diff options
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/Kconfig | 27 | ||||
| -rw-r--r-- | drivers/acpi/Makefile | 2 | ||||
| -rw-r--r-- | drivers/acpi/nfit/Kconfig | 26 | ||||
| -rw-r--r-- | drivers/acpi/nfit/Makefile | 3 | ||||
| -rw-r--r-- | drivers/acpi/nfit/core.c (renamed from drivers/acpi/nfit.c) | 647 | ||||
| -rw-r--r-- | drivers/acpi/nfit/mce.c | 89 | ||||
| -rw-r--r-- | drivers/acpi/nfit/nfit.h (renamed from drivers/acpi/nfit.h) | 60 |
7 files changed, 511 insertions, 343 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index b7e2e776397d..415b148a8698 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -447,32 +447,7 @@ config ACPI_REDUCED_HARDWARE_ONLY If you are unsure what to do, do not enable this option. -config ACPI_NFIT - tristate "ACPI NVDIMM Firmware Interface Table (NFIT)" - depends on PHYS_ADDR_T_64BIT - depends on BLK_DEV - depends on ARCH_HAS_MMIO_FLUSH - select LIBNVDIMM - help - Infrastructure to probe ACPI 6 compliant platforms for - NVDIMMs (NFIT) and register a libnvdimm device tree. In - addition to storage devices this also enables libnvdimm to pass - ACPI._DSM messages for platform/dimm configuration. - - To compile this driver as a module, choose M here: - the module will be called nfit. - -config ACPI_NFIT_DEBUG - bool "NFIT DSM debug" - depends on ACPI_NFIT - depends on DYNAMIC_DEBUG - default n - help - Enabling this option causes the nfit driver to dump the - input and output buffers of _DSM operations on the ACPI0012 - device and its children. This can be very verbose, so leave - it disabled unless you are debugging a hardware / firmware - issue. +source "drivers/acpi/nfit/Kconfig" source "drivers/acpi/apei/Kconfig" diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index 251ce85a66fb..64a575a6f7ef 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -70,7 +70,7 @@ obj-$(CONFIG_ACPI_PCI_SLOT) += pci_slot.o obj-$(CONFIG_ACPI_PROCESSOR) += processor.o obj-$(CONFIG_ACPI) += container.o obj-$(CONFIG_ACPI_THERMAL) += thermal.o -obj-$(CONFIG_ACPI_NFIT) += nfit.o +obj-$(CONFIG_ACPI_NFIT) += nfit/ obj-$(CONFIG_ACPI) += acpi_memhotplug.o obj-$(CONFIG_ACPI_HOTPLUG_IOAPIC) += ioapic.o obj-$(CONFIG_ACPI_BATTERY) += battery.o diff --git a/drivers/acpi/nfit/Kconfig b/drivers/acpi/nfit/Kconfig new file mode 100644 index 000000000000..dd0d53c52552 --- /dev/null +++ b/drivers/acpi/nfit/Kconfig @@ -0,0 +1,26 @@ +config ACPI_NFIT + tristate "ACPI NVDIMM Firmware Interface Table (NFIT)" + depends on PHYS_ADDR_T_64BIT + depends on BLK_DEV + depends on ARCH_HAS_MMIO_FLUSH + select LIBNVDIMM + help + Infrastructure to probe ACPI 6 compliant platforms for + NVDIMMs (NFIT) and register a libnvdimm device tree. In + addition to storage devices this also enables libnvdimm to pass + ACPI._DSM messages for platform/dimm configuration. + + To compile this driver as a module, choose M here: + the module will be called nfit. + +config ACPI_NFIT_DEBUG + bool "NFIT DSM debug" + depends on ACPI_NFIT + depends on DYNAMIC_DEBUG + default n + help + Enabling this option causes the nfit driver to dump the + input and output buffers of _DSM operations on the ACPI0012 + device and its children. This can be very verbose, so leave + it disabled unless you are debugging a hardware / firmware + issue. diff --git a/drivers/acpi/nfit/Makefile b/drivers/acpi/nfit/Makefile new file mode 100644 index 000000000000..a407e769f103 --- /dev/null +++ b/drivers/acpi/nfit/Makefile @@ -0,0 +1,3 @@ +obj-$(CONFIG_ACPI_NFIT) := nfit.o +nfit-y := core.o +nfit-$(CONFIG_X86_MCE) += mce.o diff --git a/drivers/acpi/nfit.c b/drivers/acpi/nfit/core.c index 1f0e06065ae6..8c234dd9b8bc 100644 --- a/drivers/acpi/nfit.c +++ b/drivers/acpi/nfit/core.c @@ -15,6 +15,7 @@ #include <linux/module.h> #include <linux/mutex.h> #include <linux/ndctl.h> +#include <linux/sysfs.h> #include <linux/delay.h> #include <linux/list.h> #include <linux/acpi.h> @@ -50,6 +51,9 @@ module_param(disable_vendor_specific, bool, S_IRUGO); MODULE_PARM_DESC(disable_vendor_specific, "Limit commands to the publicly specified set\n"); +LIST_HEAD(acpi_descs); +DEFINE_MUTEX(acpi_desc_lock); + static struct workqueue_struct *nfit_wq; struct nfit_table_prev { @@ -360,7 +364,7 @@ static const char *spa_type_name(u16 type) return to_name[type]; } -static int nfit_spa_type(struct acpi_nfit_system_address *spa) +int nfit_spa_type(struct acpi_nfit_system_address *spa) { int i; @@ -374,22 +378,25 @@ static bool add_spa(struct acpi_nfit_desc *acpi_desc, struct nfit_table_prev *prev, struct acpi_nfit_system_address *spa) { - size_t length = min_t(size_t, sizeof(*spa), spa->header.length); struct device *dev = acpi_desc->dev; struct nfit_spa *nfit_spa; + if (spa->header.length != sizeof(*spa)) + return false; + list_for_each_entry(nfit_spa, &prev->spas, list) { - if (memcmp(nfit_spa->spa, spa, length) == 0) { + if (memcmp(nfit_spa->spa, spa, sizeof(*spa)) == 0) { list_move_tail(&nfit_spa->list, &acpi_desc->spas); return true; } } - nfit_spa = devm_kzalloc(dev, sizeof(*nfit_spa), GFP_KERNEL); + nfit_spa = devm_kzalloc(dev, sizeof(*nfit_spa) + sizeof(*spa), + GFP_KERNEL); if (!nfit_spa) return false; INIT_LIST_HEAD(&nfit_spa->list); - nfit_spa->spa = spa; + memcpy(nfit_spa->spa, spa, sizeof(*spa)); list_add_tail(&nfit_spa->list, &acpi_desc->spas); dev_dbg(dev, "%s: spa index: %d type: %s\n", __func__, spa->range_index, @@ -401,21 +408,24 @@ static bool add_memdev(struct acpi_nfit_desc *acpi_desc, struct nfit_table_prev *prev, struct acpi_nfit_memory_map *memdev) { - size_t length = min_t(size_t, sizeof(*memdev), memdev->header.length); struct device *dev = acpi_desc->dev; struct nfit_memdev *nfit_memdev; + if (memdev->header.length != sizeof(*memdev)) + return false; + list_for_each_entry(nfit_memdev, &prev->memdevs, list) - if (memcmp(nfit_memdev->memdev, memdev, length) == 0) { + if (memcmp(nfit_memdev->memdev, memdev, sizeof(*memdev)) == 0) { list_move_tail(&nfit_memdev->list, &acpi_desc->memdevs); return true; } - nfit_memdev = devm_kzalloc(dev, sizeof(*nfit_memdev), GFP_KERNEL); + nfit_memdev = devm_kzalloc(dev, sizeof(*nfit_memdev) + sizeof(*memdev), + GFP_KERNEL); if (!nfit_memdev) return false; INIT_LIST_HEAD(&nfit_memdev->list); - nfit_memdev->memdev = memdev; + memcpy(nfit_memdev->memdev, memdev, sizeof(*memdev)); list_add_tail(&nfit_memdev->list, &acpi_desc->memdevs); dev_dbg(dev, "%s: memdev handle: %#x spa: %d dcr: %d\n", __func__, memdev->device_handle, memdev->range_index, @@ -423,25 +433,42 @@ static bool add_memdev(struct acpi_nfit_desc *acpi_desc, return true; } +/* + * An implementation may provide a truncated control region if no block windows + * are defined. + */ +static size_t sizeof_dcr(struct acpi_nfit_control_region *dcr) +{ + if (dcr->header.length < offsetof(struct acpi_nfit_control_region, + window_size)) + return 0; + if (dcr->windows) + return sizeof(*dcr); + return offsetof(struct acpi_nfit_control_region, window_size); +} + static bool add_dcr(struct acpi_nfit_desc *acpi_desc, struct nfit_table_prev *prev, struct acpi_nfit_control_region *dcr) { - size_t length = min_t(size_t, sizeof(*dcr), dcr->header.length); struct device *dev = acpi_desc->dev; struct nfit_dcr *nfit_dcr; + if (!sizeof_dcr(dcr)) + return false; + list_for_each_entry(nfit_dcr, &prev->dcrs, list) - if (memcmp(nfit_dcr->dcr, dcr, length) == 0) { + if (memcmp(nfit_dcr->dcr, dcr, sizeof_dcr(dcr)) == 0) { list_move_tail(&nfit_dcr->list, &acpi_desc->dcrs); return true; } - nfit_dcr = devm_kzalloc(dev, sizeof(*nfit_dcr), GFP_KERNEL); + nfit_dcr = devm_kzalloc(dev, sizeof(*nfit_dcr) + sizeof(*dcr), + GFP_KERNEL); if (!nfit_dcr) return false; INIT_LIST_HEAD(&nfit_dcr->list); - nfit_dcr->dcr = dcr; + memcpy(nfit_dcr->dcr, dcr, sizeof_dcr(dcr)); list_add_tail(&nfit_dcr->list, &acpi_desc->dcrs); dev_dbg(dev, "%s: dcr index: %d windows: %d\n", __func__, dcr->region_index, dcr->windows); @@ -452,71 +479,102 @@ static bool add_bdw(struct acpi_nfit_desc *acpi_desc, struct nfit_table_prev *prev, struct acpi_nfit_data_region *bdw) { - size_t length = min_t(size_t, sizeof(*bdw), bdw->header.length); struct device *dev = acpi_desc->dev; struct nfit_bdw *nfit_bdw; + if (bdw->header.length != sizeof(*bdw)) + return false; list_for_each_entry(nfit_bdw, &prev->bdws, list) - if (memcmp(nfit_bdw->bdw, bdw, length) == 0) { + if (memcmp(nfit_bdw->bdw, bdw, sizeof(*bdw)) == 0) { list_move_tail(&nfit_bdw->list, &acpi_desc->bdws); return true; } - nfit_bdw = devm_kzalloc(dev, sizeof(*nfit_bdw), GFP_KERNEL); + nfit_bdw = devm_kzalloc(dev, sizeof(*nfit_bdw) + sizeof(*bdw), + GFP_KERNEL); if (!nfit_bdw) return false; INIT_LIST_HEAD(&nfit_bdw->list); - nfit_bdw->bdw = bdw; + memcpy(nfit_bdw->bdw, bdw, sizeof(*bdw)); list_add_tail(&nfit_bdw->list, &acpi_desc->bdws); dev_dbg(dev, "%s: bdw dcr: %d windows: %d\n", __func__, bdw->region_index, bdw->windows); return true; } +static size_t sizeof_idt(struct acpi_nfit_interleave *idt) +{ + if (idt->header.length < sizeof(*idt)) + return 0; + return sizeof(*idt) + sizeof(u32) * (idt->line_count - 1); +} + static bool add_idt(struct acpi_nfit_desc *acpi_desc, struct nfit_table_prev *prev, struct acpi_nfit_interleave *idt) { - size_t length = min_t(size_t, sizeof(*idt), idt->header.length); struct device *dev = acpi_desc->dev; struct nfit_idt *nfit_idt; - list_for_each_entry(nfit_idt, &prev->idts, list) - if (memcmp(nfit_idt->idt, idt, length) == 0) { + if (!sizeof_idt(idt)) + return false; + + list_for_each_entry(nfit_idt, &prev->idts, list) { + if (sizeof_idt(nfit_idt->idt) != sizeof_idt(idt)) + continue; + + if (memcmp(nfit_idt->idt, idt, sizeof_idt(idt)) == 0) { list_move_tail(&nfit_idt->list, &acpi_desc->idts); return true; } + } - nfit_idt = devm_kzalloc(dev, sizeof(*nfit_idt), GFP_KERNEL); + nfit_idt = devm_kzalloc(dev, sizeof(*nfit_idt) + sizeof_idt(idt), + GFP_KERNEL); if (!nfit_idt) return false; INIT_LIST_HEAD(&nfit_idt->list); - nfit_idt->idt = idt; + memcpy(nfit_idt->idt, idt, sizeof_idt(idt)); list_add_tail(&nfit_idt->list, &acpi_desc->idts); dev_dbg(dev, "%s: idt index: %d num_lines: %d\n", __func__, idt->interleave_index, idt->line_count); return true; } +static size_t sizeof_flush(struct acpi_nfit_flush_address *flush) +{ + if (flush->header.length < sizeof(*flush)) + return 0; + return sizeof(*flush) + sizeof(u64) * (flush->hint_count - 1); +} + static bool add_flush(struct acpi_nfit_desc *acpi_desc, struct nfit_table_prev *prev, struct acpi_nfit_flush_address *flush) { - size_t length = min_t(size_t, sizeof(*flush), flush->header.length); struct device *dev = acpi_desc->dev; struct nfit_flush *nfit_flush; - list_for_each_entry(nfit_flush, &prev->flushes, list) - if (memcmp(nfit_flush->flush, flush, length) == 0) { + if (!sizeof_flush(flush)) + return false; + + list_for_each_entry(nfit_flush, &prev->flushes, list) { + if (sizeof_flush(nfit_flush->flush) != sizeof_flush(flush)) + continue; + + if (memcmp(nfit_flush->flush, flush, + sizeof_flush(flush)) == 0) { list_move_tail(&nfit_flush->list, &acpi_desc->flushes); return true; } + } - nfit_flush = devm_kzalloc(dev, sizeof(*nfit_flush), GFP_KERNEL); + nfit_flush = devm_kzalloc(dev, sizeof(*nfit_flush) + + sizeof_flush(flush), GFP_KERNEL); if (!nfit_flush) return false; INIT_LIST_HEAD(&nfit_flush->list); - nfit_flush->flush = flush; + memcpy(nfit_flush->flush, flush, sizeof_flush(flush)); list_add_tail(&nfit_flush->list, &acpi_desc->flushes); dev_dbg(dev, "%s: nfit_flush handle: %d hint_count: %d\n", __func__, flush->device_handle, flush->hint_count); @@ -614,7 +672,6 @@ static void nfit_mem_init_bdw(struct acpi_nfit_desc *acpi_desc, { u16 dcr = __to_nfit_memdev(nfit_mem)->region_index; struct nfit_memdev *nfit_memdev; - struct nfit_flush *nfit_flush; struct nfit_bdw *nfit_bdw; struct nfit_idt *nfit_idt; u16 idt_idx, range_index; @@ -647,14 +704,6 @@ static void nfit_mem_init_bdw(struct acpi_nfit_desc *acpi_desc, nfit_mem->idt_bdw = nfit_idt->idt; break; } - - list_for_each_entry(nfit_flush, &acpi_desc->flushes, list) { - if (nfit_flush->flush->device_handle != - nfit_memdev->memdev->device_handle) - continue; - nfit_mem->nfit_flush = nfit_flush; - break; - } break; } } @@ -675,6 +724,7 @@ static int nfit_mem_dcr_init(struct acpi_nfit_desc *acpi_desc, } list_for_each_entry(nfit_memdev, &acpi_desc->memdevs, list) { + struct nfit_flush *nfit_flush; struct nfit_dcr *nfit_dcr; u32 device_handle; u16 dcr; @@ -721,6 +771,28 @@ static int nfit_mem_dcr_init(struct acpi_nfit_desc *acpi_desc, break; } + list_for_each_entry(nfit_flush, &acpi_desc->flushes, list) { + struct acpi_nfit_flush_address *flush; + u16 i; + + if (nfit_flush->flush->device_handle != device_handle) + continue; + nfit_mem->nfit_flush = nfit_flush; + flush = nfit_flush->flush; + nfit_mem->flush_wpq = devm_kzalloc(acpi_desc->dev, + flush->hint_count + * sizeof(struct resource), GFP_KERNEL); + if (!nfit_mem->flush_wpq) + return -ENOMEM; + for (i = 0; i < flush->hint_count; i++) { + struct resource *res = &nfit_mem->flush_wpq[i]; + + res->start = flush->hint_address[i]; + res->end = res->start + 8 - 1; + } + break; + } + if (dcr && !nfit_mem->dcr) { dev_err(acpi_desc->dev, "SPA %d missing DCR %d\n", spa->range_index, dcr); @@ -806,14 +878,85 @@ static ssize_t revision_show(struct device *dev, } static DEVICE_ATTR_RO(revision); +/* + * This shows the number of full Address Range Scrubs that have been + * completed since driver load time. Userspace can wait on this using + * select/poll etc. A '+' at the end indicates an ARS is in progress + */ +static ssize_t scrub_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct nvdimm_bus_descriptor *nd_desc; + ssize_t rc = -ENXIO; + + device_lock(dev); + nd_desc = dev_get_drvdata(dev); + if (nd_desc) { + struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc); + + rc = sprintf(buf, "%d%s", acpi_desc->scrub_count, + (work_busy(&acpi_desc->work)) ? "+\n" : "\n"); + } + device_unlock(dev); + return rc; +} + +static ssize_t scrub_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + struct nvdimm_bus_descriptor *nd_desc; + ssize_t rc; + long val; + + rc = kstrtol(buf, 0, &val); + if (rc) + return rc; + if (val != 1) + return -EINVAL; + + device_lock(dev); + nd_desc = dev_get_drvdata(dev); + if (nd_desc) { + struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc); + + rc = acpi_nfit_ars_rescan(acpi_desc); + } + device_unlock(dev); + if (rc) + return rc; + return size; +} +static DEVICE_ATTR_RW(scrub); + +static bool ars_supported(struct nvdimm_bus *nvdimm_bus) +{ + struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus); + const unsigned long mask = 1 << ND_CMD_ARS_CAP | 1 << ND_CMD_ARS_START + | 1 << ND_CMD_ARS_STATUS; + + return (nd_desc->cmd_mask & mask) == mask; +} + +static umode_t nfit_visible(struct kobject *kobj, struct attribute *a, int n) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev); + + if (a == &dev_attr_scrub.attr && !ars_supported(nvdimm_bus)) + return 0; + return a->mode; +} + static struct attribute *acpi_nfit_attributes[] = { &dev_attr_revision.attr, + &dev_attr_scrub.attr, NULL, }; static struct attribute_group acpi_nfit_attribute_group = { .name = "nfit", .attrs = acpi_nfit_attributes, + .is_visible = nfit_visible, }; static const struct attribute_group *acpi_nfit_attribute_groups[] = { @@ -1130,11 +1273,11 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc, } /* - * Until standardization materializes we need to consider up to 3 + * Until standardization materializes we need to consider 4 * different command sets. Note, that checking for function0 (bit0) * tells us if any commands are reachable through this uuid. */ - for (i = NVDIMM_FAMILY_INTEL; i <= NVDIMM_FAMILY_HPE2; i++) + for (i = NVDIMM_FAMILY_INTEL; i <= NVDIMM_FAMILY_MSFT; i++) if (acpi_check_dsm(adev_dimm->handle, to_nfit_uuid(i), 1, 1)) break; @@ -1144,12 +1287,14 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc, dsm_mask = 0x3fe; if (disable_vendor_specific) dsm_mask &= ~(1 << ND_CMD_VENDOR); - } else if (nfit_mem->family == NVDIMM_FAMILY_HPE1) + } else if (nfit_mem->family == NVDIMM_FAMILY_HPE1) { dsm_mask = 0x1c3c76; - else if (nfit_mem->family == NVDIMM_FAMILY_HPE2) { + } else if (nfit_mem->family == NVDIMM_FAMILY_HPE2) { dsm_mask = 0x1fe; if (disable_vendor_specific) dsm_mask &= ~(1 << 8); + } else if (nfit_mem->family == NVDIMM_FAMILY_MSFT) { + dsm_mask = 0xffffffff; } else { dev_dbg(dev, "unknown dimm command family\n"); nfit_mem->family = -1; @@ -1171,6 +1316,7 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc) int dimm_count = 0; list_for_each_entry(nfit_mem, &acpi_desc->dimms, list) { + struct acpi_nfit_flush_address *flush; unsigned long flags = 0, cmd_mask; struct nvdimm *nvdimm; u32 device_handle; @@ -1204,9 +1350,12 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc) if (nfit_mem->family == NVDIMM_FAMILY_INTEL) cmd_mask |= nfit_mem->dsm_mask; + flush = nfit_mem->nfit_flush ? nfit_mem->nfit_flush->flush + : NULL; nvdimm = nvdimm_create(acpi_desc->nvdimm_bus, nfit_mem, acpi_nfit_dimm_attribute_groups, - flags, cmd_mask); + flags, cmd_mask, flush ? flush->hint_count : 0, + nfit_mem->flush_wpq); if (!nvdimm) return -ENOMEM; @@ -1374,24 +1523,6 @@ static u64 to_interleave_offset(u64 offset, struct nfit_blk_mmio *mmio) return mmio->base_offset + line_offset + table_offset + sub_line_offset; } -static void wmb_blk(struct nfit_blk *nfit_blk) -{ - - if (nfit_blk->nvdimm_flush) { - /* - * The first wmb() is needed to 'sfence' all previous writes - * such that they are architecturally visible for the platform - * buffer flush. Note that we've already arranged for pmem - * writes to avoid the cache via arch_memcpy_to_pmem(). The - * final wmb() ensures ordering for the NVDIMM flush write. - */ - wmb(); - writeq(1, nfit_blk->nvdimm_flush); - wmb(); - } else - wmb_pmem(); -} - static u32 read_blk_stat(struct nfit_blk *nfit_blk, unsigned int bw) { struct nfit_blk_mmio *mmio = &nfit_blk->mmio[DCR]; @@ -1426,7 +1557,7 @@ static void write_blk_ctl(struct nfit_blk *nfit_blk, unsigned int bw, offset = to_interleave_offset(offset, mmio); writeq(cmd, mmio->addr.base + offset); - wmb_blk(nfit_blk); + nvdimm_flush(nfit_blk->nd_region); if (nfit_blk->dimm_flags & NFIT_BLK_DCR_LATCH) readq(mmio->addr.base + offset); @@ -1477,7 +1608,7 @@ static int acpi_nfit_blk_single_io(struct nfit_blk *nfit_blk, } if (rw) - wmb_blk(nfit_blk); + nvdimm_flush(nfit_blk->nd_region); rc = read_blk_stat(nfit_blk, lane) ? -EIO : 0; return rc; @@ -1509,125 +1640,6 @@ static int acpi_nfit_blk_region_do_io(struct nd_blk_region *ndbr, return rc; } -static void nfit_spa_mapping_release(struct kref *kref) -{ - struct nfit_spa_mapping *spa_map = to_spa_map(kref); - struct acpi_nfit_system_address *spa = spa_map->spa; - struct acpi_nfit_desc *acpi_desc = spa_map->acpi_desc; - - WARN_ON(!mutex_is_locked(&acpi_desc->spa_map_mutex)); - dev_dbg(acpi_desc->dev, "%s: SPA%d\n", __func__, spa->range_index); - if (spa_map->type == SPA_MAP_APERTURE) - memunmap((void __force *)spa_map->addr.aperture); - else - iounmap(spa_map->addr.base); - release_mem_region(spa->address, spa->length); - list_del(&spa_map->list); - kfree(spa_map); -} - -static struct nfit_spa_mapping *find_spa_mapping( - struct acpi_nfit_desc *acpi_desc, - struct acpi_nfit_system_address *spa) -{ - struct nfit_spa_mapping *spa_map; - - WARN_ON(!mutex_is_locked(&acpi_desc->spa_map_mutex)); - list_for_each_entry(spa_map, &acpi_desc->spa_maps, list) - if (spa_map->spa == spa) - return spa_map; - - return NULL; -} - -static void nfit_spa_unmap(struct acpi_nfit_desc *acpi_desc, - struct acpi_nfit_system_address *spa) -{ - struct nfit_spa_mapping *spa_map; - - mutex_lock(&acpi_desc->spa_map_mutex); - spa_map = find_spa_mapping(acpi_desc, spa); - - if (spa_map) - kref_put(&spa_map->kref, nfit_spa_mapping_release); - mutex_unlock(&acpi_desc->spa_map_mutex); -} - -static void __iomem *__nfit_spa_map(struct acpi_nfit_desc *acpi_desc, - struct acpi_nfit_system_address *spa, enum spa_map_type type) -{ - resource_size_t start = spa->address; - resource_size_t n = spa->length; - struct nfit_spa_mapping *spa_map; - struct resource *res; - - WARN_ON(!mutex_is_locked(&acpi_desc->spa_map_mutex)); - - spa_map = find_spa_mapping(acpi_desc, spa); - if (spa_map) { - kref_get(&spa_map->kref); - return spa_map->addr.base; - } - - spa_map = kzalloc(sizeof(*spa_map), GFP_KERNEL); - if (!spa_map) - return NULL; - - INIT_LIST_HEAD(&spa_map->list); - spa_map->spa = spa; - kref_init(&spa_map->kref); - spa_map->acpi_desc = acpi_desc; - - res = request_mem_region(start, n, dev_name(acpi_desc->dev)); - if (!res) - goto err_mem; - - spa_map->type = type; - if (type == SPA_MAP_APERTURE) - spa_map->addr.aperture = (void __pmem *)memremap(start, n, - ARCH_MEMREMAP_PMEM); - else - spa_map->addr.base = ioremap_nocache(start, n); - - - if (!spa_map->addr.base) - goto err_map; - - list_add_tail(&spa_map->list, &acpi_desc->spa_maps); - return spa_map->addr.base; - - err_map: - release_mem_region(start, n); - err_mem: - kfree(spa_map); - return NULL; -} - -/** - * nfit_spa_map - interleave-aware managed-mappings of acpi_nfit_system_address ranges - * @nvdimm_bus: NFIT-bus that provided the spa table entry - * @nfit_spa: spa table to map - * @type: aperture or control region - * - * In the case where block-data-window apertures and - * dimm-control-regions are interleaved they will end up sharing a - * single request_mem_region() + ioremap() for the address range. In - * the style of devm nfit_spa_map() mappings are automatically dropped - * when all region devices referencing the same mapping are disabled / - * unbound. - */ -static void __iomem *nfit_spa_map(struct acpi_nfit_desc *acpi_desc, - struct acpi_nfit_system_address *spa, enum spa_map_type type) -{ - void __iomem *iomem; - - mutex_lock(&acpi_desc->spa_map_mutex); - iomem = __nfit_spa_map(acpi_desc, spa, type); - mutex_unlock(&acpi_desc->spa_map_mutex); - - return iomem; -} - static int nfit_blk_init_interleave(struct nfit_blk_mmio *mmio, struct acpi_nfit_interleave *idt, u16 interleave_ways) { @@ -1669,9 +1681,7 @@ static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus, struct device *dev) { struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus); - struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc); struct nd_blk_region *ndbr = to_nd_blk_region(dev); - struct nfit_flush *nfit_flush; struct nfit_blk_mmio *mmio; struct nfit_blk *nfit_blk; struct nfit_mem *nfit_mem; @@ -1697,8 +1707,8 @@ static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus, /* map block aperture memory */ nfit_blk->bdw_offset = nfit_mem->bdw->offset; mmio = &nfit_blk->mmio[BDW]; - mmio->addr.base = nfit_spa_map(acpi_desc, nfit_mem->spa_bdw, - SPA_MAP_APERTURE); + mmio->addr.base = devm_nvdimm_memremap(dev, nfit_mem->spa_bdw->address, + nfit_mem->spa_bdw->length, ARCH_MEMREMAP_PMEM); if (!mmio->addr.base) { dev_dbg(dev, "%s: %s failed to map bdw\n", __func__, nvdimm_name(nvdimm)); @@ -1720,8 +1730,8 @@ static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus, nfit_blk->cmd_offset = nfit_mem->dcr->command_offset; nfit_blk->stat_offset = nfit_mem->dcr->status_offset; mmio = &nfit_blk->mmio[DCR]; - mmio->addr.base = nfit_spa_map(acpi_desc, nfit_mem->spa_dcr, - SPA_MAP_CONTROL); + mmio->addr.base = devm_nvdimm_ioremap(dev, nfit_mem->spa_dcr->address, + nfit_mem->spa_dcr->length); if (!mmio->addr.base) { dev_dbg(dev, "%s: %s failed to map dcr\n", __func__, nvdimm_name(nvdimm)); @@ -1746,15 +1756,7 @@ static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus, return rc; } - nfit_flush = nfit_mem->nfit_flush; - if (nfit_flush && nfit_flush->flush->hint_count != 0) { - nfit_blk->nvdimm_flush = devm_ioremap_nocache(dev, - nfit_flush->flush->hint_address[0], 8); - if (!nfit_blk->nvdimm_flush) - return -ENOMEM; - } - - if (!arch_has_wmb_pmem() && !nfit_blk->nvdimm_flush) + if (nvdimm_has_flush(nfit_blk->nd_region) < 0) dev_warn(dev, "unable to guarantee persistence of writes\n"); if (mmio->line_size == 0) @@ -1773,29 +1775,6 @@ static int acpi_nfit_blk_region_enable(struct nvdimm_bus *nvdimm_bus, return 0; } -static void acpi_nfit_blk_region_disable(struct nvdimm_bus *nvdimm_bus, - struct device *dev) -{ - struct nvdimm_bus_descriptor *nd_desc = to_nd_desc(nvdimm_bus); - struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc); - struct nd_blk_region *ndbr = to_nd_blk_region(dev); - struct nfit_blk *nfit_blk = nd_blk_region_provider_data(ndbr); - int i; - - if (!nfit_blk) - return; /* never enabled */ - - /* auto-free BLK spa mappings */ - for (i = 0; i < 2; i++) { - struct nfit_blk_mmio *mmio = &nfit_blk->mmio[i]; - - if (mmio->addr.base) - nfit_spa_unmap(acpi_desc, mmio->spa); - } - nd_blk_region_set_provider_data(ndbr, NULL); - /* devm will free nfit_blk */ -} - static int ars_get_cap(struct acpi_nfit_desc *acpi_desc, struct nd_cmd_ars_cap *cmd, struct nfit_spa *nfit_spa) { @@ -1919,11 +1898,11 @@ static int acpi_nfit_insert_resource(struct acpi_nfit_desc *acpi_desc, if (ret) return ret; - ret = devm_add_action(acpi_desc->dev, acpi_nfit_remove_resource, res); - if (ret) { - remove_resource(res); + ret = devm_add_action_or_reset(acpi_desc->dev, + acpi_nfit_remove_resource, + res); + if (ret) return ret; - } return 0; } @@ -1969,7 +1948,6 @@ static int acpi_nfit_init_mapping(struct acpi_nfit_desc *acpi_desc, ndr_desc->num_mappings = blk_valid; ndbr_desc = to_blk_region_desc(ndr_desc); ndbr_desc->enable = acpi_nfit_blk_region_enable; - ndbr_desc->disable = acpi_nfit_blk_region_disable; ndbr_desc->do_io = acpi_desc->blk_do_io; nfit_spa->nd_region = nvdimm_blk_region_create(acpi_desc->nvdimm_bus, ndr_desc); @@ -1981,6 +1959,14 @@ static int acpi_nfit_init_mapping(struct acpi_nfit_desc *acpi_desc, return 0; } +static bool nfit_spa_is_virtual(struct acpi_nfit_system_address *spa) +{ + return (nfit_spa_type(spa) == NFIT_SPA_VDISK || + nfit_spa_type(spa) == NFIT_SPA_VCD || + nfit_spa_type(spa) == NFIT_SPA_PDISK || + nfit_spa_type(spa) == NFIT_SPA_PCD); +} + static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc, struct nfit_spa *nfit_spa) { @@ -1996,7 +1982,7 @@ static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc, if (nfit_spa->nd_region) return 0; - if (spa->range_index == 0) { + if (spa->range_index == 0 && !nfit_spa_is_virtual(spa)) { dev_dbg(acpi_desc->dev, "%s: detected invalid spa index\n", __func__); return 0; @@ -2060,6 +2046,11 @@ static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc, ndr_desc); if (!nfit_spa->nd_region) rc = -ENOMEM; + } else if (nfit_spa_is_virtual(spa)) { + nfit_spa->nd_region = nvdimm_pmem_region_create(nvdimm_bus, + ndr_desc); + if (!nfit_spa->nd_region) + rc = -ENOMEM; } out: @@ -2139,7 +2130,7 @@ static void acpi_nfit_async_scrub(struct acpi_nfit_desc *acpi_desc, unsigned int tmo = scrub_timeout; int rc; - if (nfit_spa->ars_done || !nfit_spa->nd_region) + if (!nfit_spa->ars_required || !nfit_spa->nd_region) return; rc = ars_start(acpi_desc, nfit_spa); @@ -2228,7 +2219,9 @@ static void acpi_nfit_scrub(struct work_struct *work) * firmware initiated scrubs to complete and then we go search for the * affected spa regions to mark them scanned. In the second phase we * initiate a directed scrub for every range that was not scrubbed in - * phase 1. + * phase 1. If we're called for a 'rescan', we harmlessly pass through + * the first phase, but really only care about running phase 2, where + * regions can be notified of new poison. */ /* process platform firmware initiated scrubs */ @@ -2331,14 +2324,17 @@ static void acpi_nfit_scrub(struct work_struct *work) * Flag all the ranges that still need scrubbing, but * register them now to make data available. */ - if (nfit_spa->nd_region) - nfit_spa->ars_done = 1; - else + if (!nfit_spa->nd_region) { + nfit_spa->ars_required = 1; acpi_nfit_register_region(acpi_desc, nfit_spa); + } } list_for_each_entry(nfit_spa, &acpi_desc->spas, list) acpi_nfit_async_scrub(acpi_desc, nfit_spa); + acpi_desc->scrub_count++; + if (acpi_desc->scrub_count_state) + sysfs_notify_dirent(acpi_desc->scrub_count_state); mutex_unlock(&acpi_desc->init_mutex); } @@ -2376,14 +2372,89 @@ static int acpi_nfit_check_deletions(struct acpi_nfit_desc *acpi_desc, return 0; } -int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, acpi_size sz) +static int acpi_nfit_desc_init_scrub_attr(struct acpi_nfit_desc *acpi_desc) +{ + struct device *dev = acpi_desc->dev; + struct kernfs_node *nfit; + struct device *bus_dev; + + if (!ars_supported(acpi_desc->nvdimm_bus)) + return 0; + + bus_dev = to_nvdimm_bus_dev(acpi_desc->nvdimm_bus); + nfit = sysfs_get_dirent(bus_dev->kobj.sd, "nfit"); + if (!nfit) { + dev_err(dev, "sysfs_get_dirent 'nfit' failed\n"); + return -ENODEV; + } + acpi_desc->scrub_count_state = sysfs_get_dirent(nfit, "scrub"); + sysfs_put(nfit); + if (!acpi_desc->scrub_count_state) { + dev_err(dev, "sysfs_get_dirent 'scrub' failed\n"); + return -ENODEV; + } + + return 0; +} + +static void acpi_nfit_destruct(void *data) +{ + struct acpi_nfit_desc *acpi_desc = data; + struct device *bus_dev = to_nvdimm_bus_dev(acpi_desc->nvdimm_bus); + + /* + * Destruct under acpi_desc_lock so that nfit_handle_mce does not + * race teardown + */ + mutex_lock(&acpi_desc_lock); + acpi_desc->cancel = 1; + /* + * Bounce the nvdimm bus lock to make sure any in-flight + * acpi_nfit_ars_rescan() submissions have had a chance to + * either submit or see ->cancel set. + */ + device_lock(bus_dev); + device_unlock(bus_dev); + + flush_workqueue(nfit_wq); + if (acpi_desc->scrub_count_state) + sysfs_put(acpi_desc->scrub_count_state); + nvdimm_bus_unregister(acpi_desc->nvdimm_bus); + acpi_desc->nvdimm_bus = NULL; + list_del(&acpi_desc->list); + mutex_unlock(&acpi_desc_lock); +} + +int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *data, acpi_size sz) { struct device *dev = acpi_desc->dev; struct nfit_table_prev prev; const void *end; - u8 *data; int rc; + if (!acpi_desc->nvdimm_bus) { + acpi_nfit_init_dsms(acpi_desc); + + acpi_desc->nvdimm_bus = nvdimm_bus_register(dev, + &acpi_desc->nd_desc); + if (!acpi_desc->nvdimm_bus) + return -ENOMEM; + + rc = devm_add_action_or_reset(dev, acpi_nfit_destruct, + acpi_desc); + if (rc) + return rc; + + rc = acpi_nfit_desc_init_scrub_attr(acpi_desc); + if (rc) + return rc; + + /* register this acpi_desc for mce notifications */ + mutex_lock(&acpi_desc_lock); + list_add_tail(&acpi_desc->list, &acpi_descs); + mutex_unlock(&acpi_desc_lock); + } + mutex_lock(&acpi_desc->init_mutex); INIT_LIST_HEAD(&prev.spas); @@ -2406,7 +2477,6 @@ int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, acpi_size sz) list_cut_position(&prev.flushes, &acpi_desc->flushes, acpi_desc->flushes.prev); - data = (u8 *) acpi_desc->nfit; end = data + sz; while (!IS_ERR_OR_NULL(data)) data = add_table(acpi_desc, &prev, data, end); @@ -2422,12 +2492,9 @@ int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, acpi_size sz) if (rc) goto out_unlock; - if (nfit_mem_init(acpi_desc) != 0) { - rc = -ENOMEM; + rc = nfit_mem_init(acpi_desc); + if (rc) goto out_unlock; - } - - acpi_nfit_init_dsms(acpi_desc); rc = acpi_nfit_register_dimms(acpi_desc); if (rc) @@ -2496,6 +2563,33 @@ static int acpi_nfit_clear_to_send(struct nvdimm_bus_descriptor *nd_desc, return 0; } +int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc) +{ + struct device *dev = acpi_desc->dev; + struct nfit_spa *nfit_spa; + + if (work_busy(&acpi_desc->work)) + return -EBUSY; + + if (acpi_desc->cancel) + return 0; + + mutex_lock(&acpi_desc->init_mutex); + list_for_each_entry(nfit_spa, &acpi_desc->spas, list) { + struct acpi_nfit_system_address *spa = nfit_spa->spa; + + if (nfit_spa_type(spa) != NFIT_SPA_PM) + continue; + + nfit_spa->ars_required = 1; + } + queue_work(nfit_wq, &acpi_desc->work); + dev_dbg(dev, "%s: ars_scan triggered\n", __func__); + mutex_unlock(&acpi_desc->init_mutex); + + return 0; +} + void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev) { struct nvdimm_bus_descriptor *nd_desc; @@ -2505,12 +2599,12 @@ void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev) acpi_desc->blk_do_io = acpi_nfit_blk_region_do_io; nd_desc = &acpi_desc->nd_desc; nd_desc->provider_name = "ACPI.NFIT"; + nd_desc->module = THIS_MODULE; nd_desc->ndctl = acpi_nfit_ctl; nd_desc->flush_probe = acpi_nfit_flush_probe; nd_desc->clear_to_send = acpi_nfit_clear_to_send; nd_desc->attr_groups = acpi_nfit_attribute_groups; - INIT_LIST_HEAD(&acpi_desc->spa_maps); INIT_LIST_HEAD(&acpi_desc->spas); INIT_LIST_HEAD(&acpi_desc->dcrs); INIT_LIST_HEAD(&acpi_desc->bdws); @@ -2518,7 +2612,7 @@ void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev) INIT_LIST_HEAD(&acpi_desc->flushes); INIT_LIST_HEAD(&acpi_desc->memdevs); INIT_LIST_HEAD(&acpi_desc->dimms); - mutex_init(&acpi_desc->spa_map_mutex); + INIT_LIST_HEAD(&acpi_desc->list); mutex_init(&acpi_desc->init_mutex); INIT_WORK(&acpi_desc->work, acpi_nfit_scrub); } @@ -2532,7 +2626,7 @@ static int acpi_nfit_add(struct acpi_device *adev) struct acpi_table_header *tbl; acpi_status status = AE_OK; acpi_size sz; - int rc; + int rc = 0; status = acpi_get_table_with_size(ACPI_SIG_NFIT, 0, &tbl, &sz); if (ACPI_FAILURE(status)) { @@ -2545,50 +2639,33 @@ static int acpi_nfit_add(struct acpi_device *adev) if (!acpi_desc) return -ENOMEM; acpi_nfit_desc_init(acpi_desc, &adev->dev); - acpi_desc->nvdimm_bus = nvdimm_bus_register(dev, &acpi_desc->nd_desc); - if (!acpi_desc->nvdimm_bus) - return -ENOMEM; - /* - * Save the acpi header for later and then skip it, - * making nfit point to the first nfit table header. - */ + /* Save the acpi header for exporting the revision via sysfs */ acpi_desc->acpi_header = *tbl; - acpi_desc->nfit = (void *) tbl + sizeof(struct acpi_table_nfit); - sz -= sizeof(struct acpi_table_nfit); /* Evaluate _FIT and override with that if present */ status = acpi_evaluate_object(adev->handle, "_FIT", NULL, &buf); if (ACPI_SUCCESS(status) && buf.length > 0) { - union acpi_object *obj; - /* - * Adjust for the acpi_object header of the _FIT - */ - obj = buf.pointer; - if (obj->type == ACPI_TYPE_BUFFER) { - acpi_desc->nfit = - (struct acpi_nfit_header *)obj->buffer.pointer; - sz = obj->buffer.length; - } else + union acpi_object *obj = buf.pointer; + + if (obj->type == ACPI_TYPE_BUFFER) + rc = acpi_nfit_init(acpi_desc, obj->buffer.pointer, + obj->buffer.length); + else dev_dbg(dev, "%s invalid type %d, ignoring _FIT\n", __func__, (int) obj->type); - } - - rc = acpi_nfit_init(acpi_desc, sz); - if (rc) { - nvdimm_bus_unregister(acpi_desc->nvdimm_bus); - return rc; - } - return 0; + kfree(buf.pointer); + } else + /* skip over the lead-in header table */ + rc = acpi_nfit_init(acpi_desc, (void *) tbl + + sizeof(struct acpi_table_nfit), + sz - sizeof(struct acpi_table_nfit)); + return rc; } static int acpi_nfit_remove(struct acpi_device *adev) { - struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(&adev->dev); - - acpi_desc->cancel = 1; - flush_workqueue(nfit_wq); - nvdimm_bus_unregister(acpi_desc->nvdimm_bus); + /* see acpi_nfit_destruct */ return 0; } @@ -2596,9 +2673,8 @@ static void acpi_nfit_notify(struct acpi_device *adev, u32 event) { struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(&adev->dev); struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL }; - struct acpi_nfit_header *nfit_saved; - union acpi_object *obj; struct device *dev = &adev->dev; + union acpi_object *obj; acpi_status status; int ret; @@ -2616,9 +2692,6 @@ static void acpi_nfit_notify(struct acpi_device *adev, u32 event) if (!acpi_desc) goto out_unlock; acpi_nfit_desc_init(acpi_desc, &adev->dev); - acpi_desc->nvdimm_bus = nvdimm_bus_register(dev, &acpi_desc->nd_desc); - if (!acpi_desc->nvdimm_bus) - goto out_unlock; } else { /* * Finish previous registration before considering new @@ -2634,21 +2707,14 @@ static void acpi_nfit_notify(struct acpi_device *adev, u32 event) goto out_unlock; } - nfit_saved = acpi_desc->nfit; obj = buf.pointer; if (obj->type == ACPI_TYPE_BUFFER) { - acpi_desc->nfit = - (struct acpi_nfit_header *)obj->buffer.pointer; - ret = acpi_nfit_init(acpi_desc, obj->buffer.length); - if (ret) { - /* Merge failed, restore old nfit, and exit */ - acpi_desc->nfit = nfit_saved; + ret = acpi_nfit_init(acpi_desc, obj->buffer.pointer, + obj->buffer.length); + if (ret) dev_err(dev, "failed to merge updated NFIT\n"); - } - } else { - /* Bad _FIT, restore old nfit */ + } else dev_err(dev, "Invalid _FIT\n"); - } kfree(buf.pointer); out_unlock: @@ -2693,18 +2759,23 @@ static __init int nfit_init(void) acpi_str_to_uuid(UUID_NFIT_DIMM, nfit_uuid[NFIT_DEV_DIMM]); acpi_str_to_uuid(UUID_NFIT_DIMM_N_HPE1, nfit_uuid[NFIT_DEV_DIMM_N_HPE1]); acpi_str_to_uuid(UUID_NFIT_DIMM_N_HPE2, nfit_uuid[NFIT_DEV_DIMM_N_HPE2]); + acpi_str_to_uuid(UUID_NFIT_DIMM_N_MSFT, nfit_uuid[NFIT_DEV_DIMM_N_MSFT]); nfit_wq = create_singlethread_workqueue("nfit"); if (!nfit_wq) return -ENOMEM; + nfit_mce_register(); + return acpi_bus_register_driver(&acpi_nfit_driver); } static __exit void nfit_exit(void) { + nfit_mce_unregister(); acpi_bus_unregister_driver(&acpi_nfit_driver); destroy_workqueue(nfit_wq); + WARN_ON(!list_empty(&acpi_descs)); } module_init(nfit_init); diff --git a/drivers/acpi/nfit/mce.c b/drivers/acpi/nfit/mce.c new file mode 100644 index 000000000000..4c745bf389fe --- /dev/null +++ b/drivers/acpi/nfit/mce.c @@ -0,0 +1,89 @@ +/* + * NFIT - Machine Check Handler + * + * Copyright(c) 2013-2016 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ +#include <linux/notifier.h> +#include <linux/acpi.h> +#include <asm/mce.h> +#include "nfit.h" + +static int nfit_handle_mce(struct notifier_block *nb, unsigned long val, + void *data) +{ + struct mce *mce = (struct mce *)data; + struct acpi_nfit_desc *acpi_desc; + struct nfit_spa *nfit_spa; + + /* We only care about memory errors */ + if (!(mce->status & MCACOD)) + return NOTIFY_DONE; + + /* + * mce->addr contains the physical addr accessed that caused the + * machine check. We need to walk through the list of NFITs, and see + * if any of them matches that address, and only then start a scrub. + */ + mutex_lock(&acpi_desc_lock); + list_for_each_entry(acpi_desc, &acpi_descs, list) { + struct device *dev = acpi_desc->dev; + int found_match = 0; + + mutex_lock(&acpi_desc->init_mutex); + list_for_each_entry(nfit_spa, &acpi_desc->spas, list) { + struct acpi_nfit_system_address *spa = nfit_spa->spa; + + if (nfit_spa_type(spa) == NFIT_SPA_PM) + continue; + /* find the spa that covers the mce addr */ + if (spa->address > mce->addr) + continue; + if ((spa->address + spa->length - 1) < mce->addr) + continue; + found_match = 1; + dev_dbg(dev, "%s: addr in SPA %d (0x%llx, 0x%llx)\n", + __func__, spa->range_index, spa->address, + spa->length); + /* + * We can break at the first match because we're going + * to rescan all the SPA ranges. There shouldn't be any + * aliasing anyway. + */ + break; + } + mutex_unlock(&acpi_desc->init_mutex); + + /* + * We can ignore an -EBUSY here because if an ARS is already + * in progress, just let that be the last authoritative one + */ + if (found_match) + acpi_nfit_ars_rescan(acpi_desc); + } + + mutex_unlock(&acpi_desc_lock); + return NOTIFY_DONE; +} + +static struct notifier_block nfit_mce_dec = { + .notifier_call = nfit_handle_mce, +}; + +void nfit_mce_register(void) +{ + mce_register_decode_chain(&nfit_mce_dec); +} + +void nfit_mce_unregister(void) +{ + mce_unregister_decode_chain(&nfit_mce_dec); +} diff --git a/drivers/acpi/nfit.h b/drivers/acpi/nfit/nfit.h index 02b9ea1e8d2e..e894ded24d99 100644 --- a/drivers/acpi/nfit.h +++ b/drivers/acpi/nfit/nfit.h @@ -16,6 +16,7 @@ #define __NFIT_H__ #include <linux/workqueue.h> #include <linux/libnvdimm.h> +#include <linux/ndctl.h> #include <linux/types.h> #include <linux/uuid.h> #include <linux/acpi.h> @@ -31,6 +32,9 @@ #define UUID_NFIT_DIMM_N_HPE1 "9002c334-acf3-4c0e-9642-a235f0d53bc6" #define UUID_NFIT_DIMM_N_HPE2 "5008664b-b758-41a0-a03c-27c2f2d04f7e" +/* https://msdn.microsoft.com/library/windows/hardware/mt604741 */ +#define UUID_NFIT_DIMM_N_MSFT "1ee68b36-d4bd-4a1a-9a16-4f8e53d46e05" + #define ACPI_NFIT_MEM_FAILED_MASK (ACPI_NFIT_MEM_SAVE_FAILED \ | ACPI_NFIT_MEM_RESTORE_FAILED | ACPI_NFIT_MEM_FLUSH_FAILED \ | ACPI_NFIT_MEM_NOT_ARMED) @@ -40,6 +44,7 @@ enum nfit_uuids { NFIT_DEV_DIMM = NVDIMM_FAMILY_INTEL, NFIT_DEV_DIMM_N_HPE1 = NVDIMM_FAMILY_HPE1, NFIT_DEV_DIMM_N_HPE2 = NVDIMM_FAMILY_HPE2, + NFIT_DEV_DIMM_N_MSFT = NVDIMM_FAMILY_MSFT, NFIT_SPA_VOLATILE, NFIT_SPA_PM, NFIT_SPA_DCR, @@ -74,37 +79,37 @@ enum { }; struct nfit_spa { - struct acpi_nfit_system_address *spa; struct list_head list; struct nd_region *nd_region; - unsigned int ars_done:1; + unsigned int ars_required:1; u32 clear_err_unit; u32 max_ars; + struct acpi_nfit_system_address spa[0]; }; struct nfit_dcr { - struct acpi_nfit_control_region *dcr; struct list_head list; + struct acpi_nfit_control_region dcr[0]; }; struct nfit_bdw { - struct acpi_nfit_data_region *bdw; struct list_head list; + struct acpi_nfit_data_region bdw[0]; }; struct nfit_idt { - struct acpi_nfit_interleave *idt; struct list_head list; + struct acpi_nfit_interleave idt[0]; }; struct nfit_flush { - struct acpi_nfit_flush_address *flush; struct list_head list; + struct acpi_nfit_flush_address flush[0]; }; struct nfit_memdev { - struct acpi_nfit_memory_map *memdev; struct list_head list; + struct acpi_nfit_memory_map memdev[0]; }; /* assembled tables for a given dimm/memory-device */ @@ -123,6 +128,7 @@ struct nfit_mem { struct list_head list; struct acpi_device *adev; struct acpi_nfit_desc *acpi_desc; + struct resource *flush_wpq; unsigned long dsm_mask; int family; }; @@ -130,10 +136,7 @@ struct nfit_mem { struct acpi_nfit_desc { struct nvdimm_bus_descriptor nd_desc; struct acpi_table_header acpi_header; - struct acpi_nfit_header *nfit; - struct mutex spa_map_mutex; struct mutex init_mutex; - struct list_head spa_maps; struct list_head memdevs; struct list_head flushes; struct list_head dimms; @@ -146,6 +149,9 @@ struct acpi_nfit_desc { struct nd_cmd_ars_status *ars_status; size_t ars_status_size; struct work_struct work; + struct list_head list; + struct kernfs_node *scrub_count_state; + unsigned int scrub_count; unsigned int cancel:1; unsigned long dimm_cmd_force_en; unsigned long bus_cmd_force_en; @@ -161,7 +167,7 @@ enum nd_blk_mmio_selector { struct nd_blk_addr { union { void __iomem *base; - void __pmem *aperture; + void *aperture; }; }; @@ -180,28 +186,26 @@ struct nfit_blk { u64 bdw_offset; /* post interleave offset */ u64 stat_offset; u64 cmd_offset; - void __iomem *nvdimm_flush; u32 dimm_flags; }; -enum spa_map_type { - SPA_MAP_CONTROL, - SPA_MAP_APERTURE, -}; - -struct nfit_spa_mapping { - struct acpi_nfit_desc *acpi_desc; - struct acpi_nfit_system_address *spa; - struct list_head list; - struct kref kref; - enum spa_map_type type; - struct nd_blk_addr addr; -}; +extern struct list_head acpi_descs; +extern struct mutex acpi_desc_lock; +int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc); -static inline struct nfit_spa_mapping *to_spa_map(struct kref *kref) +#ifdef CONFIG_X86_MCE +void nfit_mce_register(void); +void nfit_mce_unregister(void); +#else +static inline void nfit_mce_register(void) { - return container_of(kref, struct nfit_spa_mapping, kref); } +static inline void nfit_mce_unregister(void) +{ +} +#endif + +int nfit_spa_type(struct acpi_nfit_system_address *spa); static inline struct acpi_nfit_memory_map *__to_nfit_memdev( struct nfit_mem *nfit_mem) @@ -218,6 +222,6 @@ static inline struct acpi_nfit_desc *to_acpi_desc( } const u8 *to_nfit_uuid(enum nfit_uuids id); -int acpi_nfit_init(struct acpi_nfit_desc *nfit, acpi_size sz); +int acpi_nfit_init(struct acpi_nfit_desc *acpi_desc, void *nfit, acpi_size sz); void acpi_nfit_desc_init(struct acpi_nfit_desc *acpi_desc, struct device *dev); #endif /* __NFIT_H__ */ |