nfit, libnvdimm: clarify "commands" vs "_DSMs"
Clarify the distinction between "commands", the ioctls userspace calls
to request the kernel take some action on a given dimm device, and
"_DSMs", the actual function numbers used in the firmware interface to
the DIMM. _DSMs are ACPI specific whereas commands are Linux kernel
generic.
This is in preparation for breaking the 1:1 implicit relationship
between the kernel ioctl number space and the firmware specific function
numbers.
Cc: Jerry Hoemann <jerry.hoemann@hpe.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/acpi/nfit.c b/drivers/acpi/nfit.c
index d0f35e6..1b98e9d 100644
--- a/drivers/acpi/nfit.c
+++ b/drivers/acpi/nfit.c
@@ -175,7 +175,7 @@
union acpi_object in_obj, in_buf, *out_obj;
struct device *dev = acpi_desc->dev;
const char *cmd_name, *dimm_name;
- unsigned long dsm_mask;
+ unsigned long cmd_mask;
acpi_handle handle;
const u8 *uuid;
u32 offset;
@@ -189,7 +189,7 @@
return -ENOTTY;
dimm_name = nvdimm_name(nvdimm);
cmd_name = nvdimm_cmd_name(cmd);
- dsm_mask = nfit_mem->dsm_mask;
+ cmd_mask = nvdimm_cmd_mask(nvdimm);
desc = nd_cmd_dimm_desc(cmd);
uuid = to_nfit_uuid(NFIT_DEV_DIMM);
handle = adev->handle;
@@ -197,7 +197,7 @@
struct acpi_device *adev = to_acpi_dev(acpi_desc);
cmd_name = nvdimm_bus_cmd_name(cmd);
- dsm_mask = nd_desc->dsm_mask;
+ cmd_mask = nd_desc->cmd_mask;
desc = nd_cmd_bus_desc(cmd);
uuid = to_nfit_uuid(NFIT_DEV_BUS);
handle = adev->handle;
@@ -207,7 +207,7 @@
if (!desc || (cmd && (desc->out_num + desc->in_num == 0)))
return -ENOTTY;
- if (!test_bit(cmd, &dsm_mask))
+ if (!test_bit(cmd, &cmd_mask))
return -ENOTTY;
in_obj.type = ACPI_TYPE_PACKAGE;
@@ -926,7 +926,8 @@
const u8 *uuid = to_nfit_uuid(NFIT_DEV_DIMM);
int i;
- nfit_mem->dsm_mask = acpi_desc->dimm_dsm_force_en;
+ /* nfit test assumes 1:1 relationship between commands and dsms */
+ nfit_mem->dsm_mask = acpi_desc->dimm_cmd_force_en;
adev = to_acpi_dev(acpi_desc);
if (!adev)
return 0;
@@ -976,9 +977,13 @@
if (rc)
continue;
+ /*
+ * For now there is 1:1 relationship between cmd_mask and
+ * dsm_mask.
+ */
nvdimm = nvdimm_create(acpi_desc->nvdimm_bus, nfit_mem,
acpi_nfit_dimm_attribute_groups,
- flags, &nfit_mem->dsm_mask);
+ flags, nfit_mem->dsm_mask);
if (!nvdimm)
return -ENOMEM;
@@ -1007,14 +1012,14 @@
struct acpi_device *adev;
int i;
- nd_desc->dsm_mask = acpi_desc->bus_dsm_force_en;
+ nd_desc->cmd_mask = acpi_desc->bus_cmd_force_en;
adev = to_acpi_dev(acpi_desc);
if (!adev)
return;
for (i = ND_CMD_ARS_CAP; i <= ND_CMD_CLEAR_ERROR; i++)
if (acpi_check_dsm(adev->handle, uuid, 1, 1ULL << i))
- set_bit(i, &nd_desc->dsm_mask);
+ set_bit(i, &nd_desc->cmd_mask);
}
static ssize_t range_index_show(struct device *dev,
diff --git a/drivers/acpi/nfit.h b/drivers/acpi/nfit.h
index c75576b..332ee6f 100644
--- a/drivers/acpi/nfit.h
+++ b/drivers/acpi/nfit.h
@@ -132,8 +132,8 @@
size_t ars_status_size;
struct work_struct work;
unsigned int cancel:1;
- unsigned long dimm_dsm_force_en;
- unsigned long bus_dsm_force_en;
+ unsigned long dimm_cmd_force_en;
+ unsigned long bus_cmd_force_en;
int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa,
void *iobuf, u64 len, int rw);
};