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authorDan Williams <dan.j.williams@intel.com>2018-04-02 15:40:30 -0700
committerDan Williams <dan.j.williams@intel.com>2018-04-05 20:10:55 -0700
commit14c73f997a5e060c6887a80c143021a58975c92a (patch)
tree69767964c99f4767c6b0abbf3342513e213e4503 /drivers/acpi/nfit
parent243f29fe449bbead69076ad861dbe8f51b42c4d7 (diff)
downloadlinux-14c73f997a5e060c6887a80c143021a58975c92a.tar.bz2
nfit, address-range-scrub: introduce nfit_spa->ars_state
In preparation for re-working the ARS implementation to better handle short vs long ARS runs, introduce nfit_spa->ars_state. For now this just replaces the nfit_spa->ars_required bit-field/flag, but going forward it will be used to track ARS completion and make short vs long ARS requests. Reviewed-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/acpi/nfit')
-rw-r--r--drivers/acpi/nfit/core.c16
-rw-r--r--drivers/acpi/nfit/nfit.h11
2 files changed, 18 insertions, 9 deletions
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 2a1fc3817a81..9c56022c216f 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -2808,7 +2808,7 @@ static void acpi_nfit_async_scrub(struct acpi_nfit_desc *acpi_desc,
unsigned int tmo = scrub_timeout;
int rc;
- if (!nfit_spa->ars_required || !nfit_spa->nd_region)
+ if (!test_bit(ARS_REQ, &nfit_spa->ars_state) || !nfit_spa->nd_region)
return;
rc = ars_start(acpi_desc, nfit_spa);
@@ -3003,7 +3003,7 @@ static void acpi_nfit_scrub(struct work_struct *work)
* register them now to make data available.
*/
if (!nfit_spa->nd_region) {
- nfit_spa->ars_required = 1;
+ set_bit(ARS_REQ, &nfit_spa->ars_state);
acpi_nfit_register_region(acpi_desc, nfit_spa);
}
}
@@ -3241,7 +3241,7 @@ 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, u8 flags)
+int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc, unsigned long flags)
{
struct device *dev = acpi_desc->dev;
struct nfit_spa *nfit_spa;
@@ -3261,9 +3261,11 @@ int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc, u8 flags)
if (nfit_spa_type(spa) != NFIT_SPA_PM)
continue;
- nfit_spa->ars_required = 1;
+ set_bit(ARS_REQ, &nfit_spa->ars_state);
}
- acpi_desc->ars_start_flags = flags;
+ acpi_desc->ars_start_flags = 0;
+ if (test_bit(ARS_SHORT, &flags))
+ acpi_desc->ars_start_flags |= ND_ARS_RETURN_PREV_DATA;
queue_work(nfit_wq, &acpi_desc->work);
dev_dbg(dev, "ars_scan triggered\n");
mutex_unlock(&acpi_desc->init_mutex);
@@ -3440,8 +3442,8 @@ 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;
+ unsigned long flags = (acpi_desc->scrub_mode == HW_ERROR_SCRUB_ON) ?
+ 0 : 1 << ARS_SHORT;
acpi_nfit_ars_rescan(acpi_desc, flags);
}
diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h
index ac9c49463731..2b97e5f76bdf 100644
--- a/drivers/acpi/nfit/nfit.h
+++ b/drivers/acpi/nfit/nfit.h
@@ -117,10 +117,17 @@ enum nfit_dimm_notifiers {
NFIT_NOTIFY_DIMM_HEALTH = 0x81,
};
+enum nfit_ars_state {
+ ARS_REQ,
+ ARS_DONE,
+ ARS_SHORT,
+ ARS_FAILED,
+};
+
struct nfit_spa {
struct list_head list;
struct nd_region *nd_region;
- unsigned int ars_required:1;
+ unsigned long ars_state;
u32 clear_err_unit;
u32 max_ars;
struct acpi_nfit_system_address spa[0];
@@ -243,7 +250,7 @@ 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, u8 flags);
+int acpi_nfit_ars_rescan(struct acpi_nfit_desc *acpi_desc, unsigned long flags);
#ifdef CONFIG_X86_MCE
void nfit_mce_register(void);