From e5ae3b252c6732f838f5695170bbf2ea9fb5b9ff Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Tue, 7 Jun 2016 17:00:04 -0700 Subject: libnvdimm, nfit: move flush hint mapping to region-device driver-data 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 --- drivers/acpi/nfit.c | 21 ++++++++++++++++++++- drivers/acpi/nfit.h | 1 + 2 files changed, 21 insertions(+), 1 deletion(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/nfit.c b/drivers/acpi/nfit.c index b76c95981547..6796f780870a 100644 --- a/drivers/acpi/nfit.c +++ b/drivers/acpi/nfit.c @@ -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; diff --git a/drivers/acpi/nfit.h b/drivers/acpi/nfit.h index 52078475d969..9282eb324dcc 100644 --- a/drivers/acpi/nfit.h +++ b/drivers/acpi/nfit.h @@ -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; }; -- cgit v1.2.3