diff options
Diffstat (limited to 'drivers/nvdimm')
| -rw-r--r-- | drivers/nvdimm/Makefile | 3 | ||||
| -rw-r--r-- | drivers/nvdimm/btt.c | 39 | ||||
| -rw-r--r-- | drivers/nvdimm/btt.h | 3 | ||||
| -rw-r--r-- | drivers/nvdimm/btt_devs.c | 55 | ||||
| -rw-r--r-- | drivers/nvdimm/dimm_devs.c | 5 | ||||
| -rw-r--r-- | drivers/nvdimm/e820.c | 86 | ||||
| -rw-r--r-- | drivers/nvdimm/namespace_devs.c | 20 | ||||
| -rw-r--r-- | drivers/nvdimm/nd.h | 1 |
8 files changed, 167 insertions, 45 deletions
diff --git a/drivers/nvdimm/Makefile b/drivers/nvdimm/Makefile index 594bb97c867a..9bf15db52dee 100644 --- a/drivers/nvdimm/Makefile +++ b/drivers/nvdimm/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_LIBNVDIMM) += libnvdimm.o obj-$(CONFIG_BLK_DEV_PMEM) += nd_pmem.o obj-$(CONFIG_ND_BTT) += nd_btt.o obj-$(CONFIG_ND_BLK) += nd_blk.o +obj-$(CONFIG_X86_PMEM_LEGACY) += nd_e820.o nd_pmem-y := pmem.o @@ -9,6 +10,8 @@ nd_btt-y := btt.o nd_blk-y := blk.o +nd_e820-y := e820.o + libnvdimm-y := core.o libnvdimm-y += bus.o libnvdimm-y += dimm_devs.o diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c index 552f1c4f4dc6..19588291550b 100644 --- a/drivers/nvdimm/btt.c +++ b/drivers/nvdimm/btt.c @@ -583,33 +583,6 @@ static void free_arenas(struct btt *btt) } /* - * This function checks if the metadata layout is valid and error free - */ -static int arena_is_valid(struct arena_info *arena, struct btt_sb *super, - u8 *uuid, u32 lbasize) -{ - u64 checksum; - - if (memcmp(super->uuid, uuid, 16)) - return 0; - - checksum = le64_to_cpu(super->checksum); - super->checksum = 0; - if (checksum != nd_btt_sb_checksum(super)) - return 0; - super->checksum = cpu_to_le64(checksum); - - if (lbasize != le32_to_cpu(super->external_lbasize)) - return 0; - - /* TODO: figure out action for this */ - if ((le32_to_cpu(super->flags) & IB_FLAG_ERROR_MASK) != 0) - dev_info(to_dev(arena), "Found arena with an error flag\n"); - - return 1; -} - -/* * This function reads an existing valid btt superblock and * populates the corresponding arena_info struct */ @@ -666,8 +639,7 @@ static int discover_arenas(struct btt *btt) if (ret) goto out; - if (!arena_is_valid(arena, super, btt->nd_btt->uuid, - btt->lbasize)) { + if (!nd_btt_arena_is_valid(btt->nd_btt, super)) { if (remaining == btt->rawsize) { btt->init_state = INIT_NOTFOUND; dev_info(to_dev(arena), "No existing arenas\n"); @@ -756,10 +728,12 @@ static int create_arenas(struct btt *btt) * It is only called for an uninitialized arena when a write * to that arena occurs for the first time. */ -static int btt_arena_write_layout(struct arena_info *arena, u8 *uuid) +static int btt_arena_write_layout(struct arena_info *arena) { int ret; struct btt_sb *super; + struct nd_btt *nd_btt = arena->nd_btt; + const u8 *parent_uuid = nd_dev_to_uuid(&nd_btt->ndns->dev); ret = btt_map_init(arena); if (ret) @@ -774,7 +748,8 @@ static int btt_arena_write_layout(struct arena_info *arena, u8 *uuid) return -ENOMEM; strncpy(super->signature, BTT_SIG, BTT_SIG_LEN); - memcpy(super->uuid, uuid, 16); + memcpy(super->uuid, nd_btt->uuid, 16); + memcpy(super->parent_uuid, parent_uuid, 16); super->flags = cpu_to_le32(arena->flags); super->version_major = cpu_to_le16(arena->version_major); super->version_minor = cpu_to_le16(arena->version_minor); @@ -814,7 +789,7 @@ static int btt_meta_init(struct btt *btt) mutex_lock(&btt->init_lock); list_for_each_entry(arena, &btt->arena_list, list) { - ret = btt_arena_write_layout(arena, btt->nd_btt->uuid); + ret = btt_arena_write_layout(arena); if (ret) goto unlock; diff --git a/drivers/nvdimm/btt.h b/drivers/nvdimm/btt.h index 75b0d80a6bd9..b2f8651e5395 100644 --- a/drivers/nvdimm/btt.h +++ b/drivers/nvdimm/btt.h @@ -182,4 +182,7 @@ struct btt { int init_state; int num_arenas; }; + +bool nd_btt_arena_is_valid(struct nd_btt *nd_btt, struct btt_sb *super); + #endif diff --git a/drivers/nvdimm/btt_devs.c b/drivers/nvdimm/btt_devs.c index 6ac8c0fea3ec..242ae1c550ad 100644 --- a/drivers/nvdimm/btt_devs.c +++ b/drivers/nvdimm/btt_devs.c @@ -342,6 +342,51 @@ struct device *nd_btt_create(struct nd_region *nd_region) return dev; } +static bool uuid_is_null(u8 *uuid) +{ + static const u8 null_uuid[16]; + + return (memcmp(uuid, null_uuid, 16) == 0); +} + +/** + * nd_btt_arena_is_valid - check if the metadata layout is valid + * @nd_btt: device with BTT geometry and backing device info + * @super: pointer to the arena's info block being tested + * + * Check consistency of the btt info block with itself by validating + * the checksum, and with the parent namespace by verifying the + * parent_uuid contained in the info block with the one supplied in. + * + * Returns: + * false for an invalid info block, true for a valid one + */ +bool nd_btt_arena_is_valid(struct nd_btt *nd_btt, struct btt_sb *super) +{ + const u8 *parent_uuid = nd_dev_to_uuid(&nd_btt->ndns->dev); + u64 checksum; + + if (memcmp(super->signature, BTT_SIG, BTT_SIG_LEN) != 0) + return false; + + if (!uuid_is_null(super->parent_uuid)) + if (memcmp(super->parent_uuid, parent_uuid, 16) != 0) + return false; + + checksum = le64_to_cpu(super->checksum); + super->checksum = 0; + if (checksum != nd_btt_sb_checksum(super)) + return false; + super->checksum = cpu_to_le64(checksum); + + /* TODO: figure out action for this */ + if ((le32_to_cpu(super->flags) & IB_FLAG_ERROR_MASK) != 0) + dev_info(&nd_btt->dev, "Found arena with an error flag\n"); + + return true; +} +EXPORT_SYMBOL(nd_btt_arena_is_valid); + /* * nd_btt_sb_checksum: compute checksum for btt info block * @@ -364,8 +409,6 @@ EXPORT_SYMBOL(nd_btt_sb_checksum); static int __nd_btt_probe(struct nd_btt *nd_btt, struct nd_namespace_common *ndns, struct btt_sb *btt_sb) { - u64 checksum; - if (!btt_sb || !ndns || !nd_btt) return -ENODEV; @@ -375,14 +418,8 @@ static int __nd_btt_probe(struct nd_btt *nd_btt, if (nvdimm_namespace_capacity(ndns) < SZ_16M) return -ENXIO; - if (memcmp(btt_sb->signature, BTT_SIG, BTT_SIG_LEN) != 0) - return -ENODEV; - - checksum = le64_to_cpu(btt_sb->checksum); - btt_sb->checksum = 0; - if (checksum != nd_btt_sb_checksum(btt_sb)) + if (!nd_btt_arena_is_valid(nd_btt, btt_sb)) return -ENODEV; - btt_sb->checksum = cpu_to_le64(checksum); nd_btt->lbasize = le32_to_cpu(btt_sb->external_lbasize); nd_btt->uuid = kmemdup(btt_sb->uuid, 16, GFP_KERNEL); diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c index c05eb807d674..651b8d19d324 100644 --- a/drivers/nvdimm/dimm_devs.c +++ b/drivers/nvdimm/dimm_devs.c @@ -241,10 +241,7 @@ void nvdimm_drvdata_release(struct kref *kref) nvdimm_free_dpa(ndd, res); nvdimm_bus_unlock(dev); - if (ndd->data && is_vmalloc_addr(ndd->data)) - vfree(ndd->data); - else - kfree(ndd->data); + kvfree(ndd->data); kfree(ndd); put_device(dev); } diff --git a/drivers/nvdimm/e820.c b/drivers/nvdimm/e820.c new file mode 100644 index 000000000000..1b5743ad92db --- /dev/null +++ b/drivers/nvdimm/e820.c @@ -0,0 +1,86 @@ +/* + * Copyright (c) 2015, Christoph Hellwig. + * Copyright (c) 2015, Intel Corporation. + */ +#include <linux/platform_device.h> +#include <linux/libnvdimm.h> +#include <linux/module.h> + +static const struct attribute_group *e820_pmem_attribute_groups[] = { + &nvdimm_bus_attribute_group, + NULL, +}; + +static const struct attribute_group *e820_pmem_region_attribute_groups[] = { + &nd_region_attribute_group, + &nd_device_attribute_group, + NULL, +}; + +static int e820_pmem_remove(struct platform_device *pdev) +{ + struct nvdimm_bus *nvdimm_bus = platform_get_drvdata(pdev); + + nvdimm_bus_unregister(nvdimm_bus); + return 0; +} + +static int e820_pmem_probe(struct platform_device *pdev) +{ + static struct nvdimm_bus_descriptor nd_desc; + struct device *dev = &pdev->dev; + struct nvdimm_bus *nvdimm_bus; + struct resource *p; + + nd_desc.attr_groups = e820_pmem_attribute_groups; + nd_desc.provider_name = "e820"; + nvdimm_bus = nvdimm_bus_register(dev, &nd_desc); + if (!nvdimm_bus) + goto err; + platform_set_drvdata(pdev, nvdimm_bus); + + for (p = iomem_resource.child; p ; p = p->sibling) { + struct nd_region_desc ndr_desc; + + if (strncmp(p->name, "Persistent Memory (legacy)", 26) != 0) + continue; + + memset(&ndr_desc, 0, sizeof(ndr_desc)); + ndr_desc.res = p; + ndr_desc.attr_groups = e820_pmem_region_attribute_groups; + ndr_desc.numa_node = NUMA_NO_NODE; + if (!nvdimm_pmem_region_create(nvdimm_bus, &ndr_desc)) + goto err; + } + + return 0; + + err: + nvdimm_bus_unregister(nvdimm_bus); + dev_err(dev, "failed to register legacy persistent memory ranges\n"); + return -ENXIO; +} + +static struct platform_driver e820_pmem_driver = { + .probe = e820_pmem_probe, + .remove = e820_pmem_remove, + .driver = { + .name = "e820_pmem", + }, +}; + +static __init int e820_pmem_init(void) +{ + return platform_driver_register(&e820_pmem_driver); +} + +static __exit void e820_pmem_exit(void) +{ + platform_driver_unregister(&e820_pmem_driver); +} + +MODULE_ALIAS("platform:e820_pmem*"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Intel Corporation"); +module_init(e820_pmem_init); +module_exit(e820_pmem_exit); diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index fef0dd80d4ad..b18ffea9d85b 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -100,6 +100,26 @@ const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, } EXPORT_SYMBOL(nvdimm_namespace_disk_name); +const u8 *nd_dev_to_uuid(struct device *dev) +{ + static const u8 null_uuid[16]; + + if (!dev) + return null_uuid; + + if (is_namespace_pmem(dev)) { + struct nd_namespace_pmem *nspm = to_nd_namespace_pmem(dev); + + return nspm->uuid; + } else if (is_namespace_blk(dev)) { + struct nd_namespace_blk *nsblk = to_nd_namespace_blk(dev); + + return nsblk->uuid; + } else + return null_uuid; +} +EXPORT_SYMBOL(nd_dev_to_uuid); + static ssize_t nstype_show(struct device *dev, struct device_attribute *attr, char *buf) { diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index 835263e47bb8..f9615824947b 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -217,4 +217,5 @@ static inline bool nd_iostat_start(struct bio *bio, unsigned long *start) } void nd_iostat_end(struct bio *bio, unsigned long start); resource_size_t nd_namespace_blk_validate(struct nd_namespace_blk *nsblk); +const u8 *nd_dev_to_uuid(struct device *dev); #endif /* __ND_H__ */ |