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acpi/nfit: Issue Start ARS to retrieve existing records 

ACPI 6.2 defines in section 9.20.7.2 that the OSPM may call a Start
ARS with Flags Bit [1] set upon receiving the 0x81 notification.

  Upon receiving the notification, the OSPM may decide to issue
  a Start ARS with Flags Bit [1] set to prepare for the retrieval
  of existing records and issue the Query ARS Status function to
  retrieve the records.

Add support to call a Start ARS from acpi_nfit_uc_error_notify()
with ND_ARS_RETURN_PREV_DATA set when HW_ERROR_SCRUB_ON is not set.

Link: http://www.uefi.org/sites/default/files/resources/ACPI_6_2.pdf
Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Cc: Linda Knippers <linda.knippers@hpe.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Toshi Kani 2017-06-29 20:41:30 -06:00 committed by Dan Williams
parent 759d6a9641
commit 807900395e
4 changed files with 14 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/acpi/nfit/core.c
View File

@ -1044,7 +1044,7 @@ static ssize_t scrub_store(struct device *dev,
if (nd_desc) {
struct acpi_nfit_desc *acpi_desc = to_acpi_desc(nd_desc);
rc = acpi_nfit_ars_rescan(acpi_desc);
rc = acpi_nfit_ars_rescan(acpi_desc, 0);
}
device_unlock(dev);
if (rc)
@ -2137,6 +2137,7 @@ static int ars_start(struct acpi_nfit_desc *acpi_desc, struct nfit_spa *nfit_spa
memset(&ars_start, 0, sizeof(ars_start));
ars_start.address = spa->address;
ars_start.length = spa->length;
ars_start.flags = acpi_desc->ars_start_flags;
if (nfit_spa_type(spa) == NFIT_SPA_PM)
ars_start.type = ND_ARS_PERSISTENT;
else if (nfit_spa_type(spa) == NFIT_SPA_VOLATILE)
@ -2163,6 +2164,7 @@ static int ars_continue(struct acpi_nfit_desc *acpi_desc)
ars_start.address = ars_status->restart_address;
ars_start.length = ars_status->restart_length;
ars_start.type = ars_status->type;
ars_start.flags = acpi_desc->ars_start_flags;
rc = nd_desc->ndctl(nd_desc, NULL, ND_CMD_ARS_START, &ars_start,
sizeof(ars_start), &cmd_rc);
if (rc < 0)
@ -2684,6 +2686,7 @@ static void acpi_nfit_scrub(struct work_struct *work)
list_for_each_entry(nfit_spa, &acpi_desc->spas, list)
acpi_nfit_async_scrub(acpi_desc, nfit_spa);
acpi_desc->scrub_count++;
acpi_desc->ars_start_flags = 0;
if (acpi_desc->scrub_count_state)
sysfs_notify_dirent(acpi_desc->scrub_count_state);
mutex_unlock(&acpi_desc->init_mutex);
@ -2702,6 +2705,7 @@ static int acpi_nfit_register_regions(struct acpi_nfit_desc *acpi_desc)
return rc;
}
acpi_desc->ars_start_flags = 0;
if (!acpi_desc->cancel)
queue_work(nfit_wq, &acpi_desc->work);
return 0;
@ -2906,7 +2910,7 @@ 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)
int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc, u8 flags)
{
struct device *dev = acpi_desc->dev;
struct nfit_spa *nfit_spa;
@ -2928,6 +2932,7 @@ int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc)
nfit_spa->ars_required = 1;
}
acpi_desc->ars_start_flags = flags;
queue_work(nfit_wq, &acpi_desc->work);
dev_dbg(dev, "%s: ars_scan triggered\n", __func__);
mutex_unlock(&acpi_desc->init_mutex);
@ -3104,8 +3109,10 @@ static void acpi_nfit_update_notify(struct device *dev, acpi_handle handle)
static void acpi_nfit_uc_error_notify(struct device *dev, acpi_handle handle)
{
struct acpi_nfit_desc *acpi_desc = dev_get_drvdata(dev);
u8 flags = (acpi_desc->scrub_mode == HW_ERROR_SCRUB_ON) ?
0 : ND_ARS_RETURN_PREV_DATA;
acpi_nfit_ars_rescan(acpi_desc);
acpi_nfit_ars_rescan(acpi_desc, flags);
}
void __acpi_nfit_notify(struct device *dev, acpi_handle handle, u32 event)

2
drivers/acpi/nfit/mce.c
View File

@ -79,7 +79,7 @@ static int nfit_handle_mce(struct notifier_block *nb, unsigned long val,
* already in progress, just let that be the last
* authoritative one
*/
acpi_nfit_ars_rescan(acpi_desc);
acpi_nfit_ars_rescan(acpi_desc, 0);
}
break;
}

3
drivers/acpi/nfit/nfit.h
View File

@ -155,6 +155,7 @@ struct acpi_nfit_desc {
struct list_head idts;
struct nvdimm_bus *nvdimm_bus;
struct device *dev;
u8 ars_start_flags;
struct nd_cmd_ars_status *ars_status;
size_t ars_status_size;
struct work_struct work;
@ -207,7 +208,7 @@ struct nfit_blk {
extern struct list_head acpi_descs;
extern struct mutex acpi_desc_lock;
int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc);
int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc, u8 flags);
#ifdef CONFIG_X86_MCE
void nfit_mce_register(void);

1
include/uapi/linux/ndctl.h
View File

@ -207,6 +207,7 @@ enum {
enum {
ND_ARS_VOLATILE = 1,
ND_ARS_PERSISTENT = 2,
ND_ARS_RETURN_PREV_DATA = 1 << 1,
ND_CONFIG_LOCKED = 1,
};