provider_data(nvdimm); return sprintf(buf, "%04x-%02x-%04x-%08x", 0xabcd, 0xa, 2016, ~(dimm->handle)); } static DEVICE_ATTR_RO(id); static ssize_t nvdimm_handle_show(struct device *dev, struct device_attribute *attr, char *buf) { struct nvdimm *nvdimm = to_nvdimm(dev); struct ndtest_dimm *dimm = nvdimm_provider_data(nvdimm); return sprintf(buf, "%#x\n", dimm->handle); } static struct device_attribute dev_attr_nvdimm_show_handle = { .attr = { .name = "handle", .mode = 0444 }, .show = nvdimm_handle_show, }; static ssize_t subsystem_vendor_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "0x%04x\n", 0); } static DEVICE_ATTR_RO(subsystem_vendor); static ssize_t dirty_shutdown_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "%d\n", 42); } static DEVICE_ATTR_RO(dirty_shutdown); static ssize_t formats_show(struct device *dev, struct device_attribute *attr, char *buf) { struct nvdimm *nvdimm = to_nvdimm(dev); struct ndtest_dimm *dimm = nvdimm_provider_data(nvdimm); return sprintf(buf, "%d\n", dimm->num_formats); } static DEVICE_ATTR_RO(formats); static ssize_t format_show(struct device *dev, struct device_attribute *attr, char *buf) { struct nvdimm *nvdimm = to_nvdimm(dev); struct ndtest_dimm *dimm = nvdimm_provider_data(nvdimm); if (dimm->num_formats > 1) return sprintf(buf, "0x201\n"); return sprintf(buf, "0x101\n"); } static DEVICE_ATTR_RO(format); static ssize_t format1_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "0x301\n"); } static DEVICE_ATTR_RO(format1); static umode_t ndtest_nvdimm_attr_visible(struct kobject *kobj, struct attribute *a, int n) { struct device *dev = container_of(kobj, struct device, kobj); struct nvdimm *nvdimm = to_nvdimm(dev); struct ndtest_dimm *dimm = nvdimm_provider_data(nvdimm); if (a == &dev_attr_format1.attr && dimm->num_formats <= 1) return 0; return a->mode; } static ssize_t flags_show(struct device *dev, struct device_attribute *attr, char *buf) { struct nvdimm *nvdimm = to_nvdimm(dev); struct ndtest_dimm *dimm = nvdimm_provider_data(nvdimm); struct seq_buf s; u64 flags; flags = dimm->flags; seq_buf_init(&s, buf, PAGE_SIZE); if (flags & PAPR_PMEM_UNARMED_MASK) seq_buf_printf(&s, "not_armed "); if (flags & PAPR_PMEM_BAD_SHUTDOWN_MASK) seq_buf_printf(&s, "flush_fail "); if (flags & PAPR_PMEM_BAD_RESTORE_MASK) seq_buf_printf(&s, "restore_fail "); if (flags & PAPR_PMEM_SAVE_MASK) seq_buf_printf(&s, "save_fail "); if (flags & PAPR_PMEM_SMART_EVENT_MASK) seq_buf_printf(&s, "smart_notify "); if (seq_buf_used(&s)) seq_buf_printf(&s, "\n"); return seq_buf_used(&s); } static DEVICE_ATTR_RO(flags); static struct attribute *ndtest_nvdimm_attributes[] = { &dev_attr_nvdimm_show_handle.attr, &dev_attr_vendor.attr, &dev_attr_id.attr, &dev_attr_phys_id.attr, &dev_attr_subsystem_vendor.attr, &dev_attr_dirty_shutdown.attr, &dev_attr_formats.attr, &dev_attr_format.attr, &dev_attr_format1.attr, &dev_attr_flags.attr, NULL, }; static const struct attribute_group ndtest_nvdimm_attribute_group = { .name = "papr", .attrs = ndtest_nvdimm_attributes, .is_visible = ndtest_nvdimm_attr_visible, }; static const struct attribute_group *ndtest_nvdimm_attribute_groups[] = { &ndtest_nvdimm_attribute_group, NULL, }; static int ndtest_dimm_register(struct ndtest_priv *priv, struct ndtest_dimm *dimm, int id) { struct device *dev = &priv->pdev.dev; unsigned long dimm_flags = 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); dimm->nvdimm = nvdimm_create(priv->bus, dimm, ndtest_nvdimm_attribute_groups, dimm_flags, NDTEST_SCM_DIMM_CMD_MASK, 0, NULL); if (!dimm->nvdimm) { dev_err(dev, "Error creating DIMM object for %pOF\n", priv->dn); return -ENXIO; } dimm->dev = device_create_with_groups(&ndtest_dimm_class, &priv->pdev.dev, 0, dimm, dimm_attribute_groups, "test_dimm%d", id); if (!dimm->dev) { pr_err("Could not create dimm device attributes\n"); return -ENOMEM; } return 0; } static int ndtest_nvdimm_init(struct ndtest_priv *p) { struct ndtest_dimm *d; void *res; int i, id; for (i = 0; i < p->config->dimm_count; i++) { d = &p->config->dimms[i]; d->id = id = p->config->dimm_start + i; res = ndtest_alloc_resource(p, LABEL_SIZE, NULL); if (!res) return -ENOMEM; d->label_area = res; sprintf(d->label_area, "label%d", id); d->config_size = LABEL_SIZE; if (!ndtest_alloc_resource(p, d->size, &p->dimm_dma[id])) return -ENOMEM; if (!ndtest_alloc_resource(p, LABEL_SIZE, &p->label_dma[id])) return -ENOMEM; if (!ndtest_alloc_resource(p, LABEL_SIZE, &p->dcr_dma[id])) return -ENOMEM; d->address = p->dimm_dma[id]; ndtest_dimm_register(p, d, id); } return 0; } static ssize_t compatible_show(struct device *dev, struct device_attribute *attr, char *buf) { return sprintf(buf, "nvdimm_test"); } static DEVICE_ATTR_RO(compatible); static struct attribute *of_node_attributes[] = { &dev_attr_compatible.attr, NULL }; static const struct attribute_group of_node_attribute_group = { .name = "of_node", .attrs = of_node_attributes, }; static const struct attribute_group *ndtest_attribute_groups[] = { &of_node_attribute_group, NULL, }; static int ndtest_bus_register(struct ndtest_priv *p) { p->config = &bus_configs[p->pdev.id]; p->bus_desc.ndctl = ndtest_ctl; p->bus_desc.module = THIS_MODULE; p->bus_desc.provider_name = NULL; p->bus_desc.attr_groups = ndtest_attribute_groups; p->bus = nvdimm_bus_register(&p->pdev.dev, &p->bus_desc); if (!p->bus) { dev_err(&p->pdev.dev, "Error creating nvdimm bus %pOF\n", p->dn); return -ENOMEM; } return 0; } static void ndtest_remove(struct platform_device *pdev) { struct ndtest_priv *p = to_ndtest_priv(&pdev->dev); nvdimm_bus_unregister(p->bus); } static int ndtest_probe(struct platform_device *pdev) { struct ndtest_priv *p; int rc; p = to_ndtest_priv(&pdev->dev); if (ndtest_bus_register(p)) return -ENOMEM; p->dcr_dma = devm_kcalloc(&p->pdev.dev, NUM_DCR, sizeof(dma_addr_t), GFP_KERNEL); p->label_dma = devm_kcalloc(&p->pdev.dev, NUM_DCR, sizeof(dma_addr_t), GFP_KERNEL); p->dimm_dma = devm_kcalloc(&p->pdev.dev, NUM_DCR, sizeof(dma_addr_t), GFP_KERNEL); rc = ndtest_nvdimm_init(p); if (rc) goto err; rc = ndtest_init_regions(p); if (rc) goto err; rc = devm_add_action_or_reset(&pdev->dev, put_dimms, p); if (rc) goto err; platform_set_drvdata(pdev, p); return 0; err: pr_err("%s:%d Failed nvdimm init\n", __func__, __LINE__); return rc; } static const struct platform_device_id ndtest_id[] = { { KBUILD_MODNAME }, { }, }; static struct platform_driver ndtest_driver = { .probe = ndtest_probe, .remove = ndtest_remove, .driver = { .name = KBUILD_MODNAME, }, .id_table = ndtest_id, }; static void ndtest_release(struct device *dev) { struct ndtest_priv *p = to_ndtest_priv(dev); kfree(p); } static void cleanup_devices(void) { int i; for (i = 0; i < NUM_INSTANCES; i++) if (instances[i]) platform_device_unregister(&instances[i]->pdev); nfit_test_teardown(); if (ndtest_pool) gen_pool_destroy(ndtest_pool); class_unregister(&ndtest_dimm_class); } static __init int ndtest_init(void) { int rc, i; pmem_test(); libnvdimm_test(); device_dax_test(); dax_pmem_test(); nfit_test_setup(ndtest_resource_lookup, NULL); rc = class_register(&ndtest_dimm_class); if (rc) goto err_register; ndtest_pool = gen_pool_create(ilog2(SZ_4M), NUMA_NO_NODE); if (!ndtest_pool) { rc = -ENOMEM; goto err_register; } if (gen_pool_add(ndtest_pool, SZ_4G, SZ_4G, NUMA_NO_NODE)) { rc = -ENOMEM; goto err_register; } /* Each instance can be taken as a bus, which can have multiple dimms */ for (i = 0; i < NUM_INSTANCES; i++) { struct ndtest_priv *priv; struct platform_device *pdev; priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) { rc = -ENOMEM; goto err_register; } INIT_LIST_HEAD(&priv->resources); pdev = &priv->pdev; pdev->name = KBUILD_MODNAME; pdev->id = i; pdev->dev.release = ndtest_release; rc = platform_device_register(pdev); if (rc) { put_device(&pdev->dev); goto err_register; } get_device(&pdev->dev); instances[i] = priv; } rc = platform_driver_register(&ndtest_driver); if (rc) goto err_register; return 0; err_register: pr_err("Error registering platform device\n"); cleanup_devices(); return rc; } static __exit void ndtest_exit(void) { cleanup_devices(); platform_driver_unregister(&ndtest_driver); } module_init(ndtest_init); module_exit(ndtest_exit); MODULE_DESCRIPTION("Test non-NFIT devices"); MODULE_LICENSE("GPL"); MODULE_AUTHOR("IBM Corporation");