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libnvdimm, nfit: move flush hint mapping to region-device driver-data

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In preparation for triggering flushes of a DIMM's writes-posted-queue
(WPQ) via the pmem driver move mapping of flush hint addresses to the
region driver.  Since this uses devm_nvdimm_memremap() the flush
addresses will remain mapped while any region to which the dimm belongs
is active.

We need to communicate more information to the nvdimm core to facilitate
this mapping, namely each dimm object now carries an array of flush hint
address resources.

Signed-off-by: Dan Williams <[email protected]>
This commit is contained in:
Dan Williams 2016-06-07 17:00:04 -07:00
commit e5ae3b252c
8 changed files with 119 additions and 18 deletions
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21
drivers/acpi/nfit.c
View file

@ -714,9 +714,24 @@ static int nfit_mem_dcr_init(struct acpi_nfit_desc *acpi_desc,
}
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;
}
@ -1171,6 +1186,7 @@ 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 +1220,12 @@ 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;

1
drivers/acpi/nfit.h
View file

@ -127,6 +127,7 @@ 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;
};